CN106329651B - A kind of wireless charging device of mobile terminal, wireless charging system and its method - Google Patents
A kind of wireless charging device of mobile terminal, wireless charging system and its method Download PDFInfo
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- CN106329651B CN106329651B CN201610840720.8A CN201610840720A CN106329651B CN 106329651 B CN106329651 B CN 106329651B CN 201610840720 A CN201610840720 A CN 201610840720A CN 106329651 B CN106329651 B CN 106329651B
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- 238000007600 charging Methods 0.000 title claims abstract description 266
- 238000000034 method Methods 0.000 title claims abstract description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 3
- 239000003990 capacitor Substances 0.000 claims description 30
- 239000011324 bead Substances 0.000 claims description 18
- 230000033228 biological regulation Effects 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 230000009123 feedback regulation Effects 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 230000005236 sound signal Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000005674 electromagnetic induction Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H02J7/025—
-
- 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
-
- 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 kind of wireless charging device of mobile terminal, wireless charging system and its method, wireless charging system includes wireless charger, mobile terminal and the earphone with tone frequency channel wire；Charging column is provided on the pedestal of wireless charger, several circle coils of winding in charging column；Wireless charging device built in mobile terminal；Earphone and mobile terminal grafting, tone frequency channel wire are wrapped in charging column surface；When pedestal powers on, charging column interior loop is powered and generates electromagnetic field, and the tone frequency channel wire on charging pile surface senses the electromagnetic field and generates electric current；The electric current is by earphone input to wireless charging device；Wireless charging device judges starting multimedia mode or wireless charging mode according to the insert state of earphone；When starting wireless charging mode, the electric current that tone frequency channel wire is exported is converted to charging current and charges to the battery of mobile terminal.It replaces the induction coil at the mobile terminal back side to realize wireless charging using tone frequency channel wire, not only saves cost, also reduce structure design difficulty.
Description
Technical field
The present invention relates to charging technique field more particularly to a kind of wireless charging devices of mobile terminal, wireless charging
Electric system and its method.
Background technique
Electromagnetic induction, radio wave, the big principle of magnetic resonance three, mainstream skill can be used in the wireless charging technology of mainstream at present
Art scheme is using electromagnetic induction.The wireless charging mobile phone of market 90% is all based on electromagnetic induction principle, charging effect at present
Rate is high and is easier this to implementing on the higher mobile terminal of volume requirement in mobile phone.Induction wireless charging technology
Principle is to send and receive end one coil of each setting, similar transformer equipment.The coil of transmitting terminal is connected to cable power
Electromagnetic signal is generated, electromagnetic signal is propagated by space.It is produced after the coil-induced electromagnetic signal to transmitting terminal of receiving end
Raw electric current, electric current is using electrical equipment or battery is supplied to after circuit conversion, to realize wireless charging.
Traditional wireless charging device is as shown in Figure 1, very short due to requiring charging distance, to guarantee charge efficiency,
Mobile phone 1 is placed on wireless charging pedestal 2 and need to be placed within the scope of the mark of wireless charging pedestal, to guarantee the receiving coil of mobile phone
It is aligned with the transmitting coil 3 of wireless charging chassis interior, otherwise can reduce charge efficiency.
In order to realize that wireless charging, mobile phone terminal must increase by one group of induction coil (i.e. receiving coil).Charge efficiency is with sense
Answer the group number of coil directly proportional.The hardware cost of mobile phone is inevitably increased in this way, increases structure design difficulty.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of wireless chargings of mobile terminal
Device, wireless charging system and its method, it is intended to solve existing mobile terminal to realize that wireless charging increases induction coil and causing
Hardware cost increases, structure design becomes difficult problem.
The technical proposal for solving the technical problem of the invention is as follows:
A kind of wireless charging device of mobile terminal, connect with earphone comprising CPU, handset module and charging module；
The CPU judges starting multimedia mode or wireless charging mode according to the insert state of earphone, and defeated
Corresponding enable signal out；The electric current that the tone frequency channel wire of earphone exports is transferred to by handset module when starting wireless charging mode
Charging module；When starting multimedia mode, left and right audio signal is exported to earphone and is played；The charging module is according to making
Energy signal controls the charged state of the current versus cell.
