Research on the influence of soak in the cold environment on the energy consumption of electric vehicles

Abstract

The discharge mode has a great influence on the energy consumption of electric vehicles, especially at cold environment, soak in cold environment will lead to the decrease of the temperature of the vehicle/battery, resulting in the increase of energy consumption. In this paper, a segmented driving energy consumption test method was designed according to the real road discharge low of private vehicle, and the continuous and segmented energy consumption tests were carried out on the laboratory drum under −10 °C. From the perspective of energy flow, the differences of driving energy consumption, air conditioner energy consumption and brake energy recovery under the two test methods are analyzed. Results shown that soak in cold environment will cause the energy consumption of driving and air conditioner to increase by 5.5% and 43.8%, respectively, and also lead to a 17.1% decrease in brake recovery energy.