JP5254854B2 - Vehicle power supply - Google Patents

Description

  The present invention relates to a power supply device for a vehicle, and more particularly to a device configured by adjoining a plurality of types of power storage means.

In order to reduce fuel consumption in vehicles such as automobiles, it has been proposed to install an idle stop system (ISS) that automatically stops the engine when the vehicle stops and automatically starts the engine in response to a restart operation. ing.
In a vehicle equipped with such a system, in addition to a battery such as a lead storage battery provided in a normal vehicle, a power source such as an electric double layer capacitor (EDLC) is provided, It is known to bear backup power for various electrical components.

  For example, Patent Document 1 describes a power storage module that can be used for such applications, in which a plurality of electrode body units each having a positive electrode and a negative electrode are housed in a frame in an isolated state. ing.

JP 2006-128009 A

Conventionally, auxiliary storage means such as a capacitor for assisting a battery as described above has a storage place in a place different from a battery normally mounted in an engine room, such as a luggage room behind a cabin or a lower side of a seat. In general, it is desirable to install and install a battery, a capacitor, and the like adjacent to each other in consideration of space setting and wiring routing when installed in an existing vehicle. In particular, if the battery and auxiliary power storage means can be arranged together in a space where the battery is mounted in a vehicle of a type that does not have auxiliary power storage means, and can be fixed using an existing battery fixture, the design man-hours can be reduced. There are many merits such as standardization of parts and simplification of the manufacturing process.
However, if multiple types of power storage means such as a battery and a capacitor are housed in the same space as the conventional battery volume, the battery size must be reduced by the same size as the capacitor, and the capacity of the power supply device is insufficient. There are concerns.
An object of the present invention is to provide a vehicle power supply device that can secure the capacity of a power storage unit even when a plurality of types of power storage units are arranged adjacent to each other.

The present invention solves the above-described problems by the following means.
The invention according to claim 1 is a first power storage unit formed in a substantially rectangular parallelepiped shape, and is adjacent to the first power storage unit in a state where the side surface is formed in a substantially rectangular parallelepiped shape and the side surface faces the side surface of the first power storage unit. And the second power storage means disposed on the top surface of the first power storage means and the top surface of the second power storage means, and holds the first power storage means and the second power storage means A power supply device for a vehicle, wherein the second power storage means is the first power storage. A groove portion formed by denting a side surface portion opposite to the means side and extending substantially along the vertical direction is provided, at least a part of the connecting member is accommodated in the groove portion, and the first power storage means is 2 A secondary battery, wherein the second power storage means comprises a capacitor, The second power storage means includes a plurality of modules each having a single cell or a plurality of cells, and the plurality of modules are configured as described above when the side surface portion of the second power storage means provided with the groove is viewed from the front. A power supply device for a vehicle, wherein the power supply device is arranged with a groove portion in between .

According to a second aspect of the invention, before Symbol connecting a plurality of said modules arranged across the groove comprises a bus bar to enable energization, said to an area adjacent to the groove portion, breaking strength than the other portions of the bus bar The vehicular power supply device according to claim 1 , further comprising a weakened portion having a reduced height.

According to the present invention, the following effects can be obtained.
(1) By disposing the connecting member for connecting the holding member to the vehicle body in the groove provided in the second power storage means, the battery fixing tool in the vehicle on which only the battery is mounted is used as it is. As compared with the case where no groove is provided, the dimensions of the first power storage means and the second power storage means in the depth direction of the groove (longitudinal direction of the holding member) can be increased by the depth of the groove. The space for storing the electricity storage means can be increased by utilizing the space on both sides of the connecting member, which has conventionally been a dead space, and the capacity can be secured.
In addition, when the design of an existing vehicle with only a battery is changed and the vehicle power supply device of the present invention is installed, there is no need to newly set a mounting space, a wiring through hole, a fixing point, etc. Since the routing of the vehicle is completed only around the power supply device, the number of steps required for designing and manufacturing the vehicle can be reduced.
(2) Since the secondary battery is used as the first power storage means and the capacitor is used as the second power storage means, even if the size of the secondary battery is reduced with respect to the existing vehicle, By discharging a capacitor suitable for generating a large amount of power in a short time at the same time as the battery, the instantaneous output at the time of starting the engine, for example, can be equal to or higher than that of an existing vehicle, and engine startability can be ensured. it can.
(3) Since the casing of the second power storage means is highly likely to break at the groove when the vehicle collides, the second power storage means is arranged by arranging a plurality of modules while sandwiching the groove. It is possible to prevent each module from being damaged at the time of destruction.
(4) By providing a fragile portion in a region adjacent to the groove portion in the bus bar between the modules sandwiching the groove portion, by breaking the bus bar when the casing of the second power storage means is broken due to a vehicle collision or the like , Can prevent short circuit.

