SERIES FORMATION SYSTEM

A series formation system is provided. The series formation system includes at least two formation modules and a power module. The power module is connected in series with the at least two formation modules. The at least two formation modules are connected in series. The power module is configured to supply power to the at least two formation modules. Each of the formation modules includes a battery cell and a formation control circuit. The formation control circuit is electrically connected to the battery cell. The formation control circuit is configured to control a voltage or a current provided by the power module to the battery cell, so that the battery cell is switched between a constant current charging mode and a constant voltage charging mode.