Patents Assigned to Energy Conversion Devices, Inc.
  • Patent number: 6447942
    Abstract: A fuel cell which has the ability to start up instantly and can accept recaptured energy such as that of regenerative braking by operating in reverse as an electrolyzer. The instant startup fuel cells have increased efficiency and power availability (higher voltage and current) and a dramatic improvement in operating temperature range of about −20 to 150° C.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: September 10, 2002
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Srinivasan Venkatesan, Boyko Aladjov, Rosa T. Young, Thomas Hopper
  • Patent number: 6425251
    Abstract: A hydrogen gas cooled hydrogen storage element which includes a hydrogen storage alloy material in which hydrogen flow channels are provided. The flow channels provide pathways through the hydrogen storage material to allow for high speed hydrogen gas flow. A portion of the high speed hydrogen flow is stored within the storage material which releases its heat of hydride formation. The remainder of the hydrogen flows through the hydrogen storage material at a sufficient mass flow rate to remove the heat of hydride formation.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: July 30, 2002
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Ned T. Stetson, Subramanian Ramachandran
  • Patent number: 6378601
    Abstract: A hydrogen cooled hydrogen storage unit. The unit employs excess hydrogen flow between hydrogen storage alloy rods in the hydrogen storage unit in order to provide convective cooling thereof. The unit provides for high packing density of the storage materials. The unit also allows for efficient thermal transfer of heat energy from a central source of heat through the rods thereof during discharge of the stored hydrogen. The hydrogen storage rods of the unit are encased in an encapsulant layer which prevents entrainment of the hydrogen storage material in the high flow rate hydrogen.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: April 30, 2002
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Rosa T. Young
  • Patent number: 6340376
    Abstract: A method for combining a first metal with a second metal where the melting point of the second metal is higher than the melting point of the first metal. The first and second metals are melted in separate crucibles. The second molten metal is introduced onto or into the first molten metal. Also described is a two-zone furnace for carrying out the method.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: January 22, 2002
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Krishna Sapru, Subramanian Ramachandran, Lu Ming
  • Patent number: 6328821
    Abstract: A magnesium based hydrogen storage alloy powder which is useful as a hydrogen supply material for powering internal combustion engine or fuel cell vehicles. The alloy contains greater than about 85 atomic percent magnesium, about 2-8 atomic percent nickel, about 0.5-5 atomic percent aluminum and about 2-7 atomic percent rare earth metals or mixtures of rare earth metals. The rare earth elements may be Misch metal and may predominantly contain Ce and/or La. The alloy may also contain about 0.5-5 atomic percent silicon. The alloys can be modified to store more than 4 wt. % hydrogen, with a reduced hydride bond strength (i.e. about 64 kJ/mole) which allows for economic recovery of the stored hydrogen. Also, they have a plateau pressure about two times greater than pure Mg and comparable bond energies and plateau pressures to Mg2Ni alloys, while reducing the amount of incorporated nickel by 25-30 atomic %. Also, the storage capacity of the alloy is significantly greater than the 3.6 wt. % of Mg2Ni material.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: December 11, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Rosa T. Young
  • Patent number: 6318453
    Abstract: A hydrogen cooled hydrogen storage unit which employs excess hydrogen flow through flow channels between hydrogen storage alloy plates in order to provide convective cooling of the plates. The unit provides for high packing density of the storage materials and ease of expansion of storage capacity by merely adding more storage material plates. Since the hydrogen flows transversely between the plates and does not flow along the entire length of the stack, the cooling flow path of the hydrogen is short, and the temperature differential between any point of the stack and the hydrogen coolant is maximized, which maximizes the cooling efficiency of the unit.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: November 20, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Rosa T. Young
  • Patent number: 6305442
    Abstract: A complete infrastructure system for the generation, storage, transportation, and delivery of hydrogen which makes a hydrogen ecosystem possible. The infrastructure system utilizes high capacity, low cost, light weight thermal hydrogen storage alloy materials having fast kinetics. Also, a novel hydrogen storage bed design which includes a support/heat-transfer component which is made from a highly porous, high thermal conductivity, solid material such as a high thermal conductivity graphitic foam. Finally a material including at least one particle having atomically engineered local chemical and electronic environments, characterized in that the local environments providing bulk nucleation.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: October 23, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Rosa T. Young
  • Patent number: 6293110
    Abstract: A hydrogen gas cooled hydrogen storage element which includes a hydrogen storage alloy material in which hydrogen flow channels are provided. The flow channels provide pathways through the hydrogen storage material to allow for high speed hydrogen gas flow. A portion of the high speed hydrogen flow is stored within the storage material which releases its heat of hydride formation. The remainder of the hydrogen flows through the hydrogen storage material at a sufficient mass flow rate to remove the heat of hydride formation.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: September 25, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Ned T. Stetson, Subramanian Ramachandran
  • Patent number: 6245280
    Abstract: A method and apparatus for forming polycrystalline particles by gas phase condensation employing arc plasma evaporation. The disclosed method and apparatus may be employed to form polycrystalline particles from high-melting temperature, low evaporation pressure materials such as transition metals. Arc discharge is sustained by the evaporated species, therefore, there is no need for a plasma sustaining gas. Evaporation may be sustained from either the cathode or anode. A reaction gas may be provided to form products with the evaporated species.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: June 12, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Zhaosheng Tan, Krishna Sapru
  • Patent number: 6210498
    Abstract: Reversible hydrogen storage alloys and methods and electrodes formed therefrom for nickel metal hydride batteries, in which the alloys are quenched from a melt at cooling rates selected to provide a high degree of disorder with an optimum local environment.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: April 3, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Rosa T. Young, Benjamin Chao
  • Patent number: 6209482
    Abstract: A microwave apparatus for sustaining a substantially uniform plasma over a relatively large area. The microwave apparatus comprises a vacuum vessel for sustaining the plasma in a plasma region thereof. The apparatus further comprises a nonevanescent microwave applicator having means for controlling the cutoff frequency thereof. The microwave applicator may comprise a waveguide and a volume of dielectric material disposed within the waveguide. Alternately, the microwave applicator may comprise ridge waveguide.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: April 3, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventor: Joachim Doehler
  • Patent number: 6193929
    Abstract: Hydrogen propelled vehicles and fundamentally new magnesium-based hydrogen storage alloy materials which for the first time make it feasible and practical to use solid state storage and delivery of hydrogen to power internal combustion engine or fuel cell vehicles. These exceptional alloys have remarkable hydrogen storage capacity of well over 6 weight % coupled with extraordinary absorption kinetics such that the alloy powder absorbs 80% of its total capacity within 2 minutes at 300° C.
