CN102636754A - Method and system for estimating residual quantity of electric quantity of battery - Google Patents
Method and system for estimating residual quantity of electric quantity of battery Download PDFInfo
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Abstract
The invention relates to a method and a system for estimating the residual quantity of battery electricity, which mainly obtain the initial voltage value and the discharge time of a battery to be measured, firstly obtain the electric capacity of the battery, then introduce different discharge currents into a polynomial addition current equation to obtain the addition current value of the battery to be measured, and finally calculate the residual quantity of the battery electricity by the electric capacity and the addition current value.
Description
Technical field
The invention relates to the residual amount of a kind of battery electric quantity and estimate correlation technique, refer to residual amount predictor method of a kind of battery electric quantity and system thereof especially.
Background technology
Because the crisis that is just exhausting in the face of oil in the whole world, causing many is that the device of power source must seek to use other motive force substitute source with the oil.
With vehicle, it is the vehicle power source that the extremely long-pending invariably thinking of each depot replaces oil with electric power, and transition period, part depot was more released oily electric hybrid vehicle money at present, used oil mass to reduce vehicle.In addition, directly release electric motor car especially, change fully that to adopt electric power be power source like the locomotive industry.For in response to this ripple trend, the following battery use amount and the output value will improve day by day, and how effectively managing, keep in repair, overhaul battery will be following considerable problem.
The maintainer is in maintenance battery program; The residual amount of battery electric quantity is considerable basis for estimation; Yet judge that at present the residual amount accuracy rate of battery electric quantity is not high, studying carefully its main cause is that present residual amount predictor method is directly to change with different discharge currents and corresponding voltage thereof to carry out the calculating of the residual amount of battery electric quantity; Yet it is as shown in Figure 4; The pairing voltage dip of discharge current maximum in the different discharge currents is very fast, because the corresponding voltage curve slope difference of each discharge current, and can cause the residual amount error amount of the battery electric quantity of estimating out to become big relatively.
In addition, realize the equipment of the residual amount predictor method of above-mentioned battery electric quantity at present, as shown in Figure 5; Be to include an external voltage current sensing means 51 and a supervisory control comuter 52; During use, this external voltage current sensing means 51 to be typically wire connected to the electrode of mesuring battary 50, is cooperated the control of supervisory control comuter 52; Mesuring battary 50 is carried out the control of discharge current size; And detect the change in voltage of each section discharge current time according to this, and give record by this supervisory control comuter 52 again, be made for the calculating of the residual amount discreet value of battery electric quantity of rear end.
Can know by above-mentioned explanation; At present the residual amount of preestimating battery electric weight on operation of equipment still must with the mode of connection of complicacy with mesuring battary respectively with the external voltage current sensing means; Quite inconvenience and time-consuming in the use, the application that is unfavorable for overhauling a large amount of batteries must be sought better solution.
Summary of the invention
The techno-absence of mirror residual amount predictor method of above-mentioned current battery electric weight and equipment thereof is arranged, and fundamental purpose of the present invention provides the residual amount predictor method of a kind of battery electric quantity, and the residual amount of preestimating battery electric weight improves battery maintenance quality more accurately.
Desiring to reach the employed major technique of above-mentioned purpose makes the residual amount predictor method of this battery electric quantity comprise:
Obtain and store the full piezoelectric voltage value of mesuring battary and do not have the piezoelectric voltage value;
Mesuring battary is carried out charging procedure;
Measure the starting potential value of mesuring battary;
Mesuring battary is carried out discharge procedures, make battery export different discharge currents, and record the interval voltage change of discharge time, several discharge current values and each discharge current;
The counting cell electric capacity, according to the starting potential value and discharge time the counting cell electric capacity;
Calculate the addition current value, select a polynomial expression addition current equation formula, discharge current value is brought this polynomial expression addition current equation formula into for several times, to calculate the addition current value; And the residual amount of estimating battery electric weight, calculate the residual amount of battery electric quantity with electric capacity and addition current value.
