CN104659928A - Wireless charging emitting circuit and device - Google Patents
Wireless charging emitting circuit and device Download PDFInfo
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- CN104659928A CN104659928A CN201410245892.1A CN201410245892A CN104659928A CN 104659928 A CN104659928 A CN 104659928A CN 201410245892 A CN201410245892 A CN 201410245892A CN 104659928 A CN104659928 A CN 104659928A
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- 230000006698 induction Effects 0.000 claims abstract description 65
- 238000005516 engineering process Methods 0.000 claims abstract description 38
- 230000005674 electromagnetic induction Effects 0.000 claims description 14
- 238000003491 array Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- H02J7/025—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a wireless charging system which comprises a wireless charging emitting circuit and a wireless charging receiving circuit. The wireless charging emitting circuit comprises an emitting power supply module 101 and an emitting main control module 102, wherein the emitting power supply module 101 is used for providing a power supply for the emitting main control module; the emitting main control module 102 is used for periodically detecting whether a distance between equipment to be charged and any one of a plurality of emitting induction coils is smaller than a first preset value or not in the scanning stage, and if yes, controlling the coil to output an energy signal to charge the equipment to be charged; the first preset value is the maximal distance that the emitting induction coils and receiving inductance coils are completely coupled. According to the wireless charging system, the emitting circuit adopts a multi-coil array technology and a coil scanning judging technology to improve wireless charging efficiency and increase the wireless charging distance; according to the wireless charging system, through hollowing an emitting circuit PCB and embedding a multi-coil device in the emitting circuit PCB, the thickness of an emitting device is reduced, so that the wireless charging system is suitable for small-sized electronic equipment; the heat dissipation of the emitting circuit is facilitated, and the service life of the emitting device is maintained.
Description
Technical field
The present invention relates to the charging of electronic product, particularly relate to a kind of wireless charging solution and device of efficient, environmental protection.
Background technology
In current market, there is many chargeable portable electric appts, these rechargeable devices are charged by wired connection mostly.Compared with wired charging, the generation of wireless charging technology brings lot of advantages: need not be with charging wire at any time, avoids that charging wire is easily wound around, potential electric shock risk, repeatedly plug be easily to unfavorable factors such as handset port cause damage.
Current wireless charging can be divided three classes according to principle and implementation, i.e. electromagnetic induction, radio wave, electromagentic resonance.(1) principle of electromagnetic induction utilizes the electromagnetic induction between a pair coil to realize charging.A coil is respectively had at transmitting terminal and receiving terminal, transmitting terminal is charger end, the coil be integrated in inside charger is called transmitting induction coil, the coil integrated at charging equipment end is called induction receiving coil, alternating current outwards can produce magnetic field by launching induction coil, and induction receiving coil produces electromagnetic induction after receiving magnetic field, and then produces induced electromotive force, coil will produce induced current afterwards, and the electric current after over commutation just can charge for electronic equipment.The transmission range that this technology is general is less than one centimetre, and user needs charging equipment to be placed on charger surface and charges.(2) principle of radio wave is the radio wave utilizing micro high efficiency receiver to receive space propagation, and emitter is the electronic equipment that directly can insert body of wall commercial power socket, and receiving terminal is the receiving system that can embed electronic equipment to be charged.(3) principle of electromagentic resonance is that the wave frequency that transmitting terminal sends is consistent with the resonance frequency of receiving terminal, makes two coils produce resonance, realizes the transmission of energy.
Three kinds of wireless charging technology are compared, and the through-put power of radio wave technologies is lower, can not complete at short notice and charge to electronic equipment; Electromagentic resonance technology needs to protect required frequency, and there is sky and to shake the problem of high pressure.Due to above 2 points, this solution adopts based on the wireless charging technology of electromagnetic induction, higher compared to the efficiency of other technologies electromagnetic induction technology, fail safe is better.
