CN113541269A - Wireless charging method for mobile phone - Google Patents
Wireless charging method for mobile phone Download PDFInfo
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- CN113541269A CN113541269A CN202110930806.0A CN202110930806A CN113541269A CN 113541269 A CN113541269 A CN 113541269A CN 202110930806 A CN202110930806 A CN 202110930806A CN 113541269 A CN113541269 A CN 113541269A
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- 238000005299 abrasion Methods 0.000 description 1
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
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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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a wireless charging method for a mobile phone, which comprises the following specific steps: (1) a mobile terminal is close to a wireless charger, and the wireless charger and the mobile terminal simultaneously acquire a time synchronization signal; (2) the second microprocessor receives a charging signal sent by a mobile terminal and starts to charge the mobile terminal; (3) when the other mobile terminal is close to the previous mobile terminal, the two mobile terminals start timing by acquiring a time synchronization signal; (4) the microprocessor of the mobile terminal with high electric quantity percentage receives the reverse charging signal and controls the first radio energy of the mobile terminal to transmit electric quantity to the first radio energy receiving circuit of the mobile terminal with low electric quantity percentage to output electric energy for reverse charging; (5) and the two mobile terminals repeatedly acquire and compare the electric quantity percentages, and when the difference between the electric quantity percentages is smaller than a set value, the reverse charging is stopped.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging method for a mobile phone.
Background
At present, electronic equipment such as mobile phones, tablet computers, notebook computers, smart watches, electric toothbrushes and the like have become one of indispensable articles in work and life of people, and the requirements of people on the functions and the realization convenience of the electronic equipment are higher and higher. For example, the charging process of the electronic equipment can adopt a wireless charging technology, the limitation of a power line is not considered, and the abrasion of the device caused by frequent plugging and unplugging of the power line is reduced.
The electronic device supporting wireless charging as above can receive the electric energy transmitted by the external device except for being in a wireless forward charging mode; the wireless reverse charging mode of the electronic equipment can be started manually after the electronic equipment is unlocked by a user, so that the electronic equipment can be used as charging equipment to output electric energy, and the process is complicated.
At present, mobile terminals such as smart phones can be placed into a wireless charger for wireless charging, two mobile terminals are placed together, one mobile terminal can be manually started to be reversely charged, and the other mobile terminal is wirelessly charged. Manual operation is relatively troublesome, and the reverse charging function is started in every two mobile terminals, which may damage wireless charging circuits in the mobile terminals.
A charging control method, a charging control device, and an electronic device are disclosed in chinese patent application No. 202011587266.2, published as 2021.04.30, where a first electronic device may obtain first state information that can indicate whether the first electronic device can be used as a charging device, and when it is detected that the first state information satisfies a wireless charging condition, the first electronic device will be automatically controlled to enter a wireless reverse charging mode, where the first electronic device is used as a charging device to transmit electric energy to a second electronic device that is located in a wireless charging radiation range of the first electronic device and is in a wireless forward charging mode, so as to satisfy a charging requirement of the second electronic device. Therefore, according to the method and the device, the wireless reverse charging mode can be selected without manually entering a setting interface of the first electronic device, the automatic switching control of the wireless charging mode of the first electronic device can be realized, the operation is simple and convenient, and the flexibility of wireless charging control is improved.
However, according to the charging control method of the present invention, the first electronic device is controlled to stop outputting the electric energy only after the charged device is fully charged, so that the problem of insufficient electric energy of the first electronic device is easily caused during charging, and the first electronic device may be shut down due to the power consumption if not noticed.
Disclosure of Invention
The invention provides a wireless charging method for a mobile phone.
