Patents by Inventor Sumio Mori

Sumio Mori 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: 9484565
    Abstract: In an energy storage device including a positive electrode plate and a negative electrode plate that are insulated from each other with a separator interposed therebetween, and a non-aqueous electrolyte, the separator includes a base material layer and a coating layer that is disposed on at least one surface of the base material layer, and the separator has an air permeability of the base material layer of 25 (sec/100 cc) or greater and 250 (sec/100 cc) or less, a porosity of the base material layer of 45% or greater, an air permeability of an interface between the base material layer and the coating layer of 15 (sec/100 cc) or less, and an air permeability of the coating layer of 15 (sec/100 cc) or less.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: November 1, 2016
    Assignee: GS Yuasa International Ltd.
    Inventors: Akihiko Miyazaki, Sumio Mori, Tomonori Kako
  • Patent number: 9455091
    Abstract: An electric storage device having a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode has a positive substrate layer, a positive composite layer containing a positive active material, and an undercoat layer located between the positive substrate layer and the positive composite layer. A density of the positive composite layer is 2.1 g/cm3 or more and 2.7 g/cm3 or less. The positive electrode has the rate of increase in sheet resistance after a solvent immersion test of 30% or less. The undercoat layer contains a binder selected from the group consisting of chitosan derivatives, cellulose derivatives and acrylic acid derivatives.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: September 27, 2016
    Assignee: GS Yuasa International Ltd.
    Inventors: Akihiko Miyazaki, Sumio Mori, Tomonori Kako, Kenta Nakai
  • Publication number: 20160276667
    Abstract: An energy storage device includes a positive electrode, a negative electrode, and a nonaqueous electrolyte solution. The negative electrode includes an active material layer, and the active material layer has pores having a pore size of 0.1 ?m or more and 1.0 ?m or less, and a total volume of the pores is 0.26 cm3/g or more and 0.46 cm3/g or less.
    Type: Application
    Filed: March 17, 2016
    Publication date: September 22, 2016
    Inventors: Kenta NAKAI, Akihiko MIYAZAKI, Tomonori KAKO, Sumio MORI
  • Publication number: 20160276702
    Abstract: An energy storage device includes: an electrode assembly which includes: an approximately rectangular positive electrode; an approximately rectangular negative electrode which is stacked alternately with the positive electrode; and a strip-like elongated separator having a base material layer and an inorganic layer which is made to overlap with the first base material layer, wherein the elongated separator is arranged between the positive electrode and the negative electrode, and the base material layer of the elongated separator faces the negative electrode in an opposed manner between the positive electrode and the negative electrode.
    Type: Application
    Filed: March 14, 2016
    Publication date: September 22, 2016
    Inventors: Kenta NAKAI, Tomonori KAKO, Akihiko MIYAZAKI, Sumio MORI
  • Patent number: 9450222
    Abstract: Provided is an electric storage device provided with: a positive electrode including a positive electrode substrate and a positive electrode mixture layer, the positive electrode mixture layer being formed on the positive electrode substrate and containing a positive electrode active material; a negative electrode including a negative electrode substrate and a negative electrode mixture layer, the negative electrode mixture layer being formed on the negative electrode substrate and containing a negative electrode active material; and a separator disposed between the positive electrode and the negative electrode. In the electric storage device, the separator yields a triple value of standard deviation of local air resistance, as measured within a 5-mm diameter circle, of at least 20 seconds/10 cc but not more than 350 seconds/10 cc.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: September 20, 2016
    Assignee: GS Yuasa International Ltd.
    Inventors: Akihiko Miyazaki, Sumio Mori
  • Publication number: 20160248065
    Abstract: An energy storage device includes a positive electrode, a negative electrode, and an insulating layer arranged between these electrodes to electrically insulate these electrodes. The negative electrode includes a composite layer containing active material particles. The composite layer of the negative electrode, and the positive electrode are arranged to face each other across the insulating layer. The insulating layer contains electrically insulating particles, and is made porous by a gap between these particles. The composite layer of the negative electrode is made porous by a gap between the active material particles, and “?0.8?Log B?Log A?1.0” is satisfied in which in a pore distribution of the composite layer, a pore peak diameter is represented by A (?m), and in a pore distribution of the insulating layer, a peak diameter is represented by B (?m).