Qi standard is global first wireless charging standard, the formulation of Qi standard wireless charging is had unified technical specification, the compatibility of same charger to electronic equipment between different brands can be guaranteed, solve the problem that different mobile phone needs to use different charger, improve the recycling of charger, make charger energy-conserving and environment-protective more.This solution meets Qi standard.
Summary of the invention
(1) technical problem that will solve
The existing wireless charging solution based on electromagnetic induction technology is that requirement is launched induction coil and induction receiving coil and accomplished point-to-pointly to aim at completely at present, be coupled completely by two hub of a spools and improve the charge efficiency of wireless charging, if transmitting induction coil and induction receiving coil can not be accomplished to be coupled completely, significantly charge efficiency can be reduced; In addition, existing comparatively complicated based on the wireless charging device radiating circuit of electromagnetic induction technology at present, thickness is not suitable for wearable electronic product, and charging distance is no more than 10 millimeters.
(2) technical scheme
The radiating circuit of wireless charging solution of the present invention adopts multi-coil arrays technology and coil scanning judgment technology to solve existing solution and must accomplish to launch induction coil and the point-to-point problem of aiming at completely of induction receiving coil, and improves efficiency and the distance of wireless charging.Wireless charging device of the present invention, by the embedded multi-coil arrangements of hollow out in radiating circuit pcb board, solves the existing excessive problem not being suitable for wearable electronic product of device thickness.
(3) beneficial effect
Wireless charging solution of the present invention is higher than existing wireless charging solution efficiency, and chargeable wider, charging distance is farther.Wireless charging device thickness of the present invention is less, is more applicable for wearable electronic product.
Present invention employs multi-coil arrays technology and circuit sweeps judgment technology, it is a kind of wireless charging technology based on electromagnetic induction coupling array, the array that wireless charging radiating circuit is made up of a lot of coil, by Feedback of Power scanning, controller, by detecting the coil of electromagnetic coupled array and the degree of coupling of receiving coil, judges that the transmitting coil that the degree of coupling is the highest is also its power supply.This multi-coil arrays combine with technique circuit sweeps judgment technology makes charging equipment no matter be in which kind of direction, always there are a transmitting coil and receiving coil close to unity couping, now other coil is not powered, avoid the waste of electricity, improve charge efficiency and accuracy, and solve transmitting coil and receiving coil must accomplish point-to-point problem of aiming at completely, and movement arbitrarily within the specific limits under ensureing the condition that charging equipment can transmit in maintenance efficient energy, adds the position freedom of charging equipment.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of wireless charging radiating circuit in the present invention;
Fig. 2 is the pictorial diagram of wireless charging radiating circuit in the present invention;
Fig. 3 is the structured flowchart of wireless charging receiving circuit in the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
The present invention proposes a kind of wireless charging system, this system comprises wireless charging radiating circuit and wireless charging receiving circuit.Described wireless charging system is used for charging for charging equipment, and wherein said wireless charging radiating circuit is absolute construction, and wireless charging receiving circuit is arranged on charging equipment, and is electrically connected with the charging structure of described charging equipment; Described wireless charging radiating circuit has multiple transmitting induction coil, and described wireless charging receiving circuit has an induction receiving coil, this system, based on the wireless electromagnetic induction technology of Qi standard, produces by multiple transmitting induction coil and described induction receiving coil the wireless charging that electromagnetic coupled realizes charging equipment.
