CN105429213B - System, the method that a kind of mobile terminal and its charging current are adjusted - Google Patents
System, the method that a kind of mobile terminal and its charging current are adjusted Download PDFInfo
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- CN105429213B CN105429213B CN201510862956.7A CN201510862956A CN105429213B CN 105429213 B CN105429213 B CN 105429213B CN 201510862956 A CN201510862956 A CN 201510862956A CN 105429213 B CN105429213 B CN 105429213B
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Abstract
The invention belongs to mobile terminal charging technique field, a kind of mobile terminal is provided and its system, method that charging current is adjusted, the system comprises charging interface, pliotron, battery holder, Power Management Unit and baseband processor.Using the technology of this patent, use common charger, under the premise of meeting the maximum power dissipation that the power triode in mobile terminal charging circuit allows, mobile terminal can automatically adjust charging current according to the pressure difference of the collector and emitter on pliotron, be a kind of method for being realized with a low cost safe and efficient charging.
Description
Technical field
It is adjusted the invention belongs to mobile terminal charging technique field more particularly to a kind of mobile terminal and its charging current
System, method.
Background technique
With the continuous development and maturation of the communication technology, mobile terminal is become increasingly popular.In the charging of low and middle-end mobile terminal
In the process, substantially using the mode of this linear-charging of power triode, compared to the switched charge mode of charging IC, function
The advantages of this linear-charging of rate triode is that circuit is simple, at low cost；The disadvantage is that inefficient, the efficiency of loss is converted into heat
Can, cause mobile terminal to overheat.
The interface of the charger of mobile terminal is substantially uniform at present, but charger is many kinds of.Some are that high pressure is filled
Electric appliance, output voltage are adjustable；Some are the chargers of self performance less stable, output voltage may deviate normal value compared with
Greatly, when user is given using such charger and charged using the mobile terminal of this linear-charging of power triode, charger is defeated
Brownout out may cause during the charging process and charge slowly, and the charging time is too long；More fatal, output voltage is excessively high
When, it may cause the even entire mobile terminal of pliotron during the charging process and overloaded cause thermal damage, so that mobile terminal
Repair rate increases.
By the way of this linear-charging of power triode, the efficiency of charging is with charger output voltage and battery electricity
What the pressure difference of pressure was inversely proportional, optimal charging current is to adjust electric current according to the pressure difference of charger output voltage and cell voltage
Size, but now use this charging circuit of pliotron mobile terminal, charging current be substantially it is constant, cannot adjust
Whole, in this way when the pressure difference on pliotron is excessive, pliotron can face the risk for overloading cause thermal damage, when power three
When pressure difference in pole pipe is too small, and the mobile terminal charging time can be caused too long because charging current is too small.
Summary of the invention
Technical problem to be solved by the present invention lies in provide it is a kind of adjust mobile terminal charging current method and system,
The charging current of mobile terminal can be adjusted according to the pressure difference of the output voltage of charger and rechargeable battery voltage, to solve
Pressure difference is excessive when charging causes pliotron to overload cause thermal damage, and pressure difference is too small to lead to charging time too long problem.
The invention is realized in this way a kind of system for adjusting mobile terminal charging current, including charging interface, power three
Pole pipe, the battery holder for connecting rechargeable battery, Power Management Unit and baseband processor；
The charging interface is used to connect external charger, fills charger to mobile terminal by the charging interface
Electricity；
The base stage of the pliotron connects the Power Management Unit, and collector connects the battery holder, emitter
Connect the charging interface；
The Power Management Unit is used to detect the output voltage and the rechargeable battery voltage of the charger, and handle
Testing result is transferred to the baseband processor；
The baseband processor be used for according to the testing result calculate the charger output voltage and it is described can
The pressure difference of charged battery voltage, and pressure difference generates a control signal for carrying current regulation amplitude accordingly, and by the control
Signal is sent to the Power Management Unit, by the Power Management Unit by control the pliotron base current come
Realize the adjusting of charging current.
