CN108429360B - Wireless charging system - Google Patents
Wireless charging system Download PDFInfo
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- CN108429360B CN108429360B CN201810306585.8A CN201810306585A CN108429360B CN 108429360 B CN108429360 B CN 108429360B CN 201810306585 A CN201810306585 A CN 201810306585A CN 108429360 B CN108429360 B CN 108429360B
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- 230000005284 excitation Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
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- 230000009286 beneficial effect Effects 0.000 abstract description 2
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F17/00—Coin-freed apparatus for hiring articles; Coin-freed facilities or services
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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
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H02J7/0027—
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- H02J7/025—
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- Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of wireless charging, in particular to a wireless charging system, which comprises at least one wireless charging transmitter and at least one wireless charging receiver; the wireless charging transmitter comprises a transmitting end antenna, and the transmitting end antenna is used for transmitting wireless signals to at least one wireless charging receiver; the wireless charging receiver comprises a receiving end antenna and a resonant circuit module connected with the receiving end antenna, the receiving end antenna receives wireless signals sent by the sending end antenna, the resonant circuit module senses wireless signal frequencies on the receiving end antenna and generates corresponding feedback signals, the receiving end antenna sends the feedback signals to the sending end antenna, and the wireless charging transmitter changes the transmitting parameters according to the feedback signals. The beneficial effects are that: long service distance and wide application range.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging system.
Background
Along with the continuous development of social civilization and the acceleration of life rhythm, people's life has been separated from various electronic equipment, for example fruit cell-phone, electric toothbrush, electric tool and notebook etc. and electronic products brought convenience for people, and simultaneously, its battery capacity often has not satisfied people's normal use, need charge it after using for a period of time. However, general wired charging is troublesome, a charging socket needs to be found, and since the installation of a large number of sockets affects the beauty of the environment, there are not so many sockets in a general place.
In order to solve this problem, in recent years, a universal charger, a mobile charger, a wireless charging device, and the like have appeared on the market. Among them, wireless charging devices are popular among the public. With the application of wireless charging technology of apple mobile phones, wireless charging is becoming more popular. However, the current wireless charging equipment adopts an electromagnetic induction type charging mode, and the equipment can normally work only after being placed near an electronic product or attached, so that the transmission distance is limited, and the using distance is limited. In addition, the wireless charging technology is disordered in development and has no unified specification, so that the charging power is small, longer charging time is needed, and the wireless charging technology cannot be suitable for all charging platforms or simultaneously charge a plurality of electronic devices.
Therefore, in view of the shortcomings in the prior art, a new technical solution is needed in the art to solve the problem.
Disclosure of Invention
The invention aims to solve the problems of small power, short using distance, small application object range and the like of the conventional wireless charging equipment, and provides a wireless charging system which can be widely applied to automobiles, mobile phones, household appliances and the like.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
a wireless charging system comprising at least one wireless charging transmitter and at least one wireless charging receiver; the wireless charging transmitter comprises a transmitting end antenna, and the transmitting end antenna is used for transmitting wireless signals to at least one wireless charging receiver; the wireless charging receiver comprises a receiving end antenna and a resonant circuit module connected with the receiving end antenna, the receiving end antenna receives wireless signals sent by the sending end antenna, the resonant circuit module senses the wireless signals on the receiving end antenna and generates corresponding feedback signals, the receiving end antenna sends the feedback signals to the sending end antenna, and the wireless charging transmitter changes the transmitting parameters according to the feedback signals.
Preferably, the wireless charging transmitter further comprises a wireless receiving signal processing module and a transmitting end main control module connected with the wireless receiving signal processing module, wherein the wireless receiving signal processing module is connected with the transmitting end antenna, the wireless receiving signal processing module receives and analyzes the feedback signal and transmits the data information obtained after analysis to the transmitting end main control module, and the transmitting end main control module sets corresponding transmitting parameters according to the data information.
Preferably, the wireless charging transmitter further comprises a wireless data networking module, the wireless data networking module is connected with the sending end main control module, and the wireless data networking module acquires data information received by the sending end main control module and uploads the data information to the background server.
Preferably, the wireless charging transmitter further comprises a display module, the display module is connected with the transmitting end main control module, the display module is used for displaying the charging two-dimensional code and transmitting a payment result of payment by scanning the charging two-dimensional code to the transmitting end main control module, and the transmitting end main control module sets corresponding transmitting parameters according to the payment result.
Preferably, the wireless charging transmitter further comprises a transmitting module, wherein the transmitting module is connected with the transmitting end antenna, and the transmitting module is used for sequentially transmitting wireless signals to the transmitting end antenna from low to high in frequency.
Preferably, the wireless charging transmitter further comprises a power transmitting module, wherein the power transmitting module is connected with the transmitting module, and the power transmitting module is used for setting corresponding charging power according to the feedback signal.
Preferably, the wireless charging transmitter further comprises a power supply module and a power supply adapting module, and the power supply adapting module, the power supply module and the power transmitting module are sequentially connected.
Preferably, the resonant circuit module comprises a switch, and the switch is a MOS transistor switch, a relay switch, a solid-state relay switch, or an optocoupler switch.
Preferably, the wireless charging receiver further comprises an alternating current signal-to-direct current power supply module and a current and voltage detection module, and the resonant circuit module, the alternating current signal-to-direct current power supply module and the current and voltage detection module are sequentially connected.
Preferably, the wireless charging receiver further comprises a battery, and the alternating current signal-to-direct current power module, the battery and the current and voltage detection module are sequentially connected.
Compared with the prior art, the invention has the beneficial effects that:
1. The wireless charging transmitter of the wireless charging system transmits wireless signals to the wireless charging receiver, the resonant circuit module of the wireless charging receiver senses the frequency of the wireless signals, after sensing the frequency signals matched with the frequency of the resonant circuit module, the resonant circuit module converts alternating voltage signals obtained by generated resonance into direct-current voltage stabilizing signals through a bridge stack to be directly converted into charged direct-current voltage signals, and the charged equipment can also charge batteries, and the batteries can stably output the charged equipment after storing electric quantity, so that long-distance wireless charging is realized.
2. The wireless data networking module acquires the data information on the main control module of the transmitting end, and the background server or the network background software can acquire the payment charging condition through the data information acquired by the wireless data networking module, remotely control the opening and closing of the wireless charging transmitter, and set parameters such as charging power, resonant frequency, current, voltage and the like.
3. The invention is applicable to the remote wireless charging of charging equipment in different fields, from small-sized charging equipment to large-sized charging equipment, such as wireless charging treasures and wireless automobile charging stations, and can also be integrated into mobile phones or computer notebooks, etc., and has wide application range, so that the life of people is faster and more convenient; and the present invention occupies a smaller area of the charging area, whether applied to private or public devices.
Drawings
FIG. 1 is a schematic diagram of the functional architecture of a wireless charging transmitter of the present invention;
fig. 2 is a functional schematic diagram of a wireless charging receiver according to the present invention;
FIG. 3 is a schematic diagram of a wireless charging transmitter scanning surrounding wireless charging receivers in accordance with the present invention;
FIG. 4 is a feedback signal 1 logic level algorithm of the present invention;
FIG. 5 is a feedback signal 0 logic level algorithm of the present invention;
fig. 6 is a communication method of the wireless charging system of the present invention.
In the figure: the wireless charging system comprises a wireless charging transmitter 1, a transmitting end antenna 10, a wireless receiving signal processing module 11, a transmitting end main control module 12, a wireless data networking module 13, a display module 14, a transmitting module 15, a power transmitting module 16, a power source module 17, a power source adapting module 18, a wireless charging receiver 2, a resonant circuit module 21, a module for converting an alternating current signal into a direct current signal, a module for detecting 23 current and voltage, a 24 battery and a receiving end main controller 25.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The components and arrangements of specific examples are described below by way of example only and are not intended to limit the invention. In the description of the present invention, it should be noted that, unless otherwise specified, the terms "connected" and "connected" should be construed broadly, and for example, they may be mechanical or electrical, they may be internal to two elements or they may be directly connected or they may be indirectly connected through an intermediate medium, and it is possible for those skilled in the art to understand the specific meaning of the terms according to the specific circumstances.
This embodiment is shown in fig. 1 to 3: a wireless charging system comprises a wireless charging transmitter 1 and more than two wireless charging receivers 2, wherein the wireless charging receivers 2 are connected with a charged device or a battery. When one wireless charging transmitter 1 charges a plurality of wireless charging receivers 2 of different resonance frequencies, they do not interfere with each other.
The wireless charging transmitter 1 comprises a transmitting end antenna 10, wherein the transmitting end antenna 10 is used for transmitting wireless signals to at least one wireless charging receiver 2; the wireless charging receiver 2 includes a receiving end antenna 20, and a resonant circuit module 21 connected to the receiving end antenna 20, where the receiving end antenna 20 receives the wireless signal sent by the sending end antenna 10, and the resonant circuit module 21 senses the frequency of the wireless signal on the receiving end antenna 20 and generates a corresponding feedback signal, and the receiving end antenna 20 sends the feedback signal to the sending end antenna 10, and the wireless charging transmitter 1 changes the transmitting parameter according to the feedback signal.
In this embodiment, the wireless charging transmitter 1 acquires the frequency of the wireless charging receiver 2 or acquires a charging status signal, such as charging, full charge, suspension of charging, abnormal charging, and other information such as ID of the wireless charging receiver 2, by transmitting a variable or fixed frequency wireless signal, and detecting and analyzing a feedback signal received on the transmitting antenna 10. The system can also switch the transmitting power and the switching state of the wireless charging transmitter 1 according to the feedback signal. Wherein, the feedback signal obtained by the wireless charging transmitter 1 through the transmitting end antenna 10 can be optionally encrypted according to importance, and the data information in the feedback signal can be obtained after analysis
Specifically, the wireless charging transmitter 1 further includes a wireless receiving signal processing module 11, and a transmitting end main control module 12 connected to the wireless receiving signal processing module 11, where the wireless receiving signal processing module 11 is connected to the transmitting end antenna 10, the wireless receiving signal processing module 11 receives and analyzes the feedback signal, and sends the data information obtained after analysis to the transmitting end main control module 12, and the transmitting end main control module 12 sets corresponding transmitting parameters according to the data information.
The wireless charging transmitter 1 comprises a wireless data networking module 13, the wireless data networking module 13 is connected with the transmitting end main control module 12, and the wireless data networking module 13 acquires data information received by the transmitting end main control module 12 and uploads the data information to a background server or network background software. The system uploads the charging state of the charged equipment or the position of the charged equipment through the wireless data networking module 13, so that the operations such as time counting, charging and the like are facilitated.
Specifically, the background server or the network background software can control the wireless charging transmitter 1 to initiate a payment process through the data information acquired by the wireless data networking module 13. In this embodiment, the wireless charging transmitter 1 further includes a display module 14, where the display module 14 is connected to the transmitting end main control module 12, and the display module 14 is configured to display a charging two-dimensional code and send a payment result of payment by scanning the charging two-dimensional code to the transmitting end main control module 12, and the transmitting end main control module 12 sends the payment result to a network background software or a background server.
The network background software or the background server sends corresponding control signals to the sending end main control module 12 to control the opening and closing of the wireless charging transmitter 1, pay charges, change the settings of parameters such as charging power, resonant frequency, current, voltage and the like.
The wireless charging transmitter 1 further comprises a transmitting module 15, the transmitting module 15 is connected with the transmitting end antenna 10, the transmitting module 15 is used for sequentially transmitting wireless signals to the transmitting end antenna 10 from low to high in frequency, and one wireless charging transmitter 1 can scan a plurality of wireless charging receivers 2 with different frequencies through the transmitting end antenna 10.
The wireless charging transmitter 1 further comprises a power transmitting module 16, wherein the power transmitting module 16 is connected with the transmitting module 15, and the power transmitting module 16 is used for setting corresponding charging power according to the feedback signal.
The wireless charging transmitter 1 further comprises a power supply module 17 and a power supply adapting module 18, and the power supply adapting module 18, the power supply module 17 and the power transmitting module 16 are sequentially connected.
The wireless charging receiver 2 further comprises an alternating current signal-to-direct current power supply module 22 and a current and voltage detection module 23, and the resonant circuit module 21, the alternating current signal-to-direct current power supply module 22 and the current and voltage detection module 23 are sequentially connected.
The wireless charging receiver 2 further comprises a battery 24, and the ac signal-to-dc power module 22, the battery 24, and the current-voltage detection module 23 are sequentially connected.
The resonance circuit module 21 of the wireless charging receiver 2 of this embodiment is configured to generate resonance by using a wireless signal with the same frequency as the self-resonance frequency obtained by using the resonance principle, and to send an alternating current voltage signal obtained by the generated resonance to a charged device or a battery, and the battery is stored and then stably output to the charged device. The resonant circuit module 21 includes a switch, which is a MOS transistor switch, a relay switch, a solid-state relay switch, or an optocoupler switch.
