CN107121639B - A kind of multi-Dimensional parameters direct current system accumulator cell management method and device - Google Patents
A kind of multi-Dimensional parameters direct current system accumulator cell management method and device Download PDFInfo
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- CN107121639B CN107121639B CN201710300804.7A CN201710300804A CN107121639B CN 107121639 B CN107121639 B CN 107121639B CN 201710300804 A CN201710300804 A CN 201710300804A CN 107121639 B CN107121639 B CN 107121639B
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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]
- G01R31/3644—Constructional arrangements
- G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3828—Arrangements for monitoring battery or accumulator variables, e.g. SoC using current integration
Abstract
The embodiment of the invention discloses a kind of multi-Dimensional parameters direct current system accumulator cell management method and devices, by carrying out multi-Dimensional parameters monitoring and status tracking to battery, the variation of accumulator property is analyzed from multi-angle, in the past isolated parameter is together in series, form Life cycle curve, and showed on time dimension, incipient fault hidden danger existing for internal storage battery can be found in the angle of macroscopic view, and propose treatment advice, it avoids because single monitoring method bring performance is misjudged and is judged by accident, has positive effect for the safe and stable operation of battery.Simultaneously, according to Life cycle curve, carry out operating status trending analysis, reduce situation of slipping because of caused by mistakes and omissions situation caused by monitoring device error and human error, there is catastrophic discontinuityfailure to prevent battery group, the potential faults of DC bus decompression are reduced, the security reliability of direct current system operation is improved.
Description
Technical field
The present invention relates to battery management field more particularly to a kind of multi-Dimensional parameters direct current system accumulator cell management method and
Device.
Background technique
DC power system in the power plant and substation of electric system is mainly by monitoring device, charging unit, electric power storage
The composition such as pond group, DC bus and feeding line portion is relay protection, control loop, monitoring device and communication equipment etc. in plant stand
Reliable working power guarantee is provided, to the safe and stable operation of power infrastructures, plays very important effect.
In recent years, how comprehensively the failure that electric system DC power system occurs by battery problem is increasing,
The incipient fault for diagnosing battery becomes the task of top priority.
Common method has battery voltage method, accumulator internal resistance method, storage battery checking volumetric method etc..
Battery voltage method, using the voltage of the every section battery of accumulator voltage monitoring device real-time measurement, according to electric power storage
The difference condition of battery voltage is respectively saved in the group of pond, it is biggish to deviation to be paid close attention to, when single-unit battery voltage is more than alarm
Threshold values is abnormal.The use popularity rate of the method is higher, but acquisition precision is not high, and stability is poor, often occurs reporting by mistake and leak
The case where report, only has directive significance, cannot reflect comprehensively battery there are the problem of, especially potential problems.
Accumulator internal resistance method measures the internal driving of every section battery by direct-current discharge method or exchange injection method, and
By with battery using when initial data for the first time be compared, obtain the difference that the internal resistance of battery is respectively saved in battery group
Situation, it is biggish for deviation to be paid close attention to, it is abnormal when bias ratio is more than a certain range.The method is needed to existing direct current
System and Battery measuring apparatus are reequiped, higher cost, and the popularity rate of practical application is relatively low, and accumulator internal resistance data are only
Limit can not carry out across comparison to surveyed battery group longitudinal comparison, and measurement multiplicity is lower, have certain limitation,
As battery voltage method, belong to more single test method.
Storage battery checking volumetric method carries out 100% proof discharge to battery group using constant-current discharge equipment, if
Then determine that this group storage battery is unqualified when its off-capacity 80%.Normally 1-2 carries out 1 time 100% verification
Property electric discharge, to ensure that battery performance is met the requirements, but practical time-consuming and laborious when executing, and close on 2 cores and hold time intervals
Longer (- 24 months 12 months), the indiscoverable potential problems within interval time, and while finding the problem, are usually late.
In current existing situation, Normal practice is to be managed using some way in the above method to battery, because
It is all had some limitations for every kind of method, can not really and comprehensively reflect potential problems existing for battery itself.
Especially when battery group carries out charge/discharge, if there are problem, monitoring parameters for individual batteries in whole group
(voltage or internal resistance) deviation is larger, and monitoring device then generates warning note.At this point, usually there are two types of processing methods: first is that automatic
Stop current charge/discharge, causes whole group battery-operated abnormal to prevent individual accumulator properties from deteriorating.If at unmanned
Reason is abnormal and restores to former charge discharge state, then battery group is in the state for not completing complete charge/discharge process, i.e.,
There is the case where charge less；Second is that continue current charge/discharge, to handle in time individual batteries there are the problem of need
Intervening manually could stop, and otherwise will continue current charge/discharge process, until entire charge/discharge process is completed, at this time
The problem of easily leading to individual batteries, is more serious, that is, occur overcharging/over-discharge the case where, but charge/discharge process is completed
Report alarm signal can largely disappear, and hidden danger still exists.
