CN108061865A - The bearing calibration of electric automobile lithium battery capacity and means for correcting - Google Patents
The bearing calibration of electric automobile lithium battery capacity and means for correcting Download PDFInfo
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- CN108061865A CN108061865A CN201711435661.7A CN201711435661A CN108061865A CN 108061865 A CN108061865 A CN 108061865A CN 201711435661 A CN201711435661 A CN 201711435661A CN 108061865 A CN108061865 A CN 108061865A
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- lithium battery
- discharge
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- battery
- discharge curve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
Abstract
The present invention provides a kind of bearing calibration of electric automobile lithium battery capacity, including：Judge whether the electric vehicle is to correct for the first time；In the case where the electric vehicle is non-correction for the first time：The state parameter of the lithium battery of the electric vehicle is obtained, and discharge operation is carried out to the lithium battery based on the state parameter, to obtain the present discharge curve of the lithium battery；By the present discharge curve to obtain power correction factor compared with standard discharge curve, wherein the standard discharge curve is the electric vehicle discharge curve that timing obtains for the first time；The battery capacity of the lithium battery is corrected based on the power correction factor.The present invention also provides a kind of means for correctings of electric automobile lithium battery capacity.The present invention is by being corrected the capacity of lithium battery based on the state parameter of lithium battery, so as to obtain accurate lithium battery capacity to be shown on electric vehicle.
Description
Technical field
The present invention relates to field of automobile control, and in particular to a kind of bearing calibration and one of electric automobile lithium battery capacity
The means for correcting of kind electric automobile lithium battery capacity.
Background technology
With the continuous development of battery technology, power battery is applied on automobile to electric vehicle occur.Make
With in the process, electric energy is exported by lithium battery, electric vehicle is driven so that electric vehicle can utilize the electricity of lithium battery
A certain distance can be travelled.
During electric automobile during traveling, the electric energy in lithium battery constantly consumes, and passes through the residual capacity to lithium battery
It is detected and shows on a display screen, user can be made to know the residual capacity in current lithium battery, electricity is matched with appropriate branch
The use of electrical automobile, such as the distance to be travelled is planned according to remaining capacity.In the prior art, the residue of lithium battery is held
The detection of amount is mainly the voltage swing current by detecting lithium battery, then according to the discharge curve of lithium battery, so as to estimate
Go out the current residual capacity of lithium battery, and the residual capacity of lithium battery is shown by way of percentage.
However in actual application, the prior art at least has following technical problem：1st, in use, lithium electricity
Active material in pond can be consumed constantly, and the capacity of lithium battery is caused constantly to reduce, but the operating voltage of lithium battery is still
It is changed between charging saturation voltage and final discharging voltage, therefore according to the voltage swing of lithium battery to the residue of lithium battery
Capacity carries out showing that caused deviation can be increasing with the growth of usage time；2nd, due at present to being remained in lithium battery
The display of covolume amount is shown merely by the mode of percentage, and specific remaining capacity is not shown, because
This user can not intuitively obtain actual remaining capacity data, while can not also obtain the situation of change of lithium battery capacity, because
This distance to be travelled that can not just be made rational planning for according to the current remaining capacity of lithium battery causes user greatly tired
It disturbs.
The content of the invention
The purpose of the invention is to overcome in the prior art electric vehicle inaccurate skill is shown to the capacity of lithium battery
Art problem provides bearing calibration and the means for correcting of a kind of electric automobile lithium battery capacity, passes through the state based on lithium battery
Parameter is corrected the capacity of lithium battery, so as to obtain accurate lithium battery capacity to be shown on electric vehicle.
To achieve these goals, one aspect of the present invention provides a kind of bearing calibration of electric automobile lithium battery capacity, institute
Stating bearing calibration includes：Judge whether the electric vehicle is to correct for the first time；It is the non-feelings corrected for the first time in the electric vehicle
Under condition：The state parameter of the lithium battery of the electric vehicle is obtained, and the lithium battery is put based on the state parameter
It is electrically operated, to obtain the present discharge curve of the lithium battery；The present discharge curve is compared with standard discharge curve
Compared with to obtain power correction factor, wherein the standard discharge curve is bent for the electric vehicle electric discharge that timing obtains for the first time
Line；The battery capacity of the lithium battery is corrected based on the power correction factor.
