公开(公告)号：US20220271401A1

公开(公告)日：2022-08-25

申请号：US17549991

申请日：2021-12-14

Applicant: FDK CORPORATION

Inventor： Yuya IIDA ,  Yuki YAMANE ,  Masao KONDO

IPC: H01M50/536 ,  H01M50/533

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.

公开(公告)号：US11387496B2

公开(公告)日：2022-07-12

申请号：US17111750

申请日：2020-12-04

Applicant: FDK CORPORATION

Inventor： Takahiro Endo ,  Yuki Natsume ,  Takeo Nogami ,  Hidenori Tsuzuki

IPC: H01M4/06 ,  H01M4/24 ,  H01M4/42 ,  H01M4/50 ,  H01M6/02 ,  H01M6/08 ,  H01M10/28 ,  H01M6/18

Abstract: An alkaline battery is made by press-fitting a plurality of tubular positive electrode pellets inside of an open end of a cylindrical positive electrode can. The press-fitting is performed in such a manner as to stack the positive electrode pellets coaxially inside of and in contact with the positive electrode can, with gaps between adjacent positive electrode pellets. A separator is disposed inside of the tubular pellets, and a negative electrode mixture is placed inside of the separator. A negative electrode current collector is inserted into the negative electrode mixture, and the opening at the open end of the positive electrode can is sealed with a negative electrode terminal plate.

公开(公告)号：US20220021231A1

公开(公告)日：2022-01-20

申请号：US17305401

申请日：2021-07-07

Applicant: FDK CORPORATION

Inventor： Shunichiro Sugimori ,  Yusuke Kusagaya ,  Takashi Kabasawa

IPC: H02J7/00

Abstract: A battery indicator estimates a remaining battery capacity when a controller instructs a driving power source to start the power supply based on a battery voltage detected at a timing when the controller instructs the driving power source to start the power supply. The controller instructs the driving power source to stop the power supply after the discharge of a secondary battery by a charge-discharge circuit is ended and at a timing when a battery voltage being measured by a voltage measurer is stabilized.

公开(公告)号：US20210384755A1

公开(公告)日：2021-12-09

申请号：US17445482

申请日：2021-08-19

Applicant: FDK CORPORATION

Inventor： Masatsuru Miyazaki ,  Norio Fukui

IPC: H02J7/02 ,  H02J7/06 ,  H01M10/44 ,  H02M7/06

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.

公开(公告)号：US20210344204A1

公开(公告)日：2021-11-04

申请号：US17268912

申请日：2019-06-14

Applicant: FDK CORPORATION

Inventor： Shun Mochizuki

IPC: H02J7/00

Abstract: A power storage device 1 includes first power storage unit BBU1 to seventh power storage unit BBU7 connected in series and a control unit 10 for monitoring each unit voltage and controlling each of the power storage units, each power storage unit BBU 1-7 includes a power storage portion BAT and a charge switch SWC connected in series between charge/discharge terminals T and a bypass switch SWB providing a bypass between the charge/discharge terminals T, and for the respective power storage units connected in series, the control unit 10 equalizes the unit voltages by individually setting a charging mode in which the bypass switch SWB is controlled to be set to OFF while the charge switch SWC is controlled to be set to ON to charge the power storage portion BAT with a constant current, and a bypass mode in which the bypass switch SWB is controlled to be set to ON while the charge switch SWC is controlled to be set to OFF to stop charging of the power storage portion BAT.

公开(公告)号：US20210091415A1

公开(公告)日：2021-03-25

申请号：US17111750

申请日：2020-12-04

Applicant: FDK CORPORATION

Inventor： Takahiro ENDO ,  Yuki NATSUME ,  Takeo NOGAMI ,  Hidenori TSUZUKI

IPC: H01M10/28 ,  H01M4/06 ,  H01M6/08 ,  H01M4/50 ,  H01M4/24 ,  H01M4/42 ,  H01M6/02 ,  H01M6/18

Abstract: An alkaline battery is made by press-fitting a plurality of tubular positive electrode pellets inside of an open end of a cylindrical positive electrode can. The press-fitting is performed in such a manner as to stack the positive electrode pellets coaxially inside of and in contact with the positive electrode can, with gaps between adjacent positive electrode pellets. A separator is disposed inside of the tubular pellets, and a negative electrode mixture is placed inside of the separator. A negative electrode current collector is inserted into the negative electrode mixture, and the opening at the open end of the positive electrode can is sealed with a negative electrode terminal plate.

