CN104991196A - Battery power measurement method - Google Patents
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- CN104991196A CN104991196A CN201510374734.0A CN201510374734A CN104991196A CN 104991196 A CN104991196 A CN 104991196A CN 201510374734 A CN201510374734 A CN 201510374734A CN 104991196 A CN104991196 A CN 104991196A
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Abstract
The invention discloses a battery power measurement method. The method comprises steps of S1, obtaining current charge-discharge cycles of a to-be-measured battery; S2, matching the charge-discharge cycles with charge-discharge cycle sections, so as to obtain battery charge-discharge curve forms corresponding to the charge-discharge cycle sections matched with the charge-discharge cycles; S3, calculating the inner resistance of the to-be-measured battery; S4, when the inner resistance is in a standard inner resistance section, calculating the current power percentage according to a corresponding battery charge-discharge curve in the standard inner resistance section; and S5, calculating the power percentage of the to-be-measured battery according to the battery charge-discharge curve within a preset time. The invention establishes multiple battery charge-discharge curve forms according to different charge-discharge cycles of a battery, analyzes change in battery resistance with the combination of the practical battery usage, and provides high-precision battery power for users.
Description
Technical field
The present invention relates to field of mobile terminals, particularly relate to a kind of high-precision battery power measuring method.
Background technology
Mobile terminal is in the market mostly lithium battery, in user's use procedure, much bigger when can find that the more and more inaccurate ratio of battery electric quantity number percent saltus step is just bought after particularly using 1-2, be easy to be finished after particularly reaching the electricity of 20%.Calculating the method for battery capacity of mobile terminal is all mobile terminal when dispatching from the factory, and the battery of often kind of mobile terminal has that individual battery electric quantity voltage temperature is corresponding shows (charging and discharging curve table).In the process that mobile terminal uses, the battery electric quantity number percent being shown to user mainly by charging and discharging curve table and relevant algorithm converted.In the use procedure of battery, particularly through high temperature with after overcharging/cross and the bad operation such as putting, the spendable capacity of battery is fewer and feweri.These mainly increase owing to being oxidized the internal resistance of cell caused.And battery electric quantity number percent be the charging and discharging curve table that dispatches from the factory with battery for foundation, thus electricity display is inaccurate, and particularly battery electric quantity is more and more inaccurate between 0-20%.Therefore cause the actual charging and discharging curve deviation of battery increasing, the battery electric quantity of display is also more and more inaccurate.
Summary of the invention
For the problems referred to above that existing battery power amount calculation method exists, now provide a kind of and be intended to realize being changed to according to the internal resistance of cell battery power measuring method that user provides high accuracy battery electricity.
Concrete technical scheme is as follows:
A kind of battery power measuring method, there is provided a plurality of battery charging and discharging curve list to treat measurement battery and carry out electrical measurement, the corresponding discharge and recharge time intervals of each described battery charging and discharging curve list, in order to the battery charging and discharging curve in the preset temperature interval that expression is corresponding in described discharge and recharge time intervals and corresponding standard internal resistance value interval; Described battery power measuring method comprises the steps:
S1. the current discharge and recharge number of times of described battery to be measured is obtained;
S2. described discharge and recharge number of times is mated with described discharge and recharge time intervals, to obtain the described battery charging and discharging curve list corresponding with the described discharge and recharge time intervals that described discharge and recharge number of times mates;
S3. the internal resistance of cell value of described battery to be measured is calculated;
S4., when described internal resistance of cell value is in described standard internal resistance value interval, the current electricity number percent of described battery to be measured is calculated according to the interval corresponding described battery charging and discharging curve of described standard internal resistance value;
S5. with the electricity number percent of the schedule time according to the described battery to be measured of described battery charging and discharging curve calculating.
Preferably, described step S3 comprises:
S31. the voltage and current of described battery to be measured is gathered;
S32. the internal resistance of cell value of battery to be measured according to the described voltage of described battery to be measured and described Current calculation.
Preferably, described step S4 comprises step S41, when described internal resistance of cell value is not in described standard internal resistance value interval, and the accumulative read-around ratio of described internal resistance of cell value not in described standard internal resistance value interval;
S42., when described read-around ratio is less than described preset times, return and perform described step S3.
Preferably, described step S4 also comprises steps A 43, when described read-around ratio equals described preset times, gathers the current temperature value of described battery to be measured;
S44. described temperature value is carried out mating to the described preset temperature interval of described battery charging and discharging curve list and obtain corresponding described battery charging and discharging curve;
S45. calculate the current electricity number percent of described battery to be measured according to described battery charging and discharging curve, perform described step S5.
