公开(公告)号：US20220069285A1

公开(公告)日：2022-03-03

申请号：US17446285

申请日：2021-08-27

Applicant: FDK CORPORATION

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

IPC: H01M4/134 ,  H01M10/054 ,  C22C19/03

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.

公开(公告)号：US11043664B2

公开(公告)日：2021-06-22

申请号：US16383048

申请日：2019-04-12

Applicant: FDK CORPORATION

Inventor： Toshiki Sato ,  Jun Ishida ,  Akira Saguchi ,  Shota Ohata

IPC: H01M4/24 ,  H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M10/28 ,  H01M4/02

Abstract: A battery comprises an electrode group including a separator, a positive electrode and a negative electrode. The negative electrode comprises a negative electrode core, negative electrode mixture layers retained to the negative electrode core, and a fluorine resin layer disposed on the surface of the negative electrode mixture layers. The negative electrode mixture layers include a first outermost peripheral region located at the outermost periphery of the electrode group and a second outermost peripheral region located opposite to the first outermost peripheral region. When the amount of the fluorine resin constituting a first fluorine resin layer in a portion of the first outermost peripheral region is represented by A, and the amount of the fluorine resin constituting a second fluorine resin layer in a portion of the second outermost peripheral region is represented by B, a relation A>B is satisfied.

公开(公告)号：US20200303726A1

公开(公告)日：2020-09-24

申请号：US16088375

申请日：2017-02-09

Applicant: FDK CORPORATION

Inventor： Akira Saguchi ,  Jun Ishida ,  Shota Ohata

IPC: H01M4/24 ,  H01M4/38 ,  H01M4/62 ,  H01M4/04 ,  H01M4/26 ,  H01M10/30

Abstract: A nickel hydrogen secondary battery 2 has an electrode group 22 composed of a separator 28, a positive electrode 24 and a negative electrode 26, wherein the negative electrode 26 has a negative electrode core body and a negative electrode mixture held on the negative electrode core body; the negative electrode mixture comprises a hydrogen absorbing alloy powder composed of particles of a hydrogen absorbing alloy, a powder of an electroconductive agent, and a powder of a negative electrode additive; and the electroconductive agent is a hollow carbon black whose primary particle has a hollow-shell structure, and the negative electrode additive is a fluorine-containing anionic surfactant.

公开(公告)号：US11817573B2

公开(公告)日：2023-11-14

申请号：US17446285

申请日：2021-08-27

Applicant: FDK CORPORATION

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

IPC: H01M10/00 ,  H01M4/134 ,  C22C19/03 ,  H01M10/054 ,  H01M4/02

CPC classification number: H01M4/134 ,  C22C19/03 ,  H01M10/054 ,  C22C2202/04 ,  H01M2004/027

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.

公开(公告)号：US20220384786A1

公开(公告)日：2022-12-01

申请号：US17660387

申请日：2022-04-22

Applicant: FDK CORPORATION

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

IPC: H01M4/36 ,  H01M4/62 ,  H01M10/30

Abstract: A nickel metal hydride secondary battery comprises an outer can and an electrode assembly housed in the outer can together with an alkaline electrolytic solution, wherein the electrode assembly is such that a positive electrode including a positive electrode mixture and a negative electrode including a negative electrode mixture are superimposed with a separator interposed therebetween, the positive electrode mixture includes nickel hydroxide forming a solid solution with zinc as a positive electrode active material and zinc oxide as a positive electrode additive, the negative electrode mixture includes hydrogen absorbing alloy particles and a negative electrode additive, the negative electrode additive is a composite in which yttrium fluoride is supported on carbon black, and a surface of the hydrogen absorbing alloy particles is partially coated with the composite.

公开(公告)号：US20190319260A1

公开(公告)日：2019-10-17

申请号：US16383048

申请日：2019-04-12

Applicant: FDK CORPORATION

Inventor： Toshiki Sato ,  Jun Ishida ,  Akira Saguchi ,  Shota Ohata

IPC: H01M4/24 ,  H01M10/28 ,  H01M4/36 ,  H01M4/62 ,  H01M4/38

Abstract: A battery comprises an electrode group including a separator, a positive electrode and a negative electrode. The negative electrode comprises a negative electrode core, negative electrode mixture layers retained to the negative electrode core, and a fluorine resin layer disposed on the surface of the negative electrode mixture layers. The negative electrode mixture layers include a first outermost peripheral region located at the outermost periphery of the electrode group and a second outermost peripheral region located opposite to the first outermost peripheral region. When the amount of the fluorine resin constituting a first fluorine resin layer in a portion of the first outermost peripheral region is represented by A, and the amount of the fluorine resin constituting a second fluorine resin layer in a portion of the second outermost peripheral region is represented by B, a relation A>B is satisfied.

