CN104795864A - Mobile terminal capable of detecting charge state accurately and charge state detecting method - Google Patents
Mobile terminal capable of detecting charge state accurately and charge state detecting method Download PDFInfo
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- 238000000034 method Methods 0.000 title abstract description 4
- 238000001514 detection method Methods 0.000 claims abstract description 60
- 239000003990 capacitor Substances 0.000 claims abstract description 31
- 239000004065 semiconductor Substances 0.000 claims description 43
- 230000005611 electricity Effects 0.000 claims description 42
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
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- 238000010295 mobile communication Methods 0.000 description 1
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Abstract
The invention discloses a mobile terminal capable of detecting a charge state accurately and a charge state detecting method. The mobile terminal comprises a charge current control module and a charge detecting module. The mobile terminal has the advantages that by means of detecting charge current inputted by an external charger, the charge current released by a filter capacitor of the external charger is isolated in the current control module, and only charge current released by a filter capacitor of a non-external charger can be inputted into a battery and used for charging the battery, so that accuracy in charge state detection carried out by the mobile terminal is improved, and even if the charger is unplugged after the battery is fully-charged, the problem that the mobile terminal displays charge continuation can be avoided.
Description
Technical field
The present invention relates to mobile communication technology field, particularly a kind of mobile terminal of accurate detection charged state and charged state detection method.
Background technology
The charger internal of existing mobile terminal has the filter capacitor of an about 10uF usually, and charger is when giving mobile terminal lithium cell charging, and this filter capacitor is simultaneously also at stored charge.When mobile terminal charging complete, charger is extracted from socket, this filter capacitor then can discharge its electric charge stored, electric charge connects mobile terminal by data wire and forms a loop, charging current detection module is detected, and intelligent mobile terminal has electric current to input, charging voltage detection module detects that the positive pole electricity of mobile terminal lithium battery increases, then the charging control unit of power management module judge charger continue give mobile terminal lithium cell charging, mobile terminal finally show lithium battery charging.In this case, user has extracted charger, and mobile terminal is but still presented at charging, and charging detects inaccurate, causes puzzlement to user; Meanwhile, mobile terminal need restart the correct display charged state of charging testing mechanism ability, need expend unnecessary electric energy.
Thus prior art need to improve.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of mobile terminal and charged state detection method of accurate detection charged state, efficiently solve mobile terminal charging and terminate the inaccurate problem of rear detection.
In order to achieve the above object, this invention takes following technical scheme:
A mobile terminal for accurate detection charged state, comprising:
Charging current control module, for detecting the charging current of external charger input, when described charging current is the electric current of external charger filter capacitor release, does not export described charging current; When described charging current is the electric current of non-external charger filter capacitor release, exports described charging current and charge the battery;
Whether charging detection module, increase for the electricity detecting the positive pole of battery, when described electricity does not increase, makes mobile terminal show battery not in charging; When described electricity increases, make mobile terminal show battery and charge.
In the mobile terminal of described accurate detection charged state, described charging current control module comprises:
Charging current detecting unit, for detecting the charging current of external charger input, and exports reference current to current comparator unit;
Current comparator unit, for comparing charging current and the size of reference current of external charger input, when the charging current of external charger input being greater than reference current, controlling triode control unit and exporting charging current and charge the battery; When the charging current of external charger input is less than reference current, controls triode control unit and do not export charging current;
Described triode control unit, for the control according to current comparator module, exports charging current and charges the battery.
In the mobile terminal of described accurate detection charged state, described charging detection module comprises:
Whether charging voltage detecting unit, increase for the electricity detecting the positive pole of battery, when described electricity does not increase, exports the first enable signal to central processing unit; When described electricity increases, export the second enable signal to central processing unit;
Central processing unit, for receiving the enable signal of charging voltage detecting unit input, when receiving the first enable signal, exporting control signal and metal-oxide-semiconductor control unit is turned off; When receiving the second enable signal, exporting control signal and making the conducting of metal-oxide-semiconductor control unit;
Metal-oxide-semiconductor control unit, for the control signal according to central processing unit, the connection of shutoff or conducting charging judging unit and central processing unit;
Charging judging unit, for detecting the break-make of metal-oxide-semiconductor control unit, when metal-oxide-semiconductor control unit turns off, makes mobile terminal show battery not in charging; When the conducting of metal-oxide-semiconductor control unit, make mobile terminal show battery and charge.
