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This paper provides a quantitative and comparative study on efficiencies of a battery semi-active hybrid energy storage system (HESS) and a battery-only system. The discussion is based on the equivalent series resistance (ESR) circuit models and a pulsed current load. It is theoretically proved that the efficiency difference between the two systems depends on the variance of the load current, the...
This paper provides a quantitative analysis on the energy efficiencies of the battery-ultracapacitor hybrid energy storage system and the lithium-ion-battery-only system under the JC08 driving cycle. There are two control parameters selected in the analysis, the efficiency of the DC-DC converter and the internal resistance of the battery pack. The analysis shows that compared to the battery-only system...
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