WO2021135751A1 - 电子设备、无线充电接收装置及控制方法、无线充电*** - Google Patents
电子设备、无线充电接收装置及控制方法、无线充电*** Download PDFInfo
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- WO2021135751A1 WO2021135751A1 PCT/CN2020/131893 CN2020131893W WO2021135751A1 WO 2021135751 A1 WO2021135751 A1 WO 2021135751A1 CN 2020131893 W CN2020131893 W CN 2020131893W WO 2021135751 A1 WO2021135751 A1 WO 2021135751A1
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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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
- H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
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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
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00045—Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Definitions
- This application relates to the field of wireless charging technology, and in particular to an electronic device, a wireless charging receiving device and a control method, and a wireless charging system.
- Wireless charging technology uses conductive media such as electric field, magnetic field, microwave, or laser to realize the wireless transmission of electric energy. Due to its advantages of no wire restriction, no plug-in, etc., it is more and more widely used in electronic equipment . However, when the above-mentioned electronic devices such as mobile phones perform wireless charging, it is impossible to switch between the high-power fast charging mode and the low-power slow charging mode.
- the embodiments of the present application provide an electronic device, a wireless charging receiving device and a control method, and a wireless charging system, which are used to switch between two charging modes of high-power fast charging and low-power slow charging.
- the first aspect of the embodiments of the present application provides an electronic device.
- the electronic equipment includes a wireless charging receiving device, a battery and a circuit board.
- the wireless charging receiving device includes a first communication circuit, a first controller, a first rectifying circuit and a first receiving coil.
- the first communication circuit, the first controller and the first rectifier circuit are arranged on the circuit board.
- the first communication circuit is coupled with the first controller.
- the first communication circuit is used to receive charging data, and the charging data is used to indicate the charging type.
- the first controller is coupled to the first rectifier circuit, and is used for identifying the charging type as the first charging type according to the charging data, outputting a first rectification control signal, and controlling the first rectifying circuit to operate in a half-bridge mode.
- the electronic device can be charged with low power.
- the first controller is also used for identifying that the charging type is the second charging type according to the charging data, outputting a second rectification control signal, and controlling the first rectification circuit to operate in a full-bridge mode.
- the electronic device can be charged with high power.
- the first receiving coil is coupled to the first rectifier circuit, and is used for receiving the alternating magnetic field and outputting the first induced voltage.
- the first rectifier circuit is also coupled to the battery, and the first rectifier circuit is used for converting the first induced voltage into a DC power supply voltage in the full-bridge mode or the half-bridge mode, and the power supply voltage is used for powering the battery. In this way, the electronic device provided by the embodiment of the present application can be compatible with two charging methods for charging.
- the wireless charging receiving device further includes a second receiving coil and a starting circuit arranged on the circuit board.
- the second receiving coil is used for receiving an alternating magnetic field and outputting a second induced voltage.
- the inductance of the first receiving coil is smaller than the inductance of the second receiving coil.
- the starting circuit is coupled with the second receiving coil.
- the starting circuit is used for converting the second induced voltage into a first voltage of direct current and transmitting it to the first controller.
- the first voltage is greater than or equal to the lowest operating voltage of the first controller.
- the first controller is further configured to output a first rectification control signal to the first rectification circuit after receiving the first voltage. It can be seen from the above that the transmitting coil in the wireless charging and transmitting device can transmit an alternating magnetic field.
- the first receiving coil in the electronic device receives the alternating magnetic field and outputs a first induced voltage
- the second receiving coil receives the alternating magnetic field and outputs a second induced voltage.
- the transmitting coil and the first receiving coil can form a voltage converter.
- the transmitting coil and the second receiving coil can form another voltage converter. Based on this, on the one hand, since the inductance of the first receiving coil is smaller than the inductance of the second receiving coil, the inductance of the first receiving coil can be made smaller than the inductance of the transmitting coil. In this way, the voltage converter formed by the transmitting coil and the first receiving coil can have a voltage step-down function.
- the input voltage of the transmitting coil will increase, but the voltage can be stepped down by the voltage converter formed by the transmitting coil and the first receiving coil, thereby reducing the first
- the number of cascades of the voltage conversion circuit at the output end of the rectifier circuit can reduce the problem of large power transmission efficiency loss due to the excessive number of cascades of the voltage conversion circuit in the process of high-power charging.
- the voltage converter formed by the transmitting coil and the first receiving coil has a step-down effect, the voltage output by the first rectifier circuit will be too small to drive the first controller.
- the startup circuit coupled to the second receiving coil can convert the second induced voltage output by the second receiving coil into a first Voltage. Since the first voltage is greater than or equal to the minimum operating voltage of the first controller, the first voltage can drive the first controller so that the first controller can output the first rectification control signal and the second rectification control signal to the first rectification circuit Signal, so that the first rectifier circuit can be controlled to provide the above-mentioned supply voltage to the voltage conversion circuit.
- the input voltage can be reduced through the first receiving coil with a small inductance, so as to reduce the power consumption of high-power charging.
- the normal driving of the first controller can also be realized through the second receiving coil.
- the wireless charging receiving device further includes a first voltage stabilizing circuit arranged on the circuit board.
- the first voltage stabilizing circuit is coupled with the battery and the first controller.
- the first voltage stabilizing circuit is used for transmitting the voltage of the battery to the first controller when the power supply voltage is lower than the preset voltage stabilizing voltage of the first voltage stabilizing circuit, so as to supply power to the first controller.
- the first voltage stabilizing circuit is also used for disconnecting the battery and the first controller when the supply voltage is greater than the preset voltage stabilizing voltage of the first voltage stabilizing circuit.
- the first controller is coupled to the output terminal of the first rectifier circuit. Therefore, the power supply voltage output by the first rectifier circuit is also used to supply power to the first controller.
- the first voltage stabilizing circuit can provide the remaining power in the battery to the first controller to supply power to the first controller, so that the first controller outputs the first rectification control signal and the second rectification control signal to the first rectification circuit.
- the wireless charging receiving device further includes a voltage conversion circuit arranged on the circuit board.
- the voltage conversion circuit is coupled with the first rectifier circuit and the battery.
- the voltage conversion circuit is used to convert the supply voltage and use the converted voltage to power the battery.
- the winding mode of the first receiving coil and the second receiving coil may be that the first receiving coil is arranged inside the second receiving coil.
- the first end and the second end of the first receiving coil are located between the first end and the second end of the second receiving coil.
- the winding method of the first receiving coil and the second receiving coil may also be that the second receiving coil is arranged inside the first receiving coil.
- the first end and the second end of the first receiving coil are located between the first end and the second end of the second receiving coil.
- the winding method of the first receiving coil and the second receiving coil may also be such that a part of the second receiving coil is arranged inside the first receiving coil, and the other part is arranged outside the first receiving coil.
- the first end and the second end of the first receiving coil are located between the first end and the second end of the second receiving coil.
- the voltage input by the sending coil is a fixed value. Therefore, when the alignment position of the second receiving coil and the transmitting coil in the base has a large deviation, the induced voltage output by the second receiving coil is smaller. Therefore, when the position deviation between the second receiving coil and the transmitting coil reaches the preset maximum value, for example, 10mm, it can still be ensured that the induced voltage output by the second receiving coil is converted to the first controller for power supply after the startup circuit.
- the first controller is enabled to output the first rectification control signal and the second rectification control signal to the first rectification circuit.
- the inductance of the second receiving coil may be 4 times the inductance of the first receiving coil.
- the starting circuit may include a second rectifying circuit.
- the second rectifier circuit includes a first diode and a second diode connected in series, and a third diode and a fourth diode connected in series.
- the cathodes of the first diode and the third diode are coupled to the first controller.
- the anodes of the second diode and the fourth diode are both coupled to the ground terminal.
- the wireless charging receiving device further includes a first resonant capacitor. The first end of the first resonant capacitor is coupled to the first end of the second receiving coil, and the second end of the first resonant capacitor is coupled to the anode of the first diode and the cathode of the second diode.
- the second end of the second receiving coil is coupled to the anode of the third diode and the cathode of the fourth diode.
- the above-mentioned second rectifier circuit is a full-bridge rectifier circuit, and only works in a full-bridge mode.
- the starting circuit includes a second rectifier circuit.
- the second rectifier circuit includes a first diode and a second diode connected in series.
- the cathode of the first diode is coupled to the first controller.
- the wireless charging receiving device further includes a first resonant capacitor.
- the first end of the first resonant capacitor is coupled to the first end of the second receiving coil, and the second end of the first resonant capacitor is coupled to the anode of the first diode and the cathode of the second diode.
- the second terminal of the second receiving coil and the anode of the second diode are both coupled to the ground terminal.
- the above-mentioned second rectifier circuit is a half-bridge rectifier circuit and only works in the half-bridge mode.
- the starting circuit includes a second rectifier circuit.
- the second rectifier circuit includes a first diode and a second diode connected in series.
- the wireless charging receiving device also includes a first resonant capacitor and a second resonant capacitor connected in series.
- the cathode of the first diode and the first end of the first resonant capacitor are coupled to the first controller.
- the anode of the second diode and the second terminal of the second resonant capacitor are both coupled to the ground terminal.
- the first end of the second receiving coil is coupled with the anode of the first diode and the cathode of the second diode.
- the second end of the second receiving coil is coupled between the second end of the first resonant capacitor and the first end of the second resonant capacitor.
- the above-mentioned second rectifier circuit is a half-bridge rectifier circuit and only works in the half-bridge mode.
- the startup circuit further includes a second voltage stabilizing circuit.
- the second voltage stabilizing circuit is coupled with the second rectifier circuit and the first controller.
- the second voltage stabilizing circuit is used for converting the voltage output by the second rectifying circuit into the first voltage when the supply voltage is less than the preset voltage stabilizing voltage of the second stabilizing circuit.
- the second voltage stabilizing circuit is also used for disconnecting the second rectifier circuit and the first controller when the supply voltage is greater than the preset voltage stabilizing voltage of the second voltage stabilizing circuit.
- the first controller is coupled to the output terminal of the first rectifier circuit, and the power supply voltage output by the first rectifier circuit can supply power to the first controller.
- the second voltage stabilizing circuit can convert the voltage output by the second rectification circuit into the first voltage to supply power to the first controller, so that the first controller outputs the first rectification control signal and the second rectification control signal to the first rectification circuit.
- the second stabilized circuit will disconnect the second rectifier circuit and the first controller.
- the power supply voltage output by the first rectifier circuit can supply power to the first controller.
- the starter circuit only needs to work when the output voltage of the first rectifier circuit is too small to drive the first controller. After the first rectifier circuit outputs the supply voltage, the starter circuit can stop working.
- the startup circuit further includes a second voltage stabilizing circuit.
- the second voltage stabilizing circuit is coupled to the second rectifying circuit and the first controller, and the second voltage stabilizing circuit is used for converting the voltage output by the second rectifying circuit into the first voltage. In this way, during the working process of the wireless charging receiving device, the startup circuit will always provide the first voltage to the first controller.
- a wireless charging system including a wireless charging sending device, and any electronic device as described above.
- the wireless charging transmitting device includes a transmitting coil.
- the transmitting coil is used to emit an alternating magnetic field.
- the first receiving coil in the electronic device is used for receiving the alternating magnetic field and outputting the first induced voltage.
- the inductance of the transmitting coil is greater than the inductance of the first receiving coil.
- the first communication circuit in the electronic device is used to receive charging data, and the charging data is used to indicate the charging type.
- the first communication circuit is also used to send a first voltage regulation instruction.
- the first voltage regulation command is used to instruct to increase the input voltage of the first receiving coil.
- the wireless charging and sending system also includes an adapter coupled with the sending coil.
- the wireless charging and sending device further includes a second communication circuit and a second controller.
- the second communication circuit is coupled to the first communication circuit.
- the second communication circuit is used for sending charging data and receiving the first voltage regulation instruction.
- the second controller is coupled with the adapter and the second communication circuit.
- the second controller is used for generating a first voltage regulation control signal according to the first voltage regulation instruction, and the first voltage regulation control signal is used for increasing the output voltage of the adapter. In this way, high-power charging of electronic devices can be achieved by increasing the output voltage of the adapter.
- the first communication circuit in the electronic device is used to receive charging data, and the charging data is used to indicate the charging type.
- the first communication circuit is also used to send a first voltage regulation instruction.
- the first voltage regulation command is used to instruct to increase the input voltage of the first receiving coil.
- the wireless charging and sending system also includes an adapter coupled with the sending coil.
- the wireless charging and sending device also includes a voltage regulating circuit, a second communication circuit, and a second controller.
- the voltage regulating circuit is coupled with the transmitting coil and the adapter.
- the voltage regulating circuit is used to regulate the voltage output from the adapter to the sending coil.
- the second communication circuit is coupled to the first communication circuit, and the second communication circuit is used for sending charging data and receiving the first voltage regulation command.
- the second controller is coupled to the voltage regulating circuit and the second communication circuit, and the second controller generates the first voltage regulating control signal according to the first voltage regulating command.
- the first voltage regulation control signal is used to increase the output voltage of the voltage regulation circuit. In this way, high-power charging of electronic devices can be achieved by increasing the output voltage of the voltage regulating circuit.
- the third aspect of the embodiments of the present application provides a wireless charging receiving device.
- the wireless charging receiving device includes a first communication circuit, a first controller, a first rectifying circuit and a first receiving coil.
- the first communication circuit is coupled with the first controller.
- the first communication circuit is used to receive charging data, and the charging data is used to indicate the charging type.
- the first controller is coupled to the first rectifier circuit, and is used for identifying that the charging type is the first charging type according to the charging data, outputting a first rectification control signal, and controlling the first rectifying circuit to operate in a half-bridge mode.
- the first controller is also used for identifying that the charging type is the second charging type according to the charging data, outputting a second rectification control signal, and controlling the first rectification circuit to operate in a full-bridge mode.
- the first receiving coil is coupled to the first rectifier circuit, and is used for receiving the alternating magnetic field and outputting the first induced voltage.
- the first rectifier circuit is used to convert the first induced voltage into a DC power supply voltage, and the power supply voltage is used to power the battery.
- the wireless charging receiving device further includes a second receiving coil and a starting circuit.
- the second receiving coil is used to receive the alternating magnetic field and output a second induced voltage.
- the inductance of the first receiving coil is smaller than the inductance of the second receiving coil.
- the starting circuit is coupled with the second receiving coil.
- the starting circuit is used for converting the second induced voltage into a first voltage of direct current and transmitting it to the first controller.
- the first voltage is greater than or equal to the lowest operating voltage of the first controller.
- the first controller is further configured to output a first rectification control signal to the first rectification circuit after receiving the first voltage.
- the wireless charging receiving device further includes a first voltage stabilizing circuit.
- the first voltage stabilizing circuit is coupled with the battery and the first controller.
- the first voltage stabilizing circuit is used for transmitting the voltage of the battery to the first controller when the power supply voltage is lower than the preset voltage stabilizing voltage of the first voltage stabilizing circuit, so as to supply power to the first controller.
- the first voltage stabilizing circuit is also used for disconnecting the battery and the first controller when the supply voltage is greater than the preset voltage stabilizing voltage of the first voltage stabilizing circuit.
- the first controller is coupled to the output terminal of the first rectifier circuit. Therefore, the power supply voltage output by the first rectifier circuit is also used to supply power to the first controller.
- the technical effect of the above-mentioned first voltage stabilizing circuit is the same as that described above, and will not be repeated here.
- the wireless charging receiving device further includes a voltage conversion circuit.
- the voltage conversion circuit is coupled with the first rectifier circuit and the battery.
- the voltage conversion circuit is used to convert the supply voltage and use the converted voltage to power the battery.
- the winding mode of the first receiving coil and the second receiving coil may be that the first receiving coil is arranged inside the second receiving coil.
- the first end and the second end of the first receiving coil are located between the first end and the second end of the second receiving coil.
- the winding method of the first receiving coil and the second receiving coil may also be that the second receiving coil is arranged inside the first receiving coil.
- the first end and the second end of the first receiving coil are located between the first end and the second end of the second receiving coil.
- the winding method of the first receiving coil and the second receiving coil may also be such that a part of the second receiving coil is arranged inside the first receiving coil, and the other part is arranged outside the first receiving coil.
- the first end and the second end of the first receiving coil are located between the first end and the second end of the second receiving coil.
- the inductance of the second receiving coil is 4 times the inductance of the first receiving coil.
- the inductance of the second receiving coil and the technical effect of setting the inductance of the first receiving coil are the same as described above, and will not be repeated here.
- the starting circuit includes a second rectifier circuit.
- the second rectifier circuit includes a first diode and a second diode connected in series, and a third diode and a fourth diode connected in series.
- the cathodes of the first diode and the third diode are coupled to the first controller.
- the anodes of the second diode and the fourth diode are both coupled to the ground terminal.
- the wireless charging receiving device further includes a first resonant capacitor. The first end of the first resonant capacitor is coupled to the first end of the second receiving coil, and the second end of the first resonant capacitor is coupled to the anode of the first diode and the cathode of the second diode.
- the second end of the second receiving coil is coupled to the anode of the third diode and the cathode of the fourth diode.
- the above-mentioned second rectifier circuit is a full-bridge rectifier circuit, and only works in a full-bridge mode.
- the starting circuit includes a second rectifier circuit.
- the second rectifier circuit includes a first diode and a second diode connected in series.
- the cathode of the first diode is coupled to the first controller.
- the wireless charging receiving device further includes a first resonant capacitor.
- the first end of the first resonant capacitor is coupled to the first end of the second receiving coil, and the second end of the first resonant capacitor is coupled to the anode of the first diode and the cathode of the second diode.
- the second terminal of the second receiving coil and the anode of the second diode are both coupled to the ground terminal.
- the above-mentioned second rectifier circuit is a half-bridge rectifier circuit and only works in the half-bridge mode.
- the starting circuit includes a second rectifier circuit.
- the second rectifier circuit includes a first diode and a second diode connected in series.
- the wireless charging receiving device also includes a first resonant capacitor and a second resonant capacitor connected in series.
- the cathode of the first diode and the first end of the first resonant capacitor are coupled to the first controller.
- the anode of the second diode and the second terminal of the second resonant capacitor are both coupled to the ground terminal.
- the first end of the second receiving coil is coupled with the anode of the first diode and the cathode of the second diode.
- the second end of the second receiving coil is coupled between the second end of the first resonant capacitor and the first end of the second resonant capacitor.
- the above-mentioned second rectifier circuit is a half-bridge rectifier circuit and only works in the half-bridge mode.
- the startup circuit further includes a voltage stabilizing circuit.
- the second voltage stabilizing circuit is coupled with the second rectifier circuit and the first controller.
- the second voltage stabilizing circuit is used for converting the voltage output by the second rectifying circuit into the first voltage when the supply voltage is less than the preset voltage stabilizing voltage of the second stabilizing circuit.
- the second voltage stabilizing circuit is also used for disconnecting the second rectifier circuit and the first controller when the supply voltage is greater than the preset voltage stabilizing voltage of the second voltage stabilizing circuit.
- the first controller is coupled to the output terminal of the first rectifier circuit, and the power supply voltage output by the first rectifier circuit can supply power to the first controller. The technical effect of the second voltage stabilizing circuit is the same as that described above, and will not be repeated here.
- the startup circuit further includes a second voltage stabilizing circuit.
- the second voltage stabilizing circuit is coupled to the second rectifying circuit and the first controller, and the second voltage stabilizing circuit is used for converting the voltage output by the second rectifying circuit into the first voltage. In this way, during the working process of the wireless charging receiving device, the startup circuit will always provide the first voltage to the first controller.
- the fourth aspect of the embodiments of the present application provides a method for controlling a wireless charging receiving device.
- the wireless charging receiving device includes a first communication circuit, a first controller, a first rectifying circuit, and a first receiving coil.
- the first communication circuit is coupled with the first controller.
- the first rectifier circuit is coupled with the first receiving coil, the first controller and the battery.
- the above-mentioned control method includes: first, the first communication circuit receives the activation signal, and the wireless charging receiving device is activated. Next, the first receiving coil receives the alternating magnetic field and outputs the first induced voltage. Next, the first controller outputs the first rectification control signal to control the first rectification circuit to operate in the half-bridge mode.
- the first rectifier circuit converts the first induced voltage into a supply voltage.
- the first communication circuit receives charging data, and the charging data is used to indicate the charging type.
- the first controller recognizes that the charging type is the second charging type according to the charging data, outputs a second rectification control signal, and controls the first rectification circuit to operate in a full-bridge mode.
- the first rectifier circuit converts the first induced voltage into a direct current supply voltage.
- the battery receives the supply voltage and is charged.
- the method further includes: first, the first controller sends a second voltage adjustment instruction.
- the second voltage regulation command is used to instruct to reduce the input voltage of the first receiving coil.
- the first controller outputs a first rectification control signal to the first rectification circuit, and controls the first rectification circuit to operate in a half-bridge mode. In this way, when high-power charging is performed on the electronic device, it can also be switched to low-power charging as needed.
- the wireless charging receiving device further includes a second receiving coil and a starting circuit.
- the inductance of the first receiving coil is smaller than the inductance of the second receiving coil.
- the method further includes: first, the second receiving coil receives the alternating magnetic field and outputs a second induced voltage.
- the startup circuit converts the second induced voltage into a first DC voltage and transmits it to the first controller.
- the first voltage is greater than or equal to the lowest operating voltage of the first controller.
- the wireless charging receiving device further includes a first voltage stabilizing circuit.
- the first voltage stabilizing circuit is coupled with the battery and the first controller. Before the first controller outputs the first rectification control signal, the method further includes: when the supply voltage is less than the preset stabilized voltage of the first stabilized circuit, the first stabilized circuit transmits the voltage of the battery to the first controller. Or, when the supply voltage is greater than the preset regulated voltage of the first stabilizing circuit, the first stabilizing circuit disconnects the battery and the first controller. The first controller receives the supply voltage.
