FUEL CELL STACK

To provide a fuel cell stack capable of restraining deformation of a throttling channel.SOLUTION: A fuel cell stack 1 has a lamination structure 5 where a single cell 2 supported by a support medium 3 and a separator 4 are laminated alternately. The fuel cell stack 1 has a fuel gas passage 51, an ox...

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1. Verfasser: SUGIHARA SHINICHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a fuel cell stack capable of restraining deformation of a throttling channel.SOLUTION: A fuel cell stack 1 has a lamination structure 5 where a single cell 2 supported by a support medium 3 and a separator 4 are laminated alternately. The fuel cell stack 1 has a fuel gas passage 51, an oxidant gas passage 52, a throttling channel 6, and a deformation absorption part 7. The fuel gas passage 51 exists between the support medium 3 and the separator 4, and supplies fuel gas F to the anode 21. The oxidant gas passage 52 exists between the cathode 22 and the separator 4, and supplies oxidant gas A to the cathode 22. The throttling channel 6 is provided in at least one of the fuel gas passage 51 and the oxidant gas passage 52, and throttles gas flow. When viewing in the gas flow direction along the in-plane direction of the single cell 2, the deformation absorption part 7 is provided at a part of the support medium 3 between the single cell 2 and the throttling channel 6, and absorbs elongation deformation of the support medium 3 in the in-plane direction of the cell due to temperature rise incident to electricity generation.SELECTED DRAWING: Figure 9 【課題】絞り流路部の変形を抑制可能な燃料電池セルスタックを提供する。【解決手段】燃料電池セルスタック1は、支持体3により支持された単セル2とセパレータ4とが交互に積層された積層構造5を有する。燃料電池セルスタック1は、燃料ガス流路51と、酸化剤ガス流路52と、絞り流路部6と、変形吸収部7とを有する。燃料ガス流路51は、支持体3とセパレータ4との間にあり、アノード21に燃料ガスFを供給する。酸化剤ガス流路52は、カソード22とセパレータ4との間にあり、カソード22に酸化剤ガスAを供給する。絞り流路部6は、燃料ガス流路51及び酸化剤ガス流路52の少なくとも1つに設けられ、ガス流を絞る。変形吸収部7は、単セル2のセル面内方向に沿うガス流れ方向で見て単セル2と絞り流路部6との間にある支持体3の部分に設けられており、発電に伴う温度上昇による支持体3のセル面内方向の伸び変形を吸収する。【選択図】図9