Research of range extension strategies for an electric vehicle at subzero temperatures Online publication date: Thu, 23-Jun-2022
by Yucheng Li; Chen Zhao; Cheng Yu; Chenghao Deng; Anjian Zhou; Fuyong Yu
International Journal of Electric and Hybrid Vehicles (IJEHV), Vol. 13, No. 3/4, 2021
Abstract: In this paper, NEDC range extension strategies for an electric vehicle at ambient temperature of -7±3°C are studied. A mechanical-thermal coupled simulation model is developed by using professional software Simulink and Simcenter Amesim, on which range increase rates of proposed strategies are determined. Chassis dynamometer tests are performed to validate the model and the simulation presents that average accuracy is over 94.7%. Factors with corresponding levels that constitute different strategies are considered, i.e., heater type, battery heating method, heating stage and recirculation of in-car warm air. According to the combination, 106 strategies are obtained and compared. It is shown from simulation results that, for strategies where discharge capacity is increased by battery heating, range increase rate varies from -4.9% to 16.0%. On the other hand, strategies that extend range by reducing cabin heating power show increases of 0.1% to 13.0%.
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