Patents by Inventor Yongfa Zhu

Yongfa Zhu 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: 11329521
    Abstract: This application provides a wireless charging foreign object detection apparatus, applied to the field of wireless charging technologies. The detection apparatus includes: an excitation coil configured to provide a time-varying magnetic field, detection coils configured to detect a foreign object, and a processor configured to determine whether a foreign object exists. The detection coils may include two detection coils, or may include at least three detection coils. The at least three detection coils may be further configured to eliminate a detection blind spot.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: May 10, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mou He, Wei Chen, Yongfa Zhu, Shaojie Feng
  • Publication number: 20220042184
    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: Application
    Filed: October 21, 2021
    Publication date: February 10, 2022
    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: 20210210991
    Abstract: This application provides a wireless charging foreign object detection apparatus, applied to the field of wireless charging technologies. The detection apparatus includes: an excitation coil configured to provide a time-varying magnetic field, detection coils configured to detect a foreign object, and a processor configured to determine whether a foreign object exists. The detection coils may include two detection coils, or may include at least three detection coils. The at least three detection coils may be further configured to eliminate a detection blind spot.
    Type: Application
    Filed: March 23, 2021
    Publication date: July 8, 2021
    Inventors: Mou HE, Wei CHEN, Yongfa ZHU, Shaojie FENG
  • Publication number: 20210152028
    Abstract: A wireless charging device is disclosed, which includes: a charging pad and a first controller. The charging pad includes a plurality of charging units, the plurality of charging units include a first charging unit and a second charging unit. When a first electromagnetic coupling strength between the first charging unit and the to-be-charged device is greater than or equal to a first threshold, the first controller is configured to control the first charging unit to separately charge the to-be-charged device. When both the second electromagnetic coupling strength between the second charging unit and the to-be-charged device and the first electromagnetic coupling strength are less than a first threshold, and are greater than or equal to a second threshold, the first controller is configured to control the first charging unit and the second charging unit to jointly charge the target to-be-charged device.
    Type: Application
    Filed: January 28, 2021
    Publication date: May 20, 2021
    Inventors: Yongfa ZHU, Tao DING, Heqian YANG, Changsheng PEI, Zhi ZHANG
  • Publication number: 20210151250
    Abstract: A coil module includes a first planar coil winding that includes a plurality of turns of coils, at least one turn of first coil in the plurality of turns of coils includes at least one first cutting opening, and the first cutting opening divides the first coil into a first outer side part and a first inner side part along an extension direction of the coil, and a first target side part includes a first cutting groove, the first target side part is at least one of the first outer side part and the first inner side part, an extension direction of the first cutting groove is the same as an extension direction of the first target side part, and a width of a single first cutting groove is less than or equal to a width of a single first cutting opening.
    Type: Application
    Filed: January 26, 2021
    Publication date: May 20, 2021
    Inventors: Yongfa Zhu, Xiaowei Chen, Tao Ding, Zhiqiang Zeng, Chang Yang, Zhaodong He
  • Publication number: 20210151247
    Abstract: A coil winding includes a first part of coils and a second part of coils located on opposite sides of an insulation layer, where the first part of coils comprises a first segment of conducting wire, and the second part of coils comprises a second segment of conducting wire. The first segment of conducting wire and the second segment of conducting wire each includes N cutting openings. Both the first segment of conducting wire and the second segment of conducting wire are divided into N+1 sub conducting wires by the N cutting openings. The N+1 sub conducting wires in the first segment of conducting wire and the N+1 sub conducting wires in the second segment of conducting wire are electrically coupled in a one-to-one manner to form N+1 pairs of sub conducting wires including a crossover structure.
    Type: Application
    Filed: January 26, 2021
    Publication date: May 20, 2021
    Inventors: Yongfa Zhu, Xiaowei Chen, Zhiqiang Zeng
  • Publication number: 20210142942
    Abstract: A coil module includes a first planar coil winding and a second planar coil winding. A first coil of the first planar coil winding includes a first outer side part and a first inner side part. A first coil of the second planar coil winding includes a second outer side part and a second inner side part. An end part of the first outer side part is connected to an end part of the second inner side part, and an end part of the second outer side part is connected to an end part of the first inner side part.
    Type: Application
    Filed: January 22, 2021
    Publication date: May 13, 2021
    Inventors: Changsheng Pei, Yongfa Zhu, Zhiqiang Zeng
  • Publication number: 20210075261
    Abstract: A wireless charging apparatus for a wireless power transmission system. The apparatus includes a voltage conversion circuit, an excitation coil, n first resonance coils, and a controller, where n is greater than or equal to 3. The voltage conversion circuit is connected to the excitation coil and converts a power grid voltage into a high-frequency alternating current voltage. The excitation coil generates a magnetic field based on the high-frequency alternating current voltage. The n first resonance coils are arranged in different directions and conducts the magnetic field, and the controller monitors power statuses of the first resonance coils, and enable or disable the first resonance coils based on the power statuses.
