JP2019187145A5 - - Google Patents

Description

Charging device

The present invention relates to a charging device for charging a capacitor or the like mounted on a plug-in type vehicle.

Japanese Patent Application Laid-Open No. 2016-47007 (Patent Document 1) describes a DC power supply unit including a power receiving unit including a transformer and a power supply unit including a converter, and a power supply control unit that controls the DC power supply unit based on a control command. , A power supply control unit that outputs control commands and a DC power output from the DC power supply unit that is connected to the plug-in connector of the plug-in type vehicle and controlled by the power supply control unit are supplied to the power storage unit of the plug-in type vehicle. A conventional example of a charging device including a power plug and at least a housing in which a DC power supply unit, a power supply control unit, and a power supply control unit are housed is disclosed. In this conventional charging device, the housing includes at least a power storage chamber in which the power receiving unit and the power supply unit are housed, and an inspection door provided for the power storage room. The structure of the power supply storage chamber is configured so that at least the power supply unit can be pulled out to the outside of the housing via the slide mechanism when the power supply unit is arranged and the inspection door is opened.

Further, Japanese Patent Application Laid-Open No. 2013-83567 (Patent Document 2) discloses a cooling structure in which a fan is provided at the upper part of the housing by pushing outside air into the inside of the housing to cool the internal equipment of the housing.

Japanese Unexamined Patent Publication No. 2016-47007 Japanese Unexamined Patent Publication No. 2013-83567

However, Japanese Patent Application Laid-Open No. 2016-47007 (Patent Document 1) does not particularly disclose the heat dissipation structure of the power supply unit. What can be adopted as a simple cooling structure in the structure of Patent Document 1 is to attach a fan for introducing outside air from the outside to the inside of the housing to the housing as in the cooling structure shown in Patent Document 2. However, when such a structure is adopted, when the outside air temperature becomes high, the converter that generates the largest amount of heat is not sufficiently cooled, and there is a possibility that sufficient charging performance cannot be exhibited. In addition, the heat radiated from the converter may affect other equipment.

An object of the present invention is to provide a charging device capable of improving heat dissipation of a converter as compared with the conventional case and further reducing the influence of heat dissipation on other devices.

The charging device of the present invention includes a DC power supply unit including a power receiving unit including a transformer and a power supply unit including a converter circuit, a power supply control unit that controls the DC power supply unit based on a control command, and a power supply that outputs a control command. It includes a control unit and a housing in which at least a DC power supply unit, a power supply control unit, and a power supply control unit are housed. Further, in the charging device of the present invention, the housing includes at least a power storage chamber in which the power receiving unit and the power supply unit are housed, and an inspection door provided for the power storage room. The power supply unit is located in. Further, in the charging device of the present invention, a plurality of power supply units are provided inside a duct having a first intake port and a second intake port opened on the power receiving unit side, and a first exhaust port and a second exhaust port. It is equipped with a converter circuit including the semiconductor switching element of the above and a heat sink in which a plurality of semiconductor switching elements are mounted so as to be heat transferable. On top of that, inside the duct, a first passage for accommodating the heat sink and discharging the air taken in from the first intake port from the first exhaust port, and a converter circuit for accommodating and the second intake port The second passages for discharging the air taken in from the second exhaust port from the second exhaust port are independently configured.

According to the present invention, the heat radiation from the heat sink and the heat radiation from the semiconductor switching element of the converter circuit are discharged to the outside of the housing through the independent first passage and the second passage, respectively, so that the heat radiation leaks into the housing. It is possible to provide a charging device having higher heat dissipation performance than the conventional one by preventing it as much as possible.

Further, it is preferable that the structure of the power supply storage chamber is configured so that at least the power supply unit can be pulled out to the outside of the housing via the slide mechanism when the inspection door is opened. This facilitates assembly and maintenance.

In the lower region of the housing, a vent for introducing air outside the housing is formed in a portion of the power storage chamber where the power receiving portion is housed, and the first intake port is provided with air in the first passage. It is preferable that a push-in blower for pushing is arranged, and an attractive blower for drawing air from the second intake port through the internal passage of the heat sink is arranged in the second passage.

When such a configuration is adopted, heat radiation from the power receiving unit located below the power supply unit can be dispersed, absorbed and dissipated through the first passage and the second passage . In particular, if an attractive blower is arranged in the second passage, heat can be reliably dissipated from the converter circuit having a large air resistance. Further, if a push blower is used for the first passage in which the heat sink having a small air resistance is housed in order to improve the heat dissipation performance, the cooling performance can be sufficiently exhibited.

It is preferable that the housing is equipped with an exhaust duct that airtightly communicates with the first exhaust port and the second exhaust port with the duct arranged in a fixed position. With such an exhaust hole, heat from the duct does not leak into the housing, and the duct can be easily installed and pulled out into the housing.

