JP5935988B2 - Vehicle power supply system - Google Patents

Description

  The present invention relates to a vehicle power supply system, and in particular, an electric motor that is disposed in a motor room and drives wheels, and a battery that is disposed in front of or behind the motor room and supplies electric power to the electric motor, The present invention relates to a power supply system for a vehicle that is mounted on a vehicle having a battery and supplies power from a battery to the outside of the vehicle.

  Conventionally, vehicles such as electric vehicles and hybrid vehicles that supply electric power from a battery to an electric motor and drive wheels by the electric motor are known.

  In these electric vehicles and hybrid vehicles, in recent years, a vehicle power supply system for supplying electric power from a battery to the outside of the vehicle has also been proposed. For example, a power system configured to be able to transfer power between a vehicle and a power line in a house via a connection device is known (Patent Document 1).

  There is also known a power supply system that supplies power from a battery of an electric vehicle to an external system facility via a power supply facility installed in a parking space (Patent Document 2).

JP 2008-054439 A JP 2007-252117 A

  By the way, if an external facility such as a power supply facility is used, places where power is supplied are limited. In order to supply power at any place without going through external equipment, an inverter that converts a direct current supplied from a battery into an alternating current of a commercial power supply voltage (for example, 100 V), or a direct current from the battery to the inverter It is necessary to mount electrical components such as a switching device (junction box) for switching supply on the vehicle.

  In this case, a high voltage (for example, 300 V) current is supplied from the battery to the junction box connected to the battery or the power cable connecting the battery and the junction box. For this reason, for example, when these junction boxes and power cables are damaged in the event of a vehicle collision and the high voltage circuit and power cable conductors inside the junction box are exposed, contact with these exposed high voltage circuits and conductors, or There is a possibility that an electric shock accident may occur due to leakage to the vehicle body structure.

  However, in the conventional system as described above, no consideration is given to the configuration and specific arrangement of various electrical components necessary for supplying power from the battery to the outside of the vehicle. Therefore, there is a possibility that electrical components such as the junction box and the power cable described above, in which a high voltage current is supplied from the battery, may not be properly arranged so as to ensure safety even in the event of a collision. As described above, in the conventional vehicle power supply system, there is room for further improvement with respect to safety when a collision accident occurs.

  The present invention has been made to solve the above-described problems of the prior art, and can directly supply power from a vehicle battery to a home appliance without going through external equipment such as power supply equipment, And it aims at providing the electric power feeding system for vehicles which can improve the safety | security at the time of a collision.

In order to achieve the above object, according to the present invention, a vehicle power supply system is arranged in a motor room, and drives an electric motor for driving wheels, in front of the motor room located at the rear of the vehicle body or in front of the vehicle body. is spaced behind the motor room located in part, a battery that supplies electric power to the electric motor is mounted on a vehicle having, a vehicle power supply system for supplying power from the battery to the outside of the vehicle A box-shaped rigid member disposed in the motor room, an inverter that converts a direct current supplied from the battery into an alternating current, a control device that controls the supply of the alternating current converted by the inverter to the outside of the vehicle, and a switching device for switching the supply of the direct current from the battery to the inverter, the switching device is in the motor room, in the upper or lower rigid member Characterized in that it is arranged in front of the rear end of the rear and the rigid member from the front end of the rigid member.
In the present invention configured as described above, even when the structural member of the vehicle body is deformed toward the switching device at the time of the collision of the vehicle, the shock is first absorbed by the rigid member, so that the switching device is damaged at the time of the collision. The possibility can be reduced, and safety at the time of collision can be improved.
In addition, box-shaped electrical components and various devices mounted on the vehicle together with the switching device can be used as the rigid member, and switching can be performed at the time of a vehicle collision without providing a new rigid member for protecting the switching device. The possibility of damage to the device can be reduced, and the safety at the time of collision can be improved.
Further, the switching device can be more reliably protected by the rigid member at the time of a vehicle collision, and the safety at the time of the collision can be further improved.

