CN113972703A

CN113972703A - Wireless charging method, device, terminal and storage medium

Info

Publication number: CN113972703A
Application number: CN202010706519.7A
Authority: CN
Inventors: 王彦腾; 孙长宇
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2022-01-25

Abstract

The disclosure relates to a charging device and a charging method, which are applied to a first terminal, wherein the wireless charging device comprises: a charging circuit and a quality factor Q value detection module; wherein the charging circuit comprises: a coil; and the Q value detection module is connected with the coil and used for determining the Q value by detecting the discharge parameters on the coil when the charging circuit transmits the wireless signals. In the Q value detection of the embodiment of the disclosure, the Q value is determined by directly detecting the discharge parameter data on the coil through the Q value detection module connected with the coil, and the inductive reactance of different coils or the impedance of other objects on the wireless charging device and the like do not need to be considered, so that the Q value can be accurately detected; and, because the accuracy of detecting the Q value is improved, the accuracy of detecting the foreign matters can also be improved, for example, the situation that the foreign matters exist actually but the foreign matters exist are not detected due to inaccurate detection of the Q value is greatly reduced, so that the safety of wireless charging is improved.

Description

Wireless charging method, device, terminal and storage medium

Technical Field

The present disclosure relates to the field of wireless charging technologies, and in particular, to a wireless charging method, an apparatus, a terminal, and a storage medium.

Background

With the efforts of wireless charging technology vendors and coil vendors, more and more smart devices, including many wearable devices and mobile smart terminals, start to apply wireless charging technology. In terms of the market, the Wireless Power Consortium (WPC) has been widely used.

When the intelligent equipment is wirelessly charged, the intelligent equipment also supports a wireless reverse charging technology; for example, a cell phone is used for wireless charging, but the cell phone can also be wirelessly charged with other smart devices such as watches, headsets, etc. When reverse charging is carried out, if metal foreign matters exist between the transmitting end and the receiving end, great potential safety hazards exist.

Disclosure of Invention

The disclosure provides a charging method, a charging device, a terminal and a storage medium.

According to a first aspect of the embodiments of the present disclosure, there is provided a wireless charging device applied to a first terminal, the wireless charging device including: a charging circuit and a quality factor Q value detection module; wherein the content of the first and second substances,

the charging circuit includes: a coil;

and the Q value detection module is connected with the coil and used for determining the Q value by detecting the discharge parameters on the coil when the charging circuit transmits the wireless signals.

In the above-mentioned scheme, the Q value detection module includes:

the detection circuit is connected with the coil and used for detecting the discharge parameters when the coil transmits wireless signals;

and the conversion circuit is connected with the output end of the detection circuit and is used for determining the Q value according to the discharge parameter.

In the foregoing solution, in some embodiments, the detection circuit includes:

at least one switching tube; wherein the switching tube is connected with the coil;

the control module is further connected with the switching tube and used for sending a first control signal to the switching tube to control the switching tube to be switched on or sending a second control signal to the switching tube to control the switching tube to be switched off;

the Q value detection module is used for detecting the discharge parameter of the wireless signal transmitted by the coil when the switching tube is turned off after the working state is entered, and determining the Q value; or when the switch tube is conducted, stopping detecting the discharge parameters of the coil.

In the above solution, the wireless charging device further includes:

the control module is connected with the Q value detection module and used for sending an enabling signal for enabling the Q value detection module;

and the Q value detection module is used for entering a working state of detecting the Q value under the enabling of the enabling signal.

In the above scheme, the detection circuit is configured to determine a first Q value by detecting a discharge parameter on the coil when the charging circuit transmits the first pulse signal;

the control module is connected with the output end of the conversion circuit and used for determining whether foreign matters disturbing wireless charging exist in a preset range of the first terminal or not based on the first Q value and a preset threshold value.

In the above solution, the detection circuit is configured to determine a second Q value by detecting a discharge parameter on the coil when the charging circuit transmits the second pulse signal;

the device, still include:

the communication module is used for receiving a reference Q value returned by the second terminal based on the second pulse signal;

the control module is connected with the communication module and used for determining whether foreign matters disturbing wireless charging exist between the first terminal and the second terminal or not based on the second Q value and the reference Q value.

According to a second aspect of the present disclosure, there is provided a wireless charging processing method applied to a first terminal, where the first terminal includes a charging circuit and a quality factor Q value detection module, and the charging circuit includes: a coil; the method comprises the following steps:

acquiring a Q value obtained by detecting a discharge parameter on the coil by the Q value detection module when the charging circuit sends a wireless signal;

and determining whether foreign matters which interfere wireless charging exist in a preset range of the first terminal according to the Q value.

In the above scheme, the method further comprises:

generating an enabling signal for enabling the Q value detection module; the enabling signal is used for triggering the Q value detection module to enter a working state of detecting the Q value.

In the above scheme, the obtaining a Q value obtained by the Q value detection module detecting a discharge parameter on the coil when the charging circuit sends the wireless signal includes:

acquiring a first voltage of the coil at a first moment and a second voltage of the coil at a second moment;

obtaining an impedance ratio of an inductance of the coil to a resistance on the coil based on the first voltage, the second voltage, and a time interval between the second time and the first time;

and obtaining the Q value based on the impedance ratio and the working frequency of the coil.

acquiring a first Q value obtained by detecting a discharge parameter on the coil by the Q value detection module when the charging circuit sends a first pulse signal;

the determining whether foreign matters interfering with wireless charging exist in a predetermined range of the first terminal according to the Q value comprises the following steps:

and determining whether foreign matters which interfere with wireless charging exist in a preset range of the first terminal or not based on the first Q value and a preset threshold value.

In the foregoing solution, the determining whether a foreign object interfering with wireless charging exists in a predetermined range of the first terminal based on the first Q value and a predetermined threshold includes:

if the first Q value is smaller than or equal to the threshold value, determining that foreign matters which interfere wireless charging exist in a preset range of the first terminal;

alternatively, the first and second electrodes may be,

and if the first Q value is larger than the threshold value, determining that no foreign matter interfering wireless charging exists in the preset range of the first terminal.

