CN108761343A - SOH bearing calibrations and device - Google Patents
SOH bearing calibrations and device Download PDFInfo
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- CN108761343A CN108761343A CN201810570779.9A CN201810570779A CN108761343A CN 108761343 A CN108761343 A CN 108761343A CN 201810570779 A CN201810570779 A CN 201810570779A CN 108761343 A CN108761343 A CN 108761343A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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Abstract
A kind of SOH bearing calibrations of offer of the embodiment of the present invention and device.The method includes：Obtain the corresponding SOC-OCV curves of different SOH；Every SOC-OCV curve in a plurality of SOC-OCV curves is divided into two parts according to default partition strategy, and according in the first electricity and first part with corresponding first SOC of the first electricity the first SOH is calculated and the 2nd SOH is calculated according to twoth SOC corresponding with the second electricity in the second electricity and second part, wherein, the first electricity and the second electricity are related to battery current state；According to the first SOH and the 2nd SOH of every SOC-OCV curve, the SOH current to battery is corrected.SOH after correcting through the above way has higher accuracy in entire battery life cycle.
Description
Technical field
The present invention relates to electric vehicle engineering fields, in particular to a kind of SOH bearing calibrations and device.
Background technology
The power resources of electric vehicle are in battery, and aging, internal resistance increase and capacity can occur in use for battery
Situations such as decaying.Wherein, SOH (Section Of Health) represents the ageing state of battery, and the ageing state meeting of battery
The security row and reliability of electric vehicle are influenced, therefore, SOH is BMS (Battery Management System, battery management
System) monitoring an important parameter, fast and accurately monitor battery SOH to battery long-term safety effectively operation have important meaning
Justice.
Invention content
In order to overcome above-mentioned deficiency in the prior art, the embodiment of the present invention to be designed to provide a kind of correction sides SOH
The current SOH of battery can be corrected to accurate numerical value by method and device, and the strong of battery is accurately grasped convenient for driver
Health state.
The embodiment of the present invention provides a kind of SOH bearing calibrations, the method includes：
Obtain the corresponding SOC-OCV curves of different SOH；
Every SOC-OCV curve in a plurality of SOC-OCV curves is divided into two parts according to default partition strategy, and according to
The first SOH is calculated and according to the second electricity in the first SOC corresponding with first electricity in first electricity and first part
The 2nd SOH is calculated with twoth SOC corresponding with second electricity in second part, wherein first electricity and institute
It is related to battery current state to state the second electricity；
According to the first SOH and the 2nd SOH of every SOC-OCV curve, the SOH current to battery is corrected.
Optionally, in embodiments of the present invention, the first SOH and described according to every SOC-OCV curve
SOH current to battery two SOH is corrected, including：
Calculate separately the difference of the first SOH and the 2nd SOH of same SOC-OCV curves；
The corresponding multiple differences of a plurality of SOC-OCV curves are compared, to obtain in the multiple difference most
Small difference；
Battery is worked as according to the first SOH of SOC-OCV curves corresponding with the minimal difference and the 2nd SOH
Preceding SOH is corrected.
Optionally, in embodiments of the present invention, described in basis SOC-OCV curves corresponding with the minimal difference
SOH current to battery first SOH and the 2nd SOH is corrected, including：
Calculate the flat of the first SOH and the 2nd SOH of the SOC-OCV curves corresponding with the minimal difference
Mean value；
According to the current SOH of the mean value adjustment battery.
Optionally, in embodiments of the present invention, the basis presets partition strategy by every in a plurality of SOC-OCV curves
SOC-OCV curves are divided into two parts, including：
Obtain the intersection point of a plurality of SOC-OCV curves；
Every SOC-OCV curve is divided into two parts according to the intersection point.
Optionally, in embodiments of the present invention, it is described according in the first electricity and first part with first electricity pair
The first SOC answered is calculated the first SOH and according to corresponding with second electricity in the second electricity and the second part
The 2nd SOH is calculated in 2nd SOC, including：
First voltage corresponding with first electricity is obtained, and is obtained in the first part according to the first voltage
Take first SOC corresponding with the first voltage；
Second voltage corresponding with second electricity is obtained, and is obtained in the second part according to the second voltage
Take twoth SOC corresponding with the second voltage；
The first capacity is calculated according to first electricity and the first SOC, and according to second electricity and
The second capacity is calculated in two SOC；
The first SOH is obtained according to battery initial capacity and first calculation of capacity, and according to battery initial capacity
And second calculation of capacity obtains the 2nd SOH.
