公开(公告)号：WO1995016287A1

公开(公告)日：1995-06-15

申请号：PCT/CA1994000673

申请日：1994-12-09

Applicant: BALLARD POWER SYSTEMS INC.

Inventor： BALLARD POWER SYSTEMS INC. ,  WILKINSON, David, P. ,  LAMONT, Gordon, J. ,  VOSS, Henry, H. ,  SCHWAB, Clemens

IPC: H01M08/02

CPC classification number: H01M8/0228 ,  H01M8/0206 ,  H01M8/0213 ,  H01M8/026 ,  H01M8/0263 ,  H01M8/0267 ,  H01M8/0271 ,  H01M8/04074 ,  H01M8/241 ,  H01M2300/0082 ,  Y10T29/49108

Abstract: An embossed fluid flow field plate (100) for electrochemical cells comprises a compressible, electrically conductive sheet (101). The sheet has two oppositely facing major surfaces. At least one of the major surfaces (102) has an embossed surface which has a fluid inlet (116) formed therein. The embossed surface has at least one open-faced channel embossed therein extending from the fluid inlet for conducting pressurized fluid introduced at the fluid inlet. The compressible, electrically conductive sheet preferably comprises graphite foil.

Abstract translation: 用于电化学电池的压花流体流场板（100）包括可压缩的导电片（101）。 片材具有两个相对的主表面。 至少一个主表面（102）具有压花表面，其中形成有流体入口（116）。 压花表面具有从流体入口延伸的至少一个敞开的通道，该开口通道从流体入口延伸，用于导入在流体入口处引入的加压流体。 可压缩的导电片优选包括石墨箔。

公开(公告)号：WO2004010521A3

公开(公告)日：2004-01-29

申请号：PCT/CA2003/001031

申请日：2003-07-17

Applicant: BALLARD POWER SYSTEMS INC. ,  JOHNSON MATTHEY PUBLIC LIMITED COMPANY ,  YE, Siyu ,  BEATTIE, Paul ,  CAMPBELL, Stephen, A. ,  WILKINSON, David, P. ,  THEOBALD, Brian, Ronald, Charles ,  THOMPSETT, David

Inventor： YE, Siyu ,  BEATTIE, Paul ,  CAMPBELL, Stephen, A. ,  WILKINSON, David, P. ,  THEOBALD, Brian, Ronald, Charles ,  THOMPSETT, David

IPC: H01M4/90

Abstract: In a solid polymer fuel cell series, various circumstances can result in a fuel cell (1) being driven into voltage reversal. For instance, cell voltage reversal can occur if that cell receives an inadequate supply of fuel. In order to pass current, reactions other than fuel oxidation may take place at the fuel cell anode, including water electrolysis and oxidation of anode (2) components. The latter may result in significant degradation of the anode, particularly if the anode employs a carbon black supported catalyst. Such fuel cells can be made substantially more tolerant to cell reversal by using certain anodes employing both a higher catalyst loading or coverage on a corrosion-resistant support and by incorporating, in addition to the typical electrocatalyst for promoting fuel oxidation, certain unsupported catalyst compositions to promote the water electrolysis reaction.

公开(公告)号：WO1992013365A1

公开(公告)日：1992-08-06

申请号：PCT/CA1992000017

申请日：1992-01-15

Applicant: BALLARD POWER SYSTEMS INC.

Inventor： BALLARD POWER SYSTEMS INC. ,  VOSS, Henry, H. ,  WILKINSON, David, P. ,  WATKINS, David, S.

IPC: H01M08/04

CPC classification number: H01M8/04029 ,  H01M8/04097 ,  H01M8/04156 ,  H01M8/04231 ,  H01M8/04291 ,  H01M8/1007 ,  H01M2300/0082

Abstract: A method and apparatus is provided for removing water accumulated at the cathode (22) of an electrochemical fuel cell incorporating a solid polymer ion exchange membrane (12). Liquid water accumulated at the cathode can be removed by maintaining a partial pressure of water vapor in the hydrogen-containing gas supply below the saturation pressure of water vapor therein such that water accumulated at the cathode is drawn by a concentration gradient toward the anode (20) across the membrane and is absorbed as water vapor into the hydrogen-containing gas supply between the inlet and the outlet. In one embodiment, the partial pressure of water vapor in the hydrogen-containing gas supply is maintained below the saturation pressure of water vapor therein by imparting a pressure drop between the inlet and the outlet sufficient to draw water accumulated at the cathode toward the anode. In another embodiment, the partial pressure of water vapor at the inlet of the hydrogen-containing gas supply is maintained at less than the saturation pressure of water vapor therein. Liquid water accumulated at the cathode can also be removed by maintaining a partial pressure of water vapor in the oxygen-containing gas supply below the saturation pressure of water vapor therein such that water accumulated at the cathode is drawn by a concentration gradient and is absorbed as water vapor into the oxygen-containing gas supply between the inlet and the outlet. Liquid water accumulated at the cathode can also be removed by absorbing water vapor into both the hydrogen-containing gas supply and the oxygen-containing gas supply.