In the present invention, preferably, the switching device is provided so as to connect the pair of left and right side frames provided in the vehicle along the front-rear direction and the pair of left and right side frames along the vehicle width direction. It is arranged in a region surrounded by a pair of front and rear cross members.
In the present invention configured as described above, when the vehicle collides, the impact is absorbed by the deformation of the side frames and the cross member. Therefore, the switching device can be prevented from being damaged, and the safety at the time of the collision can be prevented. Property can be further improved.

In the present invention, it is preferable that the rigid member is a motor inverter that converts a direct current supplied from the battery into an alternating current and supplies the alternating current to the electric motor, or a battery charger that charges the battery.
In the present invention configured as described above, even when a vehicle body component is deformed toward the switching device at the time of a vehicle collision, the shock is first absorbed by the motor inverter or the battery charger. The possibility of damage to the device can be reduced, and the safety at the time of collision can be improved.

Moreover, in this invention, Preferably, it has a power cable which connects a battery and a switching device, and the power cable is wired between the battery and the switching device.
In the present invention configured as described above, the power cable does not protrude further forward of the switching device arranged in front of the battery, or does not protrude further rearward of the switching device arranged behind the battery. Thus, the possibility that the power cable is damaged by the deformed vehicle body structural member or the like at the time of the collision of the vehicle can be reduced, and the safety at the time of the collision can be improved.

  According to the vehicle power supply system of the present invention, it is possible to directly supply electric power from a vehicle battery to a home electric appliance without going through external equipment such as power supply equipment, and to improve safety in the event of a collision. Can do.

1 is a schematic plan view showing an overall structure of a vehicle on which a vehicle power feeding system according to an embodiment of the present invention is mounted. It is a schematic block diagram of the vehicle carrying the vehicle electric power feeding system by embodiment of this invention. It is a schematic plan view which shows the front part structure of the vehicle carrying the vehicle electric power feeding system by embodiment of this invention. It is the IV-IV arrow line view of FIG. 3 which shows the front part structure of the vehicle carrying the vehicle electric power feeding system by embodiment of this invention.

Hereinafter, a vehicle power supply system according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, a vehicle equipped with a vehicle power supply system according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic plan view showing the overall structure of a vehicle equipped with a vehicle power supply system according to an embodiment of the present invention.

  As shown in FIG. 1, a vehicle 1 equipped with the vehicle power supply system according to the present embodiment is an electric vehicle equipped with a motor unit as a power source. A pair of left and right floor side frames 2a and 2b extending in the front-rear direction are provided at the vehicle body center portion below the passenger compartment floor of the vehicle 1. A left side sill 4a extending in the front-rear direction is formed on the left side of the left floor side frame 2a, and a right side sill 4b extending in the front-rear direction is formed on the right side of the right floor side frame 2b.

  Further, a pair of left and right front side frames 8a and 8b are provided forward from the front ends of the left and right floor side frames 2a and 2b on both sides in the vehicle width direction of the motor room 6 at the front of the vehicle body (in front of the vehicle compartment). It is provided so that it may extend. Further, a pair of front and rear front cross members 10a and 10b are provided along the vehicle width direction so as to connect the pair of left and right front side frames 8a and 8b before and after the motor room 6.

  A pair of left and right rear side frames 12a and 12b are provided on both sides in the vehicle width direction of the rear portion of the vehicle body of the vehicle 1 (that is, the rear of the passenger compartment) so as to extend rearward from the rear ends of the side sills 4a and 4b. Further, a rear cross member 14 is provided along the vehicle width direction so as to connect the pair of left and right rear side frames 12a and 12b.

  Furthermore, a battery mounting frame 16 is provided from the center to the rear of the vehicle body. The battery mounting frame 16 has a front mounting portion 16a extending in the front-rear direction between the left and right floor side frames 2a, 2b, and a rear mounting portion 16b extending on both sides in the vehicle width direction at the rear end of the front mounting portion 16a. The front mounting portion 16a and the rear mounting portion 16b are formed so as to have a substantially T shape in plan view. The battery 18 is mounted on the battery mounting frame 16 below the passenger compartment floor.

