公开(公告)号：US20240055886A1

公开(公告)日：2024-02-15

申请号：US18268507

申请日：2021-09-27

Applicant: FDK CORPORATION

Inventor： Kiyotaka KUMAMOTO ,  Yosuke SAITO ,  Yasuyuki KATSUBE ,  Kazuhiro HIWATASHI

IPC: H02J7/34 ,  H02J7/00 ,  H02J7/24

CPC classification number: H02J7/34 ,  H02J7/0016 ,  H02J7/243 ,  H02J7/0018

Abstract: This power supply device includes a battery unit which includes: a first battery pack; a step-up/down circuit for boosting the voltage of an external power supply up to the charge voltage of the battery pack; a first charge circuit; a first discharge circuit for detecting a voltage drop of the external power supply and performing discharge from the battery pack to a load device; and a control circuit for controlling charging and discharging. The discharge circuit has a first discharge switch and a second discharge switch which are connected in series between the battery pack and a power supply line. The first discharge switch is switched on/off by receiving a switching signal from the control circuit, and the second discharge switch is directly switched on/off not via the control circuit on the basis of the voltage of the external power supply.

公开(公告)号：US11888163B2

公开(公告)日：2024-01-30

申请号：US17372523

申请日：2021-07-12

Applicant: FDK CORPORATION

Inventor： Takuro Manabe ,  Yuya Suzuki ,  Toshiaki Nakano

IPC: H01M50/00 ,  H01M4/62 ,  H01M50/469 ,  H01M4/42 ,  H01M4/50 ,  H01M6/08

CPC classification number: H01M4/623 ,  H01M4/42 ,  H01M4/50 ,  H01M6/08 ,  H01M50/469

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.

公开(公告)号：US20230307943A1

公开(公告)日：2023-09-28

申请号：US18187756

申请日：2023-03-22

Applicant: FDK CORPORATION

Inventor： Masato KATO ,  Naoaki KONDA

IPC: H02J9/06

CPC classification number: H02J9/061 ,  H02J9/068

Abstract: The backup power supply apparatus is an apparatus that supplies power to a power-supply target apparatus operating by power supply from an external power source when a power supply state of the external power source is emergency. The backup power supply apparatus includes: a power storage section; a series regulator that is located on a line connecting the power storage section and the power-supply target apparatus; and control circuitry that changes an output voltage of the series regulator in multiple stages in accordance with a change in the power supply state of the external power source and a change in a voltage of the power storage section.

公开(公告)号：US20230238824A1

公开(公告)日：2023-07-27

申请号：US17999636

申请日：2021-04-30

Applicant: FDK CORPORATION

Inventor： Katsuhiko Tamaki

IPC: H02J9/06 ,  H02J7/00 ,  H01M10/30 ,  H01M10/46

CPC classification number: H02J9/061 ,  H01M10/30 ,  H01M10/46 ,  H02J7/0013 ,  H02J7/007182

Abstract: A backup power supply device having a short charging time is provided. The backup power supply device for supplying power when a main power supply is under a power failure includes first and second battery packs connected in parallel, a charging circuit for charging the first and second battery packs, first and second discharging switches for causing the first and second battery packs to discharge to the load device respectively, and a control unit. The control unit compares the battery voltages of the first and second battery packs with an output voltage from the main power supply. The control unit sets the first and second discharging switches to ON when the battery voltages are lower than the output voltage. When the battery voltage of the battery pack exceeds the output voltage of the main power supply due to charging, the control unit sets the first discharging switch and the second discharging switch to OFF. Thereafter, after the first and second battery packs are fully charged, the control unit switches the first and second discharging switches to ON when the battery voltage has dropped to a dischargeable upper limit voltage.

公开(公告)号：US20230216048A1

公开(公告)日：2023-07-06

申请号：US17927682

申请日：2021-05-20

Applicant: FDK CORPORATION ,  Kansai Catalyst Co., Ltd.

