Patents by Inventor Dongyang Guo

Dongyang Guo 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: 20240339731
    Abstract: A separator includes a porous substrate and an inorganic coating layer disposed on at least one surface of the porous substrate. The porous substrate includes fibers. The fibers are made of a material including at least one of polyethylene or polypropylene. A diameter of the fibers is 0.01 ?m to 0.70 ?m. A diameter difference between any two fibers ranges from 0 ?m to 0.40 ?m. The inorganic coating layer includes a polymer and inorganic particles. The polymer includes at least one of styrene-butadiene rubber, a polyacrylate ester, or a polyolefin. The polymer can be modified by a functional group. The modifying functional group includes at least one of —OH, —COOH, or —NH. The above settings improve the infiltration effect of the electrolyte solution for the separator and the capability of the separator in retaining the electrolyte solution, thereby improving the cycle performance of the electrochemical device.
    Type: Application
    Filed: March 29, 2024
    Publication date: October 10, 2024
    Applicant: Ningde Amperex Technology Limited
    Inventors: Mingchang ZHU, Dongyang GUO, Qingwen ZHANG, Minjing CHEN
  • Publication number: 20240304852
    Abstract: An electrochemical device includes a cathode, an anode and a separator, the separator being disposed between the cathode and the anode, the separator including a porous substrate and a porous layer, and the porous layer being disposed on a surface of the porous substrate and including inorganic particles and a binder, where a ratio of a puncture elongation of the porous substrate to a puncture force of the porous substrate is about 1.5 mm/N to about 25 mm/N. A lithium-ion battery including the separator, provided by the present application, improves the safety performance of the lithium-ion battery.
    Type: Application
    Filed: May 20, 2024
    Publication date: September 12, 2024
    Applicant: Ningde Amperex Technology Limited
    Inventor: DongYang GUO
  • Patent number: 12021183
    Abstract: An electrochemical device includes a cathode, an anode and a separator, the separator being disposed between the cathode and the anode, the separator including a porous substrate and a porous layer, and the porous layer being disposed on a surface of the porous substrate and including inorganic particles and a binder, where a ratio of a puncture elongation of the porous substrate to a puncture force of the porous substrate is about 1.5 mm/N to about 25 mm/N. A lithium-ion battery including the separator, provided by the present application, improves the safety performance of the lithium-ion battery.
    Type: Grant
    Filed: January 14, 2022
    Date of Patent: June 25, 2024
    Assignee: Ningde Amperex Technology Limited
    Inventor: DongYang Guo
  • Publication number: 20230369721
    Abstract: A layered porous film includes a substrate film and a polymer coating provided on at least one side of the substrate film. The substrate film and the polymer coating satisfy both formula I and formula II: 0?(Tm1?Tm2)/M1?0.0005, formula I, and 0?(Tm1?Tm2)/M2?0.05, formula II; where Tm1 is a melting point of the substrate film, and M1 is a weight-average molecular weight of a polymer contained in the substrate film; and Tm2 is a melting point of the polymer coating, and M2 is a weight-average molecular weight of a polymer contained in the polymer coating. The layered porous film has advantages of low pore-closing temperature and high inflection resistance.
    Type: Application
    Filed: July 28, 2023
    Publication date: November 16, 2023
    Applicant: Ningde Amperex Technology Limited
    Inventors: Long Zhang, Dongyang Guo
  • Publication number: 20230327290
    Abstract: A separator and a lithium-ion battery. The separator includes a porous substrate, and a first coating layer arranged on at least one surface of the porous substrate, wherein the first coating layer includes an aromatic polyamide. An aramid coating layer is used; the aromatic polyamide in the aramid coating layer swells or plasticizes under the action of a solvent and a lithium salt in the electrolyte at high temperature or normal temperature, to increase the elongation of the separator, while improving the safety performance of the lithium-ion battery by interaction between the aramid coating layer and the electrode active material or the binder.
    Type: Application
    Filed: June 2, 2023
    Publication date: October 12, 2023
    Applicant: Ningde Amperex Technology Limited
    Inventors: Dongyang GUO, Gengjin KONG, Kebing GUO, Xinghua TAO
  • Patent number: 11658334
    Abstract: A separator including a porous substrate and a porous layer. The porous layer is disposed on a surface of the porous substrate and includes inorganic particles and a binder. The porous substrate has an absolute plastic deformation rate in a first direction ranging from about 40% to about 1800%. By using the separator provided in the present application, the safety performance of lithium ion batteries is improved.
    Type: Grant
    Filed: February 19, 2021
    Date of Patent: May 23, 2023
    Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
    Inventors: KeBing Guo, DongYang Guo, GengJin Kong, XingHua Tao
  • Patent number: 11387522
    Abstract: The present application relates to a multilayer separator and a device using the same. Specifically, the present application provides a multilayer separator comprising at least one first porous substrate and at least one second porous substrate, wherein the peeling strength between the first porous substrate and the second porous substrate is in a range of 2 N/m to 50 N/m, and the first porous substrate has an obturator temperature of lower than 135° C. The multilayer separator provided by the present application can effectively guarantee the safety and electrochemical performance of the electrochemical device.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: July 12, 2022
    Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
    Inventor: DongYang Guo
  • Publication number: 20220140438
    Abstract: An electrochemical device includes a cathode, an anode and a separator, the separator being disposed between the cathode and the anode, the separator including a porous substrate and a porous layer, and the porous layer being disposed on a surface of the porous substrate and including inorganic particles and a binder, where a ratio of a puncture elongation of the porous substrate to a puncture force of the porous substrate is about 1.5 mm/N to about 25 mm/N. A lithium-ion battery including the separator, provided by the present application, improves the safety performance of the lithium-ion battery.
