Power storage device and vehicle including the same

Abstract

The invention relates to an electricity storage device and a vehicle provided with the electricity storage device. The electricity storage device of the invention is configured below a floor panel of the vehicle. This electricity storage device is provided with: at least one electricity storage cell; a housing case including an upper case for housing at least one storage cell; the binding material is arranged on the upper surface of the at least one power storage battery cell and is used for binding the at least one power storage battery cell to the upper shell; and at least one buffer member disposed between the upper case and the floor panel and disposed above the adhesive material.

Description

Technical Field

[0001] The present disclosure relates to a power storage device and a vehicle including the power storage device. Background Art

[0002] In the power storage device (battery pack) disclosed in Japanese Patent Application Laid-Open No. 2019-197622, ​​a battery stack including a plurality of power storage cells (battery cells) is restrained by a metal restraint band.

[0003] In addition, in some power storage devices, the storage cells are fixed by adhesive material instead of by restraint tape. In such power storage devices, it is desired to reduce the amount of adhesive material used while fixing the storage cells. Summary of the Invention

[0004] One of the objectives of the present disclosure is to reduce the amount of adhesive material used while fixing a storage cell.

[0005] According to one aspect of the present disclosure, a power storage device is disposed beneath a vehicle floor panel. The power storage device includes: at least one power storage cell; a housing housing the at least one power storage cell and including an upper housing; an adhesive material disposed on the at least one power storage cell to bond the at least one power storage cell to the upper housing; and at least one buffer member disposed between the upper housing and the floor panel and above the adhesive material.

[0006] Preferably, the at least one storage cell comprises a plurality of storage cells. Each of the plurality of storage cells is arranged to extend in the front-to-rear direction of the vehicle. The plurality of storage cells are arranged along the width direction of the vehicle. The at least one buffer component comprises a plurality of buffer components. The plurality of buffer components are arranged at intervals in the front-to-rear direction of the vehicle. Each of the plurality of buffer components is formed to extend in the width direction of the vehicle.

[0007] Preferably, the at least one storage cell comprises a plurality of storage cells. Each of the plurality of storage cells is arranged to extend in the width direction of the vehicle. The plurality of storage cells are arranged in the front-to-rear direction of the vehicle. The at least one buffer component comprises a plurality of buffer components. The plurality of buffer components are arranged at intervals in the front-to-rear direction of the vehicle. Each of the plurality of buffer components is formed to extend in the width direction of the vehicle.

[0008] According to another aspect of the present disclosure, a vehicle includes the above-described power storage device. A protrusion protruding downward is formed on the floor panel. One of the at least one buffer member is disposed below the protrusion.

[0009] According to the present disclosure, it is possible to reduce the amount of adhesive material used while fixing the storage cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which like reference numerals represent like elements, wherein:

[0011] Figure 1 It is a side view schematically showing a vehicle including the power storage device according to the first embodiment.

[0012] Figure 2 It is an exploded perspective view schematically showing the power storage device 2 and the vehicle frame 3 .

[0013] Figure 3 It is a perspective view schematically showing the power storage device 2 .

[0014] Figure 4 1 is a diagram showing an example of the storage cell 10 .

[0015] Figure 5 It is a first cross-sectional view schematically showing the floor panel 4 and the power storage device 2 .

[0016] Figure 6 It is a second cross-sectional view schematically showing the floor panel 4 and the power storage device 2 .

[0017] Figure 7 It is a perspective view schematically showing a power storage device according to the second embodiment.

[0018] Figure 8 It is a cross-sectional view schematically showing the floor panel 4 and the power storage device 2A. DETAILED DESCRIPTION

[0019] The following will describe embodiments and variations of the present disclosure with reference to the accompanying drawings. In the following description, identical parts and components are represented by identical symbols, and their names and functions are also identical. Therefore, detailed descriptions will not be repeated. In addition, the embodiments and variations described below may be selectively combined as appropriate.

[0020] [Implementation Method 1]

[0021] Reference Figures 1 to 6 , a power storage device according to Embodiment 1 and a vehicle including the power storage device will be described. Figure 1 1 is a side view schematically showing a vehicle equipped with the power storage device according to the first embodiment. Figure 1 The power storage device 2 according to the first embodiment is disposed below the floor panel of a vehicle 1. Examples of the vehicle 1 include hybrid vehicles, plug-in hybrid vehicles, fuel cell vehicles, and electric vehicles. The vehicle 1 includes the power storage device 2 and a vehicle frame 3.

