EIS-Based Hysteresis Modelling of LFP Cells

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dc.contributor.authorThenaisie, Guillaume
dc.contributor.authorBrivio, Claudio
dc.date.accessioned2024-08-23T12:02:58Z
dc.date.available2024-08-23T12:02:58Z
dc.date.issued2023-06-29
dc.description.abstractBased on recent advances in non-equilibrium thermodynamics, a new approach to the modelling of the hysteresis of LiFePO4 is proposed. A method for characterising the hysteresis based on electrochemical impedance spectroscopy (EIS) is presented, which allows to reduce the characterization time from multiples weeks to few days. The results show that hysteresis in LiFePO4 is a very slow relaxation process strongly correlated with prior works results in crystalline phase transitions. An Electrical Circuit Model (ECM) of the cell is then extracted by using the distribution of relaxation times (DRT) on the EIS profile of the cell. The extracted DRT parameters show good agreement at low frequencies with previous thermodynamic studies. The performances of the ECM is compared with state of art physics-based ECM (without hysteresis compensation) and show an RMSE reduction of four fold under dynamic cycling. © 2023 IEEE.
dc.identifier.citation2023 International Conference on Clean Electrical Power, ICCEP 2023, Pages 372 - 377, International Conference on Clean Electrical Power, ICCEP 2023, Terrasini
dc.identifier.doi10.1109/ICCEP57914.2023.10247419
dc.identifier.isbn979-835034837-8
dc.identifier.urihttps://hdl.handle.net/20.500.12839/1482
dc.language.isoen
dc.titleEIS-Based Hysteresis Modelling of LFP Cells
dc.typeConference
dc.type.csemdivisionsBU-V
dc.type.csemresearchareasSolar Cells and Module
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