A power lithium battery safety valve

Abstract

The invention discloses a power lithium battery safety valve, which comprises a valve body, an air intake pipe, and a low-pressure exhaust mechanism and a high-pressure exhaust mechanism arranged in the inner cavity of the valve, the air intake pipe is fixed in the inner cavity of the valve, and the valve The body has a high-pressure exhaust port and a low-pressure exhaust port on the inner wall on both sides of the intake pipe; the low-pressure exhaust mechanism includes buffer air pipe one, buffer air pipe two, low-pressure air intake pipe, low-pressure exhaust pipe, connecting pipe and storage The air chamber is a high-pressure exhaust mechanism, including a high-pressure exhaust pipe, and the two ends of the high-pressure exhaust pipe are connected to the high-pressure exhaust port and the intake pipe respectively; side. Through the arrangement of the low-pressure exhaust mechanism and the high-pressure exhaust mechanism, the present invention can instantly release the high pressure when the exhaust gas pressure is high to prevent explosion. It will affect the airtightness of the safety valve and is worth promoting.

Description

technical field [0001] The invention relates to the technical field of battery safety, in particular to a power lithium battery safety valve. Background technique [0002] Power lithium battery technology is a new type of environmentally friendly energy that has only emerged in recent years. It is widely used in energy storage in electric vehicles, electric bicycles, wind power generation, solar power generation, communications and other fields. Power lithium battery technology is still in its infancy in China. During the charge and discharge process of the battery, the electrons are constantly migrating back and forth to generate heat. Short circuit conditions caused by factors such as charging or discharging, impact or failure will precipitate a large amount of chemical gas. When the pressure reaches a certain level or the internal short circuit of the battery produces sparks It will burn the precipitated flammable gas, causing the battery to explode, posing a threat to pe...

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Problems solved by technology

[0005] Although the above two application documents provide the safety performance of the battery very well and can perform explosion-proof exhaust well, they still have obvious defects: no matter whether the gas pressure generated inside the battery is large enough, as long as the gas pressure can Push the ball valve, the ball valve will open immediately, communicate with the outside atmosphere, and release the gas, but this will greatly reduce the airtightness of the safety valve, which will affect the battery itself

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