Control method, control device, wireless charging device and chip for wireless charging device

Abstract

The present application discloses a control method, a control device, a wireless charging device and a chip for a wireless charging device, which belongs to the field of wireless charging devices. The control method of the wireless charging device includes: obtaining an attenuation signal when discharging energy from the LC resonant network of the charged wireless charging device; determining a starting time according to the zero-crossing time of the attenuation signal; controlling the charging of the target capacitor at the starting time and ending the charging after a certain period of time, wherein the certain period of time is the target number of cycles of the attenuation signal; and controlling the working state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold. The control method of the wireless charging device of the present application can improve the accuracy of the wireless charging device in judging whether there is an electric object connected to the wireless charging device while reducing the power consumption of the wireless charging device.

Description

Technical Field

[0001] The present application relates to the field of wireless charging devices, and in particular to a control method, a control device, a wireless charging device, and a chip for wireless charging devices. Background Art

[0002] To reduce standby power consumption, wireless charging devices typically use Q-value detection technology to identify the connected device's status. However, when the device uses a low-resistance device, the Q-value difference between the connected and unloaded states can be very small, even falling within the error range. This makes it impossible to accurately distinguish whether the wireless charging power transmitter is connected to the device. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a control method, control device, wireless charging device, and chip for a wireless charging device, which can reduce the power consumption of the wireless charging device while improving the accuracy of the wireless charging device's judgment of whether a power-consuming object is connected to the wireless charging device.

[0004] In a first aspect, the present application provides a method for controlling a wireless charging device, the method comprising:

[0005] Acquire an attenuation signal when discharging energy from an LC resonant network of the charged wireless charging device;

[0006] Determining a starting time according to the zero-crossing time of the attenuated signal;

[0007] Controlling charging of the target capacitor at the starting moment and ending the charging after a certain time, wherein the certain time is a target number of cycles of the attenuation signal;

[0008] Based on the target voltage of the target capacitor and a preset voltage threshold, the working state of the wireless charging device is controlled; the working state includes a dormant state or an awake state.

[0009] According to the control method of the wireless charging device of the present application, by controlling the charging time of a fixed number of attenuation signal cycles of the target capacitor of the wireless charging device while controlling the discharge of energy from the LC resonant network of the charged wireless charging device, the magnitude of the resonant frequency generated by the LC resonant networks corresponding to the powered object and the non-powered object placed in the wireless charging device can be converted into a fixed number of cycle durations, and further converted into a voltage magnitude of the target capacitor during the fixed number of charging cycles. This method converts the method of identifying whether a powered device is connected to the wireless charging device by using the resonant frequency into a method of identifying whether a powered device is connected by using the voltage magnitude of the target capacitor, thereby improving the intuitiveness and accuracy of the wireless charging device's determination of whether a powered device is connected to the wireless charging device. Based on the determination result, the wireless charging device can be controlled to enter an awake state or a sleep state accordingly, thereby reducing the power consumption of the wireless charging device and increasing the standby time of the wireless charging device. No additional peripheral electronic components are required, thus reducing costs and further reducing the overall power consumption of the wireless charging device.

[0010] According to one embodiment of the present application, controlling the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold includes:

[0011] When the target voltage is greater than the preset voltage threshold, determining that a power-consuming device is connected to the wireless charging device, and controlling the wireless charging device to enter the awake state;

[0012] When the target voltage is not greater than the preset voltage threshold, it is determined that no power-consuming device is connected to the wireless charging device, and the wireless charging device is controlled to enter the sleep state.

[0013] According to one embodiment of the present application, controlling the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold includes:

[0014] In a first time period, when multiple acquired target voltages are all greater than the preset voltage threshold, the wireless charging device is controlled to enter the awake state.

[0015] According to one embodiment of the present application, obtaining an attenuation signal when discharging energy from an LC resonant network of a charged wireless charging device includes:

[0016] When discharging energy from an LC resonant network of the charged wireless charging device, obtaining a sinusoidal wave signal generated by the LC resonant network;

[0017] The sinusoidal wave signal is converted into a square wave signal to obtain the attenuated signal; the attenuated signal has the same frequency as the sinusoidal wave signal.

[0018] According to one embodiment of the present application, discharging energy from the LC resonant network of the charged wireless charging device includes:

[0019] Based on the target detection period, charging the LC resonant network for a second time period;

[0020] After the LC resonant network is charged for a second period of time, the LC resonant network is discharged.

[0021] According to an embodiment of the present application, the preset voltage threshold is determined according to a target voltage of the target capacitor obtained last time.

[0022] In a second aspect, the present application provides a wireless charging device, comprising:

[0023] LC resonant network;

[0024] An H-bridge inverter connected to the LC resonant network;

[0025] a detection circuit, wherein a target capacitor is provided therein; the detection circuit is configured to charge the target capacitor for a certain period of time when discharging the charged LC resonant network, wherein the certain period of time is a period of a target number of attenuation signals, wherein the attenuation signals are generated by the LC resonant network during the discharging process;

[0026] A control module, wherein an input end of the control module is connected to the output end of the detection circuit, and is used to control the H-bridge inverter to charge or discharge the LC resonant network, and control the operating state of the wireless charging device based on the output signal of the detection circuit; the operating state includes a sleep state or an awake state.

[0027] According to the wireless charging device of the present application, a wireless charging device provided with an LC resonant network, an H-bridge inverter, a detection circuit, and a control module can achieve, while controlling the discharge of energy from the LC resonant network of the charged wireless charging device, obtaining an attenuation signal, controlling the charging of the target capacitor of the wireless charging device for a certain period of time, where the certain period of time is the period of a target number of attenuation signals, and controlling the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold. This can convert the method of identifying whether a power-consuming device is connected to the wireless charging device by the resonant frequency into a method of identifying whether a power-consuming device is connected by the voltage of the target capacitor, thereby improving the intuitiveness and accuracy of the wireless charging device's judgment on whether a power-consuming object is connected to the wireless charging device. Based on the judgment result, the wireless charging device can be controlled to enter an awake state or a sleep state accordingly, thereby reducing the power consumption of the wireless charging device and increasing the standby time of the wireless charging device. No additional peripheral electronic components are required, reducing costs and further reducing the overall power consumption of the wireless charging device.

[0028] According to one embodiment of the present application, the detection circuit includes:

[0029] Current source;

[0030] a first switch and the target capacitor connected in series, wherein the first switch is connected to the current source and the target capacitor is grounded;

[0031] A comparator, wherein the first input of the comparator is connected to the end of the target capacitor away from the ground, the second input of the comparator is used to receive a preset voltage threshold, the output of the comparator is connected to the input of the control module; and the first switch is electrically connected to the control module.

