vehicle

Abstract

To provide a technology that is able to improve the performance of a protect plate in both the manufacturing aspect and performance aspect.SOLUTION: A vehicle includes: a vehicle body having a floor panel; a battery pack located below the floor panel in a vehicle height direction; and a protect plate attached to a lower surface of the battery pack. The protect plate is a hollow member having a plurality of internal spaces between a pair of upper and lower walls. The upper wall of the protect plate is fixed to the lower surface of the battery pack by a plurality of fasteners located in the plurality of internal spaces. The lower wall of the protect plate is provided with openings at positions opposite to the plurality of fasteners.SELECTED DRAWING: Figure 4

Description

Technical Field

[0004] , , ,

[0001] The technology disclosed in this specification relates to vehicles.

Background Art

[0002] Patent Document 1 describes a vehicle. This vehicle includes a vehicle body having a floor panel, a battery pack located below the floor panel in the vehicle height direction, and a protection plate attached to the lower surface of the battery pack. The protection plate has a hollow structure in which a corrugated intermediate wall is disposed between a pair of upper walls and a lower wall. The upper wall and the intermediate wall of the protection plate are fixed to the battery pack by a plurality of fasteners located on both sides of the battery pack. And the lower wall of the protection plate is fixed to the battery pack so as to cover the upper wall and the intermediate wall, and is fixed to the floor panel.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above configuration, the protection plate for protecting the battery pack is composed of a plurality of members. Therefore, when manufacturing the vehicle, it is necessary to assemble the plurality of members respectively, and there is a problem that the man-hours increase. In order to avoid this, it is conceivable to configure part or all of the protection plate with an integral part. However, when an integrally formed protection plate is attached to the lower surface of the battery pack by a plurality of fasteners, it is assumed that those fasteners protrude downward from the protection plate. Such protrusion of the fasteners may cause unintended contact with the road surface or affect the aerodynamic characteristics of the vehicle.

[0005] In view of the above, this specification provides a technology that can improve the performance of protective plates in terms of both manufacturing and performance. [Means for solving the problem]

[0006] The technology disclosed herein is embodied in a vehicle. In a first embodiment, the vehicle comprises a body having a floor panel, a battery pack located below the floor panel in the vehicle height direction, and a protective plate attached to the lower surface of the battery pack. The protective plate is a hollow structure member having a plurality of internal spaces between a pair of upper and lower walls. The upper wall of the protective plate is fixed to the lower surface of the battery pack by a plurality of fasteners located in the plurality of internal spaces. The lower wall of the protective plate is provided with openings at positions facing the plurality of fasteners.

[0007] In the vehicle described above, the upper wall of the hollow protective plate is fixed to the underside of the battery pack by multiple fasteners located within its internal space. With this configuration, each of the multiple fasteners is positioned at least partially within the internal space of the protective plate. This prevents or suppresses the multiple fasteners that fix the protective plate from protruding downward from the protective plate when the protective plate is attached to the underside of the battery pack. As a result, unintended contact between these fasteners and the road surface, and their impact on the vehicle's aerodynamic characteristics, can be avoided or suppressed. Furthermore, the lower wall of the protective plate in this technology is provided with openings at each position facing the multiple fasteners. Therefore, each fastener located within the internal space of the protective plate can be easily tightened through these openings. This allows the protective plate, which is a hollow structural member, to be fixed to the underside of the battery pack in a single installation operation. [Brief explanation of the drawing]

[0008] [Figure 1] The configuration of the vehicle 10 in this embodiment is schematically shown. [Figure 2] Cross-sectional view along line II-II in Figure 1. [Figure 3] A diagram illustrating the internal structure of the battery pack 20. Note that the upper cover 46 and the multiple secondary battery cells 42 are not shown. [Figure 4] Cross-sectional view along line IV-IV in Figure 3. [Figure 5] A diagram illustrating the structure of the protective plate 62. [Figure 6] This shows an example of the behavior of the protective plate 62 when a load is applied to the protective plate 62 from below in the vehicle height direction. [Modes for carrying out the invention]

[0009] In a second embodiment, in the first embodiment described above, the battery pack may have at least one skeletal member inside. In this case, the multiple fasteners may be fastened to at least one skeletal member. With such a configuration, the rigidity of the battery pack can be improved by the protective plate fixed to the battery pack.

