Anti-explosion valve for lithium ion battery

Abstract

The invention provides an anti-explosion valve for a lithium ion battery. The anti-explosion valve for the lithium ion battery comprises an anti-explosion substrate and an anti-explosion sheet; the anti-explosion sheet is arranged in the anti-explosion substrate; the anti-explosion sheet comprises an anti-explosion sheet I and an anti-explosion sheet II; the edge I of the anti-explosion sheet I and the edge II of the anti-explosion sheet II are connected with the anti-explosion substrate respectively; an explosion line I and an explosion line II are arranged on the inner wall of the anti-explosion substrate; gaps are reserved between the two ends of the explosion line I and the two ends of the explosion line II correspondingly; and an explosion line III is arranged between the explosion line I and the explosion line II. The anti-explosion valve for the lithium ion battery is provided with the anti-explosion sheet, the explosion line I, the explosion line II and the explosion line III, so when the internal pressure of the lithium ion battery is excessive, the explosion line I, the explosion line II and the explosion line III are broken, the anti-explosion sheet I and the anti-explosion sheet II are exploded outwards in a window opening mode, and the stress required by the explosion mode is smaller and the pressure is relieved more quickly; in addition, one side edge of each of the anti-explosion sheet I and the anti-explosion sheet II is connected with the anti-explosion substrate, and the anti-explosion sheet I and the anti-explosion sheet II do not fly out in the explosion process, so that the safety performance is higher.

Description

technical field [0001] The invention relates to the field of explosion-proof valves, in particular to an explosion-proof valve for lithium ion batteries. Background technique [0002] Due to improper use of lithium-ion batteries, when the battery is overcharged or has other failures, a large amount of gas will be produced inside it due to chemical reactions, resulting in a rapid increase in the internal pressure of the battery and an explosion accident. Therefore, in order to prevent such dangers, batteries are generally equipped with explosion-proof devices. see figure 1 , the currently commonly used explosion-proof valve 100 for lithium-ion batteries includes an explosion-proof substrate 110 and four explosion-proof sheets 120 uniformly arranged in the explosion-proof substrate 110, but the current commonly used explosion-proof valve 100 for lithium-ion batteries has a relatively high blasting exhaust velocity. slow. Contents of the invention [0003] Based on this, i...

AI Technical Summary

Problems solved by technology

see figure 1 , the currently commonly used explosion-proof valve 100 for lithium-ion batteries includes an explosion-proof substrate 110 and four explosion-proof sheets 120 uniformly arranged in the explosion-proof substrate 110, but the current commonly used explosion-proof valve 100 for lithium-ion batteries has a relatively high blasting exhaust speed. slow

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