Wireless charging receiving module and electronic equipment

Abstract

The utility model relates to the field of wireless charging technology, and in particular to a wireless charging receiving module and an electronic device. The wireless charging receiving module includes: an electric energy conversion unit; when the working mode corresponding to the electric energy conversion unit is a constant current output mode, the electric energy conversion unit converts the input electric energy into constant current electricity and outputs constant current electricity. The utility model adopting the above scheme can reduce the area occupied by the device on the electronic device and reduce the cost of the electronic device.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless charging, in particular to a wireless charging receiving module and an electronic device. Background Art

[0002] Wireless charging is a technology that uses magnetic fields or electromagnetic waves to transmit power without using connectors or metal contacts as a medium. Setting a wireless charging receiving module in an electronic device can enable the electronic device to have the function of wireless charging.

[0003] In the related art, the wireless charging receiving module in the electronic device can convert the received external energy into constant voltage electricity to the back-end circuit. However, in some application scenarios, the constant voltage electricity cannot directly charge the battery in the electronic device, and an additional charging chip is required to convert the constant voltage electricity into constant current electricity to charge the battery in the electronic device, resulting in a larger area occupied by the device on the electronic device and a higher cost. Utility Model Content

[0004] The utility model provides a wireless charging and receiving module and an electronic device, the main purpose of which is to reduce the area occupied by components on the electronic device and reduce the cost of the electronic device.

[0005] According to one aspect of the utility model, a wireless charging receiving module is provided, comprising: an electric energy conversion unit; wherein:

[0006] When the working mode corresponding to the power conversion unit is the constant current output mode, the power conversion unit converts input power into constant current electricity and outputs the constant current electricity.

[0007] Optionally, in an embodiment of the present utility model, when the working mode corresponding to the electric energy conversion unit is a constant voltage output mode, the electric energy conversion unit converts the input electric energy into constant voltage electricity and outputs the constant voltage electricity.

[0008] Optionally, in one embodiment of the present utility model, the electric energy conversion unit includes a current loop and a voltage loop; wherein,

[0009] When the current loop is in working state, the working mode corresponding to the electric energy conversion unit is a constant current output mode;

[0010] When the voltage loop is in working state, the corresponding working mode of the electric energy conversion unit is a constant voltage output mode.

[0011] Optionally, in one embodiment of the present utility model, the wireless charging receiving module further includes a control unit; wherein,

[0012] The control unit is connected to the control end of the electric energy conversion unit.

[0013] Optionally, in one embodiment of the present utility model, the wireless charging receiving module further includes a rectifying unit; wherein,

[0014] The output end of the rectifying unit is connected to the input end of the power conversion unit, and the rectifying unit converts the AC input power into DC power and outputs the DC power to the power conversion unit.

[0015] Optionally, in one embodiment of the present utility model, the wireless charging receiving module further includes a voltage conversion unit; wherein,

[0016] The input end of the voltage conversion unit is connected to the output end of the rectification unit, and the output end of the voltage conversion unit is connected to the input end of the electric energy conversion unit;

[0017] The voltage conversion unit converts a voltage value corresponding to the direct current into a target voltage value, and inputs the direct current having a voltage value of the target voltage value into the power conversion unit.

[0018] Optionally, in one embodiment of the present invention, the voltage conversion unit includes a step-down voltage conversion circuit; wherein,

[0019] The input end of the step-down voltage conversion circuit is connected to the output end of the rectifier unit, and the output end of the step-down voltage conversion circuit is connected to the input end of the electric energy conversion unit.

[0020] Optionally, in an embodiment of the present utility model, the step-down voltage conversion circuit includes a first switch, a second switch and an inductor; wherein,

[0021] The first end of the first switch is connected to the positive output end of the rectifier unit, the second end of the first switch is respectively connected to the first end of the second switch and the first end of the inductor, the second end of the inductor is connected to the positive input end of the power conversion unit, and the second end of the second switch is respectively connected to the negative output end of the rectifier unit and the negative input end of the power conversion unit.

[0022] According to another aspect of the present invention, an electronic device is provided, comprising: a power module and a wireless charging receiving module as described in any one of the aforementioned aspects.

