WO2022042498A1 - Transmetteur de charge sans fil, récepteur de charge sans fil et système de charge sans fil - Google Patents

Transmetteur de charge sans fil, récepteur de charge sans fil et système de charge sans fil Download PDF

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Publication number
WO2022042498A1
WO2022042498A1 PCT/CN2021/114137 CN2021114137W WO2022042498A1 WO 2022042498 A1 WO2022042498 A1 WO 2022042498A1 CN 2021114137 W CN2021114137 W CN 2021114137W WO 2022042498 A1 WO2022042498 A1 WO 2022042498A1
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WO
WIPO (PCT)
Prior art keywords
wireless charging
coil
charging
voltage
receiving
Prior art date
Application number
PCT/CN2021/114137
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English (en)
Chinese (zh)
Inventor
裴昌盛
许兴平
洪良
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202110038596.4A external-priority patent/CN114123537B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2022042498A1 publication Critical patent/WO2022042498A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present application relates to the technical field of charging, and in particular, to a wireless charging transmitter, a wireless charging receiver and a wireless charging system.
  • Wireless charging technology can use magnetic field as a conductive medium to realize wireless transmission of electric energy.
  • the wireless charging device can have the advantages of no charging cable restraint, no plug-in interface settings, etc., which can make the user's use environment more concise and comfortable, and is conducive to the realization of a fully enclosed waterproof design of the mobile terminal.
  • currently wireless charging is slower than wired charging.
  • the present application outputs a wireless charging transmitter, a wireless charging receiver and a wireless charging system, which are used to improve the problem of slow wireless charging speed.
  • a wireless charging transmitter is provided.
  • the wireless charging transmitter is used to output alternating magnetic field to the wireless charging receiver.
  • the wireless charging transmitter includes a first voltage conversion circuit, a first inverter circuit, a first transmission coil, a second inverter circuit and a second transmission coil.
  • the first voltage conversion circuit is electrically connected with the adapter, and the first voltage conversion circuit is used for converting the DC power output by the adapter into DC power.
  • the first inverter circuit is electrically connected with the first voltage conversion circuit, and the first inverter circuit is used for converting the direct current output by the first voltage conversion circuit into a first square wave signal.
  • the first transmitting coil is electrically connected to the first inverter circuit, and the first transmitting coil is used for converting the first square wave signal into a first alternating magnetic field.
  • the circuit in the wireless charging receiver for receiving the first alternating magnetic field, the ratio of the first output voltage V o1 output to the battery in the wireless charging receiver and the input voltage V in1 of the first inverter circuit is the first voltage transmission Gain k1.
  • the second inverter circuit is electrically connected to the adapter, and the second inverter circuit is used for converting the DC power output by the adapter into a second square wave signal.
  • the second transmitting coil is electrically connected with the second inverter circuit, and the second transmitting coil is used for converting the second square wave signal into a second alternating magnetic field.
  • the ratio of the second output voltage V o2 output to the battery to the input voltage V in2 of the second inverter circuit is the second voltage transmission gain k2.
  • the first voltage transmission gain k1 is different from the second voltage transmission gain k2, and the first output voltage V o1 and the second output voltage V o2 are the same.
  • the first voltage conversion circuit, the first inverter circuit, and the first transmitting coil can constitute the transmitting end of the first charging branch of the wireless charging system.
  • the second inverter circuit and the second transmitting coil can constitute the transmitting end of the second charging branch of the wireless charging system.
  • the wireless charging transmitter only sets the first voltage conversion circuit in the first charging branch, and the second inverter circuit in the second charging branch can be directly electrically connected to the adapter, which can effectively simplify the wireless charging transmitter Structure.
  • the wireless charging transmitter when the battery is about to be fully charged or the coils in the first charging branch or the second charging branch generate heat, it is necessary to precisely control the output currents of the two charging branches to reduce the first charge. The current output by the branch or the second charging branch to the battery.
  • the first charging branch and the second charging branch supply power to the battery after being connected in parallel, in order to prevent the output terminals of the first charging branch and the second charging branch connected in parallel from generating an inrush current, the first charging branch Or the current output by the second charging branch changes with a charging branch with a higher output voltage, the first output voltage V o1 provided by the first charging branch to the battery and the second output voltage V provided by the second charging branch to the battery o2 needs to be the same.
  • the first voltage transmission gain can be set.
  • the values of k1 and the second voltage transmission gain k2 are different, so that the first output voltage V o1 and the second output voltage V o2 are the same under the respective effects of the above-mentioned transmission gains. Furthermore, the output currents respectively provided by the first charging branch and the second charging branch to the battery can be precisely controlled.
  • the first voltage conversion circuit is a boost circuit, and the first voltage transmission gain k1 is smaller than the second voltage transmission gain k2.
  • the transformer formed by the first transmitting coil and the first receiving coil in the first charging branch can have a step-down effect, and can The voltage output by the first voltage conversion circuit of the boost circuit is stepped down, so that the first output voltage V o1 and the second output voltage V o2 are the same.
  • the number of turns of the first receiving coil for receiving the first alternating magnetic field is smaller than the number of turns of the first transmitting coil.
  • the inductance of the first receiving coil is smaller than the inductance of the first transmitting coil, and the first voltage transmission gain k1 may be smaller than 1.
  • the number of turns of the second receiving coil for receiving the second alternating magnetic field is greater than or equal to the number of turns of the second transmitting coil.
  • the inductance of the second receiving coil may be greater than or equal to the inductance of the second transmitting coil, so that the second voltage transmission gain k2 may be greater than or equal to 1.
  • the first voltage conversion circuit is a step-down circuit, and the first voltage transmission gain k1 is greater than the second voltage transmission gain k2.
  • the transformer formed by the first transmitting coil and the first receiving coil in the first charging branch can have the function of boosting, and can The voltage output by the first voltage conversion circuit of the step-down circuit is boosted, so that the first output voltage V o1 and the second output voltage V o2 are the same.
  • the number of turns of the first receiving coil for receiving the first alternating magnetic field is greater than the number of turns of the first transmitting coil.
  • the inductance of the first receiving coil is greater than the inductance of the first transmitting coil, and the first voltage transmission gain k1 may be greater than 1.
  • the number of turns of the second receiving coil for receiving the second alternating magnetic field is less than or equal to the number of turns of the second transmitting coil.
  • the inductance of the second receiving coil may be less than or equal to the inductance of the second transmitting coil, so that the second voltage transmission gain k2 may be less than or equal to 1.
  • the wireless charging transmitter further includes a first matching capacitor and a second matching capacitor.
  • the first matching capacitor is connected in series with the first transmitting coil, and forms a first series resonance network with the first transmitting coil.
  • the first transmitting coil can convert the first square wave signal into the first alternating magnetic field.
  • the second matching capacitor is connected in series with the second transmitting coil, and forms a second series resonance network with the second transmitting coil.
  • the second transmitting coil can convert the second square wave signal into the second alternating magnetic field.
  • the operating frequency of the first series resonant network is different from that of the second series resonant network.
  • the wireless charging transmitter further includes a first magnetic rod.
  • the first transmitting coil is a circular coil
  • the second transmitting coil is a magnetic bar coil wound on the first magnetic bar.
  • the first transmitting coil is a bar magnet coil wound on the first magnetic bar
  • the second transmitting coil is a circular coil.
  • the size of the bar magnet coil is smaller than that of the circular coil, the bar magnet coil can work at a higher operating frequency, and the bar magnet coil has a higher energy density and provides a larger charging power, which is beneficial to improve the speed of wireless charging.
  • the wireless charging transmitter further includes a first transmission controller, a second transmission controller and a first wireless transceiver.
  • the first transmission controller is electrically connected with the first voltage conversion circuit and the first inverter circuit, and the first transmission controller is used for inputting the first pulse width modulation PWM signal to the first voltage conversion circuit to control the output of the first voltage conversion circuit voltage, and is used to input the second PWM signal to the first inverter circuit to control the frequency of the first square wave signal.
  • the second transmission controller is electrically connected to the second inverter circuit, and the second transmission controller is used for inputting a third PWM signal to the second inverter circuit to control the frequency of the second square wave signal.
  • the wireless charging receiver includes a battery, a first receiving coil, a first receiving controller, a second receiving coil, and a second receiving controller.
  • the first receiving coil is used for receiving the first alternating magnetic field output by the first transmitting coil in the wireless charging transmitter, and converting the first alternating magnetic field into alternating current.
  • the first receiving controller is electrically connected with the first receiving coil and the battery, and is used for converting the alternating current generated by the first receiving coil into direct current and outputting the direct current to the battery.
  • the ratio of the first output voltage V o1 output by the first receiving controller to the battery and the input voltage V in1 of the first inverter circuit electrically connected to the first transmitting coil in the wireless charging transmitter is the first voltage transmission gain k1.
  • the second receiving coil is used for receiving the second alternating magnetic field output by the second transmitting coil in the wireless charging transmitter, and converting the second alternating magnetic field into alternating current.
  • the second receiving controller is electrically connected with the second receiving coil and the battery, and is used for converting the alternating current generated by the second receiving coil into direct current, and outputting it to the battery.
  • the ratio of the second output voltage V o2 output by the second receiving controller to the battery and the input voltage V in2 of the second inverter circuit electrically connected to the second transmitting coil in the wireless charging transmitter is the second voltage transmission gain k2.
  • the first voltage transmission gain k1 is different from the second voltage transmission gain k2, and the first output voltage V o1 and the second output voltage V o2 are the same.
  • the first receiving coil and the first receiving controller can constitute the receiving end of the first charging branch of the wireless charging system.