In addition, a control unit storage room in which the power supply control unit and the power supply control unit are stored is formed above the power supply unit in a state of being communicated with the power supply storage room. It is preferable that a blower for introducing air into the storage chamber of the control unit and discharging the air to the outside of the housing is housed. If such a blower is provided, it is possible to suppress an increase in the temperature of the space inside the housing located outside the duct.

Further, it is preferable that the vent of the housing is equipped with a filter for removing dust containing salt or volcanic ash. By using such a filter, it is possible to prevent the occurrence of an internal short circuit due to the accumulation of dust.

Further, the vent of the housing may be connected to the outlet of a filter device that removes dust containing salt or volcanic ash. If the filter device is arranged outside the housing, the filtering process can be performed for a long period of time, so that the number of maintenances can be reduced.

(A) is a front view showing one embodiment of the charging device according to the present invention, and (B) is a right side view of the same charging device. It is a right-side view which shows the state of pulling out the DC power-source part in the charging device of FIG. It is a right side view which shows schematic the air passage of the power-source part in the charging device of FIG. (A) to (C) are diagrams showing the structure of a heat sink. It is a perspective view which shows the charging device of FIG. 1 which attached the filter to the vent of the housing. It is a perspective view which shows the charging device of FIG. 1 which attached the discharge port of the filter device to the ventilation port of a housing.

Hereinafter, the charging device of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1A is a front view of the charging device 1 according to the embodiment of the present invention, FIG. 1B is a right side view, and FIG. 2 shows a state in which the DC power supply unit 3 is pulled out to the outside of the housing 11. It is a right side view. Each member housed in the housing 11 cannot normally be seen from the outside, but in FIGS. 1A and 1B, the members housed in the housing 11 are conceptually shown by broken lines for convenience. There is. Further, in FIG. 2, in order to explain the outline of the first embodiment, members unnecessary for explanation are omitted for simplification.

The charging device 1 is mainly composed of a DC power supply unit 3, a power supply control unit 5, a power supply control unit 7, a power supply plug 9, and a housing 11. The DC power supply unit 3 includes a power receiving unit 13 including a transformer (not shown) and a power supply unit 15 including a converter (shown in FIG. 3). The power receiving unit 13 receives AC power from a commercial power source, transforms it, and sends it to the power source unit 15, and the power supply unit 15 converts the AC power sent from the power receiving unit 13 into DC power. The power supply control unit 5 controls the DC power supply unit 3 based on a control command from the power supply control unit 7, and supplies DC power to the power supply plug 9. The power supply control unit 7 transmits a control command in response to the operation of the touch panel by the user. Although the power supply control unit 5, the power receiving unit 13, and the power supply unit 15 are shown as blocks in FIG. 1, they actually have a structure in which a plurality of parts are mounted on the frame member.

The power plug 9 is connected to a plug-in connector of a plug-in type vehicle to be charged (not shown), and supplies DC power output from the DC power supply unit 3 controlled by the power supply control unit 5 to the capacitor of the plug-in type vehicle. To do. The power plug 9 is connected to the power control unit 5 by a power supply cable 17, and is held by a plug holder 19 provided on the outer wall surface on the right side of the housing 11 in a standby state when charging is not performed.

The housing 11 has a rectangular parallelepiped shape, and as shown in FIG. 2, the inside of the housing 11 is housed in the power storage chamber 23 and the control unit by a partition plate 22 horizontally bridged between the left and right inner wall surfaces of the housing 11. Air is partitioned from the chamber 25 so that air can communicate with each other, and a current control unit 5 is placed on the partition plate 22. An inspection door 27 is provided on the front portion of the housing 11. In the power storage chamber 23, the power supply unit 15 is arranged on the power receiving unit 13. The buttons indicated by reference numerals 21A and 21B in FIG. 1A are an operation start button and an operation stop button.

As shown in FIG. 2, a power supply control unit connection plug 29 for inputting / outputting electric power and control signals is provided in a region on the back surface side of the power supply unit 15. The power supply control unit connection plug 29 is inserted into the power supply control unit receptacle 31 arranged in the power supply storage chamber 23 electrically connected to the power supply control unit 5 to form a connector structure. With this connector structure, the power supply unit 15 and the power supply control unit 5, that is, the DC power supply unit 3 and the power supply control unit 5 are connected.