In the mobile terminal of described accurate detection charged state, described central processing unit comprises:
Memory cell, for storing the enable signal of charging voltage detecting unit input;
Command register unit, for the enable signal that register storage unit stores;
Processor unit, for the enable signal that call instruction register cell is deposited, when enable signal is the first enable signal, exports control signal and metal-oxide-semiconductor control unit is turned off; When enable signal is the second enable signal, exports control signal and make the conducting of metal-oxide-semiconductor control unit.
In the mobile terminal of described accurate detection charged state, described metal-oxide-semiconductor control unit comprises PMOS.
In the charged state detection method of described mobile terminal, comprise the steps:
The charging current of A, the input of detection external charger;
B, described charging current be external charger filter capacitor release electric current time, do not export described charging current; When described charging current is the electric current of non-external charger filter capacitor release, exports described charging current and charge the battery;
Whether the electricity of the positive pole of C, detection battery increases;
D, when described electricity does not increase, make mobile terminal show battery not charging; When described electricity increases, make mobile terminal show battery and charge.
In described charged state detection method, described steps A specifically comprises: charging current detecting unit detects the charging current of external charger input, and exports reference current to current comparator unit.
In described charged state detection method, described step B specifically comprises: current comparator unit compares the charging current of external charger input and the size of reference current, when the charging current of external charger input is greater than reference current, controls triode control unit output charging current and charge the battery; When the charging current of external charger input is less than reference current, controls triode control unit and do not export charging current.
In described charged state detection method, described step C specifically comprises: whether the electricity that charging voltage detecting unit detects the positive pole of battery increases, and when described electricity does not increase, exports the first enable signal to central processing unit; When described electricity increases, export the second enable signal to central processing unit.
In described charged state detection method, described step D specifically comprises:
D1, central processing unit receive enable signal, when receiving the first enable signal, exporting control signal and metal-oxide-semiconductor control unit is turned off; When receiving the second enable signal, exporting control signal and making the conducting of metal-oxide-semiconductor control unit;
D2, charging judging unit detect the break-make of metal-oxide-semiconductor control unit, when metal-oxide-semiconductor control unit turns off, make mobile terminal show battery not in charging; When the conducting of metal-oxide-semiconductor control unit, make mobile terminal show battery and charge.
Compared to prior art, the mobile terminal of accurate detection charged state provided by the invention and charged state detection method, by detecting the charging current of external charger input, the charging current that external charger filter capacitor discharges is isolated in charging current control module, the charging current only having non-external charger filter capacitor to discharge just can be input to battery, charge the battery, improve the accuracy that mobile terminal detects charged state, even if pull out charger after being full of electricity, mobile terminal is also there will not be to show the situation continuing charging.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the mobile terminal of accurate detection charged state provided by the invention.
Fig. 2 is in the mobile terminal of accurate detection charged state provided by the invention, the structured flowchart of described charging current control module.
Fig. 3 is in the mobile terminal of accurate detection charged state provided by the invention, the structured flowchart of described charging detection module.
Fig. 4 is the method flow diagram that the invention provides charged state detection method.
Fig. 5 for the invention provides in charged state detection method, the concrete grammar flow chart of described step S40.
Embodiment
The invention provides a kind of mobile terminal and charged state detection method of accurate detection charged state, shielded by the charging current discharged external charger filter capacitor, improve the accuracy that charging detects.
For making object of the present invention, technical scheme and effect clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, the mobile terminal of accurate detection charged state provided by the invention, comprise: charging current control module 20, charging detection module 30 and battery 40, external charger 10 connects battery 40 by described charging current control module 20, and described charging detection module 30 connects the positive pole of battery 40.
Wherein, described charging current control module 20, for detecting the charging current that external charger 10 inputs, when described charging current is the electric current of external charger 10 filter capacitor release, does not export described charging current; When described charging current is the electric current of non-external charger filter capacitor release, exports described charging current and charge to battery 40.Namely, the current shielding that external charger filter capacitor discharges by described charging current control module 20 is outside battery 40, the charging current only having external charger 10 normally to export could be charged to battery 40, not only ensure the safety that battery 40 charges, it also avoid after pulling out charger, mobile terminal display battery is still in the situation of charging.
