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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.
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2.发明授权公开(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
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.
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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
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.
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公开(公告)号：US20220384779A1
公开(公告)日：2022-12-01
申请号：US17744647
申请日：2022-05-14
Applicant: FDK CORPORATION
Inventor： Shota Ohata , Akira Saguchi , Jun Ishida , Yuki Ehara , Masaru Kihara
Abstract: A hydrogen absorbing alloy negative electrode is provided. The hydrogen absorbing alloy negative electrode has a hydrogen absorbing alloy, and an additive including yttrium fluoride. A mass of the yttrium fluoride is 0.1 parts by mass or more and 0.2 parts by mass or less based on a hydrogen absorbing alloy powder of 100 parts by mass.
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公开(公告)号：US20200313179A1
公开(公告)日：2020-10-01
申请号：US16832811
申请日：2020-03-27
Applicant: FDK CORPORATION
Inventor： Jun Ishida , Akira Saguchi , Shota Ohata
IPC: H01M4/52 , H01M10/34 , H01M4/36 , H01M10/30 , H01M4/24 , H01M4/62 , H01M4/38 , C22C19/00 , C22C1/04 , H01M4/32
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.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20190305301A1
公开(公告)日：2019-10-03
申请号：US16357050
申请日：2019-03-18
Applicant: FDK CORPORATION
Inventor： Shota Ohata , Jun Ishida , Toshiki Sato , Akira Saguchi
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.
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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.
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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
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.
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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
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.
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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.
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