Patents by Inventor Koji Kawamoto

Koji Kawamoto 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: 9893386
    Abstract: The invention provides a solid secondary battery system including a solid secondary battery having a cathode active material layer, an anode active material layer, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer, and an overdischarge processing unit for discharging the solid secondary battery until a SOC of the solid secondary battery becomes less than 0%.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: February 13, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigenori Hama, Koji Kawamoto, Masashi Kodama
  • Patent number: 9537174
    Abstract: A sulfide solid electrolyte with excellent ion conductivity and a method for producing a crystallized glass contained in the sulfide solid electrolyte. A sulfide solid electrolyte comprising a crystallized glass represented by the following chemical formula yLi2S•(100-x-y)P2S5•xP2O5, wherein 0<x<25 and 67<y<80.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: January 3, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahiro Tatsumisago, Akitoshi Hayashi, Shigenori Hama, Koji Kawamoto, Takamasa Ohtomo
  • Patent number: 9531033
    Abstract: A lithium secondary battery (10) provided by the present invention includes a current interruption mechanism (40) operated by a rise in internal pressure. A positive electrode (32) of this battery (10) has a positive electrode mixture layer containing lithium carbonate, a conductive material and a positive electrode active material consisting primarily of a lithium-transition metal oxide. The lithium carbonate is disposed on the surface of the conductive material. Such a positive electrode mixture layer can preferably be fabricated using a positive electrode mixture composition containing a positive electrode active material and a composite conductive material comprising lithium carbonate retained on the surface of a conductive material.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: December 27, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Koji Takahata, Koji Kawamoto, Kazuhisa Takeda
  • Patent number: 9484597
    Abstract: A sulfide solid electrolyte material contains glass ceramics that contains Li, A, X, and S, and has peaks at 2?=20.2° and 23.6° in X-ray diffraction measurement with CuK? line. A is at least one kind of P, Si, Ge, Al, and B, and X is a halogen. A method for producing a sulfide solid electrolyte material includes amorphizing a raw material composition containing Li2S, a sulfide of A, and LiX to synthesize sulfide glass, and heating the sulfide glass at a heat treatment temperature equal to or more than a crystallization temperature thereof to synthesize glass ceramics having peaks at 2?=20.2° and 23.6° in X-ray diffraction measurement with CuK? line, in which a ratio of the LiX contained in the raw material composition and the heat treatment temperature are controlled to obtain the glass ceramics.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: November 1, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takamasa Ohtomo, Koji Kawamoto, Shigenori Hama, Yuki Kato
  • Patent number: 9484596
    Abstract: The object of the present invention is to provide a battery system in which reductive decomposition of a Ge-containing solid electrolyte material is restricted. The present invention attains the object by providing a battery system including a battery and a control apparatus, wherein the battery has a cathode active material layer containing a cathode active material, an anode active material layer containing a Si-containing anode active material, and an electrolyte layer formed between the cathode active material layer and the anode active material layer, at least one of the anode active material layer and the electrolyte layer contains a Ge-containing solid electrolyte material, and the control apparatus is an apparatus to control an electric potential of the Si-containing anode active material so as to be reduction potential or less of the Ge-containing solid electrolyte material.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: November 1, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takamasa Otomo, Koji Kawamoto, Yuki Kato
  • Patent number: 9413034
    Abstract: Provided is a method for manufacturing a solid battery by which a high-power solid battery can be manufactured. The present invention is a method for manufacturing a solid battery having a pair of electrode layers, and a solid electrolyte layer disposed between the pair of electrode layers, the method including a preparing step to prepare a foil-electrolyte laminated body having a foil and a solid electrolyte layer which contains a binder and is disposed on at least one face of the foil, an electrode layer forming step to form an electrode layer by laminating an electrode material on a surface of the solid electrolyte layer of the foil-electrolyte laminated body prepared by the preparing step and pressing them, and a foil removing step to remove the foil after the electrode layer forming step.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: August 9, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigenori Hama, Shiyo Tadokoro, Koji Kawamoto
