Lithium-Ion Battery Health Prognosis Based on a Real Battery Management System Used in Electric Vehicles
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- 9 August 2018
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Vehicular Technology
- Vol. 68 (5), 4110-4121
- https://doi.org/10.1109/tvt.2018.2864688
Abstract
This paper developed an effective health indicator to indicate lithium-ion battery state of health and moving-window-based method to predict battery remaining useful life. The health indicator was extracted based on the partial charge voltage curve of cells. Battery remaining useful life was predicted using a linear aging model constructed based on the capacity data within a moving window, combined with Monte Carlo simulation to generate prediction uncertainties. Both the developed capacity estimation and remaining useful life prediction methods were implemented based on a real battery management system used in electric vehicles. Experimental data for cells tested at different current rates, including 1C and 2C, and different temperatures, including 25 °C and 40 °C, was collected and used. The implementation results show that the capacity estimation errors were within 1.5%. During the last 20% of battery lifetime, the root mean square errors of remaining useful life predictions were within 20 cycles, and the 95% confidence intervals mainly cover about 20 cycles.Keywords
Funding Information
- National Natural Science Foundation of China (51507012, 51507150)
- Beijing Municipal Natural Science Foundation (3182035)
- National Key Research and Development Program of China (2017YFB0103802)
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