[0022] Figure 22 is an exploded perspective view schematically showing the power storage device 2 and the vehicle frame 3. Figure 2 The vehicle frame 3 includes a left roof rail 30 , a right roof rail 31 , a left frame 32 , a right frame 33 , a first left pillar 34 , a second left pillar 35 , a third left pillar 36 , a first right pillar 37 , a second right pillar 38 and a third right pillar 39 .

[0023] The left roof rail 30 and the right roof rail 31 are arranged above the vehicle frame 3. The left roof rail 30 and the right roof rail 31 are arranged above the vehicle frame 3. Figure 1 ) are arranged at intervals in the width direction D2 of the vehicle 1. In addition, the left roof rail 30 and the right roof rail 31 are arranged to extend in the front-rear direction D1 of the vehicle 1. The direction D3 indicates the height direction of the vehicle 1.

[0024] The left frame 32 and the right frame 33 are arranged at the bottom of the vehicle frame 3. The left frame 32 and the right frame 33 are arranged spaced apart in the width direction D2 of the vehicle 1. The left frame 32 and the right frame 33 are arranged to extend in the front-rear direction D1 of the vehicle 1.

[0025] The first left pillar 34, the second left pillar 35, and the third left pillar 36 are arranged on the left side of the vehicle frame 3. The first left pillar 34 is provided to connect the front end of the left frame 32 and the front end of the left roof rail 30. The second left pillar 35 is provided to connect the center portion of the left frame 32 and the center portion of the left roof rail 30. The third left pillar 36 is provided to connect the rear end of the left frame 32 and the rear portion of the left roof rail 30. In other words, the second left pillar 35 is arranged at a distance behind the first left pillar 34, and the third left pillar 36 is arranged at a distance behind the second left pillar 35.

[0026] The first right pillar 37, the second right pillar 38, and the third right pillar 39 are arranged on the right side of the vehicle frame 3. The first right pillar 37 is provided to connect the front end of the right frame 33 and the front end of the right roof rail 31. The second right pillar 38 is provided to connect the center portion of the right frame 33 and the center portion of the right roof rail 31. The third right pillar 39 is provided to connect the rear end of the right frame 33 and the rear portion of the right roof rail 31. In other words, the second right pillar 38 is arranged at a distance to the rear of the first right pillar 37, and the third right pillar 39 is arranged at a distance to the rear of the second right pillar 38.

[0027] The floor panel 4 is provided between the left frame 32 and the right frame 33 . The power storage device 2 is arranged below the floor panel 4 and is fixed to the left frame 32 and the right frame 33 .

[0028] Figure 3 2 is a perspective view schematically showing the power storage device 2. Figure 3The power storage device 2 includes a plurality of power storage cells 10 and a housing case 20 that houses the plurality of power storage cells 10 .

[0029] The storage cell 10 is a secondary battery, typically a lithium-ion secondary battery. A lithium-ion secondary battery uses lithium as a charge carrier. In addition to conventional lithium-ion secondary batteries with liquid electrolytes, they also include so-called all-solid-state batteries that use solid electrolytes. Furthermore, the storage cell 10 is not limited to lithium-ion secondary batteries and may also be a nickel-metal hydride secondary battery or other secondary battery.

[0030] The storage cell 10 is arranged in the vehicle 1 (see Figure 1 ) extends in the front-rear direction D1 of the vehicle 1. In addition, the plurality of storage cells 10 are arranged along the width direction D2 of the vehicle 1.

[0031] The receiving case 20 includes an upper case 21 and a lower case 22 . Figure 3 2 shows the power storage device 2 with the upper case 21 removed. The lower case 22 includes a bottom plate 24, a peripheral wall 25, and a plurality of partition walls 60, 61, 62, 63, and 64. The plurality of partition walls 60, 61, 62, 63, and 64 divide the space within the housing case 20 into a plurality of spaces.

