CN104422541A - Battery detection circuit and method of mobile terminal and mobile terminal - Google Patents
Battery detection circuit and method of mobile terminal and mobile terminal Download PDFInfo
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- CN104422541A CN104422541A CN201310374049.9A CN201310374049A CN104422541A CN 104422541 A CN104422541 A CN 104422541A CN 201310374049 A CN201310374049 A CN 201310374049A CN 104422541 A CN104422541 A CN 104422541A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2217/00—Temperature measurement using electric or magnetic components already present in the system to be measured
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Abstract
The invention discloses a battery detection circuit and method of a mobile terminal and a mobile terminal. The mobile terminal includes a processor and a battery; the battery detection circuit comprises a pulse module and a sampling module; the processor sends control signals to the pulse module; the pulse module generates pulse voltage signals for the battery according to the control signals; the sampling module collects the pulse voltage signals so as to obtain sampling voltage signals and sends the sampling voltage signals to the processor; and the processor performs calculation according to the sampling voltage signals so as to obtain the temperature of the battery. According to the battery detection circuit provided by the invention, parameters such as pulse width and amplitude of the pulse voltage signals can be adjusted according to a controller, so that multiple times of sampling can be performed on the pulse voltage signals, and therefore, the obtained temperature of the battery can be more accurate; and the sampling voltage signals can be obtained through sampling the pulse voltage signals, so that the temperature of the battery can be obtained; and therefore, battery detection can be performed when a mobile phone is used and charged, and the battery detection circuit has the advantages of high security, very simple structure, low cost and easiness in implementation.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of battery detection circuit of mobile terminal, method and mobile terminal.
Background technology
At present, lithium ion battery has been widely used on the mobile terminal such as laptop computer, mobile phone, and the battery explosion produced repeatedly in recent years, cells burst, in the accident of being scalded by mobile phone, without exception, all has direct relation with battery.
In prior art, circuit is as shown in Figure 1 adopted as the detection of the battery of mobile phone to mobile terminal, by the comparer on baseband chip, the reference voltage on the voltage of thermistor on battery and sampling resistor R is compared, carry out detection of handset battery and whether should stop charging, further, also carrying out detection of handset battery temperature by interpolation ADC sample circuit is also mobile phone temp, but above-mentioned detection method is random large, the error of sampling is also larger, not very desirable to the Detection results of battery of mobile phone, and just just the temperature of battery of mobile phone is detected when mobile phone charges, and along with the development of smart mobile phone, performance is more and more powerful, the thing followed, the heating of smart mobile phone is more and more serious, and it is serious just not generate heat when mobile phone charges, consider from the angle of safety, fever phenomenon in smart mobile phone use procedure also needs to cause enough attention, need to detect exactly the battery of mobile phone under charging and using state.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of battery detection circuit of mobile terminal, method and mobile terminal, is intended to realize simple and easy and detect the battery of mobile terminal under charging and using state exactly.
In order to achieve the above object, the present invention proposes a kind of battery detection circuit of mobile terminal, and described mobile terminal comprises a processor and a battery, and this battery detection circuit comprises pulse module and sampling module, wherein:
Described processor sends a control signal to described pulse module, described pulse module produces pulse voltage signal to described battery according to described control signal, described sampling module gathers described pulse voltage signal and obtains sampled voltage signal, and described sampled voltage signal is sent to described processor, described processor calculates according to described sampled voltage signal and obtains battery temperature.
Preferably, described pulse module comprises a low pressure difference linear voltage regulator, a D/A, described D/A one end is connected with described processor, the described D/A other end is connected with the input end of described low pressure difference linear voltage regulator, and the output terminal of described low pressure difference linear voltage regulator is connected with described sampling module.
Preferably, be provided with a thermistor in described battery, one end of described thermistor is connected with described sampling module, and the other end of described thermistor is connected with described battery cathode; Described anode is connected with the power end of described low pressure difference linear voltage regulator, described battery cathode ground connection.
Preferably, described sampling module comprises one first resistance, a stabilivolt, described first resistance one end is connected with the output terminal of described low pressure difference linear voltage regulator, and the described first resistance other end is connected with the anode of described stabilivolt, and the negative electrode of described stabilivolt is connected with one end of described thermistor.
