Patents by Inventor Atsutoshi Ako

Atsutoshi Ako 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).

  • Publication number: 20220200107
    Abstract: This positive electrode plate, included in a rolled electrode body, is characterized by comprising a belt-shape positive electrode core, a positive electrode active material layer which, along the long direction of the positive electrode core, is formed in a belt shape on at least part of the surface of the positive electrode core, and a positive electrode tab which extends in the short direction of the positive electrode core from the active material layer-uncoated area of the surface of the positive electrode core where the positive electrode active material layer is not formed, and the root width H1 and the maximum width H2 of the positive electrode tab satisfy the relation 0.4×H2?H1?0.9×H2.
    Type: Application
    Filed: April 24, 2020
    Publication date: June 23, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kentaro Tsukamoto, Atsutoshi Ako, Yoshifumi Magari
  • Publication number: 20220140308
    Abstract: Disclosed is a method for manufacturing a positive electrode plate, wherein even when a positive electrode mix layer is densely compressed, the positive electrode plate is prevented from being so greatly bent that wrinkles created in non-coated regions during transport, winding, or lamination develop into deep winkles or cracks, thus avoiding the inability to transport or wind the positive electrode plate. This manufacturing method can provide a positive electrode plate having a positive electrode mix layer formed on the surface thereof, wherein the filling density of the positive electrode mix layer is at least 3.4 g/cm3, and the warpage amount h of the positive electrode plate in the width direction perpendicular to the longitudinal direction satisfies 0.0?h?3.0 mm per 1 m in the longitudinal direction.
    Type: Application
    Filed: November 29, 2019
    Publication date: May 5, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Akira Nishida, Yoshifumi Magari, Atsutoshi Ako, Daisuke Ikeda
  • Publication number: 20220123296
    Abstract: The nonaqueous electrolyte secondary battery according to one embodiment includes a flat wound electrode body in which a positive plate and a negative plate are wound via a separator and characterized in that the positive plate has a positive core and a positive mixed material layer that is formed on both sides of the positive core, the positive mixed material layer includes a lithium metal composite oxide represented by general formula Li1+xMaO2+b (in the formula, x, a, and b satisfy the conditions x+a=1, ?0.2<x?0.2, and ?0.1?b?0.1, and M includes Ni and Co and at least one element selected from the group consisting of Mn and Al), and the positive plate has a flexibility index of 15 to 19. Such a positive plate is capable of having a high packing density while suppressing cracks in the positive mixed material layer and buckling of the positive plate and the negative plate.
    Type: Application
    Filed: November 27, 2019
    Publication date: April 21, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Atsutoshi Ako, Yoshifumi Magari, Kazuaki Tamura, Akira Nishida
  • Publication number: 20220109147
    Abstract: A positive electrode plate that has a positive electrode active material layer formed on a positive electrode core, wherein the positive electrode core has, on an edge side, a thick portion which has a thickness that is greater than the thickness of a portion of the positive electrode core that has the positive electrode active material layer formed on both sides, and the positive electrode plate has a first region that extends into the thick portion from the portion of the positive electrode core that has the positive electrode active material layer formed on both sides and a second region that is positioned outside the first region in the thick portion. The average maximum diameter of the metal crystal grains that compose the first region is smaller than those of the second region.
    Type: Application
    Filed: December 24, 2019
    Publication date: April 7, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kazuaki Tamura, Yoshifumi Magari, Atsutoshi Ako, Akira Nishida, Kentaro Tsukamoto, Tomoyuki Yamada
  • Publication number: 20220059911
    Abstract: A secondary battery provided with: a belt-like positive electrode plate having a plurality of positive electrode tabs; and a positive electrode current collector which is connected so that the plurality of positive electrode tabs are stacked, wherein the positive electrode plate has a positive electrode core body and a positive electrode active material layer formed on the positive electrode core bodies. At one edge side of the positive electrode plate where the plurality of positive electrode tabs are provided, one surface of the positive electrode core body has formed thereon a first protrusion that protrudes from said surface of the positive electrode core body in the thickness direction of the positive electrode core body, whereas the other surface of the positive electrode core body has no protrusion formed to protrude from said other surface of the positive electrode core body in the thickness direction of the positive electrode core body.