In the above scheme, the method further comprises:

in response to the fact that foreign matters which interfere with wireless charging do not exist in a preset range of the first terminal, controlling the charging circuit to transmit a second pulse signal;

the second pulse signal is used for waking up the second terminal, and the period of the second pulse signal is greater than that of the first pulse signal.

acquiring a second Q value obtained by detecting a discharge parameter on the coil by the Q value detection module when the charging circuit sends a second pulse signal;

the method further comprises the following steps:

receiving a reference Q value returned by the second terminal based on the second pulse signal;

determining whether foreign matter that interferes with wireless charging exists between the first terminal and the second terminal based on the second Q value and the reference Q value.

In the foregoing solution, the determining whether a foreign object that interferes with wireless charging exists between the first terminal and the second terminal based on the second Q value and the reference Q value includes:

if the second Q value is larger than or equal to the reference Q value of the preset multiple, determining that no foreign matter interfering wireless charging exists between the first terminal and the second terminal;

alternatively, the first and second electrodes may be,

and if the second Q value is smaller than the reference Q value of the preset multiple, determining that a foreign matter which interferes wireless charging exists between the first terminal and the second terminal.

In the above scheme, the method further comprises:

generating a disable signal; the de-enable signal is used for triggering the Q value detection module to exit from the working state of detecting the Q value.

In the above scheme, the method further comprises:

if the reference Q value sent by the second terminal is not received within the preset time, the sending power of the first terminal and the receiving power of the second terminal are obtained;

determining whether a foreign object interfering with wireless charging exists between the first terminal and the second terminal based on a difference between the transmission power and the reception power.

According to a third aspect of the embodiments of the present disclosure, there is provided a terminal, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: when the executable instructions are executed, the wireless charging processing method according to any embodiment of the disclosure is implemented.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium storing an executable program, wherein the executable program, when executed by a processor, implements the wireless charging processing method of any of the embodiments of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

in an embodiment of the present disclosure, there is provided a wireless charging device including: a charging circuit and a quality factor Q value detection module; wherein the charging circuit comprises: a coil; and the Q value detection module is connected with the coil and used for determining the Q value by detecting the discharge parameters on the coil when the charging circuit transmits the wireless signals. In this way, since the Q value detection of the embodiment of the present disclosure directly detects the charging parameter on the coil to determine the Q value through the Q value detection module connected to the coil, it is not necessary to consider the inductive reactance of different coils or the impedance of other objects on the wireless charging device, and thus the Q value can be accurately detected. In addition, the accuracy of detecting the Q value is improved, the accuracy of detecting the foreign matters can also be improved, and the situation that the foreign matters exist actually but are not detected due to inaccurate detection of the Q value is greatly reduced, so that the safety of wireless charging is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic diagram of a power loss based detection of foreign objects.

Fig. 2 is an exemplary diagram illustrating a wireless charging device in accordance with one exemplary embodiment.

Fig. 3 is a block diagram illustrating a wireless charging device according to an example embodiment.

Fig. 4 is a block diagram illustrating a wireless charging device according to an example embodiment.

FIG. 5 is an exemplary diagram illustrating a discharge parameter waveform according to an exemplary embodiment.

Fig. 6 is a block diagram illustrating a wireless charging device according to an example embodiment.

Fig. 7 is a flow chart illustrating a wireless charging method according to an example embodiment.

Fig. 8 is a flow chart illustrating a wireless charging method according to an example embodiment.

Fig. 9 is a flow chart illustrating a wireless charging method according to an example embodiment.

Fig. 10 is a flow chart illustrating a wireless charging method according to an example embodiment.

Fig. 11 is a flow chart illustrating a wireless charging method according to an example embodiment.

Fig. 12 is a schematic diagram of a user interface according to one embodiment that includes a shortcut key for wireless reverse charging.

Fig. 13 is a flow chart illustrating a terminal including a wireless charging device according to an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

As shown in fig. 1, disclosed is a method for detecting a foreign object based on power loss, including: obtaining transmitting power P of transmitting terminal of wireless charging device_PTAnd the receiving power P of the receiving end of the wireless charging device_PR(ii) a Based on the P_PTAnd P_PRThe difference value of (a) determines whether a foreign object that interferes with wireless charging exists between the transmitting end of the wireless charging device and the receiving end of the wireless charging device. For example, if-500 mW<P_PT-P_PR<0mW, determining that no foreign matter exists; if P_PT-P_PRAnd determining that the foreign matter exists at-500 mW.

However, in the method for detecting the foreign object based on the power loss, on one hand, different parameters are required for detecting the foreign object due to different coils of different receiving ends, different coil surrounding environments, different coupling of the coils of the transmitting end and the receiving end, different positions of the coils of the transmitting end and the receiving end, different load currents and the like, so that the detection difficulty is increased; on the other hand, the power loss P exists between the receiving end and the transmitting end_lossFor example, the coil has power loss, the rectifier circuit has power loss, and the transmission power at the transmitting end and the reception power at the receiving end need to be supplemented, which may also cause inaccuracy in detection of the foreign object.

Based on this, the embodiment of the present disclosure provides a method for detecting a Q value based on a Q value detection module, where the method directly detects a discharge parameter on a coil at a transmitting end, determines the Q value based on the discharge parameter, and does not need to consider the reasons of different coils at different receiving ends, power loss, and the like; so that an accurate Q value can be determined. And based on the determined Q value, whether foreign matters exist in the preset range of the sending end or not or whether foreign matters exist between the receiving end and the sending end or not is determined, so that the accuracy of determining whether the foreign matters exist or not can be greatly improved, and the misjudgment of whether the foreign matters exist or not is greatly reduced.

As shown in fig. 2, an embodiment of the present disclosure provides a wireless charging device, including:

a charging circuit 11 and a quality factor Q value detection module 12; wherein the content of the first and second substances,

the charging circuit includes: a coil 111;

the Q value detection module 12 is connected to the coil 111, and configured to determine a Q value by detecting a discharge parameter on the coil 111 when the charging circuit 11 transmits a wireless signal.

