According to technical staff, the current market for battery aluminum-plastic film foil is mainly divided into three categories: traditional 1060 pure aluminum foil, 3003 alloy aluminum foil, and the new 8A63 alloy aluminum foil. Each material's performance characteristics suit significantly different application scenarios. Traditional 1060 pure aluminum foil, with a purity of over 99.6%, offers excellent ductility and thermal conductivity, but suffers from low strength and weak tensile resistance, making it prone to damage during deep processing. It is only suitable for ordinary small soft-pack batteries and cannot meet the packaging requirements of high-power energy storage batteries. 3003 manganese-series alloy aluminum foil enhances structural strength through the addition of manganese, with a slight improvement in corrosion resistance. It is currently the mainstream material for mid-range battery aluminum-plastic films. However, it has poor low-temperature formability and is prone to cracking during bending, limiting its application in low-temperature energy storage and outdoor new energy equipment.

The newly developed 8A63 aluminum alloy is a customized battery-specific alloy that achieves a perfect balance of high strength and high formability through precise control of the aluminum-magnesium-manganese trace element ratios. This material not only offers excellent tensile strength and impact resistance, solving the problems of cracking and damage during foil stamping, but also possesses outstanding low-temperature tolerance, maintaining stable mechanical properties at temperatures as low as -40°C, making it suitable for outdoor energy storage and low-temperature operating conditions in new energy vehicles. Additionally, the 8A63 alloy foil features high surface flatness and a dense oxide film, providing stronger adhesion when laminated with plastic film. The sealing performance, moisture resistance, and leak-proof performance of the packaging are significantly improved, effectively extending battery service life.

At present, aluminum-plastic film composite foil and low-temperature shielding aluminum coils developed from the 8A63 aluminum alloy have been fully put into production and launched on the market, securing bulk orders from new energy battery manufacturers. Industry data shows that the new 8A63 aluminum foil can increase the yield rate of battery aluminum-plastic films by over 8%, and improve battery packaging stability by 15%. It is poised to become the core packaging substrate for high-end energy storage batteries and power lithium batteries in the future.