- the technical effect of the above-mentioned first voltage stabilizing circuit is the same as that described above, and will not be repeated here.
- the wireless charging receiving device further includes a voltage conversion circuit.
- the voltage conversion circuit is coupled with the first rectifier circuit and the battery.
- the method further includes the voltage conversion circuit in the wireless charging receiving device converting the supply voltage, and using the converted voltage to supply power to the battery.
- the technical effect of the voltage conversion circuit is the same as that described above, and will not be repeated here.
- FIG. 1a is a schematic structural diagram of an electronic device and a wireless charging system provided by an embodiment of this application;
- Fig. 1b is a schematic diagram of the structure of the electronic device in Fig. 1a;
- 2a is a schematic structural diagram of a wireless charging system provided by an embodiment of the application.
- 2b is a schematic structural diagram of another wireless charging system provided by an embodiment of this application.
- 2c is a schematic structural diagram of another wireless charging system provided by an embodiment of the application.
- 2d is a schematic structural diagram of another wireless charging system provided by an embodiment of this application.
- FIG. 3a is a schematic structural diagram of another wireless charging system provided by an embodiment of the application.
- 3b is a schematic structural diagram of another wireless charging system provided by an embodiment of the application.
- FIG. 4 is a schematic structural diagram of another wireless charging system provided by an embodiment of the application.
- FIG. 5a is a schematic diagram of a winding method of the first receiving coil and the second receiving coil according to an embodiment of the application;
- FIG. 5b is a schematic diagram of another winding method of the first receiving coil and the second receiving coil according to an embodiment of the application;
- FIG. 5c is a schematic diagram of another winding method of the first receiving coil and the second receiving coil according to an embodiment of the application;
- FIG. 6a is a schematic diagram of another structure of a wireless charging receiving device provided by an embodiment of the application.
- FIG. 6b is a schematic diagram of another structure of a wireless charging receiving device provided by an embodiment of the application.
- FIG. 7 is a schematic diagram of another structure of a wireless charging receiving device provided by an embodiment of the application.
- FIG. 8 is a flowchart of a wireless charging control method provided by an embodiment of the application.
- Fig. 9a is a schematic diagram of a working mode of the starting circuit in Fig. 7;
- FIG. 9b is a schematic diagram of another working mode of the starting circuit in FIG. 7;
- Fig. 10a is a timing diagram of a control signal of the first rectifier circuit in Fig. 7;
- FIG. 10b is a timing diagram of another control signal of the first rectifier circuit in FIG. 7;
- FIG. 10c is a timing diagram of another control signal of the first rectifier circuit in FIG. 7;
- Fig. 11a is a schematic diagram of a working mode of the first rectifier circuit in Fig. 7;
- FIG. 11b is a schematic diagram of another working mode of the first rectifier circuit in FIG. 7;
- FIG. 12 is a timing diagram of another control signal of the first rectifier circuit in FIG. 7;
- FIG. 13a is a schematic diagram of another working mode of the first rectifier circuit in FIG. 7;
- FIG. 13b is a schematic diagram of another working mode of the first rectifier circuit in FIG. 7;
- FIG. 14 is a schematic diagram of another structure of a wireless charging receiving device provided by an embodiment of the application.
- FIG. 15 is a schematic diagram of another structure of a wireless charging receiving device provided by an embodiment of the application.
- azimuthal terms such as “upper” and “lower” may include but are not limited to the directions defined relative to the schematic placement of the 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 can be changed according to the changes in the orientation of the parts in the drawings.
- connection should be understood in a broad sense.
- “connected” can be a fixed connection, a detachable connection, or a whole; it can be a direct connection, or Can be indirectly connected through an intermediary.
- the term “coupling” may be an electrical connection method for signal transmission.
- “Coupling” can be a direct electrical connection or an indirect electrical connection through an intermediary.
- An embodiment of the present application provides an electronic device.
- the electronic devices include mobile phones, tablets, computers with wireless transceiver functions, smart wearable products (for example, smart watches, smart bracelets), virtual reality (VR) terminal devices, and augmented reality (augmented reality AR) terminal equipment, etc. have wireless equipment.
- the above-mentioned electronic devices may also be electronic products such as wireless charging electric vehicles, wireless charging small household appliances (such as soymilk machines, sweeping robots), and drones.
- the embodiments of the present application do not impose special restrictions on the specific form of the above-mentioned electronic device. For the convenience of description, the following description takes the electronic device 01 as a mobile phone as shown in FIG. 1a as an example.
- the wireless charging system provided in the embodiment of the present application includes a wireless charging receiving (receive, RX) device 20 provided in the electronic device 01, as shown in FIG.
- the above-mentioned wireless charging system further includes a wireless charging transmitting (TX) device 30 arranged in the charging base 02 as shown in FIG. 1a, and an adapter 40 coupled to the wireless charging transmitting device 30.
- the adapter 40 is used to provide charging power.
- the adapter 40 can convert 220V alternating current into direct current (for example, 5V or 10V, etc.) according to the need of charging power, and transmit the direct current to the wireless charging sending device 30.
- the above-mentioned electronic device 01 takes a mobile phone as an example, as shown in FIG. 1b, and mainly includes a display panel (DP) 10.
- the display screen 10 may be a liquid crystal display (LCD) screen or an organic light emitting diode (OLED) display screen. This application does not limit this.
- the above-mentioned electronic device 01 also includes a middle frame 11 and a housing 12 as shown in Fig. 1b.
- the display screen 10 and the housing 12 are respectively located on both sides of the middle frame 11, the back of the display screen 10 faces the housing 12, and the display screen 10 and the housing 12 are connected by the middle frame 11.
- the middle frame 11 includes a carrying board 110 and a frame 111 around the carrying board 110.
- the electronic device 01 may also include printed circuit boards (printed circuit boards, PCB).
- the PCB and the battery 50 are arranged on the side surface of the carrier board 110 facing the housing 12.
- the above-mentioned wireless charging receiving device 20 may include a first oscillating circuit 202 as shown in FIG. 2a.
- the first oscillating circuit 202 may include a first receiving coil 211 and a third resonance capacitor CRX3 as shown in FIG. 2b.
- the first receiving coil 211 may be arranged on the carrying plate 110 as shown in FIG. 1 b, or may also be arranged on the side surface of the battery 50 facing the casing 12.
- the wireless charging sending device 30 includes a direct current (DC) to alternating current (AC) converter, that is, a DC/AC 302 and a second oscillating circuit 303.
- the DC/AC 302 is coupled to the adapter 40 and can convert the direct current output by the adapter 40 into alternating current.
- the second oscillating circuit 303 is coupled to the DC/AC302.
- the second oscillating circuit 303 may include a fourth resonant capacitor C TX and a transmitting coil 311 as shown in FIG. 2b.
- the DC/AC 302 converts the direct current output by the adapter 40 into alternating current and transmits it to the second oscillating circuit 303, which can cause the transmitting coil 311 in the second oscillating circuit 303 to generate high-frequency alternating current and emit an alternating magnetic field.
- the first receiving coil 211 in the first oscillating circuit 202 receives the above-mentioned alternating magnetic field and outputs the first induced voltage, so that the power of the second oscillating circuit 303 can be transmitted to the first oscillating circuit 202.
- the circuit parts of the wireless charging receiving device 20 other than the receiving coil can be separately packaged into a chip and integrated on the PCB.
- the above-mentioned circuit part fabricated on the PCB in the wireless charging receiving device 20 may include the first communication circuit 201, the first controller 205, and the first rectifier circuit 203 as shown in FIG. 2b.
- wireless communication can be established between the wireless charging sending device 30 and the wireless charging receiving device 20.
- the wireless charging sending device 30 The second communication circuit 301 may be included.
- the communication between the first communication circuit 201 and the second communication circuit 301 can be connected through Bluetooth (bluetooth), wireless broadband (wireless-fidelity, WiFi), Zigbee protocol (Zigbee), radio frequency identification (RFID), remote Long range (Lora) wireless technology and near field communication (NFC) technology realize wireless connection, so that wireless communication can be established between the wireless charging sending device 30 and the wireless charging receiving device 20.
- control signals or charging data can be transmitted between the first communication circuit 201 and the second communication circuit 301.
- the charging data can be used to indicate the charging type.
- the charging data may be a charging protocol, such as the wireless charging standard Qi introduced by the Wireless Power Consortium (WPC), such as the BPP (basic power profile) protocol, or the EPP (extended power profile) protocol, etc.
- WPC Wireless Power Consortium
- BPP basic power profile
- EPP extended power profile
- the first communication circuit 201 is coupled to the first controller 205.
- the first controller 205 may identify the charging protocol sent by the second communication circuit 301 to the first communication circuit 201 to determine the charging type of the electronic device 01.
- the charging type may be the first charging type (for example, applicable (Low-power charging for slow charging) or, the above-mentioned charging type may be the second charging type (for example, high-power charging suitable for fast charging).
- the first controller 205 is coupled to the first rectifier circuit 203.
- the first rectifier circuit 203 in the embodiment of the present application may have two working modes, namely a half-bridge mode and a full-bridge mode.
- the first controller 205 recognizes that the charging type is the first charging type according to the above charging data, it can output the first rectification control signal to control the first rectification circuit 203 to operate in the half-bridge mode.
- the first rectifier circuit 203 in the half-bridge mode can retain (or remove) the positive half-cycle waveform of the received alternating current waveform, and remove (or retain) the negative half-cycle waveform to generate direct current.
- the first controller 205 when the first controller 205 recognizes that the charging type is the second charging type according to the above charging data, it can output a second rectification control signal to control the first rectification circuit 203 to operate in the full bridge mode.
- the first rectifier circuit 203 in the full-bridge mode can convert the positive half cycle and negative half cycle waveforms of the received alternating current waveform into the same polarity to generate direct current.
- the first rectifier circuit 203 is also coupled to the first receiving coil 211.
- the first rectifier circuit 203 works in any of the above-mentioned modes, and can rectify the first induced voltage output by the first receiving coil 211 to generate a DC power supply voltage Vrect.
- the power supply voltage Vrect is used to power the battery 50.
- the power supply voltage Vrect when the voltage value of the power supply voltage Vrect is the same as or approximately the same as the voltage value of the charging voltage (for example, 3.7V) of the battery 50, the power supply voltage Vrect can be directly compared to that shown in FIG. 2b. The battery 50 is charged. At this time, when the supply voltage Vrect is applied to the battery 50, the current output by the first rectifier circuit 203 can charge the battery 50.
- the above-mentioned wireless charging receiving device 20 further includes at least one-stage voltage conversion circuit 206 coupled to the first rectifier circuit 203.
- the voltage conversion circuit 206 can be arranged on the PCB (as shown in FIG. 1a) in the electronic device 01.
- the voltage conversion circuit 206 can convert the supply voltage Vrect (for example, step-down processing), and make the converted voltage (for example, 3.7V) supply power to the battery 50.
- the current output by the first rectifier circuit 203 can charge the battery 50.
- the supply voltage Vrect used to supply power to the battery 50 means that the supply voltage Vrect can directly supply power to the battery 50 without causing damage to the battery 50.
- the power supply voltage Vrect may be converted by at least one level of voltage conversion circuit 206 before supplying power to the battery 50.
- the aforementioned voltage conversion circuit 206 includes a DC/DC conversion circuit.
- the aforementioned DC/DC conversion circuit may be a Buck circuit or a switched capacitor (SC) circuit.
- SC switched capacitor
- the input/output voltage ratio of the Buck circuit can be flexibly adjusted, for example, the input/output voltage ratio can be set to a decimal.
- 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 charging power may be increased.
- the wireless charging and sending device 30 supports the second charging type (for example, high-power charging suitable for fast charging)
- the second communication circuit 301 can send a charging that matches the high-power charging to the first communication circuit 201. protocol.
- the first controller 205 may send a first voltage regulation instruction to the first communication circuit 201.
- the first voltage regulation command is used to instruct to increase the output voltage of the second oscillation circuit 303.
- the wireless charging and sending device 30 further includes a second controller 304 coupled to the second communication circuit 301.
- the second controller 304 may be coupled with the DC/AC 302 and the adapter 40.
- the first voltage regulation control signal is used to regulate the output voltage of the adapter 40 to achieve the purpose of increasing the output voltage of the adapter 40.
- the DC/AC 302 converts the direct current output by the adapter 40 into alternating current and transmits it to the second oscillating circuit 303, which can cause the transmitting coil 311 in the second oscillating circuit 303 to generate high-frequency alternating current and emit an alternating magnetic field. Therefore, when the DC voltage output by the DC/AC 302 increases, the high-frequency AC power generated on the transmitting coil 311 will also increase, so as to achieve the purpose of increasing the output voltage of the second oscillation circuit 303.
- the wireless charging transmitting device 30 further includes a voltage regulating circuit 305 coupled with the DC/AC 302 and the adapter 40.
- the voltage regulating circuit 305 can regulate the voltage output from the adapter 40 to the DC/AC 302.
- the second controller 304 receives the first voltage regulation instruction output by the second communication circuit 301, it generates a first voltage regulation control signal.
- the first voltage regulation control signal is used to increase the output voltage of the voltage regulation circuit 305. In this way, the DC voltage output by the DC/AC 302 will also increase, so as to achieve the purpose of increasing the output voltage of the second oscillation circuit 303.
- the output voltage of the voltage conversion circuit 206 is the third voltage (for example, 3.7V) of the battery 50. Therefore, when the output voltage of the second oscillating circuit 303 increases, the voltage difference between the input voltage and the output voltage of the wireless charging receiving device 20 will increase. In this case, in order to reduce the heat generation of the wireless charging receiving device 20, the structure of the wireless charging receiving device 20 provided in the embodiment of the present application will be described in detail below.
- the first oscillating circuit 202 in the wireless charging receiving device 20 may include the above-mentioned first receiving coil 211.
- a voltage converter can be formed between the first receiving coil 211 and the transmitting coil 311.
- the input to output voltage ratio U/U1 of the voltage converter can be equal to the ratio of the square root of the inductance L of the transmitting coil 311 to the square root of the inductance L1 of the first receiving coil 211, as shown in formula (1).
- the inductance of the first receiving coil 211 can be set to adjust the input/output voltage ratio U of the voltage converter composed of the transmitting coil 311 and the first receiving coil 211.
- the inductance of the first receiving coil 211 can be made smaller than the inductance of the transmitting coil 311 in the second oscillating circuit 303.
- n is a positive integer.
- the first rectifier circuit 203 is coupled to the first receiving coil 211, when the output voltage of the first receiving coil 211 is reduced, the input voltage of the first rectifier circuit 203 can be used, which is beneficial to realize Protection of the first rectifier circuit 203.
- the input voltage of the transmitting coil 311 will increase, for example, from 5V to 10V during low-power charging.
- the output voltage of the first receiving coil 211 will be reduced to 5V.
- the solution of the present application can effectively reduce The input voltage of the voltage conversion circuit 206.
- the voltage output from the voltage conversion circuit 206 to the battery 50 is used to charge the battery 50, its value is fixed, for example, 3.7V. Therefore, when the voltage is fixed according to the voltage at the output terminal of the conversion circuit 206, by reducing the voltage at the input terminal of the voltage conversion circuit 206, the voltage difference between the input terminal and the output terminal of the voltage conversion circuit 206 can be reduced. Therefore, the heat generated by the voltage conversion circuit 206 during the voltage conversion process and the losses in the voltage conversion process caused by the heat can be reduced, so as to achieve the purpose of improving the voltage conversion efficiency of the voltage conversion circuit 206, which is beneficial to improve the high-power power supply. s efficiency.
- the first controller 205 can identify the charging protocol received by the first communication circuit 201. Therefore, in order to enable the wireless charging receiving device 20 to be activated, it is necessary to supply power to the first controller 205.
- the first controller 205 may be coupled to the output terminal of the first rectifier circuit 203. In this way, when there is a voltage output at the output terminal of the first rectifier circuit 203, the voltage can supply power to the first controller 205, so that the first controller 205 can output the above-mentioned first rectification control to the first rectifier circuit 203. Signal or second rectification control signal.
- the inductance of the first receiving coil 211 is smaller than the inductance of the transmitting coil 311 in the second oscillation circuit 303. Moreover, when the voltage output by the first receiving coil 211 is small, the output voltage after being rectified by the first rectifier circuit 203 is not enough to start the first controller 205, resulting in the failure of wireless charging.
- the first oscillation circuit 202 of the wireless charging receiving device 20 provided by the embodiment of the present application further includes a second receiving coil 212 as shown in FIG. 3a and is coupled to the second receiving coil 212 and the first controller 205. Connected to the starting circuit 204.
- the startup circuit 204 can be arranged on the PCB (as shown in FIG. 1b) in the electronic device 01.
- the second receiving coil 212 can receive the alternating magnetic field emitted by the transmitting coil 311 and output the second induced voltage. Therefore, the transmitting coil 311 and the second receiving coil 212 can also form another voltage converter.
- the starting circuit 204 can convert the second induced voltage output by the second receiving coil 212 into a first DC voltage Vc.
- the first voltage Vc may be greater than or equal to the lowest operating voltage of the first controller 205, that is, the voltage in the (under voltage lock out, UVLO) state. In this case, the first voltage Vc can supply power to the first controller 205, so that the first controller 205 outputs the first rectification control signal or the second rectification control signal to the first rectification circuit 203.
- the first rectifier circuit 203 working in the half-bridge mode under the control of the first rectification control signal, or the first rectifier circuit 203 working in the full-bridge mode under the control of the second rectification control signal can output the first receiving coil 211 The voltage is converted into the supply voltage Vrect.
- the second The inductance of the receiving coil 212 may be greater than the inductance of the first receiving coil 211.
- the voltage input by the sending coil 311 is a fixed value. Therefore, when the alignment position of the second receiving coil 212 and the transmitting coil 311 in the base 02 has a large deviation, the second induced voltage output by the second receiving coil 212 is smaller. Therefore, when the position deviation between the second receiving coil 212 and the transmitting coil 311 reaches a preset maximum value, for example 10 mm, it can still be ensured that the second induced voltage output by the second receiving coil 212 is driven after being converted by the start circuit 204
- the first controller 205 outputs the first rectification control signal or the second rectification control signal.
- the inductance of the second receiving coil 212 may be 4 times the inductance of the first receiving coil 211.
- the inductance of the second receiving coil 212 may be greater than the inductance of the transmitting coil 311, may also be smaller than the inductance of the transmitting coil 311, or may be the same or approximately the same as the inductance of the transmitting coil 311. This application does not limit this. As long as the voltage converter formed by the transmitting coil 311 and the second receiving coil 212 can be ensured, the second induced voltage output by the second receiving coil 212 can be enough to drive the first controller 205 to output the first The rectification control signal or the second rectification control signal is sufficient.
- the inductances of the second receiving coil 212 and the transmitting coil 311 may be the same. At this time, the gain of the voltage converter formed by the second receiving coil 212 and the transmitting coil 311 may be 1:1.
- the startup circuit 204 may include a second rectifier circuit 214 and a second voltage stabilizing circuit 224.
- the second voltage stabilizing circuit 224 may be a low dropout regulator (LDO).
- the second rectifier circuit 214 is coupled to the second receiving coil 212 and the second voltage stabilizing circuit 224.
- the second voltage stabilizing circuit 224 is also coupled to the first controller 205 and the ground terminal GND. That is, as shown in FIG. 3b, the output terminals of the second voltage stabilizing circuit 224, the first controller 205, and the first rectifier circuit 203 are all coupled to the node Q.
- the second rectifying circuit 214 can rectify the alternating current output from the second receiving coil 212 to generate direct current.
- the second voltage stabilizing circuit 224 can output the first voltage Vc to the aforementioned node Q.
- the first voltage Vc supplies power to the first controller 205.
- the first controller 205 is also coupled to the output terminal of the first rectifier circuit 203.
- the first controller 205 outputs the first rectification control signal or the second rectification control signal to the first rectification circuit 203, so that the first rectification circuit 203 outputs the supply voltage Vrect, when the supply voltage Vrect is greater than the second regulated voltage
- the output terminal of the second stabilization circuit 224 can be in the disconnected state, so that the startup circuit 204 can be cut off, so that the startup circuit 204 stops supplying power to the first controller 205 .
- the first controller 205 since the first controller 205 is coupled to the output terminal of the first rectifier circuit 203, the first rectifier circuit 203 can output the supply voltage Vrect to the node Q.
- the power supply voltage Vrect can supply power to the first controller 205.
- the preset voltage stabilization voltage V1 of the second voltage stabilization circuit 224 can be set according to the parameters of the first controller 205, such as the aforementioned UVLO voltage, before the electronic device 01 leaves the factory. It can be seen from the above that the first voltage Vc output by the startup circuit 204 needs to be greater than or equal to the UVLO voltage, so the preset regulated voltage V1 can be greater than the first voltage Vc, so that the output power supply voltage Vrect of the first rectifier circuit 203 is greater than the second stable voltage Vc.
- the output terminal of the second stabilizing circuit 224 may be in a disconnected state, that is, the output terminal of the second stabilizing circuit 224 is disconnected from the node Q.
- the second voltage stabilizing circuit 224 when the output terminal of the second voltage stabilizing circuit 224 is coupled to the node Q, the second voltage stabilizing circuit 224 is used to supply power to the node Q.
- the first rectifier circuit 203 supplies power to the node Q. Therefore, at the same time, the node Q has only one voltage, which can supply power to the first controller 205.
- the output terminal of the second voltage stabilizing circuit 224 in the startup circuit 204 is coupled to the input terminal of the first controller 205. In this way, during the working process of the wireless charging receiving device 20, the starting circuit 204 will always provide the first voltage Vc to the first controller 205.
- the second receiving coil 212 will always receive the alternating magnetic field emitted by the transmitting coil 311 and generate a second induced voltage.
- the second receiving coil 212 generates heat during the process of outputting the second induced voltage, during the wireless charging process, the heat generated by the coil has a small influence on the charging power consumption and can be ignored.