The wireless charging device provided by the embodiment of the disclosure is applied to a first terminal. Here, the first terminal may be any electronic device that can receive radio frequency signals; the first terminal may also be a terminal including a wireless charging receiver. The first terminal includes but is not limited to: the mobile terminal such as a mobile phone, a tablet computer or a wearable device can also be other fixed devices capable of receiving wireless charging.

In the disclosed embodiment, the wireless charging device can be used for forward charging or reverse power supply; when the wireless charging device is charged, the charging circuit transmits a wireless signal, and the wireless charging device is a receiving end; when the wireless charging device is used for supplying power in a reverse direction, the charging circuit receives a wireless signal, and the wireless charging device is a sending end. Here, the charging device receives or transmits a wireless signal, and electromagnetic induction occurs through a coil to receive or transmit the wireless signal.

Therefore, the embodiment of the disclosure provides a method for detecting a Q value by setting a Q value detection module in a wireless charging device, and determining the Q value by directly detecting a charging parameter of a coil by the Q value detection module.

In addition, in the Q value detection of the embodiment of the present disclosure, the Q value is determined by directly detecting the charging parameter on the coil through the Q value detection module connected to the coil, and the Q value of the wireless charging device can be accurately detected without considering the inductive reactance of different coils or the impedance of other objects on the wireless charging device.

In addition, the accuracy of detecting the Q value is improved, the accuracy of detecting the foreign matters can also be improved, and the situation that the foreign matters exist actually but are not detected due to inaccurate detection of the Q value is greatly reduced, so that the safety of wireless charging is improved.

In some embodiments, as shown in fig. 3, the charging circuit 110 includes: a resonator circuit 110, the resonator circuit comprising: a coil Ls and a resonant capacitor Cs; the resonant capacitor is connected in series with the coil 111;

the Q value detection module 12 is connected to the resonator sub-circuit 110, and configured to determine a Q value by detecting a discharge parameter of the resonator sub-circuit 110 when the charging circuit 11 sends a wireless signal.

Here, the coil Ls may be regarded as the coil 111 in the above embodiment.

In practical application, if the coil and the resonant capacitor are integrated in one chip, when the Q-value detection module is used for detecting a resonant sub-circuit formed by the coil and the resonant capacitor, no additional lead is required for connecting the coil.

As shown in fig. 4, in some embodiments, the wireless charging apparatus further includes:

the control module 13 is connected to the Q value detection module 12, and configured to send an enable signal for enabling the Q value detection module 12;

the Q value detection module 12 is configured to enter a working state of detecting the Q value under the enabling of the enable signal.

Here, the control module may control an operating state of the Q value detection module, for example, when the control module sends an enable signal to the Q value detection module, the control module is configured to control the Q value detection module to enter the operating state of detecting the Q value; for another example, the control module is configured to control the Q value detection module to exit from a detection state of detecting the Q value when the control module sends the disable signal to the Q value detection module.

In this disclosure, the control module sends an enable signal to an enable terminal of the Q-value detection module, the enable terminal is activated by the enable signal, and the Q-value detection module enters a working state of detecting the Q-value.

Therefore, in the embodiment of the present disclosure, the Q value detection module can be enabled only when the Q value detection module needs to detect the Q value, so that the Q value detection module can enter the working state of detecting the Q value. Therefore, the Q value detection module is not required to be in the working state all the time, and the power consumption of the wireless charging device can be saved.

In some application scenarios, when the Q value detection module enters the working state based on the enable signal, the Q value is not always determined by detecting the discharge parameter of the coil, and only when the coil transmits a wireless signal, the Q value is determined by detecting the discharge acceptance number of the coil.

For example, referring to fig. 4 again, in some embodiments, the Q value detection module 12 includes:

a detection circuit 121, connected to the coil 111, for detecting a discharge parameter when the coil 111 transmits a wireless signal;

and the conversion circuit 122 is connected with the output end of the detection circuit 121 and is used for determining the Q value according to the discharge parameters.

Here, the detection circuit further includes: at least one switching tube. And controlling whether the Q value detection module detects the discharge parameter of the coil to determine the Q value or not based on the conduction or not of the switching tube.

For example, referring to fig. 4, the detection circuit 121 includes at least one switch tube 1211; wherein the switch tube 1211 is connected to the coil 111;

the control module 13 is further connected to the switch tube 1211, and configured to send a first control signal to the switch tube 1211 to control the switch tube 1211 to be turned on, or send a second control signal to the switch tube 1211 to control the switch tube 1211 to be turned off;

the Q-value detecting module 12 is configured to detect the discharge parameter of the wireless signal transmitted by the coil 111 when the switching tube 1211 is turned off after the operating state is entered, and determine the Q-value; alternatively, when the switch tube 1211 is in conduction, the detection of the discharge parameter of the coil is stopped.

In practical applications, the number of the switching tubes may be two, as shown in fig. 4, the wireless charging device further includes a first power supply 14;

the charging circuit further comprises: a resonant capacitance Cs; the resonant capacitor Cs is connected to the coil 111;

the detection circuit 121: the method comprises the following steps: two switching tubes 1211; wherein, a switch tube 1211 is connected between the resonant capacitor Cs and the first power supply 14; one end of the other switch tube 1211 is connected with the coil 111, and the other end is grounded;

the control module is further connected to the two switching tubes 1211, and configured to send a first control signal to the switching tube 1211 to control the switching tube 1211 to turn on, or send a second control signal to the switching tube 1211 to control the switching tube 1211 to turn off;

when the switch tube 1211 is turned on, the first power supply supplies power to the resonant capacitor Cs; when the switching tube 1211 is turned off, the coil 111 transmits a wireless signal based on the discharge of the resonant capacitor Cs;

the Q-value detecting module 12 is configured to detect the discharge parameter of the wireless signal transmitted by the coil 111 when the switching tube 1211 is turned off after the operating state is entered, and determine the Q-value; alternatively, when the switch tube 1211 is in conduction, the detection of the discharge parameter of the coil 111 is stopped.