In the wireless charging device of the mobile terminal, the charging module includes:
Left-handed opening unit, the input state of left electric current is controlled for the low and high level according to enable signal, and exports correspondence
Left charging voltage；
Left voltage regulation unit for obtaining left branch pressure voltage to left charging voltage partial pressure, and carries out pressure stabilizing to left branch pressure voltage；
Left control feedback unit charges to battery for left electric current to be converted to left charging current, and by left charging current
Sampled voltage compared with left branch pressure voltage with the size of the left charging current of feedback regulation；
Right switch unit, the input state of right electric current is controlled for the low and high level according to enable signal, and exports correspondence
Right charging voltage；
Right voltage regulation unit for obtaining right branch pressure voltage to right charging voltage partial pressure, and carries out pressure stabilizing to right branch pressure voltage；
Right control feedback unit charges to battery for right electric current to be converted to right charging current, and by right charging current
Sampled voltage compared with right branch pressure voltage with the size of the right charging current of feedback regulation.
In the wireless charging device of the mobile terminal, the handset module include L channel elastic slice, right channel elastic slice,
First magnetic bead, the second magnetic bead, first resistor, second resistance, 3rd resistor, first capacitor and the second capacitor；
The right channel elastic slice connects one end and the charging module of the first magnetic bead, the first electricity of other end connection of the first magnetic bead
One end of resistance and one end of first capacitor, the other end of first resistor connect right channel, the other end ground connection of first capacitor；Zuo Sheng
Road elastic slice connects one end and the charging module of the second magnetic bead；One end of the other end connection second resistance of second magnetic bead, the second electricity
One end of appearance and one end of 3rd resistor；The other end of second resistance connects L channel, the other end ground connection of the second capacitor；Third
The other end of resistance connects the first power end.
In the wireless charging device of the mobile terminal, the left-handed opening unit include the first triode, the 4th resistance,
5th resistance and third capacitor；
The base stage of first triode is connected the GPIO mouth of CPU by the 4th resistance, also passes through the 5th resistance eutral grounding；The
The collector of one triode connects L channel elastic slice；One end of the emitter connection third capacitor of first triode, left pressure stabilizing list
First and left control feedback unit；The other end of third capacitor is grounded.
In the wireless charging device of the mobile terminal, the left voltage regulation unit includes source of stable pressure, adjustable resistance and
Six resistance;
The cathode of the source of stable pressure connects one end of the 6th resistance, one end of adjustable resistance and left control feedback unit, surely
The sliding end of the reference end connection adjustable resistance of potential source, the other end and ground of the anode connection adjustable resistance of source of stable pressure, the 6th electricity
One end of the other end connection third capacitor of resistance and left control feedback unit.
In the wireless charging device of the mobile terminal, the left control feedback unit includes comparator, indicator light,
Two triodes, third transistor, the 4th triode, the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance；
The emitter of second triode connects one end of the 7th resistance；The base stage of second triode connects the three or three pole
The other end of the emitter of pipe, the collector of the 4th triode and the 7th resistance；The collector connection battery of second triode
The base stage of one end of anode and the tenth resistance, third transistor connects one end of the 8th resistance and one end of the 9th resistance, third
The anode of the collector connection indicator light of triode, the cathode ground connection of indicator light, the other end of the 8th resistance connect the 7th resistance
The other end and the 6th resistance the other end, the 9th resistance the other end connection comparator output end and the 4th triode base
Pole, the emitter ground connection of the 4th triode, the inverting input terminal of comparator connect the other end of the tenth resistance, the same phase of comparator
Input terminal connects one end of the 6th resistance.
A kind of wireless charging system comprising wireless charger, mobile terminal and the earphone with tone frequency channel wire；
It is provided with charging column on the pedestal of the wireless charger, several circle coils are wound in charging column；The movement
The wireless charging device is provided in terminal；Earphone and mobile terminal grafting, tone frequency channel wire are wrapped in the surface of charging column；
When pedestal powers on, the coil in charging column is powered and generates electromagnetic field, the audio of charging pile surface wrap
Line senses the electromagnetic field and generates electric current；The electric current is by earphone input to wireless charging device；The wireless charging device
Starting multimedia mode or wireless charging mode are judged according to the insert state of earphone；When starting wireless charging mode
When, the electric current that tone frequency channel wire is exported is converted to charging current and charges to the battery of mobile terminal.
