Print Email Facebook Twitter Data-Driven Fault Diagnosis of Lithium-Ion Battery Overdischarge in Electric Vehicles Title Data-Driven Fault Diagnosis of Lithium-Ion Battery Overdischarge in Electric Vehicles Author Gan, Naifeng (Beijing Institute of Technology) Sun, S.Z. (Beijing Institute of Technology) Zhang, Zhaosheng (Beijing Institute of Technology) Xu, Shiqi (Beijing Institute of Technology) Liu, Peng (Beijing Institute of Technology) Qin, Z. (TU Delft DC systems, Energy conversion & Storage) Date 2022 Abstract The overdischarge can significantly degrade a lithium-ion (Li-ion) battery's lifetime. Therefore, it is important to detect the overdischarge and prevent severe damage of the Li-ion battery. Depending on the battery technology, there is a minimum voltage (cutoff voltage) that the battery is allowed to be discharged in common practice. Once the battery voltage is below the cutoff voltage, it is considered as overdischarge. However, overdischarge will not lead to immediate failure of the battery, and if it is not detected, the battery voltage can increase above the cutoff voltage during charging process. How to detect an overdischarge has happened, while the current voltage is larger than the cutoff voltage, thus becomes very challenging. In this article, a machine learning based two-layer overdischarge fault diagnosis strategy for Li-ion batteries in electric vehicles is proposed. The first layer is to detect the overdischarge by comparing the battery voltage with cutoff voltage, like what is utilized in common practice. If the battery voltage is larger than the cutoff voltage, the second layer, which is a detection approach based on eXtreme Gradient Boosting algorithm, is triggered. The second layer is employed to detect the previous overdischarge. The proposed method is validated by real electric vehicle data. Subject Electric vehicle (EVS)extreme gradient boosting (XGboost)fault diagnosislithium-ion battery (LIB)overdischarge To reference this document use: http://resolver.tudelft.nl/uuid:a17e1e76-90a2-4db2-9e30-230155679c2a DOI https://doi.org/10.1109/TPEL.2021.3121701 ISSN 1941-0107 Source IEEE Transactions on Power Electronics, 37 (4), 4575-4588 Part of collection Institutional Repository Document type journal article Rights © 2022 Naifeng Gan, S.Z. Sun, Zhaosheng Zhang, Shiqi Xu, Peng Liu, Z. Qin Files PDF AAM_VERSION.pdf 1.92 MB Close viewer /islandora/object/uuid:a17e1e76-90a2-4db2-9e30-230155679c2a/datastream/OBJ/view