CN108233461A - A kind of charging circuit and terminal device - Google Patents
A kind of charging circuit and terminal device Download PDFInfo
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- CN108233461A CN108233461A CN201710787163.2A CN201710787163A CN108233461A CN 108233461 A CN108233461 A CN 108233461A CN 201710787163 A CN201710787163 A CN 201710787163A CN 108233461 A CN108233461 A CN 108233461A
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Abstract
A kind of charging circuit and terminal device, multimode modular converter and control module including communication connection, the input terminal of multimode modular converter is used to connect with power supply adaptor, output terminal is used to connect with battery module, control module is used to send charging modes control signal to multimode modular converter, multimode modular converter can the circuit structure based on setting, in response to the charging modes control signal switching charging modes received, i.e. a power conversion module can realize charging in many ways, solve the problems, such as that a variety of charging scheme poor compatibilities of existing charging circuit and circuit structure are complicated, under the premise of saving circuit board space and not improving hardware cost, so that device end can support charging in many ways.
Description
Technical field
The present invention relates to charging technique field more particularly to a kind of charging circuits and terminal device.
Background technology
At present, the type of portable terminal on the market is more and more, for example, tablet computer, smart mobile phone etc., these are just
The formula terminal of taking is substantially all using lithium battery power supply.With the continuous promotion of portable terminal configuration and portable terminal pair
The demand and consumption of electricity constantly become larger, and the charging modes of battery are also more and more, for example, based on Buck conversion circuits
Charging modes, charge pump charging modes, high pressure fast charge, low-pressure direct fills, these charging modes correspond to power supply adaptor end
Charging scheme differ widely, therefore various charging schemes compatibility it is poor；In addition, existing charging circuit is more for compatibility
Kind charging modes need to design more set power conversion modules, and which results in the raising of hardware cost and the waves of circuit board space
Take.
Therefore, it is urgent to provide a kind of new charging circuits to solve the above problems.
Invention content
An embodiment of the present invention provides a kind of charging circuit and terminal devices, are filled to solve a variety of of existing charging circuit
The problem of electric scheme poor compatibility and complicated circuit structure.
In a first aspect, an embodiment of the present invention provides a kind of charging circuit, the multimode modular converter including communication connection
And control module, for being connect with power supply adaptor, output terminal is used for and battery mould the input terminal of the multimode modular converter
Block connects, and the control module is used to send charging modes control signal to the multimode modular converter, so that described multi-party
Formula modular converter charges to the battery module with corresponding charging modes, and the multimode modular converter includes multi-party
Formula conversion circuit, wherein：
The multimode conversion circuit includes first switch, second switch, third switch, the 4th switch, the first capacitance mould
Block and the second capacitance module；
The input terminal of the first switch is connect with the power supply adaptor；
The output terminal of the first switch and the input terminal of the second switch and one end of first capacitance module
Connection, one end and the institute of the output terminal of the second switch, the output terminal of third switch and second capacitance module
State battery module connection；
Input terminal that the input terminal of third switch is switched with the described 4th and first capacitance module it is another
End connection；The output terminal of 4th switch and the other end of second capacitance module are grounded；
The control terminal of the first switch, the control terminal of the second switch, the control terminal of third switch and institute
The control terminal of the 4th switch is stated, is respectively used to receive corresponding switch control signal so that the multimode modular converter
Switch to corresponding charging modes.
With reference to first aspect, in the first possible realization method of first aspect, the multimode modular converter also wraps
Switch drive control module is included, wherein：
The switch drive control module, for receiving the charging modes control signal；And according to the charging side
Formula control signal generates switch control signal group；And by each switch control signal of the switch control signal group export to
The control terminal of the corresponding switch of each switch control signal.
The possible realization method of with reference to first aspect the first, in second of possible realization method of first aspect, institute
Switch drive control module is stated, specifically for controlling signal according to the first charging modes, generates first switch control signal group, institute
It states first switch control signal group and includes the first drive signal group and the second drive signal group；
The multimode conversion circuit, specifically in response to the first drive signal group, the first switch is connected
It is switched with the third, turns off the second switch and the 4th switch so that first capacitance module and described second
Capacitance module is connected, and the power supply adaptor is first capacitance module, second capacitance module and the battery mould
Block charges；And in response to the second drive signal group, the second switch and the described 4th is connected and switchs, described in shutdown
First switch and third switch so that first capacitance module is in parallel with second capacitance module, first electricity
Molar block and second capacitance module electric discharge charge to the battery module.
The possible realization method of with reference to first aspect the first, in the third possible realization method of first aspect, institute
Switch drive control module is stated, specifically for controlling signal according to the second charging modes, generates second switch control signal group；
The multimode conversion circuit, specifically for controlling signal group, conducting described first in response to the second switch
Switch and the second switch turn off third switch and the described 4th switch so that the power supply adaptor is described the
Two capacitance modules and the charging battery module.
The possible realization method of with reference to first aspect the first, in the 4th kind of possible realization method of first aspect, institute
Switch drive control module is stated, specifically for controlling signal according to third charging modes, generates third switch control signal group；
The multimode conversion circuit, specifically in response to the third switch control signal group, turning off the third
Switch and the described 4th switch, the partially ON first switch and the second switch so that the first switch and described
The sum of equiva lent impedance of second switch is equal to setting impedance value, and the power supply adaptor passes through the first switch and described second
It switchs as second capacitance module and the charging battery module.