A kind of wireless charging method using the wireless charging system comprising:
Step A, when the pedestal of wireless charger powers on, the coil in charging column is powered and generates electromagnetic field, charging
The tone frequency channel wire of stake surface wrap senses the electromagnetic field and generates electric current；
Step B, the wireless charging device of mobile terminal judges starting multimedia mode according to the insert state of earphone
Or wireless charging mode；
Step C, when starting wireless charging mode, the electric current that tone frequency channel wire exports is converted to charging electricity by wireless charging device
It flows to the battery charging of mobile terminal.
In the wireless charging method, the step B is specifically included:
Step B1, the CPU of wireless charging device has detected whether earphone insertion: starting timer if having, executes step
B2；Do not continue to test then；
Step B2, before preset time reaches, judge earphone whether extract and again insertable into: start wireless charging if having
Power mode, the enable signal of the GPIO mouth output high level of CPU；If no, starting multimedia mode, GPIO mouthfuls of outputs
Low level enable signal.
In the wireless charging method, the step C is specifically included:
Step C1, when starting wireless charging mode, wireless charging device controls electricity according to the low and high level of enable signal
The input state of stream, and export corresponding charging voltage；
Step C2, charging voltage is divided and obtains branch pressure voltage, and pressure stabilizing is carried out to branch pressure voltage；
Step C3, it converts electrical current into charging current to charge to battery, and the sampled voltage of charging current and partial pressure is electric
Pressure ratio is compared with the size of feedback regulation charging current.
Compared to the prior art, the wireless charging device of mobile terminal provided by the invention, wireless charging system and its side
Method, wireless charging system include wireless charger, mobile terminal and the earphone with tone frequency channel wire；It is arranged on the pedestal of wireless charger
There is charging column, several circle coils of winding in charging column；Wireless charging device is provided in mobile terminal；Earphone and mobile terminal are inserted
It connects, tone frequency channel wire is wrapped in the surface of charging column；When pedestal powers on, the coil in charging column is powered and generates electromagnetic field,
The tone frequency channel wire of charging pile surface wrap senses the electromagnetic field and generates electric current；The electric current gives wireless charging Denso by earphone input
It sets；The wireless charging device judges starting multimedia mode or wireless charging mode according to the insert state of earphone；
When starting wireless charging mode, the electric current that tone frequency channel wire is exported is converted to charging current and charges to the battery of mobile terminal.Benefit
It replaces the induction coil at the mobile terminal back side to realize wireless charging with earpiece audio line, not only saves cost, and will not account for
With excessive space, structure design difficulty is also reduced.
Detailed description of the invention
Fig. 1 is traditional wireless charging device schematic diagram.
Fig. 2 is the structural block diagram of wireless charging system provided by the invention.
Fig. 3 is the schematic diagram of wireless charging system provided by the invention.
Fig. 4 is the circuit diagram of handset module in wireless charging device provided by the invention.
Fig. 5 is the circuit diagram of charging module in wireless charging device provided by the invention.
Fig. 6 is the wireless charging method flow chart of wireless charging system provided by the invention.
Specific embodiment
The present invention provides wireless charging device, wireless charging system and its method of a kind of mobile terminal, utilizes earphone sound
Frequency line replaces the induction coil at the mobile terminal back side, and improves to the circuit of charging module, not only saves cost, and
Excessive space will not be occupied, structure design difficulty is alleviated.To keep the objectives, technical solutions, and advantages of the present invention more clear
Chu defines, and the present invention is described in more detail as follows in conjunction with drawings and embodiments.It should be appreciated that tool described herein
Body embodiment is only used to explain the present invention, is not intended to limit the present invention.
Please refer to Fig. 2 and Fig. 3, wireless charging system provided by the invention includes wireless charger 10, mobile terminal
20 and the earphone 30 with tone frequency channel wire.It is provided with charging column 120 on the pedestal 110 of the wireless charger 10, is twined in charging column 120
Around N circle coil.Wireless charging device 210 is provided in the mobile terminal 20.Earphone 30 is inserted into mobile terminal 20, and
Tone frequency channel wire is wrapped in the surface of charging column 120.A charging column is arranged in the present embodiment on the pedestal of existing wireless charger, will
Inside existing coil (as shown in Fig. 1 circle of dotted line) setting to charging column 120 being arranged in pedestal.It is twined using the tone frequency channel wire of earphone
The induction coil at the mobile terminal back side is replaced around 120 surface of charging column.Tone frequency channel wire can be headphone, ear type ear
The tone frequency channel wire of machine, microphone.
