KR20110001013A - Power relay box - Google Patents

Abstract

PURPOSE: A power connection box is provided to prevent the malfunction of the power connection box by minimizing panel vibration to the inner component in the power connection box. CONSTITUTION: A precharge relay(40), a precharge resistor(41), a first main relay(42) and a second main relay(46) are mounted in a main body(11). A center receiving unit and a side receiving unit are formed in the main body. A penetration hole is formed on the center of the bottom of the center and side receiving units. A short inverter bus bar(20) is fixed with a bus bar fixing unit of the main body. A long inverter bus bar(25) is fixed with the bus bar guide of the main body.

Description

Power relay box

The present invention relates to a power connection box, and more particularly, to a power connection box for controlling the on or off of the power battery by supplying or cutting off power to the battery of the hybrid car.

The hybrid car is a next-generation vehicle that dramatically reduces fuel consumption and harmful gas emissions compared to conventional vehicles, such as installing an internal combustion engine and an electric engine of an electric vehicle at the same time or minimizing air resistance by dramatically reducing the weight of the vehicle body. Say.

Recently, when the commercialization of electric vehicles becomes difficult due to the limited amount of battery charge, hybrid cars are being developed in such a way that an electric engine is assisted with a gasoline engine by simultaneously mounting an existing gasoline engine and an electric engine.

The electric engine used in the hybrid car is a motor that greatly supports driving power during operation, a battery that stores electric energy, an inverter that supplies and controls the high voltage of the battery to the driving motor, a power source that connects the inverter and the battery and controls the power of the battery. It consists of a connection box.

It is an object of the present invention to provide a power connection box in which parts such as relays and busbars are compactly assembled in one box and the assembly work of these parts is facilitated.

Another object of the present invention is to provide a power connection box having a top cover and a bottom cover for a heat dissipation function.

Another object of the present invention is to provide a power connection box that minimizes the transmission of the panel vibration of the mounting space to the internal parts.

According to a feature of the present invention for achieving the object as described above, the present invention is formed on both sides of the central seating portion and the central seating portion where the plastic relay is seated, and the first and second main relays are fastened to the respective bus bars. A main body including a side seat portion in which the parts are seated in opposite directions and a resistance seat portion in which precharge resistance is seated between the both side seat portions, and one end of which is coupled to the bus bar fastening portion of the first main relay and Short inverter bus bar, the end of which protrudes to the outer surface of the main body, one end of which is coupled to the bus bar fastening portion of the second main relay and the other end of the first main relay across the upper surface of the main body Long inverter bus bar protruding alongside the short inverter bus bar, the lower cover is coupled to the lower portion of the main body, the inner cover is fastened to the upper portion of the main body It is configured to include; Openings are formed at positions corresponding to the bus bar fastening portions of the first and second main relays on both sides of the main body to allow bolting operations from the outside of the main body, and the openings are formed at edges of the lower cover. The shielding wall for shielding the protruding a predetermined height is characterized in that it is formed.

A plurality of heat dissipation holes are formed in the lower cover, and hanger hooks protruding from the inner side of the main body are hooked around the edges of the lower cover.

It is further provided with an upper cover coupled to the upper portion of the inner cover and formed with a plurality of heat dissipation portions, and a misinsertion prevention groove on both sides of the fastening hole formed at the center of the inner cover. The fastening boss is inserted into the fastening hole is formed to protrude, characterized in that the misinsertion prevention ribs corresponding to the misinsertion prevention groove is formed on both sides of the fastening boss.

In the power connection box according to the present invention, the following effects can be obtained.

According to the present invention, the bolts are made through the openings of the main body in the state in which the parts are preassembled at the predetermined position. Components such as hangers, hangers, busbar guides, and busbargo governments ensure that the parts are assembled securely. Further, when the long inverter bus bar is fitted to the bus bar guide, the long inverter bus bar may cross the upper portion of the first main relay, thereby preventing removal of the first main relay by the long inverter bus bar. As such, components such as relays and busbars are compactly assembled in one box, and each component can be assembled in the main body, thereby reducing the size of the power connection box and improving assembly workability.

