Patents by Inventor Haruya Nakai

Haruya Nakai 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: 7909068
    Abstract: An alkaline storage battery including a strip-shaped porous metal substrate and a material mixture filled into the substrate. The substrate has an unfilled portion where the material mixture is not filled along at least one of two longitudinal sides of the substrate. The substrate has a weight per unit area of 150 to 350 g/m2. The material mixture contains an active material and an elastic polymer.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: March 22, 2011
    Assignee: Panasonic Corporation
    Inventors: Haruya Nakai, Takashi Ohkawa, Hiroyuki Kannari, Hiroyuki Usui, Tomitake Omori, Hideki Kasahara, Gota Asano, Yoshiyuki Muraoka, Nobuyuki Kawaguchi, Takashi Ebihara
  • Patent number: 7887953
    Abstract: A positive electrode for an alkaline storage battery is disclosed, comprising a conductive base material and an active material layer attached to the base material, the active material layer comprising an active material and a binder, the binder comprising an elastic copolymer comprising one or more tetrafluoroethylene units and one or more propylene units.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: February 15, 2011
    Assignees: Panasonic Corporation, Asahi Glass Company, Limited
    Inventors: Haruya Nakai, Toru Inagaki, Yusuke Ozaki, Masayuki Saito
  • Patent number: 7846574
    Abstract: An alkaline storage battery including a strip-shaped porous metal substrate and a material mixture filled into the substrate. The substrate has an unfilled portion where the material mixture is not filled along at least one of two longitudinal sides of the substrate. The substrate has a weight per unit area of 150 to 350 g/m2. The material mixture contains an active material and an elastic polymer.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: December 7, 2010
    Assignee: Panosonic Corporation
    Inventors: Haruya Nakai, Takashi Ohkawa, Hiroyuki Kannari, Hiroyuki Usui, Tomitake Omori, Hideki Kasahara, Gota Asano, Yoshiyuki Muraoka, Nobuyuki Kawaguchi, Takashi Ebihara
  • Publication number: 20100092862
    Abstract: A positive electrode for an alkaline storage battery is disclosed, comprising a conductive base material and an active material layer attached to the base material, the active material layer comprising an active material and a binder, the binder comprising an elastic copolymer comprising one or more tetrafluoroethylene units and one or more propylene units.
    Type: Application
    Filed: December 11, 2009
    Publication date: April 15, 2010
    Applicants: PANASONIC CORPORATION, ASAHI GLASS COMPANY, LIMITED
    Inventors: Haruya NAKAI, Toru INAGAKI, Yusuke OZAKI, Masayuki SAITO
  • Publication number: 20100045236
    Abstract: A discharge controller includes secondary battery, a switch section for opening/closing a discharge path from the secondary battery to a load, a voltage detector for detecting a terminal voltage of the secondary battery, and a cut-off voltage control section for controlling the switch section to be opened when the terminal voltage as detected by the voltage detector is not more than a predetermined cut-off voltage of discharge VE, while measuring an amount of decrease per unit time of the terminal voltage as detected by the voltage detector to set the cut-off voltage of discharge VE to a lower voltage, for a larger amount of decrease per unit time of the terminal voltage as detected by the voltage detector.
    Type: Application
    Filed: September 21, 2007
    Publication date: February 25, 2010
    Inventors: Yoshiyuki Muraoka, Haruya Nakai
  • Patent number: 7655355
    Abstract: A positive electrode for an alkaline storage battery is disclosed, comprising a conductive base material and an active material layer attached to the base material, the active material layer comprising an active material and a binder, the binder comprising an elastic copolymer comprising one or more tetrafluoroethylene units and one or more propylene units.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: February 2, 2010
    Assignees: Panasonic Corporation, Asahi Glass Company, Limited
    Inventors: Haruya Nakai, Toru Inagaki, Yusuke Ozaki, Masayuki Saito
  • Publication number: 20090242072
    Abstract: An alkaline storage battery including a strip-shaped porous metal substrate and a material mixture filled into the substrate. The substrate has an unfilled portion where the material mixture is not filled along at least one of two longitudinal sides of the substrate. The substrate has a weight per unit area of 150 to 350 g/m2. The material mixture contains an active material and an elastic polymer.
    Type: Application
    Filed: June 10, 2009
    Publication date: October 1, 2009
    Applicant: PANASONIC CORPORATION
    Inventors: Haruya Nakai, Takashi Ohkawa, Hiroyuki Kannari, Hiroyuki Usui, Tomitake Omori, Hideki Kasahara, Gota Asano, Yoshiyuki Muraoka, Nobuyuki Kawaguchi, Takashi Ebihara
  • Patent number: 7595135
    Abstract: An alkaline storage battery comprising: a positive electrode plate; a negative electrode plate; separators interposed between the positive electrode plate and the negative electrode plate; and an alkaline electrolyte, wherein a first edge of the positive electrode plate and a first edge of the negative electrode plate serve as current collecting portions, at least a second edge of at least the positive electrode plate is covered with polyethylene resin on an end face and peripheral sides thereof, the second edge being positioned opposite to the first edge, and the polyethylene resin film formed at the second edge of the positive electrode plate adheres to the separators positioned on both sides of the positive electrode plate.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: September 29, 2009
    Assignee: Panasonic Corporation
    Inventors: Yoshiyuki Muraoka, Haruya Nakai, Masaharu Miyahisa
  • Publication number: 20090167253
    Abstract: A charging circuit includes: a connecting terminal for connection to a nonaqueous-electrolyte secondary battery; a heating portion heating the nonaqueous-electrolyte secondary battery; a charging portion charging the nonaqueous-electrolyte secondary battery connected to the connecting terminal; and a control unit which allows the charging portion to charge the nonaqueous-electrolyte secondary battery after allowing the heating portion to heat the nonaqueous-electrolyte secondary battery, lowers the temperature of the nonaqueous-electrolyte secondary battery, and allows the charging portion to further charge the nonaqueous-electrolyte secondary battery.
