Power storage device and vehicle equipped with power storage device

Abstract

To reduce the amount of adhesive used while the storage cells are fixed.SOLUTION: A power storage device 2 is disposed below a floor panel 4 of a vehicle. The power storage device 2 includes an accommodating case that includes at least one power storage cell 10 and an upper case 21 and accommodates the at least one power storage cell 10, an adhesive 40 that is provided on an upper surface 11 of the at least one power storage cell 10 and adheres the at least one power storage cell 10 to the upper case 21, and at least one buffer member 50 that is disposed between the upper case 21 and the floor panel 4 and above the adhesive 40.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a power storage device and a vehicle equipped with the power storage device. [Background technology]

[0002] In the electricity storage device (battery pack) disclosed in JP 2019-197622 A (Patent Document 1), a battery stack including a plurality of electricity storage cells (cells) is restrained by a metal restraint band. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-197622 Summary of the Invention [Problem to be solved by the invention]

[0004] In some energy storage devices, energy storage cells are fixed by adhesive instead of restraining bands. In such energy storage devices, there is a demand for reducing the amount of adhesive used while still fixing the energy storage cells.

[0005] An object of the present disclosure is to reduce the amount of adhesive used while fixing the energy storage cells. [Means for solving the problem]

[0006] An electric storage device according to an aspect of the present disclosure is disposed below a floor panel of a vehicle, the electric storage device including at least one electric storage cell, an upper case, a housing case that houses the at least one electric storage cell, an adhesive provided on an upper surface of the at least one electric storage cell and that adheres the at least one electric storage cell to the upper case, and at least one buffer member disposed between the upper case and the floor panel and above the adhesive.

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

[0008] Preferably, the at least one power storage cell includes a plurality of power storage cells. Each of the plurality of power storage cells is arranged to extend in the width direction of the vehicle. The plurality of power storage cells are arranged along the front-rear direction of the vehicle. The at least one buffer member includes a plurality of buffer members. 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.

[0009] A vehicle according to another aspect of the present disclosure includes the above-described power storage device. The floor panel has a protrusion that protrudes downward. One of the at least one buffer member is disposed below the protrusion. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to reduce the amount of adhesive used while fixing the energy storage cells. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a side view that schematically shows a vehicle that includes an electricity storage device according to a first embodiment. [Figure 2] 2 is an exploded perspective view schematically showing an electricity storage device 2 and a vehicle frame 3. FIG. [Figure 3] FIG. 2 is a perspective view schematically showing the electricity storage device 2. [Figure 4] FIG. 1 is a diagram illustrating an example of a storage cell 10. [Figure 5] 2 is a first cross-sectional view schematically showing a floor panel 4 and an electricity storage device 2. FIG. [Figure 6]4 is a second cross-sectional view schematically showing the floor panel 4 and the power storage device 2. FIG. [Figure 7] FIG. 10 is a perspective view schematically showing an electricity storage device according to a second embodiment. [Figure 8] 2 is a cross-sectional view schematically showing a floor panel 4 and an electricity storage device 2A. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments and modifications according to the present disclosure will be described with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated. Note that the embodiments and modifications described below may be selectively combined as appropriate.

[0013] [Embodiment 1] An electricity storage device according to a first embodiment and a vehicle including the electricity storage device will be described with reference to Figs. 1 to 6. Fig. 1 is a side view that schematically shows a vehicle including the electricity storage device according to the first embodiment. With reference to Fig. 1, an electricity storage device 2 according to the first embodiment is disposed below a floor panel of a vehicle 1. Examples of the vehicle 1 include a hybrid vehicle, a plug-in hybrid vehicle, a fuel cell vehicle, and an electric vehicle. The vehicle 1 includes the electricity storage device 2 and a vehicle frame 3.

[0014] Fig. 2 is an exploded perspective view schematically showing the power storage device 2 and the vehicle frame 3. Referring to Fig. 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.

