CN104422541B - Battery detection circuit, method and the mobile terminal of mobile terminal - Google Patents
Battery detection circuit, method and the mobile terminal of mobile terminal Download PDFInfo
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- CN104422541B CN104422541B CN201310374049.9A CN201310374049A CN104422541B CN 104422541 B CN104422541 B CN 104422541B CN 201310374049 A CN201310374049 A CN 201310374049A CN 104422541 B CN104422541 B CN 104422541B
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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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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention discloses battery detection circuit, method and the mobile terminal of a kind of mobile terminal, the mobile terminal includes a processor and a battery, the battery detection circuit includes pulse module and sampling module, wherein: processor sends a control signal to the pulse module, pulse module generates pulse voltage signal to battery according to control signal, sampling module acquisition pulse voltage signal obtains sampled voltage signal, and sampled voltage signal is sent to processor, processor calculates according to sampled voltage signal and obtains battery temperature.The parameters such as pulsewidth and amplitude of the present invention due to that can adjust pulse voltage signal according to controller, energy pulse voltage signal carry out multiple repairing weld, keep the battery temperature obtained more accurate；Battery temperature is obtained due to carrying out the sampled voltage signal of sampling acquisition by pulse voltage signal again, battery can be detected under mobile phone charging and use state, it is safer, and the circuit is very simple, cost is relatively low, it is easy to accomplish.
Description
Technical field
The present invention relates to mobile communication technology field more particularly to a kind of battery detection circuit of mobile terminal, method and
Mobile terminal.
Background technique
Currently, lithium ion battery has been widely used on the mobile terminals such as laptop computer, mobile phone, and it is quick-fried repeatedly in recent years
The battery explosion that has, cells burst in the accident scalded by mobile phone, without exception, all there is direct relationship with battery.
In the prior art, circuit as shown in Figure 1 is used as the detection of the battery of mobile phone to mobile terminal, passes through base
The voltage of thermistor on battery is compared by the comparator on microarray strip with the reference voltage on sampling resistor R, to detect
Whether battery of mobile phone, which should stop, being charged, further, moreover it is possible to detect temperature of cell phone battery by addition ADC sample circuit
That is mobile phone temp, but arbitrariness is also big for above-mentioned detection method, and the error of sampling is also larger, and the detection effect to battery of mobile phone is not very
Ideal, and only just the temperature of battery of mobile phone is being detected when the mobile phone is charging, and with the continuous development of smart phone, property
Can be more and more powerful, following, the fever of smart phone is increasingly severe, and is more than tight in fever when the mobile phone is charging
Weight, considers, the fever phenomenon in smart phone use process is also required to cause enough attention, needs opponent from a safety viewpoint
Battery of the machine under charging and use state is accurately detected.
Summary of the invention
The main purpose of the present invention is to provide a kind of battery detection circuit of mobile terminal, method and mobile terminal, purports
It is realizing simple and accurately battery of the mobile terminal under charging and use state is being detected.
In order to achieve the above object, the present invention proposes a kind of battery detection circuit of mobile terminal, the mobile terminal packet
A processor and a battery are included, which includes pulse module and sampling module, in which:
The processor sends a control signal to the pulse module, and the pulse module is generated according to the control signal
To the battery, the sampling module acquires the pulse voltage signal and obtains sampled voltage signal pulse voltage signal, and will
The sampled voltage signal is sent to the processor, and the processor calculates according to the sampled voltage signal and obtains battery temperature
Degree.
Preferably, the pulse module includes a low pressure difference linear voltage regulator, a D/A converter, the D/A switch
Device one end is connected to the processor, and the input terminal of the D/A converter other end and the low pressure difference linear voltage regulator connects
It connects, the output end of the low pressure difference linear voltage regulator is connect with the sampling module.
Preferably, a thermistor is equipped in the battery, one end of the thermistor is connect with the sampling module,
The other end of the thermistor is connect with the battery cathode；The electricity of the anode and the low pressure difference linear voltage regulator
Source connection, the battery cathode ground connection.
Preferably, the sampling module includes a first resistor, a voltage-stabiliser tube, described first resistor one end and the low pressure
The output end of difference linear constant voltage regulator connects, and the first resistor other end is connect with the anode of the voltage-stabiliser tube, the voltage-stabiliser tube
Cathode connect with one end of the thermistor.
