Multi-dimension statistical analysis and selection of safety
The studied EVs can be divide into two groups: (1) Seven normal EVs without any battery safety issues No. 1 ∼ No. 7: According to safety alarm and regular maintenance, not any battery safety issue has been detected. (2) Seven EVs with battery safety issues No. 8 ∼ No. 14: Safety issues occurred to the batteries in the pack but were ignored.