This mesuring battary is carried out in the charging procedure step this mesuring battary being carried out constant-current charge, when waiting to reach the battery charging voltage value, change and adopt constant-voltage charge, till the voltage of battery arrives full piezoelectric voltage value.
In the starting potential value step that measures this mesuring battary, a load is connected to this battery electrode; Carry out the fixed load discharge; Select the resistance of parallelly connected different resistance values again between this load and this battery electrode again; Make this battery with different constant-current discharges, till no piezoelectric voltage value is somebody's turn to do in the voltage arrival of this battery.
Further store several starting potential equations; Each starting potential equation is by several starting potential values and revise the back electric capacity and push away; Wherein each revises the back electric capacity to revise back electric capacity calculating formula calculating and to get, and is the standard electric capacity that multiply by this mesuring battary discharge time again divided by the standard of this mesuring battary this discharge time and revise back electric capacity calculating formula.
Starting potential value according to this mesuring battary in the aforementioned calculation battery capacity step is judged corresponding starting potential equation; Bring this starting potential value, discharge time, standard discharge time and revised electric capacity into corresponding starting potential equation again, calculate the electric capacity of current battery.
In the aforementioned calculation addition current value step, this polynomial expression addition current equation formula is quadravalence equation a: y=-0.68x
4+ 3.588x
3-5.954x
2+ 5.898x-0.952, wherein y is this addition current value, x is this discharge current value.
Above-mentioned this method mainly obtains mesuring battary starting potential value and discharge time, tries to achieve the electric capacity of battery earlier, brings different discharge currents into polynomial expression addition current equation formula again, tries to achieve the addition current value of this mesuring battary; Calculate the residual amount of battery electric quantity with electric capacity and addition current value more at last, can accurately estimate the residual amount of this mesuring battary electric weight.
Desiring to reach the employed major technique of above-mentioned purpose includes:
One battery is provided with at least one battery, an embedded electric current and voltage detection module and a radio receiving transmitting module in it; Wherein this embedded electric current and voltage detection module is to be connected between the battery module and radio receiving transmitting module that this at least one battery forms; In order to detect battery starting potential value and discharge current value, see through this radio receiving transmitting module again and convert starting potential value and discharge current value into wireless signal and externally transmit;
One discharge examination resistance device; Be connected to the electric current and voltage detection module output terminal and the battery electrode of this battery; And include one drive circuit unit, an on-off circuit and several resistance; Wherein this drive circuit unit is connected to electric current and voltage detection module output terminal, is electrically connected with the battery electrode formation to see through on-off circuit control specific electrical resistance, to produce the different discharge currents that detect usefulness;
One wireless monitor computing machine; Wireless transmitter wireless link with this battery; To receive the starting potential value and the discharge current value of this battery; This wireless monitor computing machine sends sense command to this battery again, and this embedded electric current and voltage detection module switches different resistance values resistance according to sense command and is connected with battery electrode, to obtain different discharge current values; This wireless monitor computing machine is preset with the full piezoelectric voltage value of various batteries, no piezoelectric voltage value and polynomial expression addition current equation formula again; And
One power supply unit is connected to this battery electrode and wireless monitor computing machine, exports charging voltage to this battery electrode with the control that receives this wireless monitor computing machine.
This wireless monitor computing machine further stores standard discharge time, standard capacitance value, full piezoelectric voltage value, no piezoelectric voltage value and each battery of the various batteries electric capacity calculation equation in different starting potential values.
Each starting potential equation is by plural starting potential value and revise the back electric capacity and push away; Electric capacity was to calculate and get to revise back electric capacity calculating formula after wherein each was revised, and was the standard electric capacity that multiply by battery discharge time divided by the standard of battery discharge time again to be measured and revise back electric capacity calculating formula.
