1,Performance and characteristics
Compared with ordinary aluminum foil, as a battery collector aluminum foil has higher requirements, in which the thickness is required to be controlled at 10~50 microns, and some battery factories even use 8 microns of aluminum foil. At the same time, the battery collector also requires lower roughness, better electrical conductivity, tensile strength, elongation, in addition to the consistency and stability of the product also has high requirements. Therefore, battery aluminum foil has higher requirements for equipment and process, with certain barriers to entry.
2,Process
Battery aluminum foil is rolled using electrolytic aluminum (ingots) provided by upstream suppliers. Battery aluminum foil has very high performance indexes in terms of pattern quality, geometric dimensions, surface end quality, mechanical properties, surface wetting tension, etc., and possesses a high technological threshold. In the production process, in addition to melting, casting/hot rolling, cold rolling, annealing, foil rolling and other processes, it is also required to undergo the coiling, fine rolling, corona treatment, intaglio conductive coating, precision slitting and other processing procedures.
