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Safety valve for lithium ion power battery

A power battery and safety valve technology, applied in the mechanical field, can solve the problems of unusable and scrapped batteries, and achieve the effect of preventing battery leakage, preventing leakage, and ensuring reliability and practicality

Inactive Publication Date: 2013-06-26
ZHEJIANG GODSEND POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And when this type of safety valve is opened, the battery will also be scrapped and can no longer be used

Method used

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  • Safety valve for lithium ion power battery
  • Safety valve for lithium ion power battery
  • Safety valve for lithium ion power battery

Examples

Experimental program
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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, a safety valve for a lithium-ion power battery is provided with a cylindrical mounting groove 2 on a plastic injection-molded battery cover plate 1. The top of the mounting groove 2 is open and the bottom is provided with an exhaust hole 7. The mounting groove 2 and the Lithium ions communicate with each other through vent holes 7 .

[0020] The valve cover 3 and the spring 5 are arranged in the installation groove 2 , wherein the valve cover 3 is provided with an air outlet 4 , and the side wall of the valve cover 3 is threadedly connected with the upper side wall of the installation groove 2 .

[0021] The spool 6 is integrally formed, and its material is nitrile rubber, styrene-butadiene rubber, fluororubber, ethylene-propylene rubber or butyl rubber. Such as figure 2 , the spool 6 includes three parts from top to bottom: a cyli...

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Abstract

The invention relates to a safety valve for a lithium ion power battery. Currently used safety valve is usually a thin metal sheet disposed on an end cover, and is discarded with the opening of a battery. According to the invention, a mounting groove is disposed on an injection-molded battery cover plate, and an exhaust vent is opened at the bottom of the mounting groove. A valve cover and a spring are disposed in the mounting groove, wherein an air outlet is opened on the valve cover, and the side wall of the valve cover is in threaded connection with the upper side wall of the mounting groove. A valve core comprises, from up to down, the following three parts in turn: a spring positioning pin, a sealing sheet, and an adjusting pin for an inverted truncated cone body. The upper end of the spring is in movable connection with the bottom surface of the valve cover, and the upper end of the spring is in movable connection with the sealing sheet part. The safety valve of the invention has recoverable functions, can greatly improve the safety of a lithium ion battery, prevents shell-expansion phenomenon of the battery, and effectively prolongs the service life of the battery.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a valve, in particular to a safety valve for a lithium-ion power battery. Background technique [0002] In recent years, with the increasingly serious energy crisis and global environmental problems, the development and application of new energy has become a global upsurge. Lithium-ion power batteries using lithium iron phosphate as the positive electrode material are regarded as electric vehicles, hybrid vehicles, etc. The best energy source for new energy vehicles is developing rapidly. [0003] With the advancement of lithium-ion battery technology and the emergence of new materials, the safety of lithium-ion batteries is much higher than that of previous lithium-ion batteries. Therefore, lithium-ion batteries are becoming more and more large-scale. In particular, lithium-ion batteries for electric vehicles generally use large prismatic batteries. However, at present, the el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/12
CPCY02E60/10
Inventor 郑劼黄辉周晓政胡益兰孙建平繆东栋倪九江
Owner ZHEJIANG GODSEND POWER TECH
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