[0010] In a third embodiment, in the first or second embodiment described above, the multiple internal spaces of the protective plate may extend along the vehicle width direction with a constant cross-sectional shape. With such a configuration, by changing the distance between two adjacent internal spaces, the cross-sectional shape of each internal space, etc., it is possible to achieve both weight reduction of the protective plate and rigidity against impacts input from the vehicle width direction. However, in other embodiments, the multiple internal spaces of the protective plate may extend along the vehicle length direction with a constant cross-sectional shape.

[0011] In a fourth embodiment, in any of the first to third embodiments described above, the protective plate may include a plurality of vertical walls connecting the upper wall and the lower wall. In this case, each of the plurality of vertical walls may be molded integrally with the upper wall and the lower wall. With such a configuration, the rigidity of the protective plate can be improved compared to the case in which the plurality of vertical walls of the protective plate are joined to the upper wall and the lower wall by welding or the like. In addition, since the entire protective plate can be made from a single component, the man-hours required for assembling the protective plate can be reduced.

[0012] In the fifth embodiment, in any of the first to fourth embodiments described above, the lower end of the fastener may be located above the lower surface of the lower wall of the protect plate in the vehicle height direction. With this configuration, when the protect plate is attached to the lower surface of the battery pack by multiple fasteners, it is possible to avoid the multiple fasteners protruding downward from the protect plate.

[0013] In the sixth embodiment, in any of the first to fifth embodiments described above, a gap may be provided between the protective plate and the lower surface of the battery pack in the vehicle height direction. With such a configuration, it is possible to avoid or suppress the transmission of loads applied to the protective plate from below in the vehicle height direction to the lower surface of the battery pack. Although not particularly limited, foamed fibrous insulation material or foamed insulation material may be provided in this gap. Even in this case, it is possible to avoid or suppress the transmission of loads applied to the protective plate from below in the vehicle height direction to the lower surface of the battery pack.

[0014] In the seventh embodiment, in any of the first to sixth embodiments described above, the battery pack may have a lower plate that constitutes the bottom surface of the battery pack. In this case, the lower plate may be provided with a cooling path for circulating coolant. With such a configuration, there is no need to provide a cooler inside the battery pack, the number of components constituting the battery pack can be reduced, and the battery pack can be made smaller.

[0015] In the eighth aspect, the protective plate may be made of metal in any of the first to seventh aspects described above. With such a configuration, it is possible to avoid damage to the protective plate when a load is applied to it.

[0016] In this specification, descriptions such as "front," "rear," and "length" refer to the front, rear, and length directions of a vehicle, respectively. Similarly, descriptions such as "left," "right," and "width" refer to the left, right, and width directions of a vehicle, respectively, and descriptions such as "up," "down," and "height" refer to the up, down, and height directions of a vehicle. Note that the width direction of a vehicle is also the left-right direction of the vehicle, and is sometimes expressed as the left-right direction in this specification. For example, when a vehicle is positioned on a horizontal plane, the height direction of the vehicle coincides with the vertical direction. The width direction of a vehicle is parallel to the horizontal plane and parallel to the vehicle's axles, and the length direction of a vehicle is parallel to the horizontal plane and perpendicular to the vehicle's axles. [Examples]

[0017] The vehicle 10 of this embodiment will be described with reference to the drawings. The vehicle 10 of this embodiment belongs to the category of electric vehicles having motors 16 that drive wheels 14f and 14r, and is typically an electric vehicle (so-called automobile) that runs on roads. However, some or all of the technologies described in this embodiment can also be similarly applied to electric vehicles that run on tracks. Furthermore, the vehicle 10 is not limited to those operated by a user, but may also be remotely controlled by an external device or be autonomous.

[0018] Here, the direction FR in the drawings indicates the front in the longitudinal direction (or the front-rear direction) of the vehicle 10, and the direction RR indicates the rear in the longitudinal direction of the vehicle 10. Also, the direction LH indicates the left in the vehicle width direction (or the left-right direction) of the vehicle 10, and the direction RH indicates the right in the vehicle width direction of the vehicle 10. Further, the direction UP indicates the upper side in the height direction (or the up-down direction) of the vehicle 10, and the direction DW indicates the lower side in the height direction of the vehicle 10.

