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

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2015/10/01

タイトル(英語): Judging Degradation of Lithium Ion Batteries using a Real-time Capacitance Measurement

著者名: 金子　双男（新潟大学），川上　貴浩（新潟大学），新保　一成（新潟大学），馬場　暁（新潟大学），加藤　景三（新潟大学），宮嵜　重利（アルプス計器（株）），清水　浩一（アルプス計器（株）），佐藤　健一（ミドリ安全（株）），花岡　治（ミドリ電子（株））

著者名(英語): Futao Kaneko (Niigata University), Takahiro Kawakami (Niigata University), Kazunari Shinbo (Niigata University), Akira Baba (Niigata University), Keizo Kato (Niigata University), Shigetoshi Miyazaki (Alpus Electric Instruments), Koichi Shimizu (Alpus Electric Instruments), Kenichi Sato (Midori Anzen), Osamu Hanaoka (Midori Electronic)

キーワード: リチウムイオン電池，劣化評価，静電容量，SOH，電圧特性　　lithium ion battery，judging degradation，capacitance，state of health，voltage characteristics

要約(英語): 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.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.135 No.10 （2015） 特集：光エネルギー応用技術の最新動向

本誌掲載ページ: 624-629 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/135/10/135_624/_article/-char/ja/