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).
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Publication number: 20190273251Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode plate having a positive electrode active material layer formed on a positive electrode core, a negative electrode plate having a negative electrode active material layer formed on a negative electrode core, and a flat-shape wound electrode body in which the positive electrode plate and the negative electrode plate are wound through a separator. Further, a protective layer is formed on the positive electrode active material layer or the negative electrode active material layer. The protective layer contains ceramic particles and a binder, and the average particle diameter (D50) and the average particle diameter (D90) of the ceramic particles are 1.0 ?m to 1.8 ?m and 3.0 ?m to 5.0 ?, respectively.Type: ApplicationFiled: January 23, 2019Publication date: September 5, 2019Applicant: SANYO Electric Co., Ltd.Inventors: Tetsuya Matsuda, Haruya Nakai
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Publication number: 20170125791Abstract: Disclosed is a method for manufacturing a positive electrode including a positive electrode substrate made of aluminum foil and a positive electrode active material layer containing a positive electrode active material on the positive electrode substrate. This method includes the steps of forming the positive electrode active material layer on the positive electrode substrate; forming a protective layer on the positive electrode substrate; stretching an exposed region of the positive electrode substrate after the steps of forming the active material layer and the protective layer; and compressing the positive electrode active material layer after the stretching step.Type: ApplicationFiled: October 28, 2016Publication date: May 4, 2017Applicant: SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Ryosuke Shirota, Kazuya Nishio, Haruya Nakai
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Publication number: 20170125790Abstract: Disclosed is a method for manufacturing a positive electrode including a positive electrode substrate made of aluminum foil and a positive electrode active material layer containing a positive electrode active material on the positive electrode substrate. This method includes the steps of stretching a first exposed region of the positive electrode substrate with a first stretching roller disposed upstream; stretching a second exposed region of the positive electrode substrate with a second stretching roller disposed downstream; and compressing the positive electrode active material layer with a pair of compression rollers.Type: ApplicationFiled: October 28, 2016Publication date: May 4, 2017Applicant: SANYO Electric Co., Ltd.Inventors: Masao Fukunaga, Ryosuke Shirota, Kazuya Nishio, Haruya Nakai
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Patent number: 9257717Abstract: In a wound electrode group, a positive electrode includes positive electrode active material layers formed on both surfaces of a band-like positive electrode current collector, and a negative electrode includes negative electrode active material layers on both surfaces of a band-like negative electrode current collector. Charge capacity of the negative electrode falls within a range of 83-99% of theoretical capacity of the negative electrode in a full charge state of a nonaqueous electrolyte secondary battery. An active material mass M1 per unit area of a negative electrode active material layer formed on an outer circumference of the negative electrode current collector, and an active material mass M2 per unit area of a negative electrode active material layer formed on an inner circumference satisfy a relational expression of M1/M2<(R1+t/2)/(R1?t/2), where the electrode group has an innermost diameter of R1, and the negative electrode has a thickness of t.Type: GrantFiled: April 3, 2012Date of Patent: February 9, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshiyuki Muraoka, Masaya Ugaji, Takahiro Aoyama, Haruya Nakai
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Publication number: 20140141305Abstract: In a wound electrode group, a positive electrode 10 includes positive electrode active material layers formed on both surfaces of a band-like positive electrode current collector, and a negative electrode includes negative electrode active material layers on both surfaces of a band-like negative electrode current collector. Charge capacity of the negative electrode falls within a range of 83-99% of theoretical capacity of the negative electrode in a full charge state of a nonaqueous electrolyte secondary battery. An active material mass M1 per unit area of a negative electrode active material layer formed on an outer circumference of the negative electrode current collector, and an active material mass M2 per unit area of a negative electrode active material layer formed on an inner circumference satisfy a relational expression of M1/M2<(R1+t/2)/(R1?t/2), where the electrode group has an innermost diameter of R1, and the negative electrode has a thickness of t.Type: ApplicationFiled: April 3, 2012Publication date: May 22, 2014Applicant: PANASONIC CORPORATIONInventors: Yoshiyuki Muraoka, Masaya Ugaji, Takahiro Aoyama, Haruya Nakai
