vehicle

Abstract

To provide a technology which enables reduction of a buffer load transmitted from an energy absorption 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 that is 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. A lower wall of the battery pack is provided with a support part protruding downward. The energy absorption material includes a protruding part protruding to the inner side as seen in the vehicle width direction toward the support part. A tip of the protruding part is provided with a contact surface which contacts with a side surface of the support part 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 outside the battery pack in the vehicle width direction and fixing the battery pack to the vehicle body. A support portion protruding downward is provided on a lower wall of the battery pack. The energy absorbing material includes a protruding portion protruding inward in the vehicle width direction toward the support portion. A tip of the protruding portion is provided with an abutment surface that abuts against a side surface of the support portion in the vehicle width direction.

[0007] In the above-described structure, when a side collision occurs to the vehicle, the EA material deforms, thereby absorbing collision energy. The EA material has a protruding portion that protrudes inward in the vehicle width direction toward a support portion provided on the lower wall of the battery pack, and the tip of the protruding portion is provided with an abutment surface that abuts against the side surface of the support portion. Therefore, when a side collision occurs to the vehicle, the collision load applied to the EA material is transmitted via the protruding portion to the support portion provided on the lower wall of the battery pack. This reduces the collision load transmitted from the EA material to the side wall of the battery pack. [Brief explanation of the drawings]

[0008] [Figure 1] 1 shows a schematic diagram of a vehicle 10 according to an embodiment of the present invention. [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] 10A and 10B are diagrams illustrating modified shapes of the contact surface 35a of the protrusion 35 and the side surface 20c of the support portion 20b. [Figure 7]10A and 10B are diagrams illustrating modified shapes of the contact surface 35a of the protrusion 35 and the side surface 20c of the support portion 20b. [Figure 8] 10A and 10B are diagrams illustrating modified shapes of the contact surface 35a of the protrusion 35 and the side surface 20c of the support portion 20b. [Figure 9] 10A and 10B are diagrams illustrating modified shapes of the contact surface 35a of the protrusion 35 and the side surface 20c of the support portion 20b. DETAILED DESCRIPTION OF THE INVENTION

[0009] In one embodiment of the present technology, the dimension of the abutment surface of the protrusion in the vehicle height direction may be equal to or greater than the dimension of the side surface of the support portion in the vehicle height direction. With this configuration, when a side collision occurs to the vehicle, it is possible to avoid or suppress the protrusion of the EA material from being pressed locally against the side surface of the support portion provided on the battery pack. This makes it possible to avoid or suppress the collision load being transmitted to the support portion from being locally concentrated.

[0010] Alternatively, the dimension of the contact surface of the protrusion in the vehicle height direction may be greater than the dimension of the side surface of the support portion in the vehicle height direction. However, in another embodiment, the dimension of the contact surface of the protrusion in the vehicle height direction may be equal to or less than the dimension of the side surface of the support portion in the vehicle height direction.

[0011] In one embodiment of the present technology, at least a portion of the protrusion may be located below the battery pack and extend along a bottom wall of the battery pack. With this configuration, the dimension of the portion of the EA material that is advantageous for absorbing collision energy in the vehicle width direction can be increased by the dimension of the protrusion located below the battery pack in the vehicle width direction. As a result, when a side collision occurs to the vehicle, the EA material deforms, thereby increasing the amount of collision energy absorbed.

[0012] In the above-described embodiment, the protrusion may be fixed to the lower wall of the battery pack via a bolt. This configuration allows the protrusion to be firmly fixed to the battery pack. Therefore, when the EA material is compressed and deformed in the vehicle width direction toward the side wall of the protrusion, it is possible to prevent or suppress the protrusion from unintentionally detaching from the battery pack. However, in another embodiment, the protrusion may be fixed to the lower wall of the battery pack via an adhesive or the like instead of a bolt.

