Patents by Inventor Motoharu Obika

Motoharu Obika 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).

  • Publication number: 20210408521
    Abstract: Resin-adhered graphite particles are obtained by causing a modified novolac-type phenolic resin to adhere to graphite particles. At least part of surfaces of the graphite particles is coated with a carbonaceous coating by heating the resin-adhered graphite particles in a non-oxidizing atmosphere at 900 to 1,500° C. to carbonize the modified novolac-type phenolic resin. Arylene groups having hydroxy groups account for 5 to 95 mol % of arylene groups constituting the modified novolac-type phenolic resin. The obtained carbonaceous substance-coated graphite particles exhibit excellent battery properties when used as a negative electrode material for a lithium ion secondary battery.
    Type: Application
    Filed: September 8, 2021
    Publication date: December 30, 2021
    Applicants: JFE CHEMICAL CORPORATION, SUMITOMO BAKELITE CO., LTD.
    Inventors: Ryuta Haga, Motoharu Obika, Kunihiko Eguchi, Yoshikazu Kobayashi, Masakatsu Asami
  • Patent number: 9203073
    Abstract: A bipolar battery includes: a power generation element formed by stacking a plurality of bipolar electrodes, in which an electrode layer is formed on a front and a rear of a collector, via an electrolyte layer; an elastic metal portion provided in contact with the power generation element so as to contact the power generation element in point or line contact when no external force is exerted thereon and contact the power generation element in surface contact when external force is exerted thereon; and an outer covering material provided to accommodate the power generation element and the elastic metal portion, an internal air pressure of which is set to be lower than an atmospheric pressure such that the elastic metal portion is caused to contact the power generation element in surface contact by a pressure difference between the internal air pressure and the atmospheric pressure.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: December 1, 2015
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Motoharu Obika, Hideaki Horie, Yoshiaki Nitta
  • Patent number: 8852785
    Abstract: A bipolar secondary battery has a battery element that includes first and second bipolar electrodes each having a collector disposed with a conductive resin layer containing a first resin as a base material and positive and negative electrode active material layers formed on opposite sides of the collector and a separator containing a second resin as a base material, arranged between the first and second bipolar electrodes and retaining an electrolyte material to form an electrolyte layer. The positive electrode active material layer of the first bipolar electrode, the electrolyte layer and the negative electrode active material layer of the second bipolar electrode constitute a unit cell. A melting point of the first resin is lower than or equal to a melting point of the second resin. Outer peripheries of the collectors of the first and second bipolar electrodes and an outer periphery of the separator are fused together to thereby seal an outer peripheral portion of the unit cell.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: October 7, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenji Hosaka, Motoharu Obika
  • Patent number: 8741477
    Abstract: A bipolar secondary battery includes a power generating element in which a bipolar electrode and an electrolyte layer are stacked. The bipolar electrode includes a positive-electrode active material layer formed on one surface of a current collector and a negative-electrode active material layer formed on the opposing surface of the current collector. Peripheral edges of the bipolar electrode and electrolyte layer are bonded through a seal. Edges of the positive-electrode active material layer and the negative-electrode active material layer on opposite surfaces of a respective current collector are offset from each other. The edge of a seal portion facing an inner edge of the edges of the positive-electrode active material layer and the negative-electrode active material layer is positioned inside an outer edge of the edges of the positive-electrode active material layer and the negative-electrode active material layer.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: June 3, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Motoharu Obika
  • Patent number: 8715861
    Abstract: A bipolar secondary battery is provided with an electric power generating unit, a pair of terminal plates. The electric power generating unit includes a plurality of bipolar electrodes stacked on one another with an electrolyte layer disposed between the bipolar electrodes and separating the bipolar electrodes. Each of the bipolar electrodes includes a collector with a positive electrode active material layer formed on a first side surface of the collector, and a negative electrode active material layer formed on a second side surface of the collector. The first terminal plate is connected to a first stacking direction facing end of the electric power generating unit. The second terminal plate is connected to a second stacking direction facing end of the electric power generating unit. At least one of the terminal plates includes an electric current suppressing device that suppresses an electric current occurring when an internal short circuit occurs in the electric power generating unit.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: May 6, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Sohei Suga, Masanori Aoyagi, Kenji Ohara, Yasuo Ohta, Junji Katamura, Motoharu Obika, Kenji Hosaka, Hideaki Horie, Shigeo Watanabe
