Parameterization of a Physico-Chemical Model of a Lithium-Ion Battery I. Determination of Parameters

By Madeleine Ecker, ThiNhung Tran, Philipp Dechent, S. Käbitz, Alexander Warnecke, Dirk Uwe Sauer. 2015

248 citations recorded by the source corpus.

The parameterization of a physico-chemical model constitutes a critical part in model development. Conclusions about the internal stateofabatterycanonlybedrawnifacorrectsetofmaterialparametersisprovidedforthematerialcombinationunderconsideration.Inthiswork,parameterstofullyparameterizeaphysico-chemicalmodelfora7.5AhcellproducedbyKokamaredeterminedandarecomparedwithexistingliteraturevalues.Thepaperpresentsparametervaluesandprocedurestodeterminetheparameters.Cellswereopenedunderargonatmosphereandthegeometricaldataweremeasured.Hg-porosimetrywasconductedtodetermineporosity,particleradiusaswellastortuosityoftheelectrodesandtheseparator.Conductivityanddiffusionconstantsoftheelectrolyteaswellastheelectronicconductivityoftheactivematerialweremeasureddetectingthevoltageresponsetoadccurrent.Finally,electrochemicalmeasurementswereconductedonlaboratory-madecoincellsinordertodetermineopencircuitvoltagecurves, diffusion coefficients and charge transfer kinetics of the electrodes as well as their balancing. In part II of this paper, a physico- chemical model is introduced and a validation of the measured parameter set is given by comparing model results with experiments.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/c716d0fed746e1ba17e5cddf9e8abfb5035c9450