Further, the system for adjusting mobile terminal charging current further includes a current sampling resistor, three pole
The collector of pipe is connect by the current sampling resistor with battery holder；
The Power Management Unit is specifically used for: detecting output voltage, the rechargeable battery voltage of the charger
And the voltage at the current sampling resistor both ends, and testing result is transmitted to the baseband processor；
The baseband processor is specifically used for: according to the output voltage and rechargeable battery electricity for detecting the charger
The testing result of pressure calculates the output voltage of the charger and the pressure difference of the rechargeable battery voltage, and pressure difference produces accordingly
Raw one carries the control signal of current regulation amplitude, and the control signal is sent to the Power Management Unit, by institute
Power Management Unit is stated by controlling the pliotron base current to adjust charging current, then according to the detection electricity
The testing result of sampling resistor both end voltage and the resistance value of the current sampling resistor are flowed, actual charging current is calculated,
And charging current corresponding with preset pressure compares, then comparison result generates the control for carrying current regulation amplitude accordingly
Then the control signal is sent to the Power Management Unit by signal, passed through described in control as the Power Management Unit
Pliotron base current adjusts charging current, be repeatedly detected the current sampling resistor both end voltage and adjust the reality
Border charging current, until the actual charge current reaches charging current value corresponding with preset pressure.
Further, the Power Management Unit is built in the baseband processor.
The present invention also provides a kind of mobile terminals, including the system just like above-mentioned adjusting mobile terminal charging current.
The present invention also provides a kind of methods for adjusting mobile terminal charging current, comprising the following steps:
(1) charger insertion has been detected whether；
(2) if having detected charger insertion, the output voltage and the chargeable electricity of the charger are further detected
Cell voltage, and testing result calculates the output voltage of the charger and the pressure difference of the rechargeable battery voltage accordingly；
(3) according to the size of the pressure difference and the corresponding relationship of preset pressure difference and charging current, by mobile terminal tune
Section extremely charges under corresponding charging current.
Further, the step (1), (2), (3) execute under the off-mode that mobile terminal communication system is closed；
Further include following step between step (1) and step (2): mobile terminal enters AP starting up's process, and the AP booting is opened
Dynamic process is only to start the process of Mobile terminal charging system；
The step (3) specifically: closed according to the size of the pressure difference and preset pressure difference are corresponding with charging current
System, start Mobile terminal charging system under the off-mode, by mobile terminal be adjusted under corresponding charging current into
Row charging.
Further, the step (1), (2), (3) execute under the open state of mobile terminal；
The step (3) specifically: closed according to the size of the pressure difference and preset pressure difference are corresponding with charging current
System, directly initiates Mobile terminal charging system, mobile terminal is adjusted to and is charged under corresponding charging current.
Further, the step (3) executes during pulse constant current charges.
Further, the step (2) specifically:
If having detected charger insertion, further during mobile terminal enters pulse constant current charging, each
The output voltage of charger described in the gap detection of pulse charge and the rechargeable battery voltage, and testing result calculates accordingly
The pressure difference of the output voltage of the charger and the rechargeable battery voltage out.
Further, the step (2) specifically:
If having detected charger insertion, further during mobile terminal enters pulse constant current charging, each
The output voltage of charger described in the gap repeated detection of pulse charge and the rechargeable battery voltage, and testing result accordingly
Repeatedly calculate the output voltage of the charger and the pressure difference of the rechargeable battery voltage, and by calculated multiple pressure differences
The magnitude of pressure differential that is detected as this time of mean value.
Compared with prior art, the present invention beneficial effect is: technology of the invention is used, using common charger,
Under the premise of meeting the maximum power dissipation that the power triode in mobile terminal charging circuit allows, according to the output of charger electricity
It presses with the pressure difference of rechargeable battery voltage and automatically adjusts charging current, in the case where low cost, may be implemented safe and efficient
Charging.
Detailed description of the invention
Fig. 1 is the structure principle chart for the adjusting mobile terminal charging current system that one embodiment of the invention provides.
Fig. 2 be another embodiment of the present invention provides adjusting mobile terminal charging current system structure principle chart.
Fig. 3 is the flow chart provided in an embodiment of the present invention for adjusting mobile terminal charging current method.
Fig. 4 is the comparative diagram of the corresponding relationship of preset pressure difference provided in an embodiment of the present invention and charging current.
Fig. 5 is provided in an embodiment of the present invention under open state, adjusts the flow chart of mobile terminal charging current method.
Fig. 6 be it is provided in an embodiment of the present invention in the power-offstate, adjust mobile terminal charging current method flow chart.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, a kind of system for adjusting mobile terminal charging current provided by the invention, including charging interface 1, function
Rate triode 2, battery holder 3, baseband processor 4, Power Management Unit 41, master controller 42 and current sampling resistor 5.
Charging interface 1 is used to connect external charger, fills charger to mobile terminal by the charging interface 1
Electricity.
The base stage of pliotron 2 connects the Power Management Unit 41 in the baseband processor 4；Collector respectively with institute
Battery holder 3 is stated to be connected with the Power Management Unit 41 in the baseband processor 4, emitter respectively with the charging interface 1
It is connected with the Power Management Unit 41 in the baseband processor 4.Pliotron 2 is for controlling charging current, originally
It is the positive-negative-positive pliotron of TSOP-6 encapsulation used in invention, the big function of other encapsulation such as PDFN3x2-8L can also be used
Rate triode.
Battery holder 3 is used for the rechargeable battery of holding movable terminal.
Power Management Unit 41 in baseband processor 4 is used to detect the output voltage of the charger at 1. place and 2.
The rechargeable battery voltage is detected at place, and the result detected is transferred in the master controller 42 in baseband processor 4.
Master controller 42 in baseband processor 4 is used to calculate the output electricity of the charger according to the testing result
The pressure difference of pressure and the rechargeable battery voltage, and pressure difference generates a control signal for carrying current regulation amplitude accordingly, and
The control signal is sent to Power Management Unit 41, by Power Management Unit 41 by controlling the pliotron base stage
Electric current realizes the adjusting of charging current.
In the above-described embodiments, the system for adjusting mobile terminal charging current can also further comprise a current sampling resistor
5；Current sampling resistor 5 is that a power is bigger and the precision resistance of resistance value very little, and resistance value is generally in 0.1 Ω hereinafter, three
The collector of pole pipe 2 is connected by current sampling resistor 5 with battery holder 3；
At this point, Power Management Unit 41 is specifically used for: detecting the output voltage of the charger, in 2. place's detection at 1. place
2. and 3. the rechargeable battery voltage and locating the voltage at 5 both ends of current sampling resistor, and testing result is transferred to base
In master controller 42 in provided with processor 4；
Master controller 42 in Base-Band Processing utensil 4 is specifically used for: according to the output voltage and institute for detecting the charger
The testing result for stating rechargeable battery voltage calculates the output voltage of the charger and the pressure of the rechargeable battery voltage
Difference, and pressure difference generation one carries the control signal of current regulation amplitude accordingly, and the control signal is sent to power supply pipe
Unit 41 is managed, adjusts charging current by controlling the base current of pliotron 2 by Power Management Unit 41, then basis
The testing result of 5 both end voltage of current sampling resistor and the resistance value of current sampling resistor 5 are detected, actual charging electricity is calculated
Stream, and charging current corresponding with preset pressure compares, and comparison result generates the control for carrying current regulation amplitude accordingly
Signal processed, and the control signal is sent to Power Management Unit 41, control three pole of power is passed through by Power Management Unit 41
2 base current of pipe adjusts charging current, is repeatedly detected current sampling resistor 5 both end voltage and adjusts the practical charging electricity
Stream, until the actual charge current reaches charging current value corresponding with preset pressure.
In the above-described embodiments, Power Management Unit 41 is built in baseband processor 4.In this case, due to electricity
It passes by concentration, mobile terminal is easy to cause to damage because of overheat.Therefore, as another embodiment of the invention, such as Fig. 2 institute
Show, Power Management Unit 41 or an individual IC unit independently of baseband processor 4.Mobile end in the present invention
The overall process for holding charging, temporally can substantially be divided into three phases:
1. the process of pre-charging stage, pre-charging stage is very short, the mode of trickle charge, electric current very little are mostly used.
2. constant-current charging phase.
3 constant voltage charging phases, constant voltage charging phase are when cell voltage reaches certain value, and charging current is described at this time
Slowly become smaller on the basis of the charging current value of systemic presupposition, until charging complete.
Pre-charging stage and the charging current in the two stages of constant voltage charging phase are all relatively small, so basic do not have to control
System.The method that mobile terminal charging current is adjusted described in this patent refers to the electricity adjusted in second stage constant-current charging phase
Stream realizes safe and efficient charging.
As shown in figure 3, being a kind of flow chart for adjusting mobile terminal charging current method provided by the invention, including following
Step:
(1) charger insertion has been detected whether；
(2) if having detected charger insertion, the output voltage and the chargeable electricity of the charger are further detected
Cell voltage, and testing result calculates the output voltage of the charger and the pressure difference of the rechargeable battery voltage accordingly；
(3) according to the size of the pressure difference and the corresponding relationship of preset pressure difference and charging current, by mobile terminal tune
Section extremely charges under corresponding charging current.
Process described in above-mentioned steps (3) needs output voltage and the chargeable electricity by presetting the charger
The corresponding relationship of the size of the pressure difference of cell voltage and charging current realizes, as shown in Figure 4.For example, we can be by the pressure difference
It is divided into three sections, the pressure difference in each section corresponds to a charging current, when the pressure difference falls into a section,
Such as section A, B, C, the baseband processor will calculate output voltage and the institute of the charger according to the testing result
The pressure difference of rechargeable battery voltage is stated, and pressure difference generates a control signal for carrying current regulation amplitude accordingly, such as
Pressure difference falls into the case where section A, and control signal may make that charging current is adjusted to a, and described in the control signal is sent to
Power Management Unit is adjusted charging current by controlling the pliotron base current by the Power Management Unit
To corresponding value.It will be clear that in practical applications, the range in the pressure difference section can be according to practical application
It needs to make and adjust accordingly；It can be adjusted to less section as needed, more sections can also be subdivided into.
The charging process of above-mentioned steps (3) is by the way of pulse constant current charging.When using this charging modes, the step
Suddenly (2) specifically: if having detected charger insertion, further during mobile terminal enters pulse constant current charging,
The output voltage of the gap detection charger of each pulse charge and the rechargeable battery voltage, and testing result calculates accordingly
The pressure difference of the output voltage of the charger and the rechargeable battery voltage out.
In actual detection process, in order to increase the precision of detection, error is reduced, the repeatedly charger can detected
Output voltage and the rechargeable battery voltage pressure difference after be averaged, the step (2) specifically:
If having detected charger insertion, further during mobile terminal enters pulse constant current charging, each
The output voltage of charger described in the gap repeated detection of pulse charge and the rechargeable battery voltage, and testing result accordingly
Repeatedly calculate the output voltage of the charger and the pressure difference of the rechargeable battery voltage, and by calculated multiple pressure differences
The magnitude of pressure differential that is detected as this time of mean value.
As shown in figure 5, when mobile terminal is inserted into charger under normal boot-strap state, with the output voltage of charger with
The pressure difference of rechargeable battery voltage is divided into for three sections the method for illustrating to adjust mobile terminal charging current, this method packet
Include following steps:
(1) charger insertion has been detected whether；
(2) if having detected charger insertion, the output voltage and the chargeable electricity of the charger are further detected
Cell voltage, and testing result calculates the output voltage of the charger and the pressure difference of the rechargeable battery voltage accordingly；
(3) judge whether the calculated pressure difference is less than A or is greater than B.