  • the second receiving coil and the second receiving controller may constitute the receiving end of the second charging branch of the wireless charging system.
  • the first charging branch and the second charging branch supply power to the battery after being connected in parallel, in order to prevent the output terminals of the first charging branch and the second charging branch connected in parallel from generating an inrush current, the first charging branch Or the current output by the second charging branch changes with a charging branch with a higher output voltage, the first output voltage V o1 provided by the first charging branch to the battery and the second output voltage V provided by the second charging branch to the battery o2 needs to be the same.
  • the first voltage transmission gain can be set.
  • the values of k1 and the second voltage transfer gain k2 are different, so that the first output voltage V o1 and the second output voltage V o2 are the same under the respective effects of the above-mentioned transfer gains, so that the first charging branch and the second output voltage V o2 are the same.
  • the output current provided by the charging branch to the battery is precisely controlled.
  • the first voltage transmission gain k1 is smaller than the second voltage transmission gain k2.
  • the number of turns of the first receiving coil is smaller than the number of turns of the first transmitting coil.
  • the number of turns of the second receiving coil is greater than or equal to the number of turns of the second transmitting coil.
  • the first voltage transmission gain k1 is greater than the second voltage transmission gain k2.
  • the number of turns of the first receiving coil is greater than the number of turns of the first transmitting coil.
  • the number of turns of the second receiving coil is less than or equal to the number of turns of the second transmitting coil.
  • the wireless charging receiver further includes a second magnetic rod.
  • the first receiving coil is a circular coil
  • the second receiving coil is a bar magnet coil wound on the second magnet bar.
  • the first receiving coil is a bar magnet coil wound on the second magnet bar
  • the second receiving coil is a circular coil.
  • the technical effect of the magnetic bar coil is the same as above, and will not be repeated here.
  • the wireless charging receiver further includes a first thermistor, a second thermistor and a charging manager.
  • the first thermistor is used for sensing the first temperature T 1 of the first receiving coil.
  • the second thermistor is used to sense the second temperature T 2 of the second receiving coil.
  • the charging manager may be electrically connected with the first thermistor and the second thermistor.
  • the charge manager may be used to generate a power request based on the first temperature T 1 and the second temperature T 2 .
  • the power request is used to adjust the charging power output by the wireless charging transmitter.
  • the charging manager may calculate the first current error and the second current error according to a preset charging strategy.
  • the preset charging strategy includes a first mapping relationship between the first temperature T1 and the first target current I G1 , and a second mapping relationship between the second temperature T 2 and the second target current I G2 .
  • the first receiving controller is configured to calculate the first current error and the second current error according to the preset charging strategy, including: the first receiving controller is specifically configured to obtain the first target current I G1 according to the first temperature T 1 and the first mapping relationship , and calculate the absolute value of the difference between the first output current I 1 and the first target current I G1 to obtain the first current error; the first receiving controller is also specifically used to obtain the second temperature T 2 and the second mapping relationship according to the second The second target current I G2 , and the absolute value of the difference between the second output current I 2 and the second target current I G2 is calculated to obtain the second current error.
  • the wireless charging system can follow the above-mentioned preset charging strategy and the temperature target value of the expected temperature drop. , obtain the target current that matches the target temperature value and generate a power request, and then send the power request to the wireless charging transmitter, so that the wireless charging transmitter can adjust the output voltage of the adapter and the first voltage conversion circuit according to the above-mentioned power request , to achieve the purpose of adjusting the charging power output by the wireless charging transmitter.
  • the switching frequency of the MOS transistors in the first inverter circuit and the second inverter circuit can also be adjusted in combination, so that the first output current I 1 output by the first charging branch is the same as or close to the first target current I G1 , and the first The second output current I 2 output by the two charging branches is the same as or close to the second target current I G2 . Therefore, the size of the first output current I 1 and the second output current I 2 can be allocated in a reasonable proportion, so that the temperature of the charging branch whose output current accounts for a small proportion can be lowered to the target temperature, and finally the temperature of the receiving end coil can be reduced. the goal of.
  • the wireless charging receiver further includes a second voltage conversion circuit, a first isolation switch, and a second isolation switch.
  • the second voltage conversion circuit is electrically connected to the battery, the first receiving controller and the second receiving controller, and is used for converting the voltage output by at least one of the first receiving controller and the second receiving controller into a charging voltage of the battery.
  • the second voltage conversion circuit can reduce the voltage output by the first receiving controller to a charging voltage of the battery.
  • the first isolation switch is electrically connected to the first receiving controller and the second voltage converting circuit. The first receiving controller is used to control the opening and disconnection of the first isolation switch.
  • the second isolation switch is electrically connected to the second receiving controller and the second voltage converting circuit.
  • the second receiving controller is used to control the opening and disconnection of the second isolation switch.
  • the wireless charging system includes an adapter, any one of the above-mentioned wireless charging transmitters, and any one of the above-mentioned wireless charging receivers.
  • the adapter is electrically connected with the first voltage conversion circuit and the second inverter circuit in the wireless charging transmitter.
  • the technical effect of the wireless charging system is the same as the technical effect of the wireless charging transmitter and the wireless charging receiver provided in the foregoing embodiments, and will not be repeated here.
  • FIG. 1 is a schematic structural diagram of a wireless charging system according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a circuit structure of a wireless charging system according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of an arrangement of the first transmitting coil, the second transmitting coil, the first receiving coil and the second receiving coil in FIG. 2;
  • FIG. 4A is a schematic diagram of another arrangement of the first transmitting coil and the second transmitting coil in FIG. 2;
  • 4B is a schematic diagram of another arrangement of the first receiving coil and the second receiving coil in FIG. 2;
  • FIG. 4C is a schematic structural diagram of the first magnet bar and the magnet bar coil wound on the first magnet bar in FIG. 4A;
  • FIG. 4D is a schematic structural diagram of the wireless receiver shown in FIG. 4B disposed on the wireless charging transmitter shown in FIG. 4A;
  • FIG. 5 is a schematic diagram of a circuit structure of another wireless charging system provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a circuit structure of a wireless charging system provided by the related art.
  • FIG. 7A is a schematic diagram of a curve of an operating frequency and a voltage transmission gain of a first charging branch provided by an embodiment of the present application;
  • FIG. 7B is a schematic diagram of another operating frequency and voltage transmission gain of the first charging branch according to an embodiment of the present application.
  • FIG. 8A is a schematic diagram of a curve of an operating frequency and a voltage transmission gain of a second charging branch provided by an embodiment of the present application;
  • FIG. 8B is a schematic diagram of another operating frequency and voltage transmission gain of the second charging branch provided by an embodiment of the present application.
  • FIG. 9 is a flowchart of a charging method of a wireless charging system provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a circuit structure of another wireless charging system provided by an embodiment of the present application.
  • Fig. 11 is a method flow chart of S102 in Fig. 9;
  • Fig. 12 is another method flow chart of S102 in Fig. 9;
  • FIG. 13 is a schematic diagram of a circuit structure of another wireless charging system provided by an embodiment of the present application.
  • FIG. 14 is a flowchart of a method of S104 in FIG. 9 .
  • 01-wireless charging system 10-wireless charging transmitter; 20-wireless charging receiver; 101-adapter; 102-first voltage conversion circuit; 111-first inverter circuit; 112-second inverter circuit; 121- 122-second transmitting coil; 201-first receiving controller; 202-second receiving controller; 221-first receiving coil; 222-second receiving coil; 210-second voltage conversion circuit; 200-battery; 40-circular coil; 41-first magnet bar; 50-magnet bar coil; 42-second magnet bar; 51-groove; 52-warping part; 53-magnetic structure; 31-th 1 charging branch; 32 - second charging branch; 61 - first transmitter controller; 62 - second transmitter controller; 71 - first wireless transceiver; 72 - second wireless transceiver; 73 - charging manager ; 231 - the first isolating switch; 232 - the second isolating switch; 81 - the first thermistor; 82 - the second thermistor.
  • first”, second, etc. are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features.
  • a feature defined as “first”, “second”, etc. may expressly or implicitly include one or more of that feature.
  • directional terms such as “upper” and “lower” may include, but are not limited to, definitions relative to the schematic placement of components in the drawings. It should be understood that these directional terms may be relative concepts, They are used for relative description and clarification, which may vary accordingly depending on the orientation in which the components are placed in the drawings.
  • connection should be understood in a broad sense.
  • connection may be a fixed connection, a detachable connection, or an integrated body; it may be directly connected, or Can be indirectly connected through an intermediary.
  • electrical connection may be a direct electrical connection or an indirect electrical connection through an intermediate medium.
  • the wireless charging system 01 may include a wireless charging transmitter (transmit, TX) device 10 and a wireless charging receiver (receive, RX) device 20 .
  • the wireless charging transmitter 10 is used for outputting an alternating magnetic field to the wireless charging receiver 20 for power transmission.
  • the above-mentioned wireless charging receiver 20 may include a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a smart wearable product (for example, a smart watch, a smart bracelet), Virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment and other equipment with wireless charging function.
  • the above-mentioned wireless charging receiver 20 may also be wirelessly charging electric vehicles, wirelessly charging small household appliances (eg, soymilk maker, sweeping robot), drones and other electronic products.
  • the specific form of the above-mentioned wireless charging receiver 20 is not particularly limited in this embodiment of the present application. For the convenience of description below, the description is given by taking the wireless charging receiver 20 as a mobile phone as shown in FIG. 1 as an example.
  • the above-mentioned wireless charging transmitter 10 may be a charging base as shown in FIG. 1 .
  • the wireless charging transmitter 10 and the wireless charging receiver 20 may implement wireless data communication through in-band communication, for example, amplitude shift keying (ASK) modulation.