[0015] The left roof rail 30 and the right roof rail 31 are disposed above the vehicle frame 3. The left roof rail 30 and the right roof rail 31 are disposed at an interval in the width direction D2 of the vehicle 1 (see FIG. 1). The left roof rail 30 and the right roof rail 31 are disposed so as to extend in the front-rear direction D1 of the vehicle 1. The direction D3 indicates the height direction of the vehicle 1.

[0016] The left frame 32 and the right frame 33 are disposed at the bottom of the vehicle frame 3. The left frame 32 and the right frame 33 are disposed at an interval in the width direction D2 of the vehicle 1. The left frame 32 and the right frame 33 are also disposed so as to extend in the front-rear direction D1 of the vehicle 1.

[0017] The first left pillar 34, the second left pillar 35, and the third left pillar 36 are disposed on the left side surface of the vehicle frame 3. The first left pillar 34 is disposed so as 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 disposed so as to connect the center of the left frame 32 and the center of the left roof rail 30. The third left pillar 36 is disposed so as 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 disposed rearward from the first left pillar 34 with a gap therebetween, and the third left pillar 36 is disposed rearward from the second left pillar 35 with a gap therebetween.

[0018] The first right pillar 37, the second right pillar 38, and the third right pillar 39 are disposed on the right side of the vehicle frame 3. The first right pillar 37 is disposed so as to connect the front end of the right frame 33 to the front end of the right roof rail 31. The second right pillar 38 is disposed so as to connect the center of the right frame 33 to the center of the right roof rail 31. The third right pillar 39 is disposed so as to connect the rear end of the right frame 33 to the rear portion of the right roof rail 31. In other words, the second right pillar 38 is disposed rearward from and spaced apart from the first right pillar 37, and the third right pillar 39 is disposed rearward from and spaced apart from the second right pillar 38.

[0019] A floor panel 4 is provided between the left frame 32 and the right frame 33. The power storage device 2 is disposed below the floor panel 4 and fixed to the left frame 32 and the right frame 33.

[0020] Fig. 3 is a perspective view that schematically shows the power storage device 2. Referring to Fig. 3, the 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.

[0021] The energy storage cell 10 is a secondary battery, typically a lithium-ion secondary battery. A lithium-ion secondary battery is a battery that uses lithium as a charge carrier, and may include not only a typical lithium-ion secondary battery that uses a liquid electrolyte, but also a so-called all-solid-state battery that uses a solid electrolyte. Note that the energy storage cell 10 is not limited to a lithium-ion secondary battery, and may be composed of a nickel-metal hydride secondary battery or other secondary battery.

[0022] The energy storage cells 10 are arranged to extend in a front-rear direction D1 of the vehicle 1 (see FIG. 1). The energy storage cells 10 are also arranged along a width direction D2 of the vehicle 1.

[0023] The storage case 20 includes an upper case 21 and a lower case 22. Fig. 3 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 inside the storage case 20 into a plurality of sections.

[0024] The bottom plate 24 is formed in a flat plate shape. The peripheral wall 25 is formed to extend from the outer peripheral edge of the bottom plate 24 toward the upper side of the vehicle 1, and is formed in an annular shape. 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 in rear of the peripheral wall 25. The left side wall 28C and the right side wall 28D are arranged at an interval 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 bottom plate 24. Partition walls 60, 61, 62, and 63 are formed to extend in the longitudinal direction D1 of vehicle 1, and partition wall 64 is formed to extend in the width direction D2 of vehicle 1. Partition wall 64 is arranged in the center of vehicle 1 in the longitudinal direction D1. Partition walls 60 and 63 are arranged in the center of vehicle 1 in the width direction D2. Partition wall 60 is arranged further forward of vehicle 1 than partition wall 64, and partition wall 63 is arranged further rearward of vehicle 1 than partition wall 64. A plurality of energy storage cells 10 are accommodated in each space partitioned by the plurality of partition walls 60, 61, 62, 63, and 64.

