Wireless power receiver circuit, wireless charging system, electronic device, and charging method

Abstract

The present application provides a wireless power receiver circuit, a wireless charging system, an electronic device, and a charging method. By configuring a connection relationship between two bridge arms, a first switching unit, a second switching unit, and a DCDC converter, a cascaded relationship between the two bridge arms, the first switching unit, the second switching unit, and the DCDC converter is avoided. This allows the two bridge arms, the first and second switching units, and the DCDC converter to work together when processing an alternating current signal, resulting in the wireless power receiver circuit being a single-stage circuit solution, and any loss generated when a battery is charged being single-stage loss, thereby effectively reducing energy loss during charging and improving charging efficiency. Moreover, providing the two bridge arms, the first switching unit, and the second switching unit increases the variety of connection relationships between a plurality of capacitors, the power receiver, and the battery within each processing unit when a battery is being charged, causing the charging curve to be closer to the curve corresponding to the alternating current signal, and thereby further improving charging efficiency.

Description

Wireless power receiving circuit, wireless charging system, electronic device and charging method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on April 1, 2024, with application number 202410394195.6 and application name “Wireless power receiving circuit, wireless charging system, electronic device and charging method”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of electronic technology, and in particular to a wireless power receiving circuit, a wireless charging system, an electronic device, and a charging method. Background Art

[0004] As the charging power of electronic products continues to increase, wired and wireless charging solutions are taking up increasingly larger board areas. Limited board space complicates device layout. In high-power wireless charging scenarios, due to the use of a multi-stage cascade circuit solution, each circuit operates completely independently. This requires the addition of high-voltage, high-capacitor filtering at the output of both the bridge rectifier and the linear regulator. This results in a bloated wireless charging solution, low wireless charging efficiency, and high losses, impacting fast charging speeds and user experience. Improving charging efficiency, therefore, becomes a pressing issue. Summary of the Invention

[0005] The present application provides a wireless power receiving circuit, a wireless charging system, an electronic device, and a charging method for improving charging efficiency.

[0006] In a first aspect, an embodiment of the present application provides a wireless power receiving circuit, which may include: a power receiver, a first bridge arm, a second bridge arm, a first switch unit, a second switch unit, a DCDC (Direct Current Direct Current) converter, and a controller; the DCDC converter includes a first processing unit and a second processing unit; the power receiver is respectively connected to the bridge arm midpoint of the first bridge arm and the first switch unit, and the power receiver is also respectively connected to the bridge arm midpoint of the second bridge arm and the second switch unit, the power receiver is used to: in response to wireless power transmission, output an AC signal to the bridge arm midpoint of the first bridge arm, the bridge arm midpoint of the second bridge arm, the first switch unit, and the second switch unit; the first bridge arm is also respectively connected to the first input end, the ground end, and the controller of the first processing unit, and the second bridge arm is also respectively connected to the first input end, the ground end, and the controller of the second processing unit; the first switch unit is also connected to the second input end of the first processing unit, and the first input end of the first processing unit is different from the second input end of the first processing unit; the second switch unit is also connected to the second input end of the second processing unit, and the first input end of the second processing unit is different from the second input end of the second processing unit;

[0007] The positive half-cycle signal of the AC signal includes a first partial signal and a second partial signal, and the negative half-cycle signal of the AC signal includes a third partial signal and a fourth partial signal. The controller is used to: in response to the first partial signal in the positive half-cycle signal, control the first bridge arm and the second bridge arm to output the first partial signal to the first processing unit; in response to the second partial signal in the positive half-cycle signal, control the second bridge arm and the first switch unit to output the second partial signal to the first processing unit; in response to the third partial signal in the negative half-cycle signal, control the first bridge arm and the second bridge arm to output a first positive signal corresponding to the third partial signal to the second processing unit; in response to the fourth partial signal in the negative half-cycle signal, control the first bridge arm and the second switch unit to output a second positive signal corresponding to the fourth partial signal to the second processing unit;

[0008] The output end of the first processing unit is used to connect to the battery. Under the action of the first part of the signal, a first connection relationship is presented between the multiple capacitors, the power receiver and the battery in the first processing unit. Under the action of the second part of the signal, the multiple capacitors, the power receiver and the battery in the first processing unit are presented with a second connection relationship, and the first connection relationship and the second connection relationship are different; the output end of the second processing unit is used to connect to the battery. Under the action of the first positive signal, a third connection relationship is presented between the multiple capacitors, the power receiver and the battery in the second processing unit. Under the action of the second positive signal, a fourth connection relationship is presented between the multiple capacitors, the power receiver and the battery in the second processing unit. The third connection relationship and the fourth connection relationship are different.

[0009] That is to say, the AC signal includes a positive half-cycle signal and a negative half-cycle signal, and the positive half-cycle signal includes a first part signal and a second part signal, and the negative half-cycle signal includes a third part signal and a fourth part signal. At this time, the two bridge arms and the first switching unit are used in conjunction with each other to transmit the two parts of the positive half-cycle signal to the first processing unit respectively, so that the first processing unit charges the battery; and the two bridge arms and the second switching unit are used in conjunction with each other to process the two parts of the negative half-cycle signal respectively to obtain corresponding positive signals, and transmit these positive signals to the second processing unit respectively, so that the second processing unit charges the battery. In other words, the first processing unit can charge the battery based on the positive half-cycle signal under the action of the two bridge arms and the first switch unit, and the second processing unit can also charge the battery based on the positive signal corresponding to the negative half-cycle signal under the action of the two bridge arms and the second switch unit. Therefore, through the coordinated operation of the first processing unit, the second processing unit, the two bridge arms, the first switch unit, and the second switch unit, the battery can be charged based on the AC signal, so that the whole composed of the DCDC converter, the two bridge arms, the first switch unit, and the second switch unit can play the role of AC-DC conversion, and the DCDC converter, the two bridge arms, the first switch unit, and the second switch unit cooperate with each other during operation, and are not independent of each other. Therefore, the wireless power receiving circuit provided in the embodiment of the present application belongs to a single-stage circuit scheme, and the loss existing when charging the battery belongs to a single-stage loss. Compared with the multi-stage loss in the multi-stage circuit cascade scheme, it can effectively reduce the energy loss during charging and improve the charging efficiency of the battery.

[0010] In addition, the first switch unit and the first bridge arm are respectively connected to different input ends of the first processing unit, and the second switch unit and the second bridge arm are respectively connected to different input ends of the second processing unit, so that the first connection relationship and the second connection relationship are different, and the third connection relationship and the fourth connection relationship are different. When charging the battery, the types of connection relationships among multiple capacitors, power receivers and batteries in each processing unit can be increased, so that the charging curve is closer to the curve corresponding to the AC signal, thereby further improving the charging efficiency.

[0011] Optionally, the DCDC converter further includes a third switch unit and a fourth switch unit. The DCDC converter further includes a wired power input terminal. The third switch unit is respectively connected to the first input terminal of the first processing unit, the wired power input terminal, and the controller. The fourth switch unit is respectively connected to the first input terminal of the second processing unit, the wired power input terminal, and the controller. The controller is further configured to, in response to an AC signal, control the third switch unit to disconnect the wired power input terminal from the first input terminal of the first processing unit, and control the fourth switch unit to disconnect the wired power input terminal from the first input terminal of the second processing unit. The first bridge arm is further connected to the third switch unit, and the second bridge arm is further connected to the fourth switch unit. In this manner, the third and fourth switch units can control whether power input from the wired power input terminal is transmitted to the first and second processing units. Consequently, when wirelessly charging the battery, both the third and fourth switch units can be disconnected to prevent power input from the wired power input terminal from interfering with wireless charging, thereby improving the reliability and safety of wireless charging.

[0012] Optionally, the first bridge arm includes: a first bridge arm switch and a second bridge arm switch, the control electrode of the first bridge arm switch is connected to the controller, the first electrode of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second electrode of the second bridge arm switch, and the second electrode of the first bridge arm switch is connected to the first input end of the first processing unit; the control electrode of the second bridge arm switch is connected to the controller, the first electrode of the second bridge arm switch is connected to the ground end, and the second electrode of the second bridge arm switch is also connected to the positive electrode of the power receiver; the second bridge arm includes: a third bridge arm switch and a fourth bridge arm switch, the control electrode of the third bridge arm switch is connected to the controller, the first electrode of the third bridge arm switch is respectively connected to the negative electrode of the power receiver and the second electrode of the fourth bridge arm switch, and the third bridge arm switch The second pole of the fourth bridge arm switch is connected to the first input end of the second processing unit; the control pole of the fourth bridge arm switch is connected to the controller, the first pole of the fourth bridge arm switch is connected to the ground end, and the second pole of the fourth bridge arm switch is also connected to the negative pole of the power receiver; the controller is used to: in response to the first part of the signal, control the first bridge arm and the second bridge arm to switch between the first mode and the second mode; in response to the first positive signal, control the first bridge arm and the second bridge arm to switch between the first mode and the third mode; wherein the first mode includes: a mode in which the second bridge arm switch and the fourth bridge arm switch are both turned on, the second mode includes: a mode in which the first bridge arm switch and the fourth bridge arm switch are both turned on, and the third mode includes: a mode in which the second bridge arm switch and the third bridge arm switch are both turned on. In this way, by controlling the conduction state of each bridge arm switch, the switching of the first bridge arm and the second bridge arm between different modes can be controlled, so that the positive half-cycle signal in the AC signal and the positive signal corresponding to the negative half-cycle signal are transmitted to the first processing unit and the second processing unit respectively, so that the first processing unit and the second processing unit can charge the battery after processing the received signals, thereby realizing the coordinated work of each bridge arm and each processing unit and improving the charging efficiency of the battery.

[0013] Optionally, the first switch unit includes a first switch, a control electrode of the first switch connected to the controller, a first electrode of the first switch connected to the second input terminal of the first processing unit, and a second electrode of the first switch connected to the positive terminal of the power receiver; the second switch unit includes a second switch, a control electrode of the second switch connected to the controller, a first electrode of the second switch connected to the second input terminal of the second processing unit, and a second electrode of the second switch connected to the negative terminal of the power receiver; the controller is configured to: in response to the second partial signal, control the second bridge arm and the first switch unit to operate in a fourth mode; and in response to the second positive signal, control the first bridge arm and the second switch unit to operate in a fifth mode; wherein the fourth mode includes a mode in which both the fourth bridge arm switch and the first switch are conductive, and the fifth mode includes a mode in which both the second bridge arm switch and the second switch are conductive; the fourth mode exists between the first mode and the second mode, and the fifth mode exists between the first mode and the third mode. In this way, by controlling the first switch unit, the second switch unit, the first bridge arm, and the second bridge arm, a fourth mode and a fifth mode can be added. When the two bridge arms, the first switch unit, and the second switch unit are used in conjunction, the number of operating modes can be increased to five, which facilitates making the charging curve closer to the AC signal curve, thereby further improving charging efficiency.

[0014] Optionally, the configuration of the first processing unit and the second processing unit may include the following situations:

[0015] Case 1: The first processing unit includes: a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a first capacitor, a second capacitor, and a third capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the fourth switch, the first end of the first capacitor, and the first switch unit, and the second end of the third switch is respectively connected to the second end of the sixth switch and the first end of the second capacitor; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is connected to the ground end, and the second end of the fourth switch is also respectively connected to the first end of the first capacitor and the first switch unit; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the ninth switch and the first end of the third capacitor, and the second end of the fifth switch is respectively connected to the second end of the first capacitor and the first bridge arm; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is respectively connected to the second end of the seventh switch The first terminal of the ninth switch is connected to the battery, the first terminal of the ninth switch is connected to the battery, the second terminal of the ninth switch is connected to the battery, and the second terminal of the ninth switch is also connected to the first terminal of the third capacitor; the control terminal of the seventh switch is connected to the controller, the first terminal of the seventh switch is respectively connected to the second terminal of the eighth switch and the second terminal of the second capacitor, and the second terminal of the seventh switch is also connected to the battery; the control terminal of the eighth switch is connected to the controller, the first terminal of the eighth switch is connected to the ground terminal, and the second terminal of the eighth switch is also connected to the second terminal of the second capacitor; the control terminal of the ninth switch is connected to the controller, the first terminal of the ninth switch is also connected to the battery, and the second terminal of the ninth switch is also connected to the first terminal of the third capacitor; the control terminal of the tenth switch is connected to the controller, the first terminal of the tenth switch is respectively connected to the second terminal of the third capacitor and the second terminal of the eleventh switch, and the second terminal of the tenth switch is also connected to the battery; the control terminal of the eleventh switch is connected to the controller, the first terminal of the eleventh switch is connected to the ground terminal, and the second terminal of the eleventh switch is also connected to the second terminal of the third capacitor.

[0016] At this time, the controller is further configured to: in response to the positive half-cycle signal, control the first processing unit to switch between a first state, a second state, and a third state; wherein the first state includes: a state in which the fourth switch, the fifth switch, the sixth switch, the eighth switch, and the tenth switch are all on; the second state includes: a state in which the third switch, the sixth switch, the eighth switch, the ninth switch, and the eleventh switch are all on; and the third state includes: a state in which the third switch, the seventh switch, the ninth switch, and the eleventh switch are all on; the first mode includes the first state, the fourth mode includes the second state, and the second mode includes the first state, the second state, and the third state. In this manner, by switching the first processing unit between different states, the battery can be charged based on the positive half-cycle signal.

[0017] The second processing unit includes: a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a nineteenth switch, a twentieth switch, a fourth capacitor, a fifth capacitor and a sixth capacitor; the control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is respectively connected to the second end of the thirteenth switch, the first end of the fourth capacitor and the second switch unit, and the second end of the twelfth switch is respectively connected to the second end of the fifteenth switch and the first end of the fifth capacitor; the control end of the thirteenth switch is connected to the controller, the first end of the thirteenth switch is connected to the ground end, and the second end of the thirteenth switch is also respectively connected to the first end of the fourth capacitor and the second switch unit; the control end of the fourteenth switch is connected to the controller, the first end of the fourteenth switch is respectively connected to the second end of the eighteenth switch and the first end of the sixth capacitor, and the second end of the fourteenth switch is respectively connected to the second end of the fourth capacitor and the second bridge arm; the control end of the fifteenth switch is connected to the controller, the first end of the fifteenth switch is respectively connected to the first end of the sixteenth switch The first terminal of the first switch is connected to the second terminal of the first capacitor, the second terminal of the second capacitor, the second terminal of the eighth switch, and the second terminal of the ninth switch, and the second terminal of the fifteenth switch is also connected to the first terminal of the fifth capacitor; the control terminal of the sixteenth switch is connected to the controller, the first terminal of the sixteenth switch is respectively connected to the second terminal of the seventeenth switch and the second terminal of the fifth capacitor, and the second terminal of the sixteenth switch is also connected to the battery; the control terminal of the seventeenth switch is connected to the controller, the first terminal of the seventeenth switch is connected to the ground terminal, and the second terminal of the seventeenth switch is also connected to the second terminal of the fifth capacitor; the control terminal of the eighteenth switch is connected to the controller, the first terminal of the eighteenth switch is also connected to the battery, and the second terminal of the eighteenth switch is also connected to the first terminal of the sixth capacitor; the control terminal of the nineteenth switch is connected to the controller, the first terminal of the nineteenth switch is respectively connected to the second terminal of the sixth capacitor and the second terminal of the twentieth switch, and the second terminal of the nineteenth switch is also connected to the battery; the control terminal of the twentieth switch is connected to the controller, the first terminal of the twentieth switch is connected to the ground terminal, and the second terminal of the twentieth switch is also connected to the second terminal of the sixth capacitor.

[0018] At this time, the controller is further configured to: in response to the first positive signal and the second positive signal, control the second processing unit to switch between a fourth state, a fifth state, and a sixth state; wherein the fourth state includes a state in which the thirteenth, fourteenth, fifteenth, seventeenth, and nineteenth switches are all on; the fifth state includes a state in which the twelfth, fifteenth, seventeenth, eighteenth, and twentieth switches are all on; and the sixth state includes a state in which the twelfth, sixteenth, eighteenth, and twentieth switches are all on; the first mode includes the fourth state, the fifth mode includes the fifth state, and the third mode includes the fourth, fifth, and sixth states. In this manner, by switching the second processing unit between different states, the battery can be charged based on the first positive signal and the second positive signal.

[0019] Case 2: The first processing unit includes: a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a first capacitor, and a second capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the fourth switch, the first end of the first capacitor, and the first switch unit, and the second end of the third switch is respectively connected to the first end of the sixth switch, the second end of the seventh switch, and the battery; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is connected to the ground end, and the second end of the fourth switch is also respectively connected to the first end of the first capacitor and the first switch unit; the control end of the fifth switch is connected to the controller, and the fifth switch The first end of the switch is respectively connected to the second end of the sixth switch and the first end of the second capacitor, and the second end of the fifth switch is respectively connected to the second end of the first capacitor and the first bridge arm; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is also connected to the battery, and the second end of the sixth switch is also connected to the first end of the second capacitor; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is respectively connected to the second end of the eighth switch and the second end of the second capacitor, and the second end of the seventh switch is also connected to the battery; the control end of the eighth switch is connected to the controller, the first end of the eighth switch is connected to the ground terminal, and the second end of the eighth switch is also connected to the second end of the second capacitor.

[0020] At this time, the controller is further configured to: in response to the positive half-cycle signal, control the first processing unit to switch between a first state, a second state, and a third state; wherein the first state includes a state in which the fourth switch, the sixth switch, and the eighth switch are all on; the second state includes a state in which the fourth switch, the fifth switch, and the seventh switch are all on; and the third state includes a state in which the third switch, the sixth switch, and the eighth switch are all on; the first mode includes the first state, the fourth mode includes the first state, and the second mode includes the second state and the third state. In this manner, by switching the first processing unit between different states, the battery can be charged based on the positive half-cycle signal.

[0021] The second processing unit includes: a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a third capacitor, and a fourth capacitor; the control end of the ninth switch is connected to the controller, the first end of the ninth switch is respectively connected to the second end of the tenth switch, the first end of the third capacitor, and the second switch unit, and the second end of the ninth switch is respectively connected to the first end of the twelfth switch, the second end of the thirteenth switch, and the battery; the control end of the tenth switch is connected to the controller, the first end of the tenth switch is connected to the ground end, and the second end of the tenth switch is also respectively connected to the first end of the third capacitor and the second switch unit; the control end of the eleventh switch is connected to the controller, the first end of the eleventh switch is connected to the ground end, and the second end of the tenth switch is also respectively connected to the first end of the third capacitor and the second switch unit; The first and second ends of the 13th switch are connected to the second end of the 14th switch and the second end of the fourth capacitor, respectively, and the second end of the 13th switch is connected to the second end of the 14th switch and the second end of the fourth capacitor, respectively. The second end of the 14th switch is connected to the second end of the 14th switch and the second end of the fourth capacitor, respectively. The second end of the 14th switch is connected to the battery, and the second end of the 14th switch is connected to the battery. The control end of the 14th switch is connected to the controller, the first end of the 14th switch is connected to the ground terminal, and the second end of the 14th switch is also connected to the second end of the fourth capacitor.

[0022] At this time, the controller is further configured to control the second processing unit to switch between a fourth state, a fifth state, and a sixth state in response to the first positive signal and the second positive signal; wherein the fourth state includes a state in which the tenth switch, the twelfth switch, and the fourteenth switch are all on; the fifth state includes a state in which the tenth switch, the eleventh switch, and the thirteenth switch are all on; and the sixth state includes a state in which the ninth switch, the twelfth switch, and the fourteenth switch are all on; the first mode includes the fourth state, the fifth mode includes the fourth state, and the third mode includes the fifth state and the sixth state. In this manner, by switching the second processing unit between different states, the battery can be charged based on the first positive signal and the second positive signal.

[0023] It should be understood that in this application, each switch and each arm switch can be, but is not limited to, a switching device having a control terminal, such as a field-effect transistor or a triode. The specific design can be based on actual needs and is not specifically limited here. For example, in the case where the switch and arm switch are field-effect transistors, the control terminal serves as the gate, the first terminal serves as the source, and the second terminal serves as the drain.

[0024] In a second aspect, an embodiment of the present application provides another wireless power receiving circuit, which may include: a power receiver, a first bridge arm, a second bridge arm, a DCDC converter and a controller; the DCDC converter includes a processing unit; the power receiver is connected to the midpoint of the first bridge arm, and the power receiver is also connected to the midpoint of the second bridge arm, and the power receiver is used to: in response to wireless transmission of electric energy, output an AC signal to the midpoint of the first bridge arm and the midpoint of the second bridge arm; the first bridge arm is also connected to the processing unit, the ground end, and the controller respectively, and the second bridge arm is also connected to the processing unit, the ground end, and the controller respectively, and the first bridge arm and the second bridge arm are both connected to the same input end of the processing unit; the controller is used to: in response to the AC signal, control the first bridge arm and the second bridge arm to output the positive signal corresponding to the positive half-cycle signal in the AC signal and the negative half-cycle signal in the AC signal to the processing unit in sequence; the output end of the processing unit is used to be connected to the battery, and the processing unit is used to: charge the battery in response to the positive half-cycle signal of the AC signal, and charge the battery in response to the positive signal.

[0025] That is, the AC signal includes a positive half-cycle signal and a negative half-cycle signal. The two bridge arms can transmit the positive half-cycle signal and the negative half-cycle signal to the processing unit, respectively, so that the processing unit charges the battery. In other words, the processing unit can charge the battery based on the positive half-cycle signal and the positive signal corresponding to the negative half-cycle signal under the action of the two bridge arms. Therefore, through the coordinated operation of the processing unit and the two bridge arms, the battery can be charged based on the AC signal, so that the DCDC converter and the two bridge arms can play the role of AC-DC conversion. Moreover, the DCDC converter and the two bridge arms cooperate with each other during operation and are not independent of each other. Therefore, the wireless power receiving circuit provided in the embodiment of the present application is a single-stage circuit solution, and the loss existing when charging the battery is a single-stage loss. Compared with the multi-stage loss in the multi-stage circuit cascade solution, it can effectively reduce the energy loss during charging and improve the charging efficiency of the battery.

[0026] Furthermore, since both the first bridge arm and the second bridge arm are connected to the same input terminal of the processing unit, the positive half-cycle signal and the negative half-cycle signal can be transmitted to the same processing unit through the two bridge arms. This allows the processing unit to process both the positive half-cycle signal and the negative half-cycle signal, thereby achieving the purpose of processing different signals by the same processing unit. This not only improves the charging efficiency of the battery, but also simplifies the structure of the DCDC converter, thereby reducing the manufacturing cost of the wireless power receiving circuit.

