Power storage module

Abstract

This power storage module (10) is provided with a plurality of power storage devices (20) and a holder (50) that has a plurality of housing parts (51), wherein each of the plurality of power storage devices (20) is housed in corresponding one of the plurality of housing parts (51), and the holder (50) includes: a skeleton part (54) composed of a first material; and a deformation part (55) composed of a second material having a strength lower than that of the first material, wherein the deformation part (55) is disposed along a first direction orthogonal to the axial direction of the power storage devices (20).

Description

Energy storage module

[0001] The present disclosure relates to an energy storage module.

[0002] An electric storage module is used as a power source equipped with a plurality of electric storage devices. The electric storage module may be mounted on a vehicle. In an electric storage module mounted on a vehicle, if an impact load is applied, for example, during a side collision of the vehicle, the load may be applied to the electric storage devices, causing the electric storage devices to deform and become unsafe. For example, Patent Document 1 discloses a technology in which a recessed shape provided in a holder breaks the holder during a side collision of the vehicle, thereby preventing the load from being applied to the electric storage devices.

[0003] JP 2015-156320 A

[0004] There is room for further improvement in the safety of energy storage modules, not just in vehicles.

[0005] The energy storage module according to the present disclosure comprises a plurality of energy storage devices and a holder having a plurality of storage sections, each of the plurality of energy storage devices being housed in a corresponding one of the plurality of storage sections, the holder including a skeletal section made of a first material and a deforming section made of a second material having a lower strength than the first material, and the deforming section being arranged along a first direction perpendicular to the axial direction of the energy storage devices.

[0006] The energy storage module of the present disclosure can improve safety.

[0007] FIG. 1 is a perspective view showing an electric storage module as an example of an embodiment; FIG. 2 is an axial cross-sectional view showing an electric storage device; FIG. 3 is a perspective view showing a lower holder as an example of an embodiment; FIG. 4 is a plan view showing a lower holder as an example of an embodiment; FIG. 5 is a bottom view showing a lower holder as an example of an embodiment; FIG. 6 is a front view showing a lower holder as an example of an embodiment; and FIG. 7 is a view for explaining a case where an impact load is applied to the lower holder.

[0008] An example of an embodiment of the present disclosure will be described in detail below. In the following description, specific shapes, materials, directions, numerical values, etc. are examples for facilitating understanding of the present disclosure, and can be appropriately changed according to the application, purpose, specifications, etc.

[0009] [Electricity Storage Module] An electric power storage module 10 as an example of an embodiment will be described with reference to FIG.

[0010] The power storage module 10 is mounted on an electric vehicle as a power source for the motor that drives the electric vehicle. However, the power storage module of the present disclosure is not limited to being mounted on an electric vehicle, and may be used as a power source for motor-driven electric devices such as power tools, power-assisted bicycles, electric motorcycles, electric wheelchairs, electric tricycles, and electric carts. Furthermore, the use of the power storage module of the present disclosure is not limited, and may be used as a power source for various electric devices used indoors and outdoors, such as vacuum cleaners, radios, lighting devices, digital cameras, and video cameras.

[0011] The power storage module of the present disclosure may be provided in a power storage pack. The power storage pack is a power source provided in the body of an electric vehicle and has a housing in which multiple power storage modules are arranged. Furthermore, the power storage module of the present disclosure may be provided in the body of the vehicle.

[0012] In the following, the axial direction of the cylindrical energy storage device 20 described later for the energy storage module 10 may be referred to as the vertical direction Z, the direction perpendicular to the vertical direction Z as the first direction Y, and the direction perpendicular to the vertical direction Z and the first direction Y as the second direction X.

[0013] The energy storage module 10 includes a plurality of energy storage devices 20, an upper holder 40 that holds the upper side of the energy storage devices 20 in the vertical direction Z and is formed from a first material, and a lower holder 50 that holds the lower side of the energy storage devices 20 in the vertical direction Z and is formed from the first material.

[0014] As will be described in detail later, the lower holder 50 has a plurality of storage sections 51 that respectively hold the power storage devices 20. The lower holder 50 also has a skeleton section 54 made of a first material and deforming sections 55 formed along the first direction Y of the power storage device 20 from a second material that is weaker than the first material (see FIG. 3 ). The deforming sections 55 can improve the safety of the power storage module 10 by reducing the load applied to the power storage device 20 when an impact load is applied to the power storage module 10. In this embodiment, "the deforming sections 55 are formed along the first direction Y" means "the deforming sections 55 are formed so as to be aligned in a zigzag pattern along the first direction Y as a whole."

