High-Voltage Safety Improvement Design for Electric Vehicle in Rear Impact

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.