Electricity storage device

Abstract

The utility model relates to an electric power storage device which is carried on a vehicle and is provided with a laminated body formed by laminating electric power storage modules in the vertical direction, and a storage shell for storing the laminated body. The storage housing includes a top plate located on a housing upper surface of the storage housing, a bottom plate located on a housing lower surface of the storage housing, a peripheral wall connecting the top plate and the bottom plate, and a holding member. The laminate includes an upper surface, a lower surface, and a peripheral surface connecting the upper surface and the lower surface. The holding member has a holding upright wall and a holding flange. The holding upright wall is formed so as to cover the peripheral surface, and the holding flange is provided on the holding upright wall and is fixed to the peripheral wall.

Description

Technical Field

[0001] This disclosure relates to energy storage devices. Background Technology

[0002] For example, Japanese Patent Application Publication No. 2024-007753 discloses a structure for the side portion of a bipolar battery mounted on the lower part of a vehicle.

[0003] The battery involved in the aforementioned Japanese Patent Application Publication No. 2024-007753 is sensitive to impacts from the surrounding environment, and there is room for improvement in protecting the battery from impacts from the surrounding environment. Utility Model Content

[0004] This disclosure was made to solve the above-mentioned problems, and its purpose is to provide an energy storage device that can suppress damage caused by shocks from the surrounding environment.

[0005] The first aspect of this disclosure relates to an energy storage device mounted on a vehicle, wherein the energy storage device comprises: a laminated body formed by stacking energy storage modules in a vertical direction, and a housing housing for housing the laminated body. The housing housing includes a top plate located on the upper surface of the housing housing, a bottom plate located on the lower surface of the housing housing, a peripheral wall connecting the top plate and the bottom plate, and a retaining member. The laminated body includes an upper surface and a lower surface, and a peripheral surface connecting the upper surface and the lower surface. The retaining member has a retaining upright wall and a retaining flange. The retaining upright wall is formed to cover the peripheral surface, and the retaining flange is disposed on the retaining upright wall and fixed to the peripheral wall.

[0006] The retaining wall in the energy storage device according to the first aspect of this disclosure includes a first sidewall and a second sidewall arranged in the width direction, and a retaining flange is fixed to at least one of the first sidewall and the second sidewall.

[0007] Based on the energy storage device described in technical solution 1 or technical solution 2, the holding member in the energy storage device according to the first aspect of this disclosure further has a covering member, which is formed to extend in a ring shape from at least one of the ends of the holding upright wall arranged in the vertical direction, and is formed to cover the outer edge of the laminate when viewed from a position away from the laminate in the vertical direction.

[0008] The covering component in the energy storage device according to the first aspect of this disclosure includes an upper covering portion connected to the upper end of a retaining upright wall, the upper covering portion being bonded to a portion of the top plate corresponding to the upper covering portion in the vertical direction.

[0009] The retaining component in the energy storage device according to the first aspect of this disclosure is bonded to the laminate.

[0010] According to the energy storage device disclosed herein, damage to the energy storage device can be suppressed even when subjected to impacts from the surrounding environment.

[0011] The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals denote the same elements. Attached Figure Description

[0012] Figure 1 This is a top view showing a simplified structure of the energy storage device involved in this embodiment.

[0013] Figure 2 yes Figure 1 The sectional view of section II-II shown.

[0014] Figure 3 yes Figure 1 A simplified perspective view of the stacked components and holding parts in an energy storage device. Detailed Implementation

[0015] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the drawings, the same or equivalent parts will be labeled with the same reference numerals without being described repeatedly.

[0016] Figure 1 This is a simplified exploded perspective view of a vehicle equipped with the energy storage device according to this embodiment. Furthermore, Figure 1 The vertical direction H represents the vertical direction of vehicle 1. The width direction W represents the width direction of vehicle 1. The front-to-back direction D represents the front-to-back direction of vehicle 1.

