Patents by Inventor Koichi Fukuoka

Koichi Fukuoka 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).

  • CHARGING CONTROLLER, RECHARGEABLE BATTERY, ELECTRONIC DEVICE, AND CONTROL METHOD
    Publication number: 20240030732
    Abstract: A charging controller includes an internal resistance measurement unit configured to measure an internal resistance of a rechargeable battery multiple times over a charging period of the rechargeable battery; a detection unit configured to detect a peak of the internal resistance based on a change in the internal resistance measured by the internal resistance measurement unit; and an update unit configured to update a full charge capacity of the rechargeable battery referring to the peak of the internal resistance detected by the detection unit.
    Type: Application
    Filed: October 2, 2023
    Publication date: January 25, 2024
    Applicant: Lenovo (Singapore) Pte. Ltd.
    Inventors: Hiromitsu Yamaguchi, Tadashi Kosuga, Hideki Otsuki, Koichi Fukuoka
  • Charing controller, rechargeable battery, electronic device, and control method
    Patent number: 11817732
    Abstract: A charging controller includes a current measurement unit configured to measure a charging current of a rechargeable battery, a detection unit configured to detect switching from a constant current charge to a constant voltage charge based on the charging current measured by the current measurement unit, during charge of the rechargeable battery, and an update unit configured to update a full charge capacity of the rechargeable battery based on a charged capacity after the point in time, detected by the detection unit, of switching from the constant current charge to the constant voltage charge.
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: November 14, 2023
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Hiromitsu Yamaguchi, Tadashi Kosuga, Hideki Otsuki, Koichi Fukuoka
  • CHARGING CONTROLLER, RECHARGEABLE BATTERY, ELECTRONIC DEVICE, AND CONTROL METHOD
    Publication number: 20210399567
    Abstract: A charging controller includes a current measurement unit configured to measure a charging current of a rechargeable battery, a detection unit configured to detect switching from a constant current charge to a constant voltage charge based on the charging current measured by the current measurement unit, during charge of the rechargeable battery, and an update unit configured to update a full charge capacity of the rechargeable battery based on a charged capacity after the point in time, detected by the detection unit, of switching from the constant current charge to the constant voltage charge.
    Type: Application
    Filed: May 24, 2021
    Publication date: December 23, 2021
    Applicant: Lenovo (Singapore) Pte. Ltd.
    Inventors: Hiromitsu Yamaguchi, Tadashi Kosuga, Hideki Otsuki, Koichi Fukuoka