Abstract: Analyze the fire accidents of lithium?ion battery electric vehicles that have occurred both domestically and internationally in recent years, and briefly summarize the fire risks of electric vehicles. A review is focused on the scientific research achievements of the United States, Canada, Austria, Sweden, China and other countries in the full?scale fire testing and fire prevention and control of lithium?ion battery electric vehicles. Based on domestic and foreign research results, the heat release rates of lithium-ion battery electric vehicles with different battery capacities are summarized, with a focus on the relationship between the total combustion heat release, peak heat release rate, the release of toxic hydrogen fluoride gas and battery capacity， providing necessary data reference for the research of fire prevention and risk assessment technology for lithium?ion battery electric vehicles in China.

Key words: lithium?ion battery, electric vehicles, full scale fire test, heat release rate