[0017] Vehicle 1 includes a body 2 and an energy storage device 3. Vehicle 1 may include, for example, a plug-in hybrid electric vehicle (PHEV), a battery electric vehicle (BEV), or a fuel cell electric vehicle (FCEV).

[0018] The body 2 includes a lower body 4 and a common trim panel 5. The lower body 4 has a pair of side frames 4a and 4b arranged in the width direction W. The common trim panel 5 is disposed opposite the lower body 4 in the vertical direction H, separated by an energy storage device 3. In addition, the common trim panel 5 is fixed to the lower body 4.

[0019] The energy storage device 3 is, for example, a device for storing the driving power of the vehicle 1. The energy storage device 3 is fixed to the vehicle body 2 by fastening it to a pair of side frame frames 4a and 4b respectively.

[0020] Figure 2 yes Figure 1 The cross-sectional view shown is section II-II. The energy storage device 3 has a laminate 7, an insulating sheet 8, an elastic sheet 9, and a housing 10.

[0021] The laminate 7 is formed, for example, into a cubic shape. The laminate 7 has an upper surface 13, a lower surface 14, and a peripheral surface 15. The upper surface 13 and the lower surface 14 are surfaces arranged in the vertical direction H. Furthermore, the upper surface 13 is a surface located near the lower body 4 relative to the lower surface 14. The peripheral surface 15 is a surface that connects the outer peripheral edge of the upper surface 13 to the outer peripheral edge of the lower surface 14.

[0022] The stack 7 includes a battery storage module 11 and a cooling device 12. The battery storage module 11 is, for example, a bipolar battery. If the battery storage module 11 is viewed from a position away from it in the vertical direction H, the battery storage module 11 is formed into a rectangular shape. The battery storage modules 11 are stacked in the vertical direction H with the cooling device 12 spaced apart from them.

[0023] The cooling device 12 is conductive. Therefore, the cooling device 12 is electrically connected to the adjacent battery module 11 in the vertical direction H. The cooling device 12 has an internal flow path 12a. By allowing refrigerant to flow through the flow path 12a, the cooling device 12 can cool the battery module 11.

[0024] The insulating sheet 8 is formed of an insulating material. The insulating sheet 8 is disposed on the upper surface 13 and lower surface 14 of the laminate 7. The elastic sheet 9 is formed of an elastic body. The elastic sheet 9 is disposed on the insulating sheet 8.

[0025] The storage casing 10 has an upper cover 16, a lower casing 17, and a retaining member 18.

[0026] The top cover 16 is formed by a top plate 19, an upper flange 20 and a lower wall 21.

[0027] The top plate 19 is located on the upper surface of the housing 10. The top plate 19 is formed to cover the upper surface 13 of the laminate 7. The top plate 19 is a plate-shaped component. If the top plate 19 is viewed from a position away from it in the vertical direction H, the top plate 19 is rectangular in shape.

[0028] The upper flange 20 is formed to extend in the width direction W. The top plate 19 and the upper flange 20 are arranged at intervals in the vertical direction H. The upper flange 20 has a first upper flange 20a and a second upper flange 20b. The first upper flange 20a and the second upper flange 20b are sandwiched between a laminate 7 and are arranged at intervals along the width direction W. The first upper flange 20a and the second upper flange 20b are disposed on the same surface in the vertical direction H.

[0029] The drooping wall 21 connects the top plate 19 to the upper flange 20. More specifically, the drooping wall 21 has a first drooping wall 21a and a second drooping wall 21b. The first drooping wall 21a and the second drooping wall 21b are arranged in the width direction W. The first drooping wall 21a connects one end of the top plate 19 arranged in the width direction W to one end of the first upper flange 20a arranged in the width direction W. The second drooping wall 21b connects the other end of the top plate 19 arranged in the width direction W to one end of the second upper flange 20b arranged in the width direction W.

[0030] The lower shell 17 is formed to open upwards. The lower shell 17 is formed by a base plate 22, a lower flange 23 and a raised wall 24.