Starting potential value according to battery in the aforementioned calculation battery capacity step is judged corresponding starting potential equation; Again that starting potential value, discharge time, standard discharge time and revised electric capacity substitution is corresponding starting potential equation; Calculate the electric capacity of current battery, and this polynomial expression addition current equation formula is quadravalence equation a: y=-0.68x
4+ 3.588x
3-5.954x
2+ 5.898x-0.952, wherein y is the addition current value, x is this discharge current value.
Useful technique effect of the present invention is: this wireless monitor computing machine of above-mentioned native system can store the residual amount of battery electric quantity of normal data and each detection battery of different batteries; The residual measurement amount of complete construction battery electric quantity, numerical value are collected and are analyzed, and provide the user to understand remaining capacity information more fast; In addition, because native system stores the normal data of various computing machine, when the residual amount of battery electric quantity is estimated, adopt with money battery standard data, it is more accurate to make the residual amount of battery electric quantity estimate.
Description of drawings
Fig. 1: the process flow diagram of the residual amount predictor method of battery electric quantity of the present invention.
Fig. 2 A to Fig. 2 C: the present invention's first to the 3rd starting potential is interval estimates the electric capacity curve map.
Fig. 3: the system architecture diagram of the residual amount Prediction System of battery electric quantity of the present invention.
Fig. 4: battery operating time curve map under the existing different discharge currents.
Fig. 5: the system architecture diagram of the residual amount Prediction System of existing battery electric quantity.
[primary clustering symbol description]
10 batteries, 11 battery
12 embedded electric current and voltage detection module 13 radio receiving transmitting modules
20 wireless monitor computing machines, 21 power supply units
30 discharge examination resistance devices, 31 drive circuit units
32 on-off circuits, 33 resistance
50 mesuring battaries, 51 batteries
52 voltage and current detecting devices, 53 supervisory control comuters
Embodiment
See also shown in Figure 1ly, be the process flow diagram of the residual amount predictor method of battery electric quantity of the present invention, it comprises following steps.
Obtain and store the full piezoelectric voltage value of mesuring battary and do not have piezoelectric voltage value 30;
Mesuring battary is carried out charging procedure 31; In present embodiment, decide electric current to battery charge with power supply unit output, when waiting to reach the battery charging voltage value, change and adopt constant-voltage charge, till the voltage of battery arrives full piezoelectric voltage value;
Measure the starting potential value 32 of mesuring battary; When this step removes the external charging power supply because of battery; May be because of its inner chemical reaction, access times or workmanship, its voltage will descend slightly, for instance; After battery charge to full voltage is 4.1V; Remove charge power supply, battery terminal voltage possibly drop to 3.9-4.0 not to be waited, and hereat this step is for revising the error that actual conditions possibly caused when estimating;
Mesuring battary is carried out discharge procedures 33; In present embodiment; One load is connected to battery electrode, carries out the fixed load discharge, see through a switching switch again between load and battery electrode again and select to be connected in parallel with the resistance of different resistance values; Make battery with different constant-current discharges 331, till cell voltage arrives no piezoelectric voltage value 332; Therefore in this step, can record total discharge time, the interval voltage change 333 of each discharge current;
Counting cell electric capacity 34 is brought corresponding starting potential equation into starting potential value, discharge time, standard discharge time and revised electric capacity, calculates the electric capacity of current battery;
Calculate addition current value 35, select a polynomial expression addition current equation formula, discharge current value is brought this polynomial expression addition current equation formula into for several times, to calculate the addition current value; In present embodiment, this polynomial expression addition current equation formula is quadravalence equation a: y=-0.68x
4+ 3.588x
3-5.954x
2+ 5.898x-0.952, wherein y is the addition current value, x is a discharge current value; And
The residual amount 36 of estimating battery electric weight calculates the residual amount of battery electric quantity with electric capacity and addition current value.