  • Patent number: 9409548
    Abstract: The present invention relates to a detection device 100 for a vehicle, which can prevent damage to the vehicle by detecting occurrence of abnormality before the vehicle is damaged, and can accurately detect abnormality inside and outside the vehicle. The detection device 100 for a vehicle of the present invention includes: a transmission antenna 1, installed inside a vehicle 50, for transmitting a radio wave; reception antennae 2, 3, 4, and 5, installed inside the vehicle 50, for receiving the radio wave; and an abnormality detection calculation section 6 that calculates a spatial feature amount P(t) based on the radio wave received by each of the reception antennae 2, 3, 4, and 5, and detects, based on the calculated spatial feature amount P(t), a motion of a person outside the vehicle 50 and a motion of a person intruding into the vehicle 50.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: August 9, 2016
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Koji Kawamoto
  • Patent number: 9397365
    Abstract: A solid electrolyte material for an all solid-state lithium secondary battery represented by Li2S-MIaSb-MIIxOy, wherein MI is selected from P, Si, Ge, B and Al; “a” and “b” respectively represent numbers that give a stoichiometric ratio in accordance with the kind of MI; MII is selected from Fe, Zn and Bi; and “x” and “y” respectively represent numbers that give a stoichiometric ratio in accordance with the kind of MII.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: July 19, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahiro Tatsumisago, Akitoshi Hayashi, Shigenori Hama, Koji Kawamoto, Takamasu Ohtomo
  • Patent number: 9356315
    Abstract: The main object of the present invention is to provide a sulfide solid electrolyte material with high Li ion conductivity. The present invention solves the problem by providing a sulfide solid electrolyte material comprising an ion conductor with an ortho-composition, and LiI, characterized in that the sulfide solid electrolyte material is glass with a glass transition point.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: May 31, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takamasa Ohtomo, Koji Kawamoto, Shigenori Hama, Yasushi Tsuchida, Yuki Kato
  • Patent number: 9300011
    Abstract: A solid state electrolyte layer includes a sulfide solid state electrolyte material that is manufactured from a raw material composition containing Li2S and P2S5 and is substantially free of bridging sulfur, and a hydrophobic polymer for binding the sulfide solid state electrolyte material.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: March 29, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigenori Hama, Koji Kawamoto, Satoshi Wakasugi
  • Patent number: 9263763
    Abstract: The object of the present invention is to provide a sulfide solid electrolyte material with favorable ion conductivity. The present invention attains the object by providing a sulfide solid electrolyte material including an M1 element (such as a Li element), an M2 element (such as a Ge element and a P element), a S element and an O element, and having a peak at a position of 2?=29.58°±0.50° in an X-ray diffraction measurement using a CuK? ray, characterized in that when a diffraction intensity at the peak of 2?=29.58°±0.50° is regarded as IA and a diffraction intensity at a peak of 2?=27.33°±0.50° is regarded as IB, a value of IB/IA is less than 0.50.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: February 16, 2016
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Masaaki Hirayama, Ryoji Kanno, Yuki Kato, Koji Kawamoto, Takamasa Otomo
  • Publication number: 20160028109
    Abstract: The main object of the present invention is to provide a sulfide solid electrolyte material with high Li ion conductivity. The present invention solves the problem by providing a sulfide solid electrolyte material comprising an ion conductor with an ortho-composition, and LiI, characterized in that the sulfide solid electrolyte material is glass with a glass transition point.
    Type: Application
    Filed: October 6, 2015
    Publication date: January 28, 2016
    Inventors: Takamasa OHTOMO, Koji KAWAMOTO, Shigenori HAMA, Yasushi TSUCHIDA, Yuki KATO
  • Publication number: 20150357675
    Abstract: A sulfide solid electrolyte material contains glass ceramics that contains Li, A, X, and S, and has peaks at 2?=20.2° and 23.6° in X-ray diffraction measurement with CuK? line. A is at least one kind of P, Si, Ge, Al, and B, and X is a halogen. A method for producing a sulfide solid electrolyte material includes amorphizing a raw material composition containing Li2S, a sulfide of A, and LiX to synthesize sulfide glass, and heating the sulfide glass at a heat treatment temperature equal to or more than a crystallization temperature thereof to synthesize glass ceramics having peaks at 2?=20.2° and 23.6° in X-ray diffraction measurement with CuK? line, in which a ratio of the LiX contained in the raw material composition and the heat treatment temperature are controlled to obtain the glass ceramics.
