WO2019014949A1 - 移动终端、外围设备及其充电方法 - Google Patents

移动终端、外围设备及其充电方法 Download PDF

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Publication number
WO2019014949A1
WO2019014949A1 PCT/CN2017/093955 CN2017093955W WO2019014949A1 WO 2019014949 A1 WO2019014949 A1 WO 2019014949A1 CN 2017093955 W CN2017093955 W CN 2017093955W WO 2019014949 A1 WO2019014949 A1 WO 2019014949A1
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WIPO (PCT)
Prior art keywords
battery
charging
mobile terminal
switch
resistor
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/CN2017/093955
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English (en)
French (fr)
Inventor
李涛
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Huawei Technologies Co Ltd
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Huawei Technologies Co 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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to JP2020502680A priority Critical patent/JP6884266B2/ja
Priority to AU2017423878A priority patent/AU2017423878B2/en
Priority to PCT/CN2017/093955 priority patent/WO2019014949A1/zh
Priority to EP17918131.8A priority patent/EP3648285B1/en
Priority to CN201780079810.2A priority patent/CN110100366B/zh
Priority to US16/632,793 priority patent/US11258280B2/en
Publication of WO2019014949A1 publication Critical patent/WO2019014949A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02J7/44—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data between battery management systems and power sources
    • 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
    • H02J7/70—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/751—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
    • 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
    • H02J7/34—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—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
    • H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
    • H02J7/52—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially for charge balancing, e.g. equalisation of charge between batteries
    • H02J7/56—Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters
    • 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
    • H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
    • H02J7/82—Control of state of charge [SOC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • 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
    • H02J2207/00—Details of circuit arrangements for charging or discharging batteries or supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers

Definitions

  • the present application relates to the field of electronic device technologies, and in particular, to a mobile terminal, a peripheral device, and a charging method thereof.
  • the tablet computer supplies power to the system through the built-in lithium battery, which is due to the trend of thin and light tablets on the market. Due to space constraints, the battery capacity of a flat panel is limited (about 4,000 to 6,000 mAh). In addition, the screen has a large screen and consumes a lot of power. The usage time is usually 4 to 6 hours. When the user goes out, he often has to carry a charging treasure, and the battery life is still difficult. Effectively gain improvement. The use of a power adapter to connect to the AC power supply will greatly reduce portability. When a tablet user is working in a light office, such as using office software, the tablet has a built-in virtual keyboard, which occupies the space displayed on the screen. If you use an external keyboard, perform character input and other operations, which is more conducive to user work. This two-in-one notebook has a good development prospect. However, the two-in-one notebook in the prior art still needs to be improved in terms of battery life.
  • Embodiments of the present application provide a mobile terminal, a peripheral device, and a charging method thereof, and the mobile terminal and the peripheral device can be independently powered and can mutually charge when the mobile terminal and the peripheral device are connected through a connector, thereby improving the use of the mobile terminal and the peripheral device. Endurance capacity.
  • the first aspect provides an electronic device, a mobile terminal, including: a first switch, a second switch, a first charging interface, a first charging circuit, a first connector, a first battery, and a first electronic controller;
  • the first end of the first switch is connected to the first charging interface, the second end of the first switch is connected to the first end of the first charging circuit;
  • the first end of the second switch is connected to the first end of the first charging circuit, the second switch The second end is connected to the first connector;
  • the second end of the first charging circuit is connected to the first battery for controlling the charging process of the first battery;
  • the first connector is for connecting the peripheral device;
  • the first electronic controller is The control end of the switch and the control end of the second switch are connected and communicate with the peripheral device;
  • the first electronic controller is configured to determine the charging mode according to the power of the first battery and the power of the second battery of the peripheral device, according to the charging mode control a state of a switch and a second switch, and sending control information to the peripheral device to notify
  • the mobile terminal further includes: a first dead zone control circuit and a first low dropout linear regulator, the first input end of the first dead zone control circuit is connected to the first charging interface, the first The output of the dead zone control circuit is connected to the first electronic controller; the input end of the first low dropout linear regulator is connected to the third end of the first charging circuit, and the first dead zone of the output of the first low dropout linear regulator a second input end of the control circuit; when the power of the first battery is less than or equal to the first threshold, and the first charging interface turns on the charger, the charger that is connected to the first charging interface passes through the first dead zone control circuit An electronic controller supplies power; when the first battery has a larger amount of power At the first threshold, the first battery supplies power to the first low dropout linear regulator through the first charging circuit, and the first low dropout linear regulator supplies power to the first electronic controller through the first dead zone control circuit.
  • the normal state of the first switch can be turned off, so that when the first charging interface of the mobile terminal is not inserted into the charger, the first charging interface of the mobile terminal is isolated from the internal circuit, and the mobile terminal is in a normal working state.
  • the bare first charging interface is not powered. Since the control of the first switch and the control of the second switch require the first electronic controller to supply power normally, when the power of the first battery is in a low power state, the first electronic controller cannot be normally powered, if the first switch is disconnected In the state, even if the first charging interface is connected to the charger, the first battery cannot be charged through the first switch, so that the first electronic controller supplies power normally.
  • the first dead zone control circuit provides a path for the first electronic controller to normally supply power, so that when the first battery is in a low power state, if the first charging interface is connected to the charger, the first electronic controller can be made Normal power supply, and thus control the first switch to close to charge the first battery.
  • the first dead zone control circuit includes: a buck conversion BUCK circuit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh a resistor, a first triode, a second triode, a first MOS (Metal-Oxide-Semiconductor) tube, and a second MOS transistor; wherein the input end of the BUCK circuit is connected to the first dead zone a first input end of the control circuit, the first end of the first resistor is connected to the first input end of the first dead zone control circuit, and the second end of the first resistor is connected to the enable EN (Enable) end of the BUCK circuit, the first resistor The second end is also connected to the ground through a second resistor; the EN end of the BUCK circuit is also connected to the collector of the first transistor, the emitter of the first transistor is connected to the ground, and the base of the first transistor is connected a first end
  • the method further includes a first Schottky diode and a second Schottky diode; wherein an anode of the first Schottky diode is connected to the first charging interface, and a cathode connection of the first Schottky diode
  • the cathode of the second Schottky diode, the anode of the second Schottky diode is connected to the second end of the second switch; the cathode of the first Schottky diode is also connected to the first input of the first dead zone control circuit.
  • the mobile terminal further includes a charger in-position detecting circuit, the charger in-position detecting circuit is connected to the first charging interface and the first electronic controller; wherein the charger in-position detecting circuit is configured to acquire the first a sampling voltage of a charging interface, the first electronic controller is configured to determine, according to the sampling voltage, whether the first charging interface has a charger turned on; when the first electronic controller determines that the first charging interface has a charger turned on and/or a peripheral device When the second charging interface has the charger turned on, the first electronic controller is further configured to re-determine the charging mode, and the charging manner further includes: charging the first battery and the second battery by the charger connected to the first charging interface, or second The charger connected to the charging interface charges the first battery and the second battery, or the charger connected to the first charging interface is the first battery and the charger connected to the second charging interface charges the second battery.
  • the charger in-position detecting circuit includes an eighth resistor and a ninth resistor; the first end of the eighth resistor is connected to the first charging interface, and the second resistor is connected to the second The first end of the ninth resistor is connected to the ground end, and the second end of the ninth resistor is connected to the ground end; the first end of the ninth resistor is connected to the first electronic controller; and the first electronic controller is configured to obtain the first end of the ninth resistor The voltage is sampled and the charging interface is determined to have a charger connected according to the sampling voltage.
  • the mobile terminal further includes a contralateral device in-position detecting circuit; the opposite device in-position detecting circuit is connected to the first electronic controller and the second connector; and the second connector is configured to connect the opposite device The grounding end; when the second connector is connected to the grounding end of the opposite device, the first electronic controller determines that the opposite device is in position according to the level of the second connector.
  • the opposite device in-position detecting circuit includes a tenth resistor and an eleventh resistor; a first end of the tenth resistor is connected to a power source of a predetermined voltage value, and a second end of the tenth resistor is connected to the first end of the eleventh resistor, The second end of the eleventh resistor is connected to the ground end; the second end of the tenth resistor is further connected to the first electronic controller and the second connector.
  • the first charging interface is a USB (Universal Serial Bus) interface
  • the first charging interface includes an identity ID (identification) pin
  • the ID pin is connected to the first electronic controller
  • the OTG (On-The-Go) transmission connector is inserted into the charging interface
  • the first electronic controller is configured to determine whether the first charging interface has an OTG transmission connector insertion according to the level of the ID pin.
  • the first switch and/or the second switch include: a third MOS transistor, a fourth MOS transistor, a twelfth resistor, a thirteenth resistor, and a third triode; and a third MOS transistor
  • the source is connected to the source of the fourth MOS transistor; the source of the third MOS transistor is also connected to the first end of the twelfth resistor, and the second end of the twelfth resistor is connected to the gate of the third MOS transistor, the fourth MOS a gate of the tube and a first end of the thirteenth resistor; a second end of the thirteenth resistor is connected to the collector of the third transistor, and an emitter of the third transistor is connected to the ground; the third MOS transistor When the fourth MOS transistor, the twelfth resistor, the thirteenth resistor and the third triode form a first switch, the drain of the third MOS transistor is connected to the first end of the first switch, and the drain of the fourth MOS transistor is connected.
  • the base of the third transistor is connected to the control end of the first switch;
  • the third MOS tube, the fourth MOS tube, the twelfth resistor, the thirteenth resistor and the third triode form a first In the case of two switches, the drain of the third MOS transistor is connected to the first end of the second switch, the drain of the fourth MOS transistor is connected to the second end of the second switch, and the base of the third transistor Connect the control terminal of the second switch.
  • the method further includes a current limiting circuit, wherein the current limiting pin of the first charging circuit is connected to the input end of the current limiting circuit, and the control end of the current limiting circuit is connected to the first electronic controller; the first electronic controller Determining, according to the electric quantity of the first storage battery and the electric quantity of the second storage battery, the charging power of the first storage battery and the charging power of the second storage battery, the first electronic controller controlling the limit of the first charging circuit by the current limiting circuit according to the charging power of the first storage battery
  • the current of the current pin is sent to the peripheral device, and the charging power of the first battery corresponds to the current of the current limiting pin.
  • the current limiting circuit includes: a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, and a fourth triode; the first end of the fourteenth resistor is connected to the current limiting pin of the first charging circuit, and the fourteenth The second end of the resistor is connected to the collector of the fourth triode; the first end of the fifteenth resistor is connected to the current limiting pin of the first charging circuit, and the second end of the fifteenth resistor is connected to the ground end; the fourth three pole
  • the gate of the tube is connected to the control terminal of the current limiting circuit through a sixteenth resistor, and the emitter of the fourth transistor is connected to the ground terminal.
  • An exemplary implementation further including a first display module; when the first electronic controller determines that the first battery is in a charging state, controlling the first display module to display an identifier of the mobile terminal in a charging state, the first electronic controller determines When the first storage battery is in the power supply state, the first display module is controlled to display the identifier of the mobile terminal in the power supply state; when the first electronic controller determines that the second storage battery is in the charging state, the first display module is controlled to be displayed.
  • the identifier of the peripheral device is in a charging state, and the first electronic controller determines that the second display battery is in the power supply state, and controls the first display module to display the identifier that the peripheral device is in the power supply state.
  • the first electronic controller is specifically configured to determine that the first battery of the mobile terminal is lower than the third threshold, and determine that the charging mode is that the second battery is the first battery;
  • An electronic controller is specifically configured to determine that the second battery of the peripheral device has a lower power and is lower than a fourth threshold, and then determine that the charging mode is that the first battery charges the second battery.
  • the first electronic controller when the first battery is charging the second battery, if the first electronic controller determines that the power of the first battery is lower than the fifth threshold, the first electronic controller is configured to control the second switch to be off. On, and send a stop charging control command to the peripheral device.
  • the first electronic controller when the second battery is charging the first battery, if the first electronic controller determines that the power of the second battery is lower than the sixth threshold, the first electronic controller is configured to control the second switch On, and send a stop power control command to the peripheral device.
  • the first connector is a pogo pin spring thimble connector.
  • a peripheral device including a third switch, a fourth switch, a second charging interface, a second charging circuit, a third connector, a second battery, and a second electronic controller;
  • the second connection is connected to the second charging interface, the second end of the third switch is connected to the first end of the second charging circuit; the first end of the fourth switch is connected to the first end of the second charging circuit, and the second end of the fourth switch is connected a third connector; the second end of the second charging circuit is connected to the second battery for controlling the charging process of the second battery;
  • the third connector is for connecting the mobile terminal; and the control end of the second electronic controller and the third switch And the control end of the fourth switch is connected and communicates with the mobile terminal;
  • the second electronic controller is configured to determine a charging mode according to the control information sent by the mobile terminal, and control the states of the third switch and the fourth switch according to the charging mode, where the charging manner includes The second battery is charging the first battery, or the first battery is charging the second battery.
  • the peripheral device further includes: a second dead zone control circuit and a second low dropout linear regulator; the first input of the second dead zone control circuit is coupled to the second charging interface, and the second The output of the dead zone control circuit is connected to the second electronic controller; the input of the second low dropout linear regulator is connected to the third end of the second charging circuit, and the output of the second low dropout linear regulator is the second dead zone.
  • the control circuit supplies power; when the power of the second battery is greater than the second threshold, the second battery supplies power to the second low-dropout linear regulator through the second charging circuit, and the second low-dropout linear regulator passes the second dead zone
  • the control circuit supplies power to the second electronic controller. In this way, the normal state of the third switch can be turned off, so that when the second charging interface of the mobile terminal is not inserted into the charger, the second charging interface of the mobile terminal is isolated from the internal circuit, and the mobile terminal is in a normal working state. The bare second charging interface is not powered.
  • the second electronic controller Since the control of the third switch and the control of the fourth switch require the second electronic controller to supply power normally, when the power of the second battery is in a low power state, the second electronic controller cannot be normally powered, if the third switch is disconnected In the state, even if the second charging interface is connected to the charger, the second battery cannot be normally charged through the third switch, so that the second electronic controller supplies power normally.
  • the second dead zone control circuit provides a path for the second electronic controller to normally supply power, so that when the second battery is in a low power state, if the second charging is connected
  • the port is connected to the charger to enable the second electronic controller to supply power normally, thereby controlling the third switch to be closed to charge the second battery.
  • the second electronic display controller further determines that the second display module displays the identifier of the mobile terminal in the charging state when the first battery is in the charging state, and the second electronic controller determines When the first storage battery is in the power supply state, the second display module is configured to display the identifier of the mobile terminal in the power supply state; and the second electronic controller determines that the second display module is in the charging state, and controls the second display module to display the identifier of the peripheral device in the charging state, When the second electronic controller determines that the second battery is in the power supply state, the second display module is controlled to display the identifier that the peripheral device is in the power supply state.
  • the second electronic controller is further configured to receive a stop charging control command sent by the mobile terminal, and control the fourth switch to be turned off according to the stop charging control command.
  • the second electronic controller is further configured to receive a power-off control command sent by the mobile terminal, and control the fourth switch to be turned off according to the power-off control command.
  • a third aspect provides a charging method for a mobile terminal, including the following steps: the mobile terminal determines a charging mode according to a power quantity of the first battery of the mobile terminal and a power quantity of the second battery of the peripheral device; and the mobile terminal controls the first switch according to the charging mode. And a state of the second switch, and sending control information to the peripheral device to notify the peripheral device of the charging mode, the charging mode includes: the first battery is charging the second battery of the peripheral device, or the second battery is charging the first battery.
  • the mobile terminal and the peripheral device can be independently powered and can be mutually charged when the mobile terminal and the peripheral device are connected through the connector, thereby improving the endurance capability of the mobile terminal and the peripheral device when used together, enriching product functions and improving Product competitiveness.
  • the mobile terminal determines whether the first charging interface has a charger turned on according to the sampling voltage of the first charging interface of the mobile terminal; the mobile terminal determines that the first charging interface of the mobile terminal has the charger turned on and / or the second charging interface of the peripheral device has a charging mode, and the charging mode is further determined, the charging mode further includes: charging the first battery and the second battery by the charger connected to the first charging interface, or charging the second battery or the second device The charger connected to the charging interface charges the first battery and the second battery, or the charger connected to the first charging interface is the first battery and the charger connected to the second charging interface charges the second battery.
  • the mobile terminal determines the charging power of the first battery and the charging power of the second battery according to the power of the first battery of the mobile terminal and the power of the second battery of the peripheral device, and the second battery The charging power is sent to the peripheral device.
  • the method further includes: when the mobile terminal determines that the first battery is in a charging state, displaying an identifier that the mobile terminal is in a charging state, and determining, by the mobile terminal, that the first battery is in a power supply state, displaying that the mobile terminal is powered The identifier of the state; when the mobile terminal determines that the second battery is in the charging state, the identifier indicating that the peripheral device is in the charging state is displayed, and when the mobile terminal determines that the second battery is in the power supply state, the identifier indicating that the peripheral device is in the power supply state is displayed.
