Abstract:

In order to ensure the operation safety of electric vehicles， relevant standards of intrinsic safety， active protection safety and passive protection safety of traction battery have been formulated in China， forming a standard system. In this paper， through analyzing the history， faced challenges and improvement suggestions of the existing safety standards， combined with the research and application of traction battery safety technology and national guidance policies， etc， it is shown that the monitoring and early warning of traction battery operating state based on big data is an effective way to prevent thermal runaway， with the suggestions for further completing and perfecting standard system and management mechanism put forward.

Key words: electric vehicles, traction battery, thermal runaway, safety standards