CN106329651A - Wireless charging device of mobile terminal, wireless charging system and method thereof - Google Patents
Wireless charging device of mobile terminal, wireless charging system and method thereof Download PDFInfo
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- CN106329651A CN106329651A CN201610840720.8A CN201610840720A CN106329651A CN 106329651 A CN106329651 A CN 106329651A CN 201610840720 A CN201610840720 A CN 201610840720A CN 106329651 A CN106329651 A CN 106329651A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 16
- 239000012634 fragment Substances 0.000 claims description 19
- 239000011324 bead Substances 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 15
- 230000033228 biological regulation Effects 0.000 claims description 14
- 230000009123 feedback regulation Effects 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005236 sound signal Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 abstract description 10
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
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Classifications
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- H02J7/025—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a wireless charging device of a mobile terminal, a wireless charging system and a method thereof. The wireless charging system comprises a wireless charger, a mobile terminal and an earphone with an audio line; the base of the wireless charger is provided with a charging column; a coil is wound in the charging column by a plurality of turns; a wireless charging device is arranged in the mobile terminal; the earphone is in plugging connection with the mobile terminal; the audio line is wound on the surface of the charging column; when the base is connected with a power source, the coil in the charging column is energized and generates an electromagnetic field, and the audio line at the surface of the charging column senses the electromagnetic field and generates current; the current is inputted into the wireless charging device through the earphone; the wireless charging device judges whether to start a multimedia playing mode or a wireless charging mode according to the plugging state of the earphone; and when the wireless charging mode is started, the current outputted by the audio line is converted into charging current for charging the battery of the mobile terminal. The audio line is adopted to replace the induction coil at the back surface of the mobile terminal to achieve wireless charging, and therefore, costs can be decreased, and the difficulty of structural design can be reduced.
Description
Technical field
The present invention relates to charging technique field, the wireless charging device of a kind of mobile terminal, wireless charging
Electricity system and method.
Background technology
The wireless charging technology of main flow can use electromagnetic induction, radio wave, the big principle of magnetic resonance three, main flow skill at present
Art scheme uses electromagnetic induction.The wireless charging mobile phone of market 90% is all based on electromagnetic induction principle at present, its effect of charging
Rate is high and is easier on this mobile terminal higher to volume requirement of mobile phone implement.Induction wireless charging technology
Principle is respectively to arrange a coil in transmission and receiving terminal, similar transformer equipment.The coil of transmitting terminal is connected to cable power
Producing electromagnetic signal, electromagnetic signal is propagated by space.The coil-induced of receiving terminal produces after the electromagnetic signal of transmitting terminal
Raw electric current, electric current is supplied to electrical equipment or battery again after circuit conversion, thus realizes wireless charging.
Traditional wireless charging device as it is shown in figure 1, due to charging distance require the shortest, for ensure charge efficiency,
In the range of mobile phone 1 is placed on wireless charging base 2 and need to be placed on the mark of wireless charging base, to ensure the receiving coil of mobile phone
Align with the transmitting coil 3 of wireless charging chassis interior, otherwise can reduce charge efficiency.
In order to realize wireless charging, mobile phone terminal must increase by one group of induction coil (i.e. receiving coil).Charge efficiency is with sense
The group number answering coil is directly proportional.So inevitably increase the hardware cost of mobile phone, add structure design difficulty.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In place of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide the wireless charging of a kind of mobile terminal
Device, wireless charging system and method thereof, it is intended to solve existing mobile terminal and cause for realizing wireless charging increase induction coil
The problem that hardware cost increases, structure design becomes difficulty.
It is as follows that the present invention solves the technical scheme that technical problem used:
The wireless charging device of a kind of mobile terminal, is connected with earphone, and it includes CPU, handset module and charging module；
Described CPU judges to start multimedia pattern or wireless charging pattern according to the insert state of earphone, and export right
The enable signal answered；The electric current that the tone frequency channel wire of earphone exports, when starting wireless charging pattern, is transferred to charging by handset module
Module；When starting multimedia pattern, audio signal output in left and right is play to earphone；Described charging module is according to enabling letter
Number control described current versus cell charged state.