[0027] Optionally, the DCDC converter further includes a switch unit and a wired power input terminal, wherein the switch unit is respectively connected to the processing unit, the wired power input terminal, and the controller, and the switch unit, the first bridge arm, and the second bridge arm are all connected to the same input terminal of the processing unit. The controller is further configured to control the switch unit to disconnect the wired power input terminal from the processing unit in response to an AC signal. In this manner, the switch unit can control whether power input from the wired power input terminal is transmitted to the processing unit. Furthermore, when wirelessly charging the battery, the switch unit can be disconnected to prevent power input from the wired power input terminal from interfering with wireless charging, thereby improving the reliability and safety of wireless charging.

[0028] Optionally, the first bridge arm includes: a first bridge arm switch and a second bridge arm switch, the control electrode of the first bridge arm switch is connected to the controller, the first electrode of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second electrode of the second bridge arm switch, and the second electrode of the first bridge arm switch is connected to the processing unit; the control electrode of the second bridge arm switch is connected to the controller, the first electrode of the second bridge arm switch is connected to the ground end, and the second electrode of the second bridge arm switch is also connected to the positive electrode of the power receiver; the second bridge arm includes: a third bridge arm switch and a fourth bridge arm switch, the control electrode of the third bridge arm switch is connected to the controller, the first electrode of the third bridge arm switch is respectively connected to the negative electrode of the power receiver and the second electrode of the fourth bridge arm switch, and the third bridge arm switch The second electrode of the switch is connected to the processing unit; the control electrode of the fourth bridge arm switch is connected to the controller, the first electrode of the fourth bridge arm switch is connected to the ground terminal, and the second electrode of the fourth bridge arm switch is also connected to the negative electrode of the power receiver. The controller is configured to: in response to the positive half-cycle signal, control the first bridge arm and the second bridge arm to switch between the first mode and the second mode; in response to the positive signal, control the first bridge arm and the second bridge arm to switch between the first mode and the third mode. The first mode includes a mode in which the second bridge arm switch and the fourth bridge arm switch are both turned on, the second mode includes a mode in which the first bridge arm switch and the fourth bridge arm switch are both turned on, and the third mode includes a mode in which the second bridge arm switch and the third bridge arm switch are both turned on. In this way, by controlling the conduction state of each bridge arm switch, the switching of the first bridge arm and the second bridge arm between different modes can be controlled, thereby sequentially transmitting the positive half-cycle signal and the positive signal corresponding to the negative half-cycle signal in the AC signal to the processing unit, so that the processing unit can process the received signals in sequence and charge the battery, thereby achieving coordinated operation between each bridge arm and the processing unit and improving the charging efficiency of the battery.

[0029] Optionally, the processing unit may be configured in the following ways:

[0030] Case 1: The processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a first capacitor, a second capacitor and a third capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the seventh switch and the first end of the third capacitor, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm and the second bridge arm; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is respectively connected to the second end of the fifth switch, the battery, The first end of the seventh switch is connected to the second end of the eighth switch, and the second end of the fourth switch is also connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the second end of the second capacitor, and the second end of the fifth switch is also connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground terminal, and the second end of the sixth switch is also connected to the second end of the second capacitor; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is also connected to the battery, and the second end of the seventh switch is also connected to the first end of the third capacitor; the control end of the eighth switch is connected to the controller, the first end of the eighth switch is respectively connected to the second end of the third capacitor and the second end of the ninth switch, and the second end of the eighth switch is also connected to the battery; the control end of the ninth switch is connected to the controller, the first end of the ninth switch is connected to the ground terminal, and the second end of the ninth switch is also connected to the second end of the third capacitor.

[0031] At this time, the controller is further configured to: in response to a positive half-cycle signal, control the processing unit to switch between a first state, a second state, and a third state; in response to a positive signal, control the processing unit to switch between a first state, a second state, and a third state; wherein the first state includes: a state in which the second switch, the third switch, the fourth switch, the sixth switch, and the eighth switch are all on; the second state includes: a state in which the first switch, the fourth switch, the sixth switch, the seventh switch, and the ninth switch are all on; the third state includes: a state in which the first switch, the fifth switch, the seventh switch, and the ninth switch are all on; the first mode includes the first state, and the second mode and the third mode both include: the first state, the second state, and the third state. In this way, by switching the processing unit between different states, the battery can be charged based on the positive half-cycle signal and the positive signal, respectively.

[0032] Case 2: The processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor, and a second capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground terminal, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the first end of the fourth switch, the second end of the fifth switch, and the battery, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is also connected to the battery, and the second end of the fourth switch is also connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the second end of the second capacitor, and the second end of the fifth switch is also connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground terminal, and the second end of the sixth switch is also connected to the second end of the second capacitor.

[0033] At this time, the controller is further configured to: in response to a positive half-cycle signal, control the processing unit to switch between a first state, a second state, and a third state; in response to a positive signal, control the processing unit to switch between a first state, a second state, and a third state; wherein the first state includes: a state in which the second switch, the third switch, the fourth switch, and the sixth switch are all on; the second state includes: a state in which the first switch, the fourth switch, and the sixth switch are all on; the third state includes: a state in which the first switch and the fifth switch are all on; the first mode includes the first state, and the second mode and the third mode both include: the first state, the second state, and the third state. In this way, by switching the processing unit between different states, the battery can be charged based on the positive half-cycle signal and the positive signal, respectively.

[0034] Case 3: The processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor, and a second capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the first end of the fourth switch, the second end of the fifth switch, and the battery; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is also connected to the battery, and the second end of the fourth switch is also connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the second end of the second capacitor, and the second end of the fifth switch is also connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground, and the second end of the sixth switch is also connected to the second end of the second capacitor.

[0035] At this time, the controller is further configured to: in response to a positive half-cycle signal, control the processing unit to switch between a first state, a second state, and a third state; in response to a positive signal, control the processing unit to switch between a first state, a second state, and a third state; wherein the first state includes: a state in which the second switch, the fourth switch, and the sixth switch are all on; the second state includes: a state in which the second switch, the third switch, and the fifth switch are all on; and the third state includes: a state in which the first switch, the fourth switch, and the sixth switch are all on; the first mode includes the first state, and the second mode and the third mode both include: the second state and the third state. In this way, by switching the processing unit between different states, the battery can be charged based on the positive half-cycle signal and the positive signal, respectively.

[0036] It should be understood that in this application, each switch and each arm switch can be, but is not limited to, a switching device having a control terminal, such as a field-effect transistor or a triode. The specific design can be based on actual needs and is not specifically limited here. For example, in the case where the switch and arm switch are field-effect transistors, the control terminal serves as the gate, the first terminal serves as the source, and the second terminal serves as the drain.

[0037] In a third aspect, an embodiment of the present application further provides a wireless charging system, which may include: a charging device and at least one power receiving device, the power receiving device including: a battery, and a wireless power receiving circuit as described in the first aspect and any one of the embodiments of the first aspect above or as described in the second aspect and any one of the embodiments of the second aspect above; the charging device is used to: provide electromagnetic waves to the wireless power receiving circuit; the wireless power receiving circuit is used to: use electromagnetic waves to charge the battery, thereby improving the efficiency of the wireless charging system in charging the battery.

[0038] It should be understood that since the principle of solving the problem of the wireless charging system is similar to the principle of solving the problem of the aforementioned wireless power receiving circuit, the implementation and technical effects of the wireless charging system can refer to the implementation and technical effects of the aforementioned wireless power receiving circuit, and the repeated parts will not be repeated.

[0039] In a fourth aspect, an embodiment of the present application further provides an electronic device, which may include: a wireless power receiving circuit and a battery as described in the above-mentioned first aspect and any one of the embodiments of the first aspect, or as described in the above-mentioned second aspect and any one of the embodiments of the second aspect, wherein the wireless power receiving circuit is connected to the battery, thereby improving the charging efficiency of the electronic device.

[0040] It should be understood that since the principle of solving the problem by the electronic device is similar to the principle of solving the problem by the aforementioned wireless power receiving circuit, the implementation and technical effects of the electronic device can refer to the implementation and technical effects of the aforementioned wireless power receiving circuit, and the repeated parts will not be repeated.

[0041] In a fifth aspect, an embodiment of the present application further provides a charging method, which is used to charge using the wireless power receiving circuit described in the first aspect and any one of the embodiments of the first aspect. The charging method may include: the power receiver outputting an AC signal to the midpoint of the first bridge arm, the midpoint of the second bridge arm, the first switch unit, and the second switch unit in response to wireless transmission of electric energy; the controller controlling the first bridge arm and the second bridge arm to output the first partial signal to the first processing unit in response to a first partial signal in the positive half-cycle signal of the AC signal, and controlling the second bridge arm and the first switch unit to output the second partial signal to the first processing unit in response to a second partial signal in the positive half-cycle signal, so that the first processing unit charges the battery according to the first partial signal and the second partial signal; the controller controlling the first bridge arm and the second bridge arm to output a first positive signal corresponding to the third partial signal to the second processing unit in response to a third partial signal in the negative half-cycle signal of the AC signal, and controlling the first bridge arm and the second switch unit to output a second positive signal corresponding to the fourth partial signal to the second processing unit in response to a fourth partial signal in the negative half-cycle signal, so that the second processing unit charges the battery according to the first positive signal and the second positive signal;

[0042] Among them, the first bridge arm is also respectively connected to the first input end, the ground end, and the controller of the first processing unit, and the second bridge arm is also respectively connected to the first input end, the ground end, and the controller of the second processing unit; the first switch unit is also connected to the second input end of the first processing unit, and the first input end of the first processing unit is different from the second input end of the first processing unit; the second switch unit is also connected to the second input end of the second processing unit, and the first input end of the second processing unit is different from the second input end of the second processing unit; under the action of the first part of the signal, a first connection relationship is presented between the multiple capacitors, the power receiver and the battery in the first processing unit, and under the action of the second part of the signal, a second connection relationship is presented between the multiple capacitors, the power receiver and the battery in the first processing unit, and the first connection relationship is different from the second connection relationship; under the action of the first positive signal, a third connection relationship is presented between the multiple capacitors, the power receiver and the battery in the second processing unit, and under the action of the second positive signal, a fourth connection relationship is presented between the multiple capacitors, the power receiver and the battery in the second processing unit, and the third connection relationship is different from the fourth connection relationship.

[0043] In this way, the losses experienced during battery charging are single-stage losses, effectively reducing energy losses during charging and improving battery charging efficiency compared to multi-stage losses in a multi-stage circuit cascade solution. Furthermore, the first switch unit and the first bridge arm are connected to different input terminals of the first processing unit, while the second switch unit and the second bridge arm are connected to different input terminals of the second processing unit. This allows the first connection relationship to be different from the second connection relationship, and the third connection relationship to be different from the fourth connection relationship. When charging the battery, the variety of connection relationships between multiple capacitors, power receivers, and batteries in each processing unit can be increased, making the charging curve more similar to the curve corresponding to the AC signal, thereby further improving charging efficiency.

[0044] Optionally, in response to the first part of the signal in the positive half-cycle signal, the first bridge arm and the second bridge arm are controlled to output the first part of the signal to the first processing unit, including: in response to the first part of the signal, the first bridge arm and the second bridge arm are controlled to switch between the first mode and the second mode; in response to the third part of the signal in the negative half-cycle signal, the first bridge arm and the second bridge arm are controlled to output the first positive signal corresponding to the third part of the signal to the second processing unit, including: in response to the first positive signal, the first bridge arm and the second bridge arm are controlled to switch between the first mode and the third mode; wherein the first bridge arm includes: a first bridge arm switch and a second bridge arm switch, the control electrode of the first bridge arm switch is connected to the controller, the first electrode of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second electrode of the second bridge arm switch, and the second electrode of the first bridge arm switch is connected to the first input end of the first processing unit; the second bridge arm The control electrode of the switch is connected to the controller, the first electrode of the second bridge arm switch is connected to the ground end, and the second electrode of the second bridge arm switch is also connected to the positive electrode of the power receiver; the second bridge arm includes: a third bridge arm switch and a fourth bridge arm switch, the control electrode of the third bridge arm switch is connected to the controller, the first electrode of the third bridge arm switch is respectively connected to the negative electrode of the power receiver and the second electrode of the fourth bridge arm switch, and the second electrode of the third bridge arm switch is connected to the first input end of the second processing unit; the control electrode of the fourth bridge arm switch is connected to the controller, the first electrode of the fourth bridge arm switch is connected to the ground end, and the second electrode of the fourth bridge arm switch is also connected to the negative electrode of the power receiver; the first mode includes: a mode in which the second bridge arm switch and the fourth bridge arm switch are both turned on, the second mode includes: a mode in which the first bridge arm switch and the fourth bridge arm switch are both turned on, and the third mode includes: a mode in which the second bridge arm switch and the third bridge arm switch are both turned on.

[0045] In this way, by controlling the conduction state of each bridge arm switch, the switching of the first bridge arm and the second bridge arm between different modes can be controlled, so that the positive half-cycle signal in the AC signal and the positive signal corresponding to the negative half-cycle signal are transmitted to the first processing unit and the second processing unit respectively, so that the first processing unit and the second processing unit can charge the battery after processing the received signals, thereby realizing the coordinated work of each bridge arm and each processing unit and improving the charging efficiency of the battery.

[0046] Optionally, in response to the second part of the signal in the positive half-cycle signal, controlling the second bridge arm and the first switch unit to output the second part of the signal to the first processing unit includes: in response to the second part of the signal, controlling the second bridge arm and the first switch unit to be in the fourth mode; in response to the fourth part of the signal in the negative half-cycle signal, controlling the first bridge arm and the second switch unit to output the second positive signal corresponding to the fourth part of the signal to the second processing unit, including: in response to the second positive signal, controlling the first bridge arm and the second switch unit to be in the fifth mode; wherein the first switch unit includes a first switch, the control electrode of the first switch is connected to the controller, the first electrode of the first switch is connected to the second input end of the first processing unit, and the second electrode of the first switch is connected to the positive electrode of the power receiver; the second switch unit includes a second switch, the control electrode of the second switch is connected to the controller, the first electrode of the second switch is connected to the second input end of the second processing unit, and the second electrode of the second switch is connected to the negative electrode of the power receiver; the fourth mode includes: a mode in which the fourth bridge arm switch and the first switch are both turned on, and the fifth mode includes: a mode in which the second bridge arm switch and the second switch are both turned on; the fourth mode exists between the first mode and the second mode, and the fifth mode exists between the first mode and the third mode.

[0047] In this way, by controlling the first switch unit, the second switch unit, the first bridge arm and the second bridge arm, the fourth mode and the fifth mode can be added, so that when the two bridge arms, the first switch unit and the second switch unit are used in combination, the working modes can be increased to five, which is conducive to making the charging curve closer to the AC signal curve, thereby further improving the charging efficiency.

[0048] Optionally, charging the battery according to the first and second partial signals includes: the controller controls the first processing unit to switch between the first state, the second state, and the third state in response to the first and second partial signals; wherein the first processing unit includes: a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a first capacitor, a second capacitor, and a third capacitor; a control end of the third switch is connected to the controller, a first end of the third switch is respectively connected to the second end of the fourth switch, the first end of the first capacitor, and the first switch unit, and a second end of the third switch is respectively connected to the second end of the sixth switch. The first end of the fourth switch is connected to the first end of the first capacitor and the first switch unit; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the second end of the ninth switch and the first end of the third capacitor, and the second end of the fifth switch is connected to the second end of the first capacitor and the first bridge arm; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the second end of the seventh switch, the battery, the first end of the ninth switch, and the second end of the tenth switch, and the second end of the sixth switch is also connected to the first end of the second capacitor. The control end of the seventh switch is connected to the controller, the first end of the seventh switch is respectively connected to the second end of the eighth switch and the second end of the second capacitor, and the second end of the seventh switch is also connected to the battery; the control end of the eighth switch is connected to the controller, the first end of the eighth switch is connected to the ground terminal, and the second end of the eighth switch is also connected to the second end of the second capacitor; the control end of the ninth switch is connected to the controller, the first end of the ninth switch is also connected to the battery, and the second end of the ninth switch is also connected to the first end of the third capacitor; the control end of the tenth switch is connected to the controller, the first end of the tenth switch is respectively connected to the second end of the third capacitor and the second end of the eleventh switch, and the tenth switch The second end of the 11th switch is also connected to the battery; the control end of the 11th switch is connected to the controller, the first end of the 11th switch is connected to the ground end, and the second end of the 11th switch is also connected to the second end of the third capacitor; the first state includes: a state in which the fourth switch, the fifth switch, the sixth switch, the eighth switch, and the tenth switch are all on; the second state includes: a state in which the third switch, the sixth switch, the eighth switch, the ninth switch, and the eleventh switch are all on; the third state includes: a state in which the third switch, the seventh switch, the ninth switch, and the eleventh switch are all on; the first mode includes the first state, the fourth mode includes the second state, and the second mode includes the first state, the second state, and the third state. In this way, by switching the first processing unit between different states, the battery can be charged based on the positive half-cycle signal.

[0049] Optionally, charging the battery according to the first positive signal and the second positive signal includes: the controller controls the second processing unit to switch between the fourth state, the fifth state, and the sixth state in response to the first positive signal and the second positive signal; wherein the second processing unit includes: a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a nineteenth switch, a twentieth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; a control end of the twelfth switch is connected to the controller, a first end of the twelfth switch is respectively connected to the second end of the thirteenth switch, the first end of the fourth capacitor, and the second switch unit, and a second end of the twelfth switch is respectively connected to the second end of the fifteenth switch. The first end of the thirteenth switch is connected to the controller, the first end of the thirteenth switch is connected to the ground end, and the second end of the thirteenth switch is also connected to the first end of the fourth capacitor and the second switch unit respectively; the control end of the fourteenth switch is connected to the controller, the first end of the fourteenth switch is respectively connected to the second end of the eighteenth switch and the first end of the sixth capacitor, and the second end of the fourteenth switch is respectively connected to the second end of the fourth capacitor and the second bridge arm; the control end of the fifteenth switch is connected to the controller, the first end of the fifteenth switch is respectively connected to the second end of the sixteenth switch, the battery, the first end of the eighteenth switch, and the second end of the nineteenth switch, and the second end of the fifteenth switch is also connected to the fifth capacitor. The first end of the sixth capacitor is connected to the control terminal of the first switch; the control terminal of the sixteenth switch is connected to the controller, the first end of the sixteenth switch is respectively connected to the second end of the seventeenth switch and the second end of the fifth capacitor, and the second end of the sixteenth switch is also connected to the battery; the control terminal of the seventeenth switch is connected to the controller, the first end of the seventeenth switch is connected to the ground terminal, and the second end of the seventeenth switch is also connected to the second end of the fifth capacitor; the control terminal of the eighteenth switch is connected to the controller, the first end of the eighteenth switch is also connected to the battery, and the second end of the eighteenth switch is also connected to the first end of the sixth capacitor; the control terminal of the nineteenth switch is connected to the controller, the first end of the nineteenth switch is respectively connected to the second end of the sixth capacitor and the second end of the twentieth switch, and the nineteenth switch The second end of the switch is also connected to the battery; the control end of the twentieth switch is connected to the controller, the first end of the twentieth switch is connected to the ground end, and the second end of the twentieth switch is also connected to the second end of the sixth capacitor; the fourth state includes: the state in which the thirteenth switch, the fourteenth switch, the fifteenth switch, the seventeenth switch, the seventeenth switch, the eighteenth switch, and the twentieth switch are all turned on; the sixth state includes: the state in which the twelfth switch, the fifteenth switch, the seventeenth switch, the eighteenth switch, and the twentieth switch are all turned on; the first mode includes the fourth state, the fifth mode includes the fifth state, and the third mode includes the fourth state, the fifth state, and the sixth state. In this way, by switching between different states by the second processing unit, the battery can be charged based on the first positive signal and the second positive signal.

[0050] Optionally, charging the battery according to the first and second partial signals includes: a controller controlling the first processing unit to switch between the first state, the second state, and the third state in response to the positive half-cycle signal; wherein the first processing unit includes: a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a first capacitor, and a second capacitor; a control end of the third switch is connected to the controller, a first end of the third switch is respectively connected to the second end of the fourth switch, the first end of the first capacitor, and the first switch unit, and a second end of the third switch is respectively connected to the first end of the sixth switch, the second end of the seventh switch, and the battery; a control end of the fourth switch is connected to the controller, a first end of the fourth switch is connected to the ground terminal, and a second end of the fourth switch is also respectively connected to the first end of the first capacitor and the first switch unit; a control end of the fifth switch is connected to the controller, and a first end of the fifth switch is respectively connected to the second end of the sixth switch and the first end of the second capacitor. The second end of the fifth switch is connected to the second end of the first capacitor and the first bridge arm respectively; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is also connected to the battery, and the second end of the sixth switch is also connected to the first end of the second capacitor; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is respectively connected to the second end of the eighth switch and the second end of the second capacitor, and the second end of the seventh switch is also connected to the battery; the control end of the eighth switch is connected to the controller, the first end of the eighth switch is connected to the ground terminal, and the second end of the eighth switch is also connected to the second end of the second capacitor; the first state includes: a state in which the fourth switch, the sixth switch, and the eighth switch are all turned on; the second state includes: a state in which the fourth switch, the fifth switch, and the seventh switch are all turned on; the third state includes: a state in which the third switch, the sixth switch, and the eighth switch are all turned on; the first mode includes the first state, the fourth mode includes the first state, and the second mode includes the second state and the third state. In this way, by switching between different states by the first processing unit, the battery can be charged based on the positive half-cycle signal.

