WO2021017770A1 - Procédé de charge sans fil et dispositif à charger - Google Patents

Procédé de charge sans fil et dispositif à charger Download PDF

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Publication number
WO2021017770A1
WO2021017770A1 PCT/CN2020/100568 CN2020100568W WO2021017770A1 WO 2021017770 A1 WO2021017770 A1 WO 2021017770A1 CN 2020100568 W CN2020100568 W CN 2020100568W WO 2021017770 A1 WO2021017770 A1 WO 2021017770A1
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WO
WIPO (PCT)
Prior art keywords
charging
circuit
wireless
current
output
Prior art date
Application number
PCT/CN2020/100568
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English (en)
Chinese (zh)
Inventor
林尚波
万世铭
杨军
Original Assignee
Oppo广东移动通信有限公司
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Publication date
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 WO2021017770A1 publication Critical patent/WO2021017770A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • 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
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the embodiments of the present application relate to the field of charging technology, and in particular to a wireless charging method and a device to be charged.
  • the present application provides a wireless charging method and a device to be charged, which can reduce the heat generated by the electronic device during the wireless charging process.
  • a wireless charging method in a first aspect, includes a wireless receiving circuit, a charging management circuit, a communication control circuit, a detection circuit, and a battery.
  • the output of the wireless receiving circuit and the input of the charging management circuit The input terminal of the charging management circuit is connected to the battery, the communication control circuit controls the output current and/or output voltage of the wireless receiving circuit and the charging management circuit, and the method includes: In the process of adjusting the wireless charging state of the battery from the first charging mode to the second charging mode, the communication control circuit instructs the wireless transmitting device to increase the transmission power so as to increase the voltage output by the wireless receiving circuit; when the wireless When the voltage output by the receiving circuit reaches the first voltage threshold, the communication control circuit instructs the wireless transmitting device to increase the transmission power to increase the current output by the charging management circuit; the detection circuit detects the wireless receiving circuit Output current; when the output current of the wireless receiving circuit is greater than the first current threshold, the communication control circuit boosts the output voltage of the wireless receiving circuit so that the output current of the
  • a device to be charged including: a communication control circuit for instructing the wireless transmitting device to increase the transmitting power during the process of adjusting the wireless charging state of the battery from the first charging mode to the second charging mode The voltage output by the wireless receiving circuit is increased; the communication control circuit is also used for: when the voltage output by the wireless receiving circuit reaches a first voltage threshold, instruct the wireless transmitting device to increase the transmission power so that the charging management circuit The output current is increased; the device to be charged further includes: a detection circuit for detecting the output current of the wireless receiving circuit; the communication control circuit is also used for: when the output current of the wireless receiving circuit is greater than the first current When the threshold is set, the output voltage of the wireless receiving circuit is increased so that the output current of the wireless receiving circuit is less than or equal to the first current threshold.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method described in the first aspect or any one of its implementation manners.
  • the present application provides a computer program product, which is characterized by including computer program instructions that enable a computer to execute the method described in the first aspect or any one of its implementation manners.
  • FIG. 1 is a schematic diagram of a wireless charging system provided by an embodiment of the present application
  • Figure 2 is a schematic diagram of a device to be charged provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a wireless charging method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a wireless charging method provided by another embodiment of the present application.
  • FIG. 5 is a schematic diagram of a wireless charging method provided by another embodiment of the present application.
  • FIG. 6 is a schematic diagram of a device to be charged according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a wireless charging system provided by another embodiment of the present application.
  • FIG. 8 is a schematic diagram of a wireless charging system provided by another embodiment of the present application.
  • FIG. 9 is a schematic diagram of a wireless charging system provided by another embodiment of the present application.
  • Fig. 10 is a schematic diagram of a wireless charging system provided by another embodiment of the present application.
  • a wireless charging method 300 of the embodiment of the present application is applied to a device to be charged 600.
  • the device to be charged 600 includes a wireless receiving circuit 610, a charging management circuit 620, a communication control circuit 640, and a detection circuit. 650 and battery 630, the output terminal of the wireless receiving circuit 610 is connected to the input terminal of the charging management circuit 620, the input terminal of the charging management circuit 620 is connected to the battery 630, the communication control circuit 640 controls the output of the wireless receiving circuit 610 and the charging management circuit 620 Current and/or output voltage, method 300 includes:
  • the communication control circuit 640 instructs the wireless transmitting device to increase the transmission power, so as to increase the voltage output by the wireless receiving circuit 610;
  • the communication control circuit 640 instructs the wireless transmitting device to increase the transmission power, so as to increase the current output by the charging management circuit 620;
  • the detection circuit 650 detects the output current of the wireless receiving circuit 610.
  • the communication control circuit 640 increases the output voltage of the wireless receiving circuit 610 so that the output current of the wireless receiving circuit 610 is less than or equal to the first current threshold.
  • the method further includes:
  • the communication control circuit 640 increases the output current of the charging management circuit 620 until the output current of the charging management circuit 620 reaches the second current threshold.
  • the wireless charging when the output current of the charging management circuit 620 reaches the second current threshold, the wireless charging enters the second charging mode; or when the output current of the charging management circuit 620 does not reach the second current threshold And when the output voltage of the wireless receiving circuit 610 reaches the second voltage threshold, the wireless charging enters the second charging mode.
  • the communication control circuit 640 instructs the wireless transmitting device to increase the transmission power, including: the power difference between the expected received power and the actual received power of the wireless receiving circuit 610 is greater than or When it is equal to the first threshold, the communication control circuit 640 sends first indication information to the wireless transmitting device so that the power difference is smaller than the first threshold; wherein the first indication information is used to instruct the wireless transmitting device to increase the output voltage.
  • the first threshold is zero.
  • the method before the wireless charging state of the battery 630 is adjusted from the first charging mode to the second charging mode, the method further includes:
  • the communication control circuit 640 sets the current output by the charging management circuit 620 to the third current threshold.
  • the method further includes: the device to be charged 30 obtains first information: temperature information of the battery 33, voltage information of the battery 33, state of charge information of the battery 33, and the wireless transmitting device 20 The type of the connected power supply device 10; when the first information satisfies the conditions for entering the second charging mode, the adjustment is made from the first charging mode to the second charging mode.
  • the method further includes: in the second charging mode, the detection circuit 34 of the device to be charged 30 detects the following information: battery 33 temperature information, battery 33 charging current information , The battery 33 voltage information, the output voltage of the wireless receiving circuit 31, and the power difference between the power expected to be received by the wireless receiving circuit 31 and the power actually received.
  • the communication control circuit adjusts the output current of the charging management circuit 32 or the output voltage of the wireless receiving circuit 31 according to at least one of the information detected by the detection circuit 34.
  • the communication control circuit feeds back the adjusted output current of the charging management circuit 32 or the adjusted output voltage of the wireless receiving circuit 31 to the wireless transmitting device 20.
  • a device to be charged 600 includes: a communication control circuit 610, a charging management circuit 620, a battery 630, a communication control circuit 640, and a detection circuit 650.
  • the communication control circuit 610 is used to instruct the wireless transmitting device to increase the transmission power during the adjustment of the wireless charging state of the battery 630 from the first charging mode to the second charging mode, so that the voltage output by the wireless receiving circuit 610 is increased.
  • the communication control circuit 640 is further configured to: when the voltage output by the wireless receiving circuit 610 reaches the first voltage threshold, instruct the wireless transmitting device to increase the transmission power, so as to increase the current output by the charging management circuit 620.
  • the device to be charged 600 further includes a detection circuit 650 for detecting the output current of the wireless receiving circuit 610.
  • the communication control circuit 640 is also used to: when the output current of the wireless receiving circuit 610 is greater than the first current threshold, increase the output voltage of the wireless receiving circuit 610 so that the output current of the wireless receiving circuit 610 is less than or equal to the first current threshold.
  • the communication control circuit 610 is also used to increase the output current of the charging management circuit 620 when the output current of the wireless receiving circuit 610 is less than or equal to the first current threshold.
  • the output current of the charging management circuit 620 reaches the second current threshold.
