Power Control-Based Three-Point Energy Management Strategy for Range-Extended Electric Vehicle

To address environmental pollution and the global energy crisis, the development of electric vehicles has received extensive attention. However, its current development is restricted by factors such as charging time, battery energy density, and cost. Range-extended electric vehicles are regarded as an ideal transitional type. The focus of the study on range-extended electric vehicles is energy management strategy. This paper proposes a power control-based three-point energy management strategy, which can realize simple and stable control of the engine and generator operation. Through joint simulation experiments with AVL-Cruise and MATLAB/Simulink, it is shown that the combined fuel consumption of the proposed strategy was decreased by 5.29% compared to power following energy management strategy and avoids frequent fluctuations in engine speed, reducing engine wear. Compared to the PID control-based three-point energy management strategy, the proposed strategy decreased combined fuel consumption by 0.63% due to its better control accuracy while being simpler to implement. Finally, the results of simulation show that the overall performance of the power control-based three-point strategy is better than that of the other two strategies.