CN107783051A - Full charge capacity calibration method - Google Patents
Full charge capacity calibration method Download PDFInfo
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- CN107783051A CN107783051A CN201610799535.9A CN201610799535A CN107783051A CN 107783051 A CN107783051 A CN 107783051A CN 201610799535 A CN201610799535 A CN 201610799535A CN 107783051 A CN107783051 A CN 107783051A
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of full charge capacity calibration method, and it pre-establishes one first curve of a healthy battery (battery i.e. with low circulation number) and one first adjustment table, one second curve of an aged battery (battery i.e. with high circulation number) and one second adjustment table.First curve represents the OCV values of healthy battery and the relation of SOC value.Second curve represents the OCV values of aged battery and the relation of SOC value.First adjustment table represents the OCV values of healthy battery and the relation of one first adjusted value.Second adjustment table represents the OCV values of aged battery and the relation of one second adjusted value.Then the full charge capacity of battery is adjusted with number of charge cycles further according to the current OCV values of battery, current temperature, to obtain accurate full charge capacity accordingly.
Description
Technical field
The present invention on a kind of full charge capacity calibration method, and particularly a kind of degree of aging according to battery with instantly
Operation temperature calibrates the calibration method of full charge capacity.
Background technology
Recently, can the battery of discharge and recharge be widely used as mobile device, auxiliary power unit, electrical means of communication
(EV), the energy source of the electric hybrid vehicle (HEV) of oil, the electric hybrid vehicle (plug-in HEV) of plug-in type oil or like.Can
The battery of discharge and recharge is that the electric energy consumed originally supplement is returned by charging modes, and when full charging is to be related to electricity to battery
When pond stops receiving charging power.Therefore, determine battery correct full charge capacity (full charge capacity,
FCC) information is very important.
However, can discharge and recharge battery FCC information be easy to cell degradation with when lower operating temps and change.Its
In, cell degradation be represent battery by recharge (i.e. number of charge cycles (cycle count)) it is hundreds of time more than.Instantly grasp
It is the temperature for representing battery under actual operation as temperature.Therefore, how accurate measurement has different degree of agings with grasping instantly
The FCC for making the battery of temperature is critically important.
The content of the invention
Present invention full charge capacity (FCC) calibration method a kind of disclosed in an embodiment, suitable for estimating a battery
A full charge capacity.Full charge capacity calibration method comprises the following steps：Detection battery is in an open-circuit voltage (Open
Circuit Voltage, OCV) state；Analyze a current OCV values, a current temperature and a number of charge cycles for battery
(cycle count)；A healthy battery electric quantity according to corresponding to one first adjustment table adjusts OCV values at present in one first curve
(State-Of-Charge, SOC) value；Judge whether number of charge cycles is more than a predetermined number of times；If judge number of charge cycles
During more than a predetermined number of times, performing step includes：According to corresponding to one second adjustment table adjusts OCV values at present in one second curve
One aging SOC value；It is corresponding that number of charge cycles is calculated between the healthy SOC value after adjustment and the aging SOC value after adjustment
One current SOC value；And determine whether an initial value.If judgement is not when having initial value, using current SOC value as initial value,
An electricity of battery charge or discharge is accumulated, and rejudges whether battery is in OCV states., will if judgement has initial value
SOC value is as an end value at present, according to initial value, end value and the full charge capacity of the electricity estimation battery of accumulation, and clearly
Except initial value and end value.
Preferably, in full charge capacity calibration method, battery is in OCV status representative battery lasts to be stopped for a period of time
The state of charge or discharge.
Preferably, in full charge capacity calibration method, the first curve is mesh of the healthy battery at a temperature of one first
The relation of preceding OCV values and healthy SOC value, one the 3rd curve are current OCV value of the healthy battery at a temperature of one the 3rd and health
The relation of SOC value, the first adjustment table is current OCV values and the relation of one first adjusted value, and the first adjusted value is the first curve
Current OCV values corresponding to a difference between healthy SOC value healthy SOC value corresponding with the current OCV values of the 3rd curve.
Preferably, in the step of adjusting healthy SOC value, in addition to：It is corresponding that current OCV values are obtained in the first adjustment table
The first adjusted value；And the healthy SOC value according to corresponding to the first adjusted value adjusts OCV values at present in the first curve.
Preferably, in full charge capacity calibration method, the first temperature is higher than the 3rd temperature.
