Patents Assigned to FDK Corporation
  • Patent number: 11901761
    Abstract: A charging device includes a rectifier circuit which rectifies AC power output by an AC power supply, a DC-DC converter which converts a voltage of DC power output by the rectifier circuit, a charging circuit which includes a positive electrode contact point in contact with a positive electrode terminal of a mounted secondary battery and a first negative electrode contact point and a second negative electrode contact point in contact with a negative electrode terminal of the secondary battery, an output voltage from the DC-DC converter being applied between the positive electrode contact point and the first negative electrode contact point, and a control circuit which includes a photocoupler that is turned on by a difference in potential between the positive electrode contact point and the second negative electrode contact point and outputs an enable signal for the DC-DC converter when the photocoupler is on.
    Type: Grant
    Filed: August 19, 2021
    Date of Patent: February 13, 2024
    Assignee: FDK CORPORATION
    Inventors: Masatsuru Miyazaki, Norio Fukui
  • Patent number: 11888163
    Abstract: An alkaline battery includes a bottomed tubular battery can made of metal, serving as a positive electrode current collector; a positive electrode mixture sealed in the battery can and formed in a cylindrical shape, the positive electrode mixture containing manganese dioxide as a positive electrode active material and containing a binder including fluorine resin such that a ratio of the binder to the positive electrode active material is 0.2 wt % or more and 0.8 wt % or less; a bottomed tubular separator sealed in the battery can and arranged on an inner peripheral side of the positive electrode mixture; a gel-form negative electrode mixture sealed in the battery can, arranged inside the separator, containing zinc powder as a negative electrode active material; and an electrolyte that includes an alkaline aqueous solution, sealed in the battery can.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: January 30, 2024
    Assignee: FDK CORPORATION
    Inventors: Takuro Manabe, Yuya Suzuki, Toshiaki Nakano
  • Patent number: 11876186
    Abstract: An alkaline storage battery includes a spiral electrode group in which a positive electrode plate, a negative electrode plate, and a separator arranged between the positive electrode plate and the negative electrode plate are laminated, the negative electrode plate is located on the inner peripheral side of the positive electrode plate at an innermost peripheral portion, and an electrically conductive outer packaging can in which the spiral electrode group is accommodated together with an alkaline electrolytic solution. The negative electrode plate includes a negative electrode core body, a first negative electrode mixture layer carried on a surface on the outer peripheral side of the negative electrode core body, and a second negative electrode mixture layer carried on a surface on the inner peripheral side of the negative electrode core body.
    Type: Grant
    Filed: January 26, 2021
    Date of Patent: January 16, 2024
    Assignee: FDK CORPORATION
    Inventor: Akira Saguchi
  • Publication number: 20230369688
    Abstract: A solid-state battery includes a solid-state battery body and a coating film. The solid-state battery body has an electrolyte layer containing a solid electrolyte, a positive electrode layer formed on a part of a first principal plane of the electrolyte layer, and a negative electrode layer formed on a part of a second principal plane of the electrolyte layer opposite to the first principal plane. The coating film has an insulating property and covers the solid-state battery body so as to expose a first portion of the positive electrode layer and a second portion of the negative electrode layer. The coating film has hardness higher than that of solid electrolytes contained in the solid-state battery body.
    Type: Application
    Filed: July 19, 2023
    Publication date: November 16, 2023
    Applicant: FDK CORPORATION
    Inventors: Akihiro MITANI, Satoshi HIGUCHI, Toshiaki NAKANO, Masakazu KOBAYASHI, Minako SUZUKI
  • Patent number: 11817573
    Abstract: A nickel-metal hydride secondary battery includes an outer can and a group of electrodes housed in the outer can together with an alkaline electrolytic solution. The group of electrodes includes a positive electrode and a negative electrode that are superposed with a separator interposed therebetween, and the negative electrode includes a hydrogen absorbing alloy for nickel-metal hydride secondary batteries, the hydrogen absorbing alloy having a single composition and composed of a plurality of crystal phases.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: November 14, 2023
    Assignee: FDK CORPORATION
    Inventors: Shota Ohata, Jun Ishida, Yuki Ehara, Masaru Kihara
  • Patent number: 11817735
    Abstract: A charging device of the present invention includes a DC-DC converter, a charging circuit that charges a secondary battery, a power supply voltage detecting circuit that detects an input voltage Ve, an output voltage setting circuit that sets an output voltage of the DC-DC converter, and a charging control section that controls the charging circuit and the output voltage setting circuit based on the input voltage Ve, and the charging control section increases the output voltage of the DC-DC converter by a predetermined voltage in a stepwise manner while monitoring the input voltage Ve, and in a case where the input voltage Ve is decreased to a first threshold voltage Vth1 or less before the output voltage of the DC-DC converter increases to a rated charging voltage, the charging control section keeps the output voltage of the DC-DC converter at a voltage that is one step lower than a voltage at a time point of the case.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: November 14, 2023
    Assignee: FDK CORPORATION
    Inventors: Tomoki Onaka, Yukio Ono, Norio Fukui
  • Patent number: 11811069
    Abstract: A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air electrode. This catalyst for an air electrode is a catalyst for an air electrode including an oxide containing at least bismuth (Bi), ruthenium (Ru), sodium (Na), and oxygen, and Na/(Ru+Bi+Na) representing an atomic ratio of the sodium to a sum of the bismuth, the ruthenium, and the sodium is 0.126 or more and 0.145 or less.
