In order to improve the performance of vehicle power battery in low temperature environment,a battery heating system with positive temperature coefficient(PTC)thermistor as the main heating source and the waste heat of the air conditioning system as the auxiliary heat source was designed.Based on the heat transfer process of the proposed system,a heat transfer mathematical model was established,and AMEsim and MATLAB software were used to establish a simulation model of the proposed system.The process of battery heating had the characteristics of large delay and slow response.In order to improve the response speed of the system,the control strategy of PTC and water pump motor was designed based on the model predictive control algorithm.The simulation results under CLTC-P condition show that the heating rate of the battery can be increased by using the waste heat of the air condi-tioner.Compared with PID control,the model predictive control reduces the working time of the heater by 106 sec-onds and the heating energy consumption by 0.07 kWh.
关键词
车辆工程/新能源汽车/热管理/电池升温/模型预测控制
Key words
vehicle engineering/new energy vehicles/thermal management/battery temperature rise/model predic-tive control
维普
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