Preferably, further include switch module for the sampling module Yu the processor to be isolated.
Preferably, the switch module includes a first diode, a field-effect tube, the grid of the field-effect tube and institute
Pulse module connection is stated, the drain electrode of the field-effect tube is connected to the processor, the source electrode of the field-effect tube and described steady
The anode of pressure pipe connects, and the anode of the first diode is connect with the source electrode of the field-effect tube, the first diode
Cathode is connect with the drain electrode of the field-effect tube.
Preferably, further include protective module for preventing processor from being damaged by surge.
Preferably, the protective module includes one second diode, a third diode, the anode of second diode
It being connect with the anode of the third diode, the cathode of the third diode is connect with the cathode of the voltage-stabiliser tube, and described
The minus earth of two diodes.
The present invention also proposes a kind of battery detection method of mobile terminal, comprising:
The pulse module is sent a control signal to by the processor；
From the pulse module according to the control signal to battery input pulse voltage signal；
The pulse voltage signal is sampled by sampling module, obtains sampled voltage signal, and by the sampling
Voltage signal is sent to the processor；
The processor calculates according to the sampled voltage signal and obtains battery temperature.
The present invention proposes a kind of mobile terminal, including battery detection circuit as described above again.
Battery detection circuit, method and the mobile terminal of a kind of mobile terminal proposed by the present invention, by processor control one
Pulse module sends the thermistor for presetting the pulse voltage signal of pulsewidth and predetermined amplitude to battery of mobile terminal, then by sampling
Module samples the pulse voltage signal, obtains sampled voltage signal, processor is according to the sampled voltage signal meter
It calculates and obtains battery temperature, so that the battery to mobile terminal detects.Since pulse voltage letter can be adjusted according to processor
Number pulsewidth and the parameters such as amplitude, therefore multiple repairing weld can be carried out to the pulse voltage signal, make the battery temperature obtained more
Add accurate；Again due to obtaining battery temperature by the sampled voltage signal for carrying out sampling acquisition to the pulse voltage signal,
Therefore can charge in mobile phone and use state under battery is detected, it is safer, and the circuit is very simple, cost compared with
It is low, it is easy to accomplish.
Detailed description of the invention
Fig. 1 is battery detection circuit figure in the prior art；
Fig. 2 is the circuit diagram of the battery detection circuit first embodiment of mobile terminal of the present invention；
Fig. 3 is the circuit diagram of the battery detection circuit second embodiment of mobile terminal of the present invention；
Fig. 4 is the circuit diagram of the battery detection circuit 3rd embodiment of mobile terminal of the present invention；
Fig. 5 is the flow chart of the battery detection method preferred embodiment of mobile terminal of the present invention.
In order to keep technical solution of the present invention clearer, clear, it is described in further detail below in conjunction with attached drawing.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Referring to Fig. 2, Fig. 2 is the circuit diagram of the battery detection circuit of first embodiment of the invention mobile terminal.
Present pre-ferred embodiments propose that a kind of battery detection circuit of mobile terminal, the mobile terminal include a processing
Device 1 and a battery 2, the battery detection circuit include pulse module 3 and sampling module 4, in which:
The processor 1 sends a control signal to the pulse module 3, and the pulse module 3 is according to the control signal
Pulse voltage signal is generated to the battery 2, the sampling module 4 acquires the pulse voltage signal and obtains sampled voltage letter
Number, and the sampled voltage signal is sent to the processor 1, the processor 1 is calculated according to the sampled voltage signal
Obtain the temperature of battery 2.
Specifically, above-mentioned pulse module 3 includes that a low pressure difference linear voltage regulator 31, a D/A converter 32 and control connect
Mouthfuls 33, control interface 33 can be parallel interface or serial line interface, described 32 one end of D/A converter by parallel interface 33 with
The processor 1 connects, and 32 other end of D/A converter is connect with the input terminal of the low pressure difference linear voltage regulator 31,
The output end of the low pressure difference linear voltage regulator 31 is connect with the sampling module 4.
