Patents by Inventor Yuji Oura

Yuji Oura 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: 20200152990
    Abstract: This positive electrode for secondary batteries is provided with: a positive electrode collector which has a plurality of recesses and projections in the surface; an intermediate layer provided on the surface of the positive electrode collector having the recesses and projections; and a positive electrode mixture layer provided on the intermediate layer and contains a positive electrode active material. This positive electrode being configured such that: the intermediate layer contains conductive material particles and inorganic material particles that have a higher resistance than the positive electrode active material: and both the ratio of the central particle diameter of the conductive material particles to the average depth of the recesses and projections of the positive electrode collector and the ratio of the central particle diameter of the inorganic material particles to the average depth of the recesses and projections of the positive electrode collector are 5:6 or less.
    Type: Application
    Filed: January 16, 2020
    Publication date: May 14, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yuji Oura, Tomoki Shiozaki, Hideharu Takezawa
  • Publication number: 20200052303
    Abstract: Provided is a secondary battery comprising a positive electrode, a negative electrode, and an electrolyte. The positive electrode is provided with a positive electrode collector, a positive electrode mix layer containing positive electrode active substance particles, and an intermediate layer disposed between the positive electrode collector and positive electrode mix layer. The intermediate layer contains a conductor and a cured product of a curable resin having at least one selected from a glycidyl, hydroxy, carboxyl, amino, acryloyl, and methacryloyl groups.
    Type: Application
    Filed: October 22, 2019
    Publication date: February 13, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takahiro Takahashi, Takahito Nakayama, Tomoki Shiozaki, Hideharu Takezawa, Daisuke Furusawa, Yuji Oura
  • Publication number: 20200052348
    Abstract: A secondary battery positive electrode is provided with: a positive electrode current collector; a positive electrode mixture layer; and an intermediate layer disposed between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer comprises first particles configured from an electrically conductive material, and second particles which are configured from an insulating inorganic material and have an average grain size greater than an average grain size of the first particles. The volume ratio of the first particles in the intermediate layer is not less than 25% and less than 70%. The volume ratio of the second particles in the intermediate layer is not less than 30% and less than 75%. The density of the intermediate layer is greater than 1 g/cm3 and not more than 2.5 g/cm3.
    Type: Application
    Filed: October 22, 2019
    Publication date: February 13, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yuji Oura, Tomoki Shiozaki, Hideharu Takezawa, Takahito Nakayama, Takahiro Takahashi, Daisuke Furusawa
  • Publication number: 20200020924
    Abstract: A positive electrode is disclosed including a positive electrode collector containing aluminum, a positive electrode mixture layer containing a positive electrode active substance constituted from a lithium transition metal oxide, and a protective layer provided between the positive electrode collector and the positive electrode mixture layer. The protective layer contains inorganic compound particles and a conductive material, and has a recessed structure wherein the positive electrode mixture layer is recessed into the protective layer.
    Type: Application
    Filed: September 24, 2019
    Publication date: January 16, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hideharu Takezawa, Daisuke Furusawa, Yuji Oura, Takahiro Takahashi, Takahito Nakayama, Tomoki Shiozaki
  • Publication number: 20200020921
    Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector; a positive electrode active material layer which contains a positive electrode active material that is configured from a lithium transition metal oxide; a protective layer which is arranged between the positive electrode current collector and the positive electrode active material layer; and a positive electrode tab which is bonded with the positive electrode current collector at a positive electrode tab bonding part where the positive electrode active material layer and the protective layer are not formed so that the positive electrode current collector is exposed. An end edge of the positive electrode active material layer facing the positive electrode tab and an end edge of the protective layer facing the positive electrode tab are arranged in different positions in the longitudinal direction of the positive electrode.
    Type: Application
    Filed: September 25, 2019
    Publication date: January 16, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tomoki Shiozaki, Daisuke Furusawa, Yuji Oura, Takahiro Takahashi, Takahito Nakayama, Hideharu Takezawa
  • Publication number: 20200020950
    Abstract: A positive electrode used in a secondary cell that is an example of the present embodiment is provided with a positive electrode collector, an intermediate layer formed on the positive electrode collector, and a positive electrode mixture layer formed on the intermediate layer. The positive electrode mixture layer has a thermally expandable material and a positive electrode active material. The thermally expandable material content of the positive electrode mixture layer is at least 0.1% by mass and less than 5% by mass. The intermediate layer has an insulating inorganic material and a conductive agent. The insulating inorganic material content of the intermediate layer is 80-99% by mass.
