CN107765188A - Cell health state acquisition methods - Google Patents
Cell health state acquisition methods Download PDFInfo
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- CN107765188A CN107765188A CN201711218212.7A CN201711218212A CN107765188A CN 107765188 A CN107765188 A CN 107765188A CN 201711218212 A CN201711218212 A CN 201711218212A CN 107765188 A CN107765188 A CN 107765188A
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- 230000036541 health Effects 0.000 title claims abstract description 185
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000003862 health status Effects 0.000 claims abstract description 67
- 230000005611 electricity Effects 0.000 claims abstract description 55
- 238000012937 correction Methods 0.000 claims description 52
- 238000007600 charging Methods 0.000 claims description 47
- 238000004364 calculation method Methods 0.000 claims description 35
- 238000007599 discharging Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
- 238000010291 electrical method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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Abstract
Cell health state acquisition methods, comprise the following steps：Step S01：The currently stored cell health state value of battery is obtained, as cell health state initial value；Step S02：Battery current residual electricity value and current temperature value are gathered, is inquired about to obtain minimum state-of-charge trigger value and highest state-of-charge trigger value according to current residual electricity value, current temperature value；Step S03：Judge the mode of operation of battery；If battery is under charge mode, step S04 is performed；If battery is under discharge mode, step S05 is performed.The present invention can combine actual battery operating mode, obtain the cell health state calculated value of battery, and amendment for the first time is carried out to cell health state calculated value and is corrected for the second time, cell health state actual value that is more accurate, more accurate and can more reflecting the actual health status of battery is obtained with this, reliable guarantee is brought for the actual motion work of battery.
Description
Technical field
The present invention relates to field of batteries, more particularly to a kind of cell health state acquisition methods.
Background technology
In electric vehicle engineering field, cell health state (SOH) directly influences the practicality of power battery pack, economy
Property and security, therefore producer increasingly payes attention to the research to power battery pack cell health state.Due to automobile power cell
Group is made up of multiple cells by connection in series-parallel, therefore during the use of power battery pack, can not ensure own
Cell is completely the same, along with cell itself the charge-discharge electric power also reasons such as different, causes power battery pack
Capacity is gradually decayed, and influences the distance travelled of electric automobile.Battery charge state (SOC) can only tell user's electricity residue percentage
Than, it is impossible to the dump energy that user is definite is told, therefore can not fast and accurately estimate the cell health state of power battery pack.
This for driver it is accurate understand power battery pack dump energy, estimate mileage and avoid electric automobile because of electricity not
Sufficient halfway is forced parking and generates severe jamming.
At present, the evaluation method of the cell health state of electrokinetic cell mainly has three classes.First, complete electric discharge, puts completely
Electrical method is under the conditions of being based on offline, electric discharge completely is carried out to power battery pack cell health state is estimated.Defect is
Test load is heavy, operation inconvenience；And in estimation process, complete electric discharge can cause one to the service life of power battery pack
It is fixing to ring.2nd, internal resistance estimation algorithm, cell health state is entered using the corresponding relation between cell health state and the internal resistance of cell
Row estimation.Defect is the small-signal of internal resistance of cell very little, usually milliohm level, but internal resistance and cell health state are not formed
Linear relationship, change in the scope that electrokinetic cell pool-size is reduced to before 80% little, it is desirable to which the accurate measurement internal resistance of cell also compares
More difficult, accuracy is poor.3rd, electrochemical model method, the reaction that electrochemical model method is occurred by analyzing inside battery, builds
Vertical electrochemical model, the decay of capacity is calculated according to model.Defect is that needs establish model by largely experiment, tests number
Grown according to test period, estimation result error is big.
Therefore, how quickly, accurately the health status of estimation electrokinetic cell is enterprise's technical problem urgently to be resolved hurrily.
The content of the invention
The purpose of the present invention is to overcome weak point of the prior art, there is provided one kind can quickly, accurately obtain battery
Health status acquisition methods.
