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  4. Simulation of lithium plating due to spatial inhomogeneous separator strain in lithium-ion-cells
 
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2019
Conference Paper
Title

Simulation of lithium plating due to spatial inhomogeneous separator strain in lithium-ion-cells

Abstract
The electrodes and especially the separator of a lithium-ion-cell are exposed to mechanical stress due to expansion of electrode materials during operation if the electrodes are integrated in a stiff cell casing e.g. in a 18650 cell. As a result, the porosity and therefore the lithium-diffusion characteristics are altered. In this paper a simulative study of spatially resolved effects from inhomogeneous separator porosity reduction induced by mechanical strain is presented. The findings show significantly changed spatial current densities and local anode voltage potentials that match findings of post-mortem investigations.
Author(s)
Ebert, F.
Oberbauer, A.
Cabanero, M.A.
Sextl, G.
Lienkamp, M.
Mainwork
31st International Electric Vehicle Symposium & Exhibition and International Electric Vehicle Technology Conference (EVS 31 & EVTeC 2018)  
Conference
International Electric Vehicle Symposium & Exhibition (EVS) 2018  
International Electric Vehicle Technology Conference (EVTeC) 2018  
Language
English
Fraunhofer-Institut für Silicatforschung ISC  
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