CN104569827B - Battery management system and its application method - Google Patents
Battery management system and its application method Download PDFInfo
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- CN104569827B CN104569827B CN201410348894.3A CN201410348894A CN104569827B CN 104569827 B CN104569827 B CN 104569827B CN 201410348894 A CN201410348894 A CN 201410348894A CN 104569827 B CN104569827 B CN 104569827B
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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
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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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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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The present invention relates to battery management system, including：Storage part, preserves the voltage and electric current of input, preserves the interval OCV data by SOC of specific OCV and maps；1SOC speculative computations portion, current value is less than critical electric current value and magnitude of voltage is present in the situation particular range set in advance in, and 1SOC values are speculated using the OCV data mapping by SOC；SOH speculative computations portion, judges to perform the situation of charging with constant current, calculating calculates battery according to the quantity of electric charge of SOC rates of change and speculates capacity, and SOH value is relatively speculated with initial cell Capacity Ratio；2SOC speculative computations portion, the magnitude of voltage for being stored in storage part is not present within particular voltage range, or it is more than critical value situation to be stored in the current value of storage part, 2SOC values are speculated according to the integrating for the current value that capacity is speculated using battery, the present invention is by the interval speculative computation amendment hammings of SOC twice, reduction required time and expense.
Description
Technical field
The present invention relates to battery management system and its application method, the battery management system being related in more detail and its fortune
It is that execution speculates SOC (State Of Charge, charged state) and SOH, and (State Of Health, battery is good for method
Kang Du).
Background technology
In general, electric automobile or mixed power electric car utilize the power supply for being stored in battery in electric Drive Mode
To drive automobile.
Further, electric automobile or mixed power electric car can speculate SOC (State Of by battery management system
) and SOH (State Of Health) Charge.
By an example, the voltage of battery is measured in battery charging and discharging, is speculated from the voltage of measurement in no load condition
Battery opens voltage, with reference to the method for SOC of the SOC tables mapping equivalent to the opening voltage of supposition by open voltage.
But, when carrying out the discharge and recharge of battery, existed according to the voltage of IR pressure drop effect batteries and virtual voltage very big
Difference, if therefore do not correct this error, have the shortcomings that correct SOC can not be obtained.
For reference, IR pressure drop phenomenas refer to that battery is connected to load and starts to discharge or filled since external power source to battery
Voltage phenomenon jumpy when electric.That is, start electric discharge when cell voltage drastically decline, when starting to charge up voltage drastically on
Rise.
By another example, there are the charging and discharging currents for calculating battery to speculate the SOC of battery method, its method is tired because continuing
The measurement error occurred during electric current is measured is counted, over time by there is the problem of SOC correctness declines.
On the other hand, there is SOH as another parameter of display battery status in addition to above-mentioned SOC.SOH is as fixed
Amount display because aging (aging) effect battery capacity characteristic variations parameter, it is known that the degradation in capacity of battery to what
Degree, therefore if it is known that SOH can replace battery in reasonable time point, according to the discharge and recharge of the useful life regulating cell of battery
Capacity, can prevent overcharging and over-discharge for battery.
The internal resistance change of battery, therefore the known inside according to battery are reflected in during the change of battery capacity characteristic
Resistance can speculate SOH with temperature.That is, measured and held by the internal resistance of battery with the battery of each temperature by charge-discharge test
Amount.
By the capacity relative number value of measurement on the basis of the initial capacity of battery, and then it can obtain to map SOH's
Table look-up, in the environment measurement battery internal resistance and temperature of actual use battery, if corresponding to internal electricity from the mapping of tabling look-up
Resistance and the SOH of temperature, then can speculate SOH.
But, by the SOC estimation methods of integrating electric current, speculate by the SOC variable quantities of supposition and with SOC-OCV tables
The ratio of SOC variable quantities, until the correlation for building hamming convergency value and battery capacity is tabled look-up, existing needs for a long time
The problem of with expense.Especially, SOC 50 below according to thermalization voltage properties it is different, according to its SOC-OCV table look-up by with
Many errors.
(prior art literature)
(patent document)
Patent document KR10-2010-0019249A
The content of the invention
(the problem of solving)
The present invention provides battery management system and its purpose of application method is, to improve existing SOC in software manner
(State Of Charge) estimation method, and then time required during reduction supposition and expense, and it is correct to improve supposition
Degree.
