CN108233506A - A kind of charging circuit, electronic equipment and wireless charging system - Google Patents
A kind of charging circuit, electronic equipment and wireless charging system Download PDFInfo
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- CN108233506A CN108233506A CN201710643155.0A CN201710643155A CN108233506A CN 108233506 A CN108233506 A CN 108233506A CN 201710643155 A CN201710643155 A CN 201710643155A CN 108233506 A CN108233506 A CN 108233506A
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- H02J7/045—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
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Abstract
A kind of charging circuit, electronic equipment and wireless charging system, including electric energy receiving module, rectification module, voltage-dropping type modular converter and voltage-dropping type charging module, electric energy receiving module can receive the electric signal of wireless adapter transmitting and generate alternating current, the alternating current can be converted to direct current by rectification module, voltage-dropping type modular converter can adjust the voltage value of the direct current to target output voltage value, and voltage-dropping type charging module voltage value can be depressured for the direct current of the target output voltage value after output to battery.That is, electric energy is converted using decompression cascade structure after rectification, can significantly increase the prime input voltage of charging circuit, reduce the prime input current of charging circuit, can not only reduce the power attenuation in charging circuit, reduce fever and improve device security；And since low current is relatively low to the performance requirement of electric energy receiving module, it can also reduce the hardware cost of charging circuit.
Description
Technical field
The present invention relates to a kind of charging technique field more particularly to charging circuit, electronic equipment and wireless charging systems.
Background technology
It is constantly promoted with the configuration of electronic equipment and constantly become larger to the demand and consumption of electricity, electronics is set
The charging modes of standby battery are more and more, and in order to improve the convenience of charging, the mode of wireless charging has been increasingly becoming one
The new charge trend of kind.
As shown in Figure 1, the wireless charging circuit of the electronic equipment side of the prior art mainly uses Buck converters and Buck
Charging circuit；Wherein, Buck converters are more stable for the direct current that prime exports to be adjusted to ripple smaller, voltage value
Direct current；Buck charging circuits are used to that the direct current that Buck converters export to be adjusted and charged the battery.
But in said structure, the energy conversion efficiency of Buck converters and Buck charging circuits is relatively low, causes
The whole energy conversion efficiency of entire wireless charging circuit is lower, not only affects the charge efficiency of electronic equipment；Moreover, because
The form of expression of power attenuation is fever, therefore, can also reduce user experience and influence the safety of electronic equipment.
Invention content
An embodiment of the present invention provides a kind of charging circuit, electronic equipment and wireless charging systems, existing to solve
Wireless charging circuit is due to the problem of relatively low caused electronic equipment charge efficiency of energy conversion efficiency is low and fever is serious.
On the one hand, an embodiment of the present invention provides a kind of charging circuit, including electric energy receiving module, rectification module, decompression
Type modular converter and voltage-dropping type charging module, wherein：
The electric energy receiving module, for receiving the electric signal of wireless adapter transmitting and generating alternating current；
The rectification module, for the alternating current to be converted to direct current；
The voltage-dropping type modular converter, for adjusting the voltage value of the direct current to target output voltage value；
The voltage-dropping type charging module, after being depressured to voltage value for the direct current of the target output voltage value
It exports to battery.
Preferably, the charging circuit further includes control module, the control module, for the charging shape according to battery
The parameter information of state information and charging circuit determines the target output voltage value, and is sent to the voltage-dropping type modular converter
Control signal that the voltage-dropping type modular converter is controlled to adjust the voltage value of the direct current to target output voltage value；Its
In, charging status information includes battery voltage value or battery voltage value and charging current value.
Still optionally further, the control module, is specifically used for,
If it is determined that battery voltage value VBATHigher than the first setting voltage threshold VBATTHAnd not higher than the second setting voltage threshold
VCV-ΔVBATAnd charging current value IBATLess than goal-selling charging current value IBATSET, it is determined that enable to IBATIncreased mesh
Mark output voltage values VBOUT；
If it is determined that battery voltage value VBATHigher than the first setting voltage threshold VBATTHAnd not higher than the second setting voltage threshold
VCV-ΔVBATAnd charging current value IBATWithin goal-selling charging current value range, it is determined that so that the charging electricity
Realize the target output voltage value V of constant-current charge in roadBOUT；
If it is determined that battery voltage value VBATHigher than the second setting voltage threshold VCV-ΔVBATAnd set voltage threshold less than third
VCV+ΔVBAT, and charging current value IBATHigher than default cut-off charging current value IBATEND, it is determined that so that the charging circuit is real
The target output voltage value V of existing constant-voltage chargeBOUT；
Wherein, the first setting voltage threshold VBATTHNot higher than the described second setting voltage threshold VCV-ΔVBAT, Δ
VBATFor positive number.