  • ASK amplitude shift keying
  • the wireless charging transmitter 10 and the wireless charging receiver 20 can communicate with each other through out-of-band communication, such as Bluetooth (bluetooth), wireless-fidelity (WiFi), Zigbee, radio frequency identification (radio frequency identification) frequency identification, RFID), long range (Lora) wireless technology and short-range wireless communication technology (near field communication, NFC) to achieve wireless data communication.
  • Bluetooth bluetooth
  • WiFi wireless-fidelity
  • Zigbee Zigbee
  • radio frequency identification radio frequency identification
  • RFID long range
  • Lora long range wireless technology
  • short-range wireless communication technology near field communication, NFC
  • the wireless charging transmitter 10 may include an adapter 101 , a first voltage conversion circuit 102 , a first inverter circuit 111 , a first transmission coil 121 , a second inverter circuit 112 and a second transmission Coil 122 .
  • the adapter 101 can convert 220V alternating current into direct current (eg, 5V or 20V, etc.) according to the requirement of charging power.
  • the output voltage of the adapter 101 can be adjusted within a certain voltage range (for example, 5V ⁇ 20V) as required.
  • the first voltage conversion circuit 102 is electrically connected to the adapter 101, and the first voltage conversion circuit 102 is used for converting the DC power output by the adapter 101 into DC power.
  • the first voltage conversion circuit 102 may be a direct current to direct current (DC/DC) voltage converter.
  • the first voltage conversion circuit 102 may be a booster circuit, so as to boost the input DC voltage before outputting it.
  • the first voltage conversion circuit 102 may be a step-down circuit, so as to step down the input DC voltage before outputting it.
  • the first inverter circuit 111 is electrically connected to the first voltage conversion circuit 102 .
  • the first inverter circuit 111 is used to convert the direct current output from the first voltage conversion circuit 102 into a first square wave signal V hb1 .
  • the first inverter circuit 111 may be a full-bridge circuit or a half-bridge circuit.
  • the first inverter circuit 111 includes a plurality of metal oxide semiconductor (MOS) transistors.
  • MOS metal oxide semiconductor
  • the first square wave signal V output by the first inverter circuit 111 can be controlled The frequency and duty cycle of hb1 .
  • the wireless charging transmitter 10 further includes a first matching capacitor C1 connected in series with the first transmitting coil 121 .
  • the first matching capacitor C1 and the first transmitting coil 121 may form a first series resonance network.
  • the first transmitting coil 121 is electrically connected to the first inverter circuit 111 through the first matching capacitor C1.
  • the first transmitting coil 121 can convert the first square wave signal V hb1 into a first alternating magnetic field.
  • the operating frequency of the first series resonant network is the same as the switching frequency F of the MOS transistor in the first inverter circuit 111 .
  • the second inverter circuit 112 in the wireless charging transmitter 10 is electrically connected to the above-mentioned adapter 101 , and the second inverter circuit 112 is used to convert the DC power output by the adapter 101 into a second square wave signal V hb2 .
  • the working principle of the second inverter circuit 112 is the same as that of the first inverter circuit 111 , and details are not repeated here.
  • the wireless charging transmitter 10 may further include a second matching capacitor C2 connected in series with the second transmitting coil 122 .
  • the second matching capacitor C2 and the second transmitting coil 122 may form a second series resonance network.
  • the second transmitting coil 122 is electrically connected to the second inverter circuit 112 through the above-mentioned second matching capacitor C2.
  • the second transmitting coil 122 is used for converting the second square wave signal V hb2 into a second alternating magnetic field.
  • the operating frequency of the second series resonant network is the same as the switching frequency F of the MOS transistor in the second inverter circuit 112 .
  • the wireless charging receiver 20 may include a battery 200 , a first receiving coil 221 , a second receiving coil 222 , a first receiving controller 201 , and a second receiving controller 202 .
  • the first receiving coil 221 is used for receiving the first alternating magnetic field output by the first transmitting coil 121, and converting the first alternating magnetic field into alternating current.
  • the first receiving coil 221 can be connected in series with the matching capacitor C3 to form a series resonance network.
  • the first receiving controller 201 is electrically connected to the first receiving coil 221 and the battery 200 .
  • the first receiving controller 201 is used to convert the alternating current generated by the first receiving coil 221 into direct current, and output it to the battery 200 to charge the battery 200 .
  • the above-mentioned first receiving controller 201 may include a rectifier.
  • the wireless charging receiver 20 may include a second voltage converting circuit 210 .
  • the second voltage converting circuit 210 is electrically connected to the battery 200 and the first receiving controller 201 , so that the first receiving controller 201 can be indirectly electrically connected to the battery 200 through the second voltage converting circuit 210 .
  • the above-mentioned second voltage conversion circuit 210 is used to reduce the output voltage (eg, about 10V) of the first receiving controller 201 to a charging voltage V bat (eg, about 4V) of the battery 200 .
  • the second voltage conversion circuit 210 may be a DC/DC voltage converter, such as a buck (buck) circuit, or a switched capacitor (switched capacitor, SC) circuit.
  • buck buck
  • SC switched capacitor
  • the input-output voltage ratio of the buck circuit can be flexibly adjusted.
  • the input-output voltage ratio of the SC circuit is an integer, but the SC circuit can withstand a higher input-output voltage difference and has a higher voltage conversion efficiency.
  • the present application does not limit the type of the second voltage conversion circuit 210 .
  • the second receiving controller 202 is electrically connected to the second receiving coil 222 , and the second voltage converting circuit 210 is also electrically connected to the second receiving controller 202 and the battery 200 . Therefore, the second receiving controller 202 may be indirectly electrically connected to the battery 200 through the second voltage converting circuit 210 .
  • the second receiving controller 202 is configured to convert the alternating current generated by the second receiving coil 222 into direct current, and output the alternating current to the battery 200 to charge the battery 200 .
  • the second receiving coil 222 can be connected in series with the matching capacitor C4 to form a series resonance network.
  • the second receive controller 202 may include a rectifier.
  • the above-mentioned first transmitting coil 121 is of the same type as the first receiving coil 221 corresponding to its position
  • the second transmitting coil 122 is the same type as the second receiving coil 222 corresponding to its position
  • the first transmitting coil 121 and the first receiving coil 221 may both be circular coils 40 as shown in FIG. 3
  • the second transmitting coil 122 and the second receiving coil 222 may both be circular coils as shown in FIG. 3 .
  • shaped coil 40 may be
  • the operating frequency of the series resonant network can be below 210KHz.
  • the above-mentioned circular coil 40 may adopt the wireless charging standard (Qi) protocol.
  • the first transmitting coil 121 shown in FIG. 2 may be a circular coil 40 disposed in the wireless charging transmitter 10 as shown in FIG. 4A .
  • the first receiving coil 221 corresponding to the position of the first transmitting coil 121 may be, as shown in FIG. 4B , a circular coil 40 disposed in the wireless charging receiver 20 .
  • the wireless charging transmitter 10 may further include a first magnetic bar 41 .
  • the second transmitting coil 122 shown in FIG. 2 may be a bar magnet coil 50 wound on the first bar magnet 41 as shown in FIG. 4A .
  • the first magnet bar 41 is provided with a groove 51 , and the magnet bar coil 50 can be wound at the position where the groove 51 is located.
  • the size of the first magnet bar 41 is small, so the magnet bar coil 50 wound on the first magnet bar 41 has a shorter coil length, lower resistance and concentrated magnetic flux density than the circular coil 40 . Therefore, the magnetic bar coil 50 has a higher energy density and provides a larger charging power, which is beneficial to improve the speed of wireless charging.
  • the wireless charging receiver 20 may further include a second magnetic rod 42 , and the second receiving coil 222 corresponding to the position of the second transmitting coil 122 may be a magnetic rod wound on the second magnetic rod 42 .
  • Rod coil 50 a magnetic rod wound on the second magnetic rod 42 .
  • the present application uses the smaller-sized magnet bar coils 50 for some of the coils, which is beneficial to reduce the size of the product.
  • the operating frequency of the second series resonant network having the second transmitting coil 122 is different from that of the first series resonating network having the first transmitting coil 121 , and the second series resonant network adopts a smaller size magnet bar coil , so it can have a higher working frequency, for example, the working frequency of the second series resonant network can be in the range of 330Khz ⁇ 350Khz.
  • the first transmitting coil 121 can be as shown in FIG. 4A , which is the magnetic bar coil 50 wound on the first magnetic bar 41 , and the second transmitting coil 122 can be arranged in a circle in the wireless charging transmitter 10 . shaped coil 40.
  • the first receiving coil 221 corresponding to the position of the first transmitting coil 121 may be, as shown in FIG. 4B , the magnetic bar coil 50 wound on the second magnetic bar 42 , corresponding to the position of the second transmitting coil 122 .
  • the second receiving coil 222 can be a circular coil 40 provided in the wireless charging receiver 20 .
  • the operating frequency of the first series resonant network with the first transmitting coil 121 is different from that of the second series resonant network having the second transmitting coil 122, and the first series resonant network adopts a smaller size magnet bar coil , so it can have a higher working frequency, for example, the working frequency of the first series resonant network can be about 330KHz to 350KHz.
  • the size of the circular coil 40 is larger than that of the magnetic rod coil 50. Therefore, as shown in FIG. 4D, when the wireless charging receiver 20 is a mobile phone, the back of the mobile phone has a large space for cloth, so the wireless charging The circular coil 40 in the charging receiver 20 is arranged on the back of the mobile phone (a side surface opposite to the display surface), and is in contact with the casing of the mobile phone. In addition, the lower part of the mobile phone has a small space for cloth parts, so the magnetic rod coil 50 in the wireless charging receiver 20 can be arranged under the mobile phone.
