Patents by Inventor Jiro Okada

Jiro Okada 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: 20240266526
    Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle, wherein the secondary particle has a hollow structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [%].
    Type: Application
    Filed: March 21, 2024
    Publication date: August 8, 2024
    Applicant: SUMITOMO METAL MINING CO.,LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Publication number: 20240234710
    Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle, wherein the secondary particle has a hollow structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [%].
    Type: Application
    Filed: March 21, 2024
    Publication date: July 11, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Patent number: 11967709
    Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle, wherein the secondary particle has a hollow structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [%].
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: April 23, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Patent number: 11855283
    Abstract: The present invention provides a method of evaluating a characteristic of a positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle. The secondary particle has a porous internal structure. The characteristic being evaluated is a slurry pH, a soluble lithium content rate, or a porosity.
    Type: Grant
    Filed: October 10, 2022
    Date of Patent: December 26, 2023
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Patent number: 11811052
    Abstract: The present invention provides a positive electrode active material for a non-aqueous electrolyte secondary battery including a lithium metal composite oxide powder represented by a general formula: LizNi1?x?yCoxMyO2+?, wherein 0<x?0.35, 0?y?0.35, 0.95?z?1.30, ?0.15???0.15, and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti and Al; and a coating layer placed on particle surfaces of the lithium metal composite oxide powder; wherein the coating layer is a mixed-phase of a crystalline phase and an amorphous phase.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: November 7, 2023
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Jiro Okada, Tetsufumi Komukai, Jun Yokoyama, Takahiro Ogawa, Tomoko Nakayama
  • Patent number: 11784310
    Abstract: The present invention provides a lithium-nickel-manganese-cobalt composite oxide in which the reactivity between a lithium raw material and a metal composite hydroxide is improved so that a high low-temperature output characteristic can be achieved, a method for manufacturing the composite oxide, and a positive electrode active material and the like without causing a problem of gelation during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle. The secondary particle has a solid structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, and the specific surface area is 1.0 to 2.0 [m2/g].
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: October 10, 2023
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Patent number: 11605815
    Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle. The secondary particle has a porous structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5[% by mass] or less, the specific surface area is 3.0 to 4.0 [m2/g], and the porosity is more than 50 to 80[%].
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: March 14, 2023
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Publication number: 20230051717
    Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle. The secondary particle has a porous structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, the specific surface area is 3.0 to 4.0 [m2/g], and the porosity is more than 50 to 80 [%].
    Type: Application
    Filed: October 10, 2022
    Publication date: February 16, 2023
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Patent number: 11529962
    Abstract: Provided is an autonomous driving assistance system for vehicles that has redundancy without posing any problem in diversity. The autonomous driving assistance system includes: a sensor configured to acquire surroundings information; a downstream device including an actuator configured to control a vehicle; and a driving assistance device configured to calculate a control amount for the downstream device on the basis of the surroundings information. The downstream device further includes a diagnosis unit configured to: perform comparison between at least two control amounts that include the control amount calculated in the driving assistance device and a control amount calculated in the downstream device on the basis of the surroundings information; and determine, if the control amounts are equal to each other, that the control amounts are normal, and determine, if the control amounts are different from each other, that the control amounts are abnormal.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: December 20, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taizo Toda, Akio Numakura, Jiro Okada
  • Publication number: 20220376243
    Abstract: The positive electrode active material is capable of reducing positive electrode resistance, exhibiting better output characteristics, and having high mechanical strength when the positive electrode active material is used in a lithium ion secondary battery. Secondary particles have a d50 of 3.0 to 7.0 ?m, a BET specific surface area of 2.0 to 5.0 m2/g, a tap density of 1.0 to 2.0 g/cm3, and an oil absorption amount of 30 to 60 ml/100 g. In each of a plurality of primary particles having a primary particle size of 0.1 to 1.0 ?m, a coefficient of variation of the concentration of an additive element M is 1.5 or less. The volume of a linking section between the primary particles per primary particle, obtained from the total volume of the linking section and the number of primary particles constituting the secondary particles, is 5×105 to 9×107 nm3.
    Type: Application
    Filed: September 18, 2020
    Publication date: November 24, 2022
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Tetsutaro Hayashi, Shun Kai Bong, Shinsuke Suganuma, Toshihiro Kato, Jiro Okada
  • Patent number: 11411214
    Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries and production method thereof that are able to improve the stability of positive electrode mixture material pastes used to produce nonaqueous electrolyte secondary batteries, as well as to improve the output characteristics and charge/discharge cycle characteristics of secondary batteries. A method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries includes mixing a fired powder formed of a lithium-metal composite oxide having a layered crystal structure, a first compound which is at least one selected from a group consisting of a lithium-free oxide, a hydrate of the oxide, and a lithium-free inorganic acid salt, and water and drying a mixture resulting from the mixing. The fired powder includes secondary particles formed by agglomeration of primary particles. The first compound reacts with lithium ions in the presence of water to form a second compound including lithium.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: August 9, 2022
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Taira Aida, Jiro Okada, Tetsufumi Komukai, Koji Yamaji, Ryozo Ushio
  • Publication number: 20210122384
    Abstract: Provided is an autonomous driving assistance system for vehicles that has redundancy without posing any problem in diversity. The autonomous driving assistance system includes: a sensor configured to acquire surroundings information; a downstream device including an actuator configured to control a vehicle; and a driving assistance device configured to calculate a control amount for the downstream device on the basis of the surroundings information. The downstream device further includes a diagnosis unit configured to: perform comparison between at least two control amounts that include the control amount calculated in the driving assistance device and a control amount calculated in the downstream device on the basis of the surroundings information; and determine, if the control amounts are equal to each other, that the control amounts are normal, and determine, if the control amounts are different from each other, that the control amounts are abnormal.