The switch of the resonant circuit module 21 of the wireless charging receiver 2 defaults to a closed state, and the resonant circuit module 21 can switch the switch state according to a fixed protocol according to the operating state of the wireless charging receiver 2. The resonant circuit module 21 can change the inductance value by the method of inserting the magnetic rod into the inductor so as to change the resonant frequency, and meanwhile, the thickness and the number of turns of the coil can be changed so as to change the receivable power, so that the resonant circuit module is suitable for charging different products.
The wireless charging receiver 2 of the wireless charging system of the embodiment further includes a receiving end main controller 25, the receiving end main controller 25 is connected with the current and voltage detection module 23 and the resonant circuit module 21, and the receiving end main controller 25 can obtain data information such as a charging state and an ID number of the charged device.
The communication steps of the wireless charging system of the present invention are as shown in fig. 6: the wireless charging transmitter 1 of this embodiment scans resonance of the wireless charging receiver 2 from low frequency to high frequency, records the resonance frequency once the matching resonance frequency is scanned, and inquires the charging state information and ID number of the current charged device. The wireless charging transmitter 1 transmits a periodic signal with a scanning period of 2T, the former T time being a resonance frequency excitation signal, the latter T time being an idle signal, transmits N (N is 50 or 100) such periodic signals for synchronizing the wireless charging receiver 2, and detects whether a feedback signal is received or not every idle period, and if not, stops transmitting the frequency. If so, the flow of receiving the state data is entered, and the level signal is judged.
The switch of the resonant circuit module 21 of the wireless charging receiver 2 is closed by default, and the capacitor and the inductor of the resonant circuit form a loop, so that resonance can be generated after receiving an excitation signal of resonance frequency. When the switch of the wireless charging receiver 2 is separated, the resonance circuit capacitor and the inductor do not form a loop, and resonance does not occur after receiving an excitation signal of resonance frequency. According to the above principle, as shown in fig. 4 and 5, the logic of the feedback signal is set to "0" and "1".
The flow of receiving the status data is: the wireless charging transmitter 1 transmits a resonance excitation signal T/2 time, and in the 3/2T time, whether the received data is logic 0 or 1 is judged according to the acquired signal. The wireless charging transmitter 1 stops transmitting for a period of time and then receives the next BIT data.
After all wireless charging receivers 2 are queried, the wireless excitation signal enters a continuous transmitting stage. The system can also inquire the charging time data on the wireless charging receiver according to the condition of paying to judge whether the charging time data is expired, and if the charging time data is expired, the charging is stopped. The wireless charging transmitter 1 continues to scan the other wireless charging receivers 2 for feedback signals and repeats the above steps when the corresponding resonant frequency is matched.
While particular embodiments of the present invention have been described above with reference to the accompanying drawings, it will be understood by those skilled in the art that these are by way of example only, and that various changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention.
Claims (8)
1. A wireless charging system, characterized by comprising at least one wireless charging transmitter (1) and at least one wireless charging receiver (2); the wireless charging transmitter (1) comprises a transmitting end antenna (10), wherein the transmitting end antenna (10) is used for transmitting wireless signals to at least one wireless charging receiver (2); the wireless charging receiver (2) comprises a receiving end antenna (20) and a resonant circuit module (21) connected with the receiving end antenna (20), wherein the receiving end antenna (20) receives wireless signals sent by the sending end antenna (10), the resonant circuit module (21) senses the wireless signals on the receiving end antenna (20) and generates corresponding feedback signals, the receiving end antenna (20) sends the feedback signals to the sending end antenna (10), and the wireless charging transmitter (1) changes the transmitting parameters according to the feedback signals;
The wireless charging transmitter (1) further comprises a wireless receiving signal processing module (11) and a transmitting end main control module (12) connected with the wireless receiving signal processing module (11), the wireless receiving signal processing module (11) is connected with the transmitting end antenna (10), the wireless receiving signal processing module (11) receives and analyzes the feedback signal and transmits data information obtained after analysis to the transmitting end main control module (12), and the transmitting end main control module (12) sets corresponding transmitting parameters according to the data information;
The wireless charging transmitter (1) further comprises a wireless data networking module (13), the wireless data networking module (13) is connected with the transmitting end main control module (12), and the wireless data networking module (13) acquires data information received by the transmitting end main control module (12) and uploads the data information to a background server;
The communication method of the wireless charging system comprises the following steps:
