CN104166097A - Battery electric quantity measuring method - Google Patents
Battery electric quantity measuring method Download PDFInfo
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- CN104166097A CN104166097A CN201310185154.8A CN201310185154A CN104166097A CN 104166097 A CN104166097 A CN 104166097A CN 201310185154 A CN201310185154 A CN 201310185154A CN 104166097 A CN104166097 A CN 104166097A
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Abstract
The invention provides a battery electric quantity measuring method comprising the following steps: a query table is provided, and a plurality of preset measurement confirmation voltages and a plurality of preset electric quantities are stored; first voltages of measured batteries are starting points; ending points are calculated according to the query table and the starting points, and the voltages and the currents of the batteries are measured till measured voltages reach the preset measurement confirmation voltages corresponding to the ending points. Preset electric quantities from the starting points to the ending points can be calculated according to the query table. Actual electric quantities form the starting points to the ending points can be calculated. The preset electric quantities can be corrected according to difference between the actual electric quantities and the preset electric quantities.
Description
Technical field
The present invention relates to a kind of battery and measure, relate in particular to a kind of electric weight method for measurement of battery.
Background technology
Generally measuring IC(gas gauge IC with battery) method of carrying out electric weight measurement has following several haply.
The first electric weight method for measurement uses coulomb counter (coulomb counter).Coulomb counter is by the electric weight that does integral operation and obtain battery to flowing into/flow out the electric current of battery.But shortcoming is, to new battery effectively but cannot overcome the problem of cell degradation and self-discharge of battery, must after discharging completely, battery just can obtain in addition the electric weight of battery.
The second electric weight method for measurement uses open-circuit voltage (open circuit voltage, OCV) to measure.Monitor the electric weight of battery by the mutual relationship between cell voltage and charged state (state of charge, SOC).But shortcoming is that battery need be in the non-loaded electric quantity change that just can reflect.In addition, while carrying out open-circuit voltage, generally all want battery after 30 minutes, just can recover stable state in electric discharge, need one period of stand-by period so carry out electric weight measurement, cannot in battery discharge procedure, measure.
The third electric weight method for measurement uses internal resistance (internal resistance) to measure.Because the internal impedance of battery can change to some extent along with the electric weight of battery, so can predict by the internal impedance that measures battery the remaining capacity of battery.But shortcoming is, be difficult for measuring the internal impedance of battery, and when the internal resistance variation difference after cell degradation can be larger.
But the above-mentioned practice has its shortcoming, therefore need a kind of electric weight method for measurement of preferably battery.
Summary of the invention
In view of this, the present invention proposes a kind of electric weight method for measurement of battery, uses the problem that prior art is addressed that solves.
The present invention proposes a kind of electric weight method for measurement of battery.This electric weight method for measurement comprises the following steps.Question blank is provided, stores multiple default measurements and confirm voltage and multiple setting electric weight.Measure the first voltage of battery as starting point.Calculate end point according to question blank and starting point.Measure the voltage and current of battery, confirm voltage until a measurement voltage reaches the corresponding default measurement of end point.Calculate the setting electric weight of starting point to end point according to question blank.Calculate the actual electric weight of starting point to end point.And revise setting electric weight according to actual electric weight and the difference of setting electric weight.
In one embodiment of this invention, these default measurements confirm that voltage comprises full voltage (full voltage) and cut-off voltage (cutoff voltage).
In one embodiment of this invention, in the step of " calculating the setting electric weight of starting point to end point according to question blank ", if starting point drops between the N point voltage and N+1 point voltage of question blank, use interpolation method to calculate corresponding setting electric weight.
In one embodiment of this invention, question blank also stores the information about power of multiple temperature informations and corresponding each temperature information.
In one embodiment of this invention, comprising in the step of " calculating end point according to question blank and starting point ": the temperature value that measures battery; Judge whether to find temperature value from these temperature informations of question blank, if "Yes" is confirmed the default measurement of relevant temperature value that voltage is as end point, if the default measurement that "No" uses interpolation method to calculate relevant temperature value confirms that voltage is using as end point.