It is the top view which looked at the state which mounted the Example of the power supply device for vehicles to which this invention was mounted in the vehicle from the upper direction. FIG. 2 is a two-side view of a capacitor unit provided in the vehicle power supply device of FIG. 1.

  The present invention is directed to a capacitor unit mounted adjacent to a battery in order to provide a vehicle power supply device capable of securing the capacity of the power storage means even when a plurality of types of power storage means are arranged adjacent to each other. The problem was solved by forming a groove on the side surface and arranging the rod of the fixture in the groove.

Embodiments of a vehicle power supply device to which the present invention is applied will be described below. The vehicle power supply device of the embodiment is mounted on an automobile such as a passenger car equipped with an idle stop system, for example. The vehicle power supply device is disposed in an engine room provided in the front portion of the vehicle body.
FIG. 1 is a plan view of a state in which the vehicle power supply device of the embodiment is mounted on a vehicle as viewed from above.

The power supply device 1 is arranged on the upper side of the main frame 10 of the vehicle and on the rear side of the radiator upper support 20. In addition, a fuse box 30 is disposed on the rear side of the power supply device 1.
The main frame 10 is a structural member of the vehicle that extends substantially along the front-rear direction of the vehicle, and is disposed on each of the left and right sides of the engine room. The power supply device 1 is mounted on, for example, the upper part of the left main frame 10.
The radiator upper support 20 is a horizontal beam-like vehicle body structural member extending substantially along the vehicle width direction. The radiator upper support 20 supports upper portions such as a radiator core and a headlamp unit (not shown).
The fuse box 30 is a resin container that houses a fuse that regulates the maximum supply current to various electrical components of the vehicle.

The power supply device 1 includes a battery 100, a capacitor unit 200, a fixture 300, and the like.
The battery 100 is, for example, a secondary battery such as a lead storage battery, and is charged by an alternator driven by an engine and supplies power to a starter motor and other vehicle electrical components. The battery 100 functions as the first power storage means referred to in the present invention.
The battery 100 has a substantially rectangular parallelepiped shape. As shown in FIG. 1, the upper surface 101 of the battery 100 is formed in a rectangular shape, and its long side direction is inclined with respect to the vehicle width direction so that the outer side in the vehicle width direction is slightly in front of the vehicle. Has been placed.
The battery 100 includes a plus terminal 102 and a minus terminal 103 that protrude from the upper surface 101. The plus terminal 102 is disposed in the vicinity of the corner portion on the vehicle rear side and in the vehicle width direction on the upper surface portion 101. Further, the minus terminal 103 is disposed in the vicinity of a corner portion on the vehicle rear side and the vehicle width direction outer side of the upper surface portion 101.

The capacitor unit 200 includes an electric double layer capacitor (EDLC), and is auxiliary storage means that is charged in a normal state and is discharged when a large current is instantaneously required, for example, when a starter motor is driven. The capacitor unit 200 functions as the second power storage means referred to in the present invention. In the embodiment, when the starter motor is driven, both the battery 100 and the capacitor unit 200 are discharged. As a result, the engine starting performance is ensured even if the battery 100 is downsized relative to the existing vehicle. ing.
The capacitor unit 200 is disposed on the vehicle rear side of the battery 100 and is fixed by a fixture 300 described later in a state of being placed on a tray (not shown).

2 is a two-side view of the capacitor unit 200, FIG. 2 (a) is a plan view seen from above in a vehicle-mounted state, and FIG. 2 (b) is a bb portion in FIG. 2 (a). It is an arrow view.
The capacitor unit 200 includes a casing 210, a first capacitor module 221, a second capacitor module 222, a third capacitor module 223, a fourth capacitor module 224, a first bus bar 231, a second bus bar 232, a third bus bar 233, and a positive terminal 240. The negative terminal 250 is provided.

