Patents by Inventor Hideyuki Koga

Hideyuki Koga 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: 10811653
    Abstract: An object of the present disclosure is to provide a lithium ion battery with low resistance to ion conduction. The present disclosure achieves the object by providing a lithium ion battery comprising: a cathode active material; an anode active material; an insulating oxide with neither electron conductivity nor ion conductivity that is formed in an interface between the cathode active material and the anode active material, and contains at least one kind of an element included in the cathode active material and at least one kind of an element included in the anode active material; and an electrolyte material that is an ion conducting path between the cathode active material and the anode active material; wherein the cathode active material comprises Li, at least one kind of Co, Mn, Ni, and Fe, and O; and the anode active material comprises at least one kind of Si, Li and Ti.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: October 20, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hideyuki Koga
  • Patent number: 10513966
    Abstract: A refrigerant control valve device includes: a spherical rotor having an opening and rotating about a rotation axis; a housing including at least one circumferential port, and an axial port, the housing allowing a refrigerant to flow therein and the rotor being accommodated in the housing; at least one hole formed in the rotor and allowing the internal space of the rotor and the circumferential port to communicate with each other when the rotor rotates; a ring-shaped seal member installed coaxially with the circumferential port; a biasing member applying a biasing force to the seal member; a packing body provided between the housing and an outer diameter portion of the seal member; and a fixing member holding the packing body with the housing in a direction in which the circumferential port extends.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: December 24, 2019
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hideyuki Suzuki, Masanobu Matsusaka, Yojiro Koga, Naoto Yumisashi, Koichi Maruyama
  • Patent number: 10514103
    Abstract: A refrigerant control valve apparatus which maintains improved sealing ability while being restrained from being enlarged includes a housing including a first discharge port and a second discharge port which includes a smaller diameter than the first discharge port, a rotor rotatably housed at the housing, a bore portion provided at an outer wall portion of the rotor to control a flow of refrigerant relative to the first discharge port and the second discharge port, a second seal portion of the second discharge port being configured to make contact with an edge portion of the bore portion in a case where the rotor is specified at any rotation position for sending out the refrigerant to the second discharge port.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: December 24, 2019
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Naoto Yumisashi, Koichi Maruyama, Yojiro Koga, Hideyuki Suzuki, Masanobu Matsusaka
  • Patent number: 10361427
    Abstract: An all-solid-state battery having an olivine-type positive electrode active material and a sulfur solid electrolyte and a method for producing the all-solid-state battery is provided. The positive electrode active material is a positive electrode active material in which primary particles aggregate into secondary particles. The primary particles have an olivine-type positive electrode active material and a coating layer that coats all or a portion of the olivine-type positive electrode active material. The coating layer contains a transition metal derived from the olivine-type positive electrode active material, lithium, phosphorous and oxygen as components thereof, and the concentration of the transition metal is lower the concentration of the olivine-type positive electrode active material.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: July 23, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Mayuko Osaki, Yohei Shindo, Manabu Imano, Hideyuki Koga, Hidenori Miki
  • Patent number: 10355267
    Abstract: A method is provided where an anode of an all-solid-state lithium ion secondary battery is easily doped with lithium and to provide a small resistance at a low battery capacity. The method includes a manufacturing method of a cathode including mixing at least a conductive assistant (C1) and a sulfide solid electrolyte (E1) to obtain a mixture; and mixing at least one cathode active material, a solid electrolyte (E2) and the mixture obtained from the first step to obtain a cathode mixture, wherein an amount of energy added to the sulfide solid electrolyte (E1) is larger than an amount of energy added to the solid electrolyte (E2), and the mixture is a material that releases lithium ions at a potential lower than a potential at which the cathode active material releases and occludes lithium ions. Manufacturing methods for a cathode and an all-solid-state lithium ion secondary battery including the cathode mixture are also disclosed.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: July 16, 2019
    Assignee: Toyota Jidosha Kabuhiki Kaisha
    Inventors: Norihiro Ose, Hikaru Aso, Keisuke Omori, Hajime Hasegawa, Mitsutoshi Otaki, Hideyuki Koga
  • Publication number: 20180151878
    Abstract: The present invention relates to an anode material for lithium-ion batteries. The anode material for lithium-ion batteries is represented by the molecular formula: MxNyTizO(x+3y+4z)/2, where: 0?x?8, 1?y?8, and 1?z?8; M is an alkali metal selected from the group consisting of Li, Na, and K; and N is a group VA element selected from the group consisting of P, Sb, and Bi or a rare earth metal selected from the group consisting of Nd, Pm, Sm, Eu, Yb, and La. The anode material of the present invention has a delithiation potential of 0.8 to 1.2 V vs. Li+/Li, and has a better potential plateau, better cycle performance, and better output-input properties, than a titanium-based anode material.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 31, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Shanghai Jiao Tong University
    Inventors: Li YANG, Zhengxi ZHANG, Jun HUANG, Qinghua TIAN, Hideyuki KOGA
  • Patent number: 9920426
    Abstract: A method for producing a lithium phosphorus oxynitride layer having high ionic conductivity is provided. The method for producing a lithium phosphorus oxynitride layer on a substrate by atomic layer deposition comprises an atmosphere interchanging step, wherein the atmosphere surrounding the substrate is alternately switched between a first atmosphere, containing a first precursor such as a dialkyl phosphoramidate and/or alkyl phosphorodiamidate, and a second atmosphere, containing a second precursor such as a lithium hexaalkyl disilazide.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: March 20, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yohei Shindo, Taishi Shiotsuki, Hideyuki Koga, Maarit Karppinen, Mikko Nisula
  • Publication number: 20180047965
    Abstract: An object of the present disclosure is to provide a lithium ion battery with low resistance to ion conduction. The present disclosure achieves the object by providing a lithium ion battery comprising: a cathode active material; an anode active material; an insulating oxide with neither electron conductivity nor ion conductivity that is formed in an interface between the cathode active material and the anode active material, and contains at least one kind of an element included in the cathode active material and at least one kind of an element included in the anode active material; and an electrolyte material that is an ion conducting path between the cathode active material and the anode active material; wherein the cathode active material comprises Li, at least one kind of Co, Mn, Ni, and Fe, and O; and the anode active material comprises at least one kind of Si, Li and Ti.
