CN105372602A - Battery remaining capacity detecting method of mobile terminal and device thereof - Google Patents
Battery remaining capacity detecting method of mobile terminal and device thereof Download PDFInfo
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- CN105372602A CN105372602A CN201510910518.3A CN201510910518A CN105372602A CN 105372602 A CN105372602 A CN 105372602A CN 201510910518 A CN201510910518 A CN 201510910518A CN 105372602 A CN105372602 A CN 105372602A
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Abstract
The invention discloses a battery remaining capacity detecting method of a mobile terminal and a device thereof. The battery remaining capacity detecting method includes the following steps that: A, the open-circuit voltage of a battery is calculated according to the temperature of the battery, the value of the internal resistance of the battery and the current of the battery at present; and B, a preset temperature, voltage and capacity relationship matrix is queried according to the temperature of the battery and the open-circuit voltage, so that a corresponding battery remaining capacity percentage can be obtained. With the battery remaining capacity detecting method of the mobile terminal and the device thereof of the invention adopted, the battery remaining capacity percentage can be still obtained without a coulombmeter; cost can be decreased; space can be saved for a circuit board; and the problems of high cost and space occupation of the circuit board of an existing mobile terminal which are caused by a situation that the existing mobile terminal can accurately display battery remaining capacity percentages assuredly only with an expensive coulombmeter required can be solved.
Description
Technical field
The present invention relates to technical field of mobile terminals, in particular a kind of battery dump energy detection method of mobile terminal and device thereof.
Background technology
At present, mobile terminal all has electric quantity display function to point out the dump energy number percent of user's battery.In the prior art, battery electric quantity is all accurately calculate electricity (electricity consumed) by circuit by coulombmeter (or also known as voltameter) according to the amount of substance that electrode reacts, the difference then total for battery electricity being deducted the electricity consumed again divided by the total electricity of battery, dump energy number percent can be obtained; Although said method result of calculation is accurate, coulombmeter is expensive, and takies the space of mobile terminal circuit plate.
Thus prior art need to improve.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of battery dump energy detection method and device thereof of mobile terminal, use coulombmeter calculating dump energy cost higher and the problem taking circuit board space to solve existing mobile terminal.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A battery dump energy detection method for mobile terminal, it comprises:
A, resistance, cell voltage and battery current according to current battery temperature, the internal resistance of cell calculate the open-circuit voltage of battery;
B, the temperature voltage capacity relationship matrix preset according to described battery temperature and open-circuit voltage, inquiry obtain corresponding battery remaining power number percent.
In described battery dump energy detection method, described steps A specifically comprises:
The temperature voltage of A1, acquisition battery calculates the resistance of battery thermistor, and the temperature temperature-sensitive relational matrix that inquiry is preset obtains current battery temperature;
A2, the temperature internal resistance relational matrix default according to battery temperature inquiry obtain the resistance of the internal resistance of cell;
A3, obtain current cell voltage and battery current, in conjunction with the open-circuit voltage of the computing the resistor value battery of the internal resistance of cell.
In described battery dump energy detection method, in described steps A 1, described temperature temperature-sensitive relational matrix is the value relatable matrix of battery thermistor corresponding under each battery temperature; The resistance of battery thermistor Rt, computing formula is as follows:
Rt=Vt*Rt1/ (VCC-Vt), wherein, Vt is the temperature voltage on battery temperature pin BT, and R1 is the resistance of the external divider resistance of battery temperature pin, and VCC is the magnitude of voltage of the voltage end that divider resistance connects.
In described battery dump energy detection method, in described steps A 2, described temperature internal resistance relational matrix is the resistance of the internal resistance of cell corresponding at each temperature.
In described battery dump energy detection method, in described steps A 3, the formula of open-circuit voltage is: V0=R1*I1+V1, and wherein, R1 is the resistance of the internal resistance of cell obtained, and V1 is current cell voltage, and I1 is battery current.
In described battery dump energy detection method, in described step B, temperature voltage capacity relationship matrix is the value of battery remaining power number percent corresponding under each temperature, open-circuit voltage.