Any possible realization method of second with reference to first aspect~four kind, the 5th kind in first aspect may be real
In existing mode, the control module for communicating with the power supply adaptor, is obtained and is propped up for characterizing the power supply adaptor
The information for the charging modes held；And charging modes are determined as charge pump charging modes according to described information, it is driven to the switch
Dynamic control module sends the charging modes that the first charging modes control signal or determining charging modes are filled for low-pressure direct,
It is linear-charging to send the second charging modes control signal or determining charging modes to the switch drive control module
Mode sends the third charging modes to the switch drive control module and controls signal.
The 5th kind of possible realization method with reference to first aspect, in the 6th kind of possible realization method of first aspect, institute
Control module is stated, is additionally operable to if it is determined that charging modes are linear-charging mode, then according to the output voltage of the power supply adaptor
Difference and the ratio of preset charged current value between value and the voltage value of presently described battery module, determine the setting impedance
Value, alternatively, according to the difference between the output voltage values of the power supply adaptor and default battery module voltages value with currently filling
The ratio of electric current value determines the setting impedance value；And according to the impedance value that sets to the switch drive control module
Send the third charging modes control signal.
With reference to first aspect, any possible realization method of the first of first aspect~four kind, the of first aspect
In seven kinds of possible realization methods, the multimode modular converter includes one or more multimode conversion circuit in parallel.
With reference to first aspect, any possible realization method of the first of first aspect~four kind, the of first aspect
In eight kinds of possible realization methods, the charging circuit further includes Buck modular converters, and the input terminal of the Buck modular converters is used
It is connect in the power supply adaptor, for output terminal for being connect with the battery module, the Buck modular converters include one
Or more than two Buck conversion sub-circuits in parallel；For any Buck conversion sub-circuits, the Buck conversion sub-circuits include
5th switch, the 6th switch, the first inductance and third capacitance module, wherein：
The input terminal of 5th switch is the input terminal of the Buck modular converters, output terminal and the described 6th switch
The first end of input terminal and first inductance connects；
The first end of the output terminal and the third capacitance module of 6th switch is grounded；
The second end of first inductance is connect with the second end of the third capacitance module, and tie point turns for the Buck
Change the mold the output terminal of block；
The Buck modular converters, for when multimode modular converter is closed, charging to the battery module.
Second aspect, the embodiment of the present invention additionally provide a kind of terminal device, including the charging circuit described in first aspect.
The present invention has the beneficial effect that：
An embodiment of the present invention provides a kind of charging circuit and terminal device, the multimode modular converter including communication connection
And control module, for being connect with power supply adaptor, output terminal is used for and battery mould the input terminal of the multimode modular converter
Block connects, and the control module is used to send charging modes control signal to the multimode modular converter, so that described multi-party
Formula modular converter charges to the battery module with corresponding charging modes, and the multimode modular converter includes multi-party
Formula conversion circuit, wherein：The multimode conversion circuit includes first switch, second switch, third switch, the 4th switch, the
One capacitance module and the second capacitance module；The input terminal of the first switch is connect with the power supply adaptor；Described first
The output terminal of switch is connect with the input terminal of the second switch and one end of first capacitance module, the second switch
Output terminal, third switch output terminal and one end of second capacitance module connect with the battery module；Institute
The input terminal for stating third switch is connect with the input terminal of the described 4th switch and the other end of first capacitance module；It is described
The output terminal of 4th switch and the other end of second capacitance module are grounded；It is the control terminal of the first switch, described
The control terminal of second switch, the third switch control terminal and it is described 4th switch control terminal, be respectively used to receive with
Corresponding switch control signal so that the multimode modular converter switches to corresponding charging modes.That is, institute
State the multimode modular converter in charging circuit, can the circuit structure based on setting, in response to control module send charging side
Formula control signal switching charging modes, i.e. a power conversion module can realize charging in many ways, solve existing charging electricity
The problem of a variety of charging scheme poor compatibilities and complicated circuit structure on road, is saving circuit board space and is not improving hardware
Under the premise of cost so that device end can support charging in many ways.
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 charging circuit in the embodiment of the present invention one；
Fig. 2 show another structure diagram of the charging circuit in the embodiment of the present invention one；
Fig. 3 show the first equivalent circuit diagram of the multimode conversion circuit in the embodiment of the present invention one；
Fig. 4 show second of equivalent circuit diagram of the multimode conversion circuit in the embodiment of the present invention one；
Fig. 5 show the third equivalent circuit diagram of the multimode conversion circuit in the embodiment of the present invention one；
Fig. 6 show the 4th kind of equivalent circuit diagram of the multimode conversion circuit in the embodiment of the present invention one；
Fig. 7 show a kind of structure diagram of the multimode conversion circuit in the embodiment of the present invention one；
Fig. 8 show a kind of structure diagram of the multimode modular converter in the embodiment of the present invention one；
Fig. 9 show the yet another construction schematic diagram of the charging circuit in the embodiment of the present invention one；
Figure 10 show a kind of structure diagram of the Buck conversion sub-circuits in the embodiment of the present invention one.
