CN104597406B - Lithium battery energy storage battery power system capacity declines analysis and processing method and analysis processing device - Google Patents
Lithium battery energy storage battery power system capacity declines analysis and processing method and analysis processing device Download PDFInfo
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- CN104597406B CN104597406B CN201410844008.6A CN201410844008A CN104597406B CN 104597406 B CN104597406 B CN 104597406B CN 201410844008 A CN201410844008 A CN 201410844008A CN 104597406 B CN104597406 B CN 104597406B
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 140
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 140
- 238000004146 energy storage Methods 0.000 title claims abstract description 138
- 238000004458 analytical method Methods 0.000 title claims abstract description 43
- 238000003672 processing method Methods 0.000 title claims abstract description 22
- 230000007423 decrease Effects 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 16
- 230000036541 health Effects 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 13
- 239000000178 monomer Substances 0.000 claims description 9
- 239000000284 extract Substances 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 12
- 210000004027 cell Anatomy 0.000 description 198
- 238000010586 diagram Methods 0.000 description 4
- 210000005056 cell body Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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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]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention discloses a kind of lithium battery energy storage battery power system capacity to decline analysis and processing method, and it comprises the following steps：Magnitude of voltage, temperature value and the capability value of battery cell in the process of running in lithium battery energy storage battery system are recorded, and magnitude of voltage, temperature value and capability value are stored to database；Each identical charge cycle of battery cell preset number and magnitude of voltage, temperature value and capability value in identical discharge cycle are extracted, generates the voltage history curve, Temperature history and capacity history curve of each battery cell；Compare voltage history curve, Temperature history or capacity history curve of the different battery cells in identical charge cycle or identical discharge cycle, it is determined that causing the battery cell that power system capacity declines.Which also discloses analysis processing device.The battery cell that the present invention determines to cause power system capacity to decline by voltage history curve, Temperature history and capacity history curve, has reached the technique effect of fast positioning battery cell to be replaced.
Description
Technical field
The invention belongs to technical field of battery management, more particularly to lithium battery energy storage battery power system capacity to decline analysis and processing method
And analysis processing device.
Background technology
Due to, lithium battery energy storage battery system is widely applied in the industries such as electric automobile, so, lithium battery energy storage battery system tool
There is the very big market demand.
But there is the problem of the following aspects in lithium battery energy storage battery system：First：It is each in lithium battery energy storage battery system
The actual capacity of individual battery cell is uneven, easily causes lithium battery energy storage battery power system capacity to decline；Second：As lithium battery stores up
The time that energy system uses is elongated, and the consume situation of each battery cell is inconsistent in lithium battery energy storage battery system, easily causes
Lithium battery energy storage battery power system capacity declines.
In summary, the technology for the battery cell that capacity declines how is caused in fast positioning lithium battery energy storage battery system to be asked
Topic, it is current technical problem urgently to be resolved hurrily.
The content of the invention
It is a primary object of the present invention to provide a kind of lithium battery energy storage battery power system capacity to decline analysis and processing method and analysis
Processing unit, solves the skill that prior art is unable to cause the battery cell of capacity decline in fast positioning lithium battery energy storage battery system
Art problem.
To achieve the above object, the invention provides a kind of lithium battery energy storage battery power system capacity to decline analysis and processing method, should
Lithium battery energy storage battery power system capacity declines analysis and processing method and comprised the following steps：
Magnitude of voltage, temperature value and the capability value of lithium battery energy storage battery system each battery cell in the process of running are recorded,
And the magnitude of voltage, temperature value and capability value are stored into database.
Extract each identical charge cycle of battery cell preset number and identical discharge cycle in lithium battery energy storage battery system
Interior magnitude of voltage, temperature value and capability value, generate voltage history curve, Temperature history and the appearance of each battery cell
Measure history curve.
Compare voltage history curve, temperature history of the different battery cells in identical charge cycle or identical discharge cycle
Curve or capacity history curve, it is determined that causing the battery cell that power system capacity declines.
Preferably, described record lithium battery energy storage battery system each battery cell magnitude of voltage in the process of running, temperature
Value and capability value, and before the magnitude of voltage, temperature value and capability value to be stored to the step into database, including：
The equalization function of lithium battery energy storage battery system is opened, is cut so that a battery cell in lithium battery energy storage battery system reaches
Only after voltage, lithium battery energy storage battery system continues charge or discharge.
Preferably, voltage history curve of the more different battery cells in identical charge cycle or discharge cycle,
Temperature history or capacity history curve, it is determined that the step of causing the battery cell that power system capacity declines, including：
Compare the voltage rate of rise of voltage history curve of the different battery cells in identical charge cycle or identical put
The voltage descending slope of voltage history curve in the electric cycle.
Obtain the voltage rate of rise or voltage descending slope is different from the voltage rate of rise of remaining battery cell
Or the battery cell to be replaced of voltage descending slope.
