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    BATTERY AND MANUFACTURING METHOD FOR BATTERY
    1.
    发明公开
    BATTERY AND MANUFACTURING METHOD FOR BATTERY 审中-公开

    公开(公告)号：US20240347865A1

    公开(公告)日：2024-10-17

    申请号：US18682759

    申请日：2022-03-31

    申请人： VEHICLE ENERGY JAPAN INC.

    发明人： Hiroaki Egawa

    IPC分类号： H01M50/477 ,  H01M50/103 ,  H01M50/15 ,  H01M50/474 ,  H01M50/538 ,  H01M50/54 ,  H01M50/627

    CPC分类号： H01M50/477 ,  H01M50/103 ,  H01M50/15 ,  H01M50/474 ,  H01M50/538 ,  H01M50/54 ,  H01M50/627

    摘要： A battery includes a charge/discharge body including an electrode including an electrode tab, a cover that faces a side section of the charge/discharge body, from which the electrode tab projects, and covers and insulates the charge/discharge body, and a container that houses the charge/discharge body covered by the cover and has conductivity. The cover includes a main body section that covers the side section of the charge/discharge body, an insertion section formed in a cutout shape including an opening at an outer edge of the main body section, the electrode tab being inserted into the insertion section, and a wall section that extends in a direction further away from the side section than the main body section and separates an inner surface of the container and the insertion section.

    Battery status estimation apparatus and battery control apparatus
    2.
    发明授权
    Battery status estimation apparatus and battery control apparatus 有权

    公开(公告)号：US12117497B2

    公开(公告)日：2024-10-15

    申请号：US17264440

    申请日：2019-03-18

    申请人： Vehicle Energy Japan Inc.

    发明人： Yosuke Wada ,  Keiichiro Ohkawa

    IPC分类号： G01R31/3842 ,  G01R31/367 ,  G01R31/388 ,  G01R31/396 ,  H01M10/48 ,  H02J7/00

    CPC分类号： G01R31/3842 ,  G01R31/367 ,  G01R31/388 ,  G01R31/396 ,  H01M10/48 ,  H02J7/0049 ,  H02J2310/48

    摘要： An apparatus coupled to an assembled battery with a plurality of serially-connected cells and for setting any one of the plurality of cells as a target cell and estimating a state of charge of the target cell includes: a cell voltage acquisition unit that acquires a measurement result of a closed circuit voltage of the target cell; a reference cell information acquisition unit that sets a reference cell with respect to the plurality of cells and acquires a closed circuit voltage and an open circuit voltage of the reference cell and a reference SOC value representing a state of charge of the reference cell; a temporary SOC operation unit that finds a temporary SOC value representing a temporary state of charge of the target cell on the basis of the closed circuit voltage of the target cell and the closed circuit voltage and the open circuit voltage of the reference cell; and an SOC operation unit that finds an SOC value representing the state of charge of the target cell by using a result of smoothing processing executed on a difference between the temporary SOC value and the reference SOC value.

    Battery control device
    4.
    发明授权
    Battery control device 有权

    公开(公告)号：US12038483B2

    公开(公告)日：2024-07-16

    申请号：US17284618

    申请日：2019-09-25

    申请人： Vehicle Energy Japan Inc.

    发明人： Miyuki Akatsu ,  Keiichiro Ohkawa

    IPC分类号： G01R31/3842 ,  G01R31/36 ,  G01R31/3828 ,  G01R31/388 ,  H01M10/48 ,  H02J7/00

    CPC分类号： G01R31/3842 ,  G01R31/3648 ,  G01R31/388 ,  H01M10/48 ,  H01M10/482 ,  H02J7/0013 ,  G01R31/3828

    摘要： A battery control unit has an SOCv operation unit which calculates a state of charge SOCv based on voltage of a battery, a ΔSOCi operation unit which calculates an amount of change ΔSOCi of the state of charge based on current value of the battery, a weight operation unit which calculates a weight W, and an SOCc operation unit which calculates a final SOC (SOCc) based on the SOCv, the ΔSOCi and the weight W. Terms forming an operational expression of the SOCc are retained, by using a determination threshold, as a sum SOCc_Big of terms of a large value group and a sum SOCc_Small of terms of a small value group, and used in calculating the SOCc of a subsequent operation period. By using the SOCc_Big and the SOCc_Small, it is possible to prevent the accumulation of errors caused by information loss that occurred when repeatedly operating the SOCc.

    Positive electrode for lithium ion secondary cell, and lithium ion secondary cell using same
    10.
    发明授权
    Positive electrode for lithium ion secondary cell, and lithium ion secondary cell using same 有权

    公开(公告)号：US11594724B2

    公开(公告)日：2023-02-28

    申请号：US16954285

    申请日：2018-11-19

    申请人： VEHICLE ENERGY JAPAN INC.

    发明人： Yuki Takei ,  Shuichi Suzuki ,  Takeshi Miki ,  Hironori Sasaki

    IPC分类号： H01M4/36 ,  H01M4/13 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

    摘要： Provided is a positive electrode for lithium ion secondary cell that includes an electrolyte holding layer excellent in electron conductivity, and a lithium ion secondary cell using the same. The present invention relates to a positive electrode for lithium ion secondary cell that includes a positive electrode current collector foil and positive electrode mixture layers laminated on both surfaces of the positive electrode current collector foil. The positive electrode mixture layer includes a first positive electrode active material layer, an electrolyte holding layer, and a second positive electrode active material layer. The first positive electrode active material layer, the electrolyte holding layer, and the second positive electrode active material layer contain positive electrode active materials, binders, and conductive agents containing carbonaceous material. A conductive agent ratio of the electrolyte holding layer is higher than conductive agent ratios of the first positive electrode active material layer and the second positive electrode active material layer. A positive electrode active material ratio and a binder ratio of the electrolyte holding layer are lower than positive electrode active material ratios and binder ratios of the first positive electrode active material layer and the second positive electrode active material layer.