Quick testing of batteries in lithium-ion battery packs with impedance-measuring technology

Kazuhiko Takeno, Masahiro Ichimura, Kazuo Takano, Junichi Yamaki, Shigeto Okada

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)


We discuss a rapid testing of capacity in Li-ion battery packs with impedance-measuring technology to evaluate their capability in mobile phones. Our measurements of the capacity and impedance at 1kHz for various kinds of battery packs conclusively proved that there is a strong correlation between capacity and impedance. It can be applied even when the pack consists of not only a Li-ion battery but also a Positive Temperature Coefficient (PTC) device and a protection circuit in-series, and this correlation is largely unaffected by the degree of charge. The results we obtained from measuring impedance revealed the possibility of quickly assessing degradation in Li-ion battery packs.

Original languageEnglish
Pages (from-to)67-75
Number of pages9
JournalJournal of Power Sources
Issue number1
Publication statusPublished - Mar 29 2004

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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