Patents by Inventor Tad Armstrong

Tad Armstrong has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11870121
    Abstract: A fuel cell column includes a stack of alternating fuel cells and interconnects, where the interconnects separate adjacent fuel cells in the stack and contain fuel and air channels which are configured to provide respective fuel and air to the fuel cells. a manifold plate containing a bottom inlet hole and a bottom outlet hole located in a bottom surface of the manifold plate, top outlet holes and top inlet holes formed in opposing sides of a top surface of the manifold plate, outlet channels fluidly connecting the top outlet holes to the bottom inlet hole, and inlet channels fluidly connecting the top inlet holes to the bottom outlet hole, and a mitigation structure configured to reduce stress applied to the stack due to at least one of a shape mismatch or coefficient of thermal expansion mismatch between the stack and the manifold plate.
    Type: Grant
    Filed: November 10, 2022
    Date of Patent: January 9, 2024
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Michael Gasda, Robert Hintz, Karanpal Bhangu, Siddharth Patel, Harald Herchen, Victor Silva, Thuy Thanh Muhl, Tyler Dawson, David Edmonston, Tad Armstrong
  • Patent number: 11786970
    Abstract: Methods for fabricating an interconnect for a fuel cell stack that include providing a protective layer over at least one surface of an interconnect formed by powder pressing pre-alloyed particles containing two or more metal elements and annealing the interconnect and the protective layer at elevated temperature to bond the protective layer to the at least one surface of the interconnect.
    Type: Grant
    Filed: July 8, 2022
    Date of Patent: October 17, 2023
    Assignee: BLOOM ENERGY CORPORATION
    Inventor: Tad Armstrong
  • Patent number: 11742495
    Abstract: A solid oxide electrochemical cell includes a solid oxide electrolyte, an anode located on a first side of the solid oxide electrolyte, and a cathode located on a second side of the solid oxide electrolyte. The cathode includes lanthanum nickel ferrite.
    Type: Grant
    Filed: November 4, 2022
    Date of Patent: August 29, 2023
    Assignee: BLOOM ENERGY CORPORATION
    Inventor: Tad Armstrong
  • Publication number: 20230268519
    Abstract: A method of making an interconnect for a fuel cell stack includes compressing an interconnect powder to form an interconnect, the interconnect power containing Cr, Fe and at least one transition metal selected from Co, Cu, Mn, Ni, or V pre-alloyed with at least one of the Cr and the Fe, and sintering the interconnect.
    Type: Application
    Filed: February 10, 2023
    Publication date: August 24, 2023
    Inventors: Vijay RADHAKRISHNAN, Tad ARMSTRONG, Mosur K. PREMKUMAR
  • Publication number: 20230223555
    Abstract: Techniques for fabricating a solid oxide electrolyzer cell (SOEC) including sintering an electrolyte, printing a fuel-side electrode disposed on a fuel side of the electrolyte, printing an air-side electrode disposed on an air side of the electrolyte, first sintering a combination of the electrolyte, fuel-side electrode, and air-side electrode, printing a barrier layer an air side of the electrolyte, printing a functional layer on the barrier layer, printing a collector layer on the functional layer, and second sintering a combination of the electrolyte, fuel-side electrode, air-side electrode, barrier layer, functional layer, and collector layer.
    Type: Application
    Filed: January 10, 2023
    Publication date: July 13, 2023
    Inventors: Tad ARMSTRONG, Justin RAILSBACK
  • Patent number: 11664521
    Abstract: A fuel cell system column includes a first terminal plate connected to a first electrical output of the column, a second terminal plate connected to a second electrical output of the column, at least one first fuel cell stack located in a middle portion of the column between the first terminal plate and the second terminal plate, and at least one electrical connection which is electrically connected to the middle portion of the column and which is configured to provide a more uniform fuel utilization across the first column.
    Type: Grant
    Filed: February 12, 2021
    Date of Patent: May 30, 2023
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Tad Armstrong, Harald Herchen, David Weingaertner, Rajan Surve, Matthias Gottmann, Prasad Pmsvvsv, Ranganathan Gurunathan, Arne Ballantine, Michael Gasda, Tyler Dawson, Chockkalingam Karuppaiah
  • Publication number: 20230155143
    Abstract: A fuel cell interconnect includes fuel ribs disposed on a first side of the interconnect and a least partially defining fuel channels, and air ribs disposed on an opposing second side of the interconnect and at least partially defining air channels. The fuel channels include central fuel channels disposed in a central fuel field and peripheral fuel channels disposed in peripheral fuel fields disposed on opposing sides of the central fuel field. The air channels include central air channels disposed in a central air field and peripheral air channels disposed in peripheral air fields disposed on opposing sides of the central air field. At least one of the central fuel channels or the central air channels has at least one of a different cross-sectional area or length than at least one of the respective peripheral fuel channels or the respective peripheral air channels.
