Energy management for electric vehicles with battery and supercapacitor

Abstract

This paper proposes an energy management strategy for battery and supercapacitor hybrid energy storage systems for electric vehicles. The main objective of the hybrid energy storage systems is to extend the durability of the battery pack by minimising peak currents of the battery during the charging and discharging of the battery in high power demand operations. During regenerative braking, energy is captured in the supercapacitor and is later used in high-power demand operations. In the proposed approach, energy consumption is reduced, the size of the battery pack is reduced, and the vehicle range is extended. The approach is based on a simple rule of power splitting in average, peak, and regenerative modes. The proposed hybrid energy management system is implemented and tested in MATLAB Simulink environment for different standard drive cycles.