Fig. 1 shows the structured flowchart of the wireless charging radiating circuit that the present invention proposes.As shown in Figure 1, it comprises:
Emission power module 101, it is for providing power supply to described transmitting main control module;
Launch main control module 102, at sweep phase, whether the distance of any one that described transmitting main control module 102 periodically detects in the induction receiving coil of charging equipment and described multiple transmitting induction coil is less than the first predetermined value, if then control this any one coil to export energy signal, it is charging equipment charging; Described first predetermined value is the ultimate range of launching induction coil and induction receiving coil generation unity couping;
Particularly, whether the distance of one of them accepted in induction coil and described multiple transmitting induction coil that described transmitting main control module detects charging equipment is in the following way less than the first predetermined value:
Described transmitting main control module is one by one to described multiple transmitting induction coil energising, and the transmitting induction coil of current energising outwards can send sweep signal; If induction receiving coil senses described sweep signal, then can with the transmitting coil generation electromagnetic induction of current energising, and then the current value making the transmitting coil place circuit of described current energising export is greater than the second predetermined value, described transmitting main control module is after the current value being greater than the second predetermined value being detected, stop scanning, namely stop being the process of coil electricity one by one, and transfer the coil electricity being continuously current energising to, and continue to export energy signal by this coil; The induction receiving coil be positioned on charging equipment is described charging equipment charging after receiving described energy signal.Wherein, described sweep signal is low-power sweep signal, and it is the electromagnetic signal of 5 volts, 100 milliamperes, to prevent from causing too much energy loss in scanning process.Described energy signal is high-power electric energy signal, and it is 5 volts, 1 electromagnetic signal of pacifying.
In addition, described transmitting main control module also exports the index signal of current charge capacity to charging indicating module;
Coil driver 103, it is between transmitting main control module 102 and multiple transmitting induction coil 104, carries out controlling and changing, to realize the object of voltage stabilization and current stabilization for electric current, voltage signal transmitting main control module 102 being exported to multiple transmitting induction coil;
Multiple transmitting induction coil 104, it is array structure, and it outwards sends sweep signal and energy signal under the control of launching main control module 102, and after sensing receiving coil, produce the induced current being greater than the second predetermined value;
Charging indicating module 105, it indicates current charge capacity according to the current charge capacity index signal of launching main control module, it can be four LED, represent current electric quantity when charging and not completing by the number of the LED being shown as white, after charging complete, four LED are all shown as white to represent charging complete etc.;
Receive feedback module 106, at sweep phase, it for detecting the current signal of the transmitting induction coil of current channel in described multiple transmitting induction coil, and exports the current signal detected to analog-to-digital conversion module 107;
Analog-to-digital conversion module 107, it exports transmitting main control module 102 to after the current signal received from reception feedback module 106 is converted into digital signal.
In addition, described transmitting main control module 102 also has power stage controlling functions, minimum for the power of scanning circuit being made to drop to when launching induction coil and can't detect induction receiving coil, make the degree that static leakage current reaches very little, thus reduce the waste of battery core electricity, make electricity as much as possible for charging to mobile phone wireless.
Transmitting main control module in the present invention in wireless charging radiating circuit exports the sweep signal of certain frequency by SDA (two directions' inputing output) module in conjunction with PWM (pulse width modulation), be supplied to multi-coil arrays successively with Energy transmission, when multi-coil arrays detects that a certain transmitting induction coil obtains the energy back being greater than 3W, be and induction receiving coil detected, next this transmitting induction coil is only had to provide Energy transmission, scanning process brief termination.
Alternatively, partly overlap between described multiple transmitting induction coil setting each other, makes within the specific limits, there are transmitting induction coil and induction receiving coil in optional position close to unity couping, thus raising charge efficiency, make chargeable range wider, charging distance is farther.
Wireless charging radiating circuit in the present invention adopts fretwork technology, in radiating circuit pcb board, hollow out is placed and is launched induction coil, the revolutionary legacy transmission induction coil that is different from is placed in technology on pcb board, this technique significantly decreases the thickness of emitter under the firmly prerequisite of launching induction coil ensure that, it is made to be applicable to miniaturized electronics, such as wireless charging wearable electronic; Meanwhile, adopt fretwork technology to be conducive to the heat radiation of radiating circuit, safeguard the life-span of emitter, thus make wireless charging device stability and durability more; Cost is saved on circuit boards compared to coil printing.
