Patents by Inventor Toshikazu Kaihara

Toshikazu Kaihara 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: 20250105363
    Abstract: A secondary battery includes an electrode wound body and an outer package can containing the electrode wound body. The positive electrode includes a positive electrode current collector and first and second positive electrode active material layers. Each of the first and second positive electrode active material layers includes a first thin part and a first thick part having a thickness greater than that of the first thin part and being adjacent to the first thin part in a longitudinal direction. A position of a first border between the first thin part of the first positive electrode active material layer and the first thick part of the first positive electrode active material layer and a position of a second border between the first thin part of the second positive electrode active material layer and the first thick part of the second positive electrode active material layer are different from each other.
    Type: Application
    Filed: August 28, 2024
    Publication date: March 27, 2025
    Inventors: Toshikazu NAKAMURA, Kei WAKABAYASHI, Yosuke KAIHARA, Yukihiro OKAMOTO
  • Publication number: 20250105362
    Abstract: A secondary battery includes an electrode wound body and an outer package can containing the electrode wound body. The electrode wound body includes a stacked body including a positive electrode, a negative electrode, and a separator and being wound along a longitudinal direction thereof, and has a through hole in a width direction. The positive electrode includes a positive electrode current collector, and a positive electrode active material layer provided thereon. The positive electrode active material layer includes a first thin part, a thick part, and a second thin part. The thick part has a thickness greater than a thickness of the first thin part and is adjacent to the first thin part in the longitudinal direction. The second thin part has a thickness smaller than the thickness of the thick part and is positioned on an opposite side of the thick part to the first thin part.
    Type: Application
    Filed: August 28, 2024
    Publication date: March 27, 2025
    Inventors: Toshikazu NAKAMURA, Kei WAKABAYASHI, Yosuke KAIHARA, Yukihiro OKAMOTO
  • Publication number: 20250105364
    Abstract: A secondary battery includes an electrode wound body. The electrode wound body includes a stacked body including a positive electrode, a negative electrode, and a separator and wound along a longitudinal direction thereof, and has a through hole in a width direction. The positive electrode includes a positive electrode active material layer, and a positive electrode current collector including a positive electrode covered region and a positive electrode exposed region. The positive electrode covered region is covered with the positive electrode active material layer. The positive electrode exposed region is covered with no positive electrode active material layer and extends in the width direction from the positive electrode active material layer. The positive electrode active material layer includes a first thin part, and a first thick part having a thickness greater than that of the first thin part and being adjacent to the first thin part in the width direction.
    Type: Application
    Filed: September 13, 2024
    Publication date: March 27, 2025
    Inventors: Yosuke KAIHARA, Toshikazu NAKAMURA, Yukihiro OKAMOTO, Kei WAKABAYASHI
  • Publication number: 20250105250
    Abstract: A secondary battery includes a stacked body including a positive electrode, a negative electrode, and a separator. The positive electrode includes a positive electrode active material layer, a positive electrode current collector, and an insulating layer. The positive electrode current collector includes a positive electrode covered region and a positive electrode exposed region. The positive electrode exposed region is not covered with the positive electrode active material layer and extends in a width direction from the positive electrode active material layer. The insulating layer extends along a first edge of the positive electrode active material layer. The first edge is located at a border between the positive electrode covered region and the positive electrode exposed region. The positive electrode active material layer includes a first thin part and a first thick part that is adjacent to the first thin part in the width direction.
    Type: Application
    Filed: September 25, 2024
    Publication date: March 27, 2025
    Inventors: Toshikazu NAKAMURA, Kei WAKABAYASHI, Yosuke KAIHARA, Yukihiro OKAMOTO
  • Publication number: 20250105463
    Abstract: A secondary battery includes an electrode wound body and an outer package can containing the electrode wound body. The electrode wound body includes a stacked body including a positive electrode, a negative electrode, and a separator and being wound along a longitudinal direction thereof, and has a through hole provided through the electrode wound body in a width direction. The positive electrode includes a positive electrode current collector extending in both the longitudinal direction and the width direction, and a positive electrode active material layer provided thereon. The positive electrode active material layer includes a first thin part, a thick part, and a grooved part. The thick part has a thickness greater than a thickness of the first thin part and is adjacent to the first thin part in the longitudinal direction. The grooved part is positioned between the first thin part and the thick part.
    Type: Application
    Filed: August 28, 2024
    Publication date: March 27, 2025
    Inventors: Toshikazu NAKAMURA, Kei WAKABAYASHI, Yosuke KAIHARA, Yukihiro OKAMOTO
  • Patent number: 5192485
    Abstract: A continuous annealing line for annealing a cold-rolled strip of a ultra-low-carbon steel comprising a heating furnace for heating the strip which is fed continuously, with or without a soaking furnace following the heating furnace, a cooling furnace in which the heated steel strip is cooled, and a carburizing/nitriding furnace disposed between the heating furnace or the soaking furnace and the cooling furnace. The carburizing/nitriding furnace may be divided into a plurality of zones, each of which is provided with control means for controlling the carburizing/nitriding atmosphere and carburizing/nitriding temperature in the zone. The continuous annealing line may further comprise a plurality of carburizing/nitriding furnaces and have an arrangement for conducting a switching between a mode in which the carburizing/nitriding furnace is used for carburizing/nitriding the steel strip and a mode in which the carburizing/cooling furnace is used for cooling the steel strip.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: March 9, 1993
    Assignee: Kawasaki Steel Corp.
    Inventors: Koshi Kuramoto, Tsuguhiko Nakagawa, Satoshi Shibuya, Takao Ogawa, Toshikazu Kaihara, Kusuo Furukawa
  • Patent number: 4713154
    Abstract: In a method of continuously annealing and pickling steel strips successively transferred through a continuous annealing apparatus including heating and cooling zones and a pickling apparatus, annealing the steel strips is effected in reducing atmosphere and thereafter pickling is effected at least by nitric acid electrolytic treatment. In an apparatus for continuously annealing and pickling steel strips, including a continuous annealing furnace and a pickling apparatus, the continuous annealing furnace consists of vertical furnaces capable of advancing a steel strip in a manner substantially repeating upward and downward movements alternately in substantially vertical directions and the pickling apparatus comprises at least a nitric acid electrolytic cell.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: December 15, 1987
    Assignee: Kawasaki Steel Corporation
    Inventors: Norio Ohta, Fumiya Yanagishima, Toshikazu Kaihara, Akira Kishida, Kuniaki Sato, Masanobu Ochiai