Abstract:

In order to further tap the energy saving potential of the thermal management system of pure electric vehicles and to improve the driving range under low temperature environment, a vehicle thermal management control strategy based on dynamic programming was designed. Firstly, based on the AmeSim and Simulink co-simulation platform, a refined simulation model of the vehicle thermal management system was built, including the battery system, drive system and heat pump system models. Then, a vehicle thermal management control strategy based on forward dynamic programming algorithm was proposed. By optimizing the control trajectory of compressor speed, PTC ( Positive Temperature Coefficient) power and waste heat mode, both economy and cabin comfort were improved. Finally, the simulation based on CLTC (China Light Vehicle Test Cycle) working condition verifies the effectiveness of the control strategy.