Patents by Inventor Hajime Satou

Hajime Satou 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: 20200243867
    Abstract: A resin current collector provides means for improving the cycle characteristics in a lithium ion battery and includes a polyolefin resin, and a conductive carbon filler. The total surface area of the conductive carbon filler contained in 1 g of the resin current collector is 7.0 m2 or more and 10.5 m2 or less.
    Type: Application
    Filed: October 15, 2018
    Publication date: July 30, 2020
    Inventors: Ryosuke Kusano, Yoshihiro Ikeda, Yasuhiro Tsudo, Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Patent number: 10727476
    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: April 12, 2018
    Date of Patent: July 28, 2020
    Assignees: SANYO CHEMICAL INDUSTRIES, 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: 10707493
    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: Grant
    Filed: September 21, 2016
    Date of Patent: July 7, 2020
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko Ohsawa, Hajime Satou, Yuki Kusachi, Hiroshi Akama, Hideaki Horie, Masatoshi Okura
  • Patent number: 10700345
    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: Grant
    Filed: February 14, 2017
    Date of Patent: June 30, 2020
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie, Naofumi Shoji, Masatoshi Okura
  • Patent number: 10673057
    Abstract: To provide a negative electrode for a lithium ion battery in which a volume change of a silicon-based negative electrode active material due to charging and discharging is small, and a production method therefor. Provided is a method for producing a negative electrode for a lithium ion battery, the method including a step of forming a coating film on a current collector or a separator by using a slurry containing a negative electrode active material composition, which contains a silicon-based negative electrode active material and a carbon-based negative electrode active material, and a dispersion medium, in which the method further includes a step of doping the silicon-based negative electrode active material with lithium ions and a step of doping the carbon-based negative electrode active material with lithium ions before or after the step of forming the coating film and before assembling a lithium ion battery, and the method does not substantially include a step of drying the coating film.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: June 2, 2020
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Kazuya Tsuchida, Yusuke Nakashima, Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Patent number: 10658674
    Abstract: An electrode for improving the durability of a battery includes a current collector and an active material layer. The current collector has a conductive resin layer including a polymer material and a conductive filler. 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: Grant
    Filed: August 21, 2015
    Date of Patent: May 19, 2020
    Assignee: 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: 20200136125
    Abstract: The present invention provides a method of producing an electrode active material molded body for a lithium-ion battery suitable for the production of a lithium-ion battery, and a method of producing a lithium-ion battery using the electrode active material molded body, wherein the methods can reduce the time, work, equipment, and the like required for the production. The present invention provides a method of producing an electrode composition molded body for a lithium-ion battery, including: a molding step of molding a composition containing an electrode active material for a lithium-ion battery and an electrolyte solution into an electrode active material molded body for a lithium-ion battery as an unbound product of the electrode active material for a lithium-ion battery, wherein the composition has an electrolyte solution content of 0.1 to 40 wt % based on the weight of the composition.
    Type: Application
    Filed: April 20, 2018
    Publication date: April 30, 2020
    Applicants: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Takuya SUENAGA, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20200091508
    Abstract: To provide a non-aqueous electrolyte secondary battery negative electrode material that can be produced even without performing a heat treatment at a high temperature such as 2,000° C. or higher and can have the discharge capacity further increased. The non-aqueous electrolyte secondary battery negative electrode material according to the invention has a core portion including carbonaceous negative electrode active material particles; and a shell portion including a polyimide and silicon-based negative electrode active material particles and/or tin-based negative electrode active material particles. There is a feature that the value of the ratio of the volume average particle size (D50) of the silicon-based negative electrode active material particles and/or tin-based negative electrode active material particles with respect to the volume average particle size (D50) of the carbonaceous negative electrode active material particles is 0.001 to 0.
    Type: Application
    Filed: March 26, 2018
    Publication date: March 19, 2020
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Naofumi SHOJI
  • Publication number: 20200058923
    Abstract: To provide a negative electrode for a lithium ion battery having high energy density and excellent rapid charging characteristics. A negative electrode for a lithium ion battery, the negative electrode including a negative electrode current collector, a negative electrode active material layer formed on the surface of the negative electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the negative electrode active material layer includes a negative 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 negative electrode active material layer with respect to the battery capacity based on a total amount of the negative electrode active material is 3% to 17%.
    Type: Application
    Filed: November 7, 2017
    Publication date: February 20, 2020
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Kazuya MINAMI, Yusuke NAKASHIMA, Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20200028145
    Abstract: A secondary battery is provided with a power generation element, an electroconductive member, an external short circuit, a current detector and an external discharge safety circuit. The power generation element has a unit cell layer that includes a positive electrode, a separator and a negative electrode stacked in that order. The electroconductive member is disposed on one outward side of the power generation element with an insulation member interposed therebetween. A lead wire connects the electroconductive member with the negative electrode tab. The current detector detects whether or not current is flowing to the lead wire. The external discharge safety circuit is provided to short-circuits a path between the positive electrode tab and the negative electrode tab outside the power generation element while current detector detects a current.
    Type: Application
    Filed: March 3, 2017
    Publication date: January 23, 2020
    Inventors: Gentaro KANO, Atsushi HORAI, Kazuki ARIHARA, Hajime SATOU, Yasuhiko OHSAWA, Ryoichi SENBOKUYA, Maki CHUMON, Eiji MINEGISHI
  • Publication number: 20200020926
    Abstract: To provide a negative electrode for a non-aqueous electrolyte secondary battery that can be produced even without performing a heat treatment at a high temperature such as 2,000° C. or higher and can have the discharge capacity and the cycle characteristics (capacity retention) further increased. The negative electrode for a non-aqueous electrolyte secondary battery according to the invention has a configuration in which a negative electrode active material layer containing a negative electrode material and a binder is formed on the surface of a current collector. Further, the negative electrode material has a core portion including carbonaceous negative electrode active material particles; and a shell portion including a polyimide and silicon-based negative electrode active material particles and/or tin-based negative electrode active material particles.