  • the mobile terminal determines the charging mode according to the power of the first battery of the mobile terminal and the power of the second battery of the peripheral device, including: the mobile terminal determines that the power of the first battery of the mobile terminal is low and low. At a third threshold, determining that the charging mode is that the second battery is charging the first battery; or
  • the mobile terminal determines that the power of the second battery of the peripheral device is lower and lower than a fourth threshold, and determines that the charging mode is that the first battery is charging the second battery.
  • the mobile terminal when the first battery is charging the second battery, if the mobile terminal determines When the power of the first battery is lower than the fifth threshold, the mobile terminal controls the second switch to be turned off, and sends a stop charging control command to the peripheral device.
  • the mobile terminal when the second battery is charging the first battery, if the mobile terminal determines that the power of the second battery is lower than the sixth threshold, the mobile terminal controls the second switch to be disconnected and sends the signal to the peripheral device. Stop the power control command.
  • a fourth aspect provides a charging method for a peripheral device, including: determining, by a peripheral device, a charging mode according to control information sent by the mobile terminal; and controlling, by the peripheral device, a state of the third switch and the fourth switch according to the charging mode, where the charging manner includes: The battery is charged for the first battery, or the first battery is charged for the second battery.
  • the mobile terminal and the peripheral device can be independently powered and can be mutually charged when the mobile terminal and the peripheral device are connected through the connector, thereby improving the endurance capability of the mobile terminal and the peripheral device when used together, enriching product functions and improving Product competitiveness.
  • the peripheral device determines that the first battery is in a charging state, and displays an identifier of the mobile terminal in a charging state, and the peripheral device determines that the first battery is in a power supply state, and displays an identifier of the mobile terminal in a power supply state;
  • the indicator that the peripheral device is in the charging state is displayed, and the peripheral device determines that the second battery is in the power supply state, and displays the identifier that the peripheral device is in the power supply state.
  • the peripheral device receives the stop charging control command sent by the mobile terminal, and controls the fourth switch to be turned off according to the stop charging control command.
  • the peripheral device receives the power-off control command sent by the mobile terminal, and controls the fourth switch to be turned off according to the power-off control command.
  • FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of another application scenario provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a connection manner of a connector according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a mobile terminal and a peripheral device according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a mobile terminal and a peripheral device according to another embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a mobile terminal and a peripheral device according to still another embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a mobile terminal according to still another embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a switch according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a charger chip used in a first charging circuit according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a first current limiting circuit according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a display interface on a mobile terminal according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a display interface on a mobile terminal according to another embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram of a display interface on a mobile terminal according to another embodiment of the present disclosure.
  • FIG. 14 is a schematic diagram of a charging control logic according to an embodiment of the present application.
  • the embodiments of the present application relate to a mobile terminal and a peripheral device of the mobile terminal
  • the mobile terminal may include a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a vehicle-mounted computer, and the like.
  • the mobile terminal may include components such as an RF (Radio Frequency) circuit, a memory, other input devices, a display screen, a sensor, an audio circuit, an I/O subsystem, a processor, a charge management chip, and a power management chip.
  • the mobile terminal may also include a camera, a Bluetooth module, a virtual button, a physical button, and the like, and details are not described herein.
  • the structure of the above mobile terminal is not limited, and may include more or less components, or combine some components, or split some components, or different component arrangements.
  • the display screen belongs to a User Interface (UI) and that the handset may include fewer user interfaces than illustrated or less.
  • UI User Interface
  • the battery in the mobile terminal can supply power to the above components.
  • the peripheral device may be: a keyboard, a docking station, VR (Virtual Reality) glasses, etc., the peripheral device also has a battery, and the battery in the peripheral device can supply power to the peripheral device.
  • the provided mobile terminal and its peripheral devices each include a battery, and when the mobile terminal and its peripheral device are connected, in one example, the first battery of the mobile terminal can charge the second battery of the peripheral device. In another example, the second battery of the peripheral device can charge the first battery of the mobile terminal.
  • the first battery of the mobile terminal and the second battery of the peripheral device can be simultaneously charged by the charger connected to the mobile terminal, and of course, when the peripheral device is connected to the charger, the peripheral device can also be used.
  • the connected charger simultaneously charges the first battery of the mobile terminal and the second battery of the peripheral device.
  • the mobile terminal and peripheral devices can also be connected to the charger by themselves to charge the respective batteries.
  • the mobile terminal can be used as a tablet computer
  • the peripheral device is a keyboard as an example for detailed description, which satisfies the requirements of the tablet computer for increasing endurance.
  • other mobile terminals and peripheral devices such as a mobile phone and a docking station, can also be applied to the usage scenarios of the embodiments of the present application.
  • the keyboard uses a wireless keyboard, and the wireless keyboard and tablet need to be separately powered and independently powered. When one of the batteries is exhausted, it cannot be used any more.
  • the keyboard is powered by the tablet. In this mode, the keyboard can only be used when the two are connected together, and the ease of use cannot be separated.
  • the mobile terminal and the peripheral device provided by the embodiments of the present application can be independently powered, and can be mutually charged when two devices (such as a tablet and a keyboard) are connected through a hardware connector.
  • the embodiment of the present application is specifically described by the interaction between the tablet PCD and the keyboard KB.
  • the application scenario of the present application may be as follows: the tablet PAD can be used separately from the keyboard KB, wherein the tablet PAD and the keyboard KB both have a built-in power source (battery), and when used separately, the tablet PCD and the tablet PC
  • the keyboard KB can communicate via wireless signals.
  • the tablet PCD and the keyboard KB may also be used in combination. When combined, the tablet PCD and the keyboard KB are electrically connected and communicated through a hardware connector (pogo pin connector 11 and electrode pad 12).
  • the tablet PAD and keyboard KB can be electrically connected through the pogo pin connector.
  • the connector set on the tablet PAD is a pogo pin connector
  • the connector set on the keyboard KB is an electrode disk, or a key
  • the connector provided on the tablet PAD is an electrode disk.
  • the connector provided on the keyboard KB is the pogo pin connector 11
  • the connector provided on the tablet PAD is the electrode pad 12.
  • the pogo pin connector is electrically connected to the corresponding electrode pad, so that the tablet PCD and the keyboard KB form a connection relationship;
  • the pogo pin is a spring-type probe formed by the three basic components of the needle shaft a, the spring b, and the needle tube c, which are pre-stressed by precision instruments, and has a precise spring structure inside. Pogo pin has good corrosion resistance, stability and durability.
  • the Pogo pin connector Co1 is electrically connected to the corresponding electrode pad Co2, and the head of the spring probe is pressed against the contact electrode plate, and the connection relationship between the tablet PCD and the keyboard KB through the electrode disk and the pogo pin connector can be performed.
  • Signal transmission of course, the signal is not limited to: current signal, voltage signal, data signal, and the like.
  • the mobile terminal 10 provided by the embodiment of the present application includes: a first switch S1, a second switch S2, a first charging interface Ch1, a first charging circuit CI1, a first connector Co1, and a first battery Ba1. And the first electronic controller EC1.
  • the structural connection relationship included in the mobile terminal 10 is as follows:
  • the first end of the first switch S1 is connected to the first charging interface Ch1, the second end of the first switch S1 is connected to the first end of the first charging circuit CI1; the first end of the second switch S2 is connected to the first charging circuit CI1 One end, the second end of the second switch S2 is connected to the first connector Co1; the second end of the first charging circuit CI1 is connected to the first battery Ba1 for controlling the charging process of the first battery Ba1; the first connector Co1 For connecting the peripheral device 20; the first electronic controller EC1 is connected to the control terminal Ko1 of the first switch S1 and the control terminal Ko2 of the second switch S2, and communicates with the peripheral device 20.
  • the peripheral device 20 provided by the embodiment of the present application includes a third switch S3, a fourth switch S4, a second charging interface Ch2, a second charging circuit CI2, a third connector Co3, a second battery Ba2, and The second electronic controller EC2.
  • the structural connection relationship included in the peripheral device 20 is as follows:
  • the first end of the third switch S3 is connected to the second charging interface Ch2, the second end of the third switch S3 is connected to the first end of the second charging circuit CI2, and the first end of the fourth switch S4 is connected to the second charging circuit CI2.
  • the first end, the second end of the fourth switch S4 is connected to the third connector Co3;
  • the second end of the second charging circuit CI2 is connected to the second battery Ba2 for controlling the charging process of the second battery Ba2;
  • the third connector Co3 is used to connect to the mobile terminal 10;
  • the second electronic controller EC2 is connected to the control terminal Ko3 of the third switch S3 and the control terminal Ko4 of the fourth switch S4, and communicates with the mobile terminal 10.
  • the first electronic controller EC1 is configured to determine a charging mode according to the amount of power of the first battery Ba1 and the second battery Ba2 of the peripheral device 20, and control the states of the first switch S1 and the second switch S2 according to the charging mode, And transmitting control information to the peripheral device 20 to notify the peripheral device 20 of the charging mode;
  • the second electronic controller EC2 is configured to determine the charging mode according to the control information sent by the mobile terminal 10, and control the third switch S3 and the fourth switch according to the charging mode.
  • the charging method includes the first battery Ba1 charging the second battery Ba2, or the second battery Ba2 charging the first battery Ba1.
  • the first connector Co1 of the tablet PCD is electrically connected to the third connector Co3 of the keyboard KB; the second switch S2 of the tablet PCD is First The second end is electrically connected to the second end of the fourth switch S4 of the keyboard KB.
  • the charging mode uses the first battery Ba1 to charge the second battery Ba2
  • the first electronic controller EC1 controls the second of the tablet PAD according to the charging mode.
  • the switch S2 is closed, and the second electronic controller EC2 controls the fourth switch S4 of the keyboard KB to be closed according to the charging mode; similarly, when the charging mode uses the second battery Ba2 to charge the first battery Ba1, the first electronic controller EC1 is charged according to the charging.
  • the second switch S2 of the mode control tablet PAD is closed, and the second electronic controller EC2 controls the fourth switch S4 of the keyboard KB to be closed according to the charging mode.
  • the first electronic controller EC1 of the tablet PAD controls the first switch S1 of the tablet PAD to be disconnected, and the first electronic controller EC1 of the keyboard KB controls the keyboard KB
  • the third switch S3 is turned off. This can prevent the first charging interface Ch1 and the second charging interface Ch2 from being charged.
  • the path of the first battery Ba1 for charging the second battery Ba2 is: first battery Ba1->first charging circuit CI1->second switch S2->fourth switch S4->second charging circuit CI2->second battery Ba2
  • the first charging circuit CI1 of the PAD of the tablet operates in the reverse boost mode
  • the second charging circuit CI2 of the keyboard KB operates in the BUCK mode.
  • the path of the second storage battery Ba2 for charging the first storage battery Ba1 is: the second storage battery Ba2->the second charging circuit CI2->the fourth switch S4->the second switch S2->the first charging circuit CI1->the first battery Ba1
  • the second charging circuit CI2 of the keyboard KB operates in the reverse boost mode
  • the first charging circuit CI1 of the PAD of the tablet operates in the BUCK mode.
  • the first electronic controller EC1 on the tablet PAD can detect the power of the first storage battery Ba1 through the first charging circuit CI1; of course, the second electronic controller EC2 can pass the first The second charging circuit CI2 detects the amount of power of the second storage battery Ba2.
  • the first electronic controller EC1 and the second electronic controller EC2 can realize mutual communication, and the communication can be wireless communication or wired communication.
  • EC1 and EC2 can be connected to each other through at least one connector, or EC1 and EC2.
  • the first electronic controller EC1 as the main controller can receive the information reported by the second electronic controller EC2 as the slave controller, and the first electronic The controller EC1 can send control information to the second electronic controller EC2.
  • the EC1 of the PAD of the tablet and the EC2 of the keyboard KB can be communicated by the USB protocol, for example, two pairs are set between the EC1 of the PAD of the tablet and the EC2 of the keyboard KB.
  • the first electronic controller EC1 is specifically configured to determine that the electric quantity of the first storage battery Ba1 is lower than the third threshold, and then determine that the charging mode is that the second storage battery Ba2 charges the first storage battery Ba1; the first electronic controller EC1 is specifically used for It is determined that the electric quantity of the second storage battery Ba2 is lower and lower than the fourth threshold, and it is determined that the charging mode is that the first storage battery Ba1 charges the second storage battery Ba2.
  • the first electronic controller EC1 is used for control.
  • the second switch K2 is turned off and sends a stop charging control command to the keyboard KB.
  • the second electronic controller EC2 is configured to receive a stop charging control command sent by the tablet PCD, and control the fourth switch S4 to be turned off according to the stop charging control command.
  • the second battery Ba2 charges the first battery Ba1
  • the first electronic controller EC1 determines that the power of the second battery Ba2 is lower than the sixth threshold
  • the first electronic controller EC1 is used to control the second switch S2 to be disconnected. And send it to the keyboard KB Send the power supply control command.
  • the second electronic controller EC2 is further configured to receive a stop power supply control command sent by the tablet PCD, and control the fourth switch K4 to be turned off according to the stop power supply control command.
  • the mobile terminal and the peripheral device can be independently powered and can be mutually charged when the mobile terminal and the peripheral device are connected through the connector, thereby improving the endurance capability of the mobile terminal and the peripheral device when used together, enriching Product features have improved product competitiveness.
  • the tablet PCD further includes: a first charger in-position detecting circuit 51, the first charger in-position detecting circuit 51 is connected to the first charging interface Ch1 and the first electronic control
  • the first charger in-position detecting circuit 51 is configured to acquire the sampling voltage of the first charging interface Ch1
  • the first electronic controller EC1 is configured to determine whether the first charging interface Ch1 has a charger turned on according to the sampling voltage.
  • the first electronic controller EC1 is damaged, and a specific specification of the first charger in-position detecting circuit 51 is provided.
  • the first charger in-position detecting circuit 51 includes an eighth resistor R8 and a ninth resistor R9; the first end of the eighth resistor R8 is connected to the first charging interface Ch1, and the second end of the eighth resistor R9 is connected.
  • the first end of the ninth resistor R8 is connected to the ground end GND; the first end of the ninth resistor R9 is connected to the first electronic controller CE1; the first electronic controller CE1 is used to obtain the ninth resistor
  • EC1 detects the power of the first end of R9.
  • the voltage is divided by the resistor R9 to the power supply provided by the charger. Based on this EC1, the in-position detection of the charger can be realized.
  • the keyboard KB also has a second charger in-position detecting circuit 52, and its specific structure and connection manner are similar to those of the tablet PCD, and the second electronic controller CE2 can also be based on the second charger of the keyboard KB.
  • the sampling voltage of the bit detecting circuit 52 determines whether or not the keyboard KB is turned on, and notifies the first electronic controller CE1. In this way, the first electronic controller CE1 can know whether the tablet PAD and the keyboard KB have a charger connected.
  • the first electronic controller EC1 determines that the first charging interface Ch1 has the charger turned on and/or the second charging interface Ch2 of the keyboard KB has the charger turned on, the first electronic controller EC1 is further used to re-determine the charging mode.
  • the charging method further includes: charging the first battery Ba1 and the second battery Ba2 by the charger connected to the first charging interface Ch1, or charging the first battery Ba1 and the second battery Ba2 by the charger connected to the second charging interface Ch1, or
  • the charger connected to one charging interface Ch1 is the first battery Ba1 and the charger connected to the second charging interface Ch2 charges the second battery Ba2.
  • the first electronic controller EC1 controls the first switch S1 and the second switch S2 to be closed according to the charging mode
  • the second The electronic controller EC2 controls the fourth switch S4 to be closed according to the charging mode, and controls the third switch S3 to be turned off
  • the charging mode is that the charger connected by the second charging interface Ch1 charges the first battery Ba1 and the second battery Ba2
  • the first The electronic controller EC1 controls the first switch S1 to be turned off and the second switch S2 to be closed according to the charging mode
  • the second electronic controller EC2 controls the third switch S3 and the fourth switch S4 to be closed according to the charging mode.
  • the first charging interface Ch1 may include, but is not limited to: USB (Universal Serial Bus, Extended interface such as Universal Serial Bus), HDMI (High Definition Multimedia Interface), URAT (Universal Asynchronous Receiver/Transmitter), the following scheme uses USB as an example for description;
  • the interface Ch2 may include, but is not limited to, an extension interface such as USB, HDMI, and URAT. The following scheme is described by taking USB as an example.
  • the scheme of charging using the charger may specifically include the following two types:
  • Solution 1 The USB interface of the tablet computer is inserted into the charger, the first switch S1 and the second switch S2 of the EC1 control tablet PC of the tablet PAD are closed, and the fourth switch S4 of the EC2 control keyboard KB of the keyboard KB is closed, and the keyboard KB is closed.
