Development of electric vehicle to electric vehicle charging protocol

This thesis is about the development and implementation of an "DEVELOPMENT of ELECTRIC VEHICLE to ELECTRIC VEHICLE CHARGING PROTOCOL" that enables direct energy transfer between electric vehicles. One of the biggest obstacles in the spread of electric vehicles is the geographical limitations and high installation costs of fixed charging stations. The V2V charging approach aims to partially reduce the dependency on fixed stations, enabling a vehicle to receive the energy it needs from another vehicle that is turned into a 'mobile charging station'. Range concerns have a direct impact on user preferences and the growth of the sector, and increasing battery capacity does not solve situations where the fixed station network is insufficient. Providing fast charging in rural areas and emergency situations poses a major challenge. The vehicle-to-vehicle charging concept offers a solution to these problems with the vehicle acting as a mobile charging station. This flexible approach makes it possible to provide fast charging services in the field. The thesis work includes the design of a CAN-based communication protocol for V2V charging, the selection of hardware components to manage the bi-directional power flow, and testing in a laboratory environment. The aim is to materialise the idea of direct energy sharing between electric vehicles by providing a secure, stable, flexible and extensible architecture. The importance of the thesis work is evident in both academic and industrial aspects. Academically, it supports the V2V charging concept, which has few examples in the literature, with experimental data. Industrially, it paves the way for new business models by showing the applicability of mobile charging stations in areas such as logistics, fleet management, emergency support services. The protocol exchanges low latency messages between the transmitting vehicle (e.g. 0x202 ID) and the receiving vehicle (0x206 ID) via CAN. It defines message types such as 'charge start/stop', 'instantaneous battery parameters', 'maximum values' etc. using mode and index numbers The thesis focuses on a single transmitter and receiver vehicle, with limited examination of multiple receiver scenarios and long-term battery impacts. Commercial deployment of V2V charging may be constrained by regulatory and licensing barriers, but can be enhanced with scalable infrastructure and additional modules. The study designed and validated the V2V charging protocol and highlighted the logistical advantages of mobile charging stations. It promises wider applicability in the future with wireless communication and smart grid integration.