    Type: Application
    Filed: November 8, 2022
    Publication date: May 18, 2023
    Inventors: Michael GASDA, Cheng-Yu LIN, Ling-Hsiang CHEN, Harald HERCHEN, Ian RUSSELL, Tad ARMSTRONG
  • Publication number: 20230155157
    Abstract: A fuel cell column includes a stack of alternating fuel cells and interconnects, where the interconnects separate adjacent fuel cells in the stack and contain fuel and air channels which are configured to provide respective fuel and air to the fuel cells. a manifold plate containing a bottom inlet hole and a bottom outlet hole located in a bottom surface of the manifold plate, top outlet holes and top inlet holes formed in opposing sides of a top surface of the manifold plate, outlet channels fluidly connecting the top outlet holes to the bottom inlet hole, and inlet channels fluidly connecting the top inlet holes to the bottom outlet hole, and a mitigation structure configured to reduce stress applied to the stack due to at least one of a shape mismatch or coefficient of thermal expansion mismatch between the stack and the manifold plate.
    Type: Application
    Filed: November 10, 2022
    Publication date: May 18, 2023
    Inventors: Michael GASDA, Robert HINTZ, Karanpal BHANGU, Siddharth PATEL, Harald HERCHEN, Victor SILVA, Thuy Thanh MUHL, Tyler DAWSON, David EDMONSTON, Tad ARMSTRONG
  • Publication number: 20230141938
    Abstract: A solid oxide electrolyzer cell (SOEC) includes a solid oxide electrolyte, a fuel-side electrode disposed on a fuel side of the electrolyte, and an air-side electrode disposed on an air side of the electrolyte. The air-side electrode includes a barrier layer disposed on the air side of the electrolyte and including a first doped ceria material, and a functional layer disposed on the barrier layer and including an electrically conductive material and a second doped ceria material.
    Type: Application
    Filed: November 5, 2021
    Publication date: May 11, 2023
    Inventors: Tad ARMSTRONG, Justin RAILSBACK
  • Publication number: 20230144742
    Abstract: A solid oxide electrochemical cell includes a solid oxide electrolyte, an anode located on a first side of the solid oxide electrolyte, and a cathode located on a second side of the solid oxide electrolyte. The cathode includes lanthanum nickel ferrite.
    Type: Application
    Filed: November 4, 2022
    Publication date: May 11, 2023
    Inventor: Tad ARMSTRONG
  • Publication number: 20220344676
    Abstract: Methods for fabricating an interconnect for a fuel cell stack that include providing a protective layer over at least one surface of an interconnect formed by powder pressing pre-alloyed particles containing two or more metal elements and annealing the interconnect and the protective layer at elevated temperature to bond the protective layer to the at least one surface of the interconnect.
    Type: Application
    Filed: July 8, 2022
    Publication date: October 27, 2022
    Inventor: Tad Armstrong
  • Patent number: 11456464
    Abstract: A method of making an interconnect for a solid oxide fuel cell stack includes contacting an interconnect powder located in a die cavity with iron, the interconnect powder including a chromium and iron, compressing the interconnect powder to form an interconnect having ribs and fuel channels on a first side of the interconnect, such that the iron is disposed on tips of the ribs; and sintering the interconnect, such that the iron forms an contact layer on the tips of the ribs having a higher iron concentration than a remainder of the interconnect. A glass containing cathode contact layer having a glass transition temperature of 900° C. or less may be located over the rib tips on the oxidant side of the interconnect.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: September 27, 2022
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Sanchit Khurana, Tad Armstrong, Harald Herchen, Emily Wong, Cheng-Yu Lin
  • Patent number: 11417894
    Abstract: Methods for fabricating an interconnect for a fuel cell stack that include providing a protective layer over at least one surface of an interconnect formed by powder pressing pre-alloyed particles containing two or more metal elements and annealing the interconnect and the protective layer at elevated temperature to bond the protective layer to the at least one surface of the interconnect.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: August 16, 2022
    Assignee: BLOOM ENERGY CORPORATION
    Inventor: Tad Armstrong
  • Publication number: 20220231308
    Abstract: Systems, devices, and methods that utilize a method of coating an interconnect for a SOEC or SOFC, the method including wet spraying a coating precursor powder onto an interconnect, and sintering the interconnect in an oxidizing ambient to form the coating.
