Piping unit for fuel cell, fuel cell unit equipped with piping unit and fuel cell system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-008/04
H01M-008/24
H01M-008/04082(2016.01)
H01M-008/2484
H01M-008/04746(2016.01)
H01M-008/04007(2016.01)
H01M-008/04089(2016.01)
H01M-008/04119(2016.01)
H01M-008/04223(2016.01)
H01M-008/1018
출원번호
US-0809606
(2010-07-13)
등록번호
US-9711812
(2017-07-18)
국제출원번호
PCT/JP2010/004550
(2010-07-13)
§371/§102 date
20130306
(20130306)
국제공개번호
WO2012/007989
(2012-01-19)
발명자
/ 주소
Katano, Koji
Miyanaga, Naritsune
Mishima, Takashi
출원인 / 주소
TOYOTA JIDOSHA KABUSHIKI KAISHA
대리인 / 주소
Andrews Kurth Kenyon LLP
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
A piping unit includes a cathode gas supply passage arranged to supply a cathode gas, and a cathode gas discharge passage arranged to discharge a cathode off-gas. The cathode gas supply passage includes a cathode supply valve, upstream cathode gas piping and downstream cathode gas piping. The cathod
A piping unit includes a cathode gas supply passage arranged to supply a cathode gas, and a cathode gas discharge passage arranged to discharge a cathode off-gas. The cathode gas supply passage includes a cathode supply valve, upstream cathode gas piping and downstream cathode gas piping. The cathode gas discharge passage includes a cathode exhaust valve, upstream cathode off-gas piping and downstream cathode off-gas piping. The cathode gas supply passage and the cathode gas discharge passage are connected with each other by cathode bypass piping and are integrated with each other by joining the cathode supply valve with the upstream cathode off-gas piping.
대표청구항▼
1. A piping unit for a fuel cell, which is connected with the fuel cell having a cathode gas supply manifold and a cathode gas exhaust manifold formed in one end plate, the piping unit for the fuel cell comprising: a cathode gas supply passage arranged to supply a cathode gas to the fuel cell; anda
1. A piping unit for a fuel cell, which is connected with the fuel cell having a cathode gas supply manifold and a cathode gas exhaust manifold formed in one end plate, the piping unit for the fuel cell comprising: a cathode gas supply passage arranged to supply a cathode gas to the fuel cell; anda cathode gas discharge passage arranged to discharge a cathode off-gas from the fuel cell, wherein the cathode gas supply passage includes: a cathode supply valve configured to control flow of the cathode gas; upstream cathode gas piping connected with an inlet of the cathode supply valve; and downstream cathode gas piping connected with an outlet of the cathode supply valve and connected with the cathode gas supply manifold,the cathode gas discharge passage includes: a cathode exhaust valve configured to control flow of the cathode off-gas; upstream cathode off-gas piping connected with an inlet of the cathode exhaust valve and connected with the cathode gas exhaust manifold; and downstream cathode off-gas piping connected with an outlet of the cathode exhaust valve,the cathode supply valve is fixed to the end plate via the downstream cathode gas piping and an outlet of the cathode supply valve is open toward the end plate,the cathode supply gas passage includes a cathode bypass piping arranged to connect the upstream cathode gas piping with the downstream cathode off-gas piping and bypass part of the cathode gas to the downstream cathode off-gas piping, and a bypass piping valve configured to control flow of the cathode gas in the cathode bypass piping,the cathode gas supply passage and the cathode gas discharge passage are coupled with each other integrally by the cathode bypass piping that connects the upstream cathode gas piping and the downstream cathode off-gas piping,the downstream cathode gas piping has a passage outer wall formed to surround an outer periphery of an outlet of the cathode supply valve and the gas supply manifold, and gradually widen along the outer surface of the end plate in a direction from the outlet of the cathode supply valve to the gas supply manifold, andthe passage outer wall is attached to the end plate to form a cavity between an inner wall surface of the passage outer wall and the outer surface of the end plate extending from the outlet of the cathode supply valve to the cathode gas supply manifold such that the outer surface of the end plate is used as a guide wall surface to introduce the cathode gas to the gas supply manifold. 2. The piping unit for the fuel cell according to claim 1, wherein the cathode supply valve is placed in a plane of the end plate and is located above the cathode exhaust valve in a direction of gravity,the upstream cathode gas piping is extended along outer surface of the end plate to be connected with the cathode supply valve,the downstream cathode off-gas piping is located below the upstream cathode gas piping in the direction of gravity to be more distant away from the end plate than the upstream cathode gas piping and is extended in parallel to the upstream cathode gas piping to be connected with the cathode exhaust valve. 