Patents by Inventor Tomoki Shiozaki

Tomoki Shiozaki 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: 20210013516
    Abstract: This positive electrode includes: a positive electrode current collector; a positive electrode mixed material layer that is formed on at least one surface of the positive electrode current collector; and a protective layer which includes an insulating inorganic compound and a conductive material, and is interposed between the positive electrode current collector and the positive electrode mixed material layer. The protective layer includes secondary particles comprising agglomerated primary particles of the inorganic compound. The median value of the particle size of the secondary particles is 30 ?m or less.
    Type: Application
    Filed: January 15, 2019
    Publication date: January 14, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kohei Saito, Takahiro Takahashi, Hideharu Takezawa, Tomoki Shiozaki
  • Publication number: 20200373582
    Abstract: A nonaqueous electrolyte secondary battery with a positive electrode having a positive electrode current collector and a positive electrode active material layer that is supported by a first main surface and a second main surface. The first main surface includes a first exposed section on which the positive electrode active material layer is not arranged. A positive electrode lead is connected to the first exposed section and includes an extension section and an overlapping section. At least a portion of the first exposed section, along with at least a portion of the overlapping section, is covered with a positive electrode insulating tape which has a base, a first layer that adheres to the first exposed section and to the overlapping section, and a second layer interposed between the base and the first layer; and the second layer expands when heated above a threshold.
    Type: Application
    Filed: July 5, 2018
    Publication date: November 26, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hajime Nishino, Satoko Motomatsu, Kazuhiro Yoshii, Takao Sato, Tomoki Shiozaki
  • 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: 20200144604
    Abstract: This secondary battery positive electrode includes: a positive electrode current collector; an intermediate layer provided on the positive electrode current collector; and a positive electrode mixture layer provided on the intermediate layer and including a positive electrode active material, wherein the intermediate layer includes a conductive material, a metal phosphate, and an inorganic compound which is not a metal phosphate and has a lower oxidizing power than the positive electrode active material.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 7, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takahiro Takahashi, Hideharu Takezawa, Tomoki Shiozaki
  • Publication number: 20200119362
    Abstract: This positive electrode is provided with: a positive electrode current collector, a protective layer which is formed on the positive electrode current collector and contains a silicone resin and a conductive material; and a positive electrode mixture layer which is formed on the protective layer and contains a positive electrode active material that is configured from a lithium-containing transition metal oxide.
    Type: Application
    Filed: December 13, 2019
    Publication date: April 16, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Daisuke Furusawa, Hideharu Takezawa, Tomoki Shiozaki
  • Patent number: 10615419
    Abstract: A positive electrode for nonaqueous electrolyte secondary batteries having a positive electrode current collector and a positive electrode mixture layer that is formed on the positive electrode current collector.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: April 7, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yasunari Sugita, Tomoki Shiozaki, Kazuki Endo
  • Publication number: 20200099057
    Abstract: This 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: a first intermediate layer that includes a non-oxide conductive inorganic compound and a positive-electrode active material; and a second intermediate layer that includes an insulating inorganic material and a non-oxide conductive inorganic compound. The conductive inorganic compound becomes an insulating oxide at 300° C. or above.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takahito Nakayama, Tomoki Shiozaki, Hideharu Takezawa
  • Publication number: 20200091515
    Abstract: A positive electrode with a positive electrode current collector and a positive electrode mixture layer, and the positive electrode mixture layer has first and second positive electrode mixture layers. The first positive electrode mixture layer comprises a positive electrode active material composed of compound A that contains Ni, Co, Al and Li. The second positive electrode mixture layer is disposed between the first positive electrode mixture layer and the positive electrode current collector, and comprises a positive electrode active material including: said compound A; and a Li-containing compound B which is smaller in specific capacity (mAh/g) and average particle diameter than said compound A. In said compound A, a ratio of Ni to the total number of moles of the metal elements except Li is 82 mol % or more. The average particle diameter of said compound B is 55% or less of the average particle diameter of said compound A.
    Type: Application
    Filed: November 20, 2019
    Publication date: March 19, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hideharu Takezawa, Tomoki Shiozaki
  • 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: 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: 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
  • Patent number: 10535879
    Abstract: A positive electrode for a non-aqueous electrolyte secondary battery, comprising: a positive electrode current collector and a positive electrode active substance layer formed upon the positive electrode current collector. The positive electrode active substance layer has a positive electrode active substance and a melamine-acid salt being a salt comprising melamine and acid.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: January 14, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Tomoki Shiozaki, Yasunari Sugita, Kazuki Endo
  • 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: 20190386285
    Abstract: A positive electrode for this non-aqueous electrolyte secondary battery is provided with: a positive electrode current collector; a positive electrode active material layer formed on the positive electrode current collector; a positive electrode tab connected to an exposed portion at which the positive electrode current collector is exposed and on which the positive electrode active material layer is not formed; and a protective layer covering the exposed portion and the positive electrode tab on the exposed portion. The protective layer is composed of a base material including a curable resin.
    Type: Application
    Filed: August 19, 2019
    Publication date: December 19, 2019
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takahiro Takahashi, Tomoki Shiozaki
  • Patent number: 10505218
    Abstract: A positive electrode in a lithium secondary battery includes an insulating tape that covers a welded part between a positive electrode tab and a positive electrode current collector-exposed surface. The insulating tape has a multilayer structure including an organic material layer, a composite material layer containing 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.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: December 10, 2019
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Takeshi Ishikawa, Tomoki Shiozaki, Mineyasu Aoto
  • 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: 20190140269
    Abstract: A positive electrode for a nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes a positive electrode current collector mainly composed of aluminum (Al), a protective layer disposed on the positive electrode current collector, and a positive electrode mixture layer containing a lithium-containing transition metal oxide and disposed on the protective layer. The protective layer has a thickness of 1 to 5 ?m and contains an electroconductive material and an inorganic compound having an oxidation power lower than that of the lithium-containing transition metal oxide.
    Type: Application
    Filed: January 2, 2019
    Publication date: May 9, 2019
    Inventors: Tomoki SHIOZAKI, Kazuki ENDO, Yasunari SUGITA