    Type: Application
    Filed: January 19, 2022
    Publication date: July 21, 2022
    Inventors: Tad Armstrong, Sanchit Khurana, Zigui Lu
  • Publication number: 20220190373
    Abstract: A solid oxide electrolyzer cell (SOEC) includes a solid oxide electrolyte, a fuel-side electrode disposed on a fuel side of the electrolyte, and an air-side electrode disposed on an air side of the electrolyte. The air-side electrode includes a barrier layer disposed on the air side of the electrolyte and containing a stabilized zirconia material having a lower electrical conductivity than an electrical conductivity of the electrolyte, and a functional layer disposed on the barrier layer.
    Type: Application
    Filed: December 14, 2020
    Publication date: June 16, 2022
    Inventor: Tad ARMSTRONG
  • Patent number: 11335914
    Abstract: A method of making an interconnect for a solid oxide fuel cell stack includes providing an iron rich material containing at least 25 wt. % iron into channels of a mold, providing a powder containing 4-6 wt. % Fe, 0-1 wt. % Y and balance Cr into the mold over the iron rich material containing at least 25 wt. % iron, compacting the iron rich material containing at least 25 wt. % iron and the powder comprising 4-6 wt. % Fe, 0-1 wt. % Y and balance Cr in the mold to form the interconnect, and sintering the interconnect to form a sintered interconnect having iron rich regions having an iron concentration greater than 10% in ribs of the interconnect.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: May 17, 2022
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Harald Herchen, Cheng-Yu Lin, Tad Armstrong
  • Publication number: 20210359324
    Abstract: A solid oxide electrolyzer electrolyte composition includes a scandia and ceria stabilized zirconia, containing 5 to 12 mol % scandia, 1 to 7 mol % ceria, and 80 to 94 mol % zirconia, or a yttria and ceria stabilized zirconia containing 3 to 10 mol % yttria, 1 to 6 mol % ceria, and 84 to 96 mol % zirconia.
    Type: Application
    Filed: May 12, 2021
    Publication date: November 18, 2021
    Inventor: Tad ARMSTRONG
  • Publication number: 20210257645
    Abstract: A fuel cell system column includes a first terminal plate connected to a first electrical output of the column, a second terminal plate connected to a second electrical output of the column, at least one first fuel cell stack located in a middle portion of the column between the first terminal plate and the second terminal plate, and at least one electrical connection which is electrically connected to the middle portion of the column and which is configured to provide a more uniform fuel utilization across the first column.
    Type: Application
    Filed: February 12, 2021
    Publication date: August 19, 2021
    Inventors: Tad ARMSTRONG, Harald HERCHEN, David WEINGAERTNER, Rajan SURVE, Matthias GOTTMANN, Prasad PMSVVSV, Ranganathan GURUNATHAN, Arne BALLANTINE, Michael GASDA, Tyler DAWSON, Chockkalingam KARUPPAIAH
  • Patent number: 10978726
    Abstract: A solid oxide fuel cell (SOFC) electrolyte composition includes zirconia stabilized with scandia, and at least one of magnesia, zinc oxide, indium oxide, and gallium oxide, and optionally ceria in addition to the oxides above.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: April 13, 2021
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: David N. Miller, Cristian Savaniu, John T S Irvine, Tad Armstrong
  • Patent number: 10950875
    Abstract: A solid oxide fuel cell system and method, the system including a hotbox containing a fuel cell stack, a fuel supply configured to provide a fuel to the fuel cell stack, and a blower configured to provide air to the fuel cell stack. During a shutdown operation, the blower is configured to cool the fuel cell stack at a rate ranging from about 0.75° C./min to about 3.0° C./min, until the temperature of the fuel cell stack is reduced to a temperature at which oxidation of anodes of the fuel cell stack is substantially prevented.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: March 16, 2021
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Vijay Radhakrishnan, Manoj Pillai, Tad Armstrong, Padiadpu Shankara Anantha