Integrally-formed explosion-proof membrane used on top cover of automobile lithium battery, and preparation method for explosion-proof membrane

A technology of lithium batteries and explosion-proof membranes, which is applied to battery pack parts, circuits, electrical components, etc., to achieve the effects of high industrial automation, high product qualification rate, and easy quality control

Active Publication Date: 2016-11-16
NINGBO ZHENYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the deficiencies in the prior art and provides an explosion-proof film for integrally forming on the top cover of the lithium battery of an automobile. Product safety problems caused by explosion-proof film melting or not being welded firmly

Method used

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  • Integrally-formed explosion-proof membrane used on top cover of automobile lithium battery, and preparation method for explosion-proof membrane
  • Integrally-formed explosion-proof membrane used on top cover of automobile lithium battery, and preparation method for explosion-proof membrane
  • Integrally-formed explosion-proof membrane used on top cover of automobile lithium battery, and preparation method for explosion-proof membrane

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Embodiment 1

[0039] A method for preparing an explosion-proof film integrally formed on the top cover of an automobile lithium battery, which specifically includes the following steps:

[0040] ①Upper and lower forming: Preliminarily press the entire flat cuboid lithium battery top cover, press the middle of the lower surface into an oval groove, and extrude the protruding material to the upper surface to form an oval wall 2; the initial shape of the integrally formed explosion-proof membrane product Finish.

[0041] ② Stamping forming: the outer side of the oval wall 2 of the product formed in step ① and the upper and lower sides connected to the top cover of the lithium battery have trapezoidal grooves 6 formed by pressure ribs. 0.2mm and a height of 0.6mm, the two sides of the trapezoidal groove 6 form an included angle of about 67°. It plays the role of fixing the shape of the entire explosion-proof membrane and avoids changing the shape of the explosion-proof membrane in the next pro...

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Abstract

The invention discloses an integrally-formed explosion-proof membrane used on a top cover of an automobile lithium battery, and a preparation method for the explosion-proof membrane. The explosion-proof membrane is characterized in that the overall explosion-proof membrane and the top cover of the lithium battery are manufactured and formed concurrently; the explosion-proof membrane is oval; an oval enclosure wall is arranged around the explosion-proof membrane; a protruding small enclosure wall is arranged on the lower surface, close to the lower surface of the inner edge, of the enclosure wall; a transitional small lug boss is arranged on the inner side of the enclosure wall; a pressing rib explosion-proof groove is formed in the oval part on the edge of the small lug boss; and trapezoid grooves are formed in the upper and lower surfaces, which are connected with the top cover of the lithium battery, outside the oval enclosure wall respectively. The explosion-proof membrane has the advantages that the explosion-proof membrane and the top cover of the lithium battery are manufactured and formed concurrently, so that a step of welding is omitted; and therefore, the safety problem of the product caused by melt-through of the explosion-proof membrane, or insecure welding and the like can be avoided consequently.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, more specifically, it relates to an explosion-proof film integrally formed on the top cover of the lithium battery of an automobile. Background technique [0002] With the development of modern society and the enhancement of people's awareness of environmental protection, more and more devices choose rechargeable secondary batteries as power sources, and electric vehicles are also vigorously promoted. Electric vehicles need large-capacity power batteries as power sources, and these power batteries should not only have high capacity, but also have good safety. [0003] At present, the explosion-proof membrane is mainly used in the overcharge safety protection device of automobile lithium battery on the market. The explosion-proof membrane is independently produced, and then welded to the top cover of the automobile lithium battery by laser along the periphery of the explosion-proof membrane. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M50/342
CPCH01M50/3425Y02E60/10
Inventor 蒋震林曹中伟戴麒迪
Owner NINGBO ZHENYU TECH
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