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    Method for the detection of fuel cell system short circuits
    1.
    发明授权
    Method for the detection of fuel cell system short circuits 有权
    燃料电池系统短路检测方法

    公开(公告)号：US09048475B2

    公开(公告)日：2015-06-02

    申请号：US13759128

    申请日：2013-02-05

    Applicant: GM Global Technology Operations LLC

    Inventor： Robert S. Foley

    IPC: H01M8/04

    CPC classification number: H01M8/04664 ,  H01M8/04537 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/04679 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

    Abstract: An apparatus and method to detect a short circuit event in a fuel cell system of a vehicle. The detection relies on three existing sensors within the fuel cell system, two current sensors and a voltage sensor. A controller executes an algorithm with a set of thresholds stored in a computer readable medium to monitor the sensors to sense if any of the threshold values are crossed. If crossed, the controller may take remedial action to stop the short circuit and/or prevent damage to the fuel cell system. A mode manager may work with the controller to determine when the operating conditions of the fuel cell system are ideal for sensing for a low voltage condition indicative of a short circuit event. A pair of integrators may be electrically coupled to an alternating current sensor to differentiate a short circuit event from a high frequency resistance current.

    Abstract translation: 一种用于检测车辆的燃料电池系统中的短路事件的装置和方法。 检测依赖于燃料电池系统内的三个现有传感器，两个电流传感器和一个电压传感器。 控制器执行具有存储在计算机可读介质中的一组阈值的算法来监视传感器以检测是否有任何阈值被越过。 如果交叉，则控制器可以采取补救措施来停止短路和/或防止对燃料电池系统的损坏。 模式管理器可以与控制器一起确定燃料电池系统的操作条件何时理想用于感测表示短路事件的低电压条件。 一对积分器可以电耦合到交流电流传感器以将短路事件与高频电阻电流区分开。

    Estimating coolant conductivity in a multi-voltage fuel cell system
    3.
    发明授权
    Estimating coolant conductivity in a multi-voltage fuel cell system 有权
    估算多电压燃料电池系统中的冷却剂导电率

    公开(公告)号：US09068922B2

    公开(公告)日：2015-06-30

    申请号：US13832135

    申请日：2013-03-15

    Applicant: GM Global Technology Operations LLC

    Inventor： Robert S. Foley

    IPC: G01N27/02 ,  G01N27/06 ,  H01M8/04

    CPC classification number: G01N27/06 ,  H01M8/04559 ,  H01M8/04813 ,  H01M8/04949 ,  H01M8/04992 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

    Abstract: A coolant conductivity method and apparatus used to determine when a coolant, circulating through a vehicle's coolant system, starts to conduct electrical current and loses its electrical isolation properties. The system includes a battery monitor controller senses one or more isolation resistances placed throughout a fuel cell system and is programmed to run an isolation algorithm. The isolation algorithm opens and closes contactors in a specific order, measures the resistance of the one or more isolation resistances and calculates a coolant conductivity value. The system will indicate when the coolant needs to be replaced.

    Abstract translation: 一种用于确定通过车辆冷却剂系统循环的冷却剂何时开始导通电流并丧失其电隔离特性的冷却剂导电方法和装置。 该系统包括电池监视器控制器感测放置在燃料电池系统中的一个或多个隔离电阻，并被编程以运行隔离算法。 隔离算法以特定的顺序打开和关闭接触器，测量一个或多个隔离电阻的电阻，并计算冷却剂电导率值。 系统将指示何时需要更换冷却液。

    Method For The Detection Of Fuel Cell System Short Circuits
    4.
    发明申请
    Method For The Detection Of Fuel Cell System Short Circuits 有权
    燃料电池系统短路检测方法

    公开(公告)号：US20140220465A1

    公开(公告)日：2014-08-07

    申请号：US13759128

    申请日：2013-02-05

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Robert S. Foley

    IPC: H01M8/04

    CPC classification number: H01M8/04664 ,  H01M8/04537 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/04679 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

    Abstract: An apparatus and method to detect a short circuit event in a fuel cell system of a vehicle. The detection relies on three existing sensors within the fuel cell system, two current sensors and a voltage sensor. A controller executes an algorithm with a set of thresholds stored in a computer readable medium to monitor the sensors to sense if any of the threshold values are crossed. If crossed, the controller may take remedial action to stop the short circuit and/or prevent damage to the fuel cell system. A mode manager may work with the controller to determine when the operating conditions of the fuel cell system are ideal for sensing for a low voltage condition indicative of a short circuit event. A pair of integrators may be electrically coupled to an alternating current sensor to differentiate a short circuit event from a high frequency resistance current.

    Abstract translation: 一种用于检测车辆的燃料电池系统中的短路事件的装置和方法。 检测依赖于燃料电池系统内的三个现有传感器，两个电流传感器和一个电压传感器。 控制器执行具有存储在计算机可读介质中的一组阈值的算法来监视传感器以检测是否有任何阈值被越过。 如果交叉，则控制器可以采取补救措施来停止短路和/或防止对燃料电池系统的损坏。 模式管理器可以与控制器一起确定燃料电池系统的操作条件何时理想用于感测表示短路事件的低电压条件。 一对积分器可以电耦合到交流电流传感器以将短路事件与高频电阻电流区分开。

    POWER CONVERTER WITH DIAGNOSTIC UNIT POWER SUPPLY OUTPUT
    5.
    发明申请
    POWER CONVERTER WITH DIAGNOSTIC UNIT POWER SUPPLY OUTPUT 有权
    电源转换器，带诊断单元电源输出