Preferably, providing a storage element for storing the discharge and recharge number of times of described battery to be tested, in described step S1, obtaining described discharge and recharge number of times by reading described storage element.
Preferably, also comprise after executing described step S5:
S6. complete a charging-discharging cycle, namely described discharge and recharge number of times adds 1, and stores.
Preferably, comprise after executing described step S6:
A1., when corresponding with described battery charging and discharging curve list when described discharge and recharge number of times described discharge and recharge time intervals is mated, described step S3 is performed.
Preferably, comprise after executing described step S6:
B1., when corresponding with described battery charging and discharging curve list when described discharge and recharge number of times described discharge and recharge time intervals is not mated, the current described internal resistance of cell value of described battery to be measured is calculated;
B2., when the internal resistance of cell value of described battery to be measured is in the described standard internal resistance value interval of described battery charging and discharging curve list, the current electricity number percent of described battery to be measured is calculated according to the interval corresponding described battery charging and discharging curve of described standard internal resistance value; Perform described step S5.
Preferably, also comprise:
B3., when the internal resistance of cell value of described battery to be measured is not in the described standard internal resistance value interval of described battery charging and discharging curve list, Trigger update battery data interrupt notification, performs described step S2.
The beneficial effect of technique scheme:
In the technical program, the discharge and recharge number of times different according to battery sets up multiple battery charging and discharging curve lists, in conjunction with the use of actual battery, analyzes the change of the internal resistance of cell, for user provides high-precision battery electric quantity.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the first embodiment of battery power measuring method of the present invention;
Fig. 2 is the method flow diagram of the second embodiment of battery power measuring method of the present invention;
Fig. 3 is the method flow diagram of the 3rd embodiment of battery power measuring method of the present invention;
Fig. 4 is the method flow diagram of the 4th embodiment of battery power measuring method of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
The present invention is based on following discovery:
Battery is generally 500 charging-discharging cycle actual life.A charging-discharging cycle means that all electricity of battery are by completely using sky, then is charged to full process by sky, this be not equal to fill once electricity.Such as: one piece of lithium battery has only used the electricity of half at first day, then again for it is full of electricity; If second day also so, namely just fills by half, twice charging is got off just as a charging-discharging cycle, instead of two.Therefore, usually charge through several times possibly and just complete one-period.Often complete a charging-discharging cycle, battery capacity will reduce a bit.But, it is very little that this electricity reduces amplitude, and after the battery of high-quality filled repeatedly the cycle, still can retain 80% of raw capacity, a lot of lithium battery power supply product still can as usual use after 1 year.
Once battery has descended production line.The serviceable life of lithium battery only has several years usually.The decline of battery capacity increases (this is the main cause causing battery capacity to decline) owing to being oxidized the internal resistance caused.Last electrolytic tank resistance can reach certain point, although at this moment battery is full of electricity, battery can not discharge the electricity stored.The aging speed of lithium battery is mainly determined by temperature and charged state.Table 1 represents the difference of charge capacity battery capacities in identical service time different in certain temperature range.
Table 1
When high charge state and battery temperature increase as shown in Table 1, battery capacity easily declines.
If battery is charged to 40% to be positioned over shady and cool place, the protection circuit of battery self can be made in long storage life to operate.If under the battery being full of electricity is placed in high temperature, great infringement can be caused to battery.Such as: when using fixed power source, battery is in fully charged state, and temperature is generally between 25 DEG C-30 DEG C, can damage battery, causes its capacity to decline.Usual user, when reality uses battery, inevitably there will be above-mentioned high charge and the condition of high temperature.
Based on the problems referred to above, the present invention aims to provide the battery power measuring method that a kind of temperature to battery and charging-discharging cycle carry out binding analysis.
As shown in Figure 1, a kind of battery power measuring method, there is provided a plurality of battery charging and discharging curve list to treat measurement battery and carry out electrical measurement, the corresponding discharge and recharge time intervals of each battery charging and discharging curve list, in order to the battery charging and discharging curve in the preset temperature interval that expression is corresponding in discharge and recharge time intervals and corresponding standard internal resistance value interval; Battery power measuring method comprise the steps:
S1. the current discharge and recharge number of times of battery to be measured is obtained;
S2. discharge and recharge number of times is mated with discharge and recharge time intervals, with the battery charging and discharging curve list that the discharge and recharge time intervals obtained with discharge and recharge number of times mates is corresponding;
S3. the internal resistance of cell value of battery to be measured is calculated;
S4., when internal resistance of cell value is in standard internal resistance value interval, the current electricity number percent of battery to be measured is calculated according to the interval corresponding battery charging and discharging curve of standard internal resistance value;
S5. to calculate the electricity number percent of battery to be measured according to battery charging and discharging curve with the schedule time.
