Accelerated impedance-based aging modeling for NCA/Gr-SiOx batteries and the impact of reduced test duration

Cell Reports Physical Science, vol. 6, pp. 102654

Abstract

Aging models are essential for evaluating the aging behavior of lithium-ion batteries (LIBs) and guiding industry decisions on warranty commitments. This study presents an open-source impedance-based aging model for a nickel cobalt aluminum/silicon oxide-graphite LIB. The model accurately predicts capacity loss across various stress factors, achieving less than 1% deviation from validation measurements in real-world driving scenarios. Traditional modeling approaches require extensive testing and parameterization, making the assessment of new cell designs time consuming and costly. To address this issue, optimized testing strategies are developed through sensitivity analysis, revealing significant potential to reduce testing efforts by focusing on key stress factors such as temperature for calendar aging and depth of discharge for cyclic aging. Additionally, using fractional portions of available aging data suggests that test durations of 90 days may be sufficient to achieve reliable results.

Authors 6

1. Ahmed Chahbaz corresponding Aachen Center for Aging Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives (ISEA)

   Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   Center for Aging, Reliability and Lifetime Prediction of Electrochemical and Power Electronic Systems, RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany

   Chair for Electrochemical Energy Conversion and Storage Systems, Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany

   Jülich Aachen Research Alliance, JARA-Energy, Templergraben 55, 52056 Aachen, Germany

2. Markus Schreiber

   Technical University of Munich

   Affiliation as printed

   Technical University of Munich (TUM), School of Engineering & Design, Department of Mobility Systems Engineering, Institute of Automotive Technology, Munich, Germany

3. Jonas Rinner Aachen Center for Aging Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives (ISEA)

   Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   Center for Aging, Reliability and Lifetime Prediction of Electrochemical and Power Electronic Systems, RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany

   Chair for Electrochemical Energy Conversion and Storage Systems, Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany

   Jülich Aachen Research Alliance, JARA-Energy, Templergraben 55, 52056 Aachen, Germany

4. Gereon Karsten Stahl Aachen Center for Aging Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives (ISEA)

   Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   Center for Aging, Reliability and Lifetime Prediction of Electrochemical and Power Electronic Systems, RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany

   Chair for Electrochemical Energy Conversion and Storage Systems, Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany

   Jülich Aachen Research Alliance, JARA-Energy, Templergraben 55, 52056 Aachen, Germany

5. Markus Lienkamp

   Technical University of Munich

   Affiliation as printed

   Technical University of Munich (TUM), School of Engineering & Design, Department of Mobility Systems Engineering, Institute of Automotive Technology, Munich, Germany

6. Dirk Uwe Sauer Aachen Center for Aging Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives (ISEA)

   Forschungszentrum Jülich · Helmholtz-Institute Münster · Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   Center for Aging, Reliability and Lifetime Prediction of Electrochemical and Power Electronic Systems, RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany

   Chair for Electrochemical Energy Conversion and Storage Systems, Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany

   Helmholtz Institute Münster (HI MS), IEK 12, Forschungszentrum Jülich, 52425 Jülich, Germany

   Jülich Aachen Research Alliance, JARA-Energy, Templergraben 55, 52056 Aachen, Germany