公开(公告)号：US20190148723A1

公开(公告)日：2019-05-16

申请号：US16180646

申请日：2018-11-05

Applicant: FDK CORPORATION

Inventor： Akira Saguchi ,  Jun Ishida ,  Shota Ohata

IPC: H01M4/38 ,  H01M4/24 ,  H01M4/62 ,  H01M10/30

Abstract: A nickel hydrogen secondary battery 2 has an electrode group 22 including a separator 28, a positive electrode 24, and a negative electrode 26. The negative electrode 26 has a negative electrode core, and a negative electrode mixture held on the negative electrode core. The negative electrode mixture contains a hydrogen absorbing alloy and a water repellent. The hydrogen absorbing alloy has a composition represented by the general formula: Ln1-xMgxNiy-a-bAlaMb, where Ln represents at least one element selected from rare earth elements, Ti and Zr; M represents at least one element selected from V, Nb, Ta, and the like, and the subscripts a, b, x and y satisfy relations represented by 0.05≤a≤0.30, 0≤b≤0.50, 0≤x

公开(公告)号：US11355753B2

公开(公告)日：2022-06-07

申请号：US16832811

申请日：2020-03-27

Applicant: FDK CORPORATION

Inventor： Jun Ishida ,  Akira Saguchi ,  Shota Ohata

IPC: H01M4/52 ,  C22C1/04 ,  C22C19/00 ,  H01M4/24 ,  H01M4/32 ,  H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M10/30 ,  H01M10/34 ,  H01M4/02

Abstract: A negative electrode used in a nickel metal hydride secondary battery includes a negative electrode core body and a negative electrode mixture carried on the negative electrode core body. The negative electrode mixture includes hydrogen storage alloy powder which is an aggregate of hydrogen storage alloy particles, a binder, and a thickener. The hydrogen storage alloy particles have a volume mean particle size of 40 μm or less and a concentration of chlorine of not less than 180 ppm to not more than 780 ppm.

公开(公告)号：US11038161B2

公开(公告)日：2021-06-15

申请号：US16357050

申请日：2019-03-18

Applicant: FDK CORPORATION

Inventor： Shota Ohata ,  Jun Ishida ,  Toshiki Sato ,  Akira Saguchi

IPC: H01M4/38 ,  H01M10/34 ,  H01M4/24 ,  H01M4/62 ,  H01M4/36 ,  H01M4/60 ,  H01M4/02

Abstract: A nickel-hydrogen secondary battery includes an electrode group which contains a positive electrode, a negative electrode, and a separator, wherein the negative electrode includes a negative electrode core, and a negative electrode mixture layer held by the negative electrode core, wherein the negative electrode mixture layer contains a fluororesin; a quantity of the fluororesin, expressed by a mass applied per unit area of the negative electrode, is within a range of 0.2 mg/cm2 or more and 2.0 mg/cm2 or less; and a fluororesin content which is a ratio of the fluororesin contained in a unit volume of the negative electrode mixture layer is higher in an inner layer portion than in an outer layer portion in the negative electrode mixture layer.

公开(公告)号：US20180114981A1

公开(公告)日：2018-04-26

申请号：US15561843

申请日：2016-03-10

Applicant: FDK CORPORATION

Inventor： Jun Ishida ,  Masaru Kihara ,  Akira Saguchi ,  Yusuke Shingai ,  Takuya Kai ,  Takeshi Kajiwara

IPC: H01M4/38 ,  C22C19/03 ,  C22F1/10 ,  C22F1/02 ,  H01M10/30 ,  H01M10/26 ,  H01M2/02 ,  H01M4/58

Abstract: A nickel-hydrogen secondary battery includes an electrode group that includes a separator, a positive electrode and a negative electrode, and the negative electrode contains a hydrogen storage alloy having a crystal structure in which an AB2 type unit and an AB5 type unit are laminated, in which a PCT characteristic diagram at 80° C. includes a first plateau region having a hydrogen pressure Pd1 when hydrogen is stored by 0.25 times an effective hydrogen storage amount that is a hydrogen storage amount when a hydrogen pressure is 1 MPa, and a second plateau region having a hydrogen pressure Pd2 when hydrogen is stored by 0.70 times the effective hydrogen storage amount, and Pd1 and Pd2 satisfy a relation of 0.6≤log10(Pd2/Pd1).