Whether charging detection module 30, increase for the electricity detecting the positive pole of battery 40, when described electricity does not increase, makes mobile terminal show battery not in charging; When described electricity increases, make mobile terminal show battery and charge.Because the electric current of external charger filter capacitor release is shielded by charging current control module 20, therefore whether the electricity that charging detection module 30 need detect the positive pole of battery 40 increases and can judge that whether mobile terminal is in charging.
Further, refer to Fig. 2, described charging current control module 20 comprises: charging current detecting unit 210, current comparator unit 220 and triode control unit 230.Described external charger 10 connects the first input end 1 of current comparator unit 220, and described external charger 10 also connects the second input 2 of current comparator unit 220 by charging current detecting unit 210; The control signal input of the output connecting triode control unit 230 of described current comparator unit 220; Described external charger 10 also connects battery 40 by triode control unit 230.
Described charging current detecting unit 210, for detecting the charging current that external charger 10 inputs, and exports reference current to current comparator unit 220.Described reference current is for separating the charging current of normal charging current and the release of external charger filter capacitor.The large I of described reference current is determined according to the discharging current of charging current when charging normal and filter capacitor.Usually, when external charger is extracted from plug, usually at 100mA once, and normal charging current is greater than 100mA to the electric current of its filter capacitor release usually, therefore it is better that described reference current chooses 100mA.Certainly, described reference current also can choose other values, and as 1A etc., the present invention is not construed as limiting.
Described current comparator unit 220, for comparing the charging current and the size of reference current that external charger 10 inputs, when the charging current that external charger 10 inputs is greater than reference current, control triode control unit 230 exports charging current and charges to battery 40, now thinks that charging current is the electric current of non-external charger filter capacitor release; When the charging current that external charger 10 inputs is less than reference current, controls triode control unit 230 and do not export charging current, now think that charging current is the electric current of external charger filter capacitor release.Wherein, described current comparator unit 220 comprises current comparator.
Described triode control unit 230, for the control according to current comparator module 220, exports described charging current and charges the battery.Wherein, described triode control unit 230 comprises NPN triode.
Concrete, described external charger 10 connects the normal phase input end of current comparator, the output of described charging current detecting unit 210 connects the inverting input of current comparator, the output of described current comparator connects the base stage of NPN triode, the collector electrode of described NPN triode connects external charger 10, and the emitter of described NPN triode connects battery 40.
After charging current detecting unit 210 detects the charging current I1 of external charger 10 input, export reference current I2 to the inverting input of current comparator, the normal phase input end input charging current I1 of described current comparator.Because mobile terminal is when charging normal, charging current I1 is greater than reference current I2, therefore current comparator exports high level signal to the base stage of NPN triode, makes NPN triode ON, and external charger 10 charges to battery 40.And after external charger 10 extracts from socket, during external charger filter capacitor release charging current I1, charging current I1 is less than reference current I2, therefore current comparator output low level signal is to the base stage of NPN triode, NPN triode is turned off, and external charger 10 charges to battery 40.
When described charging current control module 20 utilizes mobile terminal to charge normal, charging current is higher, and during the electric discharge of external charger filter capacitor, the feature that charging current is lower, by comparing the size of charging current and reference current, achieve the function automatically identifying charging current.
Refer to Fig. 3, described charging detection module 30 comprises: charging voltage detecting unit 310, central processing unit 320, metal-oxide-semiconductor control unit 330 and charging judging unit 340.
Whether described charging voltage detecting unit 310, increase for the electricity detecting the positive pole of battery 40, when described electricity does not increase, exports the first enable signal to central processing unit 320; When described electricity increases, export the second enable signal to central processing unit 320.
Described central processing unit 320, for receiving the enable signal that charging voltage detecting unit 310 inputs, when receiving the first enable signal, exporting control signal and metal-oxide-semiconductor control unit 330 is turned off; When receiving the second enable signal, exporting control signal and making metal-oxide-semiconductor control unit 330 conducting.
