CN108663621A - A kind of the state-of-charge computational methods and system of power battery pack - Google Patents
A kind of the state-of-charge computational methods and system of power battery pack Download PDFInfo
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- CN108663621A CN108663621A CN201710200054.6A CN201710200054A CN108663621A CN 108663621 A CN108663621 A CN 108663621A CN 201710200054 A CN201710200054 A CN 201710200054A CN 108663621 A CN108663621 A CN 108663621A
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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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Abstract
The present invention provides a kind of the state-of-charge computational methods and system of power battery pack, it calculates separately to obtain the ampere-hour state-of-charge of power battery pack by current integration method and open circuit voltage method and estimates state-of-charge, then ampere-hour state-of-charge is modified by judging ampere-hour state-of-charge with whether the difference for estimating state-of-charge meets default correction conditions, if not correcting, then think that ampere-hour state-of-charge is accurate and directly using ampere-hour state-of-charge as the practical state-of-charge of power battery pack, if correcting, then using revised ampere-hour state-of-charge as the practical state-of-charge of power battery pack, generated error in state-of-charge calculating process can be corrected in time, it effectively improves the computational accuracy of state-of-charge and calculation amount is small, it is easily achieved.
Description
Technical field
The embodiment of the present invention belongs to power battery technical group field more particularly to a kind of state-of-charge meter of power battery pack
Calculate method and system.
Background technology
With the continuous development and progress of power battery pack technology, power battery pack is widely used in electric vehicle, electricity
The equipment such as dynamic train, electric bicycle, golf cart.During the use of power battery pack, need to power battery pack
It is effectively managed, to ensure that power battery pack can work in normal state, to extend its service life.Power battery
The state-of-charge (State of Charge, SOC) of group is one of the important parameter for weighing power battery pack working condition, accurately
Calculating power battery pack state-of-charge, to effectively prevent power battery pack to overcharge or over-discharge, improve power electric
The security performance of pond group, the service life for extending power battery pack play a crucial role.
However, being typically by open circuit voltage method, current integration method, internal resistance method, neural network or Kalman's filter at present
Wave method calculates the state-of-charge of power battery pack, these algorithms in the long-term use will appear cumulative errors and single
A kind of method of only use is relatively low to calculate state-of-charge computational accuracy, effective for a long time can not accurately calculate power battery pack
State-of-charge.
Invention content
The embodiment of the present invention provides a kind of the state-of-charge computational methods and system of power battery pack, can correct lotus in time
Generated error in electricity condition calculating process effectively improves the computational accuracy of state-of-charge and calculation amount is small, is easily achieved.
On the one hand the embodiment of the present invention provides a kind of state-of-charge computational methods of power battery pack comprising：
Obtain the current flow, current highest monomer voltage, current minimum monomer voltage, initial lotus of the power battery pack
Electricity condition and initial nominal capacity；
According to the current flow, the initial state-of-charge and the initial nominal capacity, pass through current integration method meter
Calculate the ampere-hour state-of-charge of the power battery pack；
According to the current flow, the current highest monomer voltage, the current minimum monomer voltage, default OCV-
SOC curves and predetermined DC internal resistance table estimate state-of-charge by what open circuit voltage method calculated the power battery pack；
It, will be described if the ampere-hour state-of-charge and the difference for estimating state-of-charge are unsatisfactory for default correction conditions
Practical state-of-charge of the ampere-hour state-of-charge as the power battery pack；Otherwise according to default correction factor to the ampere-hour lotus
Electricity condition is modified, and is stopped when the revised ampere-hour state-of-charge estimates state-of-charge more than described in, and will be corrected
Practical state-of-charge of the ampere-hour state-of-charge as the power battery pack afterwards.
On the other hand the embodiment of the present invention also provides a kind of state-of-charge computing system of power battery pack comprising：
Parameter acquiring unit, for obtain the current flow of the power battery pack, current highest monomer voltage, it is current most
Low monomer voltage, initial state-of-charge and initial nominal capacity；
Ampere-hour state-of-charge computing unit, for according to the current flow, the initial state-of-charge and described initial
Nominal capacity calculates the ampere-hour state-of-charge of the power battery pack by current integration method；
Estimate state-of-charge computing unit, for according to the current flow, the current highest monomer voltage, described work as
Preceding minimum monomer voltage, default OCV-SOC curves and predetermined DC internal resistance table, the power battery is calculated by open circuit voltage method
Group estimates state-of-charge；
Practical state-of-charge determination unit, if not for the ampere-hour state-of-charge and the difference for estimating state-of-charge
Meet and preset correction conditions, then using the ampere-hour state-of-charge as the practical state-of-charge of the power battery pack；Otherwise root
The ampere-hour state-of-charge is modified according to default correction factor, until the revised ampere-hour state-of-charge is more than described
Stop when estimating state-of-charge, and using the revised ampere-hour state-of-charge as the charged shape of the reality of the power battery pack
State.
The embodiment of the present invention calculates separately to obtain the ampere-hour lotus of power battery pack by current integration method and open circuit voltage method
Electricity condition and estimate state-of-charge, then by judge ampere-hour state-of-charge and estimate the difference of state-of-charge whether meet it is default
Correction conditions are modified ampere-hour state-of-charge, if not correcting, then it is assumed that ampere-hour state-of-charge is accurate and directly will
Practical state-of-charge of the ampere-hour state-of-charge as power battery pack, if correct, using revised ampere-hour state-of-charge as
The practical state-of-charge of power battery pack can correct generated error in state-of-charge calculating process, effectively improve in time
The computational accuracy and calculation amount of state-of-charge are small, are easily achieved.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the basic procedure frame of the state-of-charge computational methods for the power battery pack that one embodiment of the present of invention supplies
Figure；
As Fig. 2 be one embodiment of the present of invention provide measure power battery pack at different temperatures previously according to experiment
Temperature compensation coefficient figure；
As Fig. 3 be one embodiment of the present of invention provide previously according to the power battery pack that measures of experiment at 25 DEG C
The different multiplying charge graph of different multiplying discharge curve and power battery pack at 23 DEG C；
If Fig. 4 is the default OCV- for measuring power battery pack previously according to experiment that one embodiment of the present of invention provides
SOC curves；
It is the equivalent-circuit model under the power battery pack working condition that one embodiment of the present of invention provides such as Fig. 5；
As Fig. 6 be one embodiment of the present of invention provide previously according to the power battery pack that measures of experiment in charge and discharge
The relational graph that electric current and terminal voltage in journey change over time；
Fig. 7 is the idiographic flow block diagram for the step S30 that one embodiment of the present of invention provides；
Fig. 8 is the idiographic flow block diagram for the step S40 that one embodiment of the present of invention provides；
Fig. 9 is the flow diagram of the state-of-charge computational methods for the power battery pack that one embodiment of the present of invention provides；
Figure 10 is the flow diagram of the state-of-charge computational methods for the power battery pack that one embodiment of the present of invention provides；
Figure 11 is the basic structure of the state-of-charge computing system for the power battery pack that one embodiment of the present of invention provides
Block diagram；
Figure 12 is the structure diagram for estimating state-of-charge computing unit 30 that one embodiment of the present of invention provides；
Figure 13 is the structure diagram for the practical state-of-charge determination unit 40 that one embodiment of the present of invention provides；
Figure 14 is the structure diagram of the state-of-charge computing system for the power battery pack that one embodiment of the present of invention provides；
Figure 15 is the structure diagram of the state-of-charge computing system for the power battery pack that one embodiment of the present of invention provides.
Specific implementation mode
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention are explicitly described, it is clear that described embodiment is the present invention one
The embodiment divided, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, should all belong to the scope of protection of the invention.
Term " comprising " in description and claims of this specification and above-mentioned attached drawing and their any deformations, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising series of steps or unit, product or equipment do not have
It is defined in the step of having listed or unit, but further includes the steps that optionally not listing or unit, or optionally also wrap
It includes for the intrinsic other steps of these processes, method, product or equipment or unit.In addition, term " first ", " second " and
" third " etc. is for distinguishing different objects, not for description particular order.
As shown in Figure 1, one embodiment of the present of invention provides a kind of state-of-charge computational methods of power battery pack, packet
It includes：
Step S10：Obtain the current flow, current highest monomer voltage, current minimum monomer electricity of the power battery pack
Pressure, initial state-of-charge and initial nominal capacity.