[0023] Optionally, in one embodiment of the present utility model, the wireless charging receiving module includes a control unit; wherein,

[0024] The output end of the power module is connected to the power monitoring end of the control unit.

[0025] In summary, the wireless charging receiving module and the electronic device provided by the embodiment of the utility model can directly charge the connected battery through the output constant current electricity when the working mode corresponding to the power conversion unit is the constant current output mode. Therefore, there is no need to set up a separate charging chip, which can reduce the area occupied by the components of the electronic device and reduce the cost of the electronic device.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0028] Figure 1 A schematic diagram of a wireless charging architecture in a related technology provided by an embodiment of the utility model;

[0029] Figure 2 A schematic diagram of the structure of a wireless charging receiving module provided by an embodiment of the utility model;

[0030] Figure 3 A schematic diagram of the structure of a wireless charging receiving module provided by another embodiment of the utility model;

[0031] Figure 4 The present invention is a schematic diagram of a wireless charging and receiving module according to an embodiment of the present invention.

[0032] Description of reference numerals: first switch S1, second switch S2, third switch S3, fourth switch S4, fifth switch S5, sixth switch S6, inductor L1. DETAILED DESCRIPTION

[0033] Some embodiments of the utility model will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications and equivalents of the structures described herein will become apparent after understanding the utility model. For example, the connection relationship of the structures described herein is merely an example and is not limited to those connection relationships set forth herein, but can be changed as it becomes apparent after understanding the utility model, except for the connection that must be made with a specific connection relationship. In addition, in order to enhance clarity and brevity, the description of features known in the art may be omitted.

[0034] The embodiments described in some embodiments of the present invention below do not represent all embodiments consistent with the present invention. Instead, they are merely examples of structures consistent with some aspects of the present invention as detailed in the appended claims.

[0035] With the development of science and technology, wireless charging is now increasingly used in mobile consumer products. For example, the market share of mobile phones with wireless charging is increasing. As the technology of mobile phone wireless charging becomes popular, more products will have the function of wireless charging in the future, so that mobile phones can be charged wirelessly. In addition, because wireless charging has advantages such as waterproof and no need to connect cables, more products in different fields are beginning to adopt wireless charging functions. For example, the charging of electric toothbrushes has also begun to use wireless charging technology; in the field of electric vehicles, wireless charging to charge cars will also be a future development direction.

[0036] Figure 1 This is a schematic diagram of a wireless charging architecture in a related technology provided by an embodiment of the utility model. Figure 1 As shown in the figure, the wireless charging architecture consists of a transmitter and a receiver. The receiver is set inside the electronic device, and the receiver uses a wireless charging receiver chip NU1651. During the wireless charging process, the electronic device first receives power through the receiving coil, and then passes through the wireless charging receiver chip NU1651; then, the wireless charging receiver chip NU1651 rectifies the AC voltage input by the receiving coil to obtain DC power VRECT; then, the wireless charging receiver chip NU1651 stabilizes the DC power VRECT through a low dropout linear regulator (LDO) to obtain a constant voltage output voltage VOUT.

[0037] Since the wireless charging receiving chip NU1651 adopts constant voltage output mode and cannot achieve constant current output, the output voltage VOUT needs to be converted into current by the charger chip to charge the battery. In other words, the wireless charging receiving chip NU1651 cannot directly charge the battery, has low flexibility when used, and needs to be used with a charger chip, resulting in a larger device area and higher cost for the electronic device.

[0038] The utility model is described in detail below in conjunction with specific embodiments.

[0039] Figure 2 This is a schematic diagram of the structure of a wireless charging receiving module provided by an embodiment of the utility model. Figure 2 As shown,

[0040] like Figure 2As shown, the wireless charging receiving module includes: an electric energy conversion unit; wherein,

[0041] When the working mode corresponding to the power conversion unit is the constant current output mode, the power conversion unit converts the input power into constant current electricity and outputs the constant current electricity.

[0042] According to some embodiments, constant current refers to a current whose magnitude and direction do not change.