Judge whether the voltage history curve of the battery cell difference charge cycle to be replaced or discharge cycle is identical.
If identical, the initial capacity of the battery cell to be replaced is small.
Battery capacity is caused to decline if it is different, the battery cell consume to be replaced is excessive.
Preferably, voltage history curve of the more different battery cells in identical charge cycle or discharge cycle,
Temperature history or capacity history curve, it is determined that the step of causing the battery cell that power system capacity declines, including：
The temperature for comparing Temperature history of the different battery cells in identical charge cycle or discharge cycle rises tiltedly
Rate.
Obtain to be replaced battery list of the temperature rate of rise different from the temperature rate of rise of remaining battery cell
Body, the battery cell to be replaced are that Energy Efficiency Ratio is low.
Preferably, the more different battery cells are in the voltage history curve of identical charge cycle or discharge cycle, temperature
History curve or capacity history curve are spent, it is determined that the step of causing the battery cell that power system capacity declines, including：
The real system capability value MC of lithium battery energy storage battery system is obtained, and electricity is calculated according to formula S OH=MC/DC*100%
Pond health index SOH, wherein DC are nominal capacity value；
Judge battery health index SOH whether less than default health value.
If so, the capacity attenuation slope of the capacity history curve of more different battery cells, and obtain the capacity attenuation
Slope is different from the battery cell to be replaced of the capacity attenuation slope of remaining battery cell, the battery of the battery cell to be replaced
Capacity is small.
In addition, to achieve the above object, decline present invention also offers a kind of lithium battery energy storage battery power system capacity and analyze and process
Device, the lithium battery energy storage battery power system capacity, which declines analysis processing device, to be included：
Logging modle, for magnitude of voltage, the temperature value of lithium battery energy storage battery system each battery cell in the process of running
And capability value, and the magnitude of voltage, temperature value and capability value are stored into database.
Extraction module, for extracting each identical charge cycle of battery cell preset number in lithium battery energy storage battery system
With the magnitude of voltage in identical discharge cycle, temperature value and capability value, voltage history curve, the temperature of each battery cell are generated
History curve and capacity history curve.
Comparison module, for voltage history of the more different battery cells in identical charge cycle or identical discharge cycle
Curve, Temperature history or capacity history curve, it is determined that causing the battery cell that power system capacity declines.
Preferably, the lithium battery energy storage battery power system capacity declines analysis processing device and also included：
Balance module, for opening the equalization function of lithium battery energy storage battery system, so that one in lithium battery energy storage battery system
After battery cell reaches blanking voltage, lithium battery energy storage battery system continues charge or discharge.
Preferably, the lithium battery energy storage battery power system capacity declines analysis processing device and also includes obtaining module and determination module.
The comparison module, it is additionally operable to the electricity of voltage history curve of the different battery cells of comparison in identical charge cycle
Press the voltage descending slope of the rate of rise or the voltage history curve in identical discharge cycle.
Module is obtained, is different from remaining battery cell for obtaining the voltage rate of rise or voltage descending slope
The battery cell to be replaced of the voltage rate of rise or voltage descending slope.
Determination module, for judging that the voltage history of the battery cell difference charge cycle to be replaced or discharge cycle is bent
Whether line is identical, if identical, the initial capacity of the battery cell to be replaced is small, if it is different, the battery cell consumption to be replaced
Damaging excessive causes battery capacity to decline.
Preferably, the comparison module, the different battery cells of comparison are additionally operable in identical charge cycle or discharge cycle
Temperature history the temperature rate of rise.
The acquisition module, it is additionally operable to obtain temperature rising of the temperature rate of rise different from remaining battery cell
The battery cell to be replaced of slope, the battery cell to be replaced are that Energy Efficiency Ratio is low.
Preferably, the acquisition module, be additionally operable to obtain lithium battery energy storage battery system real system capability value MC, and according to
It is nominal capacity value that formula S OH=MC/DC*100%, which calculates battery health index SOH, wherein DC,.
The determination module, it is additionally operable to judge battery health index SOH whether less than default health value.
The comparison module, is additionally operable to the capacity attenuation slope of the capacity history curve of the different battery cells of comparison, and obtains
The battery cell to be replaced that the capacity attenuation slope is different from the capacity attenuation slope of remaining battery cell is obtained, it is described to be replaced
The battery capacity of battery cell is small.
First, each battery cell magnitude of voltage in the process of running in present invention record lithium battery energy storage battery system,
Temperature value and capability value, and the magnitude of voltage, temperature value and capability value are stored into database.
Secondly, when being detected to lithium battery energy storage battery system, each battery cell present count is extracted from database
The identical charge cycle of mesh and magnitude of voltage, temperature value and capability value in identical discharge cycle, generate the electricity of each battery cell
Press history curve, Temperature history and capacity history curve.
Again, the voltage history by more different battery cells in identical charge cycle or identical discharge cycle is bent
Line, Temperature history or capacity history curve, it is determined that causing the battery cell that power system capacity declines.
