WO2018157672A1 - 一种无线充电发射装置及其智能充电输入和输出方法 - Google Patents

一种无线充电发射装置及其智能充电输入和输出方法 Download PDF

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Publication number
WO2018157672A1
WO2018157672A1 PCT/CN2018/072592 CN2018072592W WO2018157672A1 WO 2018157672 A1 WO2018157672 A1 WO 2018157672A1 CN 2018072592 W CN2018072592 W CN 2018072592W WO 2018157672 A1 WO2018157672 A1 WO 2018157672A1
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WO
WIPO (PCT)
Prior art keywords
wireless charging
power
signal
coil
control unit
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Application number
PCT/CN2018/072592
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English (en)
French (fr)
Inventor
刑益涛
Original Assignee
深圳市特斯拉无线设备有限公司
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Application filed by 深圳市特斯拉无线设备有限公司 filed Critical 深圳市特斯拉无线设备有限公司
Publication of WO2018157672A1 publication Critical patent/WO2018157672A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—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

Definitions

  • the present invention relates to the field of wireless charging, and in particular to a wireless charging transmitting device and a smart charging input and output method thereof.
  • the wireless charging system includes a wireless charging transmitter and a wireless charging receiver.
  • the technical implementation generally adopts a direct current to alternating current, so that the alternating current driving transmitting coil transmits the alternating electromagnetic energy to the receiving coil, and then the induced alternating current is converted to direct current for receiving.
  • the device is powered.
  • the wireless charging transmitter product it is generally divided into four parts: a DC power supply module, a DC power transmission line, a wireless charging transmission circuit module, and a transmitting coil module, wherein the DC power supply module is generally an adapter and a large-capacity battery.
  • the DC power transmission line is a conventional electric wire suitable for conducting power direct current and low frequency signal alternating current, such as a USB cable.
  • the wireless charging transmitting circuit module and the transmitting coil module are generally installed in the same housing, or in a rare case, are installed in two or more parts but are closely mechanically connected together.
  • a set of housings which is easy to manufacture and install, meets the architectural design requirements of existing wireless charging transmitters, and has practical operability.
  • the wireless charging receiver product is generally divided into a wireless charging receiving coil module, a wireless charging receiving circuit module, a direct current adjusting circuit module, and a load module.
  • the load module is generally a secondary battery.
  • the wireless charging receiver is characterized in that the wireless charging receiving circuit module has the capability of transmitting a regulating signal to the wireless charging transmitter according to the load change of the receiver and the setting of the receiver, and is used for the wireless charging transmitter to receive the active signal. The ability to adjust the output power.
  • the wireless charging transmitter product of the built-in battery generally adopts a micro-USB interface as a power input, and has a special set of 5V input type voltage regulating circuit for charging the battery. Therefore, the wireless charging transmitter product of the built-in battery has a large circuit area, high product cost, and often can only charge a single 3.7V lithium battery, which also requires a special design of a 3.7V boost circuit.
  • Energy-type power supply for the wireless charging and transmitting circuit module results in a significant reduction in power efficiency, and the appearance of the product is defective due to the presence of the micro-USB interface, and it is easy to enter the ash and cause short circuit or even overheating of the lithium battery.
  • a wireless charging transmitter product with a built-in battery has been invented to have a wireless charging receiver function, and a wireless charging receiving function is implemented by using an independent circuit or a shared circuit.
  • the independent circuit is a wireless charging receiving coil module, a wireless charging receiving circuit module and a DC adjusting circuit module of the wireless charging receiver, which are completely independent, and are not compatible with the wireless charging transmitting circuit module and the transmitting coil of the wireless charging transmitter in the same product.
  • the module has a shared condition, and then switches between the wireless charging transmission mode and the wireless charging receiving mode through the user active switching mode. This method is simple to implement, and the wireless charging transmitter and the wireless charging receiver are often arranged on both sides of the product.
  • the disadvantage is that the cost is doubled, the product volume and thickness are also increased;
  • the shared circuit is a wireless charging receiver coil module of the wireless charging receiver, a wireless charging receiving circuit module and a wireless charging transmitter in the same product
  • the wireless charging transmitting circuit module and the transmitting coil module are shared, that is, the wireless charging receiving/transmitting coil module is physically the same, and the wireless charging receiving/transmitting circuit module is physically the same, and then adopts a user active switching switch.
  • Gravity switch Two ways in one or both of a function of switching between the wireless charging transmitter or a wireless charging receiver, this method is difficult to achieve high, but low cost, small size advantages.
  • the shared circuit type product since the user switches between the active switching switch and the gravity switch, there is a possibility of switching failure, such as the user forgetting to actively switch, or the product is placed in the opposite direction to the gravity switch design. Directions can cause security risks. If the other wireless charging device is a wireless charging transmitter, and the shared circuit type product also switches to the wireless charging transmitter mode, there is another wireless charging device to the shared circuit mode. The product reverses energy, and the energy of the product of the shared circuit type is directly supplied to the battery without passing through the DC power adjustment circuit module, thereby causing damage or even explosion of the battery.
  • the technical problem to be solved by the present invention is to provide a wireless charging transmitting apparatus for implementing the intelligent switching charging mode in view of the above-mentioned drawbacks of the prior art.
  • the technical problem to be solved by the present invention is to provide a smart charging input method for a wireless charging transmitting device, which solves the problem that the wireless charging devices of both parties are in danger of being in a wireless charging transmitting mode.
  • the technical problem to be solved by the present invention is to provide a smart charging output method for a wireless charging transmitting device, which solves the problem that the wireless charging devices of both parties are in danger of being in a wireless charging transmission mode.
  • the technical solution adopted by the present invention to solve the technical problem thereof is to provide a wireless charging transmitting device, comprising a control unit, a wireless charging coil, a power management unit and an energy storage unit, and the control unit is respectively connected with the wireless charging coil and the power management unit.
  • the power management unit is respectively connected to the wireless charging coil and the energy storage unit;
  • the wireless charging coil senses an external wireless charging output device and returns a charging input signal to the control unit, the control unit controls the wireless charging coil to receive the electrical energy and store the energy into the energy storage unit;
  • the power management unit transmits a detection signal to the outside through the wireless charging coil, and returns a charging output signal to the control unit after detecting the external wireless charging input device, and the control unit controls the wireless charging coil to release the electrical energy in the energy storage unit;
  • the power management unit is configured to control a transmission direction of the power, the wireless charging coil stores the received electrical energy into the energy storage unit through the power management unit, or the power management unit releases the electrical energy in the energy storage unit through the wireless charging coil.
