Patents by Inventor Satoru HIRAKAWA

Satoru HIRAKAWA 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: 20200295397
    Abstract: Disclosed herein is a lithium secondary battery that includes an electrode assembly having a weight energy density of 250 Wh/Kg or more, and a heat exhaust layer provided on a surface of the electrode assembly. The electrode assembly has a structure in which a positive electrode and a negative electrode are alternately stacked through a separator. The positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on a surface of the positive electrode current collector. The negative electrode including a negative electrode current collector and a negative electrode active material layer formed on a surface of the negative electrode current collector.
    Type: Application
    Filed: March 5, 2020
    Publication date: September 17, 2020
    Applicant: TDK CORPORATION
    Inventors: Satoru HIRAKAWA, Yasuhiro TAKAGI, Tohru INOUE
  • Publication number: 20200144668
    Abstract: In a lithium ion secondary battery including a positive electrode including a positive electrode active material containing a lithium nickel complex oxide, a cyclic sulfonic acid ester (al) which contains at least two sulfonyl groups in a molecule and a compound (a2) which contains only one sulfonyl group in a molecule and of which an energy level of a highest occupied molecular orbital calculated by a PM3 method is ?11.2 eV or less are used in an electrolyte. In addition, by charging such a battery, a film including a sulfur atom is formed on at least a portion of a surface of the positive electrode active material.
    Type: Application
    Filed: April 9, 2018
    Publication date: May 7, 2020
    Applicant: ENVISION AESC ENERGY DEVICES LTD.
    Inventors: Hideaki SASAKI, Satoru HIRAKAWA
  • Publication number: 20200101914
    Abstract: A vehicle body rear structure includes: a pair of left and right rear side frames extending in a fore-and-aft direction in a rear part of a vehicle; a rear subframe attached to the rear side frames; and a pair of left and right shock-absorbing structures respectively provided at rear ends of the rear side frames and extending rearward. The rear subframe includes a pair of left and right rear subframe longitudinal members extending in the fore-and-aft direction and a rear subframe cross member extending laterally and joined to the left and right rear subframe longitudinal members. The rear subframe cross member includes a protrusion that protrudes rearward in a laterally central part thereof. A rear end of the protrusion is positioned more rearward than the rear ends of the rear side frames and more forward than rear ends of the shock-absorbing structures.
    Type: Application
    Filed: September 12, 2019
    Publication date: April 2, 2020
    Inventors: Kazuhiro SAKAI, Tadashi HIRAKAWA, Takashi YAMADA, Satoru NOGUCHI, Seiichi KATO, Kanji KANEKO
  • Publication number: 20200028212
    Abstract: Provided is a lithium ion secondary battery including a positive electrode which is capable of storing and releasing lithium, a negative electrode which is capable of storing and releasing lithium, and a nonaqueous electrolyte which contains lithium salts and cyclic disulfonic acid ester, in which as the nonaqueous electrolyte, a nonaqueous electrolyte containing a polymer is used, and as at least a part of the lithium salts, imide lithium salts are used. Here, the content of the cyclic sulfonic acid ester is preferably in a range of 2.0% to 5.0% by mass with respect to a total content of the nonaqueous electrolyte. Also, the proportion of the imide lithium salts is preferably in a range of 10 to 50 mol % with respect to a total amount of lithium salts in the nonaqueous electrolyte.
    Type: Application
    Filed: February 9, 2018
    Publication date: January 23, 2020
    Applicant: Envision AESC Energy Devices Ltd.
    Inventors: Satoru HIRAKAWA, Hideaki SASAKI