Patents by Inventor Masaki Deguchi

Masaki Deguchi 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: 20120237208
    Abstract: an apparatus includes a first counter circuit that counts a value of first statistical information divided in the time-direction from a first period; a second counter circuit that counts a value of second statistical information divided in the time-direction from a second period following the first period; a control circuit that divides by a specific time period unit and acquires the value of the first statistical information and the value of the second statistical information, and causes a first memory to store the value of the first statistical information, and causes a second memory to store the value of the second statistical information; and a switching circuit that switches the value of the statistical information acquired by the control circuit from the value of the first statistical information to the value of the second statistical information upon a start of the second period.
    Type: Application
    Filed: January 31, 2012
    Publication date: September 20, 2012
    Applicant: Fujitsu Limited
    Inventors: Jumpei HONGO, Syuichi Musou, Masaki Deguchi
  • Patent number: 8247096
    Abstract: In a non-aqueous electrolyte secondary battery 1 including a positive electrode 11, a negative electrode 12, a separator 14, a positive electrode lead 15, a negative electrode lead 16, a gasket 17, and a housing case 18, the negative electrode 12 including a negative electrode active material layer 12b including an alloy-formable active material, a resin layer 13 is formed on the surface of the negative electrode active material layer 12b. The resin layer 13 includes a resin component with lithium ion conductivity and an additive for non-aqueous electrolyte. This configuration enables the battery performance to be maintained at a high level and the battery swelling to be suppressed, even when the number of charge/discharge cycles is increased, providing the non-aqueous electrolyte secondary battery 1 with a high level of safety.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: August 21, 2012
    Assignee: Panasonic Corporation
    Inventors: Masaya Ugaji, Masahiro Kinoshita, Taisuke Yamamoto, Masaki Deguchi
  • Publication number: 20120183865
    Abstract: The non-aqueous electrolyte for secondary batteries includes a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent. The non-aqueous solvent includes a fluorine-containing cyclic carbonate, propylene carbonate, and diethyl carbonate. The content WFCC of the fluorine-containing cyclic carbonate is 2 to 12 mass %, the content WPC of the propylene carbonate is 40 to 70 mass %, and the content WDEC of the diethyl carbonate is 20 to 50 mass % relative to the total of the non-aqueous solvent. The content of ethylene carbonate in the non-aqueous solvent may be 5 mass % or less.
    Type: Application
    Filed: June 30, 2011
    Publication date: July 19, 2012
    Inventor: Masaki Deguchi
  • Patent number: 8221922
    Abstract: A non-aqueous electrolyte secondary battery including: a positive electrode that contains a transition metal oxide capable of absorbing and desorbing lithium ions; a negative electrode that is capable of absorbing and desorbing lithium ions; a porous film that is interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein at least one selected from inorganic oxide and polyamide is contained in the porous film, and 5 to 15 vol % of ethylene carbonate is contained in a non-aqueous solvent that is contained in the non-aqueous electrolyte.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: July 17, 2012
    Assignee: Panasonic Corporation
    Inventors: Masaki Deguchi, Tooru Matsui, Hiroshi Yoshizawa
  • Publication number: 20120107700
    Abstract: In view of suppressing gas production during storage at high temperatures and during charge and discharge cycles while ensuring favorable low-temperature characteristics, the invention aims to provide a non-aqueous electrolyte in which the proportion of diethyl carbonate is reduced, and a non-aqueous electrolyte secondary battery using the same that has high safety. The non-aqueous electrolyte of the invention for use in secondary batteries includes ethylene carbonate, propylene carbonate, diethyl carbonate, and an additive, as a non-aqueous solvent. The additive is at least one of a fluorinated aromatic compound having a molecular weight of 90 to 200 and a fatty acid alkyl ester having a molecular weight of 80 to 240. A weight ratio WEC of ethylene carbonate, a weight ratio WPC of propylene carbonate, a weight ratio WDEC of diethyl carbonate, and a weight ratio WLV of the additive are 5 to 30 wt %, 15 to 60 wt %, 10 to 50 wt %, and 5 to 35 wt %, respectively, to the total of the non-aqueous electrolyte.
