公开(公告)号：US20240429554A1

公开(公告)日：2024-12-26

申请号：US18824942

申请日：2024-09-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chong Xu ,  Cheng Li ,  Jianrui Yang

IPC: H01M50/417 ,  C08J5/18 ,  C08L23/06 ,  H01M50/403 ,  H01M50/489 ,  H01M50/491 ,  H01M50/494

Abstract: This application relates to a polyolefin-based film, including polyolefins with different weight-average molecular weights; where thickness of the polyolefin-based film is ≤6 μm, and the polyolefin-based film has a machine-direction shrinkage of ≤2% and a transverse-direction shrinkage of ≤1% at 115° C./1 h. This application uses polyolefins with different weight-average molecular weights as raw materials, enabling the resulting polyolefin-based films to have an ultra-thin thickness and a low thermal shrinkage. The reduction in thickness of the polyethylene-based film can improve the energy density of the cell to some extent, and the reduction in thermal shrinkage can improve the short-circuit test pass rate of the bare cell, enhancing the safety performance of the cell. In addition, the reduction in thermal shrinkage helps improve the heat resistance of the polyolefin-based film, delaying the thermal failure of adjacent cells when thermal runaway occurs in a cell.

公开(公告)号：US20240300763A1

公开(公告)日：2024-09-12

申请号：US18668266

申请日：2024-05-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chong Xu ,  Cheng Li ,  Jianrui Yang

IPC: B65H18/28 ,  H01M10/04

CPC classification number: B65H18/28 ,  H01M10/0409 ,  H01M10/0431 ,  B65H2511/20 ,  B65H2511/411 ,  B65H2701/19

Abstract: A separator roll, an electrode assembly, a battery cell, a battery, and an electric device are provided. The separator roll includes a separator body and a warning coating. The separator body has a head end and a tail end in a length direction and is constructed to be capable of winding in the length direction to form the separator roll with the tail end as a roll core. The warning coating is provided on the separator body. The warning coating is configured to be spaced from the tail end by a first preset length. In this way, the warning coating provides a warning in advance for the position of the tail end of the separator body on which the warning coating is located.

公开(公告)号：US20240421363A1

公开(公告)日：2024-12-19

申请号：US18822320

申请日：2024-09-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng Li ,  Chong Xu ,  Jianrui Yang

IPC: H01M10/42 ,  H01M50/403 ,  H01M50/449

Abstract: This application relates to a separator roll and a preparation method thereof. The separator roll includes a separator body, the separator body having a head end and a tail end in a length direction and being constructed to be capable of winding in the length direction to form a separator roll with the tail end as a roll core. A warning coating is provided on the separator body, the warning coating being configured to be spaced from the tail end by a first preset length. In this way, the warning coating provides a warning in advance for the position of the tail end of the separator body on which the warning coating is located.