CN106849387B - Wireless charging transmitting device and intelligent charging input and output method thereof - Google Patents
Wireless charging transmitting device and intelligent charging input and output method thereof Download PDFInfo
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- CN106849387B CN106849387B CN201710113966.XA CN201710113966A CN106849387B CN 106849387 B CN106849387 B CN 106849387B CN 201710113966 A CN201710113966 A CN 201710113966A CN 106849387 B CN106849387 B CN 106849387B
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- 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
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- 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
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Abstract
The invention relates to the field of wireless charging, in particular to a wireless charging transmitting device, which comprises a control unit, a wireless charging coil, a power management unit and an energy storage unit, wherein the control unit is connected with the wireless charging coil; the power management unit is used for controlling the transmission direction of the electric energy, and the wireless charging coil stores the received electric energy into the energy storage unit through the power management unit, or the power management unit releases the electric energy in the energy storage unit through the wireless charging coil. And also relates to an intelligent charging input method and an intelligent charging output method. The invention designs a wireless charging transmitting device, which is switched by adopting a mode of monitoring signals on a shared wireless charging receiving/transmitting coil on the basis of the existing shared circuit mode; meanwhile, the technical effects of the wireless charging equipment of the other party are found in real time through two detection technologies such as 'randomly sending detection signals' and 'actively monitoring the remaining time'.
Description
Technical Field
The invention relates to the field of wireless charging, in particular to a wireless charging transmitting device and an intelligent charging input and output method thereof.
Background
The wireless charging system comprises a wireless charging transmitter and a wireless charging receiver, and the technology is realized by adopting direct current to alternating current generally, so that alternating current drives a transmitting coil to transmit alternating electromagnetic energy to a receiving coil, and then the sensed alternating current is converted into direct current to supply power to receiving equipment.
In the specific implementation of the wireless charging transmitter product, the wireless charging transmitter product is generally divided into four parts, namely a direct-current power supply module, a direct-current power supply transmission line, a wireless charging transmitting circuit module and a transmitting coil module, wherein the direct-current power supply module is generally an adapter and a high-capacity battery, and the direct-current power supply transmission line is a conventional wire, such as a USB wire, which is only suitable for conducting power direct current and low-frequency signal alternating current. The wireless charging transmitting circuit module and the transmitting coil module are generally arranged in the same shell, or are rarely arranged in a group of shells which are divided into two or more parts but are closely and mechanically connected together, so that the wireless charging transmitting circuit module is convenient to produce and install, meets the architecture design requirement of the existing wireless charging transmitter, 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 in specific implementation, wherein the load module is generally a secondary battery. The wireless charging receiver is characterized in that the wireless charging receiving circuit module is provided with the capability of transmitting an adjusting signal to the wireless charging transmitter according to the load change of the receiver and the setting of the receiver, and the capability of actively adjusting the output power after the wireless charging transmitter receives the adjusting signal.
There are numerous wireless charging transmitter products on the market today with built-in batteries for temporarily charging wireless charging receiving devices such as cell phones, cameras during business trips. The wireless charging transmitter product with built-in batteries generally adopts a micro-USB interface as electric energy input, and a special 5V input type voltage regulating circuit is built in to charge the batteries. Therefore, the wireless charging transmitter product of the built-in battery has larger circuit area and higher product cost, and can only charge a single 3.7V lithium battery, so that a set of 3.7V booster circuit is required to be specially designed for supplying power to the wireless charging transmitting circuit module, the power efficiency is greatly reduced, and the appearance defect of the product is caused by the existence of a micro-USB interface, the short circuit and even the overheat explosion of the lithium battery are caused by easy ash and water inlet.
Therefore, the wireless charging transmitter product with the built-in battery has the wireless charging receiver function, and the wireless charging receiving function is realized by adopting 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 direct current adjusting circuit module of the wireless charging receiver, is completely independent, does not share the wireless charging transmitting circuit module and the transmitting coil module of the wireless charging transmitter in the same product, and is switched between a wireless charging transmitting mode and a wireless charging receiving mode in an active switching mode by a user; the shared circuit is a wireless charging receiving coil module of the wireless charging receiver, the wireless charging receiving circuit module is shared with a wireless charging transmitting circuit module and a transmitting coil module of a wireless charging transmitter in the same product, namely the wireless charging receiving/transmitting coil module is physically the same, the wireless charging receiving/transmitting circuit module is physically the same, and then one or two of a user active change-over switch and a gravity switch are adopted to switch functions between the wireless charging transmitter or the wireless charging receiver.