(4) it charges at the middle-grade charging current M of the systemic presupposition if it is not, being then adjusted to mobile terminal.
(5) if so, whether the pressure difference that judgement detects is less than A.
(6) it charges at the low-grade charging current L of the systemic presupposition if it is not, being then adjusted to mobile terminal.
(7) it charges at the high-grade charging current H of the systemic presupposition if so, being adjusted to mobile terminal.
(8) judge whether charging has entered constant-voltage charge process.
(9) if so, charging current slowly becomes smaller, until charging complete.
(10) if it is not, then returning to output voltage and rechargeable battery electricity that step (2) continues to test the charger
Pressure.
As shown in fig. 6, equally by taking pressure difference is divided into three sections as an example, when mobile terminal is inserted into charger in the power-offstate
When, step need to be added between step (1) and step (2): mobile terminal enters AP starting up's process.
A described in above-mentioned steps and B is the output voltage of the charger and the pressure difference of the rechargeable battery voltage,
A is less than B.
The charging current of systemic presupposition described in above-mentioned steps is divided into third gear: high-grade charging current H, middle-grade charging current
M and low-grade charging current L.
AP starting up process described in above-mentioned steps is the process for only starting Mobile terminal charging system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of system for adjusting mobile terminal charging current, which is characterized in that including charging interface, pliotron, be used for
Connect battery holder, Power Management Unit and the baseband processor of rechargeable battery；
The charging interface is used to connect external charger, and charger is made to charge by the charging interface to mobile terminal；
The base stage of the pliotron connects the Power Management Unit, and collector connects the battery holder, emitter connection
The charging interface；
The Power Management Unit is used to detect the output voltage and the rechargeable battery voltage of the charger, and detection
As a result it is transferred to the baseband processor；
The baseband processor be used to be calculated according to the testing result output voltage of the charger with it is described chargeable
The pressure difference of cell voltage, and pressure difference generates a control signal for carrying current regulation amplitude accordingly, and by the control signal
It is sent to the Power Management Unit, is realized by the Power Management Unit by controlling the pliotron base current
The adjusting of charging current；
The Power Management Unit is built in the baseband processor or the Power Management Unit and the baseband processor
Connection side by side.
2. adjusting the system of mobile terminal charging current as described in claim 1, which is characterized in that the adjusting mobile terminal
The system of charging current further includes a current sampling resistor, and the collector of the pliotron passes through the current sampling resistor
It is connect with battery holder；
The Power Management Unit is specifically used for: detect the output voltage of the charger, the rechargeable battery voltage and
The voltage at the current sampling resistor both ends, and testing result is transmitted to the baseband processor；
The baseband processor is specifically used for: according to the output voltage and the rechargeable battery voltage for detecting the charger
Testing result calculates the output voltage of the charger and the pressure difference of the rechargeable battery voltage, and pressure difference generates one accordingly
The control signal of current regulation amplitude is carried, and the control signal is sent to the Power Management Unit, by the electricity
Source control unit adjusts charging current by controlling the pliotron base current, is then adopted according to the detection electric current
The testing result of sample resistance both end voltage and the resistance value of the current sampling resistor, calculate actual charging current, and with
The corresponding charging current of preset pressure compares, and then comparison result generates the control letter for carrying current regulation amplitude accordingly
Number, the control signal is then sent to the Power Management Unit, by the Power Management Unit by controlling the function
Rate transistor base electric current adjusts charging current, be repeatedly detected the current sampling resistor both end voltage and adjust the reality
Charging current, until the actual charge current reaches charging current value corresponding with preset pressure.
3. a kind of mobile terminal, including a system as claimed in claim 1 or 2 for adjusting mobile terminal charging current.
