Patents by Inventor Kenshin Kitoh

Kenshin Kitoh 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: 11217784
    Abstract: Provided is a positive electrode structure for a secondary battery. This positive electrode structure includes: a positive electrode current collector composed of a tabular nickel foam and having a tabular coated portion and an uncoated portion extending from an outer peripheral portion of the coated portion; and a positive electrode active material containing nickel hydroxide and/or nickel oxyhydroxide incorporated into the coated portion of the positive electrode current collector. The positive electrode active material is not present in the uncoated portion of the positive electrode current collector, and the nickel foam constituting the uncoated portion is compressed so as to have a thickness of 0.10 times or more and less than 0.8 times a thickness of the nickel foam constituting the coated portion.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: January 4, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Junki Matsuya, Kenshin Kitoh, Takeshi Yagi
  • Patent number: 11158858
    Abstract: Provided is a positive electrode structure including: a positive electrode current collector composed of a tabular nickel foam and having a tabular coated portion and an uncoated portion extending from an outer peripheral portion of the coated portion; a positive electrode active material containing nickel hydroxide and/or nickel oxyhydroxide incorporated into the coated portion of the positive electrode current collector; and a nonwoven fabric made of a polymer material and covering the coated portion of the positive electrode current collector from both sides. The positive electrode active material is not present in the uncoated portion of the positive electrode current collector. The nonwoven fabric covers an entirety of the coated portion and extends from the outer peripheral portion of the coated portion to form a surplus region, and the surplus region is sealed so as to close all around the outer peripheral portion of the coated portion.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: October 26, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Junki Matsuya, Kenshin Kitoh, Takeshi Yagi
  • Publication number: 20210210764
    Abstract: Provided is a positive electrode structure including: a positive electrode current collector composed of a tabular nickel foam and having a tabular coated portion and an uncoated portion extending from an outer peripheral portion of the coated portion; a positive electrode active material containing nickel hydroxide and/or nickel oxyhydroxide incorporated into the coated portion of the positive electrode current collector; and a nonwoven fabric made of a polymer material and covering the coated portion of the positive electrode current collector from both sides. The positive electrode active material is not present in the uncoated portion of the positive electrode current collector. The nonwoven fabric covers an entirety of the coated portion and extends from the outer peripheral portion of the coated portion to form a surplus region, and the surplus region is sealed so as to close all around the outer peripheral portion of the coated portion.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 8, 2021
    Applicant: NGK INSULATORS, LTD.
    Inventors: Junki MATSUYA, Kenshin KITOH, Takeshi YAGI
  • Publication number: 20210194012
    Abstract: Provided is a positive electrode structure for a secondary battery. This positive electrode structure includes: a positive electrode current collector composed of a tabular nickel foam and having a tabular coated portion and an uncoated portion extending from an outer peripheral portion of the coated portion; and a positive electrode active material containing nickel hydroxide and/or nickel oxyhydroxide incorporated into the coated portion of the positive electrode current collector. The positive electrode active material is not present in the uncoated portion of the positive electrode current collector, and the nickel foam constituting the uncoated portion is compressed so as to have a thickness of 0.10 times or more and less than 0.8 times a thickness of the nickel foam constituting the coated portion.
    Type: Application
    Filed: March 3, 2021
    Publication date: June 24, 2021
    Applicant: NGK INSULATORS, LTD.
    Inventors: Junki MATSUYA, Kenshin KITOH, Takeshi YAGI
  • Patent number: 10903495
    Abstract: There is disclosed an electrode material for cells. The electrode material includes carbon, and a crystalline material composed of a layered double hydroxide and/or a cation-deficit metal oxide having a rock-salt structure. Carbon is complexed with the cation-deficit metal oxide and/or the layered double hydroxide.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: January 26, 2021
    Assignees: Nagoya Institute of Technology, NGK Insulators, Ltd.
