Patents by Inventor Yongchang LI

Yongchang LI 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).

  • LLC RESONANT CONVERTER AND CONTROL METHOD THEREFOR
    Publication number: 20240380317
    Abstract: A control method for an LLC resonant converter includes: dividing an input voltage into four voltage segments: a low voltage, a medium-low voltage, a medium-high voltage, and a high voltage, and correspondingly adopting a full-bridge PFM control mode, a full-bridge PWM control mode, a half-bridge PFM control mode, and a half-bridge PWM control mode respectively. This control method is applicable to a wide input voltage range to achieve steady-state control over an LLC resonant converter, and can maintain a high efficiency of the LLC resonant converter within the whole input voltage range and can also be used in scenarios where a wide output voltage occurs.
    Type: Application
    Filed: September 16, 2022
    Publication date: November 14, 2024
    Applicant: MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO., LTD.
    Inventors: Yongchang LI, Zhishen WANG, Hui WU, Zhiqun YIN
  • Lithium cobalt metal oxide powder, method for making the same, and method for determining content of cobalt (II,III) oxide
    Patent number: 11784309
    Abstract: A lithium cobalt metal oxide powder is disclosed in the present disclosure. The lithium cobalt metal oxide powder has a coating structure. The lithium cobalt metal oxide powder includes a lithium cobalt metal oxide matrix. The lithium cobalt metal oxide powder further includes a Co3O4 coating layer. A general formula of the lithium cobalt metal oxide powder is LiaCo1-x-yMxNyO2·rCo3O4, wherein 0.002<r?0.05, 1?a?1.1, 0<x?0.02, 0?y?0.005, and a<1+3r; M is a doping element; and N is a coating element. A method for making the lithium cobalt metal oxide powder as described above and a method for determining a content of Co3O4 therein are further provided. The material made in the present disclosure has an excellent electrochemical performance.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: October 10, 2023
    Assignee: BASF SHANSHAN BATTERY MATERIALS CO., LTD.
    Inventors: Yongchang Li, Hong Dong, Xuyao Hu, Hui Shi, Shuang Chen, Xiangkang Jiang, Xu Li, Zhihua Li
  • LITHIUM COBALT METAL OXIDE POWDER, METHOD FOR MAKING THE SAME, AND METHOD FOR DETERMINING CONTENT OF COBALT (II,III) OXIDE
    Publication number: 20210202939
    Abstract: A lithium cobalt metal oxide powder is disclosed in the present disclosure. The lithium cobalt metal oxide powder has a coating structure. The lithium cobalt metal oxide powder includes a lithium cobalt metal oxide matrix. The lithium cobalt metal oxide powder further includes a Co3O4 coating layer. A general formula of the lithium cobalt metal oxide powder is LiaCo1-x-yMxNyO2.rCo3O4, wherein 0.002<r?0.05, 1?a?1.1, 0<x?0.02, 0?y?0.005, and a<1+3r; M is a doping element; and N is a coating element. A method for making the lithium cobalt metal oxide powder as described above and a method for determining a content of Co3O4 therein are further provided. The material made in the present disclosure has an excellent electrochemical performance.
    Type: Application
    Filed: April 26, 2018
    Publication date: July 1, 2021
    Inventors: Yongchang LI, Hong DONG, Xuyao HU, Hui SHI, Shuang CHEN, Xiangkang JIANG, Xu LI, Zhihua LI