    Type: Application
    Filed: October 3, 2018
    Publication date: April 29, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Taizo TODA, Akio NUMAKURA, Jiro OKADA
  • Publication number: 20210119201
    Abstract: The present invention provides a positive electrode active material for a non-aqueous electrolyte secondary battery including a lithium metal composite oxide powder represented by a general formula: LizNi1?x?yCoxMyO2+?, wherein 0<x?0.35, 0?y?0.35, 0.95?z?1.30, ?0.15???0.15, and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti and Al; and a coating layer placed on particle surfaces of the lithium metal composite oxide powder; wherein the coating layer is a mixed-phase of a crystalline phase and an amorphous phase.
    Type: Application
    Filed: March 28, 2019
    Publication date: April 22, 2021
    Inventors: Jiro OKADA, Tetsufumi KOMUKAI, Jun YOKOYAMA, Takahiro OGAWA, Tomoko NAKAYAMA
  • Publication number: 20200358093
    Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle. The secondary particle has a porous structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5[% by mass] or less, the specific surface area is 3.0 to 4.0 [m2/g], and the porosity is more than 50 to 80[%].
    Type: Application
    Filed: July 31, 2018
    Publication date: November 12, 2020
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Publication number: 20200350565
    Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle, wherein the secondary particle has a hollow structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [96 by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [96].
    Type: Application
    Filed: July 31, 2018
    Publication date: November 5, 2020
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Publication number: 20200335781
    Abstract: The present invention provides a lithium-nickel-manganese-cobalt composite oxide in which the reactivity between a lithium raw material and a metal composite hydroxide is improved so that a high low-temperature output characteristic can be achieved, a method for manufacturing the composite oxide, and a positive electrode active material and the like without causing a problem of gelation during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle. The secondary particle has a solid structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, and the specific surface area is 1.0 to 2.0 [m2/g].
    Type: Application
    Filed: July 31, 2018
    Publication date: October 22, 2020
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Publication number: 20190051929
    Abstract: The present invention has an object to provide a positive electrode active material for a non-aqueous electrolyte secondary battery which can improve stability of a positive electrode mixed material paste when manufacturing the secondary battery and can increase the battery capacity and improve output characteristic of the secondary battery. A method for manufacturing a positive electrode active material for a non-aqueous electrolyte secondary battery includes mixing fired powder containing lithium-metal composite oxide having a crystal structure of a layered structure with water, and drying this mixture. The fired powder includes secondary particles formed by agglomeration of primary particles. Water is mixed thereto with an amount with which pH of a supernatant obtained after 5 g of the positive electrode active material is dispersed into 100 mL of pure water followed by statically leaving the dispersion solution for 10 minutes falls within a range of 11 to 11.9 at 25° C.
    Type: Application
    Filed: March 22, 2017
    Publication date: February 14, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Jiro Okada, Taira Aida, Tetsufumi Komukai
  • Patent number: 10205416
    Abstract: A control unit for driving a motor mainly includes an input circuit for inputting various kinds of information pieces, an output circuit for driving the coil windings of the motor, an MPU for calculating a control amount based on the information from the input circuit and outputting a control signal to the output circuit; the control unit has two pieces each of the input circuit, the output circuit, and the, and can supply respective electric currents to the windings of the motor or can cut off the supply; the MPUs each have a CPU incorporated therein, a trigger circuit for a trigger signal having a predetermined period; the two CPUs synchronize at least control commands in accordance with the trigger signal and output the control commands.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: February 12, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Furukawa, Akihiko Mori, Jiro Okada
  • Publication number: 20190036112
    Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries and production method thereof that are able to improve the stability of positive electrode mixture material pastes used to produce nonaqueous electrolyte secondary batteries, as well as to improve the output characteristics and charge/discharge cycle characteristics of secondary batteries. A method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries includes mixing a fired powder formed of a lithium-metal composite oxide having a layered crystal structure, a first compound which is at least one selected from a group consisting of a lithium-free oxide, a hydrate of the oxide, and a lithium-free inorganic acid salt, and water and drying a mixture resulting from the mixing. The fired powder includes secondary particles formed by agglomeration of primary particles. The first compound reacts with lithium ions in the presence of water to form a second compound including lithium.
    Type: Application
    Filed: September 30, 2016
    Publication date: January 31, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Taira Aida, Jiro Okada, Tetsufumi Komukai, Koji Yamaji, Ryozo Ushio
  • Patent number: 9862406
    Abstract: An initial check is executed individually on each group of a plurality of groups constituted by a plurality of multiphase windings (3a, 3b) of a motor (3) and a plurality of inverter circuits (9a, 9b) corresponding respectively thereto, opening/closing control is executed on a plurality of relays (6a, 6b) in accordance with an implementation result of the initial check so that respective timings at which power is supplied to the plurality of inverter circuits are offset, and drive control is executed on the plurality of inverter circuits in accordance with the implementation result of the initial check so that respective currents passed through the plurality of multiphase windings are offset.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: January 9, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taizo Toda, Jiro Okada