Anti-blocking explosion-proof valve and preparation method thereof

An explosion-proof valve and anti-clogging technology, which is applied in the direction of electrical components, circuits, battery pack components, etc., can solve the problems of affecting the exhaust and pressure relief speed of explosion-proof valves, the impact of explosion-proof valve core opening strokes, and the reduction of valve core opening heights, etc. , to achieve the effect of avoiding short circuit or other accidents, balancing internal and external pressure, improving exhaust capacity and effect

CN111490212AActive Publication Date: 2020-08-04DONGGUAN PUW EPTFE MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-08-04

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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.
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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...

Examples

Embodiment 1

[0047] Embodiment 1: see Figure 1 to Figure 6 , an anti-clogging anti-explosion valve provided in this embodiment, which includes a piston 1, a valve body 2, a spring 3, and a connection that passes through the spring 3 and the valve body 2 in turn and is connected to the piston 1. The shaft 4 is provided with a first through hole through the connecting shaft 4, and a protective cover 5 is installed on the valve body 2 around the outside of the spring 3, and the end of the protective cover 5 away from the valve body 2 is The sealing end; specifically, the piston 1 and the connecting shaft 4 are threadedly connected, and the protective cover 5 is installed on the valve body 2 by means of interference fit or pressure riveting connection. According to the requirements of different explosion-proof valve products , flexible selection of the protective cover 5 of different dimensions, since the spring 3 and the connecting shaft 4 are included in the protective cover 5, the protecti...

Embodiment 2

[0068] Example 2: see Figure 7, the content of this embodiment is roughly similar to that of Embodiment 1, the difference is that the protective cover 5 is also provided with a flange 52, and the valve body 2 is provided with a flange fixing protrusion corresponding to the flange 52; After the protective cover 5 is installed on the valve body 2, the flange fixing protrusion fixes and presses the flange 52 by means of pressure riveting, so as to prevent the protective cover 5 from rotating and falling off, and effectively improve the firmness of the installation , low processing cost, and convenient for industrialized mass production.

Embodiment 3

[0069] Embodiment 3: see Figure 8 , the content of this embodiment is roughly similar to that of Embodiment 1, the difference is that there are four installation parts 6 in total, and the four installation parts 6 are respectively extended and arranged on the outside of the valve body 2 at intervals, and An annular airtight tooling groove 7 is arranged on the upper ring of the valve body 2 .