JP4163097B2 - VEHICLE POWER STORAGE DEVICE AND HIGH-PIEZOELECTRIC COOLING DEVICE FOR VEHICLE MOTOR - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of parts and man-hours and to make height of the whole base plate uniform, in a capacitor for vehicle traveling only by a motor or for a vehicle traveling by an engine and a motor, and a cooling device for high voltage electric equipment for a vehicle motor for cooling a high voltage electric instrument such as a capacitor and an inverter. <P>SOLUTION: A recessed part 91 is provided on a side surface 20A at a battery 10 side of a base plate 20 bonded to a side surface of the battery 10. A main switch 121 and a main fuse 122 are stored/arranged in the recessed part 91. On the other hand, a battery current sensor and a conductor are arranged on a base surface not opposed to the recessed part 121 of a side surface at the opposite side to the battery 10 of the base plate 20. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power storage device for a vehicle that travels only by a motor or a vehicle that travels by an engine and a motor, and a cooling device for a high voltage electrical equipment for a vehicle motor that cools the high power equipment such as the power storage device and an inverter. It is.

In this type of vehicle, in addition to a low voltage battery as a power source for auxiliary equipment, a high voltage battery as a power source for a traveling motor is mounted. The output of the high-voltage battery is relayed through a contactor and a fuse, and is further connected to a traveling motor via a power drive unit (PDU). Here, if parts having a high voltage battery protection function such as a contactor and a fuse are distributed and arranged in various parts of the vehicle, the maintainability is deteriorated.
Therefore, in Patent Document 1 below, a base plate is attached to the side surface of the high voltage battery, and a circuit including battery protection functional parts such as a main switch, a contactor, and a fuse is formed thereon.
JP 2001-23700 A

However, in the technique disclosed in Patent Document 1, since all battery protection functional parts such as a main switch, a contactor, and a fuse are mounted on one side of the base plate, the neutral point circuit is insulated from the main circuit. There is a need to reduce the number of parts and man-hours.
In addition, since there are variations in the height dimension between the battery protection functional components on the base plate, there is also a demand to make the height of the entire base plate uniform.

  The present invention has been made in view of the above circumstances, and an object thereof is to reduce the number of parts and man-hours and to make the height of the entire base plate uniform.

In order to solve the above-mentioned problems, the invention of claim 1 is directed to a storage battery (for example, a power supply for supplying power to a traveling motor (for example, a motor 2 in a later-described embodiment) via an inverter (for example, PDU3 in a later-described embodiment)). A module group 14 in an embodiment described later) and a surface (for example, a plate portion in the embodiment described later) that supports the capacitor and supports terminals (for example, terminal portions T1 to T4 in the embodiment described later). 97) including a support frame (for example, a side surface portion 12b in an embodiment described later) and a base plate (for example, a base plate 20 in an embodiment described later) coupled to the support frame so as to face the surface of the support frame. And a main switch (for example, a main switch 121 in an embodiment described later) provided on the base plate. , A fuse (for example, a main fuse 122 in an embodiment described later), an overcurrent detection sensor means (for example, a battery current sensor 124 in an embodiment described later), and an output circuit of the battery when an overcurrent is detected by the sensor means A battery protection function section (for example, a battery protection function section 9 in the embodiment described later) comprising contactor means (for example, a contactor 123 in the embodiment described later), and the terminal extends on the base plate. In the vehicle power storage device connected to the battery protection function unit (for example, the battery 10 in the embodiment described later),
A recess (for example, a recess 91 in a later-described embodiment) is provided on a side surface (for example, a side surface 20A in the later-described embodiment) of the base plate, and the main switch and the fuse are accommodated in the recess, The sensor means and the contactor means are arranged in a region (for example, a base surface 100 in an embodiment described later) that does not face the concave portion on a side surface (for example, a side surface 20C in the embodiment described later) of the base plate opposite to the capacitor. It is characterized by that.
According to such a configuration, among the battery protection function units mounted on the base plate, the height variation between the relatively large component and the smaller component is made uniform. .

According to a second aspect of the present invention, in the vehicle power storage device according to the first aspect, the fuse is disposed on the inner side and the main switch is disposed on the outer side.
According to such a configuration, during maintenance or the like, the operation from the outside of the main switch is facilitated, and contact with the fuse is effectively avoided.