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 one：
The embodiment of the present invention one provides a kind of charging circuit, specifically, as shown in Figure 1, it is the embodiment of the present invention one
Described in charging circuit structure diagram, the charging circuit includes the multimode modular converter 11 that can communicate to connect and control
Module 12, the input terminal of the multimode modular converter 11 with power supply adaptor for connecting, and output terminal is used for and battery module
Connection, the control module 12 is used to send charging modes control signal to the multimode modular converter 11, so that described more
Mode modular converter 11 charges to the battery module with corresponding charging modes, and the multimode modular converter 11 wraps
Multimode conversion circuit 111 is included, wherein：
The multimode conversion circuit 111 include first switch Q1, second switch Q2, third switch Q3, the 4th switch Q4,
First capacitance module C1 and the second capacitance module C2；
The input terminal of the first switch Q1 is connect with the power supply adaptor；
Input terminal and the first capacitance module C1 of the output terminal of the first switch Q1 with the second switch Q2
One end connection, the output terminal of the second switch Q2, the output terminal of third switch Q3 and second capacitance module
One end of C2 is connect with the battery module；
Input terminal and the first capacitance module C1 of the input terminal of the third switch Q3 with the described 4th switch Q4
The other end connection；The output terminal of the 4th switch Q4 and the other end of the second capacitance module C2 are grounded；
The control terminal of the first switch Q1, the control terminal of the second switch Q2, the control terminal of third switch Q3
And the control terminal of the 4th switch Q4, it is respectively used to receive corresponding switch control signal so that the multimode
Modular converter 11 switches to corresponding charging modes；Wherein, each switch control signal corresponding with each switch control terminal
It is signal to be controlled to generate according to the charging modes.
That is, the multimode modular converter 11 in the charging circuit, can the circuit structure based on setting, in response to
The charging modes control signal switching charging modes that control module 12 is sent, i.e. a power conversion module can realize a variety of chargings
Mode solves the problems, such as that a variety of charging scheme poor compatibilities of existing charging circuit and circuit structure are complicated, is saving electricity
Road plate space and under the premise of not improving hardware cost so that device end can support charging in many ways.
It should be noted that the first capacitance module C1 may include a capacitance, may also comprise in a series arrangement or
Multiple capacitances that the mode that parallel way or connection in series-parallel are combined is combined；The second capacitance module C2 may include
One capacitance, may also comprise in a series arrangement or the mode that is combined of parallel way or connection in series-parallel combine it is more
A capacitance, the present embodiment are not limited in any way herein.
Optionally, as shown in Fig. 2, the multimode modular converter 11 may also include switch drive control module 112,
In：
The switch drive control module 112, for receiving the charging modes control signal；And it is filled according to described
Electric mode controls signal to generate switch control signal group；And each switch control signal of the switch control signal group is exported
To the control terminal with each corresponding switch of switch control signal.That is, the switch drive control module 112
It is mainly used for controlling signal according to the charging modes that control module 12 is sent, generates corresponding switch control signal group, drive institute
Each switch in multimode conversion circuit 111 is stated, so that the multimode conversion circuit 111 is carried out with corresponding equivalent structure
Power supply is converted, i.e., is charged with corresponding charging modes to battery module.It below will can to the multimode modular converter 11
The charging modes and operation principle of realization describe in detail.
Mode one：The switch drive control module 112 can be specifically used for controlling signal, production according to the first charging modes
Raw first switch Q1 control signal groups, the first switch Q1 control signals group include the first drive signal group and the second driving letter
Number group；
Correspondingly, the multimode conversion circuit 111 can be specifically used in response to the first drive signal group, conducting
The first switch Q1 and third switch Q3 turns off the second switch Q2 and the 4th switch Q4 so that described the
One capacitance module C1 connects with the second capacitance module C2, and the power supply adaptor is the first capacitance module C1, described
Second capacitance module C2 and the charging battery module；And in response to the second drive signal group, conducting described second
Q2 and the 4th switch Q4 are switched, turns off the first switch Q1 and third switch Q3 so that the first capacitance mould
Block C1 is in parallel with the second capacitance module C2, and the first capacitance module C1 and the second capacitance module C2 electric discharges are to described
Battery module charges.
As shown in the above, charging modes one include two stages：In the first stage, the switch drive control module
112 control signal to generate the first drive signal group according to first charging modes, to control the multimode conversion circuit 111
First switch Q1 and third switch Q3 conducting, second switch Q2 and the 4th switch Q4 shutdown, in this stage, multimode conversion electricity
The equivalent circuit on road 111 is as shown in figure 3, the first capacitance module C1 connects with the second capacitance module C2, power supply adaptor first
Capacitance module C1, the second capacitance module C2 and charging battery module, wherein, RQ1And RQ3Respectively first switch Q1 and third
Switch the conducting resistance of Q3；In second stage, the switch drive control module 112 is controlled according to first charging modes to be believed
Number generate the second drive signal group, with control the second switch Q2 of the multimode conversion circuit 111 and the 4th switch Q4 conducting,
First switch Q1 and third switch Q3 shutdowns, in this stage, the equivalent circuit of multimode conversion circuit 111 is as shown in figure 4, first
Capacitance module C1 is in parallel with the second capacitance module C2, the first capacitance module C1 and the second capacitance module C2 electric discharge to battery module into
Row charging, wherein, RQ2And RQ4The conducting resistance of the switches of respectively second switch Q2 and the 4th Q4.