A battery dump energy calculation element for mobile terminal, it comprises:
Computing module, calculates the open-circuit voltage of battery according to the resistance of current battery temperature, the internal resistance of cell, cell voltage and battery current;
Electricity acquisition module, obtains corresponding battery remaining power number percent according to the temperature voltage capacity relationship matrix that described battery temperature and open-circuit voltage, inquiry are preset;
Storer, stores the temperature voltage capacity relationship matrix preset.
In the battery dump energy calculation element of described mobile terminal, described computing module comprises:
Temperature acquiring unit, the temperature voltage obtaining battery calculates the resistance of battery thermistor, and the temperature temperature-sensitive relational matrix preset in consults memory obtains current battery temperature.
Internal resistance acquiring unit, obtains the resistance of the internal resistance of cell according to the temperature internal resistance relational matrix preset in battery temperature consults memory;
Electric current acquiring unit, obtains current battery current size;
Voltage ADC unit, obtains the cell voltage on present battery positive pole;
Open circuit computing unit, according to current cell voltage and battery current, in conjunction with the open-circuit voltage of the computing the resistor value battery of the internal resistance of cell;
Described storer is storing temperature temperature-sensitive relational matrix and temperature internal resistance relational matrix also.
Compared to prior art, the battery dump energy detection method of mobile terminal provided by the invention and device thereof, calculate the open-circuit voltage of battery according to the resistance of current battery temperature, the internal resistance of cell, cell voltage and battery current; Corresponding battery remaining power number percent is obtained according to the temperature voltage capacity relationship matrix that described battery temperature and open-circuit voltage, inquiry are preset; Thus achieve and also can not obtain battery dump energy number percent when there is no coulombmeter, which reduce cost, also save the space of circuit board; Solve existing mobile terminal all to need to use coulombmeter guarantee to show battery dump energy number percent more accurately, and the expensive cost that causes of coulombmeter is higher, and takies the problem in the space of mobile terminal circuit plate.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the battery equivalent electrical circuit of existing mobile terminal.
Fig. 2 is the battery dump energy detection method process flow diagram of mobile terminal provided by the invention.
Fig. 3 is the circuit diagram calculating battery thermistor in battery dump energy detection method provided by the invention.
Fig. 4 is the circuit diagram obtaining temperature temperature-sensitive relational matrix in battery dump energy detection method provided by the invention.
Fig. 5 is the circuit diagram obtaining temperature internal resistance relational matrix in battery dump energy detection method provided by the invention.
Fig. 6 is the schematic diagram of the battery dump energy pick-up unit Application Example of mobile terminal provided by the invention.
Embodiment
The invention provides a kind of battery dump energy detection method and device thereof of mobile terminal.For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, it is the schematic diagram of the battery equivalent electrical circuit of existing mobile terminal, and in Fig. 1, R1 is the internal resistance of cell, and V0 is the open-circuit voltage of battery, and V1 is the voltage on anode, and Rt is battery thermistor and is connected between battery temperature pin BT and negative pole B-.When what load battery do not take over, positive pole B+ and the negative pole B-of battery open a way, and now on internal resistance of cell R1, electric current I1 is 0, therefore V1=V0.When battery to connect after load (as battery to connect with Mobile terminal main board power for mobile terminal time), internal resistance of cell R1 there is electric current I 1 flow through, see (I1 direction upwards) in Fig. 1, now V1=V0-I1*R1, I1 is just upon discharging, therefore V0>V1, I1 is negative when charging, therefore V0<V1.
In order to realize calculating battery dump energy number percent under without the condition of coulombmeter, the present embodiment by calculate battery open-circuit voltage V0, obtain in conjunction with current battery temperature.As shown in Figure 2, then the battery dump energy detection method of mobile terminal provided by the invention comprises:
S100, resistance, cell voltage and battery current according to current battery temperature, the internal resistance of cell calculate the open-circuit voltage of battery;
S200, the temperature voltage capacity relationship matrix preset according to described battery temperature and open-circuit voltage, inquiry obtain corresponding battery remaining power number percent.
