公开(公告)号：US11050053B2

公开(公告)日：2021-06-29

申请号：US16422872

申请日：2019-05-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Li ,  Haihao Shi ,  Huihui Liu ,  Chao Jin ,  Tianyi Gao ,  Jianbao Xu ,  Shisong Li ,  Chao Guo

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/02

Abstract: The present invention relates to a battery, comprising a positive electrode plate, a separator and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and at least two layers of positive active materials on at least one surface of the positive electrode current collector in which the underlying positive active material layer in contact with the positive electrode current collector comprises a first positive active material, a first polymer material, and a first conductive material and in which the upper positive active material layer comprises a second positive active material, a second polymer material, and a second conductive material and the first polymer material comprises an oil-dispersible polymer material having a solubility in NMP at 130° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The battery exhibits good safety performance and improved electrical performance.

公开(公告)号：US20230341184A1

公开(公告)日：2023-10-26

申请号：US18342753

申请日：2023-06-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wei Chen ,  Huan Che ,  Shisong Li

IPC: F26B13/08 ,  F26B13/18 ,  F26B13/12

CPC classification number: F26B13/08 ,  F26B13/18 ,  F26B13/12

Abstract: Provided are an electrode plate drying device and a coating device, and relates to the technical field of batteries. The electrode plate drying device includes an oven, a first deflector roll, and a second deflector roll. The oven is configured to dry an electrode plate. The first deflector roll and the second deflector roll are disposed in the oven. The electrode plate winds around the first deflector roll and the second deflector roll. Positions of the first deflector roll and/or the second deflector roll in the oven are tunable so as to adjust a movement distance of the electrode plate in the oven.

公开(公告)号：US20240356033A1

公开(公告)日：2024-10-24

申请号：US18760017

申请日：2024-07-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Sainan Mu ,  Ning Wang ,  Xinghui Wang ,  Shisong Li ,  Shengwu Zhang ,  Zhiting Wei

IPC: H01M4/62 ,  C08L5/00 ,  H01M4/02 ,  H01M4/133 ,  H01M4/587

CPC classification number: H01M4/622 ,  C08L5/00 ,  H01M4/133 ,  H01M4/587 ,  C08L2203/20 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present application provides a negative electrode slurry, and a method for preparing the same, as well as a negative electrode plate, a secondary battery, a battery module, a battery pack, and an electrical apparatus thereof, where the negative electrode slurry comprises a negative electrode binder, and the negative electrode binder comprises a polymer composed of a building block represented by formula (I). The negative electrode binder in the present application is used to effectively improve the problem of roller sticking of the negative electrode plate during cold pressing, and the negative electrode binder and the negative electrode active material are better cladded, thereby reducing solid electrolyte interface reconstruction during cycles, and improving cycling performance and storage performance of the secondary battery.

公开(公告)号：US20240339621A1

公开(公告)日：2024-10-10

申请号：US18746076

申请日：2024-06-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Kaiming Deng ,  Lei Lu ,  Yalong Wang ,  Zheng Wang ,  Linzhen Yu ,  Changyuan Hu ,  Shisong Li ,  Shunhao Dai

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/04

CPC classification number: H01M4/623 ,  H01M4/0411 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028

Abstract: Provided are a secondary battery including an electrode sheet, the electrode sheet including: a current collector and an active material layer; the active material layer is provided on at least one surface of the current collector; the active material layer is divided into a first region and a second region in its thickness direction; the first region is located in a direction close to the surface of the current collector, the thickness of the first region accounts for ½ of the thickness of the active material layer, the binder content in the first region is denoted as A; the second region is located in a direction away from the surface of the current collector, the thickness of the second region accounts for ½ of the thickness of the active material layer, and the binder content in the second region is denoted as B; the electrode sheet satisfies: 1

公开(公告)号：US20200161659A1

公开(公告)日：2020-05-21

申请号：US16426867

申请日：2019-05-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Li ,  Haihao Shi ,  Huihui Liu ,  Chao Jin ,  Jianbao Xu ,  Shisong Li ,  Chao Guo

IPC: H01M4/62 ,  H01G11/38 ,  H01G11/48

Abstract: The present invention relates to a positive electrode plate and an electrochemical device. The positive electrode plate includes a current collector, a positive active material layer, and a binding layer disposed between the current collector and the positive active material layer, the binding layer comprising a polymer material, a conductive material, and an inorganic filler, wherein the polymer material comprises a binding layer matrix and the binding layer matrix is an oil-dispersible polymer material having a solubility in NMP at 130 ° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The positive electrode plate can improve the safety performance of the electrochemical device (for example, a capacitor, a primary battery, a secondary battery, or the like) under abnormal conditions such as nailing penetration.