  Further, in the motor room 6, a motor that drives the drive wheels 20 (left and right front wheels in the example of FIG. 1) between the pair of left and right front side frames 8a and 8b and between the pair of front and rear front cross members 10a and 10b. A unit 22 is mounted. Furthermore, the motor inverter 24, the junction box 26, and the battery charger 28 are disposed between the pair of left and right front side frames 8a and 8b and between the pair of front and rear front cross members 10a and 10b. Details of the arrangement of these electrical components in the motor room 6 will be described later.

  An inverter 30 and a control box 32 are installed in the rear part of the vehicle body (for example, a trunk room). For example, the inverter 30 and the control box 32 are housed in a recess formed in the floor at the rear of the vehicle body. The power cable 34 that connects the inverter 30 and the junction box 26 is routed along the battery 18 on the lower surface side of the passenger compartment floor.

  A charging receptacle 36 is provided on the left side of the rear part of the vehicle body. The charging receptacle 36 is connected to the battery charger 28 via a charging cable 38. The charging cable 38 is routed along with the battery 18 along with the power cable 34 on the lower surface side of the passenger compartment floor.

  Next, with reference to FIG. 2, an electrical configuration of a vehicle equipped with the vehicle power supply system according to the embodiment of the present invention will be described. FIG. 2 is a schematic block diagram of a vehicle equipped with a vehicle power supply system according to an embodiment of the present invention.

  As shown in FIG. 2, the junction box 26 is connected to the battery 18, the motor inverter 24, and the inverter 30, and supplies a high voltage (for example, 300 V) direct current from the battery 18 to the motor inverter 24 and the inverter 30. Is switched. For example, the junction box 26 supplies DC current from the battery 18 to the motor inverter 24 and the inverter 30 based on the control of a vehicle control module (VCM: Vehicle Control Module) that controls various systems mounted on the vehicle 1. Alternatively, supply of direct current from the battery 18 to the motor inverter 24 and the inverter 30 is cut off.

  The motor inverter 24 converts a direct current supplied from the battery 18 through the junction box 26 into an alternating current and supplies the alternating current to the motor unit 22. The driving force generated by the motor unit 22 is transmitted to the drive wheels 20 through a power transmission mechanism such as a transaxle.

  The battery charger 28 charges the battery 18 with electric power supplied from a power source external to the vehicle 1 (for example, a household power source of 100 V or 200 V) via the charging receptacle 36 and the charging cable 38. That is, the battery 18 is charged via the charging cable 38 and the battery charger 28 by connecting a charging plug provided at the tip of a charging cord drawn from an external power source such as a charging stand to the charging receptacle 36.

  The inverter 30 is connected to the junction box 26 via the power cable 34. The inverter 30 converts a direct current supplied from the battery 18 via the junction box 26 and the power cable 34 into an alternating current of a commercial power supply voltage (for example, 100 V) and outputs the alternating current to the control box 32.

  The control box 32 is connected to the inverter 30 and controls the supply of the alternating current converted by the inverter 30 to the outside of the vehicle. The control box 32 is provided with an outlet. The alternating current supplied from the inverter 30 to the control box 32 is directly supplied to home appliances and the like outside the vehicle via this outlet.

  Next, details of the arrangement of electrical components in the motor room 6 will be described with reference to FIGS. 3 and 4. FIG. 3 is a schematic plan view showing a front structure of a vehicle on which the vehicle power supply system according to the embodiment of the present invention is mounted. FIG. 4 is a front view of the vehicle on which the vehicle power supply system according to the embodiment of the present invention is mounted. It is the IV-IV arrow directional view of FIG. 3 which shows a partial structure.