Above-mentioned sampling module 4 includes an a first resistor R1 and voltage-stabiliser tube ZD, the one end the first resistor R1 and the arteries and veins
The output end of 3 mesolow difference linear constant voltage regulator 31 of die block connects, and the first resistor R1 other end is with the voltage-stabiliser tube ZD's
Anode connection.A thermistor R2, the cathode of one end of the thermistor R2 and the voltage-stabiliser tube ZD are equipped in the battery 2
Connection, the other end of the thermistor R2 are connect with the cathode VBAT- of the battery 2.The positive VBAT+ of the battery 2 with
The power end of the 3 mesolow difference linear constant voltage regulator 31 of pulse module connects, the cathode VBAT- ground connection of the battery 2.
As shown in Fig. 2, the battery 2 is the power supply of low pressure difference linear voltage regulator 31 in pulse module 3, guarantee low voltage difference line
Property voltage-stablizer 31 can work normally, processor 1 by control interface 33 to pulse module 3 send one control signal, the control letter
Number low pressure difference linear voltage regulator 31 is sent to through D/A converter 32, control low pressure difference linear voltage regulator 31 exports a default arteries and veins
The value of wide and predetermined amplitude pulse voltage Vo, pulse voltage Vo can fluctuate in default range.Under normal circumstances, pulse mode
The pulse voltage Vo that block 3 exports is grounded after the thermistor R2 in first resistor R1, voltage-stabiliser tube ZD and battery 2, forms access.
The conduction voltage drop of voltage-stabiliser tube ZD is set as △ V, then at this point, sampling module 4 passes through first resistor R1, voltage-stabiliser tube ZD partial pressure acquisition
I point sampling voltage Vi=(Vo- △ V) * R2/ (R1+R2)+△ V=(R2*Vo+R1* △ V)/(R1+R2).
Further, the size that the default pulsewidth T of pulse module 3 can be controlled by processor 1, so that control is in default pulsewidth
In the period of T, the pulse voltage Vo exported to pulse module 3 is sampled several times, and sampling number can be according to actual needs
It is set, n times sampling is carried out such as in default pulsewidth T, sampled value Vi1, Vi2, Vi3 ... ViN, then sampling module 4 is adopted
The average value that the sampled voltage Vi of collection takes n times to sample, Vi=(Vi1+Vi2+Vi3 ... ViN)/N, in this way, by multiple repairing weld,
Sampled value in the default pulsewidth T of acquisition that can be more accurate, is also beneficial to the more accurate temperature for detecting battery 2.
It gets in default pulsewidth T after accurate sampled value Vi, according to Vi=(R2*Vo+R1* △ V)/(R1+R2), can obtain
To R2=(Vi+ △ V) * R1/ (Vo-Vi).In the present embodiment, thermistor R2 is illustrated by taking NTC resistance as an example, certainly,
Thermistor R2 is not limited as other types, such as PTC resistor；Then know the characteristic of thermistor R2 in battery 2 are as follows: R2=
R0*expB(1/K-1/K0).Then there is (Vi+ △ V) * R1/ (Vo-Vi)=R0*expB (1/K-1/K0), deforms to obtain ln { (R1/R0*
(Vi- △ V)/(Vo-Vi) }=B (1/K-1/K0), wherein the value of thermistor R2 when R0 is absolute zero, that is, K0, then R0, K0
It is known quantity, B is constant, therefore, in above formula, K value can be acquired 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) then processor
The 1 sampled voltage Vi and pulse voltage Vo acquired according to sampling module 4, can be calculated by formula (1) and obtain temperature-sensitive in battery 2
The real time temperature C of resistance R2 namely the temperature of battery 2, and major heat producing components of the battery as mobile phone, the temperature of battery 2
It can be considered the operating temperature of mobile phone.
It obtains in battery 2 after the real time temperature C of thermistor R2, can also adjust pulse module 3 by processor 1 and export arteries and veins
The default pulsewidth T of signal, the size of amplitude Vo and sampling number N are rushed, so that the temperature C under multiple and different sampled value Vi is obtained,
Multiple temperature C are analyzed and processed again, such as operation of averaging, are most accurately worked temperature with obtaining mobile phone in preset time
Degree accurately detects battery of the mobile phone under charging and use state to realize.
