KR20180055738A - Dc-dc converter - Google Patents

Abstract

An embodiment of the present invention relates to a DC-DC converter having improved cooling efficiency of a heating module. The DC-DC converter comprises: a primary coil; a secondary coil generating induced current by the primary coil; first and second terminals extending from the secondary coil; an inductor coil connected to the second terminal to rectify the current; and a third terminal extending from the inductor coil. The first terminal, the primary coil, the second terminal, the inductor coil, and the third terminal are integrally formed.

Description

[0001] DC-DC CONVERTER [0001]

The present embodiment relates to a DC-DC converter.

The following description provides background information for the present embodiment and does not describe the prior art.

With the emergence of environmentally friendly vehicles using electric power, it is required to reduce the weight and size of electric parts for vehicles. The vehicle DC-DC converter is a device for controlling the DC voltage in the vehicle.

Particularly, in an electric vehicle, a voltage of a current generated in a battery is changed and supplied to a motor. In addition, when the electric vehicle goes down the slope road, the motor serves as a generator to charge the battery. In this case, the electric current generated by the motor is changed and supplied to the battery.

Various electronic components are placed in the DC-DC converter. It is necessary to improve the cooling efficiency of the heat-generating module for various reasons such as the weight reduction of the DC-DC converter and the implementation of the compact structure.

On the other hand, the main configuration of the DC-DC converter includes a primary coil through which a current supplied from the outside flows, a secondary coil which generates an induced current by a current flowing through the primary coil, Of the inductor coil. More specifically, the conversion of the current is made by electromagnetic interactions of the primary and secondary coils, and the converted current is filtered through the inductor coil to filter the noise frequency and then to the external device via a busbar . Generally, the secondary coil, the inductor coil, and the bus bar are manufactured as a single member through a complicated process such as sheet press cutting, bolt hole punching, bending, forging, and the like. However, such a manufacturing process is too complicated, and further, when the bolt is fastened, there is a problem that the fastening is completely prevented or the gap is caused by the warping of the material. In particular, the gap between the secondary coil-inductor coil and the inductor coil-bus bar causes problems such as heat generation due to an increase in contact resistance as well as deterioration in electrical characteristics. In addition, since the secondary coil, the inductor coil, and the bus bar are made of a single member, the size and weight of the DC-DC converter increase.

Meanwhile, the DC-DC converter may include a cooling plate arranged in the housing and the housing in the form of a horizontal partition to divide the housing into the first region and the second region. In addition, cooling passages are formed in the first region, and cooling water flows, and electronic components (for example, substrates for mounting various devices) are disposed in the second region. That is, the first region performs a function of cooling the electronic component portion with the cooling section, and the second region performs an electronic control function of converting the voltage of the external power source into the electronic component section. Recently, researches are being carried out to increase the size of the DC-DC converter and the cooling efficiency of the electronic parts by the request of the vehicle manufacturer and the arrival of smart and hybrid vehicles.

In the first embodiment, a DC-DC converter having improved cooling efficiency of a heat-generating module is provided.

In the second embodiment, a secondary coil, an inductor coil, and a bus bar are integrally formed to simplify the manufacturing process and improve the conversion efficiency. In addition, a DC including a coil module having a compact structure To-DC converter.

In the third embodiment, it is desired to provide a DC-DC converter having a reduced size and high cooling efficiency.

The DC-DC converter of the first embodiment includes: a housing; A plurality of electronic components disposed in the housing; Wherein the width of the extension portion is larger than the width of the flow path of the front end of the expansion portion and the vertical width of the expansion portion is larger than the width of the flow path of the front end portion of the expansion portion, And the difference between the largest portion and the smallest portion of the area of the cross section perpendicular to the moving direction of the cooling material in the flow passage may be within 10%.

The plurality of electronic parts may include a plurality of heating elements, and one of the plurality of heating elements may be disposed corresponding to the extending part.

One of the plurality of heating elements may vertically overlap with the extending portion.

An area overlapping with one of the plurality of heating elements in the vertical direction in the maximum horizontal cross-section of the extension portion may be 30% or more.

The maximum horizontal cross-section of the extension may be at least 90% of the maximum horizontal cross-section of one of the plurality of heating elements.

A protruding portion protruding in the direction of the lower plate may be positioned on the bottom surface of the extension portion.

The protrusion height of the protrusion can increase along the moving direction of the cooling material and decrease.

The projecting portion has a vertical cross section in a rectangular shape, and the area of the vertical cross section of the projecting portion may increase and decrease along the moving direction of the cooling material.

The horizontal cross-section of the protrusion may have a convex curvature toward the lower plate. The area of the horizontal cross-section of the protrusion may decrease from the center of the width of the flow passage to the edge.

The area of the vertical cross section of the flow path may be the same along the moving direction of the cooling material.

The plurality of electronic components may include a plurality of heating elements, and the plurality of heating elements may include a diode module, and the diode module may be arranged to correspond to the extending portion in a vertical direction.

Wherein the flow path further includes an inlet portion through which the cooling material sequentially moves, a first curve portion, a second curve portion, and a discharge portion, the inlet portion and the discharge portion being spaced apart in the transverse direction of the flow passage, The first curve portion and the extension portion may be spaced apart in the widthwise direction of the flow path.

Wherein the first curved portion is convexly curved in a direction in which the expansion portion is located, and the second curved portion is formed in such a manner that a space between the first curved portion and the expanded portion is located The convex curvature can be formed convexly in the direction opposite to the direction.

Wherein the plurality of electronic components includes a heating element, wherein the heating element includes an inductor, a transformer, a Zero-Voltage-Switching (ZVS) inductor, a switching module, and a diode module, And the ZVS (Zero-Voltage-Switching) inductor is vertically aligned with the first curve portion, and the ZVS (Zero-Voltage-Switching) inductor is vertically aligned with the first curve portion, And the switching module is arranged to correspond to the second curve portion in the vertical direction, and the diode module may be arranged to correspond to the extension portion in the vertical direction.

The inductor continuously controls the current flow, and the transformer controls the power by changing the voltage of the current. The ZVS (Zero-Voltage-Switching) inductor controls the light load , The switching module controls ON / OFF of the current, and the diode module can control the direction of the current.

The housing includes a side plate extending upward from the bottom plate and an upper cover disposed on the side plate, and the plurality of electronic parts can be disposed in a space formed by the bottom plate, the side plate, and the top cover.

A connector electrically connected to an external electronic device; an inlet port through which the cooling material flows into the flow passage; and a discharge port through which the cooling material is discharged from the flow passage, wherein the connector is disposed on the side plate, The outlet may be located on the opposite side of the connector and disposed on the side plate.

The housing includes a first sidewall extending downwardly from the bottom plate, a second sidewall extending downwardly from the bottom plate and spaced apart from the first sidewall, and a bottom wall disposed below the first sidewall and the second sidewall, And the flow path may be formed by the lower plate, the first sidewall, the second sidewall, and the lower cover.

The bottom surface of the flow path may be located on the bottom cover, and the side surface of the flow path may be located on the first side wall and the second side wall.

The vertical width of the flow path is defined by the shortest vertical distance between the bottom plate and the bottom cover and the horizontal width of the flow path can be defined by the shortest horizontal distance between the first side wall and the second side wall .

The DC-DC converter of the second embodiment includes a primary coil; A secondary coil generating an induced current by the primary coil; A first terminal and a second terminal extending from the secondary coil; An inductor coil connected to the second terminal to rectify a current; And a third terminal extending from the inductor coil, and the first terminal, the primary coil, the second terminal, the inductor coil, and the third terminal may be integrally formed.

The secondary coil may be connected to the first terminal at one end and may be connected to the second terminal at a position in which the plate including the upper surface and the lower surface forms an open ring.

The inductor coil may have a shape in which a plate including an upper surface and a lower surface is formed as a three-dimensional spiral.

The inductor coil may be in the form of an angular spiral including a plurality of corner portions.

At least one of the first terminal, the second terminal, and the third terminal may include at least one of a bent portion and a curved portion.

Current may flow in both directions to the first terminal, the secondary coil, the second terminal, the inductor coil, and the third terminal.

A first magnetic core in which the secondary coil is disposed, and a second magnetic core in which the inductor coil is disposed.

Further comprising a bus bar extending from the third terminal, the first terminal, the secondary coil, the second terminal, the inductor coil, the third terminal, and the bus bar Or may be integrally formed.

The DC-DC converter of the second embodiment includes a primary coil; A secondary coil and a tertiary coil generating an induction current by the primary coil; A first terminal and a second terminal extending from the secondary coil; A third terminal and a fourth terminal extending from the tertiary coil; A fifth terminal connected to the second terminal and the fourth terminal; An inductor coil extending from the fifth terminal to rectify a current; A sixth terminal extending from the inductor coil; And a bus bar extending from the sixth terminal, wherein the secondary coil, the first terminal, and the second terminal are integrally formed, and the tertiary coil, the third terminal, and the fourth terminal are integrally formed And the fifth terminal, the inductor coil, the sixth terminal, and the bus bar may be integrally formed.

Wherein the secondary coil is disposed on the primary coil, the tertiary coil is disposed beneath the primary coil, the secondary coil is electrically connected to the diode module by the first terminal, And the car coil may be electrically connected to the diode module by the third terminal.

The DC-DC converter of the third embodiment includes: a housing including a cooling plate; A cooling passage disposed on one surface of the cooling plate; An insulating layer disposed on the other surface of the cooling plate; A pattern layer disposed on the insulating layer; An electric element disposed on the pattern layer; And a substrate spaced apart from the cooling plate and electrically connected to the pattern layer.

The electric element includes an upper surface and a lower surface, and the lower surface of the electric element may be soldered to the pattern layer to face the cooling plate.

The cooling plate may be formed integrally with the housing.

A plurality of radiating fins may be formed on one surface of the cooling plate, and the radiating fins may be formed as protrusions extending to one side.

The first substrate and the second substrate may be electrically connected by soldering of signal legs or by press-fit method.

The signal leg may include: a first conducting member forming a part of the pattern layer; And a second conductive member curved or bent at the first conductive member and electrically connected to the substrate.

The signal leg may include: a first conducting member electrically connected to the pattern layer; And a second conductive member curved or bent at the first conductive member and electrically connected to the substrate.

The signal leg is electrically connected to the pattern layer, and includes a first conductive member in the form of a plate; And a second conductive member extending from the center of the first conductive member to the second substrate side and electrically connected to the substrate.

The signal leg may include a first conductive member forming a part of the pattern layer and having a groove formed at the center thereof in the form of a plate; And a second conductive member extending from the protruding portion toward the substrate and electrically connected to the substrate, wherein the protruding portion is formed in the groove of the first conductive member.

