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

Abstract

The present application provides a wireless power receiving circuit, a wireless charging system, an electronic device, and a charging method. A first bridge arm and a second bridge arm are provided and a connection relationship between the two bridge arms and a DCDC converter is configured, so that the two bridge arms and the DCDC converter are not in a cascaded relationship, and the two bridge arms and the DCDC converter are used in cooperation when an alternating current signal is processed, and are not independent of each other but affect each other. Therefore, the wireless power receiving circuit comprising the two bridge arms and the DCDC converter belongs to a single-stage circuit solution, loss generated when a battery is charged is single-stage loss, and compared with multi-stage loss in a multi-stage cascaded circuit solution, the energy loss during charging can be effectively reduced, improving the 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 the People's Republic of China on January 19, 2024, with application number 202410081027.1 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.

[0005] Summary of the Invention

[0006] The present application provides a wireless power receiving circuit, a wireless charging system, an electronic device, and a charging method for improving charging efficiency.

[0007] In a first aspect, the 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 DCDC (Direct Current Direct Current, DC / DC) converter and controller; the DCDC converter includes a first processing unit and a second processing unit; a 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: output an AC signal to the midpoints of the first bridge arm and the second bridge arm in response to wireless transmission of electric energy; the first bridge arm is also respectively connected to the first processing unit, the ground end, and the controller, and the second bridge arm is also respectively connected to the second processing unit, the ground end, and the controller, and the controller is used to: in response to the positive half-cycle signal of the AC signal, control the first bridge arm and the second bridge arm to output the positive half-cycle signal to the first processing unit; in response to the negative half-cycle signal of the AC signal, control the first bridge arm and the second bridge arm to output a positive signal corresponding to the negative half-cycle signal to the second processing unit; the output end of the first processing unit is used to be connected to the battery, and the first processing unit is used to: charge the battery in response to the positive half-cycle signal; the output end of the second processing unit is used to be connected to the battery, and the second processing unit is used to: charge the battery in response to the positive signal.

[0008] In this way, 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 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. Therefore, through the coordinated operation of the first processing unit, the second processing unit and the two bridge arms, the battery can be charged based on the AC signal, so that the whole formed by the DCDC converter and the two bridge arms can play the role of AC-DC conversion. In addition, 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 belongs to 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.

[0009] Optionally, the DCDC converter may further include a first switching unit and a second switching unit. The DCDC converter also includes a wired power input terminal. The first switching unit is respectively connected to the first processing unit, the wired power input terminal, and the controller, and the second switching unit is respectively connected to 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 first switching unit to disconnect the wired power input terminal from the first processing unit, and control the second switching unit to disconnect the wired power input terminal from the second processing unit. The first bridge arm is further connected to the first switching unit, and the second bridge arm is further connected to the second switching unit. In this way, the first switching unit and the second switching unit can control whether the power input from the wired power input terminal is transmitted to the first processing unit and the second processing unit. Furthermore, when wirelessly charging the battery, the first switching unit and the second switching unit can be controlled to be disconnected to prevent the power input from the wired power input terminal from interfering with the wireless charging process, thereby improving the reliability and safety of wireless charging.

[0010] 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 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 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 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, the switching of the first bridge arm and the second bridge arm between different modes can be controlled by the conduction state of each bridge arm switch, thereby transmitting the positive half-cycle signal and the positive signal corresponding to the negative half-cycle signal in the AC signal to the first processing unit and the second processing unit, respectively, so that the first processing unit and the second processing unit can process the received signals and charge the battery, thereby achieving coordinated operation of each bridge arm and each processing unit, and improving battery charging efficiency.

[0011] Optionally, the configuration of the first processing unit and the second processing unit may include the following situations:

[0012] Case 1: The first 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 and the first 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 seventh The first end of the 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.

[0013] 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 second switch, the third switch, the fourth switch, the sixth switch, and the eighth switch are all turned on, and the other switches in the first processing unit are all turned off; 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, and the other switches in the first processing unit are all turned off; 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, and the other switches in the first processing unit are all turned off; the first mode includes the first 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.

[0014] The second processing unit may include: a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a fourth capacitor, a fifth capacitor and a sixth capacitor; wherein 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 eleventh switch and the first end of the fourth capacitor, and the second end of the tenth switch is respectively connected to the second end of the thirteenth switch and the first end of the fifth capacitor; 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 first end of the fourth 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 sixteenth switch and the first end of the sixth capacitor, and the second end of the twelfth switch is respectively connected to the second end of the fourth capacitor and the second bridge arm; 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, the battery, the first end of the The first end of the sixteenth switch is connected to the second end of the seventeenth switch, and the second end of the thirteenth switch is also connected to the first end of the fifth capacitor; 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 fifteenth switch and the second end of the fifth capacitor, and the second end of the fourteenth switch is also connected to the battery; the control end of the fifteenth switch is connected to the controller, the first end of the fifteenth switch is connected to the ground terminal, and the second end of the fifteenth switch is also connected to the second end of the fifth capacitor; the control end of the sixteenth switch is connected to the controller, the first end of the sixteenth switch is also connected to the battery, and the second end of the sixteenth switch is also connected to the first end of the sixth capacitor; the control end of the seventeenth switch is connected to the controller, the first end of the seventeenth switch is respectively connected to the second end of the sixth capacitor and the second end of the eighteenth switch, and the second end of the seventeenth switch is also connected to the battery; the control end of the eighteenth switch is connected to the controller, the first end of the eighteenth switch is connected to the ground terminal, and the second end of the eighteenth switch is also connected to the second end of the sixth capacitor. In other words, the structure of the second processing unit is substantially similar to that of the first processing unit, which can simplify the structural complexity of the DCDC converter, reduce the difficulty of manufacturing the wireless power receiving circuit, and reduce the manufacturing cost.

[0015] At this time, the controller is further configured to, in response to the 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 eleventh switch, the twelfth switch, the thirteenth switch, the fifteenth switch, and the seventeenth switch are all turned on, and the other switches in the second processing unit are all turned off; the fifth state includes a state in which the tenth switch, the thirteenth switch, the fifteenth switch, the sixteenth switch, and the eighteenth switch are all turned on, and the other switches in the second processing unit are all turned off; and the sixth state includes a state in which the tenth switch, the fourteenth switch, the sixteenth switch, and the eighteenth switch are all turned on, and the other switches in the second processing unit are all turned off. The first mode includes the fourth 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 positive signal.

[0016] Case 2: The first processing unit may include: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, a first capacitor, a second capacitor, and a third capacitor; wherein 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 third capacitor, and the second end of the first switch is respectively connected to the first bridge arm and the first end of the first capacitor; the control end of the second switch is connected to the controller, the first end of the second switch is respectively connected to the first end of the second capacitor and the second end of the third switch, and the second end of the second switch is also connected to the first end of the 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 second end of the sixth switch, and the battery, and the third switch the second end of the switch is also connected to 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 respectively connected to the second end of the fifth switch, the second end of the first capacitor, and the second end of the second capacitor, and the second end of the fourth switch is also connected to the battery; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the ground terminal, and the second end of the fifth switch is also connected to the second end of the first capacitor and the second end of the second capacitor, respectively; 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 and the second end of the third capacitor, and the second end of the sixth switch is also connected to the battery; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is connected to the ground terminal, and the second end of the seventh switch is also connected to the second end of the third capacitor.

[0017] At this time, the controller is further configured to control the first processing unit to switch between a first state and a second state in response to the positive half-cycle signal. The first state includes a state in which the first, third, fifth, and sixth switches are all on and the other switches in the first processing unit are all off. The second state includes a state in which the second, fourth, and seventh switches are all on and the other switches in the first processing unit are all off. The first mode includes the first state, and the second mode includes the first state and the second 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.

[0018] The second processing unit may include: an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; wherein 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 ninth switch and the first end of the sixth capacitor, and the second end of the eighth switch is respectively connected to the second bridge arm and the first end of the 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 first end of the fifth capacitor and the second end of the tenth switch, and the second end of the ninth switch is also connected to the first end of the sixth 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 eleventh switch, the second end of the thirteenth switch, and the battery, and the second end of the tenth switch is also connected to the a first end of the fifth capacitor is connected; a control end of an eleventh switch is connected to the controller, a first end of the eleventh switch is respectively connected to the second end of the twelfth switch, the second end of the fourth capacitor, and the second end of the fifth capacitor, and the second end of the eleventh switch is further connected to the battery; a control end of the twelfth switch is connected to the controller, a first end of the twelfth switch is connected to the ground terminal, and a second end of the twelfth switch is further respectively connected to the second end of the fourth capacitor and the second 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 respectively connected to the second end of the fourteenth switch and the second end of the sixth capacitor, and the second end of the thirteenth switch is further connected to the battery; a control end of the fourteenth switch is connected to the controller, a first end of the fourteenth switch is connected to the ground terminal, and a second end of the fourteenth switch is further connected to the second end of the sixth capacitor.

[0019] At this time, the controller is further configured to, in response to the positive signal, control the second processing unit to switch between a third state and a fourth state. The third state includes a state in which the eighth, tenth, twelfth, and thirteenth switches are all on and the other switches in the second processing unit are all off. The fourth state includes a state in which the ninth, eleventh, and fourteenth switches are all on and the other switches in the second processing unit are all off. The first mode includes the third state, and the third mode includes the third and fourth states. In this manner, by switching the second processing unit between different states, the battery can be charged based on the positive signal.

[0020] Case 3: The first processing unit may include: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, a first capacitor, a second capacitor, and a third capacitor; wherein 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 respectively connected to the first end of the first capacitor and the second end of the 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 first end of the fourth switch, the second end of the fifth switch, and the first end of the third capacitor The first end of the third switch is connected to the second end of the first capacitor and the first 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 first end of the third capacitor, 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 battery, and the second end of the fifth switch is also connected to the first end of the third capacitor; 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 and the second end of the third capacitor, and the second end of the sixth switch is also connected to the battery; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is also connected to the ground terminal, and the second end of the seventh switch is also connected to the second end of the third capacitor.

[0021] At this time, the controller is further configured to control the first processing unit to switch between a first state and a second state in response to the positive half-cycle signal. The first state includes a state in which the second, third, fourth, and sixth switches are all on and the other switches in the first processing unit are all off. The second state includes a state in which the first, fifth, and seventh switches are all on and the other switches in the first processing unit are all off. The first mode includes the first state, and the second mode includes the first state and the second 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.

[0022] The second processing unit may include: an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; wherein 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 ninth switch and the first end of the fourth capacitor, and the second end of the eighth switch is respectively connected to the second end of the eleventh switch and the first end of the fifth capacitor; 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 respectively connected to the first end of the fourth capacitor and the second end of the fifth 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 first end of the eleventh switch, the second end of the twelfth switch, and the first end of the sixth capacitor, and the tenth switch The second end of the switch is respectively connected to the second end of the fourth capacitor and the second bridge arm; the control end of the eleventh switch is connected to the controller, the first end of the eleventh switch is also connected to the first end of the sixth capacitor, and the second end of the eleventh switch is also connected to the first end of the fifth 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 and the battery, and the second end of the twelfth switch is also connected to the first end of the sixth 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 sixth 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 also connected to the ground terminal, and the second end of the fourteenth switch is also connected to the second end of the sixth capacitor.

[0023] At this time, the controller is further configured to, in response to the positive signal, control the second processing unit to switch between a third state and a fourth state. The third state includes a state in which the ninth, tenth, eleventh, and thirteenth switches are all on and the other switches in the second processing unit are all off. The fourth state includes a state in which the eighth, twelfth, and fourteenth switches are all on and the other switches in the second processing unit are all off. The first mode includes the third state, and the third mode includes the third and fourth states. In this manner, by switching the second processing unit between different states, the battery can be charged based on the positive signal.

[0024] Case 4: The first processing unit may include: 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; wherein the control end of the first switch is connected to the controller, the first end of the first switch is respectively connected to the first end of the first capacitor and the first bridge arm, and the second end of the first switch is respectively connected to the second end of the fourth switch, the second end of the seventh switch, the second end of the ninth 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 respectively connected to the second end of the first capacitor and the second end of the third switch; 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 and the first end of the second capacitor, and the second end of the third switch is also connected to the second end of the first capacitor; the control end of the fourth switch is connected to the controller, and the first end of the fourth switch is also connected to the ground end. The first end of the second capacitor is connected, and the second end of the fourth switch is also connected to the battery; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the ground terminal, and the second end of the fifth switch is respectively connected to the second end of the second capacitor and the second end of the sixth switch; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is respectively connected to the first end of the third capacitor and the first end of the seventh switch, 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 first end of the third 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 respectively connected to the second end of the third capacitor and the first end of the ninth switch; the control end of the ninth switch is connected to the controller, the first end of the ninth switch is also connected to the second end of the third capacitor, and the second end of the ninth switch is also connected to the battery.

[0025] 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, a third state, and a fourth state; wherein the first state includes: a state in which the first, second, fourth, fifth, seventh, and eighth switches are all on, and the other switches in the first processing unit are all off; the second state includes: a state in which the third, fourth, fifth, seventh, and eighth switches are all on, and the other switches in the first processing unit are all off; the third state includes: a state in which the third, sixth, seventh, and eighth switches are all on, and the other switches in the first processing unit are all off; and the fourth state includes: a state in which the third, sixth, and ninth switches are all on, and the other switches in the first processing unit are all off. The first mode includes the first state, and the second mode includes the first, second, third, and fourth states. In this way, by switching the first processing unit between different states, the battery can be charged based on the positive half-cycle signal.

[0026] The second processing unit may include: a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; wherein the control end of the tenth switch is connected to the controller, the first end of the tenth switch is respectively connected to the first end of the fourth capacitor and the second bridge arm, and the second end of the tenth switch is respectively connected to the second end of the thirteenth switch, the second end of the sixteenth switch, the second end of the eighteenth switch, and 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 respectively connected to the second end of the fourth capacitor and the second end of the twelfth switch; the control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is respectively connected to the first end of the thirteenth switch and the first end of the fifth capacitor, and the second end of the twelfth switch is also connected to the second 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 also connected to the The first end of the fifth capacitor is connected, 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 respectively connected to the second end of the fifth capacitor and the second end of the fifteenth switch; 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 sixth capacitor and the first end of the sixteenth switch, and the second end of the fifteenth switch is also connected to the second end of the fifth capacitor; the control end of the sixteenth switch is connected to the controller, the first end of the sixteenth switch is also connected to the first end of the sixth 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 respectively connected to the second end of the sixth capacitor and the first end of the eighteenth switch; the control end of the eighteenth switch is connected to the controller, the first end of the eighteenth switch is also connected to the second end of the sixth capacitor, and the second end of the eighteenth switch is also connected to the battery.