The alternating current of 220V is converted into 5V direct current after pedestal 110 plugs in, the coil in charging column 120 is powered
(voltage for stablizing load 12V), and galvanomagnetic-effect is generated, an electromagnetic field is generated outward.According to electromagnetic induction principle, charging pile
The tone frequency channel wire of 120 surface wraps constitutes coil, can sense the electromagnetic field and generate electric current.The electric current is defeated by earphone interface
Enter to wireless charging device 210.The wireless charging device 210 judges starting multimedia according to the insert state of earphone 30
Mode or wireless charging mode；When starting wireless charging mode, the electric current that the tone frequency channel wire of earphone 30 exports is converted to and is filled
Electric current charges to the battery of mobile terminal 20, to realize wireless charging function.When starting multimedia mode, execute
Existing earphone playing function.
In the present embodiment, the wireless charging device 210 includes CPU 211, handset module 212 and charging module 213.Institute
It states CPU 211 and starting multimedia mode or wireless charging mode, and output pair is judged according to the insert state of earphone 30
The enable signal answered.The handset module 212 is transferred to charging when starting wireless charging mode, by the electric current that tone frequency channel wire exports
Module 213；When starting multimedia mode, left and right audio signal is exported to earphone and is played.213 basis of charging module
Enable signal controls the charged state of the current versus cell: if enable signal is charges when high level, tone frequency channel wire is defeated
Electric current out is converted to charging current and charges the battery；If enable signal is low level, stop charging.
In order to judge that user is desirable to listen to music or carry out wireless charging by insertion earphone, the present embodiment is according to ear
The plug number of machine within a preset time carries out judging which kind of function it executes.Specifically include: CPU has first detected whether earphone
Insertion, starts timer if having, does not continue to test.Then before preset time reaches, judge whether earphone is extracted
And again insertable into: think that if having, user is intended to carry out wireless charging, GPIO mouth of CPU exports the enable signal of high level；If
Do not have, then it represents that user, which is inserted into for the first time after earphone, does not carry out other operations, it is believed that user is only intended to listen to music, and starts more matchmakers
Body play mode, the GPIO mouthfuls of low level enable signals of output.In this way when preset time (such as 2 seconds) reaches, if user is inserted into
It extracts at once afterwards and is inserted into (interval of i.e. continuous plug twice is less than or equal to 2 seconds), then earphone functions as wireless charging
Induction coil use, realize wireless charging function.After earphone is extracted, mobile terminal stops wireless charging operation.After insertion
No longer plug then executes multi-media player function.
Referring to Figure 4 together, the handset module 212 include L channel elastic slice L, right channel elastic slice R, the first magnetic bead B1,
Second magnetic bead B2, first resistor R1, second resistance R2,3rd resistor R3, first capacitor C1 and the second capacitor C2；The right channel
One end of elastic slice R the first magnetic bead of connection B1 and charging module 213, one end of the other end connection first resistor R1 of the first magnetic bead B1
With one end of first capacitor C1, the other end of first resistor R1 connects right channel HPRP, the other end ground connection of first capacitor C1；It is left
One end of sound channel elastic slice L the second magnetic bead of connection B2 and charging module 213；The other end connection second resistance R2's of second magnetic bead B2
One end, one end of the second capacitor C2 and 3rd resistor R3 one end；The other end of second resistance R2 connects L channel HPLP, and second
The other end of capacitor C2 is grounded；The other end of 3rd resistor R3 connects the first power end VDD18_PMU.
When earphone insertion, if starting multimedia mode, the audio letter of L channel HPLP, right channel HPRP output
Number by L channel elastic slice L, right channel elastic slice R be transmitted to earphone play.If starting wireless charging mode, tone frequency channel wire exports electric current
It is transmitted in charging module 213 by L channel elastic slice L, right channel elastic slice R respectively.Be provided in the charging module 213 it is left,
Right charging circuit, the left electric current CH_1 that left charging circuit transmits L channel elastic slice L are converted to left charging current I1, right charging electricity
The right electric current CH_2 that right channel elastic slice R is transmitted on road is converted to right charging current I2.By left charging current I1 and right charging current
I2 together charges to battery, then can increase the size of charging current, quick charge.