The housing having one side end and the other end opened, the housing including: a first cover covering the opening of the one end; And a second cover covering an opening of the other end portion.

The insulating layer may be coated on the other surface of the cooling plate.

The DC-DC converter of the third embodiment includes a first region in which a flow path of a cooling fluid is formed, a second region in which the electronic components are separated from the first region, and a cooling plate disposed between the first and second regions ; A main substrate spaced apart from the cooling plate and disposed in the second region; An insulating layer disposed on the cooling plate; A pattern layer disposed on the insulating layer; And an electric element disposed on the pattern layer.

In the DC-DC converter of the first embodiment, since the difference in the area of the vertical cross section in all portions of the flow path is within 10%, the flow rate of the cooling material is increased and the pressure drop width is reduced, . Further, electronic components (for example, a diode module) having a large heating value and a large area can be intensively cooled by matching with an extension portion (a portion having a large width and a small width) of the flow path.

The second embodiment provides a DC-DC converter including a secondary coil, an inductor coil, and a bus bar integrally formed by a casting process to increase a conversion efficiency and to provide a lightened coil module having a compact structure .

According to the third embodiment, the size of the electronic component assembly and the converter can be reduced by increasing the mounting rate of devices in the same space by using the stacked main and auxiliary substrates. Furthermore, by mounting an active element having a high heating value on an auxiliary substrate directly contacting the cooling plate, the cooling efficiency can be increased.

1 is a perspective view of the DC-DC converter of the first embodiment viewed from above.
2 is a perspective view of the DC-DC converter of the first embodiment in which the upper cover is exploded.
3 is a perspective view of the DC-DC converter of the first embodiment in which the upper cover and the protection plate are disassembled.
4 is a cross-sectional view of the DC-DC converter of the first embodiment with reference to line A-A '.
5 is a perspective view of the DC-DC converter of the first embodiment with the lower cover removed and viewed from below.
6 is a plan view of the DC-DC converter of the first embodiment with the lower plate removed.
7 is a plan view of the DC-DC converter of the first embodiment with the lower cover removed.
8 is a plan view and a side view of the lower cover of the first embodiment.
9 (1) shows the "vertical section" of the extension of the first embodiment, and FIG. 9 (2) shows the "vertical section" of the other part of the flow passage.
10 is a perspective view showing a DC-DC converter of a comparative example of the second embodiment.
11 is a perspective view showing the DC-DC converter of the second embodiment.
12 is a perspective view showing a state in which the coil module of the second embodiment is mounted on the first and second magnetic cores (the primary coil is omitted).
13 is a perspective view showing the coil module of the second embodiment (the primary coil is omitted).
14 is a perspective view showing a state in which the coil module of the modified example of the second embodiment is mounted on the first and second magnetic cores.
15 is an exploded perspective view showing a coil module according to a modification of the second embodiment.
16 is a perspective view showing the DC-DC converter of the third embodiment with the first cover removed.
17 is a cut-away perspective view showing the DC-DC converter of the third embodiment.
18 is a schematic cross-sectional view showing a main board, an auxiliary board and a cooling plate of the DC-DC converter of the third embodiment.
19 is a conceptual diagram showing a signal bridge of the DC-DC converter of the third embodiment.
20 is a schematic cross-sectional view showing a main board, an auxiliary board and a cooling plate of a DC-DC converter according to a modification of the third embodiment.

Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. In describing the components in the drawings, the same components are denoted by the same reference numerals whenever possible, even if they are displayed on other drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected, coupled, or connected to the other component, It is to be understood that another element may be "connected "," coupled ", or "connected" between elements.

≪ Embodiment 1 >

Hereinafter, "vertical direction" may mean upward and / or downward direction, and "horizontal direction" may mean any one of directions on a plane perpendicular to "vertical direction ". The " vertical direction "may be the longitudinal width direction of the flow path 200, and the" horizontal direction "may be the lateral width direction of the flow path 200. The "vertical section" may mean a section perpendicular to the moving direction of the cooling material, and the "horizontal section" may be a section perpendicular to the "vertical section ".

Hereinafter, the DC-DC converter 1 of the first embodiment will be described with reference to the drawings. FIG. 1 is a perspective view of the DC-DC converter of the first embodiment viewed from above, FIG. 2 is a perspective view of an upper cover of the DC-DC converter of the first embodiment, 4 is a cross-sectional view of the DC-DC converter of the first embodiment with reference to line A-A '. FIG. 5 is a cross-sectional view of the DC-DC converter of the first embodiment. 6 is a plan view of the DC-DC converter of the first embodiment with the lower plate removed, FIG. 7 is a plan view of the DC-DC converter of the first embodiment with the lower cover removed, and FIG. 9 is a plan view and a side view showing the lower cover of the first embodiment. Fig. 9 (1) shows the "vertical section" of the extension of the first embodiment, and Fig. 9 (2) Vertical cross-section "of FIG.

DC-DC converter 1000 can be used in a vehicle. For example, the DC-DC converter 1000 receives an electric current from an external power source device (such as a lithium ion battery), boosts or lowers the voltage, supplies the voltage to an external electronic device (such as a motor) It is possible to control the number of revolutions.

DC converter 1000 includes a housing 100, a flow path 200, a plurality of electronic components 300, an inlet 400, an outlet 500, a terminal 600, and one or more connectors 700 can do.

The housing 100 may be an exterior member of the DC-DC converter 1000. The flow path 200 may be formed in the housing 100. A plurality of electronic components 300 can be accommodated in the housing 100. A plurality of electronic components 300 may be disposed inside the lower plate 110 of the housing 100 and a flow path 200 may be located below the lower plate 110. [ The plurality of electronic components 300 can be cooled by the cooling material flowing along the flow path 200. The housing 100 may be connected to an inlet 400, an outlet 500, a terminal 600, and one or more connectors 700. The material of the housing 100 may include a plastic material and / or a metal material.

The housing 100 may include a lower plate 110, a side plate 120, a shroud 121, an upper cover 130, a lower cover 140, a first side wall 150 and a second side wall 160 .

The lower plate 110 may form a lower surface of the inner space of the housing 100. The lower plate 110 may be roughly in the form of a square plate. The side plate 120 may form a side surface of the inner space of the housing 100. The side plate 120 may extend upward from the edge of the lower plate 110. The housing 100 may be provided with an inner space whose upper surface is opened by the lower plate 110 and the side plate 120. A plurality of electronic components 300 can be accommodated in the inner space of the housing 100.

An inlet 400, an outlet 500, and a terminal 600 may be located at one side of the side plate 120. At least one connector 700 may be located on the other side of the side plate 120. In this case, the inlet 400, the outlet 500 and the terminal 600 may be located on the opposite side of the one or more connectors 700.

The protection plate 121 may be located in the inner space of the housing 100. The protection plate 121 may be disposed above the main substrate 310. The protection plate 121 may overlap with at least a part of the main substrate 310 in the vertical direction. That is, a part of the upper surface of the main substrate 310 may be covered by the protection plate 121. The protection plate 121 may be a cover member for protecting a specific portion of the main substrate 310. [

The upper cover 130 may be disposed on the side plate 120. The upper cover 130 and the side plate 120 can be fastened by screws. The upper cover 130 may be roughly in the form of a square plate. The inner space of the housing 100 can be closed by the upper cover 130 of the upper cover 130. The upper cover 130 may include a pattern portion 131 protruding upward in a lattice pattern at the center. The pattern unit 131 may function to protect the plurality of electronic components 300 accommodated in the inner space of the housing 100 by increasing the strength of the upper cover 130. The upper cover 130 may include a flange portion 132 protruding in the horizontal direction at an edge thereof. The flange portion 132 may be formed with a hole into which a screw is inserted in a plate form.

A flow path 200 may be formed in the lower plate 110. The flow path 200 may be positioned on the lower surface of the lower plate 110. The first sidewall 150 and the second sidewall 160 may be spaced horizontally from each other and may extend downward from the lower surface of the lower plate 110. The first sidewall 150 and the second sidewall 160 may be connected to each other at a point where the flow path 200 is connected to the inlet port 400 and the outlet port 500. The flow path 200 having the lower surface opened by the lower plate 110, the first sidewall 150, and the second sidewall 160 can be formed. The lower cover 140 may be located below the first sidewall 150 and the second sidewall 160 to close the open bottom.

That is, the flow path 200 can be formed by the lower surface of the lower plate 110, the inner surface of the first sidewall 150, the inner surface of the second sidewall 160, and the upper surface of the lower cover 140. In this case, the ceiling surface of the flow path 200 can be positioned on the lower surface of the lower plate 110, and both side surfaces of the flow path 200 are formed on the inner surface of the first side wall 150 and the inner surface of the second side wall 160 And the bottom surface of the flow path 200 may be positioned on the upper surface of the lower cover 140. [

The width a of the flow path 200 may be the shortest distance in the horizontal direction between the inner surface of the first sidewall 150 and the inner surface of the second sidewall 160. The vertical widths b and b 'of the flow path 200 may be the shortest distance in the "vertical direction" between the lower surface of the lower plate 110 and the upper surface of the lower cover 140. The vertical width a and a 'of the flow path 200 and the lateral width b and b' of the flow path 200 may be the longitudinal side and the lateral side of the vertical cross section 40 and 50 of the flow path 200 .

The cooling material flowing in the flow path 200 can absorb heat emitted from the plurality of electronic parts 300. In this case, heat transfer occurs through the lower plate 110, and a plurality of the electronic components 300 can be cooled.

The lower cover 140 may be in the form of a plate. The lower cover 140 may be positioned downwardly from the lower plate 110. The upper surface of the lower cover 140 and the lower surface of the lower plate 110 may be connected by the first sidewall 150 and the second sidewall 160. The lower cover 140 may include a protrusion 141 protruding from the upper surface to the upper side (the direction in which the lower plate of the housing is located). The protrusions 141 may be vertically aligned with the extensions 240 of the flow path 200. The transverse width a becomes larger on the "vertical cross section 40" of the extension portion 240, but the transverse width b can be reduced. Therefore, the area of the "vertical cross section 50" at the front end (upstream side) of the expanding part 240 and the extension part 240 and the rear end (downstream side) (See Fig. 9). As a result, the pressure difference of the cooling substance becomes large, and the flow velocity is slowed, thereby preventing the cooling efficiency from being deteriorated.

The lower cover 140 may be in the form of a plate. The lower cover 140 may include a first sealing portion 142 and a second sealing portion 143. The material of the first sealing part 142 and the second sealing part 143 may include a sealing material such as rubber. The first sealing portion 142 and the second sealing portion 143 may protrude downward from the lower surface of the lower cover 140. The first sealing portion 142 and the second sealing portion 143 may be spaced apart from each other in the "horizontal direction" (transverse direction of the flow passage).

