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Inhomogeneous Temperature Distribution Affecting the Cyclic Aging of Li-Ion Cells. Part I: Experimental Investigation

Werner, Daniel; Paarmann, Sabine; Wiebelt, Achim; Wetzel, Thomas

Abstract:
Alongside electrical loads, it is known that temperature has a strong influence on battery behavior and lifetime. Investigations have mainly been performed at homogeneous temperatures and non-homogeneous conditions in single cells have at best been simulated. This publication presents the development of a methodology and experimental setup to investigate the influence of thermal boundary conditions during the operation of lithium-ion cells. In particular, spatially inhomogeneous and transient thermal boundary conditions and periodical electrical cycles were superimposed in different combinations. This required a thorough design of the thermal boundary conditions applied to the cells. Unlike in other contributions that rely on placing cells in a climatic chamber to control ambient air temperature, here the cell surfaces and tabs were directly connected to individual cooling and heating plates. This improves the control of the cells’ internal temperature, even with high currents accompanied by strong internal heat dissipation. The aging process over a large number of electrical cycles is presented by means of discharge capacity and impedance spectra determined in repeated intermediate characterizations. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000118144
Veröffentlicht am 08.04.2020
Originalveröffentlichung
DOI: 10.3390/batteries6010013
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Verfahrenstechnik (TVT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2313-0105
KITopen-ID: 1000118144
Erschienen in Batteries
Band 6
Heft 1
Seiten Art. Nr.: 13
Vorab online veröffentlicht am 14.02.2020
Schlagwörter lithium-ion cell, cyclic aging; low temperature aging, inhomogeneous temperature, transient temperature, high power pouch cell
Nachgewiesen in Scopus
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