However, the product adopting the shared circuit mode adopts the two modes of active switching of the user and the gravity switch to switch the functions, so that the possibility of switching failure exists, such as that the user forgets to actively switch, or the placing direction of the product is in the direction opposite to the design of the gravity switch, so that potential safety hazards can be caused. If the other wireless charging device is a wireless charging transmitter, and the product in the common circuit mode is just switched to the wireless charging transmitter mode, the other wireless charging device reversely charges energy to the product in the common circuit mode, and the product in the common circuit mode directly provides the reversely charged energy to the battery without passing through the direct current regulating circuit module, so that the battery is possibly damaged or even exploded.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a wireless charging transmitting device for realizing intelligent switching of charging modes aiming at the defects in the prior art.
The technical problem to be solved by the invention is to provide an intelligent charging input method of a wireless charging transmitting device aiming at the defects in the prior art, so that the risk problem that both wireless charging devices are in a wireless charging transmitting mode and dangerous is solved.
The technical problem to be solved by the invention is to provide an intelligent charging input method of a wireless charging transmitting device aiming at the defects in the prior art, so that the risk problem that both wireless charging devices are in a wireless charging transmitting mode and dangerous is solved.
The technical scheme adopted for solving the technical problems is as follows: the wireless charging transmitting device comprises a control unit, a wireless charging coil, a power management unit and an energy storage unit, wherein the control unit is respectively connected with the wireless charging coil and the power management unit, and the power management unit is respectively connected with the wireless charging coil and the energy storage unit; wherein,
The wireless charging coil senses external wireless charging output equipment and returns a charging input signal to the control unit, and the control unit controls the wireless charging coil to receive electric energy and store the electric energy into the energy storage unit;
The power management unit transmits detection signals outwards through the wireless charging coil, and returns charging output signals to the control unit after detecting external wireless charging input equipment, and the control unit controls the wireless charging coil to release electric energy in the energy storage unit;
The power management unit is used for controlling the transmission direction of electric energy, and the wireless charging coil stores the received electric energy into the energy storage unit through the power management unit, or the power management unit releases the electric energy in the energy storage unit through the wireless charging coil.
Among them, the preferred scheme is: the wireless charging transmitting device further comprises an electric energy conversion unit which is respectively connected with the wireless charging coil and the power management unit, wherein the electric energy conversion unit is used for converting direct current of the energy storage unit into high-frequency alternating current required by wireless transmission or converting received high-frequency alternating current into direct current.
Among them, the preferred scheme is: the electric energy conversion unit is a bridge circuit, and the bridge circuit comprises four power switches which are all connected with and controlled by the control unit.
Among them, the preferred scheme is: the control unit comprises a power adjusting module, wherein the power adjusting module transmits an input power adjusting signal to external wireless charging output equipment through a wireless charging coil, or the power adjusting module receives an output power adjusting signal of the external wireless charging input equipment through the wireless charging coil and controls the electric energy conversion unit to adjust the power of the output high-frequency alternating current.
Among them, the preferred scheme is: the power management unit comprises a current detection circuit which is respectively connected with the control unit and the wireless charging coil, and the current detection circuit returns a charging output signal to the control unit according to the current value fed back by the wireless charging coil.
Among them, the preferred scheme is: the wireless charging coil transmits an output power adjusting signal to the power adjusting module through the envelope filtering circuit, and transmits a charging input signal to the control unit through the envelope filtering circuit, wherein the charging input signal is a voltage peak value of an electric connection point between a magnetic coil and a resonance capacitor of the wireless charging coil.
Among them, the preferred scheme is: the control unit comprises a logic and driving sub-module connected with the bridge circuit, the comparator circuit outputs digital signals generated after voltage comparison of two ends of the wireless charging coil to the control unit, and the logic and driving sub-module controls a power switch of the bridge circuit to be turned on and off according to the digital signals so as to realize synchronous rectification.