In one embodiment of this invention, question blank also comprises the multiple current informations of storage, and comprising in the step of " calculating end point according to question blank and starting point ": measure the electric current of battery and calculate the average current of battery in Preset Time; Judge whether to find average current from these current informations of question blank, if "Yes" is confirmed the default measurement of corresponding average current that voltage is as end point, if the default measurement that "No" uses interpolation method to calculate corresponding average current confirms that voltage is using as end point.
In one embodiment of this invention, Preset Time is 5 seconds.
In one embodiment of this invention, the electric weight method for measurement of battery also comprises the residual capacity percent that calculates battery according to the setting electric weight through revising.
The another electric weight method for measurement that proposes a kind of battery of the present invention.Electric weight method for measurement comprises the following steps.Obtain multiple battery measurement parameters every Preset Time; At least one battery according to these battery measurement parameters measures parameter generating one average current; In question blank, utilize average current to calculate the setting electric weight of a voltage range; Calculate the actual electric weight producing at voltage range; And revise setting electric weight according to actual electric weight and the difference of setting electric weight.
In one embodiment of this invention, question blank stores multiple default average currents and the information to cut-off voltage about full voltage.
In one embodiment of this invention, in the step of " utilizing the setting electric weight in average current calculating voltage interval in question blank ", if average current drops between the N voltage range and N+1 voltage range of question blank, use interpolation method to calculate corresponding setting electric weight.
Based on above-mentioned, the present invention can revise according to the difference of the setting electric weight of actual electric weight and question blank the setting electric weight of question blank in the time that the electric weight that carries out battery measures.Further can calculate the residual capacity percent of battery.The present invention does not need battery through complete discharge procedures, does not need complex calculation.Electric weight method for measurement of the present invention also improves existing open-circuit voltage and measures mode, does not need to wait for the release time of 30 minutes.Thus, can revise described setting electric weight according to battery behavior, aging result or temperature effect, can promote measurement efficiency.
Will be appreciated that, above-mentioned general description and following embodiment are only exemplary and illustrative, and it can not limit the scope that institute of the present invention wish is advocated.
Brief description of the drawings
Accompanying drawing is below a part for instructions of the present invention, and it has shown example embodiment of the present invention, and accompanying drawing is to be used for illustrating principle of the present invention with together with the description of instructions.
Fig. 1 is the process flow diagram according to the electric weight method for measurement of the battery of one embodiment of the invention.
Fig. 2 is the process flow diagram according to the electric weight method for measurement of another embodiment of the present invention.
Fig. 3 is the detail flowchart of step S213.
Fig. 4 is the process flow diagram according to the electric weight method for measurement of the battery of another embodiment of the present invention.
Reference numeral:
S110～S170: each step of the electric weight method for measurement of the battery of one embodiment of the invention
S201～S225: each step of the electric weight method for measurement of another embodiment of the present invention
The each step of details of S301～S311: step S213
S410～S450: each step of the electric weight method for measurement of the battery of another embodiment of the present invention
Embodiment
Fig. 1 is the process flow diagram according to the electric weight method for measurement of the battery of one embodiment of the invention.Refer to Fig. 1.The electric weight method for measurement of the present embodiment can comprise the following steps.
As shown in step S110, question blank (lookup table) is provided, this question blank stores multiple default measurements and confirms voltage and multiple setting electric weight, and wherein these default measurements confirm that voltage comprises full voltage (full voltage) and cut-off voltage (cutoff voltage).Therefore, question blank stores the information to cut-off voltage about full voltage.In addition, question blank also stores the information about power of multiple temperature informations and corresponding each temperature information.For example, question blank can comprise that following table 1 is to table 3.Table 1 is the 35 DEG C/1C table of comparisons, and table 2 is the 35 DEG C/0.7C table of comparisons, and table 3 is the 5 DEG C/0.1C table of comparisons.Wherein be called 1C taking 1 hour as the charge and discharge stream of benchmark, for example, " having the 1C electric current of the battery of setting electric weight 1000mAH " represents that electric current is 1000mA, and " having the 0.1C electric current of the battery of setting electric weight 1000mAH " represents that electric current is 100mA.