[0027] At this time, the controller is further configured to, in response to the positive signal, control the second processing unit to switch between a fifth state, a sixth state, a seventh state, and an eighth state. The fifth state includes a state in which the tenth, eleventh, thirteenth, fourteenth, sixteenth, and seventeenth switches are all on and all other switches in the second processing unit are off. The sixth state includes a state in which the twelfth, thirteenth, fourteenth, sixteenth, and seventeenth switches are all on and all other switches in the second processing unit are off. The seventh state includes a state in which the twelfth, fifteenth, sixteenth, and seventeenth switches are all on and all other switches in the second processing unit are off. The eighth state includes a state in which the twelfth, fifteenth, and eighteenth switches are all on and all other switches in the second processing unit are off. The first mode includes the fifth state, and the third mode includes the fifth, sixth, seventh, and eighth states. In this manner, by switching the second processing unit between different states, the battery can be charged based on the positive signal.

[0028] Case 5: The first processing unit may include: 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; wherein 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 and the first 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 end, and the second end of the sixth switch is also connected to the second end of the second capacitor.

[0029] At this time, the controller is further configured to control 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. The first state includes a state in which the second, third, fourth, and sixth switches are all on and all other switches in the first processing unit are off. The second state includes a state in which the first, fourth, and sixth switches are all on and all other switches in the first processing unit are off. The third state includes a state in which the first and fifth switches are all on and all other switches in the first processing unit are off. The first mode includes the first state, and the second mode includes the first, second, and third states. In this manner, by switching the first processing unit between different states, the battery can be charged based on the positive half-cycle signal.

[0030] The second processing unit may include: a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a third capacitor, and a fourth capacitor; wherein 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 first end of the third capacitor, and the second end of the seventh switch is respectively connected to the second end of the tenth switch and the first end of the fourth capacitor; 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 first end of the third 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 ground end, and the second end of the eighth switch is also connected to the first end of the third capacitor; The first end of the first switch, the second end of the eleventh switch, and the battery are connected, and the second end of the ninth switch is respectively connected to the second end of the third capacitor and the second bridge arm; the control end of the tenth switch is connected to the controller, the first end of the tenth switch is also connected to the battery, and the second end of the tenth switch is also connected to the first end of the fourth capacitor; 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 second end of the fourth capacitor, and the second end of the eleventh switch is also connected to the battery; the control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is connected to the ground terminal, and the second end of the twelfth switch is also connected to the second end of the fourth capacitor.

[0031] At this time, the controller is further configured to, in response to the positive signal, control the second processing unit to switch between a fourth state, a fifth state, and a sixth state. The fourth state includes the state in which the eighth, ninth, tenth, and twelfth switches are all on and the other switches in the second processing unit are all off. The fifth state includes the state in which the seventh, tenth, and twelfth switches are all on and the other switches in the second processing unit are all off. The sixth state includes the state in which the seventh and eleventh switches are all on and the other switches in the second processing unit are all off. The first mode includes the fourth 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 positive signal.

[0032] 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.

[0033] In a second 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; 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 in response to the electromagnetic waves, thereby improving the efficiency of the wireless charging system in charging the battery.

[0034] 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.

[0035] In a third 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 first aspect and any embodiment of the first aspect above, wherein the wireless power receiving circuit is connected to the battery to improve the charging efficiency of the electronic device.

[0036] 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.

[0037] In a fourth 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 outputs an AC signal to the midpoint of each bridge arm of a plurality of bridge arms in response to wireless transmission of electric energy; the controller controls the plurality of bridge arms to output the positive half-cycle signal to the first processing unit in response to the positive half-cycle signal of the AC signal, so that the first processing unit charges the battery according to the positive half-cycle signal; the controller controls the plurality of bridge arms to output the positive signal corresponding to the negative half-cycle signal to the second processing unit in response to the negative half-cycle signal of the AC signal, so that the second processing unit charges the battery according to the positive signal. In this way, the first processing unit can charge the battery based on the positive half-cycle signal under the action of multiple bridge arms, 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 multiple bridge arms. Therefore, through the coordinated operation of the first processing unit, the second processing unit and the multiple bridge arms, the battery can be charged based on the AC signal, so that the whole composed of the DCDC converter and the multiple bridge arms can play the role of AC-DC conversion. In addition, the DCDC converter and the multiple 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 belongs to 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.

[0038] Optionally, in response to the positive half-cycle signal of the AC signal, the multiple bridge arms are controlled to output the positive half-cycle signal to the first processing unit, including: in response to the positive half-cycle signal, the multiple bridge arms are controlled to switch between the first mode and the second mode; in response to the negative half-cycle signal of the AC signal, the multiple bridge arms are controlled to output the positive signal corresponding to the negative half-cycle signal to the second processing unit, including: in response to the positive signal, the multiple bridge arms are controlled to switch between the first mode and the third mode; wherein the multiple bridge arms include a first bridge arm and a second bridge arm, the first bridge arm includes: a first bridge arm switch and a second bridge arm switch, the control end of the first bridge arm switch is connected to the controller, the first end of the first bridge arm switch is respectively connected to the positive pole of the power receiver and the second end of the second bridge arm switch, the second end of the first bridge arm switch is connected to the first processing unit; the control end of the second bridge arm switch is connected to the The first end of the second bridge arm switch is connected to the controller, the first end of the second bridge arm switch is connected to the ground end, and the second end 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 end of the third bridge arm switch is connected to the controller, the first end of the third bridge arm switch is respectively connected to the negative pole of the power receiver and the second end of the fourth bridge arm switch, and the second end of the third bridge arm switch is connected to the second processing unit; the control end of the fourth bridge arm switch is connected to the controller, the first end of the fourth bridge arm switch is connected to the ground end, and the second end 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. In this way, the switching of multiple bridge arms between different modes can be controlled by the conduction state of each bridge arm switch, 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 process the received signals and charge the battery, thereby realizing the coordinated work of each bridge arm and each processing unit and improving the charging efficiency of the battery.

[0039] Optionally, charging the battery according to the positive half-cycle signal 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 positive half-cycle signal; wherein the first 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 and the first 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, and the second end of the fourth switch is also connected to the first end of the second capacitor; The control ends of the switches are connected to the controller, the first ends of the fifth switch are connected to the second ends of the sixth switch and the second ends of the second capacitor, respectively, and the second ends of the fifth switch are 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 control end of the seventh switch is connected to the controller, the first end of the seventh switch is further connected to the battery, and the second end of the seventh switch is further 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 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 terminal, 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 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.

[0040] Optionally, charging the battery according to the 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 positive signal; wherein the second processing unit includes: a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; a control end of the tenth switch is connected to the controller, a first end of the tenth switch is respectively connected to the second end of the eleventh switch and the first end of the fourth capacitor, and a second end of the tenth switch is respectively connected to the second end of the thirteenth switch and the first end of the fifth capacitor; The control end of the 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 first end of the fourth 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 sixteenth switch and the first end of the sixth capacitor, and the second end of the twelfth switch is respectively connected to the second end of the fourth capacitor and the second bridge arm; 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, the battery, the first end of the sixteenth switch, and the second end of the seventeenth switch, and the second end of the thirteenth switch is also connected to the first end of the fifth capacitor; the control end of the fourteenth switch is connected to the controller, the first end of the thirteenth switch is respectively connected to the second end of the fourteenth switch, the battery, the first end of the sixteenth switch, and the second end of the seventeenth switch, and the second end of the thirteenth switch is also connected to the first end of the fifth capacitor; The control end of the first switch is connected to the controller, the first end of the fourth switch is respectively connected to the second end of the fifteenth switch and the second end of the fifth capacitor, and the second end of the fourteenth switch is also connected to the battery; the control end of the fifteenth switch is connected to the controller, the first end of the fifteenth switch is connected to the ground terminal, and the second end of the fifteenth switch is also connected to the second end of the fifth capacitor; the control end of the sixteenth switch is connected to the controller, the first end of the sixteenth switch is also connected to the battery, and the second end of the sixteenth switch is also connected to the first end of the sixth capacitor; the control end of the seventeenth switch is connected to the controller, the first end of the seventeenth switch is respectively connected to the second end of the sixth capacitor and the second end of the eighteenth switch, and the seventeenth switch is connected to the ground terminal. The second end of the switch is also connected to the battery; the control end of the eighteenth switch is connected to the controller, the first end of the eighteenth switch is connected to the ground end, and the second end of the eighteenth switch is also connected to the second end of the sixth capacitor; the fourth state includes: a state in which the eleventh switch, the twelfth switch, the thirteenth switch, the fifteenth switch, and the seventeenth switch are all on; the fifth state includes: a state in which the tenth switch, the thirteenth switch, the fifteenth switch, the sixteenth switch, and the eighteenth switch are all on; the sixth state includes: a state in which the tenth switch, the fourteenth switch, the sixteenth switch, and the eighteenth switch are all on; the first mode includes the fourth 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 positive signal.

[0041] Optionally, charging the battery according to the positive half-cycle signal includes: the controller controls the first processing unit to switch between the first state and the second state in response to the positive half-cycle signal; wherein the first processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh 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 third capacitor, and the second end of the first switch is respectively connected to the first bridge arm and the first end of the first capacitor; the control end of the second switch is connected to the controller, the first end of the second switch is respectively connected to the first end of the second capacitor and the second end of the third switch, and the second end of the second switch is also connected to the first end of the 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 second end of the sixth switch and the battery, and the second end of the third switch is also connected to the first end of the second capacitor; The control end of the 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 second end of the first capacitor, and the second end of the second capacitor, and the second end of the fourth switch is also connected to the battery; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the ground terminal, and the second end of the fifth switch is also respectively connected to the second end of the first capacitor and the second end of the second capacitor; 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 and the second end of the third capacitor, and the second end of the sixth switch is also connected to the battery; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is connected to the ground terminal, and the second end of the seventh switch is also connected to the second end of the third capacitor; the first state includes: a state in which the first switch, the third switch, the fifth switch, and the sixth switch are all on; the second state includes: a state in which the second switch, the fourth switch, and the seventh switch are all on; the first mode includes the first state, and the second mode includes the first state and the second 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.

[0042] Optionally, charging the battery according to the positive signal includes: the controller controls the second processing unit to switch between the third state and the fourth state in response to the positive signal; wherein the second processing unit includes: an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fourth capacitor, a fifth capacitor and a sixth 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 ninth switch and the first end of the sixth capacitor, and the second end of the eighth switch is respectively connected to the second bridge arm and the first end of the 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 first end of the fifth capacitor and the second end of the tenth switch, and the second end of the ninth switch is also connected to the first end of the sixth 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 eleventh switch, the second end of the thirteenth switch and the battery, and the second end of the tenth switch is also connected to the first end of the fifth capacitor; the control end of the eleventh switch is connected to The controller is connected, the first end of the eleventh switch is respectively connected to the second end of the twelfth switch, the second end of the fourth capacitor, and the second end of the fifth capacitor, and the second end of the eleventh switch is also connected to the battery; the control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is connected to the ground terminal, and the second end of the twelfth switch is also respectively connected to the second end of the fourth capacitor and the second 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 respectively connected to the second end of the fourteenth switch and the second end of the sixth 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 sixth capacitor; the third state includes: a state in which the eighth switch, the tenth switch, the twelfth switch, and the thirteenth switch are all turned on; the fourth state includes: a state in which the ninth switch, the eleventh switch, and the fourteenth switch are all turned on; the first mode includes the third state, and the third mode includes the third state and the fourth state. In this way, by switching between different states by the second processing unit, the battery can be charged based on the positive signal.

[0043] Optionally, charging the battery according to the positive half-cycle signal includes: the controller controls the first processing unit to switch between the first state and the second state in response to the positive half-cycle signal; wherein the first processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh 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 terminal, and the second end of the second switch is also respectively connected to the first end of the first capacitor and the second end of the 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 first end of the fourth switch, the second end of the fifth 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 and second bridge arms are connected; the control end of the fourth switch is connected to the controller, the first end of the fourth switch is also connected to the first end of the third capacitor, 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 battery, and the second end of the fifth switch is also connected to the first end of the third capacitor; 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 and the second end of the third capacitor, and the second end of the sixth switch is also connected to the battery; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is also connected to the ground terminal, and the second end of the seventh 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, and the sixth switch are all turned on; the second state includes: the first switch, the fifth switch, and the seventh switch are all turned on; the first mode includes the first state, and the second mode includes the first state and the second state. In this way, by switching between different states of the first processing unit, the battery can be charged based on the positive half-cycle signal.

[0044] Optionally, charging the battery according to the positive signal includes: the controller controls the second processing unit to switch between the third state and the fourth state in response to the positive signal; wherein the second processing unit includes: an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fourth capacitor, a fifth capacitor and a sixth 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 ninth switch and the first end of the fourth capacitor, and the second end of the eighth switch is respectively connected to the second end of the eleventh switch and the first end of the fifth capacitor; 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 respectively connected to the first end of the fourth capacitor and the second end of the fifth 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 first end of the eleventh switch, the second end of the twelfth switch and the first end of the sixth capacitor, and the second end of the tenth switch is respectively connected to the second end of the fourth capacitor and the second bridge arm. The control terminal of the eleventh switch is connected to the controller, the first terminal of the eleventh switch is also connected to the first terminal of the sixth capacitor, and the second terminal of the eleventh switch is also connected to the first terminal of the fifth capacitor; the control terminal of the twelfth switch is connected to the controller, the first terminal of the twelfth switch is respectively connected to the second terminal of the thirteenth switch and the battery, and the second terminal of the twelfth switch is also connected to the first terminal of the sixth capacitor; the control terminal of the thirteenth switch is connected to the controller, the first terminal of the thirteenth switch is respectively connected to the second terminal of the fourteenth switch and the second terminal of the sixth capacitor, and the second terminal of the thirteenth switch is also connected to the battery; the control terminal of the fourteenth switch is connected to the controller, the first terminal of the fourteenth switch is also connected to the ground terminal, and the second terminal of the fourteenth switch is also connected to the second terminal of the sixth capacitor; the third state includes: a state in which the ninth switch, the tenth switch, the eleventh switch, and the thirteenth switch are all turned on; the fourth state includes: a state in which the eighth switch, the twelfth switch, and the fourteenth switch are all turned on; the first mode includes the third state, and the third mode includes the third state and the fourth state. In this way, by switching between different states by the second processing unit, the battery can be charged based on the positive signal.

