Patents Assigned to FDK Corporation
  • Publication number: 20180047966
    Abstract: A series-coupling component for a battery pack includes a circular plate-shaped bulkhead portion, a cylinder portion taking the bulkhead portion as a top surface and opening downward, an upper end side of the unit battery being inserted into the cylinder portion, and a wall surface portion erected upwardly along a peripheral edge of the bulkhead portion to hold a lower end side of the unit battery, separated by a cutout portion from an upper end of a cylindrical side surface up to a top surface of the bulkhead portion at a part of the cylindrical side surface that opens at the upper side taking the bulkhead portion as a bottom, the bulkhead portion has a hole that communicates in an up and down direction and a groove that has a rectangular cross-section on a top surface and opens at peripheral edges of the hole and the bulkhead portion.
    Type: Application
    Filed: February 23, 2016
    Publication date: February 15, 2018
    Applicant: FDK CORPORATION
    Inventors: Makoto Sakaguchi, Takashi Hirabayashi
  • Patent number: 9819017
    Abstract: There is provided a sealed battery having excellent corrosion resistance and sealing performance. The sealed battery 1 includes a battery jacket can 2 having a bottom and being in a cylindrical or polyhedral shape. The battery jacket can 2 also serves as a collector of one of the electrodes. The battery jacket can 2 has an opening pointing upwards and accommodates active parts (3, 4, 5 and 20). The opening is sealed by a sealing part 10 that includes a flat metal sealing plate 6, a gasket 9 made of an insulator, and a terminal part 7 of the other electrode. In the sealing part, the terminal part is attached to the sealing plate 6 using the gasket 9. The sealing plate has a planar shape that matches a shape of the opening of the battery jacket can. The sealing plate is in a saucer shape whose edge section is bent upwards.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: November 14, 2017
    Assignee: FDK Corporation
    Inventors: Satoshi Sunada, Takahide Kobashi, Yoshie Fujita, Nobuhiro Nishiguchi
  • Patent number: 9748610
    Abstract: A spirally-wound lithium battery includes: a bottomed cylindrical cell can doubling as an anode current collector; and a strip-shaped electrode body including an anode and a cathode arranged faced each other via a separator, the anode including an anode active material of lithium metal or alloy, the cell can being sealed, with a non-aqueous organic electrolyte, containing the electrode body wound in a longitudinal direction, the electrode body being wound from a winding axis side around the axis in a vertical direction, an extending direction of a cell can cylindrical axis, such that the anode is arranged at an outermost circumference, the electrode body is attached with a conductor, continuously extending in the longitudinal direction thereof, on an outer circumferential surface of the anode, from a winding end of the anode to an area thereof opposed to an inner surface of the cathode on its winding end side.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: August 29, 2017
    Assignee: FDK Corporation
    Inventors: Yoshie Fujita, Nobuhiro Nishiguchi, Satoshi Sunada, Takahide Kobashi
  • Patent number: 9728764
    Abstract: The present invention provides a heat suppressing alkaline storage battery including a positive electrode lead having a downsized portion that incorporates a PTC thermistor. A battery includes a positive electrode lead having a first lead half body, a second lead half body, and a PTC thermistor, the first and second lead half bodies overlap end portions formed in a portion where the first and second lead half bodies overlap with each other, the overlap end portions being larger than the PTC thermistor as viewed from a plane and being in contact with the PTC thermistor, the PTC thermistor is fitted in a fitting recessed portion formed in the overlap end portion of the first lead half body, and an exposed portion of the PTC thermistor is covered with a protective material.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: August 8, 2017
    Assignees: FDK CORPORATION, LITTELFUSE JAPAN G.K.