公开(公告)号：US10923698B2

公开(公告)日：2021-02-16

申请号：US15983070

申请日：2018-05-17

Applicant: FDK CORPORATION

Inventor： Yuya Iida ,  Yasuaki Egawa ,  Daisuke Hirata ,  Ryuji Ito ,  Akihiro Yamamoto

IPC: H01M2/08 ,  H01M6/16 ,  H01M2/16 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2/02 ,  H01M10/42

Abstract: A laminate-type power storage element includes a flat plate-shaped electrode body and an exterior body. The electrode body is configured by stacking a sheet-shaped positive electrode and a sheet-shaped negative electrode on either side of a separator. The exterior body is formed in a flattened bag-shape by thermocompression bonding peripheral edge regions of two opposing laminated films, to seal the electrode body inside the flattened bag-shape of the exterior body together with an electrolyte. The separator has a sheet-shaped substrate and at least one bonding layer formed on at least one surface of the substrate. A peripheral edge portion of the separator is sandwiched between and bonded by the two laminated films at a peripheral inside of the peripheral edge regions of the two laminated films.

公开(公告)号：US10797595B2

公开(公告)日：2020-10-06

申请号：US16518207

申请日：2019-07-22

Applicant: FDK CORPORATION

Inventor： Yu Yonezawa ,  Jun Oikawa ,  Eiji Nagashima ,  Yoshiyasu Nakashima

IPC: H02M3/156 ,  G01R1/20 ,  G01R19/00 ,  G05F1/10 ,  H02M1/14 ,  H02M1/00

Abstract: A current detection circuit included in a power supply detects a current flowing to an inductance element from a detection tap of an inductance element connected between an output terminal and an output of a first switching element. A control circuit included in the power supply controls a first control terminal of the first switching element and a second control terminal of a second switching element and calculates an output current flowing to a load based on the current detected by the current detection circuit.

公开(公告)号：US10797419B2

公开(公告)日：2020-10-06

申请号：US15537978

申请日：2015-11-20

Applicant: FDK CORPORATION

Inventor： Makoto Sakaguchi ,  Nozomi Asano

IPC: H01R13/03 ,  H01C7/02 ,  H01M2/30 ,  H01M2/34 ,  H01M10/42 ,  H01M8/00

Abstract: An externally-attached PTC element attachable to one electrode terminal of a tubular battery with electrode terminals on both end surfaces, the externally-attached PTC element including: a bottom plate made of a metal plate; a plate-shaped PTC element; and a top panel made of a metal plate, the plate-shaped PTC element and the top panel being stacked in that order above the bottom plate disposed below, the PTC element being disposed in an opposed area between the top panel and the bottom plate, the top panel projecting and extending in one direction with respect to a planar area of the bottom plate, the top panel having a distal end formed into a lead terminal shape mountable to a circuit board.

公开(公告)号：US10693362B2

公开(公告)日：2020-06-23

申请号：US16226260

申请日：2018-12-19

Applicant: FDK CORPORATION

Inventor： Kenji Hamada ,  Tadashi Sato ,  Norio Fukui

IPC: H02M3/337 ,  H02M1/08 ,  H02M3/335 ,  H02M1/00 ,  H02M1/38

Abstract: A switching power supply includes an insulated transformer, a full-bridge circuit which converts input DC power into AC power and outputs the AC power to a primary-side coil, an output circuit which converts AC power input from secondary-side coils into DC power and outputs the DC power, and a control circuit which controls the full-bridge circuit by using a phase shift method based on voltage output by the output circuit. When a measured value of the amount of phase shift determined from at least one of the voltage and current output by the output circuit is smaller than a theoretical value of the amount of phase shift corresponding to the switching power supply operating in a continuous current mode, the control circuit prolongs dead time used in the full-bridge circuit in accordance with the difference between the measured value and the theoretical value.