vehicle

Abstract

To provide a technology which enables reduction of a buffer load transmitted from an EA material to a side wall of a battery pack.SOLUTION: A vehicle includes: a vehicle body having a floor panel; a battery pack located below the floor panel; and an energy absorption material located at the outer side as seen in a vehicle width direction of the battery pack and fixes the battery pack to the vehicle body. The energy absorption material is a hollow member having a uniform cross section along a vehicle length direction. An inner side wall, which faces the battery pack, of the energy absorption material inclines to the lower side as seen in a vehicle height direction toward the inner side as seen in the vehicle width direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a vehicle. [Background technology]

[0002] Patent Document 1 describes a vehicle that includes a pair of rockers, a floor panel extending between the pair of rockers, a battery pack located below the floor panel, and an energy absorbing material that is disposed on the outer side of the battery pack in the vehicle width direction and fixed to one of the pair of rockers. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-226353 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described structure, when a side collision occurs to the vehicle, the energy absorbing material (hereinafter sometimes referred to as EA material) deforms to absorb the collision energy. At this time, if the inner side wall of the EA material facing the battery pack is pressed against the side wall of the battery pack, a relatively large collision load may act on the side wall of the battery pack.

[0005] In view of the above circumstances, this specification provides a technique that can reduce the collision load transmitted from the EA material to the side wall of the battery pack. [Means for solving the problem]

[0006] The technology disclosed in this specification is embodied in a vehicle. The vehicle includes a vehicle body having a floor panel, a battery pack located below the floor panel, and an energy absorbing material located outward of the battery pack in the vehicle width direction and fixing the battery pack to the vehicle body. The energy absorbing material is a hollow member having a constant cross section along the vehicle length direction. An inner side wall of the energy absorbing material facing the battery pack is inclined downward in the vehicle height direction as it extends inward in the vehicle width direction.

[0007] In the above-described structure, when a side collision occurs to the vehicle, the EA material deforms, absorbing the collision energy. Here, the inner side wall of the EA material facing the battery pack is inclined downward in the vehicle height direction as it moves inward in the vehicle width direction. Therefore, even if the EA material is compressed and deformed in the vehicle width direction toward the battery pack, contact between the EA material and the side wall of the battery pack can be avoided or suppressed. This reduces the collision load acting from the EA material on the side wall of the battery pack. [Brief explanation of the drawings]

[0008] [Figure 1] 1 shows a schematic configuration of a vehicle 10 according to a first embodiment. [Figure 2] 3 is a diagram for explaining the positional relationship between the battery pack 20, the pair of EA members 30, 32, and the pair of rockers 24, 26. FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 4(A) to 4(C) are diagrams showing an example of deformation of the EA material 30 over time when a side collision occurs to the vehicle 10. FIG. [Figure 5] FIG. 4 is an enlarged view of the boxed area V in FIG. 3. [Figure 6] 3 is a cross-sectional view showing the structure of Example 2 taken along the line III-III in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0009] In one embodiment of the present technology, the vehicle may further include a collar arranged along the vehicle height direction, with an upper end abutting the battery pack and a lower end abutting the energy absorbing material, and a bolt passing through the collar and fastening the energy absorbing material to the battery pack. With this configuration, the distance between the EA material fastened by the bolt and the battery pack is determined by the dimension of the collar in the vehicle height direction. Therefore, it is possible to avoid or suppress variation in the distance caused by the fastening operation.

[0010] In the above-described embodiment, an opening through which the collar passes may be formed in the inner sidewall of the energy absorbing material, allowing the collar to be positioned relative to the energy absorbing material regardless of the angle at which the sidewall is inclined.

[0011] In some of the above-described embodiments, the collar may be welded to the inner sidewall of the energy absorbing material. This configuration allows the collar to be firmly fixed to the EA material. Therefore, even if the EA material is compressed and deformed in the vehicle width direction toward the battery pack, it is possible to avoid or suppress contact between both the EA material and the collar and the sidewall of the battery pack.

[0012] In some of the above-described embodiments, the inner diameter of the collar may be at least twice the nominal diameter of the bolt. This configuration ensures a relatively large gap between the collar and the bolt. Therefore, when the EA material is compressed and deformed in the vehicle width direction toward the battery pack, the gap between the collar and the bolt reduces the collision load acting from the EA material on the side wall of the battery pack.

