Smart Battery Charging Station for ElectricVehicle Using Half Bridge Power Converter

Abstract

This paper presents a concept of smart charging station using bidirectional half bridge converter for an electric vehicle. This battery charging station is useful for charging applications along with harmonics and reactive power compensation in a distribution system. A filter which is adaptive to the supply voltage frequency is used for the estimation of the 50 Hz component of load current. Due to additional features of vehicle charger, associated with the power quality improvement, there will be a drastic reduction in the current drawn from utility to meet the same load demand. The charging station presented in this paper is termed as smart with several function. The proposed smart charger is able to improve power quality of residential loads or other loads, not only during charging/discharging of the vehicle battery, but also in the absence of the vehicle. The Simulink model is developed with MATLAB software and its simulation results are presented. The level of current distortion during charging and and discharging mode is recorded 1.6 % and 2.4 % respectively with unity supply power factor during experiments. The performance of converter is evaluated during charging modes both in constant current (CC) and constant voltage (CV) modes.

Design of Digital Control System for DC/DC Converter of On-Board Charger

“…At present, there are many charging modes, such as constant current-constant voltage charging, variable current intermittent charging, and multistage constant current charging [4]. Constantcurrent-voltage constant-charge, rst large current constant-current, and then constant-voltage charge, not only avoids the phenomenon of current overcharge but also reduces the amount of gas evolution.…”