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    • 11. 发明申请
    • INJECTOR CONTROL FOR FUEL CELL SYSTEM
    • 喷油器系统喷油器控制
    • US20110143234A1
    • 2011-06-16
    • US12635429
    • 2009-12-10
    • Ralf SennerDaniel C. Di Fiore
    • Ralf SennerDaniel C. Di Fiore
    • H01M8/00H01M8/04
    • H01M8/04097H01M8/04388H01M8/04589H01M8/04753
    • A fuel cell system that employs an injector/ejector for providing fresh hydrogen and anode recirculation gas to the anode side of a fuel cell stack. The injector/ejector is operated with a variable frequency so that the injector open time at low stack current densities is long enough to allow a pressure drop to be provided in the anode flow channels to push out water that may have accumulated therein. In one embodiment, the injector/ejector control provides a minimum pulse width per cycle and a maximum frequency so that as the stack current density decreases below a certain value the frequency decreases from the maximum frequency to maintain the pulse width constant at the minimum pulse width.
    • 一种燃料电池系统,其采用喷射器/喷射器来向燃料电池堆的阳极侧提供新的氢气和阳极再循环气体。 喷射器/喷射器以可变频率操作,使得在低堆电流密度下的喷射器打开时间足够长以允许在阳极流动通道中提供压降以推出可能积聚在其中的水。 在一个实施例中,喷射器/喷射器控制提供每个周期的最小脉冲宽度和最大频率,使得当堆叠电流密度降低到特定值以下时,频率从最大频率减小,以将脉冲宽度保持在最小脉冲宽度 。
    • 12. 发明授权
    • Fuel cell operating method with improved hydrogen and oxygen utilization
    • 燃料电池操作方法具有改善的氢气和氧气利用率
    • US07820333B2
    • 2010-10-26
    • US11113574
    • 2005-04-25
    • Ralf SennerMichael CartwrightJohn Wheat
    • Ralf SennerMichael CartwrightJohn Wheat
    • H01M8/24H01M8/04
    • H01M8/249H01M8/04126H01M8/241H01M8/2457H01M8/2483H01M8/2484H01M2008/1095
    • A fuel cell system wherein a plurality of fuel cells are arranged in a series of stages, the number of fuel cells decreasing in number in each stage from anode gas inlet to the anode gas outlet. The system allows for parallel flow to all of the cells in a given stage and series flow between the various stages. A similar configuration is present on a cathode side of the system. However, the direction of flow is reversed, providing a greater number of cells in the stage nearest the cathode outlet and a fewer number of cells in the stage near the cathode gas inlet. The invention further provides for the various stages to be configured such that the direction of flow of the anode gas of a given stage is generally opposite the direction of flow of the cathode gas of a given stage.
    • 一种燃料电池系统,其中多个燃料电池以一系列的阶段布置,每个阶段的燃料电池的数量从阳极气体入口到阳极气体出口减少。 该系统允许在给定阶段中的所有单元并行流到各个阶段之间的串联流。 类似的配置存在于系统的阴极侧。 然而,流动方向相反,在最靠近阴极出口的阶段中提供更多数量的电池,并且在靠近阴极气体入口的阶段提供更少数量的电池。 本发明还提供了要被配置为使得给定级的阳极气体的流动方向大致与给定级的阴极气体的流动方向相反的各个阶段。
    • 18. 发明授权
    • Cascaded stack with gas flow recycle in the first stage
    • 在第一阶段采用气流回收的级联叠层
    • US08007943B2
    • 2011-08-30
    • US11266605
    • 2005-11-03
    • Ralf Senner
    • Ralf Senner
    • H01M8/00H01M8/06H01M8/24
    • H01M8/04141H01M8/04097H01M8/249
    • A fuel cell system including a humidification system is described. The humidification system employs a recycling system that recycles relatively humid gas exhausted from a multistage fuel cell stack, either on the anode and/or cathode side, and sends this relatively humid gas back to be combined with relatively dry supply gas, such as but not limited to hydrogen and/or air. The humidified supply gas mixture is then reintroduced into the first stage of the multistage fuel cell stack. A recirculation device, such as but not limited to a pump and/or an ejector, can be used to aid in moving the humid exhaust gas back through a recycle gas line to be combined with the supply gas.
    • 描述了包括加湿系统的燃料电池系统。 加湿系统采用循环系统,其循环在阳极和/或阴极侧从多级燃料电池堆排出的相对湿润的气体,并将该相对较湿的气体返回以与相对干燥的供应气体组合,例如但不是 限于氢气和/或空气。 然后将加湿的供应气体混合物重新引入多级燃料电池堆的第一级。 可以使用诸如但不限于泵和/或喷射器的再循环装置来帮助将湿废气返回通过再循环气体管线以与供应气体组合。
    • 20. 发明申请
    • DETECTION METHOD FOR MEMBRANE AND ELECTRODE FAILURES IN FUEL CELL STACKS
    • 燃料电池堆中膜和电极故障的检测方法
    • US20110178742A1
    • 2011-07-21
    • US12690672
    • 2010-01-20
    • Bernd KrauseRalf SennerBalasubramanian LakshmananAndrew J. Maslyn
    • Bernd KrauseRalf SennerBalasubramanian LakshmananAndrew J. Maslyn
    • G01R31/36G06F19/00G01R19/00
    • H01M8/04552G01R31/362H01M8/04671
    • A method for determining a failure of a membrane in a fuel cell in a fuel cell stack. The method includes measuring the voltage of each fuel cell in the fuel cell stack, calculating an average cell voltage from all of the cell voltages of the fuel cells in the fuel cell stack, and identifying a minimum cell voltage from all of the cell voltages of the fuel cells in the fuel cell stack. The method then determines an absolute delta voltage value as the difference between the average cell voltage of the fuel cells and the minimum cell voltage of the fuel cells at a plurality of sample points during the sample period. A plurality of absolute delta voltage values determined over a plurality of sample periods, filtered for low current density are used to determine whether there is a membrane failure and, by filtering for high current density, to determine whether there is an electrode failure.
    • 一种用于确定燃料电池堆中的燃料电池中的膜的故障的方法。 该方法包括测量燃料电池堆中每个燃料电池的电压,从燃料电池堆中的燃料电池的所有电池电压计算平均电池电压,以及从所有电池电压中识别最小电池电压 燃料电池堆中的燃料电池。 该方法然后将绝对增量电压值确定为在采样周期期间多个采样点处的燃料电池的平均电池电压与燃料电池的最小电池电压之差。 使用在低电流密度下滤波的多个采样周期中确定的多个绝对δ电压值来确定是否存在膜故障,并且通过对高电流密度进行滤波来确定是否存在电极故障。