Fault judging and processing method of battery management system, control system and vehicle

By monitoring battery operating parameters in real time to determine BMS faults and switch power sources, the problem of power interruption in hybrid vehicles caused by BMS communication loss is solved, ensuring safe and stable vehicle operation and battery health.

CN121716682APending Publication Date: 2026-03-24GREAT WALL MOTOR CO LTD
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Patent Information

Application Number
CN202511991957.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-26
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

The battery management system (BMS) of hybrid vehicles is susceptible to complex driving environments, electromagnetic interference, hardware failures or software anomalies, which may lead to communication loss, power interruption, over-discharge or over-charge of the battery, and affect driving safety and reliability.

Method used

By monitoring whether the battery operating parameters change within a set monitoring period in real time, BMS faults can be identified. In the event of a fault, the power source can be switched to engine drive to limit the battery's charging and discharging power, avoid overcharging and discharging, and ensure safe vehicle operation.

Benefits of technology

It enables timely identification and switching of the power source when the BMS fails, avoiding vehicle power interruption, ensuring continuous and stable driving and safety, and improving driving reliability and intelligence level.

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Abstract

The invention relates to a fault judging and processing method of a battery management system, a control system and a vehicle, relates to the technical field of vehicle battery management systems, and is applied to hybrid vehicles. The fault judging and processing method comprises the following steps that working parameters of a battery are obtained in real time in the vehicle running process; judging whether the working parameters of the battery change in the set monitoring period or not; if the working parameters of the battery change in the monitoring period, judging that the battery management system is normal; if the working parameters of the battery do not change in the monitoring period, it is judged that the battery management system breaks down, and an engine is controlled to drive the vehicle to run. Whether the working parameters of the battery change in the monitoring period is used as a basis for judging whether the battery management system breaks down or not, the engine is used for driving the vehicle to run when the battery management system breaks down, and adverse consequences caused by sudden power loss of the vehicle are avoided.
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