Here, the first power supply 14 is configured to supply power to the charging circuit when the Q value detection module enters an operating state. In one embodiment, the first power supply is a 5V power supply.

In an embodiment, as shown in fig. 4, between the coil 111 and the switch tube 1211, there are further included: the resonant capacitance Cs.

Here, the switching tube may be any component having an on or off function. For example, the switch tube may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET).

When the Q value detection module enters an operating state based on an enable signal and the switching tube is disconnected, the detection circuit is used for detecting a discharge parameter when the coil transmits a wireless signal; when the switch tube is conducted, the detection circuit cannot detect the discharge parameters on the coil.

Here, the control module generally controls the overall operation of the charging device, for example, controls the on/off operation of the switching tube. The control module may include one or more processors to execute instructions to perform corresponding operations.

Here, the control module may also be a control circuit having signal processing capability; the control circuit may include a control chip or controller, etc.

Here, the discharge parameter may be a voltage value; the detection circuit can be used for detecting the voltage value of the coil or the harmonic oscillator circuit. As such, the detection circuit may include a voltmeter for detecting voltage.

Here, the conversion circuit may include an analog-to-digital converter (ADC) converter. The ADC is used for converting the analog electric signal into a digital signal. In the embodiment of the present disclosure, when the detection voltage obtains the discharge parameter of the electrical signal, the discharge parameter of the electrical signal may be converted into a digital discharge parameter for calculation, so as to determine the Q value.

As such, in the disclosed embodiment, the discharge parameter on the coil can be directly detected by the detection circuit, and the Q value can be determined based on the discharge parameter by the conversion circuit, which can improve the accuracy of detecting the Q value.

Exemplarily, please refer to fig. 3 again, an embodiment of the present disclosure provides a wireless charging device, including: a charging circuit 11, a Q value detection module 12, a control module 13 and a first power supply 14;

the charging circuit 11 includes:

a harmonic oscillator circuit 110; the harmonic oscillator circuit 110 includes a coil Ls and a resonant capacitor Cs; the coil Ls is connected in series with the resonant capacitor Cs;

the Q value detection module 12 includes:

a detection circuit 121, comprising: a first switch tube Q1, a first switch tube Q2 and a detection sub-circuit 1212; wherein the first switch tube Q1 is connected between the resonant capacitor Cs and the first power supply 14; one end of the second switching tube Q2 is connected with the coil Ls, and the other end is grounded; the input end of the detection sub-circuit 1212 is connected to the resonator sub-circuit 110, and is configured to detect a discharge parameter on the resonator sub-circuit when the first switching tube Q1 and the second switching tube Q2 are turned off;

the conversion circuit 122 is connected with the output end of the detection sub-circuit 1212, and is used for determining a Q value according to the discharge parameter;

the control module 13 is connected to an enable end of the Q value detection module, and configured to send an enable signal enabling the Q value detection module to the Q value detection module;

the control module 13 is further connected to the first switching tube Q1 and the second switching tube Q2, and is configured to control the switching states of the first switching tube Q1 and the second switching tube Q2.

In the above example, the Q value detection module may also be used to detect only the discharge parameter on the coil. For example, the input terminal of the detection sub-circuit 1212 is connected to two terminals of the coil Ls for detecting the voltage on the coil Ls.

In the above example, the work flow of the Q value detection module is as follows:

the first step is as follows: the control module 13 is configured to send an enable signal to the Q value detection module 12, and then the Q value detection module 12 enters a working state based on the enable signal;

the second step is that: a first power supply 14 supplies power to the wireless charging device; the control module 13 sends a first control signal to the first switch tube Q1 and the second switch tube Q2; the first switch Q1 and the second switch Q2 are turned on, and the first power supply 14 charges the resonant capacitor Cs; the charging time is T _ c;

in the second step, although the Q-value detection module is enabled, the coil Ls cannot emit a wireless signal because the first power supply 14 charges the Cs capacitor, and the Q-value detection module cannot be used to detect the discharge parameter of the coil to determine the Q-value.

Thirdly, at the end of the time T _ c, the control module 13 sends a second control signal to the first switching tube Q1 and the second switching tube Q2; when the first switching tube Q1 and the second switching tube Q2 are turned off, the coil Ls and the resonant capacitor Cs oscillate freely; collecting voltages Vcoil at two ends of Ls and Cs within a time interval delta T within the free oscillation time; collecting at least Vcoil of two sampling points in the delta T; and based on Vcoil, the Q value is calculated.

In an alternative embodiment, as shown in fig. 5, a first voltage Vth1 at a first time T1 is collected, and a second time T2 and a second time Vth2 are collected; when the time interval delta T is T2-T1; thus, can be made of

Calculating the ratio of L/R:

wherein, the

Thus; the Q value can be calculated:

wherein, W is the working frequency; l is a coil inductance and R is a resistance of an object placed on the first terminal.

In practical applications, the impedance of the R of the object actually placed on the first terminal is unknown, and it is difficult to accurately determine the inductive reactance of the coil L on the first terminal, so that the R cannot pass through

To calculate an accurate Q value. In the embodiment of the disclosure, the ratio of L/R can be calculated by sampling the voltage value when the coil sends the wireless signal and calculating the time interval for collecting the voltage value; thereby can be based on

And calculating a more accurate Q value. Therefore, the accuracy of calculating the Q value can be greatly improved.

As shown in fig. 4, in some embodiments, the detecting circuit 121 is configured to determine a first Q value by detecting a discharge parameter on the coil 111 when the charging circuit transmits a first pulse signal;

the control module 13 is connected to the output end of the converting circuit 122, and configured to determine whether a foreign object interfering with wireless charging exists in a predetermined range of the first terminal based on the first Q value and a predetermined threshold.

The foreign matter interfering with the wireless charging here may be various metal objects or objects containing metal. For example, the foreign matter may be a metal-containing key, an iron piece, or the like.