The first sealing portion 142 may overlap the first side wall 150 in a "vertical direction ". The first sealing portion 142 can contact the lower surface of the first side wall 150. The first sealing portion 142 may have a shape corresponding to the first side wall 150.

The second sealing portion 143 may overlap the second side wall 160 in a "vertical direction ". The second sealing portion 143 may contact the lower surface of the second side wall 160. The second sealing portion 143 may have a shape corresponding to the second side wall 160.

The first sealing portion 142 may function to close the gap between the lower cover 140 and the first side wall 150 and the second sealing portion 143 may function to close the gap between the lower cover 140 and the second side wall 150. [ (Not shown).

The first sealing portion 142 and the second sealing portion 143 are formed at a position where the flow path 200 is connected to the inlet port 400 and the outlet port 500 in the same manner as the first side wall 150 and the second side wall 160 They may be connected to each other.

The lower cover 140 may be fastened to the first side wall 150 and the second side wall 160 by screws. The lower cover 140 may include a guide hole 144. A guide protrusion 111 projecting downward from the lower plate 110 is inserted into the guide hole 144 to guide the lower cover 140. The lower cover 140 may include a flange portion 145. The flange 145 of the lower cover 140 may be formed with a hole into which the screw is inserted.

The flow path 200 may be formed in the housing 100. The flow path 200 may be located at one side of the housing 100. The flow path 200 may be positioned below the lower plate 110 of the housing 100. Therefore, the lower plate 110 of the housing 100 may be a "cooling plate ". The flow path 200 may be connected to the inlet 400. The flow path 200 may be connected to the discharge port 500. The most upstream of the flow path 200 may be connected to the inlet 400 to receive the cooling material. The downstream end of the flow path 200 may be connected to the discharge port 500 to discharge the cooling material. The cooling material flows along the flow path 200 and can cool the heat generated by the plurality of electronic parts 300. [ Various types of heat exchange fluids (e.g., cooling water) may be used for the cooling material.

The flow path 200 may be formed by a lower plate 110, a first side wall 150, a second side wall 160, and a lower cover 140. The bottom surface of the flow path 200 may be positioned on the upper surface of the lower cover 140. That is, the upper surface of the lower cover 140 may be the bottom surface of the flow path 200. The ceiling of the channel 200 may be positioned on the lower surface of the lower plate 110. That is, the lower surface of the lower plate 110 may be a ceiling surface of the flow path 200. Both side surfaces of the flow path 200 may be located on the inner surfaces of the first side wall 150 and the second side wall 160, respectively. That is, the inner side surfaces of the first sidewall 150 and the second sidewall 160 may be both sides of the flow path 200.

The width a of the flow path 200 can be defined by the shortest distance in the "horizontal direction" between the inner surface of the first side wall 150 and the inner surface of the second side wall 160, 200 can be defined by the shortest distance in the "vertical direction" between the lower surface of the lower plate 110 and the upper surface of the lower cover 140. The widths a and a 'of the flow path 200 and the lengths b and b' of the flow path 200 may vary along the moving direction of the cooling material. The lateral width a of the flow path 200 in the expansion portion 240 is set to be greater than the lateral width a 'of the front end (upstream side of the expanded portion) or the rear end (downstream side of the expanded portion) . The vertical width b of the flow path 200 in the expansion part 240 is greater than the vertical width b 'of the front end (upstream side of the expansion part) or the rear end (downstream side of the expansion part) Can be small.

The flow path 200 may include an inlet 210, a first curve 220, a second curve 230, an extension 240, and an outlet 250. The upstream of the inlet 210 may be connected to the inlet 400. The downstream portion of the discharge portion 250 may be connected to the discharge port 500. The downstream of the inlet 210 may be connected to the upstream of the first curve 220 and the downstream of the first curve 220 may be connected to the upstream of the second curve 230, The downstream portion of the expansion portion 230 may be connected to the upstream portion of the expansion portion 240 and the downstream portion of the expansion portion 240 may be connected to the upstream portion of the exhaust portion 250. Accordingly, the cooling material introduced from the inlet 400 sequentially moves the inlet 210, the first curved portion 220, the second curved portion 230, the extension portion 240, and the outlet portion 250 , And through the outlet (500).

The inlet 210 and the outlet 250 may be disposed adjacent to each other. The inlet portion 210 and the outlet portion 250 may be disposed in parallel with each other. The inlet portion 210 and the outlet portion 250 may be spaced apart in the "horizontal direction" (width direction of the flow path). The first curve portion 220 and the extension portion 240 may be disposed adjacent to each other. The first curve portion 220 and the extension portion 240 can be spaced apart in the "horizontal direction" (width direction of the flow path). The second curve 230 may be a point at which the flow direction of the cooling water in the flow path 200 is completely inverted (turn-up or U-turn). The second curve portion 230 may be formed in a "U-shaped" shape. One end of the second curved portion 230 may be connected to the first curved portion 220. The other end of the second curved portion 230 may be connected to the extending portion 240. The second curve portion 230 may connect the first curve portion 220 and the extension portion 240. The direction of movement of the cooling material in the inlet portion 210 and the outlet portion 250 disposed in parallel may be reversed by the second curved portion 230.

The first curved portion 220 may have a convex curvature in a direction in which the extending portion 240 is located. The shortest "horizontal" distance between the first curve 220 and the extension 240 may be less than the shortest "horizontal" distance between the inlet 210 and the outlet 250. The curvature of the second curved portion 230 may be convex (U-shaped) in the opposite direction in which the inlet portion 210 and the outlet portion 250 are located. The extension portion 240 may be curved convexly in the "horizontal direction ". The width a of the flow path 200 in the expansion portion 240 may be greater than the width a 'of another portion of the flow path 200 (for example, ).

In the first embodiment, the inlet portion 210, the first curve portion 220, the second curve portion 230, the extension portion 240, and the discharge portion 250 are formed in the flow path 200, (320).

The plurality of heating elements 320 includes an inductor 321, a transformer 322, a Zero-Voltage-Switching (ZVS) inductor 323, a switching module 324 and a diode module 325, The first curved portion 210 may be arranged to correspond to the inductor 210 in the vertical direction (the longitudinal direction of the flow path), and the first curved portion 220 may be disposed to correspond to the transformer 220 in the vertical direction, The second curve portion 230 may be disposed vertically with respect to the ZVS inductor 323 and the second curved portion 230 may be perpendicular to the switching module 324 and the vertical portion of the ZVS inductor 323, And the extension portion 240 may be disposed so as to be vertically aligned with the diode module 240 (see FIG. 7).

In this case, the first curved portion 220 is formed in a direction in which the expansion portion 240 is located so as to efficiently cool the transformer 322 having a larger "horizontal area" than the inductor 321 (to cool the center portion of the transformer) The curvature is formed convexly.

In addition, the expansion portion 240 has a larger "horizontal area" than other portions of the flow path 200 in order to efficiently cool the diode module 325 having a high heating value. The extension portion 240 is disposed between the transformer 322 and the diode module 325 as well as the diode module 325 by a wide "horizontal area" to electrically connect the conductive members 326 ) Can also be cooled. To this end, the maximum "horizontal area" (10, the largest area of the horizontal area of the extension) of the extension 240 is the largest "horizontal area" of the diode module 325 Or more than 90% The area 30 that overlaps the diode module 325 in the "vertical direction" at the maximum "horizontal area" 10 of the extension 240 can be 30% or more.

On the other hand, the flow path 200 of the first embodiment is characterized in that the "vertical cross section 50" is uniform along the moving direction of the cooling material. The difference between the largest portion and the smallest portion of the area of the "vertical cross section 50" of the flow passage 200 may be within 10% or less. The area of the "vertical cross section 50" of the flow passage 200 may be the same along the moving direction of the cooling material. As a result, the flow rate of the cooling material can be increased and the pressure drop width can be reduced to improve the cooling efficiency.

The width a of the flow path 200 is increased in the expansion part 240, so that the diode module 325 can be efficiently cooled. As a result, the area of the "vertical cross section 40" in the expansion section 240 can be larger than the area of the "vertical cross section 50" This can be arranged with the intention of the first embodiment to equalize the "vertical cross section 50" of the flow passage 200. [

In order to solve this problem, in the first embodiment, the vertical width "b" of the "vertical cross section 40" in the expansion section 240 is defined as "vertical cross section" (B ') of " As a result, the area of the "vertical cross section 40" of the expansion section 240 may be the same as or similar to the area of the "vertical cross section 50"

To this end, the protrusion 141 may be positioned on the bottom surface of the extension 240. That is, the protrusion 141 may be positioned at a position corresponding to the "vertical direction" with the extension 240 in the lower cover 140. As a result, the vertical width b of the extended portion 240 can be increased while maintaining the height of the first sidewall 150 and the second sidewall 160.

The protrusion 141 may protrude from the bottom surface of the expansion portion 240 in a direction in which the lower plate 110 is positioned. The protruding height of the protruding portion 141 may increase and decrease along the moving direction of the cooling material. The "vertical cross section" of the projection 141 may be a rectangular shape (see Fig. 8 (A)). The area of the "vertical cross section" of the protruding portion 141 may increase and decrease along the moving direction of the cooling material. The "horizontal cross section" of the projection 141 may be a shape in which the curvature is convex in the direction in which the lower plate 110 is located (see FIG. 8 (B)). The area of the "horizontal cross section" of the protruding portion 141 can be reduced toward the edge from the center of the width a of the enlarged portion 240.

The discharge portion 250 may include an inclined portion 251. The slope portion 251 may be positioned between the discharge portion 250 and the discharge port 500. The inclined portion 251 may be located at the downstream of the discharge portion 250. In the inclined portion 251, the bottom surface of the flow path 200 may be inclined upward toward the downstream side.

The plurality of electronic components 300 may be located in the inner space of the housing 100. The plurality of electronic components 300 may be disposed on the lower plate 110 (cooling plate). Below the lower plate 110 (cooling plate), a flow path 200 through which the cooling material flows can be formed to cool the heat generated by the plurality of electronic components 300.

The plurality of electronic components 300 may include a main substrate 310, a plurality of heating elements 320, a first auxiliary substrate 330, and a second auxiliary substrate 340.

The main board 320 may be disposed on the lower plate 110. The main board 320 may be spaced apart from the upper plate 110 by a predetermined distance. Various electronic component chips may be mounted on the main board 320. A circuit for connecting various electronic component chips may be formed on the main substrate 320. The main substrate 320 may be electrically connected to the first auxiliary substrate 330 and the second auxiliary substrate 340.