In addition, can be carried out at analysis according to operating temperature C after processor 1 gets the most accurate operating temperature C of mobile phone
Reason such as can send warning message to user, user is prompted to work as remote holder when the operating temperature C of mobile phone is greater than preset temperature
Machine operating temperature is excessively high, increases the safety that user uses mobile phone.It can also be according to the work of mobile phone in acquisition user's each period
Temperature analyzes the operating habit that user uses mobile phone, and depending on the user's operation habit formulates personalized mobile phone control program,
Several background programs such as are automatically closed in the user mobile phone operating temperature higher period, when user mobile phone operating temperature is lower
The operation etc. of some cleaned systems of Duan Jinhang, the experience to user are more humanized and intelligent.
And when the i point sampling voltage Vi that sampling module 4 acquires is equal with the pulse voltage Vo that pulse module 3 exports, then
Illustrate that the pulse voltage Vo and thermistor R2 in first resistor R1, voltage-stabiliser tube ZD and battery 2 that pulse module 3 exports does not have shape
At access, i.e. thermistor R2 does not access the detection circuit, thermistor R2 exception is identified as, when what is recorded in processor 1
When thermistor R2 frequency of abnormity is more than or equal to 2, then current thermistor R2 exception is prompted the user with, it can not be to current phone temperature
Degree is detected, and to prompt user to make corresponding operation, is linked into thermistor R2 normally in detection circuit, is guaranteed real-time
Mobile phone temp is detected on ground.
The present embodiment can control to adjust the pulsewidth and width of the pulse voltage signal of the output of pulse module 3 according to processor 1
The parameters such as degree, therefore multiple repairing weld can be carried out to the pulse voltage signal, keep 2 temperature of battery obtained more accurate；And by
In obtaining 2 temperature of battery by the sampled voltage signal for carrying out sampling acquisition to the pulse voltage signal in real time, therefore
Battery can be detected under mobile phone charging and use state, it is safer, and the circuit is very simple, cost is relatively low,
It is easily achieved.
As shown in figure 3, Fig. 3 is the circuit diagram of the battery detection circuit second embodiment of mobile terminal of the present invention, above-mentioned
It further include the switch module 5 for the sampling module 4 and the processor 1 to be isolated on the basis of first embodiment.
The switch module 5 includes a first diode D1, a field-effect tube 51, and in the present embodiment, field-effect tube 51 is excellent
It is selected as N-channel enhancement mode FET, low pressure difference linearity described in the grid G of the field-effect tube 51 and the pulse module 3
The output end of voltage-stablizer 31 connects, and the drain D of the field-effect tube 51 is connect with the processor 1, the field-effect tube 51
Source S is connect with the anode of the voltage-stabiliser tube ZD, and the source S of the anode of the first diode D1 and the field-effect tube 51 connects
It connects, the cathode of the first diode D1 is connect with the drain D of the field-effect tube 51.
Under normal circumstances, the pulse voltage Vo that pulse module 3 exports is through in first resistor R1, voltage-stabiliser tube ZD and battery 2
It is grounded after thermistor R2, forms access, then the grid G voltage VG=Vo of the field-effect tube 51, the field-effect tube 51
Source S voltage VS=sampled voltage Vi, Vo > Vi, when the pressure difference VGS of 51 grid G of field-effect tube and source S is greater than the field-effect
The turn-on threshold of pipe 51, then, processor 1 obtain sampled voltage Vi by the field-effect tube 51；And when thermistor R2 is abnormal
When, Vo=Vi, then the field-effect tube 51 is ended, and processor 1 obtains sampled voltage Vi by the first diode D1, this
Sample has been effectively isolated the pulse voltage signal of the output of pulse module 3 and the sampling for being input to processor 1 by switch module 5
Voltage signal avoids interfering with each other for pulse voltage signal and sampled voltage signal, to improve the accurate of sampled voltage
Property, and then improve the accuracy to battery detecting.
As shown in figure 4, Fig. 4 is the circuit diagram of the battery detection circuit 3rd embodiment of mobile terminal of the present invention, above-mentioned
It further include the protective module 6 for preventing processor 1 from being damaged by surge on the basis of second embodiment.