  As shown in FIG. 3 and FIG. 4, in the vehicle width direction between the left and right front side frames 8 a and 8 b on the front upper side of the motor unit 22 disposed in the motor room 6 and behind the front cross member 10 a on the front side. A front stay 40 is provided to extend to the front. Both ends of the front side stay 40 are fixed to the left and right front side frames 8a and 8b. In addition, a rear stay 42 extending in the vehicle width direction is provided between the left and right front side frames 8a and 8b in front of the front cross member 10b on the rear upper side and on the rear side of the motor unit 22. Both ends of the rear stay 42 are fixed to the suspension towers 44 of the left and right front wheels. Above the motor unit 22, a motor inverter 24, a battery charger 28, and a junction box 26 are attached between the front stay 40 and the rear stay 42.

  The motor inverter 24 has an inverter case 24a as a rigid member formed in a substantially box shape, and an inverter circuit accommodated in the inverter case 24a. The motor inverter 24 is disposed above the motor unit 22, the front end of the inverter case 24 a is fixed to the front stay 40, and the rear end of the inverter case 24 a is fixed to the rear stay 42.

  The battery charger 28 has a battery charger case 28a as a rigid member formed in a substantially box shape, and a charging circuit accommodated in the battery charger case 28a. The battery charger 28 is disposed above the motor unit 22 and adjacent to the motor inverter 24, the front end of the battery charger case 28 a is fixed to the front stay 40, and the rear end of the battery charger case 28 a is connected to the rear stay 42. Fixed.

  The junction box 26 is disposed above the motor unit 22 and below the battery charger 28, and is fixed to the front stay 40 and the rear stay 42 via a plate-shaped bracket 26a. The length of the junction box 26 in the front-rear direction is formed to be shorter than the length of the battery charger 28 in the front-rear direction.

  The junction box 26 is connected to the battery 18 by a power cable 46, and a high-voltage (for example, 300 V) direct current is supplied from the battery 18 through the power cable 46. The power cable 46 is routed between the battery 18 and the junction box 26. More specifically, one end of the power cable 46 is connected to a connection terminal 18 a provided at the front end of the battery 18, and the other end of the power cable 46 is connected to a connection terminal 26 b provided at the rear end of the junction box 26. Has been. The power cable 46 is routed so as to connect between the connection terminal 18 a of the battery 18 and the connection terminal 26 b of the junction box 26.

  Next, the effect by the vehicle electric power supply system of this embodiment mentioned above is demonstrated.

  First, the vehicle power supply system includes an inverter 30 that converts a direct current supplied from the battery 18 into an alternating current, and a control box 32 that controls the supply of the alternating current converted by the inverter 30 to the outside of the vehicle. Therefore, electric power can be directly supplied from the battery 18 of the vehicle 1 to the home appliance without using external equipment such as power supply equipment.

  Further, since the junction box 26 is disposed below the battery charger 28 as a rigid member formed in a box shape in the motor room 6, the front side frames 8 a and 8 b and the front cross are used when the vehicle 1 collides. Even when the members 10a and 10b are deformed toward the junction box 26, since the impact is first absorbed by the battery charger 28, the junction box 26 is not provided with a new rigid member for protecting the junction box 26. The possibility of damage can be reduced, and safety at the time of collision can be improved.

  Further, since the length of the junction box 26 in the front-rear direction is formed to be shorter than the length of the battery charger 28 in the front-rear direction, the junction box 26 can be more reliably protected by the battery charger 28 in the event of a collision. Can do.

  The junction box 26 includes a pair of left and right front side frames 8a and 8b and a pair of front and rear front cross members 10a and 10b provided to connect the front side frames 8a and 8b along the vehicle width direction. Arranged in the enclosed area. Therefore, when the vehicle 1 collides, first, the front side frames 8a and 8b and the front cross members 10a and 10b are deformed to absorb the shock, so that the junction box 26 can be prevented from being damaged, Safety at the time can be improved.

  Further, since the power cable 46 is routed so as not to protrude in front of the junction box 26, a member (for example, a deformed front cross member 10a) that enters the motor room 6 from the front when the vehicle 1 collides front. 10b, etc.) can reduce the possibility of damage to the power cable 46, and improve the safety at the time of collision.

Finally, a modification of the embodiment according to the present invention will be described.
3 and 4, the case where the junction box 26 is disposed below the battery charger 28 has been described. However, the junction box 26 may be disposed above the battery charger 28.