[0013] In some of the above-described embodiments, the battery pack may be provided with a bracket that protrudes outward in the vehicle width direction. In this case, the bolt may fasten the energy absorbing material to the bracket of the battery pack. With this configuration, the distance between the battery pack and the EA material in the vehicle width direction can be increased by the amount that the bracket protrudes outward in the vehicle width direction. Therefore, when the EA material is compressively deformed in the vehicle width direction toward the battery pack, the collision load acting from the EA material to the side wall of the battery pack can be reduced. However, in another embodiment, the EA material may be directly fastened to the battery pack by the bolt without providing a bracket on the battery pack.

[0014] In one embodiment of the present technology, the energy absorbing material may have, in the vehicle width direction, an inner end portion including an inner side wall and an intermediate portion adjacent to the inner end portion. In this case, the thickness of the inner side wall of the energy absorbing material may be greater than the thickness of each wall constituting the intermediate portion of the energy absorbing material. With this configuration, the rigidity of the inner side wall of the EA material facing the battery pack can be made higher than the rigidity of each wall constituting the intermediate portion of the EA material. As a result, when the EA material is compressed and deformed in the vehicle width direction toward the battery pack, the inner side wall of the EA material can be made less likely to deform than each wall constituting the intermediate portion of the EA material. Therefore, contact of the EA material with the side wall of the battery pack can be avoided or suppressed.

[0015] In the above-described embodiment, the thickness of each wall constituting the inner end portion of the energy absorbing material may be greater than the thickness of each wall constituting the middle portion of the energy absorbing material. With this configuration, the rigidity of each wall in the inner end portion, including the inner side wall facing the battery pack, can be made greater than the rigidity of each wall constituting the middle portion. This makes it possible to make the inner end portion of the EA material less susceptible to deformation than the middle portion when the EA material is compressed and deformed in the vehicle width direction toward the battery pack.

[0016] In one embodiment of the present technology, the battery pack may be provided with a bracket that protrudes outward in the vehicle width direction. The energy absorbing material may have, in the vehicle width direction, an inner end portion including an inner side wall and an intermediate portion adjacent to the inner end portion. The inner end portion of the energy absorbing material may be attached from below to a lower surface of the bracket of the battery pack. In this case, an upper wall of the intermediate portion of the energy absorbing material may be located lower than the lower surface of the bracket in the vehicle height direction. With this configuration, when the EA material is compressively deformed in the vehicle width direction toward the battery pack, contact between the EA material and the bracket of the battery pack can be avoided or suppressed. This makes it possible to reduce the collision load acting on the battery pack from the EA material.

[0017] In this specification, terms such as "forward," "rear," and "length direction" refer to the forward, rear, and length directions of a vehicle, respectively. Similarly, terms such as "left," "right," and "vehicle width direction" refer to the left, right, and width directions of a vehicle, respectively, and terms such as "upward," "downward," and "height direction" refer to the upward, downward, and height directions of a vehicle. Note that the vehicle width direction also refers to the left-right direction of the vehicle, and may be referred to as the left-right direction in this specification. For example, when a vehicle is placed on a horizontal plane, the vehicle height direction coincides with the vertical direction. Furthermore, the vehicle width direction is the direction parallel to the horizontal plane and parallel to the vehicle axles, and the vehicle length direction is the direction parallel to the horizontal plane and perpendicular to the vehicle axles. [Example]

[0018] (Example 1) A vehicle 10 of Example 1 will be described with reference to the drawings. The vehicle 10 of this example belongs to the category of electric vehicles having a motor 16 that drives wheels 14f, 14r, and is typically an electric vehicle (a so-called automobile) that runs on a road surface. However, some or all of the techniques described in this example can also be adopted in electric vehicles that run on tracks. Furthermore, the vehicle 10 is not limited to vehicles that are driven and operated by a user, but may also be remotely controlled by an external device or autonomously driven.

[0019] Here, the direction FR in the drawings indicates the front in the length direction (or the front-to-rear direction) of the vehicle 10, and the direction RR indicates the rear in the length direction of the vehicle 10. Furthermore, the direction LH indicates the left in the width direction (or the left-to-right direction) of the vehicle 10, and the direction RH indicates the right in the width direction of the vehicle 10. Furthermore, the direction UP indicates the upward direction in the height direction (or the up-down direction) of the vehicle 10, and the direction DW indicates the downward direction in the height direction of the vehicle 10.

