Patents by Inventor Fumikazu Mizukoshi

Fumikazu Mizukoshi 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: 20220216475
    Abstract: The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery which is provided with a negative electrode mixture layer that exhibits excellent electrolyte absorbing properties.
    Type: Application
    Filed: April 14, 2020
    Publication date: July 7, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Takao Tsuda, Takuya Shinomiya, Takamitsu Tashita, Fumikazu Mizukoshi
  • Publication number: 20220166115
    Abstract: A cylindrical battery, as one example according to an embodiment of the present disclosure, is provided with: an electrode body formed by spirally winding a positive electrode and a negative electrode with a separator interposed therebetween; and a bottomed cylindrical exterior can for accommodating the electrode body. The negative electrode has a negative-electrode core body and a negative-electrode mixture layer provided on a surface of the negative-electrode core body. An exposed area in which the surface of the negative-electrode core body is exposed is formed on an outer circumferential surface of the electrode body, and the exposed area is in contact with the inner surface of the exterior can. The negative-electrode mixture layer contains, as a negative-electrode active material, graphite particles having an internal porosity of 5% or less and a fracture strength of 25-55 MPa.
    Type: Application
    Filed: February 5, 2020
    Publication date: May 26, 2022
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Naoya Morisawa, Shimpei Yamagami, Takamitsu Tashita, Fumikazu Mizukoshi
  • Publication number: 20220131131
    Abstract: The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery having excellent low-temperature properties. A non-aqueous electrolyte secondary battery according to an aspect of the present disclosure comprises a negative electrode having: a negative electrode current collector; and a negative electrode active material layer disposed on the negative electrode current collector, wherein the negative electrode active material layer contains graphite particles A and graphite particles B as a negative electrode active material. The internal porosity of graphite particles A is 8-20%, and the internal porosity of graphite particles B is 5% or less. When the negative electrode active material layer is bisected in the thickness direction into a negative electrode current collector-side first half region and an outer surface-side second half region, the amount of graphite particles A in the second half region is greater than in the first half region.
    Type: Application
    Filed: February 21, 2020
    Publication date: April 28, 2022
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Syunsuke Natsumeda, Takuya Shinomiya, Takamitsu Tashita, Fumikazu Mizukoshi
  • Publication number: 20210226213
    Abstract: The objective of the present disclosure is to provide a non-aqueous electrolyte secondary battery capable of suppressing an increase in man-hour for a compression process in the production of a negative electrode and also suppressing a deterioration in charge/discharge cycle characteristics. A non-aqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a negative electrode having a negative electrode active material layer, wherein: the negative electrode active material layer includes graphite particles A and graphite particles B as a negative electrode active material; the internal porosity of the graphite particles A is 5% or less, and the internal porosity of the graphite particles B is 8-20%; and the mass ratio of the graphite particles A to the graphite particles B is 70:30 to 90:10.
    Type: Application
    Filed: June 4, 2019
    Publication date: July 22, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Fumikazu Mizukoshi, Takamitsu Tashita, Takuya Shinomiya
  • Publication number: 20210218025
    Abstract: The purpose of the present disclosure is to provide a non-aqueous secondary battery that is able to suppress a decrease in charge-discharge cycle characteristics. The non-aqueous electrolyte secondary battery that is a mode of the present disclosure comprises a negative electrode having a negative electrode active material layer, wherein the negative electrode active material layer contains a negative electrode active material that contains graphite particles, and an SBR component selected from at least one of a styrene-butadiene copolymer rubber and a modified product thereof, the internal porosity of the graphite particles is 1% to 5%, the porosity due to voids between particles of the negative electrode active material layer is 10% to 20%, and the content of the SBR component is 1.5 mass % to 3 mass % with respect to the mass of the negative electrode active material.
    Type: Application
    Filed: June 4, 2019
    Publication date: July 15, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takamitsu Tashita, Takuya Shinomiya, Fumikazu Mizukoshi
  • Publication number: 20210159489
    Abstract: A non-aqueous electrolyte secondary cell comprising a negative electrode (12) having a negative electrode collector (40) and a negative electrode active material layer (42) provided on the negative electrode collector (40). The negative electrode active material layer (42) contains graphite particles A and graphite particles B as negative electrode active materials. The graphite particles A have an internal void rate of 5% or less. The graphite particles B have an internal void rate of 8 to 20%. When the negative electrode active material layer 42 is halved in the thickness direction, a region 42b on the half closer to the outer surface contains more graphite particles A than a region 42a on the half closer to the negative electrode collector.
    Type: Application
    Filed: March 8, 2019
    Publication date: May 27, 2021
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Junichi Sugaya, Takuya Shinomiya, Takamitsu Tashita, Fumikazu Mizukoshi, Tsukasa Gejo