CN105207331A - Mobile terminal charging circuit and mobile terminal - Google Patents
Mobile terminal charging circuit and mobile terminal Download PDFInfo
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- CN105207331A CN105207331A CN201510725550.4A CN201510725550A CN105207331A CN 105207331 A CN105207331 A CN 105207331A CN 201510725550 A CN201510725550 A CN 201510725550A CN 105207331 A CN105207331 A CN 105207331A
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Abstract
The invention belongs to the field of mobile terminals and provides a mobile terminal charging circuit and a mobile terminal. By adopting the mobile terminal charging circuit comprising an electronic switch, a polar capacitor C1, a voltage converter T1, a current control module, a main control module, an interference signal elimination module, a first resistor R1, an output voltage detection module and a voltage protection module, over-voltage protection is realized in real time in a mobile terminal charging process, and potential safety hazards, caused by overcharging, to users are avoided.
Description
Technical field
The invention belongs to field of mobile terminals, particularly relate to a kind of mobile terminal charging circuit and mobile terminal.
Background technology
Modern mobile terminal has had very powerful disposal ability (CPU frequency is close to 2G), internal memory, solidification storage medium and the operating system as computer.It is a complete superminicomputer system.Complicated Processing tasks can be completed.Mobile terminal also has very abundant communication mode, namely can by wireless operator Netcom news such as GSM, CDMA, WCDMA, EDGE, 3G, and also can pass through WLAN (wireless local area network), bluetooth communicates with infrared.
The mobile terminal of today not only can be conversed, take pictures, listen to the music, play games, and can realize comprising the abundant function such as location, information processing, finger scan, identity card scanning, bar code scan, RFID scanning, IC-card scanning and alcohol content detection, become the important tool of mobile law enforcement, mobile office and Mobile business.Intercom is still integrated on mobile terminal by some mobile terminals.Mobile terminal has incorporated in our economic and social life dearly, for improving the living standard of the people, improving law enforcement efficiency, improving the efficiency of management of producing, and reduces resource consumption and environmental pollution and accident emergency processing and adds new means.This intelligent terminal is used in express delivery, the fields such as insurance, mobile law enforcement abroad.Recent years, mobile terminal is also applied in mobile law enforcement and the Mobile business field of China more and more widely.
But the charging circuit of current mobile terminal does not generally possess safeguard protection, often there is situation about surprisingly occurring during charging, bring the potential safety hazard of lives and properties to user.
Summary of the invention
The object of the present invention is to provide a kind of mobile terminal charging circuit, be intended to solve the problem that existing mobile terminal charging circuit exists potential safety hazard.
The present invention is achieved in that a kind of mobile terminal charging circuit, and described mobile terminal charging circuit comprises:
Electronic switch, polar capacitor C1, electric pressure converter T1, current control module, main control module, interference signal cancellation module, the first resistance R1, output voltage detection module and voltage protection module;
The first end of described electronic switch and the first switch terminals of described main control module are connected to the live wire end of civil power altogether, the first end of the second end of described electronic switch and the second switch end of described main control module and described polar capacitor C1 is connected to the first end of the armature winding of described electric pressure converter T1 altogether, second end of second end of described polar capacitor C1 and the armature winding of described electric pressure converter T1 is connected to the zero line side of civil power altogether, the input of described current control module connects the first end of the secondary winding of described electric pressure converter T1, the output of described current control module and the output of described output voltage detection module are connected to the charging controlled end of described main control module altogether, the input of described interference signal cancellation module connects the second end of the secondary winding of described electric pressure converter T1, the output of described interference signal cancellation module connects the first end of described first resistance R1, second end of described first resistance R1 and the test side of described output voltage detection module and the test side of described voltage protection module are connected to the positive pole of the battery in mobile terminal altogether, the control end of described voltage protection module connects the overvoltage controlled end of described main control module, the earth terminal of described interference signal cancellation module and the earth terminal of described output voltage detection module, the negative pole of described battery, the earth terminal of described voltage protection module and the earth terminal of described main control module are connected to the 3rd end of the secondary winding of described electric pressure converter T1 altogether.