[0015] Each of the housing sections 51 may be formed in the skeletal section 54 or may be formed in the skeletal section 54 and the deformation section 55 .

[0016] [Power Storage Device] The power storage device 20 as an example of an embodiment will be described in detail with reference to FIGS. 1 and 2. FIG.

[0017] 1 , the plurality of power storage devices 20 may be packed as densely as possible within the power storage module 10 while taking safety into consideration, and adjacent power storage devices 20 may be arranged in close proximity to each other. For example, the power storage devices 20 may be arranged such that six power storage devices 20 surround one power storage device 20 in a plan view (or arranged in a staggered pattern).

[0018] 2 , a cylindrical lithium-ion secondary battery is used as the power storage device 20 in this example, but a nickel-metal hydride battery, a capacitor, or the like may also be used. The power storage device 20 includes an electrode group 24, for example, in which a strip-shaped positive electrode 21 and a strip-shaped negative electrode 22 are wound with a strip-shaped separator 23 interposed therebetween, a cylindrical outer can 25 that accommodates the electrode group 24 together with an electrolyte solution, a sealing body 26 that seals the opening of the outer can 25 in an insulated state, a foil-shaped positive electrode lead 27 that electrically connects the positive electrode 21 and the sealing body 26, and a negative electrode lead 28 that electrically connects the negative electrode 22 and the outer can 25. An insulating gasket 29 may be disposed between the outer periphery of the sealing body 26 and the inner circumferential surface of the opening of the outer can 25.

[0019] An annular groove 25A is formed on the outer peripheral surface of the outer can 25, on the opening side. This groove 25A is formed as an annular protrusion on the inner peripheral surface of the outer can 25. The gasket 29 and sealing body 26 are placed on this annular protrusion inside the outer can 25. Furthermore, the opening end of the outer can 25 is crimped so as to be tilted toward the inside of the outer can 25, with the gasket 29 placed on the inner peripheral side. The crimped opening end and the protrusion sandwich the sealing body 26 in the axial direction via the gasket 29, thereby sealing the opening of the outer can 25.

[0020] The sealing body 26 may be provided with a current interrupter (CID) or an exhaust valve that ruptures when the pressure inside the outer can 25 reaches or exceeds a predetermined pressure. Furthermore, an insulating plate 30 for insulating the electrode group 24 from the outer can 25 may be provided between the electrode group 24 and the bottom of the outer can 25 or between the electrode group 24 and the protrusion (groove 25A). When the insulating plate 30 is provided, the positive electrode lead 27 may extend through a through-hole formed in the insulating plate 30. The negative electrode lead 28 may extend through a through-hole formed in the insulating plate 30 or may extend by bypassing the insulating plate 30. In the energy storage device 20, as described above, the positive electrode terminal may be provided on the top surface of the sealing body 26, and the negative electrode terminal may be provided on the crimped shoulder of the outer can 25.

[0021] [Upper Holder] The upper holder 40 will be described again with reference to FIG.

[0022] As described above, the upper holder 40 holds the upper sides of the plurality of power storage devices 20. The upper holder 40 may have a housing portion, a skeleton portion, a deformation portion, and a beam portion similar to those of the lower holder 50, the details of which will be described later, and may be configured to obtain the same functions and effects as the lower holder 50, or may be configured to have only a housing portion.

[0023] [Lower Holder] The lower holder 50 as an example of an embodiment will be described with reference to FIGS. 3 to 6. FIG.

[0024] As described above, the lower holder 50 serving as a holder holds the lower sides of the multiple power storage devices 20 in the accommodation portions 51. The length of the lower holder 50 in the up-down direction Z is sufficiently longer than the length of the upper holder 40 in the up-down direction Z. Therefore, as an example, the lower holder 50 holds the middle and lower portions of the multiple power storage devices 20. Note that in the power storage module of the present disclosure, the proportion of the portion of the accommodation portions 51 of the lower holder 50 that houses the power storage devices 20 is not particularly limited.

[0025] The skeleton 54 of the lower holder 50 is made of a first material, such as PBT-GF, PC, or PC-ABS.

