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11.发明申请公开(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
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).
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公开(公告)号：US20170110764A1
公开(公告)日：2017-04-20
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：US11876186B2
公开(公告)日：2024-01-16
申请号：US17158711
申请日：2021-01-26
Applicant: FDK CORPORATION
Inventor： Akira Saguchi
IPC: H01M10/28 , H01M4/04 , H01M50/107 , H01M10/04 , H01M50/131 , H01M4/02
CPC classification number: H01M10/286 , H01M4/0404 , H01M10/0422 , H01M10/288 , H01M50/107 , H01M50/131 , H01M2004/021
Abstract: An alkaline storage battery includes a spiral electrode group in which a positive electrode plate, a negative electrode plate, and a separator arranged between the positive electrode plate and the negative electrode plate are laminated, the negative electrode plate is located on the inner peripheral side of the positive electrode plate at an innermost peripheral portion, and an electrically conductive outer packaging can in which the spiral electrode group is accommodated together with an alkaline electrolytic solution. The negative electrode plate includes a negative electrode core body, a first negative electrode mixture layer carried on a surface on the outer peripheral side of the negative electrode core body, and a second negative electrode mixture layer carried on a surface on the inner peripheral side of the negative electrode core body. The negative electrode core body has a burr protruding toward the outer peripheral side at an edge portion of an innermost peripheral portion of the negative electrode core body. The thickness of the edge portion of an innermost peripheral portion of the first negative electrode mixture layer is smaller than the thickness of a portion other than the edge portion of the first negative electrode mixture layer. The height of the burr is 30% or less of the thickness of the separator.
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公开(公告)号：US20210257674A1
公开(公告)日：2021-08-19
申请号：US17158711
申请日：2021-01-26
Applicant: FDK CORPORATION
Inventor： Akira Saguchi
IPC: H01M10/28 , H01M4/04 , H01M50/107 , H01M10/04 , H01M50/131
Abstract: An alkaline storage battery includes a spiral electrode group in which a positive electrode plate, a negative electrode plate, and a separator arranged between the positive electrode plate and the negative electrode plate are laminated, the negative electrode plate is located on the inner peripheral side of the positive electrode plate at an innermost peripheral portion, and an electrically conductive outer packaging can in which the spiral electrode group is accommodated together with an alkaline electrolytic solution. The negative electrode plate includes a negative electrode core body, a first negative electrode mixture layer carried on a surface on the outer peripheral side of the negative electrode core body, and a second negative electrode mixture layer carried on a surface on the inner peripheral side of the negative electrode core body. The negative electrode core body has a burr protruding toward the outer peripheral side at an edge portion of an innermost peripheral portion of the negative electrode core body. The thickness of the edge portion of an innermost peripheral portion of the first negative electrode mixture layer is smaller than the thickness of a portion other than the edge portion of the first negative electrode mixture layer. The height of the burr is 30% or less of the thickness of the separator.
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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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Patent Agency Ranking
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：US12183894B2
公开(公告)日：2024-12-31
申请号：US17653282
申请日：2022-03-02
Applicant: FDK CORPORATION
Inventor： Akira Saguchi
Abstract: An electrode has a band-shaped core and an electrode mixture layer carried by the core to form a spiral electrode assembly with a gas generating electrode and a separator for an alkaline secondary battery. The electrode in the spiral shape has a first circumference portion, an intermediate portion, and an outermost circumference portion. The first circumference portion is a starting portion for winding into the spiral shape. The intermediate portion is a second and following circumferences of the spiral shape. The outermost circumference portion has an inner surface only which faces the gas generating electrode. The electrode mixture layer includes a reactant that develops a reaction consuming gas generated from the gas generating electrode. An amount of the reactant in the first circumference portion is more than those in the intermediate portion and/or the outermost circumference portion.
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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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19.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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20.发明申请公开(公告)号：US20180248172A1
公开(公告)日：2018-08-30
申请号：US15549144
申请日：2016-02-24
Applicant: FDK CORPORATION
Inventor： Masaru Kihara , Akira Saguchi , Yusuke Shingai , Jun Ishida , Takuya Kai , Takeshi Kajiwara
Abstract: A nickel hydrogen secondary battery comprises an outer can and an electrode group accommodated in a hermetically sealed state together with an alkaline electrolyte solution in the outer can, wherein the electrode group comprises a positive electrode and a negative electrode stacked through a separator, wherein the negative electrode contains a hydrogen absorbing alloy powder that is an aggregate of particles of a hydrogen absorbing alloy, wherein the hydrogen absorbing alloy powder is such that when an average particle size of the particles is represented by M; a particle size of ½ of the M is represented by P; and a particle size of ⅓ of the M is represented by Q, a content of the particles having a particle size equal to or smaller than the P is lower than 20% by mass of the whole of the hydrogen absorbing alloy powder; and the content of the particles having a particle size equal to or smaller than the Q is lower than 10% by mass of the whole of the hydrogen absorbing alloy powder.
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