CN113452127B - Wireless charging mobile terminal - Google Patents
Wireless charging mobile terminal Download PDFInfo
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- CN113452127B CN113452127B CN202110931925.8A CN202110931925A CN113452127B CN 113452127 B CN113452127 B CN 113452127B CN 202110931925 A CN202110931925 A CN 202110931925A CN 113452127 B CN113452127 B CN 113452127B
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- 238000000034 method Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 68
- 230000005540 biological transmission Effects 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
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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
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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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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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a wireless charging mobile terminal, which comprises more than one mobile terminal, wherein 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 electric energy transmitting circuit, a first wireless electric energy receiving circuit, a charging circuit, a battery and 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, and the microprocessor continuously acquires and compares the electric quantity of the two mobile terminals in the charging process until the electric quantity difference of the two mobile terminals is smaller than a set value, so that the electric quantity of the two mobile terminals is in a balanced state finally, and shutdown caused by excessively low electric quantity of the mobile terminal can be prevented.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging mobile terminal.
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 patent document with the chinese patent application number 202011587266.2 and the publication date 2021.04.30, a charging control method, a device and an 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 serve as the charging device to transmit 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 a wireless charging mobile terminal, which can realize automatic reverse charging and automatically stop when the electric quantity difference between two mobile terminals is not large.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the wireless charging mobile terminal comprises more than one mobile terminal, wherein 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 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;
according to the structure, when the mobile terminal is required to be charged, the two mobile terminals are close to each other, the microprocessor compares the electric quantity percentages of the two mobile terminals, when the electric quantity percentages of the two mobile terminals differ greatly, the microprocessor can control the mobile terminal with electric quantity to output electric energy to the mobile terminal with lower electric quantity to charge, in the charging process, the microprocessor continuously acquires and compares the electric quantity of the two mobile terminals until the electric quantity differences of the two mobile terminals are smaller than a set value, the charging is stopped, and therefore the electric quantity of the two mobile terminals can be in a balanced state finally, and shutdown caused by the fact that the electric quantity of one mobile terminal is too low can be prevented.
Further, the first wireless power transmitting circuit comprises a first transmitting coil, a first transmitting capacitor C1, a first transmitting capacitor C2, a first transmitting capacitor C3, a first transmitting resistor R1, a first transmitting resistor R2, a first transmitting resistor R3, a first transmitting chip IC1 and a first transmitting chip IC2, wherein the first transmitting coil is connected with the first coil through a third end of a switch K2, a pin 1 to a pin 4 of the first transmitting chip IC2 are commonly connected with one end of the first transmitting coil, the other end of the first transmitting coil is connected with the switch K1, a first transmitting capacitor C3 is connected between two ends of the first transmitting coil, a first transmitting capacitor C2 is connected between a pin 5 to a pin 7 of the first transmitting chip IC2 and the other end of the first transmitting coil, a pin 8 of the first transmitting chip IC2 is connected with a pin 6 of the first transmitting chip IC1, a pin 8 of the first transmitting chip IC1 is commonly connected with the pin 1 through a third end of the switch K2, a first transmitting chip IC1 is also arranged between the pin 7 and the first transmitting chip IC1 through the first transmitting resistor R1, and the first transmitting chip IC1 is also arranged between the first transmitting chip IC1 and the first transmitting resistor R1 through the first transmitting resistor R1; the 4 th pin of the first transmitting chip IC1 is connected with the ground, the 5 th pin of the first transmitting chip IC1 is connected with the ground, so that when the first coil of a mobile terminal is connected with the first wireless electric energy transmitting circuit through the third end of the switch K2, the electric quantity in the battery is output to Vcc through the voltage converter, and when the switch K1 is conducted, vcc provides power for the first wireless electric energy transmitting circuit, and the mobile terminal can output electric energy to the other mobile terminal.
