Patents by Inventor Hiroshi Akama

Hiroshi Akama 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: 20190267610
    Abstract: To provide a positive electrode for a lithium ion battery having high energy density and being capable of rapid discharging. A positive electrode for a lithium ion battery, the positive electrode including a positive electrode current collector, a positive electrode active material layer formed on the surface of the positive electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the positive electrode active material layer includes a positive electrode active material and voids, the voids are filled with the non-aqueous liquid electrolyte, and a proportion of the battery capacity based on a total amount of lithium ions in the non-aqueous liquid electrolyte existing in the positive electrode active material layer with respect to the battery capacity based on a total amount of the positive electrode active material is 3.5 to 15%.
    Type: Application
    Filed: November 7, 2017
    Publication date: August 29, 2019
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Kazuya MINAMI, Yusuke NAKASHIMA, Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Patent number: 10312524
    Abstract: The present invention provides a means for improving the output performance of a battery. An electrical connection structure of the present invention includes a current collector which includes a conductive resin layer containing a polymer material and a conductive filler and a conductive member which is in electrical contact with the conductive filler.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: June 4, 2019
    Assignees: NISSAN MOTOR CO., LTD., SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasuhiko Ohsawa, Hajime Satou, Hiroshi Akama, Hideaki Horie, Yusuke Mizuno, Hiroshi Fukumoto, Masatoshi Okura, Yasuhiro Shindo, Yasuhiro Tsudo
  • Patent number: 10276858
    Abstract: The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 ?m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: April 30, 2019
    Assignees: SANYO CHEMICAL LTD., NISSAN MOTOR CO., LTD.
    Inventors: Yusuke Mizuno, Yasuhiro Shindo, Yasuhiro Tsudo, Kenichi Kawakita, Yuki Kusachi, Yasuhiko Ohsawa, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Patent number: 10256473
    Abstract: To provide a means for improving durability of a positive electrode for a lithium battery (in particular, a resin current collector for forming the positive electrode). The means is achieved by a positive electrode for a lithium battery having a resin current collector containing a polyolefin-based resin matrix and a conductive filler, and a positive electrode active material layer provided on the resin current collector, characterized in that an electron conductive layer is disposed on the surface of the resin current collector that is in contact with the positive electrode active material layer.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: April 9, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko Ohsawa, Hajime Satou, Hiroshi Akama, Hideaki Horie, Yusuke Mizuno, Hiroshi Fukumoto, Masatoshi Okura, Yasuhiro Shindo, Yasuhiro Tsudo
  • Patent number: 10236478
    Abstract: Provided is a method for producing a lithium ion cell having an outer container composed of a resin molded article, and the method for producing a lithium ion cell includes a current collector forming process of forming, on the inner side of an outer container, each of a first electrode current collector and a second electrode current collector composed of an electrically conductive polymer composition by using a molding die.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: March 19, 2019
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasuhiro Shindo, Yusuke Mizuno, Kenichi Kawakita, Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Publication number: 20190067680
    Abstract: To provide an electrode for a lithium ion secondary battery capable of enhancing a charge and discharge cycle durability of an electrode that uses a resin current collector. An electrode for a lithium ion secondary battery provided with a resin current collector including a polyolefin resin matrix and a conductive filler A, and an electrode active material layer provided on the resin current collector, in which a crosslinked resin thin-film layer, which contains an Ni filler as a conductive filler B that does not alloy with Li and which has impermeability to the electrolyte solution, is arranged between the resin current collector and a negative electrode active material layer.
