Automobile energy feedback type active balance control system and method and electric automobile

The invention belongs to the technical field of power batteries, and discloses an automobile energy feedback type active balance control system and method and an electric automobile. Whether the automobile is in a downhill or braking state is determined. When the automobile is in the downhill or braking state, a switch is closed, the system starts to work, energy recovery starts, wheels rotate togenerate alternating current, and the alternating current is rectified and filtered to form direct current to charge the storage battery; when the automobile needs active equalization and the voltageof a storage battery is higher than the voltage of a battery cell needing equalization, the battery cell needing charging is directly connected with the storage battery for equalization charging; whenthe voltage of the storage battery is lower than that of the battery cell, the storage battery is connected with the battery cell through a DCDC converter for charging; and if active equalization isnot needed at the moment, th