[0019] As shown in FIG. 1, the vehicle 10 includes a vehicle body 12 and a plurality of wheels 14f, 14r. The vehicle 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 vehicle body 12. The plurality of wheels 14f, 14r include a pair of front wheels 14f located at the front of the vehicle body 12 and a pair of rear wheels 14r located at the rear of the vehicle 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. Note that the number of the wheels 14f, 14r is not limited to four. Although not particularly limited, the vehicle body 12 is made of a metal such as a steel material or an aluminum alloy.

[0020] 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 traveling 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 a plurality of secondary battery cells 42 and is configured to be repeatedly charged by external power or the regenerative power of the motor 16. The battery pack 20 is located below the floor panel 22 and is arranged along the floor panel 22. The power control unit 18 incorporates a DC-DC converter and / or an inverter and controls, for example, the drive 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 according to the driving operation by the user.

[0021] The motor 16 is not limited to a pair of rear wheels 14r, and may be configured to drive at least one of the plurality of wheels 14f and 14r. The vehicle 10 may further include another prime mover such as an engine instead of or in addition to the motor 16. Also, in addition to the battery pack 20, the vehicle 10 may include other power supply devices such as a fuel cell unit and a solar cell panel. The vehicle 10 is not limited to the electric vehicle described herein, and may be a hybrid vehicle, a fuel cell vehicle, a solar car, or the like.

[0022] As shown in FIG. 2, the vehicle body 12 includes a floor panel 22, a pair of rockers 24, and a floor cross beam 26. The floor panel 22 is a plate-like member that forms the bottom surface of the passenger compartment 12c. Each rocker 24 is a longitudinal member having a hollow structure and forms a part of the skeleton of the vehicle body 12. The pair of rockers 24 are located at both side edges 22a of the floor panel 22 and extend in the front-rear direction on the outside in the vehicle width direction of the floor panel 22. The pair of rockers 24 are provided symmetrically with respect to the vehicle width direction. Therefore, in FIG. 2, only the rocker 24 provided on the left side portion of the vehicle 10 is shown, and the illustration of the rocker 24 provided on the right side portion is omitted.

[0023] Although not particularly limited, the rocker 24 in the present embodiment has a rocker inner panel 24a located on the inner side in the width direction and a rocker outer panel 24b located on the outer side in the width direction. The rocker inner panel 24a and the rocker outer panel 24b are joined to each other at their upper and lower edges, and a closed space extending in the front-rear direction is formed inside the rocker 24. The floor panel 22 extends between the pair of rockers 24 and is joined to the rocker inner panel 24a at both side edges 22a. Note that the rocker 24 is not limited to only the rocker inner panel 24a and the rocker outer panel 24b, and may be composed of three or more panels.

[0024] The floor crossbeam 26 is a longitudinal member having a hollow structure and constitutes part of the frame of the vehicle body 12. The floor crossbeam 26 is located on the floor panel 22 and extends along the vehicle width direction between a pair of rockers 24. Although not shown, multiple floor crossbeams 26 are provided between the pair of rockers 24.

[0025] As shown in Figure 2, the vehicle 10 further comprises a pair of energy-absorbing materials 28 (hereinafter sometimes referred to as EA materials 28). The pair of EA materials 28 are arranged symmetrically with respect to the vehicle width direction. As shown in Figure 2, one EA material 28 is located on the left side of the vehicle 10, on the outside of the battery pack 20 in the vehicle width direction. The other EA material 28, although not shown, is located on the right side of the vehicle 10, on the outside of the battery pack 20 in the vehicle width direction. The EA materials 28 absorb collision energy by compressive deformation when a side collision occurs to the vehicle 10. The EA materials 28 are made of a metal such as aluminum, for example. However, the material constituting the EA materials 28 is not particularly limited.

[0026] As shown in Figure 2, the EA material 28 comprises an inner end portion 30, an intermediate portion 32, and an outer end portion 34. The inner end portion 30 is located furthest inward in the vehicle width direction and faces the battery pack 20. The outer end portion 34 is located furthest outward in the vehicle width direction. The intermediate portion 32 is located between the inner end portion 30 and the outer end portion 34 in the vehicle width direction. That is, the inner end portion 30, intermediate portion 32, and outer end portion 34 are located in order from the inside to the outside in the vehicle width direction. The inner end portion 30 of the EA material 28 is fixed to the battery pack 20 by bolts 36, although this is not particularly limited. The intermediate portion 32 of the EA material 28 is fixed to the rocker 24 by bolts 38.