In order to achieve the purpose, the technical scheme of the invention is as follows: a wireless charging method of a mobile phone is realized by more than one mobile terminal and a wireless charger, wherein the mobile terminal comprises a first coil, a first wireless energy receiving circuit, a first wireless energy transmitting circuit, a charging circuit, a battery, a voltage converter, a switch K1, a switch K3, a switch K4, an amplifying circuit, a weak transmitting circuit and a microprocessor, the first coil is connected with one end of the switch K3, the other end of the switch K3 is connected with the first wireless energy receiving circuit, the first wireless energy receiving circuit is connected with the charging circuit through a switch K4, the charging circuit is connected with the battery, and the battery is also connected with the voltage converter; the first coil is also connected with a first radio energy transmitting circuit through a third end of a switch K3, the first radio energy transmitting circuit is connected with one end of a switch K1, the other end of the switch K1 is connected with a voltage converter, the first radio energy transmitting circuit is also connected with a weak transmitting circuit, and the weak transmitting circuit is connected with a microprocessor through an amplifying circuit;
the wireless charger comprises a second coil, a second wireless power transmitting circuit, a switch K5, a power supply Vcc, a second weak transmitting circuit, a second amplifying circuit and a second microprocessor, wherein the power output end of the second wireless power transmitting circuit is connected with the second weak transmitting circuit, the second weak transmitting circuit is connected with the second microprocessor through the second amplifying circuit, the power input end of the second wireless power transmitting circuit is also connected with the power supply Vcc through a switch K5, and the power charging end of the second wireless power transmitting circuit is connected with the second coil;
the method comprises the following specific steps:
(1) a mobile terminal is close to a wireless charger, and the wireless charger and the mobile terminal simultaneously acquire a time synchronization signal;
(2) a first wireless electric energy receiving circuit of a mobile terminal outputs a charging signal to a second microprocessor of a wireless charger, the second microprocessor receives the charging signal and starts to charge the mobile terminal, and if the charging signal disappears, the charging is stopped;
(3) when the other mobile terminal is close to the previous mobile terminal, the two mobile terminals start timing by acquiring a time synchronization signal;
(301) comparing the electric quantity percentages of the two mobile terminals, and if the difference between the electric quantity percentages of the two mobile terminals is smaller than a preset set value, restarting timing and continuously comparing the electric quantity percentages of the two mobile terminals;
(302) if the difference between the electric quantity percentages of the two mobile terminals is larger than a preset set value, timing is stopped, after timing is stopped, a first coil of the mobile terminal with low electric quantity percentage obtains a charging signal and outputs the charging signal to a microprocessor of the mobile terminal through a first wireless power receiving circuit, and the microprocessor of the mobile terminal stops timing and simultaneously sends a reverse charging signal to the microprocessor of the mobile terminal with high electric quantity percentage;
(4) the mobile terminal with high electric quantity percentage receives the reverse charging signal and controls the first wireless electric energy transmitting circuit of the mobile terminal to output electric energy to the first wireless electric energy receiving circuit of the mobile terminal with low electric quantity percentage for reverse charging;
(5) and the two mobile terminals repeatedly acquire and compare the electric quantity percentages, and when the difference between the electric quantity percentages is smaller than a preset set value, the reverse charging is stopped.
Above-mentioned structure, when charging a mobile terminal, press close to wireless charger with a mobile terminal, wireless charger can carry out the forward to this mobile terminal and charge, when needs charge to the mobile terminal that another electric quantity percentage is lower, press close to a mobile terminal with another mobile terminal, two mobile terminal's microprocessor can contrast two mobile terminal's electric quantity percentage and control a mobile terminal that electric quantity percentage is high and carry out reverse charging to the mobile terminal that electric quantity percentage is low, two mobile terminal's microprocessor constantly acquires and contrasts two mobile terminal's electric quantity percentage and contrast at the charging process, when two mobile terminal's electric quantity percentage is not big, stop charging, prevent that there is a mobile terminal because of the electric quantity hangs down and shuts down.
Further, the specific method for acquiring the time synchronization signal is as follows: when a mobile terminal approaches the wireless charger, a first coil of the mobile terminal and a second coil of the wireless charger mutually induct to receive a signal, a K31 end and a K33 end of a switch K3 of the mobile terminal are communicated, the first coil is connected with a first wireless power transmitting circuit, the signal is transmitted to a microprocessor through the first wireless power transmitting circuit, the microprocessor receives the signal and controls a timer in the microprocessor to start timing, the second coil also receives the signal at the same time, the switch K6 is conducted, a second wireless power transmitting circuit is communicated with a second amplifying circuit, the second coil amplifies the signal through the second amplifying circuit and transmits the signal to the second microprocessor, the second microprocessor receives the signal and controls the timer to start timing, the wireless charger and the mobile terminal start timing, when the timing of the wireless charger and the timing of the mobile terminal are synchronous, the terminal K31 and the terminal K32 of a switch K3 of the mobile terminal are connected, the first coil is connected with the first wireless power receiving circuit, the first coil sends a charging signal to the microprocessor through the first wireless power receiving circuit, the microprocessor obtains the charging signal and stops timing, meanwhile, the first wireless power receiving circuit sends the charging signal to the second coil, and meanwhile, the switch K4 is conducted.