Further, the first wireless power receiving circuit comprises a first receiving coil L1, a first receiving diode D1, a first receiving capacitor C11, a first receiving electrolytic capacitor C21, a first receiving diode D2, a first receiving chip IC11, a first receiving coil L2, a first receiving resistor R21, a first receiving resistor R41 and a first receiving electrolytic capacitor C31, wherein the first receiving coil L1 is connected with the first receiving chip IC11 through the other end of the switch K2, one end of the first receiving coil L1 is connected with the first receiving chip IC11 through the first receiving diode D1, the first receiving capacitor C11 is connected with two ends of the first receiving coil L1 in parallel, the other end of the first receiving coil L1 is grounded, a pin 2 and a pin 7 of the first receiving chip IC11 are commonly connected with the first receiving diode D1, a pin 3 and a pin 4 of the first receiving chip IC11 are commonly connected with the first receiving coil L2, when the first receiving coil R21 and the first receiving coil R21 are connected with the first receiving resistor R21 through the other end of the first receiving diode D1, the first receiving resistor R21 is connected with the first receiving coil R21 in parallel, the other end of the first receiving coil R21 is connected with the first receiving resistor R21, the first receiving resistor R21 is further connected with the first receiving coil R21 through the other end of the first receiving coil R21, the first receiving resistor R21 is connected with the first receiving resistor R21 in parallel, when the other end of the first receiving coil is connected with the first receiving coil R21, the first receiving resistor R21 is connected with the first receiving resistor R21, the first wireless power receiving circuit is connected with the charging circuit and is used for positively charging the battery.
Further, the second wireless power transmitting circuit comprises a second transmitting coil, a second transmitting capacitor C4, a second transmitting capacitor C5, a second transmitting capacitor C6, a second transmitting resistor R4, a second transmitting resistor R5, a second transmitting resistor R6, a second transmitting chip IC3 and a second transmitting chip IC4, wherein the second transmitting coil is connected with the second coil through a third end of a switch K4, a pin 1 of the second transmitting chip IC4 is commonly connected with one end of the second transmitting coil through a pin 4, the other end of the second transmitting coil is connected with a switch K3, a second transmitting capacitor C6 is connected between two ends of the second transmitting coil, a second transmitting capacitor C5 is connected between a pin 5 of the second transmitting chip IC4 and the other end of the second transmitting coil, a pin 8 of the second transmitting chip IC4 is connected with a pin 6 of the second transmitting chip IC3, a pin 8 of the second transmitting chip IC3 is commonly connected with a switch K3 through a pin 8 of the second transmitting chip IC3, a weak IC is arranged between a pin 7 of the second transmitting chip IC3 and a pin 8 of the second transmitting chip IC3 and the second transmitting resistor R6 is also connected with one end of the second transmitting chip IC3 through a second transmitting resistor R3, and the second transmitting chip IC3 is also arranged between the second transmitting chip IC3 and the second transmitting chip IC1 and the second transmitting chip IC3 through a weak IC 1; the 4 th pin of the second transmitting chip IC3 is connected with the ground, and the 5 th pin of the second transmitting chip IC3 is connected with the ground, so that when the second coil is connected with the second wireless electric energy transmitting circuit through the third end of the switch K4, the current between the second electric energy transmitting circuit and the second coil is controlled through the weak transmitting circuit, and the protection circuit is not easy to damage.
Further, the second wireless power receiving circuit includes a second receiving coil L11, a second receiving diode D11, a second receiving capacitor C12, a second receiving electrolytic capacitor C22, a second receiving diode D21, a second receiving chip IC12, a second receiving coil L21, a second receiving resistor R22, a second receiving resistor R42, and a second receiving electrolytic capacitor C32, the second receiving coil L11 is connected to the second coil through the other end of the switch K4, one end of the second receiving coil L11 is connected to the second receiving chip IC12 through the second receiving diode D11, the second receiving capacitor C12 is parallel connected to two ends of the second receiving coil L11, the other end of the second receiving coil L11 is grounded, the second receiving diode D11 is grounded through the second receiving electrolytic capacitor C22, the pin 2 and the pin 7 of the second receiving chip IC12 are commonly connected to the second receiving diode D11, the pin 3 and the pin 4 of the second receiving chip IC12 are commonly connected with one end of a second receiving coil L21, a second receiving diode D21 is arranged between the pin 3 and the pin 4 of the second receiving chip IC12, the second receiving coil L21 is connected with a microprocessor, the other end of the second receiving coil L21 is connected with a second receiving resistor R22, one end of a second receiving resistor R42 is connected with the second receiving resistor R22, the other end of the second receiving resistor R42 is grounded, a second receiving electrolytic capacitor C32 is arranged in parallel with the second receiving resistor R22 and the second receiving resistor R42, a pin 5 of the second receiving chip IC12 is connected between the second receiving resistor R22 and the second receiving resistor R42, the second receiving coil L21 is also connected with a charging circuit, the 1 st, 6 th and 8 th pins of the second receiving chip IC12 are connected in air, thereby, when the second coil of the other mobile terminal is communicated with the second wireless power receiving circuit through the other end of the switch K4, the second wireless power receiving circuit can receive the power output by the first power transmitting circuit of the one mobile terminal and output the received power to the battery through the charging circuit to realize reverse charging.