In the embodiment of the disclosure, whether a foreign object interfering wireless charging exists in the predetermined range of the first terminal is determined by determining the Q value of the first terminal, the alignment problem of the coil of the first terminal and the coils of other terminals does not need to be considered, and the power loss problem of other terminals does not need to be considered, so that the accuracy of detecting the foreign object can be greatly improved, and the probability of misjudgment is greatly reduced.

Referring again to fig. 4, in some embodiments, the detecting circuit 121 is configured to determine a second Q value by detecting a discharge parameter on the coil 111 when the charging circuit transmits the second pulse signal;

the device, still include:

the communication module 15 is configured to receive a reference Q value returned by the second terminal based on the second pulse signal;

the control module 13 is connected to the communication module 15, and configured to determine whether a foreign object that interferes with wireless charging exists between the first terminal and the second terminal based on the second Q value and the reference Q value.

Here, the second pulse signal is used to wake up the second terminal. The period of the second pulse signal is greater than the period of the first pulse signal.

Here, the second terminal is within a predetermined range of the first terminal; the second terminal can be charged based on the wireless signal transmitted by the first terminal.

In the embodiment of the disclosure, whether foreign matter interfering wireless charging exists between the first terminal and the second terminal can be determined based on the reference Q value returned by the second terminal and the Q value of the coil of the first terminal for transmitting the wireless signal; in this way, the occurrence of erroneous judgment of the existence of foreign matters can be reduced, and the safety of wireless charging can be improved.

A specific example of a wireless charging device is provided below in conjunction with any of the above wireless charging device embodiments, as shown in fig. 6, the wireless charging device comprising:

the device comprises a charging circuit 11, a Q value detection module 12, a control module 13, a first power supply 14, a communication module 15, a second power supply 16 and a rectifying circuit 17; wherein the content of the first and second substances,

the charging circuit 11 includes: a harmonic oscillator circuit 110; the resonator sub-circuit 110 includes: a coil Ls and a resonant capacitor Cs; the charging circuit 11 is connected with the rectifying circuit 17;

the rectifier circuit 17 connected between the charging circuit 11 and the second power supply 16; the rectifying circuit comprises a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5 and a sixth switching tube Q6;

the Q value detection module 12 includes: a detection circuit 121 and a conversion circuit 122; wherein, the detection circuit 121 includes: a first switch tube Q1 and a second switch tube Q2; the input end of the detection circuit 121 is connected to the resonator circuit 110, and the output end of the detection circuit 121 is connected to the conversion circuit 122; the first switching tube Q1 is connected between the resonant capacitor Cs and the first power supply 16; one end of the second switching tube Q2 is connected with the coil Ls, and the other end is grounded;

the control module 13 is respectively connected to the first switching tube Q1 and the second switching tube Q2; the control module is further connected to the enable terminal of the Q value detection module 12 and the output terminal of the conversion circuit 122 respectively;

the communication module 16 is connected with the control module 13.

Here, when the wireless charging device is used for forward charging, the charging circuit receives a wireless signal, and the rectifying circuit converts an alternating current signal into a direct current signal to supply power to the second power supply; when the wireless charging device is used for reverse power supply, the rectifying circuit converts a direct current signal provided by the second power supply into an alternating current signal, and then the wireless signal is transmitted to the outside through the charging circuit to discharge.

Here, the Q value detection module is configured to collect a discharge parameter, such as a voltage, on the coil when the charging circuit transmits the wireless signal; and determining a Q value based on the discharge parameter.

Here, the control module is configured to control an overall operation of the wireless charging apparatus. For example, the control module is configured to control the first switching tube and the second switching tube to be turned on and off, or to control the Q-value detection module to enter a working state for detecting a Q-value or exit a control state for detecting a Q-value; and a controller for determining whether there is a foreign matter or a second device or the like interfering with the wireless charging based on the Q value.

Here, Q3, Q4, Q5 and Q6 of the rectifier circuit may be MOS transistors; the rectifier circuits of Q3, Q4, Q5 and Q6 form a full-bridge rectifier circuit.

In one embodiment, the control module is controlled by an MCU.

In an embodiment, the rectifier circuit and the second power supply further include: at least one MOS tube; used for regulating the output voltage of the rectifying circuit. For example, as shown in fig. 6 as MOS transistor Q7.

In an embodiment, the wireless charging device further includes an internal power supply module, and the internal power supply module is configured to supply power to each module or circuit of the wireless charging device. Of course, in other embodiments, each module or circuit of the wireless charging device may be powered by an external power source.

In the embodiment of the disclosure, the Q value can be determined based on the discharge parameters of the Q value detection module on the detection coil, so that the inductive reactance of the coil and the resistance of an object on the coil do not need to be known, and the Q value can be accurately calculated. Moreover, the embodiment of the disclosure can also determine whether a foreign object exists in the predetermined range of the first terminal based on the Q value, without considering the relative position of the coil of the first terminal and other receiving devices and the power loss of the wireless signal transmitted between the first terminal and other receiving devices, so that the accuracy of detecting the foreign object can be greatly improved, the misjudgment of whether the foreign object exists is reduced, and the safety of wireless charging is improved.

Here, it should be noted that: the following description of a wireless charging method corresponds to the description of the above-described wireless charging apparatus. For technical details that are not disclosed in the embodiments of the wireless charging method in the present disclosure, please refer to the description of the embodiments of the wireless charging device in the present disclosure, and the detailed description is not provided herein.

Fig. 7 is a flow chart illustrating a wireless charging method according to an exemplary embodiment, as shown in fig. 7, the method comprising the steps of:

step S31: acquiring a Q value obtained by detecting a discharge parameter on the coil by the Q value detection module when the charging circuit sends a wireless signal;

step S32: and determining whether foreign matters which interfere wireless charging exist in a preset range of the first terminal according to the Q value.

The wireless charging method provided by the embodiment of the disclosure is applied to a first terminal; wherein, first terminal includes charging circuit and quality factor Q value detection module, charging circuit includes: and a coil.

