WO2022242347A1 - 无线充电方法、装置及存储介质 - Google Patents

无线充电方法、装置及存储介质 Download PDF

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Publication number
WO2022242347A1
WO2022242347A1 PCT/CN2022/085374 CN2022085374W WO2022242347A1 WO 2022242347 A1 WO2022242347 A1 WO 2022242347A1 CN 2022085374 W CN2022085374 W CN 2022085374W WO 2022242347 A1 WO2022242347 A1 WO 2022242347A1
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WO
WIPO (PCT)
Prior art keywords
power
charging
wireless charging
mode
real
Prior art date
Application number
PCT/CN2022/085374
Other languages
English (en)
French (fr)
Inventor
郭红光
田晨
张加亮
Original Assignee
Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2022242347A1 publication Critical patent/WO2022242347A1/zh
Priority to US18/505,261 priority Critical patent/US20240072574A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current

Definitions

  • the present application relates to the technical field of wireless charging, and in particular to a wireless charging method, device and storage medium.
  • the DC/DC converter on the wireless charging device supplies power to the inverter unit in constant voltage (Constant Voltage, CV) mode or constant power (Constant Power, CP) mode, and in CP mode or constant Stream (Constant Current, CC) mode draws power from the pre-adapter.
  • CV Constant Voltage
  • CP Constant Power
  • CP constant Power
  • CP constant Stream
  • CC Constant Current
  • the wireless charging device may fail to charge when increasing the charging power, and if the rated power of the adapter is increased, the power of the adapter will be wasted during the charging process. It can be seen that the existing wireless charging method has low intelligence and poor stability.
  • Embodiments of the present application provide a wireless charging method, device, and storage medium.
  • the embodiment of the present application provides a wireless charging method, the method comprising:
  • the charging parameters include at least one parameter of input current, input voltage, output current, and output voltage;
  • the target operating mode is used to determine a pumping mode of the converter
  • the converter is controlled to switch to the target operation mode, so as to charge the device to be charged based on the target operation mode.
  • the embodiment of the present application provides a wireless charging device, the wireless charging device includes: a processor, a memory storing instructions executable by the processor, and a detection module,
  • the detection module is configured 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 according to the charging parameters; wherein the target operating mode is used to determine a load-loading 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 working mode.
  • the embodiment of the present application provides a wireless charging device, the wireless charging device includes: a wireless charging transmitting unit, a converter, and an inverter unit; the wireless charging device is used to realize the wireless charging method.
  • the embodiment of the present application provides a computer-readable storage medium, on which a program is stored, which is applied to a wireless charging device.
  • the program is executed by a processor, the wireless charging described in the first aspect is realized. method.
  • FIG. 1 is a schematic diagram of a wireless charging system
  • Fig. 2 is a schematic diagram of the implementation of a wireless charging method
  • FIG. 3 is a schematic diagram of the implementation flow of the wireless charging method proposed in the embodiment of the present application.
  • FIG. 4 is a second schematic diagram of the implementation flow of the wireless charging method proposed in the embodiment of the present application.
  • FIG. 5 is a first schematic diagram of the implementation of wireless charging in the embodiment of the present application.
  • FIG. 6 is a second schematic diagram of the implementation of wireless charging in the embodiment of the present application.
  • FIG. 7 is a schematic diagram of a working mode of a common wireless charging device
  • FIG. 8 is a schematic diagram 1 of wireless charging
  • FIG. 9 is a second schematic diagram of wireless charging
  • Fig. 10 is a schematic diagram 3 of wireless charging
  • Fig. 11 is a schematic diagram of working mode control during charging
  • Fig. 12 is a schematic diagram 2 of working mode control in the charging process
  • FIG. 13 is a first schematic diagram of the composition and structure of the wireless charging device proposed in the embodiment of the present application.
  • FIG. 14 is a second schematic diagram of the composition and structure of the wireless charging device proposed in the embodiment of the present application.
  • FIG. 1 is a schematic diagram of a wireless charging system.
  • the wireless charging system 10 includes a power supply device 110, a wireless charging device 120, and a device to be charged 130, wherein the power supply device 110 is, for example, It may be an adapter, the wireless charging device 120 may be, for example, a wireless charging base, and the device to be charged 130 may be, for example, a terminal.
  • the power supply device 110 is, for example, It may be an adapter
  • the wireless charging device 120 may be, for example, a wireless charging base
  • the device to be charged 130 may be, for example, a terminal.
  • the output voltage and output current of the power supply device 110 can be transmitted to the wireless charging device 120 .
  • 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) through the internal wireless charging transmitting unit 121 for transmission.
  • the wireless charging transmitting unit 121 can convert the output current of the power supply device 110 into alternating current, and convert the alternating current into a wireless charging signal through a transmitting coil or a transmitting antenna.
  • 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 an output voltage and an output current of the wireless charging receiving unit 131 .
  • 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 receiving antenna, and perform operations such as rectification and/or filtering on the alternating current to convert the alternating current into wireless charging.
  • the output voltage and output current of the 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 receiving antenna, and perform operations such as rectification and/or filtering on the alternating current to convert the alternating current into wireless charging.
  • Wireless charging (wireless power) technology is derived from wireless power transmission technology.
  • the wireless charging function is becoming more and more popular, and the charging power is getting higher and higher.
  • wireless charging devices are becoming more and more popular, and their power is also increasing.
  • the requirements for adapters that power wireless charging devices are also increasing.
  • the wireless charging power of mobile phones has reached 80W, while the supporting adapter power needs to be above 100W.
  • the wireless charging power of domestic mainstream brand mobile phone manufacturers is generally around 40W ⁇ 60W, and generally uses an adapter with a rated power much higher than the wireless charging power for charging.
  • FIG. 2 is a schematic diagram of an implementation of a wireless charging method.
  • a wireless charging device 120 receives a fixed voltage from a direct current (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, which may be, for example, a DC-to-AC (Direct Current-Alternating Current, DC-AC) inverter, Used to convert DC voltage (Vsdc) to AC voltage (Vsac).
  • the inverter 123 together with the transmitter matching network generates an alternating current (Alternating Current, AC) current in the transmitter coil.
  • AC current in the transmitter coil generates an oscillating magnetic field according to Ampere's law.
  • the oscillating magnetic field induces an AC voltage to the tuned receiver coil (located in the device to be charged 130 ) according to Faraday's law.
  • DC/DC means DC to DC (that is, the conversion of different DC power supply values). If a DC voltage (3.0V) can be converted into other DC voltages (1.5V or 5.0V) through a converter, it can be called This converter is a DC/DC converter, or called a switching power supply or a switching regulator.
  • the DC/DC on the wireless charging device supplies power to the inverter unit in constant voltage (Constant Voltage, CV) mode or fixed power (Constant Power, CP) mode, and in CP mode or constant current ( Constant Current (CC) mode draws power from the pre-adapter.
  • CV Constant Voltage
  • CP Constant Power
  • CC Constant Current
  • the pre-adapter needs to work 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 a problem of disconnection or even failure to charge.
  • the power of the mobile phone gradually increases, the charging power gradually decreases, and the adapter enters the light-load mode, and its charging capacity is far from being fully utilized.
  • the output power of the corresponding adapter increases.
  • the power demand for the adapter will gradually decrease at this time. If the rated power of the adapter is designed to be the maximum power required by the terminal product, it will inevitably cause great waste, that is, The output capability of the adapter is far from being brought into play.
  • the matching adapter needs a larger rated output power to ensure wireless charging.
  • the charging device can obtain the maximum peak power to charge the terminal equipment. If the rated power of the adapter is not large enough, when the wireless charging device increases the charging power, there may be problems with intermittent charging or even failure to charge.
  • the wireless charging device will break the charging problem when the charging power is increased, and if the rated power of the adapter is increased, the adapter power will be caused during the charging process. waste. It can be seen that the existing wireless charging method has low intelligence and poor stability.
  • this application proposes a wireless charging method, which can control the DC/DC converter of the wireless charging device to work in different pumping modes such as CV and CP, and can seamlessly operate in different working modes such as CV and CP. switch.
  • the charging power provided by the wireless charging device to the terminal equipment 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.
  • the charging power is controlled by the DC/DC.
  • the adapter can provide enough power to meet the needs of the wireless charging device to charge the terminal equipment.
  • the DC/DC converter of the wireless charging device can be controlled during the charging process according to the voltage and current that the wireless charging device charges the device to be charged, and the voltage and current that the adapter provides to the wireless charging device Work in different pumping modes such as CV and CP to ensure a stable charging process.
  • the charging power is controlled by the DC/DC, and the adapter can provide enough power to meet the needs of the wireless charging device to charge the terminal equipment; when the DC/DC works in the CV pumping mode , the charging power is controlled by the adapter. At this time, the adapter is no longer required to provide the maximum charging power, so there will be no problem of interruption of charging.
  • FIG. 3 is a schematic diagram of the implementation process of the wireless charging method proposed in the embodiment of the present application.
  • the wireless charging device performs wireless charging.
  • the charging method may include the following steps:
  • Step 101 When performing wireless charging, detect charging parameters of the converter; wherein, the charging parameters include at least one parameter among input current, input voltage, output current, and output voltage.
  • the wireless charging device when performing wireless charging, may first detect charging parameters corresponding to the converter, wherein the charging parameters include at least one parameter among input current, input voltage, output current and output voltage. Specifically, the wireless charging device may detect one or more parameters of the converter's input current, input voltage, output current, and output voltage.
  • the wireless charging device can be equipped with a converter, wherein, when performing wireless charging, the wireless charging device can convert a DC voltage into another DC voltage through the converter, that is, the wireless charging device
  • the configured converter may be a DC/DC converter.
  • the wireless charging device may be a component of the wireless charging system.
  • the wireless charging system may also include a device to be charged and a power supply device, wherein, The power supply device can be used to charge the wireless charging device, and the wireless charging device can wirelessly charge the device to be charged by establishing a wireless connection with the device to be charged.
  • the power supply device may be an adapter, a power supply, and the like
  • the wireless charging device may be a charging base, and the like
  • the device to be charged may be a mobile phone, a game console, and the like.
  • the device to be charged can be any terminal with communication and storage functions, such as: tablet computer, mobile phone, e-reader, remote control, personal computer (Personal Computer, PC), notebook computer, vehicle-mounted Devices, Internet TV, wearable devices, personal digital assistants (Personal Digital Assistant, PDA), portable media players (Portable Media Player, PMP), navigation devices and other terminals.
  • the power supply device provides power supply for the wireless charging device, and 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.
  • the device to be charged may first establish a wireless connection with a wireless charging device and perform two-way communication, so as to realize wireless charging.
  • the power supply device and the device to be charged can also establish wireless communication, so that bidirectional data transmission can be realized.
  • the power supply device can be used to charge the wireless charging device; in some embodiments of the present application, the power supply device and the wireless charging device can be connected through a Universal Serial Bus (USB ) interface, the USB interface can be an ordinary USB interface, or 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 may be the VBus line and/or the ground line in the USB interface.
  • the data line in the USB interface is used for two-way communication between the power supply equipment and the wireless charging device.
  • the data line can be the D+ line and/or D- line in the USB interface. interaction.
  • the power supply device can support the normal charging mode and the fast charging mode, wherein the charging current of the fast charging mode is greater than that of the normal charging mode, that is, the charging speed of the fast charging mode is greater than that of the normal charging mode.
  • the charging speed of the charging mode can be supported by the normal charging mode and the fast charging mode, wherein the charging current of the fast charging mode is greater than that of the normal charging mode, that is, the charging speed of the fast charging mode is greater than that of the normal charging mode.
  • the power supply device can be connected to the converter in the wireless charging device, therefore, the real-time output voltage of the power supply device to the wireless charging device is the input voltage of the converter.
  • the wireless charging device may perform voltage conversion on the real-time output voltage of the power supply device, that is, the input voltage of the converter, through a converter, so as to obtain and provide an output voltage.
  • the current output from the power supply equipment to the wireless charging device in real time is the input current of the converter.
  • the output mode of the power supply equipment may be a constant current CC mode or a constant voltage CV mode.
  • working in the CC mode means that the power supply device outputs a constant current for the purpose of providing a stable current.
  • the power supply device works in CC mode, in order to ensure a stable output current, if the output power increases, the output voltage increases; if the output power decreases, the output The voltage decreases.
  • working in CV mode means that the power supply equipment outputs a constant voltage for the purpose of providing stable voltage.
  • the power supply device works in CV mode, in order to ensure a stable output voltage, if the output power increases, the output current increases; if the output power decreases, the output The current decreases.
  • the pumping mode of the wireless charging device may be a constant current CC mode, a fixed power CP mode, a constant voltage CV mode, and the like.
  • working in the CC mode means that the wireless charging device draws a constant current for the purpose of obtaining a stable current.
  • the wireless charging device works in CC mode, in order to ensure a stable current, if the power required by the device to be charged increases, the voltage obtained by the wireless charging device increases, and if the power required by the device to be charged decreases , then the voltage obtained by the wireless charging device decreases.
  • working in the CV mode means that the wireless charging device draws a constant voltage for the purpose of obtaining a stable voltage.
  • the wireless charging device works in CV mode and the rated power provided by the power supply device can meet the maximum power of the wireless charging device for wirelessly charging the device to be charged, in order to ensure a stable voltage, if the power required by the device to be charged increases If the value is large, the current obtained by the wireless charging device increases, and if the power required by the device to be charged decreases, the current obtained by the wireless charging device decreases.
  • working in the CP mode means that the wireless charging device draws constant power for the purpose of obtaining stable power.
  • the wireless charging device works in CP mode and the power supply device works in CV mode, in order to ensure stable power acquisition, if the power required by the device to be charged increases, the wireless charging device The current obtained increases, and if the power required by the device to be charged decreases, the current obtained by the wireless charging device decreases.
