JP7395808B2 - 二次電池診断装置及び方法 - Google Patents
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/385—Arrangements for measuring battery or accumulator variables
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Description
容量=a×PL×PA
容量=0.9×3×20,000=54,000[mAh]=54Ah
Gp=|Gp2-Gp1|
200:電圧測定ユニット
300:プロセッサ
Rp:正極参照プロファイル
Rn:負極参照プロファイル
M1:第1充放電測定プロファイル
M2:第2充放電測定プロファイル
Rp':正極調整プロファイル
Rn':負極調整プロファイル
Claims (12)
- 参照電池の充電または放電に対する正極参照プロファイル及び負極参照プロファイルを保存するメモリユニットと、
充電または放電過程中に対象電池の電圧を測定する電圧測定ユニットと、
前記電圧測定ユニットによって相異なる複数の時点で測定された電圧に基づいて複数の充放電測定プロファイルを生成し、前記生成された複数の充放電測定プロファイルのそれぞれと前記メモリユニットに保存された正極参照プロファイル及び負極参照プロファイルから取得したシミュレーションプロファイルとを比較することで、前記複数の充放電測定プロファイルのそれぞれと前記シミュレーションプロファイルとの誤差が一定水準以内となる正極調整プロファイル及び負極調整プロファイルを前記複数の充放電測定プロファイルのそれぞれに対して決定するプロセッサと、を含む、二次電池診断装置。 - 前記プロセッサは、前記相異なる複数の時点に対して決定された正極調整プロファイル同士または負極調整プロファイル同士を比較する、請求項1に記載の二次電池診断装置。
- 前記プロセッサは、前記正極調整プロファイル同士の比較結果または前記負極調整プロファイル同士の比較結果に基づいて、前記対象電池の正極または負極に対する未使用領域の変化を把握する、請求項2に記載の二次電池診断装置。
- 前記プロセッサは、前記正極参照プロファイル及び前記負極参照プロファイルのうちの少なくとも一つを水平方向に移動させることで、前記正極調整プロファイル及び前記負極調整プロファイルを決定する、請求項1から3のいずれか一項に記載の二次電池診断装置。
- 前記プロセッサは、前記正極参照プロファイル及び前記負極参照プロファイルのうちの少なくとも一つを水平方向にスケール調整することで、前記正極調整プロファイル及び前記負極調整プロファイルを決定する、請求項1から4のいずれか一項に記載の二次電池診断装置。
- 前記電圧測定ユニットは、前記対象電池の満放電電圧及び満充電電圧を測定し、
前記プロセッサは、前記満放電電圧に基づいて前記正極調整プロファイルの正極開始値または前記負極調整プロファイルの負極開始値を推定し、前記満充電電圧に基づいて前記正極調整プロファイルの正極最終値及び前記負極調整プロファイルの負極最終値を推定する、請求項1から5のいずれか一項に記載の二次電池診断装置。 - 前記プロセッサは、前記正極最終値と前記正極開始値との差または前記負極最終値と前記負極開始値との差に基づいて、各時点における前記対象電池の容量を把握する、請求項6に記載の二次電池診断装置。
- 前記プロセッサは、前記相異なる複数の時点のそれぞれに対して前記シミュレーションプロファイルを上下方向に平行移動させることで前記複数の充放電測定プロファイルのそれぞれとの誤差を減少させ、前記相異なる複数の時点のそれぞれに対する平行移動の大きさを比較して前記相異なる複数の時点における前記対象電池の内部抵抗の増加程度を把握する、請求項1から7のいずれか一項に記載の二次電池診断装置。
- 請求項1から8のいずれか一項に記載の二次電池診断装置を含む、バッテリーパック。
- 請求項1から8のいずれか一項に記載の二次電池診断装置を含む、自動車。
- 参照電池の充電または放電に対する正極参照プロファイル及び負極参照プロファイルを保存する保存段階と、
対象電池を充電または放電させながら相異なる複数の時点でそれぞれ電圧を測定する電圧測定段階と、
前記電圧測定段階で測定された電圧に基づいて複数の充放電測定プロファイルを前記相異なる複数の時点のそれぞれに対して生成する生成段階と、
前記保存段階で保存された正極参照プロファイル及び負極参照プロファイルから取得したシミュレーションプロファイルと前記生成段階で生成された前記複数の充放電測定プロファイルのそれぞれとを比較する比較段階と、
前記シミュレーションプロファイルと前記複数の充放電測定プロファイルのそれぞれとの誤差が一定水準以内となる正極調整プロファイル及び負極調整プロファイルを前記複数の充放電測定プロファイルのそれぞれに対して決定する決定段階と、を含む、二次電池診断方法。 - 前記相異なる複数の時点に対して決定された正極調整プロファイル同士または負極調整プロファイル同士を比較する段階を備える、請求項11に記載の二次電池診断方法。
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WO2015045015A1 (ja) | 2013-09-25 | 2015-04-02 | 株式会社日立製作所 | 二次電池の状態判定方法、二次電池の状態判定装置、二次電池システム、および、状態判定装置を有する充放電制御装置 |
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EP4119963A1 (en) | 2023-01-18 |
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US20230160970A1 (en) | 2023-05-25 |
JP2023515831A (ja) | 2023-04-14 |
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