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公开(公告)号：US10693194B2
公开(公告)日：2020-06-23
申请号：US15317106
申请日：2015-06-23
Applicant: FDK CORPORATION
Inventor： Masaru Kihara , Akira Saguchi , Yusuke Shingai , Jun Ishida , Takuya Kai
Abstract: A nickel hydrogen secondary battery accommodates an electrode group including a positive electrode and a negative electrode which are stacked one on top of another through a separator, together with an alkaline electrolyte. The battery contains Li, with a total amount of Li in the battery 2 of 15 to 50 mg/Ah, as determined as the mass in terms of LiOH per Ah of the positive electrode capacity. The negative electrode includes particles of rare earth-Mg—Ni-based hydrogen storage alloy which contains a rare earth element, Mg and Ni. The hydrogen storage alloy particles 44 includes, on the surface thereof, a rare earth hydroxide which is the hydroxide of a rare earth element and has a specific surface area of 0.1 to 0.5 m2/g.
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公开(公告)号：US20170125804A1
公开(公告)日：2017-05-04
申请号：US15300624
申请日：2015-03-04
Applicant: FDK CORPORATION
Inventor： Jun Ishida , Takuya Kai
CPC classification number: H01M4/385 , C22C19/03 , C22C28/00 , C22C30/00 , H01M4/242 , H01M4/383 , H01M10/345
Abstract: A nickel hydrogen secondary battery includes an outer can and an electrode group accommodated in the outer can in a sealed state together with an alkaline electrolyte. The electrode group includes a positive electrode and a negative electrode having a separator sandwiched therebetween, the alkaline electrolyte includes NaOH as the main solute, and the negative electrode includes a hydrogen storage alloy having a composition represented by a general formula: Ln1-xMgxNiy-zMz, wherein Ln is at least one element selected from rare earth elements and Zr; M is Al; subscripts x, y and z satisfy the following relations, respectively: 0≦x≦0.05, 3.3≦y≦3.6, and 0≦z≦0.50; and the content of La among rare earth elements in Ln is 25% or less.
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公开(公告)号：US12300809B2
公开(公告)日：2025-05-13
申请号：US17660387
申请日：2022-04-22
Applicant: FDK CORPORATION
Inventor： Akira Saguchi , Shota Ohata , Jun Ishida , Yuki Ehara , Masaru Kihara
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.
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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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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
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.
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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
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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17.发明申请
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
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
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18.发明公开
公开(公告)号：US20230411622A1
公开(公告)日：2023-12-21
申请号：US18337343
申请日：2023-06-19
Applicant: FDK CORPORATION
Inventor： Yuya Tanimoto , Jun Ishida , Yuzo Imoto , Yuki Ehara
CPC classification number: H01M4/62 , H01M10/30 , H01M4/366 , H01M4/52 , H01M2004/028
Abstract: A positive electrode for an alkaline secondary battery has high discharge capacity in a low temperature environment. The positive electrode included in the alkaline secondary battery has a positive electrode active material including 100 parts by mass of nickel hydroxide, and an additive including yttrium oxide. The nickel hydroxide includes an α-phase single phase.
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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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20.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.