    Type: Application
    Filed: September 24, 2019
    Publication date: January 16, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takahito Nakayama, Tomoki Shiozaki, Hideharu Takezawa, Daisuke Furusawa, Yuji Oura, Takahiro Takahashi
  • Publication number: 20200020951
    Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector which contains aluminum; a positive electrode mixture layer which contains a positive electrode active material that is configured of a lithium transition metal oxide; and an intermediate layer which is arranged between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer contains inorganic compound particles, a conductive material and a binder; the circularity is from 5% to 75% (inclusive); the void fraction of the intermediate layer is from 30% to 69% (inclusive); and the average circularity of the inorganic compound particles is from 5% to 75% (inclusive).
    Type: Application
    Filed: September 25, 2019
    Publication date: January 16, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Daisuke Furusawa, Tomoki Shiozaki, Hideharu Takezawa, Takahito Nakayama, Yuji Oura, Takahiro Takahashi
  • Publication number: 20200006778
    Abstract: A positive electrode is provided with: a positive electrode current collector constituted of aluminum as the main component; a positive electrode mixture layer formed on the positive electrode current collector aid containing a lithium-containing transition metal oxide; and a protective layer interposed between the positive electrode current collector and the positive electrode mixture layer. The protective layer contains inorganic particles, a conductive agent, and a binder material. In the positive electrode, the peel strength between the positive electrode current collector and the protective layer is higher than the peel strength between the protective layer and the positive electrode mixture layer.
    Type: Application
    Filed: September 12, 2019
    Publication date: January 2, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kazuki Endo, Tomoki Shiozaki, Yuji Oura
  • Publication number: 20190157650
    Abstract: According to the present invention, a positive electrode of a lithium secondary battery is provided with an insulating tape that covers an electrode tab on an exposed part. This insulating tape has a multilayer structure that is composed of an organic material layer, a composite material layer which is formed from an organic material and an inorganic material, and an adhesive layer. The inorganic material in the composite material layer accounts for 20% or more of the weight of the composite material layer; and the inorganic material contains at least one substance selected from the group consisting of metal oxides, metal nitrides, metal fluorides and metal carbides. Puncture strength is ensured by means of the organic material layer, while heat resistance is ensured by means of the composite material layer.
    Type: Application
    Filed: January 22, 2019
    Publication date: May 23, 2019
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yuji Oura, Takahiro Takahashi, Tomoki Shiozaki, Hajime Nishino
  • Publication number: 20180375083
    Abstract: A nonaqueous electrolyte secondary battery includes an insulating tape which covers at least a portion of an exposed portion of a current collector, together with at least a portion of a lead. The insulating tape has a substrate layer and a first adhesive layer, and the substrate layer has a first organic layer and a second organic layer interposed between the first organic layer and the first adhesive layer. The elastic modulus E1 of the first organic layer is lower than the elastic modulus E2 of the second organic layer.
    Type: Application
    Filed: August 3, 2018
    Publication date: December 27, 2018
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takahiro Takahashi, Tomoki Shiozaki, Yuji Oura
  • Publication number: 20180342726
    Abstract: In a nonaqueous electrolyte secondary battery, an insulating tape which covers at least a portion of an exposed portion of a current collector, together with at least a portion of a lead, has a substrate layer and a first adhesive layer, and the substrate layer has a first organic layer and a second organic layer interposed between the first organic layer and the first adhesive layer. The elastic modulus E2 of the second organic layer is lower than the elastic modulus E1 of the first organic layer, and the melting point or thermal decomposition temperature MP1 of the first organic layer is higher than the melting point or thermal decomposition temperature MP2 of the second organic layer.
    Type: Application
    Filed: August 2, 2018
    Publication date: November 29, 2018
    Applicant: Panasonic Intellectual Property Management Co., Lt d.
    Inventors: Takahiro Takahashi, Tomoki Shiozaki, Yuji Oura
  • Publication number: 20180159136
    Abstract: A secondary battery includes: a positive electrode having a positive-electrode current collector and a positive-electrode active-material layer; a negative electrode having a negative-electrode current collector and a negative-electrode active-material layer; a electrolyte; and an insulating tape covering a portion of the positive electrode. Furthermore, the positive-electrode current collector has an exposed section that the positive-electrode active-material layer is not disposed. In addition, at least a portion of the exposed section is covered with the insulating tape; the insulating tape has a substrate material layer and an adhesive layer; and the adhesive layer includes an adhesive agent and an insulating inorganic material.