The embodiment of the present invention also provides a kind of SOH means for correctings, and described device includes：
Acquisition module, for obtaining the corresponding SOC-OCV curves of different SOH；
Computing module, for being divided into every SOC-OCV curve in a plurality of SOC-OCV curves according to default partition strategy
Two parts, and according to first SOC corresponding with first electricity in the first electricity and first part be calculated the first SOH and
The 2nd SOH is calculated according to twoth SOC corresponding with second electricity in the second electricity and second part, wherein described
First electricity and second electricity are related to battery current state；
Correction module, for current to battery according to the first SOH and the 2nd SOH of every SOC-OCV curve
SOH be corrected.
Optionally, in embodiments of the present invention, the correction module includes：
First correction module, the first SOH and the 2nd SOH for calculating separately same SOC-OCV curves
Difference；
Second correction module, for being compared the corresponding multiple differences of a plurality of SOC-OCV curves, to obtain
Minimal difference in the multiple difference；
Third correction module, for according to the first SOH of SOC-OCV curves corresponding with the minimal difference and
SOH current to battery 2nd SOH is corrected.
Optionally, in embodiments of the present invention, the third correction module is according to corresponding with the minimal difference
The first SOH of SOC-OCV curves and the 2nd SOH include to the corrected modes of SOH that battery is current：
Calculate the flat of the first SOH and the 2nd SOH of the SOC-OCV curves corresponding with the minimal difference
Mean value；
According to the current SOH of the mean value adjustment battery.
Optionally, in embodiments of the present invention, the computing module according to default partition strategy by a plurality of SOC-OCV curves
In every SOC-OCV curve be divided into two-part mode and include：
Obtain the intersection point of a plurality of SOC-OCV curves；
Every SOC-OCV curve is divided into two parts according to the intersection point.
Optionally, in embodiments of the present invention, the computing module according in the first electricity and first part with described
Corresponding first SOC of one electricity is calculated the first SOH and according to electric with described second in the second electricity and the second part
Measuring the mode that the 2nd SOH is calculated in corresponding 2nd SOC includes：
First voltage corresponding with first electricity is obtained, and is obtained in the first part according to the first voltage
Take first SOC corresponding with the first voltage；
Second voltage corresponding with second electricity is obtained, and is obtained in the second part according to the second voltage
Take twoth SOC corresponding with the second voltage；
The first capacity is calculated according to first electricity and the first SOC, and according to second electricity and
The second capacity is calculated in two SOC；
The first SOH is obtained according to battery initial capacity and first calculation of capacity, and according to battery initial capacity
And second calculation of capacity obtains the 2nd SOH.In terms of existing technologies, the invention has the advantages that：
A kind of SOH bearing calibrations of offer of the embodiment of the present invention and device.It is a plurality of at different SOH that battery is obtained first
Then every SOC-OCV curve in a plurality of SOC-OCV curves is divided into two by SOC-OCV curves according to default partition strategy
Point.It is calculated then according to first SOC corresponding with first electricity in pre-set first electricity and first part
First SOH is calculated according to pre-setting to obtain the 2nd SOC corresponding with second electricity in the second electricity and second part
To the 2nd SOH.Wherein, first electricity and second electricity are related to battery current state.Finally according to every SOC-
SOH current to battery the first SOH of OCV curves and the 2nd SOH is corrected.Through the above way to SOH into
Row correction, the SOH after correction have higher accuracy in entire battery life cycle, battery are accurately grasped convenient for driver
Health status.
To enable the above objects, features, and advantages of invention to be clearer and more comprehensible, present pre-ferred embodiments cited below particularly, and
The appended attached drawing of cooperation, is described in detail below.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the block diagram of computing device provided in an embodiment of the present invention.
Fig. 2 is the flow diagram of SOH bearing calibrations provided in an embodiment of the present invention.
