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      Analysis of errors in zero-free-parameter modeling approach to predict the voltage of electrochemical energy storage systems under arbitrary load

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      Author
      Ulgut, Burak
      Uzundal, Can Berk
      Özdemir, Elif
      Date
      2017
      Source Title
      ECS Transactions
      Print ISSN
      1938-6737
      Publisher
      Electrochemical Society
      Volume
      77
      Issue
      11
      Pages
      99 - 104
      Language
      English
      Type
      Conference Paper
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      Abstract
      In a recently published article (J. Electrochem. Soc. 164 (2017) A1274-A1280), we described a new method to predict the voltage response of electrochemical energy storage systems during arbitrary load profiles. Our work shows that the impedance spectrum can be employed in the frequency domain in order to ultimately calculate the time domain behavior of the electrochemical energy storage system. The big advantage of this method is the fact that there are no free parameters and fits throughout. The present work deals with the sources of error in the above-mentioned prediction approach and looks for the effects of the various sources of error. The current analysis concludes that two big contributors to the overall error are the inaccuracies in the DC part of the prediction and the non-linearities that are not modeled by a linear impedance spectrum. Discussions are also made regarding ways to improve the performance of the modeling approach the most and where future work is going to be looking to improve.
      Keywords
      Energy storage
      Forecasting
      Frequency domain analysis
      Current analysis
      Electrochemical energy storage
      Free parameters
      Frequency domains
      Impedance spectrum
      Load profiles
      Model approach
      Voltage response
      Time domain analysis
      Permalink
      http://hdl.handle.net/11693/37556
      Published Version (Please cite this version)
      http://dx.doi.org/10.1149/07711.0099ecst
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