  • the wireless charging device can detect the input current, the input voltage, the output current and the output voltage through the control circuit set by the converter; or, the wireless charging device The input current, the input voltage, the output current and the output voltage may also be detected by a controller.
  • the wireless charging device can detect charging parameters such as input current, input voltage, output current, and output voltage of the converter in various ways.
  • the wireless charging device can directly monitor and collect charging parameters through a converter, or can monitor and collect charging parameters through a configured controller. This application does not make specific limitations.
  • a control circuit may be provided inside the DC/DC converter, and the control circuit may detect charging parameters of the DC/DC converter.
  • the wireless charging device may also be configured with a controller outside the DC/DC converter, and the controller may detect charging parameters of the DC/DC converter.
  • Step 102 Determine a target operating mode according to the charging parameters; wherein, the target operating mode is used to determine a pumping mode of the converter.
  • the wireless charging device after detecting the 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 can further determine the target operating mode according to the charging parameters. .
  • the target working mode is the pumping mode determined by the converter in the wireless charging device in order to adapt to the charging parameters, wherein the target working mode may include but not limited to any of the following pumping modes Mode: CC mode, CV mode, CP mode, fixed resistance CR mode.
  • the pumping method is a method in which the wireless charging device obtains power from the power supply device.
  • the target operating mode is CP mode
  • the load mode of the converter is the same power mode, that is, the converter draws power from the power supply device at a constant power.
  • the converter " When the voltage provided by the power supply equipment decreases, the current of the converter’s “power consumption” increases accordingly to ensure the constant power; when the target operating mode is CV mode, determine the converter
  • the load pumping method is the same voltage mode, that is, the converter draws power from the power supply device according to a constant voltage. When the current provided by the power supply device increases, the power obtained by the converter increases correspondingly.
  • the power obtained by the converter is correspondingly reduced;
  • the target operating mode is CC mode, it is determined that the load mode of the converter is the same current mode, that is, the converter draws power from the power supply device according to a constant current, when the power supply device
  • the load mode is a mode in which the ratio of voltage to current is constant, that is, the converter draws power from the power supply device according to a constant ratio of voltage to current.
  • the charging power that the wireless charging device needs to provide to the device to be charged is different.
  • the wireless charging device detects The charging parameters 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 charging time.
  • the wireless charging device when the wireless charging device determines the target operating mode according to charging parameters including at least one parameter including input current, input voltage, output current, and output voltage, it may first base the output current and the specified The output voltage determines the real-time charging power; if the real-time charging power is less than the preset power threshold, the target working mode is determined as the fixed power CP mode.
  • the wireless charging device can first determine the charging power for wireless charging to the device to be charged according to the detected output current and output voltage, that is, the real-time charging power, and then compare the real-time charging power with the preset The threshold value, that is, the preset power threshold value is compared, so as to determine the target operating mode of the converter corresponding to the charging parameter according to the comparison result.
  • the preset power threshold may be a specific value preset by the wireless charging device for selecting the working mode of the converter.
  • the wireless charging device can set the preset power threshold according to the charging peak power corresponding to the device to be charged, for example, setting the preset power threshold equal to the charging peak power, or setting the preset power threshold equal to the charging peak power 1/2 of.
  • the wireless charging device can determine that the target operating mode of the converter is the CP mode.
  • 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 for wireless charging to the device to be charged.
  • the power supply device works in CV output mode, and the DC/DC converter of the wireless charging device works in CP pumping mode.
  • the wireless charging device when it determines the target operating mode based on charging parameters including at least one parameter including input current, input voltage, output current, and output voltage, it may first determine the target operating mode based on the input current and input voltage.
  • the charging power provided by the power supply equipment is the real-time input power.
  • the real-time charging power can be determined according to the output current and output voltage; For CP mode.
  • the wireless charging device can determine the charging power for wireless charging to the device to be charged according to the detected output current and output voltage, that is, the real-time charging power, and can also determine the charging power according to the detected input current and input voltage to determine the charging power transmitted by the power supply equipment, that is, the real-time input power, and then compare the real-time charging power with the real-time input power, and at the same time compare the real-time charging power A target operating mode of the converter corresponding to the charging parameter is determined.
  • the power upper limit value may be the maximum power value of the wireless charging device for charging the device to be charged, that is, the charging peak power corresponding to the device to be charged.
  • the maximum power value when the device to be charged performs wireless charging that is, the power upper limit value is 65W (10V/6.5A).
  • the wireless charging device enters the fast charging period.
  • the real-time charging power of the wireless charging device increases to the power upper limit value, which is 65W. If the power provided by the power supply device It 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, and accordingly, the wireless charging device can determine the target work of the converter The mode is CP mode.
  • 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, and if the power provided by the power supply device can also meet the requirements of wireless charging If the device needs to wirelessly charge the device to be charged, then the power supply device works in CV output mode, and the DC/DC converter of the wireless charging device works in CP pumping mode.
  • FIG. 4 is a schematic diagram of the second implementation flow of the wireless charging method proposed in the embodiment of the application.
  • the method for wireless charging by a wireless charging device may further include the following steps:
  • Step 104 determine the historical input current, historical input voltage, historical output current and historical output voltage of the converter.
  • the wireless charging device can continuously detect the 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 of the converter at each moment. Under the corresponding charging parameters. Among them, compared with the input current, input voltage, output current and output voltage, the charging parameters detected at the previous moment are the historical input current, historical input voltage, historical output current and historical output voltage.
  • 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 the adjacent first time t1 and second time t2 (t2 is greater than t1), and can correspond to the first time t1
  • the input current, input voltage, output current and output voltage 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 second time t2 are used as Real-time charging parameters, at the next continuous time, such as the third time t3 (t3 is greater than t2), after charging parameters including input current, input voltage, output current and output voltage are detected, the charging parameters corresponding to the second time t2 can be used to overwrite
  • the charging parameters corresponding to the first time t1, that is, the input current, input voltage, output current and output voltage corresponding to the second time t2 are stored as the historical input current
  • the wireless charging device when it determines the target operating mode based on charging parameters including at least one parameter including input current, input voltage, output current, and output voltage, it may first determine the target operating mode based on the input current and input voltage.
  • the charging power provided by the power supply equipment is the real-time input power, and the real-time charging power can be determined according to 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 working mode can be set to Determined as constant voltage CV mode.
  • the wireless charging device can determine the charging power for wireless charging to the device to be charged according to the detected output current and output voltage, that is, the real-time charging power, and can also determine the charging power according to the detected input current and input voltage to determine the charging power transmitted by the power supply equipment, that is, the real-time input power, and then compare the real-time charging power with the real-time input power, and compare the historical input voltage with the input voltage, so as to determine the charging parameters according to the comparison results corresponds to the target operating mode of the converter.
  • the power supply equipment switches from CV output mode to CC output mode. model.
  • the wireless charging device enters the fast charging period, and the real-time charging power of the wireless charging device needs to gradually increase to the power upper limit value, which is 65W. Assuming that the wireless charging device at this time The real-time charging power is increased to 60W. If the power provided by the power supply equipment cannot meet the charging demand of the wireless charging device at this time, that is, the rated power of the power supply equipment cannot reach 65W, or even 60W, then the power supply equipment must maintain its own stable operation. , the output mode will be switched from the CV mode to the CC mode, and accordingly, the wireless charging device can determine that the target operating mode of the converter is the CV mode.
  • 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. If the power provided by the power supply device cannot meet the requirements of the wireless charging device The demand for wireless charging to the device to be charged, that is, the rated power of the power supply device is less than the power upper limit, 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 works at CV pumping model.
  • the charging power provided by the wireless charging device to the device to be charged gradually increases towards the peak power, that is, the real-time charging power is less than or equal to the power upper limit value, if the power provided by the power supply device cannot meet the
  • the wireless charging device needs to wirelessly charge the device to be charged, that is, the rated power of the power device is less than the real-time charging power, then the power device needs to switch from CV output mode to CC output mode, and the DC/DC converter of the wireless charging device works at CV pumping mode.
  • the wireless charging device enters a stable period.
  • the real-time charging power of the wireless charging device is increased to the power upper limit value, which is 65W, and the power supply device is charging according to the power of 65W.
  • the power reduction period that is, it needs to reduce the power to ensure its own stable operation, so the output mode will be switched from CV mode to CC mode, correspondingly,
  • the wireless charging device can determine that the target working mode of the converter is the CV mode.
  • 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, if the power provided by the power supply device can meet the requirements of the wireless charging device
  • the power supply device needs to enter the power reduction period, switch from CV output mode to CC output mode, the DC/ The DC converter works in CV pumping mode.
  • the wireless charging device when the target operating mode of the wireless charging device is CV mode, that is, when the DC/DC converter works in the CV pumping mode, the wireless charging device no longer forcibly acquires It is used to provide the maximum power to the device to be charged, but to give the control of the charging power to the power supply device, that is, to charge the device to be charged according to the charging power that the power supply device can provide. At this time, the DC/ A DC converter is used for power transfer.
  • the wireless charging device determines the target operating mode according to charging parameters including at least one parameter including input current, input voltage, output current, and output voltage, if the historical output current is greater than the output current, and If the historical input current is greater than the input current, then the target operating mode can be determined as the CP mode.
  • the wireless charging device can compare the output current with the historical output current, and at the same time compare the historical input current with the input current, so as to determine the target operation of the converter corresponding to the charging parameters according to the comparison result model.
  • the power supply device works in the CV output mode, and the DC/DC converter of the wireless charging device works in the CP pumping mode.
  • 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 The input current is 8A and 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. Correspondingly, The pumping power of the wireless charging device is also gradually decreasing, so the output mode of the power supply device is the CV mode, and accordingly, the wireless charging device can determine that the target working mode of the converter is the CP mode.
  • the power provided by the power supply device can meet the wireless charging device's wireless charging requirements for the device to be charged, then the power supply device works at In CV output mode, the DC/DC converter of the wireless charging device works in CP pumping mode.
  • Step 103 control the converter to switch to the target working mode, and charge the device to be charged according to the target working mode.
  • the wireless charging device can control the converter to switch to the target operating mode after determining the target operating mode according to the charging parameters including at least one parameter including input current, input voltage, output current, and output voltage. , and then charge the device to be charged according to the target working mode.
  • the wireless charging device charges the device to be charged according to the target operating mode
  • the real-time input power may be firstly determined according to the input current and the input voltage; then 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.
  • the wireless charging device charges the device to be charged according to the target operating mode
  • the real-time input power may be first determined as a target charging power, and the input voltage may be determined as a target charging voltage; then the device to be charged may be charged according to the target charging power and the target charging voltage.
  • the power supply device when the DC/DC converter works in CV pumping mode, the power supply device is allowed to actively reduce the power, thus solving the problem The problem of intermittent charging or even failure to charge when the power supply device cannot provide enough power; on the other hand, the power supply device is allowed to work at peak power for a short time to supply power to the device to be charged through a wireless charging device, for example, when DC/DC When the converter works in the CP pumping mode, the output power of the power supply device can be increased to the rated power, so that the charging capability of the power supply device can be fully utilized.
  • the wireless charging method proposed in the embodiment of this application can match the charging parameters of the DC/DC converter with different operating modes. Through the DC/DC converter The control of the working mode can give full play to the ability of the adapter, so that the adapter can 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, the adapter is no longer required.
  • the rated power of the charger must be greater than the peak charging power of the device to be charged, that is, the adapter whose rated power is not large enough can also be charged normally.
  • the target working mode of the converter may also be the CR mode. That is to say, the wireless charging device can also adjust the pumping method of the converter to make it work in CR mode, so that the converter is equivalent to a "controllable resistor" for the front-end power supply unit, and then It can ensure that the charging voltage and charging current of the converter are in the same phase as possible, and cooperate with the front-end circuit of DCX and other applications to obtain a higher power factor (PF) value.
  • PF power factor
  • the DC/DC converter can exist in various forms, including but not limited to Buck circuit, Boost circuit, Buck-Boost circuit, Flybuck, etc., wherein, DC/DC The converter mainly completes the connection and conversion functions between the front-stage power supply and the rear-stage power receiving unit.
  • An embodiment of the present application provides a wireless charging method.
  • the wireless charging device When the wireless charging device performs wireless charging, it detects the charging parameters of the converter; wherein the charging parameters include at least one parameter of input current, input voltage, output current, and output voltage; Determine the target operating mode according to the charging parameters; wherein the target operating mode is used to determine the pumping mode of the converter; control the converter to switch to the target operating mode, and charge the device to be charged according to the target operating mode. That is to say, in the embodiment of the application, the wireless charging device can provide charging voltage and current to the device to be charged; the adapter provides the voltage and current to the wireless charging device, and control the DC/current of the wireless charging device during the charging process.
  • the DC converter works in different pumping modes such as CV and CP to ensure a stable charging process.
  • the charging power is controlled by the DC/DC, and the adapter can provide enough power to meet the needs of the wireless charging device for charging the terminal equipment;
  • the DC/DC works in the CV pumping mode In mode, the charging power is controlled by the adapter. At this time, the adapter is no longer required to provide the maximum charging power, so there will be no problem of interruption of charging.
  • FIG. 5 is a schematic diagram of the realization of wireless charging in the embodiment of the present application.
  • FIG. 6 is a schematic diagram of the realization of wireless charging in the embodiment of the present application.
  • the wireless charging system 20 in the embodiment of the present application includes: a power supply device 210 , a wireless charging device 220 and a device to be charged 230 .
  • the power supply device 210 is configured to provide electric energy to the wireless charging device 220 .
  • the power supply device 210 may include: a rectification circuit, a voltage transformation circuit, a control circuit, and a charging interface, etc., which can convert an AC input into a DC output to provide to the wireless charging device 220 .
  • the power supply device may be an adapter, a power bank, or a vehicle power supply.
