| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell capable of improving a gas flow coming round to a portion directly under the projecting part of a diffusion layer, and capable of maintaining a gas flow velocity in the straight portion or the bent portion of a passage. <P>SOLUTION: (1) This fuel cell is equipped with a separator 18 having a plurality of projecting parts 29 in the gas passage, and a groove 31 is provided on the top face of the projecting part 29. (2) The groove 31 is set up so that a collecting part 30 made by dividing the top face of the projecting part by the groove in the intra-surface direction have a uniform area. (3) The depth of the groove 31 is not less than an amount of a diffusion layer crushed when the diffusion layer is pushed by the collecting part 30. (4) The groove 31 has a first groove 31a and a second groove 31b obliquely intersecting to it. (5) The groove 31 is tilted in a direction along gas flow flowing a bent portion in the bent portion of the gas passage. (6) The groove 31 comprises a portion having a low step which is provided in a long land, and the area of the collecting part in the long land is made almost equal to the area of the collecting part in a short land. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
