Electric Vehicle Supply Equipment: An Overview on Design Requirements as per AIS-138

Abstract

Wide spread deployment of safe, reliable and cost-effective charging infrastructure is necessary for the faster penetration of EVs. Electric Vehicle Supply Equipment (EVSE) shall be designed to meet the standards to ensure interoperability, safe & reliable operation and functional requirements. The paper gives an overview of the various international standards governing EV charging. India, as part of the E-Mobility mission implementation, has developed Automotive Industry Standard-138 (AIS-138) as the standard for conductive charging of EVs. EVSE is a system comprising of power converters, control electronics and communication interfaces. The paper details about the design requirements in the EV charger in various aspects like electrical performance, insulation, electromagnetic compatibility, connector, communication and protection requirements as per AIS-138.