Journal Article

FZJ-2022-04843

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Comparison of battery electromotive-force measurement and modelling approaches

Hoekstra, F. S. J. (Corresponding author) ; Raijmakers, L. H. J.FZJ* ; Donkers, M. C. F. ; Bergveld, H. J.

2022
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/32695  doi:10.1016/j.est.2022.105910

Abstract: In this paper, different approaches for obtaining a battery Electromotive-Force (EMF) model, also referred to as Open-Circuit Voltage, are compared by experimentally measuring them and by subsequently applying different post-processing strategies, thus resulting in different EMF model realisations. The considered methods include GITT, interpolation of charge and discharge curves and extrapolation to zero current. The experiments are performed for two cells, namely a Lithium Nickel–Manganese–Cobalt (NMC) and a Lithium iron-Phosphate (LFP) cell. The accuracy of the EMF models is compared visually, as well as quantitatively in terms of voltage prediction accuracy using a linear parameter-varying overpotential model and SoC estimation accuracy using an extended Kalman filter. The results show that different methods excel at different performance indicators, for instance most accurate or least experiment time, but overall extrapolation to zero current has the best all-round performance.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 1223 - Batteries in Application (POF4-122) (POF4-122)

Appears in the scientific report 2022

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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