JP4506980B2 - ハイブリッド燃料電池システム及びその電圧変換制御方法 - Google Patents
ハイブリッド燃料電池システム及びその電圧変換制御方法 Download PDFInfo
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- JP4506980B2 JP4506980B2 JP2005517798A JP2005517798A JP4506980B2 JP 4506980 B2 JP4506980 B2 JP 4506980B2 JP 2005517798 A JP2005517798 A JP 2005517798A JP 2005517798 A JP2005517798 A JP 2005517798A JP 4506980 B2 JP4506980 B2 JP 4506980B2
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- 239000000446 fuel Substances 0.000 title claims description 56
- 238000006243 chemical reaction Methods 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 239000002737 fuel gas Substances 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- B60L15/2045—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for optimising the use of energy
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- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
- B60L58/33—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by cooling
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- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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Description
料電池システムの電圧変換制御方法において、電圧変換器は、複数の相を備えており、電
圧変換器の各相は、互いに位相の異なる交流電流をそれぞれ取り扱うものである。そして
、電圧変換器を通過するパワーの相当値を検出するステップと、検出された相当値に対応
させて使用する相の数を変更するステップと、を備える。そして、相の数を変更するステ
ップは、電圧変換器において、複数の相で運転する複数相運転と単数の相で運転する相で
運転する単相運転とを切り換えるものであって、複数相運転時には、相当値が第1の値よ
り小さくなった場合に単相運転に切り換え、単相運転時には、相当値が第1の値より大き
い第2の値を超えた場合に複数相運転に切り換え、複数相運転と単相運転とを切り換える
際には、同期させて実行することを特徴とする。
本発明の実施形態は、電気自動車に搭載する燃料電池システムに本発明を適用したものである。
図1に本ハイブリッド燃料電池システム1のシステム全体図を示す。当該ハイブリッド燃料電池システム1は、DC−DCコンバータ20、二次電池21、燃料電池22、逆流防止用ダイオード23、インバータ24、三相モータ25、減速装置26、シャフト27、車輪29、電源制御部10、走行制御部11を備えている。
まず、電源制御部10は、図示しない水素圧センサ(例えば、燃料電池スタックのアノード側ガス通路に設けたもの)・温度センサ(例えば、燃料電池スタックの冷却液出口に設けられたもの)からの検出信号を参照して、燃料電池スタック22の出力電流―出力電圧(I−V)特性を特定する(S1)。燃料ガスである水素の供給圧が一定である場合、燃料電池の出力電流と出力電圧との関係は一義的に定まる。またこの関係は燃料電池の温度にも影響を受ける。ROM103等には水素の供給圧ごとに、このような温度とI−V特性との関係を特定するデータテーブルが格納されており、電源制御部10はこのテーブルを参照して検出された温度に対応する出力電流―出力電圧特性を決定することができる。検出された温度に対応するデータテーブルが存在しない場合にはその前後の温度についてのデータテーブルを参照して、それぞれのデータテーブル上の特性値を検出された温度で加重平均して近似した出力電流―出力電圧特性を計算する。
本発明は上記実施形態以外にも種々に変更して適用することが可能である。
例えば、上記実施形態では三相運転と単相運転とを切り換えたが、異なる組合せ、例えば三相運転と二相運転とを切り換えたり、二相運転と単相運転とを切り換えたりする制御であってもよい。
Claims (4)
- 燃料電池と蓄電装置とを電圧変換器を介して接続するハイブリッド燃料電池システムにおいて、
前記電圧変換器は、複数の相を備える三相ブリッジ形コンバータであって、
前記電圧変換器を通過するパワーの相当値に応じて、前記電圧変換器で使用させる前記相の数を変更する制御部を備え、
前記制御部は、
前記電圧変換器において、複数の前記相で運転する複数相運転と単数の前記相で運転する単相運転とを切り換えるものであって、
前記複数相運転時には、前記相当値が第1の値より小さくなった場合に前記単相運転に切り換え、
前記単相運転時には、前記相当値が前記第1の値より大きい第2の値を超えた場合に前記複数運転に切り換え、
前記電圧変換器の各相は、他の相と位相の異なる交流電流をそれぞれ取り扱うものであり、
前記相の数を切り換える際には、前記制御部は同期させて実行すること、
を特徴とする、ハイブリッド燃料電池システム。 - 燃料電池と蓄電装置とを電圧変換器を介して接続するハイブリッド燃料電池システムにおいて、
前記電圧変換器は、複数の相を備える三相ブリッジ形コンバータであって、
前記電圧変換器の入出力変換エネルギー量または作動仕事量の相当値に応じて、前記電圧変換器で使用させる前記相の数を変更する制御部を備え、
前記制御部は、
前記電圧変換器において、複数の前記相で運転する複数相運転と単数の前記相で運転する単相運転とを切り換えるものであって、
前記複数相運転時には、前記相当値が第1の値より小さくなった場合に前記単相運転に切り換え、
前記単相運転時には、前記相当値が前記第1の値より大きい第2の値を超えた場合に前記複数運転に切り換え、
前記電圧変換器の各相は、他の相と位相の異なる交流電流をそれぞれ取り扱うものであり、
前記相の数を切り換える際には、前記制御部は同期させて実行すること、
を特徴とするハイブリッド燃料電池システム。 - 燃料電池と蓄電装置とを電圧変換器を介して接続するハイブリッド燃料電池システムの電圧変換制御方法において、
前記電圧変換器は、複数の相を備えており、
前記電圧変換器の各相は、他の相と位相の異なる交流電流をそれぞれ取り扱うものであり、
前記電圧変換器を通過するパワーの相当値を検出するステップと、
検出された前記相当値に対応させて使用する前記相の数を変更するステップと、を備え、
前記相の数を変更するステップは、
前記電圧変換器において、複数の前記相で運転する複数相運転と単数の前記相で運転する単相運転とを切り換えるものであって、
前記複数相運転時には、前記相当値が第1の値より小さくなった場合に前記単相運転に切り換え、
前記単相運転時には、前記相当値が前記第1の値より大きい第2の値を超えた場合に前記複数運転に切り換え、
前記相の数を切り換える際には、同期させて実行すること、
ハイブリッド燃料電池システムの電圧変換制御方法。 - 前記蓄電装置は、前記電圧変換器の一次側に接続され、
前記燃料電池は、前記電圧変換器の二次側に接続され、
前記燃料電池は、電力を供給可能に負荷装置に接続されている、請求項1または2に記載のハイブリッド燃料電池システム。
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