Vehicle high-voltage power supply loop fault processing method and system, vehicle and equipment
By detecting the DC bus voltage and the communication status of the battery management system through the motor controller, faults in the high-voltage power supply circuit of the electric vehicle can be identified, and fault protection can be implemented. This solves the problem of high-voltage power outage in electric vehicles under harsh environments, achieves rapid detection and protection, and ensures system safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING AUTOMOBILE RES GENERAL INST
- Filing Date
- 2026-04-17
- Publication Date
- 2026-07-17
AI Technical Summary
When electric vehicles are subjected to harsh environments such as high voltage, high current, high temperature, strong electromagnetic interference, and strong vibration, the high voltage relay disconnects when the battery management system is reset and restarted, causing the high voltage of the entire vehicle to be cut off, communication messages to stop being sent, the status to be uncertain, and endangering the safety of the entire vehicle and its components.
By detecting the DC bus voltage through the motor controller, overvoltage or undervoltage faults can be identified. Combined with the communication status of the battery management system, the fault type of the high-voltage power supply circuit can be determined, and fault protection measures can be implemented, including the motor controller entering a safe state, detecting communication abnormalities, feeding back fault information to the vehicle controller, and implementing corresponding fault control strategies.
It achieves rapid fault detection and protection, ensures system safety, is easy to implement, has a wide range of applications, has good promotional value, and meets the needs of driving safety.
Smart Images
Figure CN122402241A_ABST