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    Cathode material for secondary battery and manufacturing method of the same
    7.
    发明授权
    Cathode material for secondary battery and manufacturing method of the same 有权
    二次电池用阴极材料及其制造方法

    公开(公告)号：US08906254B2

    公开(公告)日：2014-12-09

    申请号：US13484715

    申请日：2012-05-31

    申请人： Sa Heum Kim ,  Dong Gun Kim ,  Young Jun Kim ,  Jun Ho Song ,  Woo Suk Cho ,  Jeom Soo Kim ,  Dong Jin Kim

    发明人： Sa Heum Kim ,  Dong Gun Kim ,  Young Jun Kim ,  Jun Ho Song ,  Woo Suk Cho ,  Jeom Soo Kim ,  Dong Jin Kim

    IPC分类号： H01M4/88

    CPC分类号： C01B25/45 ,  C01B25/455

    摘要： Disclosed are a cathode material for a secondary battery, and a manufacturing method of the same. The cathode material includes a lithium manganese phosphate LiMnPO4/sodium manganese fluorophosphate Na2MnPO4F composite, in which the LiMnPO4 and Na2MnPO4F have different crystal structures. Additionally, the method of manufacturing the cathode material may be done in a single step through a hydrothermal synthesis, which greatly reduces the time and cost of production. Additionally, the disclosure provides that the electric conductivity of the cathode material may be improved through carbon coating, thereby providing a cathode material with excellent electrochemical activity.

    摘要翻译： 公开了二次电池用阴极材料及其制造方法。 正极材料包括磷酸锰锂LiMnPO4 /锰锰磷酸钠Na2MnPO4F复合材料，其中LiMnPO4和Na2MnPO4F具有不同的晶体结构。 此外，制造阴极材料的方法可以通过水热合成的一个步骤进行，这大大降低了生产的时间和成本。 此外，本公开内容提供了通过碳涂覆可以改善阴极材料的电导率，从而提供具有优异的电化学活性的阴极材料。

    METHOD OF PREPARING SPHERICAL SHAPE POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY
    9.
    发明申请
    METHOD OF PREPARING SPHERICAL SHAPE POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY 审中-公开
    用于锂二次电池制备球形形状活性物质的方法

    公开(公告)号：US20100136433A1

    公开(公告)日：2010-06-03

    申请号：US12486938

    申请日：2009-06-18

    申请人： Kyung Su Kim ,  Sa Heum Kim ,  Dong Gun Kim ,  Young Jun Kim ,  Jun Ho Song

    发明人： Kyung Su Kim ,  Sa Heum Kim ,  Dong Gun Kim ,  Young Jun Kim ,  Jun Ho Song

    IPC分类号： H01M4/58 ,  H01B1/12

    CPC分类号： H01M4/5825 ,  H01M4/621 ,  H01M4/623 ,  H01M4/625 ,  H01M10/052

    摘要： The present invention relates to a process of preparing a spherically-shaped positive active material for a lithium secondary battery, comprising: (a) uniformly dissolving a raw material mixture comprising a lithium-based compound, a transition metal, phosphate-based compound and a carbon source in deionized water; (b) preparing a high density spherically-shaped precursor by rapidly freezing the mixed solution in a freeze granulator and sublimating the frozen mixed solution; and (c) thermally treating the high density spherically-shaped precursor.The thus-prepared spherically-shaped positive active material is superior in crystallinity and electric conductivity, thus being useful in the manufacture of an electrode for a lithium secondary battery.

    摘要翻译： 本发明涉及一种锂二次电池用球形正极活性物质的制备方法，其特征在于，包括：（a）将包含锂基化合物，过渡金属，磷酸酯系化合物和 去离子水中的碳源; （b）通过在冷冻造粒机中快速冷冻混合溶液并升华冷冻混合溶液来制备高密度球形前体; 和（c）热处理高密度球形前体。 由此制备的球形正极活性物质的结晶性和导电性优异，因此可用于锂二次电池用电极的制造。

    Arc free phase control alternatives for AC motor starters
    10.
    发明授权
    Arc free phase control alternatives for AC motor starters 有权

    公开(公告)号：US10320313B2

    公开(公告)日：2019-06-11

    申请号：US14643093

    申请日：2015-03-10

    申请人： Young Jun Kim

    发明人： Young Jun Kim

    IPC分类号： H02P25/14 ,  H02P1/24 ,  H02P6/16 ,  H02P1/04 ,  H02P27/02

    摘要： An arc-free phase control circuit for an AC motor that brings about an energy saving effect according to a load change and operates efficiently in terms of cost reduction while securing electrical stability by virtue of an overload protection function. The circuit includes a first relay, a TRIAC, a second relay, a voltage sensing unit, a current sensing unit, a speed voltage sensing unit, a zero-cross point detection unit, and a controller.