Patents by Inventor Shoya MORISHIMA

Shoya MORISHIMA 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 for estimating state of charge, liquid reduction amount of electrolyte solution of valve regulated lead-acid battery, and device for monitoring valve regulated lead-acid
    Patent number: 11604225
    Abstract: A method for estimating a state of charge of a valve regulated lead-acid battery includes; an overcharge amount identification step of identifying an overcharge amount when the lead-acid battery is overcharged after an arbitrary reference time; an open circuit voltage acquisition step of acquiring an open circuit voltage of the lead-acid battery after the reference time; and a state-of-charge estimation step of estimating a state of charge of the lead-acid battery based on the acquired open circuit voltage and a correlation between an open circuit voltage and state of charge in which a rate of change of the state of charge with respect to the open circuit voltage is smaller as the overcharge amount from the reference time until an acquisition time of the open circuit voltage is larger.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: March 14, 2023
    Assignee: GS Yuasa International Ltd.
    Inventors: Shoya Morishima, Yuki Nakanishi
  • METHOD FOR ESTIMATING STATE OF CHARGE, LIQUID REDUCTION AMOUNT OF ELECTROLYTE SOLUTION OF VALVE REGULATED LEAD-ACID BATTERY, AND DEVICE FOR MONITORING VALVE REGULATED LEAD-ACID BATTERY
    Publication number: 20210190869
    Abstract: A method for estimating a state of charge of a valve regulated lead-acid battery includes; an overcharge amount identification step of identifying an overcharge amount when the lead-acid battery is overcharged after an arbitrary reference time; an open circuit voltage acquisition step of acquiring an open circuit voltage of the lead-acid battery after the reference time; and a state-of-charge estimation step of estimating a state of charge of the lead-acid battery based on the acquired open circuit voltage and a correlation between an open circuit voltage and state of charge in which a rate of change of the state of charge with respect to the open circuit voltage is smaller as the overcharge amount from the reference time until an acquisition time of the open circuit voltage is larger.
    Type: Application
    Filed: December 22, 2020
    Publication date: June 24, 2021
    Inventors: Shoya MORISHIMA, Yuki NAKANISHI