Fig. 3 is one of the flow diagram of sub-step that step S120 includes in Fig. 2.
Fig. 4 is the two of the flow diagram for the sub-step that step S120 includes in Fig. 2.
Fig. 5 is the flow diagram for the sub-step that step S130 includes in Fig. 2.
Fig. 6 is the flow diagram for the sub-step that sub-step S133 includes in Fig. 5.
Fig. 7 is a plurality of SOC-OCV curve synoptic diagrams provided in an embodiment of the present invention.
Fig. 8 is that SOH provided in an embodiment of the present invention calculates schematic diagram.
Fig. 9 is the comparison schematic diagram of true SOH provided in an embodiment of the present invention and the SOH of correction.
Figure 10 is the block diagram of SOH means for correctings provided in an embodiment of the present invention.
Icon：100- computing devices；110- memories；120- storage controls；130- processors；200-SOH correction dresses
It sets；210- acquisition modules；220- computing modules；230- correction modules；The first correction modules of 231-；232- second corrects submodule
Block；233- third correction modules.
Specific implementation mode
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
The every other embodiment obtained under the premise of going out creative work, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
Before present inventor proposes the technical solution in the embodiment of the present application, SOH algorithms of electric vehicle at present
It is with the health status of how much judgement batteries of mileage travelled, however this mode does not account for the difference of user's use habit
Not, the precision of the SOH of estimation can be caused not high.Some then predicts battery by establishing electrochemical model and empirical model etc.
SOH, but the foundation of model needs to introduce a large amount of parameter and a large amount of experiment, it is more complicated, it is difficult in practical electric vehicle
Upper use.
For the defect present in above scheme, be inventor being obtained after putting into practice and carefully studying as a result,
Therefore, the discovery procedure of the above problem and the solution that hereinafter the embodiment of the present application is proposed regarding to the issue above, all
It should be the contribution that inventor makes the application during the application.
Fig. 1 is please referred to, Fig. 1 is the block diagram of computing device 100 provided in an embodiment of the present invention.The computing device
100 can be the controller on electric vehicle, can also be the computer etc. used in testing battery SOH.The computing device
100 include：Memory 110, storage control 120, processor 130 and SOH means for correctings 200.Pass through the SOH means for correctings
200, the higher SOH of accuracy can be obtained, and calculating process is uncomplicated.
It is directly or indirectly electrically connected between 130 each element of the memory 110, storage control 120 and processor,
To realize the transmission or interaction of data.For example, these elements can pass through one or more communication bus or signal wire between each other
It realizes and is electrically connected.Be stored with SOH means for correctings 200 in memory 110, the SOH means for correctings 200 include it is at least one can
The software function module being stored in the form of software or firmware (firmware) in the memory 110.The processor 130
It is stored in software program and module in memory 110 by operation, such as the SOH means for correctings 200 in the embodiment of the present invention,
To perform various functions application and data processing, that is, realize the SOH bearing calibrations in the embodiment of the present invention.
Wherein, the memory 110 may be, but not limited to, random access memory (Random Access
Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read only memory (Programmable
Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only
Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only
Memory, EEPROM) etc..Wherein, memory 110 is for storing program, the processor 130 after receiving and executing instruction,
Execute described program.The processor 130 and other possible components can control the access of memory 110 in the storage
It is carried out under the control of device 120.
The processor 130 may be a kind of IC chip, the processing capacity with signal.Above-mentioned processor
130 can be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit
(Network Processor, NP) etc..It can also be digital signal processor (DSP), application-specific integrated circuit (ASIC), scene
Programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware group
Part.It may be implemented or execute disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be with
It is microprocessor or the processor can also be any conventional processor etc..
It is appreciated that structure shown in FIG. 1 is only to illustrate, computing device 100 may also include it is more than shown in Fig. 1 or
Less component, or with the configuration different from shown in Fig. 1.Each component shown in Fig. 1 may be used hardware, software or its
Combination is realized.
Fig. 2 is please referred to, Fig. 2 is the flow diagram of SOH bearing calibrations provided in an embodiment of the present invention.The method can be with
The current SOH of battery is corrected to more accurate numerical value.The detailed process of SOH bearing calibrations is described in detail below.