Most of substation is unattended station at this stage, according to existing direct current system operating standard, every 3 months direct currents
System, which must be timed automatically battery group, fills.When individual batteries when something goes wrong or direct current system other parts are different
Often (such as charger output abnormality, monitoring sampling abnormal), if disposed according to aforementioned two kinds of processing methods it is abnormal, because cannot and
When the problem of obtaining the concern and processing of operation maintenance personnel, will lead to battery aggravation, and constantly deteriorate, cause battery long
Phase is in charge less electricity/overcharge/over-discharge state, and then influences battery whole group performance.
In conclusion at this stage, battery is monitored single generally existing monitoring method on-line and easy wrong report and is failed to report
Situation, operation maintenance personnel are negligent of daily management and abnormal investigation, by existing accumulator cell management method, when individual batteries occur
Abnormal (true, report by mistake, fail to report), there are the problem of be unable to get timely processing, cause failure and hidden danger that cannot find in time, and
It may cause hidden danger expansion, and then the major hidden danger for causing battery group whole group to fail.
Existing accumulator monitoring means cannot accurately reflect the actual performance and state of battery comprehensively, can not be in the time
Equal various dimensions carry out the tracking of comprehensive performance and state, when battery being caused to occur abnormal, interrupt charge/discharge or by force
Charge/discharge fails to be handled in current time node, does not notice that exception influences for a long time for caused by battery, and
It is long-term to influence bring potential faults.
Summary of the invention
The embodiment of the invention provides a kind of multi-Dimensional parameters direct current system accumulator cell management method and devices, for battery
Group carries out full and complete description and embodiment to accumulator status from different dimensions, according to multi-parameter, and system fortune can be improved
Row reliability reduces operation and maintenance intensity, finds the potential risk of battery, has reality and positive effect.
The embodiment of the invention provides a kind of multi-Dimensional parameters direct current system accumulator cell management methods, comprising:
After the current state of confirmation battery is to fill state or discharge condition, pass through high-speed, high precision AD Acquisition Circuit
The transient current and end voltage for getting battery, carry out integral operation to transient current by preset formula, obtain battery
Current state-of-charge, and battery corresponding with the current state-of-charge of battery is got according to the current state-of-charge of battery and is worked as
Preceding residual capacity；
Preset battery management characteristic curve is got, preset battery management characteristic curve is carried out by interpolation method slotting
Value Operations obtain target battery management characteristic curve；
It is predicted by method of moving average opposite end voltage, obtains voltage change trend, and to the current charged shape of battery
State, battery current remaining capacity, voltage change trend are fitted to obtain the amplitude of battery management curve；
The duration and accumulator parameter for getting the previous state of battery, to continuing for the previous state of battery
Duration and accumulator parameter carry out the duration that the current state of battery management curve is calculated, and with battery management
The amplitude of curve obtains battery current state using the duration of the current state of battery management curve as X-axis for Y-axis
Battery management curve；
It is special that partial target battery management corresponding with current state is got in target battery management characteristic curve
Linearity curve, it is inclined between the battery management curve and partial target battery management characteristic curve of calculating accumulator current state
Difference, and output bias.
Preferably, a kind of multi-Dimensional parameters direct current system accumulator cell management method provided in an embodiment of the present invention further include:
Whether judgment bias is greater than deviation threshold, if more than, confirmation accumulator property there are exception and carries out alarm operation,
If being less than, terminate.
Preferably, a kind of multi-Dimensional parameters direct current system accumulator cell management method provided in an embodiment of the present invention further include:
After the current state for confirming battery is floating charge state, electric power storage is got by high-speed, high precision AD Acquisition Circuit
The floating current in pond, and floating current is predicted by the method for moving average to obtain floating current variation tendency.
Preferably, after the current state in confirmation battery is floating charge state, electricity is acquired by High-Speed High-Accuracy AD
Road gets the floating current of battery, and is predicted to obtain floating current variation to floating current by the method for moving average and
After gesture further include:
Judge whether floating current variation tendency is greater than preset growth threshold value, if more than there are different for confirmation accumulator property
Often and alarm operation is carried out, if being less than, terminated.
Preferably, the preset formula are as follows:
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnIt is battery n hours
Discharge rate capacity, η are accumulator charging/discharging process coulombic efficiency, and I is transient current.
Preferably, the embodiment of the invention also provides a kind of multi-Dimensional parameters direct current system accumulator management devices, comprising:
Arithmetic element, for passing through high speed height after the current state of confirmation battery is to fill state or discharge condition
Precision AD Acquisition Circuit gets the transient current and end voltage of battery, carries out integral fortune to transient current by preset formula
It calculates, obtains the current state-of-charge of battery, and get and the current state-of-charge of battery according to the current state-of-charge of battery
Corresponding battery current remaining capacity；
Interpolating unit, for getting preset battery management characteristic curve, by interpolation method to preset battery management
Characteristic curve carries out interpolation operation, obtains target battery management characteristic curve；
Predicting unit obtains voltage change trend, and to electric power storage for being predicted by method of moving average opposite end voltage
The current state-of-charge in pond, battery current remaining capacity, voltage change trend are fitted to obtain the width of battery management curve
Value；
First computing unit, for getting the duration and accumulator parameter of the previous state of battery, to electric power storage
The duration and accumulator parameter of the previous state in pond carry out continuing for the current state that battery management curve is calculated
Duration, and using the amplitude of battery management curve as Y-axis, using the duration of the current state of battery management curve as X-axis,
Obtain the battery management curve of battery current state；
Second computing unit, for getting part corresponding with current state in target battery management characteristic curve
Target battery management characteristic curve, the battery management curve and partial target battery management of calculating accumulator current state
Deviation between characteristic curve, and output bias.