    Type: Application
    Filed: November 18, 2020
    Publication date: March 11, 2021
    Inventors: Hongliang CHEN, Wei CHEN, Changsheng PEI, Yongfa ZHU
  • Publication number: 20210063599
    Abstract: A detection coil includes a first group of coils, a second group of coils, and a third group of coils that are continuously wound and coaxial, and the second group of coils is located between the first group of coils and the third group of coils. A coil that generates the first magnetic field is coaxial with the first group of coils, the second group of coils, and the third group of coils. A sum of the induced electromotive forces of the first group of coils, the second group of coils, and the third group of coils is zero. When a metal foreign matter exists, a sum of the induced electromotive forces of the first group of coils, the second group of coils, and the third group of coils is not zero.
    Type: Application
    Filed: November 12, 2020
    Publication date: March 4, 2021
    Inventors: Mou He, Wei Chen, Yongfa Zhu
  • Publication number: 20210066948
    Abstract: This application provides a charging pad used in a wireless charger. The charging pad can be wound. Specifically, the charging pad includes a rigid region and a flexible region, and a structure of the rigid region is different from a structure of the flexible region. A rigid support plate is disposed in the rigid region, and a metal line in the flexible region is in a metal hinge structure or is a bendable metal conducting wire. In addition, this application further provides a wireless charger to which the charging pad is applied.
    Type: Application
    Filed: November 12, 2020
    Publication date: March 4, 2021
    Inventors: Yongfa ZHU, Xiaowei CHEN, Jin QIU, Xueyan HUANG, Tao DING
  • Publication number: 20210012959
    Abstract: This application discloses a coil module, which includes: an insulation layer, a first planar coil winding, and a second planar coil winding, one turn of coil of the first planar coil winding includes a first portion, a second portion, and a first connection part, and one turn of coil of the second planar coil winding includes a third portion, a fourth portion, and a second connection part. The first connection portion connects an outer side part of the first portion and an inner side part of the second portion, the second connection portion connects an inner side part of the third portion and an outer side part of the fourth portion, and there is an overlap between a projection of the first connection portion on a plane of the insulation layer and a projection of the second connection portion on the plane of the insulation layer.
    Type: Application
    Filed: September 25, 2020
    Publication date: January 14, 2021
    Inventors: Changsheng Pei, Yongfa Zhu, Zhiqiang Zeng, Xiaowei Chen
  • Patent number: 10790079
    Abstract: A thin film inductor includes a first magnetic thin film and a second magnetic thin film that are adjacent, the first magnetic thin film is nested in the second magnetic thin film, and a relative magnetic permeability of the first magnetic thin film is less than a relative magnetic permeability of the second magnetic thin film, and a difference between the relative magnetic permeability of the first magnetic thin film and the relative magnetic permeability of the second magnetic thin film is greater than or equal to a first threshold, where when a magnetic induction intensity of the second magnetic thin film reaches a saturated magnetic induction intensity of the second magnetic thin film, a magnetic induction intensity of the first magnetic thin film is less than or equal to a saturated magnetic induction intensity of the first magnetic thin film.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: September 29, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Shijun Yang, Heqian Yang, Yongfa Zhu, Wei Chen
  • Publication number: 20200279686
    Abstract: This application describes a coil. The coil includes an output terminal, an input terminal, and a wire-winding part that is connected between the output terminal and the input terminal. A slot is disposed on at least a part of the wire-winding part, and a depth of the slot in any direction of a cross section of the wire-winding part is less than or equal to a distance between two points that are the farthest away from each other on the cross section of the wire-winding part. The wire-winding part is a metal conductor made through spiral winding. The input terminal and the output terminal are configured to connect the wire-winding part to an external circuit.
    Type: Application
    Filed: May 19, 2020
    Publication date: September 3, 2020
    Inventors: Changsheng PEI, Yongfa ZHU, Heqian YANG, Jinsen CAI
  • Publication number: 20200280216
    Abstract: A wireless charging system includes a transmitter and a receiver, the transmitter includes a transmitter coil and a first series matching capacitor, the transmitter coil is connected to the first series matching capacitor in series to form a first oscillation circuit, and the first oscillation circuit is configured to transfer power to the receiver, and the receiver includes a receiver coil and a second series matching capacitor, the receiver coil is connected to the second series matching capacitor in series to form a second oscillation circuit, and the second oscillation circuit is configured to receive the power transferred by the first oscillation circuit.
