CN113612285B - Automatic forward and reverse charging method - Google Patents
Automatic forward and reverse charging method Download PDFInfo
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- CN113612285B CN113612285B CN202110931923.9A CN202110931923A CN113612285B CN 113612285 B CN113612285 B CN 113612285B CN 202110931923 A CN202110931923 A CN 202110931923A CN 113612285 B CN113612285 B CN 113612285B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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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
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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 an automatic forward and reverse charging method, which comprises the following specific steps: 1) The microprocessor acquires the battery power percentage of the mobile terminal, and determines the rectangular wave duty ratio according to the battery power percentage of the mobile terminal; (2) A mobile terminal is closely attached to another mobile terminal, and microprocessors of the two mobile terminals acquire time synchronization signals and start timing; (3) When the two terminals count the same time, the microprocessor compares the rectangular wave duty ratios of the two mobile terminals according to the time synchronizing signals; (4) The microprocessor controls the first coil to be connected with the first wireless electric energy transmitting circuit, and starts to charge the mobile terminal with low battery capacity percentage from the mobile terminal with high battery capacity percentage; (5) The microprocessor continues to repeatedly acquire the battery power percentage of the mobile terminal and compares the rectangular wave duty ratios of the two mobile terminals until the difference of the rectangular wave duty ratios of the two mobile terminals is smaller than a set value, and then charging is stopped.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to an automatic forward and reverse charging method.
Background
At present, electronic devices such as mobile phones, tablet computers, notebook computers, intelligent watches, electric toothbrushes and the like become one of indispensable articles in work and life of people, and the requirements of people on the functions of the electronic devices and the realization convenience are higher. For example, the charging process of the electronic equipment can adopt a wireless charging technology, the limitation of a power line is not needed to be considered, and the abrasion of devices caused by frequent plugging and unplugging of the power line is reduced.
For the electronic equipment supporting wireless charging, except the electronic equipment which can be in a wireless forward charging mode, receiving electric energy transmitted by external equipment; the wireless charging system can also be used as a charging device, electric energy is transmitted to other electronic devices in a wireless charging mode, and after a user is specifically required to unlock the electronic device, the wireless reverse charging mode of the electronic device is manually started, so that the electronic device is used as the charging device to output electric energy, and the process is complicated.
At present, mobile terminals such as a smart phone and the like can be placed in a wireless charger for wireless charging, and two mobile terminals are placed together, so that one mobile terminal can be manually started to charge in the reverse direction, and the other mobile terminal is subjected to wireless charging. The manual operation is relatively troublesome, and ten thousand mobile terminals all start the reverse charging function, and wireless charging circuits and the like in the mobile terminals can be damaged.
In the chinese patent application No. 202011587266.2 and publication No. 2021.04.30, a charging control method, apparatus and electronic device are disclosed, where a first electronic device may obtain first status information indicating whether the first status information can be used as a charging device, detect that the first status information meets a wireless charging condition, automatically control the first electronic device to enter a wireless reverse charging mode, and as the charging device, send electric energy to a second electronic device located in a wireless charging radiation range of the first electronic device and in a wireless forward charging mode, so as to meet a charging requirement of the second electronic device. Therefore, the wireless reverse charging mode can be automatically switched and controlled without manually entering the setting interface of the first electronic equipment, the operation is simple and convenient, and the flexibility of wireless charging control is improved.
However, in the charging control method of the invention, the first electronic device is controlled to stop outputting the electric energy only after the charged device is full of the electric energy, so that the problem of insufficient electric energy of the first electronic device is easy to occur in charging, and if the problem of shutdown of the first electronic device due to the fact that the electric energy is consumed is not noticed, the problem of shutdown of the first electronic device is likely to occur.
