Patents by Inventor Hiroki Nagai

Hiroki Nagai 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).

  • Lithium secondary battery
    Patent number: 9520592
    Abstract: A lithium secondary battery exhibiting low temperature output characteristics is provided. The lithium secondary battery of the present invention includes a current collector 12, and an active material layer 14 which is supported on the current collector 12 and contains active material particles 30 and electrically conductive material 16. The active material particles 30 each have a shell composed of a lithium transition metal oxide, a hollow part formed in the shell, and a through hole penetrating the shell. The electrically conductive material 16 contained in the active material layer 14 are arranged both in the hollow part of the active material particles and between the active material particles 30.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: December 13, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takumi Tamaki, Hiroki Nagai
  • Positive electrode active material for non-aqueous secondary battery and non-aqueous lithium secondary battery
    Patent number: 9515312
    Abstract: A lithium secondary battery (10) includes a positive electrode active material of lithium transition metal oxide which contains at least a nickel element and a manganese element as transition metals and for which, with respect to a diffraction peak A located at a diffraction angle 20 of 17° to 20° and a diffraction peak B located at a diffraction angle 2? of 43° to 46° from X-ray diffraction measurements, when the integrated intensity ratio is R1=IA/IB, the peak intensity ratio is RH=HA/HB, and the ratio between the integrated intensity ratio R1 and the peak intensity ratio RH is SF=RH/R1>> the SF satisfies 1.1?SF?2.2.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: December 6, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshinari Makimura, Tetsuro Kobayashi, Hiroki Nagai
  • Electronic device system and battery pack
    Patent number: 9515509
    Abstract: There is provided an electronic device system including a plurality of battery packs, and an electronic device that is driven by a power source supplied from the battery packs. At least one battery pack of the plurality of battery packs outputs one or both of discharge information indicating whether the battery pack is dischargeable and charge information indicating whether the battery pack is chargeable, and the electronic device includes a control unit that performs one or both of control of discharge of the battery pack based on the discharge information and control of charge of the battery pack based on the charge information.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: December 6, 2016
    Assignee: Sony Corporation
    Inventors: Hiroki Nagai, Yosuke Kubo, Kiyotaka Akasaka
  • Binder for storage battery device
    Patent number: 9490484
    Abstract: To provide a binder for a storage battery device, whereby good adhesion in an electrode and flexibility are obtainable, and it is possible to realize good charge and discharge characteristics when used for a secondary battery. A binder for a storage battery device, which is made of a fluorinated copolymer comprising structural units (a) derived from tetrafluoroethylene and structural units (b) derived from propylene, wherein the molar ratio (a)/(b) is from 40/60 to 50/50, and the total of the structural units (a) and (b) is at least 90 mol % in all structural units.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: November 8, 2016
    Assignee: Asahi Glass Company, Limited
    Inventors: Mizuna Toyoda, Takehiro Kose, Hiroki Nagai
  • Lithium secondary battery including a nickel containing lithium complex oxide
    Patent number: 9466832
    Abstract: Provided is a lithium secondary battery that comprises a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and a non-aqueous electrolyte. The positive electrode active material is a nickel-containing lithium complex oxide having a layered structure. The oxide has a composition in which W and Zr are added, and contains no Nb.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: October 11, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hiroki Nagai
  • SILICON DIOXIDE SOLAR CELL
    Publication number: 20160293340
    Abstract: In order to increase the generation efficiency of a silicon dioxide solar cell, two conductive substrates are arranged so that the conductive surfaces thereof face each other, at least one of the substrates is disposed upon the substrate facing the light entry-side substrate, and an electrolyte is filled between the silicon dioxide particles compact and the light entry-side substrate. Silicon dioxide solar cells having this configuration exhibit a significantly increased short circuit current and open circuit voltage in comparison to solar cells in which the silicon dioxide and the electrolyte are mixed. This configuration can further be improved by disposing a titanium dioxide solar cell or a dye-sensitized titanium dioxide solar cell upon the light entry-side substrate to further increase the short circuit current and the open circuit voltage.
    Type: Application
    Filed: June 7, 2016
    Publication date: October 6, 2016
    Applicant: INTERNATIONAL FRONTIER TECHNOLOGY LABORATORY, INC.
