Patents by Inventor Tatsuya Toyama

Tatsuya Toyama 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: 20190181444
    Abstract: A positive-electrode material for a lithium ion secondary battery contains a lithium complex compound that is represented by the formula: Li1+aNibMncCodTieMfO2+?, and has an atomic ratio Ti3+/Ti4+ between Ti3+ and Ti4+, as determined through X-ray photoelectron spectroscopy, of greater than or equal to 1.5 and less than or equal to 20. In the formula, M is at least one element selected from the group consisting of Mg, Al, Zr, Mo, and Nb, and a, b, c, d, e, f, and ? are numbers satisfying ?0.1?a?0.2, 0.7<b?0.9, 0?c<0.3, 0?d<0.3, 0<e?0.25, 0?f<0.3, b+c+d+e+f=1, and ?0.2???0.2.
    Type: Application
    Filed: February 20, 2019
    Publication date: June 13, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Akira GUNJI, Hisato TOKORO, Shin TAKAHASHI, Tatsuya TOYAMA, Hiroshi HARUNA, Daiko TAKAMATSU, Takashi NAKABAYASHI, Shuichi TAKANO
  • Patent number: 10309982
    Abstract: A measurement device includes a frame member rotatably supported about a first axis line, a detection body disposed inside of the frame member and rotatably supported relative to the frame member about a second axis line, and a vane disposed on one end side of the detection body in a direction orthogonal to the second axis line and that directs the other end side of the detection body in the direction orthogonal to the second axis line toward an air flow upstream side upon receiving an air flow. The measurement device includes a wind direction sensor disposed in the detection body that detects a wind direction as a direction of the other end side of the detection body in the direction orthogonal to the second axis line, and a wind speed sensor disposed in the detection body that detects a wind speed of the air flow.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: June 4, 2019
    Assignee: DENSO CORPORATION
    Inventors: Tatsuya Toyama, Motohiro Kitada, Takashi Yasuda
  • Patent number: 10256466
    Abstract: A positive-electrode material for a lithium ion secondary battery contains a lithium complex compound that is represented by the formula: Li1+aNibMncCodTieMfO2+?, and has an atomic ratio Ti3+/Ti4+ between Ti3+ and Ti4+, as determined through X-ray photoelectron spectroscopy, of greater than or equal to 1.5 and less than or equal to 20. In the formula, M is at least one element selected from the group consisting of Mg, Al, Zr, Mo, and Nb, and a, b, c, d, e, f, and ? are numbers satisfying ?0.1?a?0.2, 0.7<b?0.9, 0?c<0.3, 0?d<0.3, 0<e?0.25, 0?f<0.3, b+c+d+e+f=1, and ?0.2???0.2.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: April 9, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Akira Gunji, Hisato Tokoro, Shin Takahashi, Tatsuya Toyama, Hiroshi Haruna, Daiko Takamatsu, Takashi Nakabayashi, Shuichi Takano
  • Publication number: 20180366727
    Abstract: Provided are a cathode active material used for a lithium ion secondary battery capable of sufficiently realizing both high charge/discharge capacities and excellent cycle properties, and a lithium ion secondary battery using the cathode active material. The cathode active material contains a plurality of secondary particles formed via agglomeration of a plurality of primary particles of a lithium transition metal composite oxide. Spreading resistance distributions of the secondary particles respectively observed in cross-sections at optional three positions of the cathode active material are measured so as to afford average values of spreading resistance of the secondary particles in the respective cross-sections. The average values of spreading resistance of the secondary particles are further averaged. The resultant averaged value of spreading resistance is made to enter the range of 1.0×106 ?/cm or more and 1.0×1010 ?/cm or less.
    Type: Application
    Filed: May 23, 2017
    Publication date: December 20, 2018
    Applicant: HITACHI METALS, LTD.
    Inventors: Tatsuya TOYAMA, Hisato TOKORO, Shin TAKAHASHI, Akira GUNJI, Shuichi TAKANO, Takashi NAKABAYASHI
  • Publication number: 20180261840
    Abstract: Provided are a cathode active substance used for a lithium ion secondary battery capable of suppressing an increase in an internal resistance inside the battery caused following charge/discharge cycles, a cathode including the cathode active substance, and a lithium ion secondary battery provided with the cathode. The cathode active substance includes a lithium composite compound represented by Formula: Li1+?NixCoyM11-x-y-zM2zO2+?. When Pi is defined as porosity with respect to an opening diameter of 0.6 ?m or less and measured by subjecting the active substance to a mercury press-in method, and Pp is defined as porosity with respect to the same diameter and measured by filling the active substance in a mold with an inner diameter of 10 mm, pressing the filled substance by a load of 40 MPa, and subjecting the pressed substance to the same method, a value of Pp/Pi is 1.5 or less.