In the present embodiment, current flow refers to the electric current for flowing through power battery pack obtained at current time；Current highest
Monomer voltage refers to the voltage of the highest single battery of current voltage in multiple single batteries included by power battery pack；Currently
Minimum monomer voltage refers to the voltage of the minimum single battery of current voltage in multiple single batteries included by power battery pack；
Initial state-of-charge refers to the state-of-charge of the power battery pack got at current time；Initial nominal capacity refers to current time
The nominal capacity of the power battery pack got.
Step S20：According to the current flow, the initial state-of-charge and the initial nominal capacity, pass through ampere-hour
Integration method calculates the ampere-hour state-of-charge of the power battery pack.
It in a particular application, can be according to the calculation formula of current integration method： Calculate power battery pack
Ampere-hour state-of-charge；
Wherein, SOC(K)State-of-charge for power battery pack at the K moment, in the present embodiment, SOC(K)As power electric
The ampere-hour state-of-charge SOC of pond groupAH；SOC(K-1)State-of-charge for power battery pack at the K-1 moment, in the present embodiment,
SOC(K-1)As initial state-of-charge SOC0；I is the instantaneous value of the operating current of power battery pack, i when power battery pack is discharged
Positive value is taken, i takes negative value when power battery pack charges, and in the present embodiment, i is current flow I；kLFor known power battery
The aging coefficient of group；kIIt, can by different multiplying discharge curve known to inquiry or not for the charge-discharge magnification corresponding to i
Same multiplying charge graph obtains；kTFor temperature compensation coefficient, can be obtained by temperature compensation coefficient figure known to inquiry；QO
For the initial nominal capacity of power battery pack；DHQKThe total discharge electricity amount of history for power battery pack by the K moment；DHQK-1For
The total discharge electricity amount of history of the power battery pack by the K-1 moment；CHQKHistory for power battery pack by the K moment always charges electricity
Amount；CHQK-1The total charge capacity of history for power battery pack by the K-1 moment；In the present embodiment, K is current time.
As shown in Fig. 2, to measure the temperature compensation coefficient figure of power battery pack at different temperatures previously according to experiment, have
Body experimentation is as follows：
1, several consistency height, the production of same batch and the identical power battery pack of model are chosen, by these power batteries
Group it is fully charged to state-of-charge be 100%, then by these power battery packs stand a period of time；In a particular application, currently
The number and time of repose of power battery pack in step can be selected according to actual needs, in this experimentation preferably when
The number of power battery pack in preceding step is 12, and time of repose is 4 hours；
2, these power battery packs after standing are respectively placed in different temperature environments, with certain velocity of discharge
Stop when constant-current discharge to certain voltage, measures the discharge electricity amount of each power battery pack at this time respectively；In a particular application, when
The voltage after temperature environment, the velocity of discharge and electric discharge in preceding step can be configured according to actual needs, this was tested
Temperature environment in journey in preferred current procedures includes -20 DEG C, -15 DEG C, -10 DEG C, -5 DEG C, 0 DEG C, 5 DEG C, 10 DEG C, 15 DEG C, 20
DEG C, 30 DEG C, 40 DEG C and 50 DEG C, the preferred velocity of discharge is 1/3C, and the voltage after preferred electric discharge is 2V；
3, these power battery packs being discharged to after certain voltage are respectively placed in above-mentioned different temperature environment, with
Stop when certain charging rate constant-current charge to certain voltage, measures the charge capacity of each power battery pack at this time respectively；
In a particular application, the charging rate in current procedures and the voltage after charging can be configured according to actual needs, this
Charging rate in experimentation in preferred current procedures is 1/3C, and the voltage after preferred charging is 3.75V.
In a particular application, different multiplying of the power battery pack under different temperatures environment can be measured previously according to experiment
Discharge curve and different multiplying charge graph, specific experiment process are as follows：
1, several consistency height, the production of same batch and the identical power battery pack of model are chosen, by these power batteries
Group it is fully charged to state-of-charge be 100%, then by these power battery packs stand a period of time；In a particular application, currently
The number and time of repose of power battery pack in step can be selected according to actual needs, in this experimentation preferably when
The number of power battery pack in preceding step is 10, and time of repose is 4 hours；
2, these power battery packs after standing are respectively placed in different temperature environments, respectively with different multiplying powers
Stop when constant-current discharge to certain voltage, measures respectively when each power battery pack is discharged to certain voltage under different multiplying
Discharge electricity amount；In a particular application, the voltage after the temperature environment in current procedures, multiplying power and electric discharge can be according to practical need
Be configured, the temperature environment in this experimentation in preferred current procedures include 23 DEG C, 55 DEG C, 15 DEG C, 10 DEG C, 5 DEG C, 0
DEG C, -5 DEG C, -10 DEG C, -15 DEG C and -20 DEG C, preferred multiplying power includes 0.5C, 1C, 2C, 3C, 4C and 4.8C, preferably discharges it
Voltage afterwards is 2V；
3, these power battery packs being discharged to after certain voltage are respectively placed in above-mentioned different temperature environment, with
Stop when certain multiplying power constant-current charge to certain voltage, measures each power battery pack respectively and charged under different multiplying centainly
Charge capacity when voltage；In a particular application, the multiplying power in current procedures and the voltage after electric discharge can be according to reality
It needs to be configured, the multiplying power in this experimentation in preferred current procedures includes 0.2C, 0.5C, 1C and 2C, preferred charging
Voltage later is 3.8V.
As shown in figure 3, being previously according to the different multiplying discharge curve for testing the power battery pack measured at 25 DEG C
With different multiplying charge graph of the power battery pack at 23 DEG C.
Step S30：According to the current flow, the current highest monomer voltage, the current minimum monomer voltage, pre-
If OCV-SOC curves and predetermined DC internal resistance table, state-of-charge is estimated by what open circuit voltage method calculated the power battery pack.
OCV-SOC curves in the present invention refer to open-circuit voltage (Open Circuit Voltage, OCV)-charged shape
State (State of Charge, SOC) curve.
In a particular application, the default OCV-SOC curves of power battery pack, specific experiment can be measured previously according to experiment
Process is as follows：
1, several consistency height, the production of same batch and the identical power battery pack of model are chosen, by these power batteries
Group is stopped when being discharged to certain voltage with certain discharge current, is set the state-of-charge of each power battery pack at this time as 0, then will
These power battery packs stand a period of time；In a particular application, the number of power battery pack, discharge current and time of repose can
To be selected according to actual needs, in this experimentation the number of preferred power battery pack be 2, discharge current 2A, it is quiet
It is 2 hours to set the time；
2, by these power battery packs after standing with certain charging rate constant-current charge certain time, make these electricity
The voltage of pond group is less than upper limit voltage, these power battery packs are then stood a period of time, it is certain to repeat current procedures
Number；In a particular application, the charging rate in current procedures, charging time, upper limit voltage, time of repose and repeating are worked as
The number of preceding step can be configured according to actual needs, and preferred charging rate is 0.2C, charging time in this experimentation
For 3 minutes, upper limit voltage 3.8V, time of repose be 2 hours, to repeat the number of current procedures be 100 times；
3, by these power battery packs respectively to stop when certain charging rate constant-current charge to certain upper limit voltage and limit
Determine the cut-off current of charging process, these power battery packs are then stood into a period of time；In a particular application, in current procedures
Charging rate, upper limit voltage and cut-off current can be configured according to actual needs, preferably current step in this experimentation
Charging rate in rapid is 0.2C, upper limit voltage is 3.8V and cut-off current is 0.75A；
4, at interval of the electricity of the primary each power battery pack of certain time acquisition during executing above-mentioned steps 1~3
Pressure and power；In a particular application, the interval time of collection voltages and power can carry out according to actual needs in current procedures
It is arranged, the interval time in this experimentation in preferred current procedures is 10 seconds；
5, it completes to carry out peak power test to these power battery packs after above-mentioned steps 4.
As shown in figure 4, to measure the default OCV-SOC curve graphs of power battery pack previously according to experiment.
