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    ENERGY STORAGE DEVICE
    2.
    发明申请
    ENERGY STORAGE DEVICE 有权

    公开(公告)号：US20210273219A1

    公开(公告)日：2021-09-02

    申请号：US17257877

    申请日：2019-07-18

    Applicant: GS Yuasa International Ltd.

    Inventor： Tomonori KAKO ,  Kazuki KAWAGUCHI ,  Shota ITO ,  Jun OYAMA ,  Taisei SEKIGUCHI

    IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/133 ,  H01M4/62 ,  H01M10/0562 ,  H01M10/0525

    Abstract: One aspect of the present invention is an energy storage device including a positive electrode containing: first positive active material particles containing a metal element capable of forming a conductive metal oxide; and second positive active material particles not containing the metal element, in which the first positive active material particles include a nickel-cobalt-manganese-containing lithium-transition metal composite oxide containing lithium, nickel, cobalt, and manganese as constituent elements, and the first positive active material particles are larger in median diameter than the second positive active material particles.

    ENERGY STORAGE DEVICE
    3.
    发明申请
    ENERGY STORAGE DEVICE 审中-公开

    公开(公告)号：US20190115584A1

    公开(公告)日：2019-04-18

    申请号：US16090727

    申请日：2017-04-03

    Applicant: GS Yuasa International Ltd.

    Inventor： Shota ITO ,  Tomonori KAKO ,  Kazuki KAWAGUCHI

    IPC: H01M4/131 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/36

    Abstract: An energy storage device includes a positive electrode having a positive active material layer containing an active material in the form of particles. The positive active material layer contains primary particles of the active material and secondary particles formed by aggregation of a plurality of primary particles. The proportion of primary particles relative to all particles of the active material in the positive active material layer is 5% or more and 40% or less. An method for producing an energy storage device includes preparing a positive electrode having a positive active material layer by forming a positive active material layer from a composite containing at least secondary particles of an active material, and assembling an energy storage device using the prepared positive electrode. In the preparation of the positive electrode, the positive active material layer is pressed to deagglomerate some of the secondary particles into primary particles, and the proportion of primary particles relative to all particles of the active material in the positive active material layer is adjusted to 5% or more and 40% or less.

    ENERGY STORAGE DEVICE, WINDING APPARATUS, AND WINDING METHOD
    4.
    发明申请
    ENERGY STORAGE DEVICE, WINDING APPARATUS, AND WINDING METHOD 有权
    能量储存装置，卷绕装置和卷绕方法

    公开(公告)号：US20130280568A1

    公开(公告)日：2013-10-24

    申请号：US13864133

    申请日：2013-04-16

    Applicant: GS YUASA INTERNATIONAL, LTD.

    Inventor： Akihiko MIYAZAKI ,  Sumio MORI ,  Tomonori KAKO

    IPC: H01M10/04

    CPC classification number: H01M10/0431 ,  H01M2/1686 ,  H01M10/0468 ,  H01M10/0587 ,  Y10T29/49114 ,  Y10T29/53135

    Abstract: Provided is an energy storage device which employs the use of a separator provided with a layer having poor thermal properties such as a heat resistant coated layer and is capable of inhibiting a decrease in performance. The energy storage device includes: a wound body including a positive electrode, a negative electrode, and separators which are layered and wound, the separators being interposed between the positive electrode and the negative electrode and having a first surface and a second surface, the first surface having thermal bonding properties superior to thermal bonding properties of the second surface; and an insulation sheet wound around an outermost layer of the wound body. At least one of the separators is bonded to the insulation sheet via the first surface thereof.

    Abstract translation: 提供一种能量储存装置，其使用具有耐热性能差的层的隔膜，例如耐热涂层，并且能够抑制性能的降低。 能量存储装置包括：卷绕体，其包括正极，负极和层叠并卷绕的隔板，所述隔板插入在正极和负极之间并具有第一表面和第二表面，第一 具有优于第二表面的热粘合性能的热粘合性能的表面; 以及缠绕在所述卷绕体的最外层的绝缘片。 至少一个分离器经由其第一表面结合到绝缘片。

    ENERGY STORAGE DEVICE
    6.
    发明公开
    ENERGY STORAGE DEVICE 审中-公开

    公开(公告)号：US20230163302A1

    公开(公告)日：2023-05-25

    申请号：US17910456

    申请日：2021-03-10

    Applicant: GS Yuasa International Ltd.

    Inventor： Kazuki KAWAGUCHI ,  Jun OYAMA ,  Taisei SEKIGUCHI ,  Tomonori KAKO

    IPC: H01M4/587

    CPC classification number: H01M4/587 ,  H01M2004/027

    Abstract: An energy storage device according to an aspect of the present invention includes a negative electrode and a positive electrode, the negative electrode includes a negative substrate and a negative active material layer directly or indirectly layered on the negative substrate, the negative active material layer contains a negative active material, the negative active material contains solid graphite particles as a main component, the aspect ratio of the solid graphite particles is 1 or more and 5 or less, and a negative electrode utilization factor that is the proportion of the amount of charge per mass of the negative active material in a full charge state to a theoretical capacity per mass of graphite is 0.65 or more.

    ENERGY STORAGE DEVICE
    10.
    发明申请
    ENERGY STORAGE DEVICE 审中-公开

    公开(公告)号：US20190027753A1

    公开(公告)日：2019-01-24

    申请号：US16069929

    申请日：2017-01-13

    Applicant: GS Yuasa International Ltd.

    Inventor： Shota ITO ,  Kenta NAKAI ,  Akihiko MIYAZAKI ,  Tomonori KAKO ,  Sumio MORI

    IPC: H01M4/587 ,  H01M10/0525

    Abstract: An energy storage device of which endurance capacity retention ratio is improved is provided.An energy storage device 10 includes: a positive electrode plate 12 containing a positive composite layer including a positive active material capable of occluding and releasing a lithium ion; and a negative electrode plate 13 containing a negative composite layer including a negative active material capable of occluding and releasing a lithium ion. A peak pore diameter Rp of the positive composite layer in a pore distribution measured by a mercury penetration method is 0.5 μm or less, and a peak pore diameter Rn of the negative composite layer in a pore distribution measured by a mercury penetration method is 0.5 μm or less. A ratio Rp/Rn of the peak pore diameter of the positive composite layer to the peak pore diameter of the negative composite layer is 0.60 or more and 1.70 or less.

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