Lithium battery explosion-proof safety valve

Abstract

An explosion-proof safety valve for a lithium battery, comprising a valve body (2), a filter (1) that allows gas to pass through but not liquid, a rubber cover (3) that is resistant to electrolyte corrosion, a cover (4), and a rubber sleeve The cover (3) is an inverted cylinder-shaped structure with a top-capped longitudinal section in the shape of "冂". The bottom of the valve body (2) is open, and an annular bead (21) protrudes upward in the valve inner chamber (22). The inner cavity (23) of the protruding ring (21) runs through up and down, and the lithium battery explosion-proof safety valve also includes an annular pressure ring (5), an annular pressure ring (5), a filter disc (1), and a rubber cover (3) from top to bottom The bottom is placed in the inner cavity (22) of the valve in turn, the rubber cover (3) is buckled and arranged on the annular bead (21), the cover (4) is covered on the top surface of the valve body (2), and the cover ( 4) There is a ventilation gap (41) between the bottom surface and the top surface of the valve body (2) for the valve inner cavity (22) to communicate with the outside world, and the filter (1) is provided with a groove that can be broken through if the air pressure is higher than the set value bottom annular groove (11). Its advantages are: sensitive response to pressure, high adaptability and good explosion-proof effect.

Description

technical field [0001] The invention relates to the technical field of safety valves, in particular to an explosion-proof safety valve for lithium batteries. Background technique [0002] An existing Chinese utility model patent with the application number CN200420036403.3 titled "Maintenance-free valve-regulated sealed lead-acid battery safety valve" discloses a maintenance-free valve-regulated sealed lead-acid battery safety valve. There is a microporous acid filter sheet made of plastic in the breather pipe, and there is a burst-proof sheet in the upper opening of the valve body. Due to the addition of acid filter sheets and explosion-proof sheets, the gas discharged from the exhaust valve body is filtered and flow-limited, and open flames are prevented from entering the valve, thereby improving the anti-explosion and anti-acid mist performance of the safety valve. According to the Chinese People's According to the inspection method stipulated in the communication indust...

AI Technical Summary

Problems solved by technology

But its disadvantage is that the lower pressure limit of the explosion-proof disk is relatively high, and it loses the explosion-proof effect in the occasion where it needs to respond sensitively to the pressure, so its structure still needs to be improved.

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