Preferably, the switch module for isolating described sampling module and described processor is also comprised.
Preferably, described switch module comprises one first diode, a field effect transistor, the grid of described field effect transistor is connected with described pulse module, the drain electrode of described field effect transistor is connected with described processor, the source electrode of described field effect transistor is connected with the anode of described stabilivolt, the anode of described first diode is connected with the source electrode of described field effect transistor, and the negative electrode of described first diode is connected with the drain electrode of described field effect transistor.
Preferably, the protection module for preventing processor damaged by surge is also comprised.
Preferably; described protection module comprises one second diode, one the 3rd diode; the anode of described second diode is connected with the anode of described 3rd diode, and the negative electrode of described 3rd diode is connected with the negative electrode of described stabilivolt, the plus earth of described second diode.
The present invention also proposes a kind of battery detection method of mobile terminal, comprising:
Described pulse module is sent a control signal to by described processor;
By described pulse module according to described control signal to battery input pulse voltage signal;
By sampling module, described pulse voltage signal is sampled, obtain sampled voltage signal, and described sampled voltage signal is sent to described processor;
Described processor calculates according to described sampled voltage signal and obtains battery temperature.
The present invention proposes again a kind of mobile terminal, comprises battery detection circuit as above.
A kind of battery detection circuit of mobile terminal that the present invention proposes, method and mobile terminal, the thermistor of pulse voltage signal to battery of mobile terminal that a pulse module sends default pulsewidth and predetermined amplitude is controlled by controller, by sampling module, described pulse voltage signal is sampled again, obtain sampled voltage signal, controller calculates according to described sampled voltage signal and obtains battery temperature, thus detects the battery of mobile terminal.Owing to can carry out the parameter such as pulsewidth and amplitude of regulating impulse voltage signal according to controller, therefore can carry out multiple repairing weld to described pulse voltage signal, make the battery temperature of acquisition more accurate; Sampled voltage signal again owing to obtaining by carrying out sampling to described pulse voltage signal obtains battery temperature, therefore can detect battery under mobile phone charging and using state, safer, and this circuit is very simple and easy, and cost is lower, is easy to realize.
Accompanying drawing explanation
Fig. 1 is battery detection circuit figure of the prior art;
Fig. 2 is the circuit diagram of battery detection circuit first embodiment of mobile terminal of the present invention;
Fig. 3 is the circuit diagram of battery detection circuit second embodiment of mobile terminal of the present invention;
Fig. 4 is the circuit diagram of battery detection circuit the 3rd embodiment of mobile terminal of the present invention;
Fig. 5 is the process flow diagram of the battery detection method preferred embodiment of mobile terminal of the present invention.
In order to make technical scheme of the present invention clearly, understand, be described in further detail below in conjunction with accompanying drawing.
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.
With reference to the circuit diagram that Fig. 2, Fig. 2 are the battery detection circuits of first embodiment of the invention mobile terminal.
Present pre-ferred embodiments proposes a kind of battery detection circuit of mobile terminal, and described mobile terminal comprises processor 1 and a battery 2, and this battery detection circuit comprises pulse module 3 and sampling module 4, wherein:
Described processor 1 sends a control signal to described pulse module 3, described pulse module 3 produces pulse voltage signal to described battery 2 according to described control signal, described sampling module 4 gathers described pulse voltage signal and obtains sampled voltage signal, and described sampled voltage signal is sent to described processor 1, described processor 1 calculates the temperature obtaining battery 2 according to described sampled voltage signal.
Particularly, above-mentioned pulse module 3 comprises low pressure difference linear voltage regulator 31, D/A 32 and a control interface 33, control interface 33 can be parallel interface or serial line interface, described D/A 32 one end is connected with described processor 1 by parallel interface 33, described D/A 32 other end is connected with the input end of described low pressure difference linear voltage regulator 31, and the output terminal of described low pressure difference linear voltage regulator 31 is connected with described sampling module 4.
