CN105353318B - A kind of method of lead-acid accumulator on-line monitoring capacity - Google Patents
A kind of method of lead-acid accumulator on-line monitoring capacity Download PDFInfo
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Abstract
The present invention relates to a kind of methods of lead-acid accumulator on-line monitoring capacity, this method includes following steps: (1), using slope capacity algorithm: being by inputting discharge current, first time voltage, second point time voltage, temperature after calculating by slope capacity algorithm, exports residual capacity, actual capacity, volume percent；Need to preset first time, second point time, slope-compensation value for calculating end voltage, and estimates electric discharge total time t, then by discharge time and end voltage, simulates full capacity discharge calculation volume percent, actual capacity and residual capacity；(2), base station occur have a power failure after, if base station restores electricity within the second point time, and all cell voltages all > 1.8V, using default value-based algorithm.The invention has the following advantages that capableing of the capacity and health status of on-line measurement battery, guarantees that base station does not have a power failure and move back clothes.
Description
Technical field
The present invention relates to battery field, communication base station backup power monitors field, and specifically, it is related to a kind of plumbic acid storage
The method of battery on-line monitoring capacity.
Background technique
Communication base station in the power-off state, is needed by 48V lead-acid batteries (24 section, every section 2V) as backup power totally
System is powered, and in order to guarantee that power outage does not occur for communication base station and moves back clothes, needs to monitor on-line the appearance of lead-acid accumulator
Amount and health status.
Summary of the invention
The purpose of the present invention is overcoming deficiency in the prior art, a kind of side of lead-acid accumulator on-line monitoring capacity is provided
Method.
The purpose of the present invention is what is be achieved through the following technical solutions, the side of this lead-acid accumulator on-line monitoring capacity
Method, this method include following steps:
(1), using slope capacity algorithm: first time voltage of input, second point time voltage, temperature, discharge current
Four parameters after calculating by slope capacity algorithm, export residual capacity, actual capacity, volume percent.Algorithm system domestic demand
First time is preset, the second point time, these three parameters of slope-compensation value；It is pre- by four parameters inputted and inside
If three parameters modeled jointly to calculate end voltage, and estimate electric discharge total time t, in conjunction with discharge time and end voltage
Estimate out full capacity discharge calculation volume percent, actual capacity and residual capacity；
(2), communication base station occurs after having a power failure, if base station restores electricity within the second point time, and all cell voltages
All > 1.8V, using default value-based algorithm；If having certain cell voltage≤1.8V at that time, when recording corresponding to the batteries
Between, for calculating the section capacity, other 23 batteries using base station restore electricity before when inscribe 23 economize on electricity cell voltages, using pre-
If value-based algorithm；Wherein, default value-based algorithm includes following steps: discharge current I and each data scanning time t are first passed through,
Do contents of decrement accumulation calculating, i.e. C=C+I*t；Thus the capacity C of time loss is calculated, then will be in the C removal of this integral capacity
10 hours conversion ratio K obtain the contents of decrement value under 10 hour rates, i.e. Ck=C/K；The 25th batteries are virtually added again, it is corresponding
Default residual capacity is 0AH, as a point (X1, Y1)；Sort the highest section voltage found out in 24 economize on electricity cell voltages again
Umax, corresponding to default residual capacity is Cmax=500-Ck, does second point (X2, Y2), i.e., (Umax, Cmax)；By point
(X1, Y1) and point (X2, Y2) draw straight line equation as 2 point types, i.e. Yi=k (Xi-1.8), k are what two point form calculated
Straight slope, i=1 ... 24 can be used another 23 economize on electricity cell voltage as Xi, bringing equation into can be obtained 24 economize on electricity cell voltages pair
The default remaining capacity value answered, i.e. Yi；Default actual capacity and preset capacity percentage are calculated by default remaining capacity value again
Than；If minimum amount of voltage that can not be compared in any case or completion can not be compared in 10 minutes, 10 points are taken
The 24 groups of voltage values inscribed when clock are as 24 section voltage value of initial time.
