Vehicle

Abstract

To provide a power storage device which can ease an impact applied from below.SOLUTION: A vehicle 900 comprises a vehicle body 910, a power storage device 1, and a share panel 230. The power storage device 1 includes a power storage module 100 and a lower case 220 supporting the power storage module 100. The lower case 220 includes a protrusion part 224 that protrudes downward toward the share panel 230. The share panel 230 includes a protrusion part 233 that protrudes upward toward the lower case 220.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to vehicles. [Background technology]

[0002] Japanese Patent Application Laid-Open Publication No. 2021-138228 (Patent Document 1) discloses a vehicle equipped with a battery case. The vehicle includes a protective member disposed on the outer side of the battery case in the vehicle width direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-138228 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, while the protective member reduces impacts to the battery case from the side, there is room for improvement in reducing impacts from below.

[0005] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide a vehicle that is capable of absorbing impacts from below. [Means for solving the problem]

[0006] A vehicle according to one aspect of the present disclosure includes a vehicle body, an electric power storage device fixed to a bottom portion of the vehicle body, and a cover member that covers the electric power storage device from below. The electric power storage device includes an electric power storage module and a lower case that supports the electric power storage module. The cover member covers the lower case from below. The lower case includes at least one first protrusion that protrudes downward toward the cover member. The cover member includes at least one second protrusion that protrudes upward toward the lower case.

[0007] In a vehicle according to one aspect of the present disclosure, as described above, the lower case includes at least one first convex portion that protrudes downward toward the cover member, and the cover member includes at least one second convex portion that protrudes upward toward the lower case. This allows both the first convex portion and the second convex portion to function as buffers from below, thereby effectively absorbing impacts from below on the power storage device.

[0008] The at least one first protrusion may include a plurality of first protrusions arranged side by side with a first space between them. The at least one second protrusion may protrude at a position overlapping the first space in the vertical direction. This configuration can prevent the plurality of first protrusions and the second protrusions from interfering with each other.

[0009] The at least one second protrusion may include a plurality of second protrusions arranged side by side with a second space between them. The at least one first protrusion may protrude at a position overlapping the second space in the vertical direction. This configuration can prevent interference between the plurality of second protrusions and the first protrusion.

[0010] At least one first protrusion may be fixed to the cover member. At least one second protrusion may be fixed to the lower case. With this configuration, the rigidity of the energy storage device can be improved compared to when the first protrusion and the cover member are separated and the second protrusion and the lower case are separated.

[0011] The power storage device may include a first buffer member provided between at least one first protrusion and the cover member, and a second buffer member provided between at least one second protrusion and the lower case. With this configuration, the first buffer member and the second buffer member can more effectively absorb impacts from below on the power storage device.

[0012] The first buffer member may be fixed to at least one of the at least one first protrusion and the cover member. The second buffer member may be fixed to at least one of the at least one second protrusion and the lower case. This allows the first buffer member to be stably fixed between the first protrusion and the cover member. Also, the second buffer member can be stably fixed between the second protrusion and the lower case.

[0013] The lower case may include a case main body to which at least one first protrusion is fixed. The cover member may include a cover main body to which at least one second protrusion is fixed. The at least one first protrusion may have a first flange fixed to the case main body and a first protrusion protruding downward from the first flange toward the cover member. The at least one second protrusion may have a second flange fixed to the cover main body and a second protrusion protruding upward from the second flange toward the lower case. With this configuration, the provision of the first flange increases the rigidity of the first protrusion and makes it easy to fix the first protrusion to the case main body. Furthermore, the provision of the second flange increases the rigidity of the second protrusion and makes it easy to fix the second protrusion to the cover main body.

[0014] At least a portion of the first flange portion may overlap at least a portion of the second flange portion in the vertical direction. This configuration can prevent a space (a space where neither the first nor the second convex portion is located) from being formed between the first flange portion and the second flange portion in the direction in which the first and second convex portions are aligned. As a result, it is possible to prevent an impact from below from being transmitted to the energy storage module compared to when such a space is formed.

[0015] A lower end of the at least one first protrusion may be located lower than an upper end of the at least one second protrusion. With this configuration, the height of the power storage device in the vertical direction can be reduced.

