129results about How to "Improve wireless charging efficiency" patented technology

An electronic device and a method for controlling transmission / reception of wireless power by the electronic device are provided. The method includes sensing at least one external electronic device, selecting at least one wireless power transmission / reception conductive pattern element corresponding to the sensed at least one external electronic device, and transmitting / receiving wireless power to / from the sensed at least one external electronic device by using the selected at least one wireless power transmission / reception conductive pattern element.

The invention discloses a wireless charging method and system of an electric vehicle. The charging method comprises the following steps that firstly, preparatory work is conducted, wherein a wireless transmitting device is arranged on the ground of a parking area, electric vehicle guide rails are arranged on the two sides of the parking area and are each provided with a set of pressure sensor arrays, and a wireless receiving device is arranged on the bottom of the electric vehicle in a lifting mode through a lifting device; secondly, charging position alignment of the electric vehicle is conducted through the pressure sensor arrays; thirdly, the electric vehicle executes charging operation, wherein the wireless receiving device drives the lifting device to descend the wireless receiving device towards the wireless transmitting device to enable the wireless receiving device to get close to the wireless transmitting device, and energy transmission maximization is achieved.

Provided are a heat dissipation unit for wireless charging and a wireless power charging module comprising the same. The heat dissipation unit for wireless charging, according to one exemplary embodiment of the present invention, is formed of a plate-shaped substrate layer having a predetermined area to discharge to the outside heat occurring during wireless charging, and comprises at least one slot having a predetermined length. By having at least one slot, the present invention can satisfy all properties required in a wireless charging method, which are charging efficiency and a heat dissipation effect.

The invention provides a frequency tracking device, method and system of a wireless-charging transmitting end, relates to the field of wireless charging and aims at solving the problem of low wireless charging efficiency when existing wireless charging technology is adopted for charging. The frequency tracking device comprises a frequency tracking portion circuit, a high-frequency inverting portion circuit and an LC resonance antenna which are connected sequentially, the frequency tracking portion circuit is used for capturing phase difference of voltage and current and outputting the phase difference to the high-frequency inverting portion circuit, the high-frequency inverting portion circuit is used for enabling output signals to generate frequency deviation according to the phase difference, and the LC resonance antenna is used for outwards transmitting wireless radio frequency signals according to signal frequency after deviation. The frequency tracking system comprises a charging transmitting device, a charging transmitting antenna and the frequency tracking device, and the charging transmitting device and the charging transmitting antenna are connected with each other. The frequency tracking method includes capturing the phase difference of voltage and current; adjusting frequency of the output signals according to the phase difference; outwards transmitting the wireless radio frequency signals according to the signal frequency after adjusting.

The invention discloses a wireless charging strength indicating method which comprises the following steps that: a charged device acquires the wireless charging strength of the current charging position thereof, and displays the wireless charging strength of the current charging position on a display screen, wherein the operation of displaying the wireless charging strengths on the display screen is used for providing a basis for users to select the optimum charging position. According to the wireless charging strength indicating method disclosed by the embodiment of the invention, a user can select the optimum charging position according to the wireless charging strengths displayed on the charged screen of the charged device at different charging positions, thereby improving the efficiency of wireless charging. The embodiment of the invention further provides a corresponding charged device and a mobile terminal.

The present application discloses a coil winding and belongs to the technical field of wireless charging. The coil winding includes an insulating layer; a first partial coil on one side of the insulating layer; and a second partial coil on the other side of the insulating layer. The first partial coil comprises a first wire section. The second partial coil comprises a second wire section. The first wire section and the second wire section each have N slots. The first wire section is divided into N+1 first sub-wires by its N slots. The second wire section is divided into N+1 second sub-wires by its N slots. The N+1 first sub-wires and the N+1 second sub-wires are electrically connected to each other one to one to form N+1 pairs of sub-wires. At least one cross structure is formed in the N+1 pairs of sub-wires. The ring current loss in the coil winding can be reduced and the wireless charging efficiency can be improved. In addition, the present application also discloses a corresponding coil module, a wireless charging transmitting device, a wireless charging receiving device, a wireless charging system, and a terminal.

A vehicle wireless charging guidance system and method is provided. The system includes a power transmission module configured to receive a voltage and switch a transmission coil, a power reception module configured to switch energy transmitted from the power transmission module so as to correspond to a battery arranged in a vehicle, and an around view monitoring unit configured to receive position information from the power transmission module and the power reception module, and display the received position information and image information around the vehicle.

