Lithium ion battery cover with explosion-proof function

Abstract

The invention discloses a lithium ion battery cover with an explosion-proof function, and the cover comprises a battery cover plate and an explosion-proof membrane arranged on the battery cover plate;a closed area is formed between the explosion-proof membrane and the battery cover plate, a sharp object is arranged in the closed area, and the sharp end of the sharp object points to the explosion-proof membrane. The technical problem that an existing battery cover is poor in anti-explosion consistency is solved; when excessive gas is generated in the battery, the explosion-proof membrane bulges outwards to touch the sharp object to be punctured, so the internal gas is released, and the battery is prevented from exploding; by adopting the scheme, the thickness of the explosion-proof membrane can be slightly thicker than that of a conventional explosion-proof membrane, on the one hand, the thickness precision of the thicker explosion-proof membrane is easier to guarantee, and the explosion-proof precision is greatly improved; on the other hand, it is ensured that the explosion-proof membrane cannot be crushed by internal gas before colliding with a sharp object, the consistency of explosion-proof indexes of the lithium ion battery can be kept, and the explosion-proof membrane has the advantages of being simple in structure and good in explosion-proof effect.

Description

technical field

[0001] The invention relates to the field of lithium ion batteries, in particular to an explosion-proof lithium ion battery cover. Background technique

[0002] At present, for lithium-ion batteries, some batteries use battery covers with explosion-proof membranes. Because the thickness of the explosion-proof membranes is relatively thin, it is difficult to maintain the same thickness after processing. If the explosion-proof membrane is too thick, the explosion-proof membrane will not be easy to open and cannot play the role of explosion-proof. Therefore, the existing lithium-ion battery cover has the problem of poor explosion-proof consistency, which cannot meet the needs of the market. Contents of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and provide a lithium-ion battery cover with an explosion-proof function, which solves the technical problem of poor explosion-proof consist...

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