[0025] The lower case 22 further includes a plurality of support portions 26 and a plurality of support portions 27. The support portion 26 is provided on the outer surface of a left side wall 28C of the peripheral wall 25, and the support portion 27 is provided on the outer surface of a right side wall 28D of the peripheral wall 25. The support portions 26, 27 are fixed to the vehicle framework 3 (see FIG. 2). As an example, the support portions 26, 27 are provided with holes into which bolts are fitted. By fitting the bolts into the holes, the plurality of support portions 26 are fixed to the left frame 32 (see FIG. 2), and the plurality of support portions 27 are fixed to the right frame 33 (see FIG. 2).

[0026] The power storage device 2 further includes a plurality of buffer members 50. In the example shown in FIG. 3, the power storage device 2 includes four buffer members 50. The buffer members 50 are provided on the upper surface of the upper case 21. More specifically, the buffer members 50 are arranged at intervals in the front-to-rear direction D1 of the vehicle 1. Each of the buffer members 50 is formed to extend in the width direction D2 of the vehicle 1. When the buffer members 50 and the partition walls 61, 62 are viewed in a plan view from above, each buffer member 50 is formed to extend from the partition wall 61 to the partition wall 62 in the width direction D2. Note that each buffer member 50 may be formed to extend from the vicinity of the left side wall 28C to the vicinity of the right side wall 28D.

[0027] Fig. 4 is a diagram showing an example of a power storage cell 10. Referring to Fig. 4, the power storage cell 10 includes an upper surface 11, a lower surface 12, a pair of short side surfaces 13, 14, and a pair of long side surfaces 15, 16. The pair of short side surfaces 13, 14 are provided at an interval in the front-rear direction D1 of the vehicle 1. The pair of long side surfaces 15, 16 are arranged at an interval in the width direction D2 of the vehicle 1. Each of the pair of long side surfaces 15, 16 is formed to extend in the front-rear direction D1 of the vehicle 1.

[0028] The energy storage cell 10 further includes a positive electrode terminal 17 and a negative electrode terminal 18. The positive electrode terminal 17 is provided on one of the pair of short side surfaces 13, 14, and the negative electrode terminal 18 is provided on the other of the pair of short side surfaces 13, 14. In the example shown in FIG. 4 , the positive electrode terminal 17 is provided on the short side surface 14, and the negative electrode terminal 18 is provided on the short side surface 13. Note that both the positive electrode terminal 17 and the negative electrode terminal 18 may be provided on one of the pair of short side surfaces 13, 14.

[0029] The energy storage cell 10 further includes a cell smoke vent valve 19 that vents gas inside the energy storage cell 10. The cell smoke vent valve 19 is configured to vent gas inside the energy storage cell 10 to the outside of the energy storage cell 10 when the internal pressure of the energy storage cell 10 increases. The cell smoke vent valve 19 is provided on a side surface of the energy storage cell 10. In the example shown in FIG. 4 , the cell smoke vent valve 19 is provided on the short side surface 13 on which the negative electrode terminal 18 is provided. The cell smoke vent valve 19 may also be provided on the short side surface 14, the long side surface 15, or the long side surface 16.

[0030] Fig. 5 is a first cross-sectional view schematically showing the floor panel 4 and the power storage device 2. Fig. 5 shows a cross section taken along line VV shown in Fig. 3 in a state in which the power storage device 2 is disposed below the floor panel 4.

[0031] 5, power storage device 2 is disposed below floor panel 4. More specifically, bolts 29 are fitted into holes formed in support portion 26, thereby fixing support portion 26 to left frame 32. Similarly, although not shown in FIG. 5, bolts are fitted into holes formed in support portion 27 (see FIG. 3), thereby fixing support portion 27 to right frame 33 (see FIG. 2).

[0032] In the energy storage device 2, energy storage cells 10 arranged with their short sides 13 facing forward of the vehicle 1 (see FIG. 1) and energy storage cells 10 arranged with their short sides 14 facing forward of the vehicle 1 are arranged alternately along the width direction D2 of the vehicle 1.