Described metal-oxide-semiconductor control unit 330, for the control signal according to central processing unit 320, the connection of shutoff or conducting charging judging unit 340 and central processing unit 330.Described metal-oxide-semiconductor control unit 330 comprises PMOS, described central processing unit 320 output voltage is to the source electrode of PMOS, the drain electrode of described PMOS connects charging judging unit 340, and described central processing unit 320 exports control signal to the grid level of PMOS, controls the break-make of PMOS.
Described charging judging unit 340, for detecting the break-make of metal-oxide-semiconductor control unit 330, when metal-oxide-semiconductor control unit 330 turns off, makes mobile terminal show battery not in charging; When 330 conducting of metal-oxide-semiconductor control unit, make mobile terminal show battery and charge.
Further, described central processing unit 320 comprises: memory cell 321, command register unit 322 and processor unit 323.
Described memory cell 321, for storing the enable signal that charging voltage detecting unit 310 inputs.Described memory cell 321 comprises memory.
Described command register unit 322, for the enable signal that register storage unit 321 stores.Described command register unit 322 comprises command register.
Described processor unit 323, for the enable signal that call instruction register cell 322 is deposited, when enable signal is the first enable signal, exports control signal and metal-oxide-semiconductor control unit 330 is turned off; When enable signal is the second enable signal, exports control signal and make metal-oxide-semiconductor control unit 330 conducting.
Refer to Fig. 4, based on the mobile terminal of the accurate detection charged state that a upper embodiment provides, the present invention also provides a kind of charged state detection method of mobile terminal, and comprise the mobile terminal accurately detecting charged state as above, the step of described method is as follows:
The charging current of S10, the input of detection external charger.Concrete, described charging current control module detects the charging current of external charger input.
S20, described charging current be external charger filter capacitor release electric current time, do not export described charging current; When described charging current is the electric current of non-external charger filter capacitor release, exports described charging current and charge the battery.Concrete, described charging current control module, when described charging current is the electric current of external charger filter capacitor release, does not export described charging current; When described charging current is the electric current of non-external charger filter capacitor release, exports described charging current and charge the battery.
Whether the electricity of the positive pole of S30, detection battery increases.Concrete, whether the electricity that described charging detection module detects the positive pole of battery increases.
S40, when described electricity does not increase, make mobile terminal show battery not charging; When described electricity increases, make mobile terminal show battery and charge.Concrete, described charging detection module, when described electricity does not increase, makes mobile terminal show battery not in charging; When described electricity increases, make mobile terminal show battery and charge.
Wherein, described step S10 specifically comprises: described charging current detecting unit detects the charging current of external charger input, and exports reference current to current comparator unit.
Described step S20 specifically comprises: described current comparator unit compares the charging current of external charger input and the size of reference current, when the charging current of external charger input is greater than reference current, controls triode control unit output charging current and charge the battery; When the charging current of external charger input is less than reference current, controls triode control unit and do not export charging current.
Described step S30 specifically comprises: whether the electricity that described charging voltage detecting unit detects the positive pole of battery increases, and when described electricity does not increase, exports the first enable signal to central processing unit; When described electricity increases, export the second enable signal to central processing unit.
Refer to Fig. 5, described step S40 specifically comprises:
S410, central processing unit receive enable signal, when receiving the first enable signal, exporting control signal and metal-oxide-semiconductor control unit is turned off; When receiving the second enable signal, exporting control signal and making the conducting of metal-oxide-semiconductor control unit.
S420, described charging judging unit detect the break-make of metal-oxide-semiconductor control unit, when metal-oxide-semiconductor control unit turns off, make mobile terminal show battery not in charging; When the conducting of metal-oxide-semiconductor control unit, make mobile terminal show battery and charge.
Because described charged state detection side ratio juris and detail technical features elaborate in a upper embodiment, do not repeat them here.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the present invention.
Claims (10)
1. accurately detect a mobile terminal for charged state, it is characterized in that, comprising:
Charging current control module, for detecting the charging current of external charger input, when described charging current is the electric current of external charger filter capacitor release, does not export described charging current; When described charging current is the electric current of non-external charger filter capacitor release, exports described charging current and charge the battery;
Whether charging detection module, increase for the electricity detecting the positive pole of battery, when described electricity does not increase, makes mobile terminal show battery not in charging; When described electricity increases, make mobile terminal show battery and charge.
