In a fuel cell stack, gas channels and heat medium channels are disposed on one surface and the other surface of one plate, respectively. Gas channels are disposed on the other plate such that they face the gas channels in the one plate. A gas inlet header is disposed at the upper part of the gas ch
In a fuel cell stack, gas channels and heat medium channels are disposed on one surface and the other surface of one plate, respectively. Gas channels are disposed on the other plate such that they face the gas channels in the one plate. A gas inlet header is disposed at the upper part of the gas channel in the plate and a heat medium inlet header is disposed at the upper part of the heat medium channels such that they face the gas inlet header on the other side. Cooling water as a heat medium is supplied from a heat medium supply manifold hole to a heat medium inlet header. Water vapor in the reaction gas (wet fuel gas) is prevented from being condensed in the inlet area of the gas channels by heating the gas inlet header by heat conduction.
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1. A fuel cell comprising a plurality of unit cells having been stacked on each other, each of the plurality of unit cells comprising: a first cell having a first anode, a first cathode, and a first electrolyte between the first anode and the first cathode;a first fuel gas path, disposed between a f
1. A fuel cell comprising a plurality of unit cells having been stacked on each other, each of the plurality of unit cells comprising: a first cell having a first anode, a first cathode, and a first electrolyte between the first anode and the first cathode;a first fuel gas path, disposed between a first fuel gas inlet header and a first fuel gas outlet header, for providing a fuel gas to the first anode of the first cell;a first oxidant gas path, disposed between a first oxidant gas inlet header and a first oxidant gas outlet header, for providing an oxidant gas to the first cathode of the first cell;a first plate having a first surface and a second surface at opposite side to the first surface, the first fuel gas path being between the first surface of the first plate and the first anode of the first cell;a second plate having a third surface and a fourth surface at opposite side to the third surface, the first oxidant gas path being between the third surface of the second plate and the first cathode of the first cell;a second cell having a second anode, a second cathode, and a second electrolyte between the second anode and the second cathode;a second fuel gas path, disposed between a second fuel gas inlet header and a second fuel gas outlet header, for providing the fuel gas to the second anode of the second cell;a second oxidant gas path, disposed between a second oxidant gas inlet header and a second oxidant gas outlet header, for providing the oxidant gas to the second cathode of the second cell;a third plate having a fifth surface and a sixth surface at opposite side to the fifth surface, the second fuel gas path being between the fifth surface of the third plate and the second anode of the second cell;a fourth plate having a seventh surface and an eighth surface at opposite side to the seventh surface, the second oxidant gas path being between the seventh surface of the fourth plate and the second cathode of the second cell;a heat medium path, disposed between a heat medium inlet header and a heat medium outlet header, for distributing a heat medium, the heat medium path being between the fourth surface of the second plate and the sixth surface of the third plate;a third cell having a third anode, a third cathode, and a third electrolyte between the third anode and the third cathode;a third fuel gas path, disposed between a third fuel gas inlet header and a third fuel gas outlet header, for providing the fuel gas to the third anode of the third cell;a third oxidant gas path, disposed between a third oxidant gas inlet header and a third oxidant gas outlet header, for providing the oxidant gas to the third cathode of the third cell;a fifth plate having a ninth surface and a tenth surface at opposite side to the ninth surface, the third fuel gas path being between the eighth surface of the fourth plate and the third anode of the third cell, and the third oxidant gas path being between the ninth surface of the fifth plate and the third cathode of the third cell; andwherein the second fuel gas inlet header is disposed to overlap with either the first oxidant gas inlet header or the first oxidant gas outlet header in a perspective from a direction of the stacking the unit cells. 2. The fuel cell according to claim 1, wherein the first, second and third fuel gas paths and the first, second and third oxidant gas paths are substantially straight. 3. The fuel cell according to claim 1, wherein the fuel cell further comprises a flow resistance generation section between the first, second and third fuel gas inlet headers and the first, second and third fuel gas paths and/or between the first, second and third oxidant gas inlet headers and the first, second and third oxidant gas paths. 4. The fuel cell according to claim 1, wherein the heat medium inlet header is disposed at a lower stream than both a position of the fuel gas inlet header and a position of the oxidant gas inlet header and at a side direction of both a position of the fuel gas path and a position of the oxidant gas path, and the heat medium outlet header is disposed at an opposite side direction to the side direction. 