Preferably, it is described judge the electric vehicle whether be for the first time correction before, the bearing calibration further includes：Sentence
Whether the electricity of the lithium battery of the disconnected electric vehicle in the electricity of the lithium battery is not in Full Charge Capacity in Full Power State
In the case of state, charge prompting information is issued the user with, user to be prompted to be full of the electricity of the lithium battery；And judge
Whether the current battery temperature of the lithium battery is identical with carrying out the battery temperature of correction for the first time of timing for the first time, described current
Battery temperature with it is described for the first time correct battery temperature difference in the case of, temperature prompt information is issued the user with, to prompt user
The current battery temperature of the lithium battery is adjusted to described and corrects battery temperature for the first time.
Preferably, the state parameter includes current battery temperature, nominal discharge multiplying power, the nominal cell of the lithium battery
Capacity and present battery capacity.
Preferably, it is described that discharge operation is carried out to the lithium battery based on the state parameter, to obtain the lithium battery
Present discharge curve, including：Control the lithium battery that the nominal discharge multiplying power is kept to carry out discharge operation；Record the lithium
The correspondence and the lithium battery of electric current and voltage in battery discharge procedure when starting to discharge into stopping electric discharge from continuing
Discharge time；Correspondence and the discharge time based on the electric current and voltage obtain the current of the lithium battery and put
Electric curve.
Preferably, it is described by the present discharge curve compared with standard discharge curve with obtain capability correction because
Son, wherein the standard discharge curve is the electric vehicle discharge curve that timing obtains for the first time, based on the power school
Positive divisor is corrected the battery capacity of the lithium battery, including：By the present discharge curve and standard discharge curve into
Row compares, and obtains the mapped function relation to the standard discharge curve by the present discharge curve mapping, and is reflected described
Functional relation is penetrated as power correction factor；And based on the power correction factor and the rated cell capacity, to described
The battery capacity of lithium battery is corrected.
Second aspect of the present invention provides a kind of means for correcting of electric automobile lithium battery capacity, and the means for correcting includes：
Judging unit, for judging whether the electric vehicle is to correct for the first time；It is non-situation about correcting for the first time in the electric vehicle
Under：Discharge cell in the case of in the electric vehicle for non-correction for the first time, obtains the lithium battery of the electric vehicle
State parameter, and discharge operation is carried out to the lithium battery based on the state parameter, it is put with obtaining the current of the lithium battery
Electric curve；Comparing unit, for by the present discharge curve compared with standard discharge curve with obtain capability correction because
Son, wherein the standard discharge curve is the electric vehicle discharge curve that timing obtains for the first time；Unit is corrected, for base
The battery capacity of the lithium battery is corrected in the power correction factor.
Preferably, the means for correcting further includes：First pre- judging unit, for judge the electric vehicle whether be
Before correcting for the first time, whether the electricity of lithium battery of the electric vehicle is judged in Full Power State, in the lithium battery
In the case that electricity is not in Full Power State, charge prompting information is issued the user with, to prompt user by the lithium battery
Electricity is full of；And the second pre- judging unit, for before judging whether the electric vehicle is correction for the first time, described in judgement
Whether the current battery temperature of lithium battery is identical with carrying out the battery temperature of correction for the first time of timing for the first time, in the present battery
Temperature with it is described for the first time correct battery temperature difference in the case of, temperature prompt information is issued the user with, to prompt user by institute
The current battery temperature for stating lithium battery adjusts to described and corrects battery temperature for the first time.
Preferably, the discharge cell includes：Subelement is controlled, for the lithium battery to be controlled to keep the nominal discharge
Multiplying power carries out discharge operation；Subelement is recorded, the electric current in the lithium battery discharge process is corresponding with voltage to close for recording
System and the lithium battery from start to discharge into stop electric discharge when lasting discharge time；Computing subelement, it is described for being based on
The correspondence and the discharge time of electric current and voltage obtain the present discharge curve of the lithium battery.
Preferably, the comparing unit is used to by the present discharge curve compared with standard discharge curve, obtain
By the present discharge curve mapping to the mapped function relation of the standard discharge curve, and the mapped function relation is made
For power correction factor；And the correction unit is used for based on the power correction factor and the rated cell capacity, it is right
The battery capacity of the lithium battery is corrected.
