JP2021097569A - 車両、車両制御システム、車両制御方法 - Google Patents
車両、車両制御システム、車両制御方法 Download PDFInfo
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Abstract
Description
Win=IWin×V1 …(F2)
変換式F1は、VBsとIWinとを乗算することによりIWinをWinに変換する。変換式F1中のVBsは、電池センサ12によって検出されたバッテリ11の電圧の実測値を示す。この実施の形態では、平均セル電圧(たとえば、各セル111の電圧の平均値)を、VBsとして採用する。ただしこれに限られず、平均セル電圧に代えて、最大セル電圧(すなわち、各セル111の電圧のうち最も高い電圧値)、最小セル電圧(すなわち、各セル111の電圧のうち最も低い電圧値)、又は組電池の端子間電圧(すなわち、SMR14が閉状態であるときに外部接続端子T1,T2間に印加される電圧)を、VBsとして採用してもよい。
Wout=IWout×V2 …(F4)
変換式F3中のVBsは、変換式F1におけるVBsと同じである。変換式F4中のV2は、IWoutに相当する電流が流れている状態のバッテリ11の電圧値である。V2は、第2推定部622によって推定される。V2の推定方法については後述する。この実施の形態に係るV2は、本開示に係る「第2電圧推定値」の一例に相当する。
上記関係式において、「R」は内部抵抗、「IB」は実電流、「VBs」は実電圧を示す。上記の関係式中のVBsは、変換式F1中のVBsと同じである。上記の関係式は、予め記憶装置60c(図2)に記憶されている。なお、上記の関係式は、所定の補正項(たとえば、分極に関する補正項)を含んでもよい。
上記関係式において、「R」は内部抵抗、「IB」は実電流、「VBs」は実電圧を示す。上記の関係式中のVBsは、変換式F1中のVBsと同じである。上記の関係式は、予め記憶装置60c(図2)に記憶されている。なお、上記の関係式は、所定の補正項(たとえば、分極に関する補正項)を含んでもよい。
今回開示された実施の形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施の形態の説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。
Claims (9)
- 二次電池と、前記二次電池の状態を検出する電池センサと、第1制御装置とを含む電池パックと、
前記電池パックとは別個に設けられた第2制御装置とを備える、車両であって、
前記第1制御装置は、前記電池センサの検出値を用いて、前記二次電池の入力電流の上限値を示す第1電流上限値と前記二次電池の出力電流の上限値を示す第2電流上限値との少なくとも一方を求めるように構成され、
前記第2制御装置は、前記二次電池の入力電力の上限値を示す第1電力上限値と前記二次電池の出力電力の上限値を示す第2電力上限値との少なくとも一方を用いて、前記二次電池の入力電力と前記二次電池の出力電力との少なくとも一方を制御するように構成され、
状況に応じて選択肢の中から変換式を選択し、前記選択された変換式を用いて、前記第1電流上限値及び前記第2電流上限値の少なくとも一方を前記第1電力上限値及び前記第2電力上限値の少なくとも一方に変換する変換器が搭載されている、車両。 - 前記第1制御装置は、前記電池センサの検出値を用いて、前記第1電流上限値を求めるように構成され、
前記第2制御装置は、前記二次電池の入力電力が前記第1電力上限値を超えないように前記二次電池の入力電力を制御するように構成され、
前記選択肢は、
前記電池センサによって検出された前記二次電池の電圧の実測値と前記第1電流上限値とを乗算することにより前記第1電流上限値を前記第1電力上限値に変換する第1変換式と、
前記第1電流上限値に相当する電流が流れている状態の前記二次電池の電圧値である第1電圧推定値と、前記第1電流上限値とを乗算することにより、前記第1電流上限値を前記第1電力上限値に変換する第2変換式とを含み、
前記変換器は、前記二次電池の状態が所定の第1状態に含まれる場合に前記第2変換式を選択し、前記二次電池の状態が前記第1状態に含まれない場合に前記第1変換式を選択する、請求項1に記載の車両。 - 前記第1制御装置は、前記電池センサの検出値を用いて、前記第2電流上限値を求めるように構成され、
前記第2制御装置は、前記二次電池の出力電力が前記第2電力上限値を超えないように前記二次電池の出力電力を制御するように構成され、
前記選択肢は、
前記電池センサによって検出された前記二次電池の電圧の実測値と前記第2電流上限値とを乗算することにより前記第2電流上限値を前記第2電力上限値に変換する第3変換式と、