    Inventors: Noriyuki Sonoyama, Tatsuya Hattori, Kenshin Kitoh
  • Patent number: 10790560
    Abstract: An air electrode has a plurality of carbon nanotubes and a plurality of layered double hydroxide particles. The plurality of layered double hydroxide particles is supported on the plurality of carbon nanotubes.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: September 29, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Tatsuya Hattori, Kenshin Kitoh
  • Patent number: 10734685
    Abstract: Provided is a highly reliable nickel-zinc battery including a separator exhibiting hydroxide ion conductivity and water impermeability. The nickel-zinc battery includes a positive electrode containing nickel hydroxide and/or nickel oxyhydroxide; a positive-electrode electrolytic solution in which the positive electrode is immersed, the electrolytic solution containing an alkali metal hydroxide; a negative electrode containing zinc and/or zinc oxide; a negative-electrode electrolytic solution in which the negative electrode is immersed, the electrolytic solution containing an alkali metal hydroxide; a hermetic container accommodating the positive electrode, the positive-electrode electrolytic solution, the negative electrode, and the negative-electrode electrolytic solution; and the separator exhibiting hydroxide ion conductivity and water impermeability and disposed in the hermetic container so as to separate a positive-electrode chamber from a negative-electrode chamber.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: August 4, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Hiroshi Hayashi, Naohito Yamada, Kenshin Kitoh
  • Publication number: 20200227773
    Abstract: There is provided a secondary zinc battery including: (a) at least one unit cell including; a positive electrode; a negative-electrode structure including a negative-electrode active material layer containing at least one selected from the group consisting of elemental zinc, zinc oxide, zinc alloys, and zinc compounds; a LDH separator including a porous substrate composed of a polymeric material and layered double hydroxide (LDH); and an electrolytic solution; and (b) a pressuring unit compacting the unit cell to bring the negative-electrode structure in close contact with the LDH separator. Pores of the porous substrate are filled with the LDH such that the LDH separator is hydroxide-ion-conductive and gas-impermeable. The LDH separator separates the positive electrode from the negative-electrode active material layer.
    Type: Application
    Filed: March 24, 2020
    Publication date: July 16, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Junki MATSUYA, Yuichi GONDA, Takeshi YAGI, Kenshin KITOH
  • Publication number: 20200220158
    Abstract: There is provided a secondary zinc battery including: a unit cell including; a positive-electrode plate including a positive-electrode active material layer and a positive-electrode collector; a negative-electrode plate including a negative-electrode active material layer containing zinc and a negative-electrode collector; a layered double hydroxide (LDH) separator covering or wrapping around the entire negative-electrode active material layer; and an electrolytic solution. The positive-electrode collector has a positive-electrode collector tab extending from one edge of the positive-electrode active material layer, and the negative-electrode collector has a negative-electrode collector tab extending from the opposite edge of the negative-electrode active material layer and beyond a vertical edge of the LDH separator. The unit cell can thereby collects electricity from the positive-electrode collector tab and the negative-electrode collector tab.
