CN107732999A - A kind of charging method, charging system and electronic equipment - Google Patents
A kind of charging method, charging system and electronic equipment Download PDFInfo
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- CN107732999A CN107732999A CN201710759328.5A CN201710759328A CN107732999A CN 107732999 A CN107732999 A CN 107732999A CN 201710759328 A CN201710759328 A CN 201710759328A CN 107732999 A CN107732999 A CN 107732999A
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- 238000007600 charging Methods 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000005611 electricity Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
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Classifications
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- H02J7/0077—
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
-
- H02J2007/10—
-
- 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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of charging method, charging system and electronic equipment.This method is applied to charging system, and the charging system includes charger, data wire and electronic equipment, and this method includes：When charger is charged by data wire to electronic equipment, charger detects that the voltage of electronic equipment and data wire junction is first voltage；Charger obtains first voltage and the first difference of preset voltage value；Charger adjusts first voltage according to the first difference, so that the first voltage after adjustment is equal to preset voltage value.In this way, it is possible to increase the charge efficiency of electronic equipment.
Description
Technical field
The present invention relates to charging technique field, more particularly to a kind of charging method, charging system and electronic equipment.
Background technology
With being continuously increased for powder consumption of electronic equipment, battery capacity also continuous increase, be quick charge, it is desirable to charge
Electric current is increasing, and the increase of charging current can cause the voltage increase consumed on charge path, so as to cause actual fill
Piezoelectric voltage diminishes, and causes the time elongated, and charge efficiency reduces.
The present inventor has found in long-term research and development,, can be with to improve charge efficiency in currently available technology
By the feedback of the output voltage at charger end, to control charging voltage, the test point of output voltage is generally arranged on charging
Output port on device.This setup is not high to the control accuracy of charging voltage, so as to effectively improve charge efficiency.
The content of the invention
The present invention solves the technical problem of a kind of charging method, charging system and electronic equipment is provided, to improve
The charge efficiency of electronic equipment.
In order to solve the above technical problems, one aspect of the present invention is：A kind of charging method is provided.It is described to fill
Method for electrically is applied to charging system, and the charging system includes charger, data wire and electronic equipment, and methods described includes：
The charger by the data wire to the electronic equipment charge when, the charger detects the electronic equipment and institute
The voltage for stating data wire junction is first voltage；The charger obtains the first voltage and the first of preset voltage value poor
Value；The charger adjusts the first voltage according to first difference, so that the first voltage after adjustment is equal to described pre-
If magnitude of voltage.
Wherein, methods described further comprises：In the charger output voltage, the charger detects described fill
The voltage of the output end of electrical equipment is second voltage；The charger obtains the second of the second voltage and the preset voltage value
Difference；The charger adjusts the second voltage according to second difference, so that the second voltage after adjustment is equal to described
Preset voltage value.
In order to solve the above technical problems, another technical solution used in the present invention is：A kind of charging system is provided.It is described
Charging system includes charger, data wire and electronic equipment, and the electronic equipment is connected by the data wire and the charger
Connect, the charger includes processor, the first feedback circuit and charging circuit, and the processor feeds back with described first respectively
Circuit and charging circuit coupling, the electronic equipment include the second feedback circuit, wherein：Pass through in the charger described
Data wire to the electronic equipment charge when, first feedback circuit is connected with second feedback circuit by the data wire
Connect, the processor detects the electronic equipment and the number by first feedback circuit and second feedback circuit
Voltage according to line junction is first voltage；The processor obtains the first voltage and the first difference of preset voltage value；
The processor adjusts the first voltage according to first difference by the charging circuit, so that the first electricity after adjustment
Pressure is equal to the preset voltage value.
Wherein, in the charger output voltage, first feedback circuit disconnects with second feedback circuit to be connected
Connect, the processor detects that the voltage of the output end of the charger is second voltage by first feedback circuit；Institute
State processor and obtain the second voltage and the second difference of the preset voltage value；The processor is according to second difference
The second voltage is adjusted by the charging circuit, so that the second voltage after adjustment is equal to the preset voltage value.
