WO2020124582A1 - 接收装置和无线充电方法 - Google Patents

接收装置和无线充电方法 Download PDF

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Publication number
WO2020124582A1
WO2020124582A1 PCT/CN2018/122780 CN2018122780W WO2020124582A1 WO 2020124582 A1 WO2020124582 A1 WO 2020124582A1 CN 2018122780 W CN2018122780 W CN 2018122780W WO 2020124582 A1 WO2020124582 A1 WO 2020124582A1
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WO
WIPO (PCT)
Prior art keywords
wireless charging
wireless
voltage
circuit
charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/122780
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English (en)
French (fr)
Inventor
万世铭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to PCT/CN2018/122780 priority Critical patent/WO2020124582A1/zh
Priority to CN201880098953.2A priority patent/CN112956109A/zh
Priority to EP18943955.7A priority patent/EP3869665A4/en
Publication of WO2020124582A1 publication Critical patent/WO2020124582A1/zh
Priority to US17/325,138 priority patent/US20210281099A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries for charging batteries from AC mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
    • H02J7/42—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data with electronic devices having internal batteries, e.g. mobile phones
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/933—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data

Definitions

  • the present application relates to the field of wireless charging, and more specifically, to a receiving device and a wireless charging method.
  • the equipment to be charged mainly uses wired charging for charging.
  • the charging methods of mobile phones are still mainly wired charging methods.
  • the mobile phone when it is necessary to charge the mobile phone, the mobile phone can be connected to the power supply device through a charging cable (such as a universal serial bus (USB) cable), and the power supply device can be connected through the charging cable
  • a charging cable such as a universal serial bus (USB) cable
  • USB universal serial bus
  • the wired charging method requires the use of a charging cable, resulting in cumbersome operations in the charging preparation stage. Therefore, the wireless charging method is more and more popular. However, the traditional wireless charging method is ineffective and needs to be improved.
  • the present application provides a receiving device and a wireless charging method, which can improve the charging effect of the wireless charging method.
  • a transmitting device including: a wireless transmitting circuit for transmitting a wireless charging signal; a communication control circuit for receiving a first feedback signal from a receiving device and adjusting the wireless according to the first feedback signal
  • the magnitude of the voltage and/or current corresponding to the transmission power of the charging signal, and the first feedback signal is the feedback signal corresponding to the output current of the wireless receiving circuit.
  • a wireless charging method including: transmitting a wireless charging signal; receiving a first feedback signal from a receiving device; and adjusting the voltage and/or current corresponding to the transmission power of the wireless charging signal according to the first feedback signal
  • the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit.
  • the technical solution provided by the present application can adaptively adjust the transmission power of the wireless charging signal according to the output current of the wireless receiving circuit, so that the output current of the wireless receiving circuit can be controlled to achieve the purpose of controlling the calorific value of the wireless receiving circuit.
  • Figure 1 is a schematic diagram of a wireless charging system.
  • FIG. 2 is a schematic structural diagram of a wireless charging system provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a wireless charging system provided by another embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a wireless charging system provided by yet another embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a wireless charging system provided by another embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a device to be charged according to another embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a wireless charging method provided by an embodiment of the present application.
  • Traditional wireless charging technology generally connects the power supply device (such as an adapter) to a wireless charging device (such as a wireless charging base), and transmits the output power of the power supply device to the standby device in a wireless manner (such as electromagnetic waves) through the wireless charging device Charging equipment, to wirelessly charge the equipment to be charged.
  • a wireless charging device such as a wireless charging base
  • wireless charging methods are mainly divided into three methods: magnetic coupling (or electromagnetic induction), magnetic resonance, and radio waves.
  • the mainstream wireless charging standards include the QI standard, the Power Matters Alliance (PMA) standard, and the Wireless Power Alliance (alliance for wireless power, A4WP). 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 110, a wireless charging device 120, and a device to be charged 130, wherein the wireless charging device 120 may be, for example, a wireless charging base, and the device to be charged 130 may be, for example, a terminal.
  • the wireless charging device 120 may be, for example, a wireless charging base
  • the device to be charged 130 may be, for example, a terminal.
  • the output voltage and output current of the power supply device 110 are transmitted to the wireless charging device 120.
  • the wireless charging device 120 can convert the output voltage and output current of the power supply device 110 into a wireless charging signal (electromagnetic signal) through an internal wireless transmission circuit 121 for transmission.
  • the wireless transmitting circuit 121 may 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.
  • FIG. 1 is merely an exemplary structural diagram of a wireless charging system, but the embodiments of the present application are not limited thereto.
  • the wireless charging device 120 may also be a wireless charging signal transmitting device, and the device to be charged 130 may also be 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, and may receive the wireless charging signal transmitted by the wireless charging device 120; the wireless charging signal receiving device may also be a device to be charged.
  • Devices to be charged include, but are not limited to, being configured 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 And/or another data connection/network) and/or digital TV via (eg, for cellular networks, wireless local area networks (WLAN), WLAN), such as digital video broadcasting (DVB-H) networks
  • a wired line such as via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, direct cable connection, and And/or another data connection/network
  • digital TV via eg, for cellular networks, wireless local area networks (WLAN), WLAN), such as digital video broadcasting (DVB-H) networks
  • Terminals configured to communicate through a wireless interface may be referred to as “wireless
  • mobile terminals include, but are not limited to, satellites or cellular phones; personal radiocommunication system (PCS) terminals that can combine cellular radiotelephones with data processing, fax, and data communication capabilities; can include radiotelephones, pagers, and Internet/ Personal digital assistant (personal digital assistant (PDA)) for intranet access, web browser, notepad, calendar, and/or global positioning system (GPS) receiver; and regular laptop and/or palmtop Receiver or other electronic device including a radio telephone transceiver.
  • the device to be charged may refer to that the mobile terminal is a device or a handheld terminal device, such as a mobile phone or a pad.
  • the device to be charged mentioned in the embodiment 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 following uses a wireless charging device and a device to be charged as an example for description.
  • the device to be charged 130 may receive the wireless charging signal transmitted by the wireless transmitting circuit 121 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 wireless charging signal transmitted by the wireless transmitting circuit 121 into alternating current through a receiving coil or a receiving antenna, and rectify and/or filter the alternating current to convert the alternating current into the wireless receiving circuit 131 Output voltage and output current.
  • the wireless charging device 120 and the device to be charged 130 will pre-negotiate the transmission power of the wireless transmission circuit 121. Assuming that the power negotiated between the wireless charging device 120 and the device to be charged 130 is 5W, the output voltage and output current of the wireless receiving circuit 131 are generally 5V and 1A. Assuming that the power that the wireless charging device 120 can negotiate with the device to be charged 130 is 10.8W, the output voltage and output current of the wireless receiving circuit 131 are generally 9V and 1.2A.
  • the output voltage of the wireless receiving circuit 131 is not suitable to be directly loaded across the battery 133, it is necessary to first perform constant voltage and/or constant current control through the conversion circuit 132 in the device to be charged 130 to obtain the device 130 to be charged The expected charging voltage and/or charging current of the battery 133.
  • the conversion circuit 132 may be used to convert the output voltage of the wireless receiving circuit 131 so that the output voltage and/or output current of the conversion circuit 132 meets the charging voltage and/or charging current requirements of the battery 133.
  • the conversion circuit 132 may be, for example, a charging integrated circuit (IC) or a power management circuit. During the charging process of the battery 133, the conversion circuit 132 may be used to manage the charging voltage and/or charging current of the battery 133.
  • the conversion circuit 132 may include a voltage feedback function and/or a current feedback function to manage the charging voltage and/or charging current of the battery 133.
  • the battery charging process may include one or more of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage.
  • the conversion circuit 132 may use a current feedback function to make the current entering the battery 133 in the trickle charging stage satisfy the expected charging current magnitude of the battery 133 (such as the first charging current).
  • the conversion circuit 132 can use the current feedback function to make the current entering the battery 133 during the constant current charging stage satisfy the expected charging current of the battery 133 (such as the second charging current, which can be greater than the first charging current recharging current).
  • the conversion circuit 132 may use the voltage feedback function to make the voltage applied to the battery 133 in the constant voltage charging stage satisfy the expected charging voltage of the battery 133.
  • the conversion circuit 132 may be used to step-down the output voltage of the wireless receiving circuit 131, so that the charging obtained after the step-down conversion The voltage meets the expected charging voltage requirement of the battery 133.
  • the conversion circuit 132 may be used to boost the output voltage of the wireless receiving circuit 131, so that the boosted The charging voltage meets the expected charging voltage requirement of the battery 133.
  • the conversion circuit 132 may step down the output voltage of the wireless receiving circuit 131, In order to make the charging voltage obtained after the voltage reduction meet the expected charging voltage demand of the battery 133.
  • the conversion circuit 132 (for example, Boost boost circuit) can The output voltage of is boosted, so that the boosted charging voltage meets the expected charging voltage demand of the battery 133.
  • the conversion circuit 132 is limited by the reason for the low power conversion efficiency (also referred to as energy conversion efficiency, or circuit conversion efficiency), so that the electrical energy of the unconverted portion is lost in the form of heat. This part of the heat will be focused inside the device 130 to be charged.
  • the design space and heat dissipation space of the device to be charged 130 are very small (for example, the physical size of the mobile terminal used by the user is getting lighter and thinner, and a large number of electronic components are densely arranged in the mobile terminal to improve the performance of the mobile terminal), which This not only increases the difficulty of designing the conversion circuit 132, but also makes it difficult to remove the heat focused in the device to be charged 130 in time, thereby causing an abnormality of the device to be charged 130.
  • the heat accumulated on the conversion circuit 132 may cause thermal interference to the electronic components in the vicinity of the conversion circuit 132, causing abnormal operation of the electronic components.
  • the heat accumulated on the conversion circuit 132 may shorten the service life of the conversion circuit 132 and nearby electronic components.
  • the heat accumulated on the conversion circuit 132 may cause thermal interference to the battery 133, which may cause abnormal charging and discharging of the battery 133.
  • the heat accumulated on the conversion circuit 132 may cause the temperature of the device to be charged 130 to increase, which may affect the user's experience during charging.
  • the heat accumulated on the conversion circuit 132 may cause a short circuit of the conversion circuit 132 itself, so that the output voltage of the wireless receiving circuit 131 is directly loaded across the battery 133 to cause abnormal charging, if the battery 133 is in overvoltage charging for a long time The state may even cause the battery 133 to explode, endangering the safety of the user.
  • Using a high-voltage-based wireless signal transmission method will inevitably result in a large voltage difference between the input voltage and the output voltage of the conversion circuit 132. Therefore, in order to reduce the voltage difference between the input voltage and the output voltage of the conversion circuit, more and more devices to be charged use low voltage and large current to charge the battery, but the larger charging current will cause the wireless receiving circuit 131 to gather A lot of heat.
  • the wireless charging device 120 may output the charging power in a low-voltage and large-current manner, for example, using a charging power of 5V/4A.
  • the wireless receiving circuit 131 can convert the wireless charging signal into an output voltage/output current of 5V/4A, and a large current will cause the transmitting coil of the wireless transmitting circuit 121 and the receiving coil of the wireless receiving circuit 131 to be generated during power transmission Larger heat. The heat generated during charging will affect the charging speed, product life, and also reduce product reliability.
  • a method of low charging power is used.
  • the wireless charging device 120 only outputs charging power of up to 7.5 W to charge the charging device 130.
  • the charging speed is slow, and it takes a long time to fully charge the device 130 to be charged.
  • the wireless charging device 120 increases the charging power (for example, the charging power is increased from 7.5W to 10W) for wireless charging compared to the low charging power method.
  • this charging method does not reduce the charging duration to the expected (for example, less than 100 minutes).
  • heat of the coil or heat of the conversion circuit 130 is inevitably caused.
  • the distance between the wireless charging device 120 and the device to be charged 130 is usually very small, and the heat-generating coil of the wireless charging device 120 will transfer heat to the device to be charged 130.
  • the heat of the coil and the conversion circuit will be transferred to the battery to a certain extent, and the battery's own heat during the charging process will make the temperature of the battery easily exceed the safe charging range.
  • some related technologies also use heat dissipation technologies such as graphene and heat dissipation plates to dissipate heat during charging.
  • heat dissipation technologies such as graphene and heat dissipation plates to dissipate heat during charging.
  • the effect of these heat dissipation technologies is not ideal, and it will increase the cost of the product, occupy the internal space of the product, and affect the appearance of the product.
  • the wireless charging system may include a wireless charging signal transmitting device (for example, the aforementioned wireless charging device) and a wireless charging signal receiving device (for example, the aforementioned device to be charged).
  • the wireless charging signal transmitting device and the wireless charging signal receiving device can perform wireless communication, and the transmission power of the wireless charging signal transmitting device can be adjusted based on the feedback information sent by the wireless charging signal receiving device, so that the wireless charging signal is transmitted
  • the transmission power of the device matches the current charging voltage and/or charging current required by the battery. Therefore, the wireless charging power and the charging speed can be increased according to the charging demand of the wireless charging signal receiving device.
  • the wireless charging signal receiving device can also feedback the output current of the wireless receiving circuit, so that the wireless charging signal transmitting device can be based on the feedback information of the output current of the wireless receiving circuit To adjust the transmit power so that the output current of the wireless receiving circuit meets the preset conditions.
  • the output current of the wireless receiving circuit is controlled by the transmitting device of the wireless charging signal, so that the heating of the wireless transmitting circuit (which includes the transmitting coil) and the wireless receiving circuit (which includes the receiving coil) can be controlled to reduce the heating during the charging process. Therefore, compared with the related art, the duration of high-power wireless charging can be extended, the charging speed can be increased, and the charging time can be shortened.
  • the wireless charging system provided by the embodiment of the present application will be described below with reference to FIG. 2, which can control the heat generation during the charging process by controlling the output current of the wireless receiving circuit.
  • the wireless charging system includes a wireless charging signal transmitting device 220 and a wireless charging signal receiving device 230.
  • the wireless charging signal transmitting device 220 may include a wireless transmitting circuit 221 and a first communication control circuit 222.
  • the control function in the first communication control circuit 222 can be realized by, for example, a micro control unit (MCU).
  • the wireless charging signal receiving device 230 may include a wireless receiving circuit 231 and a second communication control circuit 235.
  • the wireless receiving circuit 231 may be used to receive the wireless charging signal transmitted by the wireless transmitting circuit 221 to charge the battery.
  • the second communication control circuit 235 may be used to communicate with the first communication control circuit 222, so that the first communication control circuit 222 adjusts the output power of the wireless charging signal.
  • the wireless charging signal transmitting device may also be simply referred to as a transmitting device
  • the wireless charging signal receiving device may also be simply referred to as a receiving device.
  • the wireless transmitting circuit 221 may be used to transmit a wireless charging signal to charge the device to be charged.
  • the wireless transmission circuit 221 may include a wireless transmission driving circuit and a transmission coil or a transmission antenna.
  • the wireless transmission driving circuit can be used to generate higher frequency alternating current, and the transmitting coil or the transmitting antenna can be used to convert the higher frequency alternating current into an electromagnetic signal and transmit it.
  • the first communication control circuit 222 may have a communication function, and may be used to perform wireless communication with the wireless charging signal receiving device 230 during the wireless charging. More specifically, the first communication control circuit 222 may communicate with the second communication control circuit 235 Communicate.
  • the wireless charging signal receiving device 230 may be a device to be charged, or may be a chip with a wireless charging signal receiving function.