[0013] In one embodiment of the present technology, the protruding portion may have a plate shape extending in the vehicle width direction. In this case, the thickness of the protruding portion may be greater than the thickness of each wall constituting the remaining portion of the energy absorbing material. With this configuration, in the EA material, the rigidity of the plate-shaped protruding portion can be made higher than the rigidity of each wall constituting the remaining portion excluding the protruding portion. This makes it possible to make the protruding portion less likely to deform than the walls constituting the remaining portion of the EA material when the EA material is compressed and deformed in the vehicle width direction toward the battery pack. Therefore, collision energy generated by a side collision of the vehicle is absorbed mainly by deformation of part or all of the remaining portion of the EA material excluding the protruding portion.

[0014] In one embodiment of the present technology, the thickness of the protrusion may increase toward the abutment surface at least in a portion of the protrusion adjacent to the abutment surface. With this configuration, the minimum ground clearance of the protrusion (i.e., the distance along the vehicle height direction from the ground surface to the lowest surface of the protrusion) can be made relatively high while maintaining the rigidity of the abutment surface provided on the protrusion.

[0015] In one embodiment of the present technology, the support portion may be provided on a separate member attached to the battery pack, but in another embodiment, the support portion may be provided integrally with the battery pack.

[0016] In one embodiment of the present technology, the contact surface of the protrusion and the side surface of the support portion may be formed with a concave-convex shape that engages with each other. This configuration increases the area where the contact surface of the protrusion contacts the side surface of the support portion. In particular, if the concave-convex shape is formed along the vehicle height direction, the contact surface of the protrusion can be prevented from separating from the side surface of the support portion when a side collision of the vehicle occurs. This allows the collision load applied to the EA material when a side collision of the vehicle occurs to be effectively transmitted via the protrusion to the support portion provided on the lower wall of the battery pack.

[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] A vehicle 10 according to the embodiment will be described with reference to the drawings. The vehicle 10 according to the embodiment 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 the embodiment 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, and may be remotely controlled by an external device or may run autonomously.

[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 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. A support portion 20b that protrudes downward is provided on a bottom wall 20d of the battery pack 20. The support portion 20b is, for example, an undercover for protecting the bottom wall 20d of the battery pack 20 and is attached to the bottom wall 20d of the battery pack 20 as a separate member from 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. However, the support portion 20b does not need to be provided on a separate member attached to the battery pack 20, and may be provided integrally with the battery pack 20.

[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] Although not particularly limited, 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] 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 side wall 34a provided at the inner end portion 34 of the EA material 30. The first collar 42 is arranged along the vehicle height direction so as to pass through the opening of the inner side wall 34a. Although not particularly limited, the first collar 42 is welded to the inner side wall 34a of the EA material 30. An upper end of the first collar 42 abuts against the bracket 20a of the battery pack 20, and a 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 and fastens the EA material 30 to the bracket 20a of the battery pack 20. As a result, the EA material 30 is fixed to the bracket 20a of the battery pack 20 at the inner end portion 34. Although not particularly limited, the inner diameter of the first collar 42 is larger than the nominal diameter 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.

[0031] As shown in FIG. 3 , the vehicle 10 further includes a second collar 46 and a second bolt 48. Although not limited thereto, 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. Although not limited thereto, 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. As a result, 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.

[0032] The position where the EA material 30 is fixed to the bracket 20a of the battery pack 20 does not necessarily have to be the inner end portion 34. The position where the EA material 30 is fixed to the bracket 20a of the battery pack 20 can be changed as appropriate depending on the shape of the EA material 30, the positional relationship between the EA material 30 and the battery pack 20, etc. Similarly, the position where the EA material 30 is fixed to the left rocker 24 of the vehicle body 12 does not necessarily have to be the second intermediate portion 38. The position where the EA material 30 is fixed to the left rocker 24 of the vehicle body 12 can be changed as appropriate depending on the shape of the EA material 30, the positional relationship between the EA material 30 and the left rocker 24, etc.

