Patents by Inventor Syunsuke Natsumeda

Syunsuke Natsumeda 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: 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: 20210091381
    Abstract: A nonaqueous electrolyte secondary battery using a silicon compound as a negative electrode active material, suppress deformation of a negative electrode. An embodiment includes a winding type electrode body in which a positive electrode and a negative electrode are spirally wound with at least one separator interposed therebetween. In a negative electrode mixture layer, a silicon compound is contained as a negative electrode active material. A winding-start side end of the negative electrode mixture layer extends to a winding-start end side of the electrode body past a winding-start side end of a positive electrode mixture layer. A length Y (mm) of a portion of the negative electrode mixture layer extending from the winding-start side end of the positive electrode mixture layer and a rate X (percent by mass) of the silicon compound with respect to the total mass of the negative electrode active material satisfy a relationship of Y?3X?15 (6?X?15).
    Type: Application
    Filed: December 6, 2018
    Publication date: March 25, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Mitsunori Miyanari, Syunsuke Natsumeda, Kei Kobayashi, Atsushi Mizawa