1(35 DEG C/1C of the table table of comparisons)
| Default measurement confirmed voltage (mV) | Set electric weight (mAH) |
| 4032(full voltage) | 4328 |
| 3932 | 152 |
| 3882 | 192 |
| 3832(is assumed to be N point) | 225 |
| 3782(is assumed to be N+1 point) | 249 |
| 3732 | 282 |
| 3682 | 329 |
| 3632 | 391 |
| 3582 | 494 |
| 3532 | 688 |
| 3482 | 591 |
| 3432 | 321 |
| 3382 | 145 |
| 3331 | 80 |
| 3232 | 89 |
| 3000(cut-off voltage) | 98 |
| 0 | 16 |
2(35 DEG C/0.7C of the table table of comparisons)
| Default measurement confirmed voltage (mV) | Set electric weight (mAH) |
| 4100 | 4293 |
| 3990 | 305 |
| 3935 | 252 |
| 3880 | 265 |
| 3825 | 301 |
| 3770 | 355 |
| 3715 | 469 |
| 3660 | 683 |
| 3605 | 816 |
| 3550 | 453 |
| 3495 | 160 |
| 3440 | 64 |
| 3384 | 41 |
| 3330 | 32 |
| 3220 | 46 |
| 3000 | 51 |
| 0 | 17 |
3(5 DEG C/0.1C of the table table of comparisons)
| Default measurement confirmed voltage (mV) | Set electric weight (mAH) |
| 4177 | 4253 |
| 4067 | 439 |
| 4012 | 279 |
| 3957 | 308 |
| 3902 | 350 |
| 3847 | 324 |
| 3792 | 472 |
| 3737 | 994 |
| 3682 | 481 |
| 3627 | 442 |
| 3572 | 59 |
| 3517 | 44 |
| 3462 | 35 |
| 3407 | 28 |
| 3297 | 43 |
| 3000 | 54 |
| 0 | 92 |
As shown in step S120, measure the first voltage of battery as starting point.In discharge procedures, measure battery, the first voltage that measurement is arrived is as starting point.For example, measure battery and obtain 35 DEG C/1C/3830mV, so starting point is set as 3830mV.
As shown in step S130, calculate end point according to question blank and starting point.For example, according to 1(35 DEG C/1C of the table table of comparisons), the first voltage 3830mV confirms that between default measurement voltage 3832mV(is assumed to be N point) and preset to measure and confirm that voltage 3782mV(is assumed to be N+1 point) between, wherein the magnitude of voltage of end point need be less than the magnitude of voltage of starting point, and therefore can obtain end point through calculating is 3782mV.
As shown in step S140, measure the voltage and current of battery, until reaching the corresponding default measurement of end point, a measurement voltage confirms voltage.
As shown in step S150, calculate the setting electric weight of starting point to end point according to question blank.
As shown in step S160, calculate the actual electric weight of starting point to end point.For example, starting point (3830mV), can be expressed as SOVstart and drop on default measurement and confirm that voltage 3832mV(is assumed to be N point, sets electric weight 225mAH) confirm that with default measurement voltage 3782mV(is assumed to be N+1 point, can be expressed as SOVend or SOV
n+1, set electric weight 249mAH) between, refer to equation (1), can use interpolation method to calculate starting point (SOVstart) to end point (SOVend or SOV
n+1) between to set accordingly electric weight be 239mAH.
As shown in step S170, revise setting electric weight according to actual discharge amount and the difference of setting electric weight.For example, the setting electric weight of supposing original battery is 1000mAH, and if actual electric weight to be less than the difference of setting electric weight be 20mAH, the setting electric weight Qmax of the battery after upgrading is that 1000mAH cuts 20mAH and equals 980mAH.
In addition, can calculate according to the setting electric weight through revising the residual capacity percent (relative state of charge, RSOC) of battery.For instance, battery discharge 10 seconds and average current are that 700mA, temperature are 35 degree C, can be according to the table 2(35 DEG C/0.7C table of comparisons) calculate; The setting electric weight of supposing original battery is 1000mAH, and the setting electric weight of the battery after renewal is 980mAH, and the calculating formula of the RSOC of original RSOC and renewal is please respectively referring to as equation (2) and (3).