It in a particular application, can be previously according to dynamic open voltage equation, default OCV-SOC curves and by direct current
The predetermined DC internal resistance table of power battery pack is made in the DC internal resistance that resistance method is calculated.
As shown in figure 5, for the equivalent-circuit model under power battery pack working condition, R in Fig. 50For ohmic internal resistance, R1For
Polarization resistance, C1For polarization capacity, R2For diffusion resistance, C2For diffusion capacitance.It is set since power battery is applied to electric vehicle etc.
When standby upper, the electric current of charge and discharge process is larger, therefore, can be directly total using the DC internal resistance of power battery pack as its direct current
Internal resistance.Terminal voltage, current of the model foundation about the current flow of power battery pack, current monolithic battery according to figure 5
Relational expression between the real-time open-circuit voltage and DC internal resistance of single battery, i.e. dynamic open voltage equation：UOCV=V+I*
ZDCIR；Wherein, UOCVFor the real-time open-circuit voltage of current monolithic battery, V is the terminal voltage of current monolithic battery, and I is current electricity
Stream, ZDCIRFor DC internal resistance.
As shown in fig. 6, for previously according to electric current and terminal voltage of the power battery pack that measures of experiment in charge and discharge process at any time
Between the relational graph that changes.By Fig. 6 it is known that the total internal resistance of direct current in power battery pack discharge process
The total internal resistance of direct current in charging process
Step S40：If the ampere-hour state-of-charge and the difference for estimating state-of-charge are unsatisfactory for default correction conditions,
Then using the ampere-hour state-of-charge as the practical state-of-charge of the power battery pack；Otherwise according to default correction factor to institute
It states ampere-hour state-of-charge to be modified, stop when the revised ampere-hour state-of-charge estimates state-of-charge more than described in,
And using the revised ampere-hour state-of-charge as the practical state-of-charge of the power battery pack.
In a particular application, default correction conditions may include：
1, ampere-hour state-of-charge SOCAHWith estimate state-of-charge SOCyuguDifference absolute value | SOCAH-SOCyugu|≥F1
(SOCyugu)；
2, ampere-hour state-of-charge SOCAHWith estimate state-of-charge SOCyuguDifference absolute value | SOCAH-SOCyugu|≥F2
(SOCyugu)；
3, ampere-hour state-of-charge SOCAHWith estimate state-of-charge SOCyuguDifference absolute value | SOCAH-SOCyugu|≥F3
(SOCyugu)；
Wherein, F1(SOCyugu)、F2(SOCyugu) and F3(SOCyugu) be and estimate state-of-charge SOCyuguRelevant numerical value
Or function.
In a particular application, it is corresponding with default correction conditions to preset correction factor.
The present embodiment calculates separately to obtain the charged shape of ampere-hour of power battery pack by current integration method and open circuit voltage method
State and state-of-charge is estimated, then by judging whether ampere-hour state-of-charge meets default amendment with the difference for estimating state-of-charge
Condition is modified ampere-hour state-of-charge, if not correcting, then it is assumed that ampere-hour state-of-charge is accurate and directly by ampere-hour
Practical state-of-charge of the state-of-charge as power battery pack, if correcting, using revised ampere-hour state-of-charge as power
The practical state-of-charge of battery pack can correct generated error in state-of-charge calculating process, effectively improve charged in time
The computational accuracy and calculation amount of state are small, are easily achieved.
One embodiment of the present of invention provides and is further improved power on a kind of basis of the embodiment corresponding to Fig. 1
The state-of-charge computational methods of battery pack, as shown in fig. 7, embodiment corresponding to method and Fig. 1 that the present embodiment is provided
The difference is that step S30 in Fig. 1 is specifically included：
Step S31：Inquire the corresponding DC internal resistance of current flow described in predetermined DC internal resistance table；
Step S32：According to the current flow, the current highest monomer voltage, the current minimum monomer voltage and
The DC internal resistance calculates the corresponding current highest open-circuit voltage of the current highest monomer voltage and institute by open circuit voltage method
State the corresponding current minimum open-circuit voltage of current minimum monomer voltage.
In a particular application, by current flow I, current highest monomer voltage Umax, current minimum monomer voltage UminWith it is straight
Stream internal resistance R1 substitutes into dynamic open voltage equation respectively：UOCV=V+I*ZDCIR, current highest open-circuit voltage U is calculatedOCV-max
=Umax+ I*R1 and current minimum open-circuit voltage UOCV-min=Umin+I*R1。
Step S33：Inquire the corresponding current maximum lotus of current highest open-circuit voltage described in the default OCV-SOC curves
Electricity condition and the corresponding current minimum state-of-charge of the currently minimum monomer voltage.
In a particular application, the current maximum state-of-charge SOC inquired by presetting OCV-SOC curvesmaxWith it is current
Minimum state-of-charge SOCmin。
Step S34：Average computation is weighted to the current maximum state-of-charge and the current minimum state-of-charge,
Obtain the state-of-charge that is currently averaged.
In a particular application, according to formula S OCavg=mSOCmax+nSOCmin, averagely state-of-charge is calculated currently
SOCavg, wherein m+n=1 and m, n are all higher than or equal to 0 and are less than or equal to 1.
In a particular application, the concrete numerical value of m and n can be configured according to actual needs, i.e., to current maximum charged
The weight that state and current minimum state-of-charge are weighted average computation can be configured according to actual needs.
Step S35：If the power battery pack is in discharge condition and the current minimum state-of-charge is greater than or equal to
First state-of-charge threshold value, then using the current maximum state-of-charge estimated as described in state-of-charge first object value and with
The state-of-charge of estimating is modified to the first object value by the first default step-length.
In a particular application, the first state-of-charge threshold value can be configured according to actual needs, first in the present embodiment
State-of-charge threshold value is preferably 80%.
Step S36：If it is charged more than second that the power battery pack is in discharge condition, the current minimum state-of-charge
State threshold and be less than the first state-of-charge threshold value, then using it is described currently averagely state-of-charge state-of-charge is estimated as described in
The state-of-charge of estimating simultaneously is modified to second desired value by the second desired value with the second default step-length.
In a particular application, the second state-of-charge threshold value can be configured according to actual needs, second in the present embodiment
State-of-charge threshold value is preferably 40%.
Step S37：If the power battery pack is in discharge condition and the current minimum state-of-charge is less than the second lotus
Electricity condition threshold value, then using the current minimum state-of-charge estimated as described in the third desired value of state-of-charge and with third it is pre-
If the state-of-charge of estimating is modified to the third desired value by step-length.
Step S38：If the power battery pack is in charged state and the current maximum state-of-charge is greater than or equal to
Third state-of-charge threshold value, then using the current averagely state-of-charge estimated as described in state-of-charge the 4th desired value and with
The state-of-charge of estimating is modified to the 4th desired value by the 4th default step-length.
In a particular application, third state-of-charge threshold value can be configured according to actual needs, third in the present embodiment
State-of-charge threshold value is preferably 70%.
Step S39：If the power battery pack is in charged state and the current maximum state-of-charge is less than third lotus
Electricity condition threshold value, then using the current maximum state-of-charge estimated described in asing the 5th desired value of state-of-charge and with the 5th in advance
If the state-of-charge of estimating is modified to the 5th desired value by step-length.
The first step in the present embodiment grows to the 5th step-length and can be configured according to actual needs.
The present embodiment passes through current charging and discharging state, current highest monomer voltage and the current minimum list to power battery pack
Bulk voltage carries out comprehensive assessment, calculates the desired value of estimating state-of-charge of the power battery pack under different conditions, and according to meter
Obtained desired value is modified to currently estimating state-of-charge, and the current of power battery pack is made to estimate state-of-charge to target
It is worth transition, can effectively improve the precision for estimating state-of-charge being calculated by open circuit voltage method.
One embodiment of the present of invention provides and is further improved power on a kind of basis of the embodiment corresponding to Fig. 1
The state-of-charge computational methods of battery pack, as shown in figure 8, embodiment corresponding to method and Fig. 1 that the present embodiment is provided
The difference is that the step S40 in Fig. 1 is specifically included：
Step S41：Judge whether the ampere-hour state-of-charge and the absolute value of the difference for estimating state-of-charge are more than
First preset difference value, the second preset difference value or third preset difference value.
