The soft-package lithium-ion battery uses an aluminum-plastic composite film similar to the polymer lithium-ion battery as the battery shell, replacing the steel or aluminum shell of the general lithium-ion battery.


Lithium battery aluminum-plastic film, this aluminum-plastic composite film can be roughly divided into three layers: the inner layer is a bonding layer, and polyethylene or polypropylene materials are mostly used for sealing and bonding. The middle layer is aluminum foil, which can prevent the penetration of water vapor from the outside of the battery and at the same time prevent the leakage of the internal electrolyte. The outer layer is a protective layer, mostly high-melting polyester or nylon materials, which have strong mechanical properties to prevent damage to the battery by external forces and play a role in protecting the battery.

As the outer shell of the liquid soft-packaged lithium-ion battery, the aluminum-plastic composite film is no longer just a simple outer packaging of the battery, but also constitutes an indispensable and important part of the liquid soft-packaged lithium-ion battery.


The aluminum foil of the middle layer of the aluminum-plastic film generally adopts various alloy grades such as 1050 aluminum foil, 1060 aluminum foil, 1145, 1235 aluminum foil, etc., and has the status of -O, H14, -H24, -H22, -H18, etc. Mingtai Aluminum foil manufacturer produces lithium batteries Special aluminum foil, has a cooperative relationship with many companies.