公开(公告)号：US07955743B2

公开(公告)日：2011-06-07

申请号：US12027049

申请日：2008-02-06

申请人： Sriram Ganapathy ,  David A. Arthur ,  Manish Sinha ,  John P. Salvador ,  David R. Savage ,  Frank X. Leo

发明人： Sriram Ganapathy ,  David A. Arthur ,  Manish Sinha ,  John P. Salvador ,  David R. Savage ,  Frank X. Leo

IPC分类号： H01M8/04

CPC分类号： H01M8/04649 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/0491 ,  H01M8/0494 ,  H01M8/04992

摘要： A system and method for limiting the output current of a fuel cell stack as the stack degrades overtime. A look-up table identifies a predetermined voltage set-point for stack current density. A first comparator provides a voltage difference signal between the set-point and the stack voltage. The voltage difference signal is provided to a controller, such as a proportional-integral controller, that provides a current limiting signal. The current limiting signal and a current request signal are provided to a second comparator that selects which signal will be used to limit the maximum output current of the stack. A polarization curve estimator estimates parameters of the stack that will change over the life of the stack. The parameters are provided to a gain scheduler that provides gains to the controller that are based on where in the life of the stack it is currently operating.

摘要翻译： 一种用于限制燃料电池堆的输出电流的系统和方法，因为堆叠降低了加班时间。 查找表识别堆电流密度的预定电压设定点。 第一比较器在设定点和堆叠电压之间提供电压差信号。 电压差信号被提供给提供限流信号的控制器，例如比例积分控制器。 电流限制信号和当前请求信号被提供给第二比较器，第二比较器选择哪个信号将用于限制堆叠的最大输出电流。 极化曲线估计器估计将在堆栈的寿命内改变的堆栈的参数。 这些参数被提供给增益调度器，其为控制器提供增益，其基于其当前正在操作的堆栈的寿命。

公开(公告)号：US20090197126A1

公开(公告)日：2009-08-06

申请号：US12027049

申请日：2008-02-06

申请人： Sriram Ganapathy ,  David A. Arthur ,  Manish Sinha ,  John P. Salvador ,  David R. Savage ,  Frank X. Leo

发明人： Sriram Ganapathy ,  David A. Arthur ,  Manish Sinha ,  John P. Salvador ,  David R. Savage ,  Frank X. Leo

IPC分类号： H01M8/04

CPC分类号： H01M8/04649 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/0491 ,  H01M8/0494 ,  H01M8/04992

摘要： A system and method for limiting the output current of a fuel cell stack as the stack degrades overtime. A look-up table identifies a predetermined voltage set-point for stack current density. A first comparator provides a voltage difference signal between the set-point and the stack voltage. The voltage difference signal is provided to a controller, such as a proportional-integral controller, that provides a current limiting signal. The current limiting signal and a current request signal are provided to a second comparator that selects which signal will be used to limit the maximum output current of the stack. A polarization curve estimator estimates parameters of the stack that will change over the life of the stack. The parameters are provided to a gain scheduler that provides gains to the controller that are based on where in the life of the stack it is currently operating.

摘要翻译： 一种用于限制燃料电池堆的输出电流的系统和方法，因为堆叠降低了加班时间。 查找表识别堆电流密度的预定电压设定点。 第一比较器在设定点和堆叠电压之间提供电压差信号。 电压差信号被提供给提供限流信号的控制器，例如比例积分控制器。 电流限制信号和当前请求信号被提供给第二比较器，第二比较器选择哪个信号将用于限制堆叠的最大输出电流。 极化曲线估计器估计将在堆栈的寿命内改变的堆栈的参数。 这些参数被提供给增益调度器，其为控制器提供增益，其基于其当前正在操作的堆栈的寿命。

公开(公告)号：US20110200895A1

公开(公告)日：2011-08-18

申请号：US12708461

申请日：2010-02-18

申请人： Manish Sinha ,  Sriram Ganapathy ,  Tayoung Choi ,  David A. Arthur

发明人： Manish Sinha ,  Sriram Ganapathy ,  Tayoung Choi ,  David A. Arthur

IPC分类号： H01M8/06

CPC分类号： H01M8/04835 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/04843 ,  H01M2008/1095

摘要： A system and method for determining when to trigger reconditioning of a fuel cell stack and when to disable the reconditioning of the fuel cell stack. In one embodiment, the stack reconditioning is triggered when a maximum stack power estimation falls below a first predetermined power threshold. The reconditioning of the stack can be disabled so it is not performed when the trigger occurs if the reconditioning process does not raise the maximum power estimation above a second predetermined power threshold or the time from one reconditioning trigger to a next reconditioning trigger is less than a predetermined time threshold, or both.

