Wireless charging method, device and storage medium

Abstract

Embodiments of the present application disclose a wireless charging method, device, and storage medium. The method includes: detecting charging parameters of a converter during wireless charging; wherein the charging parameters include at least one parameter of input current, input voltage, output current, and output voltage; determining a target operating mode based on the charging parameters; wherein the target operating mode is used to determine a load removal mode of the converter; controlling the converter to switch to the target operating mode, and charging the device to be charged according to the target operating mode.

Description

Technical Field

[0001] The present invention relates to the field of wireless charging technology, and in particular to a wireless charging method, device and storage medium. Background Art

[0002] Typically, during charging, the DC / DC converter on a wireless charging device powers the inverter unit in constant voltage (CV) or constant power (CP) mode, and draws power from the front-end adapter in CP or constant current (CC) mode. In this case, the front-end adapter must operate in CV mode to ensure stable operation of the wireless charging device.

[0003] However, if the rated power of the adapter is not high enough, the wireless charging device may experience charging interruptions when increasing the charging power. If the rated power of the adapter is increased, the adapter power will be wasted during the charging process. Therefore, the existing wireless charging methods have low intelligence and poor stability. Summary of the Invention

[0004] The embodiments of the present application provide a wireless charging method, device, and storage medium to solve the problems in the related art.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a wireless charging method, the method comprising:

[0007] During wireless charging, detecting charging parameters of the converter; wherein the charging parameters include at least one parameter of input current, input voltage, output current, and output voltage;

[0008] Determining a target operating mode based on the charging parameters; wherein the target operating mode is used to determine a load removal mode of the converter;

[0009] The converter is controlled to switch to the target operating mode to charge the device to be charged based on the target operating mode.

[0010] In a second aspect, an embodiment of the present application provides a wireless charging device, the wireless charging device comprising: a processor, a memory storing instructions executable by the processor, and a detection module.

[0011] The detection module is used to detect charging parameters of the converter during wireless charging; wherein the charging parameters include at least one parameter of input current, input voltage, output current and output voltage;

[0012] The processor is configured to determine a target operating mode based on the charging parameters, wherein the target operating mode is used to determine a load removal mode of the converter; and control the converter to switch to the target operating mode to charge the device to be charged based on the target operating mode.

[0013] In a third aspect, an embodiment of the present application provides a wireless charging device, which includes: a wireless charging transmitting unit, a converter, and an inverter unit; the wireless charging device is used to implement the wireless charging method described in the first aspect.

[0014] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a program stored thereon, which is applied to a wireless charging device. When the program is executed by a processor, the wireless charging method as described in the first aspect is implemented.

[0015] Embodiments of the present application provide a wireless charging method, apparatus, and storage medium. During wireless charging, the wireless charging apparatus detects charging parameters of a converter, wherein the charging parameters include at least one of input current, input voltage, output current, and output voltage. Based on the charging parameters, a target operating mode is determined, wherein the target operating mode is used to determine a load-removal method for the converter. The converter is then controlled to switch to the target operating mode and charge the device according to the target operating mode. Specifically, in embodiments of the present application, the DC / DC converter of the wireless charging apparatus can be controlled to operate in different load-removal modes, such as CV and CP, based on the voltage and current used by the wireless charging apparatus to charge the device and the voltage and current provided by the adapter to the wireless charging apparatus, to ensure a stable charging process. When the DC / DC converter operates in the CP load-removal mode, the charging power is controlled by the DC / DC converter, and the adapter can provide sufficient power to meet the charging requirements of the wireless charging apparatus for the terminal device. When the DC / DC converter operates in the CV load-removal mode, the charging power is controlled by the adapter, and the adapter is no longer required to provide maximum charging power, thus preventing charging interruptions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a wireless charging system;

[0017] Figure 2 A schematic diagram of a wireless charging method;

[0018] Figure 3 Schematic diagram of the implementation process of the wireless charging method proposed in this application embodiment Figure 1 ;

[0019] Figure 4 Schematic diagram of the implementation process of the wireless charging method proposed in this application embodiment Figure 2 ;

[0020] Figure 5 This is a schematic diagram of wireless charging in the embodiment of this application. Figure 1 ;

[0021] Figure 6 This is a schematic diagram of wireless charging in the embodiment of this application. Figure 2 ;

[0022] Figure 7 This is a schematic diagram of the working mode of a common wireless charging device;

[0023] Figure 8 Indication for wireless charging Figure 1 ;

[0024] Figure 9 Indication for wireless charging Figure 2 ;

[0025] Figure 10 Indication for wireless charging Figure 3 ;

[0026] Figure 11 This is a diagram of the working mode control during charging. Figure 1 ;

[0027] Figure 12 Schematic diagram of working mode control during charging Figure 2 ;

[0028] Figure 13 Schematic diagram of the structure of the wireless charging device proposed in this embodiment Figure 1 ;

[0029] Figure 14 Schematic diagram of the structure of the wireless charging device proposed in this embodiment Figure 2 . DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. It should be understood that the specific embodiments described herein are only used to explain the related applications and are not intended to limit the applications. It should also be noted that for ease of description, only the portions relevant to the related applications are shown in the drawings.

[0031] In the prior art, Figure 1 A schematic diagram of a wireless charging system is shown in FIG. Figure 1As shown, the wireless charging system 10 includes a power supply device 110, a wireless charging apparatus 120 and a device to be charged 130, wherein the power supply device 110 may be, for example, an adapter, the wireless charging apparatus 120 may be, for example, a wireless charging base, and the device to be charged 130 may be, for example, a terminal.

[0032] After the power supply device 110 is connected to the wireless charging apparatus 120 , the output voltage and output current of the power supply device 110 may be transmitted to the wireless charging apparatus 120 .

[0033] The wireless charging device 120 can convert the output voltage and output current of the power supply device 110 into a wireless charging signal (electromagnetic signal) for transmission through the internal wireless charging transmitter unit 121. For example, the wireless charging transmitter unit 121 can convert the output current of the power supply device 110 into alternating current (AC) and convert the AC into a wireless charging signal via a transmitting coil or transmitting antenna.

[0034] The device to be charged 130 can receive the wireless charging signal transmitted by the wireless charging transmitting unit 121 through the wireless charging receiving unit 131, and convert the wireless charging signal into the output voltage and output current of the wireless charging receiving unit 131. For example, the wireless charging receiving unit 131 can convert the wireless charging signal transmitted by the wireless charging transmitting unit 121 into alternating current through a receiving coil or a receiving antenna, and perform operations such as rectification and / or filtering on the alternating current to convert the alternating current into the output voltage and output current of the wireless charging receiving unit 131.

[0035] Wireless charging (wireless power) technology originates from wireless energy transmission technology. Currently, wireless charging functions are becoming more and more popular, and charging power is also getting higher and higher. Correspondingly, wireless charging devices are also becoming more and more popular, and the power is also getting higher and higher. At the same time, the requirements for adapters that power wireless charging devices are also getting higher and higher. For example, the current wireless charging power of mobile phones has reached 80W, and the power of the matching adapter needs to be above 100W. In addition, at this stage, the wireless charging power of mainstream domestic brand mobile phone manufacturers is generally around 40W to 60W, and generally uses adapters with a rated power far greater than the wireless charging power for matching charging.

[0036] Figure 2 A schematic diagram of a wireless charging method is shown in FIG. Figure 2As shown, the wireless charging device 120 receives a fixed voltage from a direct current (DC) power supply device 110. The DC / DC converter 122 scales the fixed voltage and applies the scaled fixed voltage to the inverter 123. The inverter 123 can be, for example, a direct current-alternating current (DC-AC) inverter, which is used to convert a direct current voltage (Vsdc) into an alternating current voltage (Vsac). The inverter 123, together with the transmitter matching network, generates an alternating current (AC) current in the transmitter coil. The AC current in the transmitter coil generates an oscillating magnetic field according to Ampere's law. The oscillating magnetic field induces an AC voltage into the tuned receiver coil (located in the device to be charged 130) according to Faraday's law.