Preferably, in full charge capacity calibration method, the second curve is mesh of the aged battery under a second temperature
The relation of preceding OCV values and aging SOC value.One the 4th curve is current OCV value and aging of the aged battery at a temperature of one the 4th
The relation of SOC value.Second adjustment table is one second adjusted value corresponding to current OCV values, and the second adjusted value is the second curve
A difference between the aging SOC value corresponding with the current OCV values of the 4th curve of aging SOC value corresponding to OCV values at present.
Preferably, in the step of adjusting aging SOC value, in addition to：It is corresponding that current OCV values are obtained in the second adjustment table
The second adjusted value；And the aging SOC value according to corresponding to the second adjusted value adjusts OCV values at present in the second curve.
Preferably, in full charge capacity calibration method, second temperature is higher than the 4th temperature.
Preferably, in full charge capacity calibration method, if judge that number of charge cycles is less than or equal to predetermined number of times, hold
Row step includes：Determine whether initial value；If judgement is not when having initial value, using the healthy SOC value after adjustment as initial value,
The electricity of battery charge or discharge is accumulated, and rejudges whether battery is in OCV states；And if judge when having initial value,
Using the healthy SOC value after adjustment as end value, the full charge that battery is estimated according to initial value, end value and the electricity of accumulation is held
Amount, and remove initial value and end value.
Preferably, in full charge capacity calibration method, the first curve is strong for one with one first number of charge cycles
The relation of current OCV value of the health battery at a temperature of one first and healthy SOC value.Second curve is with one second charge cycle
The relation of current OCV value of one aged battery of number under a second temperature and aging SOC value.It is and secondary in calculating charge cycle
Corresponding to number the step of current SOC value in, in addition to：According to the first number of charge cycles and the second number of charge cycles, in tune
It is corresponding at present by an interpolation calculation number of charge cycles between healthy SOC value after whole and the aging SOC value after adjustment
SOC value.
Present invention full charge capacity calibration method a kind of disclosed in another embodiment, one suitable for estimating a battery
Full charge capacity.Full charge capacity calibration method comprises the following steps：Detection battery is in an open-circuit voltage (OCV) state；Point
Analyse a current OCV values, a current temperature and a number of charge cycles for battery；One first curve is adjusted according to one first adjustment table
In healthy battery electric quantity (SOC) value corresponding to OCV values at present；Judge whether number of charge cycles is more than a predetermined number of times；If
When judging that number of charge cycles is more than a predetermined number of times, performing step includes：One second curve is adjusted according to one second adjustment table
In an aging SOC value corresponding to OCV values at present；Calculate and fill between the healthy SOC value after adjustment and the aging SOC value after adjustment
A current SOC value corresponding to electric cycle times；And using current SOC value as an initial value, and accumulate an electricity of battery charging
Amount.When battery, which reaches, fills full state, full SOC value is filled as an end value to fill the one of full state, and according to initial value, knot
Beam value and the full charge capacity of the electricity estimation battery of accumulation, and remove initial value and end value.
Preferably, in full charge capacity calibration method, if judge that number of charge cycles is less than or equal to predetermined number of times, hold
Row step includes：Using the healthy SOC value after adjustment as initial value, and accumulate the electricity of battery charging；And when battery reaches
When filling full state, full SOC value is filled as end value using fill full state, and estimate according to the electricity of initial value, end value and accumulation
The full charge capacity of battery is surveyed, and removes initial value and end value.
In summary, a kind of full charge capacity calibration method disclosed in the embodiment of the present invention, it pre-establishes aging electricity
Pond (battery with high charge cycle times) and healthy battery (battery with low number of charge cycles) are at different temperatures
OCV values and SOC value relation.Then further according to the above-mentioned relation established, battery degree of aging and work as lower operating temps
To adjust the current full charge capacity of battery, to obtain accurate full charge capacity accordingly.
For the enabled feature and technology contents for being further understood that the present invention, refer to below in connection with the present invention specifically
Bright and accompanying drawing, but these explanations are intended merely to the explanation present invention with accompanying drawing, rather than interest field of the invention is made any
Limitation.
Brief description of the drawings
Fig. 1 is the schematic diagram that full charge capacity calibration method provided in an embodiment of the present invention is used for electronic installation.
Fig. 2 is the flow chart of full charge capacity calibration method provided in an embodiment of the present invention.
Fig. 3 A are the schematic diagrames of the first curve and the second curve provided in an embodiment of the present invention.
Fig. 3 B are the schematic diagrames of Fig. 3 A the first adjustment table.