Further, discharge and recharge number of times that can be different according to battery, (0-100,101-200 in units of every hundred times, 201-300,301-400,401-500) make corresponding battery charging and discharging curve list, under battery charging and discharging curve list is included in different temperatures (-20 DEG C-0 DEG C, 1 DEG C-25 DEG C, 26 DEG C-40 DEG C, 41 DEG C-60 DEG C) internal resistance value of battery is interval, the battery datas such as the battery open circuit voltage that each electricity number percent is corresponding.In mobile terminal use procedure, the discharge and recharge number of times according to record calls different battery charging and discharging curves, reaches the electricity number percent of accurately display battery.
The discharge and recharge number of times different according to battery provides multiple battery charging and discharging curve lists, in conjunction with the use of actual battery, analyzes the change of the internal resistance of cell, for user provides high-precision battery electric quantity.
In a preferred embodiment, step S3 comprises:
S31. the voltage and current of battery to be measured is gathered;
S32. the internal resistance of cell value of battery to be measured is calculated according to the voltage and current of battery to be measured.
In the present embodiment, by calculating the present battery internal resistance value of battery to be measured according to the voltage and current of the battery to be measured collected.
An accessible variable resistor is as the load of battery to be measured, adjust variable-resistance resistance to obtain the corresponding current value of battery and magnitude of voltage, adjustment variable resistor makes electric current be increased to another numerical value second time and records corresponding current value and magnitude of voltage again, and the numerical value that the pressure drop difference added value of two primary currents being removed twice voltage obtains is internal resistance of cell value.Because the method obtaining internal resistance of cell value is that prior art is so place repeats no more.
As shown in Figure 2, in a preferred embodiment, step S4 comprises step S41, when internal resistance of cell value is not in standard internal resistance value interval, and the accumulative read-around ratio of internal resistance of cell value not in standard internal resistance value interval;
S42., when read-around ratio is less than preset times, return and perform step S3.
In the present embodiment, when the standard internal resistance value of internal resistance of cell value not in the battery charging and discharging curve list of the correspondence of the current discharge and recharge number of times of battery to be measured is interval, the read-around ratio of the internal resistance of cell value that need add up not in standard internal resistance value interval; It is 3 times for preset times, when read-around ratio is less than 3 times, the internal resistance of cell value of battery to be measured can be recalculated, to rejudge internal resistance of cell value whether in the standard internal resistance value interval of battery charging and discharging curve list, to improve the accuracy that battery electric quantity is measured.
As shown in Figure 2, in a preferred embodiment, step S4 also comprises step S43, when read-around ratio equals preset times, gathers the current temperature value of battery to be measured;
S44. temperature value is carried out mating to the preset temperature interval of battery charging and discharging curve list and obtain corresponding battery charging and discharging curve;
S45. calculate the current electricity number percent of battery to be measured according to battery charging and discharging curve, perform step S5.
In the present embodiment, when the read-around ratio of internal resistance of cell value not in standard internal resistance value interval equals 3 times, gather the current temperature value of battery to be measured, in the battery charging and discharging curve list corresponding with the discharge and recharge time intervals that discharge and recharge number of times mates, the preset temperature matched is obtained interval according to current temperature value, to obtain corresponding battery charging and discharging curve interval with preset temperature, the electricity number percent current according to this battery charging and discharging curved measurement battery to be measured, thus the accuracy that the battery electric quantity improved is measured.
By judging charging-discharging cycle during each mobile terminal-opening, tentatively determine the battery charging and discharging curve list needing to load.Owing to easily there is when the actual use of battery the situation that super-charge super-discharge number of times is too much, internal resistance of cell value has certain discrepancy with the corresponding internal resistance of cell of actual discharge and recharge number of times.In order to improve precision, must in conjunction with the cell voltage of multiple repairing weld and electric current, to calculate current internal resistance of cell value.Judge, with the difference range of the corresponding internal resistance of cell in the battery data of actual loaded, to determine that suitable battery charging and discharging curve list is to load, and calculates the data such as accurate battery electric quantity number percent.
In a preferred embodiment, providing a storage element for storing the discharge and recharge number of times of battery to be tested, in step S1, obtaining discharge and recharge number of times by reading storage element.
As shown in Figure 3, in a preferred embodiment, also comprise after execution of step S5:
S6. complete a charging-discharging cycle, namely discharge and recharge number of times adds 1, and stores.