  • the power supply device 210 can also directly provide AC power to the wireless charging device 220 .
  • the power supply device 210 may be an AC power source.
  • the wireless charging device 220 also includes a circuit or module for converting the AC power into a DC power, for example, a rectification and filtering circuit, a DC/DC converter, and the like.
  • the wireless charging device 220 is configured to convert the direct current or alternating current provided by the power supply device 210 into an electromagnetic signal for wireless power transmission.
  • the wireless charging device 220 may include a DC/DC converter 221 , a wireless charging transmitting unit 222 and a detection module 223 .
  • a DC/DC converter 221 DC/DC converter
  • a wireless charging transmitting unit 222 DC/DC converter
  • a detection module 223 detection module
  • the power supply device 210 can be a common adapter, a voltage regulating adapter (that is, the adapter itself can adjust the output voltage), or even a mobile power supply.
  • the DC/DC converter 221 is used to perform DC/DC voltage conversion, adjust the output voltage of the power supply device 210 to a fixed voltage value and provide it to the wireless charging transmitting unit 222 .
  • the DC/DC converter 221 may be a boost (Boost) conversion circuit, a step-down (Buck) conversion circuit, a buck-boost (Buck-Boost) conversion circuit or a Flybuck converter etc., which are not specifically limited in the embodiments of the present application.
  • Boost boost
  • Buck step-down
  • Buck-Boost buck-boost
  • Flybuck converter etc.
  • the wireless charging transmitter unit 222 is configured to convert the DC power provided by the DC/DC converter 221 or the DC power provided by the power supply device 210 into an AC power that can be coupled to the transmitting coil, and convert the AC power into an electromagnetic signal through the transmitting coil for transmission.
  • the wireless charging transmitting unit 222 may include: an inverter unit and a resonance unit.
  • the inverter unit may include a plurality of switch tubes, and the transmission power can be adjusted by controlling the conduction time (ie, duty cycle) of the switch tubes.
  • the resonant unit is used to transmit electric energy out.
  • the resonant unit may include a capacitor and a transmitting coil. By adjusting the operating frequency of the resonance unit, the transmission power of the wireless charging transmitting unit 222 can be adjusted.
  • the wireless charging device 220 may be a wireless charging base or a device with an energy storage function.
  • 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 and store electric energy from an external power supply device 210 .
  • the energy storage module can provide electric energy to the wireless charging transmitting unit 222 .
  • the wireless charging device 220 can obtain power from the external power supply device 210 in a wired or wireless manner.
  • a charging interface for example, a Type-C interface or a USB interface, etc.
  • the wireless charging device 220 may further include a wireless charging receiving unit 231 , which may obtain electric energy from a device having a wireless charging function in a wireless manner.
  • the detection module 223 can be used to control the wireless charging process.
  • the detection module 223 can detect at least one of the charging parameters such as the input current, input voltage, output current, and output voltage of the DC/DC converter 221 in real time, so as to realize the DC/DC Real-time monitoring of the charging parameters of the converter 221.
  • the real-time monitoring function of the detection module 223 may be realized through the internal control circuit of the DC/DC converter 221 or through an external controller.
  • 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 .
  • the detection module 223 may be a controller configured inside the wireless charging device 220.
  • the controller monitors charging parameters (such as input voltage, current, etc.), Then control the DC/DC converter 221 to realize the functions of CC, CV, CP, and CR.
  • the wireless charging device 220 may also include other related hardware, logic devices, units and/or codes, so as to realize corresponding functions.
  • the wireless charging device 220 may further include a display unit (for example, a light emitting diode or an LED display), for displaying the charging status (for example, charging in progress or terminated, etc.) in real time during the wireless charging process.
  • a display unit for example, a light emitting diode or an LED display
  • the charging status for example, charging in progress or terminated, etc.
  • the device to be charged 230 includes a wireless charging receiving unit 231 , a charging management module 232 , and a battery 233 .
  • a wireless charging receiving unit 231 receives a wireless charging signal from the external device.
  • a charging management module 232 receives a power signal from the external device.
  • a battery 233 receives a power signal from the external device.
  • FIG. 4 and FIG. Combining certain parts, or different arrangements of parts.
  • the power supply device 210 provides power supply for the wireless charging device 220, the device to be charged 230 is placed on the surface of the wireless charging device 220, and the wireless charging device 220 charges the battery 233 in the device to be charged 230 through electromagnetic induction.
  • 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.
  • wireless communication methods include but are not limited to Bluetooth communication, Wireless Fidelity (Wi-Fi) communication, short-range wireless communication based on high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communications and mobile communications, etc.
  • Wi-Fi Wireless Fidelity
  • short-range wireless communication based on high carrier frequency optical communication
  • ultrasonic communication ultra-wideband communications and mobile communications, etc.
  • the embodiments of the present application do not make specific limitations.
  • the wireless charging receiving unit 231 is configured to convert the electromagnetic signal emitted by the wireless charging transmitting unit 222 of the wireless charging device 220 into alternating current through the receiving coil, and perform operations such as rectification and/or filtering on the alternating current to convert the alternating current into a stable
  • the DC power is provided to charge the battery 233.
  • the wireless charging receiving unit 231 includes: a receiving coil and an AC/DC converting unit.
  • the AC/DC conversion unit is used to convert the alternating current received by the receiving coil into direct current.
  • the battery 233 may include a single cell or multiple cells.
  • the multiple cells are connected in series.
  • the charging voltage that the battery 233 can withstand is the sum of the charging voltages that can be tolerated by multiple cells, which can increase the charging speed and reduce the heat generated during charging.
  • the charging management module 232 is configured to step up or step down the DC power output by the wireless charging receiving unit 231 .
  • Figure 7 is a schematic diagram of the working mode of a common wireless charging device.
  • the current common wireless charging device mainly controls the output to work in the CV mode, and does not control the input load mode of the DC/DC converter, that is, the power supply
  • the device charges the wireless charging device in the working mode of CV output, and the wireless charging device also charges the device to be charged in the working mode of CV output.
  • the embodiment of this application adds the CV, CC, CP of the DC/DC converter. etc. pumping control mode.
  • the CV pumping mode of the DC/DC converter can be controlled by the power supply equipment within a certain controllable range, thereby reducing the dependence of the wireless charging device on the rated power of the power supply equipment.
  • the power supply device is allowed to support the wireless charging device to charge the device to be charged to the best of its ability.
  • the wireless charging device it is precisely because of the control of the working mode of the DC/DC converter that the rated power of the matching power supply equipment is no longer required to be very large, and the wireless charging device only needs to reach the maximum peak power. Charge the device to be charged with the maximum capacity in a short time. When the power of the device to be charged gradually increases, the power supply device gradually returns to the rated rate to support the wireless charging device to charge the device to be charged.
  • Figure 8 shows the wireless charging Schematic diagram 1
  • FIG. 9 is schematic diagram 2 of wireless charging
  • FIG. 10 is schematic diagram 3 of wireless charging.
  • the adapter by detecting the charging parameters of the DC/DC converter (at least one parameter of 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 the wireless terminal is small, and the adapter can meet the charging demand of the wireless charger.
  • the output mode of the adapter is CV mode, and the target working mode of the DC/DC converter can be further determined as CP mode.
  • the charging power provided by the wireless charger to the wireless terminal is relatively small, which is the period of charging with low power and constant power.
  • the power that the adapter can provide can completely meet the requirements of the wireless charger. Therefore, the DC/DC converter of the wireless charger works in CP pumping mode, and the adapter works in CV output mode.
  • the wireless charger by detecting the charging parameters of the DC/DC converter (at least one parameter of 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 peak power corresponding to the wireless terminal is to determine that the real-time charging power of the wireless charger is raised to the power upper limit. If the power provided by the adapter can meet the charging demand of the wireless charger at this time, it can also provide sufficient power 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 working mode of the DC/DC converter is CP mode or CC mode.
  • the charging power of the wireless charger to charge the wireless terminal is increased to the peak power, which is a period of high-power current-limited charging.
  • the adapter enters the short-term maximum power mode.
  • the power provided can meet the maximum power demand of the wireless charger.
  • the DC/DC converter of the wireless charger works in CP pumping mode or CC pumping mode, and the adapter works in CV output mode.
  • the real-time output power of the DC/DC converter is constantly changing. It is determined that the real-time charging power of the wireless charger needs to be gradually increased to the power upper limit value. If the power provided by the adapter does not meet the charging demand of the wireless charger at this time, for example, the real-time output power of the DC/DC converter is still low. Before reaching the peak power corresponding to the wireless terminal, the input voltage of the DC/DC converter begins to decrease, that is, it cannot 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 , correspondingly, the wireless charger can determine that the target working mode of the DC/DC converter is the CV mode.
  • the charging power of the wireless charger to charge the wireless terminal will gradually increase to the peak power, and if the power provided by the adapter to the wireless charging device cannot meet the requirements of the wireless charger
  • the maximum power demand of the adapter 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, correspondingly, the DC/DC converter of the wireless charger switches to work in the CV pumping mode, only For power transfer, it is no longer mandatory to obtain the maximum power from the adapter, but to hand over the control of the charging power to the adapter. This is the period of variable power charging.
  • the charging parameters of the DC/DC converter at least one parameter of input current, input voltage, output current, and output voltage
  • the peak power 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 demand of the wireless charger, and provide charging power that meets the power upper limit for a period of time Afterwards, the adapter cannot continue to provide the maximum power, and needs to enter the power reduction period, that is, it needs to reduce the power to ensure its own stable operation.
  • the input voltage of the DC converter begins to decrease, so the output mode will be switched from the CV mode to the CC mode, and accordingly, the wireless charger can determine that the target operating mode of the DC/DC converter is the CV mode.
  • the charging power of the wireless charger to charge 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
  • the adapter will enter the power reduction period and switch to the CC output mode.
  • the DC/DC converter of the wireless charger switches to work in the CV pumping mode. It is only used for power transfer. It is no longer mandatory to obtain the maximum power from the adapter, but to give the control of the charging power to the adapter. This is the period of variable power charging.
  • the adapter after the fast charging works for a period of time, the adapter cannot continue to provide the maximum power at this time, and needs to reduce the power to ensure its stable operation, so the adapter will enter the power reduction period. At this time, the adapter reduces the output current. Enter the CC output mode; and the target working mode of the DC/DC converter of the wireless charger is switched to the CV pumping mode, and the charging power is determined by the output power of the adapter. Specifically, when the DC/DC converter is working in the CV pumping 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 transmission, and the maximum power is no longer mandatory.
  • the DC/DC converter working in the CV load mode can avoid the abnormal operation of the charging system triggered by the traditional DC/DC load mode due to the inability to meet the power reduction requirements of the adapter (undervoltage protection or over-current protection, etc.), which solves the problem of intermittent charging or even failure to charge.
  • the wireless charger can meet the needs of the wireless charger for wireless charging to the wireless terminal.
  • the output mode of the adapter is CV mode, correspondingly, the wireless charger can determine that the target working mode of the DC/DC converter is the CP mode.
  • the charging power required by the wireless terminal gradually decreases.
  • the charging power provided by the charger to the wireless terminal will gradually decrease.
  • the pumping power of the wireless charger will also gradually decrease.
  • the output mode of the power supply device is CV mode.
  • the wireless charger can determine the power of the converter.
  • the target working mode is CP mode.
  • 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.
  • Figure 11 is a schematic diagram of the working mode control during the charging process
  • Figure 12 is the working mode during the charging process Control diagram II.
  • the output mode of the adapter by detecting the charging parameters (input current, input voltage, output current, and output voltage) of the mobile power supply, when it is determined that the adapter can meet the charging requirements of the mobile power supply, the output mode of the adapter If it is CV mode, further determine that the target operating mode of the mobile power supply is CC mode; when it is determined that the adapter cannot meet the charging requirements of the mobile power supply, the output mode of the adapter is CC mode, and further determine that the target operating mode of the mobile power supply is CV mode.
  • the output mode of the adapter by detecting the charging parameters of the mobile power supply (at least one parameter of input current, input voltage, output current, and output voltage), when it is determined that the adapter can meet the charging requirements of the mobile power supply, the output mode of the adapter If it is CV mode, it is also possible to determine that the target operating mode of the mobile power supply is CP mode; when it is determined that the adapter cannot meet the charging requirements of the mobile power supply, the output mode of the adapter is CC mode, and further determine that the target operating mode of the mobile power supply is CV mode.
  • the adapter for the mobile power supply, if the power provided by the adapter to the wireless charging device is insufficient when charging the mobile phone, the adapter is allowed to automatically control the power, that is, the adapter is allowed to output from the CV The mode is switched to CC output mode, correspondingly, the power bank no longer forcibly obtains the maximum power from the adapter at this time.
  • the adjustment method of the pumping 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 realizes that when the rated power of the power supply device is insufficient, allowing It "as much power as possible", which can reduce the dependence on the rated charging power of the power supply equipment.
  • An embodiment of the present application provides a wireless charging method.
  • the wireless charging device When the wireless charging device performs wireless charging, it detects the charging parameters of the converter; wherein the charging parameters include at least one parameter of input current, input voltage, output current, and output voltage; Determine the target operating mode according to the charging parameters; wherein the target operating mode is used to determine the pumping mode of the converter; control the converter to switch to the target operating mode, and charge the device to be charged according to the target operating mode. That is to say, in the embodiment of the application, the wireless charging device can provide charging voltage and current to the device to be charged; the adapter provides the voltage and current to the wireless charging device, and control the DC/current of the wireless charging device during the charging process.
  • the DC converter works in different pumping modes such as CV and CP to ensure a stable charging process.
  • the charging power is controlled by the DC/DC, and the adapter can provide enough power to meet the needs of the wireless charging device for charging the terminal equipment;
  • the DC/DC works in the CV pumping mode In mode, the charging power is controlled by the adapter. At this time, the adapter is no longer required to provide the maximum charging power, so there will be no problem of interruption of charging.
