Fault detection for battery management systems

摘要

A battery management system includes multiple sensors, status detection circuitry, and fault detection circuitry. The sensors sense statuses of a battery pack. The status detection circuitry detects whether the battery pack is in a normal condition based on the statuses to generate a detection result. The fault detection circuitry detects whether a fault is present in the battery pack. The sensors include a current sensor that senses a battery current of the battery pack. The fault detection circuitry includes a detection circuit that monitors a rate of change of a voltage at a terminal of the battery pack, and detects whether a fault is present in the current sensor based on a result of a comparison between the rate of change and a threshold and based on the detection result.