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Title: Online impedance spectroscopy estimation of a battery
Authors: Varnosfaderani, Mina Abedi
Strickland, Dani
Keywords: Batteries
Dc/dc converters
Frequency analysis
Impedance spectroscopy
Issue Date: 2016
Publisher: © IEEE
Citation: VARNOSFADERANI, M.A. and STRICKLAND, D., 2016. Online impedance spectroscopy estimation of a battery. 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe), Karlsruhe, Germany, 5th-9th September 2016.
Abstract: Electrochemical impedance spectroscopy (EIS) is a helpful tool to understand how a battery is behaving and how it degrades. One of the disadvantages is that it is typically an 'off-line' process. This paper investigates an alternative method of looking at impedance spectroscopy of a battery system while it is on-line and operational by manipulating the switching pattern of the dc-dc converter to generate low frequency harmonics in conjunction with the normal high frequency switching pattern to determine impedance in real time. However, this adds extra ripple on the inductor which needs to be included in the design calculations. The paper describes the methodology and presents some experimental results in conjunction with EIS results to illustrate the concept.
Description: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor: The authors would like to thank the EPSRC and Opal-RT for their contribution to this project.
Version: Accepted for publication
DOI: 10.1109/EPE.2016.7695638
URI: https://dspace.lboro.ac.uk/2134/24988
Publisher Link: http://dx.doi.org/10.1109/EPE.2016.7695638
ISBN: 9789075815245
Appears in Collections:Conference Papers and Presentations (Mechanical, Electrical and Manufacturing Engineering)

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