[0045] Optionally, charging the battery according to the positive half-cycle signal includes: the controller controls the first processing unit to switch between the first state, the second state, the third state, and the fourth state in response to the positive half-cycle signal; wherein the first 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 first end of the first capacitor and the first bridge arm, and the second end of the first switch is respectively connected to the second end of the fourth switch, the second end of the seventh switch, the second end of the ninth switch, a battery; a control end of the second switch is connected to the controller, a first end of the second switch is connected to the ground end, and a second end of the second switch is respectively connected to the second end of the first capacitor and the second end of the third switch; a control end of the third switch is connected to the controller, a first end of the third switch is respectively connected to the first end of the fourth switch and the first end of the second capacitor, and the second end of the third switch is also connected to the second end of the first capacitor; a control end of the fourth switch is connected to the controller, a first end of the fourth switch is also connected to the first end of the second capacitor, and the second end of the fourth switch is also connected to the battery; a control end of the fifth switch is connected to the controller, a first end of the fifth switch is connected to the ground end, and a second end of the fifth switch is respectively connected to the second end of the second capacitor and the second end of the sixth switch; a control end of the sixth switch is connected to the controller, a first end of the sixth switch is respectively connected to the first end of the third capacitor and the first end of the seventh switch, and the second end of the sixth switch is also connected to the second 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 also connected to the first end of the third capacitor, and the second end of the seventh switch is also connected to the battery; a control end of the eighth switch is connected to the controller, a first end of the eighth switch is connected to the ground end, and a second end of the eighth switch is respectively connected to the second end of the third capacitor and the first end of the ninth switch; a control end of the ninth switch is connected to the controller The first end of the ninth switch is further connected to the second end of the third capacitor, and the second end of the ninth switch is further connected to the battery. The first state includes: the first switch, the second switch, the fourth switch, the fifth switch, the seventh switch, and the eighth switch are all on. The second state includes: the third switch, the fourth switch, the fifth switch, the seventh switch, and the eighth switch are all on. The third state includes: the third switch, the sixth switch, the seventh switch, and the eighth switch are all on. The fourth state includes: the third switch, the sixth switch, and the ninth switch are all on. The first mode includes the first state, and the second mode includes the first state, the second state, the third state, and the fourth state. In this way, by switching between different states of the first processing unit, the battery can be charged based on the positive half-cycle signal.

[0046] Optionally, charging the battery according to the positive signal includes: the controller controlling the second processing unit to switch between the fifth state, the sixth state, the seventh state, and the eighth state in response to the positive signal; wherein the second processing unit includes: a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; a control end of the tenth switch is connected to the controller, a first end of the tenth switch is respectively connected to the first end of the fourth capacitor and the second bridge arm, and a second end of the tenth switch is respectively connected to the second end of the thirteenth switch, the second end of the sixteenth switch, the second end of the eighteenth switch, and the battery; a control end of the eleventh switch is connected to the controller, a first end of the eleventh switch is connected to the ground terminal, and a second end of the eleventh switch is respectively connected to the second end of the fourth capacitor and the second end of the twelfth switch; a control end of the twelfth switch is connected to the controller, a first end of the twelfth switch is respectively connected to the first end of the thirteenth switch and the first end of the fifth capacitor, and the second end of the twelfth switch is also connected to the second end of the fourth capacitor; a control end of the thirteenth switch is connected to the controller, and a first end of the thirteenth switch is also connected to the first end of the fifth capacitor. 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 end, and the second end of the fourteenth switch is respectively connected to the second end of the fifth capacitor and the second end of the fifteenth switch; 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 sixth capacitor and the first end of the sixteenth switch, and the second end of the fifteenth switch is also connected to the second end of the fifth capacitor; the control end of the sixteenth switch is connected to the controller, the first end of the sixteenth switch is also connected to the first end of the sixth 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 end, and the second end of the seventeenth switch is respectively connected to the second end of the sixth capacitor and the first end of the tenth switch. The first end of the eighth switch is connected; the control end of the eighteenth switch is connected to the controller, the first end of the eighteenth switch is also connected to the second end of the sixth capacitor, and the second end of the eighteenth switch is also connected to the battery; the fifth state includes: a state in which the tenth switch, the eleventh switch, the thirteenth switch, the fourteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the sixth state includes: a state in which the twelfth switch, the thirteenth switch, the fourteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the seventh state includes: a state in which the twelfth switch, the fifteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the eighth state includes: a state in which the twelfth switch, the fifteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the first mode includes the fifth state, and the third mode includes the fifth state, the sixth state, the seventh state, and the eighth state. In this way, by switching between different states by the second processing unit, the battery can be charged based on the positive signal.

[0047] Optionally, charging the battery according to the positive half-cycle signal 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 positive half-cycle signal; wherein the first 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 The first and second bridge arms are connected to the second end of the first capacitor and the first 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 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 includes the first state, the second state, and the third state. In this way, by switching between different states of the first processing unit, the battery can be charged based on the positive half-cycle signal.

[0048] Optionally, charging the battery according to the 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 positive signal; wherein the second processing unit includes: a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a third capacitor, and a fourth 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 first end of the third capacitor, and the second end of the seventh switch is respectively connected to the second end of the tenth switch and the first end of the fourth capacitor; 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 first end of the third 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 first end of the tenth switch, the second end of the eleventh switch, and the battery, and the second end of the ninth switch is respectively connected to the third capacitor. The control end of the tenth switch is connected to the controller, the first end of the tenth switch is also connected to the battery, and the second end of the tenth switch is also connected to the first end of the fourth capacitor; 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 second end of the fourth capacitor, and the second end of the eleventh switch is also connected to the battery; the control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is connected to the ground terminal, and the second end of the twelfth switch is also connected to the second end of the fourth capacitor; the fourth state includes: the state in which the eighth switch, the ninth switch, the tenth switch, and the twelfth switch are all turned on; the fifth state includes: the state in which the seventh switch, the tenth switch, and the twelfth switch are all turned on; the sixth state includes: the state in which the seventh switch and the eleventh switch are all turned on; the first mode includes the fourth 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 positive signal.

[0049] 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

[0050] FIG1 is a schematic diagram of an application scenario of a wireless charging system provided in an embodiment of the present application;

[0051] FIG2 is a schematic structural diagram of a wireless charging system provided in an embodiment of the present application;

[0052] FIG3 is a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application;

[0053] FIG4 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0054] FIG5 is a schematic diagram showing the working principle of the structure shown in FIG4 ;

[0055] FIG6 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0056] FIG7 is a schematic diagram showing the working principle of the structure shown in FIG6 ;

[0057] FIG8 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0058] FIG9 is a schematic diagram showing the working principle of the structure shown in FIG8 ;

[0059] FIG10 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0060] FIG11 is a schematic diagram showing the working principle of the structure shown in FIG10 ;

[0061] FIG12 is a schematic structural diagram of another wireless power receiving circuit provided in an embodiment of the present application;

[0062] FIG13 is a schematic diagram showing the working principle of the structure shown in FIG12 ;

[0063] FIG14 is a schematic structural diagram of yet another wireless power receiving circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0064] 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.

[0065] 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.

[0066] In order to facilitate understanding of the technical solution provided by the embodiments of the present application, its application scenario is first explained below.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] In order to solve the above problems, an embodiment of the present application provides a wireless charging solution. By setting two bridge arms and setting the connection relationship between the two bridge arms and the DCDC converter, the two bridge arms and the DCDC converter are not in a cascade relationship. The two are used in conjunction when processing the AC signal, and the two are not independent of each other but affect each other. Therefore, the wireless power receiving circuit including the two bridge arms and the DCDC converter belongs to a single-stage circuit solution. The loss generated 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.

[0071] 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.

[0072] Figure 3 exemplarily shows a structural schematic diagram of a wireless power receiving circuit provided in an embodiment of the present application. As shown in Figure 3 , the wireless power receiving circuit may include: a power receiver, a first bridge arm, a second bridge arm, a DCDC 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 (i.e., node P1) and the bridge arm midpoint of the second bridge arm (i.e., node P2), and the power receiver is used to output an AC signal to the bridge arm midpoints of the first bridge arm and the second bridge arm in response to wireless transmission of electric energy, that is, in response to electric energy wirelessly transmitted through the LC resonator; the first bridge arm is further respectively connected to the first processing unit, the ground terminal GND, and the controller, and the second bridge arm is further respectively connected to the second processing unit, the ground terminal GND, and the controller. The controller is not shown in Figure 3, so the connection relationship between each bridge arm and the controller is not shown in Figure 3. At this time, the controller is used to: respond to the positive half-cycle signal of the AC signal, control the two bridge arms to output the positive half-cycle signal to the first processing unit; respond to the negative half-cycle signal of the AC signal, control the two bridge arms to output the positive signal corresponding to the negative half-cycle signal to the second processing unit; the output end of the first processing unit is used to be connected to the battery, and the first processing unit is used to: charge the battery in response to the positive half-cycle signal; the output end of the second processing unit is used to be connected to the battery, and the second processing unit is used to: charge the battery in response to the positive signal.

[0073] That is to say, 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 in the AC signal to the first processing unit, so that the first processing unit charges the battery based on the positive half-cycle signal. The two bridge arms can also process the negative half-cycle signal in the AC signal to obtain a corresponding positive signal, and transmit the positive signal to the second processing unit, so that the second processing unit charges the battery based on the positive signal. 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 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. Therefore, through the coordinated operation of the first processing unit, the second processing unit and the two bridge arms, the battery can be charged based on the AC signal, so that the whole formed by the DCDC converter and the two bridge arms can play the role of AC-DC conversion, and 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 belongs to 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.

[0074] The positive electrode of the power receiver (i.e., the end indicated by + in Figure 3) 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 Figure 3) is connected to the midpoint of the second bridge arm (i.e., node P2), as shown in Figure 3; 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), (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.

[0075] 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 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 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.

[0076] As shown in FIG4 , the first processing unit may include: 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; wherein a control end of the first switch M1 is connected to a 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 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 respectively 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 respectively connected to the second end of the first capacitor C1 and the first bridge arm; a control end of the fourth switch M4 is connected to the controller, a first end of the fourth switch M4 is respectively connected to the first end of the fifth switch M5 The control terminal 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 second end of the second capacitor C2, and the second end 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 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. The control terminal of the seventh switch M7 is connected to the controller, the first end of the seventh switch M7 is also connected to the battery, and the second end of the seventh switch M7 is also connected to the first end of the third capacitor C3. The control terminal of the eighth switch M8 is connected to the controller, the first end of the eighth switch M8 is respectively connected to the second end of the third capacitor C3 and the second end of the ninth switch M9, and the second end 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 end of the ninth switch M9 is connected to the ground terminal GND, and the second end of the ninth switch M9 is also connected to the second end of the third capacitor C3.

[0077] 4 , the second processing unit may include: a tenth switch M10, an eleventh switch M11, 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 fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; wherein a control end of the tenth switch M10 is connected to the controller, a first end of the tenth switch M10 is respectively connected to the second end of the eleventh switch M11 and the first end of the fourth capacitor C4, a second end of the tenth switch M10 is respectively connected to the second end of the thirteenth switch M13, the fifth capacitor C5, and the sixth capacitor C6. The first end of the capacitor C5 is connected; 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 first end of the fourth capacitor C4; the control end of the twelfth switch M12 is connected to the controller, the first end of the twelfth switch M12 is respectively connected to the second end of the sixteenth switch M16 and the first end of the sixth capacitor C6, and the second end of the twelfth switch M12 is respectively connected to the second end of the fourth capacitor C4 and the second bridge arm; the control end of the thirteenth switch M13 is connected to the controller, the first end of the thirteenth switch M13 is respectively connected to the fourteenth switch M a first end of a sixth switch M16 connected to a second end of a seventh switch M17, a second end of a thirteenth switch M13 connected to a first end of a fifth capacitor C5; a control end of a fourteenth switch M14 connected to a controller, a first end of the fourteenth switch M14 connected to a second end of a fifteenth switch M15 and a second end of the fifth capacitor C5, respectively, and a second end of the fourteenth switch M14 connected to a battery; a control end of a fifteenth switch M15 connected to a controller, a first end of the fifteenth switch M15 connected to a ground terminal GND, and a second end of the fifteenth switch M15 connected to a second end of the fifth capacitor C5; The control end of the sixteenth switch M16 is connected to the controller, the first end of the sixteenth switch M16 is also connected to the battery, and the second end of the sixteenth switch M16 is also connected to the first end of the sixth capacitor C6. The control end of the seventeenth switch M17 is connected to the controller, the first end of the seventeenth switch M17 is respectively connected to the second end of the sixth capacitor C6 and the second end of the eighteenth switch M18, and the second end of the seventeenth switch M17 is also connected to the battery. The control end of the eighteenth switch M18 is connected to the controller, the first end of the eighteenth switch M18 is connected to the ground terminal GND, and the second end of the eighteenth switch M18 is also connected to the second end of the sixth capacitor C6. In other words, the structure of the second processing unit is substantially similar to that of the first processing unit, which simplifies the structural complexity of the DCDC converter, reduces the difficulty in manufacturing the wireless power receiving circuit, and reduces the manufacturing cost.

[0078] 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.

[0079] Based on the structure shown in FIG4 , the specific operation process of the wireless power receiving circuit may include:

[0080] For the positive half-cycle of an AC signal: the controller controls each switch so that the first processing unit sequentially operates in the first state, the second state, the third state, the second state, and the first state, thereby switching the first 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 second mode, and the first mode, 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.

[0081] 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 first processing unit are off. At this time, in conjunction with Mode 1 shown in Figure 5, 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 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 first 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.

[0082] 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 first processing unit are all off. At this time, combined with Mode 2 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 VAC =Vc1, Vc1=Vc2+Vc3 (i.e., relational formula 1), Vc2=Vb (i.e., relational formula 2).

[0083] 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 first processing unit are all off. At this time, combined with mode 3 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 (i.e., relation 3). Combining relation 1, relation 2, and relation 3, we can get V AC =3Vb.

[0084] 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 turned on, the second bridge arm switch Q2 and the third bridge arm switch Q3 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 first processing unit are all turned off. At this time, combined with mode 4 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., relational formula 4). Combining relational formulas 1, 2, 3, and 4, we can get V AC =4Vb.

[0085] 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 the AC signal; in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive half-cycle signal in the AC signal; and in mode 4, the charging voltage Vb provided to the battery is approximately 1 / 4 of the positive half-cycle signal in the AC signal.

[0086] As shown in FIG5 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms 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 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 first processing unit sequentially operates in Mode 1, Mode 2, Mode 3, and Mode 4; 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 first processing unit sequentially operates in Mode 4, Mode 3, Mode 2, and Mode 1. Furthermore, the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0087] For the negative half-cycle 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 switching the second processing unit 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 switching each bridge arm between the first mode and the third mode. The first mode includes the fourth state, and the third mode includes the fourth state, the fifth state, and the sixth state.

[0088] 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 eleventh switch M11, the twelfth switch M12, the thirteenth switch M13, the fifteenth switch M15, and the seventeenth switch M17 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 representing the battery have the connection relationship shown in mode 5 in Figure 5.

