Wireless charging relay device and wireless charging relay method

Abstract

The embodiment of the invention discloses a wireless charging relay device and a wireless charging relay method, and the device comprises a signal collection module which is used for obtaining a working frequency signal of a wireless charging receiving end; the control module is electrically connected with the signal acquisition module; the change-over switch module is electrically connected with the control module; the resonant capacitor module is electrically connected with the change-over switch module; wherein the control module controls the conduction state of the change-over switch module according to a working frequency signal acquired by the signal acquisition module, and further controls the resonant capacitor module so as to switch the resonant capacitance between the wireless charging transmitting end and the wireless charging receiving end. According to the embodiment of the invention, the resonant capacitance between the wireless charging transmitting end and the wireless charging receiving end is switched by controlling the conduction state of the change-over switch module, so that the resonant capacitance value is changed, and adaptation to different charging standards is realized.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of wireless charging, and in particular to a wireless charging relay device and a wireless charging relay method. Background Art

[0002] With the rapid development and popularization of mobile electronic devices, wireless charging technology has become one of the important functions to enhance user experience. At present, various wireless charging standards are constantly being introduced in the market, and users have higher requirements for the convenience and compatibility of charging methods. In this context, wireless charging relay technology has gradually attracted attention. However, in actual use, when users use additional devices such as mobile phone card holders or airbag holders, it often affects the wireless charging function of the device, and there may also be a risk of damaging the card.

[0003] At present, there are solutions using relay coil technology on the market, which provide some ideas for solving the wireless charging distance problem. However, there are still the following shortcomings: it does not have the function of switching resonant capacitors; it cannot support new charging standards; the scope of application is small and it is difficult to meet the application needs of mobile device accessories. With the development of wireless charging technology, new charging standards continue to emerge, which puts forward new requirements for the performance and adaptability of relay devices. Especially in the field of mobile device accessories, the above shortcomings have become technical problems that need to be solved urgently. Summary of the invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide a wireless charging relay device and a wireless charging relay method, which can solve the technical problems in the prior art that multiple charging standards cannot be supported simultaneously and the resonant capacitor switching function is lacking.

[0005] In order to solve the above technical problems, a technical solution adopted in an embodiment of the present invention is: providing a wireless charging relay device, including: a wireless charging receiving end and a wireless charging transmitting end; a signal acquisition module, used to obtain the working frequency signal of the wireless charging receiving end; a control module, electrically connected to the signal acquisition module; a switching switch module, electrically connected to the control module; a resonant capacitor module, electrically connected to the switching switch module; wherein the control module controls the conduction state of the switching switch module according to the working frequency signal obtained by the signal acquisition module, so as to switch the resonant capacitor between the wireless charging transmitting end and the wireless charging receiving end.

[0006] In some embodiments, the wireless charging relay device further includes: a comparator module, electrically connected to the signal acquisition module, and configured to convert the operating frequency signal into a square wave signal and input it into the control module.

[0007] In some embodiments, the wireless charging relay device also includes: a rectifier module, used to convert the wireless charging signal into a direct current signal; a voltage stabilizing module, electrically connected to the rectifier module, used to provide working voltage for the signal acquisition module, the control module and the switching module.

[0008] In some embodiments, the signal acquisition module is further used to demodulate the communication signal sent by the wireless charging receiving end, and the control module controls the conduction state of the switching module according to the demodulated communication signal.

[0009] In some embodiments, the resonant capacitor module includes a plurality of capacitors with different capacitances, and switching of different capacitances is achieved through different conduction states of the switching switch module.

[0010] In order to solve the above technical problems, another technical solution adopted in the embodiment of the present invention is: providing a wireless charging relay method, including: obtaining an operating frequency signal of a wireless charging receiving end; converting the operating frequency signal into a square wave signal; controlling the conduction state of a switching switch module according to the frequency characteristics of the square wave signal; and switching the resonant capacitor by the conduction state of the switching switch module.