The technical scheme adopted for solving the technical problems is as follows: the intelligent charging input method of the wireless charging transmitting device comprises the following steps:
Switching to a receiving mode, entering a monitoring state through a wireless charging coil, and feeding back a monitoring signal;
When the voltage value of the monitoring signal is transformed and is larger than a first preset voltage value, the wireless charging transmitting device enters a wireless electric energy input mode;
and setting a second preset voltage value when the wireless charging transmitting device does not enter the wireless electric energy input mode within the preset time, and re-entering the monitoring state when the monitoring signal is smaller than the second preset voltage value.
The technical scheme adopted for solving the technical problems is as follows: the intelligent charging output method of the wireless charging transmitting device comprises the following steps:
In the process of monitoring the state, the wireless charging transmitting device is switched to a transmitting mode at intervals, transmits a detection signal outwards and feeds back a detection feedback signal, and is in a large-resistance unidirectional energy transmission mode;
The current values of the detection feedback signals at the current time and the later time are converted and are larger than the first preset current value or smaller than the second preset current value, and meanwhile, after the detection signals are stopped being transmitted, the current value of the detection feedback signals is smaller than the third preset current value, and the wireless charging transmitting device enters a wireless electric energy output mode.
The preferred scheme is that after the detection work is completed twice before and after the detection work is completed and before the wireless charging transmitting device enters a wireless electric energy output mode, the method further comprises the following steps:
Switching to the transmitting mode again, and transmitting the detection signals outwards, wherein the interval time of the second transmission detection signal and the third transmission detection signal is different from the interval time of the previous transmission detection signal;
When the current value of the detection feedback signal fed back for the third time is transformed and is larger than the first preset current value or smaller than the second preset current value, and meanwhile, after the detection signal stops being transmitted, the current value of the detection feedback signal is smaller than the third preset current value, and the wireless charging transmitting device enters a wireless electric energy output mode.
Compared with the prior art, the wireless charging transmitting device and the intelligent charging input and output method thereof have the advantages that the wireless charging transmitting device is switched by monitoring signals on the shared wireless charging receiving/transmitting coil on the basis of the existing shared circuit mode, so that the danger caused by the fact that the other wireless charging equipment and the current wireless charging transmitting device are in a transmitting state at the same time is avoided; meanwhile, the technical effects of the wireless charging equipment of the other party are found in real time through two detection technologies such as 'randomly sending detection signals' and 'actively monitoring the remaining time', and the corresponding working modes are automatically entered under different detection means, so that the risk problem that the wireless charging equipment of both parties are in a wireless charging emission mode and danger occurs is solved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a circuit block diagram of a wireless charging transmitting device of the present invention;
FIG. 2 is a circuit block diagram of a further extension of FIG. 1;
FIG. 3 is a circuit block diagram of a power conditioning module of the present invention;
FIG. 4 is a circuit block diagram of the current detection circuit of the present invention;
FIG. 5 is a schematic circuit diagram of FIG. 4;
FIG. 6 is a circuit block diagram of an envelope filter circuit of the present invention;
FIG. 7 is a circuit block diagram of a comparator circuit and logic and drive sub-module of the present invention;
FIG. 8 is a schematic circuit diagram of the combination of FIGS. 6 and 7;
FIG. 9 is a schematic circuit diagram of a logic and drive sub-module of the present invention;
FIG. 10 is a flow chart of the smart charge input method of the present invention;
FIG. 11 is a flow chart of the smart charge output method of the present invention;
Fig. 12 is a flowchart of the third outward transmission of the probe signal of fig. 11.
Detailed Description
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a preferred embodiment of a wireless charging transmitting device.
A wireless charging transmitting device comprises a control unit 20, a wireless charging coil 10, a power management unit 30 and an energy storage unit 40, wherein the control unit 20 is respectively connected with the wireless charging coil 10 and the power management unit 30, and the power management unit 30 is respectively connected with the wireless charging coil 10 and the energy storage unit 40.
Specifically, the wireless charging coil 10 senses an external wireless charging output device and returns a charging input signal to the control unit 20, and the control unit 20 controls the wireless charging coil 10 to receive electric energy and store the electric energy in the energy storage unit 40. At this time, the wireless charging coil 10 processes the receiving mode, and after sensing an external wireless charging output device, the wireless charging transmitting apparatus enters the intra-charging mode.
