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    FADE-RESISTANT HIGH CAPACITY ELECTRODES FOR A LITHIUM-ION BATTERY
    1.
    发明申请
    FADE-RESISTANT HIGH CAPACITY ELECTRODES FOR A LITHIUM-ION BATTERY 审中-公开
    用于锂离子电池的抗阻抗高容量电极

    公开(公告)号：US20150144494A1

    公开(公告)日：2015-05-28

    申请号：US14612454

    申请日：2015-02-03

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Mark W. Verbrugge ,  Sampath K. Vanimisetti ,  Ramakrishnan Narayanrao

    IPC: H01M4/36 ,  H01M4/134 ,  H01M4/38 ,  H01M4/13

    CPC classification number: H01M4/366 ,  H01M4/13 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/386 ,  H01M4/387 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/021 ,  Y02E60/122 ,  Y02T10/7011

    Abstract: The gravimetric and volumetric efficiency of lithium ion batteries may be increased if higher capacity materials like tin and silicon are substituted for carbon as the lithium-accepting host in the negative electrode of the battery. But both tin and silicon, when fully charged with lithium, undergo expansions of up to 300% and generate appreciable internal stresses. These internal stresses, which will develop on each discharge-charge cycle, may lead to a progressive reduction in battery capacity, also known as battery fade. The effects of the internal stresses may be significantly reduced by partially embedding tin or silicon nanowires in the current collector. Additional benefit may be obtained if a 5 to 50% portion of the nanowire length at its embedded end are coated or masked with a composition which impedes lithium diffusion. Methods for embedding and masking the nanowires are described.

    Abstract translation: 如果更高容量的材料如锡和硅取代碳作为电池负极中的锂接受主体，锂离子电池的重量和体积效率可能会增加。 但是，当完全充满锂时，锡和硅都经历300％的膨胀并产生明显的内应力。 这些在每个放电 - 充电循环中产生的内部应力可能导致电池容量的逐渐减小，也称为电池褪色。 通过在集电器中部分地嵌入锡或硅纳米线，可以显着降低内部应力的影响。 如果其嵌入端的纳米线长度的5至50％部分用阻止锂扩散的组合物涂覆或掩蔽，则可获得额外的益处。 描述了嵌入和掩蔽纳米线的方法。

    WELDING ELECTRODE AND METHOD OF FORMING A RESISTANCE SPOT WELD JOINT
    2.
    发明申请
    WELDING ELECTRODE AND METHOD OF FORMING A RESISTANCE SPOT WELD JOINT 有权
    焊接电极及其形成电阻点焊接头的方法

    公开(公告)号：US20140319105A1

    公开(公告)日：2014-10-30

    申请号：US14305461

    申请日：2014-06-16

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Sampath K. Vanimisetti ,  David R. Sigler

    IPC: B23K11/11

    CPC classification number: B23K11/115 ,  B23K11/3018 ,  B23K35/0205 ,  B23K35/0261

    Abstract: A welding electrode includes an electrode holder and an electrode cap removably attached to the holder and having a central longitudinal axis. The cap includes a body having an end, and a welding surface that is substantially smooth and free from any grooves defined therein, and has a first diameter of from about 7 to 10 mm, a first radius of curvature, and a second radius of curvature that is different from the first radius. The cap includes a skirt portion extending away from the body and configured to bear against the holder. The skirt portion has a first face that is substantially parallel to the axis and spaced apart from the surface. The body has a second face interconnecting the first face and the surface, and the body tapers from the first face to the surface. A method of forming a resistance spot weld joint is also disclosed.

    Abstract translation: 焊接电极包括电极保持器和可拆卸地附接到保持器并具有中心纵向轴线的电极帽。 盖包括具有端部的主体和基本上平滑且没有限定在其中的任何凹槽的焊接表面，并且具有约7至10mm的第一直径，第一曲率半径和第二曲率半径 这与第一个半径不同。 盖子包括一个远离主体延伸的裙部，并被配置为承受支架。 裙部具有基本上平行于轴线并与表面间隔开的第一面。 主体具有互连第一面和表面的第二面，并且本体从第一面到表面逐渐变细。 还公开了形成电阻点焊接头的方法。

    Fade-resistant high capacity electrodes for a lithium-ion battery
    4.
    发明授权
    Fade-resistant high capacity electrodes for a lithium-ion battery 有权
    用于锂离子电池的防褪色高容量电极

    公开(公告)号：US09118073B2

    公开(公告)日：2015-08-25

    申请号：US14612454

    申请日：2015-02-03

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Mark W. Verbrugge ,  Sampath K. Vanimisetti ,  Ramakrishnan Narayanrao

    IPC: H01M4/36 ,  H01M4/13 ,  H01M4/134 ,  H01M4/38 ,  H01M4/02

    CPC classification number: H01M4/366 ,  H01M4/13 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/386 ,  H01M4/387 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/021 ,  Y02E60/122 ,  Y02T10/7011

    Abstract: The gravimetric and volumetric efficiency of lithium ion batteries may be increased if higher capacity materials like tin and silicon are substituted for carbon as the lithium-accepting host in the negative electrode of the battery. But both tin and silicon, when fully charged with lithium, undergo expansions of up to 300% and generate appreciable internal stresses. These internal stresses, which will develop on each discharge-charge cycle, may lead to a progressive reduction in battery capacity, also known as battery fade. The effects of the internal stresses may be significantly reduced by partially embedding tin or silicon nanowires in the current collector. Additional benefit may be obtained if a 5 to 50% portion of the nanowire length at its embedded end are coated or masked with a composition which impedes lithium diffusion. Methods for embedding and masking the nanowires are described.

    Abstract translation: 如果更高容量的材料如锡和硅取代碳作为电池负极中的锂接受主体，锂离子电池的重量和体积效率可能会增加。 但是，当完全充满锂时，锡和硅都经历300％的膨胀并产生明显的内应力。 这些在每个放电 - 充电循环中产生的内部应力可能导致电池容量的逐渐减小，也称为电池褪色。 通过在集电器中部分地嵌入锡或硅纳米线，可以显着降低内部应力的影响。 如果其嵌入端的纳米线长度的5至50％部分用阻止锂扩散的组合物涂覆或掩蔽，则可获得额外的益处。 描述了嵌入和掩蔽纳米线的方法。

    Welding electrode and method of forming a resistance spot weld joint
    5.
    发明授权
    Welding electrode and method of forming a resistance spot weld joint 有权

    公开(公告)号：US09662738B2

    公开(公告)日：2017-05-30

    申请号：US14305461

    申请日：2014-06-16

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Sampath K. Vanimisetti ,  David R. Sigler

    IPC: B23K11/00 ,  B23K11/11 ,  B23K11/30 ,  B23K35/02

    CPC classification number: B23K11/115 ,  B23K11/3018 ,  B23K35/0205 ,  B23K35/0261

    Abstract: A welding electrode includes an electrode holder and an electrode cap removably attached to the holder and having a central longitudinal axis. The cap includes a body having an end, and a welding surface that is substantially smooth and free from any grooves defined therein, and has a first diameter of from about 7 to 10 mm, a first radius of curvature, and a second radius of curvature that is different from the first radius. The cap includes a skirt portion extending away from the body and configured to bear against the holder. The skirt portion has a first face that is substantially parallel to the axis and spaced apart from the surface. The body has a second face interconnecting the first face and the surface, and the body tapers from the first face to the surface. A method of forming a resistance spot weld joint is also disclosed.

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