SECONDARY BATTERY, ELECTRONIC EQUIPMENT, AND ELECTRIC TOOL

    公开(公告)号:US20230335805A1

    公开(公告)日:2023-10-19

    申请号:US18215574

    申请日:2023-06-28

    发明人: Akira OTANI

    摘要: A secondary battery suppresses an occurrence of a welding defect as much as possible. A negative electrode includes, at a first major surface of a negative electrode foil having a band shape, a first negative electrode active material covered part covered with a negative electrode active material layer, a first negative electrode active material uncovered part extending in a longitudinal direction of the negative electrode foil, and a first insulating layer provided between the first negative electrode active material covered part and the first negative electrode active material uncovered part. The negative electrode further includes, at a second major surface which is another major surface of the negative electrode foil, a second negative electrode active material covered part covered with a negative electrode active material layer, a second negative electrode active material uncovered part extending in the longitudinal direction of the negative electrode foil, and a second insulating layer provided between the second negative electrode active material covered part and the second negative electrode active material uncovered part. When at least a negative electrode side of an electrode wound body is viewed in a section taken along a plane including a central axis, the first major surface faces toward the central axis of the electrode wound body, and furthermore, the first insulating layer is smaller in length than the second insulating layer.

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE
    38.
    发明公开

    公开(公告)号:US20230238626A1

    公开(公告)日:2023-07-27

    申请号:US18192957

    申请日:2023-03-30

    摘要: An electrochemical device includes a housing including a body portion and a first portion, an electrode assembly, and a tab. In a second direction, the body portion includes a first wall and a second wall disposed opposite to each other. In a third direction, the body portion includes a first sidewall and a second sidewall disposed opposite to each other. The first portion includes a first seal edge and a second seal edge. The first seal edge is connected to the first sidewall and the second wall. The second seal edge is connected to the first seal edge. The second seal edge is disposed between the first seal edge and the first sidewall. The housing includes a first housing part and a second housing part disposed opposite to each other. The first housing part includes a first polymer layer. The second housing part includes a second polymer layer.