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    COIN-SHAPED LITHIUM SECONDARY BATTERY AND IoT DEVICE
    1.
    发明申请
    COIN-SHAPED LITHIUM SECONDARY BATTERY AND IoT DEVICE 有权

    公开(公告)号：US20210043919A1

    公开(公告)日：2021-02-11

    申请号：US17070193

    申请日：2020-10-14

    申请人： NGK INSULATORS, LTD.

    发明人： Yukinobu YURA ,  Kazuki MAEDA ,  Shunsuke MIZUKAMI

    IPC分类号： H01M4/131 ,  H01M4/66 ,  H01M4/134 ,  H01M4/525 ,  H01M4/04 ,  H01M10/0525 ,  H01M2/16

    摘要： Provided is a coin-shaped lithium secondary battery including a positive electrode plate which is a lithium complex oxide sintered plate; a negative electrode plate which is a titanium-containing sintered plate; a separator interposed between the positive electrode plate and the negative electrode plate; an electrolytic solution with which the positive electrode plate, the negative electrode, and the separator are impregnated; and an exterior body having a closed space, the closed space accommodating the positive electrode plate, the negative electrode plate, the separator, and the electrolytic solution, the lithium secondary battery having a thickness of 0.7 to 1.6 mm and a diameter of 10 to 20 mm.

    LITHIUM ION SECONDARY BATTERY
    6.
    发明公开
    LITHIUM ION SECONDARY BATTERY 审中-公开

    公开(公告)号：US20230198110A1

    公开(公告)日：2023-06-22

    申请号：US18171863

    申请日：2023-02-21

    申请人： NGK INSULATORS, LTD.

    发明人： Yukinobu YURA ,  Kengo OISHI ,  Shunsuke MIZUKAMI

    IPC分类号： H01M50/54 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/38 ,  H01M50/434 ,  H01M50/109

    CPC分类号： H01M50/54 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/38 ,  H01M50/434 ,  H01M50/109 ,  H01M2004/021

    摘要： Provided is a lithium ion secondary battery including (a) a unit cell including a positive electrode layer composed of a lithium complex oxide sintered body, a negative electrode layer composed of a titanium-containing sintered body, a ceramic separator interposed therebetween, and an electrolyte, (b) a current collecting layer on each of both sides or the surface on the negative electrode layer side of the unit cell, and (c) an exterior body including a closed space, which accommodates the unit cell. The positive electrode layer, the ceramic separator, the negative electrode layer, and the current collecting layer form one integrated sintered body as a whole, whereby these components are bonded together, and in cross-sectional observation of the interface between the current collecting layer and the negative electrode layer, the proportion of the region in which these layers are in direct contact at the interface is 45 to 90%.

    LITHIUM SECONDARY BATTERY AND METHOD FOR MEASURING STATE OF CHARGE OF SAME
    7.
    发明申请
    LITHIUM SECONDARY BATTERY AND METHOD FOR MEASURING STATE OF CHARGE OF SAME 有权

    公开(公告)号：US20220238870A1

    公开(公告)日：2022-07-28

    申请号：US17658694

    申请日：2022-04-11

    申请人： NGK INSULATORS, LTD.

    发明人： Yukinobu YURA ,  Shigeki OKADA ,  Shunsuke MIZUKAMI

    IPC分类号： H01M4/485 ,  H01M4/525 ,  H01M10/0525

    摘要： Provided is a lithium secondary battery including a positive electrode layer composed of a lithium complex oxide sintered body and having a thickness of 70 μm or more; a negative electrode layer composed of a titanium-containing sintered body and having a thickness of 70 μm or more; a separator interposed between the positive electrode layer and the negative electrode layer; an electrolyte with which at least the separator is impregnated; and an outer package comprising a closed space, the closed space accommodating the positive electrode layer, the negative electrode layer, the separator, and the electrolyte, wherein the lithium secondary battery has a property that the resistance value decreases as the state of charge (SOC) increases from 10% to 80%.

    CIRCUIT BOARD ASSEMBLY
    8.
    发明申请
    CIRCUIT BOARD ASSEMBLY 有权

    公开(公告)号：US20210184269A1

    公开(公告)日：2021-06-17

    申请号：US17188212

    申请日：2021-03-01

    申请人： NGK INSULATORS, LTD.

    发明人： Yukinobu YURA ,  Kazuki MAEDA ,  Shunsuke MIZUKAMI

    IPC分类号： H01M10/42 ,  H01M10/0525 ,  H01M10/0585 ,  H01M10/04 ,  H01M4/131 ,  H01M4/485 ,  H01M50/109 ,  H05K1/18

    摘要： A circuit board assembly includes a wiring board, a coin-type secondary cell that is a lithium secondary cell electrically connected to the wiring board by reflow soldering, and a wireless communication device electrically connected to the wiring board. The coin-type secondary cell includes a positive electrode including a sintered body, a negative electrode including a sintered body, an electrolyte layer provided between the positive electrode and the negative electrode, and a cell case having an enclosed space in which the positive electrode, the negative electrode, and the electrolyte layer are housed. When C is given as the capacity of the positive electrode and A is given as the capacity of the negative electrode, 1.03