In the wireless charging device of described mobile terminal, described charging module includes:
Left-handed opening unit, for controlling the input state of left electric current according to the low and high level enabling signal, and exports a left side for correspondence
Charging voltage；
Left voltage regulation unit, for left charging voltage dividing potential drop is obtained left branch pressure voltage, and carries out voltage stabilizing to parting piezoelectricity pressure on the left side；
Left control feedback unit, charges to battery for left electric current is converted to left charging current, and adopting left charging current
Sample voltage with part piezoelectricity pressure ratio on the left side compared with the size with the left charging current of feedback regulation；
Right switch element, for controlling the input state of right electric current according to the low and high level enabling signal, and exports the right side of correspondence
Charging voltage；
Right voltage regulation unit, for right charging voltage dividing potential drop is obtained right branch pressure voltage, and carries out voltage stabilizing to parting piezoelectricity pressure on the right side；
Right control feedback unit, charges to battery for right electric current is converted to right charging current, and adopting right charging current
Sample voltage with part piezoelectricity pressure ratio on the right side compared with the size with the right charging current of feedback regulation.
In the wireless charging device of described mobile terminal, described handset module include L channel shell fragment, R channel shell fragment,
First magnetic bead, the second magnetic bead, the first resistance, the second resistance, the 3rd resistance, the first electric capacity and the second electric capacity；
Described R channel shell fragment connects one end and the charging module of the first magnetic bead, and the other end of the first magnetic bead connects the first resistance
One end and one end of the first electric capacity, the other end of the first resistance connects R channel, the other end ground connection of the first electric capacity；L channel bullet
Sheet connects one end and the charging module of the second magnetic bead；The other end of the second magnetic bead connects one end of the second resistance, second electric capacity
One end and one end of the 3rd resistance；The other end of the second resistance connects L channel, the other end ground connection of the second electric capacity；3rd resistance
The other end connect the first power end.
In the wireless charging device of described mobile terminal, described left-handed opening unit include the first audion, the 4th resistance,
5th resistance and the 3rd electric capacity；
The base stage of described first audion connects the GPIO mouth of CPU by the 4th resistance, also by the 5th resistance eutral grounding；One or three
The colelctor electrode of pole pipe connects L channel shell fragment；The emitter stage of the first audion connect one end of the 3rd electric capacity, left voltage regulation unit and
Left control feedback unit；The other end ground connection of the 3rd electric capacity.
In the wireless charging device of described mobile terminal, described left voltage regulation unit includes source of stable pressure, adjustable resistance and
Six resistance;
The negative electrode of described source of stable pressure connects one end of the 6th resistance, one end of adjustable resistance and left control feedback unit, source of stable pressure
Reference edge connect the sliding end of adjustable resistance, the anode of source of stable pressure connects the other end and the ground of adjustable resistance, the 6th resistance
The other end connects one end of the 3rd electric capacity and left control feedback unit.
In the wireless charging device of described mobile terminal, described left control feedback unit include comparator, display lamp,
Two audions, the 3rd audion, the 4th audion, the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance；
The emitter stage of described second audion connects one end of the 7th resistance；The base stage of the second audion connects the 3rd audion
Emitter stage, the colelctor electrode of the 4th audion and the other end of the 7th resistance；The colelctor electrode of the second audion connects the positive pole of battery
With one end of the tenth resistance, the base stage of the 3rd audion connects one end and one end of the 9th resistance, the three or three pole of the 8th resistance
The colelctor electrode of pipe connects the positive pole of display lamp, the minus earth of display lamp, and the other end of the 8th resistance connects the another of the 7th resistance
One end and the other end of the 6th resistance, the other end of the 9th resistance connects outfan and the base stage of the 4th audion of comparator,
The grounded emitter of the 4th audion, the inverting input of comparator connects the other end of the tenth resistance, and the homophase of comparator is defeated
Enter end and connect one end of the 6th resistance.
A kind of wireless charging system, it includes wireless charger, mobile terminal and the earphone of band tone frequency channel wire；
It is provided with charging column on the base of described wireless charger, in charging column, is wound with some circle coils；Described mobile terminal
Inside it is provided with described wireless charging device；Earphone and mobile terminal grafting, tone frequency channel wire is wrapped in the surface of charging column；
When base switches on power, coil electricity in charging column also produces electromagnetic field, the tone frequency channel wire sense of charging pile surface wrap
This electromagnetic field should be arrived and produce electric current；This electric current inputs to wireless charging device by earphone；Described wireless charging device according to
The insert state of earphone judges to start multimedia pattern or wireless charging pattern；When starting wireless charging pattern, will
The electric current of tone frequency channel wire output is converted to charging current and charges to the battery of mobile terminal.