2. the mobile terminal of accurate detection charged state according to claim 1, is characterized in that, described charging current control module comprises:
Charging current detecting unit, for detecting the charging current of external charger input, and exports reference current to current comparator unit;
Current comparator unit, for comparing charging current and the size of reference current of external charger input, when the charging current of external charger input being greater than reference current, controlling triode control unit and exporting charging current and charge the battery; When the charging current of external charger input is less than reference current, controls triode control unit and do not export charging current;
Described triode control unit, for the control according to current comparator module, exports charging current and charges the battery.
3. the mobile terminal of accurate detection charged state according to claim 1, is characterized in that, described charging detection module comprises:
Whether charging voltage detecting unit, increase for the electricity detecting the positive pole of battery, when described electricity does not increase, exports the first enable signal to central processing unit; When described electricity increases, export the second enable signal to central processing unit;
Central processing unit, for receiving the enable signal of charging voltage detecting unit input, when receiving the first enable signal, exporting control signal and metal-oxide-semiconductor control unit is turned off; When receiving the second enable signal, exporting control signal and making the conducting of metal-oxide-semiconductor control unit;
Metal-oxide-semiconductor control unit, for the control signal according to central processing unit, the connection of shutoff or conducting charging judging unit and central processing unit;
Charging judging unit, for detecting the break-make of metal-oxide-semiconductor control unit, when metal-oxide-semiconductor control unit turns off, makes mobile terminal show battery not in charging; When the conducting of metal-oxide-semiconductor control unit, make mobile terminal show battery and charge.
4. the mobile terminal of accurate detection charged state according to claim 3, it is characterized in that, described central processing unit comprises:
Memory cell, for storing the enable signal of charging voltage detecting unit input;
Command register unit, for the enable signal that register storage unit stores;
Processor unit, for the enable signal that call instruction register cell is deposited, when enable signal is the first enable signal, exports control signal and metal-oxide-semiconductor control unit is turned off; When enable signal is the second enable signal, exports control signal and make the conducting of metal-oxide-semiconductor control unit.
5. the mobile terminal of accurate detection charged state according to claim 1, is characterized in that, described metal-oxide-semiconductor control unit comprises PMOS.
6., based on a charged state detection method for mobile terminal according to claim 1, it is characterized in that, comprise the steps:
The charging current of A, the input of detection external charger;
B, described charging current be external charger filter capacitor release electric current time, do not export described charging current; When described charging current is the electric current of non-external charger filter capacitor release, exports described charging current and charge the battery;
Whether the electricity of the positive pole of C, detection battery increases;
D, when described electricity does not increase, make mobile terminal show battery not charging; When described electricity increases, make mobile terminal show battery and charge.
7. charged state detection method according to claim 6, is characterized in that, described steps A specifically comprises: charging current detecting unit detects the charging current of external charger input, and exports reference current to current comparator unit.
8. charged state detection method according to claim 7, it is characterized in that, described step B specifically comprises: current comparator unit compares the charging current of external charger input and the size of reference current, when the charging current of external charger input is greater than reference current, controls triode control unit output charging current and charge the battery; When the charging current of external charger input is less than reference current, controls triode control unit and do not export charging current.
9. charged state detection method according to claim 8, it is characterized in that, described step C specifically comprises: whether the electricity that charging voltage detecting unit detects the positive pole of battery increases, and when described electricity does not increase, exports the first enable signal to central processing unit; When described electricity increases, export the second enable signal to central processing unit.
10. charged state detection method according to claim 9, is characterized in that, described step D specifically comprises:
D1, central processing unit receive enable signal, when receiving the first enable signal, exporting control signal and metal-oxide-semiconductor control unit is turned off; When receiving the second enable signal, exporting control signal and making the conducting of metal-oxide-semiconductor control unit;
D2, charging judging unit detect the break-make of metal-oxide-semiconductor control unit, when metal-oxide-semiconductor control unit turns off, make mobile terminal show battery not in charging; When the conducting of metal-oxide-semiconductor control unit, make mobile terminal show battery and charge.
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| CN104795864B (en) | 2017-12-12 |
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