[0043] In some embodiments, when the working mode corresponding to the power conversion unit is the constant current output mode, the wireless charging receiving module can directly charge the connected battery through the output constant current. Therefore, there is no need to set up a separate charging chip, which can reduce the area occupied by the electronic device and the cost of the electronic device.

[0044] Optionally, Figure 3 This is a schematic diagram of the structure of a wireless charging receiving module provided by an embodiment of the utility model. Figure 3 As shown, the wireless charging receiving module also includes a control unit; wherein,

[0045] The control unit is connected to the control end of the electric energy conversion unit.

[0046] According to some embodiments, the control unit can control the current value corresponding to the constant current, so the wireless charging receiving module can be suitable for charging a variety of different batteries.

[0047] In some embodiments, the control unit may be, for example, a digital control unit.

[0048] It should be noted that during the constant current charging process, the current value corresponding to the constant current is gradually increased by the control unit, and then the battery voltage gradually increases with the increase of the current value; when the battery voltage reaches the rated voltage, the current value is controlled by the control unit to start decreasing, and when the current value drops to zero, the charging is completed. This method is simple to operate, the control principle is simple, and it is easy to implement. The current value corresponding to the constant current is closer to the ideal optimal charging current curve, and the charging effect is good.

[0049] Optionally, when the working mode corresponding to the electric energy conversion unit is a constant voltage output mode, the electric energy conversion unit may convert the input electric energy into constant voltage electricity and output the constant voltage electricity.

[0050] According to some embodiments, constant voltage refers to a voltage that does not change in magnitude or direction.

[0051] It should be noted that constant voltage charging refers to charging the battery with constant voltage electricity. During constant voltage charging, as charging progresses, the charging current corresponding to the constant voltage electricity will change. In the early stage of charging, the charging current is large, and the battery is quickly replenished with energy; in the later stage of charging, the charging current slowly decreases. This method is closer to the charging characteristics of the battery and can obtain better charging performance. However, since the charging current is not controlled during constant voltage charging, it cannot adapt well to batteries in different states. Therefore, constant voltage charging is usually not used to charge the battery in electronic devices.

[0052] In some embodiments, a two-stage charging method can be used. In the early stage of charging, the control unit can control the working mode of the wireless charging receiving module to a constant current output mode to charge the battery with a constant current; when the battery voltage reaches the rated voltage, the control unit can control the working mode of the wireless charging receiving module to a constant voltage output mode to charge the battery with a constant voltage, thereby combining the advantages of the two charging methods to improve the charging effect.

[0053] Optionally, the electric energy conversion unit includes a current loop and a voltage loop; wherein,

[0054] When the current loop is in working state, the corresponding working mode of the power conversion unit is the constant current output mode;

[0055] When the voltage loop is in working state, the corresponding working mode of the power conversion unit is the constant voltage output mode.

[0056] According to some embodiments, the current loop refers to a current feedback system, which improves the stability of the output current by connecting the output current to the processing link in a positive feedback or negative feedback manner to output a constant current.

[0057] In some embodiments, the control unit is connected to the control end of the current loop for controlling the working state of the current loop and controlling the current value corresponding to the constant current output by the current loop when the current loop is in the working state.

[0058] According to some embodiments, the voltage loop refers to a voltage feedback system, which improves the stability of the output voltage by connecting the output voltage to the processing link in a positive feedback or negative feedback manner to output a constant voltage.

[0059] In some embodiments, the control unit is connected to the control end of the voltage loop to control the working state of the voltage loop and control the voltage value corresponding to the constant voltage output by the voltage loop when the voltage loop is in the working state.

[0060] Optionally, Figure 3 This is a schematic diagram of the structure of a wireless charging receiving module provided by an embodiment of the utility model. Figure 3As shown, the wireless charging receiving module also includes a rectifier unit; wherein,

[0061] The output end of the rectifier unit is connected to the input end of the power conversion unit. The rectifier unit converts the AC input power into DC power and outputs the DC power to the power conversion unit.

[0062] In some embodiments, Figure 3 As shown, the rectifier unit receives AC input power through the AC1 and AC2 pins, and outputs the rectified DC power to the power conversion unit through the positive output terminal, and can also output the DC power to the external circuit through the VRECT pin. The rectifier unit and the negative output terminal and the negative input terminal of the power conversion unit are grounded GND.

