Diagnosis of high-Ni NCA/Gr-Si cells before rapid capacity drop by monitoring the heterogeneous degradation

Kim, Taeyoung; Park, Soobin; Bae, JunWoo; Jung, DaWoon; Cheon, Hansu; Lee, Wang-geun; Choi, Yunseok

doi:10.1039/d3mh01761c

Mater. Horiz.

2024

DOI: 10.1039/d3mh01761c

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Diagnosis of high-Ni NCA/Gr-Si cells before rapid capacity drop by monitoring the heterogeneous degradation

Taeyoung Kim,

Soobin Park,

JunWoo Bae

et al.

Abstract: Understanding the degradation of lithium-ion batteries is of utmost significance for preventing unexpected capacity drops and addressing safety concerns.

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Incoming Inspection of Lithium‐Ion Batteries Based on Multi‐cell Testing

Ank,

Rößle,

Kröger

et al. 2024

Energy Tech

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Incoming inspections of battery cells prior to module assembly help to ensure the quality of the battery system and prevent the installation of anomalous cells. Depending on the area of application, identifying deviations in the electrical behavior of the battery cells under test can be essential for downstream assembly processes like cell matching and algorithm adaptations of the battery management software. In this work, the use of a multi‐cell testing procedure involving differential voltage analysis, incremental capacity analysis, direct current internal resistance tests, and electrochemical impedance spectroscopy is investigated to reveal differences in cell properties and identify anomalous cells while economizing on the required cell test channels. The results obtained from 20 model‐identical 21700 cylindrical cells from four different batches demonstrate that this methodology can detect material variations, such as differing silicon and graphite content, which are not disclosed by the supplier or indicated in the data sheet. A teardown with elemental analysis of two cells from different batches is carried out as verification. Finally, prospects for potential application scenarios and raw measurement data are provided.

show abstract

Incoming Inspection of Lithium‐Ion Batteries Based on Multi‐cell Testing

Ank,

Rößle,

Kröger

et al. 2024

Energy Tech

View full text Add to dashboard Cite

show abstract

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Diagnosis of high-Ni NCA/Gr-Si cells before rapid capacity drop by monitoring the heterogeneous degradation

Abstract: Understanding the degradation of lithium-ion batteries is of utmost significance for preventing unexpected capacity drops and addressing safety concerns.

Cited by 1 publication

References 29 publications

Incoming Inspection of Lithium‐Ion Batteries Based on Multi‐cell Testing

Incoming Inspection of Lithium‐Ion Batteries Based on Multi‐cell Testing

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