When described electronic switch is pressed, the alternating current that civil power exports is by described polar capacitor C1 filtering, and carry out step-down process by described electric pressure converter T1, carry out main control module conducting described in rectification and current limliting process rear drive by described current control module again and substitute described electronic switch continuing to introduce described alternating current from civil power, simultaneously, after the output AC electricity of described interference signal cancellation module to described electric pressure converter T1 carries out rectifying and wave-filtering process, then after carrying out current limliting process by described first resistance R1, described battery is charged; When described battery voltage because of be full of electricity or charging voltage too high and reach preset high-pressure value time, described voltage protection module controls described main control module and turns off and stop introducing described direct current from civil power; When the voltage of described battery is reduced to pre-set low pressure value because of electric discharge, described output voltage detection module drives described main control module conducting and again introduces described alternating current from civil power, and described battery restarts charging.
Another object of the present invention is also to provide a kind of mobile terminal, and described mobile terminal comprises lamp group and battery, and described lamp group obtains power supply from described battery; Described mobile terminal also comprises above-mentioned mobile terminal charging circuit.
The present invention comprises the mobile terminal charging circuit of electronic switch, polar capacitor C1, electric pressure converter T1, current control module, main control module, interference signal cancellation module, the first resistance R1, output voltage detection module and voltage protection module by adopting; in mobile terminal charging process, carry out overvoltage protection in real time, avoid because overshoot brings potential safety hazard to user.
Accompanying drawing explanation
Fig. 1 is the function structure chart of the mobile terminal charging circuit that the embodiment of the present invention provides;
Fig. 2 is the exemplary circuit structure chart of the mobile terminal charging circuit that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With the example that is applied as in the terminal, the mobile terminal charging circuit that the embodiment of the present invention provides is described in detail below:
Mobile terminal comprises lamp group, battery and mobile terminal charging circuit, and lamp group obtains power supply from battery.
Fig. 1 shows the modular structure of the mobile terminal charging circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only part related to the present invention, details are as follows:
Mobile terminal charging circuit is connected with the battery BT in mobile terminal, and mobile terminal charging circuit comprises electronic switch S1, polar capacitor C1, electric pressure converter T1, current control module 100, main control module 200, interference signal cancellation module 300, first resistance R1, output voltage detection module 500 and voltage protection module 600.
The first end of electronic switch S1 and the first switch terminals of main control module 200 are connected to the live wire end L of civil power altogether, the first end of second end of electronic switch S1 and the second switch end of main control module 200 and polar capacitor C1 is connected to the first end 1 of the armature winding of electric pressure converter T1 altogether, second end 2 of second end of polar capacitor C1 and the armature winding of electric pressure converter T1 is connected to the zero line side N of civil power altogether, the input of current control module 100 connects the first end 3 of the secondary winding of electric pressure converter T1, the output of current control module 100 and the output of output voltage detection module 500 are connected to the charging controlled end of main control module 200 altogether, the input of interference signal cancellation module 300 connects the second end 4 of the secondary winding of electric pressure converter T1, the output of interference signal cancellation module 300 connects the first end of the first resistance R1, the test side of second end of the first resistance R1 and the test side of output voltage detection module 500 and voltage protection module 600 is connected to the positive pole of battery BT altogether, the control end of voltage protection module 600 connects the overvoltage controlled end of main control module 200, the earth terminal of interference signal cancellation module 300 and the earth terminal of output voltage detection module 500, the negative pole of battery BT, the earth terminal of voltage protection module 600 and the earth terminal of main control module 200 are connected to the 3rd end 5 of the secondary winding of electric pressure converter T1 altogether.