[0011] In some embodiments, the wireless charging relay method further includes: demodulating the communication signal sent by the wireless charging receiving end; and controlling the conduction state of the switching module according to the demodulated communication signal.

[0012] In some embodiments, the switching of the resonant capacitor includes selectively switching among a plurality of capacitors with different capacitance values ​​to adapt to different wireless charging standards.

[0013] In some embodiments, the wireless charging relay method further includes:

[0014] Convert the wireless charging signal into a DC signal;

[0015] The DC signal is subjected to voltage stabilization processing to provide operating voltage for signal acquisition, control and switching operations.

[0016] In some embodiments, the corresponding resonant capacitor is automatically switched according to the frequency range of the operating frequency signal, wherein the frequency range includes 87-205 KHz and 360 KHz.

[0017] The beneficial effects of the embodiments of the present invention are as follows: Different from the prior art, the embodiments of the present invention control the conduction state of the switching switch module to switch the resonant capacitor between the wireless charging transmitter and the wireless charging receiver to change the capacitance value, thereby achieving adaptation to different charging standards. At the same time, it also expands the application scope of the wireless charging relay device and improves the compatibility of the wireless charging relay device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a wireless charging relay device provided by an embodiment of the present invention;

[0019] Figure 2 is a circuit schematic diagram of a switching switch module and a resonant capacitor module provided in an embodiment of the present invention;

[0020] Figure 3 is a structural schematic diagram of a second wireless charging relay device provided in an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a third wireless charging relay device provided in an embodiment of the present invention;

[0022] Figure 5 It is a flow chart of a wireless charging relay method provided by an embodiment of the present invention;

[0023] Figure 6 It is a flow chart of another wireless charging relay method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "bottom" and the like used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0026] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] Based on an in-depth analysis of the prior art and full consideration of practical application requirements, the present invention provides an innovative technical solution. This solution achieves intelligent adaptation to different charging standards through ingenious structural design and control strategy. The technical solution of the present invention will be described in detail below in conjunction with specific implementation methods.

[0028] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0029] In some embodiments of the present application, the present invention provides a wireless charging relay device, the structural diagram of which is as follows: Figure 1 As shown, it specifically includes a wireless charging receiving end RX Coil, a wireless charging transmitting end TX Coil, a signal acquisition module 10, a control module 20, a switching module 30 and a resonant capacitor module 40.

[0030] Among them, the input end of the signal acquisition module 10 is connected to the two ends of the wireless charging receiving end RX Coil, the output end of the signal acquisition module 10 is connected to the input end of the control module 20, the output end of the control module 20 is connected to the input end of the switching module 30, the output end of the switching switch module 30 is connected to the input end of the resonant capacitor module 40, and the resonant capacitor module 40 is connected between the wireless charging transmitting end TX Coil and the wireless charging receiving end RX Coil.

[0031] The wireless charging receiving end RX Coil is used to receive the electrical signal sent by the external device, and the signal acquisition module 10 is used to obtain the working frequency signal sent by the wireless charging receiving end. Specifically, the signal acquisition module 10 can obtain the working frequency signal by coil induction, or it can be sampled and acquired by a dedicated signal detection circuit. In this embodiment, the signal acquisition module 10 preferably adopts a combination of a sampling coil and a signal conditioning circuit, wherein the sampling coil is used to sense the electromagnetic field signal of the wireless charging receiving end, and the signal conditioning circuit amplifies and filters the sampled signal to obtain a stable and reliable working frequency signal.

[0032] The design of the above modules not only takes into account the requirements of functional realization, but also fully considers various factors in practical applications, such as cost, reliability, stability, etc. Through optimized design and reasonable configuration, the entire wireless charging relay device can work efficiently and stably.