[0032] According to one embodiment of the present application, the detection circuit further includes:

[0033] A second switch and a first capacitor are connected in series, the second switch is connected to the current source, the first capacitor is grounded, and the second input terminal of the comparator is connected to the end of the first capacitor away from the ground; the second switch is electrically connected to the control module.

[0034] According to one embodiment of the present application, the control module includes:

[0035] a low-voltage power supply, connected to the LC resonant network, and configured to charge the LC resonant network;

[0036] A controller is electrically connected to the low-voltage power supply and the detection circuit respectively.

[0037] According to one embodiment of the present application, the control module includes:

[0038] The counting module is connected to the controller and the low-voltage power supply respectively.

[0039] According to one embodiment of the present application, the control module includes:

[0040] A shaping circuit is connected to the LC resonant network and the detection circuit respectively, and is used to convert the sinusoidal wave signal generated by the LC resonant network during the energy release process into a square wave signal to obtain an attenuation signal; the attenuation signal has the same frequency as the sinusoidal wave signal.

[0041] In a third aspect, the present application provides a control device for a wireless charging device, comprising:

[0042] A first processing module is configured to obtain an attenuation signal when discharging energy from an LC resonant network of the charged wireless charging device;

[0043] A second processing module, configured to determine a starting time according to a zero-crossing time of the attenuated signal;

[0044] a third processing module, configured to control charging of the target capacitor at the starting moment and terminate charging after a certain time period, wherein the certain time period is a target number of cycles of the attenuation signal;

[0045] The fourth processing module is configured to control the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold; the operating state includes a sleep state or an awake state.

[0046] In a fourth aspect, the present application provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the control method of the wireless charging device as described in the first aspect.

[0047] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0048] By controlling the discharge of energy from the LC resonant network of the charged wireless charging device and controlling the charging cycle duration of a fixed number of attenuation signals on the target capacitor of the wireless charging device, the magnitude of the resonant frequency generated by the LC resonant network corresponding to the powered object and the non-powered object placed in the wireless charging device can be converted into a fixed number of cycle durations, and further converted into a voltage magnitude of the target capacitor under the fixed number of charging cycle durations. As a result, the method of identifying whether a powered device is connected to the wireless charging device through the resonant frequency can be converted into a method of identifying whether a powered device is connected through the voltage magnitude of the target capacitor, thereby improving the intuitiveness and accuracy of the wireless charging device's judgment on whether a powered object is connected to the wireless charging device. Based on the judgment result, the wireless charging device can be controlled to enter a wake-up state or a sleep state, thereby reducing the power consumption of the wireless charging device and increasing the standby time of the wireless charging device. No additional peripheral electronic components are required, thus reducing costs and further reducing the overall power consumption of the wireless charging device.

[0049] Furthermore, by controlling the wireless charging device to enter an awake state when the target voltage is greater than a preset voltage threshold, and controlling the wireless charging device to enter a sleep state when the target voltage is not greater than the preset voltage threshold, it is possible to control the wireless charging device to charge the power consuming object only when the power consuming object is identified, and in other cases, control the wireless charging device to maintain low power consumption operation, thereby reducing the overall operating power consumption of the wireless charging device.

[0050] Furthermore, by controlling the wireless charging device to enter the wake-up state when multiple acquired target voltages are greater than a preset voltage threshold within the first time period, multiple checks can be performed on the recognition results of the wireless charging device for whether the power-consuming object is connected, thereby reducing the risk of wireless charging device recognition errors caused by circuit fluctuations and other reasons.

[0051] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0053] Figure 1 1 is a flow chart of a control method for a wireless charging device provided in an embodiment of the present application;

[0054] Figure 2 is a timing diagram for controlling charging of a target capacitor provided by an embodiment of the present application;

[0055] Figure 3Schematic diagram of the structure of the control device of the wireless charging device provided in an embodiment of the present application;

[0056] Figure 4 This is one of the structural diagrams of the wireless charging device provided in the embodiment of the present application;

[0057] Figure 5 This is the second structural diagram of the wireless charging device provided in the embodiment of the present application;

[0058] Figure 6 This is the third structural diagram of the wireless charging device provided in the embodiment of the present application;

[0059] Figure 7 1 is a flow chart of a control method for a wireless charging device provided in an embodiment of the present application;

[0060] Figure 8 It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0062] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0063] The control method, control device, wireless charging device, electronic device, and readable storage medium of the wireless charging device provided in the embodiments of the present application are described in detail below with reference to specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0064] The control method of the wireless charging device may be applied to a terminal, and may be specifically executed by hardware or software in the terminal.

[0065] The terminal includes but is not limited to portable communication devices such as mobile phones or tablet computers. It should also be understood that in some embodiments, the terminal may not be a portable communication device, but a desktop computer.

[0066] The control method of the wireless charging device provided in the embodiment of the present application can be executed by the wireless charging device or a functional module or functional entity in the wireless charging device that can implement the control method of the wireless charging device. The control method of the wireless charging device provided in the embodiment of the present application is described below using the wireless charging device as an example of the execution entity.

[0067] like Figure 1 As shown, the control method of the wireless charging device includes: step 110, step 120, step 130 and step 140.

[0068] The wireless charging device is a device used to charge an electrical object, such as a wireless charging base or a mobile power supply with wireless charging.

[0069] In an actual charging scenario, the power-consuming object is placed on the wireless charging device, and the wireless charging device charges the power-consuming object when it detects the power-consuming object.

[0070] Among them, electricity-consuming objects may include: mobile phones, tablets, watches or headphones, etc.

[0071] In some cases, a non-power-consuming object, such as a metal foreign object, is placed on the wireless charging device. In this case, the wireless charging device may misjudge it as a power-consuming object and start working, resulting in power loss.

[0072] The control method of the wireless charging device can be used in the field of wireless charging, can distinguish between power-consuming objects and other non-power-consuming objects such as metal foreign objects, and control the working state of the wireless charging device according to the detection results.

[0073] Step 110: Acquire an attenuation signal while discharging energy from the LC resonant network of the charged wireless charging device;

[0074] In this step, the case of discharging energy from the LC resonant network of the charged wireless charging device may include: at the moment of discharging energy from the LC resonant network of the charged wireless charging device, or during the process of discharging energy from the LC resonant network of the charged wireless charging device.

[0075] The LC resonant network is a circuit composed of a resonant capacitor and a main coil in a wireless charging device (wireless charging power transmitter), which is used to achieve a resonant effect at a specific frequency.