- the voltage converter formed by the transmitting coil 311 and the second receiving coil 212 can make the second induced voltage output by the second receiving coil 212 be converted by the startup circuit 204 and drive the first controller 205 to output the first rectification control. Signal or second rectification control signal.
- the voltage converter formed by the transmitting coil 311 and the first receiving coil 211 can reduce the output voltage of the first receiving coil 211.
- the inductance of the first receiving coil 211 in the first oscillating circuit 202 is smaller than the inductance of the second receiving coil 212.
- the first receiving coil 211 and the second receiving coil 212 can be wound by using the same metal axis. The difference is that the number of turns of the first receiving coil 211 can be smaller than that of the second receiving coil 211.
- the number of turns of the coil 212 is such that the inductance of the first receiving coil 211 can be smaller than the inductance of the second receiving coil 212.
- the first receiving coil 211 may be made of thicker metal wires, and the second receiving coil 212 may be made of thinner metal wires.
- the number of winding turns of the first receiving coil 211 may be smaller than the number of winding turns of the second receiving coil 212.
- the inductance of the first receiving coil 211 is half of the inductance of the second receiving coil 212
- the number of turns of the first receiving coil 211 may be or approximately half of the number of turns of the second receiving coil 212.
- the remaining winding methods of the first receiving coil 211 and the second receiving coil 212 will not be repeated here, as long as the inductance of the first receiving coil 211 can be made smaller than the inductance of the second receiving coil 212.
- the first receiving coil 211 may be disposed inside the second receiving coil 212.
- the first end 2 and the second end 3 of the first receiving coil 211 are located between the first end 1 and the second end 4 of the second receiving coil 212.
- the second receiving coil 212 is disposed inside the first receiving coil 211.
- the first end 2 and the second end 3 of the first receiving coil 211 are located between the first end 1 and the second end 4 of the second receiving coil 212.
- a part of the second receiving coil 212 is disposed inside the first receiving coil 211, and the other part is disposed outside the first receiving coil 211.
- the first end 2 and the second end 3 of the first receiving coil 211 are located between the first end 1 and the second end 4 of the second receiving coil 212.
- the foregoing description is based on an example in which the second receiving coil 212 and the starting circuit 204 are provided in the wireless charging receiving device 20 to drive the first controller 205.
- the voltage output by the first rectifier circuit 203 is sufficient to activate the first controller 205.
- the wireless charging receiving device 20 does not need to be provided with the second receiving coil 212 and the starting circuit 204 described above.
- the structure of the wireless charging receiving device 20 is shown in FIG. 6a.
- the voltage output by the first rectifier circuit 203 can directly drive the first controller 205, so that the first controller 205 outputs the first rectification control to the first rectifier circuit 203. Signal or second rectification control signal.
- the wireless charging receiving device further includes a first voltage stabilizing circuit 225.
- the first voltage stabilizing circuit 225 may be arranged on the PCB of the above-mentioned electronic device 01.
- the first voltage stabilizing circuit 225 may be coupled to both ends of the battery 50 and the first controller 205.
- the first voltage stabilizing circuit 225 is used to transmit the voltage of the battery 50 to the first controller 205 to supply power to the first controller 205. In this way, when the remaining power in the battery 50 is sufficient to drive the first controller 205, the remaining power in the battery 50 can be used to drive the first controller 205.
- the first stabilized circuit 225 is used to disconnect the battery 50 and the first controller 205. That is, the output terminal of the first voltage stabilizing circuit 225 is disconnected from the node Q.
- the first controller 205 since the first controller 205 is coupled to the output terminal of the first rectifier circuit 203, the first rectifier circuit 203 can output the supply voltage Vrect to the node Q.
- the supply voltage Vrect can supply power to the first controller 205, so that the first controller 205 outputs the first rectification control signal or the second rectification control signal to the first rectification circuit 203.
- the setting method of the preset voltage stabilizing voltage V2 of the first voltage stabilizing circuit 225 is the same as the setting method of the preset voltage stabilizing voltage V1 of the second voltage stabilizing circuit 224, and will not be repeated here.
- the wireless charging receiving device 20 is provided with the second receiving coil 212 and the activation circuit 204 to drive the first controller 205 as an example.
- the structures of the first rectifier circuit 203 and the second rectifier circuit 214 will be described in detail with examples.
- the first rectifier circuit 203 includes a first bridge arm and a second bridge arm connected in parallel.
- the first bridge arm includes a first switch component 61 and a second switch component 62 connected in series.
- the second bridge arm includes a third switch component 63 and a fourth switch component 64 connected in series.
- Any one of the aforementioned first switch component 61, second switch component 62, third switch component 63, and fourth switch component 64 includes a diode and a switch tube connected in parallel with the diode.
- the first switch component 61 includes a switch tube Sa
- the second switch component 62 includes a switch tube Sb
- the third switch component 63 includes a switch tube Sa1
- the fourth switch component 64 includes a switch tube Sb1.
- the first terminal 2 of the first receiving coil 211 is coupled between the first switch component 61 and the second switch component 62. That is, the first terminal 2 of the first receiving coil 211 is coupled between the anode (anode, a) of the diode in the first switch component 61 and the cathode (cathode, c) of the diode in the second switch component 62.
- the first oscillation circuit 202 further includes a third resonant capacitor C RX3 .
- the first end of the third resonant capacitor C RX3 is coupled to the first end 2 of the first receiving coil 211, and the second end of the third resonant capacitor C RX3 is coupled to one of the first switch component 61 and the second switch component 62 Therefore, the first terminal 2 of the first receiving coil 211 is coupled between the first switch component 61 and the second switch component 62 through the third resonant capacitor C RX3.
- the second end 3 of the first receiving coil 211 is coupled between the third switch assembly 63 and the fourth switch assembly 64. That is, the second end 3 of the first receiving coil 211 is coupled between the anode a of the diode in the third switch assembly 63 and the cathode c of the diode in the fourth switch assembly 64.
- the control terminal (ie The control terminal of the switch tube Sa), the control terminal of the second switch component 62 (that is, the control terminal of the switch tube Sb), the control terminal of the third switch component 63 (that is, the control terminal of the switch tube Sb1), and the control terminal of the fourth switch component 64
- the control terminal (ie, the control terminal of the switch tube Sa1) is coupled to the above-mentioned first controller 205.
- the first controller 205 can control the switching tube Sa, the switching tube Sb, the switching tube Sb1, and the switching tube Sa1 to turn on or off.
- the above-mentioned first rectifier circuit 203 further includes a first filter capacitor C1.
- the first terminal of the first filter capacitor C1 is coupled to the cathode c of the diode in the first switch component 61, and the second terminal of the first filter capacitor C1 is coupled to the ground terminal GND.
- the structure of the second rectifier circuit 214 of the startup circuit 204 may include a first diode D1 and a second diode D2 connected in series, and a third diode D3 connected in series. And the fourth diode D4.
- the first diode D1 and the cathode c of the third diode D3 are coupled to each other, and are used as the output terminal of the second rectifier circuit 214 to be coupled to the second voltage stabilizing circuit 224.
- the anodes a of the second diode D2 and the fourth diode D4 are both coupled to the ground terminal GND.
- the first oscillating circuit 202 also includes a first resonant capacitor C RX1 as shown in FIG. 7.
- the first end of the first resonant capacitor C RX1 is coupled to the first end 1 of the second receiving coil 212, and the second end of the first resonant capacitor C RX1 is connected to the anode a and the second diode of the first diode D2.
- the cathode c of the tube D2 is coupled.
- the second terminal 4 of the second receiving coil 212 is coupled to the anode a of the third diode D2 and the cathode c of the fourth diode D4.
- the aforementioned second rectifier circuit 214 may further include a second filter capacitor C2.
- the first terminal of the second filter capacitor C2 is coupled to the cathode c of the third diode D3, and the second terminal of the second filter capacitor C2 is coupled to the ground terminal GND.
- the control method of the wireless charging system having the wireless charging transmitting device 30 and the wireless charging receiving device 20 as shown in FIG. 7 will be described in detail below.
- the control method includes S101 to S108 as shown in FIG. 8.
- the second communication circuit 301 in the wireless charging transmitting device 30 sends a start signal (which may be referred to as a Ping signal), and the wireless charging receiving device 20 is started.
- the wireless charging receiving device 20 is powered on, and the first rectifier circuit 203 operates in the half-bridge mode.
- the wireless charging receiving device 20 After the first communication circuit 201 in the wireless charging receiving device 20 receives the Ping signal, the wireless charging receiving device 20 powers on some of its internal components, such as the aforementioned startup circuit 204, according to a set power-on sequence.
- the starting circuit 204 can convert the AC power output by the second receiving coil 212 into a DC first voltage Vc.
- the first controller 205 in the wireless charging receiving device 20 can output a first rectification control signal to control the first rectification circuit 203 to operate in the half-bridge mode.
- the second rectifier circuit 214 in the startup circuit 204 includes the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 as shown in FIG. 7,
- the second rectifier circuit 214 may be a full bridge rectifier circuit. Based on this, when the polarity of the second induced voltage on the second receiving coil 212 (the positive pole is represented by +, the negative pole is represented by -) as shown in FIG. 9a, the induced voltage on the second receiving coil 212 passes through the first diode The loop formed by D1 and the fourth diode D4 generates the first voltage Vc and provides it to the first controller 205.
- the induced voltage on the second receiving coil 212 is formed by the second diode D2 and the third diode D3.
- the loop generates the first voltage Vc and provides it to the first controller 205.
- the input/output voltage ratio of the full-bridge second rectifier circuit 214 is 1:1.
- the inductance of the second receiving coil 212 may be increased, for example, the inductance of the second receiving coil 212 is equal to the inductance of the transmitting coil 311. In this case, when the component space of the electronic device 01 is sufficient, the number of turns of the metal wiring used to wind the second receiving coil 212 can be increased.
- the second voltage stabilizing circuit 224 may be replaced with a DC/DC converter with boost and step-down functions. In this way, the voltage output by the second rectifier circuit 214 can be boosted through the DC/DC converter, so that the first voltage Vc output by the starting circuit 204 can meet the requirement for starting the first controller 205.
- the input voltage of the transmitting coil 311 will increase, so if the positions of the second receiving coil 212 and the transmitting coil 311 are not aligned and there is a large deviation , The second induced voltage generated by the second receiving coil 212 will also increase, so that the first voltage Vc generated by the starting circuit 204 according to the induced voltage generated by the second receiving coil 212 will be greater than the maximum operating voltage of the first controller 205.
- the above-mentioned DC/DC converter can also perform a step-down process on the voltage output by the second rectifier circuit 214, so that the The first voltage Vc is less than the highest operating voltage of the first controller 205.
- the startup circuit 204 outputs the first voltage Vc meeting the design requirements to the first controller 205
- the first controller 205 is in the working state and outputs the first rectification control signal to the first rectification circuit 203, To control the first rectifier circuit 203 to work in the half-bridge mode and output the supply voltage Vrect.
- the wireless charging system provided in the embodiment of the present application may default to support the first charging type, for example, low-power charging suitable for slow charging, and the voltage provided by the transmitting coil 311 is, for example, 5V.
- the gain of the voltage converter formed by the transmitting coil 311 and the first receiving coil 211 may be 2:1, so the voltage output by the first receiving coil 211 may be 2.5V.
- the voltage output by the first receiving coil 211 is too small to meet the charging requirement of the battery 50 (for example, the third voltage across the battery 50 may be 3.7V). Therefore, when the first rectifier circuit 203 rectifies the alternating current output by the first receiving coil 211, it also needs to boost the voltage output by the first receiving coil 211.
- the output first rectification control signal can control the first rectification circuit 203 shown in FIG. 7 to operate in the half-bridge mode .
- the above-mentioned first rectification control signal may be configured in advance in the first controller 205. In order to make the first rectifier circuit 203 work in the half-bridge mode.
- the above-mentioned pre-configured first rectification control signals (Sa, Sb, Sb1, Sa1) output by the first controller 205 may be as shown in Fig. 10a.
- the current received by the first rectifier circuit 203 is relatively small, and at this time the first rectifier circuit 203 is in the half-bridge diode rectification stage P1 as shown in FIG. 10a.
- the signal received by the control end of the first switching tube Sa is high, the first switching tube Sa is in the on state, and the signals received by the control ends of the remaining switching tubes are low, so the remaining switching tubes are in the off state (The switch tube is in the off state).
- the voltage Vin provided by the transmitting coil 311 gradually increases from 0V.
- the supply voltage Vrect output by the first rectifier circuit 203 also gradually increases from 0V.
- the first rectifier circuit 203 is in the half-bridge synchronous rectification phase P2 as shown in FIG. 10a.
- the signal received by the control terminal of the first switch tube Sa is at a high level (indicated by "1").
- the signals received by the control ends of the third switching tube Sb1 and the fourth switching tube Sa1 are alternately high, so that the first switching tube Sa can be turned on all the time, and the third switching tube Sb1 and the fourth switching tube Sa1 are turned on alternately .
- the signal received by the control terminal of the second switch tube Sb is low level (indicated by "0"), and the second switch tube Sb is always in an off state.
- the first rectifier circuit 203 when the polarity of the first induced voltage output by the first receiving coil 211 according to the alternating magnetic field generated by the transmitting coil 311 (positive pole is represented by +, negative pole is represented by -) as shown in FIG. 11a, in the half-bridge mode
- the first switching tube Sa and the third switching tube Sb1 when the signals received by the control terminals of the first switching tube Sa and the third switching tube Sb1 are at a high level, the first switching tube Sa and the third switching tube Sb1 are turned on, and the remaining switching tubes, such as The second switching tube Sb and the fourth switching tube Sa1 are in an off state (indicated by dotted lines in FIG. 11a).
- the current on the first rectifier circuit 203 charges the third resonant capacitor C RX3 to 0.5 times the supply voltage Vrect.
- the third resonant capacitor C RX3 described above has a DC bias of 0.5Vrect voltage.
- the first receiving coil 211 outputs the polarity of the first induced voltage according to the alternating magnetic field after the change in the direction of the magnetic field (the positive pole is represented by +, and the negative pole is represented by -Representation) As shown in Fig. 11b, the polarity of the induced voltage in Fig. 11a is opposite.
- the first rectifier circuit 203 in the half-bridge mode when the signals received by the control ends of the first switching tube Sa and the fourth switching tube Sa1 are high, the first switching tube Sa and the fourth switching tube Sa1 conduct through.
- the other switching tubes for example, the second switching tube Sb and the third switching tube Sb1 are turned off (shown by a dashed line in FIG. 11b).
- the third resonance capacitor C RX3 (which has 0.5 times the supply voltage Vrect) and the first receiving coil 211 (which has 0.5 times the supply voltage Vrect) are connected in series, the voltage on the third resonance capacitor C RX3 and the first receiving coil 211 The voltage on the coil 211 can be superimposed on the output filter capacitor C3 (as shown in FIG. 7, arranged at both ends of the battery 50) and the battery 50.
- the power supply voltage Vrect output by the first rectification circuit 203 is multiplied, so that the power supply voltage Vrect output by the first rectification circuit 203 is greater than the voltage received in the first rectification circuit 203.
- the above is based on the control terminal of the first switch tube Sa.
- the received signal is at a high level (indicated by “1”), and the control terminal of the second switch tube Sb receives The signal is low level (indicated by “0”) as an example, it is described that the first rectifier circuit 203 works in the half-bridge synchronous rectification phase P2.
- the signal received by the control terminal of the first switching tube Sa may be low level (indicated by "0"), and the first switching tube Sa is always in the off state .
- the signal received by the control end of the second switch tube Sb may be at a high level (indicated by "1"), and the second switch tube Sb is always in a conducting state.
- the process of the first rectifier circuit 203 working in the half-bridge synchronous rectification phase P2 as shown in FIG. 10b can be obtained in the same way, and will not be repeated here.
- the first rectifier circuit 203 works in the half-bridge synchronous rectification phase P2, and the ratio of its input and output voltages can be or be approximately 1:2.
- the greater the load of the first rectifier circuit 203, the output voltage of the first rectifier circuit 203 working in the half-bridge synchronous rectification phase P2 is slightly smaller than twice the input voltage.
- the ratio of the input and output voltage of the first rectifier circuit 203 is 1:2 for illustration.
- the voltage Vin provided by the transmitting coil 311 is, for example, 5V (the voltage at point A1 in FIG. 10b). Since the gain of the voltage converter formed by the transmitting coil 311 and the first receiving coil 211 can be 2:1, the voltage output by the first receiving coil 211 is 2.5V.
- the supply voltage Vrect output by the first rectifier circuit 203 is about 5V (the voltage at point B1 in FIG. 10b).
- the ratio of the voltage Vin provided by the transmitting coil 311 to the supply voltage Vrect output by the first rectifier circuit 203 (that is, the input voltage of the voltage conversion circuit 206) is 1:1.
- the voltage conversion circuit 206 can convert the above-mentioned power supply voltage Vrect (5V), and supply the battery 50 with the converted voltage (for example, 3.7V).
- the wireless charging receiving device 20 may further include a switch tube Sc as shown in FIG. 7.
- the switch tube Sc is coupled between the first rectifier circuit 203 and the voltage conversion circuit 206, and the control terminal of the switch tube Sc can be coupled with the first controller 205.
- the first controller 205 coupled to the output terminal of the first rectifier circuit 203 can collect the voltage output by the first rectifier circuit 203.
- the electronic device 01 just starts to charge, the voltage output by the first rectifier circuit 203 is not stable enough. At this time, the first controller 205 can determine that the voltage output by the first rectifier circuit 203 cannot meet the charging requirements required by the battery 50.
- the first controller 205 can control the control terminal of the switching tube Sc so that the switching tube Sc is in an off state. This prevents the unstable voltage output by the first rectifier circuit 203 from being converted by the voltage conversion circuit 206 to charge the battery 50 and affect the performance of the battery 50.
- the first controller 205 can control the control terminal of the switch tube Sc to make the switch tube Sc in a conducting state, thereby outputting the power supply from the first rectifier circuit 203
- the voltage Vrect can be transmitted to the voltage conversion circuit 206 through the control switch Sc.
- the wireless charging system provided by the embodiment of the present application may also support a second charging type, for example, a high-power charging suitable for fast charging, and the voltage provided by the transmitting coil 311 is, for example, 20V.
- a second charging type for example, a high-power charging suitable for fast charging
- the voltage provided by the transmitting coil 311 is, for example, 20V.
- a communication connection can be established between the second communication circuit 301 and the first communication circuit 201.
- the second communication circuit 301 can send the aforementioned charging protocol to the first communication circuit 201.
- the first communication circuit 201 transmits the received charging protocol to the first controller 205.
- the first controller 205 recognizes the above-mentioned charging protocol, and when it recognizes that the charging type is the above-mentioned first charging type, executes the above-mentioned step S103.
- the first controller 205 recognizes that the charging type is the above-mentioned second charging type, the following step S106 is executed.
- S106 The second controller generates a first voltage regulation control signal.
- the first controller 205 may send a first voltage regulation instruction to the first communication circuit 201.
- the first voltage regulation instruction is used to instruct to increase the voltage provided by the sending coil 311.
- the second communication circuit 301 (as shown in FIG. 2a) can receive the above-mentioned first voltage regulation command and send it to the second controller 304.
- the second controller 304 generates the first voltage adjustment control signal according to the first voltage adjustment instruction, so that the voltage provided by the transmitting coil 311 can be increased from the previous 5V to 20V.
- the first rectifier circuit 203 works in a full bridge mode.
- the gain of the voltage converter formed by the transmitting coil 311 and the first receiving coil 211 can be 2:1, so the voltage output by the first receiving coil 211 can be 5V.
- the first controller 205 recognizes that the charging type is the above-mentioned second charging type, the first controller 205 inputs the second rectification control signal to the first rectification circuit 203 shown in FIG.
- the rectifier circuit 203 works in a full bridge mode.
- the first rectifier circuit 203 when the first rectifier circuit 203 has just switched from the half-bridge mode to the full-bridge mode, the first rectifier circuit 203 will first enter the full-bridge diode rectification stage P3 as shown in FIG. 10b.
- the signals received by the control ends of all the switching tubes (Sa, Sb, Sb1, Sa1) in the first rectification circuit 203 are all low level (0), so all the switching tubes are in Deadline.
- the voltage Vin provided by the transmitting coil 311 gradually increases from 5V to about 20V.
- the voltage at point A2 in Figure 10b is 18V.
- the following is for convenience of description Take an example that the voltage Vin provided by the transmitting coil 311 is 20V.
- the supply voltage Vrect output by the first rectifier circuit 203 will drop during the full-bridge diode rectification phase P3.
- the second rectification control signal (Sa, Sb, Sb1, Sa1) output by the first controller 205 may be as shown in FIG. 12.
- the signals received by the control terminals of the first switching tube Sa and the fourth switching tube Sa1 are the same, and the signals received by the control terminals of the second switching tube Sb and the third switching tube Sb1 are the same.
- the signals received by the control terminals of the first switching tube Sa and the second switching tube Sb are opposite.
- the first switching tube Sa and the fourth switching tube Sa1 are the first strobe group
- the second switching tube Sb and the third switching tube Sb1 are the second strobe group.
- the above-mentioned first strobe group and second strobe group in the first rectifier circuit 203 in the full bridge mode are turned on alternately.
- the first gating group (the first switching tube Sa and the fourth switching tube Sa1) is turned on
- the second gating group (the second switching tube Sb and the third switching tube Sb1) is turned off.
- the first strobe group (the first switching tube Sa and the fourth switching tube Sa1) is turned off, and the second strobe group (the second switching tube Sb and the third switching tube Sb1) is turned on.
- the same principle can be obtained from the working principle of the full-bridge second rectifier circuit 214.
- the input-to-output voltage ratio of the first rectifier circuit 203 is 1:1.