Further, the present invention also provides a kind of computer readable storage medium, computer program is stored thereon with, the journey
Method provided by the invention is realized when sequence is executed by processor.
By technical solution provided by the invention, the present invention at least has the following technical effect that：
By according to the state parameter of lithium battery lithium battery being controlled to carry out discharge operation under the correcting condition in standard,
To obtain the different calibration curves under standard conditions, so as to prevent because of different status considerations, such as battery temperature, electric discharge times
Rate etc. is influenced caused by battery capacity, therefore has by the discharge curve that obtains of the present invention that real-time is good, accuracy is high
Feature.
The present discharge curve of acquisition by being obtained the work(of lithium battery by the present invention compared with standard discharge curve
Rate correction factor, so as to the lithium battery according to detection actual total capacity and current voltage size to the battery of lithium battery
Capacity carries out real time correction so that user, which can obtain, accurately, intuitively obtains the current actual capacity of lithium battery, is more convenient for using
Family uses, and improves user experience.
Description of the drawings
Fig. 1 is the specific implementation flow chart of the bearing calibration of electric automobile lithium battery capacity provided in an embodiment of the present invention；
Fig. 2 be electric automobile lithium battery capacity provided in an embodiment of the present invention bearing calibration in lithium battery present discharge it is bent
The schematic diagram of line and standard discharge curve；
Fig. 3 be electric automobile lithium battery capacity provided in an embodiment of the present invention bearing calibration in lithium battery present discharge it is bent
The schematic diagram of line and the voltage difference curve of standard discharge curve；
Fig. 4 is the structure diagram of the means for correcting of electric automobile lithium battery capacity provided in an embodiment of the present invention；
Fig. 5 is the structure diagram of the means for correcting for the electric automobile lithium battery capacity that another embodiment of the present invention provides；
Fig. 6 be electric automobile lithium battery capacity provided in an embodiment of the present invention means for correcting in the structure of discharge cell show
It is intended to.
Specific embodiment
The capacity that can not accurately detect lithium battery to overcome electric vehicle in the prior art shows inaccurate technology
Problem, the embodiment of the present invention provides bearing calibration and the means for correcting of a kind of electric automobile lithium battery capacity, by being based on lithium
The state parameter of battery is corrected the capacity of lithium battery, so as to obtain accurate lithium battery capacity with enterprising in electric vehicle
Row display.
The specific embodiment of the embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be appreciated that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, be not intended to limit the invention embodiment.
Term " system " and " network " in the embodiment of the present invention can be used interchangeably." multiple " refer to two or two with
On, in consideration of it, " multiple " can also be interpreted as " at least two " in the embodiment of the present invention."and/or" describes affiliated partner
Incidence relation, expression may have three kinds of relations, for example, A and/or B, can represent：Individualism A exists simultaneously A and B, single
Solely there are these three situations of B.In addition, character "/", unless otherwise specified, it is a kind of "or" to typically represent forward-backward correlation object
Relation.In addition, it is necessary to understand, in the description of the embodiment of the present invention, the vocabulary such as " first ", " second " are only used for distinguishing
The purpose of description, and it is not intended that instruction or imply relative importance, can not be interpreted as indicating or hint order.
Fig. 1 is referred to, the embodiment of the present invention provides a kind of bearing calibration of electric automobile lithium battery capacity, the correction side
Method comprises the following steps：
S10) judge whether the electric vehicle is to correct for the first time；
S20) in the case where the electric vehicle is non-correction for the first time：Obtain the state of the lithium battery of the electric vehicle
Parameter, and discharge operation is carried out to the lithium battery based on the state parameter, to obtain the present discharge of lithium battery song
Line；
S30) by the present discharge curve compared with standard discharge curve to obtain power correction factor, wherein institute
Standard discharge curve is stated as the electric vehicle discharge curve that timing obtains for the first time；
S40) battery capacity of the lithium battery is corrected based on the power correction factor.
In embodiments of the present invention, by obtaining the state parameter of lithium battery before control lithium battery carries out discharge operation,
And according to the state parameter of lithium battery lithium battery is controlled to carry out discharge operation, it can be ensured that obtain lithium battery present discharge curve
Condition is with obtaining the consistent of standard discharge curve, therefore it is comparable to ensure that present discharge curve and standard discharge curve have
Property.
