In order to explore the effect of annealing process on the properties and microstructure of 3003 aluminum alloy for lithium battery of new energy vehicle, the evolution characteristics of room temperature mechanical properties, hardness, cupping value, earing rate and microstructure of 3003 aluminum alloy for lithium battery of new energy vehicle after annealing at different temperatures (150 ~ 500 ℃) and holding for 3 h are studied by means of electronic universal testing machine, hardness tester, cupping test machine, forming test machine and optical microscope. The preferred experimental annealing process of 3003 aluminum alloy is determined. The results show that the best combination of mechanical properties, formability and microstructure of 3003 aluminum alloy is obtained when the annealing temperature is 400 ℃ and the holding time is 3 h. This annealing process is applied to the box-type annealing furnace on the production site for verification, which is in good agreement with the test results.

Lithium battery  /  Aluminum alloy  /  Annealing process  /  Microstructure