S1, scanning resonance of a wireless charging receiver (2) from low frequency to high frequency by a wireless charging transmitter (1), recording corresponding resonance frequency once the matched resonance frequency is scanned, and inquiring charging state information and ID number of current charged equipment;
The wireless charging transmitter (1) transmits a periodic signal with a scanning period of 2T, the front T time is a resonant frequency excitation signal, the rear T time is an idle signal, N periodic signals are transmitted, N is 50 or 100 and used for synchronizing the wireless charging receiver (2), whether a feedback signal is received in each idle time T period or not is detected, if not, the transmission of the corresponding resonant frequency excitation signal is stopped, if so, the flow of receiving state data is entered, and the level signal is judged;
The switch of the resonant circuit module (21) of the wireless charging receiver (2) is closed by default, and the capacitor and the inductor of the resonant circuit form a loop, so that resonance is generated after receiving an excitation signal of resonance frequency; when the switch of the wireless charging receiver (2) is separated, the capacitor and the inductor of the resonant circuit do not form a loop, and resonance cannot be generated after receiving an excitation signal of resonance frequency;
Setting logic of the feedback signal to be "0" and "1";
the flow of receiving the status data is specifically as follows:
For a periodic signal with the period of 2T, the wireless charging transmitter (1) transmits a resonance excitation signal T/2 time, and in the 3/2T time, whether received data is logic 0 or 1 is judged according to the acquired signal;
in the flow of receiving state data, the wireless charging transmitter (1) stops transmitting, and after idle preset time, receives next BIT data;
S2, judging whether all wireless charging receivers (2) are inquired; if all the wireless charging receivers (2) are inquired, the wireless excitation signals enter a continuous transmitting stage, and whether the charging time data on the wireless charging receivers are expired is judged according to the condition that the charging time data is paid, and if so, the charging is stopped; if all wireless charging receivers (2) are not queried, the wireless charging transmitter (1) continues to scan the rest wireless charging receivers (2), detects whether feedback signals exist, and repeats the processes from step S1 to step S2 when the feedback signals are matched with the corresponding resonant frequencies.
2. The wireless charging system according to claim 1, wherein the wireless charging transmitter (1) further comprises a display module (14), the display module (14) is connected to the transmitting end main control module (12), the display module (14) is configured to display a charged two-dimensional code, and send a payment result of payment by scanning the charged two-dimensional code to the transmitting end main control module (12), and the transmitting end main control module (12) sets a corresponding transmission parameter according to the payment result.
3. A wireless charging system according to claim 1, wherein the wireless charging transmitter (1) further comprises a transmitting module (15), the transmitting module (15) being connected to the transmitting antenna (10), the transmitting module (15) being configured to sequentially transmit wireless signals to the transmitting antenna (10) from low to high frequency.
4. A wireless charging system according to claim 3, wherein the wireless charging transmitter (1) further comprises a power transmitting module (16), the power transmitting module (16) being connected to the transmitting module (15), the power transmitting module (16) being adapted to set the corresponding charging power in dependence of the feedback signal.
5. A wireless charging system according to claim 4, wherein the wireless charging transmitter (1) further comprises a power supply module (17) and a power supply adaptation module (18), the power supply module (17) and the power transmission module (16) being connected in sequence.
6. A wireless charging system according to claim 1, wherein the resonant circuit module (21) comprises a switch, which is a MOS transistor switch, or a relay switch, or a solid state relay switch, or an optocoupler switch.
7. A wireless charging system according to claim 1, wherein the wireless charging receiver (2) further comprises an ac signal to dc power module (22) and a current-voltage detection module (23), and the resonant circuit module (21), the ac signal to dc power module (22) and the current-voltage detection module (23) are sequentially connected.
8. The wireless charging system according to claim 7, wherein the wireless charging receiver (2) further comprises a battery (24), and the ac signal to dc power module (22), the battery (24), and the current voltage detection module (23) are sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810306585.8A CN108429360B (en) | 2018-04-08 | 2018-04-08 | Wireless charging system |
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| CN201810306585.8A CN108429360B (en) | 2018-04-08 | 2018-04-08 | Wireless charging system |
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| CN108429360B true CN108429360B (en) | 2024-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109742833B (en) * | 2018-12-15 | 2021-07-20 | 深圳先进技术研究院 | Transmitting terminal, receiving terminal, wireless charging system and wireless charging method |
| CN110415446A (en) * | 2019-07-03 | 2019-11-05 | 江苏鸿越新材料科技有限公司 | A kind of wireless charging charge system and method |
| CN112769249B (en) * | 2019-11-04 | 2023-07-14 | 北京小米移动软件有限公司 | Wireless charging method, wireless charging transmitter, terminal and storage medium |
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