Preferably, a kind of multi-Dimensional parameters direct current system accumulator management device provided in an embodiment of the present invention further include:
Whether the first judging unit is greater than deviation threshold for judgment bias, if more than there are different for confirmation accumulator property
Often and alarm operation is carried out, if being less than, terminated.
Preferably, a kind of multi-Dimensional parameters direct current system accumulator management device provided in an embodiment of the present invention further include:
Acquiring unit, for being acquired by High-Speed High-Accuracy AD after the current state of confirmation battery is floating charge state
Circuit gets the floating current of battery, and is predicted by the method for moving average floating current to obtain floating current variation
Trend.
Preferably, a kind of multi-Dimensional parameters direct current system accumulator management device provided in an embodiment of the present invention further include:
Second judgment unit, for judging whether floating current variation tendency is greater than preset growth threshold value, if more than confirmation
Accumulator property is there are exception and carries out alarm operation, if being less than, terminates.
Preferably, the preset formula are as follows:
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnIt is battery n hours
Discharge rate capacity, η are accumulator charging/discharging process coulombic efficiency, and I is transient current.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
The embodiment of the invention provides a kind of multi-Dimensional parameters direct current system accumulator cell management method and devices, wherein this is more
It is to fill state or discharge condition that dimension parameter direct current system accumulator cell management method, which includes: in the current state for confirming battery,
Afterwards, the transient current and end voltage that battery is got by high-speed, high precision AD Acquisition Circuit, by preset formula to instantaneous
Electric current carries out integral operation, obtains the current state-of-charge of battery, and is got according to the current state-of-charge of battery and electric power storage
The corresponding battery current remaining capacity of the current state-of-charge in pond；Preset battery management characteristic curve is got, interpolation is passed through
Method carries out interpolation operation to preset battery management characteristic curve, obtains target battery management characteristic curve；By mobile flat
Equal method opposite end voltage is predicted, obtains voltage change trend, and hold to the current state-of-charge of battery, battery current residual
Amount, voltage change trend are fitted to obtain the amplitude of battery management curve；Get continuing for the previous state of battery
Duration and accumulator parameter, duration and accumulator parameter to the previous state of battery carry out that battery pipe is calculated
The duration of the current state of curve is managed, and using the amplitude of battery management curve as Y-axis, with working as battery management curve
The duration of preceding state is X-axis, obtains the battery management curve of battery current state；In target battery management characteristic
Partial target battery management characteristic curve corresponding with current state, the storage of calculating accumulator current state are got in curve
Deviation between battery management curve and partial target battery management characteristic curve, and output bias.Root of the embodiment of the present invention
Factually border operating status is fitted battery management indicatrix, carries out comprehensive to different parameters using fuzzy mathematics and is formed and judged
And analysis, and then form the tracking of Life cycle condition curve and assessment.Life cycle curve will be unknown in actual motion
Accumulator status carries out digitlization statistics and information-based analysis, has effect of visualization, can intuitively reflect that current battery exists
Failure and problem and development trend situation in Life cycle, especially for the discovery early of battery potential risk,
And it deploys to ensure effective monitoring and control of illegal activities in advance and prevention important role and meaning.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of process signal of multi-Dimensional parameters direct current system accumulator cell management method provided in an embodiment of the present invention
Figure；
Fig. 2 is that a kind of another process of multi-Dimensional parameters direct current system accumulator cell management method provided in an embodiment of the present invention is shown
It is intended to；
Fig. 3 is a kind of structural representation of multi-Dimensional parameters direct current system accumulator management device provided in an embodiment of the present invention
Figure；
Fig. 4 is the characteristic schematic diagram of direct current system battery management.