[0089] In the fourth state (i.e., mode 6) 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 eleventh switch M11, the twelfth switch M12, the thirteenth switch M13, the fifteenth switch M15, and the seventeenth switch M17 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 representing the battery have the connection relationship shown in mode 6 in Figure 5.

[0090] 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 tenth switch M10, the thirteenth switch M13, the fifteenth switch M15, the sixteenth switch M16, and the eighteenth switch M18 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 representing the battery have the connection relationship shown in mode 7 in Figure 5.

[0091] 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 tenth switch M10, the fourteenth switch M14, the sixteenth switch M16, and the eighteenth switch M18 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 representing the battery have the connection relationship shown in mode 8 in Figure 5.

[0092] 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 fifth capacitor C5; 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 the AC 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 the AC signal; and 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 in the AC signal.

[0093] Based on this, as shown in 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 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 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 and the second processing unit sequentially operates in Mode 8, Mode 7, Mode 6, and Mode 5. Furthermore, the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0094] 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.

[0095] As shown in FIG3 , 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 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, allowing the first 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 second processing unit. At this time, the signal transmitted to the second processing unit is also a non-negative signal, that is, a positive signal corresponding to the negative half-cycle signal, allowing the second processing unit to charge the battery based on the positive signal.

[0096] 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.

[0097] FIG6 exemplarily shows a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. Referring to FIG6 , the structure of the wireless power receiving circuit in this embodiment is substantially similar to that of the wireless power receiving circuit shown in FIG4 in the aforementioned embodiment, 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 may include: 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, a first capacitor C1, a second capacitor C2, and a third capacitor C3; wherein 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 third capacitor C3, and the second end of the first switch M1 is respectively connected to the first bridge arm and the first end of the first capacitor C1; the control end of the second switch M2 is connected to the controller, the first end of the second switch M2 is respectively connected to the first end of the second capacitor C2 and the second end of the third switch M3, and the second end of the second switch M2 is also connected to the first end of the third capacitor C3; 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 second end of the sixth switch M6, and the battery. The second end of the third switch M3 is also connected to the first end of the second capacitor C2; the control end of the fourth switch M4 is connected to the controller, the first end of the fourth switch M4 is respectively connected to the second end of the fifth switch M5, the second end of the first capacitor C1, and the second end of the second capacitor C2, and the second end of the fourth switch M4 is also connected to the battery; 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 ground terminal GND, and the second end of the fifth switch M5 is also respectively connected to the second end of the first capacitor C1 and the second end of the second capacitor C2; the control end of the sixth switch M6 is connected to the controller, the first end of the sixth switch M6 is respectively connected to the second end of the seventh switch M7 and the second end of the third capacitor C3, and the second end of the sixth switch M6 is also connected to the battery; the control end of the seventh switch M7 is connected to the controller, the first end of the seventh switch M7 is connected to the ground terminal GND, and the second end of the seventh switch M7 is also connected to the second end of the third capacitor C3.

[0098] The second processing unit may include: an eighth switch M8, 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 fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; wherein a control end of the eighth switch M8 is connected to the controller, a first end of the eighth switch M8 is respectively connected to the second end of the ninth switch M9 and the first end of the sixth capacitor C6, and a second end of the eighth switch M8 is respectively connected to the second bridge arm and the first end of the 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 first end of the fifth capacitor C5 and the second end of the tenth switch M10, and a second end of the ninth switch M9 is also connected to the first end of the sixth capacitor C6; a control end of the tenth switch M10 is connected to the controller, a first end of the tenth switch M10 is respectively connected to the second end of the eleventh switch M11, the second end of the thirteenth switch M13, and the battery, and a second end of the tenth switch M10 is The first terminal of the 11th switch M11 is connected to the controller, the first terminal of the 11th switch M11 is respectively connected to the second terminal of the 12th switch M12, the second terminal of the fourth capacitor C4, and the second terminal of the fifth capacitor C5, and the second terminal of the 11th switch M11 is also connected to the battery; the control terminal of the 12th switch M12 is connected to the controller, the first terminal of the 12th switch M12 is connected to the ground terminal GND, and the second terminal of the 12th switch M12 is also respectively connected to the second terminal of the fourth capacitor C4 and the second terminal of the fifth capacitor C5; the control terminal of the 13th switch M13 is connected to the controller, the first terminal of the 13th switch M13 is respectively connected to the second terminal of the 14th switch M14 and the second terminal of the sixth capacitor C6, and the second terminal of the 13th switch M13 is also connected to the battery; the control terminal of the 14th switch M14 is connected to the controller, the first terminal of the 14th switch M14 is connected to the ground terminal GND, and the second terminal of the 14th switch M14 is also connected to the second terminal of the sixth capacitor C6.

[0099] Based on the structure shown in FIG6 , the specific operation process of the wireless power receiving circuit may include:

[0100] For the positive half-cycle of an AC signal, the controller controls each switch so that the first processing unit sequentially operates in the first state, the second state, and the first state, thereby switching the first processing unit between the first state and the second state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms sequentially operate in the first mode, the second mode, and the first mode, 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 and the second state.

[0101] 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 first switch M1, the third switch M3, the fifth switch M5, and the sixth switch M6 are all on, and all other switches in the first processing unit are off. At this point, referring to Mode 1 shown in FIG7 , 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 the resistor R0, and the second capacitor C2 is connected in parallel with the resistor R0, so Vb = Vc2.

[0102] 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 first switch M1, the third switch M3, the fifth switch M5, and the sixth switch M6 are all on, and the other switches in the first processing unit are all off. At this time, combined with Mode 2 shown in Figure 7, the second capacitor C2 and the third capacitor C3 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, and the second capacitor C2 is connected in parallel with the resistor R0 used to represent the battery. Therefore, it can be obtained that: V AC =Vc1, Vc1=Vc2+Vc3 (i.e., Relationship 1).

[0103] 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 second switch M2, the fourth switch M4, and the seventh switch M7 are all on, and the other switches in the first processing unit are all off. At this time, in conjunction with mode 3 shown in Figure 7, the first capacitor C1 and the resistor R0 representing the battery are connected in series and then in parallel with the power receiver represented by AC, and the second capacitor C2 and the third capacitor C3 are connected in series and in parallel with the resistor R0 representing the battery, so V AC =Vc1+Vb (i.e., relation 2), Vc2+Vc3=Vb (i.e., relation 3). Further, after combining the above relation 1, relation 2, and relation 3, we can get V AC =2Vb.

[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 positive half-cycle signal in the AC signal; and in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive half-cycle signal in the AC signal.

[0105] As shown in FIG7 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms and the first processing unit sequentially operates in Mode 1, Mode 2, Mode 3, Mode 2, and Mode 1. Specifically, during the process of increasing from 0 to the maximum value of the signal in the positive half-cycle signal, the entire system consisting of the two bridge arms and the first processing unit sequentially operates in Mode 1 and Mode 2; 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 first processing unit sequentially operates in Mode 2 and Mode 1. Furthermore, 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 of the AC signal: the controller controls each switch so that the second processing unit operates in the third state, the fourth state, and the third state in sequence, thereby switching the second processing unit between the third state and the fourth 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 switching each bridge arm between the first mode and the third mode. The first mode includes the third state, and the third mode includes the third state and the fourth state.

[0107] In the third state (i.e., mode 4) 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 eighth switch M8, the tenth switch M10, the twelfth switch M12, 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 fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 representing the battery have the connection relationship shown in mode 4 in Figure 7.

[0108] In the third state (i.e., Mode 5) 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 eighth switch M8, the tenth switch M10, the twelfth switch M12, 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 fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 representing the battery have the connection relationship shown in Mode 5 in Figure 7.

[0109] In the fourth state (i.e., mode 6) 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 ninth switch M9, the eleventh switch M11, 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 fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 representing the battery have the connection relationship shown in mode 6 in Figure 7.

[0110] Similarly, for the second processing unit, based on the working process being similar to that of the first processing unit, in mode 4, the charging voltage Vb provided to the battery is approximately the voltage of the fifth capacitor C5; in mode 5, the charging voltage Vb provided to the battery is approximately the positive signal corresponding to the negative half-cycle signal in the AC signal; and 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 the AC signal.

[0111] Based on this, and in conjunction with FIG7 , 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 4, Mode 5, Mode 6, Mode 5, and Mode 4. Specifically, during the process of increasing the positive signal from 0 to its maximum value, the entire system consisting of the two bridge arms and the second processing unit sequentially operates in Mode 4, Mode 5, and Mode 6; during the process of decreasing the positive signal from its maximum value to 0, the entire system consisting of the two bridge arms and the second processing unit sequentially operates in Mode 6, Mode 5, and Mode 4. Furthermore, the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0112] 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. 4 in the aforementioned embodiment can be found in the relevant introduction in the aforementioned embodiment, and the repeated parts will not be repeated.

[0113] FIG8 exemplarily shows a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. Referring to FIG8 , the structure of the wireless power receiving circuit in this embodiment is substantially similar to that of the wireless power receiving circuit shown in FIG4 in the aforementioned embodiment, except that the structures of the first processing unit and the second processing unit are different. For example, as shown in FIG8 , the first processing unit may include: 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, a first capacitor C1, a second capacitor C2, and a third capacitor C3; wherein 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 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 respectively connected to the first end of the first capacitor C1 and the second end of the second capacitor C2; 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 first end of the fourth switch M4, the second end of the fifth switch M5, and the first end of the third switch M5. The first end of the third capacitor C3 is connected, and the second end of the third switch M3 is respectively connected to the second end of the first capacitor C1 and the first bridge arm; the 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 first end of the third capacitor C3, and the second end of the fourth switch M4 is also connected to the first end of the second capacitor C2; the 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 battery, and the second end of the fifth switch M5 is also connected to the first end of the third capacitor C3; the control end of the sixth switch M6 is connected to the controller, the first end of the sixth switch M6 is respectively connected to the second end of the seventh switch M7 and the second end of the third capacitor C3, and the second end of the sixth switch M6 is also connected to the battery; the control end of the seventh switch M7 is connected to the controller, the first end of the seventh switch M7 is also connected to the ground terminal GND, and the second end of the seventh switch M7 is also connected to the second end of the third capacitor C3.

[0114] The second processing unit may include: an eighth switch M8, 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 fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; wherein a control end of the eighth switch M8 is connected to the controller, a first end of the eighth switch M8 is respectively connected to the second end of the ninth switch M9 and the first end of the fourth capacitor C4, and a second end of the eighth switch M8 is respectively connected to the second end of the eleventh switch M11 and the first end of the fifth capacitor C5; a control end of the ninth switch M9 is connected to the controller, a first end of the ninth switch M9 is connected to the ground terminal GND, and a second end of the ninth switch M9 is further respectively connected to the first end of the fourth capacitor C4 and the second end of the fifth capacitor C5; a control end of the tenth switch M10 is connected to the controller, a first end of the tenth switch M10 is respectively connected to the first end of the eleventh switch M11, the second end of the twelfth switch M12, and the first end of the sixth capacitor C6. The second end of the tenth switch M10 is respectively connected to the second end of the fourth capacitor C4 and the second bridge arm; the control end of the eleventh switch M11 is connected to the controller, the first end of the eleventh switch M11 is also connected to the first end of the sixth capacitor C6, and the second end of the eleventh switch M11 is also connected to the first end of the fifth capacitor C5; the control end of the twelfth switch M12 is connected to the controller, the first end of the twelfth switch M12 is respectively connected to the second end of the thirteenth switch M13 and the battery, and the second end of the twelfth switch M12 is also connected to the first end of the sixth capacitor C6; the control end of the thirteenth switch M13 is connected to the controller, the first end of the thirteenth switch M13 is respectively connected to the second end of the fourteenth switch M14 and the second end of the sixth capacitor C6, and the second end of the thirteenth switch M13 is also connected to the battery; the control end of the fourteenth switch M14 is connected to the controller, the first end of the fourteenth switch M14 is also connected to the ground terminal GND, and the second end of the fourteenth switch M14 is also connected to the second end of the sixth capacitor C6.

[0115] Based on the structure shown in FIG8 , the specific operation process of the wireless power receiving circuit may include:

[0116] For the positive half-cycle of an AC signal, the controller controls each switch so that the first processing unit sequentially operates in the first state, the second state, and the first state, thereby switching the first processing unit between the first state and the second state. Furthermore, the controller controls each bridge arm switch so that the two bridge arms sequentially operate in the first mode, the second mode, and the first mode, 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 and the second state.

[0117] 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 first processing unit are off. At this point, referring to Mode 1 shown in FIG9 , 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 the resistor R0, and the third capacitor C3 is connected in series with the resistor R0 and then in parallel with the first capacitor C1. Therefore, Vb = Vc1 - Vc3.

[0118] 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 first processing unit are all off. At this time, combined with Mode 2 shown in Figure 9, the first capacitor C1 and the second capacitor C2 are connected in parallel and then connected in series with the third capacitor C3 and the resistor R0 representing the battery, and the first capacitor C1 is connected in parallel with the power receiver represented by AC. Therefore, it can be obtained that: V AC =Vc1=Vc2, Vc2=Vc3+Vb (i.e., Relationship 1).

[0119] 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 M1, 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 9, the first capacitor C1 and the second capacitor C2 are connected in series and in parallel with the power receiver represented by AC, so V AC =Vc1+Vc2 (i.e., Relationship 2). Since the third capacitor C3 is connected in parallel with the resistor R0 representing the battery, it can be concluded that Vc3=Vb (i.e., Relationship 3). Further, after combining the above Relationship 1, Relationship 2, and Relationship 3, it can be obtained that V AC =4Vb.

[0120] Therefore, in mode 1, the charging voltage Vb provided to the battery is approximately the voltage of the first capacitor C1 minus the voltage of the third capacitor C3; in mode 2, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive half-cycle signal in the AC signal; and in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 4 of the positive half-cycle signal in the AC signal.

[0121] As shown in FIG9 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms and the first processing unit sequentially operates in Mode 1, Mode 2, Mode 3, Mode 2, and Mode 1. Specifically, during the process of increasing from 0 to the maximum value of the positive half-cycle signal, the entire system consisting of the two bridge arms and the first processing unit sequentially operates in Mode 1 and Mode 2; during the process of decreasing from the maximum value of the positive half-cycle signal to 0, the entire system consisting of the two bridge arms and the first processing unit sequentially operates in Mode 2 and Mode 1. Furthermore, the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0122] For the negative half-cycle of the AC signal: the controller controls each switch so that the second processing unit operates in the third state, the fourth state, and the third state in sequence, thereby switching the second processing unit between the third state and the fourth 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 switching each bridge arm between the first mode and the third mode. The first mode includes the third state, and the third mode includes the third state and the fourth state.