    Type: Application
    Filed: January 14, 2022
    Publication date: May 5, 2022
    Applicant: Ningde Amperex Technology Limited
    Inventor: DongYang GUO
  • Patent number: 11264677
    Abstract: Embodiments of the present application relate to an electrochemical device. Specifically, the electrochemical device includes a cathode, an anode and a separator, the separator being disposed between the cathode and the anode, the separator including a porous substrate and a porous layer, and the porous layer being disposed on a surface of the porous substrate and including inorganic particles and a binder, where a ratio of a puncture elongation of the porous substrate to a puncture force of the porous substrate is about 1.5 mm/N to about 25 mm/N. A lithium-ion battery including the separator, provided by the present application, improves the safety performance of the lithium-ion battery.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: March 1, 2022
    Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
    Inventor: DongYang Guo
  • Publication number: 20210184316
    Abstract: A separator including a porous substrate and a porous layer. The porous layer is disposed on a surface of the porous substrate and includes inorganic particles and a binder. The porous substrate has an absolute plastic deformation rate in a first direction ranging from about 40% to about 1800%. By using the separator provided in the present application, the safety performance of lithium ion batteries is improved.
    Type: Application
    Filed: February 19, 2021
    Publication date: June 17, 2021
    Inventors: KeBing Guo, DongYang Guo, GengJin Kong, XingHua Tao
  • Patent number: 10964927
    Abstract: The present application relates to a separator and an electrochemical device. The present application provides a separator comprising: a porous substrate and a porous layer, wherein the porous layer is disposed on a surface of the porous substrate and comprises inorganic particles and a binder. The porous substrate has an absolute plastic deformation rate in a first direction ranging from about 40% to about 1800%. By using the separator provided in the present application, the safety performance of lithium ion batteries is improved.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: March 30, 2021
    Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
    Inventors: Kebing Guo, Dongyang Guo, Gengjin Kong, Xinghua Tao
  • Publication number: 20210036292
    Abstract: The present application relates to a multilayer separator and a device using the same. Specifically, the present application provides a multilayer separator comprising at least one first porous substrate and at least one second porous substrate, wherein the peeling strength between the first porous substrate and the second porous substrate is in a range of 2 N/m to 50 N/m, and the first porous substrate has an obturator temperature of lower than 135° C. The multilayer separator provided by the present application can effectively guarantee the safety and electrochemical performance of the electrochemical device.
    Type: Application
    Filed: December 16, 2019
    Publication date: February 4, 2021
    Inventor: DongYang GUO
  • Publication number: 20190393467
    Abstract: The present application relates to a separator and an electrochemical device. The present application provides a separator comprising: a porous substrate and a porous layer, wherein the porous layer is disposed on a surface of the porous substrate and comprises inorganic particles and a binder. The porous substrate has an absolute plastic deformation rate in a first direction ranging from about 40% to about 1800%. By using the separator provided in the present application, the safety performance of lithium ion batteries is improved.
    Type: Application
    Filed: November 28, 2018
    Publication date: December 26, 2019
    Inventors: Kebing GUO, Dongyang GUO, Gengjin KONG, Xinghua TAO
  • Publication number: 20190379022
    Abstract: Embodiments of the present application relate to an electrochemical device. Specifically, the electrochemical device includes a cathode, an anode and a separator, the separator being disposed between the cathode and the anode, the separator including a porous substrate and a porous layer, and the porous layer being disposed on a surface of the porous substrate and including inorganic particles and a binder, where a ratio of a puncture elongation of the porous substrate to a puncture force of the porous substrate is about 1.5 mm/N to about 25 mm/N. A lithium-ion battery including the separator, provided by the present application, improves the safety performance of the lithium-ion battery.
    Type: Application
    Filed: October 17, 2018
    Publication date: December 12, 2019
    Inventor: DongYang GUO
  • Publication number: 20190267595
    Abstract: The present disclosure provides a separator and a lithium ion battery. The separator includes a porous substrate; and a porous layer disposed on at least one surface of the porous substrate. The porous layer includes inorganic particles and a binder, and an iron content in the porous layer is not more than 2100 ppm.
    Type: Application
    Filed: November 1, 2018
    Publication date: August 29, 2019
    Inventors: Gengjin KONG, Dongyang Guo, Xinghua Tao
  • Publication number: 20190267596
    Abstract: The present invention provides a separator and a lithium-ion battery. The separator comprises a porous substrate, and a first coating layer arranged on at least one surface of the porous substrate, wherein the first coating layer comprises an aromatic polyamide. An aramid coating layer is used in the present invention, the aromatic polyamide in the aramid coating layer swells or plasticizes under the action of a solvent and a lithium salt in the electrolyte at high temperature or normal temperature, to increase the elongation of the separator, while improving the safety performance of the lithium-ion battery by interaction between the aramid coating layer and the electrode active material or the binder.
    Type: Application
    Filed: January 28, 2019
    Publication date: August 29, 2019
    Inventors: Dongyang Guo, Gengjin Kong, Kebing Guo, Xinghua Tao