CN106772077A - A kind of accumulator failure detection method - Google Patents
A kind of accumulator failure detection method Download PDFInfo
- Publication number
- CN106772077A CN106772077A CN201611144574.1A CN201611144574A CN106772077A CN 106772077 A CN106772077 A CN 106772077A CN 201611144574 A CN201611144574 A CN 201611144574A CN 106772077 A CN106772077 A CN 106772077A
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- China
- Prior art keywords
- cell batteries
- voltage
- batteries
- value
- detection method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
Abstract
The invention discloses a kind of accumulator failure detection method, comprise the following steps：（1）The voltage of each cell batteries in collection batteries, and adjust the voltage of each cell batteries；（2）Differential mode voltage to each cell batteries carries out attenuation processing, and voltage signal after decay is converted into data signal；（3）The characteristic value of each cell batteries is calculated according to data signal, each characteristic value is compared with default threshold value, if fiducial value is more than threshold value, then judge that the cell batteries are fail battery, alarm is sent, if fiducial value is less than threshold value, judges that the cell batteries are fault-free.The present invention can carry out the passive detection of DC voltage and temperature to it when batteries are to workload regular picture, can quick online detection have in batteries each cell batteries and whether there is failure, the batteries of working condition will not be impacted.
Description
Technical field
The present invention relates to battery condition detection technical field, a kind of accumulator failure detection method is related in particular to,
Be mainly used in online to batteries in each cell batteries carry out fault detect.
Background technology
In general, during the failure of detection wind-driven generator pitching motor standby lead-acid accumulator, it usually needs stop fortune
Sector-style power generator, after operating personnel's carrying accumulator internal resistance detector climbs up fan engine room, into wheel hub storehouse, opens electric power storage
Pond case lid, manual inspection accumulator internal resistance successively, then battery status is judged by control cell internal resistance.But this detection method
Detection poor in timeliness, and the consequences such as fan parking can be caused.
In order to solve the above-mentioned technical problem, following technology is proposed in the prior art：
Chinese patent notification number for " CN103135063A " prior art in disclose a kind of lead acid storage battery on June 5th, 2013
The detection in pond and monitoring method, electric current, voltage when each to battery by the voltage-current sensor electric discharge of the patent enter
Row detection, the current internal resistance RX and discharge time TX of battery are calculated using the controller of photovoltaic system；And with set
Internal resistance value R compares, and is detected when wait battery to discharge if RX≤R next time；If RX>R, then with the discharge time for setting
T-phase compares, if TX>T, then illustrate battery condition well without changing, if TX<T, then illustrating that battery loss is serious needs more
Change.This kind of detection method can be with on-line checking, without battery is pulled down.But there is not jamproof shortcoming, it is impossible to be used for
The fault detect of wind-driven generator machine standby lead-acid accumulator.In addition, this kind of method is when accumulator internal resistance is measured, measuring instrument
First by millivolt level high frequency electrocardiography battery, corresponding high frequency electric is then measured again, due to injecting voltage signal, detection
Current signal is all very faint, and normal work is difficult in the serious environment of outside electromagnetic interference, causes to be difficult to accurately to be examined
Result is surveyed, and such equipment price is expensive.
The content of the invention
It is an object of the invention to solve the above-mentioned problems in the prior art, there is provided a kind of accumulator failure detection side
Method, the present invention can carry out the passive detection of DC voltage and temperature to it when batteries are to workload regular picture, can
Quick detection has each cell batteries in batteries and whether there is failure, and will not the batteries of working condition be caused with punching
Hit.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of accumulator failure detection method, it is characterised in that comprise the following steps：
（1）The voltage of each cell batteries in collection batteries, and adjust the voltage of each cell batteries；Described adjustment is
Refer to the common-mode voltage for deducting each cell batteries, obtain the differential mode voltage of each cell batteries；
（2）Differential mode voltage to each cell batteries carries out attenuation processing, and voltage signal after decay is converted into data signal
Output；
（3）The characteristic value of each cell batteries is calculated according to data signal, each characteristic value is compared with default threshold value,
If fiducial value is more than threshold value, judge that the cell batteries are fail battery, send alarm, if fiducial value is less than threshold value, sentence
The fixed cell batteries are fault-free.
The step（1）In gathered by voltage regulator module and adjust the voltage of each cell batteries, the voltage is adjusted
Mould preparation block includes multiple sub- adjusting modules being connected in series, many sub- adjusting modules respectively with batteries in each monomer electric power storage
Pond connects.
The step（2）In attenuation processing is carried out by voltage attenuation module, the voltage attenuation module includes multiple string
Join the sub- attenuation module of connection, many sub- attenuation modules are connected with many sub- adjusting modules respectively.
The step（2）In attenuation processing is carried out to the differential mode voltage of each cell batteries after, obtain plurality of voltages signal,
Plurality of voltages signal is converted into data signal successively and is exported.
