Explosion-proof valve capable of carrying out humidity management and application thereof

Abstract

The invention discloses an explosion-proof valvecapable of carrying out humidity management. The explosion-proof valve comprises a valve body, a reversible adsorption core body, a diaphragm valve, a breathable film and a spring valve are arranged on an internal and external air circulation path of the valve body, and air on the inner side of the valve body passes through the reversible adsorptioncore body and is exhausted out of the valve body from the diaphragm valve to form a moisture exhaust path; and the spring valve comprises an umbrella cover plate, a connecting rod and a spring, the umbrella cover plate is connected with one end of the connecting rod, the spring is coaxially arranged on the connecting rod, initial compression force for ensuring sealing of the spring valve is arranged on the spring, and when internal pressure is increased, the internal pressure can form outward thrust on the umbrella cover plate and is transmitted to the spring through the connecting rod, and the spring is compressed while the umbrella cover plate is opened outwards, so as to form internal and external air straight-through paths. By means of the mode, condensation can be effectively controlled, balance of internal pressure and external pressure is kept, and when the internal pressure exceeds a set limit value, the spring valve is driven by the internal pressure to be opened outwards, internal air and external air are directly communicated, so that the rapid pressure relief effect is achieved.

Description

technical field [0001] The invention relates to an explosion-proof valve capable of humidity management and its application. Background technique [0002] The battery is the most critical component of a new energy vehicle. During the operation of the battery pack, the internal pressure will change due to the increase and decrease of the internal temperature. It is necessary to balance the internal and external pressure of the battery pack to ensure the normal operation of the battery pack; when the battery pack When the internal components are abnormal, the internal pressure increases sharply and exceeds the safety limit, which affects the safety of the battery. Therefore, the sharply increased pressure needs to be released quickly; in addition, the existing pressure balance valve cannot prevent external humid air from entering the casing. When the humidity inside the casing reaches the dew point, condensation will occur, which will affect the normal operation of the battery...

AI Technical Summary

Problems solved by technology

[0002] The battery is the most critical component of a new energy vehicle. During the operation of the battery pack, the internal pressure will change due to the rise and fall of the internal temperature. It is necessary to balance the internal and external pressure of the battery pack to ensure the normal operation of the battery pack; when the battery pack When the internal components are abnormal, the internal pressure increases sharply and exceeds the safety limit, which affects the safety of the battery. Therefore, the sharply increased pressure needs to be released quickly; in addition, the existing pressure balance valve cannot prevent external humid air from entering the casing. Condensation will occur when the humidity inside the case reaches the dew point, which will affect the normal operation of the battery pack

[0003] In the existing technology, in order to solve the problem of fogging and condensation, many manufacturers use desiccant packages such as silica gel, calcium chloride, and bentonite in the battery pack. The desiccant packages such as silica gel, calcium chloride, and bentonite are characterized by one-time use and irreversibility. , the life of dry agglomeration is short, and the desiccant needs to be replaced after 1 to 2 months of failure, and the battery pack is large, requiring multiple desiccant packs, which occupies a large space in the battery pack and touches the electrical parts in the battery pack During the operation of the equipment, the package is scattered due to external shock and vibration, which will increase the after-sales maintenance cost and cause safety hazards to users.

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