3. The piping unit for the fuel cell according to claim 2, further comprising: an anode gas discharge passage arranged to discharge an anode off-gas from the fuel cell, wherein the anode gas discharge passage includes: anode off-gas piping connected with an anode gas exhaust manifold formed in the end plate and configured to have a gas-liquid separating structure to separate water from the anode off-gas; separate gas piping arranged to introduce a gas component separated by the gas-liquid separating structure; and separate water drainage piping arranged to introduce and discharge the water separated by the gas-liquid separating structure,the separate water drainage piping has a bottom face provided to be located above a bottom face of the downstream cathode off-gas piping in the direction of gravity, andthe anode gas discharge passage is located between the end plate and the downstream cathode off-gas piping and is integrated with the cathode gas discharge passage by the separate water drainage piping inclined downward in the direction of gravity to and connected with the downstream cathode off-gas piping. 4. The piping unit for the fuel cell according to claim 3, wherein the downstream cathode off-gas piping is connected with the cathode exhaust valve at a first connecting location and is connected with the separate water drainage piping at a second connecting location, andthe cathode bypass piping is inclined to and connected with the downstream cathode off-gas piping to be open toward either the first connecting location or the second connecting location. 5. The piping unit for the fuel cell according to claim 2, wherein the upstream cathode off-gas piping includes a first gas tube section inclined upward in the direction of gravity from a junction with the cathode gas exhaust manifold, and a second gas tube section extended downward in the direction of gravity from the first gas tube section. 6. The piping unit for the fuel cell according to claim 2, wherein the cathode bypass piping includes an upstream tube section extended from the upstream cathode gas piping in a direction opposite to the end plate, and a downstream tube section bent from the upstream tube section and extends toward the downstream cathode off-gas piping located below the downstream tube section in the direction of gravity, andthe bypass piping valve is placed inside the downstream tube section and has a valve plug configured to move along a piping direction of the downstream tube section and a valve seat located below the valve plug in the direction of gravity and configured to receive the valve plug. 7. The piping unit for the fuel cell according to claim 1, wherein the cathode supply valve is configured to have an inlet formed to be open to a direction along outer surface of the end plate and an outlet formed to be open to the outer surface of the end plate. 8. The piping unit for the fuel cell according to claim 1, wherein the cathode supply valve is a poppet valve opened and closed by moving a valve plug along an opening direction of the inlet, andthe upstream cathode gas piping has a cross-sectional shape substantially fixed from an upstream end to a downstream end. 9. A fuel cell unit, comprising: a fuel cell having a cathode gas supply manifold and a cathode gas exhaust manifold formed in one end plate;the piping unit for the fuel cell according to claim 1 to be connected with the fuel cell; anda housing provided to place the fuel cell and the piping unit for fuel cell therein, wherein the housing has a bulkhead formed between the downstream cathode off-gas piping of the piping unit for fuel cell and the end plate of the fuel cell. 10. A fuel cell system, comprising: a fuel cell having a cathode gas supply manifold and a cathode gas exhaust manifold formed in one end plate;the piping unit for the fuel cell according to claim 6 to be connected with the fuel cell;a controller configured to control opening/closing of the cathode exhaust valve and the bypass piping valve of the piping unit for fuel cell, so as to regulate a flow rate of a cathode gas to be supplied to the fuel cell; anda stuck-open state detector configured to detect a stuck-open state of the bypass piping valve, wherein when the stuck-open state detector detects the stuck-open state of the bypass piping valve, the controller controls the cathode exhaust valve to be closed, so as to increase a flow rate of a gas flowing into the bypass piping valve and thereby increase an external force applied to the valve plug. 11. The piping unit for the fuel cell according to claim 2, wherein the upstream cathode off-gas piping is extended from the cathode exhaust valve beyond the cathode supply valve upward in the direction of gravity to be connected with the cathode gas exhaust manifold. 12. The piping unit for the fuel cell according to claim 1, wherein prior to being integrated with each other via the cathode bypass piping, the cathode gas supply passage and the cathode gas discharge passage are separate parts.
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이 특허에 인용된 특허 (2)
Horiuchi Yoshimi (Kawasaki JPX), Fuel cell power generation system and method of controlling the same.
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