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An experimentally-verified thermal-electrochemical simulation model of a 21700 cell using a lumped semi-empirical battery model
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Sarmadian, Alireza, Yu, Yifei, Marco, James, Shollock, Barbara A. and Restuccia, Francesco (2022) An experimentally-verified thermal-electrochemical simulation model of a 21700 cell using a lumped semi-empirical battery model. In: 6th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2022), Virtual conference, 08-10 Aug 2022. Published in: Proceedings of 16th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics pp. 128-133. ISBN 9780797218864.
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WRAP-Experimentally-verified-thermal-electrochemical-simulation-model-21700-2022.pdf - Accepted Version - Requires a PDF viewer. Download (949Kb) | Preview |
Abstract
This paper addresses, for the first time, lumped electrochemical-thermal coupled model requirements for the core temperature prediction of a cylindrical 21700 cell. This approach reduces the total number of necessary input parameters in comparison with fully physics-based models. A Newman P2D or a Newman simplified electrochemical model of Single Particle (SP) require approximately 40 and 20 parameters. By contrast, the lumped semi-empirical electrochemical-thermal model approach uses 3 fitting and 10 input parameters, simplifying the detailed knowledge required and also enabling the reduction of the load on the battery management system. COMSOL Multiphysics has been used to achieve a coupled electrochemical-thermal model which is both accurate and with fast response (computation time: ~18 seconds) in the prediction of 21700 NMC/Si-Graphite cell potentials and core temperatures. The fitting parameters of dimensionless charge exchange, the ohmic overpotential at 1C, and the diffusion time for the calibrated model were obtained using the experimental battery data at 1C. The model is validated against a different set of data for discharge tests at 0.3 and 0.7 C-rates. These include experimental cell potential curves and core temperature measurements by using a fibre optic sensing system. Results showed that the standard deviations obtained for the cell voltage and the core temperature are respectively 0.12 V and 0.8 K.
| Item Type: | Conference Item (Paper) | |||||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
| Library of Congress Subject Headings (LCSH): | Lithium ion batteries, Lithium ion batteries -- Temperature control, Battery management systems , Electric batteries -- Electrodes | |||||||||
| Journal or Publication Title: | Proceedings of 16th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics | |||||||||
| Publisher: | American Society of Thermal and Fluids Engineers | |||||||||
| ISBN: | 9780797218864 | |||||||||
| Official Date: | 8 August 2022 | |||||||||
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| Page Range: | pp. 128-133 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||
| Copyright Holders: | HEFAT | |||||||||
| Date of first compliant deposit: | 16 June 2022 | |||||||||
| Date of first compliant Open Access: | 14 October 2022 | |||||||||
| RIOXX Funder/Project Grant: |
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| Conference Paper Type: | Paper | |||||||||
| Title of Event: | 6th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2022) | |||||||||
| Type of Event: | Conference | |||||||||
| Location of Event: | Virtual conference | |||||||||
| Date(s) of Event: | 08-10 Aug 2022 | |||||||||
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