In a particular application, the first preset difference value, the second preset difference value and third preset difference value can be according to actual needs
It is configured, can be specifically that can be expressed as the first preset difference value about the numerical value or function for estimating state-of-charge
F1(SOCyugu), the second preset difference value F2(SOCyugu) and third preset difference value F3(SOCyugu)。
Step S42：If the absolute value is less than or equal to the first preset difference value, is less than or equal to the second preset difference value and small
In or be equal to third preset difference value, then using the ampere-hour state-of-charge as the practical state-of-charge of the power battery pack.
Step S43：If the absolute value is more than the first preset difference value, charged to the ampere-hour according to the first predetermined coefficient
State is modified.
Step S44：If the absolute value is more than the second preset difference value, charged to the ampere-hour according to the second predetermined coefficient
State is modified.
Step S45：If the absolute value is more than third preset difference value, charged to the ampere-hour according to third predetermined coefficient
State is modified.
In a particular application, the first predetermined coefficient, the second predetermined coefficient and third predetermined coefficient can be according to current
Ampere-hour state-of-charge is determined with state-of-charge is estimated, and can also consider the current state of charge of power battery pack according to reality
It is set, can specifically be expressed as KS1、KS2And KS3。
Step S46：Judge the revised ampere-hour state-of-charge estimates state-of-charge described in whether being more than.
Step S47：If the revised ampere-hour state-of-charge estimates state-of-charge described in being more than, by revised institute
State practical state-of-charge of the ampere-hour state-of-charge as the power battery pack.
Step S48：If the revised ampere-hour state-of-charge estimates state-of-charge described in being less than or equal to, return
Return step S41.
The present embodiment is by comparing ampere-hour state-of-charge and estimates state-of-charge size and ampere-hour state-of-charge and is estimating
When the difference of state-of-charge meets default correction conditions, according to correction factor corresponding with default correction conditions to the charged shape of ampere-hour
State is modified, and to obtain actual state-of-charge, can effectively improve only by current integration method or only by electricity of opening a way
The precision of the state-of-charge of power battery pack is calculated in platen press, realizes the complementation of current integration method and open circuit voltage method.
One embodiment of the present of invention provides further improved dynamic on a kind of basis of the embodiment corresponding to Fig. 1
The state-of-charge computational methods of power battery pack, as shown in figure 9, the embodiment corresponding to method and Fig. 1 that the present embodiment is provided
The difference is that the step S20 in Fig. 1 further includes before：
Step S50：It is bent according to the current minimum monomer voltage, the initial nominal capacity and the default OCV-SOC
Line corrects the initial state-of-charge.
In one embodiment of the invention, step S50 is specifically included：
Step S51：If the power battery pack be it is fully charged after power on use for the first time, the initial state-of-charge is repaiied
Just it is being 100%；
Step S52：If the moment that currently powers on of the power battery pack is greater than or equal to last time lower electric time at intervals
The first preset time and current minimum monomer voltage is less than or equal to the first default monomer voltage, then will be described initially charged
State revision is the corresponding state-of-charge of current minimum monomer voltage described in the default OCV-SOC curves.
In a particular application, the first preset time and the first default monomer voltage can be configured according to actual needs,
Preferably the first preset time is 2 hours in the present embodiment.
Step S53：If the moment that currently powers on of the power battery pack is greater than or equal to last time lower electric time at intervals
First preset time, the current minimum monomer voltage are more than the lotus at the first default monomer voltage and the last lower electric moment
The initial state-of-charge within the scope of default state-of-charge, is not then modified in the default OCV-SOC curves by electricity condition
The corresponding state-of-charge of the current minimum monomer voltage.
In a particular application, presetting state-of-charge range can be configured according to actual needs, in the present embodiment preferably
Default state-of-charge ranging from 30%~80%.
Step S54：If the moment that currently powers on of the power battery pack is greater than or equal to last time lower electric time at intervals
First preset time, the current minimum monomer voltage are more than the lotus at the first default monomer voltage and the last lower electric moment
Electricity condition then judges last to correct the initial state-of-charge and move described in the current time within the scope of default state-of-charge
Whether the total discharge electricity amount of history of power battery pack is more than the initial nominal capacity, is to be modified to the initial state-of-charge
The corresponding state-of-charge of current minimum monomer voltage described in the default OCV-SOC curves, otherwise will the initially charged shape
State is modified to the state-of-charge at the last lower electric moment.
Step S55：If the power battery pack currently powers on moment and last lower electric time at intervals in advance more than second
If the time and being less than the first preset time, then judge last to correct initial state-of-charge power described in the current time
Whether the total discharge electricity amount of history of battery pack is more than the initial nominal capacity, is that the initial state-of-charge is modified to institute
The corresponding state-of-charge of current minimum monomer voltage is stated described in default OCV-SOC curves, otherwise by the initial state-of-charge
It is modified to the state-of-charge at the last lower electric moment.
In a particular application, the second preset time can be configured according to actual needs, preferably second in the present embodiment
Preset time is 10 minutes.
Step S56：If the moment that currently powers on of the power battery pack is less than or equal to last time lower electric time at intervals
The initial state-of-charge is then modified to the state-of-charge at the last lower electric moment by the second preset time.
Initial charged shape when powering on usage time and its last time shutdown that the present embodiment passes through combination power battery pack
State, initial state-of-charge when this powers on use to power battery pack are modified, it is ensured that power battery pack it is initial
The accuracy of state-of-charge, so as to effectively improve the essence for the ampere-hour state-of-charge being calculated subsequently through current integration method
Exactness.
One embodiment of the present of invention provides further improved dynamic on a kind of basis of the embodiment corresponding to Fig. 1
The state-of-charge computational methods of power battery pack, as shown in Figure 10, the embodiment corresponding to method and Fig. 1 that the present embodiment is provided
The difference is that step S40 in Fig. 1 includes later：
Step S60：According to the current highest monomer voltage, the current minimum monomer voltage, the initial charged shape
State and the practical state-of-charge, correct the initial nominal capacity
In one embodiment of the invention, step S60 is specifically included：
Step S61：When detecting that the power battery pack is discharged to default state-of-charge or less by full power state, institute is recorded
The discharge capacity and residual capacity of power battery pack are stated, and the sum of the discharge capacity and described residual capacity are recorded as
The actual capacity of the power battery pack.
In a particular application, default state-of-charge can be configured according to actual needs, preferably default in the present embodiment
State-of-charge is 10%.
Step S62：If by current time, continuous preset times detect that the power battery pack is put by full power state
Electricity is to default state-of-charge hereinafter, then judging whether the initial nominal capacity is greater than or equal to the continuous preset times record
The actual capacity in maximum value.
In a particular application, preset times can be configured according to actual needs, preferred preset times in the present embodiment
It is 2 times.
Step S63：It, will be described first if the initial nominal capacity is greater than or equal to the maximum value in the actual capacity
Beginning nominal capacity is modified to initial nominal capacity the-the first preset capacity correction factor *, and (the initial nominal capacity-is described
Maximum value in actual capacity).
In a particular application, the first preset capacity correction factor can be configured according to actual needs, in the present embodiment
It is preferred that the first preset capacity correction factor is 1/2.
Step S64：If the initial nominal capacity is less than the maximum value in the actual capacity, by the initial nominal
Cubage correction is that (maximum value-in the actual capacity is described by initial nominal capacity the+the second preset capacity correction factor *
Initial nominal capacity).
In a particular application, the second preset capacity correction factor can be configured according to actual needs, in the present embodiment
It is preferred that the second preset capacity correction factor is 1/5.
Step S65：In the power battery discharge process, if cut-off current time is in continuous preset time period
Detect that the minimum monomer voltage of the power battery pack is less than or equal to default minimum voltage threshold value and the reality is charged
State, which is greater than or equal to, presets minimum state-of-charge, then the practical state-of-charge is modified to the default minimum charged shape
The initial nominal cubage correction is simultaneously by state
In a particular application, continuous preset time period, default minimum voltage threshold value, default minimum state-of-charge and third are pre-
If cubage correction coefficient can be configured according to actual needs, preferably continuous preset time period is 8 seconds, presets in the present embodiment
Minimum state-of-charge is 5%.
