DESIGN ISOLATED HALF-BRIDGE CONVERTER FOR ELECTRIC VEHICLE BATTERY CHARGER USING CCCV METHOD

In electric vehicles (EVs) battery charger is usually utilized with an offboard charging system or well-known as plug-in charger. Therefore, this paper proposes an off-board charging mechanism that is composed with the isolated DC to DC Converters architecture under a constant current and constant voltage (CCCV) method in order to charge the batteries in an electric vehicle. The most converter topology used is half-bridge converter in isolated operation. This converter is able to handle higher power, high efficiency and has lower price. From simulation and hardware implementation of this converter it shows that this charger can be operated for total load about 1.5 kW and delivers the current about 14.4 A. Here, in order to compare with the simulation, prototype of this charger is also tested by charging the battery with CCCV operation. From hardware implementation it shows that in CC mode, the proposed topology delivers current about 1 A with the peak-peak ripple of 7%. Meanwhile, under charging condition at 1.5 A and 2 A it gives the impact on ripple about 23%. Therefore, it can be concluded that CCCV method under simulation and hardware implementation is the same. In this case charging with 2 A in CC condition is the result because of consuming the total times about 17.83 minutes.