Anti-blocking explosion-proof valve and preparation method thereof

Abstract

The invention discloses an anti-blocking explosion-proof valve which comprises a piston, a valve body, a spring and a connecting shaft. A first through hole is formed in a connecting shaft in a penetrating mode, and a protective cover is installed on the valve body around an outer side of the spring. The valve body comprises a plurality of first air leakage gaps corresponding to the protective cover, and first air holes are formed in a cavity between the first air leakage gaps and the protective cover. The piston comprises a piston body, a breathable membrane and an upper cover, a second through hole longitudinally penetrates through the piston body and corresponds to the first through hole, a plurality of through grooves horizontally penetrate through the second through hole and are connected with the second through hole, and second breathable holes are formed in cavities between the through grooves and the upper cover. The invention further discloses a preparation method of the anti-blocking anti-explosion valve. According to the anti-blocking explosion-proof valve, the protective cover is arranged on the outer side of the spring such that combustion eruption objects are effectively prevented from accumulating and adhering to the spring to shorten the compression stroke of the spring, and the opening effect and the exhaust pressure relief efficiency of the explosion-proof valve are prevented from being affected.

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...

AI Technical Summary

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

Images