In step (2), it is added to the time value t1 for recording certain battery arrival 1.8V, then do product with t1 and discharge current I
Divide calculation of capacity, i.e., cumulative C1=C1+I*t, t is sweep time, t < t1；Again divided by conversion ratio K, certain 10 hour rate of battery is obtained
Lower capacity C 1k=C1/K, C1k are exactly its actual capacity, residual capacity 0AH, then calculate capacity hundred by actual capacity
Divide ratio, constitutes full capacity algorithm.
The slope capacity algorithm includes end voltage algorithm and voltage capacity algorithm, specific as follows:
1) end voltage algorithm: lowest section battery cell reaches the 24 economize on electricity cell voltages inscribed when 1.8V, when by two
Between put the voltage value v1i and v2i of acquisition, i.e. point A and point B two o'clock, the slope of straight line y2 is first calculated with point A and point B, multiplied by
Slope-compensation value makes the slope of straight line y2 be equal to the slope of straight line y3, wherein being required according to Lagrange mean value theorem, it is known that y3
It is identical as y1 slope, then point slope form calculating is done by the slope of point A and y1, straight line y1 is calculated, to obtain in ordinate
The total time t of 1.8V, then calculate separately out every batteries 24 economize on electricity cell voltage at time t.
2) voltage capacity algorithm: this method is identical with full capacity algorithm, and virtual the 25th batteries that are added are changed to directly again
1.8V battery is found out in 24 batteries, the capacity of calculating is finally added into tc compensation, obtains remaining appearance to the end
Amount, actual capacity and volume percent.
(3), self diagnosis is handled: after calculating the second point time, every one minute, its primary full capacity value is calculated,
After full capacity value lowest section is less than above-mentioned slope capacity algorithm 5%, 2.8 are set by slope-compensation value, is then used again
Slope capacity algorithm calculates, and covers previous capability value；When full capacity value lowest section be less than above-mentioned slope capacity algorithm 10% it
Afterwards, 3.0 are set by slope-compensation value；After full capacity value lowest section is less than above-mentioned slope capacity algorithm 15%, by slope
Offset is set as 3.3.
The invention has the following advantages that capableing of the capacity and health status of on-line measurement lead-acid accumulator, give warning in advance base
Lead-acid batteries of standing capacity condition technically ensures hydro power generation intervention ahead of time before battery energy depletion, to guarantee
Communication base station does not occur power outage and moves back clothes.
Detailed description of the invention
Fig. 1 is the block diagram that value-based algorithm is preset in the present invention；
Fig. 2 is the schematic diagram that value-based algorithm is preset in the present invention；
Fig. 3 is the flow diagram that value-based algorithm is preset in the present invention；
Fig. 4 is the block diagram of full capacity algorithm in the present invention；
Fig. 5 is the flow diagram of full capacity algorithm in the present invention；
Fig. 6 is the block diagram of slope capacity algorithm in the present invention；
Fig. 7 is the schematic diagram of slope capacity algorithm in the present invention.
Fig. 8 is the flow diagram 1 of slope capacity algorithm in the present invention.
Fig. 9 is the flow diagram 2 of slope capacity algorithm in the present invention.
Specific embodiment
The present invention is described further below with reference to embodiment.
3.1 default value-based algorithms
When carrying out lead-acid accumulator on-line monitoring for the first time, needs to carry out first artificial electric discharge initial value is arranged, default
Discharge time 5 minutes (time is not fixed), discharge time can be configured for the first time.
3.1.1 algorithm block diagram (see Fig. 1)
3.1.2 algorithmic descriptions
A) overview
The algorithm inputs 24 section voltage value of initial time, discharge current, pre-arcing time.It is defeated by pre-seting Processing Algorithm
It is pre- out
If residual capacity, actual capacity, preset capacity percentage are preset.
B) definition statement
24 section voltage value of initial time: after electric discharge in 5 minutes (time is not fixed), 24 batteries voltage value at that time.
Discharge current: this when the discharge current inscribed.
The pre-arcing time: the time value (5 minutes) at the moment.
C) internal calculation
Referring to Fig.1, first pass through discharge current I and each data scanning time t (t=5s, actual scanning time interval by
Depending on hardware acquisition interval), do contents of decrement accumulation calculating, i.e. C=C+I*t.Thus the capacity C of time loss is calculated (i.e.