[0033] Fig. 6 is a second cross-sectional view schematically showing the floor panel 4 and the power storage device 2. Fig. 6 shows a cross section taken along line VI-VI in Fig. 3 in a state in which the power storage device 2 is disposed below the floor panel 4.

[0034] Referring to FIG. 6, the floor panel 4 is formed with a plurality of protrusions 5 that protrude downward of the vehicle 1 (see FIG. 1). In the example shown in FIG. 6, four protrusions 5 are formed on the floor panel 4. The plurality of protrusions 5 are formed at intervals in the front-rear direction D1 of the vehicle 1. Each of the plurality of protrusions 5 is formed so as to extend in the width direction D2 of the vehicle 1. Note that in the width direction D2, the protrusions 5 are formed so as to be longer than the buffer member 50.

[0035] 5 and 6, the energy storage device 2 includes an adhesive 40 that adheres the energy storage cells 10 to the upper case 21. The adhesive 40 is made of resin. The adhesive 40 is provided on the upper surface 11 of the energy storage cells 10. More specifically, the adhesive 40 is provided between the upper surface 11 of the energy storage cells 10 and the upper case 21 and along the upper surface 11. The plurality of energy storage cells 10 are fixed to the upper case 21 by the adhesive 40.

[0036] 6, the plurality of buffer members 50 are arranged between the upper case 21 and the floor panel 4 at intervals in the front-rear direction D1 of the vehicle 1. More specifically, the plurality of buffer members 50 are arranged above the adhesive material 40. The plurality of buffer members 50 are also arranged below the plurality of protrusions 5, respectively. That is, the buffer members 50 are provided below the protrusions 5, and the adhesive material 40 is provided below the buffer members 50.

[0037] 5 and 6 again, the power storage device 2 further includes a cooler 70 that cools the power storage cells 10. The cooler 70 is provided along the lower surface 12 of the power storage cells 10.

[0038] The electricity 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.

[0039] As described above, in the energy storage device 2 according to the first embodiment, the adhesive 40 is provided on the upper surface 11 of the energy storage cell 10, and the buffer member 50 is provided above the adhesive 40 between the upper case 21 and the floor panel 4. As a result, a load from the floor panel 4 is applied to the buffer member 50, and the adhesive 40 located below the buffer member 50 is pressed against the energy storage cell 10 by the load from the buffer member 50. Therefore, even if the amount of adhesive 40 used is reduced, it is possible to prevent the energy storage cell 10 from peeling off from the adhesive 40. Therefore, according to the energy storage device 2 according to the first embodiment, it is possible to reduce the amount of adhesive 40 used while fixing the energy storage cell 10.

[0040] Furthermore, the floor panel 4 is formed with a plurality of protrusions 5 that protrude downward from the vehicle 1, and the plurality of buffer members 50 are respectively disposed below the plurality of protrusions 5. As such, because the protrusions 5 are provided, the buffer members 50 are pressed against the upper case 21 by the protrusions 5, and the adhesive 40 located below the buffer members 50 is pressed more strongly against the energy storage cells 10 than in a case where the protrusions 5 are not provided. Therefore, even if the amount of adhesive 40 used is reduced, it is possible to prevent the energy storage cells 10 from peeling off from the adhesive 40.

[0041] Furthermore, the buffer member 50 is formed to extend in the arrangement direction of the plurality of energy storage cells 10 (the width direction D2 of the vehicle 1). Therefore, the load from the floor panel 4 can be applied to the plurality of energy storage cells 10. Therefore, even if the amount of adhesive 40 used is reduced, peeling of the energy storage cells 10 from the adhesive 40 can be suppressed.

[0042] [Embodiment 2] The electricity storage device according to the second embodiment will be described with reference to Fig. 7 and Fig. 8. Fig. 7 is a perspective view schematically showing the electricity storage device according to the second embodiment.

