Patents by Inventor Yasufumi Minato

Yasufumi Minato 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: 20120208056
    Abstract: A battery including: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead joined to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.
    Type: Application
    Filed: April 25, 2012
    Publication date: August 16, 2012
    Applicant: SONY CORPORATION
    Inventors: Kumiko Takagi, Fumiko Hashimoto, Akira Yamaguchi, Yuzuru Fukushima, Hiroshi Inoue, Yasufumi Minato
  • Patent number: 8168320
    Abstract: A battery including: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead joined to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: May 1, 2012
    Assignee: Sony Corporation
    Inventors: Kumiko Takagi, Fumiko Hashimoto, Akira Yamaguchi, Yuzuru Fukushima, Hiroshi Inoue, Yasufumi Minato
  • Publication number: 20100291425
    Abstract: A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.
    Type: Application
    Filed: July 23, 2010
    Publication date: November 18, 2010
    Applicant: SONY CORPORATION
    Inventors: Kumiko TAKAGI, Fumiko HASHIMOTO, Akira YAMAGUCHI, Yuzuru FUKUSHIMA, Hiroshi INOUE, Yasufumi MINATO
  • Patent number: 7807292
    Abstract: A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: October 5, 2010
    Assignee: Sony Corporation
    Inventors: Kumiko Takagi, Fumiko Hashimoto, Akira Yamaguchi, Yuzuru Fukushima, Hiroshi Inoue, Yasufumi Minato
  • Publication number: 20080280193
    Abstract: A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.
    Type: Application
    Filed: May 10, 2007
    Publication date: November 13, 2008
    Applicant: Sony Corporation
    Inventors: Kumiko Takagi, Fumiko Hashimoto, Akira Yamaguchi, Yuzuru Fukushima, Hiroshi Inoue, Yasufumi Minato
  • Patent number: 5631100
    Abstract: A secondary battery is comprising an organic electrolytic solution contained in a casing and, disposed therein, a positive electrode comprised of a lithium-containing composite metal oxide as a cathode active material and a negative electrode comprised of a carbonaceous material as an anode active material, wherein the positive and negative electrodes are separated through a separator disposed therebetween and wherein the organic electrolytic solution has a water content of from 5 ppm to 450 ppm.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: May 20, 1997
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akira Yoshino, Yumiko Takizawa, Akira Koyama, Katsuhiko Inoue, Masataka Yamashita, Yasufumi Minato, Isao Kuribayashi