Battery state balancing method and device

The invention provides a battery state balancing method and device, and the method carries out the battery capacity balancing of a plurality of battery packs when the voltage information of the plurality of battery packs is an open-circuit voltage or a balanced voltage in the same linear region. And calculating the balance capacity of the plurality of battery packs according to the aging voltage compensation parameters or/and the aging capacity compensation parameters of the plurality of battery packs, and adjusting the capacity according to the balance capacity. Therefore, according to the method, the battery capacity balance can be executed when the voltages in different states are obtained, and the aging parameters of the battery packs are considered, so that the battery capacities of the battery packs are accurately adjusted, and the battery packs are balanced. 本发明提供一种平衡电池状态方法及其装置，其中，该方法当多个电池组的电压信息为开路电压，或位于相同的线性区的平衡电压时，执行多个电池组的电池容量平衡，以通过多个电池组的老化电压补偿参数或/及老化容量补偿参数计算出多个电池组的平衡容量，并依据其平衡容量进行容量调节。是以，本发明能在取得不同状态下