A functional heat insulation device for a lithium battery

Abstract

The invention provides a functional heat insulation device for a lithium battery, comprising a functional material which is a material having a fire extinguishing function and a heat absorption and cooling function, and the functional heat insulation device is fixedly mounted on a side surface of a lithium ion cell. Compared with the existing insulation cotton technology, the device can more effectively prevent the heat transfer phenomenon between lithium ion cells, reduce the energy produced by lithium battery deflagration, and avoid the occurrence of lithium ion battery ignition, thus effectively reducing the chain reaction caused by lithium ion battery ignition or explosion, and improving the safety performance of a lithium ion battery to a large extent.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a functional heat insulation device for lithium batteries. Background technique [0002] With the gradual development of new energy vehicles, lithium-ion batteries have gradually replaced gasoline as the power support for vehicles. However, the safety performance of lithium-ion batteries has greatly restricted the development of electric vehicles. Among them, the deflagration caused by the internal short circuit of the lithium-ion battery has become the most urgent problem in the field of power batteries due to the diversity of causes, the randomness and singularity of the first deflagration battery, the inability to completely eliminate the deflagration incentives, and the inability to detect before shipment. question. [0003] Therefore, the current research on the internal short-circuit deflagration of lithium batteries has also become a relatively important part of the ...

AI Technical Summary

Problems solved by technology

At present, the usual practice is to install a thermal insulation film between lithium batteries. However, the thermal insulation film can only achieve the effect of heat insulation and cannot reduce the heat. The thermal film will lose its effect, and the catastrophic accidents of battery fires and explosions are still unavoidable

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