JP2021131957A - 燃料電池システムにおける電解質膜・電極構造体の劣化検出方法 - Google Patents
燃料電池システムにおける電解質膜・電極構造体の劣化検出方法 Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 137
- 239000012528 membrane Substances 0.000 title claims abstract description 52
- 239000003792 electrolyte Substances 0.000 title claims abstract description 50
- 230000006866 deterioration Effects 0.000 title claims abstract description 43
- 238000001514 detection method Methods 0.000 title abstract description 15
- 239000002737 fuel gas Substances 0.000 claims abstract description 98
- 230000008859 change Effects 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 111
- 239000007800 oxidant agent Substances 0.000 claims description 66
- 238000000034 method Methods 0.000 claims description 36
- 230000007423 decrease Effects 0.000 claims description 4
- 239000002828 fuel tank Substances 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 description 56
- 238000004891 communication Methods 0.000 description 31
- 238000010248 power generation Methods 0.000 description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 17
- 239000001257 hydrogen Substances 0.000 description 14
- 229910052739 hydrogen Inorganic materials 0.000 description 14
- 230000008569 process Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000005518 polymer electrolyte Substances 0.000 description 5
- 230000001629 suppression Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
Description
[構成]
図1は、実施形態に係る燃料電池システムにおける電解質膜・電極構造体の劣化検出方法が実施される燃料電池システム12を搭載した車両(燃料電池車両)10の構成例を示す概略ブロック図である。
基本的には以上のように構成される燃料電池システム12を搭載した燃料電池車両10の走行時等における通常動作(それぞれ加減速動作を伴う市中走行、郊外走行、及び高速道走行等の通常走行時発電動作)について、図1のブロック図に、燃料ガス、酸化剤ガス、及び電力の流れに沿って矢線を付した図3を参照して、以下に説明する。
以上が走行時等における燃料電池システム12の通常動作の説明である。次に、この発明の要部に係わる燃料電池システムにおける電解質膜・電極構造体の劣化検出方法について、これを実施する燃料電池システム12を搭載する燃料電池車両10との関係において、図4のフローチャートを参照して、以下に説明する。
ここで、上記実施形態から把握し得る発明について、以下に記載する。なお、理解の便宜のために構成要素には実施形態で用いた符号を付けているが、該構成要素は、その符号をつけたものに限定されない。
14…高圧バッテリ 16…低圧バッテリ
18…昇圧コンバータ 20…インバータ
24…負荷(モータ、回転電機) 26…昇降圧コンバータ
28…降圧コンバータ 30…制御システム
30A…統括ECU 30B…モータECU
30C…FCECU 30D…バッテリECU
30E…昇圧コンバータ用ECU 32…電源スイッチ
34…燃料電池スタック(燃料電池) 36…酸化剤ガス供給装置
38…燃料ガス供給装置 40…発電セル
41…固体高分子電解質膜 42…カソード電極
43…アノード電極 44…電解質・電極構造体
45、46…セパレータ 47…カソード流路
48…アノード流路 52…エアポンプ
54…EGRポンプ 56a…燃料ガス入口連通口
56b…燃料ガス出口連通口 57…インジェクタ
58a…酸化剤ガス入口連通口 58b…酸化剤ガス出口連通口
60、65…酸化剤ガス供給路 62…加湿器
80…水素タンク(燃料タンク) 86…エジェクタ
96…燃料ガス循環路 102a〜102e…圧力センサ
Claims (5)
- 燃料ガス供給路を通じて供給される燃料ガスが燃料ガス入口から電解質膜・電極構造体のアノード電極側に供給されると共に、燃料ガス出口からの燃料排ガスが前記燃料ガスに混合されて前記燃料ガス入口に供給される一方、酸化剤ガスが酸化剤ガス入口から前記電解質膜・電極構造体のカソード電極側に供給されて発電する燃料電池と、該燃料電池の発電電力により駆動される負荷と、前記燃料ガス出口から前記燃料ガス入口までの燃料ガス循環路に配設された圧力センサと、を備える燃料電池システムにおける前記電解質膜・電極構造体の劣化を検出する方法であって、
前記負荷の変動を抑制する負荷変動抑制工程と、
前記負荷の変動が抑制された状態で、前記燃料電池に前記燃料ガスを所定量供給した後の圧力の変化を前記圧力センサにより計測するガス圧計測工程と、を備える、
燃料電池システムにおける電解質膜・電極構造体の劣化検出方法。 - 請求項1に記載の燃料電池システムにおける電解質膜・電極構造体の劣化検出方法であって、
前記燃料ガス供給路に直列にインジェクタとエジェクタを配設し、
前記エジェクタは、前記インジェクタから供給される燃料ガスに、前記燃料排ガスを吸引して混合した燃料ガスを前記燃料ガス入口に吐出し、
前記インジェクタは、前記燃料ガスの前記所定量の供給を担う、
燃料電池システムにおける電解質膜・電極構造体の劣化検出方法。 - 請求項2に記載の燃料電池システムにおける電解質膜・電極構造体の劣化検出方法であって、
前記圧力センサが、前記エジェクタの吐出口と前記燃料ガス入口との間に配設されている、
燃料電池システムにおける電解質膜・電極構造体の劣化検出方法。 - 請求項3に記載の燃料電池システムにおける電解質膜・電極構造体の劣化検出方法であって、
前記圧力センサにより計測された検出圧力の所定時間内の低下量に基づき前記電解質膜・電極構造体の劣化の有無を判定する劣化判定工程
をさらに備える、
燃料電池システムにおける電解質膜・電極構造体の劣化検出方法。 - 請求項1〜4のいずれか1項に記載の燃料電池システムにおける電解質膜・電極構造体の劣化検出方法であって、
前記負荷が回転電機を含み、
前記負荷の変動を抑制する負荷変動抑制工程では、
前記回転電機への電力の供給が停止されている、
燃料電池システムにおける電解質膜・電極構造体の劣化検出方法。
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JP2020025871A JP7402077B2 (ja) | 2020-02-19 | 2020-02-19 | 燃料電池システムにおける電解質膜・電極構造体の劣化検出方法 |
US17/175,837 US11978932B2 (en) | 2020-02-19 | 2021-02-15 | Method of detecting degradation of membrane electrode assembly in fuel cell system |
CN202110191258.4A CN113285101A (zh) | 2020-02-19 | 2021-02-19 | 燃料电池系统中的电解质膜-电极结构体的劣化检测方法 |
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