In addition, according to the present invention, a circuit protection lower cover having a heat dissipation function is fastened to the main body, and a shielding wall on the lower cover shields the opening of the main body. In addition, the circuit protection upper cover for heat dissipation is coupled to the inner cover fastened to the upper part of the main body by a fastening boss, and the fastening boss and the inner cover have a misassembly preventing rib and a misassembly preventing groove for preventing misassembly of the upper cover. Is formed. Parts such as busbars are reliably covered by the upper cover and the lower cover to maintain heat dissipation performance, and above all, the assembly of the upper cover and the lower cover is easy.

In addition, according to the present invention, the dustproof boss is provided in the mounting portion of the outer surface of the main body, and since the vibration absorbing portion of the dustproof boss is in contact with the panel of the mounting space, it is minimized that the panel vibration is transmitted to the internal parts of the power connection box to connect the power It prevents malfunction of the box and reduces noise.

Hereinafter, a preferred embodiment of a power connection box according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a preferred embodiment of the power connection box according to the present invention, Figure 2 is a separate perspective view of each configuration of the power connection box of Figure 1, Figure 3 and the main body of the present invention embodiment The relay is shown in a separate perspective view, in FIG. 4 a cross sectional view taken along the line BB 'of FIG. 2, and in FIG. 5 a cross sectional view taken along the line C-C' of FIG.

1 and 2, the power connection box 10 is largely composed of the main body 11, the lower cover 60, the inner cover 70, the upper cover 80.

First, the assembling structure of the main body 11 and the components will be described.

3 to 5, the main body 11 is open in an approximately rectangular parallelepiped shape. The precharge relay 40, the precharge resistor 41, the first main relay 42, the second main relay 46, and a plurality of bus bars 20 and 25 are mounted in the main body 11. do.

As shown in FIG. 3, the main body 11 includes a central seating part 12 on which a precharge relay 40 is seated, and a first main relay 42 and a second main relay 2 on both sides of the center seating part 12. Side mounting portions 12 'on which 46 is seated are formed, respectively.

A predetermined region through hole 12 "is formed at the center of the bottom surface of the center and the side seating portions 12 and 12 '. Communicates with the heat of the component to escape. In fact, the bottom of the parts is seated in the edge portion of the through hole 12 ″ so that the parts are installed.

The central seating part 12 and the lateral seating part 12 ′ are provided with sidewalls 13 having a predetermined height for supporting the side surfaces of the components to be seated. A plurality of flow preventing ribs 13 ′ are formed on the inner surface of the side wall 13. The flow preventing rib 13 'serves to prevent the flow of the parts by supporting the outer surface of the components seated in the center and side seating portion (12, 12').

Some of the side walls 13 are hangers 14. The hanger 14 hangs on the first and second main relays 42 and 46 and the engaging protrusions 42a and 46a formed on both sides of the precharge relay 40. Both ends of the hanger 14 and the side wall 13 are separated by the slit 15, so that the tip of the hanger 14 is elastically deformed to some extent.

The resistance seating part 17 is formed between the side seating parts 12 ′ and adjacent to the center seating part 12. A pair of hook arms 18 protrude a predetermined height at the tip of the resistance seat 17. The pair of hook arms 18 are provided side by side to face each other. At the front ends of the hook arms 18 facing each other, a hook jaw 19 that is seated on the upper surface of the precharge resistor 41 is formed. The hook jaw 19 is hooked on the precharge resistor 41 so that the fixing of the precharge resistor 41 is maintained. The hook arm 18 is also elastically deformable in a direction away from each other due to the characteristics of the material and shape.

Next, the busbar fixing structure will be described. In this embodiment, the bus bar assembled to the main body 11 includes a short inverter bus bar 20 and a long inverter bus bar 25.

As shown in FIG. 4, the short inverter bus bar 20 is fixed by the bus bar fixing part 21 of the main body 11. The bus bar fixing part 21 is a portion for fixing the short inverter bus bar 20, and the short inverter bus bar 20 is inserted into and fixed to the slot 21 'of a predetermined length which is opened upward. One end of the short inverter bus bar 20 is fixed to a bus bar holder 22 formed at an upper end of one surface of the main body 11 as a part connected to an inverter (not shown). The other end of the short inverter bus bar 20 is fastened to the lower fastening portion 44 of the first main relay 42.

