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Lookup NU author(s): Ama Asiedu-AsanteORCiD, Professor Volker Pickert, Professor Mohamed MamloukORCiD, Professor Harris Tsimenidis
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Monitoring battery aging is crucial for maintaining reliability and performance. This study investigates Frequency Domain Reflectometry (FDR) as a tool for monitoring lithium-ion battery State-of-Health (SoH). While FDR has been applied in battery research, the existing literature fails to address SoH assessment and lacks studies on larger battery samples to provide more meaningful results. In this work, nineteen cells initially underwent Electrochemical Impedance Spectroscopy (EIS) to assess their degradation levels during cyclic aging. This work evaluates FDR’s effectiveness in monitoring battery health indicators, such as capacity and equivalent series resistance (ESR), by correlating these with FDR-measured impedance between 300 kHz and 1 GHz. Analytical comparison between impedance measured before and after de-embedding processes were presented. The results show FDR reactance within 300 kHz–40 MHz correlates with EIS-measured ESR, suggesting its potential as a SoH indicator. However, reduced sensitivity and accuracy, particularly after de-embedding, may limit practical applicability. Additionally, resonance-based analysis was conducted to explore the relationship between changes in circuit resonance and cell dielectric permittivity. Despite having the lowest sensitivity, the method showed that the resonance frequencies of cells remain relatively constant, mirroring behaviours associated with changes in resistive properties. Overall, this study provides insights into FDR’s potential for battery diagnostics while highlighting avenues for future research to enhance effectiveness in real-world scenarios.
Author(s): Asiedu-Asante AB, Pickert V, Mamlouk M, Tsimenidis C
Publication type: Article
Publication status: Published
Journal: Batteries
Year: 2024
Volume: 10
Issue: 6
Online publication date: 28/05/2024
Acceptance date: 23/05/2024
Date deposited: 03/06/2024
ISSN (electronic): 2313-0105
Publisher: MDPI
URL: https://doi.org/10.3390/batteries10060185
DOI: 10.3390/batteries10060185
Data Access Statement: The original contributions presented in this study are included in the article; further inquiries can be directed to the authors.
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