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    Parameter search method
    21.
    发明授权
    Parameter search method 有权

    公开(公告)号：US11934759B2

    公开(公告)日：2024-03-19

    申请号：US17424043

    申请日：2020-02-04

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Teppei Oguni ,  Takeshi Osada ,  Takahiro Fukutome

    IPC: G06F7/50 ,  G06F30/367 ,  G06N3/042 ,  G06N3/08

    CPC classification number: G06F30/367 ,  G06N3/042 ,  G06N3/08

    Abstract: A parameter candidate for a semiconductor element is provided. A data set of measurement data is provided to a parameter extraction portion, and a model parameter is extracted. A first netlist is provided to a circuit simulator, simulation is performed using the first netlist and the model parameter, and a first output result is output. A classification model learns the model parameter and the first output result and classifies the model parameter. A second netlist and a model parameter are provided to the circuit simulator. A variable to be adjusted is supplied to a neural network, an action value function is output, and the variable is updated. The circuit simulator performs simulation using the second netlist and the model parameter. When a second output result to be output does not satisfy conditions, a weight coefficient of the neural network is updated. When the second output result satisfies the conditions, the variable is judged to be the best candidate.

    Power storage device and manufacturing method thereof
    22.
    发明授权
    Power storage device and manufacturing method thereof 有权

    公开(公告)号：US11355784B2

    公开(公告)日：2022-06-07

    申请号：US16662083

    申请日：2019-10-24

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Teppei Oguni ,  Junya Goto ,  Ai Nakagawa

    IPC: H01M10/058 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/44

    Abstract: In initial charge and discharge, decomposition products or a gas is generated, degrading a battery. At least one of solvents (e.g., ethylene carbonate) used for an electrolytic solution is brought into contact with a positive electrode and a negative electrode and then charge is performed to some degree, and after that, a different solvent or electrolytic solution (e.g., ethyl methyl carbonate or vinylene carbonate) was added to adjust the electrolytic solution and then charge is performed. Through this process, stable coating films are formed in initial charge and discharge, which stably inhibits a side reaction between the electrolytic solution and an active material.

    Driving method of electrochemical device
    28.
    发明授权
    Driving method of electrochemical device 有权

    公开(公告)号：US09787126B2

    公开(公告)日：2017-10-10

    申请号：US14173029

    申请日：2014-02-05

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Shunpei Yamazaki ,  Teppei Oguni

    IPC: H02J7/00

    CPC classification number: H02J7/0093 ,  H02J7/0075

    Abstract: When a hole in a separator is clogged, the cycle characteristics of a battery might be lowered and the internal resistance of a battery might be increased to reduce the output. Thus, a means for suppression of or recovery from degradation due to a clogged separator in a battery such as a lithium-ion secondary battery is provided. When reverse pulse current is supplied multiple times during charge, a separator is prevented from being clogged and a voltage increase (increase in internal resistance) during charge is suppressed, so that charge can be normally performed repeatedly.

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