One of the plurality of heating elements 320 may overlap in the "vertical direction" with the extending portion 240. The maximum "horizontal area" 10 of the extension 240 may be at least 90% of the maximum "horizontal area" 20 of one of the plurality of heating elements 320 overlapping & The area 30 overlapping in the " vertical direction "with one of the plurality of heating elements 320 overlapping in the" vertical direction "at the maximum" horizontal area "10 of the extension part 240 may be 30% or more. In this case, among the plurality of heating elements 320, the heating elements overlapping in the "vertical direction" with the extending portions 240 may be the diode module 325.

The plurality of heating elements 320 includes an inductor 321, a transformer 322, a ZVS (zero-voltage-switching) inductor 323, a switching module 324, a diode module 325, and a conductive member 326 .

The inductor 321, the transformer 322 and the ZVS (Zero-Voltage-Switching) inductor 323 may be disposed on the upper surface of the lower plate 110. The switching module 324 may be mounted on the first auxiliary substrate 330. The diode module 325 may be mounted on the second auxiliary substrate 340. The conductive member 326 may be a member that electrically connects the transformer 322 and the diode module 325.

The inductor 321, the transformer 322, and the ZVS (Zero-Voltage-Switching) inductor 323 may be electrically connected to the main board 320 by a conductive member. The main board 320 may not be disposed in a portion where the inductor 321, the transformer 322, and the ZVS (zero-voltage-switching) inductor 323 are disposed in the lower plate 110.

The inductor 321 can perform the smoothing of the current and the function of reducing the ripple current. Further, the current flow can be made continuous. That is, the inductor 321 can perform a rectifying function. The inductors 321 may be disposed so as to correspond to the inlet 210 of the flow path 200 in a "vertical direction ".

The transformer 322 can perform the function of boosting or reducing the current. The transformer 322 can perform a function of converting power. The transformer 322 may be disposed to correspond to the first curve portion 220 of the flow passage 200 in a "vertical direction ".

ZVS (Zero-Voltage-Switching) inductor 323 can control a light load. That is, it may be an auxiliary inductor for improving light load efficiency. ZVS (Zero-Voltage-Switching) inductor 323 may be disposed in a "vertical direction" corresponding to the front end of the second curve portion 230.

The switching module 324 can control ON / OFF of the current. Further, the switching module 324 can be integrated with the transformer 322 to decompress the input DC and output it. The switching module 324 may be disposed to correspond to the second curve portion 230 in "vertical direction ".

The diode module 325 can control the direction of the current. That is, the diode module 325 can perform the function of moving the current in a specific direction. The diode module 325 may be disposed in a "vertical"

The conductive member 326 can electrically connect the transformer 322 and the diode module 325.

The first auxiliary substrate 330 and the second auxiliary substrate 340 may be positioned below the main substrate 310. The first auxiliary substrate 330 and the second auxiliary substrate 340 may be spaced apart from the main substrate 310. The first auxiliary substrate 330 and the second auxiliary substrate 340 may be disposed between the lower substrate 110 and the main substrate 310. The first auxiliary substrate 330 and the second auxiliary substrate 340 may be electrically connected to the main substrate 310 by a separate conductive member. A switching module 324 may be mounted on the first auxiliary substrate 330. A diode module 325 may be mounted on the second auxiliary substrate 340.

The inlet port 400 and the outlet port 500 may be located at one side of the side plate 120 of the housing 100. The external cooling material may flow into the flow path 200 through the inlet port 400. The cooling material may be discharged from the flow path 200 through the outlet 500.

The terminal 600 may be located at one side of the side plate 120 of the housing 100. The terminal 600 may be located between the inlet 400 and the outlet 500. An external power supply may be electrically connected to the terminal 600. That is, an external current can be supplied to the plurality of electronic components 300 through the terminal 600. [

The one or more connectors 700 may be located on the other side of the side plate 120 of the housing 100. The one or more connectors 700 may be located on the opposite side of the inlet 400 and the outlet 500. The one or more connectors 700 may be electrically connected to an external electronic component (e.g., an electric motor).

≪ Embodiment 2 >

Hereinafter, a DC-DC converter 2001 according to a comparative example of the second embodiment will be described with reference to the drawings. 10 is a perspective view showing a DC-DC converter of a comparative example of the second embodiment.

The DC-DC converter 2001 of this comparative example may be a DC-DC converter used in a vehicle. For example, the DC-DC converter 2001 receives an electric current from an external power supply device (such as a lithium ion battery), boosts or lowers the voltage, supplies the voltage to an external electronic device (such as a motor) It is possible to control the number of revolutions. The DC-DC converter 2001 may include a case 2010, a conversion unit 2020, an inductor unit 2030, a bus bar (not shown), and an external terminal 2050.

The case 2010 may be an external member of the DC-DC converter 2001. [ In the case 2001, an internal space is formed to accommodate the conversion unit 2020, the inductor unit 2030, and a bus bar (not shown). The case 2010 may include first, second, third, fourth, and fifth case terminals 2010a, 2010b, 2010c, 2010d, 2010e, and an external terminal 2050. [

The converting unit 2020 may include a primary coil 2021 and a secondary coil 2022 disposed apart from the primary coil 2021. A current supplied from an external power supply unit flows through the primary coil 2021 and an electromagnetic interaction with the primary coil 2021 is performed by the secondary coil 2022 to output the converted current. The primary coil 2021 is electrically connected to the first and second case terminals 2010a and 2010b to receive a current from an external power supply device. The secondary coil 2022 may be electrically connected to the third, fourth, and fifth case terminals 2010c, 2010d, and 2010e. In this case, the third case terminal 2010c and the fourth case terminal 2010d may be electrically connected to the diode module. Accordingly, the secondary coil 2022 can be electrically connected to the diode module. In addition, the fifth case terminal 2010e may be electrically connected to the inductor unit 2030.

The inductor unit 2030 may include an inductor coil 2031. [ The inductor coil 2031 may be in the form of a solid spiral. These three-dimensional spirals are sometimes referred to as "screw spirals". The start portion of the inductor coil 2031 may be electrically connected to the fifth case terminal 2010e. The starting portion of the inductor coil 2031 may be electrically connected to the secondary coil 2022 at the fifth case terminal 2010e. The end of the inductor coil 2031 may be electrically connected to the external terminal 2050 through a bus bar (not shown). The inductor coil 2031 can be supplied with the converted current output from the secondary coil 2022. [ Further, the inductor coil 2031 can rectify the converted current output from the secondary coil 2022. [ Further, the current rectified by the inductor coil 2031 can be supplied to the external terminal 2050.

When the current is supplied from the external power supply to the primary coil 2021, the secondary coil 2022 can output the boosted or dropped converted current. The converted current output from the secondary coil 2022 can be rectified in the inductor coil 2031. [ The rectified current may be supplied to an external electronic device (e.g., a motor) through the external terminal 2050. [ In this case, the secondary coil 2022 may be electrically connected to one side of the external terminal 2050 through the third case terminal 2010c. The secondary coil 2022 may be electrically connected to the other end of the external terminal 2050 through the fifth case terminal 2010e, the inductor coil 2031, and the bus bar 2040. Accordingly, a current generated in the secondary coil 2022 can be rectified in the inductor coil 2031 to form a circuit that is supplied to an external electronic device. As a result, the external electronic device connected to the external terminal 2050 is converted in the secondary coil 2022, and can be supplied with the rectified current from the inductor coil 2031. [

In the comparative example of the second embodiment, the secondary coil 2022, the inductor coil 2031, and the bus bar (not shown) are electrically connected to each other, but are made of respective single members. Thereafter, the secondary coil 2022 and the inductor coil 2031 are bolted together at the fifth case terminal 2010e to be electrically connected. In addition, the inductor coil 2031 and the bus bar (not shown) may also be bolted together and electrically connected. A gap may be generated in this fastening process, which leads not only to deterioration of electrical characteristics but also to an increase in contact resistance, so that the conversion efficiency of the DC-DC converter 2001 can be lowered. In order to manufacture each of the secondary coil 2022 and the inductor coil 2031, a complex manufacturing process such as sheet press cutting, bolt hole pulling, bending, forging, and the like is required. As a result, there is a problem in terms of production efficiency.

Hereinafter, the DC-DC converter 2100 of the second embodiment will be described with reference to the drawings. FIG. 11 is a perspective view showing the DC-DC converter according to the second embodiment, FIG. 12 is a perspective view showing a state in which the coil module of the second embodiment is mounted on the first and second magnetic cores 13 is a perspective view showing the coil module of the second embodiment (the primary coil is omitted).

The DC-DC converter 2100 of the second embodiment includes a case 2110, a conversion section 2120, an inductor section 2130, a bus bar 2140, and a first external terminal 2150 . The secondary coil 2122 of the converting unit 2120, the first and second terminals 2123 and 2124 and the inductor coil 2131 of the inductor unit 2130, the third terminal 2132 and the bus bar 2140 ) May be referred to as a "coil module ". Among the "coil module ", the first, second and third terminals 2123, 2124 and 2132 and the bus bar 2140 can be omitted by a design request as a conductive member for electrical connection. The secondary coil 2122, the first and second terminals 2123 and 2124, the inductor coil 2131, the third terminal 2132 and the bus bar 2140 are integrally fabricated by casting . That is, the secondary coil 2122, the first and second terminals 2123 and 2124, the inductor coil 2131, the third terminal 2132, and the bus bar 2140 can be integrally formed in the "coil module" have.

The DC-DC converter 2100 of the second embodiment has the secondary coil 2122, the inductor coil 2131, and the bus bar 2140 as compared with the DC-DC converter 2010 of the comparative example. Quot; casting "may be made in one piece. That is, the secondary coil 2122, the inductor coil 2131, and the bus bar 2140 may be integrally formed. Therefore, complicated processes such as sheet press cutting, bolt hole punching, bending, and forging for manufacturing the secondary coil 2122 and the inductor coil 2131 can be omitted. In addition, bolt fastening for connecting the secondary coil 2122 and the inductor coil 2131 can be omitted. In addition, the bolt fastening for connecting the inductor coil 2131 and the bus bar 2140 can be omitted (as a result, the fifth case terminal 2010e of the comparative example for bolt fastening can be omitted). In such an integral type coil module, there is no gap that can be caused by the bolt fastening because bolt fastening is not necessary. As a result, the problem of the bolt fastening described above does not occur, and the conversion efficiency of the DC-DC converter 2100 can be increased.

The case 2110 may be an exterior member of the DC-DC converter 2100. An internal space is formed in the case 2110 to accommodate the conversion unit 2120, the inductor unit 2130, and the bus bar 2140. First, second, and third case terminals 2110a, 2110b, and 2110c and a first external terminal 2150 may be formed in the case 2110. [

The converting unit 2120 can receive a current from an external power supply device. The converting unit 2120 can convert and output an external current. The conversion unit 2120 may include a primary coil 2121, a secondary coil 2122, a first terminal 2123, a second terminal 2124, and a first magnetic core 2125.