Still optionally further, the control module, is specifically used for,
If it is determined that VBATTH<VBAT≤VCV-ΔVBAT, and IBAT<IBATSET-ΔI1, it is determined that VBOUT=V'BOUT+ΔV1；Wherein,
V'BOUTThe target output voltage value determining for the last time；
If it is determined that VBATTH<VBAT≤VCV-ΔVBAT, and IBATSET-ΔI1≤IBAT<IBATSET-ΔI2, it is determined that VBOUT=
V'BOUT+ΔV2；Wherein, Δ I1、ΔI2、ΔV1And Δ V2For positive number；
If it is determined that VBATTH<VBAT≤VCV-ΔVBAT, and IBATSET-ΔI2≤IBAT≤IBATSET+ΔI2, then V is kept firstBOUT
It is constant, and perform following operate：When determining IBAT>IBATSET-ΔI3When, keep VBOUTIt is constant；When determining IBAT≤IBATSET-ΔI3
When, determine VBOUT=V'BOUT+ΔV2；Wherein, Δ I3For positive number；
If it is determined that VCV-ΔVBAT<VBAT<VCV+ΔVBAT, and IBAT>IBATEND, it is determined that VBOUT=V'BOUT-ΔV2。
Preferably, the voltage-dropping type charging module includes a voltage-dropping type charge pump charging submodule or more than two series connection
Voltage-dropping type charge pump charging submodule.
Still optionally further, any voltage-dropping type charge pump charging submodule include first switch group, second switch group,
First derided capacitors and the second derided capacitors,
Any voltage-dropping type charge pump charging submodule, the first control for being issued in response to the control module are believed
Number, the first switch group is opened, closes the second switch group so that first derided capacitors and the second derided capacitors
Charging, and direct current of the output voltage size for the voltage value of first derided capacitors；And in response to the control module
The second control signal issued closes the first switch group, opens the second switch group so that first derided capacitors
And second derided capacitors electric discharge, and output voltage size for first derided capacitors voltage value direct current.
Still optionally further, the parameter information of the charging circuit includes the voltage-dropping type charge pump charging submodule of series connection
The voltage conversion efficiency of series N, any voltage-dropping type charge pump charging submoduleAnd any voltage-dropping type charge pump charging
The ratio between input voltage and output voltage of moduleIn it is any one or more；Wherein, N is the positive integer more than or equal to 1,
I=1,2 ... N；
The control module, specifically for if it is determined that battery voltage value VBATHigher than the first setting voltage threshold VBATTHIt is and low
In third setting voltage threshold VCV+ΔVBATWhen, in the following ways determine the voltage-dropping type modular converter initial output voltage
Value is as target output voltage valueWherein, the first setting voltage threshold VBATTHLess than described
Third setting voltage threshold VCV+ΔVBAT。
Preferably, the charging circuit further includes Buck charging modules, wherein：
The control module is additionally operable to if it is determined that battery voltage value VBATNot higher than the first setting voltage threshold VBATTHOr
Battery voltage value VBATHigher than the second setting voltage threshold VCV-ΔVBATAnd less than third setting voltage threshold VCV+ΔVBATAnd it fills
Electric current value IBATNot higher than default cut-off charging current value IBATEND, then terminate to the voltage-dropping type modular converter and send control letter
Number the voltage-dropping type modular converter to be kept to close；Wherein, the first setting voltage threshold VBATTHIt is set not higher than described second
Constant voltage threshold value VCV-ΔVBAT, Δ VBATFor positive number；
The Buck charging modules, the direct current for being exported to the rectification module are exported after being adjusted to the electricity
Pond.
On the other hand, the embodiment of the present invention additionally provides a kind of electronic equipment, including above-mentioned charging circuit.
In another aspect, the embodiment of the present invention additionally provides a kind of wireless charging system, including wireless adapter, battery and
Above-mentioned charging circuit.
The present invention has the beneficial effect that：
An embodiment of the present invention provides a kind of charging circuit, electronic equipment and wireless charging systems, and mould is received including electric energy
Block, rectification module, voltage-dropping type modular converter and voltage-dropping type charging module, electric energy receiving module can receive wireless adapter transmitting
Electric signal and generate alternating current, the alternating current can be converted to direct current by rectification module, and voltage-dropping type modular converter can be by institute
State direct current voltage value adjust to target output voltage value and, voltage-dropping type charging module can be the target to voltage value
The direct current of output voltage values is exported after being depressured to battery.That is, using the cascade structure pair of decompression after rectification
Electric energy is converted, and can significantly be increased the prime input voltage of charging circuit, be reduced the prime input current of charging circuit, no
The power attenuation in charging circuit can be only reduced, reduce fever and improves device security；And since low current is to electric energy
The performance requirement of receiving module is relatively low, therefore can also reduce the hardware cost of charging circuit.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 show the structure diagram of the wireless charging circuit of the electronic equipment side of the prior art；
Fig. 2 show a kind of structure diagram of charging circuit provided in an embodiment of the present invention；
Fig. 3 show another structure diagram of charging circuit provided in an embodiment of the present invention；
Fig. 4 show the structure diagram of the voltage-dropping type charging module of the charging circuit in the embodiment of the present invention；
Fig. 5 show the structural representation of the voltage-dropping type charge pump charging submodule of the charging circuit in the embodiment of the present invention
Figure；
Fig. 6 show another structure diagram of charging circuit provided in an embodiment of the present invention；
Fig. 7 show the charging process flow chart of charging circuit provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing into
It is described in detail to one step, it is clear that described embodiment is only the implementation of part of the embodiment of the present invention rather than whole
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
All other embodiment, shall fall within the protection scope of the present invention.