公开(公告)号：US20240282958A1

公开(公告)日：2024-08-22

申请号：US18634752

申请日：2024-04-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wei Chen ,  Huan Che ,  Fang Luo ,  Shisong Li

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/62 ,  H01M4/66

CPC classification number: H01M4/525 ,  H01M4/0404 ,  H01M4/1391 ,  H01M4/623 ,  H01M4/667 ,  H01M2004/028

Abstract: In various embodiments, provided are an electrode plate, a method for preparing the same, a secondary battery, a battery module, and a battery pack comprising a main body region and an isolation region, where the isolation region is arranged on both sides of the main body region along a width direction of the electrode plate, the isolation region is provided with an insulating strip coating, and the main body region is provided with an active material layer. An outer edge of the active material layer is confined to a junction between the main body region and the isolation region, and a contact angle between a slurry forming the active material layer and the insulating strip coating is more than 90°, thereby improving the problem of diffusion of the active material slurry along the width direction of the electrode plate, and reducing a defective rate of the electrode plate.

公开(公告)号：US20240238829A1

公开(公告)日：2024-07-18

申请号：US18623068

申请日：2024-04-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huan Che ,  Wei Chen ,  Baohua Xu ,  Shisong Li

IPC: B05C5/02

CPC classification number: B05C5/0254

Abstract: A coating shim and a coating device, for applying a first slurry and a second slurry to an object to be coated are provided. The coating shim includes: a first flow channel for applying the first slurry to the object to be coated to form a first coating layer; and a second flow channel for applying the second slurry to the object to be coated to form a second coating layer. The first flow channel has a first slurry outlet at a first end face of the shim facing the object to be coated, the second flow channel has a second slurry outlet at the first end face, and the first slurry outlet and the second slurry outlet are configured to partially overlap in a thickness direction of the shim, such that the first coating layer and the second coating layer partially overlap in the thickness direction of the shim.

公开(公告)号：US12015138B2

公开(公告)日：2024-06-18

申请号：US18350680

申请日：2023-07-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wei Chen ,  Huan Che ,  Yuting Li ,  Yalong Qing ,  Tao Nie ,  Fang Luo ,  Shisong Li

IPC: H01M4/04 ,  B05C13/00

CPC classification number: H01M4/0471 ,  B05C13/00 ,  H01M4/0404

Abstract: A strip diverting mechanism includes a negative pressure unit and an air discharge unit. The negative pressure unit and the air discharge unit are arranged opposite each other, and a gap through which a strip passes is formed between the negative pressure unit and the air discharge unit. The negative pressure unit is configured to provide a suction force to the strip and the air discharge unit is configured to provide a repulsive force to the strip, to prevent the strip from contacting the negative pressure unit and the air discharge unit.

公开(公告)号：US11975355B2

公开(公告)日：2024-05-07

申请号：US18348370

申请日：2023-07-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huan Che ,  Wei Chen ,  Baohua Xu ,  Shisong Li

IPC: B05C5/02

CPC classification number: B05C5/0254

Abstract: A coating shim and a coating device, for applying a first slurry and a second slurry to an object to be coated are provided. The coating shim includes: a first flow channel for applying the first slurry to the object to be coated to form a first coating layer; and a second flow channel for applying the second slurry to the object to be coated to form a second coating layer. The first flow channel has a first slurry outlet at a first end face of the shim facing the object to be coated, the second flow channel has a second slurry outlet at the first end face, and the first slurry outlet and the second slurry outlet are configured to partially overlap in a thickness direction of the shim, such that the first coating layer and the second coating layer partially overlap in the thickness direction of the shim.

公开(公告)号：US20230272975A1

公开(公告)日：2023-08-31

申请号：US18173747

申请日：2023-02-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuting Li ,  Huan Che ,  Yalong Qing ,  Tao Nie ,  Shisong Li

IPC: F26B21/12 ,  F26B21/00

CPC classification number: F26B21/12 ,  F26B21/004

Abstract: A drying apparatus and an oven are provided. In some embodiments, the drying apparatus is used for drying a material. The drying apparatus includes: a blowing mechanism having an air-outlet channel for conveying dry gas to the material; and a guide member movably arranged in the air-outlet channel and used for dividing the air-outlet channel into a first sub-air-outlet channel and a second sub-air-outlet channel, and a first air outlet of the first sub-air-outlet channel and a second air outlet of the second sub-air-outlet channel both facing the material. In the above way, the drying apparatus provided in the present application is capable of realizing adjustment of an air speed without changing an air volume, thereby ensuring the drying efficiency.