    Type: Application
    Filed: March 15, 2011
    Publication date: May 3, 2012
    Inventor: Masaki Deguchi
  • Patent number: 8148017
    Abstract: An electrochemical energy storage device includes a negative electrode which contains a carbon material and has a negative electrode potential of 1.4 V or less relative to a lithium reference when being charged, and a non-aqueous electrolyte solution prepared by dissolving a lithium salt, an ammonium salt, and at least one kind of fluorinated benzene selected among hexafluorobenzene, pentafluorobenzene, 1,2,3,4-tetrafluorobenzene, 1,2,3,5-tetrafluorobenzene, 1,2,4,5-tetrafluorobenzene and 1,2,3-trifluorobenzene, in a non-aqueous solvent.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: April 3, 2012
    Assignee: Panasonic Corporation
    Inventors: Tooru Matsui, Masaki Deguchi, Hiroshi Yoshizawa
  • Patent number: 8067120
    Abstract: The non-aqueous electrolyte secondary battery of the present invention includes a positive electrode containing a lithium-containing transition metal oxide as a positive electrode active material, a negative electrode, a separator interposed between the positive electrode and the negative electrode and a non-aqueous electrolyte. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, and the non-aqueous solvent includes a solvent having an electron-withdrawing substituent. The solvent having an electron-withdrawing substituent includes at least one selected from the group consisting of a sulfonic solvent, a nitrile solvent, a ketonic solvent, a fluorine-containing solvent, a chlorine-containing solvent and a carboxylic acid ester solvent. The separator includes a material containing an electron-withdrawing substituent or an atom having an unshared electron pair.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: November 29, 2011
    Assignee: Panasonic Corporation
    Inventors: Masaki Deguchi, Tooru Matsui, Hiroshi Yoshizawa
  • Patent number: 8067119
    Abstract: A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including an active material absorbing and desorbing lithium ions, a negative electrode including an active material absorbing and desorbing lithium ions, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The separator includes a material containing a substituent group with electron-withdrawing property. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, and the non-aqueous solvent includes at least one selected from the group consisting of a fluorine-containing aromatic solvent, a fluorine-containing cyclic carbonic acid ester, and a fluorine-containing cyclic carboxylic acid ester.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: November 29, 2011
    Assignee: Panasonic Corporation
    Inventors: Masaki Deguchi, Tooru Matsui, Hiroshi Yoshizawa
  • Patent number: 8064465
    Abstract: In a virtual LAN, a packet forwarding apparatus forwards IP packets and L2 packets using a single switch. The packet forwarding apparatus includes a switch that switches a media access control (MAC) packet using a MAC address of the MAC packet, and a packet format converter. The packet format converter converts a packet from an input and output unit into a packet having a MAC address according to information from the input and output unit, and converts a packet output from the switch to the input and output unit to a packet format compatible with the input and output unit according to the information of the input and output unit.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: November 22, 2011
    Assignee: Fujitsu Limited
    Inventors: Masaki Deguchi, Akira Miyasaka
  • Publication number: 20110200886
    Abstract: A non-aqueous electrolyte including a non-aqueous solvent and a solute dissolved in the non-aqueous solvent. The non-aqueous solvent includes ethylene carbonate, propylene carbonate, diethyl carbonate, and a first additive. The weight percentage WPC of the propylene carbonate relative to a total of the ethylene carbonate, propylene carbonate, and diethyl carbonate is 30 to 60% by weight. The ratio WPc/WPC of the weight percentage WPC of the propylene carbonate to a weight percentage WEC of the ethylene carbonate relative to the total satisfies 2.25?WPC/WPC?6. The first additive includes at least one of an unsaturated sultone and a sulfonic acid ester, and the weight percentage of the first additive in the whole non-aqueous electrolyte is 0.1 to 3% by weight.
