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：US20240360259A1

公开(公告)日：2024-10-31

申请号：US18765315

申请日：2024-07-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lei Li ,  Haiyang Kang ,  Chengdong Sun ,  Yi Zheng ,  Shaohua Ai

IPC: C08F220/18 ,  C08K7/26 ,  C08K9/08 ,  H01M50/42 ,  H01M50/437 ,  H01M50/446 ,  H01M50/451

CPC classification number: C08F220/18 ,  C08K7/26 ,  C08K9/08 ,  H01M50/42 ,  H01M50/437 ,  H01M50/446 ,  H01M50/451 ,  C08K2201/005

Abstract: A binder composition includes a polymer and ceramic particles, the polymer including structural units derived from a first-type monomer, a second-type monomer, and a third-type monomer, and a molar ratio of the first-type monomer, second-type monomer, and third-type monomer being (50 to 58):(40 to 44):(2 to 6); where the first-type monomer is selected from one or more compounds of formula I, the second-type monomer is selected from one or more compounds of formula II, and the third-type monomer is selected from one or more compounds of formula III. The binder improves the porosity of the separator, increases the ionic conductivity, and reduces the internal resistance, thereby enhancing the cycling performance of the secondary battery.

公开(公告)号：US20240356155A1

公开(公告)日：2024-10-24

申请号：US18592528

申请日：2024-03-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lei Li ,  Meihuang Chen ,  Yi Zheng ,  Haiyang Kang ,  Runhao Lai ,  Chengdong Sun

IPC: H01M50/42 ,  H01M50/449

CPC classification number: H01M50/42 ,  H01M50/449

Abstract: The present application relates to the technical field of secondary batteries, and more particularly relates to a binder for secondary batteries, a separator, a secondary battery and an electrical apparatus. The binder for secondary batteries is in a ring shape, and includes an acrylate copolymer. The acrylate copolymer has good adhesion, and a contact point of the binder with the ring-shaped structure is a circle line of the ring-shaped binder. The ring-shaped binder has bonding points with larger areas than a spherical binder, such that good bonding performance can be achieved when the usage amount of the binder with the ring-shaped structure is reduced.

公开(公告)号：US20240347857A1

公开(公告)日：2024-10-17

申请号：US18592560

申请日：2024-03-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lei Li ,  Chengdong Sun ,  Yi Zheng ,  Haiyang Kang ,  Meihuang Chen

IPC: H01M50/42

CPC classification number: H01M50/42

Abstract: The present application relates to the technical field of secondary batteries, and in particular to a binder for secondary batteries and a preparation method thereof, as well as a separator, battery cell, battery and electrical apparatus comprising the binder. The binder for secondary batteries includes a first polymer and a second polymer, the first polymer includes an acrylate copolymer, and the second polymer includes a water-soluble polymer. When the separator is coated, the binder is stirred evenly in water, coated on the separator, and oven dried to form a bonding layer on the separator. The bonding layer includes a side facing the separator and a side away from the separator. The bonding layer is bonded on the separator, and the side away from the separator has no adhesiveness, which facilitates the winding and unwinding of the separator.

公开(公告)号：US20190067685A1

公开(公告)日：2019-02-28

申请号：US16047985

申请日：2018-07-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhongsi Zhu ,  Ze Zhong ,  Chengdong Sun ,  Yi Zheng ,  Lingyun Feng ,  Hang Zhou ,  Long Wang

IPC: H01M4/36 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525 ,  H01G11/38 ,  H01G11/70

Abstract: The present disclosure provides a negative electrode slurry, a negative electrode plate and an electrochemical energy storage device. The negative electrode slurry comprises a solvent and a solid component dispersed in the solvent. The solid component comprises a negative electrode active material, a water-soluble binder and a dispersant. The negative electrode active material comprises a carbon-type active material. The dispersant comprises an A dispersant and a B dispersant, the A dispersant is a cellulose-type dispersant, the B dispersant is at least one of poly(acrylic acid)-type dispersant, polyacrylate-type dispersant and polyacrylamide-type dispersant. Under a combined effect of the A dispersant and the B dispersant, they can ensure that the electrochemical energy storage device has excellent dynamic performance, which can prevent lithium (or sodium, magnesium and zinc) from precipitating under condition of rapid and large current charging, meanwhile they can ensure that the electrochemical energy storage device has excellent cycle performance.