Further, in embodiments of the present invention, by obtaining present discharge curve and standard discharge curve and carrying out
Comparison, so as to which the ratio of the standard total capacity of the current total capacity of lithium battery and lithium battery when first used can not only be obtained, moreover it is possible to
Obtain the corresponding pass of each battery capacity battery capacity with lithium battery when first used of the lithium battery during currently used
System, so as to ensure that the power correction factor subsequently obtained has higher accuracy and real-time.
In embodiments of the present invention, the bearing calibration further includes：Judge whether the electric vehicle is for the first time described
Before correction, whether the electricity of lithium battery of the electric vehicle is judged in Full Power State, in the electricity of the lithium battery
In the case of being not in Full Power State, charge prompting information is issued the user with, to prompt user by the electricity of the lithium battery
It is full of；And judge the current battery temperature of the lithium battery whether with carrying out the battery temperature phase of correction for the first time of timing for the first time
Together, in the case of the current battery temperature with the battery temperature difference of correction for the first time, temperature prompt letter is issued the user with
Breath, battery temperature is corrected so that user to be prompted to adjust the current battery temperature of the lithium battery to described for the first time.
In a kind of possible embodiment, user carries out the lithium battery of electric vehicle after electric vehicle drive 2 years
Correction, therefore enter correction mode.Electric vehicle first determines whether the electricity of the lithium battery is full of, and from battery management system
In get the current electricity of lithium battery and have been filled with, whether detect the battery temperature of lithium battery again at this time with carrying out timing for the first time
The battery temperature of correction for the first time it is identical, and get from battery management system that correct battery temperature for the first time be 25 DEG C and lithium
Battery obtains current battery temperature as 30 DEG C, more than correcting battery temperature for the first time, therefore issues the user with prompt message, prompts user
Stop the charge or discharge to lithium battery to operate, be corrected again after the current battery temperature of lithium battery is down to 25 DEG C.
For those skilled in the art, it is readily appreciated that technical staff can also by set a comparison threshold value,
In the case where the current battery temperature of lithium battery is in compared with normal cell temperature in the comparison threshold range, battery is judged
Current battery temperature be consistent with normal cell temperature, subsequent correction operation can be carried out, the skill that above-mentioned technical proposal is realized
Art effect is identical with the technical program, therefore with the technical inspiration for obtaining above-mentioned technical proposal, falls within the technical program
Protection domain does not do excessively repeat herein.
Since different battery temperatures has larger impact to the discharge capacity of lithium battery, by the way that lithium battery is arranged at
Be corrected under same temperature, can obtain with the corresponding current total capacity of standard total capacity, ensure that the accurate of correction
Property, it is further, detected in different battery capacities since the discharge curve of battery is a nonlinear curve
Data may have larger difference, and all calibration curve contents can not be derived according to partial detection, therefore will
Battery capacity carries out battery correction again after being full of, and can be further ensured that the accuracy of detection, has more so as to ensure to correct result
High accuracy.
In embodiments of the present invention, the state parameter includes the current battery temperature of the lithium battery, nominal discharge times
Rate, rated cell capacity and present battery capacity.
In embodiments of the present invention, it is described that discharge operation is carried out to the lithium battery based on the state parameter, to obtain
The present discharge curve of the lithium battery, including：Control the lithium battery that the nominal discharge multiplying power is kept to carry out discharge operation；
Record the electric current in the lithium battery discharge process and voltage correspondence and the lithium battery from starting to discharge into stopping
Lasting discharge time during electric discharge；Correspondence and the discharge time based on the electric current and voltage obtain the lithium electricity
The present discharge curve in pond.
In a possible embodiment, electric vehicle gets the nominal discharge of lithium battery from battery management system
Multiplying power is 1C, therefore lithium battery is controlled to carry out discharge operation with the discharge-rate of 1C, while records lithium battery with the electric discharge of 1C
During multiplying power is discharged, the numerical value of voltage swing, which changes with time, situation and to be recorded, so as to draw out in 1C
The discharge curve that the voltage of lithium battery changes over time in the case of discharge-rate.
