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Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy

Electrochemical Impedance Spectroscopy (EIS) is a well-known technique that has been employed on various electrochemical cells to obtain their impedance spectra. Lithium-ion(Li-ion) cells are some of the cells to which it has been applied. The impedance spectra obtained from EIS can be used to estim...

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Main Author: Waligo, Alfred
Other Authors: Barendse, Paul Stanley
Format: Thesis
Language:English
Published: Department of Electrical Engineering 2018
Subjects:
Electrical Engineering
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access_status_str Open Access
author Waligo, Alfred
author2 Barendse, Paul Stanley
author_browse Barendse, Paul Stanley
Waligo, Alfred
author_facet Barendse, Paul Stanley
Waligo, Alfred
author_sort Waligo, Alfred
collection Thesis
description Electrochemical Impedance Spectroscopy (EIS) is a well-known technique that has been employed on various electrochemical cells to obtain their impedance spectra. Lithium-ion(Li-ion) cells are some of the cells to which it has been applied. The impedance spectra obtained from EIS can be used to estimate various batteries State of Health (SOH) and State of Charge (SOC) characteristics. The lengthy acquisition time associated with standard EIS makes it unsuitable for rapid on-line impedance measurements. Alternative methods that take a shorter time have therefore been proposed. This study compares the spectra obtained by the Harmonic Compensated Synchronous Detection (HCSD) broadband signal technique with the EIS and a custom Broadband Impedance Spectroscopy (BIS) technique, at different states of charge, which mimic a real-time load. The test cells are industry standard Nickel-Cobalt and Manganese Oxide (NCM) Li-ion cells. The BIS technique is like HCSD in the selection of frequencies; however, the amplitude of the excitation broadband signal is varied to match the impedance magnitude response of the cell. Also, parameter extraction is performed on both EIS and BIS techniques for fault detection purposes.
format Thesis
id oai:open.uct.ac.za:11427/28109
institution University of Cape Town (South Africa)
language eng
last_indexed 2026-06-10T12:51:59.217Z
license_str Not specified — see source repository
provenance_str_mv Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository
publishDate 2018
publishDateRange 2018
publishDateSort 2018
publisher Department of Electrical Engineering
publisherStr Department of Electrical Engineering
record_format dspace
source_str UCTD — University of Cape Town Open Access Repository
spelling oai:open.uct.ac.za:11427/28109 Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy Waligo, Alfred Barendse, Paul Stanley Electrical Engineering Electrochemical Impedance Spectroscopy (EIS) is a well-known technique that has been employed on various electrochemical cells to obtain their impedance spectra. Lithium-ion(Li-ion) cells are some of the cells to which it has been applied. The impedance spectra obtained from EIS can be used to estimate various batteries State of Health (SOH) and State of Charge (SOC) characteristics. The lengthy acquisition time associated with standard EIS makes it unsuitable for rapid on-line impedance measurements. Alternative methods that take a shorter time have therefore been proposed. This study compares the spectra obtained by the Harmonic Compensated Synchronous Detection (HCSD) broadband signal technique with the EIS and a custom Broadband Impedance Spectroscopy (BIS) technique, at different states of charge, which mimic a real-time load. The test cells are industry standard Nickel-Cobalt and Manganese Oxide (NCM) Li-ion cells. The BIS technique is like HCSD in the selection of frequencies; however, the amplitude of the excitation broadband signal is varied to match the impedance magnitude response of the cell. Also, parameter extraction is performed on both EIS and BIS techniques for fault detection purposes. 2018-05-25T07:38:54Z 2018-05-25T07:38:54Z 2018 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/28109 eng application/pdf Department of Electrical Engineering Faculty of Engineering and the Built Environment University of Cape Town
spellingShingle Electrical Engineering
Waligo, Alfred
Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy
thesis_degree_str Master's
title Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy
title_full Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy
title_fullStr Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy
title_full_unstemmed Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy
title_short Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy
title_sort condition monitoring of lithium ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy
topic Electrical Engineering
url http://hdl.handle.net/11427/28109
work_keys_str_mv AT waligoalfred conditionmonitoringoflithiumionbatteriesusingbroadbandmultisineexcitationandelectrochemicalimpedancespectroscopy

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