公开(公告)号：US08192879B2

公开(公告)日：2012-06-05

申请号：US12027042

申请日：2008-02-06

申请人： John P. Salvador ,  Sriram Ganapathy ,  Kiran Mallavarapu ,  Frank X Leo ,  Balasubramanian Lakshmanan

发明人： John P. Salvador ,  Sriram Ganapathy ,  Kiran Mallavarapu ,  Frank X Leo ,  Balasubramanian Lakshmanan

IPC分类号： H01M8/04

CPC分类号： H01M8/04641 ,  H01M8/04552 ,  H01M8/04582 ,  H01M8/04619 ,  H01M8/04992

摘要： An algorithm for determining the maximum net power available from a fuel cell stack as the stack degrades over time using an online adaptive estimation of a polarization curve of the stack. The algorithm separates the current density range of the stack into sample regions, and selects a first sample region from the far left of the estimated polarization curve. The algorithm then calculates the cell voltage for that current density sample region, and determines whether the calculated cell voltage is less than or equal to a predetermined cell voltage limit. If the calculated cell voltage is not less than the cell voltage limit, then the algorithm selects the next sample region along the polarization curve. When the calculated cell voltage does reach the cell voltage limit, then the algorithm uses that current density for the sample region being analyzed to calculate the maximum power of the fuel cell stack.

摘要翻译： 一种用于确定当燃料电池堆可用的最大净功率的算法，随着堆栈随着时间的推移而降低，堆叠的极化曲线的在线自适应估计。 该算法将堆叠的电流密度范围分为采样区域，并从估计极化曲线的最左侧选择第一个采样区域。 然后，该算法计算该电流密度采样区域的单元电压，并且确定所计算的单元电压是否小于或等于预定的单元电压限制。 如果计算的电池电压不小于电池电压限制，则算法选择沿着极化曲线的下一个采样区域。 当计算的电池电压达到电池电压极限时，算法使用该分析的样品区域的电流密度来计算燃料电池堆的最大功率。

公开(公告)号：US20110223505A1

公开(公告)日：2011-09-15

申请号：US12724262

申请日：2010-03-15

申请人： Sriram Ganapathy ,  Kiran Mallavarapu ,  Stefan W. Lixfeld ,  Manish Sinha

发明人： Sriram Ganapathy ,  Kiran Mallavarapu ,  Stefan W. Lixfeld ,  Manish Sinha

IPC分类号： H01M8/04

CPC分类号： H01M8/04559 ,  H01M8/04589 ,  H01M8/04604 ,  H01M8/0491 ,  H01M8/04992 ,  H01M2008/1095 ,  Y02E60/50

摘要： A system and method for converting a fuel cell stack power request signal to a stack current set-point that considers stack performance parameters. The method includes obtaining a power-current relationship curve of the fuel cell stack to provide stack parameters including exchange current density and mass transfer coefficient. The method then calculates a slope for the stack using the parameters from the power-current relationship curve estimation that includes calculating a cell voltage at two predetermined stack current densities. The method then calculates a change in current in response to the power request signal, the stack voltage, the stack current and the calculated slope, and uses the change in current to update the current set-point for the stack.

摘要翻译： 一种用于将燃料电池堆功率请求信号转换为考虑堆栈性能参数的堆栈当前设定点的系统和方法。 该方法包括获得燃料电池堆的功率 - 电流关系曲线以提供包括交换电流密度和质量传递系数的堆叠参数。 该方法然后使用来自功率 - 电流关系曲线估计的参数来计算堆叠的斜率，其包括以两个预定的堆叠电流密度计算单元电压。 然后，该方法响应于功率请求信号，堆栈电压，堆栈电流和计算出的斜率来计算电流变化，并且使用电流变化来更新堆栈的当前设定点。

公开(公告)号：US20080206607A1

公开(公告)日：2008-08-28

申请号：US11678743

申请日：2007-02-26

申请人： Kiran Mallavarapu ,  Abdullah B. Alp

发明人： Kiran Mallavarapu ,  Abdullah B. Alp

IPC分类号： H01M8/04

CPC分类号： H01M8/04686 ,  H01M8/04089 ,  H01M8/04104 ,  H01M8/04753 ,  H01M8/249 ,  H01M2250/30 ,  Y02B90/18 ,  Y02E60/50

摘要： A method for controlling a fuel cell system, capable of quickly detecting the pressure rise caused by a faulted open anode injector, reducing pressure in the fuel cell stack when the fault occurs, and taking remedial action to allow continued operation of the fuel cell stack, and militate against a walk-home incident.