Embodiment：
An embodiment of the present invention provides a kind of charging circuit, specifically, as shown in Fig. 2, it is institute in the embodiment of the present invention
The structure diagram of charging circuit is stated, the charging circuit may include that electric energy receiving module 201, rectification module 202, voltage-dropping type turn
Block 203 and voltage-dropping type charging module 204 are changed the mold, wherein：
The electric energy receiving module 201, for receiving the electric signal of wireless adapter transmitting and generating alternating current；
The rectification module 202, for the alternating current to be converted to direct current；
The voltage-dropping type modular converter 203, for adjusting the voltage value of the direct current to target output voltage value；
The voltage-dropping type charging module 204, for being dropped to direct current of the voltage value for the target output voltage value
It is exported after pressure to battery.
That is, being converted after rectification using the cascade structure of decompression to electric energy, it can significantly increase charging electricity
The prime input voltage on road, the prime input current for reducing charging circuit can reduce the power of the equiva lent impedance in charging circuit
Loss reduces fever, improves the energy conversion efficiency, charge efficiency and safety of charging circuit.
In addition, receiving coil realization, the low current pair of charging circuit prime input can be used in the electric energy receiving module 201
The performance requirement of receiving coil is relatively low, therefore, can also reduce the hardware cost of charging circuit.It should be noted that receiving coil
Match with the electric energy transmitting coil in wireless adapter, and can be based in electric induction, magnetic induction, magnetic resonance and electromagnetic wave
Either type receives the electric signal of wireless adapter transmitting, and the present embodiment is not limited in any way herein.
Optionally, the voltage-dropping type modular converter 203, concretely voltage-dropping type Buck converters；Voltage-dropping type Buck is converted
The voltage difference of the transfer efficiency of device and the voltage difference correlation of its input voltage and output voltage, input voltage and output voltage is got over
Small, transfer efficiency is higher；Therefore, in the case where battery voltage value is certain, compared with the output of the Buck converters of technology
End connection Buck charging circuits are compared, the output terminal connection voltage-dropping type charging module 204 of voltage-dropping type Buck converters, voltage-dropping type
The output voltage of Buck converters is higher, i.e. the input voltage of voltage-dropping type Buck converters and the voltage difference of output voltage is smaller,
So as to improve the transfer efficiency of voltage-dropping type Buck converters, and then further improve the transfer efficiency of charging circuit.
Preferably, as shown in figure 3, the charging circuit may also include control module 301, the control module 301 can
For the charging status information and the parameter information of charging circuit according to battery, the target output voltage value is determined, and to institute
It states voltage-dropping type modular converter 203 and sends control signal to control the voltage-dropping type modular converter 203 by the voltage of the direct current
Value is adjusted to target output voltage value；Wherein, charging status information includes battery voltage value or battery voltage value and charging electricity
Flow valuve.
It should be noted that value of the charging current value for the electric current of the voltage-dropping type charging module 204 output, i.e., directly
It is connected in the size for the electric current that battery charges；In addition, in order to enable charging process control it is more accurate, extend high current as possible
The time of charging improves charge efficiency, and the battery voltage value is preferably the voltage value of battery battery core.
Still optionally further, the control module can be specifically used for if it is determined that battery voltage value VBATHigher than the first setting electricity
Press threshold value VBATTHAnd not higher than the second setting voltage threshold VCV-ΔVBATAnd charging current value IBATIt charges less than goal-selling electric
Flow valuve IBATSET, it is determined that enable to IBATIncreased target output voltage value VBOUT；If it is determined that battery voltage value VBATHigher than
One setting voltage threshold VBATTHAnd not higher than the second setting voltage threshold VCV-ΔVBATAnd charging current value IBATPositioned at default mesh
It marks within charging current value range, it is determined that so that the charging circuit realizes the target output voltage value of constant-current charge
VBOUT；If it is determined that battery voltage value VBATHigher than the second setting voltage threshold VCV-ΔVBATAnd less than third setting voltage threshold VCV+
ΔVBAT, and charging current value IBATHigher than default cut-off charging current value IBATEND, it is determined that so that the charging circuit realizes perseverance
Press the target output voltage value V of chargingBOUT；Wherein, the first setting voltage threshold VBATTHNot higher than the described second setting electricity
Press threshold value VCV-ΔVBAT, Δ VBATFor positive number.
