Abstract: Combined with the national new energy vehicle fire investigation data collection work, a new energy vehicle fire investigation system based on big data is proposed and developed. The system aims to improve the fire investigation efficiency, early warning capability and safety of fire accidents by integrating multi-source data and applying advanced data analysis technology. The overall architecture of the system is divided into data collection layer, data storage and management layer, data processing and analysis layer, application service layer and user interaction layer. By collecting and analyzing on-board sensor data, external environment data, and accident and maintenance data, the system realizes in-depth mining and correlation analysis of fire causes.

Key words: new energy vehicle, fire investigation system, big data, fire causes