    Type: Application
    Filed: September 9, 2010
    Publication date: August 18, 2011
    Inventor: Masaki Deguchi
  • Patent number: 7998615
    Abstract: The present invention relates to a nonaqueous electrolyte for electrochemical devices, and to electric double-layer capacitor and secondary battery using the said nonaqueous electrolyte. The nonaqueous electrolyte according to the present invention comprises a room temperature molten salt and a fluorohydrocarbon. The nonaqueous electrolyte is flame resistant and can suppress the rise in its viscosity. Therefore, high quality electrochemical devices can be obtained by using the nonaqueous electrolyte. The electric double-layer capacitor according to the present invention comprises a pair of polarizable electrode plates, a separator interposed between the pair of electrode plates, and the inventive nonaqueous electrolyte.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: August 16, 2011
    Assignee: Panasonic Corporation
    Inventors: Tooru Matsui, Masaki Deguchi, Hiroshi Yoshizawa
  • Patent number: 7990946
    Abstract: A node apparatus includes: a control unit setting up a path; a path setup time measuring unit measuring path setup time required to set up the path; a path setup time reporting unit reporting the path setup time to another node apparatus on a communication network; a path setup time storage unit storing the path setup time measured at another node apparatus on the communication network when the measured path setup time is reported from the other node apparatus; and an alternate path determining unit determining a path based on the path setup time of each node apparatus stored in the setup time storage unit.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: August 2, 2011
    Assignee: Fujitsu Limited
    Inventor: Masaki Deguchi
  • Publication number: 20110181249
    Abstract: In a charging method for a non-aqueous electrolyte secondary battery which comprises a positive electrode including a lithium-containing composite oxide as an active material, a negative electrode including a material capable of charging and discharging lithium ions as an active material, and a non-aqueous electrolyte, an open circuit voltage of the secondary battery is detected. When the detected value is smaller than a predetermined voltage x, charging is performed at a comparatively small current value B. When the detected value is equal to or greater than the predetermined voltage x and smaller than a predetermined voltage z, charging is performed at a comparatively great current value A. When the detected value is equal to or greater than the predetermined voltage z and smaller than a predetermined voltage y, charging is performed at a comparatively small current value C. When the detected value is greater than the predetermined voltage y, constant-voltage charging is performed or charging is terminated.
    Type: Application
    Filed: May 20, 2010
    Publication date: July 28, 2011
    Inventors: Masaki Deguchi, Masaya Ugaji
  • Publication number: 20110117437
    Abstract: The invention provides a positive electrode for a nonaqueous electrolyte secondary battery which is capable of alleviating generation of gas during charge/discharge with a nonaqueous electrolyte solution penetrated therein, and a method for fabricating the same. The positive electrode for the nonaqueous electrolyte secondary battery includes a current collector, and a positive electrode material mixture layer 22 formed on the current collector. The method includes reacting acidic gas or an acidic solution with the positive electrode which has been pressed by rolling, thereby providing a positive electrode for a nonaqueous electrolyte secondary battery including a positive electrode active material 23 which is capable of reversibly inserting and extracting lithium ions as the positive electrode material mixture layer, and in which lithium salt 24a, 25a except for lithium hydroxide and lithium carbonate is present at least on fracture surfaces 24, 25 of the positive electrode active material 23.
    Type: Application
    Filed: March 4, 2010
    Publication date: May 19, 2011
    Inventors: Kozo Watanabe, Masaki Deguchi
  • Publication number: 20110070497
    Abstract: A positive electrode for a lithium ion battery having a positive electrode active material layer including a lithium transition metal oxide such as a lithium nickel oxide as a positive electrode active material is washed with a washing fluid containing: an aprotic solvent such as propylene carbonate; and at least one of a fluorine-containing lithium salt such as LiPF6 and a hydrogen halide such as hydrogen fluoride. By washing the positive electrode with the washing fluid, a lithium halide is attached on a surface of the positive electrode active material in an amount of 300 to 4000 ?g per 1 g of the positive electrode active material.
    Type: Application
    Filed: March 17, 2010
    Publication date: March 24, 2011
    Inventor: Masaki Deguchi
  • Publication number: 20110053003
    Abstract: The invention relates to a lithium ion secondary battery including: a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a non-aqueous solvent including a sulfone compound, the positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on the surface of the positive electrode current collector, the positive electrode active material layer includes lithium-containing composite oxide particles and a fluorocarbon resin, and a coverage of the fluorocarbon resin relative to the surface area of the lithium-containing composite oxide particles is 20 to 65%. It is an object of the invention to provide a lithium ion secondary battery that is kept from deteriorating in rate characteristics over time, in particular, from significantly deteriorating in rate characteristics during storage at high temperatures.
