CN103269106A - Charging method for setting charging current automatically and mobile terminal - Google Patents
Charging method for setting charging current automatically and mobile terminal Download PDFInfo
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- CN103269106A CN103269106A CN2013102130170A CN201310213017A CN103269106A CN 103269106 A CN103269106 A CN 103269106A CN 2013102130170 A CN2013102130170 A CN 2013102130170A CN 201310213017 A CN201310213017 A CN 201310213017A CN 103269106 A CN103269106 A CN 103269106A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a charging method for setting a charging current automatically and a mobile terminal. The charging method comprises the following steps: a. a default charging current value of the mobile terminal is preset, the preset value is added gradually by a preset current increment to obtain a trial charging current of a charger of the mobile terminal, and the mobile terminal is charged on trial according to the trial charging current; b. the output voltage of the charger is judged whether to be smaller than a preset voltage threshold value when one preset current increment is added to the preset charging current; c. one current increment is subtracted from the current trial charging current value when the output voltage is judged to be smaller than the preset voltage threshold value, the obtained value is set as a standard charging current, and the mobile terminal is charged with the standard current. By means of the charging method for setting the charging current automatically, the mobile terminal can be charged with various USB chargers safely and effectively.
Description
Technical field
The present invention relates to portable terminal charging application, in particular a kind of charging method and portable terminal that charging current is set automatically.
Background technology
Along with unitizing of charger for mobile phone interface, present most of mobile phone and mobile hand-held device are all supported the charger of USB interface.Though be unified at interface, the charging current of charger has nothing in common with each other.And also can't identify different chargers at present at the mobile phone end, the charging current of mobile phone end setting all is the same, can have problems so in actual use.
In charging process, central processing unit arranges a fixing charging current to power management chip, thereby power management chip obtains this fixed current from the VBUS pin of USB, because portable terminal is not known the parameter of charger, therefore when portable terminal does not use the standard configuration charger, may there be the charging current of portable terminal setting and the unmatched situation of charging current of charger the best.
For example, when the mobile phone end is set to the charging current of 1.5A, and the user uses the charger of 500mA to give this cell-phone charging, probably causes charger to be damaged, finally may be accidents caused.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, above-mentioned defective at prior art, a kind of charging method and portable terminal that charging current is set automatically is provided, make portable terminal can identify the optimal charge electric current of USB charger automatically by this method, thereby make portable terminal can use various USB chargers safely, efficiently.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A kind of charging method that charging current is set automatically wherein, comprises step:
A, the preset value of portable terminal acquiescence charging current is set, progressively increases described preset value obtaining the trial charging electric current of portable terminal charger with default current increment, and give described portable terminal trial charging with described trial charging electric current; And current increment of every increase just judges that whether the output voltage of charger is less than default threshold voltage;
B, when judging described output voltage less than default threshold voltage, then deduct a described current increment value obtaining accurate charging current with the current trial charging current value of portable terminal charger, and with this accurate charging current described portable terminal charged.
The described charging method that charging current is set automatically, wherein, described steps A specifically comprises:
A11, the preset value I of portable terminal acquiescence charging current is set
1
A12, the current increment I to preset
0Progressively increase the preset value I of described charging current
1To obtain the trial charging electric current I of portable terminal charger
n
A13, obtain the output voltage of portable terminal charger;
A14, judge that described output voltage is whether less than default threshold voltage; When being, then enter step B, i.e. accurate charging current I to obtain
n-I
0Portable terminal is charged; When not, then enter steps A 15;
A15, circulation described steps A 12 be to A14, during less than default threshold voltage, then enters step B until the output voltage of judging the portable terminal charger.
The described charging method that charging current is set automatically, wherein, the preset value I of acquiescence charging current in the described steps A 11
1Be 400mA, current increment I in the described steps A 12
0Be 100mA.
The described charging method that charging current is set automatically, wherein, the threshold voltage in the described steps A 14 is 4.75V.