The step（3）In threshold value include upper limit threshold and lower threshold, when characteristic value be more than upper limit threshold when, judge
The cell batteries are fail battery；When characteristic value is less than lower threshold, judge that the cell batteries are fault-free；Work as feature
Value is located at when between upper limit threshold values and lower threshold, and the cell batteries are given a warning.
Using the advantage of the invention is that：
1st, the present invention can carry out the passive of DC voltage and temperature to it online when batteries are to workload regular picture
Detection, can quick detection have in batteries each cell batteries and whether there is failure, will not be to the batteries of working condition
Impact.
2nd, the present invention realize cell voltage patrol and examine, temperature survey, fault detect three zones integration.
3rd, the present invention can simultaneously to batteries in all cell batteries detect, it is efficient and convenient.
4th, the detection through China Testing Technology Institute of the invention, better than setting that the AC impedence method of Japan's production is produced
It is standby.
5th, the voltage signal of each cell batteries is input into multiplexing module, the output impedance pole of each road signal in the present invention
Low, amplitude change is little, the sampling of ADC modular converters after multy-way switching, and energy holding circuit is stablized quickly, can finally reach
The 1mS times complete to scan the scanning of plurality of voltages signal.
6th, product cost of the present invention is low, is the 1/2 of direct-current discharge method product, is AC signal injection measurement impedance method product
2/3.Also, product appearance of the present invention is a rectangle box body, its length is 200-250mm, and its width is 120mm, and it is high
It is 50mm to spend, with small volume, the advantages of certainty of measurement is high.And due to battery case narrow space in hub of wind power generator, electricity
Magnetic disturbance is big, and existing direct-current discharge method small product size is big, it is impossible to load；And existing AC impedence method product cannot normal work
Make, therefore, product only of the present invention can be used.
Brief description of the drawings
Fig. 1 is structured flowchart of the invention.
Specific embodiment
A kind of accumulator failure detection method, comprises the following steps：
（1）The voltage of each cell batteries in collection batteries, and adjust the voltage of each cell batteries；Described adjustment is
Refer to the common-mode voltage for deducting each cell batteries, obtain the differential mode voltage of each cell batteries.
In this step, the voltage of each cell batteries is gathered and adjusted by voltage regulator module, the voltage adjusts mould
Block includes multiple sub- adjusting modules being connected in series, and many sub- adjusting modules connect with each cell batteries in batteries respectively
Connect.
In this step, the adjustment refers to the common-mode voltage for deducting each cell batteries in batteries, and exports each
The differential mode voltage of cell batteries.For example, by taking Section 12 cell batteries in batteries as an example, the section cell batteries are positive and negative
Relative voltage between pole is 12V, but the series voltage of the 1st ~ 11 section is 12*11=132V.Therefore the cathode voltage of Section 12 battery
It is 132V, the cathode voltage is common-mode voltage；Cathode voltage is 144V, and the effect of voltage regulator module is exactly only to export Section 12
The differential mode voltage of battery positive and negative electrode voltage：Vout = V(+) - V(-) = 144 - 132 = 12V.
（2）Differential mode voltage to each cell batteries carries out attenuation processing, and plurality of voltages signal is obtained after attenuation processing, will
Plurality of voltages signal after decay is converted into data signal and exports successively.
In this step, attenuation processing is carried out by voltage attenuation module, after multiplexing module is by attenuation processing
Voltage signal is sequentially output, and the voltage signal for being exported multiplexing module by ADC modular converters is converted into digital letter successively
Number.Specially：First the first via voltage signal in plurality of voltages signal is exported by multiplexing module, is changed by ADC
The road voltage signal is converted into data signal and exported by module.The rest may be inferred, and the conversion for being sequentially completed residual voltage signal is defeated
Go out.
In this step, the highest charging electricity of voltage attenuation ratio=ADC modular converters maximum input voltage/cell batteries
Pressure, the voltage signal of each cell batteries after decay send multiplexing module.
In this step, the voltage attenuation module includes multiple sub- attenuation modules being connected in series, many sub- attenuation modules
It is connected with many sub- adjusting modules respectively, quantity and each cell batteries in batteries of sub- adjusting module and sub- attenuation module
Quantity it is identical, and three be one-to-one relationship.
（3）According to step（2）The multiple data signals for obtaining calculate the characteristic value of each cell batteries（Calculate characteristic value
Prior art of the method referring to Patent No. 201010198298.3 in）, each characteristic value is compared with default threshold value, if
Fiducial value is more than threshold value, then judge that the cell batteries are fail battery, sends alarm, if fiducial value is less than threshold value, judges
The cell batteries are fault-free.
In this step, described threshold value includes upper limit threshold and lower threshold, when characteristic value is more than upper limit threshold, judges
Cell batteries corresponding to this feature value are fail battery；When characteristic value is less than lower threshold, judge corresponding to this feature value
Cell batteries are fault-free；When characteristic value is located between upper limit threshold values and lower threshold, to monomer corresponding to this feature value
Battery gives a warning.
