Authors - Tintu Pious, Adon Hale J Payyapilly, Akshit Charan, Amal Suresh, Ashwin Babu Mampilly Abstract - The shift toward decentralized energy grids has established Vehicle-to-Vehicle (V2V) power transfer as a cornerstone of modern EV infrastructure. Central to this exchange is the Dual Active Bridge (DAB) converter, a bidirectional DC-DC topology prized for its high power density and galvanic isolation. The DAB utilizes two symmetrical H-bridges linked by a high-frequency transformer; one bridge acts as an inverter while the other performs synchronous rectification, depending on the power flow direction. Managing energy between independent batteries is challenging due to fluctuating voltage levels that create "moving targets" for control systems. Traditional PID loops often struggle with the instability caused by sudden voltage shifts in dynamic V2V scenarios. This project implements a Fuzzy Logic Controller (FLC) based on a voltage mapping principle. By comparing real-time voltage profiles of donor and receiver batteries, the FLC automatically determines the current direction and optimal phase shift angle without requiring complex mathematical modelling. Beyond emergency charging, this technology enables EVs to function as a mobile, distributed energy storage system within Smart Grids. It optimizes microgrid management in commercial hubs by sharing power autonomously, preventing transformer overload during peak demand. This approach ensures that decentralized energy sharing is both reliable and commercially viable.
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