[0016] The at least one first convex portion and the at least one second convex portion may each be provided to extend in the front-rear direction or the left-right direction of the vehicle body. With this configuration, the first convex portion and the second convex portion can absorb impacts from below on the electricity storage device over a relatively wide area of ​​the bottom of the vehicle body. [Effects of the Invention]

[0017] According to the present disclosure, it is possible to mitigate impacts from below on an electricity storage device that includes a lower case and a cover member. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a schematic diagram showing the configuration of a vehicle and a power storage device according to an embodiment; [Figure 2] 1 is a cross-sectional view showing a configuration of an electricity storage device according to an embodiment. [Figure 3] 10 is a perspective view showing a configuration of a protrusion fixed to a lower case according to an embodiment. FIG. [Figure 4] FIG. 10 is a perspective view showing a configuration of a protrusion fixed to a shear panel according to one embodiment. [Figure 5] 3 is a partially enlarged view showing a detailed configuration in the vicinity of a convex portion in FIG. 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present disclosure will be described with reference to the accompanying drawings, in which the same or corresponding elements are designated by the same reference numerals.

[0020] The X direction, Y direction, and Z direction shown in this specification are directions that are perpendicular to each other. For example, the X direction and Y direction are the front-rear direction and the left-right direction of the vehicle 900 described below, respectively. The Z direction is the up-down (vertical) direction. Note that the X direction and Y direction may also be the left-right direction and the front-rear direction of the vehicle 900, respectively.

[0021] Fig. 1 is a schematic perspective view showing the configuration of a vehicle 900 equipped with a power storage device 1 according to an embodiment of the present disclosure. For simplification, components such as tires are not shown in Fig. 1.

[0022] The vehicle 900 includes a vehicle body 910, an electricity storage device 1, and a share panel 230. The electricity storage device 1 is fixed to the vehicle body 910. Specifically, the electricity storage device 1 is fixed to an underbody 911 of the vehicle body 910. The underbody 911 has a left frame 911a and a right frame 911b. The electricity storage device 1 is fixed to each of the left frame 911a and the right frame 911b, for example, by bolting or the like. The vehicle 900 includes, for example, a plug-in hybrid electric vehicle (PHEV), a battery electric vehicle (BEV), or a fuel cell electric vehicle (FCEV). The underbody 911 and the share panel 230 are examples of a "bottom" and a "cover member," respectively, in the present disclosure.

[0023] The power storage device 1 is a device for storing electric power for driving a vehicle 900, for example. The power storage device 1 includes a plurality of power storage modules 100, a case 200, a plurality of dampers 300 (FIG. 2), and a plurality of dampers 400 (FIG. 2). The plurality of power storage modules 100 are housed in the case 200. The dampers 300 and 400 are examples of the "first buffer member" and "second buffer member" of the present disclosure, respectively.

[0024] The case 200 includes an upper cover 210 and a lower case 220. The upper cover 210 is provided to cover the power storage modules 100 from the Z1 side. The lower case 220 supports the multiple power storage modules 100 from the Z2 side.

[0025] The shear panel 230 is provided below the case 200. The shear panel 230 is provided so as to cover the case 200 (lower case 220) from below.

[0026] A support portion 220b is provided on a side surface 220a on the Y1 side of the lower case 220. The support portion 220b is fixed (fastened) to the left frame 911a. Although not shown in FIG. 1 , a support portion is provided on a side surface on the Y2 side of the lower case 220 that is fixed (fastened) to the right frame 911b. This fixes the power storage device 1 to the underbody 911. Note that the method of fixing the power storage device 1 to the underbody 911 is not limited to the above example.

[0027] The share panel 230 is provided with a plurality of protrusions 233. Details of the protrusions 233 will be described later.

[0028] 2 is a cross-sectional view showing an energy storage device 1 according to an embodiment of the present disclosure. A plurality of energy storage modules 100 are stacked in the Z direction. Each of the plurality of energy storage modules 100 includes a plurality of electrodes (such as bipolar electrodes) (not shown) stacked in the Z direction, and separators (not shown) arranged between the electrodes. Current collector plates, thermally conductive materials, and the like (not shown) are arranged between the stacked energy storage modules 100. Note that Y1 indicates the front side of the paper, and Y2 indicates the back side of the paper.

