JPWO2014184954A1 - 車載太陽電池を利用する充電制御装置 - Google Patents
車載太陽電池を利用する充電制御装置 Download PDFInfo
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Abstract
Description
車載太陽電池21による発電量Pが、ソーラECU31の消費電力L1よりも大きく、かつ、車両100に搭載されてイグニッション(I/G)がオン状態であるときに作動する複数の補機及び複数の電子制御機器による全消費電力Lall(所定の電力)以下である場合には、ソーラ充電器23が太陽光発電による電力をソーラECU31に供給し、ソーラECU31は、図3に示すように、太陽光発電による電力を用いて起動する。そして、ソーラECU31は、発電量Pから自身の作動に伴う消費電力L1を減じた余剰電力(P−L1)を以下の優先順位に従って順に供給して充電を制御する。
a.)余剰電力(P−L1)を所定のSOCs以下となっているサブバッテリ19に供給
b.)サブバッテリ19のSOCが所定のSOCsを超えたとき余剰電力(P−L1)をテンポラリバッテリ22に供給
c.)テンポラリバッテリ22のSOCが所定のSOCtを超えたときメインバッテリ18に供給、の順に従って供給して充電を制御する。以下、順に説明していく。
ソーラECU31は、車載太陽電池21から自身の消費電力L1よりも大きな発電量Pが供給されている状況においては、充電センサ31aから取得したサブバッテリ19のSOCがサブバッテリ19に対して予め設定された所定の充電量であるSOCs以下となっているときに、図3に示すように、余剰電力(P−L1)をサブバッテリ19に供給する。すなわち、ソーラECU31は、ソーラ充電器23の充電制御回路23aを介して電力供給先をサブバッテリ19に選択し、低圧充電用DC/DCコンバータを介して余剰電力(P−L1)を所定の電圧に変圧するとともに整流する。そして、ソーラECU31は、低圧電源ラインPTL2を通してサブバッテリ19に余剰電力(P−L1)を供給して蓄電する。
ソーラECU31は、充電センサ31aから取得したサブバッテリ19のSOCが所定の充電量であるSOCsを超えたときには、図4に示すように、余剰電力(P−L1)をテンポラリバッテリ22に供給する。すなわち、ソーラECU31は、ソーラ充電器23の充電制御回路23aを介して電力供給先をテンポラリバッテリ22に選択し、低圧充電用DC/DCコンバータを介して余剰電力(P−L1)を所定の電圧に変圧するとともに整流する。そして、ソーラECU31は、テンポラリバッテリ22に余剰電力(P−L1)を供給して蓄電する。ここで、余剰電力(P−L1)をテンポラリバッテリ22に充電するために必要な充電時間ttは、テンポラリバッテリ22におけるSOCの変化量をΔSOCとし、充電制御部回路23aからテンポラリバッテリ22に電力を供給する際の効率をeNi_inとすると、tt=ΔSOC/eNi_in(P−L1)と表すことができる。
この場合においては、サブバッテリ19のSOCが所定の充電量であるSOCsを超え、かつ、テンポラリバッテリ22のSOCが所定の充電量であるSOCtを超えた状態にある。このため、ソーラECU31は、余剰電力(P−L1)を、電力供給部20のソーラ充電器23の充電制御回路23aを介して、車両100に搭載された複数の補機及び複数の電子制御機器の作動に対して供給して消費する。そして、ソーラECU31は、複数の補機及び複数の電子制御機器の作動に伴って消費される全消費電力Lallに対して供給した余剰電力(P−L1)では不足するため、電力の不足分を電力供給部20のテンポラリバッテリ22から供給する。尚、この場合、テンポラリバッテリ22から不足分の電力を供給することに代えて、サブバッテリ19から不足分の電力を供給することも可能である。
車載太陽電池21による発電量Pが複数の補機等による全消費電力Lall(所定の電力)よりも大きい場合にも、太陽光発電による電力の供給を受けて起動したソーラECU31は、上述した(1)L1<P≦Lallの場合と同様に、a.)余剰電力(P−L1)を所定のSOCs以下となっているサブバッテリ19に供給、b.)サブバッテリ19のSOCが所定のSOCsを超えたとき余剰電力(P−L1)をテンポラリバッテリ22に供給、c.)テンポラリバッテリ22のSOCが所定のSOCtを超えたときメインバッテリ18に供給の順に従って供給して充電を制御する。ただし、c.)におけるメインバッテリ18への充電の制御のみが異なる。
Claims (4)
- 駆動力を発生する発電電動機と、前記発電電動機と電気的に接続されて電力を供給する主蓄電装置を有して、少なくとも前記発電電動機が発生する前記駆動力を利用した走行が可能な車両に適用され、
前記車両に搭載された車載太陽電池と、前記車載太陽電池によって発電された電力を一時的に蓄電する一時蓄電装置とを有して電力を供給する電力供給部と、前記電力供給部と協働して前記主蓄電装置及び前記一時蓄電装置の充電を制御する充電制御部とを含む車載太陽電池を利用する充電制御装置であって、
前記充電制御部が、前記一時蓄電装置の充電量が予め設定された所定の充電量を超えていて前記一時蓄電装置に一時的に蓄電された電力を前記主蓄電装置に充電しているとき、
前記電力供給部は、
前記車載太陽電池から前記充電制御部及び前記主蓄電装置のうち少なくとも前記充電制御部に発電された電力を供給することを特徴とする車載太陽電池を利用する充電制御装置。 - 請求項1に記載した車載太陽電池を利用する充電制御装置において、
前記電力供給部は、
前記車載太陽電池によって発電された電力が予め設定された所定の電力以下のときは、前記車載太陽電池から前記充電制御部に発電された電力を供給し、
前記車載太陽電池によって発電された電力が前記所定の電力よりも大きいときは、前記車載太陽電池から前記充電制御部及び前記主蓄電装置に発電された電力を供給することを特徴とする車載太陽電池を利用する充電制御装置。 - 請求項2に記載した車載太陽電池を利用する充電制御装置において、
前記所定の電力は、前記車両に搭載された複数の補機及び複数の電子制御機器が作動することによって消費される全消費電力に基づいて設定されるものであり、
前記電力供給部は、
前記車載太陽電池によって発電された電力が前記全消費電力に基づいて設定された所定の電力よりも大きいときは、
前記車載太陽電池から前記充電制御部と前記車両に搭載された複数の補機及び複数の電子制御機器とに対して発電された電力を供給するとともに、前記車載太陽電池から前記主蓄電装置に対して前記発電された電力から前記全消費電力を減じた残りの余剰電力を供給することを特徴とする車載太陽電池を利用する充電制御装置。 - 請求項3に記載した車載太陽電池を利用する充電制御装置において、
前記電力供給部は、
前記車載太陽電池によって発電された電力が前記全消費電力に基づいて設定された所定の電力以下のときは、
前記車載太陽電池から前記充電制御部に対して発電された電力を供給するとともに、前記車載太陽電池から前記車両に搭載された複数の補機及び複数の電子制御機器に対して前記発電された電力から前記充電制御部の作動に伴って消費される消費電力を減じた残りの余剰電力を供給することを特徴とする車載太陽電池を利用する充電制御装置。
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