Battery overcharge protection structure and battery cover

Abstract

The invention provides a battery overcharge protection structure and a battery cover. The battery overcharge protection structure is arranged on a cover plate of the battery and is provided with an overturning body capable of overturning on the cover plate; the overturning body is fixedly arranged on the cover plate; at least one bursting groove is formed in the overturning body; the value of thebursting pressure, positioned at the position of the blasting groove, of overturning body is higher than the overturning pressure value of the overturning body; when the internal pressure of the battery reaches the overturning pressure value, the overturning body can overturn to enable the external circuit of the battery to be shortcircuited to release battery core energy, so that the battery stops work; after the internal pressure of the battery is continuously increased and reaches the bursting pressure value, the bursting groove in the overturning body bursts to leak pressure; and by the mode of arranging the bursting groove in the overturning body and on the basis of integrating the overturning function and the bursting function, the size is reduced, the cover plate structure is simplified, the welding process of the explosion-proof sheet is reduced and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a battery overcharge protection structure and a battery cover with the battery overcharge protection structure. Background technique [0002] Due to its high energy, high capacity and high power, power batteries have been widely used in electric vehicles and energy storage power stations. For power batteries, due to their high energy and high activity, they tend to catch fire and explode when overcharged. For this reason, power batteries should also have good safety performance and long cycle life, etc., in order to meet the use standards and satisfy people's demands. [0003] At present, a power battery usually includes a casing, a cover plate, and a battery cell, etc., wherein the battery cell is placed inside the casing, the upper end of the casing has an opening, and the cover plate seals the opening at the upper end of the casing. The electrode terminals on the boa...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects of large size and complicated structure caused by the bursting and power-off protection functions of the power battery in the prior art, which are realized separately by the bursting disc and the flipping disc.

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