[0076] The attenuation signal may be a cycle-by-cycle attenuating sine wave (a resonant wave at a specific frequency) generated when the main coil in the LC resonant network is discharged after being charged.

[0077] like Figure 2 As shown, the attenuated signal floats up and down based on the zero scale line and decays period by period, wherein a period is the time interval between two zero crossings in the attenuated signal.

[0078] During the actual implementation process, the frequency of the attenuation signal generated by the LC resonant network during the charging and discharging process is affected by the physical object placed in the wireless charging device. For example, when there is no physical object in the wireless charging device, the frequency of the attenuation signal generated by the LC resonant network is different from the frequency of the attenuation signal when there is a physical object in the wireless charging device, and the difference is relatively large. Of course, as different physical objects, the frequency of the attenuation signal when the powered object and the non-powered object are placed in the wireless charging device is also different. However, in the actual detection process, the frequency difference of the attenuation signal corresponding to the powered object and the non-powered object is small. If the traditional method is used to detect the frequency change, the power consumption of the wireless charging device will increase.

[0079] Step 120: Determine the starting time according to the zero-crossing time of the attenuated signal;

[0080] In this step, the starting time may be any zero-crossing time of the attenuation signal, which is not limited in this application.

[0081] The starting time is the time for subsequent control to start charging the target capacitance.

[0082] The target capacitor is a capacitor in a detection circuit of the wireless charging device used to detect whether an electric object is connected to the wireless charging device.

[0083] In some embodiments, the starting time can be determined based on the time required for the circuit to reach a stable state. For example, if the circuit reaches a stable state before the third zero-crossing moment of the attenuation signal, the third zero-crossing moment can be determined as the starting time. This can reduce the error caused by circuit fluctuations, thereby improving the accuracy of subsequent control of the target capacitor charging time, and further improving the accuracy of the subsequent wireless charging device's judgment on whether there is an electric object connected to the wireless charging device.

[0084] In some embodiments, the zero-crossing moment of the attenuation signal can be detected by a software program method. For example, the attenuation signal can be detected in real time based on the software program, and each time the attenuation signal is detected to be 0, it is determined as the zero-crossing moment.

[0085] Step 130: Control charging of the target capacitor at the start time and terminate charging after a certain time, where the certain time is the cycle length of the target number of attenuation signals;

[0086] In this step, it can be understood that after obtaining the attenuation signal, charging the target capacitor based on the attenuation signal can start charging the target capacitor at any zero-crossing moment of the attenuation signal, and end charging after continuing to charge for a target number of attenuation signal cycles.

[0087] Among them, the target number can be customized by the user. For example, the target number can be set to 1, 2, 3, 4 or 5, etc. Of course, in other embodiments, the target number can also be set to other values, which is not limited in this application.

[0088] In actual implementation, for the same wireless charging device, the corresponding target quantity should be fixed, and the charging time of the target capacitor is proportional to the cycle time of the attenuation signal.

[0089] It can be understood that the larger the target number, the longer the charging time to the target capacitor, and the greater the difference in target voltage after the target capacitors corresponding to the power-consuming object and the non-power-consuming object are charged, that is, the higher the discrimination, but the power consumption of the wireless charging device is also higher. Therefore, in the actual implementation process, the target number can be determined based on a comprehensive measure of discrimination accuracy and power consumption.

[0090] Step 140: Control the operating state of the wireless charging device based on the target voltage of the target capacitor and the preset voltage threshold.

[0091] In this step, the target voltage is the capacitor voltage after the target capacitor is charged for a certain period of time.

[0092] The preset voltage threshold is a capacitor voltage threshold used to determine whether there is an electric object connected to the wireless charging device.

[0093] In some embodiments, the preset voltage threshold can be customized by the user based on engineering experience. For example, a non-electrical object such as a metal foreign object can be placed in the wireless charging device in advance, and the voltage value of the target capacitor can be obtained multiple times through steps 110 to 120, and then the maximum value or average value is obtained from the multiple voltage values as the preset voltage threshold; the specific voltage value of the preset voltage threshold is not limited here.

[0094] In actual implementation, the preset voltage threshold inside the wireless charging device may be generated by a chip inside the wireless charging device itself, or may be generated by charging another capacitor other than the target capacitor.

[0095] In some embodiments, the preset voltage threshold can also be determined based on the target voltage of the target capacitor obtained last time, that is, the preset voltage threshold is determined as the target voltage of the target capacitor obtained last time, wherein the target voltage of the target capacitor obtained last time is the capacitor voltage after the target capacitor was charged for a certain period of time.

[0096] During the actual implementation process, when the preset voltage threshold is determined based on the target voltage of the target capacitor obtained last time, the working state of the wireless charging device can be controlled by detecting the relative change between the target voltage of the target capacitor obtained this time and the target voltage of the target capacitor obtained last time, thereby reducing the impact of differences caused by mass production.

[0097] From the description of steps 110 to 130, it can be seen that since the frequencies of the attenuation signals corresponding to the power-consuming object and the non-power-consuming object are different, but the target numbers are the same, the charging times of the target capacitors corresponding to the power-consuming object and the non-power-consuming object are different, and the target voltages corresponding to the power-consuming object and the non-power-consuming object are different.

[0098] It should be noted that the longer the target capacitor is charged, the greater the target voltage is.

[0099] It can be understood that in the actual application of the preset voltage threshold, the target voltage of the target capacitor can be compared with the preset voltage threshold to distinguish between power-consuming objects and non-power-consuming objects, that is, to determine whether there is a power-consuming object connected to the wireless charging device, and then based on the judgment result, the working state of the wireless charging device can be controlled.

[0100] The working state includes a sleep state or a wake-up state.

[0101] The sleep state is a state in which the wireless charging device operates with low power consumption.

[0102] The awake state is a state in which the wireless charging device is charging the power-consuming object.

[0103] During the actual execution process, when there is a power-consuming object connected to the wireless charging device, the wireless charging device is controlled to enter a wake-up state to charge the power-consuming object; when there is no power-consuming object connected to the wireless charging device, the wireless charging device is controlled to enter a sleep state to reduce the power consumption of the wireless charging device.

[0104] It is understandable that the relationship between the target voltage and the preset voltage threshold is different, and the corresponding results of determining whether there is an electric object connected to the wireless charging device are different, and the corresponding working state of the wireless charging device is different.