Fig. 4 A are the schematic diagrames of the 3rd curve and the 4th curve provided in an embodiment of the present invention.
Fig. 4 B are the schematic diagrames of Fig. 4 A the second adjustment table.
Fig. 5 is the schematic diagram of the healthy SOC value and the aging SOC value after adjustment after adjustment provided in an embodiment of the present invention.
Fig. 6 is step S230 provided in an embodiment of the present invention details flow chart.
Fig. 7 is step S250 provided in an embodiment of the present invention details flow chart.
Fig. 8 is the flow chart for the full charge capacity calibration method that another embodiment of the present invention provides.
Embodiment
Hereinafter, the present invention will be described in detail by illustrating the various illustrative embodiments of the present invention.However, this
Inventive concept may embody in many different forms, and should not be construed as limited by exemplary embodiments set forth herein.
In addition, same reference numbers can be used to represent similar component in the accompanying drawings.
The embodiment of the present invention discloses a kind of full charge capacity calibration method, and it pre-establishes one first curve of healthy battery
With one first adjustment table, one second curve of aged battery and one second adjustment table.Wherein, the first curve, which represents, has low charging
The OCV values of the healthy battery of cycle times (such as 0 time) and the relation of SOC value.Second curve, which represents, has high charge cycle times
The OCV values of the aged battery of (such as 300 times) and the relation of SOC value.First adjustment table represents the OCV values and one first of healthy battery
The relation of adjusted value.Second adjustment table represents the OCV values of aged battery and the relation of one second adjusted value.OCV values represent battery
The measured voltage under no any discharge and recharge action of progress.SOC value represents the state of available electrical energy in battery, and generally
In per cent.Then filled further according to the current OCV values of battery, current temperature with number of charge cycles to adjust expiring for battery
Capacitance, to obtain accurate full charge capacity accordingly.Full charge capacity calibration disclosed by the invention described further below
Method.
First, Figure 1A is refer to, it shows that full charge capacity calibration method fills for electronics disclosed in the embodiment of the present invention
The schematic diagram put.As shown in figure 1, electronic installation 100 couples a battery 110, for estimating the full charge capacity of battery 110.
In the present embodiment, electronic installation 100 can be mobile device, auxiliary power unit, electrical means of communication (EV), the electric hybrid vehicle of oil
(HEV), the plug-in type electric hybrid vehicle (plug-in HEV) of oil or other the electronic installation of discharge and recharge can be carried out to battery 110, this
Invention is not restricted to this.
How electronic installation 100 described further below estimates the full charge capacity of battery 110.It please also refer to Fig. 2,
It shows the flow chart of full charge capacity calibration method disclosed in the embodiment of the present invention.First, electronic installation 100 will detect battery
Whether 110 be in an open-circuit voltage (OCV) state (step S210).OCV states are to represent that battery 110 carries out any fill no
State under discharging action.In the present embodiment, battery 110 is in OCV status representatives battery 110 and continues for some time that (such as 1 is small
When) stop charge or discharge state.
If electronic installation 100 detects battery 110 and is not at OCV states, it will detect whether battery 110 is in OCV shapes again
State.Next step is just carried out until the detection battery 110 of electronic installation 100 is in OCV states.Conversely, if electronic installation 100 is examined
When survey battery 110 is in OCV states, it will start to analyze a current OCV values of battery 110, a current temperature and a charge cycle
Number (i.e. battery 110 is by the number of recharge) (step S220).
Fig. 2, Fig. 3 A and Fig. 3 B are please also refer to, next, electronic installation 100 will be according to one first adjustment table Tb1 adjustment
Healthy SOC value (step S230) corresponding to current OCV values in one first curve Cv1.In the present embodiment, as shown in Figure 3A,
One curve Cv1 is the pass of current OCV value of the healthy battery (not being plotted in accompanying drawing) under one first temperature T1 and healthy SOC value
System.3rd curve Cv3 is the relation of current OCV value of the healthy battery under one the 3rd temperature T3 and healthy SOC value.Such as Fig. 3 B institutes
Show, the first adjustment table Tb1 is then current OCV values and the relation of one first adjusted value, and the first adjusted value is the first curve Cv1's
A difference between the healthy SOC value corresponding with the 3rd curve Cv3 current OCV values of healthy SOC value corresponding to OCV values at present.
