Aluminum-plastic compound film used for anti-pollution polymer lithium-ion power battery and preparation method thereof

Abstract

The invention discloses an aluminum-plastic compound film used for an anti-pollution polymer lithium-ion power battery. The aluminum-plastic compound film comprises a polycarbonate film layer, an aluminum foil layer, an acid modified polypropylene layer and a casting polypropylene layer which are arranged from top to bottom in sequence, wherein anti-corrosion layers are arranged on the upper surface and lower surface of the aluminum foil layer respectively; the polycarbonate film layer is hot-pressed and compounded on the upper surface of the aluminum foil layer through a polyurethanes modified adhesive; and the acid modified polypropylene layer and the casting polypropylene layer are hot-pressed and compounded on the lower surface of the aluminum foil layer. Moreover, the invention discloses a preparation method of the aluminum-plastic compound film. When the aluminum-plastic compound film is used for packaging the polymer lithium-ion power battery, the reduction of the aluminum-plastic compound film is controllable, the aluminum-plastic compound film has relatively high heat resistance, cold resistance and strength, micro short circuit is prevented from occurring in the heat-sealing process of the polymer lithium-ion power battery to cause a liquid leakage failure phenomenon, the polymer lithium-ion power battery is high in safety and long in service life after being packaged, the phenomenon of liquid leakage pollution does not occur, and the development of electric automobiles is effectively promoted.

Description

technical field [0001] The invention relates to an aluminum-plastic composite film, in particular to an anti-pollution polymer lithium-ion power battery aluminum-plastic composite film and a preparation method thereof, belonging to the technical field of aluminum-plastic composite film for polymer lithium-ion batteries. Background technique [0002] The aluminum-plastic composite film has good flexibility, moisture-proof, oxygen-proof, light-shielding, shielding, anti-static, can be vacuumed, and can be printed in color; the materials used for each structural layer in the aluminum-plastic composite film are different, resulting in different final performance, and the indicators may differ Ten times or even a hundred times, the aluminum-plastic composite films currently used for polymer lithium-ion power battery packaging are in various forms, and polymer lithium-ion power batteries have higher and higher technical requirements for aluminum-plastic composite films. , Electric...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies in the prior art, the present invention provides an aluminum-plastic composite film for anti-pollution polymer lithium-ion power batteries and a preparation method thereof. The thinning of the composite film is controllable, and has high heat resistance, cold resistance and strength, which can prevent the micro-short circuit of the polymer lithium-ion power battery during the heat sealing process and cause liquid leakage failure. After the polymer lithium-ion power battery is packaged High safety, long life, no leakage pollution, effectively promote the development of electric vehicles

Images