[0031] The base plate 22 is located on the lower surface of the housing 10. The base plate 22 is a plate-shaped component. When viewed from a position away from the base plate 22 in the vertical direction H, the base plate 22 has the same shape as the top plate 19. The base plate 22 is spaced apart from the top plate 19 in the vertical direction H by a laminate 7.

[0032] The lower flange 23 is formed to extend in the width direction W. The top plate 19 and the lower flange 23 are arranged at intervals in the vertical direction H. The lower flange 23 has a first lower flange 23a and a second lower flange 23b. The first lower flange 23a and the second lower flange 23b are sandwiched between a laminate 7 and are arranged at intervals in the width direction W. The first lower flange 23a and the second lower flange 23b are disposed on the same surface in the vertical direction H.

[0033] The upright wall 24 connects the base plate 22 to the lower flange 23. More specifically, the upright wall 24 has a first upright wall 24a and a second upright wall 24b. The first upright wall 24a and the second upright wall 24b are arranged in the width direction W. The first upright wall 24a connects one end of the base plate 22 arranged in the width direction W to one end of the first lower flange 23a arranged in the width direction W. The second upright wall 24b connects the other end of the base plate 22 arranged in the width direction W to one end of the second lower flange 23b arranged in the width direction W.

[0034] Figure 3 Showing Figure 1 A simplified perspective view of the laminate and retaining components in the energy storage device. The retaining component 18 is formed by a retaining upright wall 25, a covering component 26, and a retaining flange 27.

[0035] The retaining wall 25 is formed in a ring shape to cover the peripheral surface 15 of the laminate 7. The retaining wall 25 has a first side wall 25a and a second side wall 25b. The first side wall 25a is disposed at one end of the retaining wall 25 arranged in the width direction W, and the second side wall 25b is disposed at the other end.

[0036] The covering member 26 has an upper covering portion 26a and a lower covering portion 26b. The upper covering portion 26a is formed in a ring shape to cover the outer edge of the upper surface 13 of the laminate 7 and its vicinity. The upper covering portion 26a is connected to the upper portion of the end of the retaining wall 25 that is arranged in the vertical direction H.

[0037] The lower end covering portion 26b is formed in a ring shape to cover the outer edge of the lower surface 14 of the laminate 7 and its vicinity. The lower end covering portion 26b is connected to the lower portion of the end of the retaining wall 25 that is arranged in the vertical direction H.

[0038] The retaining flange 27 is formed to extend from the upright wall 24 in the width direction W. More specifically, the retaining flange 27 has a first retaining flange 27a and a second retaining flange 27b. The first retaining flange 27a and the second retaining flange 27b are disposed on the same surface in the vertical direction H. The first retaining flange 27a is formed to extend from the first sidewall 25a in the width direction W. The second retaining flange 27b is formed to extend from the second sidewall 25b in the width direction W.

[0039] Refer again Figure 2 The upper end covering portion 26a is bonded to the top plate 19 by means of the first adhesive A1 at the portion of the top plate 19 corresponding to the upper end covering portion 26a in the vertical direction H.

[0040] The second adhesive A2 is used to bond the retaining component 18 to the laminate 7. Specifically, the second adhesive A2 is applied to the peripheral surface 15 of the laminate 7, the outer edge of the upper surface 13 and the area thereon corresponding to the upper end covering portion 26a, and the outer edge of the lower surface 14 and the area thereon corresponding to the lower end covering portion 26b.

[0041] The housing 10 is formed by a top plate 19, a bottom plate 22, and a peripheral wall 28. The top plate 19 is located on the upper surface of the housing 10 in the vertical direction H. The bottom plate 22 is located on the lower surface of the housing 10 in the vertical direction H. The peripheral wall 28 is formed to connect the outer peripheral edge of the top plate 19 to the outer peripheral edge of the bottom plate 22. The peripheral wall 28 is formed by an upper flange 20, a lower wall 21, a lower flange 23, and a raised wall 24. A retaining flange 27 is sandwiched between the upper flange 20 and the lower flange 23 and fixed in the vertical direction H. That is, the retaining flange 27 is fixed to the peripheral wall 28.