[0051] Optionally, charging the battery according to the first positive signal and the second positive signal includes: the controller controlling the second processing unit to switch between the fourth state, the fifth state, and the sixth state in response to the first positive signal and the second positive signal; wherein the second processing unit includes: a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a third capacitor, and a fourth capacitor; a control end of the ninth switch is connected to the controller, a first end of the ninth switch is respectively connected to the second end of the tenth switch, the first end of the third capacitor, and the second switch unit, and a second end of the ninth switch is respectively connected to the first end of the twelfth switch, the second end of the thirteenth switch, and the battery; a control end of the tenth switch is connected to the controller, a first end of the tenth switch is connected to the ground terminal, and a second end of the tenth switch is further respectively connected to the first end of the third capacitor and the second switch unit; a control end of the eleventh switch is connected to the controller, and a first end of the eleventh switch is respectively connected to the second end of the twelfth switch and the first end of the fourth capacitor. The second end of the eleventh switch is connected to the second end of the third capacitor and the second bridge arm respectively; the control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is also connected to the battery, and the second end of the twelfth switch is also connected to the first end of the fourth capacitor; the control end of the thirteenth switch is connected to the controller, the first end of the thirteenth switch is respectively connected to the second end of the fourteenth switch and the second end of the fourth capacitor, and the second end of the thirteenth switch is also connected to the battery; the control end of the fourteenth switch is connected to the controller, the first end of the fourteenth switch is connected to the ground terminal, and the second end of the fourteenth switch is also connected to the second end of the fourth capacitor; the fourth state includes: a state in which the tenth switch, the twelfth switch, and the fourteenth switch are all turned on; the fifth state includes: a state in which the tenth switch, the eleventh switch, and the thirteenth switch are all turned on; the sixth state includes: a state in which the ninth switch, the twelfth switch, and the fourteenth switch are all turned on; the first mode includes the fourth state, the fifth mode includes the fourth state, and the third mode includes the fifth state and the sixth state. In this way, by switching between different states by the second processing unit, the battery can be charged based on the first positive signal and the second positive signal.

[0052] It should be understood that since the principle of solving the problem by the charging method is similar to the principle of solving the problem by the aforementioned wireless power receiving circuit, the implementation and technical effects of the charging method can refer to the implementation and technical effects of the aforementioned wireless power receiving circuit, and the repeated parts will not be repeated.

[0053] In a sixth aspect, an embodiment of the present application further provides a charging method, which is used to charge using a wireless power receiving circuit as described in the second aspect and any one of the embodiments of the second aspect. The charging method may include: the power receiver outputs an AC signal to the midpoint of the first bridge arm and the midpoint of the second bridge arm in response to the wireless transmission of electric energy; the controller responds to the AC signal and controls the first bridge arm and the second bridge arm to output the positive signal corresponding to the positive half-cycle signal in the AC signal and the negative half-cycle signal in the AC signal to the processing unit in sequence, so that the processing unit charges the battery according to the positive half-cycle signal and the positive signal in sequence; wherein the first bridge arm and the second bridge arm are both connected to the same input terminal of the processing unit.

[0054] In this way, the losses experienced during battery charging are single-stage losses, effectively reducing energy losses during charging and improving battery charging efficiency compared to multi-stage losses in a multi-stage cascade circuit solution. Furthermore, because both the first and second bridge arms are connected to the same input terminal of the processing unit, both positive and negative half-cycle signals can be transmitted to the same processing unit via the two bridge arms. This allows the processing unit to process both positive and negative half-cycle signals, achieving the goal of processing different signals with the same processing unit. This not only improves battery charging efficiency but also simplifies the structure of the DCDC converter, thereby reducing the manufacturing cost of the wireless power receiving circuit.

[0055] Optionally, in response to an AC signal, the first bridge arm and the second bridge arm are controlled to output the positive half-cycle signal in the AC signal and the positive signal corresponding to the negative half-cycle signal in the AC signal to the processing unit in sequence, including: in response to the positive half-cycle signal, the first bridge arm and the second bridge arm are controlled to switch between the first mode and the second mode; in response to the positive signal, the first bridge arm and the second bridge arm are controlled to switch between the first mode and the third mode; wherein the first bridge arm includes: a first bridge arm switch and a second bridge arm switch, the control electrode of the first bridge arm switch is connected to the controller, the first electrode of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second electrode of the second bridge arm switch, and the second electrode of the first bridge arm switch is connected to the processing unit; the control electrode of the second bridge arm switch is connected to the controller, and the first electrode of the second bridge arm switch is connected to the processing unit. One pole is connected to the ground end, and the second pole of the second bridge arm switch is also connected to the positive pole of the power receiver; the second bridge arm includes: a third bridge arm switch and a fourth bridge arm switch, the control pole of the third bridge arm switch is connected to the controller, the first pole of the third bridge arm switch is respectively connected to the negative pole of the power receiver and the second pole of the fourth bridge arm switch, and the second pole of the third bridge arm switch is connected to the processing unit; the control pole of the fourth bridge arm switch is connected to the controller, the first pole of the fourth bridge arm switch is connected to the ground end, and the second pole of the fourth bridge arm switch is also connected to the negative pole of the power receiver; the first mode includes: a mode in which the second bridge arm switch and the fourth bridge arm switch are both turned on, the second mode includes: a mode in which the first bridge arm switch and the fourth bridge arm switch are both turned on, and the third mode includes: a mode in which the second bridge arm switch and the third bridge arm switch are both turned on.

[0056] In this way, by controlling the conduction state of each bridge arm switch, the switching of the first bridge arm and the second bridge arm between different modes can be controlled, so that the positive half-cycle signal in the AC signal and the positive signal corresponding to the negative half-cycle signal are transmitted to the processing unit in sequence, so that the processing unit can process the received signals in sequence and charge the battery, thereby realizing the coordinated work of each bridge arm and the processing unit and improving the charging efficiency of the battery.

[0057] Optionally, charging the battery according to the positive half-cycle signal and the positive signal includes: the controller controls the processing unit to switch between the first state, the second state, and the third state in response to the positive half-cycle signal; controls the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; wherein the processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a first capacitor, a second capacitor, and a third capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is connected to the second end of the second switch and the first end of the first capacitor respectively, and the first switch The second end of the first switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the seventh switch and the first end of the third capacitor, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is respectively connected to the second end of the fifth switch, the battery, the first end of the seventh switch, and the second end of the eighth switch. The second end is also connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the second end of the second capacitor, and the second end of the fifth switch is also connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground terminal, and the second end of the sixth switch is also connected to the second end of the second capacitor; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is also connected to the battery, and the second end of the seventh switch is also connected to the first end of the third capacitor; the control end of the eighth switch is connected to the controller, the first end of the eighth switch is respectively connected to the second end of the third capacitor and the ninth switch. The second end of the eighth switch is connected to the battery; the control end of the ninth switch is connected to the controller, the first end of the ninth switch is connected to the ground end, and the second end of the ninth switch is also connected to the second end of the third capacitor; the first state includes: the second switch, the third switch, the fourth switch, the sixth switch, and the eighth switch are all turned on; the second state includes: the first switch, the fourth switch, the sixth switch, the seventh switch, and the ninth switch are all turned on; the third state includes: the first switch, the fifth switch, the seventh switch, and the ninth switch are all turned on; the first mode includes the first state, and the second mode and the third mode both include the first state, the second state, and the third state. In this way, by switching the processing unit between different states, the battery can be charged based on the positive half-cycle signal and the positive signal, respectively.

[0058] Optionally, charging the battery according to the positive half-cycle signal and the positive signal includes: the controller controls the processing unit to switch between the first state, the second state, and the third state in response to the positive half-cycle signal; controls the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; wherein the processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor, and a second capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground terminal, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the first end of the fourth switch, the second end of the fifth switch, and the first end of the sixth capacitor The control end of the fourth switch is connected to the controller, the first end of the fourth switch is also connected to the battery, and the second end of the fourth switch is also connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the second end of the second capacitor, and the second end of the fifth switch is also connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground terminal, and the second end of the sixth switch is also connected to the second end of the second capacitor; the first state includes: the state in which the second switch, the third switch, the fourth switch, and the sixth switch are all turned on; the second state includes: the state in which the first switch, the fourth switch, and the sixth switch are all turned on; the third state includes: the state in which the first switch and the fifth switch are all turned on; the first mode includes the first state, and the second mode and the third mode both include: the first state, the second state, and the third state. In this way, by switching the processing unit between different states, the battery can be charged based on the positive half-cycle signal and the positive signal, respectively.

[0059] Optionally, charging the battery according to the positive half-cycle signal and the positive signal includes: the controller controls the processing unit to switch between the first state, the second state, and the third state in response to the positive half-cycle signal; controls the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; wherein the processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor, and a second capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the first end of the fourth switch, the second end of the fifth switch, and the battery; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground terminal, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, and the first end of the third switch is respectively connected to the second end of the fourth switch and the second capacitor The first end of the third switch is connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm respectively; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is also connected to the battery, and the second end of the fourth switch is also connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the second end of the second capacitor, and the second end of the fifth switch is also connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground terminal, and the second end of the sixth switch is also connected to the second end of the second capacitor; the first state includes: the state in which the second switch, the fourth switch, and the sixth switch are all turned on; the second state includes: the state in which the second switch, the third switch, and the fifth switch are all turned on; the third state includes: the state in which the first switch, the fourth switch, and the sixth switch are all turned on; the first mode includes the first state, and the second mode and the third mode both include: the second state and the third state. In this way, by switching the processing unit between different states, the battery can be charged based on the positive half-cycle signal and the positive signal respectively.

[0060] It should be understood that since the principle of solving the problem by the charging method is similar to the principle of solving the problem by the aforementioned wireless power receiving circuit, the implementation and technical effects of the charging method can refer to the implementation and technical effects of the aforementioned wireless power receiving circuit, and the repeated parts will not be repeated. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] FIG1 is a schematic diagram of an application scenario of a wireless charging system provided in an embodiment of the present application;

[0062] FIG2 is a schematic structural diagram of a wireless charging system provided in an embodiment of the present application;

[0063] FIG3 is a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application;

[0064] FIG4 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0065] FIG5 is a schematic diagram showing the working principle of the structure shown in FIG4 ;

[0066] FIG6 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0067] FIG7 is a schematic diagram showing the working principle of the structure shown in FIG6 ;

[0068] FIG8 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0069] FIG9 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0070] FIG10 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0071] FIG11 is a schematic diagram showing the working principle of the structure shown in FIG10 ;

[0072] FIG12 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0073] FIG13 is a schematic diagram showing the working principle of the structure shown in FIG12 ;

[0074] FIG14 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0075] FIG15 is a schematic diagram showing the working principle of the structure shown in FIG14 ;

[0076] FIG16 is a schematic structural diagram of yet another wireless power receiving circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0078] It should be noted that the same reference numerals in the drawings of this application represent the same or similar structures, and thus their repeated description will be omitted. The words expressing positions and directions described in this application are all explained using the drawings as examples, but they can be modified as needed, and such modifications are included in the scope of protection of this application. The drawings of this application are only for illustrating relative positional relationships and do not represent true proportions.

[0079] In order to facilitate understanding of the technical solution provided by the embodiments of the present application, its application scenario is first explained below.

[0080] The technical solution provided in the embodiment of the present application can be applied to a wireless charging system. Compared with wired charging, wireless charging has the advantages of being easy to carry and simple to operate. Figure 1 exemplifies an application scenario of a wireless charging system. As shown in Figure 1, after the power receiving device is close to the charging device, the coil in the power receiving device and the coil of the charging device undergo electromagnetic induction, and energy (or electrical energy, or wireless charging signal) is transmitted from the charging device to the power receiving device. Among them, the electronic device may include a power receiving device, and the electronic device may be, but is not limited to, a mobile phone, a tablet, a smart wearable device, and the like. The charging device may be, but is not limited to, a wireless charger, a wireless power bank, and the like.

[0081] FIG2 exemplifies a specific structural diagram of a wireless charging system. As shown in FIG2 , the charging device may include an inverter and a transmitting coil, and the receiving device may include a receiving coil, a rectifier, a linear regulator, an overvoltage protector, a DC-DC converter, and a battery, arranged in cascade. The input of the inverter is connected to a DC power source, and is used to convert the DC power output by the DC power source into AC power, which is then transmitted to the receiving coil via the transmitting coil. The receiving coil receives the AC power transmitted by the transmitting coil, converts it into DC power via the rectifier, and then processes it sequentially through the linear regulator, overvoltage protector, and DC-DC converter before outputting it to the battery to charge the battery. It should be understood that the charging device in FIG2 is based on a wireless charger, so the charging device needs to be connected to a DC power source when charging the receiving device. If the wireless charging device is a wireless power bank, the charging device does not need to be connected to a DC power source when charging the receiving device. The transmitting coil and the receiving coil form an LC resonator. The transmitting coil can be considered the power transmitter in the LC resonator, and the receiving coil can be considered the power receiver in the LC resonator.

[0082] As the charging power of electronic products continues to increase, wired and wireless charging solutions are taking up increasingly larger board areas, resulting in limited board space and tight device layouts. In high-power wireless charging scenarios, due to the use of a multi-stage cascade circuit solution (as shown in Figure 2, which includes the receiving coil, rectifier, linear regulator, overvoltage protector, and DC-DC converter), each circuit stage operates completely independently. Therefore, high-voltage large capacitors must be added to the output of both the rectifier bridge and the linear regulator for filtering. This results in a bloated wireless charging solution, low wireless charging efficiency, and high losses, impacting fast charging speeds and user experience.

[0083] To address the aforementioned issues, an embodiment of the present application provides a wireless charging solution. By configuring two bridge arms, a first switch unit, a second switch unit, and a connection relationship with a DC-DC converter, the two bridge arms, the first switch unit, the second switch unit, and the DC-DC converter are not in a cascaded relationship. Instead, they work together to process AC signals. Furthermore, the three components are not independent of each other but rather interact with each other. Therefore, the wireless power receiving circuit, including the two bridge arms, the first switch unit, the second switch unit, and the DC-DC converter, is a single-stage circuit solution. The losses incurred when charging the battery are single-stage losses, which effectively reduces energy losses during charging and improves charging efficiency compared to the multi-stage losses in a multi-stage cascaded circuit solution. Furthermore, by configuring two bridge arms, the first switch unit, and the second switch unit, the number of connections between the multiple capacitors, the power receiver, and the battery in each processing unit can be increased when charging the battery, making the charging curve more similar to the curve corresponding to the AC signal, thereby further improving charging efficiency.

[0084] To make the objectives, technical solutions, and advantages of this application more clear, the following detailed description of the technical solutions of the embodiments of this application will be provided in conjunction with the accompanying drawings. It should be understood that the drawings herein are only intended to illustrate the relative positional relationships or connection relationships between the various components. Some components are exaggerated for ease of understanding, and the shapes and sizes of the components in the drawings do not reflect the actual proportional relationships.

[0085] FIG3 exemplarily illustrates a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. As shown in FIG3 , the wireless power receiving circuit may include: a power receiver, a first bridge arm, a second bridge arm, a first switch unit, a second switch unit, a DC-DC converter, and a controller (not shown in FIG3 ). The DC-DC converter includes a first processing unit and a second processing unit. The power receiver is respectively connected to the midpoint of the first bridge arm (i.e., node P1) and the first switch unit, and is further respectively connected to the midpoint of the second bridge arm (i.e., node P2) and the second switch unit. The power receiver is configured to output an AC signal to the midpoint of the first bridge arm, the midpoint of the second bridge arm, the first switch unit, and the second switch unit in response to wireless power transmission (i.e., power wirelessly transmitted via an LC resonator).

[0086] The first bridge arm is further connected to the first input terminal P11 of the first processing unit, the ground terminal GND, and the controller respectively, and the second bridge arm is further connected to the first input terminal P21 of the second processing unit, the ground terminal GND, and the controller respectively; the first switch unit is further connected to the second input terminal P12 of the first processing unit, and the first input terminal P11 of the first processing unit is different from the second input terminal P12 of the first processing unit; the second switch unit is further connected to the second input terminal P22 of the second processing unit, and the first input terminal P21 of the second processing unit is different from the second input terminal P22 of the second processing unit;

[0087] The positive half-cycle signal of the AC signal includes a first partial signal and a second partial signal, and the negative half-cycle signal of the AC signal includes a third partial signal and a fourth partial signal. The controller is used to: in response to the first partial signal in the positive half-cycle signal, control the first bridge arm and the second bridge arm to output the first partial signal to the first processing unit; in response to the second partial signal in the positive half-cycle signal, control the second bridge arm and the first switch unit to output the second partial signal to the first processing unit; in response to the third partial signal in the negative half-cycle signal, control the first bridge arm and the second bridge arm to output a first positive signal corresponding to the third partial signal to the second processing unit; in response to the fourth partial signal in the negative half-cycle signal, control the first bridge arm and the second switch unit to output a second positive signal corresponding to the fourth partial signal to the second processing unit;

[0088] The output end of the first processing unit is used to connect to the battery. Under the action of the first part of the signal, a first connection relationship is presented between the multiple capacitors, the power receiver and the battery in the first processing unit. Under the action of the second part of the signal, the multiple capacitors, the power receiver and the battery in the first processing unit are presented with a second connection relationship, and the first connection relationship and the second connection relationship are different; the output end of the second processing unit is used to connect to the battery. Under the action of the first positive signal, a third connection relationship is presented between the multiple capacitors, the power receiver and the battery in the second processing unit. Under the action of the second positive signal, a fourth connection relationship is presented between the multiple capacitors, the power receiver and the battery in the second processing unit. The third connection relationship and the fourth connection relationship are different.

[0089] That is to say, the AC signal includes a positive half-cycle signal and a negative half-cycle signal, and the positive half-cycle signal includes a first part signal and a second part signal, and the negative half-cycle signal includes a third part signal and a fourth part signal. At this time, the two bridge arms and the first switching unit are used in conjunction with each other to transmit the two parts of the positive half-cycle signal to the first processing unit respectively, so that the first processing unit charges the battery; and the two bridge arms and the second switching unit are used in conjunction with each other to process the two parts of the negative half-cycle signal respectively to obtain corresponding positive signals, and transmit these positive signals to the second processing unit respectively, so that the second processing unit charges the battery. In other words, the first processing unit can charge the battery based on the positive half-cycle signal under the action of the two bridge arms and the first switch unit, and the second processing unit can also charge the battery based on the positive signal corresponding to the negative half-cycle signal under the action of the two bridge arms and the second switch unit. Therefore, through the coordinated operation of the first processing unit, the second processing unit, the two bridge arms, the first switch unit, and the second switch unit, the battery can be charged based on the AC signal, so that the whole composed of the DCDC converter, the two bridge arms, the first switch unit, and the second switch unit can play the role of AC-DC conversion, and the DCDC converter, the two bridge arms, the first switch unit, and the second switch unit cooperate with each other during operation, and are not independent of each other. Therefore, the wireless power receiving circuit provided in the embodiment of the present application belongs to a single-stage circuit scheme, and the loss existing when charging the battery belongs to a single-stage loss. Compared with the multi-stage loss in the multi-stage circuit cascade scheme, it can effectively reduce the energy loss during charging and improve the charging efficiency of the battery.

[0090] In addition, the first switch unit and the first bridge arm are respectively connected to different input ends of the first processing unit, and the second switch unit and the second bridge arm are respectively connected to different input ends of the second processing unit, so that the first connection relationship and the second connection relationship are different, and the third connection relationship and the fourth connection relationship are different. When charging the battery, the types of connection relationships among multiple capacitors, power receivers and batteries in each processing unit can be increased, so that the charging curve is closer to the curve corresponding to the AC signal, thereby further improving the charging efficiency.

[0091] It should be understood that the positive pole of the power receiver (i.e., the end indicated by + in FIG3 ) is connected to the midpoint of the first bridge arm (i.e., node P1), and the negative pole of the power receiver (i.e., the end indicated by - in FIG3 ) is connected to the midpoint of the second bridge arm (i.e., node P2), as shown in FIG3 ; alternatively, the positive pole of the power receiver is connected to the midpoint of the second bridge arm (i.e., node P2), and the negative pole of the power receiver is connected to the midpoint of the first bridge arm (i.e., node P1), which is not shown in the figure. This article uses the example of the positive pole of the power receiver being connected to the midpoint of the first bridge arm (i.e., node P1) and the negative pole of the power receiver being connected to the midpoint of the second bridge arm (i.e., node P2) for explanation.

[0092] As shown in Figure 3, the first bridge arm may include: a first bridge arm switch Q1 and a second bridge arm switch Q2, the control electrode of the first bridge arm switch Q1 is connected to the controller, the first electrode of the first bridge arm switch Q1 is respectively connected to the positive electrode of the power receiver (i.e., node P1) and the second electrode of the second bridge arm switch Q2, and the second electrode of the first bridge arm switch Q1 is connected to the first input terminal P11 of the first processing unit; the control electrode of the second bridge arm switch Q2 is connected to the controller, the first electrode of the second bridge arm switch Q2 is connected to the ground terminal GND, and the second electrode of the second bridge arm switch Q2 is also connected to the positive electrode of the power receiver. The second bridge arm may include: a third bridge arm switch Q3 and a fourth bridge arm switch Q4, wherein the control electrode of the third bridge arm switch Q3 is connected to the controller, the first electrode of the third bridge arm switch Q3 is respectively connected to the negative electrode of the power receiver (i.e., node P2) and the second electrode of the fourth bridge arm switch Q4, and the second electrode of the third bridge arm switch Q3 is connected to the first input terminal P21 of the second processing unit; the control electrode of the fourth bridge arm switch Q4 is connected to the controller, the first electrode of the fourth bridge arm switch Q4 is connected to the ground terminal GND, and the second electrode of the fourth bridge arm switch Q4 is also connected to the negative electrode of the power receiver.