A kind of wireless charging method using described wireless charging system, comprising:
When step A, the base of wireless charger switch on power, coil electricity in charging column also produces electromagnetic field, charging pile table
The tone frequency channel wire that face is wound around senses this electromagnetic field and produces electric current；
Step B, the wireless charging device of mobile terminal judge to start multimedia pattern still according to the insert state of earphone
Wireless charging pattern；
Step C, when start wireless charging pattern time, wireless charging device the electric current that tone frequency channel wire exports is converted to charging current to
The battery charging of mobile terminal.
In described wireless charging method, described step B specifically includes:
Step B1, the CPU of wireless charging device have detected whether that earphone inserts: if having, and start intervalometer, perform step B2；Not yet
Have, continue detection；
Step B2, before Preset Time reaches, it is judged that earphone whether extract and again insertable into: if having, start wireless charging mould
Formula, the enable signal of the GPIO mouth output high level of CPU；If no, then starting multimedia pattern, GPIO mouth exports low electricity
Flat enable signal.
In described wireless charging method, described step C specifically includes:
Step C1, when starting wireless charging pattern, wireless charging device controls electric current according to the low and high level enabling signal
Input state, and export the charging voltage of correspondence；
Step C2, charging voltage dividing potential drop is obtained branch pressure voltage, and branch pressure voltage is carried out voltage stabilizing；
Step C3, convert electrical current into charging current and battery is charged, and by the sampled voltage of charging current and branch pressure voltage ratio
Relatively with the size of feedback regulation charging current.
Compared to prior art, the wireless charging device of mobile terminal, wireless charging system and the side thereof that the present invention provides
Method, wireless charging system includes wireless charger, mobile terminal and the earphone of band tone frequency channel wire；Arrange on the base of wireless charger
There is charging column, in charging column, be wound around some circle coils；Wireless charging device it is provided with in mobile terminal；Earphone is inserted with mobile terminal
Connecing, tone frequency channel wire is wrapped in the surface of charging column；When base switches on power, coil electricity in charging column also produces electromagnetic field,
The tone frequency channel wire of charging pile surface wrap senses this electromagnetic field and produces electric current；This electric current inputs to wireless charging Denso by earphone
Put；Described wireless charging device judges to start multimedia pattern or wireless charging pattern according to the insert state of earphone；
When starting wireless charging pattern, the electric current that tone frequency channel wire exports is converted to charging current and charges to the battery of mobile terminal.Profit
The induction coil replacing the mobile terminal back side with earpiece audio line realizes wireless charging, not only saves cost, and will not account for
With too much space, also reduce structure design difficulty.
Accompanying drawing explanation
Fig. 1 is traditional wireless charging device schematic diagram.
Fig. 2 is the structured flowchart of the wireless charging system that the present invention provides.
Fig. 3 is the schematic diagram of the wireless charging system that the present invention provides.
Fig. 4 is the circuit diagram of handset module in the wireless charging device that the present invention provides.
Fig. 5 is the circuit diagram of charging module in the wireless charging device that the present invention provides.
Fig. 6 is the wireless charging method flow chart of the wireless charging system that the present invention provides.
Detailed description of the invention
The present invention provides the wireless charging device of a kind of mobile terminal, wireless charging system and method thereof, utilizes earphone sound
Frequently line replaces the induction coil at the mobile terminal back side, and improves the circuit of charging module, not only saves cost, and
Too much space will not be taken, alleviate structure design difficulty.For making the purpose of the present invention, technical scheme and advantage more clear
Chu, clearly, the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.Should be appreciated that tool described herein
Body embodiment only in order to explain the present invention, is not intended to limit the present invention.