Step S66：During the power battery charging, if detecting the practical state-of-charge of the power battery pack
More than or equal to default highest state-of-charge and maximum monomer voltage is less than default ceiling voltage threshold value, then records the moment first
The total charge volume of history and the practical state-of-charge for stopping calculating the power battery pack, if the current highest described in the current time
Monomer voltage is greater than or equal to default ceiling voltage threshold value, then record the total charge volume of the second history at current time and will it is described at the beginning of
Beginning nominal capacity is modified to the+the four preset capacity correction factor of initial nominal capacity * (total charge volumes-of the second history
The total charge volume of first history).
In a particular application, ceiling voltage threshold value, default highest state-of-charge and the 4th preset capacity correction factor are preset
It can be configured according to actual needs, preferably default ceiling voltage threshold value is 3.8V, presets the charged shape of highest in the present embodiment
State is 99%.
The present embodiment is by combining the current charging and discharging state of power battery pack, current highest monomer voltage, current minimum
Monomer voltage, initial state-of-charge and practical state-of-charge are modified the initial nominal capacity of power battery pack, Ke Yibao
The accuracy for demonstrate,proving the initial nominal capacity of power battery pack, is calculated so as to effectively improve subsequently through current integration method
Ampere-hour state-of-charge accuracy.
As shown in figure 11, one embodiment of the present of invention provides a kind of state-of-charge computing system 100 of power battery pack,
For executing the method and step in the embodiment corresponding to Fig. 1 comprising：
Parameter acquiring unit 10, for obtaining the current flow of the power battery pack, current highest monomer voltage, current
Minimum monomer voltage, initial state-of-charge and initial nominal capacity；
Ampere-hour state-of-charge computing unit 20, for according to the current flow, the initial state-of-charge and it is described just
Beginning nominal capacity calculates the ampere-hour state-of-charge of the power battery pack by current integration method；
State-of-charge computing unit 30 is estimated, for according to the current flow, the current highest monomer voltage, described
Current minimum monomer voltage, default OCV-SOC curves and predetermined DC internal resistance table, the power electric is calculated by open circuit voltage method
Pond group estimates state-of-charge；
Practical state-of-charge determination unit 40, if for the ampere-hour state-of-charge and the difference for estimating state-of-charge
Default correction conditions are unsatisfactory for, then using the ampere-hour state-of-charge as the practical state-of-charge of the power battery pack；Otherwise
The ampere-hour state-of-charge is modified according to default correction factor, until the revised ampere-hour state-of-charge is more than institute
It states and stops when estimating state-of-charge, and using the revised ampere-hour state-of-charge as the charged shape of the reality of the power battery pack
State.
The present embodiment calculates separately to obtain the charged shape of ampere-hour of power battery pack by current integration method and open circuit voltage method
State and state-of-charge is estimated, then by judging whether ampere-hour state-of-charge meets default amendment with the difference for estimating state-of-charge
Condition is modified ampere-hour state-of-charge, if not correcting, then it is assumed that ampere-hour state-of-charge is accurate and directly by ampere-hour
Practical state-of-charge of the state-of-charge as power battery pack, if correcting, using revised ampere-hour state-of-charge as power
The practical state-of-charge of battery pack can correct generated error in state-of-charge calculating process, effectively improve charged in time
The computational accuracy and calculation amount of state are small, are easily achieved.
As shown in figure 12, the state-of-charge computing unit 30 of estimating in one embodiment of the invention in Figure 11 includes using
In execute Fig. 7 corresponding to embodiment in method and step with lower structure：
DC internal resistance query unit 31, for inquiring in the corresponding direct current of current flow described in predetermined DC internal resistance table
Resistance；
Open-circuit voltage calculates unit 32, for according to the current flow, the current highest monomer voltage, described current
Minimum monomer voltage and the DC internal resistance, by open circuit voltage method calculate the current highest monomer voltage it is corresponding it is current most
High open circuit voltage and the corresponding current minimum open-circuit voltage of the current minimum monomer voltage；
State-of-charge query unit 33, for inquiring current highest open-circuit voltage described in the default OCV-SOC curves
Corresponding current maximum state-of-charge and the corresponding current minimum state-of-charge of the currently minimum monomer voltage；
Weighted average calculation unit 34, for the current maximum state-of-charge and the current minimum state-of-charge into
Row weighted average calculation obtains the state-of-charge that is currently averaged；
First estimates state-of-charge amending unit 35, if being in discharge condition and described current for the power battery pack
Minimum state-of-charge is greater than or equal to the first state-of-charge threshold value, then the current maximum state-of-charge is estimated lotus as described in
The state-of-charge of estimating simultaneously is modified to the first object value by the first object value of electricity condition with the first default step-length；
Second estimates state-of-charge amending unit 36, if being in discharge condition, described current for the power battery pack
Minimum state-of-charge is more than the second state-of-charge threshold value and is less than the first state-of-charge threshold value, then by the currently average charged shape
State estimates the second desired value of state-of-charge as described in and the state-of-charge of estimating is modified to institute with the second default step-length
State the second desired value；
Third estimates state-of-charge amending unit 37, if being in discharge condition and described current for the power battery pack
Minimum state-of-charge is less than the second state-of-charge threshold value, then the current minimum state-of-charge is estimated state-of-charge as described in
Third desired value and the state-of-charge of estimating is modified to by the third desired value with third default step-length；
4th estimates state-of-charge amending unit 38, if being in charged state and described current for the power battery pack
Maximum state-of-charge is greater than or equal to third state-of-charge threshold value, then the currently averagely state-of-charge is estimated lotus as described in
The state-of-charge of estimating simultaneously is modified to the 4th desired value by the 4th desired value of electricity condition with the 4th default step-length；
5th estimates state-of-charge amending unit 39, if being in charged state and described current for the power battery pack
Maximum state-of-charge is less than third state-of-charge threshold value, then the current maximum state-of-charge is estimated state-of-charge as described in
The 5th desired value and the state-of-charge of estimating is modified to by the 5th desired value with the 5th default step-length.
The present embodiment passes through current charging and discharging state, current highest monomer voltage and the current minimum list to power battery pack
Bulk voltage carries out comprehensive assessment, calculates the desired value of estimating state-of-charge of the power battery pack under different conditions, and according to meter
Obtained desired value is modified to currently estimating state-of-charge, and the current of power battery pack is made to estimate state-of-charge to target
It is worth transition, can effectively improve the precision for estimating state-of-charge being calculated by open circuit voltage method.
As shown in figure 13, in one embodiment of the invention, the practical state-of-charge determination unit 40 in Figure 11 includes
For execute the method and step in the embodiment corresponding to Fig. 8 with lower structure：
Dif ference judgment unit 41, for judging the absolute of the ampere-hour state-of-charge and the difference for estimating state-of-charge
Whether value is more than the first preset difference value, the second preset difference value or third preset difference value；
First state-of-charge determination unit 42, if for the absolute value be less than or equal to the first preset difference value, be less than or
Equal to the second preset difference value and it is less than or equal to third preset difference value, then using the ampere-hour state-of-charge as the power battery
The practical state-of-charge of group；
First ampere-hour state-of-charge amending unit 43, if being more than the first preset difference value for the absolute value, according to the
One predetermined coefficient is modified the ampere-hour state-of-charge；
Second ampere-hour state-of-charge amending unit 44, if being more than the second preset difference value for the absolute value, according to the
Two predetermined coefficients are modified the ampere-hour state-of-charge；
Third ampere-hour state-of-charge amending unit 45, if being more than third preset difference value for the absolute value, according to the
Three predetermined coefficients are modified the ampere-hour state-of-charge；
State-of-charge judging unit, for judge the revised ampere-hour state-of-charge whether be more than it is described estimate it is charged
State；
Second state-of-charge determination unit 46, if for the revised ampere-hour state-of-charge be more than it is described estimate it is charged
State is then using the revised ampere-hour state-of-charge as the practical state-of-charge of the power battery pack；
Returning unit 47, if estimating charged shape less than or equal to described for the revised ampere-hour state-of-charge
State then returns to the dif ference judgment unit.
The present embodiment is by comparing ampere-hour state-of-charge and estimates state-of-charge size and ampere-hour state-of-charge and is estimating
When the difference of state-of-charge meets default correction conditions, according to correction factor corresponding with default correction conditions to the charged shape of ampere-hour
State is modified, and to obtain actual state-of-charge, can effectively improve only by current integration method or only by electricity of opening a way
The precision of the state-of-charge of power battery pack is calculated in platen press, realizes the complementation of current integration method and open circuit voltage method.
