Patents by Inventor Teruhiko Sakakibara

Teruhiko Sakakibara 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).

  • State-of-charge detector, program, method and charge-discharge control device utilizing rate of change of internal resistance
    Patent number: 6987377
    Abstract: A state-of-charge detector device for detecting the state of charge of a secondary battery is provided. The device has a current detector that detects an electric current through the secondary battery, a voltage detector that detects a voltage between terminals of the secondary battery, and an internal resistance calculator that calculates an internal resistance of the secondary battery based on the detected current and the detected voltage. Furthermore, an internal resistance changing rate calculator is provided which calculates a rate of change in the internal resistance calculated, with respect to an amount of charge stored in the secondary battery. A state-of-charge determinator determines a state of charge of the secondary battery based on the rate of change in the internal resistance calculated.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: January 17, 2006
    Assignees: Nippon Soken, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Teruhiko Sakakibara, Shoji Sakai, Yoshiyuki Nakayama
  • State-of-charge detector device, program thereof, state-of-charge detecting method, and charge-discharge control device
    Publication number: 20040012373
    Abstract: A state-of-charge detector device for detecting the state of charge of a secondary battery is provided. The device has a current detector that detects an electric current through the secondary battery, a voltage detector that detects a voltage between terminals of the secondary battery, and an internal resistance calculator that calculates an internal resistance of the secondary battery based on the detected current and the detected voltage. Furthermore, an internal resistance changing rate calculator is provided which calculates a rate of change in the internal resistance calculated, with respect to an amount of charge stored in the secondary battery. A state-of-charge deterrninator determines a state of charge of the secondary battery based on the rate of change in the internal resistance calculated.
    Type: Application
    Filed: July 8, 2003
    Publication date: January 22, 2004
    Inventors: Teruhiko Sakakibara, Shoji Sakai, Yoshiyuki Nakayama