[0033] As an example but not a limitation, the design of the sampling coil follows the following principles: the sampling coil adopts a multi-layer PCB stacking design to optimize the number of coil turns and size; the inner and outer diameter ratio of the sampling coil is controlled within the range of 2.5:1 to 3:1; the quality factor Q value of the sampling coil at the key frequency point (87KHz, 205KHz, 360KHz) is ≥30; the sampling coil is wound with Litz wire to reduce high-frequency loss. The design of the signal conditioning circuit follows the following principles: the front stage of the signal conditioning circuit adopts a differential amplifier to improve the common mode rejection ratio; the center frequency of the bandpass filter of the signal conditioning circuit is adjustable, and the bandwidth covers 100-400KHz; the signal conditioning circuit adopts a programmable gain amplifier (PGA) to achieve 0-60dB adjustable gain; the total harmonic distortion (THD) of the signal conditioning circuit is controlled below 0.1%. The selection of the above parameters is the result of in-depth research and repeated verification, and fully considers various situations that may be encountered in the actual application environment. While ensuring performance, appropriate margins are also reserved to improve the reliability and stability of the device.

[0034] The control module 20 is electrically connected to the signal acquisition module 10 for receiving and processing the operating frequency signal. In this embodiment, the control module 20 can be implemented by a single-chip microcomputer or a dedicated control chip. The control module 20 generates a corresponding control signal according to the received operating frequency signal to control the conduction state of the switching switch module 30. Specifically, the control module 20 can output different control signals according to different operating frequency ranges, thereby realizing automatic recognition and adaptation of different charging standards.

[0035] The switching module 30 is electrically connected to the control module 20 and is used to change its conduction state according to the control signal of the control module 20. In this embodiment, the switching module 30 can be implemented by a multi-channel analog switch or a relay array. Each switch unit can be independently controlled to achieve combined switching of different capacitors.

[0036] The resonant capacitor module 40 is electrically connected to the switching module 30 and includes a plurality of capacitor units with different capacitance values. These capacitor units can realize a variety of capacitance configurations by switching different conduction combinations of the switching module 30. Specifically, the capacitors in the resonant capacitor module 40 may include but are not limited to:

[0037] Resonant capacitors for the frequency range of 87-205KHz;

[0038] Resonant capacitor for 360KHz frequency.

[0039] The control strategy of the wireless charging relay device adopts a modular design concept, which not only ensures the independence of each function, but also realizes the effective coordination between modules. Through reasonable control, the device can respond quickly and accurately switch to the appropriate working state.

[0040] In practical applications, the working process of the wireless charging relay device of this embodiment is as follows:

[0041] When the wireless charging receiving end RX Coil starts working, the signal acquisition module 10 obtains the working frequency signal by induction; the control module 20 analyzes the frequency characteristics of the working frequency signal to determine the current charging standard type; according to the identified charging standard, the control module 20 outputs a corresponding control signal to the switching module 30; the switching switch module 30 changes the conduction state according to the control signal to realize the switching combination of different capacitors in the resonant capacitor module 40; after completing the capacitor switching, the wireless charging relay device can work normally according to the corresponding charging standard.

[0042] In another embodiment, the signal acquisition module 10 also has a communication signal demodulation function. Specifically, the signal acquisition module 10 can extract and demodulate the communication signal sent by the wireless charging receiving end from the working frequency signal, such as the charging protocol version, power level and other information. The control module 20 can more accurately control the conduction state of the switching switch module 30 based on these demodulated communication signals to achieve more intelligent charging process control.

[0043] It should be noted that the capacitors in the resonant capacitor module 40 can be configured according to actual application requirements. For example, it can include: 1 reference capacitor for realizing basic resonant function; 2-3 switchable capacitors for realizing adaptation of different charging standards; and several fine-tuning capacitors for realizing finer resonant frequency adjustment.

[0044] This modular capacitor configuration method can flexibly respond to different charging scenario requirements. At the same time, the control module 20 can also achieve adaptive optimization through software algorithms to ensure stable and reliable operation of the system while ensuring charging efficiency.

[0045] In a specific application scenario of this embodiment, the wireless charging relay device can be integrated into a mobile phone protective case or a card holder. When the user needs to perform wireless charging while using a protective case or placing a card, the device can automatically identify the working standard of the charger and adapt it, effectively solving the problem of decreased charging efficiency caused by increased charging distance.

