Patents by Inventor Chengdong Sun

Chengdong Sun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240360259
    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.
    Type: Application
    Filed: July 7, 2024
    Publication date: October 31, 2024
    Inventors: Lei Li, Haiyang Kang, Chengdong Sun, Yi Zheng, Shaohua Ai
  • Publication number: 20240356156
    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, a secondary battery, and an electrical apparatus thereof. The binder includes a core structure and a shell structure disposed on a surface of the core structure. The shell structure includes an acrylate copolymer, and the core structure comprises a rigid polymer. The rigid polymer has a crystallinity ranging from 32% to 94%. The binder with a core-shell structure includes the core structure of the rigid polymer. During cold pressing of a battery cell, the rigid polymer acts as a support, making a particle structure of the binder stable, that is, the rigid polymer acts as a support, resulting in an overall increase in the rigidity of the binder.
    Type: Application
    Filed: March 1, 2024
    Publication date: October 24, 2024
    Inventors: Lei Li, Haiyang Kang, Yi Zheng, Meihuang Chen, Runhao Lai, Peng Wang, Chengdong Sun
  • Publication number: 20240356155
    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.
    Type: Application
    Filed: March 1, 2024
    Publication date: October 24, 2024
    Inventors: Lei Li, Meihuang Chen, Yi Zheng, Haiyang Kang, Runhao Lai, Chengdong Sun
  • Publication number: 20240347857
    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.
    Type: Application
    Filed: March 1, 2024
    Publication date: October 17, 2024
    Inventors: Lei Li, Chengdong Sun, Yi Zheng, Haiyang Kang, Meihuang Chen
  • Publication number: 20240339616
    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, a separator comprising the binder, a battery cell, a battery and an electrical apparatus. The binder for secondary batteries includes an organic polymer. The organic polymer has a first glass transition temperature and a second glass transition temperature, the first glass transition temperature is less than or equal to 25° C., and the second glass transition temperature is greater than 25° C. During coating of a separator, the binder is non-viscous at room temperature to facilitate winding and unwinding of the separator. However, the binder has a better bonding force when a cold pressing process is carried out after the winding with positive and negative electrode plates, so that the positive and negative electrode plates and the separator fit each other closely.
    Type: Application
    Filed: March 28, 2024
    Publication date: October 10, 2024
    Inventors: Lei Li, Haiyang Kang, Yi Zheng, Meihuang Chen, Chengdong Sun
  • Publication number: 20240313225
    Abstract: This application discloses a binder, 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 an organic polymer and an inorganic substance, and the binder has a first glass transition temperature and a second glass transition temperature within a range of ?10° C. to 95° C., where the first glass transition temperature is higher than the second glass transition temperature. The organic polymer and the inorganic substance act together to obtain the binder with good adhesion performance and appropriate glass transition temperatures, suitable for fully exerting the adhesion performance of the binder under battery operation conditions, and thereby improving the kinetic and safety performance of batteries.
    Type: Application
    Filed: May 21, 2024
    Publication date: September 19, 2024
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Haiyang KANG, Yi ZHENG, Chengdong SUN, Yang YU, Chuying OUYANG
  • Publication number: 20240313352
    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.
    Type: Application
    Filed: May 8, 2024
    Publication date: September 19, 2024
    Inventors: Xiaonan Cheng, Haiyi Hong, Yanyun Ma, Jianrui Yang, Yi Zheng, Chengdong Sun
  • Publication number: 20240304819
    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.
    Type: Application
    Filed: May 14, 2024
    Publication date: September 12, 2024
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Xiaonan Cheng, Haiyi Hong, Lei Li, Jianrui Yang, Peng Wang, Yi Zheng, Chengdong Sun
  • Publication number: 20240304945
    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.
    Type: Application
    Filed: May 8, 2024
    Publication date: September 12, 2024
    Inventors: Yanyun Ma, Haiyi Hong, Xiaonan Cheng, Peng Wang, Lei Chao, Jianrui Yang, Yi Zheng, Chengdong Sun
  • Publication number: 20240274978
    Abstract: This application discloses a separator and a preparation method thereof, a battery, and an electric apparatus. The separator includes a substrate and a coating, where the coating is formed on at least a portion of surface of the substrate, and the coating includes composite particles and a binder. 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. Crosslinking degree a of the composite particles and mass swelling degree b thereof in an electrolyte satisfy a/b?1 and a?75%.
    Type: Application
    Filed: April 10, 2024
    Publication date: August 15, 2024
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Haiyi HONG, Xiaonan CHENG, Yanyun MA, Jianrui YANG, Peng WANG, Lei CHAO, Yi ZHENG, Chengdong SUN
  • Publication number: 20240250315
    Abstract: A binder includes a polyacrylate copolymer and a lithium-containing compound. A preparation method of a binder includes adding monomers of a polyacrylate copolymer to a first emulsifier solution to obtain a pre-emulsion, adding an initiator to the pre-emulsion for reaction to obtain a reaction solution, and adding a lithium-containing substance to the reaction solution to adjust pH value to 7 to 8 and performing filtering to obtain the binder.