The casing 210 is a substantially rectangular parallelepiped container (housing) formed of resin, for example. The casing 210 accommodates the first to fourth capacitor modules 221 to 224, the first to third bus bars 231 to 233, and the like.
The casing 210 has an upper surface 211 disposed at substantially the same height as the upper surface 101 of the battery 100. The surface of the casing 210 on the front side of the vehicle faces the surface of the battery 100 on the rear side of the vehicle with a small space therebetween, and is disposed adjacently. The dimension of the casing 210 along the longitudinal direction of the upper surface 101 of the battery 100 is set to be substantially the same as that of the battery 100.

Of the side surfaces of the casing 210, a groove portion 213 is formed on a surface (rear surface) 212 disposed on the vehicle rear side.
The rear surface 212 is disposed to face the fuse box 30 with a space therebetween.
The groove portion 213 is formed by denting the central portion of the rear surface 212 and is arranged extending in the vertical direction. The cross-sectional shape of the groove portion 213 as viewed by cutting along a horizontal plane is formed in a substantially rectangular shape.

Each of the first to fourth capacitor modules 221 to 224 is formed by modularizing a single cell or a plurality of cells of EDLC, and is formed in a substantially prismatic shape extending in the vertical direction.
As shown in FIG. 2, the first to fourth capacitor modules 221 to 224 are arranged in the horizontal direction along the rear surface 212 of the casing 210.
Further, the second capacitor module 222 and the third capacitor module 223 are arranged so as to be distributed on both sides with the groove portion 213 sandwiched when the rear surface 212 of the casing 210 is viewed from the front (normal direction).

  Further, as shown in FIG. 2A, the groove 213 is formed so as to enter between the second capacitor module 222 and the third capacitor module 223 when the capacitor unit 200 is viewed from above. That is, the rear surface portions (the lower surface portion in FIG. 2A) of the first to fourth capacitor modules 221 to 224 are on the side opposite to the battery 100 (see FIG. 2A) than the rear rod 330 described later housed in the groove portion 213. ) And projecting downward).

The first to third bus bars 231 to 233 are sheet metal members that electrically connect the first to fourth capacitor modules 221 to 224. The first to third bus bars 231 to 233 are arranged along the upper surface portions of the first to fourth capacitor modules 221 to 224.
The first bus bar 231 connects the negative electrode of the first capacitor module 221 and the positive electrode of the second capacitor module 222.
The second bus bar 232 connects the negative electrode of the second capacitor module 222 and the positive electrode of the third capacitor module 223. In addition, the 2nd bus-bar 232 is provided with the weak part which is not illustrated in which the fracture | rupture strength was set smaller than the other part in the center part. Such a weak part can be constituted by, for example, partially reducing the thickness of the second bus bar 232 or providing a notch. This weak part is arrange | positioned so that it may overlap with the groove part 213 when the rear surface 212 of the casing 210 is seen from the front.
The third bus bar 233 connects the negative electrode of the third capacitor module 223 and the positive electrode of the fourth capacitor module 224.

The plus terminal 240 and the minus terminal 250 are external output terminals that protrude from the upper surface 211 of the casing 210.
The positive terminal 240 is connected to the positive electrode of the first capacitor module 221.
The negative terminal 250 is connected to the negative electrode of the fourth capacitor module 224.

The fixture 300 includes a holder 310, a front rod 320, a rear rod 330, and the like.
The holder 310 is a substantially strip-shaped holding member that is provided on the upper surface of the battery 100 and the capacitor unit 200 and presses and holds them downward.
The holder 310 extends along the short side direction of the upper surface 101 of the battery 100 and is disposed so as to straddle the central portion of the upper surface 101 of the battery 100 in the long side direction.

The front rod 320 and the rear rod 330 are each formed in a rod shape extending in the vertical direction, the lower end portion is locked to the vehicle body, and the upper end portion is connected to the front end portion and the rear end portion of the holder 310, respectively. It is.
The front rod 320 is disposed along the center portion of the front surface portion of the battery 100.
The intermediate portion of the rear rod 330 is disposed in the groove portion 213 of the capacitor unit 200.
The front rod 320 and the rear rod 330 are formed with screw portions at their upper ends, and these screw portions are inserted into openings formed at both ends of the holder 310 and fastened with nuts.