    Type: Grant
    Filed: April 21, 2022
    Date of Patent: November 7, 2023
    Assignee: FDK CORPORATION
    Inventors: Minori Inoue, Takeshi Kajiwara, Shohei Unoki, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Patent number: 11777333
    Abstract: A voltage adjuster has: a current path connecting one end on an input/output terminal side and the other end on a secondary battery side; a bypass path of the current path; a converter provided in the bypass path and capable of changing input electric power to a predetermined voltage corresponding to the secondary battery or a predetermined voltage corresponding to an external device in accordance with the charge or discharge of the second battery; and a path selector configured to select a path to be used out of the current path or the bypass path in accordance with the charge or discharge of the secondary battery.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: October 3, 2023
    Assignee: FDK CORPORATION
    Inventors: Yosuke Saito, Kiyotaka Kumamoto
  • Publication number: 20230307715
    Abstract: A solid-state battery includes a battery body in which a positive electrode layer, an electrolyte layer, and a negative electrode layer are stacked; and a reference electrode stacked on a surface in the direction which these layers are stacked. The solid-state battery further includes a positive electrode connected to the positive electrode layer and a negative electrode connected to the negative electrode layer. The positive and negative electrodes are provided on the battery body.
    Type: Application
    Filed: May 17, 2023
    Publication date: September 28, 2023
    Applicant: FDK CORPORATION
    Inventors: Masakazu KOBAYASHI, Tomohiro FUJISAWA, Minako SUZUKI, Yuji GOTO
  • Patent number: 11742545
    Abstract: A battery module according to the present invention includes: a case body including a flat plate portion and a base portion projecting from the flat plate portion; a circuit board including a through-hole formed in a thickness direction and secured to the case body, the base portion being inserted into the through-hole; and a battery secured to and placed on the base portion, in which the battery is a flat battery with a coin shape or a button shape, and electrode plates connected to each of the positive and negative poles of the battery are connected to the circuit board to supply a power source to electronic components disposed on the circuit board.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: August 29, 2023
    Assignee: FDK CORPORATION
    Inventors: Yunosuke Fukuda, Naoto Kawaguchi, Yoshiro Saito
  • Patent number: 11742685
    Abstract: This charger 1 is provided with: a battery housing unit 2 including a first contact T1 and a second contact T2 which touch the respective electrode terminals of a battery BAT to be housed therein; a high-potential power supply line 3 and a low-potential power supply line 4 to which power for charging the battery BAT is supplied; a connection switching circuit 5 capable of switching between a first connection state in which the first contact T1 is connected to the high-potential power supply line 3 and the second contact T2 is connected to the low-potential power supply line 4 and a second connection state in which the second contact T2 is connected to the high-potential power supply line 3 and the first contact T1 is connected to the low-potential power supply line 4; and a control device 7 for controlling the connection switching circuit 5 to perform charging control on the battery BAT.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: August 29, 2023
    Assignee: FDK CORPORATION
    Inventors: Takashi Kanou, Kenji Kitamura, Yasunari Mizoguchi, Takeshi Yoshida, Michiko Sato
  • Publication number: 20230216048
    Abstract: This method achieves lithium cobalt pyrophosphate in which the generation of different phases is suppressed. A powder of a lithium compound, a cobalt compound and a phosphorus compound in amounts based on the composition of lithium cobalt pyrophosphate is mixed while adding water at a prescribed temperature (T1), for example, room temperature, and the substance obtained thereby is further mixed at a higher temperature (T2), for example, 40° C.-60° C. In this way, a precursor of lithium cobalt pyrophosphate is formed that has excellent uniformity of distribution of the lithium component, the cobalt component and the phosphorus component. By firing such a precursor, a lithium cobalt pyrophosphate is obtained in which the generation of different phases is suppressed.
    Type: Application
    Filed: May 20, 2021
    Publication date: July 6, 2023
    Applicants: FDK CORPORATION, Kansai Catalyst Co., Ltd.
    Inventors: Juji KATO, Tomohiro FUJISAWA, Yuji GOTO, Kouichi HASHIMOTO
  • Publication number: 20230137964
    Abstract: An electrode body housed, in a cylindrical battery can, in a spirally wound arrangement includes a sheet-like positive electrode, a sheet-like negative electrode, and a first separator laminate and a second separator laminate with one of the positive and negative electrodes therebetween (the negative electrode in the example of FIG. 2). Each of the first separator laminate and the second separator laminate has a layered structure including two or more separators (two in FIG. 2) welded together by a first weld region extending in a longitudinal direction along a first side and a second weld region extending in the longitudinal direction along a second side opposing the first side. The first separator laminate and the second separator laminate are welded together by a third weld region extending in the longitudinal direction along the first side and a fourth weld region extending in the longitudinal direction along the second side.