Disclosure of Invention
The invention provides an automatic forward and reverse charging method, by which the electric quantity of a mobile terminal can be automatically identified, and when the electric quantity of the two mobile terminals is not different, the charging is automatically stopped, so that the power of one mobile terminal is prevented from being excessively low to cause shutdown.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the automatic forward and reverse charging method is realized through more than one mobile terminal, the mobile terminal comprises a first coil circuit, a second coil circuit and a microprocessor, the first coil circuit comprises a first coil, a first wireless power transmitting circuit, a first wireless power receiving circuit, a charging circuit, a battery and a voltage converter, the first coil is connected with one end of a switch K2, the other end of the switch K2 is connected with the first wireless power receiving circuit, the first coil is also connected with the first wireless power transmitting circuit through a third end of the switch K2, and the first wireless power transmitting circuit is connected with one end of the switch K1; the first wireless electric energy receiving circuit is also connected with a charging circuit, the charging circuit is also connected with a battery, and the battery is connected with the other end of the switch K1 through a voltage converter;
the second coil circuit comprises a second coil, a second wireless electric energy transmitting circuit, a second wireless electric energy receiving circuit, a switch K3, a switch K4 and a weak transmitting circuit, wherein the second coil is connected with one end of the switch K4, the other end of the switch K4 is connected with the second wireless electric energy receiving circuit, and the second wireless electric energy receiving circuit is connected with the microprocessor; the second coil is further connected with a second wireless electric energy transmitting circuit through a third end of the switch K4, the second wireless electric energy transmitting circuit is connected with one end of the switch K3, the other end of the switch K3 is connected with a voltage converter, the second wireless electric energy transmitting circuit is further connected with one end of a weak transmitting circuit, and the other end of the weak transmitting circuit is grounded.
The method comprises the following specific steps:
(1) The microprocessor obtains the battery power percentage of the mobile terminal, and determines the rectangular wave duty ratio according to the battery power percentage of the mobile terminal.
(2) And (3) approaching one mobile terminal to the other mobile terminal, and acquiring time synchronization signals and starting timing by the microprocessors of the two mobile terminals.
(3) When the two terminals are synchronous in timing, the microprocessor compares the rectangular wave duty ratios of the two mobile terminals, and if the difference between the rectangular wave duty ratios of the two mobile terminals is smaller than a preset set value, the step (1) is repeated and timing is repeated; if the battery power is larger than a preset set value, the second coil of the mobile terminal with high battery power percentage sends a charging handshake signal to the microprocessor, and timing is stopped.
(4) And the microprocessor of the mobile terminal with high battery capacity percentage controls the K21 end and the K23 end of the switch K2 to be communicated according to the acquired charging handshake signal, the first coil is connected with the first wireless electric energy transmitting circuit, and the switch K1 is connected with the mobile terminal of the mobile terminal with high battery capacity percentage and transmits electric energy to the mobile terminal with low battery capacity percentage through the first wireless electric energy transmitting circuit.
(5) The microprocessor continues to repeatedly acquire the battery power percentage of the mobile terminal and compares the rectangular wave duty ratios of the two mobile terminals until the difference of the rectangular wave duty ratios of the two mobile terminals is smaller than a preset set value, and then charging is stopped.
According to the structure, when the mobile terminals are required to be charged, the two mobile terminals are close to each other, the microprocessor of the mobile terminal can determine the rectangular wave duty ratio and compare the rectangular wave duty ratios of the two mobile terminals, when the rectangular wave duty ratios of the two mobile terminals differ greatly, the microprocessor can control the mobile terminal with higher battery power percentage to output electric energy to the mobile terminal with lower battery power percentage for charging, and in the charging process, the microprocessor continuously acquires and compares the battery power percentages of the two mobile terminals until the battery power percentages of the two mobile terminals differ less than a set value, charging is stopped, so that the battery power percentages of the two mobile terminals can be in a balanced state finally, and shutdown caused by excessively low electric power of one mobile terminal can be prevented.
Further, the step (1) specifically includes: the "determining the duty ratio of the rectangular wave signal according to the battery power percentage" specifically is to determine the working time t1 of the second coil connected with the second wireless power receiving circuit and the working time t2 of the weak transmitting circuit, determine the duty ratio of the rectangular wave through the working time t1 and the working time t2, compare the rectangular wave duty ratios of the two mobile terminals to determine the power percentage difference value, determine the duty ratio of the rectangular wave through the working time t1 and the working time t2, and compare the rectangular wave duty ratios of the two mobile terminals to determine whether charging is needed.
