JP2007015600A - Mounting structure of battery pack on vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of battery pack on vehicle, minimizing upsizing of a rear part of a vehicle, while reducing impact added from the rearward of the vehicle to a battery pack. <P>SOLUTION: In this mounting structure of battery pack on vehicle, the battery pack 1 is mounted on a floor panel rearward of rear seats 2 in the vehicle. Coupling of a car body side part to the battery pack is released by an impact load from the rearward of the vehicle, and the battery pack 1 is led to a range below the installation position of the floor panel 3 rearward of the rear seats 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an assembled battery mounted structure.

  2. Description of the Related Art Conventionally, vehicles equipped with assembled batteries formed by connecting a plurality of batteries are known for use as a driving power source for hybrid vehicles and an auxiliary power source for fuel cell vehicles.

In recent years, the size of the assembled battery has been reduced, and in this type of vehicle, the assembled battery is generally mounted in a luggage room behind the rear seat.
JP 2001-283803 A

  In a vehicle with the assembled battery mounted in the luggage room behind the rear seat in this manner, the assembled battery of the vehicle body is protected against impact loads from the rear of the vehicle in order to protect the assembled battery at the time of a rear-end collision or a collision during reverse. By deforming a region located rearward, the impact is absorbed and damage to the assembled battery is suppressed.

  To that end, it is necessary to secure a certain distance between the rear end of the assembled battery and the rear end of the vehicle body. However, such a configuration is particularly unsuitable for small cars, and the installation location may be forced to change. .

  Therefore, an object of the present invention is to provide an assembled battery on-vehicle structure that can enhance the protection of the assembled battery while suppressing the enlargement of the rear portion of the vehicle as much as possible against an impact load from the rear of the vehicle.

  In the present invention, in the assembled battery in-vehicle structure in which the assembled battery is mounted on the floor panel behind the rear seat of the vehicle, the assembled battery is installed on the floor panel behind the rear seat by an impact load from the rear of the vehicle. The most important feature is that it is introduced into a region below the position.

  According to the present invention, the assembled battery is introduced into the region below the floor panel installation position on the rear side of the rear seat due to the impact load from the rear of the vehicle. The assembled battery can be protected against an impact load from the rear.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  (First Embodiment) FIG. 1 is a perspective view showing an assembled battery mounted structure according to this embodiment, FIG. 2 is a side view showing the assembled battery mounted structure, and (a) shows a normal state. FIGS. 3A and 3B are views showing a state in which an impact load from the rear of the vehicle is applied, FIG. 3 is a perspective view showing the assembled battery and a bracket provided on the vehicle body side, and FIG. The figure shown, (b) is a figure which shows the state which the impact load from the vehicle rear acted. In each figure, FR indicates the front in the vehicle front-rear direction.

  An assembled battery 1 configured by connecting a plurality of batteries as a driving power source for a hybrid vehicle or an auxiliary power source for a fuel cell vehicle is formed in a flat rectangular parallelepiped shape and is mounted on a rectangular mounting panel 6 in plan view. It is fixed to. The mounting panel 6 has relatively high rigidity and strength (particularly buckling rigidity in the longitudinal direction of the vehicle), and protects the assembled battery 1 against a load acting from the outside. Moreover, it has the function to transmit the load from back to the front.

  In the present embodiment, the assembled battery 1 is mounted on the floor panel 3 behind the rear seat 2 of the vehicle. Specifically, on the side members 4, 4 extending in the front-rear direction on both sides of the rear part of the vehicle, the floor panel 3 and the mountain-shaped base brackets 8, 8 in a side view are provided. By fixing the bracket arms 7 and 7 fixed to the mounting panel 6 respectively, the rear part of the assembled battery 1 is fixed to the vehicle body side. Each base bracket 8 is fixed to the side member 4 using, for example, a bolt (not shown) penetrating the flat portion 3b of the floor panel 3. The flat portion 3b is preferably formed with a long hole in the vehicle front-rear direction through which the bolt is inserted.