The purpose of the present invention is achieved through the following technical solutions：
Cell health state acquisition methods, comprise the following steps：
Step S01：The currently stored cell health state value of battery is obtained, as cell health state initial value；
Step S02：The battery current residual electricity value and current temperature value are gathered, according to the current residual electricity
Value, current temperature value inquire about to obtain minimum state-of-charge trigger value and highest state-of-charge trigger value；
Step S03：Judge the mode of operation of the battery, if the battery is under charge mode, perform step S04；
If the battery is under discharge mode, step S05 is performed；
If the battery is in non-charging mode and absence of discharge pattern, maintain presently described cell health state initial
It is worth constant and returns and perform step S01；
Step S04：When the current residual electricity value and the minimum state-of-charge trigger value meet the first default triggering
During relation, then accumulative calculation of capacity operation of charging is carried out to the battery, when the current residual electricity value and the highest lotus
When electricity condition value meets the first preset stopping relation, then stop the accumulative calculation of capacity operation of charging to the battery, and record institute
Charging mean temperature of the battery under charge mode is stated, inquires about the discharge and recharge coefficient table of the battery, obtains the mean temperature that charges
Correction factor, charging correction factor and rated capacity, and according to the preset charged mode function relation of the battery, obtain described
The rechargeable battery health status calculated value of battery；
As rechargeable battery health status calculated value>When=100%, then cell health state actual value=battery health shape
State initial value；
When rechargeable battery health status calculated value>During cell health state initial value, then cell health state actual value=
Cell health state initial value；
When cell health state initial value-rechargeable battery health status calculated value>During=calibration value, then cell health state
Actual value=cell health state initial value-calibration value；
When cell health state initial value-rechargeable battery health status calculated value<During calibration value, then cell health state is real
Actual value=rechargeable battery health status calculated value；
Return and perform step S01；
Step S05：When the current residual electricity value and the highest state-of-charge trigger value meet the second default triggering
During relation, then accumulative calculation of capacity of discharging is carried out to the battery, when the current residual electricity value and the minimum charged shape
When state value meets the second preset stopping relation, then stop the accumulative calculation of capacity operation of electric discharge to the battery, and record the electricity
Electric discharge mean temperature of the pond under discharge mode, the discharge and recharge coefficient table of the battery is inquired about, obtain mean temperature amendment of discharging
Coefficient, electric discharge correction factor and rated capacity, and according to the default discharge mode functional relation for stating battery, obtain the battery
Discharge health status calculated value；
As discharge battery health status calculated value>When=100%, cell health state actual value=cell health state
Initial value；
When discharge battery health status calculated value>During cell health state initial value, then cell health state actual value=
Cell health state initial value；
When cell health state initial value-discharge battery health status calculated value>During=calibration value, then cell health state
Actual value=cell health state initial value-calibration value；
When cell health state initial value-discharge battery health status calculated value<During calibration value, then cell health state is real
Actual value=discharge battery health status calculated value；
Return and perform step S01.
In one of the embodiments, the described first default triggering be the current residual electricity value be equal to it is described most
Low state-of-charge trigger value.
In one of the embodiments, the first preset stopping relation be the current residual electricity value be equal to it is described most
Highly charged state trigger value.
In one of the embodiments, the described second default triggering be the current residual electricity value be equal to it is described most
Highly charged state trigger value.
In one of the embodiments, the step S04 also includes：
When to the battery charge accumulative calculation of capacity operation,
If the battery is transformed into the calculating of discharge mode or the accumulative calculation of capacity operation of the charging from charge mode
Duration is more than setting value, then stops carrying out the battery the accumulative calculation of capacity operation of charging, and empty the accumulative appearance of charging
Measure calculated value and return to execution step S01.
In one of the embodiments, the step S05 also includes：
When to the battery discharge accumulative calculation of capacity operation,
If the battery is transformed into the calculating of charge mode or the accumulative calculation of capacity operation of the electric discharge from discharge mode
Duration is more than setting value, then stops carrying out the battery the accumulative calculation of capacity operation of the electric discharge, and it is tired to empty the electric discharge
Count calculation of capacity value and return to execution step S01.
In one of the embodiments, the second preset stopping relation be the current residual electricity value be equal to it is described most
Low state-of-charge trigger value.
In one of the embodiments, the preset charged mode function relation be rechargeable battery health status calculated value=
Charge accumulative capacity/[(the highest state-of-charge trigger value-minimum charged of correction factor * charging mean temperature correction factor * chargings
State trigger value) * rated capacities].
In one of the embodiments, the default discharge mode functional relation be discharge battery health status calculated value=
Discharge accumulative capacity/[(the highest state-of-charge trigger value-minimum charged of correction factor * electric discharge mean temperature correction factor * electric discharges
State trigger value) * rated capacities].
In one of the embodiments, the step S04 and the step S05 also include：
Data progress trend prediction is calculated according to history and obtains cell health state predicted value, according to the battery health shape
State predicted value and the cell health state calculated with actual values difference percentage, difference percentage=(cell health state is predicted
Value-cell health state actual value)/cell health state predicted value；
The trend correction factor according to corresponding to difference percentage tables look-up to obtain；The cell health state actual value is carried out
Amendment；
Revised cell health state actual value=trend prediction correction factor * cell health state actual values.
In one of the embodiments, the calibration value is 1%.
In one of the embodiments, the setting value is 3 hours.
This technical scheme has following beneficial effect compared to prior art：
The present invention can combine actual battery operating mode, and the battery health of battery is directly obtained in vehicle normal operation environment
State computation value, and amendment for the first time and second is carried out to cell health state calculated value and is corrected, with this obtain it is more accurate,
Cell health state actual value that is more accurate and can more reflecting the actual health status of battery, it is that the actual motion of battery works
Bring reliable guarantee.