[0027] As shown in Figure 2, the EA material 28 further includes a protrusion 40. The protrusion 40 is connected to the inner side wall and bottom wall of the inner end portion 30. The protrusion 40 is located below the battery pack 20 and extends along the bottom wall of the battery pack 20. The protrusion 40 is fixed to the bottom wall of the battery pack 20 by adhesive or the like, although this is not particularly limited. Note that the entire protrusion 40 does not need to be located below the battery pack 20; it is sufficient if at least a part of the protrusion 40 is located below the battery pack 20.

[0028] Next, the battery pack 20 and its related structure will be described. As shown in Figure 2, the battery pack 20 comprises a plurality of secondary battery cells 42 and a battery pack case 44. Each of the plurality of secondary battery cells 42 is a rechargeable secondary battery cell, such as a lithium-ion secondary battery cell. The plurality of secondary battery cells 42 are stacked along the vehicle width direction. The battery pack case 44 is a housing member that accommodates the plurality of secondary battery cells 42 and has a sealed structure.

[0029] As shown in Figures 2 and 3, the battery pack case 44 further comprises an upper cover 46 and a lower cover 48. The upper cover 46 is a plate-shaped member that constitutes the battery pack case 44. The upper cover 46 is provided on the upper part of the battery pack case 44 so as to cover a plurality of secondary battery cells 42. The lower cover 48 is provided on the lower part of the battery pack case 44 so as to support a plurality of secondary battery cells 42. The upper cover 46 and the lower cover 48 face each other in the vehicle height direction. Therefore, the upper cover 46 constitutes the upper surface of the battery pack case 44, and the lower cover 48 constitutes the lower surface of the battery pack case 44.

[0030] The lower cover 48 comprises an upper lower cover 50 and a lower lower cover 52. The upper lower cover 50 is a plate-shaped member. The lower lower cover 52 is a corrugated plate-shaped member, and a plurality of grooves 52a are provided on the surface facing the upper lower cover 50. Each of the plurality of secondary battery cells 42 is arranged on the upper surface of the upper lower cover 50. The lower surface of the upper lower cover 50 faces the upper surface of the lower lower cover 52. As a result, a cooling path is formed between the lower surface of the upper lower cover 50 and the upper surface of the lower lower cover 52 by the plurality of grooves 52a provided on the lower lower cover 52. By circulating a cooling liquid through this cooling path, the plurality of secondary battery cells 42 can be cooled. In this way, the lower cover 48 constitutes the lower surface of the battery pack case 44 and can function as a cooler for cooling the plurality of secondary battery cells 42. Note that the lower cover 48 in this embodiment is an example of a lower plate in this technology. Furthermore, although not particularly limited, the coolant is water.

[0031] As shown in Figures 2 and 3, the battery pack case 44 further comprises a front wall 54, a rear wall 56, and a pair of side walls 58. Each of the front wall 54, the rear wall 56, and the pair of side walls 58 is a plate-shaped member constituting the battery pack case 44. The front wall 54 extends in the vehicle width direction at the front of the battery pack case 44. The rear wall 56 extends in the vehicle width direction at the rear of the battery pack case 44. The front wall 54 and the rear wall 56 face each other in the vehicle length direction. The pair of side walls 58 extend in the vehicle length direction at each end of the battery pack case 44 and face each other in the vehicle width direction. Therefore, the front wall 54 constitutes the front surface of the battery pack case 44, the rear wall 56 constitutes the rear surface of the battery pack case 44, and the pair of side walls 58 constitute a pair of sides of the battery pack case 44. As a result, the front wall 54, rear wall 56, and the pair of side walls 58, together with the upper cover 46 and lower cover 48, form a sealed structure for the battery pack case 44. In addition, each of the pair of side walls 58 is provided with a bracket 58a that protrudes outward in the vehicle width direction. The inner end portion 30 of the aforementioned EA material 28 is fixed to the bracket 58a of the battery pack 20 by bolts 36.