[0037] DC / DC stands for direct current to direct current (DC / DC conversion). If a converter can convert a DC voltage (3.0V) to another DC voltage (1.5V or 5.0V), it can be called a DC / DC converter, a switching power supply, or a switching regulator.

[0038] Generally, during the charging process, the DC / DC converter on the wireless charging device supplies power to the inverter unit in constant voltage (CV) mode or constant power (CP) mode, and obtains power from the front-end adapter in CP mode or constant current (CC) mode. At this time, the front-end adapter needs to operate in CV mode to ensure the stable operation of the wireless charging device. This requires that the rated power of the adapter must be greater than the maximum peak power obtained by the wireless charging device, otherwise there will be problems with charging interruption or even failure to charge. However, as the charging process continues, the battery level of the mobile phone gradually increases, the charging power gradually decreases, and the adapter enters light load mode, and its charging capacity is far from being fully utilized.

[0039] Specifically, as the charging power of smart terminal products increases, the corresponding adapter output power is also increasing. However, since most terminal products reduce the charging power after a period of charging, the power demand of the adapter will gradually decrease. If the rated power of the adapter is designed to be the maximum power required by the terminal product, it will inevitably result in significant waste, that is, the output capacity of the adapter is far from being fully utilized.

[0040] On the other hand, because wireless charging devices operate in CC or CP mode and the wireless charging system is less efficient, the adapter must have a higher rated output power to ensure the device can deliver the maximum peak power to charge the terminal device. If the adapter's rated power is insufficient, the wireless charging device may experience intermittent charging or even no charging at all when increasing the charging power.

[0041] In common wireless charging methods, if the adapter's rated power is insufficient, the wireless charging device may experience charging interruptions when increasing the charging power. Increasing the adapter's rated power wastes adapter power during charging. This suggests that existing wireless charging methods lack intelligence and stability.

[0042] In order to solve the above problems, the present application proposes a wireless charging method that can control the DC / DC converter of the wireless charging device to operate in different extraction modes such as CV and CP, and can seamlessly switch between different working modes such as CV and CP. Based on the charging power provided by the wireless charging device to the terminal device and the charging power provided by the adapter to the wireless charging device, the switching between these three modes is seamlessly completed during the charging process to ensure a stable charging process. When the DC / DC works in the CP extraction mode, the charging power is controlled by the DC / DC. At this time, the adapter can provide sufficient power to meet the needs of the wireless charging device to charge the terminal device.

[0043] Specifically, in the embodiments of the present application, the DC / DC converter of the wireless charging device can be controlled to operate in different load-drawing modes, such as CV and CP, based on the voltage and current used by the wireless charging device to charge the device to be charged, and the voltage and current provided by the adapter to the wireless charging device, during the charging process to ensure a stable charging process. When the DC / DC converter operates in the CP load-drawing mode, the charging power is controlled by the DC / DC converter, and the adapter can provide sufficient power to meet the charging requirements of the wireless charging device for the terminal device. When the DC / DC converter operates in the CV load-drawing mode, the charging power is controlled by the adapter, and the adapter is no longer required to provide maximum charging power, thus preventing charging interruptions.

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0045] An embodiment of the present application provides a wireless charging method. Figure 3 Schematic diagram of the implementation process of the wireless charging method proposed in this application embodiment Figure 1 ,like Figure 3 As shown, in an embodiment of the present application, a method for wireless charging by a wireless charging device may include the following steps:

[0046] Step 101: Detect charging parameters of a converter during wireless charging; wherein the charging parameters include at least one of input current, input voltage, output current, and output voltage.

[0047] In an embodiment of the present application, the wireless charging device may first detect charging parameters corresponding to the converter during wireless charging, where the charging parameters include at least one of input current, input voltage, output current, and output voltage. Specifically, the wireless charging device may detect one or more of the converter's input current, input voltage, output current, and output voltage.

[0048] Furthermore, in an embodiment of the present application, the wireless charging device may be configured with a converter, wherein, during wireless charging, the wireless charging device may convert a DC voltage into another DC voltage through the converter, that is, the converter configured for the wireless charging device may be a DC / DC converter.

[0049] It should be noted that in the embodiments of the present application, the wireless charging device may be a component of a wireless charging system. Specifically, the wireless charging system may further include a device to be charged and a power supply device. The power supply device may be used to charge the wireless charging device, and the wireless charging device may wirelessly charge the device to be charged by establishing a wireless connection with the device to be charged. For example, the power supply device may be an adapter, a power supply, or other device, the wireless charging device may be a charging base, or other device, and the device to be charged may be a mobile phone, a game console, or other device.

[0050] Specifically, in the present application, the device to be charged can be any terminal with communication and storage functions, such as: tablet computers, mobile phones, e-readers, remote controls, personal computers (PCs), laptops, vehicle-mounted equipment, Internet TVs, wearable devices, personal digital assistants (PDAs), portable media players (PMPs), navigation devices, and other terminals.

[0051] It should be noted that the power supply device provides power to the wireless charging device. At the same time, wireless communication technology is used between the wireless charging device and the device to be charged to charge the battery in the device to be charged through electromagnetic induction.

[0052] Furthermore, in the implementation of the present application, before the device to be charged performs wireless charging, it may first establish a wireless connection with the wireless charging device and perform two-way communication to achieve wireless charging.

[0053] It should be noted that, in the embodiments of the present application, the power supply device and the device to be charged may also establish wireless communication, thereby enabling bidirectional transmission of data.

[0054] Furthermore, in an embodiment of the present application, a power supply device can be used to charge a wireless charging device. Specifically, the power supply device and the wireless charging device can be connected via a Universal Serial Bus (USB) interface, which can be a regular USB interface, a micro USB interface, or a Type C interface. The power line in the USB interface is used by the power supply device to charge the wireless charging device, wherein the power line in the USB interface can be the VBus line and / or the ground line in the USB interface. The data line in the USB interface is used for bidirectional communication between the power supply device and the wireless charging device, and the data line can be the D+ line and / or the D- line in the USB interface. Bidirectional communication can refer to information exchange between the power supply device and the wireless charging device.

[0055] Furthermore, in an embodiment of the present application, the power supply device can support a normal charging mode and a fast charging mode, wherein the charging current of the fast charging mode is greater than the charging current of the normal charging mode, that is, the charging speed of the fast charging mode is greater than the charging speed of the normal charging mode.

[0056] Specifically, in this application, the power supply device can be connected to the converter in the wireless charging device. Therefore, the voltage output by the power supply device to the wireless charging device in real time is the input voltage of the converter. Specifically, the wireless charging device can use the converter to convert the voltage output by the power supply device in real time, i.e., the input voltage of the converter, to obtain and provide the output voltage.

[0057] Accordingly, in the present application, since the power supply device is connected to the converter in the wireless charging device, the current output by the power supply device to the wireless charging device in real time is the input current of the converter.

[0058] Furthermore, in an embodiment of the present application, when the power supply device wirelessly charges the wireless charging apparatus, the output mode of the power supply device may be a constant current CC mode or a constant voltage CV mode.

[0059] CC mode means the power supply outputs a constant current to provide a stable current. Specifically, when the power supply operates in CC mode, the output voltage increases with increasing output power and decreases with decreasing output power to ensure a stable current.

[0060] CV mode means the power supply outputs a constant voltage to provide a stable voltage. Specifically, when the power supply operates in CV mode, the output current increases with increasing output power and decreases with decreasing output power to ensure a stable output voltage.

[0061] Furthermore, in an embodiment of the present application, when the power supply device wirelessly charges the wireless charging device, the load extraction mode of the wireless charging device may be a constant current CC mode, a constant power CP mode, a constant voltage CV mode, or the like.

[0062] CC mode means the wireless charger operates at a constant current draw to ensure a stable current. Specifically, when the wireless charger operates in CC mode, if the power required by the device to be charged increases, the voltage drawn by the wireless charger increases; if the power required by the device to be charged decreases, the voltage drawn by the wireless charger decreases.