Above-mentioned sampling module 4 comprises an one first resistance R1 and stabilivolt ZD, and described first resistance R1 one end is connected with the output terminal of described pulse module 3 mesolow difference linear constant voltage regulator 31, and the described first resistance R1 other end is connected with the anode of described stabilivolt ZD.Be provided with a thermistor R2 in described battery 2, one end of described thermistor R2 is connected with the negative electrode of described stabilivolt ZD, and the other end of described thermistor R2 is connected with the negative pole VBAT-of described battery 2.The positive pole VBAT+ of described battery 2 is connected with the power end of described pulse module 3 mesolow difference linear constant voltage regulator 31, the negative pole VBAT-ground connection of described battery 2.
As shown in Figure 2, described battery 2 is that the low pressure difference linear voltage regulator 31 in pulse module 3 is powered, ensure that low pressure difference linear voltage regulator 31 can normally work, processor 1 sends a control signal by control interface 33 to pulse module 3, this control signal is sent to low pressure difference linear voltage regulator 31 through D/A 32, control low pressure difference linear voltage regulator 31 and export the pulse voltage Vo that presets pulsewidth and predetermined amplitude, the value of pulse voltage Vo can fluctuate in the scope preset.Under normal circumstances, pulse voltage Vo ground connection after the thermistor R2 in the first resistance R1, stabilivolt ZD and battery 2 that pulse module 3 exports, forms path.The conduction voltage drop of setting stabilivolt ZD is △ V, then now, sampling module 4 is by the i point sampling voltage Vi=(Vo-△ V of the first resistance R1, the collection of stabilivolt ZD dividing potential drop) * R2/ (R1+R2)+△ V=(R2*Vo+R1* △ V)/(R1+R2).
Further, can by the size of the default pulsewidth T of processor 1 gating pulse module 3, thus control within the time period of default pulsewidth T, the pulse voltage Vo that paired pulses module 3 exports carries out several times sampling, sampling number can set according to actual needs, as carried out N sampling in default pulsewidth T, sampled value is Vi1, Vi2, Vi3 ... ViN, the sampled voltage Vi that then sampling module 4 gathers gets the mean value of N sampling, Vi=(Vi1+Vi2+Vi3 ... ViN)/N, like this, through multiple repairing weld, the sampled value in default pulsewidth T can be obtained more accurately, also the temperature detecting battery 2 is more accurately conducive to.
Get in default pulsewidth T after accurate sampled value Vi, according to Vi=(R2*Vo+R1* △ V)/(R1+R2), R2=(Vi+ △ V can be obtained) * R1/ (Vo-Vi).In the present embodiment, thermistor R2 is described for NTC resistance, and certainly, also not limiting thermistor R2 is other types, as PTC resistance etc.; Then in known battery 2, the characteristic of thermistor R2 is: R2=R0*expB (1/K-1/K0).Then there is (Vi+ △ V) * R1/ (Vo-Vi)=R0*expB (1/K-1/K0), be out of shape ln{ (R1/R0* (Vi-△ V)/(Vo-Vi) }=B (1/K-1/K0), wherein, R0 be absolute zero and K0 time thermistor R2 value, then R0, K0 are known quantity, B is constant, therefore, in above formula, K value can be tried to achieve by the size of sampled value Vi and pulse voltage Vo, and K=C+273.15, then above formula can be further converted to:
ln{(R1/R0*(Vi-△V)/(Vo-Vi)}=B{1/(C+273.15)-1/(C0+273.15)} （1）
The then sampled voltage Vi that gathers according to sampling module 4 of processor 1 and pulse voltage Vo, the real time temperature C obtaining thermistor R2 in battery 2 can be calculated by formula (1), also be the temperature of battery 2, and battery is as the major heat producing components of mobile phone, namely the temperature of battery 2 also can be considered the working temperature of mobile phone.
After obtaining the real time temperature C of thermistor R2 in battery 2, also adjust default pulsewidth T, the amplitude Vo of pulse module 3 output pulse signal and the size of sampling number N by processor 1, thus the temperature C obtained under multiple different sampled value Vi, again analyzing and processing is carried out to multiple temperature C, as the operation such as averaged, to obtain mobile phone working temperature the most accurately in Preset Time, thus realize detecting exactly the battery of mobile phone under charging and using state.