Further, the weak emission circuit includes resistance R0 and switch K5, resistance R0's one end is connected with second wireless electric energy emission circuit, resistance R0's the other end ground connection, switch K5 is connected with resistance R0's one end, and switch K5's the other end is connected with resistance R0's the other end, the one end that second wireless electric energy emission circuit meets with resistance R0 still is connected with microprocessor, and when two mobile terminals were close to each other, the second coil flowed through the current of second wireless electric energy emission circuit can increase in the twinkling of an eye, under weak emission circuit's effect, and when second wireless electric energy emission circuit during operation, the voltage drop at resistance R0 both ends became big for the voltage of second wireless electric energy emission circuit output reduces, thereby protection second wireless electric energy emission circuit is difficult to damage.
Further, the step (2) specifically includes: the specific acquisition method of the time synchronization signal comprises the following steps: when two mobile terminals are close to each other, the second coils of the two mobile terminals mutually sense and receive a signal, the K41 end and the K43 end of the switch K4 of the two mobile terminals are communicated, the second coils are communicated with the second wireless electric energy transmitting circuit, the second coil firstly transmits the signal to the microprocessor through the second wireless electric energy transmitting circuit, and the microprocessor starts timing after receiving the signal.
Further, the step (3) specifically includes: the sending method of the charging handshake signal comprises the following steps: when the difference of the rectangular wave duty ratios of the two mobile terminals is larger than a preset set value, the K41 end and the K42 end of a switch K4 of the mobile terminal with high battery capacity percentage are communicated, a second coil is connected with a second wireless electric energy receiving circuit, and the second coil sends a charging handshake signal to the microprocessor through the second wireless electric energy receiving circuit.
Further, the microprocessor comprises an analog-to-digital conversion unit, a PWM module and a memory, wherein the analog-to-digital conversion unit receives data sent by the first coil circuit and the second coil circuit, the data are stored in the memory after being analyzed and compared by the PWM module, and the microprocessor collects and collates the battery electric quantity information collected from the mobile terminal and compares the battery electric quantity information after being stored to determine whether charging is needed.
Further, the step (4) specifically includes: if the difference of the rectangular wave duty ratios of the two mobile terminals is larger than a set value, a mobile terminal starts a weak transmitting state of the second wireless electric energy transmitting circuit; and a second coil of the other mobile terminal is communicated with the second wireless electric energy receiving circuit and outputs a charging handshake signal to the microprocessor, and the microprocessor controls the mobile terminal outputting the charging handshake signal to charge the mobile terminal in a weak transmitting state.
Further, the step (4) specifically includes: the K21 end and the K22 end of a switch K2 of the mobile terminal with low battery capacity percentage are conducted, a first coil of the mobile terminal with low battery capacity percentage is communicated with a first wireless electric energy receiving circuit, the first coil of the mobile terminal with low battery capacity percentage sends a charging signal to a microprocessor through the first wireless electric energy receiving circuit and is communicated with the charging circuit, after the microprocessor receives the charging signal, the microprocessor indicates that charging can be performed, if the charging signal is disconnected, the charging is disconnected, and the step (1) is repeated.
Further, when charging is started, a first coil of a mobile terminal with a high battery capacity percentage is communicated with the first wireless electric energy transmitting circuit, the battery output voltage is output to supply voltage through the voltage converter, and when the switch K1 is turned on, the battery is communicated with the first wireless electric energy transmitting circuit through the voltage converter, and the mobile terminal with the high battery capacity percentage is used for outputting electric energy to the mobile terminal with a low battery circuit percentage through the first wireless electric energy transmitting circuit.
Further, a first coil of a mobile terminal with low battery capacity percentage is connected with the first wireless power receiving circuit, the first wireless power receiving circuit is connected with the charging circuit, and the mobile terminal with low battery capacity percentage receives electric energy output by one end with high battery capacity percentage through the first wireless power receiving circuit.
Drawings
Fig. 1 is a schematic circuit diagram of a mobile terminal according to the present invention.
Fig. 2 is a flow chart of the automatic forward and directional charging method of the present invention.
Fig. 3 is a simple schematic of a rectangular wave duty cycle.
Fig. 4 is a schematic diagram showing that the rectangular wave duty ratio of two mobile terminals is larger than a set value.