(means for solving problem)
It is characterised by for the battery management system according to one side of the present invention of reaching the purpose, including：Sensor
Portion, the magnitude of voltage and current value of its induced cell；
Storage part, it preserves the voltage and current value of sensing, and preserves the specific OCV (Open set in advance
Circuit Voltage) the interval OCV data mapping by SOC (State Of Charge, charged state)；1SOC speculates
Calculating part, if the magnitude of voltage of the sensing is met within the particular voltage range set in advance, the current value of the sensing is less than
Critical electric current value, then it is mapped using the OCV data by SOC speculates 1SOC values；And 2SOC speculative computations portion, it is described
The magnitude of voltage of sensing is unsatisfactory within the particular voltage range that sets in advance, or the current value of the sensing is more than critical current
It is worth, then its current value sensed according to integrating speculates 2SOC values.
In addition, this battery management system also includes controller portion, it is to set the 1SOC values or described the in advance
The interval of 2SOC values, obtains the data point in the number set in advance, using hamming speculate the correspondence 1SOC values or
The final SOC value of the 2SOC values.
In addition, this battery management system may also include SOH speculative computations portion, if performing charging with constant current, it is counted
Calculate the quantity of electric charge according to SOC rates of change and then calculate the supposition capacity of battery, SOH (State are relatively speculated with initial cell Capacity Ratio
Of Health) value.
In addition, being asked during the scheduled time with SOC and the quantity of electric charge rate of change after the battery speculates capacity, Chu Yisuo
Initial cell capacity is stated to take percentage to calculate the SOH value.
In addition, the current value divided by integral battery door capacity that are inputted during the integration unit interval speculate the 2SOC values.
The 2SOC values can be calculated according to mathematical expression 1.
Mathematical expression 1：
(herein, SOC (n-1)：N-1 2SOC values, SOC (n)：N 2SOC values, I：Electric current (A), t：Time
(s)、C：Battery capacity (Ah)).
The final SOC value, the mathematics being averaging according to each proportion is multiplied by the data point (a, b, c, d, e)
Formula 2, calculates the final SOC value.
Mathematical expression 2：
Final SOC value=1/16*a+4/16*b+6/16*c+4/16*d+1/16*e
=0.0625 (a+e)+0.25 (b+d)+0.375c
In addition, the OCV by SOC (Stat Of Charge), if SOC be it is predetermined more than if its have not by temperature and
The specific eigenvalue of thermalization influence.
In addition, 2SOC speculative computations portion speculates that capacity considers electricity according to the battery calculated in the SOH speculative computations portion
Pond thermalization, thus it is speculated that the 2SOC.
The application method of the battery management system according to another side of the present invention to reach the purpose is characterised by,
Including：Sensing step, the magnitude of voltage and current value of induced cell；Step is preserved, the voltage and current value of sensing are stored in and deposited
Storage portion, and preserve the specific OCV (Open Circuit Voltage) that sets in advance it is interval by SOC (Stat Of
Charge OCV data mapping)；The step of speculative computation 1SOC, if the magnitude of voltage of the sensing meets the spy set in advance
Determine within voltage range, the current value of the sensing is less than critical electric current value, then pushed away using described by SOC OCV data mapping
Survey 1SOC values；And the step of speculative computation 2SOC, if the magnitude of voltage of the sensing is unsatisfactory for the specific voltage set in advance
Within scope, or the current value of the sensing is more than critical electric current value, then the current value sensed according to integrating speculates 2SOC values.
In addition, the step of application method of this battery management system also includes speculating final SOC value, to set institute in advance
The interval of 1SOC values or the 2SOC values is stated, the data point in the number set in advance is obtained, is speculated using hamming
The step of final SOC value of the correspondence 1SOC values or the 2SOC values.
In addition, the step of application method of this battery management system also includes speculative computation SOH, if being performed with constant current
Charging, then calculate the quantity of electric charge according to SOC rates of change and then calculate battery supposition capacity, relatively speculate with initial cell Capacity Ratio
SOH (State Of Health) value.
In addition, ask the battery to speculate capacity with SOC and the quantity of electric charge rate of change during the scheduled time, divided by it is described first
Phase battery capacity takes percentage to calculate the SOH value.
