JP2021131961A - 燃料電池システム - Google Patents
燃料電池システム Download PDFInfo
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- JP2021131961A JP2021131961A JP2020026058A JP2020026058A JP2021131961A JP 2021131961 A JP2021131961 A JP 2021131961A JP 2020026058 A JP2020026058 A JP 2020026058A JP 2020026058 A JP2020026058 A JP 2020026058A JP 2021131961 A JP2021131961 A JP 2021131961A
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- 239000000446 fuel Substances 0.000 title claims abstract description 183
- 239000003507 refrigerant Substances 0.000 claims abstract description 147
- 238000000034 method Methods 0.000 claims abstract description 38
- 230000008859 change Effects 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 33
- 230000000630 rising effect Effects 0.000 claims abstract description 27
- 230000009467 reduction Effects 0.000 claims abstract description 17
- 230000007423 decrease Effects 0.000 claims description 16
- 239000007789 gas Substances 0.000 abstract description 67
- 239000007800 oxidant agent Substances 0.000 abstract description 57
- 239000001257 hydrogen Substances 0.000 abstract description 15
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000005086 pumping Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000002737 fuel gas Substances 0.000 description 63
- 230000001590 oxidative effect Effects 0.000 description 57
- 230000001105 regulatory effect Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000007788 liquid Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 9
- 238000010248 power generation Methods 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
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- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
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- 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
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Abstract
Description
この形態によれば、制御部は、第1時点以降では、減少速度を第1時点より前に設定された値よりも小さい値に設定することで、燃料電池スタックに流入する冷媒の流量が大きく変化することを抑制できる。よって、燃料電池スタックの温度が冷媒によって大きく低下することを抑制できるので、燃料電池スタック内の生成水が凍結する可能性を低減できる。これにより、カソードへの酸化剤ガスの供給が阻害されることを抑制できるので、ポンピング水素の発生を抑制できる。
(2)上記形態において、前記制御部は、前記減少速度をゼロに設定することで、前記減少速度を前記第1時点より前に設定された値よりも小さくしてもよい。
この形態によれば、燃料電池スタックへ流入する冷媒の流量が大きく変動することをさらに抑制できるので、燃料電池スタック内の生成水が凍結する可能性をさらに低減できる。これにより、ポンピング水素の発生をさらに抑制できる。
(3)上記形態において、前記制御部は、前記第1時点以降において、前記取得温度の変化が上昇から下降に最初に転じた後に、前記取得温度の変化が下降から上昇に転じた第2時点以降では、前記減少速度を、前記第1時点から前記第2時点以前までの値よりも小さい値に設定してもよい。
この形態によれば、回転数を減少させる場合の減少速度について、第2時点以降では第1時点から第2時点以前までの値よりも小さい値に設定することで、燃料電池スタックへ流入する冷媒の温度が大きく変動することを抑制できる。これにより、燃料電池スタック内の生成水が凍結する可能性をさらに低減できので、ポンピング水素の発生をさらに抑制できる。
本開示は、種々の形態で実現することが可能であり、上記の燃料電池システムの他に、例えば、燃料電池システムの制御方法、制御方法をコンピューターに実行させるためのコンピュータープログラム、コンピュータープログラムを記録した非一過性の記録媒体などの形態で実現することができる。
図1は、燃料電池システム10の概略構成を説明するための図である。燃料電池システム10は、例えば、燃料電池車両12に搭載され、燃料電池車両12の駆動用モータを駆動させるための発電装置として用いられる。燃料電池システム10は、燃料電池スタック116と、燃料ガス給排系50と、酸化剤ガス給排系30と、冷媒循環系70とを備える。
図8は、第2実施形態の暖機運転処理における、取得温度と回転数との関係を示す図である。第2実施形態の暖機運転処理と、第1実施形態の暖機運転処理との異なる点は、下降レート変更処理の内容である。その他の燃料電池システム10の構成や、その他の暖機運転処理の内容は第1実施形態と同様であるため、同様の構成や処理については適宜説明を省略する。
C−1.第1の他の実施形態:
上記第1実施形態では、制御部62は、下降レート変更制御において、下降レートDrを無限大に設定していたがこれに限定されるものではない。例えば、制御部62は、下降レート変更制御において、下降レートDrを通常制御の場合の値Rb1に比べて大きな値(例えば、値Rb1の5倍や10倍)に設定してもよい。
上記各実施形態において、燃料電池システム10は、燃料電池スタック116の一方の端部側からのみ、燃料ガス、酸化剤ガス、冷媒を供給したり排出したりしていたが、これに限定されるものではない。例えば、燃料電池システム10は、燃料電池スタック116の一方の端部側から燃料ガス、酸化剤ガス、冷媒を供給し、他方の端部側から燃料ガス、酸化剤ガス、冷媒を排出してもよい。
Claims (3)
- 燃料電池システムであって、
燃料電池スタックと、
前記燃料電池スタックに冷媒を循環させる冷媒循環流路と、
前記冷媒循環流路に配置され、前記冷媒の循環流量を調整する冷媒循環ポンプと、
前記燃料電池スタックの温度を取得するスタック温度取得部と、
前記スタック温度取得部の取得温度を用いて前記冷媒循環ポンプの動作を制御する制御部と、を備え、
前記制御部は、
予め定めた条件が満たされた場合に、前記燃料電池スタックの発熱を利用して前記燃料電池スタックを昇温させる前記燃料電池スタックの暖機運転処理を実行し、
前記暖機運転処理において、前記取得温度に応じて前記冷媒循環ポンプを駆動し、
前記暖機運転処理の開始後において、前記取得温度の変化が上昇から下降に最初に転じた後に、前記取得温度の変化が下降から上昇に転じた第1時点以降では、前記冷媒循環ポンプの回転数を減少させる場合の減少速度を、前記第1時点より前に設定された値よりも小さい値に設定する、燃料電池システム。 - 請求項1に記載の燃料電池システムであって、
前記制御部は、前記減少速度をゼロに設定することで、前記減少速度を前記第1時点より前に設定された値よりも小さくする、燃料電池システム。 - 請求項1に記載の燃料電池システムであって、
前記制御部は、前記第1時点以降において、前記取得温度の変化が上昇から下降に最初に転じた後に、前記取得温度の変化が下降から上昇に転じた第2時点以降では、前記減少速度を、前記第1時点から前記第2時点以前までの値よりも小さい値に設定する、燃料電池システム。
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CN202110153840.1A CN113285103A (zh) | 2020-02-19 | 2021-02-04 | 燃料电池系统 |
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CN113285103A (zh) | 2021-08-20 |
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