And the power management unit 30 transmits a detection signal to the outside through the wireless charging coil 10, returns a charging output signal to the control unit 20 after detecting an external wireless charging input device, and the control unit 20 controls the wireless charging coil 10 to discharge the electric energy in the energy storage unit 40. At this time, the wireless charging coil 10 processes the transmission mode, and after sensing an external wireless charging input device, the wireless charging transmission device enters the external charging mode.
Further, the power management unit 30 is used for controlling 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, i.e., the intra-pair charging mode; or the power management unit 30 releases the electric power in the energy storage unit 40 through the wireless charging coil 10, i.e., an external charging mode. Wherein the energy storage unit 40 is used for storing electrical energy.
In this embodiment, on the basis of the existing shared circuit mode, a manner of monitoring signals on a shared wireless charging receiving/transmitting coil is adopted to switch, so that the situation that the other wireless charging equipment and the current wireless charging transmitting device are in a transmitting state at the same time and then cause danger is avoided.
Wherein the external wireless charging output device is a device that emits electromagnetic waves, and is received by the wireless charging coil 10 and converted into electric energy; the external wireless charging input device is a device that receives electromagnetic waves, and the wireless charging coil 10 emits electromagnetic waves and is received by the external wireless charging input device and converted into electric energy.
As shown in fig. 2, the present invention provides a preferred embodiment of a wireless charging transmitting device.
The wireless charging transmitting apparatus further includes an electric power conversion unit 50, the electric power conversion unit 50 being connected to the wireless charging coil 10 and the power management unit 30, respectively, the electric power conversion unit 50 being configured to convert the direct current of the energy storage unit 40 into the high frequency alternating current required for wireless transmission, or the electric power conversion unit 50 being configured to convert the received high frequency alternating current into the direct current.
In the in-charge mode, the external wireless charging output device generates an electromagnetic field and is received by the wireless charging coil 10, the wireless charging coil 10 converts the received electromagnetic field into a high-frequency alternating current, the electric energy conversion unit 50 is used for converting the received high-frequency alternating current into a direct current and storing the direct current into the energy storage unit 40, that is, the external wireless charging output device charges to charge the wireless charging transmitting device.
In the external charging mode, the electric energy conversion unit 50 is configured to convert the direct current of the energy storage unit 40 into the 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 sends the electromagnetic field to the outside, and receives the electromagnetic field from the external wireless charging input device, i.e., the wireless charging transmitting device charges the external wireless charging input device.
Further, the power conversion unit 50 is a bridge circuit, and the bridge circuit includes four power switches, which are connected to and controlled by the control unit 20.
As shown in fig. 3, the present invention provides a preferred embodiment of a power conditioning module.
The control unit 20 includes a power adjustment module 21, which transmits an input power adjustment signal to an external wireless charging output device through the wireless charging coil 10, or which receives an output power adjustment signal of the external wireless charging input device through the wireless charging coil 10, and controls the power conversion unit 50 to adjust power outputting high-frequency alternating current.
In the internal charging mode, the external wireless charging output device charges the wireless charging transmitting device, and meanwhile, the power adjusting module 21 transmits an input power adjusting signal to the external wireless charging output device through the wireless charging coil 10, and the external wireless charging output device adjusts the power of the high-frequency alternating current received by the wireless charging coil 10 according to the input power adjusting signal.
In the external charging mode, the wireless charging transmitting device charges the external wireless charging input device, and the power adjusting module 21 receives an output power adjusting signal of the external wireless charging input device through the wireless charging coil 10, and the power adjusting module 21 controls the electric energy converting unit 50 to adjust the power outputting the high-frequency alternating current according to the output power adjusting signal.
As shown in fig. 4 and 5, the present invention provides a preferred embodiment of a current detection circuit.
The power management unit 30 includes a current detection circuit 31, and the current detection circuit 31 is respectively connected to the control unit 20 and the wireless charging coil 10, and the current detection circuit 31 returns a charging output signal to the control unit 20 according to a current value fed back by the wireless charging coil 10.
