1results about How to "Avoid major security incidents" patented technology

This invention relates to a method for locating overvoltage / undervoltage faults in battery systems, belonging to the field of new energy vehicle technology. The method includes: real-time acquisition of battery system SOC, maximum cell voltage, minimum cell voltage, and total current; when an overvoltage alarm occurs in the battery system, fault location is performed: based on characteristic indicators and their corresponding set thresholds, it is determined whether the fault is due to individual cell damage, unreasonable control strategy, slow current limiting by the charging pile, secondary charging, sampling line problems, current feedback, circulating current, or active balancing; the process for determining each set threshold is as follows: based on a failure case library, a fault tree containing all causes of overvoltage faults is established to obtain training set data; the training set data is input into a decision tree classifier to obtain the characteristic indicators of each overvoltage fault cause and the corresponding set thresholds. This invention provides timely fault location in the event of an alarm, improving battery safety.