    Inventors: Nobuaki Komatsu, Tomoko Ito, Hiroki Nagai, Shin-ichiro Nanjo
  • METHOD FOR PRODUCING FLUORINATED COPOLYMER LATEX, FLUORINATED COPOLYMER LATEX, BINDER FOR PRODUCING ELECTRODE, ELECTRODE MIXTURE FOR STORAGE BATTERY DEVICE, AND ELECTRODE FOR STORAGE BATTERY DEVICE
    Publication number: 20160264764
    Abstract: To produce a method for producing a fluorinated copolymer latex with a low content of metal components and with favorable stability of the latex even with a low content of an organic solvent. A method for producing a fluorinated copolymer latex, which comprises emulsion-polymerizing a monomer mixture containing tetrafluoroethylene and propylene in the presence of an aqueous medium, an anionic emulsifying agent and a thermally decomposable radical polymerization initiator at a polymerization temperature within a range of from 50° C. to 100° C., wherein the aqueous medium comprises water alone, or water and a water-soluble organic solvent, and the content of the water-soluble organic solvent is less than 1 part by mass per 100 parts by mass of water; and the amount of use of the anionic emulsifying agent is from 1.5 to 5.0 parts by mass per 100 parts by mass of the fluorinated copolymer to be formed.
    Type: Application
    Filed: May 20, 2016
    Publication date: September 15, 2016
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Mizuna NARUMI, Takehiro KOSE, Hiroki NAGAI
  • PERFLUOROELASTOMER, PERFLUOROELASTOMER COMPOSITION, CROSSLINKED RUBBER PRODUCT, AND METHOD FOR MANUFACTURING PERFLUOROELASTOMER
    Publication number: 20160208033
    Abstract: To provide a perfluoroelastomer, which is excellent in low temperature properties, which does not lose value as a rubber and which is free from a decrease of the productivity, a perfluoroelastomer composition, a crosslinked rubber product, and a method for producing a perfluoroelastomer. A perfluoroelastomer comprising structural units (a) derived from tetrafluoroethylene, structural units (b) derived from a perfluoroalkyl vinyl ether represented by the formula (1) (such as perfluoromethyl vinyl ether) and structural units (c) derived from a perfluorooxaalkyl vinyl ether represented by the formula (2) (such as CF2?CFOCF2CF2OCF2CF2OCF2CF3).
    Type: Application
    Filed: March 30, 2016
    Publication date: July 21, 2016
    Applicant: Asahi Glass Company, Limited
    Inventors: Mizuna TOYODA, Hiroki NAGAI, Akira Onodera, Takeshi Yamada, Yukiko HATTORI
  • Active material particles for a lithium secondary battery
    Patent number: 9391318
    Abstract: Active material particles are provided that exhibit performance suitable for increasing the output of a lithium secondary battery and little deterioration due to charge-discharge cycling. The active material particles provided by the present invention have a hollow structure having secondary particles including an aggregate of a plurality of primary particles of a lithium transition metal oxide, and a hollow portion formed inside the secondary particles, and through holes that penetrates to the hollow portion from the outside are formed in the secondary particles. BET specific surface area of the active material particles is 0.5 to 1.9 m2/g.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: July 12, 2016
    Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Metal Mining Co., Ltd.
    Inventors: Hiroki Nagai, Masahiro Morita, Kensaku Mori, Shin Imaizumi, Kenji Ikeuchi, Toshiyuki Osako, Hiroyuki Toya
  • Silicon dioxide solar cell
    Patent number: 9384902
    Abstract: In order to increase the generation efficiency of a silicon dioxide solar cell, two conductive substrates are arranged so that the conductive surfaces thereof face each other, at least one of the substrates is disposed upon the substrate facing the light entry-side substrate, and an electrolyte is filled between the silicon dioxide particles compact and the light entry-side substrate. Silicon dioxide solar cells having this configuration exhibit a significantly increased short circuit current and open circuit voltage in comparison to solar cells in which the silicon dioxide and the electrolyte are mixed. This configuration can further be improved by disposing a titanium dioxide solar cell or a dye-sensitized titanium dioxide solar cell upon the light entry-side substrate to further increase the short circuit current and the open circuit voltage.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: July 5, 2016
    Assignee: INTERNATIONAL FRONTIER TECHNOLOGY LABORATORY, INC.
