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

Abstract

The invention discloses a lithium-ion battery for a forced internal short-circuit test. The lithium-ion battery comprises a lithium-ion battery core, a short-circuit metal part, a positive pole tab, a negative pole tab and a sealing packaging film. The lithium-ion battery core comprises a positive pole, a negative pole and a diaphragm sandwiched between the positive pole and the negative pole. An outer packing of the lithium-ion battery core is removed and the lithium-ion battery core is fully charged. The short-circuit metal part is drawn into the lithium-ion battery core. The positive pole tab and the negative pole tab are welded to the lithium-ion battery core and are electrically connected respectively to the positive pole and the negative pole. The sealing packaging film seals the lithium-ion battery core and a vacuum-pumping process is carried out so that the a convex imprint of the short-circuit metal part is formed on the sealing packaging film. The lithium-ion battery for a forced internal short-circuit test has the advantages that the sealing packaging film is used for sealing packaging; the leakage of an electrolyte is avoided; and after vacuum treatment, a convex imprint of the short-circuit metal part is formed on the sealing packaging film and the short-circuit metal part is located at an obvious position. The invention also discloses a preparation method of the lithium-ion battery for a forced internal short-circuit test.

Description

【Technical field】 [0001] The invention relates to a lithium electronic battery and a preparation method thereof, in particular to a lithium electronic 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 i...

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

Images