In the step of aforementioned calculation battery capacity,,, carry out the calculating of electric capacity and can be applicable to non-full electric battery so adopt the improvement coulometry to cooperate the open-circuit voltage method to carry out the calculating of calculating parameter value in order to try to achieve electric capacity more accurately.At first as shown in the table, obtain battery with mesuring battary same model and processing procedure at measured reference data of different starting potential values (starting potential and discharge time) and normal data (standard discharge time and standard electric capacity).Because obtained the starting potential and the discharge time of mesuring battary,, try to achieve this correction back capacitance so after reading this mesuring battary standard discharge time and standard electric capacity, can bring into and revise back electric capacity calculating formula; Wherein, to be discharge time multiply by the standard electric capacity discharge time divided by standard to this correction back electric capacity calculating formula again; So repeat electric capacity after different starting potentials calculate corresponding correction, can obtain following table.
By the data of showing on above-mentioned to try to achieve; Promptly can several starting potential values and revise the back electric capacity push away the equation of a prediction electric capacity; Shown in Fig. 2 A, be the prediction electric capacity curve map of the first initial voltage range (12.04V to 12.51V), prediction electric capacity equation is y=844.2x
2-18206x+97304; Shown in Fig. 2 B, the prediction electric capacity curve map of second starting potential interval (12.51V to 12.54V) predicts that the electric capacity equation is y=23262x+28931 for another example; As for Fig. 2 C, then represent the prediction electric capacity curve map of the 3rd starting potential interval (12.54V to 12.64V), its prediction electric capacity equation is y=5981x+72672.
Therefore; In the counting cell electric capacity step of the residual amount predictor method of battery electric quantity of the present invention; It is interval to find out corresponding starting potential according to the starting potential value of mesuring battary; Bring the starting potential value that records into this starting potential interval prediction electric capacity equation again, in the hope of the accurate electric capacity of this mesuring battary.
Above-mentioned this method mainly obtains mesuring battary starting potential value and discharge time, tries to achieve the electric capacity of battery earlier, again with different discharge current substitution polynomial expression addition current equation formulas, tries to achieve the addition current value of this mesuring battary; Calculate the residual amount of battery electric quantity with electric capacity and addition current value more at last, can accurately estimate the residual amount of this mesuring battary electric weight.
See also shown in Figure 3ly, for the present invention realizes the system architecture diagram of the residual amount predictor method of above-mentioned battery electric quantity, it includes:
One battery 10 is provided with at least one battery 11, one an embedded electric current and voltage detection module 12 and a radio receiving transmitting module 13 in it; Wherein this embedded electric current and voltage detection module 12 is connected between these at least one battery 11 composition battery 10 electrodes and the radio receiving transmitting module 13; In order to detect battery starting potential value and discharge current value, see through this radio receiving transmitting module 13 again and convert starting potential value and discharge current value into wireless signal and externally transmit;
One discharge examination resistance device 30; Be electrically connected to electric current and voltage detection module 12 output terminals and battery 10 electrodes of this battery 10; And include one drive circuit unit 31, an on-off circuit 32 and several resistance 33; Wherein this drive circuit unit 31 is connected to electric current and voltage detection module 12 output terminals, is electrically connected to constitute with battery 10 electrodes through on-off circuit 32 control specific electrical resistance 33, to produce the different discharge currents that detect usefulness;
One wireless monitor computing machine 20; Wireless transmitter 13 wireless link with this battery 10; To receive the starting potential value and the discharge current value of this battery 10; This wireless monitor computing machine 20 sends sense command to this battery 10 again, and this embedded electric current and voltage detection module 12 is connected with battery 10 electrodes according to the different resistance values resistance that the sense command switch discharges detects resistance device 11, to obtain different discharge current values; This wireless monitor computing machine 20 is preset with standard discharge time, standard capacitance value, full piezoelectric voltage value, the no piezoelectric voltage value of various batteries again, reaches the electric capacity calculation equation of each battery in different starting potential values, and polynomial expression addition current equation formula; And
One power supply unit 21 is connected to this battery 10 electrodes and wireless monitor computing machine 20, exports charging voltage to these battery 10 electrodes with the control that receives this wireless monitor computing machine 20.
