Patents by Inventor Jun Yokoyama

Jun Yokoyama 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).

  • Patent number: 11171326
    Abstract: Provided is a method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries, the method including: a mixing step of obtaining a W-containing mixture of Li metal composite oxide particles represented by the formula: LizNi1-x-yCOxMyO2 and composed of primary particles and secondary particles formed by aggregation of the primary particles, 2 mass % or more of water with respect to the oxide particles, and a W compound or a W compound and a Li compound, the W-containing mixture having a molar ratio of the total amount of Li contained in water and the solid W compound or the W compound and the Li compound of 3 to 5 with respect to the amount of W contained therein; and a heat treatment step of heating the W-containing mixture to form lithium tungstate on the surface of the primary particles of the Li metal composite oxide particles.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: November 9, 2021
    Inventors: Takashi Ozaki, Yuki Furuichi, Jun Yokoyama, Tetsufumi Komukai
  • Publication number: 20210323088
    Abstract: A laser processing apparatus sets a processing section passing through a target position on a processing surface, sets a measurement section centered on the target position in the processing section, sets a plurality of data acquisition positions that are trajectories perpendicular to a processing direction in the measurement section. The laser processing apparatus acquires pieces of measurement data indicating shapes of keyholes at the respective data acquisition positions during processing of the processing section, and projects the pieces of measurement data in the processing direction to be superimposed on each other to create projection data. The laser processing apparatus obtains the second instruction value in a direction perpendicular to the processing direction at the target position on the basis of the projection data. Therefore, it is possible to provide a laser processing apparatus and a laser processing method capable of accurately measuring a depth of a keyhole.
    Type: Application
    Filed: March 26, 2021
    Publication date: October 21, 2021
    Inventors: JUN YOKOYAMA, YOHEI TAKECHI
  • Patent number: 11108043
    Abstract: Provided is a method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries, including: a water-washing step of mixing, with water, Li—Ni composite oxide particles represented by the formula: LizNi1-x-yCoxMyO2 and composed of primary particles and secondary particles formed by aggregation of the primary particles to water-wash it, and performing solid-liquid separation to obtain a washed cake; a mixing step of mixing a W compound powder free from Li with the washed cake to obtain a W-containing mixture; and a heat treatment step of heating the W-containing mixture, the heat treatment step including: a first heat treatment step of heating the W-containing mixture to disperse W on the surface of the primary particles; and subsequently, a second heat treatment step of heating it at a higher temperature than in the first heat treatment step to form a lithium tungstate compound on the surface of the primary particles.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: August 31, 2021
    Inventors: Kentaro Kondo, Jun Yokoyama, Yuki Furuichi, Tetsufumi Komukai
  • Patent number: 11063257
    Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries has a high charge/discharge capacity and produces high output, as well as has high filling ability. The positive electrode active material includes lithium-nickel composite oxide particles are formed by agglomeration of multiple primary particles, include pores, and have a layered crystal structure. The lithium-nickel composite oxide particles have an average particle size of 15 ?m or more and 30 ?m or less. The percentage of an area of the pores measured by a cross-sectional observation of the lithium-nickel composite oxide particles with respect to a cross-sectional area of the lithium-nickel composite oxide particles is 1.0% or more and 5.0% or less. A lithium-tungsten compound containing tungsten and lithium is present on the surface of and inside the secondary particles. The lithium-tungsten compound is present on at least part of the surface of the primary particles.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: July 13, 2021
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Jun Yokoyama, Yuki Furuichi, Tetsufumi Komukai
  • Publication number: 20210167378
    Abstract: The present invention relates to a positive electrode active material for non-aqueous electrolyte secondary battery, including lithium-nickel composite oxide particles having a layer structure of hexagonal system; and a lithium tungstate coating film disposed on a surface of secondary particles of the lithium-nickel composite oxide particles, wherein the positive electrode active material for non-aqueous electrolyte secondary battery includes, as metallic elements, lithium (Li), nickel (Ni), cobalt (Co), element M (M) which is at least one element selected from Mn, V, Mg, Mo, Nb, Ti, Ca, Cr, Zr, Ta, and Al, and tungsten (W), wherein a ratio of amount of substance in the metallic elements contained is Li:Ni:Co:M:W=a:1-x-y:x:y:z, wherein 0.97?a?1.25, 0?x?0.35, 0?y?0.35, and 0.005?z?0.030.