For this sentences left charging circuit, also referring to Fig. 5, it includes left-handed opening unit 2131, left voltage regulation unit 2132
With left control feedback unit 2133.The left-handed opening unit 2131 controls left electric current CH_1's according to the low and high level of enable signal
Input state, and export corresponding left charging voltage.The left charging voltage partial pressure of 2132 pairs of left voltage regulation unit obtains left branch pressure voltage
V2, and pressure stabilizing is carried out to left branch pressure voltage V2.Left electric current CH_1 is converted to left charging current I1 by left control feedback unit 2133
To the battery BT charging in mobile terminal, the sampled voltage V1 of left charging current I1 is compared with left branch pressure voltage V2 with anti-
Feedback adjusts the size of left charging current I1.
It, only need to will be left it is to be appreciated that right charging circuit is identical as the dividing elements of left charging circuit and circuit structure
A left side in the function description of charging circuit changes the right side into.Such as: left charging circuit includes right switch unit, right voltage regulation unit and the right side
Control feedback unit.Right switch unit controls the input state of right electric current according to the low and high level of enable signal, and exports correspondence
Right charging voltage.Right voltage regulation unit obtains right branch pressure voltage to right charging voltage partial pressure, and carries out pressure stabilizing to right branch pressure voltage.
Right electric current is converted to right charging current and charged to battery by right control feedback unit, and by the sampled voltage of right charging current and right
Branch pressure voltage compares with the size of the right charging current of feedback regulation.
The left-handed opening unit 2131 includes the first triode Q1, the 4th resistance R4, the 5th resistance R5 and third capacitor C3；
The base stage of the first triode Q1 is grounded by the GPIO mouth of the 4th resistance R4 connection CPU, also by the 5th resistance R5；First
The collector of triode Q1 connects L channel elastic slice L；One end of the emitter connection third capacitor C3 of first triode Q1, Zuo Wen
Press unit 2132 and left control feedback unit 2133；The other end of third capacitor C3 is grounded.
Wherein, the first triode Q1 is NPN triode.When the GPIO mouthfuls of enable signals for exporting high level, the one or three pole
Pipe Q1 conducting exports left electric current CH_1, obtains left charging voltage by third capacitor C3 filtering voltage regulation.
The left voltage regulation unit 2132 includes source of stable pressure TL, adjustable resistance RP and the 6th resistance R6；The source of stable pressure TL's
Cathode 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
The sliding end of end connection adjustable resistance RP, the other end and ground of the anode connection adjustable resistance RP of source of stable pressure TL, the 6th resistance R6
The other end connection third capacitor C3 one end and left control feedback unit 2133.
Wherein, the model TL431 of source of stable pressure TL.Adjustable resistance RP and the 6th resistance R6 divides left charging voltage and obtains
Left branch pressure voltage V2.Source of stable pressure TL and adjustable resistance RP forms an accurate voltage-stabilizing circuit, to guarantee the electricity of left branch pressure voltage V2
Pressure is stable and accurate, using the reference as subsequent comparison.
The left control feedback unit 2133 includes comparator U, indicator light LED, the second triode Q2, third transistor
Q3, the 4th triode Q4, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9 and the tenth resistance R10；Second triode
The emitter of Q2 connects one end of the 7th resistance R7；The emitter of the base stage connection third transistor Q3 of second triode Q2, the
The collector of four triode Q4 and the other end of the 7th resistance R7；Second triode Q2 collector connection battery BT anode and
One end of tenth resistance R10, the base stage of third transistor Q3 connect one end of the 8th resistance R8 and one end of the 9th resistance R9, the
The anode of the collector connection indicator light LED of three triode Q3, the cathode ground connection of indicator light LED, the other end of the 8th resistance R8
The other end of the 7th resistance R7 and the other end of the 6th resistance R6 are connected, the other end connection comparator U's of the 9th resistance R9 is defeated
The base stage of outlet and the 4th triode Q4, the emitter ground connection of the 4th triode Q4, the inverting input terminal connection the tenth of comparator U
The other end of resistance R10, the non-inverting input terminal of comparator U connect one end of the 6th resistance R6.