Wherein, first feedback circuit includes first resistor and second resistance, one end connection institute of the first resistor
State the VBUS ends of data wire, the other end of the first resistor connects the ID ends of the data wire and the processor, and described the
One end of two resistance connects the ID ends of the data wire, and the other end of the second resistance connects the GND ends of the data wire.
Wherein, second feedback circuit includes 3rd resistor and the 4th resistance, one end connection institute of the 3rd resistor
The VBUS ends of data wire are stated, the other end of the 3rd resistor connects the ID ends of the data wire, one end of the 4th resistance
The ID ends of the data wire are connected, the other end connects the GND ends of the data wire.
Wherein, the first resistor, the second resistance, the 3rd resistor and the 4th resistor satisfied condition：
(VIN+IC*R0-VFB)/R1-VFB/R2+ (VIN-VFB)/R3=VFB/R4；Wherein, the VIN is the first voltage, institute
State charging currents of the IC for the charger to the electronic equipment, the feedback voltage that the VFB receives for the processor, institute
It is that first feedback circuit and second feedback circuit produce according to the first voltage to state feedback voltage, the R1, institute
It is respectively the first resistor, the second resistance, the 3rd resistor and the 4th electricity to state R2, the R3 and the R4
Resistance, the R0 are equivalent resistance of the charger to the electronic equipment and data wire junction resistance.
Wherein, the system further comprises first switch, and the first switch is respectively with the processor and described filling
Circuit is coupled, and the first switch is controlled under the control of the output signal of the processor described in the charging circuit adjustment
First voltage, the output signal produce according to first difference；Wherein, the charging circuit further comprise diode,
Electric capacity and the 5th resistance；The electric capacity and the 5th resistant series, the electric capacity and the circuit after the 5th resistant series,
The first switch and the diode three are parallel with one another, form parallel circuit.
Wherein, the system further comprises second switch, and the charging circuit further comprises transformer, described second
Switch couples with the processor and the transformer respectively, and the transformer couples with the parallel circuit, the processor
The output voltage of the transformer is controlled by the second switch, to adjust the defeated of the parallel circuit of the charging circuit
Enter voltage.
In order to solve the above technical problems, another technical scheme that the present invention uses is：A kind of electronic equipment is provided.It is described
Electronic equipment is above-mentioned electronic equipment.
The beneficial effect of the embodiment of the present invention is：Prior art is different from, charging method of the present invention passes through number in charger
According to line to electronic equipment charge when, charger detects that the voltage of electronic equipment and data wire junction is first voltage；Charging
Device obtains first voltage and the first difference of preset voltage value；Charger adjusts first voltage according to the first difference, so that adjustment
First voltage afterwards is equal to preset voltage value.In this way, electronic equipment and the first electricity of data wire junction can be made
Pressure is maintained at preset voltage value, and can improve causes the actual charging voltage of electronic equipment to reduce because of voltage consumption on charge path
The problem of, so as to improve the charge efficiency of electronic equipment.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the embodiment of charging method one of the present invention；
Fig. 2 is Fig. 1 embodiment electronic equipment charging characteristic curve figures；
Fig. 3 is the schematic flow sheet of another embodiment of charging method of the present invention；
Fig. 4 is the structural representation that Charging of the present invention unifies embodiment；
Fig. 5 is the circuit diagram of Fig. 4 embodiment charging systems；
Fig. 6 is the first feedback circuit of Fig. 5 embodiments and the second feedback circuit connected by data wire after equivalent circuit；
Fig. 7 is the structural representation of another embodiment of charging system of the present invention；
Fig. 8 is the circuit diagram of the embodiment of electronic equipment one of the present invention.
Embodiment
Referring to Fig. 1, Fig. 1 is the schematic flow sheet of the embodiment of charging method one of the present invention.The present embodiment charging method should
For charging system, charging system includes charger, data wire and electronic equipment, data wire connection charger and electronic equipment,
Charger passes through data wire electron equipment charge.This method specifically includes following steps：
S101：When charger is charged by data wire to electronic equipment, charger detects electronic equipment and data wire
The voltage of junction is first voltage.