And, as shown in Figure 5, the long inverter bus bar 25 is fixed by the bus bar guide 26 of the main body (11). The bus bar guide 26 is provided to fix and guide the long inverter bus bar 25 to be described later, and is provided between both side seating portions 12 '. The bus bar guide 26 has one end of the long inverter bus bar 25 passing through the upper part of the first main relay 42 and the other end thereof located at the lower fastening part 48 of the second main relay 46. Guide the long inverter bus bar (25). The bus bar guide 26 has a channel 27 into which the long inverter bus bar 25 is fitted. A plurality of support ribs 27 ′ protrude from both sides of the channel 27 to prevent the long inverter bus bar 25 from flowing. One end of the long inverter bus bar 25 is seated and fixed to the bus bar holder 28 formed on one side of the main body 11 and the other end of the long inverter bus bar 25 is the second main relay. It is fastened to the lower fastening part 48 of 46.

On the other hand, the opening 29 is formed at a position corresponding to the bus bar fastening portion 42 ′ of the first main relay 42 among the side surfaces of the main body 11. The opening 29 'is also formed through a position corresponding to the bus bar fastening portion 46' of the second main relay 46 among the side surfaces of the main body 11. Bolting is possible to the bus bars 20 and 25 temporarily assembled to the main body 11 through the openings 29 and 29 '. The openings 29 and 29 'are shielded by shielding walls 65 and 65' of the lower cover 60 which will be described later.

Meanwhile, as shown in FIG. 5, the wires W connect the components seated on the main body 11 to each other, and the precharge resistor 41 and the lower fastening portion 48 of the second main relay 46 are connected to each other. Hooks 36 and wire passing holes 38 are provided to organize the wires W '. In the present embodiment, the hook 36 is protruded in a '-' shape on the outer surface of the bus bar guide 26 to hang the wire (W '). In this embodiment, the wire passing hole 38 is formed at the lower end of the lateral seating portion 12 ′.

The first main relay 42 will be described with reference to FIGS. 3 and 4. Engaging protrusions 42a are formed on both side surfaces of the first main relay 42. The locking protrusion 42a is hooked to the tip of the hanger 14 of the main body 11 to fix the first main relay 42. A pair of bus bar fastening portions 42 ′ are formed on the front of the first main relay 42. The lower fastening portion 44 is bolted to the short inverter bus bar 20. The upper fastening portion 43 is bolted to one end of the first battery bus bar 50 of FIG. 2. Referring to FIG. 2, the other end of the first battery bus bar 50 is exposed to the upper portion of the inner cover 70 and is connected to a battery (not shown) by an electric wire.

A partition wall 45 is formed between the upper fastening portion 43 and the lower fastening portion 44 on the outer surface of the first main relay 42, and the partition wall 45 is the upper fastening portion 43 and the lower portion. It serves to block the contact between the fastening portion (44). In the present embodiment, the partition wall 45 is formed in a substantially 'V' shape. In more detail, the partition wall 45 is formed to correspond to the shape of the short inverter bus bar 20 to guide the short inverter bus bar 20.

3 and 5, since the second main relay 46 is formed in the same structure as the first main relay 42, a detailed description thereof will be omitted. That is, the engaging protrusion 46a is formed on both side surfaces of the second main relay 46. In addition, the outer surface of the second main relay 46 is provided with a bus bar fastening portion 46 'including an upper fastening portion 47 and a lower fastening portion 48, and an upper fastening portion 47 and a lower fastening portion. A partition wall 49 for blocking the 48 is formed, and the partition wall 49 is formed in a shape corresponding to the shape of the long inverter bus bar 25 to guide the long inverter bus bar 25. In the present embodiment, the partition 49 of the second main relay 46 is also formed in a substantially 'V' shape.

Referring to FIG. 2, one end of the second battery bus bar 51 is bolted to the upper fastening portion 47. And the other end of the second battery bus bar 51 is fixed to the upper portion of the inner cover 70 is connected by a battery (not shown) and the wire.

Hereinafter, the vibration preventing structure of the power connection box 10 will be described. 6 is an enlarged view of a part of the embodiment of the present invention.

As shown in Figure 2 and 6, a plurality of mounting portion 53 is formed to extend on the lower outer surface of the main body (11). The flange 54 protrudes by a predetermined width around the inner circumferential surface of the mounting portion 53. The tip of the flange 54 is inserted into the fixing groove 57 of the dustproof boss 55. An inlet 54 ′ is formed at one side of the mounting portion 53 to allow the dustproof boss 55 to enter and exit.