In addition, described calculate the step of speculating 2SOC, pushed away according to the battery calculated the step of the calculating speculates SOH
Survey capacity and consider battery thermalization, thus it is speculated that the 2SOC.
(The effect of invention)
It is identical with this, even if the present invention considers that thermalization is carried out to a certain extent on battery behavior, in predetermined charging shape
State plays this point that electromotive force will not change, and is applicable in charging by the interval bands of specific SOC (Stage Of Charge)
2 kinds of speculative computations and the hamming changed, thus it is speculated that final charged state and thermalization state, and then reduce compared to existing
Time and expense needed for speculating on SOC, and supposition correctness can be improved.
Brief description of the drawings
Fig. 1 is the block diagram of battery management system according to an embodiment of the invention.
Fig. 2 is illustrated according to the OCV (Open Circuit Voltage) by SOC by testing the capacity thermalization obtained
Figure.
Fig. 3 be according to one embodiment of the invention, in order to illustrate speculate battery management system final SOC value drawing.
Fig. 4 is according to one embodiment of the invention, for the flow chart of the action that illustrates battery management system.
(description of reference numerals)
10：Sensor portion 11：Voltage sensor
12：Current sensor 30：Storage part
40：1SOC speculative computations portion 50：2SOC speculative computations portion
60：SOH speculative computations portion 70：Controller portion
Specific embodiment mode
The present invention as described below referring to the drawings, herein by omit explanation repeatedly, to it is unnecessary make the present invention will
Lose count of the detailed description of the known function and composition of Chu.The embodiment of the present invention is in order to in the industry cycle with average knowledge
The technical staff more complete explanation present invention and provide, therefore be shown in drawing in order to which explanation definitely can be exaggerated
The form and dimension of key element etc..
Fig. 1 is the block diagram of battery management system according to an embodiment of the invention.Reference picture 1, according to the electricity of the present embodiment
Pond management system may include sensor portion 10, storage part 30,1SOC speculative computations portion 40, SOH speculative computations portion 60,2SOC
Speculative computation portion 50, controller portion 70.
Storage part 30, according in order to sense from high-voltage battery (B) input voltage and electric current sensor portion 10, can hold
Row preserves the function of the magnitude of voltage inputted respectively and current value.Sensor portion 10, by voltage sensor 11 and current sensor 12
Constitute.
In storage part 30, save in the interval OCV by SOC of specific OCV (Open Circuit Voltage) in advance
(Open Circuit Voltage) data map.
1SOC speculative computations portion 40, in the current value for judging to be stored in storage part 30 less than critical electric current value, preservation
Magnitude of voltage is present in the situation particular range set in advance in, is mapped using the OCV data by SOC for being stored in storage part 30
1SOC values can be speculated.
SOH speculative computations portion 60, is judging, with the situation of constant current straight trip charging, to calculate the electricity according to SOC rates of change
Lotus amount and then calculating battery supposition capacity, SOH (State Of Health) value S220 can be speculated by being compared with initial capacity.
Using the OCV data mapping conversion SOC (State Of Charge) by SOC come after speculating SOC value, with basis
The quantity of electric charge ratio that SOC changes during the scheduled time asks the capacity of present battery to speculate SOH (State Of Health) value.
2SOC speculative computations portion 50, is not stored at the specific voltage set in advance in the magnitude of voltage for being stored in storage part 30
In the range of, or it is the situation more than the critical electric current value set in advance to be stored in the current value of storage part 30, using according to SOH
The battery that speculative computation portion 60 is calculated speculates capacity, and 2SOC values can be speculated by measuring electric current according to integrating.
Controller portion 70, to be set in the 1SOC values of the supposition of 1SOC speculative computations portion 40 in advance or pushed away in 2SOC
The interval (for example, 1 second is spaced) for surveying the 2SOC values that calculating part 50 speculates obtains 5 data points, can be speculated using hamming
The final SOC value of correspondence 1SOC values or 2SOC values.
In addition, controller portion 70 is with the interval acquiring 5 for setting the SOH value according to the supposition of SOH speculative computations portion 60 in advance
Individual data point, final SOH value can be speculated using hamming.