[0032] The base plate 24 is formed in a flat plate shape. The peripheral wall 25 is formed to extend from the outer peripheral edge of the base plate 24 toward the top of the vehicle 1 and is annular. The peripheral wall 25 includes a front wall 28A, a rear wall 28B, a left side wall 28C, and a right side wall 28D. The front wall 28A is located in front of the peripheral wall 25, and the rear wall 28B is located behind the peripheral wall 25. The left side wall 28C and the right side wall 28D are spaced apart in the width direction D2 of the vehicle 1. The left side wall 28C is located on the left side of the vehicle 1, and the right side wall 28D is located on the right side of the vehicle 1. Partition walls 60, 61, 62, 63, and 64 are provided on the base plate 24. The partition walls 60, 61, 62, and 63 are formed to extend in the front-to-rear direction D1 of the vehicle 1, and the partition wall 64 is formed to extend in the width direction D2 of the vehicle 1. The partition wall 64 is located in the center of the vehicle 1 in the front-to-rear direction D1. Partition wall 60 and partition wall 63 are arranged at the center of vehicle 1 in width direction D2. Partition wall 60 is arranged closer to the front of vehicle 1 than partition wall 64, and partition wall 63 is arranged closer to the rear of vehicle 1 than partition wall 64. Multiple storage cells 10 are housed in the spaces defined by the multiple partition walls 60, 61, 62, 63, and 64.

[0033] The lower housing 22 further includes a plurality of support portions 26 and a plurality of support portions 27. The support portion 26 is provided on the outside of the left side wall 28C of the peripheral wall 25, and the support portion 27 is provided on the outside of the right side wall 28D of the peripheral wall 25. The support portions 26 and 27 are fixed to the vehicle frame 3 (see Figure 2As an example, holes for inserting bolts are provided in the support parts 26 and 27. By inserting the bolts into the holes, the plurality of support parts 26 are fixed to the left frame 32 (see Figure 2 ), multiple support parts 27 are fixed to the right frame 33 (refer to Figure 2 ).

[0034] The power storage device 2 further includes a plurality of buffer members 50. Figure 3 In the illustrated example, the power storage device 2 includes four buffer members 50. Multiple buffer members 50 are provided on the upper surface of the upper housing 21. More specifically, the multiple buffer members 50 are spaced apart in the front-to-rear direction D1 of the vehicle 1. Furthermore, each of the multiple buffer members 50 is formed to extend in the width direction D2 of the vehicle 1. When viewing the buffer members 50 and the partition walls 61 and 62 from above, each buffer member 50 extends from the partition wall 61 to the partition wall 62 in the width direction D2. Alternatively, each buffer member 50 may extend from near the left side wall 28C to near the right side wall 28D.

[0035] Figure 4 1 is a diagram showing an example of the storage cell 10. Figure 4 The storage cell 10 includes a top surface 11, a bottom surface 12, a pair of short side surfaces 13 and 14, and a pair of long side surfaces 15 and 16. The pair of short side surfaces 13 and 14 are spaced apart in the front-to-rear direction D1 of the vehicle 1. The pair of long side surfaces 15 and 16 are spaced apart in the width direction D2 of the vehicle 1. Each of the pair of long side surfaces 15 and 16 is formed to extend in the front-to-rear direction D1 of the vehicle 1.

[0036] The storage cell 10 further includes a positive terminal 17 and a negative terminal 18. The positive terminal 17 is provided on one surface of the pair of short side surfaces 13 and 14, and the negative terminal 18 is provided on the other surface of the pair of short side surfaces 13 and 14. Figure 4 In the example shown, positive electrode terminal 17 is provided on short side surface 14, and negative electrode terminal 18 is provided on short side surface 13. Alternatively, positive electrode terminal 17 and negative electrode terminal 18 may be provided on one of the pair of short side surfaces 13 and 14.

[0037] The storage cell 10 further includes a cell exhaust valve 19 for exhausting gas from the storage cell 10. The cell exhaust valve 19 is configured to exhaust the gas from the storage cell 10 to the outside of the storage cell 10 when the internal pressure of the storage cell 10 increases. The cell exhaust valve 19 is provided on the side of the storage cell 10. Figure 4 In the example shown, the cell fume exhaust valve 19 is provided on the short side surface 13 where the negative terminal 18 is provided. Alternatively, the cell fume exhaust valve 19 may be provided on the short side surface 14, the long side surface 15, or the long side surface 16.

[0038] Figure 5 It is a first cross-sectional view schematically showing the floor panel 4 and the power storage device 2 . Figure 5 FIG. 2 shows a state where the power storage device 2 is arranged below the floor panel 4. Figure 3 The cross section of the V-V line is shown in FIG.

