JP2007083963A - Battery arrangement structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery arrangement structure capable of suppressing reduction of the crash stroke in a head-on collision due to a battery. <P>SOLUTION: A battery 23 is mounted in a recess 8 extending backwardly from a side of a rear end of a vehicle body, i.e., a rear face part 5a of a rear wheel house 5. A front side breaking member 28 and a rear side breaking member 27 are installed on the rear face part 5a of the rear wheel house 5 and a rear wall 3 of the vehicle body, respectively, so as to hold the battery 23 in the longitudinal direction. The bare 23 is broken by the front and rear breaking members 27, 28 in a rear-end collision. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an arrangement structure for a battery arranged at the rear of a vehicle body of an automobile.

Recent automobiles tend to be equipped with electronic controls and a large number of various electrical components, and since recovery of regenerative energy has been put to practical use, batteries with large capacities tend to be mounted on vehicles. is there. The battery is a relatively heavy object, and in the vehicle design, the battery mounting location is selected so as not to impair the balance between the front and the back of the weight. If necessary, the battery is divided into two parts, and one engine It is mounted in a room and the other one is mounted on the rear part of a vehicle body such as a trunk room. Patent document 1 is disclosing the example which mounted the battery in the vehicle body rear part.
JP-A-11-115808

  Modern automobiles are designed so that the engine compartment located at the front of the vehicle with the cabin in between and the rear of the vehicle, such as the trunk room, serve as a shock absorbing zone in the event of a collision, but the battery is treated as a rigid body in vehicle design. It is. Therefore, when a battery is mounted on the rear part of the vehicle body, it is important to avoid the crash stroke being reduced due to the presence of the battery and the impact absorbing ability being lowered.

  Considering the structure of the battery, the battery case is made of resin, and a number of positive and negative electrode plates are alternately arranged side by side inside the battery case. The inventor of the present invention has come up with the present invention by paying attention to the fact that the battery case is made of resin and the resin can be broken.

  The objective of this invention is providing the battery arrangement | positioning structure which can suppress that the crash stroke at the time of a back collision resulting from a battery reduces.

According to the present invention, the technical problem is
In a battery arrangement structure in which a battery provided with a resin case body is mounted in a recess formed in a floor panel at the rear end of an automobile body,
Provided is a battery arrangement structure in which a destruction member for destroying the battery by deformation of a rear part of a vehicle body caused by a rear collision is provided on a front wall part and / or a rear wall part defining the recess. Is achieved.

  That is, according to the present invention, in the case of a rear collision, the battery is positively destroyed by the destruction member. Therefore, by destroying the battery, the battery no longer exists as a rigid body. It is possible to suppress a reduction in the crash stroke at the rear of the vehicle body at the time of a rear collision due to the presence of the mounted battery.

  In a preferred embodiment of the present invention, the breaking member protrudes from the front wall portion and / or the rear wall portion that defines the recess toward the battery, thereby bringing the breaking member closer to the battery. In the event of a rear collision of the vehicle, the battery can be destroyed at an early point.

  In a preferred embodiment of the present invention, the concave portion is provided at a side portion of the rear end portion of the vehicle body and extends between the rear surface portion of the rear wheel house and the rear wall of the vehicle body. Therefore, not only can the rear surface portion of the rear wheel house be used as a mounting member for the destruction member, but the battery can be destroyed while being sandwiched between a collision object from the rear and the tire or suspension. The battery can be prevented from moving toward the passenger compartment.

  A battery generally has a rectangular parallelepiped case body, and a plurality of partition plates are disposed in the case body at intervals in the longitudinal direction, and a plurality of liquid chambers are formed by the plurality of partition walls. Since the battery is partitioned, the destruction member can enter the battery along the partition wall of the battery by mounting the battery in the recess in a state of being placed horizontally in the longitudinal direction of the battery. Thus, the certainty of the destruction of the battery can be increased.

  The destruction member may be arranged in a state of being separated from the front or rear surface of the battery. However, by placing the tip of the destruction member in contact with or close to the front or rear surface of the battery, the battery can be attached or removed. In this case, the breaking member can be used as a guide member for the battery.