  • Patent number: 8691431
    Abstract: The present invention is intended to provide a method of producing a sealing structure of a bipolar battery capable of improving the sealing capability by means of solidifying the joint between a resin collector comprising a thermosetting resin before the setting reaction and a sealing layer, a method of producing the bipolar battery, and the sealing structure of the bipolar battery and the bipolar battery. The method of producing the sealing structure of the bipolar battery comprises s step of producing the sealing assembly 80 by joining the first sealing layer 81 consisting of thermosetting resin before the thermosetting reaction with the second sealing layer 82 consisting of the thermoplastic resin, and a step of producing the collector assembly 90 formed by sealing the contact area of the sealing assembly and the resin collector 60 by joining the sealing assembly with the thermosetting resin after the thermosetting reaction.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: April 8, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Motoharu Obika, Kenji Hosaka
  • Patent number: 8663856
    Abstract: A fuel cell stack is provided having a plurality of unit cells stacked in a horizontal direction. Each unit cell includes an electrolyte membrane having two surfaces and a peripheral edge, electrodes provided on both surfaces of the electrolyte membrane, frame-shaped members provided on both surfaces of the electrolyte membrane adjacent to the respective electrodes and adjacent the peripheral edge of the electrolyte membrane, separators provided on the electrodes and the frame-shaped members and having a reactant gas passage for supplying a reactant gas to each of the electrodes, and a manifold formed in the stacking direction in fluid communication with the reactant gas passage. The manifold includes a horizontal edge portion in fluid communication with the reactant gas passage.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: March 4, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Fumio Kagami, Motoharu Obika
  • Publication number: 20130236779
    Abstract: An electrode structure includes a substrate, an electrode active material layer formed on the substrate and divided into a plurality of portions on a side of a surface thereof, and a high resistance member having an electric resistance higher than that of an electrolyte. The high resistance member is formed on at least a part of a parting portion formed between the divided portions of the electrode active material layer. A method for producing an electrode structure, and a bipolar battery using the electrode structure are also disclosed.
    Type: Application
    Filed: April 27, 2011
    Publication date: September 12, 2013
    Inventors: Kazuki Miyatake, Kenji Hosaka, Motoharu Obika, Hiroshi Miyakubo
  • Patent number: 8497046
    Abstract: An anode (11a) and a cathode (11b) are provided on either side of an electrolyte membrane (11). A first separator (2) is disposed so as to face the anode (11a), and a second separator (3) is disposed so as to face the cathode (11b). A first sealing member (12) is disposed between the electrolyte membrane (11) and the first separator (2), and a second sealing member (13) is disposed between the electrolyte membrane (11) and the second separator (3). The cross-sectional shape or rubber hardness of the sealing members (12, 13) is varied according to a deformation amount generated in the electrolyte membrane (11) by a sealing reactive force. More specifically, in a site where the deformation amount of the electrolyte membrane (11) is large, either the contact area between the sealing member (12) and the electrolyte membrane (11) is increased, or the rubber hardness of the sealing member (12) is reduced.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: July 30, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Motoharu Obika
  • Publication number: 20130122333
    Abstract: A bipolar battery includes: a power generation element formed by stacking a plurality of bipolar electrodes, in which an electrode layer is formed on a front and a rear of a collector, via an electrolyte layer; an elastic metal portion provided in contact with the power generation element so as to contact the power generation element in point or line contact when no external force is exerted thereon and contact the power generation element in surface contact when external force is exerted thereon; and an outer covering material provided to accommodate the power generation element and the elastic metal portion, an internal air pressure of which is set to be lower than an atmospheric pressure such that the elastic metal portion is caused to contact the power generation element in surface contact by a pressure difference between the internal air pressure and the atmospheric pressure.
