Abstract

High voltage safety is very important for electric vehicles, how to ensure the passengers’ safety in traffic accidents is an important research subject. This paper describes a study of the high-voltage safety of an electric vehicle under rear impact conditions to ensure that it is in accordance with Chinese regulations. The high-voltage safety has been analyzed and optimized from several perspectives and includes the development of a high-voltage cutoff strategy, assessment of the integrity of the high-voltage components after the crash, the layout of the high-voltage and low-voltage cables, and the crashworthiness of the structure. This study resolved the high-voltage safety problems that were found in the design phase and thus ensured that the vehicle not only meets the requirements of the Chinese regulations, but also meets the high-voltage safety requirements of US Federal Motor Vehicle Safety Standard (FMVSS) 305 for 80 km/h rear impact.

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