    Type: Application
    Filed: May 29, 2019
    Publication date: June 3, 2021
    Inventors: Yuki KOSHIKA, Haruki KANEDA, Jun YOKOYAMA
  • 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
  • Patent number: 10951707
    Abstract: A selection device includes: a storage part in which connection path information indicating a connection path of a device is stored; and a selection part configured to select the device for executing a process from among the plurality of devices. The selection part is configured to select, as the devices for executing a process, the devices whose paths from a place to store data used in the process to the devices are at least partly common on the basis of the connection path information.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: March 16, 2021
    Assignee: NEC CORPORATION
    Inventor: Jun Yokoyama
  • Publication number: 20210060695
    Abstract: A laser processing apparatus emits processing light, measurement light, processing guide light, and measurement guide light with which a surface of a workpiece is irradiated. Respective wavelengths of the processing guide light and the measurement guide light are set to wavelengths at which a deviation amount between an irradiation position of the processing guide light and an irradiation position of the measurement guide light due to a chromatic aberration of magnification of a lens, and a deviation amount between an irradiation position of the processing light and an irradiation position of the measurement light due to the chromatic aberration of magnification of the lens are equal to each other. Therefore, positioning of spot positions of a plurality of laser lights having different output differences can be realized with high accuracy and high speed.
    Type: Application
    Filed: July 28, 2020
    Publication date: March 4, 2021
    Inventors: Jun Yokoyama, Yohei Takechi
  • Publication number: 20210053149
    Abstract: Laser processing apparatus includes movable mirror for changing paths of laser light for processing and measurement light, and stage for changing an incident angle of measuring light. Furthermore, laser processing apparatus includes lens for condensing laser light for processing and measurement light on processing point, controller for controlling laser oscillator, movable mirror, and stage based on corrected data for processing, and measurement processor for measuring a depth of keyhole generated at processing point. The corrected data for processing is data corrected so as to a deviation of an arrival position of at least one of laser light for processing and measurement light caused by chromatic aberration of lens on the surface of workpiece. With this configuration, an accurate depth of keyhole can be measured.
    Type: Application
    Filed: August 17, 2020
    Publication date: February 25, 2021
    Inventors: Yohei TAKECHI, Jun YOKOYAMA
  • Patent number: 10929044
    Abstract: An information processing apparatus 100 is configured to include a selection unit 110 configured to select a storage device to be moved from a first place associated with a first storage device to a second place associated with a second storage device connected with the first storage device over a network, based on travel information 120 including the origin and the destination of the storage device. The storage device is selected as a third storage device to be used for storing transport target data stored in the first storage device and transporting the data to the second storage device.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: February 23, 2021
    Assignee: NEC CORPORATION
    Inventor: Jun Yokoyama
  • Publication number: 20200361038
    Abstract: A laser processing apparatus is used which includes: a laser oscillator that oscillates a processing laser beam at a processing point to be processed on a surface of a workpiece; an optical interferometer that emits a measurement beam to the processing point and generates an optical interference intensity signal based on interference generated due to an optical path difference between the measurement beam reflected at the processing point and a reference beam; a first mirror that changes traveling directions of the processing laser beam and the measurement beam; a second mirror that changes an incident angle of the measurement beam onto the first mirror; a lens that focuses the processing laser beam and the measurement beam on the processing point; a memory that stores corrected processing data; a control unit that controls the laser oscillator, the first mirror, and the second mirror based on the corrected processing data; and a measurement processing unit that derives a depth of a keyhole generated at the p
    Type: Application
    Filed: April 20, 2020
    Publication date: November 19, 2020
    Inventors: YOHEI TAKECHI, JUN YOKOYAMA, TAKASHI URASHIMA
  • Publication number: 20200343547
    Abstract: Provided is a positive electrode active material for non-aqueous electrolyte secondary batteries for making high capacity and high output compatible, non-aqueous electrolyte secondary batteries, having the positive electrode active material adopted thereto, and a production method for a positive electrode active material in which the positive electrode active material can be easily produced in an industrial scale. A positive electrode active material for non-aqueous electrolyte secondary batteries, contains: primary particles of a lithium nickel composite oxide represented by at least General Formula: LizNi1-x-yCoxMyO2 (0.95?z?1.03, 0<x?0.20, 0<y?0.10, x+y?0.20, and M is at least one type of element selected from Mg, Al, Ca, Ti, V, Cr, Mn, Nb, Zr, and Mo); and secondary particles configured by flocculating the primary particles, wherein an LiAl compound and an LiW compound are provided on surfaces of the primary particles.