  • the circular coil 40 on the wireless charging transmitter 10 is connected to the wireless charging receiver 20 .
  • the positions of the circular coils 40 in the circuit correspond to each other, so that between the wireless charging transmitter 10 and the wireless charging receiver 20, power can be transmitted through the circular coils 40 and the circular coils 40 to form a pair of charging branches.
  • the wireless charging receiver 20 performs charging.
  • the positions of the magnetic rod coil 50 on the wireless charging transmitter 10 and the magnetic rod coil 50 in the wireless charging receiver 20 correspond to each other, so that the wireless charging transmitter 10 and the wireless charging receiver 20 can pass through the magnetic rod.
  • the coil 50 and the magnetic bar coil 50 perform power transmission to form another charging branch to charge the wireless charging receiver 20 .
  • the wireless charging transmitter 10 and the wireless charging Magnetic attraction structures 53 as shown in FIG. 4B may be respectively provided in the receivers 20 .
  • the magnetic attraction structure 53 may be a magnetic bar structure made of magnetic materials.
  • some structures for assisting positioning may also be provided in the wireless charging transmitter 10 .
  • the portion of the wireless charging transmitter 10 for carrying the wireless charging receiver 20 may be warped upward to form a warped portion 52 as shown in FIG. 4B .
  • the warped portion 52 can limit the position of the wireless charging receiver 20 to prevent the wireless charging receiver 20 from sliding down, which would cause the magnetic rod coil 50 on the wireless charging transmitter 10 and the magnetic rod coil 50 in the wireless charging receiver 20 to fail. Accurate alignment.
  • the wireless charging system 01 composed of the above-mentioned wireless charging transmitter 10 and wireless charging receiver 20, as shown in FIG. 5, the first voltage conversion circuit 102, the first inverter circuit 111, the first transmitting coil 121, The first receiving coil 221 and the first receiving controller 201 may constitute the first charging branch 31 of the wireless charging system 01 .
  • the second inverter circuit 112 , the second transmitting coil 122 , the second receiving coil 222 and the second receiving controller 202 may constitute the second charging branch 32 of the wireless charging system 01 .
  • the wireless charging system 01 provided in this embodiment of the present application may have the above two charging branches (the first charging branch 31 and the second charging branch 32 ).
  • the solution of the present application provides more power to the battery 200 in the same time, so that the charging efficiency of the battery 200 can be effectively improved, and the charging efficiency of the wireless charging can be improved. Speeds are comparable to those of wired charging.
  • the first receiving controller 201 in the first charging branch 31 and the second receiving controller 201 in the second charging branch 32 can be connected in parallel to supply power to the battery 200 . Since the two voltage sources cannot be directly connected in parallel, at least one of the first receiving controller 201 and the second receiving controller 202 can be equivalent to a current source. In this case, the battery 200 is charged with a total current formed by combining the currents output by the first receiving controller 201 and the second receiving controller 202 in parallel.
  • the magnitude of the current output by each charging branch needs to be flexibly and accurately adjusted according to the needs of the user. For example, when the battery 200 is about to be fully charged, it is necessary to precisely control the output currents of the above two charging branches, so as to reduce the current output by the first charging branch 31 and the second charging branch 32 to the battery 200, so that the battery When the 200 is about to be fully charged, the charging power supplied to the battery 200 can be reduced.
  • the first receiving controller 201 and the second receiving controller 202 supply power to the battery 200 in parallel, in order to avoid the parallel connection of the output terminals of the first charging branch 31 and the second charging branch 32
  • the inrush current causes the current output by the first charging branch 31 and the second charging branch 32 to change with the charging branch with a higher output voltage.
  • precise control of the magnitudes of the first output current I 1 and the second output current I 2 is achieved, and the first output voltage V o1 output by the first receiving controller 201 and the second output voltage V o1 output by the second receiving controller 202 are The voltage V o2 is the same.
  • the first output voltage V o1 output by the first receiving controller 201 is the same as the second output voltage V o2 output by the second receiving controller 202 , which means that the first charging branch 31 and the first charging branch 31 connected in parallel
  • the first output voltage V o1 and the second output voltage V o2 are the same or approximately the same.
  • the The voltage output by the first transmitting coil 121 at the transmitting end, or the voltage output by the second transmitting coil 122 at the transmitting end serving as the second charging branch 32 is adjusted to satisfy the output of the first charging branch 31 the first output current I 1 or the first The second output current I 2 output by the two charging branches 32 is required.
  • the wireless charging transmitter 10 may only set the first voltage conversion circuit 102 in the first charging branch 31 , and the second inverse circuit 102 in the second charging branch 32
  • the transformer circuit 112 can be directly electrically connected to the adapter 101 .
  • the DC/DC voltage converter is provided before the inverter circuit in both the first charging branch 31 and the second charging branch 32 .
  • the present application can effectively simplify the structure of the wireless charging transmitter 10 .
  • the input voltage V in1 of the first inverter circuit 111 is the same as the second inverse voltage V in1
  • the first voltage transmission of the first charging branch 31 is required
  • the gain k1 may be different from the second voltage transfer gain k2 of the second charging branch 32 .
  • ⁇ 0.3 0 ⁇
  • >0.3 the difference between the first voltage transfer gain k1 and the second voltage transfer gain k2 is large, and the voltage at the input end and the voltage at the output end of the first voltage conversion circuit 102 are both greatly different. , causing the conversion efficiency of the first voltage conversion circuit 102 to decrease.
  • may be 0.1, 0.2 or 0.3.
  • the following describes the setting process of the first voltage transmission gain k1 of the first charging branch 31 and the second voltage transmission gain k2 of the second charging branch 32 with reference to the circuit structure shown in FIG.
  • the control processes of the charging transmitter 10 and the wireless charging receiver 20 are illustrated in detail.
  • the first transmitting coil 121 and the first receiving coil 221 in the first charging branch 31 are the above-mentioned circular coils 40 (as shown in FIG. 4D ), and the second transmitting coil 122 in the second charging branch 32 And the second receiving coil 222 is the above-mentioned bar magnet coil 50 (shown in FIG. 4D ).
  • the operating frequency of the second transmitting coil 122 and the second receiving coil 222 in the second charging branch 32 (for example, in the range of 330KHz ⁇ 350KHz) is higher than that of the first transmitting coil in the first charging branch 31 .
  • 121 and the operating frequency of the first receiving coil 221 (for example, below 210KHz).
  • the first voltage conversion circuit 102 in FIG. 5 may be a boost circuit, and the first voltage transmission gain k1 of the first charging branch 31 is smaller than the second voltage transmission gain of the second charging branch 32 Gain k2, ie k1 ⁇ k2.
  • the number of turns Nb1 of the first receiving coil 221 may be smaller than the number of turns Na1 of the first transmitting coil 121 , that is, Nb1 ⁇ Na1 .
  • the ratio of the output voltage to the input voltage of the transformer formed by the first transmitting coil 121 as the circular coil and the first receiving coil 221 is less than 1, so that k1 ⁇ 1.
  • the number of turns Nb2 of the second receiving coil 222 is greater than or equal to the number of turns Na2 of the second transmitting coil 122, that is, Nb2 ⁇ Na2.
  • the second transmitting coil 122 and the second receiving coil 222 as the magnet coil are formed, and the ratio of the output voltage of the transformer to the input voltage is greater than or equal to 1, so that k2 ⁇ 1.
  • the first voltage transmission gain k1 of the first charging branch 31 can satisfy k1 ⁇ 1, and in order to make the first output current I1 output by the first charging branch 31 meet the requirement, the The adjustment method of the output voltage of the first transmitting coil 121 at the transmitting end will be described.
  • the sizes of the first transmitting coil 121 and the first receiving coil 221 as the circular coil 40 are relatively large, therefore, the allowable positions of the first transmitting coil 121 and the first receiving coil 221
  • the degree of offset is relatively large (for example, the allowable center offset of the transmitting coil and the receiving coil can be about ⁇ 10mm). Therefore, the variation range of the coupling coefficient between the first transmitting coil 121 and the first receiving coil 221 is relatively large, for example, the coupling coefficient may be set between 0.5 and 0.75.
  • the coupling coefficient between the transmitting coil and the receiving coil refers to the tightness of the coupling between the transmitting coil and the receiving coil.
  • the coupling coefficient is related to the position offset degree of the two coils. When the offset degree of the transmitting coil and the receiving coil is small, the coupling coefficient is higher, and vice versa. When the coupling coefficient of the transmitting coil and the receiving coil is higher, the efficiency of transmitting power of the transmitting coil and the receiving coil is higher.
  • the load impedance of the wireless receiver 20 is different.
  • the coupling coefficient between the first transmitting coil 121 and the first receiving coil 221 is 0.75, and the load impedance of the wireless charging receiver 20 is different, the operating frequency of the first series resonant network where the first transmitting coil 121 is located is the same as
  • the relationship curve of the first voltage transfer gain k1 of the first charging branch 31 is shown in FIG. 7A . 7A, the load impedance corresponding to curve 1 is 2.5 ⁇ , the load impedance corresponding to curve 2 is 5 ⁇ , and the load impedance corresponding to curve 3 is 10 ⁇ . It can be seen that when the operating frequency of curve 1, curve 2 and curve 3 is around 1.5 ⁇ 10 5 KHz, the first voltage transmission gain k1 of the first charging branch 31 is the same, and at this time k1 is around 0.8.
