Analysis of International Standard Trends for Enhancing the Compatibility and Safety of DC Electric Vehicle Supply Equipments

The adoption of Electric Vehicles (EVs) is increasing globally. However, the EV market has recently entered a chasm phase, slowing growth. Surveys and Research indicate that challenges not only related to EVs themselves but also to DC electric vehicle supply equipment (DC EVSE) act as major barriers. This study focuses on compatibility and safety issues in DC EVSE and explores solutions based on international standards. Using compatibility and safety as classification criteria, this study identifies nine major changes introduced in IEC 61851-23:2023. These changes have not yet been reflected in domestic standards. However, incorporating them into future revisions could improve compatibility and safety, thereby enhancing the reliability of DC fast charging infrastructure. Ultimately, such standardization is expected to accelerate EV adoption and facilitate the expansion of charging infrastructure.