Power storage device

Abstract

To provide a power storage device in which upward detachment of a power storage stack from a case can be restricted.SOLUTION: A power storage device 1 includes: a power storage stack 10 including a plurality of power storage cells; a case 20 opening upward and accommodating the power storage stack; and a restriction member 30 restricting upward detachment of the power storage stack from the case. The case 20 includes a side wall 22 provided on a side of the power storage stack in one direction. The restriction member 30 includes a fixed restriction portion 31 fixed to the side wall, and an interposed restriction portion 32 interposed between the fixed restriction portion and the power storage stack. The fixed restriction portion 31 has a shape in which the thickness in the one direction gradually increases toward the upper side. The interposed restriction portion 32 has a shape in which the thickness in the one direction gradually increases toward the lower side.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an electricity storage device. [Background technology]

[0002] For example, Japanese Patent Application Laid-Open No. 2020-87704 discloses a battery pack including a battery stack including a plurality of battery cells, a battery case, and a shim. The shim is disposed between the battery stack and a side wall of the battery case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-87704 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a battery pack such as that described in JP 2020-87704 A, there is room for improvement in terms of preventing the battery stack from falling out upward from the battery case.

[0005] An object of the present disclosure is to provide an electricity storage device capable of restricting upward separation of the electricity storage stack from the case. [Means for solving the problem]

[0006] According to one aspect of the present disclosure, there is provided an energy storage device comprising: an energy storage stack including a plurality of energy storage cells arranged in a line in one direction; a case that opens upward and houses the energy storage stack; and a regulating member that regulates the upward removal of the energy storage stack from the case, wherein the case includes a side wall provided on a side of the energy storage stack in the one direction, and the regulating member has a fixed regulating portion fixed to the side wall and an intervening regulating portion interposed between the fixed regulating portion and the energy storage stack, wherein the fixed regulating portion has a shape that gradually increases in thickness in the one direction as it extends upward, and the intervening regulating portion has a shape that gradually increases in thickness in the one direction as it extends downward. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide an electricity storage device capable of restricting upward detachment of the electricity storage stack from the case. [Brief description of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view that illustrates a schematic diagram of an electricity storage device according to an embodiment of the present disclosure. [Diagram 2] 11 is a cross-sectional view showing a state in which the electricity storage stack and the intervention restriction portion have been moved upward relative to the case; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present disclosure will now be described with reference to the accompanying drawings, in which the same or corresponding components are designated by the same reference numerals.

[0010] 1 is a cross-sectional view that illustrates a schematic diagram of an electricity storage device according to an embodiment of the present disclosure. The electricity storage device 1 is mounted, for example, on the bottom of a vehicle (not shown).

[0011] As shown in FIG. 1, the energy storage device 1 includes an energy storage stack 10 including a plurality of energy storage cells, a case 20, and a restricting member 30.

[0012] The power storage stack 10 includes a plurality of power storage cells arranged side by side in one direction (the left-right direction in FIG. 1). The power storage stack 10 may have a spacer (a resin frame) arranged between a pair of adjacent power storage cells.

[0013] The case 20 is open upward and houses the electricity storage stack 10. The case 20 has a bottom wall 21 provided below the electricity storage stack 10, and a side wall 22 provided on a side of the electricity storage stack 10 in one direction. The side wall 22 is configured as a part of a peripheral wall. The peripheral wall stands up from the bottom wall 21 and surrounds the electricity storage stack 10. In this embodiment, the peripheral wall is formed in a rectangular cylindrical shape.

[0014] The restricting member 30 restricts the electricity storage stack 10 from being removed upward from the case 20. The restricting member 30 is disposed inside the case 20. The restricting member 30 has a fixed restricting portion 31 and an interposed restricting portion 32.

