Patents by Inventor Kunimitu YAMAMOTO

Kunimitu YAMAMOTO 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 nonaqueous secondary battery
    Patent number: 10249915
    Abstract: A method of manufacturing a nonaqueous secondary battery includes: constructing a battery assembly with a positive electrode, a negative electrode, and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution containing an unsaturated carbonate; activating the battery assembly to decompose a portion of the unsaturated carbonate such that a percentage of the unsaturated carbonate is adjusted to be 0.9 mass % or less with respect to 100 mass % of a total amount of the nonaqueous electrolytic solution; self-discharging the battery assembly to measure a voltage drop amount; and determining whether internal short-circuit occurs in the battery assembly based on the voltage drop amount.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: April 2, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yukiyoshi Ueno, Yuuichi Ito, Kunimitu Yamamoto, Junko Ohira
  • METHOD OF MANUFACTURING NONAQUEOUS SECONDARY BATTERY
    Publication number: 20170170530
    Abstract: A method of manufacturing a nonaqueous secondary battery includes: constructing a battery assembly with a positive electrode, a negative electrode, and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution containing an unsaturated carbonate; activating the battery assembly to decompose a portion of the unsaturated carbonate such that a percentage of the unsaturated carbonate is adjusted to be 0.9 mass % or less with respect to 100 mass % of a total amount of the nonaqueous electrolytic solution; self-discharging the battery assembly to measure a voltage drop amount; and determining whether internal short-circuit occurs in the battery assembly based on the voltage drop amount.
    Type: Application
    Filed: July 10, 2015
    Publication date: June 15, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yukiyoshi UENO, Yuuichi ITO, Kunimitu YAMAMOTO, Junko OHIRA