Integral capacity in Fig. 1, because fraction is cumulative and as Global integration), then this integral capacity C is removed upper 10 hours and is converted
Rate K (conversion ratio table sees attached list one), obtains the contents of decrement value under 10 hour rates, i.e. Ck=C/K.Section 25 is added virtual
Battery (voltage value 1.8V), corresponding default residual capacity is 0AH, and as a point (X1, Y1), i.e., (1.8,0) are (as schemed
Shown in 2).Sort the highest section voltage Umax found out in 24 economize on electricity cell voltages again, and corresponding to default residual capacity is Cmax=
500-Ck does second point (X2, Y2), i.e. (Umax, Cmax) (as shown in Figure 2).It regard point (X1, Y1) and point (X2, Y2) as 2
Point type draws straight line equation (such as Fig. 2), i.e. (k is the straight slope that two point form calculates, i=1 ... to Yi=k (Xi-1.8)
24) it, that is, can be used another 23 economize on electricity cell voltage as Xi, the corresponding default remaining appearance of 24 economize on electricity cell voltages can be obtained in band people's equation
Magnitude (i.e. Yi).Default actual capacity and preset capacity percentage are calculated by default remaining capacity value again.If certain
In the case of can not compare minimum amount of voltage that or completion can not be compared in 10 minutes, then 24 groups inscribed when taking 10 minutes
Voltage value is as 24 section voltage value of initial time.
3.1.3 core algorithm flow chart: (see Fig. 3).
3.2 full capacity algorithms
Base station occurs after having a power failure, if base station restores electricity within the second point time, therefore and can not be calculated using slope capacity
Method, and all cell voltages all > 1.8V, then calculated according to the algorithm of first part, and fictionalize Section 25 (1.8V)
To calculate.If having certain cell voltage≤1.8V at that time, the time corresponding to the batteries is recorded, is held for calculating the section
Amount, other 23 batteries using base station restore electricity before when inscribe 23 economize on electricity cell voltages, using first part's same procedure meter
It calculates.Note: full capacity algorithm is always through entire calculating process, includes first part's algorithm and Part III algorithm.
3.2.1 algorithm block diagram (see Fig. 4)
1) all cell voltages all > 1.8V
Referring to 3.1 content above and Fig. 1, inscribed when 24 section voltage value of initial time is changed to before interior base station restores electricity
24 section voltage values.
2) has certain cell voltage≤1.8V
3.2.2 algorithmic descriptions
1) all cell voltages all > 1.8V
Referring to the algorithmic descriptions in 3.1 parts.
2) has certain cell voltage≤1.8V
A) overview
The 23 section voltage value of algorithm end of input moment, discharge current, discharge time, certain battery reach the 1.8V moment when
Between.By pre-seting Processing Algorithm.Export residual capacity, actual capacity, volume percent.
B) definition statement
The time at certain battery arrival 1.8V moment: certain batteries reaches the time value t1 of 1.8V within the second time.
C) internal calculation
Referring to the internal calculation of first part, it is added to and records the time value t1 that certain battery reaches 1.8V, then with t1 and put
Electric current I does integral capacity calculating, i.e., cumulative C1=C1+I*t (t is sweep time, t < t1).Again divided by conversion ratio K, certain is obtained
Capacity C 1k=C1/K, C1k are exactly its actual capacity, residual capacity 0AH under 10 hour rate of battery.Pass through actual capacity again
Calculate volume percent.
3.2.3 core algorithm flow chart (see Fig. 5)
1) all cell voltages all > 1.8V
Referring to the algorithmic descriptions in 3.1 parts.
2) has certain cell voltage≤1.8V.
3.3 slope capacity algorithms
3.3.1 algorithm block diagram (see Fig. 6)
3.3.2 algorithmic descriptions
1) overview
The algorithm is by input discharge current, first time voltage, second point time voltage, and temperature passes through slope
After capacity algorithm calculates, residual capacity, actual capacity, volume percent can be exported.