  • the coupling coefficient between the first transmitting coil 121 and the first receiving coil 221 is 0.5, and the load impedance of the wireless charging receiver 20 is different, the operation of the first series resonant network where the first transmitting coil 121 is located will not work.
  • the relationship between the frequency and the first voltage transfer gain k1 of the first charging branch 31 is shown in FIG. 7B . 7B, the load impedance corresponding to curve 1 is 2.5 ⁇ , the load impedance corresponding to curve 2 is 5 ⁇ , and the load impedance corresponding to curve 3 is 10 ⁇ . It can be seen that when the operating frequency of curve 1, curve 2 and curve 3 is around 1.0 ⁇ 10 5 KHz, the first voltage transmission gain k1 of the first charging branch 31 is the same, and at this time k1 is around 0.9.
  • the first voltage transmission gain k1 of the first charging branch 31 can be selected as 0.8 or 0.9, so that the A voltage transfer gain k1 can satisfy k ⁇ 1.
  • the number of turns of the first receiving coil 221 can be made smaller than the number of turns of the first transmitting coil 121, and the inductance of the first receiving coil 221 is smaller than the inductance of the first transmitting coil 121, so that the first voltage transmission gain k1 is smaller than 1.
  • the frequency offset is 50KHz (from 1.5 ⁇ 10 5 KHz to 1.0 ⁇ 10 5 KHz), and the frequency offset is large. Therefore, in this example, the first series resonant network where the first transmitting coil 121 is located is not suitable for a fixed operating frequency.
  • the wireless charging receiving The SCP (Secure copy, based on SSH) communication protocol can be used between the transmitter 20 and the wireless charging transmitter 10 to adjust the voltage output by the adapter 101 .
  • the operating frequency of the first series resonance network where the first transmitting coil 121 is located ie the switching frequency F of the MOS transistor in the first inverter circuit 111
  • the output voltage of the first voltage conversion circuit 102 can also be adjusted.
  • the second voltage transmission gain k2 of the second charging branch 32 can satisfy k2 ⁇ 1, and in order to make the second output current I2 output by the second charging branch 32 meet the requirements, the The adjustment method of the output voltage of the second transmitting coil 122 at the transmitting end will be described.
  • the sizes of the second transmitting coil 122 and the second receiving coil 222 as the magnet bar coil 50 are relatively small, and when the magnetic attraction structure 53 (as shown in FIG. 4D ) is used to assist positioning , the offset degree of the second transmitting coil 122 and the second receiving coil 222 is small. Therefore, the variation range of the coupling coefficient between the second transmitting coil 122 and the second receiving coil 222 is narrow, for example, the coupling coefficient may be set between 0.55 and 0.6.
  • the second series resonant network where the second transmitting coil 122 is located will The relationship between the operating frequency and the second voltage transfer gain k2 of the second charging branch 32 is shown in FIG. 8A .
  • the load impedance corresponding to curve 1 is 2.5 ⁇
  • the load impedance corresponding to curve 2 is 5 ⁇
  • the load impedance corresponding to curve 3 is 10 ⁇ . It can be seen that when the operating frequency of curve 1, curve 2 and curve 3 is around 3.4 ⁇ 10 5 KHz, the second voltage transmission gain k2 of the second charging branch 32 is the same, and k2 is located around 1 at this time.
  • the second voltage transmission gain k2 of the second charging branch 32 can be selected to be around 1.
  • the number of turns of the second receiving coil 222 may be slightly larger than the number of turns of the second transmitting coil 122, and the inductance of the second receiving coil 222 is slightly larger than the inductance of the second transmitting coil 122, so that the second voltage transmission gain k2 is slightly larger than 1.
  • the second series resonant network where the second transmitting coil 122 is located is suitable to use a fixed operating frequency.
  • the gain curve of the second charging branch 32 is relatively steep, and when the operating frequency changes , the voltage transfer gain will change greatly.
  • the second series resonant network adopts a fixed operating frequency, that is, the switching frequency F of the MOS transistor in the second inverter circuit 112 adopts a fixed frequency.
  • the wireless charging receiving The voltage output by the adapter 101 can be adjusted between the transmitter 20 and the wireless charging transmitter 10 through the SCP communication protocol.
  • the first voltage transfer gain k1 of the first charging branch 31 satisfies k1 ⁇ 1, for example, k1 is 0.8 or 0.9
  • the second voltage transfer gain k2 of the second charging branch 32 satisfies k2 ⁇ 1, for example, k2 is 1.05.
  • the wireless charging system 01 includes the first charging branch 31 and the second charging branch 32 as shown in FIG. 5 .
  • the above wireless charging The workflow of the system 01 may be as shown in FIG. 9 , including S101 to S107 .
  • the wireless charging receiver 20 as a mobile phone is placed on the wireless charging transmitter 10 as a charging base, and the wireless charging system 01 constituted by the wireless charging transmitter 10 and the wireless charging receiver 20 executes the above S101, so that the wireless charging transmitter 10 and A communication connection is established between the wireless charging receivers 20 through the above-mentioned in-band or out-of-band communication method.
  • the wireless charging transmitter 10 when a communication connection is established between the wireless charging transmitter 10 and the wireless charging receiver 20 in an out-of-band communication manner, as shown in FIG. 10 , the wireless charging transmitter 10 includes a first wireless transceiver 71, and the wireless charging receiver The transceiver 20 includes a second wireless transceiver 72 .
  • the wireless communication between the first wireless transceiver 71 and the second wireless transceiver 72 may be performed in an out-of-band communication manner.
  • the above-mentioned first wireless transceiver 71 and second wireless transceiver 72 may be a Bluetooth controller.
  • the wireless charging receiver 20 serving as a mobile phone when placed on the wireless charging transmitter 10 serving as a charging base, and the first transmitting coil 121 and the wireless charging receiver 20 in the wireless charging transmitter 10 The positions of the first receiving coils 221 are aligned, the first transmitting coils 121 are in the in-position state, and the first charging branch 31 where the first transmitting coils 121 and the first receiving coils 221 are located can work.
  • the positions of the second transmitting coil 122 in the wireless charging transmitter 10 and the second receiving coil 222 in the wireless charging receiver 20 are aligned, the second transmitting coil 122 is in the in-position state, the second transmitting coil 122 and the second The second charging branch 32 where the receiving coil 222 is located can work.
  • the wireless charging system 01 executes S102 and S103 in FIG. 9 .
  • the wireless charging system 01 executes the method of S102, which may specifically include S201 to S204 as shown in FIG. 11 .
  • the wireless charging transmitter 10 may perform the above-mentioned S201. Specifically, the first transmission controller 61 in the wireless charging transmitter 10 shown in FIG. 10 may send the above-mentioned first in-position instruction to the first wireless transceiver 71 .
  • the first in-position instruction is used to indicate that the center offset between the first receiving coil 221 in the wireless charging receiver 20 and the above-mentioned first transmitting coil 121 satisfies the offset allowed for normal charging, for example, about ⁇ 10mm.
  • the wireless charging transmitter 10 serving as the charging base supports the use of the first charging branch 31 to charge the battery 200 .
  • the second transmission controller 62 in the wireless charging transmitter 10 shown in FIG. 10 may send the above-mentioned second in-position instruction to the first wireless transceiver 71 .
  • the second in-position instruction is used to indicate that the offset between the second receiving coil 222 in the wireless charging receiver 20 and the above-mentioned second transmitting coil 122 satisfies the offset allowed by normal charging. It can be seen from the above that the second transmitting coil 122 and the second receiving coil 222 are the magnetic bar coils 50 (as shown in FIG. 4D ), which are small in size and play a role in the auxiliary positioning of the magnetic attraction structure 53 (as shown in FIG. 4D ).
  • the wireless charging transmitter 10 serving as the charging base supports the use of the second charging branch 32 to charge the battery 200 .
  • the first wireless transceiver 71 in the wireless charging transmitter 10 receives the first in-position command and the second in-position command, and sends them to the wireless charging receiver 20 .
  • the wireless charging receiver 20 may include a charging manager (charger) 73 as shown in FIG. 10 .
  • the charge manager 73 may be electrically connected to the battery 200 and the second wireless transceiver 72 .
  • the wireless charging receiver 20 includes a system on chip (SoC)
  • SoC system on chip
  • the above-mentioned charging manager 73 may be integrated in the SoC, or be provided independently of the SoC and electrically connected with the SoC.
  • the charging manager 73 can generate a first power request during the process of the wireless charging receiver 20 performing the above S202, and send the wireless charging transmitter 10 to the wireless charging transmitter 10 through the second wireless transceiver 72.
  • the first power request is sent.
  • the first power request is used to indicate that the charging power provided by the wireless charging transmitter 10 to the battery 200 is the maximum charging power P max of the battery 200 .
  • the conditions for fast charging the battery 200 with high power may include: the power of the battery 200 is lower than a preset power, and the preset power is close to and less than the full power.
  • the temperature of the battery 200 is in a normal temperature state.
  • a fuel gauge and a thermistor can be set inside the charging manager 73 to collect the power and temperature of the battery 200 respectively.
  • the conditions for the high-power fast charging of the battery 200 may be that the temperature of the first receiving coil 221 and the temperature of the second receiving coil 222 are in a normal temperature state.
  • the first transmission controller 61 shown in FIG. 10 can receive the above-mentioned first power request through the first wireless transmitter 71, and according to the first power request A first pulse width modulation (PWM) signal is input to the first voltage conversion circuit 102 .
  • PWM pulse width modulation
  • the magnitude of the output voltage of the first voltage conversion circuit 102 can be controlled.