Referring to Fig. 2, Fig. 2 is Fig. 1 embodiment electronic equipment charging characteristic curve figures, from figure 2 it can be seen that electronics is set
Standby charging process is divided into three phases：Pre-charging stage, constant-current charging phase and constant voltage charging phase, wherein, filled in constant current
In the electric stage, charging voltage increase ratio is very fast, and charging current keeps constant, after charging voltage reaches maximum, is filled into constant pressure
In the electric stage, charging current declines, until leveling off to zero.With on electronic equipment, battery capacity is continuously increased, it is desirable to charger
The charging voltage increase provided electronic equipment, to meet the requirement of quick charge, but the increase meeting of the charging voltage of charger
Increase the charging current on whole charge path, so as to cause the device or circuit on charge path, such as charger interface,
Data wire etc., the voltage increase of consumption, and then cause the actual charging voltage of electronic equipment to reduce (the actual charging of the present embodiment
Voltage refers to the charging voltage that electronic equipment charging control circuit is received), the charging control circuit in electronic equipment can be automatic
Adjust charging current to reduce, to terminate constant-current charge, the constant-current charge time shortens, and causes electronic equipment undercharge, during charging
Between it is elongated, charge efficiency reduce.
For example, table 1 is the data of an actual test, it can be seen that to come from the data of table 1, cell voltage is left in 3.9V
The right side, charging current is 1.8A or so, and when cell voltage rises to 4.1V, charging current only has 1.5A or so, and the charging interval
Also it is obvious elongated.
The charger voltage of table 1, cell voltage, charging current and charging interval corresponding table
| Charger voltage | Cell voltage | Charging current | Time |
| 5.151196 | 3.87102103 | 1.7513983 | 16：36 |
| 5.15492296 | 3.87505245 | 1.75122302 | 16：37 |
| 5.15741539 | 3.87876582 | 1.75040495 | 16：38 |
| 5.15735292 | 3.8829329 | 1.74887665 | 16：39 |
| 5.15906096 | 3.88722038 | 1.74648277 | 16：40 |
| 5.16072559 | 3.90535831 | 1.66561417 | 16：45 |
| 5.16159439 | 3.92872715 | 1.65396165 | 16：50 |
| 5.16401768 | 3.95132995 | 1.64843109 | 16：55 |
| 5.16761827 | 3.96642184 | 1.68460924 | 17：00 |
| 5.16854668 | 3.976089 | 1.63827725 | 17：05 |
| 5.16943455 | 3.98471904 | 1.6279703 | 17：10 |
| 5.16965008 | 3.99463415 | 1.62560456 | 17：15 |
| 5.16953945 | 4.00525618 | 1.61864385 | 17：20 |
| 5.16995144 | 4.01784658 | 1.62115246 | 17：25 |
| 5.16994095 | 4.03301144 | 1.60160773 | 17：30 |
| 5.16974878 | 4.04926014 | 1.58420838 | 17：35 |
| 5.17166138 | 4.06535292 | 1.56198982 | 17：40 |
| 5.17521191 | 4.08676386 | 1.54300667 | 17：45 |
| 5.17520189 | 4.10827494 | 1.51976533 | 17：50 |
| 5.17488003 | 4.13141775 | 1.49386404 | 17：55 |
| 5.17473364 | 4.15635633 | 1.46224368 | 18：00 |
S102：Charger obtains first voltage and the first difference of preset voltage value.
The preset voltage value of the present embodiment can be set according to the charging interval of electronic equipment, the capacity of battery etc., example
Preset voltage value can be such as arranged to 4.75V-5.25V or other magnitudes of voltage.
S103：Charger adjusts first voltage according to the first difference, so that the first voltage after adjustment is equal to predeterminated voltage
Value.The first voltage of the adjustment of the present embodiment is the voltage of data wire and electronic equipment junction, and first voltage can be more direct
Reaction electronic equipment charging voltage, without regard to the voltage consumed on the charge paths such as charger and data wire, energy
Enough charging voltages for more directly, accurately adjusting electronic equipment.