Please refer to Fig. 2 and Fig. 3, the wireless charging system that the present invention provides includes wireless charger 10, mobile terminal
20 and the earphone 30 of band tone frequency channel wire.It is provided with charging column 120 on the base 110 of described wireless charger 10, twines in charging column 120
Around N circle coil.It is provided with wireless charging device 210 in described mobile terminal 20.Earphone 30 is inserted in mobile terminal 20, and
Tone frequency channel wire is wrapped in the surface of charging column 120.The present embodiment arranges a charging column on the base of existing wireless charger, will
It is internal that the existing coil (as shown in Fig. 1 broken circle) being arranged in base arranges charging column 120.The tone frequency channel wire utilizing earphone twines
The induction coil at the mobile terminal back side is replaced around charging column 120 surface.Tone frequency channel wire can be headband receiver, ear type ear
Machine, the tone frequency channel wire of mike.
After base 110 plugs in, the alternating current of 220V is converted to 5V unidirectional current, the coil electricity in charging column 120
(stably loading the voltage of 12V), and produce galvanomagnetic-effect, outwards produce an electromagnetic field.According to electromagnetic induction principle, charging pile
The tone frequency channel wire of 120 surface wrap constitutes coil, can sense this electromagnetic field and produce electric current.This electric current is defeated by earphone interface
Enter to wireless charging device 210.Described wireless charging device 210 judges to start multimedia according to the insert state of earphone 30
Pattern or wireless charging pattern；When starting wireless charging pattern, be converted to fill by the electric current that the tone frequency channel wire of earphone 30 exports
Electricity electric current charges to the battery of mobile terminal 20, thus realizes wireless charging function.When starting multimedia pattern, perform
Existing earphone playing function.
In the present embodiment, described wireless charging device 210 includes CPU 211, handset module 212 and charging module 213.Institute
State CPU 211 and judge to start multimedia pattern or wireless charging pattern according to the insert state of earphone 30, and export right
The enable signal answered.The electric current that tone frequency channel wire exports, when starting wireless charging pattern, is transferred to charging by described handset module 212
Module 213；When starting multimedia pattern, audio signal output in left and right is play to earphone.Described charging module 213 basis
Enable signal and control the charged state of described current versus cell: be charged as enabled when signal is high level, tone frequency channel wire is defeated
The electric current gone out is converted to charging current and charges the battery；If enable signal is low level, then stop charging.
Listening music still to carry out wireless charging to judge user to be desirable to by insertion earphone, the present embodiment is according to ear
Machine plug number of times in Preset Time carries out judging which kind of function it performs.Specifically include: CPU has first detected whether earphone
Inserting, if having, starting intervalometer, the most then continue detection.Then before Preset Time reaches, it is judged that whether earphone is extracted
And again insertable into: if having, think that user is intended to carry out wireless charging, the enable signal of the GPIO mouth output high level of CPU；If
Do not have, then it represents that user does not carry out other operations after inserting earphone for the first time, it is believed that it is happy that user is only intended to audition, starts many matchmakers
Body play mode, the enable signal of GPIO mouth output low level.So when Preset Time (such as 2 seconds) reaches, if user inserts
After extract at once and be inserted into (interval of plug twice was less than or equal to 2 seconds the most continuously), then earphone function as wireless charging
Induction coil use, it is achieved wireless charging function.After earphone is extracted, mobile terminal stops wireless charging operation.After insertion
No longer plug then performs multi-media player function.
See also Fig. 4, described handset module 212 include L channel shell fragment L, R channel shell fragment R, the first magnetic bead B1,
Second magnetic bead B2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1 and the second electric capacity C2；Described R channel
Shell fragment R connects one end and the charging module 213 of the first magnetic bead B1, and the other end of the first magnetic bead B1 connects one end of the first resistance R1
With one end of the first electric capacity C1, the other end of the first resistance R1 connects R channel HPRP, the other end ground connection of the first electric capacity C1；Left
Sound channel shell fragment L connects one end and the charging module 213 of the second magnetic bead B2；The other end of the second magnetic bead B2 connects the second resistance R2's
One end, one end of the second electric capacity C2 and one end of the 3rd resistance R3；The other end connection L channel HPLP of the second resistance R2, second
The other end ground connection of electric capacity C2；The other end of the 3rd resistance R3 connects the first power end VDD18_PMU.