It should be noted that the first setting voltage threshold VBATTHIt can flexibly be set according to actual use demand, preferably
Ground, VBATTHIt may be configured as the lower threshold of the constant-current phase of battery charging process, such as 2.8V~3V；The second setting voltage
Threshold value VCV-ΔVBATAnd third setting voltage threshold VCV+ΔVBATAlso it can flexibly be set according to actual use demand, it is preferable that
VCVThe upper limit threshold of the constant-current phase of battery charging process is may be configured as, i.e. battery charging process enters constant pressure rank by constant-current phase
The threshold value of section, such as 3.8V~4.6V；ΔVBATIt may be configured as a smaller voltage value, such as 1V.It that is, can be by battery
Charging process is divided into three phases：Charging stage, constant-current phase and constant-voltage phase；In charging stage, control module determines
Target output voltage value VBOUTSo that the size of charging current is gradually to goal-selling charging current value IBATSETIt (can be according to reality
Use demand is flexibly set) it is close；In constant-current phase, the size of charging current is located at goal-selling charging current value range
After within (can flexibly be set according to actual use demand), control module determines the size mesh stable as possible so that charging current
Mark output voltage values VBOUT；In constant-voltage phase, after battery voltage value is sufficiently large, control module determines to cause the big of cell voltage
The target output voltage value V of small held stationaryBOUT。
Still optionally further, the control module 301 can be specifically used for as determining VBATTH<VBAT≤VCV-ΔVBAT, and
IBAT<IBATSET-ΔI1When, it is determined that VBOUT=V'BOUT+ΔV1；Wherein, V'BOUTThe target output voltage value determining for the last time；
ΔV1It can flexibly be set according to actual use demand, for example, 100mV；ΔI1It can flexibly be set according to actual use demand, for example,
1000mA。
That is, in charging stage, it is preferable that determine that (charging current value is being set charging current value stabilization each
Variable quantity in time span is not more than given threshold) after, however, it is determined that charging current value is much smaller than goal-selling charging current
Value then increases the output voltage values of the voltage-dropping type modular converter 203 with the step-length of setting so that charging current value gradually,
Promptly close to goal-selling charging current value.
The control module 301 can be specifically used for as determining VBATTH<VBAT≤VCV-ΔVBAT, and IBATSET-ΔI1≤IBAT<
IBATSET-ΔI2, it is determined that VBOUT=V'BOUT+ΔV2；Wherein, Δ I1、ΔI2、ΔV1And Δ V2For positive number；Preferably, Δ I1>
ΔI2, Δ V1>ΔV2；ΔV2It can flexibly be set according to actual use demand, for example, 20mV；ΔI2It can be according to actual use demand
Flexibly setting, for example, 200mA.
That is, in charging stage, it is preferable that after each determining charging current value stabilization, however, it is determined that charging electricity
For flow valuve close to goal-selling charging current value, then the smaller step-length that can be set increases the voltage-dropping type modular converter 203
Output voltage values, so that charging current value gradually, smoothly reaches goal-selling charging current value.
The control module 301 can be specifically used for as determining VBATTH<VBAT≤VCV-ΔVBAT, and IBATSET-ΔI2≤IBAT
≤IBATSET+ΔI2When, then V is kept firstBOUTIt is constant, and perform following operate：When determining IBAT>IBATSET-ΔI3When, it keeps
VBOUTIt is constant；When determining IBAT≤IBATSET-ΔI3When, determine VBOUT=V'BOUT+ΔV2；Wherein, Δ I3For positive number；Preferably, Δ
I1>ΔI3；ΔI3It can flexibly be set according to actual use demand, for example, 400mA.
That is, after charging process enters constant-current phase, however, it is determined that charging current value is located at goal-selling charging
When within the scope of On The Current Value, then the output voltage values that can keep the voltage-dropping type modular converter 203 are constant；Battery voltage value meeting
With charging process increase, and the output voltage values of the voltage-dropping type modular converter 203 are constant, therefore charging current value
It can be gradually reduced；After determining that charging current value is reduced to below the lower limit of goal-selling charging current value range, then may be used
Increase the output voltage values of the voltage-dropping type modular converter 203 with the smaller step-length of setting, charging current value is controlled pre-
If within target charge current value range.
The control module 301 can be specifically used for as determining VCV-ΔVBAT<VBAT<VCV+ΔVBAT, and IBAT>IBATENDWhen,
Then determine VBOUT=V'BOUT-ΔV2。
That is, after charging process enters constant-current phase, the smaller step-length that can be set reduces the voltage-dropping type conversion
The output voltage values of module 203, so that the voltage value of battery is held essentially constant, charging current value gradually reduces.
