Patents by Inventor Yongfa LI

Yongfa 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).

  • Publication number: 20250088023
    Abstract: A charging apparatus and a charging control method, so that only a small quantity of relays are required when an output voltage range and an output power of a power converter are increased. This effectively reduces circuit costs of the charging apparatus, and effectively simplifies a control procedure for serial connection or parallel connection between a plurality of outputs of the power converter. The apparatus includes a first power converter, a first relay, and a second relay. The first power converter includes a first output end and a second output end. Conduction states of the first relay and the second relay are controlled, to control serial connection or parallel connection between the plurality of output ends of the first power converter.
    Type: Application
    Filed: November 22, 2024
    Publication date: March 13, 2025
    Applicant: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Biao HU, Yang LIU, Yongfa LI
  • Patent number: 12203182
    Abstract: The disclosure discloses a preparation method and application of a non-noble metal single atom catalyst, and belongs to the technical fields of chemistry, chemical engineering and material science. According to the disclosure, cheap raw materials and simple method are used to prepare the single atom catalyst. In essence, metal is anchored on light-absorbing carrier in a single atom form under irradiation to produce the single atom catalyst. In the disclosure, the non-noble metal single atom catalyst is prepared by using a photochemical synthetic route for the first time. The single atom catalyst synthesized in the disclosure is dispersed on the surface of photoactive substance. Using nickel single atom as a co-catalyst in photocatalytic water splitting to produce hydrogen, the cost is low and the catalytic efficiency is greatly improved compared with other types of non-noble metal modified composite photocatalysts.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: January 21, 2025
    Assignee: Jiangnan University
    Inventors: Yuming Dong, Guangli Wang, Pingping Jiang, Huizhen Zhang, Liang Jian, Ji Li, Yongfa Zhu, Chengsi Pan, Jinze Lv, Yan Leng, Pingbo Zhang
  • Publication number: 20240291389
    Abstract: An LLC resonant conversion circuit includes a plurality of harmonic circuits. In each harmonic circuit, a plurality of transformers are electrically connected to each other and are electrically connected to one transformer in another harmonic circuit, so that the harmonic circuits are connected in a crossed manner. In this way, current or voltage of an electrical signal in one harmonic circuit can be distributed to another harmonic circuit. Without adding any component, this achieves the same current value for electrical signals in the harmonic circuits when the harmonic circuits are connected in parallel, and achieves the same voltage value for electrical signals in the harmonic circuits when the harmonic circuits are connected in series. This effectively reduces complexity of a control policy for the entire LLC resonant conversion circuit and also reduces costs of the LLC resonant conversion circuit.
    Type: Application
    Filed: May 3, 2024
    Publication date: August 29, 2024
    Applicant: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Jiansheng CHEN, Yang LIU, Yongfa LI
  • Patent number: 11670473
    Abstract: The power distribution system includes a plug-in frame, a board located in the plug-in frame, and at least one circuit breaker. The board includes a plurality of slot positions, a position signal acquisition apparatus is disposed on the board, and the position signal acquisition apparatus is configured to acquire an address of any slot position on the board. A first end of each circuit breaker extends into the plug-in frame and is plugged to a slot position on the board, and a second end of the circuit breaker is located at an open end of the plug-in frame. The open end of the plug-in frame is provided with an address code, the address code corresponds to an address of a slot position on the board, and each circuit breaker corresponds to at least one address code.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: June 6, 2023
    Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
    Inventors: Yanxing Yang, Wei Guo, Xiaolong Lu, Zheng Li, Zhigang Sheng, Yongfa Li, Hongbing Wang
  • Publication number: 20220230828
    Abstract: The power distribution system includes a plug-in frame, a board located in the plug-in frame, and at least one circuit breaker. The board includes a plurality of slot positions, a position signal acquisition apparatus is disposed on the board, and the position signal acquisition apparatus is configured to acquire an address of any slot position on the board. A first end of each circuit breaker extends into the plug-in frame and is plugged to a slot position on the board, and a second end of the circuit breaker is located at an open end of the plug-in frame. The open end of the plug-in frame is provided with an address code, the address code corresponds to an address of a slot position on the board, and each circuit breaker corresponds to at least one address code.
    Type: Application
    Filed: January 19, 2022
    Publication date: July 21, 2022
    Inventors: Yanxing YANG, Wei GUO, Xiaolong LU, Zheng LI, Zhigang SHENG, Yongfa LI, Hongbing WANG
  • Patent number: 9936353
    Abstract: A search request transmitted by a first mobile terminal may be received. The search request may carry location information of the first mobile terminal, when the first mobile terminal transmits the search request. A corresponding grid number may be obtained, based on the location information. The grid number is configured to identify a preset longitude and latitude range of the earth sphere. Information searching for may be obtained based on the grid number. Information searched out may be transmitted to the first mobile terminal.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: April 3, 2018
    Assignee: Tencent Technology (Shenzhen) Company Limited
    Inventors: Yuanfang Lv, Yongfa Li, Qiong Wang, Yuxiang Fan, Huaheng Fan
  • Publication number: 20150281903
    Abstract: A search request transmitted by a first mobile terminal may be received. The search request may carry location information of the first mobile terminal, when the first mobile terminal transmits the search request. A corresponding grid number may be obtained, based on the location information. The grid number is configured to identify a preset longitude and latitude range of the earth sphere. Information searching for may be obtained based on the grid number. Information searched out may be transmitted to the first mobile terminal.
    Type: Application
    Filed: June 11, 2015
    Publication date: October 1, 2015
    Inventors: Yuanfang LV, Yongfa LI, Qiong WANG, Yuxiang FAN, Huaheng FAN