Patents by Inventor Takaharu OHKANDA

Takaharu OHKANDA 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).

  • Lead acid battery device, control device for lead acid battery, and control method for lead acid battery
    Patent number: 10976373
    Abstract: A lead acid battery device includes a lead acid battery, a charge control unit to charge the lead acid battery by alternately and repeatedly performing high voltage charging, in which a pulsed high voltage is applied to the lead acid battery, and low voltage charging, in which a low voltage lower than the high voltage is applied to the lead acid battery, and an internal resistance calculation unit to calculate an internal resistance of the lead acid battery based on the voltage difference and the current difference of the lead acid battery between a condition at which the pulsed high voltage is applied and a condition at which the pulsed high voltage is not applied.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: April 13, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Takaharu Ohkanda, Kazuyuki Yoda, Hiroshi Takano
  • Charge apparatus to repeatedly apply a pulsed high voltage and a low voltage to charge a battery
    Patent number: 10756557
    Abstract: With a conventional pulse charging method, a low voltage value for the pulse voltage is set to zero volts. When the low voltage value is low in this manner during charging, there is a problem that the negative pole of a secondary battery deteriorates. Provided is a secondary battery apparatus including a secondary battery and charge/discharge control apparatus that controls charging and discharging of the secondary battery. The charge/discharge control apparatus repeatedly performs, in an alternating manner, high voltage charging of applying a pulsed high voltage to the secondary battery and low voltage charging of applying a low voltage that is higher than 0 V and lower than the high voltage to the secondary battery.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: August 25, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Takaharu Ohkanda, Kazuyuki Yoda, Hiroshi Takano, Ryuta Nishizuka
  • LEAD ACID BATTERY DEVICE, CONTROL DEVICE FOR LEAD ACID BATTERY, AND CONTROL METHOD FOR LEAD ACID BATTERY
    Publication number: 20190170830
    Abstract: A lead acid battery device includes a lead acid battery, a charge control unit to charge the lead acid battery by alternately and repeatedly performing high voltage charging, in which a pulsed high voltage is applied to the lead acid battery, and low voltage charging, in which a low voltage lower than the high voltage is applied to the lead acid battery, and an internal resistance calculation unit to calculate an internal resistance of the lead acid battery based on the voltage difference and the current difference of the lead acid battery between a condition at which the pulsed high voltage is applied and a condition at which the pulsed high voltage is not applied.
    Type: Application
    Filed: February 5, 2019
    Publication date: June 6, 2019
    Inventors: Takaharu OHKANDA, Kazuyuki YODA, Hiroshi TAKANO
  • POWER SUPPLY SYSTEM, CHARGE/DISCHARGE CONTROL APPARATUS, AND CHARGE/DISCHARGE CONTROL METHOD
    Publication number: 20170155277
    Abstract: With a conventional pulse charging method, a low voltage value for the pulse voltage is set to zero volts. When the low voltage value is low in this manner during charging, there is a problem that the negative pole of a secondary battery deteriorates. Provided is a secondary battery apparatus including a secondary battery and charge/discharge control apparatus that controls charging and discharging of the secondary battery. The charge/discharge control apparatus repeatedly performs, in an alternating manner, high voltage charging of applying a pulsed high voltage to the secondary battery and low voltage charging of applying a low voltage that is higher than 0 V and lower than the high voltage to the secondary battery.
    Type: Application
    Filed: November 29, 2016
    Publication date: June 1, 2017
    Inventors: Takaharu OHKANDA, Kazuyuki YODA, Hiroshi TAKANO, Ryuta NISHIZUKA