    Inventors: Tatsuya Nagai, Koji Izumi
  • Patent number: 9711788
    Abstract: A primary lithium battery having an electrode body that is arranged with a sheet-like cathode and a sheet-like anode opposing each other via a separator and sealed inside a jacket body together with a non-aqueous organic electrolyte including the cathode being made by applying or compressively bonding to a surface of a sheet-like current collector cathode material including cathode active material allowing occlusion of lithium ions, and the anode being made by applying anode material including carbon active material allowing occlusion and separation of lithium ions on a one main side face side of a sheet-like current collector having formed holes penetrating from a front to a back, and an anode active material made of a lithium metal or a lithium alloy being affixed to another face side of the current collector.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: July 18, 2017
    Assignee: FDK Corporation
    Inventors: Naoaki Nishimura, Yuki Ochiai, Haruhiko Satake, Nobuhiro Nishiguchi
  • Publication number: 20170168101
    Abstract: An electric field intensity calculation apparatus specifies, by analyzing a measurement result for a near magnetic field intensity distribution on a component side of a printed circuit, a maximum intensity of an evaluation target frequency component of a near magnetic field of the printed circuit and an area of a range, on the printed circuit, delimited by using, as its boundary, positions where intensity of the evaluation target frequency component of the near magnetic field attenuates by a predetermined factor relative to the maximum intensity, and calculate a far electric field intensity for the evaluation target frequency at a place at a distance from the printed circuit, based on the area, an electronic current value of an electronic current that generates a near magnetic field having the maximum intensity when flowing through the component side of the printed circuit, the evaluation target frequency, the distance, and a proportional coefficient.
    Type: Application
    Filed: July 23, 2015
    Publication date: June 15, 2017
    Applicants: FUJITSU TEN LIMITED, FDK CORPORATION
    Inventors: Jun INAMI, Katsuji HIRABAYASHI, Manabu TERANISHI
  • Patent number: 9672972
    Abstract: A winding component includes a core that surrounds an outer circumference of a coil and end surfaces of flanges to form a closed magnetic circuit, in which notches through which end portions of the coil are drawn outward are so formed in the flanges that each of the notches extends radially inward from an outer circumferential edge of the corresponding flange, a wall that surrounds each of the notches such that the wall stands axially outward on the flange, a thick portion in a winding part in correspondence with the notches and thicker than other portions of the winding part, and a lid formed of a sidewall between an outer circumferential surface of the wall and the core and covers the outer circumferential surface of the wall and a top plate at an axially outer end of the sidewall and covers an opening in the wall.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: June 6, 2017
    Assignee: FDK Corporation
    Inventors: Takashi Takiguchi, Masami Miyamoto
  • Patent number: 9653203
    Abstract: A multilayer inductor providing improved DC superposition characteristics by a permanent magnet that emits a bias magnetic flux, and having a low-loss material as a magnetic body to improve converter conversion efficiency. The multilayer inductor has a plurality of laminated electrically insulating magnetic layers; and laminated conductive patterns, each of the conductive patterns being connected in sequence in the lamination direction forming a spiral coil inside the magnetic layer. An magnetized annular permanent magnet layer emits a magnetic flux whose direction is opposite that of a magnetic flux excited by the coil is between an outer peripheral edge of the inductor and an outer peripheral edge of the coil so as not to overlap an inner peripheral part of the magnet layer with the conductive patterns and so as to block a space between the conductive patterns and the magnet layer, in axial view of the coil.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: May 16, 2017
    Assignee: FDK CORPORATION
    Inventors: Kiyohisa Yamauchi, Daisuke Matsubayashi, Juji Kato, Mikio Kitaoka, Shigenori Suzuki
  • Patent number: 9640307
    Abstract: A transformer in which the high-voltage and low-voltage coils are easily laminated when they are alternately laminated in their axial directions, improving power efficiency. The transformer includes: a high-voltage coil including a wire wound around a cylindrical winding drum of a bobbin which is provided with flanges on both ends of the winding drum; a low-voltage coil formed of a flat plate member having an open ring shape, the low-voltage and high-voltage coils being alternately laminated in their axial directions; and a cover member which has a ring plate shape and is coaxially laminated on an outside of a laminate in an axial direction. The low-voltage coil is between the high-voltage coil and the cover member, and a wall portion protruding in the axial direction from the bobbin of the high-voltage coil and a wall portion protruding in the axial direction of the cover member are alternately disposed.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: May 2, 2017
    Assignee: FDK CORPORATION
    Inventors: Masami Miyamoto, Yutaka Ikeda, Akihiro Fujii
  • Patent number: 9590168
    Abstract: An alkali niobate-based piezoelectric material having the general formula {(K1-aNaa)1-bLib}(Nb1-c-dTacSbd)O3+x mol % BanTiO3+y mol % CuO, where 0?a?0.9, 0?b?0.3, 0<c?0.5, 0?d?0.1, 0.5?x<10.0, 0.1?y?8.0, and 0.9?n?1.2.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: March 7, 2017
    Assignee: FDK Corporation
    Inventors: Ryosuke Kobayashi, Akihiro Mitani, Yoshinari Oba
  • Publication number: 20160359353
    Abstract: A charger includes: a charging circuit which receives an electric power from external equipment and charges a secondary battery; a control device which determines a power supply capability of the external equipment on the basis of the electric power that is supplied to the charging circuit from the external equipment; and a display device that displays the power supply capability of the external equipment, which has been determined by the control device.