Finally, the battery cell for causing power system capacity to decline is replaced using new battery cell.
In summary, the present invention has reached the battery list that fast positioning causes power system capacity to decline by above-mentioned mode
The technique effect of body.
Meanwhile the present invention is inconsistent by voltage history curve, Temperature history or capacity history curve rejecting performance
Battery cell, avoid lithium battery energy storage battery system because the performance of battery cell is inconsistent, cause capacity decline problem hair
It is raw.
Figure of description
Fig. 1 is the schematic flow sheet that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 1；
Fig. 2 is the curve map that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 1；
Fig. 3 is the flow chart that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 2；
Fig. 4 is the flow chart that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 3；
Fig. 5 is the flow chart that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 4；
Fig. 6 is the flow chart that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 5；
Fig. 7 is the functional block diagram that lithium battery energy storage battery power system capacity of the present invention declines analysis processing device embodiment 6；
Fig. 8 is the functional block diagram that lithium battery energy storage battery power system capacity of the present invention declines analysis processing device embodiment 7；
Fig. 9 is the functional block diagram that lithium battery energy storage battery power system capacity of the present invention declines analysis processing device embodiment 8.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used to limit the present invention.
Embodiment 1
Referring to Fig. 1 and Fig. 2, Fig. 1 is the stream that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 1
Journey schematic diagram；Fig. 2 is the curve map that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 1.
In embodiment 1, the invention provides a kind of lithium battery energy storage battery power system capacity to decline analysis and processing method, and it includes
Following steps：
Step S10, record lithium battery energy storage battery system each battery cell magnitude of voltage in the process of running, temperature value and
Capability value, and the magnitude of voltage, temperature value and capability value are stored into database.
The running of each battery cell of lithium battery energy storage battery system includes charging process and discharge process.
In the running of lithium battery energy storage battery system, the voltage of each battery cell of record lithium battery energy storage battery system
Value, temperature value and capability value, and the magnitude of voltage, temperature value and capability value of each battery cell are stored into database.
The present invention is reached by the way that the magnitude of voltage, temperature value and capability value of each battery cell are stored to database
The battery cell for causing lithium battery energy storage battery power system capacity to decline for positioning provides the technique effect of data support.
Step S11, extract each identical charge cycle of battery cell preset number and identical in lithium battery energy storage battery system
Magnitude of voltage, temperature value and capability value in discharge cycle, generate voltage history curve 3, the temperature history of each battery cell
Curve 2 and capacity history curve 1.
The N number of identical charge cycle of each battery cell and discharge cycle in lithium battery energy storage battery system are extracted from database
Magnitude of voltage, temperature value and capability value, generate the voltage history curve 3 of each battery cell, Temperature history 2 and
Capacity history curve 1.
Voltage history curve 3, Temperature history 2 and the capacity history curve 1 of each battery cell form this hair
Bright Fig. 2 curve map.
Mark 1 in Fig. 2 is the SOC (residual capacity) of each battery cell of lithium battery energy storage battery system curve map；
Mark 2 is the Temperature history of each battery cell of lithium battery energy storage battery system；Mark 3 is every for lithium battery energy storage battery system
One battery cell voltage history curve, mark 4 are the current history curve of lithium battery energy storage battery system.
It should be noted that the present invention can be as needed, recording voltage, electric current, battery capacity and battery temperature etc. are anti-
The parameter of battery performance is answered, further according to the data message of record, history curve is generated, determines to cause system by history curve
The technical scheme for the battery cell that capacity declines, can solve the technical problem of the present invention, therefore, the protection model in the present invention
Within enclosing.
Step S12, voltage history curve of the more different battery cells in identical charge cycle or identical discharge cycle
3rd, Temperature history 2 or capacity history curve 1, it is determined that causing the battery cell that power system capacity declines.
The present invention passes through the voltage history curve 3 in more identical charge cycle or identical discharge cycle, temperature history
Curve 2 or capacity history curve 1, if in the presence of the voltage history curve 3 with remaining battery cell, Temperature history 2 or holding
Measure the different battery cell of history curve 1, it is determined that the battery cell is the battery cell for causing power system capacity to decline.
First, each battery cell magnitude of voltage in the process of running in present invention record lithium battery energy storage battery system,
Temperature value and capability value, and the magnitude of voltage, temperature value and capability value are stored into database.
Secondly, when being detected to lithium battery energy storage battery system, each battery cell present count is extracted from database
The identical charge cycle of mesh and magnitude of voltage, temperature value and capability value in identical discharge cycle, generate the electricity of each battery cell
Press history curve, Temperature history and capacity history curve.
Again, the voltage history by more different battery cells in identical charge cycle or identical discharge cycle is bent
Line, Temperature history or capacity history curve, it is determined that causing the battery cell that power system capacity declines.
Finally, the battery cell for causing power system capacity to decline is replaced using new battery cell.