[0026] 3 to 5 , the lower holder 50 includes a housing portion 51 that holds the power storage device 20, a deformation portion 55 formed in a zigzag shape along the first direction Y from a second material that is weaker than the first material, and a skeleton portion 54 formed from the first material. Furthermore, the skeleton portion 54 has a first beam portion 56 that extends so as to intersect with the deformation portion 55. In the following, it is assumed that an impact load is applied to the lower holder 50 from one side in the second direction X (the left side of the drawing).

[0027] The accommodation sections 51 are formed as recesses having a cylindrical hollow when viewed in the vertical direction Z. The power storage device 20 is fitted into the accommodation sections 51. For example, in a plan view, the accommodation sections 51 are formed such that six accommodation sections 51 surround one accommodation section 51. Alternatively, the multiple accommodation sections may simply be arranged in a staggered pattern, or the multiple accommodation sections may be arranged at equal intervals in the vertical and horizontal directions. Each accommodation section 51 includes a bottom surface section 52 that faces the lower end surface (bottom surface) of the power storage device 20, and an opening 53 that is formed in the bottom surface section 52 and exposes the bottom surface of the power storage device 20.

[0028] As described above, the deforming portion 55 is formed from a second material having a lower strength than the first material. The second material may be an elastomer, silicone, or the like. The second material may be a metal as long as it is lower in strength than the first material. The deforming portion 55 is arranged in the lower holder 50 so as to fill a through-hole or a recess in the skeleton portion 54. When the first material and the second material are both resins, the lower holder 50 can be formed by two-color molding. This molding method allows the lower holder 50 to be molded with the skeleton portion 54 and the deforming portion 55 in close contact with each other.

[0029] The deformation portion 55 is disposed between a pair of adjacent storage portions 51 arranged in a zigzag pattern along the first direction Y. Furthermore, the deformation portion 55 (one-end deformation portion 55a) is disposed between one outer surface in the first direction Y and the storage portion 51 formed at one end in the first direction Y, as viewed in the vertical direction Z. Furthermore, the deformation portion 55 (other-end deformation portion 55b) is also disposed between the other outer surface in the first direction Y and the storage portion 51 formed at the other end in the first direction Y. In other words, the deformation portion 55 is formed along the first direction Y from one outer surface to the other outer surface of the lower holder 50 in the first direction Y via the adjacent storage portions 51 arranged along the first direction Y. The width of the deformation portion 55 is smaller than the radius of the storage portion 51, as viewed in the vertical direction Z. However, the width of the deformation portion 55 is not limited to the above-described specification.

[0030] The deforming portion 55 disposed between the two housing portions 51 may have one end face in the extending direction of the deforming portion 55 exposed to the inner circumferential surface of one of the two housing portions 51, as viewed in the vertical direction Z, and the other end face of the deforming portion 55 exposed to the inner circumferential surface of the other of the two housing portions 51. In this case, the one end face and the other end face of the deforming portion 55 may form curved surfaces so as to form the inner circumferential surface of each housing portion 51 together with the skeleton portion 54. Also, either one of the one end face and the other end face of the deforming portion 55 may be exposed to the inner circumferential surface of the housing portion 51.

[0031] Furthermore, this deformation portion 55 may be formed to extend on the bottom surface portion 52 of the accommodating portion 51. In this case, the end of the deformation portion 55 formed on the bottom surface portion 52 may be connected to the inner peripheral edge of the opening 53 and exposed to the inner peripheral surface of the opening 53. The deformation portion 55 arranged between the end-arranged accommodating portion 51 and one outer surface of the lower holder 50 in the first direction Y may have one end face in the extending direction of the deformation portion 55 exposed to the inner peripheral surface of the accommodating portion 51 when viewed in the up-down direction Z, and the other end face of the deformation portion 55 exposed to one outer surface. Furthermore, this deformation portion 55 may be exposed to only one of the one outer surface of the lower holder 50 and the inner peripheral surface of the accommodating portion 51.

[0032] As a result, when an impact load is applied from one side in the second direction X, the deforming portion 55 compresses and breaks (is compressed and crushed, and deforms), thereby absorbing the impact load. Furthermore, although the accommodation portion 51 shrinks, deformation of the power storage device 20 is suppressed. As a result, it is possible to suppress the power storage device 20 from becoming unsafe.

[0033] The deformation portion of the present disclosure is not limited to the deformation portion 55 of the present embodiment, and may be formed to extend in a direction perpendicular to the direction in which the deformation portion is formed and the expected direction in which the impact load is applied, as viewed in the vertical direction Z. For example, when it is expected that the impact load is applied from one side in the first direction Y, the energy storage module 10 may be disposed so that the deformation portion 55 is formed along the second direction X.