[0123] In the third state (i.e., mode 4) 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 ninth switch M9, 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 fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 representing the battery have the connection relationship shown in mode 4 in Figure 9.

[0124] In the third state of the third mode (i.e., mode 5), 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 ninth switch M9, 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 fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 representing the battery have the connection relationship shown in mode 5 in Figure 9.

[0125] In the fourth state (i.e., mode 6) 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 eighth switch M8, 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 fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the resistor R0 representing the battery have the connection relationship shown in mode 6 in Figure 9.

[0126] Similarly, for the second processing unit, based on the working process being similar to that of the first processing unit, in mode 4, the charging voltage Vb provided to the battery is approximately the voltage of the fourth capacitor C4 minus the voltage of the sixth capacitor C6; 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 in the AC signal; and in mode 6, the charging voltage Vb provided to the battery is approximately 1 / 4 of the positive signal corresponding to the negative half-cycle signal in the AC signal.

[0127] Based on this, and in conjunction with FIG9 , 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 4, Mode 5, Mode 6, Mode 5, and Mode 4. Specifically, during the process of increasing the positive signal from 0 to its maximum value, the entire system consisting of the two bridge arms and the second processing unit sequentially operates in Mode 4, Mode 5, and Mode 6; during the process of decreasing the positive signal from its maximum value to 0, the entire system consisting of the two bridge arms and the second processing unit sequentially operates in Mode 6, Mode 5, and Mode 4. Furthermore, the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0128] 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. 4 in the aforementioned embodiment can be found in the relevant introduction in the aforementioned embodiment, and the repeated parts will not be repeated.

[0129] FIG10 exemplarily shows a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. Referring to FIG10 , the structure of the wireless power receiving circuit in this embodiment is substantially similar to that of the wireless power receiving circuit shown in FIG4 in the aforementioned embodiment, except that the structures of the first processing unit and the second processing unit are different. For example, as shown in FIG10 , the first processing unit may include: 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; wherein 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 first end of the first capacitor C1 and the first bridge arm, and a second end of the first switch M1 is respectively connected to the second end of the fourth switch M4, the second end of the seventh switch M7, the second end of the ninth switch M9, 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 respectively connected to the second end of the first capacitor C1 and the second end of the third switch M3; 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 first end of the fourth switch M4 and the first end of the second capacitor C2, and a second end of the third switch M3 is also connected to the second end of the first capacitor C1; a control end of the fourth switch M4 is connected to the controller, and the fourth switch M4 is connected to the controller. A first end of the switch M4 is also connected to the first end of the second capacitor C2, and a second end of the fourth switch M4 is also connected to the battery. A control end of the fifth switch M5 is connected to the controller, a first end of the fifth switch M5 is connected to the ground terminal GND, and a second end of the fifth switch M5 is respectively connected to the second end of the second capacitor C2 and the second end of the sixth switch M6. A control end of the sixth switch M6 is connected to the controller, a first end of the sixth switch M6 is respectively connected to the first end of the third capacitor C3 and the first end of the seventh switch M7, and a second end of the sixth switch M6 is also connected to the second end of the second capacitor C2. A control end of the seventh switch M7 is connected to the controller, a first end of the seventh switch M7 is also connected to the first end of the third capacitor C3, and a second end of the seventh switch M7 is also connected to the battery. A control end of the eighth switch M8 is connected to the controller, a first end of the eighth switch M8 is connected to the ground terminal GND, and a second end of the eighth switch M8 is respectively connected to the second end of the third capacitor C3 and the first end of the ninth switch M9. A control end of the ninth switch M9 is connected to the controller, a first end of the ninth switch M9 is also connected to the second end of the third capacitor C3, and a second end of the ninth switch M9 is also connected to the battery.

[0130] The second processing unit may include: a tenth switch M10, an eleventh switch M11, 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 fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; wherein 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 first end and the second bridge arm of the fourth capacitor C4, and the second end of the tenth switch M10 is respectively connected to the second end of the thirteenth switch M13, the second end of the sixteenth switch M16, the second end of the eighteenth switch M18, and the fourth capacitor C4. The second end of the switch M18 is 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 respectively connected to the second end of the fourth capacitor C4 and the second end of the twelfth switch M12; the control end of the twelfth switch M12 is connected to the controller, the first end of the twelfth switch M12 is respectively connected to the first end of the thirteenth switch M13 and the first end of the fifth capacitor C5, and the second end of the twelfth switch M12 is also connected to the second end of the fourth capacitor C4; the control end of the thirteenth switch M13 is connected to the controller, The first end of the switch M13 is also connected to the first end of the fifth capacitor C5, and the second end of the thirteenth switch M13 is also connected to the battery; the control end of the fourteenth switch M14 is connected to the controller, the first end of the fourteenth switch M14 is connected to the ground terminal GND, and the second end of the fourteenth switch M14 is respectively connected to the second end of the fifth capacitor C5 and the second end of the fifteenth switch M15; 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 first end of the sixth capacitor C6 and the first end of the sixteenth switch M16, and the second end of the fifteenth switch M15 is also connected to the second end of the fifth capacitor C5; A control end of the sixth switch M16 is connected to the controller, a first end of the sixteenth switch M16 is also connected to the first end of the sixth capacitor C6, and a second end of the sixteenth switch M16 is also connected to the battery; a control end of the seventeenth switch M17 is connected to the controller, a first end of the seventeenth switch M17 is connected to the ground terminal GND, and a second end of the seventeenth switch M17 is respectively connected to the second end of the sixth capacitor C6 and the first end of the eighteenth switch M18; a control end of the eighteenth switch M18 is connected to the controller, a first end of the eighteenth switch M18 is also connected to the second end of the sixth capacitor C6, and a second end of the eighteenth switch M18 is also connected to the battery.

[0131] Based on the structure shown in FIG10 , the specific operation process of the wireless power receiving circuit may include:

[0132] For the positive half-cycle of an 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 fourth state, the third state, the second state, and the first state in sequence, thereby switching the first processing unit between the first state, the second state, the third state, and the fourth 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, the third state, and the fourth state.

[0133] 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 first switch M1, the second switch M2, the fourth switch M4, the fifth switch M5, the seventh switch M7, 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 FIG11 , 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, the second capacitor C2, the third capacitor C3, and the resistor R0 representing the battery are connected in parallel, so Vb = Vc2 = Vc1 = Vc3.

[0134] 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 first switch M1, the second switch M2, the fourth switch M4, the fifth switch M5, the seventh switch M7, 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 2 shown in Figure 11, the first capacitor C1, the second capacitor C2, the third capacitor C3, the resistor R0 representing the battery, and the power receiver represented by AC are all connected in parallel, so it can be obtained that V AC =Vc1=Vc2=Vc3=Vb (i.e., Relationship 1).

[0135] 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 turned on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned off; the third switch M3, the fourth switch M4, the fifth switch M5, the seventh switch M7, 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 3 shown in Figure 11, the first capacitor C1 and the second capacitor C2 are connected in series and in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2, combined with the above relationship 1, we can get V AC =2Vb.

[0136] 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 turned on, the second bridge arm switch Q2 and the third bridge arm switch Q3 are both turned off; the third switch M3, the sixth switch M6, the seventh switch M7, 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 4 shown in Figure 11, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in series and in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2+Vc3, combined with the above relationship 1, we can get V AC =3Vb.

[0137] In the fourth 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 third switch M3, the sixth switch M6, and the ninth switch M9 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 11, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the resistor R0 representing the battery are connected in series and in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2+Vc3+Vb, combined with the above relationship 1, we can get V AC =4Vb.

[0138] Therefore, in mode 1, the charging voltage Vb provided to the battery is approximately the voltage of the first capacitor C1, the second capacitor C2, or the third capacitor C3; in mode 2, the charging voltage Vb provided to the battery is approximately the positive half-cycle signal in the AC signal; in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive half-cycle signal in the AC signal; in mode 4, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive half-cycle signal in the AC signal; and in mode 5, the charging voltage Vb provided to the battery is approximately 1 / 4 of the positive half-cycle signal in the AC signal.

[0139] As shown in FIG11 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms 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 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 first processing unit sequentially operates in Mode 1, Mode 2, Mode 3, Mode 4, and Mode 5; 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 first processing unit sequentially operates in Mode 5, Mode 4, Mode 3, Mode 2, and Mode 1. Furthermore, the timing of switching between modes can be designed according to actual needs and is not specifically limited here.

[0140] For the negative half-cycle of the AC signal: the controller controls each switch so that the second processing unit operates in the fifth state, the sixth state, the seventh state, the eighth state, the seventh state, the sixth state, and the fifth state in sequence, thereby switching the second processing unit between the fifth state, the sixth state, the seventh state, and the eighth 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 switching each bridge arm between the first mode and the third mode. The first mode includes the fifth state, and the third mode includes the fifth state, the sixth state, the seventh state, and the eighth state.

[0141] In the fifth 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 tenth switch M10, the eleventh switch M11, the thirteenth switch M13, the fourteenth switch M14, the sixteenth switch M16, and the seventeenth switch M17 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 representing the battery have the connection relationship shown in mode 6 in Figure 11.

[0142] 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 tenth switch M10, the eleventh switch M11, the thirteenth switch M13, the fourteenth switch M14, the sixteenth switch M16, and the seventeenth switch M17 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 representing the battery have the connection relationship shown in mode 7 in Figure 11.

[0143] 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 twelfth switch M12, the thirteenth switch M13, the fourteenth switch M14, the sixteenth switch M16, and the seventeenth switch M17 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 representing the battery have the connection relationship shown in mode 8 in Figure 11.

[0144] In the seventh 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 twelfth switch M12, the fifteenth switch M15, the sixteenth switch M16, and the seventeenth switch M17 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 11.

[0145] In the eighth 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 twelfth switch M12, the fifteenth switch M15, and the eighteenth switch M18 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 representing the battery have the connection relationship shown in mode 10 in Figure 11.

[0146] 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 fourth capacitor C4, the fifth capacitor C5, or the sixth capacitor C6; in mode 7, the charging voltage Vb provided to the battery is approximately the positive signal corresponding to the negative half-cycle signal in the AC signal; in mode 8, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive signal corresponding to the negative half-cycle signal in the AC signal; in mode 9, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive signal corresponding to the negative half-cycle signal in the AC signal; and in mode 10, the charging voltage Vb provided to the battery is approximately 1 / 4 of the positive signal corresponding to the negative half-cycle signal in the AC signal.

[0147] Based on this, and 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 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 the maximum value of the 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, and Mode 10; 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 second processing unit sequentially operates in Mode 10, Mode 9, Mode 8, Mode 7, and Mode 6. Furthermore, the timing of switching between modes can be designed according to actual needs and is not specifically limited here.

[0148] 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. 4 in the aforementioned embodiment can be found in the relevant introduction in the aforementioned embodiment, and the repeated parts will not be repeated.

[0149] 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 FIG4 in the aforementioned embodiment, except that the structures of the first processing unit and the second processing unit are different. For example, as shown in FIG12 , the first processing unit may include: 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; wherein 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 third switch M The first end of the fourth switch M3 is connected to the first end of the fourth switch M4, the second end of the fifth switch M5, and the battery, respectively. The second end of the third switch M3 is connected to the second end of the first capacitor C1 and the first bridge arm, respectively. The 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. The 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. 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.

[0150] The second processing unit may include: a seventh switch M7, an eighth switch M8, a ninth switch M9, a tenth switch M10, an eleventh switch M11, a twelfth switch M12, a third capacitor C3, and a fourth capacitor C4; wherein 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 first end of the third capacitor C3, and the second end of the seventh switch M7 is respectively connected to the second end of the tenth switch M10 and the first end of the fourth capacitor C4; 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 end GND, and the second end of the eighth switch M8 is also connected to the first end of the third capacitor C3; the control end of the ninth switch M9 is connected to the controller, the first end of the ninth switch M9 is respectively connected to the tenth switch M10 and the first end of the fourth capacitor C4 In the embodiment, a first terminal of the first switch M10 is connected to the first end of the second switch M10, a second end of the eleventh switch M11, and the battery, and a second end of the ninth switch M9 is respectively connected to the second end of the third capacitor C3 and the second bridge arm; a control end of the tenth switch M10 is connected to the controller, a first end of the tenth switch M10 is also connected to the battery, and a second end of the tenth switch M10 is also connected to the first end of the fourth capacitor C4; a control end of the eleventh switch M11 is connected to the controller, a first end of the eleventh switch M11 is respectively connected to the second end of the twelfth switch M12 and the second end of the fourth capacitor C4, and a second end of the eleventh switch M11 is also connected to the battery; a control end of the twelfth switch M12 is connected to the controller, a first end of the twelfth switch M12 is connected to the ground terminal GND, and a second end of the twelfth switch M12 is also connected to the second end of the fourth capacitor C4.

[0151] Based on the structure shown in FIG12 , the specific operation process of the wireless power receiving circuit may include:

[0152] For the positive half-cycle of an AC signal: the controller controls each switch so that the first processing unit sequentially operates in the first state, the second state, the third state, the second state, and the first state, thereby switching the first 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 second mode, and the first mode, 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.

[0153] 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 first processing unit are off. At this point, referring to Mode 1 shown in FIG13 , the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all disconnected from the power receiver represented by AC. The first capacitor C1, the second capacitor C2, and the resistor R0 representing the battery are connected in parallel, so Vb = Vc1 = Vc2.

[0154] 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 first 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 all connected in parallel, so it can be obtained that V AC =Vc1=Vc2=Vb (i.e., Relationship 1).

[0155] 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 first processing unit are all off. At this time, combined with mode 3 shown in Figure 13, the first capacitor C1 and the second capacitor C2 are connected in series and in parallel with the power receiver represented by AC, so it can be obtained that V AC =Vc1+Vc2, combined with the above relationship 1, we can get V AC =2Vb.

[0156] 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 first processing unit are all off. At this time, combined with mode 4 shown in Figure 13, the first capacitor C1, the second capacitor C2, and the resistor R0 representing the battery 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, combined with the above relationship 1, we can get V AC =3Vb.

[0157] Therefore, in mode 1, the charging voltage Vb provided to the battery is approximately the voltage of the first capacitor C1 or the second capacitor C2; in mode 2, the charging voltage Vb provided to the battery is approximately the positive half-cycle signal in the AC signal; in mode 3, the charging voltage Vb provided to the battery is approximately 1 / 2 of the positive half-cycle signal in the AC signal; and in mode 4, the charging voltage Vb provided to the battery is approximately 1 / 3 of the positive half-cycle signal in the AC signal.

[0158] As shown in FIG13 , in response to a positive half-cycle signal, the entire system consisting of the two bridge arms 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 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 first processing unit sequentially operates in Mode 1, Mode 2, Mode 3, and Mode 4; 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 first processing unit sequentially operates in Mode 4, Mode 3, Mode 2, and Mode 1. Furthermore, the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0159] For the negative half-cycle 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 switching the second processing unit 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 switching each bridge arm between the first mode and the third mode. The first mode includes the fourth state, and the third mode includes the fourth state, the fifth state, and the sixth state.