In addition, processor 1 gets mobile phone the most accurately after working temperature C, analyzing and processing can be carried out according to working temperature C, as can when the working temperature C of mobile phone be greater than preset temperature, warning prompt information is sent to user, prompting user current phone working temperature is too high, and adding users uses the security of mobile phone.Also can analyze according to the working temperature gathering mobile phone in user's each time period the operating habit that user uses mobile phone, operating habit according to user formulates personalized mobile phone control program, period as higher in user mobile phone working temperature closes some background programs automatically, the operation etc. of some cleaned systems is carried out, to the experience of user hommization and intellectuality more in the period that user mobile phone working temperature is lower.
And when the i point sampling voltage Vi that sampling module 4 gathers is equal with the pulse voltage Vo that pulse module 3 exports, the pulse voltage Vo that pulse module 3 exports and the first resistance R1 is then described, thermistor R2 in stabilivolt ZD and battery 2 does not form path, namely thermistor R2 does not access this testing circuit, be identified as thermistor R2 abnormal, when in processor 1, the thermistor R2 frequency of abnormity of record is more than or equal to 2, then point out current thermistor R2 abnormal to user, cannot detect current phone temperature, corresponding operation is made to point out user, thermistor R2 is normally linked in testing circuit, ensure to detect mobile phone temp in real time.
The present embodiment can carry out the parameters such as the pulsewidth of pulse voltage signal that regulating and controlling pulse module 3 exports and amplitude according to controller 1, therefore can carry out multiple repairing weld to described pulse voltage signal, make battery 2 temperature of acquisition more accurate; Again due to by real time to described pulse voltage signal carry out sample obtain sampled voltage signal obtain battery 2 temperature, therefore all can detect battery under mobile phone charging and using state, safer, and this circuit is very simple and easy, cost is lower, is easy to realize.
As shown in Figure 3, Fig. 3 is the circuit diagram of battery detection circuit second embodiment of mobile terminal of the present invention, on the basis of above-mentioned first embodiment, also comprises the switch module 5 for isolating described sampling module 4 and described processor 1.
Described switch module 5 comprises one first diode D1, one field effect transistor 51, in the present embodiment, field effect transistor 51 is preferably N channel enhancement field effect transistor, the grid G of described field effect transistor 51 is connected with the output terminal of low pressure difference linear voltage regulator 31 described in described pulse module 3, the drain D of described field effect transistor 51 is connected with described processor 1, the source S of described field effect transistor 51 is connected with the anode of described stabilivolt ZD, the anode of described first diode D1 is connected with the source S of described field effect transistor 51, the negative electrode of described first diode D1 is connected with the drain D of described field effect transistor 51.
Under normal circumstances, pulse voltage Vo ground connection after the thermistor R2 in the first resistance R1, stabilivolt ZD and battery 2 that pulse module 3 exports, form path, the then grid G voltage VG=Vo of described field effect transistor 51, the source S voltage VS=sampled voltage Vi of described field effect transistor 51, Vo>Vi, when the pressure reduction VGS of field effect transistor 51 grid G and source S is greater than the turn-on threshold of described field effect transistor 51, then, processor 1 obtains sampled voltage Vi by described field effect transistor 51; And when thermistor R2 is abnormal, Vo=Vi, then described field effect transistor 51 is ended, processor 1 obtains sampled voltage Vi, like this, by switch module 5 by described first diode D1, pulse module 3 pulse voltage signal exported and the sampled voltage signal being input to processor 1 are effectively isolated, avoid the mutual interference of pulse voltage signal and sampled voltage signal, thus improve the accuracy of sampled voltage, and then improve the accuracy to battery detecting.
As shown in Figure 4, Fig. 4 is the circuit diagram of battery detection circuit the 3rd embodiment of mobile terminal of the present invention, on the basis of above-mentioned second embodiment, also comprises the protection module 6 for preventing processor 1 from damaging by surge.
Described protection module 6 comprises one second diode D2, one the 3rd diode D3; the anode of described second diode D2 is connected with the anode of described 3rd diode D3; the negative electrode of described 3rd diode D3 is connected with the negative electrode of described stabilivolt ZD, the plus earth of described second diode D2.
Described protection module 6 can prevent from, because the electrostatic interaction of battery 2 and battery 2 connect the surge that produces instantaneously to the damage of processor 1, ensure that the safety of processor 1, making whole detection system more stable effectively.