The invention discloses wireless charging electronic equipment, method and system. A charger at a receiving end of the system comprises an open-loop DC-DC converter. When transmitting end power is greater than a first preset threshold of a transmitting end and charging demand power is greater than the first preset threshold of a receiving end, the open-loop DC-DC converter is controlled to work in a fast charging stage, specifically, the open-loop DC-DC converter is controlled to work in a constant-current voltage reduction stage to charge a battery with a constant current, or a switch DC-DCconverter is controlled to work in a constant-voltage voltage reduction stage to charge the battery with a constant voltage. Compared with the prior art, by using the technical scheme of the invention, a power capability of the transmitting end is effectively combined to carry out charging control, wireless charging efficiency of the receiving end is improved, working efficiency of the transmitting end is increased, and the power capability of the transmitting end is fully used so that charging stability is also improved.

The invention discloses a wireless energy supply and communication network. According to the network, an unmanned aerial vehicle is used as a mobile wireless access point to conduct wireless chargingand data collecting, and the flight path of the unmanned aerial vehicle, the real-time working mode of the network and the instant information transmission power of wireless equipment are jointly optimized and determined according to location data of the various wireless equipment; and compared with a traditional wireless energy supply and communication network with a base station at the fixed location, the common information throughput of an uplink is increased while the maximum speed constraint of the unmanned aerial vehicle and the energy collection constraint of the wireless equipment aremet, the double near-far effect problem is solved, and the energy supply and communication efficiency is improved to a certain extent. The invention further provides a method and device for determining the working state of the wireless energy supply and communication network. The method and device have the effects corresponding to the effects of the wireless energy supply and communication network.

The present invention relates to the unmanned aerial vehicle wireless charging technology field, and discloses a method and system for automatic wireless charging of an unmanned aerial vehicle. In the unmanned aerial vehicle automatic wireless charging method, a four-step localization method is employed and comprises: firstly, performing coarse positioning through a satellite, and obtaining a coarse positioning area; secondly, performing fine positioning at the coarse positioning area through adoption of infrared ray intensity, and obtaining a fine positioning area; thirdly, performing finer positioning at the fine positioning area through adoption of laser enclosed to a certain area, and obtaining a finer positioning area; and fourth, detecting point laser at the finer positioning area, obtaining final positioning, and performing automatic wireless charging after the final positioning. The positioning precision is very high, the algorithm is simple, the calculation amount is little, the positioning speed is fast, the wireless charging efficiency and the unmanned aerial vehicle cruising ability are greatly improved, the requirement for the hardware performance is low, and the cost is greatly reduced.

The invention relates to a high-magnetic-conductivity wave-absorbing sheet and tape-casting slurry and a preparation method therefor. The tape-casting slurry for the high-magnetic-conductivity wave-absorbing sheet comprises the following ingredients in parts by weight: 80-85 parts of soft magnetic alloy powder, 8-12 parts of organic insulating elastic body, 3-5 parts of nonvolatile organic solvent, 2-3 parts of plasticizer and 1-3 parts of dispersing agent. The high-magnetic-conductivity wave-absorbing sheet is molded from the tape-casting slurry through a tape-casting process. The tape-casting slurry for the high-magnetic-conductivity wave-absorbing sheet has high wettability for the soft magnetic alloy powder; the prepared wave-absorbing sheet has high magnetic-conductivity, high resistivity and high flexibility; in addition, the preparation method is easy to control; and the prepared wave-absorbing sheet is high in yield and stable in performance.

The invention provides a water-cooled wireless charging system of an electric vehicle. The water-cooled wireless charging system comprises a power cabinet, a capacitor cabinet, charging emitters, a detection and control device, a closed cooling box, a water-cooled cable and red copper pipes. The closed cooling box is used for storing cooling water, one end of the water-cooled cable is connected with the closed cooling box, and the other end of the water-cooled cable is respectively connected to the red copper pipes on the peripheries of the charging emitters. When charging signals of the charging emitters are detected through the detection and control device, the water-cooled cable is controlled to be communicated with the red copper pipes on the peripheries of the charging emitters, and the charging emitters are cooled through the circulating cooling water. According to the water-cooled wireless charging system of the electric vehicle, the charging emitters are cooled through a cooling water circulating system, and the wireless charging efficiency of the electric vehicle is improved.