  • the wireless charging and transmitting device further includes a power conversion unit, and the power conversion unit is respectively connected to the wireless charging coil and the power management unit, and the power conversion unit is configured to convert the DC power of the energy storage unit into a wireless transmission station.
  • the required high frequency alternating current, or the electric energy conversion unit is used to convert the received high frequency alternating current into direct current.
  • the power conversion unit is a bridge circuit, and the bridge circuit includes four power switches, and the power switches are all connected to and controlled by the control unit.
  • control unit comprises: a power adjustment module, wherein the power adjustment module transmits an input power adjustment signal to the external wireless charging output device through the wireless charging coil, or the power adjustment module receives the external wireless charging through the wireless charging coil.
  • the output power adjustment signal of the input device is controlled, and the power conversion unit is controlled to adjust the power of the output high frequency alternating current.
  • the power management unit includes a current detecting circuit, and the current detecting circuit is respectively connected to the control unit and the wireless charging coil, and the current detecting circuit returns the charging output to the control unit according to the current value fed back by the wireless charging coil. signal.
  • control unit further includes an envelope filter circuit between the control unit and the wireless charging coil, and the wireless charging coil transmits an output power adjustment signal to the power adjustment module through the envelope filtering circuit, and the wireless charging coil passes the package.
  • the network filter circuit transmits a charging input signal to the control unit, the charging input signal being a voltage peak of a magnetic connection point of the magnetic coil and the resonant capacitor of the wireless charging coil.
  • control unit further includes a comparator circuit between the control unit and the wireless charging coil, the control unit includes a logic and driving submodule connected to the bridge circuit, and the comparator circuit outputs wireless charging to the control unit.
  • the digital signal generated after the voltages of the two ends of the coil are compared, and the logic and the driving submodule turn on and off according to the digital signal to control the power switch of the bridge circuit to realize synchronous rectification.
  • the technical solution adopted by the present invention to solve the technical problem thereof is to provide a smart charging input method for a wireless charging transmitting device, comprising the steps of:
  • the wireless charging transmitting device When the voltage value of the monitor signal is transformed and greater than the first preset voltage value, the wireless charging transmitting device enters a wireless power input mode;
  • the wireless charging transmitting device When the wireless charging transmitting device does not enter the wireless power input mode within the preset time, the second preset voltage value is set, and when the monitoring signal is less than the second preset voltage value, the wireless charging transmitting device re-enters the listening state.
  • the technical solution adopted by the present invention to solve the technical problem thereof is to provide a smart charging output method of a wireless charging transmitting device, comprising the steps of:
  • the interval is switched to the transmitting mode, and the detecting signal is transmitted outward, and a detecting feedback signal is fed back, and the wireless charging transmitting device is in the large resistance type unidirectional energy transmission mode;
  • the current values of the two subsequent detection feedback signals are both transformed and greater than the first preset current value or smaller than the second preset current value, and the current value of the detection feedback signal is less than the third pre-suppression after stopping the detection of the detection signal. Setting the current value, the wireless charging transmitter enters the radio energy output mode.
  • the method before the completion of the two detection operations before and after the wireless charging transmitting device enters the wireless power output mode, the method further includes the following steps:
  • the interval between the second and third transmission detection signals is different from the interval between the previous two detection signals
  • the wireless charging transmitter When the current value of the third feedback feedback feedback signal is converted and greater than the first preset current value or less than the second preset current value, and after stopping the detection of the detection signal, the current value of the detection feedback signal is less than the third pre- Setting the current value, the wireless charging transmitter enters the radio energy output mode.
  • the invention has the beneficial effects that the present invention adopts a wireless charging transmitting device and an intelligent charging input and output method thereof, and adopts a common shared wireless charging receiving system based on the existing shared circuit type mode, compared with the prior art.
  • the detection technology detects the technical effect of the other wireless charging device in real time, and automatically enters the corresponding working mode under different detecting means, thereby solving the problem that the wireless charging devices of both parties are in danger in the wireless charging transmitting mode.
  • FIG. 1 is a circuit block diagram of a wireless charging transmitting apparatus of the present invention
  • Figure 2 is a block diagram of a circuit further expanded in Figure 1;
  • FIG. 3 is a circuit block diagram of a power conditioning module of the present invention.
  • Figure 4 is a circuit block diagram of the current detecting circuit of the present invention.
  • Figure 5 is a circuit diagram of Figure 4.
  • FIG. 6 is a circuit block diagram of an envelope filter circuit of the present invention.
  • Figure 7 is a circuit block diagram of a comparator circuit and a logic and drive sub-module of the present invention.
  • Figure 8 is a circuit diagram showing the combination of Figure 6 and Figure 7;
  • Figure 9 is a circuit diagram of the logic and drive sub-module of the present invention.
  • Figure 10 is a flow chart of the smart charging input method of the present invention.
  • FIG. 11 is a flow chart of a smart charging output method of the present invention.
  • Figure 12 is a flow chart of the third outgoing detection signal of Figure 11.
  • the present invention provides a preferred embodiment of a wireless charging transmitter.
  • a wireless charging transmitting device includes a control unit 20, a wireless charging coil 10, a power management unit 30, and an energy storage unit 40.
  • the control unit 20 is respectively connected to a wireless charging coil 10 and a power management unit 30, and the power management unit 30 respectively It is connected to the wireless charging coil 10 and the energy storage unit 40.
  • the wireless charging coil 10 senses an external wireless charging output device and returns a charging input signal to the control unit 20, which controls the wireless charging coil 10 to receive the electrical energy and store it in the energy storage unit 40. At this time, the wireless charging coil 10 processes the receiving mode, and after sensing the external wireless charging output device, the wireless charging transmitting device enters the in-charge mode.
  • the power management unit 30 transmits a detection signal to the outside through the wireless charging coil 10, and returns a charging output signal to the control unit 20 after detecting the external wireless charging input device, and the control unit 20 controls the wireless charging coil 10 to release the energy storage unit 40.
  • the wireless charging coil 10 processes the transmission mode, and after sensing the external wireless charging input device, the wireless charging transmitting device enters the external charging mode.
  • the power management unit 30 is configured to control the transmission direction of the electric energy, and the wireless charging coil 10 stores the received electric energy into the energy storage unit 40 through the power management unit 30, that is, the internal charging mode; or the power management unit 30
  • the electrical energy in the energy storage unit 40 is released by the wireless charging coil 10, ie, the external charging mode.