Here, the first terminal may be any electronic device that can receive radio frequency signals; the first terminal may also be a terminal including a wireless charging receiver. The first terminal includes but is not limited to: the mobile terminal such as a mobile phone, a tablet computer or a wearable device can also be other fixed devices capable of receiving wireless charging.

Here, the step S31 includes:

Thus, in the embodiment of the present disclosure, the impedance ratio between the inductance of the coil and the resistance on the coil (i.e., the resistance of the object on the first terminal) can be calculated by sampling the voltage when the coil transmits the wireless signal and calculating the time interval for acquiring the voltage value; thereby being capable of calculating more accurate Q value; so that the accuracy of calculating the Q value can be greatly improved.

Of course, in other embodiments, the voltage values on the coil are collected, and the voltage values in a plurality of time periods may be collected, for example, the first voltage of T1, the second voltage of T2, the third voltage of T3, the nth voltage of … …, Tn is collected; therefore, the impedance ratio can be calculated according to any two voltages in the voltages and the time interval between the two voltages; calculating a Q value according to the average value of the impedance ratios; thereby further improving the accuracy of the Q value.

Here, the wireless signal includes: the first pulse signal or the second pulse signal. In practical application, the first pulse signal is used for detecting whether foreign matters interfering with wireless charging exist or not; and the second pulse signal is used for waking up the second terminal. The second terminal is a terminal within a preset range of the first terminal, and the second terminal can be charged based on the wireless signal transmitted by the first terminal.

In one embodiment, the first pulse signal is a wireless signal with short pulse energy (Analog ping); the second pulse signal is a wireless signal of long pulse energy (Digital ping). Here, the energy carried by the first pulse signal is smaller than the energy carried by the second pulse signal.

In practical application, if a metal foreign object exists in a predetermined range of the first terminal, a misjudgment that no metal foreign object exists may occur due to inaccurate Q value detection; so, if first terminal transmission radio signal gives the power supply of second terminal, the metallic foreign object can generate heat, can bring very big interference for the wireless charging of first terminal and second terminal to and bring the loss of certain degree for first terminal and second terminal.

In the embodiment of the disclosure, the Q value can be determined according to the discharge parameter on the coil directly detected by the Q value detection module, and the accuracy of determining the Q value can be improved. And, because the accuracy of detecting Q value has been improved to also can improve the accuracy of detecting the foreign matter greatly, the condition emergence that leads to actually having the foreign matter but not detecting to have the foreign matter because the Q value that detects is inaccurate has significantly reduced, can improve the security of wireless charging.

In some embodiments, the method further comprises:

In other embodiments, the method further comprises:

In the embodiment of the present disclosure, the Q value detection module may be enabled only when the Q value detection module needs to detect the Q value, so that the Q value detection module enters a working state; and when the Q value detection module does not need to detect the Q value, enabling the Q value detection module so as to enable the Q value detection module to exit the working state. Therefore, the Q value detection module is not required to be in the working state of detecting the Q value all the time, and the power consumption of the wireless charging device can be saved.

Here, it can be understood that the Q value detection module may or may not be used for detecting the discharge parameter of the coil after entering the operating state of detecting the Q value. For example, after the Q-value detection module enters a working state of detecting a Q-value, the discharge parameter of the coil is detected only when the coil transmits a wireless signal, so as to determine the Q-value.

Here, the enable signal is only used for enabling the Q value detection module to enter an operating state; the de-enable signal is only used for enabling the Q value detection module to exit the working state.

As shown in fig. 8, in some embodiments, the step S31 includes:

step S311: acquiring a first Q value obtained by detecting a discharge parameter on the coil by the Q value detection module when the charging circuit sends a first pulse signal;

the step S32 includes:

step S321: and determining whether an interference wireless charging interference foreign matter exists in a predetermined range of the first terminal based on the first Q value and a predetermined threshold.

Wherein, the step S321 includes:

alternatively, the first and second electrodes may be,

Here, the magnitude of the Q value is positively correlated with the inductance of the coil, and the magnitude of the Q value is correlated with the resistance of the resistor. As such, in the disclosed embodiments, by setting a predetermined threshold; based on the detected Q value compared to a threshold value, it can be determined whether a foreign object is currently present or a second terminal is present within a predetermined range of the first terminal.

The second terminal, i.e. the receiving device, may receive the wireless signal sent by the first terminal.

In some application scenarios, if a foreign matter interfering wireless charging exists in a predetermined range of the first terminal, the first pulse signal is continuously sent for continuously detecting the Q value; and not switching to transmit the second pulse signal until it is determined that the second terminal is present within the predetermined range.

For example, referring again to fig. 9, in some embodiments, the method further comprises:

step S33: in response to the fact that foreign matters which interfere with wireless charging do not exist in a preset range of the first terminal, controlling the charging circuit to transmit a second pulse signal;

In the embodiment of the present disclosure, if it is determined that the second terminal exists within the predetermined range of the first terminal, the second pulse signal may be transmitted to wake up the second terminal. In addition, in the embodiment of the present disclosure, it may be further determined whether a foreign object that interferes with wireless charging exists between the first terminal and the second terminal through the transmitted second pulse signal.

As shown in fig. 10, in some embodiments, the step S31 includes:

step S312: acquiring a second Q value obtained by detecting a discharge parameter on the coil by the Q value detection module when the charging circuit sends a second pulse signal;

the method further comprises the following steps:

step S34: receiving a reference Q value returned by the second terminal based on the second pulse signal;

step S35: determining whether foreign matter that interferes with wireless charging exists between the first terminal and the second terminal based on the second Q value and the reference Q value.

Here, the second terminal is a terminal of a first type of charging protocol; wherein the first charging protocol includes, but is not limited to: proprietary charging protocol or Extended Power Profile (EPP) protocol.

Here, the terminal of the first charging protocol supports transmission of the reference Q value.