In the present embodiment, the mounting portion 53 is formed on three surfaces of the main body 11, respectively. That is, the mounting portion 53 is formed on both sides and the front of the main body 11, respectively, based on FIG. A reinforcing piece 53a for reinforcing the strength of the mounting portion 53 positioned on the side of the main body 11 is formed to extend perpendicular to the upper surface of the mounting portion 53.

And reinforcing pieces (53b) for reinforcing the strength of the mounting portion 53 located in the front of the main body 11 is formed extending from the both sides of the mounting portion 53 toward the main body (11). A reinforcing bridge 53c is further formed between the reinforcing piece 53b and the main body 11.

The anti-vibration boss 55 includes a vibration absorbing part 56 formed in a substantially cylindrical shape and a fastening boss 58 integrally provided inside the vibration absorbing part 56. The vibration absorbing part 56 is formed of an elastic material such as rubber to absorb vibration between the mounting part 53 and the fastening boss 58. A fixing groove 57 is formed to insert the tip of the flange 54 surrounding the outer circumferential surface of the vibration absorbing portion 56. In addition, the fastening boss 58 is formed in a cylindrical shape made of steel, and is a portion through which a bolt for fixing the main body 11 to a panel (not shown) of the mounting space of the vehicle passes.

The lower end of the vibration absorbing portion 56 protrudes more than the lower end of the fastening boss 58, so that the vibration absorbing portion 56 is in contact with the panel (not shown). After the assembly of the parts and the busbar to the main body 11 is completed, the covers are coupled.

FIG. 7 is a cross-sectional view taken along line AA ′ of FIG. 1, and FIG. 8 is a perspective view of the top cover constituting the embodiment of the present invention.

Based on these drawings, the cover coupling structure of the main body 11 is demonstrated.

First, the lower cover 60 is assembled to the lower portion of the main body 11. A plurality of heat dissipation holes 62 are formed in the lower cover 60. The lower cover 60 shields the bottom surface of the main body 11 to protect internal components, and also performs a heat dissipation function through the heat dissipation hole 62.

The shielding walls 65 and 65 'are formed to protrude a predetermined height at positions corresponding to the openings 29 and 29' of the main body 11 in the lower cover 60. When the lower cover 60 is fastened to the main body 11, the shielding walls 65 and 65 ′ shield the openings 29 and 29 ′.

A hook hook 66 is formed around the edge of the lower cover 60. The hook hook 66 is formed on the corresponding inner surface of the main body 11 as shown in FIG. 7. By engaging in the lower cover 60 and the main body 11 is coupled.

The inner cover 70 is a part for shielding the upper surface of the main body (11). The inner cover 70 is coupled to the main body 11 in a state where the first and second battery bus bars 50 and 51 are seated. The inner cover 70 and the main body 11 are fastened to each other by bolts at the corners.

The first and second battery bus bars 50 and 51 are each formed in a '-' shape, and one end of the bolt protrudes from the first and second fixing parts 72 and 72 'of the inner cover 70. (73,73 ') is fixed and the other end is protruded below the inner cover 70 through the through holes (74, 74') formed in the inner cover 70, the first and second main relays (42, 46) ) Are located at the upper fastening portions 43 and 47.

For reference, the bolts 73 and 73 'are insert-molded into the inner cover 70 as a metallic material which can be electrically energized, and the ring terminals (not shown) of the counterparts are provided on the bolts 73 and 73'. The nut is tightened in the fitted state.

A fastening hole 75 is formed in the center of the inner cover 70 as shown in FIG. The fastening hole 75 is a part to which the fastening boss 83 of the upper cover 80 of the upper part is hooked. Opposite end preventing grooves 76 and 77 are formed at positions displaced from opposite ends of the fastening hole 75. This is to prevent the misassembly of the upper cover 80. In addition, the fixing channel 78 surrounding the top edge of the inner cover 70 is formed by concave. The bottom of the side wall 81 of the upper cover 80 is seated in the fixing channel 78.

The upper cover 80 is for shielding the first and second battery bus bars 50 and 51 exposed on the inner cover 70. Side walls 81 are formed surrounding the edges of the top cover 80. One side of the side wall 81 is formed with a plurality of heat dissipation 82. The heat dissipation part 82 is formed by cutting a part of the side wall 81.

In the center of the bottom surface of the upper cover 80, a fastening boss 83 engaged with the fastening hole 75 is formed to protrude a predetermined length. The fastening boss 83 is composed of a pair of opposite fastening pieces 84, the fastening piece 84 is elastically deformable in a direction close to each other. Hooks 85 are formed on outer surfaces of the fastening pieces 84 opposite to each other to be hooked to the fastening holes 75.