According to a third aspect of the present invention, in the vehicle power storage device according to the first aspect, a positive electrode (for example, a neutral point terminal portion T3 in a later-described embodiment) and a negative electrode (for example, a later-described embodiment) at the neutral point of the capacitor. A plate-like conductive member (for example, bus plates C, D, and E in the embodiments described later) that connects the neutral point terminal portion T2) to the main switch is formed on the side surface of the base plate on the capacitor side. It is characterized by being disposed in a concave groove (for example, concave grooves 93a and 93b and a concave portion 91 in the embodiments described later).
According to such a configuration, since the neutral point circuit is configured on the side surface of the base plate on the capacitor side, the neutral point circuit is insulated from the main circuit configured on the side surface opposite to the capacitor side of the base plate. No need for a cover.

The invention of claim 4 includes an inverter (e.g., PDU3 in an example described later) that controls a traveling motor (e.g., motor 2 in an example described later), and a capacitor (e.g., power supplied to the motor via the inverter). , A module group 14 in an embodiment described later), a step-down device (for example, a DC / DC converter 4 in an embodiment described later) for reducing the power supply voltage of the battery, and a fan for guiding cooling air to the battery and the inverter ( For example, a high voltage for a vehicle motor including a fan 6) in an embodiment to be described later, and the capacitor, the inverter, the step-down device, and the fan are concentratedly arranged under a seat (for example, a rear seat 7 in an embodiment to be described later). An electrical equipment cooling device (for example, a high-voltage electrical equipment cooling device 1 in an embodiment described later),
A support frame (for example, a later-described embodiment) including a surface (for example, a plate portion 97 in a later-described embodiment) that supports the capacitor and supports terminals (for example, terminal portions T1 to T4 in a later-described embodiment) of the capacitor. A side plate 12b), a base plate (for example, a base plate 20 in an embodiment to be described later) coupled to the support frame so as to face the surface of the support frame, and a main switch (for example, Main switch 121 in an embodiment described later), fuse (for example, main fuse 122 in an embodiment described later), sensor means for detecting overcurrent (for example, battery current sensor 124 in an embodiment described later), and the sensor means Contact that shuts off the battery output circuit when an overcurrent is detected Means (e.g., a contactor 123 in the embodiment described later); and a battery protection unit made of (for example, a battery protecting function unit 9 in the embodiment described later),
The terminal extends on the base plate to connect to the battery protection function unit, and the concave portion (for example, to be described later) provided on the side surface of the base plate on the battery side (for example, the side surface 20A in the later-described embodiment). The main switch and the fuse are accommodated and disposed in the recess 91 in the example, and the side surface (for example, the side surface 20C in the embodiment described later) of the base plate opposite to the recess (for example, in the embodiment described later) The sensor means and the contactor means are arranged on the base surface 100).
According to such a configuration, cooling of the high voltage electrical equipment for the vehicle motor that can avoid a decrease in utility and the like by centrally packaging the high voltage equipment such as a high voltage power supply and an inverter including the fan under the seat. Also in the apparatus, the variation in height between a part having a relatively large height dimension and a part having a smaller height dimension among the battery protection function parts mounted on the base plate is made uniform.

According to the present invention, among the battery protection function parts mounted on the base plate, the height variation between the parts having a relatively large height dimension and the parts having a smaller height dimension is made uniform. The handling ability is improved and the space can be effectively used.
In maintenance or the like, the operation from the outside of the main switch is facilitated, and contact with the fuse can be effectively avoided.
Furthermore, since the neutral point circuit is configured on the side surface of the base plate on the capacitor side, a cover for insulating the neutral point circuit from the main circuit configured on the side surface opposite to the capacitor side of the base plate becomes unnecessary. The number of parts and man-hours can be reduced.

Embodiments that are the best mode of the present invention will be described below with reference to FIGS.
Note that terms such as front, rear, left and right used in the following description refer to front, rear, left and right when the vehicle forward direction is the front.