- the wireless charging system adopts the second charging type, and the voltage Vin provided by the transmitting coil 311 is, for example, 20V, due to the voltage converter formed by the transmitting coil 311 and the first receiving coil 211
- the gain of can be 2:1, so the voltage output by the first receiving coil 211 is 10V, and the supply voltage Vrect output by the first rectifier circuit 203 is about 10V (the voltage at point B2 in FIG. 10b).
- the ratio of the voltage Vin provided by the transmitting coil 311 to the supply voltage Vrect output by the first rectifier circuit 203 (that is, the input voltage of the voltage conversion circuit 206) is 2:1.
- the voltage conversion circuit 206 can convert the above-mentioned supply voltage Vrect (10V), and charge the battery 50 with the converted voltage (for example, 3.7V). After the voltage is reduced by the voltage conversion circuit 206, since the charging power is high power, the current flowing into the battery 50 per unit time is increased, so that fast charging can be realized.
- the inductance of the first receiving coil 211 can be 1/n of the inductance of the transmitting coil 311.
- the inductance of the first receiving coil 211 can be the inductance of the transmitting coil 311
- the gain of the voltage converter formed by the transmitting coil 311 and the first receiving coil 211 is 2:1, and the voltage output from the first receiving coil 211 to the first rectifier circuit 203 is half of the input voltage of the transmitting coil 311 .
- the wireless charging system uses the first charging type (low power) or the second charging type (high power) to charge the electronic device 01
- the first receiving coil 211 output to the first rectifier circuit 203 can be reduced. inductive voltage.
- OVP overvoltage protection
- the first switching tube Sa, the second switching tube Sb, the third switching tube Sb1, and the fourth switching tube Sa1 in the first rectifier circuit 203 may be metal oxide semiconductors prepared by a low-voltage process. , MOS) field effect transistor composition. So as to achieve the purpose of reducing production costs.
- the voltage converter composed of the transmitting coil 311 and the first receiving coil 211 can reduce the output of the first receiving coil 211.
- An induced voltage therefore, the wireless charging receiving device 20 may only be provided with a first-level voltage conversion circuit 206 (for example, an SC circuit with a step-down ratio of 2:1). In this way, the number of cascades of the voltage conversion circuit 206 in the wireless charging receiving device 20 can be reduced, thereby reducing the problem of large power transmission efficiency loss due to the excessive number of cascades of the voltage conversion circuit 206.
- the efficiency of the voltage converter constituted by the transmitting coil 311 and the first receiving coil 211 is set to be constant.
- the coil loss is the same.
- Table 1 shows the specific values of the inductance, resistance, output voltage, coil current, and coil loss of the first receiving coil 211 in the above two voltage converters.
- the voltage converter formed by the transmitting coil 311 and the first receiving coil 211 When the inductance (L), resistance (R), output voltage (U) and coil current (I) of the transmitting coil 311 remain unchanged, the voltage converter formed by the transmitting coil 311 and the first receiving coil 211 When the gain is 2:1, it can be seen from the above that the inductance value of the first receiving coil 211 is (1/4)L.
- the efficiency of a voltage converter with a gain of 1:1 and a voltage converter with a gain of 2:1 formed by the transmitting coil 311 and the first receiving coil 211 can both be 97% .
- the conversion efficiency of the first rectifier circuit 203 may be 98%, and the conversion efficiency of the SC circuit with a step-down ratio of 2:1 is 97%.
- the efficiency of the voltage converter composed of the transmitting coil 311 and the first receiving coil 211 and the first rectifier circuit 203 remains unchanged, the smaller the number of cascades, the higher the output power of the wireless charging receiving device 20.
- the efficiency of the voltage converter composed of the transmitting coil 311 and the first receiving coil 211 and the first rectifier circuit 203 remains unchanged, and the number of cascades of the voltage conversion circuit 206 remains unchanged, the efficiency of the voltage conversion circuit 206 itself The higher the value, the higher the output power of the wireless charging receiving device 20.
- the size of the wireless charging receiving device 20 can be reduced, which is beneficial to reducing the component space of the wireless charging receiving device 20 in the electronic device 01.
- the first rectifying circuit 203 in the wireless charging receiving device 20 operates in the half-bridge mode, and the electronic device performs the first charging at this time.
- Type (low power) charging When a communication connection is established between the second communication circuit 301 and the first communication circuit 201, and the high-power charging protocol sent by the second communication circuit 301 is recognized by the first controller 205 to realize the communication handshake, the first rectifier circuit 203 can Working in the full-bridge mode, the wireless charging system uses the second charging type (high power) to charge the electronic device 01 at this time.
- the wireless charging system can be compatible with the first charging type (low power) and the second charging type (high power) at the same time.
- the electronic device 01 when the electronic device 01 performs high-power charging, it can also be switched to low-power charging as needed. For example, when the electronic device 01 is in the process of high-power charging, when the heat generated by the battery 50 is large, it can be switched from high-power charging to low-power charging. Alternatively, when the battery 50 is fully charged or is about to be fully charged, in order to reduce energy loss or adverse effects on the battery 50, it is possible to switch from high-power charging to low-power charging. Or, the display interface of the electronic device 01, such as a mobile phone, can set a charging mode selection icon for the charging mode, and the user can control the charging mode selection icon according to needs, thereby switching high-power charging to low-power charging.
- the display interface of the electronic device 01 such as a mobile phone
- the first controller 205 may send a second voltage regulation instruction to the first communication circuit 201.
- the second voltage regulation command is used to instruct to reduce the input voltage of the first receiving coil 211.
- the second communication circuit 301 in the wireless charging transmitter 30 can transmit the second voltage regulation command to the second controller 304.
- the second controller 304 receives the second voltage regulation instruction output by the second communication circuit 301, it generates a second voltage regulation control signal.
- the second voltage regulation control signal is used to reduce the output voltage of the adapter 40. At this time, the voltage provided by the transmitting coil 311 will also be reduced, for example, to 5V.
- the gain of the voltage converter formed by the transmitting coil 311 and the first receiving coil 211 can be 2:1, so the voltage output by the first receiving coil 211 can be 2.5V.
- the purpose of reducing the input voltage of the first receiving coil 211 is achieved.
- the wireless charging and sending device 30 when the wireless charging and sending device 30 further includes a voltage regulating circuit 305 coupled with the DC/AC 302 and the adapter 40, the second controller 304 receives the second output from the second communication circuit 301. After the voltage regulation command, a second voltage regulation control signal is generated. The second voltage regulation control signal is used to reduce the output voltage of the voltage regulation circuit 305 to achieve the purpose of reducing the input voltage of the first receiving coil 211.
- the first controller 205 will also output a first rectification control signal to the first rectification circuit 203 to control the first rectification circuit 203 to operate in the half-bridge synchronous rectification phase P2 (the second P2 phase) as shown in FIG. 10b.
- the first rectifier circuit 203 works in the half-bridge synchronous rectification phase P2
- the process of the aforementioned electronic device 01 performing low-power charging is the same as that described above, and will not be repeated here.
- the first rectifier circuit 203 when the first rectifier circuit 203 has just switched from the full-bridge mode to the half-bridge mode, it needs to go through the full-bridge diode rectification stage P3 as shown in FIG. 10b.
- the voltage Vin provided by the transmitting coil 311 will be reduced to about 5V (the voltage of the node A3 in FIG. 10b).
- the supply voltage Vrect output by the first rectifier circuit 203 will also be reduced to about 5V (the voltage of the node B3 in FIG. 10b).
- the working process of the first rectifier circuit 203 in the full-bridge diode rectification phase P3 is the same as described above, and will not be repeated here.
- the first rectifier circuit 203 when the battery 50 in the electronic device 01 is fully charged, if the electronic device 01 is still placed on the base 02, in order to reduce the heating of the electronic device, as shown in FIG. 10b, the first rectifier circuit 203 will enter the half-bridge diode In the rectification stage P1 (the second stage P1), at this time, although the voltage Vin provided by the transmitting coil 311 is still 5V, the supply voltage Vrect output by the first rectification circuit 203 will decrease, which will reduce the heating of the electronic device.
- the above is an illustration of the electronic device 01 being switched from high-power charging to low-power charging.
- the electronic device 01 can also switch from low-power charging to high-power charging according to needs, for example, the user controls the above-mentioned charging mode selection icon.
- the first controller 205 may send the above-mentioned first voltage regulation instruction to the first communication circuit 201, and the first controller 205 may also output a second rectification control signal to the first rectification circuit 203 to control the first rectification circuit 203 works in full bridge mode.
- the process of increasing the input voltage of the first receiving coil 211 through the above-mentioned first voltage regulation command and the process of the first rectifier circuit 203 operating in the full-bridge mode will not be repeated here.
- the first rectifier circuit 203 first enters the half-bridge diode rectification stage P1, and then enters the half-bridge synchronous rectification stage P2, so that the electronic device 01 is charged with low power.
- the second communication circuit 301 and the first communication circuit 201 successfully communicate and shake hands, that is, when the first controller 205 recognizes that the charging type is the above-mentioned second charging type, the first rectifier circuit 203 switches from the half-bridge mode to the full-bridge mode , So that the electronic device 01 performs high-power charging. Thereafter, the electronic device 01 can switch between high-power charging and low-power charging as needed.