Can know by above-mentioned explanation; The wireless monitor computing machine stores the standard discharge time, standard capacitance value, each battery of the mesuring battary electric capacity calculation equation in different starting potential values in advance, and polynomial expression addition current equation formula, and in carrying out residual amount when estimating; Charging current to the mesuring battary electrode of electric current is decided in control power supply unit output earlier; After full piezoelectric voltage value, change to decide voltage system, send the discharge order afterwards, when the embedded electric current and voltage detection module in the battery is obtained this discharge order through radio receiving transmitting module after to this battery to battery charge to be measured near it; Promptly measure the voltage of current battery electrode; As the starting potential value, and see through this radio receiving transmitting module and be back to this wireless monitor computing machine, then switching different resistance again is connected in parallel to this battery electrode; Make battery with different constant-current discharges, and discharge current value is back to this wireless monitor computing machine through this radio receiving transmitting module equally; Be with, obtain starting potential value and different charging current value when this wireless monitor computing machine, can calculate the electric capacity size and the addition current value of mesuring battary respectively, calculate the residual amount of battery electric quantity according to electric capacity and addition galvanometer again.
In sum; This wireless monitor computing machine of native system can store the residual amount of battery electric quantity of normal data and each detection battery of different batteries; The residual measurement amount of complete construction battery electric quantity, numerical value are collected and are analyzed, and provide the user to understand remaining capacity information more fast.In addition, just because native system is the normal data that stores the various computing machine, when the residual amount of battery electric quantity is estimated, adopt with money battery standard data, it is more accurate to make the residual amount of battery electric quantity estimate.
The above; Be merely preferred embodiment of the present invention; When can not limiting the scope that the present invention implements,, all should still belong in the scope that patent of the present invention contains so all simple equivalent of being done according to claim of the present invention and description of the invention content change and modification with this.
Claims (10)
1. residual amount predictor method of battery electric quantity is characterized in that including:
Obtain and store the full piezoelectric voltage value of a mesuring battary and do not have the piezoelectric voltage value;
This mesuring battary is carried out charging procedure;
Measure the starting potential value of this mesuring battary;
This mesuring battary is carried out discharge procedures, make battery export different discharge currents, and record the interval voltage change of discharge time, several discharge current values and each discharge current;
The counting cell electric capacity, according to the starting potential value and discharge time the counting cell electric capacity;
Calculate the addition current value, select a polynomial expression addition current equation formula, discharge current value is brought this polynomial expression addition current equation formula into for several times, calculates the addition current value; And
The residual amount of estimating battery electric weight calculates the residual amount of battery electric quantity with this battery capacity and this addition current value.
2. the residual amount predictor method of battery electric quantity according to claim 1; It is characterized in that: this mesuring battary is carried out in the charging procedure step; This mesuring battary is carried out constant-current charge; When waiting to reach the battery charging voltage value, change and adopt constant-voltage charge, till the voltage of battery arrives full piezoelectric voltage value.
3. the residual amount predictor method of battery electric quantity according to claim 2; It is characterized in that: measure in the starting potential value step of this mesuring battary a load is connected to this battery electrode; Carry out the fixed load discharge; Select the resistance of parallelly connected different resistance values again between this load and this battery electrode again, make this battery with different constant-current discharges, up to the voltage of this battery arrive should no piezoelectric voltage value till.
4. the residual amount predictor method of battery electric quantity according to claim 3; It is characterized in that: further store several starting potential equations; Each starting potential equation is by several starting potential values and revise the back electric capacity and push away; Wherein each revises the back electric capacity to revise back electric capacity calculating formula calculating and to get, and is the standard electric capacity that multiply by this mesuring battary discharge time again divided by the standard of this mesuring battary this discharge time and revise back electric capacity calculating formula.
