DIAGNOSTIC TO DETERMINE A VALVE/LINE FREEZE-UP OR FAILURE IN A FUEL CELL BLEED MANIFOLD UNIT
    21.
    发明申请
    DIAGNOSTIC TO DETERMINE A VALVE/LINE FREEZE-UP OR FAILURE IN A FUEL CELL BLEED MANIFOLD UNIT 有权
    确定燃料电池单元的阀门/线路冷冻或故障的诊断

    公开(公告)号:US20100112383A1

    公开(公告)日:2010-05-06

    申请号:US12262825

    申请日:2008-10-31

    IPC分类号: H01M8/04

    摘要: A system and method for determining whether valves in a fuel cell system bleed manifold unit (BMU) are blocked with ice or have otherwise failed. The system opens a first bleed valve, closes a second bleed valve and opens an exhaust valve, and then reads a pressure signal to determine whether there is flow through a flow restriction to determine whether the first bleed valve or the exhaust valve is blocked. The system then closes the exhaust valve, leaves the first bleed valve open, and again reads the pressure signal to determine the pressure drop across the flow restriction, which will indicate whether the flow restriction the pressure sensor lines are blocked. The system then closes the first bleed valve and opens the second bleed valve to determine whether the pressure signal indicates a flow through the second bleed valve.

    摘要翻译: 用于确定燃料电池系统中的阀是否泄放歧管单元(BMU)的系统和方法是否被冰阻挡或者否则失效。 该系统打开第一泄放阀,关闭第二泄放阀并打开排气阀,然后读取压力信号以确定是否流过流量限制以确定第一泄放阀或排气阀是否被阻塞。 然后系统关闭排气阀,使第一泄放阀打开,并再次读取压力信号,以确定跨流量限制的压降,这将指示流量限制压力传感器线是否被阻塞。 然后,系统关闭第一放气阀并打开第二排气阀,以确定压力信号是否指示通过第二排放阀的流量。

    Cathode transient humidity control in a fuel cell system
    22.
    发明授权
    Cathode transient humidity control in a fuel cell system 有权
    燃料电池系统中阴极瞬态湿度控制

    公开(公告)号:US07514171B2

    公开(公告)日:2009-04-07

    申请号:US11450565

    申请日:2006-06-09

    IPC分类号: H01M8/04

    摘要: A fuel cell system that selectively causes cathode input air to by-pass a water vapor transfer (WVT) device during high to low power transients. During normal stack operation, the cathode input air is sent through the WVT device to humidify the cathode input air for proper membrane humidification. For low power stack operation, where the cathode input airflow is reduced, which reduces the ability of the airflow to drive water out of the cathode flow channels, a by-pass valve is switched so the cathode inlet air by-passes the WVT device to reduce the cathode inlet humidification. In one embodiment, heaters at the ends of the stack are turned on during the low power condition to further reduce the accumulation of water in the end channels of the stack.

    摘要翻译: 一种燃料电池系统,其在高电压至低功率瞬变期间选择性地使阴极输入空气绕过水蒸汽转移(WVT)装置。 在正常堆叠操作期间,阴极输入空气通过WVT装置发送,以加湿阴极输入空气以进行适当的膜加湿。 对于低功率堆叠操作,其中阴极输入气流减小,这降低了气流将水驱出阴极流动通道的能力,切换旁通阀,使得阴极入口空气绕过WVT装置 减少阴极入口加湿。 在一个实施例中,在低功率条件期间,堆叠端部处的加热器导通,以进一步减少水堆在堆叠的最终通道中的积聚。

    CONTROL METHOD FOR COLD FUEL CELL SYSTEM OPERATION
    23.
    发明申请
    CONTROL METHOD FOR COLD FUEL CELL SYSTEM OPERATION 有权
    冷燃料电池系统运行控制方法

    公开(公告)号:US20090017340A1

    公开(公告)日:2009-01-15

    申请号:US11774738

    申请日:2007-07-09

    IPC分类号: H01M8/04

    摘要: A method of operating a fuel cell system comprising a fuel cell and a compressor that provides air to the fuel cell. The method comprises sensing a temperature indicative of the temperature of a fuel cell, providing a restriction in an air flow path to the fuel cell when the sensed temperature is below a threshold, and increasing the speed of the compressor to provide a desired air flow to the fuel cell. In at least some implementations, increasing the speed of the compressor increases the power drawn from the fuel cell to power the compressor and helps to increase the heat of the fuel cell. The increased speed of the compressor can also result in warmer air flow from the compressor that can further increase the temperature of the system components.

    摘要翻译: 一种操作燃料电池系统的方法,其包括向燃料电池提供空气的燃料电池和压缩机。 该方法包括感测指示燃料电池的温度的温度,当检测到的温度低于阈值时,提供对燃料电池的空气流动路径的限制,并且增加压缩机的速度以提供期望的气流 燃料电池。 在至少一些实施方案中,增加压缩机的速度增加了从燃料电池抽取的功率以对压缩机供电并且有助于增加燃料电池的热量。 压缩机的增加的速度也可能导致来自压缩机的较暖空气流动,这可以进一步增加系统部件的温度。

    Lambda sensing with a fuel cell stack
    24.
    发明授权
    Lambda sensing with a fuel cell stack 有权
    具有燃料电池堆的λ感测

    公开(公告)号:US06893756B2

    公开(公告)日:2005-05-17

    申请号:US10136862

    申请日:2002-04-30

    IPC分类号: H01M8/04 H01M8/06 H01M8/24

    摘要: A sensor for monitoring the lambda of a component of a reactant feed stream flowing through a fuel cell stack. The sensor comprises one or more fuel cells that are sensitive to a change in lambda of a specific component of a reactant feed stream flowing through the fuel cell. The sensitivity of the fuel cell causes a voltage produced by the lambda sensing fuel cell to vary in response to variation in the lambda of the specific component. The variation of the voltage output can be modeled and/or compared to empirical data to correlate the voltage output to the lambda of the specific component. Based on the lambda of the specific component, the operation of the fuel cell stack can be optimized.

