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POLISOC: A hybrid state of charge estimation algorithm for lithium-ion batteries based on electrical and mechanical measurements

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  • Clerici, Davide

Abstract

The state of charge of lithium-ion batteries reflects the concentration of lithium ions in the respective electrodes. Since this quantity cannot be directly measured during operation, the state of charge can only be inferred through indirect measurements (voltage and current traditionally) and estimation algorithms. This inevitably introduces uncertainty, arising from sensor errors and from the limited accuracy of the algorithms under varying operating conditions. These limitations are particularly severe in chemistries such as LFP, where the flat voltage profile limits the effectiveness of voltage-based algorithms, as well as under conditions where voltage model parameters vary, such as changes in operating temperature or aging.

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  • Clerici, Davide, 2025. "POLISOC: A hybrid state of charge estimation algorithm for lithium-ion batteries based on electrical and mechanical measurements," Applied Energy, Elsevier, vol. 401(PC).
    • Handle: RePEc:eee:appene:v:401:y:2025:i:pc:s0306261925014709
    DOI: 10.1016/j.apenergy.2025.126740
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    References listed on IDEAS

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    1. Pistorio, Francesca & Clerici, Davide & Somà, Aurelio, 2026. "POLIDEMO: An electrochemical-mechanical framework for modeling lithium-ion batteries degradation," Applied Energy, Elsevier, vol. 404(C).

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