[0093] As shown in FIG3 , the first switch unit includes a first switch M1, a control electrode of the first switch M1 being connected to the controller, a first electrode of the first switch M1 being connected to the second input terminal P12 of the first processing unit, and a second electrode of the first switch M1 being connected to the positive electrode of the power receiver; the second switch unit includes a second switch M2, a control electrode of the second switch M2 being connected to the controller, a first electrode of the second switch M2 being connected to the second input terminal P22 of the second processing unit, and a second electrode of the second switch M2 being connected to the negative electrode of the power receiver;

[0094] As shown in FIG4 , the first processing unit includes: a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a seventh switch M7, an eighth switch M8, a ninth switch M9, a tenth switch M10, an eleventh switch M11, a first capacitor C1, a second capacitor C2, and a third capacitor C3; a control end of the third switch M3 is connected to the controller, a first end of the third switch M3 is respectively connected to the second end of the fourth switch M4, the first end of the first capacitor C1, and the first switch unit, and a second end of the third switch M3 is respectively connected to the second end of the sixth switch M6, the first end of the second capacitor C2, and the second end of the third switch M3. The first end of the fourth switch M4 is connected to the first end of the first capacitor C1 and the first switch unit; the control end of the fifth switch M5 is connected to the controller, the first end of the fifth switch M5 is connected to the second end of the ninth switch M9 and the first end of the third capacitor C3, and the second end of the fifth switch M5 is connected to the second end of the first capacitor C1 and the first bridge arm; the control end of the sixth switch M6 is connected to the controller, the first end of the sixth switch M6 is connected to the seventh switch M7 and the seventh switch M8. The second end of the ninth switch M8 is connected to the battery, the first end of the ninth switch M9 is connected to the second end of the tenth switch M10, and the second end of the sixth switch M6 is also connected to the first end of the second capacitor C2; the control end of the seventh switch M7 is connected to the controller, the first end of the seventh switch M7 is respectively connected to the second end of the eighth switch M8 and the second end of the second capacitor C2, and the second end of the seventh switch M7 is also connected to the battery; the control end of the eighth switch M8 is connected to the controller, the first end of the eighth switch M8 is connected to the ground terminal GND, and the second end of the eighth switch M8 is also connected to the second end of the second capacitor C2; the ninth switch M9 is connected to the controller, the first end of the eighth switch M8 is connected to the ground terminal GND, and the second end of the eighth switch M8 is also connected to the second end of the second capacitor C2; The control end of the ninth switch M9 is connected to the controller, the first end of the ninth switch M9 is also connected to the battery, and the second end of the ninth switch M9 is also connected to the first end of the third capacitor C3; the control end of the tenth switch M10 is connected to the controller, the first end of the tenth switch M10 is respectively connected to the second end of the third capacitor C3 and the second end of the eleventh switch M11, and the second end of the tenth switch M10 is also connected to the battery; the control end of the eleventh switch M11 is connected to the controller, the first end of the eleventh switch M11 is connected to the ground end GND, and the second end of the eleventh switch M11 is also connected to the second end of the third capacitor C3.

[0095] 4 , the second processing unit includes: a twelfth switch M12, a thirteenth switch M13, a fourteenth switch M14, a fifteenth switch M15, a sixteenth switch M16, a seventeenth switch M17, an eighteenth switch M18, a nineteenth switch M19, a twentieth switch M20, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; a control end of the twelfth switch M12 is connected to the controller, a first end of the twelfth switch M12 is respectively connected to the second end of the thirteenth switch M13, the first end of the fourth capacitor C4, and the second switch unit, and a second end of the twelfth switch M12 is respectively connected to the second end of the fifteenth switch M15, the first end of the fourth capacitor C4, and the second switch unit. The first end of the fifth capacitor C5 is connected; the control end of the thirteenth switch M13 is connected to the controller, the first end of the thirteenth switch M13 is connected to the ground terminal GND, and the second end of the thirteenth switch M13 is also connected to the first end of the fourth capacitor C4 and the second switch unit respectively; the control end of the fourteenth switch M14 is connected to the controller, the first end of the fourteenth switch M14 is respectively connected to the second end of the eighteenth switch M18 and the first end of the sixth capacitor C6, and the second end of the fourteenth switch M14 is respectively connected to the second end of the fourth capacitor C4 and the second bridge arm; the control end of the fifteenth switch M15 is connected to the controller, the first end of the fifteenth switch M15 is respectively connected to the second end of the fourth capacitor C4 and the second bridge arm. The first terminal of the first switch M17 is connected to the second terminal of the first switch M17, the second terminal of the fifth capacitor C5, and the second terminal of the fifth switch M17. The first terminal of the first switch M17 is connected to the second terminal of the first switch M17, the second terminal of the fifth capacitor C5, and the second terminal of the fifth switch M17 is connected to the battery. The first terminal of the first switch M17 is connected to the ground terminal GND, and the second terminal of the first switch M17 is connected to the second terminal of the fifth capacitor C5. a control end of an eighteenth switch M18 is connected to the controller, a first end of the eighteenth switch M18 is also connected to the battery, and a second end of the eighteenth switch M18 is also connected to the first end of the sixth capacitor C6; a control end of a nineteenth switch M19 is connected to the controller, a first end of the nineteenth switch M19 is respectively connected to the second end of the sixth capacitor C6 and the second end of the twentieth switch M20, and the second end of the nineteenth switch M19 is also connected to the battery; a control end of a twentieth switch M20 is connected to the controller, a first end of the twentieth switch M20 is connected to the ground terminal GND, and a second end of the twentieth switch M20 is also connected to the second end of the sixth capacitor C6.

[0096] It should be understood that, as used herein, each switch and each arm switch may be, but is not limited to, a switching device having a control terminal, such as a field-effect transistor or a triode. The specific design can be based on actual needs and is not specifically limited here. For example, in the case where the switch and arm switch are field-effect transistors, the control terminal serves as the gate, the first terminal serves as the source, and the second terminal serves as the drain.

[0097] Based on the structure shown in FIG4 , the specific operation process of the wireless power receiving circuit may include:

[0098] For the positive half-cycle signal of the AC signal: the controller controls each switch so that the first processing unit operates in the first state, the second state, the first state, the second state, the third state, the second state, the first state, the second state, and the first state in sequence, thereby enabling the first processing unit to switch between the first state, the second state, and the third state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms operate in the first mode, the second mode, and the first mode in sequence, thereby enabling each bridge arm to switch between the first mode and the second mode. Furthermore, the controller controls the second bridge arm and the first switch unit so that the second bridge arm and the first switch unit operate in a fourth mode, and the fourth mode exists between the first mode and the second mode. That is, under the control of the controller, the two bridge arms and the first switch unit operate in the first mode, the fourth mode, the second mode, the fourth mode, and the first mode in sequence. The first mode includes the first state, the fourth mode includes the second state, and the second mode includes the first state, the second state, and the third state.

[0099] In the first state of the first mode (i.e., Mode 1), the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both on, the first bridge arm switch Q1 and the third bridge arm switch Q3 are both off; the first switch is off; the fourth switch M4, the fifth switch M5, the sixth switch M6, the eighth switch M8, and the tenth switch M10 are all on, and all other switches in the first processing unit are off. At this point, in conjunction with Mode 1 shown in FIG5 , resistor R0 represents a battery, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the resistor R0 representing the battery are all disconnected from the power receiver represented by AC. The first capacitor C1 discharges into resistor R0, and the second capacitor C2 is connected in parallel with resistor R0, so Vb = Vc2. It is worth noting that when Mode 1 first appears in the first processing unit, Vb is approximately 0V because the first capacitor C1 has no stored energy. However, as the modes cycle, when Mode 1 appears later, energy is already stored in the first capacitor C1, so the first capacitor C1 can charge the resistor R0, and Vb = Vc2.

[0100] In the second state of the fourth mode (i.e., mode 2), the fourth bridge arm switch Q4 is turned on, the first bridge arm switch Q1, the second bridge arm switch Q2, and the third bridge arm switch Q3 are all turned off; the first switch is turned on; the third switch M3, the sixth switch M6, the eighth switch M8, the ninth switch M9, and the eleventh switch M11 are all turned on, and the other switches in the first processing unit are all turned off. At this time, combined with mode 2 shown in Figure 5, the second capacitor C2, the third capacitor C3, the resistor R0, and the power receiver represented by AC are connected in parallel, one end of the second capacitor C2 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is left floating, so it can be obtained that V AC =Vb, Vc2=Vc3=Vb (i.e., Relationship 1).

[0101] In the first state of the second mode (i.e., mode 3), the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch is off; the fourth switch M4, the fifth switch M5, the sixth switch M6, the eighth switch M8, and the tenth switch M10 are all on, and the other switches in the first processing unit are all off. At this time, combined with mode 3 shown in Figure 5, the second capacitor C2 and the third capacitor C3 are connected in series and then in parallel with the first capacitor C1, and the first capacitor C1 is connected in parallel with the power receiver represented by AC, and the second capacitor C2 is connected in parallel with the resistor R0 used to represent the battery, so it can be obtained that V AC =Vc1, Vc1=Vc2+Vc3 (i.e., Relationship 2).

[0102] In the second state of the second mode (i.e., mode 4), the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch is off; the third switch M3, the sixth switch M6, the eighth switch M8, the ninth switch M9, and the eleventh switch M11 are all on, and the other switches in the first processing unit are all off. At this time, combined with mode 4 shown in Figure 5, the second capacitor C2, the third capacitor C3, and the resistor R0 are connected in parallel and then in series with the first capacitor C1 to form a whole. This whole is then connected in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2, Vc2=Vc3=Vb, combining equation 1 and equation 2, we can get V AC =3Vb.

[0103] In the third state (i.e., mode 5) of the second mode, the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch is off; the third switch M3, the seventh switch M7, the ninth switch M9, and the eleventh switch M11 are all on, and the other switches in the first processing unit are all off. At this time, combined with mode 5 shown in Figure 5, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in series and then in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2+Vc3 (i.e., relation 3). Combining relation 1, relation 2, and relation 3, we can get V AC =4Vb.

[0104] Therefore, in mode 1, the charging voltage Vb provided to the battery is approximately the voltage of the second capacitor C2; in mode 2, the charging voltage Vb provided to the battery is approximately the second part of the signal in the positive half-cycle signal; in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 2 of the first part of the signal in the positive half-cycle signal; in mode 4, the charging voltage Vb provided to the battery is approximately 1 / 3 of the first part of the signal in the positive half-cycle signal; in mode 5, the charging voltage Vb provided to the battery is approximately 1 / 4 of the first part of the signal in the positive half-cycle signal.

[0105] As shown in Figure 5 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms, the first switch unit, and the first processing unit sequentially operates in Mode 1, Mode 2, Mode 3, Mode 4, Mode 5, Mode 4, Mode 3, Mode 2, and Mode 1. Specifically, during the process of increasing the signal from 0 in the positive half-cycle signal to its maximum value, the entire system consisting of the two bridge arms, the first switch unit, and the first processing unit sequentially operates in Mode 1, Mode 2, Mode 3, Mode 4, and Mode 5. During the process of decreasing the signal from its maximum value to 0 in the positive half-cycle signal, the entire system consisting of the two bridge arms, the first switch unit, and the first processing unit sequentially operates in Mode 5, Mode 4, Mode 3, Mode 2, and Mode 1. Furthermore, Modes 1, 3, 4, and 5 are used to process the first portion of the positive half-cycle signal, while Mode 2 is used to process the second portion of the positive half-cycle signal. It should be understood that the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0106] For the negative half-cycle signal of the AC signal: the controller controls each switch so that the second processing unit operates in the fourth state, the fifth state, the fourth state, the fifth state, the sixth state, the fifth state, the fourth state, the fifth state, and the fourth state in sequence, thereby enabling the second processing unit to switch between the fourth state, the fifth state, and the sixth state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms operate in the first mode, the third mode, and the first mode in sequence, thereby enabling each bridge arm to switch between the first mode and the third mode. Furthermore, the controller controls the first bridge arm and the second switch unit so that the first bridge arm and the second switch unit operate in the fifth mode, and the fifth mode exists between the first mode and the third mode. That is, under the control of the controller, the two bridge arms and the second switch unit operate in the first mode, the fifth mode, the third mode, the fifth mode, and the first mode in sequence. The first mode includes the fourth state, the fifth mode includes the fifth state, and the third mode includes the fourth state, the fifth state, and the sixth state.

[0107] In the fourth state (i.e., mode 6) of the first mode, the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both turned on, and the first bridge arm switch Q1 and the third bridge arm switch Q3 are both turned off; the second switch is turned off; the thirteenth switch M13, the fourteenth switch M14, the fifteenth switch M15, the seventeenth switch M17, and the nineteenth switch M19 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 used to represent the battery have the connection relationship shown in mode 6 in Figure 5.

[0108] In the fifth state (i.e., mode 7) of the fifth mode, the second bridge arm switch Q2 is turned on, and the first bridge arm switch Q1, the third bridge arm switch Q3, and the fourth bridge arm switch Q4 are all turned off; the second switch is turned on; the twelfth switch M12, the fifteenth switch M15, the seventeenth switch M17, the eighteenth switch M18, and the twentieth switch M20 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 used to represent the battery have the connection relationship shown in mode 7 in Figure 5.

[0109] In the fourth state (i.e., mode 8) of the third mode, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the second switch is turned off; the thirteenth switch M13, the fourteenth switch M14, the fifteenth switch M15, the seventeenth switch M17, and the nineteenth switch M19 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 used to represent the battery have the connection relationship shown in mode 8 in Figure 5.

[0110] In the fifth state (i.e., mode 9) of the third mode, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the second switch is turned off; the twelfth switch M12, the fifteenth switch M15, the seventeenth switch M17, the eighteenth switch M18, and the twentieth switch M20 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 used to represent the battery have the connection relationship shown in mode 9 in Figure 5.

[0111] In the sixth state (i.e., mode 10) of the third mode, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the second switch is turned off; the twelfth switch M12, the sixteenth switch M16, the eighteenth switch M18, and the twentieth switch M20 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 used to represent the battery have the connection relationship shown in mode 10 in Figure 5.

[0112] Similarly, for the second processing unit, based on the working process being similar to that of the first processing unit, in mode 6, the charging voltage Vb provided to the battery is approximately the voltage of the fifth capacitor C5; in mode 7, the charging voltage Vb provided to the battery is approximately the second positive signal corresponding to the fourth portion of the signal in the negative half-cycle signal; in mode 8, the charging voltage Vb provided to the battery is approximately 1 / 2 of the first positive signal corresponding to the third portion of the signal in the negative half-cycle signal; in mode 9, the charging voltage Vb provided to the battery is approximately 1 / 3 of the first positive signal corresponding to the third portion of the signal in the negative half-cycle signal; and in mode 10, the charging voltage Vb provided to the battery is approximately 1 / 4 of the first positive signal corresponding to the third portion of the signal in the negative half-cycle signal.

[0113] Based on this, and in conjunction with Figure 5 , in response to a positive signal corresponding to a negative half-cycle signal, the entire system consisting of the two bridge arms and the second processing unit sequentially operates in Mode 6, Mode 7, Mode 8, Mode 9, Mode 10, Mode 9, Mode 8, Mode 7, and Mode 6. Specifically, during the process of increasing the positive signal from 0 to its maximum value, the entire system consisting of the two bridge arms, the second switch unit, and the second processing unit sequentially operates in Mode 6, Mode 7, Mode 8, Mode 9, and Mode 10. During the process of decreasing the positive signal from its maximum value to 0, the entire system consisting of the two bridge arms, the second switch unit, and the second processing unit sequentially operates in Mode 10, Mode 9, Mode 8, Mode 7, and Mode 6. Furthermore, Modes 6, 8, 9, and 10 are used to process the first positive signal corresponding to the third portion of the negative half-cycle signal, and Mode 7 is used to process the second positive signal corresponding to the fourth portion of the negative half-cycle signal. It should be understood that the switching timing between the modes can be designed according to actual needs and is not specifically limited here.

[0114] In summary, based on the above working process, the first processing unit charges the battery based on the positive half-cycle signal, and the second processing unit charges the battery based on the positive signal corresponding to the negative half-cycle signal, and the battery is charged based on the AC signal in a cycle. In addition, the charging voltage provided to the battery in different modes may be different, but the difference is not significant, so that the battery can be charged at a relatively stable charging voltage. It should be understood that when charging the battery, the specific charging strategy can be designed according to the actual situation. The embodiments of the present application do not focus on the specific charging strategy, as long as it can achieve battery charging.

[0115] As shown in Figure 3, since node P1 is connected to the positive pole of the power receiver and node P2 is connected to the negative pole of the power receiver, for the positive half-cycle signal, the potential of node P1 is higher than the potential of node P2. Therefore, when the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned on, or when the first switch and the fourth bridge arm switch Q4 are both turned on, the node P2 with lower potential is connected to the ground terminal GND, and the node P1 with higher potential is connected to the first processing unit. At this time, the signal transmitted to the first processing unit is a non-negative signal, so the positive half-cycle signal can be transmitted to the first processing unit, so that the first processing unit charges the battery based on the positive half-cycle signal. For the negative half-cycle signal, the potential of node P1 is lower than the potential of node P2. Therefore, when the third bridge arm switch Q3 and the second bridge arm switch Q2 are both turned on, or when the second switch and the second bridge arm switch Q2 are both turned on, the node P1 with lower potential is connected to the ground terminal GND, and the node P2 with higher potential is connected to the second processing unit. At this time, the signal transmitted to the second processing unit is also a non-negative signal, that is, the signal transmitted to the second processing unit is a positive signal corresponding to the negative half-cycle signal, so that the second processing unit charges the battery based on the positive signal.

[0116] It should be understood that in the structure described above, the controller involved can be the same controller, that is, one controller controls the two bridge arms, two switch units, and the DCDC converter; or, in the structure described above, the controllers involved can be different controllers, that is, multiple controllers control the two bridge arms, two switch units, and the DCDC converter. The specific design can be based on actual needs and is not specifically limited here. The specific structure of the controller can be any device that can implement the control function known to those skilled in the art, such as but not limited to a single-chip microcomputer, an FPGA (Field Programmable Gate Array), a central processing unit, etc., and is not limited here.

[0117] FIG6 exemplarily shows a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. As shown in FIG6 , the structure of the wireless power receiving circuit in this embodiment is basically similar to that of the wireless power receiving circuit shown in FIG3 and FIG4 in the aforementioned embodiments, except that the structures of the first processing unit and the second processing unit are different. For example, as shown in FIG6 , the first processing unit includes: a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a seventh switch M7, an eighth switch M8, a first capacitor C1, and a second capacitor C2; the control end of the third switch M3 is connected to the controller, the first end of the third switch M3 is respectively connected to the second end of the fourth switch M4, the first end of the first capacitor C1, and the first switch unit, and the second end of the third switch M3 is respectively connected to the first end of the sixth switch M6, the second end of the seventh switch M7, and the battery; the control end of the fourth switch M4 is connected to the controller, the first end of the fourth switch M4 is connected to the ground terminal GND, and the second end of the fourth switch M4 is also respectively connected to the first end of the first capacitor C1 and the first switch unit; the control end of the fifth switch M5 is connected to the controller The first end of the fifth switch M5 is connected to the second end of the sixth switch M6 and the first end of the second capacitor C2, respectively, and the second end of the fifth switch M5 is connected to the second end of the first capacitor C1 and the first bridge arm, respectively; the control end of the sixth switch M6 is connected to the controller, the first end of the sixth switch M6 is also connected to the battery, and the second end of the sixth switch M6 is also connected to the first end of the second capacitor C2; the control end of the seventh switch M7 is connected to the controller, the first end of the seventh switch M7 is respectively connected to the second end of the eighth switch M8 and the second end of the second capacitor C2, and the second end of the seventh switch M7 is also connected to the battery; the control end of the eighth switch M8 is connected to the controller, the first end of the eighth switch M8 is connected to the ground terminal GND, and the second end of the eighth switch M8 is also connected to the second end of the second capacitor C2.

[0118] The second processing unit includes: a ninth switch M9, a tenth switch M10, an eleventh switch M11, a twelfth switch M12, a thirteenth switch M13, a fourteenth switch M14, a third capacitor C3, and a fourth capacitor C4; a control end of the ninth switch M9 is connected to the controller, a first end of the ninth switch M9 is respectively connected to the second end of the tenth switch M10, the first end of the third capacitor C3, and the second switch unit, a second end of the ninth switch M9 is respectively connected to the first end of the twelfth switch M12, the second end of the thirteenth switch M13, and the battery; a control end of the tenth switch M10 is connected to the controller, a first end of the tenth switch M10 is connected to the ground end GND, and a second end of the tenth switch M10 is also respectively connected to the first end of the third capacitor C3 and the second switch unit; a control end of the eleventh switch M11 is connected to the controller, and the eleventh switch M11 is connected to the controller. The first end of the 12th switch M11 is respectively connected to the second end of the 12th switch M12 and the first end of the fourth capacitor C4, and the second end of the 11th switch M11 is respectively connected to the second end of the 12th switch M12 and the first end of the fourth capacitor C4, and the second end of the 11th switch M11 is respectively connected to the second end of the third capacitor C3 and the second bridge arm; the control end of the 12th switch M12 is connected to the controller, the first end of the 12th switch M12 is also connected to the battery, and the second end of the 12th switch M12 is also connected to the first end of the fourth capacitor C4; the control end of the 13th switch M13 is connected to the controller, the first end of the 13th switch M13 is respectively connected to the second end of the 14th switch M14 and the second end of the fourth capacitor C4, and the second end of the 13th switch M13 is also connected to the battery; the control end of the 14th switch M14 is connected to the controller, the first end of the 14th switch M14 is connected to the ground terminal GND, and the second end of the 14th switch M14 is also connected to the second end of the fourth capacitor C4.

[0119] Based on the structure shown in FIG6 , the specific operation process of the wireless power receiving circuit may include:

[0120] For the positive half-cycle signal of the AC signal: the controller controls each switch so that the first processing unit operates in the first state, the second state, the third state, the second state, and the first state in sequence, thereby enabling the first processing unit to switch between the first state, the second state, and the third state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms operate in the first mode, the second mode, and the first mode in sequence, thereby enabling each bridge arm to switch between the first mode and the second mode. Furthermore, the controller controls the second bridge arm and the first switch unit so that the second bridge arm and the first switch unit operate in a fourth mode, and the fourth mode exists between the first mode and the second mode. That is, under the control of the controller, the two bridge arms and the first switch unit operate in the first mode, the fourth mode, the second mode, the fourth mode, and the first mode in sequence. The first mode includes the first state, the fourth mode includes the second state, and the second mode includes the second state and the third state.

[0121] In the first state of the first mode (i.e., Mode 1), the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both on, the first bridge arm switch Q1 and the third bridge arm switch Q3 are both off; the first switch is off; the fourth switch M4, the sixth switch M6, and the eighth switch M8 are all on, and all other switches in the first processing unit are off. At this time, in conjunction with Mode 1 shown in FIG7 , resistor R0 represents a battery, the first capacitor C1, the second capacitor C2, and the resistor R0 representing the battery are all disconnected from the power receiver represented by AC. The second capacitor C2 is connected in parallel with the resistor R0, one end of the second capacitor C2 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is left floating, so Vb = Vc2.

[0122] In the first state of the fourth mode (i.e., mode 2), the fourth bridge arm switch Q4 is turned on, the first bridge arm switch Q1, the second bridge arm switch Q2, and the third bridge arm switch Q3 are all turned off; the first switch is turned on; the fourth switch M4, the sixth switch M6, and the eighth switch M8 are all turned on, and the other switches in the first processing unit are all turned off. At this time, combined with mode 2 shown in Figure 7, the second capacitor C2, the resistor R0, and the power receiver represented by AC are connected in parallel, one end of the second capacitor C2 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is left floating, so it can be obtained that V AC =Vb, Vc2=Vb.