When electronic switch S1 is pressed, the alternating current that civil power exports is by polar capacitor C1 filtering, and carry out step-down process by electric pressure converter T1, carry out rectification and the conducting of current limliting process rear drive main control module 200 by current control module 100 again and substitute electronic switch S1 continuing to introduce alternating current from civil power, simultaneously, after the output AC electricity of interference signal cancellation module 300 couples of electric pressure converter T1 carries out rectifying and wave-filtering process, then after carrying out current limliting process by current limliting module 400, battery BT is charged.
When battery BT voltage because of be full of electricity or charging voltage too high and reach preset high-pressure value time, voltage protection module 600 controls main control module 200 and turns off and stop introducing described direct current from civil power.
When the voltage of battery BT is reduced to pre-set low pressure value because of electric discharge, output voltage detection module 500 drives main control module 200 conducting and again introduces alternating current from civil power, and battery BT restarts charging.
Know to enable user whether the elementary of electric pressure converter T1 normally introduces alternating current intuitively, the anode that mobile terminal charging circuit can also comprise the first LED 1, first LED 1 is connected second end of polar capacitor C1 and the zero line side N of civil power respectively with negative electrode.
Moreover, whether charged state is in order to enable user's electrolytic cell BT, mobile terminal charging circuit can also comprise charging indicating module 400, and input and the output of charging indicating module 400 are connected the 3rd end 3 of the output of interference signal cancellation module 300 and the secondary winding of electric pressure converter T1 respectively.
In addition, in order to carry out high voltage protection when line voltage raises instantaneously to circuit, mobile terminal charging circuit also comprises piezo-resistance RV1, and piezo-resistance RV1 is connected between the live wire end L of civil power and zero line side N.
Fig. 2 shows the exemplary circuit structure of the mobile terminal charging circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only part related to the present invention, details are as follows:
As one embodiment of the invention, current control module 100 comprises the first diode D1 and the second resistance R2, the anode of the first diode D1 is the input of current control module 100, the negative electrode of the first diode D1 connects the first end of the second resistance R2, and second end of the second resistance R2 is the output of current control module 100.
As one embodiment of the invention, main control module 200 comprises:
3rd resistance R3, NPN type triode Q1 and the first relay K 1;
The first end of the 3rd resistance R3 and the first common contact controlling contact 1 of the first relay K 1 are the charging controlled end of main control module 200, the common contact of second end of the 3rd resistance R3 and the base stage of NPN type triode Q1 is the overvoltage controlled end of main control module 200, the collector electrode of NPN type triode Q1 connects second of the first relay K 1 and controls contact 2, the earth terminal of the transmitting of NPN type triode Q1 very main control module 200, the switch contact 3 of the first relay K 1 and normally opened contact 4 are respectively the first switch terminals and the second switch end of main control module 200.
As one embodiment of the invention, interference signal cancellation module 300 comprises the second diode D2 and filter capacitor C2, the anode of the second diode D2 is the input of interference signal cancellation module 300, the common contact of the negative electrode of the second diode D2 and the positive pole of filter capacitor C2 is the output of interference signal cancellation module 300, and the negative pole of filter capacitor C2 is the earth terminal of interference signal cancellation module 300.
As one embodiment of the invention, output voltage detection module 500 comprises:
4th resistance R4, the 5th resistance R5, PNP type triode Q2 and the second relay K 2;
The first end of the 4th resistance R4, the first common contact controlling contact 1 and switch contact 3 of the second relay K 2 is the test side of output voltage detection module 500, second end of the 4th resistance R4 and the first end of the 5th resistance R5 are connected to the base stage of PNP type triode Q2 altogether, the emitter of PNP type triode Q2 connects second of the second relay K 2 and controls contact 2, the common contact of the collector electrode of PNP type triode Q2 and second end of the 5th resistance R5 is the earth terminal of output voltage detection module 500, the normally opened contact 4 of the second relay K 2 is the output of output voltage detection module 500.