[0020] As shown in FIG. 1, a vehicle 10 includes a body 12 and a plurality of wheels 14f, 14r. The body 12 has a passenger compartment 12c, which is a space for carrying passengers. The plurality of wheels 14f, 14r are rotatably attached to the body 12. The plurality of wheels 14f, 14r include a pair of front wheels 14f located at the front of the body 12 and a pair of rear wheels 14r located at the rear of the body 12. The pair of front wheels 14f are arranged coaxially with each other, and the pair of rear wheels 14r are also arranged coaxially with each other. The number of wheels 14f, 14r is not limited to four. Although not particularly limited, the body 12 is made of metal such as steel or aluminum alloy.

[0021] As shown in FIG. 1, the vehicle 10 further includes a motor 16, a power control unit 18, and a battery pack 20. The motor 16 is a traction motor that drives a pair of rear wheels 14r and is connected to the pair of rear wheels 14r. The battery pack 20 is a power supply device that supplies power to the motor 16 and is electrically connected to the motor 16 via the power control unit 18. The battery pack 20 incorporates multiple secondary battery cells and is configured to be repeatedly charged using external power or regenerative power from the motor 16. The battery pack 20 is located below and arranged along a floor panel 22. As an example, as shown in FIGS. 2 and 3, the battery pack 20 in this embodiment is provided with a bracket 20a that protrudes outward in the vehicle width direction. Although not particularly limited, a support portion 20b that protrudes downward is provided on the lower wall of the battery pack 20. The power control unit 18 has a built-in DC-DC converter and / or inverter, and controls the driving power supplied from the battery pack 20 to the motor 16 and the regenerative power supplied from the motor 16 to the battery pack 20, for example, in response to driving operations by the user.

[0022] The motor 16 is not limited to the pair of rear wheels 14r, but may be configured to drive at least one of the multiple wheels 14f, 14r. The vehicle 10 may further include another prime mover such as an engine instead of or in addition to the motor 16. The vehicle 10 may also include another power supply device such as a fuel cell unit or a solar panel in addition to or instead of the battery pack 20. The vehicle 10 is not limited to the electric vehicle described here, but may also be a hybrid vehicle, a fuel cell vehicle, a solar car, or the like.

[0023] As shown in Figures 2 and 3, the vehicle body 12 includes a floor panel 22, a pair of rockers 24, 26, and a floor cross beam 28. The floor panel 22 is a plate-like member that forms the bottom surface of the passenger compartment 12c. Each rocker 24, 26 is a hollow member having a constant cross section along the vehicle length direction and forms part of the framework of the vehicle body 12. The pair of rockers 24, 26 includes a left rocker 24 and a right rocker 26. The left rocker 24 is located at the left edge 22a of the floor panel 22 and extends in the front-rear direction on the outer side of the floor panel 22 in the vehicle width direction. The pair of rockers 24 are arranged symmetrically with respect to each other in the vehicle width direction. Therefore, the right rocker 26 is located at the right edge of the floor panel 22 and extends in the front-rear direction on the outer side of the floor panel 22 in the vehicle width direction.

[0024] Although not particularly limited, the left rocker 24 has a left rocker inner panel 24a located on the inside in the width direction and a left rocker outer panel 24b located on the outside in the width direction. The left rocker inner panel 24a and the left rocker outer panel 24b are joined to each other at their respective upper and lower edges, forming a closed space extending in the front-to-rear direction inside the left rocker 24. Similarly, although not particularly limited, the right rocker 26 has a right rocker inner panel 26a located on the inside in the width direction and a right rocker outer panel 26b located on the outside in the width direction. The right rocker inner panel 26a and the right rocker outer panel 26b are joined to each other at their respective upper and lower edges, forming a closed space extending in the front-to-rear direction inside the right rocker 26. The floor panel 22 extends between the pair of rockers 24, 26 and is joined to the left rocker inner panel 24a at its left edge 22a and to the right rocker inner panel 26a at its right edge. Each rocker 24, 26 is not limited to each rocker inner panel 24a, 26a and each rocker outer panel 24b, 26b, but may be composed of three or more panels.

[0025] The floor cross beam 28 is a hollow member having a constant cross section along the vehicle length direction, and constitutes part of the framework of the vehicle body 12. The floor cross beam 28 is located on the floor panel 22 and extends along the vehicle width direction between the pair of rockers 24, 26. Although not shown, multiple floor cross beams 28 are provided between the pair of rockers 24, 26.