Need to preset first time inside algorithm, the second point time, slope-compensation value terminates electricity for calculating
Pressure, and estimate electric discharge total time t.Again by discharge time and end voltage, full capacity discharge calculation volume percent is simulated,
Actual capacity and residual capacity.
2) definition statement
First time: first acquisition time of each electric current see the table below 3.1.
The second point time: the second point acquisition time of each electric current see the table below 3.1.
First time voltage: the 24 section voltage values under electric discharge, under first time.
Second point time voltage: the 24 section voltage values under electric discharge, under the second point time.
Slope-compensation: as shown in figure 5, the ratio of y1 and y2 slope.
3) internal calculation
The algorithm is broadly divided into 2 subdivisions, and such as figure 6 above is divided into end voltage algorithm and voltage capacity algorithm.
First part is end voltage algorithm, such as Fig. 7.I.e. lowest section battery cell reaches 24 economize on electricitys inscribed when 1.8V
Cell voltage.The calculating is the voltage value v1i and v2i by the acquisition of two time points, i.e. point A and point B two o'clock in Fig. 5, according to
Lagrange mean value theorem: it is identical as whole slope of curve to there will necessarily be a little its slope on smooth curve.First with point A and point B
The slope for calculating straight line y2, multiplied by slope-compensation value (table 3.1, as taken 2.365 when 30A (meeting the certain bending of appearance)),
The slope of straight line y2 is set to be equal to the slope of straight line y3.It is wherein required according to Lagrange mean value theorem, it is known that y3 and y1 slope phase
Together, then by the slope of point A and y1 point slope form calculating is done, calculates straight line y1, to obtain the total time in ordinate 1.8V
T, then calculate separately out every batteries 24 economize on electricity cell voltage at time t.
The second part is voltage capacity algorithm.This method is identical with the algorithm of front 3.2.2, as long as will be virtually added
25 batteries are changed to find out 1.8V battery in direct 24 batteries again.Finally by temperature coefficient with the capacity of calculating, obtain
Residual capacity to the end, actual capacity and volume percent.
| Current range (unit: A) | First time (unit: minute) | The second point time (unit: minute) | Slope-compensation value |
| 20-40 | 60 | 90 | 2.365 |
| 40-60 | 36 | 54 | 2.015 |
| 60-80 | 26 | 40 | 1.781 |
Table 3.1
3.3.3 self diagnosis
1., every one minute, calculating its primary full capacity value after calculating the second point time.When full capacity value is minimum
Section is less than after above-mentioned slope capacity algorithm 5%, sets 2.8 for slope-compensation value, then uses slope capacity algorithm meter again
It calculates, and covers previous capability value.After full capacity value lowest section is less than above-mentioned slope capacity algorithm 10%, by slope-compensation value
3.0. is set as after full capacity value lowest section is less than above-mentioned slope capacity algorithm 15%, sets 3.3 for slope-compensation value.
It see the table below 3.2
| Slope-compensation value | Capacity difference | Slope-compensation value | Capacity difference | Slope-compensation value | Capacity difference |
| 2.8 | 5% | 3.0 | 10% | 3.3 | 15% |
Table 3.2
2. repairing true slope after total discharge capacity is more than 500AH.It is shown in Table 3.3
| Current range (unit: A) | First time (unit: minute) | The second point time (unit: minute) | Slope-compensation value |
| 20-40 | 60 | 90 | 2.8 |
| 40-60 | 36 | 54 | 2.3 |
| 60-80 | 26 | 40 | 2.0 |
Table 3.3
3.3.4 core algorithm flow chart (see Fig. 8-Fig. 9)
Subordinate list one
Use scope of the present invention: 20A-80A discharge current, other current ranges are calculated directly as ratio under 125A.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (1)
1. a kind of method of lead-acid accumulator on-line monitoring capacity, it is characterised in that: this method includes following steps:
(1), using slope capacity algorithm: first time voltage of input, second point time voltage, temperature, discharge current four
Parameter after calculating by slope capacity algorithm, exports residual capacity, actual capacity, volume percent；It is needed in algorithm system pre-
First set first time, second point time, these three parameters of slope-compensation value；By four parameters inputting and internal preset
