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Investigation of the Effective Thermal Conductivity of Cell Stacks of Li‐Ion Batteries

Oehler, Dieter; Bender, Jonas; Seegert, Philipp; Wetzel, Thomas

Abstract:
Knowledge of the thermal transport properties of the individual battery components and their combination is required for the design of thermally optimized lithium‐ion batteries. Based on this, the limiting components can be identified and potentially improved. In this contribution, the microstructures of commercial porous electrode coatings, electrode stacks, and cell stacks are reconstructed based on experimentally determined structure parameters using a specifically developed structure generation routine. The effective thermal conductivity of the generated stacked structures is then determined by a numerical tool developed in‐house based on the finite‐volume method. The results are compared with an analytical model for fast accurate predictions which takes the morphological parameter sets and the geometry of the stacks into account. Both models are used to identify the system‐limiting components via selected simulation studies. Finally, the results of both models are compared with experimental data for commercial electrode stacks and common literature values for cell stacks.

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Verlagsausgabe §
DOI: 10.5445/IR/1000126902
Veröffentlicht am 27.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Verfahrenstechnik (TVT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2194-4288, 2194-4296
KITopen-ID: 1000126902
Erschienen in Energy technology
Seiten 2000722
Vorab online veröffentlicht am 02.10.2020
Nachgewiesen in Web of Science
Scopus
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