CN101976306B - Method for calculating discharge time of capacitor, and mobile terminal - Google Patents
Method for calculating discharge time of capacitor, and mobile terminal Download PDFInfo
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- CN101976306B CN101976306B CN201010529067.6A CN201010529067A CN101976306B CN 101976306 B CN101976306 B CN 101976306B CN 201010529067 A CN201010529067 A CN 201010529067A CN 101976306 B CN101976306 B CN 101976306B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910052715 tantalum Inorganic materials 0.000 claims description 9
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
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Abstract
The invention belongs to the technical field of capacitors, and discloses a method for calculating the discharge time of a capacitor, and a mobile terminal. The method comprises the following steps that: a capacitor chip acquires a voltage U1 before the capacitor discharges; the capacitor chip acquires a voltage U2 after the capacitor discharges; the capacitor chip calculates discharge capacity according to the voltage U1 before the capacitor discharges and the voltage U2 after the capacitor discharges, wherein the discharge capacity is calculated according to formulas: Q=C*(U1-U2) and discharge capacity=Q*1/3.6milliampere*hour; and the capacitor chip calculates the discharge time of the capacitor according to a clock electrically connected with the capacitor chip, wherein the discharge time of the capacitor is calculated according to a formula: T=discharge capacity/consumed current. By the method, when the voltages on the two sides of the capacitor change, the capacity of the capacitor can be accurately calculated and the time is calculated according to the capacity of the capacitor, so that the application of the capacitor is expanded.
Description
Technical field
The invention belongs to technical field of mobile terminals, be specifically related to a kind of for calculable capacitor method and the mobile terminal of discharge time
Background technology
Along with the development of mobile terminal technology, user is also more and more higher to the requirement of mobile terminal function.
Capacitor is more in the application of mobile terminal or data card, and so-called capacitor holds and discharge the electronic devices and components of electric charge exactly.The basic functional principle of capacitor is exactly charging and discharging, certainly also has rectification, vibration and other effect.The structure of capacitor is very simple in addition, is mainly made up of two positive and negative electrodes and the insulating medium being clipped in the middle, so capacitor type is mainly determined by electrode and insulating medium.In the circuit of the mainboard of computer system, plug-in card, power supply, apply a few class capacitors such as electrolytic condenser, paper dielectric capacitor and magnetic dielectric container, and taking electrolytic condenser as main.
First need there is individual charging process because set up voltage on capacitor, along with charging process, the voltage on capacitor progressively improves, and will first have like this electric current, the rear process of setting up voltage.In prior art, when condenser voltage not being changed, by the calculating to condenser capacity, cause the application of capacitor to be restricted.
In the time that the voltage on capacitor both sides changes, how accurately calculable capacitor capacity, according to condenser capacity computing time, be one of direction of capacitor technology area research.
Summary of the invention
The object of the present invention is to provide a kind of for the calculable capacitor method of discharge time, when the voltage that is intended to capacitor both sides changes, the discharge capacity of calculable capacitor accurately, and according to the time of the discharge capacity calculable capacitor electric discharge of capacitor.
The embodiment of the present invention is achieved in that a kind of for the calculable capacitor method of discharge time, and described capacitor and capacitor chip are electrically connected, and wherein, said method comprising the steps of:
Obtain the voltage U 1 before capacitor discharge by described capacitor chip;
Obtain the voltage U 2 after described capacitor discharge by described capacitor chip
Described capacitor chip calculates and obtains discharge capacity according to the voltage U 2 after voltage U 1 and capacitor discharge before capacitor discharge, wherein, in the time that discharge capacity is obtained in calculating, obtains by following formula:
Q=C × (U1-U2), discharge capacity=Q × 1/3.6 milliampere × time, wherein, and the capacitance that C is described capacitor, Q is electric weight;
Described capacitor chip carrys out calculable capacitor discharge time according to the clock being electrically connected with this capacitor chip, wherein, in the time of the discharge time of calculable capacitor, obtains by following formula:
T=discharge capacity/power consumption electric current;
Be the discharge time=Q × 1/3.6 milliampere × time/I of capacitor, wherein, power consumption electric current when I is capacitor discharge; Described capacitor is arranged in mobile terminal, and connects clock and the battery of mobile terminal;
Described capacitor connection data card, described capacitor is the tantalum capacitor that in data card, capacity is 2200uF; Under the state that is 2000mA at discharge current, discharge into 3.3V from 4V and meet data card power supply needs; Its account form is:
2200uF capacitor discharges into discharge capacity=0.002200 × (4-3.3) × 1/3.6=0.0004278mAh of 3.3V from 4V;
The discharge current 2000mA 0.0004278/2000=0.0000002139 hour=0.00077004 second=770.004uS > 577uS that can discharge, meeting data card peak point current is the burst power requirement of 2000mA.