  • FIG. 13 is a schematic diagram of the composition and structure of the wireless charging device proposed in the embodiment of the present application.
  • the wireless charging device 30 proposed in the embodiment of the present application may include A processor 31, a memory 32 storing instructions executable by the processor 31, a detection module 33,
  • the detection module 33 is configured 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 31 is configured to determine a target operating mode according to the charging parameters; wherein, the target operating mode is used to determine the pumping mode of the converter; control the converter to switch to the target operating mode mode, to charge the device to be charged based on the target operating mode.
  • the processor 31 is also configured to determine the real-time charging power according to the output current and the output voltage; and if the real-time charging power is less than a preset power threshold, determine the target operating mode as Fixed power CP mode.
  • the processor 31 is also configured to determine the real-time input power according to the input current and the input voltage; simultaneously determine the real-time charging power according to the output current and the output voltage; and if the real-time charging If the power is equal to the real-time input power, and the real-time charging power is equal to the power upper limit value, then the target working mode is determined as the CP mode.
  • the processor 31 is further configured to determine the historical input current, historical input voltage, historical output current and historical output voltage of the converter before determining the target operating mode according to the charging parameters.
  • the processor 31 is also configured to determine the real-time input power according to the input current and the input voltage; simultaneously determine the real-time charging power according to the output current and the output voltage; and if the real-time charging If the 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 is determined as the constant voltage CV mode.
  • the processor 31 is further configured to determine the target working mode as the CP mode if the output current is smaller than the historical output current and the input current is smaller than the historical input current.
  • the processor 31 is also configured to determine the real-time input power according to the input current and the input voltage; and determine the real-time input power as the target charging power, and charge the to charge the device to be charged.
  • the processor 31 is also configured to determine the real-time input power as a target charging power, determine the input voltage as a target charging voltage; The device to be charged is charged.
  • the detection module 33 is further configured to detect the charging parameter through a control circuit set by the converter; or detect the charging parameter through a controller.
  • the above processor 31 may be an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a digital signal processor (Digital Signal Processor, DSP), a digital signal processing device (Digital Signal Processing Device, DSPD ), Programmable Logic Device (ProgRAMmable Logic Device, PLD), Field Programmable Gate Array (Field ProgRAMmable Gate Array, FPGA), Central Processing Unit (Central Processing Unit, CPU), controller, microcontroller, microprocessor at least one of .
  • ASIC Application Specific Integrated Circuit
  • DSP Digital Signal Processor
  • DSPD Digital Signal Processing Device
  • PLD Programmable Logic Device
  • Field Programmable Gate Array Field ProgRAMmable Gate Array
  • FPGA Field ProgRAMmable Gate Array
  • CPU Central Processing Unit
  • controller microcontroller, microprocessor at least one of .
  • 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 codes, the program codes include computer operation instructions, and the memory 32 may include a high-speed RAM memory, or may Also included is non-volatile memory, eg, at least two disk memories.
  • 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 communicate with each other among these devices.
  • the memory 32 is configured to store instructions and data.
  • the above-mentioned memory 32 can be a volatile memory (volatile memory), such as a random access memory (Random-Access Memory, RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory (Read-Only Memory, ROM), flash memory (flash memory), hard disk (Hard Disk Drive, HDD) or solid-state hard drive (Solid-State Drive, SSD); Provide instructions and data.
  • volatile memory such as a random access memory (Random-Access Memory, RAM)
  • non-volatile memory such as a read-only memory (Read-Only Memory, ROM), flash memory (flash memory), hard disk (Hard Disk Drive, HDD) or solid-state hard drive (Solid-State Drive, SSD); Provide instructions and data.
  • each functional module in this embodiment may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software function modules.
  • the integrated unit is implemented in the form of a software function module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of this embodiment is essentially or The part contributed by the prior art or the whole or part of the technical solution can be embodied in the form of software products, the computer software products are stored in a storage medium, and include several instructions to make a computer device (which can be a personal A computer, a server, or a network device, etc.) or a processor (processor) executes all or part of the steps of the method of this embodiment.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read only memory (Read Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other various media that can store program codes.
  • FIG. 14 is a schematic diagram 2 of the composition and structure of the wireless charging device proposed in the embodiment of the present application.
  • the wireless charging device 30 proposed in the embodiment of the present application may also include a wireless charging transmitter The unit 36, the converter 37, and the inverter unit 38, wherein 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-mentioned embodiments.
  • the wireless charging transmitting unit 36 can be the wireless charging transmitting unit 121 in the above-mentioned FIG. 1 or the wireless charging transmitting unit 222 in the above-mentioned FIG.
  • the voltage and output current are converted into wireless charging signals (electromagnetic signals) for transmission.
  • the converter 37 can be the DC/DC converter 122 in the above-mentioned FIG. 2 or the DC/DC converter 221 in the above-mentioned FIG.
  • the fixed voltage is scaled.
  • the inverter unit 38 may be the inverter 123 in FIG. 2 above, and is used to convert the DC voltage (Vsdc) into the AC voltage (Vsac).
  • An embodiment of the present application provides a wireless charging device, which detects 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 ; Determine the target operating mode according to the charging parameters; wherein, the target operating mode is used to determine the pumping mode of the converter; control the converter to switch to the target operating mode, and charge the device to be charged according to the target operating mode. That is to say, in the embodiment of this application, the DC/current of the wireless charging device can be controlled during the charging process according to the voltage and current provided by the wireless charging device to the device to be charged; the voltage and current provided by the adapter to the wireless charging device.
