Patents Assigned to JM Energy Corporation
  • Patent number: 10256049
    Abstract: A positive electrode for a lithium ion capacitor includes a positive electrode layer which, after a pretreatment for measurement, has a volume of pores having pore size of not lower than 1.0 nm and lower than 1.4 nm of not lower than 0.11 cc/g, calculated by an HK method, and total pore volume calculated by a BET method of not more than 1.1 cc/g. In the pretreatment: the positive electrode is taken out of a cell of cell voltage of 3 V, cut out and immersed in 10 cc of dehydrated acetonitrile per 1 cm3 of the positive electrode at 25° C. for 10 minutes with stirring. This immersion is repeated three times, and the positive electrode is in a pre-drying at 60° C. for 1 hour. The positive electrode layer is then scraped off from the positive electrode and dried for 2 hours at 200° C. and pressure reduced to 5.5 Pa.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: April 9, 2019
    Assignee: JM ENERGY CORPORATION
    Inventors: Norihiro Yamamoto, Kenji Kojima
  • Patent number: 10081547
    Abstract: The present invention relates to an electrode material, an electrode, an electrical storage device and a lithium-ion capacitor, and the electrode material includes a carbon material and reduces its weight at a temperature not more than 650° C. by 20% relative to the weight thereof before heating when thermogravimetric analysis is performed on the electrode material with a heating rate of 5° C./min in an air flow at a rate of 100 ml/min.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: September 25, 2018
    Assignees: JSR CORPORATION, JM ENERGY CORPORATION
    Inventors: Kang Ko Chung, Ryo Tanaka, Takahiro Shimizu, Kouji Senoo, Satoshi Shimobaba, Yukio Hosaka, Fujio Sakurai, Masahiro Yamamoto, Kenji Kojima
  • Patent number: 9672993
    Abstract: An electrical storage device includes a casing that has an opening, an electrode assembly that is placed inside the casing, a terminal plate that is electrically connected to the electrode assembly, and a holder that is provided to surround the terminal plate, the terminal plate having a step or a slope in an area in which the terminal plate comes in contact with the holder.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: June 6, 2017
    Assignee: JM ENERGY CORPORATION
    Inventors: Kenji Nansaka, Takashi Chiba
  • Patent number: 9576746
    Abstract: An energy storage module in which a plurality of energy storage cells including electrode terminals are stacked, includes a bus bar that electrically connects a plurality of electrode terminals, a conductive member that is secured on the bus bar, a detection section that detects a voltage of each of the energy storage cells, and a wiring board, a wire that is electrically connected to the detection section, and a pad that is connected to the wire being formed on the wiring board, the conductive member coming in contact with the pad.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: February 21, 2017
    Assignee: JM Energy Corporation
    Inventors: Naoki Ueno, Kazuhiro Ohhashi, Tomohiro Ohshima, Kenji Nansaka
  • Publication number: 20170040122
    Abstract: A positive electrode for a lithium ion capacitor includes a positive electrode layer which, after a pretreatment for measurement, has a volume of pores having pore size of not lower than 1.0 nm and lower than 1.4 nm of not lower than 0.11 cc/g, calculated by an HK method, and total pore volume calculated by a BET method of not more than 1.1 cc/g. In the pretreatment: the positive electrode is taken out of a cell of cell voltage of 3 V, cut out and immersed in 10 cc of dehydrated acetonitrile per 1 cm3 of the positive electrode at 25° C. for 10 minutes with stirring. This immersion is repeated three times, and the positive electrode is in a pre-drying at 60° C. for 1 hour. The positive electrode layer is then scraped off from the positive electrode and dried for 2 hours at 200° C. and pressure reduced to 5.5 Pa.