  • the energy storage unit 40 is used to store electrical energy.
  • the signal on the shared wireless charging receiving/transmitting coil is monitored to switch, so that the other wireless charging device and the current wireless charging transmitting device are simultaneously in the transmitting state. This leads to danger.
  • the external wireless charging output device is a device that emits electromagnetic waves, and is received and converted into electric energy by the wireless charging coil 10;
  • the external wireless charging input device is a device that receives electromagnetic waves, and the wireless charging coil 10 emits electromagnetic waves and is externally wireless.
  • the charging input device receives and converts it into electrical energy.
  • the present invention provides a preferred embodiment of a wireless charging transmitter.
  • the wireless charging transmitting device further includes a power converting unit 50 connected to the wireless charging coil 10 and the power management unit 30, respectively, for converting the direct current of the energy storage unit 40 into a wireless transmission.
  • the high frequency alternating current, or the electrical energy conversion unit 50 is configured to convert the received high frequency alternating current into a direct current.
  • the external wireless charging output device In the in-charge mode, the external wireless charging output device generates an electromagnetic field and is received by the wireless charging coil 10, and the wireless charging coil 10 converts the received electromagnetic field into high-frequency alternating current, and the power converting unit 50 converts the received high-frequency alternating current into The DC power is transferred and stored in the energy storage unit 40, that is, the external wireless charging output device is charged to charge the wireless charging transmitting device.
  • the power conversion unit 50 is configured to convert the direct current of the energy storage unit 40 into a high frequency alternating current required for wireless transmission, and the wireless charging coil 10 converts the high frequency alternating current into an electromagnetic field and transmits it outward, and is externally
  • the wireless charging input device receives, that is, the wireless charging transmitting device charges the external wireless charging input device.
  • the power conversion unit 50 is a bridge circuit including four power switches, all of which are connected to and controlled by the control unit 20.
  • the present invention provides a preferred embodiment of a power conditioning module.
  • the control unit 20 includes a power adjustment module 21 that transmits an input power adjustment signal to the external wireless charging output device via the wireless charging coil 10, or the power adjustment module 21 receives an external wireless charging input device through the wireless charging coil 10.
  • the output power adjustment signal controls the power conversion unit 50 to adjust the power of the output high frequency alternating current.
  • the external wireless charging output device charges the wireless charging transmitting device, and the power adjusting module 21 transmits the input power adjusting signal to the external wireless charging output device through the wireless charging coil 10, and the external wireless charging output device
  • the power of the high frequency alternating current received by the wireless charging coil 10 is adjusted according to the input power adjustment signal.
  • the wireless charging transmitting device charges the external wireless charging input device, and the power adjusting module 21 receives the output power adjusting signal of the external wireless charging input device through the wireless charging coil 10, and the power adjusting module 21 adjusts according to the output power.
  • the signal control power conversion unit 50 regulates the power of the output high frequency alternating current.
  • the present invention provides a preferred embodiment of a current sensing circuit.
  • the power management unit 30 includes a current detecting circuit 31 connected to the control unit 20 and the wireless charging coil 10, respectively.
  • the current detecting circuit 31 returns the charging output to the control unit 20 according to the current value fed back by the wireless charging coil 10. signal.
  • the power management unit 30 transmits the detection signal to the outside through the wireless charging coil 10, and feeds back the corresponding detection feedback signal.
  • the current detection circuit 31 receives the detection feedback signal, and returns to the control unit 20 according to the current value of the detection detection feedback signal. Charging the output signal, the control unit 20 controls the wireless charging coil 10 to release the electrical energy in the energy storage unit 40 according to the return charging output signal.
  • the current detecting circuit 31 detects a current using a series small resistor 311, and filters and amplifies the detected signal through the amplifier 312, and adds a reference power source 313 for detecting the bidirectional current for DC voltage boosting. design. Wherein, when there is no current, the voltage value of the feedback return charging output signal is a non-zero voltage tV; and in the transmitting mode, the voltage value of the return charging output signal is greater than tV; in the receiving mode, returning to charging The voltage value of the output signal is a voltage value less than tV.
  • the power management unit 30 further includes a diode 32 and a power switch 33, the power switch 33 is controlled by the control unit 20, and the power switch 33 is generally implemented by a power Pmosfet and integrated with the diode 32. .
  • the power switch 33 when the level of the control unit 20 input to the power switch 33 is at a high level, the power switch 33 is turned off, and only the energy of the energy storage unit 40 is allowed to be supplied to the power conversion unit 50 through the diode 32 for low-power supply, and the power conversion unit 50 is a bridge circuit, which can avoid the occurrence of backwashing;
  • the power switch 33 When the level of the control unit 20 input to the power switch 33 is low, the power switch 33 is turned on, allowing the energy storage unit 40 to supply high power to the bridge circuit through the power switch 33, or the bridge circuit passes the power switch 33 performs high power charging to the energy storage unit 40.
  • the present invention provides a preferred embodiment of a wireless charging transmitter.
  • the control unit 20 and the wireless charging coil 10 further include an envelope filter circuit 60.
  • the wireless charging coil 10 transmits an output power adjustment signal to the power adjustment module 21 through the envelope filter circuit 60, and the wireless charging coil 10 passes the package.
  • the filter circuit 60 transmits a charge input signal to the control unit 20, which is the voltage peak of the electrical connection point between the magnetic coil of the wireless charging coil 10 and the resonant capacitor.
  • the control unit 20 includes a logic and driving sub-module 22 connected to the bridge circuit, and the comparator circuit 70 outputs wireless charging to the control unit 20.
  • the digital signal generated after the voltage across the coil 10 is compared, the logic and drive sub-module 22 turns on and off the power switch of the bridge circuit according to the digital signal to realize synchronous rectification.
  • a bridge circuit implemented by four power switches controlled by control unit 20, and a wireless charging coil 10 comprised of a magnetic coil and a resonant capacitor, typically a power switch.
  • the wireless charging coil 10 is further connected with a set of envelope filtering circuits 60.
  • the wireless charging coil 10 transmits an output power adjustment signal to the power adjustment module 21 through the envelope filtering circuit 60, and the wireless charging coil 10 passes through the envelope filtering circuit 60.
  • a charging input signal is transmitted to the control unit 20.
  • a comparator circuit 70 is further included between the control unit 20 and the wireless charging coil 10.
  • the comparator circuit 70 outputs a digital signal generated by comparing the voltages across the wireless charging coil 10 to the control unit 20.
