CN101231327B - Apparatus and method for measuring battery allowance - Google Patents
Apparatus and method for measuring battery allowance Download PDFInfo
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- CN101231327B CN101231327B CN2007100198915A CN200710019891A CN101231327B CN 101231327 B CN101231327 B CN 101231327B CN 2007100198915 A CN2007100198915 A CN 2007100198915A CN 200710019891 A CN200710019891 A CN 200710019891A CN 101231327 B CN101231327 B CN 101231327B
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Abstract
The invention discloses a device for measuring battery residual capacity without using an IC meter, which can effectively measure residual capacity, and a method thereof. The measurement method of the invention comprises the following steps of: performing periodic measurements for N times to the battery voltage, and calculating the average voltage for measuring the battery residual capacity; and if the measured average voltage is within a set voltage range, measuring the actual current voltage again, and calculating the average battery voltage based on the average voltage of the voltage measurements of N times and actual current voltage, so as to measure battery residual capacity. The method changes different testing methods according to the discharge characteristics of battery, so as to shorten operating times of the system, thereby effectively measuring battery residual capacity.
Description
Technical field
The invention relates to and measure battery allowance.Particularly utilize AD converter to read battery voltage value under the situation of IC instrument not using or do not have, determine the measuring battery allowance device and method of battery allowance.
Background technology
Recently, begin with mobile phone and notebook computer, PDA, digital camera, the contour performance of various multimedia player, high most advanced and sophisticated machine is tending towards commercialization gradually.
It is exactly battery that this type of product is made a portable core.Be the microminiaturization that this type of machine is done, lightweight, their employed battery also wants microminiaturized as much as possible, lightweight.Now, for the service time that makes product more lasting, use the highdensity technology of high-energy developing at high speed.
In addition, how an important problem of Chan Shenging thereupon will be measured the battery consumption amount exactly and how grasp serviceable life of these multimedia players, and find out relevant countermeasure is a problem that urgent need will solve.
In the battery that uses now, be provided with a kind of battery IC meter, it can detect the surplus of battery, and the information of relevant surplus is provided, it can detect current battery allowance, and the multiple information such as temporal information that can continue to use according to surplus are provided.
But, this IC meter that can detect battery allowance is not set in some battery.In this case, the AD converter of utilisation system,, detects the surplus of battery in the mode of mean value that detected voltage is provided with certain cycle detection N time the voltage of battery.
Fig. 1 is the discharge curve coordinate diagram of battery discharge capacity.
With reference to Fig. 1, general battery ceiling voltage is under the situation of 5V, and along with the growth of time, battery discharges (perhaps crying consumption), and as shown in the figure, voltage is in the 3.7-3.8V interval time, and the angle change of discharge curve is very slow.
Battery shown in above-mentioned discharge curve does not have under the situation of IC meter in inside, and in order to detect the surplus of battery, AD converter is carried out voltage detecting N time, calculate the mean value of voltage, measure the mode of battery allowance with this, in the interval of voltage 3.7-3.8V, this step is unnecessary.
Certainly, utilize the words of mean value calculation can compare relatively accurately, but in the little interval of this angle change, CPU carry out unnecessary operation, and is instead very big to the consumption of electric power.Promptly, the meaning in the interval that angle change is little in other words in this section interval the variation of voltage very little, so in this section interval, carry out the voltage detecting of continuous N second periodicity, come the mean value of calculating voltage, and making CPU carry out repeatedly computing, all is unnecessary and meaningless thing.
Summary of the invention
The present invention produces in order to solve the above problems, and it is a kind of that its purpose is to provide, in the battery discharge curve, in the smaller interval of angle change, only read the numerical value of primary voltage, utilize data in the past, thereby can improve the measuring battery allowance device and method of determination efficiency.
To achieve these goals, battery allowance pick-up unit of the present invention, has voltage determination portion, it is measured the voltage of battery, promptly under the effect of control signal, control above-mentioned voltage determination portion, by first mode surplus of battery is measured, when above-mentioned cell voltage is in definite voltage range, measured the surplus of battery by second mode.