  • the embodiment of the present application does not specifically limit the communication method between the first communication control circuit 222 and the wireless charging signal receiving device 230, and the communication information exchanged between the first communication control circuit 222 and the wireless charging signal receiving device 230. Detailed description will be made in conjunction with specific embodiments.
  • the second communication control circuit 235 may communicate with the first communication control circuit 222 according to the output current of the wireless receiving circuit 231, and send the first feedback signal to the first communication control circuit 222.
  • the wireless charging signal receiving device may further include a detection circuit, which may be used to detect the output current of the wireless charging signal.
  • the first communication control circuit 222 may also have a power adjustment function, which can adjust the transmission power of the wireless charging signal.
  • the first communication control circuit 222 may be used to receive the first feedback signal from the wireless charging signal receiving device 230 and adjust the transmission power of the wireless charging signal according to the first feedback signal.
  • the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit.
  • the first communication control circuit 222 adjusts the transmission power of the wireless charging signal according to the first feedback signal, which may refer to adjusting the magnitude of the voltage and/or current corresponding to the transmission power of the wireless charging signal according to the first feedback signal.
  • the magnitude of the voltage and/or current corresponding to the transmission power of the wireless charging signal can be understood as the magnitude of the output voltage and/or output current converted by the wireless receiving circuit after the wireless charging signal transmitted by the wireless transmitting circuit is received by the wireless receiving circuit .
  • Adjusting the transmission power of the wireless charging signal may be adjusting the relationship between the voltage and current corresponding to the transmission power of the wireless charging signal when the transmission power of the wireless charging signal is constant. For example, when the transmission power is constant, the current can be reduced by increasing the voltage.
  • the wireless charging signal transmitted by the wireless transmitting circuit 221 may be received by the wireless receiving circuit 231, and the wireless receiving circuit 231 may convert the received wireless charging signal into the output voltage and output current of the wireless receiving circuit 231.
  • the magnitude of the output current in the wireless transmitting circuit 221 and the wireless receiving circuit 231 is a key factor affecting the heat generation during the wireless charging process.
  • the first communication control circuit 222 may adjust the transmission power of the wireless charging signal according to the feedback signal corresponding to the received output current of the wireless receiving circuit, so that the output current of the wireless receiving circuit meets a preset condition. Therefore, compared with the related art, the heating of the receiving coil in the wireless receiving circuit can be controlled, and the heating during the charging process can be reduced.
  • the embodiment of the present application does not specifically limit the communication method between the first communication control circuit 222 in the wireless charging signal transmitting device 220 and the second communication control circuit 235 in the wireless charging signal receiving device 230.
  • the first communication control circuit 222 and the second communication control circuit 235 may use Bluetooth communication, wireless fidelity (Wi-Fi) communication, or backscatter Modulation (or power load modulation) communication, short-range wireless communication based on high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communication, or mobile communication perform wireless communication.
  • Wi-Fi wireless fidelity
  • backscatter Modulation or power load modulation
  • the short-range wireless communication module based on a high carrier frequency may include an integrated circuit (IC) chip in which an extremely high frequency (EHF) antenna is packaged.
  • the high carrier frequency may be 60 GHz.
  • the optical communication may be an optical communication module.
  • the optical communication module may include an infrared communication module, and the infrared communication module may transmit information using infrared rays.
  • the mobile communication may use a mobile communication module for communication.
  • the mobile communication module can utilize 5G communication protocol, 4G communication protocol or 3G communication protocol to perform information transmission.
  • Using the above wireless communication method compared with the Qi standard, which is coupled to the coil of the wireless receiving circuit by signal modulation to communicate, can improve the reliability of communication and can avoid the voltage ripple caused by signal coupling communication Wave, affecting the voltage processing of the buck circuit.
  • the first communication control circuit 222 and the second communication control circuit 235 may also use the wired communication method of the data interface for communication.
  • the second communication control circuit may communicate with the first communication control circuit 222 according to the detected output current of the wireless receiving circuit, so that the first communication control circuit 222 adjusts the wireless charging signal The transmit power.
  • the embodiment of the present application does not specifically limit the communication content of the second communication control circuit 235 and the first communication control circuit 222. In other words, the embodiment of the present application does not limit the specific content of the first feedback signal.
  • the first feedback signal may include the magnitude of the output current of the wireless receiving circuit 231, and/or include the difference between the output current of the wireless receiving circuit 231 and the target value.
  • the target value may be a target maximum value, that is, a preset maximum value of the output current of the wireless receiving circuit 231. When the output current of the wireless receiving circuit 231 exceeds the target value, it indicates that the wireless receiving circuit 231 may generate more heat.
  • the first communication control circuit 222 After receiving the magnitude of the output current of the wireless receiving circuit 231, the first communication control circuit 222 can adjust the transmission power of the wireless charging signal according to the magnitude of the output current of the wireless receiving circuit 231.
  • the first communication control circuit 222 may increase the output voltage of the wireless transmitting circuit 221 to reduce the output of the wireless transmitting circuit 221 Current.
  • the first communication control circuit 222 After receiving the difference between the output current of the wireless receiving circuit 231 and the target value, the first communication control circuit 222 can adjust the transmission power of the wireless charging signal according to the difference.
  • the first communication control circuit 222 may increase the output voltage of the wireless transmitting circuit. If the first feedback signal indicates that the output current of the wireless receiving circuit is lower than the target value, the first communication control circuit 222 may not adjust the output power of the wireless transmitting circuit.
  • the first feedback signal may indicate the difference between the output current of the wireless receiving circuit 231 and the target value.
  • the first communication control circuit 222 may perform a wide range of transmission power of the wireless charging signal Adjustment; when the difference is small, the first communication control circuit 222 can adjust the transmission power of the wireless charging signal within a small range.
  • the wireless charging signal transmitting device 220 may set multiple gears of the transmission power for the wireless transmitting circuit.
  • the first communication control circuit 222 may change The transmission power of the wireless transmission circuit 221 is adjusted by multiple divisions, and the voltage of each division can be set to a fixed value, for example, 10mW, 20mW, etc.; when the difference between the output current of the wireless reception circuit 231 and the target value is small.
  • the first communication control circuit 222 can adjust the transmission power of the wireless transmission circuit by one grid.
  • the first communication control circuit 222 may increase the output voltage of the wireless transmitting circuit 221 by a large amount.
  • the transmission power of the circuit 221 is adjusted by two divisions; when the first feedback signal indicates that the output current of the wireless receiving circuit 231 is higher than the target value of 0.5A, the first communication control circuit 222 can compare the output voltage of the wireless transmitting circuit 221 For a small increase, for example, the transmission power of the wireless transmission circuit 221 can be adjusted by one grid.
  • the first feedback signal may also include adjustment information to instruct the wireless transmission circuit to increase or decrease the transmission power.
  • the first feedback signal may instruct the first communication control circuit 222 to increase the transmission power of the wireless transmission circuit 221; for another example, the first feedback signal may instruct the first communication control circuit 222 to decrease the transmission power of the wireless transmission circuit 221.
  • the wireless charging signal transmitting device 220 may set multiple transmission power positions for the wireless transmission circuit 221, and each time the first communication control circuit 222 receives the adjustment information, the transmission power of the wireless transmission circuit 221 The gear is adjusted by one grid until the output current of the wireless receiving circuit 231 meets the preset condition.
  • the first communication control circuit does not require multiple feedbacks and confirmations, and the transmission power of the wireless transmission circuit can be adjusted to the required power through one feedback , Which can save loop response time.
  • a wireless charging signal receiving device (such as a device to be charged) can detect the output current of the wireless receiving circuit, and when the output current of the wireless receiving circuit exceeds a preset range, the device to be charged can notify the wireless charging
  • a signal transmitting device (such as a wireless charging base) instructs the wireless charging base to adjust the transmission power of the wireless transmitting circuit so that the output current of the wireless receiving circuit meets the requirements and controls the heating of the wireless receiving circuit. Therefore, compared with the related art, it is possible to extend the duration of high-power (for example, 15W) wireless charging, increase the charging speed, and shorten the charging time.
  • the first feedback signal may also include any combination of the various situations described above.
  • the first feedback signal may include the magnitude of the output current of the wireless receiving circuit 231 and the difference between the magnitude of the output current of the wireless receiving circuit 231 and the target value.
  • the first feedback signal may include the difference between the magnitude of the output current of the wireless receiving circuit 231 and the target value, and adjustment information that increases or decreases the transmission power of the wireless transmitting circuit 221.
  • the first feedback signal described above may also include information about the output voltage of the wireless receiving circuit 231.
  • the embodiment of the present application does not specifically limit the manner in which the first communication control circuit 222 adjusts the transmission power of the wireless charging signal.
  • the first communication control circuit 222 may adjust the transmission power of the wireless charging signal by adjusting the transmission frequency of the wireless charging signal.
  • the first communication control circuit 222 may increase the output voltage of the wireless receiving circuit 231 by increasing the transmission frequency of the wireless charging signal, thereby reducing the output current of the wireless receiving circuit .
  • the output voltage of the wireless reception circuit 231 can be increased to some extent by increasing the transmission frequency of the wireless charging signal, so that the output current of the wireless reception circuit 231 can be reduced.
  • the first communication control circuit 222 may also adjust the transmission power of the wireless charging signal by adjusting the input voltage and/or input current of the wireless transmission circuit 221.
  • the first communication control circuit 222 can increase the output voltage of the wireless receiving circuit 231 by increasing the input voltage of the wireless transmitting circuit 221, thereby reducing the Output current.
  • the output voltage and the output current of the wireless reception circuit 231 have a certain inverse proportional relationship.
  • the output voltage of the wireless reception circuit 231 increases, the output of the wireless reception circuit 231 The current will decrease.
  • the wireless charging signal transmitting device 220 may further include a voltage conversion circuit, wherein the input terminal of the voltage conversion circuit is electrically connected to the output terminal of the power supply device, and the output terminal of the voltage conversion circuit is electrically connected to the input terminal of the wireless transmission circuit Connected, the voltage conversion circuit can be used to adjust the output voltage and/or output current of the power supply device to obtain the output voltage of the voltage conversion circuit. In other words, the voltage conversion circuit can step up or step down the output voltage of the power supply device to obtain the output voltage of the conversion circuit.
  • Adjusting the transmission power of the wireless charging signal by adjusting the input voltage and/or input current of the wireless transmission circuit may refer to adjusting the transmission power of the wireless charging signal by adjusting the output voltage of the voltage conversion circuit.
  • FIG. 3 is an example of the adjustment method of the transmission power of the wireless transmission circuit.
  • the wireless charging signal transmitting device 220 may further include a charging interface 223, and the charging interface 223 may be used to connect with an external power supply device 210.
  • the wireless transmitting circuit 221 can also be used to generate a wireless charging signal according to the output voltage and output current of the power supply device 210.
  • the first communication control circuit 222 may also adjust the amount of power extracted by the wireless transmission circuit 221 from the output power of the power supply device 210 during wireless charging to adjust the transmission power of the wireless transmission circuit 221.
  • the power supply device 210 can also directly output a large fixed power (such as 40 W), and the first communication control circuit 222 can directly adjust the amount of power extracted by the wireless transmission circuit 221 from the fixed power provided by the power supply device 210.
  • the output power of the power supply device 210 may be fixed.
  • the power supply device 210 may directly output a large fixed power (such as 40 W), and the power supply device 210 may provide the output voltage and output current to the wireless charging device 220 according to the fixed output power.
  • the first communication control circuit 222 may extract a certain amount of power from the fixed power of the power supply device for wireless charging according to actual needs.
  • the control right of the transmission power adjustment of the wireless transmission circuit 221 is allocated to the first communication control circuit 222, and the first communication control circuit 222 can receive the feedback signal sent by the second communication control circuit 235 Immediately adjusting the transmission power of the wireless transmission circuit 221 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 222 extracts power from the maximum output power provided by the power supply device 210.
  • a voltage conversion circuit 224 may be provided inside the transmission device 220 of the wireless charging signal, and the voltage conversion circuit 224 may be connected to the transmission coil or the transmission antenna to adjust the power received by the transmission coil or the transmission antenna.
  • the voltage conversion circuit 224 may include, for example, a pulse width modulation (PWM) controller and a switching unit.
  • PWM pulse width modulation
  • the first communication control circuit 222 may adjust the duty cycle of the control signal issued by the PWM controller, and/or adjust the transmission power of the wireless transmission circuit 221 by controlling the switching frequency of the switching unit.
  • the function of the voltage conversion circuit 224 described above may also be implemented by the first communication control circuit 222.
  • the power supply device 210 may be an adapter, a power bank, a car charger, or a computer.
  • the charging interface 223 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 223 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 222 and the power supply device 210.
  • the first communication control circuit 222 may be connected to the power supply device 210 through a communication interface other than the charging interface, and communicate with the power supply device 210 through the communication interface.
  • the first communication control circuit 222 may communicate with the power supply device 210 in a wireless manner.
  • the first communication control circuit 222 may perform near field communication (NFC) with the power supply device 210.
  • NFC near field communication
  • the first communication control circuit 222 can communicate with the power supply device 210 through the charging interface 223 without the need to provide an additional communication interface or other wireless communication modules, which can simplify the implementation of the wireless charging device 220.
  • the charging interface 223 is a USB interface, and the first communication control circuit 222 may communicate with the power supply device 210 based on the data lines (such as D+ and/or D- lines) in the USB interface.
  • the charging interface 223 may be a USB interface (such as a USB Type-C interface) that supports a power delivery (PD) communication protocol, and the first communication control circuit 222 and the power supply device 210 may communicate based on the PD communication protocol.
  • PD power delivery
  • the embodiment of the present application does not specifically limit the manner in which the first communication control circuit 222 adjusts the transmission power of the wireless charging signal.
  • the first communication control circuit 222 may adjust the transmission power of the wireless charging signal by adjusting the frequency of the wireless charging signal, or the first communication control circuit 222 may adjust the input voltage and/or input current of the wireless transmission circuit 221 The transmission power of the wireless charging signal, or alternatively, the first communication control circuit 222 may simultaneously adjust the transmission frequency of the wireless charging signal, and the input voltage and/or input current of the wireless transmission circuit 221 to adjust the transmission power of the wireless charging signal.
  • the first communication control circuit 222 may adjust the transmission power of the wireless charging signal by adjusting the transmission frequency of the wireless charging signal. For another example, when the difference between the output current of the wireless receiving circuit 231 and the target value is large, the first communication control circuit 222 may first adjust the transmission power of the wireless charging signal by adjusting the input voltage of the wireless transmitting circuit 221, Then, by adjusting the transmission frequency of the wireless charging signal, the transmission power of the wireless charging signal is finely adjusted. For another example, the first communication control circuit 222 may first adjust the transmission power of the wireless charging signal by adjusting the transmission frequency of the wireless charging signal.
  • the first communication control circuit 222 may adjust the transmission power of the wireless charging signal by adjusting the input voltage and/or input current of the wireless transmission circuit 221.
  • the wireless charging signal receiving device 230 further includes a first charging channel 233 through which the output voltage and/or output current of the wireless receiving circuit 231 can be provided to the battery 232 To charge the battery 232.
  • a voltage conversion circuit 239 may also be provided on the first charging channel 233, and the input terminal of the voltage conversion circuit 239 is electrically connected to the output terminal of the wireless receiving circuit 231 for stepping down the output voltage of the wireless receiving circuit 231 Process to charge the battery 232.
  • the voltage conversion circuit 239 may be a Buck circuit, a Boost circuit, a charge pump, or a charge management circuit.