Further, the weak transmitting circuit includes a resistor R0, a resistor R1 and a switch K2, one end of the resistor R0 is connected to the first radio energy transmitting circuit, the other end of the resistor R0 is connected in series with the resistor R1, the other end of the resistor R1 is grounded, the switch K2 is connected in parallel with the resistor R0, one end of the resistor R0 connected to the resistor R1 is further connected to the amplifying circuit, when the two mobile terminals approach each other, the current flowing through the first radio energy transmitting circuit from the first coil increases instantaneously, and under the action of the weak transmitting circuit, when the first radio energy transmitting circuit operates, the voltage drop across the resistor R0 increases, so that the voltage output by the first radio energy transmitting circuit decreases, thereby protecting the first radio energy transmitting circuit from being easily damaged.
Further, the step (301) specifically includes: the specific step of comparing the electric quantity percentages of the two mobile terminals is as follows: the method comprises the steps that the microprocessor of the two mobile terminals obtains the power percentage, the rectangular wave duty ratio is determined according to the power percentage, the rectangular wave duty ratio is the working time t1 of the first coil connected with the first radio energy receiving circuit and the working time t2 of the weak transmitting circuit, the rectangular wave duty ratio is determined through the working time t1 and the working time t2, and the power percentage difference value is determined by comparing the rectangular wave duty ratios of the two mobile terminals.
Further, the weak transmitting circuit of second includes resistance R2, resistance R3 and switch K6, resistance R2's one end is connected with the second wireless power transmitting circuit, resistance R2's the other end and resistance R3 series arrangement, resistance R3's the other end ground connection, switch K6 and resistance R2 parallel arrangement, still with second amplifier circuit in the one end that resistance R2 and resistance R3 are connected, when a mobile terminal is close to wireless charger, the current that the second coil flows the second wireless power transmitting circuit can increase in the twinkling of an eye, under weak transmitting circuit's effect, when the work of second wireless power transmitting circuit, the pressure drop grow at resistance R2 both ends for the voltage that the second wireless power transmitting circuit is exported reduces, thereby the protection second wireless power transmitting circuit is difficult to damage and connects.
Further, the step (302) specifically includes: if the electric quantity percentage difference of the two mobile terminals is larger than a preset set value, a first coil of the mobile terminal with the high electric quantity percentage is communicated with a first radio energy transmitting circuit; and the first coil of the mobile terminal with low electric quantity percentage is communicated with the first wireless electric energy receiving circuit, and the first wireless electric energy transmitting circuit of the mobile terminal with high electric quantity percentage transmits electric energy to the first wireless electric energy receiving circuit of the mobile terminal with low electric quantity percentage for charging.
Further, the step (4) specifically comprises: when charging is carried out, the first coil of the mobile terminal with low electric quantity percentage is communicated with the first wireless electric energy receiving circuit, the first wireless electric energy receiving circuit sends a charging signal to the microprocessor, when the microprocessor receives the charging signal, the charging can be carried out, and if the charging signal is disconnected, the step (1) is repeated.
Further, when charging is started, a first coil of a mobile terminal with a high power percentage is communicated with the first wireless power transmitting circuit, the output voltage of the battery outputs power supply voltage through the voltage converter, when the switch K1 is switched on, the battery is communicated with the first wireless power transmitting circuit through the voltage converter, and the mobile terminal with the high power percentage outputs electric energy to the mobile terminal with the low power percentage through the first wireless power transmitting circuit.
Furthermore, a first coil of a mobile terminal with low electric quantity percentage is connected with the first wireless electric energy receiving circuit, the first wireless electric energy receiving circuit is connected with the charging circuit, and the mobile terminal with low electric quantity percentage receives electric energy output by one end with high electric quantity percentage through the first wireless electric energy receiving circuit.
Drawings
Fig. 1 is a schematic circuit structure diagram of a mobile terminal according to the present invention.