Step S110 obtains the corresponding SOC-OCV curves of different SOH.
It can first pass through in advance and charge and discharge cycles test is carried out to a battery, obtain a plurality of SOC-OCV curves.Optionally, exist
In the present embodiment, when the corresponding SOH of battery to electric vehicle is corrected, can warp directly be tested into obtained institute in advance
There are SOC-OCV curves as subsequently to the corrected bases SOH that battery is current, so that the accuracy rate of the SOH of correction
Higher.Part SOC-OCV curves can also be selected as follow-up SOH from through testing in advance in obtained all SOC-OCV curves
The basis of correction, to reduce calculation amount.Wherein, SOC-OCV curves indicate SOC (State of Charge, state-of-charge,
Be remaining capacity) with the relationship of OCV (Open Circuit Voltage, open-circuit voltage).
Optionally, when from part SOC-OCV curves are selected in obtained all SOC-OCV curves through testing in advance,
It can select the corresponding SOC-OCV curves of different SOH.In a kind of embodiment in the present embodiment, SOH can be selected to exist
Corresponding SOC-OCV curves between 80%-100%.Further, for example, on the basis of SOH, at interval of 5% selection one
SOC-OCV curves.
Every SOC-OCV curve in a plurality of SOC-OCV curves is divided into two by step S120 according to default partition strategy
Point, and according to first SOC corresponding with first electricity in the first electricity and first part be calculated the first SOH and according to
The 2nd SOH is calculated in the 2nd SOC corresponding with second electricity in second electricity and second part.
Fig. 3 is please referred to, Fig. 3 is one of the flow diagram of sub-step that step S120 includes in Fig. 2.Step S120 can be with
Including sub-step S121 and sub-step S122.
Sub-step S121 obtains the intersection point of a plurality of SOC-OCV curves.
Every SOC-OCV curve is divided into two parts by sub-step S122 according to the intersection point.
Via experiment it is found that OCV gradually rises with OCV gradual lower when the continuous aging of battery, full electricity and when empty electricity,
Different SOC-OCV curves are caused to have an intersection point.It therefore, in the present embodiment, can be with after obtaining a plurality of SOC-OCV curves
The intersection point of a plurality of SOC-OCV curves is directly obtained according to a plurality of SOC-OCV curves.And then it will be described a plurality of according to intersection point
Every SOC-OCV curve in SOC-OCV curves is divided into two parts.For example, the SOC of a curve record corresponds to 10%-100%,
And the corresponding SOC of intersection point is 50%, then the curve can be divided into two parts according to 50%, i.e.,：10%-50% is a part,
50%-100% is another part.
Fig. 4 is please referred to, Fig. 4 is the two of the flow diagram for the sub-step that step S120 includes in Fig. 2.Step S120 may be used also
To include sub-step S124, sub-step S125, sub-step S126 and sub-step S127.
Sub-step S124 obtains first voltage corresponding with first electricity, and according to the first voltage described
First SOC corresponding with the first voltage is obtained in first part.
Sub-step S125 obtains second voltage corresponding with second electricity, and according to the second voltage described
Twoth SOC corresponding with the second voltage is obtained in second part.
Electric vehicle can show the current SOC of battery and current electric quantity, wherein the current SOC of battery and battery of display are true
Real SOC has deviation, thus the SOC directly used in follow-up calculating process is the SOC obtained by SOC-OCV curves.At this
It, before the computation, can be according to the current nearest preset times of range, distance of the SOC of the first part in embodiment
First electricity is arranged in the SOC and current electric quantity that electric vehicle in charge and discharge process is shown.And it sets in the same way
Set second electricity.Obtain as a result, with relevant first electricity of battery current state and second electricity, and ensure
In the first part, corresponding 2nd SOC's corresponding first SOC of first electricity of second electricity exists
In the second part.Optionally, the preset times can be primary, i.e., by the current recent charging process of distance
Or discharge process is configured first electricity and the second charge volume, that is to say, that according to current ongoing charging
First electricity and second electricity is arranged in process or discharge process.
