Designing a Bidirectional Isolated DC/DC Converter for EV with Power Back Operation for Efficient Battery Charging During Neutral Run

Electric Vehicle (EV) battery chargers encounter everyday problems in efficiency, dependability, affordability, isolation, and power density. Existing iron core transformer-based bulky chargers charge 1 million electric vehicles in Bangladesh, but without digital control. This work illustrates, analyzes, designs, and implements a power electronics-based charger with automatic charging current regulation. Bidirectional DC-DC converters (BDC) are gaining popularity in industry and research due to their high-power transfer efficiency, reduced size, grid charging facility, increased EV energy storage system efficiency, voltage regulation, and converter optimization. Dual-mode converters. One is low voltage and the other is high. In buck mode, input voltage is higher than output, while in boost mode, it's higher. The suggested bidirectional converter was examined on a 200W prototype with a 200-V bus and a 24–48 V battery. The 20kHz prototype circuit has 93.1% full-load boost efficiency and 92.2% buck efficiency. Comparing a charger's efficiency and maximum rated power. PROTEUS is used to simulate the proposed scheme's performance.