The switch drive control module 112 is according to described in setting cycle T (can flexibly being set according to actual conditions) transmission
First drive signal group and the second drive signal group, the duration of first stage and the duration of second stage respectively account for described
The 1/2 of cycle T is set, i.e. the charge and discharge duty ratio of the second capacitance module C2 is 50%；Assuming that first switch Q1, second switch
Q2, the conducting resistance of the third switches of switch Q3 and the 4th Q4 are negligible, then the voltage value of the second capacitance module C2 is
The 1/2 of the output voltage values of power supply adaptor, i.e., the output voltage values (electricity of battery module of described multimode conversion circuit 111
Pressure value) for power supply adaptor output voltage values 1/2；Therefore, in charging process, by 2 times of the voltage value of battery module
Be determined as charging the output voltage values of required power supply adaptor, and the output of the power supply adaptor according to needed for determining charging
Voltage value adjusts the output voltage of power supply adaptor, you can realizes and charges to battery module.In practical applications, each switch
There are conducting resistance, the operation principle of the multimode conversion circuit 111 is similar, and details are not described herein for the present embodiment.
It should be noted which kind of charging modes the multimode modular converter 11 specifically can be used to the battery module
It charges, the charging modes supported depending on the power supply adaptor；It is therefore preferred that the control module 12, can have
Body obtains the information for characterizing the charging modes that the power supply adaptor is supported for communicating with the power supply adaptor；
If determine that the power supply adaptor supports charge pump charging modes according to described information, it is determined that charging modes charge for charge pump
Mode, and send first charging modes to the switch drive control module and control signal.
In the present embodiment, charging modes one are referred specifically to for charge pump charging modes.Further optionally, for characterizing
Stating the information for the charging modes that power supply adaptor is supported may include output voltage adjustable range, the power adaptation of power supply adaptor
It is any one or more in the output current adjustable range of device and the identification information of power supply adaptor.
For example, for charge pump charging modes, (i.e. power supply adaptor is defeated for the input voltage value of multimode modular converter 11
Go out voltage value) the often setting several times for the voltage value of battery module, such as 2 times, therefore it is required that the output electricity of power supply adaptor
Press adjustable range larger；And charging process needs to adjust the input voltage value of multimode modular converter 11 in real time, it is therefore desirable to
The adjusting step-length of the output voltage of power supply adaptor is smaller；And then when control module 12 determines the output voltage of power supply adaptor
The upper limit value of adjustable range is not less than 2 times of battery module full charge pressure, and the minimal adjustment of the output voltage of power supply adaptor
When step-length according to actual use demand no more than setting step-length threshold value (can flexibly set, such as 20mV), then the power supply is can determine
Adapter supports charge pump charging modes.
For another example, the identification information of power supply adaptor and the correspondence of charging modes supported, control can be prestored
Module 12 is according to the identification information of the power supply adaptor got, you can determines the charging modes that the power supply adaptor is supported.
In addition, the charging process of terminal device battery module generally comprises tricke phase stage, constant-current phase and constant-voltage phase：
Tricke phase stage, the voltage value of battery module is smaller, and the smaller charging current of generally use carries out preliminary filling to battery module；Work as electricity
After the voltage value of pond module rises to the first setting voltage threshold (can flexibly be set according to actual use demand, such as 2.8V),
Charging process enters constant-current phase, at this time in order to improve charging rate, the larger charging current of generally use, and charging current base
Originally it remains unchanged, the voltage value of battery module is increased with the progress of charging process；When the voltage of battery reaches the second setting
During voltage threshold (can flexibly be set according to actual use demand, such as 4.4V), charging process enters constant-voltage phase, battery module
Voltage value be held essentially constant, charging current is gradually reduced, until be decreased to charge cutoff current value (can pre-set), electricity
The electricity of Chi Mo battery storages in the block reaches actual capacity value, i.e. battery reaches fully charged state, and charging process terminates；Wherein,
First setting voltage threshold is not higher than the second setting voltage threshold.
As shown in the above, (voltage value of battery module is not higher than the first setting voltage for the tricke phase stage of charging process
Threshold value) and constant-voltage phase second half section (voltage value of battery module higher than second setting voltage threshold and charging current value it is small
In setting electric current threshold value) the low current charge stage can be belonged to, (voltage value of battery module is higher than the first setting voltage for constant-current phase
Threshold value and not higher than the second setting voltage threshold) and the front half section of constant-voltage phase (voltage value of battery module is higher than described the
Two setting voltage thresholds and charging current value be not less than setting electric current threshold value) the large current charge stage can be belonged to.
By inductance is not present in multimode conversion circuit 111 in this present embodiment, thus, there is no drawn by inductive element
The fever as caused by the equiva lent impedance of inductive element is also not present in the coil loss and core loss risen；And then with low current
Charging stage is compared, excellent using the transfer efficiency that charge pump charging modes charge to battery module in the large current charge stage
Gesture is more notable；It is therefore preferred that the control module 12, is supported according to described for characterizing the power supply adaptor
The information of charging modes determine that charging modes are high for the voltage value for before charge pump charging modes, being additionally operable to determine battery module
It is higher than described second in the first setting voltage threshold and not higher than the voltage value of the second setting voltage threshold or determining battery module
It sets voltage threshold and charging current value is not less than setting electric current threshold value (can flexibly being set according to actual conditions), wherein, it is described
Setting electric current threshold value is more than charge cutoff current value.