As shown in figure 14, in one embodiment of the invention, the state-of-charge of power battery pack shown in Figure 11 calculates
System 100 further include for execute method and step shown in Fig. 9 with lower structure：
Initial state-of-charge amending unit 50, for according to current minimum monomer voltage, the initial nominal capacity
With the default OCV-SOC curves, the initial state-of-charge is corrected.
In a real-time example, initial state-of-charge amending unit 50 includes：
First initial state-of-charge amending unit, if for the power battery pack be it is fully charged after power on use for the first time,
The initial state-of-charge is then modified to 100%；
Second initial state-of-charge amending unit, if being powered under moment and last time for the current of the power battery pack
Electric time at intervals is greater than or equal to the first preset time and the current minimum monomer voltage is less than or equal to the first default monomer
The initial state-of-charge is then modified to current minimum monomer voltage described in the default OCV-SOC curves and corresponded to by voltage
State-of-charge；
The initial state-of-charge amending unit of third, if being powered under moment and last time for the current of the power battery pack
Electric time at intervals is greater than or equal to the first preset time, the current minimum monomer voltage is more than the first default monomer voltage and institute
The state-of-charge at electric moment under the last time is stated not within the scope of default state-of-charge, then the initial state-of-charge is modified to institute
State described in default OCV-SOC curves the corresponding state-of-charge of current minimum monomer voltage；
4th initial state-of-charge amending unit, if being powered under moment and last time for the current of the power battery pack
Electric time at intervals is greater than or equal to the first preset time, the current minimum monomer voltage is more than the first default monomer voltage and institute
The state-of-charge at electric moment under the last time is stated within the scope of default state-of-charge, then judges the last amendment initial charged shape
Whether the total discharge electricity amount of history of state power battery pack described in the current time is more than the initial nominal capacity, is then by institute
It states initial state-of-charge and is modified to described in the default OCV-SOC curves the corresponding state-of-charge of current minimum monomer voltage,
Otherwise the initial state-of-charge is modified to the state-of-charge at the last lower electric moment；
5th initial state-of-charge amending unit, if being powered under moment and last time for the current of the power battery pack
Electric time at intervals is more than the second preset time and is less than the first preset time, then judges the last amendment initial state-of-charge
Whether the total discharge electricity amount of history of the power battery pack described in the current time is more than the initial nominal capacity, and being then will be described
Initial state-of-charge is modified to the corresponding state-of-charge of current minimum monomer voltage described in the default OCV-SOC curves, no
The initial state-of-charge is then modified to the state-of-charge at the last lower electric moment；
6th initial state-of-charge amending unit, if being powered under moment and last time for the current of the power battery pack
Electric time at intervals is less than or equal to the second preset time, then the initial state-of-charge is modified to the last lower electric moment
State-of-charge.
Initial charged shape when powering on usage time and its last time shutdown that the present embodiment passes through combination power battery pack
State, initial state-of-charge when this powers on use to power battery pack are modified, it is ensured that power battery pack it is initial
The accuracy of state-of-charge, so as to effectively improve the essence for the ampere-hour state-of-charge being calculated subsequently through current integration method
Exactness.
As shown in figure 15, in one embodiment of the invention, the state-of-charge of power battery pack shown in Figure 11 calculates
System 100 further include for execute method and step shown in Fig. 10 with lower structure：
Initial nominal cubage correction unit 60, for according to the current highest monomer voltage, the current minimum monomer
Voltage, the initial state-of-charge and the practical state-of-charge, correct the initial nominal capacity.
Initial nominal cubage correction unit 60 includes in one embodiment of the invention：
Actual capacity computing unit, for detecting that the power battery pack is discharged to default state-of-charge by full power state
When following, the discharge capacity and residual capacity of the power battery pack, and discharge capacity and the residue by described in are recorded
The sum of capacity is recorded as the actual capacity of the power battery pack；
Maximum capacity judging unit, if for continuous preset times to detect the power battery by current time
Group is discharged to default state-of-charge hereinafter, then judging whether the initial nominal capacity is greater than or equal to the company by full power state
Maximum value in the actual capacity of continuous preset times record；
First cubage correction unit, if being greater than or equal to the maximum in the actual capacity for the initial nominal capacity
The initial nominal cubage correction is then initial nominal capacity the-the first preset capacity correction factor * (described initial by value
Maximum value in the nominal capacity-actual capacity)；
Second cubage correction unit, if being less than the maximum value in the actual capacity for the initial nominal capacity,
It is initial nominal capacity the+the second preset capacity correction factor * (in the actual capacity by the initial nominal cubage correction
The maximum value-initial nominal capacity)；
Third cubage correction unit is used in the power battery discharge process, if cut-off current time is continuous
Detect that the minimum monomer voltage of the power battery pack is less than or equal to default minimum voltage threshold value and institute in preset time period
It states practical state-of-charge and is greater than or equal to default minimum state-of-charge, then the practical state-of-charge is modified to described preset most
The initial nominal cubage correction is simultaneously by low state-of-charge
4th cubage correction unit is used for during the power battery charging, if detecting the power battery pack
Practical state-of-charge be greater than or equal to default highest state-of-charge and maximum monomer voltage is less than default ceiling voltage threshold value, then
It records the total charge volume of the first history of moment and stops calculating the practical state-of-charge of the power battery pack, if when current
It carves the current highest monomer voltage and is greater than or equal to default ceiling voltage threshold value, then the second history for recording current time is always filled
Electricity and by the initial nominal cubage correction be the+the four preset capacity correction factor of initial nominal capacity * (described second
The total charge volume-of the history total charge volume of the first history).
The present embodiment is by combining the current charging and discharging state of power battery pack, current highest monomer voltage, current minimum
Monomer voltage, initial state-of-charge and practical state-of-charge are modified the initial nominal capacity of power battery pack, Ke Yibao
The accuracy for demonstrate,proving the initial nominal capacity of power battery pack, is calculated so as to effectively improve subsequently through current integration method
Ampere-hour state-of-charge accuracy.
The power battery pack being previously mentioned in all embodiments of the invention can be specifically by least two monomer LiFePO4s
The lithium iron phosphate dynamic battery group that battery is composed in series.
In one embodiment of the invention, the state-of-charge computational methods of above-mentioned power battery pack and system specifically can be with
Applied to the battery management system (BATTERY MANAGEMENT SYSTEM, BMS) being managed to power battery pack.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of state-of-charge computational methods of power battery pack, which is characterized in that the state-of-charge computational methods include：
Obtain current flow, current highest monomer voltage, current minimum monomer voltage, the initial charged shape of the power battery pack
State and initial nominal capacity；
According to the current flow, the initial state-of-charge and the initial nominal capacity, institute is calculated by current integration method
State the ampere-hour state-of-charge of power battery pack；
It is bent according to the current flow, the current highest monomer voltage, the current minimum monomer voltage, default OCV-SOC
Line and predetermined DC internal resistance table estimate state-of-charge by what open circuit voltage method calculated the power battery pack；
If the ampere-hour state-of-charge and the difference for estimating state-of-charge are unsatisfactory for default correction conditions, by the ampere-hour
Practical state-of-charge of the state-of-charge as the power battery pack；Otherwise according to default correction factor to the charged shape of the ampere-hour
State is modified, and is stopped when the revised ampere-hour state-of-charge estimates state-of-charge more than described in, and will be revised
Practical state-of-charge of the ampere-hour state-of-charge as the power battery pack.