[0063] According to some embodiments, the rectifying unit may adopt a bridge rectifying circuit, for example.

[0064] In some embodiments, Figure 3 As shown, the control unit is connected to the control end of the rectifier unit and is used to control the working mode of the rectifier unit.

[0065] Alternatively, if Figure 3 As shown, the wireless charging receiving module also includes an LDO, and the input end of the LDO is connected to the positive output end of the rectifying unit.

[0066] In some embodiments, the LDO can, for example, convert the input direct current into a 5V constant voltage power and output it through the V5V pin of the wireless charging receiving module.

[0067] Alternatively, if Figure 3 As shown, the enable end of the power conversion unit is connected to the EN_B pin of the wireless charging receiving module, and the EN_B pin can be connected to a related control circuit in the electronic device to control the working state of the power conversion unit.

[0068] For example, when the EN_B pin receives a high-level signal, the power conversion unit may be in a working state, and the working mode of the power conversion unit may be controlled by the control unit. When the N_B pin receives a low-level signal, the power conversion unit may be in a non-working state, and at this time, the control unit cannot control the working mode of the power conversion unit.

[0069] Optionally, the wireless charging receiving module further includes a voltage conversion unit; wherein,

[0070] The input end of the voltage conversion unit is connected to the output end of the rectification unit, and the output end of the voltage conversion unit is connected to the input end of the electric energy conversion unit;

[0071] According to some embodiments, when the DC power output by the rectifier unit does not match the voltage range of the DC power that the power conversion unit can receive, the DC power output by the rectifier unit can be adjusted by the voltage conversion unit. That is, the voltage conversion unit can convert the voltage value corresponding to the DC power into a target voltage value, and input the DC power having the target voltage value into the power conversion unit.

[0072] In some embodiments, the target voltage value can be adjusted according to actual application scenarios.

[0073] In some embodiments, the control unit is connected to the control terminal of the voltage conversion unit and is used to adjust the working mode of the voltage conversion unit and set the target voltage value.

[0074] According to some embodiments, the voltage conversion unit may include, for example, a step-down voltage conversion circuit; wherein,

[0075] The input end of the step-down voltage conversion circuit is connected to the output end of the rectification unit, and the output end of the step-down voltage conversion circuit is connected to the input end of the electric energy conversion unit.

[0076] In some embodiments, the step-down voltage conversion circuit may be, for example, a direct current-direct current (DC-DC) buck circuit.

[0077] In some embodiments, Figure 4 This is a schematic diagram of the structure of a wireless charging receiving module provided by an embodiment of the utility model. Figure 4 As shown, the step-down voltage conversion circuit includes a first switch S1, a second switch S2 and an inductor L1; wherein,

[0078] The first end of the first switch S1 is connected to the positive output end of the rectifier unit, the second end of the first switch S1 is respectively connected to the first end of the second switch S2 and the first end of the inductor L1, the second end of the inductor L1 is connected to the positive input end of the power conversion unit, and the second end of the second switch S2 is respectively connected to the negative output end of the rectifier unit and the negative input end of the power conversion unit.

[0079] In some embodiments, the control unit is connected to the control end of the first switch S1 and the control end of the second switch S2, respectively, and is used to control the on and off states of the first switch S1 and the second switch S2, so as to control the working mode of the step-down voltage conversion circuit and set the target voltage value.

[0080] In some embodiments, Figure 4As shown, the switch types of the first switch S1 and the second switch can be N-type Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET).

[0081] Alternatively, if Figure 3 As shown, the wireless charging receiving module may also include a VRECT monitor; wherein,

[0082] The control unit is connected to the control end of the VRECT monitor and is used for controlling the working state of the VRECT monitor.

[0083] According to some embodiments, the output end of the VRECT monitor can be connected to the control end of the third switch S3, the first end of the third switch S3 is connected to the SINK pin of the wireless charging receiving module, and the second end of the third switch S3 is grounded. Thus, the working state of the VRECT monitor can be monitored through the SINK pin.