    Type: Application
    Filed: May 26, 2016
    Publication date: December 8, 2016
    Applicant: FDK CORPORATION
    Inventors: Kunihisa Sekiguchi, Yasunari Mizoguchi, Hirohito Teraoka, Hiroshi Suzuki, Katsuki Tsuchiya, Kevin Foster, Jinfeng Jia
  • Patent number: 9490661
    Abstract: An uninterruptible power supply is having a battery, a power inverter circuit for inverting the electrical power of the battery, and a voltage control circuit. The voltage control circuit controls the power inverter circuit, so that the output voltage of the power inverter circuit is maintained at a standby voltage lower than a rated voltage under the condition of a power failure detection signal being not output from an external power supply and the output voltage of the power inverter circuit equals the rated voltage under the condition of the power failure detection signal being output from the external power supply.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: November 8, 2016
    Assignee: FDK CORPORATION
    Inventors: Takashi Kabasawa, Jinichi Sakamoto
  • Patent number: 9490713
    Abstract: A DC/DC converter 10 of the present invention is provided with a constant-voltage power supply circuit 11; a SENSE+ terminal; a SENSE?/OCPSEL terminal pulled up to a predetermined voltage VL through a pull-up resistor R8; and a controller 14 for controlling the constant-voltage power supply circuit 11, wherein the controller 14 controls the output voltage Vout of the constant-voltage power supply circuit 11 on the basis of a potential difference between the SENSE+ terminal and the SENSE?/OCPSEL terminal, on the condition that the voltage of the SENSE?/OCPSEL terminal is lower than a threshold voltage, and sets predetermined control parameters on the basis of the voltage of the SENSE?/OCPSEL terminal, on the condition that the voltage of the SENSE?/OCPSEL terminal is equal to or higher than the threshold voltage.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: November 8, 2016
    Assignee: FDK CORPORATION
    Inventors: Eiji Nagashima, Toshio Shibata
  • Patent number: 9484585
    Abstract: There is provided non-aqueous organic electrolytic solution for a lithium primary battery which can be stored for long period at elevated temperatures or at the end stage of discharge. Non-aqueous organic electrolytic solution 20 for lithium primary battery 1 having a cathode active material which is manganese dioxide and an anode active material which is either of lithium or lithium alloy includes a base electrolytic solution that is composed of organic solvent and supporting electrolyte and to which either one of hydroxyphthalimide or hydroxyphthalimide derivative is added as an additive. An amount of the additive which is added to the base electrolytic solution is 0.1 wt % or more and 5.0 wt % or less. It is more preferable that the amount of the additive which is added to the base electrolytic solution is 0.1 wt % or more and 1.0 wt % or less.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: November 1, 2016
    Assignees: FDK Corporation, FDK Tottori Co., Ltd.
    Inventors: Yoshie Fujita, Satoru Naruse, Satoshi Sunada, Naoaki Nishimura, Takahide Kobashi
  • Publication number: 20160285285
    Abstract: A charger of the present invention includes a charging circuit that allows a secondary battery to be charged, a state-of-charge detection circuit that detects a state of charge of the secondary battery, a pictogram display unit that displays the state of charge of the secondary battery, and a control device that controls the charging circuit and the pictogram display unit on the basis of the state of charge of the secondary battery. The control device determines a kind of electronic apparatus available by the secondary battery in accordance with the state of charge of the secondary battery, and then displays the kind of electronic apparatus available on the pictogram display unit.