Wherein, the second triode Q2 and third transistor Q3 is PNP triode, and the 4th triode Q4 is NPN triode.Just
Start without left charging current I1, then sampled voltage V1 is less than left branch pressure voltage V2, and comparator U exports high level and controls the four or three pole
Pipe Q4 conducting, then the base voltage of the second triode Q2 is pulled low conducting, left charging voltage successively pass through the 7th resistance R7 current limliting,
Second triode Q2 exports left charging current I1 and charges to 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 third transistor Q3 is less than emitter voltage and is connected, indicator light LED
(green light) is lit, and is currently at charged state with display.
Left charging current I1 is sampled by the tenth resistance R10 later, the sampled voltage V1 of acquisition continues and left partial pressure electricity
Pressure V2 compares.When sampled voltage V1 is greater than left branch pressure voltage V2, comparator U exports the 4th triode Q4 of low level control and cuts
Only, to reduce the on state of the second triode Q2 to reduce left charging current I1.When sampled voltage V1 is less than left partial pressure electricity
Press V2 when, comparator U export high level control the 4th triode Q4 conducting, thus increase the second triode Q2 on state with
Increase left charging current I1.Feedback regulation continuous in this way stablizes left charging current I1.
When without charging, i.e., when 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, high impedance is also between the 8th resistance R8 and the 9th resistance R9, then third transistor Q3
Cut-off, indicator light LED extinguish.
In the specific implementation, an electricity can be also set between the base stage of the 4th triode Q4 and the output end of comparator U
Resistance damages the 4th triode Q4 to avoid high current.The 4th triode Q4 collector and the second triode Q2 base stage it
Between be arranged a resistance, the second triode Q2 is protected and is pulled down.In the non-inverting input terminal and the 6th resistance of comparator U
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 a kind of wireless charging methods, referring to Fig. 6, the nothing
Line charge method for electrically includes:
Pedestal when powering on of S100, wireless charger, the coil in charging column is powered and generates electromagnetic field, charging pile
The tone frequency channel wire of surface wrap senses the electromagnetic field and generates electric current；
S200, mobile terminal wireless charging device according to the insert state of earphone judge starting multimedia mode also
It is wireless charging mode；
S300, when starting wireless charging mode, wireless charging device by the electric current that tone frequency channel wire exports be converted to charging electricity
It flows to the battery charging of mobile terminal.
Wherein, the step S200 is specifically included:
Step 210, wireless charging device CPU detected whether earphone insertion: start timer if having, execute step
220；Do not continue to test then；
Step 220, before preset time reaches, judge earphone whether extract and again insertable into: start if having wireless
Charge mode, the enable signal of the GPIO mouth output high level of CPU；If no, starting multimedia mode, GPIO mouthfuls defeated
Low level enable signal out.
The step S300 is specifically included:
Step 310, when starting wireless charging mode, wireless charging device according to the low and high level of enable signal control electricity
The input state of stream, and export corresponding charging voltage；
Step 320 divides acquisition branch pressure voltage to charging voltage, and carries out pressure stabilizing to branch pressure voltage；
Step 330 converts electrical current into charging current to battery charging, and the sampled voltage of charging current and partial pressure is electric
Pressure ratio is compared with the size of feedback regulation charging current.
In conclusion a charging column is arranged in the present invention on the pedestal of existing wireless charger, it is arranged existing in pedestal
Inside interior coil setting to charging column.Replace the induction coil at the mobile terminal back side using the tone frequency channel wire of earphone, and to filling
The circuit of electric module improves, will when starting wireless charging mode according to the plug number judgement of earphone within a preset time
The electric current that tone frequency channel wire exports is converted to charging current and charges to the battery of mobile terminal.Cost is not only saved, and will not be occupied
Excessive space alleviates structure design difficulty.Existing mobile terminal is solved to realize that wireless charging increases induction coil and leading
Hardware cost is caused to increase, structure design becomes difficult problem.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of wireless charging device of mobile terminal, connect with earphone, which is characterized in that including CPU, handset module and charging
Module；
The CPU judges starting multimedia mode or wireless charging mode, and output pair according to the insert state of earphone
The enable signal answered；Handset module is transferred to charging when starting wireless charging mode, by the electric current that the tone frequency channel wire of earphone exports
Module；When starting multimedia mode, left and right audio signal is exported to earphone and is played；The charging module is according to enabled letter
The charged state of number control current versus cell；
CPU has first detected whether earphone insertion, starts timer if having, does not continue to test；Reach it in preset time
Before, judge earphone whether extract and again insertable into: think if having to carry out wireless charging, GPIO mouth of CPU exports high level
Enable signal；If no, starting multimedia mode, the GPIO mouthfuls of low level enable signals of output.
