Health Indicator Development for Low-Voltage Battery Diagnostics and Prognostics in Electric Vehicles

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Published Nov 5, 2024
Xinyu Du Huaizheng Mu Kevin Corr Matt Nowak Hong Wong Tung-Wah Frederick Chang Sara Rahimifard

Abstract

Each electric vehicle (EV) requires a low-voltage (e.g., 12V) auxiliary battery to provide electric power to onboard electronic control units, lighting systems, and various sensors during power off. Therefore, when the low-voltage battery is in low state of health (SOH) or low state of charge (SOC), it may cause no-start events. The existing OnStar Proactive Alert service can effectively predict low SOC or low SOH events for low-voltage batteries in Internal Combustion Engine vehicles using cranking signals. However, it does not work for EVs since there is no cranking event. In this work, a diagnostic and prognostic solution for the low-voltage battery of EVs is proposed. Four novel health indicators (HIs) along with the decision-making system are developed based on equivalent circuit models. Furthermore, the selection process of appropriate HIs tailored to various operational states of the vehicle is described. The validation results based on GM test EV data have demonstrated the effectiveness and robustness of the proposed solution.

How to Cite

Du, X., Mu, H., Corr, K., Nowak, M., Wong, H., Chang, T.-W. F., & Rahimifard, S. (2024). Health Indicator Development for Low-Voltage Battery Diagnostics and Prognostics in Electric Vehicles. Annual Conference of the PHM Society, 16(1). https://doi.org/10.36001/phmconf.2024.v16i1.3918
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Keywords

Battery, Diagnostics

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Section
Technical Research Papers

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