[0043] The power storage device 2A according to the second embodiment is disposed below the floor panel of the vehicle 1 (see FIG. 1), similar to the power storage device 2 according to the first embodiment (see FIG. 3). 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.

[0044] In the power storage device 2A, the power storage cells 10 are arranged so as to extend in the width direction D2 of the vehicle 1, and the multiple power storage cells 10 are arranged along the front-rear direction D1 of the vehicle 1. That is, in the power storage device 2A, a pair of short side surfaces 13, 14 (see FIG. 4) are provided with a gap between them in the width direction D2 of the vehicle 1. Also, a pair of long side surfaces 15, 16 (see FIG. 4) are arranged with a gap between them in the front-rear direction D1 of the vehicle 1. Also, each of the pair of long side surfaces 15, 16 is formed so as to extend in the width direction D2 of the vehicle 1.

[0045] Like the power storage device 2, the power storage device 2A includes a plurality of buffer members 50. In the example shown in FIG. 7, the power storage device 2A includes four buffer members 50. The buffer members 50 are provided on the top surface of the upper case 21. More specifically, the buffer members 50 are arranged at intervals in the front-rear direction D1 of the vehicle 1. Each of the buffer members 50 is formed to extend in the width direction D2 of the vehicle 1. Each buffer member 50 may be formed to extend from the vicinity of the left side wall 28C to the vicinity of the right side wall 28D.

[0046] Fig. 8 is a cross-sectional view schematically showing floor panel 4 and power storage device 2A. Fig. 8 shows a cross section taken along line VIII-VIII shown in Fig. 7 in a state in which power storage device 2A is disposed below floor panel 4.

[0047] 8, the power storage device 2A is disposed below the floor panel 4. In the power storage device 2A, the power storage cells 10 arranged so that the short side surfaces 13 face the left side of the vehicle 1 (see FIG. 1) and the power storage cells 10 arranged so that the short side surfaces 14 face the left side of the vehicle 1 are alternately arranged along the front-to-rear direction D1 of the vehicle 1.

[0048] The floor panel 4 is formed with a plurality of protruding portions 5 that protrude downward of the vehicle 1. In the example shown in FIG. 8, the floor panel 4 is formed with four protruding portions 5. The plurality of protruding portions 5 are formed at intervals in the front-rear direction D1 of the vehicle 1. Each of the plurality of protruding portions 5 is formed so as to extend in the width direction D2 of the vehicle 1. Note that the protruding portions 5 are formed so as to be longer than the buffer member 50 in the width direction D2.

[0049] The energy storage device 2A includes an adhesive 40 that adheres the energy storage cells 10 to the upper case 21. The adhesive 40 is made of resin. The adhesive 40 is provided on the upper surface 11 of the energy storage cells 10. More specifically, the adhesive 40 is provided between the upper surface 11 of the energy storage cells 10 and the upper case 21 and along the upper surface 11. The plurality of energy storage cells 10 are fixed to the upper case 21 by the adhesive 40.

[0050] The multiple buffer members 50 are arranged between the upper case 21 and the floor panel 4 at intervals in the front-rear direction D1 of the vehicle 1. More specifically, the multiple buffer members 50 are arranged above the adhesive material 40. The multiple buffer members 50 are also arranged below the multiple protrusions 5, respectively. That is, the buffer members 50 are provided below the protrusions 5, and the adhesive material 40 is provided below the buffer members 50.

[0051] The electricity storage device 2A further includes a cooler 70 that cools the electricity storage cells 10. The cooler 70 is provided along the lower surface 12 of the electricity storage cells 10.

[0052] 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.