[0160] 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 eighth switch M8, the ninth switch M9, the tenth switch M10, and the twelfth switch M12 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 13.

[0161] In the fourth state (i.e., mode 6) 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 eighth switch M8, the ninth switch M9, the tenth switch M10, and the twelfth switch M12 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 13.

[0162] 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 seventh switch M7, the tenth switch M10, and the twelfth switch M12 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 13.

[0163] 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 seventh switch M7 and the eleventh switch M11 are both 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 13.

[0164] 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 third capacitor C3 or the fourth capacitor C4; in mode 6, the charging voltage Vb provided to the battery is approximately the positive signal corresponding to the negative half-cycle signal in the AC 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 the AC signal; and 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 in the AC signal.

[0165] Based on this, as shown in FIG13 , 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 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 and the second processing unit sequentially operates in Mode 8, Mode 7, Mode 6, and Mode 5. Furthermore, the timing of switching between modes can be designed based on actual needs and is not specifically limited here.

[0166] 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. 4 in the aforementioned embodiment can be found in the relevant introduction in the aforementioned embodiment, and the repeated parts will not be repeated.

[0167] FIG14 exemplarily illustrates a schematic structural diagram of a wireless power receiving circuit provided in an embodiment of the present application. Referring to FIG14 , the structure of the wireless power receiving circuit in this embodiment is substantially similar to that of the wireless power receiving circuit shown in FIG3 of the aforementioned embodiment, except that the DCDC converter further includes a first switch unit and a second switch unit. For example, referring to FIG14 , the DCDC converter may further include a first switch unit and a second switch unit. The DCDC converter also includes a wired power input terminal (i.e., node P0). The first switch unit is respectively connected to the first processing unit, the wired power input terminal, and the controller, and the second switch unit is respectively connected to the second processing unit, the wired power input terminal, and the controller. FIG14 does not show the controller, and therefore does not show the connection relationship between the switch units and the controller. In this case, the controller is further configured to: in response to an AC signal, control the first switch unit to disconnect the wired power input terminal from the first processing unit, and control the second switch unit to disconnect the wired power input terminal from the second processing unit. The first bridge arm is also connected to the first switch unit, and the second bridge arm is also connected to the second switch unit. That is, node P3 can be considered a node between the first switch unit and the first processing unit, and node P4 can be considered a node between the second switch unit and the second processing unit. Therefore, nodes P3 and P4 can be considered center taps of the DCDC converter, and node P0 can be considered the input of the DCDC converter. The first bridge arm and the second bridge arm are respectively connected to different center taps of the DCDC converter, thereby enabling the two bridge arms and the DCDC converter to work in coordination, reducing losses during charging and improving charging efficiency. Furthermore, the first and second switch units can control whether power input from the wired power input is transmitted to the first and second processing units. Consequently, when wirelessly charging the battery, both the first and second switch units can be controlled to be disconnected, preventing power input from the wired power input from interfering with wireless charging, thereby improving the reliability and safety of wireless charging.

[0168] The first switch unit may include a first control switch T1, the control electrode of which is connected to the controller, the first electrode of which is respectively connected to the first bridge arm and the first processing unit, and the second electrode of which is connected to the wired power input terminal. The second switch unit may include a second control switch T2, the control electrode of which is connected to the controller, the first electrode of which is respectively connected to the second bridge arm and the second processing unit, and the second electrode of which is 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 first and second 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.

[0169] Continuing with reference to Figure 14, 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 first 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 second 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.

[0170] 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.

[0171] 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 in the aforementioned embodiment can be found in the relevant introduction in the aforementioned embodiment, and the repeated parts will not be repeated.

[0172] 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, Comprising: A power receiver, a first bridge arm, a second bridge arm, 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 power receiver is also connected to the midpoint of the second bridge arm. The power receiver is configured to: in response to wireless power transmission, output an AC signal to the midpoints of the first bridge arm and the second bridge arm; The first bridge arm is also respectively connected to the first processing unit, the ground terminal, and the controller. The second bridge arm is also respectively connected to the second processing unit, the ground terminal, and the controller. The controller is configured to: in response to the positive half-cycle signal of the AC signal, control the first bridge arm and the second bridge arm to output the positive half-cycle signal to the first processing unit; in response to the negative half-cycle signal of the AC signal, control the first bridge arm and the second bridge arm to output the positive signal corresponding to the negative half-cycle signal to the second processing unit; The output terminal of the first processing unit is used to be connected to a battery. The first processing unit is configured to: charge the battery in response to the positive half-cycle signal; The output terminal of the second processing unit is used to be connected to the battery. The second processing unit is configured to: charge the battery in response to the positive signal; 2. The wireless power receiving circuit according to claim 1, wherein The DCDC converter further includes a first switching unit and a second switching unit. The DCDC converter further includes a wired power input terminal. The first switching unit is respectively connected to the first processing unit, the wired power input terminal, and the controller. The second switching unit is respectively connected to the second processing unit, the wired power input terminal, and the controller; The controller is further configured to: in response to the AC signal, control the first switching unit to disconnect the wired power input terminal from the first processing unit, and control the second switching unit to disconnect the wired power input terminal from the second processing unit; The first bridge arm is also connected to the first switching unit, and the second bridge arm is also connected to the second switching unit.

3. The wireless power receiving circuit according to claim 1 or 2, characterized in that, The first bridge arm includes: a first bridge arm switch and a second bridge arm switch. The control pole of the first bridge arm switch is connected to the controller. The first pole of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second pole of the second bridge arm switch. The second pole of the first bridge arm switch is connected to the first processing unit. The control pole of the second bridge arm switch is connected to the controller. The first pole of the second bridge arm switch is connected to the ground terminal. The second pole 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. The second electrode of the third bridge arm switch is connected to 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 terminal. 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 a first mode and a 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 a third mode; Wherein, the first mode includes: a mode in which both the second bridge arm switch and the fourth bridge arm switch are turned on. The second mode includes: a mode in which both the first bridge arm switch and the fourth bridge arm switch are turned on. The third mode includes: a mode in which both the second bridge arm switch and the third bridge arm switch are turned on.

4. The wireless power receiving circuit according to claim 3, wherein The first 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 terminal of the first switch is connected to the controller. The first terminal of the first switch is respectively connected to the second terminal of the second switch and the first terminal of the first capacitor. The second terminal of the first switch is respectively connected to the second terminal of the fourth switch and the first terminal of the second capacitor; The control terminal of the second switch is connected to the controller. The first terminal of the second switch is connected to the ground terminal. The second terminal of the second switch is also connected to the first terminal of the first capacitor; The control terminal of the third switch is connected to the controller. The first terminal of the third switch is respectively connected to the second terminal of the seventh switch and the first terminal of the third capacitor. The second terminal of the third switch is respectively connected to the second terminal of the first capacitor and the first bridge arm; The control terminal of the fourth switch is connected to the controller. The first terminal of the fourth switch is respectively connected to the second terminal of the fifth switch, the battery, the first terminal of the seventh switch, and the second terminal of the eighth switch. The second terminal of the fourth switch is also connected to the first terminal of the second capacitor; The control terminal of the fifth switch is connected to the controller. The first terminal of the fifth switch is respectively connected to the second terminal of the sixth switch and the second terminal of the second capacitor. The second terminal of the fifth switch is also connected to the battery; The control terminal of the sixth switch is connected to the controller. The first terminal of the sixth switch is connected to the ground terminal. The second terminal of the sixth switch is also connected to the second terminal of the second capacitor; The control terminal of the seventh switch is connected to the controller. The first terminal of the seventh switch is also connected to the battery. The second terminal of the seventh switch is also connected to the first terminal of the third capacitor; The control terminal of the eighth switch is connected to the controller. The first terminal of the eighth switch is respectively connected to the second terminal of the third capacitor and the second terminal of the ninth switch. The second terminal of the eighth switch is also connected to the battery; The control terminal of the ninth switch is connected to the controller. The first terminal of the ninth switch is connected to the ground terminal. The second terminal of the ninth switch is also connected to the second terminal of the third capacitor.

5. The wireless power receiving circuit according to claim 4, wherein The controller is further configured to: in response to the positive half-cycle signal, control the first processing unit to switch among 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 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 includes the first state, the second state, and the third state.

6. The wireless power receiving circuit according to any one of claims 3-5, characterized in that, The second processing unit includes: a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a fourth capacitor, a fifth capacitor, and a sixth 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 eleventh switch and the first terminal of the fourth capacitor. The second terminal of the tenth switch is respectively connected to the second terminal of the thirteenth switch and the first terminal of the fifth capacitor; 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. The second terminal of the eleventh switch is also connected to the first terminal of the fourth capacitor; The control terminal of the twelfth switch is connected to the controller. The first terminal of the twelfth switch is respectively connected to the second terminal of the sixteenth switch and the first terminal of the sixth capacitor. The second terminal of the twelfth switch is respectively connected to the second terminal of the fourth capacitor and the second bridge arm; The control terminal of the thirteenth switch is connected to the controller. The first terminal of the thirteenth switch is respectively connected to the second terminal of the fourteenth switch, the battery, the first terminal of the sixteenth switch, and the second terminal of the seventeenth switch. The second terminal of the thirteenth switch is also connected to the first terminal of the fifth capacitor; The control terminal of the fourteenth switch is connected to the controller. The first terminal of the fourteenth switch is respectively connected to the second terminal of the fifteenth switch and the second terminal of the fifth capacitor. The second terminal of the fourteenth switch is also connected to the battery; The control terminal of the fifteenth switch is connected to the controller. The first terminal of the fifteenth switch is connected to the ground terminal. The second terminal of the fifteenth switch is also connected to the second 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 also connected to the battery, and the second terminal of the sixteenth switch is also connected to the first terminal of the sixth capacitor; The control terminal of the seventeenth switch is connected to the controller. The first terminal of the seventeenth switch is respectively connected to the second terminal of the sixth capacitor and the second terminal of the eighteenth switch, and the second terminal of the seventeenth switch is also connected to the battery; The control terminal of the eighteenth switch is connected to the controller. The first terminal of the eighteenth switch is connected to the ground terminal, and the second terminal of the eighteenth switch is also connected to the second terminal of the sixth capacitor.

7. The wireless power receiving circuit according to claim 6, wherein The controller is further configured to: in response to the positive signal, control the second processing unit to switch among a fourth state, a fifth state, and a sixth state; Wherein, the fourth state includes a state in which the eleventh switch, the twelfth switch, the thirteenth switch, the fifteenth switch, and the seventeenth switch are all turned on; the fifth state includes a state in which the tenth switch, the thirteenth switch, the fifteenth switch, the sixteenth switch, and the eighteenth switch are all turned on; the sixth state includes a state in which the tenth switch, the fourteenth switch, the sixteenth switch, and the eighteenth switch are all turned on; The first mode includes the fourth state, and the third mode includes the fourth state, the fifth state, and the sixth state.

8. The wireless power receiving circuit according to claim 3, wherein The first processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, a first capacitor, a second capacitor, and a third capacitor; The control terminal of the first switch is connected to the controller. The first terminal of the first switch is respectively connected to the second terminal of the second switch and the first terminal of the third capacitor, and the second terminal of the first switch is respectively connected to the first leg and the first terminal of the first capacitor; The control terminal of the second switch is connected to the controller. The first terminal of the second switch is respectively connected to the first terminal of the second capacitor and the second terminal of the third switch, and the second terminal of the second switch is also connected to the first terminal of the third capacitor; The control terminal of the third switch is connected to the controller. The first terminal of the third switch is respectively connected to the second terminal of the fourth switch, the second terminal of the sixth switch, and the battery, and the second terminal of the third switch is also connected to the first terminal of the second capacitor; The control terminal of the fourth switch is connected to the controller. The first terminal of the fourth switch is respectively connected to the second terminal of the fifth switch, the second terminal of the first capacitor, and the second terminal of the second capacitor, and the second terminal of the fourth switch is also connected to the battery; The control terminal of the fifth switch is connected to the controller. The first terminal of the fifth switch is connected to the ground terminal, and the second terminal of the fifth switch is also respectively connected to the second terminal of the first capacitor and the second terminal of the second capacitor; The control terminal of the sixth switch is connected to the controller. The first terminal of the sixth switch is respectively connected to the second terminal of the seventh switch and the second terminal of the third capacitor. The second terminal of the sixth switch is also connected to the battery. The control terminal of the seventh switch is connected to the controller. The first terminal of the seventh switch is connected to the ground terminal. The second terminal of the seventh switch is also connected to the second terminal of the third capacitor.

9. The wireless power receiving circuit according to claim 8, 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 and a second state. Wherein, the first state includes: a state in which the first switch, the third switch, the fifth switch, and the sixth switch are all turned on; the second state includes: a state in which the second switch, the fourth switch, and the seventh switch are all turned on. The first mode includes the first state, and the second mode includes: the first state and the second state.

10. The wireless power receiving circuit according to claim 3, 8 or 9, characterized in that The second processing unit includes: an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor. The control terminal of the eighth switch is connected to the controller. The first terminal of the eighth switch is respectively connected to the second terminal of the ninth switch and the first terminal of the sixth capacitor. The second terminal of the eighth switch is respectively connected to the second bridge arm and the first terminal of the fourth capacitor. The control terminal of the ninth switch is connected to the controller. The first terminal of the ninth switch is respectively connected to the first terminal of the fifth capacitor and the second terminal of the tenth switch. The second terminal of the ninth switch is also connected to the first terminal of the sixth 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 eleventh switch, the second terminal of the thirteenth switch, and the battery. The second terminal of the tenth switch is also connected to the first terminal of the fifth capacitor. The control terminal of the eleventh switch is connected to the controller. The first terminal of the eleventh switch is respectively connected to the second terminal of the twelfth switch, the second terminal of the fourth capacitor, and the second terminal of the fifth capacitor. The second terminal of the eleventh switch is also connected to the battery. The control terminal of the twelfth switch is connected to the controller. The first terminal of the twelfth switch is connected to the ground terminal. The second terminal of the twelfth switch is also respectively connected to the second terminal of the fourth capacitor and the second terminal of the fifth capacitor. The control terminal of the thirteenth switch is connected to the controller. The first terminal of the thirteenth switch is respectively connected to the second terminal of the fourteenth switch and the second terminal of the sixth capacitor. The second terminal of the thirteenth switch is also connected to the battery. The control terminal of the fourteenth switch is connected to the controller. The first terminal of the fourteenth switch is connected to the ground terminal. The second terminal of the fourteenth switch is also connected to the second terminal of the sixth capacitor.

