Optimal Charging Profiles with Minimal Intercalation-Induced Stresses for Lithium-Ion Batteries Using Reformulated Pseudo 2-Dimensional Models
Author(s)Suthar, Bharatkumar; Northrop, Paul W. C.; Braatz, Richard D.; Subramanian, Venkat R.
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This paper illustrates the application of dynamic optimization in obtaining the optimal current profile for charging a lithium-ion battery by restricting the intercalation-induced stresses to a pre-determined limit estimated using a pseudo 2-dimensional (P2D) model. This paper focuses on the problem of maximizing the charge stored in a given time while restricting capacity fade due to intercalation-induced stresses. Conventional charging profiles for lithium-ion batteries (e.g., constant current followed by constant voltage or CC-CV) are not derived by considering capacity fade mechanisms, which are not only inefficient in terms of life-time usage of the batteries but are also slower by not taking into account the changing dynamics of the system.
DepartmentMassachusetts Institute of Technology. Department of Chemical Engineering
Journal of the Electrochemical Society
Suthar, B., P. W. C. Northrop, R. D. Braatz, and V. R. Subramanian. “Optimal Charging Profiles with Minimal Intercalation-Induced Stresses for Lithium-Ion Batteries Using Reformulated Pseudo 2-Dimensional Models.” Journal of the Electrochemical Society 161, no. 11 (October 2, 2014): F3144–F3155.
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