Originally
…（2）。
Upgrade
…（3）。
In general, the present embodiment is in the discharge process of battery, revises the setting electric weight of question blank by actual electric weight and the difference of setting electric weight, does not need can calculate the electric weight of battery or the residual capacity percent of battery through complete discharge.In other words, the present embodiment need not additionally increase hardware or interrupt the electric discharge behavior of battery.In addition can detect by the setting electric weight of battery, the degree of aging of battery.The present embodiment also need not be set up huge form and carry out recording parameters value.Therefore, the present embodiment carries out when electric weight measures contributing to reduce the complicacy of hardware cost and interlock circuit.
Fig. 2 is the process flow diagram according to the electric weight method for measurement of the battery of another embodiment of the present invention.Refer to Fig. 2.The electric weight method for measurement of the present embodiment is the principle based on Fig. 1 embodiment and can comprising the following steps.
As shown in step S201, be written into question blank.Then as shown in step S203, set the Preset Time of timer, for example 5 seconds.
At step S205, judge whether to arrive 5 seconds, if "Yes" enters step S207, otherwise get back to step S205.
As shown in step S207, measure battery status, for example voltage/current/temperature.Then as shown in step S209, judge whether electric discharge, if "Yes" enters step S311, otherwise enter step S205.
As shown in step S211, calculate for example, average current in Preset Time (5 seconds), and the first voltage that measures battery is as starting point (can be expressed as SOVstart).Then as shown in step S213, obtain end point (can be expressed as SOVend) according to question blank and starting point calculating.Then as shown in step S215, measure the voltage and current of battery, confirm voltage until a measurement voltage reaches the corresponding default measurement of end point (SOVend), if "Yes" enters step S217, otherwise get back to step S205.
As shown in step S217, calculate the setting electric weight (QT) of starting point to end point according to question blank, and calculate the actual electric weight (QC) of starting point to end point.Then as shown in step S219, judge the whether large QT of QC, if "Yes" enters step S221, otherwise enter step S223.
As shown in step S221, represent that this interval actual electric weight (QC) is greater than setting electric weight (QT), revise the setting electric weight Qmax=Qmax+ (QC-QT) of battery, wherein the Qmax on equation the right is the value before upgrading, and the Qmax on the equation left side is the value after upgrading, then enter step S225.
As shown in step S223, represent that this interval actual electric weight (QC) is less than setting electric weight (QT), revise the setting electric weight Qmax=Qmax-(QT-QC) of battery, wherein the Qmax on equation the right is the value before upgrading, and the Qmax on the equation left side is the value after upgrading, then enter step S225.
As shown in step S225, upgrade question blank.Then get back to step S205, carry out the flow process (as step S205 to S225) of the electric weight measurement of another time.
Each details steps flow chart of step S213 will be introduced below.Refer to Fig. 3.Calculate according to question blank and starting point the step S213 that obtains end point and further comprise following step S301 to S311.
As shown in step S301, calculate average current and measuring temperature value.Then as shown in step S303, judge whether that question blank has said temperature value, if "Yes" enters step S307, otherwise enter step S305.
As shown in step S305, the voltage that utilization interpolation method is calculated corresponding said temperature value, using as end point (SOVend), then enters step S307.
As shown in step S307, judge whether that question blank has above-mentioned average current, if "Yes" enters step S311, otherwise enter step S309.
As shown in step S309, use the voltage of the corresponding above-mentioned average current of interpolation method calculating using as end point (SOVend), then enter step S311.
As shown in step S311, according to the numerical value that question blank calculated or found, end of record (EOR) point (SOVend).
Fig. 4 is the process flow diagram according to the electric weight method for measurement of the battery of another embodiment of the present invention.Refer to Fig. 4.The electric weight method for measurement of the present embodiment can comprise the following steps.
As shown in step S410, obtain multiple battery measurement parameters every Preset Time.For example, Preset Time can be 5 seconds, and these battery measurement parameters can comprise voltage, electric current, temperature, electric weight, but not as limit.
As shown in step S420, measure parameter generating one average current according at least one battery of these battery measurement parameters.
