Patents by Inventor Daichi AKIYAMA

Daichi AKIYAMA 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).

  • Publication number: 20240067043
    Abstract: A battery management device to be mounted on an electric vehicle including a driving wheel, a traveling motor configured to generate a driving force for the driving wheel, and a battery configured to store electric power to be consumed by the traveling motor. The battery management device includes a detector configured to detect a state of the battery, and a controller configured to calculate a characteristic value indicating performance of the battery based on an output of the detector, and manage charging and discharging of the battery based on the characteristic value. The controller is configured to, when the characteristic value has deterioration, determine whether the deterioration of the characteristic value is reversible deterioration based on the output of the detector. The controller is configured to, upon determining that the deterioration of the characteristic value is the reversible deterioration, return the characteristic value to a value before the deterioration.
    Type: Application
    Filed: August 16, 2023
    Publication date: February 29, 2024
    Inventors: Toshiyuki ICHIKI, Hiroshi ABE, Hiroshi KUSANO, Daichi AKIYAMA
  • Patent number: 11799141
    Abstract: A charging control apparatus includes a battery, an electric charge mover, and a processor. The battery includes multiple cells. The electric charge mover is configured to move electric charge between the multiple cells. The processor is configured to, upon charging the battery, cause the electric charge mover to move the electric charge of one or more cells serving as a part of the multiple cells to another one or more cells of the multiple cells, and perform a partial charging that charges the one or more cells serving as the part of the multiple cells after causing the electric charge mover to move the electric charge.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: October 24, 2023
    Assignee: SUBARU CORPORATION
    Inventors: Yoshitaka Arai, Mami Osawa, Jun Kikuchi, Daichi Akiyama
  • Publication number: 20230249580
    Abstract: A battery control apparatus for an electric vehicle includes a processor. The processor controls a charging and discharging device of the electric vehicle that includes a battery storing electric power for traveling, a power transmitter performing electric power transmission between the power transmitter and charging equipment provided outside the electric vehicle, and the charging and discharging device charging and discharging the battery via the power transmitter. The processor causes the battery to discharge to the charging equipment via the power transmitter until a voltage of the battery reaches a discharge end voltage corresponding to a state of charge (SOC) of 0%, and thereafter causes the battery to be charged until the voltage of the battery reaches a charge end voltage corresponding to the SOC of 100%. The processor creates a characteristic map representing a relation between the SOC of the battery and the voltage of the battery.
    Type: Application
    Filed: January 5, 2023
    Publication date: August 10, 2023
    Inventors: Mami OSAWA, Kazunori KURODA, Kenta WAKABAYASHI, Daichi AKIYAMA, Tatsuya ISHIBASHI
  • Publication number: 20220324431
    Abstract: A vehicle control apparatus includes a control system. The control system includes a processor and a memory that are communicably coupled to each other, and executes a polarization eliminating mode in which polarization is eliminated by controlling an energization state of an electric power storage device while a vehicle is traveling. The control system sets a first necessary time to eliminate the polarization based on a polarization state of the electric power storage device, acquires a second necessary time to an arrival of the vehicle at a destination, permits the polarization eliminating mode to be executed while the vehicle is traveling in a case where the first necessary time is shorter than or equal to the second necessary time, and refrains from permitting the polarization eliminating mode to be executed while the vehicle is traveling in a case where the first necessary time is longer than the second necessary time.
    Type: Application
    Filed: March 29, 2022
    Publication date: October 13, 2022
    Inventors: Jun KIKUCHI, Mami OSAWA, Daichi AKIYAMA
  • Publication number: 20220171101
    Abstract: A prism lens includes a prism lens body and at least one cylindrical lens. The prism lens body has a set of facing planes a mutual distance of which decreases or increases from one end to another end. The cylindrical lens is integral to at least one plane of the set of planes. The cylindrical lens is formed such that a cross section shape thereof at a plane perpendicular to a direction of a slope of a plane of the prism lens body having the cylindrical lens thereon with respect to the other plane of the set of planes has a certain curved shape to be convex against the plane having the cylindrical lens thereon.
    Type: Application
    Filed: October 17, 2019
    Publication date: June 2, 2022
    Inventors: Toshihiko BABA, Hiroshi ABE, Daichi AKIYAMA
  • Publication number: 20220089050
    Abstract: A charging control apparatus includes a battery, an electric charge mover, and a processor. The battery includes multiple cells. The electric charge mover is configured to move electric charge between the multiple cells. The processor is configured to, upon charging the battery, cause the electric charge mover to move the electric charge of one or more cells serving as a part of the multiple cells to another one or more cells of the multiple cells, and perform a partial charging that charges the one or more cells serving as the part of the multiple cells after causing the electric charge mover to move the electric charge.
    Type: Application
    Filed: September 15, 2021
    Publication date: March 24, 2022
    Applicant: SUBARU CORPORATION
    Inventors: Yoshitaka ARAI, Mami OSAWA, Jun KIKUCHI, Daichi AKIYAMA