Research on Power Control of Composite Dual Power Supply System of EV

Composite power supply system is beneficial to make power supply respective advantages complementary to each other. Battery and Double layer capacitors can complement each other to constitute a composite power supply system due to high energy density of battery and high power density of double layer capacitors. Pointing to instantaneous power research of the dual power system, a control scheme was put forward that the battery's instantaneous power was suppressed but super power's was not be restricted. An upper-lower layer management method was adopted and the two layers communicated by CAN. Finally, experiments had been carried on to prove correctness of the solution. Low computing cost is required with the solution and the scheme is easy to engineer realization.