The value difference between each adjacent single battery pack in the series battery unit group and the value difference between each adjacent single battery pack in each single battery pack are used as the equilibrium criterion.
The equilibrium basis is based on the difference between the value of each adjacent unit battery pack in the series battery cell group and the difference between the value of each adjacent unit battery pack in each unit.
The balance criterion is based on the difference between the values of the adjacent cells in the series battery pack and the difference between the values of the adjacent cells in each cell pack.<BR>