INFLUENCE OF CLIMATIC CHANGES ONTO THE PERFORMANCE OF ELECTRIC VEHICLES: APPLICATION TO DRIVING RANGE

Carlos Armenta-Deu; Baptiste Giorgi

doi:10.37591/joaea.v9i2.6445

Abstract

The paper has the goal of developing a methodological process to predict electric vehicle driving range under the influence of sudden temperature changes in intercity routes due to variable climatic conditions. The model is based on the combined effects of discharge rate and temperature changes on the performance of a lithium battery; the model predicts the driving range using the dynamic driving conditions to determine the Depth-Of-Discharge (DOD) at any interval of the route, so the real State-Of-Charge (SOC) of the battery at a specific time can be obtained from the initial state. Driving range is, therefore, determined as the sum of the interval’s time from the initial the final set up state. The numerical simulation has proven that there is a reduction of 2% in distance for a temperature variation range of 5º C, from 15º C to 20º C, which results in a gradient of 0.4%/ºC. This gradient, however, is not constant since it has been found to be dependent on the temperature range, increasing as the temperature range lowers and vice versa. Simulations have been run for three temperature ranges, low (-20º C to 0º C), medium (0º C to 25º C) and high (25º C to 45º C). The results of these simulation have shown that driving range is increased as temperature range raises and diminishes as temperature range lowers. Gradient is of 0.31 %/ºC for the low temperature range, of 0.08 %/ºC for the medium range, and -0.02 %/ºC for the high temperature range.

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