That is, control module 12 can also communicate with battery module, obtain the voltage value of battery module or obtain
The voltage value and charging current value of battery module are taken, according to the charging status information of these battery modules got, determines to work as
The preceding residing charging stage；If it is determined that the large current charge stage (or fast charge stage) is currently at, and power supply adaptor is supported
Charge pump charging modes, it is determined that charging modes are charge pump charging modes, and send institute to the switch drive control module
State the first charging modes control signal；At this point, control module 12 is additionally operable to the voltage value according to battery module, determine needed for charging
Power supply adaptor output voltage values, and communicate with power supply adaptor, control the output voltage of power supply adaptor.
Based on the multimode modular converter 11, charged with charge pump charging modes to battery module, electric energy conversion
It is efficient, be lost and generate heat small, the safety of charge efficiency and terminal device can be improved.
Mode two：The switch drive control module 112 can be specifically used for controlling signal, production according to the second charging modes
Raw second switch Q2 control signal groups；
Correspondingly, the multimode conversion circuit 111 can be specifically used for controlling signal in response to the second switch Q2
The first switch Q1 and the second switch Q2 is connected in group, turns off the third switch Q3 and the 4th switch Q4 so that
The power supply adaptor is the second capacitance module C2 and the charging battery module.
When being charged using charging modes two to battery module, equivalent circuit such as Fig. 5 of multimode conversion circuit 111
Shown, first switch Q1 and second switch Q2 conductings, the third switch Q4 shutdowns of switch Q3 and the 4th, power supply adaptor is the second electricity
Molar block C2 and charging battery module, wherein, RQ1And RQ2The respectively conducting resistance of first switch Q1 and second switch Q2.
Assuming that the conducting resistance of first switch Q1, second switch Q2 are negligible, then the voltage value of battery module is fitted equal to power supply
Orchestration output voltage values；Therefore, in charging process, the output voltage of power supply adaptor is adjusted according to the voltage value of battery module
Value can be realized to charging battery module.In practical applications, there are conducting resistance, the multimode conversion circuits for each switch
111 operation principle is similar, and details are not described herein for the present embodiment.
Similar with charging modes one, the control module 12 available for communicating with the power supply adaptor, is obtained for table
Levy the information for the charging modes that the power supply adaptor is supported；And if the power supply adaptor is determined according to described information
Support the charging modes that fill of low-pressure direct, it is determined that charging modes are the charging modes that low-pressure direct fills, and to the switch drive control
Molding block sends the second charging modes control signal.It should be noted that charging modes two here are referred specifically to for low pressure
The charging modes directly filled.
Similarly, compared with the low current charge stage, in the charging modes pair that the large current charge stage is filled using low-pressure direct
The transfer efficiency advantage that battery module charges is more notable；It is therefore preferred that the control module 12, according to
Information for characterizing the charging modes that the power supply adaptor is supported determines that charging modes are the charging modes that low-pressure direct fills
Before, it is additionally operable to determine the voltage value of battery module higher than the described first setting voltage threshold and not higher than the described second setting electricity
The voltage value of pressure threshold value or determining battery module is set higher than the described second setting voltage threshold and charging current value not less than described
Constant current threshold value.
That is, control module 12 can also communicate with battery module, obtain the voltage value of battery module or obtain
The voltage value and charging current value of battery module are taken, according to the charging status information of these battery modules got, determines to work as
The preceding residing charging stage；If it is determined that the large current charge stage is currently at, and power supply adaptor supports the charging that low-pressure direct fills
Mode, it is determined that charging modes are the charging modes that low-pressure direct fills, and send described second to the switch drive control module
Charging modes control signal；At this point, control module 12 is additionally operable to the voltage value according to battery module, the power supply needed for charging is determined
The output voltage values of adapter, and communicate with power supply adaptor, control the output voltage of power supply adaptor.
It based on the multimode modular converter 11, is charged with the charging modes that low-pressure direct fills to battery module, when
When the conducting resistance of one switch Q1 and second switch Q2 is very low, energy conversion efficiency is also very high, loss and fever also very little,
The safety of charge efficiency and terminal device can be improved.
Mode three：The switch drive control module 112 can be specifically used for controlling signal, production according to third charging modes
Raw third switch Q3 control signal groups；
Correspondingly, the multimode conversion circuit 111 can be specifically used in response to third switch Q3 control signals
Group turns off the third switch Q3 and the 4th the switch Q4, the partially ON first switch Q1 and the second switch Q2,
So that the sum of equiva lent impedance of the first switch Q1 and second switch Q2 is equal to setting impedance value, the power supply adaptor
It is the second capacitance module C2 and the charging battery module by the first switch Q1 and second switch Q2.
When being charged using charging modes three to battery module, equivalent circuit such as Fig. 6 of multimode conversion circuit 111
Shown, first switch Q1 and second switch Q2 are partially ON, the equiva lent impedance R of first switch Q11It is equivalent with second switch Q2
Impedance R2The sum of be equal to R, power supply adaptor by equiva lent impedance R be the second capacitance module C2 and charging battery module；Battery
The voltage value U of moduleout=UIN- IR, wherein, UINFor the output voltage values of power supply adaptor, the output electricity of power supply adaptor
The voltage value that pressure value is stablized for one, such as 5V；I is the charging current value for flowing through the multimode conversion circuit 111, by adjusting
The size of equiva lent impedance R, that is, the equiva lent impedance R of adjustment first switch Q11With the equiva lent impedance R of second switch Q22It is big
It is small, you can to realize constant-voltage charge or constant-current charge.