[0033] As shown in FIG. 3 , the EA material 30 further includes a protrusion 35. The protrusion 35 is connected to an inner side wall 34a and a lower wall 34c of the inner end portion 34 and protrudes inward in the vehicle width direction toward a support portion 20b provided on the battery pack 20. The protrusion 35 is located below the battery pack 20 and extends along the lower wall 20d of the battery pack 20. The protrusion 35 is fixed to the lower wall 20d of the battery pack 20 via a third bolt 50. A contact surface 35a is provided at the tip of the protrusion 35 and contacts the side surface 20c of the support portion 20b in the vehicle width direction. Note that the entire protrusion 35 does not need to be located below the battery pack 20; it is sufficient that at least a portion of the protrusion 35 is located below the battery pack 20. In another embodiment, the protrusion 35 may be fixed to the lower wall 20d of the battery pack 20 via an adhesive or the like instead of the third bolt 50.

[0034] 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. The EA materials 30, 32 are provided with a protruding portion 35 that protrudes inward in the vehicle width direction toward the support portion 20b provided on the lower wall 20d of the battery pack 20, and a contact surface 35a that contacts the side surface 20c of the support portion 20b is provided at the tip of the protruding portion 35. Therefore, when a side collision occurs to the vehicle 10, the collision load applied to the EA materials 30, 32 is transmitted to the support portion 20b provided on the lower wall 20d of the battery pack 20 via the protruding portion 35. This reduces the collision load transmitted from the EA materials 30, 32 to the side wall of the battery pack 20.

[0035] 5, the dimension H1 in the vehicle height direction of the contact surface 35a of the protrusion 35 is equal to or greater than the dimension H2 in the vehicle height direction of the side surface 20c of the support portion 20b. More specifically, the dimension H1 is greater than the dimension H2 in the vehicle height direction of the side surface 20c of the support portion 20b. This configuration can prevent or suppress the protrusion 35 of the EA material 30, 32 from being locally pressed against the side surface 20c of the support portion 20b provided on the battery pack 20 in the event of a side collision of the vehicle 10. This can prevent or suppress the collision load from being transmitted to the support portion 20b from being locally concentrated. However, in another embodiment, the dimension H1 in the vehicle height direction of the contact surface 35a of the protrusion 35 may be smaller than the dimension H2 in the vehicle height direction of the side surface 20c of the support portion 20b.

[0036] 5, the protruding portion 35 has a plate shape extending in the vehicle width direction. In this case, the thickness T1 of the protruding portion 35 is greater than the thickness of each wall constituting the remaining portion of the EA material 30 (i.e., the thicknesses T2 and T3 of the walls 34a-34c constituting the inner end portion 34, the thickness of each wall constituting the first intermediate portion 36, the thickness of each wall 38a-38b constituting the second intermediate portion 38, and the thickness of the wall constituting the outer end portion 40). This configuration allows the rigidity of the plate-shaped protruding portion 35 in the EA materials 30, 32 to be higher than the rigidity of each wall constituting the remaining portion excluding the protruding portion 35. This makes it possible to make the protruding portion 35 less likely to deform than the walls constituting the remaining portions of the EA materials 30, 32, i.e., the inner end portion 34, the first intermediate portion 36, the second intermediate portion 38, and the outer end portion 40, when the EA materials 30, 32 are compressively deformed in the vehicle width direction toward the battery pack 20. Therefore, the collision energy generated by a side collision of the vehicle 10 is absorbed mainly by the deformation of part or all of the remaining portions of the EA materials 30, 32 excluding the protruding portions 35.