  • the charge pump since the charge pump is composed of multiple switching devices, the heat generated by the current flowing through the switching device is very small, almost equivalent to the current directly passing through the wire, so the use of the charge pump as the voltage conversion circuit 239 can not only reduce Pressure effect, and low fever.
  • the voltage conversion circuit 239 may also be a half-voltage circuit.
  • the voltage conversion circuit 239 may be used to step down the output voltage of the wireless receiving circuit 231 and/or adjust the output current, so that the output voltage and/or output current of the voltage conversion circuit 239 and the charging voltage currently required by the battery Match with the charging current.
  • the conversion efficiency of the voltage conversion circuit 239 is limited by the voltage difference between the input terminal and the output terminal of the voltage conversion circuit 239. If the voltage difference across the voltage conversion circuit 239 is too large, it will cause the voltage conversion circuit 239 The conversion efficiency is too low, resulting in the loss of electrical energy in the unconverted part in the form of heat, making the voltage conversion circuit 239 generate more heat.
  • the voltage at the input terminal of the voltage conversion circuit 239 cannot be excessively large, that is, the output voltage of the wireless receiving circuit 231 cannot be excessively large, and the output current of the wireless receiving circuit 231 cannot be excessively small.
  • the embodiment of the present application may also set a target minimum value of the output current of the wireless receiving circuit 231.
  • the output voltage of the wireless receiving circuit 231 is too large, the voltage difference between the input terminal and the output terminal of the voltage conversion circuit 239 will be greater. The greater the voltage difference across the voltage conversion circuit 239, the lower the buck conversion efficiency and the more severe the heat generation.
  • setting the target minimum value of the output current of the wireless receiving circuit 231 can improve the conversion efficiency of the voltage conversion circuit 239 and further control the heat generation during the wireless charging process.
  • the second communication control circuit 235 may send a first feedback signal to the first communication control circuit 222 to instruct the first communication control circuit 222 to adjust the transmission power of the wireless charging signal so that the output current of the wireless receiving circuit 231 Within the preset interval.
  • the preset interval may be an interval composed of the target maximum value and the target minimum value of the output current of the wireless receiving circuit 231.
  • the first communication control circuit 222 may increase the output current of the wireless receiving circuit 231 by reducing the output voltage of the wireless transmitting circuit 221.
  • the first communication control circuit 222 may reduce the output voltage of the wireless receiving circuit 231 by reducing the transmission frequency of the wireless charging signal.
  • the first communication control circuit 222 may reduce the output voltage of the wireless receiving circuit 231 by reducing the input voltage of the wireless transmitting circuit 221.
  • the first communication control circuit 222 may also reduce the transmission frequency of the wireless charging signal and the input voltage of the wireless transmission circuit 221 to reduce the output voltage of the wireless reception circuit.
  • the specific adjustment method is similar to the adjustment method described above. For the sake of concise description, it will not be repeated here.
  • reducing the input voltage of the wireless transmission circuit 221 may also refer to reducing the output voltage of the voltage conversion circuit 224.
  • the minimum value of the output current of the wireless receiving circuit 231 is set to ensure that the voltage difference across the voltage conversion circuit 239 is not too large, which affects the voltage conversion efficiency. Therefore, in this embodiment of the present application, the first target maximum value of the voltage difference between the two ends of the voltage conversion circuit 239 may also be set.
  • the first communication control circuit 222 may adjust the voltage difference between the input terminal and the output terminal of the voltage conversion circuit 239. The transmission power of the wireless charging signal is adjusted.
  • the first feedback signal may also include differential pressure information, which may be the differential pressure value between the input terminal and the output terminal of the voltage conversion circuit 239, or it may be the maximum value of the differential pressure from the first target The difference between the values.
  • the wireless charging signal receiving device 230 may collect the pressure difference information and send a first feedback signal to the first communication control circuit 222 based on the pressure difference information. After receiving the first feedback signal, the first communication control circuit 222 can adjust the transmission power of the wireless charging signal according to the pressure difference information.
  • the first communication control circuit 222 may adjust by reducing the transmission frequency of the wireless charging signal and/or reducing the input voltage of the wireless transmission circuit 221.
  • the embodiment of the present application does not specifically limit the manner in which the second communication control circuit 235 sends the first feedback signal to the first communication control circuit 222.
  • the second communication control circuit 235 may periodically send the first feedback signal to the first communication control circuit 222.
  • the second communication control circuit 235 may only send the first feedback signal to the first communication control circuit 222 after the output current of the wireless receiving circuit does not satisfy the preset condition, if the output current of the wireless receiving circuit 231 meets the preset condition The second communication control circuit 235 may not send the first feedback signal to the first communication control circuit 222.
  • the wireless charging signal receiving device may further include a detection circuit that can detect the charging information of the battery and send a second feedback signal to the first communication control circuit 222, where the second feedback signal may be The feedback signal corresponding to the charging information.
  • the battery charging information includes at least one of the following information: charging voltage, charging current, current power, and current voltage.
  • the first communication control circuit 222 may adjust the transmission power of the wireless charging signal according to the second feedback signal.
  • the charging voltage and charging current of the battery may also refer to the output voltage and output current on the first charging channel.
  • the detection circuit for detecting the output current of the wireless receiving circuit and the detection circuit for detecting the charging information of the battery are the same detection circuit. In another embodiment, the detection circuit for detecting the output current of the wireless receiving circuit and the detection circuit for detecting the charging information of the battery are different detection circuits, and the output of the wireless receiving circuit can be separately detected by two detection circuits Current and battery charging information.
  • the battery voltage will continue to rise, and the charging power required by the battery will also increase.
  • the transmission 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 continues to decrease, and the charging power required by the battery will also decrease.
  • the transmission power of the wireless charging signal needs to be reduced to meet the current charging requirements of the battery.
  • the first feedback signal may be used to trigger the first communication control circuit 222 to adjust the transmission power of the wireless charging signal so that the transmission power of the wireless charging signal matches the currently required charging voltage and/or charging current of the battery.
  • the first communication control circuit 222 may adjust the transmission power of the wireless charging signal according to the second feedback signal, which may refer to the first communication control circuit 222 adjusting the transmission power of the wireless charging signal so that the transmission power of the wireless charging signal is the The charging voltage and/or charging current match.
  • Matching the transmission power of the wireless transmission circuit 221 with the current charging voltage and/or charging current required by the battery 232 may refer to: the first communication control circuit 222 configures the transmission power of the wireless charging signal such that the output voltage of the first charging channel 233 And/or the output current matches the charging voltage and/or charging current currently required by the battery 232 (or, the first communication control circuit 222 configures the transmission power of the wireless charging signal such that the output voltage of the first charging channel 233 and/or Or the output current satisfies the charging requirements of the battery 232 (including the battery 232's charging voltage and/or charging current requirements).
  • the output voltage and/or output current of the first charging channel 232 matches the charging voltage and/or charging current currently required by the battery 232” includes: the first charging channel 232
  • 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 232 or within a preset floating range (for example, the voltage value floats 100 mV to 200 mV up and down, current value Up and down 0.001A ⁇ 0.005A, etc.).
  • the charging process of the battery may include at least one of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage.
  • the above-mentioned second communication control circuit 235 performs wireless communication with the first communication control circuit 222 according to the voltage and/or current on the first charging channel 233 detected by the detection circuit, so that the first communication control circuit 222 according to the first charging channel 233 Adjusting the transmission power of the wireless transmission circuit 221 may include: during the trickle charging phase of the battery 232, the second communication control circuit 235 according to the detected voltage and/or current on the first charging channel 233 , Perform wireless communication with the first communication control circuit 222, so that the first communication control circuit 222 adjusts the transmission power of the wireless transmission circuit 221 so that the output current of the first charging channel 233 matches the charging current corresponding to the trickle charging stage (or , So that the output current of the first charging channel 233 meets the demand of the charging current of the battery 232 during the trickle charging stage).
  • the embodiment of the present application does not specifically limit the content of the second feedback signal.
  • the second feedback signal may include charging information of the battery.
  • the first communication control circuit 222 may determine the current charging stage of the battery 232 according to the current power and/or current voltage of the battery 232, and then determine a target charge that matches the current required charging voltage and/or charging current of the battery 232 Voltage and/or target charging current; then, the first communication control circuit 222 may also compare the output voltage and/or output current of the first charging channel 233 with the above target charging voltage and/or target charging current to determine the first Does the output voltage and/or output current of the charging channel 233 match the current charging voltage and/or charging current required by the battery 232, and the output voltage and/or output current of the first charging channel 233 matches the current demand of the battery 232 If the charging voltage and/or charging current do not match, adjust the transmission power of the wireless transmitting circuit 221 until the output voltage and/or output current of the first charging channel 233 and the current charging voltage and/or charging current required by the battery 232 Match.
  • the second communication control circuit 235 may send adjustment information to the first communication control circuit 222 to instruct the first communication control circuit 222 to adjust the transmission power of the wireless transmission circuit 221.
  • the second communication control circuit 235 may instruct the first communication control circuit 222 to increase the transmission power of the wireless transmission circuit 221; for another example, the second communication control circuit 235 may instruct the first communication control circuit 222 to decrease the transmission power of the wireless transmission circuit 221 Transmit power.
  • the wireless charging signal transmitting device 220 may set multiple transmission power positions for the wireless transmission circuit 221, and each time the first communication control circuit 222 receives the adjustment information, the transmission power of the wireless transmission circuit 221 The gear is adjusted by one grid until the output voltage and/or output current of the first charging channel 233 matches the current charging voltage and/or charging current required by the battery 232.
  • FIG. 5 is another example of the adjustment method of the transmission power of the wireless transmission circuit 221.
  • the wireless charging signal transmitting device 220 corresponding to the embodiment of FIG. 5 does not obtain power from the power supply device 210, but directly converts externally inputted alternating current (such as commercial power) into the above-mentioned wireless charging signal.
  • the wireless charging signal transmitting device 220 may further include a voltage conversion circuit 224 and a power supply circuit 225.
  • the power supply circuit 225 may be used to receive external input AC power (such as commercial power) and generate the output voltage and output current of the power supply circuit 225 according to the AC power.
  • the power supply circuit 225 may 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 224.
  • the voltage conversion circuit 224 can be used to receive the output voltage of the power supply circuit 225 and convert the output voltage of the power supply circuit 225 to obtain the output voltage and output current of the voltage conversion circuit 224.
  • the wireless transmission circuit 221 can also be used to generate a wireless charging signal according to the output voltage and output current of the voltage conversion circuit 224.
  • the embodiment of the present application integrates an adapter-like function inside the wireless charging signal transmitting device 220, so that the wireless charging signal transmitting device 220 does not need to obtain power from an external power supply device, which improves the integration of the wireless charging signal transmitting device 220 Degree, and reduces the number of devices needed to implement the wireless charging process.
  • the embodiment of the present application uses high voltage and low current for energy transmission.
  • This energy transmission method requires a high input voltage (such as 10V or 20V) of the wireless transmission circuit 221. If the maximum output voltage of the power supply circuit 225 cannot reach the wireless transmission The input voltage requirement of the circuit 221 and the setting of the voltage conversion circuit 224 can make it impossible to reach the input voltage of the wireless transmission circuit 221 to the desired input voltage.
  • the voltage conversion circuit 224 can also be omitted to simplify the implementation of the wireless charging signal transmission device 220.
  • the embodiments of the present application may set different output current ranges of the wireless receiving circuit for different charging stages. For example, for the trickle charging stage, the charging current required by the device to be charged is smaller, and a smaller output current range can be set; for the constant current charging stage, the charging current required by the device to be charged is larger, and a larger charging can be set Current range.
  • the wireless charging signal transmitting device 220 can adjust the output power of the wireless transmitting circuit 221 in various ways.
  • the adjustment method may include any one of the following three methods and a combination of several types:
  • the output power of the wireless transmission circuit 221 can be adjusted by adjusting the tuning frequency of the resonance circuit and/or the duty ratio of the switching tube of the inverter circuit. Adjustment.
  • the output power of the wireless transmitting circuit 221 is adjusted.
  • the wireless charging signal transmitting device 220 may support the first wireless charging mode and the second wireless charging mode, and the wireless charging signal transmitting device 220 charges the device to be charged in the first wireless charging mode The speed is faster than the charging speed of the wireless charging signal transmitting device 220 in the second wireless charging mode.
  • the wireless charging signal transmitting device 220 operating in the first wireless charging mode is full of devices of the same capacity to be charged Of batteries consume less time.
  • the second wireless charging mode may be referred to as an ordinary wireless charging mode, for example, it may be a traditional wireless charging mode based on the QI standard, PMA standard, or A4WP standard.
  • the first wireless charging mode may be a fast wireless charging mode.
  • the ordinary wireless charging mode may refer to a wireless charging mode in which the transmission power of the wireless charging signal transmitting device 220 is small (usually less than 15W, and the commonly used transmission power is 5W or 10W). In the ordinary wireless charging mode, you want to fully charge Large-capacity batteries (such as batteries with a capacity of 3000 mAh) usually take several hours; while in the fast wireless charging mode, the transmission power of the wireless charging signal transmitter 220 is relatively large (usually greater than or equal to 15W ). Compared with the ordinary wireless charging mode, the wireless charging signal transmitting device 220 can significantly shorten the charging time and charge the battery faster in the fast wireless charging mode to fully charge the battery of the same capacity.
  • the wireless charging signal receiving device 230 further includes: a second charging channel 236.
  • the second charging channel 236 may be a wire.
  • a conversion circuit 237 may be provided on the second charging channel 236 to perform voltage control on the DC power output by the wireless receiving circuit 231 to obtain the output voltage and output current of the second charging channel 236 to charge the battery 232.
  • the conversion circuit 237 can be used as a step-down circuit and output constant-current and/or constant-voltage electrical energy. In other words, the conversion circuit 237 can be used for constant voltage and/or constant current control of the battery charging process.
  • the wireless transmitting circuit 221 may use a constant transmission power to transmit the electromagnetic signal. After the wireless receiving circuit 231 receives the electromagnetic signal, the conversion circuit 237 processes the voltage and The current is input to the battery 232 to charge the battery 232. It should be understood that, in some embodiments, the constant transmit power does not necessarily mean that the transmit power remains completely unchanged, and it can be varied within a certain range, for example, the transmit power is 7.5W and 0.5W floats up and down.
  • the detection circuit 234 is also used to perform detection based on the detected output voltage value of the rectifier circuit in the wireless receiving circuit and the set target value (for example, the maximum voltage value that the set rectifier circuit needs to output) Compare, determine the error value, and then send the error value to the wireless charging signal transmitter 220 in the form of a data packet.
  • the set target value for example, the maximum voltage value that the set rectifier circuit needs to output
  • the wireless charging signal transmitting device and the device to be charged can be wirelessly charged according to the Qi standard.
  • the data signal containing the above-mentioned error value can be coupled to the coil of the wireless receiving circuit 231 by signal modulation to be sent to the coil of the wireless transmitting circuit 221, and then transmitted to the first communication control circuit.
  • the first communication control circuit adjusts the transmission parameters of the wireless transmission circuit 221 according to the information of the error data packet, for example, the operating frequency of the transmission coil.
  • the charging method for charging the battery 232 through the first charging channel 233 is the first wireless charging mode
  • the method for charging the battery 232 through the second charging channel 236 is called the second wireless charging mode.
  • the wireless charging signal transmitting device and the device to be charged may determine whether to charge the battery 232 in the first wireless charging mode or the second wireless charging mode through handshake communication.
  • the maximum transmission power of the wireless transmission circuit 221 may be the first transmission power value.
