Li-ion Battery Cell Aging Observation based on Impedance Spectroscopy

DOI

10.2991/978-94-6463-423-5_41How to use a DOI?

Keywords

Electrochemical impedance spectroscopy; Li-ion battery; Capacity fade

Abstract

The lithium battery’s state of health is an essential index for characterization. It is crucial, for example, to estimate the range of an electric car. Electrochemical impedance spectroscopy is a relatively simple diagnostic tool for insight into the cell’s internal processes. Impedance spectra can be used to estimate temperature, state of charge, and also the state of health, which is presented in this paper. High power 18650 cells were cycled down to 80% of their original capacity. The impedance spectra were measured at regular intervals during cycling. Impedances were measured separately for each frequency in the range 5 mHz to 5 kHz. A galvanostatic method was used to excite the cells. The parameters of the cell equivalent circuit were identified from the measured set of the impedance spectra. The results show an evident dependence on the ohmic resistance of the current collectors and electrodes, also the dependence of the resistance and capacity of the electrochemical double layer on the number of discharge cycles.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Miroslav Novák
PY  - 2024
DA  - 2024/05/22
TI  - Li-ion Battery Cell Aging Observation based on Impedance Spectroscopy
BT  - Proceedings of the 62nd International Conference of Machine Design Departments (ICMD 2022)
PB  - Atlantis Press
SP  - 363
EP  - 375
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-423-5_41
DO  - 10.2991/978-94-6463-423-5_41
ID  - Novák2024
ER  -