In summary, the present invention has reached the battery list that fast positioning causes power system capacity to decline by above-mentioned mode
The technique effect of body.
Meanwhile the present invention is inconsistent by voltage history curve, Temperature history or capacity history curve rejecting performance
Battery cell, avoid lithium battery energy storage battery system because the performance of battery cell is inconsistent, cause capacity decline problem hair
It is raw.
Embodiment 2
Referring to Fig. 3, Fig. 3 is the flow chart that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 2.
In example 2, with above-described embodiment 1 the step of, is essentially identical, and difference is, before the step S10,
Also include：
Step S20, the equalization function of lithium battery energy storage battery system is opened, so that a battery list in lithium battery energy storage battery system
After body reaches blanking voltage, lithium battery energy storage battery system continues charge or discharge.
The present invention has reached disposable and has determined all in lithium battery energy storage battery system to cause lithium battery to store up by equalization function
Cause lithium battery energy storage battery system in the technique effect for the battery cell that energy power system capacity declines, and lifting lithium battery energy storage battery system
The technique effect of the locating speed for the battery cell that capacity declines.
Embodiment 3
Referring to Fig. 4, Fig. 4 is the flow chart that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 3.
In embodiment 3, with above-described embodiment 1 the step of, is essentially identical, and difference is, the step S12, bag
Include：
Step S30, the voltage rate of rise of voltage history curve of the more different battery cells in identical charge cycle
Or the voltage descending slope of the voltage history curve in identical discharge cycle；
Compare the voltage rate of rise of voltage history curve of the different battery cells in identical charge cycle.
Either, the voltage descending slope of voltage history curve of the more different battery cells in identical discharge cycle.
Step S31, obtains the voltage rate of rise or voltage descending slope is different from the voltage of remaining battery cell
The battery cell to be replaced of the rate of rise or voltage descending slope.
By step S30 comparison, when the battery cell of poor-performing be present, its voltage rate of rise or voltage decline
Slope will differ from the voltage rate of rise or voltage descending slope of remaining battery cell.
The battery cell of the voltage rate of rise or voltage descending slope different from remaining battery cell is electricity to be replaced
Pond monomer.
Step S32, judging the voltage history curve of the battery cell difference charge cycle to be replaced or discharge cycle is
It is no identical.；
After battery cell to be replaced is judged, the present invention judges the battery cell difference charge cycle to be replaced or electric discharge
Whether the voltage history curve in cycle is identical.
Step S33, if identical, the initial capacity of the battery cell to be replaced is small.
If the voltage history curve of the battery cell difference charge cycle or discharge cycle to be replaced is identical, illustrate to open from one
When beginning, the capacity of the battery cell is just smaller.
Step S34, battery capacity is caused to decline if it is different, the battery cell consume to be replaced is excessive.
If the voltage history curve of the battery cell difference charge cycle or discharge cycle to be replaced differs, illustrate
During use, the battery cell consume to be replaced is larger.
The present invention determines battery list to be replaced by the voltage rate of rise or voltage descending slope of voltage history curve
Body, and can interpolate that out that the battery cell to be replaced is that initial capacity is small, still, during use, consume is excessive to be caused to hold
Measure small.
Embodiment 4
Referring to Fig. 5, Fig. 5 is the flow chart that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 4.
In example 4, with above-described embodiment 1 the step of, is essentially identical, and difference is, the step S12, bag
Include：
Step S40, the temperature of Temperature history of the more different battery cells in identical charge cycle or discharge cycle
Spend the rate of rise.
The temperature of Temperature history of the present invention by more different battery cells in identical charge cycle rises oblique
Rate.
Either, the temperature of the Temperature history by more different battery cells in identical discharge cycle rises oblique
Rate
Step S41, obtain the temperature rate of rise and treated more different from the temperature rate of rise of remaining battery cell
Battery cell is changed, the battery cell to be replaced is that Energy Efficiency Ratio is low.
When battery cell of the temperature rate of rise different from the temperature rate of rise of remaining battery cell, the then electricity being present
Pond monomer is battery cell to be replaced, and the Energy Efficiency Ratio of this battery cell to be replaced is low.
Low, low by the rejecting Energy Efficiency Ratio electricity of the Energy Efficiency Ratio of battery cell that the present invention is determined by Temperature history
Pond monomer so that form lithium battery energy storage battery system all battery cells Energy Efficiency Ratio be it is qualified, it is even outstanding, reach
The technique effect of the quality of lifting lithium battery energy storage battery system is arrived.
Embodiment 5
Referring to Fig. 6, Fig. 6 is the flow chart that lithium battery energy storage battery power system capacity of the present invention declines analysis and processing method embodiment 5.
In embodiment 5, essentially identical the step of with above-described embodiment 1, difference is, the step S12, bag
Include：
Step S50, the real system capability value MC of lithium battery energy storage battery system is obtained, and according to formula S OH=MC/DC*
100% calculating battery health index SOH, wherein DC is nominal capacity value.