5. A fuel cell comprising a plurality of unit cells having been stacked on each other, each of the plurality of unit cells comprising: a first cell having a first anode, a first cathode, and a first electrolyte between the first anode and the first cathode;a first fuel gas path, disposed between a first fuel gas inlet header and a first fuel gas outlet header, for providing a fuel gas to the first anode of the first cell;a first oxidant gas path, disposed between a first oxidant gas inlet header and a first oxidant gas outlet header, for providing an oxidant gas to the first cathode of the first cell;a first plate having a first surface and a second surface at opposite side to the first surface, the first fuel gas path being between the first surface of the first plate and the first anode of the first cell;a second plate having a third surface and a fourth surface at opposite side to the third surface, the first oxidant gas path being between the third surface of the second plate and the first cathode of the first cell;a second cell having a second anode, a second cathode, and a second electrolyte between the second anode and the second cathode;a second fuel gas path, disposed between a second fuel gas inlet header and a second fuel gas outlet header, for providing the fuel gas to the second anode of the second cell;a second oxidant gas path, disposed between a second oxidant gas inlet header and a second oxidant gas outlet header, for providing the oxidant gas to the second cathode of the second cell;a third plate having a fifth surface and a sixth surface at opposite side to the fifth surface, the second fuel gas path being between the fifth surface of the third plate and the second anode of the second cell;a fourth plate having a seventh surface and an eighth surface at opposite side to the seventh surface, the second oxidant gas path being between the seventh surface of the fourth plate and the second cathode of the second cell;a heat medium path, disposed between a heat medium inlet header and a heat medium outlet header, for distributing a heat medium, the heat medium path being between the fourth surface of the second plate and the sixth surface of the third plate;a third cell having a third anode, a third cathode, and a third electrolyte between the third anode and the third cathode;a third fuel gas path, disposed between a third fuel gas inlet header and a third fuel gas outlet header, for providing the fuel gas to the third anode of the third cell;a third oxidant gas path, disposed between a third oxidant gas inlet header and a third oxidant gas outlet header, for providing the oxidant gas to the third cathode of the third cell;a fifth plate having a ninth surface and a tenth surface at opposite side to the ninth surface, the third fuel gas path being between the eighth surface of the fourth plate and the third anode of the third cell, and the third oxidant gas path being between the ninth surface of the fifth plate and the third cathode of the third cell; andwherein the first, second and third fuel gas inlet headers are disposed to overlap with the first, second and third oxidant gas inlet headers in a perspective from a direction of the stacking the unit cells. 6. The fuel cell according to claim 5, wherein the first, second and third fuel gas paths and the first, second and third oxidant gas paths are substantially straight. 7. The fuel cell according to claim 5, wherein the fuel cell further comprises a flow resistance generation section between the first, second and third fuel gas inlet headers and the first, second and third fuel gas paths and/or between the first, second and third oxidant gas inlet headers and the first, second and third oxidant gas paths. 8. The fuel cell according to claim 5, wherein the heat medium inlet header is disposed at a lower stream than both a position of the fuel gas inlet header and a position of the oxidant gas inlet header and at a side direction of both a position of the fuel gas path and a position of the oxidant gas path, and the heat medium outlet header is disposed at an opposite side direction to the side direction. 9. The fuel cell according to any one of claim 1, claim 5, claim 4 or claim 8, wherein the oxidant gas heats the first, second and third fuel gas inlet headers to prevent condensation of water vapor contained in the fuel gas in normal operation, and the heat medium cools the first, second and third fuel gas paths such that condensation of water vapor contained in the fuel gas is occurred in the first and second fuel gas paths. 10. The fuel cell according to any one of claim 1, claim 5, claim 4 or claim 8, wherein a temperature of the oxidant gas to be supplied to the first, second and third oxidant gas inlet headers is set to be greater than or equal to a dew point of the fuel gas to be supplied to the first, second and third fuel gas inlet headers in normal operation, and a temperature of the fuel gas discharged from the first, second and third fuel gas outlet headers is under a dew point of the fuel gas discharged from the first, second and third fuel gas outlet headers. 11. The fuel cell according to any one of claim 1, claim 5, claim 4 or claim 8, wherein the fuel gas heats the first, second and third oxidant gas inlet headers to prevent condensation of water vapor contained in the oxidant gas in normal operation, and the heat medium cools the first, second and third oxidant gas paths such that condensation of water vapor contained in the oxidant gas is occurred in the first, second and third oxidant gas paths. 12. The fuel cell according to any one of claim 1, claim 5, claim 4 or claim 8, wherein temperature of the fuel gas to be supplied to the first, second and third oxidant gas inlet headers is set to be greater than or equal to a dew point of the oxidant gas to be supplied to the first, second and third oxidant gas inlet headers in normal operation, and a temperature of the oxidant gas discharged from the first, second and third oxidant gas outlet headers is under a dew point of the oxidant gas discharged from the first, second and third oxidant gas outlet headers.
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이 특허에 인용된 특허 (5)
Lee, James H., Coolant flow field design for fuel cell stacks.
Chow Clarence Y. (Vancouver CAX) Wozniczka Boguslav M. (Coquitlam CAX), Electrochemical fuel cell stack with humidification section located upstream from the electrochemically active section.
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