Another object of the embodiment of the present invention is to provide a kind of mobile terminal, wherein, comprises the capacitor chip being installed in mobile terminal;
Described capacitor chip, for obtaining the voltage U 2 after voltage U 1 and the electric discharge before capacitor discharge; And calculate and obtain discharge capacity according to the voltage U 2 after voltage U 1 and capacitor discharge before capacitor discharge, wherein, in the time that discharge capacity is obtained in calculating, obtain by following formula:
Q=C × (U1-U2), discharge capacity=Q × 1/3.6 milliampere × time, wherein, and the capacitance that C is described capacitor, Q is electric weight;
Described capacitor chip, also the discharge time for calculating described capacitor according to the clock being connected with this capacitor, wherein, in the discharge time of calculable capacitor, obtains in the following manner:
T=discharge capacity/power consumption electric current;
Be the discharge time=Q × 1/3.6 milliampere × time/I of capacitor, wherein, power consumption electric current when I is capacitor discharge; Described capacitor connects respectively clock and the battery of mobile terminal;
Described capacitor connection data card, described capacitor is the tantalum capacitor that in data card, capacity is 2200uF; Under the state that is 2000mA at discharge current, discharge into 3.3V from 4V and meet data card power supply needs; Its account form is:
2200uF capacitor discharges into discharge capacity=0.002200 × (4-3.3) × 1/3.6=0.0004278mAh of 3.3V from 4V;
The discharge current 2000mA 0.0004278/2000=0.0000002139 hour=0.00077004 second=770.004uS > 577uS that can discharge, meeting data card peak point current is the burst power requirement of 2000mA.
In the embodiment of the present invention, described capacitor chip obtains the voltage U 2 after voltage U 1 and the capacitor discharge before capacitor discharge, and obtain discharge capacity, wherein, in the time that discharge capacity is obtained in calculating, obtain by following formula: Q=C × (U1-U2), discharge capacity=Q × 1/3.6 milliampere × time, wherein, C is the capacitance of described capacitor, Q is electric weight, the embodiment of the present invention is in the time that the voltage on capacitor both sides changes, the discharge capacity of calculable capacitor accurately, and according to the discharge time of the discharge capacity calculable capacitor of capacitor, expand the application of capacitor.
Brief description of the drawings
The process flow diagram of the method for calculable capacitor discharge time that Fig. 1 provides for the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The flow process of the method for calculable capacitor discharge time that Fig. 1 shows that the embodiment of the present invention provides.
In step S101, obtain the voltage U 1 before capacitor discharge by capacitor chip;
In step S102, obtain the voltage U 2 after described capacitor discharge by capacitor chip;
In step S103, capacitor chip calculates and obtains discharge capacity according to the voltage U 2 after voltage U 1 and capacitor discharge before capacitor discharge;
In step S104, capacitor chip maintains the time of (i.e. electric discharge) according to capacitor described in the clock calculation being connected with this capacitor.
Wherein, in step S103, in the time that discharge capacity is obtained in calculating, obtain by following formula:
Q=C × (U1-U2), discharge capacity=Q × 1/3.6 milliampere × time, wherein, and the capacitance that C is described capacitor, Q is electric weight.
Wherein, in the time of the time of calculable capacitor electric discharge, obtain in the following manner: T=discharge capacity/power consumption electric current.
Be the discharge time=Q × 1/3.6 milliampere × time/I of capacitor, wherein, power consumption electric current when I is capacitor discharge.
Wherein, the unit coulomb (C) of electric weight Q, it is defined as: when flowing through electric current 1 ampere-hour of certain curved surface, the electric weight passing through p.s. is defined as 1 coulomb, i.e. 1 coulomb of (C)=1 ampere × second (A × S), i.e. Q=I × t.And 1 coulomb=1 ampere × second=1000mA × second=1000mA1/3600 hour=1/3.6mA × h, 1 coulomb electric charge be equivalent to 1/3.6 milliampere × time.