  • the maximum transmission power of the wireless transmission circuit 221 may be the second transmission power value.
  • the first transmission power value is greater than the second transmission power value, and therefore, 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 235 can also be used to control the switching between the first charging channel 233 and the second charging channel 236.
  • a switch 238 may be provided on the first charging channel 233, and the second communication control circuit 235 may control the first charging channel 233 and the second charging channel 236 by controlling the switch 238 to be turned on and off Switching between.
  • the wireless charging signal transmitting device 220 may include a first wireless charging mode and a second wireless charging mode, and the wireless charging signal transmitting device 220 may charge the device to be charged in the first wireless charging mode The charging speed of 230 is faster than the charging speed of the wireless charging signal transmitting device 220 in the second wireless charging mode.
  • the charging device 230 can control the first charging channel 233 to work; when the wireless charging signal transmitting device 220 uses the second wireless When the charging mode is to charge the battery in the device to be charged 230, the device to be charged 230 may control the second charging channel 236 to work.
  • the charging method described in FIGS. 1-3 may be used for wireless charging.
  • the second communication control circuit 235 can switch between the first charging channel 233 and the second charging channel 236 according to the charging mode.
  • the second communication control circuit 235 controls the voltage conversion circuit 239 on the first charging channel 233 to work.
  • the second communication control circuit 235 controls the conversion circuit 237 on the second charging channel 236 to operate.
  • the wireless charging signal transmitting device 220 may communicate with the wireless charging signal receiving device 230 to negotiate a charging mode between the wireless charging signal transmitting device 220 and the wireless charging signal receiving device 230.
  • the first communication control circuit 222 in the wireless charging signal transmitting device 220 and the second communication control circuit 235 in the wireless charging signal receiving device 230 can also exchange many other communication information.
  • the first communication control circuit 222 and the second communication control circuit 235 can exchange information for safety protection, abnormality detection or fault handling, such as the temperature information of the battery 232, into overvoltage protection or overcurrent Information such as protection indication information and power transmission efficiency information (the power transmission efficiency information can be used to indicate the power transmission efficiency between the wireless transmission circuit 221 and the wireless reception circuit 231).
  • the communication between the second communication control circuit 235 and the first communication control circuit 222 may be unidirectional communication or bidirectional communication, which is not specifically limited in this embodiment of the present application.
  • the function of the second communication control circuit may be implemented by the application processor of the wireless charging signal receiving device 230, and thus, hardware cost may be saved. Alternatively, it can also be realized by an independent control chip, which can improve the reliability of control.
  • the embodiments of the present application may integrate the wireless receiving circuit 232 and the voltage conversion circuit 239 in the same wireless charging chip, which may 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 wireless transmitting circuit generates an electromagnetic signal based on 10V/2A
  • the wireless receiving circuit converts the electromagnetic signal into an output voltage/output current of 10V/2A. Since the current is reduced from 4A to 2A, the heat generated during the power transmission process Will be reduced accordingly. Therefore, the embodiments of the present application may also use multiple cells connected in series to reduce the heat generated by the wireless transmitting circuit 221 and the wireless receiving circuit 231.
  • N 2 as an example.
  • the value of N may be 3 or a positive integer of 3 or more.
  • the more cells connected in series the smaller the amount of heat generated by the electrical energy passing through the wireless transmitting circuit 221 and the wireless receiving circuit 231.
  • the embodiment of the present application in order to ensure the charging speed and further alleviate the heating phenomenon of the wireless charging signal receiving device 230, the embodiment of the present application further reforms the battery structure inside the wireless charging signal receiving device 230, Multi-cell batteries connected in series are introduced.
  • the charging current required by the multi-cell batteries is 1/N( N is the number of cells connected in series in the wireless charging signal receiving device 230), in other words, under the premise of ensuring the same charging speed, the embodiment of the present invention can greatly reduce the size of the charging current, thereby further reducing wireless charging
  • the signal receiving device 230 generates heat during the charging process.
  • the multi-cell batteries in an embodiment of the present application may be batteries with the same or similar specifications and parameters.
  • the batteries with the same or similar specifications are convenient for unified management, and selecting batteries with the same specifications or similar parameters can increase the number of cells.
  • the electrical energy output by the first charging channel or the second charging channel can be used to charge the multi-cell batteries connected in series with each other.
  • a step-down circuit may be used to step down the voltage of the multi-cell batteries to perform system power supply to the wireless charging signal receiving device 230, or a single-cell battery may also be used for system power supply.
  • the system if the system needs to be powered, it can be divided into a path directly through the charging management circuit to supply power to the system.
  • the multi-cell batteries can be balanced by the equalizing circuit.
  • the equalization circuit There are many ways to implement the equalization circuit. For example, you can connect loads at both ends of the cell and consume the power of the cell to keep it consistent with the power of other cells, thereby keeping the voltage of each cell consistent.
  • a battery with a high power can be used to charge a battery with a low power for equalization until the voltage of each cell is the same.
  • the charging process of the battery may include one or more of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage.
  • a trickle charging stage in order to further increase the charging speed, by controlling the charging voltage and the charging current, the charging duration of the constant voltage charging phase is shortened or the constant voltage charging phase is eliminated. Therefore, compared with the charging process in the related art, the charging speed can be greatly improved.
  • a limit voltage Vn higher than the standard cut-off voltage of the battery is set, and a plurality of charging currents [I1, I2, I3, ..., In] are set, n ⁇ 1.
  • the limit voltage Vn is related to the battery system, the materials used, and the like.
  • Vn may be set to V0+ ⁇ V, for example, ⁇ V may take a value between 0.05V and 0.1V.
  • the values of the charging currents I1, I2, ..., In are also related to the battery system and the materials used. For example, In may be 700 mA.
  • the battery capacity is determined. According to the relationship between charging voltage, charging current, charging time and battery capacity, when the charging voltage is equal to the limit voltage Vn, the magnitude of the charging current at different stages can be determined.
  • I1, I2, I3...In can be set, and the difference between the two adjacent charging currents is ⁇ I, for example, ⁇ I can take a value between 100mA and 1A.
  • the battery when the battery voltage is charged to the standard cut-off voltage, the battery is charged with a constant current at the charging current I1 until the battery voltage reaches the limit voltage Vn. Since the battery is charged with a constant current at current I1, the voltage will drop after stopping. Therefore, the battery can be charged with a constant current at a current I2 until the battery voltage reaches the limit voltage Vn. Repeat the above steps until the charging current In is used to charge to the limit voltage Vn in the last step, then the charging can be stopped. Therefore, by setting the limit voltage Vn and the charging current in each stage, the constant voltage charging stage in the related art can be omitted, and the charging time is greatly saved.
  • the battery When the battery voltage is charged to the standard cut-off voltage, the battery is charged through multiple charging stages, each of which corresponds to a charging current, and the charging current corresponding to the previous charging stage adjacent to the charging stage is greater than the latter
  • the charging current corresponding to the charging stage, each of the charging stages uses its corresponding charging current to charge the battery voltage to a limit voltage, the limit voltage is greater than the standard cut-off voltage of the battery; when multiple charging stages When finished, stop charging.
  • the battery when the battery voltage is charged to the standard cut-off voltage, the battery is charged with a constant current at the charging current I1 until the battery voltage reaches the limit Voltage Vn. The battery is then charged with a constant current of current I2 until the battery voltage reaches the limit voltage Vn.
  • Vn is used as the charging voltage, and the constant voltage charging is preset for a predetermined time or the current to be charged is reduced to a preset value (for example, 100mA), then stop Charge.
  • the charging cut-off voltage can be increased and the duration of constant-voltage charging can be reduced, compared with the related art, the charging time can also be greatly saved.
  • the battery When the battery voltage is charged to the standard cut-off voltage, the battery is charged through multiple charging stages, each of which corresponds to a charging current, and the charging current corresponding to the previous charging stage adjacent to the charging stage is greater than the latter
  • the charging current corresponding to the charging stage, each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, the limit voltage is greater than the standard cut-off voltage of the battery;
  • the battery performs constant voltage charging until the charging current of the battery reaches the target constant voltage charging cut-off current or the charging duration reaches a preset duration, then charging stops.
  • each battery cell can independently perform the charging operation according to the above charging process.
  • the device embodiments of the present application are described in detail above with reference to FIGS. 2-6, and the method embodiments of the present application are described in detail below with reference to FIG. 7.
  • the method embodiments and the device embodiments correspond to each other, so parts not described in detail may be See previous device embodiments.
  • FIG. 7 is a schematic flowchart of a wireless charging method provided by an embodiment of the present application.
  • the method can be applied to a wireless charging signal transmission device, for example, the wireless charging signal transmission device 220 described above.
  • the method of FIG. 7 includes steps S710-S730.
  • S730 may include adjusting the transmission frequency of the wireless charging signal according to the first feedback signal according to the current feedback information.
  • S730 may include adjusting the input voltage and/or input current of the wireless transmission circuit according to the first feedback signal.
  • the method of FIG. 7 may further include: adjusting the output voltage and/or output current of the power supply device to obtain the output voltage of the voltage conversion circuit; and adjusting the wireless charging signal according to the first feedback signal
  • the transmit power of includes: adjusting the output voltage of the voltage conversion circuit according to the first feedback signal.
  • the first feedback signal includes adjustment information, and the adjustment information is used to indicate adjustment of the magnitude of the voltage and/or current corresponding to the transmission power of the wireless charging signal.
  • the method of FIG. 7 may further include: receiving a second feedback signal from the receiving device, and adjusting the transmission power of the wireless charging signal according to the second feedback signal, where the second feedback signal is A feedback signal corresponding to the charging information of the battery.
  • the charging information of the battery includes at least one of the following information: charging voltage, charging current, current power, and current voltage.
  • the adjusting the transmission power of the wireless charging signal according to the second feedback signal includes adjusting the transmission frequency of the wireless charging signal according to the second feedback signal.
  • the adjusting the transmission power of the wireless charging signal according to the second feedback signal includes adjusting the input voltage and/or input current of the wireless transmission circuit according to the second feedback signal.
  • the method of FIG. 7 may further include: adjusting the output voltage and/or output current of the power supply device to obtain the output voltage of the voltage conversion circuit, and adjusting the wireless charging signal according to the second feedback signal
  • the transmit power of includes: adjusting the output voltage of the voltage conversion circuit according to the second feedback signal.
  • the second feedback signal includes adjustment information, and the adjustment information is used to instruct to adjust the transmission power of the wireless charging signal.
  • the wireless charging method is applied to a transmitting device, and the transmitting device supports a first wireless charging mode and a second wireless charging mode, wherein the transmitting device treats the receiving device in the first wireless charging mode
  • the charging speed of is faster than the charging speed of the transmitting device to the receiving device in the second wireless charging mode.
  • the wireless charging method further includes: communicating with the receiving device to negotiate to use the first wireless charging mode or the second wireless charging mode for wireless charging.
  • the wireless charging method further includes: performing handshake communication with the receiving device; when the handshake communication is successful, controlling the transmitting device to use the first wireless charging mode for the receiving device Charge.
  • the wireless charging method further includes: performing handshake communication with the receiving device; if the handshake communication fails, controlling the transmitting device to use the second wireless charging mode for the receiving device Charge.
  • the first feedback signal and the second feedback signal are transmitted in at least one of the following modes: Bluetooth, wireless fidelity, backscatter modulation, and high-frequency carrier close-range wireless communication , Optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.
  • the high carrier frequency is 60 GHz.
  • the optical communication is based on infrared communication.
  • the mobile communication communicates based on at least one of the following communication protocols: 5G communication protocol, 4G communication protocol, and 3G communication protocol.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated 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 from a website site, computer, server or data center Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, digital video disc (DVD)), or semiconductor media (eg, solid state disk (SSD)), etc. .
