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    LITHIUM SECONDARY BATTERY
    1.
    发明申请
    LITHIUM SECONDARY BATTERY 有权

    公开(公告)号：US20240387861A1

    公开(公告)日：2024-11-21

    申请号：US18696465

    申请日：2022-09-22

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Ryohei Miyamae ,  Akira Kano ,  Shinichiro Kondo

    IPC: H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M10/0568 ,  H01M50/414 ,  H01M50/431 ,  H01M50/446 ,  H01M50/451 ,  H01M50/491

    Abstract: A disclosed lithium secondary battery includes a positive electrode (11), a negative electrode (12), a separator (50) disposed between the positive electrode (11) and the negative electrode (12), and a non-aqueous electrolyte having lithium ion conductivity. The negative electrode (12) is an electrode on which lithium metal is deposited during charging and from which the lithium metal dissolves during discharging. The separator (50) includes a substrate (51), a heat-resistant layer (52), and a spacer (53). The heat-resistant layer (52) is formed on at least one main surface selected from two main surfaces of the substrate (51). The spacer (53) is disposed on the negative electrode (12) side with respect to the substrate (51) and the heat-resistant layer (52). An average height of the spacer (53) is larger than a sum of an average thickness of the substrate and an average thickness of the heat-resistant layer.

    Lithium secondary battery incuding nonaqueous electrolyte having lithium-ion conductivity
    2.
    发明授权
    Lithium secondary battery incuding nonaqueous electrolyte having lithium-ion conductivity 有权

    公开(公告)号：US10978692B2

    公开(公告)日：2021-04-13

    申请号：US16386758

    申请日：2019-04-17

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Akira Kano ,  Ryohei Miyamae ,  Kiyohiro Isii ,  Kensuke Nakura

    IPC: H01M4/131 ,  H01M4/134 ,  H01M4/66 ,  H01M4/70 ,  H01M10/0525 ,  H01M4/02

    Abstract: A lithium secondary battery includes an electrode group and a nonaqueous electrolyte having lithium ion conductivity. A negative electrode includes a negative electrode current collector. The negative electrode current collector has a first surface facing an outward direction of winding of the electrode group and a second surface facing an inward direction of the winding of the electrode group. Lithium metal is deposited on the first surface and the second surface by charge. The negative electrode further includes first protrusions protruding from the first surface and second protrusions protruding from the second surface. A ratio A1X/A1 is less than a ratio A2X/A2. A1X is a sum of projected areas of the first protrusions on the first surface. A1 is an area of the first surface. A2X is a sum of projected areas of the second protrusions on the second surface. A2 is an area of the second surface.

    LITHIUM SECONDARY BATTERY
    4.
    发明申请
    LITHIUM SECONDARY BATTERY 有权

    公开(公告)号：US20240429562A1

    公开(公告)日：2024-12-26

    申请号：US18694576

    申请日：2022-09-22

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Ryohei Miyamae ,  Akira Kano ,  Shinichiro Kondo

    IPC: H01M50/474 ,  H01M10/052 ,  H01M50/431 ,  H01M50/443 ,  H01M50/46

    Abstract: A disclosed lithium secondary battery includes a positive electrode (11), a negative electrode (12), a separator (50) disposed between the positive electrode (11) and the negative electrode (12), and a non-aqueous electrolyte having lithium ion conductivity. The negative electrode (12) is an electrode on which lithium metal is deposited during charging and from which the lithium metal dissolves during discharging. The separator (50) includes a substrate (51) and a spacer (53). The spacer (53) is disposed on the negative electrode (12) side with respect to the substrate (51). The spacer (53) includes line-shaped protrusions arranged in a mesh pattern. The mesh pattern includes a lacking part connecting regions within adjacent meshes.

    SECONDARY BATTERY CHARGING METHOD AND CHARGING SYSTEM
    5.
    发明公开
    SECONDARY BATTERY CHARGING METHOD AND CHARGING SYSTEM 审中-公开

    公开(公告)号：US20240128780A1

    公开(公告)日：2024-04-18

    申请号：US18274342

    申请日：2022-01-21

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Ryohei Miyamae ,  Akira Kano ,  Takahiro Fukuoka

    IPC: H02J7/00 ,  H01M10/052 ,  H01M10/44 ,  H01M10/46

    CPC classification number: H02J7/00712 ,  H01M10/052 ,  H01M10/44 ,  H01M10/46 ,  H02J7/0048

    Abstract: A method of charging a secondary battery, the battery including a positive electrode in which a lithium ion is stored during discharging and released during charging, a negative electrode in which a lithium metal deposits during charging and dissolves during discharging, and a non-aqueous electrolyte having a lithium ion conductivity, wherein the method includes a step of charging the secondary battery according to a first charging profile. In the secondary battery, a surface of the negative electrode is covered with a protection layer. In the first charging profile, charging starts from a first charging step in which charging is performed at a constant current with a first electric current density I1, and following the first charging step, a second charging step is performed in which charging is performed at a constant current with a second electric current density I2 that is larger than the first electric current density I1.

    SECONDARY BATTERY AND METHOD FOR PRODUCING SECONDARY BATTERY
    7.
    发明申请
    SECONDARY BATTERY AND METHOD FOR PRODUCING SECONDARY BATTERY 有权

    公开(公告)号：US20250141051A1

    公开(公告)日：2025-05-01

    申请号：US18835506

    申请日：2023-02-08

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Rikiya Okimoto ,  Ryohei Miyamae

    IPC: H01M50/491 ,  H01M10/052 ,  H01M10/0587 ,  H01M50/403 ,  H01M50/449

    Abstract: A secondary battery includes a positive plate, a negative plate, a porous separator, and a non-aqueous electrolyte. In the secondary battery, lithium metal deposits on the negative plate during charging, and lithium metal dissolves in the non-aqueous electrolyte during discharge. The secondary battery includes: a spacer interposed between at least one of electrode plates of the negative plate and the positive plate and the separator to form a space between the electrode plate and the separator; and a low porosity portion that has a smaller porosity than the separator and that is fitted into the separator in an area where the separator and the spacer overlap when viewed from a laminating direction of the separator and the electrode plate.

    LITHIUM SECONDARY BATTERY
    9.
    发明申请
    LITHIUM SECONDARY BATTERY 有权

    公开(公告)号：US20220407047A1

    公开(公告)日：2022-12-22

    申请号：US17638545

    申请日：2020-07-28

    Applicant: Panasonic Intellectual Property Management Co. Ltd.

    Inventor： Akira Kano ,  Ryohei Miyamae

    IPC: H01M4/134 ,  H01M4/62 ,  H01M10/0569 ,  H01M10/0525

    Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a lithium ion conductive nonaqueous electrolyte, and a separator disposed between the positive electrode and the negative electrode. On the negative electrode, lithium metal deposits during charging, and the lithium metal is dissolved during discharging; the negative electrode includes a negative electrode current collector, and a plurality of layers stacked on the negative electrode current collector; the plurality of layers include a first layer, a second layer, and a third layer; of the first to third layers, the first layer is closest to the negative electrode current collector, and the third layer is farthest from the negative electrode current collector; the first layer contains a material capable of storing lithium ions; the second layer contains lithium metal, and the third layer has an insulation property and a lithium ion permeability.

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