    Type: Application
    Filed: April 27, 2017
    Publication date: September 13, 2018
    Applicant: HITACHI METALS LTD.
    Inventors: Hisato TOKORO, Takashi NAKABAYASHI, Shuichi TAKANO, Shin TAKAHASHI, Akira GUNJI, Tatsuya TOYAMA
  • Patent number: 9954230
    Abstract: A current collector for a lithium ion secondary battery, on which an electrode mixture layer is formed, satisfies A?0.10 ?m and 6?(B/A)?15 when assuming that a three-dimensional center plane average roughness SRa of a surface of at least one side of the current collector on which the electrode mixture layer is formed is A and a ratio of an actual surface area of the surface of at least one side of the current collector to a geometric area of the surface of at least one side of the current collector, which is (actual surface area)/(geometric area), is B.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: April 24, 2018
    Assignee: HITACHI METALS, LTD.
    Inventors: Tatsuya Toyama, Shin Takahashi, Atsushi Okamoto
  • Publication number: 20170358799
    Abstract: A positive-electrode material for a lithium ion secondary battery contains a lithium complex compound that is represented by the formula: Li1+aNibMncCodTieMfO2+?, and has an atomic ratio Ti3+/Ti4+ between Ti3+ and Ti4+, as determined through X-ray photoelectron spectroscopy, of greater than or equal to 1.5 and less than or equal to 20. In the formula, M is at least one element selected from the group consisting of Mg, Al, Zr, Mo, and Nb, and a, b, c, d, e, f, and ? are numbers satisfying ?0.1?a?0.2, 0.7<b?0.9, 0?c<0.3, 0?d<0.3, 0<e?0.25, 0?f<0.3, b+c+d+e+f=1, and ?0.2???0.2.
    Type: Application
    Filed: November 9, 2016
    Publication date: December 14, 2017
    Applicant: HITACHI METALS, LTD.
    Inventors: Akira GUNJI, Hisato TOKORO, Shin TAKAHASHI, Tatsuya TOYAMA, Hiroshi HARUNA, Daiko TAKAMATSU, Takashi NAKABAYASHI, Shuichi TAKANO
  • Publication number: 20170052206
    Abstract: A measurement device includes a frame member rotatably supported about a first axis line, a detection body disposed inside of the frame member and rotatably supported relative to the frame member about a second axis line, and a vane disposed on one end side of the detection body in a direction orthogonal to the second axis line and that directs the other end side of the detection body in the direction orthogonal to the second axis line toward an air flow upstream side upon receiving an air flow. The measurement device includes a wind direction sensor disposed in the detection body that detects a wind direction as a direction of the other end side of the detection body in the direction orthogonal to the second axis line, and a wind speed sensor disposed in the detection body that detects a wind speed of the air flow.
    Type: Application
    Filed: May 18, 2015
    Publication date: February 23, 2017
    Inventors: Tatsuya TOYAMA, Motohiro KITADA, Takashi YASUDA
  • Publication number: 20160254542
    Abstract: The objective of the present invention is to provide a lithium ion secondary battery, the charged state of which can be detected from the battery voltage with high accuracy, and which is able to achieve a high capacity in a high-potential range. This objective can be achieved by a cathode active material for lithium ion secondary batteries, which is composed of a lithium transition metal oxide containing Li and metal elements including at least Ni and Mn, and which is characterized in that: the atomic ratio of Li to the metal elements satisfies 1.15<Lil(metal elements)<1.5; the atomic ratio of Ni to Mn satisfies 0.334<Ni/Mn?1; and the atomic ratio of Ni and Mn to the metal elements satisfies 0.975?(Ni+Mn)/(metal elements)?1.
    Type: Application
    Filed: October 23, 2013
    Publication date: September 1, 2016
    Inventors: Hiroaki KONISHI, Akira GUNJI, Tatsuya TOYAMA, Xiaoliang FENG, Sho FURUTSUKI, Toyotaka YUASA, Mitsuru KOBAYASHI, Hisato TOKORO, Shuichi TAKANO, Takashi NAKABAYASHI
  • Publication number: 20160156020
    Abstract: Provided is a method for manufacturing a cathode electrode material, including the step of performing calcination of a mixture of lithium carbonate and a compound containing Ni, and capable of mass-producing a cathode electrode material including a lithium composite oxide with high Ni concentration industrially. The manufacturing method includes a mixture step of mixing lithium carbonate and a compound including Ni, and a calcination step of performing calcination of a mixture obtained in the mixture step under oxidizing atmosphere to obtain a lithium composite compound with high Ni concentration. The calcination step includes: a first heat treatment step to obtain a first precursor; a second heat treatment step of performing heat treatment of the first precursor to obtain a second precursor; and a third heat treatment step of performing heat treatment of the second precursor to obtain the lithium composite compound.