The lower region in the power storage chamber 23 is provided with a slide mechanism composed of a pair of guide rails 33, 33 and a pair of sliders 35, 35. The pair of guide rails 33, 33 are provided on the side surface portion of the housing 11 that sandwiches the lower region in the power storage chamber 23. The pair of sliders 35, 35 are provided on the side surface of a plate-shaped support (not shown) having casters 39, and are configured to slidably engage the pair of guide rails 33, 33. ing. A DC power supply unit 3 is mounted on the support, and the DC power supply unit 3 can be pulled out of the housing 11 via a slide mechanism. When the support 37 is pulled forward, the casters 39 support the front portion of the support 37, so that the sliders 35 and 35 smoothly slide on the guide rails 33 and 33.

FIG. 2 is a schematic right side view showing a state in which the DC power supply unit 3 is pulled out to the outside of the housing 11. When performing maintenance and inspection of the DC power supply unit 3, the DC power supply unit 3 can be accessed by opening the inspection door 27 (not shown in FIG. 2) sideways, and the housing 11 can be easily accessed by the slide mechanism. Can be pulled out. When the DC power supply unit 3 is pulled out, the power supply control unit connection plug 29 is pulled out from the power supply control unit receptacle 31 at the same time, so that the power supply unit 15 is not electrically connected.

In this way, with the inspection door 27 open , the structure inside the power supply storage chamber 23 is configured so that the DC power supply unit 3 can be pulled out to the outside of the housing 11 via the slide mechanism, so that assembly and maintenance can be performed. It's easy.

The housing 11 is erected on the ground via a base 41 that can be fixed on the ground. The base 41 has a rectangular parallelepiped shape with an open upper surface, and vents (not shown) are provided on both side surfaces and the rear surface of the base 41. The housing 11 is fixed to the base 41 on the bottom surface, and the bottom surface is provided with an opening (not shown) for allowing air to communicate with the base 41. Further, on the right side side of the power storage chamber 23 of the housing 11, two upper and lower vents 43, 43 are provided, and thereby, in the lower region of the housing 11, the power receiving portion 13 of the power storage chamber 23 is provided. A vent for introducing air from the outside of the housing 11 is formed in the portion where the housing 11 is housed.

The charging device 1 of the present embodiment includes an air-cooled cooling structure that cools each device by introducing air from the outside of the housing 11. The main air flow is as shown by each arrow in FIG. That is, the outside air intake A flowing in the direction indicated by the thin solid arrow has a bottom surface in the portion of the housing 11 where the power receiving portion 13 of the power storage chamber 23 is housed through the ventilation port of the base 41 and the ventilation port 43 of the housing 11. And taken in from the right side. The taken-in outside air intake A is exhausted to the outside of the housing 11 after cooling each device constituting the charging device 1 while traveling through the three main passages. The cooling ventilation traveling through each passage flows in the direction indicated by the double-line arrow, the first ventilation V1, the second ventilation V2 flowing in the direction indicated by the alternate long and short dash arrow, and the direction indicated by the thick solid arrow. The third ventilation V3.

FIG. 3 is a right side view schematically showing an air passage of the power supply unit 15 in the charging device 1. As shown in the figure, the power supply unit 15 is a duct having a first intake port 45 and a second intake port 47 which are opened on the power receiving unit 13 side, and a first exhaust port 49 and a second exhaust port 51. Inside the 53, a converter circuit 55 including a plurality of semiconductor switching elements (not shown) and a heat sink 57 in which a plurality of semiconductor switching elements are mounted so as to be heat transferable are provided. On top of that, inside the duct 53, a first passage 59 for accommodating the heat sink 57 and discharging the air taken in from the first intake port 45 from the first exhaust port 49 and a converter circuit 55 are accommodated. Moreover, the second passage 61 for discharging the air taken in from the second intake port 47 from the second exhaust port 51 is independently configured. 4 (A) to 4 (C) are a left side view, a front view, and a right side view showing the structure of the heat sink 57 used in the present embodiment. The heat sink 57 used in this embodiment. It is formed by extrusion molding and includes a plurality of internal passages 57A extending from one end to the other end.

A push-in blower 63 for pushing air into the first passage 59 is arranged in the first intake port 45, and from the second intake port 47 via the internal passage 57A of the heat sink 57 in the second passage 61. An induction blower 65 that draws in air is arranged. With such a configuration, heat radiation from the power receiving unit 13 located below the power supply unit 15 can be dispersed, absorbed and dissipated through the first passage 59 and the second passage 61. In particular, if the attracting blower 65 is arranged in the second passage 61, heat can be reliably dissipated from the converter circuit 55 having a large air resistance. Further, when the push blower 63 is used for the first passage 59 in which the heat sink 57 having a small air resistance is housed in order to improve the heat dissipation performance, the cooling performance can be sufficiently exhibited.

