Lithium ion power battery explosion protection cover

Abstract

The invention relates to a lithium ion power battery explosion protection cover, belonging to the technical field of the lithium ion battery. The lithium ion power battery explosion protection cover comprises a cover plate and an explosion-protection film, wherein the cover plate is provided with an explosion-protection hole. The lithium ion power battery explosion protection cover is characterized in that the explosion-protection hole is provided with a rubber sealing plug, and the rubber sealing plug is connected with a pressure spring. The lithium ion power battery explosion protection cover has novel structure, high safety level and good explosion protection effect, is assembled compactly, is convenient to process and not easy to leak electrolyte and can ensure that the lithium ion power battery has long service life, thereby having wide application range.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to an explosion-proof cap for lithium ion power batteries. Background technique [0002] At present, lithium-ion batteries have the characteristics of small size, light weight, strong power, no memory, and environmental protection, and are widely used in power tools, power vehicles, electronic equipment and daily life. The existing explosion-proof device for lithium-ion power batteries includes a cover plate and an explosion-proof film, and the cover plate is provided with an explosion-proof hole. Existing power batteries use copper foil film as a bursting film to play a safe and explosion-proof role, but the copper foil film and battery electrolyte are prone to corrosion, so there are potential safety hazards, and the aluminum film that does not react with the electrolyte is used to make the bursting film Because the aluminum membrane is relatively soft, it is easy t...

AI Technical Summary

Problems solved by technology

Existing power batteries use copper foil film as a bursting film to play a safe and explosion-proof role, but the copper foil film and battery electrolyte are prone to corrosion, so there are potential safety hazards, and the aluminum film that does not react with the electrolyte is used to make the bursting film Because the aluminum membrane is soft, it is easy to be damaged during the movement of the power battery or the vibration of the work

Now it is generally designed to add a protective film (PFA) to both ends of the aluminum film, which has the disadvantages of high production cost, irreparable, poor appearance, and easy leakage, which directly reduces the performance level of the battery and poses a safety hazard. , and even cause major accidents, etc.

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