    Type: Application
    Filed: April 4, 2024
    Publication date: July 25, 2024
    Inventors: Xiaonan CHENG, Haiyi HONG, Lei LI, Jianrui YANG, Haiyang KANG, Yi ZHENG, Chengdong SUN
  • Publication number: 20240218169
    Abstract: A binder includes a core layer structure and a shell layer structure provided on a surface of the core layer structure and fully enveloping the core layer structure. The core layer structure includes a polyacrylate polymer, and the shell layer structure includes a polyvinylidene fluoride polymer.
    Type: Application
    Filed: March 20, 2024
    Publication date: July 4, 2024
    Inventors: Lei LI, Haiyi HONG, Xiaonan CHENG, Jianrui YANG, Peng WANG, Yi ZHENG, Chengdong SUN
  • Publication number: 20240222791
    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 a surface of the core layer structure, where the core layer structure includes a polyacrylate polymer, and the shell layer structure includes a polyvinylidene fluoride polymer.
    Type: Application
    Filed: February 9, 2024
    Publication date: July 4, 2024
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Lei LI, Haiyi HONG, Xiaonan CHENG, Jianrui YANG, Haiyang KANG, Yi ZHENG, Chengdong SUN
  • Publication number: 20240222795
    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.
    Type: Application
    Filed: March 1, 2024
    Publication date: July 4, 2024
    Inventors: Haiyi Hong, Lei Li, Xiaonan Cheng, Jianrui Yang, Peng Wang, Yi Zheng, Chengdong Sun
  • Publication number: 20240162566
    Abstract: A separator includes a substrate and a coating. The coating is formed on at least a portion of surface of the substrate. The coating includes composite particles and a binder. The composite particles form bulges on surface of the coating. The composite particles include polyacrylate particles and first inorganic particles. The first inorganic particle is present between at least two of the polyacrylate particles.
    Type: Application
    Filed: January 22, 2024
    Publication date: May 16, 2024
    Inventors: Haiyi HONG, Yanyun MA, Xiaonan CHENG, Lei CHAO, Peng WANG, Chongwang HAN, Yuxia LI, Jianrui YANG, Yi ZHENG, Chengdong SUN
  • Publication number: 20240145868
    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.
    Type: Application
    Filed: January 11, 2024
    Publication date: May 2, 2024
    Inventors: Haiyi Hong, Jianrui Yang, Haiyang Kang, Chengdong Sun, Yi Zheng, Lei Chao
  • Publication number: 20240145864
    Abstract: This application provides a binder and a separator containing same, an electrode plate, and a related secondary battery, a battery module, a battery pack, and an electrical device. The binder includes an organic polymer and an inorganic compound. The organic polymer is polymerized from a first polymerizing monomer containing an ester bond, a second polymerizing monomer containing a nitrile bond, and a third polymerizing monomer containing an amide bond. A weight ratio between the first polymerizing monomer, the second polymerizing monomer, and the third polymerizing monomer is 1:(0 to 0.8):(0 to 0.15), and optionally 1:(0.05 to 0.2):(0.05 to 0.1). When the binder is applied to the separator, the resistance of the separator is reduced, the ionic conductivity of the separator is improved, and the battery performance is improved.
    Type: Application
    Filed: January 11, 2024
    Publication date: May 2, 2024
    Inventors: Haiyang Kang, Yi Zheng, Chengdong Sun, Yang Yu, Chuying Ouyang
  • Publication number: 20240120615
    Abstract: A binder includes a polymer and ceramic particles modified with silane coupling agent. The polymer contains 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, the second-type monomer, and the third-type monomer is (50 to 58):(40 to 44):(2 to 6). 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.
    Type: Application
    Filed: November 6, 2023
    Publication date: April 11, 2024
    Inventors: Haiyang KANG, Lei LI, Yi ZHENG, Chengdong SUN, Shaohua AI
  • Publication number: 20240097276
    Abstract: This application relates to the field of lithium battery technologies, and in particular, to a binder, a separator, and a lithium-ion battery using such separator, where the binder includes a terpolymer formed by copolymerization of a first monomer unit, a second monomer unit, and a third monomer unit that are specified.
    Type: Application
    Filed: October 31, 2023
    Publication date: March 21, 2024
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Lei LI, Haiyang KANG, Yi ZHENG, Chengdong SUN, Shaohua AI
  • Publication number: 20240014531
    Abstract: A fluorine-free insulating slurry includes a first resin selected from resins with a glass transition temperature of above 80° C. and a liquid absorbency in a standard electrolyte solution below 15%, a second resin selected from resins with a glass transition temperature below ?5° C., an inorganic filler, and an organic solvent.
    Type: Application
    Filed: July 7, 2023
    Publication date: January 11, 2024
    Inventors: Shaohua AI, Chengdong SUN, Yi ZHENG