In the embodiment of the present disclosure, the first terminal may receive the reference Q value returned by the second terminal by using an in-band communication method, or receive the reference Q value returned by the second terminal by using an out-of-band communication method. Here, the manner of in-band communication is: carrying the reference Q value into a wireless signal for transmission; the out-of-band communication mode is as follows: and directly transmitting the reference Q value by adopting a wireless network or Bluetooth and the like.

Wherein, the step S35 includes:

alternatively, the first and second electrodes may be,

Here, the predetermined multiple may be a value greater than or equal to 0.7. In one embodiment, the predetermined multiple is 0.8. In this way, by setting the predetermined multiple, the influence of the ambient environment on the impedance value in the Q value is taken into account, and therefore the accuracy of actually detecting foreign matter can be further improved.

In the above-described embodiment, the predetermined threshold value is often set to be smaller than the reference Q value as well.

In the embodiment of the present disclosure, if the second terminal can report the reference Q value thereof, the detected Q value may be compared with the actually reported reference Q value based on the Q value detected by the first terminal and the reference Q value reported by the second terminal, so as to determine whether a foreign object exists between the first terminal and the second terminal; thus, the accuracy of foreign matter detection can be greatly improved.

In some application scenarios, if it is determined that no foreign object exists between the first terminal and the second terminal, the power transmission stage may be entered; the power transmission stage is a stage of sending a wireless signal to the first terminal to charge the second terminal. Or if the foreign matter exists between the first terminal and the second terminal, determining that the first terminal transmits the first pulse signal in a conversion mode; in this case, the Q value detection may not be performed.

In some embodiments, the method further comprises:

The second terminal is a terminal of a second type of charging protocol; wherein the second charging protocol includes, but is not limited to: basic Power Profile (BPP) protocol.

Here, the terminal of the second charging protocol does not support transmission of the reference Q value.

Wherein the determining whether a foreign object interfering with wireless charging exists between the first terminal and the second terminal based on a difference between the transmission power and the reception power includes:

if the difference value between the sending power and the receiving power is larger than or equal to the preset loss power, determining that a foreign matter interfering charging exists between the first terminal and the second terminal;

alternatively, the first and second electrodes may be,

and if the difference value of the transmitting power and the receiving power is smaller than the preset loss power, determining that no foreign matter interfering charging exists between the first terminal and the second terminal.

In the embodiment of the present disclosure, since the second terminal does not have the capability of transmitting the reference Q value, or the first terminal receives the reference Q value transmitted by the second terminal within a predetermined time due to other reasons, the detection of the foreign object may be performed based on the power loss. Therefore, according to the embodiment of the present disclosure, even when the first terminal does not receive the reference Q value reported by the second terminal, whether a foreign object interfering with wireless charging exists between the first terminal and the second terminal can still be detected through power consumption loss, so that whether a foreign object exists between the second terminal and the first terminal can also be detected for the second terminal that does not support reporting.

A specific example of a wireless charging method is provided below in conjunction with any of the above wireless charging apparatus embodiments, where the wireless charging method is applied to a first terminal, and the first terminal includes: charging circuit and quality factor Q value detect the module, charging circuit includes: and a coil. As shown in fig. 11, the method comprises the steps of:

step 51: if the triggering operation acting on a User Interface (UI) of a first terminal is detected, starting a wireless direction charging state of the first terminal;

here, the user clicks a shortcut key for wireless reverse charging on the UI of the first terminal, for example, as shown in fig. 12, clicks a "wireless reverse charging" key on the UI; the first terminal may detect a trigger operation acting on the UI, thereby initiating a wireless charging state of the first terminal.

Step 52: transmitting a first pulse signal to detect whether foreign objects exist within a predetermined range of the first terminal;

the first pulse signal is a short pulse wireless signal.

In an optional embodiment, the first terminal transmits a first pulsed wireless charging signal; the Q value detection module is used for acquiring a discharge parameter of a first pulse signal transmitted by the coil and determining a first Q value based on the discharge parameter; and determining whether foreign matter interfering with a wireless charging signal exists within a predetermined range of the first terminal based on the first Q value.

For example, if the first Q value is less than or equal to a set threshold, it is determined that the foreign object exists within a predetermined range of the first terminal; and responding to the existence of foreign matters in the preset range of the first terminal, and determining that the first terminal continues to transmit the first pulse signal.

For another example, if the first Q value is greater than the threshold, it is determined that no foreign object interfering with wireless charging exists within a predetermined range of the first terminal; and determining that the first terminal is switched to transmit a second pulse signal in response to the fact that no foreign matter which interferes with wireless charging exists within a predetermined range of the first terminal.

Here, the second pulse signal is a long pulse wireless signal.

Here, the period of the second pulse signal is greater than the period of the first pulse signal.

Step S53: and transmitting a second pulse signal to detect whether foreign matters exist between the first terminal and the second terminal.

In an optional embodiment, the first terminal transmits a second pulse signal, and if a reference Q value returned by the second terminal based on the second pulse signal is received, the Q value detection module acquires a discharge parameter of the first pulse signal, and determines a second Q value based on the discharge parameter; determining whether foreign matter that interferes with wireless charging exists between the first terminal and the second terminal based on the second Q value and the reference Q value.

The second terminal here is a terminal that satisfies a first charging protocol that supports transmission of the reference Q value.

For example, if the second Q value is greater than or equal to the reference Q value of a predetermined multiple, it is determined that there is no foreign object that interferes with wireless charging between the first terminal and the second terminal; in response to the absence of the foreign object between the first terminal and the second terminal, determining that the first terminal enters a power transmission phase; wherein, in the power transmission phase, the first terminal transmits a wireless charging signal to the second terminal for supplying power to the second terminal.

For another example, if the second Q value is smaller than the reference Q value of the predetermined multiple, it is determined that a foreign object that interferes with wireless charging exists between the first terminal and the second terminal; and in response to the foreign matter not existing between the first terminal and the second terminal, determining that the first terminal retransmits the first pulse signal, and stopping the detection of the Q value.