Specifically, the power management unit 30 transmits a detection signal to the outside through the wireless charging coil 10 and feeds back a corresponding detection feedback signal, the current detection circuit 31 receives the detection feedback signal and returns a charging output signal to the control unit 20 according to the current value of the received detection feedback signal, and the control unit 20 controls the wireless charging coil 10 to release the electric energy in the energy storage unit 40 according to the returned charging output signal.
Referring to fig. 5, the current detection circuit 31 detects a current using a series small resistor 311, and filters and amplifies the detected signal through an amplifier 312, and a reference power supply 313 is also added for the design of dc voltage boost in order to realize the detection of a bidirectional current. When no current exists, the voltage value of the feedback return charging output signal is a non-zero voltage tV; in the transmitting mode, the voltage value of the return charging output signal is greater than the voltage value of tV; in the receiving mode, the voltage value of the return charge output signal is a voltage value less than tV.
Referring to fig. 5, the power management unit 30 further includes a diode 32 and a power switch 33, and the power switch 33 is controlled by the control unit 20, and the power switch 33 is generally implemented with power Pmosfet and is designed integrally with the diode 32.
Specifically, when the level of the control unit 20 input to the power switch 33 is high, the power switch 33 is turned off, only the energy of the energy storage unit 40 is allowed to supply low power to the electric energy conversion unit 50 through the diode 32, and the electric energy conversion unit 50 is a bridge circuit, so that the occurrence of reverse irrigation can be avoided;
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 to charge high power to the energy storage unit 40 through the power switch 33.
As shown in fig. 6, 7, 8 and 9, the present invention provides a preferred embodiment of a wireless charging transmitting device.
An envelope filter circuit 60 is further included between the control unit 20 and the wireless charging coil 10, 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 transmits a charging input signal to the control unit 20 through the envelope filter circuit 60, wherein the charging input signal is a voltage peak value of an electrical connection point between the magnetic coil and the resonant capacitor of the wireless charging coil 10.
The control unit 20 and the wireless charging coil 10 further comprise a comparator circuit 70, the control unit 20 comprises a logic and driving sub-module 22 connected with the bridge circuit, the comparator circuit 70 outputs a digital signal generated by comparing voltages at two ends of the wireless charging coil 10 to the control unit 20, and the logic and driving sub-module 22 controls a power switch of the bridge circuit to be turned on and off according to the digital signal so as to realize synchronous rectification.
Referring to fig. 8, a bridge circuit is included, which is implemented by 4 power switches, typically power switching transistors, controlled by the control unit 20, and a wireless charging coil 10 consisting of a magnetic coil and a resonant capacitor.
Specifically, the wireless charging coil 10 is further connected to a set of envelope filter circuits 60, the wireless charging coil 10 transmits the output power adjustment signal to the power adjustment module 21 through the envelope filter circuits 60, and the wireless charging coil 10 transmits the charging input signal to the control unit 20 through the envelope filter circuits 60.
And, a comparator circuit 70 is further included between the control unit 20 and the wireless charging coil 10, and the comparator circuit 70 outputs a digital signal generated by comparing voltages at both ends of the wireless charging coil 10 to the control unit 20.
And, a switch type load circuit 80 is further included between the control unit 20 and the wireless charging coil 10, and the switch type load circuit 80 is used for modulating the input power adjusting signal to the wireless charging coil 10.
Referring to fig. 9, the control unit 20 includes a logic and drive sub-module 22 connected to a bridge circuit, the logic and drive sub-module 22 being part of the control circuit and being enabled only in the intra-pair charging mode and disabled in the external charging mode.
When the level of the digital signal changes, the logic and driving sub-module 22 also immediately generates corresponding change to control the power switch in the bridge circuit to be turned on or off so as to realize synchronous rectification. Wherein a low-level on-switch is input to the control terminal 81 of the switch-type load circuit 80, and an input power adjustment signal is modulated onto the wireless charging coil 10.
As shown in fig. 10, the present invention provides a preferred embodiment of an intelligent charging input method.