Specific embodiment
The embodiment of the invention provides a kind of multi-Dimensional parameters direct current system accumulator cell management method and devices, for battery
Group carries out full and complete description and embodiment to accumulator status from different dimensions, according to multi-parameter, and system fortune can be improved
Row reliability reduces operation and maintenance intensity, finds the potential risk of battery, has reality and positive effect.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Referring to Fig. 1, one of a kind of multi-Dimensional parameters direct current system accumulator cell management method provided in an embodiment of the present invention
Embodiment, comprising:
101, it after the current state of confirmation battery is to fill state or discharge condition, is acquired by High-Speed High-Accuracy AD
Circuit gets the transient current and end voltage of battery, carries out integral operation to transient current by preset formula, is stored
The current state-of-charge of battery, and electric power storage corresponding with the current state-of-charge of battery is got according to the current state-of-charge of battery
Pond current remaining capacity；
102, get preset battery management characteristic curve, by interpolation method to preset battery management characteristic curve into
Row interpolation operation, obtains target battery management characteristic curve；
103, it is predicted by method of moving average opposite end voltage, obtains voltage change trend, and to the current lotus of battery
Electricity condition, battery current remaining capacity, voltage change trend are fitted to obtain the amplitude of battery management curve；
104, the duration and accumulator parameter for getting the previous state of battery, to the previous state of battery
Duration and accumulator parameter carry out the duration that the current state of battery management curve is calculated, and with battery
It is current to obtain battery using the duration of the current state of battery management curve as X-axis for Y-axis for the amplitude of management curve
The battery management curve of state；
105, partial target battery pipe corresponding with current state is got in target battery management characteristic curve
Characteristic curve is managed, between the battery management curve and partial target battery management characteristic curve of calculating accumulator current state
Deviation, and output bias.
Status is to rely primarily on accumulator voltage monitoring at present, judges battery by single-unit battery voltage consistency
The superiority and inferiority of performance is limited to the production technology level and monomer voltage acquisition precision of battery, often will appear wrong report and fail to report.
Accumulator internal resistance method popularity rate is low, at high cost, and historical data is needed to accumulate, and only realizes longitudinal comparison, can not direct across comparison.It stores
Battery check volumetric method takes time and effort, at high cost, and monitoring interval time is too long, poor in timeliness.
At this stage, the diagnostic method of accumulator status is single and ineffective, reflection battery that cannot be comprehensive and accurate
Actual performance and state, usually assessed and judged according only to single parameters such as voltage or internal resistances, mostly static judgement, and
Nonkinetic analysis, the case where misjudging and failing to judge, are more, and fail completely to execute battery management program and curve after there are mistakes and omissions,
Incipient fault hidden danger fails to find in time, causes battery to run in spite of illness, influence system run all right.
Mainly pass through multi-Dimensional parameters carries out long-term performance and status tracking to accumulator status to the present invention, by its reality
The accumulator status curve and battery management characteristic curve fitting of operation, so as to carry out comprehensive descision in multidimensional to battery
And trend analysis, it is ensured that the real result of analyzing and diagnosing is reliable, and can find the problem of it is potentially present of, and avoids hidden danger further
Expand, reduces failure and accident odds.
Referring to Fig. 2, a kind of multi-Dimensional parameters direct current system accumulator cell management method provided in an embodiment of the present invention is another
A embodiment, comprising:
201, it after the current state of confirmation battery is to fill state or discharge condition, is acquired by High-Speed High-Accuracy AD
Circuit gets the transient current and end voltage of battery, carries out integral operation to transient current by preset formula, is stored
The current state-of-charge of battery, and electric power storage corresponding with the current state-of-charge of battery is got according to the current state-of-charge of battery
Pond current remaining capacity；
202, get preset battery management characteristic curve, by interpolation method to preset battery management characteristic curve into
Row interpolation operation, obtains target battery management characteristic curve；
203, it is predicted by method of moving average opposite end voltage, obtains voltage change trend, and to the current lotus of battery
Electricity condition, battery current remaining capacity, voltage change trend are fitted to obtain the amplitude of battery management curve；
204, the duration and accumulator parameter for getting the previous state of battery, to the previous state of battery
Duration and accumulator parameter carry out the duration that the current state of battery management curve is calculated, and with battery
It is current to obtain battery using the duration of the current state of battery management curve as X-axis for Y-axis for the amplitude of management curve
The battery management curve of state；
205, partial target battery pipe corresponding with current state is got in target battery management characteristic curve
Characteristic curve is managed, between the battery management curve and partial target battery management characteristic curve of calculating accumulator current state
Deviation, and output bias.
206, whether judgment bias is greater than deviation threshold, if more than confirmation accumulator property there are exception and is alarmed
Operation, if being less than, terminates.
It should be noted that can judge the current state of battery before executing step 201, if confirmation electric power storage
The current state in pond is floating charge state, then executes following steps:
After the current state for confirming battery is floating charge state, electric power storage is got by high-speed, high precision AD Acquisition Circuit
The floating current in pond, and floating current is predicted by the method for moving average to obtain floating current variation tendency；
Judge whether floating current variation tendency is greater than preset growth threshold value, if more than there are different for confirmation accumulator property
Often and alarm operation is carried out, if being less than, terminated.
Further, preset formula are as follows:
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnIt is battery n hours
Discharge rate capacity, η are accumulator charging/discharging process coulombic efficiency, and I is transient current.
It is the detailed description carried out to a kind of multi-Dimensional parameters direct current system accumulator cell management method above, for ease of understanding,
A kind of application of multi-Dimensional parameters direct current system accumulator cell management method will be illustrated with a concrete application scene, is applied below
Example include:
Direct current system generallys use valve controlled sealed lead-acid accumulator, and battery management characteristic curve is as shown in Figure 4.