  • the wireless charging when the output current of the charging management circuit 620 reaches the second current threshold, the wireless charging enters the second charging mode; or when the output current of the charging management circuit 620 does not reach the second current threshold And when the output voltage of the wireless receiving circuit 610 reaches the second voltage threshold, the wireless charging enters the second charging mode.
  • the communication control circuit 640 is specifically used for: when the power difference between the expected received power and the actual received power of the wireless receiving circuit 610 is greater than or equal to the first threshold Next, send the first indication information to the wireless transmitting device so that the power difference is smaller than the first threshold; where the first indication information is used to instruct the wireless transmitting device to increase the output voltage.
  • the first threshold is zero.
  • the communication control circuit 640 is also used to output the charging management circuit 620 before the wireless charging state of the battery 630 is adjusted from the first charging mode to the second charging mode.
  • the current of is set to the third current threshold.
  • the communication control circuit 640 is also used to: obtain first information: temperature information of the battery 630, voltage information of the battery 630, information about the state of charge of the battery 630, and wireless transmitting device connection The type of power supply equipment; when the first information meets the conditions for entering the second charging mode, the adjustment is made from the first charging mode to the second charging mode.
  • the detection circuit 650 is also used to detect the following information during the second charging mode: battery temperature information, battery charging current information, battery voltage information, and wireless receiving circuit 610
  • the output voltage is the power difference between the expected received power and the actual received power of 610 wireless receiving circuits
  • the communication control circuit 640 is also used to: adjust the charging management circuit according to at least one of the information detected by the detection circuit 650
  • the output current of 620 or the output voltage of the wireless receiving circuit 610; the adjusted output current of the charging management circuit 620 or the adjusted output voltage of the wireless receiving circuit 610 is fed back to the wireless transmitting device.
  • a computer-readable storage medium is used for storing computer programs.
  • the computer-readable storage medium is used for a device to be charged 600, and the device to be charged 600 includes a wireless receiving circuit 610 , The charging management circuit 620, the communication control circuit 640, the detection circuit 650 and the battery 630, the output terminal of the wireless receiving circuit 610 is connected with the input terminal of the charging management circuit 620, the input terminal of the charging management circuit 620 is connected with the battery 630, the communication control circuit 640 controls the output current and/or output voltage of the wireless receiving circuit 610 and the charging management circuit 620, and the computer program causes the computer to execute the method including:
  • the communication control circuit 640 instructs the wireless transmitting device to increase the transmission power, so as to increase the voltage output by the wireless receiving circuit 610;
  • the communication control circuit 640 instructs the wireless transmitting device to increase the transmission power, so as to increase the current output by the charging management circuit 620;
  • the detection circuit 650 detects the output current of the wireless receiving circuit 610.
  • the communication control circuit 640 increases the output voltage of the wireless receiving circuit 610 so that the output current of the wireless receiving circuit 610 is less than or equal to the first current threshold.
  • the computer program stored in the readable storage medium causes the computer to execute the method further including:
  • the communication control circuit 640 increases the output current of the charging management circuit 620 until the output current of the charging management circuit 620 reaches the second current threshold.
  • the wireless charging when the output current of the charging management circuit 620 reaches the second current threshold, the wireless charging enters the second charging mode; or when the output current of the charging management circuit 620 does not reach the second current threshold And when the output voltage of the wireless receiving circuit 610 reaches the second voltage threshold, the wireless charging enters the second charging mode.
  • the communication control circuit 640 instructs the wireless transmitting device to increase the transmission power, including: the power difference between the expected received power and the actual received power of the wireless receiving circuit 610 is greater than or When it is equal to the first threshold, the communication control circuit 640 sends first indication information to the wireless transmitting device so that the power difference is smaller than the first threshold; wherein the first indication information is used to instruct the wireless transmitting device to increase the output voltage.
  • the first threshold is zero.
  • the computer program stored in the readable storage medium causes the computer to execute
  • the method also includes:
  • the communication control circuit 640 sets the current output by the charging management circuit 620 to the third current threshold.
  • the computer program stored in the readable storage medium causes the computer to execute the method further comprising: the device to be charged 30 obtains first information: temperature information of the battery 33, voltage information of the battery 33, The state of charge information of the battery 33 and the type of the power supply device 10 connected to the wireless transmitting device 20; when the first information satisfies the conditions for entering the second charging mode, adjustment is made from the first charging mode to the second charging mode.
  • the computer program stored in the readable storage medium causes the computer to execute the method further comprising: during the second charging mode, the detection circuit 34 of the device to be charged 30 detects the following Information: battery 33 temperature information, battery 33 charging current information, battery 33 voltage information, output voltage of the wireless receiving circuit 31, and the power difference between the expected power received by the wireless receiving circuit 31 and the power actually received.
  • the communication control circuit adjusts the output current of the charging management circuit 32 or the output voltage of the wireless receiving circuit 31 according to at least one of the information detected by the detection circuit 34.
  • the communication control circuit feeds back the adjusted output current of the charging management circuit 32 or the adjusted output voltage of the wireless receiving circuit 31 to the wireless transmitting device 20.
  • Fig. 1 shows a wireless charging system provided by an embodiment of the application.
  • the wireless charging method will be briefly introduced below in conjunction with Fig. 1.
  • the wireless charging system may include a power supply device 110, a wireless transmitting device 120, and a device to be charged 130.
  • the wireless transmitting device 120 may be a wireless charging base, and the device to be charged 130 may be a terminal, for example.
  • the wireless transmitting device 120 can convert the output voltage and output current of the power supply device 110 into a wireless charging signal (for example, an electromagnetic signal) for transmission through an internal wireless transmitting circuit 122.
  • the wireless transmitting circuit 122 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 (not shown in the figure).
  • the voltage conversion circuit 121 can convert the voltage output by the power supply device 110, and the micro-control unit 123 can control the voltage of the voltage conversion circuit 121 and the wireless transmitting circuit 122.
  • the device to be charged 130 can receive the wireless charging signal transmitted by the wireless transmitting circuit 122 through the wireless receiving circuit 131 and convert the wireless charging signal into the output voltage and output current of the wireless receiving circuit 131.
  • the wireless receiving circuit 131 may convert the electromagnetic signal emitted by the wireless transmitting circuit 122 into alternating current through a receiving coil or a receiving antenna (not shown in the figure), and perform operations such as rectification and/or filtering on the alternating current, and the alternating current Converted into the output voltage and output current of the wireless receiving circuit 131, the output voltage and output current received by the wireless receiving circuit 131 are adjusted by the charging management circuit 132 to obtain the expected charging voltage and/or the battery 133 in the device to be charged 130 Or the charging current is required, so that the battery 133 can be charged.
  • the charging management circuit 132 may be a charging integrated circuit (Integrated Circuit, IC).
  • the circuit to be detected in the implementation of this application can detect battery 133 information, such as battery temperature, battery voltage and battery current, etc., and can also detect the output current and output voltage of the charging management circuit 132 and the output voltage and output current of the wireless receiving circuit 131 Wait.
  • battery 133 information such as battery temperature, battery voltage and battery current, etc.
  • Fig. 2 is a schematic diagram of a device to be charged according to an embodiment of the application.
  • the device to be charged may include a Universal Serial Bus (USB) interface 210, a load switch 220, a charging management circuit 230, a battery 240, a detection circuit 250, an application processor (AP) 260, and a wireless receiving circuit 270.
  • USB Universal Serial Bus
  • AP application processor
  • the device to be charged in the embodiment of the present application can realize wireless charging and wired charging of the device to be charged by switching the load switch 220.
  • the load switch is switched to the USB interface 210 and connected to the USB interface 210
  • the standby device can be realized through the USB interface 210.
  • the load switch is switched to the wireless receiving circuit 270 to connect to the wireless receiving circuit 270
  • the device to be charged can be charged by means of wireless charging.
  • 1 in Figure 2 can be a control signal pin.