Fig. 2 is a schematic circuit diagram of the wireless charger of the present invention.
Fig. 3 is a flowchart of a wireless charging method according to the present invention.
Fig. 4 is a simple schematic of the duty cycle of a square wave.
Fig. 5 is a schematic diagram illustrating that the duty ratio of the rectangular wave of two mobile terminals is greater than a set value according to the present invention.
Fig. 6 is a schematic diagram illustrating that the rectangular wave duty ratio of two mobile terminals is smaller than a set value according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 6, the wireless charging method is implemented by more than one mobile terminal 1 and a wireless charger 2, the mobile terminal 1 includes a first coil 11, a first radio energy receiving circuit 12, a first radio energy transmitting circuit 13, a charging circuit 14, a battery 15, a voltage converter 16, a switch K1, a switch K3, a switch K4, an amplifying circuit 17 (in this embodiment, a signal transmitted to a microprocessor by the first radio energy transmitting circuit is amplified by the amplifying circuit, a specific amplifying method is the prior art and will not be described again), a weak transmitting circuit 3 and a microprocessor 4, the first coil 11 is connected with one end K31 of the switch K3, the other end K32 of the switch K3 is connected with the first radio energy receiving circuit 12, the first radio energy receiving circuit 12 is connected with the charging circuit 14 by the switch K4, the charging circuit 14 is connected with the battery 15, the battery 15 is also connected to a voltage converter 16; the first coil 11 is also connected with a first radio energy transmitting circuit 13 through a third end K33 of a switch K3, the first radio energy transmitting circuit 13 is connected with one end of a switch K1, the other end of the switch K1 is connected with a voltage converter 16, the first radio energy transmitting circuit 13 is also connected with a weak transmitting circuit 3, and the weak transmitting circuit 3 is connected with a microprocessor 4 through an amplifying circuit 17; in the present embodiment, the mobile terminal performs reception and transmission of signals through the first wireless power reception circuit 12 and the first wireless power transmission circuit 13, and the mobile terminal charges the battery 15 through the charging circuit 14.
The wireless charger 2 comprises a second coil 21, a second wireless power transmitting circuit 22, a switch K5, a power supply Vcc, a second weak transmitting circuit 23, a second amplifying circuit 24 (in this embodiment, a signal transmitted from the second wireless power transmitting circuit to the second microprocessor is amplified by the second amplifying circuit, the specific amplifying method is the prior art, and will not be described in detail below), and a second microprocessor 25, wherein a power output end of the second wireless power transmitting circuit 22 is connected to the second weak transmitting circuit 23, the second weak transmitting circuit 23 is connected to the second microprocessor 25 by the second amplifying circuit 24, a power input end of the second wireless power transmitting circuit 24 is further connected to the power supply Vcc by a switch K5, and a power charging end of the second wireless power transmitting circuit is connected to the second coil; in this embodiment, the wireless charger transmits a signal through the second wireless power transmitting circuit.
The method comprises the following specific steps:
(1) a mobile terminal is close to a wireless charger, and the wireless charger and the mobile terminal simultaneously acquire a time synchronization signal;
(2) a first wireless electric energy receiving circuit of a mobile terminal outputs a charging signal to a second microprocessor of a wireless charger, the second microprocessor receives the charging signal and starts to charge the mobile terminal, and if the charging signal disappears, the charging is stopped;
(3) when the other mobile terminal is close to the previous mobile terminal, the two mobile terminals start timing by acquiring a time synchronization signal;
(301) comparing the electric quantity percentages of the two mobile terminals, and if the difference between the electric quantity percentages of the two mobile terminals is smaller than a preset set value, restarting timing and continuously comparing the electric quantity percentages of the two mobile terminals;
(302) if the difference between the electric quantity percentages of the two mobile terminals is larger than a preset set value, timing is stopped, after timing is stopped, a first coil of the mobile terminal with low electric quantity percentage obtains a charging signal and outputs the charging signal to a microprocessor of the mobile terminal through a first wireless power receiving circuit, and the microprocessor of the mobile terminal stops timing and simultaneously sends a reverse charging signal to the microprocessor of the mobile terminal with high electric quantity percentage;
(4) the mobile terminal with high electric quantity percentage receives the reverse charging signal and controls the first radio energy transmitting circuit of the mobile terminal to output electric energy to the first radio energy receiving circuit of the mobile terminal with low electric quantity percentage for reverse charging;
(5) and the two mobile terminals repeatedly acquire and compare the electric quantity percentages, and when the difference between the electric quantity percentages is smaller than a preset set value, the reverse charging is stopped.