It fills and just fills, battery is in original state, needs long period equalizaing charge, usual t1 ≈ 15h.
Floating charge is daily, maintains battery self-discharge current, is 3 months according to regulation, usual t2, t4, t7 ≈ 2160h.
Timing is filled, battery is in fully charged state, needs less time equalizaing charge, usual t3 ≈ 3h.
Discharge accident & core holds, and unplanned property occurs in battery or plan electric discharge, usual t5 differ for several minutes to 15h.
Supplement is filled, the energy of supplement electric power storage tank discharge loss, the equalizaing charge time is indefinite, and usual t6 is related to t5
Connection.
In conjunction with the characteristics of above-mentioned each stage, main following five kinds of methods carry out various dimensions status assessment and analysis:
1, current integration method: SOC is storage battery charge state, directly embodiment accumulator capacity number.It is high using high speed
Precision A/D acquires the transient current of accumulator charging/discharging process in real time, and carries out integral operation by calculation formula, obtains electric power storage
The practical SOC state in pond, to judge and estimate battery current remaining capacity.
Formula:
Wherein: the final state-of-charge of SOC- battery；SOC0The initial state-of-charge of battery；It puts within Cn- battery n hours
Electric rate capacity；η-accumulator charging/discharging process coulombic efficiency；Transient current in I- accumulator charging/discharging process.
2, floating current method: If is floating current, for compensating battery self discharge and maintaining oxygen cycle compound.Using special
With floating current sensor (high-precision, shock resistance), will be put before Weak current signal by programmable gain amplifier (PGA)
Greatly, and using High-Speed High-Accuracy AD it acquires in real time, obtains mA grades of battery floating charge streams, about 1mA/Ah is left under regular situation
It is right.Floating current is bigger, then also means that the electric current to the corrosion current of grid and for water loss is also bigger.
Formula: If=Is+Ir
Wherein: If is battery floating charge stream, and Is is corrosion current, and Ir is for water loss current, and If is got over more than threshold values
It is big then illustrate that internal loss is bigger, it is bad to represent state.
3, voltage tendency method: Vn is accumulator voltage, is carried out in charge and discharge process in battery, with its dischargeable capacity
Variation, accumulator voltage also follows to be changed together, have strong correlation.Single-unit battery is sampled using difference preposition
Amplification, is avoided influence of the high common-mode voltage to Acquisition Circuit, is acquired in real time using High-Speed High-Accuracy AD, and obtaining precision is mV grades of storages
Battery terminal voltage.Single-unit accumulator voltage variation tendency can be analyzed by interpolation method according to accumulator cell charging and discharging indicatrix
Assess current capacities variation tendency.
Interpolation method, which refers to, carries out interpolation analysis for the data in the capacity of battery and the table of voltage relationship, and by table 1
Interior 50%, several click-through row interpolations such as 70%, 100%, obtains the corresponding relationship of approximate measurement voltage and capacity, is equivalent to handle
The originally table of n point becomes 2n, 4n, even more point, by the corresponding line chart of discrete measurement after multiple interpolation
Table is changed into smooth curve, guarantees that the matching of voltage and capacity is more acurrate, for example (data may not be accurate): i.e. original
There is corresponding 50%, the 2.06V corresponding 53% of 2.00V, if not interpolation, corresponding relationship can not be determined when voltage is 2.03, be passed through
After crossing interpolation, then can estimate is 51.5%.Interpolation is smoother for aim curve, and the method for moving average is the reality that will have been surveyed
Border curve carries out " extension ", and performance is the future trend of virtual condition, unrelated with aim curve.
By taking electric discharge as an example, 2V valve controlled sealed lead-acid accumulator discharge capacity and accumulator voltage relationship are as shown in table 1:
Table 1
| Discharge capacity | 50% | 70% | 100% |
| Accumulator voltage | 2.00V | 1.95V | 1.80V |
4, conservation of energy: accumulator charging/discharging process is electrochemical reaction process, according to conservation of energy principle, a part
It being embodied in the form of electrical energy/chemical energy conversion, another part is embodied in the form of thermal energy, internal resistance and the performance difference of every section battery,
It will lead to its temperature change difference.Tn is battery temp, is subject to battery terminal negative column temperature.In every section storage battery negative pole
Temperature sensors of high precision is installed, is acquired in real time using high-precision AD, obtains the temperature information of every section battery.Battery temp
Variance embody the consistency trend of each battery in battery group.
Formula: E0=EI+ET
Wherein: E0- battery gross energy；EI- battery electric energy/chemical energy；ET- battery thermal energy (temperature)；
Formula:
Wherein: σ-battery temp variance；TiSingle-unit battery temp；μ-battery temp mean value；N- whole battery
Quantity.