    Type: Application
    Filed: December 17, 2019
    Publication date: February 24, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kazuaki Tamura, Yoshifumi Magari, Atsutoshi Ako, Akira Nishida, Kentaro Tsukamoto, Tomoyuki Yamada
  • Publication number: 20220021001
    Abstract: Provided are a highly reliable electrode plate and a secondary battery using the electrode plate. A positive electrode plate, which is for a secondary battery, has a positive electrode core body and a positive electrode active material layer formed on the positive electrode core body. The positive electrode core body has, at an end thereof, a thick part having a thickness larger than that of the center area of the positive electrode core body. The thick part includes a first projection that projects from one surface of the positive electrode core body in the thickness direction of the positive electrode core body. The positive electrode core body is formed of an aluminum alloy which contains 0.5-2.0 mass % of Mn.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 20, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kazuaki Tamura, Yoshifumi Magari, Atsutoshi Ako, Akira Nishida, Kentaro Tsukamoto, Tomoyuki Yamada
  • Patent number: 7867653
    Abstract: An alkaline storage battery system according to an aspect of the present invention, with which a partial charging-discharging is performed, includes an alkaline storage battery 10 including an electrode group having a nickel positive electrode 11, a hydrogen storage alloy negative electrode 12, a separator 13; an alkaline electrolyte; and an outer can 14 accommodating the electrode group and the alkaline electrolyte, and further includes a partial charge-discharge control unit for controlling charging-discharging of the battery 10. In addition, zinc (Zn) is added to nickel hydroxide that is a main positive electrode active material in the nickel positive electrode 11 with an addition amount of 5% by mass or less with respect to the mass of nickel in the positive electrode active material. The concentration of the alkaline electrolyte is 6.5 mol/L or less and the content of lithium in the alkaline electrolyte is 0.3 mol/L or more.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: January 11, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Makoto Ochi, Atsutoshi Ako, Yasuyuki Harada, Kazuhiro Kitaoka, Masao Takee
  • Publication number: 20100248024
    Abstract: In the alkaline storage battery system, zinc (Zn) is added to a nickel positive electrode 11 with an addition amount of 8% by mass or less with respect to the mass of nickel. A hydrogen storage alloy of a negative electrode 12 has an A5B19 type crystal structure, with a stoichiometric ratio (B/A) representing the molar ratio of component B to component A ranging from 3.6 to 3.9, inclusive, and is represented by a general formula of Ln1-xMgxNiy-aMa (where Ln is an element selected from rare earth elements including Y, and M is at least one kind of element selected from Al, Co, Mn, and Zn) in which the content of the element M is 1.0% by mass or less. An electrolyte has a concentration of 6.5 mol/L or less and contains Li of 0.3 mol/L or more, and the alkaline storage battery system is arranged to control partial charging-discharging.
    Type: Application
    Filed: March 23, 2010
    Publication date: September 30, 2010
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Hiromasa Sugii, Makoto Ochi, Shuhei Yoshida, Atsutoshi Ako, Yasuyuki Harada, Kazuhiro Kitaoka, Masao Takee
  • Publication number: 20090087745
    Abstract: An alkaline storage battery system includes an alkaline storage battery 10 including an electrode group having a hydrogen storage alloy negative electrode 11 using a hydrogen storage alloy as a negative electrode active material, a nickel positive electrode 12 using nickel hydroxide as a main positive electrode active material, and a separator 13, and further including an alkaline electrolyte, in an outer can 17, and is performed partial charge-discharge control. Here, the hydrogen storage alloy has at least A5B19 type crystal structure, and a stoichiometric ratio (B/A) representing a molar ratio of B component to A component in the A5B19 type crystal structure is 3.8 or more. According to the alkaline storage battery system of the present invention, an alkaline storage battery system that ensures high power, reduces the used amount of the hydrogen storage alloy significantly, and is controlled partial charging-discharging is obtained.
    Type: Application
    Filed: September 25, 2008
    Publication date: April 2, 2009
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Atsutoshi AKO, Makoto OCHI, Shuhei YOSHIDA, Kazuhiro KITAOKA, Masao TAKEE
  • Publication number: 20090087741
    Abstract: An alkaline storage battery system according to an aspect of the present invention, with which a partial charging-discharging is performed, includes an alkaline storage battery 10 including an electrode group having a nickel positive electrode 11, a hydrogen storage alloy negative electrode 12, a separator 13; an alkaline electrolyte; and an outer can 14 accommodating the electrode group and the alkaline electrolyte, and further includes a partial charge-discharge control unit for controlling charging-discharging of the battery 10. In addition, zinc (Zn) is added to nickel hydroxide that is a main positive electrode active material in the nickel positive electrode 11 with an addition amount of 5% by mass or less with respect to the mass of nickel in the positive electrode active material. The concentration of the alkaline electrolyte is 6.5 mol/L or less and the content of lithium in the alkaline electrolyte is 0.3 mol/L or more.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 2, 2009
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Makoto OCHI, Atsutoshi AKO, Yasuyuki HARADA, Kazuhiro KITAOKA, Masao TAKEE
  • Patent number: 6756156
    Abstract: In a rectangular alkaline storage battery, the sides of negative cores of negative electrode plates 10, which are disposed at the outermost positions of the group of electrode plates and oppose an outer casing can 40, are exposed. The pore ratios (ratio of total area taken up by pores to area of electrode plate) of the exposed cores must be made lower than those of the other unexposed cores. The pore ratio of the exposed negative core is specified as falling within a range of 10% to 40%. As a result, the negative electrode plates 10 are improved in binding strength, thereby inhibiting exfoliation of an active material. Further, there can be obtained a large rectangular alkaline storage battery which has superior permeability for a gas which would arise in the battery, an improved capacity ratio, and greater volumetric energy density.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: June 29, 2004
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yasuhiko Ikeda, Masao Takee, Teruhiko Imoto, Masao Inoue, Tetsuyuki Murata, Atsutoshi Ako
  • Patent number: 6641869
    Abstract: An active material slurry 12a obtained by a mixing a powder of the active material with a binder and a solvent for the binder is heated to a predetermined temperature inside a slurry reservoir 20, and the heated active material slurry 12a is coated and adhered to an electrically conductive core body 11. The resulting body is then fed inside a drying furnace 28 to dry the coated and adhered active material slurry 12a by heating, and is rolled to a predetermined thickness by passing it through a pair of rolling rolls 29, thereby obtaining an electrode for alkaline batteries comprising an active material layer 12 on the both sides of the electrically conductive core body 11.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: November 4, 2003
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yasuhiko Ikeda, Masao Takee, Teruhiko Imoto, Masao Inoue, Atsutoshi Ako, Yasumasa Kondo
  • Publication number: 20020160101
    Abstract: An active material slurry 12a obtained by a mixing a powder of the active material with a binder and a solvent for the binder is heated to a predetermined temperature inside a slurry reservoir 20, and the heated active material slurry 12a is coated and adhered to an electrically conductive core body 11. The resulting body is then fed inside a drying furnace 28 to dry the coated and adhered active material slurry 12a by heating, and is rolled to a predetermined thickness by passing it through a pair of rolling rolls 29, thereby obtaining an electrode for alkaline batteries comprising an active material layer 12 on the both sides of the electrically conductive core body 11.
    Type: Application
    Filed: February 28, 2002
    Publication date: October 31, 2002
    Inventors: Yasuhiko Ikeda, Masao Takee, Teruhiko Imoto, Masao Inoue, Atsutoshi Ako, Yasumasa Kondo
  • Publication number: 20020160267
    Abstract: In a rectangular alkaline storage battery, the sides of negative cores of negative electrode plates 10, which are disposed at the outermost positions of the group of electrode plates and oppose an outer casing can 40, are exposed. The pore ratios (ratio of total area taken up by pores to area of electrode plate) of the exposed cores must be made lower than those of the other unexposed cores. The pore ratio of the exposed negative core is specified as falling within a range of 10% to 40%. As a result, the negative electrode plates 10 are improved in binding strength, thereby inhibiting exfoliation of an active material. Further, there can be obtained a large rectangular alkaline storage battery which has superior permeability for a gas which would arise in the battery, an improved capacity ratio, and greater volumetric energy density.
    Type: Application
    Filed: February 27, 2002
    Publication date: October 31, 2002
    Inventors: Yasuhiko Ikeda, Masao Takee, Teruhiko Imoto, Masao Inoue, Tetsuyuki Murata, Atsutoshi Ako