  A band-like bracket arm 7 extending rearward from the rear edge of the mounting panel 6 is bent into a mountain shape when viewed from the side, and is superimposed on the base bracket 8 so that the mountain shapes overlap each other. The rear inclined portion 7a is provided with a notch 7b opened to the rear edge side, and the bolt 9 inserted through the notch 7b is fixed on the rear inclined portion 8a of the base bracket 8. That is, the base bracket 8 and the bracket arm 7 are fastened and fixed together by the bolt 9. However, as will be described later, the tightening torque of the bolt 9 is appropriately set so that the bracket arm 7 comes out when a relatively large load (impact load) is input from the rear.

  On the other hand, the front portion of the battery pack 1 (the front portion of the mounting panel 6) is fixed to the floor panel 3 with bolts or the like.

  The assembled battery 1 overlaps the cross member 5 in the front-rear direction above or below the cross member 5 extending between the side members 4 and 4 extending in the vehicle width direction (up in the present embodiment). It is preferable that the cross member 5 protects against a side impact applied at the time of a vehicle side collision or the like.

  On the other hand, on the front side of the flat portion 3 b of the floor panel 3, a front-falling inclined portion 3 a is continuously provided. In this inclined portion 3a, a flat portion of the floor panel 3 is formed by forming a plurality of fragile portions such as a strip-like thin portion extending in the vehicle width direction or a groove portion (not shown) at predetermined intervals. The buckling rigidity and bending rigidity in the front-rear direction are weakened relative to 3b and the mounting panel 6, and the inclined portion 3a is buckled or bent for a relatively large load from the rear. .

  In the assembled battery mounted structure having the above configuration, in the normal state, the assembled battery 1 is disposed on the floor panel 3 behind the rear seat 2 as shown in FIG.

  On the other hand, when a relatively large load (impact load) directed forward is input to the rear portion of the vehicle at the time of a vehicle rear surface collision or the like, the load is applied via the flat portion 3b of the floor panel 3 or the mounting panel 6 It acts on the forward inclined portion 3a.

  Here, as described above, since the fragile portion is formed in the inclined portion 3a, the inclined portion 3a is bent and deformed, for example, in a bellows shape by the load acting on the rear end portion thereof in the front-rear direction. Reduce to.

  Further, since the tightening torque of the bolt 9 is appropriately set, the mounting panel 6 (and the assembled battery 1) is pulled forward from the floor panel 3 by the load, and the bracket arm 7 fixed to the mounting panel 6 is The mounting panel 6 and the assembled battery 1 are moved forward together with the floor panel 3 by being released from the base bracket 8.

  That is, when a relatively large load toward the front is input to the rear part of the vehicle, as shown in FIG. 2 (b), the inclined part 3a is shortened. Moves forward and downward from the original installation position.

  At this time, the assembled battery 1 falls downward due to its own weight, and a part of the front side of the assembled battery 1 is below the floor panel installation position behind the rear seat 2 (in FIG. 2B). To the area indicated by the hatching on the right.

  However, at this time, the floor panel 3 is not completely separated from the vehicle body, and at least the front portion and the rear portion thereof are appropriately connected to the vehicle body side, and the assembled battery 1 is separated from the vehicle body. Prevents falling to the ground. In such a configuration, the floor panel 3 generates an elastic force when the assembled battery 1 moves forward and downward, and functions as a buffer body of the assembled battery 1. In addition, about the side edge part (edge edge part of a vehicle width direction) of the floor panel 3, joining strength with the vehicle body side (side members 4 and 4) is suitably used so that the said floor panel 3 can move ahead more smoothly. It is preferable to make it weaker or to provide a fragile portion so that the load is separated from the vehicle body side.

  Further, as described above, the inclined portion 8a of the base bracket 8 and the inclined portion 7a of the bracket arm 7 are overlapped, so that this portion changes the posture of the assembled battery 1 to the inclined portion 3a that is lowered forward and the rear inclined portion. The rear seat 2 is changed to a front-down posture along the seat back (that is, the assembled battery 1 is rotated counterclockwise in FIG. 2), and the inclined portion 3a is deformed, and the assembled battery 1 is moved forward. In addition, the downward movement can be performed more smoothly and reliably, and the assembled battery 1 can be prevented from colliding with the rear seat 2.

