Battery equalization method and device and storage medium

The invention provides a battery equalization method and device and a storage medium, and the method comprises the steps: determining a first single battery with the minimum current voltage according to the current voltage of each single battery in response to a detected vehicle power-off instruction, and determining a second single battery with the minimum current voltage except the first single battery; the method comprises the following steps: determining a first battery cell and a second battery cell, determining a target balance minimum capacity between the first battery cell and the second battery cell, obtaining the minimum capacity of the current balance, obtaining the minimum target balance time, and carrying out balance processing on the battery cells except the first battery cell according to the target balance time after the vehicle is powered off. The target battery pack is subjected to equalization processing through the minimum equalization time, so that the sleep equalization safety is improve