Brief description of the drawings
Fig. 1 is the schematic flow sheet that the cell health state in the present embodiment obtains.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure
Add thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more
The arbitrary and all combination of related Listed Items.
It is the schematic flow sheet of cell health state acquisition methods as shown in Figure 1, comprises the following steps：
Step S01：The currently stored cell health state value of battery is obtained, as cell health state initial value；
Step S02：The battery current residual electricity value and current temperature value are gathered, according to the current residual electricity
Value, current temperature value inquire about to obtain minimum state-of-charge trigger value and highest state-of-charge trigger value；
Step S03：Judge the mode of operation of the battery, if the battery is under charge mode, perform step S04；
If the battery is under discharge mode, step S05 is performed；
If the battery is in non-charging mode and absence of discharge pattern, maintain presently described cell health state initial
It is worth constant and returns and perform step S01；
Step S04：When the current residual electricity value and the minimum state-of-charge trigger value meet the first default triggering
During relation, then accumulative calculation of capacity operation of charging is carried out to the battery, when the current residual electricity value and the highest lotus
When electricity condition value meets the first preset stopping relation, then stop the accumulative calculation of capacity operation of charging to the battery, and record institute
Charging mean temperature of the battery under charge mode is stated, inquires about the discharge and recharge coefficient table of the battery, obtains the mean temperature that charges
Correction factor, charging correction factor and rated capacity, and according to the preset charged mode function relation of the battery, obtain described
The rechargeable battery health status calculated value of battery；
As rechargeable battery health status calculated value>When=100%, then cell health state actual value=battery health shape
State initial value；
When rechargeable battery health status calculated value>During cell health state initial value, then cell health state actual value=
Cell health state initial value；
When cell health state initial value-rechargeable battery health status calculated value>During=calibration value, then cell health state
Actual value=cell health state initial value-calibration value；
When cell health state initial value-rechargeable battery health status calculated value<During calibration value, then cell health state is real
Actual value=rechargeable battery health status calculated value；
Return and perform step S01；
Step S05：When the current residual electricity value and the highest state-of-charge trigger value meet the second default triggering
During relation, then accumulative calculation of capacity of discharging is carried out to the battery, when the current residual electricity value and the minimum charged shape
When state value meets the second preset stopping relation, then stop the accumulative calculation of capacity operation of electric discharge to the battery, and record the electricity
Electric discharge mean temperature of the pond under discharge mode, the discharge and recharge coefficient table of the battery is inquired about, obtain mean temperature amendment of discharging
Coefficient, electric discharge correction factor and rated capacity, and according to the default discharge mode functional relation for stating battery, obtain the battery
Discharge health status calculated value；
As discharge battery health status calculated value>When=100%, then cell health state actual value=battery health shape
State initial value；
When discharge battery health status calculated value>During cell health state initial value, then cell health state actual value=
Cell health state initial value；
When cell health state initial value-discharge battery health status calculated value>During=calibration value, then cell health state
Actual value=cell health state initial value-calibration value；
When cell health state initial value-discharge battery health status calculated value<During calibration value, then cell health state is real
Actual value=discharge battery health status calculated value；
Return and perform step S01.
Specifically, the described first default triggering is that the current residual electricity value is touched equal to the minimum state-of-charge
Hair value.
Specifically, the first preset stopping relation is that the current residual electricity value is touched equal to the highest state-of-charge
Hair value.
Specifically, the described second default triggering is that the current residual electricity value is touched equal to the highest state-of-charge
Hair value.
Specifically, the step S04 also includes：
When to the battery charge accumulative calculation of capacity operation,
If the battery is transformed into the calculating of discharge mode or the accumulative calculation of capacity operation of the charging from charge mode
Duration is more than setting value, then stops carrying out the battery the accumulative calculation of capacity operation of charging, and empty the accumulative appearance of charging
Measure calculated value and return to execution step S01.
Specifically, the step S05 also includes：
When to the battery discharge accumulative calculation of capacity operation,
If the battery is transformed into the calculating of charge mode or the accumulative calculation of capacity operation of the electric discharge from discharge mode
Duration is more than setting value, then stops carrying out the battery the accumulative calculation of capacity operation of the electric discharge, and it is tired to empty the electric discharge
Count calculation of capacity value and return to execution step S01.
Specifically, the second preset stopping relation is that the current residual electricity value is touched equal to the minimum state-of-charge
Hair value.
Specifically, the preset charged mode function relation is rechargeable battery health status calculated value=charging amendment system
The accumulative capacity of number * charging mean temperature correction factor * chargings/[(highest state-of-charge trigger value-minimum state-of-charge triggering
Value) * rated capacities].
Specifically, the default discharge mode functional relation is discharge battery health status calculated value=electric discharge amendment system
The accumulative capacity of number * electric discharge mean temperature correction factor * electric discharges/[(highest state-of-charge trigger value-minimum state-of-charge triggering
Value) * rated capacities].
Specifically, the step S04 and the step S05 also include：
Data progress trend prediction is calculated according to history and obtains cell health state predicted value, according to the battery health shape
State predicted value and the cell health state calculated with actual values difference percentage, difference percentage=(cell health state is predicted
Value-cell health state actual value)/cell health state predicted value；
The trend correction factor according to corresponding to difference percentage tables look-up to obtain；
The cell health state actual value is modified；
Revised cell health state actual value=trend prediction correction factor * cell health state actual values.
Further, the calibration value is 1%.
Further, the setting value is 3 hours.
Concrete operating principle is as follows：
SOC, full name are State of Charge, state-of-charge, are also dump energy, representative is that battery uses one section
Time or it is long-term lie idle after residual capacity and the ratio of the capacity of its fully charged state, commonly use percentage and represent.Its
Span is 0~1, represents that battery discharge is complete as SOC=0, represents that battery is completely filled with as SOC=1.
SOH(Section Of Health)：Accumulator capacity, health degree, performance state, i.e. battery completely fill capacity phase
To the percentage of rated capacity, the battery that newly dispatches from the factory is 100%, it is considered that is to scrap state when being reduced to 80%
Step S01：The current cell health state value (SOH) of battery is obtained, as cell health state initial value
(SOHraw)。
Step S02：Battery current residual electricity value (SOC) and current temperature value (T) are gathered, according to current residual electricity value
(SOC), current temperature value (T) inquiry obtains minimum state-of-charge trigger value (SOCL) and highest state-of-charge trigger value (SOCH)。
It should be noted that when gathering battery current residual electricity value (SOC), pass through spreading kalman algorithm and ampere-hour
Integral algorithm, battery current residual electricity value (SOC) is obtained, statistics battery is under current temperature value (T) and present battery is actual
The corresponding relation of capability value (Q).Using normalization algorithm to current residual electricity value (SOC), current temperature value (T) and current
Battery actual capacity value (Q) carry out data fitting test, draw with idealization battery condition under current residual electricity value (SOC) with
The currently practical immediate current residual electricity value triggering section of capability value (Q) linear relationship, this current residual electricity value is touched
The minimum value in hair section is defined as minimum state-of-charge trigger value (SOCL), maximum is defined as highest state-of-charge trigger value
(SOCH)。
Make it should also be noted that, obtaining current residual electricity value by spreading kalman algorithm, ampere-hour integral algorithm and sitting
For reference index, the accuracy of reference index is ensure that, avoiding voltage pulsation under different battery operating modes influences, unreal by battery
The limitation of border operating mode, without standing.Again by being fitted test to the data of battery, cutting edge aligned optimal current residual electricity value is obtained
Section is triggered, it is overall with local reaction, ensure the validity of triggering.
Step S03：
Judge the mode of operation of battery；
When battery is under charge mode, step S04 is performed；
When battery is under discharge mode, step S05 is performed；
When battery is under non-charging mode and absence of discharge pattern, then present battery health status initial value is maintained
(SOHraw) constant and return and perform step S01.
Step S04：
When current residual electricity value (SOC) and minimum state-of-charge trigger value (SOCL) it is equal to the first default triggering
When, then accumulative capacity (the △ Q that charge are carried out to battery1) operation is calculated, when current residual electricity value (SOC) and highest state-of-charge
It is worth (SOCH) when being equal to the first preset stopping relation, then stop accumulative capacity (the △ Q of charging to battery1) operation is calculated, and record electricity
Pond under charge mode charging mean temperature (cTavg), the discharge and recharge coefficient table of battery is inquired about, charging mean temperature is obtained and repaiies
Positive coefficientckt, charging correction factor (cλ) and rated capacity (Ce), and according to the preset charged mode function relation of battery, obtain
Battery rechargeable battery health status calculated value (cSOHcalc)；
Preset charged mode function relation：
The rechargeable battery health status calculated value=accumulative appearance of charging correction factor * charging mean temperature correction factor * chargings
Amount/[(highest state-of-charge trigger value-minimum state-of-charge trigger value) * rated capacities]；
When rechargeable battery health status calculated value (cSOHcalc)>When=100%, then cell health state actual value
(SOHactu)=cell health state initial value (SOHraw)；
When rechargeable battery health status calculated value (cSOHcalc)>Cell health state initial value (SOHraw) when, then battery is good for
Health state actual value (SOHactu)=cell health state initial value (SOHraw)；
As cell health state initial value (SOHraw)-rechargeable battery health status calculated value (cSOHcalc)>=calibration value
When, then cell health state actual value (SOHactu)=cell health state initial value (SOHraw)-calibration value；
As cell health state initial value (SOHraw)-rechargeable battery health status calculated value (cSOHcalc)<During calibration value,
Then cell health state actual value (SOHactu)=rechargeable battery health status calculated value (cSOHcalc)；
Return and perform step S01.
It is battery when dispatching from the factory sale it should be noted that discharge and recharge coefficient table, official's battery that battery seller provides
Discharge and recharge coefficient table, in the present embodiment, using battery seller provide official's battery charging and discharging coefficient table, using
Recorded in charge mode charging mean temperature (cTavg), find charging mean temperature (cTavg) battery under corresponding relation fills
Discharge coefficient table, obtain the mean temperature correction factor that chargesckt, charging correction factor (cλ) and rated capacity (Ce), utilize charging
Mean temperature correction factorckt, charging correction factor (cλ) and rated capacity (Ce), with reference to the preset charged mode function of battery
Relation, obtain first time revised cell health state calculated value (SOH under charge modecalc), it is defined as rechargeable battery and is good for
Health state computation value (dSOHcalc)。
It should be noted that in the prior art, calculation formula=Q of cell health state valueAlways/CeAlthough this formula
Cell health state calculated value (SOH can be obtainedcalc), but operating mode is complicated during vehicle actual motion, it is difficult to be protected from full power state
Steady working condition continuous discharge is held to being vented, is also seldom started to charge up from complete out of power to full of therefore battery total capacity QAlwaysIt is not easy
Calculate, and do not combine the actual condition of battery fully to cell health state calculated value (SOHcalc) carry out related amendment.
For example, battery is in charge mode or discharge mode also or non-charging mode and absence of discharge pattern, reality is also not bound with
The temperature of present battery is to cell health state calculated value (SOHcalc) accordingly corrected so that the battery health calculated
State computation value (SOHcalc) error be present.And in this technical scheme, the actual condition of battery is fully combined, utilizes battery
Actual condition related correction factor is found by discharge and recharge coefficient table, using correction factor to cell health state calculated value
(SOHcalc) accordingly corrected, obtain more accurate cell health state calculated value (SOHcalc)。
Step S05：
When current residual electricity value (SOC) and highest state-of-charge trigger value (SOCH) it is equal to the second default triggering
When, then accumulative capacity (the △ Q that discharge are carried out to battery2) operation is calculated, when current residual electricity value (SOC) and minimum state-of-charge
It is worth (SOCL) when being equal to the second preset stopping relation, then stop accumulative capacity (the △ Q of electric discharge to battery2) operation is calculated, and record electricity
Pond under discharge mode electric discharge mean temperature (dTavg), the discharge and recharge coefficient table of battery is inquired about, electric discharge mean temperature is obtained and repaiies
Positive coefficientdkt, electric discharge correction factor (dλ) and rated capacity (Ce), and according to the default discharge mode functional relation of battery, obtain
Battery discharge battery health status calculated value (dSOHcalc)；
Default discharge mode functional relation：
The discharge battery health status calculated value=accumulative appearance of electric discharge correction factor * electric discharge mean temperature correction factor * electric discharges
Amount/[(highest state-of-charge trigger value-minimum state-of-charge trigger value) * rated capacities]；
When discharge battery health status calculated value (dSOHcalc)>When=100%, then cell health state actual value
(SOHactu)=cell health state initial value (SOHraw)；
When discharge battery health status calculated value (dSOHcalc)>Cell health state initial value (SOHraw) when, then battery is good for
Health state actual value (SOHactu)=cell health state initial value (SOHraw)；
As cell health state initial value (SOHraw)-discharge battery health status calculated value (dSOHcalc)>=calibration value
When, then cell health state actual value (SOHactu)=cell health state initial value (SOHraw)-calibration value；
As cell health state initial value (SOHraw)-discharge battery health status calculated value (dSOHcalc)<During calibration value,
Then cell health state actual value (SOHactu)=discharge battery health status calculated value (dSOHcalc)；
Return and perform step S01.
