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IEICE TRANSACTIONS on Electronics

Contaminant Detection System using High Tc SQUID for Inspection of Lithium Ion Battery Cathode Sheet

Saburo TANAKA, Takeyoshi OHTANI, Yosuke UCHIDA, Yoshimi HATSUKADE, Shuichi SUZUKI

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Summary :

We report the fabrication of magnetic metallic contaminant detectors using multiple high-Tc SQUIDs (superconducting quantum interference devices) for a lithium-ion battery cathode sheet. Finding ultra-small metallic foreign matter is an important issue for a manufacturer because metallic contaminants carry the risk of an internal short. When contamination occurs, the manufacturer of the product suffers a great loss from recalling the tainted product. Hence, a detection method of small contaminants is required. Preventing such accidents is also an important issue for manufacturers of industrial products. Given the lower detection limit for practical X-ray usage is in the order of 1 mm, a detection system using a SQUID is a more powerful tool for sensitive inspections. We design and set up an eight-channel roll-to-roll high-Tc dc-SQUID inspection system for a lithium ion battery cathode sheet. We report the evaluation results that the detection of a small φ18 -μm steel particle on a lithium-ion battery cathode sheet was successfully done.

Publication
IEICE TRANSACTIONS on Electronics Vol.E98-C No.3 pp.174-177
Publication Date
2015/03/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E98.C.174
Type of Manuscript
Special Section PAPER (Special Section on Leading-Edge Applications and Fundamentals of Superconducting Sensors and Detectors)
Category

Authors

Saburo TANAKA
  Toyohashi University of Technology
Takeyoshi OHTANI
  Toyohashi University of Technology
Yosuke UCHIDA
  Toyohashi University of Technology
Yoshimi HATSUKADE
  Kinki University
Shuichi SUZUKI
  Advance Food Technology Co., Ltd.

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