Patents by Inventor Takashi Achiha

Takashi Achiha 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).

  • Container for heat treatment of positive-electrode active material for lithium-ion battery and method for producing the same
    Patent number: 9733019
    Abstract: A container for heat treatment of a positive-electrode active material for a lithium-ion battery to the present invention is characterized by having a base portion containing 60 to 95 mass % of alumina, and a surface portion containing 20 to 80 mass % of spinel and formed integrally with the base portion. Moreover, a production method of the present invention is characterized by comprising a step of placing an alumina-based powder, a step of placing a spinel-based powder above the alumina-based powder, a step of forming a compact by compressing the powders and a step of firing the compact.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: August 15, 2017
    Assignee: TYK CORPORATION
    Inventors: Yasuta Koike, Takashi Achiha, Takahiro Kamiya
  • Container for heat treatment of positive-electrode active material for lithium-ion battery and method for producing the same
    Publication number: 20140021661
    Abstract: A container for heat treatment of a positive-electrode active material for a lithium-ion battery to the present invention is characterized by having a base portion containing 60 to 95 mass % of alumina, and a surface portion containing 20 to 80 mass % of spinel and formed integrally with the base portion. Moreover, a production method of the present invention is characterized by comprising a step of placing an alumina-based powder, a step of placing a spinel-based powder above the alumina-based powder, a step of forming a compact by compressing the powders and a step of firing the compact.
    Type: Application
    Filed: June 28, 2011
    Publication date: January 23, 2014
    Applicant: TYK CORPORATION
    Inventors: Yasuta Koike, Takashi Achiha, Takahiro Kamiya
  • CONTAINER FOR HEAT TREATMENT OF LITHIUM-CONTAINING COMPOUND
    Publication number: 20140017424
    Abstract: A container for heat treatment of a positive-electrode active material of a lithium ion battery to hold raw material powder of the positive-electrode active material of the lithium ion battery when the raw material powder is subjected to heat treatment is provided. The heat treatment container contains 60 to 95 mass % of alumina and 10 to 20 mass % of silica, is free from MgO, ZrO2 and Li compounds, and has a porosity of 10 to 20%. The heat treatment container suppresses a reaction product from contaminating the raw material powder owing to suppressed reactivity with the raw material powder, and is suppressed from being cracked by thermal shock owing to the porosity in the predetermined range.
    Type: Application
    Filed: June 28, 2011
    Publication date: January 16, 2014
    Applicant: TYK Corporation
    Inventors: Yasuta Koike, Takashi Achiha, Takahiro Kamiya