In embodiments of the present invention, it is described by the present discharge curve compared with standard discharge curve to obtain work(
Rate correction factor, wherein the standard discharge curve is the electric vehicle discharge curve that timing obtains for the first time, based on institute
Power correction factor is stated to be corrected the battery capacity of the lithium battery, including：The present discharge curve is put with standard
Electric curve is compared, and obtains the mapped function relation to the standard discharge curve by the present discharge curve mapping, and
Using the mapped function relation as power correction factor；And held based on the power correction factor and the nominal cell
Amount, is corrected the battery capacity of the lithium battery.
In a possible embodiment, Fig. 2 and Fig. 3 are referred to, curve A is electric vehicle school for the first time in Fig. 2
The standard discharge curve that timing obtains, the current correction curve that curve B is obtained by the electric vehicle current correction, from Fig. 2
In it can be seen that, at the same time interval and identical discharge-rate in the case of, the current lithium battery of electric vehicle is being put
The difference of voltage of the voltage with timing lithium battery for the first time in electric discharge when electric is changed over time as shown in figure 3,0-t1's
In time range, the voltage change of present discharge curve and standard discharge curve is more stable at this time, therefore corresponding voltage
Difference variation is also more stable；It in the time range of t1-t2, uses up, works as since the electricity of current lithium battery levels off to
Preceding discharge curve rapid decrease, and standard discharge curve remains on stable voltage change trend, therefore corresponding voltage difference
Value increases suddenly；In the time range of t2-t3, the electricity of current lithium battery exhausts at this time, therefore present discharge curve is kept
Final discharging voltage, standard discharge curve remains on stable voltage change trend, therefore corresponding voltage difference keeps one
The variation tendency of a stabilization；In the time range of t3-t4, the voltage rapid decrease of standard discharge curve, therefore corresponding at this time
Voltage difference rapid decrease.
It is observed, can be obtained the present discharge curve mapping to the standard by the curve in Fig. 3
The mapped function relation of discharge curve, due to carrying out integration by the discharge curve to lithium battery, to be achieved with lithium battery currently defeated
The power gone out, therefore the present discharge curve and the mapped function relation of the standard discharge curve i.e. working as lithium battery
The mapped function relation of preceding discharge power and the standard discharge power of timing for the first time, that is, obtain the current power school of lithium battery
Positive divisor, and the power correction factor is stored in battery management system.
In a kind of possible embodiment, the rated cell capacity of electric automobile lithium battery is 50AH, is travelling one section
After time, user is corrected the battery capacity of the lithium battery of the electric vehicle, and the power correction factor obtained after correcting
The present battery capacity for showing the lithium battery of electric vehicle is the 80% of rated cell capacity, the i.e. battery capacity of lithium battery at this time
For 40AH, after the electricity of lithium battery is full of by user, battery management system shows that current battery charge is 40AH (100%), at this time
After user starts the electric vehicle and travels certain distance, according to the work(for the electric vehicle output that battery management system monitors
Rate, battery management system show that current battery charge is 28.8AH (72%).
Further, in embodiments of the present invention, based on power correction factor, by carrying out computing to rated cell capacity
The current actual battery total capacity of lithium battery can be obtained and by during the use of electric vehicle, to electric vehicle
Output current and output voltage monitored in real time, so as to obtain the real-time output power of electric vehicle, then to electric vehicle
The current battery total capacity of lithium battery be corrected and obtain actual battery total capacity on the basis of, lithium battery can be obtained in real time and worked as
Preceding residue total capacity, and prompt the user with.
In embodiments of the present invention, by the way that lithium battery is controlled to carry out obtaining the electric discharge of lithium battery under identical correcting condition
Curve, and compared with standard discharge curve, so as to accurately obtain the lithium battery of electric vehicle in current output
Mapped function relation between the standard output power of power and for the first time timing, so as to obtain lithium by the mapped function relation
The current actual battery total capacity of battery, while according to the actual battery total capacity, can be defeated according to the realtime power of electric vehicle
Go out accurately to show electric automobile lithium battery current residual total capacity and actual battery total capacity rather than only root to user
The battery capacity percentage of estimation is shown to user according to the current voltage of lithium battery, user experience is greatly improved, improves
The accuracy that lithium battery capacity is shown.
