The aluminum alloy is soft, with small density, and good tensile properties, it is easy to stretch and form the entire battery case, so 3003 aluminum alloy has been used by many companies for battery packaging. In order to increase cruising duration, new energy electric vehicles need a large number of combination modules of lithium battery, each module is composed of many battery boxes, so that the quality of each battery box has a great impact on the quality of the entire battery module, so the use of aluminum alloy materials is an inevitable choice for the lose weight of battery module

The battery is one of the core components of the new energy electric vehicle, and a good packaging determines the safety and life of the battery. At present, 3003 aluminum alloy is generally used for power battery shells of electric vehicles. 3003 aluminum alloy is easy to form, has good corrosion resistance even in high temperature, good heat transfer and conductivity. In addition, the power battery shell (except shell cover) that made of 3003 aluminum alloy can be stretched at once, compared with the stainless steel shell, it can save the bottom welding process.