[0063] CV mode means the wireless charging device operates at a constant voltage to achieve a stable voltage. Specifically, when the wireless charging device operates in CV mode and the rated power provided by the power supply can meet the maximum power required by the wireless charging device to wirelessly charge the device, to ensure a stable voltage, the current drawn by the wireless charging device increases if the power required by the device increases, and decreases if the power required by the device decreases.

[0064] CP mode involves the wireless charging device operating in constant power draw to ensure stable power. Specifically, when the wireless charging device operates in CP mode and the power supply device operates in CV mode, to ensure stable power, the current drawn by the wireless charging device increases if the power required by the device to be charged increases, and decreases if the power required by the device to be charged decreases.

[0065] Furthermore, in an embodiment of the present application, the wireless charging device can detect the input current, the input voltage, the output current and the output voltage through a control circuit set by the converter; or, the wireless charging device can also detect the input current, the input voltage, the output current and the output voltage through a controller.

[0066] That is, in this application, the wireless charging device can use a variety of methods to detect charging parameters such as the converter's input current, input voltage, output current, and output voltage. Specifically, the wireless charging device can monitor and collect charging parameters directly through the converter or through a configured controller. This application does not specifically limit this.

[0067] For example, in the present application, a control circuit may be provided inside the DC / DC converter, and the control circuit may detect the charging parameters of the DC / DC converter.

[0068] For example, in the present application, the wireless charging device may further be configured with a controller outside the DC / DC converter, and the controller may detect the charging parameters of the DC / DC converter.

[0069] Step 102: Determine a target operating mode based on the charging parameters; wherein the target operating mode is used to determine a load removal mode of the converter.

[0070] In an embodiment of the present application, after detecting charging parameters of the converter, including at least one parameter such as input current, input voltage, output current, and output voltage, the wireless charging device may further determine a target operating mode based on the charging parameters.

[0071] It can be understood that in this application, the target operating mode is the load extraction mode determined by the converter in the wireless charging device to adapt to the charging parameters, wherein the target operating mode may include but is not limited to any of the following load extraction modes: CC mode, CV mode, CP mode, and fixed resistance CR mode.

[0072] For example, in an embodiment of the present application, the extraction mode is the mode in which the wireless charging device obtains power from the power supply device. For example, when the target working mode is the CP mode, the extraction mode of the converter is determined to be the same power mode, that is, the converter extracts power from the power supply device at a constant power, and when the voltage provided by the power supply device increases, the current consumed by the converter decreases accordingly, and when the voltage provided by the power supply device decreases, the current consumed by the converter increases accordingly to ensure constant power; when the target working mode is the CV mode, the extraction mode of the converter is determined to be the same voltage mode, that is, the converter extracts power from the power supply device at a constant voltage, and when the current provided by the power supply device increases, the power obtained by the converter increases accordingly. When the current provided by the power supply device decreases, the power obtained by the converter decreases accordingly; when the target operating mode is CC mode, the load extraction mode of the converter is determined to be the same current mode, that is, the converter extracts power from the power supply device according to a constant current. When the voltage provided by the power supply device decreases, the power obtained by the converter decreases accordingly. When the voltage provided by the power supply device increases, the power obtained by the converter increases accordingly. When the target operating mode is CR mode, the load extraction mode of the converter is determined to be the constant voltage-to-current ratio mode, that is, the converter extracts power from the power supply device according to a constant voltage-to-current ratio.

[0073] It should be noted that in the embodiments of the present application, for different charging periods, the charging power that the wireless charging device needs to provide to the device to be charged is different. Accordingly, for different charging periods, the charging parameters detected by the wireless charging device are also different. Therefore, the target operating mode determined based on charging parameters such as input current, input voltage, output current and output voltage will vary with the change of charging time.

[0074] Optionally, in the present application, when the wireless charging device determines the target operating mode based on charging parameters including at least one parameter such as input current, input voltage, output current and output voltage, it can first determine the real-time charging power based on the output current and the output voltage; if the real-time charging power is less than a preset power threshold, the target operating mode is determined to be a fixed power CP mode.

[0075] Specifically, in the present application, the wireless charging device can first determine the charging power for wireless charging of the device to be charged, that is, the real-time charging power, based on the detected output current and output voltage, and then compare the real-time charging power with a preset threshold, that is, the preset power threshold, so as to determine the target operating mode of the converter corresponding to the charging parameters based on the comparison result.

[0076] It should be noted that, in the present application, the preset power threshold may be a specific value pre-set by the wireless charging device for selecting the operating mode of the converter. For example, the wireless charging device may set the preset power threshold according to the peak charging power corresponding to the device to be charged, for example, setting the preset power threshold equal to the peak charging power, or setting the preset power threshold equal to 1 / 2 of the peak charging power.

[0077] For example, in the present application, at the initial stage of charging, if the output current detected by the wireless charging device is 1A and the output voltage is 5V, the real-time charging power of the wireless charging device is relatively small, which is 5W. The power provided by the power supply device can meet the charging needs of the wireless charging device at this time. The output mode of the power supply device is CV mode. Accordingly, the wireless charging device can determine that the target operating mode of the converter is CP mode.

[0078] That is to say, in this application, in the initial stage of charging, the charging power provided by the wireless charging device to the device to be charged is relatively small, and the power that the power supply device can provide can meet the needs of the wireless charging device to wirelessly charge the device to be charged. At this time, the power supply device operates in the CV output mode, and the DC / DC converter of the wireless charging device operates in the CP unloading mode.

[0079] Optionally, in the present application, when the wireless charging device determines the target operating mode based on the charging parameters including at least one parameter such as input current, input voltage, output current and output voltage, it can first determine the charging power provided by the power supply device based on the input current and input voltage, that is, the real-time input power, and at the same time can determine the real-time charging power based on the output current and output voltage; if the real-time charging power is equal to the real-time input power, and the real-time charging power is equal to the power upper limit value, the target operating mode is determined to be the CP mode.

[0080] Specifically, in the present application, the wireless charging device can determine the charging power for wireless charging of the device to be charged, that is, the real-time charging power, based on the detected output current and output voltage. At the same time, it can also determine the charging power transmitted by the power supply device, that is, the real-time input power, based on the detected input current and input voltage. The real-time charging power is then compared with the real-time input power, and the real-time charging power is compared with the pre-set power upper limit value, so as to determine the target operating mode of the converter corresponding to the charging parameters based on the comparison results.

[0081] It should be noted that in this application, the power limit value can be the maximum power value of the wireless charging device to charge the device to be charged, that is, the charging peak power corresponding to the device to be charged. For example, the maximum power value of the device to be charged during wireless charging, that is, the power limit value is 65W (10V / 6.5A).

[0082] For example, in the present application, as the charging time increases, the wireless charging device enters the fast charging period. At this time, the real-time charging power of the wireless charging device is increased to the upper limit of the power, which is 65W. If the power provided by the power supply device can meet the charging demand of the wireless charging device at this time, that is, the power supply device can also provide a charging power of 65W in a short time, then the output mode of the power supply device is CV mode. Accordingly, the wireless charging device can determine that the target operating mode of the converter is CP mode.

[0083] That is to say, in this application, for the fast charging period, the charging power provided by the wireless charging device to the device to be charged reaches the peak power, that is, the real-time charging power is equal to the power upper limit value. If the power provided by the power supply device can also meet the needs of the wireless charging device to wirelessly charge the device to be charged, then the power supply device operates in the CV output mode, and the DC / DC converter of the wireless charging device operates in the CP load extraction mode.

[0084] Furthermore, in the embodiments of the application, Figure 4 Schematic diagram of the implementation process of the wireless charging method proposed in this application embodiment Figure 2 ,like Figure 4 As shown, before the wireless charging device determines the target operating mode according to the charging parameters, that is, before step 102, the method for wireless charging by the wireless charging device may further include the following steps:

[0085] Step 104 : Determine the historical input current, historical input voltage, historical output current, and historical output voltage of the converter.