Fig. 5 is a schematic diagram showing that the rectangular wave duty ratio of two mobile terminals is smaller than a set value.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1 to 5, an automatic forward and reverse charging method is realized by more than one mobile terminal, the mobile terminal comprises a first coil circuit 2, a second coil circuit 3 and a microprocessor 4, the first coil circuit 2 comprises a first coil 21, a first wireless power transmitting circuit 22, a first wireless power receiving circuit 23, a charging circuit 24, a battery 25 and a voltage converter 26, the first coil 21 is connected with one end K21 of a switch K2, the other end K22 of the switch K2 is connected with the first wireless power receiving circuit 23, the first coil 21 is also connected with the first wireless power transmitting circuit 22 through a third end K23 of the switch K2, and the first wireless power transmitting circuit 22 is connected with one end of the switch K1; the first wireless electric energy receiving circuit 23 is also connected with a charging circuit 24, the charging circuit 24 is also connected with a battery 25, and the battery 25 is connected with the other end of the switch K1 through a voltage converter 26; in this embodiment, the mobile terminal transmits signals through the first wireless power transmitting circuit and the first wireless power receiving circuit, and the mobile terminal charges the battery 15 through the charging circuit 24.
The second coil circuit 3 comprises a second coil 31, a second radio energy transmitting circuit 32, a second radio energy receiving circuit 33, a switch K3, a switch K4 and a weak transmitting circuit 34, wherein the second coil 31 is connected with one end K41 of the switch K4, the other end K42 of the switch K4 is connected with the second radio energy receiving circuit 33, and the second radio energy receiving circuit 33 is connected with the microprocessor 4; the second coil 31 is further connected to a second radio energy transmitting circuit 32 through a third terminal K43 of the switch K4, the second radio energy transmitting circuit 32 is connected to one end of the switch K3, the other end of the switch K3 is connected to the voltage converter 26, the second radio energy transmitting circuit 32 is further connected to one end of the weak transmitting circuit 34, and the other end of the weak transmitting circuit 34 is grounded; in this embodiment, the mobile terminal performs signal transmission through the second radio energy transmitting circuit and the second radio energy receiving circuit.
The method comprises the following specific steps:
(1) The microprocessor obtains the battery power percentage of the mobile terminal, and determines the rectangular wave duty ratio according to the battery power percentage of the mobile terminal.
(2) And (3) approaching one mobile terminal to the other mobile terminal, and acquiring time synchronization signals and starting timing by the microprocessors of the two mobile terminals.
(3) And (3) after the timing synchronization of the two terminals, comparing the rectangular wave duty ratios of the two mobile terminals by the microprocessor, and repeating the step (1) and re-timing if the difference of the rectangular wave duty ratios of the two mobile terminals is smaller than a preset set value. If the battery power is larger than a preset set value, the second coil of the mobile terminal with high battery power percentage sends a charging handshake signal to the microprocessor, and timing is stopped. (4) And the microprocessor of the mobile terminal with high battery capacity percentage controls the K21 end and the K23 end of the switch K2 to be communicated according to the acquired charging handshake signal, the first coil is connected with the first wireless electric energy transmitting circuit, and the switch K1 is connected with the mobile terminal of the mobile terminal with high battery capacity percentage and transmits electric energy to the mobile terminal with low battery capacity percentage through the first wireless electric energy transmitting circuit.
(5) The microprocessor continues to repeatedly acquire the battery power percentage of the mobile terminal and compares the rectangular wave duty ratios of the two mobile terminals until the difference of the rectangular wave duty ratios of the two mobile terminals is smaller than a preset set value, and then charging is stopped.
In the present embodiment, as shown in fig. 4 and 5, one mobile terminal is denoted by 01, and the other mobile terminal is denoted by 02.
The step (1) specifically comprises: the "determining the duty ratio of the rectangular wave signal according to the battery power percentage" specifically is to determine the working time t1 of the second coil connected with the second wireless power receiving circuit and the working time t2 of the weak transmitting circuit, determine the duty ratio of the rectangular wave through the working time t1 and the working time t2, compare the rectangular wave duty ratios of the two mobile terminals to determine the power percentage difference value, determine the duty ratio of the rectangular wave through the working time t1 and the working time t2, and compare the rectangular wave duty ratios of the two mobile terminals to determine whether charging is needed.
