JP2017510800A - 様々な使用範囲の充電状態(soc)を有する複数のセルを備えるバッテリの、充電状態の評価方法 - Google Patents
様々な使用範囲の充電状態(soc)を有する複数のセルを備えるバッテリの、充電状態の評価方法 Download PDFInfo
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Abstract
Description
− 所与の時点において、セルの端子間の電圧から、最小セル電圧と最大セル電圧を決定するステップ、
− 最小セル電圧を有するセルの最小充電状態と、最大セル電圧を有するセルの最大充電状態とを計算するステップであって、バッテリの充電状態は前記最小充電状態と前記最大充電状態の間にある、計算するステップ、
− セルの健全性を表す少なくとも1つの物理量に応じて、及び/または、バッテリの温度に応じて、各セルの前記最小許容充電状態値及び前記最大許容充電状態値を調整するステップ、を含む。
− 最小セル電圧を有するセルの最小充電状態が、前記セルの最小許容充電状態値よりも厳密に小さい場合に、バッテリの充電状態を最小充電状態値に合わせるステップ、及び/または、
− 最大セル電圧を有するセルの最大充電状態が、前記セルの最大許容充電状態値よりも厳密に大きい場合に、バッテリの充電状態を最大充電状態値に合わせるステップ、
を含む、少なくとも1つのステップを含む。
− 最小許容充電状態値と最大許容充電状態値との間で規定される使用範囲は、セルの健全性及びセルの経年の進行に応じて広くなり、及び/または、
− 前記使用範囲は、バッテリの温度が比較的低く、既定の温度閾値未満である場合に、限定される。
− バッテリの電流測定値を提供可能な電流センサと、
− バッテリの温度測定値を提供可能な1または複数の温度センサと、
− セルの端子間の電圧から最小セル電圧と最大セル電圧を収集可能な電子制御ユニットであって、最小セル電圧、電流測定値、及びバッテリの温度測定値によってセルの最小充電状態を評価可能な第2の評価モジュール、最大セル電圧、電流測定値、及びバッテリの温度測定値によってセルの最大充電状態を評価可能な第3の評価モジュール、並びに、最小充電状態と最大充電状態に応じて、及び、第4のモジュールによって決定される最小許容充電状態値と最大許容充電状態値に応じて、充電状態を決定可能な第5の評価モジュールであって、第4のモジュールは、セルの健全性を表す少なくとも1つの物理量に応じて、及び/または、バッテリの温度に応じて、各セルの前記最小許容充電状態値と前記最大許容充電状態値を調整可能な第5の評価モジュール、を備える電子制御ユニットと、を備える。
・ SOCmin≧BSOCmin且つSOCmax≦BSOCmaxの場合、以下の式が当てはまる。
ここでは、SOCmin、SOCmax、BSOCmin、及びBSOCmaxは、それぞれ、最小充電状態、最大充電状態、最小許容充電状態値BSOCmin、及び最大許容充電状態値BSOCmaxの、不連続の時点kにおける標本値である。
・ SOCmin<BSOCmin且つSOCmax≦BSOCmaxの場合、以下の関係が当てはまる。
・ SOCmin≧BSOCmin且つSOCmax>BSOCmaxの場合、以下の関係が当てはまる。
・ SOCmin<BSOCmin且つSOCmax>BSOCmaxの場合、バッテリの充電状態SOCpackは、利用不能と考えられる。当該バッテリは、非平衡であると言われる。なぜならば、最高の程度まで充電されたセルが最大許容充電状態値BSOCmaxを超過している一方、最低の程度まで充電されたセルは最小許容充電状態値BSOCminを下回っているからである。このタイプのバッテリは実際には使用不能で、少なくとも再平衡化を必要とする。
Claims (10)
- 直列に接続された複数の電気化学セル(C1、...CN)を備えるバッテリであって、各セル(C1、...CN)が最小許容充電状態値(BSOCmin)と最大許容充電状態値(BSOCmax)との間に保持された充電状態(SOC)を有するバッテリの充電状態(SOCpack)の評価方法であって、前記方法は、
− 所与の時点において、前記セルの端子間の電圧から、最小セル電圧(UCmin)と最大セル電圧(UCmax)を決定するステップ、
− 前記最小セル電圧(UCmin)を有する前記セルの最小充電状態(SOCmin)と、最大セル電圧(UCmax)を有する前記セルの最大充電状態(SOCmax)とを計算するステップであって、前記バッテリの前記充電状態(SOCpack)は前記最小充電状態(SOCmin)と前記最大充電状態(SOCmax)の間にある、計算するステップ、を含み、
前記方法は、前記セルの健全性を表す少なくとも1つの物理量に応じて、及び/または、前記バッテリの温度に応じて、各セルの前記最小許容充電状態値(BSOCmin)及び前記最大許容充電状態値(BSOCmax)を調整するステップを含むことを特徴とする、バッテリの充電状態(SOCpack)の評価方法。 - − 前記最小セル電圧(UCmin)を有する前記セルの前記最小充電状態(SOCmin)が、前記セルの前記最小許容充電状態値(BSOCmin)よりも厳密に小さい場合に、前記バッテリの前記充電状態(SOCpack)を前記最小充電状態(SOCmin)に合わせるステップ、及び/または、