    Type: Application
    Filed: August 21, 2015
    Publication date: December 10, 2015
    Inventors: Takamasa OHTOMO, Koji KAWAMOTO, Shigenori HAMA, Yuki KATO
  • Patent number: 9196932
    Abstract: An assembled battery (10) provided by this invention has a plurality of secondary batteries (2) connected in series, and has a first bypass circuit (12) including a Zener diode (6) connected in parallel so that the connection is in the inverse direction during charging with respect to the series connections, and a second bypass circuit (14) including a varistor (4) connected in parallel to the secondary batteries (2) and the Zener diode (6). The Zener voltage of the Zener diode (6) is set to a prescribed first voltage value, and the varistor voltage of the varistor (4) is set to a second voltage value equal to or greater than the first voltage value.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: November 24, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoyoshi Ueki, Koji Kawamoto
  • Publication number: 20150334299
    Abstract: A monitoring system includes a stationary camera, an omni-directional camera, and image processing apparatus and a display unit. The stationary camera captures an image in a predetermined imaging range. The omni-directional camera captures an image in an omni-directional imaging area including the predetermined imaging range. The image processing apparatus detects a predetermined event in first image data generated from the image in the predetermined imaging range captured by the stationary camera. In a case where the predetermined event is detected in the predetermined imaging range of the first image data, the display unit displays the first image data and second image data generated from the image in the omni-directional imaging area captured by the omni-directional camera and includes the predetermined imaging range from which the predetermined event is detected.
    Type: Application
    Filed: May 14, 2014
    Publication date: November 19, 2015
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masashige TSUNENO, Koji KAWAMOTO
  • Patent number: 9172112
    Abstract: An object of the present invention is to provide a sulfide solid electrolyte glass with high Li ion conductivity. The present invention achieves the above-mentioned object by providing a sulfide solid electrolyte glass comprising Li4P2S6, characterized by having a glass transition point.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: October 27, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigenori Hama, Takamasa Ohtomo, Yuki Kato, Koji Kawamoto
  • Patent number: 9172113
    Abstract: A sulfide solid electrolyte material contains glass ceramics that contains Li, A, X, and S, and has peaks at 2?=20.2° and 23.6° in X-ray diffraction measurement with CuK? line. A is at least one kind of P, Si, Ge, Al, and B, and X is a halogen. A method for producing a sulfide solid electrolyte material includes amorphizing a raw material composition containing Li2S, a sulfide of A, and LiX to synthesize sulfide glass, and heating the sulfide glass at a heat treatment temperature equal to or more than a crystallization temperature thereof to synthesize glass ceramics having peaks at 2?=20.2° and 23.6° in X-ray diffraction measurement with CuK? line, in which a ratio of the LiX contained in the raw material composition and the heat treatment temperature are controlled to obtain the glass ceramics.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: October 27, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takamasa Ohtomo, Koji Kawamoto, Shigenori Hama, Yuki Kato
  • Patent number: 9160034
    Abstract: A method for producing a sulfide solid electrolyte material having a small amount of hydrogen sulfide generation and a high Li ion conductivity. To achieve the above, a method for producing a sulfide solid electrolyte material is provided, including steps of: a providing step for providing a crystallized sulfide solid electrolyte material prepared by using a raw material composition containing Li2S and P2S5; and an amorphizing step for applying amorphization treatment to the crystallized sulfide solid electrolyte material.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: October 13, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuki Kato, Koji Kawamoto, Shigenori Hama, Takamasa Otomo
  • Publication number: 20150249266
    Abstract: The main object of the present invention is to provide a sulfide solid electrolyte material with less hydrogen sulfide generation amount. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material using a raw material composition containing Li2S and sulfide of an element of the group 14 or the group 15 in the periodic table, containing substantially no cross-linking sulfur and Li2S.
    Type: Application
    Filed: May 12, 2015
    Publication date: September 3, 2015
    Inventors: Masahiro TATSUMISAGO, Akitoshi HAYASHI, Shigenori HAMA, Koji KAWAMOTO, Yasushi TSUCHIDA, Hiroshi NAGASE, Yukiyoshi UENO, Masato KAMIYA
  • Publication number: 20150244024
    Abstract: The main object of the present invention is to provide a sulfide solid electrolyte material with less hydrogen sulfide generation amount. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material using a raw material composition containing Li2S and sulfide of an element of the group 14 or the group 15 in the periodic table, containing substantially no cross-linking sulfur and Li2S.
    Type: Application
    Filed: May 12, 2015
    Publication date: August 27, 2015
    Inventors: Masahiro TATSUMISAGO, Akitoshi HAYASHI, Shigenori HAMA, Koji KAWAMOTO, Yasushi TSUCHIDA, Hiroshi NAGASE, Yukiyoshi UENO, Masato KAMIYA