That is, measuring battery allowance device of the present invention is characterized in that, comprising:
Voltage determination portion, it is measured the voltage of above-mentioned battery under the effect of control signal, that is, by above-mentioned voltage determination portion is controlled, make it carry out (1-N) voltage determination N time, utilizes the mean value of N magnitude of voltage to measure battery allowance;
Control part, it is when in the voltage range that the mean value of above-mentioned N magnitude of voltage is being set, control above-mentioned voltage determination portion and carry out once new mensuration, remove outside the value of measuring at first in magnitude of voltage that utilization records and previous N the magnitude of voltage of measuring (1-N), after remaining (2-N) individual magnitude of voltage addition, calculate the mean value of voltage again.
On the other hand, measuring battery allowance method of the present invention comprises following step: earlier the voltage of battery is carried out the mensuration of N second periodicity, calculate the mean value of voltage, determine the step of battery allowance with this; If the average voltage level that said determination goes out is in the voltage range of setting, then current virtual voltage is once measured again, utilize the mean value of the magnitude of voltage of before measuring N time and the mean value that current actual voltage value comes counting cell voltage, carry out the step of measuring battery allowance with this;
Foundation measuring battery allowance device of the present invention and assay method are in the little interval of the tilt angle varied in curve, previous battery voltage value of measuring of utilization and the current virtual voltage pH-value determination pH battery allowance of measuring.This method can improve the efficient that battery is measured.
As mentioned above, have following effect according to measuring battery allowance device and method of the present invention, according to the flash-over characteristic of battery, the assay method that conversion is different, the number of run of reduction system is measured the device and method of battery allowance effectively.
Description of drawings
Fig. 1 is the discharge curve coordinate diagram of battery discharge capacity;
Fig. 2 is the structure block diagram of measuring battery allowance device of the present invention;
Fig. 3 is the process flow diagram according to the measuring battery allowance method in the embodiments of the invention;
Fig. 4 is the process flow diagram according to the system power supply closing motion of above-mentioned Fig. 3.
Description of reference numerals:
210:CPU (central processing unit)
The 220,230: the 1st and the 2AD converter
250: battery
240: resistance
Embodiment
Below, be elaborated with reference to the embodiment of accompanying drawing to measuring battery allowance device of the present invention and assay method.But, known technology in the prior art is partly omitted.
Fig. 2 is the block diagram of the structure of measuring battery allowance device of the present invention.
With reference to Fig. 2, in order to measure the surplus of battery 250, this device comprises: the 1AD converter 220 of measuring battery (+) (-) two interpolar voltages; 220 resistance that are connected 240 of above-mentioned battery and 1AD converter; In order to measure the voltage of battery, measure the 2AD converter 230 of above-mentioned resistance 240 voltages; Can control 1AD converter 220 and 2AD converter 230, make its operation measure the voltage of battery 250, and calculate the CPU210 of battery allowance;
Above-mentioned 1AD converter 220 and 2AD converter 230 convert the magnitude of voltage that records to the computer simulation voltage data and export, and CPU210 will utilize the magnitude of voltage of above-mentioned output to come the surplus of counting cell 250.
In addition, the said determination device also is provided with display and other multi-purpose devices of a magnitude of voltage in order to show the surplus of battery 250, at this, has omitted the detailed description of relevant these devices.
CPU210 uses the 1st mode, and control operation 1AD converter 220 and 2AD converter 230 carry out the mensuration of N second periodicity to voltage, measure the magnitude of voltage of battery 250 by the mean value of calculating voltage.
But, in the little 3.7-3.8V interval of the angle change of CPU210 in the battery discharge curve, not that the magnitude of voltage that utilizes 1AD converter 220 and 2AD converter to read for 230N time calculates, but carry out once new mensuration, the value of the voltage that utilization is measured, the value deletion that records at first in the data with first before measurement, and utilize the up-to-date value that records to come the mean value of counting cell voltage.
As mentioned above, utilize second mode to measure the method for battery allowance, can be according to the difference of battery 250 capacity, the interval that the tilt angle varied in the corresponding discharge curve is little is also different, changes and changes by external control signal.
In addition, CPU210 is according to the function of system, if magnitude of voltage reaches below certain voltage levvl, in order to protect each system, CPU210 can the executive system closing motion.
Measuring battery allowance method of the present invention is as described below,
Fig. 3 is the process flow diagram according to the measuring battery allowance method in the embodiments of the invention.
With reference to Fig. 3, CPU210 moves 1AD converter 220 and 2AD converter 230 in order to measure the surplus of battery 250, carries out reading of N second periodicity, and promptly figure goes up the process of S301.
