Run to Failure: Aging of Commercial Battery Cells beyond Their End of Life

Andreas Ziegler, David Oeser, Thiemo Hein, Daniel Montesinos-Miracle and Ansgar Ackva
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Andreas Ziegler: Technology Transfer Centre for E-Mobility (TTZ-EMO), University of Applied Sciences Wuerzburg-Schweinfurt, Poststrasse 31, 97616 Bad Neustadt an der Saale, Germany
David Oeser: Technology Transfer Centre for E-Mobility (TTZ-EMO), University of Applied Sciences Wuerzburg-Schweinfurt, Poststrasse 31, 97616 Bad Neustadt an der Saale, Germany
Thiemo Hein: Technology Transfer Centre for E-Mobility (TTZ-EMO), University of Applied Sciences Wuerzburg-Schweinfurt, Poststrasse 31, 97616 Bad Neustadt an der Saale, Germany
Daniel Montesinos-Miracle: Centre d’Innovació Tecnològica en Convertidors Estàtics i Accionaments (CITCEA-UPC), Departament d’Enginyeria Elèctrica, Universitat Politècnica de Catalunya, ETS d’Enginyeria Industrial de Barcelona, Av. Diagonal, 647. Pl. 2 08028 Barcelona, Spain
Ansgar Ackva: Technology Transfer Centre for E-Mobility (TTZ-EMO), University of Applied Sciences Wuerzburg-Schweinfurt, Poststrasse 31, 97616 Bad Neustadt an der Saale, Germany

Energies, 2020, vol. 13, issue 8, 1-11

Abstract: The aim of this work is to age commercial battery cells far beyond their expected lifetime. There is a gap in the literature regarding run to failure tests of lithium-ion batteries that this work intends to address. Therefore, twenty new Samsung ICR18650-26F cells were aged as a battery pack in a run to failure test. Aging took place with a constant load current and a constant charge current to accelerate capacity decrease. Important aging parameters such as capacity and internal resistance were measured at each cycle to monitor their development. The end of the test was initiated by the explosion of a single battery cell, after which the battery pack was disassembled and all parameters of the still intact single cells were measured. The distribution of all measured capacities and internal resistances is displayed graphically. This clearly shows the influence of the exploded cell on the cells in its immediate vicinity. Selected cells from this area of the battery were subjected to computed tomography (CT) to detect internal defects. The X-rays taken with computed tomography showed clear damage within the jelly roll, as well as the triggered safety mechanisms.

Keywords: lithium-ion; run to failure; aging; battery; computed tomography (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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