Emergency Charging Solution for Electric Vehicles through EV-to-EV Power Transfer

Abstract

This project develops an EV-to-EV emergency charging system that enables direct power transfer between two electric vehicles using a bidirectional DC–DC converter and BMS. The prototype ensures safe, regulated charging, reducing range anxiety and offering a practical solution for roadside assistance and future smart grid integration. The demand for reliable charging infrastructure has grown significantly.

The popularisation of the Electric Vehicle (EV) is restrained by the stagnation of energy storage technology and inadequate plug-in charging stations. This paper proposes a new vehicle-to-vehicle (V2V) charging technology platform, that can achieve wireless charging working in harmony with plugin charging technology, or operate independently. V2V charging technology can effectively solve the problem of the limited number of plug-in stations. Moreover, it can charge the car any-time, anywhere, like a power bank. V2V charging system design requires a number of technical challenges to be overcome including the power balancing between vehicles and charging circuit design to maximizing the power transfer efficiency. In this paper, the schematic of V2V charging system is proposed, and we also propose the fundamentals of calculating the power capacity and the cost of EV energy when an EV is a power source in a V2V charging system. The hardware circuit design is presented and a detailed comparison of different coil shapes/ combinations and compensation circuit topologies is provided using the simulation tool ANSYS.