  • the third switch S3 of the EC2 control keyboard KB is disconnected:
  • Charging path 1 is: Charger -> Tablet PC PAD USB interface -> Tablet PC PAD first switch S1-> Tablet PC PAD first charging circuit CI1-> Tablet PC PAD first battery Ba1 ;
  • Charging path 2 is: charger -> tablet PC PAD USB interface -> tablet PC PAD first switch S1-> tablet PC PAD second switch S2-> keyboard KB fourth switch S4-> keyboard The second charging circuit of the KB, Ch2-> the second battery Ba2 of the keyboard KB.
  • Solution 2 The USB interface of the keyboard is inserted into the charger, the second switch S2 of the tablet PAD of the tablet PAD is closed, the first switch S1 of the tablet PAD of the tablet PCD is disconnected, and the EC2 control keyboard of the keyboard KB is closed.
  • the third switch S3 of the KB and the fourth switch S4 are closed:
  • the charging path 1 is: charger-> keyboard KB USB interface-> keyboard KB third switch S3-> keyboard KB second charging circuit Ch2-> keyboard KB second battery Ba2;
  • Charging path 2 is: charger -> keyboard KB USB interface -> keyboard KB third switch S3-> keyboard KB fourth switch S4-> tablet PC PAD second switch S2-> tablet PC PAD The first charging circuit Ch1-> the first battery Ba1 of the PAD of the tablet.
  • the EC1 of the tablet PAD can also control the second switch S2 of the tablet PAD to be disconnected, the first switch S1 is closed, and the EC2 control keyboard of the keyboard KB is KB.
  • the fourth switch S4 is disconnected and the third switch S3 is closed, and the two are respectively charged.
  • the method may be adopted according to the manner provided in the first scheme or the second scheme. A charger is used to charge. In this way, the above five charging modes can be realized only by the connection between the tablet PAD and the keyboard KB through the first connector and the third connector, thereby improving the reliability of mutual charging of the devices and simplifying the connection structure between the devices.
  • the tablet PCD further includes: a first dead zone control circuit 53 and a first low dropout linear regulator LDO1;
  • the first input end of the first dead zone control circuit 53 is connected to the first charging interface Ch1, and the output end of the first dead zone control circuit 53 is connected to the first electronic controller CE1; the input end of the first low dropout linear regulator LDO1 Connecting the third end of the first charging circuit CI1, the output end of the first low-dropout linear regulator LDO1 is the second input end of the first dead zone control circuit 53; when the amount of the first battery Ba1 is less than or equal to the first threshold, When the first charging interface Ch1 is turned on, the charger that is turned on by the first charging interface Ch1 supplies power to the first electronic controller CE1 through the first dead zone control circuit 53; when the power of the first storage battery Ba1 is greater than the first threshold The first battery Ba1 is supplied with power to the first low-dropout linear regulator LDO1 through the first charging circuit CI, and the first low-dropout linear regulator LDO1 is supplied to the first electronic controller CE1 through the first dead zone control circuit 53. Electricity.
  • the keyboard KB further includes: a second dead zone control circuit 54 and a second low dropout linear regulator LDO2; the first input terminal of the second dead zone control circuit 54 is connected to the second charging interface Ch2
  • the output end of the second dead zone control circuit 54 is connected to the second electronic controller EC2; the input end of the second low dropout linear regulator LDO2 is connected to the third end of the second charging circuit CI2, and the second low dropout linear regulator
  • the output terminal of the LDO2 is connected to the second input terminal of the second dead zone control circuit 54; when the power of the second battery B2 is less than or equal to the second threshold, and the second charging interface Ch2 is turned on, the second charging interface Ch2 is turned on.
  • the charger is powered by the second dead zone control circuit 54 to the second electronic controller CE2; when the amount of the second battery Ba2 is greater than the second threshold, the second battery Ba2 is linearly stabilized by the second charging circuit CI2 to the second low voltage difference
  • the voltage regulator LDO2 supplies power, and the second low dropout linear regulator LDO2 supplies power to the second electronic controller EC2 through the second dead zone control circuit 54.
  • the first dead zone control circuit 53 includes a buck conversion BUCK circuit 531, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor.
  • the first end of the first resistor is connected to the first input end of the first dead zone control circuit, the second end of the first resistor is connected to the EN end of the BUCK circuit, and the second end of the first resistor is further passed through the second end.
  • the resistor is connected to the grounding end; the EN end of the BUCK circuit is further connected to the collector of the first triode, the emitter of the first triode is connected to the grounding end, and the base of the first triode is connected to the first end of the third resistor, The second end of the third resistor is connected to the second input end of the first dead zone control circuit, the second end of the third resistor is further connected to the first end of the fourth resistor; the output end of the BUCK circuit is connected to the drain of the first MOS transistor The source of the first MOS transistor is connected to the source of the second MOS transistor, and the gate of the first MOS transistor is grounded through the fifth resistor The second end of the fourth resistor is further connected to the gate of the first MOS transistor; the source of the second MOS transistor is connected to the gate of the second MOS transistor through the sixth resistor, and the source of the second MOS transistor is connected to the first dead An output end of the area control circuit, a gate of the second MOS transistor is further connected to the collector of
  • the second dead zone control circuit 54 of the keyboard KB has the same structure as the first dead zone control circuit 53 of the tablet PCD, as shown in the drawing, and will not be described again.
  • the tablet PCD further includes: a first Schottky diode SCK1 and a second Schottky diode SCK2; wherein an anode of the first Schottky diode SCK1 is connected to the first charging interface Ch1,
  • the cathode of the first Schottky diode SCK2 is connected to the cathode of the second Schottky diode SCK2, the anode of the second Schottky diode SCK2 is connected to the second end of the second switch S2; the cathode of the first Schottky diode SCK1 is also connected The first input of the first dead zone control circuit 53.
  • the working principle of the first dead zone control circuit 53 is as follows: In order to realize that the bare first charging interface Ch1 is not charged, the first switch S1 is in an off state by default. When the first battery is exhausted (the amount of the first battery is less than the first threshold), when the first charging interface Ch1 is inserted into the charger, the power cannot be transmitted to the battery. Because the first switch S1 requires EC1 control to switch between opening and closing, at this time, when the first battery Ba1 is exhausted, the EC1 cannot be normally powered, the system cannot be started, and the state of the first switch S1 cannot be changed.
  • the embodiment of the present application sets the first dead zone control circuit 53, as shown in FIG.
  • the first dead zone control circuit 53 when the first charge When the electrical interface Ch1 has a charger inserted, the first dead zone control circuit 53 is immediately activated to supply power to the EC1, the EC1 causes the first switch S1 to be closed, and the charger charges the first storage battery Ba1 through the first charging circuit CI1 to make the first The battery Ba1 recovers its power.
  • the operation of the second dead zone control circuit 53 on the keyboard KB is similar to that described above and will not be described again.
  • the purpose of setting the first dead zone control circuit 53 is to supply power to the EC1 and thereby close S1, so that the charger can supply power to the first battery Ba1.
  • the implementation process is:
  • the EN terminal is at a high level (the high level of the EN terminal of the BUCK circuit is enabled, the low level is not enabled), and the EN enables the BUCK circuit 531, and the current flows through the first XI.
  • the special base diode SCK1 supplies power to the BUCK circuit 531. M1 is turned on, M2 is turned off, and current flows to the EC1 through M1. After the EC1 is powered on, the S1 is turned on according to the above charging method.
  • the first charging circuit CI1 passed by the charger charges the first battery Ba1 and supplies power to the LDO1.
  • Q1 is turned on, so that the EN terminal is turned on with the ground GND, and the BUCK circuit 531 is turned off. M1.
  • the base of Q2 is electrically conductive, and the gate of M2 is turned on with the ground GND, and M2 is turned on.
  • the output voltage of LDO1 3.3Vsys1 sequentially supplies power to EC1 through M2.
  • M1 and M2 are PMOS tubes, and the voltage difference between GS (Gate/Source, gate/source) has a negative voltage to achieve conduction, and the voltage difference between GS is the same, that is, the shutdown is realized.
  • the GS voltage parasitic diode acts to prevent current backflow.
  • the tablet PCD further includes a first pair of side device in-position detecting circuit 55; the first pair of side in-position device in-position detecting circuit 55 is connected to the first electronic controller EC1 and the second connector Co2; and the second connector Co2 is used for connecting the keyboard
  • the ground terminal of the KB where the ground terminal of the keyboard KB is connected to the fourth connector Co4; when the second connector Co2 is connected to the fourth connector Co4, and the second connector Co2 is connected to the ground terminal of the keyboard KB, the first electron
  • the controller EC1 determines that the keyboard KB is in position according to the level of the second connector Co2.
  • the first pair device in-position detecting circuit 55 includes a tenth resistor R10 and an eleventh resistor R11; the first end of the tenth resistor R10 is connected to a power source VCC of a predetermined voltage value, and the tenth resistor R10 is The second end of the eleventh resistor R11 is connected to the ground end GND; the second end of the tenth resistor R10 is further connected to the first electronic controller EC1 and the second connector Co2.
  • R10 and R11 divide the power supply, and EC1 can detect the predetermined voltage value at the second end of the tenth resistor R10, and when the tablet PCD is connected to the keyboard KB.
  • the second end of the tenth resistor R10 is connected to the ground GND of the keyboard KB through a connector, and the EC1 can detect the zero potential at the second end of the tenth resistor R10, so that the EC1 can further notify the user that the connection is successful on the tablet PAD.
  • the keyboard KB also includes a second peer side device in-position detecting circuit 56, which functions the same as the first pair of side device in-position detecting circuit 55 on the tablet PAD, and is no longer Narration.
  • the EC1 of the PAD can push the PAD and the KB connection successfully to the user on the display interface of the PAD, and the EC2 of the KB can also drive the indicator light corresponding to the KB to prompt the user to successfully connect the KB and the PAD.
  • the first charging interface Ch1 is a USB interface
  • the first charging interface Ch1 further includes an identity ID pin, and the ID pin is connected to EC1; when the OTG transmission connector is inserted into the first charging interface Ch1, the EC1 is based on the level of the ID pin. It is determined that the first charging interface Ch1 has an OTG transmission connector insertion. And when the first charging interface Ch1 is inserted into the OTG transmission connector, the EC1 control S1 is turned off, avoiding collision with the charger voltage of the tablet PAD.
  • each of the above switches (S1, S2, S3, and S4) is as shown in FIG. 8, and includes: a third MOS transistor M3, a fourth MOS transistor M4, a twelfth resistor R12, a thirteenth resistor R13, and a third three-pole.
  • the drain of the third MOS transistor M3 is connected to the first end of the switch, the source of the third MOS transistor M3 is connected to the source of the fourth MOS transistor M4, and the drain of the fourth MOS transistor M4 is connected to the second end of the switch;
  • the source of the third MOS transistor M3 is also connected to the first end of the twelfth resistor R12, and the second end of the twelfth resistor R12 is connected to the gate of the third MOS transistor M3, the gate of the fourth MOS transistor M4, and the tenth a first end of the third resistor R13; a second end of the thirteenth resistor R13 is connected to the collector of the third transistor Q3, a base of the third transistor Q3 is connected to the control end of the switch, and the third transistor Q3 is The emitter is connected to the ground GND.
  • the above switches are back-to-back structures that prevent current backflow.
  • the tablet PAD further includes a first current limiting circuit 57, as shown in Figure 10, the current limiting pin of the first charging circuit CI1 is connected to the input terminal of the current limiting circuit, the control terminal of the first current limiting circuit 57 is connected to EC1;
  • the EC1 determines the charging power of the first storage battery Ba1 and the charging power of the second storage battery Ba2 according to the electric quantity of the first storage battery Ba1 and the electric quantity of the second storage battery Ba2, and the first electronic controller EC1 passes the first limit according to the charging power of the first storage battery Ba1.
  • the flow circuit 57 controls the current of the current limiting pin of the first charging circuit CI1, and transmits the charging power of the second battery Ba2 to the keyboard KB, wherein the charging power of the first battery Ba1 and the current limiting pin of the first charging circuit CI1 The current corresponds to.
  • the first current limiting circuit 57 includes: a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a fourth transistor Q4. The first end of the fourteenth resistor R14 is connected to the current limiting of the charging circuit 12.
  • the second end of the fourteenth resistor R14 is connected to the collector of the fourth transistor Q4; the first end of the fifteenth resistor R15 is connected to the current limiting pin of the charging circuit 12, and the second end of the fifteenth resistor R15
  • the grounding terminal GND is connected; the gate of the fourth transistor Q4 is connected to the control terminal of the first current limiting circuit 57 through the sixteenth resistor R16, and the emitter of the fourth transistor Q4 is connected to the grounding terminal GND.
  • the keyboard KB further includes a second current limiting circuit, the current limiting pin of the second charging circuit CI2 is connected to the input end of the current limiting circuit, the control end of the second current limiting circuit is connected to the EC2; and the EC2 is charged according to the charging of the second battery Ba2 sent by the EC1.
  • the power controls the current of the current limiting pin of the second charging circuit CI2 through the second current limiting circuit, wherein the charging power of the second charging circuit CI2 to the second battery Ba2 corresponds to the current of the current limiting pin.
  • the specific structure of the second current limiting circuit of the keyboard KB is the same as that of the first current limiting circuit 57 of the tablet PCD, and details are not described herein again.
  • the first charging circuit and/or the second charging circuit may adopt a BQ24x9x series charger (not shown in the peripheral circuit diagram), which includes a current limiting pin ILIM (as shown in FIG. 9).
  • a BQ24x9x series charger (not shown in the peripheral circuit diagram), which includes a current limiting pin ILIM (as shown in FIG. 9).
  • ILIM current limiting pin
  • the total power of the charger is 10W.
  • the tablet PAD is plugged into the charger, it can allocate 7.5W of power charging to itself based on the similar principle described above, and allocate 2.5W of power charging to the keyboard KB.
  • the tablet PCD further includes a first display module 58; when the first electronic controller EC1 determines that the first battery is in a charging state, the first display module 58 is controlled to display an identifier that the tablet PAD is in a charging state.
  • the first electronic controller EC1 determines that the first display module 58 is in the power supply state, and controls the first display module 58 to display the identifier that the PAD is in the power supply state; the first electronic controller EC1 determines that the second battery is in the charging state, and controls the first display module.
  • 58 indicates that the keyboard KB is in the charging state.
  • the first display module 58 is controlled to display the identifier that the keyboard KB is in the power supply state.
  • the tablet PCD displays the tablet PAD and the identifier of the charging state of the keyboard KB through the first display module 58 (for example, on the screen); as shown in FIG. 11-13.
  • the tablet PCD can display the identifier B1 of the tablet PAD in the charging state and the identifier B2 of the keyboard KB in the power supply state on the status bar of the screen, wherein The outlines of the displays B1 and B2 can be different to distinguish between the tablet PAD and the keyboard KB.
  • the tablet PAD when the first battery is charging the second battery, the tablet PAD can display the identifier B11 of the tablet PAD in the power supply state and the identifier B22 of the keyboard KB in the charging state on the status bar of the screen, where the display is displayed.
  • the outlines of B11 and B22 can be different to distinguish between tablet PCD and keyboard KB.
  • the tablet PAD can display the identifier B1 of the tablet PAD in the charging state on the status bar of the screen, and the keyboard KB is in the state.
  • the identification of the state of charge B22, wherein the profiles of the displays B1 and B22 can be different to distinguish the tablet PAD from the keyboard KB.
  • the tablet PAD can display the identifier B1 of the tablet PAD in the charging state on the status bar of the screen, and the keyboard KB is in the state.
  • the identification of the state of charge B22 wherein the profiles of the displays B1 and B22 can be different to distinguish the tablet PAD from the keyboard KB.
  • the tablet PAD can display the tablet on the status bar of the screen.
  • the keyboard KB further includes a second display module 59; when the second electronic controller EC2 determines that the first battery is in the charging state, the second display module 59 is controlled to display the identifier of the tablet PAD in the charging state.
  • the second display module 59 controls the identifier of the tablet PC to be in the power supply state; and the second electronic controller EC2 determines that the second battery is in the charging state, and controls the second display.
  • the module 59 displays the identifier of the keyboard KB in the charging state, and the second electronic controller EC2 determines that the second display module 59 displays the identifier that the keyboard KB is in the power supply state when the second battery is in the power supply state.
  • peripheral devices such as the keyboard KB are usually lower cost products. If it includes a screen for displaying an image, the tablet PAD can be displayed on the screen such as the tablet PAD and the power state or state of charge of the keyboard KB. If the keyboard KB does not include a screen for displaying an image, it can pass different colors. The indicator light, or a different indicator on the keyboard, identifies the power state or state of charge of the tablet PAD and the keyboard KB.
  • an embodiment of the present application provides a charging control method, including the following steps:
  • the mobile terminal determines a charging mode according to a power quantity of the first battery of the mobile terminal and a power quantity of the second battery of the peripheral device.
  • the step 101 specifically includes: the mobile terminal determines that the first battery of the mobile terminal is lower than the third threshold, and determines that the charging mode is that the second battery is charging the first battery; or the mobile terminal determines the second battery of the peripheral device.
  • the battery is lower and lower than the fourth threshold, and it is determined that the charging mode is that the first battery is charging the second battery.