The processor of the present embodiment can be adjusted by pulsewidth modulation (Pulse Width Modulation, PWM) technology
Whole first voltage is preset voltage value.PWM is a kind of to the digitally coded method of analog signal level progress.Pass through high-resolution
The use of counter, the dutycycle of square wave are modulated for being encoded to the level of a physical simulation signal.Certainly, at it
In its embodiment, the modulation techniques such as amplitude shift, frequency shift keying and phase-shift keying (PSK) can also be used to replace PWM.
Prior art is different from, the present embodiment charging method is filled when charger is charged by data wire to electronic equipment
Electrical Testing to electronic equipment and the voltage of data wire junction be first voltage；Charger obtains first voltage and predeterminated voltage
First difference of value；Charger adjusts first voltage according to the first difference, so that the first voltage after adjustment is equal to predeterminated voltage
Value.In this way, the first voltage of electronic equipment and data wire junction can be made to be maintained at preset voltage value, Neng Gougai
Kind the problem of causing the actual charging voltage of electronic equipment to reduce because of voltage consumption on charge path, set so as to improve electronics
Standby charge efficiency.
The present invention further provides the charging method of another embodiment, the charging method disclosed in the present embodiment is in above-mentioned reality
Apply and be described on the basis of the charging method of example.Referring to Fig. 3, Fig. 3 is the flow of another embodiment of charging method of the present invention
Schematic diagram.The present embodiment charging modes are to carry out charging voltage control for charger end, to avoid the voltage at charger end different
Often.The present embodiment charging method specifically includes following methods：
S301：In charger output voltage, charger detects that the voltage of the output end of charger is second voltage.
S302：Charger obtains second voltage and the second difference of preset voltage value.
The preset voltage value of the present embodiment can be set according to the charging interval of electronic equipment, the capacity of battery etc..
S303：Charger adjusts second voltage according to the second difference, so that the second voltage after adjustment is equal to predeterminated voltage
Value.
The present embodiment charging method remains it default by detecting, adjusting the second voltage of the output end of charger
Magnitude of voltage, it is capable of the output voltage of constant charge device, improves charge stability and charging accuracy.
Referring to Fig. 4, Fig. 4 is the structural representation that Charging of the present invention unifies embodiment.The present embodiment charging system 401
Including charger 402, data wire 403 and electronic equipment 404, electronic equipment 404 is connected by data wire 403 with charger 402,
Charger 402 includes processor 405, the first feedback circuit 406 and charging circuit 407, and processor 405 feeds back with first respectively
Circuit 406 and charging circuit 407 couple, and electronic equipment 404 includes the second feedback circuit 408, wherein：Pass through in charger 402
Data wire 403 to electronic equipment 404 charge when, the first feedback circuit 406 is connected with the second feedback circuit 408 by data wire 403
Connect, processor 405 detects electronic equipment 404 and data wire 403 by the first feedback circuit 406 and the second feedback circuit 408
The voltage of junction is first voltage；Processor 405 obtains first voltage and the first difference of preset voltage value；Processor 405
First voltage is adjusted by charging circuit 407 according to the first difference, so that the first voltage after adjustment is equal to preset voltage value.
Certainly, the electronic equipment 404 of the present embodiment further comprises charging control circuit 409, respectively with data wire 403 and
Second feedback circuit 408 couples, for being charged according to above-mentioned first voltage control electronics 404.
The first voltage of the adjustment of the present embodiment is the voltage of data wire 403 and the junction of electronic equipment 404, first voltage
The charging voltage of electronic equipment 404 can be more directly reacted, without regard to charger 402 and the grade charging circuit of data wire 403
The voltage consumed on footpath, it can more directly, accurately adjust the charging voltage of electronic equipment 404.