    Type: Application
    Filed: July 31, 2018
    Publication date: October 29, 2020
    Applicants: SUMITOMO METAL MINING CO., LTD., SUMITOMO METAL MINING CO., LTD.
    Inventors: Jun Yokoyama, Kazuomi Ryoshi
  • Publication number: 20200343546
    Abstract: Provided is a positive electrode active material for non-aqueous electrolyte secondary batteries for making high capacity and high output compatible, non-aqueous electrolyte secondary batteries, to which the positive electrode active material is adopted, and a production method for a positive electrode active material in which the positive electrode active material can be easily produced even on an industrial scale. A positive electrode active material for non-aqueous electrolyte secondary batteries, comprising: primary particles of a lithium nickel composite oxide represented by at least General Formula: LizNi1-x-yCoxMyO2 (0.95?z?1.03, 0?x?0.20, 0?y?0.10, x+y?0.20, and M is at least one type of element selected from Mg, Al, Ca, Ti, V, Cr, Mn, Nb, Zr, and Mo); and secondary particles configured by aggregating the primary particles, wherein an LiAl compound is provided on surfaces of the primary particles.
    Type: Application
    Filed: July 31, 2018
    Publication date: October 29, 2020
    Inventors: Jun Yokoyama, Kazuomi Ryoshi
  • Patent number: 10784500
    Abstract: In one aspect, a method for producing a positive electrode active material for a nonaqueous electrolyte secondary battery, includes mixing first lithium nickel composite oxide particles containing lithium tungstate and second lithium nickel composite oxide particles not containing lithium tungstate. The first lithium nickel composite oxide particles have a composition represented by Liz1Ni1-x1-y1Cox1M1y1O2, and include a core material containing secondary particles each corresponding to an aggregation of a plurality of primary particles, and the lithium tungstate existing on at least a part of a surface of the primary particles on a surface of and inside the first lithium nickel composite oxide particles. The second lithium nickel composite oxide particles have a composition represented by Liz2Ni1-x2-y2Cox2M2y2O2, and include secondary particles each corresponding to an aggregation of a plurality of primary particles.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: September 22, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kentaro Kondo, Jun Yokoyama, Yuki Furuichi
  • Publication number: 20200198049
    Abstract: A laser welding apparatus includes: a laser oscillator configured to emit a laser beam toward a welding portion of a welded material; an optical interferometer configured to generate an interference signal that indicates an intensity of an interference beam of a measurement beam reflected by the welding portion and a reference beam; and a derivation unit configured to generate, based on the interference signal, two-dimensional tomographic image data indicating a correlation among a distance in a proceeding direction of welding of the welding portion, a depth of the welding, and an intensity of the interference signal, to extract specified depth tomographic image data within a specified range from the two-dimensional tomographic image data, and to derive a depth for each distance based on the intensity of the interference signal in the specified depth tomographic image data.
