A Control Oriented Comprehensive Degradation Model for Battery Energy Storage System Life Prediction
Abstract
In order to ensure that stationary battery energy storage systems (BESSs) provide reliable energy buffering, both for power quality and economic purposes, the degradation must be considered. Cell degradation involves various side reactions and is highly dependent on its operating conditions. To accurately track cell degradation and predict its impact on battery behavior, a comprehensive physics-based degradation model based on an electrolyte phase-enhanced single particle (SP) model is developed. Key degradation physics, namely solid electrolyte interphase (SEI) layer formation and growth, Li plating on the graphite anode, and Mn dissolution on cathode of nickel-cobalt-manganese oxide (NMC622) are considered. The model is validated against experimental capacity data. The results reveal that the deposition rate of both SEI layer and Li metal increase as the charge voltage increases. At the cathode side, the solvent oxidation rate determines the Mn dissolution rate. As a result, the volume fraction of NMC622 in the cathode continually decreases at a gradually increasing rate.
Recommended Citation
Y. Zhu et al., "A Control Oriented Comprehensive Degradation Model for Battery Energy Storage System Life Prediction," IFAC-PapersOnLine, vol. 54, no. 20, pp. 374 - 380, Elsevier; International Federation of Automatic Control (IFAC), Nov 2021.
The definitive version is available at https://doi.org/10.1016/j.ifacol.2021.11.202
Department(s)
Mechanical and Aerospace Engineering
Publication Status
Full Text Access
Keywords and Phrases
Battery degradation; Battery energy storage system; Li plating; Life prediction; Metal dissolution; SEI layer growth; Single particle model
International Standard Serial Number (ISSN)
2405-8963
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier; International Federation of Automatic Control (IFAC), All rights reserved.
Publication Date
01 Nov 2021
Comments
U.S. Department of Energy, Grant DE-EE0008449