Injection hole structure capable of improving thermal shock test of square lithium ion battery

Abstract

The invention discloses an injection hole structure capable of improving a thermal shock test of a square lithium ion battery. An injection hole in a cover plate of the battery is sealed by using an LDPE high polymer material, so that the injection hole in the battery is in a closed state at low temperature, and a good sealing effect can be achieved; the injection hole is in an open state at high temperature, gas and heat inside the battery outflow from the injection hole, and the phenomenon of short circuit of the battery is inhibited. According to the injection hole structure, the sealing property of the injection hole can be guaranteed, liquid leakage of the battery is avoided, the problems, such as battery fire and explosion, caused by thermal abuse, of the battery are also solved, the using performance and safety performance of the battery are effectively guaranteed, and the injection hole structure has great production practical significance.

Description

technical field [0001] The invention relates to a liquid injection hole structure for improving thermal shock testing of a square lithium-ion battery, belonging to the technical field of lithium-ion batteries. Background technique [0002] With the development of science and technology, the energy density of lithium-ion batteries is getting higher and higher, and its safety has attracted more and more attention. In actual situations, when lithium batteries are thermally abused, local short circuits will occur inside, and there is a danger of fire and explosion. Some prevent battery failure by using high-performance and powerful diaphragms such as ceramic diaphragms, but the above technologies either have poor consistency, complex structures, or are difficult to manufacture and expensive. Contents of the invention [0003] In view of this, the present invention aims to provide a square lithium-ion battery liquid injection hole structure with simple structure, convenient op...

AI Technical Summary

Problems solved by technology

In actual situations, when lithium batteries are thermally abused, local short circuits will occur inside, and there is a danger of fire and explosion. Some prevent battery failure by using high-performance and powerful separators such as ceramic separators, but the above technologies either have poor consistency, complex structures, or are difficult to manufacture and costly.

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