  Further, the junction box 26 may be disposed below or above the motor inverter 24 or other electrical component as a rigid member. In this case, it is desirable that the length of the junction box 26 in the front-rear direction is shorter than the length of the rigid member in the front-rear direction.

  Further, the junction box 26 may be disposed behind the battery charger 28 or the motor inverter 24 as a rigid member. Even in this case, when the front side frames 8a and 8b and the cross member are deformed toward the junction box 26 at the time of the collision of the vehicle 1, first, rigid members such as the battery charger 28 and the motor inverter 24 absorb the shock. The possibility that the junction box 26 is damaged can be reduced.

  1 to 4 exemplify the case where the motor room 6 is located at the front of the vehicle 1 (front of the vehicle compartment), the motor room 6 is located at the rear of the vehicle 1 (rear of the vehicle compartment). The present invention can also be applied to a certain vehicle 1 as in the above-described embodiment. In this case, a pair of front and rear rear cross members are provided along the vehicle width direction so as to connect the pair of left and right rear side frames 12a and 12b before and after the motor room 6 positioned behind the battery 18 at the center of the vehicle body. It shall be. A motor inverter 24 is provided in a region surrounded by the pair of left and right rear side frames 12a and 12b and the pair of front and rear rear cross members provided so as to connect the pair of left and right side frames along the vehicle width direction. The battery charger 28 is disposed, and the junction box 26 is disposed above, below, or in front of the motor inverter 24 and the battery charger 28 as rigid members. Thus, as in the above-described embodiment, when the vehicle 1 collides, first, the impact is absorbed by the rear side frames 12a and 12b, the rear cross member, the battery charger 28 as a rigid member, the motor inverter 24, or the like. The junction box 26 can be prevented from being damaged.

  Also, the present invention can be applied to a hybrid vehicle equipped with a motor unit 22 and an engine as a power source, as in the above-described embodiment.

DESCRIPTION OF SYMBOLS 1 Vehicle 2a, 2b Floor side frame 4a, 4b Side sill 6 Motor room 8a, 8b Front side frame 10a, 10b Front cross member 12a, 12b Rear side frame 14 Rear cross member 16 Battery mounting frame 16a Front mounting part 16b Rear mounting part 18 Battery 18a Connection terminal 20 Drive wheel 22 Motor unit 24 Motor inverter 24a Inverter case 26 Junction box 26a Bracket 26b Connection terminal 28 Battery charger 28a Battery charger case 30 Inverter 32 Control box 34, 46 Power cable 36 Charging receptacle 38 Charging cable 40 Front side Stay 42 Rear stay 44 Suspension tower

Claims (4)

An electric motor disposed in a motor room and driving a wheel; and an electric motor disposed in front of the motor room located at a rear part of the vehicle body or a rear part of the motor room located at a front part of the vehicle body. A vehicle for supplying electric power to the vehicle, and for supplying electric power from the battery to the outside of the vehicle,
A box-shaped rigid member disposed in the motor room;
An inverter that converts a direct current supplied from the battery into an alternating current;
A control device for controlling supply of alternating current converted by the inverter to the outside of the vehicle;
A switching device that switches the supply of direct current from the battery to the inverter;
In the motor room, the switching device is disposed above or below the rigid member behind the front end of the rigid member and ahead of the rear end of the rigid member. system. The switching device includes a pair of left and right side frames provided in the vehicle along the front-rear direction and a pair of front and rear cross members provided to connect the pair of left and right side frames along the vehicle width direction. The vehicle power supply system according to claim 1 , wherein the vehicle power supply system is disposed in a region surrounded by. It said rigid member converts a direct current supplied from the battery into alternating current motor inverter supplied to the electric motor, or vehicle according to claim 1 or 2 is a battery charger for charging the battery Power supply system. Having a power cable connecting the battery and the switching device;
The vehicle power supply system according to any one of claims 1 to 3 , wherein the power cable is routed between the battery and the switching device.

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