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • 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 may be combined or 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 may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional 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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Abstract

提供一种发射装置和无线充电方法。发射装置包括无线发射电路，用于发射无线充电信号；通信控制电路，用于从接收装置接收第一反馈信号，并根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，所述第一反馈信号为无线接收电路的输出电流对应的反馈信号。上述技术方案可以根据无线接收电路的输出电流对应的反馈，调整无线发射电路的输出功率，从而能够控制无线接收电路的输出电流，进一步控制无线接收电路的发热量。

Description

接收装置和无线充电方法 技术领域
本申请涉及无线充电领域，更为具体地，涉及一种接收装置和无线充电方法。
背景技术
目前，在充电技术领域，待充电设备主要采用有线充电方式进行充电。
以手机为例，目前，手机的充电方式仍以有线充电方式为主。具体地，当需要为手机充电时，可以通过充电线缆(如通用串行总线(universal serial bus，USB)线缆)将手机与电源提供设备相连，并通过该充电线缆将电源提供设备的输出功率传输至手机，为手机内的电池充电。
对待充电设备而言，有线充电方式需要使用充电线缆，导致充电准备阶段的操作繁琐。因此，无线充电方式越来越受到人们的青睐。但传统的无线充电方式效果较差，亟待改善。
发明内容
本申请提供一种接收装置和无线充电方法，能够改善无线充电方式的充电效果。
第一方面，提供一种发射装置，包括：无线发射电路，用于发射无线充电信号；通信控制电路，用于从接收装置接收第一反馈信号，并根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，所述第一反馈信号为无线接收电路的输出电流对应的反馈信号。
第二方面，提供一种无线充电方法，包括：发射无线充电信号；从接收装置接收第一反馈信号；根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，所述第一反馈信号为无线接收电路的输出电流对应的反馈信号。
本申请提供的技术方案，能够根据无线接收电路的输出电流，适应性地调整无线充电信号的发射功率，从而能够控制无线接收电路的输出电流，达到控制无线接收电路发热量的目的。
附图说明
图1是一种无线充电系统的示意图。
图2是本申请一个实施例提供的无线充电系统的示意性结构图。
图3是本申请另一实施例提供的无线充电系统的示意性结构图。
图4是本申请又一实施例提供的无线充电系统的示意性结构图。
图5是本申请又一实施例提供的无线充电系统的示意性结构图。
图6是本申请又一实施例提供的一种待充电设备的示意性结构图。
图7是本申请实施例提供的无线充电方法的示意性流程图。
具体实施方式
传统的无线充电技术一般将电源提供设备(如适配器)与无线充电装置(如无线充电底座)相连，并通过该无线充电装置将电源提供设备的输出功率以无线的方式(如电磁波)传输至待充电设备，对待充电设备进行无线充电。
按照无线充电原理不同，无线充电方式主要分为磁耦合(或电磁感应)、磁共振以及无线电波三种方式。目前，主流的无线充电标准包括QI标准、电源实物联盟(power matters alliance，PMA)标准、无线电源联盟(alliance for wireless power，A4WP)。QI标准和PMA标准均采用磁耦合方式进行无线充电。A4WP标准采用磁共振方式进行无线充电。
下面结合图1，对一实施例的无线充电方式进行介绍。
如图1所示，无线充电系统包括电源提供设备110、无线充电装置120以及待充电设备130，其中无线充电装置120例如可以是无线充电底座，待充电设备130例如可以是终端。
电源提供设备110与无线充电装置120连接之后，会将电源提供设备110的输出电压和输出电流传输至无线充电装置120。
无线充电装置120可以通过内部的无线发射电路121将电源提供设备110的输出电压和输出电流转换成无线充电信号(电磁信号)进行发射。例如，该无线发射电路121可以将电源提供设备110的输出电流转换成交流电，并通过发射线圈或发射天线将该交流电转换成无线充电信号。
图1只是示例性地给出了无线充电系统的示意性结构图，但本申请实施例并不限于此。例如，无线充电装置120也可以是无线充电信号的发射装置，待充电设备130也可以是无线充电信号的接收装置。无线充电信号的接收装置例如可以是具有无线充电信号接收功能的芯片，可以接收无线充电装置120发射的无线充电信号；该无线充电信号的接收装置也可以是待充电设备。
待充电设备包括但不限于：被设置成经由有线线路连接(如经由公共交换电话网络(public switched telephone network，PSTN)、数字用户线路(digital subscriber line，DSL)、数字电缆、直接电缆连接，以及/或另一数据连接/网络)和/或经由(例如，针对蜂窝网络、无线局域网(wireless local area network，WLAN)、诸如手持数字视频广播(digital video broadcasting handheld，DVB-H)网络的数字电视网络、卫星网络、调幅-调频(amplitude modulation-frequency modulation，AM-FM)广播发送器，以及/或另一通信终端的)无线接口接收/发送通信信号的装置。被设置成通过无线接口通信的终端可以被称为“无线通信终端”、“无线终端”以及/或“移动终端”。移动终端的示例包括，但不限于卫星或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(personal communication system，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(global positioning system,GPS)接收器的个人数字助理(personal digital assistant，PDA)；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。在某些实施例中，待充电设备可指移动终端是设备或手持终端设备，如手机、pad等。在某些实施例中，本申请实施例提及的待充电设备可以是指芯片系统，在该实施例中，待充电设备的电池可以属于或也可以不属于该芯片系统。
下面以无线充电装置、待充电设备为例进行描述。
待充电设备130可以通过无线接收电路131接收无线发射电路121发射的无线充电信号，并将该无线充电信号转换成无线接收电路131的输出电压和输出电流。例如，该无线接收电路131可以通过接收线圈或接收天线将无线发射电路121发射的无线充电信号转换成交流电，并对该交流电进行整流和/或滤波等操作，将该交流电转换成无线接收电路131的输出电压和输出电流。
在一些实施例中，在无线充电之前，无线充电装置120与待充电设备130会预先协商无线发射电路121的发射功率。假设无线充电装置120与待充电设备130之间协商的功率为5W，则无线接收电路131的输出电压和输出电流一般为5V和1A。假设无线充电装置120可与待充电设备130之间协商的功率为10.8W，则无线接收电路131的输出电压和输出电流一般为9V和1.2A。
若无线接收电路131的输出电压并不适合直接加载到电池133两端，则是需要先经过待充电设备130内的变换电路132进行恒压和/或恒流控制，以得到待充电设备130内的电池133所预期的充电电压和/或充电电流。
变换电路132可用于对无线接收电路131的输出电压进行变换，以使得变换电路132 的输出电压和/或输出电流满足电池133所预期的充电电压和/或充电电流的需求。
作为一种示例，该变换电路132例如可以是充电集成电路(integrated circuit，IC)，或者可以为电源管理电路。在电池133的充电过程中，变换电路132可用于对电池133的充电电压和/或充电电流进行管理。该变换电路132可以包含电压反馈功能，和/或，电流反馈功能，以实现对电池133的充电电压和/或充电电流的管理。
在一些实施例中，电池的充电过程可包括涓流充电阶段，恒流充电阶段和恒压充电阶段中的一个或者多个。在涓流充电阶段，变换电路132可利用电流反馈功能使得在涓流充电阶段进入到电池133的电流满足电池133所预期的充电电流大小(譬如第一充电电流)。在恒流充电阶段，变换电路132可利用电流反馈功能使得在恒流充电阶段进入电池133的电流满足电池133所预期的充电电流大小(譬如第二充电电流，该第二充电电流可大于第一充电电流)。在恒压充电阶段，变换电路132可利用电压反馈功能使得在恒压充电阶段加载到电池133两端的电压的大小满足电池133所预期的充电电压大小。
作为一种示例，当无线接收电路131的输出电压大于电池133所预期的充电电压时，变换电路132可用于对无线接收电路131的输出电压进行降压处理，以使降压转换后得到的充电电压满足电池133所预期的充电电压需求。作为又一种示例，当无线接收电路131的输出电压小于电池133所预期的充电电压时，变换电路132可用于对无线接收电路131的输出电压进行升压处理，以使升压转换后得到的充电电压满足电池133所预期的充电电压需求。
作为又一示例，以无线接收电路131输出5V恒定电压为例，当电池133包括单个电芯时，变换电路132(例如Buck降压电路)可对无线接收电路131的输出电压进行降压处理，以使得降压后得到的充电电压满足电池133所预期的充电电压需求。
作为又一示例，以无线接收电路131输出5V恒定电压为例，当电池133包括相互串联的两节或两节以上电芯时，变换电路132(例如Boost升压电路)可对无线接收电路131的输出电压进行升压处理，以使得升压后得到的充电电压满足电池133所预期的充电电压需求。
变换电路132受限于功率转换效率(也可称为能量转换效率，或电路转换效率)低下的原因，致使未被转换部分的电能以热量的形式散失。这部分热量会聚焦在待充电设备130的内部。待充电设备130的设计空间和散热空间都很小(例如，用户使用的移动终端物理尺寸越来越轻薄，同时移动终端内密集排布了大量的电子元器件以提升移动终端的性能)，这不但提升了变换电路132的设计难度，还会导致聚焦在待充电设备130内的热量很难及时移除，进而引发待充电设备130的异常。
例如，变换电路132上聚集的热量可能会对变换电路132附近的电子元器件造成热干扰，引发电子元器件的工作异常。又如，变换电路132上聚集的热量，可能会缩短变换电路132及附近电子元件的使用寿命。又如，变换电路132上聚集的热量，可能会对电池133造成热干扰，进而导致电池133充放电异常。又如变换电路132上聚集的热量，可能会导致待充电设备130的温度升高，影响用户在充电时的使用体验。又如，变换电路132上聚集的热量，可能会导致变换电路132自身的短路，使得无线接收电路131的输出电压直接加载在电池133两端而引起充电异常，如果电池133长时间处于过压充电状态，甚至会引发电池133的爆炸，危及用户安全。
通常来讲，变换电路132的输入电压和输出电压之间的压差越大，其降压转换效率越低，发热越严重。采用基于高压的无线信号传输方式势必会导致变换电路132的输入电压和输出电压之间的压差较大。因此，为了降低变换电路的输入电压和输出电压之间的压差，越来越多的待充电设备采用低压大电流的方式为电池进行充电，但是充电电流较大会导致无线接收电路131处也聚集大量的热量。
以充电功率等于20W为例，为了降低变换电路132的发热，无线充电装置120可采用低压大电流的方式输出充电功率，例如，采用5V/4A的充电功率。相应地，无线接收 电路131可以将无线充电信号转换成5V/4A的输出电压/输出电流，而大电流会导致无线发射电路121的发射线圈和无线接收电路131的接收线圈在电能传输过程中产生较大热量。充电过程中的发热会影响充电速度、产品寿命，以及还会降低产品可靠性。
综上，如何减小无线充电过程中的发热成为亟需解决的问题。
在一些相关技术中，为了减小无线充电过程中线圈的发热，会采用低充电功率的方式，例如，无线充电装置120只输出最高7.5W的充电功率对待充电设备130进行充电。这样的充电方式，充电速度慢，需要花费很长的时间才能将待充电设备130的电量充满。
在另一些相关技术中，相比于低充电功率的方式，为了加快充电速度，无线充电装置120提高充电功率(例如，充电功率从7.5W提高到10W)进行无线充电。但是，这样的充电方式，并没有将充电时长缩小到预期(例如，小于100分钟)。如上所述，当采用高功率进行无线充电时，必然会引起线圈的发热或变换电路130的发热。在采用磁耦合方式进行无线充电的系统中，无线充电装置120和待充电设备130之间的距离，通常是很小的，无线充电装置120的发热的线圈会将热传递给待充电设备130。而对于待充电设备130自身，其线圈和变换电路的发热，在一定程度上会传递给电池，再加上电池在充电过程中自身的发热，会使得电池的温度很容易超过安全充电范围。当线圈的发热、变换电路的发热以及电池的发热超过安全范围时，必须再回到低充电功率(例如，7.5W)或暂停充电的方式，来保证充电的安全。因此，该相关技术中，虽然提高了无线充电的最大充电功率，但是采用最大充电功率充电的时长是很短的，而只是短时间内以较高功率进行无线充电，并不会将充电时长缩短到预期。
此外，为了减少发热，一些相关技术中还采用石墨烯、散热板等散热技术，在充电过程中进行散热。然而，这些散热技术的效果并不理想，而且会增加产品成本，占用产品的内部空间，影响产品美观。
为解决上述问题，本申请实施例提供一种无线充电系统。该无线充电系统可以包括无线充电信号的发射装置(例如，上述无线充电装置)与无线充电信号的接收装置(例如，上述待充电设备)。无线充电信号的发射装置与无线充电信号的接收装置能够进行无线通信，且该无线充电信号的发射装置的发射功率可以基于无线充电信号的接收装置发送的反馈信息进行调节，使得无线充电信号的发射装置的发射功率与电池当前所需的充电电压和/或充电电流相匹配。由此，可根据无线充电信号的接收装置的充电需求，提高无线充电功率，提高充电速度。
其次，为了避免无线接收电路的输出电流过大，无线充电信号的接收装置也可以对无线接收电路的输出电流进行反馈，这样，无线充电信号的发射装置可以基于无线接收电路的输出电流的反馈信息，对发射功率进行调节，使得无线接收电路的输出电流满足预设条件。
通过无线充电信号的发射装置控制无线接收电路的输出电流，从而可以控制无线发射电路(其包括发射线圈)和无线接收电路(其包括接收线圈)的发热，减小充电过程中的发热。由此，相比于相关技术，可以延长高功率无线充电的时长，提高充电速度，并缩短充电时间。下文结合图2描述本申请实施例提供的无线充电系统，能够通过控制无线接收电路的输出电流来控制充电过程中的发热。
如图2所示，本申请实施例提供的无线充电系统包括无线充电信号的发射装置220以及无线充电信号的接收装置230。无线充电信号的发射装置220可包括无线发射电路221和第一通信控制电路222。第一通信控制电路222中的控制功能例如可以通过微控制单元(micro control unit，MCU)实现。无线充电信号的接收装置230可以包括无线接收电路231和第二通信控制电路235。无线接收电路231可用于接收无线发射电路221发射的无线充电信号，以对电池进行充电。第二通信控制电路235可用于与第一通信控制电路222进行通信，以便于第一通信控制电路222对无线充电信号的输出功率进行调整。
可以理解的是，无线充电信号的发射装置也可以简称为发射装置，无线充电信号的 接收装置也可以简称为接收装置。
无线发射电路221可用于发射无线充电信号，以对待充电设备进行充电。在一些实施例中，无线发射电路221可包括无线发射驱动电路和发射线圈或发射天线。无线发射驱动电路可用于生成较高频率的交流电，发射线圈或发射天线可用于将该较高频率的交流电转换成电磁信号发射出去。
第一通信控制电路222可以具有通信功能，可用于在无线充电的过程中与无线充电信号的接收装置230进行无线通信，更为具体地，第一通信控制电路222可以与第二通信控制电路235进行通信。其中，无线充电信号的接收装置230可以是待充电设备，也可以是具有无线充电信号接收功能的芯片。本申请实施例对第一通信控制电路222和无线充电信号的接收装置230之间的通信方式，以及第一通信控制电路222和无线充电信号的接收装置230交互的通信信息不做具体限定，下文会结合具体的实施例进行详细描述。