In the present embodiment, user establishes the first curve Cv1, the 3rd curve Cv3 and the first adjustment table Tb1 in advance,
And first temperature T1 be higher than the 3rd temperature T3, by healthy battery when lower operating temps are taken into account.First curve Cv1 has
(such as Fig. 3 A the first temperature T1 is 25 to first number of charge cycles N1 (such as N1=0 times) healthy battery at the first temperature t 1
DEG C) OCV values and healthy SOC value relation, i.e., each OCV values can all correspond to some healthy SOC value.For example, Fig. 3 A
Current OCV values be 3.65 (V), its healthy SOC value corresponded to is 50%.3rd curve Cv3 is healthy battery in the 3rd temperature
The relation of the OCV values and healthy SOC value spent under T3 (such as Fig. 3 A the 3rd temperature T3 is 40 DEG C), i.e., each OCV values can all correspond to
To some healthy SOC value.For example, Fig. 3 A current OCV values are 3.65 (V), and its healthy SOC value corresponded to is 47%.
And the first adjustment table Tb1 is then current OCV values and the relation of one first adjusted value.First adjusted value is the first curve
One between the healthy SOC value corresponding with the 3rd curve Cv3 current OCV values of healthy SOC value corresponding to Cv1 current OCV values
Difference.For example, as shown in Figure 3A, the first curve Cv1 current OCV values are 3.65 (V), its healthy SOC value corresponded to
For 50%.3rd curve Cv3 current OCV values are 3.65 (V), and its healthy SOC value corresponded to is 47%.Therefore above-mentioned difference is
50%-47%=3%, i.e., the first adjusted value that current OCV values (3.65V) correspond to are 3%.Therefore, user can be in difference
OCV values under find corresponding to the first adjusted value, to form Fig. 3 B the first adjustment table Tb1 accordingly.
In step S230, also comprise the following steps, with electronic devices 100 according to the first adjustment table Tb1 adjustment first
Healthy SOC value corresponding to current OCV values in curve Cv1.Fig. 6 is please also refer to, it shows the step that the embodiment of the present invention discloses
S230 details flow chart.First, electronic installation 100 obtains the first adjustment corresponding to current OCV values in the first adjustment table Tb1
It is worth (step S610).Come again, electronic installation 100 will be according to corresponding to the first adjusted value adjusts OCV values at present in the first curve Cv1
Healthy SOC value (step S620).
For example, electronic installation 100 detects that the current OCV values of battery 110 are 3.65V, at present temperature in step 220
Spend for 30 DEG C, be 150 times with number of charge cycles.Now, electronic installation 100 will obtain current OCV in the first adjustment table Tb1
It is 3% to be worth the first adjusted value corresponding to (i.e. 3.65V).Then, electronic installation 100 will obtain in Fig. 3 A the first curve Cv1
Healthy SOC value corresponding to OCV values is 50% at present, and healthy SOC value is subtracted into the first adjusted value, i.e. 50%-3%=47%,
To complete the healthy SOC value after adjustment accordingly.Now, obtained in Fig. 3 A the first curve Cv1 healthy corresponding to current OCV values
SOC value, 47% will be adjusted to by 50%, the healthy SOC that the first curve Cv1 of healthy battery is adjusted to meet current temperature
Value.
Next, electronic installation 100 will determine that whether number of charge cycles is more than a predetermined number of times (step S240).It is if electric
Sub-device 100 judges that number of charge cycles is less than or equal to predetermined number of times, represents that the number of charge cycles of battery 110 is electric close to health
The number of charge cycles in pond (battery i.e. with low number of charge cycles), it is not necessary to consider aged battery (i.e. with high charge
The battery of cycle times) situation.Now, electronic installation 100 will perform step S255, S257 and S259, with bent according to first
The full charge capacity of the adjustment table Tb1 estimation batteries 110 of line Cv1 and first.
For further, in step S255-S259, whether electronic installation 100 will determine that first has initial value, with certainly
The fixed full charge capacity (step S255) that whether can calculate battery 110.If electronic installation 100 judges no initial value, represent
Not yet obtain the information (i.e. initial value, end value and the electricity of accumulation) for the full charge capacity for calculating battery 110 enough.Now,
Electricity (step of the electronic installation 100 using the healthy SOC value after adjustment as initial value, then the accumulation charge or discharge of battery 110
S257).In the present embodiment, the electricity of accumulation is the electricity accumulated for a period of time in lasting charge or discharge, or
Multiple discontinuous chargings or lower the accumulated electricity of discontinuous electric discharge.And the electricity accumulated can also accumulate modes, this hair for other
It is bright that this is not restricted.