前記第2電流上限値に相当する電流が流れている状態の前記二次電池の電圧値である第2電圧推定値と、前記第2電流上限値とを乗算することにより、前記第2電流上限値を前記第2電力上限値に変換する第4変換式とを含み、
前記変換器は、前記二次電池の状態が所定の第2状態に含まれる場合に前記第4変換式を選択し、前記二次電池の状態が前記第2状態に含まれない場合に前記第3変換式を選択する、請求項1又は2に記載の車両。 - 前記電池パックとは別個に設けられ、前記第1制御装置と前記第2制御装置との間の通信を中継する第3制御装置をさらに備え、
前記変換器は、前記第3制御装置に搭載されており、
前記電池パックは、前記第1電流上限値及び前記第2電流上限値の少なくとも一方を出力するように構成され、
前記電池パックから前記第3制御装置に前記第1電流上限値及び前記第2電流上限値の少なくとも一方が入力されると、前記変換器によって前記第1電流上限値及び前記第2電流上限値の少なくとも一方が前記第1電力上限値及び前記第2電力上限値の少なくとも一方に変換され、前記第3制御装置から前記第2制御装置へ前記第1電力上限値及び前記第2電力上限値の少なくとも一方が出力される、請求項1〜3のいずれか1項に記載の車両。 - 前記第3制御装置は、前記第1電流上限値及び前記第2電流上限値の少なくとも一方が入力された場合には前記変換を行なって前記第1電力上限値及び前記第2電力上限値の少なくとも一方を出力し、前記第1電力上限値及び前記第2電力上限値の少なくとも一方が入力された場合には前記変換を行なうことなく前記第1電力上限値及び前記第2電力上限値の少なくとも一方を出力するように構成される、請求項4に記載の車両。
- 前記変換器は、前記第1制御装置に搭載されており、
前記第1制御装置は、前記第2制御装置と接続されている場合に、前記電池センサの検出値を用いて求めた前記第1電流上限値及び前記第2電流上限値の少なくとも一方を前記変換器によって前記第1電力上限値及び前記第2電力上限値の少なくとも一方に変換し、得られた前記第1電力上限値及び前記第2電力上限値の少なくとも一方を前記第2制御装置へ出力するように構成される、請求項1〜3のいずれか1項に記載の車両。 - 前記変換器は、前記第2制御装置に搭載されており、
前記電池パックは、前記第1電流上限値及び前記第2電流上限値の少なくとも一方を出力するように構成され、
前記第2制御装置は、前記電池パックから入力される前記第1電流上限値及び前記第2電流上限値の少なくとも一方を前記変換器によって前記第1電力上限値及び前記第2電力上限値の少なくとも一方に変換し、得られた前記第1電力上限値及び前記第2電力上限値の少なくとも一方を用いて前記二次電池の入力電力と前記二次電池の出力電力との少なくとも一方を制御するように構成される、請求項1〜3のいずれか1項に記載の車両。 - 二次電池と、前記二次電池の状態を検出する電池センサと、前記二次電池の入力電流の上限値を示す第1電流上限値と前記二次電池の出力電流の上限値を示す第2電流上限値との少なくとも一方を前記電池センサの検出値を用いて求める制御装置とを含む電池パックを取り付け可能に構成される車両制御システムであって、
当該車両制御システムに前記電池パックが取り付けられた場合に、前記二次電池の入力電力の上限値を示す第1電力上限値と前記二次電池の出力電力の上限値を示す第2電力上限値との少なくとも一方を用いて、前記二次電池の入力電力と前記二次電池の出力電力との少なくとも一方を制御する制御部と、
状況に応じて選択肢の中から変換式を選択し、前記電池パックから入力される前記第1電流上限値及び前記第2電流上限値の少なくとも一方を、前記選択された変換式を用いて前記第1電力上限値及び前記第2電力上限値の少なくとも一方に変換し、得られた前記第1電力上限値及び前記第2電力上限値の少なくとも一方を前記制御部へ出力する変換部とを備える、車両制御システム。 - 二次電池と、前記二次電池の状態を検出する電池センサと、前記二次電池の入力電流の上限値を示す第1電流上限値と前記二次電池の出力電流の上限値を示す第2電流上限値との少なくとも一方を前記電池センサの検出値を用いて求める制御装置とを含む電池パックが取り付けられた車両制御システムが、前記電池パックから前記第1電流上限値及び前記第2電流上限値の少なくとも一方を取得するステップと、
前記車両制御システムが、選択肢の中から変換式を選択するステップと、
前記車両制御システムが、前記電池パックから取得した前記第1電流上限値及び前記第2電流上限値の少なくとも一方を、前記選択された変換式を用いて前記第1電力上限値及び前記第2電力上限値の少なくとも一方に変換するステップと、
前記車両制御システムが、前記第1電力上限値及び前記第2電力上限値の少なくとも一方を用いて、前記二次電池の入力電力と前記二次電池の出力電力との少なくとも一方を制御するステップとを含む、車両制御方法。
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