  In a preferred embodiment of the present invention, the breaking member has a tapered shape, and the ridge line at the tapered tip of the breaking member extends in the vertical direction. By setting the breaking member in such a shape and arrangement, the battery can be broken left and right in a vertically divided state. Compared to breaking the battery into two vertically divided parts, a part of the battery is Jumping upward from the recess can be prevented.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

First Example (FIGS. 1 to 3) :
1 is a trunk room, and the trunk room 1 can be opened and closed by a trunk lid (not shown) as is well known. The rear part of the trunk room 1 is formed of left and right rear side panels 2, a vehicle body rear wall 3, and a floor panel 4.

  As shown in FIGS. 1 to 3, a recessed portion 8 opened upward is formed at the rear end of the floor panel 4. The recess 8 is located on the outer side in the vehicle width direction than the rear side frame 7 and extends rearward from the rear wheel house 5 to the vehicle body. The concave portion 8 is defined by a front wall portion 9, a rear wall portion 10, an inner side wall portion 11, a bottom wall portion 12, and an outer side wall portion 13. In this embodiment, the front wall portion 9 is constituted by the rear surface portion 5 a of the rear wheel house 5, and the rear wall portion 10 is constituted by the vehicle body rear wall 3. That is, the concave portion 8 extends in the front-rear direction from the rear wheel house 5 to the vehicle body rear wall 3.

  The recess 8 is used as a space for accommodating the battery 23 and a tool (not shown). As is known, the battery 23 has a structure in which a rectangular parallelepiped battery case body 24 is sealed with a lid 25, and both the battery case body 24 and the lid 25 are made of a resin such as polypropylene or ABS.

  The battery 23 is housed in the recess 8 in a vertically placed state with its longitudinal direction directed in the longitudinal direction of the vehicle body, and the depth dimension of the recess 8 is designed to be substantially equal to the height dimension of the battery 23. Yes. A pair of caps 14, 14 spaced apart in the front-rear direction are provided on the upper surface of the battery 23, and the battery 23 is fixed to the recess 8 by a fixing bar 15 that crosses between the pair of caps 14, 14. The That is, the fixing bar 15 extends in the vehicle width direction so as to cross the battery 23, and the battery 23 is fixed by engaging the outer end portion of the fixing bar 15 in the vehicle width direction with the locking portion 16. Thus, displacement of the battery 23 in the longitudinal direction of the vehicle body and in the upward direction is restricted.

  A rear side breaking member 27 and a front side breaking member 28 are provided on the rear wall portion 10 and the front wall portion 9 of the recess 8, respectively. The rear side breaking member 27 and the front side breaking member 28 are both protruded toward the battery 23, and the shapes thereof are tapered toward the rear end surface and the front end surface of the battery 23. More specifically, the rear side breaking member 27 and the front side breaking member 28 both have a substantially triangular horizontal cross-sectional shape formed by bending a plate member, and the ridge line at the tip extends in the vertical direction. In relation to the mounting position of the battery 23, the front end of the front side breaking member 28 is in contact with or close to the front end surface of the battery 23, while the rear side breaking member 27 is separated from the rear end surface of the battery 23. Is located. Further, the rear side breaking member 27 and the front side breaking member 28 are preferably arranged so that their tips are located in the center of the battery 23 in the width direction, and the height levels thereof are preferably substantially the same. That is, the rear side breaking member 27 and the front side breaking member 28 are preferably arranged at the same height level and arranged on a common vehicle body longitudinal axis.

  According to the battery arrangement structure described above, when the rear part of the vehicle body is deformed by being collided from the rear side of the vehicle, the taper tip of the rear side breaking member 27 collides with the rear end surface of the battery 23 due to this deformation and destroys it. While pushing the battery 23 forward, the front side breaking member 28 bites into the front end face of the battery 23 and the front end face of the battery 23 is broken.

  As described above, when the rear part of the vehicle body is deformed due to a collision from the rear side, the battery 23 is destroyed. Therefore, the battery 23 is not present as a rigid body. Therefore, the crash stroke caused by the presence of the battery 23 disposed at the rear end part of the vehicle body is eliminated. Reduction can be suppressed.