First, lithium battery energy storage battery system of the invention be full of-is given out light once, is done and is once demarcated, and the calibration result is actual
Power system capacity value MC.
Secondly, it is nominal capacity value to calculate battery health index SOH, wherein DC according to formula S OH=MC/DC*100%.
Step S51, judge battery health index SOH whether less than default health value.
The battery health index SOH that step S50 is calculated the present invention is compared with default health value.
Step S52, if so, the capacity attenuation slope of the capacity history curve of more different battery cells, and described in acquisition
Capacity attenuation slope is different from the battery cell to be replaced of the capacity attenuation slope of remaining battery cell, the battery list to be replaced
The battery capacity of body is small.
If less than default health value, illustrate that the power system capacity of the lithium battery energy storage battery system is unqualified.
Compare the capacity attenuation slope of the capacity history curve of each battery cell in the lithium battery energy storage battery system again, i.e.,
Slope of a curve.
When exist capacity attenuation slope different from remaining battery cell capacity attenuation slope battery cell, the battery list
Body is battery cell to be replaced.
Step S53, if it is not, the lithium battery energy storage battery system is qualified.
If more than or equal to default health value, illustrate that the power system capacity of the lithium battery energy storage battery system is qualified.
The present invention quickly judges whether current lithium battery energy storage battery system is qualified by battery health index SOH.
If qualified, the judgement of next lithium battery energy storage battery system is carried out, reached quickening is to lithium battery energy storage battery system
No qualified judgement.
If unqualified, the capacity attenuation slope of the capacity history curve of more different battery cells, capacity attenuation is rejected
Slope is same as the battery cell of the capacity attenuation slope of remaining battery cell, it is ensured that the battery health index of lithium battery energy storage battery system
SOH is greater than or equal to default health value.
Embodiment 6
Referring to Fig. 7, Fig. 7 is the function mould that lithium battery energy storage battery power system capacity of the present invention declines analysis processing device embodiment 6
Block figure.
To achieve the above object, the embodiment of the present invention 6 additionally provides a kind of lithium battery energy storage battery power system capacity and declined at analysis
Device is managed, it includes：
Logging modle 10, for lithium battery energy storage battery system each battery cell magnitude of voltage in the process of running, temperature
Value and capability value, and the magnitude of voltage, temperature value and capability value are stored into database.
The running of each battery cell of lithium battery energy storage battery system includes charging process and discharge process.
In the running of lithium battery energy storage battery system, each battery list of the record lithium battery energy storage battery system of logging modle 10
Magnitude of voltage, temperature value and the capability value of body, meanwhile, logging modle 10 is by the magnitude of voltage, temperature value and appearance of each battery cell
Value is stored into database.
The present invention is stored the magnitude of voltage, temperature value and capability value of each battery cell to data by logging modle 10
Storehouse, the battery cell that reached causes lithium battery energy storage battery power system capacity to decline for positioning provide the technique effect of data support.
Extraction module 11, for extracting each identical charge cycle of battery cell preset number in lithium battery energy storage battery system
With the magnitude of voltage in identical discharge cycle, temperature value and capability value, voltage history curve, the temperature of each battery cell are generated
History curve and capacity history curve.
Extraction module 11 extracts the N number of identical charge cycle of each battery cell in lithium battery energy storage battery system from database
With the magnitude of voltage, temperature value and capability value of discharge cycle, voltage history curve, the temperature history of each battery cell are generated
Curve and capacity history curve.
It should be noted that the present invention can be as needed, recording voltage, electric current, battery capacity and battery temperature etc. are anti-
The parameter of battery performance is answered, extraction module 11 extracts the data message of record again, generates history curve, by history curve come really
Surely cause the technical scheme of the battery cell of power system capacity decline, can solve the technical problem of the present invention, therefore, in this hair
Within bright protection domain.
Comparison module 12, gone through for voltage of the more different battery cells in identical charge cycle or identical discharge cycle
History curve, Temperature history or capacity history curve, it is determined that causing the battery cell that power system capacity declines.
The present invention by the voltage history curve in 12 more identical charge cycle of comparison module or identical discharge cycle,
Temperature history or capacity history curve, if in the presence of voltage history curve, Temperature history with remaining battery cell
Or the battery cell that capacity history curve is different, it is determined that the battery cell is the battery cell for causing power system capacity to decline.
First, each battery cell in logging modle 10 of the invention record lithium battery energy storage battery system is in running
In magnitude of voltage, temperature value and capability value, and the magnitude of voltage, temperature value and capability value are stored into database.
Secondly, when being detected to lithium battery energy storage battery system, extraction module 11 extracts each battery from database
The identical charge cycle of monomer preset number and magnitude of voltage, temperature value and capability value in identical discharge cycle, generate each electricity
Voltage history curve, Temperature history and the capacity history curve of pond monomer.