2. the state-of-charge computational methods of power battery pack as described in claim 1, which is characterized in that work as described in the basis
Preceding electric current, the current minimum monomer voltage, is preset in OCV-SOC curves and predetermined DC the current highest monomer voltage
Table is hindered, the state-of-charge of estimating of the power battery pack is calculated by open circuit voltage method, including：
Inquire the corresponding DC internal resistance of current flow described in predetermined DC internal resistance table；
According to the current flow, the current highest monomer voltage, the current minimum monomer voltage and the DC internal resistance,
The corresponding current highest open-circuit voltage of the current highest monomer voltage and the current minimum list are calculated by open circuit voltage method
The corresponding current minimum open-circuit voltage of bulk voltage；
Inquire the corresponding current maximum state-of-charge of current highest open-circuit voltage described in the default OCV-SOC curves and described
The currently corresponding current minimum state-of-charge of minimum monomer voltage；
Average computation is weighted to the current maximum state-of-charge and the current minimum state-of-charge, is obtained currently average
State-of-charge；
If the power battery pack is in discharge condition and the current minimum state-of-charge is greater than or equal to the first state-of-charge
The current maximum state-of-charge is then estimated the first object value of state-of-charge and with the first default step-length by threshold value as described in
The state-of-charge of estimating is modified to the first object value；
If the power battery pack is in discharge condition, the current minimum state-of-charge is more than the second state-of-charge threshold value and small
In the first state-of-charge threshold value, then the currently averagely state-of-charge is estimated into the second desired value of state-of-charge simultaneously as described in
The state-of-charge of estimating is modified to second desired value with the second default step-length；
If the power battery pack is in discharge condition and the current minimum state-of-charge is less than the second state-of-charge threshold value,
Using the current minimum state-of-charge estimated described in asing state-of-charge third desired value and with third default step-length will described in
It estimates state-of-charge and is modified to the third desired value；
If the power battery pack is in charged state and the current maximum state-of-charge is greater than or equal to third state-of-charge
The currently averagely state-of-charge is then estimated the 4th desired value of state-of-charge and with the 4th default step-length by threshold value as described in
The state-of-charge of estimating is modified to the 4th desired value；
If the power battery pack is in charged state and the current maximum state-of-charge is less than third state-of-charge threshold value,
Using the current maximum state-of-charge estimated described in asing state-of-charge the 5th desired value and with the 5th default step-length will described in
It estimates state-of-charge and is modified to the 5th desired value.
3. the state-of-charge computational methods of power battery pack as described in claim 1, which is characterized in that if the ampere-hour
State-of-charge and the difference for estimating state-of-charge are unsatisfactory for default correction conditions, then using the ampere-hour state-of-charge as institute
State the practical state-of-charge of power battery pack；Otherwise the ampere-hour state-of-charge is modified according to default correction factor, directly
To the revised ampere-hour state-of-charge be more than it is described estimate state-of-charge when stop, and by the revised charged shape of ampere-hour
Practical state-of-charge of the state as the power battery pack, including：
Judge the absolute value of the ampere-hour state-of-charge and the difference for estimating state-of-charge whether be more than the first preset difference value,
Second preset difference value or third preset difference value；
If the absolute value is less than or equal to the first preset difference value, is less than or equal to the second preset difference value and is less than or equal to third
Preset difference value, then using the ampere-hour state-of-charge as the practical state-of-charge of the power battery pack；
If the absolute value is more than the first preset difference value, the ampere-hour state-of-charge is repaiied according to the first predetermined coefficient
Just；
If the absolute value is more than the second preset difference value, the ampere-hour state-of-charge is repaiied according to the second predetermined coefficient
Just；
If the absolute value is more than third preset difference value, the ampere-hour state-of-charge is repaiied according to third predetermined coefficient
Just；
Judge the revised ampere-hour state-of-charge estimates state-of-charge described in whether being more than；
If the revised ampere-hour state-of-charge estimates state-of-charge described in being more than, by the revised charged shape of ampere-hour
Practical state-of-charge of the state as the power battery pack；
If the revised ampere-hour state-of-charge estimates state-of-charge described in being less than or equal to, returns and judge the peace
When state-of-charge and the difference for estimating state-of-charge absolute value whether be more than the first preset difference value, the second preset difference value or
The step of third preset difference value.
4. the state-of-charge computational methods of power battery pack as described in claim 1, which is characterized in that work as described in the basis
Preceding electric current, the initial state-of-charge and the initial nominal capacity, the power battery pack is calculated by current integration method
Before ampere-hour state-of-charge, further include：
According to the current minimum monomer voltage, the initial nominal capacity and the default OCV-SOC curves, correct described first
Beginning state-of-charge.
5. the state-of-charge computational methods of power battery pack as described in claim 1, which is characterized in that the state-of-charge meter
Calculation method further includes：
According to the current highest monomer voltage, the current minimum monomer voltage, the initial state-of-charge and the reality
State-of-charge corrects the initial nominal capacity.
6. a kind of state-of-charge computing system of power battery pack, which is characterized in that the state-of-charge computing system includes：
Parameter acquiring unit, current flow, current highest monomer voltage, current minimum list for obtaining the power battery pack
Bulk voltage, initial state-of-charge and initial nominal capacity；
Ampere-hour state-of-charge computing unit, for according to the current flow, the initial state-of-charge and the initial nominal
Capacity calculates the ampere-hour state-of-charge of the power battery pack by current integration method；
Estimate state-of-charge computing unit, for according to the current flow, the current highest monomer voltage, it is described it is current most
Low monomer voltage, default OCV-SOC curves and predetermined DC internal resistance table, the power battery pack is calculated by open circuit voltage method
Estimate state-of-charge；
Practical state-of-charge determination unit, if being unsatisfactory for for the ampere-hour state-of-charge and the difference for estimating state-of-charge
Default correction conditions, then using the ampere-hour state-of-charge as the practical state-of-charge of the power battery pack；Otherwise according to pre-
If correction factor is modified the ampere-hour state-of-charge, until the revised ampere-hour state-of-charge is more than described estimate
Stop when state-of-charge, and using the revised ampere-hour state-of-charge as the practical state-of-charge of the power battery pack.
7. the state-of-charge computing system of power battery pack as claimed in claim 6, which is characterized in that described to estimate charged shape
State computing unit includes：
DC internal resistance query unit, for inquiring the corresponding DC internal resistance of current flow described in predetermined DC internal resistance table；
Open-circuit voltage calculates unit, for according to the current flow, the current highest monomer voltage, the current minimum list
Bulk voltage and the DC internal resistance calculate the corresponding current highest of the current highest monomer voltage by open circuit voltage method and open a way
Voltage and the corresponding current minimum open-circuit voltage of the current minimum monomer voltage；
State-of-charge query unit, it is corresponding for inquiring current highest open-circuit voltage described in the default OCV-SOC curves
Current maximum state-of-charge and the corresponding current minimum state-of-charge of the currently minimum monomer voltage；
Weighted average calculation unit, for being weighted to the current maximum state-of-charge and the current minimum state-of-charge
Average computation obtains the state-of-charge that is currently averaged；
First estimates state-of-charge amending unit, if being in discharge condition and the current minimum lotus for the power battery pack
Electricity condition is greater than or equal to the first state-of-charge threshold value, then the current maximum state-of-charge is estimated state-of-charge as described in
First object value and the state-of-charge of estimating is modified to by the first object value with the first default step-length；
Second estimates state-of-charge amending unit, if being in discharge condition, the current minimum lotus for the power battery pack
Electricity condition be more than the second state-of-charge threshold value and be less than the first state-of-charge threshold value, then will it is described currently be averaged state-of-charge as
The state-of-charge of estimating simultaneously is modified to described second by second desired value for estimating state-of-charge with the second default step-length
Desired value；
Third estimates state-of-charge amending unit, if being in discharge condition and the current minimum lotus for the power battery pack
Electricity condition is less than the second state-of-charge threshold value, then the current minimum state-of-charge is estimated to the third of state-of-charge as described in
The state-of-charge of estimating simultaneously is modified to the third desired value by desired value with third default step-length；
4th estimates state-of-charge amending unit, if being in charged state and the current maximum lotus for the power battery pack
Electricity condition is greater than or equal to third state-of-charge threshold value, then the currently averagely state-of-charge is estimated state-of-charge as described in
The 4th desired value and the state-of-charge of estimating is modified to by the 4th desired value with the 4th default step-length；
5th estimates state-of-charge amending unit, if being in charged state and the current maximum lotus for the power battery pack
Electricity condition is less than third state-of-charge threshold value, then the current maximum state-of-charge is estimated the 5th of state-of-charge as described in
The state-of-charge of estimating simultaneously is modified to the 5th desired value by desired value with the 5th default step-length.