The primary coil 2121 can receive current from the external power supply device. The primary coil 2121 is in the form of a three-dimensional spiral, and the beginning of the spiral growth can be electrically connected to the first case terminal 2100a by the conductive member. The end of the spiral growth of the primary coil 2121 may be electrically connected to the second case terminal 2100b by a conductive line. The first and second case terminals 2100a and 2100b may be electrically connected to an external power source device. As a result, a current supplied from the external power supply device can flow through the primary coil 2121. In the present embodiment, the primary coil 2121 is a three-dimensional spiral having a curved shape, but the shape of the spiral of the primary coil 2121 is not limited thereto.

The secondary coil 2122 may be a component of a "coil module ". The secondary coil 2122 may be disposed apart from the primary coil 2121. The secondary coil 2122 may be disposed on the upper side of the primary coil 2121. The secondary coil 2122 can perform an electromagnetic interaction with the primary coil 2121. In the secondary coil 2122, a current is induced by the current of the primary coil 2121, and an induced current can be generated. The induced current generated in the secondary coil 2122 may be a current that is boosted or lowered by the current flowing through the primary coil 2121.

The secondary coil 2122 may be in the form of a plate comprising an upper surface and a lower surface to form an open ring. The beginning (one end) of the secondary coil 2122 may be in the form of extending from the first terminal 2123. The other end of the secondary coil 2122 may be connected to the second terminal 2124. That is, one end of the secondary coil 2122 may be electrically connected to the first terminal 2123, and the other end of the secondary coil 2122 may be electrically connected to the second terminal 2124. The secondary coil 2122 and the first and second terminals 2123 and 2124 may be integrally formed. However, the shape of the secondary coil 2122 is not limited to the ring shape described above. For example, the secondary coil 2122 may be arranged in a three-dimensional helical shape, spaced vertically or horizontally from the primary coil 2121. In addition, the secondary coil 2122 may be interleaved in a three-dimensional spiral shape while being spaced apart from the primary coil 2121. In this case, the primary and secondary coils 2121 and 2122 can form one double-layered spiral.

The first terminal 2123 may be a component of a "coil module ". The first terminal 2123 may be a member for electrically connecting the secondary coil 2122 to an external terminal. The first terminal 2123 may be a plate-shaped conductive member. The first terminal 2123 may be in the form of extending from top to bottom (vertical direction). One end of the first terminal 2123 may be located at the top. The other end of the first terminal 2123 may be located at the lower portion. One end of the first terminal 123 may be curved or bent and extended in the vertical direction at the beginning of the secondary coil 2122. The other end of the first terminal 2123 may be curved or bent in the horizontal direction and then divided into first and second terminal portions 2123a and 2123b described later. According to the above description, the first terminal 2123 may include at least one of a bent portion and a curved portion. In this case, the bent or curved angle of the bent portion or the bent portion may be right angled.

One end of the first terminal 2123 may be electrically connected to the beginning of the secondary coil 2122. The other end of the first terminal 2123 can be divided into a first terminal portion 2123a and a second terminal portion 2123b. The first terminal portion 2123a may be electrically connected to the third case terminal 2100c by bolting. Therefore, a hole for bolt fastening may be formed on the first terminal portion 2123a. And the second terminal portion 2123b may be electrically connected to the fourth case terminal 2110d by bolting. Therefore, a hole for fastening the bolt may be formed on the second terminal portion 2123b. The third case terminal 2110c and the fourth case terminal 2100c may be electrically connected to a diode module (not shown). Accordingly, the secondary coil 2122 can be electrically connected to the diode module through the first terminal 2123. [

Second terminal 2124 may be a component of a "coil module ". The second terminal 2124 may extend from the secondary coil 2122. The second terminal 2124 may be a member for electrically connecting the secondary coil 2122 and the inductor coil 2131. The second terminal 2124 may be a plate-shaped conductive member. The second terminal 2124 may be shaped to extend from the top down (vertical direction) and then extend in the inductor coil 2131 direction (horizontal direction). One end of the second terminal 2124 may be curved or bent and extended in the vertical direction at the end of the secondary coil 2122. The middle portion of the second terminal 2124 may be curved or bent and extended in the direction of the inductor coil 2131 (horizontal direction). The other terminal of the second terminal 2124 may be connected to the beginning of the inductor coil 2131. According to the above description, the second terminal 2124 may include at least one of a bent portion and a curved portion. In this case, the bent or curved angle of the bent portion or the bent portion may be right angled.

One end of the second terminal 2124 may be electrically connected to the end of the secondary coil 2122. The other terminal of the second terminal 2124 may be electrically connected to the start portion of the inductor coil 2131. In summary, the current generated in the secondary coil 2122 can be supplied to the inductor coil 2131 through the second terminal 2124.

A primary coil 2121 and a secondary coil 2122 may be disposed in the first magnetic core 2125. [ The first magnetic core 2125 may be a ferromagnetic member that collects magnetic field lines of the primary coil 2121 and the secondary coil 2122 to increase the strength of the magnetic field. The first magnetic core 2125 may include a first bobbin portion 2125a and a first support portion 2125b. The first support portion 2125b is formed in the form of a block having an inner space at the center and a first bobbin portion 2125a is formed in the inner space to support the primary coil 2121. [ The primary winding 2121 and the secondary winding 2122 may be wound around the first bobbin portion 2125a. The outer surface of the first magnetic core 2125 may be coated with an insulator. The first magnetic core 2125 may have various forms by design request.

The inductor unit 2130 can rectify the current generated in the converting unit 2120. The inductor unit 2130 may include an inductor coil 2131, a third terminal 2132, and a second magnetic core 2133.

The inductor coil 2131 may be a component of a "coil module ". The inductor coil 2131 can receive the converted current from the secondary coil 2122. [ The inductor coil 2131 can rectify the converted current. The inductor coil 2131 may be connected to the first external terminal 2150 to supply a rectified current.

The inductor coil 2131 may have a shape in which the plate including the upper surface and the lower surface is formed as a three-dimensional spiral. That is, the inductor coil 2131 may be in the form of a three-dimensional spiral, and the beginning (bottom) of the spiral growth may be electrically connected by the second terminal 2124 and the secondary coil 2122. That is, the inductor coil 2131 may extend from the other end of the second terminal 2124. An end portion (upper portion) of the spiral growth of the inductor coil 2131 can be electrically connected to the first external terminal 2150 by the bus bar 2140. In this embodiment, the inductor coil 2131 is a three-dimensional spiral having a curved shape. However, the shape of the inductor coil 2131 is not limited thereto.

The third terminal 2132 may be a component of a "coil module ". The third terminal 2132 may be a member for electrically connecting the inductor coil 2131 to an external terminal. The third terminal 2132 may be a plate-shaped conductive member. The third terminal 2132 may be in the form of extending from top to bottom (vertical direction). One end of the third terminal 2132 may be located at the top. And the other end of the third terminal 2132 may be positioned below. One end of the third terminal 2132 may be bent or bent in the horizontal direction of the inductor coil 2131 (opposite to the horizontal spiral growth direction) at the end of the inductor coil 2131. Then, one end of the third terminal 2132 may be curved or bent and extended in a vertical direction (top to bottom). The other end of the third terminal 2132 may be curved or bent in the horizontal direction (the direction of the bus bar 2140) and then connected to the bus bar 2140. According to the above description, the third terminal 2132 may include at least one of a bent portion and a curved portion. In this case, the bent or curved angle of the bent portion or the bent portion may be right angled.

One end of the third terminal 2132 may be electrically connected to the end of the inductor coil 2131. The other terminal of the third terminal 2132 may be electrically connected to the bus bar 2140. Thus, the inductor coil 2131 can be electrically connected to the bus bar 2140 through the third terminal 2132. [ The bus bar 2140 is electrically connected to the external terminal 2150 so that the inductor coil 2131 can be electrically connected to the external terminal 2150 through the third terminal 2132 and the bus bar 2140 have.

The second magnetic core 2133 may be provided with an inductor coil 2131. The second magnetic core 2133 may be a ferromagnetic member that collects magnetic field lines of the inductor coil 2131 to increase the strength of the magnetic field. The second magnetic core 2133 may include a second bobbin portion 2133a and a second support portion 2133b. The first support portion 2133b is in the form of a block having an inner space at the center, and a second bobbin portion 2133a is formed in the inner space to support the inductor coil 2131. [ The inductor coil 2131 may be wound around the second bobbin portion 2133a. The outer surface of the second magnetic core 2133 may be coated with an insulator. The second magnetic core 2133 may have various forms depending on the design request.

Bus bar 2140 may be a component of a "coil module ". The bus bar 2140 may be in the form of an elongated plate extending toward the external terminal 2150 side. One end of the bus bar 2140 may be electrically connected to the other end of the third terminal 2132. The other end of the bus bar 2140 may be electrically connected to the first external terminal 2150. In this case, the other end of the bus bar 2140 and the first external terminal 2150 may be bolted together. To this end, a third terminal portion 2140a may be formed at the other end of the bus bar 2140. Further, a bolt hole may be formed in the third terminal portion 2140a. Therefore, the rectified current of the inductor coil 2131 can be supplied to the external terminal 2150 through the third terminal 2132 and the bus bar 2140.

The external terminal 2150 can be connected to an external electronic device (e.g., a vehicle motor). An external electronic device is connected to the external terminal 2150 to receive a current. Therefore, the external electronic device is converted in the secondary coil 2122, and can be supplied with the current rectified by the inductor coil 2131. [ That is, the external electronic device can be supplied with the rectified current converted to the rated voltage through the secondary coil 2122, and the noise is filtered through the inductor coil 2131.

Current can flow in both directions in the first terminal 2123, the secondary coil 2122, the second terminal 2124, the inductor coil 2131, the third terminal 2132, and the bus bar 2140 described above. Therefore, for example, when the electric vehicle travels downhill and the external electronic device (motor) generates electric current like a generator, the first terminal 2123, the second terminal 2124, the inductor coil 2131, And may be supplied to the secondary coil 122 through the terminal 2132 and the bus bar 2140. [ In this case, an induction current is generated in the primary coil 2121 so that the external power source device (lithium ion battery) can be charged.

As described above, in the "coil module" of the second embodiment, at least one of the first terminal 2123, the second terminal 2124, and the third terminal 2132 includes at least one of a bent portion or a curved portion can do. The "coil module" is compact and has a stable support structure.

