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CCCV controlled Solar Integrated On-Board Charger for Vehicle-to-Home Operation using Bridgeless Bi-directional Flyback Converter

A bridgeless bidirectional flyback converter module that enables the battery of an electric vehicle to be used as an inverter or as an emergency power backup device for powering critical residential loads is proposed in this paper. Incorporating solar panels with this system helps in the prolonged use of the Electric Vehicle (EV) battery as an inverter module and avoids the possibility of total depletion of the battery module. The different modes of operation include Plug-in Charging, Solar Photo-Voltaic (PV) Charging and an Emergency Power Backup mode. The main circuit developed for this project includes a 48V 20Ah Li-ion battery module, a 250Wp Solar Panel module, a Bi-directional Flyback converter capable of both rectifying and inverting modes of operation for charging the EV battery as well as powering critical loads in the respective residential buildings, a charge controller to provide Constant Current Constant Voltage (CCCV) mode of charging and control circuits to provide the necessary control signals for the converter switches (MOSFET’s). The simulation results in this paper were achieved through MATLAB 2020b’s Simulink software.