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Electrical Engineering and Systems Science > Systems and Control

arXiv:2205.12008 (eess)
[Submitted on 20 May 2022]

Title:Core-shell enhanced single particle model for LiFePO$_4$ batteries

Authors:Aki Takahashi, Gabriele Pozzato, Anirudh Allam, Vahid Azimi, Xueyan Li, Donghoon Lee, Johan Ko, Simona Onori
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Abstract:In this paper, a novel electrochemical model for LiFePO$_4$ battery cells that accounts for the positive particle lithium intercalation and deintercalation dynamics is proposed. Starting from the enhanced single particle model, mass transport and balance equations along with suitable boundary conditions are introduced to model the phase transformation phenomena during lithiation and delithiation in the positive electrode material. The lithium-poor and lithium-rich phases are modeled using the core-shell principle, where a core composition is encapsulated with a shell composition. The coupled partial differential equations describing the phase transformation are discretized using the finite difference method, from which a system of ordinary differential equations written in state-space representation is obtained. Finally, model parameter identification is performed using experimental data from a 49Ah LFP pouch cell.
Subjects: Systems and Control (eess.SY)
Cite as: arXiv:2205.12008 [eess.SY]
  (or arXiv:2205.12008v1 [eess.SY] for this version)
  https://doi.org/10.48550/arXiv.2205.12008
Related DOI: https://doi.org/10.23919/ACC53348.2022.9867490

Submission history

From: Gabriele Pozzato [view email]
[v1] Fri, 20 May 2022 06:24:57 UTC (439 KB)
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