公开(公告)号：US20190190083A1

公开(公告)日：2019-06-20

申请号：US16219710

申请日：2018-12-13

Applicant: FDK CORPORATION

Inventor： Yuzo Imoto ,  Yuya Tanimoto ,  Tetsuya Yamane ,  Masaru Kihara

IPC: H01M10/34 ,  H01M2/02 ,  H01M4/38 ,  H01M4/52

CPC classification number: H01M10/345 ,  H01M2/022 ,  H01M2/0285 ,  H01M4/383 ,  H01M4/52 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2300/0014

Abstract: A nickel hydrogen secondary battery 2 has an outer can 10, and an electrode group 22 accommodated together with an alkali electrolyte solution in the outer can 10. The electrode group 22 includes a positive electrode 24 and a negative electrode 26 stacked through a separator 28. The positive electrode 24 includes a first positive electrode active substance and a second positive electrode active substance. These first and second positive electrode active substances each contain nickel hydroxide as a main component, and the first positive electrode active substance and the second positive electrode active substance differ in the amount of magnesium solid-dissolved.

公开(公告)号：US12021222B2

公开(公告)日：2024-06-25

申请号：US17274772

申请日：2019-08-15

Applicant: FDK CORPORATION

Inventor： Yuya Tanimoto ,  Yuzo Imoto ,  Tetsuya Yamane ,  Masaru Kihara ,  Hideyuki Asanuma

IPC: H01M4/32 ,  H01M4/36 ,  H01M4/38 ,  H01M4/52 ,  H01M4/62 ,  H01M10/30

CPC classification number: H01M4/32 ,  H01M4/366 ,  H01M4/383 ,  H01M4/52 ,  H01M4/62 ,  H01M10/30

Abstract: A battery 2 includes an outer can 10 and an electrode group 22 that is housed in the outer can 10 together with an alkaline electrolytic solution, in which a positive electrode 24 included in the electrode group 22 includes a positive electrode substrate and a positive electrode mixture supported on the positive electrode substrate, the positive electrode mixture includes nickel hydroxide, yttrium oxide serving as a first additive, and niobium oxide or titanium oxide serving as a second additive, a total amount of the first additive and the second additive is 0.1 parts by mass or more and 2.5 parts by mass or less per 100 parts by mass of the nickel hydroxide, a mass ratio of the first additive and the second additive is in a relationship of 1:0.2 to 5, and the positive electrode mixture after an activation treatment has a resistivity of 1 Ω·m or more and 10 Ω·m or less.

公开(公告)号：US20240118348A1

公开(公告)日：2024-04-11

申请号：US18475889

申请日：2023-09-27

Applicant: FDK CORPORATION

Inventor： Tetsuya Yamane ,  Tetsu Yamanaka ,  Masanori Tamura ,  Hideyuki Asanuma

IPC: G01R31/392 ,  G01R31/367 ,  G01R31/378

CPC classification number: G01R31/392 ,  G01R31/367 ,  G01R31/378

Abstract: A method of estimating life of a nickel-metal hydride battery that accommodates a positive electrode plate and a negative electrode plate facing the positive electrode plate with a separator therebetween and containing a hydrogen absorbing alloy together with an electrolyte is disclosed. A charge phase of charging the nickel-metal hydride battery and a discharge phase of discharging the nickel-metal hydride battery after the charge phase constitutes one cycle for charge/discharge of the nickel-metal hydride battery. The method includes: determining a rate of change after one charge/discharge cycle of a surface area of the negative electrode plate which is a boundary face in contact with the electrolyte, and determining an amount of corrosion of the hydrogen absorbing alloy based on the rate of change accumulated for n charge/discharge cycles to estimate the life of the nickel-metal hydride battery based on the amount of corrosion.

公开(公告)号：US12021223B2

公开(公告)日：2024-06-25

申请号：US17275297

申请日：2019-08-15

Applicant: FDK CORPORATION

Inventor： Tetsuya Yamane ,  Yuzo Imoto ,  Yuya Tanimoto ,  Masaru Kihara ,  Hideyuki Asanuma

IPC: H01M4/32 ,  H01M4/02 ,  H01M4/62 ,  H01M10/30

CPC classification number: H01M4/32 ,  H01M4/62 ,  H01M10/30 ,  H01M2004/028

Abstract: A battery 2 includes an outer can 10 and an electrode group 22 that is housed in the outer can 10 together with an alkaline electrolytic solution, in which a positive electrode 24 included in the electrode group 22 includes a positive electrode substrate and a positive electrode mixture supported on the positive electrode substrate, the positive electrode mixture includes nickel hydroxide and a positive electrode additive, the positive electrode additive includes a titanium oxide particle having an anatase-type crystal structure, the titanium oxide particle has an average primary particle size of 5 nm or more and 10 nm or less and a BET specific surface area of 230 m2/g or more and 360 m2/g or less, and includes 0.1% by mass or more of niobium, and a rate of addition of the titanium oxide relative to the nickel hydroxide is 0.1% by mass or more and 1.0% by mass or less.

公开(公告)号：US20210305559A1

公开(公告)日：2021-09-30

申请号：US17204714

申请日：2021-03-17

Applicant: FDK CORPORATION

Inventor： Yuya Tanimoto ,  Jun Ishida ,  Tetsuya Yamane ,  Yuzo Imoto

IPC: H01M4/52 ,  H01M4/13 ,  H01M10/30 ,  H01M4/62 ,  H01M4/38

Abstract: A battery includes an outer can, and an electrode group that is accommodated in the outer can together with an alkaline electrolyte solution, in which the electrode group includes a positive electrode and a negative electrode superposed with a separator being interposed therebetween, the positive electrode includes a positive electrode core and a positive electrode mixture packed in the positive electrode core, the positive electrode mixture includes a nickel hydroxide powder that is an aggregate of a particle of nickel hydroxide as a positive electrode active material, and a conductive material, the conductive material is a high-valent cobalt compound provided with a high valence and having a valence of higher than three, the high-valent cobalt compound containing sodium, and the conductive material is in an amount of 0.5 parts by mass or more and 5.0 parts by mass or less based on 100 parts by mass of the positive electrode active material.

公开(公告)号：US20180358609A1

公开(公告)日：2018-12-13

申请号：US16001644

申请日：2018-06-06

Applicant: FDK CORPORATION

Inventor： Tetsuya Yamane ,  Yuya Tanimoto ,  Yuzo Imoto ,  Hideyuki Asanuma

IPC: H01M4/32 ,  H01M10/34 ,  H01M4/52 ,  H01M4/80

CPC classification number: H01M4/32 ,  H01M4/52 ,  H01M4/806 ,  H01M4/808 ,  H01M10/30

Abstract: A nickel hydride secondary battery includes an electrode group including a separator, a positive electrode and a negative electrode. The positive electrode includes a positive electrode body including a positive electrode core member and a positive electrode mixture that is filled in the positive electrode core member, and a surface layer existing on a surface part of the positive electrode body. The positive electrode mixture contains nickel hydroxide as a positive electrode active material, and the surface layer contains nickel.