  • a switching type load circuit 80 is further included between the control unit 20 and the wireless charging coil 10, and the switching type load circuit 80 is configured to modulate the input power adjustment signal onto the wireless charging coil 10.
  • control unit 20 includes a logic and drive sub-module 22 coupled to the bridge circuit, the logic and drive sub-module 22 being part of the control circuit, enabled only in the in-charge mode, and externally Stop working in charging mode.
  • the logic and drive sub-module 22 When the level of the digital signal changes, the logic and drive sub-module 22 also immediately generates a corresponding change, and controls the power switch in the bridge circuit to be turned on or off to achieve synchronous rectification.
  • the low level switch is input to the control terminal 81 of the switching load circuit 80 to modulate the input power adjustment signal to the wireless charging coil 10.
  • the present invention provides a preferred embodiment of a smart charging input method.
  • a smart charging input method for a wireless charging transmitting device comprising the steps of:
  • the wireless charging transmitting device When the voltage value of the monitor signal is converted and greater than the first preset voltage value, the wireless charging transmitting device enters a wireless power input mode (ie, an internal charging mode);
  • the monitor signal is a VL signal
  • the first preset voltage value aV is set. If the voltage value of the feedback VL signal is greater than or equal to the first preset voltage value aV, it indicates that the wireless charging coil 10 is within the sensing range.
  • the wireless charging transmitting device can receive the wireless energy of the external wireless charging output device, indicating that the electromagnetic field transmitting device appears within the sensing range of the wireless charging coil 10, and continues to The other electromagnetic field transmitting device transmits the input power adjustment signal; until the other electromagnetic field transmitting device is removed from the sensing range of the wireless charging coil 10, or the energy storage unit 40 is fully charged, the wireless charging transmitting device re-enters the listening state.
  • the present invention provides a preferred embodiment of a smart charging output method.
  • a smart charging output method for a wireless charging transmitter comprising the steps of:
  • the current value of the current two detection feedback signals is converted and greater than the first preset current value or less than the second preset current value, and the current value of the detection feedback signal is smaller than the second after the detection signal is stopped.
  • the wireless charging transmitting device enters a wireless power output mode (ie, an external charging mode).
  • an interval time t seconds is set, and the detection feedback signal is set as an IL signal; the interval is switched to the transmission mode, the interval time is t seconds, and the detection signal is transmitted outward, and the feedback is performed.
  • the IL signal wherein, in the transmitting mode, the power management unit 30 is in the large resistance type unidirectional energy transmission mode, and the power storage unit 40 performs low power supply to the bridge circuit to avoid the wireless charging output of the other party.