  • the OTG (On-The-Go) function of the load switch 220 is activated; when the signal is controlled to be low, the load switch 220 is turned off
  • the OTG function; 2 and 3 can be Inter-Integrated Circuit (I2C) buses, which are used for AP's access to the wireless receiving circuit 270 to control the wireless charging process, where 2 can be used to transmit clock signals 3 can be a bus used to transmit data signals; 4 can be a signal provided by the wireless receiving circuit 270 to notify the AP to read its internal specific address register through the I2C bus; 5 can also be a wireless receiving circuit A signal provided by 270 is used to tell whether the AP is connected to the wireless transmitter; 6 can be a control signal from the AP to the wireless receiving circuit 270 to turn on or turn off the wireless charging function. When the control signal is low, turn it on The function of the wireless charging circuit, when the control signal is high, the function of the wireless charging circuit is turned off.
  • I2C Inter-
  • the transmitting power of the wireless transmitting device can be increased to increase the receiving power (including voltage and current) of the wireless receiving circuit.
  • the management of the voltage and current and the voltage and current output by the charging management circuit can realize rapid charging of the device to be charged.
  • the receiving coil in the wireless receiving circuit generates severe heat, which reduces the service life of the device to be charged.
  • the embodiments of the present application provide a charging method, which can reduce the heat of the device to be charged, and further reduce the temperature of the device to be charged during the charging process, thereby prolonging the service life of the device to be charged;
  • a charging method which can reduce the heat of the device to be charged, and further reduce the temperature of the device to be charged during the charging process, thereby prolonging the service life of the device to be charged;
  • the device to be charged 130 used in the embodiments of this application may refer to a terminal, and the “terminal” may include, but is not limited to, set to be connected via a wired line (such as via a public switched telephone network (PSTN)) , Digital Subscriber Line (DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (for example, for cellular networks, Wireless Local Area Network (WLAN) , Digital TV networks such as Digital Video Broadcasting Handheld (DVB-H) networks, satellite networks, AM-FM (Amplitude Modulation-Frequency Modulation) broadcast transmitters, and/or another communication terminal ⁇ )
  • a device for receiving/sending communication signals on a wireless interface A terminal set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal” and/or a "mobile terminal”.
  • mobile terminals include, but are not limited to satellite or cellular phones; Personal Communication System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, and the Internet/ Personal Digital Assistant (PDA) with intranet access, Web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop Receiver or other electronic device including a radio telephone transceiver.
  • the device to be charged may refer to the mobile terminal being a device or a handheld terminal device, such as a mobile phone, a pad, and so on.
  • the device to be charged mentioned in the embodiments of the present application may refer to a chip system. In this embodiment, the battery of the device to be charged may or may not belong to the chip system.
  • the devices to be charged can also include other devices to be charged that require charging, such as mobile phones, mobile power sources (such as power banks, travel chargers, etc.), electric cars, laptops, drones, tablets, e-books, and e-cigarettes. , Smart standby charging equipment and small electronic products, etc. Smart devices to be charged can include, for example, watches, bracelets, smart glasses, and sweeping robots. Small electronic products may include, for example, wireless headsets, Bluetooth speakers, electric toothbrushes, and rechargeable wireless mice.
  • the wireless charging method 300 provided by an embodiment of the present application will be described in detail below with reference to FIG. 3.
  • the method 300 provided by the embodiment of the present application may include steps 310-340.
  • the communication control circuit instructs the wireless transmitting device to increase the transmission power, so as to increase the voltage output by the wireless receiving circuit.
  • the communication control circuit in the embodiments of the present application may be the internal AP of the device to be charged mentioned above, and the control function of the communication control circuit may be realized by the AP, or may be realized by the micro control unit (MCU) and the AP Realize together.
  • MCU micro control unit
  • the first charging mode in the embodiment of the present application may be a BPP mode, and its power is generally 5W, that is, a charging mode with a voltage of 5V and a current of 1A, and the second charging mode may be an EPP mode, and its power is generally 15W-25W.
  • the BPP mode and the EPP mode may also be referred to as the BPP state and the EPP state.
  • the BPP state and the EPP state in the embodiments of the present application refer to two of the charging states in the wireless charging process. To facilitate understanding, the wireless charging process will be briefly introduced first.
  • the charging state of the device to be charged may include four states: BPP, boost, current boost, and EPP.
  • BPP the state where the charging power is equal to 5W
  • EPP the state where the charging power is between 15W-25W.
  • BPP and EPP the boost state and the up current state can be passed.
  • boost state the charging voltage of the battery can be increased, and the charging current of the battery can be increased during the up current state.
  • the device to be charged may not enter the wireless charging state.
  • the communication control circuit of the device to be charged first detects the signal of the wireless receiving circuit, and determines whether to enter the BPP state to charge according to the signal. If the communication control circuit of the device to be charged detects a rising edge interrupt signal, it starts a 500ms cycle execution task, and then starts to monitor the wireless charging process; if the communication control circuit in the device to be charged detects a falling edge interrupt Signal, the communication control circuit controls the device to be charged to exit the wireless charging process.
  • the first charging mode takes the BPP state
  • the second charging mode takes the EPP state as an example.
  • the communication control circuit instructs the wireless transmitting device to increase the transmission power, so as to increase the current output by the charging management circuit.
  • the wireless receiving circuit in the embodiment of the present application may include a receiving coil or a receiving antenna, and a shaping circuit such as a rectifier circuit and/or a filter circuit connected to the receiving coil and the receiving antenna.
  • the receiving antenna or the receiving coil can be used to convert electromagnetic signals into alternating current
  • the shaping circuit can be used to convert the alternating current into the output voltage and output current of the wireless receiving circuit.
  • the embodiment of the present application does not specifically limit the specific form of the shaping circuit and the form of the output voltage and output current of the wireless receiving circuit obtained after the shaping circuit is shaped.
  • the charging management circuit in the embodiment of the present application may be a charging integrated circuit (Integrated Circuit, IC).
  • the charging management circuit can be used to manage the charging voltage and/or charging current of the battery.
  • the charging management circuit may include a voltage feedback function and/or a current feedback function to realize the management of the charging voltage and/or charging current of the battery.
  • the detection circuit detects the output current of the wireless receiving circuit.
  • the communication control circuit increases the output voltage of the wireless receiving circuit so that the output current of the wireless receiving circuit is less than or equal to the first current threshold. Current threshold.
  • the first voltage threshold is 12V and the first current threshold is 1.05A as an example for description.
  • the temperature is appropriate, For example, if the battery temperature is in the range of -3°C to 55°C, the device to be charged first enters the BPP state for charging, and then can be adjusted from the BPP state to the EPP state.
  • the output voltage of the wireless receiving circuit can be increased first.
  • the communication control circuit can increase the output current of the charging management circuit, for example, the communication control circuit It can send instruction information to the charging management circuit to instruct the charging management circuit to increase the output current.
  • the communication control circuit can feed back the output voltage and output current of the charging management circuit to the wireless transmitting device, so that the wireless transmitting device is based on the received feedback information Adjust the output voltage of the wireless transmitting circuit.
  • the communication control circuit can The output voltage of the wireless receiving circuit is increased.
  • the communication control circuit can directly control and increase the output voltage of the wireless receiving circuit, or can send instruction information to instruct the wireless receiving circuit to increase the output voltage, thereby reducing the output current of the wireless receiving circuit.
  • the communication control circuit may also increase the output voltage of the wireless receiving circuit to make the output current of the wireless receiving circuit smaller than the first current threshold.
  • the communication control circuit can adjust the output voltage of the wireless receiving circuit by judging whether the output current of the wireless receiving circuit is greater than the first current threshold, thereby reducing the output of the wireless receiving circuit.
  • the heating of the device to be charged can be reduced, and the temperature of the device to be charged during the charging process can be further reduced, so as to extend the service life of the device to be charged;
  • the heating of the wireless receiving circuit can be controlled, so that the charging speed can be improved.
  • the wireless charging method 300 may further include step 340.
  • the communication control circuit increases the output current of the charging management circuit until the output current of the charging management circuit reaches the first current threshold. 2. Current threshold.
  • the output voltage of the wireless receiving circuit can be increased first.
  • the communication control circuit can increase the output current of the charging management circuit.
  • the communication control circuit can increase the output voltage of the wireless receiving circuit, thereby reducing the output current of the wireless receiving circuit.
