Patents by Inventor Shota Koyama

Shota Koyama 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).

  • Cylindrical non-aqueous electrolyte secondary cell
    Patent number: 12381297
    Abstract: The secondary cell—includes an exterior can, a sealing body closing one end of the exterior can, an electrode group disposed inside the exterior can, and an insulating plate disposed between the sealing body and the electrode group. In the electrode group, a positive electrode and a negative electrode are wound in a spiral shape with a separator interposed between. The insulating plate is shaped as a disc having a lead hole penetrated by a positive electrode lead drawn out from the electrode group, and a center hole penetrating the center part of the insulating plate. The outer edge of the lead hole includes a curve part positioned along an arc that is concentric with respect to the outer circumference of the insulating plate as seen in plan view, and linear parts-positioned along a chord linking the two ends of the arc.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: August 5, 2025
    Assignees: PANASONIC ENERGY CO., LTD., PANASONIC HOLDINGS CORPORATION
    Inventors: Shota Koyama, Tomohiko Yokoyama, Ryo Kashimura, Satoru Mihara, Ryota Okimoto
  • CYLINDRICAL NON-AQUEOUS ELECTROLYTE SECONDARY CELL
    Publication number: 20220416380
    Abstract: The secondary cell—includes an exterior can, a sealing body closing one end of the exterior can, an electrode group disposed inside the exterior can, and an insulating plate disposed between the sealing body and the electrode group. In the electrode group, a positive electrode and a negative electrode are wound in a spiral shape with a separator interposed between. The insulating plate is shaped as a disc having a lead hole penetrated by a positive electrode lead drawn out from the electrode group, and a center hole penetrating the center part of the insulating plate. The outer edge of the lead hole includes a curve part positioned along an arc that is concentric with respect to the outer circumference of the insulating plate as seen in plan view, and linear parts-positioned along a chord linking the two ends of the arc.
    Type: Application
    Filed: June 24, 2020
    Publication date: December 29, 2022
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Shota Koyama, Tomohiko Yokoyama, Ryo Kashimura, Satoru Mihara, Ryota Okimoto