    Type: Application
    Filed: July 19, 2011
    Publication date: May 16, 2013
    Inventors: Motoharu Obika, Hideaki Horie, Yoshiaki Nitta
  • Patent number: 8283087
    Abstract: First reinforcing members, having a low modulus of elasticity, are disposed between an electrolyte membrane and second reinforcing members having a high modulus of elasticity, so as not to allow the electrolyte membrane to readily rub against the first reinforcing members as the electrolyte membrane expands and shrinks and to ultimately prevent degradation of the electrolyte membrane.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: October 9, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Motoharu Obika
  • Patent number: 8263289
    Abstract: A cell of a fuel cell includes a membrane electrode assembly, and metal first and second separators which sandwich the membrane electrode assembly to form gas flow paths disposed on each side of the membrane electrode assembly. A back surface of the first separator and a back surface of the second separator, the first separator and the second separator being included in adjacent cells, are in contact with each other, thereby forming a temperature-control medium flow path between the first separator and the second separator. In the first separator and the second separator, corrosion-resistant coating layers are provided only on reaction-side surfaces of the first separator and the second separator, the reaction-side surfaces facing the membrane electrode assembly, and portions where the back surface of the first separator is in contact with the back surface of the second separator are joined by welded portions.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: September 11, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Atsushi Miyazawa, Motoki Yaginuma, Motoharu Obika, Koshi Takata, Nobuo Kino, Yosuke Fukuyama
  • Publication number: 20120171567
    Abstract: The present invention is intended to provide a method of producing a sealing structure of a bipolar battery capable of improving the sealing capability by means of solidifying the joint between a resin collector comprising a thermosetting resin before the setting reaction and a sealing layer, a method of producing the bipolar battery, and the sealing structure of the bipolar battery and the bipolar battery. The method of producing the sealing structure of the bipolar battery comprises s step of producing the sealing assembly 80 by joining the first sealing layer 81 consisting of thermosetting resin before the thermosetting reaction with the second sealing layer 82 consisting of the thermoplastic resin, and a step of producing the collector assembly 90 formed by sealing the contact area of the sealing assembly and the resin collector 60 by joining the sealing assembly with the thermosetting resin after the thermosetting reaction.
    Type: Application
    Filed: February 7, 2011
    Publication date: July 5, 2012
    Inventors: Motoharu Obika, Kenji Hosaka
  • Patent number: 8173320
    Abstract: A fuel cell stack includes a membrane electrode assembly including an electrolyte membrane and electrode catalyst layers sandwiching the electrolyte membrane; metal separators that define gas channels, the metal separators being respectively disposed at both surfaces of the membrane electrode assembly; a current collector from which electromotive force is derived, the current collector being in contact with at least one of the metal separators; and joining parts that join the metal separator to the current collector at portions where the metal separator contacts the current collector.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: May 8, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Koshi Takata, Takahito Osada, Atsushi Miyazawa, Motoharu Obika, Motoki Yaginuma
  • Publication number: 20120070715
    Abstract: A bipolar secondary battery includes a power generating element in which a bipolar electrode and an electrolyte layer are stacked. The bipolar electrode includes a positive-electrode active material layer formed on one surface of a current collector and a negative-electrode active material layer formed on the opposing surface of the current collector. Peripheral edges of the bipolar electrode and electrolyte layer are bonded through a seal. Edges of the positive-electrode active material layer and the negative-electrode active material layer on opposite surfaces of a respective current collector are offset from each other. The edge of a seal portion facing an inner edge of the edges of the positive-electrode active material layer and the negative-electrode active material layer is positioned inside an outer edge of the edges of the positive-electrode active material layer and the negative-electrode active material layer.
    Type: Application
    Filed: June 23, 2010
    Publication date: March 22, 2012
    Applicant: NISSAN MOTOR CO., LTD.