[0029] The upper cover 210 (FIG. 1) includes an upper cover main body 211 and a connecting portion 212. The connecting portion 212 constitutes the end (end surface) of the upper cover 210 on the Z2 side. The connecting portion 212 is formed, for example, in an annular shape. The upper cover main body 211 is formed so as to protrude from the inner peripheral edge of the connecting portion 212 toward the Z1 side.

[0030] Lower case 220 (FIG. 1) includes lower case main body 221, connecting portion 222, a pair of connecting portions 223, and a plurality of (three in FIG. 2) protruding portions 224. Lower case 220 is formed from a steel plate (e.g., an iron plate). Note that the plurality of protruding portions 224 may be formed from a high-tensile steel plate. Note that lower case main body 221 and protruding portion 224 are examples of a "case main body" and a "first protruding portion" of the present disclosure, respectively.

[0031] The connecting portion 222 is fastened to the connecting portion 212 of the upper cover 210 by a bolt or the like (not shown). In this way, the lower case 220 is fixed to the upper cover 210. Note that, like the connecting portion 212, the connecting portion 222 is formed in, for example, an annular shape.

[0032] The lower case main body 221 is formed to be recessed toward the Z2 side from the inner peripheral edge of the connection portion 222. As a result, an accommodation space for accommodating a plurality of power storage modules 100 is formed between the lower case main body 221 and the upper cover main body 211.

[0033] Specifically, the lower case main body 221 has a side portion 221a and a bottom portion 221b. The side portion 221a extends from the inner peripheral edge of the connection portion 222 toward the Z2 side. When viewed from the Z1 side, the side portion 221a is provided so as to surround the multiple energy storage modules 100. The bottom portion 221b is connected to a lower end of the side portion 221a. In other words, the side portion 221a extends from the outer peripheral edge of the bottom portion 221b toward the Z1 side. The bottom portion 221b extends perpendicular to the Z direction.

[0034] Each of the pair of connecting portions 223 is fastened to a connecting portion 232 (described later) of the shear panel 230 by a bolt or the like (not shown), thereby fixing the shear panel 230 to the lower case 220. One and the other of the pair of connecting portions 223 are provided on the X1 side and the X2 side of the lower case main body 221, respectively.

[0035] Each of the pair of connecting portions 223 is located below the bottom portion 221b of the lower case main body portion 221. That is, each of the pair of connecting portions 223 constitutes an end portion (end face) on the Z2 side of the lower case 220. Each of the pair of connecting portions 223 is connected to the outer circumferential edge of the connecting portion 222 by a connecting portion 225.

[0036] Each of the plurality of protrusions 224 is formed to protrude toward the Z2 side toward the share panel 230 (a bottom portion 231b described below). Each of the plurality of protrusions 224 is fixed to the lower case main body 221. Specifically, each of the plurality of protrusions 224 is fixed to the underside 221c of the bottom portion 221b of the lower case main body 221. For example, each of the plurality of protrusions 224 is fixed to the underside 221c by welding.

[0037] The shear panel 230 includes a shear panel main body 231, a pair of connecting portions 232, and a plurality of (two in FIG. 2 ) protruding portions 233. The shear panel main body 231 connects the pair of connecting portions 232 together. The shear panel 230 is formed from a steel plate (for example, an iron plate). The plurality of protruding portions 233 may be formed from a high-tensile steel plate. The shear panel main body 231 and the protruding portions 233 are examples of the "cover main body" and "second protruding portions" of the present disclosure, respectively.

[0038] Each of the pair of connecting portions 232 is fastened to a connecting portion 223 of the lower case 220 by a bolt or the like (not shown). This fixes the shear panel 230 to the lower case 220. One and the other of the pair of connecting portions 232 are provided on the X1 side and the X2 side of the shear panel main body 231, respectively.

[0039] The shear panel main body 231 is formed so as to be recessed toward the Z2 side relative to the pair of connecting portions 232. As a result, a space is formed between the lower case 220 (lower case main body 221) and the shear panel main body 231 in which the plurality of protrusions 224 and the plurality of protrusions 233 are arranged.