As one embodiment of the invention; voltage protection module 600 comprises voltage stabilizing didoe VD1 and optocoupler U1; the negative electrode of voltage stabilizing didoe VD1 is the test side of voltage protection module 600; the anode of voltage stabilizing didoe VD1 connects the anode of the light-emitting diode of optocoupler U1; the control end of the current collection of the phototriode of optocoupler U1 very voltage protection module 600, the common contact of the negative electrode of the light-emitting diode of optocoupler U1 and the emitter of phototriode is the earth terminal of voltage protection module 600.
As one embodiment of the invention, charging indicating module 400 comprises the 6th resistance R6 and the second LED 2, the first end of the 6th resistance R6 is the input of charging indicating module 400, second end of the 6th resistance R6 connects the anode of the second LED 2, and the negative electrode of the second LED 2 is the output of charging indicating module 400.
Below in conjunction with operation principle, above-mentioned mobile terminal charging circuit is described further:
When needs charge to battery BT, press electronic switch S1 and introduce alternating current, alternating current is by after electric pressure converter T1 step-down, through the first diode D1 rectification, second resistance R2 current limliting and the 3rd resistance R3 again current limliting arrive the base stage of NPN type triode Q1, NPN type triode Q1 conducting, first relay K 1 thereupon electric adhesive, then now can substitute electronic switch S1 by the first relay K 1 to continue to introduce alternating current from civil power, first LED 1 luminescence introduces state to point out alternating current, simultaneously, second diode D2 and filter capacitor C2 forms the secondary AC electricity of current rectifying and wave filtering circuit to electric pressure converter T1 to carry out rectifying and wave-filtering process and obtains direct current, this direct current charges to battery BT after carrying out current limliting by the first resistance R1, and now the second LED 2 also can be luminous to carry out charged state prompting.
When battery BT voltage because of be full of electricity or charging voltage too high (may be cause because of local circuit fault) and reach reverse-conducting pressure drop (i.e. the aforesaid preset high-pressure value) of voltage stabilizing didoe VD1 time, voltage stabilizing didoe VD1 meeting reverse-conducting, and then the LEDs ON making in optocoupler U1, so phototriode in optocoupler U1 also can conducting being dragged down by the base voltage of NPN type triode Q1 thereupon, then NPN type triode Q1 turns off, first relay K 1 disconnects thereupon, namely the switch contact 3 of the first relay K 1 and normally opened contact 4 disconnect, so mobile terminal charging circuit disconnects alternating current access channel, first LED 1 and the second LED 2 extinguish all thereupon, charging work now for battery BT stops.
When the voltage of battery BT is reduced to a certain magnitude of voltage (i.e. aforesaid pre-set low pressure value) because of electric discharge, and the voltage of battery BT is by when making the base voltage of PNP type triode Q2 be reduced to its turn-on bias voltage after the 4th resistance R4 and the 5th resistance R5 dividing potential drop, PNP type triode Q2 conducting, then the second relay K 2 adhesive, namely the switch contact 3 of the second relay K 2 is communicated with normally opened contact 4, so, the path that the direct current that battery BT exports is formed by the switch contact of the second relay K 23 and normally opened contact 4 and the 3rd resistance R3 driving N PN type triode Q1 conducting, then the first relay K 1 adhesive thereupon, the switch contact 3 of the first relay K 1 is with normally opened contact 4 closed communicating and be reintroduced back to alternating current from civil power, so mobile terminal charging circuit starts again to charge to battery BT, first LED 1 and the second LED 2 are also again luminous until battery BT charging complete, after battery BT is full of electricity, first relay K 1 disconnects again cutting off the introducing to alternating current, then the first LED 1 and the second LED 2 extinguish all thereupon.
Therefore; carry out charging according to above-mentioned operation principle to battery BT by mobile terminal charging circuit to control; then can stop charging to it when battery BT charging complete or overvoltage charging; when the voltage of battery BT is reduced to a certain magnitude of voltage because of electric discharge, it is charged; reach to battery BT overcharge protection, overvoltage charge protection and over-discharge can protection object; help avoid the performance degradation of battery BT, ensure that battery BT is not damaged.