The described charging method that charging current is set automatically, wherein, in described steps A, described portable terminal obtains described trial charging electric current and the accurate charging current of charger by the VBUS pin of charger USB interface.
The described charging method that charging current is set automatically, wherein, in described steps A, described portable terminal obtains the output voltage of charger by the VBUS pin of charger USB interface.
A kind of portable terminal that charging current is set automatically wherein, comprising:
Charging current arranges module, be used for arranging the preset value of portable terminal acquiescence charging current, progressively increase described preset value obtaining the trial charging electric current of portable terminal charger with default current increment, and the instruction of obtaining with judge module according to output voltage deducts a described current increment value to obtain accurate charging current with the current trial charging current value of portable terminal charger;
The charging current acquisition module obtains trial charging electric current and accurate charging current for the setting that module is set according to charging current from the portable terminal charger;
Charging module, the user gives the portable terminal trial charging according to the trial charging electric current that the charging current acquisition module obtains, and charges to portable terminal according to the accurate charging current that the charging current acquisition module obtains;
Output voltage obtains and judge module, is used for obtaining the output voltage of charger, and just judges that when charging current arranges module current increment of every increase on the basis of charging current preset value whether the output voltage of charger is less than default threshold voltage; When being, then controlling charging current and module is set obtains accurate charging current; When not, then control charging current and module is set continues progressively to increase described preset value to obtain the trial charging electric current of portable terminal charger with default current increment.
Described portable terminal, wherein, described charging current arranges module and comprises:
The charging current preset value arranges the unit, is used for arranging portable terminal acquiescence charging current preset value I
1
The trial charging electric current arranges the unit, is used for default current increment I
0Progressively increase described preset value I
1To obtain the trial charging electric current I of portable terminal charger
n
Accurate charging current arranges the unit, is used for deducting a described current increment value to obtain accurate charging current with the current trial charging current value of portable terminal charger, and namely the accurate charging current of Huo Deing is I
n-I
0
Described portable terminal, wherein, described charging current preset value is 400mA, and described current increment is 100mA, and described threshold voltage is 4.75V.
Described portable terminal, wherein, described charging current acquisition module obtains described trial charging electric current and accurate charging current by the VBUS pin of charger USB interface;
Described output voltage obtains the output voltage that obtains charger with judge module by the VBUS pin of charger USB interface.
A kind of charging method and portable terminal that charging current is set automatically provided by the present invention is because this method can be with default current increment I
0Progressively increase the preset value I of described charging current
1To obtain the trial charging electric current I of portable terminal charger
n, until the output voltage of the portable terminal charger that gets access to during less than default threshold voltage, with accurate charging current I
n-I
0Battery of mobile terminal is charged, thereby make portable terminal can identify the optimal charge electric current of USB charger automatically, and then make portable terminal can use various USB chargers safely, efficiently, improve the fail safe of charging, avoided the infringement of charger and the generation of security incident.
Description of drawings
Fig. 1 is the flow chart of the preferred embodiment of a kind of charging method that charging current is set automatically provided by the invention.
Fig. 2 is the preferred embodiment flow chart of steps of obtaining charging current provided by the invention.
Fig. 3 is the preferred embodiment functional block diagram of a kind of portable terminal provided by the present invention.
Fig. 4 is the preferred embodiment functional block diagram that the charging current of portable terminal provided by the present invention arranges module.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, clear and definite, below develop simultaneously with reference to accompanying drawing that the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
See also Fig. 1, Fig. 1 is the flow chart of the preferred embodiment of a kind of charging method that charging current is set automatically provided by the invention.
Namely when charger inserts portable terminal, the preset value of charging current is set automatically by the central processing unit of portable terminal.
