Estimation of Battery Pack SOH based on Non-Destructive Diagnostic technique for Cell Capacity and Cell Balance during Battery Pack Degradation
非破壊診断技術を用いた組電池の内部状態（セル容量・セルバランス）の推定に基づくSOH評価
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- Publication code
- 20264177
- Paper/Info type
- JSAE Transaction
Vol.57 No.2
- Pages
- 258-263(Total 6 p)
- Date of publication
- Mar 2026
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 森田 朋和, 2) 本多 啓三, 3) 小鹿 健一郎 |
| Author(E) | 1) Tomokazu Morita, 2) Keizoh Honda, 3) Kenichiroh Koshika |
| Affiliation(J) | 1) (株)東芝, 2) 電気安全環境研究所, 3) 交通安全環境研究所 |
| Abstract(J) | 車載用バッテリを用いた7直列組電池についてサイクル劣化試験を実施し，一定サイクル毎に充電曲線解析を用いた非破壊診断を実施した．組電池レベルの劣化状態として，各セルブロックの容量と内部状態に加え，セルバランス状態を推定し，組電池全体のSOHを算出した．組電池SOHについて実測容量と比較し，推定精度を検証した． Translation |
| Abstract(E) | A cycle degradation test was conducted on a 7-cell series battery pack using automotive lithium-ion batteries. At regular cycle intervals, non-destructive diagnostics were performed using charge curve analysis. The degradation state of the pack was evaluated by estimating individual cell block capacities, capacities of positive and negative electrodes and shift of operation window (SOW), and cell balancing conditions. The overall State of Health (SOH) of the battery pack was then calculated. Finally, the estimated SOH was compared with the measured capacity to verify the accuracy of the diagnostic method. |