[0026] As shown in FIGS. 2 and 3 , the vehicle 10 further includes a pair of energy absorbing materials 30, 32 (hereinafter referred to as EA materials 30, 32). Each of the pair of EA materials 30, 32 is a hollow member having a constant cross section along the vehicle length direction. The pair of EA materials 30, 32 includes a left EA material 30 and a right EA material 32. The pair of EA materials 30, 32 are arranged symmetrically with respect to each other in the vehicle width direction. The left EA material 30 is located on the left side of the vehicle 10, outside the battery pack 20 in the vehicle width direction. The right EA material 32 is located on the right side of the vehicle 10, outside the battery pack 20 in the vehicle width direction. When a side collision occurs to the vehicle 10, each of the EA materials 30, 32 absorbs collision energy by compressive deformation. The pair of EA materials 30, 32 are made of a metal such as aluminum. However, the material constituting the pair of EA materials 30, 32 is not particularly limited.

[0027] As described above, the pair of EA members 30, 32 are provided symmetrically with respect to each other in the vehicle width direction. The structure of the left EA member 30 and its associated members (e.g., the battery pack 20 and the left rocker 24, etc.) is symmetrical with the structure of the right EA member 32 and its associated members (e.g., the battery pack 20 and the right rocker 26, etc.) in the vehicle width direction. Therefore, the structure of the left EA member 30 and its associated members (e.g., the battery pack 20 and the left rocker 24, etc.) will be described below with reference to FIG. 3. Note that the left EA member 30 will be referred to simply as the EA member 30 below.

[0028] As shown in FIG. 3 , the EA material 30 includes an inner end portion 34, a first intermediate portion 36, a second intermediate portion 38, and an outer end portion 40. The inner end portion 34 is located at the innermost position in the vehicle width direction and faces the battery pack 20. The outer end portion 40 is located at the outermost position in the vehicle width direction. The first intermediate portion 36 and the second intermediate portion 38 are located between the inner end portion 34 and the outer end portion 40 in the vehicle width direction. The first intermediate portion 36 is adjacent to the inner end portion 34, and the second intermediate portion 38 is adjacent to the outer end portion 40. That is, the inner end portion 34, the first intermediate portion 36, the second intermediate portion 38, and the outer end portion 40 are located in this order from the inner side to the outer side in the vehicle width direction.

[0029] The inner end portion 34 has an inner side wall 34a, a vertical wall 34b, and a bottom wall 34c. The inner side wall 34a faces the battery pack 20 and slopes downward in the vehicle height direction as it moves inward in the vehicle width direction. The vertical wall 34b extends along the vehicle height direction, and the bottom wall 34c extends along the vehicle width direction. Therefore, the inner side wall 34a, the vertical wall 34b, and the bottom wall 34c form a space having a constant cross section in the vehicle length direction.

[0030] Although not particularly limited, the EA material 30 further includes a protrusion 35. The protrusion 35 is connected to the inner side wall 34a and the bottom wall 34c of the inner end portion 34, and extends toward the battery pack 20.

[0031] As shown in FIG. 3 , the vehicle 10 further includes a first collar 42 and a first bolt 44. An opening through which the first collar 42 passes is formed in an inner sidewall 34a provided at the inner end portion 34 of the EA member 30. The first collar 42 is disposed along the vehicle height direction so as to pass through the opening of the inner sidewall 34a. As an example, the first collar 42 is welded to the inner sidewall 34a of the EA member 30. The upper end of the first collar 42 abuts against the bracket 20a of the battery pack 20, and the lower end of the first collar 42 abuts against the lower wall 34c of the inner end portion 34. The first bolt 44 passes through the first collar 42 to fasten the EA member 30 to the bracket 20a of the battery pack 20. Therefore, the EA member 30 is fixed to the bracket 20a of the battery pack 20 at the inner end portion 34. The inner diameter D1 of the first collar 42 is larger than the nominal diameter D2 of the first bolt 44. For example, the inner diameter D1 of the first collar 42 is at least twice the nominal diameter D2 of the first bolt 44. In another embodiment, the EA material 30 may be directly fastened to the battery pack 20 by the first bolt 44 without providing the bracket 20a on the battery pack 20.