It is similar with charging modes one and charging modes two, the control module 12, available for leading to the power supply adaptor
Letter, obtains the information for characterizing the charging modes that the power supply adaptor is supported；And if institute is determined according to described information
It states power supply adaptor and supports linear charging modes, it is determined that charging modes are linear-charging mode, and to the switch drive control
Molding block sends the third charging modes control signal.It should be noted that charging modes three here refer specifically to generation linearly
Charging modes.
For example, the control module 12 communicates with power supply adaptor, the output voltage adjustable range of power supply adaptor is obtained,
Determine that power supply adaptor can only export 5V stable voltages, it is determined that power supply adaptor supports linear charging modes, and then really
Charging modes are determined for linear-charging mode.
Due to the input voltage value (output voltage values of power supply adaptor) and output voltage in multimode modular converter 11
When pressure difference between value (voltage value of battery module) is larger, the value of equiva lent impedance R is larger, therefore the loss of circuit shown in Fig. 6
It is larger, transfer efficiency is relatively low；And then linear-charging mode is more suitable for the smaller scene of charging current.It is therefore preferred that institute
Control module 12 is stated, charging side is being determined for characterizing the information for the charging modes that the power supply adaptor is supported according to described
Formula be linear-charging mode before, be additionally operable to determine battery module voltage value not higher than described first setting voltage threshold or
Person determines that the voltage value of battery module is less than the setting electric current threshold higher than the described second setting voltage threshold and charging current value
Value.
That is, control module 12 can also communicate with battery module, obtain the voltage value of battery module or obtain
The voltage value and charging current value of battery module are taken, according to the charging status information of these battery modules got, determines to work as
The preceding residing charging stage；If it is determined that the low current charge stage is currently at, and power supply adaptor supports linear charging modes, then
Charging modes are determined as linear-charging mode, and the third charging modes control letter is sent to the switch drive control module
Number.
Specifically, the control module 12 is if it is determined that the voltage value of battery module sets voltage threshold (tiny stream not higher than first
The stream stage), then it can be according to the output voltage values U of power supply adaptorINThe voltage value of (stationary value of setting), present battery module
Uout(detected value) and preset charged current value I (preset value), using formula Uout=UIN- IR determines impedance value R, and root
Third charging modes control signal is sent to the switch drive control module so that first switch Q1 according to determining impedance value R
Equiva lent impedance and the sum of the equiva lent impedance of second switch Q2 be equal to R.
Control module 12 is if it is determined that the voltage value of battery module is less than higher than the second setting voltage threshold and charging current value
It, then can be according to the output voltage values U of power supply adaptor during setting electric current threshold value (constant-voltage phase second half section)IN(the stabilization of setting
Value), the voltage value U of battery moduleout(preset value) and current charging current value I (detected value), using formula Uout=
UIN- IR determines impedance value R, and sends third charging modes to the switch drive control module according to determining impedance value R
Control signal so that the sum of the equiva lent impedance of first switch Q1 and the equiva lent impedance of second switch Q2 are equal to R.
Above-mentioned three kinds of charging modes are the 11 achievable charging modes of multimode modular converter, it is also necessary to explanation
It is that when in the large current charge stage, and power supply adaptor can not only support charge pump charging modes but also can support what low-pressure direct filled
During charging modes, it is preferable that the control module 12 determines charging modes as charge pump charging modes, to improve electricity as much as possible
It can transfer efficiency.
Optionally, as shown in fig. 7, the multimode conversion circuit 111 may also include the 4th capacitance module C4, the described 4th
The first end of capacitance module C4 is connected with the input terminal of the first switch Q1, second end ground connection, the 4th capacitance module C4
Voltage regulation filtering is carried out available for the output voltage to the power supply adaptor, details are not described herein for the present embodiment.
The 4th capacitance module C4 may include a capacitance, may also comprise in a series arrangement or parallel way or
Multiple capacitances that the mode that connection in series-parallel is combined is combined, the present embodiment are not limited in any way herein.
Optionally as well, the multimode modular converter 11 may include that one or more described multimode in parallel turns
Change circuit 111.Preferably, as shown in figure 8, the multimode modular converter 11 may include the multimode conversion of multiple parallel connections
Circuit 111 to reduce the charging current for flowing through each multimode conversion circuit 111, further reduces in electric energy transfer process
Power attenuation improves transfer efficiency.
Optionally, in addition to being based on the multimode modular converter 11, using three of the above charging modes to battery module into
Other than row charging, as shown in figure 9, the charging circuit may also include Buck modular converters 91, the Buck modular converters 91
Input terminal for connect with the power supply adaptor, output terminal is used to connect with the battery module, the Buck moduluss of conversion
Block 91 is used for when the multimode modular converter 11 is closed, and is charged to the battery module.