On the other hand, the plates constituting the "coil module" for a vehicle are flat and wide plates including an upper surface and a lower surface. This is because it is necessary to have a large resistance value in order to cover the electric capacity supplied to various electronic parts of the vehicle. However, when the bending part or the bending part is formed by bending molding as in the comparative example, the bending part or the bending part is inevitably worn, tarnished or distorted due to the shape of the plate and the characteristics of the molding process. This is undesirable because of the degradation of electrical properties and durability of the "coil module ".

However, since the first terminal 2123, the second terminal 2124 and the third terminal 2132 of the " coil module "according to the second embodiment are formed by" casting " A bent portion or a curved portion can be formed. Therefore, the "coil module" of the second embodiment can have a compact and stable supporting structure, and can improve the electrical characteristics and durability.

Hereinafter, a modification of the second embodiment will be described with reference to the drawings. FIG. 14 is a perspective view showing a state in which the coil module according to a modification of the second embodiment is mounted on the first and second magnetic cores, and FIG. 15 is an exploded perspective view showing a coil module according to a modification of the second embodiment.

The modification of the second embodiment is different from the second embodiment in the "coil module ". The modification of the second embodiment has substantially the same technical idea as that of the second embodiment other than the above differences. Therefore, the second embodiment can be applied to the modified example of the second embodiment. Hereinafter, description of portions having substantially the same technical ideas as those of the second embodiment will be omitted.

The "coil module" in the modification of the second embodiment may include a conversion section, an inductor section and a bus bar. In this case, the conversion unit includes the primary coil 2121-1, the secondary coil 2122-1, the tertiary coil 2122-2, the first terminal 2123-1, the second terminal 2124-1, A third terminal 2124-2 and a fourth terminal 2123-2. The inductor unit may include an inductor coil 2131-1, a fifth terminal 2133-1, and a sixth terminal 2132-1. In the modified example of the second embodiment, the point where the induction current flows by the primary coil is a total of two points including the secondary coil and the tertiary coil.

The primary coil 2121-1 can receive current from the external power supply device. The primary coil 2121-1 is in the form of a three-dimensional spiral, and the beginning of the spiral growth can be electrically connected to the first case terminal 2100a by the conductive member. The end of the spiral growth of the primary coil 2121-1 can be electrically connected to the second case terminal 2100b by the conductive line.

The secondary coil 2122-1 may be disposed apart from the primary coil 2121-1. The secondary coil 2122-1 may be located above the primary coil 2121-1. The secondary coil 2122-1 can perform an electromagnetic interaction with the primary coil 2121-1. In the secondary coil 2122-1, a current is induced by the current of the primary coil 212-11 and an induced current can be generated. The induced current generated in the secondary coil 2122-1 may be a current that flows through the primary coil 2121-1 or that is a step-down or step-down current.

The secondary coil 2122-1 may be of a shape in which the plate including the upper surface and the lower surface forms an open ring. (One end) of the secondary coil 2122-1 may be in a form extending from the first terminal 2123-1. In addition, an end portion (the other end) of the secondary coil 2122-1 may be connected to the second terminal 2124-1. That is, one end of the secondary coil 2122-1 may be electrically connected to the first terminal 2123-1, and the other end of the secondary coil 2122-1 may be electrically connected to the second terminal 2124-1 Can be connected. The secondary coil 2122-1 and the first and second terminals 2123-1 and 2124-1 may be integrally formed. However, the shape of the secondary coil 2122-1 is not limited to the ring shape described above. For example, the secondary coil 2122-1 may be arranged in a three-dimensional helical shape, spaced vertically or horizontally from the primary coil 2121-1. Further, the secondary coil 2122-1 may be interleaved in a three-dimensional spiral shape while being spaced apart from the primary coil 2121-1. In this case, the primary and secondary coils 2121-1 and 2122-1 can form one double-stranded spiral.

The first terminal 2123-1 may be a member for electrically connecting the secondary coil 2122-1 to the terminal. The first terminal 2123-1 may be a plate-shaped conductive member. The first terminal 2123-1 may be in the form of extending from top to bottom (vertical direction). One end of the first terminal 2123-1 may be located at an upper portion. And the other end of the first terminal 2123-1 may be positioned at a lower portion. One end of the first terminal 123-1 may be curved or bent and extended in the vertical direction at the beginning of the secondary coil 2122-1. The other end of the first terminal 2123-1 may be curved or bent in the horizontal direction and then divided into first and second terminal portions 2123-1a and 2123-1b described later. According to the above description, the first terminal 2123-1 may include at least one of a bent portion and a curved portion. In this case, the bent or curved angle of the bent portion or the bent portion may be right angled.

One end of the first terminal 2123-1 may be electrically connected to the beginning of the secondary coil 2122-1. The other end of the first terminal 2123-1 can be divided into a first terminal portion 2123-1a and a second terminal portion 2123-1b. The first terminal portion 2123-1a may be electrically connected to the third case terminal 2100c by bolting. Therefore, the first terminal portion 2123-1a may be formed with a hole for bolt fastening. The second terminal portion 2123-1b may be electrically connected to the fourth case terminal 2110d by bolting. Therefore, the second terminal portion 2123-1b may be provided with a hole for bolt fastening. The third case terminal 2110c and the fourth case terminal 2100c may be electrically connected to a diode module (not shown). Therefore, the secondary coil 2122-1 can be electrically connected to the diode module through the first terminal 2123-1.

The second terminal 2124-1 may extend from the secondary coil 2122-1. The second terminal 2124-1 may be a member for electrically connecting the secondary coil 2122-1 and the inductor coil 2131-1. The second terminal 2124-1 may be a plate-shaped conductive member. The second terminal 2124-1 may extend in the top-down (vertical direction) and then in the horizontal direction. One end of the second terminal 2124-1 may be curved or bent and extended in the vertical direction at the end of the secondary coil 2122-1. The middle portion of the second terminal 2124-1 may be of a downwardly extending shape. The other end of the second terminal 2124-1 may be in the form of a plate bent in a horizontal direction or curved at an intermediate portion of the second terminal 2124-1. And the third terminal portion 2124-1a may be formed at the other end of the second terminal 2124-1. The third terminal portion 2124-1a may be electrically connected to the seventh terminal portion 2133-1a by bolting. The third terminal portion 2124-1a may be formed with a hole for bolt fastening. Thus, the second terminal 2124-1 and the fifth terminal 2133-1 can be electrically connected, and finally, the secondary coil 2122-1 and the inductor coil 2131-1 are electrically connected to each other . According to the above description, the second terminal 2124-1 may include at least one of a bent portion and a curved portion. In this case, the bent or curved angle of the bent portion or the bent portion may be right angled.

The tertiary coil 2122-2 may be disposed apart from the primary coil 2121-1. The tertiary coil 2122-2 may be positioned below the primary coil 2121-1. The tertiary coil 2122-2 can perform an electromagnetic interaction with the primary coil 2121-1. In the tertiary coil 2122-2, a current is induced by the current of the primary coil 212-11 and an induced current can be generated. The induced current generated in the tertiary coil 2122-2 may be the current that flows through the primary coil 2121-1, which is a stepped-up or stepped-down current.

The tertiary coil 2122-2 may be in the form of a plate comprising an upper surface and a lower surface forming an open ring. (One end) of the tertiary coil 2122-2 may be in a form extending from the third terminal 2123-2. In addition, an end portion (the other end) of the tertiary coil 2122-2 may be connected to the fourth terminal 2124-2. That is, one end of the tertiary coil 2122-2 may be electrically connected to the fourth terminal 2123-2, and the other end of the tertiary coil 2122-2 may be electrically connected to the third terminal 2124-2 Can be connected. The tertiary coil 2122-2 and the third and fourth terminals 2123-2 and 2124-2 may be integrally formed. However, the shape of the tertiary coil 2122-2 is not limited to the ring shape described above. For example, the tertiary coil 2122-2 may be disposed in a three-dimensional spiral shape, spaced apart from the primary coil 2121-1 in a vertical or horizontal direction. Further, the tertiary coil 2122-2 may be interleaved in a three-dimensional spiral shape while being spaced apart from the primary coil 2121-1. In this case, the first and second-order coils 2121-1 and 2122-2 can form one double-stranded spiral.

The third terminal 2123-2 may be a member for electrically connecting the tertiary coil 2122-2 to the diode module. The third terminal 2123-2 may be a plate-shaped conductive member. The third terminal 2123-2 may be in the form of extending horizontally at one end (starting portion) of the tertiary coil 2122-2. The other end of the third terminal 2123-2 can be divided into fourth and fifth terminal portions 2123-2a and 2123-2b described later.

One end of the third terminal 2123-2 may be electrically connected to the beginning of the tertiary coil 2122-2. The other terminal of the third terminal 2123-2 can be divided into a fourth terminal portion 2123-2a and a fifth terminal portion 2123-2b. The fourth terminal portion 2123-2a and the fifth terminal portion 2123-2b may be electrically connected to the diode module by bolting. Accordingly, the fourth terminal portion 2123-1a and the fifth terminal portion 2123-2b may be formed with holes for bolt fastening. Accordingly, the tertiary coil 2122-2 may be electrically connected to the diode module through the third terminal 2123-2.

The fourth terminal 2124-2 may extend from the tertiary winding 2122-2. The fourth terminal 2124-2 may be a member for electrically connecting the tertiary coil 2122-2 and the inductor coil 2131-1. The fourth terminal 2124-2 may be a plate-shaped conductive member. The fourth terminal 2124-2 may be formed to extend in the horizontal direction at the other end of the tertiary coil 2122-2. One end of the fourth terminal 2124-2 may be located at the end of the tertiary coil 2122-2. And the sixth terminal portion 2124-2a may be formed at the other end of the fourth terminal 2124-2. The sixth terminal portion 2124-2a may be electrically connected to the seventh terminal portion 2133-1a by bolting. In this case, the third terminal portion 2124-1a, the sixth terminal portion 2124-2a, and the seventh terminal portion 2133-1a may be overlapped in the vertical direction. The sixth terminal portion 2124-2a may be formed with a hole for bolt fastening. Accordingly, the fourth terminal 2124-2 and the fifth terminal 2133-1 can be electrically connected, and finally, the tertiary coil 2122-2 and the inductor coil 2131-1 are electrically connected to each other .

The inductor coil 2131-1 can receive the converted current from the secondary coil 2122-1 and the tertiary coil 2122-2. The inductor coil 2131-1 can rectify the converted current. The inductor coil 2131-1 may be connected to the external terminal 2150 to supply a rectified current.