  • the charging method includes: the first battery is charging the second battery of the peripheral device, or the second battery is charging the first battery.
  • the mobile terminal determines that the power of the first battery is lower than the fifth threshold, the mobile terminal controls the second switch to be turned off, and sends a stop charging control command to the peripheral device.
  • the peripheral device receives the stop charging control command sent by the mobile terminal, and controls the fourth switch to be turned off according to the stop charging control command.
  • the mobile terminal determines that the power of the second battery is lower than the sixth threshold, the mobile terminal controls the second switch to be turned off, and sends a stop power supply control command to the peripheral device.
  • the peripheral device receives the stop power supply control command sent by the mobile terminal, and controls the fourth switch to be turned off according to the stop power supply control command.
  • the method for determining the charging mode further includes: determining, by the mobile terminal, whether the first charging interface is based on the sampling voltage of the first charging interface of the mobile terminal
  • the charging terminal is configured to: when the mobile terminal determines that the first charging interface of the mobile terminal has the charger turned on and/or the second charging interface of the peripheral device has the charger turned on, the charging mode is re-determined, and the charging manner further includes: The charger connected to the charging interface charges the first battery and the second battery, or the charger connected to the second charging interface of the peripheral device charges the first battery and the second battery, or the charger connected to the first charging interface is the first The battery and the charger connected to the second charging interface charge the second battery.
  • the charger connected to the first charging interface charges the first battery and the second battery
  • the charger connected to the second charging interface is in the process of charging and charging the first battery and the second battery
  • the mobile terminal is moving according to the mobile terminal
  • the power of the first battery of the terminal and the power of the second battery of the peripheral device determine the charging power of the first battery and the charging power of the second battery, and transmit the charging power of the second battery to the peripheral device.
  • the peripheral device performs charging power control according to the charging power of the second battery.
  • the mobile terminal controls states of the first switch and the second switch according to the charging mode, and sends control information to the peripheral device to notify the peripheral device of the charging mode.
  • the peripheral device determines a charging mode according to the control information sent by the mobile terminal.
  • the peripheral device controls states of the third switch and the fourth switch according to the charging manner, where the charging manner includes: the second battery is charging the first battery, or the first battery is charging the second battery.
  • the charging method further includes: charging the first battery and the second battery by the charger connected to the first charging interface
  • the charger connected to the second charging interface of the peripheral device charges the first battery and the second battery, or the charger connected to the first charging interface is the first battery and the charger connected to the second charging interface charges the second battery .
  • the mobile terminal controls the states of the first switch and the second switch according to the charging mode, and the description of the embodiment of the state reference device that controls the third switch and the fourth switch according to the charging mode, and details are not described herein again.
  • the mobile terminal when the mobile terminal determines that the first storage battery is in the charging state, the mobile terminal displays an identifier of the charging state, and the mobile terminal determines that the first storage battery is in the power supply state, and displays the identifier that the mobile terminal is in the power supply state; the mobile terminal determines When the second storage battery is in the charging state, the identifier indicating that the peripheral device is in the charging state is displayed, and when the mobile terminal determines that the second storage battery is in the power supply state, the identifier indicating that the peripheral device is in the power supply state is displayed.
  • the peripheral device determines that the first battery is in the charging state, displaying the identifier that the mobile terminal is in the charging state, and the peripheral device determines that the first battery is in the power supply state, displaying the identifier that the mobile terminal is in the power supply state; and the peripheral device determines that the second battery is in the charging state
  • the indicator that the peripheral device is in the charging state is displayed, and the peripheral device determines that the second battery is in the power supply state, and displays the identifier that the peripheral device is in the power supply state.
  • the embodiment of the present application provides a specific charging control logic:
  • the EC1 of the tablet PCD confirms that the keyboard KB is in position by detecting the second end of the tenth resistor R10 of the bit detection circuit of the opposite side electronic device;
  • the EC of KB confirms that the tablet PAD is in place by detecting the second potential of the tenth resistor R10 of the in-position electronic device in the bit detection circuit, and reports the EC1 of the tablet.
  • the EC1 of the tablet PCD detects the power of the first battery Ba1 through the first charging circuit CI1
  • the EC2 of the keyboard KB detects the power of the second battery Ba2 through the second charging circuit CI2
  • the EC1 of the tablet PAD is USB and the keyboard KB.
  • the EC1 of the tablet PAD acquires the EC2 of the keyboard KB to detect the amount of power of the second battery Ba2, and with reference to Fig. 14, EC1 performs charging control:
  • the first threshold can be configured to any value, of course, usually a lower value, such as 5%, is intended to charge the tablet when it is determined that the remaining power of the tablet is low.
  • step S02 The specific manner of determining whether the tablet is in place in step S02 is not described herein again with reference to the above description.
  • Charging path 1 is: Charger -> Tablet PC PAD USB interface -> Tablet PC PAD first switch S1-> Tablet PC PAD first charging circuit CI1-> Tablet PC PAD first battery Ba1 ;
  • Charging path 2 is: charger -> tablet PC PAD USB interface -> tablet PC PAD first switch S1-> tablet PC PAD second switch S2-> keyboard KB fourth switch S4-> keyboard The second charging circuit of the KB, Ch2-> the second battery Ba2 of the keyboard KB.
  • the current limiting circuit can be used to allocate charging power for charging the battery to the tablet and the keyboard.
  • the second threshold can be configured to any value, of course, usually a lower value, such as 5%, is intended to charge the keyboard when it is determined that the remaining capacity of the keyboard is low.
  • the charger for controlling the keyboard charges the Ba1 of the tablet and the Ba2 of the keyboard until both are full.
  • the second switch S2 of the tablet PAD of the tablet PAD is closed, the first switch S1 of the tablet PAD of the tablet PAD is disconnected, and the EC2 of the keyboard KB is controlled by the keyboard KB
  • the third switch S3 and the fourth switch S4 are closed, and the charger of the keyboard charges the Ba1 of the tablet computer and the Ba2 of the keyboard through the following two paths:
  • the charging path 1 is: charger-> keyboard KB USB interface-> keyboard KB third switch S3-> keyboard KB second charging circuit Ch2-> keyboard KB second battery Ba2;
  • Charging path 2 is: charger -> keyboard KB USB interface -> keyboard KB third switch S3-> keyboard KB fourth switch S4-> tablet PC PAD second switch S2-> tablet PC PAD The first charging circuit Ch1-> the first battery Ba1 of the PAD of the tablet.
  • the charging power of the battery can be allocated to the tablet and the keyboard through the current limiting circuit of the keyboard during the charging process.
  • step S09 If it is determined that the power of the tablet of the tablet is higher than the power of the Ba2 of the keyboard, the Ba1 of the tablet is controlled to charge the Ba2 of the keyboard; if it is determined that the amount of the Ba2 of the keyboard is higher than the amount of the Ba1 of the tablet, Then the Ba2 controlling the keyboard charges the Ba1 of the tablet. And step S01 is continued in the process of S09.
  • control logic is implemented based on the basic functions of the various structures of the device provided by the embodiment of the present application. Of course, other control logics that can be implemented according to the device provided by the embodiment of the present application are also applicable to the present application. The scope of protection.

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Abstract

本申请实施例公开了一种移动终端、外围设备及其充电方法，涉及电子设备技术领域，移动终端和外围设备可以独立供电并且当移动终端和外围设备通过连接器连接时可以实现相互充电，提高了移动终端和外围设备配合使用时的续航能力。移动终端，包括:第一开关、第二开关、第一充电接口、第一充电电路、第一连接器、第一蓄电池和第一电子控制器。

Description

移动终端、外围设备及其充电方法 技术领域
本申请涉及电子设备技术领域，尤其涉及移动终端、外围设备及其充电方法。
背景技术
目前，平板电脑通过内置锂电池给系统供电，由于市面上的平板电脑趋于轻薄化的发展趋势。受空间限制，一般平板的电池容量有限(约4000～6000mAh)，加上屏幕大，功耗大，使用时间通常为4～6小时，用户外出时，经常要多携带一个充电宝，续航力仍难以有效地获得提升。而采用电源适配器来连接交流电源，则会使得便携性大打折扣。平板电脑用户在进行轻办公时，如使用office(办公)软件进行办公时，平板内置虚拟键盘，占用了屏幕显示的空间。如果搭配外置键盘，进行字符输入等操作，更利于用户工作使用。这种二合一笔记本有较好的发展前景。然而，现有技术中二合一笔记本在续航能力上仍然有待提升。
发明内容
本申请的实施例提供移动终端、外围设备及其充电方法，移动终端和外围设备可以独立供电并且当移动终端和外围设备通过连接器连接时可以实现相互充电，提高了移动终端和外围设备配合使用时的续航能力。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，提供一种电子设备，一种移动终端，包括:第一开关、第二开关、第一充电接口、第一充电电路、第一连接器、第一蓄电池和第一电子控制器；第一开关的第一端连接第一充电接口，第一开关的第二端连接第一充电电路的第一端；第二开关的第一端连接第一充电电路的第一端，第二开关的第二端连接第一连接器；第一充电电路的第二端与第一蓄电池连接，用于控制第一蓄电池的充电过程；第一连接器用于连接外围设备；第一电子控制器与第一开关的控制端以及第二开关的控制端连接，并与外围设备通信；第一电子控制器用于根据第一蓄电池的电量和外围设备的第二蓄电池的电量确定充电方式，根据充电方式控制第一开关和第二开关的状态，并向外围设备发送控制信息以向外围设备通知充电方式，充电方式包括：第一蓄电池为第二蓄电池充电，或第二蓄电池为第一蓄电池充电。在该方案中，移动终端和外围设备可以独立供电并且当移动终端和外围设备通过连接器连接时可以实现相互充电，提高了移动终端和外围设备配合使用时的续航能力，丰富了产品功能，提升了产品竞争力。
一种示例性的实现方式中，移动终端还包括：第一死区控制电路和第一低压差线性稳压器，第一死区控制电路的第一输入端连接至第一充电接口，第一死区控制电路的输出端连接第一电子控制器；第一低压差线性稳压器的输入端连接第一充电电路的第三端，第一低压差线性稳压器的输出端第一死区控制电路的第二输入端；当第一蓄电池的电量小于等于第一阈值时，并且第一充电接口接通充电器时，第一充电接口接通的充电器通过第一死区控制电路向第一电子控制器供电；当第一蓄电池的电量大于 第一阈值时，第一蓄电池通过第一充电电路向第一低压差线性稳压器供电，第一低压差线性稳压器通过第一死区控制电路向第一电子控制器供电。这样，可以实现第一开关的常态为断开状态，因此能够实现移动终端的第一充电接口未插入充电器时，移动终端的第一充电接口与内部电路隔离，同时移动终端在正常工作状态时裸露的第一充电接口不带电。由于第一开关的控制和第二开关的控制需要第一电子控制器正常供电，当第一蓄电池的电量处于低电状态时，不能为第一电子控制器正常供电，若第一开关处于断开状态，即使第一充电接口连通充电器也不能通过第一开关为第一蓄电池充电，以为第一电子控制器正常供电。这里第一死区控制电路提供了一条为第一电子控制器正常供电的通路，进而使得第一蓄电池的电量处于低电状态时，若第一充电接口连通充电器，能够使得第一电子控制器正常供电，进而控制第一开关闭合为第一蓄电池充电。
一种实例性的实现方式中，第一死区控制电路包括：降压式变换BUCK电路、第一电阻、第二电阻、第三电阻、第四电阻、第五电阻、第六电阻、第七电阻、第一三极管、第二三极管、第一MOS(Metal-Oxide-Semiconductor，金属-氧化物-半导体)管以及第二MOS管；其中，BUCK电路的输入端连接第一死区控制电路的第一输入端，第一电阻的第一端连接第一死区控制电路的第一输入端，第一电阻的第二端连接BUCK电路的使能EN(Enable)端，第一电阻的第二端还通过第二电阻连接接地端；BUCK电路的EN端还连接第一三极管的集电极，第一三极管的发射极连接接地端，第一三极管的基极连接第三电阻的第一端，第三电阻的第二端连接第一死区控制电路的第二输入端，第三电阻的第二端还连接第四电阻的第一端；BUCK电路的输出端连接第一MOS管的漏极，第一MOS管的源极连接第二MOS管的源极，第一MOS管的栅极通过第五电阻连接接地端，第四电阻的第二端还连接第一MOS管的栅极；第二MOS管的源极通过第六电阻连接第二MOS管的栅极，第二MOS管的源极连接第一死区控制电路的输出端，第二MOS管的栅极还连接第二三极管的集电极，第二MOS管的漏极连接第一死区控制电路的第二输入端，第二三极管的基极通过第七电阻连接第一死区控制电路的第二输入端。
一种示例性的实现方式中，还包括第一肖特基二极管和第二肖特基二极管；其中，第一肖特基二极管的阳极连接第一充电接口，第一肖特基二极管的阴极连接第二肖特基二极管的阴极，第二肖特基二极管的阳极连接第二开关的第二端；第一肖特基二极管的阴极还连接第一死区控制电路的第一输入端。
一种示例性的实现方式中，移动终端还包括充电器在位检测电路，充电器在位检测电路连接第一充电接口以及第一电子控制器；其中，充电器在位检测电路用于获取第一充电接口的采样电压，第一电子控制器用于根据采样电压确定第一充电接口是否有充电器接通；当第一电子控制器确定第一充电接口有充电器接通和/或外围设备的第二充电接口有充电器接通时，第一电子控制器还用于重新确定充电方式，充电方式还包括：第一充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或第二充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或第一充电接口连接的充电器为第一蓄电池并且第二充电接口连接的充电器为第二蓄电池充电。其中，充电器在位检测电路包括第八电阻和第九电阻；第八电阻的第一端连接第一充电接口，第八电阻的第二 端连接第九电阻的第一端，第九电阻的第二端连接接地端；第九电阻的第一端连接第一电子控制器；第一电子控制器用于获取第九电阻的第一端的采样电压，并根据采样电压确定充电接口是否有充电器接通。
一种示例性的实现方式中，移动终端还包括对侧设备在位检测电路；对侧设备在位检测电路连接第一电子控制器以及第二连接器；第二连接器用于连接对侧设备的接地端；当第二连接器连接对侧设备的接地端时，第一电子控制器根据第二连接器的电平确定对侧设备在位。其中，对侧设备在位检测电路包括第十电阻和第十一电阻；第十电阻的第一端连接预定电压值的电源，第十电阻的第二端连接第十一电阻的第一端，第十一电阻的第二端连接接地端；第十电阻的第二端还连接第一电子控制器以及第二连接器。
一种示例性的实现方式中，第一充电接口为USB(Universal Serial Bus，通用串行总线)接口，第一充电接口包括身份ID(identification)引脚，ID引脚连接第一电子控制器；当OTG(On-The-Go)传输接头插入充电接口时，第一电子控制器用于根据ID引脚的电平确定第一充电接口是否有OTG传输接头插入。
一种示例性的实现方式中，第一开关和/或第二开关包括：第三MOS管、第四MOS管、第十二电阻、第十三电阻和第三三极管；第三MOS管的源极连接第四MOS管的源极；第三MOS管的源极还连接第十二电阻的第一端，第十二电阻的第二端连接第三MOS管的栅极、第四MOS管的栅极以及第十三电阻的第一端；第十三电阻的第二端连接第三三极管的集电极，第三三极管的发射极连接接地端；第三MOS管、第四MOS管、第十二电阻、第十三电阻和第三三极管组成第一开关时，第三MOS管的漏极连接第一开关的第一端，第四MOS管的漏极连接第一开关的第二端，第三三极管的基极连接第一开关的控制端；第三MOS管、第四MOS管、第十二电阻、第十三电阻和第三三极管组成第二开关时，第三MOS管的漏极连接第二开关的第一端，第四MOS管的漏极连接第二开关的第二端，第三三极管的基极连接第二开关的控制端。
一种示例性的实现方式中，还包括限流电路，第一充电电路的限流引脚连接限流电路的输入端，限流电路的控制端连接第一电子控制器；第一电子控制器根据第一蓄电池的电量以及第二蓄电池的电量确定第一蓄电池的充电功率以及第二蓄电池的充电功率，第一电子控制器根据第一蓄电池的充电功率通过限流电路控制第一充电电路的限流引脚的电流，并将第二蓄电池的充电功率发送至外围设备，其中第一充电电路对第一蓄电池的充电功率与限流引脚的电流对应。其中，限流电路包括：第十四电阻、第十五电阻、第十六电阻以及第四三极管；第十四电阻的第一端连接第一充电电路的限流引脚，第十四电阻的第二端连接第四三极管的集电极；第十五电阻的第一端连接第一充电电路的限流引脚，第十五电阻的第二端连接接地端；第四三极管的栅极通过第十六电阻连接限流电路的控制端，第四三极管的发射极连接接地端。
一种示例性的实现方式中，还包括第一显示模块；第一电子控制器确定第一蓄电池处于充电状态时，控制第一显示模块显示移动终端处于充电状态的标识，第一电子控制器确定第一蓄电池处于供电状态时，控制第一显示模块显示移动终端处于供电状态的标识；第一电子控制器确定第二蓄电池处于充电状态时，控制第一显示模块显示 外围设备处于充电状态的标识，第一电子控制器确定第二蓄电池处于供电状态时，控制第一显示模块显示外围设备处于供电状态的标识。
一种示例性的实现方式中，第一电子控制器具体用于确定移动终端的第一蓄电池的电量较低且低于第三阈值，则确定充电方式为第二蓄电池为第一蓄电池充电；第一电子控制器具体用于确定外围设备的第二蓄电池的电量较低且低于第四阈值，则确定充电方式为第一蓄电池为第二蓄电池充电。
一种示例性的实现方式中，当第一蓄电池为第二蓄电池充电时，若第一电子控制器确定第一蓄电池的电量低于第五阈值，则第一电子控制器用于控制第二开关断开，并向外围设备发送停止充电控制指令。
一种示例性的实现方式中，当第二蓄电池为第一蓄电池充电时，若第一电子控制器确定第二蓄电池的电量低于第六阈值，则第一电子控制器用于控制第二开关断开，并向外围设备发送停止供电控制指令。
一种示例性的实现方式中，第一连接器为pogo pin弹簧顶针连接器。
第二方面，提供一种外围设备，包括第三开关、第四开关、第二充电接口、第二充电电路、第三连接器、第二蓄电池和第二电子控制器；第三开关的第一端连接第二充电接口，第三开关的第二端连接和第二充电电路的第一端；第四开关的第一端连接第二充电电路的第一端，第四开关的第二端连接第三连接器；第二充电电路的第二端与第二蓄电池连接，用于控制第二蓄电池的充电过程；第三连接器用于连接移动终端；第二电子控制器与第三开关的控制端以及第四开关的控制端连接，并与移动终端通信；第二电子控制器用于根据移动终端发送的控制信息确定充电方式，并根据充电方式控制第三开关和第四开关的状态，充电方式包括：第二蓄电池为第一蓄电池充电，或第一蓄电池为第二蓄电池充电。在该方案中，移动终端和外围设备可以独立供电并且当移动终端和外围设备通过连接器连接时可以实现相互充电，提高了移动终端和外围设备配合使用时的续航能力，丰富了产品功能，提升了产品竞争力。
一种示例性的实现方式中，外围设备还包括：第二死区控制电路和第二低压差线性稳压器；第二死区控制电路的第一输入端连接至第二充电接口，第二死区控制电路的输出端连接第二电子控制器；第二低压差线性稳压器的输入端连接第二充电电路的第三端，第二低压差线性稳压器的输出端第二死区控制电路的第二输入端；当第二蓄电池的电量小于等于第二阈值时，并且第二充电接口接通充电器时，第二充电接口接通的充电器通过第二死区控制电路向第二电子控制器供电；当第二蓄电池的电量大于第二阈值时，第二蓄电池通过第二充电电路向第二低压差线性稳压器供电，第二低压差线性稳压器通过第二死区控制电路向第二电子控制器供电。这样，可以实现第三开关的常态为断开状态，因此能够实现移动终端的第二充电接口未插入充电器时，移动终端的第二充电接口与内部电路隔离，同时移动终端在正常工作状态时裸露的第二充电接口不带电。由于第三开关的控制和第四开关的控制需要第二电子控制器正常供电，当第二蓄电池的电量处于低电状态时，不能为第二电子控制器正常供电，若第三开关处于断开状态，即使第二充电接口连通充电器也不能通过第三开关正常为第二蓄电池充电，以为第二电子控制器正常供电。这里第二死区控制电路提供了一条为第二电子控制器正常供电的通路，进而使得第二蓄电池的电量处于低电状态时，若第二充电接 口连通充电器，能够使得第二电子控制器正常供电，进而控制第三开关闭合为第二蓄电池充电。
一种示例性的实现方式中，还包括第二显示模块；第二电子控制器确定第一蓄电池处于充电状态时，控制第二显示模块显示移动终端处于充电状态的标识，第二电子控制器确定第一蓄电池处于供电状态时，控制第二显示模块显示移动终端处于供电状态的标识；第二电子控制器确定第二蓄电池处于充电状态时，控制第二显示模块显示外围设备处于充电状态的标识，第二电子控制器确定第二蓄电池处于供电状态时，控制第二显示模块显示外围设备处于供电状态的标识。
一种示例性的实现方式中，第二电子控制器还用于接收移动终端发送的停止充电控制指令，并根据停止充电控制指令控制第四开关断开。
一种示例性的实现方式中，第二电子控制器还用于接收移动终端发送的停止供电控制指令，并根据停止供电控制指令控制第四开关断开。
第三方面，提供一种移动终端的充电方法，包括如下步骤：移动终端根据移动终端的第一蓄电池的电量和外围设备的第二蓄电池的电量确定充电方式；移动终端根据充电方式控制第一开关和第二开关的状态，并向外围设备发送控制信息以向外围设备通知充电方式，充电方式包括：第一蓄电池为外围设备的第二蓄电池充电，或第二蓄电池为第一蓄电池充电。在该方案中，移动终端和外围设备可以独立供电并且当移动终端和外围设备通过连接器连接时可以实现相互充电，提高了移动终端和外围设备配合使用时的续航能力，丰富了产品功能，提升了产品竞争力。
一种示例性的实现方式中，移动终端根据移动终端的第一充电接口的采样电压确定第一充电接口是否有充电器接通；移动终端确定移动终端的第一充电接口有充电器接通和/或外围设备的第二充电接口有充电器接通时，重新确定充电方式，充电方式还包括：第一充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或外围设备的第二充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或第一充电接口连接的充电器为第一蓄电池并且第二充电接口连接的充电器为第二蓄电池充电。
一种示例性的实现方式中，移动终端根据移动终端的第一蓄电池的电量与外围设备的第二蓄电池的电量，确定第一蓄电池的充电功率以及第二蓄电池的充电功率，并将第二蓄电池的充电功率发送至外围设备。
一种示例性的实现方式中，方法还包括：移动终端确定第一蓄电池处于充电状态时，显示移动终端处于充电状态的标识，移动终端确定确定第一蓄电池处于供电状态时，显示移动终端处于供电状态的标识；移动终端确定第二蓄电池处于充电状态时，显示外围设备处于充电状态的标识，移动终端确定第二蓄电池处于供电状态时，显示外围设备处于供电状态的标识。
一种示例性的实现方式中，移动终端根据移动终端的第一蓄电池的电量和外围设备的第二蓄电池的电量确定充电方式，包括：移动终端确定移动终端的第一蓄电池的电量较低且低于第三阈值，则确定充电方式为第二蓄电池为第一蓄电池充电；或者，
移动终端确定外围设备的第二蓄电池的电量较低且低于第四阈值，则确定充电方式为第一蓄电池为第二蓄电池充电。
