Because of the good storage characteristics and controllability of battery

in the premise of meeting the changing needs

the operators of battery swapping station for electric vehicles can respond to the incentive measures from the power dispatching department

and meet the system operating demands. Firstly

according to the state parameters of the battery packs in a battery swapping station

the state matrix of battery packs is established. Secondly

the battery packs clustered in the light of status

and the battery packs

which are in controllable state

are controlled. Finally

recursive thought is used to study controllable load margin boundaries of backup batteries in the battery swapping station

and then the battery swapping station operators are guided to draw up corresponding charging plans based on the operation target of power dispatching department

reaching the purpose of balancing load and improving area load characteristics. This work is supported by National Natural Science Foundation of China(No. 51477116).