As shown in fig. 1, the weak transmitting circuit 34 includes a resistor R0 and a switch K5, one end of the resistor R0 is connected to the second radio energy transmitting circuit 32, the other end of the resistor R0 is grounded, the switch K5 is connected to one end of the resistor R0, the other end of the switch K5 is connected to the other end of the resistor R0, one end of the second radio energy transmitting circuit 32 connected to the resistor R0 is further connected to the microprocessor 4, when two mobile terminals are close to each other, the circuit of the second coil flowing through the second radio energy transmitting circuit will increase instantaneously, and under the action of the weak transmitting circuit, when the second radio energy transmitting circuit works, the voltage drop at two ends of the resistor R0 will become large, so that the voltage output by the second radio energy transmitting circuit will decrease, and the second radio energy transmitting circuit will be protected from being damaged easily.
The step (2) specifically comprises: the specific acquisition method of the time synchronization signal comprises the following steps: when two mobile terminals are close to each other, the second coils of the two mobile terminals mutually sense and receive a signal, the K41 end and the K43 end of the switch K4 of the two mobile terminals are communicated, the second coils are communicated with the second wireless electric energy transmitting circuit, the second coil firstly transmits the signal to the microprocessor through the second wireless electric energy transmitting circuit, and the microprocessor starts timing after receiving the signal.
The step (3) specifically comprises: the sending method of the charging handshake signal comprises the following steps: when the difference of the rectangular wave duty ratios of the two mobile terminals is larger than a preset set value, the K41 end and the K42 end of a switch K4 of the mobile terminal with high battery capacity percentage are communicated, a second coil is connected with a second wireless electric energy receiving circuit, and the second coil sends a charging handshake signal to the microprocessor through the second wireless electric energy receiving circuit.
As shown in fig. 1, the microprocessor 4 includes an analog-to-digital conversion unit 41, a PWM module 42 and a memory 43, where the analog-to-digital conversion unit receives data sent by the first coil circuit and the second coil circuit, the data are analyzed and compared by the PWM module, and then stored in the memory, and the microprocessor collects and collates the battery power information collected from the mobile terminal, and then compares the battery power information to determine whether charging is needed.
As shown in fig. 4 and 5, step (4) specifically includes: if the difference of the reported duty ratios of the two mobile terminals is larger than a preset set value, a mobile terminal starts a weak emission state of the second radio energy emission circuit; and a second coil of the other mobile terminal is communicated with the second wireless electric energy receiving circuit and outputs a charging handshake signal to the microprocessor, and the microprocessor controls the mobile terminal outputting the charging handshake signal to charge the mobile terminal in a weak transmitting state.
The step (4) specifically comprises: when charging, the K21 end and the K22 end of the switch K2 of the mobile terminal with low battery capacity percentage are conducted, the first coil of the mobile terminal with low battery capacity percentage is communicated with the first wireless electric energy receiving circuit, the first coil of the mobile terminal with low battery capacity percentage sends a charging signal to the microprocessor through the first wireless electric energy receiving circuit and is communicated with the charging circuit, after the microprocessor receives the charging signal, the charging signal indicates that charging can be conducted, if the charging signal is disconnected, the charging is disconnected, and the step (1) is repeated.
When the switch K1 is turned on, the battery is communicated with the first wireless electric energy transmitting circuit through the voltage converter, and the mobile terminal with high battery capacity percentage outputs electric energy to the mobile terminal with low battery circuit percentage through the first wireless electric energy transmitting circuit.
The first coil of the mobile terminal with low battery capacity percentage is connected with the first wireless power receiving circuit, the first wireless power receiving circuit is connected with the charging circuit, and the mobile terminal with low battery capacity percentage receives the electric energy output by one end with high battery capacity percentage through the first wireless power receiving circuit.
According to the structure, when the mobile terminals are required to be charged, the two mobile terminals are close to each other, the microprocessor of the mobile terminal can determine the rectangular wave duty ratio and compare the rectangular wave duty ratios of the two mobile terminals, when the rectangular wave duty ratios of the two mobile terminals differ greatly, the microprocessor can control the mobile terminal with higher battery power percentage to output electric energy to the mobile terminal with lower battery power percentage for charging, and in the charging process, the microprocessor continuously acquires and compares the battery power percentages of the two mobile terminals until the battery power percentages of the two mobile terminals differ less than a set value, charging is stopped, so that the battery power percentages of the two mobile terminals can be in a balanced state finally, and shutdown caused by excessively low electric power of one mobile terminal can be prevented.
