公开(公告)号：US10522859B2

公开(公告)日：2019-12-31

申请号：US15583389

申请日：2017-05-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Srikanth Arisetty ,  Andrew J. Maslyn ,  Balasubramanian Lakshmanan ,  Robert J. Moses

IPC: H01M8/04 ,  H01M8/04858 ,  H01M8/04746

Abstract: A fuel cell system includes a fuel cell stack and a controller. The fuel cell stack includes a catalyst and a stack voltage. The controller increases efficiency of the fuel cell stack by minimizing or removing an accumulation of oxides on the catalyst during a low-power operating mode of the fuel cell system. The controller executes a method for dynamically controlling the stack voltage during a detected low-power operating mode. The method includes commanding low-voltage/high-power pulses to the fuel cell stack via the controller at a magnitude and frequency sufficient for minimizing or removing the oxides. The system may include a direct current-direct current (DC-DC) boost converter, with the controller programmed to command the power pulses from the DC-DC boost converter. Or, the controller may be configured to command the power pulses by controlling a feed rate of the oxygen and/or the hydrogen.

公开(公告)号：US20180345819A1

公开(公告)日：2018-12-06

申请号：US15609893

申请日：2017-05-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jun Cai ,  Joseph Castelluccio ,  Sergio E. Garcia ,  Andrew J. Maslyn

IPC: B60L15/00 ,  H01M8/04858 ,  H01M8/04302 ,  H01M16/00 ,  H01M8/04746 ,  B60L11/18 ,  B60L15/04 ,  H02M3/155 ,  H02P27/06

CPC classification number: B60L15/007 ,  B60L15/04 ,  B60L50/51 ,  B60L50/64 ,  B60L50/72 ,  B60L2210/14 ,  B60L2210/42 ,  B60L2240/527 ,  H01M8/04302 ,  H01M8/04753 ,  H01M8/0488 ,  H01M16/006 ,  H01M2008/1095 ,  H01M2250/20 ,  H02M3/156

Abstract: A fuel cell system for a vehicle or other system includes a fuel cell stack, a DC-DC boost converter, and a controller. The stack has a plurality of fuel cells and a stack voltage. The controller regulates the stack voltage during start-up of the fuel cell stack via the boost converter, and is programmed with a plurality of calibrated voltage profiles each having a corresponding magnitude and rate of change. The controller is configured to execute a method which includes detecting an air start of the fuel cell stack in response to a requested start-up of the fuel cell stack. The controller then enforces the stack voltage to the predetermined voltage profiles during an actual start-up of the fuel cell stack, doing so via regulation of the boost converter and using the plurality of calibrated voltage profiles.

公开(公告)号：US20190162790A1

公开(公告)日：2019-05-30

申请号：US15825672

申请日：2017-11-29

Applicant: GM Global Technology Operations LLC

Inventor： Jeffrey J. Gagliardo ,  Andrew J. Maslyn ,  Joseph Berg

IPC: G01R31/36 ,  B60W10/04 ,  H01M8/04537

Abstract: A method for evaluating voltage sensor output using a diagnostic system includes: measuring an overall fuel cell stack voltage using a stack voltage sensor; identifying a fuel cell voltage of a first end cell using a first end cell voltage sensor and a second end cell using a second end cell voltage sensor; determining if a maximum value of the overall fuel cell stack voltage, the fuel cell voltage of the first end cell or the second end cell is less than a sensor limit, and if a minimum value of the fuel cell voltages is greater than the sensor limit; performing a test to identify if the maximum value is greater than an average sensor signal value and if the average sensor signal value is greater than the minimum value; and conducting a test to identify if the minimum value is less than a first predetermined threshold.