When earphone inserts, if starting multimedia pattern, then the audio frequency letter of L channel HPLP, R channel HPRP output
Number by L channel shell fragment L, R channel shell fragment R transmission to earphone play.If starting wireless charging pattern, tone frequency channel wire output electric current
Respectively by L channel shell fragment L, R channel shell fragment R transmission to charging module 213.Be provided with in described charging module 213 left side,
Right charging circuit, the left electric current CH_1 that L channel shell fragment L transmits is converted to left charging current I1, right charged electrical by left charging circuit
The right electric current CH_2 that R channel shell fragment R transmits is converted to right charging current I2 by road.By left charging current I1 and right charging current
Battery is charged by I2 together, then can increase the size of charging current, quick charge.
As a example by this sentences left charging circuit, it includes left-handed opening unit 2131, left voltage regulation unit 2132 to see also Fig. 5
With left control feedback unit 2133.Described left-handed opening unit 2131 controls left electric current CH_1's according to the low and high level enabling signal
Input state, and export the left charging voltage of correspondence.Left voltage regulation unit 2132 obtains left branch pressure voltage to left charging voltage dividing potential drop
V2, and left branch pressure voltage V2 is carried out voltage stabilizing.Left electric current CH_1 is converted to left charging current I1 by left control feedback unit 2133
Battery BT in mobile terminal is charged, the sampled voltage V1 of left charging current I1 and left branch pressure voltage V2 is compared with instead
Feedback regulates the size of left charging current I1.
It is to be appreciated that right charging circuit is identical with the dividing elements of left charging circuit and circuit structure, only need to be by a left side
A left side during the function of charging circuit describes changes the right side into.As: left charging circuit includes right switch element, right voltage regulation unit and the right side
Control feedback unit.Right switch element controls the input state of right electric current according to the low and high level enabling signal, and exports correspondence
Right charging voltage.Right voltage regulation unit obtains right branch pressure voltage to right charging voltage dividing potential drop, and carries out voltage stabilizing to parting piezoelectricity pressure on the right side.
Right electric current is converted to right charging current and charges battery by right control feedback unit, and by the sampled voltage of right charging current with right
Branch pressure voltage compares with the size of the right charging current of feedback regulation.
Described left-handed opening unit 2131 includes the first audion Q1, the 4th resistance R4, the 5th resistance R5 and the 3rd electric capacity C3；
The base stage of described first audion Q1 connects the GPIO mouth of CPU by the 4th resistance R4, also by the 5th resistance R5 ground connection；First
The colelctor electrode of audion Q1 connects L channel shell fragment L；The emitter stage of the first audion Q1 connects one end of the 3rd electric capacity C3, Zuo Wen
Pressure unit 2132 and left control feedback unit 2133；The other end ground connection of the 3rd electric capacity C3.
Wherein, the first audion Q1 is NPN audion.When the enable signal of GPIO mouth output high level, the one or three pole
Left electric current CH_1 is exported by pipe Q1 conducting, obtains left charging voltage by the 3rd electric capacity C3 filtering voltage regulation.
Described left voltage regulation unit 2132 includes source of stable pressure TL, adjustable resistance RP and the 6th resistance R6；Described source of stable pressure TL's
Negative electrode connects one end of the 6th resistance R6, one end of adjustable resistance RP and left control feedback unit 2133, the reference of source of stable pressure TL
End connects the sliding end of adjustable resistance RP, and the anode of source of stable pressure TL connects the other end and ground, the 6th resistance R6 of adjustable resistance RP
The other end connect one end of the 3rd electric capacity C3 and left control feedback unit 2133.
Wherein, the model of source of stable pressure TL is TL431.Left charging voltage dividing potential drop is obtained by adjustable resistance RP and the 6th resistance R6
Left branch pressure voltage V2.Source of stable pressure TL and adjustable resistance RP forms an accurate voltage-stabilizing circuit, to ensure the electricity of left branch pressure voltage V2
Pressure is stable and accurate, using the reference as follow-up comparison.
Described left control feedback unit 2133 includes comparator U, display lamp LED, the second audion Q2, the 3rd audion
Q3, the 4th audion Q4, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9 and the tenth resistance R10；Described second audion
The emitter stage of Q2 connects one end of the 7th resistance R7；The base stage of the second audion Q2 connect the emitter stage of the 3rd audion Q3, the
The colelctor electrode of four audion Q4 and the other end of the 7th resistance R7；The colelctor electrode of the second audion Q2 connect battery BT positive pole and
One end of tenth resistance R10, the base stage of the 3rd audion Q3 connects one end and one end of the 9th resistance R9 of the 8th resistance R8, the
The colelctor electrode of three audion Q3 connects the positive pole of display lamp LED, the minus earth of display lamp LED, the other end of the 8th resistance R8
Connecting the other end and the other end of the 6th resistance R6 of the 7th resistance R7, the other end of the 9th resistance R9 connects the defeated of comparator U
Going out the base stage of end and the 4th audion Q4, the grounded emitter of the 4th audion Q4, the inverting input of comparator U connects the tenth
The other end of resistance R10, the in-phase input end of comparator U connects one end of the 6th resistance R6.