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 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, 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 schematic structural diagram of a first wireless power transmission circuit according to the present invention.
Fig. 3 is a schematic structural diagram of a first wireless power receiving circuit according to the present invention.
Fig. 4 is a schematic structural diagram of a second wireless power transmitting circuit according to the present invention.
Fig. 5 is a schematic structural diagram of a second radio energy receiving circuit according to the present invention.
Fig. 6 is a flowchart of a charging method of a wireless charging mobile terminal according to the present invention.
Fig. 7 is a simple schematic of a rectangular wave duty cycle.
Fig. 8 is a schematic diagram showing that the rectangular wave duty ratio of two mobile terminals is larger than a set value.
Fig. 9 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.
Example 1
As shown in fig. 1 to 5, a wireless charging mobile terminal comprises 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 charges the battery through the charging circuit.
As shown in fig. 1 to 2, the first wireless power transmitting circuit 22 includes a first transmitting coil 221, a first transmitting capacitor C1, a first transmitting capacitor C2, a first transmitting capacitor C3, a first transmitting resistor R1, a first transmitting resistor R2, a first transmitting resistor R3, a first transmitting chip IC1 and a first transmitting chip IC2, where the first transmitting coil 221 is connected to the first coil 21 through a third end K23 of the switch K2, pins 1 to 4 of the first transmitting chip IC2 are commonly connected to one end of the first transmitting coil 221, the other end of the first transmitting coil 221 is connected to the switch K1, a first transmitting capacitor C3 is connected between two ends of the first transmitting coil 221, a first transmitting capacitor C2 is connected between a pin 5 to a pin 7 of the first transmitting chip IC2 and the other end of the first transmitting coil 221, a pin 8 of the first transmitting chip IC2 is connected to a pin 6 of the first transmitting chip IC1, a pin 8 of the first transmitting chip IC1 is connected to a pin 6 of the first transmitting chip IC1 through a third end K23 of the switch K2, and a pin 1 is further connected to a pin 1 of the first transmitting chip IC1 through a first transmitting resistor R1 and a first transmitting chip 1, and a first transmitting chip IC1 is further connected between a pin 1 and a first transmitting chip 1, and a first transmitting chip IC1 is provided between a pin 1 and a first transmitting chip 1 and a first transmitting resistor R1; the 4 th pin of the first transmitting chip IC1 is connected with the ground, the 5 th pin of the first transmitting chip IC1 is connected with the ground, so that when the first coil of a mobile terminal is connected with the first wireless electric energy transmitting circuit through the third end of the switch K2, the electric quantity in the battery is output to Vcc through the voltage converter, and when the switch K1 is conducted, vcc provides power for the first wireless electric energy transmitting circuit, and the mobile terminal can output electric energy to the other mobile terminal.
