1.College of Automation & College of Artificial Intelligence, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;2.School of Modern Posts, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;3.NARI Technology Co., Ltd., Nanjing 211106, China

With the vigorous development of renewable energy technology in the world,electric vehicles (EVs) and their supporting charging facilities are becoming increasingly popular. The spontaneous fire accidents of EVs and charging safety issues have also attracted much attention. From the perspective of charging safety factors,this paper thoroughly summarizes the research methods of charging safety early warning for EVs and charging equipment in recent years. Firstly,the influencing factors of charging safety are classified in detail,and the maturity of the existing charging safety early warning methods are summarized and discussed. Then,the evaluation indexes such as early warning model accuracy and early warning error are summarized. Next,the existing models are evaluated and compared based on real charging order data and work order data. Finally,the future research work of charging safety early warning for EVs and charging equipment is prospected