Patents by Inventor Hideya Asano

Hideya Asano 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).

  • Patent number: 7651816
    Abstract: A positive electrode active material powder for a non-aqueous electrolyte secondary battery, wherein an amount of a liquid reagent absorbed by the powder is 20 to 40 ml per 100 g of the powder when the liquid reagent is dibutyl phthalate, and the amount is 20 to 50 ml per 100 g of the powder when the liquid reagent is N-methyl-2-pyrrolidone or water, the absorption amount is a value measured using a device according to test method A or B regarding DBP absorption based on JIS K6217 (1997), and the measured value is an amount of the liquid reagent added until the viscosity of a mixture of the powder and the liquid reagent reaches a level corresponding to 70% of a maximum torque which is recorded when a change in the viscosity of a mixture of the powder and the liquid reagent is measured by a torque detecting device.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: January 26, 2010
    Assignee: Panasonic Corporation
    Inventors: Shozo Fujiwara, Hideya Asano, Hajime Konishi
  • Patent number: 7150940
    Abstract: A lithium ion secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode active material, a conductive agent and a binder, the positive electrode active material comprises a lithium-containing composite oxide represented by the formula Lia(Co1?x?yMgxMy)bOc, where M is at least one selected from Ni and Al, 0?a?1.05, 0.03?x?0.15, 0?y?0.25, 0.85?b?1.1 and 1.8?c?2.1, and the amount of the conductive agent contained in the positive electrode is not more than 3.0 parts by weight per 100 parts by weight of the positive electrode active material.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: December 19, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masaya Okochi, Masatoshi Nagayama, Yutaka Kawatate, Ryoichi Tanaka, Hideya Asano
  • Publication number: 20050221182
    Abstract: A positive electrode active material powder for a non-aqueous electrolyte secondary battery, wherein an amount of a liquid reagent absorbed by the powder is 20 to 40 ml per 100 g of the powder when the liquid reagent is dibutyl phthalate, and the amount is 20 to 50 ml per 100 g of the powder when the liquid reagent is N-methyl-2-pyrrolidone or water, the absorption amount is a value measured using a device according to test method A or B regarding DBP absorption based on JIS K6217 (1997), and the measured value is an amount of the liquid reagent added until the viscosity of a mixture of the powder and the liquid reagent reaches a level corresponding to 70% of a maximum torque which is recorded when a change in the viscosity of a mixture of the powder and the liquid reagent is measured by a torque detecting device.
    Type: Application
    Filed: March 22, 2005
    Publication date: October 6, 2005
    Inventors: Shozo Fujiwara, Hideya Asano, Hajime Konishi
  • Patent number: 6787266
    Abstract: A battery, in which measures are taken to suppress a reduction in charge/discharge capacity and degradation of load characteristics due to peeling of an active material off the current collector during repeated charging and discharging, is disclosed. Boehmite treatment or chromate treatment of the current collector surface of the electrode plate for the battery suppresses the degradation of charge/discharge capacity and load characteristics.
    Type: Grant
    Filed: April 21, 2001
    Date of Patent: September 7, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tatsuya Hashimoto, Hiroyuki Murai, Yorihito Ohana, Hiroshi Matsuno, Hideya Asano
  • Publication number: 20040072073
    Abstract: A lithium ion secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode active material, a conductive agent and a binder, the positive electrode active material comprises a lithium-containing composite oxide represented by the formula Lia(Co1-x-yMgxMy)bOc, where M is at least one selected from Ni and Al, 0≦a≦1.05, 0.03≦x≦0.15, 0≦y≦0.25, 0.85≦b≦1.1 and 1.8≦c≦2.1, and the amount of the conductive agent contained in the positive electrode is not more than 3.0 parts by weight per 100 parts by weight of the positive electrode active material.
    Type: Application
    Filed: August 27, 2003
    Publication date: April 15, 2004
    Inventors: Masaya Okochi, Masatoshi Nagayama, Yutaka Kawatate, Ryoichi Tanaka, Hideya Asano