    Inventors: Nobuaki Komatsu, Tomoko Ito, Hiroki Nagai, Shin-ichiro Nanjo
  • Method for producing fluorinated copolymer latex, fluorinated copolymer latex, binder for producing electrode, electrode mixture for storage battery device, and electrode for storage battery device
    Patent number: 9373845
    Abstract: To produce a method for producing a fluorinated copolymer latex with a low content of metal components and with favorable stability of the latex even with a low content of an organic solvent. A method for producing a fluorinated copolymer latex, which comprises emulsion-polymerizing a monomer mixture containing tetrafluoroethylene and propylene in the presence of an aqueous medium, an anionic emulsifying agent and a thermally decomposable radical polymerization initiator at a polymerization temperature within a range of from 50° C. to 100° C., wherein the aqueous medium comprises water alone, or water and a water-soluble organic solvent, and the content of the water-soluble organic solvent is less than 1 part by mass per 100 parts by mass of water; and the amount of use of the anionic emulsifying agent is from 1.5 to 5.0 parts by mass per 100 parts by mass of the fluorinated copolymer to be formed.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: June 21, 2016
    Assignee: Asahi Glass Company, Limited
    Inventors: Mizuna Narumi, Takehiro Kose, Hiroki Nagai
  • CATHODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND MANUFACTURING METHOD FOR SAME, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    Publication number: 20160172673
    Abstract: Provided is a cathode active material for a non-aqueous electrolyte secondary battery, with which it is possible to improve the output characteristics during use in extremely low-temperature environments. A lithium compound is mixed with nickel cobalt manganese composite hydroxide particles that are expressed by the general formula: NixCoyMnzMt(OH)2+a (where x+y+z+t=1, 0.30?×?0.70, 0.10 ?y?0.40, 0.10 ?z?0.40, 0?t?0.01, and M is one or more elements selected from Mg, Ca, Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W) such that the ratio of the number of lithium atoms to the total number of atoms of metal elements other than lithium is 1:0.95 to 1.20. The lithium mixture undergoes calcination in an oxidizing atmosphere so that the rate of temperature rise in a temperature range of at least 30° C. to 800° C. is 4° C. /min to 10° C./min, the calcination temperature is 800° C. to 1000° C.
    Type: Application
    Filed: July 22, 2014
    Publication date: June 16, 2016
    Applicants: SUMITOMO METAL MINING CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki TOYA, Masahiro MORITA, Hiroki NAGAI, Yoshinari MAKIMURA, Tetsuro KOBAYASHI
  • Secondary battery
    Patent number: 9356289
    Abstract: A secondary battery 100 includes: a positive electrode mixture layer 223 containing a positive electrode active material 610 and an electrically conductive material 620; a positive electrode current collector 221 on which the positive electrode mixture layer 223 is coated; a negative electrode mixture layer 243 containing a negative electrode active material 710; and a negative electrode current collector 241 on which the negative electrode mixture layer 243 is coated, wherein a porosity A1 of the positive electrode mixture layer 223 satisfies 0.30?A1 and, at the same time, a porosity A2 of the negative electrode mixture layer 243 satisfies 0.30?A2.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: May 31, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Nagai, Masahiro Morita, Takashi Iwao
  • METHOD FOR PRODUCING AQUEOUS FLUORINATED POLYMER DISPERSION, AQUEOUS FLUORINATED POLYMER DISPERSION AND FLUORINATED POLYMER
    Publication number: 20160108225
    Abstract: To provide a method for producing a stable aqueous fluorinated polymer dispersion in which a fluorinated polymer having a high molecular weight is dispersed with excellent productivity, and an aqueous fluorinated polymer dispersion and a fluorinated polymer obtained by the production method. A method for producing an aqueous fluorinated polymer dispersion, which comprises subjecting a monomer containing at least one fluorinated monomer to emulsion polymerization in the presence of a hydrocarbon anionic emulsifier having a critical micelle concentration of at most 0.09 mass % in an aqueous medium to produce an aqueous dispersion of a fluorinated polymer.