Preferably, as shown in figure 4, the voltage-dropping type charging module 204 may include a voltage-dropping type charge pump charging submodule
Block or the voltage-dropping type charge pump charging submodule of more than two series connection.
Still optionally further, as shown in figure 5, any voltage-dropping type charge pump charging submodule may include first switch group
(including switch Q1 and switch Q2), second switch group (including switch Q3 and switch Q4), the first derided capacitors C1 and second point
Voltage capacitance C2；Any voltage-dropping type charge pump charging submodule, for the first control issued in response to the control module
Signal opens first switch the group Q1 and Q2, closes second switch the group Q3 and Q4 so that the first derided capacitors C1
And second derided capacitors C2 charging, and output voltage size be the first derided capacitors C1 voltage value direct current；With
And in response to the second control signal that the control module issues, first switch the group Q1 and Q2 are closed, opens described second
Switching group Q3 and Q4 so that the first derided capacitors C1 and the second derided capacitors C2 electric discharges, and output voltage size is institute
State the direct current of the voltage value of the first derided capacitors C1.
That is, for any voltage-dropping type charge pump charging submodule, either (received in the derided capacitors charging stage
First control signal) or derided capacitors discharge regime (receiving second control signal), any voltage-dropping type charge pump charging
The size of the output voltage VO UT of submodule is equal to the voltage value of the first derided capacitors C1, therefore, (divides by adjusting duty ratio
The ratio between the charging duration of voltage capacitance and the summation of the charging duration of derided capacitors and the duration that discharges), it can determine any drop
The ratio between input voltage and output voltage of die mould charge pump charging submodule, such as ratio is 2, i.e., described any voltage-dropping type charge
The output voltage VO UT of pump charging submodule is the 1/2 of input voltage VIN, that is, realizes decompression conversion.
The series of voltage-dropping type charge pump charging submodule connected in the voltage-dropping type charging module 204 can be according to actually making
It is flexibly set with demand；Preferably, the series of the voltage-dropping type charge pump charging submodule of series connection is more, certain in cell voltage
In the case of, the input voltage of voltage-dropping type charging module 204 is higher；Therefore, multilevel decompression type charge pump charging submodule series connection can
It further improves the prime input voltage of charging circuit, reduce prime input current, reduce the equiva lent impedance band in charging circuit
The loss come improves the efficiency of electric energy conversion；In addition, when realizing voltage-dropping type modular converter 203 using voltage-dropping type Buck converters
When, since the charging submodule series connection of multilevel decompression type charge pump may be such that the input voltage of voltage-dropping type Buck converters and output electricity
The voltage difference smaller of pressure, therefore can further reduce the loss of voltage-dropping type Buck converters.
In addition, since there is no inductance in any voltage-dropping type charge pump charging submodule, that is, it is not present by perceptual member
The fever as caused by the equiva lent impedance of inductive element is also not present in coil loss caused by part and core loss；Therefore, with showing
There are the Buck charging circuits in technology to compare, the energy conversion efficiency higher of voltage-dropping type charge pump charging submodule, loss are lower,
So as to can further improve the safety of the charge efficiency of the charging circuit and electronic equipment.
Correspondingly, the parameter information of the charging circuit may include the series of the voltage-dropping type charge pump charging submodule of series connection
N, the voltage conversion efficiency of any voltage-dropping type charge pump charging submoduleAnd any voltage-dropping type charge pump charging submodule
Input voltage and the ratio between output voltageIn it is any one or more；Wherein, N is positive integer more than or equal to 1, i=
1,2……N；
The control module can also be specifically used for as determining battery voltage value VBATHigher than the first setting voltage threshold VBATTH
And less than third setting voltage threshold VCV+ΔVBATWhen, the initial of the voltage-dropping type modular converter 203 is determined in the following ways
Output voltage values are as target output voltage valueWherein, the first setting voltage threshold VBATTH
Less than third setting voltage threshold VCV+ΔVBAT。
That is, when charging beginning, it can be first according to battery voltage value, the charging submodule series connection of voltage-dropping type charge pump
Series, the ratio between the input voltage of charging submodule and output voltage and voltage conversion efficiency per level-one voltage-dropping type charge pump,
Determine the initial output voltage of the input voltage, i.e. voltage-dropping type modular converter 203 of the voltage-dropping type charging module 204 needed for charging,
Later can in real time according to battery voltage value and charging current value to the output voltage of voltage-dropping type modular converter 203 into Mobile state tune
It is whole.