The protective module 6 includes one second diode D2, a third diode D3, the anode of the second diode D2
It being connect with the anode of the third diode D3, the cathode of the third diode D3 is connect with the cathode of the voltage-stabiliser tube ZD,
The minus earth of the second diode D2.
The protective module 6 can be effectively prevented the surge connecting moment by the electrostatic interaction and battery 2 of battery 2 and generating
Damage to processor 1 ensure that the safety of processor 1, keep entire detection system more stable.
As shown in figure 5, present pre-ferred embodiments propose a kind of battery detection method of mobile terminal, comprising:
Step S101 sends a control signal to the pulse module by the processor；
The battery 2 is that the low pressure difference linear voltage regulator 31 in pulse module 3 is powered, and guarantees low pressure difference linear voltage regulator 31
It can work normally, processor 1 sends a control signal to pulse module 3 by control interface 33, which turns through D/A
Parallel operation 32 is sent to low pressure difference linear voltage regulator 31.
Step S102, from the pulse module according to the control signal to battery input pulse voltage signal；
Low pressure difference linear voltage regulator 31 in pulse module 3 exports a default pulsewidth and default width according to the control signal
The value of the pulse voltage Vo of degree, pulse voltage Vo can fluctuate in default range.Under normal circumstances, pulse module 3 exports
Pulse voltage Vo is grounded after the thermistor R2 in first resistor R1, voltage-stabiliser tube ZD and battery 2, forms access.
Step S103 samples the pulse voltage signal by sampling module, obtains sampled voltage signal, and will
The sampled voltage signal is sent to the processor；
The conduction voltage drop of voltage-stabiliser tube ZD is set as △ V, then at this point, sampling module 4 passes through first resistor R1, voltage-stabiliser tube ZD points
Press i point sampling voltage Vi=(Vo- △ V) * R2/ (R1+R2)+△ V=(R2*Vo+R1* △ V)/(R1+R2) of acquisition.
Further, the size that the default pulsewidth T of pulse module 3 can be controlled by processor 1, so that control is in default pulsewidth
In the period of T, the pulse voltage Vo exported to pulse module 3 is sampled several times, and sampling number can be according to actual needs
It is set, n times sampling is carried out such as in default pulsewidth T, sampled value Vi1, Vi2, Vi3 ... ViN, then sampling module 4 is adopted
The average value that the sampled voltage Vi of collection takes n times to sample, Vi=(Vi1+Vi2+Vi3 ... ViN)/N, in this way, by multiple repairing weld,
Sampled value in the default pulsewidth T of acquisition that can be more accurate, is also beneficial to the more accurate temperature for detecting battery 2.
Step S104, the processor calculate according to the sampled voltage signal and obtain battery temperature.
It gets in default pulsewidth T after accurate sampled value Vi, according to Vi=(R2*Vo+R1* △ V)/(R1+R2), can obtain
To R2=(Vi+ △ V) * R1/ (Vo-Vi), and in well known battery 2 thermistor R2 characteristic are as follows: R2=R0*expB (1/K-
1/K0), then have (Vi+ △ V) * R1/ (Vo-Vi)=R0*expB (1/K-1/K0), deform ln (R1/R0* (Vi- △ V)/
(Vo-Vi) }=B (1/K-1/K0), wherein the value of thermistor R2 when R0 is absolute zero, that is, K0, then R0, K0 are known
Amount, B is constant, therefore, in above formula, can acquire K value 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) then processor
The 1 sampled voltage Vi and pulse voltage Vo acquired according to sampling module 4, can be calculated by formula (1) and obtain temperature-sensitive in battery 2
The real time temperature C of resistance R2 namely the temperature of battery 2, and major heat producing components of the battery as mobile phone, the temperature of battery 2
The as operating temperature of mobile phone.
It obtains in battery 2 after the real time temperature C of thermistor R2, can also adjust pulse module 3 by processor 1 and export arteries and veins
The default pulsewidth T of signal, the size of amplitude Vo and sampling number N are rushed, so that the temperature C under multiple and different sampled value Vi is obtained,
Multiple temperature C are analyzed and processed again, such as operation of averaging, are most accurately worked temperature with obtaining mobile phone in preset time
Degree accurately detects battery of the mobile phone under charging and use state to realize.
