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Gas separator for a fuel cell, and fuel cell using the same gas separator for a fuel cell
| Details |
Inventors: Takahashi, Tsuyoshi; Goto, Sogo;
Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota, JP)
Primary Examiner: Huff; Mark F.
Assistant Examiner: Chacko-Davis; Daborah
Attorney, Agent or Firm: Kenyon & Kenyon
A fuel cell enhancing the utility rate of supplied gas includes a separator having a plurality of holes extending therethrough and a plurality of ribs communicating between mutually confronting holes. Oxidizing gas supplied into the fuel cell passes through a first oxidizing gas feed manifold formed by a first hole, is distributed into a first unit cell inside oxidizing gas passage formed by a first rib, and is merged in an oxidizing gas exhaust manifold formed by a second hole. This oxidizing gas is guided into a return plate disposed at the end of the fuel cell, is further led into a second oxidizing gas feed manifold, and is distributed into a second unit cell inside gas passage. The oxidizing gas sequentially passes through plural unit cell inside oxidizing gas passages. |
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DETAILED DESCRIPTION It is hence an object of the present invention to solve the above problems, and enhance the feed rate of gas supplied into a fuel cell, without lowering the energy efficiency of the entire system having the fuel cell.
A first aspect of the present invention relates to a separator for a fuel cell composing a fuel cell by laminating together with an electrolyte layer and an electrode forming member, and forming a gas passage inside of the fuel cell, comprising at least two holes penetrating through the separator in the thickness direction, and plural unit cell inside passage forming structures for communicating the two holes on one surface of the separator, having a concave section, in which the plural cell inside passage forming structures are formed so as not to communicate each other on the separator surface.
In the gas separator for a fuel cell according to this aspect, when composing the fuel cell by laminating this gas separator, by the two holes for composing the individual unit cell inside passage forming structures, gas passages (gas manifolds) for passing gas in the laminating direction of the gas separator are formed.
On one surface of the gas separator, moreover, gas passages (unit cell inside gas passages) for supplying gas to the electrolyte layer and electrode are formed in a concave section for communicating two holes.
At one surface of the gas separator, plural unit cell inside gas passages are formed independently so as not to communicate with each other, and when the gas supplied into the fuel cell is distributed into the gas passages formed on the gas separator surface, gas is not supplied at once from a single manifold on the entire surface of the specified gas separator.
That is, the gas is supplied from the individual gas manifolds, in each one of the unit cell inside gas passages formed by the unit cell inside passage forming structures provided by dividing the surface of the gas separator.
Another aspect of the invention relates to a fuel cell for obtaining an electromotive force by electrochemical reaction with a supply of reaction gas
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Nonmetallic Processes 
