The Fuel Economy Analysis of Series Hybrid Electric Bus with Different Energy Storage Devices

Two kinds of energy strategy devices of series hybrid electric bus, Ni-MH battery and super-capacitor, are used in this paper. The influence of using different energy storage devices on fuel economy of the series hybrid electric system is analyzed by power flow method. The simulation results show that the system with super-capacitor can effectively improve the efficiency of the braking energy recovery, in condition of a certain Chinese city driving cycle and the average power of the electric auxiliary power unit is 5kW.

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