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Authors = Amelie Krupp ORCID = 0000-0003-1849-4507

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13 pages, 1988 KiB  
Article
Incremental Capacity Analysis as a State of Health Estimation Method for Lithium-Ion Battery Modules with Series-Connected Cells
by Amelie Krupp, Ernst Ferg, Frank Schuldt, Karen Derendorf and Carsten Agert
Batteries 2021, 7(1), 2; https://doi.org/10.3390/batteries7010002 - 30 Dec 2020
Cited by 55 | Viewed by 9368
Abstract
Incremental capacity analysis (ICA) has proven to be an effective tool for determining the state of health (SOH) of Li-ion cells under laboratory conditions. This paper deals with an outstanding challenge of applying ICA in practice: the evaluation of battery series connections. The [...] Read more.
Incremental capacity analysis (ICA) has proven to be an effective tool for determining the state of health (SOH) of Li-ion cells under laboratory conditions. This paper deals with an outstanding challenge of applying ICA in practice: the evaluation of battery series connections. The study uses experimental aging and characterization data of lithium iron phosphate (LFP) cells down to 53% SOH. The evaluability of battery series connections using ICA is confirmed by analytical and experimental considerations for cells of the same SOH. For cells of different SOH, a method for identifying non-uniform aging states on the modules’ IC curve is presented. The findings enable the classification of battery modules with series and parallel connections based on partial terminal data. Full article
(This article belongs to the Special Issue Lithium-Ion Batteries Aging Mechanisms)
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