[0040] Specifically, the shared panel main body 231 has a pair of side portions 231a and a bottom portion 231b. One of the pair of side portions 231a extends from the end of the X1-side connecting portion 232 on the shared panel main body 231 side toward the Z2 side. The other of the pair of side portions 231a extends from the end of the X2-side connecting portion 232 on the shared panel main body 231 side toward the Z2 side. The bottom portion 231b connects the lower ends of the pair of side portions 231a together. The bottom portion 231b extends perpendicular to the Z direction.

[0041] In conventional power storage devices, a protective member or the like is used to absorb impacts from the side of the power storage device (power storage module), but there is room for improvement in absorbing impacts from below.

[0042] In this embodiment, each of the plurality of protrusions 233 is formed to protrude toward the Z1 side toward the lower case 220 (bottom 221b). That is, between the lower case 220 and the share panel 230, the protrusions 224 and 233 are provided, with the protrusion directions being opposite to each other.

[0043] Each of the multiple protrusions 233 is fixed to the share panel main body 231. Specifically, each of the multiple protrusions 233 is fixed to the upper surface 231c of the bottom 231b of the share panel main body 231. For example, each of the multiple protrusions 233 is fixed to the upper surface 231c by welding.

[0044] The multiple protrusions 224 are arranged side by side in the X direction with a space S1 between them. The multiple protrusions 233 are arranged side by side in the X direction with a space S2 between them. Note that the space S1 and the space S2 are examples of the "first space" and the "second space" of the present disclosure, respectively.

[0045] Each of the plurality of protrusions 233 protrudes at a position overlapping with the space S1 in the Z direction. Specifically, a protrusion 233b (described later) of each of the plurality of protrusions 233 extends into the space S1 from the Z2 side.

[0046] Of the three protrusions 224, the central protrusion 224 in the X direction protrudes at a position overlapping with the space S2 in the Z direction. Specifically, a protrusion 224b (described later) of the central protrusion 224 extends into the space S2 from the Z1 side.

[0047] Each of the plurality of dampers 300 is disposed between the convex portion 224 and the shear panel 230 (bottom portion 231b). That is, the damper 300 is disposed between each of the plurality of convex portions 224 and the shear panel 230 (bottom portion 231b).

[0048] Each of the dampers 400 is disposed between the protrusion 233 and the lower case 220 (bottom 221b). That is, the damper 400 is disposed between each of the protrusions 233 and the lower case 220 (bottom 221b).

[0049] 3 is a perspective view showing the detailed configuration of the protrusion 224 and the damper 300. The protrusion 224 is formed so as to extend in the Y direction. In other words, the protrusion 224 is provided so as to extend in the left-right direction of the vehicle 900.

[0050] As shown in Fig. 2, the protrusion 224 has a hat-shaped cross section along the X direction. Specifically, the protrusion 224 has a pair of flanges 224a and a protruding portion 224b. The protruding portion 224b is formed integrally (continuously) with each of the pair of flanges 224a. The flanges 224a and the protruding portion 224b are examples of the "first flange portion" and the "first protruding portion" of the present disclosure, respectively.

[0051] Each of the pair of flange portions 224a is fixed to the lower surface 221c of the lower case main body portion 221. Each of the pair of flange portions 224a has a flat plate shape extending along the lower surface 221c. That is, each of the pair of flange portions 224a extends perpendicular to the Z direction.

[0052] The protrusion 224b protrudes from the pair of flange portions 224a toward the Z2 side of the shear panel 230 (FIG. 1). The protrusion 224b is disposed between the pair of flange portions 224a in the X direction and is connected to each of the pair of flange portions 224a. Specifically, one of the pair of flange portions 224a is connected to the X1-side end of the protrusion 224b. The other of the pair of flange portions 224a is connected to the X2-side end of the protrusion 224b.

[0053] The protruding portion 224b has a pair of inclined portions 224c and a lower end portion 224d. One of the pair of inclined portions 224c extends from the X2-side end portion of the X1-side flange portion 224a to the Z2 side. The other of the pair of inclined portions 224c extends from the X1-side end portion of the X2-side flange portion 224a to the Z2 side. The lower end portion 224d is an example of the "lower end of the first protrusion" of the present disclosure.

[0054] The lower end portion 224d is provided at the lower end of the protruding portion 224b. Specifically, the lower end portion 224d connects the lower ends of the pair of inclined portions 224c to each other.