In a preferred embodiment, comprise after execution of step S6:
A1., when corresponding with battery charging and discharging curve list when discharge and recharge number of times discharge and recharge time intervals is mated, step S3 is performed.
In the process of battery charging, if complete a charging-discharging cycle, discharge and recharge number of times is needed to add 1, and judge whether the discharge and recharge time intervals that discharge time is corresponding with battery charging and discharging curve list mates, if coupling, then calculate the internal resistance of cell value of battery to be measured, obtain corresponding battery charging and discharging curve according to internal resistance of cell value, thus measure the current electricity number percent of battery to be measured.
As shown in Figure 4, in a preferred embodiment, comprise after execution of step S6:
B1., when corresponding with battery charging and discharging curve list when discharge and recharge number of times discharge and recharge time intervals is not mated, the present battery internal resistance value of battery to be measured is calculated;
B2., when the internal resistance of cell value of battery to be measured is in the standard internal resistance value interval of battery charging and discharging curve list, the current electricity number percent of battery to be measured is calculated according to the interval corresponding battery charging and discharging curve of standard internal resistance value; Perform step S5.
In the process of battery charging, if complete a charging-discharging cycle, discharge and recharge number of times is needed to add 1, and judge whether the discharge and recharge time intervals that discharge time is corresponding with battery charging and discharging curve list mates, if do not mate, then calculate the present battery internal resistance value of battery to be measured, judge that the internal resistance of cell value of battery to be measured is whether in the standard internal resistance value interval of battery charging and discharging curve list, if the internal resistance of cell value of battery to be measured is in the standard internal resistance value interval of battery charging and discharging curve list, then current to battery to be measured according to the interval corresponding battery charging and discharging curve of standard internal resistance value electricity is measured.
As shown in Figure 4, in a preferred embodiment, also comprise:
B3., when the internal resistance of cell value of battery to be measured is not in the standard internal resistance value interval of battery charging and discharging curve list, Trigger update battery data interrupt notification, performs step S2.
In the present embodiment, in the process of battery charging, if complete a charging-discharging cycle, discharge and recharge number of times is needed to add 1, and judge whether the discharge and recharge time intervals that discharge time is corresponding with battery charging and discharging curve list mates, if do not mate, calculate the present battery internal resistance value of battery to be measured, judge that the internal resistance of cell value of battery to be measured is whether in the standard internal resistance value interval of battery charging and discharging curve list, if the internal resistance of cell value of battery to be measured is not in the standard internal resistance value interval of battery charging and discharging curve list, then Trigger update battery data interrupt notification, again discharge and recharge number of times is mated with discharge and recharge time intervals.
If discharge and recharge number of times meets the condition of every hundred times in battery of mobile terminal use procedure, then recombine present battery internal resistance value and corresponding battery charging and discharging curve list measurement battery electric quantity.If the battery charging and discharging curve list of current use changes to some extent, need to reload.Mobile terminal is notified, to guarantee the accuracy of battery data by the mode of triggered interrupts.
The foregoing is only preferred embodiment of the present invention; not thereby embodiments of the present invention and protection domain is limited; to those skilled in the art; should recognize and all should be included in the scheme that equivalent replacement done by all utilizations instructions of the present invention and diagramatic content and apparent change obtain in protection scope of the present invention.
Claims (9)
1. a battery power measuring method, it is characterized in that, there is provided a plurality of battery charging and discharging curve list to treat measurement battery and carry out electrical measurement, the corresponding discharge and recharge time intervals of each described battery charging and discharging curve list, in order to the battery charging and discharging curve in the preset temperature interval that expression is corresponding in described discharge and recharge time intervals and corresponding standard internal resistance value interval; Described battery power measuring method comprises the steps:
S1. the current discharge and recharge number of times of described battery to be measured is obtained;
S2. described discharge and recharge number of times is mated with described discharge and recharge time intervals, to obtain the described battery charging and discharging curve list corresponding with the described discharge and recharge time intervals that described discharge and recharge number of times mates;
S3. the internal resistance of cell value of described battery to be measured is calculated;
S4., when described internal resistance of cell value is in described standard internal resistance value interval, the current electricity number percent of described battery to be measured is calculated according to the interval corresponding described battery charging and discharging curve of described standard internal resistance value;
S5. with the electricity number percent of the schedule time according to the described battery to be measured of described battery charging and discharging curve calculating.
2. battery power measuring method as claimed in claim 1, it is characterized in that, described step S3 comprises:
S31. the voltage and current of described battery to be measured is gathered;
S32. the internal resistance of cell value of battery to be measured according to the described voltage of described battery to be measured and described Current calculation.
