Patents by Inventor Changming Qu

Changming Qu 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: 20250023094
    Abstract: A negative electrode active material of the electrochemical apparatus includes a first active material and a second active material; where a gram capacity of the first active material is less than that of the second active material; a discharge operating voltage range of the first active material includes a first voltage range that is not greater than an upper limit of a discharge operating voltage of the second active material; the electrochemical apparatus operates at a first discharge cut-off voltage and a first charge cut-off voltage during a first time period; the electrochemical apparatus operates at a second discharge cut-off voltage and a second charge cut-off voltage during a second time period; and the first discharge cut-off voltage and the second discharge cut-off voltage are both within the first voltage range.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Bangkun ZOU, Changming QU
  • Publication number: 20240313277
    Abstract: An electronic apparatus, and a storage medium. The electrochemical apparatus control method includes steps (a) and (b): (a) when an internal resistance change rate of the electrochemical apparatus is smaller than a first threshold, performing charging/discharging at a first voltage and a second voltage; and (b) when the internal resistance change rate of the electrochemical apparatus is greater than or equal to the first threshold, raising a discharge cut-off voltage of the electrochemical apparatus by a first raising amount. The internal resistance change rate of the electrochemical apparatus is monitored and the electrochemical apparatus is controlled based on the internal resistance change rate. This improves the cycling performance of the electrochemical apparatus while guaranteeing high energy density of the electrochemical apparatus.
    Type: Application
    Filed: May 24, 2024
    Publication date: September 19, 2024
    Applicant: Ningde Amperex Technology Limited
    Inventors: Bangkun ZOU, Changming QU, Fan YANG
  • Publication number: 20240297339
    Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.
    Type: Application
    Filed: May 13, 2024
    Publication date: September 5, 2024
    Applicant: Ningde Amperex Technology Limited
    Inventors: Chaowang LIN, Fan YANG, Yisong SU, Huawei ZHONG, Changming QU, Xiaozhen ZHANG
  • Patent number: 12015118
    Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: June 18, 2024
    Assignee: Ningde Amperex Technology Limited
    Inventors: Chaowang Lin, Fan Yang, Yisong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
  • Patent number: 11929483
    Abstract: The present application provides a positive electrode and a lithium-ion battery. The positive electrode comprises a current collector; a first active material layer comprising a first active material; and a second active material layer; wherein the first active material layer is arranged between the current collector and the second active material layer, the first active material layer comprises a first active material, and the first active material is at least one selected from a group consisting of a modified lithium transition metal oxide positive electrode material and a modified lithium iron phosphate. The positive electrode of the present application helps to improve the thermal stability of the lithium-ion battery, and the improvement of the thermal stability may reduce the proportion of the thermal runaway when the lithium-ion battery is internally short-circuited so that the safety performance of the lithium-ion battery is improved.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: March 12, 2024
    Assignee: Ningde Amperex Technology Limited
    Inventors: Xiaozhen Zhang, Fan Yang, Changming Qu, Yisong Su, Chaowang Lin, Huawei Zhong
  • Patent number: 11664528
    Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used in the present application to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: May 30, 2023
    Assignee: Ningde Amperex Technology Limited
    Inventors: Chaowang Lin, Fan Yang, Yisong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
  • Publication number: 20220223902
    Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.
    Type: Application
    Filed: March 29, 2022
    Publication date: July 14, 2022
    Applicant: Ningde Amperex Technology Limited
    Inventors: Chaowang LIN, Fan YANG, Yisong SU, Huawei ZHONG, Changming QU, Xiaozhen ZHANG
  • Publication number: 20220223903
    Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used in the present application to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.
    Type: Application
    Filed: March 29, 2022
    Publication date: July 14, 2022
    Applicant: Ningde Amperex Technology Limited
    Inventors: Chaowang LIN, Fan YANG, Yisong SU, Huawei ZHONG, Changming QU, Xiaozhen ZHANG
  • Patent number: 11322774
    Abstract: The present application provides an electrode, an electrochemical device, and an electronic device. The electrode includes: a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used in the present application to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: May 3, 2022
    Assignee: Ningde Amperex Technology Limited
    Inventors: Chaowang Lin, Fan Yang, YiSong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
  • Publication number: 20200266483
    Abstract: The present application provides an electrode, an electrochemical device, and an electronic device. The electrode includes: a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used in the present application to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.
    Type: Application
    Filed: May 7, 2020
    Publication date: August 20, 2020
    Inventors: Chaowang Lin, Fan Yang, YiSong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
  • Patent number: 10693181
    Abstract: The present application provides an electrode and a lithium-ion battery. The electrode comprises: a current collector; a first active material layer comprising a first active material; and a second active material layer comprising a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on at least one surface of the current collector, and a ratio of an average particle size of the second active material to an average particle size of the first active material is from 1:1 to 40:1. The active material layer is used in the present application to ensure that the lithium-ion battery does not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the lithium-ion battery.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: June 23, 2020
    Assignee: Ningde Amperex Technology Limited
    Inventors: Chaowang Lin, Fan Yang, Yisong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
  • Publication number: 20190267612
    Abstract: The present application provides a positive electrode and a lithium-ion battery. The positive electrode comprises a current collector; a first active material layer comprising a first active material; and a second active material layer; wherein the first active material layer is arranged between the current collector and the second active material layer, the first active material layer comprises a first active material, and the first active material is at least one selected from a group consisting of a modified lithium transition metal oxide positive electrode material and a modified lithium iron phosphate. The positive electrode of the present application helps to improve the thermal stability of the lithium-ion battery, and the improvement of the thermal stability may reduce the proportion of the thermal runaway when the lithium-ion battery is internally short-circuited so that the safety performance of the lithium-ion battery is improved.
    Type: Application
    Filed: October 24, 2018
    Publication date: August 29, 2019
    Inventors: Xiaozhen Zhang, Fan Yang, Changming Qu, Yisong Su, Chaowang Lin, Huawei Zhong
  • Publication number: 20190267664
    Abstract: The present application provides an electrode and a lithium-ion battery. The electrode comprises: a current collector; a first active material layer comprising a first active material; and a second active material layer comprising a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on at least one surface of the current collector, and a ratio of an average particle size of the second active material to an average particle size of the first active material is from 1:1 to 40:1. The active material layer is used in the present application to ensure that the lithium-ion battery does not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the lithium-ion battery.
    Type: Application
    Filed: June 5, 2018
    Publication date: August 29, 2019
    Inventors: Chaowang Lin, Fan Yang, Yisong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang