WO2019205004A1 - 终端设备和充电控制方法 - Google Patents

终端设备和充电控制方法 Download PDF

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Publication number
WO2019205004A1
WO2019205004A1 PCT/CN2018/084389 CN2018084389W WO2019205004A1 WO 2019205004 A1 WO2019205004 A1 WO 2019205004A1 CN 2018084389 W CN2018084389 W CN 2018084389W WO 2019205004 A1 WO2019205004 A1 WO 2019205004A1
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WO
WIPO (PCT)
Prior art keywords
wireless charging
voltage
terminal device
battery
charging
Prior art date
Application number
PCT/CN2018/084389
Other languages
English (en)
French (fr)
Inventor
万世铭
Original Assignee
Oppo广东移动通信有限公司
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 Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN201880068874.7A priority Critical patent/CN111279574B/zh
Priority to PCT/CN2018/084389 priority patent/WO2019205004A1/zh
Priority to EP18916603.6A priority patent/EP3745554A4/en
Publication of WO2019205004A1 publication Critical patent/WO2019205004A1/zh
Priority to US16/985,751 priority patent/US11552503B2/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage

Definitions

  • the present application relates to the field of wireless charging, and more particularly, to a terminal device and a charging control method.
  • terminal devices such as mobile phones
  • wireless charging With the popularity of wireless charging technology, more and more terminal devices (such as mobile phones) support wireless charging.
  • terminal devices typically require wireless charging via a wireless charging dock.
  • the wireless charging base is more troublesome to carry, resulting in a wireless charging process that is not flexible enough.
  • the application provides a terminal device and a charging control method to improve the flexibility of the wireless charging process.
  • a terminal device includes: a receiving coil for receiving a wireless charging signal; a wireless charging module, configured to wirelessly charge a battery according to a wireless charging signal received by the receiving coil; and an inverter circuit, configured to: And generating an alternating current signal according to the power supply voltage provided by the battery; and transmitting a coil for transmitting the wireless charging signal according to the alternating current signal.
  • a second aspect provides a charging control method, including: receiving a wireless charging signal; wirelessly charging a battery in the terminal device according to the received wireless charging signal; generating an alternating current signal according to the power supply voltage provided by the battery; AC signal, outgoing wireless charging signal.
  • the terminal device provided by the present application can be used as a wireless receiving end to receive a wireless charging signal, or can be used as a wireless transmitting end to transmit a wireless charging signal, so that the terminal devices can wirelessly charge each other and improve wireless charging. Flexibility.
  • FIG. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a charging control method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a charging control method according to another embodiment of the present application.
  • the terminal device mentioned in the embodiment of the present application includes, but is not limited to, being configured to be connected via a wire line (such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable. , direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLANs), such as digital video broadcasting handheld (DVB-) H) means for receiving/transmitting a communication signal by a digital television network of a network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and/or a wireless interface of another communication terminal.
  • a wire line such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable. , direct cable connection, and/or another data connection/network
  • WLANs wireless local area networks
  • DVB- digital video broadcasting handheld
  • a terminal configured to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal”, and/or a “mobile terminal.”
  • mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that can combine cellular radio telephones with data processing, fax, and data communication capabilities; may include radio telephones, pagers, the Internet/ Intranet access, web browser, memo pad, calendar, and/or personal digital assistant (PDA) for global positioning system (GPS) receivers; and conventional laptop and/or palm Receiver or other electronic device including a radiotelephone transceiver.
  • PCS personal communication system
  • PDA personal digital assistant
  • GPS global positioning system
  • the terminal device mentioned in the embodiment of the present application may refer to a mobile terminal as a device or a handheld terminal device, such as a mobile phone, a pad, or the like.
  • the terminal device mentioned in the embodiment of the present application may refer to a chip system.
  • the battery of the terminal device may or may not belong to the chip system.
  • a conventional terminal device generally only serves as a receiving end of wireless charging, and receives a wireless charging signal (such as a wireless charging signal transmitted by an external wireless charging base) to charge a battery inside the terminal device.
  • a wireless charging signal such as a wireless charging signal transmitted by an external wireless charging base
  • the wireless charging base is more troublesome to carry, resulting in a wireless charging process that is not flexible enough.
  • the embodiment of the present application provides a terminal device.
  • the terminal device provided in the embodiment of the present application is described in detail below with reference to FIG.
  • the terminal device 10 may include a coil 11 , a wireless charging module 12 , an inverter circuit 13 , and a battery 14 .
  • the coil 11 can include a receiving coil.
  • the receiving coil can be used to receive a wireless charging signal (such as a wireless charging signal transmitted by an external wireless charging device).
  • the receiving coil is sometimes also referred to as a receiving antenna.
  • the wireless charging module 12 can be used to wirelessly charge the battery 14 based on the wireless charging signal received by the receiving coil.
  • the wireless charging module 12 can include, for example, a wireless receiving circuit.
  • the wireless receiving circuit can be electrically connected to the receiving coil.
  • the wireless receiving circuit may include a shaping circuit such as a rectifier circuit and/or a filter circuit.
  • the wireless receiving circuit can be used to convert the alternating current outputted by the receiving coil into a direct current voltage as an output voltage of the wireless charging module 12, so that the wireless charging module 12 can use the direct current voltage to charge the battery 14.
  • the output voltage of the wireless charging module 12 can be directly loaded on both ends of the battery 14, or can be loaded on both ends of the battery 14 after being converted by other devices (such as a charging IC).
  • the inverter circuit 13 can be used to generate an AC signal based on the power supply voltage provided by the battery 14.
  • the AC signal can be an AC signal suitable for wireless transmission, such as a high frequency AC signal.
  • the embodiment of the present application does not specifically limit the form of the inverter circuit 13.
  • the inverter circuit 13 may be a bridge inverter circuit (such as a full bridge inverter circuit or a half bridge inverter circuit), or may be other types of inverter circuits, wherein the bridge inverter circuit may also be called an inverse. Rectifier bridge circuit.
  • a full-bridge inverter circuit composed of four switching tubes of the inverter circuit 13 is taken as an example.
  • the power supply voltage received at the input of the inverter circuit 13 can be converted into an alternating current signal suitable for wireless transmission.
  • the control circuit of the inverter circuit 13 can be various.
  • the inverter circuit 13 can be integrated with a separate controller.
  • the control function of the inverter circuit 13 can be implemented by the wireless charging module 12. Not limited.
  • the coil 11 can also include a transmit coil.
  • the transmitting coil can be used to transmit a wireless charging signal outward according to the AC signal output by the inverter circuit 13.
  • a capacitor C may be disposed between the inverter circuit 13 and the transmitting coil such that the capacitor C and the transmitting coil form an LC oscillating circuit, thereby converting the AC signal into a wireless charging signal (electromagnetic wave) for transmission.
  • the coil 11 can include a receiving coil and a transmitting coil.
  • the receiving coil and the transmitting coil may be two coils that are independent of each other, or may be the same coil (that is, the transmitting and receiving of the wireless charging signal share the same coil), which is not limited in this embodiment of the present application.
  • the receiving coil and the transmitting coil share the same coil to simplify the internal structure of the terminal device. The following mainly describes the case where the coil 11 simultaneously realizes the transmission and reception of the wireless charging signal.
  • the terminal device provided by the embodiment of the present application can be used as a wireless receiving end to receive a wireless charging signal, or can be used as a wireless transmitting end to transmit a wireless charging signal, so that the terminal devices can wirelessly charge each other, thereby improving the wireless device.
  • the flexibility of wireless charging can be used as a wireless receiving end to receive a wireless charging signal, or can be used as a wireless transmitting end to transmit a wireless charging signal, so that the terminal devices can wirelessly charge each other, thereby improving the wireless device.
  • the flexibility of wireless charging can be used as a wireless receiving end to receive a wireless charging signal, or can be used as a wireless transmitting end to transmit a wireless charging signal, so that the terminal devices can wirelessly charge each other, thereby improving the wireless device.
  • the inverter circuit 13 can generate an AC signal based on the power supply voltage supplied from the battery 14.
  • the manner in which the battery 14 supplies the power supply voltage to the inverter circuit 13 in the embodiment of the present application is not specifically limited.
  • the internal structure of the terminal device 10 can be modified to design a power supply path specially configured for the inverter circuit 13 between the battery 14 and the inverter circuit 13; or the inverter circuit 13 can be combined with other devices or functions.
  • the module shares the power supply path, that is, the power supply path for multiplexing other devices or function modules.
  • FIG. 2 a power supply path design scheme based on the OTG function introduced by the universal serial bus (USB) protocol is presented, which can multiplex the OTG power supply path.
  • USB universal serial bus
  • USB OTG is the abbreviation of On-The-Go
  • OTG technology introduces a power management function for USB devices, allowing a USB device to act as a host and providing other USB devices (other USB devices can be called USB OTG devices, equivalent to peripherals of USB devices as hosts) Power supply voltage (ie VBUS).
  • the USB interface of the USB device supporting the OTG function can be referred to as a USB OTG interface.
  • the terminal device 10 can provide the power supply voltage to the inverter circuit 13 by using an OTG power supply path provided by the OTG technology, which is described in detail below with reference to FIG. 2 .
  • the terminal device 10 may further include a USB OTG interface 15 and a control module 16.
  • the control module 16 is a control module having an OTG function.
  • the control module 16 can be used to control the battery 14 to provide a supply voltage to an external USB OTG device via the USB OTG interface 15.
  • the control module 16 can also be used to control the battery 14 to provide a supply voltage to the inverter circuit 13.
  • one end of the control module 16 may be electrically connected to the battery 14, and the other end may be electrically connected to the USB OTG interface 15 and the inverter circuit 13 through a load switch 17 (bidirectional load switch).
  • the control module 16 can control the battery 14 to supply a power voltage to the USB OTG device or a power supply voltage to the inverter circuit 13 through the load switch 17.
  • the embodiment of the present application is equivalent to changing the traditional OTG power supply path so that it has the function of providing a power supply voltage for the inverter circuit, so that the terminal device has a wireless transmission function, and the implementation of the wireless transmission function based on the OTG technology is completed.
  • Part of the circuit or function of the traditional OTG power supply path has the advantages of low cost and easy implementation.
  • control module 16 is further configured to: determine whether the USB OTG interface 15 is connected to the USB OTG device before the control battery 14 supplies the power voltage to the inverter circuit 13; when the USB OTG interface 15 is connected When there is a USB OTG device, the control terminal device 10 generates a prompt message prompting the user to disconnect the USB OTG device from the USB OTG interface.
  • the prompt information may be, for example, a text message, an indicator light signal, or an alarm signal, which is not limited by the embodiment of the present application.
  • Sending a prompt message to the user can improve the security and user experience of the terminal device.
  • the above detection may not be performed, and the OTG power path is directly provided to the inverter circuit 13 through the load switch.
  • the control module 16 can be implemented in a variety of ways. For example, it may be a separate control module, such as a stand-alone USB controller, or may be integrated in other devices inside the terminal device 10, such as an integrated integrated circuit (IC) integrated in the terminal device 10.
  • IC integrated integrated circuit
  • the charging IC that integrates the control functions of the control module 16 may be referred to as a charging IC having an OTG function. The following mainly describes this implementation as an example.
  • the charging IC controlling the battery 14 to supply the power supply voltage to the inverter circuit 13 may include: when receiving a command to turn on the wireless transmitting function of the terminal device, the charging IC receives the voltage of the battery 14 and boosts the voltage of the battery (if The voltage of the battery 14 satisfies the demand of the wireless transmission function for the power supply voltage, and may not be boosted, and the boosted voltage is transmitted to the input terminal of the inverter circuit 13 as the power supply voltage of the inverter circuit 13.
  • the charging IC can also be used to receive a charging signal from the USB OTG interface 15 for constant voltage and/or constant current control to form a charging voltage for the battery 14.
  • the terminal device 10 can be compatible with a conventional USB charging scheme.
  • the charging IC is further configured to receive an output voltage of the wireless charging module 12; and perform constant voltage and/or constant current control on the output voltage of the wireless charging module 12 to form a charging voltage of the battery 14.
  • the terminal device 10 can be compatible with a conventional wireless charging scheme.
  • the charging IC is limited by the low conversion efficiency of the circuit, so that the unconverted portion of the electric energy is dissipated as heat. This part of the heat is focused on the inside of the terminal device 10.
  • the design space and the heat dissipation space of the terminal device 10 are both small (for example, the physical size of the mobile terminal used by the user is getting thinner and lighter, and a large number of electronic components are densely arranged in the mobile terminal to improve the performance of the mobile terminal), which is not only
  • the design difficulty of the charging IC is improved, and the heat concentrated in the terminal device 10 is difficult to be removed in time, thereby causing abnormality of the terminal device 10.
  • the heat accumulated on the charging IC may cause thermal interference to the electronic components near the charging IC, causing abnormal operation of the electronic components.
  • the heat accumulated on the charging IC may shorten the service life of the charging IC and nearby electronic components.
  • the heat accumulated on the charging IC may cause thermal interference to the battery, which may cause abnormal battery charging and discharging.
  • the heat accumulated on the charging IC which may cause the temperature of the terminal device 10 to rise, which affects the user's experience in charging.
  • the heat accumulated on the charging IC may cause a short circuit of the charging IC itself, so that the output voltage of the wireless charging module 12 is directly loaded on both ends of the battery, causing charging abnormality. If the battery is in an overvoltage state for a long time, even Causes battery explosion, endangering user safety.
  • the embodiment of the present application further provides a terminal device, which can reduce the heat generation of the terminal device, which is described in detail below with reference to FIG. 3.
  • the wireless charging channel where the charging IC 16 is located may be referred to as a first wireless charging channel 31 (also referred to as a normal wireless charging channel), and a second wireless charging is introduced on the basis of the first wireless charging channel 31.
  • Channel 32 also known as a fast wireless charging channel.
  • the terminal device 10 may also include a detection circuit (not shown).
  • a detection circuit can be used to detect the output voltage and/or output current of the second wireless charging channel 32.
  • the wireless charging module 12 can be configured to perform wireless communication with the wireless charging device according to the output voltage and/or the output current of the second wireless charging channel 32 detected by the detecting circuit to adjust the transmitting power of the wireless charging device, so that the second wireless charging channel
  • the output voltage and / or output current of 32 matches the current required charging voltage and / or charging current of the battery
  • the output voltage and/or the output current of the wireless charging module 12 can be directly loaded on both ends of the battery to charge the battery 14 (hereinafter, this charging method is called direct charging).
  • this charging method is called direct charging.
  • the main heat source of the terminal device 10 is concentrated in the coil 11 and the wireless charging module 12.
  • the charging power is equal to 20W, and the charging voltage/charging current of a single cell is equal to 5V/4A as an example.
  • the wireless charging device at the transmitting end generates a wireless charging signal based on 5V/4A, and accordingly, the wireless charging module 12 inside the terminal device 10 converts the wireless charging signal into an output voltage/output current of 5V/4A.
  • This type of charging method based on low voltage and high current causes a large amount of heat in the wireless charging process.
  • the embodiment of the present application further improves the above-mentioned direct charging mode, and the step-down circuit 33 is disposed on the second wireless charging channel 32, and the output voltage of the step-down circuit 33 is used as the charging voltage of the battery 14. .
  • the charging power is equal to 20W
  • the charging voltage/charging current of a single cell is equal to 5V/4A as an example.
  • the output voltage/output current of the step-down circuit 33 needs to be maintained at 5V/4A. Assuming that the step-down circuit 33 is a half-voltage circuit, the voltage before the step-down is 10V/2A.
  • the external wireless charging device generates a wireless charging signal based on 10V/2A, and accordingly, the wireless charging module 12 can convert the wireless charging signal into an output voltage/output current of 10V/2A, since the current is reduced from 4A to 2A, The heat generated by the power transfer process is correspondingly reduced.
  • the control function of the wireless charging module 12 can be implemented by, for example, a micro control unit (MCU), or can be implemented by an MCU and an application processor (AP) inside the terminal device.
  • MCU micro control unit
  • AP application processor
  • the step-down circuit 33 can be configured to receive the output voltage of the wireless charging module 12, perform a step-down process on the output voltage of the wireless charging module 12, obtain an output voltage and an output current of the step-down circuit 33, and based on the output voltage of the step-down circuit 33.
  • the output current charges the battery.
  • the implementation of the buck circuit 33 can be varied.
  • the buck circuit 33 can be a Buck circuit.
  • the buck circuit 33 can be a charge pump.
  • the introduction of the step-down circuit 33 keeps the voltage generated during the wireless transmission (such as the output voltage of the wireless charging module 12, etc.) at a higher voltage, thereby further reducing the heat generation of the system.
  • the terminal device 10 may further include a switch 34 and/or a capacitor 35.
  • the switch 34 can be used to control the wireless charging module 12 to turn off the wireless receiving function.
  • the switch 34 can be controlled to be turned off, and the wireless reception function is turned off.
  • Capacitor 35 can be used in conjunction with coil 11 to form an LC oscillating circuit to achieve the function of transmitting a wireless charging signal outward.
  • the device embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 3 .
  • the method embodiment of the present application is described in detail below with reference to FIG. 4 to FIG. 5 .
  • the method embodiment corresponds to the device embodiment, and thus is not described in detail. Portions can be found in the previous device embodiments.
  • the charging control method provided by the embodiment of the present application may include steps S410 to S440.
  • step S410 a wireless charging signal is received.
  • step S420 the battery in the terminal device is wirelessly charged according to the received wireless charging signal.
  • step S430 an alternating current signal is generated according to the power supply voltage supplied from the battery.
  • step S440 a wireless charging signal is transmitted outward according to the alternating current signal.
  • the method of FIG. 4 may further include: controlling the battery to supply a power voltage to an external USB OTG device through a USB OTG interface of the terminal device; and/or controlling the battery to provide power to the inverter circuit Voltage.
  • the method of FIG. 4 may further include: determining whether the USB OTG interface is connected to the USB OTG device; and when the USB interface is connected with the USB OTG The device controls the terminal device to generate prompt information, prompting the user to disconnect the USB OTG device and the USB OTG interface.
  • controlling the battery to supply a power voltage to the inverter circuit may include: receiving a voltage of the battery when a command to enable a wireless transmission function of the terminal device is received; The voltage is boosted; the boosted voltage is transmitted to the inverter circuit as a power supply voltage of the inverter circuit.
  • FIG. 5 is an illustration of a specific implementation of the method of Figure 4.
  • FIG. 5 is an example in which the terminal device adopts the structure shown in FIG. 3 as an example.
  • the method of FIG. 5 may include steps S502 to S522.
  • step S502 a command to start the wireless transmission function is received.
  • the command can be used to instruct the terminal device as a wireless transmitting end to provide a wireless charging signal for other terminal devices. This command can be triggered by the user of the terminal device 10.
  • step S504 it is determined whether the USB OTG interface is externally connected to the USB OTG device.
  • step S506 is performed; if the USB OTG interface is not connected to the USB OTG device, step S508 is performed.
  • step S506 the terminal device is controlled to generate prompt information.
  • the prompt information can be used to prompt the user to disconnect the USB OTG interface from the USB OTG device.
  • the prompt information may be, for example, a text message, an indicator light signal, or an alarm signal, which is not limited by the embodiment of the present application.
  • step S508 the wireless charging module is configured in a wireless transmission mode.
  • the step is an optional step. If the control function of the inverter circuit is implemented by the wireless charging module, the mode of the wireless charging module can be configured as a wireless transmission mode, so that the wireless charging module controls the inverter circuit to convert the power supply voltage provided by the battery into AC signal. If the control function of the inverter circuit is implemented by the inverter circuit itself or by a controller other than the wireless charging module, step S508 need not be performed.
  • step S510 the control switch 34 is in the off state.
  • the wireless receiving function of the terminal device 10 can be turned off by step S510.
  • step S512 the OTG function of the charging IC is turned on, and the power supply voltage is output in reverse.
  • the charging IC receives the voltage of the battery, and performs voltage boosting on the voltage of the battery to obtain a power supply voltage.
  • the power supply voltage can be, for example, 10V or 15V.
  • step S514 it is determined whether or not there is a wireless receiving device approaching.
  • the wireless receiving device can be, for example, other terminal devices. There are a plurality of ways of determining in step S514. For example, the determination may be made based on the distance sensor or may be determined based on the reception status of the wireless charging signal.
  • step S516 is performed; if no wireless receiving device is in proximity, step S518 is performed.
  • step S5166 the wireless receiving device is wirelessly charged.
  • step S528 the preset time is awaited.
  • the preset time can be configured according to experience or actual needs, for example, it can be 15 seconds.
  • step S520 it is determined whether or not the wireless receiving device is in proximity.
  • step S516 is performed; if no wireless receiving device is in proximity, step S522 is performed.
  • step S522 "the wireless receiving device is not detected” is prompted.
  • the terminal device may reset after issuing the prompt information; or, the terminal device may directly reset without prompting the prompt information.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)).
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium such as a digital video disc (DVD)
  • a semiconductor medium such as a solid state disk (SSD)
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • 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, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

Abstract

提供一种终端设备和充电控制方法。该终端设备包括：接收线圈，用于接收无线充电信号；无线充电模块，用于根据接收线圈接收的无线充电信号为电池进行无线充电；逆变电路，用于根据电池提供的电源电压，生成交流信号；发射线圈，用于根据交流信号，向外发射无线充电信号。该终端设备既可以作为无线接收端，接收无线充电信号，也可以作为无线发射端，向外发射无线充电信号，这样一来，终端设备之间可以互相进行无线充电，提高了无线充电的灵活性。

Description

终端设备和充电控制方法 技术领域
本申请涉及无线充电领域，并且更为具体地，涉及一种终端设备和充电控制方法。
背景技术
随着无线充电技术的普及，越来越多的终端设备(如手机)支持无线充电功能。
目前，终端设备通常需要经过无线充电底座进行无线充电。无线充电底座的携带比较麻烦，导致无线充电过程不够灵活。
发明内容
本申请提供一种终端设备和充电控制方法，以提高无线充电过程的灵活性。
第一方面，提供一种终端设备，包括：接收线圈，用于接收无线充电信号；无线充电模块，用于根据所述接收线圈接收的无线充电信号为电池进行无线充电；逆变电路，用于根据所述电池提供的电源电压，生成交流信号；发射线圈，用于根据所述交流信号，向外发射无线充电信号。
第二方面，提供一种充电控制方法，包括：接收无线充电信号；根据接收的无线充电信号为终端设备中的电池进行无线充电；根据所述电池提供的电源电压，生成交流信号；根据所述交流信号，向外发射无线充电信号。
本申请提供的终端设备既可以作为无线接收端，接收无线充电信号，也可以作为无线发射端，向外发射无线充电信号，这样一来，终端设备之间可以互相进行无线充电，提高了无线充电的灵活性。
附图说明
图1是本申请一个实施例提供的终端设备的示意性结构图。
图2是本申请另一实施例提供的终端设备的示意性结构图。
图3是本申请又一实施例提供的终端设备的示意性结构图。
图4是本申请一个实施例提供的充电控制方法的示意性流程图。
图5是本申请另一实施例提供的充电控制方法的示意性流程图。
具体实施方式
本申请实施例提及的终端设备包括但不限于：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，本申请实施例提及的终端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终端设备可以是指芯片系统，在该实施例中，终端设备的电池可以属于或也可以不属于该芯片系统。
传统的终端设备一般仅会作为无线充电的接收端，接收无线充电信号(如外部的无线充电底座发射的无线充电信号)，为终端设备内部的电池进行充电。无线充电底座的携带比较麻烦，导致无线充电过程不够灵活。
针对上述问题，本申请实施例提供一种终端设备。下面结合图1，对本申请实施例提供的终端设备进行详细说明。
如图1所示，本申请实施例提供的终端设备10可以包括线圈11、无线充电模块12、逆变电路13以及电池14。
线圈11可以包括接收线圈。接收线圈可用于接收无线充电信号(如外部的无线充电装置发射的无线充电信号)。接收线圈有时也可称为接收天线。
无线充电模块12可用于根据接收线圈接收的无线充电信号为电池14进行无线充电。无线充电模块12例如可包括无线接收电路。无线接收电路可以与接收线圈电连接。无线接收电路可以包括整流电路和/或滤波电路等整形电路。无线接收电路可用于将接收线圈输出的交流电转换成直流电压，作为无线充电模块12的输出电压，使得无线充电模块12可以利用该直流电压为电池14充电。无线充电模块12的输出电压可以直接加载在电池14两端，也可以经其他器件(如充电IC)进行转换后再加载在电池14的两端。
逆变电路13可用于根据电池14提供的电源电压生成交流信号。该交流信号可以是适于无线发射的交流信号，如高频交流信号。
本申请实施例对逆变电路13的形式不做具体限定，只要能够将直流信号转换成交流信号的逆变电路均可用于本申请实施例。例如，逆变电路13可以是桥式逆变电路(如全桥逆变电路或半桥逆变电路)，也可以是其他类型的逆变电路，其中桥式逆变电路有时也可称为逆整流桥电路。
以逆变电路13为4个开关管构成的全桥逆变电路为例。通过控制4个开关管的通断顺序和频率，可以将逆变电路13的输入端接收到的电源电压转换成适于无线发射的交流信号。逆变电路13的控制方式可以有多种，例如，逆变电路13可以集成独立的控制器；或者，也可以由无线充电模块12实现对逆变电路13的控制功能，本申请实施例对此并不限定。
线圈11还可包括发射线圈。发射线圈可用于根据逆变电路13输出的交流信号，向外发射无线充电信号。例如，在逆变电路13和发射线圈之间可以设置电容C，使得电容C与发射线圈形成LC振荡电路，从而将交流信号转换成无线充电信号(电磁波)发射出去。
上文指出线圈11可以包括接收线圈和发射线圈。该接收线圈和发射线圈可以是相互独立的两个线圈，也可以同一线圈(即无线充电信号的收发共用同一线圈)，本申请实施例对此并不限定。接收线圈和发射线圈共用同一线圈可以简化终端设备的内部结构。下文主要以线圈11同时实现无线充电信号的收发为例进行说明。
本申请实施例提供的终端设备既可以作为无线接收端，接收无线充电信号，也可以作为无线发射端，向外发射无线充电信号，这样一来，终端设备之间可以互相进行无线充电，提高了无线充电的灵活性。
上文指出，逆变电路13可以根据电池14提供的电源电压生成交流信号。 但是，本申请实施例对电池14向逆变电路13提供电源电压的方式不做具体限定。例如，可以对终端设备10的内部结构进行改造，在电池14和逆变电路13之间设计一条专门配置给逆变电路13的电源供电路径；或者，逆变电路13也可以与其他器件或功能模块共用电源供电路径，即复用其他器件或功能模块的电源供电路径。下面结合图2，给出一种基于通用串行总线(universal serial bus，USB)协议推出的OTG功能的电源供电路径设计方案，能够复用OTG电源供电路径。
为了便于理解，先对OTG技术进行简单介绍。传统的USB设备需要通过主机(如个人电脑)相连，从而实现主机与USB设备或USB设备之间的数据传输或通信功能。在没有主机的情况下，USB设备之间(如手机之间，或手机与U盘之间)是无法进行数据传输或通信的。为了解决这一问题，USB OTG标准在USB2.0标准的基础上，为USB设备提供了OTG(OTG是On-The-Go的缩写)功能，旨在实现没有主机的情况下的USB设备间的数据传输或通信。具体而言，OTG技术为USB设备引入了电源管理功能，允许某个USB设备充当主机，为其他USB设备(其他USB设备可以称为USB OTG设备，相当于作为主机的USB设备的外设)提供电源电压(即VBUS)。支持OTG功能的USB设备的USB接口可以称为USB OTG接口。
可选地，在一些实施例中，终端设备10可以借用OTG技术提供的OTG电源供电路径为逆变电路13提供电源电压，下面结合图2进行详细描述。
如图2所示，终端设备10还可包括USB OTG接口15和控制模块16。该控制模块16为具有OTG功能的控制模块。控制模块16可用于控制电池14通过USB OTG接口15向外部的USB OTG设备提供电源电压。此外，控制模块16还可用于控制电池14为逆变电路13提供电源电压。
具体地，如图2所示，控制模块16的一端可以与电池14电连接，另一端可以通过负载开关17(双向负载开关)与USB OTG接口15和逆变电路13电连接。控制模块16可以通过负载开关17控制电池14为USB OTG设备提供电源电压或为逆变电路13提供电源电压。
本申请实施例相当于对传统OTG电源供电路径进行更改，使得其具备为逆变电路提供电源电压的功能，从而使得终端设备具备无线发射功能，这种基于OTG技术的无线发射功能的实现方式复用传统OTG电源供电路径的部分电路或功能，具有成本低、易于实现的优点。
可选地，在某些实现方式中，控制模块16还可用于：在控制电池14为逆变电路13提供电源电压之前，判断USB OTG接口15是否连接有USB OTG设备；当USB OTG接口15连接有USB OTG设备时，控制终端设备10生成提示信息，提示用户断开USB OTG设备与USB OTG接口之间的连接。
上述提示信息例如可以是文字信息，也可以是指示灯信号，还可以是告警信号，本申请实施例对此并不限定。向用户发出提示信息可以提高终端设备的安全性和用户体验。当然，在某些实施例中，一旦接收到无线发射功能开启的命令后，也可以不执行上述检测，直接通过负载开关将OTG电源路径提供给逆变电路13。
控制模块16的实现方式可以有多种。例如可以是独立的控制模块，比如独立的USB控制器，也可以集成在终端设备10内部的其他器件中，比如集成在终端设备10内部的充电集成电路(integrated circuit，IC)中。集成控制模块16的控制功能的充电IC可以称为具有OTG功能的充电IC。下面主要以这种实现方式为例进行说明。
充电IC控制电池14为逆变电路13提供电源电压的过程可以包括：当接收到开启终端设备的无线发射功能的命令时，充电IC接收电池14的电压，对电池的电压进行升压处理(如果电池14的电压满足无线发射功能对电源电压的需求，也可以不升压)，并将升压后的电压作为逆变电路13的电源电压，传输至逆变电路13的输入端。
可选地，在一些实施例中，充电IC还可用于从USB OTG接口15接收充电信号，对该充电信号进行恒压和/或恒流控制，形成电池14的充电电压。这样一来，终端设备10可以兼容传统的USB充电方案。
可选地，在一些实施例中，充电IC还可用于接收无线充电模块12的输出电压；对无线充电模块12的输出电压进行恒压和/或恒流控制，形成电池14的充电电压。这样一来，终端设备10可以兼容传统的无线充电方案。
充电IC受限于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终端设备10的内部。终端设备10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)，这不但提升了充电IC的设计难度，还会导致聚焦在终端设备10内的热量很 难及时移除，进而引发终端设备10的异常。
例如，充电IC上聚集的热量可能会对充电IC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，充电IC上聚集的热量，可能会缩短充电IC及附近电子元件的使用寿命。又如，充电IC上聚集的热量，可能会对电池造成热干扰，进而导致电池充放电异常。又如充电IC上聚集的热量，可能会导致终端设备10的温度升高，影响用户在充电时的使用体验。又如，充电IC上聚集的热量，可能会导致充电IC自身的短路，使得无线充电模块12的输出电压直接加载在电池两端而引起充电异常，如果电池长时间处于过压充电状态，甚至会引发电池的爆炸，危及用户安全。
本申请实施例还提供一种终端设备，能够降低终端设备的发热，下面结合图3进行详细描述。如图3所示，可以将充电IC 16所在无线充电通道称为第一无线充电通道31(也可称为普通无线充电通道)，并在第一无线充电通道31的基础上引入第二无线充电通道32(也可称为快速无线充电通道)。
终端设备10还可包括检测电路(图中未示出)。检测电路可用于检测第二无线充电通道32的输出电压和/或输出电流。无线充电模块12可用于根据检测电路检测到的第二无线充电通道32的输出电压和/或输出电流，与无线充电装置进行无线通信，以调整无线充电装置的发射功率，使得第二无线充电通道32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
这样一来，在终端设备10中，无线充电模块12的输出电压和/或输出电流就可以直接加载在电池的两端，为电池14进行充电(下文将这种充电方式称为直充)，从而可以避免上文描述的充电IC 16对无线充电模块的输出电压和/或输出电流进行变换而引发的能量损失、发热等问题。
在解决了充电IC 16的发热问题之后，终端设备10的主要发热源集中在线圈11和无线充电模块12中。
以充电功率等于20W，单节电芯的充电电压/充电电流等于5V/4A为例进行说明。作为一种可能的实现方式，假设发射端的无线充电装置基于5V/4A生成无线充电信号，相应地，终端设备10内部的无线充电模块12将无线充电信号转换成5V/4A的输出电压/输出电流，这种基于低压大电流的充电方式会导致无线充电过程产生较大热量。
为了降低无线充电过程的发热，本申请实施例对上述直充方式进行进一 步改进，在第二无线充电通道32上设置降压电路33，并将降压电路33的输出电压作为电池14的充电电压。仍以充电功率等于20W，单节电芯的充电电压/充电电流等于5V/4A为例进行说明。为了满足电池14对充电电压的要求，降压电路33的输出电压/输出电流需要维持在5V/4A，假设降压电路33为半压电路，那么降压前的电压即为10V/2A。这样一来，外部的无线充电装置基于10V/2A生成无线充电信号，相应地，无线充电模块12可以将无线充电信号转换成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。
上述无线充电模块12的控制功能例如可以通过微控制单元(micro control unit，MCU)实现，或者可以通过MCU与终端设备内部的应用处理器(application processor，AP)共同实现。
降压电路33可用于接收无线充电模块12的输出电压，对无线充电模块12的输出电压进行降压处理，得到降压电路33的输出电压和输出电流，并基于降压电路33的输出电压和输出电流对电池进行充电。
降压电路33的实现形式可以有多种。作为一个示例，降压电路33可以为Buck电路。作为另一个示例，降压电路33可以为电荷泵(charge pump)。
降压电路33的引入使得无线传输过程中产生的电压(如无线充电模块12的输出电压等)保持在较高电压，从而进一步降低了系统的发热。
可选地，在一些实施例中，如图3所示，终端设备10还可以包括开关34和/或电容35。开关34可用于控制无线充电模块12关闭无线接收功能。例如，当终端设备10进入无线发射模式时，可以控制开关34断开，关闭无线接收功能。电容35可用于与线圈11共同组成LC振荡电路，以实现向外发射无线充电信号的功能。
上文结合图1-图3，详细描述了本申请的装置实施例，下面结合图4-图5，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。
如图4所示，本申请实施例提供的充电控制方法可以包括步骤S410-步骤S440。
在步骤S410中，接收无线充电信号。
在步骤S420中，根据接收的无线充电信号为终端设备中的电池进行无线充电。
在步骤S430中，根据所述电池提供的电源电压，生成交流信号。
在步骤S440中，根据所述交流信号，向外发射无线充电信号。
可选地，图4的方法还可包括：控制所述电池通过所述终端设备的USB OTG接口向外部的USB OTG设备提供电源电压；和/或控制所述电池为所述逆变电路提供电源电压。
可选地，在控制所述电池为所述逆变电路提供电源电压之前，图4的方法还可包括：判断所述USB OTG接口是否连接有USB OTG设备；当所述USB接口连接有USB OTG设备时，控制所述终端设备生成提示信息，提示用户断开所述USB OTG设备与所述USB OTG接口之间的连接。
可选地，所述控制所述电池为所述逆变电路提供电源电压可包括：当接收到开启所述终端设备的无线发射功能的命令时，接收所述电池的电压；对所述电池的电压进行升压处理；将所述升压后的电压作为所述逆变电路的电源电压，传输至所述逆变电路。
图5是图4方法的具体实现方式的示例。图5是以终端设备采用图3所示的结构为例进行说明的。如图5所示，图5的方法可以包括步骤S502至步骤S522。
在步骤S502中，接收启动无线发射功能的命令。
该命令可用于指示终端设备作为无线发射端，为其他终端设备提供无线充电信号。该命令可以由终端设备10的用户触发。
在步骤S504中，判断USB OTG接口是否外接有USB OTG设备。
如果USB OTG接口外接有USB OTG设备，则执行步骤S506；如果USB OTG接口未外接USB OTG设备，则执行步骤S508。
在步骤S506中，控制终端设备生成提示信息。
该提示信息可用于向用户提示需要断开USB OTG接口与USB OTG设备的连接。该提示信息例如可以是文字信息，也可以是指示灯信号，还可以是告警信号，本申请实施例对此并不限定。
在步骤S508中，将无线充电模块配置为无线发射模式。
该步骤为可选步骤，如果逆变电路的控制功能由无线充电模块实现，则可以将无线充电模块的模式配置为无线发射模式，使得无线充电模块控制逆变电路将电池提供的电源电压转换为交流信号。如果逆变电路的控制功能由逆变电路自己实现，或由除无线充电模块之外的其他控制器实现，则无需执 行步骤S508。
在步骤S510中，控制开关34处于断开状态。
通过步骤S510可以关闭终端设备10的无线接收功能。
在步骤S512中，开启充电IC的OTG功能，反向输出电源电压。
具体地，充电IC接收电池的电压，对电池的电压进行升压处理，得到电源电压。该电源电压例如可以是10V或15V。
在步骤S514中，判断是否有无线接收设备靠近。
无线接收设备例如可以是其他终端设备。步骤S514的判断方式可以有多种。例如，可以基于距离传感器进行判断，也可以基于无线充电信号的接收状况进行判断。
如果有无线接收设备靠近，则执行步骤S516；如果没有无线接收设备靠近，则执行步骤S518。
在步骤S516中，对无线接收设备进行无线充电。
在步骤S518中，等待预设时间。
该预设时间可以根据经验或实际需要进行配置，例如可以是15秒。
在步骤S520中，判断是否有无线接收设备靠近。
如果有无线接收设备靠近，则执行步骤S516；如果没有无线接收设备靠近，则执行步骤S522。
在步骤S522中，提示“未检测到无线接收设备”。
可选地，在一些实施例中，终端设备在发出提示信息之后可以复位；或者，终端设备可以不发出提示信息直接复位。
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发明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 (16)

  1. 一种终端设备，其特征在于，包括：
    接收线圈，用于接收无线充电信号；
    无线充电模块，用于根据所述接收线圈接收的无线充电信号为电池进行无线充电；
    逆变电路，用于根据所述电池提供的电源电压，生成交流信号；
    发射线圈，用于根据所述交流信号，向外发射无线充电信号。
  2. 根据权利要求1所述的终端设备，其特征在于，所述终端设备还包括：
    通用串行总线USB OTG接口；
    控制模块，用于控制所述电池通过所述USB OTG接口向外部的USB OTG设备提供电源电压，所述控制模块还用于控制所述电池为所述逆变电路提供电源电压。
  3. 根据权利要求2所述的终端设备，其特征在于，所述控制模块的一端与所述电池电连接，另一端通过负载开关与所述USB OTG接口和所述逆变电路电连接，所述控制模块通过所述负载开关控制所述电池为所述USB OTG设备提供电源电压或为所述逆变电路提供电源电压。
  4. 根据权利要求2或3所述的终端设备，其特征在于，所述控制模块还用于：
    在控制所述电池为所述逆变电路提供电源电压之前，判断所述USB OTG接口是否连接有USB OTG设备；
    当所述USB接口连接有USB OTG设备时，控制所述终端设备生成提示信息，提示用户断开所述USB OTG设备与所述USB OTG接口之间的连接。
  5. 根据权利要求2-4中任一项所述的终端设备，其特征在于，所述控制模块为具有OTG功能的充电集成电路IC。
  6. 根据权利要求5所述的终端设备，其特征在于，所述充电IC用于：
    当接收到开启所述终端设备的无线发射功能的命令时，接收所述电池的电压，对所述电池的电压进行升压处理，并将所述升压后的电压作为所述逆变电路的电源电压，传输至所述逆变电路。
  7. 根据权利要求5或6所述的终端设备，其特征在于，所述充电IC还用于：
    接收所述无线充电模块的输出电压；
    对所述无线充电模块的输出电压进行恒压和/或恒流控制，形成所述电池的充电电压。
  8. 根据权利要求7所述的终端设备，其特征在于，所述充电IC位于所述终端设备的第一无线充电通道上，
    所述终端设备还包括：
    第二无线充电通道，所述第二无线充电通道将所述无线充电模块的输出电压直接作为所述电池的充电电压，为所述电池进行充电；
    检测电路，用于检测所述第二无线充电通道上的输出电压和/或输出电流；
    所述无线充电模块还用于根据所述检测电路检测到的所述第二无线充电通道上的输出电压和/或输出电流，与无线充电装置进行无线通信，以调整所述无线充电装置的发射功率，使得所述第二无线充电通道的输出电压和/或输出电流与所述电池当前所需的充电电压和/或充电电流相匹配。
  9. 根据权利要求7所述的终端设备，其特征在于，所述充电IC位于所述终端设备的第一无线充电通道上，
    所述终端设备还包括：
    第二无线充电通道，所述第二无线充电通道上设置有降压电路，所述降压电路用于对所述无线充电模块的输出电压进行降压处理，得到所述第二无线充电通道的输出电压，并基于所述第二无线充电通道的输出电压对所述电池进行充电；
    检测电路，用于检测所述第二无线充电通道上的电压和/或电流；
    所述无线充电模块还用于根据所述检测电路检测到的所述第二无线充电通道上的电压和/或电流，与无线充电装置进行无线通信，以调整所述无线充电装置的发射功率，使得所述第二无线充电通道的输出电压和/或输出电流与所述电池当前所需的充电电压和/或充电电流相匹配。
  10. 根据权利要求9所述的终端设备，其特征在于，所述降压电路为BUCK电路或电荷泵。
  11. 根据权利要求1-10中任一项所述的终端设备，其特征在于，所述逆变电路为桥式逆变电路。
  12. 根据权利要求1-11中任一项所述的终端设备，其特征在于，所述接 收线圈和所述发射线圈为同一线圈。
  13. 一种充电控制方法，其特征在于，包括：
    接收无线充电信号；
    根据接收的无线充电信号为终端设备中的电池进行无线充电；
    根据所述电池提供的电源电压，生成交流信号；
    根据所述交流信号，向外发射无线充电信号。
  14. 根据权利要求13所述的充电控制方法，其特征在于，所述充电控制方法还包括：
    控制所述电池通过所述终端设备的USB OTG接口向外部的USB OTG设备提供电源电压；和/或
    控制所述电池为所述逆变电路提供电源电压。
  15. 根据权利要求14所述的充电控制方法，其特征在于，在控制所述电池为所述逆变电路提供电源电压之前，所述充电控制方法还包括：
    判断所述USB OTG接口是否连接有USB OTG设备；
    当所述USB接口连接有USB OTG设备时，控制所述终端设备生成提示信息，提示用户断开所述USB OTG设备与所述USB OTG接口之间的连接。
  16. 根据权利要求14或15所述的充电控制方法，其特征在于，所述控制所述电池为所述逆变电路提供电源电压，包括：
    当接收到开启所述终端设备的无线发射功能的命令时，接收所述电池的电压；
    对所述电池的电压进行升压处理；
    将所述升压后的电压作为所述逆变电路的电源电压，传输至所述逆变电路。
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