3. battery power measuring method as claimed in claim 1, it is characterized in that, described step S4 comprises step S41, when described internal resistance of cell value is not in described standard internal resistance value interval, and the accumulative read-around ratio of described internal resistance of cell value not in described standard internal resistance value interval;
S42., when described read-around ratio is less than described preset times, return and perform described step S3.
4. battery power measuring method as claimed in claim 3, it is characterized in that, described step S4 also comprises step S43, when described read-around ratio equals described preset times, gathers the current temperature value of described battery to be measured;
S44. described temperature value is carried out mating to the described preset temperature interval of described battery charging and discharging curve list and obtain corresponding described battery charging and discharging curve;
S45. calculate the current electricity number percent of described battery to be measured according to described battery charging and discharging curve, perform described step S5.
5. battery power measuring method as claimed in claim 1, is characterized in that, providing a storage element for storing the discharge and recharge number of times of described battery to be tested, obtains described discharge and recharge number of times in described step S1 by reading described storage element.
6. battery power measuring method as claimed in claim 1, is characterized in that, also comprise after executing described step S5:
S6. complete a charging-discharging cycle, namely described discharge and recharge number of times adds 1, and stores.
7. battery power measuring method as claimed in claim 6, is characterized in that, comprise after executing described step S6:
A1., when corresponding with described battery charging and discharging curve list when described discharge and recharge number of times described discharge and recharge time intervals is mated, described step S3 is performed.
8. battery power measuring method as claimed in claim 6, is characterized in that, comprise after executing described step S6:
B1., when corresponding with described battery charging and discharging curve list when described discharge and recharge number of times described discharge and recharge time intervals is not mated, the current described internal resistance of cell value of described battery to be measured is calculated;
B2., when the internal resistance of cell value of described battery to be measured is in the described standard internal resistance value interval of described battery charging and discharging curve list, the current electricity number percent of described battery to be measured is calculated according to the interval corresponding described battery charging and discharging curve of described standard internal resistance value; Perform described step S5.
9. battery power measuring method as claimed in claim 8, is characterized in that, also comprise:
B3., when the internal resistance of cell value of described battery to be measured is not in the described standard internal resistance value interval of described battery charging and discharging curve list, Trigger update battery data interrupt notification, performs described step S2.
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| CN106814330A (en) * | 2017-01-12 | 2017-06-09 | 珠海市魅族科技有限公司 | Electric quantity metering method and device |
| TWI601358B (en) * | 2017-01-20 | 2017-10-01 | Battery resistance information can be displayed uninterruptible power system | |
| CN107565643A (en) * | 2017-09-22 | 2018-01-09 | 惠州Tcl移动通信有限公司 | Start method, storage device and the terminal of battery charging based on consumption electric power detection |
| CN107589380A (en) * | 2017-09-21 | 2018-01-16 | 天津市峰晟达电池有限公司 | A kind of lithium thionyl chloride cell power testing system |
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| CN112731177A (en) * | 2020-12-21 | 2021-04-30 | 深圳市凯迪仕智能科技有限公司 | Method and device for detecting electric quantity of dry battery |
| CN113162164A (en) * | 2021-04-09 | 2021-07-23 | Tcl通讯（宁波）有限公司 | Battery electric quantity display method, terminal and computer readable storage medium |
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| TWI613454B (en) * | 2016-08-30 | 2018-02-01 | 太普電子（常熟）有限公司 | Full charge capacity (fcc) calibration method |
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| TWI601358B (en) * | 2017-01-20 | 2017-10-01 | Battery resistance information can be displayed uninterruptible power system | |
| CN107589380A (en) * | 2017-09-21 | 2018-01-16 | 天津市峰晟达电池有限公司 | A kind of lithium thionyl chloride cell power testing system |
| CN107565643A (en) * | 2017-09-22 | 2018-01-09 | 惠州Tcl移动通信有限公司 | Start method, storage device and the terminal of battery charging based on consumption electric power detection |
| CN107565643B (en) * | 2017-09-22 | 2022-03-01 | 惠州Tcl移动通信有限公司 | Method for starting battery charging based on power consumption detection, storage device and terminal |
| CN113285499A (en) * | 2020-02-19 | 2021-08-20 | 北京小米移动软件有限公司 | Charging control method, electronic device, control device, and storage medium |
| CN112731177A (en) * | 2020-12-21 | 2021-04-30 | 深圳市凯迪仕智能科技有限公司 | Method and device for detecting electric quantity of dry battery |
| CN113162164A (en) * | 2021-04-09 | 2021-07-23 | Tcl通讯（宁波）有限公司 | Battery electric quantity display method, terminal and computer readable storage medium |
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Application publication date: 20151021 |