[0042] Furthermore, the first upper flange 20a, the first lower flange 23a, and the first retaining flange 27a are fixed to the above-mentioned Figure 1 The side frame 4a is shown. The second upper flange 20b, the second lower flange 23b, and the second retaining flange 27b are fixed to the side frame 4b.

[0043] The common trim panel 5 is disposed below the lower housing 17 of the energy storage device 3 in the vertical direction H. The common trim panel 5 is formed to open upwards. A space R is formed between the common trim panel 5 and the lower housing 17. The common trim panel 5 is formed of steel plate. The common trim panel 5 has a main body portion 29 and a pair of connecting portions 30.

[0044] A pair of connecting portions 30 are arranged at intervals in the width direction W. One end of each pair of connecting portions 30 is connected via the main body portion 29. The other end of each pair of connecting portions 30 is engaged with the outer periphery of the base plate 22. Thus, the common decorative panel 5 is fixed to the storage housing 10.

[0045] The space R is equipped with a first reinforcing member 31 and a second reinforcing member 32.

[0046] The first reinforcing member 31 is disposed in the space R and fixed to the lower surface 17a of the lower shell 17. Multiple first reinforcing members 31 are arranged at intervals in the width direction W. Each first reinforcing member 31 has a pair of joint portions 33, a main body portion 34, and a connecting portion 35. The joint portions 33 are arranged at intervals in the width direction W. The main body portion 34 is located between the pair of joint portions 33 and below them. The connecting portion 35 connects each end of the pair of joint portions 33 to the outer peripheral ends of the main body portion 34 arranged in the width direction W. The main body portion 34 and the connecting portion 35 are formed to protrude downward relative to the joint portions 33. The first reinforcing member 31 is fixed to the lower shell 17 by fixing the joint portions 33 to the lower surface 17a of the lower shell 17.

[0047] The second reinforcing member 32 is disposed in the space R and fixed to the upper surface 5a of the common trim panel 5. Multiple second reinforcing members 32 are arranged at intervals in the width direction W. Each second reinforcing member 32 has a pair of joint portions 36, a main body portion 37, and a connecting portion 38. The joint portions 36 are arranged at intervals in the width direction W. The main body portion 37 is disposed above the pair of joint portions 36, between them. The connecting portion 38 connects each end of the pair of joint portions 36 to the outer peripheral ends of the main body portion 34 arranged in the width direction W. The main body portion 37 and the connecting portion 38 are formed to protrude upwards relative to the joint portions 36. The second reinforcing member 32 is fixed to the common trim panel 5 by fixing the joint portions 36 to the upper surface 5a of the common trim panel 5.

[0048] Furthermore, a plurality of second reinforcing members 32 disposed in space R are respectively disposed between the first reinforcing members 31. Thus, in space R, the first reinforcing members 31 and the second reinforcing members 32 are arranged alternately in the width direction W.

[0049] In the above embodiment, the laminate 7 is constrained by the retaining member 18. The laminate 7 is disposed within the housing housing 10 at a distance from the lower housing 17 in the vertical direction H. By arranging it in this way, the retaining member 18 can be used as a grip to facilitate the handling of the laminate 7. When an impact is applied to the housing housing 10 from below in the vertical direction H toward above, the transmission of load to the laminate 7 can be suppressed.

[0050] The peripheral surface 15 of the laminate 7 housed in the housing cascading housing 10 in the above embodiment is protected by the retaining member 18. This arrangement allows impacts applied to the vehicle 1 from the surrounding environment to be transmitted to the laminate 7 via the retaining member 18. Since the retaining member 18 is in surface-to-surface contact with the laminate 7, localized loads on the laminate 7 can be suppressed, thereby suppressing concentrated loads on the energy storage modules 11. Furthermore, it can suppress the sliding of the plurality of energy storage modules 11 stacked in the vertical direction H in the width direction W. Consequently, damage to the energy storage modules 11 caused by impacts from the surrounding environment can be suppressed.