[0032] As shown in Figure 3, the battery pack 20 further comprises a plurality of inner walls 60a-60c. The plurality of inner walls 60a-60c are structural members for reinforcing the battery pack case 44 and are provided inside the battery pack case 44. The lower end of each of the plurality of inner walls 60a-60c is connected to the lower cover 48. The plurality of inner walls 60a-60c include a first inner wall 60a, a second inner wall 60b, and a third inner wall 60c. The first inner wall 60a and the second inner wall 60b extend along the vehicle length direction and are arranged at predetermined intervals. The third inner wall 60c extends along the vehicle width direction and each end is connected to a pair of side walls 58. The front end of the first inner wall 60a is connected to the third inner wall 60c, and the rear end of the first inner wall 60a is connected to the rear wall 56. Similarly, the front end of the second inner wall 60b is connected to the third inner wall 60c, and the rear end of the second inner wall 60b is connected to the rear wall 56. The upper ends of the first inner wall 60a and the second inner wall 60b are connected to the upper cover 46 via rubber members, although this is not particularly limited. The first inner wall 60a, the second inner wall 60b, and the third inner wall 60c in this specification are examples of skeletal members located inside the battery pack 20 in this technology. However, the battery pack 20 does not necessarily need to have all of the first inner wall 60a, the second inner wall 60b, and the third inner wall 60c; it may have at least one of them.

[0033] As shown in Figures 2 and 4, the vehicle 10 further comprises a protective plate 62. The protective plate 62 is a hollow structural member. The protective plate 62 is attached to the lower cover 48 of the battery pack 20. The protective plate 62 comprises a pair of upper walls 64 and lower walls 66 and a plurality of vertical walls 68 connecting them. For example, each of the plurality of vertical walls 68 is molded integrally with the upper wall 64 and lower wall 66. A plurality of internal spaces IS are formed between the pair of upper walls 64 and lower walls 66. Each of these internal spaces IS extends along the vehicle width direction with a constant cross-sectional shape. The protective plate 62 is made of a metal such as aluminum, although this is not particularly limited.

[0034] As shown in Figure 5, the protective plate 62 has a structure in which a plurality of hollow plate materials arranged along the vehicle width direction are pre-integrated by welding. However, in other embodiments, the protective plate 62 may be constructed by pre-integrating a plurality of hollow plate materials by bolting or the like. Alternatively, in yet another embodiment, the protective plate 62 may be composed of a single member having a hollow structure.

[0035] As shown in Figure 4, the upper wall 64 of the protective plate 62 is provided with a plurality of through holes 64a. One fastener 70 is positioned in each of the plurality of through holes 64a. Each fastener 70 is located in the internal space IS. More specifically, the lower end of each fastener 70 is located within the internal space IS. The upper end of each fastener passes through the lower cover 48 of the battery pack 20 and reaches the third inner wall 60c inside the battery pack case 44. Therefore, the upper wall 64 of the protective plate 62 is fixed to the lower cover 48 of the battery pack 20 by the plurality of fasteners 70 fastened to the third inner wall 60c. However, the plurality of fasteners 70 do not necessarily have to be fastened to the third inner wall 60c. For example, the plurality of fasteners 70 may be fastened to the first inner wall 60a or the second inner wall 60b instead of the third inner wall 60c. Although not particularly limited, the fasteners are bolts.

[0036] As shown in Figure 4, the lower wall 66 of the protective plate 62 has a plurality of openings 66a. The plurality of openings 66a are provided at positions opposite to the plurality of fasteners 70. The diameter of each opening 66a is such that the fasteners 70 can pass through the opening 66a. For example, when the fasteners 70 are bolts, the diameter of each opening 66a is larger than the diameter of the bolt head. This allows each fastener 70 to pass through the corresponding opening 66a when fixing the protective plate 62 to the lower cover 48.

