公开(公告)号：US20140038073A1

公开(公告)日：2014-02-06

申请号：US14050438

申请日：2013-10-10

Applicant: GM Global Technology Operations LLC

Inventor： Thomas A. Greszler ,  Gary M. Robb ,  John P. Salvador ,  Balasubramanian Lakshmanan ,  Hubert Gasteiger

IPC: H01M8/04

CPC classification number: H01M8/04303 ,  H01M8/04097 ,  H01M8/04223 ,  H01M8/04302 ,  H01M8/242 ,  H01M8/2483 ,  Y02E60/50

Abstract: A fuel cell system including a fuel cell stack having a plurality of fuel cells, each of the fuel cells including an electrolyte membrane disposed between an anode and a cathode, an anode supply manifold in fluid communication with the anodes of the fuel cells, the anode supply manifold providing fluid communication between a source of hydrogen and the anodes, an anode exhaust manifold in fluid communication with the anodes of the fuel cells, and a fan in fluid communication with the anodes of the fuel cells, wherein the fan controls a flow of fluid through the anodes of the fuel cells after the fuel cell system is shutdown.

Abstract translation: 一种燃料电池系统，包括具有多个燃料电池的燃料电池堆，每个燃料电池包括设置在阳极和阴极之间的电解质膜，与燃料电池的阳极流体连通的阳极供应歧管，阳极 供应歧管，其提供氢源和阳极之间的流体连通，与燃料电池的阳极流体连通的阳极排气歧管以及与燃料电池的阳极流体连通的风扇，其中风扇控制 在燃料电池系统关闭之后通过燃料电池的阳极的流体。

公开(公告)号：US10522855B2

公开(公告)日：2019-12-31

申请号：US14886928

申请日：2015-10-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Thomas W. Tighe ,  Steven G. Goebel ,  Gary M. Robb ,  Abdullah B. Alp ,  Balasubramanian Lakshmanan ,  Joseph N. Lovria

IPC: H01M8/04223 ,  H01M8/04302 ,  H01M8/04303 ,  H01M8/04955 ,  H01M8/04089 ,  H01M8/0438 ,  H01M8/0444 ,  H01M8/04746 ,  H01M8/04791 ,  H01M8/04701 ,  H01M8/04119 ,  H01M8/04537

Abstract: A method for creating an oxygen depleted gas in a fuel cell system, including operating a fuel cell stack at a desired cathode stoichiometry at fuel cell system shutdown to displace a cathode exhaust gas with an oxygen depleted gas. The method further includes closing a cathode flow valve and turning off a compressor to stop the flow of cathode air.

公开(公告)号：US10446862B2

公开(公告)日：2019-10-15

申请号：US15589218

申请日：2017-05-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Srikanth Arisetty ,  Aaron R. Rogahn ,  Balasubramanian Lakshmanan

IPC: H01M8/04 ,  B60L3/12 ,  H01M8/04746 ,  H01M8/04302 ,  H01M8/0432 ,  H01M8/04992 ,  H01M8/04701 ,  B60L58/31 ,  B60L58/34

Abstract: Disclosed are fuel cell architectures, thermal sub-systems, and control logic for regulating fuel cell stack temperature. A method is disclosed for regulating the temperature of a fuel cell stack. The method includes determining a pre-start temperature of the fuel cell stack, and determining, for this pre-start temperature, a target heating rate to heat the stack to a calibrated minimum operating temperature. The method then determines a hydrogen bleed percentage for the target heating rate, and executes a stack heating operation including activating the fuel cell stack and commanding a fluid control device to direct hydrogen to the cathode side at the hydrogen bleed percentage to generate waste heat. After a calibrated period of time, the method determines if an operating temperature of the stack exceeds the calibrated minimum stack operating temperature. Responsive to the operating temperature being at or above the minimum operating temperature, the stack heating operation is terminated.

公开(公告)号：US20190252705A1

公开(公告)日：2019-08-15

申请号：US15897243

申请日：2018-02-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mark F. Mathias ,  Balasubramanian Lakshmanan ,  Swaminatha P. Kumaraguru ,  Scott C. Moose

IPC: H01M8/1004 ,  H01M8/04119 ,  H01M8/1081 ,  H01M8/1058 ,  H01M4/88

Abstract: The present disclosure provides a method for manufacturing an integrated MEA, the method includes the following steps: (1) providing a substrate having an AA region and a WVT region; (2) simultaneously coating a microporous layer, a catalyst layer, and a first membrane ionomer layer onto the substrate; (3) applying an optional membrane support layer to the first membrane ionomer layer in the AA region and the WVT region; (4) applying an optional second membrane ionomer layer; (5) heating treating a coated substrate; and (6) assembling the coated substrate to a companion coated substrate.

公开(公告)号：US20190058200A1

公开(公告)日：2019-02-21

申请号：US15678695

申请日：2017-08-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Smuruthi Kamepalli ,  Balasubramanian Lakshmanan

IPC: H01M8/021 ,  C23C16/46 ,  C23C16/455 ,  C23C16/52

Abstract: A method for manufacturing a coated metal substrate includes the steps of: (1) inserting a substrate with a chromium(III) oxide layer inside a CVD chamber; (2) heating the substrate to a temperature which falls in the range of 400 to 500 degrees Celsius; (3) transporting gaseous nitrogen (N2) and tantalum chloride (TaCl5) into the CVD chamber for at least two cycles; (4) ceasing the transportation of tantalum chloride (TaCl5) while nitrogen continues to flow from the inlet to the outlet; (5) reacting the tantalum chloride and the chromium(III) oxide and creating by-products; and (6) vacuuming the by-product matter from the CVD chamber via the flowing nitrogen gas.

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.