Patents by Inventor Kunihiko Mineya

Kunihiko Mineya 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: 20190013543
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly including a negative electrode and a positive electrode including a positive electrode active material mix layer containing a lithium-transition metal composite oxide which is a positive electrode active material; a nonaqueous electrolyte; and a battery case that houses the electrode assembly and the nonaqueous electrolyte. The positive electrode active material has a film formed thereon and the film contains 0.04 ?mol to 0.19 ?mol of sulfur per square meter of the specific surface area of particles of the positive electrode active material.
    Type: Application
    Filed: June 27, 2018
    Publication date: January 10, 2019
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yohei Tao, Mio Nosaka, Masao Inoue, Kunihiko Mineya, Akihito Komatsu
  • Patent number: 9391315
    Abstract: A negative electrode for a lithium ion battery 10 includes a negative electrode current collector 11, a negative electrode active material layer 14, and a lithium silicate layer 15. The negative electrode active material layer 14 contains silicon. The lithium silicate layer 15 contains lithium, oxygen, and silicon forming a Li—O—Si bond, and is formed at the interface between the negative electrode current collector 11 and the negative electrode active material layer 14. The negative electrode active material layer 14 and the lithium silicate layer 15 may be composed of columnar bodies.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: July 12, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuya Iwamoto, Kunihiko Mineya, Shuji Ito
  • Patent number: 8945242
    Abstract: A positive electrode plate 5, a separator 7, and a negative electrode plate 6 are prepared. The positive electrode plate 5, the separator 7, and the negative electrode plate 6 are combined so as to form a spirally-wound electrode assembly 4. A winding end portion 9 of the electrode assembly 4 is fixed with a heat-sensitive adhesive (preferably, a heat-sensitive adhesive tape 10) whose adhesive force can be reduced by heating or cooling. The electrode assembly 4 is placed in an outer casing 1, and then the ambient temperature of the electrode assembly 4 is adjusted so that the electrode assembly 4 is loosened due to reduction in the adhesive force of the heat-sensitive adhesive. An electrolyte solution is injected into the outer casing 1.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: February 3, 2015
    Assignee: Panasonic Corporation
    Inventors: Kunihiko Mineya, Tatsuki Hiraoka
  • Patent number: 8920953
    Abstract: A lithium ion secondary battery includes: an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator; and an elastic member. The electrode assembly is wound around an axis into a flat shape having a curved end defining a corner portion. The elastic member is arranged inside the electrode assembly and into at least the corner portion of the electrode assembly such that at least a portion of the elastic member is positioned between at least a portion of one of the positive electrode plate and the negative electrode plate and at least a portion of the separator in a direction perpendicular to the axis. The elastic member is made of a material having porosity.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: December 30, 2014
    Assignee: Panasonic Corporation
    Inventor: Kunihiko Mineya
  • Patent number: 8715848
    Abstract: An electrode assembly (30) is formed by combining a positive electrode plate (14), a separator (15), and a negative electrode plate (18), and the electrode assembly (30) was wound. An insulating member (21) having a hollow portion (22) is placed on the positive electrode plate (14), the negative electrode plate (18), or the separator (15) before the end of the winding step so that the insulating member (21) is incorporated inside the outermost of the electrode assembly (30) and into a corner portion (31) of the electrode assembly (30) in the winding direction. After a winding end portion (32) of the electrode assembly (30) is fixed, the hollow portion (22) is broken. Thereby, a space (20) resulting from the hollow portion (22) is formed inside the outermost of the electrode assembly (30).
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: May 6, 2014
    Assignee: Panasonic Corporation
    Inventors: Kunihiko Mineya, Katsumi Kashiwagi
  • Publication number: 20130232773
    Abstract: A positive electrode plate 5, a separator 7, and a negative electrode plate 6 are prepared. The positive electrode plate 5, the separator 7, and the negative electrode plate 6 are combined so as to form a spirally-wound electrode assembly 4. A winding end portion 9 of the electrode assembly 4 is fixed with a heat-sensitive adhesive (preferably, a heat-sensitive adhesive tape 10) whose adhesive force can be reduced by heating or cooling. The electrode assembly 4 is placed in an outer casing 1, and then the ambient temperature of the electrode assembly 4 is adjusted so that the electrode assembly 4 is loosened due to reduction in the adhesive force of the heat-sensitive adhesive. An electrolyte solution is injected into the outer casing 1.