Preferably, the control module 12, it may also be used for if it is determined that the voltage value of battery module is set not higher than described first
The voltage value of constant voltage threshold value or determining battery module is less than institute higher than the described second setting voltage threshold and charging current value
Setting electric current threshold value is stated, then the multimode modular converter 11 is controlled to close, and controls the Buck modular converters 91 to described
Battery module charges.That is, in the low current charge stage, multimode modular converter 11 can be closed, is not used above-mentioned
Linear-charging mode but charged based on Buck modular converters 91 to battery module, to ensure low current charge rank as possible
The energy conversion efficiency of section.
Specifically, the Buck modular converters 91 may include one or more Buck conversion sub-circuit in parallel；Needle
To any Buck conversion sub-circuits, as shown in Figure 10, the Buck conversion sub-circuits may include the 5th switch Q5, the 6th switch
Q6, the first inductance L1 and third capacitance module C3, wherein：
The input terminal of the 5th switch Q5 is the input terminal of the Buck modular converters 91, and output terminal is opened with the described 6th
Close the first end connection of the input terminal and the first inductance L1 of Q6；
The first end of the output terminal and the third capacitance module C3 of the 6th switch Q6 is grounded；
The second end of the first inductance L1 is connect with the second end of the third capacitance module C3, and tie point is described
The output terminal of Buck modular converters 91.
It should be noted that the third capacitance module C3 may include a capacitance, may also comprise in a series arrangement or
Multiple capacitances that the mode that parallel way or connection in series-parallel are combined is combined, the present embodiment are not limited in any way herein.
In addition, the Buck conversion sub-circuits are similar with the Buck Switch Charger circuits of the prior art, therefore its
Operation principle and control method do not repeat excessively herein.
Metal-oxide-semiconductor (the Metal Oxide of the prior art can be used in switch drive control module described in the present embodiment
Semiconductor, mos field effect transistor) driving circuit realization；The control module 12 can be used
Application processor in terminal device is realized, the processor specially set in the charging circuit can also be used and realize, this implementation
Example is not limited in any way herein.
Preferably, the first switch Q1, second switch Q2, third switch Q3, the 4th switch Q4, the 5th switch Q5 and
6th switchs Q6 concretely metal-oxide-semiconductors；Optionally, above-mentioned each switch or other switching devices, the present embodiment are not made herein
Any restriction.
In addition, the first capacitance module C1, the second capacitance module C2, the third capacitance mould in the present embodiment
The capacitance of block C3 and the 4th capacitance module C4 can flexibly be set according to actual use demand, and the present embodiment is herein not
It is limited in any way.
It should also be noted that, in embodiments of the present invention, describe for convenience and assume charge cable for perfact conductor,
There is no impedances, therefore, are regarded as the output voltage of power supply adaptor and input voltage (the i.e. multimode conversion of the charging circuit
The input voltage of module 11 or the input voltage of Buck modular converters 91) it is equal；In actual use, determine charging modes it
Before, the control module 12 can also be used to detect the impedance value of charge cable, so that in charging process, it can be according to the impedance
Value determines input voltage value, the charging current of suitable charging current value and the charging circuit according to needed for determining charging
Value and the impedance value determine the output voltage values of power supply adaptor.Detect charge cable impedance value specific method with it is existing
Technology is similar, and details are not described herein for the present embodiment.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of terminal device, including above-mentioned charging circuit.
In conclusion charging circuit provided in an embodiment of the present invention and terminal device, the multimode including communication connection turns
Change the mold block and control module, the input terminal of the multimode modular converter for connect with power supply adaptor, output terminal for
Battery module connects, and the control module is used to send charging modes control signal to the multimode modular converter, so that institute
It states multimode modular converter to charge to the battery module with corresponding charging modes, the multimode modular converter packet
Multimode conversion circuit is included, wherein：The multimode conversion circuit is opened including first switch, second switch, third switch, the 4th
Pass, the first capacitance module and the second capacitance module；The input terminal of the first switch is connect with the power supply adaptor；It is described
The output terminal of first switch is connect with the input terminal of the second switch and one end of first capacitance module, and described second
One end of the output terminal of switch, the output terminal of third switch and second capacitance module connects with the battery module
It connects；The input terminal of the third switch connects with the input terminal of the described 4th switch and the other end of first capacitance module
It connects；The output terminal of 4th switch and the other end of second capacitance module are grounded；The control of the first switch
The control terminal at end, the control terminal of the control terminal of the second switch, the third switch and the 4th switch, is respectively used to
Receive corresponding switch control signal so that the multimode modular converter switches to corresponding charging modes.Also
To say, the multimode modular converter in the charging circuit, can the circuit structure based on setting, in response to control module send
Charging modes control signal switching charging modes, i.e. a power conversion module can realize charging in many ways, solve existing
The problem of a variety of charging scheme poor compatibilities and complicated circuit structure of charging circuit, is saving circuit board space and is not carrying
Under the premise of high hardware cost so that device end can support charging in many ways.