As shown in fig. 1 and 3, the first wireless power receiving circuit includes a first receiving coil L1, a first receiving diode D1, a first receiving capacitor C11, a first receiving electrolytic capacitor C21, a first receiving diode D2, a first receiving chip IC11, a first receiving coil L2, a first receiving resistor R21, a first receiving resistor R41, and a first receiving electrolytic capacitor C31, the first receiving coil L1 is connected to the first coil 21 through the other end K22 of the switch K2, one end of the first receiving coil L1 is connected to the first receiving chip IC11 through the first receiving diode D1, the first receiving capacitor C11 is parallel connected to two ends of the first receiving coil L1, the other end of the first receiving coil L1 is grounded, the first receiving diode D1 is grounded through the first receiving electrolytic capacitor C21, the pin 2 and the pin 7 of the first receiving chip IC11 are commonly connected to the first receiving diode D1, the pin 3 and the pin 4 of the first receiving chip IC11 are commonly connected with one end of a first receiving coil L2, a first receiving diode D2 is arranged between the pin 3 and the pin 4 of the first receiving chip IC11, the other end of the first receiving coil L2 is connected with a first receiving resistor R21, one end of a first receiving resistor R41 is connected with the first receiving resistor R21, the other end of the first receiving resistor R41 is grounded, a first receiving electrolytic capacitor C31 is arranged in parallel with the first receiving resistor R21 and the first receiving resistor R41, the pin 5 of the first receiving chip IC11 is connected between the first receiving resistor R21 and the first receiving resistor R41, the first receiving coil L2 is also connected with a charging circuit, the first pins 1, 6 and 8 of the first receiving chip IC11 are in idle connection, when the other end of the first receiving coil is communicated with the first wireless power receiving circuit through a switch K2, the first wireless power receiving circuit is connected with the charging circuit and is used for positively charging the battery.
As shown in fig. 1, the second coil circuit 3 includes 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, the second coil 31 is connected to one end K41 of the switch K4, the other end K42 of the switch K4 is connected to the second radio energy receiving circuit 33, and the second radio energy receiving circuit 33 is connected to the microprocessor 4; the second coil 31 is further connected to the second radio energy transmitting circuit 32 through a third end 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.
As shown in fig. 1 and fig. 4, the second radio energy transmitting circuit 32 includes a second transmitting coil 321, a second transmitting capacitor C4, a second transmitting capacitor C5, a second transmitting capacitor C6, a second transmitting resistor R4, a second transmitting resistor R5, a second transmitting resistor R6, a second transmitting chip IC3 and a second transmitting chip IC4, wherein the second transmitting coil 321 is connected with the second coil 31 through a third end K43 of the switch K4, a pin 1 of the second transmitting chip IC4 is commonly connected with one end of the second transmitting coil 321, the other end of the second transmitting coil 321 is connected with a switch K3, a second transmitting capacitor C6 is connected between two ends of the second transmitting coil, a pin 5 of the second transmitting chip IC4 is connected with the other end of the second transmitting coil 31, a pin 8 of the second transmitting chip IC4 is connected with a pin 6 of the second transmitting chip IC3, a pin 8 of the second transmitting chip IC3 is commonly connected with the pin 1 through a third end K43 of the switch K4, a weak transmitting chip is further connected with a pin 3 of the second transmitting chip IC3 through a pin 7 of the second transmitting chip IC3, and a weak transmitting capacitor C3 is further connected between the pin 7 of the second transmitting chip IC4 and the second transmitting chip IC3 and the other end of the second transmitting coil 31, a weak transmitting capacitor C5 is further connected between the pin 8 of the second transmitting chip IC3 and the second transmitting chip IC3 is provided with the second transmitting capacitor C3 and the second transmitting capacitor C3; the 4 th pin of the second transmitting chip IC3 is connected with the ground, and the 5 th pin of the second transmitting chip IC3 is connected with the ground, so that when the second coil is connected with the second wireless electric energy transmitting circuit through the third end of the switch K4, the current between the second electric energy transmitting circuit and the second coil is controlled through the weak transmitting circuit, and the protection circuit is not easy to damage.
