PROCESSING METHOD FOR REUSING WASTE BATTERY

The present invention relates to a processing method for reusing a waste battery, the processing method comprising the steps of: cooling, for a minimum cooling time satisfying formula 1 below, a battery pack comprising: as a unit cell, a battery that includes a plurality of lithium ions, and freezing same; and crushing the frozen battery pack. minimum cooling time = A × W 0.33 (A = 4 × e , W = battery weight (Kg), dT= | external cooling temperature - target temperature |, | | means absolute value)