[0123] In the second state of the second mode (i.e., mode 3), the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch is off; the fourth switch M4, the fifth switch M5, and the seventh switch M7 are all on, and the other switches in the first processing unit are all off. At this time, combined with mode 3 shown in Figure 7, the second capacitor C2 is connected in series with the resistor R0 used to represent the battery and then in parallel with the power receiver represented by AC, and the first capacitor C1 is connected in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1, Vc1=Vc2+Vb (i.e., relation 2), so V AC =2Vb.

[0124] In the third state (i.e., mode 4) of the second mode, the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch is off; the third switch M3, the sixth switch M6, and the eighth switch M8 are all on, and the other switches in the first processing unit are all off. At this time, combined with mode 4 shown in Figure 7, the second capacitor C2 and the resistor R0 are connected in parallel and then in series with the first capacitor C1 to form a whole. This whole is then connected in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2, combining equation 1 and equation 2, we can get VAC =3Vb.

[0125] Therefore, in mode 1, the charging voltage Vb provided to the battery is approximately the voltage of the second capacitor C2; in mode 2, the charging voltage Vb provided to the battery is approximately the second part of the signal in the positive half-cycle signal; in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 2 of the first part of the signal in the positive half-cycle signal; in mode 4, the charging voltage Vb provided to the battery is approximately 1 / 3 of the first part of the signal in the positive half-cycle signal.

[0126] As shown in FIG7 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms, the first switch unit, and the first processing unit sequentially operates in mode 1, mode 2, mode 3, mode 4, mode 3, mode 2, and mode 1. Specifically, during the process of increasing the signal from 0 in the positive half-cycle signal to the maximum value of the signal, the entire system consisting of the two bridge arms, the first switch unit, and the first processing unit sequentially operates in mode 1, mode 2, mode 3, and mode 4; during the process of decreasing the signal from the maximum value of the positive half-cycle signal to 0, the entire system consisting of the two bridge arms, the first switch unit, and the first processing unit sequentially operates in mode 4, mode 3, mode 2, and mode 1. Furthermore, mode 1, mode 3, and mode 4 are used to process the first portion of the signal in the positive half-cycle signal, and mode 2 is used to process the second portion of the signal in the positive half-cycle signal. It should be understood that the timing of switching between modes can be designed according to actual needs and is not specifically limited here.

[0127] For the negative half-cycle signal of the AC signal: the controller controls each switch so that the second processing unit operates in the fourth state, the fifth state, the sixth state, the fifth state, and the fourth state in sequence, thereby enabling the second processing unit to switch between the fourth state, the fifth state, and the sixth state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms operate in the first mode, the third mode, and the first mode in sequence, thereby enabling each bridge arm to switch between the first mode and the third mode. Furthermore, the controller controls the first bridge arm and the second switch unit so that the first bridge arm and the second switch unit operate in the fifth mode, and the fifth mode exists between the first mode and the third mode. That is, under the control of the controller, the two bridge arms and the second switch unit operate in the first mode, the fifth mode, the third mode, the fifth mode, and the first mode in sequence. The first mode includes the fourth state, the fifth mode includes the fourth state, and the third mode includes the fifth state and the sixth state.

[0128] In the fourth state (i.e., mode 5) of the first mode, the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both turned on, and the first bridge arm switch Q1 and the third bridge arm switch Q3 are both turned off; the second switch is turned off; the tenth switch M10, the twelfth switch M12, and the fourteenth switch M14 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the third capacitor C3, the fourth capacitor C4, and the resistor R0 used to represent the battery have the connection relationship shown in mode 5 in Figure 7.

[0129] In the fourth state (i.e., mode 6) of the fifth mode, the second bridge arm switch Q2 is turned on, and the first bridge arm switch Q1, the third bridge arm switch Q3, and the fourth bridge arm switch Q4 are all turned off; the second switch is turned on; the tenth switch M10, the twelfth switch M12, and the fourteenth switch M14 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the third capacitor C3, the fourth capacitor C4, and the resistor R0 used to represent the battery have the connection relationship shown in mode 6 in Figure 7.

[0130] In the fifth state (i.e., mode 7) of the third mode, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the second switch is turned off; the tenth switch M10, the eleventh switch M11, and the thirteenth switch M13 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the third capacitor C3, the fourth capacitor C4, and the resistor R0 used to represent the battery have the connection relationship shown in mode 7 in Figure 7.

[0131] In the sixth state (i.e., mode 8) of the third mode, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the second switch is turned off; the ninth switch M9, the twelfth switch M12, and the fourteenth switch M14 are all turned on, and the other switches in the second processing unit are all turned off; at this time, the third capacitor C3, the fourth capacitor C4, and the resistor R0 used to represent the battery have the connection relationship shown in mode 8 in Figure 7.

[0132] Similarly, for the second processing unit, based on the working process being similar to that of the first processing unit, in mode 5, the charging voltage Vb provided to the battery is approximately the voltage of the fourth capacitor C4; in mode 6, the charging voltage Vb provided to the battery is approximately the second positive signal corresponding to the fourth part of the signal in the negative half-cycle signal; in mode 7, the charging voltage Vb provided to the battery is approximately 1 / 2 of the first positive signal corresponding to the third part of the signal in the negative half-cycle signal; and in mode 8, the charging voltage Vb provided to the battery is approximately 1 / 3 of the first positive signal corresponding to the third part of the signal in the negative half-cycle signal.

[0133] Based on this, and in conjunction with Figure 7, in response to a positive signal corresponding to a negative half-cycle signal, the entire system consisting of the two bridge arms and the second processing unit sequentially operates in Mode 5, Mode 6, Mode 7, Mode 8, Mode 7, Mode 6, and Mode 5. Specifically, during the process of increasing the positive signal from 0 to its maximum value, the entire system consisting of the two bridge arms, the second switch unit, and the second processing unit sequentially operates in Mode 5, Mode 6, Mode 7, and Mode 8. During the process of decreasing the positive signal from its maximum value to 0, the entire system consisting of the two bridge arms, the second switch unit, and the second processing unit sequentially operates in Mode 8, Mode 7, Mode 6, and Mode 5. Furthermore, Modes 5, 7, and 8 are used to process the first positive signal corresponding to the third portion of the negative half-cycle signal, while Mode 6 is used to process the second positive signal corresponding to the fourth portion of the negative half-cycle signal. It should be understood that the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0134] In summary, based on the above working process, the first processing unit charges the battery based on the positive half-cycle signal, and the second processing unit charges the battery based on the positive signal corresponding to the negative half-cycle signal, and the battery is charged based on the AC signal in a cycle. In addition, the charging voltage provided to the battery in different modes may be different, but the difference is not significant, so that the battery can be charged at a relatively stable charging voltage. It should be understood that when charging the battery, the specific charging strategy can be designed according to the actual situation. The embodiments of the present application do not focus on the specific charging strategy, as long as it can achieve battery charging.

[0135] It should be understood that the similarities between the wireless power structure circuit structure in this embodiment and the wireless power receiving circuit structure shown in FIG. 3 and FIG. 4 in the aforementioned embodiments can be referred to the relevant description in the aforementioned embodiments, and the repeated parts will not be repeated.

[0136] FIG8 exemplarily illustrates a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. As shown in FIG8 , the structure of the wireless power receiving circuit in this embodiment is substantially similar to that of the wireless power receiving circuits shown in FIG3 and FIG4 in the aforementioned embodiments, except that the DCDC converter further includes a third switch unit and a fourth switch unit. For example, as shown in FIG8 , the DCDC converter may further include a third switch unit and a fourth switch unit. The DCDC converter also includes a wired power input terminal (i.e., node P0). The third switch unit is respectively connected to the first input terminal of the first processing unit, the wired power input terminal, and the controller. The fourth switch unit is respectively connected to the first input terminal of the second processing unit, the wired power input terminal, and the controller. The controller is not shown in FIG8 , and therefore the connection relationship between the switch units and the controller is not shown. In this case, the controller is further configured to: in response to an AC signal, control the third switch unit to disconnect the wired power input terminal from the first input terminal of the first processing unit, and control the fourth switch unit to disconnect the wired power input terminal from the first input terminal of the second processing unit. The first bridge arm is also connected to the third switch unit, and the second bridge arm is also connected to the fourth switch unit. That is, node P11 can be considered a node between the third switch unit and the first input terminal of the first processing unit, and node P21 can be considered a node between the fourth switch unit and the first input terminal of the second processing unit. Therefore, nodes P11 and P21 can be considered center taps of the DC-DC converter, and node P0 can be considered an input terminal of the DC-DC converter. The first and second bridge arms are respectively connected to different center taps of the DC-DC converter. Nodes P12 and P22 are both different from the center taps. Therefore, the first and second switches are respectively connected to nodes of the DC-DC converter that are different from the center taps. This enables coordinated operation of the two bridge arms, the first and second switch units, and the DC-DC converter, reducing losses during charging and improving charging efficiency. Furthermore, the third and fourth switch units can control whether power input from the wired power input terminal is transmitted to the first and second processing units. Consequently, when wirelessly charging the battery, the third and fourth switch units can be controlled to be disconnected to prevent power input from the wired power input terminal from interfering with wireless charging, thereby improving the reliability and safety of wireless charging.

[0137] The third switch unit may include a first control switch T1, the control electrode of the first control switch T1 being connected to the controller, the first electrode of the first control switch T1 being connected to the first bridge arm and the first input terminal of the first processing unit, respectively, and the second electrode of the first control switch T1 being connected to the wired power input terminal. The fourth switch unit may include a second control switch T2, the control electrode of the second control switch T2 being connected to the controller, the first electrode of the second control switch T2 being connected to the second bridge arm and the first input terminal of the second processing unit, respectively, and the second electrode of the second control switch T2 being connected to the wired power input terminal. In this way, the controller can control whether the first and second electrodes of the first control switch T1 are conductive, thereby controlling whether the wired power input terminal is conductive with the first processing unit. Similarly, the controller can control whether the first and second electrodes of the second control switch T2 are conductive, thereby controlling whether the wired power input terminal is conductive with the second processing unit, thereby enabling the controller to control the third and fourth switch units. It should be understood that the control switch may be, but is not limited to, a switching device with a control electrode, such as a field effect transistor or a triode. The specific design can be based on actual needs and is not specifically limited here. Taking the control switch as a field effect transistor as an example, the control electrode serves as the gate, the first electrode serves as the source, and the second electrode serves as the drain.

[0138] Continuing with reference to Figure 8, the wireless power receiving circuit may further include an overvoltage protector, which is respectively connected to the wired power input terminal and the charging interface. The overvoltage protector is used to: in response to the DC signal transmitted through the charging interface being greater than a preset value, cut off the connection path between the wired power input terminal and the charging interface; in response to the DC signal transmitted through the charging interface being no greater than a preset value, connect the wired power input terminal to the charging interface; at this time, the controller is also used to: in response to the DC signal, control the third switch unit to connect the wired power input terminal to the first processing unit, so that the first processing unit charges the battery according to the DC signal; or in response to the DC signal, control the fourth switch unit to connect the wired power input terminal to the second processing unit, so that the second processing unit charges the battery according to the DC signal.

[0139] In other words, the wireless power receiving circuit can process not only the electrical energy used during wireless charging to wirelessly charge the battery, but also the electrical energy used during wired charging to wiredly charge the battery. This allows the wireless power receiving circuit to perform both wireless and wired charging, expanding its functionality and preventing the battery from being charged via wired charging when wireless charging is abnormal, thereby improving charging reliability. Furthermore, through the two bridge arms, the first switching unit, the second switching unit, and a DC-DC converter, the circuit can process both the electrical energy used during wireless charging and the electrical energy used during wired charging, achieving the integration of wireless and wired charging, simplifying the circuit structure, and reducing manufacturing costs.

[0140] It should be understood that the similarities between the wireless power structure circuit structure in this embodiment and the wireless power receiving circuit structure shown in FIG. 3 and FIG. 4 in the aforementioned embodiments can be referred to the relevant description in the aforementioned embodiments, and the repeated parts will not be repeated.

[0141] FIG9 exemplarily shows a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. As shown in FIG9 , the wireless power receiving circuit may include: a power receiver, a first bridge arm, a second bridge arm, a DCDC converter, and a controller (not shown in FIG9 ); the DCDC converter includes a processing unit; the power receiver is connected to the midpoint of the first bridge arm (i.e., node P1), and the power receiver is also connected to the midpoint of the second bridge arm (i.e., node P2), and the power receiver is used to: in response to wireless transmission of electric energy, output an AC signal to the midpoint of the first bridge arm and the midpoint of the second bridge arm; the first bridge arm also The first bridge arm and the second bridge arm are respectively connected to the processing unit, the ground terminal GND, and the controller. The second bridge arm is also respectively connected to the processing unit, the ground terminal GND, and the controller. The first bridge arm and the second bridge arm are both connected to the same input terminal (such as node P3) of the processing unit. The controller is used to: respond to the AC signal, control the first bridge arm and the second bridge arm to output the positive signal corresponding to the positive half-cycle signal in the AC signal and the negative half-cycle signal in the AC signal to the processing unit in sequence. The output terminal of the processing unit is used to be connected to the battery, and the processing unit is used to: charge the battery in response to the positive half-cycle signal of the AC signal, and charge the battery in response to the positive signal.

[0142] That is, the AC signal includes a positive half-cycle signal and a negative half-cycle signal. The two bridge arms can transmit the positive half-cycle signal and the negative half-cycle signal to the processing unit, respectively, so that the processing unit charges the battery. In other words, the processing unit can charge the battery based on the positive half-cycle signal and the positive signal corresponding to the negative half-cycle signal under the action of the two bridge arms. Therefore, through the coordinated operation of the processing unit and the two bridge arms, the battery can be charged based on the AC signal, so that the DCDC converter and the two bridge arms can play the role of AC-DC conversion. Moreover, the DCDC converter and the two bridge arms cooperate with each other during operation and are not independent of each other. Therefore, the wireless power receiving circuit provided in the embodiment of the present application is a single-stage circuit solution, and the loss existing when charging the battery is a single-stage loss. Compared with the multi-stage loss in the multi-stage circuit cascade solution, it can effectively reduce the energy loss during charging and improve the charging efficiency of the battery.

[0143] Furthermore, since both the first bridge arm and the second bridge arm are connected to the same input terminal of the processing unit, the positive half-cycle signal and the negative half-cycle signal can be transmitted to the same processing unit through the two bridge arms. This allows the processing unit to process both the positive half-cycle signal and the negative half-cycle signal, thereby achieving the purpose of processing different signals by the same processing unit. This not only improves the charging efficiency of the battery, but also simplifies the structure of the DCDC converter, thereby reducing the manufacturing cost of the wireless power receiving circuit.

[0144] The positive electrode of the power receiver (i.e., the end indicated by + in FIG9 ) is connected to the midpoint of the first bridge arm (i.e., node P1), and the negative electrode of the power receiver (i.e., the end indicated by - in FIG9 ) is connected to the midpoint of the second bridge arm (i.e., node P2), as shown in FIG9 ; alternatively, the positive electrode of the power receiver is connected to the midpoint of the second bridge arm (i.e., node P2), and the negative electrode of the power receiver is connected to the midpoint of the first bridge arm (i.e., node P1), which is not shown in the figure. This article uses the example of connecting the positive electrode of the power receiver to the midpoint of the first bridge arm (i.e., node P1) and the negative electrode of the power receiver to the midpoint of the second bridge arm (i.e., node P2) for explanation.

[0145] As shown in FIG9 , the first bridge arm may include: a first bridge arm switch Q1 and a second bridge arm switch Q2. The control electrode of the first bridge arm switch Q1 is connected to the controller, the first electrode of the first bridge arm switch Q1 is connected to the positive electrode of the power receiver (i.e., node P1) and the second electrode of the second bridge arm switch Q2, and the second electrode of the first bridge arm switch Q1 is connected to the processing unit. The control electrode of the second bridge arm switch Q2 is connected to the controller, the first electrode of the second bridge arm switch Q2 is connected to the ground terminal GND, and the second electrode of the second bridge arm switch Q2 is also connected to the positive electrode of the power receiver. The second bridge arm may include: a third bridge arm switch Q3 and a fourth bridge arm switch Q4. The control electrode of the third bridge arm switch Q3 is connected to the controller, the first electrode of the third bridge arm switch Q3 is connected to the negative electrode of the power receiver (i.e., node P2) and the second electrode of the fourth bridge arm switch Q4, and the second electrode of the third bridge arm switch Q3 is connected to the processing unit. The control electrode of the fourth bridge arm switch Q4 is connected to the controller, the first electrode of the fourth bridge arm switch Q4 is connected to the ground terminal GND, and the second electrode of the fourth bridge arm switch Q4 is also connected to the negative electrode of the power receiver.

[0146] As shown in FIG10 , the processing unit includes: a first switch M1, a second switch M2, a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a seventh switch M7, an eighth switch M8, a ninth switch M9, a first capacitor C1, a second capacitor C2, and a third capacitor C3. A control end of the first switch M1 is connected to the controller, a first end of the first switch M1 is connected to the second end of the second switch M2 and the first end of the first capacitor C1, and a second end of the first switch M1 is connected to the second end of the fourth switch M4 and the first end of the second capacitor C2. A control end of the second switch M2 is connected to the controller, a first end of the second switch M2 is connected to the ground terminal GND, and a second end of the second switch M2 is also connected to the first end of the first capacitor C1. A control end of the third switch M3 is connected to the controller, a first end of the third switch M3 is connected to the second end of the seventh switch M7 and the first end of the third capacitor C3, and a second end of the third switch M3 is connected to the second end of the first capacitor C1, the first bridge arm, and the second bridge arm, respectively. A control end of the fourth switch M4 is connected to the controller, a first end of the fourth switch M4 is connected to the first end of the fifth switch M5, and a second end of the fourth switch M5 is connected to the first end of the fifth switch M5. The first terminal of the seventh switch M7 is connected to the second terminal of the battery, the first terminal of the seventh switch M7 is connected to the second terminal of the eighth switch M8, and the second terminal of the fourth switch M4 is also connected to the first terminal of the second capacitor C2; the control terminal of the fifth switch M5 is connected to the controller, the first terminal of the fifth switch M5 is respectively connected to the second terminal of the sixth switch M6 and the second terminal of the second capacitor C2, and the second terminal of the fifth switch M5 is also connected to the battery; the control terminal of the sixth switch M6 is connected to the controller, the first terminal of the sixth switch M6 is connected to the ground terminal GND, and the second terminal of the sixth switch M6 is also connected to the second terminal of the second capacitor C2; the control terminal of the seventh switch M7 is connected to the controller, the first terminal of the seventh switch M7 is also connected to the battery, and the second terminal of the seventh switch M7 is also connected to the first terminal of the third capacitor C3; the control terminal of the eighth switch M8 is connected to the controller, the first terminal of the eighth switch M8 is respectively connected to the second terminal of the third capacitor C3 and the second terminal of the ninth switch M9, and the second terminal of the eighth switch M8 is also connected to the battery; the control terminal of the ninth switch M9 is connected to the controller, the first terminal of the ninth switch M9 is connected to the ground terminal GND, and the second terminal of the ninth switch M9 is also connected to the second terminal of the third capacitor C3.

[0147] It should be understood that, as used herein, each switch and each arm switch may be, but is not limited to, a switching device having a control terminal, such as a field-effect transistor or a triode. The specific design can be based on actual needs and is not specifically limited here. For example, in the case where the switch and arm switch are field-effect transistors, the control terminal serves as the gate, the first terminal serves as the source, and the second terminal serves as the drain.

[0148] Based on the structure shown in FIG11 , the specific operation process of the wireless power receiving circuit may include:

[0149] For the positive half-cycle of an AC signal, the controller controls each switch so that the processing unit operates in the first state, the second state, the third state, the second state, and the first state in sequence, thereby switching the processing unit between the first state, the second state, and the third state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms operate in the first mode, the second mode, and the first mode in sequence, thereby switching each bridge arm between the first mode and the second mode. The first mode includes the first state, and the second mode includes the first state, the second state, and the third state.

[0150] In the first state of the first mode (i.e., Mode 1), the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both on, and the first bridge arm switch Q1 and the third bridge arm switch Q3 are both off. The second switch M2, the third switch M3, the fourth switch M4, the sixth switch M6, and the eighth switch M8 are all on, and all other switches in the processing unit are off. At this time, in conjunction with Mode 1 shown in Figure 11, resistor R0 is used to represent a battery, and the first capacitor C1, the second capacitor C2, the third capacitor C3, and the resistor R0 used to represent the battery are all disconnected from the power receiver represented by AC. The first capacitor C1 discharges into the resistor R0, and the second capacitor C2 is connected in parallel with the resistor R0, so Vb = Vc2. It is worth noting that when Mode 1 first occurs in the processing unit, since the first capacitor C1 does not store electrical energy, Vb is approximately 0V at this time. However, as each mode cycles, when Mode 1 occurs later, electrical energy is already stored in the first capacitor C1, so the first capacitor C1 can charge the resistor R0, and Vb = Vc2 at this time.

[0151] In the first state of the second mode (i.e., Mode 2), the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, and the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the second switch M2, the third switch M3, the fourth switch M4, the sixth switch M6, and the eighth switch M8 are all on, and the other switches in the processing unit are all off. At this time, combined with Mode 2 shown in Figure 11, the second capacitor C2 and the third capacitor C3 are connected in series and then in parallel with the first capacitor C1, and the first capacitor C1 is connected in parallel with the power receiver represented by AC, and the second capacitor C2 is connected in parallel with the resistor R0 used to represent the battery, so it can be obtained that V AC =Vc1, Vc1=Vc2+Vc3 (i.e., Relationship 1).

[0152] In the second state of the second mode (i.e., mode 3), the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, and the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch M1, the fourth switch M4, the sixth switch M6, the seventh switch M7, and the ninth switch M9 are all on, and the other switches in the processing unit are all off. At this time, combined with mode 3 shown in Figure 11, the second capacitor C2, the third capacitor C3, and the resistor R0 are connected in parallel and then in series with the first capacitor C1 to form a whole. This whole is then connected in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2, Vc2=Vc3=Vb (i.e., relation 2). Combining relation 1 and relation 2, we can get V AC =3Vb.

[0153] In the third state (i.e., mode 4) of the second mode, the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch M1, the fifth switch M5, the seventh switch M7, and the ninth switch M9 are all on, and the other switches in the processing unit are all off. At this time, combined with mode 4 shown in Figure 11, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in series and then in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2+Vc3 (i.e., relation 3). Combining relation 1, relation 2, and relation 3, we can get V AC =4Vb.