  • the device appears and also outputs the wireless charging energy or signal, causing the electrical energy to backflush the energy storage unit 40.
  • a first preset current value yA a first preset current value yA, a second preset current value xA, and a third preset current value zA. If the detection signal is sent twice before and after, the current value of the IL signal is greater than the first preset current value. yA is less than the second preset current value xA, and the current value of the IL signal after the detection signal is stopped is smaller than the third preset current value zA, indicating that the other magnetic field is present in the sensing range of the wireless charging coil 10. Or a conductive device, and possibly a wireless charging input device.
  • the method further includes the steps of:
  • the wireless charging transmitter enters a radio energy output mode.
  • the interval time k seconds is set.
  • the wireless charging transmitting device will be separated by k seconds. , switch to the transmit mode again, and transmit the probe signal outward;
  • the three preset current values zA indicate that the other magnetic conductive or conductive device appears in the sensing range of the wireless charging coil 10, and is a wireless charging input device.
  • the k seconds and t seconds are not equal, and are used to prevent the other party from being a wireless charging output device and also outputting the wireless charging energy or signal at intervals of exactly t seconds.
  • the power management unit 30 is set to a small resistance type energy transmission mode, the power storage unit 40 performs high power supply to the bridge circuit, and starts to wirelessly charge energy to the other wireless charging input device. Outputting, and controlling the bridge circuit for power adjustment according to an output power adjustment signal provided by the other party's wireless charging input device until the other electromagnetic field transmitting device is removed from the sensing range of the wireless charging coil 10, or is not received The power adjustment signal is output, and the wireless charging transmitter re-enters the listening state.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

一种无线充电发射装置，包括控制单元（20）、无线充电线圈（10）、电源管理单元（30）和能量存储单元（40）；电源管理单元（30）用于控制电能的传递方向，该无线充电线圈（10）通过电源管理单元（30）将接收的电能存储到能量存储单元（40）中，或该电源管理单元（30）通过无线充电线圈（10）释放能量存储单元（40）中的电能。还涉及一种智能充电输入方法和智能充电输出方法。通过设计一种无线充电发射装置，在已有共用电路型模式基础上，采取监听共用的无线充电接收/发射线圈上的信号的方式来进行切换；同时，通过"随机发出探测信号"和"剩余时间主动监听"等两种探测技术，实时发现另一方无线充电设备的技术效果。

Description

一种无线充电发射装置及其智能充电输入和输出方法 技术领域
本发明涉及无线充电领域，具体涉及一种无线充电发射装置及其智能充电输入和输出方法。
 背景技术
无线充电系统包括无线充电发射器和无线充电接收器两部分，其技术实现一般采用直流转交流，让交流电驱动发射线圈传递交变电磁能给接收线圈，然后再将感应到的交流电转直流给接收设备供电。
在无线充电发射器产品的具体实现上，一般分为直流电源模块、直流电源输电线、无线充电发射电路模块、发射线圈模块四个部分，其中所述直流电源模块一般为适配器、大容量电池，所述直流电源输电线为只适合传导功率直流电与低频信号交流电的常规电线，比如USB线。而所述无线充电发射电路模块与所述发射线圈模块两个部分一般会安装在同一个外壳内，或者个极少情况下是安装在分成两个或多个部分的但是紧密机械连接在一起的一组外壳内，这样便于生产与安装，符合现有无线充电发射器的架构设计需求，具有实际操作性。
无线充电接收器产品在具体实现上，一般分为无线充电接收线圈模块、无线充电接收电路模块、直流电调整电路模块、负载模块四部分，其中所述负载模块一般是二次电池。无线充电接收器的特点是所述无线充电接收电路模块具有根据接收器的负载变化与接收器的设定，向无线充电发射器传递调节信号的能力，用于让无线充电发射器收到后主动调节输出功率的能力。
当前市场上存在众多内置电池的无线充电发射器产品，用于出差旅行途中为无线充电接收设备比如手机、相机进行临时充电。所述这类内置电池的无线充电发射器产品，一般采用micro-USB接口作为电能输入，并且内置一组专门的5V输入型电压调节电路用于为电池充电。因此所述这类内置电池的无线充电发射器产品电路面积较大，产品成本较高，而且往往只能为单节3.7V锂电池进行充电而导致还需要专门设计一套3.7V的升压电路为无线充电发射电路模块进行能量型供电进而造成功率效率大幅度降低，并且由于有micro-USB接口的存在造成产品外观缺损、容易进灰进水导致短路甚至锂电池过热爆炸。