一种示例性的实现方式中，当第一蓄电池为第二蓄电池充电时，若移动终端确定 第一蓄电池的电量低于第五阈值，则移动终端控制第二开关断开，并向外围设备发送停止充电控制指令。
一种示例性的实现方式中，当第二蓄电池为第一蓄电池充电时，若移动终端确定第二蓄电池的电量低于第六阈值，则移动终端控制第二开关断开，并向外围设备发送停止供电控制指令。
第四方面，提供一种外围设备的充电方法，包括：外围设备根据移动终端发送的控制信息确定充电方式；外围设备根据充电方式控制第三开关和第四开关的状态，充电方式包括：第二蓄电池为第一蓄电池充电，或第一蓄电池为第二蓄电池充电。在该方案中，移动终端和外围设备可以独立供电并且当移动终端和外围设备通过连接器连接时可以实现相互充电，提高了移动终端和外围设备配合使用时的续航能力，丰富了产品功能，提升了产品竞争力。
一种示例性的实现方式中，外围设备确定第一蓄电池处于充电状态时，显示移动终端处于充电状态的标识，外围设备确定第一蓄电池处于供电状态时，显示移动终端处于供电状态的标识；外围设备确定第二蓄电池处于充电状态时，显示外围设备处于充电状态的标识，外围设备确定第二蓄电池处于供电状态时，显示外围设备处于供电状态的标识。
一种示例性的实现方式中，外围设备接收移动终端发送的停止充电控制指令，并根据停止充电控制指令控制第四开关断开。
一种示例性的实现方式中，外围设备接收移动终端发送的停止供电控制指令，并根据停止供电控制指令控制第四开关断开。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍。
图1为本申请的实施例提供的一种应用场景的示意图；
图2为本申请的实施例提供的另一应用场景的示意图；
图3为本申请的实施例提供的一种连接器的连接方式示意图；
图4为本申请的实施例提供的一种移动终端和外围设备的结构示意图；
图5为本申请的另一实施例提供的一种移动终端和外围设备的结构示意图；
图6为本申请的又一实施例提供的一种移动终端和外围设备的结构示意图；
图7为本申请的再一实施例提供的一种移动终端的结构示意图；
图8为本申请的实施例提供的一种开关的结构示意图；
图9为本申请的实施例提供的一种第一充电电路采用的charger芯片的结构示意图；
图10为本申请的实施例提供的一种第一限流电路的结构示意图；
图11为本申请的实施例提供的一种移动终端上的显示界面示意图；
图12为本申请的另一实施例提供的一种移动终端上的显示界面示意图；
图13为本申请的又一实施例提供的一种移动终端上的显示界面示意图；
图14为本申请的实施例提供的一种充电控制逻辑示意图。
具体实施方式
下面结合附图，对本申请的实施例进行描述。
本申请的实施例涉及移动终端以及移动终端的外围设备，移动终端可以包括手机、平板电脑、PDA(Personal Digital Assistant，个人数字助理)、POS(Point of Sales，销售终端)、车载电脑等。移动终端可以包括、RF(Radio Frequency，射频)电路、存储器、其他输入设备、显示屏、传感器、音频电路、I/O子系统、处理器、充电管理芯片和电源管理芯片等部件。移动终端还可以包括摄像头、蓝牙模块、虚拟按键、实体按键等部件，在此不再赘述。本领域技术人员可以理解，上述移动终端的结构并不构成限定，可以包括更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。本领领域技术人员可以理解显示屏属于用户界面(UI，User Interface)，且手机可以包括比图示或者更少的用户界面。移动终端工作过程中，移动终端中的蓄电池可以为以上部件进行供电。外围设备可以是：键盘、扩展坞、VR(Virtual Reality，虚拟现实)眼镜等，外围设备也具有蓄电池，外围设备中的蓄电池可以为外围设备进行供电。
在本申请实施例中，提供的移动终端及其外围设备均包含蓄电池，并且移动终端及其外围设备连接时，在一种示例中，移动终端的第一蓄电池可以为外围设备的第二蓄电池充电；在另一种示例中，外围设备的第二蓄电池可以为移动终端的第一蓄电池充电。此外，当移动终端连接充电器时，还可以通过移动终端连接的充电器同时为移动终端的第一蓄电池以及外围设备的第二蓄电池充电，当然当外围设备连接充电器时，还可以通过外围设备连接的充电器同时为移动终端的第一蓄电池以及外围设备的第二蓄电池充电。另外，移动终端和外围设备也可以独自连接充电器，为各自的蓄电池充电。
在以下实施例中，可以以移动终端为平板电脑，外围设备为键盘为例进行详细说明，满足平板电脑对续航能力日益提高的要求。应当能够理解的是，其他移动终端和外围设备之间，例如手机和扩展坞，也可以应用于本申请实施例的使用场景。
在一种实现方式中，键盘采用无线键盘，无线键盘和平板电脑需要单独设置电源，独立供电，当其中之一电量耗尽时，便不能继续使用。在另一种现有方式中，是键盘由平板电脑供电，该方式中，键盘只能在两者连接在一起才能使用，无法分体操作易用性大大折扣。而本申请中，本申请的实施例提供的移动终端和外围设备可以独立供电，并且当两个设备(例如平板电脑和键盘)通过硬件连接器连接时可以实现相互充电。
具体的，本申请的实施例具体通过平板电脑PAD和键盘KB之间的相互作用进行说明。具体参照图1所示，本申请的应用场景可以为：平板电脑PAD可以与键盘KB分体使用，其中平板电脑PAD和键盘KB均内置电源(蓄电池)，在分体使用时，平板电脑PAD与键盘KB可以通过无线信号通信。此外，参照图2所示，平板电脑PAD和键盘KB也可以组合使用，组合使用时平板电脑PAD与键盘KB通过硬件连接器(pogo pin连接器11和电极盘12)电连接并进行通信，本申请中平板电脑PAD和键盘KB可以通过pogo pin连接器电连接。其中，平板电脑PAD上设置的连接器为pogo pin连接器时，键盘KB上设置的连接器为电极盘，或者键 盘KB上设置的连接器为pogo pin连接器时，平板电脑PAD上设置的连接器为电极盘。在图1提供的示例中，键盘KB上设置的连接器为pogo pin连接器11，平板电脑PAD上设置的连接器为电极盘12。如图2所示，当平板电脑PAD与键盘KB以某种位置关系吸附在一起时，pogo pin连接器与对应的电极盘电连接，使得平板电脑PAD与键盘KB形成连接关系；其中，如图3所示，该方案中pogo pin是一种由针轴a、弹簧b、针管c三个基本部件通过精密仪器铆压预压之后形成的弹簧式探针，其内部有一个精密的弹簧结构，pogo pin具有良好的防腐蚀性、稳定性、耐久性。其中，pogo pin连接器Co1与对应的电极盘Co2电连接指弹簧式探针的头部压迫接触电极板，并能够使得平板电脑PAD与键盘KB通过电极盘与pogo pin连接器形成的连接关系进行信号传输，当然该信号不限于：电流信号、电压信号、数据信号等等。
参照图4所示，本申请的实施例提供的移动终端10包括：第一开关S1、第二开关S2、第一充电接口Ch1、第一充电电路CI1、第一连接器Co1、第一蓄电池Ba1和第一电子控制器EC1。
其中，上述移动终端10包括的各个结构连接关系如下：
第一开关S1的第一端连接第一充电接口Ch1，第一开关S1的第二端连接第一充电电路CI1的第一端；第二开关S2的第一端连接第一充电电路CI1的第一端，第二开关S2的第二端连接第一连接器Co1；第一充电电路CI1的第二端与第一蓄电池Ba1连接，用于控制第一蓄电池Ba1的充电过程；第一连接器Co1用于连接外围设备20；第一电子控制器EC1与第一开关S1的控制端Ko1以及第二开关S2的控制端Ko2连接，并与外围设备20通信。
参照图4所示，本申请的实施例提供的外围设备20包括第三开关S3、第四开关S4、第二充电接口Ch2、第二充电电路CI2、第三连接器Co3、第二蓄电池Ba2和第二电子控制器EC2。
其中，上述外围设备20包括的各个结构连接关系如下：
第三开关S3的第一端连接第二充电接口Ch2，第三开关S3的第二端连接和第二充电电路CI2的第一端；第四开关S4的第一端连接第二充电电路CI2的第一端，第四开关S4的第二端连接第三连接器Co3；第二充电电路CI2的第二端与第二蓄电池Ba2连接，用于控制第二蓄电池Ba2的充电过程；第三连接器Co3用于连接移动终端10；第二电子控制器EC2与第三开关S3的控制端Ko3以及第四开关S4的控制端Ko4连接，并与移动终端10通信。
在功能上，第一电子控制器EC1用于根据第一蓄电池Ba1的电量和外围设备20的第二蓄电池Ba2的电量确定充电方式，根据充电方式控制第一开关S1和第二开关S2的状态，并向外围设备20发送控制信息以向外围设备20通知充电方式；第二电子控制器EC2用于根据移动终端10发送的控制信息确定充电方式，并根据充电方式控制第三开关S3和第四开关S4的状态。充电方式包括：第一蓄电池Ba1为第二蓄电池Ba2充电，或第二蓄电池Ba2为第一蓄电池Ba1充电。
在应用于如上述图2所示的场景中时，如图4所示，平板电脑PAD的第一连接器Co1与键盘KB的第三连接器Co3电连接；平板电脑PAD的第二开关S2的第 二端与键盘KB的第四开关S4的第二端电连接，其中，充电方式采用第一蓄电池Ba1为第二蓄电池Ba2充电时，第一电子控制器EC1根据充电方式控制平板电脑PAD的第二开关S2闭合，并且第二电子控制器EC2根据充电方式控制键盘KB的第四开关S4闭合；同理，充电方式采用第二蓄电池Ba2为第一蓄电池Ba1充电时，第一电子控制器EC1根据充电方式控制平板电脑PAD的第二开关S2闭合，并且第二电子控制器EC2根据充电方式控制键盘KB的第四开关S4闭合。
在平板电脑PAD和键盘KB均不使用充电器的情况下：平板电脑PAD的第一电子控制器EC1控制平板电脑PAD的第一开关S1断开，键盘KB的第一电子控制器EC1控制键盘KB的第三开关S3断开。这样可以避免第一充电接口Ch1以及第二充电接口Ch2带电。
第一蓄电池Ba1为第二蓄电池Ba2充电的路径为：第一蓄电池Ba1->第一充电电路CI1->第二开关S2->第四开关S4->第二充电电路CI2->第二蓄电池Ba2；此时，平板电脑的PAD的第一充电电路CI1工作在反向boost(升压)模式，键盘KB的第二充电电路CI2工作在BUCK(降压)模式。第二蓄电池Ba2为第一蓄电池Ba1充电的路径为：第二蓄电池Ba2->第二充电电路CI2->第四开关S4->第二开关S2->第一充电电路CI1->第一蓄电池Ba1；此时，键盘KB的第二充电电路CI2工作在反向boost模式，平板电脑的PAD的第一充电电路CI1工作在BUCK模式。
此外，为实现对上述各个开关的控制，平板电脑PAD上第一电子控制器EC1可以通过第一充电电路CI1检测第一蓄电池Ba1的电量；当然键盘KB上，第二电子控制器EC2可以通过第二充电电路CI2检测第二蓄电池Ba2的电量。并且，第一电子控制器EC1与第二电子控制器EC2可以实现相互通信，这种通信可以是无线通信或有线通信，例如，EC1和EC2可以通过至少一个连接器相互连接，或者EC1和EC2之间建立蓝牙或红外或NFC(Near Field Communication，近距离无线通信)连接；第一电子控制器EC1作为主控制器可以接收作为从控制器的第二电子控制器EC2上报的信息，并且第一电子控制器EC1可以向第二电子控制器EC2发送控制信息。例如，当平板电脑PAD和键盘KB通过相互连接时，平板电脑的PAD的EC1与键盘KB的EC2可以通过USB协议实现数据通信，例如平板电脑的PAD的EC1与键盘KB的EC2之间设置两对连接器，分别用于USB的一对差分信号(D+和D-)的传输。
第一电子控制器EC1具体用于确定第一蓄电池Ba1的电量较低且低于第三阈值，则确定充电方式为第二蓄电池Ba2为第一蓄电池Ba1充电；第一电子控制器EC1具体用于确定第二蓄电池Ba2的电量较低且低于第四阈值，则确定充电方式为第一蓄电池Ba1为第二蓄电池Ba2充电。在充电过程中，例如：当第一蓄电池Ba1为第二蓄电池Ba2充电时，若第一电子控制器EC1确定第一蓄电池Ba1的电量低于第五阈值，则第一电子控制器EC1用于控制第二开关K2断开，并向键盘KB发送停止充电控制指令。第二电子控制器EC2用于接收平板电脑PAD发送的停止充电控制指令，并根据停止充电控制指令控制第四开关S4断开。当第二蓄电池Ba2为第一蓄电池Ba1充电时，若第一电子控制器EC1确定第二蓄电池Ba2的电量低于第六阈值，则第一电子控制器EC1用于控制第二开关S2断开，并向键盘KB发 送停止供电控制指令。第二电子控制器EC2还用于接收平板电脑PAD发送的停止供电控制指令，并根据停止供电控制指令控制第四开关K4断开。
在该方案中，在该方案中，移动终端和外围设备可以独立供电并且当移动终端和外围设备通过连接器连接时可以实现相互充电，提高了移动终端和外围设备配合使用时的续航能力，丰富了产品功能，提升了产品竞争力。
此外，参照图5所示，在使用充电器时：平板电脑PAD还包括：第一充电器在位检测电路51，第一充电器在位检测电路51连接第一充电接口Ch1以及第一电子控制器EC1；其中，第一充电器在位检测电路51用于获取第一充电接口Ch1的采样电压，第一电子控制器EC1用于根据采样电压确定第一充电接口Ch1是否有充电器接通。示例性的，为实现采样电压与第一电子控制器EC1的耐压值相匹配，避免采样电压过高对第一电子控制器EC1损坏，提供一种第一充电器在位检测电路51的具体结构：
如图6所示，第一充电器在位检测电路51包括第八电阻R8和第九电阻R9；第八电阻R8的第一端连接第一充电接口Ch1，第八电阻R9的第二端连接第九电阻R8的第一端，第九电阻R9的第二端连接接地端GND；第九电阻R9的第一端连接第一电子控制器CE1；第一电子控制器CE1用于获取第九电阻R9的第一端的采样电压，并根据采样电压确定充电接口是否有充电器接通。例如，在无充电器插入第一充电接口Ch1时，EC1检测到R9第一端的电平与GND等电势，当有充电器插入第一充电接口Ch1时，EC1检测到R9第一端的电平为电阻R9对充电器提供的电源的分压，基于此EC1可以实现充电器的在位检测。
此外，键盘KB也具有第二充电器在位检测电路52，其具体结构以及连接方式与平板电脑PAD类似这里不再赘述，其中第二电子控制器CE2也可以根据键盘KB的第二充电器在位检测电路52的采样电压确定键盘KB是否有充电器接通，并通知第一电子控制器CE1。这样，第一电子控制器CE1便可以得知平板电脑PAD和键盘KB是否有充电器接通。
当第一电子控制器EC1确定第一充电接口Ch1有充电器接通和/或键盘KB的第二充电接口Ch2有充电器接通时，第一电子控制器EC1还用于重新确定充电方式，充电方式还包括：第一充电接口Ch1连接的充电器为第一蓄电池Ba1和第二蓄电池Ba2充电，或第二充电接口Ch1连接的充电器为第一蓄电池Ba1和第二蓄电池Ba2充电，或第一充电接口Ch1连接的充电器为第一蓄电池Ba1并且第二充电接口Ch2连接的充电器为第二蓄电池Ba2充电。
充电方式为采用第一充电接口Ch1连接的充电器为第一蓄电池Ba1和第二蓄电池Ba2充电时，第一电子控制器EC1根据充电方式控制第一开关S1和第二开关S2闭合，并且第二电子控制器EC2根据充电方式控制第四开关S4闭合、控制第三开关S3断开；充电方式为采用第二充电接口Ch1连接的充电器为第一蓄电池Ba1和第二蓄电池Ba2充电时，第一电子控制器EC1根据充电方式控制第一开关S1断开、第二开关S2闭合，并且第二电子控制器EC2根据充电方式控制第三开关S3和第四开关S4闭合。
此外，第一充电接口Ch1可以包括但不限于：USB(Universal Serial Bus， 通用串行总线)、HDMI(High Definition Multimedia Interface，高清晰度多媒体接口)、URAT(Universal Asynchronous Receiver/Transmitter，通用异步收发传输器)等扩展接口，以下方案以USB为例进行说明；第二充电接口Ch2可以包括但不限于：USB、HDMI、URAT等扩展接口，以下方案以USB为例进行说明。
使用充电器充电的方案具体可以包括以下两种：
方案一：平板电脑的USB接口插入充电器，平板电脑PAD的EC1控制平板电脑PAD的第一开关S1以及第二开关S2闭合，键盘KB的EC2控制键盘KB的第四开关S4闭合，键盘KB的EC2控制键盘KB的第三开关S3断开：
充电的路径1为：充电器->平板电脑PAD的USB接口->平板电脑的PAD的第一开关S1->平板电脑的PAD的第一充电电路CI1->平板电脑的PAD的第一蓄电池Ba1；
充电的路径2为：充电器->平板电脑PAD的USB接口->平板电脑的PAD的第一开关S1->平板电脑的PAD的第二开关S2->键盘KB的第四开关S4->键盘KB的第二充电电路Ch2->键盘KB的第二蓄电池Ba2。
方案二：键盘的USB接口插入充电器，平板电脑PAD的EC1控制平板电脑PAD的第二开关S2闭合，平板电脑PAD的EC1控制平板电脑PAD的第一开关S1断开，键盘KB的EC2控制键盘KB的第三开关S3以及第四开关S4闭合：
充电的路径1为：充电器->键盘KB的USB接口->键盘KB的第三开关S3->键盘KB的第二充电电路Ch2->键盘KB的第二蓄电池Ba2；
充电的路径2为：充电器->键盘KB的USB接口->键盘KB的第三开关S3->键盘KB的第四开关S4->平板电脑的PAD的第二开关S2->平板电脑的PAD的第一充电电路Ch1->平板电脑的PAD的第一蓄电池Ba1。
当平板电脑的USB接口以及键盘的USB接口均插入充电器时，平板电脑PAD的EC1也可以控制平板电脑PAD的第二开关S2断开、第一开关S1闭合，键盘KB的EC2控制键盘KB的第四开关S4断开、第三开关S3闭合，两者分别充电，当然即使平板电脑的USB接口以及键盘的USB接口均插入充电器，也可以按照上述方案一或者方案二提供的方式，只采用一个充电器进行充电。这样，平板电脑PAD与键盘KB之间只通过第一连接器和第三连接器的连接便可实现上述五种充电方式，提高了设备相互充电的可靠性，简化了设备间的连接结构。
此外如图5所示，平板电脑PAD还包括：第一死区控制电路53和第一低压差线性稳压器LDO1；
第一死区控制电路53的第一输入端连接至第一充电接口Ch1，第一死区控制电路53的输出端连接第一电子控制器CE1；第一低压差线性稳压器LDO1的输入端连接第一充电电路CI1的第三端，第一低压差线性稳压器LDO1的输出端第一死区控制电路53的第二输入端；当第一蓄电池Ba1的电量小于等于第一阈值时，并且第一充电接口Ch1接通充电器时，第一充电接口Ch1接通的充电器通过第一死区控制电路53向第一电子控制器CE1供电；当第一蓄电池Ba1的电量大于第一阈值时，第一蓄电池Ba1通过第一充电电路CI向第一低压差线性稳压器LDO1供电，第一低压差线性稳压器LDO1通过第一死区控制电路53向第一电子控制器CE1供 电。
同样，如图5所示，键盘KB还包括：第二死区控制电路54和第二低压差线性稳压器LDO2；第二死区控制电路54的第一输入端连接至第二充电接口Ch2，第二死区控制电路54的输出端连接第二电子控制器EC2；第二低压差线性稳压器LDO2的输入端连接第二充电电路CI2的第三端，第二低压差线性稳压器LDO2的输出端第二死区控制电路54的第二输入端；当第二蓄电池Ba2的电量小于等于第二阈值时，并且第二充电接口Ch2接通充电器时，第二充电接口Ch2接通的充电器通过第二死区控制电路54向第二电子控制器CE2供电；当第二蓄电池Ba2的电量大于第二阈值时，第二蓄电池Ba2通过第二充电电路CI2向第二低压差线性稳压器LDO2供电，第二低压差线性稳压器LDO2通过第二死区控制电路54向第二电子控制器EC2供电。
