Finished product annealing treatment method of aluminum alloy plate strip for new energy battery

The invention relates to a finished product annealing treatment method of an aluminum alloy plate strip for a new energy battery, which comprises the following steps: firstly, measuring the electric conductivity of the aluminum alloy plate strip subjected to cold rolling treatment to obtain the measured electric conductivity, then comparing the measured electric conductivity with the electric conductivity X, and when the measured electric conductivity is greater than the electric conductivity X, judging that the aluminum alloy plate strip is subjected to cold rolling treatment. And finished product annealing is conducted on the aluminum alloy plate strip at the finished product annealing temperature T, the electric conductivity X is any value in the range of 45-50% IACS, and T is larger than or equal to 320 DEG C and smaller than or equal to 360 DEG C. According to the method, the relevance among the electric conductivity, the metal structure, the annealing temperature of the finished product and the tensile