The embodiment of the present invention comprises electronic switch S1 by employing, polar capacitor C1, electric pressure converter T1, current control module 100, main control module 200, interference signal cancellation module 300, first resistance R1, the mobile terminal charging circuit of output voltage detection module 500 and voltage protection module 600, mains-supplied is disconnected to avoid overcharging to battery BT when battery BT is full of electricity or charging voltage is too high, and battery BT because of electric discharge voltage drop to charging to it during pre-set low pressure value, to avoid battery BT over-discharge can, thus overvoltage charge protection is realized to battery BT, overcharge protection and over-discharge can protection, be conducive to the useful life extending battery BT, solve existing for prior art cannot to realizing overvoltage charge protection, overcharge protection and over-discharge can protection problem.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a mobile terminal charging circuit, is characterized in that, described mobile terminal charging circuit comprises:
Electronic switch, polar capacitor C1, electric pressure converter T1, current control module, main control module, interference signal cancellation module, the first resistance R1, output voltage detection module and voltage protection module;
The first end of described electronic switch and the first switch terminals of described main control module are connected to the live wire end of civil power altogether, the first end of the second end of described electronic switch and the second switch end of described main control module and described polar capacitor C1 is connected to the first end of the armature winding of described electric pressure converter T1 altogether, second end of second end of described polar capacitor C1 and the armature winding of described electric pressure converter T1 is connected to the zero line side of civil power altogether, the input of described current control module connects the first end of the secondary winding of described electric pressure converter T1, the output of described current control module and the output of described output voltage detection module are connected to the charging controlled end of described main control module altogether, the input of described interference signal cancellation module connects the second end of the secondary winding of described electric pressure converter T1, the output of described interference signal cancellation module connects the first end of described first resistance R1, second end of described first resistance R1 and the test side of described output voltage detection module and the test side of described voltage protection module are connected to the positive pole of the battery in mobile terminal altogether, the control end of described voltage protection module connects the overvoltage controlled end of described main control module, the earth terminal of described interference signal cancellation module and the earth terminal of described output voltage detection module, the negative pole of described battery, the earth terminal of described voltage protection module and the earth terminal of described main control module are connected to the 3rd end of the secondary winding of described electric pressure converter T1 altogether.
2. mobile terminal charging circuit as claimed in claim 1, it is characterized in that, described mobile terminal charging circuit also comprises the first LED 1, and anode and the negative electrode of described first LED 1 are connected second end of described polar capacitor C1 and the zero line side of civil power respectively.
3. mobile terminal charging circuit as claimed in claim 1, it is characterized in that, described mobile terminal charging circuit also comprises charging indicating module, and input and the output of described charging indicating module are connected the 3rd end of the output of described interference signal cancellation module and the secondary winding of described electric pressure converter T1 respectively.
4. mobile terminal charging circuit as claimed in claim 1, it is characterized in that, described mobile terminal charging circuit also comprises piezo-resistance, and described piezo-resistance is connected between the live wire end of civil power and zero line side.
5. mobile terminal charging circuit as claimed in claim 1, it is characterized in that, described current control module comprises the first diode D1 and the second resistance R2, the anode of described first diode D1 is the input of described current control module, the negative electrode of described first diode D1 connects the first end of described second resistance R2, and second end of described second resistance R2 is the output of described current control module.
6. mobile terminal charging circuit as claimed in claim 1, it is characterized in that, described main control module comprises:
3rd resistance R3, NPN type triode and the first relay;
The first end of described 3rd resistance R3 and the first common contact controlling contact of described first relay are the charging controlled end of described main control module, the common contact of described second end of the 3rd resistance R3 and the base stage of described NPN type triode is the overvoltage controlled end of described main control module, the collector electrode of described NPN type triode connects second of described first relay and controls contact, the earth terminal of the very described main control module of transmitting of described NPN type triode, the switch contact of described first relay and normally opened contact are respectively the first switch terminals and the second switch end of described main control module.