In this embodiment, the specific methods for acquiring or outputting and controlling the PWM module, which is provided with the timer and used for acquiring or outputting and controlling the signal, in the microprocessor and the second microprocessor are the prior art, and will not be described in detail below.
In the present embodiment, as shown in fig. 5 and 6, one mobile terminal is denoted as 01, and the other mobile terminal is denoted as 02;
the step (1) specifically comprises the following steps: the specific method for acquiring the time synchronization signal comprises the following steps: when a mobile terminal approaches the wireless charger, a first coil of the mobile terminal and a second coil of the wireless charger mutually induct to receive a signal, a K31 end and a K33 end of a switch K3 of the mobile terminal are communicated, the first coil is connected with a first wireless power transmitting circuit, the signal is transmitted to a microprocessor through the first wireless power transmitting circuit, the microprocessor receives the signal and controls a timer in the microprocessor to start timing, the second coil also receives the signal at the same time, the switch K6 is conducted, a second wireless power transmitting circuit is communicated with a second amplifying circuit, the second coil amplifies the signal through the second amplifying circuit and transmits the signal to the second microprocessor, the second microprocessor receives the signal and controls the timer to start timing, the wireless charger and the mobile terminal start timing, when the timing of the wireless charger and the timing of the mobile terminal are synchronous, the terminal K31 and the terminal K32 of a switch K3 of the mobile terminal are connected, the first coil is connected with the first wireless power receiving circuit, the first coil sends a charging signal to the microprocessor through the first wireless power receiving circuit, the microprocessor obtains the charging signal and stops timing, meanwhile, the first wireless power receiving circuit sends the charging signal to the second coil, and meanwhile, the switch K4 is conducted.
The step (2) specifically comprises the following steps: the specific method for receiving the charging signal by the second microprocessor is as follows: the first wireless electric energy receiving circuit sends a charging signal to the wireless charger, after a second coil of the wireless charger receives the signal, the second coil amplifies the signal through a second amplifying circuit by a second wireless electric energy transmitting circuit and then transmits the signal to a second microprocessor, the second microprocessor controls a timer to stop timing and controls a switch K5 to be conducted after receiving the charging signal, a power supply Vcc starts to output electric energy to the second wireless electric energy transmitting circuit, and the electric energy is sent to a first electric energy receiving circuit of the mobile terminal through the second wireless electric energy transmitting circuit to start charging.
The step (3) specifically comprises the following steps: the method for acquiring the time synchronization signal specifically comprises the steps that first coils of two mobile terminals mutually induce to obtain a signal, a K31 end and a K33 end of a switch K3 of the two mobile terminals are communicated, the first coils are connected with a first wireless energy transmitting circuit, the signal is sent to a microprocessor through the first wireless energy transmitting circuit, and the microprocessor receives the signal and controls a timer in the microprocessor to start timing.
As shown in fig. 1, the weak transmitting circuit includes a resistor R0, a resistor R1, and a switch K2, one end of the resistor R0 is connected to the first radio energy transmitting circuit 13, the other end of the resistor R0 is connected in series with the resistor R1, the other end of the resistor R1 is grounded, the switch K2 is connected in parallel with the resistor R0, and the end where the resistor R0 and the resistor R1 are connected is further connected to the amplifying circuit 17, when two mobile terminals are close to each other, a current flowing through the first radio energy transmitting circuit from the first coil may increase instantaneously, and under the action of the weak transmitting circuit, when the first radio energy transmitting circuit operates, a voltage drop across the resistor R0 increases, so that a voltage output by the first radio energy transmitting circuit decreases, thereby protecting the first radio energy transmitting circuit from being not easily damaged.
As shown in fig. 4, step (301) specifically includes: the specific step of comparing the electric quantity percentages of the two mobile terminals is as follows: the method comprises the steps that the microprocessor of the two mobile terminals obtains the power percentage, the rectangular wave duty ratio is determined according to the power percentage, the rectangular wave duty ratio is the working time t1 of the first coil connected with the first radio energy receiving circuit and the working time t2 of the weak transmitting circuit, the rectangular wave duty ratio is determined through the working time t1 and the working time t2, and the power percentage difference value is determined by comparing the rectangular wave duty ratios of the two mobile terminals.