An intelligent charging input method of a wireless charging transmitting device comprises the following steps:
s11, switching to a receiving mode, entering a monitoring state through the wireless charging coil 10, and feeding back a monitoring signal;
S12, when the voltage value of the monitoring signal is transformed and is larger than a first preset voltage value, the wireless charging transmitting device enters a wireless electric energy input mode (namely an internal charging mode);
and S13, setting a second preset voltage value when the wireless charging transmitting device does not enter the wireless electric energy input mode within the preset time, and re-entering the monitoring state when the monitoring signal is smaller than the second preset voltage value.
Specifically, the monitoring signal is a VL signal, and a first preset voltage value aV is set, and if the voltage value of the fed back VL signal is greater than or equal to the first preset voltage value aV, it indicates that another electromagnetic field emission device appears in the induction range of the wireless charging coil 10, and may be a wireless charging output device; at this time, the wireless charging transmitting apparatus enters an intra-charging mode and attempts to receive wireless power of an external wireless charging output device.
Setting a preset time Q seconds and a second preset voltage value bV, and if the charging mode is not entered within the preset time Q seconds, indicating that the electromagnetic field emission device is not present in the induction range of the wireless charging coil 10; at this time, the voltage value of the VL signal is set to be greater than or equal to the second preset voltage value bV until the VL signal is less than the second preset voltage value bV, that is, the non-electromagnetic field emission device occurring in the induction range of the wireless charging coil 10 leaves the induction range, and the wireless charging emission device reenters the listening state.
If the in-pair charging mode is entered within the preset time Q seconds, that is, the wireless charging transmitting device can receive the wireless power of the external wireless charging output device, it is indicated that the electromagnetic field transmitting device appears in the induction range of the wireless charging coil 10, and the input power adjusting signal is continuously transmitted to the other electromagnetic field transmitting device; until the other electromagnetic field emission device is moved out of the sensing range of the wireless charging coil 10 or the electric quantity of the energy storage unit 40 is stored fully, the wireless charging emission device enters the monitoring state again.
As shown in fig. 11 and 12, the present invention provides a preferred embodiment of an intelligent charging output method.
The intelligent charging output method of the wireless charging transmitting device comprises the following steps:
S21, in the process of a monitoring state, switching to a transmitting mode at intervals, transmitting a detection signal outwards, feeding back a detection feedback signal, and simultaneously enabling the wireless charging transmitting device to be in a large-resistance unidirectional energy transmission mode;
S22, the current values of the detection feedback signals of the current and the later times are converted and are larger than a first preset current value or smaller than a second preset current value, and meanwhile, after the detection signals are stopped being transmitted, the current value of the detection feedback signals is smaller than a third preset current value;
S25, the wireless charging transmitting device enters a wireless power output mode (namely an external charging mode).
Specifically, in the process of continuously monitoring the VL signal, setting an interval time t seconds, and setting the detection feedback signal as the IL signal; intermittently switching to a transmitting mode, wherein the interval time is t seconds, and transmitting a detection signal outwards to feed back an IL signal; the power management unit 30 is in a large-resistance unidirectional energy transmission mode in the transmitting mode, and the energy storage unit 40 supplies low-power to the bridge circuit to avoid the occurrence of wireless charging output equipment of the right other party, and also just outputs wireless charging energy or signals, so that the energy storage unit 40 is damaged by reverse charging of electric energy.
Setting a first preset current value yA, a second preset current value xA and a third preset current value zA, if the current value of the IL signal is larger than the first preset current value yA or smaller than the second preset current value xA when the detection signal is sent out twice before and after, and the current value of the IL signal is smaller than the third preset current value zA after stopping sending out the detection signal, it indicates that the other magnetic conductivity or electrical conductivity device appears in the induction range of the wireless charging coil 10, and the wireless charging input device is possible.
Further, after the detection operation is completed twice, before the wireless charging transmitting device enters the wireless power output mode (step S25), the method further comprises the steps of:
s23, switching to a transmitting mode again, and transmitting the detection signals outwards, wherein the interval time of the second transmission detection signal and the third transmission detection signal is different from the interval time of the previous two transmission detection signals;
S24, when the current value of the detection feedback signal fed back for the third time is transformed and is larger than the first preset current value or smaller than the second preset current value, and simultaneously, after the detection signal stops being transmitted, the current value of the detection feedback signal is smaller than the third preset current value;
S25, the wireless charging transmitting device enters a wireless power output mode.
