JP2016095903A - 燃料電池システムおよび燃料電池搭載車両 - Google Patents
燃料電池システムおよび燃料電池搭載車両 Download PDFInfo
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Abstract
【解決手段】燃料電池搭載車両に用いられる燃料電池システムは、燃料電池と、前記燃料電池に燃料ガスを供給する燃料ガス供給部と、前記燃料電池からの燃料排ガスを排出する燃料ガス排出部と、制御部と、を備え、前記燃料電池の運転が終了した際、前記制御部は、(a)前記燃料電池の燃料排ガスを排気して減圧する排気処理と、(b)前記排気処理の後、燃料電池に燃料ガスを供給して前記燃料電池の中の燃料ガスの分圧を上げる処理と、を実行する。
【選択図】図4
Description
図1は、燃料電池を搭載した車両を示す説明図である。燃料電池搭載車両10は、燃料電池100と、制御部110(ECU(Electronic Control Unit)とも呼ぶ。)と、スタータースイッチ115と、要求出力検知部120と、二次電池130と、電力分配コントローラ140と、駆動モータ150と、ドライブシャフト160と、動力分配ギア170と、車輪180と、を備える。
H2 → 2H++2e− …(1)
(1/2)O2+2H++2e− → H2O …(2)
したがって、上記反応を抑制するためには、アノード極に残留する水素や、カソード極に残留する酸素を減らすことが望ましい。ここで、アノード極に残留する水素を減らすと、アノード側触媒層103を劣化させるおそれがある。そのため、アノード極にある程度の水素を残留させ、カソード極に残留する酸素を消費させる。なお、酸素を消費させれば、カソード側触媒層の触媒の酸化も抑制できるという利点もある。ここで、アノード極に残留する水素は、カソード極に拡散し易い。そのため、アノード極に残留する水素の分圧を大きくしすぎると、カソード極側に拡散する水素が多くなる。その結果、燃料電池100の次回の起動時にカソード極から排出される水素の濃度が高くなりすぎる。かかる場合、水素を希釈するためにエアコンプレッサ320の回転数を上げるため、燃費やノイズバイブレーションにおいて、不利となる。
P1>P3>P2>>P4
P2>大気圧
なお、第4の圧力P4の大きさは、燃料電池100の電解質膜101の水素の透過性および次回の再起動までの時間をどの程度と設定するか、により異なる。
制御部110は、ステップS110において、調圧弁420を閉じることにより、排ガス管410から空気が逆流して燃料電池100に供給されることを抑制している。しかし、制御部110は、調圧弁420を閉じずに、ステップS120で、燃料電池100から電流を引くことで、燃料電池100の発電を行わせてもよい。
100…燃料電池
101…電解質膜
102…カソード側触媒層
103…アノード側触媒層
104…カソード側ガス流路
105…アノード側ガス流路
110…制御部
115…スタータースイッチ
120…要求出力検知部
130…二次電池
140…電力分配コントローラ
150…駆動モータ
160…ドライブシャフト
170…動力分配ギア
180…車輪
200…燃料ガス供給回路
210…燃料ガスタンク
220…燃料ガス供給管
230…燃料ガス排気管
240…燃料ガス還流管
250…主止弁
260…レギュレーター
280…気液分離器
290…水素ポンプ
300…酸化剤ガス供給回路
310…エアクリーナ
320…ポンプ(エアコンプレッサ)
330…酸化剤ガス供給管(酸化剤ガス供給流路)
340…分流弁
350…大気圧センサ
360…外気温センサ
370…エアフローメータ
380…供給ガス温度センサ
390…供給ガス圧力センサ
400…排ガス回路
410…排ガス管
420…調圧弁
430…燃料ガス排出管
440…排気排水弁
450…酸化剤ガスバイパス管
470…サイレンサー
500…冷却回路
510…冷却水供給管
515…冷却水排出管
520…ラジエータ管
525…ウォーターポンプ
530…ラジエータ
535…ラジエータファン
540…バイパス管
545…三方弁
Claims (7)
- 燃料電池搭載車両に用いられる燃料電池システムであって、
燃料電池と、
前記燃料電池に燃料ガスを供給する燃料ガス供給部と、
前記燃料電池からの燃料排ガスを排出する燃料ガス排出部と、
制御部と、
を備え、
前記燃料電池の運転が終了した際、前記制御部は、
(a)前記燃料電池の燃料排ガスを排気して減圧する排気処理と、
(b)前記排気処理の後、燃料電池に燃料ガスを供給して前記燃料電池の中の燃料ガスの分圧を上げる処理と、
を実行する、燃料電池システム。 - 請求項1に記載の燃料電池システムにおいて、
前記制御部は、前記燃料電池内の燃料ガスの分圧を算出し、前記燃料ガスの分圧が所定の分圧以上となるまで、前記処理(a)(b)を繰り返す、燃料電池システム。 - 請求項1または2に記載の燃料電池システムにおいて、
前記処理(a)が行われた後の前記燃料電池の内部の圧力は、大気圧よりも高い、燃料電池システム。 - 請求項1〜3のいずれか一項に記載の燃料電池システムにおいて、
前記燃料電池に酸化剤ガスを供給する酸化剤ガス供給部と、
前記燃料電池の酸化剤排ガスを排出する酸化剤ガス排出部と、