Wherein, the second audion Q2 and the 3rd audion Q3 is PNP triode, and the 4th audion Q4 is NPN audion.Just
Start without left charging current I1, then sampled voltage V1 controls the four or three pole less than left branch pressure voltage V2, comparator U output high level
Pipe Q4 turn on, then the base voltage of the second audion Q2 is pulled low conducting, left charging voltage sequentially pass through the 7th resistance R7 current limliting,
Second audion Q2 exports left charging current I1 and charges battery BT.The electric current of comparator U output makes the 8th resistance R8 and the 9th
Resistance R9 forms a bleeder circuit, and the base voltage of the 3rd audion Q3 turns on, display lamp LED less than emitter voltage
(green glow) is lit, and is currently at charged state with display.
Left charging current I1 sample by the tenth resistance R10 afterwards, it is thus achieved that sampled voltage V1 continue and part piezoelectricity on the left side
Pressure V2 compares.When sampled voltage V1 is more than left branch pressure voltage V2, comparator U output low level controls the 4th audion Q4 and cuts
Stop, thus reduce the conducting state of the second audion Q2 to reduce left charging current I1.When sampled voltage V1 is less than parting piezoelectricity on the left side
During pressure V2, comparator U output high level controls the 4th audion Q4 conducting, thus increase the conducting state of the second audion Q2 with
Increase left charging current I1.So continuous feedback regulation makes left charging current I1 stable.
When not being charged, when i.e. inputting without left electric current CH_1, the output pin of comparator U is by the 8th resistance R8 and the 9th
Resistance R9 pull-up is high impedance status, is also at high impedance, then the 3rd audion Q3 between the 8th resistance R8 and the 9th resistance R9
Cut-off, display lamp LED extinguishes.
In the specific implementation, an electricity also can be set between the base stage of the 4th audion Q4 and the outfan of comparator U
Resistance, to avoid big circuit damage the 4th audion Q4.The colelctor electrode of the 4th audion Q4 and the second audion Q2 base stage it
Between a resistance is set, the second audion Q2 is carried out protection and drop-down.At the in-phase input end of comparator U and the 6th resistance
One resistance is set between one end and carries out current-limiting protection.
Based on above-mentioned wireless charging system, the present invention also provides for a kind of wireless charging method, refers to Fig. 6, described nothing
Line charging method includes:
When S100, the base of wireless charger switch on power, coil electricity in charging column also produces electromagnetic field, charging pile surface
The tone frequency channel wire being wound around senses this electromagnetic field and produces electric current；
S200, the wireless charging device of mobile terminal judge to start multimedia pattern or nothing according to the insert state of earphone
Line charge mode；
S300, when start wireless charging pattern time, wireless charging device the electric current that tone frequency channel wire exports is converted to charging current to
The battery charging of mobile terminal.
Wherein, described step S200 specifically includes:
Step 210, the CPU of wireless charging device have detected whether that earphone inserts: if having, and start intervalometer, perform step 220；
The most then continue detection；
Step 220, before Preset Time reaches, it is judged that earphone whether extract and again insertable into: if having, start wireless charging
Pattern, the enable signal of the GPIO mouth output high level of CPU；If no, then starting multimedia pattern, the output of GPIO mouth is low
The enable signal of level.
Described step S300 specifically includes:
Step 310, when starting wireless charging pattern, wireless charging device controls electric current according to the low and high level enabling signal
Input state, and export the charging voltage of correspondence；
Step 320, charging voltage dividing potential drop is obtained branch pressure voltage, and branch pressure voltage is carried out voltage stabilizing；
Step 330, convert electrical current into charging current and battery is charged, and by the sampled voltage of charging current and branch pressure voltage ratio
Relatively with the size of feedback regulation charging current.