[0105] In some embodiments, step 140 may include:

[0106] When the target voltage is greater than a preset voltage threshold, determining that a power-consuming device is connected to the wireless charging device and controlling the wireless charging device to enter a wake-up state;

[0107] When the target voltage is not greater than the preset voltage threshold, it is determined that no power-consuming device is connected to the wireless charging device, and the wireless charging device is controlled to enter a dormant state.

[0108] In this embodiment, during actual application, the frequency of the attenuation signal corresponding to the electrical object is lower than the frequency of the attenuation signal corresponding to the non-electrical object, that is, the period duration of the attenuation signal corresponding to the electrical object is greater than the period duration of the attenuation signal of the non-electrical object. Then, the period duration of the attenuation signal corresponding to the target number of electrical objects, that is, the charging time of the target capacitor, is greater than the charging time of the target capacitor corresponding to the non-electrical object.

[0109] It can be understood that when the power-consuming object and the non-power-consuming object charge the target capacitance based on the corresponding charging time respectively, the target voltage corresponding to the power-consuming object after charging is greater than the target voltage corresponding to the non-power-consuming object.

[0110] During the actual implementation process, by setting a preset voltage threshold, it is possible to distinguish between power-consuming objects and non-power-consuming objects based on the size of the target voltage. When the target voltage is greater than the preset voltage threshold, it is considered that there is a power-consuming object connected to the wireless charging device. When the target voltage is not greater than the preset voltage threshold, it is considered that there is no power-consuming object connected to the wireless charging device.

[0111] Then, when the target voltage is greater than the preset voltage threshold, the wireless charging device is controlled to enter the awake state to charge the power-consuming object connected to the wireless charging device. When the target voltage is not greater than the preset voltage threshold, the wireless charging device is controlled to enter the sleep state to reduce power consumption.

[0112] According to the control method of the wireless charging device provided in the embodiment of the present application, by controlling the wireless charging device to enter the awake state when the target voltage is greater than the preset voltage threshold, and controlling the wireless charging device to enter the sleep state when the target voltage is not greater than the preset voltage threshold, it is possible to control the wireless charging device to charge the power consuming object only when the power consuming object is identified, and in other cases, control the wireless charging device to maintain low power consumption operation, thereby reducing the overall operating power consumption of the wireless charging device.

[0113] During the research and development process, the inventors discovered that in related technologies, wireless charging devices can also distinguish whether the wireless charging device is connected to the power consumer by detecting changes in the resonant frequency, or by simultaneously detecting changes in the Q value and the resonant frequency. However, the detection of changes in the resonant frequency requires a clock source with a frequency higher than the resonant frequency, and the power consumption of the precise clock source is generally linearly related to the clock frequency under the same design architecture. Therefore, the power consumption of the precise clock source cannot meet the low standby current requirements of the wireless charging device; in some embodiments, the wireless charging device and the power consumer can be identified through NFC communication with the power consumer, or the power consumer can be detected by using a touch chip to wake up the wireless charging device, but this will add additional circuits, resulting in an increase in overall cost.

[0114] In the present application, an attenuation signal is obtained when the LC resonant network of the charged wireless charging device is discharged. The starting time of controlling the charging of the target capacitor is determined according to the zero-crossing time of the attenuation signal. At this starting time, the target capacitor of the wireless charging device is controlled to be charged for a certain time, wherein the certain time is the cycle time of a target number of attenuation signals. The working state of the wireless charging device is controlled based on the target voltage of the target capacitor after charging and the preset voltage threshold. In this way, the resonant frequency (the frequency of the attenuation signal) generated by the LC resonant network corresponding to the power-consuming object and the non-power-consuming object placed in the wireless charging device can be converted into a fixed number of cycle time, and then further converted into the voltage of the target capacitor under the fixed number of charging cycle time, thereby identifying whether there is a power-consuming device connected to the wireless charging device by the resonant frequency. , converted into a method of identifying whether there is an electric device connected by the voltage size of the target capacitor, wherein, since the resonant frequencies of the attenuation signals corresponding to the electric object and the non-electric object are different, the attenuation signals corresponding to the electric object and the non-electric object control the charging time of the target capacitor at different times, then the sizes of the target voltages corresponding to the electric object and the non-electric object are different, so that the electric object and the non-electric object can be identified and distinguished based on the preset voltage threshold, thereby improving the intuitiveness and accuracy of the wireless charging device in identifying the electric device connection judgment; and when the electric object or the non-electric object is identified, the wireless charging device can be controlled to enter the awakening state or the sleep state accordingly, thereby reducing the power consumption of the wireless charging device and increasing the standby time of the wireless charging device; and no additional peripheral electronic components are required, thereby reducing costs and further reducing the overall power consumption of the wireless charging device.

[0115] In some embodiments, step 140 may include:

[0116] In the first time period, when multiple acquired target voltages are all greater than a preset voltage threshold, the wireless charging device is controlled to enter a wake-up state.

[0117] In this embodiment, the first time period is a time period during which the target voltage can be obtained multiple times.

[0118] During the actual implementation process, the first duration can be customized by the user, and this application does not limit it here.

[0119] It can be understood that S target voltages can be obtained within the first time period, and if K target voltages among the S target voltages obtained are greater than the preset voltage threshold, the wireless charging device is controlled to enter the wake-up state, where S and K are both positive integers greater than 1, and K is less than or equal to S.

[0120] For example, within the first time period, when a target voltage greater than a preset voltage threshold is obtained for the first time, the wireless charging device is controlled to remain in a sleep state. When a target voltage greater than the preset voltage threshold is obtained again, the wireless charging device is controlled to enter a wake-up state to charge the power-consuming object.

[0121] In the actual implementation process, by obtaining multiple target voltages to identify whether there is an electric object connected to the wireless charging device, the risk of wireless charging device identification errors caused by circuit fluctuations and other reasons can be reduced.

[0122] According to the control method of the wireless charging device provided in the embodiment of the present application, by controlling the wireless charging device to enter the awake state when multiple acquired target voltages are greater than a preset voltage threshold within a first time period, multiple checks can be performed on the wireless charging device to identify whether the power user is connected, thereby reducing the occurrence of wireless charging device recognition errors caused by circuit fluctuations and other reasons.

[0123] In some embodiments, after controlling the operating state of the wireless charging device based on the target voltage of the target capacitor and the preset voltage threshold, the method may further include:

[0124] Control the discharge of the target capacitor.

[0125] In this embodiment, discharging the target capacitor can facilitate accurate acquisition of the target voltage of the target capacitor next time.