    Type: Application
    Filed: March 23, 2016
    Publication date: September 29, 2016
    Applicant: FDK CORPORATION
    Inventors: Yasunari Mizoguchi, Hirohito Teraoka, Kunihisa Sekiguchi, Katsuki Tsuchiya, Kevin Foster
  • Publication number: 20160284464
    Abstract: An electronic module is provided with a circuit board including a central-axis insertion hole and composed by laminating a multitude of wiring layers; and a core formed of a magnetic material and inserted through the central-axis insertion hole, wherein the circuit board includes a plurality of coil wiring patterns formed in positions of the respective wiring layers surrounding the core insertion hole; and edge-face through-holes formed on inner wall surfaces of the central-axis core insertion hole to electrically connect the plurality of coil wiring patterns to form a coil, the central-axis insertion hole has a octagon shape in plan view, concave portions are disposed on the inner wall surfaces corresponding to sides of the octagon shape, and the edge-face through-holes are formed in the concave portions.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 29, 2016
    Applicant: FDK CORPORATION
    Inventors: Yohei Fujii, Makoto Okamoto, Masayoshi Kimura, Toshimasa Sugihara
  • Publication number: 20160276849
    Abstract: In a balance correction circuit including a plurality of converter type balance correction units that control a supply of a current to a plurality of power storage cells by complementarily on/off controlling two switching elements and hereby allowing to exchange power between or among power storage cells via an inductor to equalize the voltages of the power storage cells, a common timing signal used to generate a control signal of a switching element is supplied to each of the above balance correction units. For example, the balance correction circuit generates a timing signal to supply to a first balance correction unit based on a variation in a voltage applied to the capacitive element charged by a voltage difference created between a control signal generated by the second balance correction unit and a second power storage cell cathode of the balance correction unit.
    Type: Application
    Filed: October 16, 2014
    Publication date: September 22, 2016
    Applicant: FDK CORPORATION
    Inventor: Kenji HAMADA
  • Publication number: 20160276670
    Abstract: Slurry is prepared by dispersing a solvent containing fibrous carbon (carbon nanotube, vapor grown carbon fiber (VGCF (registered trademark))) by using a media-type disperser, and the slurry to be applied to a collector is obtained by kneading the prepared slurry and an electrode active material. As a media-type disperser, for example, a ball mill disperser or a bead mill disperser is used. The dispersion using the media-type disperser is performed for 5 to 10 hours. As a dispersant, for example, at least any one of a nonionic dispersant, an ethylenic dispersant, a polymeric dispersant and an amine dispersant is used. The dispersion is performed so that a fiber length of the fibrous carbon becomes 2 to 7 ?m.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 22, 2016
    Applicant: FDK CORPORATION
    Inventors: Yuki OCHIAI, Keita YAMAMOTO
  • Patent number: 9438066
    Abstract: A contactless rechargeable alkaline secondary battery includes an alkaline secondary battery; a power receiver circuit having receiver coils and a resonance capacitor and adapted to receive AC power via magnetic field resonance, the resonance capacitor connected with the receiver coils L1 to L4; a rectifier circuit adapted to rectify the AC power; a current limiter circuit adapted to limit a charging current flowing from the rectifier circuit to the alkaline secondary battery; and an outer casing configured to be cylindrical in shape, adapted to house the alkaline secondary battery, and provided with a positive terminal and a negative terminal, the positive terminal being connected with a positive pole of the alkaline secondary battery and the negative terminal being connected with a negative pole of the alkaline secondary battery, wherein the power receiver coils are shaped like a sheet of an electric wire wound along a plane.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: September 6, 2016
    Assignee: FDK CORPORATION
    Inventors: Tetsuya Suzuki, Hidetaka Yoshihashi, Hirohito Teraoka, Yutaka Toga, Katsuki Tsuchiya
  • Publication number: 20160226063
    Abstract: A primary lithium battery having an electrode body that is arranged with a sheet-like cathode and a sheet-like anode opposing each other via a separator and sealed inside a jacket body together with a non-aqueous organic electrolyte including the cathode being made by applying or compressively bonding to a surface of a sheet-like current collector cathode material including cathode active material allowing occlusion of lithium ions, and the anode being made by applying anode material including carbon active material allowing occlusion and separation of lithium ions on a one main side face side of a sheet-like current collector having formed holes penetrating from a front to a back, and an anode active material made of a lithium metal or a lithium alloy being affixed to another face side of the current collector.
    Type: Application
    Filed: September 25, 2014
    Publication date: August 4, 2016
    Applicants: FDK CORPORATION, FDK TOTTORI CO., LTD.
    Inventors: Naoaki NISHIMURA, Yuki OCHIAI, Haruhiko SATAKE, Nobuhiro NISHIGUCHI