摘要翻译： 一种用于确定何时触发燃料电池堆的再调节以及何时禁用燃料电池堆的再调节的系统和方法。 在一个实施例中，当最大堆叠功率估计低于第一预定功率阈值时触发堆栈重新调整。 可以禁用堆叠的修复，因此如果再生过程没有将最大功率估计提高到高于第二预定功率阈值或者从一个再调整触发到下一个修复触发的时间小于 预定时间阈值或两者。

公开(公告)号：US08450018B2

公开(公告)日：2013-05-28

申请号：US12708461

申请日：2010-02-18

申请人： Manish Sinha ,  Sriram Ganapathy ,  Tayoung Choi ,  David A. Arthur

发明人： Manish Sinha ,  Sriram Ganapathy ,  Tayoung Choi ,  David A. Arthur

IPC分类号： H01M8/06

CPC分类号： H01M8/04835 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/04843 ,  H01M2008/1095

摘要： A system and method for determining when to trigger reconditioning of a fuel cell stack and when to disable the reconditioning of the fuel cell stack. In one embodiment, the stack reconditioning is triggered when a maximum stack power estimation falls below a first predetermined power threshold. The reconditioning of the stack can be disabled so it is not performed when the trigger occurs if the reconditioning process does not raise the maximum power estimation above a second predetermined power threshold or the time from one reconditioning trigger to a next reconditioning trigger is less than a predetermined time threshold, or both.

摘要翻译： 一种用于确定何时触发燃料电池堆的再调节以及何时禁用燃料电池堆的再调节的系统和方法。 在一个实施例中，当最大堆叠功率估计低于第一预定功率阈值时触发堆栈重新调整。 可以禁用堆叠的修复，因此如果再生过程没有将最大功率估计提高到高于第二预定功率阈值或者从一个再调整触发到下一个修复触发的时间小于 预定时间阈值或两者。

公开(公告)号：US09368817B2

公开(公告)日：2016-06-14

申请号：US12580863

申请日：2009-10-16

申请人： Daniel T. Folmsbee ,  Balasubramanian Lakshmanan ,  John P. Salvador ,  Joe C. Machuca ,  Bernd Krause ,  David R. Savage ,  David A. Arthur ,  Derek R. Lebzelter

发明人： Daniel T. Folmsbee ,  Balasubramanian Lakshmanan ,  John P. Salvador ,  Joe C. Machuca ,  Bernd Krause ,  David R. Savage ,  David A. Arthur ,  Derek R. Lebzelter

IPC分类号： H01M8/04

CPC分类号： H01M8/04388 ,  H01M8/04126 ,  H01M8/04231 ,  H01M8/0441 ,  H01M8/04492 ,  H01M8/04507 ,  H01M8/04753 ,  H01M8/04828 ,  H01M8/04835 ,  H01M8/04843 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

摘要： A method for reconditioning a fuel cell stack. The method includes periodically increasing the relative humidity level of the cathode input airflow to the stack to saturate the cell membrane electrode assemblies to be greater than the relative humidity levels during normal stack operating conditions. The method also includes providing hydrogen to the anode side of the fuel cell stack at system shut down while the membrane electrode assemblies are saturated without stack loads being applied so that the hydrogen crosses the cell membranes to the cathode side and reacts with oxygen to reduce stack contaminants.

摘要翻译： 一种用于再燃燃料电池堆的方法。 该方法包括在正常堆叠操作条件期间周期性地增加阴极输入气流到堆叠的相对湿度水平以使细胞膜电极组件饱和，以使其大于相对湿度水平。 该方法还包括在系统关闭时向燃料电池堆的阳极侧提供氢气，同时膜电极组件饱和而不施加堆叠负载，使得氢气穿过细胞膜至阴极侧并与氧反应以减少堆积 污染物

公开(公告)号：US20110091780A1

公开(公告)日：2011-04-21

申请号：US12580863

申请日：2009-10-16

申请人： Daniel T. Folmsbee ,  Balasubramanian Lakshmanan ,  John P. Salvador ,  Joe C. Machuca ,  Bernd Krause ,  David R. Savage ,  David A. Arthur ,  Derek R. Lebzelter