[0126] According to the control method of the wireless charging device provided in the embodiment of the present application, after controlling the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold, the discharge of the target capacitor is controlled. This allows the target capacitor to be charged from zero the next time the wireless charging device detects whether an electric object is connected to the wireless charging device, thereby improving the accuracy and reliability of the target voltage of the target capacitor obtained in each detection.

[0127] In some embodiments, step 110 may include:

[0128] When discharging energy from the LC resonant network of the charged wireless charging device, a sine wave signal generated by the LC resonant network is obtained;

[0129] The sine wave signal is converted into a square wave signal to obtain an attenuated signal; the attenuated signal has the same frequency as the sine wave signal.

[0130] In this embodiment, it is understandable that the attenuation signal may also be a square wave signal converted from a sinusoidal wave signal generated during the charging and discharging process of the LC resonant network.

[0131] like Figure 2 As shown, in some embodiments, the sine wave signal is converted into a square wave signal: when the sine wave signal is greater than 0, the square wave signal is logic 1 (high level); when the sine wave signal is less than or equal to 0, the square wave signal is logic 0 (low level).

[0132] In the actual implementation process, when the attenuation signal is a square wave signal with the same frequency as the sine wave signal, the zero-crossing moment of the attenuation signal detected based on the software program can be converted into the rising edge moment and falling edge moment of the attenuation signal detected based on the hardware structure (circuit).

[0133] For example, the starting time of charging the target capacitor can be determined as the Mth rising edge moment or falling edge moment of the attenuation signal. When the Mth rising edge moment or falling edge moment of the attenuation signal is detected, the charging of the target capacitor is controlled, and the charging is ended after the M+Nth rising edge moment or falling edge moment is detected, where M and N are both positive integers.

[0134] According to the control method for a wireless charging device provided in an embodiment of the present application, a sine wave signal generated by the LC resonant network of the charged wireless charging device is obtained while discharging energy from the LC resonant network. The sine wave signal is converted into a square wave signal to obtain an attenuation signal. This facilitates detection of the zero-crossing moment, i.e., the rising and falling edge moments, of the attenuation signal based on a hardware structure (digital circuit), thereby facilitating subsequent control of the charging duration of the target capacitor to the cycle duration of a target number of attenuation signals, thereby improving the flexibility and adaptability of detecting the attenuation signal.

[0135] In some embodiments, discharging energy from the LC resonant network of the charged wireless charging device may include:

[0136] Based on the target detection period, the LC resonant network is charged for a second time period;

[0137] After the LC resonant network is charged for the second time period, the LC resonant network is discharged.

[0138] In this embodiment, the target detection period is the time interval between two consecutive detections of whether a power-consuming object is connected to the wireless charging device.

[0139] The target detection period can be customized by the user. For example, the target detection period can be set to 400ms, 500ms or 600ms, that is, a detection is triggered every 400ms, 500ms or 600ms, etc. Of course, in other embodiments, the target detection period can also be set to other durations, which can be determined based on the sensitivity of the device performing timing in the wireless charging device and the power consumption of the wireless charging device (the shorter the target detection period, the more sensitive the detection, but the relatively greater the power consumption). This application is not limited here.

[0140] The second duration is the charging duration of the LC resonant network, which can be customized by the user based on engineering experience and is not limited in this application.

[0141] In an actual implementation process, after controlling the charging of the LC resonant network, the LC resonant network is controlled to discharge energy, thereby generating an attenuation signal for controlling the charging time of the target capacitor.

[0142] According to the control method of the wireless charging device provided in the embodiment of the present application, by charging the LC resonant network for a second period of time based on the target detection period, and then discharging the LC resonant network after charging the LC resonant network for the second period of time, it is possible to trigger detection based on a certain time interval whether there is a power-consuming object connected to the wireless charging device, thereby increasing the standby time of the wireless charging device and enabling the wireless charging device to autonomously switch its working state, reducing the risk of failure of the wireless charging device, and improving the safety of the wireless charging device.

[0143] The control method of the wireless charging device provided in the embodiment of the present application can be executed by the control device of the wireless charging device. In the embodiment of the present application, the control device of the wireless charging device is used as an example to illustrate the control method of the wireless charging device provided in the embodiment of the present application.

[0144] In some embodiments, the present application also provides a control device for a wireless charging device.

[0145] like Figure 3 As shown, the control device of the wireless charging device includes: a first processing module 310 , a second processing module 320 , a third processing module 330 and a fourth processing module 340 .

[0146] A first processing module 310 is configured to obtain an attenuation signal when discharging energy from an LC resonant network of a charged wireless charging device;

[0147] The second processing module 320 is used to determine the starting time according to the zero-crossing time of the attenuation signal;

[0148] The third processing module 330 is used to control charging of the target capacitor at the start time and end the charging after a certain time period, where the certain time period is the period of the target number of attenuation signals;

[0149] The fourth processing module 340 is configured to control the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold; the operating state includes a sleep state or a wake-up state.

[0150] According to the control device of the wireless charging device provided in the embodiment of the present application, by controlling the charging of the target capacitor of the wireless charging device for a fixed number of attenuation signal cycles while controlling the discharge of energy from the LC resonant network of the charged wireless charging device, the resonant frequency generated by the LC resonant networks corresponding to the powered and non-powered objects placed in the wireless charging device can be converted into a fixed number of cycles, and then further converted into a voltage of the target capacitor during the fixed number of charging cycles. This converts the method of identifying whether a powered device is connected to the wireless charging device based on the resonant frequency into a method of identifying whether a powered device is connected based on the voltage of the target capacitor, thereby improving the intuitiveness and accuracy of the wireless charging device's determination of whether a powered device is connected to the wireless charging device. Based on the determination result, the wireless charging device can be controlled to enter an awake state or a sleep state accordingly, thereby reducing the power consumption of the wireless charging device and increasing the standby time of the wireless charging device. No additional peripheral electronic components are required, reducing costs and further reducing the overall power consumption of the wireless charging device.

[0151] In some embodiments, the first processing module 310 may also be used to:

[0152] When discharging energy from the LC resonant network of the charged wireless charging device, a sine wave signal generated by the LC resonant network is obtained;

[0153] The sine wave signal is converted into a square wave signal to obtain an attenuated signal; the attenuated signal has the same frequency as the sine wave signal.

[0154] In some embodiments, the first processing module 310 may also be used to:

[0155] Based on the target detection period, the LC resonant network is charged for a second time period;

[0156] After the LC resonant network is charged for the second time period, the LC resonant network is discharged.

