Patents by Inventor Keisuke Morii

Keisuke Morii 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 and device for determining state of battery, and battery power supply system therewith
    Patent number: 7593823
    Abstract: Coefficients A and B are calculated from the measured temperature and the measured state of charge. Next, a response voltage Vc is calculated by substituting the measured internal impedance X into a response-voltage correlation equation. Besides, by comparing the response voltage Vc with a predetermined threshold V0, if Vc is bigger than or equal to V0, the battery is determined as normal. By substituting the measured values of internal impedance, temperature, and SOC into the internal impedance calculation formula, a final internal impedance calculation formula is determined by calculating the value of C by an iterating operation. Next, in the case of determining SOH of a battery, by substituting a standard temperature and a standard SOC into the final internal impedance calculation formula, the internal impedance to determine the SOH is calculated. By comparing the internal impedance with SOH determination threshold, the SOH of the battery is determined.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: September 22, 2009
    Assignee: The Furukawa Electric Co., Ltd
    Inventors: Noriyasu Iwane, Keiko Chikazawa, Keisuke Morii
  • METHOD AND DEVICE FOR DETERMINING STATE OF BATTERY, AND BATTERY POWER SUPPLY SYSTEM THEREWITH
    Publication number: 20080120050
    Abstract: Coefficients A and B are calculated from the measured temperature and the measured state of charge. Next, a response voltage Vc is calculated by substituting the measured internal impedance X into a response-voltage correlation equation. Besides, by comparing the response voltage Vc with a predetermined threshold V0, if Vc is bigger than or equal to V0, the battery is determined as normal. By substituting the measured values of internal impedance, temperature, and SOC into the internal impedance calculation formula, a final internal impedance calculation formula is determined by calculating the value of C by an iterating operation. Next, in the case of determining SOH of a battery, by substituting a standard temperature and a standard SOC into the final internal impedance calculation formula, the internal impedance to determine the SOH is calculated. By comparing the internal impedance with SOH determination threshold, the SOH of the battery is determined.
    Type: Application
    Filed: November 5, 2007
    Publication date: May 22, 2008
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Noriyasu IWANE, Keiko CHIKAZAWA, Keisuke MORII