The advantages of using 8079 aluminum foil in lithium battery are as follows: Firstly, aluminum foil can inhibit battery polarization, reduce thermal effect and improve rate performance, meanwhile, reduce internal resistance of battery and dynamic internal resistance increase of cycle; secondly, use aluminum foil to pack battery can increase battery cycle life , Improve the adhesion of the active material and the current collector and reduce the manufacture cost of the pole piece. The most important point is that the use of the aluminum foil-wrapped lithium battery can significantly improve the consistency of the use of the battery pack and greatly reduce the battery production cost.