In this step, by memory storage data signal, by comparison module predetermined threshold value, by alarm relay mould
Block sends alarm, and the characteristic value of each cell batteries is calculated by main control module.Concrete principle is：ADC modular converters successively will
Plurality of voltages signal is converted into data signal and exports to main control module, and main control module stores in memory module each data signal
In, and the characteristic value of each cell batteries is calculated according to each data signal, then each characteristic value is default with comparison module
Threshold value is compared, if fiducial value be more than threshold value, judge this feature value corresponding to cell batteries be fail battery, master control mould
Block control relay alarm module, if fiducial value be less than threshold value, judge this feature value corresponding to cell batteries be fault-free,
Finally, comparative result is sent to host computer by communication module.Wherein, because characteristic value and threshold value are with variation with temperature
Change, therefore, the measurement of temperature can be also realized while voltage is measured.
The present invention when actually used, because the group number of wind-driven generator pitching motor standby lead-acid accumulator is generally three
Group, and every group includes 18 cell batteries, therefore can be by voltage regulator module neutron adjusting module and voltage attenuation module
The quantity of neutron attenuation module is disposed as 18.Wherein, after 18 sub- attenuation modules will be adjusted through 18 sub- adjusting modules
After 18 road voltage signals decay to the input range of suitable multiplexing module and ADC modular converters, then by the signal after decay
Send into multiplexing module.Because the output impedance of each road signal is extremely low, amplitude change is smaller, therefore, after multy-way switching
The sampling energy holding circuit of ADC modular converters is stablized quickly, and then can reach the 1mS times and complete sweeping for 18 road voltage signals
Retouch.
Claims (5)
1. a kind of accumulator failure detection method, it is characterised in that comprise the following steps：
（1）The voltage of each cell batteries in collection batteries, and adjust the voltage of each cell batteries；Described adjustment is
Refer to the common-mode voltage for deducting each cell batteries, obtain the differential mode voltage of each cell batteries；
（2）Differential mode voltage to each cell batteries carries out attenuation processing, and voltage signal after decay is converted into data signal
Output；
（3）The characteristic value of each cell batteries is calculated according to data signal, each characteristic value is compared with default threshold value,
If fiducial value is more than threshold value, judge that the cell batteries are fail battery, send alarm, if fiducial value is less than threshold value, sentence
The fixed cell batteries are fault-free.
2. a kind of accumulator failure detection method as claimed in claim 1, it is characterised in that：The step（1）In by electricity
Pressure adjusting module is gathered and adjusts the voltage of each cell batteries, and the voltage regulator module includes multiple son tune being connected in series
Mould preparation block, many sub- adjusting modules are connected with each cell batteries in batteries respectively.
3. a kind of accumulator failure detection method as claimed in claim 1, it is characterised in that：The step（2）In by electricity
Pressure attenuation module carries out attenuation processing, and the voltage attenuation module includes multiple sub- attenuation modules being connected in series, and many height decline
Subtract module to be connected with many sub- adjusting modules respectively.
4. a kind of accumulator failure detection method as claimed in claim 1, it is characterised in that：The step（2）In to each list
After the differential mode voltage of accumulator body carries out attenuation processing, plurality of voltages signal is obtained, plurality of voltages signal is converted into number successively
Word signal is simultaneously exported.
5. a kind of accumulator failure detection method as claimed in claim 1, it is characterised in that：The step（3）In threshold value
Including upper limit threshold and lower threshold, when characteristic value is more than upper limit threshold, judge that the cell batteries are fail battery；Work as spy
When value indicative is less than lower threshold, judge that the cell batteries are fault-free；When characteristic value be located at upper limit threshold values and lower threshold it
Between when, the cell batteries are given a warning.
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| CN201611144574.1A CN106772077A (en) | 2016-12-13 | 2016-12-13 | A kind of accumulator failure detection method |
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|---|---|---|---|
| CN201611144574.1A CN106772077A (en) | 2016-12-13 | 2016-12-13 | A kind of accumulator failure detection method |
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Family
ID=58880556
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102216795A (en) * | 2008-09-18 | 2011-10-12 | 株式会社Lg化学 | Apparatus and method for monitoring voltages of cells of battery pack |
| CN201373909Y (en) * | 2009-02-17 | 2009-12-30 | 朱灿 | Device for testing voltage of single battery of battery pack |
| CN102269798A (en) * | 2010-06-07 | 2011-12-07 | 四川德源电气有限公司 | Method and device for detecting faulty battery |
| CN202121023U (en) * | 2011-05-20 | 2012-01-18 | 西安康本通讯科技有限公司 | Intelligent online monitoring compensator of battery pack |
| CN103499368A (en) * | 2013-09-10 | 2014-01-08 | 福州开发区星云电子自动化有限公司 | Device for measuring voltage and temperature of lithium battery pack |
| CN203502567U (en) * | 2013-09-10 | 2014-03-26 | 福州开发区星云电子自动化有限公司 | Charge and discharge testing device for power lithium battery pack |
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Application publication date: 20170531 |