Accept above-mentioned example, if predetermined number of times be set as 20 times, the number of charge cycles of battery 110 be 10 times and electronics
For device 100 to perform step S220-S240 for the first time, electronic installation 100 will determine that no initial value.Now, electronic installation 100
By the healthy SOC value after adjustment, i.e., 47% is used as initial value, and then accumulates the electricity of the charge or discharge of battery 110, such as holds
The electricity that continuous charge or discharge are accumulated for a period of time is 4 ampere-hours (Ah).After execution of step S257, electronic installation 100 will
Rejudge whether battery is in OCV states (returning to step S210), to perform step S220-S240 next time.
Conversely, if electronic installation 100 judges there is initial value, represent to have obtained the full charge capacity for calculating battery 110 enough
Information.Now, electronic installation 100 is using the healthy SOC value after adjustment as end value, then according to initial value, end value with
The electricity estimation full charge capacity of accumulation, and remove initial value and end value (step S259).In the present embodiment, full charge is held
Amount is calculated by a FCC equations to obtain, and FCC equations are as follows：The electricity of full charge capacity (FCC)=accumulation/(knot
Beam value-initial value).
Accept above-mentioned example, electronic installation 100 by first time perform step S220-S240 obtain initial value for 47%,
The electricity of accumulation is 4Ah.In second of the execution step S220-S240 of electronic installation 100, electronic installation 100 will determine that
Initial value.Now, the healthy SOC value that electronic installation 100 performs after adjustment caused by step S220-S240 second is as knot
Beam value, such as end value are 85%.Electronic installation 100 will be calculated by FCC equations to obtain full charge capacity, i.e. full charge
Capacity (FCC)=4/ (85%-47%)=10.5Ah.In another example initial value is 47%, the electricity of accumulation is 5.5Ah, and terminate
Being worth will be calculated to obtain full charge capacity, i.e. full charge for 100% (filling full state), electronic installation 100 by FCC equations
Capacity (FCC)=5.5/ (100%-47%)=10.4Ah.After full charge capacity is calculated, electronic installation 100 will be removed
Initial value and end value, to complete to estimate the full charge capacity of battery 110.Again come, electronic installation 100 can according to actual state,
Stop the full charge capacity of estimation battery 110, estimate after a period of time the full charge capacity of battery 110 again, or immediately again
Judge whether battery is in OCV states (returning to step S210), the invention is not limited in this regard.
Accordingly, electronic installation 100 can estimate battery 110 in current temperature (i.e. 30 DEG C) and cycle-index (i.e. 10 times)
Under full charge capacity, full charge capacity is corrected to the full charge capacity for more meeting the As-Is of battery 110.
Step S240 is gone back to again and please also refer to Fig. 2, Fig. 4 A and Fig. 4 B, if electronic installation 100 judges charge cycle
Number is more than predetermined number of times, represents the number of charge cycles of battery close to the aged battery (electricity i.e. with high charge cycle times
Pond) number of charge cycles, it is necessary to consider the situation of aged battery.Now, electronic installation 100 will be according to one second adjustment table
Tb2 adjusts aging SOC value (step S250) corresponding to current OCV values in one second curve Cv2.In the present embodiment, such as Fig. 4 A
Shown, the second curve Cv2 is current OCV value and aging of the aged battery (not being plotted in accompanying drawing) under a second temperature T2
The relation of SOC value.4th curve Cv4 is the pass of current OCV value of the aged battery under one the 4th temperature T4 and aging SOC value
System.As shown in Figure 4 B, the second adjustment table Tb2 is then current OCV values and the relation of one second adjusted value, and the second adjusted value is the
The aging SOC value corresponding with the 4th curve Cv4 current OCV values of aging SOC value corresponding to two curve Cv2 current OCV values it
Between a difference.
In the present embodiment, user establishes the second curve Cv2, the 4th curve Cv4 and the second adjustment table Tb2 in advance,
And second temperature T2 is higher than the 4th temperature T4, by aged battery when lower operating temps are taken into account.Second curve Cv2 has
The aged battery of second circulation times N 2 (such as N2=300 times) is at second temperature T 2 (such as Fig. 4 A second temperature T2 is 25 DEG C)
OCV values and aging SOC value relation, i.e., each OCV values can all correspond to some aging SOC value.For example, Fig. 4 A mesh
Preceding OCV values are 3.65 (V), and its aging SOC value corresponded to is 45%.4th curve Cv4 is aged battery in the 4th temperature T4
The relation of OCV values and aging SOC value under (such as Fig. 4 A the 4th temperature T4 is 40 DEG C), i.e., each OCV values can all correspond to certain
Individual aging SOC value.For example, Fig. 4 A current OCV values are 3.65 (V), and its aging SOC value corresponded to is 42%.