[0034] 6, the deformation portions 55 are formed to extend from the upper end to the lower end along the vertical direction Z when viewed in the first direction Y. Second beam portions 57, which will be described in detail later, are formed at the upper and lower ends of the deformation portions 55 arranged at both ends in the first direction Y.

[0035] 3 to 5 again, two deformation portions 55 are connected to the accommodation portion 51 as viewed in the vertical direction Z. Furthermore, the two deformation portions 55 connected to the accommodation portion 51 are each connected to the other side of the second direction X at a position angled at approximately 60 degrees with respect to the second direction X as viewed in the vertical direction Z. In other words, as viewed in the vertical direction Z, the energy storage device 20 is held by a skeleton portion 54 made of a first material having a strength greater than that of the second material in a portion of approximately 240 degrees on one side of the second direction X.

[0036] As a result, when an impact load is applied from one side in the second direction X, the portion of the power storage device 20 at approximately 240° on one side in the second direction X does not deform, and the one side in the second direction X of the power storage device 20 is held, thereby suppressing deformation of the power storage device 20. As a result, it is possible to suppress the power storage device 20 from becoming unsafe.

[0037] 5 , the first beam portion 56 of the skeleton portion 54 is formed at the lower end in the up-down direction Z so as to extend along the first direction Y so as to intersect with the deformation portion 55. The first beam portion 56 also forms part of the outer bottom surface of the lower holder 50. More specifically, the first beam portion 56 is formed at the lower end in the up-down direction Z so as to divide the deformation portion 55, which is formed in a zigzag shape along the first direction Y, in the second direction X. This allows the first beam portion 56 to reinforce the portion of the lower holder 50 where the deformation portion 55 is formed, and enables the shape of the lower holder 50 to be maintained under normal conditions.

[0038] The width of the first beam portion 56 is sufficiently smaller than the width of the deforming portion 55. As will be described in detail later, when an impact load is applied to the lower holder 50, the first beam portion 56 breaks before the deforming portion 55 undergoes compressive failure. The first beam portion of the present disclosure is not limited to the first beam portion 56 of the present embodiment, but may be formed to intersect with the deforming portion 55 along the first direction Y, similar to the deforming portion 55. The width of the first beam portion 56 and the number of first beam portions 56 per deforming portion 55 are not limited to those described above. Multiple first beam portions 56 may be provided per deforming portion 55. In this case, the deforming portions may be arranged at a predetermined interval in the vertical direction Z. Furthermore, a portion of the first beam portion 56 may constitute the bottom surface portion 52 of the accommodation portion 51. With this configuration, adjacent bottom surface portions 52 can be connected by the first beam portion 56, improving the strength of the skeleton portion 54.

[0039] 3 to 6 again, the second beam portions 57 of the skeleton portion 54 are disposed at both ends in the first direction Y, and are formed to extend in the second direction X at both ends in the up-down direction Z, that is, at both ends in the first direction Y, so as to intersect with the deforming portions 55. This allows the second beam portions 57 to reinforce the lower holder 50 in the second direction X, and enables the shape of the lower holder 50 to be maintained under normal conditions. The width of the second beam portions 57 is set to be sufficiently smaller than the width of the deforming portions 55. Note that, as will be described in detail later, when an impact load is applied to the lower holder 50, the second beam portions 57 break before the deforming portions 55 are compressed and fractured.

[0040] The second beam portion of the present disclosure is not limited to the second beam portion 57 of the present embodiment, and may be formed along the second direction X so as to intersect with the deforming portion 55 when viewed in the vertical direction Z. The second beam portion 57 may be formed only at the upper end or the lower end in the vertical direction Z. The second beam portion 57 may be formed only at one end or the other end in the first direction Y.

[0041] A case where an impact load is applied to the lower holder 50 will be described with reference to FIG.

[0042] As described above, when an impact load is applied to the lower holder 50 from one side in the second direction X (the left side of the drawing), the impact load is applied to one outer surface of the lower holder 50 in the second direction X. At this time, the first beam portion 56 and the second beam portion 57 that intersect with the deformed portion 55 (hereinafter referred to as the first row of deformed portions 55A) formed at one end of the lower holder 50 in the second direction X are damaged, and the first row of deformed portions 55A is compressed and broken.

