Patents by Inventor Shigeo Aoyama

Shigeo Aoyama 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: 11050095
    Abstract: An electrochemical device having excellent safety at high temperature is provided by using a separator for an electrochemical device, which is made of a porous film comprising: a porous base (5) having a heat-resistant temperature of 150° C. or higher and including filler particles (3); at least one kind of shutdown resin (6) selected from the group consisting of resin A that has a melting point in a range of 80° C. to 130° C. and resin B that absorbs an electrolyte and swells due to heating, and the swelling degree is increased as the temperature rises; and a binder (4).
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: June 29, 2021
    Assignee: Maxell Holdings, Ltd.
    Inventors: Hideaki Katayama, Toshihiro Abe, Nobuaki Matsumoto, Fusaji Kita, Shigeo Aoyama
  • Patent number: 9166250
    Abstract: The separator for a battery according to the present invention is a separator for a battery including an insulator layer containing a fibrous material having a heat resistant temperature of equal to or higher than 150° C., insulating inorganic fine particles and a binder, or a separator for a battery including a porous layer formed of a thermal melting resin and an insulator layer containing insulating inorganic fine particles and a binder, wherein water content per unit volume is equal to or smaller than 1 mg/cm3 when the separator is held for 24 hours in an atmosphere with a relative humidity of 60% at 20° C. The use of the separator for a battery according to the present invention makes it possible to provide a lithium secondary battery that has favorable reliability and safety and is excellent in storage characteristics and charge-discharge cycle characteristics.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: October 20, 2015
    Assignee: HITACHI MAXELL, LTD.
    Inventors: Hideaki Katayama, Eri Kojima, Shigeo Aoyama, Yoshinori Sato
  • Patent number: 8801960
    Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: August 12, 2014
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Atsushi Ueda, Kazutaka Uchitomi, Shigeo Aoyama
  • Publication number: 20130047654
    Abstract: According to a heat pump hot water apparatus of the invention, the hot water tank 7 is disposed on one side of the casing 50, the antifreeze liquid circulating means 41 and the heat pump circuit are disposed on the other side of the casing 50, and the water/refrigerant heat exchanger 2 is disposed at a location higher than the compressor 1. According to this configuration, the heat pump circuit and the hot water tank circuit are accommodated in one casing 50, stability and noise-reduction effect can be realized when the heat pump hot water apparatus is installed, and the casing 50 can be made smaller in size by enhancing layout balance of functional parts in the casing 50.
    Type: Application
    Filed: August 14, 2012
    Publication date: February 28, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Toshikatsu Fukunaga, Shigeo Aoyama, Yasuhiko Isayama
  • Publication number: 20120304677
    Abstract: The heat pump hydronic heater of the invention includes a heat pump circuit and a hot water tank circuit, the heat pump circuit and the hot water tank circuit are accommodated in one casing 50, and a hermetic expansion tank 37 is connected to a hot water tank 7 and the heat pump hydronic heater can absorb expansion of water in a circulation path when hot water in a hot water tank 7 is circulated through heat a floor or supply hot water.
    Type: Application
    Filed: December 29, 2011
    Publication date: December 6, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Toshikatsu Fukunaga, Shigeo Aoyama, Yasuhiko Isayama
  • Publication number: 20110003209
    Abstract: The separator for a battery according to the present invention is a separator for a battery including an insulator layer containing a fibrous material having a heat resistant temperature of equal to or higher than 150° C., insulating inorganic fine particles and a binder, or a separator for a battery including a porous layer formed of a thermal melting resin and an insulator layer containing insulating inorganic fine particles and a binder, wherein water content per unit volume is equal to or smaller than 1 mg/cm3 when the separator is held for 24 hours in an atmosphere with a relative humidity of 60% at 20° C. The use of the separator for a battery according to the present invention makes it possible to provide a lithium secondary battery that has favorable reliability and safety and is excellent in storage characteristics and charge-discharge cycle characteristics.
    Type: Application
    Filed: September 7, 2007
    Publication date: January 6, 2011
    Inventors: Hideaki Katayama, Eri Kojima, Shigeo Aoyama, Yoshinori Sato
  • Patent number: 7507502
    Abstract: A negative electrode of the present invention has an active material layer composed of an intermetallic compound on a collector. The intermetallic compound is capable of occluding/desorbing lithium and contains at least one kind of element A selected from Sn, In, Ge, Ga, Pb, Al, Sb, and Si, and an element X that does not substantially react with Li. In the negative electrode, a ratio Ib/Ia of highest peak intensities Ia and Ib of X-ray diffraction peaks derived from the intermetallic compound and the element A is 0.1 or less. By configuring a non-aqueous secondary battery using the above-mentioned negative electrode, the charging/discharging efficiency and cycle characteristics of a thin film electrode used for the negative electrode of the non-aqueous secondary battery are enhanced.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: March 24, 2009
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Eri Kojima, Hiromu Sugiyama, Atsushi Ueda, Shigeo Aoyama
  • Patent number: 7455935
    Abstract: An ion-conductive electrolyte which comprises a compound having in the molecule a structure represented by the following chemical formula and an electrolyte salt; and a cell employing the ion-conductive electrolyte. The ion-conductive electrolyte has a low vapor pressure, has a high ion conductivity even at room temperature, and has a high lithium ion transport number. With this ion-conductive electrolyte, a highly safe cell having excellent discharge characteristics can be provided.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: November 25, 2008
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Toshihiro Abe, Shoji Saibara, Hideaki Katayama, Shigeo Aoyama, Keigo Aoi, Makito Yokoe, Masahiko Okada
  • Patent number: 7432016
    Abstract: An alloy material containing an intermetallic compound of metal that is alloyed with Li and metal that is not alloyed with Li, capable of repeatedly absorbing and desorbing Li, is formed on a collector made of a material that is not alloyed with Li, as a plurality of convex portions partitioned with gaps disposed thereamong, and an area the convex portions occupy on the collector is assumed to be 60 to 95% of the area of the collector. Because of this, an electrode containing an intermetallic compound capable of repeatedly absorbing and desorbing Li can be provided, which can configure a non-aqueous secondary battery having a higher charging/discharging efficiency, a larger discharging capacity, and more excellent high rate characteristics and cycle characteristics.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: October 7, 2008
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Hiromu Sugiyama, Kiyomi Ishizawa, Atsushi Ueda, Shigeo Aoyama
  • Patent number: 7407727
    Abstract: An electrode according to the invention can provide a non-aqueous electrolyte secondary battery having an ability to release a volume expansion at the time of charge and discharge as well as the time of a cycle. The electrode comprises a current collector made of a material which is not alloyed with Li, and a dot pattern 2 of a metallic material able to be alloyed with Li formed on the current collector. At the time of charge, since the volume expansion of each dot 3 is carried out so as to bury adjoining crevices 4 between the dots, a stress generated is released, thereby degradation of an electrode being avoided. Each dot may also be made into porosity.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: August 5, 2008
    Assignee: Hitachi Maxell Ltd.