[0084] For example, when the VRECT monitor is in working state, the third switch S3 is in open state, and the SINK pin is in high level; when the VRECT monitor is in non-working state, the third switch S3 is in closed state, and the SINK pin is in low level.

[0085] Alternatively, if Figure 3 As shown, the wireless charging receiving module may also include an amplitude shift keying modulator (ASK Modulator). The amplitude shift keying modulator is a key device for implementing ASK modulation, which can convert digital signals into corresponding amplitude changes, thereby modulating the carrier signal.

[0086] In some embodiments, the input end of the amplitude keying modulator is connected to the control unit, the first output end of the amplitude keying modulator is connected to the control end of the fourth switch S4, the second output end of the amplitude keying modulator is connected to the control end of the fifth switch S5, the first end of the fourth switch S4 is connected to the COMM1 pin of the wireless charging receiving module, the first end of the fifth switch S5 is connected to the COMM2 pin of the wireless charging receiving module, and the second end of the fourth switch S4 and the second end of the fifth switch S5 are grounded. Thus, the amplitude keying modulator can convert the digital signal input by the control unit into a modulated digital signal and output it through the COMM1 pin and the COMM2 pin.

[0087] Alternatively, if Figure 3 As shown, the wireless charging receiving module also includes a communication unit; wherein,

[0088] The communication unit is connected to the SCL / ACR pin and the SDA / OS2 pin of the control unit and the wireless charging receiving module respectively, so that the control unit can receive the communication signal input by the SCL / ACR pin and the SDA / OS2 pin through the communication unit, and control the connected units including but not limited to the power conversion unit, the rectifier unit, the amplitude keying modulator, and the VRECT monitor according to the communication signal.

[0089] According to some embodiments, the communication unit may be, for example, an I2C slave device. The I2C slave device may communicate with the I2C master device via the SCL / ACR pin and the SDA / OS2 pin.

[0090] Alternatively, if Figure 3 As shown, the wireless charging receiving module also includes an analog-to-digital converter (ADC), the input end of the ADC is connected to the TEMP / VBAT pin of the wireless charging receiving module, and the output end of the ADC is connected to the control unit.

[0091] According to some embodiments, when the TEMP / VBAT pin is connected to the output end of the battery, the ADC can convert the battery voltage of the battery into a digital voltage signal, and input the digital signal to the power monitoring end of the control unit, so that the control unit controls the working mode of the power conversion unit according to the digital voltage signal.

[0092] Alternatively, if Figure 3 As shown, the wireless charging receiving module also includes a sixth switch S6; wherein,

[0093] A first end of the sixth switch S6 is connected to the INT_B / OS1 pin of the wireless charging receiving module, a second end of the sixth switch S6 is grounded, and a control end of the sixth switch S6 is connected to the control unit.

[0094] According to some embodiments, the control unit may be notified of an interruption via the INT_B / OS1 pin and the sixth switch S6. For example, when the INT_B / OS1 pin receives an interruption signal, the control unit may be in a non-operating state.

[0095] In summary, the wireless charging receiving module provided by the embodiment of the utility model can solve the problem that the existing wireless charging receiving chip cannot output constant current electricity by adding a constant current output to the wireless charging receiving module. Constant current electricity can be directly output to charge the battery, and there is no need to set up a separate charging chip, which can reduce the area occupied by the device of the electronic device and reduce the cost of the electronic device. At the same time, the current value corresponding to the constant current electricity can be adjusted to provide the battery with charging current at different stages, which can improve the charging effect.

[0096] According to an embodiment of the utility model, the utility model also provides an electronic device.

[0097] The electronic device comprises: a power module and a wireless charging receiving module as shown in any of the above embodiments; wherein:

[0098] The output end of the wireless charging receiving module is connected to the input end of the power module.

[0099] Optionally, the wireless charging receiving module includes a control unit; wherein,

[0100] The output terminal of the power module is connected to the power monitoring terminal of the control unit.

[0101] According to some embodiments, the power module may be, for example, a battery.

[0102] In summary, the electronic device provided by the embodiment of the utility model, by using the above-mentioned wireless charging receiving module, does not need to set up a separate charging chip, can reduce the area occupied by the components of the electronic device, and can reduce the cost of the electronic device.

