BATTERY CELL, MANUFACTURING METHOD AND MANUFACTURING SYSTEM THEREOF, BATTERY, AND POWERED DEVICE

    公开(公告)号:US20230155233A1

    公开(公告)日:2023-05-18

    申请号:US18155037

    申请日:2023-01-16

    CPC classification number: H01M50/24

    Abstract: Examples of the present application relate to a battery cell, a manufacturing method and a manufacturing system thereof, a battery, and a powered device. The battery cell includes: a shell, where the shell has a wall portion; an electrode assembly accommodated in the shell; and a pressure relief mechanism. The pressure relief mechanism is provided on the wall portion, the pressure relief mechanism includes a weak portion, a body portion, and a connecting portion. The weak portion is configured to be damaged when pressure inside the shell reaches a threshold so as to relieve the pressure. The body portion is located in a region defined by the weak portion. The connecting portion is located on an outer side of the weak portion and configured to connect the wall portion.

    END COVER ASSEMBLY, BATTERY CELL, BATTERY PACK, APPARATUS AND LIQUID-INJECTION METHOD

    公开(公告)号:US20220238945A1

    公开(公告)日:2022-07-28

    申请号:US17721384

    申请日:2022-04-15

    Abstract: The present application provides an end cover assembly, a battery cell, a battery pack, apparatus and a liquid injection method. The end cover assembly includes an end cover plate, including a through hole for injecting electrolyte and a fixing portion arranged around the through hole; a nail body, including an accommodating portion for receiving the fixing portion. The accommodating portion is in a shape of annular and includes two inner walls arranged to be spaced apart from each other in a radial direction of the accommodating portion, and an inner wall and an outer wall of the fixing portion are respectively pressed against and engaged with the two inner walls of the accommodating portion to seal the through hole.

    Secondary battery, battery pack and device using battery

    公开(公告)号:US11114716B1

    公开(公告)日:2021-09-07

    申请号:US17136786

    申请日:2020-12-29

    Abstract: A secondary battery, a battery pack and a device using the battery are provided, wherein the end cover assembly includes: an end cover with a through hole for injection of electrolyte and an accommodating part, the accommodating part is arranged on a side far away from a shell of the end cover and is arranged along a circumferential direction of the through hole; a sealing element; and a cover body for covering at least part of the sealing element, the cover body is rotatable and includes a limiting part; when the cover body rotates to a first position, the limiting part is located inside the accommodating part to limit separation of the cover body from the end cover; when the cover body rotates to a second position, the limiting part and the accommodating part are misplaced to realize separation of the cover body from the end cover.

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