Patents by Inventor Katsuhiro Matsushima

Katsuhiro Matsushima 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).

  • Fuel cell system with connector welding prevention
    Patent number: 9502725
    Abstract: Weld of a relay provided on an electric power supply path can be suppressed. When a fuel cell system starts, a controller sets an output voltage of a Bat converter at an open circuit voltage of a battery and sets an output voltage of a FC converter at an open circuit voltage of a fuel cell. When the output voltage of the FC converter is lower than the output voltage of the Bat converter, the controller controls to boost the output voltage of the FC converter to the output voltage of the Bat converter. On the other hand, when the output voltage of the FC converter is the output voltage of the Bat converter or more, the controller controls to boost the output voltage of the Bat converter to the output voltage of the FC converter. When the output voltage difference between the FC converter and the Bat converter is a predetermined value or less capable of turning the FC relays ON without causing welding of the FC relays, the controller turns the FC relays ON.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: November 22, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoki Kanie, Shohei Okamoto, Katsuhiro Matsushima
  • FUEL CELL SYSTEM
    Publication number: 20120086278
    Abstract: Weld of a relay provided on an electric power supply path can be suppressed. When a fuel cell system starts, a controller sets an output voltage of a Bat converter at an open circuit voltage of a battery and sets an output voltage of a FC converter at an open circuit voltage of a fuel cell. When the output voltage of the FC converter is lower than the output voltage of the Bat converter, the controller controls to boost the output voltage of the FC converter to the output voltage of the Bat converter. On the other hand, when the output voltage of the FC converter is the output voltage of the Bat converter or more, the controller controls to boost the output voltage of the Bat converter to the output voltage of the FC converter. When the output voltage difference between the FC converter and the Bat converter is a predetermined value or less capable of turning the FC relays ON without causing welding of the FC relays, the controller turns the FC relays ON.
    Type: Application
    Filed: June 9, 2009
    Publication date: April 12, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoki Kanie, Shohei Okamoto, Katsuhiro Matsushima