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    Nonaqueous electrolyte secondary battery
    1.
    发明授权
    Nonaqueous electrolyte secondary battery 有权

    公开(公告)号：US11984618B2

    公开(公告)日：2024-05-14

    申请号：US17979108

    申请日：2022-11-02

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Takanobu Yamada ,  Tetsuya Kaneko

    IPC: H01M4/62 ,  H01M4/13 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/653 ,  H01M50/446 ,  H01M50/46

    CPC classification number: H01M50/46 ,  H01M4/13 ,  H01M4/366 ,  H01M4/628 ,  H01M10/0525 ,  H01M10/653 ,  H01M50/446

    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode collector, a positive electrode active material layer on part of the surface of the positive electrode collector, and an insulating layer on another part of the surface of the positive electrode collector; a negative electrode including a negative electrode collector; and a negative electrode active material layer on part of the surface of the negative electrode collector; a separator that insulates the positive and negative electrodes; and a nonaqueous electrolyte. A width of the negative electrode active material layer is wider than the positive electrode active material layer. The insulating layer protrudes from the negative electrode active material layer; and exhibits a thermal shrinkage factor of 13% or less in a direction parallel to the surface of a square insulating layer sample having a side length of 5 cm and heated at 150° C. for 1 hour.

    Nonaqueous electrolyte secondary battery
    2.
    发明授权
    Nonaqueous electrolyte secondary battery 有权

    公开(公告)号：US11522197B2

    公开(公告)日：2022-12-06

    申请号：US16832037

    申请日：2020-03-27

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Takanobu Yamada ,  Tetsuya Kaneko

    IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/13

    Abstract: An object of the present invention is to provide a nonaqueous electrolyte secondary battery that allows more suitably suppressing short circuits between a positive electrode collector and a negative electrode active material layer, even when the battery generates heat. Provided is a nonaqueous electrolyte secondary battery 1 that includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector, a positive electrode active material layer, and an insulating layer provided on another part of the surface of the positive electrode collector, so as to be adjacent to the positive electrode active material layer. The insulating layer contains an inorganic filler and a binder. A penetration strength of the insulating layer in a thickness direction perpendicular to the surface of the positive electrode collector is 0.05 N/mm2 or higher.

    METHOD OF EVALUATING POWER STORAGE DEVICE, METHOD OF MANUFACTURING POWER STORAGE DEVICE, AND TEST SYSTEM
    5.
    发明申请
    METHOD OF EVALUATING POWER STORAGE DEVICE, METHOD OF MANUFACTURING POWER STORAGE DEVICE, AND TEST SYSTEM 审中-公开

    公开(公告)号：US20190162771A1

    公开(公告)日：2019-05-30

    申请号：US16197571

    申请日：2018-11-21

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Kensaku Miyazawa ,  Shinichi Hamasaki ,  Yuya Ishihara ,  Tetsuya Kaneko

    IPC: G01R31/02 ,  G01R31/3842 ,  G01R31/388 ,  H02J7/00

    Abstract: A method of evaluating a power storage device includes at least [a] to [f] below. [a] A power storage device is prepared. [b] A charge level of the power storage device is adjusted to produce a first potential difference between a positive electrode and a negative electrode. [c] The positive electrode or the negative electrode is selected as a reference electrode. [d] After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. [e] The rod-shaped member is stopped. [f] The power storage device is evaluated based on a state of the power storage device after the rod-shaped member is stopped.

    Nonaqueous electrolyte secondary battery
    9.
    发明授权
    Nonaqueous electrolyte secondary battery 有权

    公开(公告)号：US11522253B2

    公开(公告)日：2022-12-06

    申请号：US16832165

    申请日：2020-03-27

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Takanobu Yamada ,  Tetsuya Kaneko

    IPC: H01M4/13 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/36 ,  H01M50/446 ,  H01M50/46 ,  H01M10/653

    Abstract: An object to provide a nonaqueous electrolyte secondary battery that allows more suitably suppressing short circuits between a positive electrode collector and a negative electrode active material layer, even when the battery generates heat. A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator. The positive electrode includes a positive electrode collector, a positive electrode active material layer, and an insulating layer provided on another part of the surface of the positive electrode collector, adjacent to the positive electrode active material layer. The insulating layer contains an inorganic filler and a binder; and is configure to exhibit a value of 13% or less of a thermal shrinkage factor in a direction parallel to the surface of an evaluation sample of an insulating layer formed to a square shape having a length of each side of 5 cm and heated at 150° C. for 1 hour.

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