  As shown in FIG. 1, the high-voltage electrical equipment cooling device 1 according to this embodiment is mounted under the rear seat 7 with its longitudinal direction along the vehicle width direction, and the configuration thereof is as shown in the schematic diagram of FIG. , A PDU (inverter) 3 that controls the motor 2 for traveling, a battery (vehicle power storage device) 10 that supplies power to the motor 2 via the PDU 3, and a DC / DC converter (step-down device) that steps down the power supply voltage of the battery 10 ) 4, the fan 6 that guides the cooling air to the high-voltage equipment such as the battery 10, the DC / DC converter 4, and the PDU 3, and the upstream side (inlet) of the cooling air from the vent 18 of the battery 10 in the flow direction of the heat sinks 31 and 41. A first ventilation duct 51 that circulates to the side) and a second ventilation duct that circulates cooling air from the downstream side (outlet side) in the flow direction of the heat sinks 31 and 41 to the suction port side of the fan 6. And 2, and a frame 8 which all are intensively integrally fixed.

As shown in FIG. 4, the frame 8 passes through the lower surface of the battery 10, passes through the sides of the heat sinks 31 and 41 integrally fixed to the PDU 3 and the DC / DC converter 4, and further passes through the fan 6. It is bent to pass through the lower surface.
Also, the battery 10, the first ventilation duct 51, the PDU 3, the DC / DC converter 4, the second ventilation duct 52, and the fan 6 are arranged in a substantially straight line in this order both in the plan view of FIG. 2 and the front view of FIG. Yes.

The PDU 3 is a power drive unit as a motor control unit mainly composed of an inverter circuit. When power is supplied from the battery 10 of the DC power supply to the motor 2 for traveling, the PDU 3 is converted from DC to AC by the PDU 3. In addition, when the engine output or a part of the kinetic energy of the vehicle is stored in the battery 10 via the motor 2, the PDU 3 converts the alternating current into direct current and stores it. Since the direct-current voltage converted by the PDU 3 is high voltage, a part thereof is stepped down by the DC / DC converter 4.
The PDU 3 and the DC / DC converter 4 are fixed to the frame 8 so that the heat sinks 31 and 41 that are integrally fixed to each other are opposed to each other with a space therebetween, and the cooling air that passes through the heat sinks 31 and 41 is the vehicle width. Circulate in the direction.

As shown in FIG. 1, the first ventilation duct 51 has a combined duct structure composed of a lower duct 51a and an upper duct 51b that can be disassembled and assembled. When the lower duct 51a and the upper duct 51b are assembled and integrally joined to the frame 8, the battery protection function unit 9 is surrounded from the outside, and thereby, the first heat sink 31 and the second heat sink are provided from the lower vent hole 18. Thus, a cooling air passage toward 41 is secured.
The mating surfaces of the lower duct 51a and the upper duct 51b are hermetically sealed by, for example, a labyrinth effect.

As shown in FIG. 4, the battery 10 has an internal battery box in which an upper surface portion 11a, a lower surface portion 11b, left and right side surface portions 12a and 12b, a front surface portion 13a, and a rear surface portion 13b are assembled in a box shape. The module group (capacitor) 14 is housed in the battery pack, and the battery protection function unit 9 is mounted on the base plate 20 coupled to the right side surface (support frame) 12b.
The module group 14 includes a plurality of power storage modules 14a in which a plurality of cells are connected in series, and the power storage modules 14a are fixed by grommets and arranged in parallel in a staggered manner at intervals.

The battery 10 is sub-assembled in advance and fixed to the frame 8. The upper surface portion 11 a, the lower surface portion 11 b, the front surface portion 13 a, and the rear surface portion 13 b are attached to the frame 8 by bolts 15 penetrating them vertically. It is fixed by tightening.
As a result, the fixing between the surface portions 11a to 13b and the fixing to the frame 8 are performed at the same time, and the number of fastening parts and the number of assembling steps required for the subassembly are reduced accordingly.

  A plurality of ventilation holes 18 are formed in the upper surface portion 11a and the lower surface portion 11b, and cooling air flows into the battery 10 from the ventilation holes 18 formed on the upper surface side of the battery 10 when the fan rotates. The cooling air passes through the battery 10 along the thickness direction (from the upper surface portion 11a side to the lower surface portion 11b side), and is then guided to the lower duct 51a of the first ventilation duct 51 to cause PDU3 and DC / Distributes to the DC converter 4 side.

As shown in FIG. 11, the right side surface portion of the battery 10, that is, the side surface portion 12b facing the PDU 3 and the DC / DC converter 4 side, is a frame portion 96 that supports the right end portion of the module group 14, and terminal portions T1 to T4. And a plate portion (surface for supporting the terminals of the battery) 97 for supporting the battery so as to face outward. And the base plate 20 is couple | bonded with the side part 12b of the battery 10 so that it may oppose.
The base plate 20 includes a battery protection function unit 9 such as a main switch 121, a main fuse 122, a battery current sensor 124 for overcurrent detection, and a contactor 123 that shuts off the output circuit of the battery 10 when overcurrent is detected by the battery current sensor 124. Are integrated and installed.

