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    BATTERY
    2.
    发明申请
    BATTERY 有权

    公开(公告)号：US20250105291A1

    公开(公告)日：2025-03-27

    申请号：US18773889

    申请日：2024-07-16

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Takuya ISHIMOTO ,  Shotaro MURATSUBAKI ,  Naoto OKUZAWA ,  Tatsuyoshi TAKAHASHI ,  Masayuki KIMURA ,  Kazutaka KURIKI

    IPC: H01M4/587 ,  H01M4/02 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

    Abstract: To provide a battery having excellent charge-discharge characteristics even in a low-temperature environment. The battery includes a positive electrode, a negative electrode, an electrolyte solution, and a separator. The electrolyte solution and the separator are included between the positive electrode and the negative electrode; the negative electrode includes a carbon material; and the electrolyte solution includes a lithium salt, a potassium salt, a fluorinated cyclic carbonate, a fluorinated linear carbonate, and at least one kind of anion. The carbon material includes graphite; the lithium salt includes LiPF6; the potassium salt includes KFSI; the fluorinated cyclic carbonate includes fluoroethylene carbonate; and the fluorinated linear carbonate includes methyl trifluoropropionate.

    STORAGE BATTERY AND VEHICLE INCLUDING STORAGE BATTERY
    6.
    发明申请
    STORAGE BATTERY AND VEHICLE INCLUDING STORAGE BATTERY 有权

    公开(公告)号：US20220173429A1

    公开(公告)日：2022-06-02

    申请号：US17530763

    申请日：2021-11-19

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Masayuki KIMURA ,  Kaori OGITA ,  Fumiko TANAKA ,  Shotaro MURATSUBAKI

    IPC: H01M10/0525 ,  H01M4/525 ,  H01M10/0569 ,  H01M10/0568

    Abstract: A storage battery that is less likely to be affected by the ambient temperature is provided. A storage battery that can be charged and discharged at low temperatures is provided. In the storage battery, a secondary battery that can be charged and discharged at low temperatures is provided adjacent to a general secondary battery. The storage battery having such a structure can use, as an internal heat source in a low temperature environment, heat generated by charging and discharging of the secondary battery that can be charged and discharged at low temperatures. Specifically, the storage battery includes a first lithium-ion secondary battery and a second lithium-ion secondary battery adjacent to each other. The first lithium-ion secondary battery contains at least one of an ionic liquid, a molecular crystalline electrolyte, a semi-solid-state electrolyte, an all-solid-state electrolyte, and lithium titanate. The second lithium-ion secondary battery contains an organic electrolyte solution.

    BATTERY
    10.
    发明公开
    BATTERY 审中-公开

    公开(公告)号：US20230402601A1

    公开(公告)日：2023-12-14

    申请号：US18326655

    申请日：2023-05-31

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Shunpei YAMAZAKI ,  Shotaro MURATSUBAKI ,  Takayuki IKEDA

    IPC: H01M4/525 ,  H01M4/1315

    CPC classification number: H01M4/525 ,  H01M4/1315 ,  H01M2004/028

    Abstract: To provide a high-safety battery. The battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and an electrolyte solution. The positive electrode active material includes a first region and a second region. The first region contains cobalt, magnesium, fluorine, and oxygen. The second region contains cobalt and oxygen. The first region is closer to a surface of the positive electrode active material than the second region is. The negative electrode active material contains graphite. The electrolyte solution contains a mixed organic solvent. When the battery in a fully charged state undergoes a nail penetration test in which the nail diameter is 3 mm and the nail penetration speed is 5 mm/sec, the voltage of the battery decreases from a first voltage Vb to a second voltage Vc and then exceeds the second voltage Vc.

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