[0154] Therefore, in mode 1, the charging voltage Vb provided to the battery is approximately the voltage of the second capacitor C2; in mode 2, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive half-cycle signal; in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive half-cycle signal; and in mode 4, the charging voltage Vb provided to the battery is approximately 1 / 4 of the positive half-cycle signal.

[0155] As shown in FIG11 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 1, Mode 2, Mode 3, Mode 4, Mode 3, Mode 2, and Mode 1. Specifically, during the process of increasing the value of the positive half-cycle signal from 0 to its maximum value, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 1, Mode 2, Mode 3, and Mode 4; and during the process of decreasing the value of the positive half-cycle signal from its maximum value to 0, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 4, Mode 3, Mode 2, and Mode 1. It should be understood that the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0156] For the negative half-cycle of an AC signal, the controller controls each switch so that the processing unit sequentially operates in the first state, the second state, the third state, the second state, and the first state, thereby switching the processing unit between the first state, the second state, and the third state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms sequentially operate in the first mode, the third mode, and the first mode, thereby switching each bridge arm between the first mode and the third mode. The first mode includes the first state, and the third mode includes the first state, the second state, and the third state.

[0157] In the first state of the first mode (i.e., mode 5), the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both turned on, and the first bridge arm switch Q1 and the third bridge arm switch Q3 are both turned off; the second switch M2, the third switch M3, the fourth switch M4, the sixth switch M6, and the eighth switch M8 are all turned on, and the other switches in the processing unit are all turned off; at this time, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the resistor R0 used to represent the battery have the connection relationship shown in mode 5 in Figure 11.

[0158] In the first state of the third mode (i.e., mode 6), the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the second switch M2, the third switch M3, the fourth switch M4, the sixth switch M6, and the eighth switch M8 are all turned on, and the other switches in the processing unit are all turned off. At this time, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the resistor R0 used to represent the battery have the connection relationship shown in mode 6 in Figure 11.

[0159] In the second state of the third mode (i.e., mode 7), the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the first switch M1, the fourth switch M4, the sixth switch M6, the seventh switch M7, and the ninth switch M9 are all turned on, and the other switches in the processing unit are all turned off. At this time, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the resistor R0 used to represent the battery have the connection relationship shown in mode 7 in Figure 11.

[0160] In the third state of the third mode (i.e., mode 8), the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the first switch M1, the fifth switch M5, the seventh switch M7, and the ninth switch M9 are all turned on, and the other switches in the processing unit are all turned off. At this time, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the resistor R0 used to represent the battery have the connection relationship shown in mode 8 in Figure 11.

[0161] Similarly, in mode 5, the charging voltage Vb provided to the battery is approximately the voltage of the second capacitor C2; in mode 6, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive signal corresponding to the negative half-cycle signal; in mode 7, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive signal corresponding to the negative half-cycle signal; in mode 8, the charging voltage Vb provided to the battery is approximately 1 / 4 of the positive signal corresponding to the negative half-cycle signal.

[0162] Based on this, in conjunction with Figure 11, in response to the positive signal corresponding to the negative half-cycle signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 5, Mode 6, Mode 7, Mode 8, Mode 7, Mode 6, and Mode 5. Specifically, during the process of increasing the positive signal from 0 to the maximum value of the signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 5, Mode 6, Mode 7, and Mode 8; during the process of decreasing the positive signal from the maximum value to 0, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 8, Mode 7, Mode 6, and Mode 5. It should be understood that the timing of switching between modes can be designed according to actual needs and is not specifically limited here.

[0163] In summary, based on the above-described working process, the processing unit not only charges the battery based on the positive half-cycle signal, but also charges the battery based on the positive signal corresponding to the negative half-cycle signal, and repeatedly charges the battery based on the AC signal. Furthermore, the charging voltage provided to the battery in different modes may be different, but the difference is not significant, so that the battery can be charged at a relatively stable charging voltage. It should be understood that when charging the battery, the specific charging strategy can be designed according to actual conditions. The embodiments of the present application do not focus on the specific charging strategy, as long as the battery can be charged.

[0164] As shown in FIG9 , because node P1 is connected to the positive terminal of the power receiver and node P2 is connected to the negative terminal of the power receiver, for a positive half-cycle signal, the potential of node P1 is higher than that of node P2. Therefore, when both the first arm switch Q1 and the fourth arm switch Q4 are on, node P2, which has a lower potential, is connected to ground GND, while node P1, which has a higher potential, is connected to the processing unit. In this case, the signal transmitted to the processing unit is a non-negative signal, allowing the positive half-cycle signal to be transmitted to the processing unit, allowing the processing unit to charge the battery based on the positive half-cycle signal. For a negative half-cycle signal, the potential of node P1 is lower than that of node P2. Therefore, when both the third arm switch Q3 and the second arm switch Q2 are on, node P1, which has a lower potential, is connected to ground GND, while node P2, which has a higher potential, is connected to the processing unit. In this case, the signal transmitted to the processing unit is also a non-negative signal, that is, a positive signal corresponding to the negative half-cycle signal, allowing the processing unit to charge the battery based on the positive signal.

[0165] It should be understood that in the structure described above, the controller involved can be the same controller, that is, one controller controls the two bridge arms and the DCDC converter; alternatively, in the structure described above, the controllers involved can be different controllers, that is, multiple controllers control the two bridge arms and the DCDC converter. The specific design can be based on actual needs and is not specifically limited here. The specific structure of the controller can be any device that can implement the control function known to those skilled in the art, such as but not limited to a single-chip microcomputer, an FPGA (Field Programmable Gate Array), a central processing unit, etc., and is not limited here.

[0166] FIG12 exemplarily shows a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. As shown in FIG12 , the structure of the wireless power receiving circuit in this embodiment is basically similar to that of the wireless power receiving circuit shown in FIG9 and FIG10 in the aforementioned embodiments, except that the structure of the processing unit is different. For example, as shown in FIG12 , the processing unit includes: a first switch M1, a second switch M2, a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a first capacitor C1, and a second capacitor C2; the control end of the first switch M1 is connected to the controller, the first end of the first switch M1 is respectively connected to the second end of the second switch M2 and the first end of the first capacitor C1, and the second end of the first switch M1 is respectively connected to the second end of the fourth switch M4 and the first end of the second capacitor C2; the control end of the second switch M2 is connected to the controller, the first end of the second switch M2 is connected to the ground terminal GND, and the second end of the second switch M2 is also connected to the first end of the first capacitor C1; the control end of the third switch M3 is connected to the controller, and the first end of the third switch M3 is respectively connected to the ground terminal GND. The first end of the fourth switch M4 is connected to the first end of the sixth switch M6 and the second end of the second capacitor C2, and the second end of the fifth switch M5 is also connected to the battery. The second end of the fifth switch M5 is also connected to the battery. The control end of the sixth switch M6 is connected to the controller, the first end of the sixth switch M6 is connected to the ground terminal GND, and the second end of the sixth switch M6 is also connected to the second end of the second capacitor C2.

[0167] Based on the structure shown in FIG12 , the specific operation process of the wireless power receiving circuit may include:

[0168] For the positive half-cycle of an AC signal, the controller controls each switch so that the processing unit operates in the first state, the second state, the third state, the second state, and the first state in sequence, thereby switching the processing unit between the first state, the second state, and the third state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms operate in the first mode, the second mode, and the first mode in sequence, thereby switching each bridge arm between the first mode and the second mode. The first mode includes the first state, and the second mode includes the first state, the second state, and the third state.

[0169] In the first state of the first mode (i.e., Mode 1), the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both on, while the first bridge arm switch Q1 and the third bridge arm switch Q3 are both off. The second switch M2, the third switch M3, the fourth switch M4, and the sixth switch M6 are all on, and all other switches in the processing unit are off. At this point, referring to Mode 1 shown in FIG13 , resistor R0 represents a battery, the first capacitor C1, the second capacitor C2, and the resistor R0 representing the battery are all disconnected from the power receiver represented by AC. The first capacitor C1, the second capacitor C2, and the resistor R0 are connected in parallel, so Vb = Vc2 = Vc1.

[0170] In the first state of the second mode (i.e., mode 2), the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the second switch M2, the third switch M3, the fourth switch M4, and the sixth switch M6 are all on, and the other switches in the processing unit are all off. At this time, combined with mode 2 shown in Figure 13, the first capacitor C1, the second capacitor C2, the resistor R0 representing the battery, and the power receiver represented by AC are connected in parallel, so it can be obtained that V AC =Vc1=Vc2=Vb.

[0171] In the second state of the second mode (i.e., mode 3), the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, and the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch M1, the fourth switch M4, and the sixth switch M6 are all on, and the other switches in the processing unit are all off. At this time, combined with mode 3 shown in Figure 13, the second capacitor C2 and the resistor R0 are connected in parallel and then in series with the first capacitor C1 to form a whole. This whole is then connected in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2, and then we can get V AC =2Vb.

[0172] In the third state (i.e., mode 4) of the second mode, the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch M1 and the fifth switch M5 are both on, and the other switches in the processing unit are all off. At this time, combined with mode 4 shown in Figure 13, the second capacitor C2, the resistor R0, and the first capacitor C1 are connected in series and then in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2+Vb, and then we can get V AC =3Vb.

[0173] Therefore, in mode 1, the charging voltage Vb provided to the battery is approximately the voltage of the second capacitor C2; in mode 2, the charging voltage Vb provided to the battery is approximately the positive half-cycle signal; in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive half-cycle signal; and in mode 4, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive half-cycle signal.

[0174] As shown in FIG13 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 1, Mode 2, Mode 3, Mode 4, Mode 3, Mode 2, and Mode 1. Specifically, during the process of increasing the value of the positive half-cycle signal from 0 to its maximum value, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 1, Mode 2, Mode 3, and Mode 4; during the process of decreasing the value of the positive half-cycle signal from its maximum value to 0, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 4, Mode 3, Mode 2, and Mode 1. It should be understood that the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0175] For the negative half-cycle of an AC signal, the controller controls each switch so that the processing unit sequentially operates in the first state, the second state, the third state, the second state, and the first state, thereby switching the processing unit between the first state, the second state, and the third state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms sequentially operate in the first mode, the third mode, and the first mode, thereby switching each bridge arm between the first mode and the third mode. The first mode includes the first state, and the third mode includes the first state, the second state, and the third state.

[0176] In the first state of the first mode (i.e., mode 5), the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both turned on, and the first bridge arm switch Q1 and the third bridge arm switch Q3 are both turned off; the second switch M2, the third switch M3, the fourth switch M4, and the sixth switch M6 are all turned on, and the other switches in the processing unit are all turned off. At this time, the first capacitor C1, the second capacitor C2, and the resistor R0 used to represent the battery have the connection relationship shown in mode 5 in Figure 13.

[0177] In the first state of the third mode (i.e., mode 6), the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the second switch M2, the third switch M3, the fourth switch M4, and the sixth switch M6 are all turned on, and the other switches in the processing unit are all turned off. At this time, the first capacitor C1, the second capacitor C2, and the resistor R0 used to represent the battery have the connection relationship shown in mode 6 in Figure 13.

[0178] In the second state of the third mode (i.e., mode 7), the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the first switch M1, the fourth switch M4, and the sixth switch M6 are all turned on, and the other switches in the processing unit are all turned off. At this time, the first capacitor C1, the second capacitor C2, and the resistor R0 used to represent the battery have the connection relationship shown in mode 7 in Figure 13.

[0179] In the third state of the third mode (i.e., mode 8), the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned on, and the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both turned off; the first switch M1 and the fifth switch M5 are both turned on, and the other switches in the processing unit are all turned off. At this time, the first capacitor C1, the second capacitor C2, and the resistor R0 used to represent the battery have the connection relationship shown in mode 8 in Figure 13.

[0180] Similarly, in mode 5, the charging voltage Vb provided to the battery is approximately the voltage of the second capacitor C2; in mode 6, the charging voltage Vb provided to the battery is approximately the positive signal corresponding to the negative half-cycle signal; in mode 7, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive signal corresponding to the negative half-cycle signal; in mode 8, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive signal corresponding to the negative half-cycle signal.

[0181] Based on this, in conjunction with Figure 13, in response to the positive signal corresponding to the negative half-cycle signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 5, Mode 6, Mode 7, Mode 8, Mode 7, Mode 6, and Mode 5. Specifically, during the process of increasing the positive signal from 0 to the maximum value of the signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 5, Mode 6, Mode 7, and Mode 8; during the process of decreasing the positive signal from the maximum value to 0, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 8, Mode 7, Mode 6, and Mode 5. It should be understood that the switching timing between the modes can be designed according to actual needs and is not specifically limited here.

[0182] In summary, based on the above-described working process, the processing unit not only charges the battery based on the positive half-cycle signal, but also charges the battery based on the positive signal corresponding to the negative half-cycle signal, and repeatedly charges the battery based on the AC signal. Furthermore, the charging voltage provided to the battery in different modes may be different, but the difference is not significant, so that the battery can be charged at a relatively stable charging voltage. It should be understood that when charging the battery, the specific charging strategy can be designed according to actual conditions. The embodiments of the present application do not focus on the specific charging strategy, as long as the battery can be charged.

[0183] It should be understood that the similarities between the wireless power structure circuit structure in this embodiment and the wireless power receiving circuit structure shown in FIG. 9 and FIG. 10 in the aforementioned embodiments can be referred to the relevant description in the aforementioned embodiments, and the repeated parts will not be repeated.

[0184] FIG14 exemplarily shows a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. As shown in FIG14 , the structure of the wireless power receiving circuit in this embodiment is basically similar to that of the wireless power receiving circuit shown in FIG9 and FIG10 in the aforementioned embodiments, except that the structure of the processing unit is different. For example, as shown in FIG14 , the processing unit includes: a first switch M1, a second switch M2, a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a first capacitor C1, and a second capacitor C2; a control end of the first switch M1 is connected to the controller, a first end of the first switch M1 is respectively connected to the second end of the second switch M2 and the first end of the first capacitor C1, and a second end of the first switch M1 is respectively connected to the first end of the fourth switch M4, the second end of the fifth switch M5, and the battery; a control end of the second switch M2 is connected to the controller, a first end of the second switch M2 is connected to the ground terminal GND, and a second end of the second switch M2 is also connected to the first end of the first capacitor C1; a control end of the third switch M3 is connected to the controller, and a first end of the third switch M3 is connected to the ground terminal GND. One end is respectively connected to the second end of the fourth switch M4 and the first end of the second capacitor C2, and the second end of the third switch M3 is respectively connected to the second end of the first capacitor C1, the first bridge arm, and the second bridge arm; a control end of the fourth switch M4 is connected to the controller, the first end of the fourth switch M4 is also connected to the battery, and the second end of the fourth switch M4 is also connected to the first end of the second capacitor C2; a control end of the fifth switch M5 is connected to the controller, the first end of the fifth switch M5 is respectively connected to the second end of the sixth switch M6 and the second end of the second capacitor C2, and the second end of the fifth switch M5 is also connected to the battery; a control end of the sixth switch M6 is connected to the controller, the first end of the sixth switch M6 is connected to the ground terminal GND, and the second end of the sixth switch M6 is also connected to the second end of the second capacitor C2.

[0185] Based on the structure shown in FIG14 , the specific operation process of the wireless power receiving circuit may include:

[0186] For the positive half-cycle of an AC signal: the controller controls each switch so that the processing unit operates in the first state, the second state, the third state, the second state, and the first state in sequence, thereby switching the processing unit between the first state, the second state, and the third state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms operate in the first mode, the second mode, and the first mode in sequence, thereby switching each bridge arm between the first mode and the second mode. The first mode includes the first state, and the second mode includes the second state and the third state.

[0187] In the first state of the first mode (i.e., Mode 1), the second bridge arm switch Q2 and the fourth bridge arm switch Q4 are both on, while the first bridge arm switch Q1 and the third bridge arm switch Q3 are both off. The second switch M2, the fourth switch M4, and the sixth switch M6 are all on, and all other switches in the processing unit are off. At this point, referring to Mode 1 shown in FIG15 , resistor R0 represents the battery, the first capacitor C1, the second capacitor C2, and the resistor R0 representing the battery are all disconnected from the power receiver represented by AC, and the second capacitor C2 is connected in parallel with resistor R0, so Vb = Vc2.

[0188] In the second state of the second mode (i.e., mode 2), the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the second switch M2, the third switch M3, and the fifth switch M5 are all on, and the other switches in the processing unit are all off. At this time, combined with mode 2 shown in Figure 15, the second capacitor C2 and the resistor R0 are connected in series and then in parallel with the first capacitor C1. The first capacitor C1 is connected in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1, Vc1=Vc2+Vb, and then we can get V AC =2Vb.

[0189] In the third state (i.e., mode 3) of the second mode, the first bridge arm switch Q1 and the fourth bridge arm switch Q4 are both on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both off; the first switch M1, the fourth switch M4, and the sixth switch M6 are all on, and the other switches in the processing unit are all off. At this time, combined with mode 3 shown in Figure 15, the second capacitor C2 is connected in parallel with the resistor R0 and then in series with the first capacitor C1 to form a whole. This whole is then connected in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2, and then we can get V AC =3Vb.

[0190] Therefore, in mode 1, the charging voltage Vb provided to the battery is approximately the voltage of the second capacitor C2; in mode 2, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive half-cycle signal; and in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive half-cycle signal.

[0191] As shown in FIG15 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 1, Mode 2, Mode 3, Mode 2, and Mode 1. Specifically, during the process of increasing from 0 in the positive half-cycle signal to the maximum value of the signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 1, Mode 2, and Mode 3; during the process of decreasing from the maximum value of the signal in the positive half-cycle signal to 0, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 3, Mode 2, and Mode 1. It should be understood that the timing of switching between modes can be designed according to actual needs and is not specifically limited here.

[0192] For the negative half-cycle of an AC signal, the controller controls each switch so that the processing unit sequentially operates in the first state, the second state, the third state, the second state, and the first state, thereby switching the processing unit between the first state, the second state, and the third state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms sequentially operate in the first mode, the third mode, and the first mode, thereby switching each bridge arm between the first mode and the third mode. The first mode includes the first state, and the third mode includes the second state and the third state.

[0193] In the first state of the first mode (i.e., Mode 4), the second and fourth bridge arm switches Q2 and Q4 are both on, while the first and third bridge arm switches Q1 and Q3 are both off. The second, fourth, and sixth switches M2, M4, and M6 are all on, while all other switches in the processing unit are off. At this point, the first capacitor C1, the second capacitor C2, and the resistor R0 representing the battery exhibit the connection relationship shown in Mode 4 in FIG. 15 .

[0194] In the second state of the third mode (i.e., Mode 5), the second and third bridge arm switches Q2 and Q3 are both on, while the first and fourth bridge arm switches Q1 and Q4 are both off. The second, third, and fifth switches M2, M3, and M5 are all on, while all other switches in the processing unit are off. At this point, the first capacitor C1, the second capacitor C2, and the resistor R0 representing the battery exhibit the connection relationship shown in Mode 5 in Figure 15.

[0195] In the third state of the third mode (i.e., Mode 6), the second and third bridge arm switches Q2 and Q3 are both on, while the first and fourth bridge arm switches Q1 and Q4 are both off. The first, fourth, and sixth switches M1, M4, and M6 are all on, while all other switches in the processing unit are off. At this point, the first capacitor C1, the second capacitor C2, and the resistor R0 representing the battery exhibit the connection relationship shown in Mode 6 in FIG. 15 .

[0196] Similarly, in mode 4, the charging voltage Vb provided to the battery is approximately the voltage of the second capacitor C2; in mode 5, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive signal corresponding to the negative half-cycle signal; and in mode 6, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive signal corresponding to the negative half-cycle signal.

[0197] Based on this, in conjunction with FIG15 , in response to a positive signal corresponding to a negative half-cycle signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 4, Mode 5, Mode 6, Mode 5, and Mode 4. Specifically, during the process of increasing the positive signal from 0 to the maximum value of the signal, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 4, Mode 5, and Mode 6; during the process of decreasing the positive signal from the maximum value to 0, the entire system consisting of the two bridge arms and the processing unit sequentially operates in Mode 6, Mode 5, and Mode 4. It should be understood that the switching timing between the modes can be designed according to actual needs and is not specifically limited here.

[0198] In summary, based on the above-described working process, the processing unit not only charges the battery based on the positive half-cycle signal, but also charges the battery based on the positive signal corresponding to the negative half-cycle signal, and repeatedly charges the battery based on the AC signal. Furthermore, the charging voltage provided to the battery in different modes may be different, but the difference is not significant, so that the battery can be charged at a relatively stable charging voltage. It should be understood that when charging the battery, the specific charging strategy can be designed according to actual conditions. The embodiments of the present application do not focus on the specific charging strategy, as long as the battery can be charged.

[0199] It should be understood that the similarities between the wireless power structure circuit structure in this embodiment and the wireless power receiving circuit structure shown in FIG. 9 and FIG. 10 in the aforementioned embodiments can be referred to the relevant description in the aforementioned embodiments, and the repeated parts will not be repeated.

[0200] FIG16 exemplarily illustrates a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. Referring to FIG16 , the structure of the wireless power receiving circuit in this embodiment is substantially similar to that of the wireless power receiving circuits shown in FIG9 and FIG10 in the aforementioned embodiments, except that the DC-DC converter further includes a switch unit. For example, referring to FIG16 , the DC-DC converter further includes a switch unit and a wired power input terminal. The switch unit is respectively connected to the processing unit, the wired power input terminal, and the controller. The switch unit, the first bridge arm, and the second bridge arm are all connected to the same input terminal of the processing unit. The controller is further configured to, in response to an AC signal, control the switch unit to disconnect the wired power input terminal from the processing unit. FIG16 does not show the controller, and therefore does not show the connection relationship between the switch units and the controller. That is, node P3 can be considered a node between the switch unit and the processing unit, and therefore node P3 can be considered a center tap of the DC-DC converter. The first bridge arm and the second bridge arm are connected to the same center tap of the DC-DC converter, thereby enabling coordinated operation of the two bridge arms and the DC-DC converter, reducing losses during charging and improving charging efficiency. In addition, the switch unit can control whether the electric energy input from the wired power input end is transmitted to the processing unit, and then when the battery is charged wirelessly, the switch unit can be controlled to disconnect, so as to avoid the electric energy input from the wired power input end interfering with the wireless charging, thereby improving the reliability and safety of wireless charging.

[0201] The switch unit may include a first control switch T1, wherein the control electrode of the first control switch T1 is connected to the controller, the first electrode of the first control switch T1 is respectively connected to the first bridge arm, the second bridge arm, and the processing unit, and the second electrode of the first control switch T1 is connected to the wired power input terminal. In this way, the controller can control whether the first electrode and the second electrode of the first control switch T1 are conductive, and further control whether the wired power input terminal and the processing unit are conductive, thereby realizing the controller's control over the switch unit. It should be understood that the control switch may be, but is not limited to, a switching device with a control terminal, such as a field effect transistor or a triode. The specific design can be based on actual needs and is not specifically limited here. Taking the control switch as a field effect transistor as an example, the control electrode serves as the gate, the first electrode serves as the source, and the second electrode serves as the drain.

[0202] Continuing with reference to Figure 16, the wireless power receiving circuit may further include an overvoltage protector, which is respectively connected to the wired power input terminal and the charging interface. The overvoltage protector is used to: in response to a DC signal transmitted through the charging interface being greater than a preset value, cut off the connection path between the wired power input terminal and the charging interface; in response to a DC signal transmitted through the charging interface being no greater than a preset value, connect the wired power input terminal to the charging interface; at this time, the controller is also used to: in response to the DC signal, control the switch unit to connect the wired power input terminal to the processing unit, so that the processing unit charges the battery according to the DC signal.

[0203] In other words, the wireless power receiving circuit can process not only the electrical energy used during wireless charging to wirelessly charge the battery, but also the electrical energy used during wired charging to wiredly charge the battery. This allows the wireless power receiving circuit to achieve both wireless and wired charging, expanding its functionality and preventing the battery from being charged via wired charging when wireless charging is abnormal, thereby improving charging reliability. Furthermore, through two bridge arms and a DCDC converter, electrical energy can be processed for both wireless and wired charging, achieving the integration of wireless and wired charging, simplifying the circuit structure, and reducing manufacturing costs.

[0204] It should be understood that the similarities between the wireless power structure circuit structure in this embodiment and the wireless power receiving circuit structure shown in FIG. 9 and FIG. 10 in the aforementioned embodiments can be referred to the relevant description in the aforementioned embodiments, and the repeated parts will not be repeated.

[0205] It should be understood that no battery is shown in Figures 4, 6, 10, 12, and 14, but this does not mean that there is no connection with the battery. The arrow Vb in these figures means that the position is connected to the battery, but the battery is not drawn in these figures.

[0206] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include such modifications and variations.

Claims

1. A wireless power receiving circuit, characterized in that: include: A power receiver, a first bridge arm, a second bridge arm, a first switch unit, a second switch unit, a DCDC converter and a controller; the DCDC converter includes a first processing unit and a second processing unit; The power receiver is connected to the midpoint of the first bridge arm and the first switch unit respectively, and is also connected to the midpoint of the second bridge arm and the second switch unit respectively, and the power receiver is configured to: output an AC signal to the midpoint of the first bridge arm, the midpoint of the second bridge arm, the first switch unit, and the second switch unit in response to wireless power transmission; The first bridge arm is further connected to the first input terminal of the first processing unit, the ground terminal, and the controller respectively, and the second bridge arm is further connected to the first input terminal of the second processing unit, the ground terminal, and the controller respectively; the first switch unit is further connected to the second input terminal of the first processing unit, and the first input terminal of the first processing unit is different from the second input terminal of the first processing unit; the second switch unit is further connected to the second input terminal of the second processing unit, and the first input terminal of the second processing unit is different from the second input terminal of the second processing unit; The positive half-cycle signal of the AC signal includes a first partial signal and a second partial signal, and the negative half-cycle signal of the AC signal includes a third partial signal and a fourth partial signal. The controller is configured to: in response to the first partial signal in the positive half-cycle signal, control the first bridge arm and the second bridge arm to output the first partial signal to the first processing unit; in response to the second partial signal in the positive half-cycle signal, control the second bridge arm and the first switch unit to output the second partial signal to the first processing unit; in response to the third partial signal in the negative half-cycle signal, control the first bridge arm and the second bridge arm to output a first positive signal corresponding to the third partial signal to the second processing unit; and in response to the fourth partial signal in the negative half-cycle signal, control the first bridge arm and the second switch unit to output a second positive signal corresponding to the fourth partial signal to the second processing unit; The output end of the first processing unit is used to connect to the battery. Under the action of the first part of the signal, the multiple capacitors in the first processing unit, the power receiver, and the battery have a first connection relationship. Under the action of the second part of the signal, the multiple capacitors in the first processing unit, the power receiver, and the battery have a second connection relationship, and the first connection relationship and the second connection relationship are different. The output end of the second processing unit is used to connect to the battery. Under the action of the first positive signal, a third connection relationship is presented between the multiple capacitors in the second processing unit, the power receiver and the battery. Under the action of the second positive signal, a fourth connection relationship is presented between the multiple capacitors in the second processing unit, the power receiver and the battery. The third connection relationship is different from the fourth connection relationship.

2. The wireless power receiving circuit according to claim 1, wherein: The DCDC converter further includes a third switch unit and a fourth switch unit. The DCDC converter further includes a wired power input terminal. The third switch unit is connected to the first input terminal of the first processing unit, the wired power input terminal, and the controller respectively. The fourth switch unit is connected to the first input terminal of the second processing unit, the wired power input terminal, and the controller respectively. The controller is further configured to: in response to the AC signal, control the third switch unit to disconnect the wired power input terminal from the first input terminal of the first processing unit, and control the fourth switch unit to disconnect the wired power input terminal from the first input terminal of the second processing unit; The first bridge arm is further connected to the third switch unit, and the second bridge arm is further connected to the fourth switch unit.

3. The wireless power receiving circuit according to claim 1 or 2, wherein: The first bridge arm includes: a first bridge arm switch and a second bridge arm switch, wherein the control electrode of the first bridge arm switch is connected to the controller, the first electrode of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second electrode of the second bridge arm switch, and the second electrode of the first bridge arm switch is connected to the first input terminal of the first processing unit; the control electrode of the second bridge arm switch is connected to the controller, the first electrode of the second bridge arm switch is connected to the ground terminal, and the second electrode of the second bridge arm switch is also connected to the positive electrode of the power receiver; The second bridge arm includes: a third bridge arm switch and a fourth bridge arm switch, wherein the control electrode of the third bridge arm switch is connected to the controller, the first electrode of the third bridge arm switch is respectively connected to the negative electrode of the power receiver and the second electrode of the fourth bridge arm switch, and the second electrode of the third bridge arm switch is connected to the first input end of the second processing unit; the control electrode of the fourth bridge arm switch is connected to the controller, the first electrode of the fourth bridge arm switch is connected to the ground end, and the second electrode of the fourth bridge arm switch is also connected to the negative electrode of the power receiver; The controller is configured to: in response to the first partial signal, control the first bridge arm and the second bridge arm to switch between a first mode and a second mode; in response to the first positive signal, control the first bridge arm and the second bridge arm to switch between the first mode and a third mode; Among them, the first mode includes: a mode in which the second bridge arm switch and the fourth bridge arm switch are both turned on, the second mode includes: a mode in which the first bridge arm switch and the fourth bridge arm switch are both turned on, and the third mode includes: a mode in which the second bridge arm switch and the third bridge arm switch are both turned on.

4. The wireless power receiving circuit according to claim 3, wherein: The first switch unit includes a first switch, a control electrode of the first switch is connected to the controller, a first electrode of the first switch is connected to the second input terminal of the first processing unit, and a second electrode of the first switch is connected to the positive electrode of the power receiver; The second switch unit includes a second switch, a control electrode of the second switch is connected to the controller, a first electrode of the second switch is connected to the second input terminal of the second processing unit, and a second electrode of the second switch is connected to the negative electrode of the power receiver; The controller is configured to: in response to the second part of the signal, control the second bridge arm and the first switch unit to be in a fourth mode; In response to the second positive signal, controlling the first bridge arm and the second switch unit to be in a fifth mode; The fourth mode includes: a mode in which the fourth bridge arm switch and the first switch are both turned on; the fifth mode includes: a mode in which the second bridge arm switch and the second switch are both turned on; The fourth mode exists between the first mode and the second mode, and the fifth mode exists between the first mode and the third mode.

5. The wireless power receiving circuit according to claim 4, wherein: The first processing unit includes: a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a first capacitor, a second capacitor, and a third capacitor; A control end of the third switch is connected to the controller, a first end of the third switch is respectively connected to the second end of the fourth switch, the first end of the first capacitor, and the first switch unit, and a second end of the third switch is respectively connected to the second end of the sixth switch and the first end of the second capacitor; A control end of the fourth switch is connected to the controller, a first end of the fourth switch is connected to the ground end, and a second end of the fourth switch is further connected to the first end of the first capacitor and the first switch unit respectively; The control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the ninth switch and the first end of the third capacitor, and the second end of the fifth switch is respectively connected to the second end of the first capacitor and the first bridge arm; a control end of the sixth switch connected to the controller, a first end of the sixth switch connected to the second end of the seventh switch, the battery, the first end of the ninth switch, and the second end of the tenth switch, respectively, and a second end of the sixth switch further connected to the first end of the second capacitor; A control end of the seventh switch is connected to the controller, a first end of the seventh switch is connected to the second end of the eighth switch and the second end of the second capacitor respectively, and a second end of the seventh switch is further connected to the battery; The control end of the eighth switch is connected to the controller, the first end of the eighth switch is connected to the ground end, and the second end of the eighth switch is also connected to the second end of the second capacitor; The control end of the ninth switch is connected to the controller, the first end of the ninth switch is also connected to the battery, and the second end of the ninth switch is also connected to the first end of the third capacitor; The control end of the tenth switch is connected to the controller, the first end of the tenth switch is connected to the second end of the third capacitor and the second end of the eleventh switch respectively, and the second end of the tenth switch is also connected to the battery; The control end of the eleventh switch is connected to the controller, the first end of the eleventh switch is connected to the ground end, and the second end of the eleventh switch is also connected to the second end of the third capacitor.

6. The wireless power receiving circuit according to claim 5, wherein: The controller is further configured to: in response to the positive half-cycle signal, control the first processing unit to switch between a first state, a second state, and a third state; The first state includes: a state in which the fourth switch, the fifth switch, the sixth switch, the eighth switch, and the tenth switch are all turned on; the second state includes: a state in which the third switch, the sixth switch, the eighth switch, the ninth switch, and the eleventh switch are all turned on; and the third state includes: a state in which the third switch, the seventh switch, the ninth switch, and the eleventh switch are all turned on. The first mode includes the first state, the fourth mode includes the second state, and the second mode includes: the first state, the second state, and the third state.

7. The wireless power receiving circuit according to any one of claims 4 to 6, wherein: The second processing unit includes: a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a nineteenth switch, a twentieth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; The control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is respectively connected to the second end of the thirteenth switch, the first end of the fourth capacitor, and the second switch unit, and the second end of the twelfth switch is respectively connected to the second end of the fifteenth switch and the first end of the fifth capacitor; The control end of the thirteenth switch is connected to the controller, the first end of the thirteenth switch is connected to the ground end, and the second end of the thirteenth switch is further connected to the first end of the fourth capacitor and the second switch unit respectively; The control end of the fourteenth switch is connected to the controller, the first end of the fourteenth switch is respectively connected to the second end of the eighteenth switch and the first end of the sixth capacitor, and the second end of the fourteenth switch is respectively connected to the second end of the fourth capacitor and the second bridge arm; a control end of the fifteenth switch connected to the controller, a first end of the fifteenth switch connected to the second end of the sixteenth switch, the battery, the first end of the eighteenth switch, and the second end of the nineteenth switch, respectively, and a second end of the fifteenth switch further connected to the first end of the fifth capacitor; A control end of the sixteenth switch is connected to the controller, a first end of the sixteenth switch is connected to the second end of the seventeenth switch and the second end of the fifth capacitor, and a second end of the sixteenth switch is further connected to the battery; The control end of the seventeenth switch is connected to the controller, the first end of the seventeenth switch is connected to the ground end, and the second end of the seventeenth switch is also connected to the second end of the fifth capacitor; A control end of the eighteenth switch is connected to the controller, a first end of the eighteenth switch is further connected to the battery, and a second end of the eighteenth switch is further connected to the first end of the sixth capacitor; A control end of the nineteenth switch is connected to the controller, a first end of the nineteenth switch is connected to the second end of the sixth capacitor and the second end of the twentieth switch respectively, and a second end of the nineteenth switch is further connected to the battery; The control end of the 20th switch is connected to the controller, the first end of the 20th switch is connected to the ground end, and the second end of the 20th switch is also connected to the second end of the sixth capacitor.

8. The wireless power receiving circuit according to claim 7, wherein: The controller is further configured to: control the second processing unit to switch between a fourth state, a fifth state, and a sixth state in response to the first positive signal and the second positive signal; The fourth state includes a state in which the thirteenth switch, the fourteenth switch, the fifteenth switch, the seventeenth switch, and the nineteenth switch are all turned on; the fifth state includes a state in which the twelfth switch, the fifteenth switch, the seventeenth switch, the eighteenth switch, and the twentieth switch are all turned on; and the sixth state includes a state in which the twelfth switch, the sixteenth switch, the eighteenth switch, and the twentieth switch are all turned on. The first mode includes the fourth state, the fifth mode includes the fifth state, and the third mode includes: the fourth state, the fifth state, and the sixth state.

9. The wireless power receiving circuit according to claim 4, wherein: The first processing unit includes: a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a first capacitor and a second capacitor; A control end of the third switch is connected to the controller, a first end of the third switch is respectively connected to the second end of the fourth switch, the first end of the first capacitor, and the first switch unit, and a second end of the third switch is respectively connected to the first end of the sixth switch, the second end of the seventh switch, and the battery; A control end of the fourth switch is connected to the controller, a first end of the fourth switch is connected to the ground end, and a second end of the fourth switch is further connected to the first end of the first capacitor and the first switch unit respectively; The control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the first end of the second capacitor, and the second end of the fifth switch is respectively connected to the second end of the first capacitor and the first bridge arm; The control end of the sixth switch is connected to the controller, the first end of the sixth switch is also connected to the battery, and the second end of the sixth switch is also connected to the first end of the second capacitor; A control end of the seventh switch is connected to the controller, a first end of the seventh switch is connected to the second end of the eighth switch and the second end of the second capacitor respectively, and a second end of the seventh switch is further connected to the battery; The control end of the eighth switch is connected to the controller, the first end of the eighth switch is connected to the ground end, and the second end of the eighth switch is also connected to the second end of the second capacitor.

10. The wireless power receiving circuit according to claim 9, wherein: The controller is further configured to: in response to the positive half-cycle signal, control the first processing unit to switch between a first state, a second state, and a third state; The first state includes: a state in which the fourth switch, the sixth switch, and the eighth switch are all turned on; the second state includes: a state in which the fourth switch, the fifth switch, and the seventh switch are all turned on; and the third state includes: a state in which the third switch, the sixth switch, and the eighth switch are all turned on. The first mode includes the first state, the fourth mode includes the first state, and the second mode includes the second state and the third state.

11. The wireless power receiving circuit according to claim 4, 9 or 10, wherein: The second processing unit includes: a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a third capacitor, and a fourth capacitor; A control end of the ninth switch is connected to the controller, a first end of the ninth switch is respectively connected to the second end of the tenth switch, the first end of the third capacitor, and the second switch unit, and a second end of the ninth switch is respectively connected to the first end of the twelfth switch, the second end of the thirteenth switch, and the battery; The control end of the tenth switch is connected to the controller, the first end of the tenth switch is connected to the ground end, and the second end of the tenth switch is further connected to the first end of the third capacitor and the second switch unit respectively; The control end of the eleventh switch is connected to the controller, the first end of the eleventh switch is respectively connected to the second end of the twelfth switch and the first end of the fourth capacitor, and the second end of the eleventh switch is respectively connected to the second end of the third capacitor and the second bridge arm; The control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is also connected to the battery, and the second end of the twelfth switch is also connected to the first end of the fourth capacitor; a control end of the thirteenth switch connected to the controller, a first end of the thirteenth switch connected to the second end of the fourteenth switch and the second end of the fourth capacitor, respectively, and a second end of the thirteenth switch further connected to the battery; The control end of the fourteenth switch is connected to the controller, the first end of the fourteenth switch is connected to the ground end, and the second end of the fourteenth switch is also connected to the second end of the fourth capacitor.

12. The wireless power receiving circuit according to claim 11, wherein: The controller is further configured to: control the second processing unit to switch between a fourth state, a fifth state, and a sixth state in response to the first positive signal and the second positive signal; The fourth state includes: a state in which the tenth switch, the twelfth switch, and the fourteenth switch are all turned on; the fifth state includes: a state in which the tenth switch, the eleventh switch, and the thirteenth switch are all turned on; and the sixth state includes: a state in which the ninth switch, the twelfth switch, and the fourteenth switch are all turned on. The first mode includes the fourth state, the fifth mode includes the fourth state, and the third mode includes: the fifth state and the sixth state.

13. A wireless power receiving circuit, characterized in that: include: A power receiver, a first bridge arm, a second bridge arm, a DCDC converter and a controller; the DCDC converter includes a processing unit; The power receiver is connected to the midpoint of the first bridge arm, and is also connected to the midpoint of the second bridge arm, and is configured to: output an AC signal to the midpoint of the first bridge arm and the midpoint of the second bridge arm in response to wireless power transmission; The first bridge arm is further connected to the processing unit, the ground terminal, and the controller respectively, and the second bridge arm is further connected to the processing unit, the ground terminal, and the controller respectively, and the first bridge arm and the second bridge arm are both connected to the same input terminal of the processing unit; the controller is configured to: in response to the AC signal, control the first bridge arm and the second bridge arm to sequentially output positive signals corresponding to the positive half-cycle signal in the AC signal and the negative half-cycle signal in the AC signal to the processing unit; The output end of the processing unit is used to be connected to a battery, and the processing unit is used to charge the battery in response to a positive half-cycle signal of the AC signal, and to charge the battery in response to the positive signal.

14. The wireless power receiving circuit according to claim 13, wherein: The DCDC converter further includes: a switch unit and a wired power input terminal, wherein the switch unit is connected to the processing unit, the wired power input terminal, and the controller respectively, and the switch unit, the first bridge arm, and the second bridge arm are all connected to the same input terminal of the processing unit; The controller is further configured to: in response to the AC signal, control the switch unit to disconnect the wired power input terminal from the processing unit.

15. The wireless power receiving circuit according to claim 13 or 14, wherein: The first bridge arm includes: a first bridge arm switch and a second bridge arm switch, wherein the control electrode of the first bridge arm switch is connected to the controller, the first electrode of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second electrode of the second bridge arm switch, and the second electrode of the first bridge arm switch is connected to the processing unit; the control electrode of the second bridge arm switch is connected to the controller, the first electrode of the second bridge arm switch is connected to the ground terminal, and the second electrode of the second bridge arm switch is also connected to the positive electrode of the power receiver; The second bridge arm includes: a third bridge arm switch and a fourth bridge arm switch, wherein the control electrode of the third bridge arm switch is connected to the controller, the first electrode of the third bridge arm switch is respectively connected to the negative electrode of the power receiver and the second electrode of the fourth bridge arm switch, and the second electrode of the third bridge arm switch is connected to the processing unit; the control electrode of the fourth bridge arm switch is connected to the controller, the first electrode of the fourth bridge arm switch is connected to the ground terminal, and the second electrode of the fourth bridge arm switch is also connected to the negative electrode of the power receiver; The controller is configured to: in response to the positive half-cycle signal, control the first bridge arm and the second bridge arm to switch between the first mode and the second mode; in response to the positive signal, control the first bridge arm and the second bridge arm to switch between the first mode and the third mode; Among them, the first mode includes: a mode in which the second bridge arm switch and the fourth bridge arm switch are both turned on, the second mode includes: a mode in which the first bridge arm switch and the fourth bridge arm switch are both turned on, and the third mode includes: a mode in which the second bridge arm switch and the third bridge arm switch are both turned on.

16. The wireless power receiving circuit according to claim 15, wherein: The processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a first capacitor, a second capacitor and a third capacitor; The control end of the first switch is connected to the controller, the first end of the first switch is connected to the second end of the second switch and the first end of the first capacitor respectively, and the second end of the first switch is connected to the second end of the fourth switch and the first end of the second capacitor respectively; The control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is further connected to the first end of the first capacitor; The control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the seventh switch and the first end of the third capacitor, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; A control end of the fourth switch is connected to the controller, a first end of the fourth switch is respectively connected to the second end of the fifth switch, the battery, the first end of the seventh switch, and the second end of the eighth switch, and a second end of the fourth switch is further connected to the first end of the second capacitor; The control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the second end of the sixth switch and the second end of the second capacitor respectively, and the second end of the fifth switch is also connected to the battery; The control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground end, and the second end of the sixth switch is further connected to the second end of the second capacitor; The control end of the seventh switch is connected to the controller, the first end of the seventh switch is also connected to the battery, and the second end of the seventh switch is also connected to the first end of the third capacitor; A control end of the eighth switch is connected to the controller, a first end of the eighth switch is connected to the second end of the third capacitor and the second end of the ninth switch respectively, and a second end of the eighth switch is further connected to the battery; The control end of the ninth switch is connected to the controller, the first end of the ninth switch is connected to the ground end, and the second end of the ninth switch is also connected to the second end of the third capacitor.

17. The wireless power receiving circuit according to claim 16, wherein: The controller is further configured to: control the processing unit to switch between a first state, a second state, and a third state in response to the positive half-cycle signal; and control the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; The first state includes: the second switch, the third switch, the fourth switch, the sixth switch, and the eighth switch are all turned on; the second state includes: the first switch, the fourth switch, the sixth switch, the seventh switch, and the ninth switch are all turned on; the third state includes: the first switch, the fifth switch, the seventh switch, and the ninth switch are all turned on; The first mode includes the first state, and the second mode and the third mode both include: the first state, the second state, and the third state.

