In a fuel cell assembly (1) comprising a pair of separators (11, 12) each for defining a recess (10) serving as a conduit for a fuel fluid or an oxidizer fluid, a feedthrough conductive path for connecting top and under surfaces of each separator is achieved by a second electroconductive film (36) f
In a fuel cell assembly (1) comprising a pair of separators (11, 12) each for defining a recess (10) serving as a conduit for a fuel fluid or an oxidizer fluid, a feedthrough conductive path for connecting top and under surfaces of each separator is achieved by a second electroconductive film (36) formed on a side wall of a through-hole (33) extending through each separator (11, 12) in such a manner that the second electroconductive film (36) connects a first electroconductive film (35) constituting a top surface of a protrusion (30) provided in the recess (10) to a third electroconductive film (37) formed on a surface opposite to that formed with the recess (10).
대표청구항▼
The invention claimed is: 1. A fuel cell assembly, comprising: an electrolyte layer (13); a pair of catalyst electrode layers (15) interposing said electrolyte layer there between; and a pair of planar separators (11, 12) interposing said electrolyte layer and said catalyst electrode layers there b
The invention claimed is: 1. A fuel cell assembly, comprising: an electrolyte layer (13); a pair of catalyst electrode layers (15) interposing said electrolyte layer there between; and a pair of planar separators (11, 12) interposing said electrolyte layer and said catalyst electrode layers there between, wherein each said separator of said pair of separators comprises a first surface facing said electrolyte layer and a second surface opposite to said first surface, wherein said first surface comprises at least one recess (31) through which a fuel fluid or an oxidizer fluid flows so as to contact an associated one of said pair of catalyst electrode layers, wherein said separator further comprises at least one through hole (33) that extends from said first surface to said second surface of each said separator; a first electroconductive film (35) disposed across said at least one through hole, wherein said first electroconductive film electrically communicates with said catalyst electrode layer; a second electroconductive film (36) disposed on the walls of said at least one through hole; and a third electroconductive film (37) disposed on said second surface of each said separator, wherein said second electroconductive film electrically connects said first electroconductive film and said third electroconductive film to provide electrical continuity through said planar separator. 2. A fuel cell assembly according to claim 1, wherein at least one protrusion (30, 55, 56) is provided in said recess (31) of each of said pair of separators (11, 12) and wherein said first electroconductive film (35) constitutes at least part of a top surface of said protrusion. 3. A fuel cell assembly according to claim 1, wherein each separator (11, 12) is provided with a plurality of said recesses (31) so that a plurality of fuel cells are arranged on a common plane, and a plurality of said third electroconductive films (37) corresponding to said plurality of fuel cells are formed on said second surface of each separator, and wherein said fuel cell assembly further comprises one or more electrical connection members for contacting said third electroconductive films on said second surface of said pair of separators to thereby electrically connect said plurality of fuel cells. 4. A fuel cell assembly according to claim 2, wherein said through-hole (33) is formed in said protrusion (30, 55, 56). 5. A fuel cell assembly according to claim 1, wherein said through-hole (33) is provided in a bottom of said recess (31), and wherein at least part of said first electroconductive film (35) extends along said bottom of said recess to contact said second electroconductive film (36) formed on said side wall of said through-hole provided in said bottom of said recess. 6. A fuel cell assembly according to claim 1, further comprising an electroconductive diffusion layer between each of said separators (11, 12) and said associated catalyst electrode layer (15). 7. A fuel cell assembly according to claim 1, wherein etched features are provided in each of said pair of separators. 8. A fuel cell assembly according to claim 7, wherein said first to third electroconductive films (35, 36, 37) comprise a deposited metallic material disposed on said pair of separators, wherein said deposition is by either of physical vapor deposition (PVD), chemical vapor deposition (CVD), spin coating, sputtering or screen printing. 9. A fuel cell assembly according to claim 8, wherein said side wall of each through-hole (33) of said pair of separators (11, 12) is inclined so that each through-hole diverges from said first surface to said second surface of said pair of separators. 10. A fuel cell assembly according to claim 7, wherein said substrate is made of a semiconductor material, and an insulating layer is formed between said first electroconductive film (35) and said first surface of each separator (11, 12), between said second electroconductive film (36) and said side wall of said through-hole (33), and between said third electroconductive film (37) and said second surface of each separator.
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이 특허에 인용된 특허 (5)
Yang Jefferson Y. S. ; Rehg Timothy J., Fuel cell and bipolar plate for use with same.
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