- the first rectifier circuit 203 also switches between the full-bridge mode and the half-bridge mode accordingly.
- the first rectifier circuit 203 needs to go through the above-mentioned figure.
- the first rectifier circuit 203 enters the half-bridge diode rectification stage P1, so that the supply voltage Vrect output by the first rectifier circuit 203 is reduced, and the heating of the electronic device is reduced.
- the structure of the wireless charging receiving device 20 is shown in FIG. 14, and the difference from Example 1 is that the structure of the second rectifying circuit 214 in the starting circuit 204 (FIG. 4) is different.
- the setting method and control method of the remaining components in the charging receiving device 20 are the same as those described above, and will not be repeated here.
- the second rectifier circuit 214 includes a first diode D1, a second diode D2, and a second filter capacitor C2 connected in series.
- the cathode c of the first diode D1 serves as the output terminal of the second rectifier circuit 214 and is coupled to the second voltage stabilizing circuit 224, so that the output terminal of the second rectifier circuit 214 passes through the second voltage stabilizing circuit 224 It is coupled to the first controller 205.
- the first terminal of the second filter capacitor C2 is coupled to the cathode c of the first diode D1, and the second terminal of the second filter capacitor C2 is coupled to the ground terminal GND.
- the number of diodes in the second rectifier circuit 214 in this example is reduced, so that the number of electronic components in the second rectifier circuit 214 can be saved, and the circuit can be simplified. structure.
- first end of the first resonant capacitor C RX1 in the first oscillating circuit 202 is coupled to the first end of the second receiving coil 212, and the second end of the first resonant capacitor C RX1 is connected to the first diode D1.
- the anode a of the second diode D2 is coupled to the cathode c of the second diode D2.
- the second terminal of the second receiving coil 212 and the anode a of the second diode D2 are both coupled to the ground terminal GND.
- the aforementioned second rectifier circuit 214 is a half-bridge rectifier circuit, which only works in the half-bridge mode. Based on this, referring to the half-bridge mode of the first rectifier circuit 203, it can be known that the input-to-output voltage ratio of the second rectifier circuit 214 in the half-bridge mode can be 1:2. In this way, the output voltage of the second rectifier circuit 214 is greater than the input voltage of the second rectifier circuit 214. Therefore, the magnitude of the first voltage Vc output by the starting circuit 204 can be effectively increased, so that the first controller that receives the first voltage Vc can be in a working state.
- the second rectifier circuit 214 can increase the output voltage, there is no need to increase the inductance of the second receiving coil 212 to increase the voltage input to the second rectifier circuit 214. In this way, since the inductance of the second receiving coil 212 does not need to be increased, the number of turns of the metal trace in the second receiving coil 212 can be reduced, so as to reduce the amount of the second receiving coil 212 in the electronic device 01. The purpose of the part space.
- the second voltage stabilizing circuit 224 may be replaced with a DC/DC converter with boosting and step-down functions.
- the technical effects of the step-up and step-down DC/DC converter are the same as those described above, and will not be repeated here.
- the structure of the wireless charging receiving device 20 is shown in FIG. 15, and the difference from Example 1 is that the structure of the second rectifying circuit 214 in the starting circuit 204 (FIG. 4) is different.
- the setting method and control method of the remaining components in the charging receiving device 20 are the same as those described above, and will not be repeated here.
- the second rectifier circuit 214 includes a first diode D1, a second diode D2, and a second filter capacitor C2 connected in series.
- the cathode c of the first diode D1 serves as the output terminal of the second rectifier circuit 214 and is coupled to the second voltage stabilizing circuit 224 so that the output terminal of the second rectifier circuit 214 is connected to the second voltage stabilizing circuit 224 through the second voltage stabilizing circuit 224
- the first controller 205 is coupled.
- the first terminal of the second filter capacitor C2 is coupled to the cathode c of the first diode D1, and the second terminal of the second filter capacitor C2 is coupled to the ground terminal GND.
- the number of diodes in the second rectifier circuit 214 in this example is reduced, so that the number of electronic components in the second rectifier circuit 214 can be saved, and the circuit can be simplified. structure.
- the number of turns of the second receiving coil 212 can be reduced to achieve the purpose of reducing the space of components.
- the first oscillating circuit 202 also includes a first resonant capacitor C RX1 and a second resonant capacitor C RX2 connected in series.
- the cathode c of the first diode D1 is coupled to the first end of the first resonant capacitor C RX1.
- the anode a of the second diode D2 and the second end of the second resonant capacitor C RX2 are both coupled to the ground terminal GND.
- the first end of the second receiving coil 212 is coupled to the anode a of the first diode D1 and the cathode c of the second diode D2, and the second end of the second receiving coil 212 is coupled to the first resonance. Between the second end of the capacitor C RX1 and the first end of the second resonant capacitor C RX2.
- the aforementioned second rectifier circuit 214 is a half-bridge rectifier circuit, which can only work in a half-bridge mode.
- the working process and technical effects of the second rectifier circuit 214 are the same as those described above, and will not be repeated here.
- the structure of the second rectifier circuit 214 provided by the embodiment of the present application is not limited to the structures in Example 1, Example 2, and Example 3. Other arrangements of the second rectifier circuit 214 will not be repeated here, as long as The alternating current induced by the second receiving coil 212 can be rectified to output direct current, and after passing through the second voltage stabilizing circuit 224, the first voltage Vc for driving the first control 205 to be in the working state can be generated.
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Abstract
本申请实施例提供一种电子设备、无线充电接收装置及控制方法、无线充电***,涉及无线充电技术领域,用于在大功率快充和小功率慢充两种充电模式之间进行切换。该电子设备的无线充电接收装置中第一通讯电路接收充电数据,充电数据用于指示充电类型。第一控制器根据充电数据识别出充电类型为第一充电类型,输出第一整流控制信号,控制第一整流电路工作于半桥模式。第一控制器还根据充电数据识别出充电类型为第二充电类型,输出第二整流控制信号,控制第一整流电路工作于全桥模式。第一接收线圈接收交变磁场并输出第一感应电压。第一整流电路将第一接收线圈输出的第一感应电压转换成直流的供电电压,供电电压用于为电池供电。
Description
本申请要求于2019年12月31日提交国家知识产权局、申请号为201911415705.9、申请名称为“电子设备、无线充电接收装置及控制方法、无线充电***”的中国专利申请的优先权,以及于2020年01月17日提交国家知识产权局、申请号为202010054510.2、申请名称为“电子设备、无线充电接收装置及控制方法、无线充电***”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及无线充电技术领域,尤其涉及一种电子设备、无线充电接收装置及控制方法、无线充电***。
无线充电技术(wireless charging technology,WCT)利用电场、磁场、微波或者激光等传导介质来实现电能的无线传输,由于其具有无导线限制、无插拔等优势在电子设备上的应用越来越广泛。然而,目前上述电子设备例如手机进行无线充电时,无法实现大功率快充模式和小功率慢充模式之间的切换。
发明内容
本申请实施例提供一种电子设备、无线充电接收装置及控制方法、无线充电***,用于在大功率快充和小功率慢充两种充电模式之间进行切换。
为达到上述目的,本申请采用如下技术方案:
本申请实施例的第一方面,提供一种电子设备。该电子设备包括无线充电接收装置、电池和电路板。无线充电接收装置包括第一通讯电路、第一控制器、第一整流电路和第一接收线圈。第一通讯电路、第一控制器和第一整流电路设置于电路板上。第一通讯电路与第一控制器相耦接。第一通讯电路用于接收充电数据,充电数据用于指示充电类型。第一控制器与第一整流电路相耦接,用于根据充电数据识别出充电类型为第一充电类型,输出第一整流控制信号,控制第一整流电路工作于半桥模式。此时,电子设备可以进行小功率充电。此外,第一控制器还用于根据充电数据识别出充电类型为第二充电类型,输出第二整流控制信号,控制第一整流电路工作于全桥模式。此时电子设备可以进行大功率充电。第一接收线圈与第一整流电路相耦接,用于接收交变磁场并输出第一感应电压。第一整流电路还与电池相耦接,第一整流电路用于在上述全桥模式或者半桥模式下将第一感应电压转换成直流的供电电压,供电电压用于为电池供电。这样一来,本申请实施例提供的电子设备可以兼容两种充电方式进行充电。
可选的,无线充电接收装置还包括第二接收线圈以及设置于电路板上的启动电路。该第二接收线圈用于接收交变磁场并输出第二感应电压。第一接收线圈的电感量小于第二接收线圈的电感量。启动电路与第二接收线圈相耦接。该启动电路用于将第二感应电压转换成直流的第一电压,并传输至第一控制器。第一电压大于或等于第一控制器的最低工作电压。第一控制器还用于在接收到第一电压后,向第一整流电路输出第一整流控制信号。由上述可知,无线充电发送装置中发射线圈能够发射交变磁场。上 述电子设备中的第一接收线圈接收上述交变磁场并输出第一感应电压,第二接收线圈接收上述交变磁场并输出第二感应电压。在此情况下,发射线圈可以与第一接收线圈构成一个电压变换器。发射线圈可以与第二接收线圈构成另一个电压变换器。基于此,一方面,由于第一接收线圈的电感量小于第二接收线圈的电感量,所以可以使得第一接收线圈的电感量可以小于发射线圈的电感量。这样一来,发射线圈与第一接收线圈构成的电压变换器能够具有降压的功能。在此情况下,当电子设备进行大功率充电时,发射线圈的输入电压会升高,但是该电压可以通过发射线圈与第一接收线圈构成的电压变换器进行降压,从而可以减小第一整流电路输出端的电压转换电路的级联数量,从而能够减少在大功率充电的过程中,由于电压转换电路级联数目过多导致功率传输效率损耗较大的问题。另一方面,当发射线圈与第一接收线圈构成的电压变换器具有降压作用后,会使得第一整流电路输出的电压太小,而不足以驱动第一控制器。在此情况下,由于第二接收线圈的电感量大于第一接收线圈的电感量,且与第二接收线圈相耦接的启动电路可以将第二接收线圈输出的第二感应电压转换成第一电压。由于该第一电压大于或等于第一控制器的最低工作电压,所以第一电压能够驱动第一控制器,使得第一控制器可以向第一整流电路输出第一整流控制信号和第二整流控制信号,从而可以控制第一整流电路向电压转换电路提供上述供电电压。因此,本申请实施例提供的电子设备在进行大功率充电时,可以通过电感量较小的第一接收线圈,对输入的电压进行降压,以减小大功率充电的功耗。此外,还可以通过第二接收线圈实现第一控制器的正常驱动。
可选的,无线充电接收装置还包括设置于电路板上的第一稳压电路。第一稳压电路与电池以及第一控制器相耦接。第一稳压电路用于当供电电压小于第一稳压电路的预设稳压电压时,将电池的电压传输至第一控制器,以为第一控制器供电。第一稳压电路还用于当供电电压大于第一稳压电路的预设稳压电压时,断开电池和第一控制器。此外,第一控制器与第一整流电路的输出端相耦接。所以第一整流电路输出的供电电压还用于为第一控制器供电。这样一来,当发射线圈与第一接收线圈构成的电压变换器具有降压作用后,会使得第一整流电路输出的电压太小,而不足以驱动第一控制器。第一稳压电路可以将电池中剩余的电量提供至第一控制器,以为第一控制器供电,使得第一控制器向第一整流电路输出第一整流控制信号和第二整流控制信号。
可选的,无线充电接收装置还包括设置于电路板上的电压转换电路。电压转换电路与第一整流电路和电池相耦接。电压转换电路用于将供电电压进行转换,并使用转换后的电压为电池供电。
可选的,第一接收线圈和第二接收线圈的绕制方式可以为第一接收线圈设置于第二接收线圈内部。第一接收线圈的第一端和第二端,位于第二接收线圈的第一端和第二端之间。
可选的,第一接收线圈和第二接收线圈的绕制方式还可以为第二接收线圈设置于第一接收线圈内部。第一接收线圈的第一端和第二端,位于第二接收线圈的第一端和第二端之间。
可选的,第一接收线圈和第二接收线圈的绕制方式还可以为第二接收线圈的一部分设置于第一接收线圈内部,另一部分设置于第一接收线圈的外部。第一接收线圈的 第一端和第二端,位于第二接收线圈的第一端和第二端之间。
可选的,将电子设备放在底座上刚开始进行充电时,由于无线充电接收装置刚开始执行充电过程,发送线圈输入的电压为固定值。所以当第二接收线圈与底座中的发送线圈的对准位置出现较大偏差时,第二接收线圈输出的感应电压越小。因此,在第二接收线圈与发送线圈之间的位置偏差达到预设最大值,例如10mm时,仍然能够保证第二接收线圈输出的感应电压,在经过启动电路转换为第一控制器进行供电,使得第一控制器向第一整流电路输出第一整流控制信号和第二整流控制信号。上述第二接收线圈的电感量可以为第一接收线圈电感量的4倍。
可选的,启动电路可以包括第二整流电路。第二整流电路包括串联的第一二极管和第二二极管,以及串联的第三二极管和第四二极管。第一二极管和第三二极管的阴极与第一控制器相耦接。第二二极管和第四二极管的阳极均与接地端相耦接。无线充电接收装置还包括第一谐振电容。第一谐振电容的第一端与第二接收线圈的第一端相耦接,第一谐振电容的第二端与第一二极管的阳极和第二二极管的阴极相耦接。第二接收线圈的第二端与第三二极管的阳极和第四二极管的阴极相耦接。上述第二整流电路为全桥整流电路,并只工作于全桥模式。
可选的,启动电路包括第二整流电路。第二整流电路包括串联的第一二极管和第二二极管。第一二极管的阴极与第一控制器相耦接。无线充电接收装置还包括第一谐振电容。第一谐振电容的第一端与第二接收线圈的第一端相耦接,第一谐振电容的第二端与第一二极管的阳极和第二二极管的阴极相耦接。第二接收线圈的第二端和第二二极管的阳极均与接地端相耦接。上述第二整流电路为半桥整流电路,并只工作于半桥模式。
可选的,启动电路包括第二整流电路。第二整流电路包括串联的第一二极管和第二二极管。无线充电接收装置还包括串联的第一谐振电容和第二谐振电容。第一二极管的阴极和第一谐振电容的第一端与第一控制器相耦接。第二二极管的阳极和第二谐振电容的第二端均与接地端相耦接。第二接收线圈的第一端与第一二极管的阳极和第二二极管的阴极相耦接。第二接收线圈的第二端耦接于第一谐振电容的第二端和第二谐振电容第一端之间。上述第二整流电路为半桥整流电路,并只工作于半桥模式。
可选的,启动电路还包括第二稳压电路。第二稳压电路与第二整流电路和第一控制器相耦接。第二稳压电路用于当供电电压小于第二稳压电路的预设稳压电压时,将第二整流电路输出的电压转换成第一电压。第二稳压电路还用于当供电电压大于第二稳压电路的预设稳压电压时,断开第二整流电路和第一控制器。此外,第一控制器与第一整流电路的输出端相耦接,上述第一整流电路输出的供电电压可以为第一控制器供电。这样一来,当发射线圈与第一接收线圈构成的电压变换器具有降压作用后,会使得第一整流电路输出的电压太小,而不足以驱动第一控制器。第二稳压电路可以将第二整流电路输出的电压转换成第一电压,以为第一控制器供电,使得第一控制器向第一整流电路输出第一整流控制信号和第二整流控制信号。此外,当第一整流电路输出的供电电压大于第二稳压电路的预设稳压电压时,第二稳压电路会断开第二整流电路和第一控制器。从而使得第一整流电路输出的供电电压可以为第一控制器供电。在此情况下,上述启动电路只需要在第一整流电路输出的电压太小,不足以驱动第一控 制器时进行工作,当第一整流电路输出供电电压后,启动电路可以停止工作。
可选的,启动电路还包括第二稳压电路。第二稳压电路与第二整流电路和第一控制器相耦接,第二稳压电路用于将第二整流电路输出的电压转换成第一电压。这样一来,无线充电接收装置工作的过程中,启动电路会一直向第一控制器提供第一电压。
本申请实施例的第二方面,提供一种无线充电***,包括无线充电发送装置,以及如上所述的任意一种电子设备。所述无线充电发送装置包括发送线圈。发送线圈用于发射交变磁场。电子设备中的第一接收线圈用于接收交变磁场并输出第一感应电压。发送线圈的电感量大于第一接收线圈的电感量。该无线充电***具有与前述实施例提供的电子设备相同的技术效果,此处不再赘述。
可选的,电子设备中的第一通讯电路用于接收充电数据,充电数据用于指示充电类型。当电子设备中的第一控制器根据充电数据识别出充电类型为第二充电类型时,第一通讯电路还用于发送第一调压指令。第一调压指令用于指示增大第一接收线圈的输入电压。无线充电发送***还包括与发送线圈耦接的适配器。此外,无线充电发送装置还包括第二通讯电路以及第二控制器。第二通讯电路与第一通讯电路相耦接。第二通讯电路用于发送充电数据并接收第一调压指令。第二控制器与适配器和第二通讯电路相耦接,第二控制器用于根据第一调压指令生成第一调压控制信号,第一调压控制信号用于增大适配器的输出电压。这样一来,可以通过增大适配器的输出电压实现对电子设备的大功率充电。
可选的,电子设备中的第一通讯电路用于接收充电数据,充电数据用于指示充电类型。当电子设备中的第一控制器根据充电数据识别出充电类型为第二充电类型时,第一通讯电路还用于发送第一调压指令。第一调压指令用于指示增大第一接收线圈的输入电压。无线充电发送***还包括与发送线圈耦接的适配器。无线充电发送装置还包括调压电路、第二通讯电路以及第二控制器。调压电路与发送线圈和适配器相耦接。该调压电路用于调节适配器向发送线圈输出的电压。第二通讯电路与第一通讯电路相耦接,第二通讯电路用于发送充电数据并接收第一调压指令。第二控制器与调压电路和第二通讯电路相耦接,第二控制器根据第一调压指令生成第一调压控制信号。第一调压控制信号用于增大调压电路的输出电压。这样一来,可以通过增大调压电路的输出电压实现对电子设备的大功率充电。
