Patents by Inventor Shiwei SHU

Shiwei SHU 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).

  • Patent number: 11846675
    Abstract: A battery temperature estimation method includes fitting, when a battery is in an offline state, a first function relationship according to corresponding admittances of the battery at different test temperatures, and obtaining a temperature distribution model of the battery according to the shape and the size of the battery, and determining a second function relationship corresponding to internal temperatures and a surface temperature by combining with the first function relationship. The second function relationship is used for estimating the internal temperature of the battery by using the surface temperature and the admittances of the battery.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: December 19, 2023
    Assignee: BYD COMPANY LIMITED
    Inventors: Xiaoqian Li, Tianyu Feng, Sijia Liu, Yonggang Yin, Shiwei Shu
  • Publication number: 20230236257
    Abstract: A method for generating an electrochemical impedance spectrum for a battery includes: collecting, in a discharge state of a battery, battery discharge information of the battery periodically according to a preset collection interval, where the battery discharge information includes collection time, and current information and voltage information associated with the collection time; performing Fourier transform according to the collection interval and battery discharge information, to obtain multiple frequency-based first battery signals; determining a second battery signal from the multiple first battery signals, where the second battery signal includes a voltage signal greater than or equal to a preset voltage threshold; and determining an electrochemical impedance at a corresponding frequency according to the second battery signal, and constructing an electrochemical impedance spectrum according to all the electrochemical impedance.
    Type: Application
    Filed: March 24, 2023
    Publication date: July 27, 2023
    Inventors: Tianyu FENG, Linwang DENG, Shiwei SHU, Xiaoqian LI
  • Publication number: 20230231403
    Abstract: A battery charging method based on lithium plating detection includes: acquiring a battery charging strategy table after receiving a battery charging instruction; charging a battery according to a charging current in the battery charging strategy table, and performing at least one charging lithium plating detection on the battery during the charging of the battery, to obtain a first lithium plating detection result; continuing the charging of the battery according to the charging current and the charging lithium plating detection of the battery when no lithium plating phenomenon occurs, and stopping the charging lithium plating detection when the lithium plating phenomenon occurs or the charging of the battery is completed; and updating the charging current according to a preset first current reduction strategy when the lithium plating phenomenon occurs, and continuing the charging of the battery according to the updated charging current until the charging is completed.
    Type: Application
    Filed: March 24, 2023
    Publication date: July 20, 2023
    Inventors: Tianyu FENG, Shiwei SHU, Linwang DENG, Xiaoqian LI
  • Publication number: 20230221373
    Abstract: A method for detecting a lithium plating state of a battery includes regularly collecting a voltage of a battery after the end of charging at a preset time interval after the battery is in an idle state, and associatively storing the collected voltage and a collection time as voltage data; constructing a time-differential voltage curve in a voltage-time coordinate system according to the voltage data; detecting whether a characteristic peak voltage exists in the time-differential voltage curve; and sending a warning message when detecting that the characteristic peak voltage exists in the time-differential voltage curve.
    Type: Application
    Filed: March 23, 2023
    Publication date: July 13, 2023
    Inventors: Linwang DENG, Tianyu FENG, Shiwei SHU, Sijia LIU
  • Publication number: 20220357399
    Abstract: A battery temperature estimation method includes fitting, when a battery is in an offline state, a first function relationship according to corresponding admittances of the battery at different test temperatures, and obtaining a temperature distribution model of the battery according to the shape and the size of the battery, and determining a second function relationship corresponding to internal temperatures and a surface temperature by combining with the first function relationship. The second function relationship is used for estimating the internal temperature of the battery by using the surface temperature and the admittances of the battery.
    Type: Application
    Filed: September 25, 2020
    Publication date: November 10, 2022
    Inventors: Xiaoqian LI, Tianyu FENG, Sijia LIU, Yonggang YIN, Shiwei SHU