For the control of the output voltage of charger 402, the present embodiment charging system 401 is in the output voltage of charger 402
When, the first feedback circuit 406 is disconnected with the second feedback circuit 408, and processor 405 is detected by the first feedback circuit 406
Voltage to the output end of charger 402 is second voltage；It is second poor to obtain second voltage and preset voltage value for processor 405
Value；Processor 405 adjusts second voltage according to the second difference by charging circuit 407, so that the second voltage after adjustment is equal to
Preset voltage value.
Wherein, also referring to Fig. 5, Fig. 6, Fig. 5 is the circuit diagram of Fig. 4 embodiment charging systems；Fig. 6 is Fig. 5 realities
Apply the first feedback circuit of example and the second feedback circuit connected by data wire after equivalent circuit.First feedback of the present embodiment
Circuit 406 includes first resistor R1 and second resistance R2, the VBUS ends of first resistor R1 one end connection data wire 403, and first
Resistance R1 other end connection data wire R3 ID ends and processor 405, the ID of second resistance R2 one end connection data wire 403
End, the GND ends of second resistance R2 other end connection data wire 403.Second feedback circuit 408 includes 3rd resistor R3 and the 4th
The VBUS ends of resistance R4,3rd resistor R3 one end connection data wire 403,3rd resistor R3 other end connection data wire 403
ID ends, the 4th resistance R4 one end connection data wire 403 ID ends, the other end connect data wire 403 GND ends.It can manage
Solution, one end of connection charger 402 and one end of electronic equipment 404 of the data wire 403 of the present embodiment have identical
Port, charger 402 connect the corresponding port at the both ends of data wire 403 with electronic equipment 404 respectively.Certainly, the present embodiment
Data wire 403 can also include data terminal D+ and data terminal D-, for carrying out data transmission, for example, can be by electronic equipment 404
It can be carried out data transmission by the data terminal D+ and data terminal D- of data wire 403 with exterior terminal.
It is equivalent after first feedback circuit 406 of the present embodiment and the second feedback circuit 408 are connected by data wire 403
In circuit diagram, the first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 of the present embodiment meet following conditions：
(VIN+IC*R0-VFB)/R1-VFB/R2+ (VIN-VFB)/R3=VFB/R4；
Wherein, VIN is first voltage, IC be charger 402 to the charging current of electronic equipment 404, VFB is processor
405 feedback voltages received, feedback circuit is that the first feedback circuit 406 and the second feedback circuit 408 produce according to first voltage,
R0 is that charger 402 arrives electronic equipment 404 and the equivalent resistance of the junction of data wire 403.
Specifically, the present embodiment disconnects the first feedback circuit 406 and the second feedback circuit first in charger output voltage
408 must connect, now, R1/R2=(VBUS-VFB) * VFB, therefore when carrying out circuit setting, can according to the VFB of reference and
VBUS sets R1 and R2 matching relationship；When charger 402 charges to electronic equipment 404, connected by data wire 403
Afterwards, there are VBUS=VIN+IC*R0, I1=(VBUS-VFB)/R1=(VIN+IC*R0-VFB)/R1, I2=VFB/R2, I3=
(VIN-VFB)/R3, I4=VFB/R4, and I4=I1-I2+I3=(VIN+IC*R0-VFB)/R1-VFB/R2+ (VIN-VFB)/
R3=VFB/R4, therefore, R3 and R4 matching relationship can be learnt by above-mentioned formula.
First feedback circuit 406 of the present embodiment can further include electric capacity C1, the feedback electricity for first voltage
Pressure carries out voltage stabilizing.
Alternatively, the present embodiment charging system 401 further comprises first switch T1, first switch T1 respectively with processor
405 and charging circuit 407 couple, first switch T1 controls charging circuit 407 under the control of the output signal of processor 405
First voltage is adjusted, output signal produces according to the first difference；Wherein, charging circuit 407 further comprises diode D1, electric capacity
C2 and the 5th resistance R5；Electric capacity C2 connects with the 5th resistance R5, electric capacity C2 connected with the 5th resistance R5 after circuit, first switch
T1 and diode D1 three are parallel with one another.
