Patents by Inventor Takaaki Matsui

Takaaki Matsui 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: 20210288308
    Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a positive electrode active material layer including a lithium-cobalt composite oxide. The lithium-cobalt composite oxide has a layered rock-salt crystal structure. The negative electrode includes a negative electrode active material layer including graphite. When the secondary battery is charged and discharged with an upper limit of a closed circuit voltage being set to 4.42 V or higher, a unit capacity (mAh/g) satisfies a condition represented by 168 mAh/g?unit capacity (mAh/g)?(?0.28Ă—area rate (%)+178) mAh/g.
    Type: Application
    Filed: May 28, 2021
    Publication date: September 16, 2021
    Inventors: Takaaki Matsui, Futoshi Sato, Keitaro Kitada, Taichi Katsumoto, Takuma Kawahara, Yuta Hirano, Taichi Kogure, Kazuki Honda, Shinji Hatake, Takashi Sato, Naoko Yamakawa
  • Publication number: 20210288322
    Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a lithium-cobalt composite oxide having a layered rock-salt crystal structure. The negative electrode includes graphite. An open circuit potential of the negative electrode measured in a full charge state is from 19 mV to 86 mV. A potential variation of the negative electrode is greater than or equal to 1 mV when the secondary battery is discharged from the full charge state by a capacity corresponding to 1% of a maximum discharge capacity. The maximum discharge capacity is obtained when the secondary battery is discharged with a constant current from the full charge state until the closed circuit voltage reaches 3.00 V, following which the secondary battery is discharged with a constant voltage of the closed circuit voltage of 3.00 V for 24 hours.
    Type: Application
    Filed: May 4, 2021
    Publication date: September 16, 2021
    Inventors: Keitaro KITADA, Futoshi SATO, Takaaki MATSUI, Taichi KOGURE, Aya MASHIKO, Yoshifumi SHIMIZU, Kazuki HONDA, Yuta HIRANO, Shinji HATAKE, Naoko YAMAKAWA, Moriaki OKUNO, Masahiro MIYAMOTO
  • Publication number: 20210265622
    Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a lithium-cobalt composite oxide having a layered rock-salt crystal structure. The negative electrode includes graphite. A potential variation of the positive electrode is greater than or equal to 2 mV when the secondary battery is discharged from a full charge state by a capacity corresponding to 1% of a maximum discharge capacity. The maximum discharge capacity is a discharge capacity obtained when the secondary battery is discharged with a constant current from the full charge state until the closed circuit voltage reaches 3.00 V, following which the secondary battery is discharged with a constant voltage of the closed circuit voltage of 3.00 V for 24 hours.
    Type: Application
    Filed: May 10, 2021
    Publication date: August 26, 2021
    Inventors: Futoshi SATO, Yoshifumi SHIMIZU, Taichi KOGURE, Aya MASHIKO, Takaaki MATSUI, Kazuki HONDA, Keitaro KITADA, Yuta HIRANO, Masayuki IWAMA, Asuki YANAGIHARA
  • Publication number: 20210257663
    Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a lithium-nickel composite oxide having a layered rock-salt crystal structure. The negative electrode includes graphite. An open circuit potential, versus a lithium reference electrode, of the negative electrode measured in a full charge state is from 19 mV to 86 mV. A potential variation of the negative electrode is greater than or equal to 1 mV when the secondary battery is discharged from the full charge state by a capacity corresponding to 1% of a maximum discharge capacity. The maximum discharge capacity is obtained when the secondary battery is discharged with a constant current from the full charge state until the closed circuit voltage reaches 2.00 V, following which the secondary battery is discharged with a constant voltage of the closed circuit voltage of 2.00 V for 24 hours.
    Type: Application
    Filed: May 5, 2021
    Publication date: August 19, 2021
    Inventors: Yuta HIRANO, Takaaki MATSUI, Kazuki HONDA, Keitaro KITADA, Futoshi SATO, Shinji HATAKE, Taichi KOGURE
  • Publication number: 20210167470
    Abstract: A secondary battery includes a wound electrode body. The wound electrode body includes a positive electrode, a negative electrode, and a separator. The positive electrode and the negative electrode are stacked on each other with the separator interposed therebetween and are wound about a winding axis. The wound electrode body has a section perpendicular to the winding axis. The section has an elongated shape that includes a flat part and a pair of curved parts. The curved parts oppose each other with the flat part interposed therebetween. The negative electrode includes a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector. A width of the wound electrode body, a wound-layer number of the wound electrode body, and a ratio of a second distance to a first distance satisfy at least one of Condition A and Condition B.
    Type: Application
    Filed: February 9, 2021
    Publication date: June 3, 2021
    Inventors: Takaaki MATSUI, Kazuki HONDA, Rikako IMOTO, Hideki NAKAI, Takashi SATO
  • Publication number: 20210167413
    Abstract: A secondary battery includes a wound electrode body having a positive electrode, a negative electrode, and a separator. The positive electrode and the negative electrode are stacked on each other with the separator interposed therebetween and are wound about a winding axis. The wound electrode body has a section perpendicular to the winding axis. The section has an elongated shape that includes a flat part and a pair of curved parts. The curved parts oppose each other with the flat part interposed therebetween. The negative electrode includes a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector. A ratio of a second distance to a first distance is less than 1.
