Patents by Inventor Mayuko KOYAMA

Mayuko 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).

  • Method of manufacturing current collector electrode sheet, current collector electrode sheet, and battery
    Patent number: 11563207
    Abstract: Provided is a current collector electrode sheet (10) including a slurry application area (11) formed by intermittently applying and drying a slurry containing an active material and a non-application area (12), on both surfaces of a metal foil (9), in which the application area (11) and the non-application area (12) are alternately formed in a winding direction of the metal foil (9) having a strip shape, and, in a compression step of continuously compressing the slurry application area (11) and the non-application area (12) using a pair of compression rollers in a thickness direction of the current collector electrode sheet (10), an area which is not compressed by the compression rollers, is present in a tailing portion (14) at a terminal end (13) of each application area (11).
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: January 24, 2023
    Assignee: ENVISION AESC JAPAN LTD.
    Inventors: Dai Aya, Mayuko Koyama
  • POSITIVE ELECTRODE, LITHIUM ION SECONDARY BATTERY AND METHOD OF MANUFACTURING POSITIVE ELECTRODE SHEET
    Publication number: 20230006191
    Abstract: A positive electrode (100) includes a positive electrode current collector (110), a positive electrode mixture (120), and a mixture (130). The positive electrode current collector (110) has a first surface (112). The first surface (112) of the positive electrode current collector (110) includes a first region (112a), a second region (112b), and a third region (112c). The positive electrode (100) satisfies the following expression (1). 0?L3/(L1+L3)?0.075??(1) Here, L1 is a length of the positive electrode (100) of the first region (112a) of the positive electrode (100) in one direction (first direction (X)), and L3 is a length of the third region (112c) of the positive electrode (100) in the one direction (first direction (X)).
    Type: Application
    Filed: November 26, 2020
    Publication date: January 5, 2023
    Applicant: ENVISION AESC JAPAN LTD.
    Inventors: Koichi SHINOHARA, Shoichiro SHIRAISHI, Moeko SATO, Mikiya SAITOU, Yoshiki SATOU, Mayuko KOYAMA, Daisuke SUZUKI
  • METHOD OF MANUFACTURING CURRENT COLLECTOR ELECTRODE SHEET, CURRENT COLLECTOR ELECTRODE SHEET, AND BATTERY
    Publication number: 20200343532
    Abstract: Provided is a current collector electrode sheet (10) including a slurry application area (11) formed by intermittently applying and drying a slurry containing an active material and a non-application area (12), on both surfaces of a metal foil (9), in which the application area (11) and the non-application area (12) are alternately formed in a winding direction of the metal foil (9) having a strip shape, and, in a compression step of continuously compressing the slurry application area (11) and the non-application area (12) using a pair of compression rollers in a thickness direction of the current collector electrode sheet (10), an area which is not compressed by the compression rollers, is present in a tailing portion (14) at a terminal end (13) of each application area (11).
    Type: Application
    Filed: September 25, 2018
    Publication date: October 29, 2020
    Applicant: ENVISION AESC ENERGY DEVICES, LTD.
    Inventors: Dai AYA, Mayuko KOYAMA