如图7所示，第一死区控制电路53包括降压式变换BUCK电路531、第一电阻R1、第二电阻R2、第三电阻R3、第四电阻R4、第五电阻R5、第六电阻R6、第七电阻R7、第一三极管Q1、第二三极管Q2、第一MOS管M1以及第二MOS管M2；其中，BUCK电路的输入端连接第一死区控制电路的第一输入端，第一电阻的第一端连接第一死区控制电路的第一输入端，第一电阻的第二端连接BUCK电路的使能EN端，第一电阻的第二端还通过第二电阻连接接地端；BUCK电路的EN端还连接第一三极管的集电极，第一三极管的发射极连接接地端，第一三极管的基极连接第三电阻的第一端，第三电阻的第二端连接第一死区控制电路的第二输入端，第三电阻的第二端还连接第四电阻的第一端；BUCK电路的输出端连接第一MOS管的漏极，第一MOS管的源极连接第二MOS管的源极，第一MOS管的栅极通过第五电阻连接接地端，第四电阻的第二端还连接第一MOS管的栅极；第二MOS管的源极通过第六电阻连接第二MOS管的栅极，第二MOS管的源极连接第一死区控制电路的输出端，第二MOS管的栅极还连接第二三极管的集电极，第二MOS管的漏极连接第一死区控制电路的第二输入端，第二三极管的基极通过第七电阻连接第一死区控制电路的第二输入端。
键盘KB的第二死区控制电路54与平板电脑PAD的第一死区控制电路53的结构相同，如图所示，不再赘述。
此外，如图7所示，平板电脑PAD还包括：还包括第一肖特基二极管SCK1和第二肖特基二极管SCK2；其中，第一肖特基二极管SCK1的阳极连接第一充电接口Ch1，第一肖特基二极管SCK2的阴极连接第二肖特基二极管SCK2的阴极，第二肖特基二极管SCK2的阳极连接第二开关S2的第二端；第一肖特基二极管SCK1的阴极还连接第一死区控制电路53的第一输入端。
其中，第一死区控制电路53的工作原理如下：为了实现裸露的第一充电接口Ch1不带电，第一开关S1默认处于断开状态。当第一蓄电池消耗殆尽(第一蓄电池的电量小于第一阈值)，第一充电接口Ch1插入充电器时，电能无法传递到蓄电池。因为第一开关S1需要EC1控制才能在断开和闭合之间进行转换，此时第一蓄电池Ba1消耗殆尽时无法为EC1正常供电，无法启动系统，不能改变第一开关S1的状态。本申请的实施例设置第一死区控制电路53，如图4所示，当第一充 电接口Ch1有充电器插入时，立即启动第一死区控制电路53，给EC1供电，EC1使第一开关S1闭合，充电器通过第一充电电路CI1给蓄第一蓄电池Ba1充电，使第一蓄电池Ba1恢复电量。在键盘KB上第二死区控制电路53的工作原理与上述类似不再赘述。
以平板电脑PAD第一死区控制电路53为例，参照图所示的具体电路结构，对其功能说明如下：
实际情况存在问题,即S1断开时，且第一蓄电池Ba1电量小于第一阈值时，第一充电接口Ch1插入充电器，不能给第一蓄电池Ba1充电，此时系统无法启动。设置第一死区控制电路53的目的在于，为EC1供电进而把S1闭合，让充电器能给第一蓄电池Ba1供电。实现过程为：
第一蓄电池Ba1电量过低(低于第一阈值)时,LDO1的输出3.3Vsys1＝0V，使Q1断开。第一充电接口Ch1插入充电器后，EN端为高电平(BUCK电路的EN端高电平使能、低电平不使能)，EN使能BUCK电路531,电流通过流过第一肖特基二极管SCK1给BUCK电路531供电。M1导通，M2断开，电流通过M1流向EC1，EC1上电后根据上述的充电方式将S1导通。充电器通过的第一充电电路CI1给第一蓄电池Ba1充电，同时给LDO1供电，之后LDO1的输出3.3Vsys1＝3.3V,Q1导通，使EN端与接地端GND导通，关闭BUCK电路531及M1。此时，Q2基极有电导通，将M2的栅极与接地端GND导通，M2导通，LDO1的输出电压3.3Vsys1依次通过M2给EC1供电。综上，实现平板电脑PAD的死区控制。键盘KB的死区控制相同不再赘述。其中M1和M2为PMOS管，GS(Gate/Source,栅极/源极)两端压差有负压即实现导通，GS两端压差相同，即实现关断。GS电压寄生二极管起防止电流倒灌的作用。
此外，由于平板电脑PAD和键盘KB连接时可能存在对位不准或者错位现象，此时平板电脑PAD和键盘KB并不能进行通信，在本申请的实施例提供的方案中，参照图5所示，平板电脑PAD还包括第一对侧设备在位检测电路55；第一对侧设备在位检测电路55连接第一电子控制器EC1以及第二连接器Co2；第二连接器Co2用于连接键盘KB的接地端，此处键盘KB的接地端连接第四连接器Co4；当第二连接器Co2与第四连接器Co4连接时，第二连接器Co2连接键盘KB的接地端时，第一电子控制器EC1根据第二连接器Co2的电平确定键盘KB在位。
如图6所示，第一对侧设备在位检测电路55包括第十电阻R10和第十一电阻R11；第十电阻R10的第一端连接预定电压值的电源VCC，第十电阻R10的第二端连接第十一电阻R11的第一端，第十一电阻R11的第二端连接接地端GND；第十电阻R10的第二端还连接第一电子控制器EC1以及第二连接器Co2。
这样在正常情况下平板电脑PAD未与键盘KB连接时，R10和R11对电源进行分压，EC1在第十电阻R10的第二端能够检测到预定电压值，而当平板电脑PAD与键盘KB连接时，第十电阻R10的第二端通过连接器连接键盘KB的接地端GND，EC1在第十电阻R10的第二端能够检测到0电势，这样EC1可以进一步在平板电脑PAD上通知用户连接成功，基于同样的原理，键盘KB也包括第二对侧设备在位检测电路56，其作用与平板电脑PAD上的第一对侧设备在位检测电路55相同，不再 赘述。具体的，PAD与KB连接时，PAD的EC1可以在PAD的显示界面上向用户推送PAD与KB连接成功的提示，KB的EC2也可以驱动点亮KB对应的指示灯提示用户KB与PAD连接成功。
此外，若第一充电接口Ch1为USB接口，第一充电接口Ch1还包括身份ID引脚，ID引脚连接EC1；当OTG传输接头插入第一充电接口Ch1时，EC1根据ID引脚的电平确定第一充电接口Ch1有OTG传输接头插入。并且在第一充电接口Ch1插入OTG传输接头时，EC1控制S1断开，避免了与平板电脑PAD的充电器电压的冲突。
上述各个开关(S1、S2、S3和S4)的结构如图8所示，包括：第三MOS管M3、第四MOS管M4、第十二电阻R12、第十三电阻R13和第三三极管Q3；
第三MOS管M3的漏极连接开关的第一端、第三MOS管M3的源极连接第四MOS管M4的源极，第四MOS管M4的漏极连接开关的第二端；
第三MOS管M3的源极还连接第十二电阻R12的第一端，第十二电阻R12的第二端连接第三MOS管M3的栅极、第四MOS管M4的栅极以及第十三电阻R13的第一端；第十三电阻R13的第二端连接第三三极管Q3的集电极，第三三极管Q3的基极连接开关的控制端，第三三极管Q3的发射极连接接地端GND。如上开关均为背靠背结构，防止了电流的倒灌。
此外，平板电脑PAD还包括第一限流电路57，如图10所示，第一充电电路CI1的限流引脚连接限流电路的输入端，第一限流电路57的控制端连接EC1；EC1根据第一蓄电池Ba1的电量以及第二蓄电池Ba2的电量确定第一蓄电池Ba1的充电功率以及第二蓄电池Ba2的充电功率，第一电子控制器EC1根据第一蓄电池Ba1的充电功率通过第一限流电路57控制第一充电电路CI1的限流引脚的电流，并将第二蓄电池Ba2的充电功率发送至键盘KB，其中第一充电电路CI1对第一蓄电池Ba1的充电功率与限流引脚的电流对应。第一限流电路57包括：第十四电阻R14、第十五电阻R15、第十六电阻R16以及第四三极管Q4；第十四电阻R14的第一端连接充电电路12的限流引脚，第十四电阻R14的第二端连接第四三极管Q4的集电极；第十五电阻R15的第一端连接充电电路12的限流引脚，第十五电阻R15的第二端连接接地端GND；第四三极管Q4的栅极通过第十六电阻R16连接第一限流电路57的控制端，第四三极管Q4的发射极连接接地端GND。键盘KB还包括第二限流电路，第二充电电路CI2的限流引脚连接限流电路的输入端，第二限流电路的控制端连接EC2；EC2根据EC1发送的第二蓄电池Ba2的充电功率通过第二限流电路控制第二充电电路CI2的限流引脚的电流，其中第二充电电路CI2对第二蓄电池Ba2的充电功率与限流引脚的电流对应。键盘KB的第二限流电路的具体结构与平板电脑PAD的第一限流电路57的结构相同这里不再赘述。
其中，第一充电电路和/或第二充电电路可以采用BQ24x9x系列的charger(充电器)芯片(其外围电路附图未示出)，其包含限流引脚ILIM(如图9所示)。其中，通过控制ILIM接入的电阻，调节充电电流，使充电电路输出限流，实现动态功率分配，以键盘KB插入充电器为例，假设R14＝354Ω，R15＝1.05kΩ，R16＝1kΩ：
1)充电器总功率为10W,当平板电脑PAD的第一蓄电池电量较低，并且键盘KB的充电器给平板电脑PAD的第一蓄电池充电时，Q4管断开，ILIM接入的电阻R＝1.05K，设置充电限流为500mA，电压5V,功率2.5W,即分配7.5W给平板电脑的第一蓄电池充电。2)当键盘KB不给平板电脑PAD充电时，Q4管导通，R＝265Ω，限流为2A时，键盘KB独自使用10W功率给键盘的第二蓄电池充电。类似的，若平板电脑PAD插入充电器，则可以基于上述类似的原理为自身分配7.5W的功率充电，为键盘KB分配2.5W的功率充电。
此外，在一种实施例中，平板电脑PAD还包括第一显示模块58；第一电子控制器EC1确定第一蓄电池处于充电状态时，控制第一显示模块58显示平板电脑PAD处于充电状态的标识，第一电子控制器EC1确定第一蓄电池处于供电状态时，控制第一显示模块58显示PAD处于供电状态的标识；第一电子控制器EC1确定第二蓄电池处于充电状态时，控制第一显示模块58显示键盘KB处于充电状态的标识，第一电子控制器EC1确定第二蓄电池处于供电状态时，控制第一显示模块58显示键盘KB处于供电状态的标识。根据上述的充电方式，平板电脑PAD通过第一显示模块58(例如屏幕上)显示平板电脑PAD以及键盘KB充电状态的标识；如图11-13所示。
其中，如图11所示，当第二蓄电池为第一蓄电池充电时，平板电脑PAD可以在屏幕的状态栏上显示平板电脑PAD处于充电状态的标识B1、键盘KB处于供电状态的标识B2，其中在显示B1和B2的轮廓可以不同以区别平板电脑PAD和键盘KB。
如图12所示，当第一蓄电池为第二蓄电池充电时，平板电脑PAD可以在屏幕的状态栏上显示平板电脑PAD处于供电状态的标识B11、键盘KB处于充电状态的标识B22，其中在显示B11和B22的轮廓可以不同以区别平板电脑PAD和键盘KB。
如图13所示，第一充电接口接通的充电器为第一蓄电池以及第二蓄电池充电时，平板电脑PAD可以在屏幕的状态栏上显示平板电脑PAD处于充电状态的标识B1、键盘KB处于充电状态的标识B22，其中在显示B1和B22的轮廓可以不同以区别平板电脑PAD和键盘KB。如图13所示，第一充电接口接通的充电器为第一蓄电池以及第二蓄电池充电时，平板电脑PAD可以在屏幕的状态栏上显示平板电脑PAD处于充电状态的标识B1、键盘KB处于充电状态的标识B22，其中在显示B1和B22的轮廓可以不同以区别平板电脑PAD和键盘KB。如图13所示，第一充电接口接通的充电器为第一蓄电池充电，并且第二充电接口接通的充电器为第二蓄电池充电时，平板电脑PAD可以在屏幕的状态栏上显示平板电脑PAD处于充电状态的标识B1、键盘KB处于充电状态的标识B22，其中在显示B1和B22的轮廓可以不同以区别平板电脑PAD和键盘KB。
此外，在一种实施例中，键盘KB还包括第二显示模块59；第二电子控制器EC2确定第一蓄电池处于充电状态时，控制第二显示模块59显示平板电脑PAD处于充电状态的标识，第二电子控制器EC2确定第一蓄电池处于供电状态时，控制第二显示模块59显示平板电脑PAD处于供电状态的标识；第二电子控制器EC2确定第二蓄电池处于充电状态时，控制第二显示模块59显示键盘KB处于充电状态的标识，第二电子控制器EC2确定第二蓄电池处于供电状态时，控制第二显示模块59显示键盘KB处于供电状态的标识。当然键盘KB等外围设备通常为成本较低的产品， 若其包含用于显示图像的屏幕时，可以如平板电脑PAD通过屏幕显示平板电脑PAD以及键盘KB的供电状态或充电状态，若键盘KB不包含用于显示图像的屏幕，则可以通过不同颜色的指示灯，或者键盘上不同位置的指示灯标识平板电脑PAD以及键盘KB的供电状态或充电状态。
基于上述提供的移动终端和外围设备，本申请的实施例提供一种充电控制方法，包括如下步骤：
101、移动终端根据移动终端的第一蓄电池的电量和外围设备的第二蓄电池的电量确定充电方式。
步骤101具体包括：移动终端确定移动终端的第一蓄电池的电量较低且低于第三阈值，则确定充电方式为第二蓄电池为第一蓄电池充电；或者，移动终端确定外围设备的第二蓄电池的电量较低且低于第四阈值，则确定充电方式为第一蓄电池为第二蓄电池充电。充电方式包括：第一蓄电池为外围设备的第二蓄电池充电，或第二蓄电池为第一蓄电池充电。
当第一蓄电池为第二蓄电池充电时，若移动终端确定第一蓄电池的电量低于第五阈值，则移动终端控制第二开关断开，并向外围设备发送停止充电控制指令。外围设备接收移动终端发送的停止充电控制指令，并根据停止充电控制指令控制第四开关断开。
当第二蓄电池为第一蓄电池充电时，若移动终端确定第二蓄电池的电量低于第六阈值，则移动终端控制第二开关断开，并向外围设备发送停止供电控制指令。外围设备接收移动终端发送的停止供电控制指令，并根据停止供电控制指令控制第四开关断开。
当移动终端的第一充电接口和/或外围设备的充电接口连通充电器时，关于充电方式的确定方法，还包括：移动终端根据移动终端的第一充电接口的采样电压确定第一充电接口是否有充电器接通；移动终端确定移动终端的第一充电接口有充电器接通和/或外围设备的第二充电接口有充电器接通时，重新确定充电方式，充电方式还包括：第一充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或外围设备的第二充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或第一充电接口连接的充电器为第一蓄电池并且第二充电接口连接的充电器为第二蓄电池充电。
此外，在第一充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或第二充电接口连接的充电器为第一蓄电池和第二蓄电池充电充电过程中；还包括：移动终端根据移动终端的第一蓄电池的电量与外围设备的第二蓄电池的电量，确定第一蓄电池的充电功率以及第二蓄电池的充电功率，并将第二蓄电池的充电功率发送至外围设备。外围设备根据第二蓄电池的充电功率进行充电功率控制。
102、移动终端根据充电方式控制第一开关和第二开关的状态，并向外围设备发送控制信息以向外围设备通知充电方式。
103、外围设备根据移动终端发送的控制信息确定充电方式。
104、外围设备根据充电方式控制第三开关和第四开关的状态，充电方式包括：第二蓄电池为第一蓄电池充电，或第一蓄电池为第二蓄电池充电。
当移动终端的第一充电接口和/或外围设备的充电接口连通充电器时，关于充电方式的确定方法，充电方式还包括：第一充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或外围设备的第二充电接口连接的充电器为第一蓄电池和第二蓄电池充电，或第一充电接口连接的充电器为第一蓄电池并且第二充电接口连接的充电器为第二蓄电池充电。
上述方法实施例中，移动终端根据充电方式控制第一开关和第二开关的状态，以及外围设备根据充电方式控制第三开关和第四开关的状态参考装置实施例的描述，这里不再赘述。
在一种实施例中，移动终端确定第一蓄电池处于充电状态时，显示移动终端处于充电状态的标识，移动终端确定第一蓄电池处于供电状态时，显示移动终端处于供电状态的标识；移动终端确定第二蓄电池处于充电状态时，显示外围设备处于充电状态的标识，移动终端确定第二蓄电池处于供电状态时，显示外围设备处于供电状态的标识。
外围设备确定第一蓄电池处于充电状态时，显示移动终端处于充电状态的标识，外围设备确定第一蓄电池处于供电状态时，显示移动终端处于供电状态的标识；外围设备确定第二蓄电池处于充电状态时，显示外围设备处于充电状态的标识，外围设备确定第二蓄电池处于供电状态时，显示外围设备处于供电状态的标识。
其中，上述方法实施例中各部分实现的技术效果参考装置实施例中的描述这里不再赘述。
具体的，参考上述提供的平板电脑PAD和键盘KB的结构以及充电方法，本申请的实施例提供一种具体的充电控制逻辑：
当平板电脑PAD的EC1控制优先级较高时，提供一种充电控制逻辑的流程：
首先，当平板电脑PAD与键盘KB通过硬件连接器连接时，平板电脑PAD的EC1通过检测对侧电子设备在位检测电路的第十电阻R10的第二端为零电势确认键盘KB在位；键盘KB的EC2通过检测对侧电子设备在位检测电路的第十电阻R10的第二端为零电势确认平板电脑PAD在位，并上报平板电脑的EC1。然后，平板电脑PAD的EC1通过第一充电电路CI1检测第一蓄电池Ba1的电量，键盘KB的EC2通过第二充电电路CI2检测第二蓄电池Ba2的电量，平板电脑PAD的EC1以USB方式与键盘KB的EC2通信，平板电脑PAD的EC1获取键盘KB的EC2检测第二蓄电池Ba2的电量，参照图14，EC1进行充电控制：
S01、确定平板电脑的第一蓄电池Ba1的电量是否低于第一阈值，若是则执行S02，若否则执行S04。该第一阈值可以配置为任意值，当然通常取一个较低值，例如5％，意在确定平板电脑剩余电量较少时，对平板电脑进行充电。
S02、确定平板电脑的充电器是否在位，若否则执行S05，若是则执行S03。
步骤S02中确定平板电脑是否在位的具体方式参照上述说明这里不再赘述。
S03、控制平板电脑的充电器给平板电脑的Ba1以及键盘的Ba2充电，直至两者充满。
此时，采用上述的方案一：平板电脑PAD的EC1控制平板电脑PAD的第一开 关S1以及第二开关S2闭合，键盘KB的EC2控制键盘KB的第四开关S4闭合，键盘KB的EC2控制键盘KB的第三开关S3断开，平板电脑的充电器通过以下两条路径分别为平板电脑的Ba1以及键盘的Ba2充电：
充电的路径1为：充电器->平板电脑PAD的USB接口->平板电脑的PAD的第一开关S1->平板电脑的PAD的第一充电电路CI1->平板电脑的PAD的第一蓄电池Ba1；
充电的路径2为：充电器->平板电脑PAD的USB接口->平板电脑的PAD的第一开关S1->平板电脑的PAD的第二开关S2->键盘KB的第四开关S4->键盘KB的第二充电电路Ch2->键盘KB的第二蓄电池Ba2。
当然，在充电过程中可以通过限流电路为平板电脑和键盘分配对蓄电池充电的充电功率。
S04、确定键盘的的Ba2电量是否低于第二阈值，若是则执行S05，若否则执行S10。该第二阈值可以配置为任意值，当然通常取一个较低值，例如5％，意在确定键盘的Ba2剩余电量较少时，对键盘进行充电。