第二通信控制电路235可以根据无线接收电路231的输出电流，与第一通信控制电路222进行通信，向第一通信控制电路222发送第一反馈信号。可选地，无线充电信号的接收装置还可以包括检测电路，该检测电路可用于对无线充电信号的输出电流进行检测。
第一通信控制电路222还可以具有功率调整功能，能够调整无线充电信号的发射功率。第一通信控制电路222可用于从无线充电信号的接收装置230接收第一反馈信号，并根据第一反馈信号调整无线充电信号的发射功率。其中，第一反馈信号为无线接收电路的输出电流对应的反馈信号。
第一通信控制电路222根据第一反馈信号调整无线充电信号的发射功率，可以指根据第一反馈信号调整无线充电信号的发射功率对应的电压和/或电流的大小。无线充电信号的发射功率对应的电压和/或电流的大小，可以理解为无线发射电路发射的无线充电信号被无线接收电路接收后，被无线接收电路转换后的输出电压和/或输出电流的大小。
调整无线充电信号的发射功率可以是在无线充电信号的发射功率一定的情况下，调整无线充电信号的发射功率对应的电压和电流之间的关系。例如，在发射功率一定的情况下，可以通过增大电压来减小电流。
无线发射电路221发射的无线充电信号可以被无线接收电路231接收到，无线接收电路231可以将接收到的无线充电信号转换成无线接收电路231的输出电压和输出电流。
上文指出，无线发射电路221和无线接收电路231中的输出电流的大小是影响无线充电过程中的发热的关键因素。本申请实施例中，第一通信控制电路222可以根据接收到的无线接收电路的输出电流对应的反馈信号，对无线充电信号的发射功率进行调整，使得无线接收电路的输出电流满足预设条件。由此，相比于相关技术，可控制无线接收电路中接收线圈的发热，降低充电过程的发热。
本申请实施例对无线充电信号的发射装置220中的第一通信控制电路222与无线充电信号的接收装置230中的第二通信控制电路235的通信方式不做具体限定。可选地，在一些实施例中，第一通信控制电路222和第二通信控制电路235可以采用蓝牙(bluetooth)通信、无线保真(wireless fidelity，Wi-Fi)通信或反向散射(backscatter)调制方式(或功率负载调制方式)通信、基于高载波频率的近距离无线通信、光通信、超声波通信、超宽带通信或移动通信等无线通信方式进行通信。
在一实施例中，基于高载波频率的近距离无线通信模块可以包括内部封装有极高频(extremely high frequency，EHF)天线的集成电路(integrated circuit，IC)芯片。可选地，高载波频率可以为60GHz。
在一实施例中，光通信可以是利用光通信模块进行通信。光通信模块可以包括红外通信模块，红外通信模块可利用红外线传输信息。
在一实施例中，移动通信可以是利用移动通信模块进行通信。移动通信模块可利用 5G通信协议、4G通信协议或3G通信协议等移动通信协议进行信息传输。
采用上述的无线通信方式，相比于Qi标准中通过信号调制的方式耦合到无线接收电路的线圈进行通信的方式，可提高通信的可靠性，且可避免采用信号耦合方式通信带来的电压纹波，影响降压电路的电压处理过程。
可选地，第一通信控制电路222和第二通信控制电路235也可以采用数据接口的有线通信方式进行通信。
上文指出，在无线充电的过程中，第二通信控制电路可以根据检测到的无线接收电路的输出电流，与该第一通信控制电路222进行通信，以便第一通信控制电路222调整无线充电信号的发射功率。但是，本申请实施例对第二通信控制电路235与第一通信控制电路222的通信内容不做具体限定。换句话说，本申请实施例对第一反馈信号的具体内容不做限定。
作为一个示例，第一反馈信号可以包括无线接收电路231的输出电流的大小，和/或包括无线接收电路231的输出电流与目标值之间的差异。其中，目标值可以是目标最大值，即预设的无线接收电路231的输出电流的最大值，当无线接收电路231的输出电流超过目标值时，表示无线接收电路231的发热会比较严重。
第一通信控制电路222接收到无线接收电路231的输出电流的大小后，可以根据无线接收电路231的输出电流的大小，调整无线充电信号的发射功率。
例如，当第一反馈信号指示无线接收电路231的输出电流的大小为大于2A的输出电流时，第一通信控制电路222可以增大无线发射电路221的输出电压，以降低无线发射电路221的输出电流。
第一通信控制电路222接收到无线接收电路231的输出电流与目标值之间的差异后，可以根据该差异，调整无线充电信号的发射功率。
例如，如果第一反馈信号指示无线接收电路231的输出电流高于目标值，则第一通信控制电路222可以增大无线发射电路的输出电压。如果第一反馈信号指示无线接收电路的输出电流低于目标值，则第一通信控制电路222可以不调整无线发射电路的输出功率。
又例如，第一反馈信号可以指示无线接收电路231的输出电流与目标值之间的差异大小，当该差异较大时，第一通信控制电路222可以对无线充电信号的发射功率进行大范围的调整；当该差异较小时，第一通信控制电路222可以对无线充电信号的发射功率进行小范围的调整。
例如，无线充电信号的发射装置220可以为无线发射电路设置发射功率的多个档位，当无线接收电路231的输出电流与目标值之间的差异较大时，第一通信控制电路222可以将无线发射电路221的发射功率的档位调整多格，每格档位的电压可设置为固定值，例如，10mW、20mW等；当无线接收电路231的输出电流与目标值之间的差异较小时，第一通信控制电路222可以将无线发射电路的发射功率的档位调整一格。
举例说明，当第一反馈信号指示无线接收电路231的输出电流高于目标值1A时，第一通信控制电路222可以对无线发射电路221的输出电压进行较大的升高，如可以将无线发射电路221的发射功率的档位调整两格；当第一反馈信号指示无线接收电路231的输出电流高于目标值0.5A时，第一通信控制电路222可以对无线发射电路221的输出电压进行较小的升高，如可以将无线发射电路221的发射功率的档位调整一格。
作为又一示例，第一反馈信号也可以包括调整信息，以指示无线发射电路增大或减小发射功率。例如，第一反馈信号可以指示第一通信控制电路222增大无线发射电路221的发射功率；又例如，第一反馈信号可以指示第一通信控制电路222减小无线发射电路221的发射功率。更为具体地，无线充电信号的发射装置220可以为无线发射电路221设置发射功率的多个档位，第一通信控制电路222每接收到一次调整信息，就将无线发射电路221的发射功率的档位调整一格，直到无线接收电路231的输出电流满足预设条 件。
通过调整信息来指示无线发射电路增大或减小发射功率的方式，不需要第一通信控制电路经过多次反馈和确认，可以通过一次反馈就可以将无线发射电路的发射功率调整到需要的功率，从而能够节省环路响应时间。
本申请实施例提供的技术方案，无线充电信号的接收装置(如待充电设备)可以检测无线接收电路的输出电流，当无线接收电路的输出电流超出预设范围时，待充电设备可以通知无线充电信号的发射装置(如无线充电底座)，以指示无线充电底座对无线发射电路的发射功率进行调整，使得无线接收电路的输出电流满足要求，控制无线接收电路的发热。由此，相比于相关技术，可以延长大功率(例如，15W)无线充电的时长，提高充电速度，并缩短充电时间。
可以理解，第一反馈信号也可以包括上文描述的各种情况的任意组合。例如，第一反馈信号可以包括无线接收电路231的输出电流的大小，以及无线接收电路231输出电流的大小与目标值之间的差异。又例如，第一反馈信号可以包括无线接收电路231输出电流的大小与目标值之间的差异，以及增大或减小无线发射电路221的发射功率的调整信息。
可以理解，在无线发射电路221的发射功率一定的情况下，无线接收电路231的输出电压和输出电流存在一定的反比例关系。因此，上文所述的第一反馈信号也可以包括无线接收电路231的输出电压的相关信息。
本申请实施例对第一通信控制电路222调整无线充电信号的发射功率的方式不做具体限定。
作为一个示例，第一通信控制电路222可以通过调整无线充电信号的发射频率来调整无线充电信号的发射功率。当无线接收电路231的输出电流高于目标值时，第一通信控制电路222可以通过增大无线充电信号的发射频率来增大无线接收电路231的输出电压，从而减小无线接收电路的输出电流。
可以理解，在无线发射电路221的输入电压一定的情况下，通过增加无线充电信号的发射频率可以在一定程度上增加无线接收电路231的输出电压，从而能够减小无线接收电路231的输出电流。
作为又一示例，第一通信控制电路222也可以通过调整无线发射电路221的输入电压和/或输入电流来调整无线充电信号的发射功率。当无线接收电路231的输出电流高于目标值时，第一通信控制电路222可以通过增大无线发射电路221的输入电压来增大无线接收电路231的输出电压，从而减小无线接收电路231的输出电流。
可以理解，在无线发射电路221的发射功率一定的情况下，无线接收电路231的输出电压和输出电流存在一定的反比例关系，当无线接收电路231的输出电压增大时，无线接收电路231的输出电流就会减小。
可选地，无线充电信号的发射装置220还可以包括电压变换电路，其中，电压变换电路的输入端与电源提供设备的输出端电连接，电压变换电路的输出端与无线发射电路的输入端电连接，电压变换电路可用于对电源提供设备的输出电压和/或输出电流进行调整，得到电压变换电路的输出电压。换句话说，电压变换电路可以对电源提供设备的输出电压进行升压或降压处理，得到变换电路的输出电压。
通过调整无线发射电路的输入电压和/或输入电流来调整无线充电信号的发射功率，可以指通过调整电压变换电路的输出电压来调整无线充电信号的发射功率。
图3是无线发射电路的发射功率的调整方式的一个示例。请参见图3，无线充电信号的发射装置220还可以包括充电接口223，充电接口223可用于与外部的电源提供设备210相连。无线发射电路221还可用于根据电源提供设备210的输出电压和输出电流，生成无线充电信号。
第一通信控制电路222还可以在无线充电的过程中，调整无线发射电路221从电源 提供设备210的输出功率中抽取的功率量，以调整无线发射电路221的发射功率。例如，电源提供设备210也可以直接输出较大的固定功率(如40W)，第一通信控制电路222可以直接调整无线发射电路221从电源提供设备210提供的固定功率中抽取的功率量。
本申请实施例中，电源提供设备210的输出功率可以是固定的。例如，电源提供设备210可以直接输出较大的固定功率(如40W)，电源提供设备210可以按照该固定的输出功率向无线充电装置220提供输出电压和输出电流。在充电过程中，第一通信控制电路222可以根据实际需要从该电源提供设备的固定功率中抽取一定的功率量用于无线充电。也就是说，本申请实施例将无线发射电路221的发射功率调整的控制权分配给第一通信控制电路222，第一通信控制电路222能够在接收到第二通信控制电路235发送的反馈信号之后立刻对无线发射电路221的发射功率进行调整，具有调节速度快、效率高的优点。
本申请实施例对第一通信控制电路222从电源提供设备210提供的最大输出功率中抽取功率量的方式不做具体限定。例如，可以在无线充电信号的发射装置220内部设置电压转换电路224，该电压转换电路224可以与发射线圈或发射天线相连，用于调整发射线圈或发射天线接收到的功率。该电压转换电路224例如可以包括脉冲宽度调制(pulse width modulation，PWM)控制器和开关单元。第一通信控制电路222可以通过调整PWM控制器发出的控制信号的占空比，和/或通过控制开关单元的开关频率调整无线发射电路221的发射功率。
可选地，上述电压转换电路224的功能也可以通过第一通信控制电路222来实现。
本申请对电源提供设备210的类型不做具体限定。例如，电源提供设备210可以为适配器、移动电源(power bank)、车载充电器或电脑等设备。
本申请对充电接口223的类型不做具体限定。可选地，在一些实施例中，该充电接口223可以为USB接口。该USB接口例如可以是USB 2.0接口，micro USB接口，或USB TYPE-C接口。可选地，在另一些实施例中，该充电接口223还可以是lightning接口，或者其他任意类型的能够用于充电的并口和/或串口。
本申请实施例对第一通信控制电路222与电源提供设备210之间的通信方式不做具体限定。作为一个示例，第一通信控制电路222可以通过除充电接口之外的其他通信接口与电源提供设备210相连，并通过该通信接口与电源提供设备210通信。作为另一个示例，第一通信控制电路222可以以无线的方式与电源提供设备210进行通信。例如，第一通信控制电路222可以与电源提供设备210进行近场通信(near field communication，NFC)。作为又一个示例，第一通信控制电路222可以通过充电接口223与电源提供设备210进行通信，而无需设置额外的通信接口或其他无线通信模块，这样可以简化无线充电装置220的实现。例如，充电接口223为USB接口，第一通信控制电路222可以与电源提供设备210基于该USB接口中的数据线(如D+和/或D-线)进行通信。又如，充电接口223可以为支持功率传输(power delivery，PD)通信协议的USB接口(如USB TYPE-C接口)，第一通信控制电路222与电源提供设备210可以基于PD通信协议进行通信。
可选地，本申请实施例对第一通信控制电路222调整无线充电信号的发射功率的方式不做具体限定。例如，第一通信控制电路222可以采用调整无线充电信号的频率来调整无线充电信号的发射功率，或者，第一通信控制电路222可以采用调整无线发射电路221的输入电压和/或输入电流来调整无线充电信号的发射功率，又或者，第一通信控制电路222可以同时调整无线充电信号的发射频率，以及无线发射电路221的输入电压和/或输入电流来调整无线充电信号的发射功率。
例如，当无线接收电路231的输出电流与目标值的差异较小时，第一通信控制电路222可以通过调整无线充电信号的发射频率来调整无线充电信号的发射功率。又例如，当无线接收电路231的输出电流与目标值之间的差异较大时，第一通信控制电路222可以 先通过调整无线发射电路221的输入电压对无线充电信号的发射功率进行粗调，然后再通过调整无线充电信号的发射频率对无线充电信号的发射功率进行精调。再例如，第一通信控制电路222也可以先通过调整无线充电信号的发射频率对无线充电信号的发射功率进行调整，当通过频率调整后的无线充电信号的发射功率还不能满足无线接收电路231对输出电流的要求，第一通信控制电路222可以再通过调整无线发射电路221的输入电压和/或输入电流对无线充电信号的发射功率进行调整。
可选地，如图4所示，无线充电信号的接收装置230还包括第一充电通道233，通过该第一充电通道233可将无线接收电路231的输出电压和/或输出电流提供给电池232，对电池232进行充电。
可选地，第一充电通道233上还可以设置电压转换电路239，该电压转换电路239的输入端与无线接收电路231的输出端电连接，用于对无线接收电路231的输出电压进行降压处理，以对电池232进行充电。
该电压转换电路239可以为Buck电路、Boost电路、电荷泵或者充电管理电路。
在一个实施例中，由于电荷泵由多个开关器件构成，电流流过开关器件产生的热量很小，几乎与电流直接经过导线相当，所以采用电荷泵作为电压转换电路239，不但可以起到降压效果，而且发热较低。作为一个示例，电压转换电路239还可为半压电路。
可选地，电压转换电路239可用于对无线接收电路231的输出电压进行降压和/或输出电流进行调整，使得电压转换电路239的输出电压和/或输出电流与电池当前所需的充电电压和/或充电电流相匹配。
如上文所述，电压转换电路239的转换效率受限于电压转换电路239的输入端与输出端之间的电压差，如果电压转换电路239两端的电压差过大，则会导致电压转换电路239的转换效率过低，致使未被转换部分的电能以热量的形式散失，使得电压转换电路239的发热较严重。
因此，电压转换电路239的输入端的电压不能过大，即无线接收电路231的输出电压不能过大，无线接收电路231的输出电流不能过小。
本申请实施例还可以设置无线接收电路231输出电流的目标最小值。在充电功率一定的情况下，如果无线接收电路231的输出电流越小，则无线接收电路231的输出电压越大。无线接收电路231的输出电压过大，会导致电压转换电路239的输入端和输出端之间的电压差越大。电压转换电路239两端的电压差越大，其降压转换效率越低，发热越严重。本申请实施例设置无线接收电路231输出电流的目标最小值，能够提高电压转换电路239的转换效率，进一步控制无线充电过程中的发热。
通过设置无线接收电路231的输出电流的目标最大值和目标最小值，不仅可以控制无线发射电路221和无线接收电路231的发热，还可以控制无线接收电路231的输出电压与电池的充电电压之间的压差，提升充电效率。
可选地，第二通信控制电路235可以向第一通信控制电路222发送第一反馈信号，以指示第一通信控制电路222对无线充电信号的发射功率进行调整，使得无线接收电路231的输出电流在预设区间内。其中，预设区间可以是由无线接收电路231的输出电流的目标最大值和目标最小值构成的区间。