[0157] In some embodiments, the fourth processing module 340 may also be used to:

[0158] When the target voltage is greater than a preset voltage threshold, determining that a power-consuming device is connected to the wireless charging device and controlling the wireless charging device to enter a wake-up state;

[0159] When the target voltage is not greater than the preset voltage threshold, it is determined that no power-consuming device is connected to the wireless charging device, and the wireless charging device is controlled to enter a dormant state.

[0160] In some embodiments, the fourth processing module 340 may also be used to:

[0161] In the first time period, when multiple acquired target voltages are all greater than a preset voltage threshold, the wireless charging device is controlled to enter a wake-up state.

[0162] The control device of the wireless charging device in the embodiment of the present application can be an electronic device or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices other than a terminal.

[0163] The control device of the wireless charging device in the embodiment of the present application can be a device having an operating system. The operating system can be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0164] The control device of the wireless charging device provided in the embodiment of the present application can achieve Figure 1 To avoid repetition, the various processes implemented in the method embodiment are not described here.

[0165] An embodiment of the present application also provides a wireless charging device.

[0166] like Figure 4 As shown, in this embodiment, the wireless charging device includes: an LC resonant network, an H-bridge inverter, a detection circuit and a control module.

[0167] Among them, the LC resonant network is a circuit composed of a resonant capacitor and a main coil in a wireless charging device, which is used to achieve a resonant effect at a specific frequency.

[0168] The LC resonant network includes a resonant capacitor and a main coil.

[0169] The H-bridge inverter is connected to an LC resonant network and is a power electronic circuit used to convert direct current (DC) into alternating current (AC).

[0170] A target capacitance is provided within the detection circuit.

[0171] The target capacitance is used to detect whether an electric object is connected to the wireless charging device.

[0172] The detection circuit is configured to charge the target capacitor for a certain period of time when discharging the charged LC resonant network. The certain period of time is the period of a target number of attenuation signals. The attenuation signal is generated by the LC resonant network during the discharging process.

[0173] The input end of the control module is connected to the output end of the detection circuit, and is used to control the H-bridge inverter to charge or discharge the LC resonant network, and control the working state of the wireless charging device based on the output signal of the detection circuit.

[0174] The working state includes a sleep state or a wake-up state.

[0175] The output signal of the detection circuit may be a comparison result between a target voltage after the target capacitor is charged for a certain period of time and a preset voltage threshold.

[0176] The preset voltage threshold is a capacitance voltage threshold used to determine whether there is an electricity-consuming object connected to the wireless charging device.

[0177] During actual implementation, the control module controls the lower transistors of the second and first arms of the H-bridge to turn on, thereby enabling the charging and discharging of the LC resonant network. While the LC resonant network is discharging energy, the main coil in the LC resonant network generates a cycle-by-cycle attenuating sine wave (attenuation signal). The detection circuit charges the target capacitor for a certain period of time based on the attenuation signal. The control module receives the output signal of the detection circuit and, based on this output signal, controls the operating state of the wireless charging device.

[0178] In some embodiments, the H-bridge inverter and the control module may also be integrated into the same chip.

[0179] In some embodiments, the control module may also be used to adjust the output power of the H-bridge inverter, communicate with the power-consuming object, and enter sleep mode to reduce power consumption when no work is required.

[0180] According to the wireless charging device provided in the embodiments of the present application, the wireless charging device, which is provided with an LC resonant network, an H-bridge inverter, a detection circuit, and a control module, can achieve the goal of obtaining an attenuation signal while controlling the discharge of energy from the LC resonant network of the charged wireless charging device, charging the target capacitor of the wireless charging device for a certain period of time, where the certain period of time is equal to the period of a target number of attenuation signal cycles, and controlling the operating state of the wireless charging device based on a target voltage of the target capacitor and a preset voltage threshold. This can convert the method of identifying whether a power consumer is connected to the wireless charging device by using the resonant frequency into a method of identifying whether a power consumer is connected by using the voltage of the target capacitor, thereby improving the intuitiveness and accuracy of the wireless charging device's determination of whether a power consumer is connected to the wireless charging device. Based on the determination result, the wireless charging device can be controlled to enter an awake state or a sleep state accordingly, thereby reducing the power consumption of the wireless charging device and increasing the standby time of the wireless charging device. No additional peripheral electronic components are required, thus reducing costs and further reducing the overall power consumption of the wireless charging device.

[0181] like Figure 5 As shown, in some embodiments, the detection circuit may include:

[0182] Current source;

[0183] a first switch and a target capacitor connected in series, the first switch being connected to a current source, and the target capacitor being grounded;

[0184] A comparator, wherein a first input terminal of the comparator is connected to an end of the target capacitor away from the ground, a second input terminal of the comparator is used to receive a preset voltage threshold, and an output terminal of the comparator is connected to an input terminal of the control module.

[0185] In this embodiment, a current source is used to charge the target capacitance.

[0186] The comparator is used to compare the target voltage of the target capacitor with a preset voltage threshold.

[0187] The first switch is electrically connected to the control module.

[0188] like Figure 5As shown, during actual implementation, the control module can control the H-bridge inverter to discharge energy from the LC resonant network while determining the starting time and charging duration (a certain duration in the above method embodiment) for charging the target capacitor C0 based on the attenuation signal generated by the LC resonant network. The control module generates a rising edge and a high-level duration of the first control signal SW0 based on the determined starting time and charging duration, respectively, and controls the on and off of the first switch S0 using the first control signal SW0. During the high-level time of the first control signal SW0, the first switch is configured to be in the on state. When the first switch is in the on state, the current source DC charges the target capacitor C0. The comparator compares the target voltage of the target capacitor C0 received at the first input terminal with the preset voltage threshold Vref received at the second input terminal, and outputs a comparison result. The control module then receives the output signal (comparison result) of the comparator, thereby controlling the operating state of the wireless charging device based on the output signal.

[0189] In which, when the target voltage is greater than the preset voltage threshold Vref, the output of the comparator is 1; when the target voltage is not greater than the preset voltage threshold Vref, the output of the comparator is 0.

[0190] According to the wireless charging device provided in the embodiments of the present application, a detection circuit including a current source, a first switch and a target capacitor connected in series, and a comparator can control the charging duration of the target capacitor based on the attenuation signal generated during the discharge of the LC resonant network, and compare the target voltage of the target capacitor with a preset voltage threshold, thereby improving the reliability of the wireless charging device in detecting the connection of a power consumer.

[0191] like Figure 6 As shown, in some embodiments, the detection circuit may further include:

[0192] The second switch and the first capacitor are connected in series, the second switch is connected to the current source, the first capacitor is grounded, and the second input end of the comparator is connected to the end of the first capacitor away from the ground; the second switch is electrically connected to the control module.

