Capacity balance control method and system of mobile power supply device, and terminal equipment

The invention relates to the field of capacity balance control, in particular to a capacity balance control method and system of a mobile power supply device and terminal equipment, and the method comprises the steps: respectively obtaining the battery pack capacity of N battery packs; judging whether the battery pack capacities of the N battery packs are equal or not; if the battery pack capacities of the N battery packs are equal, balancing the electric quantity of the batteries in the battery packs; and if the battery pack capacities of the N battery packs are not equal, balancing the electric quantity among the battery packs. According to the mobile power supply device, when the batteries are not in the use state, the electric quantity in the battery packs is adjusted to be balanced, and the electric quantity in the battery packs is also adjusted to be balanced, so that the charging and discharging degrees of the battery packs in the mobile power supply device and the batteries in the battery packs are ke