[0086] In an embodiment of the present application, the wireless charging device can continuously detect charging parameters of the converter, including at least one parameter such as input current, input voltage, output current, and output voltage, so as to obtain the charging parameters corresponding to the converter at each moment. In particular, compared to the input current, input voltage, output current, and output voltage, the charging parameters detected at the last moment are the historical input current, historical input voltage, historical output current, and historical output voltage.

[0087] It should be noted that in embodiments of the present application, the wireless charging device can detect charging parameters in real time and store the detected charging parameters. Specifically, the wireless charging device detects charging parameters including input current, input voltage, output current, and output voltage at adjacent first and second times t1 (t2 being greater than t1), and can store the input current, input voltage, output current, and output voltage corresponding to the first time t1 as historical input current, historical input voltage, historical output current, and historical output voltage, and use the input current, input voltage, output current, and output voltage corresponding to the second time t2 as real-time charging parameters. At the next consecutive time, such as a third time t3 (t3 being greater than t2), after detecting charging parameters including input current, input voltage, output current, and output voltage, the charging parameters corresponding to the second time t2 can be overwritten with the charging parameters corresponding to the first time t1, i.e., the input current, input voltage, output current, and output voltage corresponding to the second time t2 are stored as historical input current, historical input voltage, historical output current, and historical output voltage, and the input current, input voltage, output current, and output voltage corresponding to the third time t3 are real-time charging parameters.

[0088] Optionally, in the present application, when the wireless charging device determines the target operating mode based on the charging parameters including at least one parameter such as input current, input voltage, output current and output voltage, it can first determine the charging power provided by the power supply device based on the input current and input voltage, that is, the real-time input power, and at the same time determine the real-time charging power based on the output current and output voltage; if the real-time charging power is greater than or equal to the real-time input power, and the historical input voltage is greater than the input voltage, then the target operating mode can be determined as the constant voltage CV mode.

[0089] Specifically, in the present application, the wireless charging device can determine the charging power for wireless charging of the device to be charged, that is, the real-time charging power, based on the detected output current and output voltage. At the same time, it can also determine the charging power transmitted by the power supply device, that is, the real-time input power, based on the detected input current and input voltage. The real-time charging power is then compared with the real-time input power, and the historical input voltage is compared with the input voltage, so as to determine the target operating mode of the converter corresponding to the charging parameters based on the comparison results.

[0090] It should be noted that in this application, if the historical input voltage is greater than the input voltage, it can be considered that the power supply device cannot provide sufficient power to the wireless charging device. In order to ensure its own stable operation, the power supply device switches from CV output mode to CC output mode.

[0091] For example, in the present application, as the charging time increases, the wireless charging device enters the fast charging period, and the real-time charging power of the wireless charging device needs to be gradually increased to the power upper limit value, which is 65W. Assuming that the real-time charging power of the wireless charging device is increased to 60W at this time, if the power provided by the power supply device cannot meet the charging demand of the wireless charging device at this time, that is, the rated power of the power supply device cannot reach 65W, or even cannot reach 60W, then in order to maintain its own stable operation, the power supply device will switch the output mode from CV mode to CC mode. Accordingly, the wireless charging device can determine that the target operating mode of the converter is CV mode.

[0092] That is to say, in this application, for the fast charging period, the charging power provided by the wireless charging device to the device to be charged reaches the peak power, that is, the real-time charging power is equal to the power upper limit value. If the power provided by the power supply device cannot meet the demand of the wireless charging device to wirelessly charge the device to be charged, that is, the rated power of the power supply device is less than the power upper limit value, then the power supply device needs to switch from CV output mode to CC output mode, and the DC / DC converter of the wireless charging device operates in CV unloading mode.

[0093] Accordingly, in the present application, during the fast charging period, the charging power provided by the wireless charging device to the device to be charged gradually increases toward the peak power, that is, the real-time charging power is less than or equal to the upper power limit. If the power provided by the power supply device cannot meet the requirements of the wireless charging device for wireless charging of the device to be charged, that is, the rated power of the power supply device is less than the real-time charging power, then the power supply device needs to switch from the CV output mode to the CC output mode, and the DC / DC converter of the wireless charging device operates in the CV unloading mode.

[0094] For example, in the present application, as the charging time increases, the wireless charging device enters a stable period. At this time, the real-time charging power of the wireless charging device is increased to the upper power limit of 65W. After the power supply device meets the charging needs of the wireless charging device at 65W for a period of time, it can no longer provide the maximum power and needs to enter a power reduction period, that is, it needs to reduce the power to ensure its own stable operation. Therefore, the output mode will be switched from CV mode to CC mode. Accordingly, the wireless charging device can determine that the target operating mode of the converter is CV mode.

[0095] That is to say, in the present application, for the stable period, the charging power provided by the wireless charging device to the device to be charged reaches the peak power, that is, the real-time charging power is equal to the power upper limit value. If the power provided by the power supply device can meet the demand of the wireless charging device to wirelessly charge the device to be charged, and after providing power to the wireless charging device based on the power upper limit value for a period of time, the power supply device needs to enter a power reduction period and switch from the CV output mode to the CC output mode. The DC / DC converter of the wireless charging device operates in the CV load withdrawal mode.

[0096] It should be noted that in the embodiment of the present application, when the target operating mode of the wireless charging device is the CV mode, that is, the DC / DC converter operates in the CV load extraction mode, the wireless charging device no longer forcibly obtains the maximum power to be provided to the device to be charged from the power supply device, but instead hands over the control of the charging power to the power supply device, that is, the device to be charged is charged according to the charging power that the power supply device can provide. At this time, the DC / DC converter of the wireless charging device is used for power transmission.

[0097] Optionally, in the present application, when the wireless charging device determines the target operating mode based on the charging parameters including at least one parameter such as input current, input voltage, output current and output voltage, if the historical output current is greater than the output current and the historical input current is greater than the input current, then the target operating mode can be determined as the CP mode.

[0098] Specifically, in the present application, the wireless charging device can compare the output current with the historical output current, and compare the historical input current with the input current, so as to determine the target operating mode of the converter corresponding to the charging parameters according to the comparison results.

[0099] It should be noted that in this application, if the historical input current is greater than the input current and the historical output current is greater than the output current, it can be considered that the charging power required by the device to be charged is gradually reduced, and the power supply device can provide sufficiently large power to the wireless charging device to meet the needs of the wireless charging device to wirelessly charge the device to be charged. Then the power supply device operates in the CV output mode, and the DC / DC converter of the wireless charging device operates in the CP unloading mode.

[0100] For example, in the present application, as the charging time increases, the wireless charging device enters the fast charging exit period. If the historical output current corresponding to the converter is 5A, the output current is 1A, that is, the output current is less than the historical output current, and the historical input current is 8A, the output current is 4A, that is, the input current is less than the historical input current, it can be considered that the charging power provided by the wireless charging device to the device to be charged is gradually decreasing, so the charging current output by the wireless charging device is continuously decreasing, and accordingly, the load power of the wireless charging device is also gradually decreasing, then the output mode of the power supply device is CV mode, and accordingly, the wireless charging device can determine that the target operating mode of the converter is CP mode.

[0101] That is to say, in this application, during the fast charging exit period, as the power level of the device to be charged gradually increases, the power provided by the power supply device can meet the needs of the wireless charging device to wirelessly charge the device to be charged. Then the power supply device operates in the CV output mode, and the DC / DC converter of the wireless charging device operates in the CP unloading mode.

[0102] Step 103: Control the converter to switch to the target operating mode, and charge the device to be charged according to the target operating mode.

[0103] In an embodiment of the present application, after determining a target operating mode based on charging parameters including at least one parameter such as input current, input voltage, output current, and output voltage, the wireless charging device can control the converter to switch to the target operating mode and then charge the device to be charged according to the target operating mode.

[0104] Optionally, in the present application, if it is determined that the target operating mode corresponding to the converter is the CP mode, then after controlling the converter to switch to the CP mode, the wireless charging device can first determine the real-time input power based on the input current and the input voltage during the process of charging the device to be charged according to the target operating mode; then determine the real-time input power as the target charging power, and charge the device to be charged according to the target charging power.