Fig. 2 shows the pictorial diagram of wireless charging radiating circuit in the present invention, the general principle of coil scanning judgment technology is launched induction coil multi-coil (being three-winding in Fig. 2) wireless transmission array exactly and is successively energized, cycle is a clock concussion cycle, when induction receiving coil senses that this of launching in array of sensor coils launches induction coil and can power to it, then main control module just stops scanning process, radiating circuit is just only launched induction coil to one of them and is powered, and allows it be continuously induction receiving coil and provides wireless charging energy.When induction receiving coil is away from transmitting induction coil, scanning process starts again.
Fig. 3 shows the structured flowchart of wireless charging receiving circuit in the present invention.As shown in Figure 3, it comprises:
Induction receiving coil 301, it comprises an induction coil, can with described wireless charging radiating circuit in launch induction coil electromagnetic coupled, be electric energy by the power conversion obtained from described transmitting induction coil;
Receive control module 302, it exports to the rechargeable battery of charging equipment be converted into the charging signals being suitable for charging equipment for the electric power signal exported by induction receiving coil after.
In above-mentioned wireless charging system disclosed by the invention, described wireless charging radiating circuit becomes charging device as independently partial encapsulation, and wireless charging receiving circuit needs to be arranged on charging equipment, its set-up mode comprises: be configured on charging equipment with the form being packaged into housing, or be integrated in charging equipment, or be attached on the housing of described charging equipment.
The present invention is based on the electromagnetic induction technology of Qi standard, adopt multi-coil arrays radiating circuit and coil scanning judgment technology to realize remote, large-scale wireless charging pattern.Array structure is formed owing to adopting multiple coil in wireless charging radiating circuit of the present invention, and by sending sweep signal one by one to detect the mode of charging equipment, overcome the defect of necessary point-to-point charging in prior art, improve charge efficiency and accuracy, and movement arbitrarily within the specific limits under ensureing the condition that charging equipment can transmit in maintenance efficient energy, adds the position freedom of charging equipment.
In addition, the radiating circuit of wireless charging described in the present invention adopts coil fretwork technology in hardware configuration, and make emitter thickness less, radiating effect is better.
Present invention employs multi-coil arrays technology and coil scanning judgment technology.It is a kind of wireless charging technology based on electromagnetic induction coupling array, launch induction coil to be made up of a lot of coil array, launch main control module by detecting the degree of coupling of launching induction coil and induction receiving coil, scanning judges that the transmitting induction coil that the degree of coupling is the highest is also its power supply.This multi-coil arrays combine with technique coil scanning judgment technology makes charging equipment no matter be in optional position in certain limit, always there are a transmitting induction coil and induction receiving coil close to unity couping, now other transmitting induction coil is not powered, avoid the waste of electricity, improve charge efficiency and accuracy, and solve and launch induction coil and induction receiving coil and must accomplish point-to-point problem of aiming at completely, and movement arbitrarily within the specific limits under ensureing the condition that charging equipment can transmit in maintenance efficient energy, add the position freedom of charging equipment.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. wireless charging solution and a device, comprises radiating circuit, receiving circuit and battery core, it is characterized in that, described solution meets Qi standard, based on electromagnetic induction technology, adopts multi-coil arrays technology and coil scanning judgment technology.Described wireless charging device radiating circuit adopts coil fretwork technology.
2. wireless charging solution according to claim 1, it is characterized in that, described multi-coil arrays combine with technique coil scanning judgment technology, improve charge efficiency and accuracy, and movement arbitrarily within the specific limits under ensureing the condition that charging equipment can transmit in maintenance efficient energy, adds the position freedom of charging equipment.
3. wireless charging device according to claim 1, is characterized in that, described wireless charging device radiating circuit pcb board adopts coil fretwork technology, and make emitter thickness less, radiating effect is better.