    Type: Application
    Filed: December 30, 2015
    Publication date: April 21, 2016
    Applicant: Asahi Glass Company, Limited
    Inventors: Mizuna Toyoda, Hiroki Nagai
  • Lithium secondary battery
    Patent number: 9263729
    Abstract: A lithium secondary battery of the present invention has a positive electrode is provided with a positive electrode mix layer that includes a positive electrode active material and a conductive material. The positive electrode mix layer has two peaks, large and small, of differential pore volume over a pore size ranging from 0.01 ?m to 10 ?m in a pore distribution curve measured by a mercury porosimeter. A pore size of the smaller peak B of the differential pore volume is smaller than a pore size of the larger peak A of the differential pore volume.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: February 16, 2016
    Assignee: Toyota-Jidosha Kabushiki Kaisha
    Inventors: Hiroki Nagai, Masahiro Morita, Yukihiro Okada
  • Secondary battery
    Patent number: 9225008
    Abstract: A porosity X of a positive electrode mixture layer 223 of a secondary battery 100 is 30(%)?X. A mass ratio ? of a positive electrode active material 610 in the positive electrode mixture layer 223 is 0.84???0.925 and a mass ratio ? of a conductive material 620 in the positive electrode mixture layer 223 is 0.06???0.12. In the secondary battery 100, an index Y worked out from an expression below is 30 (mL/100 g)?Y?89 (mL/100 g). The index Y is given by the expression below, Y=A×?+B×?; where A is a DBP absorption number (mL/100 g) in the positive electrode active material 610; ? is the mass ratio of the positive electrode active material 610 in the positive electrode mixture layer 223; B is a DBP absorption number (mL/100 g) of the conductive material 620; and ? is the mass ratio of the conductive material 620 in the positive electrode mixture layer 223.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: December 29, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Nagai, Masahiro Morita, Takashi Iwao
  • PHOTOELECTRODE MATERIAL AND PHOTOCELL MATERIAL
    Publication number: 20150357500
    Abstract: A method of generating electricity utilizing silicon oxide is provided. The method includes irradiating a light to a photocell comprising a photovoltaic material which consists essentially of silicon oxide in a manner that causes the silicon oxide to generate the electricity in response to the irradiation of light, and correcting the electricity from the photovoltaic material.
    Type: Application
    Filed: August 14, 2015
    Publication date: December 10, 2015
    Applicant: IIFTL-SOLAR INC.
    Inventors: Nobuaki Komatsu, Tomoko Ito, Hiroki Nagai
  • Secondary battery
    Patent number: 9209459
    Abstract: A secondary battery 100 includes a positive electrode current collector 221 and a positive electrode mixture layer 223 which is coated over the positive electrode current collector 221. The positive electrode mixture layer 223 includes a positive electrode active material 610, an electrically conductive material 620, and a binder 630. In addition, the positive electrode active material 610 has secondary particles 910 formed by an aggregation of a plurality of primary particles of a lithium transition metal oxide, a hollow portion 920 formed in the secondary particle 910, and through holes 930 penetrating the secondary particles 910 so as to connect the hollow portion 920 and the outside. A ratio (Vbc/Va) of an inner volume Vbc of holes formed inside the positive electrode mixture layer 223 to an apparent volume Va of the positive electrode mixture layer 223 satisfies 0.25?(Vbc/Va).
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: December 8, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Nagai, Masahiro Morita, Takashi Iwao
  • CENTRIFUGAL-PENDULUM VIBRATION ABSORBING DEVICE AND ORDER SETTING METHOD FOR THE SAME
    Publication number: 20150337921
    Abstract: A centrifugal-pendulum vibration absorbing device disposed within a liquid chamber that stores a liquid, the centrifugal-pendulum vibration absorbing device having a support member coupled to a rotary element that is rotated by power from a drive device; and a mass body supported by the support member so as to be swingable. An order of vibration of the mass body is determined on the basis of an order of vibration to be damped generated by the drive device in consideration of at least a force caused by a centrifugal liquid pressure generated within the liquid chamber along with rotation of the drive device to act on the mass body.
    Type: Application
    Filed: August 6, 2015
    Publication date: November 26, 2015
    Inventors: Yoshihiro TAKIKAWA, Yoichi OI, Hiroki NAGAI, Takayuki MIYAOKA, Yuichiro HIRAI, Takuya YOSHIKAWA, Tomonori KINOSHITA, Aki OGAWA
  • Electrode structure and battery device manufacturing method
    Patent number: 9196889
    Abstract: An electrode is provided with a metal terminal extending from a battery module main body, a bolt which has an expanded section configuring a retaining section at a rear end portion and penetrates the metal terminal upward, and an insulating body which insulates the metal terminal and the battery module case one from the other. The insulating body is provided with a drop preventing section which abuts at least a lower surface of the expanded section of the bolt and prevents the bolt from dropping from the metal terminal.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: November 24, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takenori Tsuchiya, Hiroki Nagai, Masahide Hikosaka