    Type: Application
    Filed: February 14, 2017
    Publication date: February 28, 2019
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Naofumi SHOJI, Masatoshi OKURA
  • Patent number: 10211462
    Abstract: Provided is a lithium ion cell having a power generation part provided with a single cell obtained by stacking a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode current collector in the order, and an exterior cell container for accommodating the power generation part, in which the positive electrode active material layer is a non-bound material of a positive electrode active material particle, the negative electrode active material layer is a non-bound material of a negative electrode active material particle, and the single cell has flexibility.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: February 19, 2019
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasuhiro Shindo, Yusuke Mizuno, Kenichi Kawakita, Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Publication number: 20190020039
    Abstract: An object of the present invention is to provide a dispersant for a resin current collector which can uniformly disperse a conductive filler to attain sufficient charge and discharge characteristics without impairing the output power per unit weight of a battery. The present invention provides a dispersant for a resin current collector comprising a polymer having a resin-philic block (A1) and a conductive filler-philic block (A2).
    Type: Application
    Filed: September 19, 2018
    Publication date: January 17, 2019
    Applicants: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Hiroshi FUKUMOTO, Yasuhiro SHINDO, Manabu WATANABE, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20190020032
    Abstract: An object of the present invention is to provide a resin for coating an active material for lithium ion batteries which can prevent expansion of the electrode without inhibiting conduction of lithium ions. The resin for coating an active material for lithium ion batteries according to the present invention has a liquid absorbing rate of 10% or more when the resin is immersed in an electrolyte solution, and a tensile elongation at break of 10% or more when the resin is saturated with the electrolyte solution.
    Type: Application
    Filed: September 20, 2018
    Publication date: January 17, 2019
    Applicants: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yasuhiro TSUDO, Kenichi KAWAKITA, Yuta MURAKAMI, Yuki KUSACHI, Yasuhiko OHSAWA, Hiroshi AKAMA, Hideaki HORIE
  • Patent number: 10135073
    Abstract: An object of the present invention is to provide a dispersant for a resin current collector which can uniformly disperse a conductive filler to attain sufficient charge and discharge characteristics without impairing the output power per unit weight of a battery. The present invention provides a dispersant for a resin current collector comprising a polymer having a resin-philic block (A1) and a conductive filler-philic block (A2).
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: November 20, 2018
    Assignees: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Hiroshi Fukumoto, Yasuhiro Shindo, Manabu Watanabe, Hiroshi Akama, Hideaki Horie
  • Publication number: 20180316018
    Abstract: The present invention provides an electrode capable of reducing contact resistance between a resin current collector and the electrode, and a method of manufacturing the electrode. The electrode of the present invention includes a positive electrode current collector 11 containing a polymer material and a conductive filler, a positive electrode active material layer 13 disposed adjacent to the positive electrode current collector, and a concavoconvex shape 11c corresponding to a concavoconvex shape 13c formed on a surface of the positive electrode active material layer that is in contact with the positive electrode current collector, the concavoconvex shape being formed on a surface of the positive electrode current collector that is in contact with the positive electrode active material layer.
    Type: Application
    Filed: September 21, 2016
    Publication date: November 1, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Hajime SATOU, Yuki KUSACHI, Hiroshi AKAMA, Hideaki HORIE, Masatoshi OKURA
  • Publication number: 20180301691
    Abstract: The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 ?m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.
    Type: Application
    Filed: April 12, 2018
    Publication date: October 18, 2018
    Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yasuhiro TSUDO, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20180226654
    Abstract: The present invention provides a means for improving the output performance of a battery. An electrical connection structure of the present invention includes a current collector which includes a conductive resin layer containing a polymer material and a conductive filler and a conductive member which is in electrical contact with the conductive filler.