    Type: Application
    Filed: February 9, 2021
    Publication date: June 3, 2021
    Inventors: Rikako IMOTO, Takaaki MATSUI, Hideki NAKAI
  • Patent number: 11022430
    Abstract: An eyeglass frame shape measurement device measures a shape of an eyeglass frame. The eyeglass frame shape measurement device includes a light projecting optical system that has a light source and emits a measurement light flux from the light source toward a groove of a rim of an eyeglass frame, a light receiving optical system that has a detector and causes the detector to receive a reflected light flux of the measurement light flux emitted toward the groove and reflected by the groove, an acquiring means section that acquires a cross-sectional shape of the groove based on the reflected light flux received by the detector, a change section that change a light receiving position of the reflected light flux, and a control section that control the change section to change the light receiving position of the reflected light flux so that the detector receives the reflected light flux.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: June 1, 2021
    Assignee: NIDEK CO., LTD.
    Inventors: Kyoji Takeichi, Michihiro Takii, Takaaki Matsui
  • Publication number: 20210095953
    Abstract: An eyeglass frame shape measurement device includes an optical measurement unit, a probe unit, a holding unit that holds the optical measurement unit and the probe unit, a changing portion that integrally moves the optical measurement unit and the probe unit with respect to an eyeglass frame to change a measurement position with respect to a groove of a rim of the eyeglass frame, and a controller that controls an operation of the eyeglass frame shape measurement device. The controller controls an operation of the changing portion to measure the groove of the rim of the eyeglass frame, acquires a cross-sectional shape of the groove of the rim of the eyeglass frame based on a detection result detected by the optical measurement unit, and acquires a shape of the rim of the eyeglass frame based on a detection result detected by the probe unit.
    Type: Application
    Filed: September 28, 2020
    Publication date: April 1, 2021
    Applicant: NIDEK CO., LTD.
    Inventors: Michihiro TAKII, Kyoji TAKEICHI, Yuya NAKAKO, Takaaki MATSUI
  • Patent number: 10950864
    Abstract: A battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes an active material having grains and a binder having a reticulated structure. In this battery, spaces between the grains of the active material are filled with the reticulated structure of the binder.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: March 16, 2021
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masumi Fukuda, Taichi Kogure, Takaaki Matsui, Yoshikazu Kato, Ami Onuma, Miki Miyazaki, Seiji Onoe
  • Patent number: 10873109
    Abstract: A secondary battery includes a cathode terminal; an anode terminal; a wound electrode body; and a step reducing member. The step reducing member is attached to one or both of a first cathode wound portion and a first anode wound portion in one or more of a first region, a second region and a third region. The first region is in a major axis direction outside the cathode terminal in a wound direction of a cathode, and the second region is in the major axis direction outside the anode terminal in the wound direction of an anode and the third region between the cathode terminal and the anode terminal.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: December 22, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takaaki Matsui, Takashi Kokubun, Kazuki Honda, Taichi Kogure, Naoko Yamakawa
  • Patent number: 10815982
    Abstract: A cryopump system includes at least one cryopump including a refrigerator including a low temperature cooling stage and a high temperature cooling stage, a low temperature cryopanel cooled by the low temperature cooling stage, and a high temperature cryopanel cooled by the high temperature cooling stage. A compressor unit includes a compressor main body that compresses a working gas supplied to the refrigerator, an operating frequency of the compressor main body being variable. The compressor unit is operated such that a pressure ratio between high pressure and low pressure of the compressor main body is in a range between 1.6 and 2.5.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: October 27, 2020
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventor: Takaaki Matsui
  • Publication number: 20200191560
    Abstract: An eyeglass frame shape measurement device measures a shape of an eyeglass frame. The eyeglass frame shape measurement device includes a light projecting optical system that has a light source and emits a measurement light flux from the light source toward a groove of a rim of an eyeglass frame, a light receiving optical system that has a detector and causes the detector to receive a reflected light flux of the measurement light flux emitted toward the groove and reflected by the groove, an acquiring means section that acquires a cross-sectional shape of the groove based on the reflected light flux received by the detector, a change section that change a light receiving position of the reflected light flux, and a control section that control the change section to change the light receiving position of the reflected light flux so that the detector receives the reflected light flux.
    Type: Application
    Filed: August 28, 2018
    Publication date: June 18, 2020
    Applicant: NIDEK CO., LTD.