摘要翻译： 一种用于控制燃料电池系统的方法，其能够快速检测由故障的开放式阳极喷射器引起的压力升高，当发生故障时减小燃料电池堆中的压力，并采取补救措施以允许燃料电池堆的继续操作， 并打击走路的家事。

公开(公告)号：US09263751B2

公开(公告)日：2016-02-16

申请号：US11678743

申请日：2007-02-26

申请人： Kiran Mallavarapu ,  Abdullah B. Alp

发明人： Kiran Mallavarapu ,  Abdullah B. Alp

IPC分类号： H01M8/04 ,  H01M8/24

CPC分类号： H01M8/04686 ,  H01M8/04089 ,  H01M8/04104 ,  H01M8/04753 ,  H01M8/249 ,  H01M2250/30 ,  Y02B90/18 ,  Y02E60/50

摘要： A method for controlling a fuel cell system, capable of quickly detecting the pressure rise caused by a faulted open anode injector, reducing pressure in the fuel cell stack when the fault occurs, and taking remedial action to allow continued operation of the fuel cell stack, and militate against a walk-home incident.

摘要翻译： 一种用于控制燃料电池系统的方法，其能够快速检测由故障的开放式阳极喷射器引起的压力升高，当发生故障时减小燃料电池堆中的压力，并采取补救措施以允许燃料电池堆的继续操作， 并打击走路的家事。

公开(公告)号：US09231260B2

公开(公告)日：2016-01-05

申请号：US11635235

申请日：2006-12-07

申请人： Frank Leo ,  Kiran Mallavarapu ,  Lihling Tzuu

发明人： Frank Leo ,  Kiran Mallavarapu ,  Lihling Tzuu

IPC分类号： H01M8/04

CPC分类号： H01M8/04201 ,  H01M8/04089 ,  Y02E60/50

摘要： A system and method for redistribution of the flow of fuel under faulted conditions in a fuel cell system is disclosed. The fuel cell system includes a fuel cell stack; a fuel tank for storing fuel; fuel injectors that sequentially supply fuel from the fuel tank to the fuel cell stack; and a controller for determining whether a fault condition exists in one of the fuel injectors. If a fault condition exists in the first injector, the controller is capable of redistributing the flow of fuel from a first injector to a second injector.

摘要翻译： 公开了一种在燃料电池系统的故障条件下重新分配燃料流的系统和方法。 燃料电池系统包括燃料电池堆; 用于储存燃料的燃料箱; 燃料喷射器，其从燃料箱顺序地供应燃料到燃料电池堆; 以及用于确定在一个燃料喷射器中是否存在故障状况的控制器。 如果第一喷射器中存在故障条件，则控制器能够将燃料流从第一喷射器重新分配到第二喷射器。

公开(公告)号：US20100114513A1

公开(公告)日：2010-05-06

申请号：US12262592

申请日：2008-10-31

申请人： Kiran Mallavarapu ,  Sanja Sljivar-Lovria ,  Balasubramanian Lakshmanan ,  Michael F. Zawisa

发明人： Kiran Mallavarapu ,  Sanja Sljivar-Lovria ,  Balasubramanian Lakshmanan ,  Michael F. Zawisa

IPC分类号： G01R19/00

CPC分类号： H01M8/0488 ,  H01M8/04552 ,  H01M8/04559 ,  H01M8/24

摘要： A method of estimating minimum voltage of fuel cells, and a product using same.

摘要翻译： 一种估计燃料电池的最小电压的方法，以及使用其的产品。

公开(公告)号：US20090197127A1

公开(公告)日：2009-08-06

申请号：US12027063

申请日：2008-02-06

申请人： Sriram Ganapathy ,  Kiran Mallavarapu ,  Balasubramanian Lakshmanan ,  John P. Salvador ,  Frank X. Leo

发明人： Sriram Ganapathy ,  Kiran Mallavarapu ,  Balasubramanian Lakshmanan ,  John P. Salvador ,  Frank X. Leo

IPC分类号： H01M8/04 ,  G01R19/08

CPC分类号： H01M8/04992 ,  H01M8/04619 ,  H01M8/04679 ,  H01M8/0491

摘要： A method for providing a current density set-point for a fuel cell stack in response to a power request from the stack where the set-point is determined based on system parameters that identify the life and degradation of the stack. The method includes dividing a current density range of the fuel cell stack into a predetermined number of sample regions, and selecting the sample regions in order from low to high during the current set-point analysis. The method calculates an average cell voltage for the current density of the selected sample region, and stack power from the average cell voltage. The method then determines whether a power request signal is less than the stack power for the selected sample region and greater than the calculated power for the previous sample region, and if so, calculates the current density set-point at the requested power based on these values.

摘要翻译： 一种用于响应于来自堆栈的功率请求提供用于燃料电池堆的电流密度设定点的方法，其中基于识别堆的寿命和劣化的系统参数来确定设定点。 该方法包括将燃料电池堆的电流密度范围划分为预定数量的样本区域，并且在当前设定点分析期间从低到高依次选择样本区域。 该方法计算所选样品区域的电流密度的平均电池电压，并从平均电池电压堆叠功率。 然后，该方法确定功率请求信号是否小于所选择的采样区域的堆叠功率，并且大于先前采样区域的计算功率，并且如果是，则基于这些来计算所请求功率的电流密度设定点 价值观。

公开(公告)号：US20090197125A1

公开(公告)日：2009-08-06

申请号：US12027042

申请日：2008-02-06

申请人： John P. Salvador ,  Sriram Ganapathy ,  Kiran Mallavarapu ,  Frank X. Leo ,  Balasubramanian Lakshmanan