    Type: Application
    Filed: November 10, 2015
    Publication date: June 2, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Hisato TOKORO, Akira GUNJI, Tatsuya TOYAMA, Xiaoliang FENG, Mitsuru KOBAYASHI, Shin TAKAHASHI, Shuichi TAKANO, Takashi NAKABAYASHI, Sho FURUTSUKI
  • Publication number: 20160118648
    Abstract: A compound having a layered structure that is used for a positive electrode active material for a lithium ion secondary battery achieves both a high energy density and a high cyclability. The positive electrode active material for a lithium ion secondary battery contains a compound having a layered structure belonging to a space group R-3m, in which the compound having a layered structure is represented by a compositional formula: Li1+aM1O2+?wherein M1 represents a metal element or metal elements other than Li, and contains at least Ni, ?0.03?a?0.10, and ?0.1<?<0.1, a proportion of Ni in M1 is larger than 70 atom %, and a site occupancy of a transition metal or transition metals at a 3a site obtained by structural analysis by a Rietveld method is less than 2%, and a content of residual lithium hydroxide in the positive electrode active material is 1 mass % or less.
    Type: Application
    Filed: October 2, 2015
    Publication date: April 28, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Akira GUNJI, Tatsuya TOYAMA, Shin TAKAHASHI, Takashi NAKABAYASHI, Shuichi TAKANO, Xiaoliang FENG, Sho FURUTSUKI, Hisato TOKORO
  • Publication number: 20160099460
    Abstract: A positive electrode active material includes a primary particle represented by Compositional Formula (1): Li1+xNiyCozM1?x?y?zO2 (1), where x is a number satisfying a relation represented by an expression ?0.12?x?0.2; y is a number satisfying a relation represented by an expression 0.7?y?0.9; z is a number satisfying a relation represented by an expression 0.05?z?0.3; and M is at least one element selected from the group consisting of Mg, Al, Ti, Mn, Zr, Mo, and Nb; or a secondary particle into which the primary particle aggregates. The primary particle or the secondary particle includes a free lithium compound in a weight proportion of 0.1% or more and 2.0% or less, and the weight of lithium hydroxide in the free lithium compound is 60% or less of the weight of lithium carbonate in the free lithium compound.
    Type: Application
    Filed: September 29, 2015
    Publication date: April 7, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Tatsuya TOYAMA, Shin TAKAHASHI, Akira GUNJI, Xiaoliang FENG, Hisato TOKORO, Takashi NAKABAYASHI, Shuichi TAKANO, Sho FURUTSUKI
  • Publication number: 20160087280
    Abstract: A current collector for a lithium ion secondary battery, on which an electrode mixture layer is formed, satisfies A?0.10 ?m and 6?(B/A)?15 when assuming that a three-dimensional center plane average roughness SRa of a surface of at least one side of the current collector on which the electrode mixture layer is formed is A and a ratio of an actual surface area of the surface of at least one side of the current collector to a geometric area of the surface of at least one side of the current collector, which is (actual surface area)/(geometric area), is B.
    Type: Application
    Filed: June 16, 2014
    Publication date: March 24, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Tatsuya TOYAMA, Shin TAKAHASHI, Atsushi OKAMOTO
  • Patent number: 8951448
    Abstract: A cathode material for a lithium secondary battery capable of stably suppressing manganese dissolution even under high temperature and voltage conditions is provided. Further, by using the cathode material for a lithium secondary battery, a lithium secondary battery excellent in a charge/discharge cycle profile at a high temperature and a secondary battery module equipped with the battery are provided. The cathode material for a lithium secondary battery comprises a lithium manganese composite oxide and a coating layer formed on the surface of the lithium manganese composite oxide. The coating layer includes an oxide compound or a fluoride compound each containing M (wherein, M is at least one element selected from the group of Mg, Al and Cu), and a phosphorous compound. An atomic density of M at the side of the lithium manganese composite oxide in the coating layer is higher than an atomic density of M at the side of a surface layer of the coating layer facing to the electrolyte.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: February 10, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuya Toyama, Kazushige Kohno
  • Publication number: 20130319630
    Abstract: An air conditioning device for a vehicle, provided with: an air blower unit having a first introduction path and a second introduction path through which inside air or outside air is sucked into an upper fan and a lower fan by switching between switching doors; and an air conditioning unit for discharging air into the vehicle interior. The air conditioning device for a vehicle is characterized in that the first introduction path is an introduction path into which only the outside air is introduced when the inside air and the outside air are sucked separately and in that an outside air amount adjustment mechanism for limiting the amount of delivery of the outside air according to the speed of the vehicle is provided in the first introduction path or at a position downstream thereof to reduce the generation of wind noise at a defroster opening or a face opening.