As shown in Figure 5, present pre-ferred embodiments proposes a kind of battery detection method of mobile terminal, comprising:
Step S101, sends a control signal to described pulse module by described processor;
Described battery 2 is that the low pressure difference linear voltage regulator 31 in pulse module 3 is powered, ensure that low pressure difference linear voltage regulator 31 can normally work, processor 1 sends a control signal by control interface 33 to pulse module 3, and this control signal is sent to low pressure difference linear voltage regulator 31 through D/A 32.
Step S102, by described pulse module according to described control signal to battery input pulse voltage signal;
Low pressure difference linear voltage regulator 31 in pulse module 3 exports according to described control signal the pulse voltage Vo that presets pulsewidth and predetermined amplitude, and the value of pulse voltage Vo can fluctuate in the scope preset.Under normal circumstances, pulse voltage Vo ground connection after the thermistor R2 in the first resistance R1, stabilivolt ZD and battery 2 that pulse module 3 exports, forms path.
Step S103, is sampled to described pulse voltage signal by sampling module, obtains sampled voltage signal, and described sampled voltage signal is sent to described processor;
The conduction voltage drop of setting stabilivolt ZD is △ V, then now, sampling module 4 is by the i point sampling voltage Vi=(Vo-△ V of the first resistance R1, the collection of stabilivolt ZD dividing potential drop) * R2/ (R1+R2)+△ V=(R2*Vo+R1* △ V)/(R1+R2).
Further, can by the size of the default pulsewidth T of processor 1 gating pulse module 3, thus control within the time period of default pulsewidth T, the pulse voltage Vo that paired pulses module 3 exports carries out several times sampling, sampling number can set according to actual needs, as carried out N sampling in default pulsewidth T, sampled value is Vi1, Vi2, Vi3 ... ViN, the sampled voltage Vi that then sampling module 4 gathers gets the mean value of N sampling, Vi=(Vi1+Vi2+Vi3 ... ViN)/N, like this, through multiple repairing weld, the sampled value in default pulsewidth T can be obtained more accurately, also the temperature detecting battery 2 is more accurately conducive to.
Step S104, described processor calculates according to described sampled voltage signal and obtains battery temperature.
After getting the interior accurate sampled value Vi of default pulsewidth T, according to Vi=(R2*Vo+R1* △ V)/(R1+R2), R2=(Vi+ △ V can be obtained) * R1/ (Vo-Vi), and the characteristic of thermistor R2 is in known battery 2: R2=R0*expB (1/K-1/K0), then there is (Vi+ △ V) * R1/ (Vo-Vi)=R0*expB (1/K-1/K0), be out of shape ln{ (R1/R0* (Vi-△ V)/(Vo-Vi) }=B (1/K-1/K0), wherein, R0 be absolute zero and K0 time thermistor R2 value, then R0, K0 is known quantity, B is constant, therefore, in above formula, K value can be tried to achieve by the size of sampled value Vi and pulse voltage Vo, and K=C+273.15, then above formula can be further converted to:
ln{(R1/R0*(Vi-△V)/(Vo-Vi)}=B{1/(C+273.15)-1/(C0+273.15)} （1）
The then sampled voltage Vi that gathers according to sampling module 4 of processor 1 and pulse voltage Vo, the real time temperature C obtaining thermistor R2 in battery 2 can be calculated by formula (1), also be the temperature of battery 2, and battery is as the major heat producing components of mobile phone, the temperature of battery 2 is also the working temperature of mobile phone.
After obtaining the real time temperature C of thermistor R2 in battery 2, also adjust default pulsewidth T, the amplitude Vo of pulse module 3 output pulse signal and the size of sampling number N by processor 1, thus the temperature C obtained under multiple different sampled value Vi, again analyzing and processing is carried out to multiple temperature C, as the operation such as averaged, to obtain mobile phone working temperature the most accurately in Preset Time, thus realize detecting exactly the battery of mobile phone under charging and using state.
In addition, processor 1 gets mobile phone the most accurately after working temperature C, analyzing and processing can be carried out according to working temperature C, as can when the working temperature C of mobile phone be greater than preset temperature, warning prompt information is sent to user, prompting user current phone working temperature is too high, and adding users uses the security of mobile phone.Also can analyze according to the working temperature gathering mobile phone in user's each time period the operating habit that user uses mobile phone, operating habit according to user formulates personalized mobile phone control program, period as higher in user mobile phone working temperature closes some background programs automatically, the operation etc. of some cleaned systems is carried out, to the experience of user hommization and intellectuality more in the period that user mobile phone working temperature is lower.