Three parameters model to calculate end voltage jointly, and estimate electric discharge total time t, estimate in conjunction with discharge time and end voltage
Full capacity discharge calculation volume percent, actual capacity and residual capacity out；
(2), communication base station occur have a power failure after, if base station restores electricity within the second point time, and all cell voltages all >
1.8V, using default value-based algorithm；If having certain economize on electricity cell voltage≤1.8V at that time, section voltage≤1.8V battery institute is recorded
The corresponding time, for calculating section voltage≤1.8V battery capacity, other 23 batteries restored electricity using base station before when
The 23 economize on electricity cell voltages inscribed, using default value-based algorithm；
Wherein, default value-based algorithm includes following steps: first passing through discharge current I and each data scanning time t, consumes
Capacity accumulation calculating, i.e. C=C+I*t；Thus the capacity C of time loss is calculated, then this integral capacity C is removed upper 10 hours
Conversion ratio K obtains the contents of decrement value under 10 hour rates, i.e. Ck=C/K；The 25th batteries are virtually added again, it is corresponding default surplus
Covolume amount is 0, as a point (X1, Y1)；Sort the highest section voltage Umax found out in 24 economize on electricity cell voltages again, right
It is Cmax=500-Ck that residual capacity, which should be preset, does second point (X2, Y2), i.e., (Umax, Cmax)；By point (X1, Y1) and point
(X2, Y2) draws straight line equation as 2 point types, i.e. Yi=k (Xi-1.8), k are the straight slope that two point form calculates, i
=1 ... 24, that is, it can be used another 23 economize on electricity cell voltage as Xi, it is corresponding default surplus that 24 economize on electricity cell voltages can be obtained in substitution equation
Covolume magnitude, i.e. Yi；Default actual capacity and preset capacity percentage are calculated by default remaining capacity value again；
If minimum amount of voltage that can not be compared in any case or completion can not be compared in 10 minutes, then 10 points are taken
The 24 groups of voltage values inscribed when clock are as 24 section voltage value of initial time；
Addition records certain battery and reaches the time value t1 of 1.8V, then does integral capacity calculating with t1 and discharge current I, i.e., cumulative C1
=C1+I*t, t are sweep time, t < t1；Again divided by conversion ratio K, capacity C 1k=C1/K, C1k under certain 10 hour rate of battery are obtained
It is exactly its actual capacity, residual capacity 0AH, then volume percent is calculated by actual capacity, constitute full capacity algorithm；
The slope capacity algorithm includes end voltage algorithm and voltage capacity algorithm:
1) end voltage algorithm, lowest section battery cell reach the 24 economize on electricity cell voltages inscribed when 1.8V, pass through two time points
The voltage value v1i and v2i of acquisition, i.e. point A and point B two o'clock first calculate the slope of straight line y2, multiplied by slope with point A and point B
Offset makes the slope of straight line y2 be equal to the slope of straight line y3, wherein being required according to Lagrange mean value theorem, it is known that y3 and y1
Slope is identical, then does point slope form calculating by the slope of point A and y1, calculates straight line y1, to obtain ordinate 1.8V's
Total time t, then calculate separately out every batteries 24 economize on electricity cell voltage at time t；
2) voltage capacity algorithm, this method is identical with full capacity algorithm, and virtual the 25th batteries that are added are changed to directly in 24 sections
1.8V battery is found out in battery, the capacity of calculating is finally multiplied by temperature coefficient, obtains residual capacity to the end, it is practical to hold
Amount and volume percent；
Self diagnosis processing: after calculating the second point time, every one minute, its primary full capacity value is calculated, full capacity is worked as
It is worth lowest section to be less than after above-mentioned slope capacity algorithm 5%, sets 2.8 for slope-compensation value, then uses slope capacity again
Algorithm calculates, and covers previous capability value；After full capacity value lowest section is less than above-mentioned slope capacity algorithm 10%, by slope
Offset is set as 3.0；After full capacity value lowest section is less than above-mentioned slope capacity algorithm 15%, slope-compensation value is arranged
It is 3.3.
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