[0046] In order to further improve the charging efficiency, the resonant capacitor module 40 in this embodiment adopts low-loss capacitors, and minimizes the influence of stray capacitance by optimizing the capacitor layout and routing design. At the same time, the switching switch module 30 adopts a switching device with low on-resistance to reduce power loss.

[0047] like Figure 2As shown, the resonant capacitor module 40 includes a reference capacitor C0 and n switchable capacitors (resonant capacitor C1, resonant capacitor C2, ... and resonant capacitor Cn), and the switching switch module 30 includes n pairs of switch tubes (switch tube Q1A and switch tube Q1B, switch tube Q2A and switch tube Q2B, ... and switch tube QnA and switch tube QnB).

[0048] Among them, the reference capacitor C0 is connected between the wireless charging transmitter TX Coil and the wireless charging receiver RX Coil; after the switch tube Q1A and the switch tube Q1B are connected back to back, they are connected in series with the resonant capacitor C1 to form a series branch; after the switch tube Q2A and the switch tube Q2B are connected back to back, they are connected in series with the resonant capacitor C2 to form a series branch, ..., after the switch tube QnA and the switch tube QnB are connected back to back, they are connected in series with the resonant capacitor Cn to form a series branch, and n series branches are connected in parallel at both ends of the reference capacitor C0. The control switch 20 can control the conduction or disconnection of any pair of switch tubes to connect the corresponding resonant capacitor in parallel at both ends of the reference capacitor C0 or remove it, so as to adjust the resonant capacitance value between the wireless charging transmitter TX Coil and the wireless charging receiver RX Coil, thereby achieving the purpose of switching capacitors.

[0049] In some other embodiments of the present application, a second wireless charging relay device is provided, and its structural diagram is as follows: Figure 3 As shown, compared to Figure 1 The wireless charging relay device shown in the figure, the wireless charging relay device of this embodiment also includes a comparator module 50. The input end of the comparator module 50 is electrically connected to the output end of the signal acquisition module 10, and the output end of the comparator module 50 is connected to the input end of the control module 20. The comparator module 50 is used to convert the collected working frequency signal into a square wave signal. This conversion can improve the reliability and accuracy of subsequent signal processing. Specifically, the comparator module 50 can be implemented using a high-speed comparator chip, and the analog signal is converted into a stable digital square wave signal by setting a suitable comparison threshold.

[0050] The connection methods of other modules are the same as the functional description. Figure 1 The illustrated implementation manner is not described in detail here. In practical applications, the working process of the wireless charging relay device of the present invention is as follows:

[0051] When the wireless charging receiving end starts working, the signal acquisition module 10 obtains the working frequency signal by induction; the comparator module 50 converts the collected signal into a square wave signal and inputs it to the control module 20; the control module 20 analyzes the frequency characteristics of the square wave signal to determine the current charging standard type; according to the identified charging standard, the control module 20 outputs a corresponding control signal to the switching switch module 30; the switching switch module 30 changes the conduction state according to the control signal to realize the switching combination of different capacitors in the resonant capacitor module 40; after completing the capacitor switching, the wireless charging relay device can work normally according to the corresponding charging standard.

[0052] In some other embodiments of the present application, another wireless charging relay device is provided, and its structural diagram is as follows: Figure 4 As shown, compared to Figure 3 The wireless charging relay device shown in the figure, the wireless charging relay device of this embodiment further includes a rectifying module 60 and a voltage stabilizing module 70 .

[0053] Among them, the input end of the rectifier module 60 is connected to the two ends of the wireless charging transmitter TX Coil, the output end of the rectifier module 60 is connected to the input end of the voltage regulator module 70, and the output end of the voltage regulator module 70 is respectively connected to the signal acquisition module 10, the control module 20 and the switching module 30.