In the circuit diagram of the battery protection function unit 9 shown in FIG. 5, the battery 10 is composed of a first module part (72 volts) 111 and a second module part (72 volts) 112. The module portion 112 is connected in series through the bus plate D on the base plate 20, the main switch 121, the bus plate E, the main fuse 122, and the bus plate C.
The base plate 20 and each of the first module portion 111 and the second module portion 112 are connected through terminal portions T1 to T4. On the other hand, the base plate 20 and each of the PDU 3 and the DC / DC converter 4 are connected through terminal portions T5 to T8.

A contactor 123 is provided between the positive terminal portion T1 on the battery 10 side and the terminal portion T5 on the PDU3 side. The contactor 123 opens and closes the high-voltage circuit and functions to protect against overcurrent. The contactor 123 includes a main contactor 123A, a precharge contactor 123B, and a precharge resistor 123C connected in parallel to each other.
A battery current sensor 124 for detecting a current flowing from the battery 10 is provided between the terminal portion T1 and the contactor 123, and a PDU for detecting a current input to the PDU 3 is provided between the contactor 123 and the terminal portion T5. A current sensor 125 is provided. Furthermore, a DC / DC converter fuse 126 for short-circuit protection of the DC / DC converter 4 is provided between the contactor 123 and the terminal portion T7.

The negative terminal portion T4 on the battery 10 side, the terminal portion T6 on the PDU3 side, and the terminal portion T8 on the DC / DC converter 4 side are connected to the ground through a capacitor 127 for reducing radio noise. The terminal portion T1 is connected to the ground through the capacitor 128.
The main switch 121 and the main fuse 122 are connected between a neutral point terminal portion (negative electrode at the neutral point) T2 and a neutral point terminal portion (positive electrode at the neutral point) T3. The main switch 121 opens and closes the battery 10 and is manually shut off during maintenance.

With the above circuit configuration, when the battery 10 is connected to the PDU 3 and the DC / DC converter 4, the main switch 121 is turned on. After the main switch 121 is turned on, the precharge contactor 123B is first turned on by the command from the battery ECU 21 to close the precharge circuit. The current flowing through the precharge circuit is limited by the precharge resistor 123C. Subsequently, the main contactor 123A is turned on by a command from the battery ECU 21, and the main circuit is closed.
Thus, welding of the main contactor 123A is prevented because the current is limited by the precharge circuit.

Next, the configuration of the base plate 20 and the arrangement of the battery protection function unit 9 on the base plate 20 will be described with reference to the drawings of FIGS.
As shown in FIG. 8, the side plate 20A of the base plate 20 facing the battery 10 is connected to a recess 91 that is recessed from the base surface 90, through holes 92a, 92b, 92c, and 92d, and the recess 91 and the through holes 92a and 92b. Grooves 93a and 93b extending so as to be formed are formed.
The concave portion 91 is formed in a corner portion of the base plate 20 having a rectangular shape in plan view (in this embodiment, the upper left corner portion as viewed from the battery 10 side). As shown in FIG. The main switch 121 and the main fuse 122 are accommodated.

In the recess 91, the main switch 121 is disposed outside the base plate 20 with respect to the main fuse 122. That is, the main switch 121 is disposed close to the upper surface 20B side of the base plate 20 in this embodiment so that the manual operation portion 121a protrudes from the outer surface of the base plate 20 and can be externally operated. On the other hand, the main fuse 122 is disposed so as to be farther from the inside of the base plate 20 than the main switch 121, that is, from the upper surface 20B side from which the manual operation unit 121a protrudes.
With the above configuration, during maintenance or the like, an operation from the outside of the main switch 121 is facilitated, and contact with the main fuse 122 can be effectively avoided.

