Scale simulation of battery performance for electric vehicles Online publication date: Wed, 26-Jan-2022
by Carlos Armenta-Déu; Juan Pedro Carriquiry
International Journal of Vehicle Systems Modelling and Testing (IJVSMT), Vol. 15, No. 2/3, 2021
Abstract: This work simulates the performance of lithium batteries for electric vehicles under different charge-discharge rates. The simulation is based on scale factors for power, voltage and current, reproducing real operation conditions of an electric vehicle at the model scale. Most current driving modes have been analysed corresponding to discharge rates from 0.1 C to 0.37 C. The simulation is applied to determine charging time using charge power in real conditions, from 6.1 kW to 18.3 kW (0.1 C to 0.3 C). Driving conditions are obtained using equations for vehicle motion including all forces. Tests are run under two configurations, continuous and alternating current circuits, to reproduce the two types of engines that electric vehicles use. The simulation shows very good agreement in charge and discharge processes, with average deviation of 3% related to real conditions, and 1.6% between them, which proves the validity of the simulation process.
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