[0193] In this embodiment, when the detection circuit includes a second switch and a first capacitor connected in series, and the second switch is connected to the current source and the control module respectively, the preset voltage threshold received by the second input terminal of the comparator can be generated based on the first capacitor.

[0194] like Figure 6 As shown, in the actual implementation process, the second control signal SW1 for controlling the closing moment and closing time of the second switch Sref can be generated based on the control module to control the duration of charging the first capacitor Cref based on the current source DC, thereby controlling the capacitor voltage of the first capacitor Cref, so that the capacitor voltage of the first capacitor Cref is equivalent to Figure 5 The preset voltage threshold Vref in.

[0195] The method for generating the second control signal SW1 is not limited in this application, and it only needs to enable the capacitor voltage of the first capacitor Cref to reach a preset voltage threshold.

[0196] According to the wireless charging device provided in the embodiment of the present application, by providing a detection circuit including a second switch and a first capacitor connected in series, a preset voltage threshold can be generated based on controlling the capacitor voltage of the first capacitor, thereby providing multiple methods for obtaining the preset voltage threshold using a comparator, thereby improving the flexibility and applicability of the wireless charging device in detecting the connection of a power consumer.

[0197] like Figure 5 or Figure 6 As shown, in some embodiments, the detection circuit may include:

[0198] A third switch and a discharge resistor are connected in series, the third switch is connected to an end of the target capacitor away from the ground, and the discharge resistor is grounded; and the third switch is electrically connected to the control module.

[0199] In this embodiment, when the third switch is closed, the discharge resistor is used to discharge the target capacitor.

[0200] like Figure 5 As shown, in the actual implementation process, a third control signal SW2 for controlling the closing moment and closing time of the third switch S2 can be generated based on the control module, wherein the high level time of the third control signal SW2 is the closing time of the third switch S2; the rising edge of the third control signal SW2, that is, the closing moment of the third switch S2 can be the moment after the control module controls the working state of the wireless charging device based on the target voltage of the target capacitor and the preset voltage threshold.

[0201] According to the wireless charging device provided in the embodiment of the present application, by providing a detection circuit having a third switch and a discharge resistor connected in series, it is possible to discharge the target capacitor after charging the target capacitor to obtain a target voltage, so as to facilitate the acquisition of the next target voltage, thereby improving the logic and safety of the wireless charging device in detecting the connection of an electric object.

[0202] In some embodiments, the control module may include:

[0203] A low-voltage power supply is connected to the LC resonant network and is used to charge the LC resonant network;

[0204] The controller is electrically connected to the low-voltage power supply and the detection circuit respectively.

[0205] In this embodiment, the low voltage power supply may be a low voltage LDO (Low Dropout Regulator).

[0206] In actual execution, the controller (such as Figure 4 The main control MCU in the wireless charging device can control the low-voltage power supply to charge the LC resonant network, receive the output signal of the detection circuit, and then control the working state of the wireless charging device based on the output signal.

[0207] According to the wireless charging device provided in the embodiment of the present application, a control module including a low-voltage power supply and a controller can be provided. The controller can control the low-voltage power supply to charge the LC resonant network. Furthermore, the controller can control the operating state of the wireless charging device based on the output signal of the detection circuit, thereby improving the reliability of the control module in the wireless charging device's detection of power consumer access.

[0208] In some embodiments, the control module may include:

[0209] The counting module is connected to the controller and the low-voltage power supply respectively.

[0210] In this embodiment, the counting module is used to count target detection cycles.

[0211] The target detection period is the time interval between two consecutive detections of whether a power-consuming object is connected to the wireless charging device.

[0212] In some embodiments, the counting module may be a low-frequency counter.

[0213] During the actual execution process, when the counting module is a low-frequency counter, the counting module can count down when the wireless charging device enters the sleep state based on the interval time between two detections of whether there is an electric object connected to the wireless charging device set in the target detection cycle. When the counter count value is 0, a detection is triggered and the counter is reset, and the cycle is repeated.

[0214] According to the wireless charging device provided in the embodiment of the present application, a control module provided with a counting module can realize triggering based on a target detection cycle to detect whether there is a power-consuming object connected to the wireless charging device, thereby increasing the standby time of the wireless charging device and enabling the wireless charging device to autonomously switch the working state, reducing the risk of failure of the wireless charging device and improving the safety of the wireless charging device.

[0215] In some embodiments, the control module may include:

[0216] The shaping circuit is connected to the LC resonant network and the detection circuit respectively, and is used to convert the sine wave signal generated by the LC resonant network during the energy release process into a square wave signal to obtain an attenuated signal; the attenuated signal has the same frequency as the sine wave signal.

[0217] In this embodiment, the attenuation signal may also be a square wave signal converted from a sinusoidal wave signal generated during the charging and discharging process of the LC resonant network.

[0218] like Figure 2 As shown, in the actual execution process, the shaping circuit sets the square wave signal to logic 1 (high level) when the sine wave signal is greater than 0; and sets the square wave signal to logic 0 (low level) when the sine wave signal is less than or equal to 0.

[0219] According to the wireless charging device provided in the embodiments of the present application, a control module equipped with a shaping circuit can convert the sinusoidal wave signal generated by the LC resonant network during the energy discharge process into a square wave signal to obtain an attenuation signal. This facilitates the detection of the zero-crossing moment, i.e., the rising and falling edge moments, of the attenuation signal based on the hardware structure (digital circuit), thereby facilitating the subsequent control of the charging duration of the target capacitor to the cycle duration of a target number of attenuation signals, thereby improving the flexibility and adaptability of detecting the attenuation signal.

[0220] The control logic of the wireless charging device within a detection cycle is described below.

[0221] like Figure 7 As shown, in the actual execution process, before the control module enters sleep mode, the counting module is enabled. Taking the low-frequency counter as an example, when the count value of the low-frequency counter becomes 0, a power-consuming object access detection is triggered; the control module controls the opening of the lower tube of the second bridge arm of the H-bridge inverter, and uses a low-voltage power supply to continuously charge the LC resonant network for 3ms (this time generally refers to the time it takes for the capacitor of the LC resonant network to be charged to saturation. In this application, the LC resonant network can be directly discharged when it is not charged to saturation and enter the next stage; this time can be modified through a register), and then controls the opening of the lower tube of the first bridge arm of the H-bridge inverter. When the lower tube of the first bridge arm of the H-bridge inverter is turned on, a cycle-by-cycle attenuating sine wave is generated on the main coil in the LC resonant network; the sine wave is generated by the LC The output end of the resonant network is transmitted to the shaping circuit, which converts the sine wave into a square wave signal with the same frequency as the sine wave; when the control module detects the Sth rising edge or falling edge of the square wave signal, it opens the first switch of the detection circuit, and the current source continues to charge the target capacitor; when the control module detects the S+Kth rising edge or falling edge of the square wave signal, it closes the first switch. At this time, if the target voltage of the target capacitor is higher than the preset voltage threshold, the comparator output is 1, and it is considered that there is an electric object connected to the wireless charging device, and the wireless charging device is controlled to enter the awake state; otherwise, the wireless charging device is controlled to enter the sleep state; after completing one electric object connection detection, the control module controls the closing of the third switch to discharge the target capacitor based on the discharge resistor.