Capacitance C farad (the F)=Q/U of capacitor, i.e. Q=C × U, capacitance C is the steady state value that represents capacitor specific characteristics, the electric weight Q of visible capacitor is directly proportional to the voltage U at capacitor two ends.
Wherein, the conversion of static capacity F and discharge capacity mAh: capacitor capacitance is C, in the time that its both end voltage discharges into U2 from U1, its discharge capacity Q=C × (U1-U2), discharge capacity=Q × 1/3.6 of equivalence milliampere × time.
With two concrete examples, the present invention is described below:
1, backup battery Time Calculation: the button capacitor that is 0.07F by static capacity, while discharging into 2V use from 3V, discharge capacity=0.07 × 1/3.6=0.0194mAh.Be 10uA as cell phone clock maintains power consumption, i.e. 0.01mA, 0.0194/0.01=1.94h, the button capacitor of 0.07F maintains and on the mobile phone that power consumption is 10uA, discharges into 2V from 3V and can maintain 1.94 hours at cell phone clock.
2: large capacity energy storage tantalum capacitor power supply design in data card: can meet power requirement in the burst power applications that in data card, the tantalum capacitor of 2200uF is 2000mA at data card peak point current?
As long as can meet power requirement the burst power applications that the tantalum capacitor that the time > 577us that discharges into 3.3V from 4V under the state that checking 2200uF tantalum capacitor is 2000mA at discharge current is provable 2200uF is 2000mA at data card peak point current.
2200uF capacitor discharges into discharge capacity=0.002200 × (4-3.3) × 1/3.6=0.0004278mAh of 3.3V from 4V, the discharge current 2000mA 0.0004278/2000=0.0000002139 hour=0.00077004 second=770.004uS > 577uS that can discharge, can meet data card power supply needs so discharge into 3.3V from 4V under the state that 2200uF tantalum capacitor is 2000mA at discharge current.
In specific implementation process, described capacitor is arranged in mobile terminal, and connects clock and the battery of mobile terminal.
In specific implementation process, described capacitor connection data card.
The embodiment of the present invention also provides a kind of capacitor chip, described capacitor chip, for obtaining the voltage U 2 after voltage U 1 and the electric discharge before capacitor discharge, and calculate and obtain discharge capacity according to the voltage U 2 after voltage U 1 and capacitor discharge before capacitor discharge, wherein, in the time that discharge capacity is obtained in calculating, obtain by following formula:
Q=C × (U1-U2), discharge capacity=Q × 1/3.6 milliampere × time, wherein, and the capacitance that C is described capacitor, Q is electric weight.
Described capacitor chip, also for according to the discharge time of capacitor described in the clock calculation being connected with this capacitor.
Preferably, described capacitor is arranged in mobile terminal, and connects clock and the battery of mobile terminal.
Preferably, described capacitor connection data card.
The embodiment of the present invention also provides a kind of mobile terminal, is provided with the capacitor chip that the embodiment of the present invention provides in described mobile terminal, in view of this capacitor chip is described later in detail above, repeats no more herein.
