CN107947306B - Wireless quick charging system and method - Google Patents
Wireless quick charging system and method Download PDFInfo
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- CN107947306B CN107947306B CN201711267745.4A CN201711267745A CN107947306B CN 107947306 B CN107947306 B CN 107947306B CN 201711267745 A CN201711267745 A CN 201711267745A CN 107947306 B CN107947306 B CN 107947306B
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- 238000007600 charging Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010277 constant-current charging Methods 0.000 claims abstract description 10
- 238000010280 constant potential charging Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005674 electromagnetic induction Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 208000028659 discharge Diseases 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- H02J7/025—
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
Abstract
The invention provides a wireless quick charging system and a wireless quick charging method, which comprise the following steps: a wireless transmitter; a wireless receiver mutually coupled with the wireless transmitter; the switch circuit is connected between a battery and the wireless receiver and used for controlling the on-off of a charging loop of the battery; and the control circuit is connected with the switch circuit and the wireless receiver and controls the wireless receiver or the wireless transmitter to output a constant-current or constant-voltage charging signal to charge the battery according to the charging state of the battery. According to the invention, a voltage conversion circuit is not required to be arranged on the receiver, and a proper charging signal is output by the wireless transmitter or the receiver to directly charge the battery, so that the loss is reduced, the charging efficiency of a wireless charging system is improved, and wireless rapid charging is realized.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless quick charging system and a wireless quick charging method.
Background
At present, most of traditional wireless charging devices output a constant voltage through a wireless receiver of the wireless charging device, then a battery of the wireless charging device is charged by a charging management IC (Integrated Circuit) of the wireless charging device, or the wireless receiver integrates the charging management IC, the wireless receiver adopts follow-up output after rectification and filtering, and outputs a fixed voltage value higher than the charging voltage of the battery, but because the charging management IC needs to perform voltage conversion, certain loss occurs, so that the efficiency from the wireless receiver to the battery charging is further reduced, the efficiency of the whole wireless charging system is low, and meanwhile, the heat dissipation of the device is not facilitated.
Disclosure of Invention
The invention aims to provide a novel wireless quick charging system and a novel wireless quick charging method, and aims to solve the problem that the traditional wireless charging equipment has low wireless charging efficiency due to certain loss when voltage conversion is carried out.
In one aspect, the present invention provides a wireless fast charging system, including:
a wireless transmitter;
a wireless receiver mutually coupled with the wireless transmitter;
the switch circuit is connected between a battery and the wireless receiver and used for controlling the on-off of a charging loop of the battery; and
and the control circuit is connected with the switch circuit and the wireless receiver and controls the wireless receiver or the wireless transmitter to output a constant-current or constant-voltage charging signal to charge the battery according to the charging state of the battery.
On the other hand, the invention also provides a wireless quick charging method, which comprises the following steps:
detecting a state of charge of the battery;
and controlling a wireless receiver or a wireless transmitter to output a constant-current or constant-voltage charging signal to charge the battery according to the charging state of the battery, wherein the wireless transmitter is coupled with the wireless receiver.
The wireless quick charging system provided by the invention does not need to independently arrange a voltage conversion circuit on the wireless receiver or other positions, and the wireless transmitter or the wireless receiver outputs a proper charging signal to directly charge the battery, so that the loss is reduced, the charging efficiency of the wireless charging system is improved, and the wireless quick charging of the charged equipment is realized.
Drawings
Fig. 1 is a schematic structural diagram of a wireless fast charging system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a wireless fast charging system according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a wireless fast charging system according to a second embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a wireless fast charging system according to a preferred embodiment of the present invention includes a wireless transmitter 10, a wireless receiver 20 coupled to the wireless transmitter 10, a switch circuit 30 and a control circuit 40.