As shown in step S430, in question blank, utilize average current to calculate the setting electric weight of a voltage range.For example, when average current is that 100mA, temperature are 5 degree C, can be according to the table 3(5 DEG C/0.1C table of comparisons) calculate.Correlative detail step can imitate abovementioned steps S120 to S150 and step S211 to S217 carries out.
As shown in step S440, calculate the actual electric weight producing at voltage range.Correlative detail step can imitate abovementioned steps S160 and step S217 carries out.
As shown in step S450, revise setting electric weight according to actual electric weight and the difference of setting electric weight.Correlative detail step can imitate abovementioned steps S219 and step S225 carries out.
In sum, the embodiment of the present invention can be revised according to the difference of the setting electric weight of actual electric weight and question blank the setting electric weight of question blank in the time that the electric weight that carries out battery measures.Further can calculate the residual capacity percent of battery.The embodiment of the present invention does not need battery through complete discharge procedures, does not need complex calculation.The electric weight method for measurement of the embodiment of the present invention also improves existing open-circuit voltage and measures mode, does not need to wait for the release time of 30 minutes.Thus, can revise described setting electric weight according to battery behavior, aging result or temperature effect, can promote measurement efficiency.
Although the present invention discloses as above with embodiment, so it is not in order to limit the present invention, and any person of an ordinary skill in the technical field, when doing a little change and retouching, and does not depart from the spirit and scope of the present invention.
In addition, arbitrary embodiment of the present invention or claim must not reached disclosed whole objects or advantage or feature.In addition, summary part and title are only for the use of auxiliary patent document search, are not used for limiting the scope of the invention.
Claims (14)
1. an electric weight method for measurement for battery, comprising:
One question blank is provided, stores multiple default measurements and confirm voltage and multiple setting electric weight;
Measure one first voltage of this battery as a starting point;
Calculate an end point according to this question blank and this starting point;
Measure the voltage and current of this battery, confirm voltage until a measurement voltage reaches corresponding default measurement of this end point;
Calculate this starting point to one of this end point according to this question blank and set electric weight;
Calculate the actual electric weight of this starting point to this end point; And
Revise this setting electric weight according to the difference of this actual electric weight and this setting electric weight.
2. electric weight method for measurement according to claim 1, wherein those default measurements confirm that voltage comprises full voltage and cut-off voltage.
3. electric weight method for measurement according to claim 1, wherein in the step of " calculating this starting point this setting electric weight to this end point according to this question blank ", if this starting point drops between a N point voltage and a N+1 point voltage of this question blank, use interpolation method to calculate corresponding this setting electric weight.
4. electric weight method for measurement according to claim 1, wherein this question blank also stores the information about power of multiple temperature informations and corresponding each temperature information.
5. electric weight method for measurement according to claim 4, wherein comprising in the step of " calculating this end point according to this question blank and this starting point ":
Measure a temperature value of this battery;
Judge whether to find this temperature value from those temperature informations of this question blank, if "Yes" confirms that using default measurement that mutually should temperature value voltage is as this end point, if "No" use interpolation method calculate mutually should temperature value default measurement confirm that voltage is using as this end point.
6. electric weight method for measurement according to claim 1, wherein this question blank also stores multiple current informations, and comprising in the step of " calculating this end point according to this question blank and this starting point ":
Measure the electric current of this battery and calculate the average current of this battery in a Preset Time;
Judge whether to find this average current from those current informations of this question blank, if "Yes" confirms that using default measurement that mutually should average current voltage is as this end point, if "No" use interpolation method calculate mutually should average current default measurement confirm that voltage is using as this end point.
7. electric weight method for measurement according to claim 6, wherein this Preset Time is 5 seconds.
8. electric weight method for measurement according to claim 1, also comprises:
According to the residual capacity percent that calculates this battery through this setting electric weight of revising.
9. an electric weight method for measurement for battery, comprising:
Obtain multiple battery measurement parameters every a Preset Time;
At least one battery according to those battery measurement parameters measures parameter generating one average current;
In a question blank, utilize this average current to calculate one of a voltage range and set electric weight;
Calculate the actual electric weight producing at this voltage range; And
Revise this setting electric weight according to the difference of this actual electric weight and this setting electric weight.