Again, electricity of the comparison module 12 by more different battery cells in identical charge cycle or identical discharge cycle
History curve, Temperature history or capacity history curve are pressed, it is determined that causing the battery cell that power system capacity declines.
Finally, the battery cell for causing power system capacity to decline is replaced using new battery cell.
In summary, the present invention has reached the battery list that fast positioning causes power system capacity to decline by above-mentioned mode
The technique effect of body.
Meanwhile the present invention is inconsistent by voltage history curve, Temperature history or capacity history curve rejecting performance
Battery cell, avoid lithium battery energy storage battery system because the performance of battery cell is inconsistent, cause capacity decline problem hair
It is raw.
Embodiment 7
Referring to Fig. 8, Fig. 8 is the function mould that lithium battery energy storage battery power system capacity of the present invention declines analysis processing device embodiment 7
Block figure.
In embodiment 7, essentially identical with the functional module of above-described embodiment 6, difference is, lithium battery energy storage battery system
System capacity, which declines analysis processing device, also to be included：
Balance module 20, for opening the equalization function of lithium battery energy storage battery system, so that one in lithium battery energy storage battery system
After individual battery cell reaches blanking voltage, lithium battery energy storage battery system continues charge or discharge.
The present invention has reached disposable and has determined all in lithium battery energy storage battery system to cause lithium battery by balance module 20
Cause lithium battery energy storage battery system in the technique effect for the battery cell that energy storage system capacity declines, and lifting lithium battery energy storage battery system
The technique effect of the locating speed for the battery cell that capacity of uniting declines.
Embodiment 8
Referring to Fig. 9, Fig. 9 is the function mould that lithium battery energy storage battery power system capacity of the present invention declines analysis processing device embodiment 8
Block figure.
In embodiment 8, essentially identical with the functional module of above-described embodiment 6, difference is, lithium battery energy storage battery system
Capacity of uniting, which declines analysis processing device, also to be included obtaining module 30 and determination module 31；
The comparison module 12, it is additionally operable to voltage history curve of the different battery cells of comparison in identical charge cycle
The voltage descending slope of voltage history curve in the voltage rate of rise or identical discharge cycle.
The voltage of voltage history curve of the 12 more different battery cells of comparison module in identical charge cycle rises oblique
Rate.
Either, the voltage of voltage history curve of the 12 more different battery cells of comparison module in identical discharge cycle
Descending slope.
Module 30 is obtained, is different from remaining battery cell for obtaining the voltage rate of rise or voltage descending slope
The voltage rate of rise or voltage descending slope battery cell to be replaced.
When the battery cell of poor-performing be present, acquisition module 30 obtains the voltage rate of rise or voltage descending slope will
The battery cell of the voltage rate of rise or voltage descending slope different from remaining battery cell, the battery cell are to be replaced
Battery cell.
Determination module 31, for judging the voltage history of the battery cell difference charge cycle to be replaced or discharge cycle
Whether curve is identical, if identical, the initial capacity of the battery cell to be replaced is small, if it is different, the battery cell to be replaced
Consuming excessive causes battery capacity to decline.
Determination module 31, judge the voltage history curve of the battery cell difference charge cycle to be replaced or discharge cycle
It is whether identical.
If the voltage history curve of the battery cell difference charge cycle or discharge cycle to be replaced is identical, illustrate to open from one
When beginning, the capacity of the battery cell is just smaller.
If the voltage history curve of the battery cell difference charge cycle or discharge cycle to be replaced differs, illustrate
During use, the battery cell consume to be replaced is larger.
The present invention determines battery list to be replaced by the voltage rate of rise or voltage descending slope of voltage history curve
Body, and can interpolate that out that the battery cell to be replaced is that initial capacity is small, still, during use, consume is excessive to be caused to hold
Measure small.
Further,
The comparison module 12, it is additionally operable to temperature of the different battery cells of comparison in identical charge cycle or discharge cycle
The temperature rate of rise of history curve.
Temperature history of the present invention by 12 more different battery cells of comparison module in identical charge cycle
The temperature rate of rise.
Either, Temperature history by 12 more different battery cells of comparison module in identical discharge cycle
The temperature rate of rise.
The acquisition module 30, it is additionally operable to obtain the temperature rate of rise different from the temperature of remaining battery cell
The battery cell to be replaced of slope is risen, the battery cell to be replaced is that Energy Efficiency Ratio is low.
Obtain module 30 and obtain battery list of the temperature rate of rise different from the temperature rate of rise of remaining battery cell
Body, then the battery cell is battery cell to be replaced, and the Energy Efficiency Ratio of this battery cell to be replaced is low.
Low, low by the rejecting Energy Efficiency Ratio electricity of the Energy Efficiency Ratio of battery cell that the present invention is determined by Temperature history
Pond monomer so that form lithium battery energy storage battery system all battery cells Energy Efficiency Ratio be it is qualified, it is even outstanding, reach
The technique effect of the quality of lifting lithium battery energy storage battery system is arrived.