7. mobile terminal charging circuit as claimed in claim 1, it is characterized in that, described output voltage detection module comprises:
4th resistance R4, the 5th resistance R5, PNP type triode and the second relay;
The first end of described 4th resistance R4, the first common contact controlling contact and switch contact of described second relay is the test side of described output voltage detection module, second end of described 4th resistance R4 and the first end of described 5th resistance R5 are connected to the base stage of described PNP type triode altogether, the emitter of described PNP type triode connects second of described second relay and controls contact, the common contact of the collector electrode of described PNP type triode and second end of described 5th resistance R5 is the earth terminal of described output voltage detection module, the normally opened contact of described second relay is the output of described output voltage detection module.
8. mobile terminal charging circuit as claimed in claim 1; it is characterized in that; described voltage protection module comprises voltage stabilizing didoe and optocoupler; the negative electrode of described voltage stabilizing didoe is the test side of described voltage protection module; the anode of described voltage stabilizing didoe connects the anode of the light-emitting diode of described optocoupler; the control end of the very described voltage protection module of current collection of the phototriode of described optocoupler, the common contact of the negative electrode of the light-emitting diode of described optocoupler and the emitter of phototriode is the earth terminal of described voltage protection module.
9. mobile terminal charging circuit as claimed in claim 3, it is characterized in that, described charging indicating module comprises the 6th resistance R6 and the second LED 2, the first end of described 6th resistance R6 is the input of described charging indicating module, second end of described 6th resistance R6 connects the anode of described second LED 2, and the negative electrode of described second LED 2 is the output of described charging indicating module.
10. a mobile terminal, comprises lamp group and battery, and described lamp group obtains power supply from described battery, and it is characterized in that, described mobile terminal also comprises the mobile terminal charging circuit as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725550.4A CN105207331A (en) | 2015-11-02 | 2015-11-02 | Mobile terminal charging circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725550.4A CN105207331A (en) | 2015-11-02 | 2015-11-02 | Mobile terminal charging circuit and mobile terminal |
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| CN105207331A true CN105207331A (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510725550.4A Pending CN105207331A (en) | 2015-11-02 | 2015-11-02 | Mobile terminal charging circuit and mobile terminal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449804A (en) * | 2016-01-31 | 2016-03-30 | 苏黎 | Mobile terminal power circuit and device |
| CN105633938A (en) * | 2016-03-09 | 2016-06-01 | 广东欧珀移动通信有限公司 | Battery input system and terminal equipment |
| CN106230071A (en) * | 2016-09-05 | 2016-12-14 | 珠海格力电器股份有限公司 | Wireless charging mobile terminal and wireless charging method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659847A (en) * | 2013-11-20 | 2015-05-27 | 深圳市海洋王照明工程有限公司 | Battery charging control circuit and lamp |
-
2015
- 2015-11-02 CN CN201510725550.4A patent/CN105207331A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659847A (en) * | 2013-11-20 | 2015-05-27 | 深圳市海洋王照明工程有限公司 | Battery charging control circuit and lamp |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449804A (en) * | 2016-01-31 | 2016-03-30 | 苏黎 | Mobile terminal power circuit and device |
| CN105633938A (en) * | 2016-03-09 | 2016-06-01 | 广东欧珀移动通信有限公司 | Battery input system and terminal equipment |
| CN105633938B (en) * | 2016-03-09 | 2018-09-11 | 广东欧珀移动通信有限公司 | battery input system and terminal device |
| CN106230071A (en) * | 2016-09-05 | 2016-12-14 | 珠海格力电器股份有限公司 | Wireless charging mobile terminal and wireless charging method |
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Application publication date: 20151230 |