  • the communication control circuit increases the output voltage of the wireless receiving circuit to reduce the output current of the wireless receiving circuit, if the output current of the wireless receiving circuit is less than or equal to 1.05A, the communication control circuit can continue to increase the output of the charging management circuit The current until the output current of the charging management circuit reaches the second current threshold, for example, it can be 1.5A.
  • the first current threshold may be 1.05A
  • the second current threshold may be 1.5A
  • the numerical values in the embodiments of the present application are only examples, and may also be other numerical values, which should not specifically limit the present application.
  • the wireless charging when the output current of the charging management circuit reaches a second current threshold, the wireless charging enters the EPP state; or when the output current of the charging management circuit does not reach the first current threshold.
  • the output current of the charging management circuit when the communication control circuit increases the output current of the charging management circuit by the second current threshold, the output current of the charging management circuit may no longer be increased. It is understandable that if the output current of the charging management circuit is continuously increased and exceeds the maximum charging current of the battery, the battery of the device to be charged may be damaged, thereby reducing the service life of the battery. In severe cases, the safety of the device to be charged may be endangered. .
  • the communication control circuit in the process of increasing the output current of the charging management circuit, it can be determined whether the output current of the wireless receiving circuit is greater than the first current threshold, and the communication control circuit can dynamically adjust the output voltage of the wireless receiving circuit so as to make wireless receiving The output current of the circuit is less than or equal to the first current threshold to reduce the heating of the receiving coil in the wireless receiving circuit. Therefore, in the process of increasing the output current of the charging management circuit, it is possible that the output current of the charging management circuit does not reach the second current threshold, but the output voltage of the wireless receiving circuit has increased to the first voltage threshold. At this time, the communication control The circuit can no longer increase the output current of the charging management circuit, and enter the EPP state in advance to charge the device to be charged.
  • the second voltage threshold is 15V
  • the first current threshold is 1.05A
  • the second current threshold is 1.5A.
  • the device to be charged when the device to be charged is connected to the wireless transmitter, the device to be charged first enters the BPP state for charging, and then can be adjusted from the BPP state to the EPP state. In the process of adjusting from the BPP state to the EPP state, the output voltage of the wireless reception can be increased first, and then the output current of the charging management circuit can be increased.
  • the communication control circuit increases the output current of the charging management circuit to 1.2A, the power transmitted by the wireless transmitting circuit cannot meet the voltage and voltage required by the battery.
  • the current is current, it can communicate with the wireless transmitting device through the communication control circuit, so that the voltage regulating circuit of the wireless transmitting device increases the output voltage of the wireless transmitting circuit.
  • the output voltage of the wireless transmitting circuit increases to 14V, the power of the wireless receiving circuit It will also increase, including an increase in the output voltage of the wireless receiving circuit and/or an increase in output current.
  • the communication control circuit can again increase the charging management circuit The output current is increased to 1.4A. Similarly, the communication control circuit feeds back its output current and output voltage to the wireless transmitting device, and the wireless transmitting device adjusts the output voltage of the wireless transmitting circuit according to the feedback output current and output voltage of the charging management circuit. For example, it is increased to 16V. At this time, if the output voltage of the wireless receiving circuit increases and the output current of the wireless receiving circuit is still less than the first current threshold, the output current of the charging management circuit can continue to be increased until the output current of the charging management circuit reaches At the second current threshold, the wireless charging enters the EPP state.
  • the communication control circuit increases the output current of the charging management circuit to 1.2A, after the voltage regulating circuit of the wireless transmitting device increases the output voltage of the wireless transmitting circuit, the output current of the wireless receiving circuit is greater than the first
  • the communication control circuit can increase the output voltage of the wireless receiving circuit to reduce the output current of the wireless receiving circuit; after the communication control circuit adjusts the output voltage of the wireless receiving circuit, the output current of the wireless receiving circuit is still greater than In the case of the first current threshold, the communication control circuit can continue to increase the output voltage of the wireless receiving circuit.
  • the output voltage of the wireless receiving circuit reaches the first voltage threshold, it can enter the EPP state in advance regardless of the output current of the charging management circuit.
  • the communication control circuit may also feed back the output voltage and output current of the wireless receiving circuit to the wireless transmitting device, so that the wireless transmitting device adjusts the output voltage of the wireless transmitting circuit according to the feedback voltage and current.
  • the communication control circuit instructs the wireless transmitting device to increase the transmitting power of the wireless transmitting device, including: a power difference between the power expected to be received by the wireless receiving circuit and the power actually received In the case that the power difference is greater than or equal to the first threshold, the communication control circuit sends the first indication information to the wireless transmitting device, so that the power difference is less than the first threshold; wherein, the The first indication information is used to instruct the wireless transmitting device to increase the output voltage of the wireless transmitting circuit.
  • the communication control circuit may feed back the first indication information to the wireless transmitting device when the power difference between the power expected to be received by the wireless receiving circuit and the power actually received is greater than or equal to the first threshold. , Instruct the voltage regulating circuit of the wireless transmitting device to adjust the voltage to increase the output voltage of the wireless transmitting circuit.
  • the communication control circuit can communicate wirelessly with the wireless transmitting device so that the wireless transmitting device can adjust the output voltage of the wireless transmitting circuit so that the output voltage of the wireless receiving circuit can be increased. Therefore, the output voltage of the charging management circuit can meet the charging demand of the battery.
  • the wireless charging before the wireless charging is ready to enter the boost state, it can be determined whether the power difference between the expected received power of the wireless receiving circuit and the actually received power is greater than or equal to the first threshold, because before the boost state , The wireless charging is in the BPP state, and the expected received power of the wireless receiving circuit is consistent with the actual received power, so the output voltage of the wireless transmitting circuit can be fed back to the wireless transmitting device. In this process, the output voltage of the wireless receiving circuit can be gradually increased.
  • the device to be charged sends first indication information to the wireless transmitting device, instructing the output voltage of the wireless transmitting circuit of the wireless transmitting device to increase by 1V, and the wireless transmitting device uses the voltage regulating circuit to increase the output voltage of the wireless transmitting circuit. After the output voltage is increased by 1V, the power of the wireless receiving circuit increases accordingly.
  • the communication control circuit sends the first indication information to the wireless transmitting device again, indicating wireless The output voltage of the wireless transmitting circuit of the transmitting device is increased by 1V, and the cycle is repeated until the output voltage of the wireless receiving circuit is increased to 12V.
  • the wireless charging method 300 may further include step 360.
  • the method further includes: the communication control circuit setting the current output by the charging management circuit to a third current threshold.
  • the communication control circuit may set the current output by the charging management circuit to the battery to the third current threshold, for example, it may be set to 0.3A, That is to say, in this process, the current output from the charging management circuit to the battery can be set to be smaller, so as to avoid the undercharge caused by the excessive charging current of the battery during the adjustment of the charging state from the BPP state to the EPP state. Pressure protection issues.
  • the receiving chip in the wireless receiving circuit may be damaged. That is to say, in the process of adjusting from the BPP state to the EPP state, if the output current of the charging management circuit to the battery is set to 0, it will cause the battery to be temporarily charged. At this time, if the output voltage of the wireless receiving circuit is continuously increased , May cause damage to the receiving chip.
  • the communication control circuit sets the output current of the charging management circuit to the third current threshold, which can make the boost state during the wireless charging process more stable, and can avoid the excessive charging current of the battery during the boost process.
  • the resulting undervoltage protection problem can also avoid damage to the device to be charged due to suspension of charging the battery, thereby protecting the device to be charged.
  • the communication control circuit may not set the current output by the charging management circuit to the battery to 0.3A, or it may be set It is 0.4A or 0.25A, etc., which is not specifically limited in this application.
  • the method further includes: the device to be charged acquiring first information: temperature information of the battery, voltage information of the battery, state of charge information of the battery, and The type of power supply equipment connected to the wireless transmitting device; when the first information satisfies the conditions for entering the EPP state, adjust from the BPP state to the EPP state
  • the detection circuit first detects the temperature information of the battery, and determines the charging state according to the temperature information of the battery. For example, when the battery temperature is less than -3.5°C or greater than or equal to 54°C, turn off charging and stop charging the battery; if the battery temperature is greater than or equal to -3.5°C and less than 18.5°C or the battery temperature is greater than or equal to 44°C and less than 54°C °C, the wireless charging is forced to always work in the BPP state, and the battery is charged in the BPP mode.