11. The wireless power receiving circuit according to claim 10, wherein The controller is further configured to: in response to the positive signal, control the second processing unit to switch between a third state and a fourth state. Wherein, the third state includes: a state in which the eighth switch, the tenth switch, the twelfth switch, and the thirteenth switch are all turned on; the fourth state includes: a state in which the ninth switch, the eleventh switch, and the fourteenth switch are all turned on; The first mode includes the third state, and the third mode includes: the third state and the fourth state.

12. The wireless power receiving circuit according to claim 3, wherein The first processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, a first capacitor, a second capacitor, and a third capacitor; The control terminal of the first switch is connected to the controller, the first terminal of the first switch is respectively connected to the second terminal of the second switch and the first terminal of the first capacitor, and the second terminal of the first switch is respectively connected to the second terminal of the fourth switch and the first terminal of the second capacitor; The control terminal of the second switch is connected to the controller, the first terminal of the second switch is connected to the ground terminal, and the second terminal of the second switch is also respectively connected to the first terminal of the first capacitor and the second terminal of the second capacitor; The control terminal of the third switch is connected to the controller, the first terminal of the third switch is respectively connected to the first terminal of the fourth switch, the second terminal of the fifth switch, and the first terminal of the third capacitor, and the second terminal of the third switch is respectively connected to the second terminal of the first capacitor and the first bridge arm; The control terminal of the fourth switch is connected to the controller, the first terminal of the fourth switch is also connected to the first terminal of the third capacitor, and the second terminal of the fourth switch is also connected to the first terminal of the second capacitor; The control terminal of the fifth switch is connected to the controller, the first terminal of the fifth switch is respectively connected to the second terminal of the sixth switch and the battery, and the second terminal of the fifth switch is also connected to the first terminal of the third capacitor; The control terminal of the sixth switch is connected to the controller, the first terminal of the sixth switch is respectively connected to the second terminal of the seventh switch and the second terminal of the third capacitor, and the second terminal of the sixth switch is also connected to the battery; The control terminal of the seventh switch is connected to the controller, the first terminal of the seventh switch is also connected to the ground terminal, and the second terminal of the seventh switch is also connected to the second terminal of the third capacitor.

13. The wireless power receiving circuit according to claim 12, wherein The controller is further configured to: in response to the positive half-cycle signal, control the first processing unit to switch between the first state and the second 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 turned on; the second state includes: a state in which the first switch, the fifth switch, and the seventh switch are all turned on; The first mode includes the first state, and the second mode includes: the first state and the second state.

14. The wireless power receiving circuit according to claim 3, 11 or 12, characterized in that, The second processing unit includes: an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fourth capacitor, a fifth capacitor, and a sixth capacitor; The control terminal of the eighth switch is connected to the controller. The first terminal of the eighth switch is respectively connected to the second terminal of the ninth switch and the first terminal of the fourth capacitor. The second terminal of the eighth switch is respectively connected to the second terminal of the eleventh switch and the first terminal of the fifth capacitor; The control terminal of the ninth switch is connected to the controller. The first terminal of the ninth switch is connected to the ground terminal. The second terminal of the ninth switch is also respectively connected to the first terminal of the fourth capacitor and the second terminal of the fifth 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 first terminal of the eleventh switch, the second terminal of the twelfth switch, and the first terminal of the sixth capacitor. The second terminal of the tenth switch is respectively connected to the second terminal of the fourth capacitor and the second bridge arm; The control terminal of the eleventh switch is connected to the controller. The first terminal of the eleventh switch is also connected to the first terminal of the sixth capacitor. The second terminal of the eleventh switch is also connected to the first terminal of the fifth capacitor; The control terminal of the twelfth switch is connected to the controller. The first terminal of the twelfth switch is respectively connected to the second terminal of the thirteenth switch and the battery. The second terminal of the twelfth switch is also connected to the first terminal of the sixth capacitor; The control terminal of the thirteenth switch is connected to the controller. The first terminal of the thirteenth switch is respectively connected to the second terminal of the fourteenth switch and the second terminal of the sixth capacitor. The second terminal of the thirteenth switch is also connected to the battery; The control terminal of the fourteenth switch is connected to the controller. The first terminal of the fourteenth switch is also connected to the ground terminal. The second terminal of the fourteenth switch is also connected to the second terminal of the sixth capacitor.

15. The wireless power receiving circuit according to claim 14, characterized in that, The controller is further configured to: in response to the positive signal, control the second processing unit to switch between the third state and the fourth state; Wherein, the third state includes: a state in which the ninth switch, the tenth switch, the eleventh switch, and the thirteenth switch are all turned on; the fourth state includes: a state in which the eighth switch, the twelfth switch, and the fourteenth switch are all turned on; The first mode includes the third state, and the third mode includes: the third state and the fourth state.

16. The wireless power receiving circuit according to claim 3, characterized in that, The first 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 terminal of the first switch is connected to the controller. The first terminal of the first switch is respectively connected to the first terminal of the first capacitor and the first bridge arm. The second terminal of the first switch is respectively connected to the second terminal of the fourth switch, the second terminal of the seventh switch, the second terminal of the ninth switch, and the battery; The control terminal of the second switch is connected to the controller. The first terminal of the second switch is connected to the ground terminal. The second terminal of the second switch is respectively connected to the second terminal of the first capacitor and the second terminal of the third switch; The control terminal of the third switch is connected to the controller. The first terminal of the third switch is respectively connected to the first terminal of the fourth switch and the first terminal of the second capacitor. The second terminal of the third switch is also connected to the second terminal of the first capacitor; The control terminal of the fourth switch is connected to the controller. The first terminal of the fourth switch is also connected to the first terminal of the second capacitor. The second terminal of the fourth switch is also connected to the battery; The control terminal of the fifth switch is connected to the controller. The first terminal of the fifth switch is connected to the ground terminal. The second terminal of the fifth switch is respectively connected to the second terminal of the second capacitor and the second terminal of the sixth switch; The control terminal of the sixth switch is connected to the controller. The first terminal of the sixth switch is respectively connected to the first terminal of the third capacitor and the first terminal of the seventh switch. The second terminal of the sixth switch is also connected to the second terminal of the second capacitor; The control terminal of the seventh switch is connected to the controller. The first terminal of the seventh switch is also connected to the first terminal of the third capacitor. 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. The second terminal of the eighth switch is respectively connected to the second terminal of the third capacitor and the first terminal of the ninth switch; The control terminal of the ninth switch is connected to the controller. The first terminal of the ninth switch is also connected to the second terminal of the third capacitor. The second terminal of the ninth switch is also connected to the battery.

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

18. The wireless power receiving circuit according to claim 3, 16 or 17, characterized in that, The second processing unit includes: a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a fourth capacitor, a fifth capacitor, and a sixth 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 first terminal of the fourth capacitor and the second bridge arm. The second terminal of the tenth switch is respectively connected to the second terminal of the thirteenth switch, the second terminal of the sixteenth switch, the second terminal of the eighteenth switch, and 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. The second terminal of the eleventh switch is respectively connected to the second terminal of the fourth capacitor and the second terminal of the twelfth switch; The control terminal of the twelfth switch is connected to the controller. The first terminal of the twelfth switch is respectively connected to the first terminal of the thirteenth switch and the first terminal of the fifth capacitor. The second terminal of the twelfth switch is also connected to the second terminal of the fourth capacitor; The control terminal of the thirteenth switch is connected to the controller. The first terminal of the thirteenth switch is also connected to the first terminal of the fifth capacitor. The second terminal of the thirteenth switch is also connected to the battery; The control terminal of the fourteenth switch is connected to the controller. The first terminal of the fourteenth switch is connected to the ground terminal. The second terminal of the fourteenth switch is respectively connected to the second terminal of the fifth capacitor and the second terminal of the fifteenth switch; The control terminal of the fifteenth switch is connected to the controller. The first terminal of the fifteenth switch is respectively connected to the first terminal of the sixth capacitor and the first terminal of the sixteenth switch. The second terminal of the fifteenth switch is also connected to the second 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 also connected to the first terminal of the sixth capacitor. 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. The second terminal of the seventeenth switch is respectively connected to the second terminal of the sixth capacitor and the first terminal of the eighteenth switch; The control terminal of the eighteenth switch is connected to the controller. The first terminal of the eighteenth switch is also connected to the second terminal of the sixth capacitor. The second terminal of the eighteenth switch is also connected to the battery.

19. The wireless power receiving circuit according to claim 18, wherein The controller is further configured to: in response to the positive signal, control the second processing unit to switch among a fifth state, a sixth state, a seventh state, and an eighth state; Wherein, the fifth state includes a state in which the tenth switch, the eleventh switch, the thirteenth switch, the fourteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the sixth state includes a state in which the twelfth switch, the thirteenth switch, the fourteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the seventh state includes a state in which the twelfth switch, the fifteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the eighth state includes a state in which the twelfth switch, the fifteenth switch, and the eighteenth switch are all turned on; The first mode includes the fifth state. The third mode includes: the fifth state, the sixth state, the seventh state, and the eighth state.

20. The wireless power receiving circuit according to claim 3, wherein The first 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 terminal of the first switch is connected to the controller. The first terminal of the first switch is respectively connected to the second terminal of the second switch and the first terminal of the first capacitor. The second terminal of the first switch is respectively connected to the second terminal of the fourth switch and the first terminal of the second capacitor. The control terminal of the second switch is connected to the controller. The first terminal of the second switch is connected to the ground terminal, and the second terminal of the second switch is further connected to the first terminal of the first capacitor. The control terminal of the third switch is connected to the controller. The first terminal of the third switch is respectively connected to the first terminal of the fourth switch, the second terminal of the fifth switch, and the battery. The second terminal of the third switch is respectively connected to the second terminal of the first capacitor and the first bridge arm. The control terminal of the fourth switch is connected to the controller. The first terminal of the fourth switch is further connected to the battery, and the second terminal of the fourth switch is further connected to the first terminal of the second capacitor. The control terminal of the fifth switch is connected to the controller. The first terminal of the fifth switch is respectively connected to the second terminal of the sixth switch and the second terminal of the second capacitor. The second terminal of the fifth switch is further connected to the battery. The control terminal of the sixth switch is connected to the controller. The first terminal of the sixth switch is connected to the ground terminal, and the second terminal of the sixth switch is further connected to the second terminal of the second capacitor.

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

22. The wireless power receiving circuit according to claim 3, 20 or 21, characterized in that, The second processing unit includes: a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a third capacitor, and a fourth 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 first terminal of the third capacitor. The second terminal of the seventh switch is respectively connected to the second terminal of the tenth switch and the first terminal of the fourth capacitor. 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 further connected to the first terminal of the third capacitor. The control terminal of the ninth switch is connected to the controller. The first terminal of the ninth switch is respectively connected to the first terminal of the tenth switch, the second terminal of the eleventh switch, and the battery. The second terminal of the ninth switch is respectively connected to the second terminal of the third capacitor and the second bridge arm. The control terminal of the tenth switch is connected to the controller. The first terminal of the tenth switch is also connected to the battery, and the second terminal of the tenth switch is also connected to the first terminal of the fourth capacitor; The control terminal of the eleventh switch is connected to the controller. The first terminal of the eleventh switch is respectively connected to the second terminal of the twelfth switch and the second terminal of the fourth capacitor, and the second terminal of the eleventh switch is also connected to the battery; The control terminal of the twelfth switch is connected to the controller. The first terminal of the twelfth switch is connected to the ground terminal, and the second terminal of the twelfth switch is also connected to the second terminal of the fourth capacitor.

23. The wireless power receiving circuit according to claim 22, wherein The controller is further configured to: in response to the positive signal, control the second processing unit to switch among a fourth state, a fifth state, and a sixth state; Wherein, the fourth state includes: a state in which the eighth switch, the ninth switch, the tenth switch, and the twelfth switch are all turned on; the fifth state includes: a state in which the seventh switch, the tenth switch, and the twelfth switch are all turned on; the sixth state includes: a state in which the seventh switch and the eleventh switch are all turned on; The first mode includes the fourth state, and the third mode includes: the fourth state, the fifth state, and the sixth state.

24. A wireless charging system, characterized in that, Comprising: A charging device and at least one power receiving device, the power receiving device comprising: a battery, and a wireless power receiving circuit according to any one of claims 1-23; The charging device is configured to: provide electromagnetic waves to the wireless power receiving circuit; The wireless power receiving circuit is configured to: charge the battery in response to the electromagnetic waves.

25. An electronic device, characterized in that, Comprising: A wireless power receiving circuit according to any one of claims 1-23 and a battery, the wireless power receiving circuit being connected to the battery.

26. A charging method, characterized in that, The charging method includes: The power receiver outputs an AC signal to the midpoint of each arm of the plurality of arms in response to wireless power transmission; The controller, in response to the positive half-cycle signal of the AC signal, controls the plurality of arms to output the positive half-cycle signal to the first processing unit, so that the first processing unit charges the battery according to the positive half-cycle signal; The controller, in response to the negative half-cycle signal of the AC signal, controls the plurality of arms to output a positive signal corresponding to the negative half-cycle signal to the second processing unit, so that the second processing unit charges the battery according to the positive signal.

27. The charging method according to claim 26, wherein Controlling the plurality of arms to output the positive half-cycle signal to the first processing unit in response to the positive half-cycle signal of the AC signal includes: in response to the positive half-cycle signal, controlling the plurality of arms to switch between a first mode and a second mode; Controlling the plurality of arms to output a positive signal corresponding to the negative half-cycle signal to the second processing unit in response to the negative half-cycle signal of the AC signal includes: in response to the positive signal, controlling the plurality of arms to switch between the first mode and a third mode; Among them, the multiple bridge arms include a first bridge arm and a second bridge arm. The first bridge arm includes: a first bridge arm switch and a second bridge arm switch. The control end of the first bridge arm switch is connected to the controller. The first end of the first bridge arm switch is respectively connected to the positive electrode of the power receiver and the second end of the second bridge arm switch. The second end of the first bridge arm switch is connected to the first processing unit. The control end of the second bridge arm switch is connected to the controller. The first end of the second bridge arm switch is connected to the ground terminal. The second end 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 end of the third bridge arm switch is connected to the controller. The first end of the third bridge arm switch is respectively connected to the negative electrode of the power receiver and the second end of the fourth bridge arm switch. The second end of the third bridge arm switch is connected to the second processing unit. The control end of the fourth bridge arm switch is connected to the controller. The first end of the fourth bridge arm switch is connected to the ground terminal. The second end 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 both the second bridge arm switch and the fourth bridge arm switch are turned on. The second mode includes: a mode in which both the first bridge arm switch and the fourth bridge arm switch are turned on. The third mode includes: a mode in which both the second bridge arm switch and the third bridge arm switch are turned on.