  • the DC converter works in different pumping modes such as CV and CP to ensure a stable charging process.
  • the charging power is controlled by the DC/DC, and the adapter can provide enough power to meet the needs of the wireless charging device for charging the terminal equipment; when the DC/DC works in the CV pumping mode In mode, the charging power is controlled by the adapter. At this time, the adapter is no longer required to provide the maximum charging power, so there will be no problem of interruption of charging.
  • An embodiment of the present application provides a computer-readable storage medium on which a program is stored, and when the program is executed by a processor, the above wireless charging method is implemented.
  • the program instructions corresponding to a wireless charging method in this embodiment can be stored on a storage medium such as an optical disc, a hard disk, or a USB flash drive.
  • a storage medium such as an optical disc, a hard disk, or a USB flash drive.
  • the charging parameters include at least one parameter of input current, input voltage, output current, and output voltage;
  • the target operating mode is used to determine a pumping mode of the converter
  • the converter is controlled to switch to the target operation mode, so as to charge the device to be charged based on the target operation mode.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) having computer-usable program code embodied therein.
  • a computer-usable storage media including but not limited to disk storage and optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in implementing one or more procedures of the flowchart and/or one or more blocks of the block diagram.
  • the wireless charging device can provide charging voltage and current to the device to be charged; the voltage and current provided by the adapter to the wireless charging device can control the operation of the DC/DC converter of the wireless charging device during the charging process.
  • different pumping modes such as CV and CP
  • the charging power is controlled by the DC/DC.
  • the adapter can provide enough power to meet the needs of the wireless charging device for charging the terminal equipment; when the DC/DC converter works in the CV pumping mode In mode, the charging power is controlled by the adapter.
  • the adapter is no longer required to provide the maximum charging power, so that there will be no problem of interruption of charging; improve the intelligence and stability of wireless charging.

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Abstract

本申请实施例公开了一种无线充电方法、装置及存储介质，所述方法包括：在进行无线充电时，检测转换器的充电参数；其中，充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；根据充电参数，确定目标工作模式；其中，目标工作模式用于确定所述转换器的抽载方式；控制转换器切换至目标工作模式，并根据目标工作模式向待充电设备充电。

Description

无线充电方法、装置及存储介质
相关申请的交叉引用
本申请基于申请号为202110540847.9、申请日为2021年5月18日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及无线充电技术领域，尤其涉及一种无线充电方法、装置及存储介质。
背景技术
一般情况下，在充电过程中，无线充电装置上的DC/DC转换器以恒压(Constant Voltage，CV)模式或固定功率(Constant Power，CP)模式给逆变单元供电，以CP模式或者恒流(Constant Current，CC)模式从前级适配器获取功率。这时，需要前级适配器工作在CV模式才能保证无线充电装置的稳定工作。
然而，如果适配器的额定功率不够大，则无线充电装置在提升充电功率的时候会发生断充的问题，而如果增大适配器的额定功率，又会在充电过程中造成适配器功率的浪费。可见，现有的无线充电方法，智能性低，稳定性差。
发明内容
本申请实施例提供了一种无线充电方法、装置及存储介质。
本申请实施例的技术方案是这样实现的：
第一方面，本申请实施例提供了一种无线充电方法，所述方法包括：
在进行无线充电时，检测转换器的充电参数；其中，所述充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；
根据所述充电参数，确定目标工作模式；其中，所述目标工作模式用于确定所述转换器的抽载方式；
控制所述转换器切换至所述目标工作模式，以基于所述目标工作模式向待充电设备充电。
第二方面，本申请实施例提供了一种无线充电装置，所述无线充电装置包括：处理器、存储有所述处理器可执行指令的存储器、检测模块，
所述检测模块，被配置为在进行无线充电时，检测转换器的充电参数；其中，所述充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；
所述处理器，被配置为根据所述充电参数，确定目标工作模式；其中，所述目标工作模式用于确定所述转换器的抽载方式；控制所述转换器切换至所述目标工作模式，以基于所述目标工作模式向待充电设备充电。
第三方面，本申请实施例提供了一种无线充电装置，所述无线充电装置包括： 无线充电发射单元，转换器，逆变单元；所述无线充电装置用于实现如第一方面所述的无线充电方法。
第四方面，本申请实施例提供了一种计算机可读存储介质，其上存储有程序，应用于无线充电装置中，所述程序被处理器执行时，实现如第一方面所述的无线充电方法。
附图说明
图1为一种无线充电系统的示意图；
图2为一种无线充电方式的实现示意图；
图3为本申请实施例提出的无线充电方法的实现流程示意图一；
图4为本申请实施例提出的无线充电方法的实现流程示意图二；
图5为本申请实施例中无线充电的实现示意图一；
图6为本申请实施例中无线充电的实现示意图二；
图7为常见的无线充电装置的工作模式示意图；
图8为无线充电的示意图一；
图9为无线充电的示意图二；
图10为无线充电的示意图三；
图11为充电过程中的工作模式控制示意图一；
图12为充电过程中的工作模式控制示意图二；
图13为本申请实施例提出的无线充电装置的组成结构示意图一；
图14为本申请实施例提出的无线充电装置的组成结构示意图二。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。可以理解的是，此处所描述的具体实施例仅用于解释相关申请，而非对该申请的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与有关申请相关的部分。
在现有技术中，图1为一种无线充电系统的示意图，如图1所示，无线充电系统10包括电源提供设备110、无线充电装置120以及待充电设备130，其中，电源提供设备110例如可以是适配器，无线充电装置120例如可以是无线充电底座，待充电设备130例如可以是终端。
电源提供设备110与无线充电装置120连接之后，电源提供设备110的输出电压和输出电流可传输至无线充电装置120。
无线充电装置120可以通过内部的无线充电发射单元121将电源提供设备110的输出电压和输出电流转换成无线充电信号(电磁信号)进行发射。例如，该无线充电发射单元121可以将电源提供设备110的输出电流转换成交流电，并通过发射线圈或发射天线将该交流电转换成无线充电信号。
待充电设备130可以通过无线充电接收单元131接收无线充电发射单元121发射的无线充电信号，并将该无线充电信号转换成无线充电接收单元131的输出电压和输出电流。例如，该无线充电接收单元131可以通过接收线圈或接收天线将无线充电发射单元121发射的无线充电信号转换成交流电，并对该交流电进行整流和/或滤波等操作，将该交流电转换成无线充电接收单元131的输出电压和输出电流。
无线充电(wireless power)技术源于无线电能传输技术，目前，无线充电功能越来越普及，充电功率也越来越高。相应的，无线充电装置也越来越普及，功率也越来越大。同时，对给无线充电装置供电的适配器的要求也越来越高。例如，目前手机无线充电功率已经达到了80W，而配套的适配器功率需要在100W以上。另外，现阶段国内主流品牌手机厂商的无线充电功率普遍在40W～60W左右，一般采用额定功率远大于无线充电功率的适配器配套充电。
图2为一种无线充电方式的实现示意图，如图2所示，无线充电装置120自直流(Direct Current，DC)电源设备110接收固定电压。DC/DC转换器122缩放该固定电压并将缩放后的固定电压施加至逆变器123，该逆变器123例如可以是直流转交流(Direct Current-Alternating Current，DC-AC)逆变器，用来将直流电压(Vsdc)转换为交流电压(Vsac)。逆变器123连同发射器匹配网络一起在发射器线圈中产生交流(Alternating Current，AC)电流。发射器线圈中的AC电流根据安培定律来产生振荡磁场。该振荡磁场根据法拉第定律将AC电压感应至已调谐好的接收器线圈(位于待充电设备130中)。
DC/DC的意思是直流变直流(即不同直流电源值的转换)，若通过一个转换器能将一个直流电压(3.0V)转换成其他的直流电压(1.5V或5.0V)，那么可以称这个转换器为DC/DC转换器，或称之为开关电源或开关调整器。
一般情况下，在充电过程中，无线充电装置上的DC/DC以恒压(Constant Voltage，CV)模式或固定功率(Constant Power，CP)模式给逆变单元供电，以CP模式或者恒流(Constant Current，CC)模式从前级适配器获取功率。这时，需要前级适配器工作在CV模式才能保证无线充电装置的稳定工作。这就要求适配器的额定功率一定要大于无线充电装置获取的最大峰值功率，否则会出现断充甚至无法充电的问题。但是随着充电过程的持续，手机电量逐渐增加，充电功率逐渐减小，适配器进入轻载模式，其充电能力远远没有发挥出来。
在本申请的一些实施例中，一方面，随着智能终端产品的充电功率越来越大，对应的适配器的输出功率也越来越大。但是由于大部分终端产品在充电一段时间后会降低充电功率，此时对适配器的功率需求会逐渐下降，如果适配器的额定功率设计成终端产品需求的最大功率上，势必会造成大大的浪费，即适配器的输出能力远远没有发挥出来。
另一方面，对于给无线充电装置供电的适配器来说，由于无线充电装置工作在CC或者CP抽载方式，并且无线充电系统效率较低，因此配套的适配器需要更大的额定输出功率才能保证无线充电装置能够获得最大的峰值功率给终端设备充电。如果适配器的额定功率不够大，无线充电装置在提升充电功率的时候，可能出现充电断续甚至无法充电的问题。
目前常见的无线充电方法，如果适配器的额定功率不够大，则无线充电装置在提升充电功率的时候会发生断充的问题，而如果增大适配器的额定功率，又会在充电过程中造成适配器功率的浪费。可见，现有的无线充电方法，智能性低，稳定性差。
为了解决上述问题，本申请提出一种无线充电方法，可以控制无线充电装置的DC/DC转换器工作在CV、CP等不同的抽载模式，并且可以在CV、CP等不同工作模式中无缝切换。依据无线充电装置给终端设备的充电功率、适配器向无线充电装置提供的充电功率，在充电过程中无缝完成此三种模式的切换，保证稳定的充电过程。当DC/DC工作在CP抽载模式时，充电功率由DC/DC控制，此时适配器能够提供足够的功率满足无线充电装置给终端设备充电的需求。
在本申请的一些实施例中，可以根据无线充电装置给待充电设备进行充电的电压、电流，适配器向无线充电装置提供的电压、电流，在充电过程中控制无线充电装置的DC/DC转换器工作在CV、CP等不同的抽载模式，保证稳定的充电过程。当DC/DC工作在CP抽载模式时，充电功率由DC/DC控制，此时适配器能够提供足够的功率满足无线充电装置给终端设备充电的需求；当DC/DC工作在CV抽载模式时，充电功率由适配器控制，此时不再强制要求适配器提供最大充电功率，进而不会产生断充的问题。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
本申请一实施例提供了一种无线充电方法，图3为本申请实施例提出的无线充电方法的实现流程示意图一，如图3所示，在本申请的实施例中，无线充电装置进行无线充电的方法可以包括以下步骤：
步骤101、在进行无线充电时，检测转换器的充电参数；其中，充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数。
在本申请的实施例中，无线充电装置在进行无线充电时，可以先检测转换器对应的充电参数，其中，充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数。具体地，无线充电装置可以检测转换器的输入电流、输入电压、输出电流以及输出电压中的一个或多个参数。
进一步地，在本申请的实施例中，无线充电装置可以配置有转换器，其中，在进行无线充电时，无线充电装置可以通过转换器将一个直流电压转换成其他的直流电压，即无线充电装置配置的转换器可以为DC/DC转换器。
