In order to enhance the efficiency and life cycle of the hybrid energy storage system（HESS）

a kind of novel energy management strategy based on time-sharing algorithm is designed

which can optimize HESS power flow control so to adapt to system constraints. The traditional HESS energy management strategy uses the reference voltage of the super capacitor as the operating constraint to prevent it from being overcharged or undercharged

which results in a narrower utilization range of super capacitor voltage. In fact

however

the safe variation range of voltage of the super capacitor is wider

therefore the new energy management strategy applies the time-sharing algorithm for charge and discharge control of the super capacitor and introduces the voltage band

thus increasing the energy transmission capacity of the HESS and

at the same time

improving the dynamic performance and reducing the size of the super capacitor and therefore improving the economic performance of the HESS. Finally

the energy management tests under different operating conditions are performed by the use of HESS experimental platform

and the result of the new energy management strategy is verified by the experimental result.