    Type: Application
    Filed: July 20, 2017
    Publication date: February 15, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hideyuki KOGA
  • Publication number: 20170244097
    Abstract: A method is provided where an anode of an all-solid-state lithium ion secondary battery is easily doped with lithium and to provide a small resistance at a low battery capacity. The method includes a manufacturing method of a cathode including mixing at least a conductive assistant (C1) and a sulfide solid electrolyte (E1) to obtain a mixture; and mixing at least one cathode active material, a solid electrolyte (E2) and the mixture obtained from the first step to obtain a cathode mixture, wherein an amount of energy added to the sulfide solid electrolyte (E1) is larger than an amount of energy added to the solid electrolyte (E2), and the mixture is a material that releases lithium ions at a potential lower than a potential at which the cathode active material releases and occludes lithium ions. Manufacturing methods for a cathode and an all-solid-state lithium ion secondary battery including the cathode mixture are also disclosed.
    Type: Application
    Filed: February 3, 2017
    Publication date: August 24, 2017
    Inventors: Norihiro OSE, Hikaru ASO, Keisuke OMORI, Hajime HASEGAWA, Mitsutoshi OTAKI, Hideyuki KOGA
  • Publication number: 20170084912
    Abstract: An all-solid-state battery having an olivine-type positive electrode active material and a sulfur solid electrolyte and a method for producing the all-solid-state battery is provided. The positive electrode active material is a positive electrode active material in which primary particles aggregate into secondary particles. The primary particles have an olivine-type positive electrode active material and a coating layer that coats all or a portion of the olivine-type positive electrode active material. The coating layer contains a transition metal derived from the olivine-type positive electrode active material, lithium, phosphorous and oxygen as components thereof, and the concentration of the transition metal is lower the concentration of the olivine-type positive electrode active material.
    Type: Application
    Filed: September 16, 2016
    Publication date: March 23, 2017
    Inventors: Mayuko Osaki, Yohei Shindo, Manabu Imano, Hideyuki Koga, Hidenori Miki
  • Publication number: 20170067161
    Abstract: A method for producing a lithium phosphorus oxynitride layer having high ionic conductivity is provided. The method for producing a lithium phosphorus oxynitride layer on a substrate by atomic layer deposition comprises an atmosphere interchanging step, wherein the atmosphere surrounding the substrate is alternately switched between a first atmosphere, containing a first precursor such as a dialkyl phosphoramidate and/or alkyl phosphorodiamidate, and a second atmosphere, containing a second precursor such as a lithium hexaalkyl disilazide.
    Type: Application
    Filed: September 2, 2016
    Publication date: March 9, 2017
    Inventors: Yohei Shindo, Taishi Shiotsuki, Hideyuki Koga, Maarit Karppinen, Mikko Nisula
  • Patent number: 9455445
    Abstract: The main object of the present invention is to provide a cathode active material for a lithium secondary battery with high theoretical capacity. The present invention solves the problem by providing a cathode active material for a lithium secondary battery, wherein the cathode active material comprises a crystal structure belonging to a space group C12/c1, and is represented by (Na1-?Li?)xM1-yNy(PO4)z (0.5???1, 2.5?x?3.5, 0?y?0.5, 1.5?z?2.5, M is at least one of V and Fe, and N is at least one of Co, Ni and Mn).