An exhaust duct 71 having an exhaust hole that airtightly communicates with the first exhaust port 49 and the second exhaust port 51 is attached to the housing 11 with the duct 53 arranged at a fixed position. The exhaust duct 71 has a structure for exhausting exhaust gas downward. With such an exhaust duct 71, heat does not leak due to the ventilation from the duct 53 entering the housing 11, and the duct 53 can be easily installed and pulled out into the housing 11. In the charging device 1 of the present embodiment, the DC power supply unit 3 is pulled out of the housing 11 as shown in FIG. 2, the inspection and the like are completed, the DC power supply unit 3 is returned to the fixed position, and the duct 53 is used. The positions and connection structures of the first exhaust port 49 and the second exhaust port 51 are designed so as to be airtightly communicated with the exhaust duct 71 only by arranging the first exhaust port 49 and the second exhaust port 51 in a fixed position.

A comparative experiment of cooling performance between a case where the push blower 63 is provided below the heat sink 57 arranged so as to extend vertically in the longitudinal direction and a case where the attraction blower is provided above the heat sink 57 as in the present embodiment. As a result, it was confirmed that the former can lower the temperature of the heat sink 57. Further, as in the present embodiment, a comparative experiment of cooling performance was performed between the case where the attracting blower 65 is arranged in the second passage 61 and the case where the pushing blower is arranged outside the second intake port 47. However, it was confirmed that the former can lower the temperature of the converter circuit 55. In the present embodiment, the arrangement position of each blower is determined based on the confirmation result. Needless to say, the type and arrangement position of the blower can be appropriately changed depending on the situation.

In the specification of the present application, "airtightness" is not a strict one that completely prevents gas leakage between the exhaust ports 49 and 51 and the exhaust holes of the exhaust duct 71, and occurs during normal operation. Regardless of the moving speed of each ventilation and the pressure difference between the inside of the duct 53 and the inside of the housing 11, the airtightness is such that the ventilation does not substantially leak between the exhaust ports 49 and 51 and the exhaust duct 71. Sufficient.

Further, the third ventilation V3 is introduced into the control unit storage chamber 25 from the ventilation port of the base 41 and the ventilation port 43 of the housing 11, and is discharged from the third exhaust port 67. That is, the control unit storage chamber 25 in which the power supply control unit 5 and the power supply control unit 7 are housed is formed on the power supply unit 15 in a state of communicating with the power supply storage room 23, and each inside the control unit storage room 25 is formed. A blower 69 that introduces air into the control unit storage chamber 25 from the vent through the periphery of the duct 53 and discharges the air to the outside of the housing 11 is housed. If such a blower 69 is provided, it is possible to suppress an increase in the temperature of the space inside the housing 11 located outside the duct 53.

Further, as shown in FIG. 5, a filter 73 for removing dust containing salt or volcanic ash may be attached to the vent 43 of the housing 11 of the charging device 1. When the charging device 1 is installed near a seaside or a volcano, such a filter 73 can be used to prevent corrosion due to sea salt particles and internal short circuit due to accumulation of dust.

Furthermore, as shown in FIG. 6, the outlet 43 of the housing 11 of the charging device 1 may be connected to the outlet of the filter device 75 that removes dust containing salt or volcanic ash. If the filter device 75 is arranged outside the housing 11, the filtering process can be performed for a long period of time, so that the number of maintenances can be reduced.

As described above, according to the charging device 1 of the present embodiment, the heat radiating from the heat sink 57 and the heat radiating from the semiconductor switching element of the converter circuit 55 are housed through independent first passages 59 and second passages 61, respectively. Since the heat is discharged to the outside of the housing 11, it is possible to prevent the leakage of heat radiation to the inside of the housing 11 as much as possible, and to provide a charging device having higher heat dissipation performance than the conventional one.

Although the embodiment of the present invention has been specifically described above, the present invention is not limited to the embodiment, and it is needless to say that the present invention can be changed within the scope of the technical idea of the present invention. ..

According to the present invention, it is possible to provide a charging device capable of improving heat dissipation of the converter as compared with the conventional case and further reducing the influence of heat dissipation on other devices.

1 Charging device 3 DC power supply unit 5 Power supply control unit 7 Power supply control unit 9 Power supply plug 11 Housing 13 Power receiving unit 15 Power supply unit 17 Power supply cable 19 Plug holder 22 Partition plate 23 Power supply storage room 25 Control unit storage room 27 Inspection door 29 Power supply control Connection plug 31 Power control receptacle 33 Guide rail 35 Slider 39 Caster 41 Base 43 Vent 45 First intake port 47 Second intake port 49 First exhaust port 51 Second exhaust port 53 Duct 55 Converter circuit 57 Heat insulation 59 1st passage 61 2nd passage 63 Push-in blower 65 Induction blower 67 3rd exhaust port 69 Blower 71 Exhaust duct 73 Filter 75 Filter device A Outside air intake V1 1st ventilation V2 2nd ventilation V3 3rd Ventilation