Electrode member, electrode assembly and secondary battery

    公开(公告)号:US11271273B2

    公开(公告)日:2022-03-08

    申请号:US17137090

    申请日:2020-12-29

    摘要: The present application relates to an electrode member, an electrode assembly and a secondary battery. The electrode member comprises an electrode body and a conductive structure that has a first portion having an active material and a second portion extending from the first portion. The second portion comprises a main portion and a transition portion provided between the main portion and the first portion, and a width of the transition portion larger than a width of the main portion. The conductive structure is welded with the second portion and extends along a direction away from the first portion. At least a part of a welding region formed by the second portion and the conductive structure is positioned at the transition portion, thereby avoiding the overcurrent area being significantly reduced by the main portion and ensuring that every position electric current passes through have a sufficient overcurrent area.

    ELECTRODE PLATE, ELECTROCHEMICAL APPARATUS, BATTERY MODULE, BATTERY PACK, AND DEVICE

    公开(公告)号:US20210119221A1

    公开(公告)日:2021-04-22

    申请号:US17134014

    申请日:2020-12-24

    IPC分类号: H01M4/66 H01M4/13 H01M10/0525

    摘要: This application relates to the battery field, and specifically, to an electrode plate, an electrochemical apparatus, a battery module, a battery pack, and a device. The electrode plate in this application includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, where the current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer, a single-side thickness D2 of the conductive layer satisfies 30 nm≤D2≤3 μm, and a conductive primer layer including a conductive material and a bonding agent is further disposed between the current collector and the electrode active material layer. The electrode plate in this application has good machinability. An electrochemical apparatus including the electrode plate has high energy density, good electrical performance, and long-term reliability.

    ELECTRODE MEMBER, ELECTRODE ASSEMBLY AND SECONDARY BATTERY

    公开(公告)号:US20200235368A1

    公开(公告)日:2020-07-23

    申请号:US16732180

    申请日:2019-12-31

    摘要: The present disclosure relates to the field of energy storage device, and particularly relates to an electrode member, an electrode assembly and a secondary battery. The electrode member comprises an electrode body and a conductive structure. The conducting layer comprises a first portion having an active material and a second portion extending from the first portion; the second portion comprises a main portion and a transition portion, the transition portion is provided between the main portion and the first portion, and a width of the transition portion is larger than a width of the main portion. The conductive structure is welded with the second portion and extends along a direction away from the first portion, and at least a part of a welding region formed by the second portion and the conductive structure is positioned at the transition portion. The present disclosure can avoid the overcurrent area being significantly reduced caused by the main portion, ensure that every position the electric current passing through has a sufficient overcurrent area, and improve the safety performance of the secondary battery.

    BATTERY CELL, BATTERY, AND ELECTRIC DEVICE
    8.
    发明公开

    公开(公告)号:US20240313366A1

    公开(公告)日:2024-09-19

    申请号:US18672003

    申请日:2024-05-23

    摘要: Embodiments of this application provide a battery cell, a battery, and an electric device. The battery cell includes an electrode assembly, and the electrode assembly includes a body portion and a lead-out portion that are disposed in a first direction, the body portion being electrically connected to an electrode terminal via the lead-out portion. The lead-out portion includes a tab portion and a conductive structure. A first end of the conductive structure is welded to the tab portion to form a welded zone, a second end of the conductive structure is connected to the electrode terminal, and the conductive structure extends along a direction leaving the body portion. A melting zone is provided between the welded zone and the body portion. The technical solution of this application can reduce the probability of thermal runaway of batteries.