A correlation based detection method for internal short circuit in battery packs
This manuscript proposes a fault detection method for internal short circuits in battery packs based on the correlation coefficient. Compared to the threshold and model based detection algorithms, the proposed method is more robust to inconsistent battery cells, and does not require any preliminary effort in modeling and online identification. In order to implement this method online, a moving window is selected to maintain its high sensitivity to fault occurrence. A square wave is designed to avoid false detections when the battery is at rest. Experiment results validate the feasibility and demonstrate the advantages of the proposed method.