8. the state-of-charge computing system of power battery pack as claimed in claim 6, which is characterized in that the charged shape of reality
State determination unit includes：
Dif ference judgment unit, for judge the ampere-hour state-of-charge and the difference for estimating state-of-charge absolute value whether
More than the first preset difference value, the second preset difference value or third preset difference value；
First state-of-charge determination unit, if being less than or equal to the first preset difference value for the absolute value, being less than or equal to the
Two preset difference values and be less than or equal to third preset difference value, then using the ampere-hour state-of-charge as the reality of the power battery pack
Border state-of-charge；
First ampere-hour state-of-charge amending unit, it is default according to first if being more than the first preset difference value for the absolute value
Coefficient is modified the ampere-hour state-of-charge；
Second ampere-hour state-of-charge amending unit, it is default according to second if being more than the second preset difference value for the absolute value
Coefficient is modified the ampere-hour state-of-charge；
Third ampere-hour state-of-charge amending unit, it is default according to third if being more than third preset difference value for the absolute value
Coefficient is modified the ampere-hour state-of-charge；
State-of-charge judging unit, for judging the revised ampere-hour state-of-charge estimates charged shape described in whether being more than
State；
Second state-of-charge determination unit, if estimating state-of-charge more than described in if the revised ampere-hour state-of-charge
Using the revised ampere-hour state-of-charge as the practical state-of-charge of the power battery pack；
Returning unit, if estimating state-of-charge less than or equal to described for the revised ampere-hour state-of-charge,
Return to the dif ference judgment unit.
9. the state-of-charge computing system of power battery pack as claimed in claim 6, which is characterized in that the state-of-charge meter
Calculation system further includes：
Initial state-of-charge amending unit, for according to the current minimum monomer voltage, the initial nominal capacity and described
Default OCV-SOC curves, correct the initial state-of-charge.
10. the state-of-charge computing system of power battery pack as claimed in claim 6, which is characterized in that the state-of-charge
Computing system further includes：
Initial nominal cubage correction unit, for according to the current highest monomer voltage, current minimum monomer voltage, the institute
Initial state-of-charge and the practical state-of-charge are stated, the initial nominal capacity is corrected.
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061521A (en) * | 2018-10-30 | 2018-12-21 | 四川长虹电源有限责任公司 | Battery group state-of-charge calculation method and system |
| CN109616712A (en) * | 2019-01-21 | 2019-04-12 | 深圳流量链科技有限公司 | A kind of control method, system and the terminal device of battery charging and discharging electric current |
| CN109633457A (en) * | 2019-02-22 | 2019-04-16 | 上海度普新能源科技有限公司 | A kind of acquisition methods and acquisition system of remaining capacity |
| CN109655758A (en) * | 2018-12-29 | 2019-04-19 | 蜂巢能源科技有限公司 | Battery open circuit voltage measurement method and system |
| CN109669138A (en) * | 2018-12-28 | 2019-04-23 | 天能电池集团有限公司 | A kind of method of precise determination power lead storage battery residual capacity |
| CN109991555A (en) * | 2019-04-18 | 2019-07-09 | 深圳市国新动力科技有限公司 | A kind of tender correction method of the battery pack charging SOC and SOC that discharges |
| CN110286324A (en) * | 2019-07-18 | 2019-09-27 | 北京碧水润城水务咨询有限公司 | A kind of battery charge state evaluation method and cell health state evaluation method |
| CN110470993A (en) * | 2019-09-23 | 2019-11-19 | 骆驼集团武汉光谷研发中心有限公司 | A kind of start and stop battery SOC algorithm |
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| CN110850318A (en) * | 2019-11-06 | 2020-02-28 | 上海理工大学 | Lithium battery health state estimation method with filtering method weight distribution |
| CN111880106A (en) * | 2020-08-04 | 2020-11-03 | 安徽江淮汽车集团股份有限公司 | Battery state of charge detection method, equipment, storage medium and device |
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| CN112415410A (en) * | 2019-08-23 | 2021-02-26 | 比亚迪股份有限公司 | Method and apparatus for estimating SOC of battery, storage medium, and vehicle |
| CN112986842A (en) * | 2019-12-17 | 2021-06-18 | 比亚迪股份有限公司 | Method, device and equipment for estimating state of charge of battery |
| CN113466717A (en) * | 2021-06-25 | 2021-10-01 | 深圳移航通信技术有限公司 | Method and apparatus for estimating state of charge of battery |
| CN113820605A (en) * | 2021-09-30 | 2021-12-21 | 蜂巢能源科技(无锡)有限公司 | Battery SOC correction method and device and computer readable storage medium |
| CN114137422A (en) * | 2021-11-23 | 2022-03-04 | 雅迪科技集团有限公司 | Method and device for determining residual electric quantity of electric vehicle |
| CN115079026A (en) * | 2022-06-02 | 2022-09-20 | 国网江苏省电力有限公司电力科学研究院 | SOC automatic calibration method and device suitable for high-voltage energy storage system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303397A (en) * | 2008-06-25 | 2008-11-12 | 河北工业大学 | Method and apparatus for computing lithium ion batteries residual electric energy |
| JP2009133676A (en) * | 2007-11-29 | 2009-06-18 | Sony Corp | Battery pack and charge/discharge method |
| JP2011095209A (en) * | 2009-11-02 | 2011-05-12 | Railway Technical Res Inst | Apparatus and program for estimating amount of discharge |
| CN103529393A (en) * | 2013-10-22 | 2014-01-22 | 南京汽车集团有限公司 | SOC (start of charge) estimation method of automobile power lithium battery |
| CN103728566A (en) * | 2013-12-20 | 2014-04-16 | 惠州市亿能电子有限公司 | Method for correcting SOC based on different temperature and rate charging curves |
| CN104062969A (en) * | 2014-07-04 | 2014-09-24 | 清华大学苏州汽车研究院（吴江） | Hardware-in-loop simulation testing system and testing method for automobile |
| CN104360286A (en) * | 2014-12-01 | 2015-02-18 | 重庆长安汽车股份有限公司 | Lithium ion battery charge state estimation modification method |
| CN105021996A (en) * | 2015-08-04 | 2015-11-04 | 深圳拓普科新能源科技有限公司 | Battery SOH (section of health) estimation method of energy storage power station BMS (battery management system) |
| WO2017016385A1 (en) * | 2015-07-27 | 2017-02-02 | 中兴通讯股份有限公司 | Estimation method and apparatus for state-of-charge value of battery |
-
2017
- 2017-03-29 CN CN201710200054.6A patent/CN108663621B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009133676A (en) * | 2007-11-29 | 2009-06-18 | Sony Corp | Battery pack and charge/discharge method |
| CN101303397A (en) * | 2008-06-25 | 2008-11-12 | 河北工业大学 | Method and apparatus for computing lithium ion batteries residual electric energy |
| JP2011095209A (en) * | 2009-11-02 | 2011-05-12 | Railway Technical Res Inst | Apparatus and program for estimating amount of discharge |
| CN103529393A (en) * | 2013-10-22 | 2014-01-22 | 南京汽车集团有限公司 | SOC (start of charge) estimation method of automobile power lithium battery |
| CN103728566A (en) * | 2013-12-20 | 2014-04-16 | 惠州市亿能电子有限公司 | Method for correcting SOC based on different temperature and rate charging curves |
| CN104062969A (en) * | 2014-07-04 | 2014-09-24 | 清华大学苏州汽车研究院（吴江） | Hardware-in-loop simulation testing system and testing method for automobile |
| CN104360286A (en) * | 2014-12-01 | 2015-02-18 | 重庆长安汽车股份有限公司 | Lithium ion battery charge state estimation modification method |
| WO2017016385A1 (en) * | 2015-07-27 | 2017-02-02 | 中兴通讯股份有限公司 | Estimation method and apparatus for state-of-charge value of battery |
| CN105021996A (en) * | 2015-08-04 | 2015-11-04 | 深圳拓普科新能源科技有限公司 | Battery SOH (section of health) estimation method of energy storage power station BMS (battery management system) |
Non-Patent Citations (2)
| Title |
|---|
| 刘莉 等: "基于锂电池SOC估算方法", 《电源技术》 * |
| 祁星鑫: "电池管理系统控制策略的开发", 《汽车实用技术》 * |
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