Specifically, the interval k seconds is set, in order to ensure that the reliability of the wireless charging input device is the other magnetic permeability or conductivity device in the induction range of the wireless charging coil 10, the wireless charging transmitting device will switch to the transmitting mode again after the interval k seconds, and transmit the detection signal outwards;
If the current values of the IL signals of the detection feedback signals fed back for the third time are all greater than the first preset current value yA or less than the second preset current value xA, and the current values of the IL signals after stopping sending the detection signals are all less than the third preset current value zA, it is indicated that the other magnetic permeability or conductivity device appears in the induction range of the wireless charging coil 10, and the wireless charging input device is the wireless charging input device.
Wherein k seconds are not equal to t seconds, for avoiding that the other party is a wireless charging output device and also just emits output wireless charging energy or signals at intervals of t seconds.
Further, the power management unit 30 is set to a low-resistance energy transmission mode, the energy storage unit 40 supplies high power to the bridge circuit, and starts to output wireless charging energy to the other wireless charging input device, and controls the bridge circuit to perform power adjustment according to the output power adjustment signal provided by the other wireless charging input device until the other electromagnetic field transmitting device is moved out of the sensing range of the wireless charging coil 10, or the output power adjustment signal is not received, and the wireless charging transmitting device reenters the monitoring state.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the invention, but rather is intended to cover all modifications and variations within the scope of the present invention as defined in the appended claims.
Claims (5)
1. The intelligent charging input method and the intelligent charging output method of the wireless charging transmitting device are characterized in that the wireless charging transmitting device comprises a control unit, a wireless charging coil, a power management unit and an energy storage unit, wherein the control unit is respectively connected with the wireless charging coil and the power management unit, and the power management unit is respectively connected with the wireless charging coil and the energy storage unit; the wireless charging coil senses external wireless charging output equipment and returns a charging input signal to the control unit, and the control unit controls the wireless charging coil to receive electric energy and store the electric energy into the energy storage unit; the power management unit transmits detection signals outwards through the wireless charging coil, and returns charging output signals to the control unit after detecting external wireless charging input equipment, and the control unit controls the wireless charging coil to release electric energy in the energy storage unit; the wireless charging coil is used for storing the received electric energy into the energy storage unit through the power management unit, or the power management unit is used for releasing the electric energy in the energy storage unit through the wireless charging coil; the wireless charging transmitting device also comprises an electric energy conversion unit which is respectively connected with the wireless charging coil and the power management unit, and is used for converting the direct current of the energy storage unit into high-frequency alternating current required by wireless transmission or converting the received high-frequency alternating current into direct current; the control unit comprises a logic and driving sub-module connected with the bridge circuit, the comparator circuit outputs a digital signal generated after voltage comparison of two ends of the wireless charging coil to the control unit, and the logic and driving sub-module controls a power switch of the bridge circuit to be turned on and off according to the digital signal so as to realize synchronous rectification;
The intelligent charging input method comprises the following steps: switching to a receiving mode, entering a monitoring state through a wireless charging coil, and feeding back a monitoring signal; when the voltage value of the monitoring signal is transformed and is larger than a first preset voltage value, the wireless charging transmitting device enters a wireless electric energy input mode; setting a second preset voltage value when the wireless charging transmitting device does not enter the wireless electric energy input mode within the preset time, and re-entering a monitoring state when the monitoring signal is smaller than the second preset voltage value;
The intelligent charging output method comprises the following steps: in the process of monitoring the state, the wireless charging transmitting device is switched to a transmitting mode at intervals, transmits a detection signal outwards and feeds back a detection feedback signal, and is in a large-resistance unidirectional energy transmission mode; the current values of the detection feedback signals at the current and the later times are converted and are larger than a first preset current value or smaller than a second preset current value, and meanwhile, after the detection signals are stopped being transmitted, the current value of the detection feedback signals is smaller than a third preset current value, and the wireless charging transmitting device enters a wireless electric energy output mode; after the detection work is completed for two times, and before the wireless charging transmitting device enters a wireless electric energy output mode, the method further comprises the following steps: switching to the transmitting mode again, and transmitting the detection signals outwards, wherein the interval time of the second transmission detection signal and the third transmission detection signal is different from the interval time of the previous two transmission detection signals; when the current value of the detection feedback signal fed back for the third time is transformed and is larger than the first preset current value or smaller than the second preset current value, and meanwhile, after the detection signal stops being transmitted, the current value of the detection feedback signal is smaller than the third preset current value, and the wireless charging transmitting device enters a wireless electric energy output mode.
