Patents by Inventor Shinsaku Ehara

Shinsaku Ehara 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).

  • Secondary battery control device
    Patent number: 9496742
    Abstract: A control device of a secondary battery has a current detection unit (103) that detects a charge current to the secondary battery (101) and a discharge current from the secondary battery (101); a calculation unit (107) that calculates, from the charge current and the discharge current, a charge-discharge efficiency and a discharge-charge efficiency when performing a charge operation and a discharge operation; a deterioration judgment unit (107) that judges a deterioration state of the secondary battery (101) from a temporal change rate of the charge-discharge efficiency and a temporal change rate of the discharge-charge efficiency; and a control unit (107) that sets a charge termination voltage of the secondary battery (101) in accordance with the deterioration state.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: November 15, 2016
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Sohei Suga, Tamaki Miura, Yosuke Suzuki, Shinsaku Ehara, Yoshiaki Nitta, Masanori Aoyagi, Takayuki Matsuoka