Controller portion 70, can the built-in work(that the final SOC value speculated as described above and final SOH value are shown to user
Energy.
Hereinafter, having to 1SOC speculative computations portion 40, SOH speculative computations portion 60 and 2SOC speculative computations portion 50
Body explanation.
1SOC speculative computations portion 40, to carry out charge or discharge below critical low current when vehicle is run, voltage is existed
The voltage measured when specific interval, 1SOC values can be speculated suitable for the OCV data mapping by SOC by being identified with OCV.
That is, 1SOC speculative computations portion 40, the magnitude of voltage of measurement is in the particular voltage range set in advance, the electricity of measurement
Flow valuve is less than the situation at the critical electric current value set in advance, and it is applied to be stored in reflecting by SOC OCV data for storage part 30
1SOC values can be speculated by penetrating.
For the high-voltage battery of electric vehicle, thermalization is carried out but according to heat by useful life and the very big influence of temperature
Change degree reduces the active volume of battery, but the intrinsic OCV values of battery are interval not by temperature in particular battery charged state (SOC)
Degree and thermalization influence have specific eigenvalue.
Fig. 2 is according to by testing the capacity thermalization obtained, by SOC OCV schematic diagrames.Reference picture 2, according to capacity thermalization
In more than SOC60% interval, not changing by SOC OCV values for battery pack is confirmed, is consistent.
SOH speculative computations portion 60 performs charging with constant current, the state at this moment charged in specific SOC intervals
Situation, calculates the quantity of electric charge according to SOC rates of change and then can calculate battery specified vol, SOH can be speculated by being compared with initial capacity
Value.
Speculate the formula such as mathematical expression 1 of battery capacity.
【Mathematical expression 1】
SOH value is the thermalization degree shown battery meter, and battery is sought with the rate of change of SOC and the quantity of electric charge during the scheduled time
Speculate capacity (C') afterwards divided by initial capacity C takes percentage to calculate SOH value.As mathematical expression 2 can calculate SOH value.
【Mathematical expression 2】
2SOC speculative computations portion 50, capacity is speculated based on the battery calculated according to SOH speculative computations portion 60, can speculate the
2SOC values.That is, 2SOC speculative computations portion 50 by consider battery thermalization holder portion 30 preserve current value integrating,
2SOC values can be calculated.
2SOC speculative computations portion 50, according to the current value divided by integral battery door capacity that input during the integration unit interval,
The 2SOC values that can be changed during the unit of account time.That is, if if mathematical expression 3 is in n-1 SOC (n-1) plus instantaneous variation SOC
Value, then can speculate the 2SOC values of n times.
(mathematical expression 3)
(herein, I：Electric current (A), t：Time (s), C：Battery capacity (Ah))
2SOC speculative computations portion 50, speculates that capacity speculates the using the battery calculated according to SOH speculative computations portion 60
2SOC values, therefore it is contemplated that battery capacity thermalization in 2SOC values are speculated.
Controller portion 70, so that in the data point of the number set in advance, acquisition speculates according to 1SOC speculative computations portion 40
1SOC values or according to 2SOC speculative computations portion 50 speculate 2SOC values be applied to hamming, and then can speculate finally
SOC value.
Controller portion 70, obtained with 5 data points the 1SOC values that are speculated according to 1SOC speculative computations portion 40 or according to
The 2SOC values that 2SOC speculative computations portion 50 speculates, applicable hamming can speculate final SOC value.
If Fig. 3 is the hamming of the data point (a, b, c, d, e) of 5.If mathematical expression 4 is in the SOC data points of 5 suppositions
(a, b, c, d, e), which is multiplied by each proportion and be averaging, can finally speculate final SOC value.
【Mathematical expression 4】
Final SOC value=1/16*a+4/16*b+6/16*c+4/16*d+1/16*e
=0.0625 (a+e)+0.25 (b+d)+0.375c
Hereinafter, reference picture 4 is illustrated to the application method of battery management system according to an embodiment of the invention.
Battery management system, according to the voltage sensor 11 and current sensor 12 for induced voltage and electric current, measurement
The magnitude of voltage and current value S110 inputted respectively.
Battery management system, the magnitude of voltage of measurement S120, the electric current of measurement within the particular voltage range set in advance
Value is less than the situation S130 at the critical electric current value set in advance, and it is applied to reflect by SOC OCV data what is set in advance
Penetrate supposition 1SOC values S140.