The switch circuit 30 is connected between the battery 100 and the wireless receiver 20 and used for controlling the on-off of a charging loop of the battery 100, the control circuit 40 is connected with the switch circuit 30 and the wireless receiver 20 and controls the wireless receiver 20 or the wireless transmitter 10 to output a constant-current or constant-voltage charging signal to charge the battery 100 according to the charging state of the battery 100. Specifically, the wireless transmitter 10 may be disposed in a charging base of the wireless quick charging system in the embodiment of the present invention, and the wireless receiver 20, the switch circuit 30 and the control circuit 40, which are coupled to the wireless transmitter 10, are disposed in a device to be charged, which may be an electronic device such as a smart phone and a tablet computer.
Referring to fig. 2, in one embodiment, the switching circuit 30 includes a low voltage direct charge management IC 31 for outputting a low voltage constant current charging signal and a normal charge management IC 32 for outputting a constant voltage charging signal.
The wireless receiver 20 outputs a voltage, and is controlled by the control circuit 40 to select the normal charge management IC 32 or the low-voltage direct charge management IC to charge the battery 100.
When the battery 100 is in the constant current charging state, the low voltage direct charging management IC charges the battery 100, and at this time, the low voltage direct charging management IC turns on the built-in low impedance MOS to directly output the voltage and current output by the wireless receiver 20, so as to charge the battery 100 without voltage conversion therebetween. As the voltage of the battery 100 increases, the control circuit 40 controls the output of the wireless receiver 20 to follow the increase of the voltage of the battery 100 in real time, and always maintains the set current charging. Because the internal resistance of the built-in low-impedance MOS is extremely low, the circuit loss is extremely low, and the charging current can be very large under the condition of the same heating. The quick charging in the constant current stage is realized, and the charging time is greatly shortened.
When the state of the battery 100 is in a constant voltage, trickle, pulse or unknown state of charge, the battery 100 is charged by the general charge management IC 32, at this time, the wireless receiver 20 outputs a fixed voltage, and the general charge management IC 32 charges the battery 100 after conversion.
The charging state of the battery 100 is detected by the low voltage direct charging management IC or the normal charging management IC 32, and the detected data is transmitted to the control circuit, and the control circuit determines which charging IC is turned on for charging.
In the constant current stage, the wireless receiver 20 directly charges the battery 100 without voltage conversion, so that the efficiency is high, the loss is small, and the charging current can be greatly increased, thereby greatly saving the charging time in the constant current stage and realizing the rapid charging of the charged device or the battery. In addition, during the charging process in the constant current stage and the constant voltage stage, the voltage and the current can be adjusted by adjusting the turn ratio of the electromagnetic induction coils in the two receivers, for example, connecting a plurality of induction coils in series and parallel or connecting coil taps with different proportions.
Referring to fig. 3, in another embodiment, the switch circuit 30 includes a switch tube, an input end of the switch tube is connected to the wireless receiver 20, an output end of the switch tube is connected to the battery 100, and a control end of the switch tube is connected to the control circuit 40. Preferably, the switch tube is implemented by a low impedance MOS tube or a combination circuit thereof. In addition, the wireless quick charging system further comprises a detection circuit 50, wherein the detection circuit 50 is connected with the charging loop of the battery 100 and is used for detecting the electrical parameters of the battery 100, and the electrical parameters comprise voltage, current and temperature. In the embodiment of the present invention, the wireless receiver 20 outputs the voltage, which is controlled by the control circuit 40, and the battery 100 is charged through the switch circuit 30 and the detection circuit 50, and the voltage output by the wireless receiver 20 directly charges the battery 100 without voltage conversion except for the loss of each circuit, so that the charging efficiency is high, the loss is small, and the rapid charging is realized.
In the charging stage, the control circuit 40 controls the wireless receiver 20 to give a voltage or current control command required for charging according to the charging logic defined by the system and the set current in combination with the state of the detection circuit 50, adjusts the voltage or current by communicating with the wireless transmitting terminal, turns on the switch circuit 30 to charge the battery 100, and turns off the switch circuit 30 to stop charging if the charging is completed or not. In addition, during the charging process in the constant current stage and the constant voltage stage, the voltage and the current can be adjusted by adjusting the turn ratio of the electromagnetic induction coils in the two receivers, for example, connecting a plurality of induction coils in series and parallel or connecting coil taps with different proportions. Alternatively, the voltage current may be adjusted by merely adjusting parameters of a voltage conversion circuit provided in the wireless transmitter 10.