发明人： Daniel T. Folmsbee ,  Balasubramanian Lakshmanan ,  John P. Salvador ,  Joe C. Machuca ,  Bernd Krause ,  David R. Savage ,  David A. Arthur ,  Derek R. Lebzelter

IPC分类号： H01M8/00

CPC分类号： H01M8/04388 ,  H01M8/04126 ,  H01M8/04231 ,  H01M8/0441 ,  H01M8/04492 ,  H01M8/04507 ,  H01M8/04753 ,  H01M8/04828 ,  H01M8/04835 ,  H01M8/04843 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

摘要： A method for reconditioning a fuel cell stack. The method includes periodically increasing the relative humidity level of the cathode input airflow to the stack to saturate the cell membrane electrode assemblies to be greater than the relative humidity levels during normal stack operating conditions. The method also includes providing hydrogen to the anode side of the fuel cell stack at system shut down while the membrane electrode assemblies are saturated without stack loads being applied so that the hydrogen crosses the cell membranes to the cathode side and reacts with oxygen to reduce stack contaminants.

摘要翻译： 一种用于再燃燃料电池堆的方法。 该方法包括在正常堆叠操作条件期间周期性地增加阴极输入气流到堆叠的相对湿度水平以使细胞膜电极组件饱和，以使其大于相对湿度水平。 该方法还包括在系统关闭时向燃料电池堆的阳极侧提供氢气，同时膜电极组件饱和而不施加堆叠负载，使得氢气穿过细胞膜至阴极侧并与氧反应以减少堆积 污染物

公开(公告)号：US07880429B2

公开(公告)日：2011-02-01

申请号：US12119922

申请日：2008-05-13

申请人： David A. Arthur ,  Sriram Ganapathy

发明人： David A. Arthur ,  Sriram Ganapathy

IPC分类号： H01M10/44 ,  H02J7/00 ,  H01M8/04

CPC分类号： H01M8/04298 ,  H01M8/04552 ,  H01M8/04559 ,  H01M8/04753 ,  H01M8/0491 ,  H01M2008/1095

摘要： A method for controlling the current output from a fuel cell stack to prevent the stack voltage or the minimum fuel cell voltage from dropping below predetermined voltage set-points. The method for the stack voltage control includes determining whether the stack voltage has dropped to the predetermined voltage set-point, and if so, capturing and holding the actual stack current at that point as the maximum allowed stack current. If the stack voltage continues to fall below the voltage set-point, then the voltage set-point is subtracted from the actual voltage to get a positive error signal. Controller gains are then multiplied by the error signal to reduce the current allowed from the stack to drive the error signal to zero, and increase the stack voltage. The method for the minimum fuel cell voltage operates in the same manner, but with different values.

摘要翻译： 一种用于控制来自燃料电池堆的电流输出以防止堆叠电压或最小燃料电池电压降到预定电压设定点以下的方法。 堆叠电压控制的方法包括确定堆叠电压是否已经下降到预定电压设定点，如果是，则将该点处的实际堆叠电流捕获并保持为最大允许堆叠电流。 如果堆叠电压持续低于电压设定值，则从实际电压中减去电压设定值，得到正的误差信号。 然后将控制器增益乘以误差信号，以减少从堆栈允许的电流，将误差信号驱动为零，并增加堆栈电压。 最小燃料电池电压的方法以相同的方式运行，但是具有不同的值。

公开(公告)号：US20090284214A1

公开(公告)日：2009-11-19

申请号：US12119922

申请日：2008-05-13

申请人： David A. Arthur ,  Sriram Ganapathy

发明人： David A. Arthur ,  Sriram Ganapathy

IPC分类号： H01M8/04 ,  H02J7/00

CPC分类号： H01M8/04298 ,  H01M8/04552 ,  H01M8/04559 ,  H01M8/04753 ,  H01M8/0491 ,  H01M2008/1095

摘要： A method for controlling the current output from a fuel cell stack to prevent the stack voltage or the minimum fuel cell voltage from dropping below predetermined voltage set-points. The method for the stack voltage control includes determining whether the stack voltage has dropped to the predetermined voltage set-point, and if so, capturing and holding the actual stack current at that point as the maximum allowed stack current. If the stack voltage continues to fall below the voltage set-point, then the voltage set-point is subtracted from the actual voltage to get a positive error signal. Controller gains are then multiplied by the error signal to reduce the current allowed from the stack to drive the error signal to zero, and increase the stack voltage. The method for the minimum fuel cell voltage operates in the same manner, but with different values.

