Experimental study on heat generation behavior of small lithium-ion secondary batteries

Kazuo Onda, Hisashi Kameyama, Takeshi Hanamoto, Kohei Ito

研究成果: ジャーナルへの寄稿学術誌査読

142 被引用数 (Scopus)

抄録

The overpotential resistance and the entropy change of two small lithium-ion secondary batteries, which are the heat source terms to increase the battery temperature, have been measured by several methods, changing the battery temperature and the state of charge. The temperature increase and the total heat generation rate of the batteries were calculated during the discharge cycle by using the measured resistance and entropy, being compared with the experimental results of the temperature increase and the total heat generation rate. The overpotential resistance was estimated by four measurement methods, i.e., the battery voltage-current characteristics during the constant current discharge, the difference between the open-circuit voltage and the cell voltage, the voltage change during the intermittent discharge for 60 s, and the ac impedance measurement. The overpotential resistance by the voltage-current characteristics is almost the same as by the difference between the open-circuit voltage and the cell voltage. However, in some cases the resistances by the intermittent discharge and the ac impedance are smaller than the former two resistances. The entropy change ΔS measured by the temperature change of the open-circuit voltage agrees almost with the ΔS measured by the heat production difference between the charge and discharge cycle. The temperature increases and the total heat generation rates estimated from the overpotential resistances by the voltage-current characteristics and ΔS by the temperature change of open-circuit voltage agree well with the measured ones for the two batteries during the constant current discharge.

本文言語英語
ページ(範囲)A285-A291
ジャーナルJournal of the Electrochemical Society
150
3
DOI
出版ステータス出版済み - 3月 2003
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 材料化学
  • 表面、皮膜および薄膜
  • 電気化学
  • 再生可能エネルギー、持続可能性、環境

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