The inductor coil 2131-1 may have a shape in which a plate including an upper surface and a lower surface is formed as a three-dimensional spiral. That is, the inductor coil 2131-1 may be in the form of a three-dimensional spiral. The beginning (lower portion) of the spiral growth of the inductor coil 2131-1 may extend from the fifth terminal 2133-1. The sixth terminal 2132-1 may be connected to the spiral growth end portion (upper portion) of the inductor coil 2131-1. The bus bar 2140-1 may extend from the sixth terminal 2132-1. The inductor coil 2131-1, the fifth terminal 2133-1, the sixth terminal 2132-1, and the bus bar 2140-1 may be integrally formed.

The seventh terminal portion 2133-1a may be formed at one end of the fifth terminal 2133-1. As described above, the seventh terminal portion 2133-1a may be electrically connected to the third terminal portion 2124-1a by bolting. In addition, the seventh terminal portion 2133-1a may be electrically connected to the sixth terminal portion 2124-2a by bolting. Therefore, the inductor coil 2131-1 may be electrically connected to the secondary coil 2122-1 and the tertiary coil 2122-2. The induced current generated in the secondary coil 2122-1 and the tertiary coil 2122-2 can be rectified in the inductor coil 2131-2. The other end of the fifth terminal 2133-1 extends in the horizontal direction (direction in which the inductor coil is positioned) at one end of the fifth terminal 2133-1, and is connected to the beginning of the spiral growth of the inductor coil 2131-2 Can be connected.

One end of the sixth terminal 2132-1 may be connected to the end of the spiral growth of the inductor coil 2131-2. The other terminal of the sixth terminal 2132-1 may be connected to one end of the bus bar 2140-1. The other end of the bus bar 2140-1 may be electrically connected to the external terminal 2150. An eighth terminal portion 2140-1a may be formed at the other end of the bus bar 2140-1 to electrically connect to the external terminal 2150. [ The eighth terminal portion 2140-1a may be formed with a bolt fastening hole for fixing and electrical connection. The inductor coil 2131-2 may be electrically connected to the external terminal 2150 through the bus bar 2140-1. As a result, the induction currents generated in the secondary coil 2122-1 and the tertiary coil 2122-2 are rectified in the inductor coil 2131-2, and then, through the bus bar 2140-1, Lt; / RTI >

≪ Third Embodiment >

Hereinafter, the DC-DC converter 3001 of the third embodiment will be described with reference to the drawings. FIG. 16 is a perspective view showing the DC-DC converter according to the third embodiment in a state in which the first cover is separated, FIG. 17 is a cutaway perspective view showing the DC-DC converter according to the third embodiment, FIG. 19 is a conceptual diagram showing a signal bridge of the DC-DC converter of the third embodiment. FIG. 19 is a schematic cross-sectional view showing a main board, an auxiliary board and a cooling plate of the exemplary DC-DC converter.

The DC-DC converter 3001 of the third embodiment may be a DC-DC converter used in a vehicle. For example, the DC-DC converter 3001 receives an electric current from an external power source device (such as a lithium ion battery), boosts or lowers the voltage, supplies the voltage to an external electronic device (such as a motor) It is possible to control the number of revolutions. 17, the DC-DC converter 3001 includes a housing 3010, a first substrate 3020, a second substrate 3030, a connecting member 3040, a coil portion 3050, and a bus bar 3060 ). DC-DC converter 3001 may be referred to as an " electronic component assembly ". In this case, auxiliary structures such as the coil portion 3050 and the bus bar 3060 may be omitted. In this case, the "electronic component assembly" of the third embodiment may have a range of scope for various electronic component assemblies as well as the DC-DC converter 3001. [ Further, the first substrate 3020 can be referred to as an "auxiliary substrate" as a substrate provided for cooling a device having a high heating value. Since the first substrate 3020 has a configuration completely different from that of a general substrate (the cooling plate plays a role of a base of a general substrate), the name of the substrate may be omitted. The second substrate 3030 may be referred to as a "main substrate" as a substrate provided to cool a device having a low calorific value. When the designation of the first substrate 3020 is omitted, the second substrate 3030 may be referred to as a "substrate ".

Hereinafter, the housing 3010 will be described with reference to FIGS. Housing 3010 may be in the form of a hollow block with an exterior member of DC-DC converter 3001. The housing 3010 includes a main body 3011, a cooling plate 3012, a first cover 3013, a second cover 3014, an inlet 3015, an outlet 3016, a cooling flow guide 3017, 3018, and a radiating fin 3019. [ The inside of the housing 3010 can be divided into a first area 3002 located at the bottom by the cooling plate 3012 and a second area 3003 located at the top. The first area 3002 may be a cooling part through which a cooling fluid flows, and the second area 3003 may be an electronic part where electronic parts are disposed. The cooling plate 3012, the first cover 3013, the second cover 3014, the inlet 3015 and the outlet 3016 of the housing 3010, the cooling channel guide 3017, the cooling channel 3018, 3019 may be integrally formed. The material of the housing 3010 may be a metal (for example, aluminum).

The main body 3011 may be formed by a side surface, and may have a hollow shape with a lower end and an upper end opened. The first cover 3013 may be disposed at the lower end of the main body 3011. [ In this case, the first cover 3013 can cover and close the opening of the lower end of the main body 3011. A second cover 3014 may be disposed on the upper end of the main body 3011. [ In this case, the second cover 3013 can cover and close the opening of the upper end of the main body 3011. [ As a result, the inner space of the housing 3010 can be formed by the main body 3011 and the first and second covers 3012 and 3013. Furthermore, the cooling plate 3012 may be disposed in the interior of the main body 3011 in the form of a horizontal partition. That is, the cooling plate 3012 may be formed over the entire surface of the horizontal section inside the main body 3011. The cooling plate 3012 can divide or separate the inside of the main body 3011 into the first area 3002 and the second area 3003. In this case, the first region 3002 and the second region 3003 may be separated from each other. A first region 3002 may be disposed under the cooling plate 3012 and a second region 3003 may be disposed over the cooling plate 3012. [

An inlet 3015 for introducing the cooling fluid and an outlet 3016 for discharging the cooling fluid flowing along the first region 3002 are formed in a portion corresponding to the first region 3002 on the side surface of the main body 3011 .

The first region 3002 can perform a cooling function to a region where the cooling fluid flows. A cooling channel guide 3017 can be disposed on the lower side of the cooling plate 3012. In this case, the cooling passage guide 3017 can have various shapes, and the cooling passage 3018 can be formed by the cooling passage guide 3017. A plurality of radiating fins 3019 may be formed in the cooling passage 3018 to increase the cooling efficiency. In this case, the plurality of radiating fins 3019 may be in the form of protrusions extending downward from the lower surface of the cooling plate 3012.

The second area 3003 can perform an electronic control function where the electronic components are disposed. For this, a first substrate 3020, a second substrate 3030, a connecting member 3040, a coil portion 3050, and a bus bar 3060 may be disposed in the second region 3003.

Hereinafter, the first substrate 3020 will be described with reference to FIG. The first substrate 3020 may be a metal printed circuit board (MPCB) having a high thermal conductivity. The first substrate 3020 can be referred to as an "auxiliary substrate" as a substrate for mounting a device having a high heating value. That is, the device mounted on the first substrate 3020 has a higher calorific value than the device mounted on the second substrate 3030, which will be described later. An element mounted on the first substrate 3020 may also be referred to as an "active element ". Here, "active element" may be an element capable of generating electric energy. For example, a transistor and an IC controller may correspond to this.

The first substrate 3020 may be disposed on the upper surface of the cooling plate 3012. In this case, the lower surface of the first substrate 3020 can contact the upper surface of the cooling plate 3012. As a result, the cooling efficiency of the first substrate 3020 may be higher than that of the second substrate 3030, which will be described later. Since the lower surface of the first substrate 3020 is in direct contact with the cooling plate 3012, the element can be mounted only on the upper surface of the first substrate 3020. The first substrate 3020 may be spaced downwardly from the second substrate 3030. That is, the first substrate 3020 may be stacked with the second substrate 3030 apart from each other. As a result, in the third embodiment, the device mounting rate can be increased in the same space. The area of the first substrate 3020 may be smaller than the area of the second substrate 3030. The first substrate 3020 may be electrically connected to the second substrate 3030. The first substrate 3020 may be electrically connected to the second substrate 3030 by a connecting member 3040.

The first substrate 3020 may include an adhesive layer 3021, a metal layer 3022, an insulating layer 3023, and a pattern layer 3024. The first substrate 3020 may be in the form of an adhesive layer 3021, a metal layer 3022, an insulating layer 3023, and a pattern layer 3024 stacked in this order. The first substrate 3020 may be composed of only the adhesive layer 3021, the metal layer 3022, the insulating layer 3023, and the pattern layer 3024.

The adhesive layer 3021 may be disposed on the cooling plate 3012 with a thermally conductive adhesive. In this case, the adhesive layer 3021 can be directly coated on the upper surface of the cooling plate 3012. [ That is, the adhesive layer 3021 can adhere to the upper surface of the cooling plate 3012. For example, the adhesive layer 3021 may be a thermel grease having a high thermal conductivity. As a result, it is possible to efficiently cool the heat generated in the element having a high calorific value to be mounted on the first substrate 3020. Further, the adhesive layer 3021 can perform the function of coupling the metal layer 3022 and the cooling plate 3012.

The metal layer 3022 may be disposed on the adhesive layer 3021. That is, the metal layer 3022 may be disposed on the adhesive layer 3021. The metal layer 3022 may be in the form of a metal plate. The lower surface of the metal layer 3022 can engage with the upper surface of the adhesive layer 3021. The material of the metal layer 3022 may include copper or aluminum having a high thermal conductivity. The first substrate 3020 by the metal layer 3022 may be referred to as a "metal printed circuit board ". The cooling efficiency of the first substrate 3020 can be increased by the metal layer 3022. [ In addition, the metal layer 3022 may serve as a supporting portion in the first substrate 3020. [ The insulating layer 3023 and the pattern layer 3024 can be supported by the metal layer 3022. [

An insulating layer 3023 may be disposed over the metal layer 3022. [ That is, the insulating layer 3023 may be disposed on the metal layer 3022. The insulating layer 3023 may be in the form of a plate made of an insulating material. The insulating layer 3023 may be a layer for forming the pattern layer 3024. [

The pattern layer 3024 may be disposed on the insulating layer 3023. The pattern layer 3024 may be coated on the insulating layer 3023. [ The pattern layer 3024 may be a layer forming a circuit of the first substrate 3020. [ Thus, the pattern layer 3024 can be various circuit patterns that are electrically conductive materials. An "active element" may be disposed in the pattern layer 3024. In this case, the "active element" may include an upper surface and a lower surface. The lower surface of the "active element" can be soldered to the pattern layer 3024. [ Therefore, the lower surface of the "active element" can face the cooling plate 3012. The "active element" may be electrically connected to the pattern layer 3024 by SMT (Surface Mount Technology). For example, the "active element" may be electrically connected to the pattern layer 3024 by a plurality of wires.