4. a kind of method for adjusting mobile terminal charging current, which is characterized in that be applied to as claimed in claim 3 mobile whole
End, it is described adjust mobile terminal charging current method the following steps are included:
(1) charger insertion has been detected whether；
(2) if having detected charger insertion, the output voltage and rechargeable battery voltage of the charger are further detected, and
Testing result calculates the output voltage of the charger and the pressure difference of the rechargeable battery voltage accordingly；
(3) according to the size of the pressure difference and the corresponding relationship of preset pressure difference and charging current, mobile terminal is adjusted to
It charges under corresponding charging current；
The method also includes following steps:
Judge whether charging enters constant-voltage charge process, however, it is determined that enter constant-voltage charge process, then control current charging current and press
It is gradually become smaller according to preset reduction rule, until charging complete；
The method also includes following steps:
Judge whether charging is pre-charge process, if pre-charge process, then uses trickle charge mode.
5. as claimed in claim 4 adjust mobile terminal charging current method, which is characterized in that the step (1), (2),
(3) it is executed under the off-mode that mobile terminal communication system is closed；It further include following between step (1) and step (2)
Step: mobile terminal enters AP starting up's process, and the AP starting up process is only to start Mobile terminal charging system
Process；
The step (3) specifically: according to the size of the pressure difference and the corresponding relationship of preset pressure difference and charging current,
Start Mobile terminal charging system under the off-mode, mobile terminal is adjusted to and is filled under corresponding charging current
Electricity.
6. as claimed in claim 4 adjust mobile terminal charging current method, which is characterized in that the step (1), (2),
(3) it is executed under the open state of mobile terminal；
The step (3) specifically: according to the size of the pressure difference and the corresponding relationship of preset pressure difference and charging current, directly
Starting Mobile terminal charging system is connect, mobile terminal is adjusted to and is charged under corresponding charging current.
7. adjusting the method for mobile terminal charging current as claimed in claim 4, which is characterized in that the step (3) is in arteries and veins
It is executed during rushing constant-current charge.
8. adjusting the method for mobile terminal charging current as claimed in claim 7, which is characterized in that the step (2) is specific
Are as follows:
If having detected charger insertion, further during mobile terminal enters pulse constant current charging, in each pulse
The output voltage of charger described in the gap detection of charging and the rechargeable battery voltage, and testing result calculates institute accordingly
State the output voltage of charger and the pressure difference of the rechargeable battery voltage.
9. adjusting the method for mobile terminal charging current as claimed in claim 8, which is characterized in that the step (2) is specific
Are as follows:
If having detected charger insertion, further during mobile terminal enters pulse constant current charging, in each pulse
The output voltage of charger described in the gap repeated detection of charging and the rechargeable battery voltage, and testing result is multiple accordingly
Calculate the output voltage of the charger and the pressure difference of the rechargeable battery voltage, and by the equal of calculated multiple pressure differences
The magnitude of pressure differential that value is detected as this time.
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| CN201510862956.7A CN105429213B (en) | 2015-11-30 | 2015-11-30 | System, the method that a kind of mobile terminal and its charging current are adjusted |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105790360B (en) * | 2016-04-11 | 2020-03-24 | 联想(北京)有限公司 | Charging circuit, electronic device, and information processing method |
| CN107706955A (en) * | 2016-08-09 | 2018-02-16 | 中兴通讯股份有限公司 | Terminal charging device and method |
| CN106786843B (en) * | 2016-11-24 | 2019-09-20 | 惠州Tcl移动通信有限公司 | A kind of method of adjustment and system, electric terminal of charging current |
| WO2020097918A1 (en) * | 2018-11-16 | 2020-05-22 | 深圳市欢太科技有限公司 | Method and device for adjusting charge current, and terminal and computer-readable storage medium |
| CN116699296B (en) * | 2023-08-08 | 2023-10-31 | 辰芯半导体（深圳）有限公司 | Load detection circuit and electronic device |
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