A first seal member 50 is integrated with the surface 18a of a first metal separator 18, and is provided with a body base portion 58 having a trapezoidal-shaped cross-section and two protruded portions 60a and 60b integrated to the leading end of the body base portion 58, where said body base portio
A first seal member 50 is integrated with the surface 18a of a first metal separator 18, and is provided with a body base portion 58 having a trapezoidal-shaped cross-section and two protruded portions 60a and 60b integrated to the leading end of the body base portion 58, where said body base portion 58 is set to a height H1 for keeping a desired spring constant necessary for impact absorptions, and the protruded portions 60a and 60b are set to a height H2 for preventing the line pressure of the seal member from being abruptly changed and for keeping the strengths of the protruded portions 60a and 60b themselves.
대표청구항▼
What is claimed is: 1. A fuel cell comprising: an electrolyte/electrode structure having an electrolyte being arranged between a pair of electrodes, and a plurality of metal separators being stacked on said electrolyte/electrode structure, each of said plurality of separators including reaction gas
What is claimed is: 1. A fuel cell comprising: an electrolyte/electrode structure having an electrolyte being arranged between a pair of electrodes, and a plurality of metal separators being stacked on said electrolyte/electrode structure, each of said plurality of separators including reaction gas passages formed on one side thereof for feeding a reaction gas in the surface direction of said electrodes, said reaction gas passages being communicated with communication holes including at least a reaction gas introducing communication hole and a reaction gas discharging communication hole extending in the stacking direction, wherein said separators are integrated with seal members so as to cover at least surroundings of said electrodes and said communication holes; wherein one of said seal members includes a body base portion having a single trapezoidal-shaped cross-section and a plurality of protruded portions integrated with a leading end of said body base portion, said protruded portions including upper ends and a lower end where a height between the lower end and one of the upper ends is equal to a height between the lower end and another one of the upper ends, said trapezoidal-shaped cross-section of said body base portion rising to a height to contact the lower end of said pair of said protruded portions, said leading end of said trapezoidal-shaped cross-section of said body base portion integrating smoothly with one of said protruded portions; wherein said plurality of protruded portions form greater contact area between said one seal member and a sealing surface; and wherein said body base portion is connected to said plurality of protruded portions by a curved portion, the curved portion has a radius of curvature in a range of 0.3 mm to 1.0 mm to prevent stress concentration during sealing. 2. A fuel cell comprising: an electrolyte/electrode structure having an electrolyte being arranged between a pair of electrodes, and a plurality of metal separators being stacked on said electrolyte/electrode structure, each of said plurality of separators including coolant passages formed on one side thereof for feeding a coolant in the surface direction of said electrodes, said coolant passages being communicated with communication holes including at least a coolant introducing communication hole and a coolant discharging communication hole extending in the stacking direction, wherein said separators are integrated with seal members so as to cover at least surroundings of said electrodes and said communication holes; wherein one of said seal members includes a body base portion having a trapezoidal-shaped cross-section and a plurality of protruded portions integrated with a leading end of said body base portion, said protruded portions including upper ends and a lower end, said trapezoidal-shaped cross-section of said body base portion rising to a height to contact the lower end of said pair of said protruded portions, said leading end of said trapezoidal-shaped cross-section of said body base portion integrating smoothly with one of said protruded portions; wherein said plurality of protruded portions form greater contact area between said one seal member and a sealing surface; and wherein said body base portion is connected to said plurality of protruded portions by a curved portion, the curved portion has a radius of curvature in a range of 0.3 mm to 1.0 mm to prevent stress concentration during sealing. 3. A fuel cell comprising: an electrolyte/electrode structure having an electrolyte being arranged between a pair of electrodes, and a plurality of metal separators being stacked on said electrolyte/electrode structure, each of said plurality of separators including reaction gas passages formed on one side thereof for feeding a reaction gas in the surface direction of said electrodes and coolant passages formed on the other side thereof for feeding a coolant in the surface direction of said electrodes, said reaction gas passages being communicated with communication holes including at least a reaction gas introducing communication hole and a reaction gas discharging communication hole extending in the stacking direction, and said coolant passages being communicated with communication holes including at least a coolant introducing communication hole and a coolant discharging communication hole extending in the stacking direction wherein said separators having seal members thereon so as to cover at least surroundings of said electrodes and said communication holes said separators being a different material than said seal members, the seal members being made of a deformable material; wherein one of said seal members includes a body base portion having a trapezoidal-shaped cross-section and a plurality of protruded portions having arcuate leading end portions with a predetermined curvature, the curvature being integrated with leading ends of said body base portion, said protruded portions being made of a material more deformable than that of said body base portion, said protruded portions including upper ends and a lower end, said trapezoidal-shaped cross-section of said body base portion rising to a height to contact the lower end of said pair of said protruded portions, said leading ends of said trapezoidal-shaped cross-section of said body base portion integrating smoothly with said protruded portions; wherein said plurality of protruded portions form greater contact area between said one seal member and a sealing surface; and wherein said body base portion is connected to said plurality of protruded portions by a curved portion, the curved portion has a radius of curvature in a range of 0.3 mm to 1.0 mm to prevent stress concentration during sealing. 4. A fuel cell according to claim 1, wherein said separators are made of wave-shape metal plates. 5. A fuel cell according to claim 3, wherein said arcuate leading end portions are provided with a plurality of protruded portions. 6. A fuel cell comprising: an electrolyte/electrode structure having an electrolyte being arranged between a pair of electrodes; a plurality of metal separators being stacked on said electrolyte/electrode structure, each of said plurality of separators including reaction gas passages formed on one side thereof for feeding a reaction gas in the surface direction of said electrodes, and seal members which seal the separators, wherein one of said seal members includes a body base portion having a trapezoidal-shaped cross-section and a plurality of protruded portions integrated with a leading end of said body base portion, said protruded portions including upper ends and a lower end, said trapezoidal-shaped cross-section of said body base portion rising above said base to a height to contact the lower end of said pair of said protruded portions, said leading end of said trapezoidal-shaped cross-section of said body base portion integrating smoothly with one of said protruded portions; wherein said plurality of protruded portions form greater contact area between said one seal member and a sealing surface; and wherein said body base portion is connected to said plurality of protruded portions by a curved portion, the curved portion has a radius of curvature in a range of 0.3 mm to 1.0 mm to prevent stress concentration during sealing. 7. A fuel cell according to claim 6, wherein said seal members are integrated to said separators. 8. A fuel cell according to claim 6, wherein said separators are made of wave-shaped metal plate. 9. The fuel cell according to claim 1, wherein said body base portion and said protruded portions are deformable such that said protruded portions being made of a material more deformable than that of said body base portion. 10. The fuel cell according to claim 2, wherein said body base portion and said protruded portions are deformable such that said protruded portions being made of a material more deformable than that of said body base portion. 11. The fuel cell according to claim 6, wherein said body base portion and said protruded portions are deformable such that said protruded portions being made of a material more deformable than that of said body base portion.
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이 특허에 인용된 특허 (6)
Nagai,Osamu; Wakamatsu,Shigeo; Kuroki,Yuichi, Gasket for fuel cell and method of forming it.
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