[0105] Optionally, in the present application, if it is determined that the target operating mode corresponding to the converter is the CV mode, then after controlling the converter to switch to the CV mode, the wireless charging device can first determine the real-time input power as the target charging power, and at the same time determine the input voltage as the target charging voltage during the process of charging the device to be charged according to the target operating mode; then the device to be charged can be charged according to the target charging power and the target charging voltage.

[0106] In summary, the wireless charging method proposed in steps 101 to 104 can, by controlling the operating mode of a converter (such as a DC / DC converter) in a wireless charging device, reduce the demand for the rated power of the power supply device. That is, the rated power of the power supply device is no longer required to be greater than the peak power during the wireless charging process. For example, when the DC / DC converter operates in the CV load withdrawal mode, the power supply device is allowed to actively reduce power, thereby solving the problem of intermittent charging or even failure to charge when the power supply device cannot provide sufficient power. On the other hand, the power supply device is allowed to operate at peak power for a short period of time to power the device to be charged through the wireless charging device. For example, when the DC / DC converter operates in the CP load withdrawal mode, the output power of the power supply device can be increased to the rated power, thereby fully utilizing the charging capacity of the power supply device.

[0107] That is to say, in view of the current situation that many adapters on the market can operate at peak power for a short time, but the rated power is less than the peak power, taking into account that the time for charging devices represented by mobile phones and other terminals to be charged is also very short in the high-power charging state, once the power is up, the charging power will drop significantly. The wireless charging method proposed in the embodiment of the present application can match the charging parameters of the DC / DC converter with different working modes. By controlling the working mode of the DC / DC converter, the capacity of the adapter can be fully utilized, so that the adapter can do its best to meet the needs of the wireless charging device to charge the device to be charged; at the same time, under the premise of ensuring that the charging power of the device to be charged is met, it is no longer required that the rated power of the adapter must be greater than the peak charging power of the device to be charged, that is, for adapters with insufficient rated power, they can also be charged normally.

[0108] Furthermore, in an embodiment of the present application, the converter's target operating mode can also be CR mode. That is, the wireless charging device can adjust the converter's load extraction method to operate in CR mode, making the converter a "controlled resistor" for the front-end power supply unit. This ensures that the converter's charging voltage and charging current are as closely aligned as possible, and when used in conjunction with the front-end circuit of applications such as DCX, a higher power factor (PF) value can be achieved.

[0109] It can be understood that in the embodiments of the present application, the DC / DC converter can exist in various forms, including but not limited to Buck circuit, Boost circuit, Buck-Boost circuit, Flybuck, etc., among which the DC / DC converter mainly completes the connection and conversion function between the front-stage power supply and the rear-stage power receiving unit.

[0110] An embodiment of the present application provides a wireless charging method. During wireless charging, a wireless charging device detects charging parameters of a converter, wherein the charging parameters include at least one of input current, input voltage, output current, and output voltage. A target operating mode is determined based on the charging parameters, wherein the target operating mode is used to determine a load-reduction method for the converter. The converter is then controlled to switch to the target operating mode and charge the device according to the target operating mode. Specifically, in the embodiment of the present application, the DC / DC converter of the wireless charging device can be controlled to operate in different load-reduction modes, such as CV and CP, based on the voltage and current used by the wireless charging device to charge the device and the voltage and current provided by the adapter to the wireless charging device, to ensure a stable charging process. When the DC / DC converter operates in the CP load-reduction mode, the charging power is controlled by the DC / DC converter, and the adapter can provide sufficient power to meet the charging requirements of the wireless charging device for the terminal device. When the DC / DC converter operates in the CV load-reduction mode, the charging power is controlled by the adapter, and the adapter is no longer required to provide maximum charging power, thereby preventing charging interruptions.

[0111] Based on the above embodiment, in yet another embodiment of the present application, Figure 5 This is a schematic diagram of wireless charging in the embodiment of this application. Figure 1 , Figure 6 This is a schematic diagram of wireless charging in the embodiment of this application. Figure 2 ,like Figure 5 and Figure 6 As shown, the wireless charging system 20 in the embodiment of the present application includes: a power supply device 210, a wireless charging apparatus 220 and a device to be charged 230.

[0112] For example, in an embodiment of the present application, a power supply device 210 is used to provide power to a wireless charging device 220. The power supply device 210 may include a rectifier circuit, a transformer circuit, a control circuit, and a charging interface, and may convert AC input into DC output for supply to the wireless charging device 220. For example, the power supply device may be an adapter, a power bank, or a vehicle power supply.

[0113] Furthermore, in embodiments of the present application, the power supply device 210 can also directly provide AC power to the wireless charging device 220. For example, the power supply device 210 can be an AC power supply. When the power supply device 210 is an AC power supply, the wireless charging device 220 also includes circuits or modules for converting AC power to DC power, such as a rectifier and filter circuit and a DC / DC converter.

[0114] The wireless charging device 220 is used to convert the direct current or alternating current provided by the power supply device 210 into an electromagnetic signal for wireless power transmission.

[0115] Furthermore, as mentioned above Figure 4 As shown, in the embodiment of the present application, the wireless charging device 220 may include a DC / DC converter 221, a wireless charging transmitting unit 222 and a detection module 223. Those skilled in the art will understand that Figure 2 The composition structure of the wireless charging apparatus 220 shown in the figure does not constitute a limitation on the wireless charging device. The wireless charging device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0116] It should be noted that the power supply device 210 can be a common adapter, a voltage-regulated adapter (i.e., the adapter itself can adjust the output voltage), or even a mobile power supply. Here, the DC / DC converter 221 is used to perform direct current / direct current (DC / DC) voltage conversion, adjusting the output voltage of the power supply device 210 to a fixed voltage value and providing it to the wireless charging transmitting unit 222.

[0117] For example, in the present application, the DC / DC converter 221 can be a boost conversion circuit, a buck conversion circuit, a buck-boost conversion circuit or a Flybuck converter, etc., and the embodiments of the present application are not specifically limited.

[0118] The wireless charging transmitting unit 222 is used to convert the direct current provided by the DC / DC converter 221 or the direct current provided by the power supply device 210 into alternating current that can be coupled to the transmitting coil, and convert the alternating current into an electromagnetic signal for transmission through the transmitting coil.

[0119] In an embodiment of the present application, the wireless charging transmitting unit 222 may include: an inverter unit and a resonant unit. The inverter unit may include multiple switching tubes, and the magnitude of the transmission power may be adjusted by controlling the conduction time (i.e., duty cycle) of the switching tubes. The resonant unit is used to transmit electrical energy. For example, the resonant unit may include a capacitor and a transmitting coil. By adjusting the operating frequency of the resonant unit, the magnitude of the transmission power of the wireless charging transmitting unit 222 can be adjusted.

[0120] In an embodiment of the present application, the wireless charging device 220 may be a wireless charging base or a device with an energy storage function, etc. When the wireless charging device 220 is a device with an energy storage function, it also includes an energy storage module (for example, a lithium battery 233), which can obtain electrical energy from an external power supply device 210 and store it. Thus, the energy storage module can provide electrical energy to the wireless charging transmitting unit 222. Those skilled in the art will understand that the wireless charging device 220 can obtain electrical energy from the external power supply device 210 in a wired or wireless manner. Among them, the wired manner, for example, is to connect to the power supply device 210 through a charging interface (for example, a Type-C interface or a USB interface, etc.) to obtain electrical energy. The wireless manner, for example, the wireless charging device 220 may also include a wireless charging receiving unit 231, which can obtain electrical energy from a device with a wireless charging function in a wireless manner.

[0121] Detection module 223 can be used to control the wireless charging process. Specifically, detection module 223 can perform real-time detection of at least one of the charging parameters of DC / DC converter 221, such as input current, input voltage, output current, and output voltage, thereby enabling real-time monitoring of the charging parameters of DC / DC converter 221. The real-time monitoring function of detection module 223 can be implemented through the internal control circuit of DC / DC converter 221 or through an external controller.