    Type: Application
    Filed: February 24, 2016
    Publication date: August 25, 2016
    Inventors: Akihiko MIYAZAKI, Kenta NAKAI, Tomonori KAKO, Sumio MORI
  • Patent number: 9397364
    Abstract: An electric storage device includes: an electrode assembly in which electrodes are wound such that paired curved portions and a straight portion connecting the paired curved portions are formed; a case which houses the electrode assembly, the case comprising a convex part protruding toward the straight portion of the electrode assembly to support the straight portion; and a support portion which supports the curved portion toward an inside of the electrode assembly.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: July 19, 2016
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Akihiko Miyazaki, Sumio Mori, Tomonori Kako, Kenta Nakai
  • Publication number: 20160093860
    Abstract: An energy storage device includes a positive electrode provided with a positive composite layer containing a positive active material, a negative electrode provided with a negative composite layer containing a negative active material, and a separator partitioning between the positive electrode and the negative electrode, wherein the separator includes a substrate uniaxially drawn into a sheet shape and a coating layer coating at least one of surfaces of the substrate, and the coating layer has an anisotropic structure with orientation in a direction different from a drawing direction of the substrate.
    Type: Application
    Filed: September 24, 2015
    Publication date: March 31, 2016
    Inventors: Akihiko MIYAZAKI, Sumio MORI, Tomonori KAKO
  • Publication number: 20160064775
    Abstract: Provided is an energy storage device including an electrolyte solution including a compound represented by the general formula (1), a compound represented by the general formula (2), and a compound represented by the general formula (3):
    Type: Application
    Filed: August 24, 2015
    Publication date: March 3, 2016
    Inventors: Tomonori KAKO, Sumio MORI, Akihiko MIYAZAKI, Kenta NAKAI
  • Publication number: 20150357670
    Abstract: An energy storage device includes: an electrode assembly; a case for storing the electrode assembly therein, the case having an electrolyte solution sealing portion where an electrolyte solution pouring hole formed in the case is sealed; and at least one partition member arranged in a gap formed between the case and the electrode assembly stored in the case. The partition member partitions the gap in the winding axis direction of the electrode assembly by surrounding the electrode assembly in the winding direction of the electrode. The electrolyte solution pouring hole is arranged at a position closer to one end of the electrode assembly than the partition member close to one end of the case is in the winding axis direction.
    Type: Application
    Filed: June 4, 2015
    Publication date: December 10, 2015
    Inventors: Taro YAMAFUKU, Sumio Mori
  • Publication number: 20150349326
    Abstract: An energy storage device comprising: a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, a nonaqueous electrolyte, and an insulating layer disposed between the positive electrode and the separator, wherein the positive electrode contains a compound represented by LiaNibCocMdWxNbyZrzO2 (provided that a, b, c, d, x, y and z satisfy the equations of 0?a?1.2, 0?b?1, 0.1?c?0.4, 0?d?0.5, 0?x?0.1, 0?y?0.1, 0?z?0.1 and b+c+d=1, and M denotes at least one kind of element selected from the group consisting of Mn, Ti, Cr, Fe, Co, Cu, Zn, Al, Ge, Sn and Mg) as a positive active material and the negative electrode contains hardly graphitizable carbon with a D50 particle diameter greater than or equal to 1.0 ?m and less than or equal to 6.0 ?m as a negative active material.
    Type: Application
    Filed: May 27, 2015
    Publication date: December 3, 2015
    Inventors: Akihiko MIYAZAKI, Sumio MORI, Tomonori KAKO, Kenta NAKAI
  • Publication number: 20150340677
    Abstract: An energy storage device comprises a positive electrode, a negative electrode, a separator arranged between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative electrode has a negative substrate layer, and a negative composite layer arranged on the surface of the negative substrate layer. The separator has a separator substrate layer. The negative composite layer contains a non-graphitizable carbon having a particle diameter D50 of 2.0 ?m or more and 6.0 ?m or less. A corrected negative electrode density, which is defined as a value obtained by dividing, by a thickness of the separator substrate layer, a value obtained by multiplying a density of the negative composite layer by a thickness of the negative composite layer, is 1.2 (g/cm3) or more and 5.1 (g/cm3) or less.
    Type: Application
    Filed: May 22, 2015
    Publication date: November 26, 2015
    Inventors: Akihiko MIYAZAKI, Sumio MORI, Tomonori KAKO, Kenta NAKAI
  • Publication number: 20150340737
    Abstract: A method including: a placing step of placing an electrode assembly including a positive electrode that contains a positive active material and a negative electrode that contains a negative active material, and an electrolyte solution containing an additive in a container; a charging step of charging the electrode assembly placed in the container; and a hermetically sealing step of hermetically sealing the container after the charging step. When starting charging in the charging step, the electrolyte solution contains 1.0 mass % or less of lithium difluoro bis(oxalate)phosphate as the additive. The charge voltage in the charging step is 4.0 V or more.