5, duration estimation algorithm: the duration in each stage can all be calculated according to accumulator parameter and be obtained in battery management curve
, duration used in NextState can be estimated and inferred according to previous state.Such as: when accumulator property decline, leading to its capacity
Decline, periodically fill or supplement fill during, duration t6 then can have found this problem significantly lower than computational theory value, and
The variation of its duration is tracked, the trend of accumulator property deterioration can be found, to find its incipient fault hidden danger.
There are mainly three types of states: floating charge, equal charge and discharge for battery operation in battery management curve.The present invention is according to upper
It states five kinds of methods and multi-Dimensional parameters management is carried out to battery.
When battery is in floating charge state, using floating current method, its floating current of real-time monitoring, and rolling average is used
Predicted method carries out trend analysis, is then exception when the expection of its growth trend will exceed prescribed threshold, indicates its both inner pad
Corrosion progress is very fast, and there are the risk of potential deterioration hidden danger, especially internal storage battery open circuit is higher.It should be noted that storing
The floating current of battery and its capacity have approximate proportionate relationship, as one timing of capacity of battery, floating current Ying Yi
In the range of a approximation, actually detected floating current is fitted and is matched with theoretical value, suitably by settable early warning threshold values
Deviation be allow, but if be more than early warning threshold values then indicate that there are hidden danger.
Battery, using current integration method and voltage tendency method, is estimated in when filling state and discharge condition by SOC
With the amplitude of voltage change trend fitting battery management curve, i.e. curve Y-axis situation.Conservation of energy mainly plays auxiliary corrective
Effect: calculating thermal loss, estimates existing energy deviation to correct SOC；Temperature variance is calculated, with parameters pair such as correction voltages
In the assessment of uniformity of storage batteries.Using duration estimation algorithm, current state electric power storage is calculated according to the SOC estimated value of previous state
Pond manages the duration of curve, as curve X-axis situation.When X-axis and Y-axis the fitting variance of battery management curve are more than to set
When determining threshold values, then it represents that there are deviations for accumulator property and its nominal performance, and there are potential deterioration hidden danger.It is practical to record battery
Operation curve, and show actual curve and manage the deviation of curve, to remind operation maintenance personnel to cause to pay close attention to, and as exception
The reference frame of battery management curve is continued to execute after processing.
When battery is there are when potential risk, filling in state and discharge condition, being easiest to the case where occurring is not go out
It now alarms, but X-axis and Y-axis fail to reach expected duration or amplitude by battery management curve.Because direct current system is not alarmed, also not
Generate alarm logging, and unattended website nobody at the scene, lead to many potential risks and ignore.Display and prompting are practical bent
Line and the deviation for managing curve, facilitate operation maintenance personnel and find and pay close attention to such incipient fault hidden danger.
It when battery is there are when abnormal performance, is filling in state and discharge condition, being easiest to the case where occurring is to occur
Alarm, battery management curve are forced to interrupt or force to continue to execute.If forced interruption, normal battery is caused to fail
Normal battery management curve is completed, the case where charge less occurs.If enforcing, abnormal battery is caused to be transported in spite of illness
Row occurs overcharging or the case where over-discharge.Correct way is the existing battery management curve of forced interruption, is handled abnormal and extensive
After answering normally, former battery management curve is continued to execute, until terminating.Abnormal because occurring, direct current system generates alarm at this time, but
Unattended website nobody at the scene, manual intervention and can not handle, abnormal undiscovered and processing causes battery to deteriorate
Problem is more serious.Display and the deviation for reminding actual curve and management curve, facilitate operation maintenance personnel and find and handle
It is abnormal, also important reference frame is provided for the battery management curve that continues to execute after restoring normal.
Above five kinds of methods are all the processes of actual curve and aim curve fitting.It is to adopt for Y-axis, mainly amplitude
With the mode of timing, direct calculating difference, the variance then done in specific time (fixed or settable) is calculated, and is obtained in spy
In fixing time, the degree of actual curve and aim curve fitting can avoid unexpected rank in this way and more change as judgment basis
Bring error and erroneous judgement.It is the difference according to estimated time and real time for X-axis, mainly time, directly judges,
The then no problem in tolerance, deviation is bigger, and declarative procedure time change is larger, more need to be paid close attention to and be handled.
Battery multi-Dimensional parameters management method analyzes and diagnoses battery operating status in conjunction with above-mentioned five kinds of methods, and
It is fitted battery management indicatrix according to actual motion state, using fuzzy mathematics different parameters is carried out comprehensive and is formed and sentenced
Disconnected and analysis, and then form the tracking of Life cycle condition curve and assessment.Life cycle curve will be unknown in actual motion
Accumulator status, carry out digitlization statistics and information-based analysis, there is effect of visualization, can intuitively reflect current battery
Failure and problem and development trend situation in Life cycle, especially for the hair early of battery potential risk
It is existing, and deploy to ensure effective monitoring and control of illegal activities in advance and prevention important role and meaning.