Wherein, described step S100 specifically comprises:
The temperature voltage of step 110, acquisition battery calculates the resistance of battery thermistor, and the temperature temperature-sensitive relational matrix that inquiry is preset obtains current battery temperature;
Step 120, the temperature internal resistance relational matrix default according to battery temperature inquiry obtain the resistance of the internal resistance of cell;
Step 130, obtain current cell voltage and battery current, in conjunction with the open-circuit voltage of the computing the resistor value battery of the internal resistance of cell;
In described step S110, described temperature temperature-sensitive relational matrix is the value relatable matrix of battery thermistor corresponding under each battery temperature, as follows:
-80 degrees Celsius, Rt (-80);
-79 degrees Celsius, Rt (-79);
-78 degrees Celsius, Rt (-78);
……
78 degrees Celsius, Rt (78);
79 degrees Celsius, Rt (79);
80 degrees Celsius, Rt (80).
Higher than 80 degree, or can not spend, so only list above-mentioned value to carry out example lower than-80 based on battery temperature in practical service environment.In said temperature temperature-sensitive relational matrix, first is classified as battery temperature x, and the second resistance being classified as battery thermistor, is expressed as Rt (x).The resistance that only need obtain battery thermistor just can obtain corresponding battery temperature.
The computing method of battery thermistor Rt as described in Figure 3, battery temperature pin is connected to the mainboard of mobile terminal, namely battery temperature pin BT is arranged on mainboard by the divider resistance Rt1(that a resistance is fixing) connect voltage end VCC, obtain the temperature voltage Vt on battery temperature pin BT, can calculate the resistance of battery thermistor Rt, computing formula is as follows:
Rt=Vt*Rt1/ (VCC-Vt), wherein, Vt is the temperature voltage on battery temperature pin BT, and Rt1 is the resistance of the external resistance of battery temperature pin, and VCC is the magnitude of voltage of voltage end.
In temperature temperature-sensitive relational matrix, identify the immediate resistance of resistance with calculated battery thermistor Rt, the temperature in the first row that close resistance is corresponding is as battery temperature.In the present embodiment, described temperature temperature-sensitive relational matrix can adopt following method to obtain:
Battery is as shown in Figure 4 external, be 10K Ω by battery temperature pin BT by resistance Rt1(resistance) connect voltage end VCC(5V), the negative pole B-of battery temperature pin BT and battery is connected to voltage table; Put into constant temperature oven in the lump afterwards.Set temperature is x, the voltage observed on battery temperature pin BT by voltage table is constant in Preset Time (as 30 seconds), then illustrate that now battery thermistor Rt has been stabilized in this temperature, the resistance of thermistor is calculated with the voltage (i.e. the magnitude of voltage of voltage table display in Fig. 4) on now battery temperature pin BT, computing formula is as above identical, i.e. Rt=Vt*Rt1/ (VCC-Vt).When establishing different temperature to constant temperature oven, the resistance Rt (x) of battery thermistor corresponding under can obtaining this temperature, records and can obtain temperature temperature-sensitive relational matrix.
Based on internal resistance of cell R1 be the many materials of inside battery or device (as electric capacity, resistance etc.) equivalence come, therefore can along with battery temperature change and change.In described step S120, the resistance of the internal resistance of cell R1 that described default temperature internal resistance relational matrix is corresponding under including each temperature, as follows:
-80 degrees Celsius, R1 (-80);
-79 degrees Celsius, R1 (-79);
-78 degrees Celsius, R1 (-78);
……
78 degrees Celsius, R1 (78);
79 degrees Celsius, R1 (79);
80 degrees Celsius, R1 (80);
Higher than 80 degree, or can not spend, so only list above-mentioned value to carry out example lower than-80 based on battery temperature in practical service environment.Said temperature internal resistance relational matrix, first is classified as battery temperature x, and the second resistance being classified as internal resistance of cell R1, is expressed as R1 (x).Therefore, according to after the battery temperature that step S110 obtains, directly inquiry temperature internal resistance relational matrix can obtain the resistance of present battery internal resistance R1.