− 前記最大セル電圧(UCmax)を有する前記セルの前記最大充電状態(SOCmax)が、前記セルの前記最大許容充電状態値(BSOCmax)よりも厳密に大きい場合に、前記バッテリの前記充電状態(SOCpack)を前記最大充電状態(SOCmax)に合わせるステップ、
を含む、少なくとも1つのステップを含むことを特徴とする、請求項1に記載の評価方法。 - 前記最大セル電圧(UCmax)を有する前記セルの前記最大充電状態(SOCmax)が前記セルの前記最大許容充電状態値(BSOCmax)よりも厳密に大きい場合、及び、前記最小セル電圧(UCmin)を有する前記セルの最小充電状態(SOCmin)が前記セルの前記最小許容充電状態値(BSOCmin)よりも厳密に小さい場合、前記方法は、前記バッテリの前記充電状態(SOCpack)に「利用不能」という値を帰属させることを含むステップを含むことを特徴とする、請求項1から3のいずれか一項に記載の評価方法。
- 前記セルの健全性を表す前記少なくとも1つの物理量は、前記セルの前記端子間で測定された電圧、及び/または前記セルを流れる電流(IBAT)、及び/または前記セルに関する温度であることを特徴とする、請求項1から4のいずれか一項に記載の評価方法。
- 前記最小及び最大許容充電状態値(BSOCmin、BSOCmax)と、前記セルの前記健全性を表す前記少なくとも1つの物理量との間の対応は、既定であり、好ましくは数値表中で既定であることを特徴とする、請求項1から5のいずれか一項に記載の評価方法。
- − 前記最小許容充電状態値(BSOCmin)と前記最大許容充電状態値(BSOCmax)との間で規定される使用範囲は、前記セルの前記健全性及び前記セルの経年の進行に応じて広くなり、及び/または、
− 前記使用範囲は、前記バッテリの前記温度が比較的低く、既定の温度閾値未満である場合に、限定される
ことを特徴とする、請求項1から6のいずれか一項に記載の評価方法。 - 直列に接続された複数の電気化学セル(C1、...CN)を備えるバッテリであって、前記複数の電気化学セル(C1、...CN)の各々が、最小許容充電状態値(BSOCmin)と最大許容充電状態値(BSOCmax)との間で保持された充電状態(SOC)を有するバッテリの、充電状態の評価システムであって、前記システムが、
− 前記バッテリの電流測定値(IBAT)を提供可能な電流センサと、
− 前記バッテリの温度測定値(TBAT)を提供可能な1または複数の温度センサと、
− 前記セルの端子間の電圧から最小セル電圧(UCmin)と最大セル電圧(UCmax)を収集可能な電子制御ユニット(ECU)であって、前記最小セル電圧(UCmin)、前記電流測定値(IBAT)、及び前記バッテリの前記温度測定値(TBAT)によって前記セルの最小充電状態(SOCmin)を評価可能な第2の評価モジュール(20)、前記最大セル電圧(UCmax)、前記電流測定値(IBAT)、及び前記バッテリの前記温度測定値(TBAT)によって前記セルの最大充電状態(SOCmax)を評価可能な第3の評価モジュール(30)、並びに、前記最小充電状態(SOCmin)と前記最大充電状態(SOCmax)に応じて、及び、第4のモジュール(40)によって決定される前記最小許容充電状態値(BSOCmin)と前記最大許容充電状態値(BSCOmax)に応じて、前記充電状態(SOCpack)を決定可能な第5の評価モジュール(50)であって、前記第4のモジュール(40)は、前記セルの健全性を表す少なくとも1つの物理量に応じて、及び/または、前記バッテリの前記温度に応じて、各セルの前記最小許容充電状態値(BSCOmax)と前記最大許容充電状態値(BSOCmin)を調整可能な、第5の評価モジュールを備える電子制御ユニット(ECU)と、を備える、システム。 - 前記最小セル電圧(UCmin)と前記最大セル電圧(UCmax)のみを前記電子制御ユニット(ECU)に直接送達することが可能な、第1のモジュール(10)を含むことを特徴とする、請求項8に記載の評価システム。
- 請求項8または9に記載の評価システムを備えることを特徴とする、車両。
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PCT/FR2015/050566 WO2015132544A1 (fr) | 2014-03-07 | 2015-03-09 | Méthode d'estimation d'un état de charge d'une batterie comportant plusieurs cellules présentant une plage d'utilisation d'état de charge variable |
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