    Type: Application
    Filed: February 4, 2010
    Publication date: March 3, 2011
    Inventor: Masaki Deguchi
  • Publication number: 20110045360
    Abstract: The invention relates to a lithium ion secondary battery including: a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a non-aqueous solvent including a fluoroether, the positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on the surface of the positive electrode current collector, the positive electrode active material layer includes lithium-containing composite oxide particles and a fluororesin, and a coverage of the fluororesin relative to the surface area of the lithium-containing composite oxide particles is 20 to 65%. It is an object of the invention to provide a lithium ion secondary battery that is kept from deteriorating in rate characteristics over time, in particular, from significantly deteriorating in rate characteristics during storage at high temperatures.
    Type: Application
    Filed: February 4, 2010
    Publication date: February 24, 2011
    Inventor: Masaki Deguchi
  • Publication number: 20110039155
    Abstract: An object of the invention is to inhibit the entry of LiOH and Li2CO3during production of a positive electrode, thereby improving the cycle characteristics, storage characteristics, and reliability of a non-aqueous electrolyte secondary battery. In a method for producing a positive electrode for a non-aqueous electrolyte secondary battery for achieving this object, first, a positive electrode is formed by supporting, on a positive electrode current collector, a positive electrode mixture layer including a lithium-containing composite oxide represented by general formula: LixMyMe1?yO2+? (wherein M represent at least one element selected from the group consisting of Ni, Co, and Mn, Me represents a metallic element different from M, x satisfies 0.98?x?1.10, y satisfies 0.9?y?y 1.0).
    Type: Application
    Filed: November 19, 2009
    Publication date: February 17, 2011
    Inventor: Masaki Deguchi
  • Publication number: 20110039163
    Abstract: Provided is a non-aqueous electrolyte capable of favorably suppressing the gas generation during storage in a high temperature environment and during charge/discharge cycling of a non-aqueous electrolyte secondary battery. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved in the non-aqueous solvent, wherein: the non-aqueous solvent includes ethylene carbonate, propylene carbonate, diethyl carbonate, and an additive; the additive includes a sultone compound and a cyclic carbonate having a C?C unsaturated bond; a weight percentage WPC of the propylene carbonate relative to a total of the ethylene carbonate, propylene carbonate, and diethyl carbonate is 30 to 60% by weight; a ratio WPC/WEC of the weight percentage WPC of the propylene carbonate to a weight percentage WEC of the ethylene carbonate relative to the total satisfies 2.
    Type: Application
    Filed: March 23, 2010
    Publication date: February 17, 2011
    Inventors: Masaki Deguchi, Shinji Kasamatsu
  • Patent number: 7879489
    Abstract: To provide a high-capacity non-aqueous electrolyte secondary battery that exhibits satisfactory charge/discharge cycle characteristics even in a high temperature environment. The battery has: a positive electrode including a nickel-containing lithium composite oxide; a negative electrode capable of charging and discharging; a separator interposed between the positive and negative electrodes; and a non-aqueous electrolyte containing a non-aqueous solvent and a solute dissolved therein. The non-aqueous electrolyte contains a fluorine atom-containing aromatic compound. The nickel-containing lithium composite oxide is represented by, for example, LiNixM1-x-yLyO2 where element M is at least one selected from the group consisting of Co and Mn; element L is at least one selected from the group consisting of Al, Sr, Y, Zr, Ta, Mg, Ti, Zn, B, Ca, Cr, Si, Ga, Sn, P, V, Sb, Nb, Mo, W and Fe; and x and y satisfy 0.1?x?1 and 0?y?0.1.
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: February 1, 2011
    Assignee: Panasonic Corporation
    Inventors: Masaki Deguchi, Tooru Matsui, Hiroshi Yoshizawa