  • the device to be charged when the battery temperature is greater than or equal to 18.5°C and less than 44°C, the device to be charged will enter the BPP state for charging by default. At this temperature, the device to be charged may enter the EPP state for charging, and a wireless transmitting device needs to be obtained.
  • the type of the connected power supply device so that the device to be charged can determine whether the charging can enter the EPP state according to the type returned by the wireless transmitting device. If the power supply device does not respond or the type of power supply device connected to the power supply device does not support fast charging, the device to be charged will always work in the BPP state; if the power supply device returns to the connected power supply device, the type of power supply device supports fast charging.
  • the battery voltage is greater than 3.3V and less than 4.4V, and when the battery state of charge is less than or equal to 90, the device to be charged can start to enter the wireless fast charging state, that is, the EPP state.
  • the power supply device can be an adapter, a mobile power supply, a car charger, or a computer.
  • the detection circuit can continuously detect some information during the charging process to dynamically adjust The output current of the charging management circuit and the output voltage of the wireless receiving circuit.
  • the detection circuit of the device to be charged detects any one of the following information, including the battery temperature information and the battery charging current information, The battery voltage information, the output voltage of the wireless receiving circuit, the power difference between the expected power received by the wireless receiving circuit and the power actually received; the communication control circuit is based on the information detected by the detection circuit Any one of the information in adjusting the output current of the charging management circuit or the output voltage of the wireless receiving circuit; the communication control circuit adjusts the adjusted output current of the charging management circuit or the adjusted wireless receiving circuit The output voltage of the circuit is fed back to the wireless transmitting device.
  • the detection circuit can continuously detect the battery temperature, battery charging current, battery voltage, the output voltage of the wireless receiving circuit, and the expected received power of the wireless receiving circuit and the actual received power Information such as the power difference between the powers, so that the communication control circuit adjusts the output current of the charging management circuit or the output voltage of the wireless receiving circuit according to the information detected by the detection circuit, and feeds the adjusted current or voltage back to the first
  • the communication control circuit is used for the first communication control circuit to adjust the transmission power of the wireless transmission circuit according to the received feedback information.
  • the communication control circuit adjusting the output current of the charging management circuit according to at least one of the information detected by the detection circuit includes: When the temperature of the battery is greater than or equal to the first temperature threshold, and the detected output current of the charging management circuit is greater than the fourth current threshold, the communication control circuit reduces the output current of the charging management circuit by the fifth current threshold And the lowest is lowered to the fourth current threshold; when the temperature of the battery detected by the detection circuit is greater than or equal to the second temperature threshold, and the detected output current of the charge management circuit is greater than the sixth current threshold, The communication control circuit sets the output current of the charging management circuit to a sixth current threshold; the temperature of the battery detected by the detection circuit is less than the third temperature threshold, and the detected output current of the charging management circuit is less than In the case of the seventh current threshold, the communication control circuit sets the output current of the charging management circuit to the seventh current threshold.
  • the communication control circuit can be based on the battery temperature. And the current output from the charging management circuit to the battery determine and adjust the current output from the charging management circuit to the battery.
  • the communication control circuit can reduce the current output by the charging management circuit to the battery by 0.2A, but it should be noted that during the reduction process, the current output by the charging management circuit to the battery can be as low as 0.5A.
  • the current output from the charging management circuit to the battery can be reduced by 0.2A, that is, 0.6A; if the current output from the charging management circuit to the battery is 0.65A, you can Reduce the current output from the charging management circuit to the battery to 0.5A.
  • the communication control circuit can set the current output from the charging management circuit to the battery to 0.8A; if the battery temperature is less than 37°C and the output current of the charging management circuit is less than 1.6A, for example, when the battery temperature is 36°C and the charging management When the current output by the circuit to the battery is 1.5A, the communication control circuit can switch to the up-current state to increase the current output by the charging management circuit to the battery to the maximum charging current value, for example, 1.5A.
  • the communication control circuit adjusting the output current of the charging management circuit according to at least one of the information detected by the detection circuit includes:
  • the detection circuit detects that the absolute value of the power difference between the power expected to be received by the wireless receiving circuit and the power actually received is greater than or equal to the first threshold for three consecutive times and the output current of the charging management circuit is less than or
  • the communication control circuit adjusts the output voltage of the wireless receiving circuit according to the power difference; when the power difference is less than In the case of 5, the communication control circuit reduces the output voltage of the wireless receiving circuit by a third voltage threshold; in the case that the power difference is greater than or equal to 5 and less than 20, the communication control circuit reduces the The output voltage of the wireless receiving circuit is lowered by a fourth voltage threshold; when the power difference is greater than or equal to 20, the communication control circuit lowers the output voltage of the wireless receiving circuit by a fifth voltage threshold.
  • the output voltage of the wireless receiving circuit may be determined and adjusted according to the power difference between the power expected to be received by the wireless receiving circuit and the power actually received.
  • the power difference between the expected received power of the wireless receiving circuit and the actually received power is 1, it means that the power difference between the actual received power and the expected received power of the wireless receiving circuit is relatively low.
  • the output voltage of the wireless receiving circuit can be reduced by 0.02V; if the power difference is 10, it means that the power difference between the power actually received by the wireless receiving circuit and the expected received power is large at this time, and the wireless The output voltage of the receiving circuit is reduced by 0.05V; if the power difference is 23, it means that the power difference between the power actually received by the wireless receiving circuit and the expected received power is very large, and the output voltage of the wireless receiving circuit can be reduced. Decrease by 0.1V. But it should be noted that in this process, the output voltage of the reduced wireless receiving circuit is at least 12V.
  • the frequency at which the detection circuit detects the power difference between the power expected to be received by the wireless receiving circuit and the power actually received can be of the ms level, for example, it can be detected once in 10 ms.
  • the power difference is greater than or equal to the first threshold, and the output voltage of the wireless receiving circuit can be adjusted.
  • a device to be charged 600 may include a wireless receiving circuit 610, a charging management circuit 620, a battery 630, a communication control circuit 640, and a detection circuit 650.
  • the communication control circuit 640 is configured to instruct the wireless transmitting device to increase the transmission power during the adjustment of the wireless charging state of the battery 630 from the first charging mode to the second charging mode, so that the voltage output by the wireless receiving circuit 610 is increased.
  • the communication control circuit 640 is further configured to: when the voltage output by the wireless receiving circuit 610 reaches a first voltage threshold, instruct the wireless transmitting device to increase the transmission power so as to increase the current output by the charging management circuit 620.
  • the device to be charged further includes a detection circuit 650 for detecting the output current of the wireless receiving circuit 610.
  • the communication control circuit 640 is further configured to: when the output current of the wireless receiving circuit 610 is greater than a first current threshold, increase the output voltage of the wireless receiving circuit 610 so that the output current of the wireless receiving circuit 610 is less than Or equal to the first current threshold.
  • the communication control circuit 640 is further configured to: when the output current of the wireless receiving circuit 610 is less than or equal to the first current threshold, increase the charging management circuit 620 Until the output current of the charging management circuit 620 reaches the second current threshold.
  • the wireless charging when the output current of the charging management circuit 620 reaches a second current threshold, the wireless charging enters the second charging mode; or when the output current of the charging management circuit 620 does not When the second current threshold is reached and the output voltage of the wireless receiving circuit 610 reaches the second voltage threshold, the wireless charging enters the second charging mode.
  • the communication control circuit 640 is specifically configured to: when the power difference between the expected power received by the wireless receiving circuit 610 and the actually received power is greater than or equal to a first threshold In this case, the first indication information is sent to the wireless transmission device so that the power difference is smaller than the first threshold; wherein, the first indication information is used to instruct the wireless transmission device to increase the The output voltage of the wireless transmitting circuit.
  • the first threshold is zero.
  • the communication control circuit 640 is further configured to: before the wireless charging state of the battery 630 is adjusted from the first charging mode to the second charging mode, manage the charging The current output by the circuit 620 is set to the third current threshold.
