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Cell case

一种电池壳体、壳体的技术，应用在电池、二次电池、电池组零部件等方向，能够解决内部压力上升等问题，达到工作压力稳定化、操作容易、提高强度的效果

Active Publication Date: 2015-11-18
SOODE NAGANO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a secondary battery, when hydrogen gas is generated inside the battery case due to a bad condition, there is a possibility that the internal pressure rises to an abnormal level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0041] (The overall structure of the battery case)

[0042] figure 1 It is a perspective view showing the appearance of the battery case 1 according to Embodiment 1 of the present invention, and shows how the battery case 1 is disassembled into a case main body 10 and a cover 2 .

[0043] Such as figure 1 As shown, the battery case 1 of this form has: a flat box-shaped case body 10 in the shape of a cuboid; and a plate-shaped cover 2 that closes the opening of the case body 10. Manufactured by processing such as metal plate pressurization. In this embodiment, both the case main body 10 and the cover 2 are manufactured by processing such as pressing an aluminum alloy plate material having a thickness of 0.3 mm to 3.0 mm. In addition, the case main body 10 and the cover 2 can also be manufactured by performing processing such as pressurization on other metal plate materials such as copper or iron.

[0044] Electrodes (not shown) for a secondary battery such as a lithium io...

Embodiment approach 2

[0091] (Structure of battery case 1x and safety valve 4x)

[0092] Figure 8It is a perspective view showing the appearance of the battery case 1x according to Embodiment 2 of the present invention, and shows how the battery case 1x is disassembled into a case main body 10 and a cover 2 . Figure 9 It is explanatory drawing of the cover 2 of the battery case 1x in Embodiment 2 of this invention, Figure 9 (a), (b) are the plan view of the cover 2, and the enlarged plan view of the safety valve 4x formed in the cover 2, respectively. Figure 10 is a cross-sectional view of the safety valve 4x of the battery case 1x according to Embodiment 2 of the present invention, Figure 10 (a), (b), (c) are respectively Figure 9 (b) A-A' sectional view, BB' sectional view and CC' sectional view. In addition, since the battery case 1x of this embodiment has the same basic structure as the battery case 1 of Embodiment 1, the same code|symbol is attached|subjected to a common part, and de...

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PUM

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Abstract

　A cell case provided with a safety valve (4) in which a breakage groove (45) is used, wherein in order to stabilize the operation pressure, a lid (2) of the cell case has formed thereon: a thin plate portion (30) obtained by thinning a plate part (3); and a first recessed part (40) comprising a curved part (44) in which the thin plate portion (30) is indented inward, with respect to the case, in a curved shape. The breakage groove (45) for the safety valve (4) is formed at the bottom part (440) of the curved part (44). A first connecting portion (46) and a second connecting portion (47) of the plate part (3), which connect to the curved part (44) on both sides flanking the curved part (44), are at positions protruding toward the outside of the case from the plate part (3).

Description

technical field [0001] The present invention relates to a battery case having a safety valve that relieves internal pressure when the internal pressure rises. Background technique [0002] In a secondary battery such as a lithium ion secondary battery, electrodes, an electrolytic solution, and the like are housed inside a battery case. In such a secondary battery, when hydrogen gas is generated inside the battery case due to a defect, the internal pressure may rise to an abnormal level. Therefore, a breaking groove is formed in the battery case in advance, and when the internal pressure of the battery case rises, a safety valve is installed to release the internal pressure by breaking the breaking groove (see Patent Document 1). [0003] In the battery case described in Patent Document 1, a concave portion having a trapezoidal cross-section and an oblong planar shape is formed in advance on the bottom surface of the battery case, and a breaking groove portion is annularly f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M2/04H01M50/159
CPCH01M2/0473H01M2/0486H01M2/1241H01M10/0525H01M10/058Y02E60/10H01M50/15H01M50/3425Y02P70/50H01M50/159H01M2200/20
Inventor 金森圭治野村伸一森山庆彦早出隆幸杉山幸德
Owner SOODE NAGANO
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