It should be noted that in discharge mode, need also exist for reference to actual battery operating mode to cell health state meter
Calculation value (SOHcalc) accordingly corrected.It is consistent with the amendment principle of charge mode to correct principle.Utilize mean temperature of discharging
(dTavg) by searching discharge and recharge coefficient table, find corresponding electric discharge mean temperature (dTavg) under electric discharge mean temperature correction factordkt, electric discharge correction factor (dλ) and rated capacity (Ce), according to electric discharge mean temperature correction factordkt, electric discharge correction factor (dλ)
With rated capacity (Ce), with reference to the default discharge mode functional relation of battery, obtain revised for the first time under discharge mode
Cell health state calculated value (SOHcalc), be defined as discharge battery health status calculated value (dSOHcalc)。
It needs to be emphasized that preferably, no matter under charge mode or discharge mode, it is required to
To cell health state actual value (SOHactu) carry out second of amendment operation.Become specifically, calculating data according to history
Gesture is predicted to obtain cell health state predicted value (SOHpre), according to cell health state predicted value (SOHpre) and battery health shape
State actual value (SOHactu) calculate difference percentage relation obtain trend correction factor (δ)；
It is according to difference percentage：(cell health state predicted value-cell health state actual value)/cell health state
Predicted value, table look-up to obtain corresponding trend correction factor.When difference percentage is 10%, corresponding trend correction factor δ=
1.07；When difference percentage is 5%, corresponding trend correction factor is 1.03；When difference percentage is -10%, correspond to
Gesture correction factor is 0.94；When difference percentage is -5%, corresponding correction factor is 0.97.It needs to be emphasized that by
It is limited in the data volume of form, it is impossible to which that each difference percentage corresponds to a trend correction factor, the excessive Pang of data volume
Conference, which reduces, performs speed.Therefore, preferably, when the difference percentage being calculated is 7.1%, difference is utilized
Two points that value percentage is 5% and difference percentage is 10% are calculated difference percentage by linear difference method and are
7.1% trend correction factor, specifically, difference percentage is 7.1% trend correction factor=(7.1%-5%) *
(1.07-1.03)/(10%-5%)+1.03, it is trend corresponding to 7.1% to obtain difference percentage indirectly using linear difference method
Correction factor.
Difference percentage=(cell health state predicted value-cell health state actual value)/cell health state prediction
Value；
Second is carried out to cell health state actual value to correct；
Second of revised cell health state actual value=trend prediction correction factor * cell health state is actual
Value.
It should be noted that in step S04 and step S05, by rechargeable battery health status calculated value
(cSOHcalc) or discharge battery health status calculated value (dSOHcalc) first time amendment is carried out, obtain cell health state
Actual value (SOHactu).But this cell health state actual value (SOHactu) it still there may be certain accidental error, i.e. battery
In actual application, battery operating mode is changing at any time, operating mode rather unstable, causes revised battery for the first time and is good for
Health state actual value (SOHactu) it still there may be accidental error.In order to eliminate this accidental error, after being corrected to first time
Battery health actual value (SOHactu) second of amendment operation is carried out, obtain more fine and more accurate battery health shape
State actual value (SOHactu), with second of revised cell health state actual value (SOHactu) it is used as final battery health shape
The display result of state value informs car owner so that car owner can be according to second of revised cell health state actual value
(SOHactu) judge the actual health status of present battery.
It should also be noted that, preferably, no matter be still in discharge mode, setting value in charge mode
3 hours.It is of course possible to combine the actual situation of battery, setting value is adjusted accordingly.
It should also be noted that, preferably, calibration value 1%.It is of course possible to combine the actual feelings of battery
Condition, calibration value is adjusted accordingly.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (12)
1. cell health state acquisition methods, it is characterised in that comprise the following steps：
Step S01：The currently stored cell health state value of battery is obtained, as cell health state initial value；
Step S02：Gather the battery current residual electricity value and current temperature value, according to the current residual electricity value, when
Preceding temperature value is inquired about to obtain minimum state-of-charge trigger value and highest state-of-charge trigger value；
Step S03：Judge the mode of operation of the battery；
If the battery is under charge mode, step S04 is performed；
If the battery is under discharge mode, step S05 is performed；
If the battery is in non-charging mode and absence of discharge pattern, presently described cell health state initial value is maintained not
Become and return and perform step S01；
Step S04：When the current residual electricity value and the minimum state-of-charge trigger value meet the first default triggering
When, then accumulative calculation of capacity operation of charging is carried out to the battery, when the current residual electricity value and the charged shape of the highest
When state value meets the first preset stopping relation, then stop the accumulative calculation of capacity operation of charging to the battery, and record the electricity
Charging mean temperature of the pond under charge mode, the discharge and recharge coefficient table of the battery is inquired about, obtain mean temperature amendment of charging
Coefficient, charging correction factor and rated capacity, and according to the preset charged mode function relation of the battery, obtain the battery
Rechargeable battery health status calculated value；
As rechargeable battery health status calculated value>When=100%, then at the beginning of cell health state actual value=cell health state
Initial value；
When rechargeable battery health status calculated value>During cell health state initial value, then cell health state actual value=battery
Health status initial value；
When cell health state initial value-rechargeable battery health status calculated value>During=calibration value, then cell health state is actual
Value=cell health state initial value-calibration value；
When cell health state initial value-rechargeable battery health status calculated value<During calibration value, then cell health state actual value
=rechargeable battery health status calculated value；
Return and perform step S01；
Step S05：When the current residual electricity value and the highest state-of-charge trigger value meet the second default triggering
When, then accumulative calculation of capacity of discharging is carried out to the battery, when the current residual electricity value and the minimum SOC
When meeting the second preset stopping relation, then stop the accumulative calculation of capacity operation of electric discharge to the battery, and record the battery and exist
Electric discharge mean temperature under discharge mode, the discharge and recharge coefficient table of the battery is inquired about, the mean temperature correction factor of obtaining discharging,
Electric discharge correction factor and rated capacity, and according to the default discharge mode functional relation for stating battery, obtain the electric discharge of the battery
Health status calculated value；
As discharge battery health status calculated value>When=100%, then at the beginning of cell health state actual value=cell health state
Initial value；
When discharge battery health status calculated value>During cell health state initial value, then cell health state actual value=battery
Health status initial value；
When cell health state initial value-discharge battery health status calculated value>During=calibration value, then cell health state is actual
Value=cell health state initial value-calibration value；
When cell health state initial value-discharge battery health status calculated value<During calibration value, then cell health state actual value
=discharge battery health status calculated value；
Return and perform step S01.