[0055] The lower end portion 224d extends perpendicular to the Z direction. Each of the pair of inclined portions 224c extends so as to intersect with the Z direction without being perpendicular to it. The lower end portion 224d is disposed at a position that does not overlap with the pair of flange portions 224a (and the pair of inclined portions 224c) when viewed from the Z2 side.

[0056] The damper 300 is fixed to the lower end 224d from the Z2 side. That is, the damper 300 is provided between the lower end 224d and the share panel 230 (bottom 231b (FIG. 2)).

[0057] The damper 300 extends in the Y direction along the protrusion 224 (lower end 224d). The width W1 of the damper 300 in the X direction is smaller than the width W2 of the lower end 224d in the X direction.

[0058] The width W3 of the protrusion 224b in the X direction gradually decreases toward the Z2 side. The cross section of the protrusion 224b in the X direction (FIG. 2) has a trapezoidal shape. The minimum value of the width W3 is equal to the width W2 of the bottom end 224d.

[0059] 4 is a perspective view showing the detailed configuration of the protrusion 233 and the damper 400. The protrusion 233 has the same shape (configuration) as the protrusion 224. The protrusion 233 is formed so as to extend in the Y direction. In other words, the protrusion 233 is provided so as to extend in the left-right direction of the vehicle 900.

[0060] The convex portion 233 has a pair of flange portions 233a and a protruding portion 233b. The protruding portion 233b is formed integrally (continuously) with each of the pair of flange portions 233a. The flange portions 233a and the protruding portions 233b are examples of the "second flange portion" and the "second protruding portion" of the present disclosure, respectively.

[0061] Each of the pair of flange portions 233a is fixed to the upper surface 231c of the share panel main body 231. Each of the pair of flange portions 233a has a flat plate shape extending along the lower surface 221c. That is, each of the pair of flange portions 233a extends perpendicular to the Z direction.

[0062] The protruding portion 233b protrudes from the pair of flange portions 233a toward the Z1 side of the lower case 220 (FIG. 1). The protruding portion 233b is disposed between the pair of flange portions 233a in the X direction and is connected to each of the pair of flange portions 233a. Specifically, one of the pair of flange portions 233a is connected to the X1-side end of the protruding portion 233b. The other of the pair of flange portions 233a is connected to the X2-side end of the protruding portion 233b.

[0063] The protruding portion 233b has a pair of inclined portions 233c and an upper end portion 233d. One of the pair of inclined portions 233c extends from the X2-side end portion of the X1-side flange portion 233a to the Z1 side. The other of the pair of inclined portions 233c extends from the X1-side end portion of the X2-side flange portion 233a to the Z1 side. The upper end portion 233d is an example of the "upper end of the second protrusion" of the present disclosure.

[0064] The upper end 233d is provided at the upper end of the protruding portion 233b. Specifically, the upper end 233d connects the upper ends of the pair of inclined portions 233c to each other.

[0065] The upper end portion 233d extends perpendicular to the Z direction. Each of the pair of inclined portions 233c extends so as to intersect with the Z direction without being perpendicular to the Z direction. The upper end portion 233d is disposed at a position that does not overlap with the pair of flange portions 233a (and the pair of inclined portions 233c) when viewed from the Z1 side.

[0066] The damper 400 is fixed to the upper end portion 233d from the Z1 side. That is, the damper 400 is provided between the upper end portion 233d and the lower case 220 (bottom portion 221b).

[0067] The damper 400 extends in the Y direction along the convex portion 233 (upper end portion 233d). The width W4 of the damper 400 in the X direction is smaller than the width W5 of the upper end portion 233d in the X direction.

[0068] The width W6 of the protrusion 233b in the X direction gradually decreases toward the Z1 side. The cross section of the protrusion 233b in the X direction (FIG. 2) has a trapezoidal shape. The minimum value of the width W6 is equal to the width W5 of the upper end 233d.

[0069] Fig. 5 is a partially enlarged view of Fig. 2. The damper 300 has a buffer layer 310, an adhesive layer 320, and an adhesive layer 330.

[0070] The buffer layer 310 is made of a foam material such as sponge. The hardness of the damper 300 can be adjusted by adjusting the foaming rate of the buffer layer 310. For example, if it is important to prevent abnormal noise from the damper 300, the buffer layer 310 is made relatively soft. On the other hand, if it is important to improve the rigidity of the damper 300, the buffer layer 310 is made relatively hard.