According to the embodiment described above, the power supply device 1 can be mounted on the vehicle by using the fixture 300 shared with the one that fixes the battery in the vehicle on which only the battery is mounted without mounting the capacitor. At this time, the rear rod 330 of the fixture 300 is accommodated in the groove portion 213 of the capacitor unit 200, so that the spaces on both sides of the rear rod 330, which has conventionally been a dead space, are also changed from the first to fourth capacitor modules 221 to 224. Can be used to increase the capacity of the capacitor unit 200.
Here, the outer shape of the battery B in a vehicle in which no capacitor is mounted is illustrated in FIG. The sum of the dimension L2 of the battery 100 and the dimension L3 of the capacitor unit 200 of the present embodiment is larger than the dimension L1 of the battery B in the longitudinal direction of the holder 310, as compared with the case where such a groove 213 is not provided. It can also be seen that the capacity of the battery 100 and the capacitor unit 200 can be increased.

  Further, according to the embodiment, in addition to the use of the fixture 300 common to a vehicle not equipped with a capacitor, the wiring related to the power supply device is completed around the battery. There is no effect on the arrangement of the through holes and the wiring fixtures.

In addition, since the casing 210 of the capacitor unit 200 of the embodiment is broken so as to be broken starting from the groove 213 at the time of a vehicle collision or the like, the first to fourth capacitor modules 221 arranged with the groove 213 interposed therebetween. The destruction of ~ 224 is prevented.
Further, by providing the weak portion in the second bus bar 232 adjacent to the groove portion 213, the second bus bar 232 is broken when the casing 210 is broken, and the electrical connection between the second capacitor module 222 and the third capacitor module 223 is established. Since it is blocked, it is possible to prevent a short circuit from occurring. This prevents smoke and fire.

(Modification)
The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the technical scope of the present invention.
For example, the detailed configuration of the vehicle power supply device and the shape, material, arrangement, and the like of each member can be changed as appropriate. For example, the direction when the vehicle power supply device is mounted on the vehicle and the mounting location are not particularly limited. The vehicle power supply device according to the embodiment is mounted in the engine room as an example. However, the present invention is not limited to this, and may be applied to, for example, a device disposed in a luggage room behind the cabin. Can do.
Furthermore, the specific configuration of each power storage means is not limited to the lead battery and the electric double layer capacitor, and the number of cells of each power storage means, the arrangement of each cell, and the like are not particularly limited.

DESCRIPTION OF SYMBOLS 1 Power supply device 10 Main frame 20 Radiator upper support 30 Fuse box 100 Battery 101 Upper surface 102 Positive terminal 103 Negative terminal 200 Capacitor unit 210 Casing 211 Upper surface 212 Rear surface 213 Groove 221 First capacitor module 222 Second capacitor module 223 Third capacitor module 224 Fourth capacitor module 231 First bus bar 232 Second bus bar 233 Third bus bar 240 Positive terminal 250 Negative terminal 300 Fixing tool 310 Holder 320 Front rod 330 Rear rod

Claims (2)

First power storage means formed in a substantially rectangular parallelepiped shape;
A second power storage means formed in a substantially rectangular parallelepiped shape and having a side surface opposed to a side surface of the first power storage means; and disposed adjacent to the first power storage means;
A holding member that is provided on an upper surface of the first power storage unit and an upper surface of the second power storage unit, and holds the first power storage unit and the second power storage unit;
A power supply device for a vehicle comprising: a connecting member that protrudes upward from a vehicle body and has an upper end connected to the holding member;
The second power storage means is provided with a groove portion that is formed by denting a side surface portion opposite to the first power storage means side and extends substantially along the vertical direction,
At least a part of the connecting member is accommodated in the groove ,
The first power storage means comprises a secondary battery;
The second power storage means comprises a capacitor;
The second power storage means includes a plurality of modules each having one or a plurality of cells,
The power supply device for a vehicle according to claim 1, wherein the plurality of modules are arranged by being distributed across the groove portion when the side surface portion provided with the groove portion of the second power storage unit is viewed from the front . A bus bar that connects the plurality of modules arranged across the groove and enables energization,
The vehicular power supply device according to claim 1 , wherein a weakened portion having a lower breaking strength than other portions is provided in a region adjacent to the groove portion of the bus bar.

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