Patents by Inventor Yoshinori WAKUI

Yoshinori WAKUI 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).

  • Negative electrode for lithium ion secondary battery, lithium ion secondary battery, battery pack, electric vehicle, power storage system, power tool, and electronic device
    Patent number: 11532821
    Abstract: A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode has a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector. The negative electrode current collector satisfies: (D2/D1)?0.968??(1), D2?21.947*(X/100)?24.643??(2), 110?X?125??(3), and where D1 is a first displacement amount in a first piercing test at a first piercing speed of 0.1 mm/min or more; D2 is a second displacement amount in a second piercing test at a second piercing speed of less than 0.1 mm/min; and X is an expansion coefficient (%) of the negative electrode active material layer.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: December 20, 2022
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yoshinori Wakui, Koji Morita, Hirotaka Fukudome
  • BATTERY, BATTERY MODULE, BATTERY PACK, VEHICLE, ELECTRICITY STORAGE SYSTEM, ELECTRIC TOOL AND ELECTRONIC DEVICE
    Publication number: 20200176748
    Abstract: It is an object to provide a battery and a battery module having excellent reliability. There is provided a battery including a battery element, an exterior body that covers the battery element, and a conductor, in which the conductor is disposed outside the battery element, and the conductor has a cut portion, and there is further provided a battery module including a plurality of batteries and a conductor, in which each of the batteries includes a battery element and an exterior body that covers the battery element, the conductor is disposed outside the battery element, and the conductor has a cut portion.
    Type: Application
    Filed: January 3, 2020
    Publication date: June 4, 2020
    Inventors: Natsuko KATASE, Nobuyuki IWANE, Yoshinori WAKUI, Takahisa ISHIMATSU, Masato YANO
  • NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, LITHIUM ION SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, POWER STORAGE SYSTEM, POWER TOOL, AND ELECTRONIC DEVICE
    Publication number: 20190214649
    Abstract: A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode has a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector. The negative electrode current collector satisfies: (D2/D1)?0.968 ??(1), D2?21.947*(X/100)?24.643 ??(2), 110?X?125 ??(3), and where D1 is a first displacement amount in a first piercing test at a first piercing speed of 0.1 mm/min or more; D2 is a second displacement amount in a second piercing test at a second piercing speed of less than 0.1 mm/min; and X is an expansion coefficient (%) of the negative electrode active material layer.
    Type: Application
    Filed: March 15, 2019
    Publication date: July 11, 2019
    Inventors: Yoshinori WAKUI, Koji MORITA, Hirotaka FUKUDOME