Preferably, as shown in fig. 6, the charging circuit may also include Buck charging modules 601, wherein：
The control module, it may also be used for if it is determined that battery voltage value VBATNot higher than the first setting voltage threshold VBATTHOr
Person's battery voltage value VBATHigher than the second setting voltage threshold VCV-ΔVBATAnd less than third setting voltage threshold VCV+ΔVBATAnd
Charging current value IBATNot higher than default cut-off charging current value value IBATEND, then terminate and sent out to the voltage-dropping type modular converter 203
Send control signal that the voltage-dropping type modular converter 203 is kept to close；Wherein, the first setting voltage threshold VBATTHIt is not higher than
The second setting voltage threshold VCV-ΔVBAT, Δ VBATFor positive number；
The Buck charging modules, the direct current for being exported to the rectification module 202 are exported after being adjusted to institute
State battery.
That is, (such as battery voltage value V before the charging stage of battery charging processBATIt charged not higher than battery
The lower threshold of the constant-current phase of journey) or constant-voltage phase after (such as battery voltage value VBATNot less than battery charging process
The upper limit threshold of constant-current phase, and charging current value is not higher than default cut-off charging current value value IBATEND), it needs to use low current
When charging the battery, also controllable voltage-dropping type modular converter 203 and voltage-dropping type charging module 204 are stopped, by
Buck charging modules carry out electric energy conversion and charge the battery, and Buck charging circuits can be used in Buck charging modules, tool
Body realization method can refer to the prior art, and details are not described herein for the present embodiment.
In the following, the charging process of charging circuit described in the embodiment of the present invention one is carried out with flow chart shown in Fig. 7
It is discussed in detail：
Step S1：Charging starts；
Step S2：Obtain battery voltage value VBAT, judge whether VBAT>VBATTH, wherein, VBATTHFor the first setting voltage threshold
Value；If it is not, perform step S3；If so, perform step S4；
Step S3：It is charged based on Buck charging modules, and is jumped to after charging duration reaches setting time length
Step S2；
Step S4：Determine the initial output voltage value of voltage-dropping type modular converterWherein, N is
The series of voltage-dropping type charge pump charging submodule connected in voltage-dropping type charging module,It charges for any voltage-dropping type charge pump
The voltage conversion efficiency of submodule,For any voltage-dropping type charge pump charge submodule input voltage and output voltage it
It is the positive integer more than or equal to 1 than, N, i=1,2 ... N；
Step S5：With Δ V1Stepping improves the output voltage values V of voltage-dropping type modular converterBOUT；Wherein, Δ V1It is pre- for first
If voltage value；
Step S6：Obtain charging current value IBAT, treat IBATStep S7 is performed after rising to stationary value；
Step S7：Judge whether IBATSET-ΔI1≤IBAT, wherein, IBATSETFor goal-selling charging current value, Δ I1It is
One pre-set current value；If it is not, jump to step S5；If so, perform step S8；
Step S8：With Δ V2Stepping improves the output voltage values V of voltage-dropping type modular converterBOUT, Δ V2For the second predeterminated voltage
Value, Δ V1>ΔV2；
Step S9：Obtain charging current value IBAT, treat IBATStep S10 is performed after rising to stationary value；
Step S10：Judge whether IBATSET-ΔI2≤IBAT≤IBATSET+ΔI2, wherein Δ I2For the second pre-set current value,
ΔI1>ΔI2；If it is not, jump to step S8；If so, perform step S11；
Step S11：Keep the output voltage values V of voltage-dropping type modular converterBOUTIt is constant；
Step S12：Obtain charging current value IBAT, treat IBAT≤IBATSET-ΔI3Afterwards, step 13 is performed；Wherein, Δ I3It is
Three pre-set current values, Δ I1>ΔI3；
Step S13：With Δ V2Stepping improves the output voltage values V of voltage-dropping type modular converterBOUT；
Step S14：Judge whether VCV-ΔVBAT<VBAT<VCV+ΔVBAT, wherein, VCV-ΔVBATFor the second setting voltage threshold
Value, VCV+ΔVBATVoltage threshold, and V are set for thirdBATTHNot higher than VCV-ΔVBAT, Δ VBATFor positive number；If it is not, jump to step
Rapid S11；If so, perform step S15；
Step S15：Charging process enters constant pressure (CV) stage；
Step S16：With Δ V2Stepping reduces the output voltage values V of voltage-dropping type modular converterBOUT；
Step S17：Judge whether IBAT≤IBATEND, IBATENDFor default cut-off charging current value；If so, jump to step
S19；If it is not, perform step S18；
Step S18：Treat VCV-ΔVBAT<VBAT<VCV+ΔVBATLater, step S16 is jumped to；
Step S19：It is charged based on Buck charging modules；
Step S20：Charging terminates.
It should be noted that in charging process shown in Fig. 7, step S5~step S10 is charging stage, step S11
~step S14 is constant-current phase, and step S15~step S18 is constant-voltage phase；Entire charging process shown in Fig. 7, suitable for opening
The voltage value of battery too low scene when beginning to charge；If the voltage of battery is more than the threshold value of setting, charging process when starting to charge up
Also it can be directly entered constant-current phase or constant-voltage phase after step s4；If the voltage higher of battery, charging process also can be
It directly performs step S19 after step S2 to charge based on Buck charging modules, details are not described herein for the present embodiment.