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Patent number: 8610408Abstract: A lithium ion secondary battery which includes: a power generation element including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte; a case accommodating the power generation element and having an opening; and a sealing plate sealing the opening of the case is charged. The sealing plate has an external terminal of the positive or negative electrode, and an internal terminal electrically connected to the positive or negative electrode. The external and internal terminals are connected to each other and have an electrical resistance therebetween of 0.1 to 2 m?. Two or more constant-current charging steps in each of which the secondary battery is charged at a constant charge current until a charge voltage reaches an end-of-charge voltage are performed.Type: GrantFiled: November 26, 2010Date of Patent: December 17, 2013Assignee: Panasonic CorporationInventors: Haruya Nakai, Ryouichi Tanaka, Akira Nagasaki
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Patent number: 8102155Abstract: A discharge controller includes a 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: GrantFiled: September 21, 2007Date of Patent: January 24, 2012Assignee: Panasonic CorporationInventors: Yoshiyuki Muraoka, Haruya Nakai
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Publication number: 20110316487Abstract: A lithium ion secondary battery which includes: a power generation element including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte; a case accommodating the power generation element and having an opening; and a sealing plate sealing the opening of the case is charged. The sealing plate has an external terminal of the positive or negative electrode, and an internal terminal electrically connected to the positive or negative electrode. The external and internal terminals are connected to each other and have an electrical resistance therebetween of 0.1 to 2 m?. Two or more constant-current charging steps in each of which the secondary battery is charged at a constant charge current until a charge voltage reaches an end-of-charge voltage are performed.Type: ApplicationFiled: November 26, 2010Publication date: December 29, 2011Inventors: Haruya Nakai, Ryouichi Tanaka, Akira Nagasaki
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Patent number: 7909068Abstract: 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: GrantFiled: June 10, 2009Date of Patent: March 22, 2011Assignee: Panasonic CorporationInventors: Haruya Nakai, Takashi Ohkawa, Hiroyuki Kannari, Hiroyuki Usui, Tomitake Omori, Hideki Kasahara, Gota Asano, Yoshiyuki Muraoka, Nobuyuki Kawaguchi, Takashi Ebihara
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Patent number: 7887953Abstract: 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: GrantFiled: December 11, 2009Date of Patent: February 15, 2011Assignees: Panasonic Corporation, Asahi Glass Company, LimitedInventors: Haruya Nakai, Toru Inagaki, Yusuke Ozaki, Masayuki Saito
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Patent number: 7846574Abstract: 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: GrantFiled: August 25, 2005Date of Patent: December 7, 2010Assignee: Panosonic CorporationInventors: Haruya Nakai, Takashi Ohkawa, Hiroyuki Kannari, Hiroyuki Usui, Tomitake Omori, Hideki Kasahara, Gota Asano, Yoshiyuki Muraoka, Nobuyuki Kawaguchi, Takashi Ebihara
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Publication number: 20100092862Abstract: 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: ApplicationFiled: December 11, 2009Publication date: April 15, 2010Applicants: PANASONIC CORPORATION, ASAHI GLASS COMPANY, LIMITEDInventors: Haruya NAKAI, Toru INAGAKI, Yusuke OZAKI, Masayuki SAITO
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Publication number: 20100045236Abstract: 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: ApplicationFiled: September 21, 2007Publication date: February 25, 2010Inventors: Yoshiyuki Muraoka, Haruya Nakai
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Patent number: 7655355Abstract: 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: GrantFiled: June 20, 2002Date of Patent: February 2, 2010Assignees: Panasonic Corporation, Asahi Glass Company, LimitedInventors: Haruya Nakai, Toru Inagaki, Yusuke Ozaki, Masayuki Saito
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Publication number: 20090242072Abstract: 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: ApplicationFiled: June 10, 2009Publication date: October 1, 2009Applicant: PANASONIC CORPORATIONInventors: Haruya Nakai, Takashi Ohkawa, Hiroyuki Kannari, Hiroyuki Usui, Tomitake Omori, Hideki Kasahara, Gota Asano, Yoshiyuki Muraoka, Nobuyuki Kawaguchi, Takashi Ebihara
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Patent number: 7595135Abstract: 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: GrantFiled: March 9, 2004Date of Patent: September 29, 2009Assignee: Panasonic CorporationInventors: Yoshiyuki Muraoka, Haruya Nakai, Masaharu Miyahisa
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Publication number: 20090167253Abstract: 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: ApplicationFiled: May 24, 2007Publication date: July 2, 2009Inventors: Yoshiyuki Muraoka, Haruya Nakai, Yukihiro Okada
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Patent number: 7435511Abstract: 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: GrantFiled: April 23, 2003Date of Patent: October 14, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoichiro Tsuji, Haruya Nakai, Yoshiyuki Muraoka
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Publication number: 20070210279Abstract: 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: ApplicationFiled: March 15, 2006Publication date: September 13, 2007Inventors: Tohru Kawakatsu, Haruya Nakai, Takashi Ebihara, Kohji Yuasa
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Publication number: 20060046147Abstract: 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: ApplicationFiled: August 25, 2005Publication date: March 2, 2006Inventors: Haruya Nakai, Takashi Ohkawa, Hiroyuki Kannari, Hiroyuki Usui, Tomitake Omori, Hideki Kasahara, Gota Asano, Yoshiyuki Muraoka, Nobuyuki Kawaguchi, Takashi Ebihara