Lithium-ion battery for forced internal short test and preparation method thereof

Abstract

A lithium-ion battery for a forced internal short-circuit test, comprising a lithium-ion battery core, a short-circuit metal piece, a positive pole tab, a negative pole tab, and a sealing packaging film. The lithium-ion battery core includes a positive pole, a negative pole and a diaphragm spaced between the positive pole and the negative pole. The lithium-ion battery core has been removed from the outer packaging and is fully charged. The short-circuiting metal piece is entangled in the lithium-ion battery cell. The positive pole tab and the negative pole tab are welded on the lithium-ion battery core and electrically connected to the positive pole and the negative pole respectively. The sealed packaging film seals the lithium-ion battery core and vacuumizes it, so that the short-circuit metal parts form convex marks on the sealed packaging film. The above-mentioned lithium-ion battery used in the forced internal short test is sealed and packaged with a sealed packaging film to ensure that the electrolyte does not leak. At the same time, after vacuum treatment, the short-circuit metal parts form a convex mark on the sealed packaging film, and the placement position is relatively obvious. . The invention also provides a preparation method of the lithium ion battery for the forced internal short test.

Description

【Technical field】 [0001] The invention relates to a lithium ion battery and a preparation method thereof, in particular to a lithium ion battery for a forced internal short test and a preparation method thereof. 【Background technique】 [0002] In recent years, lithium-ion batteries, as a new force in the battery industry, have received more and more attention from the industry. Whether it is used in ordinary small communication devices such as mobile phones, or in mobile devices such as digital products, or in power equipment such as electric tools and pure battery vehicles, the use of lithium-ion batteries is getting larger and larger. more popular with consumers. [0003] With the birth of lithium-ion batteries, safety issues have always been concerned by people. As a battery manufacturing enterprise and research institution, it is very important and necessary to establish strict safety testing methods and inspection standards. Japan is leading the world in the research...

AI Technical Summary

Problems solved by technology

However, after the lithium-ion battery used in this safety test method is involved in the short-circuit metal parts, its position is difficult to find, and the electrolyte of the lithium-ion battery is easy to volatilize and leak

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