And when the i point sampling voltage Vi that sampling module 4 gathers is equal with the pulse voltage Vo that pulse module 3 exports, the pulse voltage Vo that pulse module 3 exports and the first resistance R1 is then described, thermistor R2 in stabilivolt ZD and battery 2 does not form path, namely thermistor R2 does not access this testing circuit, be identified as thermistor R2 abnormal, when in processor 1, the thermistor R2 frequency of abnormity of record is more than or equal to 2, then point out current thermistor R2 abnormal to user, cannot detect current phone temperature, corresponding operation is made to point out user, thermistor R2 is normally linked in testing circuit, ensure to detect mobile phone temp in real time.
The present embodiment can carry out the parameters such as the pulsewidth of pulse voltage signal that regulating and controlling pulse module 3 exports and amplitude according to controller 1, therefore can carry out multiple repairing weld to described pulse voltage signal, make battery 2 temperature of acquisition more accurate; Again due to by real time to described pulse voltage signal carry out sample obtain sampled voltage signal obtain battery 2 temperature, therefore all can detect battery under mobile phone charging and using state, safer, and this circuit is very simple and easy, cost is lower, is easy to realize.
Present pre-ferred embodiments also proposes a kind of mobile terminal, and this mobile terminal comprises the battery detection circuit of above-mentioned processor and mobile terminal, can refer to above-described embodiment, do not repeat them here the Cleaning Principle of battery and flow process.Owing to have employed the battery detection circuit of above-mentioned mobile terminal, this mobile terminal accurately can detect battery under charging and using state, safer.This mobile terminal can be mobile phone, panel computer etc.
The battery detection circuit of mobile terminal that the present invention proposes, method and mobile terminal, the thermistor of pulse voltage signal to battery of mobile terminal that a pulse module sends default pulsewidth and predetermined amplitude is controlled by controller, by sampling module, described pulse voltage signal is sampled again, obtain sampled voltage signal, controller calculates according to described sampled voltage signal and obtains battery temperature, thus detects the battery of mobile terminal.Owing to can carry out the parameter such as pulsewidth and amplitude of regulating impulse voltage signal according to controller, therefore can carry out multiple repairing weld to described pulse voltage signal, make the battery temperature of acquisition more accurate; Sampled voltage signal again owing to obtaining by carrying out sampling to described pulse voltage signal obtains battery temperature, therefore can detect battery under mobile phone charging and using state, safer, and this circuit is very simple and easy, and cost is lower, is easy to realize.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a battery detection circuit for mobile terminal, described mobile terminal comprises a processor and a battery, it is characterized in that, this battery detection circuit comprises pulse module and sampling module, wherein:
Described processor sends a control signal to described pulse module, described pulse module produces pulse voltage signal to described battery according to described control signal, described sampling module gathers described pulse voltage signal and obtains sampled voltage signal, and described sampled voltage signal is sent to described processor, described processor calculates according to described sampled voltage signal and obtains battery temperature.
2. battery detection circuit according to claim 1, it is characterized in that, described pulse module comprises a low pressure difference linear voltage regulator, a D/A, described D/A one end is connected with described processor, the described D/A other end is connected with the input end of described low pressure difference linear voltage regulator, and the output terminal of described low pressure difference linear voltage regulator is connected with described sampling module.
3. battery detection circuit according to claim 2, is characterized in that, is provided with a thermistor in described battery, and one end of described thermistor is connected with described sampling module, and the other end of described thermistor is connected with described battery cathode; Described anode is connected with the power end of described low pressure difference linear voltage regulator, described battery cathode ground connection.
4. battery detection circuit according to claim 3, it is characterized in that, described sampling module comprises one first resistance, a stabilivolt, described first resistance one end is connected with the output terminal of described low pressure difference linear voltage regulator, the described first resistance other end is connected with the anode of described stabilivolt, and the negative electrode of described stabilivolt is connected with one end of described thermistor.
5. battery detection circuit according to claim 1, is characterized in that, also comprises the switch module for isolating described sampling module and described processor.
