Electricity storage device

Abstract

A power storage device is provided with: a power storage stack including a plurality of power storage cells; a case which is open at the upper part and accommodates the power storage stack; and a restricting member which restricts the upward separation of the power storage stack from the case. The case includes a side wall that is disposed on a side of the electricity storage stack in the one direction. The restricting member has a fixed restricting portion fixed to the side wall, and an intervening restricting portion interposed between the fixed restricting portion and the electricity storage stack. The fixing restricting portion has a shape in which the thickness in the one direction gradually increases as the fixing restricting portion faces upward. The intervention restricting portion has a shape in which the thickness in the one direction gradually increases toward the lower side.

Description

Technical Field

[0001] The present disclosure relates to a power storage device. Background Art

[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, wherein the shim is disposed between the battery stack and a side wall of the battery case. Summary of the invention

[0003] In the battery pack described in Japanese Patent Application Laid-Open No. 2020-87704, there is room for improvement in suppressing the battery stack from detaching upward from the battery case.

[0004] An object of the present disclosure is to provide an electricity storage device capable of preventing an electricity storage stack from being dislodged upward from a case.

[0005] A power storage device according to one embodiment of the present disclosure includes:

[0006] A power storage stack including a plurality of power storage cells arranged in a row in one direction;

[0007] a housing, which is open at the top and accommodates the battery stack; and

[0008] a restricting member for restricting the battery stack from being separated upward from the casing,

[0009] The housing includes a side wall, and the side wall is arranged on the side of the battery stack in the one direction.

[0010] The restriction member includes a fixed restriction portion fixed to the side wall and an intervening restriction portion interposed between the fixed restriction portion and the battery stack.

[0011] The fixed limiting portion has a shape in which the thickness in the one direction gradually increases as it goes upward.

[0012] The intervention restricting portion has a shape in which the thickness in the one direction gradually increases as it goes downward.

[0013] According to the present disclosure, it is possible to provide an electricity storage device capable of preventing an electricity storage stack from being separated upward from a case. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described hereinafter with reference to the accompanying drawings, wherein like reference numerals represent like elements, and wherein:

[0015] Figure 1 This is a cross-sectional view schematically showing a power storage device according to one embodiment of the present disclosure.

[0016] Figure 2 This is a cross-sectional view schematically showing a state in which the battery stack and the intervention restriction portion are moved upward relative to the case. DETAILED DESCRIPTION

[0017] The embodiments of the present disclosure will be described with reference to the accompanying drawings. In the drawings referred to below, the same or corresponding components are denoted by the same reference numerals.

[0018] Figure 1 1 is a cross-sectional view schematically showing an electric storage device according to an embodiment of the present disclosure. The electric storage device 1 is mounted on, for example, a bottom portion of a vehicle (not shown).

[0019] like Figure 1 As shown, the power storage device 1 includes a power storage stack 10 including a plurality of power storage cells, a case 20 , and a restriction member 30 .

[0020] The battery stack 10 includes a Figure 1 The power storage stack 10 may include a plurality of power storage cells arranged in the left-right direction (in the right and left direction). The power storage stack 10 may include a spacer (resin frame) disposed between a pair of power storage cells adjacent to each other.

[0021] The housing 20 is open at the top and accommodates the battery stack 10. The housing 20 has a bottom wall 21 provided below the battery stack 10 and a side wall 22 provided on the side of the battery stack 10 in one direction. The side wall 22 is formed by a part of the peripheral wall. The peripheral wall stands upright from the bottom wall 21 and surrounds the battery stack 10. In the present embodiment, the peripheral wall is formed in a square cylindrical shape.

[0022] The restriction member 30 restricts the battery stack 10 from being separated upward from the case 20. The restriction member 30 is disposed in the case 20. The restriction member 30 includes a fixed restriction portion 31 and an intervening restriction portion 32.