[0015] The fixed restricting portion 31 is fixed to the side wall 22. In this embodiment, the fixed restricting portion 31 is fixed to the side wall 22 by a bolt B. The fixed restricting portion 31 has a shape in which the thickness in one direction gradually increases toward the top. The fixed restricting portion 31 has a fixed inclined surface 31a formed by an inner end face in one direction. The fixed inclined surface 31a is inclined so as to gradually move away from the side wall 22 toward the top. The fixed inclined surface 31a may extend from the lower end to the upper end of the fixed restricting portion 31.

[0016] The intervening regulating portion 32 is interposed between the fixed regulating portion 31 and the electricity storage stack 10. The intervening regulating portion 32 may be fixed to the electricity storage stack 10 by an appropriate means. The intervening regulating portion 32 has a shape in which the thickness in one direction gradually increases toward the bottom. The intervening regulating portion 32 has an intervening inclined surface 32a facing the fixed inclined surface 31a. The intervening inclined surface 32a is inclined so as to gradually approach the side wall 22 toward the bottom. The intervening inclined surface 32a may extend from the lower end to the upper end of the intervening regulating portion 32.

[0017] The sum of the dimension of the upper end of the fixed regulating portion 31 in one direction, the dimension of the lower end of the interposed regulating portion 32 in one direction, and the dimension of the power storage stack 10 in one direction is greater than the dimension of the upper end (opening) of the case 20 in one direction. Therefore, as shown in Fig. 2, even if the power storage stack 10 and the interposed regulating portion 32 move upward relative to the case 20 due to vibration or the like, the interposed inclined surface 32a comes into contact with the fixed inclined surface 31a, thereby increasing the restraining force of the power storage stack 10 in one direction, and thus detachment of the power storage stack 10 from the case 20 is suppressed.

[0018] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0019] [Aspect 1] A storage stack including a plurality of storage cells arranged in one direction; a case that is open upward and that houses the power storage stack; a restricting member that restricts upward removal of the power storage stack from the case, the case includes a side wall provided on a side of the power storage stack in the one direction, The regulating member is A fixed restricting portion fixed to the side wall; an interposition restricting portion interposed between the fixed restricting portion and the power storage stack, the fixed restriction portion has a shape in which the thickness in the one direction gradually increases toward the upper side, The interposition restriction portion has a shape such that a thickness in the one direction gradually increases downward.

[0020] In this energy storage device, as the energy storage stack and the interposition regulating portion move upward relative to the case, the interposition regulating portion abuts against the fixed regulating portion, increasing the restraining force of the energy storage stack in one direction, thereby preventing the energy storage stack from coming off the case.

[0021] [Aspect 2] 2. The power storage device according to aspect 1, wherein the interposition restriction unit is fixed to the power storage stack.

[0022] [Aspect 3] The energy storage device of aspect 1 or 2, wherein the sum of the dimension of the upper end of the fixed regulating portion in the one direction, the dimension of the lower end of the interposed regulating portion in the one direction, and the dimension of the energy storage stack in the one direction is greater than the dimension of the upper end of the case in the one direction.

[0023] It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The scope of the present disclosure is indicated by the claims, not by the description of the above embodiments, and further includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0024] 1 Energy storage device, 10 Energy storage stack, 20 Case, 21 Bottom wall, 22 Side wall, 30 Regulating member, 31 Fixed regulating portion, 31a Fixed inclined surface, 32 Interposed regulating portion, 32a Interposed inclined surface.

Claims

1. A storage stack including a plurality of storage cells arranged in one direction; a case that is open upward and that houses the power storage stack; a restricting member that restricts upward removal of the power storage stack from the case, the case includes a side wall provided on a side of the power storage stack in the one direction, The regulating member is A fixed restricting portion fixed to the side wall; an interposition restricting portion interposed between the fixed restricting portion and the power storage stack, the fixed restriction portion has a shape in which the thickness in the one direction gradually increases toward the upper side, The interposition restriction portion has a shape such that a thickness in the one direction gradually increases downward.

2. The power storage device according to claim 1 , wherein the interposition restriction portion is fixed to the power storage stack.

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