Further optionally, the charging circuit may also include load switch module, and the load switch module may be disposed at
Between the rectification module 202 and the voltage-dropping type modular converter, for the switching of wired charging method and wireless charging mode,
It can also be used to carry out overcurrent protection to the charging circuit, details are not described herein for the present embodiment.
In conclusion charging circuit provided in an embodiment of the present invention, including electric energy receiving module, rectification module, voltage-dropping type
Modular converter and voltage-dropping type charging module, electric energy receiving module can receive the electric signal of wireless adapter transmitting and generate exchange
The alternating current can be converted to direct current by electricity, rectification module, and voltage-dropping type modular converter can be by the voltage value tune of the direct current
It is whole to target output voltage value and, voltage-dropping type charging module can be to direct current that voltage value is the target output voltage value
It is exported after being depressured to battery.That is, electric energy is converted using decompression cascade structure after rectification, it can be substantially
The prime input voltage of degree increase charging circuit, the prime input current for reducing charging circuit, can not only reduce in charging circuit
Power attenuation, reduce fever and improve device security；And since low current is to the performance requirement of electric energy receiving module
It is relatively low, therefore can also reduce the hardware cost of charging circuit.
In addition, since inductance being not present in the voltage-dropping type charging module, that is, the coil as caused by inductive element is not present
The fever as caused by the equiva lent impedance of inductive element is also not present in loss and core loss；Therefore, with it is of the prior art
Buck charging circuits are compared, and the energy conversion efficiency higher of voltage-dropping type charging module, loss are lower, so as to can further improve
State the charge efficiency of charging circuit and the safety of electronic equipment.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of electronic equipment, and the electronic equipment includes
The charging circuit provided in this embodiment.
In addition, the embodiment of the present invention additionally provides a kind of wireless charging system, the wireless charging system may include wirelessly
Adapter, battery and the charging circuit provided in this embodiment.
It should be noted that any number of elements in drawing and description is used to example and unrestricted and any
Name is only used for distinguishing, without any restrictions meaning.
It will be understood by those skilled in the art that the embodiment of the present invention can be provided as method, apparatus (equipment) or computer journey
Sequence product.Therefore, in terms of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware
The form of embodiment.Moreover, the calculating for wherein including computer usable program code in one or more can be used in the present invention
The computer program that machine usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow chart of device (equipment) and computer program product
And/or block diagram describes.It should be understood that each flow in flowchart and/or the block diagram can be realized by computer program instructions
And/or the flow in box and flowchart and/or the block diagram and/or the combination of box.These computer programs can be provided to refer to
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is enabled to generate
One machine so that the instruction generation performed by computer or the processor of other programmable data processing devices is used to implement
The device of function specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of charging circuit, which is characterized in that including electric energy receiving module, rectification module, voltage-dropping type modular converter and drop
Die mould charging module, wherein：
The electric energy receiving module, for receiving the electric signal of wireless adapter transmitting and generating alternating current；
The rectification module, for the alternating current to be converted to direct current；
The voltage-dropping type modular converter, for adjusting the voltage value of the direct current to target output voltage value；
The voltage-dropping type charging module, for voltage value for the target output voltage value direct current be depressured after export
To battery.
2. charging circuit as described in claim 1, which is characterized in that control module is further included, wherein：
The control module for the charging status information and the parameter information of charging circuit according to battery, determines the target
Output voltage values, and control signal is sent to control the voltage-dropping type modular converter will be described straight to the voltage-dropping type modular converter
The voltage value of galvanic electricity is adjusted to target output voltage value；Wherein, charging status information includes battery voltage value or cell voltage
Value and charging current value.
3. charging circuit as claimed in claim 2, which is characterized in that the control module is specifically used for,
If it is determined that battery voltage value VBATHigher than the first setting voltage threshold VBATTHAnd not higher than the second setting voltage threshold VCV-Δ
VBATAnd charging current value IBATLess than goal-selling charging current value IBATSET, it is determined that enable to IBATIncreased target is defeated
Go out voltage value VBOUT；
If it is determined that battery voltage value VBATHigher than the first setting voltage threshold VBATTHAnd not higher than the second setting voltage threshold VCV-Δ
VBATAnd charging current value IBATWithin goal-selling charging current value range, it is determined that so that the charging circuit is real
The target output voltage value V of existing constant-current chargeBOUT；
If it is determined that battery voltage value VBATHigher than the second setting voltage threshold VCV-ΔVBATAnd less than third setting voltage threshold VCV+
ΔVBAT, and charging current value IBATHigher than default cut-off charging current value IBATEND, it is determined that so that the charging circuit realizes perseverance
Press the target output voltage value V of chargingBOUT；
Wherein, the first setting voltage threshold VBATTHNot higher than the described second setting voltage threshold VCV-ΔVBAT, Δ VBATFor just
Number.
