Balancing system for power battery and corresponding load balancing method

An apparatus comprising a charge-balancing system for a power battery, said charge-balancing system comprising at least two accumulator stages arranged in series, each accumulator stage comprising at least one accumulator, a flyback converter, said flyback converter comprising a transformer comprising at least one primary winding configured to be connected to terminals of an accumulator stage of said power battery, and a secondary winding configured to be connected to an auxiliary network whose voltage is less than that of said power battery, for each accumulator stage, an associated switch connected to said primary winding of said transformer and to a negative terminal of said accumulator stage, a monitoring device for monitoring voltage across terminals of said accumulator stages, and a control device for controlling said flyback converter, said control device comprising a processor configured for receiving voltage information from said monitoring device, and when an accumulator stage exhibits a voltage greater than that of other accumulator stages, causing closure of said switch associated with said accumulator stage and transfer of energy from said accumulator stage to said auxiliary battery so as to balance charge of said accumulator stages.

A charge-balancing method for a power battery comprising at least two accumulator stages arranged in series, each accumulator stage comprising at least one accumulator, said method comprising measuring voltages across terminals of each accumulator stage, comparing said measured voltages, and in response to determining that one measured voltage is greater than other measured voltages, causing closure of at least one switch of a flyback converter, said flyback converter comprising a transformer that comprises at least one primary winding connected to terminals of an accumulator stage of said power battery and linked to said at least one switch, and a secondary winding connected to an auxiliary battery whose voltage is less than that of said power battery, whereby causing closure of said at least one switch effects transfer of energy from said accumulator stage associated with said at least one switch to said auxiliary battery, so as to balance charge of said accumulator stages.