  • the duty cycle of the first PWM signal may be inversely proportional to the output voltage of the first voltage conversion circuit 102 . Therefore, the duty cycle of the first PWM signal can be reduced to increase the output voltage of the first voltage conversion circuit 102 to realize high-power charging.
  • the duty cycle of the first PWM signal may be proportional to the output voltage of the first voltage conversion circuit 102 .
  • the first transmitting coil 121 and the first receiving coil 221 are circular coils, and the first voltage transmission gain k1 of the first charging branch 31 can be selected as 0.8 or 0.9, the first charging branch
  • the frequency offset of 31 is 50KHz, and the frequency offset is larger. Therefore, the first transmitting coil 121 does not need to work at a fixed frequency. Therefore, the operating frequency of the first transmitting coil 121 can be adjusted to achieve the purpose of increasing the output power.
  • the first transmit controller 61 may also input a second PWM signal to the first inverter circuit 111 according to the first power request, and control the frequency of the second PWM signal to control the output of the first inverter circuit 111.
  • the frequency of the square wave signal V hb1 enables the first inverter circuit 111 to output the first charging power P1 .
  • the frequency of the second PWM signal is inversely proportional to the output current of the first inverter circuit 111 . Therefore, the frequency of the second PWM signal can be reduced, and the output current of the first inverter circuit 111 can be increased, so as to realize high-power charging.
  • the second transmitting coil 122 and the second receiving coil 222 are magnetic rod coils, and the second voltage transmission gain k2 of the second charging branch 32 can be selected as 1.05, the second charging branch The frequency offset of 32 is 20KHz, and the frequency offset is small. Therefore, the first transmitting coil 121 is suitable for working at a fixed frequency. Therefore, the second transmission controller 62 can input the third PWM signal with a fixed frequency to the second inverter circuit 112, so that the first inverter circuit 111 can output the second charging power P2.
  • the wireless charging receiver 20 and the adapter 101 may send the first power request generated by the charging manager 73 to the adapter 101 through the SCP communication protocol, so that the The adapter 101 can increase the output voltage according to the first power request, so that the voltages received by the first voltage conversion circuit 102 and the second inverter circuit 112 are both increased, so that the wireless charging transmitter 10 can output the above-mentioned first voltage.
  • a charging power P1 and a second charging power P2 are used to charge the battery with high power.
  • the first transmitting coil 121 may transmit the first charging power P1 to the first receiving coil 211 by transmitting the first alternating magnetic field.
  • the second transmitting coil 122 may transmit the second charging power P2 to the second receiving coil 222 by transmitting the second alternating magnetic field.
  • the total current I 3 provided by the first charging branch 31 and the second charging branch 32 to the battery 200 is the sum of the first output current I 1 and the second output current I.
  • P1 0.3 ⁇ P max
  • the wireless charging system 01 executes the method of S102, which may specifically include S301 to S304 as shown in FIG. 12 .
  • S301 sending the first in-position command of the first transmitting coil 121 and the second in-position command of the second transmitting coil 122 .
  • S301 is the same as the above-mentioned S201, and will not be described in detail here.
  • the wireless charging receiver 20 performs the process of S202 above.
  • the charging manager 73 may generate a second power request and transmit the second power request to the wireless charging transmitter 10 via the second wireless transceiver 72 .
  • the second power request is used to instruct the wireless charging transmitter 10 to charge the battery 200 with low power. Therefore, the charging power provided by the wireless charging transmitter 10 to the battery 200 is less than the above-mentioned maximum charging power P max .
  • the first thermistor 81 in the vicinity and the second thermistor 82 disposed in the vicinity of the second receiving coil 222 .
  • the first thermistor 81 and the second thermistor 82 can both be electrically connected to the MCU in the first receiving controller 201 .
  • both the first thermistor 81 and the second thermistor 82 may be electrically connected to the above-mentioned charging manager 73 .
  • the description is given by taking an example that both the first thermistor 81 and the second thermistor 82 are electrically connected to the MCU in the first receiving controller 201 .
  • the first thermistor 81 senses the first temperature T 1 of the first receiving coil 221 and sends the first temperature T 1 to the first receiving control device 201.
  • the second thermistor 82 senses the second temperature T 2 of the second receiving coil 222 and transmits the second temperature T 2 to the first receiving controller 201 .
  • the first receiving controller 201 can also be electrically connected to the charging manager 73, and the first receiving controller 201 can compare the temperature sensed by the first thermistor 81 and the second thermistor 82, and when the temperature exceeds the preset value When the temperature is high, a control command is sent to the charging manager 73, so that the charging manager 73 can generate the above-mentioned second power request.
  • the MCU integrated in the first receiving controller 201 The first current error ⁇ I 1 and the second current error ⁇ I 2 can be calculated.
  • the first receiving controller 201 may calculate the first current error ⁇ I 1 and the second current error ⁇ I 2 according to a preset charging strategy.
  • the above-mentioned preset charging strategy may include a first mapping relationship between the first temperature T1 and the first target current I G1 , and a second mapping relationship between the second temperature T 2 and the second target current I G2 .
  • the first mapping relationship includes multiple first temperatures T 1 and multiple first target currents I G1 , and the value of each first temperature T 1 matches the value of one first target current I G1 .
  • the second mapping relationship includes multiple second temperatures T 2 and multiple second target currents I G2 , and the value of each second temperature T 2 matches the value of one second target current I G2 .
  • the first receiving controller 201 can obtain the first target current I G1 matching the value of the first temperature T 1 according to the first temperature T 1 and the first mapping relationship, and calculate the first output
  • , the first current error ⁇ I 1 ( ⁇ I 1
  • ) is obtained.
  • the first receiving controller 201 obtains a second target current I G2 matching the value of the second temperature T 2 according to the second temperature T 2 and the second mapping relationship, and calculates the second output current I 2 and the The absolute value of the difference between the second target currents I G2
  • , the second current error ⁇ I 2 ( ⁇ I 2
  • the above description is based on an example of calculating the first current error ⁇ I 1 and the second current error ⁇ I 2 by the first receiving controller 201 when an MCU is integrated in the first receiving controller 201 .
  • the second wireless transceiver 72 can calculate the above-mentioned first current error ⁇ I 1 and second current error ⁇ I 2 .
  • the temperature collected by the first thermistor 81 and the second thermistor 82 can also be sent to the first transmitter controller 61 or the second transmitter in the wireless charging transmitter 10 through the second wireless transmitter 72 .
  • the controller 62 calculates the above-mentioned first current error ⁇ I 1 and second current error ⁇ I 2 through the first transmission controller 61 or the second transmission controller 62 .
  • the charging manager 73 may calculate the above-mentioned The first current error ⁇ I 1 and the second current error ⁇ I 2 .
  • the charge manager 73 may generate a power request, eg, the above-mentioned second power request, according to the above-mentioned first current error ⁇ I 1 and the second current error ⁇ I 2 .
  • the first transmission controller 61 may receive the above-mentioned second power request through the first wireless transmitter 71, and convert to the first voltage according to the second power request
  • the circuit 102 inputs the first PWM signal. By controlling the duty cycle of the first PWM signal, the output voltage of the first voltage conversion circuit 102 can be reduced.
  • the first transmitting coil 121 and the first receiving coil 221 are circular coils, and the first voltage transmission gain k1 of the first charging branch 31 can be selected as 0.8 or 0.9, the first charging branch
  • the frequency offset of 31 is 50KHz, and the frequency offset is larger. Therefore, the first transmitting coil 121 does not need to work at a fixed frequency, so the operating frequency of the first transmitting coil 121 can be adjusted to achieve the purpose of reducing the output power.
  • the first transmit controller 61 may also input a second PWM signal to the first inverter circuit 111 according to the second power request, and reduce the output current of the first inverter circuit 111 by controlling the frequency of the second PWM signal , to achieve the purpose of reducing the first charging power P1.
  • the second transmitting coil 122 and the second receiving coil 222 are magnetic rod coils, and the second voltage transmission gain k2 of the second charging branch 32 can be selected as 1.05, the second charging branch
  • the frequency offset of 32 is 20KHz, and the frequency offset is small. Therefore, the first transmitting coil 121 is suitable for working at a fixed frequency. Therefore, the second transmission controller 62 does not need to change the frequency of inputting the third PWM signal to the second inverter circuit 112, so that the first inverter circuit 111 operates at a fixed frequency.
  • the wireless charging receiver 20 and the adapter 101 can send the second power request generated by the charging manager 73 through the SCP communication protocol. to the adapter 101, so that the adapter 101 can reduce the output voltage according to the second power request, so that the voltages received by the first voltage conversion circuit 102 and the second inverter circuit 112 are both reduced, so as to reduce the wireless The purpose of charging the first charging power P1 and the second charging power P2 output by the transmitter 10.
  • S304 Transmit the first charging power P1 and the second charging power P2.
  • the above-mentioned S304 is the same as that of S204, and details are not repeated here.
  • the wireless charging receiver 20 performs the above-mentioned S205, since the first charging power P1 received by the first receiving coil 221 is reduced, the first output current I1 output by the first receiving controller 201 is related to the first charging power P1.
  • the target current I G1 is the same or close to, so that the first charging power P1 provided by the first receiving controller 201 to the battery 200 is reduced.
  • the second output current I 2 output by the second receiving controller 202 is the same as or close to the second target current I G2 , so that the second The second charging power P2 provided by the receiving controller 202 to the battery 200 is reduced.
  • the third charging power P3 provided by the first charging branch 31 and the second charging branch 32 to the battery 200 is smaller than the maximum charging power P max of the battery 200 , so as to charge the battery 200 with low power.
