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Lithium ion power battery explosion protection device

A technology of power batteries and explosion-proof devices, which is applied to battery pack parts, circuits, electrical components, etc., can solve the problems of easy corrosion of copper foil film and battery electrolyte, lower battery performance level, and potential safety hazards, and achieve structural Novelty, harm reduction, high safety effect

Inactive Publication Date: 2012-11-21
TIANJIN BATTERY ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Lithium ion power battery explosion protection device

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Embodiment 1

[0023] An explosion-proof device for a lithium-ion power battery comprises a cover plate and an explosion-proof film, and the cover plate is provided with an explosion-proof hole. The explosion-proof hole of the cover plate is located at the bottom of the sinking platform of the cover plate, which is a φ6-φ12mm round hole. There is a rubber sealing plug at the explosion-proof hole of the cover plate, and a tower-shaped pressure spring is installed on the rubber sealing plug. A sealing plug gland 10 is provided at the joint between the tower spring and the rubber sealing plug.

[0024] An explosion-proof diaphragm is arranged on the cover plate, and the explosion-proof diaphragm is assembled by a burst diaphragm base, a burst bush and sealed soft aluminum. The bursting disc base, the bursting bushing and the upper part of the sealed soft aluminum are equipped with an outer protective rubber membrane. A rubber sealing ring is installed between the bursting diaphragm base and th...

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PUM

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Abstract

The invention relates to a lithium ion power battery explosion protection device, belonging to the technical field of the lithium ion battery. The lithium ion power battery explosion protection device comprises a cover plate and an explosion-protection film. The lithium ion power battery explosion protection device is characterized in that the cover plate is provided with an explosion protection film base, the explosion protection film base is provided with an explosion protection lining, sealing soft aluminum and an explosion protection film, and the explosion protection film is firmly assembled together with the explosion protection film base, the explosion protection lining and the sealing soft aluminum. The lithium ion power battery explosion protection device 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 device 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 eas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/12H01M2/04H01M2/08H01M50/147H01M50/183H01M50/342
CPCY02E60/10
Inventor 李福兴蔡艳云
Owner TIANJIN BATTERY ELECTRICAL