[0039] Reference Figure 5 The power storage device 2 is disposed below the floor panel 4. More specifically, the support portion 26 is fixed to the left frame 32 by fitting the bolts 29 into holes provided in the support portion 26. Figure 5 Although not shown, similarly, the bolts are embedded in the support portion 27 (see Figure 3 ) hole, so that the support portion 27 is fixed to the right frame 33 (refer to Figure 2 ).

[0040] In the power storage device 2, the short side surface 13 faces the vehicle 1 (see Figure 1 ) and the storage cells 10 arranged with their short sides 14 facing the front of the vehicle 1 are alternately arranged along the width direction D2 of the vehicle 1.

[0041] Figure 6 It is a second cross-sectional view schematically showing the floor panel 4 and the power storage device 2 . Figure 6 FIG. 2 shows a state where the power storage device 2 is arranged below the floor panel 4. Figure 3 The cross section along line VI-VI is shown in FIG.

[0042] Reference Figure 6 The floor panel 4 is formed with a Figure 1 ) are provided with a plurality of protrusions 5 protruding from the bottom. Figure 6 In the illustrated example, four protrusions 5 are formed on the floor panel 4. The protrusions 5 are formed at intervals in the front-rear direction D1 of the vehicle 1. Furthermore, each of the protrusions 5 is formed to extend in the width direction D2 of the vehicle 1. Furthermore, the protrusions 5 are formed to be longer than the cushioning member 50 in the width direction D2.

[0043] Reference Figure 5 and Figure 6 The power storage device 2 includes an adhesive material 40 for bonding the power storage cells 10 to the upper case 21. The adhesive material 40 is made of resin. The adhesive material 40 is provided on the upper surface 11 of the power storage cells 10. More specifically, the adhesive material 40 is provided along the upper surface 11 between the upper surface 11 of the power storage cells 10 and the upper case 21. The plurality of power storage cells 10 are fixed to the upper case 21 by the adhesive material 40.

[0044] Reference Figure 6A plurality of cushioning members 50 are arranged between the upper housing 21 and the floor panel 4 at intervals in the front-rear direction D1 of the vehicle 1. More specifically, the plurality of cushioning members 50 are arranged above the adhesive material 40. Furthermore, the plurality of cushioning members 50 are arranged below the plurality of protrusions 5. Specifically, the cushioning members 50 are arranged below the protrusions 5, and the adhesive material 40 is arranged below the cushioning members 50.

[0045] Refer again Figure 5 and Figure 6 The power storage device 2 further includes a cooler 70 for cooling the power storage cell 10 . The cooler 70 is provided along the lower surface 12 of the power storage cell 10 .

[0046] The power storage device 2 further includes an insulating plate 80 . The insulating plate 80 is provided along the bottom plate 24 between the cooler 70 and the bottom plate 24 .

[0047] As described above, in the power storage device 2 according to the first embodiment, the adhesive material 40 is provided on the upper surface 11 of the storage cell 10, and the cushioning member 50 is provided above the adhesive material 40 and between the upper case 21 and the floor panel 4. As a result, the load from the floor panel 4 is applied to the cushioning member 50, so the adhesive material 40 located below the cushioning member 50 is pressed against the storage cell 10 by the load from the cushioning member 50. Therefore, even if the amount of adhesive material 40 used is reduced, it is possible to prevent the storage cell 10 from peeling off from the adhesive material 40. Therefore, according to the power storage device 2 according to the first embodiment, it is possible to secure the storage cell 10 while reducing the amount of adhesive material 40 used.

[0048] Furthermore, the floor panel 4 is provided with a plurality of protrusions 5 that protrude downwardly from the vehicle 1, and a plurality of cushioning members 50 are disposed below each of the protrusions 5. The provision of the protrusions 5 causes the cushioning members 50 to be pressed against the upper case 21 by the protrusions 5, compared to a case without the protrusions 5. Consequently, the adhesive material 40 located below the cushioning members 50 is pressed more strongly against the storage cells 10. Consequently, even when the amount of adhesive material 40 used is reduced, separation of the storage cells 10 from the adhesive material 40 can be suppressed.