In addition, can be carried out at analysis according to operating temperature C after processor 1 gets the most accurate operating temperature C of mobile phone
Reason such as can send warning message to user, user is prompted to work as remote holder when the operating temperature C of mobile phone is greater than preset temperature
Machine operating temperature is excessively high, increases the safety that user uses mobile phone.It can also be according to the work of mobile phone in acquisition user's each period
Temperature analyzes the operating habit that user uses mobile phone, and depending on the user's operation habit formulates personalized mobile phone control program,
Several background programs such as are automatically closed in the user mobile phone operating temperature higher period, when user mobile phone operating temperature is lower
The operation etc. of some cleaned systems of Duan Jinhang, the experience to user are more humanized and intelligent.
And when the i point sampling voltage Vi that sampling module 4 acquires is equal with the pulse voltage Vo that pulse module 3 exports, then
Illustrate that the pulse voltage Vo and thermistor R2 in first resistor R1, voltage-stabiliser tube ZD and battery 2 that pulse module 3 exports does not have shape
At access, i.e. thermistor R2 does not access the detection circuit, thermistor R2 exception is identified as, when what is recorded in processor 1
When thermistor R2 frequency of abnormity is more than or equal to 2, then current thermistor R2 exception is prompted the user with, it can not be to current phone temperature
Degree is detected, and to prompt user to make corresponding operation, is linked into thermistor R2 normally in detection circuit, is guaranteed real-time
Mobile phone temp is detected on ground.
The present embodiment can control to adjust the pulsewidth and width of the pulse voltage signal of the output of pulse module 3 according to processor 1
The parameters such as degree, therefore multiple repairing weld can be carried out to the pulse voltage signal, keep 2 temperature of battery obtained more accurate；And by
In obtaining 2 temperature of battery by the sampled voltage signal for carrying out sampling acquisition to the pulse voltage signal in real time, therefore
Battery can be detected under mobile phone charging and use state, it is safer, and the circuit is very simple, cost is relatively low,
It is easily achieved.
Present pre-ferred embodiments also propose a kind of mobile terminal, which includes above-mentioned processor and mobile terminal
Battery detection circuit, above-described embodiment can refer to the testing principle and process of battery, details are not described herein.Due to using
The battery detection circuit of above-mentioned mobile terminal, the mobile terminal can accurately examine battery under charging and use state
It surveys, it is safer.The mobile terminal can be mobile phone, tablet computer etc..
Battery detection circuit, method and the mobile terminal of mobile terminal proposed by the present invention control a pulse by processor
Module sends the thermistor for presetting the pulse voltage signal of pulsewidth and predetermined amplitude to battery of mobile terminal, then by sampling module
The pulse voltage signal is sampled, sampled voltage signal is obtained, processor is obtained according to sampled voltage signal calculating
Battery temperature is taken, so that the battery to mobile terminal detects.Since pulse voltage signal can be adjusted according to processor
The parameters such as pulsewidth and amplitude, therefore multiple repairing weld can be carried out to the pulse voltage signal, keep the battery temperature obtained more smart
Really；Again due to obtaining battery temperature by the sampled voltage signal for carrying out sampling acquisition to the pulse voltage signal,
Battery can be detected under mobile phone charging and use state, it is safer, and the circuit is very simple, cost is relatively low, easily
In realization.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure made by description of the invention and accompanying drawing content or process transformation, are applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (7)
1. a kind of battery detection circuit of mobile terminal, the mobile terminal includes a processor and a battery, which is characterized in that
The battery detection circuit includes pulse module and sampling module, in which:
The processor sends a control signal to the pulse module, and the pulse module generates pulse according to the control signal
To the battery, the sampling module acquires the pulse voltage signal and obtains sampled voltage signal voltage signal, and will be described
Sampled voltage signal is sent to the processor, and the processor calculates according to the sampled voltage signal and obtains battery temperature；
The pulse module includes a low pressure difference linear voltage regulator, a D/A converter, described D/A converter one end and institute
Processor connection is stated, the D/A converter other end is connect with the input terminal of the low pressure difference linear voltage regulator, the low pressure
The output end of difference linear constant voltage regulator is connect with the sampling module；
A thermistor is equipped in the battery, one end of the thermistor is connect with the sampling module, the temperature-sensitive electricity
The other end of resistance is connect with the battery cathode；The anode is connect with the power end of the low pressure difference linear voltage regulator,
The battery cathode ground connection；
The sampling module includes a first resistor, a voltage-stabiliser tube, described first resistor one end and the low pressure difference linearity pressure stabilizing
The output end of device connects, and the first resistor other end is connect with the anode of the voltage-stabiliser tube, the cathode of the voltage-stabiliser tube and institute
State one end connection of thermistor.