As described above, the first substrate 3020 is completely different from a general substrate in that the first substrate 3020 is composed of materials coated directly on the cooling plate 3012 with the cooling plate 3012 as a base. Thus, the first substrate 3020 may be omitted in the designation. In this case, the first substrate 3020 may be referred to as an "adhesive layer 3021, metal layer 3022, insulating layer 3023, and pattern layer 3024 ".

Hereinafter, the second substrate 3030 will be described with reference to FIG. The second substrate 3030 may be a printed circuit board (PCB). The second substrate 3030 may be referred to as a "main substrate" as a substrate for mounting a device having a low calorific value. That is, the device mounted on the second substrate 3030 has a lower calorific value than the device mounted on the first substrate 3020. The element mounted on the second substrate 3030 may also be referred to as a "passive element ". Here, the "passive device" may be an element that transmits or absorbs electrical energy but does not have an active function, such as conversion of electrical energy.

The second substrate 3030 may be spaced upward from the cooling plate 3012. To this end, a member (not shown) for supporting the second substrate 3030 may be disposed on the inner surface of the second area 3003 of the main body 3011. The first substrate 3020 may be disposed between the second substrate 3030 and the cooling plate 3012. That is, the second substrate 3030 and the first substrate 3020 may be spaced apart from each other. As a result, the cooling efficiency of the second substrate 3030 may be lower than that of the first substrate 3020. That is, the second substrate 3030 may be separated from the first substrate 3020 and stacked. In this case, the area of the second substrate 3030 may be larger than the area of the first substrate 3020. The second substrate 3030 may be electrically connected to the first substrate 3020. The second substrate 3030 may be electrically connected to the first substrate 3020 by a connecting member 3040. The second substrate 3030 may be disposed apart from the coil portion 3050 described later. In this case, the coil portion 3050 can penetrate the first substrate 3020. The first substrate 3020 and the coil part 3050 are overlapped with each other because the coil part 3050 is supported on the cooling plate 3012 and the first substrate 3020 is disposed above the cooling plate 3012. Therefore, Holes may be formed in the first substrate 3020 so that the coil portion 3050 can pass through the first substrate 3020. Referring to Figure 16, a "passive element" can be mounted on both the top and bottom surfaces of the first substrate 3020 have. As a result, in the third embodiment, the device mounting rate can be increased in the same space.

The connection member 3040 can electrically connect the first substrate 3020 and the second substrate 3030. The connecting member 3040 may be a fastening member by a press-fit method. Also, the connecting member 3040 may be a signal bridge. The connecting member 3040 may be a flexible printed circuit board (FPCB). That is, the connecting member 3040 can be in various forms. Hereinafter, the case where the connecting member 3040 is a signal bridge will be described with reference to Fig.

19A, the connecting member 3040 is curved or bent at the first conductive member 3041 forming the part of the pattern layer 3024 and the first conductive member 3041, And a second conductive member 3042 electrically connected to the second conductive member 3030. In this case, the first conductive member 3041 may be a pattern of the pattern layer 3024. The second conductive member 3042 may extend upward from the first conductive member 3041 to be electrically connected to the second substrate 3030. In this case, the upper end of the second conductive member 3042 can be coupled to the second substrate 3030 by soldering, pin bonding or the like.

19B, the connecting member 3040 is curved or bent at the first conductive member 3041 and the first conductive member 3041, which are electrically connected to the pattern layer 3024, And a second conductive member 3042 electrically connected to the second conductive member 3030. In this case, the lower surface of the first conductive member 3041 may be electrically connected to the pattern layer 3024. The lower surface of the first conductive member 3041 can be soldered to the pattern layer 3024 or bonded thereto by pin bonding or the like. The second conductive member 3042 may extend upward from the first conductive member 3041 to be electrically connected to the second substrate 3030. The upper end of the second conductive member 3042 can be coupled to the second substrate 3030 by soldering or pin joining or the like.

19 (c), the connecting member 3040 is electrically connected to the pattern layer 3024, and the first conductive member 3041 and the first conductive member 3041 in the form of a plate are electrically connected to each other, And a second conductive member 3042 extending to the second substrate 3030 side and electrically connected to the second substrate 3030. In this case, the lower surface of the first conductive member 3041 may be electrically connected to the pattern layer 3024. The lower surface of the first conductive member 3041 can be soldered to the pattern layer 3024 or bonded thereto by pin bonding or the like. The second conductive member 3042 may extend upward from the first conductive member 3041 to be electrically connected to the second substrate 3030. The upper end of the second conductive member 3042 can be coupled to the second substrate 3030 by soldering or pin joining or the like.

19D, the connecting member 3040 forms a part of the pattern layer 3024, and includes a first conductive member 3041 having a central groove formed in the form of a plate, And a second conductive member 3042 extending from the protruding portion toward the second substrate 3030 and electrically connected to the second substrate 3030. The second conductive member 3042 may be formed of a conductive material. In this case, the first conductive member 3041 may be a pattern of the pattern layer 3024. A protrusion corresponding to the groove of the first conductive member 3041 may be formed on the lower end of the second conductive member 3042 and may be soldered. As a result, the second conductive member 3042 can be electrically connected to the first conductive member 3041 and can be supported by the first conductive member 3041. The second conductive member 3042 may extend upward from the first conductive member 3041 to be electrically connected to the second substrate 3030. The upper end of the second conductive member 3042 can be coupled to the second substrate 3030 by soldering or pin joining or the like.

As described above, the "active element" is disposed on the first substrate 3020 and the "passive element" is disposed on the second substrate 3030. However, the third embodiment is not limited to this. The first substrate 3020 and the second substrate 3030 can be referred to as an " electronic device ", and the "electronic device" As shown in FIG.

Hereinafter, the coil portion 3050 and the bus bar 3060 will be described with reference to FIG. The coil portion 3050 can be supported on the cooling plate 3012. [ In this case, the lower portion of the coil portion 3050 can engage with the upper surface of the cooling plate 3012. In addition, the coil portion 3050 can be disposed apart from the second substrate 3030. In addition, the coil portion 3050 can be disposed overlapping with the second substrate 3030. In this case, the coil portion 3050 can penetrate the second substrate 3030. The coil portion 3050 may be plural. The coil portion 3050 may be a trans coil portion or an inductor coil portion. When the coil portion 3050 is the transformer coil portion, the coil portion 3050 can convert the voltage of the power source supplied from the outside. When the coil portion 3050 is the inductor coil portion, the coil portion 3050 can rectify the converted power. The bus bar 3050 can be electrically connected to the coil portion 3050 to output the converted and / or rectified power to the outside.

Hereinafter, a DC-DC converter 1 according to a modification of the third embodiment will be described with reference to the drawings. 20 is a schematic cross-sectional view showing a main board, an auxiliary board and a cooling plate of a DC-DC converter according to a modification of the third embodiment. The modification of the third embodiment has the same technical idea as that of the third embodiment except for the first substrate 3020. [ Hereinafter, description of technical ideas substantially the same as those of the third embodiment will be omitted.

The first substrate of the modification of the third embodiment may include an insulating layer 3023 and a pattern layer 3024. [ The first substrate may be in the form of an insulating layer 3023 and a pattern layer 3024 stacked in order. The first substrate may be composed of only the insulating layer 3023 and the pattern layer 3024. [

That is, in the modification of the third embodiment, the adhesive layer 3021 and the metal layer 3022 may be omitted. Instead, the cooling plate 3012 can perform the function of the metal layer 3022. Therefore, the adhesive layer 3021 for bonding the metal layer 3022 and the cooling plate 3012 may be omitted.

More specifically, the insulating layer 3023 of the first substrate may be directly coated on the top surface of the cooling plate 3012. [ That is, the insulating layer 3023 and the upper surface of the cooling plate 3012 can contact each other. In this case, the cooling plate 3012 can perform the function of supporting the metal layer 3022 of the third embodiment using a metal material. That is, the first substrate of the modification of the third embodiment can achieve the same effect as the first substrate 3020 of the third embodiment. At the same time, since the adhesive layer 3021 and the metal layer 3022 are removed, the cooling efficiency can be increased, and the size of the second substrate 3030 can be reduced in the vertical direction, And it is advantageous in terms of manufacturing process and cost due to simplification of members.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (10)

Primary coil;
A secondary coil generating an induced current by the primary coil;
A first terminal and a second terminal extending from the secondary coil;
An inductor coil connected to the second terminal to rectify a current; And
And a third terminal extending from the inductor coil,
The DC-DC converter according to claim 1, wherein the first terminal, the primary coil, the second terminal, the inductor coil, and the third terminal are integrally formed.
The method according to claim 1,
The secondary coil may include:
The DC-DC converter according to claim 1, wherein the first terminal is connected to the first terminal and the second terminal is connected to the second terminal.
The method according to claim 1,
Wherein the inductor coil includes a plate including an upper surface and a lower surface, the plate being formed as a three-dimensional spiral.
The method of claim 3,
Wherein the inductor coil is an angular spiral shape including a plurality of corner portions.
The method according to claim 1,
Wherein at least one of the first terminal, the second terminal, and the third terminal includes at least one of a bent portion or a curved portion.
The method according to claim 1,
And a current flows in both directions in the first terminal, the secondary coil, the second terminal, the inductor coil, and the third terminal.
The method according to claim 1,
A first magnetic core in which the secondary coil is disposed, and a second magnetic core in which the inductor coil is disposed.
The method according to claim 1,
Further comprising a bus bar extending from the third terminal,
The DC-DC converter according to claim 1, wherein the first terminal, the secondary coil, the second terminal, the inductor coil, the third terminal, and the bus bar are integrally formed.
Primary coil;
A secondary coil and a tertiary coil generating an induction current by the primary coil;
A first terminal and a second terminal extending from the secondary coil;
A third terminal and a fourth terminal extending from the tertiary coil;
A fifth terminal connected to the second terminal and the fourth terminal;
An inductor coil extending from the fifth terminal to rectify a current;
A sixth terminal extending from the inductor coil; And
And a bus bar extending from the sixth terminal,
Wherein the secondary coil, the first terminal, and the second terminal are integrally formed, the tertiary coil, the third terminal, and the fourth terminal are integrally formed, and the fifth terminal, the inductor coil, And the sixth terminal and the bus bar are integrally formed.
10. The method of claim 9,
Wherein the secondary coil is disposed on the primary coil, the tertiary coil is disposed below the primary coil, the secondary coil is electrically connected to the diode module by the first terminal, And the third coil is electrically connected to the diode module by the third terminal.

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