Battery management system, after the control flow of the present invention is started, judges to perform the situation of charging with constant current
S210, i.e., the situation of the state charged within specific SOC scopes calculates the quantity of electric charge and then meter according to SOC rates of change
Calculate battery and speculate capacity, with initial cell Capacity Ratio compared with SOH (State Of Health) value S220 can be speculated.Number described above
Formula 1 and mathematical expression 2 can perform the supposition of SOH value.
Battery management system, the magnitude of voltage of measurement is not present in the S120 in the particular voltage range set in advance, or surveys
Amount current value is the situation S130 more than the critical electric current value set in advance, is speculated using the battery calculated according to S220 steps
Capacity, 2SOC values S150 is speculated according to the integrating of measurement electric current.Pushing away for 2SOC values can perform according to above-mentioned mathematical expression 3
Survey.
That is, the current value divided by integral battery door capacity inputted according to integration during the unit interval, according to calculating in unit
The SOC value changed during time can seek 2SOC values.
Battery management system, to set according to performing 1SOC values that S140 steps or S150 steps speculate or the in advance
The interval of 2SOC values, is obtained in the data point set in advance, and correspondence 1SOC values or 2SOC values are speculated using hamming
Final SOC value S160.
Battery management system, to set the interval of the SOH value speculated according to S220 steps in advance, acquisition is being set in advance
Data point, utilize hamming to speculate final SOH value S230.Battery management system, the final SOC speculated is shown to user
Value and final SOH value S300.
It is identical with this, according to the battery management system and its application method of the present embodiment, even if the thermalization on battery behavior
Carry out to a certain extent, in view of playing the indeclinable this point of electromotive force in predetermined charge state, be applicable in charging by spy
The hamming determined 2 kinds of speculative computations of scope SOC (Stage Of Charge) scope and changed, thus it is speculated that final charged state
And thermalization state, and then reduce required time and expense when speculating SOC compared to existing, and supposition can be improved just
Exactness.
Battery management system and its application method according to an embodiment of the invention, are not restricted to the implementation in described above
The composition and method of example, according to optionally combination constitutes all or part of of embodiment the need for user.
This is illustrated according to the specific item such as specific inscape etc. and the embodiment and drawing of restriction as described above
Invention, but this is only in order to what is more contributed to the understanding present invention and provide, the present invention is not restricted to described implementation
Example, the technical staff in the field belonging to the present invention with usual knowledge can carry out various modification and deformation from this record.
Claims (16)
1. a kind of battery management system, it is characterised in that including：
Sensor portion, the magnitude of voltage and current value of its induced cell；
Storage part, it preserves the magnitude of voltage and current value of sensing, and preserves the specific open-circuit voltage OCV intervals set in advance
Mapped by charged state SOC OCV data；
1SOC speculative computations portion, if the magnitude of voltage of the sensing is met within the particular voltage range set in advance, the sense
The current value answered is less than critical electric current value, then it speculates 1SOC values using the OCV data mapping by the SOC；And
2SOC speculative computations portion, the magnitude of voltage of the sensing is unsatisfactory within the particular voltage range that sets in advance, or described
The current value of sensing is more than critical electric current value, then its current value sensed according to integrating speculates 2SOC values.
2. battery management system according to claim 1, it is characterised in that also include：
Controller portion, it is obtained and set in advance to set the interval of the 1SOC values or the 2SOC values in advance
The data point of number, the final SOC value of the correspondence 1SOC values or the 2SOC values is speculated using hamming.
3. battery management system according to claim 1, it is characterised in that also include：
SOH speculative computations portion, if performing charging with constant current, calculates the quantity of electric charge charged during the scheduled time, by described
The ratio calculation battery of SOC rates of change speculates capacity during the quantity of electric charge of charging and the scheduled time, with initial cell capacity
Compare supposition battery health degree SOH value, the SOH value asks described during the scheduled time with SOC and the quantity of electric charge rate of change
Battery is speculated after capacity, divided by the initial cell capacity takes percentage to calculate the SOH value.
4. battery management system according to claim 1, it is characterised in that
The 2SOC values, the current value divided by integral battery door capacity inputted during the integration unit interval speculates the 2SOC
Value.