本申请实施例的第三方面,提供一种无线充电接收装置。该无线充电接收装置包括第一通讯电路、第一控制器、第一整流电路和第一接收线圈。第一通讯电路与第一控制器相耦接。第一通讯电路用于接收充电数据,充电数据用于指示充电类型。第一控制器与第一整流电路相耦接,用于根据充电数据识别出充电类型为第一充电类型,输出第一整流控制信号,控制第一整流电路工作于半桥模式。第一控制器还用于根据充电数据识别出充电类型为第二充电类型,输出第二整流控制信号,控制第一整流电路工作于全桥模式。第一接收线圈与第一整流电路相耦接,用于接收交变磁场并输出第一感应电压。第一整流电路用于将第一感应电压转换成直流的供电电压,供电电压用于为电池供电。上述无线充电接收装置具有与前述实施例提供的电子设备相同的技术效果,此处不再赘述。
可选的,无线充电接收装置还包括第二接收线圈以及启动电路。该第二接收线圈 用于接收交变磁场并输出第二感应电压。第一接收线圈的电感量小于第二接收线圈的电感量。启动电路与第二接收线圈相耦接。该启动电路用于将第二感应电压转换成直流的第一电压,并传输至第一控制器。第一电压大于或等于第一控制器的最低工作电压。第一控制器还用于在接收到第一电压后,向第一整流电路输出第一整流控制信号。第二接收线圈和启动电路的技术效果同上所述,此处不再赘述。
可选的,无线充电接收装置还包括第一稳压电路。第一稳压电路与电池以及第一控制器相耦接。第一稳压电路用于当供电电压小于第一稳压电路的预设稳压电压时,将电池的电压传输至第一控制器,以为第一控制器供电。第一稳压电路还用于当供电电压大于第一稳压电路的预设稳压电压时,断开电池和第一控制器。此外,第一控制器与第一整流电路的输出端相耦接。所以第一整流电路输出的供电电压还用于为第一控制器供电。上述第一稳压电路的技术效果同上所述,此处不再赘述。
可选的,无线充电接收装置还包括电压转换电路。电压转换电路与第一整流电路和电池相耦接。电压转换电路用于将供电电压进行转换,并使用转换后的电压为电池供电。
可选的,第一接收线圈和第二接收线圈的绕制方式可以为第一接收线圈设置于第二接收线圈内部。第一接收线圈的第一端和第二端,位于第二接收线圈的第一端和第二端之间。
可选的,第一接收线圈和第二接收线圈的绕制方式还可以为第二接收线圈设置于第一接收线圈内部。第一接收线圈的第一端和第二端,位于第二接收线圈的第一端和第二端之间。
可选的,第一接收线圈和第二接收线圈的绕制方式还可以为第二接收线圈的一部分设置于第一接收线圈内部,另一部分设置于第一接收线圈的外部。第一接收线圈的第一端和第二端,位于第二接收线圈的第一端和第二端之间。
可选的,第二接收线圈的电感量为第一接收线圈电感量的4倍。第二接收线圈的电感量以及第一接收线圈电感量设置的技术效果同上所述,此处不再赘述。
可选的,启动电路包括第二整流电路。第二整流电路包括串联的第一二极管和第二二极管,以及串联的第三二极管和第四二极管。第一二极管和第三二极管的阴极与第一控制器相耦接。第二二极管和第四二极管的阳极均与接地端相耦接。无线充电接收装置还包括第一谐振电容。第一谐振电容的第一端与第二接收线圈的第一端相耦接,第一谐振电容的第二端与第一二极管的阳极和第二二极管的阴极相耦接。第二接收线圈的第二端与第三二极管的阳极和第四二极管的阴极相耦接。上述第二整流电路为全桥整流电路,并只工作于全桥模式。
可选的,启动电路包括第二整流电路。第二整流电路包括串联的第一二极管和第二二极管。第一二极管的阴极与第一控制器相耦接。无线充电接收装置还包括第一谐振电容。第一谐振电容的第一端与第二接收线圈的第一端相耦接,第一谐振电容的第二端与第一二极管的阳极和第二二极管的阴极相耦接。第二接收线圈的第二端和第二二极管的阳极均与接地端相耦接。上述第二整流电路为半桥整流电路,并只工作于半桥模式。
可选的,启动电路包括第二整流电路。第二整流电路包括串联的第一二极管和第 二二极管。无线充电接收装置还包括串联的第一谐振电容和第二谐振电容。第一二极管的阴极和第一谐振电容的第一端与第一控制器相耦接。第二二极管的阳极和第二谐振电容的第二端均与接地端相耦接。第二接收线圈的第一端与第一二极管的阳极和第二二极管的阴极相耦接。第二接收线圈的第二端耦接于第一谐振电容的第二端和第二谐振电容第一端之间。上述第二整流电路为半桥整流电路,并只工作于半桥模式。
可选的,启动电路还包括稳压电路。第二稳压电路与第二整流电路和第一控制器相耦接。第二稳压电路用于当供电电压小于第二稳压电路的预设稳压电压时,将第二整流电路输出的电压转换成第一电压。第二稳压电路还用于当供电电压大于第二稳压电路的预设稳压电压时,断开第二整流电路和第一控制器。此外,第一控制器与第一整流电路的输出端相耦接,上述第一整流电路输出的供电电压可以为第一控制器供电。第二稳压电路的技术效果同上所述,此处不再赘述。
可选的,启动电路还包括第二稳压电路。第二稳压电路与第二整流电路和第一控制器相耦接,第二稳压电路用于将第二整流电路输出的电压转换成第一电压。这样一来,无线充电接收装置工作的过程中,启动电路会一直向第一控制器提供第一电压。
本申请实施例的第四方面,提供一种无线充电接收装置的控制方法。无线充电接收装置包括第一通讯电路、第一控制器、第一整流电路以及第一接收线圈。第一通讯电路与第一控制器相耦接。第一整流电路与第一接收线圈、第一控制器以及电池相耦接。上述控制方法包括:首先,第一通讯电路接收启动信号,无线充电接收装置启动。接下来,第一接收线圈接收交变磁场并输出第一感应电压。接下来,第一控制器输出第一整流控制信号,控制第一整流电路工作于半桥模式。第一整流电路将第一感应电压转换成供电电压。接下来,第一通讯电路接收充电数据,充电数据用于指示充电类型。第一控制器根据充电数据识别出充电类型为第二充电类型,输出第二整流控制信号,控制第一整流电路工作于全桥模式。第一整流电路将第一感应电压转换成直流的供电电压。电池接收供电电压,并进行充电。上述无线充电接收装置的控制方法具有与前述实施例提供的电子设备相同的技术效果,此处不再赘述。
可选的,方法还包括首先,第一控制器发送第二调压指令。第二调压指令用于指示减小第一接收线圈的输入电压。第一控制器向第一整流电路输出第一整流控制信号,控制第一整流电路工作于半桥模式。这样一来,当在电子设备进行大功率充电时,还可以根据需要切换至小功率充电。
可选的,无线充电接收装置还包括第二接收线圈以及启动电路。第一接收线圈的电感量小于第二接收线圈的电感量。第一控制器输出第一整流控制信号之前,方法还包括:首先,第二接收线圈接收交变磁场并输出第二感应电压。接来下,启动电路将第二感应电压转换成直流的第一电压,并传输至第一控制器。第一电压大于或等于第一控制器的最低工作电压。上述第二接收线圈以及启动电路的技术效果同上所述,此处不再赘述。
可选的,无线充电接收装置还包括第一稳压电路。第一稳压电路与电池以及第一控制器相耦接。第一控制器输出第一整流控制信号之前,方法还包括:当供电电压小于第一稳压电路的预设稳压电压时,第一稳压电路将电池的电压传输至第一控制器。或者,当供电电压大于第一稳压电路的预设稳压电压时,第一稳压电路断开电池和第 一控制器。第一控制器接收供电电压。上述第一稳压电路的技术效果同上所述,此处不再赘述。
可选的,无线充电接收装置还包括电压转换电路。电压转换电路与第一整流电路和电池相耦接。电池接收供电电压之前,方法还包括无线充电接收装置中的电压转换电路将供电电压进行转换,并使用转换后的电压为电池供电。电压转换电路的技术效果同上所述,此处不再赘述。
图1a为本申请实施例提供的一种电子设备与无线充电***的结构示意图;
图1b为图1a中电子设备的结构示意图;
图2a为本申请实施例提供的一种无线充电***的结构示意图;
图2b为本申请实施例提供的另一种无线充电***的结构示意图;
图2c为本申请实施例提供的另一种无线充电***的结构示意图;
图2d为本申请实施例提供的另一种无线充电***的结构示意图;
图3a为本申请实施例提供的另一种无线充电***的结构示意图;
图3b为本申请实施例提供的另一种无线充电***的结构示意图;
图4为本申请实施例提供的另一种无线充电***的结构示意图;
图5a为本申请实施例提供的第一接收线圈和第二接收线圈的一种绕制方式示意图;
图5b为本申请实施例提供的第一接收线圈和第二接收线圈的另一种绕制方式示意图;
图5c为本申请实施例提供的第一接收线圈和第二接收线圈的另一种绕制方式示意图;
图6a为本申请实施例提供的无线充电接收装置的另一种结构示意图;
图6b为本申请实施例提供的无线充电接收装置的另一种结构示意图;
图7为本申请实施例提供的无线充电接收装置的另一种结构示意图;
图8为本申请实施例提供的一种无线充电的控制方法流程图;
图9a为图7中启动电路的一种工作方式示意图;
图9b为图7中启动电路的另一种工作方式示意图;
图10a为图7中第一整流电路的一种控制信号时序图;
图10b为图7中第一整流电路的另一种控制信号时序图;
图10c为图7中第一整流电路的另一种控制信号时序图;
图11a为图7中第一整流电路的一种工作方式示意图;
图11b为图7中第一整流电路的另一种工作方式示意图;
图12为图7中第一整流电路的另一种控制信号时序图;
图13a为图7中第一整流电路的另一种工作方式示意图;
图13b为图7中第一整流电路的另一种工作方式示意图;
图14为本申请实施例提供的无线充电接收装置的另一种结构示意图;
图15为本申请实施例提供的无线充电接收装置的另一种结构示意图。
附图标记:
01-电子设备;02-充电底座;20-无线充电接收装置;30-无线充电发送装置;40-适配器;50-电池;10-显示屏;11-中框;110-承载板;111-边框;12-壳体;301-第二通讯电路;302-DC/AC;303-第二振荡电路;304-第二控制器;305-调压电路;201-第一通讯电路;202-第一振荡电路;203-第一整流电路;204-启动电路;205-第一控制器;206-电压转换电路;211-第一接收线圈;212-第二接收线圈;202-第一振荡电路;311-发送线圈;214-第二整流电路;224-第二稳压电路;225-第一稳压电路;61-第一开关组件;62-第二开关组件;63-第三开关组件;64-第四开关组件。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。
以下,术语“第一”、“第二”等仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中,除非另有说明,“多个”的含义是两个或两个以上。
此外,本申请中,“上”、“下”等方位术语可以包括但不限于相对附图中的部件示意置放的方位来定义的,应当理解到,这些方向性术语可以是相对的概念,它们用于相对于的描述和澄清,其可以根据附图中部件附图所放置的方位的变化而相应地发生变化。
在本申请中,除非另有明确的规定和限定,术语“连接”应做广义理解,例如,“连接”可以是固定连接,也可以是可拆卸连接,或成一体;可以是直接相连,也可以通过中间媒介间接相连。此外,术语“耦接”可以是实现信号传输的电性连接的方式。“耦接”可以是直接的电性连接,也可以通过中间媒介间接电性连接。
本申请实施例提供一种的电子设备。该电子设备包括手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、智能穿戴产品(例如,智能手表、智能手环)、虚拟现实(virtual reality,VR)终端设备、增强现实(augmented reality AR)终端设备等具有无线设备。上述电子设备还可以是无线充电电动汽车、无线充电家用小型电器(例如豆浆机、扫地机器人)、无人机等电子产品。本申请实施例对上述电子设备的具体形式不做特殊限制。以下为了方便说明,是以电子设备01为如图1a所示的手机为例进行的说明。
为了对上述电子设备01进行无线充电,本申请实施例提供的无线充电***包括设置于电子设备01内的,如图1a所示的无线充电接收(receive,RX)装置20和与该无线充电接收装置20相耦接的电池50。
上述无线充电***还包括如图1a所示的设置于充电底座02内的无线充电发送(transmit,TX)装置30,以及与该无线充电发送装置30相耦接的适配器40。该适配器40用于提供充电电能。该适配器40能够将220V的交流电根据充电功率的需要转换成直流电(例如5V或10V等),并将该直流电传输至无线充电发送装置30。
上述电子设备01以手机为例,如图1b所示,主要包括显示屏(display panel,DP)10。该显示屏10可以为液晶显示(liquid crystal display,LCD)屏,或者,有机发光二极管(organic light emitting diode,OLED)显示屏。本申请对此不作限定。上述电 子设备01还包括如图1b所示的中框11和壳体12。显示屏10和壳体12分别位于中框11的两侧,显示屏10的背面朝向壳体12,且该显示屏10和壳体12通过中框11相连接。其中,中框11包括承载板110以及绕承载板110一周的边框111。
电子设备01还可以包括印刷电路板(printed circuit boards,PCB)。该PCB和电池50设置于承载板110朝向壳体12的一侧表面。此外,上述无线充电接收装置20可以包括如图2a所示的第一振荡电路202。第一振荡电路202可以包括如图2b所示的第一接收线圈211和第三谐振电容CRX3。上述第一接收线圈211可以如图1b所示设置于上述承载板110上,或者,还可以设置于电池50朝向壳体12的一侧表面上。
为了对电子设备01进行无线充电,如图2a所示,无线充电发送装置30包括直流(direct current,DC)转交流(alternating current,AC)转换器,即DC/AC302、第二振荡电路303。DC/AC302与适配器40相耦接,能够将适配器40输出的直流电转换成交流电。第二振荡电路303与DC/AC302相耦接。
第二振荡电路303可以包括如图2b所示的第四谐振电容C
TX以及发送线圈311。DC/AC302将适配器40输出的直流电转换成交流电,并传输至第二振荡电路303后,可以使得第二振荡电路303中的发送线圈311上产生高频交流电并发射交变磁场。第一振荡电路202中的第一接收线圈211接收上述交变磁场并输出第一感应电压,从而使得第二振荡电路303的功率能够传输至第一振荡电路202。
此外,无线充电接收装置20中除了接收线圈,例如上述第一接收线圈211以外的电路部分可以单独封装成一个芯片,集成于PCB上。在本申请的一些实施例中,无线充电接收装置20中制作于PCB上的上述电路部分可以包括如图2b所示的第一通讯电路201、第一控制器205、第一整流电路203。
当将电子设备01的背面放在上述充电底座02上时,无线充电发送装置30和无线充电接收装置20之间可以建立无线通信,在此情况下,如图2b所示,无线充电发送装置30可以包括第二通讯电路301。上述第一通讯电路201和第二通讯电路301之间可以通过蓝牙(bluetooth)、无线宽带(wireless-fidelity,WiFi)、紫蜂协议(Zigbee)、射频识别技术(radio frequency identification,RFID)、远程(long range,Lora)无线技术和近距离无线通信技术(near field communication,NFC)实现无线连接,以使得无线充电发送装置30和无线充电接收装置20之间可以建立无线通信。
这样一来,第一通讯电路201和第二通讯电路301之间可以传输控制信号或者传输充电数据。其中,该充电数据可以用于指示充电类型。示例的,该充电数据可以为充电协议,例如无线充电联盟(wireless power consortium,WPC)推出的无线充电标准Qi,例如BPP(basic power profile)协议,或者EPP(extended power profile)协议等。
此外,如图2b所示,第一通讯电路201与第一控制器205相耦接。该第一控制器205可以对第二通讯电路301发送至第一通讯电路201的充电协议进行识别,以判断出电子设备01的充电类型,例如该充电类型可以为第一充电类型(例如,适用于慢充的小功率充电)或者,上述充电类型可以为第二充电类型(例如,适用于快充的大功率充电)。
此外,第一控制器205与第一整流电路203相耦接。本申请实施例中的第一整流 电路203可以具有两种工作模式,分别为半桥模式和全桥模式。当第一控制器205根据上述充电数据识别出充电类型为第一充电类型,可以输出第一整流控制信号,控制第一整流电路203工作于半桥模式。处于半桥模式下的第一整流电路203能够将接收到的交流电波形的正半周波形保留(或去除),负半周波形去除(或保留),以生成直流电。
此外,当第一控制器205根据上述充电数据识别出充电类型为第二充电类型,可以输出第二整流控制信号,控制第一整流电路203工作于全桥模式。其中,处于全桥模式下的第一整流电路203能够将接收到的交流电波形的正半周和负半周波形转换成同一极性,以生成直流电。
如图2b所示,第一整流电路203还与第一接收线圈211相耦接。第一整流电路203工作于上述任意一种模式下,均可以将第一接收线圈211输出的第一感应电压进行整流,生成直流的供电电压Vrect。供电电压Vrect用于为电池50供电。
在本申请的一些实施例中,当上述供电电压Vrect的电压值与电池50的充电电压(例如,3.7V)的电压值相同或近似相同时,上述供电电压Vrect可以如图2b所示直接对电池50进行充电。此时,当供电电压Vrect施加至电池50后,第一整流电路203输出的电流可以对该电池50进行充电。
或者,在本申请的另一些实施例中,当供电电压Vrect大于电池50的充电电压(例如,3.7V)时,为了避免直接采用供电电压Vrect对该电池50进行充电而造成电池50的损坏,如图2c所示,上述无线充电接收装置20还包括与第一整流电路203耦接的至少一级电压转换电路206。该电压转换电路206可以设置于电子设备01中的PCB(如图1a所示)上。该电压转换电路206可以对供电电压Vrect进行转换(例如降压处理),并使得转换后的电压(例如,3.7V)为电池50供电。该电压转换电路206输出的电压施加至电池50后,第一整流电路203输出的电流可以对该电池50进行充电。
所以供电电压Vrect用于为至电池50供电是指,在不会对电池50造成损坏的前提下,供电电压Vrect可以直接为电池50供电。或者,供电电压Vrect可以经过至少一级电压转换电路206的降压转换后再为电池50供电。
在本申请的一些实施例中,上述电压转换电路206包括DC/DC转换电路。上述DC/DC转换电路可以为降压(Buck)电路或者为开关电容(switched capacitor,SC)电路。其中,Buck电路的输入输出电压比值可以灵活调整,例如输入输出电压比值可以设定为小数。SC电路的输入输出电压比值为整数,但是SC电路可以承受较高的输入输出压差,且具有较高的电压转换效率。
基于此,为了提高电池50的充电速度,可以增加充电功率。此时,当无线充电发送装置30支持第二充电类型(例如,适用于快充的大功率充电)时,该第二通讯电路301可以向第一通讯电路201发送与大功率充电相匹配的充电协议。当第一控制器205进行该充电协议的握手识别,并识别出上述充电协议时,该第一控制器205可以向第一通讯电路201发送第一调压指令。该第一调压指令用于指示增大第二振荡电路303的输出电压。
在此情况下,如图2c所示,无线充电发送装置30还包括与第二通讯电路301相耦接的第二控制器304。在本申请的一些实施例中,该第二控制器304可以与DC/AC302 以及适配器40相耦接。当第二控制器304接收到第二通讯电路301输出的第一调压指令后,生成第一调压控制信号。该第一调压控制信号用于调节适配器40的输出电压,以达到增大适配器40的输出电压的目的。
这样一来,当适配器40的输出电压增大后,与该适配器40相耦接的DC/AC302输出的直流电压也会增大。此外,DC/AC302将适配器40输出的直流电转换成交流电,并传输至第二振荡电路303后,可以使得第二振荡电路303中的发送线圈311上产生高频交流电并发射交变磁场。所以当DC/AC302输出的直流电压增大时,发送线圈311上产生高频交流电也会增大,从而达到增大第二振荡电路303的输出电压的目的。
或者,在本申请的另一些实施例中,如图2d所示,无线充电发送装置30还包括与DC/AC302以及适配器40相耦接的调压电路305。该调压电路305可以调节适配器40向DC/AC302输出的电压。当第二控制器304接收到第二通讯电路301输出的第一调压指令后,生成第一调压控制信号。该第一调压控制信号用于增大调压电路305的输出电压。这样一来,DC/AC302输出的直流电压也会增大,从而达到增大第二振荡电路303的输出电压的目的。
由上述可知,为了对电池50进行充电,电压转换电路206输出电压为该电池50的第三电压(例如,3.7V)。因此,当第二振荡电路303的输出电压增大后,无线充电接收装置20输入电压和输出电压之间的电压差会增大。在此情况下,为了减小无线充电接收装置20的发热,以下对本申请实施例提供的无线充电接收装置20的结构进行详细的举例说明。
示例一
本示例中,如图3a所示,无线充电接收装置20中的第一振荡电路202可以包括上述第一接收线圈211。第一接收线圈211与发射线圈311之间可以形成一个电压变换器。
该电压变换器输入端的电压U(即发射线圈311的输入电压),与输出端的电压U1(即第一接收线圈211的输出电压)的比值U/U1,等于发射线圈311的匝数N与第一接收线圈211的匝数N1之比N/N1,即U/U1=N/N1。
此外,线圈的匝数与线圈的电感量的平方成正比。因此,该电压变换器的输入、输出电压比值U/U1,可以等于发射线圈311的电感量L的平方根与第一接收线圈211的电感量L1的平方根的比值,如图公式(1)。
由上述可知,在发射线圈311电感量一定的情况下,可以通过设置第一接收线圈211的电感量,达到调节由发射线圈311和第一接收线圈211构成的电压变换器的输入输出电压比值U/U1的目的。例如,当发射线圈311和第一接收线圈211构成的电压变换器需要实现降压功能时,可以使得该第一接收线圈211的电感量小于第二振荡电路303中发送线圈311的电感量。
为了方便说明例如,发送线圈311的电感量为L时,第一接收线圈211的电感量L1可以为发送线圈311电感量L的1/n,即L1=(1/n)L。其中,n≥2,n为正整数。
在此情况下,由上述公式(1)可知,第一接收线圈211的输出电压U1与发送线 圈311的输入电压U之间的比值可以为
示例的,当n=4时,即第一接收线圈211的电感量L1为发送线圈311电感量L的1/4时,发送线圈311和第一接收线圈211构成的电压变换器的增益可以为2:1。此时,第一接收线圈211输出的电压可以为发送线圈311输入电压的一半,达到降低第一接收线圈211输出电压的目的。
这样一来,一方面,由于第一整流电路203与第一接收线圈211相耦接,因此当第一接收线圈211的输出电压减小后,可以第一整流电路203的输入电压,有利于实现对第一整流电路203的保护。
另一方面,当采用大功率充电时,由上述可知发送线圈311的输入电压会增大,例如由小功率充电时的5V增加至10V。此时,10V电压通过发送线圈311和第一接收线圈211构成的电压变换器后,第一接收线圈211输出电压会降低至5V。在此情况下,相对于发送线圈311和第一接收线圈211构成的电压变换器的增益为1:1,第一接收线圈211输出电压为10V的方案而言,本申请的方案可以有效减小电压转换电路206的输入电压。
此外,由于电压转换电路206向电池50输出的电压用于向电池50进行充电,其数值是固定的,例如3.7V。因此,在电压按转换电路206输出端的电压固定的情况下,通过减小电压转换电路206输入端的电压,可以减小电压转换电路206输入端和输出端的电压差。从而能够减小电压转换电路206在电压变换过程中产生的热量,以及由该热量造成的电压转换过程中存在的损耗,达到提高电压转换电路206的电压转换效率的目的,有利于提升大功率供电的效率。
此外,由上述可知,第一控制器205可以对第一通讯电路201接收到的充电协议进行识别。因此为了使得无线充电接收装置20能够启动,需要向第一控制器205进行供电。在本申请的一些实施例中,如图3a所示,第一控制器205可以与第一整流电路203的输出端相耦接。这样一来,当第一整流电路203的输出端有电压输出时,该电压可以为第一控制器205进行供电,以使得第一控制器205能够向第一整流电路203输出上述第一整流控制信号或者第二整流控制信号。
然而,由上述可知,为了减小第一接收线圈211的输出电压,第一接收线圈211的电感量小于第二振荡电路303中发送线圈311的电感量。并且,当第一接收线圈211输出的电压较小时,经过第一整流电路203整流后输出的电压不足以启动第一控制器205,导致无线充电无法进行。
为了解决上述问题,本申请实施例提供的无线充电接收装置20的第一振荡电路202还包括如图3a所示的第二接收线圈212以及与第二接收线圈212和第一控制器205相耦接的启动电路204。其中,启动电路204可以设置于电子设备01中的PCB(如图1b所示)上。第二接收线圈212可以接收发送线圈311发射的交变磁场并输出第二感应电压,所以同理可得发送线圈311与第二接收线圈212也可以构成另一个电压变换器。
启动电路204可以将第二接收线圈212输出的第二感应电压转换成直流的第一电压Vc。该第一电压Vc可以大于或等于第一控制器205的最低工作电压,即(under voltage lock out,UVLO)状态下的电压。在此情况下,第一电压Vc可以为第一控制器205供电,从而使得第一控制器205向第一整流电路203输出第一整流控制信号或 者第二整流控制信号。在第一整流控制信号的控制下工作于半桥模式的第一整流电路203,或者在第二整流控制信号控制下,工作于全桥模式的第一整流电路203可以将第一接收线圈211输出的电压转换成供电电压Vrect。
在此情况下,为了使得第二接收线圈212输出的第二感应电压,经过启动电路204转换后能够足以驱动第一控制器205输出上述第一整流控制信号或者第二整流控制信号,上述第二接收线圈212的电感量可以大于第一接收线圈211的电感量。
需要说明的是,将电子设备01放在底座02上刚开始进行充电时,由于无线充电接收装置20刚开始执行充电过程,发送线圈311输入的电压为固定值。所以当第二接收线圈212与底座02中的发送线圈311的对准位置出现较大偏差时,第二接收线圈212输出的第二感应电压越小。因此,在第二接收线圈212与发送线圈311之间的位置偏差达到预设最大值,例如10mm时,仍然能够保证第二接收线圈212输出的第二感应电压,在经过启动电路204转换后驱动第一控制器205输出第一整流控制信号或者第二整流控制信号。该第二接收线圈212的电感量可以为第一接收线圈211电感量的4倍。