The invention discloses a wireless charging system for a sweeper. The wireless charging system includes a sweeper and a charging block for wireless charging of the sweeper. The charging block includes a transmitting module. The sweeper includes a receiving module. The transmitting module includes one or more transmitting coils disposed on a transmitting surface of the charging block. The receiving module includes a plurality of receiving coils disposed on the receiving surface of the sweeper. The transmitting surface is matched with the receiving surface. The one or more of the transmitting coils and the plurality of receiving coils are electromagnetically induced by an input power source so that the plurality of receiving coils generate a charging power source to charge the sweeper. Through the transmitting surface of a concave surface structure and the receiving surface of a convex surface structure that match each other, it is possible to make the transmitting coils and the receiving coils which achieve the wireless charging using the electromagnetic induction principle fit closely, thereby improving the efficiency of the wireless charging; and by arranging the plurality of receiving coils and the transmitting coils for charge management, it is possible to improve the charging speed to fast charge the sweeper.

The present invention discloses a smart home wireless power supply system and method. The system comprises: a plurality of wireless power supply devices, each wireless power supply device is at leastconnected with adjacent wireless power supply devices overlapped with a power supply coverage range. Each wireless power supply device comprises: one radio-frequency transmission module configured togenerate and send microwave signals, wherein each radio-frequency transmission module comprises one radio-frequency signal generation device and one radio-frequency antenna module; one communication module configured to receive charging request signals from each wireless charging receiving terminal and position signals of each wireless charging receiving terminal; one control unit configured to determine whether the wireless charging receiving terminals are located in the power supply coverage range overlapped with the adjacent wireless power supply devices or not based on the position signalsand the distribution information of the wireless power supply devices in a wireless power supply node network and determine whether the wireless power supply devices charge the wireless charging receiving terminals or not when the wireless charging receiving terminals are located in the overlapped power supply coverage range. The smart home wireless power supply system and method are wide in coverage range, achieve intelligent charging and positioning track and improve the efficiency of wireless charging.

The invention relates to the field of wireless charging, provides a positioning method and a positioning system for wireless charging and aims to solve the problem of low wireless charging efficiency caused by inaccurate position matching of a charging transmitting antenna and a charging receiving antenna during charging according to existing wireless charging techniques. The system comprises a charging transmitting device, a charging transmitting antenna, a charging receiving antenna, a charging receiving device, at least three auxiliary transmitting positioning antennas and at least three auxiliary sending positioning antennas. By the positioning method and the positioning system for wireless charging, positions of the transmitting antenna and the receiving antenna can be better matched to improve wireless charging efficiency. The positioning method and the positioning system for wireless charging are mainly applied to the field of wireless charging of electric vehicles and convenient for promotion and popularization of the electric vehicles.

The invention relates to a wireless charging device, which comprises a charger and an electricity consumption appliance, wherein a transmitting coil is arranged in the charger; a receiving coil is arranged in the electricity consumption appliance; the transmitting coil and the receiving coil are provided with own magnetic cores; and the two magnetic cores abut against each other to form an internal closed magnetic-flux loop in a charging state. The wireless charging device greatly reduces external electromagnetic radiation, improves charging efficiency, has a simple circuit, is low in cost, and can realize automatic charging and charging protection in combination with a feedback coil and infrared detection control.

The application provides a magnetic coupling type wireless charging system, including a wireless electric energy transmission device which includes a power circuit, an oscillation circuit, a driving circuit and a transmitting coil; a wireless electric energy receiving device which includes a receiving coil, a rectifying circuit and a voltage stabilizing circuit, the wireless electric energy receiving device and the wireless electric energy transmitting device being coupled to each other; and a high-magnetic permeability device arranged between the wireless electric energy transmission device and the wireless electric energy receiving device, the high-magnetic permeability device including a non-metallic material having high magnetic permeability. Therefore, the magnetic coupling type wireless charging system provided by the embodiment of the application can improve the magnetic permeability between coils, thereby improving the transmission efficiency of the system.

The invention discloses a mobile phone back housing capable of realizing wireless charging. The mobile phone back housing is composed of at least two layers of ceramic sheets, a coil is printed on each layer of ceramic sheet, and electric connection between the ceramic sheets is realized through through holes. The thickness of each ceramic sheet is 20 [mu]m-1000 [mu]m, and the total thickness of the mobile phone back housing is 0.2 [mu]m-2 [mu]m. Correspondingly, the invention further provides a method for preparing the mobile phone back housing capable of realizing wireless charging. According to the invention, the wireless charging efficiency of a mobile phone is improved, the wireless charging speed is substantially increased to 2-3 times of the speed of common wireless charging, the thickness of the mobile phone is not increased but decreased, the lightening and thinning requirements of a user to the mobile phone are met, and the market competitiveness is improved.