2. the wireless charging device of mobile terminal according to claim 1, which is characterized in that the charging module includes:
Left-handed opening unit, the input state of left electric current is controlled for the low and high level according to enable signal, and exports a corresponding left side
Charging voltage；
Left voltage regulation unit for obtaining left branch pressure voltage to left charging voltage partial pressure, and carries out pressure stabilizing to left branch pressure voltage；
Left control feedback unit charges to battery for left electric current to be converted to left charging current, and adopting left charging current
Sample voltage is compared with left branch pressure voltage with the size of the left charging current of feedback regulation；
Right switch unit, the input state of right electric current is controlled for the low and high level according to enable signal, and exports the corresponding right side
Charging voltage；
Right voltage regulation unit for obtaining right branch pressure voltage to right charging voltage partial pressure, and carries out pressure stabilizing to right branch pressure voltage；
Right control feedback unit charges to battery for right electric current to be converted to right charging current, and adopting right charging current
Sample voltage is compared with right branch pressure voltage with the size of the right charging current of feedback regulation.
3. the wireless charging device of mobile terminal according to claim 2, which is characterized in that the handset module includes a left side
Sound channel elastic slice, right channel elastic slice, the first magnetic bead, the second magnetic bead, first resistor, second resistance, 3rd resistor, first capacitor and
Two capacitors；
The right channel elastic slice connects one end and the charging module of the first magnetic bead, the other end connection first resistor of the first magnetic bead
One end of one end and first capacitor, the other end of first resistor connect right channel, the other end ground connection of first capacitor；L channel bullet
Piece connects one end and the charging module of the second magnetic bead；Other end connection one end of second resistance of second magnetic bead, the second capacitor
One end of one end and 3rd resistor；The other end of second resistance connects L channel, the other end ground connection of the second capacitor；3rd resistor
The other end connect the first power end.
4. the wireless charging device of mobile terminal according to claim 3, which is characterized in that the left-handed opening unit includes
First triode, the 4th resistance, the 5th resistance and third capacitor；
The base stage of first triode is connected the GPIO mouth of CPU by the 4th resistance, also passes through the 5th resistance eutral grounding；One or three
The collector of pole pipe connects L channel elastic slice；Emitter connection one end of third capacitor of first triode, left voltage regulation unit and
Left control feedback unit；The other end of third capacitor is grounded.
5. the wireless charging device of mobile terminal according to claim 4, which is characterized in that the left voltage regulation unit includes
Source of stable pressure, adjustable resistance and the 6th resistance;
The cathode of the 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 end connection adjustable resistance sliding end, source of stable pressure anode connection adjustable resistance the other end and ground, the 6th resistance
One end of other end connection third capacitor and left control feedback unit.
6. the wireless charging device of mobile terminal according to claim 5, which is characterized in that the left control feedback unit
Including comparator, indicator light, the second triode, third transistor, the 4th triode, the 7th resistance, the 8th resistance, the 9th resistance
With the tenth resistance；
The emitter of second triode connects one end of the 7th resistance；The base stage connection third transistor of second triode
The other end of emitter, the collector of the 4th triode and the 7th resistance；The anode of the collector connection battery of second triode
One end of the 8th resistance and one end of the 9th resistance, the three or three pole are connected with the base stage of one end of the tenth resistance, third transistor
The anode of the collector connection indicator light of pipe, the cathode ground connection of indicator light, the other end of the 8th resistance connect the another of the 7th resistance
The other end of one end and the 6th resistance, the output end of the other end connection comparator of the 9th resistance and the base stage of the 4th triode,
The emitter of 4th triode is grounded, and the inverting input terminal of comparator connects the other end of the tenth resistance, comparator it is same mutually defeated
Enter one end of the 6th resistance of end connection.