  That is, according to the present embodiment, when a large load directed forward is applied to the rear portion of the vehicle, the assembled battery 1 does not collide with the rear seat 2 or the like, and within a relatively wide space on the rear side of the rear seat 2. Thus, since a relatively long distance can be moved in an oblique direction forward and downward, damage to the assembled battery 1 can be minimized.

  Further, as shown in FIG. 2B, a part of the front side of the assembled battery 1 is set by appropriately setting specifications such as the thickness of the floor panel 3 with respect to the weight of the assembled battery 1 (and the mounting panel 6) Is advanced to a region below the lower end of the rear seat 2 (a region indicated by shading in FIG. 2B). If it carries out like this, the protection property of the assembled battery 1 can be improved further.

  In addition, according to the present embodiment, the inclined portions 7a, 8a as the guide portions for moving and guiding the assembled battery 1 in a predetermined direction to the bracket arm 7 and the base bracket 8 as a bracket for attaching the assembled battery 1 to the vehicle body side. Since the notch 7b is provided, the posture of the assembled battery 1 can be changed more easily.

  Further, according to the present embodiment, since the assembled battery 1 is prevented from falling off the vehicle body while maintaining a state in which at least a part (the front part and the rear part) of the floor panel 3 is connected to the vehicle body side, the assembled battery 1 is It can protect more reliably.

  (Second Embodiment) FIGS. 4A and 4B are side views showing an assembled battery mounting structure according to this embodiment, in which FIG. 4A shows a normal state, and FIG. 4B shows an impact load from the rear of the vehicle. It is a figure which shows the state which acted. In addition, the assembled battery vehicle-mounted structure concerning this embodiment is equipped with the structure similar to the said embodiment. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted.

  In this embodiment, the assembled battery 1 and the mounting panel 6 are arranged on a cross member 5A as a vehicle body skeleton member extending in the vehicle width direction, and the cross member 5A is attached to another vehicle body by an impact load from the rear of the vehicle. In addition to being separated from the side members 4 and 4 as the skeleton members, in addition to the assembled battery 1 and the mounting panel 6, the cross member 5A is also moved forward and downward integrally to be lower than the original installation position of the cross member 5A. In the region (the region indicated by the right-down hatching in FIG. 4).

  For this reason, the mounting panel 6 is fixed to the cross member 5A, and at the connection portion between the cross member 5A and the side members 4 and 4, the bonding strength is weakened or a fragile portion is provided so as to face forward. The cross member 5A is separated from the side members 4 and 4 by the applied load.

  Alternatively, although not shown, for example, the side end wall of the cross member 5A and the side walls of the side members 4 and 4 are brought into contact with each other, and one of these walls is provided with a notch that opens at least rearwardly. You may make it fasten the said side end wall and a side wall with this volt | bolt etc., inserting a volt | bolt etc. in a notch. In this way, the notch serves as a guide for moving and guiding the cross member 5A. In this case, it is preferable to set the extending direction of the notch (for example, the forward descending direction) according to the posture of the assembled battery 1 when it moves.

  Also according to this embodiment, substantially the same effect as the first embodiment can be obtained. Furthermore, according to the present embodiment, since the mass of the moving part increases as the cross member 5A is moved, there is an advantage that the assembled battery 1 can be moved further easily. is there.

  (Third Embodiment) FIGS. 5A and 5B are side views showing an assembled battery mounted structure according to this embodiment, in which FIG. 5A is a diagram showing a normal state, and FIG. 5B is a diagram showing an impact load from the rear of the vehicle. It is a figure which shows the state which acted. In addition, the assembled battery vehicle-mounted structure concerning this embodiment is equipped with the structure similar to the said embodiment. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted.