    公开(公告)号：US20130127243A1

    公开(公告)日：2013-05-23

    申请号：US13653003

    申请日：2012-10-16

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Joseph Berg ,  John W. Meyer, III ,  Wesley O. Hamilton ,  Robert S. Foley

    IPC: B60R16/03

    CPC classification number: B60L3/0053 ,  B60L3/04 ,  B60L7/14 ,  B60L11/1803 ,  B60L11/1868 ,  B60L11/1885 ,  B60L11/1887 ,  B60L2210/12 ,  Y02T10/7066 ,  Y02T10/7233 ,  Y02T90/34

    Abstract: A power converter includes positive and negative input lines and an input capacitor coupled across the input lines. The power converter also includes a switch coupled across the input lines that includes a control contact and an additional contact. The power converter also includes switch controller coupled to the control contact and that includes positive and negative input connections. The power converter also includes a contactor diagnostic supply interface coupled between the positive input connection and the additional contact.

    Abstract translation: 功率转换器包括正输入线和负输入线以及耦合在输入线两端的输入电容。 功率转换器还包括耦合在输入线上的开关，其包括控制触点和附加触点。 功率转换器还包括耦合到控制触点并且包括正和负输入连接的开关控制器。 电源转换器还包括耦合在正输入连接和附加触点之间的接触器诊断电源接口。

    Operation of a fuel cell stack to prevent low oxygen concentrations in a surrounding enclosed space
    6.
    发明授权
    Operation of a fuel cell stack to prevent low oxygen concentrations in a surrounding enclosed space 有权

    公开(公告)号：US10763528B2

    公开(公告)日：2020-09-01

    申请号：US15707201

    申请日：2017-09-18

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Robert S. Foley ,  Jeffrey J. Gagliardo

    IPC: H01M8/04992 ,  B60L58/30 ,  H01M8/0444 ,  H01M8/043 ,  H01M8/04302

    Abstract: A method of operating a fuel cell stack that powers a vehicle includes determining when the vehicle is in a non-moving state, calculating an O2 concentration over time of an assumed enclosed space while the vehicle is in the non-moving state, establishing a set of O2 concentration concern levels that includes a first O2 concentration concern level being less than a standard atmospheric O2 concentration and a second O2 concentration concern level being less than the first O2 concentration concern level, comparing the O2 concentration of the assumed enclosed space over time with the set of O2 concentration concern levels, and operating the fuel cell stack without restriction when the vehicle is in the non-moving state so long as the O2 concentration of the assumed enclosed space remains greater than the first O2 concentration concern level.

    ESTIMATING COOLANT CONDUCTIVITY IN A MULTI-VOLTAGE FUEL CELL SYSTEM
    8.
    发明申请
    ESTIMATING COOLANT CONDUCTIVITY IN A MULTI-VOLTAGE FUEL CELL SYSTEM 有权
    估计多电压燃料电池系统中的冷却电导率

    公开(公告)号：US20140266223A1

    公开(公告)日：2014-09-18

    申请号：US13832135

    申请日：2013-03-15

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Robert S. Foley

    IPC: G01N27/06 ,  H01M8/04

    CPC classification number: G01N27/06 ,  H01M8/04559 ,  H01M8/04813 ,  H01M8/04949 ,  H01M8/04992 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

    Abstract: A coolant conductivity method and apparatus used to determine when a coolant, circulating through a vehicle's coolant system, starts to conduct electrical current and loses its electrical isolation properties. The system includes a battery monitor controller senses one or more isolation resistances placed throughout a fuel cell system and is programmed to run an isolation algorithm. The isolation algorithm opens and closes contactors in a specific order, measures the resistance of the one or more isolation resistances and calculates a coolant conductivity value. The system will indicate when the coolant needs to be replaced.

    Abstract translation: 一种用于确定通过车辆冷却剂系统循环的冷却剂何时开始导通电流并丧失其电隔离特性的冷却剂导电方法和装置。 该系统包括电池监视器控制器感测放置在燃料电池系统中的一个或多个隔离电阻，并被编程以运行隔离算法。 隔离算法以特定的顺序打开和关闭接触器，测量一个或多个隔离电阻的电阻，并计算冷却剂电导率值。 系统将指示何时需要更换冷却液。

    OPERATION OF A FUEL CELL STACK TO PREVENT LOW OXYGEN CONCENTRATIONS IN A SURROUNDING ENCLOSED SPACE
    9.
    发明申请
    OPERATION OF A FUEL CELL STACK TO PREVENT LOW OXYGEN CONCENTRATIONS IN A SURROUNDING ENCLOSED SPACE 审中-公开

    公开(公告)号：US20190088963A1

    公开(公告)日：2019-03-21

    申请号：US15707201

    申请日：2017-09-18

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Robert S. Foley ,  Jeffrey J. Gagliardo

    IPC: H01M8/04992 ,  H01M8/04302

    Abstract: A method of operating a fuel cell stack that powers a vehicle includes determining when the vehicle is in a non-moving state, calculating an O2 concentration over time of an assumed enclosed space while the vehicle is in the non-moving state, establishing a set of O2 concentration concern levels that includes a first O2 concentration concern level being less than a standard atmospheric O2 concentration and a second O2 concentration concern level being less than the first O2 concentration concern level, comparing the O2 concentration of the assumed enclosed space over time with the set of O2 concentration concern levels, and operating the fuel cell stack without restriction when the vehicle is in the non-moving state so long as the O2 concentration of the assumed enclosed space remains greater than the first O2 concentration concern level.

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