[0122] For example, in this application, Figure 5 As shown, the detection module 223 may be a control circuit configured inside the DC / DC converter 221 , and the control circuit may simultaneously detect the charging parameters of the DC / DC converter 221 .

[0123] For example, in this application, Figure 6 As shown, the detection module 223 can be a controller configured inside the wireless charging device 220. The controller monitors the charging parameters (such as input voltage, current and other information) and then controls the DC / DC converter 221 to implement CC, CV, CP, and CR functions.

[0124] Those skilled in the art will appreciate that the wireless charging device 220 may also include other related hardware, logic devices, units, and / or codes to implement corresponding functions. For example, the wireless charging device 220 may also include a display unit (e.g., a light-emitting diode or LED display) for displaying the charging status (e.g., charging in progress or terminated) in real time during the wireless charging process. This is not specifically limited in the embodiments of the present application.

[0125] In the embodiments of the present application, as described above Figure 2As shown, the device to be charged 230 includes a wireless charging receiving unit 231, a charging management module 232, and a battery 233. Those skilled in the art will understand that Figure 4 and Figure 5 The composition structure of the device to be charged 230 shown in the figure does not constitute a limitation on the device to be charged. The device to be charged may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0126] It should be noted that the power supply device 210 provides power to the wireless charging device 220. The device to be charged 230 is placed on the surface of the wireless charging device 220. The wireless charging device 220 charges the battery 233 in the device to be charged 230 through electromagnetic induction. Here, a wireless connection is established between the wireless charging device 220 and the device to be charged 230, and the two can also communicate with each other.

[0127] In the embodiments of the present application, wireless communication methods include, but are not limited to, Bluetooth communication, Wireless Fidelity (WiFi) communication, short-range wireless communication based on high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communication, and mobile communication, etc. The embodiments of the present application are not specifically limited.

[0128] The wireless charging receiving unit 231 is used to convert the electromagnetic signal transmitted by the wireless charging transmitting unit 222 of the wireless charging device 220 into alternating current through a receiving coil, and perform operations such as rectification and / or filtering on the alternating current to convert the alternating current into stable direct current to be provided to the battery 233 for charging.

[0129] In the embodiment of the present application, the wireless charging receiving unit 231 includes: a receiving coil and an AC / DC conversion unit. The AC / DC conversion unit is configured to convert the alternating current (AC) received by the receiving coil into direct current (DC).

[0130] In the embodiments of the present application, battery 233 may include a single cell or multiple cells. When battery 233 includes multiple cells, the multiple cells are connected in series. This allows battery 233 to withstand a charging voltage equal to the sum of the charging voltages of the multiple cells, which can increase charging speed and reduce heat generation during charging.

[0131] In the embodiment of the present application, the charging management module 232 is configured to perform voltage boosting or voltage reduction processing on the direct current output by the wireless charging receiving unit 231 .

[0132] Figure 7 This is a schematic diagram of the working mode of a common wireless charging device, such as Figure 7As shown, currently common wireless charging devices mainly control the output to operate in CV mode, and do not control the input load mode of the DC / DC converter. That is, the power supply device charges the wireless charging device in the CV output working mode, and the wireless charging device also charges the device to be charged in the CV output working mode.

[0133] It should be noted that, compared to the currently common solution of not controlling the DC / DC converter in a wireless charging device, the embodiments of the present application add CV, CC, and CP load-removal control modes for the DC / DC converter. Specifically, the CV load-removal mode of the DC / DC converter allows the power supply device to control the charging power within a certain controllable range, thereby reducing the wireless charging device's dependence on the rated power of the power supply device. If the rated power of the power supply device cannot meet the peak power of wireless charging, the power supply device can use its maximum capacity to support the wireless charging device in charging the device to be charged.

[0134] At the same time, for wireless charging devices, precisely because of the control of the working mode of the DC / DC converter, the rated power of the supporting power supply equipment is no longer required to be very large. As long as the peak power can reach the maximum, the wireless charging device can charge the device to be charged at its maximum capacity for a short time. When the power of the device to be charged gradually increases, the power supply equipment will gradually return to the rated rate to support the wireless charging device to charge the device to be charged.

[0135] Based on the above Figure 5 and Figure 6 Furthermore, in the embodiments of the application, taking the adapter (power supply device), wireless charger (wireless charging device), and wireless terminal (device to be charged) as an example, Figure 8 Indication for wireless charging Figure 1 , Figure 9 Indication for wireless charging Figure 2 , Figure 10 Indication for wireless charging Figure 3 .

[0136] like Figure 8 As shown, by detecting the charging parameters of the DC / DC converter (at least one parameter among the input current, input voltage, output current, and output voltage), it can be determined that the real-time output power of the DC / DC converter is small, that is, the real-time charging power of the wireless charger to charge the wireless terminal is small, and the adapter can meet the charging requirements of the wireless charger. At this time, the output mode of the adapter is CV mode, and it can be further determined that the target operating mode of the DC / DC converter is CP mode.

[0137] It can be understood that in this application, in the initial stage of charging, the charging power provided by the wireless charger to the wireless terminal is relatively small, which is a low-power constant-power charging period. At this time, the power that the adapter can provide can fully meet the needs of the wireless charger. Therefore, the DC / DC converter of the wireless charger operates in CP extraction mode and the adapter operates in CV output mode.

[0138] like Figure 9 As shown, by detecting the charging parameters of the DC / DC converter (at least one of the input current, input voltage, output current, and output voltage), it can be determined that the real-time output power of the DC / DC converter has reached the power peak corresponding to the wireless terminal, that is, it is determined that the real-time charging power of the wireless charger has been increased to the upper power limit. If the power provided by the adapter can meet the charging demand of the wireless charger at this time, that is, the charging power that meets the upper power limit can also be provided in a short time, at this time, the output mode of the adapter is CV mode, and accordingly, the wireless charger can determine that the target operating mode of the DC / DC converter is CP mode or CC mode.

[0139] It can be understood that in this application, after entering the fast charging period, the charging power of the wireless charger to the wireless terminal is increased to the peak power, which is the high-power current-limited charging period. At this time, the adapter enters the short-term maximum power mode, and the power provided can meet the maximum power requirement of the wireless charger. The DC / DC converter of the wireless charger operates in CP extraction mode or CC extraction mode, and the adapter operates in CV output mode.

[0140] like Figure 10 As shown, by detecting the charging parameters of the DC / DC converter (at least one parameter among the input current, input voltage, output current, and output voltage), it can be determined that the real-time output power of the DC / DC converter is continuously increasing, that is, it is determined that the real-time charging power of the wireless charger needs to be gradually increased to the power upper limit. If the power provided by the adapter does not meet the charging demand of the wireless charger at this time, for example, before the real-time output power of the DC / DC converter reaches the power peak corresponding to the wireless terminal, the input voltage of the DC / DC converter begins to decrease, that is, it is unable to provide charging power that meets the power upper limit in a short time. At this time, the output mode of the adapter is switched to CC mode. Accordingly, the wireless charger can determine that the target operating mode of the DC / DC converter is CV mode.

[0141] It can be understood that in this application, after entering the fast charging period, the charging power of the wireless charger to the wireless terminal will gradually increase to the peak power. If the power provided by the adapter to the wireless charging device cannot meet the maximum power requirement of the wireless charger, the charging current of the adapter will continue to increase to the maximum current value. At this time, the adapter will switch to the CC output mode. Accordingly, the DC / DC converter of the wireless charger switches to the CV load mode, which is only used for power transfer. It is no longer forced to obtain the maximum power from the adapter, but the control of the charging power is handed over to the adapter. This is the variable power charging period.