需要说明的是，在本申请的实施例中，无线充电装置可以为无线充电系统中的组成部分，在本申请的一些实施例中，无线充电系统还可以包括待充电设备和电源设备，其中，电源设备可以用于对无线充电装置进行充，电无线充电装置可以通过与待充电设备建立无线连接来向待充电设备进行无线充电。例如，电源设备可以为适配器、电源等设备，无线充电装置可以为充电底座等设备；待充电设备可以为手机、游戏机等设备。
在本申请的一些实施例中，待充电设备可以为任何具备通信和存储功能的终端，例如：平板电脑、手机、电子阅读器、遥控器、个人计算机(Personal Computer，PC)、笔记本电脑、车载设备、网络电视、可穿戴设备、个人数字助理(Personal Digital Assistant，PDA)、便捷式媒体播放器(Portable Media Player，PMP)、导航装置等终端。
需要说明的是，电源设备为无线充电装置提供供电电源，同时，无线充电装置和待充电设备之间采用无线通信技术，通过电磁感应实现为待充电设备中的电池充电。
进一步地，在本申请的实施中，待充电设备进行无线充电之前，可以先与无线充电装置建立无线连接并进行双向通信，以实现无线充电。
需要说明的是，在本申请的实施例中，电源设备和待充电设备也可以建立无线通信，从而可以实现数据的双向传输。
进一步地，在本申请的实施例中，电源设备可以用于对无线充电装置进行充电；在本申请的一些实施例中，电源设备与无线充电装置可以通过通用串行总线(Universal Serial Bus，USB)接口相连，该USB接口可以是普通的USB接口，也可以是micro USB接口或Type C接口等。USB接口中的电源线用于电源设备为无线充电装置充电，其中，USB接口中的电源线可以是USB接口中的VBus 线和/或地线。USB接口中的数据线用于电源设备和无线充电装置进行双向通信，该数据线可以是USB接口中的D+线和/或D-线，所谓双向通信可以指电源设备和无线充电装置双方进行信息的交互。
进一步地，在本申请的实施例中，电源设备可以支持普通充电模式和快速充电模式，其中，快速充电模式的充电流大于普通充电模式的充电流，即快速充电模式的充电速度大于所述普通充电模式的充电速度。
在本申请的一些实施例中，电源设备可以与无线充电装置中的转换器连接，因此，电源设备向无线充电装置实时输出的电压，就是转换器的输入电压。在本申请的一些实施例中，无线充电装置可以通过转换器对电源设备实时输出的电压，即转换器的输入电压进行电压转换，从而获得并提供输出电压。
相应地，在本申请中，正是由于电源设备与无线充电装置中的转换器连接，因此，电源设备向无线充电装置实时输出的电流，就是转换器的输入电流。
进一步地，在本申请的实施例中，电源设备在向无线充电装置进行无线充电时，电源设备的输出模式可以为恒流CC模式，也可以为恒压CV模式。
其中，工作在CC模式即为电源设备以提供稳定电流为目的定电流输出。在本申请的一些实施例中，当电源设备工作在CC模式下时，为了保证输出稳定的电流，如果输出的功率增大，则输出的电压增大，如果输出的功率减小，则输出的电压减小。
其中，工作在CV模式即为电源设备以提供稳定电压为目的定电压输出。在本申请的一些实施例中，当电源设备工作在CV模式下时，为了保证输出稳定的电压，如果输出的功率增大，则输出的电流增大，如果输出的功率减小，则输出的电流减小。
进一步地，在本申请的实施例中，电源设备在向无线充电装置进行无线充电时，无线充电装置的抽载模式可以为恒流CC模式、固定功率CP模式、恒压CV模式等。
其中，工作在CC模式即为无线充电装置以获取稳定电流为目的定电流抽载。具体地，当无线充电装置工作在CC模式下时，为了保证获取稳定的电流，如果待充电设备需要的功率增大，那么无线充电设备获取的电压增大，如果待充电设备需要的功率减小，那么无线充电设备获取的电压减小。
其中，工作在CV模式即为无线充电装置以获取稳定电压为目的定电压抽载。具体地，当无线充电装置工作在CV模式下，且电源设备提供的额定功率可以满足无线充电装置对待充电设备无线充电的最大功率时，为了保证获取稳定的电压，如果待充电设备需要的功率增大，那么无线充电设备获取的电流增大，如果待充电设备需要的功率减小，那么无线充电设备获取的电流减小。
其中，工作在CP模式即为无线充电装置以获取稳定功率为目的定功率抽载。在本申请的一些实施例中，当无线充电装置工作在CP模式下，且电源设备工作在CV模式下时，为了保证获取稳定的功率，如果待充电设备需要的功率增大，那么无线充电设备获取的电流增大，如果待充电设备需要的功率减小，那么无线充电设备获取的电流减小。
进一步地，在本申请的实施例中，无线充电装置可以通过所述转换器设置的控制电路检测所述输入电流、所述输入电压、所述输出电流以及所述输出电压；或者，无线充电装置还可以通过控制器检测所述输入电流、所述输入电压、所述输出电流以及所述输出电压。
也就是说，在本申请中，无线充电装置可以使用多种方式检测转换器的输入 电流、输入电压、输出电流、输出电压等充电参数。在本申请的一些实施例中，无线充电装置即可以直接通过转换器进行充电参数的监测和采集，也可以通过配置的控制器进行充电参数的监测和采集。本申请不进行具体限定。
示例性的，在本申请中，DC/DC转换器内部可以设置有控制电路，该控制电路可以对DC/DC转换器的充电参数进行检测。
示例性的，在本申请中，无线充电装置还可以在DC/DC转换器外部配置控制器，该控制器可以对DC/DC转换器的充电参数进行检测。
步骤102、根据充电参数，确定目标工作模式；其中，目标工作模式用于确定转换器的抽载方式。
在本申请的实施例中，无线充电装置在检测转换器的、包括有输入电流、输入电压、输出电流以及输出电压等至少一个参数的充电参数之后，可以进一步根据充电参数，确定出目标工作模式。
可以理解的时，在本申请中，目标工作模式即为无线充电装置中的转换器为了适应充电参数所确定的抽载方式，其中，目标工作模式可以包括但不限于以下抽载模式中的任意模式：CC模式、CV模式、CP模式、固定电阻CR模式。
示例性的，在本申请的实施例中，抽载方式即为无线充电装置从电源设备中获取功率的方式。例如，当目标工作模式为CP模式时，确定转换器的抽载方式为同功率方式，即转换器按照恒定的功率从电源设备中抽取功率，当电源设备提供的电压增大时，转换器“吃电”的电流相应地减小，当电源设备提供的电压减小时，转换器“吃电”的电流相应地增大，以保证功率的恒定；当目标工作模式为CV模式时，确定转换器的抽载方式为同电压方式，即转换器按照恒定的电压从电源设备中抽取功率，当电源设备提供的电流增大时，转换器获取的功率相应地增大，当电源设备提供的电流减小时，转换器获取的功率相应地减小；当目标工作模式为CC模式时，确定转换器的抽载方式为同电流方式，即转换器按照恒定的电流从电源设备中抽取功率，当电源设备提供的电压减小时，转换器获取的功率相应地减小，当电源设备提供的电压增大时，转换器获取的功率相应地增大；当目标工作模式为CR模式时，确定转换器的抽载方式为电压与电流的比值恒定的方式，即转换器按照恒定的电压与电流的比值从电源设备中抽取功率。
需要说明的是，在本申请的实施例中，对于不同的充电时期，无线充电装置需要向待充电设备提供的充电功率是不同的，相应地，对于不同的充电时期，无线充电装置所检测到的充电参数也是不同的，因此，基于输入电流、输入电压、输出电流以及输出电压等充电参数所确定目标工作模式会随着充电时间的变化而不同。
可选地，在本申请中，无线充电装置在根据包括有输入电流、输入电压、输出电流以及输出电压等至少一个参数的充电参数，确定目标工作模式时，可以先根据所述输出电流和所述输出电压确定实时充电功率；如果实时充电功率小于预设功率阈值，则将目标工作模式确定为固定功率CP模式。
在本申请的一些实施例中，无线充电装置可以先根据检测到的输出电流和输出电压，确定出向待充电设备进行无线充电的充电功率，即实时充电功率，然后再将实时充电功率与预先设置的阈值，即预设功率阈值进行比较，从而根据比较结果确定出与充电参数对应的转换器的目标工作模式。
需要说明的是，在本申请中，预设功率阈值可以为无线充电装置预先设置的、用于对转换器的工作模式进行选择的一个具体数值。示例性的，无线充电装置可以按照待充电设备对应的充电峰值功率对预设功率阈值进行设置，例如，设置预 设功率阈值等于该充电峰值功率，或者，设置预设功率阈值等于该充电峰值功率的1/2。
示例性的，在本申请中，充电初期，如果无线充电装置检测到的输出电流为1A，输出电压为5V，此时无线充电装置的实时充电功率较小，为5W，电源设备所提供的功率能够满足此时无线充电装置的充电需求，电源设备的输出模式为CV模式，相应地，无线充电装置可以确定转换器的目标工作模式为CP模式。
也就是说，在本申请中，对于充电初期，无线充电装置提供给待充电设备的充电功率较小，电源设备能够提供的功率可以满足无线充电装置向待充电设备进行无线充电的需求，此时，电源设备工作在CV输出模式，无线充电装置的DC/DC转换器工作在CP抽载模式。
可选地，在本申请中，无线充电装置在根据包括有输入电流、输入电压、输出电流以及输出电压等至少一个参数的充电参数，确定目标工作模式时，可以先根据输入电流和输入电压确定电源设备提供的充电功率，即实时输入功率，同时可以根据输出电流和输出电压确定实时充电功率；如果实时充电功率等于实时输入功率，且实时充电功率等于功率上限值，则将目标工作模式确定为CP模式。
在本申请的一些实施例中，无线充电装置可以根据检测到的输出电流和输出电压，确定出向待充电设备进行无线充电的充电功率，即实时充电功率，同时，还可以根据检测到的输入电流和输入电压，确定电源设备传输的充电功率，即实时输入功率，然后再将实时充电功率与实时输入功率进行比较，同时将实时充电功率与预先设置的功率上限值进行比较，从而根据比较结果确定出与充电参数对应的转换器的目标工作模式。
需要说明的是，在本申请中，功率上限值可以为无线充电装置向待充电设备充电的最大功率值，即为待充电设备对应的充电峰值功率。例如，待充电设备进行无线充电时的最大功率值，即功率上限值为65W(10V/6.5A)。
示例性的，在本申请中，随着充电时间的增加，无线充电装置进入快充期，此时无线充电装置的实时充电功率提升到功率上限值，为65W，如果电源设备所提供的功率能够满足此时无线充电装置的充电需求，即电源设备在短时间内也可以提供满足65W的充电功率，那么电源设备的输出模式为CV模式，相应地，无线充电装置可以确定转换器的目标工作模式为CP模式。
也就是说，在本申请中，对于快充期，无线充电装置提供给待充电设备的充电功率达到峰值功率，即实时充电功率等于功率上限值，如果电源设备提供的功率也可以满足无线充电装置向待充电设备进行无线充电的需求，那么电源设备工作在CV输出模式，无线充电装置的DC/DC转换器工作在CP抽载模式。
进一步地，在申请的实施例中，图4为本申请实施例提出的无线充电方法的实现流程示意图二，如图4所示，无线充电装置在根据充电参数，确定目标工作模式之前，即步骤102之前，无线充电装置进行无线充电的方法还可以包括以下步骤：
步骤104、确定转换器的历史输入电流、历史输入电压、历史输出电流以及历史输出电压。
在本申请的实施例中，无线充电装置可以不断地对转换器的包括有输入电流、输入电压、输出电流以及输出电压等至少一个参数的充电参数进行检测，从而可以获得转换器在每一个时刻下所对应的充电参数。其中，相较于输入电流、输入电压、输出电流以及输出电压，上一个时刻检测获得的充电参数即为历史输入电流、历史输入电压、历史输出电流以及历史输出电压。
需要说明的是，在本申请的实施例中，无线充电装置可以对充电参数进行实时检测，并对检测到的充电参数进行存储。具体地，无线充电装置在相邻的第一时刻t1和第二时刻t2(t2大于t1)检测到包括有输入电流、输入电压、输出电流以及输出电压等充电参数，可以将第一时刻t1对应的输入电流、输入电压、输出电流以及输出电压作为历史输入电流、历史输入电压、历史输出电流以及历史输出电压进行存储，将第二时刻t2对应的输入电流、输入电压、输出电流以及输出电压作为实时充电参数，在下一个连续时刻，如第三时刻t3(t3大于t2)检测到包括有输入电流、输入电压、输出电流以及输出电压等充电参数之后，可以使用第二时刻t2对应的充电参数覆盖第一时刻t1对应的充电参数，即将第二时刻t2对应的输入电流、输入电压、输出电流以及输出电压作为历史输入电流、历史输入电压、历史输出电流以及历史输出电压进行存储，将第三时刻t3对应的输入电流、输入电压、输出电流以及输出电压作为实时充电参数。
可选地，在本申请中，无线充电装置在根据包括有输入电流、输入电压、输出电流以及输出电压等至少一个参数的充电参数，确定目标工作模式时，可以先根据输入电流和输入电压确定电源设备提供的充电功率，即实时输入功率，同时可以根据输出电流和输出电压确定实时充电功率；如果实时充电功率大于或者等于实时输入功率，且历史输入电压大于输入电压，那么可以将目标工作模式确定为恒压CV模式。
在本申请的一些实施例中，无线充电装置可以根据检测到的输出电流和输出电压，确定出向待充电设备进行无线充电的充电功率，即实时充电功率，同时，还可以根据检测到的输入电流和输入电压，确定电源设备传输的充电功率，即实时输入功率，然后再将实时充电功率与实时输入功率进行比较，同时将历史输入电压与输入电压进行比较，从而根据比较结果确定出与充电参数对应的转换器的目标工作模式。
需要说明的是，在本申请中，如果历史输入电压大于输入电压，可以认为电源设备无法向无线充电装置提供足够大的功率，为了保证自身的稳定工作，电源设备从CV输出模式切换至CC输出模式。
示例性的，在本申请中，随着充电时间的增加，无线充电装置进入快充期，无线充电装置的实时充电功率需要逐步提升至功率上限值，为65W，假设此时无线充电装置的实时充电功率提升至60W，如果电源设备所提供的功率不能够满足此时无线充电装置的充电需求，即电源设备的额定功率无法达到65W，甚至无法达到60W，那么电源设备为了维护自身的稳定工作，会将输出模式从CV模式切换至CC模式，相应地，无线充电装置可以确定转换器的目标工作模式为CV模式。
也就是说，在本申请中，对于快充期，无线充电装置提供给待充电设备的充电功率达到峰值功率，即实时充电功率等于功率上限值，如果电源设备提供的功率无法满足无线充电装置向待充电设备进行无线充电的需求，即电源设备的额定功率小于功率上限值，那么电源设备需要从CV输出模式切换至CC输出模式，无线充电装置的DC/DC转换器工作在CV抽载模式。
相应地，在本申请中，对于快充期，无线充电装置提供给待充电设备的充电功率向峰值功率逐渐提升，即实时充电功率小于或者等于功率上限值，如果电源设备提供的功率无法满足无线充电装置向待充电设备进行无线充电的需求，即电源设备的额定功率小于功实时充电功率，那么电源设备需要从CV输出模式切换至CC输出模式，无线充电装置的DC/DC转换器工作在CV抽载模式。
示例性的，在本申请中，随着充电时间的增加，无线充电装置进入稳定期，此时无线充电装置的实时充电功率提升到功率上限值，为65W，而电源设备在按照65W的功率满足了无线充电装置的充电需求一段时间之后，不能继续提供最大功率，需要进入降功率期，即需要降低功率保证自身的稳定工作，因此会将输出模式从CV模式切换至CC模式，相应地，无线充电装置可以确定转换器的目标工作模式为CV模式。
也就是说，在本申请中，对于稳定期，无线充电装置提供给待充电设备的充电功率达到峰值功率，即实时充电功率等于功率上限值，如果电源设备所提供的功率能够满足无线充电装置向待充电设备进行无线充电的需求，且基于功率上限值向无线充电装置提供功率一段时间之后，电源设备需要进入降功率期，从CV输出模式切换至CC输出模式，无线充电装置的DC/DC转换器工作在CV抽载模式。
需要说明的是，在本申请的实施例中，当无线充电装置的目标工作模式为CV模式，即DC/DC转换器工作在CV抽载模式下时，无线充电装置不再从电源设备强制获取用于提供给待充电设备的最大功率，而是把充电功率的控制权交给电源设备，即按照电源设备所能够提供的充电功率向待充电设备进行充电，此时，无线充电装置的DC/DC转换器用于功率传递。
可选地，在本申请中，无线充电装置在根据包括有输入电流、输入电压、输出电流以及输出电压等至少一个参数的充电参数，确定目标工作模式时，如果历史输出电流大于输出电流，且历史输入电流大于输入电流，那么可以将目标工作模式确定为CP模式。
在本申请的一些实施例中，无线充电装置可以将输出电流与历史输出电流进行比较，同时将历史输入电流与输入电流进行比较，从而根据比较结果确定出与充电参数对应的转换器的目标工作模式。
需要说明的是，在本申请中，如果历史输入电流大于输入电流、历史输出电流大于输出电流，可以认为待充电设备需要的充电功率逐渐降低，电源设备能够向无线充电装置提供足够大的功率，满足无线充电装置向待充电设备进行无线充电的需求，那么电源设备工作在CV输出模式，无线充电装置的DC/DC转换器工作在CP抽载模式。
示例性的，在本申请中，随着充电时间的增加，无线充电装置进入快充退出期，如果转换器对应的历史输出电流为5A，输出电流为1A，即输出电流小于历史输出电流，历史输入电流为8A，输出电流为4A，即输入电流小于历史输入电流，可以认为无线充电装置提供给待充电设备的充电功率在逐渐下降，因此无线充电装置输出的充电电流在不断降低，相应地，无线充电装置的抽载功率也在逐渐下降，那么电源设备的输出模式为CV模式，相应地，无线充电装置可以确定转换器的目标工作模式为CP模式。
也就是说，在本申请中，对于快充退出期，随着待充电设备电量的逐渐提升，电源设备提供的功率可以满足无线充电装置向待充电设备进行无线充电的需求，那么电源设备工作在CV输出模式，无线充电装置的DC/DC转换器工作在CP抽载模式。