公开(公告)号：US09947950B2

公开(公告)日：2018-04-17

申请号：US14869467

申请日：2015-09-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Srikanth Arisetty ,  Andrew J. Maslyn ,  Balasubramanian Lakshmanan

IPC: H01M8/04701 ,  H01M8/04537 ,  H01M8/0444 ,  H01M8/04828

CPC classification number: H01M8/04723 ,  B60L11/1881 ,  G01R31/3675 ,  H01M8/0444 ,  H01M8/04544 ,  H01M8/04559 ,  H01M8/04574 ,  H01M8/04604 ,  H01M8/04701 ,  H01M8/04835 ,  H01M8/0485 ,  H01M8/04992 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02T90/32

Abstract: Systems and methods for initiating voltage recovery procedures in a fuel cell system based in part on an estimated specific activity over the life of a fuel cell catalyst are presented. In certain embodiments, SA loss of catalyst and electrochemical surface area loss of a FC system may be estimated. An output voltage of the FC system may be estimated based on the estimated SA loss and the electrochemical surface area loss. An amount of recoverable voltage loss may be determined based on a comparison between the estimated output voltage and a measured output voltage. Based on the determined amount of recordable voltage loss, a FC system control action (e.g., a voltage recovery procedure) may be initiated.

公开(公告)号：US09806356B2

公开(公告)日：2017-10-31

申请号：US14495369

申请日：2014-09-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Andrew J. Maslyn ,  Sergio E. Garcia ,  Balasubramanian Lakshmanan ,  Mark P. Adams

IPC: H01M8/04 ,  H01M8/04089 ,  H01M8/04111 ,  H01M8/0444 ,  H01M8/04537 ,  H01M8/04746

CPC classification number: H01M8/04097 ,  H01M8/04111 ,  H01M8/04455 ,  H01M8/04559 ,  H01M8/04753 ,  H01M8/04761 ,  H01M2250/20 ,  Y02T90/32

Abstract: Systems and methods for improving conditions for anion contaminant removal in a cathode of a PEMFC system are presented. A fuel cell system consistent with certain embodiments may include a cathode compartment having a compressor coupled thereto. The compressor may be configured to receive an input cathode gas via a compressor input and supply the input cathode gas to the cathode compartment via a compressor output. The fuel cell system may further include a cathode gas recirculation value coupled to the cathode compartment configured to receive a cathode exhaust gas output and to selectively provide at least a portion of the cathode exhaust gas output to the compressor input. Consistent with certain embodiments disclosed herein, the compressor may be further configured to supply at least a portion of the cathode exhaust gas output to the cathode compartment via the compressor output.

公开(公告)号：US20180316027A1

公开(公告)日：2018-11-01

申请号：US15583389

申请日：2017-05-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Srikanth Arisetty ,  Andrew J. Maslyn ,  Balasubramanian Lakshmanan ,  Robert J. Moses

IPC: H01M8/04858 ,  H01M8/04746 ,  H01M8/04111 ,  H01M8/04082

Abstract: A fuel cell system includes a fuel cell stack and a controller. The fuel cell stack includes a catalyst and a stack voltage. The controller increases efficiency of the fuel cell stack by minimizing or removing an accumulation of oxides on the catalyst during a low-power operating mode of the fuel cell system. The controller executes a method for dynamically controlling the stack voltage during a detected low-power operating mode. The method includes commanding low-voltage/high-power pulses to the fuel cell stack via the controller at a magnitude and frequency sufficient for minimizing or removing the oxides. The system may include a direct current-direct current (DC-DC) boost converter, with the controller programmed to command the power pulses from the DC-DC boost converter. Or, the controller may be configured to command the power pulses by controlling a feed rate of the oxygen and/or the hydrogen.

公开(公告)号：US09099701B2

公开(公告)日：2015-08-04

申请号：US13685474

申请日：2012-11-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Andrew J. Maslyn ,  Paul Taichiang Yu ,  Rohit Makharia

IPC: H01M8/04

CPC classification number: H01M8/04664 ,  H01M8/04305 ,  H01M8/04447 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

Abstract: A system and method for estimating an amount of carbon support loss in fuel cells of a fuel cell stack in a vehicle, for example, during vehicle off-times. The system and method include estimating an amount of time that a hydrogen concentration in the fuel cell stack is zero and calculating an amount of carbon loss based on the amount of time that the hydrogen concentration in the fuel cell stack is zero.

