[특허]Solid polymer electrolyte fuel cell stack water management system

Solid polymer electrolyte fuel cell stack water management system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01M-008/04 H01M-002/00
출원번호	US-0121008 (1987-11-16)
발명자 / 주소	Reiser Carl A. (Glastonbury CT) Sawyer Richard D. (Canton CT)
출원인 / 주소	International Fuel Cells Corporation (South Windsor CT 02)
인용정보	피인용 횟수 : 119 인용 특허 : 0

초록 ▼

Water is fed into the fuel cell stack in the hydrogen reactant stream. Some of the water is evaporated in the cells to cool the stack, and some of the water migrates through the stack from cell to cell. The water migration is the result of the water being dragged from the anode to the cathode through the electrolyte membrane and by the use of porous hydrophilic separator plates being interposed between adjacent cells in the stack. Water is forced through these porous separator plates by means of a reactant pressure differential maintained between the cathode and anode. The anode support plates provide a large surface area from which water is evaporated to perform the cooling function.

대표청구항 ▼

A solid polymer fuel cell stack power assembly comprising: (a) a plurality of fuel cells stacked one atop another, each of said fuel cells comprising: (i) a solid polymr electrolyte membrane; (ii) means forming an anode on one face of said electrolyte membrane, and means forming a cathode of an opposite face of said electrolyte membrane; (iii) a porous anode flow field plate disposed adjacent to said anode, said anode flow field plate having a contoured surface facing said anode with a plurality of grooves forming a hydrogen reactant flow field, and a plurality of intervening projections disposed in contact with said anode; (iv) a porous cathode flow field plate disposed adjacent to said cathode, said cathode flow field plate having a contoured surface facing said cathode with a plurality of grooves forming an oxygen reactant flow field, and a plurality of intervening projections disposed in contact with said cathode; (b) with the exception of an initial cell in the stack, each of said cells in the stack having its anode flow field plate disposed back-to-back with the cathode flow field plate of an adjacent cell; (c) porous hydrophilic separator plates interposed between each of the back-to-back anode and cathode flow field plates; (d) means for admitting hydrogen into said hydrogen reactant flow fields; (e) means for entraining sufficient water in the hydrogen prior to entering the hydrogen reactant flow fields to sufficiently moisten said anode flow field plates to an extent that cooling of said fuel cells is accomplished by evaporation of water from said anode flow field plates, and sufficient unevaporated water will remain in said anode flow field plates to saturate the anode faces of the electrolyte membranes; (f) means for admitting oxygen reactant into said oxygen reactant flow fields; and (g) means for maintaining the oxygen reactant flow fields at an operating pressure which is sufficiently greater than the operating pressure of said hydrogen reactant flow fields to force water absorbed by said cathode flow field plates from said cathode faces of said electrolyte membranes to flow through said porous separator plates and into said anode flow field plates in adjacent cells.

이 특허를 인용한 특허 (119)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Solid polymer electrolyte fuel cell stack water management system 원문보기

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Solid polymer electrolyte fuel cell stack water management system 원문보기

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