Battery mounting structure

Abstract

To provide a battery mounting structure capable of improving impact absorption performance in a simple structure.SOLUTION: A battery mounting structure includes: a vehicle frame having a hollow structure extending along a longitudinal direction of a vehicle on both sides of the vehicle; a plurality of battery modules arranged inside the vehicle frame and arranged along the longitudinal direction and a width direction orthogonal to the longitudinal direction; a battery cross portion extending along the width direction in the vehicle frame; an impact absorption material disposed outside the vehicle frame in the width direction to absorb side collision energy; and a first member which is disposed between the battery cross portion and the vehicle frame to at least partially overlap both of the battery cross portion and the impact absorption material when projected in the width direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a battery mounting structure. [Background technology]

[0002] Patent Document 1 discloses a battery pack mounting structure in which a shock absorbing material is arranged below a frame member of a vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-046719 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration of Patent Document 1, the load applied to the impact absorbing material due to a side collision of the vehicle is supported by a battery cross placed inside the battery pack housing. In this case, if the extending position of the impact absorbing material and the extending position of the battery cross are misaligned in the width direction of the vehicle, the impact absorbing material will undergo rotational deformation, resulting in poor impact absorption efficiency.

[0005] Alternatively, impact absorbing materials may be placed on the outside of the vehicle's frame members, and the load applied to the impact absorbing materials in a side collision may be supported by the frame members. In this case, both the front and rear ends of the frame members are supported by vehicle cross members placed at the front and rear of the vehicle. This requires a long distance between support points, which requires ensuring the bending strength of the frame members, resulting in increased mass and cost.

[0006] The present disclosure has been made in view of the above, and has an object to provide a battery mounting structure that can improve impact absorption performance with a simple configuration. [Means for solving the problem]

[0007] The battery mounting structure of the present disclosure comprises a hollow vehicle frame extending along the fore-and-aft direction of the vehicle on both sides of the vehicle, a plurality of battery modules arranged between the vehicle frames and aligned along the fore-and-aft direction and a width direction perpendicular to the fore-and-aft direction, a battery cross extending along the width direction between the vehicle frames, an impact absorbing material arranged on the outside of the vehicle frame in the width direction to absorb the energy of a side collision, and a first member arranged between the battery cross and the vehicle frame and at least partially overlapping with the battery cross and the impact absorbing material when projected in the width direction. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to realize a battery mounting structure that can improve shock absorption performance with a simple configuration. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a vehicle including a battery mounting structure according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 3 is a perspective view of the battery module. [Figure 4] FIG. 4 is a perspective view of the battery frame. DETAILED DESCRIPTION OF THE INVENTION

[0010] A battery mounting structure according to an embodiment of the present disclosure will be described with reference to the drawings. Note that the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially identical.

[0011] (Embodiment) Fig. 1 is a diagram showing a schematic configuration of a vehicle including a battery mounting structure according to an embodiment. In Fig. 1, the front-rear direction of the vehicle 1 corresponds to the up-down direction on the paper, and the width direction of the vehicle 1 corresponds to the left-right direction on the paper. The vehicle 1 includes a vehicle frame 2, vehicle crosses 3 and 4, a plurality of battery modules 5, a battery frame 6, a battery cross 7, a first member 8, and a second member 9.

[0012] Fig. 2 is a cross-sectional view corresponding to the line AA in Fig. 1. The vehicle 1 is provided with an energy absorption (EA) material 10.

[0013] The vehicle frame 2 extends along the front-rear direction of the vehicle 1 on both sides of the vehicle 1. The vehicle frame 2 is a hollow member formed by processing a plate-like member made of metal or alloy into a pillar shape.

[0014] The vehicle cross 3 extends in the width direction of the vehicle 1 at the front of the vehicle 1 .

[0015] The vehicle cross 4 extends along the width direction of the vehicle 1 at the rear of the vehicle 1.

[0016] The battery modules 5 are disposed between the vehicle frames 2 and are arranged in the front-rear and width directions. Fig. 3 is a perspective view of a battery module. In the example of Fig. 3, the battery modules 5 are arranged in three rows in the front-rear and width directions.

[0017] The battery frame 6 houses the battery module 5 .

[0018] The battery crosses 7 are arranged in the front-rear and width directions between the vehicle frames 2. Fig. 4 is a perspective view of the battery frame. In the example of Fig. 4, two battery crosses 7 extending in the front-rear direction and four battery crosses 7 extending in the width direction are shown.

