An Optimal Fast-Charging Strategy for Lithium-Ion Batteries via an Electrochemical–Thermal Model with Intercalation-Induced Stresses and Film Growth

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 li...

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Bibliographic Details
Published in:Energies (Basel) Vol. 13; no. 9; p. 2388
Main Authors: Chen, Guangwei, Liu, Zhitao, Su, Hongye
Format: Journal Article
Language:English
Published: Basel MDPI AG 01.05.2020
Subjects:
Aging
Control algorithms
Control theory
electrochemical–thermal model
Electrolytes
fast charging
Lithium
lithium-ion battery
Optimization
Partial differential equations
Researchers
ISSN:1996-1073, 1996-1073
Online Access:Get full text
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Summary: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.
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ISSN:1996-1073
1996-1073
DOI:10.3390/en13092388