As shown in fig. 1 and 5, the second radio energy receiving circuit 33 includes a second receiving coil L11, a second receiving diode D11, a second receiving capacitor C12, a second receiving electrolytic capacitor C22, a second receiving diode D21, a second receiving chip IC12, a second receiving coil L21, a second receiving resistor R22, a second receiving resistor R42, and a second receiving electrolytic capacitor C32, the second receiving coil L11 is connected to the second coil 31 through the other end K42 of the switch K4, one end of the second receiving coil L11 is connected to the second receiving chip IC12 through the second receiving diode D11, the second receiving capacitor C12 is parallel connected to two ends of the second receiving coil L11, the other end of the second receiving coil L11 is grounded, the second receiving diode D11 is grounded through the second receiving electrolytic capacitor C22, the pin 2 and the pin 7 of the second receiving chip IC12 are commonly connected to the second receiving diode D11, the pin 3 and the pin 4 of the second receiving chip IC12 are commonly connected with one end of a second receiving coil L21, a second receiving diode D21 is arranged between the pin 3 and the pin 4 of the second receiving chip IC12, the second receiving coil L21 is connected with a microprocessor, the other end of the second receiving coil L21 is connected with a second receiving resistor R22, one end of a second receiving resistor R42 is connected with the second receiving resistor R22, the other end of the second receiving resistor R42 is grounded, a second receiving electrolytic capacitor C32 is arranged in parallel with the second receiving resistor R22 and the second receiving resistor R42, a pin 5 of the second receiving chip IC12 is connected between the second receiving resistor R22 and the second receiving resistor R42, the second receiving coil L21 is also connected with a charging circuit, the 1 st, 6 th and 8 th pins of the second receiving chip IC12 are connected in air, thereby, when the second coil of the other mobile terminal is communicated with the second wireless power receiving circuit through the other end of the switch K4, the second wireless power receiving circuit can receive the power output by the first power transmitting circuit of the one mobile terminal and output the received power to the battery through the charging circuit to realize reverse charging.
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 current flowing through the second radio energy transmitting circuit by the second coil 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 is protected from being damaged easily.
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.
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 terminal is required to be charged, the two mobile terminals are close to each other, the microprocessor compares the electric quantity percentages of the two mobile terminals, when the electric quantity percentages of the two mobile terminals differ greatly, the microprocessor can control the mobile terminal with electric quantity to output electric energy to the mobile terminal with lower electric quantity to charge, in the charging process, the microprocessor continuously acquires and compares the electric quantity of the two mobile terminals until the electric quantity differences of the two mobile terminals are smaller than a set value, the charging is stopped, and therefore the electric quantity of the two mobile terminals can be in a balanced state finally, and shutdown caused by the fact that the electric quantity of one mobile terminal is too low can be prevented.
Example 2.
As shown in fig. 1 to 9, a wireless charging mobile terminal of the present embodiment specifically includes:
(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. 8 and 9, 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.
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.
The step (4) specifically comprises: 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 method, 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 according to the battery circuit percentages of the mobile terminals of the mobile phone 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 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 differ less than a set value, charging is stopped, so that the battery capacity percentages of the two mobile terminals are in a balanced state finally, and shutdown caused by excessively low battery capacity of one mobile terminal can be prevented.
Claims (9)
1. A wireless charging mobile terminal, comprising more than one mobile terminal, 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 microprocessor compares the electric quantity percentages of the two mobile terminals, when the electric quantity percentages of the two mobile terminals differ greatly, the microprocessor can control the mobile terminals with electric quantity to output electric energy to the mobile terminals with lower electric quantity for charging, and in the charging process, the microprocessor continuously acquires and compares the electric quantity of the two mobile terminals until the electric quantity differences of the two mobile terminals are smaller than a set value.
2. A wireless charging mobile terminal according to claim 1, characterized in that: the first wireless power transmission circuit comprises a first transmission coil, a first transmission capacitor C1, a first transmission capacitor C2, a first transmission capacitor C3, a first transmission resistor R1, a first transmission resistor R2, a first transmission resistor R3, a first transmission chip IC1 and a first transmission chip IC2, wherein the first transmission coil is connected with the first coil through a third end of a switch K2, a pin 1 to a pin 4 of the first transmission chip IC2 are commonly connected with one end of the first transmission coil, the other end of the first transmission coil is connected with a switch K1, a first transmission capacitor C3 is connected between two ends of the first transmission coil, a first transmission capacitor C2 is connected between a pin 5 to a pin 7 of the first transmission chip IC2 and the other end of the first transmission coil, a pin 8 of the first transmission chip IC2 is connected with a pin 6 of the first transmission chip IC1, a pin 8 and a pin 1 are commonly connected with the switch K1, a pin 1 is also arranged between the first transmission chip IC1 and the first transmission chip IC1 through the first transmission chip IC1 and the first transmission chip IC1, a pin 1 is further arranged between the first transmission chip IC1 and the first transmission chip IC1 through the first transmission resistor R1 and the first transmission chip IC1, and the first transmission chip IC1 is provided with a first transmission capacitor C2 between the pin 8 and the first transmission chip IC 1; the 4 th pin of the first transmitting chip IC1 is connected with the ground, and the 5 th pin of the first transmitting chip IC1 is connected with the ground; when the switch K2 is turned on, the first coil sends out a signal to the first transmitting coil, and then the first transmitting coil outputs a signal to the first transmitting chip IC1 through the first transmitting chip IC2, and the first transmitting chip IC1 sends out a signal to the switch K1 to enable the switch K1 to be turned on, so that the battery supplies power to the first wireless electric energy transmitting circuit.