As shown in fig. 2, the second weak transmitting circuit includes a resistor R2, a resistor R3, and a switch K6, one end of the resistor R2 is connected to the second wireless power transmitting circuit 22, the other end of the resistor R2 is connected in series with the resistor R3, the other end of the resistor R3 is grounded, the switch K6 is connected in parallel with the resistor R2, and the second amplifying circuit 24 is further connected to one end of the resistor R2 connected to the resistor R3, when a mobile terminal is close to the wireless charger, a current flowing through the second wireless power transmitting circuit from the second coil may be increased instantaneously, and under the action of the weak transmitting circuit, when the second wireless power transmitting circuit operates, a voltage drop across the resistor R2 becomes large, so that a voltage output by the second wireless power transmitting circuit is reduced, thereby protecting the second wireless power transmitting circuit from being not easy to damage the connection.
The step (302) specifically includes: after the first coil of the mobile terminal with low electric quantity percentage obtains the charging signal, the K31 and the K32 of the switch K3 of the mobile terminal with low electric quantity percentage are conducted, the first coil of the mobile terminal with low electric quantity percentage is communicated with the first radio energy receiving circuit and transmits the charging signal to the microprocessor, the microprocessor of the mobile terminal with low electric quantity percentage receives the charging signal and stops timing, and meanwhile, the switch K4 of the mobile terminal with low electric quantity percentage is conducted.
As shown in fig. 5 and 6, the step (302) specifically includes: if the electric quantity percentage difference of the two mobile terminals is larger than a preset set value, a first coil of the mobile terminal with the high electric quantity percentage is communicated with a first radio energy transmitting circuit; and the first coil of the mobile terminal with low electric quantity percentage is communicated with the first wireless electric energy receiving circuit, and the first wireless electric energy transmitting circuit of the mobile terminal with high electric quantity percentage transmits electric energy to the first wireless electric energy receiving circuit of the mobile terminal with low electric quantity percentage for charging.
The step (4) specifically comprises the following steps: the specific method for acquiring the reverse charging signal comprises the following steps: the first coil of the mobile terminal with high electric quantity percentage receives the reverse charging signal, the K31 end of the switch K3 of the mobile terminal with high electric quantity percentage is communicated with the K33 end, the first coil of the mobile terminal with high electric quantity percentage amplifies the reverse charging signal through the first wireless power transmitting circuit and the amplifying circuit and then transmits the amplified signal to the microprocessor, the microprocessor of the mobile terminal with high electric quantity percentage receives the reverse reset signal and then controls the switch K1 to be conducted, and the first wireless power transmitting circuit of the mobile terminal with high electric quantity percentage outputs electric energy to the first wireless power receiving circuit of the mobile terminal with low electric quantity percentage for reverse charging.
The step (4) specifically comprises the following steps: when charging is carried out, the first coil of the mobile terminal with low electric quantity percentage is communicated with the first wireless electric energy receiving circuit, the first wireless electric energy receiving circuit sends a charging signal to the microprocessor, when the microprocessor receives the charging signal, the charging can be carried out, and if the charging signal is disconnected, the step (1) is repeated.
When charging is started, a first coil of a mobile terminal with high electric quantity percentage is communicated with a first wireless electric energy transmitting circuit, the output voltage of a battery outputs power supply voltage through a voltage converter, when a switch K1 is switched on, the battery is communicated with the first wireless electric energy transmitting circuit through the voltage converter, and the mobile terminal with high electric quantity percentage outputs electric energy to the mobile terminal with low electric quantity percentage through the first wireless electric energy transmitting circuit.
The first coil of the mobile terminal with low electric quantity percentage is connected with the first wireless electric energy receiving circuit, the first wireless electric energy receiving circuit is connected with the charging circuit, and the mobile terminal with low electric quantity percentage receives electric energy output by one end with high electric quantity percentage through the first wireless electric energy receiving circuit.