[0032] As shown in FIG. 3 , the vehicle 10 further includes a second collar 46 and a second bolt 48. Although not particularly limited, an opening through which the second collar 46 passes is also formed in the upper wall 38a of the second intermediate portion 38 of the EA material 30. The second collar 46 is arranged along the vehicle height direction so as to pass through the opening in the upper wall 38a of the second intermediate portion 38. As an example, the second collar 46 is welded to the upper wall 38a of the second intermediate portion 38. The upper end of the second collar 46 abuts against the left rocker inner panel 24a of the left rocker 24, and the lower end of the second collar 46 abuts against the lower wall 38b of the second intermediate portion 38. The second bolt 48 passes through the second collar 46 and fastens the EA material 30 to the left rocker 24. Therefore, the EA material 30 is fixed to the left rocker 24 of the vehicle body 12 at the second intermediate portion 38. As described above, the EA material 30 is fixed at the inner end portion 34 to the bracket 20a of the battery pack 20, and therefore the EA material 30 fixes the battery pack 20 to the vehicle body 12. Although not particularly limited, the inner diameter of the second collar 46 is larger than the nominal diameter of the second bolt 48.

[0033] In the above-described structure, as shown in Fig. 4, when a side collision occurs to the vehicle 10, the EA materials 30, 32 deform, thereby absorbing collision energy. Here, the inner side walls 34a of the EA materials 30, 32 facing the battery pack 20 are inclined downward in the vehicle height direction as they move inward in the vehicle width direction. Therefore, even when the EA materials 30, 32 are compressively deformed in the vehicle width direction toward the battery pack 20, contact between the EA materials 30, 32 and the side walls of the battery pack 20 can be avoided or suppressed. This makes it possible to reduce the collision load acting from the EA materials 30, 32 on the side walls of the battery pack 20.

[0034] Although not particularly limited, as shown in FIG. 5, the thickness T1 of the inner side wall 34a is greater than the thicknesses T4, T5 of the walls constituting the first intermediate portion 36. With this configuration, the rigidity of the inner side wall 34a of the EA materials 30, 32 facing the battery pack 20 can be made higher than the rigidity of the walls constituting the intermediate portion 36 of the EA materials 30, 32. As a result, when the EA materials 30, 32 are compressed and deformed in the vehicle width direction toward the battery pack 20, the inner side wall 34a of the EA materials 30, 32 can be made less likely to deform than the walls constituting the intermediate portion 36 of the EA materials 30, 32. Therefore, contact between the EA materials 30, 32 and the side walls of the battery pack 20 can be avoided or suppressed.

[0035] 5, in addition to the thickness T1 of the inner side wall 34a, the thickness T2 of the vertical wall 34b and the thickness T3 of the bottom wall 34c are also greater than the thicknesses T4, T5 of the walls constituting the first intermediate portion 36. That is, all of the thicknesses T1-T3 of the walls 34a-34c constituting the inner end portion 34 are greater than the thicknesses T4, T5 of the walls constituting the first intermediate portion 36. With this configuration, the rigidity of the walls 34a-34c of the inner end portion 34, including the inner side wall 34a facing the battery pack 20, can be made higher than the rigidity of the walls constituting the intermediate portion 36. As a result, when the EA materials 30, 32 are compressively deformed in the vehicle width direction toward the battery pack 20, the inner end portions 34 of the EA materials 30, 32 can be made less susceptible to deformation than the intermediate portions 36.

[0036] However, in other embodiments, the thickness T2 of the vertical wall 34b and the thickness T3 of the lower wall 34c may be equal to the thickness T4 (and / or T5) of each wall that constitutes the first intermediate portion 36, and only the thickness T1 of the inner side wall 34a may be greater than the thickness T4 (and / or T5) of each wall that constitutes the first intermediate portion 36. Alternatively, in still other embodiments, the thickness T1 of the inner side wall 34a, the thickness T2 of the vertical wall 34b, and the thickness T3 of the lower wall 34c may be equal to the thickness T4 (and / or T5) of each wall that constitutes the first intermediate portion 36.

[0037] (Example 2) Next, a vehicle of Example 2 will be described with reference to FIG. 6. Compared to the vehicle 10 of Example 1, in the vehicle of this example, the upper walls 36a of the first intermediate portions 36 of the EA materials 30, 32 are positioned at the same height from the inside to the outside in the vehicle width direction. Instead, the upper walls 36a of the first intermediate portions 36 (more specifically, the upper surfaces of the upper walls 36a) are inclined downward from the inside to the outside in the vehicle width direction. The inner end portions 34 of the EA materials 30, 32 are attached from below to the lower surfaces 20c of the brackets 20a of the battery pack 20. The upper walls 36a of the first intermediate portions 36 of the EA materials 30, 32 are positioned lower than the lower surfaces 20c of the brackets 20a in the vehicle height direction. With this configuration, when the EA materials 30, 32 are compressively deformed in the vehicle width direction toward the battery pack 20, contact between the EA materials 30, 32 and the brackets 20a of the battery pack 20 can be avoided or suppressed. This reduces the collision load acting on the battery pack 20 from the EA materials 30, 32. Note that the same reference numerals are used to designate the same components as those in the first embodiment and the present embodiment, and redundant explanations will be omitted here.

