Development of Communication Simulator for Electric Vehicle Charging following ISO 15118

Electric Vehicles (EV) are set to become the mainstream automotive option, as they minimize the dependence on conventional fuels and decrease carbon footprint. Well-defined communication process among EV, Electric Vehicle Supply Equipment (EVSE) and Central Management System (CMS) is important for smooth, effective and reliable charging of an EV. This paper presents the development of a software-based simulator for EV-EVSE-CMS communication. Message exchange between EV and EVSE is implemented following ISO 15118 over Power-Line Communication (PLC). The EVSE-CMS communication is implemented over Ethernet following Open Charge Point Protocol (OCPP). Both these implementations are done using functionalities of various toolboxes and systems in MATLAB and Simulink. An interactive simulator is created by developing a Graphical User Interface (GUI) which mimics EV, EVSE and CMS in MATLAB. In addition to understanding the message sequence during EV charging, the simulator can also be used as a teaching tool for ISO 15118 and OCPP. The simulator can be further enhanced by implementing message exchange using other charging protocols such as CHAdeMO, GB/T, Open Charge Point Interface (OCPI), Open Automated Demand Response (OpenADR), etc. using various wireless and wired communication technologies.