7. a kind of wireless charging system, which is characterized in that including wireless charger, mobile terminal and with the earphone of tone frequency channel wire；
It is provided with charging column on the pedestal of the wireless charger, several circle coils are wound in charging column；The mobile terminal
The interior setting wireless charging device any just like claim 1-6；Earphone and mobile terminal grafting, tone frequency channel wire, which is wrapped in, to be filled
The surface of electric column；
When pedestal powers on, the coil in charging column is powered and generates electromagnetic field, the tone frequency channel wire sense of charging pile surface wrap
The electromagnetic field should be arrived and generate electric current；The electric current is by earphone input to wireless charging device；The wireless charging device according to
The insert state judgement starting multimedia mode or wireless charging mode of earphone；It, will when starting wireless charging mode
The electric current that tone frequency channel wire exports is converted to charging current and charges to the battery of mobile terminal.
8. a kind of wireless charging method using wireless charging system as claimed in claim 7 characterized by comprising
Step A, when the pedestal of wireless charger powers on, the coil in charging column is powered and generates electromagnetic field, charging pile table
The tone frequency channel wire of face winding senses the electromagnetic field and generates electric current；
Step B, the wireless charging device of mobile terminal judges starting multimedia mode still according to the insert state of earphone
Wireless charging mode；
Step C, when starting wireless charging mode, the electric current that wireless charging device exports tone frequency channel wire be converted to charging current to
The battery of mobile terminal charges.
9. wireless charging method according to claim 8, which is characterized in that the step B is specifically included:
Step B1, the CPU of wireless charging device has detected whether earphone insertion: starting timer if having, executes step B2；Not yet
Have, continues to test；
Step B2, before preset time reaches, judge earphone whether extract and again insertable into: start wireless charging mould if having
Formula, the enable signal of the GPIO mouth output high level of CPU；If no, starting multimedia mode, the low electricity of GPIO mouthfuls of outputs
Flat enable signal.
10. wireless charging method according to claim 8, which is characterized in that the step C is specifically included:
Step C1, when starting wireless charging mode, wireless charging device controls electric current according to the low and high level of enable signal
Input state, and export corresponding charging voltage；
Step C2, charging voltage is divided and obtains branch pressure voltage, and pressure stabilizing is carried out to branch pressure voltage；
Step C3, it converts electrical current into charging current to charge to battery, and by the sampled voltage of charging current and branch pressure voltage ratio
Compared 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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| 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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| CN109450035B (en) * | 2018-12-07 | 2024-01-26 | 歌尔科技有限公司 | Self-protection circuit for charging base and charging base |
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|---|---|---|---|---|
| CN102457090A (en) * | 2010-10-14 | 2012-05-16 | 朱斯忠 | Induction charging device |
| CN103188594A (en) * | 2011-12-28 | 2013-07-03 | 比亚迪股份有限公司 | Detection circuit and detection method for earphone |
| CN104218625A (en) * | 2013-05-31 | 2014-12-17 | 中兴通讯股份有限公司 | Wireless charging method and device of hand-held mobile terminal |
| CN104469615A (en) * | 2014-12-15 | 2015-03-25 | 上海华勤通讯技术有限公司 | Terminal device and earphone circuit thereof |
| CN104869512A (en) * | 2015-05-28 | 2015-08-26 | 盛耀无线通讯科技（北京）有限公司 | Earphone plugging noise suppression circuit |
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2016
- 2016-09-22 CN CN201610840720.8A patent/CN106329651B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457090A (en) * | 2010-10-14 | 2012-05-16 | 朱斯忠 | Induction charging device |
| CN103188594A (en) * | 2011-12-28 | 2013-07-03 | 比亚迪股份有限公司 | Detection circuit and detection method for earphone |
| CN104218625A (en) * | 2013-05-31 | 2014-12-17 | 中兴通讯股份有限公司 | Wireless charging method and device of hand-held mobile terminal |
| CN104469615A (en) * | 2014-12-15 | 2015-03-25 | 上海华勤通讯技术有限公司 | Terminal device and earphone circuit thereof |
| CN104869512A (en) * | 2015-05-28 | 2015-08-26 | 盛耀无线通讯科技（北京）有限公司 | Earphone plugging noise suppression circuit |
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