[0038] The configuration of this embodiment can also be adopted in Example 1. That is, even when the upper walls 36a of the first intermediate portions 36 of the EA materials 30, 32 are positioned at the same height from the inside to the outside in the vehicle width direction, the inner end portions 34 of the EA materials 30, 32 are attached from below to the lower surface 20c of the bracket 20a of the battery pack 20, and the upper walls 36a of the first intermediate portions 36 of the EA materials 30, 32 can be positioned lower than the lower surface 20c of the bracket 20a in the vehicle height direction. Even with this configuration, the collision load acting from the EA materials 30, 32 on the battery pack 20 during compressive deformation of the EA materials 30, 32 can be reduced.

[0039] Although several specific examples have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and alterations of the specific examples exemplified above. The technical elements described in this specification or drawings exhibit technical utility either alone or in combination. [Explanation of symbols]

[0040] 10: Vehicle 12: Body 12c: Cabin 14f: Front wheel 14r: Rear wheel 16: Motor 18: Power control unit 20: Battery pack 20a: Bracket 20b: Support part 20c: Underside of bracket 22: Floor panel 22a: left edge 24: Left side locker 24a: Left side rocker inner panel 24b: Left side rocker outer panel 26: Right side locker 26a: Right side rocker inner panel 26b: Right side rocker outer panel 28: Floor cross beam 30: Left energy absorber 32: Right energy absorber 34: Inner end part 34a: inner sidewall 34b: Vertical wall 34c: Lower wall 35:Protrusion 36: 1st middle part 36a: Upper wall 38: 2nd middle part 38a: Upper wall 38b: Lower wall 40: Outer end part 42: First color 44: First bolt 46: Second color 48: Second bolt D1: Inner diameter of first collar D2: Nominal diameter of the first bolt

Claims

1. a vehicle body having a floor panel; a battery pack located below the floor panel; an energy absorbing material that is located on an outer side of the battery pack in the vehicle width direction and that fixes the battery pack to the vehicle body; Equipped with the energy absorbing material is a hollow member having a constant cross section along the vehicle length direction, an inner side wall of the energy absorbing material facing the battery pack is inclined downward in a vehicle height direction toward the inner side in the vehicle width direction, a collar arranged along the vehicle height direction, the collar having an upper end abutting against the battery pack and a lower end abutting against the energy absorbing material; a bolt passing through the collar and fastening the energy absorbing material to the battery pack; The inner sidewall of the energy absorbing material has an opening formed therein through which the collar passes. vehicle.

2. The vehicle of claim 1 , wherein the collar is welded to the inner sidewall of the energy absorber.

3. a vehicle body having a floor panel; a battery pack located below the floor panel; an energy absorbing material that is located on an outer side of the battery pack in the vehicle width direction and that fixes the battery pack to the vehicle body; Equipped with the energy absorbing material is a hollow member having a constant cross section along the vehicle length direction, an inner side wall of the energy absorbing material facing the battery pack is inclined downward in a vehicle height direction toward the inner side in the vehicle width direction, a collar arranged along the vehicle height direction, the collar having an upper end abutting against the battery pack and a lower end abutting against the energy absorbing material; a bolt passing through the collar and fastening the energy absorbing material to the battery pack; the collar is welded to the inner sidewall of the energy absorber; vehicle.

4. The vehicle according to claim 1 , wherein the inner diameter of the collar is at least twice the nominal diameter of the bolt.

5. The battery pack is provided with a bracket that protrudes outward in the vehicle width direction, The vehicle according to claim 1 , wherein the bolt fastens the energy absorbing material to the bracket of the battery pack.

6. the energy absorbing material has, in the vehicle width direction, an inner end portion including the inner side wall and an intermediate portion adjacent to the inner end portion, 6. The vehicle according to claim 1, wherein the thickness of the inner side wall of the energy absorber is greater than the thickness of each wall constituting the intermediate portion of the energy absorber.

7. The vehicle according to claim 6 , wherein the thickness of each wall constituting the inner end portion of the energy absorbing material is greater than the thickness of each wall constituting the intermediate portion of the energy absorbing material.

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