    Inventors: Kyoji TAKEICHI, Michihiro TAKII, Takaaki MATSUI
  • Patent number: 10658650
    Abstract: A secondary battery includes at least: a laminated electrode body 20 in which an electrode member 21 and a separator 26 are laminated, in which a suppressing member 31A suppressing a movement of the separator 26 with respect to the electrode member 21 is disposed between a portion 21A of the electrode member 21 and a portion of the separator 26, in an uneven portion 27A existing in the laminated electrode body 20.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: May 19, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Koji Shibutani, Takaaki Matsui
  • Publication number: 20200112064
    Abstract: A battery includes a positive electrode having a first strip shape and a positive electrode lead, and a negative electrode having a second strip shape and a negative electrode lead. First ends of the positive electrode and the negative electrode in a longitudinal direction are on an inner peripheral side, and second ends of the positive electrode and the negative electrode in the longitudinal direction are on an outer peripheral side. The positive electrode lead and the negative electrode lead are extended out from a first end side in a width direction of the positive electrode and the negative electrode, and a first thickness of the positive electrode on the first end side is thinner than a second thickness of the positive electrode on a second end side in the width direction.
    Type: Application
    Filed: December 4, 2019
    Publication date: April 9, 2020
    Inventors: Takaaki MATSUI, Takashi KOKUBUN, Taichi KOGURE, Kazuki HONDA, Masumi FUKUDA, Naoko YAMAKAWA
  • Patent number: 10541389
    Abstract: A battery is provided. The battery includes a power generation element having a through hole; and a cylindrical can housing the power generation element and having at least one thin wall part on a circumferential surface of the cylindrical can. A ratio of a hole diameter of the through hole to an outer diameter of the power generation element is 17% or less. The thin wall part is provided in one or both of regions in a range from 0% to 30% and a range from 70% to 100% from one end of the circumferential surface.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: January 21, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Mitsuhiro Ue, Yoshihiro Dokko, Takaaki Matsui
  • Patent number: 10431821
    Abstract: A cathode active material includes a first cathode material configured of a layered rocksalt type lithium metal oxide, the layered rocksalt type lithium metal oxide including lithium and a metal other than lithium, the metal configured of nickel (Ni), or nickel (Ni) and the like. A site occupancy of metal ions other than lithium at a 3a site obtained by Rietveld analysis of a powder X-ray diffraction pattern of the first cathode material in a cathode in a discharged state is about 5% or less, and a site occupancy of metal ions other than the metal occupying a part of a 3b site at the 3b site is about 1% or over, and the cathode active material is covered with a coating film, and an exposed amount of the cathode active material exposed from the coating film is within a range from about 0.05% to about 8% both inclusive.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: October 1, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takaaki Matsui, Takehiko Ishii
  • Publication number: 20190288289
    Abstract: A battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes an active material having grains and a binder having a reticulated structure. In this battery, spaces between the grains of the active material are filled with the reticulated structure of the binder.
    Type: Application
    Filed: May 28, 2019
    Publication date: September 19, 2019
    Inventors: Masumi FUKUDA, Taichi KOGURE, Takaaki MATSUI, Yoshikazu KATO, Ami ONUMA, Miki MIYAZAKI, Seiji ONOE
  • Patent number: 10403882
    Abstract: The present invention provides a secondary battery-use active material that allows for an improvement in thermal stability after charge and discharge are repeated. The secondary battery-use active material of the present invention includes a cathode active material that includes (A) a main phase and a sub-phase, (B) the main phase containing a first lithium compound represented by LiaNibMcAldOe (where M is an element such as cobalt, and 0.8<a<1.2, 0.45?b?1, 0?c?1, 0?d?0.2, 0<e?1.98, (c+d)>0, and (b+c+d)?1), and (C) the sub-phase containing a second lithium compound that contains lithium, aluminum, and oxygen as constituent elements.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: September 3, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takaaki Matsui, Kyohei Ogawa, Masaki Kuratsuka
  • Patent number: 10280913
    Abstract: A cryopump system includes a cryopump, a compressor of a working gas for the cryopump, a control device configured to control an operation frequency of the compressor, a gas line connecting the cryopump and the compressor, and a gas quantity adjustment unit configured to switch a working gas quantity of the gas line between at least a first gas quantity and a second gas quantity. When the gas line has the first gas quantity, a controllable range of the operation frequency provides a first flow rate range of the working gas. When the gas line has the second gas quantity, the controllable range provides a second flow rate range of the working gas. The second flow rate range has a non-overlapping portion with the first flow rate range.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: May 7, 2019
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventor: Takaaki Matsui
  • Patent number: 10207714
    Abstract: Control device for continuously variable transmission has continuously variable transmission mechanism (CVT) transmitting power with belt (7) wound around primary and secondary pulley (5, 6); torque convertor (2) having pump impeller (20), turbine runner (21) and lock-up clutch (2a); and control unit (10) controlling lock-up clutch (2a) to predetermined engagement state and controlling the CVT to predetermined transmission ratio, according to travelling condition.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: February 19, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Seiichiro Takahashi, Hiroki Iwasa, Hironori Miyaishi, Sunghoon Woo, Takaaki Matsui, Tomoaki Honma, Yoshio Yasui, Yuta Suzuki, Masayuki Mannen, Susumu Saitou