[0037] 5, at least in the portion of the protrusion 35 adjacent to the abutment surface 35a, the thickness of the protrusion 35 increases toward the abutment surface 35a. In other words, the thickness T1 of the protrusion 35 increases toward the abutment surface 35a. For example, the thickness of the protrusion 35 at the portion where the third bolt 50 is disposed can be made relatively small, and the thickness of the abutment surface 35a at the tip of the protrusion 35 (i.e., the dimension H1 of the abutment surface 35a in the vehicle height direction) can be made relatively large. With this configuration, the rigidity of the abutment surface 35a provided on the protrusion 35 can be maintained while the minimum ground clearance of the protrusion 35 (i.e., the distance in the vehicle height direction from the ground surface to the lowest surface of the protrusion 35) can be made relatively high.

[0038] Alternatively, as shown in FIGS. 6-9, the thickness T1 of the protrusion 35 may be constant. In this case, the thickness T1 of the protrusion 35 may be equal to the dimension H1 of the contact surface 35a of the protrusion 35 in the vehicle height direction. The contact surface 35a at the tip of the protrusion 35 and the side surface 20c of the support portion 20b may have various shapes. For example, as shown in FIGS. 7-9, the contact surface 35a at the tip of the protrusion 35 has a shape that protrudes inward in the vehicle width direction toward the side surface 20c of the support portion 20b. The side surface 20c of the support portion 20b is recessed inward in the vehicle width direction to receive the contact surface 35a of the protrusion 35. In this way, if the contact surface 35a of the protrusion 35 and the side surface 20c of the support portion 20b have engaging concave and convex shapes, the area where the contact surface 35a of the protrusion 35 abuts against the side surface 20c of the support portion 20b can be increased. In particular, if the uneven shape is formed along the vehicle height direction, it is possible to prevent the contact surface 35a of the protrusion 35 from separating from the side surface 20c of the support portion 20b when a side collision occurs to the vehicle 10. As a result, when a side collision occurs to the vehicle 10, the collision load applied to the EA materials 30, 32 is effectively transmitted via the protrusion 35 to the support portion 20b provided on the lower wall 20d of the battery pack 20.

[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: Side 20d: Lower wall 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: Side wall 34b: Vertical wall 34c: Lower wall 35:Protrusion 35a: Contact surface 36: 1st middle part 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 50: 3rd 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 a support portion that protrudes downward is provided on a lower wall of the battery pack; the energy absorbing material includes a protruding portion that protrudes inward in the vehicle width direction toward the support portion, a contact surface that contacts a side surface of the support portion in the vehicle width direction is provided at a tip of the protrusion; The protruding portion has a plate shape extending in the vehicle width direction, The thickness of the protrusion is greater than the thickness of each wall constituting the remainder of the energy absorbing material. vehicle.

2. 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 a support portion that protrudes downward is provided on a lower wall of the battery pack; the energy absorbing material includes a protruding portion that protrudes inward in the vehicle width direction toward the support portion, a contact surface that contacts a side surface of the support portion in the vehicle width direction is provided at a tip of the protrusion; At least in a portion of the protrusion adjacent to the contact surface, the thickness of the protrusion increases toward the contact surface. vehicle.

3. The vehicle according to claim 1 or 2, wherein a dimension of the contact surface of the protrusion in the vehicle height direction is equal to or greater than a dimension of the side surface of the support portion in the vehicle height direction.

4. The vehicle according to claim 1 or 2, wherein a dimension of the contact surface of the protrusion in the vehicle height direction is greater than a dimension of the side surface of the support portion in the vehicle height direction.

5. The vehicle according to claim 1 , wherein at least a portion of the protrusion is located below the battery pack and extends along the bottom wall of the battery pack.

6. The vehicle according to claim 5 , wherein the protrusion is fixed to the bottom wall of the battery pack via a bolt.

7. The vehicle according to claim 1 , wherein the support portion is provided on a separate member attached to the battery pack.

8. The vehicle according to claim 1 , wherein the support portion is provided integrally with the battery pack.

9. The vehicle according to claim 1 , wherein the contact surface of the protruding portion and the side surface of the support portion are formed with concave and convex shapes that engage with each other.

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