[0049] Furthermore, the cushioning member 50 is formed to extend in the direction in which the plurality of storage cells 10 are arranged (the width direction D2 of the vehicle 1). Therefore, the load from the floor panel 4 can be applied to the plurality of storage cells 10. Consequently, even if the amount of adhesive 40 used is reduced, separation of the storage cells 10 from the adhesive 40 can be suppressed.

[0050] [Implementation Method 2]

[0051] Reference Figure 7 and Figure 8, the power storage device according to the second embodiment will be described. Figure 7 It is a perspective view schematically showing a power storage device according to the second embodiment.

[0052] The power storage device 2A according to the second embodiment is different from the power storage device 2 according to the first embodiment (see Figure 3 ) is similarly configured on vehicle 1 (refer to Figure 1 ) below the floor panel. The power storage device 2A according to the second embodiment differs from the power storage device 2 according to the first embodiment in the arrangement of the power storage cells 10 .

[0053] In the power storage device 2A, the power storage cells 10 are arranged to extend in the width direction D2 of the vehicle 1, and the plurality of power storage cells 10 are arranged along the front-rear direction D1 of the vehicle 1. That is, in the power storage device 2A, the pair of short side surfaces 13 and 14 (see Figure 4 ) are provided at intervals in the width direction D2 of the vehicle 1. In addition, a pair of long side surfaces 15, 16 (see Figure 4 ) are arranged at intervals in the front-rear direction D1 of the vehicle 1. In addition, each of the pair of long side surfaces 15 and 16 is formed to extend in the width direction D2 of the vehicle 1.

[0054] The power storage device 2A includes a plurality of buffer members 50 similarly to the power storage device 2. Figure 7 In the illustrated example, power storage device 2A includes four cushioning members 50. Multiple cushioning members 50 are provided on the upper surface of upper housing 21. More specifically, multiple cushioning members 50 are spaced apart in longitudinal direction D1 of vehicle 1. Furthermore, each of the multiple cushioning members 50 is formed to extend in width direction D2 of vehicle 1. Alternatively, each cushioning member 50 may be formed from near left side wall 28C to near right side wall 28D.

[0055] Figure 8 It is a cross-sectional view schematically showing the floor panel 4 and the power storage device 2A. Figure 8 FIG. 2 shows a state where the power storage device 2A is arranged below the floor panel 4. Figure 7 The cross section along line VIII-VIII is shown in FIG.

[0056] Reference Figure 8 The power storage device 2A is arranged below the floor panel 4. In the power storage device 2A, the short side surface 13 faces the vehicle 1 (see Figure 1 ) and the storage cells 10 arranged with the short side surfaces 14 facing the left side of the vehicle 1 are alternately arranged along the front-rear direction D1 of the vehicle 1.

[0057] The floor panel 4 is formed with a plurality of protrusions 5 that protrude downwardly from the vehicle 1. Figure 8 In the illustrated example, four protrusions 5 are formed on the floor panel 4. The protrusions 5 are formed at intervals in the front-rear direction D1 of the vehicle 1. Furthermore, each of the protrusions 5 is formed to extend in the width direction D2 of the vehicle 1. Furthermore, the protrusions 5 are formed to be longer than the cushioning member 50 in the width direction D2.

[0058] The power storage device 2A includes an adhesive material 40 for bonding the storage cells 10 to the upper case 21. The adhesive material 40 is made of resin. The adhesive material 40 is provided on the upper surface 11 of the storage cells 10. More specifically, the adhesive material 40 is provided along the upper surface 11 between the upper surface 11 of the storage cells 10 and the upper case 21. The plurality of storage cells 10 are fixed to the upper case 21 by the adhesive material 40.

[0059] A plurality of cushioning members 50 are arranged between the upper housing 21 and the floor panel 4 at intervals in the front-rear direction D1 of the vehicle 1. More specifically, the plurality of cushioning members 50 are arranged above the adhesive material 40. Furthermore, the plurality of cushioning members 50 are arranged below the plurality of protrusions 5. Specifically, the cushioning members 50 are provided below the protrusions 5, and the adhesive material 40 is provided below the cushioning members 50.

[0060] The power storage device 2A further includes a cooler 70 for cooling the power storage cells 10 . The cooler 70 is provided along the lower surface 12 of the power storage cells 10 .

[0061] The power storage device 2A further includes an insulating plate 80 . The insulating plate 80 is provided along the bottom plate 24 between the cooler 70 and the bottom plate 24 .