The above method from different dimensions, carries out full and complete battery group according to multi-parameter to accumulator status
Description and embodiment, can be improved system operation reliability, reduce operation and maintenance intensity, find the potential risk of battery,
With reality and positive effect.
Referring to Fig. 3, one of a kind of multi-Dimensional parameters direct current system accumulator management device provided in an embodiment of the present invention
Embodiment, comprising:
301, arithmetic element, for passing through height after the current state of confirmation battery is to fill state or discharge condition
Fast high-precision AD Acquisition Circuit gets the transient current and end voltage of battery, is accumulated by preset formula to transient current
Partite transport is calculated, and the current state-of-charge of battery is obtained, and is got according to the current state-of-charge of battery currently charged with battery
The corresponding battery current remaining capacity of state；
302, interpolating unit, for getting preset battery management characteristic curve, by interpolation method to preset battery
Management characteristic curve carries out interpolation operation, obtains target battery management characteristic curve；
303, predicting unit obtains voltage change trend, and right for being predicted by method of moving average opposite end voltage
The current state-of-charge of battery, battery current remaining capacity, voltage change trend are fitted to obtain battery management curve
Amplitude；
304, the first computing unit, it is right for getting the duration and accumulator parameter of the previous state of battery
The duration and accumulator parameter of the previous state of battery carry out the current state that battery management curve is calculated
Duration, and using the amplitude of battery management curve as Y-axis, the duration with the current state of battery management curve is
X-axis obtains the battery management curve of battery current state；
305, the second computing unit, it is corresponding with current state for being got in target battery management characteristic curve
Partial target battery management characteristic curve, the battery management curve and partial target battery of calculating accumulator current state
Deviation between management characteristic curve, and output bias.
Further, a kind of multi-Dimensional parameters direct current system accumulator management device provided in an embodiment of the present invention further include:
306, whether the first judging unit is greater than deviation threshold for judgment bias, if more than confirmation accumulator property is deposited
In exception and alarm operation is carried out, if being less than, is terminated.
Further, a kind of multi-Dimensional parameters direct current system accumulator management device provided in an embodiment of the present invention further include:
307, acquiring unit, for passing through High-Speed High-Accuracy AD after the current state of confirmation battery is floating charge state
Acquisition Circuit gets the floating current of battery, and is predicted by the method for moving average floating current to obtain floating current
Variation tendency.
Further, a kind of multi-Dimensional parameters direct current system accumulator management device provided in an embodiment of the present invention further include:
308, second judgment unit, for judging whether floating current variation tendency is greater than preset growth threshold value, if more than,
Confirmation accumulator property there are exception and carries out alarm operation, if being less than, terminates.
Further, preset formula are as follows:
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnIt is battery n hours
Discharge rate capacity, η are accumulator charging/discharging process coulombic efficiency, and I is transient current.
The embodiment of the present invention is by carrying out multi-Dimensional parameters monitoring and status tracking to battery, from multi-angle to battery
The variation of energy is analyzed, and in the past isolated parameter is together in series, and forms Life cycle curve, and carry out on time dimension
Show, incipient fault hidden danger existing for internal storage battery can be found in the angle of macroscopic view, and propose treatment advice, avoided
Because single monitoring method bring performance is misjudged and is judged by accident, there is positive effect for the safe and stable operation of battery.Meanwhile root
According to Life cycle curve, operating status trending analysis is carried out, is reduced because monitoring device error (mainly includes that battery parameter adjusting is different
Often, voltage and current acquisition abnormity, charger output abnormality) caused by slip caused by mistakes and omissions situation and human error situation, from
And prevent battery group and catastrophic discontinuityfailure occur, the potential faults of DC bus decompression are reduced, the peace of direct current system operation is improved
Full reliability.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of multi-Dimensional parameters direct current system accumulator cell management method characterized by comprising
After the current state of confirmation battery is to fill state or discharge condition, obtained by high-speed, high precision AD Acquisition Circuit
To the transient current and end voltage of battery, integral operation is carried out to transient current by preset formula, it is current to obtain battery
State-of-charge, and battery corresponding with the current state-of-charge of battery is got according to the current state-of-charge of battery and is currently remained
Covolume amount；
Preset battery management characteristic curve is got, interpolation behaviour is carried out to preset battery management characteristic curve by interpolation method
Make, obtains target battery management characteristic curve；
It is predicted by method of moving average opposite end voltage, obtains voltage change trend, and to the current state-of-charge of battery, storage
Battery current remaining capacity, voltage change trend are fitted to obtain the amplitude of battery management curve；
The duration and accumulator parameter for getting the previous state of battery, to the duration of the previous state of battery
The duration for the current state that battery management curve is calculated is carried out, and with accumulator parameter with battery management curve
Amplitude be that Y-axis using the duration of the current state of battery management curve as X-axis obtains the storage of battery current state
Battery management curve；
It is bent that partial target battery management characteristic corresponding with current state is got in target battery management characteristic curve
Line, the deviation between the battery management curve and partial target battery management characteristic curve of calculating accumulator current state,
And output bias.
