JP2017043156A - 電池システム - Google Patents
電池システム Download PDFInfo
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- JP2017043156A JP2017043156A JP2015165726A JP2015165726A JP2017043156A JP 2017043156 A JP2017043156 A JP 2017043156A JP 2015165726 A JP2015165726 A JP 2015165726A JP 2015165726 A JP2015165726 A JP 2015165726A JP 2017043156 A JP2017043156 A JP 2017043156A
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
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Abstract
【解決手段】ECUは、モータジェネレータとの間で電力を授受する蓄電装置のSOCを車両SOCとして算出し、車両SOCが切替値に低下するまではCD(電力消費)モードを選択し、車両SOCが切替値に低下した場合にCDモードからCS(電力維持)モードへ切り替える。蓄電装置は、直列に接続された複数の電池ユニットを含む組電池である。ECUは、複数の電池ユニットのSOCのうちの最大値と最小値との平均値が切替値よりも大きい場合は平均値よりも大きいSOC(A)を車両SOCとし、平均値が切替値よりも小さい場合は平均値よりも小さいSOC(B)を車両SOCとする。切替値は、車両SOCの上限値と下限値との中心値よりも低い値に設定される。
【選択図】図4
Description
図1は、本実施の形態に従う電池システムを搭載する車両1の全体ブロック図である。車両1は、エンジン10と、第1MG(Motor Generator)20と、第2MG30と、動力分割装置40と、減速機50と、PCU(Power Control Unit)60と、蓄電装置70と、駆動輪80と、ECU(Electronic Control Unit)100と、を備える。
以下、車両SOCの算出方法について詳しく説明する。以下では、説明を分り易くするために、車両SOCの上限値Aを100%、下限値Bを0%、中心値Cを50%とする場合を例示的に説明する場合がある。
車両SOC=100×Smin/{100−(Smax−Smin)}
しかしながら、上記の算出式で車両SOCを算出すると、最大値Smaxと最小値Sminとの間に差がある場合(すなわちSmax−Smin>0の場合)には、車両SOCが50%(中心値C)よりも低い領域において、車両SOCが最大値Smaxよりも最小値Sminに近い値となる。すなわち、最小値Sminが車両SOCに与える影響のほうが、最大値Smaxが車両SOCに与える影響よりも大きくなる。
<変形例>
上述の本実施の形態においては、車両SOCの算出式が式(1)から式(2)に切り替えられる車両SOCが、制御モードがCDモードからCSモードに切り替えられる「切替値D」と同じ値に設定されていた。
Claims (3)
- エンジンを停止しモータジェネレータの動力を用いて走行する電動走行と、前記エンジンおよび前記モータジェネレータの双方の動力を用いて走行するハイブリッド走行との切り替えが可能な車両に搭載される電池システムであって、
直列に接続された複数の電池ユニットを含み、前記モータジェネレータとの間で電力を授受するように構成された蓄電装置と、
前記蓄電装置の満容量に対する残量の割合を表わす車両SOCを算出するように構成された制御装置とを備え、
前記車両は、前記車両SOCが予め定められた値よりも高い場合にCDモードで走行し、前記車両SOCが前記予め定められた値未満に低下した場合に前記CDモードからCSモードに切り替えて走行するように構成され、
前記制御装置は、前記複数の電池ユニットにそれぞれ対応する複数のユニットSOCのうちの最大ユニットSOCと最小ユニットSOCとの平均である平均SOCがしきい値よりも高い場合は前記車両SOCを前記平均SOCよりも高い値に算出し、前記平均SOCが前記しきい値よりも低い場合は前記車両SOCを前記平均SOCよりも低い値に算出し、
前記しきい値は、前記車両SOCの上限値と下限値との中心値よりも低い値に設定される、電池システム。 - 前記制御装置は、前記最大ユニットSOCと前記最小ユニットSOCとの差が大きい場合は小さい場合に比べて前記しきい値をより大きい値にする、請求項1に記載の電池システム。
- 前記制御装置は、
前記平均SOCが前記しきい値よりも高い場合、前記最大ユニットSOCが上限値である時に前記車両SOCが上限値となり前記平均SOCが前記しきい値であるときに前記車両SOCが前記しきい値となる第1算出式を用いて前記車両SOCを算出し、
前記平均SOCが前記しきい値よりも低い場合、前記平均SOCが前記しきい値である時に前記車両SOCが前記しきい値となり前記最小ユニットSOCが下限値である時に前記車両SOCが下限値となる第2算出式を用いて前記車両SOCを算出する、請求項1または2に記載の電池システム。
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