And the second adjustment table Tb2 is then current OCV values and the relation of one second adjusted value.Second adjusted value is the second curve
One between the aging SOC value corresponding with the 4th curve Cv4 current OCV values of aging SOC value corresponding to Cv2 current OCV values
Difference.For example, as shown in Figure 4 A, the second curve Cv2 current OCV values are 3.65 (V), its healthy SOC value corresponded to
For 45%.4th curve Cv4 current OCV values are 3.65 (V), and its healthy SOC value corresponded to is 42%.Therefore above-mentioned difference is
45%-42%=3%, i.e., the second adjusted value that current OCV values (3.65V) correspond to are 3%.Therefore, user can be in difference
OCV values under find corresponding to the second adjusted value, to form Fig. 4 B the second adjustment table Tb2 accordingly.
In step s 250, also comprise the following steps, with electronic devices 100 according to the second adjustment table Tb2 adjustment second
Current aging SOC value corresponding to OCV values in curve Cv2.Fig. 7 is please also refer to, it shows the step that the embodiment of the present invention discloses
S250 details flow chart.First, electronic installation 100 obtains the second adjustment corresponding to current OCV values in the second adjustment table Tb2
It is worth (step S710).Come again, electronic installation 100 will be according to corresponding to the second adjusted value adjusts OCV values at present in the second curve Cv2
Aging SOC value (step S720).
For example, electronic installation 100 detects that the current OCV values of battery 110 are 3.65V, at present temperature in step 220
Spend for 30 DEG C, be 150 times with number of charge cycles.Now, electronic installation 100 will obtain current OCV in the second adjustment table Tb2
It is 3% to be worth the second adjusted value corresponding to (i.e. 3.65V).Then, electronic installation 100 will obtain in Fig. 4 A the second curve Cv2
Aging SOC value corresponding to OCV values is 45% at present, and aging SOC value is subtracted into the second adjusted value, i.e. 45%-3%=42%,
To complete the aging SOC value after adjustment accordingly.Now, aging corresponding to current OCV values is obtained in Fig. 4 A the second curve Cv2
SOC value, 42% will be adjusted to by 45%, the aging SOC that the second curve Cv2 of aged battery is adjusted to meet current temperature
Value.
As shown in figure 5, the first curve Cv1 be the healthy battery with the first number of charge cycles N1 (i.e. 0 time) first
The relation of current OCV values and healthy SOC value under temperature T1 (i.e. 25 DEG C).Second curve Cv2 is with the second charge cycle
The relation of the current OCV values of number N2 (i.e. 300 times) aged battery at second temperature T 2 and aging SOC value.Because electronics fills
100 are put by healthy battery and aged battery when lower operating temps are taken into account so that the first curve Cv1 current OCV values are (i.e.
Healthy SOC value (i.e. 50%) corresponding to 3.65V) will move to left the first adjusted value (i.e. 3%) and turn into the healthy SOC value after adjustment
(i.e. 47%), and aging SOC value (i.e. 45%) will move to left second corresponding to the second curve Cv2 current OCV values (i.e. 3.65V)
Adjusted value (i.e. 3%) and as adjustment after aging SOC value (i.e. 42%).
After the aging SOC value after obtaining the healthy SOC value after adjusting and adjustment, electronic installation 100 will after the adjustment
Healthy SOC value and adjustment after aging SOC value between calculate the corresponding current SOC value (step of number of charge cycles
S260).For further, electronic installation 100 will according to the first number of charge cycles N1 and the second number of charge cycles N2, in
Between the aging SOC value after healthy SOC value and adjustment after adjustment, pass through mesh corresponding to an interpolation calculation number of charge cycles
Preceding SOC value.
Above-mentioned example is accepted, the healthy SOC value after adjustment is 47% (corresponding to the first number of charge cycles N1=0 times),
Aging SOC value after adjustment is 42% (corresponding to the second number of charge cycles N2=300 times), and number of charge cycles is then
150 times.Therefore, electronic installation 100 will lead to according to interpolation method between 47% (corresponding to 0 time) and 42% (corresponding to 300 times)
It is 44.5% to cross interpolation calculation to go out the numerical value of 150 times, and using 44.5% as current SOC value corresponding to number of charge cycles.