2. multi-Dimensional parameters direct current system accumulator cell management method according to claim 1, which is characterized in that further include:
Whether judgment bias is greater than deviation threshold, if more than confirmation accumulator property there are exception and carries out alarm operation, if small
In then terminating.
3. multi-Dimensional parameters direct current system accumulator cell management method according to claim 1, which is characterized in that further include:
After the current state for confirming battery is floating charge state, battery is got by high-speed, high precision AD Acquisition Circuit
Floating current, and floating current is predicted by the method for moving average to obtain floating current variation tendency.
4. multi-Dimensional parameters direct current system accumulator cell management method according to claim 3, which is characterized in that described to confirm
The current state of battery be floating charge state after, the floating current of battery is got by high-speed, high precision AD Acquisition Circuit,
And after by the method for moving average being predicted to obtain floating current variation tendency to floating current further include:
Judge whether floating current variation tendency is greater than preset growth threshold value, if more than confirmation accumulator property has exception simultaneously
Alarm operation is carried out, if being less than, is terminated.
5. multi-Dimensional parameters direct current system accumulator cell management method according to claim 1, which is characterized in that the preset public affairs
Formula are as follows:
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnIt discharged for battery n hours
Rate capacity, η are accumulator charging/discharging process coulombic efficiency, and I is transient current.
6. a kind of multi-Dimensional parameters direct current system accumulator management device characterized by comprising
Arithmetic element, for passing through high-speed, high precision after the current state of confirmation battery is to fill state or discharge condition
AD Acquisition Circuit gets the transient current and end voltage of battery, carries out integral operation to transient current by preset formula,
The current state-of-charge of battery is obtained, and is got according to the current state-of-charge of battery corresponding with the current state-of-charge of battery
Battery current remaining capacity；
Interpolating unit, for getting preset battery management characteristic curve, by interpolation method to preset battery management characteristic
Curve carries out interpolation operation, obtains target battery management characteristic curve；
Predicting unit obtains voltage change trend, and work as to battery for being predicted by method of moving average opposite end voltage
Preceding state-of-charge, battery current remaining capacity, voltage change trend are fitted to obtain the amplitude of battery management curve；
First computing unit, for getting the duration and accumulator parameter of the previous state of battery, to battery
The duration and accumulator parameter of previous state carry out the duration that the current state of battery management curve is calculated,
And using the amplitude of battery management curve as Y-axis, using the duration of the current state of battery management curve as X-axis, obtain
The battery management curve of battery current state；
Second computing unit, for getting partial target corresponding with current state in target battery management characteristic curve
Battery management characteristic curve, the battery management curve and partial target battery management characteristic of calculating accumulator current state
Deviation between curve, and output bias.
7. multi-Dimensional parameters direct current system accumulator management device according to claim 6, which is characterized in that further include:
Whether the first judging unit is greater than deviation threshold for judgment bias, if more than confirmation accumulator property has exception simultaneously
Alarm operation is carried out, if being less than, is terminated.
8. multi-Dimensional parameters direct current system accumulator management device according to claim 6, which is characterized in that further include:
Acquiring unit, for passing through high-speed, high precision AD Acquisition Circuit after the current state of confirmation battery is floating charge state
It gets the floating current of battery, and floating current is predicted to obtain floating current variation by the method for moving average and is become
Gesture.
9. multi-Dimensional parameters direct current system accumulator management device according to claim 8, which is characterized in that further include:
Second judgment unit, for judging whether floating current variation tendency is greater than preset growth threshold value, if more than electric power storage is confirmed
Pond performance is there are exception and carries out alarm operation, if being less than, terminates.
10. multi-Dimensional parameters direct current system accumulator management device according to claim 6, which is characterized in that described preset
Formula are as follows:
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnIt discharged for battery n hours
Rate capacity, η are accumulator charging/discharging process coulombic efficiency, and I is transient current.
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| CN112883634B (en) * | 2021-01-18 | 2022-04-08 | 中国南方电网有限责任公司超高压输电公司广州局 | DC measurement system state prediction method and system based on multi-dimensional analysis |
| CN115693848A (en) * | 2022-10-25 | 2023-02-03 | 林源电力(南京)有限公司 | BMS battery management remote monitoring device |
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Effective date of registration: 20210210 Address after: No.757 Dongfeng East Road, Yuexiu District, Guangzhou City, Guangdong Province 510000 Patentee after: GUANGDONG POWER GRID Co. Patentee after: JIEYANG POWER SUPPLY BUREAU, GUANGDONG POWER GRID Co.,Ltd. Patentee after: ZHUHAI WATT ELECTRICAL EQUIPMENT Co.,Ltd. Address before: 522000 west section of Donger Road, Rongcheng District, Jieyang City, Guangdong Province (power dispatching building) Patentee before: JIEYANG POWER SUPPLY BUREAU, GUANGDONG POWER GRID Co.,Ltd. Patentee before: ZHUHAI WATT ELECTRICAL EQUIPMENT Co.,Ltd. |