[0071] The adhesive layer 320 is formed on the upper surface of the buffer layer 310. As a result, the damper 300 (buffer layer 310) is fixed to the convex portion 224 (lower end portion 224d) by the adhesive layer 320.

[0072] The adhesive layer 330 is formed on the lower surface of the buffer layer 310. As a result, the damper 300 (buffer layer 310) is fixed to the shear panel 230 by the adhesive layer 330. Therefore, the protrusion 224 (lower end 224d) is fixed to the shear panel 230.

[0073] Each of adhesive layer 320 and adhesive layer 330 may be formed from an adhesive material or from adhesive tape (double-sided tape). Furthermore, at least one of adhesive layer 320 and adhesive layer 330 may be configured to be peelable so that the shear panel 230 can be removed from the lower case 220 during maintenance or the like. For example, at least one of adhesive layer 320 and adhesive layer 330 may be formed relatively thin.

[0074] The damper 400 has the same configuration as the damper 300. The damper 400 has a buffer layer 410, an adhesive layer 420, and an adhesive layer 430.

[0075] The buffer layer 410 is made of a foam material such as sponge. The adhesive layer 420 is formed on the lower surface of the buffer layer 410. As a result, the damper 400 (buffer layer 410) is fixed to the convex portion 233 (upper end portion 233d) by the adhesive layer 420.

[0076] The adhesive layer 430 is formed on the upper surface of the buffer layer 410. As a result, the damper 400 (buffer layer 410) is fixed to the lower case 220 by the adhesive layer 430. Therefore, the convex portion 233 (upper end portion 233d) is fixed to the lower case 220. Furthermore, at least one of the adhesive layer 420 and the adhesive layer 430 may be configured to be peelable so that the shear panel 230 can be removed from the lower case 220 during maintenance or the like. For example, at least one of the adhesive layer 420 and the adhesive layer 430 may be formed to be relatively thin.

[0077] The protrusion 224 has a height h1 in the Z direction. The damper 300 has a thickness t1 (for example, several mm) in the Z direction. The height h1 is greater than the thickness t1. The sum of the height h1 and the thickness t1 is equal to the distance D1 between the bottom 221b of the lower case 220 and the bottom 231b of the share panel 230.

[0078] The protrusion 233 has a height h2 in the Z direction. The damper 400 has a thickness t2 (for example, several mm) in the Z direction. The height h2 is greater than the thickness t2. The height h2 is equal to the height h1 of the protrusion 224. The thickness t2 is equal to the thickness t1 of the damper 300.

[0079] The lower end 224d of the protrusion 224 is located closer to the Z2 side than the upper end 233d of the protrusion 233. Specifically, the lower end 224d (the lower surface) and the upper end 233d (the upper surface) are spaced apart in the Z direction by a distance D2. The distance D2 is greater than half the distance D1 between the bottom 221b of the lower case 220 and the bottom 231b of the share panel 230.

[0080] A portion of the flange portion 224a of the protrusion 224 overlaps a portion of the flange portion 233a of the protrusion 233 in the Z direction. The flange portion 224a includes an overlapping portion 224e that overlaps with the flange portion 233a in the Z direction. Note that in the protrusion 224 sandwiched between the protrusions 233 in the X direction, the overlapping portion 224e is provided on each of the pair of flange portions 224a. On the other hand, in the other protrusions 224, the overlapping portion 224e is provided only on the flange portion 224a on one side in the X direction (the protrusion 233 side).

[0081] Furthermore, the flange portion 233a includes an overlapping portion 233e that overlaps with the flange portion 224a in the Z direction. The overlapping portion 233e is provided on each of the pair of flange portions 233a.

[0082] Each of the overlapping portions 224e and 233e has a width W11 in the X direction. The width W11 is greater than half the width W12 of the flange portion 224a in the X direction (the width W13 of the flange portion 233a in the X direction). The widths W12 and W13 are equal.