28. The charging method according to claim 27, wherein Charging the battery according to the positive half-cycle signal includes: the controller, in response to the positive half-cycle signal, controls the first processing unit to switch among a first state, a second state, and a third state; Among them, the first 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 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 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 and the first 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, 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; the first state includes: the state where 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 state where 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 state where 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 includes: the first state, the second state, and the third state.

29. The charging method according to claim 27 or 28, characterized in that, Charging the battery according to the positive signal includes: in response to the positive signal, the controller controls the second processing unit to switch among a fourth state, a fifth state, and a sixth state; Among them, the second processing unit includes: a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a fourth capacitor, a fifth capacitor, and a sixth 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 eleventh switch and the first terminal of the fourth capacitor, and the second terminal of the tenth switch is respectively connected to the second terminal of the thirteenth switch and the first terminal of the fifth capacitor; 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 first terminal of the fourth capacitor; the control terminal of the twelfth switch is connected to the controller, the first terminal of the twelfth switch is respectively connected to the second terminal of the sixteenth switch and the first terminal of the sixth capacitor, and the second terminal of the twelfth switch is respectively connected to the second terminal of the fourth capacitor and the second bridge arm; the control terminal of the thirteenth switch is connected to the controller, the first terminal of the thirteenth switch is respectively connected to the second terminal of the fourteenth switch, the battery, the first terminal of the sixteenth switch, and the second terminal of the seventeenth switch, and the second terminal of the thirteenth switch is also connected to the first terminal of the fifth capacitor; the control terminal of the fourteenth switch is connected to the controller, the first terminal of the fourteenth switch is respectively connected to the second terminal of the fifteenth switch and the second terminal of the fifth capacitor, and the second terminal of the fourteenth switch is also connected to the battery; the control terminal of the fifteenth switch is connected to the controller, the first terminal of the fifteenth switch is connected to the ground terminal, and the second terminal of the fifteenth switch is also connected to the second 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 also connected to the battery, and the second terminal of the sixteenth switch is also connected to the first terminal of the sixth capacitor; the control terminal of the seventeenth switch is connected to the controller, the first terminal of the seventeenth switch is respectively connected to the second terminal of the sixth capacitor and the second terminal of the eighteenth switch, and the second terminal of the seventeenth switch is also connected to the battery; the control terminal of the eighteenth switch is connected to the controller, the first terminal of the eighteenth switch is connected to the ground terminal, and the second terminal of the eighteenth switch is also connected to the second terminal of the sixth capacitor; the fourth state includes: the state where the eleventh switch, the twelfth switch, the thirteenth switch, the fifteenth switch, and the seventeenth switch are all turned on; the fifth state includes: the state where the tenth switch, the thirteenth switch, the fifteenth switch, the sixteenth switch, and the eighteenth switch are all turned on; the sixth state includes: the state where the tenth switch, the fourteenth switch, the sixteenth switch, and the eighteenth switch are all turned on; the first mode includes the fourth state, and the third mode includes: the fourth state, the fifth state, and the sixth state.

30. The charging method according to claim 27, wherein Charging the battery according to the positive half-cycle signal includes: the controller controls the first processing unit to switch between a first state and a second state in response to the positive half-cycle signal; Wherein, the first processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, a first capacitor, a second capacitor and a third capacitor; the control terminal of the first switch is connected to the controller, the first terminal of the first switch is respectively connected to the second terminal of the second switch and the first terminal of the third capacitor, and the second terminal of the first switch is respectively connected to the first bridge arm and the first terminal of the first capacitor; the control terminal of the second switch is connected to the controller, the first terminal of the second switch is respectively connected to the first terminal of the second capacitor and the second terminal of the third switch, and the second terminal of the second switch is also connected to the first terminal of the third capacitor; the control terminal of the third switch is connected to the controller, the first terminal of the third switch is respectively connected to the second terminal of the fourth switch, the second terminal of the sixth switch and the battery, and the second terminal of the third switch is also connected to the first terminal of the second capacitor; the control terminal of the fourth switch is connected to the controller, the first terminal of the fourth switch is respectively connected to the second terminal of the fifth switch, the second terminal of the first capacitor and the second terminal of the second capacitor, and the second terminal of the fourth switch is also connected to the battery; the control terminal of the fifth switch is connected to the controller, the first terminal of the fifth switch is connected to the ground terminal, and the second terminal of the fifth switch is also respectively connected to the second terminal of the first capacitor and the second terminal of the second capacitor; the control terminal of the sixth switch is connected to the controller, the first terminal of the sixth switch is respectively connected to the second terminal of the seventh switch and the second terminal of the third capacitor, and the second terminal of the sixth switch is also connected to the battery; the control terminal of the seventh switch is connected to the controller, the first terminal of the seventh switch is connected to the ground terminal, and the second terminal of the seventh switch is also connected to the second terminal of the third capacitor; the first state includes: a state in which the first switch, the third switch, the fifth switch and the sixth switch are all turned on; the second state includes: a state in which the second switch, the fourth switch and the seventh switch are all turned on; the first mode includes the first state, and the second mode includes: the first state and the second state.

31. The charging method according to claim 27 or 30, characterized in that, Charging the battery according to the positive signal includes: the controller controls the second processing unit to switch between a third state and a fourth state in response to the positive signal; Among them, the second processing unit includes: an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fourth capacitor, a fifth capacitor, and a sixth 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 ninth switch and the first end of the sixth capacitor, and the second end of the eighth switch is respectively connected to the second bridge arm and the first end of the 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 first end of the fifth capacitor and the second end of the tenth switch, and the second end of the ninth switch is also connected to the first end of the sixth 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 eleventh switch, the second end of the thirteenth switch, and the battery, and the second end of the tenth switch is also connected to the first end of the fifth capacitor; 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, the second end of the fourth capacitor, and the second end of the fifth capacitor, and the second end of the eleventh switch is also connected to the battery; the control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is connected to the ground end, and the second end of the twelfth switch is also respectively connected to the second end of the fourth capacitor and the second 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 respectively connected to the second end of the fourteenth switch and the second end of the sixth 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 end, and the second end of the fourteenth switch is also connected to the second end of the sixth capacitor; the third state includes: a state where the eighth switch, the tenth switch, the twelfth switch, and the thirteenth switch are all turned on; the fourth state includes: a state where the ninth switch, the eleventh switch, and the fourteenth switch are all turned on; the first mode includes the third state, and the third mode includes: the third state and the fourth state.

32. The charging method according to claim 27, wherein Charging the battery according to the positive half-cycle signal includes: the controller responds to the positive half-cycle signal and controls the first processing unit to switch between the first state and the second state; Among them, the first processing unit includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh 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 respectively connected to the first end of the first capacitor and the second end of the 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 first end of the fourth switch, the second end of the fifth 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 and the first 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 first end of the third capacitor, 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 battery, and the second end of the fifth switch is also connected to the first end of the third capacitor; 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 and the second end of the third capacitor, and the second end of the sixth switch is also connected to the battery; the control end of the seventh switch is connected to the controller, the first end of the seventh switch is also connected to the ground end, and the second end of the seventh switch is also 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, and the sixth switch are all turned on; the second state includes: a state in which the first switch, the fifth switch, and the seventh switch are all turned on; the first mode includes the first state, and the second mode includes: the first state and the second state.

33. The charging method according to claim 27 or 32, characterized in that, Charging the battery according to the positive signal includes: the controller, in response to the positive signal, controls the second processing unit to switch between a third state and a fourth state; Among them, the second processing unit includes: an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fourth capacitor, a fifth capacitor, and a sixth 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 ninth switch and the first end of the fourth capacitor, and the second end of the eighth switch is respectively connected to the second end of the eleventh switch and the first end of the fifth capacitor; 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 respectively connected to the first end of the fourth capacitor and the second end of the fifth 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 first end of the eleventh switch, the second end of the twelfth switch, and the first end of the sixth capacitor, and the second end of the tenth switch is respectively connected to the second end of the fourth capacitor and the second bridge arm; the control end of the eleventh switch is connected to the controller, the first end of the eleventh switch is also connected to the first end of the sixth capacitor, and the second end of the eleventh switch is also connected to the first end of the fifth 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 and the battery, and the second end of the twelfth switch is also connected to the first end of the sixth 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 sixth 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 also connected to the ground terminal, and the second end of the fourteenth switch is also connected to the second end of the sixth capacitor; the third state includes: the state where the ninth switch, the tenth switch, the eleventh switch, and the thirteenth switch are all turned on; the fourth state includes: the state where the eighth switch, the twelfth switch, and the fourteenth switch are all turned on; the first mode includes the third state, and the third mode includes: the third state and the fourth state.

34. The charging method according to claim 27, wherein, Charging the battery according to the positive half-cycle signal includes: the controller, in response to the positive half-cycle signal, controls the first processing unit to switch between the first state, the second state, the third state, and the fourth state; Among them, the first 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 first end of the first capacitor and the first bridge arm, and the second end of the first switch is respectively connected to the second end of the fourth switch, the second end of the seventh switch, the second end of the ninth 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 respectively connected to the second end of the first capacitor and the second end of the third switch; 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 and the first end of the second capacitor, and the second end of the third switch is also connected to the second end of the first 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 first end of the second capacitor, and the second end of the fourth switch is also connected to the battery; the control end of the fifth switch is connected to the controller, the first end of the fifth switch is connected to the ground end, and the second end of the fifth switch is respectively connected to the second end of the second capacitor and the second end of the sixth switch; the control end of the sixth switch is connected to the controller, the first end of the sixth switch is respectively connected to the first end of the third capacitor and the first end of the seventh switch, 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 first end of the third 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 end, and the second end of the eighth switch is respectively connected to the second end of the third capacitor and the first end of the ninth switch; the control end of the ninth switch is connected to the controller, the first end of the ninth switch is also connected to the second end of the third capacitor, and the second end of the ninth switch is also connected to the battery; the first state includes: the state in which the first switch, the second switch, the fourth switch, the fifth switch, the seventh switch and the eighth switch are all turned on; the second state includes: the state in which the third switch, the fourth switch, the fifth switch, the seventh switch and the eighth switch are all turned on; the third state includes: the state in which the third switch, the sixth switch, the seventh switch and the eighth switch are all turned on; the fourth state includes: the state in which the third switch, the sixth switch and the ninth switch are all turned on; the first mode includes the first state, and the second mode includes: the first state, the second state, the third state and the fourth state.

35. The charging method according to claim 27 or 34, characterized in that, Charging the battery according to the positive signal includes: the controller controls the second processing unit to switch among a fifth state, a sixth state, a seventh state, and an eighth state in response to the positive signal; Among them, the second processing unit includes: a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, an eighteenth switch, a fourth capacitor, a fifth capacitor, and a sixth 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 first end of the fourth capacitor and the second bridge arm, and the second end of the tenth switch is respectively connected to the second end of the thirteenth switch, the second end of the sixteenth switch, the second end of the eighteenth switch, and 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 respectively connected to the second end of the fourth capacitor and the second end of the twelfth switch; the control end of the twelfth switch is connected to the controller, the first end of the twelfth switch is respectively connected to the first end of the thirteenth switch and the first end of the fifth capacitor, and the second end of the twelfth switch is further connected to the second 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 further connected to the first end of the fifth 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 end, and the second end of the fourteenth switch is respectively connected to the second end of the fifth capacitor and the second end of the fifteenth switch; 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 sixth capacitor and the first end of the sixteenth switch, and the second end of the fifteenth switch is further connected to the second end of the fifth capacitor; the control end of the sixteenth switch is connected to the controller, the first end of the sixteenth switch is further connected to the first end of the sixth capacitor, and the 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 respectively connected to the second end of the sixth capacitor and the first end of the eighteenth switch; the control end of the eighteenth switch is connected to the controller, the first end of the eighteenth switch is further connected to the second end of the sixth capacitor, and the second end of the eighteenth switch is further connected to the battery; the fifth state includes: a state where the tenth switch, the eleventh switch, the thirteenth switch, the fourteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the sixth state includes: a state where the twelfth switch, the thirteenth switch, the fourteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the seventh state includes: a state where the twelfth switch, the fifteenth switch, the sixteenth switch, and the seventeenth switch are all turned on; the eighth state includes: a state where the twelfth switch, the fifteenth switch, and the eighteenth switch are all turned on;The first mode includes the fifth state, and the third mode includes: the fifth state, the sixth state, the seventh state, and the eighth state.; 36. The charging method according to claim 27, wherein Charging the battery according to the positive half-cycle signal includes: the controller controls the first processing unit to switch among 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 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 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 and the first bridge arm; the control end of the fourth switch is connected to the controller, the first end of the fourth 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: the state where the second switch, the third switch, the fourth switch, and the sixth switch are all turned on; the second state includes: the state where the first switch, the fourth switch, and the sixth switch are all turned on; the third state includes: the state where the first switch and the fifth switch are both turned on; the first mode includes the first state, and the second mode includes: the first state, the second state, and the third state.

37. The charging method according to claim 27 or 36, characterized in that, Charging the battery according to the positive signal includes: the controller controls the second processing unit to switch among a fourth state, a fifth state, and a sixth state in response to the positive signal; Wherein, the second processing unit includes: a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a third capacitor and a fourth capacitor; a control end of the seventh switch is connected to the controller, a first end of the seventh switch is respectively connected to a second end of the eighth switch and a first end of the third capacitor, and a second end of the seventh switch is respectively connected to a second end of the tenth switch and a first end of the fourth capacitor; a control end of the eighth switch is connected to the controller, a first end of the eighth switch is connected to the ground end, and the second end of the eighth switch is further connected to the first end of the third capacitor; a control end of the ninth switch is connected to the controller, a first end of the ninth switch is respectively connected to a first end of the tenth switch, a second end of the eleventh switch and the battery, and a second end of the ninth switch is respectively connected to a second end of the third capacitor and the second bridge arm; a control end of the tenth switch is connected to the controller, the first end of the tenth switch is further connected to the battery, and the second end of the tenth switch is further connected to the first end of the fourth capacitor; a control end of the eleventh switch is connected to the controller, a first end of the eleventh switch is respectively connected to a second end of the twelfth switch and a second end of the fourth capacitor, and the second end of the eleventh switch is further connected to the battery; a control end of the twelfth switch is connected to the controller, a first end of the twelfth switch is connected to the ground end, and the second end of the twelfth switch is further connected to the second end of the fourth capacitor; the fourth state includes a state where the eighth switch, the ninth switch, the tenth switch and the twelfth switch are all turned on; the fifth state includes a state where the seventh switch, the tenth switch and the twelfth switch are all turned on; the sixth state includes a state where the seventh switch and the eleventh switch are all turned on; the first mode includes the fourth state, and the third mode includes: the fourth state, the fifth state and the sixth state.

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