Further, the switch circuit 30 further includes a discharge management circuit 60, and in the discharge stage, the control circuit 40 controls the discharge management circuit 60 to discharge according to the system discharge logic and the load condition, in combination with the state of the detection circuit 50, and when the discharge reaches the cut-off voltage, the discharge management circuit 60 determines to discharge.
In the embodiment of the present invention, there is also provided a wireless fast charging method, including the following steps:
the state of charge of the battery is detected.
And controlling a wireless receiver 20 or a wireless transmitter 10 to output a constant-current or constant-voltage charging signal to charge the battery according to the charging state of the battery, wherein the wireless transmitter and the wireless receiver are coupled with each other.
According to the wireless quick charging method provided by the embodiment of the invention, the wireless quick charging system does not need to independently arrange a voltage conversion circuit on the wireless receiver or at other positions, and the wireless transmitter or the wireless receiver outputs a proper charging signal to directly charge the battery, so that the loss is reduced, the charging efficiency of the wireless charging system is improved, and the wireless quick charging of the charged equipment is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A wireless rapid charging system, comprising:
a wireless transmitter;
a wireless receiver mutually coupled with the wireless transmitter;
the switch circuit is connected between a battery and the wireless receiver and used for controlling the on-off of a charging loop of the battery; and
and the control circuit is connected with the switch circuit and the wireless receiver, controls the wireless receiver or the wireless transmitter to output a constant-current or constant-voltage charging signal to charge the battery according to the charging state of the battery, and adjusts the voltage and the current by adjusting the turn ratio of an electromagnetic induction coil in the receiver in the charging process of a constant-current stage and a constant-voltage stage.
2. The wireless rapid charging system according to claim 1, wherein the switching circuit includes a low-voltage direct-charge management IC for outputting a low-voltage constant-current charging signal and a normal-charge management IC for outputting a constant-voltage charging signal.
3. The wireless rapid charging system of claim 1, further comprising a detection circuit connected to the charging loop of the battery for detecting an electrical parameter of the battery.
4. The wireless fast charging system of claim 3, wherein said switching circuit comprises a switching tube, an input terminal of said switching tube is connected to said wireless receiver, an output terminal of said switching tube is connected to said battery, and a control terminal of said switching tube is connected to said control circuit.
5. The wireless fast charging system of claim 4, wherein said switching transistor is a low impedance MOS transistor.
6. A wireless fast charging method, comprising:
detecting a state of charge of the battery;
controlling a wireless receiver or a wireless transmitter to output a constant current or constant voltage charging signal to charge the battery according to the charging state of the battery, wherein the wireless transmitter and the wireless receiver are coupled with each other,
in the charging process of the constant current stage and the constant voltage stage, the voltage and the current can be adjusted by adjusting the turn ratio of an electromagnetic induction coil in the receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711267745.4A CN107947306B (en) | 2017-12-05 | 2017-12-05 | Wireless quick charging system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711267745.4A CN107947306B (en) | 2017-12-05 | 2017-12-05 | Wireless quick charging system and method |
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| CN107947306A CN107947306A (en) | 2018-04-20 |
| CN107947306B true CN107947306B (en) | 2020-03-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947306B (en) * | 2017-12-05 | 2020-03-27 | 广东小天才科技有限公司 | Wireless quick charging system and method |
| KR102411250B1 (en) * | 2018-05-15 | 2022-06-22 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | Charging target device, wireless charging method and system |
| CN110912211B (en) * | 2018-09-14 | 2021-01-22 | 中兴通讯股份有限公司 | Charging control method and device and terminal equipment |
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| CN106451705A (en) * | 2016-12-20 | 2017-02-22 | 北京小米移动软件有限公司 | Electronic equipment, wireless charging system, equipment, method and device |
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2017
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Patent Citations (10)
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| CN2622901Y (en) * | 2003-04-17 | 2004-06-30 | 曾玉福 | Power source device of electronic door lock |
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| CN107947306A (en) | 2018-04-20 |
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