Patents by Inventor Hitoshi Ishikawa

Hitoshi Ishikawa 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: 20160226099
    Abstract: The present invention provides a lithium ion secondary battery comprising: a positive electrode; a negative electrode comprising a negative electrode active material comprising at least one carbon material selected from the group consisting of a natural graphite, an artificial graphite, a non-graphitizable carbon and a graphitizable carbon; and an electrolyte solution comprising a specific cyclic disulfonate ester compound and an acid anhydride.
    Type: Application
    Filed: August 28, 2014
    Publication date: August 4, 2016
    Inventors: Takeshi AZAMI, Hitoshi ISHIKAWA, Noboru YOSHIDA, Ikiko SHIMANUKI, Kazuaki MATSUMOTO, Makihiro OTOHATA
  • Publication number: 20160174127
    Abstract: An information processing apparatus includes: a path information acquiring part acquiring path information formed by information indicating connection relationship set between multiple nodes and indicating cost of the connection relationship; an evaluation value giving part giving to the respective nodes included in the path information an evaluation value indicating cost between the node and a reference node; a determining part determining whether to establish as a path the interval between any two of the nodes, on the basis of the connection relationship and a magnitude relation between the evaluation values given to the nodes; and an evaluation value updating part updating the evaluation value of the respective nodes, on the basis of value indicating cost between the respective nodes and a node connected by the established path. Following the determination made by the determining part, the evaluation value updating part executes an evaluation value updating process repeatedly.
    Type: Application
    Filed: November 20, 2015
    Publication date: June 16, 2016
    Inventor: Hitoshi ISHIKAWA
  • Patent number: 9356280
    Abstract: A lithium ion secondary battery electrode according to the present invention includes (A) a non-fluorinated polymer; (B) an active material; (C) a thickener; and (D) a conductive auxiliary agent. An elution ratio of (A) the non-fluorinated polymer in an electrolytic solution solvent at 60° C. is equal to or less than 1.0 mass %, and a swelling ratio of (A) the non-fluorinated polymer in the electrolytic solution solvent at 60° C. is equal to or more than 10 mass % and equal to or less than 50 mass %.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: May 31, 2016
    Assignee: NEC ENERGY DEVICES, LTD.
    Inventors: Yuka Chikugo, Hitoshi Ishikawa, Yasutaka Kono, Ippei Waki, Koh Ishiguchi
  • Patent number: 9343740
    Abstract: There is provided a lithium ion battery which maintains the flame retardancy of an electrolyte over a long period of time, has high energy density, and has improved charge/discharge cycle characteristics, high temperature storage characteristics, and rate characteristics. The lithium ion battery according to the present exemplary embodiment is a lithium ion battery comprising an electrolyte containing at least an ionic liquid and a lithium salt, a positive electrode, and a negative electrode, wherein the negative electrode includes a negative electrode active material which is a carbon material treated with a surface treatment agent.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: May 17, 2016
    Assignee: NEC Energy Devices, Ltd.
    Inventors: Shinako Kaneko, Hitoshi Ishikawa, Yasutaka Kono, Yoko Hashizume
  • Publication number: 20160111220
    Abstract: The exemplary embodiment has an object to provide a nonaqueous electrolyte solution having a flame retardancy over a long period and having a good capacity maintenance rate. The exemplary embodiment is a nonaqueous electrolyte solution containing a lithium salt, at least one oxo-acid ester derivative of phosphorus selected from compounds represented by a predetermined formula, and at least one disulfonate ester selected from a cyclic disulfonate ester and a linear disulfonate ester represented by the predetermined formulae.
    Type: Application
    Filed: December 22, 2015
    Publication date: April 21, 2016
    Applicant: NEC ENERGY DEVICES, LTD.
    Inventors: Shinako KANEKO, Hitoshi ISHIKAWA, Yoko HASHIZUME, Eiji SUZUKI
  • Patent number: 9312073
    Abstract: The exemplary embodiment has an object to provide a nonaqueous electrolyte solution having a flame retardancy over a long period and having a good capacity maintenance rate. The exemplary embodiment is a nonaqueous electrolyte solution containing a lithium salt, at least one oxo-acid ester derivative of phosphorus selected from compounds represented by a predetermined formula, and at least one disulfonate ester selected from a cyclic disulfonate ester and a linear disulfonate ester represented by the predetermined formulae.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: April 12, 2016
    Assignee: NEC ENERGY DEVICES, LTD.
    Inventors: Shinako Kaneko, Hitoshi Ishikawa, Yoko Hashizume, Eiji Suzuki
  • Publication number: 20160028118
    Abstract: Disclosed is an electrolyte solution for lithium secondary batteries, including a cyclic sulfonic acid ester represented by the general formula (1): wherein, in the general formula (1), R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, halogen or an amino group with the proviso that R1 and R2 do not represent hydrogen atoms at the same time; and R3 represents methylene which may be substituted with fluorine. Batteries using this electrolyte solution are excellent in battery properties and storage characteristics.