此外,第二接收线圈212的电感量可以大于发送线圈311的电感量,也可以小于发送线圈311的电感量,或者可以与发送线圈311的电感量相同或近似相同。本申请对此不作限定。只要能够保证发送线圈311与第二接收线圈212构成的电压变换器,使得第二接收线圈212输出的第二感应电压,在经过启动电路204转换后能够足以驱动第一控制器205输出上述第一整流控制信号或者第二整流控制信号即可。以下为了方便说明,第二接收线圈212和发送线圈311的电感量可以相同,此时,第二接收线圈212和发送线圈311构成的电压变换器的增益可以为1:1。
在本申请的一些实施例中,如图3b所示,启动电路204可以包括第二整流电路214以及第二稳压电路224。示例的,上述第二稳压电路224可以为低压差线性稳压器(low dropout regulator,LDO)。
第二整流电路214与第二接收线圈212和第二稳压电路224相耦接。第二稳压电路224还与第一控制器205以及接地端GND相耦接。即如图3b所示,第二稳压电路224、第一控制器205以及第一整流电路203的输出端均耦接于节点Q。
在此情况下,第二整流电路214可以将第二接收线圈212输出的交流电进行整流,以生成直流电。该直流电经过第二稳压电路224的稳压处理后,可以由第二稳压电路224向上述节点Q输出第一电压Vc。第一电压Vc为第一控制器205供电。
如图3b所示,该第一控制器205还与第一整流电路203的输出端相耦接。在第一控制器205向第一整流电路203输出第一整流控制信号或者第二整流控制信号,以使得第一整流电路203输出供电电压Vrect的情况下,当该供电电压Vrect大于第二稳压电路224的预设稳压电压V1时,该第二稳压电路224的输出端可以处于断开的状态,从而可以切断上述启动电路204,使得该启动电路204终止向第一控制器205进行供电。此时,由于第一控制器205与第一整流电路203的输出端相耦接,因此,第一整流电路203可以向节点Q输出的供电电压Vrect。该供电电压Vrect可以为第一控制器205供电。
需要说明的是,第二稳压电路224的预设稳压电压V1可以在电子设备01出厂之 前,根据第一控制器205的参数,例如上述UVLO电压进行设置。由上述可知,启动电路204输出的第一电压Vc需要大于或等于UVLO电压,因此上述预设稳压电压V1可以大于第一电压Vc,从而使得第一整流电路203输出供电电压Vrect大于第二稳压电路224的预设稳压电压V1时,该第二稳压电路224的输出端可以处于断开的状态,即第二稳压电路224的输出端与节点Q断开。
由上述可知,当第二稳压电路224的输出端与节点Q耦接时,第二稳压电路224用于向节点Q供电。当第二稳压电路224的输出端与节点Q断开时,第一整流电路203向节点Q供电。所以在同一时刻,节点Q只有一个电压,该电压能够为第一控制器205供电。
或者,在本申请的另一些实施例中,如图4所示,启动电路204中的第二稳压电路224的输出端与第一控制器205的输入端相耦接。这样一来,无线充电接收装置20工作的过程中,启动电路204会一直向第一控制器205提供第一电压Vc。
需要说明的是,在电子设备01充电的过程中,当启动电路204一直开启时,第二接收线圈212会一直接收发射线圈311发射的交变磁场,并产生第二感应电压。虽然该第二接收线圈212输出第二感应电压的过程中会出现发热,但是在无线充电过程中,线圈的发热对充电功耗的影响较小可以忽略。
以下为了方便说明,均是以图3b所示的结构中第二稳压电路224、第一控制器205以及第一整流电路203的输出端均耦接于节点Q为例进行的说明。
由上述可知,发送线圈311和第二接收线圈212构成的电压变换器,可以使得第二接收线圈212输出的第二感应电压,经过启动电路204转换后驱动第一控制器205输出第一整流控制信号或者第二整流控制信号。与此同时,发送线圈311和第一接收线圈211构成的电压变换器,可以减小第一接收线圈211的输出电压。第一振荡电路202中的第一接收线圈211的电感量小于第二接收线圈212的电感量。
在本申请的一些实施例中,第一接收线圈211和第二接收线圈212可以采用相同的金属轴线进行绕制,不同之处在于,第一接收线圈211的绕制圈数可以小于第二接收线圈212的绕制圈数,从而使得第一接收线圈211的电感量可以小于第二接收线圈212的电感量。
或者,在本申请的另一些实施例中,第一接收线圈211可以采用较粗的金属走线绕制而成,第二接收线圈212可以采用较细的金属走线绕制而成。此外,第一接收线圈211的绕制圈数可以小于第二接收线圈212的绕制圈数。例如,当第一接收线圈211的电感量为第二接收线圈212电感量的一半时,第一接收线圈211的绕制圈数可以为或者近似为第二接收线圈212绕制圈数的一半。第一接收线圈211和第二接收线圈212的其余绕制方式在此不再一一赘述,只要能够使得第一接收线圈211的电感量小于第二接收线圈212的电感量即可。
此外,在本申请的一些实施例中,如图5a所示,第一接收线圈211可以设置于第二接收线圈212内部。在此情况下,第一接收线圈211的第一端②和第二端③,位于第二接收线圈212的第一端①和第二端④之间。
或者,在本申请的另一些实施例中,如图5b所示,第二接收线圈212设置于第一接收线圈211内部。该第一接收线圈211的第一端②和第二端③,位于第二接收线圈 212的第一端①和第二端④之间。
又或者,在本申请的又一些实施例中,如图5c所示,第二接收线圈212的一部分设置于第一接收线圈211内部,另一部分设置于第一接收线圈211的外部。该第一接收线圈211的第一端②和第二端③,位于第二接收线圈212的第一端①和第二端④之间。
需要说明的是,上述是以在无线充电接收装置20中设置第二接收线圈212和启动电路204以驱动第一控制器205为例进行的说明。在本申请的一些实施例中,当电子设备01充电,且发射线圈311和第一接收线圈211的位置对准时,第一整流电路203输出的电压足以启动第一控制器205。在此情况下,无线充电接收装置20中无需设置上述第二接收线圈212和启动电路204。此时无线充电接收装置20的结构如图6a所示,第一整流电路203输出的电压可以直接驱动第一控制器205,以使得第一控制器205向第一整流电路203输出第一整流控制信号或者第二整流控制信号。
或者,在本申请的另一些实施例中,如图6b所述,无线充电接收装置还包括第一稳压电路225。该第一稳压电路225可以设置于上述电子设备01的PCB上。第一稳压电路225可以与电池50的两端,以及第一控制器205相耦接。第一稳压电路225用于将电池50的电压传输至第一控制器205,以为第一控制器205供电。这样一来,当电池50中剩余的电量足够驱动第一控制器205时,可以采用电池50中剩余的电量去驱动第一控制器205。
此外,当第一整流电路203输出供电电压Vrect大于第一稳压电路225的预设稳压电压V2时,该第一稳压电路225用于断开电池50和第一控制器205的连接。即第一稳压电路225的输出端与节点Q断开。此时,由于第一控制器205与第一整流电路203的输出端相耦接,因此,第一整流电路203可以向节点Q输出的供电电压Vrect。该供电电压Vrect可以为第一控制器205供电,使得第一控制器205向第一整流电路203输出第一整流控制信号或者第二整流控制信号。其中,上述第一稳压电路225的预设稳压电压V2的设置方式与上述第二稳压电路224的预设稳压电压V1的设置方式同理,此处不再赘述。
本申请对上述第一控制器205的启动方式不做限定,以下为了方便说明,均是以无线充电接收装置20中设置第二接收线圈212和启动电路204以驱动第一控制器205为例,对第一整流电路203、第二整流电路214的结构进行详细的举例说明。
如图7所示,第一整流电路203包括并联的第一桥臂和第二桥臂。其中,第一桥臂包括串联的第一开关组件61和第二开关组件62。第二桥臂包括串联的第三开关组件63和第四开关组件64。上述第一开关组件61、第二开关组件62、第三开关组件63和第四开关组件64中任意一个开关组件包括一个二极管和与该二极管并联的一个开关管。例如,第一开关组件61包括开关管Sa,第二开关组件62包括开关管Sb,第三开关组件63包括开关管Sa1,第四开关组件64包括开关管Sb1。
第一接收线圈211的第一端②耦接于第一开关组件61和第二开关组件62之间。即第一接收线圈211的第一端②耦接于第一开关组件61中二极管的阳极(anode,a)与第二开关组件62中二极管的阴极(cathode,c)之间。
由上述可知,第一振荡电路202还包括第三谐振电容C
RX3。第三谐振电容C
RX3 的第一端与第一接收线圈211的第一端②相耦接,第三谐振电容C
RX3的第二端耦接于第一开关组件61和第二开关组件62之间,从而使得第一接收线圈211的第一端②通过第三谐振电容C
RX3耦接于第一开关组件61和第二开关组件62之间。
此外,第一接收线圈211的第二端③耦接于第三开关组件63和第四开关组件64之间。即第一接收线圈211的第二端③耦接于第三开关组件63中二极管的阳极a与第四开关组件64中二极管的阴极c之间。
基于此,为了在第一控制器205输出的第一整流控制信号或者第二整流控制信号的控制下,使得第一整流电路203输出上述供电电压Vrect,上述第一开关组件61的控制端(即开关管Sa的控制端)、第二开关组件62的控制端(即开关管Sb的控制端)、第三开关组件63的控制端(即开关管Sb1的控制端)以及第四开关组件64的控制端(即开关管Sa1的控制端)均与上述第一控制器205相耦接。在此情况下,第一控制器205可以控制开关管Sa、开关管Sb、开关管Sb1、开关管Sa1的导通或者截止。
上述第一整流电路203还包括第一滤波电容C1。该第一滤波电容C1的第一端与第一开关组件61中的二极管的阴极c相耦接,第一滤波电容C1的第二端与接地端GND相耦接。
此外,在本示例中,启动电路204的第二整流电路214的结构如图7所示可以包括串联的第一二极管D1和第二二极管D2,以及串联的第三二极管D3和第四二极管D4。第一二极管D1和第三二极管D3的阴极c相耦接,作为第二整流电路214的输出端与第二稳压电路224相耦接。第二二极管D2和第四二极管D4的阳极a均与接地端GND相耦接。
第一振荡电路202还包括如图7所示的第一谐振电容C
RX1。第一谐振电容C
RX1的第一端与第二接收线圈212的第一端①相耦接,第一谐振电容C
RX1的第二端与第一二极管D2的阳极a和第二二极管D2的阴极c相耦接。第二接收线圈212的第二端④与第三二极管D2的阳极a和第四二极管D4的阴极c相耦接。
此外,上述第二整流电路214还可以包括第二滤波电容C2。该第二滤波电容C2的第一端与第三二极管D3的阴极c相耦接,第二滤波电容C2的第二端与接地端GND相耦接。
以下对具有上述无线充电发送装置30,以及如图7所示的无线充电接收装置20的无线充电***的控制方法进行详细的举例说明。该控制方法如图8所示包括S101~S108。
S101、无线充电发送装置30中的第二通讯电路301发送启动信号(可以称为Ping信号),无线充电接收装置20启动。
S102、无线充电接收装置20上电,且第一整流电路203工作于半桥模式。
当无线充电接收装置20中的第一通讯电路201接收到Ping信号后,该无线充电接收装置20按照设定好的上电时序,对其内部的一些部件,例如上述启动电路204进行上电。在此情况下,启动电路204可以将第二接收线圈212输出的交流电转换成直流的第一电压Vc。无线充电接收装置20中的第一控制器205接收到上述第一电压Vc后,可以输出第一整流控制信号,控制第一整流电路203工作于半桥模式。
示例的,当启动电路204中的第二整流电路214包括如图7所示的第一二极管D1、 第二二极管D2、第三二极管D3以及第四二极管D4时,该第二整流电路214可以为全桥整流电路。基于此,当第二接收线圈212上第二感应电压的极性(正极采用+表示,负极采用-表示)如图9a所示时,第二接收线圈212上的感应电压通过第一二极管D1、第四二极管D4形成的回路,生成第一电压Vc,并提供至第一控制器205。
此外,当第二接收线圈212上第二感应电压的极性切换,如图9b所示时,第二接收线圈212上的感应电压通过第二二极管D2、第三二极管D3形成的回路,生成第一电压Vc,并提供至第一控制器205。在此情况下,全桥式的第二整流电路214的输入输出电压比为1:1。
基于此,为了提高启动电路204输出的第一电压Vc的大小,以使得接收到第一电压Vc的第一控制器205能够输出上述第一整流控制信号。在本申请的一些实施例中,可以增大第二接收线圈212的电感量,例如使得第二接收线圈212的电感量与发射线圈311的电感量相当。在此情况下,当电子设备01的部件空间充足的情况下,可以增加用于绕制第二接收线圈212的金属走线的圈数。
或者,在本申请的另一些实施例中,可以第二稳压电路224替换为具有升压(boost)和降压功能DC/DC转换器。这样一来,通过该DC/DC转换器可以对第二整流电路214输出的电压进行升压处理,以使得启动电路204输出的第一电压Vc能够满足启动第一控制器205的要求。
当电子设备01放入底座02进行大功率充电的过程中,由于发送线圈311的输入电压会升高,所以如果第二接收线圈212与发射线圈311的位置没有对准而存在较大偏移时,第二接收线圈212产生的第二感应电压也会增大,从而导致启动电路204根据第二接收线圈212产生的感应电压生成的第一电压Vc会大于第一控制器205的最大工作电压。此时为了避免启动电路204输出的电压过大而损坏第一控制器205,上述该DC/DC转换器还可以对第二整流电路214输出的电压进行降压处理,以使得启动电路204输出的第一电压Vc小于第一控制器205的最高工作电压。
在此基础上,当启动电路204向第一控制器205输出满足设计要求的第一电压Vc后,该第一控制器205处于工作状态,并向第一整流电路203输出第一整流控制信号,以控制第一整流电路203工作于半桥模式,并输出供电电压Vrect。
S103、对电子设备01进行小功率充电。
本申请实施例提供的无线充电***可以默认为支持第一充电类型,例如,适用于慢充的小功率充电,发送线圈311提供的电压例如为5V。示例的,由上述可知,发送线圈311和第一接收线圈211构成的电压变换器的增益可以为2:1,因此第一接收线圈211输出的电压可以为2.5V。在此情况下,该第一接收线圈211输出的电压太小,无法达到电池50的充电要求(例如,电池50两端的第三电压可以为3.7V)。因此第一整流电路203在对第一接收线圈211输出的交流电进行整流的过程中,还需要对第一接收线圈211输出的电压进行升压。
在此情况下,该第一控制器205刚开始接收到启动电路204输出的第一电压Vc后,输出的第一整流控制信号可以控制图7所示的第一整流电路203工作于半桥模式。其中,上述第一整流控制信号可以是在第一控制器205中提前配置好的。为了使得第一整流电路203工作于半桥模式。第一控制器205输出的上述提前配置好的第一整流 控制信号(Sa、Sb、Sb1、Sa1)可以如图10a所示。
当无线充电接收装置20刚启动时,第一整流电路203接收到的电流较小,此时该第一整流电路203处于如图10a所示的半桥二极管整流阶段P1。第一开关管Sa的控制端接收到的信号为高电平,该第一开关管Sa处于导通状态,其余开关管的控制端接收到的信号为低电平,因此其余开关管处于截止状态(开关管处于断开状态)。如图10b所示,在半桥二极管整流阶段P1,发送线圈311提供的电压Vin由0V逐渐增大。在此情况下,第一整流电路203输出的供电电压Vrect也由0V逐渐增大。
随着第一整流电路203接收到的电流逐渐增大,该第一整流电路203处于如图10a所示的半桥同步整流阶段P2。此时,第一开关管Sa的控制端接收到的信号为高电平(采用“1”表示)。第三开关管Sb1和第四开关管Sa1的控制端接收到的信号交替为高电平,从而可以将第一开关管Sa一直导通,第三开关管Sb1和第四开关管Sa1交替导通。此外,第二开关管Sb的控制端接收到的信号为低电平(采用“0”表示),第二开关管Sb一直处于截止的状态。
具体的,当第一接收线圈211根据发射线圈311产生的交变磁场所输出的第一感应电压的极性(正极采用+表示,负极采用-表示)如图11a所示时,半桥模式下的第一整流电路203中,第一开关管Sa和第三开关管Sb1的控制端接收到的信号为高电平时,第一开关管Sa和第三开关管Sb1导通,其余开关管,例如第二开关管Sb和第四开关管Sa1处于截止状态(图11a中采用虚线表示)。第一整流电路203上的电流向第三谐振电容C
RX3进行充电至0.5倍的供电电压Vrect。该第三谐振电容C
RX3上述具有0.5Vrect电压的直流偏置。
接下来,当发射线圈311产生的交变磁场的方向发生变化时,第一接收线圈211根据磁场方向发生变化后的交变磁场输出的第一感应电压的极性(正极采用+表示,负极采用-表示)如图11b所示,与图11a中的感应电压的极性相反。此时,半桥模式中的第一整流电路203中,第一开关管Sa和第四开关管Sa1的控制端接收到的信号为高电平时,第一开关管Sa和第四开关管Sa1导通。其余开关管,例如第二开关管Sb和第三开关管Sb1截止(图11b中采用虚线表示)。
由于第三谐振电容C
RX3(其具有0.5倍的供电电压Vrect)和第一接收线圈211(其具有0.5倍的供电电压Vrect)串联,因此,第三谐振电容C
RX3上的电压和第一接收线圈211上的电压可以叠加给输出滤波电容C3(如图7所示,设置于电池50的两端)和电池50。此时,第一整流电路203输出的供电电压Vrect倍增,从而使得第一整流电路203输出的供电电压Vrect比收入至第一整流电路203的电压大。
需要说明的是,上述是以第一开关管Sa的控制端,如图10a所示,接收到的信号为高电平(采用“1”表示),第二开关管Sb的控制端接收到的信号为低电平(采用“0”表示)为例,对第一整流电路203工作于半桥同步整流阶段P2进行的说明。在本申请的另一些实施例中,如图10c所示,第一开关管Sa的控制端接收到的信号可以为低电平(采用“0”表示),第一开关管Sa一直处于截止状态。第二开关管Sb的控制端接收到的信号可以为高电平(采用“1”表示),第二开关管Sb一直处于导通状态。此时,第一整流电路203工作于如图10b所示的半桥同步整流阶段P2的过程同理可得,此处不再赘述。
在此情况下,第一整流电路203工作在半桥同步整流阶段P2,其输入输出电压的比值可以为或近似为1:2。其中,第一整流电路203的负载越小,工作在半桥同步整流阶段P2的第一整流电路203输入输出电压的比值越接近1:2。第一整流电路203的负载越大,工作在半桥同步整流阶段P2的第一整流电路203输出电压略微小于2倍的输入电压。以下为了方便说明,以工作在半桥模式下的第一整流电路203工作在半桥同步整流阶段P2时,该第一整流电路203输入输出电压的比值为1:2进行举例说明。
基于此,当无线充电***采用第一充电类型,发送线圈311提供的电压Vin例如为5V(图10b中的A1点的电压)。由于发送线圈311和第一接收线圈211构成的电压变换器的增益可以为2:1,因此第一接收线圈211输出的电压为2.5V。
此时,在如图10b所示的半桥同步整流阶段P2,该第一整流电路203输出的供电电压Vrect为5V(图10b中的B1点的电压)左右。这样一来,发送线圈311提供的电压Vin与第一整流电路203输出的供电电压Vrect(即电压转换电路206的输入电压)的比值为1:1。该电压转换电路206可以对上述供电电压Vrect(5V)进行转换,并将转换后的电压(例如,3.7V)为电池50进行供电。
需要说明的是,本申请实施例提供的无线充电接收装置20还可以包括如图7所述的开关管Sc。该开关管Sc耦接于第一整流电路203和电压转换电路206之间,开关管Sc的控制端可以与第一控制器205相耦接。这样一来,与第一整流电路203的输出端相耦接的第一控制器205,可以对第一整流电路203输出的电压进行采集。在电子设备01刚开始进行充电时,第一整流电路203输出的电压不够稳定,此时第一控制器205可以判断出第一整流电路203输出的电压无法达到电池50所需要的充电要求。该第一控制器205可以通过控制开关管Sc的控制端,使得开关管Sc处于断开的状态。从而避免第一整流电路203输出的不稳定的电压经过电压转换电路206的转换后,向电池50充电而影响电池50的性能。
此外,当第一整流电路203输出稳定的供电电压Vrect后,第一控制器205可以通过控制开关管Sc的控制端,使得开关管Sc处于导通的状态,从而将第一整流电路203输出供电电压Vrect能够经过控制开关管Sc传输至电压转换电路206。
本申请实施例提供的无线充电***还可以支持第二充电类型,例如,适用于快充的大功率充电,发送线圈311提供的电压例如为20V。此时,在进行大功率充电之前执行以下步骤S104。
S104、第二通讯电路301和第一通讯电路201建立通讯。
在此情况下,第二通讯电路301与第一通讯电路201之间可以建立通讯连接。第二通讯电路301可以向第一通讯电路201发送上述充电协议。第一通讯电路201将接收到的充电协议传输至第一控制器205。
S105、第二通讯电路301和第一通讯电路201通讯握手是否成功。
具体的,第一控制器205对上述充电协议进行识别,当识别出充电类型为上述第一充电类型时,执行上述步骤S103。当第一控制器205识别出充电类型为上述第二充电类型时,执行以下步骤S106。
S106、第二控制器生成第一调压控制信号。
当第一控制器205识别出充电类型为上述第二充电类型后,第一控制器205可以 向第一通讯电路201发送第一调压指令。该第一调压指令用于指示增大发送线圈311提供的电压。第二通讯电路301(如图2a所示)能够接收上述第一调压指令发送给第二控制器304。第二控制器304根据第一调压指令生成第一调压控制信号,使得发送线圈311提供的电压可以由之前的5V增大至20V。
S107、第一整流电路203工作于全桥模式。
由上述可知,发送线圈311和第一接收线圈211构成的电压变换器的增益可以为2:1,因此第一接收线圈211输出的电压可以为5V。在此情况下,当第一控制器205识别出充电类型为上述第二充电类型时,第一控制器205向图7所示的第一整流电路203输入第二整流控制信号,并控制第一整流电路203工作于全桥模式。
需要说明的是,当第一整流电路203刚由半桥模式切换为全桥模式时,第一整流电路203会先进入如图10b所示的全桥二极管整流阶段P3。在该全桥二极管整流阶段P3,该第一整流电路203中所有开关管(Sa、Sb、Sb1、Sa1)的控制端接收到的信号均为低电平(0),因此所有开关管均处于截止状态。
在此情况下,为了实现大功率充电,在全桥二极管整流阶段P3,发送线圈311提供的电压Vin由5V逐渐增大至20V左右,例如图10b中点A2的电压为18V,以下为了方便说明,以发送线圈311提供的电压Vin为20V为例。此外,由于第一整流电路203中各个开关管均处于截止状态,所以第一整流电路203输出的供电电压Vrect在全桥二极管整流阶段P3会有所下降。
当第一整流电路203完全进入全桥模式后,该第一整流电路203会处于如图10b所示的全桥同步整流阶段P4。第一控制器205输出的第二整流控制信号(Sa、Sb、Sb1、Sa1)可以如图12所示。其中,第一开关管Sa和第四开关管Sa1的控制端接收到的信号相同,第二开关管Sb和第三开关管Sb1的控制端接收到的信号相同。第一开关管Sa与第二开关管Sb的控制端接收到的信号相反。
此时,如图13a所示,第一开关管Sa和第四开关管Sa1为第一选通组,第二开关管Sb和第三开关管Sb1为第二选通组。处于全桥模式的第一整流电路203中的上述第一选通组和第二选通组交替导通。例如,图13a中第一选通组(第一开关管Sa和第四开关管Sa1)导通,第二选通组(第二开关管Sb和第三开关管Sb1)截止。图13b中,第一选通组(第一开关管Sa和第四开关管Sa1)截止,第二选通组(第二开关管Sb和第三开关管Sb1)导通。由全桥式的第二整流电路214的工作原理同理可得,第一整流电路203工作于全桥模式时,该第一整流电路203的输入输出电压比为1:1。
S108、对电子设备01进行大功率充电。
当对电子设备01进行大功率充电时,由上述可知,无线充电***采用第二充电类型,发送线圈311提供的电压Vin例如为20V,由于发送线圈311和第一接收线圈211构成的电压变换器的增益可以为2:1,因此第一接收线圈211输出的电压10V,该第一整流电路203输出的供电电压Vrect为10V(图10b中的B2点的电压)左右。这样一来,发送线圈311提供的电压Vin与第一整流电路203输出的供电电压Vrect(即电压转换电路206的输入电压)的比值为2:1。该电压转换电路206可以对上述供电电压Vrect(10V)转换进行转换,并将转换后的电压(例如,3.7V)对电池50进行充电。经过电压转换电路206降压后,由于充电功率为大功率,所以单位时间内流入电池50 的电流有所增加,从而可以实现快充。
综上所述,一方面,由上述可知,第一接收线圈211的电感量可以为发送线圈311电感量的1/n,示例的,当第一接收线圈211的电感量可以为发送线圈311电感量的1/4时,发送线圈311和第一接收线圈211构成的电压变换器的增益为2:1,第一接收线圈211输出至第一整流电路203的电压为发送线圈311输入电压的一半。
因此,无论无线充电***采用第一充电类型(小功率)还是第二充电类型(大功率)对电子设备01进行充电,均能够减小第一接收线圈211向第一整流电路203输出的第一感应电压。从而可以能够减小无线充电接收装置20出现过载保护(over voltage protection,OVP)现象的几率。
此外,由于第一整流电路203接收的电压有所减小,因此可以降低第一整流电路203的耐压。在此情况下,上述第一整流电路203中的第一开关管Sa、第二开关管Sb、第三开关管Sb1和第四开关管Sa1可以采用低压工艺制备的金属氧化物半导体(metal oxide semiconductor,MOS)场效应晶体管构成。从而达到降低生产成本的目的。
第二方面,当无线充电***采用第二充电类型(大功率)对电池50进行充电时,由发送线圈311和第一接收线圈211构成的电压变换器,可以降低第一接收线圈211输出的第一感应电压,因此无线充电接收装置20可以只设置一级电压转换电路206(例如,降压比值为2:1的SC电路)。这样一来,可以减少无线充电接收装置20中电压转换电路206的级联数量,从而能够减少由于电压转换电路206级联数目过多导致功率传输效率损耗较大的问题。
以下,对电压转换电路206级联对无线充电接收装置20的输出功率的影响进行说明。
首先,设定发送线圈311和第一接收线圈211构成的电压变换器的效率恒定。增益为2:1的电压变换器与增益为1:1的电压变换器的输出功率(W=UI)相同,此时,如表1所示,上述两个变换器中第一接收线圈211上线圈损耗相同。表1为上述两个电压变换器中第一接收线圈211的电感值、电阻值、输出电压、线圈电流以及线圈损耗的具体数值。
表1
由表1可知,发送线圈311和第一接收线圈211构成的电压变换器增益为1:1时,第一接收线圈211的电感值、电阻值、线圈电压以及线圈电流均与发送线圈311的数值相同。
当发送线圈311的电感值(L)、电阻值(R)、输出电压(U)以及线圈电流(I)保持不变的情况下,在发送线圈311和第一接收线圈211构成的电压变换器增益为2:1的情况下,由上述可知,第一接收线圈211的电感值为(1/4)L。