  When the front side breaking member 28 and the rear side breaking member 27 are arranged at substantially the same level as in the first embodiment, an impact load is input from the rear side breaking member 27 and the front side breaking member 28 to the battery 23. At this time, it is possible to prevent the battery 23 from rotating about a substantially horizontal virtual rotation axis, and to use the impact load without loss to perform the destruction activity of the battery 23 by the rear side destruction member 27 and the front side destruction member 28. Can be executed.

  Similarly, by arranging the rear side breaking member 27 and the front side breaking member 28 on a common vehicle body longitudinal axis, when an impact load is input from the rear side breaking member 27 and the front side breaking member 28 to the battery 23, It is possible to prevent the battery 23 from rotating about a substantially vertical virtual rotation axis, and to perform the destruction activity of the battery 23 by the rear side destruction member 27 and the front side destruction member 28 using an impact load without loss. be able to.

  Moreover, since both the rear side destruction member 27 and the front side destruction member 28 have the tapering shape provided with the ridgeline extended in an up-down direction, the battery 23 can be destroyed in a vertically divided state, and the destroyed battery The possibility that 23 protrudes from the recess 8 can be reduced. In other words, when the rear side breaking member 27 and the front side breaking member 28 have a tapered shape with a ridge line extending in the horizontal direction, the battery 23 is broken in a state where the battery 23 is divided into two vertically. There is a possibility that the upper half battery may jump out of the recess 8.

  Further, as in the first embodiment, since the tapered tip of the front side breaking member 28 is located close to or in contact with the front end surface of the battery 23, when the battery 23 is mounted in the recess 8, the front side breaking member The battery 23 can be temporarily positioned by placing the battery 23 in the recess 8 along the line 28, and the labor for fixing the battery 23 with the fixing bar 15 can be reduced.

  In the first embodiment, the example in which the front side breaking member 28 and the rear side breaking member 27 are arranged with the battery 23 interposed therebetween has been described. However, either the front side breaking member 28 or the rear side breaking member 27 is omitted. Needless to say. Furthermore, although the first embodiment has been described by taking the trunk room 1 as an example, it is needless to say that the invention can also be applied to a vehicle such as a one-box car.

Second Example (FIGS. 4 to 6) :
4 to 6 show a second embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the second embodiment, a recess 8 is formed in an intermediate portion of the floor area sandwiched between a pair of left and right rear side frames 7, 7. That is, the recess 8 occupies a relatively wide area in the front-rear direction between the pair of rear side frames 7, the front wall portion 9 of the recess 8 has an arc shape in plan view, and the rear wall portion 9 The rear end cross member 31 is formed of a rear end cross member 31 and has a closed cross-sectional structure in which an outer panel 32 and an inner panel 33 are joined. Depending on the vehicle, the rear wall portion 9 of the recess 8 may be formed of a rear end panel.

  In the lower region of the floor panel 4, a strength component 40 is disposed adjacent to the front end of the recess 8, a fuel tank 41 is disposed, and the floor panel 4 is reinforced by a cross member 42.

  A battery 23 is fixed to the bottom wall 12 via a base plate 43 at the rear end of the recess 8. Setting of the mounting position of the battery 23 is arbitrary, and the battery 23 may be mounted on the front end of the recess 8 as indicated by a virtual line. The base plate 43 is fixed to the bottom wall portion 12 using a plurality of stud bolts 44, and the battery 23 is detachably fixed to the base plate 43 using two bands 45.

  Even in the second embodiment, the rear side breaking member 27 and the front side breaking member 28 are installed so as to sandwich the battery 23 in the front-rear direction. 4 to 6, reference numeral 46 denotes a board. The board 46 substantially forms a floor in the cargo space at the rear of the vehicle or a floor on which a spare tire is mounted.

  The rear side breaking member 27 and the front side breaking member 28 both have a substantially triangular shape with a tapered horizontal cross section formed by bending a plate member, and the ridgeline at the tip thereof is vertically similar to the first embodiment. It is installed to extend in the direction.

  In the battery mounting position indicated by a solid line in FIG. 5 and the like, the battery 23 is in a state of being in proximity to or in contact with the front end of the rear side breaking member 27 disposed so as to protrude forward from the rear end cross member 31. On the other hand, the front side breaking member 28 is disposed in front of the battery 23 and spaced from the battery 23.

