Anti-overcharging battery cover plate

Abstract

The invention provides an anti-overcharging battery cover plate, comprising a cell cover plate main body and a bottom insulating plate, which are overlapped one above the other, and further comprising a positive terminal and a negative terminal which are arranged on two sides of the cell cover plate main body; the positive terminal comprises a positive upper conducting strip, a positive insulating plate and a positive lower conducting strip, which are overlapped in sequence; the positive upper conducting strip and the positive lower conducting strip get conductivity through a rupture disk; the rupture disk is capable of disconnect the positive upper conducting strip from the positive lower conducting strip when pressure inside a battery is over high. According to the anti-overcharging battery cover plate, the rupture disk is added to the positive terminal to play a role of current conductivity; moreover, when pressure inside the battery is over high, the rupture disk at the position of the positive terminal is capable of cutting off power supply of the battery, thus achieving the current cutoff function when the battery expands abnormally. The anti-overcharging battery cover plate has the characteristics of simple structure, reliable performance and capability of ensuring overcharging safety of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to an overshoot-proof battery cover plate. Background technique [0002] At present, there is basically no anti-overcharge structure on the cover plate of the aluminum-shelled square battery. Most of the anti-overcharge methods for the battery are to add electrolyte additives or use safer LFP materials as the positive electrode material of the battery, and the energy efficiency is not high. [0003] With the development of ternary, there are some anti-overcharge cover plates. The principle is mainly the short-circuit structure, which does not completely block the current, and there are hidden dangers in battery safety. In addition, these structures require a large space, and the production cost and process complex. Contents of the invention [0004] In order to solve the problem of safety in use of square aluminum shell batteries and overcharge safety of the b...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of safety in the use of square aluminum shell batteries and the safety of battery overcharge, the present invention provides an anti-overcharge battery cover that can cut off the battery loop current, which greatly improves the safety performance and overcharge prevention ability of the battery.

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