Battery foil demand continues to exceed expectations

Aluminum foil for lithium-ion batteries is divided into: aluminum foil for lithium battery positive fluid collector, aluminum foil for lithium battery outer packaging aluminum-plastic film, aluminum foil for pole ears. Usually referred to as battery aluminum foil, refers to lithium battery positive fluid collector aluminum foil. On the one hand, the positive electrode of the battery is a fluid collector electrode, and on the other hand, it is the carrier of the positive electrode material of the lithium battery, that is, the lithium battery material should be coated on it. Battery aluminum foil is an important raw material for lithium battery production. The positive electrode is composed of a positive electrode ear, a high-temperature tape, a positive collector fluid aluminum foil and a positive electrode material. The thickness of the positive collector fluid aluminum foil is about 0.016mm.

The positive collector aluminum foil of high-end power batteries has a high technical content. Aluminum foil for fluid collection is mainly 1060, 1070, 1100, 1235, 3003 and other models of alloy, the mainstream thickness specification is 10-20m, some battery manufacturers use 8m, the future direction is to continue to reduce, and may even reduce to 6m. At the same time, the battery factory has higher requirements for strength, so the production of positive battery aluminum foil is not as simple as imagined.

There is no obvious difference in the basic technology, Know-How to build technical barriers. Aluminum foil is mainly divided into hot rolling and continuous casting rolling, the general industrial double zero aluminum foil, general single foil, battery foil and other basic belong to the pure aluminum series, more suitable for continuous casting and rolling. Although the requirements of battery foil are significantly higher than that of ordinary 0.1mm aluminum foil, the production technology and process are basically the same.

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