Abstract
In order to reduce the engine fuel consumption and power battery energy consumption of REEV(Range Extend Electric Vehicle)under low temperature driving, this work changes the battery cooling preheat circuit from air-cooling to water circulation on a commercial vehicle model. The waste heat from the motor is also utilized in the cabin through a heat exchanger to assist the PTC heat generation. Under the same conditions, simulations and experiments showed a 0.54 % increase in fuel consumption and a 0.55 % reduction in battery energy consumption. In order to further reduce the energy consumption of REEV under low temperature driving, this paper uses PID, MCCS and BPNN-MCCS to control the low temperature PTC heating power and cabin inlet airflow. The comparison with the ON-OFF control shows that the energy consumption is reduced by 1.56 %, 2.2 %, and 2 % respectively compared to the original.
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