    Type: Application
    Filed: May 20, 2020
    Publication date: September 3, 2020
    Inventors: Changsheng Pei, Zhiqiang Zeng, Yongfa Zhu
  • Publication number: 20200005985
    Abstract: A thin film inductor includes a first magnetic thin film and a second magnetic thin film that are adjacent, the first magnetic thin film is nested in the second magnetic thin film, and a relative magnetic permeability of the first magnetic thin film is less than a relative magnetic permeability of the second magnetic thin film, and a difference between the relative magnetic permeability of the first magnetic thin film and the relative magnetic permeability of the second magnetic thin film is greater than or equal to a first threshold, where when a magnetic induction intensity of the second magnetic thin film reaches a saturated magnetic induction intensity of the second magnetic thin film, a magnetic induction intensity of the first magnetic thin film is less than or equal to a saturated magnetic induction intensity of the first magnetic thin film.
    Type: Application
    Filed: September 3, 2019
    Publication date: January 2, 2020
    Inventors: Shijun Yang, Heqian Yang, Yongfa Zhu, Wei Chen
  • Publication number: 20180301270
    Abstract: A thin film inductor is disclosed, which includes a thin film magnetic core. The thin film magnetic core includes at least one magnetic thin film. In each magnetic thin film, at least one type-1 gap is provided. A length direction of the type-1 gap is parallel to a direction of hard magnetization of the magnetic thin film. If the thin film magnetic core comprises at least two magnetic thin films, the at least two magnetic thin films are laminated and overlap each other. A sum of widths of all type-1 gaps in each magnetic thin film is the same.
    Type: Application
    Filed: June 22, 2018
    Publication date: October 18, 2018
    Inventors: Heqian Yang, Yongfa Zhu, Xiaolong Luo
  • Patent number: 9699901
    Abstract: A golden finger and a board edge interconnecting device are disclosed. The golden finger includes a printed circuit board (PCB) surface layer and at least one PCB inner layer, where a metal foil of the PCB inner layer is connected to a metal foil of the PCB surface layer through a current-carrying structure, so that a current-carrying channel of the golden finger passes through the PCB surface layer and the PCB inner layer. The board edge interconnecting device includes the foregoing golden finger. In the embodiments, a current-carrying capacity of a PCB in the golden finger is increased without increasing a size and thickness of a copper foil of the PCB in the golden finger, thereby effectively improving the current-carrying capacity of the PCB in the golden finger.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: July 4, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Kai Yao, Yongfa Zhu, Yingpei Huang
  • Patent number: 9484142
    Abstract: The present invention discloses a circuit board, including a substrate and a magnetic core, where the magnetic core is embedded into the substrate, at least one turn of a winding conductor wound around the magnetic core is arranged on the substrate, each turn of the winding conductor includes a first end-surface conductor and a second end-surface conductor that are separately arranged on two ends of the magnetic core, and each turn of the winding conductor further includes a first side-surface conductor that penetrates through the magnetic core from an inner side of the magnetic core and a second side-surface conductor that penetrates through the magnetic core from an outer side of the magnetic core. The circuit board and the power conversion apparatus having the circuit board provided by the present invention, achieve larger inductance, save materials, and reduce cost for fabricating a power conversion apparatus.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: November 1, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Quan Guo, Yongfa Zhu, Chengzhang Han
  • Patent number: 9425686
    Abstract: The present invention provides a voltage conversion device and a method for adjusting common mode noise impedance, which relates to the circuit field, and enables a common mode impedance value of a noise source and an impedance value of an EMI filter to enter a mismatch state, so as to reduce a restriction on design of the EMI filter, so that a size of the EMI filter is smaller and utilization efficiency of the EMI filter is higher. The method is: adjusting a common mode impedance value of a noise source by adjusting a balanced impedance value in a balanced winding on a voltage conversion device, so as to enable the common mode impedance value of the noise source and an impedance value of an EMI filter to enter a mismatch state.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: August 23, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Feng Zheng, Changsheng Pei, Yongfa Zhu
  • Publication number: 20160211737
    Abstract: An active filter, which may effectively suppress the low-frequency noise, includes a main circuit and a control circuit. The control circuit is configured to detect a first current output by a negative electrode of an input end of a conversion circuit to acquire an alternating current component (harmonic component) in the first current, and generate a control signal according to the harmonic component. The main circuit is configured to generate, under the control of the control signal, a second current having a phase opposite to a phase of the harmonic component, so that a source current formed after the first current and the second current pass through a power source is a direct current.
    Type: Application
    Filed: March 29, 2016
    Publication date: July 21, 2016
    Inventors: Dan Yang, Qinghai Wang, Yongfa Zhu