5. battery management system according to claim 4, it is characterised in that
The 2SOC values, the 2SOC values are calculated according to mathematical expression 1,
Mathematical expression 1：
Herein, SOC (n-1)：N-1 2SOC values, SOC (n)：N 2SOC values, I：Electric current (A), t：Time (s), C：It is whole
Body battery capacity (Ah).
6. battery management system according to claim 2, it is characterised in that
The final SOC value, the mathematical expression 2 being averaging according to each proportion is multiplied by the data point (a, b, c, d, e),
The final SOC value is calculated,
Mathematical expression 2：
Final SOC value=1/16*a+4/16*b+6/16*c+4/16*d+1/16*e
=0.0625 (a+e)+0.25 (b+d)+0.375c.
7. battery management system according to claim 2, it is characterised in that
The OCV by SOC, it has the specific eigenvalue not influenceed by temperature and thermalization if being to make a reservation for above if SOC.
8. battery management system according to claim 3, it is characterised in that
The 2SOC speculative computations portion, it speculates that capacity considers battery according to the battery calculated in the SOH speculative computations portion
Thermalization, thus it is speculated that the 2SOC values.
9. a kind of application method of battery management system, it is characterised in that including：
Sensing step, the magnitude of voltage and current value of induced cell；
Step is preserved, the magnitude of voltage and current value of sensing are stored in storage part, and it is interval to preserve the specific OCV set in advance
By SOC OCV data map；
The step of speculative computation 1SOC, if the magnitude of voltage of the sensing is met within the particular voltage range set in advance, institute
The current value for stating sensing is less than critical electric current value, then is mapped using the OCV data by SOC and speculate 1SOC values；And
The step of speculative computation 2SOC values, if the magnitude of voltage of the sensing be unsatisfactory for the particular voltage range that sets in advance with
It is interior, or the current value of the sensing is more than critical electric current value, then the current value sensed according to integrating speculates 2SOC values.
10. the application method of battery management system according to claim 9, it is characterised in that also include：
The step of speculating final SOC value, to set the interval of the 1SOC values or the 2SOC values in advance, is obtained in thing
The data point of the number of preceding setting, the final SOC of the correspondence 1SOC values or the 2SOC values is speculated using hamming
The step of value.
11. the application method of battery management system according to claim 9, it is characterised in that also include：
The step of speculative computation SOH, if performing charging with constant current, the quantity of electric charge charged during the scheduled time is calculated, is passed through
The ratio calculation battery of SOC rates of change speculates capacity during the quantity of electric charge of the charging and the scheduled time, with initial cell
Capacity Ratio relatively speculates SOH value,
The SOH value, asks the battery to speculate capacity during the scheduled time with SOC and the quantity of electric charge rate of change, divided by described
Initial cell capacity takes percentage to calculate the SOH value.
12. the application method of battery management system according to claim 9, it is characterised in that
The 2SOC values, according to the current value divided by integral battery door capacity that input during the integration unit interval, thus it is speculated that described the
2SOC values.
13. the application method of battery management system according to claim 12, it is characterised in that
The 2SOC values, can calculate the 2SOC values according to mathematical expression 1,
Mathematical expression 1：
Herein, SOC (n-1)：N-1 2SOC values, SOC (n)：N 2SOC values, I：Electric current (A), t：Time (s), C：It is whole
Body battery capacity (Ah).
14. the application method of battery management system according to claim 10, it is characterised in that
The final SOC value, is calculated according to the mathematical expression 2 for the proportion averaging that each is multiplied by described data point a, b, c, d, e
The final SOC value,
Mathematical expression 2：
Final SOC value=1/16*a+4/16*b+6/16*c+4/16*d+1/16*e
=0.0625 (a+e)+0.25 (b+d)+0.375c.
15. the application method of battery management system according to claim 10, it is characterised in that
The OCV by SOC, it has the specific eigenvalue not influenceed by temperature and thermalization if being to make a reservation for above if SOC.
16. the application method of battery management system according to claim 11, it is characterised in that
The step of speculative computation 2SOC values, capacity is speculated according to the battery calculated the step of the speculative computation SOH
Consider battery thermalization, thus it is speculated that the 2SOC values.
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