[0019] Returning to Fig. 2, the first member 8 is disposed between the battery cloth 7 and the vehicle frame 2, and at least partially overlaps with the battery cloth 7 and the EA material 10 when projected in the width direction. The first member 8 has a convex portion that protrudes outward from the vehicle 1 in the width direction and a flange portion that extends vertically from the convex portion, and the flange portion is fixed to the battery frame 6 by welding or the like. Furthermore, as shown by dashed line L in Fig. 2, it is preferable that the ridge line along the upper end of the first member 8 in the width direction coincides with the ridge line along the upper end of the battery cloth 7 and the EA material 10.

[0020] The second member 9 is disposed inside the vehicle frame 2, and when projected in the width direction, at least a portion of it overlaps with the battery cloth 7 and the EA material 10. The second member 9 has a convex portion that protrudes outward from the vehicle 1 in the width direction and a flange portion that extends vertically from the convex portion, and the flange portion is fixed to the inner wall surface of the vehicle frame 2 by welding or the like. Furthermore, as shown by dashed line L in Figure 2, it is preferable that the ridge line along the upper end of the second member 9 in the width direction coincides with the ridge line along the upper end of the battery cloth 7 and the EA material 10.

[0021] The first member 8 and the second member 9 are positioned so that the convex portions overlap when projected in the width direction.

[0022] The EA material 10 is disposed on the outer side of the vehicle frame 2 in the width direction, and absorbs the energy of a side collision.

[0023] According to the embodiment described above, when projected in the width direction, the battery cloth 7 and the EA material 10 at least partially overlap with the first member 8. As a result, the load applied to the EA material 10 due to a side collision of the vehicle is supported by the battery cloth 7 via the first member 8, thereby improving the impact absorption efficiency.

[0024] Similarly, according to the embodiment, when projected in the width direction, the battery cloth 7 and the EA material 10 at least partially overlap with the second member 9. As a result, the load applied to the EA material 10 due to a side collision of the vehicle is supported by the battery cloth 7 via the second member 9, thereby improving the impact absorption efficiency.

[0025] Furthermore, since the battery cross 7 supports the load applied to the EA material 10 due to a side collision of the vehicle, there is no need to increase the bending strength of the vehicle frame 2 in preparation for a side collision, and a simple configuration can be achieved.

[0026] Furthermore, according to the embodiment, the first member 8 and the second member 9 are positioned so that their convex portions overlap when projected in the width direction. As a result, the load applied to the EA material 10 due to a side collision of the vehicle is supported by the battery cloth 7 via the first member 8 and the second member 9, thereby improving the impact absorption efficiency.

[0027] Furthermore, according to the embodiment, the ridge lines along the upper ends of the first member 8 and the second member 9 coincide with the ridge lines along the upper ends of the battery cloth 7 and the EA material 10. As a result, there is little deviation in the width direction of the vehicle 1 between the position where the EA material 10 extends and the position where the battery cloth 7 extends, thereby improving the impact absorption efficiency.

[0028] Further advantages and modifications will readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. [Explanation of symbols]

[0029] 1 vehicle 2 Vehicle frame 3, 4 vehicle crossing 5 Battery Module 6 Battery Frame 7 Battery Cloth 8 First member 9 Second member 10 EA material

Claims

1. a hollow vehicle frame extending along the front-rear direction of the vehicle on both sides of the vehicle; a plurality of battery modules disposed between the vehicle frames and arranged along the front-rear direction and a width direction perpendicular to the front-rear direction; a battery cross extending along the width direction between the vehicle frames; an impact absorbing material disposed on an outer side of the vehicle frame in the width direction and configured to absorb energy of a side collision; a first member disposed between the battery cross and the vehicle frame and at least partially overlapping with the battery cross and the impact absorbing material when projected in the width direction; A battery mounting structure comprising:

2. The battery mounting structure according to claim 1 , further comprising a second member disposed inside the vehicle frame and at least partially overlapping the battery cloth and the impact absorbing material when projected in the width direction.

3. The battery mounting structure according to claim 2 , wherein the first member and the second member have convex portions that protrude toward the outside of the vehicle in the width direction, and the convex portions are positioned so as to overlap when projected in the width direction.

4. The battery mounting structure according to claim 2 , wherein in the width direction, ridge lines along the upper ends of the first member and the second member coincide with ridge lines along the upper ends of the battery cross and the impact absorbing material.

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