In sum, the present invention arranges a charging column on the base of existing wireless charger, is arranged on base by existing
Interior coil is arranged inside charging column.Utilize the tone frequency channel wire of earphone to replace the induction coil at the mobile terminal back side, and to filling
The circuit of electricity module improves, when judging to start wireless charging pattern according to earphone plug number of times in Preset Time, and will
The electric current of tone frequency channel wire output is converted to charging current and charges to the battery of mobile terminal.Not only save cost, and will not take
Too much space, alleviates structure design difficulty.Solve existing mobile terminal and lead for realizing wireless charging increase induction coil
Cause the problem that hardware cost increases, structure design becomes difficulty.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved according to the above description or to convert, all these modifications and variations all should belong to the guarantor of claims of the present invention
Protect scope.
Claims (10)
1. a wireless charging device for mobile terminal, is connected with earphone, it is characterised in that include CPU, handset module and charging
Module；
Described CPU judges to start multimedia pattern or wireless charging pattern according to the insert state of earphone, and export right
The enable signal answered；The electric current that the tone frequency channel wire of earphone exports, when starting wireless charging pattern, is transferred to charging by handset module
Module；When starting multimedia pattern, audio signal output in left and right is play to earphone；Described charging module is according to enabling letter
Number control described current versus cell charged state.
The wireless charging device of mobile terminal the most according to claim 1, it is characterised in that described charging module includes:
Left-handed opening unit, for controlling the input state of left electric current according to the low and high level enabling signal, and exports a left side for correspondence
Charging voltage；
Left voltage regulation unit, for left charging voltage dividing potential drop is obtained left branch pressure voltage, and carries out voltage stabilizing to parting piezoelectricity pressure on the left side；
Left control feedback unit, charges to battery for left electric current is converted to left charging current, and adopting left charging current
Sample voltage with part piezoelectricity pressure ratio on the left side compared with the size with the left charging current of feedback regulation；
Right switch element, for controlling the input state of right electric current according to the low and high level enabling signal, and exports the right side of correspondence
Charging voltage；
Right voltage regulation unit, for right charging voltage dividing potential drop is obtained right branch pressure voltage, and carries out voltage stabilizing to parting piezoelectricity pressure on the right side；
Right control feedback unit, charges to battery for right electric current is converted to right charging current, and adopting right charging current
Sample voltage with part piezoelectricity pressure ratio on the right side compared with the size with the right charging current of feedback regulation.
The wireless charging device of mobile terminal the most according to claim 2, it is characterised in that described handset module includes a left side
Sound channel shell fragment, R channel shell fragment, the first magnetic bead, the second magnetic bead, the first resistance, the second resistance, the 3rd resistance, the first electric capacity and
Two electric capacity；
Described R channel shell fragment connects one end and the charging module of the first magnetic bead, and the other end of the first magnetic bead connects the first resistance
One end and one end of the first electric capacity, the other end of the first resistance connects R channel, the other end ground connection of the first electric capacity；L channel bullet
Sheet connects one end and the charging module of the second magnetic bead；The other end of the second magnetic bead connects one end of the second resistance, second electric capacity
One end and one end of the 3rd resistance；The other end of the second resistance connects L channel, the other end ground connection of the second electric capacity；3rd resistance
The other end connect the first power end.
The wireless charging device of mobile terminal the most according to claim 3, it is characterised in that described left-handed opening unit includes
First audion, the 4th resistance, the 5th resistance and the 3rd electric capacity；
The base stage of described first audion connects the GPIO mouth of CPU by the 4th resistance, also by the 5th resistance eutral grounding；One or three
The colelctor electrode of pole pipe connects L channel shell fragment；The emitter stage of the first audion connect one end of the 3rd electric capacity, left voltage regulation unit and
Left control feedback unit；The other end ground connection of the 3rd electric capacity.
The wireless charging device of mobile terminal the most according to claim 4, it is characterised in that described left voltage regulation unit includes
Source of stable pressure, adjustable resistance and the 6th resistance;
The negative electrode of described source of stable pressure connects one end of the 6th resistance, one end of adjustable resistance and left control feedback unit, source of stable pressure
Reference edge connect the sliding end of adjustable resistance, the anode of source of stable pressure connects the other end and the ground of adjustable resistance, the 6th resistance
The other end connects one end of the 3rd electric capacity and left control feedback unit.