[0103] In addition, the word "exemplary" is used herein to indicate serving as an example, instance, or diagram. Any aspect or design described as "exemplary" in this article is not necessarily understood to be advantageous compared to other aspects or designs. On the contrary, the use of the word exemplary is intended to present concepts in a specific way. As used herein, the term "or" is intended to represent an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to represent any one of the natural inclusive arrangements. That is, if X applies A; X applies B; or X applies both A and B, "X applies A or B" is satisfied under any of the aforementioned examples. In addition, unless otherwise specified or clearly pointed to a singular form from the context, the articles "one" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0104] Likewise, although the utility model has been shown and described with respect to one or more implementations, after reading and understanding the specification and drawings, those skilled in the art will think of equivalent variations and modifications. The utility model includes all such modifications and variations, and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise noted, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if the structure is not equivalent to the structure of the utility model. In addition, although the specific features of the utility model may have been described with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and conducive to any given or specific application. In addition, with respect to "including", "having", "having", "having", or variations thereof used in the specific embodiments or claims, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0105] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the invention of the present invention. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not applicable to the present invention. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0106] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A wireless charging receiving module, characterized in that: include: An electric energy conversion unit; wherein, When the working mode corresponding to the power conversion unit is the constant current output mode, the power conversion unit converts input power into constant current electricity and outputs the constant current electricity.

2. The wireless charging receiving module according to claim 1, characterized in that: When the working mode corresponding to the electric energy conversion unit is the constant voltage output mode, the electric energy conversion unit converts the input electric energy into constant voltage electricity and outputs the constant voltage electricity.

3. The wireless charging receiving module according to claim 2, characterized in that: The electric energy conversion unit includes a current loop and a voltage loop; wherein, When the current loop is in working state, the working mode corresponding to the electric energy conversion unit is a constant current output mode; When the voltage loop is in working state, the corresponding working mode of the electric energy conversion unit is a constant voltage output mode.

4. The wireless charging receiving module according to claim 1 or 2, characterized in that: The wireless charging receiving module also includes a control unit; wherein, The control unit is connected to the control end of the electric energy conversion unit.

5. The wireless charging receiving module according to claim 1, characterized in that: The wireless charging receiving module also includes a rectifier unit; wherein, The output end of the rectifying unit is connected to the input end of the power conversion unit, and the rectifying unit converts the AC input power into DC power and outputs the DC power to the power conversion unit.

6. The wireless charging receiving module according to claim 5, characterized in that: The wireless charging receiving module also includes a voltage conversion unit; wherein, The input end of the voltage conversion unit is connected to the output end of the rectification unit, and the output end of the voltage conversion unit is connected to the input end of the electric energy conversion unit; The voltage conversion unit converts a voltage value corresponding to the direct current into a target voltage value, and inputs the direct current having a voltage value of the target voltage value into the power conversion unit.

7. The wireless charging receiving module according to claim 6, characterized in that: The voltage conversion unit includes a step-down voltage conversion circuit; wherein, The input end of the step-down voltage conversion circuit is connected to the output end of the rectifier unit, and the output end of the step-down voltage conversion circuit is connected to the input end of the electric energy conversion unit.

8. The wireless charging receiving module according to claim 7, characterized in that: The step-down voltage conversion circuit includes a first switch, a second switch and an inductor; wherein, The first end of the first switch is connected to the positive output end of the rectifier unit, the second end of the first switch is respectively connected to the first end of the second switch and the first end of the inductor, the second end of the inductor is connected to the positive input end of the power conversion unit, and the second end of the second switch is respectively connected to the negative output end of the rectifier unit and the negative input end of the power conversion unit.

9. An electronic device, characterized in that: include: A power module and a wireless charging receiving module as claimed in any one of claims 1 to 8; wherein: The output end of the wireless charging receiving module is connected to the input end of the power supply module.

10. The electronic device according to claim 9, characterized in that: The wireless charging receiving module includes a control unit; wherein, The output end of the power module is connected to the power monitoring end of the control unit.

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