18. The wireless power receiving circuit according to claim 15, wherein: The processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor and a second capacitor; The control end of the first switch is connected to the controller, the first end of the first switch is connected to the second end of the second switch and the first end of the first capacitor respectively, and the second end of the first switch is connected to the second end of the fourth switch and the first end of the second capacitor respectively; The control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is further connected to the first end of the first capacitor; The control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the first end of the fourth switch, the second end of the fifth switch, and the battery, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; The control end of the fourth switch is connected to the controller, the first end of the fourth switch is also connected to the battery, and the second end of the fourth switch is also connected to the first end of the second capacitor; The control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the second end of the sixth switch and the second end of the second capacitor respectively, and the second end of the fifth switch is also connected to the battery; The control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground end, and the second end of the sixth switch is also connected to the second end of the second capacitor.

19. The wireless power receiving circuit according to claim 18, wherein: The controller is further configured to: control the processing unit to switch between a first state, a second state, and a third state in response to the positive half-cycle signal; and control the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; The first state includes: the second switch, the third switch, the fourth switch, and the sixth switch are all turned on; the second state includes: the first switch, the fourth switch, and the sixth switch are all turned on; the third state includes: the first switch and the fifth switch are all turned on; The first mode includes the first state, and the second mode and the third mode both include: the first state, the second state, and the third state.

20. The wireless power receiving circuit according to claim 15, wherein: The processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor and a second capacitor; The control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the first end of the fourth switch, the second end of the fifth switch, and the battery; The control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is further connected to the first end of the first capacitor; The control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; The control end of the fourth switch is connected to the controller, the first end of the fourth switch is also connected to the battery, and the second end of the fourth switch is also connected to the first end of the second capacitor; The control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the second end of the sixth switch and the second end of the second capacitor respectively, and the second end of the fifth switch is also connected to the battery; The control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground end, and the second end of the sixth switch is also connected to the second end of the second capacitor.

21. The wireless power receiving circuit according to claim 20, wherein: The controller is further configured to: control the processing unit to switch between a first state, a second state, and a third state in response to the positive half-cycle signal; and control the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; The first state includes: the second switch, the fourth switch, and the sixth switch are all turned on; the second state includes: the second switch, the third switch, and the fifth switch are all turned on; the third state includes: the first switch, the fourth switch, and the sixth switch are all turned on; The first mode includes the first state, and the second mode and the third mode both include the second state and the third state.

22. A wireless charging system, characterized in that: include: A charging device and at least one power receiving device, wherein the power receiving device comprises: a battery, and a wireless power receiving circuit according to any one of claims 1 to 21; The charging device is used to: provide electromagnetic waves to the wireless power receiving circuit; The wireless power receiving circuit is used to charge the battery using the electromagnetic waves.

23. An electronic device, characterized in that: include: The wireless power receiving circuit and battery according to any one of claims 1 to 21, wherein the wireless power receiving circuit is connected to the battery.

24. A charging method, characterized in that: The charging method includes: The power receiver outputs an AC signal to a midpoint of the first bridge arm, a midpoint of the second bridge arm, the first switch unit, and the second switch unit in response to the wireless transmission of electric energy; The controller controls the first bridge arm and the second bridge arm to output the first partial signal to the first processing unit in response to a first partial signal in a positive half-cycle signal of the AC signal, and controls the second bridge arm and the first switch unit to output the second partial signal to the first processing unit in response to a second partial signal in the positive half-cycle signal, so that the first processing unit charges the battery according to the first partial signal and the second partial signal. The controller controls, in response to a third portion of the negative half-cycle signal of the AC signal, the first bridge arm and the second bridge arm to output a first positive signal corresponding to the third portion of the signal to the second processing unit, and controls, in response to a fourth portion of the negative half-cycle signal, the first bridge arm and the second switch unit to output a second positive signal corresponding to the fourth portion of the signal to the second processing unit, so that the second processing unit charges the battery according to the first positive signal and the second positive signal. In which, the first bridge arm is also respectively connected to the first input end, the ground end, and the controller of the first processing unit, and the second bridge arm is also respectively connected to the first input end, the ground end, and the controller of the second processing unit; the first switch unit is also connected to the second input end of the first processing unit, and the first input end of the first processing unit is different from the second input end of the first processing unit; the second switch unit is also connected to the second input end of the second processing unit, and the first input end of the second processing unit is different from the second input end of the second processing unit; under the action of the first part of the signal, the multiple capacitors in the first processing unit, the power receiver, and the battery present a first connection relationship, and under the action of the second part of the signal, the multiple capacitors in the first processing unit, the power receiver, and the battery present a second connection relationship, and the first connection relationship is different from the second connection relationship; under the action of the first positive signal, the multiple capacitors in the second processing unit, the power receiver, and the battery present a third connection relationship, and under the action of the second positive signal, the multiple capacitors in the second processing unit, the power receiver, and the battery present a fourth connection relationship, and the third connection relationship is different from the fourth connection relationship.

25. The charging method according to claim 24, wherein: In response to a first portion of the signal in the positive half-cycle signal, controlling the first bridge arm and the second bridge arm to output the first portion of the signal to the first processing unit includes: in response to the first portion of the signal, controlling the first bridge arm and the second bridge arm to switch between a first mode and a second mode; In response to a third portion of the negative half-cycle signal, controlling the first bridge arm and the second bridge arm to output a first positive signal corresponding to the third portion of the signal to the second processing unit includes: in response to the first positive signal, controlling the first bridge arm and the second bridge arm to switch between the first mode and the third mode; Wherein, the first bridge arm includes: a first bridge arm switch and a second bridge arm switch, the control electrode of the first bridge arm switch is connected to the controller, the first electrode of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second electrode of the second bridge arm switch, and the second electrode of the first bridge arm switch is connected to the first input end of the first processing unit; the control electrode of the second bridge arm switch is connected to the controller, the first electrode of the second bridge arm switch is connected to the ground end, and the second electrode of the second bridge arm switch is also connected to the positive electrode of the power receiver; the second bridge arm includes: a third bridge arm switch and a fourth bridge arm switch, the control electrode of the third bridge arm switch is connected to the controller, and the third The first pole of the bridge arm switch is respectively connected to the negative pole of the power receiver and the second pole of the fourth bridge arm switch, and the second pole of the third bridge arm switch is connected to the first input end of the second processing unit; the control pole of the fourth bridge arm switch is connected to the controller, the first pole of the fourth bridge arm switch is connected to the ground end, and the second pole of the fourth bridge arm switch is also connected to the negative pole of the power receiver; the first mode includes: a mode in which the second bridge arm switch and the fourth bridge arm switch are both turned on, the second mode includes: a mode in which the first bridge arm switch and the fourth bridge arm switch are both turned on, and the third mode includes: a mode in which the second bridge arm switch and the third bridge arm switch are both turned on.

26. The charging method according to claim 25, wherein: In response to a second portion of the signal in the positive half-cycle signal, controlling the second bridge arm and the first switch unit to output the second portion of the signal to the first processing unit includes: in response to the second portion of the signal, controlling the second bridge arm and the first switch unit to be in a fourth mode; In response to a fourth portion of the negative half-cycle signal, controlling the first bridge arm and the second switch unit to output a second positive signal corresponding to the fourth portion of the signal to the second processing unit includes: in response to the second positive signal, controlling the first bridge arm and the second switch unit to be in a fifth mode; The first switch unit includes a first switch, a control electrode of the first switch is connected to the controller, a first electrode of the first switch is connected to the second input end of the first processing unit, and a second electrode of the first switch is connected to the positive electrode of the power receiver; the second switch unit includes a second switch, a control electrode of the second switch is connected to the controller, a first electrode of the second switch is connected to the second input end of the second processing unit, and a second electrode of the second switch is connected to the negative electrode of the power receiver; the fourth mode includes: a mode in which the fourth bridge arm switch and the first switch are both turned on, and the fifth mode includes: a mode in which the second bridge arm switch and the second switch are both turned on; the fourth mode exists between the first mode and the second mode, and the fifth mode exists between the first mode and the third mode.

27. The charging method according to claim 26, wherein: Charging the battery according to the first partial signal and the second partial signal includes: the controller controlling the first processing unit to switch between a first state, a second state, and a third state in response to the first partial signal and the second partial signal; Wherein, the first processing unit includes: a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a first capacitor, a second capacitor and a third capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the fourth switch, the first end of the first capacitor and the first switch unit, and the second end of the third switch is respectively connected to the second end of the sixth switch and the first end of the second capacitor; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is connected to the ground end, and the second end of the fourth switch is also respectively connected to the first end of the first capacitor, the first switch The switch unit is connected; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the ninth switch and the first end of the third capacitor, and the second end of the fifth switch is respectively connected to the second end of the first capacitor and the first bridge arm; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is respectively connected to the second end of the seventh switch, the battery, the first end of the ninth switch, and the second end of the tenth switch, and the second end of the sixth switch is also connected to the first end of the second capacitor; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is respectively connected to the second end of the eighth switch and the second end of the second capacitor, The second end of the seventh switch is also connected to the battery; the control end of the eighth switch is connected to the controller, the first end of the eighth switch is connected to the ground end, and the second end of the eighth switch is also connected to the second end of the second capacitor; the control end of the ninth switch is connected to the controller, the first end of the ninth switch is also connected to the battery, and the second end of the ninth switch is also connected to the first end of the third capacitor; the control end of the tenth switch is connected to the controller, the first end of the tenth switch is respectively connected to the second end of the third capacitor and the second end of the eleventh switch, and the second end of the tenth switch is also connected to the battery; the control end of the eleventh switch is connected to the controller, and the eleventh switch is connected to the battery. A first end of the switch is connected to the ground end, and a second end of the eleventh switch is further connected to the second end of the third capacitor. The first state includes a state in which the fourth switch, the fifth switch, the sixth switch, the eighth switch, and the tenth switch are all turned on. The second state includes a state in which the third switch, the sixth switch, the eighth switch, the ninth switch, and the eleventh switch are all turned on. The third state includes a state in which the third switch, the seventh switch, the ninth switch, and the eleventh switch are all turned on. The first mode includes the first state, the fourth mode includes the second state, and the second mode includes the first state, the second state, and the third state.

28. The charging method according to claim 26 or 27, wherein: Charging the battery according to the first positive signal and the second positive signal includes: the controller controlling the second processing unit to switch between a fourth state, a fifth state, and a sixth state in response to the first positive signal and the second positive signal; The second processing unit includes: a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a nineteenth switch, a twentieth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; a control end of the twelfth switch is connected to the controller, a first end of the twelfth switch is respectively connected to the second end of the thirteenth switch, the first end of the fourth capacitor, and the second switch unit, and a second end of the twelfth switch is respectively connected to the second end of the fifteenth switch and the first end of the fifth capacitor; a control end of the thirteenth switch is connected to the controller, a first end of the thirteenth switch is connected to the ground end, and a second end of the thirteenth switch is further connected to the ground end. The first end of the fourth capacitor and the second bridge arm are connected to the first end of the fourth capacitor and the second switch unit respectively; the control end of the fourteenth switch is connected to the controller, the first end of the fourteenth switch is connected to the second end of the eighteenth switch and the first end of the sixth capacitor respectively, and the second end of the fourteenth switch is connected to the second end of the fourth capacitor and the second bridge arm respectively; the control end of the fifteenth switch is connected to the controller, the first end of the fifteenth switch is connected to the second end of the sixteenth switch, the battery, the first end of the eighteenth switch, and the second end of the nineteenth switch respectively, and the second end of the fifteenth switch is also connected to the first end of the fifth capacitor; the control end of the sixteenth switch is connected to the controller, and the sixteenth switch The first end of the switch is respectively connected to the second end of the seventeenth switch and the second end of the fifth capacitor, and the second end of the sixteenth switch is also connected to the battery; the control end of the seventeenth switch is connected to the controller, the first end of the seventeenth switch is connected to the ground terminal, and the second end of the seventeenth switch is also connected to the second end of the fifth capacitor; the control end of the eighteenth switch is connected to the controller, the first end of the eighteenth switch is also connected to the battery, and the second end of the eighteenth switch is also connected to the first end of the sixth capacitor; the control end of the nineteenth switch is connected to the controller, the first end of the nineteenth switch is respectively connected to the second end of the sixth capacitor and the second end of the twentieth switch. , the second end of the nineteenth switch is further connected to the battery; the control end of the twentieth switch is connected to the controller, the first end of the twentieth switch is connected to the ground end, and the second end of the twentieth switch is further connected to the second end of the sixth capacitor; the fourth state includes: a state in which the thirteenth switch, the fourteenth switch, the fifteenth switch, the seventeenth switch, and the nineteenth switch are all turned on; the fifth state includes: a state in which the twelfth switch, the fifteenth switch, the seventeenth switch, the eighteenth switch, and the twentieth switch are all turned on; the sixth state includes: a state in which the twelfth switch, the sixteenth switch, the eighteenth switch, and the twentieth switch are all turned on;The first mode includes the fourth state, the fifth mode includes the fifth state, and the third mode includes: the fourth state, the fifth state, and the sixth state.

29. The charging method according to claim 26, wherein: Charging the battery according to the first partial signal and the second partial signal includes: the controller controlling the first processing unit to switch between a first state, a second state, and a third state in response to the positive half-cycle signal; Wherein, the first processing unit includes: a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a first capacitor, and a second capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the fourth switch, the first end of the first capacitor, and the first switch unit, and the second end of the third switch is respectively connected to the first end of the sixth switch, the second end of the seventh switch, and the battery; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is connected to the ground end, and the second end of the fourth switch is also respectively connected to the first end of the first capacitor and the first switch unit; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the first end of the second capacitor, and the second end of the fifth switch is respectively connected to the second end of the first capacitor and the first bridge arm; the control end of the sixth switch is connected to the controller, The first end of the sixth switch is further connected to the battery, and the second end of the sixth switch is further connected to the first end of the second capacitor; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is respectively connected to the second end of the eighth switch and the second end of the second capacitor, and the second end of the seventh switch is further connected to the battery; the control end of the eighth switch is connected to the controller, the first end of the eighth switch is connected to the ground terminal, and the second end of the eighth switch is further connected to the second end of the second capacitor; the first state includes: a state in which the fourth switch, the sixth switch, and the eighth switch are all turned on; the second state includes: a state in which the fourth switch, the fifth switch, and the seventh switch are all turned on; the third state includes: a state in which the third switch, the sixth switch, and the eighth switch are all turned on; the first mode includes the first state, the fourth mode includes the first state, and the second mode includes the second state and the third state.

30. The charging method according to claim 26 or 29, wherein: Charging the battery according to the first positive signal and the second positive signal includes: the controller controlling the second processing unit to switch between a fourth state, a fifth state, and a sixth state in response to the first positive signal and the second positive signal; Wherein, the second processing unit includes: a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a third capacitor and a fourth capacitor; the control end of the ninth switch is connected to the controller, the first end of the ninth switch is respectively connected to the second end of the tenth switch, the first end of the third capacitor and the second switch unit, and the second end of the ninth switch is respectively connected to the first end of the twelfth switch, the second end of the thirteenth switch and the battery; the control end of the tenth switch is connected to the controller, the first end of the tenth switch is connected to the ground end, and the second end of the tenth switch is also respectively connected to the first end of the third capacitor and the second switch unit; the control end of the eleventh switch is connected to the controller, the first end of the eleventh switch is respectively connected to the second end of the twelfth switch and the first end of the fourth capacitor, and the second end of the eleventh switch is respectively connected to the second end of the third capacitor and the second bridge arm; the control end of the twelfth switch is connected to the controller, The first end of the twelfth switch is further connected to the battery, and the second end of the twelfth switch is further connected to the first end of the fourth capacitor. The control end of the thirteenth switch is connected to the controller, the first end of the thirteenth switch is respectively connected to the second end of the fourteenth switch and the second end of the fourth capacitor, and the second end of the thirteenth switch is further connected to the battery. The control end of the fourteenth switch is connected to the controller, the first end of the fourteenth switch is connected to the ground terminal, and the second end of the fourteenth switch is further connected to the second end of the fourth capacitor. The fourth state includes a state in which the tenth switch, the twelfth switch, and the fourteenth switch are all turned on. The fifth state includes a state in which the tenth switch, the eleventh switch, and the thirteenth switch are all turned on. The sixth state includes a state in which the ninth switch, the twelfth switch, and the fourteenth switch are all turned on. The first mode includes the fourth state, the fifth mode includes the fourth state, and the third mode includes the fifth state and the sixth state.

31. A charging method, characterized in that: include: The power receiver outputs an AC signal to a midpoint of the first bridge arm and a midpoint of the second bridge arm in response to the wireless transmission of electric energy; In response to the AC signal, the controller controls the first bridge arm and the second bridge arm to sequentially output a positive signal corresponding to a positive half-cycle signal in the AC signal and a positive signal corresponding to a negative half-cycle signal in the AC signal to the processing unit, so that the processing unit sequentially charges the battery according to the positive half-cycle signal and the positive signal; Wherein, the first bridge arm and the second bridge arm are both connected to the same input end of the processing unit.

32. The charging method according to claim 31, wherein: In response to the AC signal, controlling the first bridge arm and the second bridge arm to sequentially output a positive signal corresponding to a positive half-cycle signal in the AC signal and a positive signal corresponding to a negative half-cycle signal in the AC signal to the processing unit, comprising: controlling the first bridge arm and the second bridge arm to switch between a first mode and a second mode in response to the positive half-cycle signal; and controlling the first bridge arm and the second bridge arm to switch between the first mode and a third mode in response to the positive signal; Wherein, the first bridge arm includes: a first bridge arm switch and a second bridge arm switch, the control electrode of the first bridge arm switch is connected to the controller, the first electrode of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second electrode of the second bridge arm switch, and the second electrode of the first bridge arm switch is connected to the processing unit; the control electrode of the second bridge arm switch is connected to the controller, the first electrode of the second bridge arm switch is connected to the ground end, and the second electrode of the second bridge arm switch is also connected to the positive electrode of the power receiver; the second bridge arm includes: a third bridge arm switch and a fourth bridge arm switch, the control electrode of the third bridge arm switch is connected to the controller, and the third The first pole of the bridge arm switch is respectively connected to the negative pole of the power receiver and the second pole of the fourth bridge arm switch, and the second pole of the third bridge arm switch is connected to the processing unit; the control pole of the fourth bridge arm switch is connected to the controller, the first pole of the fourth bridge arm switch is connected to the ground end, and the second pole of the fourth bridge arm switch is also connected to the negative pole of the power receiver; the first mode includes: a mode in which the second bridge arm switch and the fourth bridge arm switch are both turned on, the second mode includes: a mode in which the first bridge arm switch and the fourth bridge arm switch are both turned on, and the third mode includes: a mode in which the second bridge arm switch and the third bridge arm switch are both turned on.

33. The charging method according to claim 32, wherein: Charging the battery according to the positive half-cycle signal and the positive signal, comprising: the controller controlling the processing unit to switch between a first state, a second state, and a third state in response to the positive half-cycle signal; and controlling the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; The processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a first capacitor, a second capacitor, and a third capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is also connected to the first end of the first capacitor; The first end of the third switch is connected to the second end of the seventh switch and the first end of the third capacitor, and the second end of the third switch is connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is connected to the second end of the fifth switch, the battery, the first end of the seventh switch, and the second end of the eighth switch, and the second end of the fourth switch is also connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the second end of the sixth switch and the second end of the second capacitor, and the The second end of the fifth switch is also connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground end, and the second end of the sixth switch is also connected to the second end of the second capacitor; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is also connected to the battery, and the second end of the seventh switch is also connected to the first end of the third capacitor; the control end of the eighth switch is connected to the controller, the first end of the eighth switch is respectively connected to the second end of the third capacitor and the second end of the ninth switch, and the second end of the eighth switch is also connected to the battery; the control end of the ninth switch is connected to the controller, The first end of the ninth switch is connected to the ground end, and the second end of the ninth switch is further connected to the second end of the third capacitor; the first state includes: a state in which the second switch, the third switch, the fourth switch, the sixth switch, and the eighth switch are all turned on; the second state includes: a state in which the first switch, the fourth switch, the sixth switch, the seventh switch, and the ninth switch are all turned on; the third state includes: a state in which the first switch, the fifth switch, the seventh switch, and the ninth switch are all turned on; the first mode includes the first state, and the second mode and the third mode both include: the first state, the second state, and the third state.

34. The charging method according to claim 32, wherein: Charging the battery according to the positive half-cycle signal and the positive signal, comprising: the controller controlling the processing unit to switch between a first state, a second state, and a third state in response to the positive half-cycle signal; and controlling the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; Wherein, the processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor and a second capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the first end of the fourth switch, the second end of the fifth switch, and the battery, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; the control end of the fourth switch is connected to the controller, and the The first end of the fourth switch is also connected to the battery, and the second end of the fourth switch is also connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the second end of the second capacitor, and the second end of the fifth switch is also connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground terminal, and the second end of the sixth switch is also connected to the second end of the second capacitor; the first state includes: the second switch, the third switch, the fourth switch, and the sixth switch are all turned on; the second state includes: the first switch, the fourth switch, and the sixth switch are all turned on; the third state includes: the first switch and the fifth switch are both turned on; the first mode includes the first state, and the second mode and the third mode both include: the first state, the second state, and the third state.

35. The charging method according to claim 32, wherein: Charging the battery according to the positive half-cycle signal and the positive signal, comprising: the controller controlling the processing unit to switch between a first state, a second state, and a third state in response to the positive half-cycle signal; and controlling the processing unit to switch between the first state, the second state, and the third state in response to the positive signal; Wherein, the processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a first capacitor and a second capacitor; the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the second end of the second switch and the first end of the first capacitor, and the second end of the first switch is respectively connected to the first end of the fourth switch, the second end of the fifth switch, and the battery; the control end of the second switch is connected to the controller, the first end of the second switch is connected to the ground end, and the second end of the second switch is also connected to the first end of the first capacitor; the control end of the third switch is connected to the controller, the first end of the third switch is respectively connected to the second end of the fourth switch and the first end of the second capacitor, and the second end of the third switch is respectively connected to the second end of the first capacitor, the first bridge arm, and the second bridge arm; the control end of the fourth switch is connected to the controller, and the fourth The first end of the switch is further connected to the battery, and the second end of the fourth switch is further connected to the first end of the second capacitor; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is respectively connected to the second end of the sixth switch and the second end of the second capacitor, and the second end of the fifth switch is further connected to the battery; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is connected to the ground terminal, and the second end of the sixth switch is further connected to the second end of the second capacitor; the first state includes: a state in which the second switch, the fourth switch, and the sixth switch are all turned on; the second state includes: a state in which the second switch, the third switch, and the fifth switch are all turned on; the third state includes: a state in which the first switch, the fourth switch, and the sixth switch are all turned on; the first mode includes the first state, and the second mode and the third mode both include the second state and the third state.

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