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

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dc.contributor.advisorBarendse, Paul Stanleyen_ZA
dc.contributor.authorWaligo, Alfreden_ZA
dc.date.accessioned2018-05-25T07:38:54Z
dc.date.available2018-05-25T07:38:54Z
dc.date.issued2018en_ZA
dc.description.abstractElectrochemical 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.en_ZA
dc.identifier.apacitationWaligo, A. (2018). <i>Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering. Retrieved from http://hdl.handle.net/11427/28109en_ZA
dc.identifier.chicagocitationWaligo, Alfred. <i>"Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 2018. http://hdl.handle.net/11427/28109en_ZA
dc.identifier.citationWaligo, A. 2018. Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Waligo, Alfred AB - 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. DA - 2018 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2018 T1 - Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy TI - Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy UR - http://hdl.handle.net/11427/28109 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/28109
dc.identifier.vancouvercitationWaligo A. Condition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopy. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 2018 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/28109en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Electrical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherElectrical Engineeringen_ZA
dc.titleCondition monitoring of lithium-ion batteries using broadband multisine excitation and electrochemical impedance spectroscopyen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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