Patents by Inventor Rei Aoyama

Rei Aoyama 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).

  • Deterioration state computation method and deterioration state computation device
    Patent number: 11214168
    Abstract: A deterioration-state calculation method for a battery comprises: detecting current and voltage of the battery; calculating a charge state based on the detected value; calculating a first deterioration state of the battery for each predetermined period based on an elapsed time from the time use is started and an amount of charge-discharge; calculating a second deterioration state based on a change amount in the charge state of the battery and a change amount of current; calculating the second deterioration state for a plurality of times within the predetermined period; calculating reliability of calculation of the second deterioration state for each of a plurality of the second deterioration states based on the detected value; calculating a correction value of the deterioration state based on the second deterioration state with the reliability of the predetermined reliability or higher; and calculating the deterioration state by correcting the first deterioration state.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: January 4, 2022
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Rei Aoyama
  • Deterioration State Computation Method and Deterioration State Computation Device
    Publication number: 20200247268
    Abstract: A deterioration-state calculation method for a battery comprises: detecting current and voltage of the battery; calculating a charge state based on the detected value; calculating a first deterioration state of the battery for each predetermined period based on an elapsed time from the time use is started and an amount of charge-discharge; calculating a second deterioration state based on a change amount in the charge state of the battery and a change amount of current; calculating the second deterioration state for a plurality of times within the predetermined period; calculating reliability of calculation of the second deterioration state for each of a plurality of the second deterioration states based on the detected value; calculating a correction value of the deterioration state based on the second deterioration state with the reliability of the predetermined reliability or higher; and calculating the deterioration state by correcting the first deterioration state.
    Type: Application
    Filed: July 31, 2017
    Publication date: August 6, 2020
    Inventor: Rei Aoyama