  In this second embodiment, the battery 23 is mounted in the recess 8 in a state of being placed horizontally with its longitudinal direction directed in the vehicle width direction. As shown in FIG. 7, the battery 23 has a plurality of partition plates 34 arranged at intervals in the longitudinal direction inside a resin battery case 24, and a plurality of liquids formed by the partition plates 34. The chamber 35 has a structure in which a plurality of positive and negative electrode plates 36 are accommodated. Therefore, when the battery 23 is mounted horizontally, the partition wall 34 and the electrode plate 36 of the battery 23 are positioned along the longitudinal direction of the vehicle body.

  The front and rear breaking members 27 and 28 located across the battery 23 should be located on a common axis where the virtual axis connecting the tips extends in the longitudinal direction of the vehicle body and intersects the middle portion in the longitudinal direction of the battery 23. The front and rear breaking members 27 and 28 are preferably arranged at the same height level as in the first embodiment.

  Even in the second embodiment, a crash stroke associated with the presence of the battery 23 is obtained by destroying the battery 23 in a state where the battery 23 is divided into left and right by the front and rear destruction members 27 and 28 due to a collision from the rear. It is possible to suppress the decrease of the above, and there are substantially the same effects as the first embodiment. In the second embodiment, since the battery 23 is mounted horizontally, the front and rear destruction members 27 and 28 are in front of and behind the vehicle 23 so as to coincide with the extending direction of the partition wall 34 and the electrode plate 36 of the battery 23. Since it penetrates in the direction, the battery 23 can be destroyed relatively easily. Of course, even in the second embodiment, the battery 23 may be mounted in the recess 8 in a vertical state.

  In the second embodiment, either the front side breaking member 28 or the rear side breaking member 27 may be omitted.

It is a fragmentary perspective view which shows the battery arrangement structure of 1st Example, and shows the example which mounted the battery in the side part of the vehicle body rear end part. It is a top view of FIG. It is sectional drawing along the III-III line of FIG. It is a fragmentary perspective view which shows the battery arrangement | positioning structure of 2nd Example, and formed the recessed part in the floor panel between right-and-left rear side frames, and shows the example which mounted the battery in this recessed part. It is sectional drawing along the VV line of FIG. FIG. 5 is a plan view of FIG. 4. It is a figure for demonstrating the structure of a battery.

Explanation of symbols

4 Floor panel 5 Rear wheel house 5a Rear surface portion of rear wheel house 7 Rear side frame 8 Recessed portion 9 Front wall portion of recessed portion 10 Rear wall portion of recessed portion 23 Battery 24 Battery case body 27 Rear side breaking member 28 Front side breaking member 34 Battery partition Wall 35 Battery compartment

Claims (7)

In a battery arrangement structure in which a battery provided with a resin case body is mounted in a recess formed in a floor panel at the rear end of an automobile body,
A battery disposition structure, wherein a breaking member for breaking the battery by deformation of a rear part of a vehicle body due to a rear collision is provided on a front wall part and / or a rear wall part that defines the recess.   The battery disposition structure according to claim 1, wherein the breaking member is protruded toward the battery from a front wall portion and / or a rear wall portion that defines the recess.   3. The battery arrangement structure according to claim 1, wherein the recess is provided on a side portion of a rear end portion of the vehicle body and extends between a rear surface portion of the rear wheel house and a rear wall of the vehicle body.   3. The battery arrangement structure according to claim 1, wherein the recess is formed in a floor panel between a pair of left and right rear side frames, and a rear end wall of the recess is configured by a rear end cross member or a rear end panel. In the battery, the case body has a rectangular parallelepiped shape, and a plurality of partition plates are disposed in the case body at intervals in the longitudinal direction, and a plurality of liquid chambers are partitioned by the plurality of partition walls. And
The battery disposition structure according to claim 4, wherein the battery is mounted in the concave portion in a horizontally placed state with a longitudinal direction directed in a vehicle width direction.   The battery disposition structure according to any one of claims 2 to 5, wherein a leading end of the breaking member is located in contact with or close to a front end or a rear end of the battery mounted in the recess.   The battery disposition structure according to any one of claims 1 to 6, wherein the breaking member has a tapered shape, and a ridge line at a tapered tip end of the breaking member extends in a vertical direction.

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