    Type: Application
    Filed: May 24, 2007
    Publication date: July 2, 2009
    Inventors: Yoshiyuki Muraoka, Haruya Nakai, Yukihiro Okada
  • Patent number: 7435511
    Abstract: A nickel-metal hydride storage battery having a spirally wound electrode group including: (a) a positive electrode including an active material layer containing nickel hydroxide and a positive electrode core material; (b) a negative electrode including an active material layer containing a hydrogen storage alloy and a negative electrode core material; and (c) a separator interposed between the positive and negative electrodes, wherein the separator includes a hydrophilicity-imparted non-woven fabric including polyolefin or polyamide and has a thickness of 0.04 to 0.09 mm, and the percentage occupied by the cross section “SS” of the separator in the transverse cross section “S” of the electrode group is not greater than 25%.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: October 14, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoichiro Tsuji, Haruya Nakai, Yoshiyuki Muraoka
  • Publication number: 20070210279
    Abstract: A manufacturing method of an electrode paste for alkaline storage batteries includes a first kneading step and a second kneading step. In the first kneading step, a first powder with an average particle size ranging between 0.1 ?m and 5 ?m and polysaccharide are kneaded. In the second kneading step, a first mixture prepared in the first kneading step and a second powder with an average particle size ranging between 8 ?m and 35 ?m are kneaded.
    Type: Application
    Filed: March 15, 2006
    Publication date: September 13, 2007
    Inventors: Tohru Kawakatsu, Haruya Nakai, Takashi Ebihara, Kohji Yuasa
  • Publication number: 20060046147
    Abstract: An alkaline storage battery including a strip-shaped porous metal substrate and a material mixture filled into the substrate. The substrate has an unfilled portion where the material mixture is not filled along at least one of two longitudinal sides of the substrate. The substrate has a weight per unit area of 150 to 350 g/m2. The material mixture contains an active material and an elastic polymer.
    Type: Application
    Filed: August 25, 2005
    Publication date: March 2, 2006
    Inventors: Haruya Nakai, Takashi Ohkawa, Hiroyuki Kannari, Hiroyuki Usui, Tomitake Omori, Hideki Kasahara, Gota Asano, Yoshiyuki Muraoka, Nobuyuki Kawaguchi, Takashi Ebihara
  • Publication number: 20060035153
    Abstract: An alkaline storage battery comprising: a positive electrode plate; a negative electrode plate; separators interposed between the positive electrode plate and the negative electrode plate; and an alkaline electrolyte, wherein a first edge of the positive electrode plate and a first edge of the negative electrode plate serve as current collecting portions, at least a second edge of at least the positive electrode plate is covered with polyethylene resin on an end face and peripheral sides thereof, the second edge being positioned opposite to the first edge, and the polyethylene resin film formed at the second edge of the positive electrode plate adheres to the separators positioned on both sides of the positive electrode plate.
    Type: Application
    Filed: March 9, 2004
    Publication date: February 16, 2006
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiyuki Muraoka, Haruya Nakai, Masaharu Miyahisa
  • Publication number: 20050238960
    Abstract: The present invention provides a non-sintered type positive electrode for alkaline storage battery whose drop out of active material powder is suppressed while maintaining favorable charging-discharging properties such as utilization factor. A non-sintered type positive electrode constituted by an electrically conductive support, a nickel hydroxide powder coated by cobalt oxyhydroxide (COH), an additive made of COH powder, and a binder, in which the average particle size of the nickel hydroxide powder coated by COH is greater than that of the additive made of COH powder.
    Type: Application
    Filed: November 24, 2004
    Publication date: October 27, 2005
    Inventors: Yasushi Nakamura, Haruya Nakai
  • Publication number: 20030203283
    Abstract: A nickel-metal hydride storage battery having a spirally wound electrode group including: (a) a positive electrode including an active material layer containing nickel hydroxide and a positive electrode core material; (b) a negative electrode including an active material layer containing a hydrogen storage alloy and a negative electrode core material; and (c) a separator interposed between the positive and negative electrodes, wherein the separator includes a hydrophilicity-imparted non-woven fabric including polyolefin or polyamide and has a thickness of 0.04 to 0.09 mm, and the percentage occupied by the cross section “SS” of the separator in the transverse cross section “S” of the electrode group is not greater than 25%.
    Type: Application
    Filed: April 23, 2003
    Publication date: October 30, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoichiro Tsuji, Haruya Nakai, Yoshiyuki Muraoka
  • Publication number: 20030017394
    Abstract: A positive electrode for an alkaline storage battery is disclosed, comprising a conductive base material and an active material layer attached to the base material, the active material layer comprising an active material and a binder, the binder comprising an elastic copolymer comprising one or more tetrafluoroethylene units and one or more propylene units.
    Type: Application
    Filed: June 20, 2002
    Publication date: January 23, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd. and Asahi Glass Company, Limited
    Inventors: Haruya Nakai, Toru Inagaki, Yusuke Ozaki, Masayuki Saito