    Type: Application
    Filed: March 16, 2020
    Publication date: July 9, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Junki Matsuya, Yuichi Gonda, Takeshi Yagi, Kenshin Kitoh
  • Patent number: 10700328
    Abstract: The present invention provides a unit cell for a nickel-zinc battery in the form of a cell pack having positive and negative electrodes reliably separated by a hydroxide ion-conductive separator, which can be readily handled and is very advantageous for forming an assembled battery. The nickel-zinc cell pack of the invention includes: a flexible bag comprising flexible films; a separation sheet liquid-tightly connected to the interior of the flexible bag to separate a positive-electrode chamber and a negative-electrode chamber for inhibiting liquid communication therebetween; a positive electrode and a positive-electrode electrolytic solution disposed in the positive-electrode chamber; a negative electrode and a negative-electrode electrolytic solution disposed in the negative-electrode chamber, wherein the separation sheet comprises a separator structure comprising a separator exhibiting hydroxide-ion conductivity and water impermeability.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: June 30, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Yuichi Gonda, Kenshin Kitoh
  • Patent number: 10686177
    Abstract: There is disclosed an electrode cartridge for use in a hermetic zinc secondary battery comprising a separator structure including a separator exhibiting hydroxide ion conductivity and water impermeability; a counter member liquid-tightly sealed to the separator structure so as to form an internal space and constituting an open-top water impermeable case together with the separator structure; and an electrode that is accommodated in the internal space of the water impermeable case and is a negative electrode containing zinc and/or zinc oxide or a positive electrode. According to the present invention, there is provided an electrode built-in component that can reliably isolate the positive and negative electrodes from each other with a hydroxide ion conductive separator, in the form of an electrode cartridge that is easy to handle and manufacture and that is more advantageous for assembling a stacked-cell battery, while reducing the number of sealing joints.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: June 16, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Yuichi Gonda, Naohito Yamada, Kenshin Kitoh
  • Patent number: 10581114
    Abstract: Provided is a battery-equipped device including a substrate, a device disposed on the substrate, an all-solid-state battery disposed such that the planar shape conforms to the periphery of the device on the substrate and at least partially having a complementary outer edge shape that conforms to the entire or a part of the outer edge shape of the device, and interconnections connecting the device and the all-solid-state battery. The all-solid-state battery includes a positive electrode layer containing an oriented polycrystalline positive-electrode active material composed of lithium transition metal oxide particles oriented in a certain direction, a solid electrolyte layer composed of a lithium-ion conductive material, and a negative electrode layer containing a negative-electrode active material. The present invention can provide a battery-equipped device that can significantly increase the degree of freedom of design and can output necessary electric power in a minimum space.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: March 3, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Iwao Ohwada, Toshihiro Yoshida, Kenshin Kitoh
  • Patent number: 10522868
    Abstract: The present invention provides a sequential and efficient method of assembling a battery with a desired number of layers while reliably separating positive and negative electrode sides from each other with one or more separator structures. According to the invention, the method of assembling a battery includes stacking one or multiple combinations each comprising a frame and a positive electrode plate to be disposed in a region defined by the frame and one or multiple combinations each comprising a frame and a negative electrode plate to be disposed in a region defined by the frame, once or alternately, such that the positive and adjacent negative electrode plates are separated from each other by a separator structure and the periphery of the separator structure is held between the adjacent frames. The separator structure includes a separator exhibiting hydroxide ion conductivity and water impermeability.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: December 31, 2019
    Assignee: NGK INSULATORS, LTD.
    Inventors: Kenshin Kitoh, Naohito Yamada, Kenji Kawamura, Yuichi Gonda
  • Patent number: 10488316
    Abstract: In a particle counter and a method of counting a number of particles, the particle counter includes a casing made of a ceramic, an electric charge adder configured to add electric charges to particles in a measurement target gas supplied into the casing, a first electric charge collector configured to collect the electric charges added to the particles, and a number measuring unit configured to measure a number of the particles based on a quantity of the collected electric charges.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: November 26, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Kazuyuki Mizuno, Kenshin Kitoh
  • Patent number: 10483596