Fig. 4 is referred to, based on same inventive concept, the embodiment of the present invention provides a kind of school of electric automobile lithium battery capacity
Equipment, the means for correcting include：Judging unit, for judging whether the electric vehicle is to correct for the first time；Discharge cell,
In the case of in the electric vehicle for non-correction for the first time, the state parameter of the lithium battery of the electric vehicle is obtained, and
Discharge operation is carried out to the lithium battery based on the state parameter, to obtain the present discharge curve of the lithium battery；Compare
Unit, for by the present discharge curve compared with standard discharge curve to obtain power correction factor, wherein described
Standard discharge curve is the electric vehicle discharge curve that timing obtains for the first time；Unit is corrected, for being based on the power
Correction factor is corrected the battery capacity of the lithium battery.
Fig. 5 is referred to, in embodiments of the present invention, the means for correcting further includes：First pre- judging unit, for sentencing
Before whether the electric vehicle that breaks is correction for the first time, judge the electricity of lithium battery of the electric vehicle whether in Full Charge Capacity
State in the case where the electricity of the lithium battery is not in Full Power State, issues the user with charge prompting information, with prompting
The electricity of the lithium battery is full of by user；And the second pre- judging unit, for judge the electric vehicle whether headed by
Before secondary correction, judge the current battery temperature of the lithium battery whether with carrying out the correction battery temperature for the first time of timing for the first time
It is identical, in the case of the current battery temperature with the battery temperature difference of correction for the first time, issue the user with temperature prompt
Information corrects battery temperature for the first time user to be prompted to adjust the current battery temperature of the lithium battery to described.
Fig. 6 is referred to, in embodiments of the present invention, the discharge cell includes：Subelement is controlled, for controlling the lithium
Battery keeps the nominal discharge multiplying power to carry out discharge operation；Subelement is recorded, for recording in the lithium battery discharge process
Electric current and voltage correspondence and the lithium battery from start to discharge into stop electric discharge when lasting discharge time；Fortune
Operator unit obtains the current of the lithium battery for the correspondence based on the electric current and voltage and the discharge time
Discharge curve.
In embodiments of the present invention, the comparing unit is used to carry out the present discharge curve and standard discharge curve
Compare, obtain the mapped function relation to the standard discharge curve by the present discharge curve mapping, and by the mapping
Functional relation is as power correction factor；And the correction unit is used for based on the power correction factor and the specified electricity
Tankage is corrected the battery capacity of the lithium battery.
Further, the embodiment of the present invention also provides a kind of computer readable storage medium, is stored thereon with computer journey
Sequence, the program realize method of the present invention when being executed by processor.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In the skill of the present invention
In art conception range, a variety of simple variants can be carried out to technical scheme, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to
Protection scope of the present invention.
It is further to note that the specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various combinations of possible ways no longer separately illustrate.
It will be appreciated by those skilled in the art that it is that can pass through to implement the method for the above embodiments
Program instructs relevant hardware to complete, which uses so that single including some instructions in the storage medium
Piece machine, chip or processor (processor) perform all or part of step of each embodiment the method for the application.It is and preceding
The storage medium stated includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic disc or CD.
In addition, it can also be combined between a variety of embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is run counter to, should equally be considered as disclosure of that of the embodiment of the present invention.
Claims (10)
1. a kind of bearing calibration of electric automobile lithium battery capacity, which is characterized in that the bearing calibration includes：
Judge whether the electric vehicle is to correct for the first time；
In the case where the electric vehicle is non-correction for the first time：
The state parameter of the lithium battery of the electric vehicle is obtained, and is discharged based on the state parameter the lithium battery
Operation, to obtain the present discharge curve of the lithium battery；
By the present discharge curve to obtain power correction factor compared with standard discharge curve, wherein the standard is put
Electric curve is the electric vehicle discharge curve that timing obtains for the first time；
The battery capacity of the lithium battery is corrected based on the power correction factor.
2. bearing calibration according to claim 1, which is characterized in that the bearing calibration further includes：
Before judging whether the electric vehicle is correction for the first time：
Judge that the electricity of the lithium battery of the electric vehicle whether in Full Power State, is not in the electricity of the lithium battery
In the case of Full Power State, charge prompting information is issued the user with, user to be prompted to be full of the electricity of the lithium battery；With
And
Judge whether the current battery temperature of the lithium battery is identical with carrying out the battery temperature of correction for the first time of timing for the first time,
The current battery temperature with it is described for the first time correct battery temperature difference in the case of, issue the user with temperature prompt information, with
Prompting user adjusts the current battery temperature of the lithium battery to described corrects battery temperature for the first time.