Further,
The acquisition module 30, it is additionally operable to obtain the real system capability value MC of lithium battery energy storage battery system, and according to formula
It is nominal capacity value that SOH=MC/DC*100%, which calculates battery health index SOH, wherein DC,.
First, the present invention obtains module 30 and be full of-given out light once by lithium battery energy storage battery system, does and once demarcates, the mark
It is real system capability value MC to determine result.
Secondly, obtain module 30 and battery health index SOH, wherein DC are calculated as mark according to formula S OH=MC/DC*100%
Claim capability value.
The determination module 31, it is additionally operable to judge battery health index SOH whether less than default health value.
The battery health index SOH that determination module 31 is calculated according to acquisition module 30 is compared with default health value
Compared with.
If less than default health value, illustrate that the power system capacity of the lithium battery energy storage battery system is unqualified.
If greater than default health value, illustrate that the power system capacity of the lithium battery energy storage battery system is qualified.
The comparison module 12, the capacity attenuation slope of the capacity history curve of the different battery cells of comparison is additionally operable to, and
To be replaced battery cell of the capacity attenuation slope different from the capacity attenuation slope of remaining battery cell is obtained, it is described to treat more
The battery capacity for changing battery cell is small.
When the power system capacity of the lithium battery energy storage battery system is unqualified, comparison module 12 compares in the lithium battery energy storage battery system
The capacity attenuation slope of the capacity history curve of each battery cell, i.e. slope of a curve.
Comparison module 12 obtains battery of the capacity attenuation slope different from the capacity attenuation slope of remaining battery cell being present
Monomer, the battery cell are battery cell to be replaced.
The present invention quickly judges whether current lithium battery energy storage battery system is qualified by battery health index SOH.
If qualified, the judgement of next lithium battery energy storage battery system is carried out, reached quickening is to lithium battery energy storage battery system
No qualified judgement.
If unqualified, the capacity attenuation slope of the capacity history curve of more different battery cells, capacity attenuation is rejected
Slope is same as the battery cell of the capacity attenuation slope of remaining battery cell, it is ensured that the battery health index of lithium battery energy storage battery system
SOH is greater than or equal to default health value.
The embodiment of invention is described in detail above, but it is only used as example, and the present invention is not intended to limit
With specific embodiments described above.For a person skilled in the art, any equivalent modifications carried out to the invention
Or substitute also all among scope of the invention, therefore, the equalization made in the case where not departing from the spirit and principles in the present invention scope
Conversion and modification, improvement etc., all should be contained within the scope of the invention.
Claims (6)
1. a kind of lithium battery energy storage battery power system capacity declines analysis and processing method, it is characterised in that it comprises the following steps：
Magnitude of voltage, temperature value and the capability value of lithium battery energy storage battery system each battery cell in the process of running are recorded, and will
The magnitude of voltage, temperature value and capability value are stored into database；
Extract in lithium battery energy storage battery system in each identical charge cycle of battery cell preset number and identical discharge cycle
Magnitude of voltage, temperature value and capability value, voltage history curve, Temperature history and the capacity for generating each battery cell are gone through
History curve；
Compare voltage history curve, Temperature history of the different battery cells in identical charge cycle or identical discharge cycle
Or capacity history curve, it is determined that causing the battery cell that power system capacity declines；
Voltage history curve, Temperature history of the more different battery cells in identical charge cycle or discharge cycle
Or capacity history curve, it is determined that the step of causing the battery cell that power system capacity declines, including：
Compare the voltage rate of rise of voltage history curve of the different battery cells in identical charge cycle or identical electric discharge week
The voltage descending slope of voltage history curve in phase；
Obtain the voltage rate of rise or voltage descending slope is different from the voltage rate of rise or electricity of remaining battery cell
Depress the battery cell to be replaced of drop angle rate；
Judge whether the voltage history curve of the battery cell difference charge cycle to be replaced or discharge cycle is identical；
If identical, the initial capacity of the battery cell to be replaced is small；
Battery capacity is caused to decline if it is different, the battery cell consume to be replaced is excessive.
2. lithium battery energy storage battery power system capacity according to claim 1 declines analysis and processing method, it is characterised in that the note
Record magnitude of voltage, temperature value and the capability value of lithium battery energy storage battery system each battery cell in the process of running, and by the electricity
Before pressure value, temperature value and capability value store the step into database, including：
The equalization function of lithium battery energy storage battery system is opened, so that a battery cell in lithium battery energy storage battery system reaches cut-off electricity
After pressure, lithium battery energy storage battery system continues charge or discharge.