    Type: Application
    Filed: March 30, 2015
    Publication date: February 9, 2017
    Applicant: JM Energy Corporation
    Inventors: Norihiro YAMAMOTO, Kenji KOJIMA
  • Patent number: 9496584
    Abstract: A wound-type accumulator is equipped with a cylindrical wound electrode unit, which has belt-like positive electrode and negative electrode and configured by winding an electrode stack obtained by stacking the positive electrode and negative electrode through a separator from one end thereof, and an electrolytic solution. The negative electrode and/or the positive electrode is doped with lithium ions by electrochemical contact of the negative electrode and/or the positive electrode with a lithium ion source, intra-positive electrode spaces are formed in the positive electrode, and at least one lithium ion source is provided in the intra-positive electrode space or at a position opposing to the intra-positive electrode space in the negative electrode in a state coming into no contact with the positive electrode.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: November 15, 2016
    Assignee: JM Energy Corporation
    Inventors: Makoto Taguchi, Yuu Watanabe, Nobuo Ando, Naoshi Yasuda, Chisato Marumo
  • Patent number: 9496541
    Abstract: An accumulator device includes: an outer container with mutually overlapped outer films bonded air-tightly to each other at a bonding portion formed along respective outer peripheral edge portions; an electrode unit accommodated inside the outer container and including positive and negative electrode sheets stacked one on another with a separator disposed therebetween, the positive and negative electrode sheets each including a current collector on which an electrode layer is formed; positive and negative electrode terminals provided to protrude from inside the outer container to outside through the bonding portion; and an electrolytic solution injected in the outer container. The positive electrode terminal includes an aluminum terminal substrate and a nickel-plating coating formed on a surface of an outer end portion of the terminal substrate located outside the outer container; an inner edge of the nickel-plating coating is located within the bonding portion.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: November 15, 2016
    Assignee: JM Energy Corporation
    Inventors: Makoto Taguchi, Yuu Watanabe, Nobuo Ando, Hidenori Takagi
  • Publication number: 20160247637
    Abstract: An electrical storage device includes a casing that has an opening, an electrode assembly that is placed inside the casing, a terminal plate that is electrically connected to the electrode assembly, and a holder that is provided to surround the terminal plate, the terminal plate having a step or a slope in an area in which the terminal plate comes in contact with the holder.
    Type: Application
    Filed: November 11, 2013
    Publication date: August 25, 2016
    Applicant: JM ENERGY CORPORATION
    Inventors: Kenji NANSAKA, Takashi CHIBA
  • Patent number: 9424996
    Abstract: The electrode active material includes a carbon material having a volume of macropores with 50 to 400 nm pore diameters of 0.05 to 0.40 cc/g. The carbon material may be a composite carbon material that contains a carbon material forming a core, and a coating carbon material covering at least part of the core-forming carbon material.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: August 23, 2016
    Assignees: JSR CORPORATION, JM ENERGY CORPORATION
    Inventors: Toshihiro Hayashi, Tomohiro Utaka
  • Patent number: 9324502
    Abstract: Provided is a lithium ion capacitor that can maintain a high capacity retention rate and suppress an increase in internal resistance even after high-load charging-discharging is repeated many times and that has long service life because the occurrence of a short circuit due to precipitation of lithium on the negative electrode is prevented. The lithium ion capacitor comprises a positive electrode, a negative electrode, and an electrolyte solution, the negative electrode including a current collector and electrode layers that contain a negative electrode active material and are formed on front and back surfaces of the current collector, wherein, in the negative electrode, ratios of deviations of respective thicknesses of the electrode layers formed on the front and back surfaces of the current collector from an average of the thicknesses of the electrode layers to the average is ?10 to 10%.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: April 26, 2016
    Assignee: JM Energy Corporation
    Inventors: Naoshi Yasuda, Takashi Chiba, Kazuyoshi Okada, Kuniyasu Hiraiwa
  • Patent number: 9287058
    Abstract: An accumulator device which provides a high energy density and high output power is provided. The accumulator device (D) includes a positive electrode in which a positive electrode layer (A) is formed, a negative electrode in which a negative electrode layer (B) is formed, and an electrolytic solution (C). The accumulator device is characterized by satisfying that 1.02?WA/WB?2.08 and that 390 ?m?TA?750 ?m, where WA is the weight of the positive electrode layer (A), WB is the weight of the negative electrode layer (B), and TA is the thickness of the positive electrode in which the positive electrode layer (A) is formed.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: March 15, 2016
    Assignee: JM Energy Corporation
    Inventors: Nobuo Ando, Teruaki Tezuka, Yuu Watanabe, Makoto Taguchi, Kenji Kojima, Takashi Chiba, Hirobumi Suzuki
  • Publication number: 20160060125
    Abstract: The present invention relates to an electrode material, an electrode, an electrical storage device and a lithium-ion capacitor, and the electrode material includes a carbon material and reduces its weight at a temperature not more than 650° C. by 20% relative to the weight thereof before heating when thermogravimetric analysis is performed on the electrode material with a heating rate of 5° C./min in an air flow at a rate of 100 ml/min.
    Type: Application
    Filed: August 18, 2015
    Publication date: March 3, 2016
    Applicants: JSR CORPORATION, JM ENERGY CORPORATION
    Inventors: Kang Ko CHUNG, Ryo TANAKA, Takahiro SHIMIZU, Kouji SENOO, Satoshi SHIMOBABA, Yukio HOSAKA, Fujio SAKURAI, Masahiro YAMAMOTO, Kenji KOJIMA
  • Publication number: 20160006034
    Abstract: The present invention relates to an electrode active material, an electrode and an electrical storage device. The electrode active material includes a carbon material and has not less than 0.020 mmol/g of basic functional groups.