On the outer surfaces of the fastening piece 84 opposite to each other, the misassembly prevention ribs 87 and 88 are formed at positions displaced from each other. The misassembly preventing ribs 87 and 88 are inserted into the corresponding misassembly preventing grooves 76 and 77 to guide the insertion direction of the upper cover 80. The misassembly prevention ribs 87 and 88 also serve to reinforce the strength of the fastening piece 84.

Hereinafter, the operation of the power connection box according to a preferred embodiment of the present invention. The assembly process of the power connection box will be described with reference to the drawings.

First, the first and second main relays 42 and 46 are in the lateral seating part 12 ', the precharge relay 40 is in the center seating part 12, and the precharge resistor 41 is in the resistance seating part 17. Settles on each. At this time, the flow of the respective components is prevented by the flow preventing ribs 13 'formed on the inner surface of the side seating portion 12' and the central seating portion 12.

Next, the long inverter bus bar 25 is seated on the bus bar guide 26, and the short inverter bus bar 20 is fitted to the bus bar fixing part 21. Then, the end of the long inverter bus bar 25 is connected to the lower fastening portion 48 of the second main relay 46, and the end of the short inverter bus bar 20 is the lower fastening portion of the first main relay 42 ( 44).

In this case, the long inverter bus bar 25 may be positioned above the first main relay 42 to prevent the first main relay 42 from being removed.

Next, connect the wires between the parts. At this time, the electric wire connecting the precharge resistor 41 and the lower fastening portion 48 of the second main relay 46 is put together by the hook hole 36 and the wire passing hole 38 of the main body 11.

Next, the inner cover 70 is assembled to the main body (11). The first battery bus bar 50 and the second battery bus bar 51 are already assembled in the inner cover 70. When the inner cover 70 is coupled to the upper end of the main body 11 and the bolt B is fastened to the corners, the end of the first battery bus bar 50 is fastened to the upper part of the first main relay 42. End portions of the second battery bus bars 51 in the portion 54 are positioned at the upper fastening portions 47 of the second main relays 46, respectively. This completes the preassembly of the parts.

In this case, the long inverter bus bar 25, the second battery bus bar 51, and the short inverter bus bar 20 are formed by the partition walls 45 and 49 formed in the first and second main relays 42 and 46. And the first battery bus bar 50 is completely blocked. In addition, removal of the long inverter bus bar 25 and the short inverter bus bar 20 is prevented by the partition walls 45 and 49.

In this state, the terminal bolts B 'are assembled to the bus bar fastening portions 42' and 46 'of the first and second main relays 42 and 46 to fasten the bus bar and the relay. The bolt fastening operation is performed through the openings 29 and 29 'of the main body 11. When the bolt is tightened, the assembly of the parts is completed.

Next, the lower cover 60 is coupled to the main body (11). At this time, the shielding walls 65 and 65 'of the lower cover 60 shield the openings 29 and 29'.

Finally, the fastening boss 83 of the upper cover 80 is inserted into the fastening hole 75 of the inner cover 70 to couple the upper cover 80 to the inner cover 70. At this time, the misinsertion prevention ribs 87 and 88 of the fastening boss 83 are formed at positions shifted from each other, and the upper cover 80 is inserted into the misinsertion prevention grooves 77 and 76 of the corresponding fastening holes 75, respectively. The assembly direction of is guided.

The bus bars and the circuit are protected by the lower cover 60 and the upper cover 80. The heat generated from the relay and the bus bar is smoothly dissipated to the outside by the heat dissipation hole 62 formed in the lower cover 60 and the heat dissipation unit 82 formed in the upper cover 80.

Power connection box 10 is assembled to the upper cover 80 is fixed to a panel (not shown) provided in the mounting space of the vehicle. To this end, the dustproof boss 55 is fitted into the mounting portion 53 of the main body 11 and fixed to the panel by fastening a bolt to the fastening boss 58 of the dustproof boss 55. At this time, the vibration absorbing portion 56 of the dustproof boss 55 is in contact with the main body 11 and the panel to mitigate the vibration generated between them.