Now, the corresponding current SOC of number of charge cycles as acquired by the healthy SOC value after adjusting with the aging SOC value after adjustment
Value, will meet the current temperature and number of charge cycles of battery 110.
After current SOC value (i.e. step S260) corresponding to the number of charge cycles of battery 110 is obtained, electronic installation 100
Whether have initial value, to decide whether that the full charge capacity (step S270) of battery 110 can be calculated if then will determine that.If electronics
Device 100 judges no initial value, represent not yet to obtain the full charge capacity for calculating battery 110 enough information (i.e. initial value,
End value and the electricity of accumulation).Now, electronic installation 100 is then accumulated battery 110 and charged using current SOC value as initial value
Or the electricity (step S280) of electric discharge.In the present embodiment, the electricity of accumulation is tired out for a period of time in lasting charge or discharge
Long-pending electricity, or the electricity accumulated under multiple discontinuous chargings or discontinuous electric discharge.And the electricity accumulated also can be
Other accumulation modes, the invention is not limited in this regard.
Accept above-mentioned example, if predetermined number of times be set as 20 times, the number of charge cycles of battery 110 be 150 times and electronics
For device 100 to perform step S250-S260 for the first time, electronic installation 100 will determine that no initial value.Now, electronic installation 100
By current SOC value, i.e., 44.5% is used as initial value, and then accumulates the electricity of the charge or discharge of battery 110, such as lasting charging
Or the electricity that electric discharge a period of time is accumulated is 6Ah.After execution of step S280, electronic installation 100 will rejudge battery
Whether OCV states (returning to step S210) are in, to re-execute a step S220-S260.
Conversely, if electronic installation 100 judges there is initial value, represent to have obtained the full charge capacity for calculating battery 110 enough
Information.Now, electronic installation 100 is using current SOC value as end value, then according to initial value, end value and the electricity of accumulation
Amount estimation full charge capacity, and remove initial value and end value (step S290).In the present embodiment, full charge capacity is equally logical
Cross a FCC equations to calculate and obtain, FCC equations are as follows：The electricity of full charge capacity (FCC)=accumulation/(end value-
Initial value).
Above-mentioned example is accepted, electronic installation 100 obtains initial value by first time execution step S220-S260 and is
44.5%th, the electricity of accumulation is 6Ah.In second of the execution step S220-S260 of electronic installation 100, electronic installation 100 will be sentenced
It is disconnected to have initial value.Now, the healthy SOC value that electronic installation 100 performs after adjustment caused by step S220-S260 second
As end value, such as end value is 85%.To obtain full charge capacity, i.e., electronic installation 100 will be calculated by FCC equations
Full charge capacity (FCC)=6/ (85%-44.5%)=14.8Ah.In another example initial value is 44.5%, the electricity of accumulation is
7.5Ah, and end value is 100% (i.e. fully charged), electronic installation 100 will be calculated by FCC equations to be held to obtain full charge
Amount, i.e. full charge capacity (FCC)=7.5/ (100%-44.5%)=13.5Ah.After full charge capacity is calculated, electronics dress
Initial value and end value will be removed by putting 100, to complete to estimate the full charge capacity of battery 110.Come again, electronic installation 100 can
According to actual state, the full charge for stop the full charge capacity of estimation battery 110, estimating after a period of time battery 110 again is held
Amount, or rejudge whether battery is in OCV states (returning to step S210), the invention is not limited in this regard immediately.
Accordingly, electronic installation 100 can estimate battery 110 in current temperature (i.e. 30 DEG C) and number of charge cycles (i.e.
150 times) under full charge capacity, full charge capacity is corrected to the full charge capacity for more meeting the As-Is of battery 110.
In other embodiments, electronic installation 100 estimates the full charge capacity of battery 110 by another way.Please
With reference to Fig. 1 and Fig. 8.Fig. 8 shows the flow chart of full charge capacity calibration method disclosed in another embodiment of the present invention.And have
Close step S310, S320, S330, S340, S350 and S360 generally with the step S210-S260 in Fig. 2 previous embodiment
It is identical, therefore will not be repeated here.