4. wireless charging solution according to claim 2, it is characterized in that multi-coil arrays technology adopts coiler part overlapping, make within the specific limits, there are transmitting induction coil and induction receiving coil in optional position close to unity couping, thus raising charge efficiency, make chargeable range wider, charging distance is farther.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245892.1A CN104659928A (en) | 2014-06-05 | 2014-06-05 | Wireless charging emitting circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245892.1A CN104659928A (en) | 2014-06-05 | 2014-06-05 | Wireless charging emitting circuit and device |
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| CN104659928A true CN104659928A (en) | 2015-05-27 |
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| CN201410245892.1A Pending CN104659928A (en) | 2014-06-05 | 2014-06-05 | Wireless charging emitting circuit and device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901402A (en) * | 2015-06-03 | 2015-09-09 | 北京有感科技有限责任公司 | Wireless charging system and wireless charging method |
| CN105071552A (en) * | 2015-08-10 | 2015-11-18 | 惠州Tcl移动通信有限公司 | Wireless charging method, system and device, energy emission device and energy reception device |
| CN105576846A (en) * | 2016-02-25 | 2016-05-11 | 苏州立感电子科技有限公司 | Wireless charging system and method |
| WO2018157672A1 (en) * | 2017-02-28 | 2018-09-07 | 深圳市特斯拉无线设备有限公司 | Wireless charging emitter and intelligent charging input and output methods thereof |
| CN110865656A (en) * | 2020-01-16 | 2020-03-06 | 江苏方天电力技术有限公司 | Unmanned aerial vehicle centering system based on mutual inductance detection and control method thereof |
| USD882512S1 (en) | 2018-12-31 | 2020-04-28 | Ge Hybrid Technologies, Llc | Wireless charging receiver |
| CN112803616A (en) * | 2020-12-31 | 2021-05-14 | 国网北京市电力公司 | Spherical relay coil and wireless power transmission system |
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| US20100213939A1 (en) * | 2009-02-25 | 2010-08-26 | Daniel Sodickson | Remote body arrays for high-performance magnetic resonance imaging and spectroscopy |
| CN102753091A (en) * | 2010-02-08 | 2012-10-24 | 皇家飞利浦电子股份有限公司 | Apparatus and method for influencing and/or detecting magnetic particles in a field of view having an array of single-sided transmit coil sets |
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| CN101375483A (en) * | 2006-01-31 | 2009-02-25 | Ls电线有限公司 | Contactless power supply, contactless charging system, and method of charging rechargeable batteries |
| US20100213939A1 (en) * | 2009-02-25 | 2010-08-26 | Daniel Sodickson | Remote body arrays for high-performance magnetic resonance imaging and spectroscopy |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901402A (en) * | 2015-06-03 | 2015-09-09 | 北京有感科技有限责任公司 | Wireless charging system and wireless charging method |
| CN105071552A (en) * | 2015-08-10 | 2015-11-18 | 惠州Tcl移动通信有限公司 | Wireless charging method, system and device, energy emission device and energy reception device |
| CN105071552B (en) * | 2015-08-10 | 2017-12-12 | 惠州Tcl移动通信有限公司 | Wireless charging method, system, device, energy emitting device and receiving device |
| CN105576846A (en) * | 2016-02-25 | 2016-05-11 | 苏州立感电子科技有限公司 | Wireless charging system and method |
| WO2018157672A1 (en) * | 2017-02-28 | 2018-09-07 | 深圳市特斯拉无线设备有限公司 | Wireless charging emitter and intelligent charging input and output methods thereof |
| USD882512S1 (en) | 2018-12-31 | 2020-04-28 | Ge Hybrid Technologies, Llc | Wireless charging receiver |
| CN110865656A (en) * | 2020-01-16 | 2020-03-06 | 江苏方天电力技术有限公司 | Unmanned aerial vehicle centering system based on mutual inductance detection and control method thereof |
| CN112803616A (en) * | 2020-12-31 | 2021-05-14 | 国网北京市电力公司 | Spherical relay coil and wireless power transmission system |
| CN112803616B (en) * | 2020-12-31 | 2022-11-29 | 国网北京市电力公司 | Spherical Relay Coil and Wireless Power Transfer System |
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