10. electric weight method for measurement according to claim 9, wherein this question blank stores multiple default average currents and the information to cut-off voltage about full voltage.
11. electric weight method for measurement according to claim 10, wherein in the step of " utilizing this average current to calculate this setting electric weight of this voltage range in this question blank ", if this average current drops between a N voltage range and a N+1 voltage range of this question blank, use interpolation method to calculate corresponding this setting electric weight.
12. electric weight method for measurement according to claim 9, wherein this question blank also stores the information about power of multiple temperature informations and corresponding each temperature information.
13. electric weight method for measurement according to claim 9, wherein this Preset Time is 5 seconds.
14. electric weight method for measurement according to claim 9, also comprise:
According to the residual capacity percent that calculates this battery through this setting electric weight of revising.
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Cited By (5)
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| CN106603874A (en) * | 2017-02-27 | 2017-04-26 | 维沃移动通信有限公司 | Mobile terminal electric quantity display method and mobile terminal |
| CN106814321A (en) * | 2015-12-02 | 2017-06-09 | 海洋王（东莞）照明科技有限公司 | The circuit and hand-hold lamp fitting of battery electric quantity are surveyed in temperature-compensating |
| CN107907832A (en) * | 2017-09-29 | 2018-04-13 | 金卡智能集团股份有限公司 | Measuring instrument remaining battery capacity calculation method |
| CN111555389A (en) * | 2020-05-15 | 2020-08-18 | 歌尔智能科技有限公司 | Method, device and equipment for calculating battery electric quantity and computer readable storage medium |
| CN115575824A (en) * | 2022-11-21 | 2023-01-06 | 陕西银河景天电子有限责任公司 | Battery electric quantity estimation method and device for autonomous learning |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6281683B1 (en) * | 1999-02-02 | 2001-08-28 | Enrev Corporation | Rapid determination of present and potential battery capacity |
| CN1437030A (en) * | 2002-02-06 | 2003-08-20 | 群光电子股份有限公司 | Accumulator electric-quantity monitoring device and method |
| CN101153894B (en) * | 2006-09-26 | 2010-09-29 | 鸿富锦精密工业（深圳）有限公司 | Electricity quantity detecting method, electricity quantity detecting system and electronic equipment using the same method |
| CN101320079A (en) * | 2008-06-25 | 2008-12-10 | 哈尔滨工业大学 | Computing method for battery electric quantity state |
| CN102680897B (en) * | 2011-03-15 | 2014-10-29 | 联芯科技有限公司 | Battery capacity management method and device |
| CN102854471B (en) * | 2012-09-06 | 2016-01-13 | 北京百纳威尔科技有限公司 | Battery meter metering method and measuring apparatus |
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| CN106814321A (en) * | 2015-12-02 | 2017-06-09 | 海洋王（东莞）照明科技有限公司 | The circuit and hand-hold lamp fitting of battery electric quantity are surveyed in temperature-compensating |
| CN106603874A (en) * | 2017-02-27 | 2017-04-26 | 维沃移动通信有限公司 | Mobile terminal electric quantity display method and mobile terminal |
| CN106603874B (en) * | 2017-02-27 | 2019-03-05 | 维沃移动通信有限公司 | A kind of method that mobile terminal electricity is shown and mobile terminal |
| CN107907832A (en) * | 2017-09-29 | 2018-04-13 | 金卡智能集团股份有限公司 | Measuring instrument remaining battery capacity calculation method |
| CN107907832B (en) * | 2017-09-29 | 2020-01-21 | 金卡智能集团股份有限公司 | Metering instrument battery residual capacity calculation method |
| CN111555389A (en) * | 2020-05-15 | 2020-08-18 | 歌尔智能科技有限公司 | Method, device and equipment for calculating battery electric quantity and computer readable storage medium |
| CN115575824A (en) * | 2022-11-21 | 2023-01-06 | 陕西银河景天电子有限责任公司 | Battery electric quantity estimation method and device for autonomous learning |
| CN115575824B (en) * | 2022-11-21 | 2024-04-30 | 陕西银河景天电子有限责任公司 | Autonomous learning battery power estimation method and device |
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