In the embodiment of the present invention, described capacitor chip obtains the voltage U 2 after voltage U 1 and the capacitor discharge before capacitor discharge, and obtain discharge capacity, wherein, in the time that discharge capacity is obtained in calculating, obtain by following formula: Q=C × (U1-U2), discharge capacity=Q × 1/3.6 milliampere × time, wherein, the capacitance that C is described capacitor, Q is electric weight, the embodiment of the present invention is in the time that the voltage on capacitor both sides changes, calculable capacitor capacity accurately, and according to condenser capacity computing time, the application of having expanded capacitor.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (1)
1. for the calculable capacitor method of discharge time, described capacitor and capacitor chip are electrically connected, and it is characterized in that, said method comprising the steps of:
Obtain the voltage U 1 before capacitor discharge by described capacitor chip;
Obtain the voltage U 2 after described capacitor discharge by described capacitor chip
Described capacitor chip calculates and obtains discharge capacity according to the voltage U 2 after voltage U 1 and capacitor discharge before capacitor discharge, wherein, in the time that discharge capacity is obtained in calculating, obtains by following formula:
Q=C × (U1-U2), discharge capacity=Q × 1/3.6 milliampere × time, wherein, and the capacitance that C is described capacitor, Q is electric weight;
Described capacitor chip carrys out calculable capacitor discharge time according to the clock being electrically connected with this capacitor chip, wherein, in the time of the discharge time of calculable capacitor, obtains by following formula:
T=discharge capacity/power consumption electric current;
Be the discharge time=Q × 1/3.6 milliampere × time/I of capacitor, wherein, power consumption electric current when I is capacitor discharge;
Described capacitor is the tantalum capacitor that in data card, capacity is 2200uF; Under the state that is 2000mA at discharge current, discharge into 3.3V from 4V and meet data card power supply needs; Its account form is:
2200uF capacitor discharges into discharge capacity=0.002200 × (4-3.3) × 1/3.6=0.0004278mAh of 3.3V from 4V;
The discharge current 2000mA 0.0004278/2000=0.0000002139 hour=0.00077004 second=770.004uS > 577uS that can discharge, meeting data card peak point current is the burst power requirement of 2000mA.
2, a mobile terminal, is characterized in that, comprises the capacitor chip being installed in mobile terminal;
Described capacitor chip, for obtaining the voltage U 2 after voltage U 1 and the electric discharge before capacitor discharge; And calculate and obtain discharge capacity according to the voltage U 2 after voltage U 1 and capacitor discharge before capacitor discharge, wherein, in the time that discharge capacity is obtained in calculating, obtain by following formula:
Q=C × (U1-U2), discharge capacity=Q × 1/3.6 milliampere × time, wherein, and the capacitance that C is described capacitor, Q is electric weight;
Described capacitor chip, the also discharge time for calculating described capacitor according to the clock being connected with this capacitor, wherein, while electric discharge, obtains in the time of calculable capacitor in the following manner:
T=discharge capacity/power consumption electric current;
Be the discharge time=Q × 1/3.6 milliampere × time/I of capacitor, wherein, power consumption electric current when I is capacitor discharge;
Described capacitor is the tantalum capacitor that in data card, capacity is 2200uF; Under the state that is 2000mA at discharge current, discharge into 3.3V from 4V and meet data card power supply needs; Its account form is:
2200uF capacitor discharges into discharge capacity=0.002200 × (4-3.3) × 1/3.6=0.0004278mAh of 3.3V from 4V;
The discharge current 2000mA 0.0004278/2000=0.0000002139 hour=0.00077004 second=770.004uS > 577uS that can discharge, meeting data card peak point current is the burst power requirement of 2000mA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010529067.6A CN101976306B (en) | 2010-10-28 | 2010-10-28 | Method for calculating discharge time of capacitor, and mobile terminal |
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| CN201010529067.6A CN101976306B (en) | 2010-10-28 | 2010-10-28 | Method for calculating discharge time of capacitor, and mobile terminal |
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| CN101976306A CN101976306A (en) | 2011-02-16 |
| CN101976306B true CN101976306B (en) | 2014-06-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369713A (en) * | 2001-02-07 | 2002-09-18 | 弗兰克公司 | Capacitor measrement |
| US6683462B2 (en) * | 2000-11-30 | 2004-01-27 | Agilent Technologies, Inc. | Apparatus for and method of measuring capacitance with high accuracy |
| CN101788609A (en) * | 2010-02-09 | 2010-07-28 | 华为终端有限公司 | Resistance value measuring method and device or capacitance value measuring method and device |
| CN101799496A (en) * | 2010-03-09 | 2010-08-11 | 臧佳菁 | Capacitor measurement device and method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6683462B2 (en) * | 2000-11-30 | 2004-01-27 | Agilent Technologies, Inc. | Apparatus for and method of measuring capacitance with high accuracy |
| CN1369713A (en) * | 2001-02-07 | 2002-09-18 | 弗兰克公司 | Capacitor measrement |
| CN101788609A (en) * | 2010-02-09 | 2010-07-28 | 华为终端有限公司 | Resistance value measuring method and device or capacitance value measuring method and device |
| CN101799496A (en) * | 2010-03-09 | 2010-08-11 | 臧佳菁 | Capacitor measurement device and method thereof |
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Granted publication date: 20140625 |