Claims (9)
1. An automatic forward and backward charging method, the charging method is realized by more than one mobile terminal, and the method is characterized in that: the mobile terminal comprises a first coil circuit, a second coil circuit and a microprocessor, wherein the first coil circuit comprises a first coil, a first wireless electric energy transmitting circuit, a first wireless electric energy receiving circuit, a charging circuit, a battery and a voltage converter, the first coil is connected with one end of a switch K2, the other end of the switch K2 is connected with the first wireless electric energy receiving circuit, the first coil is also connected with the first wireless electric energy transmitting circuit through a third end of the switch K2, and the first wireless electric energy transmitting circuit is connected with one end of a switch K1; the first wireless electric energy receiving circuit is also connected with a charging circuit, the charging circuit is also connected with a battery, and the battery is connected with the other end of the switch K1 through a voltage converter;
the second coil circuit comprises a second coil, a second wireless electric energy transmitting circuit, a second wireless electric energy receiving circuit, a switch K3, a switch K4 and a weak transmitting circuit, wherein the second coil is connected with one end of the switch K4, the other end of the switch K4 is connected with the second wireless electric energy receiving circuit, and the second wireless electric energy receiving circuit is connected with the microprocessor; the second coil is also connected with a second wireless electric energy transmitting circuit through a third end of a switch K4, the second wireless electric energy transmitting circuit is connected with one end of a switch K3, the other end of the switch K3 is connected with a voltage converter, the second wireless electric energy transmitting circuit is also connected with one end of a weak transmitting circuit, and the other end of the weak transmitting circuit is grounded;
the method comprises the following specific steps:
(1) The microprocessor acquires the battery power percentage of the mobile terminal, and determines the rectangular wave duty ratio according to the battery power percentage of the mobile terminal;
(2) A mobile terminal is closely attached to another mobile terminal, and microprocessors of the two mobile terminals acquire time synchronization signals and start timing; the specific acquisition method of the time synchronization signal comprises the following steps: when two mobile terminals are close to each other, the second coils of the two mobile terminals mutually sense and receive a signal, the K41 end and the K43 end of the switch K4 of the two mobile terminals are communicated, the second coils are communicated with the second wireless electric energy transmitting circuit, the second coils transmit the signal to the microprocessor through the second wireless electric energy transmitting circuit, and the microprocessor starts timing after receiving the signal;
(3) When the two terminals are synchronous in timing, the microprocessor compares the rectangular wave duty ratios of the two mobile terminals, and if the difference between the rectangular wave duty ratios of the two mobile terminals is smaller than a preset set value, the step (1) is repeated and timing is repeated; if the battery power is larger than a preset set value, the second coil of the mobile terminal with high battery power percentage sends a charging handshake signal to the microprocessor, and timing is stopped;
(4) The microprocessor of the mobile terminal with high battery capacity percentage controls the K21 end and the K23 end of the switch K2 to be communicated according to the acquired charging handshake signal, the first coil is connected with the first wireless electric energy transmitting circuit, and the mobile terminal of the mobile terminal with high battery capacity percentage is conducted by the switch K1 to transmit electric energy to the mobile terminal with low battery capacity percentage through the first wireless electric energy transmitting circuit;
(5) The microprocessor continuously and repeatedly acquires the battery power percentage of the mobile terminal and compares the rectangular wave duty ratios of the two mobile terminals until the difference of the rectangular wave duty ratios of the two mobile terminals is smaller than a preset set value, and then the charging is stopped;
when the rectangular wave duty ratio of the two mobile terminals is larger, the microprocessor can control the mobile terminal with higher battery capacity percentage to output electric energy to the mobile terminal with lower battery capacity percentage for charging, and in the charging process, the microprocessor continuously acquires and compares the battery capacity percentages of the two mobile terminals until the battery capacity percentages of the two mobile terminals are smaller than a set value.
