JP2018186101A - 電池制御装置、電池パック - Google Patents
電池制御装置、電池パック Download PDFInfo
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Abstract
Description
本発明による電池パックは、電池と、前記電池に流すことができる最大電流値を算出する演算部と記憶部を有する電池制御装置を有する電池パックにおいて、前記演算部は、電池の電流値、電圧値、温度のそれぞれの情報を用いて前記電池の現在の分極電圧を演算する電池等価回路モデル部を有し、前記記憶部は分極電圧の時間変化を表すパラメータを格納している。
Icmax1=(Vmax-OCV)/R1 …(1)
Idmax=(OCV-Vmin)/R1 …(2)
Vpt=IRp-(IRp-Vp0)exp(-t/RpCp) …(3)
Vpt=IRp(1-Gt)+Vp0・Gt …(4)
CCV=OCV+I・Rdc+Vpt
=OCV+I・Rdc+IRp(1-Gt)+Vp0・Gt
=OCV+I(Rdc+Rp(1-Gt))+Vp0・Gt …(5)
Icmax2=(Vmax-OCV)/(Rdc+Rp(1-Gt))-Vp0・Gt/(Rdc+Rp(1-Gt))
=(Vmax-OCV)/R1-Vp0・Gt/R1 …(6)
R1=Rdc+Gsoc+Rp(1-Gt) …(7)
(a)電池制御装置であるバッテリコントローラ101は、電池の開回路電圧(OCV)および電池に設定された上下限電圧(Vmax,Vmin)に基づいて、無分極状態を仮定した場合の電池の電流制限値である第1許容電流値を算出する第1許容電流値演算部704と、前記電流制限値の算出時における電池の分極状態を推定する電池等価回路モデル702と、推定された分極状態に基づいて第1許容電流値を補正する補正部としての分極予測部705、補正量演算部706および第2許容電流値演算部707、を備える。そして、補正された第1許容電流値、すなわち第2許容電流値Imax2を、電池の許容充放電電流値として出力する。
した場合の電池内部抵抗である第1抵抗R1に基づいて、電池の第1許容電流値を算出し、分極予測部705は、電池等価回路モデル702で推定された分極状態の電池を電流ゼロの状態に前記所定時間維持したときの第1分極電圧Vp0・Gtを算出し、算出された第1分極電圧Vp0・Gtに対応する許容電流値補正値ΔIを用いて第1許容電流値を補正するようにしても良い。
Claims (8)
- 電池に流すことができる最大電流値を算出する演算部と記憶部を有する電池制御装置において、
前記演算部は、電池の電流値、電圧値、温度のそれぞれの情報を用いて前記電池の現在の分極電圧を演算する電池等価回路モデル部を有し、
前記記憶部は分極電圧の時間変化を表すパラメータを格納していることを特徴とする電池制御装置。 - 請求項1に記載の電池制御装置において、
前記記憶部は無分極状態から一定電流を所定時間流した後に予想される電池の内部抵抗を格納していることを特徴とする電池制御装置。 - 請求項2に記載の電池制御装置において、
前記演算部はさらに分極予測部を有し、
前記分極予測部は前記現在の分極電圧と前記分極電圧の時間変化を表すパラメータに基づいて所定時間経過後の分極電圧を演算することを特徴とする電池制御装置。 - 請求項3に記載の電池制御装置において、
前記演算部は許容電流値補正部を有し、
前記許容電流値補正部は前記所定時間経過後の分極電圧と無分極状態から一定電流を所定時間流した後に予想される電池の内部抵抗に基づいて許容電流値補正値を算出することを特徴とする電池制御装置。 - 電池と、前記電池に流すことができる最大電流値を算出する演算部と記憶部を有する電池制御装置を有する電池パックにおいて、
前記演算部は、電池の電流値、電圧値、温度のそれぞれの情報を用いて前記電池の現在の分極電圧を演算する電池等価回路モデル部を有し、
前記記憶部は分極電圧の時間変化を表すパラメータを格納していることを特徴とする電池パック。 - 請求項5に記載の電池パックにおいて、
前記記憶部は無分極状態から一定電流を所定時間流した後に予想される電池の内部抵抗を格納していることを特徴とする電池パック。 - 請求項6に記載の電池パックにおいて、
前記演算部はさらに分極予測部を有し、
前記分極予測部は前記現在の分極電圧と前記分極電圧の時間変化を表すパラメータに基づいて所定時間経過後の分極電圧を演算することを特徴とする電池パック。 - 請求項7に記載の電池パックにおいて、
前記演算部は許容電流値補正部を有し、
前記許容電流値補正部は前記所定時間経過後の分極電圧と無分極状態から一定電流を所定時間流した後に予想される電池の内部抵抗に基づいて許容電流値補正値を算出することを特徴とする電池パック。
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JP2018147804A JP6564116B2 (ja) | 2015-07-02 | 2018-08-06 | 電池制御装置、電池パック |
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JP2015133913A JP6383704B2 (ja) | 2015-07-02 | 2015-07-02 | 電池制御装置 |
JP2018147804A JP6564116B2 (ja) | 2015-07-02 | 2018-08-06 | 電池制御装置、電池パック |
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