Here, if the foreign object between the first terminal and the second terminal moves out, the Q value detection module of the first terminal continues to detect the Q value.

In another optional embodiment, the first terminal transmits a second pulse signal, and if a reference Q value returned by the second terminal based on the second pulse signal is received, the transmission power of the first terminal and the reception power of the second terminal are obtained; determining whether a foreign object that interferes with wireless charging exists between the first terminal and the second terminal based on the transmission power and the reception power.

Here, determining whether or not a foreign object that interferes with wireless charging exists between the first terminal and the second terminal by using the transmission power and the reception power is performed when the first terminal enters a power transmission phase.

For example, if the difference between the transmission power and the reception power is greater than or equal to a predetermined power loss, it is determined that the foreign object exists between the first terminal and the second terminal.

For another example, if the difference between the transmission power and the reception power is smaller than the predetermined power loss, it is determined that the foreign object does not exist between the first terminal and the second terminal.

In the embodiment of the disclosure, the Q value can be obtained based on the discharge parameters on the detection coils between the Q value detection modules, so that the detection accuracy of the Q value is improved.

In the embodiment of the disclosure, the accuracy of the detection of the Q value is improved, so that the misjudgment of the interference of the wireless charging caused by the inaccurate detection of the Q value is greatly reduced, the danger of the wireless charging caused by the fact that foreign matters exist in the actual situation and the misjudgment does not exist, and the safety of the wireless charging is improved.

In the embodiment of the present disclosure, it may further be determined, through a reference Q value reported by a second terminal and a receiving device for wireless charging, whether a foreign object that interferes with wireless charging exists in the first terminal and the second terminal. Or, if the second terminal cannot report the reference Q value, or the first terminal does not receive the reference Q value reported by the second terminal due to other reasons, the foreign object may be detected based on a power loss detection method in a power transmission stage, so as to detect whether the foreign object exists between the first terminal and the second terminal in an all-around manner.

An embodiment of the present disclosure further provides a terminal, including:

a memory for storing processor-executable instructions;

wherein the processor is configured to: when the executable instructions are executed, the wireless charging method according to any embodiment of the disclosure is realized.

The memory may include various types of storage media, which are non-transitory computer storage media capable of continuing to remember the information stored thereon after a communication device has been powered down.

The processor may be connected to the memory via a bus or the like for reading the executable program stored on the memory, for example, for implementing at least one of the methods shown in fig. 7-11.

Fig. 13 is a block diagram illustrating a terminal 800 including a wireless charging device according to an example embodiment. For example, the terminal 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.

Referring to fig. 13, terminal 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the terminal 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on terminal 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of terminal 800. Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for terminal 800.

The multimedia component 808 includes a screen providing an output interface between the terminal 800 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the terminal 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

Sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for terminal 800. For example, sensor assembly 814 can detect the open/closed state of device 800, the relative positioning of components, such as a display and keypad of terminal 800, sensor assembly 814 can also detect a change in position of terminal 800 or a component of terminal 800, the presence or absence of user contact with terminal 800, orientation or acceleration/deceleration of terminal 800, and a change in temperature of terminal 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 816 is configured to facilitate communications between terminal 800 and other devices in a wired or wireless manner. The terminal 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the terminal 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Embodiments of the present disclosure also provide a computer-readable storage medium storing an executable program, where the executable program, when executed by a processor, implements the wireless charging method according to any embodiment of the present disclosure. For example, at least one of the methods shown in fig. 7-11 is implemented.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A wireless charging device applied to a first terminal, the wireless charging device comprising: a charging circuit and a quality factor Q value detection module; wherein the content of the first and second substances,

the charging circuit includes: a coil;

2. The wireless charging device of claim 1, wherein the Q value detection module comprises:

3. The wireless charging apparatus according to claim 1 or 2, further comprising:

4. The method of claim 3, wherein the detection circuit comprises:

5. The wireless charging apparatus of claim 2,

the detection circuit is used for determining a first Q value by detecting a discharge parameter on the coil when the charging circuit transmits a first pulse signal;

6. The wireless charging apparatus of claim 5,

the detection circuit is used for determining a second Q value by detecting a discharge parameter on the coil when the charging circuit transmits the second pulse signal;

the device, still include:

7. A wireless charging processing method is applied to a first terminal, the first terminal comprises a charging circuit and a quality factor Q value detection module, the charging circuit comprises: a coil; the method comprises the following steps:

8. The method of claim 7, further comprising:

9. The method of claim 7, wherein the obtaining the Q value obtained by the Q value detection module detecting the discharge parameter on the coil when the charging circuit sends the wireless signal comprises:

10. The method according to claim 7 or 8, wherein the obtaining of the Q value obtained by the Q value detection module detecting the discharge parameter on the coil when the charging circuit sends the wireless signal comprises:

11. The method of claim 9, wherein the determining whether foreign objects interfering with wireless charging exist within a predetermined range of the first terminal based on the first Q value and a predetermined threshold comprises:

if the first Q value is smaller than or equal to the threshold value, determining that foreign matters which interfere wireless charging exist in a preset range of the first terminal; alternatively, the first and second electrodes may be,

12. The method of claim 11, further comprising:

13. The method of claim 12, wherein the obtaining the Q value obtained by the Q value detection module detecting the discharge parameter on the coil when the charging circuit sends the wireless signal comprises:

the method further comprises the following steps:

14. The method of claim 13, wherein the determining whether foreign objects interfering with wireless charging exist between the first terminal and the second terminal based on the second Q value and the reference Q value comprises:

if the second Q value is larger than or equal to the reference Q value of the preset multiple, determining that no foreign matter interfering wireless charging exists between the first terminal and the second terminal; alternatively, the first and second electrodes may be,

15. The method of claim 13, further comprising:

16. The method of claim 12, further comprising:

17. A terminal, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: when the executable instructions are executed, the wireless charging processing method of any one of claims 7 to 16 is implemented.

18. A computer-readable storage medium storing an executable program, wherein the executable program when executed by a processor implements the wireless charging processing method of any one of claims 7-16.