A study on comparison between BL and CD-CS optimal energy management strategies for extended range electric vehicles

The optimum control effects for extended range electric vehicles under two typical energy management strategies are comparatively studied. By creating novel control model and introducing new type of dynamic programming, the complexity of computation on optimum energy management issue is greatly lowered. The results of simulation for different driving circle combinations and driving distances indicate that: 1) under blended (BL) type control strategy, the optimal SOC approximately linearly lowers with the extension of driving distance; 2) The fuel and electricity consumptions under BL control are always slightly lower than those under CD-CS control; 3) The service life of battery can be notably extended with BL control.