A kind of explosion-proof valve with waterproof, breathable and moisture-proof function and realization method thereof

Abstract

The invention discloses an explosion-proof valve with waterproof, breathable, and moisture-resistant functions and a realization method. The explosion-proof valve comprises a piston, a valve body, a spring, and a two-way constant pressure breathable valve. The piston penetrates the middle of the valve body and is sheathed with a spring. It is threadedly connected with the two-way constant pressure breathable valve; a protective cover is installed on the valve body around the spring and the outside of the two-way constant pressure and breathable valve. There is a gap between the protective cover and the valve body, and the end of the protective cover away from the valve body is the sealing end. The invention integrates explosion-proof pressure relief, moisture resistance and ventilation, and can effectively prevent the occurrence of electrical short-circuit and other faults in the battery pack caused by the phenomenon of water condensation.

Description

technical field [0001] The patent of the present invention mainly relates to the technical field of explosion-proof valves, in particular to an explosion-proof valve with functions of waterproof, breathable, and moisture-proof and its realization method. Background technique [0002] The power battery pack is the "heart" of the new energy vehicle. As the core component of the new energy electric vehicle, its safety, stable operation and reliability directly affect the vehicle performance and driving safety of the new energy electric vehicle. In order to prevent the performance of the battery pack and control system in the battery pack from being affected by water, dust, etc., the power battery pack needs to be sealed, but in the case of complete sealing, the internal cells of the power battery will be charged, discharged and operated under different working conditions. Heat is generated, causing the gas inside the power battery box to expand; when the temperature drops when ...

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Problems solved by technology

[0004] (1) A metal or plastic explosion-proof disk with a score is used as the explosion-proof component. When a certain pressure is reached, the explosion-proof disk ruptures to release the pressure. However, under normal working conditions, the sealed box is completely airtight, and the inside and outside of the box will be damaged after the temperature changes. The pressure is unbalanced, which in turn affects the reliability and service life of the battery, and the bursting pressure of the explosion-proof disc is generally high, which makes the pressure range during the bursting large and the accuracy is poor. There are still certain defects in this technical product;

[0005] (2) The main frame and protective cover of the explosion valve are made of metal materials, and a waterproof and breathable membrane is installed in the frame, and the structure of the cone-bottom thimble is used to pierce the membrane, which has the effect of ventilation and explosion protection to a certain extent, but its structure is relatively complicated. , the explosion-proof is achieved by the deformation of the air-permeable membrane (air-permeable paper) under pressure and the protrusion is pierced by the conical thimble. nature, the product is damaged and loses its function after the diaphragm is punctured), and the process and delivery cannot be fully inspected, so there is a large quality risk

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