3. bearing calibration according to claim 1, which is characterized in that the state parameter includes the current of the lithium battery
Battery temperature, nominal discharge multiplying power, rated cell capacity and present battery capacity.
4. bearing calibration according to claim 3, which is characterized in that described to be based on the state parameter to the lithium battery
Discharge operation is carried out, to obtain the present discharge curve of the lithium battery, including：
Control the lithium battery that the nominal discharge multiplying power is kept to carry out discharge operation；
Record the electric current in the lithium battery discharge process and voltage correspondence and the lithium battery from starting to discharge into
Stop discharge time lasting during electric discharge；
Correspondence and the discharge time based on the electric current and voltage obtain the present discharge curve of the lithium battery.
5. bearing calibration according to claim 3, which is characterized in that described that the present discharge curve and standard discharge
Curve is compared to obtain power correction factor, wherein the standard discharge curve is the electric vehicle, timing obtains for the first time
The discharge curve obtained, is corrected the battery capacity of the lithium battery based on the power correction factor, including：
By the present discharge curve compared with standard discharge curve, obtain the present discharge curve mapping to described
The mapped function relation of standard discharge curve, and using the mapped function relation as power correction factor；And
Based on the power correction factor and the rated cell capacity, the battery capacity of the lithium battery is corrected.
6. a kind of means for correcting of electric automobile lithium battery capacity, which is characterized in that the means for correcting includes：
Judging unit, for judging whether the electric vehicle is to correct for the first time；
Discharge cell in the case of in the electric vehicle for non-correction for the first time, obtains the lithium battery of the electric vehicle
State parameter, and based on the state parameter to the lithium battery carry out discharge operation, to obtain the current of the lithium battery
Discharge curve；
Comparing unit, for by the present discharge curve compared with standard discharge curve to obtain power correction factor,
Wherein described standard discharge curve is the electric vehicle discharge curve that timing obtains for the first time；
Unit is corrected, for being corrected based on the power correction factor to the battery capacity of the lithium battery.
7. means for correcting according to claim 6, which is characterized in that the means for correcting further includes：
First pre- judging unit, for before judging whether the electric vehicle is correction for the first time, judging the electric vehicle
Lithium battery electricity whether in Full Power State, in the case where the electricity of the lithium battery is not in Full Power State,
Charge prompting information is issued the user with, user to be prompted to be full of the electricity of the lithium battery；And
Second pre- judging unit, for before judging whether the electric vehicle is correction for the first time, judging the lithium battery
Whether current battery temperature is identical with carrying out the battery temperature of correction for the first time of timing for the first time, in the current battery temperature and institute
It states in the case of correcting battery temperature difference for the first time, temperature prompt information is issued the user with, to prompt user by the lithium battery
Current battery temperature adjust to described and correct battery temperature for the first time.
8. means for correcting according to claim 6, which is characterized in that the discharge cell includes：
Subelement is controlled, for controlling the lithium battery that the nominal discharge multiplying power is kept to carry out discharge operation；
Subelement is recorded, for recording correspondence and the lithium of electric current and voltage in the lithium battery discharge process
Battery from start to discharge into stop electric discharge when lasting discharge time；
Computing subelement obtains the lithium battery for the correspondence based on the electric current and voltage and the discharge time
Present discharge curve.
9. means for correcting according to claim 6, which is characterized in that
The comparing unit is used for the present discharge curve compared with standard discharge curve, is obtained and is currently put described
Electric curve mapping to the standard discharge curve mapped function relation, and using the mapped function relation as capability correction because
Son；And
The correction unit is used for based on the power correction factor and the rated cell capacity, to the battery of the lithium battery
Capacity is corrected.
10. a kind of machine readable storage medium, instruction is stored on the machine readable storage medium, the instruction is for so that machine
Perform the method described in any claim in the application claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN116699448A (en) * | 2023-08-09 | 2023-09-05 | 合肥工业大学 | Lithium phosphate battery platform-stage SOC correction method, device and system |
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