当无线接收电路231的输出电流小于目标最小值时，第一通信控制电路222可以通过减小无线发射电路221的输出电压来增大无线接收电路231的输出电流。作为一个示例，第一通信控制电路222可以通过减小无线充电信号的发射频率来减小无线接收电路231的输出电压。作为又一示例，第一通信控制电路222可以通过减小无线发射电路221的输入电压来减小无线接收电路231的输出电压。作为再一示例，第一通信控制电路222也可以同时减小无线充电信号的发射频率，以及减小无线发射电路221的输入电压来减小无线接收电路的输出电压。具体的调节方式与上文描述的调节方式类似，为描述简洁，此处不再赘述。
可选地，减小无线发射电路221的输入电压也可以是指减小电压转换电路224的输出电压。
可以理解，设置无线接收电路231的输出电流的最小值，是为了保证电压转换电路239两端的电压差不至于过大，影响电压转换效率。因此，本申请实施例还可以设置电压转换电路239两端的电压差的第一目标最大值，第一通信控制电路222可以根据电压转换电路239的输入端和输出端之间的压差，来对无线充电信号的发射功率进行调整。
可选地，第一反馈信号也可以包括压差信息，该压差信息可以是电压转换电路239的输入端和输出端之间的压差值，或者也可以是压差之与第一目标最大值之间的差异。无线充电信号的接收装置230可以采集该压差信息，并基于该压差信息，向第一通信控制电路222发送第一反馈信号。第一通信控制电路222接收到该第一反馈信号后，可以根据压差信息调整无线充电信号的发射功率。
例如，当第一反馈信号指示的压差大于第一目标最大值时，第一通信控制电路222可以通过减小无线充电信号的发射频率和/或减小无线发射电路221的输入电压进行调整。
本申请实施例对第二通信控制电路235向第一通信控制电路222发送第一反馈信号的方式不做具体限定。
例如，第二通信控制电路235可以定期向第一通信控制电路222发送第一反馈信号。或者，第二通信控制电路235可以仅在无线接收电路的输出电流不满足预设条件后，再向第一通信控制电路222发送第一反馈信号，如果无线接收电路231的输出电流满足预设条件，第二通信控制电路235可以不向第一通信控制电路222发送第一反馈信号。
可选地，无线充电信号的接收装置还可包括检测电路，该检测电路可以检测电池的充电信息，并向第一通信控制电路222发送第二反馈信号，其中，第二反馈信号可以为电池的充电信息对应的反馈信号，电池的充电信息包括可以以下信息中的至少一种：充电电压、充电电流、当前电量以及当前电压。第一通信控制电路222可以根据第二反馈信号调整无线充电信号的发射功率。
其中，电池的充电电压和充电电流也可以指第一充电通道上的输出电压和输出电流。
在一实施例中，用于检测无线接收电路的输出电流的检测电路与用于检测电池的充电信息的检测电路为同一个检测电路。在另一实施例中，用于检测无线接收电路的输出电流的检测电路与用于检测电池的充电信息的检测电路为不同的检测电路，可以通过两个检测电路来分别检测无线接收电路的输出电流和电池的充电信息。
在一实施例中，对待充电设备而言，在涓流充电的过程中，电池的电压会不断上升，电池所需的充电功率也会随之增大。此时，需要增大无线充电信号的发射功率，以满足电池当前的充电需求。在恒压充电的过程中，电池的充电电流不断减小，电池所需的充电功率也会随之减小。此时，需要减小无线充电信号的发射功率，以满足电池当前的充电需求。
可选地，第一反馈信号可用于触发第一通信控制电路222调整无线充电信号的发射功率，使得无线充电信号的发射功率与电池的当前所需的充电电压和/或充电电流相匹配。
第一通信控制电路222可以根据第二反馈信号调整无线充电信号的发射功率，可以指第一通信控制电路222调整无线充电信号的发射功率，使得无线充电信号的发射功率与电池的当前所需的充电电压和/或充电电流相匹配。
无线发射电路221的发射功率与电池232当前所需的充电电压和/或充电电流相匹配可以指：第一通信控制电路222对无线充电信号的发射功率的配置使得第一充电通道233的输出电压和/或输出电流与电池232当前所需的充电电压和/或充电电流相匹配(或者，第一通信控制电路222对无线充电信号的发射功率的配置使得第一充电通道233的输出电压和/或输出电流满足电池232的充电需求(包括电池232对充电电压和/或充电电流的 需求))。
应理解，在本公开的一实施例中，“第一充电通道232的输出电压和/或输出电流与电池232当前所需的充电电压和/或充电电流相匹配”包括：第一充电通道232输出的直流电的电压值和/或电流值与电池232所需的充电电压值和/或充电电流值相等或在浮动预设范围(例如，电压值上下浮动100毫伏～200毫伏，电流值上下浮动0.001A～0.005A等)。
电池的充电过程可包括涓流充电阶段、恒流充电阶段和恒压充电阶段中的至少一个。
上述第二通信控制电路235根据检测电路检测到的第一充电通道233上的电压和/或电流，与第一通信控制电路222进行无线通信，以便第一通信控制电路222根据第一充电通道233上的电压和/或电流，调整无线发射电路221的发射功率可以包括：在电池232的涓流充电阶段，第二通信控制电路235根据检测到的第一充电通道233上的电压和/或电流，与第一通信控制电路222进行无线通信，以便第一通信控制电路222调整无线发射电路221的发射功率，使得第一充电通道233的输出电流与涓流充电阶段对应的充电电流相匹配(或者，使得第一充电通道233的输出电流满足电池232在涓流充电阶段对充电电流的需求)。
本申请实施例对第二反馈信号的内容不做具体限定。
作为一个示例，第二反馈信号可以包括电池的充电信息。第一通信控制电路222可以根据电池232的当前电量和/或当前电压，确定电池232当前所处的充电阶段，进而确定与电池232当前所需的充电电压和/或充电电流相匹配的目标充电电压和/或目标充电电流；然后，第一通信控制电路222还可以将第一充电通道233的输出电压和/或输出电流与上述目标充电电压和/或目标充电电流相比较，以确定第一充电通道233的输出电压和/或输出电流与电池232当前所需的充电电压和/或充电电流是否匹配，并在第一充电通道233的输出电压和/或输出电流与电池232当前所需的充电电压和/或充电电流不匹配的情况下，调整无线发射电路221的发射功率，直到第一充电通道233的输出电压和/或输出电流与电池232当前所需的充电电压和/或充电电流相匹配。
作为另一示例，第二通信控制电路235可以向第一通信控制电路222发送调整信息，以指示第一通信控制电路222调整无线发射电路221的发射功率。例如，第二通信控制电路235可以指示第一通信控制电路222增大无线发射电路221的发射功率；又如，第二通信控制电路235可以指示第一通信控制电路222减小无线发射电路221的发射功率。更为具体地，无线充电信号的发射装置220可以为无线发射电路221设置发射功率的多个档位，第一通信控制电路222每接收到一次调整信息，就将无线发射电路221的发射功率的档位调整一格，直到第一充电通道233的输出电压和/或输出电流与电池232当前所需的充电电压和/或充电电流相匹配。
图5是无线发射电路221的发射功率的调整方式的另一示例。图5的实施例对应的无线充电信号的发射装置220并非从电源提供设备210获取电能，而是直接将外部输入的交流电(如市电)转换成上述无线充电信号。
如图5所示，无线充电信号的发射装置220还可包括电压转换电路224和电源提供电路225。电源提供电路225可用于接收外部输入的交流电(如市电)，并根据交流电生成电源提供电路225的输出电压和输出电流。例如，电源提供电路225可以对交流电进行整流和/或滤波，得到直流电或脉动直流电，并将该直流电或脉动直流电传输至电压转换电路224。
电压转换电路224可用于接收电源提供电路225的输出电压，并对电源提供电路225的输出电压进行转换，得到电压转换电路224的输出电压和输出电流。无线发射电路221还可用于根据电压转换电路224的输出电压和输出电流，生成无线充电信号。
本申请实施例在无线充电信号的发射装置220内部集成了类似适配器的功能，使得该无线充电信号的发射装置220无需从外部的电源提供设备获取功率，提高了无线充电 信号的发射装置220的集成度，并减少了实现无线充电过程所需的器件的数量。
本申请实施例采用高压低电流的方式进行能量传输，这种能量传输方式对无线发射电路221的输入电压(如10V或20V)要求较高，如果电源提供电路225的最大输出电压无法达到无线发射电路221的输入电压需求，电压转换电路224的设置可以使得无法达到无线发射电路221的输入电压达到期望的输入电压。当然，可替换地，如果电源提供电路225的输出电压可以达到无线发射电路221对输入电压需求，也可以省去电压转换电路224，以简化无线充电信号的发射装置220的实现。
可选地，本申请实施例可以为不同的充电阶段设置不同的无线接收电路的输出电流的范围。例如，对于涓流充电阶段，待充电设备所需的充电电流较小，可以设置较小输出电流范围；对于恒流充电阶段，待充电设备所需的充电电流较大，可以设置较大的充电电流范围。
在本申请的实施例中，无线充电信号的发射装置220调整无线发射电路221的输出功率的方式可有多种。具体的，调整方式可包括以下三种方式中的任一种和几种的组合：
(1)在无线发射电路221的输入电压固定的情况下，可以通过调整谐振电路的调谐频率和/或逆变电路的开关管的占空比等参数，实现对无线发射电路221的输出功率的调整。
(2)调整电压转换电路224的输出电压(即输入无线发射电路221的电压)，由此，实现对无线发射电路221的输出功率的调整。
(3)通过调整电源提供设备210的输出电压(即输入无线充电信号的发射装置的电压)，实现对无线发射电路221的输出功率的调整。
可选地，在一些实施例中，无线充电信号的发射装置220可以支持第一无线充电模式和第二无线充电模式，无线充电信号的发射装置220在第一无线充电模式下对待充电设备的充电速度快于无线充电信号的发射装置220在第二无线充电模式下对待充电设备的充电速度。换句话说，相较于工作在第二无线充电模式下的无线充电信号的发射装置220来说，工作在第一无线充电模式下的无线充电信号的发射装置220充满相同容量的待充电设备中的电池的耗时更短。
第二无线充电模式可为称为普通无线充电模式，例如可以是传统的基于QI标准、PMA标准或A4WP标准的无线充电模式。第一无线充电模式可为快速无线充电模式。该普通无线充电模式可以指无线充电信号的发射装置220的发射功率较小(通常小于15W，常用的发射功率为5W或10W)的无线充电模式，在普通无线充电模式下想要完全充满一较大容量电池(如3000毫安时容量的电池)，通常需要花费数个小时的时间；而在快速无线充电模式下，无线充电信号的发射装置220的发射功率相对较大(通常大于或等于15W)。相较于普通无线充电模式而言，无线充电信号的发射装置220在快速无线充电模式下完全充满相同容量电池所需要的充电时间能够明显缩短、充电速度更快。
参见图6，在本公开的一实施例中，无线充电信号的接收装置230还包括：第二充电通道236。第二充电通道236可为导线。在第二充电通道236上可设置变换电路237，用于对无线接收电路231输出的直流电进行电压控制，得到第二充电通道236的输出电压和输出电流，以对电池232进行充电。
在一个实施例中，变换电路237可用于降压电路，并且输出恒流和/或恒压的电能。换句话说，该变换电路237可用于对电池的充电过程进行恒压和/或恒流控制。
当采用第二充电通道236对电池232进行充电时，无线发射电路221可采用恒定发射功率发射电磁信号，无线接收电路231接收电磁信号后，由变换电路237处理为满足电池232充电需求的电压和电流并输入电池232，实现对电池232的充电。应理解，在一些实施例中，恒定发射功率不一定是发射功率完全保持不变，其可在一定的范围内变动，例如，发射功率为7.5W上下浮动0.5W。
在该实施例中，检测电路234还用于根据检测到的无线接收电路中整流电路的输出 电压值与设定的目标值(例如，可为设定的整流电路需要输出的最大电压值)进行比较，确定误差值，再将误差值通过数据包的形式发送给无线充电信号的发射装置220。
在一实施例中，通过第二充电通道236对电池232进行充电时，无线充电信号的发射装置和待充电设备可按照Qi标准进行无线充电。由此，可通过信号调制的方式，将包含上述误差值的数据信号耦合到无线接收电路231的线圈以发送给无线发射电路221的线圈，再传输给第一通信控制电路。第一通信控制电路根据误差数据包的信息，调整无线发射电路221的发射参数，例如，发射线圈的工作频率等。
在本公开的实施例中，通过第一充电通道233对电池232进行充电的充电方式为第一无线充电模式，通过第二充电通道236对电池232进行充电的方式称为第二无线充电模式。无线充电信号的发射装置和待充电设备可通过握手通信确定采用第一无线充电模式还是第二无线充电模式对电池232进行充电。
本公开实施例中，在无线充电装置侧，当通过第一无线充电模式对待充电设备充电时，无线发射电路221的最大发射功率可为第一发射功率值。而通过第二无线充电模式对待充电设备进行充电时，无线发射电路221的最大发射功率可为第二发射功率值。其中，第一发射功率值大于第二发射功率值，由此，采用第一无线充电模式对待充电设备的充电速度大于第二无线充电模式。
可选地，第二通信控制电路235还可用于控制第一充电通道233和第二充电通道236之间的切换。例如，如图4所示，第一充电通道233上可以设置开关238，第二通信控制电路235可以通过控制该开关238的导通与关断控制第一充电通道233和第二充电通道236之间的切换。上文指出，在某些实施例中，无线充电信号的发射装置220可以包括第一无线充电模式和第二无线充电模式，且无线充电信号的发射装置220在第一无线充电模式下对待充电设备230的充电速度快于无线充电信号的发射装置220在第二无线充电模式下对待充电设备230的充电速度。当无线充电信号的发射装置220使用第一无线充电模式为待充电设备230内的电池充电时，待充电设备230可以控制第一充电通道233工作；当无线充电信号的发射装置220使用第二无线充电模式为待充电设备230内的电池充电时，待充电设备230可以控制第二充电通道236工作。
如上所述，在一个实施例中，为了降低无线充电过程中的线圈发热问题，采用第一无线充电模式时，可以采用上述图1-图3描述的充电方式进行无线充电。
在待充电设备侧，第二通信控制电路235可以根据充电模式，在第一充电通道233和第二充电通道236之间进行切换。当采用第一无线充电模式时，第二通信控制电路235控制第一充电通道233上的电压转换电路239工作。当采用第二无线充电模式时，第二通信控制电路235控制第二充电通道236上的变换电路237工作。
可选地，无线充电信号的发射装置220可以与无线充电信号的接收装置230之间进行通信，以协商无线充电信号的发射装置220与无线充电信号的接收装置230之间的充电模式。
除了上文描述的通信内容外，无线充电信号的发射装置220中的第一通信控制电路222与无线充电信号的接收装置230中的第二通信控制电路235之间还可以交互许多其他通信信息。在一些实施例中，第一通信控制电路222和第二通信控制电路235之间可以交互用于安全保护、异常检测或故障处理的信息，如电池232的温度信息，进入过压保护或过流保护的指示信息等信息，功率传输效率信息(该功率传输效率信息可用于指示无线发射电路221和无线接收电路231之间的功率传输效率)。
可选地，第二通信控制电路235与第一通信控制电路222之间的通信可以为单向通信，也可以为双向通信，本申请实施例对此不做具体限定。
在本申请的实施例中，第二通信控制电路的功能可由无线充电信号的接收装置230的应用处理器实现，由此，可以节省硬件成本。或者，也可由独立的控制芯片实现，由独立的控制芯片实现可提高控制的可靠性。
可选地，本申请实施例可以将无线接收电路232与电压转换电路239均集成在同一无线充电芯片中，这样可以提高待充电设备集成度，简化待充电设备的实现。例如，可以对传统无线充电芯片的功能进行扩展，使其支持充电管理功能。
本申请实施例提供的无线充电系统中的电池232可以包括一节电芯，也可以包括相互串联的N节电芯(N为大于1的正整数)。以N＝2为例，电池232可以包括第一电芯和第二电芯，且第一电芯和第二电芯相互串联。以充电功率等于20W，单节电芯的充电电压等于5V为例进行说明。为了满足串联双电芯对充电电压的要求，第一充电通道233的输出电压/输出电流需要维持在10V/2A。这样一来，无线发射电路基于10V/2A生成电磁信号，相应地，无线接收电路将电磁信号转换成10V/2A的输出电压/输出电流，由于电流从4A降低至2A，电能传输过程产生的热量就会相应降低。因此，本申请实施例也可以采用相互串联的多节电芯，以降低无线发射电路221和无线接收电路231产生的热量。
上文是以N＝2为例进行说明的，实际上，N的取值可以是3，也可以是3以上的正整数。相互串联的电芯越多，电能经过无线发射电路221和无线接收电路231所产生的热量就越小。