After battery standing preset time, the voltage when electricity for obtaining battery is first electricity, using as first
Voltage.And second voltage is obtained by same mode.Since SOC-OCV curves are the curves about SOC, OCV, it can
It is multiple corresponding with the first voltage to be obtained in the first part of a plurality of SOC-OCV curves according to the first voltage
The first SOC, and obtained on the second part of a plurality of SOC-OCV curves according to the second voltage multiple with described the
Corresponding 2nd SOC of two voltages.
The first capacity is calculated according to first electricity and the first SOC in sub-step S126, and according to described
The second capacity is calculated in two electricity and the 2nd SOC.
In the present embodiment, using coulomb algorithm according to the first SOC described in every SOC-OCV curve and first electricity
Corresponding first capacity of this curve is calculated in amount, and according to the 2nd SOC and described second described in every SOC-OCV curve
Corresponding second capacity of this curve is calculated in electricity.Wherein, the battery capacity that coulomb algorithm is calculated is a certain section and fills
The ratio of discharge capacity Δ Ah and Δ SOC, i.e. battery capacity C=Δs Ah/ Δs SOC.
Sub-step S127 obtains the first SOH according to battery initial capacity and first calculation of capacity, and according to electricity
Pond initial capacity and second calculation of capacity obtain the 2nd SOH.
In the present embodiment, it after corresponding first capacity of every SOC-OCV curve and the second capacity is calculated, calculates
The ratio of each first capacity and the battery initial capacity calculates each second capacity and institute to obtain the first SOH
The ratio of battery initial capacity is stated to obtain the 2nd SOH.Wherein, battery initial capacity indicates appearance when battery is new battery
Amount.
Step S130, according to the first SOH and the 2nd SOH of every SOC-OCV curve SOH current to battery
It is corrected.
Fig. 5 is please referred to, Fig. 5 is the flow diagram for the sub-step that step S130 includes in Fig. 2.Step S130 may include
Sub-step S131, sub-step S132 and sub-step S133.
Sub-step S131 calculates separately the difference of the first SOH and the 2nd SOH of same SOC-OCV curves.
The corresponding multiple differences of a plurality of SOC-OCV curves are compared by sub-step S132, the multiple to obtain
Minimal difference in difference.
Sub-step S133, according to the first SOH and described second of SOC-OCV curves corresponding with the minimal difference
SOH current to battery SOH is corrected.
In the present embodiment, which is calculated according to corresponding first SOH and the 2nd SOH of every SOC-OCV curve
The difference of two SOH of OCV curves, then minimal difference is selected from the multiple differences being calculated, with from it is described a plurality of
Corrected first SOH and the 2nd SOH of SOH that can be used for battery is current are selected in SOC-OCV curves.
Fig. 6 is please referred to, Fig. 6 is the flow diagram for the sub-step that sub-step S133 includes in Fig. 5.Sub-step S133 can be with
Including sub-step S1331 and sub-step S1332.
Sub-step S1331 calculates the first SOH and the institute of the SOC-OCV curves corresponding with the minimal difference
State the average value of the 2nd SOH；
Sub-step S1332, according to the current SOH of the mean value adjustment battery.
In the present embodiment, after obtaining the minimal difference, determine that SOC-OCV curves corresponding with the minimal difference are
Target SOC-OCV curves calculate the average value of the first SOH and the 2nd SOH of target SOC-OCV curves, and battery is current
SOH be corrected to the average value.
Since SOC-OCV curves are continually changing during cell decay, if directly coulomb algorithm is used to calculate electricity
Tankage, then can be with going to obtain always using the corresponding SOC-OCV curves of new battery the value of Δ SOC, or does not know use
Which SOC-OCV curves go to obtain the value of Δ SOC, and thus will result in the battery capacity obtained using coulomb algorithm has very big mistake
Difference, and then cause the SOH errors calculated very big.And in the present embodiment, every SOC-OCV curve is divided into two parts, is calculated
Per the corresponding SOH in part in different SOC-OCV curves.Then the difference of two parts SOH of every SOC-OCV curve is calculated,
And the SOC-OCV curves of SOH differences minimum are selected to correct the current SOH of battery.The SOC-OCV curves selected by this way
It can guarantee that the SOH errors after correction are minimum.