The invention belongs to the related technical field of wireless charging, and particularly relates to an integrated electromagnetic induction coil for wireless charging and a preparation method thereof. The integrated electromagnetic induction coil is formed by integral preparation of a magnetic conducting material and a coil; the magnetic conducting material is prepared from amorphous and nanocrystalline scales; and the preparation method comprises the following steps: firstly, fixing the coil on a template; stacking the amorphous and nanocrystalline scales; infiltrating the amorphous and nanocrystalline scales with a coating agent diluted by a diluent; and finally preparing the integrated electromagnetic induction coil with a magnet yoke structure through drying treatment. The prepared integrated electromagnetic induction coil has the characteristics of being high in inductance, high in quality factor, simple in integral molding process, low in cost and the like.

The invention provides a NiZn ferrite magnetic sheet, and a preparation method and application thereof. The NiZn ferrite magnetic sheet comprises main components and auxiliary components. The main components are composed of Fe2O3, NiO, ZnO and CuO; and based on the total molar weight (100%) of the main components, the molar percentages of Fe2O3, NiO, ZnO and CuO are 35 to 45 mol%, 10 to 20 mol%, 20 to 30 mol% and 5 to 35 mol%, respectively. The preparation method provided by the invention comprises the following steps: (1) bathcing; (2) pre-burning; (3) pulping; and (4) tape casting and sintering. The NiZn ferrite magnetic sheet provided by the invention has the advantages of high initial magnetic permeability [mu]i, high saturation magnetic induction intensity Bs, high Curie temperature Tc, etc., can be better applied to the field of wireless charging, and allows wireless charging efficiency to be higher.

The invention discloses a ceramic back cover for electronic equipment, and electronic equipment with same. The inner surface of the ceramic back cover is provided with a wireless charging RX coil. Themiddle area of the inner surface of the ceramic back cover is provided with one trough for placing a wireless charging RX coil. Furthermore the inner surface of the ceramic back cover is provided with at least two wireless charging RX electrode troughs which outward extend from the middle area of the trough and the edge area of the trough, wherein the electrodes which are formed in at least two wireless charging RX electrode troughs are used as the leading-out ends of the wireless charging RX coil that is placed in the trough. Two ends of the wireless charging RX coil are soldered on the leading-out ends. The ceramic back cover of the invention is directly used as the back cover of portable electronic products such as smart phone, panel computer and wearable device. The ceramic back coverand the electronic equipment have advantages of satisfying requirements for small size and small thickness of the electronic product, and realizing relatively high wireless charging efficiency.

The invention provides a wireless charging control method and a wireless charging device. The movement of a transmitting coil is controlled according to the change of the currently acquired real-timequality factor value and the inherent quality factor value of the transmitting coil and the change of the previously acquired real-time quality factor value; then, when the currently obtained real-time quality factor value is less than a preset quality factor value, whether the transmission power is higher than the preset efficiency or not is compared; and the movement of the transmitting coil iscontrolled below the preset efficiency, and the transmitting coil is adjusted to the optimal position point. The design of a PCB with a plurality of signal detection coils in the prior art is removedby a detection circuit sharing the wireless charging power, the number of laminated layers of the transmitting coil is reduced, the wireless charging efficiency is improved, and the overall design cost is reduced.

The invention provides a charging control circuit, terminal equipment and a control method. The charging control circuit comprises a first charging sub-circuit and a second charging sub-circuit, wherein the charging efficiency of the first charging sub-circuit is greater than that of the second charging sub-circuit; the charging control circuit further comprises a switching circuit; a first contact of the switching circuit is connected with a charging interface; a second contact of the switching circuit is connected with an output end of a wireless charging module; a third contact of the switching circuit is connected with an input end of the first charging sub-circuit; under a wireless charging condition, the first contact and the third contact are disconnected, and the second contact andthe third contact are conducted. Therefore, the first charging sub-circuit with relatively great charging efficiency can be used for charging under the wireless charging condition and the wireless charging efficiency of the terminal equipment is improved.

The invention relates to a method and device for improving wireless charging efficiency and electronic equipment. The method comprises the following steps: determining a target capacitance value of aresonant capacitor in a receiving module of electronic equipment, wherein the wireless charging efficiency corresponding to the target capacitance value is superior to the current wireless charging efficiency; and controlling the current capacitance value of the resonant capacitor to be adjusted to the target capacitance value. According to the embodiment, the resonant frequency of the receiving module can be closer to the actual working frequency of the transmitting module by adjusting the capacitance value of the resonant capacitor to the target capacitance value, the wireless charging efficiency can be improved, and the charging time of electronic equipment is shortened.