  In the above embodiment, the assembled battery 1 is moved forward and downward in a posture that is forwardly lowered, whereas in this embodiment, the assembled battery 1 is forwardly and downwardly in a posture that is forwardly raised (backwardly lowered). To be moved. For this reason, the floor panel 3B includes a front rising slope part 3c on which the assembled battery 1 (and the mounting panel 6) is placed in a slightly forward posture, and a front forward slope (backward rise) slope part 3d. In addition, a bracket arm 7B that is fixed to the mounting panel 6 and tilts rearward is superimposed on the front inclined portion of the mountain-shaped base bracket 8B in a side view. The movement is guided forward and downward. Further, with this configuration, the assembled battery 1 has a steep forward (rearward) inclination (that is, the assembled battery 1 rotates in the clockwise direction in FIG. 5).

  Also in the present embodiment, as in the second embodiment, the cross member 5B is separated from the side members 4 and 4, and the cross member 5B is moved downward together with the assembled battery 1 and the mounting panel 6.

  Also according to this embodiment, the same effects as those of the first and second embodiments can be obtained.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the above-described embodiment, an example in which the assembled battery is attached to the vehicle body via the attachment panel is disclosed, but the attachment panel is omitted by appropriately increasing the rigidity and strength of the bottom wall portion of the assembled battery. You may do it.

  In addition, the bracket and other shapes can be variously modified. For example, a plate-like bracket connected to the assembled battery is brought into contact with the inner side wall surface of the side member, and the side wall and the bracket are coupled. You may make it do.

  Moreover, you may provide the guide part which carries out movement guidance of an assembled battery in the part which vehicle bodies and assembled batteries other than a bracket contact.

The perspective view which shows the assembled battery vehicle-mounted structure concerning 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the assembled battery vehicle-mounted structure concerning 1st Embodiment of this invention, Comprising: (a) is a figure which shows a normal state, (b) is the state which the assembled battery moved by the impact load from the vehicle rear FIG. It is a perspective view which shows the assembled battery and the bracket provided in the vehicle body side in the assembled battery vehicle-mounted structure concerning 1st Embodiment of this invention, Comprising: (a) is a figure which shows a normal state, (b) is vehicle rear The figure which shows the state which the assembled battery moved by the impact load from. It is a side view which shows the assembled battery vehicle-mounted structure concerning 2nd Embodiment of this invention, Comprising: (a) is a figure which shows a normal state, (b) is the state which the assembled battery moved by the impact load from the vehicle rear FIG. It is a side view which shows the assembled battery vehicle-mounted structure concerning 3rd Embodiment of this invention, Comprising: (a) is a figure which shows a normal state, (b) is the state which the assembled battery moved by the impact load from the vehicle rear FIG.

Explanation of symbols

1 assembled battery 2 rear seat 3, 3B floor panel 4 side member (other body frame member)
5,5A, 5B Cross member (body frame member)

Claims (6)

In the assembled battery mounted structure in which the assembled battery is mounted on the floor panel behind the rear seat of the vehicle,
An assembled battery mounted structure, wherein the assembled battery is introduced into a region below a floor panel installation position on the rear side of the rear seat by an impact load from the rear of the vehicle.   The assembled battery on-vehicle structure according to claim 1, wherein the assembled battery is further introduced into a region below the lower end of the rear seat.   The assembled battery is coupled to a part on the vehicle body side, and the coupling with the part on the vehicle body side is released by an impact load from the rear of the vehicle, and from the floor panel installation position behind the rear seat. The assembled battery on-vehicle structure according to claim 1, wherein the assembled battery is mounted in a region that is located below.   The fragile portion is provided in the floor panel in front of the assembled battery, and the fragile portion is deformed by an impact load from the rear of the vehicle, whereby the assembled battery is moved forward and downward. The assembled battery mounting structure as described in any one of 1-3.   The assembled battery is arranged on a cross member as a vehicle body skeleton member extending in the vehicle width direction, and the cross member is separated from other vehicle body skeleton members by an impact load from the rear of the vehicle, and the assembled battery is The assembled battery on-vehicle structure according to any one of claims 1 to 4, wherein the structure is introduced into a region below the installation position of the cross member.   The assembled battery on-vehicle structure according to any one of claims 1 to 5, wherein a guide portion for moving and guiding the assembled battery in a predetermined direction is provided on the assembled battery or the vehicle body side.

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