Abstract: A wireless charging apparatus for a wireless power transmission system and a method are provided. 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.

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.

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.

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.

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.

Abstract: This application provides a conversion circuit, a switch-mode power supply, and an electronic device. The conversion circuit mainly includes a first branch circuit and a second branch circuit. Input sides of the first branch circuit and the second branch circuit are connected in series, and output sides of the first branch circuit and the second branch circuit are connected in parallel; or input sides of the first branch circuit and the second branch circuit are connected in parallel, and output sides of the first branch circuit and the second branch circuit are connected in series. This implementation helps improve efficiency of the conversion circuit. When an inductor is disposed in the conversion circuit, a size of the inductor is further reduced, to improve integration.

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.

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.

Abstract: Embodiments of this application disclose a wireless charging system. The wireless charging system includes a first electronic device, a wireless charging device, and a second electronic device. The wireless charging device is located between the first electronic device and the second electronic device. The wireless charging device is an auxiliary device of the first electronic device and is physically connected to the first electronic device, the wireless charging device includes a receiver circuit and a housing, the receiver circuit includes a receiver coil, and the receiver coil is located on an inner side of the housing. The first electronic device is configured to: charge the wireless charging device, charge the second electronic device through the wireless charging device, and receive power from the second electronic device through the wireless charging device.

Abstract: An osmium-containing conjugated polymer and methods thereof. A structural formula of the osmium-containing conjugated polymer is formula I, a reaction formula of the osmium-containing conjugated polymer is a formula II.

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.

Abstract: A photothermal catalytic method for production of hydrogen peroxide without a sacrificial reagent on the basis of a porphyrin-based supermolecule is provided. The method includes the following steps: uniformly mixing a porphyrin-based supermolecule photocatalyst with a concentration of 0.3-1.5 g/L with ultrapure water, conducting irradiation with a visible light for a period of time under stirring at a temperature of 40-80° C. and an O2 flow rate of 50-150 mL/min, and then filtering and concentrating a reaction liquid to obtain an aqueous hydrogen peroxide solution with a high concentration. According to the new photothermal catalytic method for preparing the hydrogen peroxide provided in the present disclosure, no organic solvent (such as ethanol, isopropanol and benzyl alcohol) is used as a sacrificial reagent, and the method is environmentally friendly and free of pollution.

Abstract: Embodiments of this application disclose a wireless charging system. The wireless charging system includes a first electronic device, a wireless charging device, and a second electronic device. The wireless charging device is located between the first electronic device and the second electronic device. The wireless charging device is an auxiliary device of the first electronic device and is physically connected to the first electronic device, the wireless charging device includes a receiver circuit and a housing, the receiver circuit includes a receiver coil, and the receiver coil is located on an inner side of the housing. The first electronic device is configured to: charge the wireless charging device, charge the second electronic device through the wireless charging device, and receive power from the second electronic device through the wireless charging device.

Abstract: This application discloses a wireless charging system, and pertains to the field of wireless charging technologies. The system includes: a transmit apparatus and a receive apparatus; the transmit apparatus includes an inverter circuit and two transmit electrodes, an input terminal of the inverter circuit is connected to a direct-current power supply, and two output terminals of the inverter circuit are connected to the two transmit electrodes respectively; the receive apparatus includes two receive electrodes and a rectifier circuit, two input terminals of the rectifier circuit are connected to the two receive electrodes respectively, and an output terminal of the rectifier circuit is connected to a load.

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.

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.

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.

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.

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.

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.