Electric vehicle power sharing group charging system and method thereof

The invention relates to an electric vehicle power sharing group charging system and a method thereof. The system comprises a power converter station, the input end of the power converter station is connected to an energy storage battery and an alternating current power grid, and the output end of the power converter station is connected with a plurality of charging piles corresponding to different charging parking spaces; the power converter station and the charging pile are respectively connected to the controller, and the power converter station is used for carrying out DC/DC conversion on direct current electric energy output by the energy storage battery and carrying out AC/DC conversion on alternating current electric energy output by the alternating current power grid so as to output rechargeable direct current electric energy to the charging pile; the controller controls the working states of the power converter station and the charging piles according to the charging power of the to-be-charged vehicl