[0043] The impact load can be absorbed by the compressive failure of the first row of deformation portions 55A. Furthermore, although the compressive failure of the first row of deformation portions 55A causes the storage portions 51 formed at the ends in the second direction X (hereinafter referred to as the first row of storage portions 51A) to shrink, the deformation of the first row of power storage devices 20 is limited to a small amount, and the first row of power storage devices 20 is prevented from becoming unsafe.

[0044] As described above, due to the compressive failure of the first-row deforming portions 55A and the contraction of the first-row accommodating portions 51A, the region 50A where the first-row accommodating portions 51A are formed withstands the impact load, absorbs part of the impact load, and transmits the impact load to the region 50B where the second-row accommodating portions 51B are formed. At this time, as with the first row, the first beam portion 56 and the second beam portion 57 reinforcing the second-row deforming portions 55B are damaged, the second-row deforming portions 55B are compressively failed, and the second-row accommodating portions 51B contract. Then, as with the first row, the impact load is absorbed, and deformation of the second-row power storage devices 20 is suppressed.

[0045] Furthermore, due to the compressive failure of the second row of deformation portions 55B and the contraction of the second row of accommodation portions 51B, the region 50B where the second row of accommodation portions 51B are formed withstands the impact load and absorbs a portion of the impact load, and transmits the impact load to the region where the third row of accommodation portions 51 are formed. In this way, the region where the accommodation portions 51 are formed due to the compressive failure of the deformation portions 55 and the contraction of the accommodation portions 51 in each row absorbs a portion of the impact load and withstands the impact load, and the entire lower holder 50 can absorb the impact load.

[0046] As a result, when an impact load is applied, the impact load is absorbed by the lower holder 50, which suppresses deformation of each power storage device 20 and prevents each power storage device 20 from becoming unsafe. As a result, the safety of the power storage module 10 can be improved.

[0047] The present disclosure is further described by the following embodiments.

[0048] Configuration 1: A storage module comprising: a plurality of power storage devices; and a holder having a plurality of storage sections, each of the plurality of power storage devices being stored in a corresponding one of the plurality of storage sections; the holder including a skeletal section made of a first material; and a deforming section made of a second material having a strength lower than that of the first material; the deforming section being arranged along a first direction perpendicular to an axial direction of the power storage devices.

[0049] Configuration 2: The energy storage module according to Configuration 1, wherein the plurality of accommodating sections include a first accommodating section and a second accommodating section adjacent to the first accommodating section, the first accommodating section and the second accommodating section are aligned in the first direction, and the deforming section is disposed between the first accommodating section and the second accommodating section.

[0050] Configuration 3: The energy storage module according to Configuration 2, wherein one end face of the deformable portion is exposed to an inner circumferential surface of the first housing portion, and the other end face of the deformable portion is exposed to an inner circumferential surface of the second housing portion.

[0051] Configuration 4: The energy storage module according to any one of configurations 1 to 3, wherein the holder further has a one-end deforming portion made of the second material having a strength lower than that of the first material, and an other-end deforming portion made of the second material having a strength lower than that of the first material, the one-end deforming portion being arranged between a first outer surface of the holder and a third accommodating portion provided at one end of the plurality of accommodating portions, and the other-end deforming portion being arranged between the other outer surface of the holder and a fourth accommodating portion formed at the other end of the plurality of accommodating portions.

[0052] Configuration 5: The energy storage module described in Configuration 4, wherein one end face of the one-end deformation portion is exposed to the first outer surface, the other end face of the one-end deformation portion is exposed to the inner circumferential surface of the third accommodating portion, one end face of the other-end deformation portion is exposed to the other outer surface, and the other end face of the other-end deformation portion is exposed to the inner circumferential surface of the fourth accommodating portion.

[0053] Configuration 6: The energy storage module according to any one of configurations 1 to 5, comprising a plurality of deformation sections, each of which is the deformation section, and wherein two corresponding deformation sections of the plurality of deformation sections are arranged around each of the plurality of accommodation sections.

[0054] Configuration 7: The energy storage module described in Configuration 6, wherein the two deformation portions are connected to corresponding ones of the plurality of accommodating portions so as to be positioned at approximately 60 degrees with respect to the axial direction of the energy storage device and a second direction perpendicular to the first direction.

[0055] Configuration 8: The energy storage module according to any one of configurations 1 to 7, wherein the skeleton portion has a first beam portion that extends along the first direction so as to intersect with the deformation portion.

[0056] Configuration 9: The energy storage module according to configuration 8, wherein the first beam portion is formed at least at one end in the axial direction of the energy storage device.