公开(公告)号：WO2004091018A2

公开(公告)日：2004-10-21

申请号：PCT/CA2004/000504

申请日：2004-04-02

Applicant: BALLARD POWER SYSTEMS INC. ,  KNIGHTS, Shanna, D. ,  WILKINSON, David, P.

Inventor： KNIGHTS, Shanna, D. ,  WILKINSON, David, P.

IPC: H01M4/86

CPC classification number: H01M4/926 ,  H01M4/8605 ,  H01M4/92 ,  H01M8/1007

Abstract: A solid polymer electrolyte fuel cell stack having a plurality of fuel cells, wherein at least one cell of the fuel cell stack has a resistance to corrosion that is greater than a significant portion of the other fuel cells of the stack. In one embodiment, the at least one fuel cell of the fuel cell stack that is more resistant to corrosion is one or both end cells of the stack. Also disclosed is a fuel cell system containing such a stack, as well as methods for reducing degradation of the same during operation.

Abstract translation: 一种具有多个燃料电池的固体聚合物电解质燃料电池堆，其中所述燃料电池堆的至少一个电池具有大于所述电池堆的其它燃料电池的相当大部分的腐蚀性。 在一个实施例中，燃料电池堆的至少一个更耐腐蚀的燃料电池是电池堆的一个或两个端电池。 还公开了包含这种堆的燃料电池系统，以及用于在运行期间降低其劣化的方法。

公开(公告)号：WO1995017772A1

公开(公告)日：1995-06-29

申请号：PCT/CA1994000675

申请日：1994-12-07

Applicant: BALLARD POWER SYSTEMS INC.

Inventor： BALLARD POWER SYSTEMS INC. ,  FLETCHER, Nicholas, J. ,  LAMONT, Gordon, J. ,  BASURA, Vesna ,  VOSS, Henry, H. ,  WILKINSON, David, P.

IPC: H01M08/04

CPC classification number: H01M8/0267 ,  H01M8/02 ,  H01M8/0247 ,  H01M8/04014 ,  H01M8/241 ,  H01M8/2465 ,  H01M8/247 ,  H01M8/249 ,  H01M2300/0082

Abstract: An electrochemical fuel cell assembly includes a membrane electrode assembly which comprises an anode, a cathode having a surface thereof exposed to ambient air, and an ion exchange membrane interposed between the anode and the cathode. A seal forms a gas-impermeable barrier around the anode to which a gaseous fuel stream is supplied. The assembly further includes a thermally conductive plate having a plurality of thermally conductive members of fins extending from a major surface of the plate. The thermally conductive members contact portions of the exposed cathode surface. Adjacent thermally conductive members cooperate with the plate and the exposed cathode surface to form air conducting channels. Heat generated exothermically in the membrane electrode assembly is dissipated to the atmosphere through the thermally conductive members.

Abstract translation: 电化学燃料电池组件包括膜电极组件，其包括阳极，其表面暴露于环境空气的阴极以及置于阳极和阴极之间的离子交换膜。 密封件在供给气态燃料流的阳极周围形成气体不可渗透的屏障。 该组件还包括导热板，该导热板具有从该板的主表面延伸的翅片的多个导热构件。 导热构件接触暴露的阴极表面的部分。 相邻的导热构件与板和暴露的阴极表面配合以形成导气通道。 在膜电极组件中放热产生的热量通过导热部件散发到大气中。

公开(公告)号：WO1995008851A1

公开(公告)日：1995-03-30

申请号：PCT/CA1994000499

申请日：1994-09-14

Applicant: BALLARD POWER SYSTEMS INC.

Inventor： BALLARD POWER SYSTEMS INC. ,  WILKINSON, David, P. ,  VOSS, Henry, H. ,  DUDLEY, James ,  LAMONT, Gordon, J. ,  BASURA, Vesna

IPC: H01M08/06

CPC classification number: H01M8/0263 ,  C01B3/583 ,  C01B2203/044 ,  C01B2203/047 ,  C10K3/04 ,  H01M8/0247 ,  H01M8/025 ,  H01M8/0258 ,  H01M8/0612 ,  H01M8/0625 ,  H01M8/0662 ,  H01M8/241 ,  H01M8/2483 ,  H01M2300/0082

Abstract: A method and apparatus oxidizes the carbon monoxide present in an incoming reactant fuel stream and/or carbon monoxide produced by the reverse water-shift reaction to carbon dioxide in a reactant stream introduced to an electrochemical fuel cell. The reactant stream comprises hydrogen, carbon dioxide and carbon monoxide. A first oxygen-containing gas stream is introduced into the reactant stream through a first port disposed between the reactant stream inlet (214) and the reactant stream outlet (218). A further oxygen-containing gas stream is introduced into the reactant stream through at least one secondary port (234) located between the first port and the reactant stream outlet (218).