SOH bearing calibrations are illustrated by way of example below.
Fig. 7 is please referred to, Fig. 7 is a plurality of SOC-OCV curve synoptic diagrams provided in an embodiment of the present invention.In advance to a battery into
Row charge and discharge cycles are tested, and a plurality of SOC-OCV curves are obtained, and the corresponding SOC-OCV songs of different SOH are obtained from selection is wherein passed through
Line.Wherein it is possible to select SOC-OCV curves in a manner of SOH substantially interval 5%.In the embodiment of the present embodiment,
SOH is selected in the range of 80%-100%, thus obtains 6 SOC-OCV curves.As seen from Figure 7, a plurality of SOC-
For OCV curves when SOC is 50% or so, the SOC-OCV curves under different SOH have an intersection point.
Optionally, since minimum remaining capacity is 10% or so in use for battery, the SOC-OCV that measures
Curve corresponding SOC ranging from 10%-100%, the two parts being thus divided into are respectively：10%-50%, 50%-100%.
Fig. 8 is please referred to, Fig. 8 is that SOH provided in an embodiment of the present invention calculates schematic diagram.It calculates in every SOC-OCV curve
SOC is in 10%-50% corresponding SOH1 and SOC in the corresponding SOH2 of 50%-100%.Then every SOC-OCV curve is calculated
The difference of SOH1 and SOH2, and using the average value of the SOH1 and SOH2 of the SOC-OCV curves of difference minimum as correction after
SOH。
In the present embodiment, it is 89.37 to have measured the current SOH of the battery in advance, and after correcting through the above way
The current SOH of battery is 89.37, it can thus be seen that the SOH corrected through the above way is closest to actual value.
Fig. 9 is please referred to, Fig. 9 is the comparison schematic diagram of true SOH provided in an embodiment of the present invention and the SOH of correction.By Fig. 9
In actual value and the SOH after the correction that obtains through the above way comparison it is found that SOH value after being corrected using this programme
For error all within 2%, the SOH after this programme correction has higher accuracy in entire battery life cycle.
Figure 10 is please referred to, Figure 10 is the block diagram of SOH means for correctings 200 provided in an embodiment of the present invention.The SOH
Means for correcting 200 may include the first acquisition module 210, computing module 220 and correction module 230.
Acquisition module 210, for obtaining the corresponding SOC-OCV curves of different SOH.
In the present embodiment, the acquisition module 210 is used to execute the step S110 in Fig. 2, about the acquisition module
210 specific descriptions are referred to the description of step S110 in Fig. 2.
Computing module 220 presets partition strategy by every SOC-OCV curve in a plurality of SOC-OCV curves for basis
It is divided into two parts, and first is calculated according to first SOC corresponding with first electricity in the first electricity and first part
SOH and the 2nd SOH is calculated according to twoth SOC corresponding with second electricity in the second electricity and second part, wherein
First electricity and second electricity are related to battery current state.
Optionally, the computing module 220 according to default partition strategy by every SOC- in a plurality of SOC-OCV curves
OCV curves are divided into two-part mode：
Obtain the intersection point of a plurality of SOC-OCV curves；
Every SOC-OCV curve is divided into two parts according to the intersection point.
Optionally, the computing module 220 is according in the first electricity and first part corresponding with first electricity
One SOC is calculated the first SOH and according to twoth SOC corresponding with second electricity in the second electricity and the second part
The mode that the 2nd SOH is calculated includes：
First voltage corresponding with first electricity is obtained, and is obtained in the first part according to the first voltage
Take first SOC corresponding with the first voltage；
Second voltage corresponding with second electricity is obtained, and is obtained in the second part according to the second voltage
Take twoth SOC corresponding with the second voltage；
The first capacity is calculated according to first electricity and the first SOC, and according to second electricity and
The second capacity is calculated in two SOC；
The first SOH is obtained according to battery initial capacity and first calculation of capacity, and according to battery initial capacity
And second calculation of capacity obtains the 2nd SOH.
In the present embodiment, the computing module 220 is used to execute the step S120 in Fig. 2, about the computing module
220 specific descriptions are referred to the description of step S120 in Fig. 2.