Alternatively, the further second switch T2 of the present embodiment charging system 401, charging circuit 407 further comprise transformation
Device 501, second switch T2 couple with processor 405 and transformer 501 respectively, and transformer 501 is in parallel with above-mentioned parallel circuit, place
The output voltage that device 405 controls transformer 501 by second switch T2 is managed, to adjust the defeated of the parallel circuit of charging circuit 407
Enter voltage.The present embodiment adjusts the defeated of charging circuit 407 jointly by first switch T1, second switch T2 and transformer 501
Go out voltage.
The first switch T1, second switch T2 of the present embodiment can be, but not limited to, NPN or PNP type triode, field-effect
Transistor etc..
The present invention further provides the charging system of another embodiment, the charging system disclosed in the present embodiment is in above-mentioned reality
Apply and be described on the basis of the charging system of example.Referring to Fig. 7, Fig. 7 is the structure of another embodiment of charging system of the present invention
Schematic diagram.The charger 702 of the present embodiment charging system 701 further comprises input circuit 703 and first interface circuit 704,
The electronic equipment 705 of the present embodiment charging system 701 further comprises battery 706, second interface circuit 707, battery management electricity
Road 708, central processing unit (Central Processing Unit, CPU) 709, display circuit 710, radio circuit 711.Its
In, input circuit 703 is used to the alternating voltages such as civil power being converted into DC voltage, and first interface circuit 704, which is used to send, to charge
The electric signal of circuit 717 is to data wire 712, and receives the electric signal that data wire 712 receives from second interface circuit 707,
CPU709 control display circuits 710 show that control radio circuit 711 carries out the transmitting-receiving of signal, and control battery management circuit 708 is right
Battery 706 is charged.
Wherein, when charger 702 is charged by data wire 712 to electronic equipment 705, the first feedback circuit 713 and
Two feedback circuits 714 are connected by 712 grades of first interface circuit 704, data wire second interface circuits 707, and processor 715 passes through
First feedback circuit 713 and the second feedback circuit 714 detect second interface circuit 707 and the junction of battery management circuit 708
Voltage be first voltage；Processor 715 obtains first voltage and the first difference of preset voltage value；Processor 715 is according to
One difference adjusts first voltage by transformer 716 and charging circuit 717, so that the first voltage after adjustment is equal to predeterminated voltage
Value.The first voltage for being capable of second interface circuit 707 and the junction of battery management circuit 708 is maintained at preset voltage value, can
The problem of improvement causes 705 actual charging voltage of electronic equipment to reduce because of voltage consumption on charge path, so as to improve
The charge efficiency of electronic equipment 705.
In order to solve the above technical problems, another technical solution used in the present invention is：A kind of electronic equipment is provided.It please join
Fig. 8 is read, Fig. 8 is the electrical block diagram of the embodiment of electronic equipment one of the present invention.The specific knot of the present embodiment electronic equipment 801
Structure and charging principle have carried out detailed narration in the above-described embodiments, do not repeat here.The present embodiment electronic equipment 801 wraps
Include the second feedback circuit 802, the second feedback circuit 802 is by the of data wire (not shown) and the junction of charging control circuit 803
One Voltage Feedback gives charger (not shown), so that charger adjustment first voltage is equal to predeterminated voltage.
Prior art is different from, the present embodiment electronic equipment 801 can improve to be caused because of voltage consumption on charge path
The problem of 801 actual charging voltage of electronic equipment reduces, so as to improve the charge efficiency of electronic equipment 801.
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, it is included within the scope of the present invention.
Claims (10)
1. a kind of charging method, it is characterised in that the charging method is applied to charging system, and the charging system includes charging
Device, data wire and electronic equipment, methods described include：
When the charger is charged by the data wire to the electronic equipment, the charger detects that the electronics is set
The voltage of standby and described data wire junction is first voltage；
The charger obtains the first voltage and the first difference of preset voltage value；
The charger adjusts the first voltage according to first difference, so that the first voltage after adjustment is equal to described pre-
If magnitude of voltage.
