公开(公告)号：US10374260B2

公开(公告)日：2019-08-06

申请号：US15698504

申请日：2017-09-07

Applicant: FDK CORPORATION

Inventor： Tomomi Nakamura ,  Hiroyuki Shibaoka ,  Tetsu Yamanaka ,  Isao Mugima ,  Hidefumi Isaji ,  Hideyuki Asanuma

IPC: H01M10/0525 ,  H01M10/24 ,  H01M4/24 ,  H01M10/28 ,  H01M2/20 ,  H01M2/26 ,  H01M10/0587

Abstract: A nickel-hydrogen secondary battery includes: an outer can; a sealing body including a positive electrode terminal, the sealing body sealing an opening of the outer can; an electrode group formed by placing a positive electrode and a negative electrode on top of each other with a separator therebetween and spirally winding the positive electrode and the negative electrode, the electrode group housed in the outer can along with an alkaline electrolyte; a positive electrode current collector connected to positive electrode connection edge portion protruding from one end surface of the electrode group; and a current collecting lead connecting the positive electrode current collector and the sealing body, wherein a relationship between a deformation resistance A of a material a and a deformation resistance B of a material b satisfies a relationship of A

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：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.

公开(公告)号：US20180069268A1

公开(公告)日：2018-03-08

申请号：US15698504

申请日：2017-09-07

Applicant: FDK CORPORATION

Inventor： Tomomi Nakamura ,  Hiroyuki Shibaoka ,  Tetsu Yamanaka ,  Isao Mugima ,  Hidefumi Isaji ,  Hideyuki Asanuma

IPC: H01M10/24 ,  H01M4/24 ,  H01M10/28

CPC classification number: H01M10/24 ,  H01M2/202 ,  H01M2/263 ,  H01M4/24 ,  H01M10/0587 ,  H01M10/283

Abstract: A nickel-hydrogen secondary battery includes: an outer can; a sealing body including a positive electrode terminal, the sealing body sealing an opening of the outer can; an electrode group formed by placing a positive electrode and a negative electrode on top of each other with a separator therebetween and spirally winding the positive electrode and the negative electrode, the electrode group housed in the outer can along with an alkaline electrolyte; a positive electrode current collector connected to positive electrode connection edge portion protruding from one end surface of the electrode group; and a current collecting lead connecting the positive electrode current collector and the sealing body, wherein a relationship between a deformation resistance A of a material a and a deformation resistance B of a material b satisfies a relationship of A

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.