2. An automatic forward and reverse charging method according to claim 1, wherein: the step (1) specifically comprises: the "determining the duty ratio of the rectangular wave signal according to the battery power percentage" specifically is to determine the working time t1 of the second coil connected with the second wireless power receiving circuit and the working time t2 of the weak transmitting circuit, determine the duty ratio of the rectangular wave through the working time t1 and the working time t2, and compare the duty ratios of the rectangular waves of the two mobile terminals to determine the power percentage difference value.
3. An automatic forward and reverse charging method according to claim 2, wherein: the weak transmitting circuit comprises a resistor R0 and a switch K5, one end of the resistor R0 is connected with the second wireless electric energy transmitting circuit, the other end of the resistor R0 is grounded, the switch K5 is connected with one end of the resistor R0, the other end of the switch K5 is connected with the other end of the resistor R0, and one end, connected with the resistor R0, of the second wireless electric energy transmitting circuit is further connected with the microprocessor.
4. An automatic forward and reverse charging method according to claim 1, wherein: the step (3) specifically comprises: the sending method of the charging handshake signal comprises the following steps: when the difference of the rectangular wave duty ratios of the two mobile terminals is larger than a preset set value, the K41 end and the K42 end of a switch K4 of the mobile terminal with high battery capacity percentage are communicated, a second coil is connected with a second wireless electric energy receiving circuit, and the second coil sends a charging handshake signal to the microprocessor through the second wireless electric energy receiving circuit.
5. An automatic forward and reverse charging method according to claim 1, wherein: the microprocessor comprises an analog-to-digital conversion unit, a PWM module and a memory, wherein the analog-to-digital conversion unit receives data sent by the first coil circuit and the second coil circuit, and the data are stored in the memory after being analyzed and compared by the PWM module.
6. An automatic forward and reverse charging method according to claim 1, wherein: the step (4) specifically comprises: if the difference of the rectangular wave duty ratios of the two mobile terminals is larger than a set value, a mobile terminal starts a weak transmitting state of the second wireless electric energy transmitting circuit; and a second coil of the other mobile terminal is communicated with the second wireless electric energy receiving circuit and outputs a charging handshake signal to the microprocessor, and the microprocessor controls the mobile terminal outputting the charging handshake signal to charge the mobile terminal in a weak transmitting state.
7. An automatic forward and reverse charging method according to claim 1, wherein: the step (4) specifically comprises: the K21 end and the K22 end of a switch K2 of the mobile terminal with low battery capacity percentage are conducted, a first coil of the mobile terminal with low battery capacity percentage is communicated with a first wireless electric energy receiving circuit, the first coil of the mobile terminal with low battery capacity percentage sends a charging signal to a microprocessor through the first wireless electric energy receiving circuit and is communicated with the charging circuit, after the microprocessor receives the charging signal, the microprocessor indicates that charging can be performed, if the charging signal is disconnected, the charging is disconnected, and the step (1) is repeated.
8. An automatic forward and reverse charging method according to claim 7, wherein: when the switch K1 is turned on, the battery is communicated with the first wireless electric energy transmitting circuit through the voltage converter, and the mobile terminal with high battery capacity percentage outputs electric energy to the mobile terminal with low battery circuit percentage through the first wireless electric energy transmitting circuit.
9. An automatic forward and reverse charging method according to claim 8, wherein: the first coil of the mobile terminal with low battery capacity percentage is connected with the first wireless power receiving circuit, the first wireless power receiving circuit is connected with the charging circuit, and the mobile terminal with low battery capacity percentage receives the electric energy output by one end with high battery capacity percentage through the first wireless power receiving circuit.
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| JP2013236492A (en) * | 2012-05-09 | 2013-11-21 | Panasonic Corp | Battery module and battery management system |
| KR101457889B1 (en) * | 2013-01-31 | 2014-11-07 | 주식회사 휴아스커뮤니케이션 | Power transmitting apparatus, power receiving apparatus and methods thereof |
| CN106208285B (en) * | 2014-09-11 | 2019-01-22 | 三星电机株式会社 | Contact-less charger, contactless battery and non-contact electric power sending method |
| CN104362703B (en) * | 2014-11-25 | 2017-11-14 | 小米科技有限责任公司 | Wireless charging method and device |
| CN106981900B (en) * | 2017-05-12 | 2020-02-21 | 宇龙计算机通信科技(深圳)有限公司 | Wireless charging method and device |
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