Title: Research of range extension strategies for an electric vehicle at subzero temperatures

Authors: Yucheng Li; Chen Zhao; Cheng Yu; Chenghao Deng; Anjian Zhou; Fuyong Yu

Addresses: Chongqing Changan New Energy Vehicle Technology Co., Ltd., 588 Liangjian Avenue, Longxing Town, Yubei District, Chongqing, 401120, China ' Chongqing Changan New Energy Vehicle Technology Co., Ltd., 588 Liangjian Avenue, Longxing Town, Yubei District, Chongqing, 401120, China ' Chongqing Changan New Energy Vehicle Technology Co., Ltd., 588 Liangjian Avenue, Longxing Town, Yubei District, Chongqing, 401120, China ' Chongqing Changan New Energy Vehicle Technology Co., Ltd., 588 Liangjian Avenue, Longxing Town, Yubei District, Chongqing, 401120, China ' Chongqing Changan New Energy Vehicle Technology Co., Ltd., 588 Liangjian Avenue, Longxing Town, Yubei District, Chongqing, 401120, China ' Chongqing Changan New Energy Vehicle Technology Co., Ltd., 588 Liangjian Avenue, Longxing Town, Yubei District, Chongqing, 401120, China

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%.

Keywords: EV; range extension strategies; subzero temperature; battery heating method; battery heating stage; recirculated air.

DOI: 10.1504/IJEHV.2021.123499

International Journal of Electric and Hybrid Vehicles, 2021 Vol.13 No.3/4, pp.387 - 400

Received: 30 Nov 2021
Accepted: 18 Apr 2022
Published online: 23 Jun 2022 *

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