[0222] In some embodiments, as Figure 8 As shown, an embodiment of the present application further provides an electronic device 800, including a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the program is executed by the processor 801, each process of the control method embodiment of the above-mentioned wireless charging device is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0223] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0224] The embodiment of the present application further provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the above-mentioned control method embodiment of the wireless charging device are implemented, and the same technical effects can be achieved. To avoid repetition, they are not described here.

[0225] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0226] An embodiment of the present application further provides a computer program product, including a computer program, which implements the control method of the wireless charging device when executed by a processor.

[0227] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0228] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned control method embodiment of the wireless charging device, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0229] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0230] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0231] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of this application.

[0232] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

[0233] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0234] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and purpose of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A control method for a wireless charging device, characterized in that: include: Acquire an attenuation signal when discharging energy from an LC resonant network of the charged wireless charging device; Determining a starting time according to the zero-crossing time of the attenuated signal; Controlling charging of a target capacitor in a detection circuit of the wireless charging device at the starting moment and ending the charging after a certain time period, wherein the certain time period is a target number of cycle durations of the attenuation signal, and the charging time period of the target capacitor is proportional to the cycle duration of the attenuation signal; Based on the target voltage of the target capacitor and a preset voltage threshold, the working state of the wireless charging device is controlled; the working state includes a dormant state or an awake state.

2. The control method of the wireless charging device according to claim 1, characterized in that: The controlling the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold includes: When the target voltage is greater than the preset voltage threshold, determining that a power-consuming device is connected to the wireless charging device, and controlling the wireless charging device to enter the awake state; When the target voltage is not greater than the preset voltage threshold, it is determined that no power-consuming device is connected to the wireless charging device, and the wireless charging device is controlled to enter the sleep state.

3. The control method of the wireless charging device according to claim 1, characterized in that: The controlling the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold includes: In a first time period, when multiple acquired target voltages are all greater than the preset voltage threshold, the wireless charging device is controlled to enter the awake state.

4. The control method of a wireless charging device according to any one of claims 1 to 3, characterized in that: The step of obtaining an attenuation signal when discharging energy from the LC resonant network of the charged wireless charging device includes: When discharging energy from an LC resonant network of the charged wireless charging device, obtaining a sinusoidal wave signal generated by the LC resonant network; The sinusoidal wave signal is converted into a square wave signal to obtain the attenuated signal; the attenuated signal has the same frequency as the sinusoidal wave signal.

5. The control method of a wireless charging device according to any one of claims 1 to 3, characterized in that: The step of discharging energy from the LC resonant network of the charged wireless charging device includes: Based on the target detection period, charging the LC resonant network for a second time period; After the LC resonant network is charged for a second period of time, the LC resonant network is discharged.

6. The control method of a wireless charging device according to any one of claims 1 to 3, characterized in that: The preset voltage threshold is determined according to a target voltage of the target capacitor obtained last time.

7. A wireless charging device, characterized in that: include: LC resonant network; An H-bridge inverter connected to the LC resonant network; a detection circuit, wherein a target capacitor is provided therein; the detection circuit is configured to charge the target capacitor for a certain time period when the charged LC resonant network is discharged, the certain time period being a cycle time period of a target number of attenuation signals, the charging time period of the target capacitor being proportional to the cycle time period of the attenuation signal, the attenuation signal being generated by the LC resonant network during the discharge of energy; A control module, wherein an input end of the control module is connected to the output end of the detection circuit, and is used to control the H-bridge inverter to charge or discharge the LC resonant network, and control the operating state of the wireless charging device based on the output signal of the detection circuit; the operating state includes a sleep state or an awake state.

8. The wireless charging device according to claim 7, wherein: The detection circuit comprises: Current source; a first switch and the target capacitor connected in series, wherein the first switch is connected to the current source and the target capacitor is grounded; A comparator, wherein the first input of the comparator is connected to the end of the target capacitor away from the ground, the second input of the comparator is used to receive a preset voltage threshold, the output of the comparator is connected to the input of the control module; and the first switch is electrically connected to the control module.

9. The wireless charging device according to claim 8, wherein: The detection circuit further includes: A second switch and a first capacitor are connected in series, the second switch is connected to the current source, the first capacitor is grounded, and the second input terminal of the comparator is connected to the end of the first capacitor away from the ground; the second switch is electrically connected to the control module.

10. The wireless charging device according to any one of claims 7 to 9, characterized in that: The control module includes: a low-voltage power supply, connected to the LC resonant network, and configured to charge the LC resonant network; A controller is electrically connected to the low-voltage power supply and the detection circuit respectively.

11. The wireless charging device according to claim 10, wherein: The control module includes: The counting module is connected to the controller and the low-voltage power supply respectively.

12. The wireless charging device according to claim 10, wherein: The control module includes: A shaping circuit is connected to the LC resonant network and the detection circuit respectively, and is used to convert the sinusoidal wave signal generated by the LC resonant network during the energy release process into a square wave signal to obtain an attenuation signal; the attenuation signal has the same frequency as the sinusoidal wave signal.

13. A control device for a wireless charging device, characterized in that: include: A first processing module is configured to obtain an attenuation signal when discharging energy from an LC resonant network of the charged wireless charging device; A second processing module, configured to determine a starting time according to a zero-crossing time of the attenuated signal; a third processing module, configured to control charging of a target capacitor in the detection circuit of the wireless charging device at the starting moment and terminate the charging after a predetermined time period, wherein the predetermined time period is a target number of cycle durations of the attenuation signal, and the charging time period of the target capacitor is proportional to the cycle duration of the attenuation signal; The fourth processing module is configured to control the operating state of the wireless charging device based on the target voltage of the target capacitor and a preset voltage threshold; the operating state includes a sleep state or an awake state.

14. A chip, characterized in that: The chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the control method of the wireless charging device according to any one of claims 1 to 6.

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