    Abstract: Provided is a secondary battery including a hydroxide-ion-conductive ceramic separator. The secondary battery includes a positive electrode; a negative electrode; an alkaline electrolytic solution; a ceramic separator that is composed of a hydroxide-ion-conductive inorganic solid electrolyte and separates the positive electrode from the negative electrode; a porous substrate disposed on at least one surface of the ceramic separator; and a container accommodating at least the negative electrode and the alkaline electrolytic solution, wherein the inorganic solid electrolyte is in the form of a membrane or layer densified enough to have water impermeability, and the porous substrate has a thickness of 100 to 1,800 ?m. According to the secondary battery of the present invention, the thickness and resistance of the ceramic separator are decreased without concern for reduced strength, and a reduction in energy density and an increase in internal resistance are effectively prevented.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: November 19, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Hiroshi Hayashi, Kenshin Kitoh, Naohito Yamada
  • Patent number: 10446821
    Abstract: Provided is a secondary battery including a positive electrode, a negative electrode, an alkaline electrolytic solution, a separator structure exhibiting water impermeability and separating the positive electrode from the negative electrode, and a container accommodating at least the negative electrode and the alkaline electrolytic solution. The separator structure includes a porous substrate-supported ceramic separator, and a reinforcement having a lattice structure having openings and reinforcing the periphery and/or at least one surface of the porous substrate-supported ceramic separator. The porous substrate-supported ceramic separator includes a ceramic separator composed of an inorganic solid electrolyte having hydroxide ion conductivity in the form of a membrane or layer densified enough to have water impermeability, and a porous substrate disposed on at least one surface of the separator.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: October 15, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Hiroshi Hayashi, Kenshin Kitoh, Naohito Yamada
  • Publication number: 20190267597
    Abstract: An electrode-separator assembly is provided that can drastically facilitate assembly of a LDH separator-equipped nickel-zinc battery without work, structure, or component for complete separation of a positive-electrode chamber from a negative-electrode chamber. The electrode-separator assembly includes a positive-electrode plate; a negative-electrode plate; a layered double hydroxide (LDH) separator for separation of the positive-electrode plate from the negative-electrode plate; and a resin frame having an opening to which the LDH separator and the positive-electrode plate are fitted or joined. The positive-electrode plate has a smaller face than the negative-electrode plate. The negative-electrode plate has a clearance area that does not overlap with the positive-electrode plate over a predetermined width from the outer peripheral edge of the negative-electrode plate.
    Type: Application
    Filed: May 8, 2019
    Publication date: August 29, 2019
    Inventors: Yuichi GONDA, Kenshin KITOH, Takeshi YAGI
  • Patent number: 10381689
    Abstract: Provided is a highly reliable nickel-zinc battery including a separator exhibiting hydroxide ion conductivity and water impermeability.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: August 13, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Hiroshi Hayashi, Naohito Yamada, Kenshin Kitoh
  • Publication number: 20190173132
    Abstract: Provided is a highly reliable nickel-zinc battery including a separator exhibiting hydroxide ion conductivity and water impermeability. The nickel-zinc battery includes a positive electrode containing nickel hydroxide and/or nickel oxyhydroxide; a positive-electrode electrolytic solution in which the positive electrode is immersed, the electrolytic solution containing an alkali metal hydroxide; a negative electrode containing zinc and/or zinc oxide; a negative-electrode electrolytic solution in which the negative electrode is immersed, the electrolytic solution containing an alkali metal hydroxide; a hermetic container accommodating the positive electrode, the positive-electrode electrolytic solution, the negative electrode, and the negative-electrode electrolytic solution; and the separator exhibiting hydroxide ion conductivity and water impermeability and disposed in the hermetic container so as to separate a positive-electrode chamber from a negative-electrode chamber.
    Type: Application
    Filed: February 7, 2019
    Publication date: June 6, 2019
    Applicant: NGK INSULATORS, LTD.
    Inventors: Hiroshi HAYASHI, Naohito YAMADA, Kenshin KITOH
  • Patent number: 10297869
    Abstract: Provided is a highly reliable nickel-zinc battery including a separator exhibiting hydroxide ion conductivity and water impermeability. The separator is disposed in a hermetic container to separate a positive-electrode chamber accommodating a positive electrode and a positive-electrode electrolyte from a negative-electrode chamber accommodating a negative electrode and a negative-electrode electrolyte. The positive-electrode chamber has an extra positive-electrode space having a volume that meets a variation in amount of water in association with reaction at the positive electrode during charge and discharge of the battery, and the negative-electrode chamber has an extra negative-electrode space having a volume meeting a variation in amount of water in association with reaction at the negative electrode during charge and discharge of the battery.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: May 21, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Hiroshi Hayashi, Naohito Yamada, Kenshin Kitoh