3. A wireless charging mobile terminal according to claim 1, characterized in that: the first wireless power receiving circuit comprises a first receiving coil L1, a first receiving diode D1, a first receiving capacitor C11, a first receiving electrolytic capacitor C21, a first receiving diode D2, a first receiving chip IC11, a first receiving coil L2, a first receiving resistor R21, a first receiving resistor R41 and a first receiving electrolytic capacitor C31, wherein the first receiving coil L1 is connected with the first coil through the other end of a switch K2, one end of the first receiving coil L1 is connected with the first receiving chip IC11 through the first receiving diode D1, the first receiving capacitor C11 is connected with two ends of the first receiving coil L1 in parallel, the other end of the first receiving coil L1 is grounded, the first receiving diode D1 is grounded through the first receiving electrolytic capacitor C21, a pin 2 and a pin 7 of the first receiving chip IC11 are jointly connected with the first receiving diode D1, the pin 3 and the pin 4 of the first receiving chip IC11 are commonly connected with one end of a first receiving coil L2, a first receiving diode D2 is arranged between the pin 3 and the pin 4 of the first receiving chip IC11, the other end of the first receiving coil L2 is connected with a first receiving resistor R21, one end of a first receiving resistor R41 is connected with the first receiving resistor R21, the other end of the first receiving resistor R41 is grounded, a first receiving electrolytic capacitor C31 is arranged in parallel with the first receiving resistor R21 and the first receiving resistor R41, the pin 5 of the first receiving chip IC11 is connected between the first receiving resistor R21 and the first receiving resistor R41, the first receiving coil L2 is also connected with a charging circuit, and pins 1, 6 and 8 of the first receiving chip IC11 are in idle connection; when the switch K2 is turned on, the first coil sends a signal to the first receiving chip IC11, and the first receiving chip IC11 sends a signal to the first receiving coil, so that a charging signal is sent to the charging circuit through the first receiving coil, and the battery is charged in the forward direction through the charging circuit.
4. A wireless charging mobile terminal according to claim 1, characterized in that: the second wireless power transmitting circuit comprises a second transmitting coil, a second transmitting capacitor C4, a second transmitting capacitor C5, a second transmitting capacitor C6, a second transmitting resistor R4, a second transmitting resistor R5, a second transmitting resistor R6, a second transmitting chip IC3 and a second transmitting chip IC4, wherein the second transmitting coil is connected with the second coil through a third end of a switch K4, a pin 1 of the second transmitting chip IC4 is commonly connected with one end of the second transmitting coil through the pin 4, the other end of the second transmitting coil is connected with a switch K3, a second transmitting capacitor C6 is connected between two ends of the second transmitting coil, a second transmitting capacitor C5 is connected between a pin 5 of the second transmitting chip IC4 and the other end of the second transmitting coil, a pin 8 of the second transmitting chip IC4 is connected with a pin 6 of the second transmitting chip IC3, a pin 8 of the second transmitting chip IC3 is commonly connected with the pin 1, a second resistor R6 is arranged between a pin 7 of the second transmitting chip IC3 and the pin 8, and a weak IC3 is also connected with the second transmitting chip IC3 through the second transmitting resistor R3 and the pin 1 of the second transmitting chip IC3, and the weak IC3 is arranged between the pin 1 and the second transmitting chip IC3 through the second transmitting resistor R3; the 4 th pin of the second transmitting chip IC3 is connected with the air, and the 5 th pin of the second transmitting chip IC3 is grounded; when the switch K4 is turned on, the second coil sends out a signal to the second transmitting coil, and then the second transmitting coil outputs a signal to the second transmitting chip IC3 through the second transmitting chip IC4, and the second transmitting chip IC3 sends out a signal to the switch K3 to enable the switch K3 to be turned on, so that the battery provides power for the second wireless power transmitting circuit.