    Type: Application
    Filed: March 26, 2018
    Publication date: January 16, 2020
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE, Hideki NISHIMURA
  • Publication number: 20200020938
    Abstract: To provide a negative electrode for a lithium ion battery which is excellent in energy density and cycle characteristics and has a small volume change at the time of charging. Provided is a negative electrode for a lithium ion battery comprising a negative electrode active material layer, in which the negative electrode active material layer is formed from a non-bound body of a mixture containing silicon and/or silicon compound particles and carbon-based negative electrode active material particles, a volume average particle size of the silicon and/or silicon compound particles is 0.01 to 10 ?m, a volume average particle size of the carbon-based negative electrode active material particles is 15 to 50 ?m, and a mass mixing ratio of the total of the silicon and silicon compound particles and the carbon-based negative electrode active material particles contained in the mixture is 5:95 to 45:55.
    Type: Application
    Filed: December 19, 2017
    Publication date: January 16, 2020
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yusuke MIZUNO, Naofumi SHOJI, Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Patent number: 10490486
    Abstract: In a non-leaded type semiconductor device, a tab, tab suspension leads, and other leads are exposed to one surface of a seal member. A semiconductor element is positioned within the seal member and fixed to a surface of the tab with an adhesive. The tab is formed larger than the semiconductor element so that outer peripheral edges of the tab are positioned outside outer peripheral edges of the semiconductor element. A groove is formed in the tab surface portion positioned between the area to which the semiconductor element is fixed and wire connection areas to which the wires are connected, the groove being formed so as to surround the semiconductor element fixing area, thereby preventing peeling-off between the tab to which the semiconductor element is fixed and the resin which constitutes the package.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: November 26, 2019
    Assignees: Renesas Electronics Corporation, Renesas Semiconductor Package & Test Solutions Co., Ltd.
    Inventors: Hajime Hasebe, Tadatoshi Danno, Yukihiro Satou
  • Publication number: 20190355940
    Abstract: The battery pack has a laminated body in which unit cells are laminated one on another, a cell case having a first opening and containing the laminated body, and a first lid member to tightly close the first opening. The first opening is positioned to face, in connection with a unit cell laminated direction, a first face of the laminated body. The first lid member is configured to, if an internal pressure of the cell case is lower than atmospheric pressure, deform while keeping the tightly closing state, come into contact with the first face of the laminated body, and apply a pressure based on a differential pressure between atmospheric pressure and the internal pressure of the cell case to the contacting face.
    Type: Application
    Filed: March 8, 2017
    Publication date: November 21, 2019
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Hajime SATOU, Yasuhiko OHSAWA, Yuki KUSACHI, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Yusuke EMORI, Takahiro IMAISHI
  • Publication number: 20190319254
    Abstract: To provide a negative electrode for a lithium ion battery in which a volume change of a silicon-based negative electrode active material due to charging and discharging is small, and a production method therefor. Provided is a method for producing a negative electrode for a lithium ion battery, the method including a step of forming a coating film on a current collector or a separator by using a slurry containing a negative electrode active material composition, which contains a silicon-based negative electrode active material and a carbon-based negative electrode active material, and a dispersion medium, in which the method further includes a step of doping the silicon-based negative electrode active material with lithium ions and a step of doping the carbon-based negative electrode active material with lithium ions before or after the step of forming the coating film and before assembling a lithium ion battery, and the method does not substantially include a step of drying the coating film.
    Type: Application
    Filed: December 19, 2017
    Publication date: October 17, 2019
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Kazuya TSUCHIDA, Yusuke NAKASHIMA, Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • 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
  • Publication number: 20190134932
    Abstract: Provided is a tire vulcanizing method enabling an optimum vulcanization operation for each tire by measuring the temperatures of the inner surface and the outer surface of a tire until the demolding timing without damaging the tire and by determining the vulcanized state of the tire accurately based on the measured temperature data to efficiently produce uniformly vulcanized tires especially under conditions where the temperature of a mold fluctuates. During vulcanization of a tire G, the temperatures of the inner surface and the outer surface at a plurality of principal portions representing the tire G are measured, and the demolding timing is determined according to the equivalent degree of vulcanization indicating the degree of progress in crosslinking reaction calculated based on the temperature data measured.
    Type: Application
    Filed: March 31, 2017
    Publication date: May 9, 2019
    Inventors: Hajime Satou, Noboru Takita
  • Patent number: 10283769
    Abstract: In a non-aqueous organic electrolyte secondary cell, the counter charge capacity ratio (A/C) between the cathodes and the anodes represented by the following formula is set to within the range from 1.10 to 1.35, A/C=?×(anode charge capacity×?)/(cathode charge capacity×?×?) where ? is the electrode area coefficient defined as (anode area)/(cathode area) and ?>1.0, ? is a design coefficient and 0.85???1.15, ? is the charge-discharge efficiency ratio defined as (charge-discharge ratio at 25° C.)/(charge-discharge ratio at 55° C.), and ? is the temperature characteristic coefficient defined as (charge capacity at 55° C.)/(charge capacity at 25° C.).
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: May 7, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Shinji Yamamoto, Hideaki Tanaka, Hajime Satou
  • 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