At this moment, above-mentioned cycle and times N are along with external control signal changes.
In addition, the magnitude of voltage that utilizes CPU210 to read, carry out the S302 step, the mean value V of calculating voltage, here said average voltage level is the magnitude of voltage that the magnitude of voltage will be in the 1AD converter 220 measured deducts the resistance of measuring in the 2AD converter 230 240, then with all values addition, the mean value that obtains divided by N again.
In addition, also can utilize the calculating of other multiple mode values of averaging.
Whether on the other hand, CPU210 is in the S303 process, and average voltage level V that previous step is calculated and the interval 3.7-3.8V that sets in advance compare, see in this interval.Here the 3.7-3.8V interval of saying is as above-mentioned illustrated in figures 1 and 2, is according to the property settings of battery 250, because battery discharge curve difference, the little interval of corresponding tilt angle varied is also with difference.
When the average voltage level V that measures setting interval in the time, CPU210 will change the mode of measuring battery allowance.That is to say that CPU210 controls 1AD converter 220 and 2AD converter 230 reads once new data, see among the S305 that the numerical value deletion with reading at first in the numerical value utilizes the data that newly read among the S304 to come the mean value of calculating voltage.
As mentioned above, the method does not need 11D converter 220 and 2AD converter 230 to carry out reading for N time in the little interval of the tilt angle varied of above-mentioned discharge curve, it has only utilized up-to-date data that record and the previous data of measuring to carry out the calculating of average voltage, has reduced the execution number of times of CPU210 and the execution number of times of converter effectively.
As mentioned above, the method is carried out in the 3.7-3.8V interval, when CPU210 when voltage 3.1V is following, as shown in Figure 4, for protection system can be carried out closing motion.
Fig. 4 is according to above-mentioned Fig. 3, demonstration be the process flow diagram of system power supply closing motion.
With reference to Fig. 4, be the same with the S301 above-mentioned Fig. 3 to the process of S305 from the S401 step to the S405 step.
But when 3.7-3.8V was interval, then CPU210 was just by S401 and S402 step calculating voltage mean value as if average voltage level, if the magnitude of voltage of calculating is lower than 3.1V, as the S406 process, system will enter the S407 step automatically, carries out closing motion.
By the way, CPU210 can measure the voltage of battery 250 effectively, and has the function of protection system.
Below be described in detail for example,
According to existing technology, the highest 4.5V that is located at of the voltage of battery 250.When the discharge curve of battery as shown in Figure 1, at first CPU210 controls 1AD converter 220 and 2AD converter 230 reads magnitude of voltage 4 times, and calculates average voltage level.
At this moment, if when the value that obtains is 4V, CPU210 then proceeds periodic mensuration (4 times), measures the surplus of battery 250 by the mode of measuring mean value.
If when the average voltage level that draws after 4 reading of data was 3.75V, in the interval that this numerical value is formerly set, 1AD converter 220 and 2AD converter 230 no longer carried out reading for 4 times, and just once read.In 4 numerical value formerly measuring afterwards, delete the data that record at first, and utilize the calculating of up-to-date data value of averaging that records.
That is to say, if the average voltage level of battery 250 in the 3.7-3.8V interval, for example the data of surveying for 4 times are respectively 3.81V, 3.80V, 3.79V, 3.78V, 4 average voltage level are 3.795V just so.Because this value in the interval of setting, gets final product so only need to measure the primary voltage value later on.
If at this moment, the magnitude of voltage that records is 3.75V, and just the value 3.81V that records the earliest in 4 magnitudes of voltage with first before measurement deletes, and replaces with 3.75V, the mean value of calculating voltage again.
Carry out voltage determination according to said method, thereby measure the surplus of battery 250.If after, the mean value of calculating will carry out 4 times again and measure not in the 3.7-3.8V that sets, and comes calculating voltage mean value.
Foundation measuring battery allowance device and method of the present invention has the flash-over characteristic according to battery, the characteristic of the assay method that conversion is different.The those skilled in the art that can fully understand main idea of the present invention can carry out other various improvement or changes in ideological realms of the present invention.