前記酸化剤ガスを前記燃料電池に供給せずに前記酸化剤ガス排出部に排出するバイパス管と、
前記酸化剤ガスを前記燃料電池と前記バイパス管とに分流するための分流弁と、
前記酸化剤ガス排出部と前記バイパス管との接続部と、前記燃料電池との間に設けられた調圧弁と、
を備え、
前記制御部は、前記処理(a)の前に、(c)前記調圧弁を閉じるとともに、前記分流弁を用いて前記燃料電池に前記酸化剤ガスを供給せずに前記燃料電池から電流を引くことによって前記燃料電池の中の酸化剤ガスを消費する処理を行う、燃料電池システム。 - 請求項4に記載の燃料電池システムにおいて、
前記制御部は、前記処理(c)を前記燃料電池の電圧が、予め定められた電圧未満になるまで実行する、燃料電池システム。 - 請求項1〜5のいずれか一項に記載の燃料電池システムにおいて、
前記燃料電池に酸化剤ガスを供給する酸化剤ガス供給部と、
前記燃料電池の酸化剤排ガスを排出する酸化剤ガス排出部と、
前記酸化剤ガスを前記燃料電池に供給せずに前記酸化剤ガス排出部に排出するバイパス管と、
前記酸化剤ガスを前記燃料電池と前記バイパス管とに分流するための分流弁と、
を備え、
前記燃料ガス排出部と前記酸化剤ガス排出部とは接続されており、
前記制御部は、前記処理(a)を行うときに、全ての酸化剤ガスが前記バイパス管に流れるように前記分流弁を制御し、排出される燃料ガスを希釈して大気に排出する、燃料電池システム。 - 請求項1〜6のいずれか一項に記載の燃料電池システムを備える、燃料電池搭載車両。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2014229400A JP6137124B2 (ja) | 2014-11-12 | 2014-11-12 | 燃料電池システムおよび燃料電池搭載車両 |
KR1020150156563A KR101923764B1 (ko) | 2014-11-12 | 2015-11-09 | 연료 전지 시스템 및 연료 전지 탑재 차량 |
CA2911603A CA2911603C (en) | 2014-11-12 | 2015-11-09 | Fuel cell system and vehicle equipped with fuel cell |
US14/937,107 US10573908B2 (en) | 2014-11-12 | 2015-11-10 | Fuel cell system and vehicle equipped with fuel cell |
CN201510761909.3A CN105591127B (zh) | 2014-11-12 | 2015-11-10 | 燃料电池系统和配备有燃料电池的车辆 |
EP15194124.2A EP3021404B1 (en) | 2014-11-12 | 2015-11-11 | Fuel cell system and vehicle equipped with fuel cell |
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JP2018097951A (ja) * | 2016-12-09 | 2018-06-21 | トヨタ自動車株式会社 | 燃料電池システム |
JP2020009575A (ja) * | 2018-07-05 | 2020-01-16 | パナソニックIpマネジメント株式会社 | 燃料電池システム並びにその運転方法 |
JP7481960B2 (ja) | 2020-08-31 | 2024-05-13 | 株式会社東芝 | 燃料電池システム |
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CN113130942B (zh) * | 2019-12-30 | 2023-01-24 | 未势能源科技有限公司 | 一种燃料电池氢气循环系统和燃料电池车辆 |
JP7276251B2 (ja) * | 2020-05-28 | 2023-05-18 | トヨタ自動車株式会社 | 燃料電池システム |
CN116053527B (zh) * | 2023-03-28 | 2023-06-06 | 佛山市清极能源科技有限公司 | 一种燃料电池系统的尾气排放方法 |
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CN105591127A (zh) | 2016-05-18 |
KR101923764B1 (ko) | 2018-11-29 |
CA2911603A1 (en) | 2016-05-12 |
CA2911603C (en) | 2018-12-04 |
EP3021404A1 (en) | 2016-05-18 |
JP6137124B2 (ja) | 2017-05-31 |
US10573908B2 (en) | 2020-02-25 |
EP3021404B1 (en) | 2018-10-24 |
KR20160056803A (ko) | 2016-05-20 |
CN105591127B (zh) | 2018-10-26 |
US20160133962A1 (en) | 2016-05-12 |
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