The through holes 92a, 92b, 92c, and 92d are respectively provided with a neutral point terminal portion T2, a neutral point terminal portion T3, a negative terminal portion T4, and a positive terminal portion T1 supported by the plate portion 97 of the battery 10 in this order. It can be accommodated.
A bus plate (plate-like conductive member) D that connects the neutral point terminal portion T2 of the battery 10 to the terminal 130d at one end of the main switch 121 is accommodated in the concave groove 93a. Further, a bus plate (plate-like conductive member) C that connects the neutral point terminal portion T3 of the battery 10 to the terminal 130a at one end of the main fuse 122 is accommodated in the concave groove 93b. A bus plate (plate-like conductive member) E that connects between the terminal 130 b at the other end of the main fuse 122 and the terminal 130 c at the other end of the main switch 121 is provided in the recess 91.

On the other hand, on the side surface 20C of the base plate 20 opposite to the battery 10, as shown in FIGS. 6 and 7, a convex portion standing upright from a base surface (region not facing the concave portion) 100 corresponding to the back surface of the base surface 90. 101 is formed.
A battery current sensor 124, a main contactor 123A of the contactor 123, and a precharge contactor 123B are disposed on the base surface 100 of the side surface 20C excluding the convex portion 101. On the other hand, the upper surface 101A of the convex portion 101 (region facing the concave portion) has a pre-dimension lower than the battery current sensor 124, the main contactor 123A, and the precharge contactor 123B mounted on the base surface 100. A charge resistor 123C and a DC / DC converter fuse 126 are arranged.

With the above arrangement, as shown by the two-dot chain line in FIG. 10, the battery protection function unit 9 mounted on the base plate 20 has a relatively large part and a smaller part. Since the height variation between them is made uniform, the handleability of the battery 10 can be improved, and the space in the high piezoelectric equipment cooling device 1 can be effectively utilized.
Further, the main switch 12 is provided on the side surface 20A of the base plate 20 on the module group 14 side.
1, the neutral point circuit 9a including the main fuse 122 and the bus plates C, D, and E is configured. The neutral point circuit 9a is configured on the side surface 20C of the base plate 20 opposite to the module group 14 side. Thus, a cover for insulating from the main circuit 9b including the contactor 123, the battery current sensor 124 and the like becomes unnecessary, and the number of parts and man-hours can be reduced.

  As shown in FIG. 3, the high-voltage equipment cooling device 1 configured as described above is formed on the vehicle body body 71 by aligning the longitudinal direction of the high-voltage equipment cooling device 1 with the vehicle width direction, for example, below the seat cushion 7 a of the rear seat 7. It is fixed with screws. Then, a cooling air inlet 73 is formed between the lower surface 72 of the rear seat 7 in the vehicle width direction (right side in FIG. 3), that is, the lower surface 72 of the seat cushion 7a at one end in the vehicle width direction and the vehicle body 71. A cooling air outlet 74 is formed below the other end of the rear seat 7 in the vehicle width direction, that is, between the lower surface 72 of the seat cushion 7a at one end in the vehicle width direction and the vehicle body 71.

  When the fan 6 is rotated, as shown by the arrow in FIG. 3, the cooling air in the passenger compartment passes through the cooling air inlet 73 formed on one end side below the seat cushion 7 a and the upper surface of the battery 11 and the seat cushion 71 a. Flows into the gap with the lower surface 72 of the battery 11 and is introduced into the battery 11 from the vent 18 formed in the upper surface portion 11 a of the battery 11. This cooling air mainly flows downward in the battery 11 and flows out from the vent 18 formed in the lower surface portion 11 b to the lower surface portion 54 of the first ventilation duct 51.

The cooling air that has flowed out to the lower surface portion 54 circulates along the longitudinal direction of the high voltage electrical equipment cooling device 1, and the first ventilation duct 51, the heat sink 31 of the PDU 3, the heat sink 41 of the DC / DC converter 4, the second ventilation duct 52, After passing through the fan 6, the air is exhausted to the trunk room through the cooling air outlet 74 under the seat cushion 7 a.
When the cooling air flows in the above order, the battery 10, the battery protection function unit 9, the PDU 3 and the DC / DC converter 4 in the first ventilation duct 51 exchange heat with the circulating cooling air via the heat sinks 31 and 41, respectively. It is cooled while performing.

In other words, high voltage equipment such as the battery 10 and the PDU 3 is centrally packaged and stored under the rear seat 7, so that it is possible to adopt a structure that tilts the rear seat 7 (so-called trunk-through) and avoids a decrease in utilities. it can. Further, since the high-voltage equipment is not located under the trunk room or the floor, the trunk room space and the foot space can be secured.
Furthermore, since the high-voltage equipment is located indoors, the seat seat surface does not rise due to securing the ground height, and the occupant is less likely to feel the blockage in the height direction.