Claims (7)
1. a measuring battery allowance device is characterized in that, comprising:
Voltage determination portion, it is measured the voltage of above-mentioned battery under the effect of control signal, that is, by above-mentioned voltage determination portion is controlled, make it carry out voltage determination N time, utilizes the mean value of N magnitude of voltage to measure battery allowance;
Control part, it is when in the voltage range that the mean value of above-mentioned N magnitude of voltage is being set, control above-mentioned voltage determination portion and carry out once new mensuration, after removing the magnitude of voltage addition of the outer remainder of measuring at first of value in magnitude of voltage that utilization records and previous N the magnitude of voltage of measuring, calculate the mean value of voltage again.
2. measuring battery allowance device as claimed in claim 1 is characterized in that:
The voltage range of above-mentioned setting is set according to external control signal.
3. a measuring battery allowance method is characterized in that, may further comprise the steps:
Earlier the voltage of battery is carried out the mensuration of N second periodicity, calculate the mean value of voltage, determine the step of battery allowance with this;
When in the voltage range that average voltage level that said determination goes out is being set, then carry out once new mensuration, after removing the magnitude of voltage addition of the outer remainder of measuring at first of value in magnitude of voltage that utilization records and previous N the magnitude of voltage of measuring, calculate the mean value of voltage again, carry out the step of measuring battery allowance with this.
4. measuring battery allowance method as claimed in claim 3 is characterized in that: the voltage determination cycle of above-mentioned battery is set according to the control signal of outside.
5. measuring battery allowance method as claimed in claim 3 is characterized in that: above-mentioned N is an integer, and the control signal of the basis of design outside of N is set.
6. measuring battery allowance method as claimed in claim 3 is characterized in that: the voltage range of above-mentioned setting is set according to the control signal of outside.
7. measuring battery allowance method as claimed in claim 3 is characterized in that: when the average voltage of said determination when critical value is following, system power supply will be closed automatically with the protection built-in system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100198915A CN101231327B (en) | 2007-01-25 | 2007-01-25 | Apparatus and method for measuring battery allowance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100198915A CN101231327B (en) | 2007-01-25 | 2007-01-25 | Apparatus and method for measuring battery allowance |
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| Publication Number | Publication Date |
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| CN101231327A CN101231327A (en) | 2008-07-30 |
| CN101231327B true CN101231327B (en) | 2011-03-30 |
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| CN2007100198915A Expired - Fee Related CN101231327B (en) | 2007-01-25 | 2007-01-25 | Apparatus and method for measuring battery allowance |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011036040A (en) * | 2009-07-31 | 2011-02-17 | Renesas Electronics Corp | System interconnection system and system interconnection method |
| CN102129037B (en) * | 2010-01-18 | 2014-10-22 | 光阳工业股份有限公司 | Residual power display system and residual power display method for electric vehicle |
| CN102298119B (en) * | 2011-05-24 | 2015-12-02 | 惠州Tcl移动通信有限公司 | Battery electric quantity display device and method |
| CN102520364B (en) * | 2011-12-20 | 2014-09-03 | 广东欧珀移动通信有限公司 | Method utilizing battery voltage to display electric quantity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5239286A (en) * | 1990-08-31 | 1993-08-24 | Fujitsu Limited | Battery alarm system |
| CN1084281A (en) * | 1992-09-14 | 1994-03-23 | M&C株式会社 | The inspection method of accumulator and device thereof |
| CN1196796A (en) * | 1996-04-29 | 1998-10-21 | 艾利森电话股份有限公司 | Battery capacity measuring device |
| CN1750688A (en) * | 2004-09-17 | 2006-03-22 | 乐金电子(中国)研究开发中心有限公司 | Method and device for displaying cell voltage margin of cell phone |
-
2007
- 2007-01-25 CN CN2007100198915A patent/CN101231327B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5239286A (en) * | 1990-08-31 | 1993-08-24 | Fujitsu Limited | Battery alarm system |
| CN1084281A (en) * | 1992-09-14 | 1994-03-23 | M&C株式会社 | The inspection method of accumulator and device thereof |
| CN1196796A (en) * | 1996-04-29 | 1998-10-21 | 艾利森电话股份有限公司 | Battery capacity measuring device |
| CN1750688A (en) * | 2004-09-17 | 2006-03-22 | 乐金电子(中国)研究开发中心有限公司 | Method and device for displaying cell voltage margin of cell phone |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-106504A 2005.04.21 |
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