Furthermore, it is necessary to explanation, any number of elements in drawing and description be used to example and it is 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 multimode modular converter and control module including communication connection, it is described multi-party
The input terminal of formula modular converter with power supply adaptor for connecting, and output terminal with battery module for connecting, the control module
For sending charging modes control signal to the multimode modular converter, so that the multimode modular converter is with corresponding
Charging modes charge to the battery module, and the multimode modular converter includes multimode conversion circuit, wherein：
The multimode conversion circuit include first switch, second switch, third switch, the 4th switch, the first capacitance module with
And second capacitance module；
The input terminal of the first switch is connect with the power supply adaptor；
The output terminal of the first switch is connect with the input terminal of the second switch and one end of first capacitance module,
The output terminal of the second switch, one end of the output terminal of third switch and second capacitance module and the battery
Module connects；
The input terminal of the third switch connects with the input terminal of the described 4th switch and the other end of first capacitance module
It connects；The output terminal of 4th switch and the other end of second capacitance module are grounded；
The control terminal of the first switch, the control terminal of the second switch, the control terminal of third switch and described the
The control terminal of four switches, is respectively used to receive corresponding switch control signal so that the multimode modular converter switching
To corresponding charging modes.
2. charging circuit as described in claim 1, which is characterized in that the multimode modular converter further includes switch drive control
Molding block, wherein：
The switch drive control module, for receiving the charging modes control signal；And according to the charging modes control
Signal processed generates switch control signal group；And by each switch control signal of the switch control signal group export to it is described
The control terminal of each corresponding switch of switch control signal.
3. charging circuit as claimed in claim 2, which is characterized in that
The switch drive control module specifically for controlling signal according to the first charging modes, generates first switch control letter
Number group, the first switch control signal group include the first drive signal group and the second drive signal group；
The multimode conversion circuit, specifically in response to the first drive signal group, the first switch and institute is connected
Third switch is stated, turns off the second switch and the 4th switch so that first capacitance module and second capacitance
Block coupled in series, the power supply adaptor are filled for first capacitance module, second capacitance module and the battery module
Electricity；And in response to the second drive signal group, the second switch and the 4th switch, shutdown described first is connected
Switch and third switch so that first capacitance module is in parallel with second capacitance module, the first capacitance mould
Block and second capacitance module electric discharge charge to the battery module.
4. charging circuit as claimed in claim 2, which is characterized in that
The switch drive control module specifically for controlling signal according to the second charging modes, generates second switch control letter
Number group；
Specifically for controlling signal group in response to the second switch, the first switch is connected in the multimode conversion circuit
With the second switch, the third switch and the described 4th switch are turned off so that the power supply adaptor is the described second electricity
Molar block and the charging battery module.
5. charging circuit as claimed in claim 2, which is characterized in that
The switch drive control module specifically for controlling signal according to third charging modes, generates third switch control letter
Number group；
The multimode conversion circuit, specifically in response to the third switch control signal group, turning off the third switch
With the described 4th switch, the partially ON first switch and the second switch so that the first switch and described second
The sum of equiva lent impedance of switch is equal to setting impedance value, and the power supply adaptor passes through the first switch and the second switch
For second capacitance module and the charging battery module.
6. the charging circuit as described in claim 3~5 is any, which is characterized in that
The control module for communicating with the power supply adaptor, obtains what is supported for characterizing the power supply adaptor
The information of charging modes；And charging modes are determined as charge pump charging modes according to described information, to the switch drive control
Molding block sends the charging modes that the first charging modes control signal or determining charging modes are filled for low-pressure direct, to institute
It is linear-charging side to state switch drive control module and send the second charging modes control signal or determining charging modes
Formula sends the third charging modes to the switch drive control module and controls signal.
7. charging circuit as claimed in claim 6, which is characterized in that
The control module is additionally operable to if it is determined that charging modes are linear-charging mode, then according to the defeated of the power supply adaptor
Go out the ratio of the difference and preset charged current value between the voltage value of voltage value and presently described battery module, determine described set
Constant impedance value, alternatively, according to the difference between the output voltage values of the power supply adaptor and default battery module voltages value with
The ratio of present charging current value determines the setting impedance value；And according to the impedance value that sets to the switch drive control
Molding block sends the third charging modes control signal.
8. such as claim 1-5 any one of them charging circuits, which is characterized in that the multimode modular converter includes one
Or more than two multimode conversion circuits in parallel.
9. such as claim 1-5 any one of them charging circuits, which is characterized in that Buck modular converters are further included, it is described
The input terminal of Buck modular converters with the power supply adaptor for connecting, and output terminal with the battery module for connecting, institute
It states Buck modular converters and includes one or more Buck conversion sub-circuit in parallel；For any Buck conversion sub-circuits,
The Buck conversion sub-circuits include the 5th switch, the 6th switch, the first inductance and third capacitance module, wherein：
The input terminal of 5th switch is the input terminal of the Buck modular converters, output terminal and the described 6th input switched
The connection of the first end of end and first inductance；
The first end of the output terminal and the third capacitance module of 6th switch is grounded；
The second end of first inductance is connect with the second end of the third capacitance module, and tie point is the Buck moduluss of conversion
The output terminal of block；
The Buck modular converters, for when multimode modular converter is closed, charging to the battery module.
10. a kind of terminal device, which is characterized in that including any charging circuit of claim 1~9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710787163.2A CN108233461B (en) | 2017-09-04 | 2017-09-04 | Charging circuit and terminal equipment |
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|---|---|---|---|
| CN201710787163.2A CN108233461B (en) | 2017-09-04 | 2017-09-04 | Charging circuit and terminal equipment |
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| CN108233461B (en) | 2024-01-23 |
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