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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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Patent Agency Ranking
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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3.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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公开(公告)号：US09306215B2
公开(公告)日：2016-04-05
申请号：US13945824
申请日：2013-07-18
Applicant: FDK CORPORATION
Inventor： Takuya Kai , Jun Ishida
CPC classification number: H01M4/383 , C01B3/0057 , C22C1/02 , C22C1/0433 , C22C19/058 , H01M4/242 , H01M10/345 , H01M2300/0014 , Y02E60/124 , Y02E60/327
Abstract: A nickel-metal hydride secondary cell holds therein an electrode group and an alkaline electrolyte solution containing NaOH as a main constituent of its solute. The electrode group has positive and negative electrodes lapped one over the other with a separator therebetween. The negative electrode contains a hydrogen absorbing alloy having a composition represented by the general formula: (RE1-xTx)1-yMgyNiz-aAla (where RE is at least one element selected from among Y, Sc and rare-earth elements, T is at least one element selected from among Zr, V and Ca, and subscripts x, y, z and a are values respectively satisfying 0≦x, 0.05≦y≦0.35, 2.8≦z≦3.9, and 0.10≦a≦0.25), the hydrogen absorbing alloy has a crystal structure in which an AB2 subunit and an AB5 subunit are superimposed one upon the other, and Cr is substituted for part of the Ni.
Abstract translation: 镍氢二次电池容纳有电极组和含有NaOH作为其溶质的主要成分的碱性电解液。 电极组具有正极和负极之间彼此重叠的隔板。 负极含有具有以下通式表示的组成的吸氢合金：（RE1-xTx）1-yMgyNiz-aAla（其中RE为选自Y，Sc和稀土元素中的至少一种元素，T为 选自Zr，V和Ca中的至少一种元素，下标x，y，z和a分别满足0＆lt; nlE; x，0.05＆nlE; y＆nlE; 0.35,2.8＆nlE; z＆nlE; 3.9和0.10＆nlE; a＆nlE; 0.25 ），吸氢合金具有其中AB2亚基和AB5亚单位彼此重叠的晶体结构，Cr代替部分Ni。
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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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