[0023] The fixed limiting portion 31 is fixed to the side wall 22. In the present embodiment, the fixed limiting portion 31 is fixed to the side wall 22 by a bolt B. The fixed limiting portion 31 has a shape in which the thickness in one direction gradually increases as it goes upward. The fixed limiting portion 31 has a fixed inclined surface 31a constituted by an inner end surface in one direction. The fixed inclined surface 31a is inclined in a manner that gradually moves away from the side wall 22 as it goes upward. The fixed inclined surface 31a may also extend from the lower end portion of the fixed limiting portion 31 to the upper end portion.

[0024] The intervention limiting portion 32 is interposed between the fixed limiting portion 31 and the battery stack 10. The intervention limiting portion 32 may also be fixed to the battery stack 10 by an appropriate method. The intervention limiting portion 32 has a shape in which the thickness in one direction gradually increases as it goes downward. The intervention limiting portion 32 has an intervention inclined surface 32a opposite to the fixed inclined surface 31a. The intervention inclined surface 32a is inclined in a manner that gradually approaches the side wall 22 as it goes downward. The intervention inclined surface 32a may also extend from the lower end portion of the intervention limiting portion 32 to the upper end portion.

[0025] The sum of the size of the upper end of the fixed restricting portion 31 in one direction, the size of the lower end of the intervention restricting portion 32 in one direction, and the size of the battery stack 10 in one direction is larger than the size of the upper end (opening) of the case 20 in one direction. Figure 2 As shown, even if the battery stack 10 and the insertion restriction portion 32 move upward relative to the case 20 due to vibration or the like, the insertion inclined surface 32a abuts against the fixing inclined surface 31a, thereby increasing the restraint force on the battery stack 10 in one direction. Therefore, the battery stack 10 is prevented from detaching from the case 20.

[0026] Those skilled in the art will appreciate that the above exemplary embodiments are specific examples of the following aspects.

[0027] Method 1

[0028] A power storage device, comprising:

[0029] A power storage stack including a plurality of power storage cells arranged in a row in one direction;

[0030] a shell, which is open at the top and accommodates the battery stack; and

[0031] a restricting member for restricting the battery stack from being separated upward from the casing,

[0032] The housing includes a side wall, and the side wall is arranged on the side of the battery stack in the one direction.

[0033] The limiting member has:

[0034] a fixed limiting portion, fixed to the side wall; and

[0035] an intervening restriction portion interposed between the fixed restriction portion and the battery stack,

[0036] The fixed limiting portion has a shape in which the thickness in the one direction gradually increases as it goes upward.

[0037] The intervention restricting portion has a shape in which the thickness in the one direction gradually increases as it goes downward.

[0038] In this power storage device, as the power storage stack and the insertion restriction portion move upward relative to the case, the insertion restriction portion abuts against the fixed restriction portion, thereby increasing the restraining force on the power storage stack in one direction, thereby preventing the power storage stack from being separated from the case.

[0039] Method 2

[0040] In the power storage device according to aspect 1, the intervention restriction portion is fixed to the power storage stack.

[0041] Method 3

[0042] A power storage device as described in method 1 or method 2, wherein the sum of the size of the upper end portion of the fixed limiting portion in the one direction, the size of the lower end portion of the intervention limiting portion in the one direction, and the size of the power storage stack in the one direction is larger than the size of the upper end portion of the shell in the one direction.

[0043] In addition, the embodiments disclosed this time should be considered as illustrative in all aspects and not restrictive. The scope of the present disclosure is indicated by the claims rather than the description of the embodiments above, and also includes all modifications within the meaning and scope equivalent to the claims.

Claims

1. A power storage device, wherein: have: A power storage stack including a plurality of power storage cells arranged in a row in one direction; A shell, opened at the top, accommodating the battery stack; as well as a restricting member for restricting the battery stack from being separated upward from the casing, The housing includes a side wall, and the side wall is arranged on the side of the battery stack in the one direction. The limiting member has: A fixed limiting portion, fixed to the side wall; as well as an intervening restriction portion interposed between the fixed restriction portion and the battery stack, The fixed limiting portion has a shape in which the thickness in the one direction gradually increases as it goes upward. The intervention restricting portion has a shape in which the thickness in the one direction gradually increases as it goes downward.

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

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