Correction module 230, for being worked as to battery according to the first SOH and the 2nd SOH of every SOC-OCV curve
Preceding SOH is corrected.
Optionally, the correction module 230 includes：
First correction module 231, the first SOH and described second for calculating separately same SOC-OCV curves
The difference of SOH.
Second correction module 232, for the corresponding multiple differences of a plurality of SOC-OCV curves to be compared, with
Obtain the minimal difference in the multiple difference.
Third correction module 233, for according to described the first of SOC-OCV curves corresponding with the minimal difference
SOH current to battery SOH and the 2nd SOH is corrected.
Optionally, 233 module of third correction module is according to SOC-OCV curves corresponding with the minimal difference
First SOH and the 2nd SOH include to the corrected modes of SOH that battery is current：
Calculate the flat of the first SOH and the 2nd SOH of the SOC-OCV curves corresponding with the minimal difference
Mean value；
According to the current SOH of the mean value adjustment battery.
In the present embodiment, the correction module 230 is used to execute the step S130 in Fig. 2, about the correction module
230 specific descriptions are referred to the description of step S130 in Fig. 2.
The embodiment of the present invention also provides a kind of readable storage medium storing program for executing, and executable calculating is stored on the readable storage medium storing program for executing
Machine instructs, and the executable computer instruction realizes the SOH bearing calibrations when being executed by processor.
It will be understood by those skilled in the art that the embodiment of the present invention can be provided as method, apparatus or computer program production
Product.Therefore, in terms of the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware
Embodiment form.Moreover, it wherein includes computer available programs generation that the embodiment of the present invention, which can be used in one or more,
The meter implemented in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code
The form of calculation machine program product.
The embodiment of the present invention be with reference to according to the method for the embodiment of the present invention, equipment (system) and computer program product
Flowchart and/or the block diagram describe.It should be understood that can be realized by computer program instructions in flowchart and/or the block diagram
The combination of flow and/or box in each flow and/or block and flowchart and/or the block diagram.These calculating can be provided
Processing of the machine program instruction to all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
Device is to generate a machine so that the instruction executed by computer or the processor of other programmable data processing devices generates
For realizing the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes
Device.
In conclusion a kind of SOH bearing calibrations of offer of the embodiment of the present invention and device.Battery is obtained first in different SOH
Under a plurality of SOC-OCV curves, then according to presetting partition strategy by every SOC-OCV curve in a plurality of SOC-OCV curves
It is divided into two parts.Then according to first SOC corresponding with first electricity in pre-set first electricity and first part
The first SOH is calculated, according to pre-set to obtain in the second electricity and second part with second electricity corresponding second
The 2nd SOH is calculated in SOC.Wherein, first electricity and second electricity are related to battery current state.Last basis
The SOH that the first SOH and the 2nd SOH of every SOC-OCV curve are current to battery is corrected.Through the above way
SOH is corrected, the SOH after correction has higher accuracy in entire battery life cycle, accurate convenient for driver
Grasp the health status of battery.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of SOH bearing calibrations, which is characterized in that the method includes：
Obtain the corresponding SOC-OCV curves of different SOH；
Every SOC-OCV curve in a plurality of SOC-OCV curves is divided into two parts according to default partition strategy, and according to first
The first SOH is calculated and according to the second electricity and in the first SOC corresponding with first electricity in electricity and first part
The 2nd SOH is calculated in the 2nd SOC corresponding with second electricity in two parts, wherein first electricity and described
Two electricity are related to battery current state；
According to the first SOH and the 2nd SOH of every SOC-OCV curve, the SOH current to battery is corrected.
2. according to the method described in claim 1, it is characterized in that, the first SOH according to every SOC-OCV curve
And the 2nd SOH SOH current to battery is corrected, including：
Calculate separately the difference of the first SOH and the 2nd SOH of same SOC-OCV curves；
The corresponding multiple differences of a plurality of SOC-OCV curves are compared, to obtain the lowest difference in the multiple difference
Value；
It is current to battery according to the first SOH of SOC-OCV curves corresponding with the minimal difference and the 2nd SOH
SOH is corrected.