4. charging circuit as claimed in claim 3, which is characterized in that the control module is specifically used for,
If it is determined that VBATTH<VBAT≤VCV-ΔVBAT, and IBAT<IBATSET-ΔI1, it is determined that VBOUT=V'BOUT+ΔV1；Wherein,
V'BOUTThe target output voltage value determining for the last time；
If it is determined that VBATTH<VBAT≤VCV-ΔVBAT, and IBATSET-ΔI1≤IBAT<IBATSET-ΔI2, it is determined that VBOUT=V'BOUT+Δ
V2；Wherein, Δ I1、ΔI2、ΔV1And Δ V2For positive number；
If it is determined that VBATTH<VBAT≤VCV-ΔVBAT, and IBATSET-ΔI2≤IBAT≤IBATSET+ΔI2, then V is kept firstBOUTIt is constant,
And perform following operate：When determining IBAT>IBATSET-ΔI3When, keep VBOUTIt is constant；When determining IBAT≤IBATSET-ΔI3When, really
Determine VBOUT=V'BOUT+ΔV2；Wherein, Δ I3For positive number；
If it is determined that VCV-ΔVBAT<VBAT<VCV+ΔVBAT, and IBAT>IBATEND, it is determined that VBOUT=V'BOUT-ΔV2。
5. charging circuit as claimed in claim 2, which is characterized in that the voltage-dropping type charging module includes a voltage-dropping type electricity
Lotus pump charging submodule or the voltage-dropping type charge pump charging submodule of more than two series connection.
6. charging circuit as claimed in claim 5, which is characterized in that any voltage-dropping type charge pump charging submodule includes
First switch group, second switch group, the first derided capacitors and the second derided capacitors, any voltage-dropping type charge pump charging
Module for the first control signal issued in response to the control module, opens the first switch group, closes described second
Switching group so that first derided capacitors and the charging of the second derided capacitors, and output voltage size is the described first partial pressure
The direct current of the voltage value of capacitance；And it in response to the second control signal that the control module issues, closes described first and opens
Pass group opens the second switch group so that first derided capacitors and the electric discharge of the second derided capacitors, and output voltage is big
The direct current of the small voltage value for first derided capacitors.
7. charging circuit as claimed in claim 6, which is characterized in that
The parameter information of the charging circuit includes series N, any voltage-dropping type of the voltage-dropping type charge pump charging submodule of series connection
The voltage conversion efficiency of charge pump charging submoduleAnd the input voltage of any voltage-dropping type charge pump charging submodule with
The ratio between output voltageIn it is any one or more；Wherein, N is positive integer more than or equal to 1, i=1,2 ... N；
The control module, specifically for if it is determined that battery voltage value VBATHigher than the first setting voltage threshold VBATTHAnd less than the
Three setting voltage threshold VCV+ΔVBATWhen, determine that the initial output voltage value of the voltage-dropping type modular converter is made in the following ways
For target output voltage valueWherein, the first setting voltage threshold VBATTHLess than the third
Set voltage threshold VCV+ΔVBAT。
8. charging circuit as claimed in claim 2, which is characterized in that Buck charging modules are further included, wherein：
The control module is additionally operable to if it is determined that battery voltage value VBATNot higher than the first setting voltage threshold VBATTHOr battery
Voltage value VBATHigher than the second setting voltage threshold VCV-ΔVBATAnd less than third setting voltage threshold VCV+ΔVBATAnd charging electricity
Flow valuve IBATNot higher than default cut-off charging current value IBATEND, then terminate to the voltage-dropping type modular converter send control signal with
The voltage-dropping type modular converter is kept to close；Wherein, the first setting voltage threshold VBATTHNot higher than the described second setting electricity
Press threshold value VCV-ΔVBAT, Δ VBATFor positive number；
The Buck charging modules, the direct current for being exported to the rectification module are exported after being adjusted to the battery.
9. a kind of electronic equipment, which is characterized in that including any charging circuit of claim 1~8.
10. a kind of wireless charging system, which is characterized in that including any in wireless adapter, battery and claim 1~8
The charging circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710643155.0A CN108233506A (en) | 2017-07-31 | 2017-07-31 | A kind of charging circuit, electronic equipment and wireless charging system |
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|---|---|---|---|
| CN201710643155.0A CN108233506A (en) | 2017-07-31 | 2017-07-31 | A kind of charging circuit, electronic equipment and wireless charging system |
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| CN201710643155.0A Pending CN108233506A (en) | 2017-07-31 | 2017-07-31 | A kind of charging circuit, electronic equipment and wireless charging system |
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