The application discloses a coil module, a wireless charging transmitting device, a wireless charging receiving device, a wireless charging system, and a terminal. The coil module includes a first planar coil winding and a second planar coil winding. The first turn of coil of the first planar coil winding include a first outer portion and a first inner portion, and the end portion of the first turn of coil of the first planar coil winding includes the end portion of the first outer portion and the end portion of the first inner portion. The first turn of coil of the second planar coil windingincludes a second outer portion and a second inner portion, and the end portion of the first turn of coil of the second planar coil winding includes the end portion of the second outer portion and theend portion of the second inner portion. The end portion of the first outer portion and the end portion of the second inner portion are electrically connected. The end portion of the second outer portion and the end portion of the first inner portion are electrically connected. The coil module can reduce the circulating current loss in the first planar coil winding and the second planar coil winding, and is improved in wireless charging efficiency.

The invention discloses an unmanned aerial vehicle wireless charging system and an unmanned aerial vehicle wireless charging method. The system comprises a charging pile, an unmanned aerial vehicle and a ground landing control system; a wireless charging module, an energy storage battery, a Bluetooth module and a GPS module are arranged on the charging pile; a lithium battery, the Bluetooth module, the wireless charging module, a camera, a GPS navigation module and an ultrasonic distance measuring module are arranged on the unmanned aerial vehicle; the ground landing control system comprises an unmanned aerial vehicle ground station and a vision navigation module; the vision navigation module processes the acquired image; the relative position of the unmanned aerial vehicle and the charging pile is calculated through GPS positioning information; the unmanned aerial vehicle ground station transmits a position adjusting and landing control signal to the unmanned aerial vehicle; the ultrasonic distance measuring module detects the relative height of the unmanned aerial vehicle and the charging pile; after landing, the charging pile and the unmanned aerial vehicle performs wireless charging through Bluetooth communication; and the unmanned aerial vehicle wireless charging system enables the inspection unmanned aerial vehicle to automatically navigate to the near charging pile when the electric quantity is insufficient to perform wireless charging, so that the inspection distance and the inspection efficiency of the unmanned aerial vehicle are increased.

The invention is suitable for the technical field of wireless charging, and provides a wireless charging power distribution method, device, equipment and storage medium. The method includes receivinga wireless charging request sent by a charging terminal, performing initialization parameter setting on a coil array of a wireless charging transmitting end according to the wireless charging request,randomly generating K power distribution schemes according to a preset power distribution algorithm, detecting the K power distribution schemes to obtain corresponding receiving power of the K powerdistribution schemes, detecting maximum receiving power among the corresponding receiving power of the K power distribution schemes meets a preset threshold condition, and when the maximum receiving power meets the threshold condition, setting charging power of the charging terminal according to the distribution scheme corresponding to the maximum receiving power, thereby improving efficiency of wireless charging power distribution, and improving wireless charging efficiency of the charging terminal.

The invention relates to a wireless charging receiving apparatus, a wireless charging system and a charging control method thereof. The wireless charging receiving apparatus includes: a frequency modulation control module, a receiving resonance sensing module and a receiving control module. The frequency modulation control module is intended for pooling a plurality of preset states, detecting the peak value of a first output end of the receiving resonance sensing apparatus, and obtaining the best state from the polled preset states; the receiving resonance sensing module is intended for, on the basis of the best state, setting capacitance value in LC resonance so as to regulate the resonance frequency of the LC resonance, outputting the largest charging current by regulating and controlling a second output end, the LC resonance being formed in the receiving resonance sensing module; and the receiving control module is intended for conducting DC conversion on the largest charging current and then outputting the largest charging current that undergoes DC conversion to a to-be-charged load. According to the invention, the wireless charging receiving apparatus enables the resonance frequency of a receiving end to approach the resonance frequency of a transmitting end, thus increasing the efficiency of wireless charging.

The invention discloses a transmitting assembly for wireless charging of an electric automobile. The transmitting assembly comprises a non-metal shell, a transmitting coil, a transmitting magnetic core and a metal shell that are sequentially assembled from top to bottom. The transmitting magnetic core comprises at least two ferrite layers which are stacked in a staggered mode. Each ferrite layer is formed by splicing a plurality of ferrites; the ferrite layer corresponding to the periphery of the transmitting coil is close to the transmitting coil; the rest ferrite layers are sequentially arranged in a retracting manner corresponding to the central position of the transmitting coil and are gradually far away from transmitting coil. The invention further discloses a charging assembly for wireless charging of the electric automobile, wherein the charging assembly comprises the transmitting assembly and the receiving assembly which are arranged in parallel, the problem that a transmittingmagnetic field is uneven in distribution is solved, magnetic saturation is inhibited, and the wireless charging efficiency is improved.