Patents by Inventor Hideki Tsuruga

Hideki Tsuruga 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).

  • Method of propagation test on battery system
    Patent number: 10418669
    Abstract: A method of propagation test on a battery system has: a main irradiation step of irradiating a laser beam in prescribed conditions, on a light-receiving part of the outer member of a light-receiving cell, or on a light-receiving part which is arranged in contact with the outer member of the light-receiving cell, thereby to heat the light-receiving cell; a thermal runaway confirming step of confirming a thermal runaway of the light-receiving cell; an irradiation stopping step of stopping the laser-beam irradiation after the thermal runaway was confirmed in the thermal runaway confirming step; and a system integrity inspection step of inspecting an integrity of the cells other than the light-receiving cell after the irradiation stopping step. The prescribed conditions are conditions in which a melted scar is formed on the light-receiving part.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: September 17, 2019
    Assignee: Japan Electrical Safety & Environment Technology Laboratories
    Inventors: Keizoh Honda, Hideki Tsuruga, Masachika Kodama, Takeshi Senoo, Kenji Nishioka, Hideo Ichimaru
  • METHOD OF PROPAGATION TEST ON BATTERY SYSTEM
    Publication number: 20170059500
    Abstract: A method of propagation test on a battery system has: a main irradiation step of irradiating a laser beam in prescribed conditions, on a light-receiving part of the outer member of a light-receiving cell, or on a light-receiving part which is arranged in contact with the outer member of the light-receiving cell, thereby to heat the light-receiving cell; a thermal runaway confirming step of confirming a thermal runaway of the light-receiving cell; an irradiation stopping step of stopping the laser-beam irradiation after the thermal runaway was confirmed in the thermal runaway confirming step; and a system integrity inspection step of inspecting an integrity of the cells other than the light-receiving cell after the irradiation stopping step. The prescribed conditions are conditions in which a melted scar is formed on the light-receiving part.
    Type: Application
    Filed: August 3, 2016
    Publication date: March 2, 2017
    Applicant: Japan Electrical Safety & Environment Technology Laboratories
    Inventors: Keizoh HONDA, Hideki TSURUGA, Masachika KODAMA, Takeshi SENOO, Kenji NISHIOKA, Hideo ICHIMARU
  • Lithium-ion secondary battery
    Patent number: 8876917
    Abstract: A lithium-ion secondary battery is provided where the production process line that fabricated it can be identified. The lithium-ion secondary battery includes a jelly roll, a positive electrode tab, a negative electrode tab, a positive electrode can, and a lid. The jelly roll is made by rolling the positive electrode and the negative electrode with an interposed separator, and is contained in the casing. The positive electrode tab has one end connected to the positive electrode of the jelly roll and the other end connected to the lid. The negative electrode tab has one end connected to the negative electrode of the jelly roll and the other end connected to a terminal provided on the lid. The other end of the negative electrode tab has a shape with a cut at a cut angle determined in accordance with the production process line that fabricated the lithium-ion secondary battery.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: November 4, 2014
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Yuta Nakagawa, Masato Ueno, Hiroshi Abe, Hideki Tsuruga, Yohei Hamaguchi
  • LITHIUM-ION SECONDARY BATTERY
    Publication number: 20120121968
    Abstract: A lithium-ion secondary battery is provided where the production process line that fabricated it can be identified. The lithium-ion secondary battery includes a jelly roll, a positive electrode tab, a negative electrode tab, a positive electrode can, and a lid. The jelly roll is made by rolling the positive electrode and the negative electrode with an interposed separator, and is contained in the casing. The positive electrode tab has one end connected to the positive electrode of the jelly roll and the other end connected to the lid. The negative electrode tab has one end connected to the negative electrode of the jelly roll and the other end connected to a terminal provided on the lid. The other end of the negative electrode tab has a shape with a cut at a cut angle determined in accordance with the production process line that fabricated the lithium-ion secondary battery.
    Type: Application
    Filed: February 28, 2011
    Publication date: May 17, 2012
    Inventors: Yuta Nakagawa, Masato Ueno, Hiroshi Abe, Hideki Tsuruga, Yohei Hamaguchi