Described temperature internal resistance relational matrix can be obtained by following method:
Battery is as shown in Figure 5 external, by one end of the positive pole B+ connecting valve S of battery and voltage table, the other end of switch S connects reometer, and load R2(such as resistance is fixed as the resistance of 100k Ω) one end connect reometer, the other end of load R2 connects the negative pole B-of voltage table and battery; Put into constant temperature oven in the lump afterwards.Set temperature is x; First cut-off switch S, read the registration of voltage table, now the registration of voltage table is open-circuit voltage V0; Switch S closed, read the voltage on the positive pole B+ of battery, the registration of voltage table, reometer can calculate the resistance of internal resistance of cell R1 after stablizing by the time, and computing formula is as follows:
R1=(V0-V1)/I1, wherein, I1 is the registration of reometer, voltage when V0 is switch S disconnection on anode B+ and the open-circuit voltage of battery, and V1 is the voltage that switch S closes on rear positive pole B+; When establishing different temperature to constant temperature oven, the resistance of the internal resistance of cell R1 under corresponding temperature can be obtained, record and can obtain temperature internal resistance relational matrix.
In described step S130, the formula according to the open-circuit voltage of the computing the resistor value battery of internal resistance of cell R1 is: V0=R1*I1+V1, and wherein, R1 is the resistance of the internal resistance of cell obtained in step S200.V1 is the cell voltage on anode B+, and as shown in Figure 6, the voltage ADC module connected by anode B+ obtains.I1 is the battery current that positive pole B+ exports, and the electric current acquisition module connected by anode B+ obtains.Thus the open-circuit voltage V0 of battery can be obtained according to formula V0=R1*I1+V1.
In described step S200, based on one piece of fixing battery, under same battery temperature, the open-circuit voltage one_to_one corresponding of its battery dump energy number percent and this battery; In other words, as long as know that the open-circuit voltage of current battery temperature, battery just can determine present battery residual capacity number percent.Such as, if a battery, battery temperature is 25 degree, and battery remaining power corresponding when open-circuit voltage is 3.8V is 50%.Then in the use procedure of mobile terminal, if the open-circuit voltage calculating battery be 3.8V and battery temperature be 25 degree, can to obtain battery remaining power be 50%.For this reason, the present embodiment obtains battery temperature by step S100, calculates the open-circuit voltage of battery, in described step S200 directly the temperature voltage capacity relationship matrix preset of inquiry corresponding battery remaining power number percent.
In the present embodiment, list at each temperature in described temperature voltage capacity relationship matrix, the corresponding relation of open-circuit voltage and battery remaining power number percent, as follows:
-80 degrees Celsius, 3.20V, S (3.20 ,-80);
-80 degrees Celsius, 3.21V, S (3.21 ,-80);
……
-80 degrees Celsius, 4.19V, S (4.19 ,-80);
-80 degrees Celsius, 4.20V, S (4.20 ,-80);
-79 degrees Celsius, 3.20V, S (3.20 ,-79);
-79 degrees Celsius, 3.21V, S (3.21 ,-79);
……
-79 degrees Celsius, 4.19V, S (4.19 ,-79);
-79 degrees Celsius, 4.20V, S (4.20 ,-79);
……
79 degrees Celsius, 3.20V, S (3.20,79);
79 degrees Celsius, 3.21V, S (3.21,79);
……
79 degrees Celsius, 4.19V, S (4.19,79);
79 degrees Celsius, 4.20V, S (4.20,79);
80 degrees Celsius, 3.20V, S (3.20,80);
80 degrees Celsius, 3.21V, S (3.21,80);
……
80 degrees Celsius, 4.19V, S (4.19,80);
80 degrees Celsius, 4.20V, S (4.20,80);
In above-mentioned example, know current battery temperature x, the open-circuit voltage y of battery, just can obtain current battery remaining power number percent s(x, y).Higher than 80 degree, or can not spend lower than-80 based on battery temperature in practical service environment, so the temperature range of-80 degree ~ 80 degree only need be listed.The open-circuit voltage of battery is full of electric voltage (being 4.20V in example) when reality uses according to battery and shutdown voltage (being 3.20V in example) determines scope.
Described temperature voltage capacity relationship matrix obtains by following method, with S (4.00,25) for example.Battery is put into 25 degree of constant temperature ovens, first battery is full of that (charging current does not change within a period of time, thinks and is full of, now voltage is generally 4.20V), then discharge with fixed current (as 500mA), until battery is put to 3.2V(be open-circuit voltage, voltage when namely wanting battery not connect load on anode is 3.2V), meter record whole discharge time is TTA.Again battery is charged to the open-circuit voltage in 4.00V(and S, be 4.00V herein, voltage when namely wanting battery not connect load on anode is 4.00V, this is preferred values, also other magnitudes of voltage of 3.2V can be greater than for being less than 4.2V), then battery is discharged with fixed current (as 500mA), until be open-circuit voltage by battery discharge to 3.2V(, voltage when namely wanting battery not connect load on anode is 3.2V), recording whole discharge time is TTA1, then S (4.00,25)=TTA1/TTA.
Based on the battery dump energy detection method of above-mentioned mobile terminal, the present invention also provides a kind of battery dump energy calculation element of mobile terminal, sees also Fig. 6, and battery dump energy calculation element is arranged on the mainboard of mobile terminal, and it comprises:
Storer 100, for storing temperature voltage capacity relational matrix (the battery dump energy number percent that at each temperature, each open-circuit voltage is corresponding);
Computing module 200, calculates the open-circuit voltage of battery according to the resistance of current battery temperature, the internal resistance of cell, cell voltage and battery current;
Electricity acquisition module 300, obtains corresponding battery remaining power number percent for the temperature voltage capacity relationship matrix preset according to described battery temperature and open-circuit voltage, inquiry.
Wherein, described computing module 200 comprises:
Temperature acquiring unit 210, connects battery temperature pin and storer, and the temperature voltage for obtaining battery calculates the resistance of battery thermistor, and the temperature temperature-sensitive relational matrix preset in consults memory obtains current battery temperature.Described divider resistance Rt1 is arranged in temperature acquiring unit 210.
Internal resistance acquiring unit 220, obtains the resistance of the internal resistance of cell according to the temperature internal resistance relational matrix preset in battery temperature consults memory;
Electric current acquiring unit 230, for obtaining current battery current size;
Voltage ADC unit 240, for obtaining the cell voltage on present battery positive pole;
Open circuit computing unit 250, for according to current cell voltage and battery current, in conjunction with the open-circuit voltage of the computing the resistor value battery of the internal resistance of cell;
Described storer 100 also for storing temperature temperature-sensitive relational matrix (under each battery temperature corresponding battery thermistor), temperature internal resistance relational matrix (resistance of the internal resistance of cell corresponding at each temperature) and.
In sum, the battery dump energy detection method of mobile terminal of the present invention and device thereof, by obtaining the open-circuit voltage of battery according to current battery temperature, the internal resistance of cell and current battery current, inquire about the temperature voltage capacity relationship matrix preset, the battery remaining power number percent that can obtain correspondence according to current battery temperature and open-circuit voltage.Thus achieve and also can not obtain battery dump energy number percent when there is no coulombmeter, which reduce cost, also save the space of circuit board; Solve existing mobile terminal all to need to use coulombmeter guarantee to show battery dump energy number percent more accurately, and the expensive cost that causes of coulombmeter is higher, and takies the problem in the space of mobile terminal circuit plate; Also solve more existing low costs or the compacter problem that cannot use the mobile terminal of coulombmeter, accurately cannot point out user's battery dump energy number percent of circuit board fabric swatch.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (9)
1. a battery dump energy detection method for mobile terminal, is characterized in that, comprising:
A, resistance, cell voltage and battery current according to current battery temperature, the internal resistance of cell calculate the open-circuit voltage of battery;
B, the temperature voltage capacity relationship matrix preset according to described battery temperature and open-circuit voltage, inquiry obtain corresponding battery remaining power number percent.
