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Method for forming battery case cover and explosion-proof valve of battery case cover

A technology for battery shells and explosion-proof valves, which is applied to batteries, battery pack components, circuits, etc., can solve problems such as unstable pressure of explosion-proof valves, and achieve reliable cracking effects

Inactive Publication Date: 2016-08-03
KOBE STEEL LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This thinning portion is partially or partially generated in the extending direction of the breaking groove 21. Therefore, depending on the degree of generation and the place where it occurs, the wall thickness (plate thickness) of the breaking groove 21 is partially reduced, and there is a problem of the explosion-proof valve. When the operating pressure is unstable and cannot be used as an explosion-proof mechanism that reliably cracks before it breaks

Method used

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  • Method for forming battery case cover and explosion-proof valve of battery case cover
  • Method for forming battery case cover and explosion-proof valve of battery case cover
  • Method for forming battery case cover and explosion-proof valve of battery case cover

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Embodiment Construction

[0039]Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in this specification and drawings, the same code|symbol is attached|subjected to the structural element which has substantially the same functional structure, and repeated description is abbreviate|omitted.

[0040] figure 1 , 2 Each embodiment of the battery case cover of the present invention is shown respectively, the upper side shows an overall perspective view, and the lower side shows a partial cross-sectional view thereof. Such as figure 1 , 2 As shown, the battery case cover 1 of the present invention is formed by forming an aluminum alloy thin plate with a certain thickness by press working, and has a flat plate shape as a whole.

[0041] Here, for the cover of the casing of the lithium ion secondary battery as the power source of the mobile phone, notebook personal computer or automobile, etc., the aluminum alloy thin plate...

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Abstract

PROBLEM TO BE SOLVED: To provide a battery case lid having an explosion-proof mechanism to be surely cleaved, capable of accurately processing a thin recessed groove for rupture of a lid made of an aluminum alloy, and also to provide a method for forming an explosion-proof valve of the battery case lid.SOLUTION: When a thinner recessed groove 4 for rupture is provided to a thin flat recess 3 by coining processing as an explosion-proof valve 2 of a battery case lid made of an aluminum alloy, a recessed groove 5 for assisting molding of the recessed 4 for rupture, which is thicker than the recessed groove 4 for rupture but thinner than the flat recess 3, is further provided after being simultaneously processed by coining.

Description

technical field [0001] The present invention relates to a method for forming a battery case cover and an explosion-proof valve of the battery case cover. The battery case cover has an explosion-proof valve (explosion-proof mechanism) that releases the internal pressure when a predetermined internal pressure is applied. Background technique [0002] Lithium-ion secondary batteries are widely used as power sources for mobile phones, notebook personal computers, and the like. Metals are often used for the plates constituting the battery case, including the lid. Patent Documents 1 to 3 disclose battery cases using iron alloys such as SUS, and Patent Documents 4 to 7 disclose battery cases using aluminum alloys. body. In particular, when the cover, the main body, and the like of the battery case are made of an aluminum alloy plate material, it is also advantageous in terms of corrosion resistance, weight reduction, workability, and cost. [0003] The internal pressure of the ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/12H01M2/02H01M2/04
CPCY02E60/10H01M2220/30
Inventor 小西晴之
Owner KOBE STEEL LTD
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