    摘要翻译: 用于监测流过燃料电池堆的反应物进料流的组分的λ的传感器。 传感器包括对流过燃料电池的反应物进料流的特定组分的λ变化敏感的一个或多个燃料电池。 燃料电池的灵敏度导致由λ感测燃料电池产生的电压响应于特定部件的λ的变化而变化。 可以对电压输出的变化进行建模和/或与经验数据进行比较,以将电压输出与特定分量的λ相关联。 基于特定成分的λ,可以优化燃料电池堆的操作。

    Controlled shutdown of a fuel cell
    27.
    发明授权
    Controlled shutdown of a fuel cell 有权
    控制关闭燃料电池

    公开(公告)号:US06376112B1

    公开(公告)日:2002-04-23

    申请号:US09502876

    申请日:2000-02-11

    IPC分类号: H01M804

    摘要: A method is provided for the shutdown of a fuel cell system to relieve system overpressure while maintaining air compressor operation, and corresponding vent valving and control arrangement. The method and venting arrangement are employed in a fuel cell system, for instance a vehicle propulsion system, comprising, in fluid communication, an air compressor having an outlet for providing air to the system, a combustor operative to provide combustor exhaust to the fuel processor.

    摘要翻译: 提供了一种用于关闭燃料电池系统以减少系统超压同时保持空气压缩机运行的方法,以及相应的通风阀和控制装置。 该方法和排气装置用于燃料电池系统,例如车辆推进系统,其包括流体连通的空气压缩机,该空气压缩机具有用于向系统提供空气的出口,用于向燃料处理器提供燃烧器排气的燃烧器 。

    Fuel cell system logic for differentiating between rapid and normal
shutdown commands
    28.
    发明授权
    Fuel cell system logic for differentiating between rapid and normal shutdown commands 有权
    用于区分快速和正常关机命令的燃料电池系统逻辑

    公开(公告)号:US6159626A

    公开(公告)日:2000-12-12

    申请号:US345139

    申请日:1999-07-06

    摘要: A method of controlling the operation of a fuel cell system wherein each shutdown command for the system is subjected to decision logic which determines whether the command should be a normal shutdown command or rapid shutdown command. If the logic determines that the shutdown command should be a normal shutdown command, then the system is shutdown in a normal step-by-step process in which the hydrogen stream is consumed within the system. If the logic determines that the shutdown command should be a rapid shutdown command, the hydrogen stream is removed from the system either by dumping to atmosphere or routing to storage.

    摘要翻译: 一种控制燃料电池系统的操作的方法,其中用于系统的每个关机命令都经过决定逻辑,该判定逻辑确定该命令是正常关机命令还是快速关机命令。 如果逻辑确定shutdown命令应该是一个正常的shutdown命令,那么系统将在系统中消耗氢气流的正常分步过程中关闭。 如果逻辑确定shutdown命令应该是快速关闭命令,则通过倾倒到大气中或将路由到存储器将氢流从系统中移除。

    SUBZERO AMBIENT SHUTDOWN PURGE OPERATING STRATEGY FOR PEM FUEL CELL SYSTEM
    29.
    发明申请
    SUBZERO AMBIENT SHUTDOWN PURGE OPERATING STRATEGY FOR PEM FUEL CELL SYSTEM 有权
    用于PEM燃料电池系统的辅助关闭冲程运行策略

    公开(公告)号:US20130260185A1

    公开(公告)日:2013-10-03

    申请号:US13431703

    申请日:2012-03-27

    IPC分类号: H01M8/06 H01M16/00

    摘要: A method for purging water from a fuel cell stack at fuel cell system shutdown. The method includes determining a stack water generation request to control the rate of drying of membranes in the stack and determining a cathode catalytic heating water generation request. A maximum charge a battery in the fuel cell system can accept is also determined. An ancillary power request for powering components of the fuel cell system during shutdown is determined. The method allocates how much of the water generation request will be fulfilled by operating the fuel cell stack to charge the battery and to provide the power needed for the ancillary power request, and how much of the water generation request will be fulfilled by cathode catalytic heating that produces water and heat in a cathode side of the fuel cell stack.

    摘要翻译: 一种在燃料电池系统关闭时从燃料电池堆排出水的方法。 该方法包括确定堆积水生成请求以控制堆叠中的膜的干燥速率并确定阴极催化加热水产生请求。 也可以确定燃料电池系统中可以接受的电池的最大充电量。 确定在关闭期间为燃料电池系统的组件供电的辅助功率请求。 该方法通过操作燃料电池堆来对电池进行充电并提供辅助电力需求所需的功率,并通过阴极催化加热达到多少水分产生要求, 其在燃料电池堆的阴极侧产生水和热。