In step 102, the method of obtaining the trial charging electric current is that the central processing unit by portable terminal sets in advance one than the current increment of subsection, and progressively increase the preset value of described charging current with this default current increment, obtaining the trial charging electric current, when the central processing unit of portable terminal is judged output voltage less than default threshold voltage till; Namely as long as the central processing unit of portable terminal is not judged the portable terminal output voltage less than default threshold voltage, then portable terminal will be with default current increment I
0Progressively increase the preset value of described charging current, and then obtain new trial charging electric current;
Wherein, in this preferred embodiment, portable terminal charges by the charger that has USB interface, USB(Universal Serial BUS, USB) be a kind of widely used interface, it mainly is made up of four line VBUS, D+, D-, GND, and wherein VBUS is power line, D+, D-are used for data communication, and GND is ground wire;
In step 102, described portable terminal obtains the trial charging electric current I of charger by the VBUS pin of charger USB interface
nIn step 103, described portable terminal obtains the output voltage of charger by the VBUS pin of charger USB interface.
Namely work as output voltage less than default threshold voltage, illustrate that then this trial charging electric current meets the demands, portable terminal obtains the accurate charging current of charging to portable terminal according to this trial charging electric current by step 105;
When output voltage more than or equal to threshold voltage, illustrate that then this trial charging electric current does not meet the demands, then need to return step 102 and reset the trial charging electric current, when the trial charging electric current that obtains meets the demands till;
Wherein, definite method of described threshold voltage is; If the charging current that portable terminal obtains from the VBUS pin is in the charger allowed band, then the output voltage that obtains from the VBUS pin will maintain between the 4.75V to 5.25V, if the charging current that portable terminal obtains from the VBUS pin is greater than in the charger allowed band, then the charging voltage of obtaining from the VBUS pin will be dragged down, namely less than 4.75V;
Be and make charging current that portable terminal obtains in the scope that charger allows, then the threshold voltage in the step 104 is set to 4.75V;
Wherein, concrete parameter derives from [YD/T 1591-2009] " power source of mobile communication terminal adapter and charging/data interface techniques requires and method of testing " that the Ministry of Industry and Information Technology of the People's Republic of China (PRC) issued in 2009.
Be how to obtain charging current to elaborate below in conjunction with the present invention of Fig. 2, wherein, Fig. 2 is the preferred embodiment flow chart of steps of obtaining charging current provided by the invention.
Be the preset value I that the central processing unit of portable terminal sets in advance charging current
1, and according to the preset value I of this charging current
1The trial charging electric current I of portable terminal is set
nUnder initial situation, I is set
n=I
1=400mA;
It resets charging current I
nConcrete grammar be, with default current increment I
0Progressively increase the preset value I of described charging current
1To obtain the trial charging electric current I of portable terminal charger
n
Wherein, in this preferred embodiment, I
0Be 100mA; Namely at first judge the trial charging electric current I
n=I
n+ I
0Whether=400mA+ 100mA=500 mA satisfies portable terminal to the requirement of trial charging electric current; If 500 mA do not satisfy portable terminal to the requirement of trial charging electric current, then reset the trial charging electric current I
n=I
n+ I
0=500 mA+100mA=600 mA; Namely as long as the trial charging electric current does not satisfy the requirement of portable terminal, then on the basis of the preceding trial charging electric current that once obtains, increase the current increment I of a unit again
0=100mA, and then reset the trial charging electric current, when the trial charging electric current that arranges meets the demands till.
Wherein, by the ADC(Analog-to-Digital Converter of portable terminal power management chip, analog to digital converter) obtain the output voltage on the USB interface VBUS pin;
Namely work as I
nDuring=500 mA, if output voltage during more than or equal to threshold voltage, then returns step 202 and resets the trial charging electric current; And obtain new output voltage again according to the trial charging electric current of resetting, and judge that whether the output voltage that obtains again is less than threshold voltage, namely as long as step 204 is judged output voltage more than or equal to threshold voltage, then circulation step 202 is to step 204, till when judging output voltage greater than threshold voltage, and enter step 205;
Wherein, threshold voltage is 4.75V.