[0054] Specifically, the rectifier module 60 is used to convert the sensed wireless charging signal into a direct current signal. In this embodiment, the rectifier module 60 can be implemented by a full-bridge rectifier circuit to ensure that the alternating current signal can be efficiently converted into a direct current signal.

[0055] The voltage stabilizing module 70 is used to convert the rectified DC signal into a stable working voltage, and provide a reliable power supply for the signal acquisition module 10, the control module 20, and the switching module 30. In this embodiment, the voltage stabilizing module 70 can be implemented by a low voltage drop linear regulator or a switching regulator, which can be selected according to the system power consumption and space requirements.

[0056] In practical applications, the working process of the wireless charging relay device of the present invention is as follows:

[0057] When the wireless charging receiving end starts working, the signal acquisition module 10 obtains the working frequency signal by induction; the comparator module 50 converts the collected signal into a square wave signal and inputs it to the control module 20; the control module 20 analyzes the frequency characteristics of the square wave signal to determine the current charging standard type; according to the identified charging standard, the control module 20 outputs a corresponding control signal to the switching switch module 30; the switching switch module 30 changes the conduction state according to the control signal to realize the switching combination of different capacitors in the resonant capacitor module 40; after completing the capacitor switching, the wireless charging relay device can work normally according to the corresponding charging standard.

[0058] Through the implementation of the above technical solutions, the present invention not only solves the problems existing in the prior art, but also achieves performance improvements in many aspects. Specifically, the present invention has the following significant technical effects: by adding a capacitor switching function to the wireless charging relay device, automatic adaptation to different charging standards is achieved. Specifically: by using signal acquisition and automatic identification technology, the current charging standard can be accurately identified; through a programmable control module, intelligent capacitor switching control is achieved; a modular design is adopted, which has good scalability and compatibility; combined with the communication signal demodulation function, more precise charging process control is achieved.

[0059] In some embodiments of the present application, based on the wireless charging relay device provided in the above embodiments, a wireless charging relay method is provided, and its flow chart is as follows: Figure 5 As shown, the specific steps include the following:

[0060] Step S100: Acquire the operating frequency signal of the wireless charging receiving end.

[0061] The specific implementation can be achieved through the following methods:

[0062] Specifically, the operating frequency signal can be obtained by sampling coil induction. As an example and not a limitation, the sampling coil is designed to effectively sense electromagnetic signals in the 87-205KHz and 360KHz frequency bands to ensure that signals of different charging standards can be accurately collected. The collected signal is processed by signal conditioning such as amplification and filtering to improve the signal-to-noise ratio and stability of the signal. Finally, the amplified and filtered signal is passed through the signal conditioning circuit to obtain a stable operating frequency signal.

[0063] Step S200: converting the operating frequency signal into a square wave signal.

[0064] This step is achieved through the comparator circuit, which includes: setting a suitable comparison threshold to convert the analog signal into a square wave signal with clear high and low levels; de-jittering the square wave signal to eliminate possible interference and glitches; and outputting a stable digital square wave signal for subsequent processing. This conversion not only simplifies the subsequent signal processing process, but also improves the accuracy of frequency detection.

[0065] As an example but not a limitation, the design of the comparator circuit follows the following principles: a high-speed comparator is used with a propagation delay of <100ns; the hysteresis voltage window is ±10mV to suppress signal jitter; the comparison reference voltage can be dynamically adjusted through the DAC output; the output end uses a Schmitt trigger for shaping. The corresponding de-jitter processing follows the following principles: hardware filtering is performed through RC low-pass filtering, and the cutoff frequency is set to 500KHz; software filtering is implemented using a 3-point median filter algorithm; edge detection is implemented using a double-edge trigger method; and timing constraints include setup time >100ns and hold time >50ns.

[0066] Step S300: controlling the conduction state of the switch module according to the frequency characteristics of the square wave signal.