Abstract translation: 一种方法和装置将进入的反应物燃料流中存在的一氧化碳和/或通过反向水分转换反应产生的一氧化碳氧化成引入电化学燃料电池的反应物流中的二氧化碳。 反应物流包括氢气，二氧化碳和一氧化碳。 通过设置在反应物流入口（214）和反应物流出口（218）之间的第一端口将第一含氧气流引入反应物流中。 通过位于第一端口和反应物流出口（218）之间的至少一个次级端口（234）将另外的含氧气体流引入反应物流中。

公开(公告)号：WO1995008850A1

公开(公告)日：1995-03-30

申请号：PCT/CA1994000498

申请日：1994-09-14

Applicant: BALLARD POWER SYSTEMS INC.

Inventor： BALLARD POWER SYSTEMS INC. ,  WILKINSON, David, P. ,  VOSS, Henry, H. ,  DUDLEY, James ,  LAMONT, Gordon, J. ,  BASURA, Vesna

IPC: H01M08/06

CPC classification number: H01M8/0263 ,  C01B3/583 ,  C01B2203/044 ,  C01B2203/047 ,  C10K3/04 ,  H01M8/0228 ,  H01M8/0245 ,  H01M8/025 ,  H01M8/0252 ,  H01M8/0258 ,  H01M8/0265 ,  H01M8/0612 ,  H01M8/0625 ,  H01M8/0662 ,  H01M8/241 ,  H01M8/2483 ,  H01M2300/0082

Abstract: A method and apparatus (212) selectively oxidizes, within the fuel cell assembly (210), the carbon monoxide present in a fuel stream (222) fed to the assembly. A quantity of catalyst is contained within at least a portion of a fuel stream passageway within the stack. The carbon monoxide is selectively oxidized by the catalyst to carbon dioxide, and carbon monoxide produced by the reverse water-shift reaction is also oxidized.

Abstract translation: 方法和装置（212）在燃料电池组件（210）内选择性地氧化存在于馈送到组件的燃料流（222）中的一氧化碳。 一定数量的催化剂被包含在堆叠内的燃料流通道的至少一部分内。 一氧化碳被催化剂选择性氧化成二氧化碳，通过反向水分转化反应产生的一氧化碳也被氧化。

公开(公告)号：WO1994011912A1

公开(公告)日：1994-05-26

申请号：PCT/CA1993000486

申请日：1993-11-12

Applicant: BALLARD POWER SYSTEMS INC.

Inventor： BALLARD POWER SYSTEMS INC. ,  WILKINSON, David, P. ,  VOSS, Henry, H. ,  PRATER, Keith, B.

IPC: H01M08/02

CPC classification number: H01M8/0213 ,  H01M8/0228 ,  H01M8/0234 ,  H01M8/0263 ,  H01M8/0265 ,  H01M8/04074 ,  H01M2300/0082

Abstract: Fluid flow field plates (180) for electrochemical fuel cells incorporate discontinuous fluid flow channels. The plates are formed from an electrically conductive, fluid impermeable material having a major surface in which at least one inlet channel (186) extends from a pressurized fluid reactant inlet (182). At least one outlet channel (192) extends from a fluid reactant outlet (188) formed in the major surface. Each inlet channel is discontinuous with respect to each outlet channel. The pressurized fluid reactant is urged through the interstices of the adjacent porous electrode material between each inlet channel and each outlet channel. The discontinuous flow field channels can also be formed in the surface of the electrode, in which case the flow field plates are replaced with thinner, electrically conductive, fluid impermeable separator plates.

Abstract translation: 用于电化学燃料电池的流体流场板（180）包含不连续的流体流动通道。 板由具有主表面的导电流体不可渗透材料形成，其中至少一个入口通道（186）从加压流体反应物入口（182）延伸。 至少一个出口通道（192）从形成在主表面中的流体反应物出口（188）延伸。 每个入口通道相对于每个出口通道是不连续的。 加压流体反应物通过每个入口通道和每个出口通道之间的相邻多孔电极材料的间隙被推动。 不连续的流场通道也可以形成在电极的表面中，在这种情况下，流场板被更薄的，导电的流体不可渗透的隔板替代。