    Type: Application
    Filed: October 3, 2011
    Publication date: December 5, 2013
    Applicant: DENSO CORPORATION
    Inventors: Yuudai Yamamoto, Tatsuya Toyama, Masashi Mizutani, Takayuki Shimauchi
  • Publication number: 20130122371
    Abstract: To provide a lithium secondary battery excellent in the life characteristic and the power density. A lithium secondary battery, comprising: a positive electrode capable of intercalating and deintercalating lithium; and an negative electrode capable of intercalating and deintercalating lithium, wherein the positive electrode contains a manganese-containing positive electrode active material of a spinel structure and an oxide that coats the surface of this positive electrode active material, wherein the oxide contains a metallic element, wherein the metallic element forms a solid solution with the positive electrode active material, and wherein the atomic concentration of the metallic element is approximately 0 at depths of from 50 to 100 nm from an external surface of the negative electrode.
    Type: Application
    Filed: January 8, 2013
    Publication date: May 16, 2013
    Inventors: Tatsuya Toyama, Kazushige Kohno
  • Patent number: 8357467
    Abstract: To provide a lithium secondary battery excellent in the life characteristic and the power density. A lithium secondary battery, comprising: a positive electrode capable of intercalating and deintercalating lithium; and an negative electrode capable of intercalating and deintercalating lithium, wherein the positive electrode contains a manganese-containing positive electrode active material of a spinel structure and an oxide that coats the surface of this positive electrode active material, wherein the oxide contains a metallic element, wherein the metallic element forms a solid solution with the positive electrode active material, and wherein the atomic concentration of the metallic element is approximately 0 at depths of from 50 to 100 nm from an external surface of the negative electrode.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: January 22, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuya Toyama, Kazushige Kohno
  • Patent number: 8146706
    Abstract: An air duct for vehicle air conditioning, includes a duct body defining a passage, and a passage dividing wall for dividing an interior of the duct body into a first passage and a second passage. In the air duct, the width of the duct body in an arrangement direction of the first and second passages in a bending section is larger than the width of the duct body in upstream-side and downstream side straight sections adjacent to the bending section, so as to increase a passage length difference (L1?L2) between the first passage and the second passage. Accordingly, the air duct has a structure capable of reducing the duct width while obtaining a desired passage length difference between the first passage and the second passage.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: April 3, 2012
    Assignee: Denso Corporation
    Inventors: Naoki Katoh, Minoru Hashimoto, Masashi Watanabe, Tatsuya Toyama, Shigeyoshi Nagaya
  • Publication number: 20120034503
    Abstract: A positive electrode material for a lithium-ion secondary battery that can stably inhibit heat generation, a lithium-ion secondary battery comprising the positive electrode material for a lithium-ion secondary battery as a positive electrode material that is excellent in safety during charging, and a secondary battery module using the lithium-ion secondary battery are provided. The positive electrode material for a lithium-ion secondary battery of the present invention is characterized in that: a coating layer comprising a phosphate compound and an oxide or fluoride containing A (where A denotes at least one element selected from the group consisting of Mg, Al, Ti, and Cu) is formed on a layered lithium-manganese composite oxide represented by the following formula: LiMnxM1-xO2 (where 0.1?x?0.
    Type: Application
    Filed: August 2, 2011
    Publication date: February 9, 2012
    Inventors: Tatsuya TOYAMA, Kazushige KOHNO
  • Publication number: 20110217574
    Abstract: A cathode material for a lithium secondary battery capable of stably suppressing manganese dissolution even under high temperature and voltage conditions is provided. Further, by using the cathode material for a lithium secondary battery, a lithium secondary battery excellent in a charge/discharge cycle profile at a high temperature and a secondary battery module equipped with the battery are provided. The cathode material for a lithium secondary battery comprises a lithium manganese composite oxide and a coating layer formed on the surface of the lithium manganese composite oxide. The coating layer includes an oxide compound or a fluoride compound each containing M (wherein, M is at least one element selected from the group of Mg, Al and Cu), and a phosphorous compound. An atomic density of M at the side of the lithium manganese composite oxide in the coating layer is higher than an atomic density of M at the side of a surface layer of the coating layer facing to the electrolyte.
    Type: Application
    Filed: February 24, 2011
    Publication date: September 8, 2011
    Inventors: Tatsuya TOYAMA, Kazushige KOHNO