  • the communication control circuit 640 is further configured to: obtain first information: temperature information of the battery 630, voltage information of the battery 630, and state of charge information of the battery 630 And the type of the power supply device connected to the wireless transmitting device; when the first information satisfies the condition for entering the second charging mode, adjustment is made from the first charging mode to the second charging mode.
  • the detection circuit 650 is further configured to detect the following information during the second charging mode: the battery temperature information, the battery charging current information, and the battery voltage Information, the output voltage of the wireless receiving circuit 610, the power difference between the power expected to be received by the wireless receiving circuit 610 and the power actually received; the communication control circuit 640 is also used to: according to the detection circuit At least one of the information detected by 650 adjusts the output current of the charging management circuit 620 or the output voltage of the wireless receiving circuit 610; adjusts the adjusted output current of the charging management circuit 620 or the adjusted output current The output voltage of the wireless receiving circuit 610 is fed back to the wireless transmitting device.
  • the communication control circuit 640 is specifically configured to: the temperature of the battery detected by the detection circuit is greater than or equal to a first temperature threshold, and the detected output of the charge management circuit When the current is greater than the fourth current threshold, the output current of the charging management circuit is reduced by the fifth current threshold and to the fourth current threshold at the lowest; the temperature of the battery detected by the detection circuit is greater than or equal to the second Temperature threshold, and the detected output current of the charging management circuit is greater than the sixth current threshold, the output current of the charging management circuit is set to the sixth current threshold; the detection circuit detects the battery In a case where the temperature is less than the third temperature threshold and the detected output current of the charging management circuit is less than the seventh current threshold, the output current of the charging management circuit is set to the seventh current threshold.
  • the communication control circuit 640 is specifically configured to: the detection circuit detects the absolute value of the power difference between the power expected to be received by the wireless receiving circuit and the power actually received When three consecutive times are greater than or equal to the first threshold, the output current of the charging management circuit is less than or equal to the eighth current threshold, and the output voltage of the wireless receiving circuit is greater than the first voltage threshold, adjust according to the power difference The output voltage of the wireless receiving circuit; when the power difference is less than 5, the output voltage of the wireless receiving circuit is reduced by a third voltage threshold; when the power difference is greater than or equal to 5 and less than 20 Next, the output voltage of the wireless receiving circuit is reduced by a fourth voltage threshold; if the power difference is greater than or equal to 20, the output voltage of the wireless receiving circuit is reduced by a fifth voltage threshold.
  • An embodiment of the present application also provides a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are configured to execute any one of the above-mentioned wireless charging methods 300.
  • the embodiments of the present application also provide a computer program product.
  • the computer program product includes a computer program stored on a computer-readable storage medium.
  • the computer program includes program instructions. When the program instructions are executed by a computer, the computer program The computer executes any one of the wireless charging methods 300 described above.
  • the traditional wireless charging technology generally connects the power supply device (such as an adapter) with a wireless charging device (such as a wireless charging base), and transmits the output power of the power supply device wirelessly (such as electromagnetic waves) to the waiting device through the wireless charging device. Charging equipment, charging equipment to be charged wirelessly.
  • wireless charging methods are mainly divided into three methods: magnetic coupling (or electromagnetic induction), magnetic resonance, and radio waves.
  • mainstream wireless charging standards include QI standards, Power Matters Alliance (PMA) standards, and Wireless Power Alliance (Alliance for Wireless Power, A4WP).
  • QI QI standards
  • PMA Power Matters Alliance
  • A4WP Wireless Power Alliance
  • Both the QI standard and the PMA standard use magnetic coupling for wireless charging.
  • the A4WP standard uses magnetic resonance for wireless charging.
  • the wireless charging system includes a power supply device 10, a wireless charging signal transmitting device 20, and a charging control device 30.
  • the transmitting device 20 may be, for example, a wireless charging base, and the charging control device 30 may refer to the device to be charged, such as It can be a terminal.
  • the output voltage and output current of the power supply device 10 are transmitted to the transmitting device 20.
  • the transmitting device 20 can convert the output voltage and output current of the power supply device 10 into a wireless charging signal (for example, an electromagnetic signal) through an internal wireless transmitting circuit 21 for transmission.
  • a wireless charging signal for example, an electromagnetic signal
  • the wireless transmitting circuit 21 can convert the output current of the power supply device 10 into alternating current, and convert the alternating current into a wireless charging signal through a transmitting coil or a transmitting antenna.
  • FIG. 7 only exemplarily shows a schematic structural diagram of the wireless charging system, but the embodiment of the present application is not limited thereto.
  • the transmitting device 20 may also be called a wireless charging signal transmitting device
  • the charging control device 30 may also be called a wireless charging signal receiving device.
  • the wireless charging signal receiving device may be, for example, a chip with a wireless charging signal receiving function, which can receive the wireless charging signal transmitted by the transmitting device 20; the wireless charging signal receiving device may also be a device to be charged.
  • the charging control device 30 can receive the wireless charging signal transmitted by the wireless transmitting circuit 21 through the wireless receiving circuit 31, and convert the wireless charging signal into the output voltage and output current of the wireless receiving circuit 31.
  • the wireless receiving circuit 31 may convert the wireless charging signal transmitted by the wireless transmitting circuit 21 into alternating current through a receiving coil or a receiving antenna, and perform operations such as rectification and/or filtering on the alternating current to convert the alternating current into the wireless receiving circuit 31 The output voltage and output current.
  • the transmitting device 20 and the charging control device 30 negotiate in advance the transmitting power of the wireless transmitting circuit 21. Assuming that the power negotiated between the transmitting device 20 and the charging control device 30 is 5W, the output voltage and output current of the wireless receiving circuit 31 are generally 5V and 1A. Assuming that the power negotiated between the transmitting device 20 and the charging control device 30 is 10.8W, the output voltage and output current of the wireless receiving circuit 31 are generally 9V and 1.2A.
  • the output voltage of the wireless receiving circuit 31 is not suitable to be directly applied to both ends of the battery 33, it is necessary to perform constant voltage and/or constant current control through the charging management circuit 32 in the charging control device 30 to obtain the charging control device 30 The expected charging voltage and/or charging current of the battery 33 inside.
  • the charging management circuit 32 can be used to transform the output voltage of the wireless receiving circuit 31 so that the output voltage and/or output current of the charging management circuit 32 meets the expected charging voltage and/or charging current requirements of the battery 33.
  • the charging management circuit 32 may be, for example, the charging management circuit mentioned in the embodiment of the present application.
  • the conversion circuit 32 can be used to manage the charging voltage and/or charging current of the battery 33.
  • the conversion circuit 32 may include a voltage feedback function and/or a current feedback function to realize the management of the charging voltage and/or charging current of the battery 33.
  • the communication control circuit may transmit instruction information to the transmitting device to instruct the transmitting device to increase the transmitting power to increase the output power of the wireless receiving circuit. Therefore, during the charging process, the communication control circuit can communicate with the transmitting device, so that the output power of the wireless receiving circuit can meet the charging requirements of the battery in different charging stages.
  • the embodiment of the present application does not specifically limit the communication mode between the charging control device 30 and the transmitting device 20.
  • the charging control device 30 and the transmitting device 20 may adopt Bluetooth (bluetooth) communication, wireless fidelity (Wi-Fi) communication, or backscatter modulation (or power Load modulation method) communication, short-range wireless communication based on high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communication or mobile communication and other wireless communication methods for communication.
  • the short-range wireless communication module based on a high carrier frequency may include an IC chip with an extremely high frequency (EHF) antenna encapsulated inside.
  • the high carrier frequency may be 60 GHz.
  • the optical communication may use an optical communication module for communication.
  • the optical communication module may include an infrared communication module, and the infrared communication module may use infrared to transmit information.
  • mobile communication may be communication using a mobile communication module.
  • the mobile communication module can use mobile communication protocols such as 5G communication protocol, 4G communication protocol or 3G communication protocol for information transmission.
  • the reliability of communication can be improved, and the voltage ripple caused by signal coupling communication can be avoided. Wave affects the voltage processing process of the step-down circuit.
  • the charging control device 30 and the transmitting device 20 may also communicate in a wired communication manner of a data interface.
