A kind of anti-clogging explosion-proof valve and preparation method thereof

Abstract

The invention discloses an anti-clogging explosion-proof valve, which comprises a piston, a valve body, a spring and a connecting shaft, a first through hole is arranged through the connecting shaft, and a protective device is installed on the valve body around the outside of the spring. cover; the valve body includes a number of first leak gaps corresponding to the protective cover, and the cavity between the first leak gap and the protective cover forms a first air hole; the piston includes a piston body, a breathable diaphragm and the upper cover, a second through hole is provided longitudinally through the piston body corresponding to the first through hole, and a plurality of through grooves are connected horizontally through the second through hole, and the cavity between the through groove and the upper cover Forming the second air hole; the invention also discloses a preparation method of an anti-clogging explosion-proof valve. In the present invention, a protective cover is arranged on the outside of the spring to effectively prevent combustion eruptions from accumulating and adhering to the spring to shorten the compression stroke of the spring, thereby avoiding affecting the opening effect of the explosion-proof valve and the efficiency of exhaust and pressure relief.

Description

technical field [0001] The invention relates to the technical field of explosion-proof valve production, in particular to an anti-clogging explosion-proof valve and a preparation method thereof. Background technique [0002] As the core of new energy electric vehicles, the power battery pack is very important for its safety and reliability. In order to ensure its safe and stable operation, the battery needs to be waterproof and dustproof, that is, the battery pack needs to meet the sealing requirements. However, in a fully sealed state, once the battery has abnormal thermal runaway such as short circuit, overcharge or overdischarge, high temperature and high pressure gas will be generated, and a large amount of solid combustion eruptions containing solid or colloidal substances will be generated. If the combustion eruption cannot be discharged in time Usually, violent fires and explosions will occur, resulting in heavy casualties and property losses. The current common pra...

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Problems solved by technology

[0003] Most of the existing technologies are spring-controlled explosion-proof valves. Their working principle is to rely on precision springs to control the opening of the explosion-proof valve core to exhaust and relieve pressure. It has the advantages of high explosion-proof pressure accuracy and convenient pressure adjustment according to needs. When the battery pack explodes, the accumulation of combustion eruptions and adhesion to the spring will have a certain impact on the opening stroke of the explosion-proof valve core, resulting in a partial decrease in the opening height of the valve core in the later period compared with the previous period, thus affecting the exhaust and pressure relief speed of the explosion-proof valve , and will lead to pressure relief, the valve core can not completely return to the original position for re-sealing, waterproof

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