公开(公告)号：US08722264B2

公开(公告)日：2014-05-13

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

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：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：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：US09105892B2

公开(公告)日：2015-08-11

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 ,  H01M8/10

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：US20120019254A1

公开(公告)日：2012-01-26

申请号：US12840014

申请日：2010-07-20

申请人： Yanyan Zhang ,  Sriram Ganapathy ,  Kiran Mallavarapu

发明人： Yanyan Zhang ,  Sriram Ganapathy ,  Kiran Mallavarapu

IPC分类号： G01N27/416

CPC分类号： H01M8/04552 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/04992 ,  H01M2008/1095

摘要： A system for estimating parameters of a fuel cell stack. The system includes a stack health monitor for monitoring minimum cell voltage, stack voltage and current density of the fuel cell stack. The stack health monitor also indicates when a predetermined minimum cell voltage threshold level has been achieved. The system further includes a controller configured to control the fuel cell stack, where the controller determines and records the average fuel cell voltage. The controller generates and stores artificial data points proximate to the one or more predetermined minimum cell voltage threshold levels each time the minimum cell voltage drops below the one or more predetermined minimum cell voltage threshold levels so as to provide an estimation of the fuel cell stack parameters including a minimum cell voltage trend and a minimum cell voltage polarization curve.

摘要翻译： 一种用于估计燃料电池堆的参数的系统。 该系统包括用于监测燃料电池堆的最小电池电压，堆叠电压和电流密度的堆叠健康监测器。 堆栈运行状况监视器还指示何时已经实现了预定的最小单元电压阈值电平。 该系统还包括控制器，其被配置为控制燃料电池堆，其中控制器确定并记录燃料电池的平均电压。 每当最小单元电压下降到低于一个或多个预定最小单元电压阈值电平时，控制器产生并存储靠近一个或多个预定最小单元电压阈值电平的人造数据点，以便提供燃料电池堆参数的估计 包括最小电池电压趋势和最小电池电压极化曲线。

公开(公告)号：US08405399B2

公开(公告)日：2013-03-26

申请号：US12840014

申请日：2010-07-20

申请人： Yanyan Zhang ,  Sriram Ganapathy ,  Kiran Mallavarapu

发明人： Yanyan Zhang ,  Sriram Ganapathy ,  Kiran Mallavarapu

IPC分类号： G01N27/416

CPC分类号： H01M8/04552 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/04992 ,  H01M2008/1095

摘要： A system for estimating parameters of a fuel cell stack. The system includes a stack health monitor for monitoring minimum cell voltage, stack voltage and current density of the fuel cell stack. The stack health monitor also indicates when a predetermined minimum cell voltage threshold level has been achieved. The system further includes a controller configured to control the fuel cell stack, where the controller determines and records the average fuel cell voltage. The controller generates and stores artificial data points proximate to the one or more predetermined minimum cell voltage threshold levels each time the minimum cell voltage drops below the one or more predetermined minimum cell voltage threshold levels so as to provide an estimation of the fuel cell stack parameters including a minimum cell voltage trend and a minimum cell voltage polarization curve.

摘要翻译： 一种用于估计燃料电池堆的参数的系统。 该系统包括用于监测燃料电池堆的最小电池电压，堆叠电压和电流密度的堆叠健康监测器。 堆栈运行状况监视器还指示何时已经实现了预定的最小单元电压阈值电平。 该系统还包括控制器，其被配置为控制燃料电池堆，其中控制器确定并记录燃料电池的平均电压。 每当最小单元电压下降到低于一个或多个预定最小单元电压阈值电平时，控制器产生并存储靠近一个或多个预定最小单元电压阈值电平的人造数据点，以便提供燃料电池堆参数的估计 包括最小电池电压趋势和最小电池电压极化曲线。

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：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：US06959249B2

公开(公告)日：2005-10-25

申请号：US10725680

申请日：2003-12-02

申请人： Bruce Jeffrey Clingerman ,  Kiran Mallavarapu ,  Akbar Chowdhury

发明人： Bruce Jeffrey Clingerman ,  Kiran Mallavarapu ,  Akbar Chowdhury

IPC分类号： H01M8/10 ,  G06F19/00 ,  H01M8/04 ,  H01M16/00

CPC分类号： H01M16/006 ,  H01M8/04567 ,  H01M8/04589 ,  H01M8/04604 ,  H01M8/04753 ,  H01M8/04917 ,  H01M8/04992

摘要： A fuel cell generation system employing a load following algorithm that provides the desired output power from the fuel cell on demand. The system includes a draw current sensor that measures the current drawn from the fuel cell used to satisfy the system load demands. The load following algorithm uses the measured draw current to identify the proper amount of fuel and air to meet the load demands, and then provides a buffer of extra fuel and air to the fuel cell so if the load demand suddenly increases, the fuel cell is able to immediately produce the extra output power. As the current drawn from the fuel cell changes in response to changing load demands, the load following algorithm causes the amount of fuel and air being applied to the fuel cell stack to increase and decrease so that the buffer of extra fuel and air is maintained substantially constant.

摘要翻译： 一种采用负载追踪算法的燃料电池生成系统，其根据需要从燃料电池提供期望的输出功率。 该系统包括一个牵引电流传感器，它测量从用于满足系统负载要求的燃料电池中抽出的电流。 负载跟踪算法使用测量的牵引电流来识别适当的燃料和空气量以满足负载需求，然后向燃料电池提供额外的燃料和空气的缓冲器，因此如果负载需求突然增加，燃料电池是 能够立即产生额外的输出功率。 随着从燃料电池抽取的电流响应于负载需求的变化而变化，负载跟随算法导致燃料和空气被施加到燃料电池堆的量增加和减少，使得额外的燃料和空气的缓冲器基本保持 不变。