    Type: Application
    Filed: February 1, 2018
    Publication date: June 7, 2018
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tomoki Shiozaki, Yuji Oura, Hajime Nishino
  • Publication number: 20180131034
    Abstract: A secondary battery includes a positive electrode having a positive electrode current collector and a positive electrode active material layer; a negative electrode having a negative electrode current collector and a negative electrode active material layer; a separator interposed between the electrodes; a electrolyte; a positive electrode lead; and an insulating tape that covers part of the positive electrode. The positive electrode current collector has an exposed portion connected to the positive electrode lead. The positive electrode lead has an extending portion that projects from the exposed portion and an overlapping portion that overlaps the exposed portion. At least part of the exposed portion and at least part of the overlapping portion are covered with the insulating tape. The insulating tape has a substrate layer and an adhesive layer. The substrate layer contains a polyimide. The adhesive layer has an electrical resistance of 1 k?/mm2 or more at 500° C.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 10, 2018
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuji Oura, Tomoki Shiozaki
  • Patent number: 9016122
    Abstract: A dust-proof structure for a measuring tool, includes: a case provided with an opening formed through a surface opposed to a protection plate thereof; a solar panel accommodated in the case through the opening of the case; an intermediate panel pressing an outer circumferential portion of the solar panel against a bottom wall of the case; a display device disposed at an inward portion of the intermediate panel and opposed to the solar panel with a gap; a cover attached to close the opening of the case; a screw used to secure the cover and the intermediate panel to the case; and a temporary-fixing unit disposed between the intermediate panel and the case, the temporary-fixing unit temporarily fixing the intermediate panel to the case while the outer circumferential portion of the solar panel is pressed against the bottom wall of the case.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: April 28, 2015
    Assignee: Mitutoyo Corporation
    Inventors: Rie Arai, Shuji Hayashida, Yuji Oura
  • Publication number: 20140102192
    Abstract: A dust-proof structure for a measuring tool, includes: a case provided with an opening formed through a surface opposed to a protection plate thereof; a solar panel accommodated in the case through the opening of the case; an intermediate panel pressing an outer circumferential portion of the solar panel against a bottom wall of the case; a display device disposed at an inward portion of the intermediate panel and opposed to the solar panel with a gap; a cover attached to close the opening of the case; a screw used to secure the cover and the intermediate panel to the case; and a temporary-fixing unit disposed between the intermediate panel and the case, the temporary-fixing unit temporarily fixing the intermediate panel to the case while the outer circumferential portion of the solar panel is pressed against the bottom wall of the case.
    Type: Application
    Filed: December 26, 2013
    Publication date: April 17, 2014
    Applicant: MITUTOYO CORPORATION
    Inventors: Rie ARAI, Shuji HAYASHIDA, Yuji OURA
  • Patent number: 8689628
    Abstract: A dust-proof structure for a measuring tool, includes: a case provided with an opening formed through a surface opposed to a protection plate thereof; a solar panel accommodated in the case through the opening of the case; an intermediate panel pressing an outer circumferential portion of the solar panel against a bottom wall of the case; a display device disposed at an inward portion of the intermediate panel and opposed to the solar panel with a gap; a cover attached to close the opening of the case; a screw used to secure the cover and the intermediate panel to the case; and a temporary-fixing unit disposed between the intermediate panel and the case, the temporary-fixing unit temporarily fixing the intermediate panel to the case while the outer circumferential portion of the solar panel is pressed against the bottom wall of the case.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: April 8, 2014
    Assignee: Mitutoyo Corporation
    Inventors: Rie Arai, Shuji Hayashida, Yuji Oura
  • Publication number: 20120272729
    Abstract: A dust-proof structure for a measuring tool, includes: a case provided with an opening formed through a surface opposed to a protection plate thereof; a solar panel accommodated in the case through the opening of the case; an intermediate panel pressing an outer circumferential portion of the solar panel against a bottom wall of the case; a display device disposed at an inward portion of the intermediate panel and opposed to the solar panel with a gap; a cover attached to close the opening of the case; a screw used to secure the cover and the intermediate panel to the case; and a temporary-fixing unit disposed between the intermediate panel and the case, the temporary-fixing unit temporarily fixing the intermediate panel to the case while the outer circumferential portion of the solar panel is pressed against the bottom wall of the case.
    Type: Application
    Filed: April 16, 2012
    Publication date: November 1, 2012
    Applicant: MITUTOYO CORPORATION
    Inventors: Rie ARAI, Shuji HAYASHIDA, Yuji OURA
  • Patent number: D653572
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: February 7, 2012
    Assignee: Mitutoyo Corporation
    Inventors: Shigeru Ohtani, Kenji Iwamoto, Rie Arai, Aki Hiroshima, Yuji Oura, Takefumi Kiwada, Makoto Furuta
  • Patent number: D792251
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: July 18, 2017
    Assignee: MITUTOYO CORPORATION
    Inventors: Sadayuki Matsumiya, Shigeru Ohtani, Yuji Oura