Abstract translation: 一种用于估计车辆中的燃料电池堆的燃料电池中的碳载体损失量的系统和方法，例如在车辆关闭时间期间。 该系统和方法包括估计燃料电池堆中的氢浓度为零的时间量，并且基于燃料电池堆中的氢浓度为零的时间量来计算碳损失量。

公开(公告)号：US20190214664A1

公开(公告)日：2019-07-11

申请号：US15866599

申请日：2018-01-10

Applicant: GM Global Technology Operations LLC

Inventor： Manish Sinha ,  Jingxin Zhang ,  Andrew J. Maslyn

IPC: H01M8/04664 ,  H01M8/04992 ,  H01M8/04537 ,  H01M8/04746 ,  H01M8/04858 ,  B60L11/18

CPC classification number: H01M8/04671 ,  B60L58/30 ,  H01M8/04552 ,  H01M8/04753 ,  H01M8/0491 ,  H01M8/04992 ,  H01M2250/20

Abstract: A fuel cell reversal event is diagnosed by integrating current density via a controller in response to determine an accumulated charge density. The controller executes a control action when the accumulated charge density exceeds a threshold, including recording a diagnostic code indicative of event severity. The control action may include continuing stack operation at reduced power capability when the accumulated charge density exceeds a first threshold and shutting off the stack when the accumulated charge density exceeds a higher second threshold. The event may be detected by calculating a voltage difference between an average and a minimum cell voltage, and then determining if the difference exceeds a voltage difference threshold. The charge density thresholds may be adjusted based on age, state of health, and/or temperature of the fuel cell or stack. A fuel cell system includes the stack and controller.

公开(公告)号：US10971745B2

公开(公告)日：2021-04-06

申请号：US15866599

申请日：2018-01-10

Applicant: GM Global Technology Operations LLC

Inventor： Manish Sinha ,  Jingxin Zhang ,  Andrew J. Maslyn

IPC: H01M8/04664 ,  H01M8/04992 ,  H01M8/04537 ,  H01M8/04746 ,  H01M8/04858 ,  B60L11/18 ,  H01M8/0432 ,  H01M8/04223 ,  B60L58/30

Abstract: A fuel cell reversal event is diagnosed by integrating current density via a controller in response to determine an accumulated charge density. The controller executes a control action when the accumulated charge density exceeds a threshold, including recording a diagnostic code indicative of event severity. The control action may include continuing stack operation at reduced power capability when the accumulated charge density exceeds a first threshold and shutting off the stack when the accumulated charge density exceeds a higher second threshold. The event may be detected by calculating a voltage difference between an average and a minimum cell voltage, and then determining if the difference exceeds a voltage difference threshold. The charge density thresholds may be adjusted based on age, state of health, and/or temperature of the fuel cell or stack. A fuel cell system includes the stack and controller.

公开(公告)号：US10328820B2

公开(公告)日：2019-06-25

申请号：US15609893

申请日：2017-05-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jun Cai ,  Joseph Castelluccio ,  Sergio E. Garcia ,  Andrew J. Maslyn

IPC: H01M8/04 ,  B60L15/00 ,  H01M8/04858 ,  H01M8/04302 ,  H01M16/00 ,  H01M8/04746 ,  B60L15/04 ,  H02P27/06 ,  B60L50/51 ,  B60L50/64 ,  B60L50/72 ,  H01M8/1018 ,  H02M3/156

Abstract: A fuel cell system for a vehicle or other system includes a fuel cell stack, a DC-DC boost converter, and a controller. The stack has a plurality of fuel cells and a stack voltage. The controller regulates the stack voltage during start-up of the fuel cell stack via the boost converter, and is programmed with a plurality of calibrated voltage profiles each having a corresponding magnitude and rate of change. The controller is configured to execute a method which includes detecting an air start of the fuel cell stack in response to a requested start-up of the fuel cell stack. The controller then enforces the stack voltage to the predetermined voltage profiles during an actual start-up of the fuel cell stack, doing so via regulation of the boost converter and using the plurality of calibrated voltage profiles.