In addition, this invention is not limited to the said Example, A various design change is possible in the range which does not deviate from the summary.
For example, in the above embodiment, the high-voltage electrical equipment cooling device 1 is mounted under the rear seat 7, but it may be mounted under the front seat 75 as indicated by a two-dot chain line in FIG. 1.

It is a figure which shows the mounting position to the vehicle of the high piezoelectric equipment cooling device which concerns on this invention. It is a figure which shows typically the structure of the high piezoelectric equipment cooling device. It is a figure which shows the distribution | circulation state of the cooling air in the same high piezoelectric equipment cooling device. It is a perspective view which shows one structural example of the same high piezoelectric equipment cooling device. It is a circuit diagram of a battery protection function part. It is a perspective view which shows the side surface on the opposite side to the battery of a base plate. It is a perspective view which shows the state in which a part of battery protection function part was mounted in the side surface on the opposite side to the battery of a baseplate. It is a perspective view which shows the side by the side of the battery of a base plate. It is a perspective view which shows the state in which a part of battery protection function part was mounted in the side by the side of the battery of a baseplate. It is a side view of the baseplate in which the battery protection function part was mounted. It is a perspective view which shows the side part by the side to which the base plate of a battery is couple | bonded.

Explanation of symbols

1 High-voltage equipment cooling device 2 Motor 3 PDU (inverter)
4 DC / DC converter (step-down device)
6 Fan 9 Battery protection function unit 10 Battery (Vehicle power storage device)
12b Side (support frame)
14 Module group (capacitor)
20 Base plate 20A, 20C Side surface 91 Recessed portion (recessed portion, recessed groove)
93a, 93b Groove 97 Plate part (surface supporting the terminal of the battery)
100 Base surface (region not facing the recess)
121 Main switch 122 Main fuse (fuse)
124 battery current sensor (sensor means)
123 Contactor (contactor means)
C, D, E Bus plate (plate-like conductive member)
T1 Plus terminal part T2 Neutral point terminal part (negative electrode at the neutral point of the battery)
T3 Neutral point terminal (positive electrode at the neutral point of the battery)
T4 Negative terminal

Claims (4)

A capacitor that feeds power to a motor for driving via an inverter, a support frame that includes a surface that supports the capacitor and supports a terminal of the capacitor, and is coupled to the support frame so as to face the surface of the support frame A battery protection function unit comprising: a base plate formed on the base plate; a main switch provided on the base plate; a fuse; a sensor means for detecting overcurrent; and a contactor means for cutting off the output circuit of the battery when overcurrent is detected by the sensor means; In the vehicle power storage device in which the terminal extends on the base plate and is connected to the battery protection function unit,
A recess is provided on a side surface of the base plate on the capacitor side, the main switch and the fuse are accommodated in the recess, and the sensor means and the region on the side surface of the base plate opposite to the capacitor are not opposed to the recess. A vehicle power storage device comprising contactor means.   The power storage device for a vehicle according to claim 1, wherein the fuse is disposed inside and the main switch is disposed outside.   2. A plate-like conductive member that connects a positive electrode and a negative electrode at a neutral point of the capacitor to the main switch is disposed in a concave groove formed on a side surface of the base plate on the capacitor side. Vehicle power storage device. An inverter that controls a motor for traveling; a capacitor that feeds power to the motor via an inverter; a step-down device that steps down a power supply voltage of the capacitor; and a fan that guides cooling air to the capacitor and the inverter, A cooling device for a high voltage electrical equipment for a vehicle motor in which a capacitor, the inverter, the step-down device, and the fan are intensively arranged under a seat,
A support frame including a surface for supporting the capacitor and supporting a terminal of the capacitor; a base plate coupled to the support frame so as to face the surface of the support frame; and a main switch provided on the base plate; A battery protection function unit comprising a fuse, an overcurrent detection sensor means, and a contactor means for interrupting the output circuit of the battery when an overcurrent is detected by the sensor means;
The terminal extends on the base plate and is connected to the battery protection function unit, and a main switch and a fuse are accommodated in the concave portion provided on a side surface of the base plate on the capacitor side, and is opposite to the capacitor on the base plate. A cooling device for a high voltage electrical equipment for a vehicle motor, wherein the sensor means and the contactor means are arranged in a region of the side face of the vehicle that does not face the recess.

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