[0142] like Figure 10 As shown, by detecting the charging parameters of the DC / DC converter (at least one parameter among the input current, input voltage, output current, and output voltage), it can be determined that the real-time output power of the DC / DC converter has reached the power peak corresponding to the wireless terminal, that is, the real-time charging power of the wireless charger is increased to the power upper limit. If the power provided by the adapter can meet the charging requirements of the wireless charger, and after providing the charging power that meets the power upper limit for a period of time, the adapter cannot continue to provide the maximum power and needs to enter a power reduction period, that is, it needs to reduce the power to ensure its own stable operation. For example, after the real-time output power of the DC / DC converter reaches the power peak corresponding to the wireless terminal for a period of time, the input voltage of the DC / DC converter begins to decrease, so the output mode will be switched from CV mode to CC mode. Accordingly, the wireless charger can determine that the target operating mode of the DC / DC converter is CV mode.

[0143] It can be understood that in this application, after entering the fast charging period, the charging power of the wireless charger to the wireless terminal will gradually increase to the peak power. If the power provided by the adapter to the wireless charging device can meet the maximum power requirement of the wireless charger, and after charging the wireless charger at maximum power for a period of time, the adapter will enter the power reduction period and switch to the CC output mode. Accordingly, the DC / DC converter of the wireless charger switches to the CV load extraction mode, which is only used for power transfer. It is no longer forced to obtain the maximum power from the adapter, but the control of the charging power is handed over to the adapter. This is the variable power charging period.

[0144] That is to say, in this application, after fast charging has been working for a period of time, the adapter can no longer continue to provide maximum power and needs to reduce power to ensure its own stable operation. Therefore, the adapter will enter a power reduction period. At this time, the adapter reduces the output current and enters the CC output mode; and the target working mode of the DC / DC converter of the wireless charger is switched to the CV withdrawal mode, and the charging power is determined by the output power of the adapter. Specifically, in the process of the DC / DC converter working in the CV withdrawal mode, the control of the charging power is performed by the adapter, and the DC / DC converter of the wireless charger is only used for power transfer and is no longer forced to obtain maximum power. In contrast, the DC / DC converter working in the CV withdrawal mode can avoid the abnormal operation of the charging system (undervoltage protection or overcurrent protection, etc.) triggered by the traditional DC / DC withdrawal mode due to the inability to meet the power reduction requirements of the adapter, thereby solving the problem of intermittent charging or even failure to charge.

[0145] like Figure 8 As shown, by detecting the charging parameters of the DC / DC converter (at least one parameter among the input current, input voltage, output current, and output voltage), it can be determined that the output current of the DC / DC converter is decreasing. At the same time, the input current of the DC / DC converter is decreasing, that is, the charging power required by the wireless terminal is gradually decreasing, and the adapter can meet the needs of the wireless charger to wirelessly charge the wireless terminal. At this time, the output mode of the adapter is CV mode. Accordingly, the wireless charger can determine that the target operating mode of the DC / DC converter is CP mode.

[0146] It can be understood that in the present application, as the charging time increases, the power of the wireless terminal gradually increases, and the charging power required by the wireless terminal gradually decreases, which is a low-power charging period. The wireless charger enters a fast charging exit period. Therefore, the charging power provided by the wireless charger to the wireless terminal will gradually decrease. Correspondingly, the load power of the wireless charger will also gradually decrease. Then the output mode of the power supply device is CV mode. Accordingly, the wireless charger can determine that the target operating mode of the converter is CP mode.

[0147] Furthermore, in the embodiments of the present application, the wireless charging method proposed in the present application is not limited to use on wireless charging devices, but can also be applied to other devices, such as mobile power supplies.

[0148] Based on the above Figure 5 and Figure 6 , further, in the embodiment of the application, taking the adapter, mobile power supply, and mobile phone as examples, Figure 11 This is a diagram of the working mode control during charging. Figure 1 , Figure 12 This is a diagram of the working mode control during charging. Figure 2 .

[0149] like Figure 11 As shown, by detecting the charging parameters of the mobile power supply (at least one parameter among the input current, input voltage, output current, and output voltage), when it is determined that the adapter can meet the charging demand of the mobile power supply, the output mode of the adapter is the CV mode, and the target operating mode of the mobile power supply is further determined to be the CC mode; when it is determined that the adapter cannot meet the charging demand of the mobile power supply, the output mode of the adapter is the CC mode, and the target operating mode of the mobile power supply is further determined to be the CV mode.

[0150] like Figure 12 As shown, by detecting the charging parameters of the mobile power supply (at least one parameter among the input current, input voltage, output current, and output voltage), when it is determined that the adapter can meet the charging demand of the mobile power supply, the output mode of the adapter is the CV mode, and the target operating mode of the mobile power supply can also be determined to be the CP mode; when it is determined that the adapter cannot meet the charging demand of the mobile power supply, the output mode of the adapter is the CC mode, and the target operating mode of the mobile power supply is further determined to be the CV mode.

[0151] It should be noted that in the embodiments of the present application, for a mobile power supply, when charging a mobile phone, if the power provided by the adapter to the wireless charging device is insufficient, the adapter is allowed to automatically control the power, that is, the adapter is allowed to switch from the CV output mode to the CC output mode. Accordingly, at this time, the mobile power supply is no longer forced to obtain the maximum power from the adapter.

[0152] It can be seen that the method for adjusting the unloading mode proposed in the embodiment of the present application is effective for the conversion unit between the power supply device (adapter) and the device to be charged (mobile phone), and allows the power supply device to "output as much power as it can" when the rated power is insufficient, thereby reducing the dependence on the rated charging power of the power supply device.

[0153] An embodiment of the present application provides a wireless charging method. During wireless charging, a wireless charging device detects charging parameters of a converter, wherein the charging parameters include at least one of input current, input voltage, output current, and output voltage. A target operating mode is determined based on the charging parameters, wherein the target operating mode is used to determine a load-reduction method for the converter. The converter is then controlled to switch to the target operating mode and charge the device according to the target operating mode. Specifically, in the embodiment of the present application, the DC / DC converter of the wireless charging device can be controlled to operate in different load-reduction modes, such as CV and CP, based on the voltage and current used by the wireless charging device to charge the device and the voltage and current provided by the adapter to the wireless charging device, to ensure a stable charging process. When the DC / DC converter operates in the CP load-reduction mode, the charging power is controlled by the DC / DC converter, and the adapter can provide sufficient power to meet the charging requirements of the wireless charging device for the terminal device. When the DC / DC converter operates in the CV load-reduction mode, the charging power is controlled by the adapter, and the adapter is no longer required to provide maximum charging power, thereby preventing charging interruptions.

[0154] Based on the above embodiment, in another embodiment of the present application, Figure 13 Schematic diagram of the structure of the wireless charging device proposed in this embodiment Figure 1 ,like Figure 13 As shown, the wireless charging device 30 proposed in the embodiment of the present application may include a processor 31, a memory 32 storing executable instructions of the processor 31, and a detection module 33.

[0155] The detection module 33 is used to detect the charging parameters of the converter during wireless charging; wherein the charging parameters include at least one parameter of input current, input voltage, output current and output voltage;

[0156] The processor 31 is configured to determine a target operating mode based on the charging parameters, wherein the target operating mode is used to determine a load removal mode of the converter; and control the converter to switch to the target operating mode to charge the device to be charged based on the target operating mode.

[0157] In an embodiment of the present application, the processor 31 may be at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a controller, a microcontroller, and a microprocessor. It is understandable that for different devices, the electronic device used to implement the functions of the processor may also be other, and the embodiment of the present application is not specifically limited. The wireless charging device 30 may also include a memory 32, which may be connected to the processor 31, wherein the memory 32 is used to store executable program code, which includes computer operating instructions. The memory 32 may include a high-speed RAM memory, and may also include a non-volatile memory, for example, at least two disk memories.

[0158] In the embodiment of the present application, the wireless charging device 30 may further include a communication interface 34 and a bus 35 , wherein the bus 35 is used to connect the communication interface 34 , the processor 31 , and the memory 32 , and to facilitate mutual communication between these devices.

[0159] In the embodiment of the present application, the memory 32 is used to store instructions and data.

[0160] In practical applications, the memory 32 may be a volatile memory, such as a random-access memory (RAM); or a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); or a combination of the above types of memory, and provide instructions and data to the processor 31.

[0161] In addition, the functional modules in this embodiment may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or software functional modules.