    Inventor: Motoharu Obika
  • Patent number: 8092951
    Abstract: A fuel cell stack and method of manufacturing a fuel cell stack having a highly anti-corrosive property. The fuel cell stack includes a plurality of cells constructed by interposing an electrolyte membrane electrode assembly between the first and second separators. The first and second separators define gas passages on from both sides of the electrolyte membrane electrode assembly, and a gas manifold is in fluid communication with the gas flow passages through the plurality of stacked cells. Manifold openings for defining the gas manifold are formed in the first and second separators, and the opening areas of the manifold openings are differently sized. The manifold opening inner peripheral end of the first separator has a larger opening area, and is welded to the second separator to form a manifold welding portion.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: January 10, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Motoharu Obika, Atsushi Miyazawa, Nobuo Kino
  • Publication number: 20110294007
    Abstract: A bipolar secondary battery has a battery element that includes first and second bipolar electrodes each having a collector disposed with a conductive resin layer containing a first resin as a base material and positive and negative electrode active material layers formed on opposite sides of the collector and a separator containing a second resin as a base material, arranged between the first and second bipolar electrodes and retaining an electrolyte material to form an electrolyte layer. The positive electrode active material layer of the first bipolar electrode, the electrolyte layer and the negative electrode active material layer of the second bipolar electrode constitute a unit cell. A melting point of the first resin is lower than or equal to a melting point of the second resin. Outer peripheries of the collectors of the first and second bipolar electrodes and an outer periphery of the separator are fused together to thereby seal an outer peripheral portion of the unit cell.
    Type: Application
    Filed: January 28, 2010
    Publication date: December 1, 2011
    Inventors: Kenji Hosaka, Motoharu Obika
  • Publication number: 20110183166
    Abstract: A bipolar secondary battery is provided with an electric power generating unit, a pair of terminal plates. The electric power generating unit includes a plurality of bipolar electrodes stacked on one another with an electrolyte layer disposed between the bipolar electrodes and separating the bipolar electrodes. Each of the bipolar electrodes includes a collector with a positive electrode active material layer formed on a first side surface of the collector, and a negative electrode active material layer formed on a second side surface of the collector. The first terminal plate is connected to a first stacking direction facing end of the electric power generating unit. The second terminal plate is connected to a second stacking direction facing end of the electric power generating unit. At least one of the terminal plates includes an electric current suppressing device that suppresses an electric current occurring when an internal short circuit occurs in the electric power generating unit.
    Type: Application
    Filed: October 19, 2009
    Publication date: July 28, 2011
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Sohei Suga, Masanori Aoyagi, Kenji Ohara, Yasuo Ohta, Junji Katamura, Motoharu Obika, Kenji Hosaka, Hideaki Horie, Shigeo WAatanabe
  • Publication number: 20110008690
    Abstract: A fuel cell stack is provided having a plurality of unit cells stacked in a horizontal direction. Each unit cell includes an electrolyte membrane having two surfaces and a peripheral edge, electrodes provided on both surfaces of the electrolyte membrane, frame-shaped members provided on both surfaces of the electrolyte membrane adjacent to the respective electrodes and adjacent the peripheral edge of the electrolyte membrane, separators provided on the electrodes and the frame-shaped members and having a reactant gas passage for supplying a reactant gas to each of the electrodes, and a manifold formed in the stacking direction in fluid communication with the reactant gas passage. The manifold includes a horizontal edge portion in fluid communication with the reactant gas passage.
    Type: Application
    Filed: March 20, 2009
    Publication date: January 13, 2011
    Applicant: NISSAN MOTOR CO., LTD
    Inventors: Fumio Kagami, Motoharu Obika
  • Publication number: 20110003232
    Abstract: First reinforcing members, having a low modulus of elasticity, are disposed between an electrolyte membrane and second reinforcing members having a high modulus of elasticity, so as not to allow the electrolyte membrane to readily rub against the first reinforcing members as the electrolyte membrane expands and shrinks and to ultimately prevent degradation of the electrolyte membrane.
    Type: Application
    Filed: February 27, 2009
    Publication date: January 6, 2011
    Inventor: Motoharu Obika