Inventor： Juji KATO ,  Tomohiro FUJISAWA ,  Yuji GOTO ,  Kouichi HASHIMOTO

IPC: H01M4/58 ,  H01M10/058 ,  C01B25/45

CPC classification number: H01M4/5825 ,  H01M10/058 ,  C01B25/45 ,  H01M2004/028

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.

公开(公告)号：USD984268S1

公开(公告)日：2023-04-25

申请号：US35512656

申请日：2021-03-29

Applicant: FDK CORPORATION

Designer： Yuya Iida

公开(公告)号：US20230118823A1

公开(公告)日：2023-04-20

申请号：US17905144

申请日：2021-02-04

Applicant: FDK CORPORATION

Inventor： Yusuke Kusagaya

IPC: H01M10/42 ,  H01M10/48 ,  H01M50/296 ,  G01R31/387

Abstract: Provided is a battery pack that is charged by being connected to a charger and discharged by being connected to a load, the battery pack including: a charge-discharge terminal 1a including a positive electrode terminal, a negative electrode terminal, and a temperature terminal; a secondary battery that is charged and discharged through the positive electrode terminal and the negative electrode terminal; a current measurement unit that measures a charge-discharge current of the secondary battery; a thermistor which is connected to the temperature terminal and which measures a battery temperature of the secondary battery; a voltage switching unit that intermittently outputs to the temperature terminal an applied voltage that causes the thermistor to operate; and a control unit that recognizes a connected state of the charge-discharge terminal on the basis of the voltage at the temperature terminal in an on-period and an off-period of the applied voltage, and the charge-discharge current.

公开(公告)号：US20230118126A1

公开(公告)日：2023-04-20

申请号：US17906066

申请日：2021-02-04

Applicant: FDK CORPORATION

Inventor： Yasunari Mizoguchi ,  Yusuke Kusagaya

IPC: H01M10/42 ,  H01M10/48 ,  H01M10/46 ,  H02J7/00 ,  H01M10/44

Abstract: A battery pack is provided in which the battery pack itself can recognize a determination of a full charge, which is made by a charger, without using a communication line. A battery pack is provided with a secondary battery, current measurement means for measuring a charging current for charging the secondary battery, and a control circuit which receives an output signal from the current measurement means. The control circuit determines that the secondary battery is fully charged when a reduction rate of the charging current in a unit time exceeds a predetermined value.

公开(公告)号：US20230035670A1

公开(公告)日：2023-02-02

申请号：US17758995

申请日：2021-02-16

Applicant: FDK CORPORATION

Inventor： Jinichi Sakamoto ,  Yusuke Kusagaya

IPC: G06F11/20 ,  G06F11/00 ,  G06F8/65

Abstract: A control unit is configured to determine success or failure of a rewrite process after end of the rewrite process, and write success or failure display data into a success or failure determination result storage area in accordance with the success or failure, and read the success or failure display data present in the success or failure determination result storage area after startup of an electronic device, and execute a control program, in lieu of carrying out the rewrite process, when it is determined that the success or failure display data indicate a success of the rewrite process.

公开(公告)号：US20220384808A1

公开(公告)日：2022-12-01

申请号：US17663383

申请日：2022-05-13

Applicant: FDK CORPORATION

Inventor： Yuki Ehara ,  Jun Ishida ,  Shota Ohata ,  Akira Saguchi ,  Masaru Kihara

IPC: H01M4/58 ,  H01M4/36 ,  H01M4/62

Abstract: A negative electrode for an alkaline storage battery that achieves both an improvement in cycle life and an improvement in low temperature discharge characteristics, and an alkaline storage battery including the negative electrode are disclosed. The negative electrode for an alkaline storage battery includes a negative electrode core body formed of metal, and a negative electrode mixture layer which contains at least a hydrogen storage alloy and yttrium fluoride, and is carried on the negative electrode core body. Particles of the yttrium fluoride are formed so that the average particle size thereof is equal to 1 μm or more and 7 μm or less.