S05、确定键盘的充电器是否在位，若是则执行S06，若否则执行S07。
S06、控制键盘的充电器给平板电脑的Ba1以及键盘的Ba2充电，直至两者充满。
此时，采用上述的方案二：平板电脑PAD的EC1控制平板电脑PAD的第二开关S2闭合，平板电脑PAD的EC1控制平板电脑PAD的第一开关S1断开，键盘KB的EC2控制键盘KB的第三开关S3以及第四开关S4闭合，键盘的充电器通过以下两条路径分别为平板电脑的Ba1以及键盘的Ba2充电：
充电的路径1为：充电器->键盘KB的USB接口->键盘KB的第三开关S3->键盘KB的第二充电电路Ch2->键盘KB的第二蓄电池Ba2；
充电的路径2为：充电器->键盘KB的USB接口->键盘KB的第三开关S3->键盘KB的第四开关S4->平板电脑的PAD的第二开关S2->平板电脑的PAD的第一充电电路Ch1->平板电脑的PAD的第一蓄电池Ba1。
当然，在充电过程中可以通过键盘的限流电路为平板电脑和键盘分配对蓄电池充电的充电功率。
S07、确定平板电脑的充电器是否在位，若否则执行S09，若是则执行S08。
S08、控制平板电脑的充电器给平板电脑的Ba1以及键盘的Ba2充电，直至两者充满。
S09、若确定平板电脑的的Ba1的电量高于键盘的的Ba2的电量，则控制平板电脑的Ba1为键盘的Ba2充电；若确定键盘的的Ba2的电量高于平板电脑的的Ba1的电量，则控制键盘的Ba2为平板电脑的Ba1充电。并且在S09过程中继续执行步骤S01。
其中，平板电脑的Ba1为键盘的Ba2充电或键盘的Ba2为平板电脑的Ba1充电的过程具体参照上述实施例的描述，这里不再赘述。
S10、确定键盘的充电器是否在位，若是则执行S11，若否则执行S01。
S11、确定平板电脑的充电器是否在位，若否则执行S06，若是则执行S03。
当然以上只是一种控制逻辑，以上控制逻辑是基于本申请的实施例提供的设备的各个结构的基本功能实现的，当然其他可以依据本申请实施例提供的设备实现的控制逻辑也是应当属于本申请的保护范围的。
以上，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权利要求的保护范围为准。

Claims (33)

  1. 一种移动终端，其特征在于，包括:第一开关、第二开关、第一充电接口、第一充电电路、第一连接器、第一蓄电池和第一电子控制器；
    所述第一开关的第一端连接所述第一充电接口，所述第一开关的第二端连接所述第一充电电路的第一端；
    所述第二开关的第一端连接所述第一充电电路的第一端，所述第二开关的第二端连接所述第一连接器；
    所述第一充电电路的第二端与所述第一蓄电池连接，用于控制所述第一蓄电池的充电过程；
    所述第一连接器用于连接外围设备；
    所述第一电子控制器与所述第一开关的控制端以及所述第二开关的控制端连接，并与所述外围设备通信；
    所述第一电子控制器用于根据所述第一蓄电池的电量和所述外围设备的第二蓄电池的电量确定充电方式，根据所述充电方式控制所述第一开关和所述第二开关的状态，并向所述外围设备发送控制信息以向所述外围设备通知所述充电方式，所述充电方式包括：所述第一蓄电池为所述第二蓄电池充电，或所述第二蓄电池为所述第一蓄电池充电。
  2. 根据权利要求1所述的移动终端，其特征在于，所述移动终端还包括：第一死区控制电路和第一低压差线性稳压器，
    所述第一死区控制电路的第一输入端连接至所述第一充电接口，所述第一死区控制电路的输出端连接所述第一电子控制器；所述第一低压差线性稳压器的输入端连接所述第一充电电路的第三端，所述第一低压差线性稳压器的输出端所述第一死区控制电路的第二输入端；
    当所述第一蓄电池的电量小于等于第一阈值时，并且所述第一充电接口接通充电器时，所述第一充电接口接通的充电器通过所述第一死区控制电路向所述第一电子控制器供电；
    当所述第一蓄电池的电量大于第一阈值时，所述第一蓄电池通过所述第一充电电路向所述第一低压差线性稳压器供电，所述第一低压差线性稳压器通过所述第一死区控制电路向所述第一电子控制器供电。
  3. 根据权利要求2所述的移动终端，其特征在于，所述第一死区控制电路包括：降压式变换BUCK电路、第一电阻、第二电阻、第三电阻、第四电阻、第五电阻、第六电阻、第七电阻、第一三极管、第二三极管、第一MOS管以及第二MOS管；
    其中，所述BUCK电路的输入端连接所述第一死区控制电路的第一输入端，所述第一电阻的第一端连接所述第一死区控制电路的第一输入端，所述第一电阻的第二端连接所述BUCK电路的使能EN端，所述第一电阻的第二端还通过所述第二电阻连接接地端；
    所述BUCK电路的EN端还连接所述第一三极管的集电极，所述第一三极管的发射极连接接地端，所述第一三极管的基极连接第三电阻的第一端，所述第三电 阻的第二端连接所述第一死区控制电路的第二输入端，所述第三电阻的第二端还连接第四电阻的第一端；
    所述BUCK电路的输出端连接所述第一MOS管的漏极，所述第一MOS管的源极连接第二MOS管的源极，所述第一MOS管的栅极通过所述第五电阻连接接地端，所述第四电阻的第二端还连接所述第一MOS管的栅极；
    所述第二MOS管的源极通过所述第六电阻连接所述第二MOS管的栅极，所述第二MOS管的源极连接所述第一死区控制电路的输出端，所述第二MOS管的栅极还连接所述第二三极管的集电极，所述第二MOS管的漏极连接所述第一死区控制电路的第二输入端，所述第二三极管的基极通过所述第七电阻连接所述第一死区控制电路的第二输入端。
  4. 根据权利要求3所述的移动终端，其特征在于，还包括第一肖特基二极管和第二肖特基二极管；
    其中，所述第一肖特基二极管的阳极连接所述第一充电接口，所述第一肖特基二极管的阴极连接所述第二肖特基二极管的阴极，所述第二肖特基二极管的阳极连接所述第二开关的第二端；
    所述第一肖特基二极管的阴极还连接所述第一死区控制电路的第一输入端。
  5. 根据权利要求1所述的移动终端，其特征在于，所述移动终端还包括充电器在位检测电路，所述充电器在位检测电路连接所述第一充电接口以及所述第一电子控制器；
    其中，所述充电器在位检测电路用于获取所述第一充电接口的采样电压，所述第一电子控制器用于根据所述采样电压确定所述第一充电接口是否有充电器接通；
    当所述第一电子控制器确定所述第一充电接口有充电器接通和/或所述外围设备的第二充电接口有充电器接通时，所述第一电子控制器还用于重新确定所述充电方式，所述充电方式还包括：所述第一充电接口连接的充电器为所述第一蓄电池和所述第二蓄电池充电，或所述第二充电接口连接的充电器为所述第一蓄电池和所述第二蓄电池充电，或所述第一充电接口连接的充电器为所述第一蓄电池并且所述第二充电接口连接的充电器为所述第二蓄电池充电。
  6. 根据权利要求5所述的移动终端，其特征在于，所述充电器在位检测电路包括第八电阻和第九电阻；
    所述第八电阻的第一端连接所述第一充电接口，所述第八电阻的第二端连接所述第九电阻的第一端，所述第九电阻的第二端连接接地端；所述第九电阻的第一端连接所述第一电子控制器；
    所述第一电子控制器用于获取所述第九电阻的第一端的采样电压，并根据所述采样电压确定所述充电接口是否有充电器接通。
  7. 根据权利要求1所述的移动终端，其特征在于，所述移动终端还包括对侧设备在位检测电路；所述对侧设备在位检测电路连接所述第一电子控制器以及第二连接器；所述第二连接器用于连接所述对侧设备的接地端；
    当所述第二连接器连接所述对侧设备的接地端时，所述第一电子控制器根据 所述第二连接器的电平确定所述对侧设备在位。
  8. 根据权利要求7所述的移动终端，其特征在于，
    所述对侧设备在位检测电路包括第十电阻和第十一电阻；
    所述第十电阻的第一端连接预定电压值的电源，所述第十电阻的第二端连接第十一电阻的第一端，所述第十一电阻的第二端连接接地端；所述第十电阻的第二端还连接所述第一电子控制器以及所述第二连接器。
  9. 根据权利要求1所述的移动终端，其特征在于，所述第一充电接口为USB接口，所述第一充电接口包括身份ID引脚，所述ID引脚连接所述第一电子控制器；当OTG传输接头插入所述充电接口时，所述第一电子控制器用于根据所述ID引脚的电平确定所述第一充电接口是否有OTG传输接头插入。
  10. 根据权利要求1所述的移动终端，其特征在于，所述第一开关和/或第二开关包括：第三MOS管、第四MOS管、第十二电阻、第十三电阻和第三三极管；
    所述第三MOS管的源极连接所述第四MOS管的源极；所述第三MOS管的源极还连接所述第十二电阻的第一端，所述第十二电阻的第二端连接所述第三MOS管的栅极、所述第四MOS管的栅极以及所述第十三电阻的第一端；所述第十三电阻的第二端连接所述第三三极管的集电极，所述第三三极管的发射极连接接地端；
    所述第三MOS管、所述第四MOS管、所述第十二电阻、所述第十三电阻和所述第三三极管组成第一开关时，所述第三MOS管的漏极连接所述第一开关的第一端，所述第四MOS管的漏极连接所述第一开关的第二端，所述第三三极管的基极连接所述第一开关的控制端；
    所述第三MOS管、所述第四MOS管、所述第十二电阻、所述第十三电阻和所述第三三极管组成第二开关时，所述第三MOS管的漏极连接所述第二开关的第一端，所述第四MOS管的漏极连接所述第二开关的第二端，所述第三三极管的基极连接所述第二开关的控制端。
  11. 根据权利要求5所述的移动终端，其特征在于，还包括限流电路，所述第一充电电路的限流引脚连接限流电路的输入端，所述限流电路的控制端连接所述第一电子控制器；所述第一电子控制器根据所述第一蓄电池的电量以及所述第二蓄电池的电量确定所述第一蓄电池的充电功率以及第二蓄电池的充电功率，所述第一电子控制器根据所述第一蓄电池的充电功率通过所述限流电路控制所述第一充电电路的限流引脚的电流，并将所述第二蓄电池的充电功率发送至所述外围设备，其中所述第一充电电路对第一蓄电池的充电功率与所述限流引脚的电流对应。
  12. 根据权利要求11所述的移动终端，其特征在于，所述限流电路包括：第十四电阻、第十五电阻、第十六电阻以及第四三极管；
    所述第十四电阻的第一端连接所述第一充电电路的限流引脚，所述第十四电阻的第二端连接所述第四三极管的集电极；
    所述第十五电阻的第一端连接所述第一充电电路的限流引脚，所述第十五电阻的第二端连接接地端；
    所述第四三极管的栅极通过第十六电阻连接所述限流电路的控制端，所述第 四三极管的发射极连接接地端。
  13. 根据权利要求1-12任一项所述的移动终端，其特征在于，还包括第一显示模块；
    所述第一电子控制器确定所述第一蓄电池处于充电状态时，控制所述第一显示模块显示所述移动终端处于充电状态的标识，所述第一电子控制器确定所述第一蓄电池处于供电状态时，控制所述第一显示模块显示所述移动终端处于供电状态的标识；所述第一电子控制器确定所述第二蓄电池处于充电状态时，控制所述第一显示模块显示所述外围设备处于充电状态的标识，所述第一电子控制器确定所述第二蓄电池处于供电状态时，控制所述第一显示模块显示所述外围设备处于供电状态的标识。
  14. 根据权利要求1-12任一项所述的移动终端，其特征在于，
    所述第一电子控制器具体用于确定所述移动终端的第一蓄电池的电量较低且低于第三阈值，则确定充电方式为所述第二蓄电池为所述第一蓄电池充电；所述第一电子控制器具体用于确定所述外围设备的第二蓄电池的电量较低且低于第四阈值，则确定充电方式为所述第一蓄电池为所述第二蓄电池充电。
  15. 根据权利要求14所述的移动终端，其特征在于，当所述第一蓄电池为所述第二蓄电池充电时，若所述第一电子控制器确定所述第一蓄电池的电量低于第五阈值，则所述第一电子控制器用于控制所述第二开关断开，并向所述外围设备发送停止充电控制指令。
  16. 根据权利要求14所述的移动终端，其特征在于，当所述第二蓄电池为所述第一蓄电池充电时，若所述第一电子控制器确定所述第二蓄电池的电量低于第六阈值，则所述第一电子控制器用于控制所述第二开关断开，并向所述外围设备发送停止供电控制指令。
  17. 根据权利要求1-16任一项所述的移动终端，其特征在于，所述第一连接器为pogo pin弹簧顶针连接器。
  18. 一种外围设备，其特征在于，包括第三开关、第四开关、第二充电接口、第二充电电路、第三连接器、第二蓄电池和第二电子控制器；
    所述第三开关的第一端连接所述第二充电接口，所述第三开关的第二端连接和所述第二充电电路的第一端；
    所述第四开关的第一端连接所述第二充电电路的第一端，所述第四开关的第二端连接所述第三连接器；
    所述第二充电电路的第二端与所述第二蓄电池连接，用于控制所述第二蓄电池的充电过程；
    所述第三连接器用于连接移动终端；
    所述第二电子控制器与所述第三开关的控制端以及所述第四开关的控制端连接，并与所述移动终端通信；
    所述第二电子控制器用于根据所述移动终端发送的控制信息确定充电方式，并根据所述充电方式控制所述第三开关和所述第四开关的状态，所述充电方式包括：所述第二蓄电池为所述第一蓄电池充电，或所述第一蓄电池为所述第二蓄电 池充电。
  19. 根据权利要求18所述的外围设备，其特征在于，所述外围设备还包括：第二死区控制电路和第二低压差线性稳压器；
    所述第二死区控制电路的第一输入端连接至所述第二充电接口，所述第二死区控制电路的输出端连接所述第二电子控制器；所述第二低压差线性稳压器的输入端连接所述第二充电电路的第三端，所述第二低压差线性稳压器的输出端所述第二死区控制电路的第二输入端；
    当所述第二蓄电池的电量小于等于第二阈值时，并且所述第二充电接口接通充电器时，所述第二充电接口接通的充电器通过所述第二死区控制电路向所述第二电子控制器供电；
    当所述第二蓄电池的电量大于第二阈值时，所述第二蓄电池通过所述第二充电电路向所述第二低压差线性稳压器供电，所述第二低压差线性稳压器通过所述第二死区控制电路向所述第二电子控制器供电。
  20. 根据权利要求18所述的外围设备，其特征在于，还包括第二显示模块；
    所述第二电子控制器确定所述第一蓄电池处于充电状态时，控制所述第二显示模块显示所述移动终端处于充电状态的标识，所述第二电子控制器确定所述第一蓄电池处于供电状态时，控制所述第二显示模块显示所述移动终端处于供电状态的标识；所述第二电子控制器确定所述第二蓄电池处于充电状态时，控制所述第二显示模块显示所述外围设备处于充电状态的标识，所述第二电子控制器确定所述第二蓄电池处于供电状态时，控制所述第二显示模块显示所述外围设备处于供电状态的标识。
  21. 根据权利要求18所述的外围设备，其特征在于，所述第二电子控制器还用于接收移动终端发送的停止充电控制指令，并根据所述停止充电控制指令控制所述第四开关断开。
  22. 根据权利要求18所述的外围设备，其特征在于，所述第二电子控制器还用于接收移动终端发送的停止供电控制指令，并根据所述停止供电控制指令控制所述第四开关断开。
  23. 一种如权利要求1-17任一项所述的移动终端的充电方法，其特征在于，包括：
    移动终端根据所述移动终端的第一蓄电池的电量和外围设备的第二蓄电池的电量确定充电方式；
    所述移动终端根据所述充电方式控制第一开关和第二开关的状态，并向所述外围设备发送控制信息以向所述外围设备通知所述充电方式，所述充电方式包括：所述第一蓄电池为所述外围设备的第二蓄电池充电，或所述第二蓄电池为所述第一蓄电池充电。
  24. 根据权利要求23所述的方法，其特征在于，所述方法还包括：
    所述移动终端根据所述移动终端的第一充电接口的采样电压确定所述第一充电接口是否有充电器接通；
    所述移动终端确定所述移动终端的第一充电接口有充电器接通和/或所述外 围设备的第二充电接口有充电器接通时，重新确定所述充电方式，所述充电方式还包括：所述第一充电接口连接的充电器为所述第一蓄电池和所述第二蓄电池充电，或所述外围设备的第二充电接口连接的充电器为所述第一蓄电池和所述第二蓄电池充电，或所述第一充电接口连接的充电器为所述第一蓄电池并且所述第二充电接口连接的充电器为所述第二蓄电池充电。
  25. 根据权利要求24所述的方法，其特征在于，所述方法还包括：
    所述移动终端根据所述移动终端的第一蓄电池的电量与所述外围设备的第二蓄电池的电量，确定所述第一蓄电池的充电功率以及所述第二蓄电池的充电功率，并将所述第二蓄电池的充电功率发送至所述外围设备。
  26. 根据权利要求23-25任一项所述的方法，其特征在于，所述方法还包括：
    所述移动终端确定所述第一蓄电池处于充电状态时，显示所述移动终端处于充电状态的标识，所述移动终端确定所述第一蓄电池处于供电状态时，显示所述移动终端处于供电状态的标识；所述移动终端确定所述第二蓄电池处于充电状态时，显示所述外围设备处于充电状态的标识，所述移动终端确定所述第二蓄电池处于供电状态时，显示所述外围设备处于供电状态的标识。
  27. 根据权利要求23所述的方法，其特征在于，所述移动终端根据所述移动终端的第一蓄电池的电量和外围设备的第二蓄电池的电量确定充电方式，包括：
    所述移动终端确定所述移动终端的第一蓄电池的电量较低且低于第三阈值，则确定充电方式为所述第二蓄电池为所述第一蓄电池充电；或者，
    所述移动终端确定所述外围设备的第二蓄电池的电量较低且低于第四阈值，则确定充电方式为所述第一蓄电池为所述第二蓄电池充电。
  28. 根据权利要求27所述的方法，其特征在于，当所述第一蓄电池为所述第二蓄电池充电时，若所述移动终端确定所述第一蓄电池的电量低于第五阈值，则所述移动终端控制所述第二开关断开，并向所述外围设备发送停止充电控制指令。
  29. 根据权利要求27所述的方法，其特征在于，当所述第二蓄电池为所述第一蓄电池充电时，若所述移动终端确定所述第二蓄电池的电量低于第六阈值，则所述移动终端控制所述第二开关断开，并向所述外围设备发送停止供电控制指令。
  30. 一种如权利要求18-22任一项所述的外围设备的充电方法，其特征在于，包括：
    所述外围设备根据所述移动终端发送的控制信息确定充电方式；
    所述外围设备根据所述充电方式控制所述第三开关和所述第四开关的状态，所述充电方式包括：所述第二蓄电池为所述第一蓄电池充电，或所述第一蓄电池为所述第二蓄电池充电。
  31. 根据权利要求30所述的方法，其特征在于，
    所述外围设备确定所述第一蓄电池处于充电状态时，显示所述移动终端处于充电状态的标识，所述外围设备确定所述第一蓄电池处于供电状态时，显示所述移动终端处于供电状态的标识；所述外围设备确定所述第二蓄电池处于充电状态时，显示所述外围设备处于充电状态的标识，所述外围设备确定所述第二蓄电池处于供电状态时，显示所述外围设备处于供电状态的标识。
  32. 根据权利要求30所述的方法，其特征在于，所述外围设备接收移动终端发送的停止充电控制指令，并根据所述停止充电控制指令控制所述第四开关断开。
  33. 根据权利要求30所述的方法，其特征在于，所述外围设备接收移动终端发送的停止供电控制指令，并根据所述停止供电控制指令控制所述第四开关断开。
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