Investigating Anode Potential Errors of Real-Time Capable DFN Type Models Induced by Inhomogeneity for Fast Charging of Cylindrical Lithium-Ion Batteries

Alexander Frank, Axel Durdel, Maximilian Scheller, Johannes Sturm, Andreas Jossen

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The occurrence of lithium plating during fast charging poses a safety risk and can reduce the battery lifespan. To prevent plating during the application of model-based charging protocols, a safety margin is added to the lithium plating voltage criterion to compensate for unaccounted in-plane heterogeneities. This article investigates the value of this safety buffer when using real-time capable 1D-DFNs coupled with a 0D thermal model. Through comparison with a multi-scale model, the 1D-DFN error to the local minimum in the anode potential can be characterized. An adjusted cooling coefficient enables 0D temperature modeling with an average error of less than 1 C, despite the inability to consider temperature gradients. For a high-energy NMC811/SiC parameterization of a 4680 format cell with tabless current collectors, the 1D-DFN error in the anode potential deviates by a maximum of 10 mV during charging up to 3C at 50 W m−2 K−1 convective mantle cooling. The anode potential error is influenced by the charging rate, cooling strategy, cell format, and current collector design.

Original languageEnglish
Article number070520
JournalJournal of the Electrochemical Society
Volume171
Issue number7
DOIs
StatePublished - 1 Jul 2024

Keywords

  • 4680
  • anode potential error
  • batteries—Li-ion
  • fast charging
  • inhomogeneity
  • lithium plating
  • tabless

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