因此有人发明了内置电池的无线充电发射器产品同时具有无线充电接收器功能，采用独立电路或共用电路实现无线充电接收功能。所述独立电路是无线充电接收器的无线充电接收线圈模块、无线充电接收电路模块、直流电调整电路模块完全独立，并不与同一个产品内的无线充电发射器的无线充电发射电路模块、发射线圈模块有共用情况，然后通过用户主动切换方式在无线充电发射模式和无线充电接收模式下进行切换，这种方法实现简单，往往采用在产品正反两面分别布置无线充电发射器和无线充电接收器来实现，但是缺点是成本增加了一倍，产品体积与厚度也增加了；所述共用电路是无线充电接收器的无线充电接收线圈模块、无线充电接收电路模块与同一个产品内的无线充电发射器的无线充电发射电路模块、发射线圈模块是共用的，也就是无线充电接收/发射线圈模块在物理上是同一个、无线充电接收/发射电路模块在物理上是同一个，然后采取用户主动切换开关、重力开关这两种方式中的一种或者两种在无线充电发射器或无线充电接收器之间进行功能切换，这种方法实现难度高，但是具有成本低、体积小的优点。
但是上述共用电路型方式的产品由于采用用户主动切换开关、重力开关这两种方式进行功能切换，存在切换失败的可能，如用户忘记主动切换，或者产品的摆放方向处于与重力开关设计相反的方向，都会造成安全隐患。假如另一方的无线充电装置是一个无线充电发射器，而所述共用型电路方式的产品也恰好切换到无线充电发射器模式，就会存在另一方的无线充电装置向所述共用型电路方式的产品反灌能量，且所述共用型电路方式的产品将反灌进来的能量不经过直流电调整电路模块就直接提供给电池，造成电池损坏甚至爆炸的可能。
 技术问题
本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种无线充电发射装置，实现智能化切换充电模式。
本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种无线充电发射装置的智能充电输入方法，解决了双方无线充电设备都处于无线充电发射模式下发生危险的风险问题。
本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种无线充电发射装置的智能充电输出方法，解决了双方无线充电设备都处于无线充电发射模式下发生危险的风险问题。 
 技术解决方案
本发明解决其技术问题所采用的技术方案是：提供一种无线充电发射装置，包括控制单元、无线充电线圈、电源管理单元和能量存储单元，该控制单元分别与无线充电线圈和电源管理单元连接，该电源管理单元分别与无线充电线圈和能量存储单元连接；其中，
该无线充电线圈感应到外部的无线充电输出设备，并对控制单元返回充电输入信号，该控制单元控制无线充电线圈接收电能并存储到能量存储单元中；
该电源管理单元通过无线充电线圈向外发射探测信号，在探测到外部的无线充电输入设备后对控制单元返回充电输出信号，该控制单元控制无线充电线圈释放能量存储单元中的电能；
该电源管理单元用于控制电能的传递方向，该无线充电线圈通过电源管理单元将接收的电能存储到能量存储单元中，或该电源管理单元通过无线充电线圈释放能量存储单元中的电能。
其中，较佳方案是：该无线充电发射装置还包括电能转换单元，该电能转换单元分别与无线充电线圈和电源管理单元连接，该电能转换单元用于将能量存储单元的直流电转换为无线传输所需的高频交流电，或者该电能转换单元用于将接收的高频交流电转换为直流电转。
其中，较佳方案是：该电能转换单元为桥式电路，该桥式电路包括四个功率开关，该功率开关均与控制单元连接并受其控制。
其中，较佳方案是：该控制单元包括功率调节模块，该功率调节模块通过无线充电线圈向外部的无线充电输出设备传递输入功率调节信号，或该功率调节模块通过无线充电线圈接收外部的无线充电输入设备的输出功率调节信号，并控制电能转换单元调节输出高频交流电的功率。
其中，较佳方案是：该电源管理单元包括一电流检测电路，该电流检测电路分别与控制单元和无线充电线圈连接，该电流检测电路根据无线充电线圈反馈的电流值，对控制单元返回充电输出信号。
其中，较佳方案是：该控制单元与无线充电线圈之间还包括一包络滤波电路，该无线充电线圈通过包络滤波电路向功率调节模块传输输出功率调节信号，以及该无线充电线圈通过包络滤波电路向控制单元传输充电输入信号，该充电输入信号为无线充电线圈的磁性线圈与谐振电容电连接点的电压峰值。
其中，较佳方案是：该控制单元与无线充电线圈之间还包括一比较器电路，该控制单元包括与桥式电路连接的逻辑与驱动子模块，该比较器电路向控制单元输出由无线充电线圈的两端电压比较后产生的数字信号，该逻辑与驱动子模块根据所述数字信号控制桥式电路的功率开关进行开通和关断，实现同步整流。
本发明解决其技术问题所采用的技术方案是：提供一种无线充电发射装置的智能充电输入方法，包括步骤：
切换到接收模式，并通过无线充电线圈进入监听状态，反馈一监听信号；
当监听信号的电压值产生变换并大于第一预设电压值，该无线充电发射装置进入无线电能输入模式；
在预设时间内无线充电发射装置没有进入无线电能输入模式时，设置第二预设电压值，当监听信号小于第二预设电压值时，该无线充电发射装置重新进入监听状态。
本发明解决其技术问题所采用的技术方案是：提供一种无线充电发射装置的智能充电输出方法，包括步骤：
在监听状态过程中，间隔性切换到发射模式，并向外发射探测信号,反馈一探测反馈信号，同时该无线充电发射装置处于大电阻型单向能量传输模式；
当前后两次的探测反馈信号的电流值均产生变换并大于第一预设电流值或小于第二预设电流值，同时在停止发射探测信号后，该探测反馈信号的电流值小于第三预设电流值，该无线充电发射装置进入无线电能输出模式。
其中，较佳方案是，在完成前后两次探测工作后，及无线充电发射装置进入无线电能输出模式前，还包括步骤：
再次切换到发射模式，并向外发射探测信号，该第二次与第三次发射探测信号的间隔时间与前两次发射探测信号的间隔时间不同；
当第三次反馈的探测反馈信号的电流值产生变换并大于第一预设电流值或小于第二预设电流值，同时在停止发射探测信号后，该探测反馈信号的电流值小于第三预设电流值，该无线充电发射装置进入无线电能输出模式。
 有益效果
本发明的有益效果在于，与现有技术相比，本发明通过设计一种无线充电发射装置及其智能充电输入和输出方法，在已有共用电路型模式基础上，采取监听共用的无线充电接收/发射线圈上的信号的方式来进行切换，避免另一方无线充电设备和当前无线充电发射装置同时处于发射状态进而导致危险；同时，通过“随机发出探测信号”和“剩余时间主动监听”等两种探测技术，实时发现另一方无线充电设备的技术效果，并且在不同探测手段下自动进入对应的工作模式，从而解决了双方无线充电设备都处于无线充电发射模式下发生危险的风险问题。
 附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明无线充电发射装置的电路框图；
图2是图1进一步扩展的电路框图；
图3是本发明功率调节模块的电路框图；
图4是本发明电流检测电路的电路框图；
图5是图4的电路示意图；
图6是本发明包络滤波电路的电路框图；
图7是本发明比较器电路与逻辑与驱动子模块的电路框图；
图8是图6和图7结合的电路示意图；
图9是本发明逻辑与驱动子模块的电路示意图；
图10是本发明智能充电输入方法的流程图；
图11是本发明智能充电输出方法的流程图；
图12是图11第三次向外发射探测信号的流程图。
 本发明的最佳实施方式
现结合附图，对本发明的较佳实施例作详细说明。
如图1所示，本发明提供一种无线充电发射装置的优选实施例。 
一种无线充电发射装置，包括控制单元20、无线充电线圈10、电源管理单元30和能量存储单元40，该控制单元20分别与无线充电线圈10和电源管理单元30连接，该电源管理单元30分别与无线充电线圈10和能量存储单元40连接。
具体地，该无线充电线圈10感应到外部的无线充电输出设备，并对控制单元20返回充电输入信号，该控制单元20控制无线充电线圈10接收电能并存储到能量存储单元40中。此时，无线充电线圈10处理接收模式，并在感应到外部的无线充电输出设备后，无线充电发射装置进入对内充电模式。
