Estimating the Equivalent Circuit of Lithium-Ion Batteries During Operation

Vašíček, Jakub; Vyroubal, Petr

Estimating the Equivalent Circuit of Lithium-Ion Batteries During Operation

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117-eeict-2024-II.pdf(1.25 MB)

Date

2024

Authors

Vašíček, Jakub

Vyroubal, Petr

Publisher

Vysoké učení technické v Brně, Fakulta elektrotechniky a komunikačních technologií

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Abstract

This paper deals with the issue of estimating the equivalent circuit of lithium-ion cells during normal operation. The study explores fundamental battery models, such as the simplified Randles circuit and the full Randles circuit. Conventional methods for model estimation, including Electrochemical Impedance Spectroscopy (EIS) and Galvanostatic Intermittent Titration Technique (GITT) are examined. The research extends into the real-world data analysis, gained from a home photovoltaic system. Using these data, an algorithm to estimate the equivalent circuit model during battery operation is evaluated. The study investigates the correlation between the proposed algorithm's outcomes and results obtained through EIS and GITT methods.

Keywords

lithium-ion batteries, battery cell model, Randles circuit, EIS, GITT, SoC, SoH, BMS

Citation

Proceedings II of the 30st Conference STUDENT EEICT 2024: Selected papers. s. 117-120. ISBN 978-80-214-6230-4
https://www.eeict.cz/eeict_download/archiv/sborniky/EEICT_2024_sbornik_2.pdf

Document type

Peer-reviewed

Document version

Published version

Language of document

en

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