    Type: Application
    Filed: March 19, 2014
    Publication date: January 7, 2016
    Applicants: JSR CORPORATION, JM ENERGY CORPORATION
    Inventors: Ryo TANAKA, Takahiro SHIMIZU, Tomohiro UTAKA
  • Patent number: 9208958
    Abstract: Provided is a lithium ion capacitor having a low internal resistance, a high energy density, and a high capacity retention rate. The lithium ion capacitor includes a positive electrode having a positive electrode active material layer formed on a roughened positive electrode current collector, a negative electrode having a negative electrode active material layer containing graphite-based particles formed on a negative electrode current collector, and an electrolytic solution containing a solution of a lithium salt in an aprotic organic solvent, wherein the total thickness of the positive electrode active material layer is 50 ?m to 140 ?m, and the ratio of mass of the positive electrode active material layer to the sum of the mass of the positive electrode active material layer and that of the negative electrode active material layer is 0.4 to 0.5.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: December 8, 2015
    Assignee: JM Energy Corporation
    Inventors: Teruaki Tezuka, Toshihiro Hayashi, Nobuo Ando, Yuu Watanabe, Makoto Taguchi, Naoshi Yasuda
  • Patent number: 9202637
    Abstract: The present invention has as its object the provision of a lithium ion capacitor having high capacity and high output characteristics and also having high safety that allows suppression of an increase in surface temperature even when an internal short circuit accidentally occurs. The lithium ion capacitor of the present invention comprises: a lithium ion capacitor element formed by overlaying a positive electrode sheet and a negative electrode sheet on top of one another with a separator interposed therebetween; an electrolyte solution; and an outer container that contains the lithium ion capacitor element and the electrolyte solution, a porous layer is formed on an outer surface of the lithium ion capacitor element, and the lithium ion capacitor satisfies following relational expressions (1) and (2): 35?T×R/C??relational expression (1): 0.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: December 1, 2015
    Assignee: JM Energy Corporation
    Inventors: Kenji Nansaka, Makoto Taguchi
  • Publication number: 20150325885
    Abstract: A method for producing an electrical storage device includes winding a positive electrode, a negative electrode, and a lithium ion source to form a wound element that has a flat part and a curved part, the lithium ion source including a plurality of parts that are arranged in a winding direction through a gap, the wound element being formed so that the gap is situated in the curved part.
    Type: Application
    Filed: December 2, 2013
    Publication date: November 12, 2015
    Applicant: JM ENERGY CORPORATION
    Inventors: Kenji NANSAKA, Takashi CHIBA
  • Patent number: 9093228
    Abstract: A method of producing an electric storage device includes a fastening that includes fastening a laminate that includes a lithium foil and a metal foil to at least one of a first separator and a second separator using a bonding member, and a winding that includes winding the first separator, the second separator, the laminate, a cathode, and an anode to obtain a wound element, one of the first separator and the second separator being disposed between the cathode and the anode.
    Type: Grant
    Filed: December 24, 2010
    Date of Patent: July 28, 2015
    Assignee: JM Energy Corporation
    Inventors: Motoki Mizukami, Kenji Nansaka, Nobuo Ando
  • Patent number: 9030804
    Abstract: Disclosed is an accumulator device that can prevent aluminum forming an outer container from forming an alloy with lithium even when fine lithium metal powder is isolated from a lithium ion supply source to adhere to the outer container. The accumulator device has an outer container at least a part of which is formed of aluminum or an aluminum alloy, a positive electrode and a negative electrode that are arranged in the outer container, and an electrolytic solution injected into the outer container and containing a lithium salt, wherein the negative electrode and/or the positive electrode is doped with a lithium ion by electrochemical contact of a lithium ion supply source arranged in the outer container with the negative electrode and/or the positive electrode, and the portion formed of aluminum or the aluminum alloy in the outer container is set to a positive potential.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: May 12, 2015
    Assignee: JM Energy Corporation
    Inventors: Kenji Nansaka, Nobuo Ando
  • Publication number: 20140120392
    Abstract: An energy storage module in which a plurality of energy storage cells including electrode terminals are stacked, includes a bus bar that electrically connects a plurality of electrode terminals, a conductive member that is secured on the bus bar, a detection section that detects a voltage of each of the energy storage cells, and a wiring board, a wire that is electrically connected to the detection section, and a pad that is connected to the wire being formed on the wiring board, the conductive member coming in contact with the pad.
    Type: Application
    Filed: April 12, 2012
    Publication date: May 1, 2014
    Applicant: JM Energy Corporation
    Inventors: Naoki Ueno, Kazuhiro Ohhashi, Tomohiro Ohshima, Kenji Nansaka
  • Patent number: D758328
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: June 7, 2016
    Assignee: JM Energy Corporation
    Inventor: Kenji Nansaka