[0067] This step includes: detecting the frequency of the square wave signal and determining the frequency range to which it belongs; determining the current charging standard type according to the frequency range; generating a corresponding control signal sequence; and sending the control signal to the switching module. For example, when a signal in the range of 87-205KHz is detected, a switch control signal corresponding to the first charging standard is output; when a 360KHz signal is detected, a control signal suitable for the second charging standard is output.

[0068] Step S600: switching the resonant capacitor by switching the conduction state of the switch module.

[0069] In specific implementation: the switching switch module changes its conduction state according to the received control signal; the selective switching of the resonant capacitor is realized through different switch combinations; during the switching process, the switching of the capacitor is ensured to be smooth to avoid generating large transient interference.

[0070] Taking the process of switching from the first charging standard to the second charging standard as an example, the specific execution process is as follows:

[0071] When the frequency is detected to change from 87-205KHz to 360KHz, the control module generates a new switch control signal, disconnects the original capacitor combination in sequence according to the predetermined timing, establishes a new capacitor connection relationship, verifies the system working status, and completes the standard switch.

[0072] In some other embodiments of the present application, a second wireless charging relay method is also provided, and its flow chart is as follows: Figure 6 As shown, the specific steps include the following:

[0073] Step S100: Acquire the operating frequency signal of the wireless charging receiving end.

[0074] The specific implementation can be achieved through the following methods:

[0075] Specifically, the operating frequency signal can be obtained by sampling coil induction. As an example and not a limitation, the sampling coil is designed to effectively sense electromagnetic signals in the 87-205KHz and 360KHz frequency bands to ensure that signals of different charging standards can be accurately collected. The collected signal is processed by signal conditioning such as amplification and filtering to improve the signal-to-noise ratio and stability of the signal. Finally, the amplified and filtered signal is passed through the signal conditioning circuit to obtain a stable operating frequency signal.

[0076] Step S200: converting the operating frequency signal into a square wave signal.

[0077] This step is achieved through the comparator circuit, which includes: setting a suitable comparison threshold to convert the analog signal into a square wave signal with clear high and low levels; de-jittering the square wave signal to eliminate possible interference and glitches; and outputting a stable digital square wave signal for subsequent processing. This conversion not only simplifies the subsequent signal processing process, but also improves the accuracy of frequency detection.

[0078] As an example but not a limitation, the design of the comparator circuit follows the following principles: a high-speed comparator is used with a propagation delay of <100ns; the hysteresis voltage window is ±10mV to suppress signal jitter; the comparison reference voltage can be dynamically adjusted through the DAC output; the output end uses a Schmitt trigger for shaping. The corresponding de-jitter processing follows the following principles: hardware filtering is performed through RC low-pass filtering, and the cutoff frequency is set to 500KHz; software filtering is implemented using a 3-point median filter algorithm; edge detection is implemented using a double-edge trigger method; and timing constraints include setup time >100ns and hold time >50ns.

[0079] Step S400: demodulating the communication signal sent by the wireless charging receiving end.

[0080] Extract modulation information from the working frequency signal and demodulate the communication data sent by the wireless charging receiver. Specifically, it includes charging protocol version, power level, identity recognition and other information; perform protocol analysis on the demodulated communication signal to extract effective control information. This step needs to support communication protocols of multiple charging standards to ensure the accuracy of information analysis.

[0081] Step S500: controlling the conduction state of the switching module according to the demodulated communication signal.

[0082] Based on the information obtained from the analysis and the current working state, the control strategy of the switching module can be dynamically adjusted. For example, the optimal resonant capacitor combination can be selected according to the charging power level, or the working mode can be adjusted according to the temperature information.

[0083] Step S600: switching the resonant capacitor by switching the conduction state of the switch module.

[0084] In specific implementation: the switching switch module changes its conduction state according to the received control signal; the selective switching of the resonant capacitor is realized through different switch combinations; during the switching process, the switching of the capacitor is ensured to be smooth to avoid generating large transient interference.

