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    SHUTDOWN METHOD OF FUEL CELL STACK AND FUEL CELL SYSTEM THEREFOR
    4.
    发明申请
    SHUTDOWN METHOD OF FUEL CELL STACK AND FUEL CELL SYSTEM THEREFOR 审中-公开
    燃料电池堆和燃料电池系统的关闭方法

    公开(公告)号：US20160372767A1

    公开(公告)日：2016-12-22

    申请号：US14742785

    申请日：2015-06-18

    Applicant: GM Global Technology Operations LLC ,  Honda Motor Co., Ltd.

    Inventor： Manish Sinha ,  Michael Cartwright ,  Pinkhas A. Rapaport ,  Asao Uenodai

    IPC: H01M8/04

    Abstract: A fuel cell stack, a method of operating a fuel cell stack and a fuel cell system. In one particular form, shutting down the stack upon detection of a leakage of fuel either within the stack or from the stack involves depressurizing and uniform consumption of hydrogen by catalytic consumption in the cathode of all cells. Upon consumption of oxygen in the cathode portion of the stack by chemical reaction, the remaining unreacted nitrogen from the air acts as an inerting fluid. After an indication of reaction cessation is established, at least some of the inerting fluid is conveyed from the cathode portion to the anode portion. One or more of a bleed valve, backpressure valve and bypass valve are manipulated to promote the anode portion depressurization, cathode portion inerting and subsequent conveyance of the inerting fluid to the stack anode portion.

    Abstract translation: 燃料电池堆，操作燃料电池堆的方法和燃料电池系统。 在一种特定形式中，在检测到堆叠或堆叠内的燃料泄漏的情况下关闭堆叠包括通过所有电池的阴极中的催化消耗来降低氢气并使其均匀消耗。 当通过化学反应在堆叠的阴极部分中消耗氧时，来自空气的剩余的未反应的氮作为惰性流体。 在建立反应停止的指示之后，至少一些惰性流体从阴极部分输送到阳极部分。 操纵排气阀，背压阀和旁通阀中的一个或多个以促进阳极部分减压，阴极部分惰化和随后将惰性流体输送到堆叠阳极部分。

    FUEL CELL STACK WITH IMPROVED END CELL PERFORMANCE THROUGH A DIFFUSION MEDIA HAVING LOWER COMPRESSIBILITY
    7.
    发明申请
    FUEL CELL STACK WITH IMPROVED END CELL PERFORMANCE THROUGH A DIFFUSION MEDIA HAVING LOWER COMPRESSIBILITY 有权
    通过具有较低可靠性的扩散介质改善终端电池性能的燃料电池堆叠

    公开(公告)号：US20140051005A1

    公开(公告)日：2014-02-20

    申请号：US14062729

    申请日：2013-10-24

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  Po-Ya Abel Chuang ,  Wenbin Gu

    IPC: H01M8/04

    CPC classification number: H01M8/04201 ,  H01M8/023

    Abstract: A fuel cell stack that includes a gas diffusion media for the end cells in the stack that has less of an intrusion into the flow field channels of the end cells that the other cells, so as to increase the flow rate through the flow channels in the end cells relative to the flow rate through the flow channels in the other cells. A different diffusion media can be used in the end cells than the nominal cells, where the end cell diffusion media has less of a channel intrusion as a result of diffusion media characteristics. Also, the same diffusion media could be used in the end cells as the nominal cells, but the end cell diffusion media layers could be thinner than the nominal cell diffusion media layers. Further, a higher amount of pre-compression can be used for the diffusion media in the end cells.

    Abstract translation: 一种燃料电池堆，其包括用于堆叠中的末端电池的气体扩散介质，其具有较少侵入到其他电池的端电池的流场通道，以便增加通过其中的流动通道的流速 相对于通过其他电池中的流动通道的流速来说，终端电池。 在末端电池中可以使用不同的扩散介质，而不是标称电池，其中末端电池扩散介质由于扩散介质特性而具有较少的通道入侵。 此外，相同的扩散介质可以在末端电池中用作标称电池，但是终端电池扩散介质层可以比标称电池扩散介质层更薄。 此外，更高量的预压缩可以用于端电池中的扩散介质。

    SYSTEM AND METHOD FOR MEA CONDITIONING IN A FUEL CELL
    8.
    发明申请
    SYSTEM AND METHOD FOR MEA CONDITIONING IN A FUEL CELL 审中-公开

    公开(公告)号：US20190190040A1

    公开(公告)日：2019-06-20

    申请号：US15846777

    申请日：2017-12-19

    Applicant: GM Global Technology Operations LLC

    Inventor： Swaminatha P. Kumaraguru ,  Jingxin Zhang ,  Nagappan Ramaswamy ,  Pinkhas A. Rapaport

    IPC: H01M8/04828 ,  H01M8/04119 ,  H01M8/04537 ,  H01M8/1004

    Abstract: A controller-executed method for conditioning a membrane electrode assembly (MEA) in a fuel cell for use in a fuel cell stack includes humidifying a fuel inlet to the stack to a threshold relative humidity level, and maintaining a current density and cell voltage of the fuel cell at a calibrated current density level and hold voltage level, respectively, via the controller in at least one voltage recovery stage. The recovery stage has a predetermined voltage recovery duration. The method includes measuring the cell voltage after completing the predetermined voltage recovery duration, and executing a control action with respect to the fuel cell or fuel cell stack responsive to the measured cell voltage exceeding a target voltage, including recording a diagnostic code via the controller indicative of successful conditioning of the MEA. A fuel cell system includes the fuel cell stack and controller.

    Fuel cell stack with improved end cell performance provided by higher modulus of elasticity
    9.
    发明授权
    Fuel cell stack with improved end cell performance provided by higher modulus of elasticity 有权

    公开(公告)号：US09853307B2

    公开(公告)日：2017-12-26

    申请号：US14062628

    申请日：2013-10-24

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  Po-Ya Abel Chuang ,  Wenbin Gu

    IPC: H01M8/04082 ,  H01M8/023

    CPC classification number: H01M8/04201 ,  H01M8/023

    Abstract: A fuel cell stack that includes a gas diffusion media for the end cells in the stack that has less of an intrusion into the flow field channels of the end cells that the other cells, so as to increase the flow rate through the flow channels in the end cells relative to the flow rate through the flow channels in the other cells. A different diffusion media can be used in the end cells than the nominal cells, where the end cell diffusion media has less of a channel intrusion as a result of diffusion media characteristics. Also, the same diffusion media could be used in the end cells as the nominal cells, but the end cell diffusion media layers could be thinner than the nominal cell diffusion media layers. Further, a higher amount of pre-compression can be used for the diffusion media in the end cells.

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