[0083] Each of the pair of flange portions 224a does not overlap in the Z direction with the protruding portion 233b (FIG. 4) of the convex portion 233. This makes it possible to prevent the gap in the Z direction between the convex portion 224 and the convex portion 233 from becoming excessively small, which would be caused by the flange portion 224a and the protruding portion 233b overlapping in the Z direction.

[0084] Each of the pair of flange portions 233a does not overlap in the Z direction with the protruding portion 224b (FIG. 3) of the convex portion 224. This makes it possible to prevent the gap in the Z direction between the convex portion 224 and the convex portion 233 from becoming excessively small, which would be caused by the flange portion 233a and the protruding portion 224b overlapping in the Z direction.

[0085] As can be seen from the above, the protruding portion 224b of the convex portion 224 (FIG. 3) and the protruding portion 233b of the convex portion 233 (FIG. 4) do not overlap in the Z direction, and are shifted in position from each other in the X direction.

[0086] As described above, in this embodiment, the lower case 220 includes a (convex) protruding portion 224 that protrudes (is convex) on the Z2 side toward the shared panel 230. The shared panel 230 includes a (convex) protruding portion 233 that protrudes (is convex) on the Z1 side toward the lower case 220. As a result, each of the protruding portion 224 and the protruding portion 233 functions as a buffer member against impacts from below, and impacts from below can be more effectively absorbed than in a case where either the protruding portion 224 or the protruding portion 233 is not provided. As a result, it is possible to suppress transmission of impacts to the energy storage module 100.

[0087] In the above embodiment, the protrusion 233 is disposed at a position that overlaps in the Z direction with the space S1 between the protrusions 224 aligned in the X direction, but the present disclosure is not limited to this. The protrusions 224 and the protrusions 233 may be disposed in the same region when viewed from the Z direction.

[0088] In the above embodiment, an example was shown in which a plurality of protrusions 224 and a plurality of protrusions 233 are provided, but the present disclosure is not limited to this. The number of at least one of the protrusions 224 and the protrusions 233 may be one.

[0089] In the above embodiment, an example has been described in which the damper 300 is adhered (fixed) to both the protrusion 224 and the shear panel 230, but the present disclosure is not limited to this. The damper 300 may be adhered (fixed) to only one of the protrusion 224 and the shear panel 230. Similarly, the damper 400 may be adhered (fixed) to only one of the protrusion 233 and the lower case 220.

[0090] In the above embodiment, an example has been shown in which the protrusion 224 is fixed to the shear panel 230 by the damper 300, but the present disclosure is not limited to this. The protrusion 224 may also be fixed directly to the shear panel 230 without using the damper 300. For example, the protrusion 224 may be directly joined to the shear panel 230 with an adhesive, or the protrusion 224 may be welded to the shear panel 230. Similarly, the protrusion 233 may be fixed directly to the lower case 220 without using the damper 400.

[0091] In the above embodiment, an example was shown in which a pair of flange portions 224a were provided on each of the X1 side and the X2 side of protrusion portion 224b, but the present disclosure is not limited to this. The protrusion provided on lower case 220 may have a protrusion and an annular flange provided so as to surround the protrusion. The protrusion provided on share panel 230 may also be configured in a similar manner.

[0092] In the above embodiment, an example has been shown in which a portion of flange portion 224a and a portion of flange portion 233a overlap in the Z direction, but the present disclosure is not limited to this. Either flange portion 224a or flange portion 233a may entirely overlap the other of flange portion 224a and flange portion 233a in the Z direction.

[0093] Although an example has been shown in which each of the protrusions 224 and 233 extends in the left-right direction of the vehicle 900, the present disclosure is not limited to this. Each of the protrusions 224 and 233 may extend in the front-rear direction of the vehicle 900. Furthermore, the extending direction of the protrusions 233 and the extending direction of the protrusions 224 may intersect.

[0094] At least one of the protrusions 224 and 233 may be divided into multiple pieces in the direction in which it extends. In this case, the damper 300 (400) may also be divided into multiple pieces. Also, multiple dampers may be arranged side by side on a single protrusion. In this case, it is preferable that the dampers be provided at least on both ends and in the center of the protrusion in the direction in which the protrusion extends.

[0095] In the above embodiment, an example was shown in which the height h1 of the convex portion 224 and the height h2 of the convex portion 233 were equal, but the present disclosure is not limited to this. The height h1 and the height h2 may be different.