3. a kind of lithium battery energy storage battery power system capacity declines analysis processing device, it is characterised in that it includes：
Logging modle, for magnitude of voltage, temperature value and the appearance of lithium battery energy storage battery system each battery cell in the process of running
Value, and the magnitude of voltage, temperature value and capability value are stored into database；
Extraction module, for extracting each battery cell identical charge cycle of preset number and phase in lithium battery energy storage battery system
With the magnitude of voltage in discharge cycle, temperature value and capability value, voltage history curve, the temperature history of each battery cell are generated
Curve and capacity history curve；
Comparison module, it is bent for voltage history of the more different battery cells in identical charge cycle or identical discharge cycle
Line, Temperature history or capacity history curve, it is determined that causing the battery cell that power system capacity declines；
It also includes obtaining module and determination module；
The comparison module, it is additionally operable on the voltage of voltage history curve of the different battery cells of comparison in identical charge cycle
Rise the voltage descending slope of slope or the voltage history curve in identical discharge cycle；
Module is obtained, is different from the voltage of remaining battery cell for obtaining the voltage rate of rise or voltage descending slope
The battery cell to be replaced of the rate of rise or voltage descending slope；
Determination module, for judging that the voltage history curve of the battery cell difference charge cycle to be replaced or discharge cycle is
No identical, if identical, the initial capacity of the battery cell to be replaced is small, if it is different, the battery cell to be replaced consumed
Battery capacity is caused to decline greatly.
4. lithium battery energy storage battery power system capacity according to claim 3 declines analysis processing device, it is characterised in that it is also wrapped
Include：
Balance module, for opening the equalization function of lithium battery energy storage battery system, so that a battery in lithium battery energy storage battery system
After monomer reaches blanking voltage, lithium battery energy storage battery system continues charge or discharge.
5. lithium battery energy storage battery power system capacity according to claim 3 declines analysis processing device, it is characterised in that
The comparison module, it is bent to be additionally operable to temperature history of the different battery cells of comparison in identical charge cycle or discharge cycle
The temperature rate of rise of line；
The acquisition module, it is additionally operable to obtain the temperature rate of rise that the temperature rate of rise is different from remaining battery cell
Battery cell to be replaced, the battery cell to be replaced is that Energy Efficiency Ratio is low.
6. lithium battery energy storage battery power system capacity according to claim 3 declines analysis processing device, it is characterised in that
The acquisition module, it is additionally operable to obtain the real system capability value MC of lithium battery energy storage battery system, and according to formula S OH=
It is nominal capacity value that MC/DC*100%, which calculates battery health index SOH, wherein DC,；
The determination module, it is additionally operable to judge battery health index SOH whether less than default health value；
The comparison module, is additionally operable to the capacity attenuation slope of the capacity history curve of the different battery cells of comparison, and obtains institute
State to be replaced battery cell of the capacity attenuation slope different from the capacity attenuation slope of remaining battery cell, the battery to be replaced
The battery capacity of monomer is small.
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| CN201410844008.6A CN104597406B (en) | 2014-12-30 | 2014-12-30 | Lithium battery energy storage battery power system capacity declines analysis and processing method and analysis processing device |
| PCT/CN2015/088100 WO2016107198A1 (en) | 2014-12-30 | 2015-08-26 | Method and device for analyzing and processing capacity drop of lithium battery energy storage system |
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| CN201410844008.6A CN104597406B (en) | 2014-12-30 | 2014-12-30 | Lithium battery energy storage battery power system capacity declines analysis and processing method and analysis processing device |
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| CN104597406B (en) * | 2014-12-30 | 2017-11-28 | 深圳市科陆电子科技股份有限公司 | Lithium battery energy storage battery power system capacity declines analysis and processing method and analysis processing device |
| CN105021997B (en) * | 2015-08-07 | 2018-03-27 | 中国人民解放军重庆通信学院 | The method for drafting and device of accumulator capacity curve |
| CN105610209B (en) * | 2015-10-21 | 2018-05-04 | 金龙联合汽车工业（苏州）有限公司 | A kind of passive equalization methods of battery pack |
| CN106707183A (en) * | 2016-12-09 | 2017-05-24 | 国网北京市电力公司 | Method and device for discharge test of storage battery |
| CN106842035A (en) * | 2016-12-09 | 2017-06-13 | 国网北京市电力公司 | Data processing method and device for determining batteries discharge capability |
| CN106848464A (en) * | 2016-12-29 | 2017-06-13 | 东莞钜威动力技术有限公司 | A kind of battery balanced estimation algorithm and battery management system |
| KR102543921B1 (en) | 2017-04-17 | 2023-06-19 | 더 리젠츠 오브 더 유니버시티 오브 미시건 | Method for estimating battery life for a mobile device based on relaxation voltages |
| CN111199104B (en) * | 2019-12-31 | 2024-04-16 | 浙江吉利新能源商用车集团有限公司 | Battery residual performance analysis method, device, equipment and storage medium |
| CN112895976B (en) * | 2021-02-01 | 2022-06-24 | 重庆峘能电动车科技有限公司 | Battery cell early warning protection method and system |
| CN113985290A (en) * | 2021-10-29 | 2022-01-28 | 东莞市创明电池技术有限公司 | Battery capacity grading method and device |
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