  • Fig. 8 is another schematic diagram of a charging system provided by an embodiment of the present application.
  • the wireless charging signal transmitting device 20 may further include a charging interface 23, and the charging interface 23 may be used to connect to an external power supply device 10.
  • the wireless transmitting circuit 21 can also be used to generate a wireless charging signal according to the output voltage and output current of the power supply device 10.
  • the first communication control circuit 22 can also adjust the amount of power drawn by the wireless transmission circuit 21 from the output power of the power supply device 10 during the wireless charging process to adjust the transmission power of the wireless transmission circuit 21 so that the wireless transmission circuit transmits
  • the power can meet the charging demand of the battery.
  • the power supply device 10 can also directly output a relatively large fixed power (such as 40W), and the first communication control circuit 22 can directly adjust the amount of power drawn by the wireless transmitting circuit 21 from the fixed power provided by the power supply device 10.
  • the output power of the power supply device 10 may be fixed.
  • the power supply device 10 can directly output a relatively large fixed power (such as 40W), and the power supply device 10 can provide the wireless charging device 20 with output voltage and output current according to the fixed output power.
  • the first communication control circuit 22 can extract a certain amount of power from the fixed power of the power supply device for wireless charging according to actual needs. That is to say, the embodiment of the present application allocates the control right to adjust the transmission power of the wireless transmission circuit 21 to the first communication control circuit 22, and the first communication control circuit 22 can receive the instruction information sent by the second communication control circuit 35.
  • the transmission power of the wireless transmission circuit 21 is adjusted immediately to meet the current charging requirements of the battery, which has the advantages of fast adjustment speed and high efficiency.
  • the embodiment of the present application does not specifically limit the manner in which the first communication control circuit 22 extracts the amount of power from the maximum output power provided by the power supply device 10.
  • a voltage conversion circuit 24 may be provided inside the transmitting device 20 of the wireless charging signal, and the voltage conversion circuit 24 may be connected to the transmitting coil or the transmitting antenna for adjusting the power received by the transmitting coil or the transmitting antenna.
  • the voltage conversion circuit 24 may include, for example, a pulse width modulation (Pulse Width Modulation, PWM) controller and a switch unit.
  • PWM pulse width modulation
  • the first communication control circuit 22 can adjust the transmission power of the wireless transmission circuit 21 by adjusting the duty ratio of the control signal sent by the PWM controller.
  • the charging interface 23 may be a USB interface.
  • the USB interface may be, for example, a USB 2.0 interface, a micro USB interface, or a USB TYPE-C interface.
  • the charging interface 23 may also be a lightning interface, or any other type of parallel port and/or serial port that can be used for charging.
  • the embodiment of the present application does not specifically limit the communication mode between the first communication control circuit 22 and the power supply device 10.
  • the first communication control circuit 22 may be connected to the power supply device 10 through a communication interface other than the charging interface, and communicate with the power supply device 10 through the communication interface. As another example, the first communication control circuit 22 may communicate with the power supply device 10 in a wireless manner. For example, the first communication control circuit 22 may perform Near Field Communication (NFC) with the power supply device 10.
  • NFC Near Field Communication
  • the first communication control circuit 22 can communicate with the power supply device 10 through the charging interface 23 without setting an additional communication interface or other wireless communication module, which can simplify the implementation of the wireless charging device 20.
  • the charging interface 23 is a USB interface
  • the first communication control circuit 22 can communicate with the power supply device 10 based on the data lines (such as D+ and/or D- lines) in the USB interface.
  • the charging interface 23 may be a USB interface (such as a USB TYPE-C interface) supporting a power delivery (PD) communication protocol, and the first communication control circuit 22 and the power supply device 10 may communicate based on the PD communication protocol.
  • PD power delivery
  • adjusting the transmission power of the wireless charging signal by the first communication control circuit 22 may refer to that the first communication control circuit 22 adjusts the transmission power of the wireless charging signal by adjusting the input voltage and/or input current of the wireless transmission circuit 21.
  • the first communication control circuit may increase the transmission power of the wireless transmission circuit by increasing the input voltage of the wireless transmission circuit.
  • the device to be charged 30 may further include a first charging channel 36, through which the output voltage and/or output current of the wireless receiving circuit 31 can be provided to the battery 33, The battery 33 is charged.
  • a voltage conversion circuit 32 may be further provided on the first charging channel 36, and the input end of the voltage conversion circuit 32 is electrically connected to the output end of the wireless receiving circuit 31, and is used to perform a constant voltage on the output voltage of the wireless receiving circuit 31. And/or constant current control to charge the battery 33 so that the output voltage and/or output current of the voltage conversion circuit 32 matches the charging voltage and/or charging current currently required by the battery.
  • increasing the transmitting power of the wireless transmitting circuit 21 may refer to increasing the transmitting voltage of the wireless transmitting circuit 21, and increasing the transmitting voltage of the wireless transmitting circuit 21 may be achieved by increasing the output voltage of the voltage conversion circuit 24.
  • the first communication control circuit 22 receives the instruction to increase the transmission power sent by the second communication control circuit 35, it can increase the transmission power of the wireless transmission circuit 21 by increasing the output voltage of the voltage conversion circuit 24.
  • the wireless charging signal receiving device may further include a detection circuit 34 that can detect the voltage and/or charging current of the battery 33, and the second communication control circuit 35 can be based on the voltage and/or charging current of the battery 33 , Sending instruction information to the first communication control circuit 22 to instruct the first communication control circuit 22 to adjust the output voltage and output current corresponding to the transmitting power of the wireless transmitting circuit 21.
  • the transmit power of the wireless charging signal needs to be increased to meet the current charging requirements of the battery.
  • the charging current of the battery may continue to decrease, and the charging power required by the battery will also decrease accordingly.
  • the transmit power of the wireless charging signal needs to be reduced to meet the current charging requirements of the battery.
  • the first communication control circuit 22 can adjust the transmission power of the wireless charging signal according to the instruction information. It can mean that the first communication control circuit 22 adjusts the transmission power of the wireless charging signal so that the transmission power of the wireless charging signal is equal to the current required charging voltage of the battery. And/or the charging current.
  • the matching of the transmission power of the wireless transmission circuit 21 with the charging voltage and/or charging current currently required by the battery 33 may refer to the configuration of the transmission power of the wireless charging signal by the first communication control circuit 22 such that the output voltage of the first charging channel 36 And/or the output current matches the charging voltage and/or charging current currently required by the battery 33 (or, the configuration of the transmission power of the wireless charging signal by the first communication control circuit 22 makes the output voltage of the first charging channel 36 and/or Or the output current meets the charging requirements of the battery 33 (including the requirements of the battery 33 for charging voltage and/or charging current)).
  • the output voltage and/or output current of the first charging channel 36 matches the charging voltage and/or charging current currently required by the battery 33” includes: the first charging channel 36
  • the voltage value and/or current value of the output direct current is equal to the charging voltage value and/or charging current value required by the battery 33 or within a floating preset range (for example, the voltage value fluctuates from 100 mV to 200 mV, the current value Floating from 0.001A to 0.005A, etc.).
  • the second communication control circuit 35 described above performs wireless communication with the first communication control circuit 22 based on the voltage and/or charging current of the battery 33 detected by the detection circuit 34, so that the first communication control circuit 22 can perform wireless communication according to the voltage and/or charging current of the battery 33
  • the charging current and adjusting the transmission power of the wireless transmission circuit 21 may include: during the constant current charging phase of the battery 33, the second communication control circuit 35 performs wireless communication with the first communication control circuit 22 according to the detected voltage of the battery, so that A communication control circuit 22 adjusts the transmission power of the wireless transmission circuit 21 so that the output voltage of the first charging channel 36 matches the charging voltage required by the battery in the constant current charging stage (or, so that the output voltage of the first charging channel 36 meets The battery 33 requires charging voltage during the constant current charging stage).
  • Fig. 9 is another example of a charging system provided by an embodiment of the present application.
  • the wireless charging signal transmitting device 20 corresponding to the embodiment of FIG. 9 does not obtain electric energy from the power supply device 10, but directly converts the externally input AC power (such as commercial power) into the above-mentioned wireless charging signal.