    Type: Application
    Filed: August 21, 2015
    Publication date: August 9, 2018
    Applicants: NISSAN MOTOR CO., LTD.2,, SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasuhiko OHSAWA, Haijime SATOU, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Hiroshi FUKUMOTO, Masatoshi OKURA, Yasuhiro SHINDO, Yasuhiro TSUDO
  • Patent number: 9941512
    Abstract: A core-shell-type electrode material is used as an electrode active material layer of a non-aqueous electrolyte secondary battery, the core-shell-type electrode material having a core part including an electrode active material and a shell part in which a conductive material is contained in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: April 10, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yasuhiko Ohsawa, Hideaki Horie, Hiroshi Akama, Yuki Kusachi, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo
  • Patent number: 9941511
    Abstract: A core-shell-type electrode material is used as an electrode active material layer of a non-aqueous electrolyte secondary battery, the core-shell-type electrode material having a core part in which at least a part of a surface of an electrode active material is coated with a first conductive material and a shell part in which a second conductive material is contained in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: April 10, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yasuhiko Ohsawa, Hideaki Horie, Hiroshi Akama, Yuki Kusachi, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo
  • Publication number: 20180090766
    Abstract: To provide a means for improving durability of a positive electrode for a lithium battery (in particular, a resin current collector for forming the positive electrode). The means is achieved by a positive electrode for a lithium battery having a resin current collector containing a polyolefin-based resin matrix and a conductive filler, and a positive electrode active material layer provided on the resin current collector, characterized in that an electron conductive layer is disposed on the surface of the resin current collector that is in contact with the positive electrode active material layer.
    Type: Application
    Filed: March 25, 2016
    Publication date: March 29, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Hiroshi FUKUMOTO, Masatoshi OKURA, Yasuhiro SHINDO, Yasuhiro TSUDO
  • Publication number: 20180090762
    Abstract: The objective of the present invention is to provide an electrode for a lithium ion battery which has excellent electron conductivity even when the thickness of the electrode is increased. The electrode for a lithium ion battery according to the present invention includes a first principal surface located on a separator side of the lithium ion battery, and a second principal surface located on a current collector side, wherein the electrode has a thickness of 50 to 5000 ?m, and the electrode includes, between the first principal surface and the second principal surface, short fibers (A) having an average fiber length of 50 nm or more and less than 100 ?m, long fibers (B) having an average fiber length of 100 ?m or more and 1000 ?m or less, and active material particles (C), and the short fibers (A) and the long fibers (B) are electroconductive fibers.
    Type: Application
    Filed: March 3, 2016
    Publication date: March 29, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yusuke NAKASHIMA, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20180048023
    Abstract: To provide a structure which allows production of an electrode, even if the film thickness of an electrode is increased; and a non-aqueous electrolyte secondary battery using the same.
    Type: Application
    Filed: December 25, 2015
    Publication date: February 15, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Yuki KUSACHI, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Kenichi KAWAKITA, Yasuhiro SHINDO, Yasuhiro TSUDO
  • Patent number: 9810120
    Abstract: An exhaust gas purifying system includes: a NOx trapping agent (2) which adsorbs nitrogen oxide when an excess air ratio of exhaust gas is more than 1, and releases nitrogen oxide when the excess air ratio is 1 or less; a NOx purifying catalyst (13) which reduces nitrogen oxide to nitrogen; and an oxygen concentration controller which controls oxygen concentration in the exhaust gas. When the excess air ratio of the exhaust gas is more than 1, nitrogen oxide is adsorbed to the NOx trapping agent (2). When the excess air ratio of the exhaust gas is 1 or less, the oxygen concentration controller controls the oxygen concentration of the exhaust gas at an inlet of the NOx purifying catalyst between 0.8 and 1.5% by volume, so that the NOx purifying catalyst reduces nitrogen oxide released from the NOx trapping agent.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: November 7, 2017
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Hiroshi Akama, Hitoshi Onodera
  • Publication number: 20170279125
    Abstract: The present invention provides a means for improving the durability of a battery. An electrode of the present invention comprises a current collector having a conductive resin layer comprising a polymer material and a conductive filler, and an active material layer, and the electrode further includes a conductive member, which is in electrical contact with the conductive filler, between the current collector and the active material layer.
    Type: Application
    Filed: August 21, 2015
    Publication date: September 28, 2017
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Hiroshi FUKUMOTO, Masatoshi OKURA, Yasuhiro SHINDO, Yasuhiro TSUDO