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.

公开(公告)号：US20240222795A1

公开(公告)日：2024-07-04

申请号：US18592536

申请日：2024-03-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haiyi Hong ,  Lei Li ,  Xiaonan Cheng ,  Jianrui Yang ,  Peng Wang ,  Yi Zheng ,  Chengdong Sun

IPC: H01M50/451 ,  H01M50/42 ,  H01M50/426 ,  H01M50/46

CPC classification number: H01M50/451 ,  H01M50/42 ,  H01M50/426 ,  H01M50/46

Abstract: This application relates to the field of battery technologies, and in particular, to a binder and a preparation method thereof, and a separator, electrode assembly, battery cell, battery, and electric apparatus containing such binder. The binder includes a core layer structure and a shell layer structure provided on surface of the core layer structure, where the core layer structure includes a polyvinylidene fluoride polymer, and the shell layer structure includes a polyacrylate polymer. Polyvinylidene fluoride is a homopolymer with a crystallinity of about 50%, resulting in insufficient adhesion force. Therefore, in this application, the polyacrylate polymer is used to encapsulate the polyvinylidene fluoride polymer to obtain a core-shell-structured binder, so that the crystallinity of the polyvinylidene fluoride polymer in the core-shell-structured binder is improved, and adhesion performance of the core-shell-structured binder is improved, thereby increasing adhesion force between a separator and an electrode plate via the binder.

公开(公告)号：US20230016626A1

公开(公告)日：2023-01-19

申请号：US17942031

申请日：2022-09-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cong CHENG ,  Haiyi Hong ,  Yuanyuan Lan ,  Jianrui Yang ,  Na Liu ,  Haizu Jin

IPC: H01M50/446 ,  H01M50/403 ,  H01M50/494 ,  H01M50/491

Abstract: The present application relates to a separator in the electrochemical field and a preparation method therefor, and to a secondary battery comprising the separator, a device comprising the secondary battery. The separator of the present application is prepared by a simple process and has excellent heat resistance performance. Moreover, the secondary batteries and devices comprising the separator of the present application have good safety performance and cycling performance.

公开(公告)号：US20240145868A1

公开(公告)日：2024-05-02

申请号：US18410993

申请日：2024-01-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haiyi Hong ,  Jianrui Yang ,  Haiyang Kang ,  Chengdong Sun ,  Yi Zheng ,  Lei Chao

IPC: H01M50/451 ,  H01M50/403 ,  H01M50/417 ,  H01M50/42 ,  H01M50/423 ,  H01M50/426 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/457 ,  H01M50/46 ,  H01M50/491

CPC classification number: H01M50/451 ,  H01M50/403 ,  H01M50/417 ,  H01M50/42 ,  H01M50/423 ,  H01M50/426 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/457 ,  H01M50/461 ,  H01M50/491 ,  H01M2220/20

Abstract: Provided a separator, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an electric apparatus containing such separator. The separator includes: a substrate and a coating applied on at least one surface of the substrate, where the coating includes 40 wt % to 90 wt % first organic particles, 2 wt % to 15 wt % pressure-sensitive binder, and optionally 0 wt % to 50 wt % second organic particles. The first organic particles include an organic polymer and an inorganic substance. The pressure-sensitive binder includes an organic polymer and a plasticizer. The separator has good ionic conductivity and adhesion performance at room temperature, is not adhered under a pressure of 1 MPa or below and is significantly adhered under a pressure of 2 MPa or above, which can significantly improve structural stability and ionic conductivity of an electrochemical device while satisfying requirements for yield rate of production and kinetic performance of a battery cell.

公开(公告)号：US20240322372A1

公开(公告)日：2024-09-26

申请号：US18519060

申请日：2023-11-26

Applicant: Contemporary Amperex Technology Co., Limited ,  SINOMA LITHIUM BATTERY SEPARATOR (CHANGDE) CO., LTD.

Inventor： Jianrui Yang ,  Fenggang Zhao ,  Lianguang Wang ,  Tianle Yang

IPC: H01M50/451 ,  H01M50/406 ,  H01M50/417

CPC classification number: H01M50/451 ,  H01M50/406 ,  H01M50/417

Abstract: The present application provides a separator and a preparation method thereof, an electrochemical device, an electrochemical apparatus and a powered device. The separator comprises a base film, the base film has a tensile energy per unit thickness of ≥1.8 J/10 μm in both MD direction and TD direction, and an elongation of ≥150% in both MD direction and TD direction, and the thickness of the base film is 2 μm˜40 μm.

公开(公告)号：US20240313352A1

公开(公告)日：2024-09-19

申请号：US18657806

申请日：2024-05-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaonan Cheng ,  Haiyi Hong ,  Yanyun Ma ,  Jianrui Yang ,  Yi Zheng ,  Chengdong Sun

IPC: H01M50/451 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/489

CPC classification number: H01M50/451 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/489 ,  H01M2220/20

Abstract: This application discloses a separator and a preparation method therefor, a battery, and an electric apparatus. The separator includes a substrate and a pressure-sensitive coating, where the pressure-sensitive coating is formed on at least a portion of surface of the substrate. The pressure-sensitive coating includes composite particles and a first plasticizer. The composite particles form bulges on surface of the coating, and the composite particles include polyacrylate particles and inorganic particles. The inorganic particle is present between at least two of the polyacrylate particles, and solubility parameter of the first plasticizer and solubility parameter of the composite particles have a difference with an absolute value of 0.3 MPa1/2-4 MPa1/2.

公开(公告)号：US20240304819A1

公开(公告)日：2024-09-12

申请号：US18664259

申请日：2024-05-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaonan Cheng ,  Haiyi Hong ,  Lei Li ,  Jianrui Yang ,  Peng Wang ,  Yi Zheng ,  Chengdong Sun

IPC: H01M4/62 ,  H01M4/02 ,  H01M50/42

CPC classification number: H01M4/622 ,  H01M50/42 ,  H01M2004/021

Abstract: This application discloses a binder and a preparation method thereof, a separator, an electrode plate, an electrode assembly, a battery cell, a battery, and an electric apparatus, and relates to the field of battery technologies. The binder includes a coating layer and a core disposed in the coating layer, where the coating layer includes a polyacrylate copolymer, and the core includes ceramic. The binder is applied onto the separator and used in the battery, providing strong adhesion. This enhances the pre-cold pressing adhesion force and hardness of the battery cell, and reduces electrochemical impedance, thus improving the cycling performance of the battery.

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：US20230307790A1

公开(公告)日：2023-09-28

申请号：US18318744

申请日：2023-05-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haiyi Hong ,  Jianrui Yang ,  Yuanyuan Lan ,  Cong Cheng ,  Na Liu ,  Haizu Jin

IPC: H01M50/446 ,  H01M50/494 ,  H01M50/403 ,  H01M50/426

CPC classification number: H01M50/446 ,  H01M50/494 ,  H01M50/403 ,  H01M50/426 ,  H01M2220/20

Abstract: A separator, comprising a substrate and a coating provided on at least one surface of the substrate are provided. In some embodiments, the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles both embedded in the inorganic particles and forming protrusions on the surface of the coating; the first organic particles are secondary particles, and the number of the first organic particles in the coating is denoted as A; the second organic particles are primary particles and the number of the second organic particles in the coating is denoted as B; with the separator satisfying: 0.05≤A/B

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.