[0162] If the integrated unit is implemented in the form of a software functional module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment, or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method of this embodiment. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0163] Furthermore, in the embodiments of the present application, Figure 14 Schematic diagram of the structure of the wireless charging device proposed in this embodiment Figure 2 ,like Figure 14 It is shown that the wireless charging device 30 proposed in the embodiment of the present application may also include a wireless charging transmitting unit 36, a converter 37, and an inverter unit 38. The wireless charging device 30 composed of the wireless charging transmitting unit 36, the converter 37, and the inverter unit 38 can be used to implement the wireless charging method proposed in the above embodiment.

[0164] It is understood that in the embodiment of the present application, the wireless charging transmitting unit 36 ​​can be the above-mentioned Figure 1 The wireless charging transmitting unit 121 or the above Figure 4 The wireless charging transmitting unit 222 is used to convert the output voltage and output current of the power supply device into a wireless charging signal (electromagnetic signal) for transmission.

[0165] It is understood that in the embodiment of the present application, the converter 37 may be the above-mentioned Figure 2 The DC / DC converter 122 or the above Figure 4 The DC / DC converter 221 in the embodiment is used to scale the fixed voltage received from the power supply device.

[0166] It is understood that in the embodiment of the present application, the inverter unit 38 can be the above-mentioned Figure 2The inverter 123 is used to convert the DC voltage (Vsdc) into the AC voltage (Vsac).

[0167] An embodiment of the present application provides a wireless charging device that, during wireless charging, detects charging parameters of a converter, wherein the charging parameters include at least one of input current, input voltage, output current, and output voltage; determines a target operating mode based on the charging parameters; wherein the target operating mode is used to determine a load-removal method for the converter; controls the converter to switch to the target operating mode, and charges the device to be charged according to the target operating mode. Specifically, in an embodiment of the present application, the DC / DC converter of the wireless charging device can be controlled to operate in different load-removal modes, such as CV and CP, based on the voltage and current used by the wireless charging device to charge the device and the voltage and current provided by the adapter to the wireless charging device, to ensure a stable charging process. When the DC / DC converter operates in the CP load-removal mode, the charging power is controlled by the DC / DC converter, and the adapter can provide sufficient power to meet the charging requirements of the wireless charging device for the terminal device. When the DC / DC converter operates in the CV load-removal mode, the charging power is controlled by the adapter, and the adapter is no longer required to provide maximum charging power, thereby preventing charging interruptions.

[0168] An embodiment of the present application provides a computer-readable storage medium having a program stored thereon, which implements the wireless charging method described above when executed by a processor.

[0169] Specifically, the program instructions corresponding to a wireless charging method in this embodiment can be stored on a storage medium such as a CD, a hard disk, or a USB flash drive. When the program instructions corresponding to a wireless charging method in the storage medium are read or executed by an electronic device, the following steps are included:

[0170] During wireless charging, detecting charging parameters of the converter; wherein the charging parameters include at least one parameter of input current, input voltage, output current, and output voltage;

[0171] Determining a target operating mode based on the charging parameters; wherein the target operating mode is used to determine a load removal mode of the converter;

[0172] The converter is controlled to switch to the target operating mode to charge the device to be charged based on the target operating mode.

[0173] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0174] The present application is described with reference to the implementation flow charts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flow charts and / or block diagrams, as well as the combination of processes and / or boxes in the flow charts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the implementation flow charts. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0175] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which is implemented in the implementation flow diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0176] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process described in the flowchart. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0177] The above description is merely a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application.

Claims

1. A wireless charging method, characterized in that: The method is applied to a wireless charging device, and the method includes: During wireless charging, detecting charging parameters of the converter; wherein the charging parameters include at least one parameter of input current, input voltage, output current, and output voltage; Determining a target operating mode based on the charging parameters; wherein the target operating mode is used to determine a load removal mode of the converter; controlling the converter to switch to the target operating mode to charge the device to be charged based on the target operating mode; The target operating mode includes at least: a constant power CP mode, a constant voltage CV mode, or a constant resistance CR mode; when the converter operates in the CP mode, the output power of the power supply device is increased to the rated power; when the converter operates in the CV mode, the output power of the power supply device is reduced; when the converter operates in the CR mode, the converter obtains input power from the power supply device according to a constant voltage-to-current ratio; Determining the target operating mode further includes: Comparing the charging parameters of the converter at the current moment with the charging parameters of the converter at the previous moment to determine a comparison result; According to the comparison result, a target operating mode of the converter corresponding to the current charging parameter is determined.

2. The method according to claim 1, characterized in that The determining a target operating mode according to the input current, the input voltage, the output current, and the output voltage includes: determining a real-time charging power according to the output current and the output voltage; If the real-time charging power is less than the preset power threshold, the target operating mode is determined to be a fixed power CP mode.

3. The method according to claim 1, characterized in that The determining a target operating mode according to the input current, the input voltage, the output current, and the output voltage includes: Determine the real-time input power according to the input current and the input voltage; and determine the real-time charging power according to the output current and the output voltage; If the real-time charging power is equal to the real-time input power, and the real-time charging power is equal to the upper power limit, the target operating mode is determined to be the CP mode.

4. The method according to claim 1, wherein Before determining the target operating mode according to the input current, the input voltage, the output current, and the output voltage, the method further includes: A historical input current, a historical input voltage, a historical output current, and a historical output voltage of the converter are determined.

5. The method according to claim 4, characterized in that The determining a target operating mode according to the input current, the input voltage, the output current, and the output voltage includes: Determine the real-time input power according to the input current and the input voltage; and determine the real-time charging power according to the output current and the output voltage; If the real-time charging power is greater than or equal to the real-time input power, and the historical input voltage is greater than the input voltage, the target operating mode is determined to be a constant voltage (CV) mode.

6. The method according to claim 4, characterized in that The determining a target operating mode according to the input current, the input voltage, the output current, and the output voltage includes: If the output current is less than the historical output current, and the input current is less than the historical input current, the target operating mode is determined to be the CP mode.

7. The method according to claim 2, 3 or 6, characterized in that: Charging the device to be charged according to the target operating mode includes: determining a real-time input power according to the input current and the input voltage; The real-time input power is determined as a target charging power, and the device to be charged is charged according to the target charging power.

8. The method according to claim 5, characterized in that Charging the device to be charged according to the target operating mode includes: Determining the real-time input power as a target charging power, and determining the input voltage as a target charging voltage; The device to be charged is charged according to the target charging power and the target charging voltage.

9. The method according to claim 1, characterized in that The method further comprises: Detecting the charging parameters through a control circuit provided by the converter; or, The charging parameters are detected by a controller.

10. A wireless charging device, characterized in that: The wireless charging device includes: a processor, a memory storing instructions executable by the processor, and a detection module. The detection module is used to detect charging parameters of the converter during wireless charging; wherein the charging parameters include at least one parameter of input current, input voltage, output current and output voltage; The processor is configured to determine a target operating mode based on the charging parameters; wherein the target operating mode is configured to determine a load removal method of the converter; control the converter to switch to the target operating mode to charge the device to be charged based on the target operating mode; the target operating mode includes at least a fixed power CP mode, a constant voltage CV mode, or a fixed resistance CR mode; when the converter operates in the CP mode, the output power of the power supply device is increased to the rated power; when the converter operates in the CV mode, the output power of the power supply device is reduced; when the converter operates in the CR mode, the converter obtains input power from the power supply device according to a constant voltage-to-current ratio; determining the target operating mode further includes comparing the charging parameters of the converter at a current moment with the charging parameters of the converter at a previous moment to determine a comparison result; and determining the target operating mode of the converter corresponding to the charging parameters at the current moment based on the comparison result.

11. A wireless charging device, characterized in that: The wireless charging device includes: a wireless charging transmitting unit, a converter, and an inverter unit; the wireless charging device is used to implement the method according to any one of claims 1 to 9.

12. A computer-readable storage medium having a program stored thereon, applied to a wireless charging device, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 9 is implemented.

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