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- Title
An Optimal Fast-Charging Strategy for Lithium-Ion Batteries via an Electrochemical–Thermal Model with Intercalation-Induced Stresses and Film Growth.
- Authors
Chen, Guangwei; Liu, Zhitao; Su, Hongye
- Abstract
Optimal fast charging is an important factor in battery management systems (BMS). Traditional charging strategies for lithium-ion batteries, such as the constant current–constant voltage (CC–CV) pattern, do not take capacity aging mechanisms into account, which are not only disadvantageous in the life-time usage of the batteries, but also unsafe. In this paper, we employ the dynamic optimization (DP) method to achieve the optimal charging current curve for a lithium-ion battery by introducing limits on the intercalation-induced stresses and the solid–liquid interface film growth based on an electrochemical–thermal model. Furthermore, the backstepping technique is utilized to control the temperature to avoid overheating. This paper concentrates on solving the issue of minimizing charging time in a given target State of Charge (SoC), while limiting the capacity loss caused by intercalation-induced stresses and film formation. The results indicate that the proposed optimal charging method in this paper offers a good compromise between the charging time and battery aging.
- Subjects
LITHIUM-ion batteries; BATTERY management systems; SOLID-liquid interfaces; TEMPERATURE control; ELECTRIC capacity
- Publication
Energies (19961073), 2020, Vol 13, Issue 9, p2388
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en13092388