Balanced moisture absorption anti-explosion valve for ternary lithium power battery pack

Abstract

The present invention discloses a balanced moisture absorption anti-explosion valve for a ternary lithium power battery pack. An end cover is arranged on an internal and external gas circulation path, an ejector rod assembly is connected with the end cover, and blasting internal force is the driving force of the ejector rod assembly. A reset elastic part is arranged between the ejector rod assembly and a shell and is used for resetting the ejector rod assembly; a protective cover is fixedly connected with the shell, and a balance valve comprises at least two stages of gas circulation channels from outside to inside. A film with bidirectional conduction performance is arranged on a gas circulation path of the first-stage channel, the opening and closing of the second-stage channel are controlled by at least two umbrella valves, the adjacent umbrella valves are arranged in an up-and-down staggered manner, and a moisture absorption assembly is arranged close to the second-stage channel. According to the mode, the two independent modules are used for acting in the out-of-control state and the normal state of the battery pack respectively, the internal pressure and the external pressure can be balanced in time under the out-of-control condition, the explosion-proof function is achieved, the internal pressure and the external pressure can be kept balanced under the normal working state, and the dehumidification and moisture absorption functions are achieved.

Description

technical field [0001] The invention relates to a balanced moisture absorption explosion-proof valve for a ternary lithium power battery pack. Background technique [0002] When the battery is impacted or short-circuited, a large amount of gas will be generated inside the battery, so the battery pack is equipped with an explosion-proof valve, but most of the explosion-proof valves used in the current battery pack do not have the function of controlling the pressure of air in and out, and the safety performance cannot be guaranteed. Assured, the hazard level remains high. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a balanced moisture-absorbing explosion-proof valve for ternary lithium power battery packs, which can use two independent modules to function under the out-of-control and normal states of the battery pack, and can not only have explosion-proof It can also effectively dehumidify and absorb moistur...

AI Technical Summary

Problems solved by technology

[0002] When the battery is impacted or short-circuited, a large amount of gas will be generated inside the battery, so the battery pack is equipped with an explosion-proof valve, but most of the explosion-proof valves used in the current battery pack do not have the function of controlling the pressure of air in and out, and the safety performance cannot be guaranteed. Assured, hazard level remains high

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