    Inventors: Hiromu Sugiyama, Hideyuki Morimoto, Atsushi Ueda, Shigeo Aoyama
  • Publication number: 20080121841
    Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.
    Type: Application
    Filed: January 31, 2008
    Publication date: May 29, 2008
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Atsushi Ueda, Kazutaka Uchitomi, Shigeo Aoyama
  • Patent number: 7351500
    Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2?y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: April 1, 2008
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Atsushi Ueda, Kazutaka Uchitomi, Shigeo Aoyama
  • Patent number: 7341805
    Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: March 11, 2008
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Atsushi Ueda, Kazutaka Uchitomi, Shigeo Aoyama
  • Patent number: 7316862
    Abstract: A lithium-containing complex oxide represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.15, ?0.05?x+??0.2, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Mg, Ti, Cr, Fe, Co, Cu, Zn, Al, Ge, Zr and Sn) is provided. The lithium-containing complex oxide contains secondary particles formed of flocculated primary particles. The primary particles have a mean particle diameter of 0.3 to 3 ?m, and the secondary particles have a mean particle diameter of 5 to 20 ?m. By using this lithium-containing complex oxide as a positive active material, a non-aqueous secondary battery having a high capacity, excellent cycle durability and excellent storage characteristics at a high temperature is achieved.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: January 8, 2008
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Kazutaka Uchitomi, Atsushi Ueda, Shigeo Aoyama
  • Publication number: 20070264577
    Abstract: An electrochemical device having excellent safety at high temperature is provided by using a separator for an electrochemical device, which is made of a porous film comprising: a porous base (5) having a heat-resistant temperature of 150° C. or higher and including filler particles (3); at least one kind of shutdown resin (6) selected from the group consisting of resin A that has a melting point in a range of 80° C. to 130° C. and resin B that absorbs an electrolyte and swells due to heating, and the swelling degree is increased as the temperature rises; and a binder (4).
    Type: Application
    Filed: December 8, 2005
    Publication date: November 15, 2007
    Inventors: Hideaki Katayama, Toshihiro Abe, Nobuaki Matsumoto, Fusaji Kita, Shigeo Aoyama
  • Patent number: 6989218
    Abstract: A material capable of occluding/discharging a lithium ion or a lithium-ion-conducting material is made to adhere to a surface of a particle of a lithium transition metal composite nitride having a particle diameter of 0.01 to 30 ?m by a vapor phase method represented by a thin-film forming method selected from chemical vapor deposition, vapor deposition, ion plating and sputtering, thereby providing a composite electrode material with improved stability in the air as an electrode material capable of constituting an electrochemical element having a large capacity and improved cycle characteristics.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: January 24, 2006
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Masayuki Yamada, Miwa Miyamoto, Eri Yokoyama, Toshihiro Koyama, Shoji Saibara, Shigeo Aoyama
  • Publication number: 20050260496
    Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.
    Type: Application
    Filed: July 28, 2005
    Publication date: November 24, 2005
    Applicant: Hitachi Maxell, Ltd.
    Inventors: Atsushi Ueda, Kazutaka Uchitomi, Shigeo Aoyama
  • Publication number: 20050074671
    Abstract: An electrode according to the invention can provide a non-aqueous electrolyte secondary battery having an ability to release a volume expansion at the time of charge and discharge as well as the time of a cycle. The electrode comprises a current collector made of a material which is not alloyed with Li, and a dot pattern 2 of a metallic material able to be alloyed with Li formed on the current collector. At the time of charge, since the volume expansion of each dot 3 is carried out so as to bury adjoining crevices 4 between the dots, a stress generated is released, thereby degradation of an electrode being avoided. Each dot may also be made into porosity.
    Type: Application
    Filed: September 29, 2003
    Publication date: April 7, 2005
    Inventors: Hiromu Sugiyama, Hideyuki Morimoto, Atsushi Ueda, Shigeo Aoyama
  • Patent number: D650777
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: December 20, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hiroshi Suzuki, Eisuke Noda, Shigeo Aoyama
  • Patent number: D650778
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: December 20, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hiroshi Suzuki, Eisuke Noda, Shigeo Aoyama