  • the wireless charging signal transmitting device 20 may further include a voltage conversion circuit 24 and a power supply circuit 25.
  • the power supply circuit 25 can be used to receive externally input AC power (such as commercial power), and generate the output voltage and output current of the power supply circuit 25 according to the AC power.
  • the power supply circuit 25 can rectify and/or filter the alternating current to obtain direct current or pulsating direct current, and transmit the direct current or pulsating direct current to the voltage conversion circuit 24.
  • the voltage conversion circuit 24 can be used to receive the output voltage of the power supply circuit 25 and convert the output voltage of the power supply circuit 25 to obtain the output voltage and output current of the voltage conversion circuit 24.
  • the wireless transmission circuit 21 can also be used to generate a wireless charging signal according to the output voltage and output current of the voltage conversion circuit 24.
  • the embodiment of the present application integrates an adapter-like function inside the wireless charging signal transmitting device 20, so that the wireless charging signal transmitting device 20 does not need to obtain power from an external power supply device, which improves the integration of the wireless charging signal transmitting device 20 And reduce the number of devices required to realize the wireless charging process.
  • the wireless charging signal transmitting device 20 may support the first wireless charging mode and the second wireless charging mode, and the wireless charging signal transmitting device 20 charges the device to be charged in the first wireless charging mode.
  • the wireless charging signal transmitting device 20 working in the first wireless charging mode is filled with the equipment to be charged with the same capacity The battery time is shorter.
  • the charging method provided in the embodiment of the present application may use the first charging mode for charging, and may also use the second charging mode for charging, which is not limited in the embodiment of the present application.
  • the second wireless charging mode may be a so-called normal wireless charging mode, for example, may be a traditional wireless charging mode based on the QI standard, the PMA standard, or the A4WP standard.
  • the first wireless charging mode may be a fast wireless charging mode.
  • the normal wireless charging mode may refer to a wireless charging mode in which the transmitting power of the transmitting device 20 of the wireless charging signal is relatively small (usually less than 15W, and the commonly used transmitting power is 5W or 10W). In the normal wireless charging mode, you want to fully charge it. A large-capacity battery (such as a 3000 mAh battery) usually takes several hours; and in the fast wireless charging mode, the transmission power of the wireless charging signal transmitter 20 is relatively large (usually greater than or equal to 15W ).
  • the wireless charging signal transmitting device 20 in the fast wireless charging mode requires a charging time to fully charge a battery of the same capacity can be significantly shortened and the charging speed is faster.
  • the device to be charged 30 further includes: a second charging channel 38.
  • the second charging channel 38 may be a wire.
  • the second charging channel 38 may be provided with a conversion circuit 37 for voltage control of the direct current output by the wireless receiving circuit 31 to obtain the output voltage and output current of the second charging channel 38 to charge the battery 33.
  • the conversion circuit 37 can be used in a step-down circuit, and outputs constant current and/or constant voltage electric energy. In other words, the conversion circuit 37 can be used to perform constant voltage and/or constant current control on the battery charging process.
  • the wireless transmitting circuit 21 can use a constant transmitting power to transmit an electromagnetic signal. After the wireless receiving circuit 31 receives the electromagnetic signal, it is processed by the conversion circuit 37 into a voltage sum that meets the charging requirements of the battery 33. The current is also input to the battery 33 to charge the battery 33. It should be understood that, in some embodiments, the constant transmission power does not necessarily mean that the transmission power remains completely unchanged, and it can vary within a certain range, for example, the transmission power is 7.5W and fluctuates 0.5W.
  • the charging method for charging the battery 33 through the first charging channel 36 is the first wireless charging mode
  • the charging method for charging the battery 33 through the second charging channel 38 is called the second wireless charging mode.
  • the wireless charging signal transmitter and the device to be charged can determine whether to use the first wireless charging mode or the second wireless charging mode to charge the battery 33 through handshake communication.
  • the maximum transmitting power of the wireless transmitting circuit 21 when the device to be charged is charged in the first wireless charging mode, the maximum transmitting power of the wireless transmitting circuit 21 may be the first transmitting power value.
  • the maximum transmission power of the wireless transmission circuit 21 may be the second transmission power value.
  • the first transmission power value is greater than the second transmission power value, and thus, the charging speed of the device to be charged in the first wireless charging mode is greater than the second wireless charging mode.
  • the second communication control circuit 35 can also be used to control the switching between the first charging channel 36 and the second charging channel 38.
  • a switch 39 can be provided on the first charging channel 36, and the second communication control circuit 35 can control the first charging channel 36 and the second charging channel 38 by controlling the on and off of the switch 39. Switch between.
  • the wireless charging signal transmitting device 20 may include a first wireless charging mode and a second wireless charging mode, and the wireless charging signal transmitting device 20 is to be charged in the first wireless charging mode.
  • the charging speed of 30 is faster than that of the wireless charging signal transmitting device 20 in the second wireless charging mode.
  • the second communication control circuit 35 can switch between the first charging channel 36 and the second charging channel 38 according to the charging mode.
  • the second communication control circuit 35 controls the voltage conversion circuit 32 on the first charging channel 36 to work.
  • the second communication control circuit 35 controls the conversion circuit 37 on the second charging channel 38 to work.
  • the wireless charging signal transmitting device 20 may communicate with the device to be charged 30 to negotiate a charging mode between the wireless charging signal transmitting device 20 and the device to be charged 30.
  • the first communication control circuit 22 in the wireless charging signal transmitting device 20 and the second communication control circuit 35 in the device to be charged 30 can also exchange many other communication information.
  • the first communication control circuit 22 and the second communication control circuit 35 can exchange information for safety protection, anomaly detection or fault handling, such as the temperature information of the battery 33, enter the overvoltage protection or overcurrent Information such as protection indication information, power transmission efficiency information (the power transmission efficiency information can be used to indicate the power transmission efficiency between the wireless transmitting circuit 21 and the wireless receiving circuit 31).
  • the communication between the second communication control circuit 35 and the first communication control circuit 22 may be one-way communication or two-way communication, which is not specifically limited in the embodiment of the present application.
  • the function of the second communication control circuit can be implemented by the application processor of the device to be charged 30, thereby saving hardware costs.
  • it can also be implemented by an independent control chip, which can improve the reliability of control.
  • the embodiment of the present application may integrate the wireless receiving circuit 33 and the voltage conversion circuit 37 in the same wireless charging chip, which can improve the integration of the device to be charged and simplify the implementation of the device to be charged.
  • the functions of traditional wireless charging chips can be expanded to support charging management functions.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a Digital Video Disc (DVD)), or a semiconductor medium (for example, a Solid State Disk (SSD)), etc. .
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un procédé de charge sans fil (300) et un dispositif à charger (600) comprenant : dans le processus de l'état de charge sans fil d'une batterie (630) étant réglé d'un premier mode de charge à un second mode de charge, un circuit de commande de communication (640) ordonnant à un appareil de transmission sans fil d'augmenter la puissance de transmission pour amener la tension délivrée par un circuit de réception sans fil (610) à augmenter ; lorsque la tension délivrée par le circuit de réception sans fil (610) à un circuit de gestion de charge (620) atteint un premier seuil de tension, le circuit de commande de communication (640) ordonne à l'appareil de transmission sans fil d'augmenter la puissance de transmission pour amener le courant délivré par le circuit de gestion de charge (620) à augmenter ; un circuit de détection (650) détecte le courant de sortie du circuit de réception sans fil (610) ; lorsque le courant de sortie du circuit de réception sans fil (610) est supérieur à un premier seuil de courant, le circuit de commande de communication (640) augmente la tension de sortie du circuit de réception sans fil (610) de telle sorte que le courant de sortie du circuit de réception sans fil (610) est inférieur ou égal au premier seuil de courant.
PCT/CN2020/100568 2019-07-30 2020-07-07 Procédé de charge sans fil et dispositif à charger WO2021017770A1 (fr)

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CN201910693649.9A CN112332501B (zh) 2019-07-30 2019-07-30 无线充电方法和待充电设备

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CN117040059B (zh) * 2023-08-09 2024-06-04 深圳市雅为智能技术有限公司 基于智能手表的无线充电方法及装置

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