2. The method according to claim 1, characterized in that: the electric energy conversion unit is a bridge circuit, and the bridge circuit comprises four power switches which are all connected with and controlled by the control unit.
3. The method according to claim 1, characterized in that: the control unit comprises a power adjusting module, wherein the power adjusting module transmits an input power adjusting signal to external wireless charging output equipment through a wireless charging coil, or the power adjusting module receives an output power adjusting signal of the external wireless charging input equipment through the wireless charging coil and controls the electric energy conversion unit to adjust the power of the output high-frequency alternating current.
4. The method according to claim 1, characterized in that: the power management unit comprises a current detection circuit which is respectively connected with the control unit and the wireless charging coil, and the current detection circuit returns a charging output signal to the control unit according to the current value fed back by the wireless charging coil.
5. A method according to claim 3, characterized in that: the wireless charging coil transmits an output power adjusting signal to the power adjusting module through the envelope filtering circuit, and transmits a charging input signal to the control unit through the envelope filtering circuit, wherein the charging input signal is a voltage peak value of an electric connection point between a magnetic coil and a resonance capacitor of the wireless charging coil.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710113966.XA CN106849387B (en) | 2017-02-28 | 2017-02-28 | Wireless charging transmitting device and intelligent charging input and output method thereof |
| PCT/CN2018/072592 WO2018157672A1 (en) | 2017-02-28 | 2018-01-15 | Wireless charging emitter and intelligent charging input and output methods thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710113966.XA CN106849387B (en) | 2017-02-28 | 2017-02-28 | Wireless charging transmitting device and intelligent charging input and output method thereof |
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| CN106849387A CN106849387A (en) | 2017-06-13 |
| CN106849387B true CN106849387B (en) | 2024-07-19 |
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| WO (1) | WO2018157672A1 (en) |
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| CN106849387B (en) * | 2017-02-28 | 2024-07-19 | 深圳市禾家欢科技有限公司 | Wireless charging transmitting device and intelligent charging input and output method thereof |
| CN109802582B (en) * | 2017-11-17 | 2021-03-05 | 无锡华润矽科微电子有限公司 | Synchronous rectification circuit of wireless charging receiving end |
| US11929626B2 (en) | 2018-09-29 | 2024-03-12 | Huawei Technologies Co., Ltd. | Wireless charging method and electronic device |
| CN109995121B (en) * | 2019-05-05 | 2023-11-28 | 中国科学技术大学 | Power optimized many-to-many wireless charging device and control method |
| CN110690766A (en) * | 2019-11-11 | 2020-01-14 | 创新巴巴(深圳)信息有限公司 | System and device for intercepting partial magnetic field switching current in wireless charging process |
| CN111169298A (en) * | 2020-01-31 | 2020-05-19 | 武汉大学 | Tubular transmitting unmanned aerial vehicle wireless power supply system |
| CN112072800B (en) * | 2020-07-30 | 2023-02-03 | 北京临近空间飞行器系统工程研究所 | Electromagnetic coupling-based aircraft wireless charging system and method |
| CN111934441A (en) * | 2020-07-30 | 2020-11-13 | 深圳市中孚能电气设备有限公司 | Lighting equipment, bidirectional wireless charging device and control method thereof |
| TWI741944B (en) * | 2021-02-05 | 2021-10-01 | 美律實業股份有限公司 | Wireless charging device and wireless charging switching method |
| CN113036889A (en) * | 2021-04-28 | 2021-06-25 | 华南理工大学 | Mobile energy storage device with wireless charging and discharging functions |
| CN113708512A (en) * | 2021-09-17 | 2021-11-26 | 维沃移动通信有限公司 | Electronic device and control method |
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| WO2018157672A1 (en) | 2018-09-07 |
| CN106849387A (en) | 2017-06-13 |
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