Optimal Online Available Control Strategy Design for Non-interruption Dual-motor Propulsion System for Battery Electric Vehicles

With the rise of new energy vehicle industry as a national strategy, China has gradually occupied an absolute leading position in the field of battery electric vehicles, especially commercial battery electric vehicles, and has taken the lead in the research and development of dual-motor coupling propulsion technology. Due to the complex and diversiform structure of multi-source power speed-variable propulsion system, there is no mature configuration and technical details. Also, the control problem is a typical hybrid system problem, and there is no unified and clear problem description and solution method. In addition, the current research on the mode switching derived from the novel electrified powertrain is not deep enough to fully explore the potential advantages of electromechanical driveline, and there is a certain research blank considering the online implementation. In response to the objective of using new energy vehicles for transportation during all the events of the 2022 Beijing Winter Olympics, a dual-motor coaxial propulsion system for battery electric vehicles is proposed. The system aims to meet the requirements of both high way and mountainous roads under cold environments. Besides, an optimal online available control strategy design method including data-driven gear shifting schedule extraction and optimized power distribution is proposed to eliminate power interruption during gearshift, improve the gearshift quality and reduce the energy consumption. Experimental results demonstrate that such supervisory strategy can improve the energy consumption significantly and is proved to be efficient, flexible and online implementable compared to the other strategies.