[0037] In the vehicle 10 described above, the upper wall 64 of the hollow protective plate 62 is fixed to the lower surface of the battery pack 20 (i.e., the lower cover 48) by a plurality of fasteners 70 located in its internal space IS. With this configuration, each of the multiple fasteners 70 is at least partially positioned within the internal space IS of the protective plate 62. This prevents or suppresses the multiple fasteners 70 that fix the protective plate 62 from protruding downward from the protective plate 62 when the protective plate 62 is attached to the lower surface of the battery pack 20. As a result, unintended contact between the fasteners 70 and the road surface RS and their impact on the aerodynamic characteristics of the vehicle 10 can be avoided or suppressed (see Figure 6). Furthermore, the lower wall 66 of the protective plate 62 in this technology is provided with openings 66a at each position facing the multiple fasteners 70. Therefore, each fastener 70 located within the internal space IS of the protective plate 62 can be easily tightened through these openings 66a. This allows the protective plate 62, which is a hollow structural component, to be fixed to the underside of the battery pack 20 in a single installation operation.

[0038] As an example, as shown in Figure 4, the lower end of each of the multiple fasteners 70 is positioned above the lower surface of the lower wall 66 of the protect plate 62 in the vehicle height direction. With this configuration, the multiple fasteners 70 prevent the multiple fasteners 70 from protruding downward from the protect plate 62 when the protect plate 62 is attached to the lower cover 48 of the battery pack 20.

[0039] As an example, as shown in Figures 2 and 4, a gap CL is provided between the protective plate 62 and the lower cover 48 of the battery pack 20 in the vehicle height direction. With this configuration, it is possible to avoid or suppress the transmission of loads applied to the protective plate 62 from below in the vehicle height direction to the lower cover 48 (see Figure 6). Although not particularly limited, as shown in Figures 4 and 6, a spacer 72 may be provided between the protective plate 62 and the lower cover 48 to secure the gap CL. In this case, the gap CL may be filled with a fibrous insulation material, a foamed insulation material, or the like.

[0040] Although several specific examples have been described in detail above, these are merely illustrative and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes to the specific examples illustrated above. The technical elements described in this specification or in the drawings exhibit technical usefulness individually or in combination. [Explanation of symbols]

[0041] 10: Vehicles 12: Vehicle body 12c: Cabin 14f: Front wheel 14r: Rear wheel 16: Motor 18: Power control unit 20: Battery pack 22: Floor Panel 24: Rocka 26: Floor crossbeam 28: Energy absorbers 30: Inner end part 32: Middle part 34:Outer end part 36, 38: Bolt 40:Protrusion 42: Secondary battery cell 44: Battery pack case 46: Upper cover 48: Lower cover 50: Upper lower cover 52: Lower cover 54: Front Wall 56: Rear Wall 58: Sidewall 58a: Bracket 60a: First inner wall 60b: 2nd inner wall 60c: 3rd inner wall 62: Protect Plate 64: Upper wall 64a: Through hole 66: Lower wall 66a: Opening 68: Vertical wall 70: Fasteners 72: Spacer CL: Gap IS: interior space RS: Road surface

Claims

1. A vehicle body with a floor panel, A battery pack located below the floor panel in the vehicle height direction, A protective plate attached to the bottom surface of the aforementioned battery pack, Equipped with, The protective plate is a integrally molded member, and is a hollow member having a plurality of internal spaces between a pair of upper and lower walls. The upper wall of the protective plate is fixed to the lower surface of the battery pack by a plurality of fasteners located in the plurality of internal spaces. The lower wall of the protective plate is provided with openings at positions facing the plurality of fasteners. vehicle.

2. The aforementioned battery pack has at least one skeletal member inside it, The vehicle according to claim 1, wherein the plurality of fasteners are fastened to at least one of the skeletal members.

3. The vehicle according to claim 1 or 2, wherein each of the plurality of internal spaces of the protective plate extends in a constant cross-sectional shape along the width or length of the vehicle.

4. The protective plate comprises a plurality of vertical walls connecting the upper wall and the lower wall, The vehicle according to claim 1 or 2, wherein each of the plurality of vertical walls is integrally molded with the upper wall and the lower wall.

5. The vehicle according to claim 1 or 2, wherein the lower end of each of the plurality of fasteners is located above the lower surface of the lower wall of the protective plate in the vehicle height direction.

6. The vehicle according to claim 1 or 2, wherein a gap is provided between the protective plate and the lower surface of the battery pack in the vehicle height direction.

7. The battery pack has a lower plate that constitutes the lower surface of the battery pack, The vehicle according to claim 1 or 2, wherein the lower plate is provided with a cooling path for circulating coolant.

8. The vehicle according to claim 1 or 2, wherein the protective plate is made of metal.

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