    Type: Grant
    Filed: November 6, 1999
    Date of Patent: February 27, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Rosa T. Young
  • Patent number: 6186090
    Abstract: Apparatus and method for the vacuum deposition of at least two different layers of thin film material onto a substrate by two different vacuum deposition processes. Also disclosed is a novel linear applicator for using microwave enhanced CVD to uniformly deposit a thin film of material over an elongated substrate.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: February 13, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Buddy R. Dotter, II, Joachim Doehler, Timothy Ellison, Masatsugo Izu, Herbert C. Ovshinsky
  • Patent number: 6177213
    Abstract: A composite positive electrode material for use in electrochemical cells. The composite material may comprise a particle of positive electrode material, and a conductive material at least partially embedded within the particle of positive electrode material. The material may comprise a particle of positive electrode material, and a nucleating particle at least partially embedded therein.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: January 23, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Michael A. Fetcenko, Christian Fierro, Stanford R. Ovshinsky, Beth Sommers, Benjamin Reichman, Kwo Young, William Mays
  • Patent number: 6171726
    Abstract: An active composition for an electrode of an electrochemical cell. The active composition comprises an electrode material, and a nonfibrillating polymeric binder. The polymeric binder may comprise a fluoradditive. Also disclosed in an electrode and an electrochemical cell comprising the active composition.
    Type: Grant
    Filed: December 24, 1998
    Date of Patent: January 9, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Benjamin Reichman, William Mays, Michael A. Fetcenko
  • Patent number: 6143373
    Abstract: A process for fabricating synthetic materials by atomic alloying of a host material. Energetic high vapor pressure modifier elements or species are introduced into the host matrix of a fluidic precursor high metling point material so as to obtain an engineered material characterized by a range of controllable optical electrical, thermal, chemical or mechanical properties not exhibited by either the modifier or the precursor material. The method for forming a synthetically engineered material by forming a fluid host matrix material on a moving substrate surface, such as a wheel; directing a plurality of discrete fluid modifier materials, activated or unactivated, in a stream, as from a nozzle, toward the substrate surface in a direction such that it converges with the host matrix material to produce a ribbon of modified material.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: November 7, 2000
    Assignee: Energy Conversion Devices, Inc.
    Inventor: Stanford R. Ovshinsky
  • Patent number: 6141241
    Abstract: A universal memory element having multi-level, non-detectable states and methods and apparatus for programming the same, and methods and applications embodying the same in neural networks, artificial intelligence and data storage systems. The universal memory element is programmed by applying one or more sub-interval energy pulses insufficient to switch the memory element from said high resistance state to said low resistance state, but sufficient to modify the memory material such that accumulation of additional energy pulses causes the memory element to switch from said high resistance state to said low resistance state.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: October 31, 2000
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Boil Pashmakov
  • Patent number: 6103024
    Abstract: A mechanically alloyed hydrogen storage material having 75-95 atomic percent Mg, 5-15 atomic percent Ni, 0.5-6 atomic percent Mo, and at least one additional element selected from the group consisting of Al, C, Ca, Ce, Co, Cr, Cu, Dy, Fe, La, Mn, Nd, Si, Ti, V, and Zr, preferably between 1-15 atomic %. The mechanically alloyed hydrogen storage preferably contains from 3-15 atomic % C and at least one other element selected from the group consisting of Al, Ca, Ce, Cu, Dy, Fe, La, Mn, and Nd. The hydrogen storage materials are created by mechanical alloying in a milling apparatus under an inert atmosphere, such as argon, or a mixed atmosphere, such as argon and hydrogen. The speed and length of the milling are varied.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: August 15, 2000
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Krishna Sapru, Lu Ming, Ned T. Stetson
  • Patent number: 6099811
    Abstract: A self-heating metal-hydride hydrogen storage system comprising: a primary metal-hydride storage container housing a metal-hydride hydrogen storage material, the primary storage container having a hydrogen outlet port; a hydrogen combustor housed within the primary metal-hydride storage container and surrounded by the high-temperature storage material, the combustor having a hydrogen inlet port gaseously connected to the hydrogen outlet port of the primary storage container; and means for supplying hydrogen gaseously connected to the hydrogen inlet port of the combustor.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: August 8, 2000
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Ned T. Stetson, Krishna Sapru, Heidi Van Kirk
  • Patent number: RE37259
    Abstract: An electrically operated, directly overwritable, multibit, single-cell chalcogenide memory element with multibit storage capabilities and having at least one contact for supplying electrical input signals to set the memory element to a selected resistance value, the second contact tapering to a peak adjacent to the memory element. In this manner the tapered contact helps define the size and position of a conduction path through the memory element.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: July 3, 2001
    Assignee: Energy Conversion Devices, Inc.
    Inventor: Stanford R. Ovshinsky