2. battery detection circuit according to claim 1, which is characterized in that further include for be isolated the sampling module with
The switch module of the processor.
3. battery detection circuit according to claim 2, which is characterized in that the switch module includes one the 1st pole
Pipe, a field-effect tube, the grid of the field-effect tube are connect with the pulse module, the drain electrode of the field-effect tube and the place
Manage device connection, the source electrode of the field-effect tube connect with the anode of the voltage-stabiliser tube, the anode of the first diode with it is described
The source electrode of field-effect tube connects, and the cathode of the first diode is connect with the drain electrode of the field-effect tube.
4. battery detection circuit according to claim 1, which is characterized in that further include for preventing processor from being damaged by surge
Bad protective module.
5. battery detection circuit according to claim 4, which is characterized in that the protective module includes one the 2nd 2 pole
Pipe, a third diode, the anode of second diode are connect with the anode of the third diode, the third diode
Cathode connect with the cathode of the voltage-stabiliser tube, the minus earth of second diode.
6. a kind of battery detection method of mobile terminal, the mobile terminal includes one battery of a processor, which is characterized in that institute
Stating mobile terminal further includes battery detection circuit, which includes pulse module and sampling module, comprising:
The pulse module is sent a control signal to by the processor, wherein the pulse module includes a low voltage difference line
Property voltage-stablizer, a D/A converter, described D/A converter one end are connected to the processor, and the D/A converter is another
One end is connect with the input terminal of the low pressure difference linear voltage regulator, the output end of the low pressure difference linear voltage regulator and the sampling
Module connection；
The control signal is sent to the low pressure difference linear voltage regulator through the D/A converter, controls the low voltage difference line
Property voltage-stablizer export the pulse voltage signal of default pulsewidth and predetermined amplitude；
The pulse voltage signal is sampled by the sampling module, obtains sampled voltage signal, and by the sampling
Voltage signal is sent to the processor, wherein a thermistor, one end of the thermistor and institute are equipped in the battery
Sampling module connection is stated, the other end of the thermistor is connect with the battery cathode；The sampling module includes one first
Resistance, a voltage-stabiliser tube, described first resistor one end are connect with the output end of the low pressure difference linear voltage regulator, the first resistor
The other end is connect with the anode of the voltage-stabiliser tube, and the cathode of the voltage-stabiliser tube is connect with one end of the thermistor, the arteries and veins
It rushes voltage signal to be grounded after the thermistor in the first resistor, voltage-stabiliser tube and battery, forms access, the sampling module
Sampled voltage signal is obtained by first resistor, voltage-stabiliser tube partial pressure；
The processor calculates according to the sampled voltage signal and the pulse voltage signal and obtains battery temperature.
7. a kind of mobile terminal, which is characterized in that including battery detection circuit of any of claims 1-5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| CN113721146B (en) * | 2020-05-12 | 2023-04-07 | 华为技术有限公司 | Automatic shutdown method, device, terminal and storage medium |
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| 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 |
| JP2012208055A (en) * | 2011-03-30 | 2012-10-25 | Panasonic Corp | Battery temperature detecting device |
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| JP2009153238A (en) * | 2007-12-18 | 2009-07-09 | Mitsumi Electric Co Ltd | Portable device and battery pack used for the same |
| JP2012247218A (en) * | 2011-05-25 | 2012-12-13 | Mitsumi Electric Co Ltd | Temperature measuring system |
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| 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 |
| JP2012208055A (en) * | 2011-03-30 | 2012-10-25 | Panasonic Corp | Battery temperature detecting device |
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| CN104422541A (en) | 2015-03-18 |
| WO2015024454A1 (en) | 2015-02-26 |
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