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    BATTERY AND BATTERY MODULE
    2.
    发明申请
    BATTERY AND BATTERY MODULE 审中-公开

    公开(公告)号：US20190181392A1

    公开(公告)日：2019-06-13

    申请号：US16322988

    申请日：2017-07-05

    申请人： NEC ENERGY DEVICES, LTD.

    发明人： Hiroo TAKAHASHI

    IPC分类号： H01M2/02 ,  H01M2/18 ,  H01M4/587 ,  H01M10/0585 ,  H01M4/485

    摘要： In order to provide a battery having excellent vibration resistance and shock resistance, the battery according to the present invention includes an electrode laminated body 60 formed by laminating a positive electrode 20, a negative electrode 30, and a separator 40 and a laminate film exterior material 80 that houses the electrode laminated body 60 and an electrolytic solution. The static friction coefficient between the negative electrode 30 and the inner surface of the laminate film exterior material 80 is 0.1 or larger.

    LITHIUM ION SECONDARY BATTERY AND CHARGING METHOD THEREFOR
    4.
    发明申请
    LITHIUM ION SECONDARY BATTERY AND CHARGING METHOD THEREFOR 审中-公开
    锂离子二次电池及其充电方法

    公开(公告)号：US20150380777A1

    公开(公告)日：2015-12-31

    申请号：US14766501

    申请日：2014-03-04

    申请人： NEC ENERGY DEVICES, LTD.

    发明人： Hiroo TAKAHASHI ,  Takayuki SUZUKI

    IPC分类号： H01M10/44 ,  H01M10/0525 ,  H02J7/00

    CPC分类号： H01M10/446 ,  H01M4/366 ,  H01M4/621 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/44 ,  H02J7/0052 ,  H02J7/007

    摘要： A method for charging a lithium ion secondary battery including at least a positive electrode, a negative electrode provided with a negative electrode active material layer that includes carbon as a negative electrode active material, an electrolytic solution, and a sheathing material that encloses the positive electrode, the negative electrode and the electrolytic solution; the negative electrode active material layer including carboxymethyl cellulose and the electrolytic solution including an additive that can be decomposed at a predetermined voltage includes: preliminary charging including constant-current charging in which charging is performed at a fixed current value and, following the constant-current charging, constant-voltage charging in which charging is performed at a fixed voltage; degassing in which gas is removed from within the sheathing material after the preliminary charging; and main charging that follows the degassing in which the lithium ion secondary battery is charged. The fixed voltage during the constant-voltage charging is at least 3.3 V per cell.

    摘要翻译： 一种锂离子二次电池的充电方法，所述锂离子二次电池至少包括正极，设置有负极活性物质层的负极，所述负极活性物质层包含碳作为负极活性物质，电解液和包覆所述正极的护套材料 ，负极和电解液; 包含羧甲基纤维素的负极活性物质层和能够以规定电压分解的添加剂的电解液包括：包括恒定电流充电的预充电，其中以固定电流值进行充电，并且按照恒定电流 充电，固定电压进行充电的恒压充电; 在预充电之后，从包覆材料中除去气体的脱气; 并且在进行锂离子二次电池的脱气后进行主充电。 恒压充电期间的固定电压每个电池至少为3.3 V。

    SECONDARY BATTERY
    5.
    发明申请
    SECONDARY BATTERY 审中-公开

    公开(公告)号：US20170373299A1

    公开(公告)日：2017-12-28

    申请号：US15543597

    申请日：2016-01-26

    申请人： NEC ENERGY DEVICES, LTD.

    发明人： Kouzou TAKEDA ,  Masaaki MATSUU ,  Hiroo TAKAHASHI ,  Yoshimasa YAMAMOTO ,  Masanori HIRAI

    IPC分类号： H01M2/34 ,  H01M4/13 ,  H01M10/04 ,  H01M10/0585

    CPC分类号： H01M2/34 ,  H01M4/02 ,  H01M4/13 ,  H01M10/04 ,  H01M10/0585

    摘要： Provided is a secondary battery with a high electric characteristic and reliability that prevents the short circuit between a positive electrode and a negative electrode by an insulating member and that prevents or reduces the volume increase and deformation of a battery electrode assembly. A secondary battery includes a battery electrode assembly in which positive electrode 1 and negative electrode 6 are alternately laminated while separator 20 is interposed therebetween. Positive electrode 1 and negative electrode 6 include current collectors 3, 8 and active materials 2, 7, each surface of current collectors 3, 8 is provided with an application portion and a non-application portion of active materials 2, 8, and the active materials 2, 7 include a thin portion whose thickness is small. A charging capacity ratio A/C between negative electrode 6 and positive electrode 1 that face each other at an outer edge portion containing the thin portion is greater than the charging capacity ratio A/C between negative electrode 6 and positive electrode 1 that face each other at a center side with respect to the outer edge portion.

    GRAPHITE-BASED NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE, AND LITHIUM ION SECONDARY BATTERY
    6.
    发明申请
    GRAPHITE-BASED NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE, AND LITHIUM ION SECONDARY BATTERY 审中-公开

    公开(公告)号：US20170179487A1

    公开(公告)日：2017-06-22

    申请号：US15300026

    申请日：2015-03-30

    申请人： NEC Energy Devices, Ltd.

    发明人： Kouzou TAKEDA ,  Hiroo TAKAHASHI ,  Yasutaka KONO

    IPC分类号： H01M4/587 ,  H01M10/0525

    摘要： A graphite-based negative electrode active material including a first graphite particle being spheroidized and a second graphite particle having a roundness lower than the roundness of the first graphite particle, wherein the content of the second graphite particle based on the sum of the first graphite particle and the second graphite particle is in the range of 1 to 30% by mass, the ratio of a median particle diameter (D50) to a particle diameter at 5 cumulative % (D5), D50/D5, in a cumulative distribution of the first graphite particle is smaller than the ratio of a median particle diameter (D50) to a particle diameter at 5 cumulative % (D5), D50/D5, in a cumulative distribution of the second graphite particle, and the tap density in saturation of the particle mixture of the first graphite particle and the second graphite particle is higher than both the tap density in saturation of the first graphite particle and the tap density in saturation of the second graphite particle.