[0085] Taking the process of switching from the first charging standard to the second charging standard as an example, the specific execution process is as follows:

[0086] When the frequency is detected to change from 87-205KHz to 360KHz, the control module generates a new switch control signal, disconnects the original capacitor combination in sequence according to the predetermined timing, establishes a new capacitor connection relationship, verifies the system working status, and completes the standard switch.

[0087] In some other embodiments of the application, the wireless charging relay method may further include the following optimization steps:

[0088] Convert wireless charging signals into DC signals.

[0089] Specifically, it includes: obtaining energy from the wireless charging signal through the induction coil, and using a full-bridge rectifier circuit to convert the AC signal into a DC signal. As an example but not a limitation, the rectifier circuit uses a low-voltage drop Schottky diode to improve efficiency.

[0090] The DC signal is stabilized to provide working voltage for signal acquisition, control and switching operations.

[0091] The rectified DC voltage is stabilized to provide a stable working power supply for each module of the system. It should be noted that the voltage stabilization circuit can select a suitable voltage stabilization scheme according to the actual power consumption to achieve a balance between efficiency and stability.

[0092] Different from the prior art, the implementation mode of the present invention controls the conduction state of the switching switch module, thereby switching the resonant capacitor between the wireless charging transmitter and the wireless charging receiver to change the capacitance value, thereby achieving adaptation to different charging standards. At the same time, it also expands the application scope of the wireless charging relay device and improves the compatibility of the wireless charging relay device.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present application as above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wireless charging relay device, characterized in that: include: Wireless charging receiver and wireless charging transmitter; A signal acquisition module, used to obtain the working frequency signal of the wireless charging receiving end; A control module, electrically connected to the signal acquisition module; A switching switch module, electrically connected to the control module; A resonant capacitor module, electrically connected to the switching module; Among them, the control module controls the conduction state of the switching module according to the working frequency signal obtained by the signal acquisition module, and then controls the resonant capacitor module to switch the resonant capacitor between the wireless charging transmitting end and the wireless charging receiving end.

2. The wireless charging relay device according to claim 1, characterized in that: Also includes: The comparator module is electrically connected to the signal acquisition module and is used to convert the operating frequency signal into a square wave signal and input it into the control module.

3. The wireless charging relay device according to claim 1, characterized in that: Also includes: A rectifier module, used to convert the wireless charging signal into a direct current signal; The voltage stabilizing module is electrically connected to the rectifier module and is used to provide working voltage for the signal acquisition module, the control module and the switching module.

4. The wireless charging relay device according to claim 1, characterized in that: The signal acquisition module is also used to demodulate the communication signal sent by the wireless charging receiving end, and the control module controls the conduction state of the switching module according to the demodulated communication signal.

5. The wireless charging relay device according to claim 1, characterized in that: The resonant capacitor module includes a plurality of capacitors with different capacitance values, and switching of different capacitance values ​​is achieved through different conduction states of the switching switch module.

6. A wireless charging relay method, characterized in that: include: Obtain the working frequency signal of the wireless charging receiving end; Converting the operating frequency signal into a square wave signal; Controlling the conduction state of the switching switch module according to the frequency characteristics of the square wave signal; The resonant capacitor is switched by changing the conduction state of the switch module.

7. The wireless charging relay method according to claim 6, characterized in that: Also includes: Demodulating the communication signal sent by the wireless charging receiving end; The conduction state of the switching module is controlled according to the demodulated communication signal.

8. The wireless charging relay method according to claim 6, characterized in that: The switching of the resonant capacitor includes selectively switching among a plurality of capacitors with different capacitance values ​​to adapt to different wireless charging standards.

9. The wireless charging relay method according to claim 6, characterized in that: Also includes: Convert the wireless charging signal into a DC signal; The DC signal is subjected to voltage stabilization processing to provide operating voltage for signal acquisition, control and switching operations.

10. The wireless charging relay method according to claim 6, characterized in that: The corresponding resonant capacitor is automatically switched according to the frequency range of the operating frequency signal, wherein the frequency range includes 87-205KHz and 360KHz.

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