Fast Charging of Lithium-ion Battery for Electric Vehicles Application

Electric vehicles (EVs) will make up a large amount of the demand on future power networks as more people switch to driving them. Lithium-ion battery fast charging is critical to save time and minimize its impact on the utility grid. The goal of this paper is twofold: first, to create a proof-of-concept Simulink model for EV fast chargers; second, to highlight several shortcomings in present fast charger technology. The suggested technique employs PWM rectifiers on the grid side to provide a near-unity power factor with sinusoidal voltage and current. A buck DC-DC converter on the battery side provides the necessary charging voltage to the Lithium-ion battery. Both converters are designed to provide their primary objectives. A set of simulation results is provided to validate the suggested fast-charging technique. The proposed technique successfully charges a 50-kWh battery in 10.25 minutes.