  • the wireless charging system 01 can follow the above preset charging strategy, according to the expected cooling
  • the temperature target value is obtained, and the target current matching the temperature target value is obtained, and then the output voltage of the adapter 101 and the first voltage conversion circuit 102 in the wireless charging transmitter 10 is adjusted.
  • the frequency of the first inverter circuit 111 may also be adjusted in combination, so that the first output current I 1 output by the first charging branch 31 is the same as or close to the first target current I G1 . Therefore, a reasonable proportion can be allocated to the magnitudes of the first output current I 1 and the second output current I 2 .
  • the temperature of one charging branch with a reduced output current can be lowered to the target temperature, and finally the purpose of lowering the temperature of the receiving end coil can be achieved.
  • the present application does not limit the mapping relationship between the temperature and the target current in the preset charging strategy. For example, when the temperature of any one of the first receiving coil 221 and the second receiving coil 222 is less than or equal to 28° C., the above mapping relationship can be set so that the temperature corresponding to the temperature less than or equal to 28° C.
  • the target current values are all greater than zero. In this way, the values of the first output current I 1 output by the first charging branch 31 and the second output current I 2 output by the second charging branch 32 are both greater than zero.
  • the target current value corresponding to 42°C can be set to 0 when the above mapping relationship is set, so that a charging branch with a higher temperature can be stopped in time to prevent the charging branch from supplying the output current to the battery 200. purpose of lowering the temperature.
  • the first transmit controller 61 may stop outputting the above-mentioned first PWM signal to the first voltage conversion circuit 102 and stop outputting the above-mentioned first PWM signal to the first inverter circuit 111 .
  • the second PWM signal causes the first voltage conversion circuit 102 and the first inverter circuit 111 to stop working. At this time, the first charging branch 31 stops working.
  • the second transmit controller 62 can stop outputting the third PWM signal to the second inverter circuit 112, so that the second inverter circuit 112 stops working . At this time, the second charging branch 32 stops working.
  • the temperature of the first receiving coil 221 and the temperature of the second receiving coil 222 are too high as the conditions that do not satisfy the high-power fast charging of the battery 200 as an example, and the reduction of the first charging branch 31 and an example of the output power of the second charging branch 32 .
  • the power of the battery 200 is close to full power.
  • the process of reducing the output power of the first charging branch 31 and the second charging branch 32 can be obtained in the same way. It is not repeated here.
  • the charging process of the wireless charging system 01 is described by taking as an example that the coils in the first charging branch 31 and the second charging branch 32 are both in the in-position state.
  • the wireless charging receiver 20 serving as a mobile phone is placed on the wireless charging transmitter 10 serving as a charging base, and the first transmitting coil 121 and the wireless charging receiver 20 in the wireless charging transmitter 10 The positions of the first receiving coils 221 are aligned, the first transmitting coils 121 are in the in-position state, and the first charging branch 31 where the first transmitting coils 121 and the first receiving coils 221 are located can work.
  • the positions of the second transmitting coil 122 in the wireless charging transmitter 10 and the second receiving coil 222 in the wireless charging receiver 20 are not aligned, the second transmitting coil 122 is in a non-position state, and the second transmitting coil 122 and The second charging branch 32 where the second receiving coil 222 is located cannot work.
  • the positions of the second transmitting coil 122 and the second receiving coil 222 cannot be aligned. In this case, S104 and S105 as shown in FIG. 9 may be performed.
  • the wireless charging system 01 executes the method of S104, which may specifically include S401 to S404 as shown in FIG. 14 .
  • the charging manager 73 can generate a first power request, and charge the wireless charging through the second wireless transceiver 72 Transmitter 10 sends the first power request.
  • the first power request is used to indicate that the charging power provided by the first charging branch 31 in the wireless charging transmitter 10 to the battery 200 is the maximum charging power P max of the battery 200 .
  • the first transmission controller 61 can receive the above-mentioned first power request through the first wireless transmitter 71, control the duty cycle of the first PWM signal, and can control the The magnitude of the output voltage of the first voltage conversion circuit 102 .
  • the first transmit controller 61 can also control the frequency of the first square wave signal V hb1 output by the first inverter circuit 111 by controlling the frequency of the second PWM signal according to the first power request, so that the first inverter The inverter circuit 111 can output the first charging power P1.
  • the first transmitting coil 121 may transmit the first charging power P1 to the first receiving coil 211 by transmitting the first alternating magnetic field.
  • the above-mentioned charging manager 73 can generate a second power request, so that the wireless charging transmitter 10 can reduce the power consumption.
  • the first charging power P1 with low output so that the charging power provided by the wireless charging transmitter 10 to the battery 200 is less than the maximum charging power P max of the battery 200 (ie, P1 ⁇ P max ), so as to realize low power charging.
  • the wireless charging receiver 20 serving as a mobile phone when placed on the wireless charging transmitter 10 serving as a charging base, and the first transmitting coil 121 in the wireless charging transmitter 10 and the wireless charging The positions of the first receiving coil 221 in the receiver 20 are misaligned, the first transmitting coil 121 is in a non-positioned state (for example, the first transmitting coil 121 is loosely installed and displaced), the first transmitting coil 121 and the first transmitting coil 121 are not in position.
  • the first charging branch 31 where the receiving coil 221 is located cannot work.
  • the positions of the second transmitting coil 122 in the wireless charging transmitter 10 and the second receiving coil 222 in the wireless charging receiver 20 are aligned, the second transmitting coil 122 is in the in-position state, the second transmitting coil 122 and the second The second charging branch 32 where the receiving coil 222 is located can work.
  • S106 and S107 as shown in FIG. 9 may be performed.
  • the independent process of the second charging branch 32 can be obtained in the same way as the independent working process of the first charging branch 31 , which will not be repeated here.
  • the charging power provided by the second charging branch 32 to the battery 200 is the maximum charging power P max of the battery 200 .
  • the above-mentioned conditions for high-power fast charging of the battery 200 are not satisfied, for example, when the temperature of the second receiving coil 222 is too high, the above-mentioned charging manager 73 can generate a second power request, so that the wireless charging transmitter 10 can reduce power consumption.
  • the wireless charging receiver 20 may further include a first charging circuit as shown in FIG. 10 .
  • the isolating switch 231 and the second isolating switch 232 are arranged in order to prevent the other charging branch from starting to work due to misoperation.
  • the first isolation switch 231 is electrically connected to the first receiving controller 201 and the second voltage converting circuit 210 , and the first receiving controller 201 is used to control the opening and closing of the first isolation switch 231 .
  • the second isolation switch 232 is electrically connected to the second receiving controller 202 and the second voltage converting circuit 210 .
  • the second receiving controller 202 is used to control the opening and closing of the second isolation switch 232.
  • the first charging branch 31 works alone, the first receiving controller 201 controls the first isolation switch 231 to turn on, and signal transmission can be performed between the first receiving controller 201 and the second voltage converting circuit 210 .
  • the second receiving controller 202 controls the second isolation switch 232 to be disconnected, and the second receiving controller 202 is disconnected from the second voltage converting circuit 210 .
  • the second receiving controller 202 controls the second isolation switch 232 to turn on, and signal transmission can be performed between the second receiving controller 202 and the second voltage converting circuit 210 .
  • the first receiving controller 201 controls the first isolation switch 231 to be disconnected, and the first receiving controller 201 is disconnected from the second voltage converting circuit 210 .
  • the first charging branch 31 or the second charging branch 32 can be independently controlled to work independently according to the support of the charging base and the temperature limiting measures of the charging branch.
  • the first charging branch 31 and the second charging branch 32 can also be controlled to work at the same time, so that the charging method is more flexible.
  • the charging process can be ended.
  • the wireless charging receiver 20 sends out a warning message that the charging is completed.
  • the warning information may use a light warning, a sound warning, or a warning image to remind the user that the charging process has ended.
  • Example 2 The difference from Example 1 is that in this example, the first transmitting coil 121 and the first receiving coil 221 in the first charging branch 31 shown in FIG. 14 are the above-mentioned magnet bar coil 50 (as shown in FIG. 4D ), The second transmitting coil 122 and the second receiving coil 222 in the second charging branch 32 are the above-mentioned circular coils 40 (as shown in FIG. 4D ).
  • the operating frequencies of the first transmitting coil 121 and the first receiving coil 221 in the first charging branch 31 (for example, in the range of 330KHz ⁇ 350KHz) are higher than that of the second transmitting coil in the second charging branch 32 .
  • the operating frequency of the coil 122 and the second receiving coil 222 (eg, below 210KHz).
  • the first voltage conversion circuit 102 in FIG. 14 is a booster circuit, and the first voltage transfer gain k1 of the first charging branch 31 is smaller than the second voltage transfer gain k2 of the second charging branch 32, ie k1 ⁇ k2.
  • the number of turns Nb1 of the first receiving coil 221, the number of turns Na1 of the first transmitting coil 121, the number of turns Nb2 of the second receiving coil 222, and the number of turns Na2 of the second transmitting coil 122 are set in the same manner as described above , and will not be repeated here.
  • the process of setting the first voltage transmission gain k1 of the first charging branch 31 to satisfy k1 ⁇ 1, and the second voltage transmission gain k2 of the second charging branch 32 to satisfy k2 ⁇ 1 is the same as described above, and will not be repeated here.
  • the temperature limiting measures of the charging branch when the first output current I1 output by the first charging branch 31 and the second output current I2 output by the second charging branch 32 meet different needs, the The adjustment method of the voltage output by the first transmitting coil 121 at the transmitting end of the charging branch 31 and the voltage output by the second transmitting coil 122 serving as the transmitting end of the second charging branch 32 can be obtained in the same way. Repeat.