以及，电源管理单元30通过无线充电线圈10向外发射探测信号，在探测到外部的无线充电输入设备后对控制单元20返回充电输出信号，该控制单元20控制无线充电线圈10释放能量存储单元40中的电能。此时，无线充电线圈10处理发射模式，并在感应到外部的无线充电输入设备后，无线充电发射装置进入对外充电模式。
进一步地，该电源管理单元30用于控制电能的传递方向，该无线充电线圈10通过电源管理单元30将接收的电能存储到能量存储单元40中，即对内充电模式；或该电源管理单元30通过无线充电线圈10释放能量存储单元40中的电能，即对外充电模式。其中，能量存储单元40用于存储电能。
在本实施例中，已有共用电路型模式基础上，采取监听共用的无线充电接收/发射线圈上的信号的方式来进行切换，避免另一方无线充电设备和当前无线充电发射装置同时处于发射状态进而导致危险。
其中，外部的无线充电输出设备是发射电磁波的设备，且被无线充电线圈10接收到并转化为电能；外部的无线充电输入设备是接收电磁波的设备，无线充电线圈10发射电磁波且被外部的无线充电输入设备接收到并转化为电能。
如图2所示，本发明提供一种无线充电发射装置的较佳实施例。
该无线充电发射装置还包括电能转换单元50，该电能转换单元50分别与无线充电线圈10和电源管理单元30连接，该电能转换单元50用于将能量存储单元40的直流电转换为无线传输所需的高频交流电，或者该电能转换单元50用于将接收的高频交流电转换为直流电转。
在对内充电模式下，外部的无线充电输出设备产生电磁场并被无线充电线圈10接收，无线充电线圈10将接收的电磁场转化为高频交流电，电能转换单元50用于将接收的高频交流电转换为直流电转，并存储到能量存储单元40中，即外部的无线充电输出设备充电对无线充电发射装置充电。
在对外充电模式下，电能转换单元50用于将能量存储单元40的直流电转换为无线传输所需的高频交流电，无线充电线圈10将高频交流电转化为电磁场并向外发送，并被外部的无线充电输入设备接收，即无线充电发射装置对外部的无线充电输入设备充电。
进一步地，该电能转换单元50为桥式电路，该桥式电路包括四个功率开关，该功率开关均与控制单元20连接并受其控制。
如图3所示，本发明提供一种功率调节模块的较佳实施例。
控制单元20包括功率调节模块21，该功率调节模块21通过无线充电线圈10向外部的无线充电输出设备传递输入功率调节信号，或该功率调节模块21通过无线充电线圈10接收外部的无线充电输入设备的输出功率调节信号，并控制电能转换单元50调节输出高频交流电的功率。
在对内充电模式下，外部的无线充电输出设备充电对无线充电发射装置充电，同时功率调节模块21通过无线充电线圈10向外部的无线充电输出设备传递输入功率调节信号，外部的无线充电输出设备根据输入功率调节信号，调节无线充电线圈10接收的高频交流电的功率。
在对外充电模式下，无线充电发射装置对外部的无线充电输入设备充电，同时功率调节模块21通过无线充电线圈10接收外部的无线充电输入设备的输出功率调节信号，功率调节模块21根据输出功率调节信号控制电能转换单元50调节输出高频交流电的功率。
如图4和图5所示，本发明提供一种电流检测电路的较佳实施例。
电源管理单元30包括一电流检测电路31，该电流检测电路31分别与控制单元20和无线充电线圈10连接，该电流检测电路31根据无线充电线圈10反馈的电流值，对控制单元20返回充电输出信号。
具体地，电源管理单元30通过无线充电线圈10向外发射探测信号，并反馈对应的探测反馈信号，电流检测电路31接收探测反馈信号，并根据接收探测反馈信号的电流值，对控制单元20返回充电输出信号，该控制单元20根据返回充电输出信号控制无线充电线圈10释放能量存储单元40中的电能。
参考图5，电流检测电路31采用串联小电阻311检测电流，并且将检测到的信号通过放大器312进行滤波与放大，以及为了实现双向电流的检测还加入了基准电源313，用于直流电压抬升的设计。其中，没有电流时，反馈的返回充电输出信号的电压值为一个非零的电压tV；而在发射模式下，返回充电输出信号的电压值为大于tV的电压值；在接收模式下，返回充电输出信号的电压值为小于tV的电压值。
参考图5，电源管理单元30还包括一个二极管32和一个功率开关33，所述功率开关33受到控制单元20控制，并且所述功率开关33一般采用功率Pmosfet实现，以及与二极管32为一体式设计。
具体地，当控制单元20输入到功率开关33的电平为高电平时，功率开关33断开，仅允许能量存储单元40的能量通过二极管32向电能转换单元50进行小功率供电，电能转换单元50为桥式电路，可以避免反灌的发生；
当控制单元20输入到功率开关33的电平为低电平时，功率开关33导通，允许能量存储单元40通过功率开关33向所述桥式电路进行高功率供电，或者桥式电路通过功率开关33向所述能量存储单元40进行高功率充电。
如图6、图7、图8和图9所示，本发明提供一种无线充电发射装置的较佳实施例。
该控制单元20与无线充电线圈10之间还包括一包络滤波电路60，该无线充电线圈10通过包络滤波电路60向功率调节模块21传输输出功率调节信号，以及该无线充电线圈10通过包络滤波电路60向控制单元20传输充电输入信号，该充电输入信号为无线充电线圈10的磁性线圈与谐振电容电连接点的电压峰值。
该控制单元20与无线充电线圈10之间还包括一比较器电路70，该控制单元20包括与桥式电路连接的逻辑与驱动子模块22，该比较器电路70向控制单元20输出由无线充电线圈10的两端电压比较后产生的数字信号，该逻辑与驱动子模块22根据所述数字信号控制桥式电路的功率开关进行开通和关断，实现同步整流。
参考图8，包括由4个受到控制单元20控制的功率开关实现的桥式电路，以及由磁性线圈与谐振电容组成的无线充电线圈10，功率开关一般为功率开关管。
具体地，无线充电线圈10还连接有一组包络滤波电路60，无线充电线圈10通过包络滤波电路60向功率调节模块21传输输出功率调节信号，以及该无线充电线圈10通过包络滤波电路60向控制单元20传输充电输入信号。
以及，控制单元20与无线充电线圈10之间还包括一比较器电路70，比较器电路70向控制单元20输出由无线充电线圈10的两端电压比较后产生的数字信号。
以及，控制单元20与无线充电线圈10之间还包括一开关型负载电路80，开关型负载电路80用于将输入功率调节信号调制到无线充电线圈10上。
参考图9，控制单元20包括与桥式电路连接的逻辑与驱动子模块22，逻辑与驱动子模块22属于所述控制电路的一部分，仅在在对内充电模式下使能工作，在在对外充电模式下停止工作。
当所述数字信号的电平变化时，逻辑与驱动子模块22也会立刻产生相应的变化，控制所述桥式电路中功率开关进行开通或者关断，实现同步整流。其中，向开关型负载电路80的控制端81输入低电平接通开关，将输入功率调节信号调制到无线充电线圈10上。
如图10所示，本发明提供一种智能充电输入方法的优选实施例。
一种无线充电发射装置的智能充电输入方法，包括步骤：
S11、切换到接收模式，并通过无线充电线圈10进入监听状态，反馈一监听信号；
S12、当监听信号的电压值产生变换并大于第一预设电压值，该无线充电发射装置进入无线电能输入模式（即对内充电模式）；
S13、在预设时间内无线充电发射装置没有进入无线电能输入模式时，设置第二预设电压值，当监听信号小于第二预设电压值时，该无线充电发射装置重新进入监听状态。
具体地，监听信号为VL信号，并设置第一预设电压值aV，若反馈的VL信号的电压值一旦出现大于等于第一预设电压值aV时，说明无线充电线圈10的感应范围内出现了另一方的电磁场发射装置，并且有可能是无线充电输出设备；此时，无线充电发射装置进入对内充电模式，并尝试接收外部的无线充电输出设备的无线电能。
设置一预设时间Q秒以及第二预设电压值bV，若在预设时间Q秒内没有进入对内充电模式，说明无线充电线圈10的感应范围内出现的并不是电磁场发射装置；此时，设置VL信号的电压值大于或等于第二预设电压值bV，直至VL信号小于第二预设电压值bV时，即无线充电线圈10的感应范围内出现的非电磁场发射装置离开感应范围，无线充电发射装置重新进入监听状态。