摘要翻译： 一种用于控制来自燃料电池堆的电流输出以防止堆叠电压或最小燃料电池电压降到预定电压设定点以下的方法。 堆叠电压控制的方法包括确定堆叠电压是否已经下降到预定电压设定点，如果是，则将该点处的实际堆叠电流捕获并保持为最大允许堆叠电流。 如果堆叠电压持续低于电压设定值，则从实际电压中减去电压设定值，得到正的误差信号。 然后将控制器增益乘以误差信号，以减少从堆栈允许的电流，将误差信号驱动为零，并增加堆栈电压。 最小燃料电池电压的方法以相同的方式运行，但是具有不同的值。

公开(公告)号：US20070281193A1

公开(公告)日：2007-12-06

申请号：US11445362

申请日：2006-06-01

申请人： David A. Arthur ,  Manish Sinha

发明人： David A. Arthur ,  Manish Sinha

IPC分类号： H01M8/04

CPC分类号： H01M8/04126 ,  H01M8/04231 ,  H01M8/04253 ,  H01M8/04291 ,  H01M8/04335 ,  H01M8/0435 ,  H01M8/04589 ,  H01M8/04708 ,  H01M8/04716 ,  H01M8/04753 ,  H01M8/04761 ,  H01M8/04843 ,  H01M2008/1095

摘要： A control system for a fuel cell stack that controls the relative humidity of the cathode outlet gas during stack power transients to provide better cathode outlet gas relative humidity control by reducing the dynamic pressure range and thus the dynamic cathode outlet gas relative humidity range. In one embodiment, the control system uses a first narrower cathode pressure range based on stack current density during stack power transients to provide better cathode outlet gas relative humidity control, and uses a second wider cathode pressure range based on stack current density during low current density and steady-state current density to improve system efficiency by decreasing compressor parasitics.

摘要翻译： 一种用于燃料电池堆的控制系统，其在堆叠功率瞬变期间控制阴极出口气体的相对湿度，以通过降低动态压力范围并因此减小动态阴极出口气体相对湿度范围来提供更好的阴极出口气体相对湿度控制。 在一个实施例中，控制系统在堆叠功率瞬变期间使用基于堆叠电流密度的第一较窄阴极压力范围来提供更好的阴极出口气体相对湿度控制，并且在低电流密度期间使用基于堆叠电流密度的第二较宽阴极压力范围 和稳态电流密度，通过减少压缩机寄生效应来提高系统效率。

公开(公告)号：US07862942B2

公开(公告)日：2011-01-04

申请号：US11669893

申请日：2007-01-31

申请人： John P. Salvador ,  Balsu Lakshmanan ,  Abdullah B. Alp ,  David A. Arthur

发明人： John P. Salvador ,  Balsu Lakshmanan ,  Abdullah B. Alp ,  David A. Arthur

IPC分类号： H01M8/04

CPC分类号： H01M8/04164 ,  H01M8/04223 ,  H01M8/04231 ,  H01M8/04302 ,  H01M8/04753 ,  H01M8/0494 ,  H01M8/04955 ,  H01M8/249 ,  H01M2008/1095

摘要： A system and method for reducing cathode carbon corrosion during start-up of a fuel cell stack. If a long enough period of time has gone by since the last system shutdown, then both the anode side and the cathode side of the stack will be filled with air. If the system includes split sub-stacks, then a start-up sequence uses a fast hydrogen purge through each sub-stack separately so as to minimize the time of the hydrogen/air front flowing through the anode side of the stacks. The start-up sequence then employs a slow hydrogen purge through the sub-stacks at the same time. If the time from the last shutdown is short enough where a significant amount of hydrogen still exists in the cathode side and the anode side of the sub-stacks, then the fast hydrogen purge can be eliminated, and the start-up sequence proceeds directly to the slow hydrogen purge.

摘要翻译： 一种用于在燃料电池堆启动期间减少阴极碳腐蚀的系统和方法。 如果从上一次系统关机起已经过了足够长的时间，那么堆叠的阳极侧和阴极侧将充满空气。 如果系统包括拆分的子堆叠，则启动顺序分别使用每个子堆的快速氢气吹扫，以便最小化氢/空气前沿流经堆叠的阳极侧的时间。 然后启动序列同时通过子堆的慢氢气清洗。 如果在最后停机的时间足够短，在堆叠的阴极侧和阳极侧仍然存在显着量的氢气，则可以消除快速氢气清洗，并且启动顺序直接进行到 慢氢气清洗。