步骤103、控制转换器切换至目标工作模式，并根据目标工作模式向待充电设备充电。
在本申请的实施例中，无线充电装置在根据包括有输入电流、输入电压、输出电流以及输出电压等至少一个参数的充电参数，确定目标工作模式之后，便可 以控制转换器切换至目标工作模式，然后根据目标工作模式向待充电设备充电。
可选地，在本申请中，如果确定出转换器对应的目标工作模式为CP模式，那么在控制转换器切换至CP模式之后，无线充电装置根据所述目标工作模式向待充电设备充电的过程中，可以先根据所述输入电流和所述输入电压确定实时输入功率；然后将所述实时输入功率确定为目标充电功率，并按照所述目标充电功率向所述待充电设备充电。
可选地，在本申请中，如果确定出转换器对应的目标工作模式为CV模式，那么在控制转换器切换至CV模式之后，无线充电装置根据所述目标工作模式向待充电设备充电的过程中，可以先将所述实时输入功率确定为目标充电功率，同时将所述输入电压确定为目标充电电压；然后可以按照所述目标充电功率和所述目标充电电压向所述待充电设备充电。
综上所述，通过上述步骤101至步骤104所提出的无线充电方法，可以通过对无线充电装置中的转换器(如DC/DC转换器)的工作模式的控制，一方面降低对电源设备的额定功率的需求，即不再要求电源设备的额定功率大于无线充电过程中的峰值功率，例如，当DC/DC转换器工作在CV抽载模式下时，允许电源设备主动降低功率，从而解决了电源设备无法提供足够功率时出现的充电断续甚至无法充电的问题；另一方面允许电源设备短时间内工作在峰值功率下，以通过无线充电装置给待充电设备供电，例如，当DC/DC转换器工作在CP抽载模式下时，电源设备的输出功率可以提升至额定功率，从而可以充分发挥电源设备的充电能力。
也就是说，针对目前市场的很多适配器能够短时间工作在峰值功率下，而额定功率小于峰值功率的现状，考虑到以手机等终端为代表的待充电设备在大功率充电状态下的时间也很短，一旦电量上来，充电功率就会大幅下降的情况，本申请实施例提出的无线充电方法，可以将DC/DC转换器的充电参数与不同工作模式进行匹配设置，通过DC/DC转换器的工作模式的控制，能够充分发挥适配器的能力，使得适配器尽最大能力满足无线充电装置向待充电设备进行充电的需求；同时，在保证满足待充电设备的充电功率的前提下，也不再要求适配器的额定功率一定要大于待充电设备的峰值充电功率，即对于额定功率不够大的适配器，也能够正常充电。
进一步地，在本申请的实施例中，转换器的目标工作模式还可以为CR模式。也就是说，无线充电装置还可以通过对转换器的抽载方式的调整，使其工作在CR模式上，从而使转换器对于前级供电单元来讲相当于一颗“可控电阻”，进而可以保证转换器的充电电压、充电电流尽可能同相，配合DCX等应用的前级电路，可以获得较高的功率因数(PF)值。
可以理解的是，在本申请的实施例中，DC/DC转换器可以为多种形式的存在，包括但是不限于如Buck电路、Boost电路、Buck-Boost电路、Flybuck等，其中，DC/DC转换器主要完成前级供电电源与后级受电单元之间的连接与转换功能。
本申请实施例提供了一种无线充电方法，无线充电装置在进行无线充电时，检测转换器的充电参数；其中，充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；根据充电参数，确定目标工作模式；其中，目标工作模式用于确定所述转换器的抽载方式；控制转换器切换至目标工作模式，并根据目标工作模式向待充电设备充电。也就是说，在本申请的实施例中，可以根据无线充电装置给待充电设备提供充电的电压和电流；适配器向无线充电装置提 供的电压和电流，在充电过程中控制无线充电装置的DC/DC转换器工作在CV，CP等不同的抽载模式，保证稳定的充电过程。当DC/DC转换器工作在CP抽载模式时，充电功率由DC/DC控制，此时适配器能够提供足够的功率满足无线充电装置给终端设备充电的需求；当DC/DC工作在CV抽载模式时，充电功率由适配器控制，此时不再强制要求适配器提供最大充电功率，进而不会产生断充的问题。
基于上述实施例，在本申请的再一实施例中，图5为本申请实施例中无线充电的实现示意图一，图6为本申请实施例中无线充电的实现示意图二，如图5和图6所示，本申请实施例中的无线充电系统20包括：电源设备210、无线充电装置220和待充电设备230。
示例性的，在本申请的实施例中，电源设备210，被配置为向无线充电装置220提供电能。该电源设备210可包括：整流电路、变压电路、控制电路和充电接口等，可实现将交流电输入转换为直流电输出，以提供给无线充电装置220。例如，电源提供设备可为适配器、充电宝或车载电源等。
进一步地，在本申请的实施例中，电源设备210还可直接将交流电提供给无线充电装置220。例如，电源设备210可为交流电源。当电源设备210为交流电源时，无线充电装置220还包括用于将交流电转换为直流电的电路或模块，例如，整流滤波电路和DC/DC转换器等。
无线充电装置220，被配置为将电源设备210提供的直流电或交流电，转换成电磁信号，以通过无线的方式进行电力传输。
进一步地，如上述图4所示，在本申请的实施例中，无线充电装置220可以包括DC/DC转换器221、无线充电发射单元222和检测模块223。本领域技术人员可以理解，图2中所示出的无线充电装置220的组成结构并不构成对无线充电设备的限定，无线充电设备可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
需要说明的是，电源设备210可以为普通适配器，也可以为调压适配器(即，适配器自身能够调整输出电压的大小)，甚至还可以为移动电源等。这里，DC/DC转换器221用于进行直流/直流(DC/DC)的电压变换，将电源设备210的输出电压调节到一个固定电压值并提供给无线充电发射单元222。
示例性的，在本申请中，DC/DC转换器221可以为升压式(Boost)变换电路、降压式(Buck)变换电路、升降压式(Buck-Boost)变换电路或者Flybuck转换器等，本申请实施例不作具体限定。
无线充电发射单元222，被配置为将DC/DC转换器221提供的直流电或电源设备210提供的直流电转换为可耦合到发射线圈的交流电，并通过发射线圈将该交流电转换成电磁信号进行发射。
在本申请的实施例中，无线充电发射单元222可包括：逆变单元和谐振单元。逆变单元可包括多个开关管，通过控制开关管的导通时间(即，占空比)可调节发射功率的大小。谐振单元，用于将电能传输出去，例如，谐振单元可包括电容和发射线圈。通过调整谐振单元的工作频率，可以调节无线充电发射单元222发射功率的大小。
在本申请的实施例中，无线充电装置220可为无线充电底座或具有储能功能的设备等。当无线充电装置220为具有储能功能的设备时，其还包括储能模块(例如，锂电池233)，可从外部的电源设备210获取电能并进行存储。由此，储能模块可将电能提供给无线充电发射单元222。本领域技术人员可以理解，无线充 电装置220可通过有线或无线的方式从外部的电源设备210获取电能。其中，有线的方式，例如，通过充电接口(例如，Type-C接口或者USB接口等)与电源设备210连接，获取电能。无线的方式，例如，无线充电装置220还可以包括无线充电接收单元231，其可通过无线的方式从具有无线充电功能的设备获取电能。
检测模块223，可以用于对无线充电过程进行控制。在本申请的一些实施例中，检测模块223可以对DC/DC转换器221的输入电流、输入电压、输出电流以及输出电压等充电参数中的至少一个参数进行实时检测，从而实现对DC/DC转换器221的充电参数的实时监测。其中，检测模块223的实时监测功能可以是通过DC/DC转换器221内部控制电路的实现，也可以是通过外部控制器的实现。
示例性的，在本申请中，如图5所示，检测模块223可以为配置在DC/DC转换器221内部的控制电路，该控制电路可以同时对DC/DC转换器221的充电参数进行检测。
示例性的，在本申请中，如图6所示，检测模块223可以为配置在无线充电装置220内部的控制器，该控制器通过对充电参数的监测(如输入电压、电流等信息)，然后控制DC/DC转换器221实现CC、CV、CP、CR的功能。
本领域技术人员可以理解，无线充电装置220还可包括其它相关硬件、逻辑器件、单元和/或编码，以实现相应的功能。例如，无线充电装置220还可包括显示单元(例如，可为发光二极管或LED显示屏)，用于在无线充电过程中，实时显示充电状态(例如，充电进行中或终止等)。本申请实施例不作具体限定。
在本申请的实施例中，如上述图2所示，待充电设备230包括无线充电接收单元231、充电管理模块232、电池233。本领域技术人员可以理解，图4和图5中所示出的待充电设备230的组成结构并不构成对待充电设备的限定，待充电设备可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
需要说明的是，电源设备210为无线充电装置220提供供电电源，待充电设备230放置于无线充电装置220的表面，无线充电装置220通过电磁感应方式为待充电设备230内的电池233充电。这里，无线充电装置220和待充电设备230之间建立有无线连接，两者还可以相互通信。
在本申请的实施例中，无线通信的方式包括但不限于蓝牙通信、无线保真(Wireless Fidelity，Wi-Fi)通信、基于高载波频率的近距离无线通信、光通信、超声波通信、超宽带通信和移动通信等。本申请实施例不作具体限定。
无线充电接收单元231，被配置为通过接收线圈将无线充电装置220的无线充电发射单元222发射的电磁信号转换成交流电，并对该交流电进行整流和/或滤波等操作，将该交流电转换成稳定的直流电，以提供给电池233充电。
在本申请的实施例中，无线充电接收单元231包括：接收线圈和AC/DC变换单元。AC/DC变换单元，用于将接收线圈接收到的交流电转换为直流电。
在本申请的实施例中，电池233可包括单电芯或多电芯。电池233包括多电芯时，该多个电芯之间为串联关系。由此，电池233可承受的充电电压为多个电芯可承受的充电电压之和，可提高充电速度，减少充电发热。
在本申请的实施例中，充电管理模块232，被配置为对无线充电接收单元231输出的直流电进行升压或者降压处理。
图7为常见的无线充电装置的工作模式示意图，如图7所示，目前常见的无线充电装置主要控制输出工作在CV模式，对DC/DC转换器的输入抽载模式不进行控制，即电源设备在CV输出的工作模式下向无线充电装置充电，无线充电装置也在CV输出的工作模式下向待充电设备充电。
需要说明的是，在本申请中，与目前常见的对无线充电装置中的DC/DC转换器不进行控制的方案相比，本申请实施例增加了DC/DC转换器的CV、CC、CP等抽载控制模式。其中，DC/DC转换器的CV抽载模式可以由电源设备在一定可控范围内进行充电功率的控制，从而降低无线充电装置对电源设备的额定功率的依赖，在电源设备额定功率无法满足无线充电峰值功率的情况下，允许电源设备尽其最大能力支持无线充电装置向待充电设备充电。
同时，对于无线充电装置来讲，正是由于对DC/DC转换器的工作模式的控制，因而不再要求配套的电源设备额定功率非常大，只需要峰值功率能够达到最大，无线充电装置即可以短时以最大的能力给待充电设备充电，当待充电设备的电量逐渐增大以后，电源设备也逐渐回到额定率支持无线充电装置向待充电设备充电。
基于上述图5和图6，进一步地，在申请的实施例中，以适配器(电源设备)、无线充电器(无线充电装置)、无线终端(待充电设备)为例，图8为无线充电的示意图一，图9为无线充电的示意图二，图10为无线充电的示意图三。
如图8所示，通过对DC/DC转换器的充电参数(输入电流、输入电压、输出电流、输出电压中的至少一个参数)的检测，可以确定DC/DC转换器实时输出的功率较小，即无线充电器向无线终端充电的实时充电功率较小，适配器能够满足无线充电器的充电需求，此时，适配器的输出模式为CV模式，可以进一步确定DC/DC转换器的目标工作模式为CP模式。
可以理解的是，在本申请中，在充电初期，无线充电器给无线终端提供的充电功率较小，为小功率恒功率充电时期，此时，适配器能够提供的功率完全可以满足无线充电器的需求，因此，无线充电器的DC/DC转换器工作在CP抽载模式，适配器工作在CV输出模式。
如图9所示，通过对DC/DC转换器的充电参数(输入电流、输入电压、输出电流、输出电压中的至少一个参数)的检测，可以确定DC/DC转换器实时输出的功率已经达到无线终端对应的功率峰值，即确定无线充电器的实时充电功率提升到功率上限值，如果适配器所提供的功率能够满足此时无线充电器的充电需求，即在短时间内也可以提供满足功率上限值的充电功率，此时，适配器的输出模式为CV模式，相应地，无线充电器可以确定DC/DC转换器的目标工作模式为CP模式或CC模式。
可以理解的是，在本申请中，在进入快充期之后，无线充电器给无线终端充电的充电功率提升到峰值功率，为大功率限流充电时期，此时适配器进入到短期最大功率模式，提供的功率能够满足无线充电器的最大功率需求，无线充电器的DC/DC转换器工作在CP抽载模式或CC抽载模式，适配器工作在CV输出模式。
如图10所示，通过对DC/DC转换器的充电参数(输入电流、输入电压、输出电流、输出电压中的至少一个参数)的检测，可以确定DC/DC转换器实时输出的功率在不断地提升，即确定无线充电器的实时充电功率需要逐步提升至功率上限值，如果适配器所提供的功率不满足此时无线充电器的充电需求，例如，DC/DC转换器实时输出的功率还未达到无线终端对应的功率峰值之前，DC/DC转换器的输入电压就开始减小，即无法在短时间内提供满足功率上限值的充电功率，此时，适配器的输出模式切换至CC模式，相应地，无线充电器可以确定DC/DC转换器的目标工作模式为CV模式。
可以理解的是，在本申请中，在进入快充期之后，无线充电器给无线终端充电的充电功率会逐步提升到峰值功率，而如果适配器向无线充电装置提供的功率 不能够满足无线充电器的最大功率需求，适配器的充电电流会不断增大至最大电流值，此时适配器便会切换至CC输出模式，相应地，无线充电器的DC/DC转换器切换工作在CV抽载模式，仅仅用于进行功率的传递，不再强制从适配器获取最大功率，而是把充电功率的控制权交给适配器，此时为可变功率充电时期。
如图10所示，通过对DC/DC转换器的充电参数(输入电流、输入电压、输出电流、输出电压中的至少一个参数)的检测，可以确定DC/DC转换器实时输出的功率已经达到无线终端对应的功率峰值，即无线充电器的实时充电功率提升到功率上限值，如果适配器所提供的功率能够满足无线充电器的充电需求，并在提供满足功率上限值的充电功率一段时间之后，适配器不能继续提供最大功率，需要进入降功率期，即需要降低功率保证自身的稳定工作，例如，DC/DC转换器实时输出的功率在达到无线终端对应的功率峰值一段时间之后，DC/DC转换器的输入电压开始减小，因此会将输出模式从CV模式切换至CC模式，相应地，无线充电器可以确定DC/DC转换器的目标工作模式为CV模式。
可以理解的是，在本申请中，在进入快充期之后，无线充电器给无线终端充电的充电功率会逐步提升到峰值功率，如果适配器向无线充电装置提供的功率能够满足无线充电器的最大功率需求，并以最大功率向无线充电器充电一段时间之后，适配器会进入降功率期，会切换至CC输出模式，相应地，无线充电器的DC/DC转换器切换工作在CV抽载模式，仅仅用于进行功率的传递，不再强制从适配器获取最大功率，而是把充电功率的控制权交给适配器，此时为可变功率充电时期。
也就是说，在本申请中，快充工作一段时间后，适配器此时无法继续提供最大功率，需要降低功率保证自己的稳定工作，因此适配器会进入降功率期，此时，适配器降低输出电流，进入CC输出模式；而无线充电器的DC/DC转换器的目标工作模式切换到CV抽载模式，充电功率由适配器的输出功率决定。具体地，在DC/DC转换器工作在CV抽载模式的过程中，充电功率的控制由适配器执行，无线充电器的DC/DC转换器仅仅用于功率传递，不再强制获取最大功率。相比之下，工作在CV抽载模式下的DC/DC转换器，可以避免传统的DC/DC抽载模式由于无法满足适配器的降功率需求所触发的充电系统的工作异常(欠压保护或过流保护等)的情况，解决了充电断续甚至无法充电的问题。
如图8所示，通过对DC/DC转换器的充电参数(输入电流、输入电压、输出电流、输出电压中的至少一个参数)的检测，可以确定DC/DC转换器实的时输出电流在降低，同时，DC/DC转换器实的时输入电流在降低，即无线终端需要的充电功率逐渐降低，适配器能够满足无线充电器向无线终端进行无线充电的需求，此时，适配器的输出模式为CV模式，相应地，无线充电器可以确定DC/DC转换器的目标工作模式为CP模式。
可以理解的是，在本申请中，随着充电时间的增加，无线终端电量的逐渐提升，无线终端需要的充电功率逐渐下降，为小功率充电时期，无线充电器进入快充退出期，因此无线充电器提供给无线终端的充电功率也会逐渐下降，相应地，无线充电器的抽载功率也会逐渐下降，那么电源设备的输出模式为CV模式，相应地，无线充电器可以确定转换器的目标工作模式为CP模式。
进一步地，在本申请的实施例中，本申请提出的无线充电方法并不仅仅局限在无线充电装置上使用，也可以在其他设备，如移动电源上应用。
基于上述图5和图6，进一步地，在申请的实施例中，以适配器、移动电源、手机为例，图11为充电过程中的工作模式控制示意图一，图12为充电过程中的 工作模式控制示意图二。