2. cell health state acquisition methods according to claim 1, it is characterised in that the described first default triggering
It is equal to the minimum state-of-charge trigger value for the current residual electricity value.
3. cell health state acquisition methods according to claim 1, it is characterised in that the first preset stopping relation
It is equal to the highest state-of-charge trigger value for the current residual electricity value.
4. cell health state acquisition methods according to claim 1, it is characterised in that the described second default triggering
It is equal to the highest state-of-charge trigger value for the current residual electricity value.
5. cell health state acquisition methods according to claim 1, it is characterised in that the step S04 also includes：
When to the battery charge accumulative calculation of capacity operation, if the battery is transformed into discharge mode from charge mode
Or the calculating duration of the accumulative calculation of capacity operation of charging is more than setting value, then stops carrying out the charging to the battery
Accumulative calculation of capacity operation, and empty the accumulative calculation of capacity value return of charging and perform step S01.
6. cell health state acquisition methods according to claim 1, it is characterised in that the step S05 also includes：
When to the battery discharge accumulative calculation of capacity operation,
If the battery is transformed into charge mode or the calculating duration of the accumulative calculation of capacity operation of the electric discharge from discharge mode
More than setting value, then stop carrying out the battery the accumulative calculation of capacity operation of discharging, and empty the accumulative appearance of the electric discharge
Measure calculated value and return to execution step S01.
7. cell health state acquisition methods according to claim 1, it is characterised in that the second preset stopping relation
It is equal to the minimum state-of-charge trigger value for the current residual electricity value.
8. cell health state acquisition methods according to claim 1, it is characterised in that the preset charged mode function
Relation be rechargeable battery health status calculated value=charging correction factor * charge the accumulative capacity of mean temperature correction factor * chargings/
[(highest state-of-charge trigger value-minimum state-of-charge trigger value) * rated capacities].
9. cell health state acquisition methods according to claim 1, it is characterised in that the default discharge mode function
Relation be discharge battery health status calculated value=electric discharge correction factor * discharge the accumulative capacity of mean temperature correction factor * electric discharges/
[(highest state-of-charge trigger value-minimum state-of-charge trigger value) * rated capacities].
10. cell health state acquisition methods according to claim 1, it is characterised in that the step S04 and the step
Rapid S05 also includes：
Data progress trend prediction is calculated according to history and obtains cell health state predicted value, it is pre- according to the cell health state
Measured value and the cell health state calculated with actual values difference percentage,
Difference percentage=(cell health state predicted value-cell health state actual value)/cell health state predicted value；
The trend correction factor according to corresponding to difference percentage tables look-up to obtain；
The cell health state actual value is modified；
Revised cell health state actual value=trend prediction correction factor * cell health state actual values.
11. cell health state acquisition methods according to claim 1, it is characterised in that the calibration value is 1%.
