Occidental Chemical Corporation (Niagara Falls NY 02)
인용정보
피인용 횟수 :
33인용 특허 :
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초록▼
The fuel cell is constituted by a plurality of elements disposed in electrical contact with one another, with each element comprising two porous electrodes, an electrolyte filling the gap situated between said electrodes, and two impermeable bipolar current collectors. One of the electrodes is fixed
The fuel cell is constituted by a plurality of elements disposed in electrical contact with one another, with each element comprising two porous electrodes, an electrolyte filling the gap situated between said electrodes, and two impermeable bipolar current collectors. One of the electrodes is fixed to a frame having a central orifice. One face of said frame includes grooves for conveying electrolyte from an inlet orifice to a manifold chamber which communicates with the electrolyte compartment, and further grooves for removing electrolyte therefrom to an outlet orifice. The electrolyte compartment is closed by another insulating frame to which the second electrode is fixed. In a preferred embodiment of the invention a separator is provided in the electrolyte compartment in the form of a grating constituted by insulating bars which are parallel to one another and to the direction of electrolyte flow, and constituting an integral part of one of the frames of the electrolyte compartment.
대표청구항▼
A fuel cell structure with improved separation constituted by a plurality of identical juxtaposed cells which are disposed in electrical contact with one another and which are fixed together in a predetermined cell sequence, the said cell structure including three distribution circuits which are com
A fuel cell structure with improved separation constituted by a plurality of identical juxtaposed cells which are disposed in electrical contact with one another and which are fixed together in a predetermined cell sequence, the said cell structure including three distribution circuits which are common to all of the cells, as follows: an electrolyte distribution circuit for distributing electrolyte from an external source and including a common inlet channel and a common outlet channel; a fuel distribution circuit for distributing fuel from an external source and including at least one fuel inlet channel and at least one outlet channel for removing unburnt fuel and inert gases from the cell structure; and an oxidant distribution circuit including a plurality of oxidant inlet and outlet orifices situated in the bottom and top faces of the cell structure; each cell additionally comprising: first and second porous planar electrodes with spaced apart parallel internal faces, one being a cathode and the other an anode, and each including a specific catalyst; an electrolyte filling the space between said electrodes; and an impermeable bipolar current collector comprising a single frame of plastic material and at least one central conductive zone within the frame having a cathode face and an anode face, with channels on each of its faces, the collector coming into electrical contact via the high points of its cathode face with the external surface of said cathode, and via its anode face with the external surface of the anode of an adjacent cell; the oxidizing gas from said oxidant distribution circuit flowing between said cathode and the cathode face of the collector and being supplied to said cathode, and the fuel gas from said fuel distribution circuit flowing between said anode and the anode face of the collector of the other adjacent cell and being supplied to said anode of the other adjacent cell; said collector frame being provided with orifices to allow the electrolyte and the fuel to flow through the cell structure, said orifices forming part of said common inlet and outlet electrolyte channels, said fuel inlet channel, and said unburnt fuel and inert gas outlet channel; said first electrode being surrounded by a first electrode frame made of plastic material and having a central orifice in the form of a quadrilateral, the top and bottom portions of the first electrode frame including orifices for conveying fuel and electrolyte through the cell structure, said orifices corresponding to the orifices provided in the frame of the collector and likewise forming part of said inlet and outlet channels for the fuel and the electrolyte, means being provided on one face of the first electrode frame to enable electrolyte to be conveyed from the inlet channel to an electrolyte compartment situated between the two electrodes, and from said compartment to an outlet channel, said means including grooves that open out into set back portions that constitute electrolyte distributing and collecting manifolds disposed on the top and bottom portions of the first electrode frame along two opposite sides of the central orifice and in communication with the electrolyte chamber by means of a plurality of parallel microchannels delimited by ribs, the second electrode being surrounded by a second electrode frame, said second electrode frame being made of an insulating plastic material, being of identical contour to the first electrode frame surrounding the first electrode, having fuel and electrolyte conveying orifices corresponding to those provided in said first electrode frame, and having a plane face applied against the face of the first electrode frame having the grooves and the electrolyte distributing and collecting manifolds, such that each cell is an assembly of only three frames, additional sets of three frames being fixed together in a predetermined cell sequence to constitute a repetitive stack of cells and to define said fuel distribution network, said oxidant distribution network, and said electrolyte distribution network, wherein the improvement comprises: said electrolyte compartment containing a separator constituted by a grating of insulating material forming an integral part of said first electrode frame, said grating comprising bars whose thickness is no greater than the inter-electrode spacing, the bars being parallel to each other and to the direction of electrolyte flow through the electrolyte from the common inlet channel to the common outlet channel.
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이 특허를 인용한 특허 (33)
Beutel,Matthew J.; Darga,Daniel J., Bipolar plate having offsets.
James M. D'Aleo ; Charles M. Carlstrom, Jr. ; Russel H. Marvin ; Michael M. Walsh ; Norman Peschke ; Gary D. Antonelli, Clamping system for a fuel cell stack.
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