3. according to the method described in claim 2, it is characterized in that, basis SOC-OCV corresponding with the minimal difference
SOH current to battery the first SOH of curve and the 2nd SOH is corrected, including：
Calculate being averaged for the first SOH and the 2nd SOH of the SOC-OCV curves corresponding with the minimal difference
Value；
According to the current SOH of the mean value adjustment battery.
4. according to the method described in claim 1, it is characterized in that, the basis presets partition strategy by a plurality of SOC-OCV songs
Every SOC-OCV curve in line is divided into two parts, including：
Obtain the intersection point of a plurality of SOC-OCV curves；
Every SOC-OCV curve is divided into two parts according to the intersection point.
5. according to the method described in claim 1, it is characterized in that, it is described according in the first electricity and first part with described
Corresponding first SOC of one electricity is calculated the first SOH and according to electric with described second in the second electricity and the second part
It measures corresponding 2nd SOC and the 2nd SOH is calculated, including：
Obtain corresponding with first electricity first voltage, and obtained in the first part according to the first voltage and
Corresponding first SOC of the first voltage；
Obtain corresponding with second electricity second voltage, and obtained in the second part according to the second voltage and
Corresponding 2nd SOC of the second voltage；
The first capacity is calculated according to first electricity and the first SOC, and according to second electricity and the 2nd SOC
The second capacity is calculated；
The first SOH is obtained according to battery initial capacity and first calculation of capacity, and according to battery initial capacity and institute
It states the second calculation of capacity and obtains the 2nd SOH.
6. a kind of SOH means for correctings, which is characterized in that described device includes：
Acquisition module, for obtaining the corresponding SOC-OCV curves of different SOH；
Computing module, for every SOC-OCV curve in a plurality of SOC-OCV curves to be divided into two according to default partition strategy
Point, and according to first SOC corresponding with first electricity in the first electricity and first part be calculated the first SOH and according to
The 2nd SOH is calculated in the 2nd SOC corresponding with second electricity in second electricity and second part, wherein described first
Electricity and second electricity are related to battery current state；
Correction module, for according to SOH the first SOH and the 2nd SOH of every SOC-OCV curve current to battery
It is corrected.
7. device according to claim 6, which is characterized in that the correction module includes：
First correction module, the difference of the first SOH and the 2nd SOH for calculating separately same SOC-OCV curves
Value；
Second correction module, it is described to obtain for being compared the corresponding multiple differences of a plurality of SOC-OCV curves
Minimal difference in multiple differences；
Third correction module, for according to the first SOH of SOC-OCV curves corresponding with the minimal difference and described
SOH current to battery 2nd SOH is corrected.
8. device according to claim 7, which is characterized in that the third correction module according to the minimal difference
The first SOH of corresponding SOC-OCV curves and the 2nd SOH include to the corrected modes of SOH that battery is current：
Calculate being averaged for the first SOH and the 2nd SOH of the SOC-OCV curves corresponding with the minimal difference
Value；
According to the current SOH of the mean value adjustment battery.
9. device according to claim 6, which is characterized in that the computing module will be a plurality of according to default partition strategy
Every SOC-OCV curve in SOC-OCV curves is divided into two-part mode and includes：
Obtain the intersection point of a plurality of SOC-OCV curves；
Every SOC-OCV curve is divided into two parts according to the intersection point.
10. device according to claim 6, which is characterized in that the computing module is according to the first electricity and first part
Interior first SOC corresponding with first electricity be calculated the first SOH and according in the second electricity and the second part with
The mode that the 2nd SOH is calculated in corresponding 2nd SOC of second electricity includes：
Obtain corresponding with first electricity first voltage, and obtained in the first part according to the first voltage and
Corresponding first SOC of the first voltage；
Obtain corresponding with second electricity second voltage, and obtained in the second part according to the second voltage and
Corresponding 2nd SOC of the second voltage；
The first capacity is calculated according to first electricity and the first SOC, and according to second electricity and the 2nd SOC
The second capacity is calculated；
The first SOH is obtained according to battery initial capacity and first calculation of capacity, and according to battery initial capacity and institute
It states the second calculation of capacity and obtains the 2nd SOH.
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