Lithium ion battery cell protection structure

Abstract

The invention discloses a lithium ion battery cell protection structure, and particularly relates to the technical field of lithium ion battery protection. The lithium ion battery cell protection structure comprises a cell main body, a diaphragm and an aluminum foil, and is characterized in that a fire extinguishing mechanism is arranged between the diaphragm and the aluminum foil; the fire extinguishing mechanism comprises a bottom plate, a fire extinguishing box is fixedly arranged at the bottom of the bottom plate, an iron plate is arranged at the top end in the fire extinguishing box, an electromagnet is arranged at the top of the iron plate, an air bag and a plurality of first springs are arranged at the bottom of the iron plate, first guide pipes are fixedly arranged on the two sides of the air bag, second guide pipes are fixedly arranged at one ends of the first guide pipes, a plurality of third guide pipes are fixedly arranged on one side of the second guide pipe, a storage pipe is fixedly arranged at the top ends of the third guide pipes, and the storage pipe is filled with first fire extinguishing dry powder. According to the invention, the iron plate is utilized to extrude the air bag, so that the air bag can extrude nitrogen, and the nitrogen can be utilized to blow the first fire extinguishing dry powder in the storage pipe into the space between the first heat conducting coating and the aluminum foil, thereby extinguishing the flame in time and preventing a mobile phone from exploding.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of lithium-ion battery protection, and in particular to a lithium-ion battery cell protection structure. Background technique [0002] Lithium-ion battery (abbreviated as LIB) is a rechargeable battery, first proposed by Exxon chemist Stanley Whittingham (M Stanley Whittingham) in the 1970s. Lithium-ion batteries are commonly used in portable electronics and electric vehicles, and are increasingly popular in military and aerospace applications. [0003] Lithium-ion batteries are also widely used in the technical field of mobile phone batteries, but safety accidents of mobile phone battery explosions often occur in daily news. It is known that explosions of mobile phones are mostly caused by battery fires. The rectangular lithium-ion batteries in the prior art The aluminum foil in the battery is easily in contact with the internal diaphragm at the corner, which can easily lead to a ...

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Problems solved by technology

[0003] Lithium-ion batteries are also widely used in the technical field of mobile phone batteries, but safety accidents of mobile phone battery explosions often occur in daily news. It is known that explosions of mobile phones are mostly caused by battery fires. The rectangular lithium-ion batteries in the prior art The aluminum foil in the battery is easily in contact with the internal diaphragm at the corner, which can easily lead to a short circuit of the battery and cause a fire. Moreover, the existing technology cannot extinguish the fire inside the battery in time, which can easily cause the explosion of the mobile phone

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