    Type: Application
    Filed: February 28, 2014
    Publication date: January 28, 2016
    Applicant: NEC CORPORATION
    Inventors: Ikiko SHIMANUKI, Hitoshi ISHIKAWA, Daisuke KAWASAKI
  • Publication number: 20160013514
    Abstract: The present invention relates to a gel electrolyte comprising a cyclic sulfonic acid ester represented by formula (1). According to the present invention, it is possible to provide a gel electrolyte capable of suppressing the self-discharge of a polymer secondary battery, and a polymer secondary battery using the gel electrolyte. wherein R1 and R2 are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a halogen group or an amino group with the proviso that R1 and R2 are not hydrogen atoms at the same time; R3 represents a linkage group selected from the group consisting of an alkylene group having 1 to 5 carbon atoms, a carbonyl group, a sulfonyl group, a fluoroalkylene group having 1 to 6 carbon atoms, and a divalent group having 2 to 6 carbon atoms in which alkylene units or fluoroalkylene units are bonded through an ether group.
    Type: Application
    Filed: February 28, 2014
    Publication date: January 14, 2016
    Applicants: NEC Corporation, NEC Energy Devices, Ltd.
    Inventors: Noboru Yoshida, Ikiko Shimanuki, Shinako Kaneko, Hitoshi Ishikawa
  • Publication number: 20150349332
    Abstract: The present invention relates to a negative electrode for a lithium ion secondary battery, the negative electrode containing a negative electrode active material containing a first carbon and a second carbon, in which the first carbon is spherical graphite, the second carbon is massive graphite, and the sulfur concentration in the first carbon (Sx) and the sulfur concentration in the second carbon (Sy) are each independently 0 ppm or more and 300 ppm or less.
    Type: Application
    Filed: January 10, 2014
    Publication date: December 3, 2015
    Applicant: NEC Corporation
    Inventors: Takeshi AZAMI, Hitoshi ISHIKAWA
  • Patent number: 9196926
    Abstract: An object of the present invention is to provide a gel electrolyte for a lithium ion secondary battery having flame retardancy over a long period and a good capacity maintenance rate. The gel electrolyte for a lithium ion secondary battery according to the exemplary embodiment contains a lithium salt, a copolymer of at least one first monomer selected from compounds represented by chemical formulae (1) and (2) and a second monomer represented by chemical formula (4), at least one oxo-acid ester derivative of phosphorus selected from compounds represented by chemical formulae (5) to (7), and at least one disulfonate ester selected from a cyclic-chain type disulfonate ester represented by chemical formula (8) and a linear-chain type disulfonate ester represented by chemical formula (9).
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: November 24, 2015
    Assignee: NEC ENERGY DEVICES, LTD.
    Inventors: Shinako Kaneko, Yasutaka Kono, Hitoshi Ishikawa
  • Publication number: 20150318577
    Abstract: The present invention relates to an electrolyte solution for a lithium secondary battery, which contains a sulfonate compound represented by a specific formula and carboxylic anhydride having one or more C?C double bonds, and a lithium secondary battery using the same.
    Type: Application
    Filed: November 28, 2013
    Publication date: November 5, 2015
    Inventors: Shinsaku SAITHO, Hitoshi ISHIKAWA, Kazuhiko INOUE
  • Patent number: 9165392
    Abstract: Provided is an image generating device for generating an image of an object including a plurality of elements connected to one another. The image generating device includes: a calculating section for iteratively calculating a motion of each element of the plurality of elements based on a physical constraint condition of the each element with respect to another connected element; a parent-child information acquiring section for acquiring parent-child information corresponding to a connection between the each element and the another element based on information indicating an element having a predetermined relationship with another object; a correcting section for correcting a position of a child element with respect to a parent element based on the parent-child information and the motion of the each element; and an image generating section for generating information on the image of the object based on the corrected position of the each element.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: October 20, 2015
    Assignees: SONY COPORATION, SONY COMPUTER ENTERTAINMENT INC.
    Inventors: Hiroshi Matsuike, Junichi Hosono, Tomohito Ito, Hitoshi Ishikawa
  • Patent number: 9111391
    Abstract: An image generating device includes: a gravity parameter changing section for changing a parameter relating to gravity of each of a plurality of rigid bodies which are constrained to one another and included in a first object based on a positional relationship between each of the plurality of rigid bodies and a second object; a physical calculation section for physically calculating a motion of each of the plurality of rigid bodies included in the first object based on the changed parameter; and an image rendering section for rendering an image representing a surface of the first object based on the motions of the plurality of rigid bodies included in the first object.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: August 18, 2015
    Assignees: SONY CORPORATION, SONY COMPUTER ENTERTAINMENT INC.