    Type: Application
    Filed: October 6, 2022
    Publication date: May 4, 2023
    Applicant: FDK CORPORATION
    Inventors: Junki YAMAMOTO, Koichi MOTOIKE, Sho SATO, Daisuke HIRATA, Rei HANAMURA
  • Patent number: 11594740
    Abstract: A resin sealing gasket 10 to be incorporated in an alkaline battery 1 housing a power generation element (3 to 5) in a cylindrical battery can 2 closed at a bottom, the sealing gasket configured to insulate a top opening of the battery can and a negative electrode terminal plate 7 from each other. The sealing gasket includes: an outer periphery part 14 standing upward from the rim of a disc-shaped partition part 13; a boss part 11 in a hollow cylindrical shape enabling a rod-shaped negative electrode current collector 6 to stand at the center of the partition part; and a thin-walled portion 15 formed in a groove shape along the outer periphery of the boss part and being thinner than other portions of the partition part.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: February 28, 2023
    Assignee: FDK CORPORATION
    Inventors: Tatsuya Yamazaki, Shigeyuki Kuniya
  • Patent number: 11509012
    Abstract: A thin-type battery includes: a flat shaped electrode body formed by stacking a positive electrode and a negative electrode while interposing a separator in between; an electrolyte; and an exterior body made from a laminate film, the exterior body enclosing the electrode body and the electrolyte with ends of the exterior body being hermetically sealed by heat-sealing, wherein the exterior body includes a folded part to be folded from one surface side to another surface side of the electrode body and to extend along an edge of the electrode body, and the folded part includes resin-interposed heat-sealing portions located in regions in two ends in a direction along the edge of the electrode body and outside the electrode body, where portions of the exterior body are opposed to each other, each resin-interposed heat-sealing portion being heat-sealed by interposing a piece made from a resin.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: November 22, 2022
    Assignee: FDK CORPORATION
    Inventors: Ayano Uemura, Rei Hanamura
  • Patent number: 11502367
    Abstract: Provided is a battery case for accommodating a coin cell battery which is inserted thereinto in a sliding manner. The battery case includes: a battery case body part which includes an opening for accommodating the coin battery and in which the accommodated coin cell battery is held; and a lid part which closes the opening of the battery case body part. The lid part includes a claw part which, upon closing of the opening, is fitted and inserted into the battery case body part, and with which, upon removal of the coin cell battery held in the battery case body part, the coin battery is pushed out in a direction opposite to a direction of insertion.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: November 15, 2022
    Assignee: FDK CORPORATION
    Inventors: Yunosuke Fukuda, Naoto Kawaguchi, Atsushi Metsugi
  • Patent number: 11495804
    Abstract: An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by Bi2Ru2O6.92 and a crystal structure represented by Bi2Ru2O7.33.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: November 8, 2022
    Assignees: FDK CORPORATION, JAPAN METALS AND CHEMICALS CO., LTD.
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Publication number: 20220344633
    Abstract: A method of manufacturing a solid-state battery includes forming an electrode that includes a first electrode layer and a second electrode layer facing the first electrode layer and that further includes a buried layer interposed between the first electrode layer and the second electrode layer so as to surround a contact portion where these electrode layers contact each other. For the buried layer, a solid electrolyte with lower electron conductivity than an electrode active material is used, for example. The buried layer is provided between the edge portion of the first electrode layer and the edge portion of the second electrode layer, so that deformation of the first electrode layer and second electrode layer is prevented in the subsequent lamination and thermocompression bonding and thus the occurrence of a short circuit due to such deformation is prevented in the solid-state battery.
    Type: Application
    Filed: June 30, 2022
    Publication date: October 27, 2022
    Applicant: FDK CORPORATION
    Inventors: Masakazu KOBAYASHI, Akihiro MITANI, Satoshi HIGUCHI, Minako SUZUKI, Yuji GOTO
  • Publication number: 20220271401
    Abstract: An axial lead extending on a principal surface of a flat tab includes a main body part having a diameter and a connection part. The connection part includes a first part located adjacent to the main body part and a second part located from the first part and the end part. The first part includes a weld part welded to the flat tab and has a first thickness less than the diameter. The second part includes a non-weld part not welded to the flat tab and has a second thickness equal to or less than the first thickness. The second part is formed by pressing the end part of the axial lead, the end part having been raised when resistance welding is performed on the axial lead and the flat tab.
    Type: Application
    Filed: December 14, 2021
    Publication date: August 25, 2022
    Applicant: FDK CORPORATION
    Inventors: Yuya IIDA, Yuki YAMANE, Masao KONDO
  • Patent number: D1012017
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: January 23, 2024
    Assignee: FDK CORPORATION
    Inventors: Takashi Kanou, Mika Takayanagi, Asuka Takahashi, Yasunari Mizoguchi, Katsuki Tsuchiya, Kenji Kitamura, Kunihisa Sekiguchi, Kazuta Takeno