The wireless charging device of mobile terminal the most according to claim 5, it is characterised in that described left control feedback unit
Including comparator, display lamp, the second audion, the 3rd audion, the 4th audion, the 7th resistance, the 8th resistance, the 9th resistance
With the tenth resistance；
The emitter stage of described second audion connects one end of the 7th resistance；The base stage of the second audion connects the 3rd audion
Emitter stage, the colelctor electrode of the 4th audion and the other end of the 7th resistance；The colelctor electrode of the second audion connects the positive pole of battery
With one end of the tenth resistance, the base stage of the 3rd audion connects one end and one end of the 9th resistance, the three or three pole of the 8th resistance
The colelctor electrode of pipe connects the positive pole of display lamp, the minus earth of display lamp, and the other end of the 8th resistance connects the another of the 7th resistance
One end and the other end of the 6th resistance, the other end of the 9th resistance connects outfan and the base stage of the 4th audion of comparator,
The grounded emitter of the 4th audion, the inverting input of comparator connects the other end of the tenth resistance, and the homophase of comparator is defeated
Enter end and connect one end of the 6th resistance.
7. a wireless charging system, it is characterised in that include wireless charger, mobile terminal and the earphone of band tone frequency channel wire；
It is provided with charging column on the base of described wireless charger, in charging column, is wound with some circle coils；Described mobile terminal
Interior setting described wireless charging device arbitrary just like claim 1-6；Earphone and mobile terminal grafting, tone frequency channel wire is wrapped in and fills
The surface of electricity post；
When base switches on power, coil electricity in charging column also produces electromagnetic field, the tone frequency channel wire sense of charging pile surface wrap
This electromagnetic field should be arrived and produce electric current；This electric current inputs to wireless charging device by earphone；Described wireless charging device according to
The insert state of earphone judges to start multimedia pattern or wireless charging pattern；When starting wireless charging pattern, will
The electric current of tone frequency channel wire output is converted to charging current and charges to the battery of mobile terminal.
8. the wireless charging method of the wireless charging system used described in claim 7, it is characterised in that including:
When step A, the base of wireless charger switch on power, coil electricity in charging column also produces electromagnetic field, charging pile table
The tone frequency channel wire that face is wound around senses this electromagnetic field and produces electric current；
Step B, the wireless charging device of mobile terminal judge to start multimedia pattern still according to the insert state of earphone
Wireless charging pattern；
Step C, when start wireless charging pattern time, wireless charging device the electric current that tone frequency channel wire exports is converted to charging current to
The battery charging of mobile terminal.
Wireless charging method the most according to claim 8, it is characterised in that described step B specifically includes:
Step B1, the CPU of wireless charging device have detected whether that earphone inserts: if having, and start intervalometer, perform step B2；Not yet
Have, continue detection；
Step B2, before Preset Time reaches, it is judged that earphone whether extract and again insertable into: if having, start wireless charging mould
Formula, the enable signal of the GPIO mouth output high level of CPU；If no, then starting multimedia pattern, GPIO mouth exports low electricity
Flat enable signal.
Wireless charging method the most according to claim 8, it is characterised in that described step C specifically includes:
Step C1, when starting wireless charging pattern, wireless charging device controls electric current according to the low and high level enabling signal
Input state, and export the charging voltage of correspondence；
Step C2, charging voltage dividing potential drop is obtained branch pressure voltage, and branch pressure voltage is carried out voltage stabilizing；
Step C3, convert electrical current into charging current and battery is charged, and by the sampled voltage of charging current and branch pressure voltage ratio
Relatively with the size of feedback regulation charging current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610840720.8A CN106329651B (en) | 2016-09-22 | 2016-09-22 | A kind of wireless charging device of mobile terminal, wireless charging system and its method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610840720.8A CN106329651B (en) | 2016-09-22 | 2016-09-22 | A kind of wireless charging device of mobile terminal, wireless charging system and its method |
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| CN106329651A true CN106329651A (en) | 2017-01-11 |
| CN106329651B CN106329651B (en) | 2019-08-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109450035A (en) * | 2018-12-07 | 2019-03-08 | 歌尔科技有限公司 | A kind of self-protection circuit and charging base for charging base |
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| Publication number | Publication date |
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| CN106329651B (en) | 2019-08-20 |
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