  • the difference is that since the second transmitting coil 122 and the second receiving coil 222 in the second charging branch 32 in this example are the above-mentioned circular coils 40 , the second transmitting coil 122 and the second receiving coil 222 at this time
  • the frequency offset of the second charging branch 32 may be relatively large, for example, 50KHz. Therefore, the second transmitting coil 122 does not need to work at a fixed frequency. Therefore, in the process of adjusting the second output current I 2 output by the second charging branch 32 , the operating frequency of the second transmitting coil 122 can be adjusted.
  • the second transmission controller 62 can input the second PWM signal to the first inverter circuit 111 according to the power request sent by the charging manager 73, and adjust the first inverter circuit by controlling the frequency of the second PWM signal.
  • the purpose of the output current of circuit 111 is the purpose of the output current of circuit 111.
  • the first voltage conversion circuit 102 in the wireless charging transmitter 10 is a boosting circuit.
  • the first voltage conversion circuit 102 is a step-down (buck) circuit.
  • Example 2 is the same as Example 1 in that the first transmitting coil 121 and the first receiving coil 221 in the first charging branch 31 in FIG. 14 are the above-mentioned circular coils 40 (as shown in FIG. 4D ), and the second The second transmitting coil 122 and the second receiving coil 222 in the charging branch 32 are the above-mentioned magnetic bar coil 50 (as shown in FIG. 4D ).
  • the operating frequency of the second transmitting coil 122 and the second receiving coil 222 in the second charging branch 32 (for example, in the range of 330KHz ⁇ 350KHz) is higher than that of the first transmitting coil in the first charging branch 31 .
  • 121 and the operating frequency of the first receiving coil 221 (for example, below 210KHz).
  • the first voltage conversion circuit 102 in FIG. 14 is a step-down circuit.
  • the first voltage transfer gain k1 of the first charging branch 31 is greater than the second voltage transfer gain k2 of the second charging branch 32, that is, k1>k2.
  • the number of turns Nb1 of the first receiving coil 221 may be greater than the number of turns Na1 of the first transmitting coil 121 , that is, Nb1 > Na1 .
  • the ratio of the output voltage to the input voltage of the transformer formed by the first transmitting coil 121 and the first receiving coil 221 as a circular coil is >1, so that k1 >1.
  • the number of turns Nb2 of the second receiving coil 222 is less than or equal to the number of turns Na2 of the second transmitting coil 122, that is, Nb2 ⁇ Na2.
  • the ratio of the output voltage to the input voltage of the transformer formed by the second transmitting coil 122 and the second receiving coil 222 as the magnetic bar coil is less than or equal to 1, so that k2 ⁇ 1.
  • the first voltage transfer gain k1 of the first charging branch 31 satisfies k1>1, and the setting process of the second voltage transfer gain k2 of the second charging branch 32 satisfying k2 ⁇ 1 is the same as described above and will not be repeated here.
  • the temperature limiting measures of the charging branch when the first output current I1 output by the first charging branch 31 and the second output current I2 output by the second charging branch 32 meet different needs, the The method for adjusting the voltage output by the first transmitting coil 121 at the transmitting end of the charging branch 31 and the method for adjusting the voltage output by the second transmitting coil 122 serving as the transmitting end of the second charging branch 32 are the same as described above, and will not be repeated here. Repeat.
  • the first transmitting coil 121 and the first receiving coil 221 in the first charging branch 31 shown in FIG. 14 are the above-mentioned magnet bar coil 50 (as shown in FIG. 4D ).
  • the second transmitting coil 122 and the second receiving coil 222 in the two charging branches 32 are the above-mentioned circular coils 40 (as shown in FIG. 4D ).
  • the operating frequencies of the first transmitting coil 121 and the first receiving coil 221 in the first charging branch 31 (for example, in the range of 330KHz ⁇ 350KHz) are higher than that of the second transmitting coil in the second charging branch 32 .
  • the operating frequency of the coil 122 and the second receiving coil 222 (eg, below 210KHz).
  • the first voltage conversion circuit 102 in FIG. 14 is a step-down circuit.
  • the first voltage transfer gain k1 of the first charging branch 31 is greater than the second voltage transfer gain k2 of the second charging branch 32, that is, k1>k2.
  • the number of turns Nb1 of the first receiving coil 221, the number of turns Na1 of the first transmitting coil 121, the number of turns Nb2 of the second receiving coil 222, and the number of turns Na2 of the second transmitting coil 122 are set in the same manner as described above. It is not repeated here.
  • the first voltage transfer gain k1 of the first charging branch 31 satisfies k1>1, and the setting process of the second voltage transfer gain k2 of the second charging branch 32 satisfying k2 ⁇ 1 is the same as described above and will not be repeated here.
  • the temperature limiting measures of the charging branch when the first output current I1 output by the first charging branch 31 and the second output current I2 output by the second charging branch 32 meet different needs, the The method for adjusting the voltage output by the first transmitting coil 121 at the transmitting end of the charging branch 31 and the method for adjusting the voltage output by the second transmitting coil 122 serving as the transmitting end of the second charging branch 32 are the same as described above, and will not be repeated here. Repeat.
  • the first voltage conversion circuit 102 in the wireless charging transmitter 10 is a boost circuit or a step-down circuit, as long as the voltage transfer gain of the charging branch without the first voltage conversion circuit 102 is set close to 1, for example When greater than or equal to 1, the voltage gain of the other charging branch is less than 1. Alternatively, when the voltage transfer gain of the charging branch in which the first voltage conversion circuit 102 is not set is less than or equal to 1, the voltage gain of the other charging branch is greater than 1.
  • the voltages output by the first receiving controller 201 and the second receiving controller 202 connected in parallel in the wireless charging receiver 20 can be similar to or the same, so that the first output current I 1 and the first output current I 1 and the first output current I 1 output by the first charging branch 31 and the second receiving controller 202 can be similar or identical.
  • the second output current I 2 output by the two charging branches 32 is precisely controlled.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Selon des modes de réalisation, la présente invention se rapporte au domaine technique de la charge. L'invention concerne un transmetteur de charge sans fil, un récepteur de charge sans fil et un système de charge sans fil, utilisés pour améliorer le problème selon lequel une vitesse de charge sans fil est lente. Le transmetteur de charge sans fil comprend un premier circuit de conversion de tension, un premier circuit inverseur, une première bobine de transmission, un second circuit inverseur et une seconde bobine de transmission. Dans le système de charge sans fil, une première branche de charge dans laquelle la première bobine de transmission se situe comprend un premier gain de transmission de tension k1, une seconde branche de charge dans laquelle la seconde bobine de transmission se situe comprend un second gain de transmission de tension k2, et k1 est différent de k2. Lorsqu'un circuit de conversion de tension unique est disposé dans le transmetteur de charge sans fil, la première tension de sortie Vo1 de la première branche de charge est identique à la seconde tension de sortie Vo2 de la seconde branche de charge, de telle sorte que le courant de sortie fourni séparément par la première branche de charge dans laquelle la première bobine de transmission se situe et la seconde branche de charge dans laquelle la seconde bobine de transmission se situe pour une batterie peut être commandé avec précision.
PCT/CN2021/114137 2020-08-26 2021-08-23 Transmetteur de charge sans fil, récepteur de charge sans fil et système de charge sans fil WO2022042498A1 (fr)

Applications Claiming Priority (4)

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CN202010873200.3 2020-08-26
CN202010873200 2020-08-26
CN202110038596.4 2021-01-12
CN202110038596.4A CN114123537B (zh) 2020-08-26 2021-01-12 无线充电发射器、无线充电接收器及无线充电系统

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116938291A (zh) * 2023-07-21 2023-10-24 维沃移动通信有限公司 近场通信nfc设备及其通信方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201143251A (en) * 2011-08-04 2011-12-01 Fu Da Tong Technology Co Ltd Wireless charging coil structure of electronic device
CN202424250U (zh) * 2012-01-13 2012-09-05 富达通科技股份有限公司 机电装置的槽型感应式充电器
KR20180005421A (ko) * 2016-07-06 2018-01-16 엘지이노텍 주식회사 폴더블 무선 전력 송신기 및 제어 방법
US20180090968A1 (en) * 2016-09-28 2018-03-29 Motorola Mobility Llc Electromagnetic Coupling Interface and Method for Managing an Electromagnetic Coupling Capability
CN108923509A (zh) * 2018-07-06 2018-11-30 维沃移动通信有限公司 一种无线充电发射电路、无线充电接收电路及方法
CN110518707A (zh) * 2019-08-14 2019-11-29 维沃移动通信有限公司 发射端设备、接收端设备及无线充电方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201143251A (en) * 2011-08-04 2011-12-01 Fu Da Tong Technology Co Ltd Wireless charging coil structure of electronic device
CN202424250U (zh) * 2012-01-13 2012-09-05 富达通科技股份有限公司 机电装置的槽型感应式充电器
KR20180005421A (ko) * 2016-07-06 2018-01-16 엘지이노텍 주식회사 폴더블 무선 전력 송신기 및 제어 방법
US20180090968A1 (en) * 2016-09-28 2018-03-29 Motorola Mobility Llc Electromagnetic Coupling Interface and Method for Managing an Electromagnetic Coupling Capability
CN108923509A (zh) * 2018-07-06 2018-11-30 维沃移动通信有限公司 一种无线充电发射电路、无线充电接收电路及方法
CN110518707A (zh) * 2019-08-14 2019-11-29 维沃移动通信有限公司 发射端设备、接收端设备及无线充电方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116938291A (zh) * 2023-07-21 2023-10-24 维沃移动通信有限公司 近场通信nfc设备及其通信方法

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