Judging Degradation of Lithium Ion Batteries using a Real-time Capacitance Measurement
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- Kaneko Futao
- Niigata University
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- Kawakami Takahiro
- Niigata University
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- Shinbo Kazunari
- Niigata University
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- Baba Akira
- Niigata University
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- Kato Keizo
- Niigata University
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- Miyazaki Shigetoshi
- Alpus Electric Instruments
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- Shimizu Koichi
- Alpus Electric Instruments
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- Sato Kenichi
- Midori Anzen
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- Hanaoka Osamu
- Midori Electronic
Bibliographic Information
- Other Title
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- 静電容量の実時間測定によるリチウムイオン電池の劣化評価
- セイデンヨウリョウ ノ ジツジカン ソクテイ ニ ヨル リチウムイオン デンチ ノ レッカ ヒョウカ
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Abstract
A novel method was proposed to judge degradation/health of lithium-ion batteries using the capacitance that was estimated from the real-time voltage and current characteristics of the batteries. It is thought that the capacitance of lithium ion batteries decreases with degradation because of undesirable components formed on the electrodes that are the main cause of the degradation. As the lithium ion batteries are active, the capacitance was evaluated from the differential equation, ΔQ/Δv = I/(Δv/Δt) = i/(dv/dt), using the voltage and the current characteristics during the charging or the discharging. The capacitances of the commercial LIBs with different SOHs; 100, 92 and 88% were estimated during the charging and the discharging using the equation. The average capacitance in the specific voltage region of the batteries was directly proportional to the state of health. Therefore, the proposed measurement is thought to be a useful method for judging degradation of lithium-ion batteries.
Journal
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- IEEJ Transactions on Fundamentals and Materials
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IEEJ Transactions on Fundamentals and Materials 135 (10), 624-629, 2015
The Institute of Electrical Engineers of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001204599439616
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- NII Article ID
- 130005101522
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- NII Book ID
- AN10136312
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- ISSN
- 13475533
- 03854205
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- NDL BIB ID
- 026796905
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed