Patents by Inventor Kenichi Kawase

Kenichi Kawase 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).

  • ANODE AND BATTERY
    Publication number: 20150079468
    Abstract: A battery including a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has a coat on an anode active material layer provided on an anode current collector. The coat contains a fluorine resin. A terminal of the fluorine resin is a hydroxyl group or the like capable of being fixed (for example, being absorbed or bound) on the surface of the anode active material layer (anode active material).
    Type: Application
    Filed: November 21, 2014
    Publication date: March 19, 2015
    Inventors: Takakazu Hirose, Hideki Nakai, Kenichi Kawase, Hiroyuki Yamaguchi, Tadahiko Kubota
  • Anode for lithium ion secondary battery, lithium ion secondary battery, electric tool, battery car, and electric power storage system
    Patent number: 8968935
    Abstract: A lithium ion secondary battery having more superior cycle characteristics is provided. The lithium ion secondary battery includes a cathode, an anode, and an electrolyte. The anode has an anode active material layer in which a first layer containing silicon as an anode active material, and a second layer containing silicon and a metal element as an anode active material are alternately layered on an anode current collector. At least one of a lamellar oxide-containing region and a lamellar nitrogen-containing region is inserted in at least one of the first layer and the second layer.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: March 3, 2015
    Assignee: Sony Corporation
    Inventors: Shunsuke Kurasawa, Kenichi Kawase, Takashi Fujinaga
  • Anode active material and battery
    Patent number: 8956758
    Abstract: An anode active material capable of preventing shape deformation due to expansion and shrinkage and a battery using the anode are provided. An anode active material layer contains a powdery anode active material containing Si or Sn as an element. The average degree of circularity of the anode active material is 0.90 or less. By decreasing the average degree of circularity, the surface area becomes wide, and the reactive region becomes large. As a result, an intense local reaction is prevented, and the number of cracks resulting from expansion and shrinkage are reduced.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: February 17, 2015
    Assignee: Sony Corporation
    Inventors: Kenichi Kawase, Tomoo Takada, Kensuke Yamamoto
  • Anode, method of manufacturing it, battery, and method of manufacturing it
    Patent number: 8951672
    Abstract: A battery capable of improving the cycle characteristics and the swollenness characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The node has an anode current collector and an anode active material layer provided thereon, and the anode active material layer contains a plurality of anode active material particles having silicon, and a metal material having a metal element not being alloyed with an electrode reactant in a gap between the anode active material particles.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: February 10, 2015
    Assignee: Sony Corporation
    Inventors: Takakazu Hirose, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Nozomu Morita
  • Anode and battery
    Patent number: 8940441
    Abstract: An anode capable of relaxing the stress due to expansion and shrinkage and a battery using the anode are provided. In the anode, an anode active material layer containing at least one of silicon and tin as an element is provided on both faces of a strip-shaped anode current collector. In the anode current collector and the anode active material layer, at least one penetrating portion that is cut out or slit to penetrate the anode current collector and the anode active material layer is formed to extend to include a longitudinal component of the anode current collector.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: January 27, 2015
    Assignee: Sony Corporatin
    Inventors: Takakazu Hirose, Kenichi Kawase, Isamu Konishiike, Masayuki Iwama, Koichi Matsumoto
  • Anode and method of manufacturing the same, and battery and method of manufacturing the same
    Patent number: 8932761
    Abstract: An anode wherein the anode active material layer includes anode active material particles made of an anode active material including at least one of silicon and tin as an element. An oxide-containing film including an oxide of at least one kind selected from the group consisting of silicon, germanium and tin is formed in a region in contact with an electrolytic solution of the surface of each anode active material particle. The region in contact with the electrolytic solution of the surface of each anode active material particle is covered with the oxide-containing film.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: January 13, 2015
    Assignee: Sony Corporation
    Inventors: Hiroyuki Yamaguchi, Hiroshi Horiuchi, Kenichi Kawase, Tadahiko Kubota, Hideki Nakai, Takakazu Hirose
  • Anode for lithium ion secondary battery, lithium ion secondary battery, electric tool, battery car, and electric power storage system
    Patent number: 8932757
    Abstract: A lithium ion secondary battery having superior cycle characteristic is provided. The lithium ion secondary battery includes a cathode, an anode and an electrolyte. The anode has an anode active material layer including a plurality of anode active material fibers containing silicon as an element provided on an anode current collector.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: January 13, 2015
    Assignee: Sony Corporation
    Inventors: Takashi Fujinaga, Shunsuke Kurasawa, Momoe Adachi, Kenichi Kawase
  • Current collector, anode, and battery
    Patent number: 8932744
    Abstract: A battery capable of improving the cycle characteristics is provided. A current collector containing copper (Cu), in which ratio I (200)/I (111) between intensity I (200) of a peak originated in (200) crystal plane of copper obtained by X-ray diffraction and intensity I (111) of a peak originated in (111) crystal plane thereof is in the range from 0.5 to 1.5.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: January 13, 2015
    Assignee: Sony Corporation
    Inventors: Takakazu Hirose, Masayuki Iwama, Kenichi Kawase
  • Battery including a fluorine resin
    Patent number: 8932756
    Abstract: A battery. including a cathode, an anode, and an electrolytic solution where at least one of the cathode, the anode, the separator, and/or the electrolytic solution contains at a fluorine resin and is effective to improve cycle characteristics.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: January 13, 2015
    Assignee: Sony Corporation
    Inventors: Takakazu Hirose, Hideki Nakai, Kenichi Kawase, Hiroyuki Yamaguchi, Tadahiko Kubota
  • SECONDARY BATTERY-USE ACTIVE MATERIAL, SECONDARY BATTERY, AND ELECTRONIC APPARATUS
    Publication number: 20140349187
    Abstract: A secondary battery capable of obtaining superior battery characteristics is provided. The secondary battery of the present technology includes a cathode, an anode including an active material, and an electrolytic solution. The active material includes a core section and covering section, the core section being capable of inserting and extracting lithium ions, and the covering section being provided in at least part of a surface of the core section and being a low-crystalline or a noncrystalline. The core section includes Si and O as constituent elements, and an atom ratio x (O/Si) of O with respect to Si satisfies O?x<0.5. The covering section includes Si and O as constituent elements, and an atom ratio y (O/Si) of O with respect to Si satisfies 0.5?y?1.8. The covering section has voids, and a carbon-containing material is provided in at least part of the voids.
    Type: Application
    Filed: December 5, 2012
    Publication date: November 27, 2014
    Inventors: Takakazu Hirose, Kenichi Kawase, Norihiro Shimoi, Shinji Tanaka
  • Electrode and battery
    Patent number: 8889291
    Abstract: A battery realizing the superior cycle characteristics is provided. An electrode includes a current collector including an active-material-layer-formation region and a flat and smooth region having a surface roughness smaller than that of the active-material-layer-formation region, and an active material layer provided in the active-material-layer-formation region of the current collector. An electrode lead is connected to the flat and smooth region.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: November 18, 2014
    Assignee: Sony Corporation
    Inventors: Masayuki Iwama, Kenichi Kawase, Yoshikazu Kato, Nozomu Morita
  • Anode active material, anode, and battery
    Patent number: 8852802
    Abstract: A battery capable of improving the cycle characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode active material layer that contains an anode active material containing silicon on an anode current collector, and intensity ratio I1/I2 between peak intensity I1 originated in (220) crystalline plane of silicon obtained by X-ray diffraction and peak intensity I2 originated in (111) crystalline plane of silicon obtained by X-ray diffraction is 0.05 or more.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: October 7, 2014
    Assignee: Sony Corporation
    Inventors: Takakazu Hirose, Takayuki Fujii, Kazunori Noguchi, Kenichi Kawase
  • Battery
    Patent number: 8852801
    Abstract: A battery with more superior reliability is provided. The battery includes: a battery element in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, wherein the anode active material layer is provided to occupy a first region that is overlapped with a cathode active material layer formation region in which the cathode active material layer is provided on the cathode current collector and a peripheral region thereof in the anode, and out of a second region adjacent to the first region in the longitudinal direction in the anode, a width of a third region in which the anode active material layer is not formed and the anode current collector is exposed is smaller than a width of the first region.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: October 7, 2014
    Assignee: Sony Corporation
    Inventors: Tomoo Takada, Kenichi Kawase
  • ANODE AND SECONDARY BATTERY
    Publication number: 20140295270
    Abstract: A secondary battery capable of improving cycle characteristics is provided. An anode includes: an anode active material layer on an anode current collector, the anode active material layer including a plurality of anode active material particles, in which the average particle area of the plurality of anode active material particles observed from a surface of the anode active material layer is within a range of 1 ?m2 to 60 ?m2 both inclusive.
    Type: Application
    Filed: June 12, 2014
    Publication date: October 2, 2014
    Inventors: Momoe Adachi, Shunsuke Kurasawa, Isamu Konishiike, Kenichi Kawase
  • SECONDARY BATTERY
    Publication number: 20140295263
    Abstract: A secondary battery includes: a cathode and an anode that are opposed to each other with a separator in between; and an electrolytic solution, wherein the cathode includes a cathode current collector and a cathode active material layer provided between the cathode current collector and the separator, the anode includes an anode current collector and an anode active material layer provided between the anode current collector and the separator, one or more of the cathode, the anode, and the separator includes a plurality of thermally-conductive particles in a region between the cathode current collector and the anode current collector, and heat conductivity of the thermally-conductive particles is larger in a second direction that intersects with a first direction, in which the cathode and the anode are opposed to each other, than in the first direction.
    Type: Application
    Filed: March 20, 2014
    Publication date: October 2, 2014
    Applicant: Sony Corporation
    Inventors: Masayuki Iwama, Kaoru Abe, Keiichi Kagami, Kenichi Kawase, Tomoo Takada
  • Negative electrode for use with secondary battery and secondary battery using such negative electrode
    Patent number: 8802286
    Abstract: A negative electrode for a secondary battery includes a negative electrode current collector and a negative electrode active material layer provided in the negative electrode current collector and which is alloyed with the negative electrode current collector at least at a part of an boundary face between it and the negative electrode current collector, wherein the negative electrode current collector has a first surface on which the negative electrode active material layer is formed and a second surface on which the negative electrode active material layer is not formed, the negative electrode having a portion in which the second surfaces of the negative electrode current collector are opposed to each other.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: August 12, 2014
    Assignee: Sony Corporation
    Inventors: Isamu Konishiike, Kenichi Kawase, Shigeru Fujita, Momoe Adachi
  • Anode and secondary battery
    Patent number: 8795886
    Abstract: A secondary battery capable of improving cycle characteristics is provided. An anode includes: an anode active material layer on an anode current collector, the anode active material layer including a plurality of anode active material particles, in which the average particle area of the plurality of anode active material particles observed from a surface of the anode active material layer is within a range of 1 ?m2 to 60 ?m2 both inclusive.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: August 5, 2014
    Assignee: Sony Corporation
    Inventors: Momoe Adachi, Shunsuke Kurasawa, Isamu Konishiike, Kenichi Kawase
  • ANODE AND BATTERY
    Publication number: 20140162120
    Abstract: A battery including a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an insulative coat on an anode active material layer provided on an anode current collector. The coat contains an insulating material such as a meal hydroxide and a metal oxide. The coat is in a form of plate divided into a plurality of portions. The insulation property of the coat prevents internal short circuit. A plurality of portions of the coat prevent separation of the anode active material layer and decomposition of the electrolytic solution. Further, even when short circuit occurs, heat generation is prevented by heat absorption characteristics of the coat.
    Type: Application
    Filed: February 10, 2014
    Publication date: June 12, 2014
    Applicant: Sony Corporation
    Inventors: Takayuki Fujii, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Kensuke Yamamoto
  • ANODE FOR SECONDARY BATTERY, SECONDARY BATTERY, AND METHOD OF MANUFACTURING ANODE FOR SECONDARY BATTERY
    Publication number: 20140154566
    Abstract: An anode for a secondary battery capable of improving cycle characteristics, a secondary battery using the anode, and a method of manufacturing an anode for secondary battery. An anode active material layer is formed by vapor phase deposition method, and contains Si as an element. In the anode active material layer, there are a plurality of primary particles grown in the thickness direction. The primary particles aggregate and form a plurality of secondary particles. At least some of the primary particles have shape curved in the identical direction to an anode current collector on the cross section in the thickness direction. Thereby, stress due to expansion and shrinkage due to charge and discharge can be relaxed.
    Type: Application
    Filed: February 10, 2014
    Publication date: June 5, 2014
    Applicant: Sony Corporation
    Inventors: Takakazu Hirose, Isamu Konishiike, Kenichi Kawase
  • Anode and battery
    Patent number: 8741481
    Abstract: A battery capable of obtaining superior cycle characteristics and safety is provided. The battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an insulative coat on an anode active material layer provided on an anode current collector. The coat contains an insulating material such as a meal hydroxide and a metal oxide. The coat is in a form of plate divided into a plurality of portions. The insulation property of the coat prevents internal short circuit. A plurality of portions of the coat prevent separation of the anode active material layer and decomposition of the electrolytic solution. Further, even when short circuit occurs, heat generation is prevented by heat absorption characteristics of the coat.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: June 3, 2014
    Assignee: Sony Corporation
    Inventors: Takayuki Fujii, Kenichi Kawase, Hideki Nakai, Rikako Imoto, Kensuke Yamamoto