6. battery detection circuit according to claim 5, it is characterized in that, described switch module comprises one first diode, a field effect transistor, the grid of described field effect transistor is connected with described pulse module, the drain electrode of described field effect transistor is connected with described processor, the source electrode of described field effect transistor is connected with the anode of described stabilivolt, and the anode of described first diode is connected with the source electrode of described field effect transistor, and the negative electrode of described first diode is connected with the drain electrode of described field effect transistor.
7. battery detection circuit according to claim 1, is characterized in that, also comprises the protection module for preventing processor damaged by surge.
8. battery detection circuit according to claim 7; it is characterized in that; described protection module comprises one second diode, one the 3rd diode; the anode of described second diode is connected with the anode of described 3rd diode; the negative electrode of described 3rd diode is connected with the negative electrode of described stabilivolt, the plus earth of described second diode.
9. a battery detection method for mobile terminal, is characterized in that, comprising:
Described pulse module is sent a control signal to by described processor;
By described pulse module according to described control signal to battery input pulse voltage signal;
By sampling module, described pulse voltage signal is sampled, obtain sampled voltage signal, and described sampled voltage signal is sent to described processor;
Described processor calculates according to described sampled voltage signal and obtains battery temperature.
10. a mobile terminal, is characterized in that, comprises the battery detection circuit according to any one of claim 1-8.
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| CN201310374049.9A CN104422541B (en) | 2013-08-23 | 2013-08-23 | Battery detection circuit, method and the mobile terminal of mobile terminal |
| PCT/CN2014/083932 WO2015024454A1 (en) | 2013-08-23 | 2014-08-07 | Battery detection circuit and method for mobile terminal, and mobile terminal |
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| CN201310374049.9A CN104422541B (en) | 2013-08-23 | 2013-08-23 | Battery detection circuit, method and the mobile terminal of mobile terminal |
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| CN104714184B (en) * | 2015-03-12 | 2017-11-10 | 惠州Tcl移动通信有限公司 | Battery ID and the detection means and method of battery temperature are detected by single pin |
| CN106549438A (en) * | 2016-10-31 | 2017-03-29 | 北京小米移动软件有限公司 | A kind of battery temperature measure and control device, method and mobile terminal |
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| CN102183315A (en) * | 2011-02-28 | 2011-09-14 | 惠州Tcl移动通信有限公司 | Circuit and method for detecting identity (ID) and temperature of battery by using common detection pin |
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| JP2012247218A (en) * | 2011-05-25 | 2012-12-13 | Mitsumi Electric Co Ltd | Temperature measuring system |
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| US20090153103A1 (en) * | 2007-12-18 | 2009-06-18 | Mitsumi Electric Co., Ltd | Portable Device and Battery Pack for the Same |
| CN201303364Y (en) * | 2008-04-22 | 2009-09-02 | 中兴通讯股份有限公司 | Temperature monitoring module of mobile terminal battery and high-temperature monitoring circuit of mobile terminal battery |
| CN101771428A (en) * | 2010-01-19 | 2010-07-07 | 青岛海信移动通信技术股份有限公司 | Temperature detection circuit and mobile communication equipment |
| CN102183315A (en) * | 2011-02-28 | 2011-09-14 | 惠州Tcl移动通信有限公司 | Circuit and method for detecting identity (ID) and temperature of battery by using common detection pin |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105510840A (en) * | 2015-12-18 | 2016-04-20 | 天津大学 | Pulse width selection method applied to high precision state of charge estimation |
| CN105510840B (en) * | 2015-12-18 | 2018-08-07 | 天津大学 | Pulse width choosing method applied to the estimation of high-precision state-of-charge |
| CN110176639A (en) * | 2019-04-19 | 2019-08-27 | 陈明 | A kind of lead-acid batteries based on Internet of Things, cloud platform remotely monitor and online repair system |
| CN113721146A (en) * | 2020-05-12 | 2021-11-30 | 华为技术有限公司 | Automatic shutdown method, device, terminal and storage medium |
| CN113721146B (en) * | 2020-05-12 | 2023-04-07 | 华为技术有限公司 | Automatic shutdown method, device, terminal and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015024454A1 (en) | 2015-02-26 |
| CN104422541B (en) | 2019-02-26 |
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