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：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：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：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：US20240380072A1

公开(公告)日：2024-11-14

申请号：US18778968

申请日：2024-07-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haiyi Hong ,  Lei Li ,  Xiaonan Cheng ,  Jianrui Yang ,  Haiyang Kang ,  Yi Zheng ,  Chengdong Sun

IPC: H01M50/46 ,  B01J13/18 ,  C08F220/14 ,  C08K5/12 ,  H01M50/414 ,  H01M50/42 ,  H01M50/443

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 capsule and a core material provided in the capsule, where the capsule includes an organic polymer, and the core material includes a plasticizer. The plasticizer is encapsulated as the core material inside the capsule of the organic polymer to improve adhesion performance of the organic polymer, so as to increase adhesion force between a separator and an electrode plate by the binder.

公开(公告)号：US20240304945A1

公开(公告)日：2024-09-12

申请号：US18658920

申请日：2024-05-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M50/446 ,  H01M50/42 ,  H01M50/434

CPC classification number: H01M50/446 ,  H01M50/42 ,  H01M50/434

Abstract: This application discloses a separator and a preparation method therefor, a battery, and an electric apparatus. The coating is formed on at least part of a surface of the substrate, the coating includes composite particles, first inorganic particles, and a binder, the composite particles form bulges on a surface of the coating, the composite particles include polyacrylate particles and ion-conducting particles, and the ion-conducting particle is present between at least two polyacrylate particles. A mass ratio of the first inorganic particles to the ion-conducting particles is 1:0.007-0.06.

公开(公告)号：US20240266673A1

公开(公告)日：2024-08-08

申请号：US18624235

申请日：2024-04-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M50/446 ,  H01M50/417 ,  H01M50/426 ,  H01M50/449 ,  H01M50/494

CPC classification number: H01M50/446 ,  H01M50/417 ,  H01M50/426 ,  H01M50/449 ,  H01M50/494

Abstract: This application relates to a separator, including a substrate and a coating layer provided on at least one surface of the substrate. The coating layer includes organic particles and inorganic particles, the organic particles include first-type organic particles, the inorganic particles form an inorganic particle layer, and the first-type organic particles are embedded into the inorganic particle layer and form bulges on a surface of the inorganic particle layer. A number-based median particle size of the first-type organic particles is ≥12 μm, and a ratio of an average height of the bulges to a thickness of the inorganic particle layer is ≥4. This application further relates to a separator preparation method, a secondary battery containing such separator, and a related battery module, battery pack, and apparatus.