Online impedance spectroscopy estimation of a battery

M.A. Varnosfaderani, D. Strickland

Research output: Chapter in Book/Published conference outputConference publication

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.

Original languageEnglish
Title of host publication2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe
PublisherIEEE
ISBN (Electronic)978-907-581524-5
DOIs
Publication statusPublished - 25 Oct 2016
Event18th European Conference on Power Electronics and Applications - Karlsruhe, Germany
Duration: 5 Sep 20169 Sep 2016

Conference

Conference18th European Conference on Power Electronics and Applications
Abbreviated titleEPE 2016 ECCE Europe
CountryGermany
CityKarlsruhe
Period5/09/169/09/16

Bibliographical note

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Keywords

  • batteries
  • DC/DC converters
  • frequency analysis
  • impedance spectroscopy

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