In recent years, the uses of lithium batteries has greatly expanded, and the demand for
aluminum foil for lithium ion battery has rapidly increased. Take Samsung SDI, LG Chem, Panasonic, ATL, BYD as example. In recent years, their lithium battery production has a huge growth while the technical requirements for
aluminum foil also have been greatly increased.This has a certain stimulating effect on the domestic
aluminum foil industry. Battery foil is being recognized as an independent
aluminum foil variety. The recent safety accidents such as explosion and spontaneous combustion in the production or use of batteries is a warn for not only the battery industry, but also the
aluminum foil. What is the requirements for
aluminum foil battery?Firstly, high cleanliness of the
aluminum foil. No debris, dust, especially iron debris should be mixed into the
aluminum coil, which will seriously affect the safety of the battery during the charging and discharging process.Secondly, high requirements for the shape of
aluminum foil. The uniformity of the positive electrode material coated on the surface of the
aluminum foil will greatly affect the service life and endurance of the lithium battery.The coating process is almost free of tension, which has a very strict requirements on the
aluminum foil, usually below 10I.Thirdly, high mechanical properties of
aluminum foil. Under the premise of high purity, the higher the tensile strength and the elongation, the better the
aluminum foil. But as we all know, the higher the aluminum purity, the lower the tensile performance. This undoubtedly brings many challenge to the development of battery
aluminum foil.Fourthly, high requirements for thickness and pinholes. Having a thinner body is an important way to increase the capacity of lithium batteries. However, the reduction in the thickness of the
aluminum foil will inevitably lead to an increase in the number of pinholes. It is another difficulty for the manufacturing of
aluminium foil battery.Fifthly, high surface requirements. The surface of the
aluminum foil must not have various surface defects such as dark spots, black oil lines, and pits, having close relationship with the uniform coating of the lithium battery and the compaction process, which requires the high cleanliness of
aluminum foil machines and the processing environment.Finally, high dyne value. In order to ensure the coating quality, the dyne on the surface of the battery grade
aluminum foil should be above 32 dyne, even 34 or 36 dyne.Aluminum foil is one of the main raw materials for power batteries, and its quality management also needs to pass the TS16949 system certification. A dust-free production workshop (300,000 or even 100,000) suitable for the battery production environment has become a necessary condition. Haomei, a big
aluminum foil manufacturer, has the solid power to produce quality battery
aluminum foil.