According to the present invention, components such as relays and resistors are assembled to the main body without additional bolting. And by assembling the bus bar to the main body is the structure to prevent the removal of the relay. The bulkhead structure of the relay serves to block the upper fastening part and the lower fastening part and to guide the bus bar at the same time. In addition, according to the present invention, a dustproof boss is used in the mounting portion of the main body to prevent vibration.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

The precharge relay, the first and second main relays, and the precharge resistor described in the claims are examples of components installed in the main body, and components having other functions may be mounted.

1 is a perspective view showing a preferred embodiment of the power connection box according to the present invention.

Figure 2 is an exploded perspective view showing each configuration of the power connection box of FIG.

Figure 3 is an exploded perspective view showing a main body and a relay of the embodiment of the present invention.

4 is a cross-sectional view taken along line BB ′ of FIG. 2.

5 is a cross-sectional view taken along the line CC ′ of FIG. 2.

Figure 6 is an enlarged view showing the mounting portion of the embodiment of the present invention.

7 is a cross-sectional view taken along line AA ′ of FIG. 1.

Figure 8 is a perspective view of the top cover constituting an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11: main body 12: center seat

12 ': Side seat 13: Side wall

14: hanger 17: resistance seat

20: Short Inverter Bus Bar 21: Bus Bargo Government

25: Long inverter bus bar 26: Bus bar guide

22, 28: bus bar holder 36: hanger

38: wire passing hole 40: precharge relay

41: precharge resistance 42: first main relay

46: 2nd main relay 42 ', 46': bus bar fastening

45, 49: bulkhead 50, 51: first and second battery relay

55: prevention boss 60: lower cover

65: shielding wall 66: hook hook

70: inner cover 75: fastening hole

76, 77: incorrect insertion groove 80: upper cover

83: Tightening boss 87. 88: Incorrect insertion rib

Claims (7)

Between the lateral seating portion and the lateral seating portion formed on both sides of the central seating portion in which the plastic relay is seated and the first and second main relays are seated so that the respective busbar fastening portions face in opposite directions. A main body including a resistance seating portion on which precharge resistance is seated; A short inverter bus bar having one end coupled to the bus bar fastening portion of the first main relay and the other end protruding from the outer surface of the main body; A long inverter bus bar having one end coupled to the bus bar fastening portion of the second main relay and the other end protruding parallel to the short inverter bus bar on an outer surface of the main body across the upper portion of the first main relay; A lower cover coupled to the lower portion of the main body, An inner cover fastened to an upper portion of the main body; Openings are formed at the positions corresponding to the bus bar fastening portions of the first and second main relays on both sides of the main body so as to allow bolting operations from the outside of the main body. Power connection box, characterized in that formed on the edge of the lower cover protruding a shielding wall for shielding the opening. The method of claim 1, wherein the lower cover is formed with a plurality of heat dissipation holes, Power hooking box, characterized in that the hook hook is formed around the edge of the lower cover protruding the engaging projection protruding inside the main body. According to claim 1 or 2, It is further provided with an upper cover coupled to the upper portion of the inner cover is formed a plurality of heat dissipation, Is formed in the position where the misinsertion prevention grooves are shifted on both sides of the fastening hole formed in the center of the inner cover, The upper cover is a power supply box, characterized in that the fastening boss is inserted into the fastening hole is formed to protrude, the misinsertion prevention rib corresponding to the misinsertion prevention groove is formed on both sides of the fastening boss. 4. The power connection box according to claim 3, wherein a fixing channel is formed on the upper surface of the inner cover to seat the lower sidewall of the upper cover. According to claim 4, Between the both side mounting portion is provided with a bus bar guide for fixing and guiding the long inverter bus bar, The bus bar guide is formed with a channel into which the long inverter bus bar is fitted. Power connection box, characterized in that formed on the both sides of the channel protruding a plurality of support ribs for preventing the flow of the long inverter bus bar. According to claim 5, The main body is provided with a bus bar fixing part for fixing the short inverter bus bar, The bus bar fixing part is provided with a slot having a predetermined length opening to the top, the power inverter box, characterized in that the short inverter bus bar is fitted into the slot is fixed. The battery assembly of claim 6, further comprising: a first battery bus bar having one end fastened to a part fastening part of the first main relay and the other end penetrating through the inner cover to be fixed to an upper surface of the inner cover; And a second battery bus bar, one end of which is fastened to the component fastening part of the second main relay and the other end of which penetrates the inner cover and is fixed to an upper surface of the inner cover.

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