    Inventors: Fumito Ueda, Hitoshi Ishikawa, Rui Guerreiro, Atsuhiko Terada, Chihiro Kanno, Toshihiro Kamei
  • Publication number: 20150169803
    Abstract: A simulation apparatus which simulates a position of each of a plurality of objects, which move in a virtual space together with time, at each of a plural calculation time is disclosed. The apparatus includes: an object connection block for applying, to each object of each three or more objects contacting with each other at each of the plural calculation time points, a pointer value indicative of a contact destination object with which the object is in contact determining one of the three or more objects as a terminal end to connect the objects; and a pointer value updating block for repeating a pointer value updating process, by which the pointer value of each object is updated to the pointer value of the contact destination object indicated by the pointer value until the pointer values of all of the objects come to indicate the object of the terminal end.
    Type: Application
    Filed: December 9, 2014
    Publication date: June 18, 2015
    Inventors: Hitoshi Ishikawa, Hiroshi Matsuike, Koichi Yoshida
  • Publication number: 20150169804
    Abstract: Disclosed herein is a simulation apparatus which simulates a position of each of plural objects, which move in a virtual space together with time, at each of plural time points of calculation. The apparatus includes: an object pair information acquisition unit acquiring plural pieces of information of object pairs each including, as components thereof, two objects which contact with each other at each of the plural time points of calculation; an allocation unit allocating, at each of the plural time points of calculation, each of the plural object pairs to one of plural groups such that two or more object pairs which include a common object do not belong to the same group; and a calculation unit calculating, at each of the plural time points of calculation, an influence of contact of two objects included in each of the plural object pairs upon positions of the two objects.
    Type: Application
    Filed: December 9, 2014
    Publication date: June 18, 2015
    Inventors: Hitoshi Ishikawa, Hiroshi Matsuike, Koichi Yoshida
  • Patent number: 9050538
    Abstract: An object placement managing unit (44) controls whether or not to change the position or direction of a first object according to a positional relationship between a passive area determined based on the position of the first object, and a judging area determined based on the position of a second object. The object placement managing unit (44) controls whether or not to change the position or direction of the second object according to a positional relationship between an active area determined based on the position of the first object and differing from the passive area, and the judging area.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: June 9, 2015
    Assignees: Sony Corporation, Sony Corporation Entertainment Inc.
    Inventors: Hajime Sugiyama, Hitoshi Ishikawa, Chihiro Kanno, Tomohisa Kano
  • Publication number: 20150155597
    Abstract: The present invention relates to a non-aqueous electrolyte comprising a non-aqueous electrolyte solvent, a supporting salt, and a sulfonate represented by a predetermined formula, the non-aqueous electrolyte having a sulfonate concentration of 0.001 wt % or more and less than 0.2 wt % based on the total mass of the non-aqueous electrolyte.
    Type: Application
    Filed: June 26, 2013
    Publication date: June 4, 2015
    Applicant: NEC Corporation
    Inventors: Hitoshi Ishikawa, Akinobu Nakamura, Koji Utsugi
  • Publication number: 20140248534
    Abstract: A lithium ion secondary battery electrode according to the present invention includes (A) a non-fluorinated polymer; (B) an active material; (C) a thickener; and (D) a conductive auxiliary agent. An elution ratio of (A) the non-fluorinated polymer in an electrolytic solution solvent at 60° C. is equal to or less than 1.0 mass %, and a swelling ratio of (A) the non-fluorinated polymer in the electrolytic solution solvent at 60° C. is equal to or more than 10 mass % and equal to or less than 50 mass %.
    Type: Application
    Filed: November 8, 2012
    Publication date: September 4, 2014
    Applicant: NEC ENERGY DEVICES, LTD.
    Inventors: Yuka Chikugo, Hitoshi Ishikawa, Yasutaka Kono, Ippei Waki, Koh Ishiguchi
  • Patent number: 8624896
    Abstract: An information processing apparatus including: a plurality of data processing functional blocks each used for carrying out individual data processing; a flow control section configured to execute control of data flows among the data processing functional blocks; and a control section configured to carry out a setting process to set the data processing functional blocks and the flow control section. The control section acquires configuration information in accordance with a task list for data processing to be carried out; carries out the setting process to set the data processing functional blocks and the flow control section on the basis of the acquired configuration information; and constructs a data processing configuration adapted to various kinds of data processing to be carried out.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: January 7, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Sakamoto, Masaharu Yoshimori, Tanio Nagasaki, Shinsuke Koyama, Kazumasa Ito, Minoru Takahata, Mikako Hatakenaka, Jin Satoh, Hideshi Yamada, Kenichiro Yokota, Hideki Takeuchi, Hitoshi Ishikawa
  • Publication number: 20130295465
    Abstract: There is provided a lithium ion battery having high flame retardancy and good cycle characteristics on a long-term basis.
    Type: Application
    Filed: March 2, 2012
    Publication date: November 7, 2013
    Applicant: NEC ENERGY DEVICES, LTD.
    Inventors: Shinako Kaneko, Hitoshi Ishikawa