Above-mentioned structure, when charging a mobile terminal, press close to wireless charger with a mobile terminal, wireless charger can carry out the forward to this mobile terminal and charge, when needs charge to the mobile terminal that another electric quantity percentage is lower, press close to a mobile terminal with another mobile terminal, two mobile terminal's microprocessor can contrast two mobile terminal's electric quantity percentage and control a mobile terminal that electric quantity percentage is high and carry out reverse charging to the mobile terminal that electric quantity percentage is low, two mobile terminal's microprocessor constantly acquires and contrasts two mobile terminal's electric quantity percentage and contrast at the charging process, when two mobile terminal's electric quantity percentage is not big, stop charging, prevent that there is a mobile terminal because of the electric quantity hangs down and shuts down.
Claims (9)
1. A wireless charging method for a mobile phone, the wireless charging method being implemented by more than one mobile terminal and a wireless charger, the wireless charging method comprising: the mobile terminal comprises a first coil, a first radio energy receiving circuit, a first radio energy transmitting circuit, a charging circuit, a battery, a voltage converter, a switch K1, a switch K3, a switch K4, an amplifying circuit, a weak transmitting circuit and a microprocessor, wherein the first coil is connected with one end of the switch K3, the other end of the switch K3 is connected with the first radio energy receiving circuit, the first radio energy receiving circuit is connected with the charging circuit through a switch K4, the charging circuit is connected with the battery, and the battery is also connected with the voltage converter; the first coil is also connected with a first radio energy transmitting circuit through a third end of a switch K3, the first radio energy transmitting circuit is connected with one end of a switch K1, the other end of the switch K1 is connected with a voltage converter, the first radio energy transmitting circuit is also connected with a weak transmitting circuit, and the weak transmitting circuit is connected with a microprocessor through an amplifying circuit;
the wireless charger comprises a second coil, a second wireless power transmitting circuit, a switch K5, a power supply Vcc, a second weak transmitting circuit, a second amplifying circuit and a second microprocessor, wherein the power output end of the second wireless power transmitting circuit is connected with the second weak transmitting circuit, the second weak transmitting circuit is connected with the second microprocessor through the second amplifying circuit, the power input end of the second wireless power transmitting circuit is also connected with the power supply Vcc through a switch K5, and the power charging end of the second wireless power transmitting circuit is connected with the second coil;
the method comprises the following specific steps:
(1) a mobile terminal is close to a wireless charger, and the wireless charger and the mobile terminal simultaneously acquire a time synchronization signal;
(2) a first wireless electric energy receiving circuit of a mobile terminal outputs a charging signal to a second microprocessor of a wireless charger, the second microprocessor receives the charging signal and starts to charge the mobile terminal, and if the charging signal disappears, the charging is stopped;
(3) when the other mobile terminal is close to the previous mobile terminal, the two mobile terminals start timing by acquiring a time synchronization signal;
(301) comparing the electric quantity percentages of the two mobile terminals, and if the difference between the electric quantity percentages of the two mobile terminals is smaller than a preset set value, restarting timing and continuously comparing the electric quantity percentages of the two mobile terminals;
(302) if the difference between the electric quantity percentages of the two mobile terminals is larger than a preset set value, timing is stopped, after timing is stopped, a first coil of the mobile terminal with low electric quantity percentage obtains a charging signal and outputs the charging signal to a microprocessor of the mobile terminal through a first wireless power receiving circuit, and the microprocessor of the mobile terminal stops timing and simultaneously sends a reverse charging signal to the microprocessor of the mobile terminal with high electric quantity percentage;
(4) the mobile terminal with high electric quantity percentage receives the reverse charging signal and controls the first radio energy transmitting circuit of the mobile terminal to output electric energy to the first radio energy receiving circuit of the mobile terminal with low electric quantity percentage for reverse charging;
(5) and the two mobile terminals repeatedly acquire and compare the electric quantity percentages, and when the difference between the electric quantity percentages is smaller than a preset set value, the reverse charging is stopped.