[0062] As described above, in the power storage device 2A according to the second embodiment, the adhesive material 40 is provided on the upper surface 11 of the storage cell 10, and the cushioning member 50 is provided above the adhesive material 40 and between the upper case 21 and the floor panel 4. As a result, the load from the floor panel 4 is applied to the cushioning member 50, so the adhesive material 40 located below the cushioning member 50 is pressed against the storage cell 10 by the load from the cushioning member 50. Therefore, even if the amount of adhesive material 40 used is reduced, it is possible to prevent the storage cell 10 from peeling off from the adhesive material 40. Therefore, according to the power storage device 2A according to the second embodiment, it is possible to secure the storage cell 10 while reducing the amount of adhesive material 40 used.

[0063] Furthermore, the floor panel 4 is formed with a plurality of protrusions 5 that protrude downwardly from the vehicle 1, and a plurality of cushioning members 50 are disposed below each of the protrusions 5. The presence of the protrusions 5 causes the cushioning members 50 to be pressed against the upper case 21, compared to a case without the protrusions 5. This results in the adhesive material 40 located below the cushioning members 50 being pressed more strongly against the storage cells 10. Consequently, even when the amount of adhesive material 40 used is reduced, it is possible to prevent the storage cells 10 from peeling off from the adhesive material 40.

[0064] Furthermore, the cushioning member 50 is formed to extend in the longitudinal direction of the storage cell 10 (the width direction D2 of the vehicle 1). Therefore, the load from the floor panel 4 can be applied to the storage cell 10 located below the cushioning member 50. Therefore, even if the amount of adhesive 40 used is reduced, it is possible to suppress the storage cell 10 from peeling off from the adhesive 40.

[0065] [Modification]

[0066] The power storage device 2 or 2A only needs to include at least one power storage cell 10. In addition, the power storage device 2 or 2A only needs to include at least one buffer member 50.

[0067] In the first and second embodiments described above, multiple protrusions 5 are formed on the floor panel 4. However, only one protrusion 5 may be formed on the floor panel 4. In the case where only one protrusion 5 is formed on the floor panel 4, the adhesive material 40 is provided on the upper surface 11 of the storage cell 10, and one of the at least one cushioning member 50 is positioned below the protrusion 5. Furthermore, the remaining cushioning member 50 may be positioned between the upper case 21 and the floor panel 4 above the adhesive material 40.

[0068] Alternatively, the protrusion 5 may not be formed on the floor panel 4 . In this case, the adhesive 40 is provided on the upper surface 11 of the storage cell 10 , and at least one buffer member 50 is provided between the upper case 21 and the floor panel 4 above the adhesive 40 .

[0069] The embodiments disclosed herein are examples in all respects and should not be considered restrictive. The scope of the present disclosure is defined by the claims rather than the foregoing description, and is intended to include all modifications within the meaning and scope equivalent to the claims.

Claims

1. An electric storage device arranged below a floor panel of a vehicle, wherein: have: at least one battery cell; a receiving shell, accommodating the at least one battery cell, and comprising an upper shell; an adhesive material disposed on the at least one storage cell to adhere the at least one storage cell to the upper housing; as well as At least one buffer member is disposed between the upper shell and the floor panel and above the adhesive material.

2. The power storage device according to claim 1, wherein The at least one storage cell is a plurality of storage cells. Each of the plurality of storage cells is arranged to extend in the front-rear direction of the vehicle. The plurality of storage cells are arranged along the width direction of the vehicle. The at least one buffer component is a plurality of buffer components, The plurality of buffer members are arranged at intervals in the front-rear direction of the vehicle. Each of the plurality of buffer members is formed to extend in the width direction of the vehicle.

3. The power storage device according to claim 1, wherein The at least one storage cell is a plurality of storage cells. Each of the plurality of storage cells is arranged to extend in the width direction of the vehicle, The plurality of storage cells are arranged along the front-rear direction of the vehicle. The at least one buffer component is a plurality of buffer components, The plurality of buffer members are arranged at intervals in the front-rear direction of the vehicle. Each of the plurality of buffer members is formed to extend in the width direction of the vehicle.

4. A vehicle comprising the power storage device according to any one of claims 1 to 3, wherein: The floor panel is provided with a protruding portion protruding downward. One of the at least one buffer member is disposed below the protruding portion.

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