[0053] As described above, in the energy storage device 2A according to the second embodiment, adhesive 40 is provided on the upper surface 11 of the energy storage cell 10, and buffer member 50 is provided above adhesive 40 between upper case 21 and floor panel 4. As a result, a load from floor panel 4 is applied to buffer member 50, and the adhesive 40 located below buffer member 50 is pressed against energy storage cell 10 by the load from buffer member 50. Therefore, even if the amount of adhesive 40 used is reduced, it is possible to prevent energy storage cell 10 from peeling off from adhesive 40. Therefore, according to the energy storage device 2A according to the second embodiment, it is possible to reduce the amount of adhesive 40 used while fixing the energy storage cell 10.

[0054] Furthermore, the floor panel 4 is formed with a plurality of protrusions 5 that protrude downward from the vehicle 1, and the plurality of buffer members 50 are respectively disposed below the plurality of protrusions 5. As such, because the protrusions 5 are provided, the buffer members 50 are pressed against the upper case 21 by the protrusions 5, and the adhesive 40 located below the buffer members 50 is pressed more strongly against the energy storage cells 10 than in a case where the protrusions 5 are not provided. Therefore, even if the amount of adhesive 40 used is reduced, it is possible to prevent the energy storage cells 10 from peeling off from the adhesive 40.

[0055] Furthermore, the buffer members 50 are formed to extend in the longitudinal direction of the energy storage cells 10 (the width direction D2 of the vehicle 1). Therefore, the load from the floor panel 4 can be applied to the energy storage cells 10 located below the buffer members 50. Therefore, even if the amount of adhesive 40 used is reduced, peeling of the energy storage cells 10 from the adhesive 40 can be suppressed.

[0056] [Variations] The power storage devices 2, 2A only need to include at least one power storage cell 10. The power storage devices 2, 2A only need to include at least one buffer member 50.

[0057] In the above-described first and second embodiments, a plurality of protrusions 5 are formed on the floor panel 4, but only one protrusion 5 may be formed on the floor panel 4. When only one protrusion 5 is formed on the floor panel 4, it is sufficient that the adhesive 40 is provided on the upper surface 11 of the energy storage cell 10 and that at least one of the buffer members 50 is disposed below the protrusion 5. The remaining buffer members 50 are provided above the adhesive 40 between the upper case 21 and the floor panel 4.

[0058] Furthermore, the protrusion 5 does not have to be formed on the floor panel 4. In that case, it is sufficient that the adhesive 40 is provided on the upper surface 11 of the energy storage cell 10, and at least one buffer member 50 is provided above the adhesive 40 between the upper case 21 and the floor panel 4.

[0059] 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 above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0060] 1 vehicle, 2, 2A energy storage device, 3 vehicle frame, 4 floor panel, 5 protrusion, 10 energy storage cell, 11 upper surface, 12 lower surface, 13, 14 short side, 15, 16 long side, 17 positive terminal, 18 negative terminal, 19 cell smoke exhaust valve, 20 storage case, 21 upper case, 22 lower case, 24 bottom plate, 25 peripheral wall, 26, 27 support portion, 28A front wall, 28B rear wall, 28C left side wall, 28D right side wall, 29 bolt, 30 left roof rail, 31 right roof rail, 32 left frame, 33 right frame, 34 first left pillar, 35 second left pillar, 36 third left pillar, 37 first right pillar, 38 second right pillar, 39 third right pillar, 40 adhesive, 50 Buffer member, 60, 61, 62, 63, 64 partition wall, 70 cooler, 80 insulating plate, D1 front-to-rear direction, D2 width direction, D3 height direction.

Claims

1. An electricity storage device disposed under a floor panel of a vehicle, at least one storage cell; a housing case including an upper case and housing the at least one storage cell; an adhesive provided on an upper surface of the at least one storage cell and adhering the at least one storage cell to the upper case; the power storage device further comprising: at least one buffer member disposed between the upper case and the floor panel and above the adhesive material.

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

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

4. A vehicle equipped with the power storage device according to any one of claims 1 to 3, The floor panel is formed with a protrusion that protrudes downward, A vehicle, wherein one of the at least one buffer member is disposed below the protrusion.

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