Energy management strategy research and performance simulation for electric vehicles based on dual-energy storage system

On the basis of a contrastive study on the performances of various energy storage systems, a new energy storage and management system solution for electric vehicles (EVs) is presented, namely dual energy source system (DESS). Aiming at the DESS features, an improved rule-based muti-operating points power-following control strategy is developed. According to performance requirements of the EVs mentioned in the paper, the parameters match of the power system of the EV are finished and the corresponding simulations are carried out. The results show that the power system with the DESS is excellent in both powers and economics, compared with single power system, and especially in high power and high torque conditions, the DESS has more obvious advantages.