发明人： John P. Salvador ,  Sriram Ganapathy ,  Kiran Mallavarapu ,  Frank X. Leo ,  Balasubramanian Lakshmanan

IPC分类号： H01M8/04

CPC分类号： H01M8/04641 ,  H01M8/04552 ,  H01M8/04582 ,  H01M8/04619 ,  H01M8/04992

摘要： An algorithm for determining the maximum net power available from a fuel cell stack as the stack degrades over time using an online adaptive estimation of a polarization curve of the stack. The algorithm separates the current density range of the stack into sample regions, and selects a first sample region from the far left of the estimated polarization curve. The algorithm then calculates the cell voltage for that current density sample region, and determines whether the calculated cell voltage is less than or equal to a predetermined cell voltage limit. If the calculated cell voltage is not less than the cell voltage limit, then the algorithm selects the next sample region along the polarization curve. When the calculated cell voltage does reach the cell voltage limit, then the algorithm uses that current density for the sample region being analyzed to calculate the maximum power of the fuel cell stack.

摘要翻译： 一种用于确定当燃料电池堆可用的最大净功率的算法，随着堆栈随着时间的推移而降低，堆叠的极化曲线的在线自适应估计。 该算法将堆叠的电流密度范围分为采样区域，并从估计极化曲线的最左侧选择第一个采样区域。 然后，该算法计算该电流密度采样区域的单元电压，并且确定所计算的单元电压是否小于或等于预定的单元电压限制。 如果计算的电池电压不小于电池电压限制，则算法选择沿着极化曲线的下一个采样区域。 当计算的电池电压达到电池电压极限时，算法使用该分析的样品区域的电流密度来计算燃料电池堆的最大功率。

公开(公告)号：US20080138689A1

公开(公告)日：2008-06-12

申请号：US11635235

申请日：2006-12-07

申请人： Frank Leo ,  Kiran Mallavarapu ,  Lihling Tzuu

发明人： Frank Leo ,  Kiran Mallavarapu ,  Lihling Tzuu

IPC分类号： H01M8/04

CPC分类号： H01M8/04201 ,  H01M8/04089 ,  Y02E60/50

摘要： A system and method for redistribution of the flow of fuel under faulted conditions in a fuel cell system is disclosed. The fuel cell system includes a fuel cell stack; a fuel tank for storing fuel; fuel injectors that sequentially supply fuel from the fuel tank to the fuel cell stack; and a controller for determining whether a fault condition exists in one of the fuel injectors. If a fault condition exists in the first injector, the controller is capable of redistributing the flow of fuel from a first injector to a second injector.

摘要翻译： 公开了一种在燃料电池系统的故障条件下重新分配燃料流的系统和方法。 燃料电池系统包括燃料电池堆; 用于储存燃料的燃料箱; 燃料喷射器，其从燃料箱顺序地供应燃料到燃料电池堆; 以及用于确定在一个燃料喷射器中是否存在故障状况的控制器。 如果第一喷射器中存在故障条件，则控制器能够将燃料流从第一喷射器重新分配到第二喷射器。

公开(公告)号：US07011693B2

公开(公告)日：2006-03-14

申请号：US10706319

申请日：2003-11-12

申请人： Kiran Mallavarapu ,  John B Ruhl ,  Craig S. Gittleman

发明人： Kiran Mallavarapu ,  John B Ruhl ,  Craig S. Gittleman

IPC分类号： B01D53/047

CPC分类号： B01D53/047 ,  B01D53/0473 ,  B01D53/261 ,  B01D2256/16 ,  B01D2257/102 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2257/7025 ,  B01D2257/80 ,  B01D2258/0208 ,  B01D2259/40005 ,  B01D2259/40009 ,  B01D2259/4566 ,  Y02C10/08 ,  Y02C20/20

摘要： A PSA unit for purifying hydrogen in a fuel processor system. The PSA unit employs rotary valves that cycle the pressurization of vessels, including an adsorbent, between a high pressure state and a low pressure state. The purified hydrogen is released from the vessels through a purified gas output port when the vessels are in the high pressure state and the impurities are released through an exhaust port when the vessels are in the low pressure state. The PSA unit also employs a mass flow control device and a pressure sensor in the purified gas output port. A controller receives a pressure signal from the pressure sensor, and controls the flow through the mass flow control device and the speed of the rotary valves so that the proper pressure is maintained at the hydrogen output port.

摘要翻译： 用于在燃料处理器系统中净化氢的PSA单元。 PSA单元使用旋转阀，其在高压状态和低压状态之间循环包括吸附剂在内的容器的加压。 当容器处于高压状态时，净化的氢气通过净化的气体输出口从容器中释放出来，并且当容器处于低压状态时杂质通过排气口释放。 PSA单元还在净化气体输出口中采用质量流量控制装置和压力传感器。 控制器从压力传感器接收压力信号，并控制通过质量流量控制装置的流量和旋转阀的速度，使得在氢气输出口保持适当的压力。