12. according to the cell health state acquisition methods described in claim 5-6 any one, it is characterised in that the setting
It is worth for 3 hours.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061483A (en) * | 2018-06-28 | 2018-12-21 | 珠海格力电器股份有限公司 | Battery state of health detection method and device, storage medium and processor |
| CN109471042A (en) * | 2018-10-24 | 2019-03-15 | 湖南科霸汽车动力电池有限责任公司 | Quickly judge the method for the distance travelled of battery module in failure nickel-metal hydride battery packet |
| CN109655754A (en) * | 2018-12-14 | 2019-04-19 | 北京匠芯电池科技有限公司 | A kind of cell performance evaluation method based on charging process multidimensional sublevel |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813754A (en) * | 2010-04-19 | 2010-08-25 | 清华大学 | State estimating method for automobile start illumination type lead-acid storage battery |
| CN102445663A (en) * | 2011-09-28 | 2012-05-09 | 哈尔滨工业大学 | A method for estimating the state of health of an electric vehicle battery |
| CN102998626A (en) * | 2011-09-12 | 2013-03-27 | 伊格皮切尔科技有限责任公司 | Systems and methods for determining battery state-of-health |
| CN104635163A (en) * | 2015-01-21 | 2015-05-20 | 广州市香港科大霍英东研究院 | On-line estimation early warning method for SOH (State Of Health) of electric vehicle battery pack |
| CN105866698A (en) * | 2016-05-11 | 2016-08-17 | 安徽锐能科技有限公司 | Battery health state estimation method taking battery consistency into account |
| US20170016961A1 (en) * | 2014-03-07 | 2017-01-19 | Renault S.A.S. | Method for assessing a state of charge of a battery comprising a plurality of cells having a variable range of use of state of charge |
| CN107102263A (en) * | 2016-02-22 | 2017-08-29 | 华为技术有限公司 | Detect method, device and the battery management system of cell health state |
-
2017
- 2017-11-28 CN CN201711218212.7A patent/CN107765188B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813754A (en) * | 2010-04-19 | 2010-08-25 | 清华大学 | State estimating method for automobile start illumination type lead-acid storage battery |
| CN102998626A (en) * | 2011-09-12 | 2013-03-27 | 伊格皮切尔科技有限责任公司 | Systems and methods for determining battery state-of-health |
| CN102445663A (en) * | 2011-09-28 | 2012-05-09 | 哈尔滨工业大学 | A method for estimating the state of health of an electric vehicle battery |
| US20170016961A1 (en) * | 2014-03-07 | 2017-01-19 | Renault S.A.S. | Method for assessing a state of charge of a battery comprising a plurality of cells having a variable range of use of state of charge |
| CN104635163A (en) * | 2015-01-21 | 2015-05-20 | 广州市香港科大霍英东研究院 | On-line estimation early warning method for SOH (State Of Health) of electric vehicle battery pack |
| CN107102263A (en) * | 2016-02-22 | 2017-08-29 | 华为技术有限公司 | Detect method, device and the battery management system of cell health state |
| CN105866698A (en) * | 2016-05-11 | 2016-08-17 | 安徽锐能科技有限公司 | Battery health state estimation method taking battery consistency into account |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061483A (en) * | 2018-06-28 | 2018-12-21 | 珠海格力电器股份有限公司 | Battery state of health detection method and device, storage medium and processor |
| CN109471042A (en) * | 2018-10-24 | 2019-03-15 | 湖南科霸汽车动力电池有限责任公司 | Quickly judge the method for the distance travelled of battery module in failure nickel-metal hydride battery packet |
| CN109655754A (en) * | 2018-12-14 | 2019-04-19 | 北京匠芯电池科技有限公司 | A kind of cell performance evaluation method based on charging process multidimensional sublevel |
| CN109655754B (en) * | 2018-12-14 | 2022-01-07 | 蓝谷智慧(北京)能源科技有限公司 | Battery performance evaluation method based on multi-dimensional grading of charging process |
| KR102517117B1 (en) * | 2019-03-26 | 2023-04-03 | 주식회사 엘지에너지솔루션 | Process of Capacity Calculation Method of Lithium Secondary Battery |
| US11573272B2 (en) * | 2019-03-26 | 2023-02-07 | Lg Energy Solution, Ltd. | Method for calculating process capacity of lithium secondary battery |
| KR20200113762A (en) * | 2019-03-26 | 2020-10-07 | 주식회사 엘지화학 | Process of Capacity Calculation Method of Lithium Secondary Battery |
| CN110133535A (en) * | 2019-06-21 | 2019-08-16 | 阳光电源股份有限公司 | The SOH value of battery system determines method and device |
| CN110133535B (en) * | 2019-06-21 | 2022-04-08 | 阳光电源股份有限公司 | SOH value determination method and device of battery system |
| CN112259813A (en) * | 2020-01-20 | 2021-01-22 | 蜂巢能源科技有限公司 | Battery charging and discharging power determination method, system and device |
| CN112259813B (en) * | 2020-01-20 | 2022-03-29 | 蜂巢能源科技有限公司 | Battery charging and discharging power determination method, system and equipment |
| CN111426973A (en) * | 2020-04-26 | 2020-07-17 | 特瓦特能源科技有限公司 | Battery health state detection method and device |
| CN112698218A (en) * | 2021-01-12 | 2021-04-23 | 广州橙行智动汽车科技有限公司 | Battery health state acquisition method and device and storage medium |
| CN112698218B (en) * | 2021-01-12 | 2024-04-16 | 广州橙行智动汽车科技有限公司 | Battery health state acquisition method and device and storage medium |
| CN113311336A (en) * | 2021-05-11 | 2021-08-27 | 东软睿驰汽车技术（沈阳）有限公司 | Battery cell level capacity evaluation method and device and electronic equipment |
| CN115656845B (en) * | 2022-10-27 | 2023-11-14 | 拓尔微电子股份有限公司 | Method, device, terminal and storage medium for calculating battery electric quantity |
| CN115656845A (en) * | 2022-10-27 | 2023-01-31 | 拓尔微电子股份有限公司 | Battery electric quantity calculation method and device, terminal and storage medium |
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