在本申请的一实施例中，为了保证充电速度，并进一步缓解无线充电信号的接收装置230的发热现象，本申请实施例对无线充电信号的接收装置230内部的电池结构进行了进一步的改造，引入了相互串联的多节电芯，与单电芯方案相比，如果要达到同等的充电速度，多节电芯所需的充电电流为单节电芯所需的充电电流的1/N(N为无线充电信号的接收装置230内的相互串联的电芯的数目)，换句话说，在保证同等充电速度的前提下，本发明实施例可以大幅降低充电电流的大小，从而进一步减少无线充电信号的接收装置230在充电过程的发热量。
本申请的一实施例中的多节电芯可以是规格、参数相同或相近的电芯，规格相同或相近的电芯便于统一管理，且选取规格、参数相同或相近的电芯能够提高多节电芯的整体性能和使用寿命。
在充电的过程中，第一充电通道或第二充电通道输出的电能可用于对相互串联的多节电芯充电。在供电过程中，可采用降压电路将多节电芯的电压降压后对无线充电信号的接收装置230进行系统供电，或者也可采用单节电芯进行系统供电。此外，在充电过程中，如果需要对系统供电，可直接通过充电管理电路分一条通路，对系统进行供电。
为了保持多节电芯的电量均衡，在充放电过程中，可通过均衡电路对多节电芯进行电量均衡。均衡电路的实现方式很多，例如，可以在电芯两端连接负载，消耗电芯的电量，使其与其它电芯的电量保持一致，从而使得各个电芯的电压保持一致。或者，可以采用电量高的电芯为电量低的电芯充电的方式进行均衡，直到各个电芯的电压一致为止。
如前所述，电池的充电过程可包括涓流充电阶段、恒流充电阶段和恒压充电阶段中的一个或多个。在本申请的一实施例中，为了进一步提高充电速度，通过对充电电压和充电电流的控制，实现缩短恒压充电阶段的充电时长或去掉恒压充电阶段。从而，相比于相关技术中的充电过程，可极大地提高充电速度。
在一个实施例中，设置一高于电池的标准截止电压的限制电压Vn，以及设置多个充电电流[I1、I2、I3、……、In]，n≥1。其中，I1≥I2≥I3……。应理解，限制电压Vn跟电池的体系、采用的材料等相关。在一些实施例中，若电池的标准截止电压为V0，可将Vn设置为V0+△V，例如，△V可在0.05V到0.1V之间取值。充电电流I1、I2、……、In的值也跟电池的体系、采用的材料等相关。例如，In可为700mA。
当电池体系确定后，电池的容量确定，根据充电电压、充电电流、充电时间和电池容量的关系，当充电电压等于限制电压Vn时，可确定不同阶段的充电电流的大小。在一些实施例中，可设置I1、I2、I3……In中，相邻两个充电电流之间的差值均为△I，例如，△I可在100mA到1A之间进行取值。
在一些实施例中，无论是采用上述的第一充电通道，还是第二充电通道，当电池电压被充到标准截止电压时，以充电电流I1对电池进行恒流充电，直到电池电压达到限制电压Vn。由于电池以电流I1进行恒流充电，停止后电压会产生回落。因此，可以再对电池以电流I2进行恒流充电，直到电池电压达到限制电压Vn。重复以上步骤，直至使用最后一个步次充电电流In充电至限制电压Vn，则可停止充电。由此，通过设置限制电压Vn，以及各个阶段的充电电流，可省去相关技术中的恒压充电阶段，极大地节省充电时间。即：
当电池电压充至标准截止电压时，通过多个充电阶段对电池进行充电，每个所述充电阶段对应一个充电电流，且相邻所述充电阶段的前一充电阶段对应的充电电流大于后一充电阶段对应的充电电流，每个所述充电阶段使用其对应的充电电流将所述电池的电压充电至限制电压，所述限制电压大于所述电池的标准截止电压；当多个所述充电阶段完成时，停止充电。
在另一些实施例中，无论是采用上述的第一充电通道，还是第二充电通道，当电池电压被充到标准截止电压时，以充电电流I1对电池进行恒流充电，直到电池电压达到限制电压Vn。再对电池以电流I2进行恒流充电，直到电池电压达到限制电压Vn。重复以上步骤，直至使用最后一个步次充电电流In充电至限制电压Vn，则以Vn为充电电压，恒压充电预设时间或待充电电流减小到预设值(例如，100mA)，则停止充电。该实施例中由于能够提高充电截止电压，减小恒压充电的时长，由此，相比相关技术，也可极大的节省充电时间。即：
当电池电压充至标准截止电压时，通过多个充电阶段对电池进行充电，每个所述充电阶段对应一个充电电流，且相邻所述充电阶段的前一充电阶段对应的充电电流大于后一充电阶段对应的充电电流，每个所述充电阶段使用其对应的充电电流将所述电池的电压充电至限制电压，所述限制电压大于所述电池的标准截止电压；以所述限制电压对所述电池进行恒压充电，直到所述电池的充电电流达到目标恒压充电截止电流或充电时长达到预设时长，则充电停止。
当电池为多电芯时，上述方法中，需监测每一电芯的电压是否都达到标准截止电压和限制电压。当有任一电芯的电压达到标准截止电压或限制电压时，执行充电电流的变换操作。或者，在一些实施例中，也可以将已经充满的电芯的充电通路断开，而继续对未充满的电芯执行充电。即，每一电芯都可独立按照上述的充电过程进行充电操作。
上文结合图2-图6，详细描述了本申请的装置实施例，下面结合图7，详细描述本申请的方法实施例，方法实施例与装置实施例相互对应，因此未详细描述的部分可以参见前面各装置实施例。
图7是本申请实施例提供的无线充电方法的示意性流程图。所述方法可应用于无线充电信号的发射装置，例如可以是上文描述的无线充电信号的发射装置220。图7的方法包括步骤S710-S730。
S710、发射无线充电信号；
S720、从接收装置接收第一反馈信号；
S730、根据所述第一反馈信号调整所述无线充电信号的发射功率，所述第一反馈信号为无线接收电路的输出电流对应的反馈信号。
可选地，S730可包括：根据所述电流反馈信息根据所述第一反馈信号调整所述无线充电信号的发射频率。
可选地，S730可包括：根据所述第一反馈信号调整所述无线发射电路的输入电压和/或输入电流。
可选地，图7的方法还可包括：对电源提供设备的输出电压和/或输出电流进行调整，得到电压变换电路的输出电压；所述根据所述第一反馈信号调整所述无线充电信号的发射功率，包括：根据所述第一反馈信号调整电压变换电路的输出电压。
可选地，所述第一反馈信号包括调整信息，所述调整信息用于指示对所述无线充电信号的发射功率对应的电压和/或电流的大小进行调整。
可选地，图7的方法还可包括：从所述接收装置接收第二反馈信号，并根据所述第二反馈信号调整所述无线充电信号的发射功率，其中，所述第二反馈信号为所述电池的充电信息对应的反馈信号，所述电池的充电信息包括以下信息中的至少一种：充电电压，充电电流，当前电量以及当前电压。
可选地，所述根据所述第二反馈信号调整所述无线充电信号的发射功率，包括：根据所述第二反馈信号调整所述无线充电信号的发射频率。
可选地，所述根据所述第二反馈信号调整所述无线充电信号的发射功率，包括：根据所述第二反馈信号调整所述无线发射电路的输入电压和/或输入电流。
可选地，图7的方法还可包括：对电源提供设备的输出电压和/或输出电流进行调整，得到电压变换电路的输出电压，所述根据所述第二反馈信号调整所述无线充电信号的发射功率，包括：根据所述第二反馈信号调整所述电压变换电路的输出电压。
可选地，所述第二反馈信号包括调整信息，所述调整信息用于指示对所述无线充电信号的发射功率进行调整。
可选地，所述无线充电方法应用于发射装置，所述发射装置支持第一无线充电模式和第二无线充电模式，其中所述发射装置在所述第一无线充电模式下对所述接收装置的充电速度快于所述发射装置在所述第二无线充电模式下对所述接收装置的充电速度。
可选地，所述无线充电方法还包括：与所述接收装置进行通信，以协商使用所述第一无线充电模式或所述第二无线充电模式进行无线充电。
可选地，所述无线充电方法还包括：与所述接收装置进行握手通信；在所述握手通信成功的情况下，控制所述发射装置使用所述第一无线充电模式为所述接收装置进行充电。
可选地，所述无线充电方法还包括：与所述接收装置进行握手通信；在所述握手通信失败的情况下，控制所述发射装置使用所述第二无线充电模式为所述接收装置进行充电。
可选地，传输所述第一反馈信号和所述第二反馈信号采用以下方式中的至少一种进行传输：蓝牙，无线保真、反向散射调制方式、高载波频率的近距离无线通信方式、光通信、超声波通信、超带宽通信、移动通信和数据接口。
可选地，所述高载波频率为60GHz。
可选地，所述光通信基于红外线进行通信。
可选地，所述移动通信基于以下中的至少一种通信协议进行通信：5G通信协议、4G通信协议和3G通信协议。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其他任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如数字视频光盘(digital video disc，DVD))、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (28)

  1. 一种发射装置，其特征在于，包括：
    无线发射电路，用于发射无线充电信号；
    通信控制电路，用于从接收装置接收第一反馈信号，并根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，所述第一反馈信号为无线接收电路的输出电流对应的反馈信号。
  2. 根据权利要求1所述的发射装置，其特征在于，所述根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，包括：
    根据所述第一反馈信号调整所述无线充电信号的发射频率。
  3. 根据权利要求1所述的发射装置，其特征在于，所述根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，包括：
    根据所述第一反馈信号调整所述无线发射电路的输入电压和/或输入电流。
  4. 根据权利要求3所述的发射装置，其特征在于，所述发射装置还包括电压变换电路，所述电压变换电路的输入端与电源提供设备的输出端电连接，所述电压变换电路的输出端与所述无线发射电路的输入端电连接，所述电压变换电路用于对所述电源提供设备的输出电压和/或输出电流进行调整，得到所述电压变换电路的输出电压，
    所述根据所述第一反馈信号调整所述无线发射电路的输入电压和/或输入电流，包括：
    根据所述第一反馈信号调整所述电压变换电路的输出电压。
  5. 根据权利要求1-4中任一项所述的发射装置，其特征在于，所述第一反馈信号包括调整信息，所述调整信息用于指示所述发射装置对所述无线充电信号的发射功率对应的电压和/或电流的大小进行调整。
  6. 根据权利要求1-5中任一项所述的发射装置，其特征在于，所述通信控制电路还用于从所述接收装置接收第二反馈信号，并根据所述第二反馈信号调整所述无线充电信号的发射功率，其中，所述第二反馈信号为电池的充电信息对应的反馈信号，所述电池的充电信息包括以下信息中的至少一种：充电电压，充电电流，当前电量以及当前电压。
  7. 根据权利要求6所述的发射装置，其特征在于，所述根据所述第二反馈信号调整所述无线充电信号的发射功率，包括：
    根据所述第二反馈信号调整所述无线充电信号的发射频率。
  8. 根据权利要求6所述的发射装置，其特征在于，所述根据所述第二反馈信号调整所述无线充电信号的发射功率，包括：
    根据所述第二反馈信号调整所述无线发射电路的输入电压和/或输入电流。
  9. 根据权利要求8所述的发射装置，其特征在于，所述发射装置还包括电压变换电路，所述电压变换电路的输入端与电源提供设备的输出端电连接，所述电压变换电路的输出端与所述无线发射电路的输入端电连接，所述电压变换电路用于对所述电源提供设备的输出电压和/或输出电流进行调整，得到所述电压变换电路的输出电压，
    所述根据所述第二反馈信号调整所述无线发射电路的输入电压和/或输入电流，包括：
    根据所述第二反馈信号调整所述电压变换电路的输出电压。
  10. 根据权利要求6-9中任一项所述的发射装置，其特征在于，所述第二反馈信号包括调整信息，所述调整信息用于指示所述发射装置对所述无线充电信号的发射功率进行调整。
  11. 根据权利要求1-10中任一项所述的发射装置，其特征在于，所述发射装置支持第一无线充电模式和第二无线充电模式，其中所述发射装置在所述第一无线充电模式下对所述接收装置的充电速度快于所述发射装置在所述第二无线充电模式下对所述接收装置的充电速度。
  12. 根据权利要求11所述的发射装置，其特征在于，所述通信控制电路还用于与所述接收装置进行通信，以协商使用所述第一无线充电模式或所述第二无线充电模式进行无线充电。
  13. 根据权利要求11或12所述的发射装置，其特征在于，所述通信控制电路用于与所述接收装置进行握手通信，在所述握手通信成功的情况下，控制所述发射装置使用所述第一无线充电模式为所述接收装置进行充电。
  14. 根据权利要求11或12所述的发射装置，其特征在于，所述通信控制电路用于与所述接收装置进行握手通信，在所述握手通信失败的情况下，控制所述发射装置使用所述第二无线充电模式为所述接收装置进行充电。
  15. 一种无线充电方法，其特征在于，包括：
    发射无线充电信号；
    从接收装置接收第一反馈信号；
    根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，所述第一反馈信号为无线接收电路的输出电流对应的反馈信号。
  16. 根据权利要求15所述的无线充电方法，其特征在于，所述根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，包括：
    根据所述第一反馈信号调整所述无线充电信号的发射频率。
  17. 根据权利要求15所述的无线充电方法，其特征在于，所述根据所述第一反馈信号调整所述无线充电信号的发射功率对应的电压和/或电流的大小，包括：
    根据所述第一反馈信号调整所述无线发射电路的输入电压和/或输入电流。
  18. 根据权利要求17所述的无线充电方法，其特征在于，所述无线充电方法还包括：
    对电源提供设备的输出电压和/或输出电流进行调整，得到电压变换电路的输出电压，其中，所述电压变换电路的输入端与所述电源提供设备的输出端电连接，所述电压变换电路的输出端与所述无线发射电路的输入端电连接；
    所述根据所述第一反馈信号调整所述无线发射电路的输入电压和/或输入电流，包括：
    根据所述第一反馈信号调整所述电压变换电路的输出电压。
  19. 根据权利要求15-18中任一项所述的无线充电方法，其特征在于，所述第一反馈信号包括调整信息，所述调整信息用于指示对所述无线充电信号的发射功率对应的电压和/或电流的大小进行调整。
  20. 根据权利要求15-19中任一项所述的无线充电方法，其特征在于，所述无线充电方法还包括：
    从所述接收装置接收第二反馈信号，并根据所述第二反馈信号调整所述无线充电信号的发射功率，其中，所述第二反馈信号为电池的充电信息对应的反馈信号，所述电池的充电信息包括以下信息中的至少一种：充电电压，充电电流，当前电量以及当前电压。
  21. 根据权利要求20所述的无线充电方法，其特征在于，所述根据所述第二反馈信号调整所述无线充电信号的发射功率，包括：
    根据所述第二反馈信号调整所述无线充电信号的发射频率。
  22. 根据权利要求20所述的无线充电方法，其特征在于，所述根据所述第二反馈信号调整所述无线充电信号的发射功率，包括：
    根据所述第二反馈信号调整所述无线发射电路的输入电压和/或输入电流。
  23. 根据权利要求22所述的无线充电方法，其特征在于，所述无线充电方法还包括：
    对电源提供设备的输出电压和/或输出电流进行调整，得到电压变换电路的输出电压，其中，所述电压变换电路的输入端与所述电源提供设备的输出端电连接，所述电压变换电路的输出端与所述无线发射电路的输入端电连接；
    所述根据所述第二反馈信号调整所述无线发射电路的输入电压和/或输入电流，包 括：
    根据所述第二反馈信号调整所述电压变换电路的输出电压。
  24. 根据权利要求20-23中任一项所述的无线充电方法，其特征在于，所述第二反馈信号包括调整信息，所述调整信息用于指示对所述无线充电信号的发射功率进行调整。
  25. 根据权利要求15-24中任一项所述的无线充电方法，其特征在于，所述无线充电方法应用于发射装置，所述发射装置支持第一无线充电模式和第二无线充电模式，其中所述发射装置在所述第一无线充电模式下对所述接收装置的充电速度快于所述发射装置在所述第二无线充电模式下对所述接收装置的充电速度。
  26. 根据权利要求25所述的无线充电方法，其特征在于，所述无线充电方法还包括：
    与所述接收装置进行通信，以协商使用所述第一无线充电模式或所述第二无线充电模式进行无线充电。
  27. 根据权利要求25或26所述的无线充电方法，其特征在于，所述无线充电方法还包括：
    与所述接收装置进行握手通信；
    在所述握手通信成功的情况下，控制所述发射装置使用所述第一无线充电模式为所述接收装置进行充电。
  28. 根据权利要求25或26所述的无线充电方法，其特征在于，所述无线充电方法还包括：
    与所述接收装置进行握手通信；
    在所述握手通信失败的情况下，控制所述发射装置使用所述第二无线充电模式为所述接收装置进行充电。
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