The invention discloses a preparation method for producing high-
toughness battery
aluminum foil through a short-process cast-rolled blank. The preparation method sequentially comprises the proceduresof
smelting, cast rolling, cold rolling, homogeneous high-
temperature treatment, intermediate rolling, longitudinal shearing edge
cutting, intermediate annealing, finish rolling, foil rolling, coiling, finished product rolling, slitting and charging annealing. Compared with existing aluminum
alloy material, the
aluminum foil is high in barrier property, excellent in
deep drawing property, good indeformability, high in
puncture resistance, good in sealing property, fine and smooth in surface, high in cleanliness and short in process, meanwhile, through an innovative segmented multistage mode,online degassing and a filtering purifying device, the content of
hydrogen and oxidized
slag inclusions in molten aluminum is effectively reduced, and quality defects, caused by the generation of holes and pinholes, of the battery
aluminum foil are prevented; the aluminum foil has the advantages of good sealing performance, no liquid leakage, safety in use and the like; the technical requirementsof the battery aluminum foil with high
deep drawing forming property, high cleanness, high
toughness are met; and the aluminum foil has important practical value in production of a
new energy lithiumbattery industry.