    Type: Application
    Filed: November 28, 2011
    Publication date: September 12, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Kunihiko Mineya, Tatsuki Hiraoka
  • Publication number: 20120107684
    Abstract: A negative electrode for a lithium ion battery 10 includes a negative electrode current collector 11, a negative electrode active material layer 14, and a lithium silicate layer 15. The negative electrode active material layer 14 contains silicon. The lithium silicate layer 15 contains lithium, oxygen, and silicon forming a Li—O—Si bond, and is formed at the interface between the negative electrode current collector 11 and the negative electrode active material layer 14. The negative electrode active material layer 14 and the lithium silicate layer 15 may be composed of columnar bodies.
    Type: Application
    Filed: April 21, 2011
    Publication date: May 3, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Kazuya Iwamoto, Kunihiko Mineya, Shuji Ito
  • Publication number: 20110318621
    Abstract: An electrode assembly (30) is formed by combining a positive electrode plate (14), a separator (15), and a negative electrode plate (18), and the electrode assembly (30) was wound. An insulating member (21) having a hollow portion (22) is placed on the positive electrode plate (14), the negative electrode plate (18), or the separator (15) before the end of the winding step so that the insulating member (21) is incorporated inside the outermost of the electrode assembly (30) and into a corner portion (31) of the electrode assembly (30) in the winding direction. After a winding end portion (32) of the electrode assembly (30) is fixed, the hollow portion (22) is broken. Thereby, a space (20) resulting from the hollow portion (22) is formed inside the outermost of the electrode assembly (30).
    Type: Application
    Filed: January 12, 2011
    Publication date: December 29, 2011
    Inventors: Kunihiko Mineya, Katsumi Kashiwagi
  • Publication number: 20110311852
    Abstract: A lithium ion secondary battery (10) includes: an electrode assembly (30) including a positive electrode plate (14), a negative electrode plate (18), and a separator (15), and wound into a flat shape; and an elastic member (21) having porosity and incorporated inside the outermost of the electrode assembly (30) and into a corner portion (31) of the electrode assembly (30) in the winding direction. The elastic member (21) is formed of a foam of at least one material selected from the group consisting of polyethylene, polypropylene, and polyurethane, for example.
    Type: Application
    Filed: January 12, 2011
    Publication date: December 22, 2011
    Inventor: Kunihiko Mineya
  • Publication number: 20110143195
    Abstract: A negative electrode 10 for a lithium ion battery of the present invention includes a negative electrode current collector 11, protrusions 13 formed so as to be spaced apart from each other on a surface of the negative electrode current collector 11, columns 12 supported on the protrusions 13 one by one, and a coating layer 15 coating a surface of each of the columns 12. The columns 12 include a negative electrode active material including either one of silicon and tin, and further include lithium absorbed thereinto. The coating layer 15 contains at least one of lithium carbonate and lithium fluoride and is formed by exposing the columns 12 to an atmosphere with a dew point temperature of ?60° C. or higher and 0° C. or lower.
    Type: Application
    Filed: June 17, 2010
    Publication date: June 16, 2011
    Inventors: Shuji Ito, Tatsuki Hiraoka, katsumi Kashiwagi, Hideharu Takezawa, Masaya Ugaji, Kunihiko Mineya
  • Publication number: 20090233176
    Abstract: An object of the present invention is to provide a non-aqueous electrolyte secondary battery that is excellent in cycle characteristics even in a high-temperature environment and high in thermal stability. The non-aqueous electrolyte secondary battery of the present invention comprises at least one of an active material A and an active material C, and an active material B as positive electrode active materials. The active material A is LixCoO2 (0.9?x?1.2). The active material B is LixNiyMnzM1-y-zO2 (0.9?x?1.2, 0.1?y?0.5, 0.2?z?0.5, 0.2?1?y?z?0.5 and 0.9?y/z?2.5; and M is at least one selected from the group consisting of Co, Mg, Al, Ti, Sr, Ca, V, Fe, Y, Zr, Mo, Tc, Ru, Ta, W and Re). The active material C is LixCo1-aMaO2 (0.9?x?1.2 and 0.005?a?0.1; and M is at least one selected from the group consisting of Mg, Al, Ti, Sr, Mn, Ni, Ca, V, Fe, Y, Zr, Mo, Tc, Ru, Ta, W, Re, Yb, Cu, Zn and Ba).
    Type: Application
    Filed: December 15, 2006
    Publication date: September 17, 2009
    Inventors: Yosuke Kita, Yukishige Inaba, Kunihiko Mineya, Takeshi Yao