By the method that charging current is set automatically provided by the present invention, make after the portable terminal insertion has the charger of USB interface, the charging current of portable terminal the best can be set automatically, make this best charging current be fixed, thereby make portable terminal can be safely, the charger of adaptive various band USB interface efficiently, and do not have potential safety hazard.
The present invention also provides a kind of portable terminal that can realize arranging automatically charging current, and the functional block diagram of this portable terminal is asked for an interview Fig. 3, and Fig. 3 is the preferred embodiment functional block diagram of a kind of portable terminal provided by the present invention.
As shown in Figure 3, portable terminal provided by the invention comprises:
Charging current arranges module 312, be used for arranging the preset value of portable terminal acquiescence charging current, progressively increase described preset value to obtain the trial charging electric current of portable terminal charger with default current increment, and the instruction of obtaining with judge module 311 according to output voltage deducts a described current increment value to obtain accurate charging current with the current trial charging current value of portable terminal charger, sees above-mentioned preferred embodiment for details;
Charging current acquisition module 322 obtains trial charging electric current and accurate charging current for the setting that module 312 is set according to charging current from the portable terminal charger, sees above-mentioned preferred embodiment for details;
Output voltage obtains and judge module 311, be used for obtaining the output voltage of charger, and just just judge that when charging current arranges module 312 current increment of every increase on the basis of charging current preset value whether the output voltage of charger is less than default threshold voltage; When being, then controlling charging current and module 312 is set obtains accurate charging current; When not, then control charging current and module 312 is set continues progressively to increase described preset value to obtain the trial charging electric current of portable terminal charger with default current increment, see above-mentioned preferred embodiment for details.
Wherein, described charging current arranges module 312 and obtains with judge module 311 with output voltage and be arranged on the portable terminal central processing unit 310;
Described charging current acquisition module 322 and described charging module 323 are arranged on the portable terminal power management chip 320;
And described charging current acquisition module 322 obtains the charging current I of charger by the VBUS pin of charger USB interface
nDescribed output voltage obtains and the judge module 311 ADC(Analog-to-Digital Converter by power management chip 320, analog to digital converter) obtain the output voltage on the VBUS pin of charger USB interface.
Below in conjunction with the charging current of Fig. 4 module 312 is set and does and specify, wherein, Fig. 4 is the preferred embodiment functional block diagram that the charging current of portable terminal provided by the present invention arranges module.
Described charging current arranges module 312 and comprises:
The charging current preset value arranges unit 401, is used for arranging portable terminal acquiescence charging current preset value I
1
The trial charging electric current arranges unit 402, is used for default current increment I
0Progressively increase described preset value I
1To obtain the trial charging electric current I of portable terminal charger
n
Accurate charging current arranges unit 403, is used for deducting a described current increment value to obtain accurate charging current with the current trial charging current value of portable terminal charger, and namely the accurate charging current of Huo Deing is I
n-I
0
Wherein, described charging current preset value I
1Be 400mA, described current increment I
0Be 100mA, described threshold voltage is 4.75V.
In sum, by a kind of charging method and portable terminal that charging current is set automatically provided by the present invention, make portable terminal can identify the optimal charge electric current of USB charger automatically, portable terminal charges with its optimal charge electric current of determining, and like this, portable terminal just can be safely, adaptive various USB charger efficiently, and in charging process, do not have the potential safety hazard that causes the charger infringement, can be not accidents caused, improved the fail safe of portable terminal.
Should be understood that application of the present invention is not limited to above-mentioned giving an example, for those of ordinary skills, can be improved according to the above description or conversion that all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (10)
1. the charging method that charging current is set automatically is characterized in that, comprises step:
A, the preset value of portable terminal acquiescence charging current is set, progressively increases described preset value obtaining the trial charging electric current of portable terminal charger with default current increment, and give described portable terminal trial charging with described trial charging electric current; And current increment of every increase just judges that whether the output voltage of charger is less than default threshold voltage;
B, when judging described output voltage less than default threshold voltage, then deduct a described current increment value obtaining accurate charging current with the current trial charging current value of portable terminal charger, and with this accurate charging current described portable terminal charged.
