Insulated heat conduction film for lithium ion battery

Abstract

The invention discloses an insulated heat conduction film for a lithium ion battery. The insulated heat conduction film is used for covering the surface of a battery body. The insulated heat conduction film is prepared from the following ingredients including alkylolamide polyethylene oxide ester, inositol hexaphosphate, diethylene glycol monobutyl ether, dilauryl thiodipropionate, sodium secondary alkyl sulfonate, sodium hexametaphosphate, dibutyl sebacate, polytetrafluoroethylene, styrene and dibutyl phthalate. The insulation heat conduction film has dual attributes of insulation and heat conduction, and covers the surface of the battery body; the safety performance of the battery can be effectively improved.

Description

technical field [0001] The invention relates to an insulating and heat-conducting thin film for a lithium ion battery. Background technique [0002] Lithium-ion batteries have many advantages such as high energy density, high output power, long charge and discharge life, no pollution, wide operating temperature range and small self-discharge. As a new type of high-energy chemical power source, it has encountered the greatest challenge in the process of solving human environmental pollution and energy crisis, that is, safety issues. Lithium-ion batteries will cause internal short circuit or overcharge and other abuse conditions due to overcurrent and internal dendrites, resulting in internal heat accumulation. When the heat accumulates to a certain extent, it will cause the electrolyte, positive electrode and other internal materials to have an exothermic chain reaction, eventually leading to thermal runaway of the lithium battery. [0003] At present, the way to solve the ...

AI Technical Summary

Problems solved by technology

However, due to the limitations of various factors, the above methods cannot fundamentally solve the safety problem of lithium-ion batteries.