5. the residual amount predictor method of battery electric quantity according to claim 4; It is characterized in that: the starting potential value according to this mesuring battary in the aforementioned calculation battery capacity step is judged corresponding starting potential equation; Bring this starting potential value, discharge time, standard discharge time and revised electric capacity into corresponding starting potential equation again, calculate the electric capacity of current battery.
6. the residual amount predictor method of battery electric quantity according to claim 5 is characterized in that: in the aforementioned calculation addition current value step, this polynomial expression addition current equation formula is quadravalence equation a: y=-0.68x
4+ 3.588x
3-5.954x
2+ 5.898x-0.952, wherein y is this addition current value, x is this discharge current value.
7. residual amount Prediction System of battery electric quantity is characterized in that including:
A battery is provided with at least one battery, an embedded electric current and voltage detection module and a radio receiving transmitting module in it; Wherein this embedded electric current and voltage detection module is connected between the battery module and radio receiving transmitting module that this at least one battery forms; In order to detect the starting potential value and the discharge current value of this battery, convert this starting potential value and discharge current value into the wireless signal signal through this radio receiving transmitting module again and externally transmit;
A discharge examination resistance device; Be electrically connected to output terminal and this battery electrode of the embedded electric current and voltage detection module of this battery; And include a drive circuit unit, an on-off circuit and several resistance; Wherein this drive circuit unit is connected to electric current and voltage detection module output terminal, is electrically connected to constitute with battery electrode through on-off circuit control specific electrical resistance, to produce the different discharge currents that detect usefulness;
A wireless monitor computing machine; Wireless transmitter wireless link with this battery; To receive the starting potential value and the discharge current value of this battery; This wireless monitor computing machine sends sense command to this battery again, and this embedded electric current and voltage detection module is connected with battery electrode according to the different resistance values resistance that the sense command switch discharges detects resistance device, to obtain different discharge current values; This wireless monitor computing machine is preset with the full piezoelectric voltage value of various batteries, no piezoelectric voltage value and polynomial expression addition current equation formula again; And
A power supply unit is connected to this battery electrode and wireless monitor computing machine, exports charging voltage to this battery electrode with the control that receives this wireless monitor computing machine.
8. the residual amount Prediction System of battery electric quantity according to claim 7 is characterized in that: this wireless monitor computing machine further stores standard discharge time, standard capacitance value, full piezoelectric voltage value, no piezoelectric voltage value and each battery of the various batteries electric capacity calculation equation in different starting potential values.
9. the residual amount Prediction System of battery electric quantity according to claim 7; It is characterized in that: each starting potential equation is by number starting potential values and revise the back electric capacity and push away; Electric capacity was to calculate and get to revise back electric capacity calculating formula after wherein each was revised, and was the standard electric capacity that multiply by battery discharge time divided by the standard of battery discharge time again to be measured and revise back electric capacity calculating formula.
10. the residual amount Prediction System of battery electric quantity according to claim 9; It is characterized in that: the starting potential value according to battery in the aforementioned calculation battery capacity is judged corresponding starting potential equation; Again that starting potential value, discharge time, standard discharge time and revised electric capacity substitution is corresponding starting potential equation; Calculate the electric capacity of current battery, and this polynomial expression addition current equation formula is quadravalence equation a: y=-0.68x
4+ 3.588x
3-5.954x
2+ 5.898x-0.952, wherein y is the addition current value, x is this discharge current value.
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| CN103675689A (en) * | 2012-09-24 | 2014-03-26 | 联想(北京)有限公司 | Battery detection method and device |
| CN105548907A (en) * | 2016-01-15 | 2016-05-04 | 北京交通大学 | New energy vehicle data recording method based on battery management system |
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| CN114441976A (en) * | 2020-11-04 | 2022-05-06 | 中移物联网有限公司 | Battery capacity detection device and method and computer readable storage medium |
| CN114441976B (en) * | 2020-11-04 | 2024-09-06 | 中移物联网有限公司 | Battery power detection device, method and computer readable storage medium |
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