Inside and outside air pressure balance method and device used for sealed high-pressure battery pack of electric vehicle

Abstract

The application discloses an air pressure balance device used for a sealed high-pressure battery pack of an electric vehicle. The air pressure balance device comprises an elastic seal cover and a protective casing, wherein the elastic seal cover is arranged outside a battery pack casing of the sealed high-pressure battery pack of the electric vehicle; the elastic seal cover is sleeved by the protective casing; the elastic seal cover comprises an elastic corrugated structure tube wall, one side of the elastic seal cover is sealed, and a first mounting flange face is arranged on the opening side of the elastic seal cover, and is hermetically connected with the battery pack casing; the protective casing comprises a second mounting flange face which is pressed onto the first mounting flange face and then is fixedly connected with the battery pack casing. In the application, the sealed high-pressure battery pack is completely sealed and separated by the elastic seal cover, so that even if the pressure inside the sealed high-pressure battery pack is decreased, water outside the elastic seal cover cannot enter the sealed high-pressure battery pack, and the problem of risk that water enters the sealed high-pressure battery pack of the electric vehicle is solved.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method and device for balancing air pressure inside and outside a sealed high-voltage battery pack of an electric vehicle. Background technique [0002] The battery system, the main component of an electric vehicle, is a high-voltage component, and its design directly affects the safety and reliability of the vehicle. [0003] In the battery system, in order to avoid the problems that the sealed high-voltage battery pack of electric vehicles may cause inward / outward deformation of the battery pack shell, damage to the cell pressure valve, and even explosion of the battery pack under certain extreme use conditions, the prior art , the air pressure balance inside and outside the battery pack is achieved by installing a reverse osmosis membrane on the battery pack shell of the electric vehicle's airtight high-voltage battery pack. [0004] The inventors have found through researc...

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Problems solved by technology

[0006] In order to solve the problem that the air pressure balance device in the prior art will cause the risk of water ingress in the sealed high-voltage battery pack of the electric vehicle, the present invention provides an air pressure balance device for the sealed high-voltage battery pack of the electric vehicle, including:

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