2. the charging method that charging current is set automatically according to claim 1 is characterized in that, described steps A specifically comprises:
A11, the preset value I of portable terminal acquiescence charging current is set
1
A12, the current increment I to preset
0Progressively increase the preset value I of described charging current
1To obtain the trial charging electric current I of portable terminal charger
n
A13, obtain the output voltage of portable terminal charger;
A14, judge that described output voltage is whether less than default threshold voltage; When being, then enter step B, i.e. accurate charging current I to obtain
n-I
0Portable terminal is charged; When not, then enter steps A 15;
A15, circulation described steps A 12 be to A14, during less than default threshold voltage, then enters step B until the output voltage of judging the portable terminal charger.
3. the charging method that charging current is set automatically according to claim 2 is characterized in that, the preset value I of acquiescence charging current in the described steps A 11
1Be 400mA, current increment I in the described steps A 12
0Be 100mA.
4. the charging method that charging current is set automatically according to claim 2 is characterized in that, the threshold voltage in the described steps A 14 is 4.75V.
5. the charging method that charging current is set automatically according to claim 1 is characterized in that, in described steps A, described portable terminal obtains described trial charging electric current and the accurate charging current of charger by the VBUS pin of charger USB interface.
6. the charging method that charging current is set automatically according to claim 1 is characterized in that, in described steps A, described portable terminal obtains the output voltage of charger by the VBUS pin of charger USB interface.
7. the portable terminal that charging current is set automatically is characterized in that, comprising:
Charging current arranges module, be used for arranging the preset value of portable terminal acquiescence charging current, progressively increase described preset value obtaining the trial charging electric current of portable terminal charger with default current increment, and the instruction of obtaining with judge module according to output voltage deducts a described current increment value to obtain accurate charging current with the current trial charging current value of portable terminal charger;
The charging current acquisition module obtains trial charging electric current and accurate charging current for the setting that module is set according to charging current from the portable terminal charger;
Charging module, the trial charging electric current that is used for obtaining according to the charging current acquisition module is given the portable terminal trial charging, and charges to portable terminal according to the accurate charging current that the charging current acquisition module obtains;
Output voltage obtains and judge module, is used for obtaining the output voltage of charger, and just just judges that when charging current arranges module current increment of every increase on the basis of charging current preset value whether the output voltage of charger is less than default threshold voltage; When being, then controlling charging current and module is set obtains accurate charging current; When not, then control charging current and module is set continues progressively to increase described preset value to obtain the trial charging electric current of portable terminal charger with default current increment.
8. portable terminal according to claim 7 is characterized in that, described charging current arranges module and comprises:
The charging current preset value arranges the unit, is used for arranging portable terminal acquiescence charging current preset value I
1
The trial charging electric current arranges the unit, is used for default current increment I
0Progressively increase described preset value I
1To obtain the trial charging electric current I of portable terminal charger
n
Accurate charging current arranges the unit, is used for deducting a described current increment value to obtain accurate charging current with the current trial charging current value of portable terminal charger, and namely the accurate charging current of Huo Deing is I
n-I
0
9. portable terminal according to claim 7 is characterized in that, described charging current preset value is 400mA, and described current increment is 100mA, and described threshold voltage is 4.75V.
10. portable terminal according to claim 7 is characterized in that, described charging current acquisition module obtains described trial charging electric current and accurate charging current by the VBUS pin of charger USB interface;
Described output voltage obtains the output voltage that obtains charger with judge module by the VBUS pin of charger USB interface.
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|---|---|---|---|
| CN201310213017.0A CN103269106B (en) | 2013-05-31 | 2013-05-31 | Charging method for setting charging current automatically and mobile terminal |
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|---|---|---|---|
| CN201310213017.0A CN103269106B (en) | 2013-05-31 | 2013-05-31 | Charging method for setting charging current automatically and mobile terminal |
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| CN103269106B CN103269106B (en) | 2015-05-13 |
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