2. battery dump energy detection method according to claim 1, is characterized in that, described steps A specifically comprises:
The temperature voltage of A1, acquisition battery calculates the resistance of battery thermistor, and the temperature temperature-sensitive relational matrix that inquiry is preset obtains current battery temperature;
A2, the temperature internal resistance relational matrix default according to battery temperature inquiry obtain the resistance of the internal resistance of cell;
A3, obtain current cell voltage and battery current, in conjunction with the open-circuit voltage of the computing the resistor value battery of the internal resistance of cell.
3. battery dump energy detection method according to claim 2, is characterized in that, in described steps A 1, described temperature temperature-sensitive relational matrix is the value relatable matrix of battery thermistor corresponding under each battery temperature; The resistance of battery thermistor Rt, computing formula is as follows:
Rt=Vt*Rt1/ (VCC-Vt), wherein, Vt is the temperature voltage on battery temperature pin BT, and R1 is the resistance of the external divider resistance of battery temperature pin, and VCC is the magnitude of voltage of the voltage end that divider resistance connects.
4. battery dump energy detection method according to claim 2, is characterized in that, in described steps A 2, described temperature internal resistance relational matrix is the resistance of the internal resistance of cell corresponding at each temperature.
5. battery dump energy detection method according to claim 2, is characterized in that, in described steps A 3, the formula of open-circuit voltage is: V0=R1*I1+V1, and wherein, R1 is the resistance of the internal resistance of cell obtained, V1 is current cell voltage, and I1 is battery current.
6. battery dump energy detection method according to claim 1, is characterized in that, in described step B, temperature voltage capacity relationship matrix is the value of battery remaining power number percent corresponding under each temperature, open-circuit voltage.
7. a battery dump energy calculation element for mobile terminal, is characterized in that, comprising:
Computing module, calculates the open-circuit voltage of battery according to the resistance of current battery temperature, the internal resistance of cell, cell voltage and battery current;
Electricity acquisition module, obtains corresponding battery remaining power number percent according to the temperature voltage capacity relationship matrix that described battery temperature and open-circuit voltage, inquiry are preset;
Storer, stores the temperature voltage capacity relationship matrix preset.
8. the battery dump energy calculation element of mobile terminal according to claim 7, is characterized in that, described computing module comprises:
Temperature acquiring unit, the temperature voltage obtaining battery calculates the resistance of battery thermistor, and the temperature temperature-sensitive relational matrix preset in consults memory obtains current battery temperature.
9. internal resistance acquiring unit, obtains the resistance of the internal resistance of cell according to the temperature internal resistance relational matrix preset in battery temperature consults memory;
Electric current acquiring unit, obtains current battery current size;
Voltage ADC unit, obtains the cell voltage on present battery positive pole;
Open circuit computing unit, according to current cell voltage and battery current, in conjunction with the open-circuit voltage of the computing the resistor value battery of the internal resistance of cell;
Described storer is storing temperature temperature-sensitive relational matrix and temperature internal resistance relational matrix also.
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| CN107167738B (en) * | 2017-04-21 | 2019-08-20 | 华南理工大学 | A kind of modification method and device of the power battery SOC estimation based on OCV-SOC curvilinear characteristic |
| CN111323718A (en) * | 2020-04-02 | 2020-06-23 | 烟台艾睿光电科技有限公司 | Method and device for detecting residual electric quantity of battery, electronic equipment and storage medium |
| CN111323718B (en) * | 2020-04-02 | 2022-04-05 | 烟台艾睿光电科技有限公司 | Method and device for detecting residual electric quantity of battery, electronic equipment and storage medium |
| CN111772248A (en) * | 2020-06-18 | 2020-10-16 | 深圳市吉迩科技有限公司 | Electric quantity display method, device and system of electronic cigarette |
| CN113759257A (en) * | 2020-07-17 | 2021-12-07 | 北京京东尚科信息技术有限公司 | Current compensation circuit and method for electronic equipment and electronic equipment |
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Application publication date: 20160302 |