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Article

Incremental Capacity Analysis as a State of Health Estimation Method for Lithium-Ion Battery Modules with Series-Connected Cells

1
DLR Institute of Networked Energy Systems, Carl-von-Ossietzky-Str. 15, 26129 Oldenburg, Germany
2
Department of Chemistry and uYilo, e-Mobility Technology Innovation Programme, Nelson Mandela University, P.O. Box 77000, Port Elizabeth 6001, South Africa
*
Author to whom correspondence should be addressed.
Batteries 2021, 7(1), 2; https://doi.org/10.3390/batteries7010002
Received: 22 October 2020 / Revised: 14 December 2020 / Accepted: 15 December 2020 / Published: 30 December 2020
(This article belongs to the Special Issue Lithium-Ion Batteries Aging Mechanisms)
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. View Full-Text
Keywords: lithium-ion batteries; state-of-health; incremental capacity analysis; battery module lithium-ion batteries; state-of-health; incremental capacity analysis; battery module
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MDPI and ACS Style

Krupp, A.; Ferg, E.; Schuldt, F.; Derendorf, K.; Agert, C. Incremental Capacity Analysis as a State of Health Estimation Method for Lithium-Ion Battery Modules with Series-Connected Cells. Batteries 2021, 7, 2. https://doi.org/10.3390/batteries7010002

AMA Style

Krupp A, Ferg E, Schuldt F, Derendorf K, Agert C. Incremental Capacity Analysis as a State of Health Estimation Method for Lithium-Ion Battery Modules with Series-Connected Cells. Batteries. 2021; 7(1):2. https://doi.org/10.3390/batteries7010002

Chicago/Turabian Style

Krupp, Amelie, Ernst Ferg, Frank Schuldt, Karen Derendorf, and Carsten Agert. 2021. "Incremental Capacity Analysis as a State of Health Estimation Method for Lithium-Ion Battery Modules with Series-Connected Cells" Batteries 7, no. 1: 2. https://doi.org/10.3390/batteries7010002

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