[0051] The retaining member 18, which constrains the laminate 7 housed in the housing shell 10 in the above embodiment, is fixed to the peripheral wall 28. By making it such that when an impact is applied to the housing shell 10 from the width direction W, the peripheral wall 28 disengages from the fixing portion of the retaining member 18, thereby suppressing the transmission of impact load to the laminate 7.

[0052] In the above embodiment, the upper end covering portion 26a of the retaining member 18 is bonded to the top plate 19 by the first adhesive A1 at the portion of the top plate 19 corresponding to the upper end covering portion 26a in the vertical direction. By doing so, the load applied to the retaining member 18 can be transferred to the upper cover 16.

[0053] In the above embodiment, the retaining wall 25 is formed in a ring-shaped manner to completely cover the peripheral surface 15 of the laminate 7, but this disclosure is not limited thereto. For example, the retaining wall 25 may also be formed to cover only the surfaces of the peripheral surface 15 of the laminate 7 that are arranged in the width direction W. Specifically, the retaining wall 25 may also be formed only by the first sidewall 25a and the second sidewall 25b. Alternatively, the retaining wall 25 may also be formed to cover only the surfaces of the peripheral surface 15 of the laminate 7 that are formed parallel to the front-rear direction D.

[0054] In the above embodiment, the retaining member 18 has a covering member 26, but this disclosure is not limited thereto. For example, the retaining member 18 may also not have a covering member 26.

[0055] In the above embodiment, the covering member 26 has an upper covering portion 26a and a lower covering portion 26b, but this disclosure is not limited thereto. The covering member 26 may also have only one of the upper covering portion 26a or the lower covering portion 26b.

[0056] In the above embodiment, the retaining flange 27 has a first retaining flange 27a and a second retaining flange 27b, but this disclosure is not limited thereto. For example, the retaining flange 27 may also have only one of the first retaining flange 27a and the second retaining flange 27b. In addition, the retaining flange 27 may also be formed to extend annularly from the retaining upright wall 25.

[0057] It should be understood that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of this disclosure is not defined by the description of the above embodiments, but by the claims, and is intended to cover all modifications that are equivalent in meaning and scope to the claims.

Claims

1. An energy storage device mounted on a vehicle, wherein, The energy storage device includes a stacked body formed by stacking energy storage modules in a vertical direction, and a housing shell for storing the stacked body. The storage housing includes a top plate located on the upper surface of the housing, a bottom plate located on the lower surface of the housing, a peripheral wall connecting the top plate and the bottom plate, and a retaining component. The laminate includes an upper surface and a lower surface, and a peripheral surface connecting the upper surface and the lower surface. The retaining component has a retaining upright wall and a retaining flange. The retaining wall is formed to cover the circumferential surface. The retaining flange is disposed on the retaining upright wall and fixed to the peripheral wall.

2. The energy storage device according to claim 1, wherein, The retaining wall includes a first sidewall and a second sidewall arranged in the width direction. The retaining flange is fixed to at least one of the first sidewall and the second sidewall.

3. The energy storage device according to claim 1 or 2, wherein, The retaining component also has a covering component. The covering member is formed to extend in a ring shape from at least one of the ends of the retaining upright wall arranged in the vertical direction, and is formed to cover the outer edge of at least one of the upper surface and the lower surface of the laminate.

4. The energy storage device according to claim 3, wherein, The covering component includes an upper covering portion connected to the upper end of the retaining upright wall. The upper covering part is bonded to the portion of the top plate that corresponds to the upper covering part in the vertical direction.

5. The energy storage device according to claim 1 or 2, wherein, The retaining component is bonded to the laminate.

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