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: September 27, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hideyuki Koga
  • Publication number: 20160043399
    Abstract: The main object of the present invention is to provide a cathode active material for a lithium secondary battery with high theoretical capacity. The present invention solves the problem by providing a cathode active material for a lithium secondary battery, wherein the cathode active material comprises a crystal structure belonging to a space group C12/c1, and is represented by (Na1-?Li?)xM1-yNy(PO4)z (0.5???1, 2.5?x?3.5, 0?y?0.5, 1.5?z?2.5, M is at least one of V and Fe, and N is at least one of Co, Ni and Mn).
    Type: Application
    Filed: July 28, 2015
    Publication date: February 11, 2016
    Inventor: Hideyuki KOGA
  • Patent number: 8852799
    Abstract: An object of the invention is to provide an inexpensive non-aqueous electrolyte secondary battery that allows reversible charge and discharge to be carried out and can be used for a long period because of a stable non-aqueous electrolyte used therein. The invention provides a non-aqueous electrolyte secondary battery including a positive electrode including a positive electrode active material and capable of storing and releasing sodium, a negative electrode capable of storing and releasing sodium, and a non-aqueous electrolyte, and the positive electrode active material includes sodium, nickel, manganese, and a transition metal that can exist in a hexavalent state. An example of the transition metal that can exist in a hexavalent state may include tungsten (W). An example of the negative electrode may include a sodium metal capable of storing and releasing sodium ions.
    Type: Grant
    Filed: September 4, 2006
    Date of Patent: October 7, 2014
    Assignee: C/O Intellectual Property H.Q., Sanyo Electric Co., Ltd.
    Inventors: Masaharu Itaya, Hideyuki Koga, Kumiko Kanai, Takao Inoue, Masahisa Fujimoto
  • Patent number: 8603672
    Abstract: A main object of the invention is to provide a cathode active material used to form a lithium secondary battery having the improved cycle characteristics and output. The invention attains the object by providing a semiconductor-covered cathode active material comprising: a cathode active material; and a pn junction semiconductor covering layer which comprises an n-type semiconductor covering layer that covers a surface of the cathode active material and a p-type semiconductor covering layer that covers the surface of the n-type semiconductor covering layer.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: December 10, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hideyuki Koga
  • Patent number: 8349496
    Abstract: A non-aqueous electrolyte secondary battery having a negative electrode, a non-aqueous electrolyte, and a positive electrode having a positive electrode active material comprising sodium oxide, is characterized in that the sodium oxide contains lithium, and the molar amount of the lithium is less than the molar amount of the sodium.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: January 8, 2013
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Motoharu Saito, Hideyuki Koga, Katsutoshi Takeda, Masahisa Fujimoto
  • Publication number: 20120135319
    Abstract: A non-aqueous electrolyte secondary battery having a negative electrode, a non-aqueous electrolyte, and a positive electrode having a positive electrode active material comprising sodium oxide, is characterized in that the sodium oxide contains lithium, and the molar amount of the lithium is less than the molar amount of the sodium.
    Type: Application
    Filed: February 9, 2012
    Publication date: May 31, 2012
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Motoharu SAITO, Hideyuki KOGA, Katsutoshi TAKEDA, Masahisa FUJIMOTO
  • Patent number: 8178243
    Abstract: A method of producing a non-aqueous electrolyte secondary battery having a negative electrode, a non-aqueous electrolyte, and a positive electrode having a positive electrode active material comprising sodium oxide, characterized in that: the sodium oxide contains lithium; and the molar amount of the lithium is less than the molar amount of the sodium.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: May 15, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Motoharu Saito, Hideyuki Koga, Katsutoshi Takeda, Masahisa Fujimoto
  • Patent number: 8067118
    Abstract: A mixed positive electrode active material is used. The mixed positive electrode active material is obtained by mixing a layered oxide whose initial charge-discharge efficiency when lithium metal is used for a counter electrode is less than 100% (hereinafter referred to as a first layered oxide) and a layered oxide whose initial charge-discharge efficiency is 100% or more (hereinafter referred to as a second layered oxide). Examples of the first layered oxide include Li1+aMnxCoyNizO2. A sodium oxide such as LiANaBMnXCoYNiZO2 other than a layered compound from which lithium is previously extracted by acid treatment or the like can be used as the second layered oxide whose initial charge-discharge efficiency is 100% or more. A layered oxide obtained by replacing (ion exchange) sodium in the foregoing LiANaBMnXCoYNiZO2 with lithium can be also used as the second layered oxide.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: November 29, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Motoharu Saito, Hideyuki Koga, Katsutoshi Takeda, Hiroshi Sawada, Masahisa Fujimoto
  • Publication number: 20110111291
    Abstract: A main object of the invention is to provide a cathode active material used to form a lithium secondary battery having the improved cycle characteristics and output. The invention attains the object by providing a semiconductor-covered cathode active material comprising: a cathode active material; and a pn junction semiconductor covering layer which comprises an n-type semiconductor covering layer that covers a surface of the cathode active material and a p-type semiconductor covering layer that covers the surface of the n-type semiconductor covering layer.
    Type: Application
    Filed: January 7, 2009
    Publication date: May 12, 2011
    Inventor: Hideyuki Koga