[0057] Configuration 10: The energy storage module according to any one of configurations 1 to 9, wherein the skeleton portion has a second beam portion extending along the second direction so as to intersect with the deformation portion.

[0058] Configuration 11: The energy storage module according to configuration 10, wherein the second beam portion is formed at least at one end in the first direction.

[0059] Configuration 12: The energy storage module according to configuration 10 or 11, wherein the second beam portion is formed at least at one end in the axial direction of the energy storage device.

[0060] Configuration 13: The energy storage module according to any one of configurations 1 to 12, wherein the first material and the second material are resins.

[0061] It should be noted that the present disclosure is not limited to the above-described embodiments and their variations, and it goes without saying that various modifications and improvements are possible within the scope of the matters described in the claims of the present application.

[0062] REFERENCE SIGNS LIST 10 Energy storage module 20 Energy storage device 21 Positive electrode 22 Negative electrode 23 Separator 24 Electrode group 25 Outer can 25A Groove 26 Sealing body 27 Positive electrode lead 28 Negative electrode lead 29 Gasket 30 Insulating plate 40 Upper holder 50 Lower holder 50A First row region 50B Second row region 51 Storage section 52 Bottom surface section 53 Opening 54 Skeleton 55 Deformation section 55a One end deformation section 55b Other end deformation section 56 First beam section 57 Second beam section X Second direction Y First direction Z Up-down direction

Claims

1. A plurality of power storage devices; a holder having a plurality of receiving portions; Equipped with each of the plurality of power storage devices is accommodated in a corresponding one of the plurality of accommodation sections; The holder is a skeleton portion made of a first material; a deformed portion made of a second material having a strength lower than that of the first material; Including, the deformation portion is arranged along a first direction perpendicular to an axial direction of the power storage device, Energy storage module.

2. The energy storage module according to claim 1, The plurality of storage sections include a first storage section, a second storage section adjacent to the first storage section, Including, the first accommodating portion and the second accommodating portion are aligned in the first direction, The deformation portion is disposed between the first accommodation portion and the second accommodation portion. Energy storage module.

3. The energy storage module according to claim 2, One end surface of the deformation portion is exposed to the inner circumferential surface of the first accommodating portion, The other end surface of the deformation portion is exposed to the inner circumferential surface of the second accommodating portion. Energy storage module.

4. The energy storage module according to claim 1, the holder further includes a one-end deforming portion made of the second material having a strength lower than that of the first material, and an other-end deforming portion made of the second material having a strength lower than that of the first material, the one-end deforming portion is disposed between a first outer surface of the holder and a third housing portion provided at one end of the plurality of housing portions, The other-end deformation portion is disposed between the other outer surface of the holder and a fourth housing portion formed at the other end of the plurality of housing portions. Energy storage module.

5. The energy storage module according to claim 4, One end surface of the one-end deformation portion is exposed to the first outer surface, and the other end surface of the one-end deformation portion is exposed to the inner circumferential surface of the third accommodating portion, one end surface of the other end deformation portion is exposed to the other outer surface, and the other end surface of the other end deformation portion is exposed to the inner circumferential surface of the fourth accommodating portion; Energy storage module.

6. The energy storage module according to claim 1, A plurality of deformation portions are provided, Each of the plurality of deformation portions is the deformation portion, Two corresponding deformation portions among the plurality of deformation portions are arranged around each of the plurality of storage portions. Energy storage module.

7. The energy storage module according to claim 6, the two deformation portions are connected to corresponding ones of the plurality of accommodation portions so as to be positioned at approximately 60° with respect to an axial direction of the power storage device and a second direction orthogonal to the first direction, Energy storage module.

8. The energy storage module according to claim 1, the skeleton portion has a first beam portion extending along the first direction so as to intersect with the deformation portion; Energy storage module.

9. The energy storage module according to claim 8, The first beam portion is formed at least at one end portion in the axial direction of the power storage device. Energy storage module.

10. The energy storage module according to claim 8, The skeleton portion has a second beam portion that extends in a second direction perpendicular to the axial direction of the energy storage device and the first direction so as to intersect with the deformation portion.

11. The energy storage module according to claim 10, The second beam portion is formed at least at one end in the first direction. Energy storage module.

12. The energy storage module according to claim 10, The second beam portion is formed at least at one end portion in the axial direction of the power storage device. Energy storage module.

13. The energy storage module according to claim 1, the first material and the second material are resins; Energy storage module.