Distortion-free inside-out imaging for rapid diagnostics of rechargeable Li-ion cells

Konstantin Romanenko, Alexej Jerschow

Research output: Contribution to journalArticle

Abstract

Safety risks associated with modern high energy-dense rechargeable cells highlight the need for advanced battery screening technologies. A common rechargeable cell exposed to a uniform magnetic field creates a characteristic field perturbation due to the inherent magnetism of electrochemical materials. The perturbation pattern depends on the design, state of charge, accumulated mechanical defects, and manufacturing flaws of the device. The quantification of the induced magnetic field with MRI provides a basis for noninvasive battery diagnostics. MRI distortions and rapid signal decay are the main challenges associated with strongly magnetic components present in most commercial cells. These can be avoided by using Single-Point Ramped Imaging with T1 enhancement (SPRITE). The method is immune to image artifacts arising from strong background gradients and eddy currents. Due to its superior image quality, SPRITE is highly sensitive to defects and the state of charge distribution in commercial Li-ion cells.

Original languageEnglish (US)
Pages (from-to)18783-18789
Number of pages7
JournalProceedings of the National Academy of Sciences of the United States of America
Volume116
Issue number38
DOIs
StatePublished - Sep 17 2019

Keywords

  • Battery diagnostics
  • Inside-out MRI
  • Li-ion batteries
  • SPRITE

ASJC Scopus subject areas

  • General

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