摘要:
A fuel cell stack is disclosed, so as to prevent the corrosion of the power output terminal plate due to coolant and the occurrence of electric short circuits through the coolant, and to improve the flexibility of selection of the coolant. The fuel cell stack has unit fuel cells, each comprising an anode, a cathode, and an electrolyte which is placed between the anode and the cathode, wherein the unit fuel cells are stacked via separators. A pair of power output terminal plates are provided, one attached to each end face of the stacked unit fuel cells. A coolant supply and drainage passage and a gas supply and exhaust passage are formed through the stacked unit fuel cells and the power output terminal plates in the stacking direction, and the edge of each passage through the power output terminal plates is covered with a grommet having an insulating capability.
摘要:
A fuel cell that is small and light has separators having communication ports for reaction gases and cooling medium that are provided on an outer side of gas sealing members so as to penetrate each of the separators, and communication paths that detour around the gas sealing members in the thickness direction of the separators and connect the reaction gas communication ports with reaction gas flow passages. Furthermore, support members are provided to support the portions of the separators at which the gas sealing members and the cooling surface sealing member are disposed so as to be offset with respect to each other as viewed in the stacking direction.
摘要:
A fuel cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. A first cell voltage terminal for detecting a voltage generated in the membrane electrode assembly is formed integrally with an outer region of the first metal separator. The first cell voltage terminal extends outwardly from the first metal separator. A first seal member covers the outer region of the first metal separator, and includes a first extension seal which covers the first cell voltage terminal to a position near a tip end of the first cell voltage terminal.
摘要:
A fuel cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. A first cell voltage terminal for detecting a voltage generated in the membrane electrode assembly is formed integrally with an outer region of the first metal separator. The first cell voltage terminal extends outwardly from the first metal separator. A first seal member covers the outer region of the first metal separator, and includes a first extension seal which covers the first cell voltage terminal to a position near a tip end of the first cell voltage terminal.
摘要:
A power generation cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. Ridge members are formed integrally on the second metal separator, and these ridge members contact a first seal member of the first metal separator under pressure to form an inlet connection channel and an outlet connection channel. The coolant supply passage and the coolant flow field are connected through the inlet connection channel and the coolant discharge passage and the coolant flow field are connected through the outlet connection channel.
摘要:
A power generation cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. Ridge members are formed integrally on the second metal separator, and these ridge members contact a first seal member of the first metal separator under pressure to form an inlet connection channel and an outlet connection channel. The coolant supply passage and the coolant flow field are connected through the inlet connection channel and the coolant discharge passage and the coolant flow field are connected through the outlet connection channel.
摘要:
A fuel cell stack capable of giving improved impact resistance and vibration resistance without causing the space occupied by the fuel cell stack to be increased. In a fuel cell stack for mounting in a vehicle in which a plurality of fuel cell units, each of which is formed by interposing a solid polymer electrolyte membrane between an anode electrode and a cathode electrode, are stacked in a horizontal direction with separators placed between each, mounting members used for installation are provided at backup plates that are outside fastening structure portions that are provided at both ends along the direction in which the fuel cell units are stacked, and an intermediate supporting member used for installation is additionally provided at an intermediate portion along the direction in which the fuel cell units are stacked.
摘要:
A fuel cell is formed by sandwiching a membrane electrode assembly between a first separator and a second separator. A fuel gas flow field is formed in the second separator. An inlet buffer is connected to the inlet of the fuel gas flow field, and an outlet buffer is connected to an outlet of the fuel gas flow field. The inlet buffer is deeper than the outlet buffer. Therefore, the pressure loss in the inlet buffer is smaller than the pressure loss in the outlet buffer.
摘要:
A fuel cell stack comprising a second metal separator set to have an external dimension larger than a first metal separator, wherein the second metal separator comprises, formed integrally, a first seal member in contact with the peripheral edge of a first electrolyte membrane/electrode structure, a second seal member in contact with the peripheral edge of the first metal separator, and a third seal member in contact with the peripheral edge of an adjoining fourth metal separator. Since the first seal member, the second seal member and the third seal member are integrally formed on one surface of the second separator or one surface of the first separator, a seal-forming step can be carried out at one effort, simply and economically. In addition, use of a triple seal structure containing the first through the third seal members can favorably improve the sealing feature of reaction gas and minimize reaction gas leakage.
摘要:
A fuel cell stack includes a stack body formed by stacking a plurality of power generation cells in a stacking direction. At opposite ends of the stack body in the stacking direction, end power generation cells are provided. An end coolant flow field is formed on a separator of the end power generation cell. The flow rate of the coolant in the end coolant flow field is smaller than the flow rate of the coolant in a coolant flow field in each of the power generation cells. Specifically, the number of flow grooves of the end coolant flow field is smaller than the number of flow grooves of the coolant flow field.