    Type: Application
    Filed: May 19, 2015
    Publication date: November 26, 2015
    Inventors: Tomonori KAKO, Sumio MORI, Akihiko MIYAZAKI, Kenta NAKAI
  • Patent number: 9054388
    Abstract: Provided is an energy storage device which employs the use of a separator provided with a layer having poor thermal properties such as a heat resistant coated layer and is capable of inhibiting a decrease in performance. The energy storage device includes: a wound body including a positive electrode, a negative electrode, and separators which are layered and wound, the separators being interposed between the positive electrode and the negative electrode and having a first surface and a second surface, the first surface having thermal bonding properties superior to thermal bonding properties of the second surface; and an insulation sheet wound around an outermost layer of the wound body. At least one of the separators is bonded to the insulation sheet via the first surface thereof.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: June 9, 2015
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Akihiko Miyazaki, Sumio Mori, Tomonori Kako
  • Publication number: 20150092320
    Abstract: An electric storage device having a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode has a positive substrate layer, a positive composite layer containing a positive active material, and an undercoat layer located between the positive substrate layer and the positive composite layer. A density of the positive composite layer is 2.1 g/cm3 or more and 2.7 g/cm3 or less. The positive electrode has the rate of increase in sheet resistance after a solvent immersion test of 30% or less. The undercoat layer contains a binder selected from the group consisting of chitosan derivatives, cellulose derivatives and acrylic acid derivatives.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 2, 2015
    Inventors: Akihiko MIYAZAKI, Sumio MORI, Tomonori KAKO, Kenta NAKAI
  • Publication number: 20150093647
    Abstract: A battery includes a positive electrode, a negative electrode including a negative active material layer containing hardly-graphitizable carbon as a negative active material and an aqueous binder, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative active material layer has a density of not less than 0.81 g/cc and not more than 1.01 g/cc. The negative active material has a particle size D90 of not less than 1.9 ?m and not more than 11.5 ?m, the particle size D90 being a particle size at which the cumulative volume is 90% in the particle size distribution.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 2, 2015
    Inventors: Tomonori KAKO, Sumio MORI, Akihiko MIYAZAKI, Kenta NAKAI
  • Publication number: 20150093620
    Abstract: An electric storage device includes: an electrode assembly in which electrodes are wound such that paired curved portions and a straight portion connecting the paired curved portions are formed; a case which houses the electrode assembly, the case comprising a convex part protruding toward the straight portion of the electrode assembly to support the straight portion; and a support portion which supports the curved portion toward an inside of the electrode assembly.
    Type: Application
    Filed: October 1, 2014
    Publication date: April 2, 2015
    Inventors: Akihiko MIYAZAKI, Sumio Mori, Tomonori Kako, Kenta Nakai
  • Patent number: 8986881
    Abstract: An energy storage element, wherein a non-aqueous electrolyte contains lithium difluorobis(oxalato)phosphate that is a first additive represented by Formula (1): and lithium tetrafluorooxalatophosphate that is a second additive represented by Formula (2): wherein the amount of the first additive to be added is not less than 0.3% by weight and not more than 1.0% by weight based on the total weight of the non-aqueous electrolyte, and the amount of the second additive to be added is not less than 0.05 times and not more than 0.3 times the amount of the first additive to be added.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: March 24, 2015
    Assignee: GS Yuasa International Ltd.
    Inventors: Tomonori Kako, Sumio Mori, Kenta Nakai, Akihiko Miyazaki
  • Patent number: 8932765
    Abstract: An object is to provide an electrode assembly for an electric storage device, such as a nonaqueous electrolyte cell, and an electric storage device that are capable of preventing increase of a short-circuit current at the time of occurrence of a short-circuit within a cell and have high safety. In order to achieve the object, provided is an electrode assembly for an electric storage device including a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode, in which at least one of the positive electrode and the negative electrode includes a current collector, an active material layer formed on at least one face of the current collector, and an undercoat layer formed between the current collector and the active material layer and including an organic binder that evaporates and decomposes when heated to a predetermined temperature or more.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: January 13, 2015
    Assignee: GS Yuasa International Ltd.
    Inventors: Akihiko Miyazaki, Sumio Mori, Taro Yamafuku, Minoru Teshima
  • Publication number: 20140376160
    Abstract: An electric storage device includes: a positive electrode; a negative electrode; and a separator placed between the positive electrode and the negative electrode. The positive electrode includes a positive electrode substrate, a positive active material layer formed on the positive electrode substrate, and a protective layer that covers at least one of side surfaces in a width direction of the positive active material layer. The negative electrode includes a negative electrode substrate and a negative active material layer formed on the negative electrode substrate. The separator includes a separator substrate opposed to the negative active material layer, and an inorganic layer containing a binder, the inorganic layer formed on the separator substrate and opposed to the positive active material layer.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 25, 2014
    Inventors: Tomonori Kako, Sumio Mori, Akihiko Miyazaki