Safety valve for lithium ion battery

A lithium-ion battery and safety valve technology, applied in the field of machinery, can solve problems such as unusable battery and scrapped battery, 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 battery

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, a safety valve for a lithium-ion 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 6. The mounting groove 2 is connected to the lithium-ion battery. The interior of the ion battery is communicated through the vent hole 6, and the vent hole 6 and the bottom surface of the installation groove 2 are transitioned through a conical surface.

[0018] The valve cover 3 and the valve core 5 are arranged in the installation groove 2, wherein the valve cover 3 includes an upper cylindrical part and a lower cylindrical part coaxially formed in one piece, the end face diameter of the upper cylindrical part is larger than the end face diameter of the lower cylindrical part, and the valve cover 3. The ...

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Abstract

The invention relates to a safety valve for a lithium ion battery. At present, the used safety valve is generally a thin metal sheet arranged on an end cover, and the safety valve is discarded once the battery is opened. In the safety valve provided by the invention, a battery cover plate subjected to injection molding is provided with an installation groove; the bottom of the installation grooveis provided with a vent hole; a valve cover with a T-shape section and a valve core are arranged in the installation groove; the valve cover is in threaded connection with the installation groove; the valve cover is provided with an air outlet hole along the axial direction; the bottom surface of the valve cover is provided with a groove; and the valve core is a rubber ball and is arranged between the groove of the bottom surface of the valve cover and the conical surface of the vent hole. The safety valve in the invention has a restorable function, thereby greatly improving the safety of thelithium ion battery, preventing the shell of the battery from protruding and effectively prolonging 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 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 electrol...

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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