[0096] In the above embodiment, an example was shown in which the protrusion 224 was a separate member from the lower case main body 221, but the present disclosure is not limited to this. The protrusion 224 may be formed integrally with the lower case main body 221. For example, the protrusion may be formed by deforming the lower case main body. Similarly, the protrusion 233 may be formed integrally with the share panel main body 231. For example, the protrusion may be formed by deforming the share panel main body.

[0097] In the above embodiment, an example was shown in which the cross section along the X direction of each of the protrusions 224 and 233 has a hat shape, but the present disclosure is not limited to this. For example, the cross section along the X direction of at least one of the protrusions 224 and 233 may have a rectangular shape, or a recess may be formed in a part of the protrusion.

[0098] In the above embodiment, an example was shown in which each of the pair of flange portions 224a does not overlap with the protruding portion 233b of the convex portion 233 in the Z direction, but the present disclosure is not limited to this. The flange portion 224a may overlap with the protruding portion 233b in the Z direction. Similarly, the flange portion 233a may overlap with the protruding portion 224b of the convex portion 224 in the Z direction.

[0099] The configurations of the above-described embodiment and the various modified examples may be combined with each other.

[0100] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is defined by the claims, not by the description of the above embodiments, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0101] 1 Energy storage device, 100 Energy storage module, 200 Case, 210 Upper cover, 220 Lower case, 221 Lower case main body (case main body), 230 Share panel, 231 Share panel main body (cover main body), 224 Convex portion (first convex portion), 224a Flange portion (first flange portion), 224b Protruding portion (first protruding portion), 224d Lower end portion (lower end of first convex portion), 233 Convex portion (second convex portion), 233a Flange portion (second flange portion), 233b Protruding portion (second protruding portion), 233d Upper end portion (upper end of second convex portion), 300 Damper (first buffer member), 400 Damper (second buffer member), 900 Vehicle, 910 Vehicle body, 911 Underbody (bottom), S1 space (first space), S2 space (second space).

Claims

1. The car body and an electricity storage device fixed to the bottom of the vehicle body; a cover member that covers the electricity storage device from below, The power storage device is a power storage module; a lower case supporting the power storage module, the cover member covers the lower case from below, the lower case includes at least one first protrusion that protrudes downward toward the cover member, The cover member includes at least one second protrusion protruding upward toward the lower case.

2. the at least one first protrusion includes a plurality of first protrusions arranged side by side with a first space between them, The vehicle according to claim 1 , wherein the at least one second protrusion protrudes at a position overlapping the first space in the vertical direction.

3. the at least one second protrusion includes a plurality of second protrusions arranged side by side with a second space between them, The vehicle according to claim 1 or 2, wherein the at least one first protrusion protrudes at a position overlapping the second space in the vertical direction.

4. the at least one first protrusion is fixed to the cover member, The vehicle according to claim 1 or 2, wherein the at least one second protrusion is fixed to the lower case.

5. a first buffer member provided between the at least one first protrusion and the cover member; The vehicle according to claim 1 or 2, further comprising: a second buffer member provided between the at least one second protrusion and the lower case.

6. the first buffer member is fixed to at least one of the at least one first protrusion and the cover member, The vehicle according to claim 5 , wherein the second buffer member is fixed to at least one of the at least one second protrusion and the lower case.

7. the lower case includes a case main body to which the at least one first protrusion is fixed, the cover member includes a cover main body portion to which the at least one second protrusion portion is fixed, The at least one first protrusion is a first flange portion fixed to the case main body portion; a first protrusion protruding downward from the first flange portion toward the cover member, The at least one second protrusion is a second flange portion fixed to the cover body portion; The vehicle according to claim 1 or 2, further comprising: a second protruding portion that protrudes upward from the second flange portion toward the lower case.

8. The vehicle according to claim 7 , wherein at least a portion of the first flange portion overlaps at least a portion of the second flange portion in the vertical direction.

9. The vehicle according to claim 1 or 2, wherein a lower end of the at least one first protrusion is positioned lower than an upper end of the at least one second protrusion.

10. The vehicle according to claim 1 or 2, wherein each of the at least one first protrusion and the at least one second protrusion is provided so as to extend in a front-rear direction or a left-right direction of the vehicle body.

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