5. A wireless charging mobile terminal according to claim 1, characterized in that: the second wireless power receiving circuit comprises a second receiving coil L11, a second receiving diode D11, a second receiving capacitor C12, a second receiving electrolytic capacitor C22, a second receiving diode D21, a second receiving chip IC12, a second receiving coil L21, a second receiving resistor R22, a second receiving resistor R42 and a second receiving electrolytic capacitor C32, wherein the second receiving coil L11 is connected with the second coil through the other end of a switch K4, one end of the second receiving coil L11 is connected with the second receiving chip IC12 through the second receiving diode D11, the second receiving capacitor C12 is connected with two ends of the second receiving coil L11 in parallel, the other end of the second receiving coil L11 is grounded, the second receiving diode D11 is grounded through the second receiving electrolytic capacitor C22, a pin 2 and a pin 7 of the second receiving chip IC12 are jointly connected with the second receiving diode D11, the pin 3 and the pin 4 of the second receiving chip IC12 are commonly connected with one end of a second receiving coil L21, a second receiving diode D21 is arranged between the pin 3 and the pin 4 of the second receiving chip IC12, the second receiving coil L21 is connected with a microprocessor, the other end of the second receiving coil L21 is connected with a second receiving resistor R22, one end of a second receiving resistor R42 is connected with the second receiving resistor R22, the other end of the second receiving resistor R42 is grounded, a second receiving electrolytic capacitor C32 is arranged in parallel with the second receiving resistor R22 and the second receiving resistor R42, a pin 5 of the second receiving chip IC12 is connected between the second receiving resistor R22 and the second receiving resistor R42, the second receiving coil L21 is also connected with a charging circuit, and the 1 st, 6 th and 8 th pins of the second receiving chip IC12 are connected in air; when the switch K4 is turned on, the second coil of the other mobile terminal sends a signal to the second receiving chip IC12, and then the second receiving chip IC12 sends a signal to the second receiving coil, so that the second receiving coil sends a receiving signal to the first power transmitting circuit, and thus the second wireless power receiving circuit can receive the power output by the first power transmitting circuit of the one mobile terminal and output the received power to the battery to realize reverse charging.
6. The wireless charging mobile terminal of claim 4, 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.
7. The wireless charging mobile terminal of claim 6, 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.
8. A wireless charging mobile terminal according to claim 1, characterized in that: 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. The wireless charging mobile terminal of 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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| CN210468905U (en) * | 2019-07-25 | 2020-05-05 | 深圳飞安瑞科技股份有限公司 | Wide-voltage wireless charging circuit with standby power consumption less than 0.3W |
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| JP5432283B2 (en) * | 2008-12-12 | 2014-03-05 | ハンリム ポステック カンパニー リミテッド | Jig for manufacturing contactless power receiver and receiver core |
| CN103259339A (en) * | 2012-02-20 | 2013-08-21 | 联想(北京)有限公司 | Terminal device and method for wireless charging between terminal devices |
| JP6127668B2 (en) * | 2013-04-08 | 2017-05-17 | ソニー株式会社 | Electronic equipment and power supply system |
| CN104362703B (en) * | 2014-11-25 | 2017-11-14 | 小米科技有限责任公司 | Wireless charging method and device |
| CN105098945B (en) * | 2015-08-05 | 2018-01-09 | 青岛海信移动通信技术股份有限公司 | One kind can directly charge source adapter |
| CN207542884U (en) * | 2017-12-14 | 2018-06-26 | 广州市宾得电子有限公司 | Wireless charging glue rifle |
| CN108683236A (en) * | 2018-06-27 | 2018-10-19 | 河南省航丰智能科技有限公司 | A kind of mobile terminal OTG charging methods and device |
| US10811913B2 (en) * | 2018-08-06 | 2020-10-20 | Apple Inc. | Wireless charging system with multiple communications modes |
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| CN210468905U (en) * | 2019-07-25 | 2020-05-05 | 深圳飞安瑞科技股份有限公司 | Wide-voltage wireless charging circuit with standby power consumption less than 0.3W |
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