2. The wireless charging method of claim 1, wherein: the step (1) specifically comprises the following steps: the specific method for acquiring the time synchronization signal comprises the following steps: when a mobile terminal approaches the wireless charger, a first coil of the mobile terminal and a second coil of the wireless charger mutually induct to receive a signal, a K31 end and a K33 end of a switch K3 of the mobile terminal are communicated, the first coil is connected with a first wireless power transmitting circuit, the signal is transmitted to a microprocessor through the first wireless power transmitting circuit, the microprocessor receives the signal and controls a timer in the microprocessor to start timing, the second coil also receives the signal at the same time, the switch K6 is conducted, a second wireless power transmitting circuit is communicated with a second amplifying circuit, the second coil amplifies the signal through the second amplifying circuit and transmits the signal to the second microprocessor, the second microprocessor receives the signal and controls the timer to start timing, the wireless charger and the mobile terminal start timing, when the timing of the wireless charger and the timing of the mobile terminal are synchronous, the terminal K31 and the terminal K32 of a switch K3 of the mobile terminal are connected, the first coil is connected with the first wireless power receiving circuit, the first coil sends a charging signal to the microprocessor through the first wireless power receiving circuit, the microprocessor obtains the charging signal and stops timing, meanwhile, the first wireless power receiving circuit sends the charging signal to the second coil, and meanwhile, the switch K4 is conducted.
3. The wireless charging method of claim 1, wherein: weak transmitting circuit includes resistance R0, resistance R1 and switch K2, the one end and the first radio energy transmitting circuit of resistance R0 are connected, resistance R0's the other end sets up with resistance R1 series connection, resistance R1's the other end ground connection, switch K2 and resistance R0 parallel arrangement still are connected with amplifier circuit at the one end that resistance R0 and resistance R1 are connected.
4. The wireless charging method of claim 1, wherein: the step (301) specifically includes: the specific step of comparing the electric quantity percentages of the two mobile terminals is as follows: the method comprises the steps that the microprocessor of the two mobile terminals obtains the power percentage, the rectangular wave duty ratio is determined according to the power percentage, the rectangular wave duty ratio is the working time t1 of the first coil connected with the first radio energy receiving circuit and the working time t2 of the weak transmitting circuit, the rectangular wave duty ratio is determined through the working time t1 and the working time t2, and the power percentage difference value is determined by comparing the rectangular wave duty ratios of the two mobile terminals.
5. The wireless charging method of claim 1, wherein: the weak transmitting circuit of second includes resistance R2, resistance R3 and switch K6, the one end and the second wireless power transmitting circuit of resistance R2 are connected, resistance R2's the other end and resistance R3 series arrangement, resistance R3's the other end ground connection, switch K6 and resistance R2 parallel arrangement still are connected with the second amplifier circuit at the one end that resistance R2 and resistance R3 are connected.
6. The wireless charging method of claim 1, wherein: the step (302) specifically includes: if the electric quantity percentage difference of the two mobile terminals is larger than a preset set value, a first coil of the mobile terminal with the high electric quantity percentage is communicated with a first radio energy transmitting circuit; and the first coil of the mobile terminal with low electric quantity percentage is communicated with the first wireless electric energy receiving circuit, and the first wireless electric energy transmitting circuit of the mobile terminal with high electric quantity percentage transmits electric energy to the first wireless electric energy receiving circuit of the mobile terminal with low electric quantity percentage for charging.
7. The wireless charging method of claim 1, wherein: the step (4) specifically comprises the following steps: when charging is carried out, the first coil of the mobile terminal with low electric quantity percentage is communicated with the first wireless electric energy receiving circuit, the first wireless electric energy receiving circuit sends a charging signal to the microprocessor, when the microprocessor receives the charging signal, the charging can be carried out, and if the charging signal is disconnected, the step (1) is repeated.
8. The wireless charging method of claim 7, wherein: when charging is started, a first coil of a mobile terminal with high electric quantity percentage is communicated with a first wireless electric energy transmitting circuit, the output voltage of a battery outputs power supply voltage through a voltage converter, when a switch K1 is switched on, the battery is communicated with the first wireless electric energy transmitting circuit through the voltage converter, and the mobile terminal with high electric quantity percentage outputs electric energy to the mobile terminal with low electric quantity percentage through the first wireless electric energy transmitting circuit.
9. The wireless charging method of claim 8, wherein: the first coil of the mobile terminal with low electric quantity percentage is connected with the first wireless electric energy receiving circuit, the first wireless electric energy receiving circuit is connected with the charging circuit, and the mobile terminal with low electric quantity percentage receives electric energy output by one end with high electric quantity percentage through the first wireless electric energy receiving circuit.
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