    Type: Application
    Filed: December 2, 2019
    Publication date: June 25, 2020
    Inventors: JUN YOKOYAMA, TAKASHI URASHIMA, DAICHI HIGASHI
  • Publication number: 20200119350
    Abstract: Provided is a positive electrode active material for a nonaqueous electrolyte secondary battery including a LiNi composite oxide having low internal resistance and excellent thermal stability. The positive electrode active material is obtained by performing a water washing process using a water spray on a LiNi composite oxide powder obtained by a firing step until the filtrate has an electric conductivity of 30 to 60 mS/cm, and then dried, where the LiNi composite oxide is represented by the composition formula (1): LibNi1?aM1aO2, where M1 represents at least one kind of element selected from transition metal elements other than Ni, group 2 elements, and group 13 elements, and 0.01?a?0.5, and 0.85?b?1.05.
    Type: Application
    Filed: June 25, 2018
    Publication date: April 16, 2020
    Inventors: Tomoko Nakayama, Jun Yokoyama, Tetsufumi Komukai
  • Publication number: 20200058938
    Abstract: Provided is a method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries, including: a water-washing step of mixing, with water, Li—Ni composite oxide particles represented by the formula: LizNi1?x?yCoxMyO2 and composed of primary particles and secondary particles formed by aggregation of the primary particles to water-wash it, and performing solid-liquid separation to obtain a washed cake; a mixing step of mixing a W compound powder free from Li with the washed cake to obtain a W-containing mixture; and a heat treatment step of heating the W-containing mixture, the heat treatment step including: a first heat treatment step of heating the W-containing mixture to disperse W on the surface of the primary particles; and subsequently, a second heat treatment step of heating it at a higher temperature than in the first heat treatment step to form a lithium tungstate compound on the surface of the primary particles.
    Type: Application
    Filed: October 23, 2019
    Publication date: February 20, 2020
    Inventors: Kentaro Kondo, Jun Yokoyama, Yuki Furuichi, Tetsufumi Komukai
  • Patent number: 10497936
    Abstract: Provided is a method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries, including: a water-washing step of mixing, with water, Li—Ni composite oxide particles represented by the formula: LizNi1-x-yCoxMyO2 and composed of primary particles and secondary particles formed by aggregation of the primary particles to water-wash it, and performing solid-liquid separation to obtain a washed cake; a mixing step of mixing a W compound powder free from Li with the washed cake to obtain a W-containing mixture; and a heat treatment step of heating the W-containing mixture, the heat treatment step including: a first heat treatment step of heating the W-containing mixture to disperse W on the surface of the primary particles; and subsequently, a second heat treatment step of heating it at a higher temperature than in the first heat treatment step to form a lithium tungstate compound on the surface of the primary particles.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: December 3, 2019
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Kentaro Kondo, Jun Yokoyama, Yuki Furuichi, Tetsufumi Komukai
  • Patent number: 10466729
    Abstract: To ensure the electricity storage amount of a power storage device in preparation for the peak period of power consumption when supplying power to a plurality of devices, a power management apparatus includes a controller that controls the plurality of devices that receive a distribution of total power supplied from the power storage device and another power supply, an acquirer that acquires the remaining electric energy of the power storage device, and a determiner that determines whether the remaining electric energy of the power storage device is not more than a first predetermined value. If the remaining electric energy of the power storage device is not more than the first predetermined value, the controller controls the plurality of devices such that the power from the other power supply is distributed to the power storage device.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: November 5, 2019
    Assignee: NEC Corporation
    Inventors: Jun Yokoyama, Hitoshi Takagi
  • Patent number: 10317959
    Abstract: A server device having a server module and a cooling fan in a chassis includes: a single management unit configured to control the server module and the cooling fan; and a monitoring unit configured to monitor the running status of the management unit. The monitoring unit is configured to execute thermal control of the inside of the chassis on the basis of the result of monitoring of the management unit.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: June 11, 2019
    Assignee: NEC CORPORATION
    Inventor: Jun Yokoyama