2. according to the method for claim 1, it is characterised in that methods described further comprises：
In the charger output voltage, the charger detects that the voltage of the output end of the charger is the second electricity
Pressure；
The charger obtains the second voltage and the second difference of the preset voltage value；
The charger adjusts the second voltage according to second difference, so that the second voltage after adjustment is equal to described pre-
If magnitude of voltage.
3. a kind of charging system, it is characterised in that the charging system includes charger, data wire and electronic equipment, the electricity
Sub- equipment is connected by the data wire with the charger, and the charger includes processor, the first feedback circuit and filled
Circuit, the processor couple with first feedback circuit and the charging circuit respectively, and the electronic equipment includes the
Two feedback circuits, wherein：
When the charger is charged by the data wire to the electronic equipment, first feedback circuit and described second
Feedback circuit is connected by the data wire, and the processor is examined by first feedback circuit and second feedback circuit
The voltage for measuring the electronic equipment and the data wire junction is first voltage；
The processor obtains the first voltage and the first difference of preset voltage value；
The processor adjusts the first voltage according to first difference by the charging circuit, so that the after adjustment
One voltage is equal to the preset voltage value.
4. system according to claim 3, it is characterised in that in the charger output voltage, first feedback
Circuit disconnects with second feedback circuit, and the processor detects the charger by first feedback circuit
The voltage of output end be second voltage；
The processor obtains the second voltage and the second difference of the preset voltage value；
The processor adjusts the second voltage according to second difference by the charging circuit, so that the after adjustment
Two voltages are equal to the preset voltage value.
5. system according to claim 3, it is characterised in that first feedback circuit includes first resistor and the second electricity
Resistance, one end of the first resistor connect the VBUS ends of the data wire, and the other end of the first resistor connects the data
The ID ends of line and the processor, one end of the second resistance connect the ID ends of the data wire, the second resistance it is another
One end connects the GND ends of the data wire.
6. system according to claim 5, it is characterised in that second feedback circuit includes 3rd resistor and the 4th electricity
Resistance, one end of the 3rd resistor connect the VBUS ends of the data wire, and the other end of the 3rd resistor connects the data
The ID ends of line, one end of the 4th resistance connect the ID ends of the data wire, and the other end connects the GND ends of the data wire.
7. system according to claim 6, it is characterised in that the first resistor, the second resistance, the 3rd electricity
Resistance and the 4th resistor satisfied condition：
(VIN+IC*R0-VFB)/R1-VFB/R2+ (VIN-VFB)/R3=VFB/R4；
Wherein, the VIN is the first voltage, and the IC is the charger to the charging current of the electronic equipment, institute
It is the feedback voltage that the processor receives to state VFB, and the feedback voltage is first feedback circuit and second feedback
Circuit produces according to the first voltage, and the R1, the R2, the R3 and the R4 be respectively the first resistor, described
Second resistance, the 3rd resistor and the 4th resistance, the R0 are the charger to the electronic equipment and the number
According to the equivalent resistance of line junction resistance.
8. system according to claim 3, it is characterised in that the system further comprises first switch, described first
Switch couples with the processor and the charging circuit respectively, control of the first switch in the output signal of the processor
The system lower control charging circuit adjusts the first voltage, and the output signal produces according to first difference；
Wherein, the charging circuit further comprises diode, electric capacity and the 5th resistance；The electric capacity and the 5th resistance string
Connection, the electric capacity and the circuit after the 5th resistant series, the first switch and the diode three are parallel with one another, shape
Into parallel circuit.
9. system according to claim 8, it is characterised in that the system further comprises second switch, the charging
Circuit further comprises transformer, and the second switch couples with the processor and the transformer respectively, the transformer
Coupled with the parallel circuit, the processor controls the output voltage of the transformer by the second switch, with adjustment
The input voltage of the parallel circuit of the charging circuit.
10. a kind of electronic equipment, it is characterised in that the electronic equipment is that the electronics described in any one of claim 3 to 9 is set
It is standby.
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