如图11所示，通过对移动电源的充电参数(输入电流、输入电压、输出电流、输出电压中的至少一个参数)的检测，在确定适配器能够满足移动电源的充电需求时，适配器的输出模式为CV模式，进一步确定移动电源的目标工作模式为CC模式；在确定适配器无法满足移动电源的充电需求时，适配器的输出模式为CC模式，进一步确定移动电源的目标工作模式为CV模式。
如图12所示，通过对移动电源的充电参数(输入电流、输入电压、输出电流、输出电压中的至少一个参数)的检测，在确定适配器能够满足移动电源的充电需求时，适配器的输出模式为CV模式，也可以确定移动电源的目标工作模式为CP模式；在确定适配器无法满足移动电源的充电需求时，适配器的输出模式为CC模式，进一步确定移动电源的目标工作模式为CV模式。
需要说明的是，在本申请的实施例中，对于移动电源来说，在向手机进行充电时，如果适配器向无线充电装置提供的功率不足，那么允许适配器自动控制功率，即允许适配器从CV输出模式切换至CC输出模式，相应地，此时移动电源不再从适配器强制获取最大功率。
可见，本申请实施例提出的抽载模式的调整方法，对电源设备(适配器)和待充电设备(手机)之间的变换单元都是有效的，实现了当电源设备的额定功率不足时，允许其“有多大能力出多大力”，从而可以降低对电源设备的额定充电功率的依赖。
本申请实施例提供了一种无线充电方法，无线充电装置在进行无线充电时，检测转换器的充电参数；其中，充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；根据充电参数，确定目标工作模式；其中，目标工作模式用于确定所述转换器的抽载方式；控制转换器切换至目标工作模式，并根据目标工作模式向待充电设备充电。也就是说，在本申请的实施例中，可以根据无线充电装置给待充电设备提供充电的电压和电流；适配器向无线充电装置提供的电压和电流，在充电过程中控制无线充电装置的DC/DC转换器工作在CV，CP等不同的抽载模式，保证稳定的充电过程。当DC/DC转换器工作在CP抽载模式时，充电功率由DC/DC控制，此时适配器能够提供足够的功率满足无线充电装置给终端设备充电的需求；当DC/DC工作在CV抽载模式时，充电功率由适配器控制，此时不再强制要求适配器提供最大充电功率，进而不会产生断充的问题。
基于上述实施例，在本申请的另一实施例中，图13为本申请实施例提出的无线充电装置的组成结构示意图一，如图13示，本申请实施例提出的无线充电装置30可以包括处理器31、存储有所述处理器31可执行指令的存储器32、检测模块33，
所述检测模块33，被配置为在进行无线充电时，检测转换器的充电参数；其中，所述充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；
所述处理器31，被配置为根据所述充电参数，确定目标工作模式；其中，所述目标工作模式用于确定所述转换器的抽载方式；控制所述转换器切换至所述目标工作模式，以基于所述目标工作模式向待充电设备充电。
进一步地，所述处理器31，还被配置为根据所述输出电流和所述输出电压确定实时充电功率；以及若所述实时充电功率小于预设功率阈值，则将所述目标工作模式确定为固定功率CP模式。
进一步地，所述处理器31，还被配置为根据所述输入电流和所述输入电压确定实时输入功率；同时根据所述输出电流和所述输出电压确定实时充电功率；以及若所述实时充电功率等于所述实时输入功率，且所述实时充电功率等于功率上限值，则将所述目标工作模式确定为CP模式。
进一步地，所述处理器31，还被配置为在根据所述充电参数，确定目标工作模式之前，确定所述转换器的历史输入电流、历史输入电压、历史输出电流以及历史输出电压。
进一步地，所述处理器31，还被配置为根据所述输入电流和所述输入电压确定实时输入功率；同时根据所述输出电流和所述输出电压确定实时充电功率；以及若所述实时充电功率大于或者等于所述实时输入功率，且所述历史输入电压大于所述输入电压，则将所述目标工作模式确定为恒压CV模式。
进一步地，所述处理器31，还被配置为若所述输出电流小于所述历史输出电流，且所述输入电流小于所述历史输入电流，则将所述目标工作模式确定为CP模式。
进一步地，所述处理器31，还被配置为根据所述输入电流和所述输入电压确定实时输入功率；以及将所述实时输入功率确定为目标充电功率，并按照所述目标充电功率向所述待充电设备充电。
进一步地，所述处理器31，还被配置为将所述实时输入功率确定为目标充电功率，将所述输入电压确定为目标充电电压；以及按照所述目标充电功率和所述目标充电电压向所述待充电设备充电。
进一步地，所述检测模块33，还被配置为通过所述转换器设置的控制电路检测所述充电参数；或者，通过控制器检测所述充电参数。
在本申请的实施例中，上述处理器31可以为特定用途集成电路(Application Specific Integrated Circuit，ASIC)、数字信号处理器(Digital Signal Processor，DSP)、数字信号处理装置(Digital Signal Processing Device，DSPD)、可编程逻辑装置(ProgRAMmable Logic Device，PLD)、现场可编程门阵列(Field ProgRAMmable Gate Array，FPGA)、中央处理器(Central Processing Unit，CPU)、控制器、微控制器、微处理器中的至少一种。可以理解地，对于不同的设备，用于实现上述处理器功能的电子器件还可以为其它，本申请实施例不作具体限定。无线充电装置30还可以包括存储器32，该存储器32可以与处理器31连接，其中，存储器32用于存储可执行程序代码，该程序代码包括计算机操作指令，存储器32可能包含高速RAM存储器，也可能还包括非易失性存储器，例如，至少两个磁盘存储器。
在本申请的实施例中，无线充电装置30还可以包括通信接口34和总线35，其中，总线35用于连接通信接口34、处理器31以及存储器32以及这些器件之间的相互通信。
在本申请的实施例中，存储器32，被配置为存储指令和数据。
在实际应用中，上述存储器32可以是易失性存储器(volatile memory)，例如随机存取存储器(Random-Access Memory，RAM)；或者非易失性存储器(non-volatile memory)，例如只读存储器(Read-Only Memory，ROM)，快闪存储器(flash memory)，硬盘(Hard Disk Drive，HDD)或固态硬盘(Solid-State Drive，SSD)；或者上述种类的存储器的组合，并向处理器31提供指令和数据。
另外，在本实施例中的各功能模块可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成 的单元既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
集成的单元如果以软件功能模块的形式实现并非作为独立的产品进行销售或使用时，可以存储在一个计算机可读取存储介质中，基于这样的理解，本实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或processor(处理器)执行本实施例方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
进一步地，在本申请的实施例中，图14为本申请实施例提出的无线充电装置的组成结构示意图二，如图14示，本申请实施例提出的无线充电装置30还可以包括无线充电发射单元36，转换器37，逆变单元38，其中，由无线充电发射单元36，转换器37，逆变单元38构成的无线充电装置30可以用于实现上述实施例提出的无线充电方法。
可以理解的是，在本申请的实施例中，无线充电发射单元36，可以为上述图1中的无线充电发射单元121或上述图4中的无线充电发射单元222，用于将电源设备的输出电压和输出电流转换成无线充电信号(电磁信号)进行发射。
可以理解的是，在本申请的实施例中，转换器37，可以为上述图2中的DC/DC转换器122或上述图4中的DC/DC转换器221，用于对接收自电源设备的固定电压进行缩放处理。
可以理解的是，在本申请的实施例中，逆变单元38，可以为上述图2中的逆变器123，用来将直流电压(Vsdc)转换为交流电压(Vsac)。
本申请实施例提供了一种无线充电装置，该无线充电装置在进行无线充电时，检测转换器的充电参数；其中，充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；根据充电参数，确定目标工作模式；其中，目标工作模式用于确定所述转换器的抽载方式；控制转换器切换至目标工作模式，并根据目标工作模式向待充电设备充电。也就是说，在本申请的实施例中，可以根据无线充电装置给待充电设备提供充电的电压、电流；适配器向无线充电装置提供的电压和电流，在充电过程中控制无线充电装置的DC/DC转换器工作在CV、CP等不同的抽载模式，保证稳定的充电过程。当DC/DC转换器工作在CP抽载模式时，充电功率由DC/DC控制，此时适配器能够提供足够的功率满足无线充电装置给终端设备充电的需求；当DC/DC工作在CV抽载模式时，充电功率由适配器控制，此时不再强制要求适配器提供最大充电功率，进而不会产生断充的问题。
本申请实施例提供一种计算机可读存储介质，其上存储有程序，该程序被处理器执行时实现如上所述的无线充电方法。
具体来讲，本实施例中的一种无线充电方法对应的程序指令可以被存储在光盘，硬盘，U盘等存储介质上，当存储介质中的与一种无线充电方法对应的程序指令被一电子设备读取或被执行时，包括如下步骤：
在进行无线充电时，检测转换器的充电参数；其中，所述充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；
根据所述充电参数，确定目标工作模式；其中，所述目标工作模式用于确定所述转换器的抽载方式；
控制所述转换器切换至所述目标工作模式，以基于所述目标工作模式向待充电设备充电。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的实现流程示意图和/或方框图来描述的。应理解可由计算机程序指令实现流程示意图和/或方框图中的每一流程和/或方框、以及实现流程示意图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在实现流程示意图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在实现流程示意图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在实现流程示意图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本申请的较佳实施例而已，并非用于限定本申请的保护范围。
工业实用性
在本申请的实施例中，可以根据无线充电装置给待充电设备提供充电的电压和电流；适配器向无线充电装置提供的电压和电流，在充电过程中控制无线充电装置的DC/DC转换器工作在CV、CP等不同的抽载模式，保证稳定的充电过程。当DC/DC工作在CP抽载模式时，充电功率由DC/DC控制，此时适配器能够提供足够的功率满足无线充电装置给终端设备充电的需求；当DC/DC转换器工作在CV抽载模式时，充电功率由适配器控制，此时不再强制要求适配器提供最大充电功率，进而不会产生断充的问题；提高无线充电的智能性和稳定性。

Claims (20)

  1. 一种无线充电方法，所述方法包括：
    在进行无线充电时，检测转换器的充电参数；其中，所述充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；
    根据所述充电参数，确定目标工作模式；其中，所述目标工作模式用于确定所述转换器的抽载方式；
    控制所述转换器切换至所述目标工作模式，以基于所述目标工作模式向待充电设备充电。
  2. 根据权利要求1所述的方法，其中，所述根据所述充电参数，确定目标工作模式，包括：
    根据所述输出电流和所述输出电压确定实时充电功率；
    若所述实时充电功率小于预设功率阈值，则将所述目标工作模式确定为固定功率CP模式。
  3. 根据权利要求1所述的方法，其中，所述根据所述充电参数，确定目标工作模式，包括：
    根据所述输入电流和所述输入电压确定实时输入功率；同时根据所述输出电流和所述输出电压确定实时充电功率；
    若所述实时充电功率等于所述实时输入功率，且所述实时充电功率等于功率上限值，则将所述目标工作模式确定为CP模式。
  4. 根据权利要求1所述的方法，其中，所述根据所述充电参数，确定目标工作模式之前，所述方法还包括：
    确定所述转换器的历史输入电流、历史输入电压、历史输出电流以及历史输出电压。
  5. 根据权利要求4所述的方法，其中，所述根据所述充电参数，确定目标工作模式，包括：
    根据所述输入电流和所述输入电压确定实时输入功率；同时根据所述输出电流和所述输出电压确定实时充电功率；
    若所述实时充电功率大于或者等于所述实时输入功率，且所述历史输入电压大于所述输入电压，则将所述目标工作模式确定为恒压CV模式。
  6. 根据权利要求4所述的方法，其中，所述根据所述充电参数，确定目标工作模式，包括：
    若所述输出电流小于所述历史输出电流，且所述输入电流小于所述历史输入电流，则将所述目标工作模式确定为CP模式。
  7. 根据权利要求2或3或6所述的方法，其中，所述基于所述目标工作模式向待充电设备充电，包括：
    根据所述输入电流和所述输入电压确定实时输入功率；
    将所述实时输入功率确定为目标充电功率，并按照所述目标充电功率向所述待充电设备充电。
  8. 根据权利要求5所述的方法，其中，所述基于所述目标工作模式向待充电设备充电，包括：
    将所述实时输入功率确定为目标充电功率，将所述输入电压确定为目标充电电压；
    按照所述目标充电功率和所述目标充电电压向所述待充电设备充电。
  9. 根据权利要求1所述的方法，其中，所述方法还包括：
    通过所述转换器设置的控制电路检测所述充电参数；或者，
    通过控制器检测所述充电参数。
  10. 一种无线充电装置，所述无线充电装置包括：处理器、存储有所述处理器可执行指令的存储器、检测模块，
    所述检测模块，被配置为在进行无线充电时，检测转换器的充电参数；其中，所述充电参数包括输入电流、输入电压、输出电流以及输出电压中的至少一个参数；
    所述处理器，被配置为根据所述充电参数，确定目标工作模式；其中，所述目标工作模式用于确定所述转换器的抽载方式；控制所述转换器切换至所述目标工作模式，以基于所述目标工作模式向待充电设备充电。
  11. 根据权利要求10所述的无线充电装置，其中，所述处理器，还被配置为根据所述输出电流和所述输出电压确定实时充电功率；以及若所述实时充电功率小于预设功率阈值，则将所述目标工作模式确定为固定功率CP模式。
  12. 根据权利要求10所述的无线充电装置，其中，所述处理器，还被配置为根据所述输入电流和所述输入电压确定实时输入功率；同时根据所述输出电流和所述输出电压确定实时充电功率；以及若所述实时充电功率等于所述实时输入功率，且所述实时充电功率等于功率上限值，则将所述目标工作模式确定为CP模式。
  13. 根据权利要求10所述的无线充电装置，其中，所述处理器，还被配置为在根据所述充电参数，确定目标工作模式之前，确定所述转换器的历史输入电流、历史输入电压、历史输出电流以及历史输出电压。
  14. 根据权利要求13所述的无线充电装置，其中，所述处理器，还被配置为根据所述输入电流和所述输入电压确定实时输入功率；同时根据所述输出电流和所述输出电压确定实时充电功率；以及若所述实时充电功率大于或者等于所述实时输入功率，且所述历史输入电压大于所述输入电压，则将所述目标工作模式确定为恒压CV模式。
  15. 根据权利要求13所述的无线充电装置，其中，所述处理器，还被配置为若所述输出电流小于所述历史输出电流，且所述输入电流小于所述历史输入电流，则将所述目标工作模式确定为CP模式。
  16. 根据权利要求11或12或15所述的无线充电装置，其中，所述处理器，还被配置为根据所述输入电流和所述输入电压确定实时输入功率；以及将所述实时输入功率确定为目标充电功率，并按照所述目标充电功率向所述待充电设备充电。
  17. 根据权利要求14所述的无线充电装置，其中，所述处理器，还被配置为将所述实时输入功率确定为目标充电功率，将所述输入电压确定为目标充电电压；以及按照所述目标充电功率和所述目标充电电压向所述待充电设备充电。
  18. 根据权利要求10所述的无线充电装置，其中，所述检测模块，还被配置为通过所述转换器设置的控制电路检测所述充电参数；或者，通过控制器检测所述充电参数。
  19. 一种无线充电装置，所述无线充电装置包括：无线充电发射单元，转换器，逆变单元；所述无线充电装置用于实现如权利要求1-9任一项所述的方法。
  20. 一种计算机可读存储介质，其上存储有程序，应用于无线充电装置中， 所述程序被处理器执行时，实现如权利要求1-9任一项所述的方法。
PCT/CN2022/085374 2021-05-18 2022-04-06 无线充电方法、装置及存储介质 WO2022242347A1 (zh)

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