若在预设时间Q秒内进入对内充电模式，即无线充电发射装置可以接收外部的无线充电输出设备的无线电能，说明无线充电线圈10的感应范围内出现的是电磁场发射装置，并且持续向另一方的电磁场发射装置传递输入功率调节信号；直至另一方的电磁场发射装置被移开无线充电线圈10的感应范围，或者能量存储单元40的电量存储满后，无线充电发射装置重新进入监听状态。
如图11和图12所示，本发明提供一种的智能充电输出方法的优选实施例。
提供一种无线充电发射装置的智能充电输出方法，包括步骤：
S21、在监听状态过程中，间隔性切换到发射模式，并向外发射探测信号,反馈一探测反馈信号，同时该无线充电发射装置处于大电阻型单向能量传输模式；
S22、当前后两次的探测反馈信号的电流值均产生变换并大于第一预设电流值或小于第二预设电流值，同时在停止发射探测信号后，该探测反馈信号的电流值小于第三预设电流值；
S25、该无线充电发射装置进入无线电能输出模式（即对外充电模式）。
具体地，在持续监听VL信号的过程中，设置一间隔时间t秒，以及设置探测反馈信号为IL信号；间隔性切换到发射模式，间隔时间为t秒，并向外发射探测信号,反馈一IL信号；其中，在发射模式下电源管理单元30处于大电阻型单向能量传输模式，由能量存储单元40向所述桥式电路进行小功率供电，以避免所述恰好另一方的无线充电输出设备出现，并且也正好输出无线充电能量或者信号，从而导致电能反灌损坏能量存储单元40。
设置第一预设电流值yA、第二预设电流值xA和第三预设电流值zA，若在前后两次发出所述探测信号时，IL信号的电流值都大于第一预设电流值yA或者小于第二预设电流值xA，且停止发出所述探测信号后IL信号的电流值均小于第三预设电流值zA，说明无线充电线圈10的感应范围内出现了另一方的导磁性或者导电性装置，并且有可能是无线充电输入设备。
进一步地，完成前后两次探测工作后，无线充电发射装置进入无线电能输出模式（步骤S25）前，还包括步骤：
S23、再次切换到发射模式，并向外发射探测信号，该第二次与第三次发射探测信号的间隔时间与前两次发射探测信号的间隔时间不同；
S24、当第三次反馈的探测反馈信号的电流值产生变换并大于第一预设电流值或小于第二预设电流值，同时在停止发射探测信号后，该探测反馈信号的电流值小于第三预设电流值；
S25、该无线充电发射装置进入无线电能输出模式。
具体地，设置间隔时间k秒，为了确保无线充电线圈10的感应范围内出现了另一方的导磁性或者导电性装置是无线充电输入设备的可靠性，无线充电发射装置将会隔时间k秒后，再次切换到发射模式，并向外发射探测信号；
若第三次反馈的探测反馈信号的IL信号的电流值都大于第一预设电流值yA或者小于第二预设电流值xA，且停止发出所述探测信号后IL信号的电流值均小于第三预设电流值zA，说明无线充电线圈10的感应范围内出现了另一方的导磁性或者导电性装置，并且是无线充电输入设备。
其中，所述k秒与t秒不相等，用于避免另一方是无线充电输出设备并且也正好间隔t秒发出输出无线充电能量或者信号。
进一步地，将所述电源管理单元30设置为小电阻型能量传输模式，由能量存储单元40向所述桥式电路进行高功率供电，并且开始对另一方的无线充电输入设备进行无线充电能量的输出，以及根据另一方的无线充电输入设备提供的输出功率调节信号，控制所述桥式电路进行功率调节，直至另一方的电磁场发射装置被移开无线充电线圈10的感应范围，或者接收不到输出功率调节信号，无线充电发射装置重新进入监听状态。
 以上所述者，仅为本发明最佳实施例而已，并非用于限制本发明的范围，凡依本发明申请专利范围所作的等效变化或修饰，皆为本发明所涵盖。

Claims (10)

  1. 一种无线充电发射装置，其特征在于，包括控制单元、无线充电线圈、电源管理单元和能量存储单元，该控制单元分别与无线充电线圈和电源管理单元连接，该电源管理单元分别与无线充电线圈和能量存储单元连接；其中，
    该无线充电线圈感应到外部的无线充电输出设备，并对控制单元返回充电输入信号，该控制单元控制无线充电线圈接收电能并存储到能量存储单元中；
    该电源管理单元通过无线充电线圈向外发射探测信号，在探测到外部的无线充电输入设备后对控制单元返回充电输出信号，该控制单元控制无线充电线圈释放能量存储单元中的电能；
    该电源管理单元用于控制电能的传递方向，该无线充电线圈通过电源管理单元将接收的电能存储到能量存储单元中，或该电源管理单元通过无线充电线圈释放能量存储单元中的电能。
  2. 根据权利要求1所述的无线充电发射装置，其特征在于：该无线充电发射装置还包括电能转换单元，该电能转换单元分别与无线充电线圈和电源管理单元连接，该电能转换单元用于将能量存储单元的直流电转换为无线传输所需的高频交流电，或者该电能转换单元用于将接收的高频交流电转换为直流电转。
  3. 根据权利要求1所述的无线充电发射装置，其特征在于：该电能转换单元为桥式电路，该桥式电路包括四个功率开关，该功率开关均与控制单元连接并受其控制。
  4. 根据权利要求2所述的无线充电发射装置，其特征在于：该控制单元包括功率调节模块，该功率调节模块通过无线充电线圈向外部的无线充电输出设备传递输入功率调节信号，或该功率调节模块通过无线充电线圈接收外部的无线充电输入设备的输出功率调节信号，并控制电能转换单元调节输出高频交流电的功率。
  5. 根据权利要求1所述的无线充电发射装置，其特征在于：该电源管理单元包括一电流检测电路，该电流检测电路分别与控制单元和无线充电线圈连接，该电流检测电路根据无线充电线圈反馈的电流值，对控制单元返回充电输出信号。
  6. 根据权利要求4所述的无线充电发射装置，其特征在于：该控制单元与无线充电线圈之间还包括一包络滤波电路，该无线充电线圈通过包络滤波电路向功率调节模块传输输出功率调节信号，以及该无线充电线圈通过包络滤波电路向控制单元传输充电输入信号，该充电输入信号为无线充电线圈的磁性线圈与谐振电容电连接点的电压峰值。
  7. 根据权利要求1或3所述的无线充电发射装置，其特征在于：该控制单元与无线充电线圈之间还包括一比较器电路，该控制单元包括与桥式电路连接的逻辑与驱动子模块，该比较器电路向控制单元输出由无线充电线圈的两端电压比较后产生的数字信号，该逻辑与驱动子模块根据所述数字信号控制桥式电路的功率开关进行开通和关断，实现同步整流。
  8. 一种无线充电发射装置的智能充电输入方法，其特征在于，包括步骤：
    切换到接收模式，并通过无线充电线圈进入监听状态，反馈一监听信号；
    当监听信号的电压值产生变换并大于第一预设电压值，该无线充电发射装置进入无线电能输入模式；
    在预设时间内无线充电发射装置没有进入无线电能输入模式时，设置第二预设电压值，当监听信号小于第二预设电压值时，该无线充电发射装置重新进入监听状态。
  9. 一种无线充电发射装置的智能充电输出方法，其特征在于，包括步骤：
    在监听状态过程中，间隔性切换到发射模式，并向外发射探测信号,反馈一探测反馈信号，同时该无线充电发射装置处于大电阻型单向能量传输模式；
    当前后两次的探测反馈信号的电流值均产生变换并大于第一预设电流值或小于第二预设电流值，同时在停止发射探测信号后，该探测反馈信号的电流值小于第三预设电流值，该无线充电发射装置进入无线电能输出模式。
  10. 根据权利要求9所述的智能充电输出方法，其特征在于，完成前后两次探测工作后，及无线充电发射装置进入无线电能输出模式前，还包括步骤：
    再次切换到发射模式，并向外发射探测信号，该第二次与第三次发射探测信号的间隔时间与前两次发射探测信号的间隔时间不同；
    当第三次反馈的探测反馈信号的电流值产生变换并大于第一预设电流值或小于第二预设电流值，同时在停止发射探测信号后，该探测反馈信号的电流值小于第三预设电流值，该无线充电发射装置进入无线电能输出模式。
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