由上述公式(1)可知,第一接收线圈211的输出电压为
在电压变换器输出功率不变的情况下,由于功率W=UI,所以第一接收线圈211的线圈电流为
这样一来,由焦耳定律可得第一接收线圈211上线圈损耗Q=I
2R。所以当增益为1:1的电压变换器和增益为2:1的电压变换器的输出功率相同的情况下,上述两个变压器中第一接收线圈211上线圈损耗相同。示例的,以发送线圈311输出的效率为15W,发送线圈311和第一接收线圈211构成的增益为1:1的电压变换器和增益为2:1电压变换器的效率均为可以为97%。
此外,第一整流电路203的转换效率可以为98%,一级降压比值为2:1的SC电路的转换效率为97%为例,该充电接收装置20的总效率为97%×98%×97%=92.2%。无线充电接收装置20的输出功率为15W×92.3%=13.83W。
因此,在发送线圈311和第一接收线圈211构成的电压变换器、第一整流电路203的效率不变的情况下,级联的数目越少,无线充电接收装置20的输出功率越高。此外,在发送线圈311和第一接收线圈211构成的电压变换器、第一整流电路203的效率不变,并且电压转换电路206的级联数目不变的情况下,电压转换电路206自身的效率越高,无线充电接收装置20的输出功率越高。
例如,当电压转换电路206为转换效率是94.1%的buck电压时,同理可得,充电接收装置20的总效率为97%×98%×97%=89.5%。无线充电接收装置20的输出功率为15W×89.5%=13.43W。所以,当电压转换电路206为转换效率是97%降压比值为2:1的SC电路时,该当无线充电接收装置20中的输出功率可以提升(13.83W-13.43W)/13.83W=3%。
此外,由于上述无线充电接收装置20中只设置了一级电压转换电路206,因此可以减小无线充电接收装置20的尺寸,有利于减小无线充电接收装置20在电子设备01中的部件空间。
第三方面,由图7可知,上述无线充电接收装置20在一开始执行充电过程时,该无线充电接收装置20中的第一整流电路203工作于半桥模式,此时电子设备进行第一充电类型(小功率)充电。当第二通讯电路301与第一通讯电路201之间建立通讯连接,且第二通讯电路301发送的大功率充电协议被第一控制器205识别,以实现通讯握手后,第一整流电路203可以工作于全桥模式,此时无线充电***采用第二充电类型(大功率)对电子设备01进行充电。此外,如果上述通讯握手失败,即第二通讯电路301发送充电协议,无法被第一控制器205识别为上述大功率充电协议时,无线充电***继续采用第一充电类型(小功率)对电子设备01进行充电。因此,无线充电***可以同时兼容第一充电类型(小功率)和第二充电类型(大功率)。
此外,在电子设备01进行大功率充电时,还可以根据需要切换至小功率充电。例如,当电子设备01在大功率充电的过程中,电池50产生的热量较大时,可以由大功率充电切换至小功率充电。或者,当电池50充满或即将充满时,为了减少能量损耗或对电池50的不良影响,可以由大功率充电切换至小功率充电。又或者,电子设备01例如手机的显示界面上可以设置充电模式的充电模式选择图标,由用户根据需要自行控制上述充电模式选择图标,从而将大功率充电切换至小功率充电。
此时,第一控制器205可以向第一通讯电路201发送第二调压指令。第二调压指令用于指示减小第一接收线圈211的输入电压。由上述可知,在本申请的一些实施例中,如图2a所示,无线充电发送装置30中第二通讯电路301可以将第二调压指令传 输至第二控制器304。该第二控制器304接收到第二通讯电路301输出的第二调压指令后,生成第二调压控制信号。该第二调压控制信号用于减小适配器40的输出电压,此时发送线圈311提供的电压也会减小,例如减小至5V。由上述可知,发送线圈311和第一接收线圈211构成的电压变换器的增益可以为2:1,因此第一接收线圈211输出的电压可以为2.5V。从而达到减小第一接收线圈211的输入电压的目的。
或者,如图2d所示,当无线充电发送装置30还包括与DC/AC302以及适配器40相耦接的调压电路305时,上述第二控制器304接收到第二通讯电路301输出的第二调压指令后,生成第二调压控制信号。该第二调压控制信号用于减小调压电路305的输出电压,以达到减小第一接收线圈211的输入电压的目的。
此外,第一控制器205还会向第一整流电路203输出第一整流控制信号,控制第一整流电路203工作于如图10b所示的半桥同步整流阶段P2(第二个P2阶段)。在第一整流电路203工作于半桥同步整流阶段P2时,上述电子设备01进行小功率充电的过程同上所述,此处不再赘述。
需要说明的是,当第一整流电路203刚由全桥模式转换为半桥模式时,需要经过如图10b所示的全桥二极管整流阶段P3。其中,第一整流电路203在全桥二极管整流阶段P3,发送线圈311提供的电压Vin会减小至5V左右(如图10b中的节点A3的电压)。此时,第一整流电路203输出的供电电压Vrect也会降低至5V左右(如图10b中的节点B3的电压)。该第一整流电路203在全桥二极管整流阶段P3的工作过程同上所述,此处不再赘述。
此外,当电子设备01中的电池50充满电后,如果电子设备01仍然放在底座02上,为了减少电子设备的发热情况,如图10b所示,上述第一整流电路203会进入半桥二极管整流阶段P1(第二个P1阶段),此时,虽然发送线圈311提供的电压Vin仍然为5V,但是第一整流电路203输出的供电电压Vrect会有所下降,会减少电子设备的发热情况。
当然,上述是对电子设备01由大功率充电切换至小功率充电的说明。该电子设备01还可以根据需要,例如用户对上述充电模式选择图标进行控制,将小功率充电切换至大功率充电。此时,第一控制器205可以向第一通讯电路201发送上述第一调压指令,且该第一控制器205还会向第一整流电路203输出第二整流控制信号,控制第一整流电路203工作于全桥模式。通过上述第一调压指令提升第一接收线圈211的输入电压,以及第一整流电路203工作于全桥模式的过程在此不再一一赘述。
综上所述,当无线充电接收装置20刚启动时,第一整流电路203先进入半桥二极管整流阶段P1,然后再进入半桥同步整流阶段P2,以使得电子设备01进行小功率充电。当第二通讯电路301和第一通讯电路201通讯握手成功后,即当第一控制器205识别出充电类型为上述第二充电类型时,第一整流电路203从半桥模式切换至全桥模式,以使得电子设备01进行大功率充电。此后,电子设备01可以根据需要在大功率充电和小功率充电之间进行切换,此时,第一整流电路203也随之进行全桥模式和半桥模式的切换。其中,第一整流电路203刚从全桥模式切换至半桥模式时,或者,第一整流电路203刚从半桥模式切换至全桥模式时,该第一整流电路203均需要经过上述如图10b所示的全桥二极管整流阶段P3。此外,当电子设备01充好电后,第一整 流电路203进入上述半桥二极管整流阶段P1,以使得第一整流电路203输出的供电电压Vrect有所减小,减少电子设备的发热情况。
示例二
本示例中,无线充电接收装置20的结构如图14所示,与示例一的不同之处在于启动电路204(图4)中的第二整流电路214的结构不同。该充电接收装置20中其余元器件的设置方式以及控制方法同上所述,此处不再赘述。
示例的,该第二整流电路214包括串联的第一二极管D1、第二二极管D2以及第二滤波电容C2。其中,第一二极管D1的阴极c作为该第二整流电路214的输出端,与第二稳压电路224相耦接,从而使得第二整流电路214的输出端通过第二稳压电路224与第一控制器205相耦接。该第二滤波电容C2的第一端与第一二极管D1的阴极c相耦接,第二滤波电容C2的第二端与接地端GND相耦接。本示例中的第二整流电路214相对于图7所示的第二整流电路214而言,二极管的数量有所减小,从而可以节省制作第二整流电路214中电子元器件的数量,简化电路结构。
此外,第一振荡电路202中的第一谐振电容C
RX1的第一端与第二接收线圈212的第一端相耦接,第一谐振电容C
RX1的第二端与第一二极管D1的阳极a和第二二极管D2的阴极c相耦接。此外,第二接收线圈212的第二端和第二二极管D2的阳极a均与接地端GND相耦接。
在此情况下,上述第二整流电路214为半桥整流电路,其只工作于半桥模式。基于此,参考第一整流电路203的半桥模式,可知半桥模式的第二整流电路214的输入输出电压比可以为1:2。这样一来,第二整流电路214输出的电压大于第二整流电路214的输入电压。从而能够有效提高启动电路204输出的第一电压Vc的大小,以使得接收到第一电压Vc的第一控制器能够处于工作状态。基于此,由于第二整流电路214能够对输出电压进行提升,所以无需增大第二接收线圈212的电感量以提高输入至第二整流电路214的电压。这样一来,由于第二接收线圈212的电感量无需增大,所以可以减小第二接收线圈212中金属走线的绕制圈数,达到减小第二接收线圈212在电子设备01中的部件空间的目的。
或者,在本申请的另一些实施例中,可以将第二稳压电路224替换为具有升压和降压功能DC/DC转换器。该升压和降压功能DC/DC转换器的技术效果同上所述,此处不再赘述。
示例三
本示例中,无线充电接收装置20的结构如图15所示,与示例一的不同之处在于启动电路204(图4)中的第二整流电路214的结构不同。该充电接收装置20中其余元器件的设置方式以及控制方法同上所述,此处不再赘述。
示例的,该第二整流电路214包括串联的第一二极管D1、第二二极管D2以及第二滤波电容C2。其中,第一二极管D1的阴极c作为该第二整流电路214的输出端,与第二稳压电路224相耦接从而使得第二整流电路214的输出端通过第二稳压电路224与第一控制器205相耦接。
该第二滤波电容C2的第一端与第一二极管D1的阴极c相耦接,第二滤波电容C2的第二端与接地端GND相耦接。本示例中的第二整流电路214相对于图7所示的 第二整流电路214而言,二极管的数量有所减小,从而可以节省制作第二整流电路214中电子元器件的数量,简化电路结构。此外,同上所述,可以减小第二接收线圈212的匝数,达到减小部件空间的目的。
此外,第一振荡电路202还包括串联的第一谐振电容C
RX1和第二谐振电容C
RX2。第一二极管D1的阴极c和第一谐振电容C
RX1的第一端相耦接。第二二极管D2的阳极a和第二谐振电容C
RX2的第二端均与接地端GND相耦接。此外,第二接收线圈212的第一端与第一二极管D1的阳极a和第二二极管D2的阴极c相耦接,第二接收线圈212的第二端耦接于第一谐振电容C
RX1的第二端和第二谐振电容C
RX2第一端之间。
在此情况下,上述第二整流电路214为半桥整流电路,其只能工作于半桥模式。第二整流电路214的工作过程以及技术效果同上所述,此处不再赘述。
需要说明的是,本申请实施例提供的第二整流电路214的结构不仅限于示例一、示例二以及示例三中的结构,该第二整流电路214其他设置方式在此不再一一赘述,只要能够对第二接收线圈212感应的交流电进行整流输出直流电,并经过第二稳压电路224后,生成用于驱动第一控制205处于工作状态的第一电压Vc即可。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何在本申请揭露的技术范围内的变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。
Claims (34)
- 一种电子设备,其特征在于,包括无线充电接收装置、电池和电路板;所述无线充电接收装置包括第一通讯电路、第一控制器、第一整流电路和第一接收线圈;所述第一通讯电路、所述第一控制器和所述第一整流电路设置于所述电路板上;所述第一通讯电路与所述第一控制器相耦接;所述第一通讯电路用于接收充电数据,所述充电数据用于指示充电类型;所述第一控制器与所述第一整流电路相耦接,用于根据所述充电数据识别出所述充电类型为第一充电类型,输出第一整流控制信号,控制所述第一整流电路工作于半桥模式;所述第一控制器还用于根据所述充电数据识别出所述充电类型为第二充电类型,输出第二整流控制信号,控制所述第一整流电路工作于全桥模式;所述第一接收线圈与所述第一整流电路相耦接,用于接收交变磁场并输出第一感应电压;所述第一整流电路还与所述电池相耦接,所述第一整流电路用于将所述第一感应电压转换成直流的供电电压,所述供电电压用于为所述电池供电。
- 根据权利要求1所述的电子设备,其特征在于,所述无线充电接收装置还包括第二接收线圈以及设置于所述电路板上的启动电路;所述第二接收线圈用于接收交变磁场并输出第二感应电压;所述第一接收线圈的电感量小于所述第二接收线圈的电感量;所述启动电路与所述第二接收线圈以及所述第一控制器相耦接;所述启动电路用于将所述第二感应电压转换成直流的第一电压,并传输至所述第一控制器;所述第一电压大于或等于所述第一控制器的最低工作电压;所述第一控制器还用于在接收到所述第一电压后,向所述第一整流电路输出所述第一整流控制信号,控制所述第一整流电路工作于半桥模式。
- 根据权利要求1所述的电子设备,其特征在于,所述无线充电接收装置还包括设置于所述电路板上的第一稳压电路;所述第一稳压电路与所述电池以及所述第一控制器相耦接;所述第一稳压电路用于当所述供电电压小于所述第一稳压电路的预设稳压电压时,将所述电池的电压传输至所述第一控制器;所述第一稳压电路还用于当所述供电电压大于所述第一稳压电路的预设稳压电压时,断开所述电池和所述第一控制器;所述第一控制器与所述第一整流电路的输出端相耦接;所述供电电压还用于为所述第一控制器供电,控制所述第一整流电路工作于半桥模式。
- 根据权利要求1-3任一项所述的电子设备,其特征在于,所述无线充电接收装置还包括设置于所述电路板上的电压转换电路;所述电压转换电路与所述第一整流电路和所述电池相耦接;所述电压转换电路用于将所述供电电压进行转换,并使用转换后的电压为所述电池供电。
- 根据权利要求2所述的电子设备,其特征在于,所述第一接收线圈设置于所述第二接收线圈内部;所述第一接收线圈的第一端和第二端,位于所述第二接收线圈的第一端和第二端之间。
- 根据权利要求2所述的电子设备,其特征在于,所述第二接收线圈设置于所述 第一接收线圈内部;所述第一接收线圈的第一端和第二端,位于所述第二接收线圈的第一端和第二端之间。
- 根据权利要求2所述的电子设备,其特征在于,所述第二接收线圈的一部分设置于所述第一接收线圈内部,另一部分设置于所述第一接收线圈的外部;所述第一接收线圈的第一端和第二端,位于所述第二接收线圈的第一端和第二端之间。
- 根据权利要求2、5、6或7所述的电子设备,其特征在于,所述第二接收线圈的电感量为所述第一接收线圈电感量的4倍。
- 根据权利要求2所述的电子设备,其特征在于,所述启动电路包括第二整流电路;所述第二整流电路包括串联的第一二极管和第二二极管,以及串联的第三二极管和第四二极管;所述第一二极管和所述第三二极管的阴极与所述第一控制器相耦接;所述第二二极管和所述第四二极管的阳极均与接地端相耦接;所述无线充电接收装置还包括第一谐振电容;所述第一谐振电容的第一端与所述第二接收线圈的第一端相耦接,所述第一谐振电容的第二端与所述第一二极管的阳极和所述第二二极管的阴极相耦接;所述第二接收线圈的第二端与所述第三二极管的阳极和所述第四二极管的阴极相耦接。
- 根据权利要求2所述的电子设备,其特征在于,所述启动电路包括第二整流电路;所述第二整流电路包括串联的第一二极管和第二二极管;所述第一二极管的阴极与所述第一控制器相耦接;所述无线充电接收装置还包括第一谐振电容;所述第一谐振电容的第一端与所述第二接收线圈的第一端相耦接,所述第一谐振电容的第二端与所述第一二极管的阳极和所述第二二极管的阴极相耦接;所述第二接收线圈的第二端和所述第二二极管的阳极均与接地端相耦接。
- 根据权利要求2所述的电子设备,其特征在于,所述启动电路包括第二整流电路;所述第二整流电路包括串联的第一二极管和第二二极管;所述无线充电接收装置还包括串联的第一谐振电容和第二谐振电容;所述第一二极管的阴极和所述第一谐振电容的第一端与所述第一控制器相耦接;所述第二二极管的阳极和所述第二谐振电容的第二端均与接地端相耦接;所述第二接收线圈的第一端与所述第一二极管的阳极和所述第二二极管的阴极相耦接;所述第二接收线圈的第二端耦接于所述第一谐振电容的第二端和第二谐振电容的第一端之间。
- 根据权利要求9-11任一项所述的电子设备,其特征在于,所述启动电路还包括第二稳压电路;所述第二稳压电路与所述第二整流电路和所述第一控制器相耦接;所述第二稳压电路用于当所述供电电压小于所述第二稳压电路的预设稳压电压时,将所述第二整流电路输出的电压转换成所述第一电压;所述第二稳压电路还用于当所述供电电压大于 所述第二稳压电路的预设稳压电压时,断开所述第二整流电路和所述第一控制器;所述第一控制器与所述第一整流电路的输出端相耦接;所述供电电压还用于为所述第一控制器供电。
- 根据权利要求9-11任一项所述的电子设备,其特征在于,所述启动电路还包括第二稳压电路;所述第二稳压电路与所述第二整流电路和所述第一控制器相耦接,所述第二稳压电路用于将所述第二整流电路输出的电压转换成所述第一电压。
- 一种无线充电***,其特征在于,包括无线充电发送装置,以及如权利要求1-13任一项所述的电子设备;所述无线充电发送装置包括发送线圈;所述发送线圈用于发射交变磁场;所述电子设备中的第一接收线圈用于接收所述交变磁场并输出第一感应电压;所述发送线圈的电感量大于所述第一接收线圈的电感量。
- 根据权利要求14所述的无线充电***,其特征在于,所述电子设备中的第一通讯电路用于接收充电数据,所述充电数据用于指示充电类型;当所述电子设备中的第一控制器根据充电数据识别出充电类型为第二充电类型时,所述第一通讯电路还用于发送第一调压指令;所述第一调压指令用于指示增大所述第一接收线圈的输入电压;所述无线充电***还包括与所述发送线圈耦接的适配器;所述无线充电发送装置还包括第二通讯电路和第二控制器;所述第二通讯电路与所述第一通讯电路相耦接;所述第二通讯电路用于发送所述充电数据并接收所述第一调压指令;所述第二控制器与所述适配器和所述第二通讯电路相耦接,所述第二控制器用于根据所述第一调压指令生成第一调压控制信号;所述第一调压控制信号用于增大所述适配器的输出电压。
- 根据权利要求14所述的无线充电***,其特征在于,所述电子设备中的第一通讯电路用于接收充电数据,所述充电数据用于指示充电类型;当所述电子设备中的第一控制器根据充电数据识别出充电类型为第二充电类型时,所述第一通讯电路还用于发送第一调压指令;所述第一调压指令用于指示增大所述第一接收线圈的输入电压;所述无线充电***还包括与所述发送线圈耦接的耦接的适配器;所述无线充电发送装置还包括调压电路、第二通讯电路以及第二控制器;所述调压电路与所述发送线圈和所述适配器相耦接;所述调压电路用于调节所述适配器向所述发送线圈输出的电压;所述第二通讯电路与所述第一通讯电路相耦接;所述第二通讯电路用于发送所述充电数据并接收所述第一调压指令;所述第二控制器与所述调压电路和所述第二通讯电路相耦接;所述第二控制器用于根据所述第一调压指令生成第一调压控制信号;所述第一调压控制信号用于增大所述调压电路的输出电压。
- 一种无线充电接收装置,其特征在于,包括第一通讯电路、第一控制器、第一整流电路和第一接收线圈;所述第一通讯电路与所述第一控制器相耦接;所述第一通讯电路用于接收充电数据,所述充电数据用于指示充电类型;所述第一控制器与所述第一整流电路相耦接,用于根据所述充电数据识别出所述充电类型为第一充电类型,输出第一整流控制信号,控制所述第一整流电路工作于半桥模式;所述第一控制器还用于根据所述充电数据识别出所述充电类型为第二充电类型,输出第二整流控制信号,控制所述第一整流电路工作于全桥模式;所述第一接收线圈与所述第一整流电路相耦接,用于接收交变磁场并输出第一感应电压;所述第一整流电路用于将所述第一感应电压转换成直流的供电电压,所述供电电压用于为电池供电。
- 根据权利要求17所述的无线充电接收装置,其特征在于,所述无线充电接收装置还包括第二接收线圈以及启动电路;所述第二接收线圈用于接收交变磁场并输出第二感应电压;所述第一接收线圈的电感量小于所述第二接收线圈的电感量;所述启动电路与所述第二接收线圈以及所述第一控制器相耦接;所述启动电路用于将所述第二感应电压转换成直流的第一电压,并传输至所述第一控制器;所述第一电压大于或等于所述第一控制器的最低工作电压;所述第一控制器还用于在接收到所述第一电压后,向所述第一整流电路输出所述第一整流控制信号。
- 根据权利要求17所述的无线充电接收装置,其特征在于,所述无线充电接收装置还包括第一稳压电路;所述第一稳压电路与所述电池以及所述第一控制器相耦接;所述第一稳压电路用于当所述供电电压小于所述第一稳压电路的预设稳压电压时,将所述电池的电压传输至所述第一控制器;所述第一稳压电路还用于当所述供电电压大于所述第一稳压电路的预设稳压电压时,断开所述电池和所述第一控制器;所述第一控制器与所述第一整流电路的输出端相耦接;所述供电电压还用于为所述第一控制器供电。
- 根据权利要求17-19任一项所述的无线充电接收装置,其特征在于,所述无线充电接收装置还包括电压转换电路;所述电压转换电路与所述第一整流电路和所述电池相耦接;所述电压转换电路用于将所述供电电压进行转换,并使用转换后的电压为所述电池供电。
- 根据权利要求18所述的无线充电接收装置,其特征在于,所述第一接收线圈设置于所述第二接收线圈内部;所述第一接收线圈的第一端和第二端,位于所述第二接收线圈的第一端和第二端之间。
- 根据权利要求18所述的无线充电接收装置,其特征在于,所述第二接收线圈设置于所述第一接收线圈内部;所述第一接收线圈的第一端和第二端,位于所述第二接收线圈的第一端和第二端之间。
- 根据权利要求18所述的无线充电接收装置,其特征在于,所述第二接收线圈的一部分设置于所述第一接收线圈内部,另一部分设置于所述第一接收线圈的外部;所述第一接收线圈的第一端和第二端,位于所述第二接收线圈的第一端和第二端之间。
- 根据权利要求18、21、22或23所述的无线充电接收装置,其特征在于,所述第二接收线圈的电感量为所述第一接收线圈电感量的4倍。
- 根据权利要求18所述的无线充电接收装置,其特征在于,所述启动电路包括第二整流电路;所述第二整流电路包括串联的第一二极管和第二二极管,以及串联的第三二极管和第四二极管;所述第一二极管和所述第三二极管的阴极与所述第一控制器相耦接;所述第二二极管和所述第四二极管的阳极均与接地端相耦接;所述无线充电接收装置还包括第一谐振电容;所述第一谐振电容的第一端与所述第二接收线圈的第一端相耦接,所述第一谐振电容的第二端与所述第一二极管的阳极和所述第二二极管的阴极相耦接;所述第二接收线圈的第二端与所述第三二极管的阳极和所述第四二极管的阴极相耦接。
- 根据权利要求18所述的无线充电接收装置,其特征在于,所述启动电路包括第二整流电路;所述第二整流电路包括串联的第一二极管和第二二极管;所述第一二极管的阴极与所述第一控制器相耦接;所述无线充电接收装置还包括第一谐振电容;所述第一谐振电容的第一端与所述第二接收线圈的第一端相耦接,所述第一谐振电容的第二端与所述第一二极管的阳极和所述第二二极管的阴极相耦接;所述第二接收线圈的第二端和所述第二二极管的阳极均与接地端相耦接。
- 根据权利要求18所述的无线充电接收装置,其特征在于,所述启动电路包括第二整流电路;所述第二整流电路包括串联的第一二极管和第二二极管;所述无线充电接收装置还包括串联的第一谐振电容和第二谐振电容;所述第一二极管的阴极和所述第一谐振电容的第一端与所述第一控制器相耦接;所述第二二极管的阳极和所述第二谐振电容的第二端均与接地端相耦接;所述第二接收线圈的第一端与所述第一二极管的阳极和所述第二二极管的阴极相耦接;所述第二接收线圈的第二端耦接于所述第一谐振电容的第二端和第二谐振电容的第一端之间。
- 根据权利要求25-27任一项所述的无线充电接收装置,其特征在于,所述启动电路还包括第二稳压电路;所述第二稳压电路与所述第二整流电路和所述第一控制器相耦接;所述第二稳压电路用于当所述供电电压小于所述第二稳压电路的预设稳压电压时,将所述第二整流电路输出的电压转换成所述第一电压;所述第二稳压电路还用于当所述供电电压大于所述第二稳压电路的预设稳压电压时,断开所述第二整流电路和所述第一控制器;所述第一控制器与所述第一整流电路的输出端相耦接;所述供电电压还用于为所述第一控制器供电。
- 根据权利要求25-27任一项所述的无线充电接收装置,其特征在于,所述启动电路还包括第二稳压电路;所述第二稳压电路与所述第二整流电路和所述第一控制器相耦接,所述第二稳压电路用于将所述第二整流电路输出的电压转换成所述第一电压。
- 一种无线充电接收装置的控制方法,其特征在于,所述无线充电接收装置包括第一通讯电路、第一控制器、第一整流电路以及第一接收线圈;所述第一通讯电路与所述第一控制器相耦接;所述第一整流电路与所述第一接收线圈、所述第一控制器以及电池相耦接;所述方法包括:所述第一通讯电路接收启动信号,所述无线充电接收装置启动;所述第一接收线圈接收交变磁场并输出第一感应电压;所述第一控制器输出第一整流控制信号,控制所述第一整流电路工作于半桥模式;所述第一通讯电路接收充电数据,所述充电数据用于指示充电类型;所述第一控制器根据所述充电数据识别出所述充电类型为第二充电类型,输出第二整流控制信号,控制所述第一整流电路工作于全桥模式;所述第一整流电路将所述第一感应电压转换成直流的供电电压;所述电池接收所述供电电压,并进行充电。
- 根据权利要求30所述的无线充电接收装置的控制方法,其特征在于,所述方法还包括:所述第一控制器发送第二调压指令;所述第二调压指令用于指示减小所述第一接收线圈的输入电压;所述第一控制器向所述第一整流电路输出所述第一整流控制信号,控制所述第一整流电路工作于所述半桥模式。
- 根据权利要求30或31所述的无线充电接收装置的控制方法,其特征在于,所述无线充电接收装置还包括第二接收线圈以及启动电路;所述第一接收线圈的电感量小于所述第二接收线圈的电感量;所述第一控制器输出第一整流控制信号之前,所述方法还包括:所述第二接收线圈接收交变磁场并输出第二感应电压;所述启动电路将所述第二感应电压转换成直流的第一电压,并传输至所述第一控制器;所述第一电压大于或等于所述第一控制器的最低工作电压。
- 根据权利要求30或31所述的无线充电接收装置的控制方法,其特征在于,所述无线充电接收装置还包括第一稳压电路;所述第一稳压电路与所述电池以及所述第一控制器相耦接;所述第一控制器输出第一整流控制信号之前,所述方法还包括:当所述供电电压小于所述第一稳压电路的预设稳压电压时,所述第一稳压电路将所述电池的电压传输至所述第一控制器;当所述供电电压大于所述第一稳压电路的预设稳压电压时,所述第一稳压电路断开所述电池和所述第一控制器;所述第一控制器接收所述供电电压。
- 根据权利要求30-33任一项所述的无线充电接收装置的控制方法,其特征在于,所述无线充电接收装置还包括电压转换电路;所述电压转换电路与所述第一整流电路和所述电池相耦接;所述电池接收所述供电电压之前,所述方法还包括:所述无线充电接收装置中的电压转换电路将所述供电电压进行转换,并使用转换后的电压为所述电池供电。
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