Different places are, if electronic installation 100 judges that number of charge cycles is less than or equal to predetermined number of times, represent battery
110 number of charge cycles is not required to close to the number of charge cycles of healthy battery (battery i.e. with low number of charge cycles)
Consider the situation of aged battery (battery i.e. with high charge cycle times).Now, electronic installation 100 will perform step
S345 and S347, i.e., one is directly charged to battery 110 and fills full state (Full Charge), and according to the first curve Cv1 and
The full charge capacity of one adjustment table Tb1 estimation batteries 110.
For further, in step S345-S347, electronic installation 100 is using the healthy SOC value after adjustment as starting
Value, and accumulate the electricity (step S345) that battery 110 charges.In the present embodiment, the electricity of accumulation is in lasting one section of charging
The electricity that time is accumulated.And when battery 110 reaches and fills full state, electronic installation 100 by with fill the one of full state fill it is full
SOC value estimates the full charge capacity of battery as end value, and according to initial value, end value and the electricity of accumulation, and removes
Initial value and end value.In the present embodiment, full SOC value is filled for 100%.And full charge capacity be by FCC equations calculate and
, FCC equations are as follows：The electricity of full charge capacity (FCC)=accumulation/(end value-initial value).
The example of Fig. 2 previous embodiments is accepted, if predetermined number of times is set as 20 times, and the number of charge cycles of battery 110
For 10 times, electronic installation 100 will determine that number of charge cycles is less than or equal to predetermined number of times.Now, after electronic installation 100 will adjust
Healthy SOC value, i.e., 47% is used as initial value, and then accumulates the electricity that battery 110 charges, such as persistently charges to full shape
The electricity that state (i.e. end value is by 100%) is accumulated is 5.5Ah.Electronic installation 100 will be calculated by FCC equations to be expired
Charging capacity, i.e. full charge capacity (FCC)=5.5/ (100%-47%)=10.4Ah.After full charge capacity is calculated, electricity
Sub-device 100 will remove initial value and end value, to complete to estimate the full charge capacity of battery 110.Come again, electronic installation 100
The full charge capacity of estimation battery 110 according to actual state, can be stopped, expiring for battery 110 is estimated again after a period of time and fill
Capacitance, or rejudge whether battery is in OCV states (returning to step S310), the invention is not limited in this regard immediately.
Accordingly, electronic installation 100 can estimate battery 110 in current temperature (i.e. 30 DEG C) and cycle-index (i.e. 10 times)
Under full charge capacity, full charge capacity is corrected to the full charge capacity for more meeting the As-Is of battery 110.
Step S340 is gone back to again and please also refer to Fig. 8, if electronic installation 100 judges number of charge cycles more than set
Number, represent the number of charge cycles of battery 110 close to the charging of aged battery (battery i.e. with high charge cycle times)
Cycle times are, it is necessary to consider the situation of aged battery.Now electronic installation 100 will perform step S350-S360, S370 with
S380.And embodiment related step S350-S360 is generally identical with the step S250-S260 of Fig. 2 previous embodiments, therefore
It will not be repeated here.
Therefore, after electronic installation 100 obtains current SOC value (i.e. step S360), electronic installation 100 will then perform step
Rapid S370-S380, i.e., one is directly charged to battery 110 and fills full state (Full Charge), is filled with estimating expiring for battery 110
Capacitance.For further, in step S370-S380, electronic installation 100 is accumulated using current SOC value as initial value
The electricity (step S370) that battery 110 charges.In the present embodiment, the electricity of accumulation was accumulated in lasting charging a period of time
Electricity.And when battery 110 reaches and fills full state, electronic installation 100 will fill full SOC value as knot to fill the one of full state
Beam value, and the full charge capacity of battery is estimated according to initial value, end value and the electricity of accumulation, and initial value is removed with terminating
Value.In the present embodiment, full SOC value is filled for 100%.And full charge capacity is calculated by FCC equations to obtain, FCC equations
Sequence is as follows：The electricity of full charge capacity (FCC)=accumulation/(end value-initial value).
The example of Fig. 2 previous embodiments is accepted, electronic installation 100 obtains initial value by performing step S320-S360 and is
44.5%, and it is 7.5Ah persistently to charge to the electricity that full state (i.e. end value is by 100%) is accumulated.Electronic installation 100 will
Calculated by FCC equations to obtain full charge capacity, i.e., full charge capacity (FCC)=7.5/ (100%-44.5%)=
13.5Ah.After full charge capacity is calculated, electronic installation 100 will remove initial value and end value, to complete to estimate battery 110
Full charge capacity.Again come, electronic installation 100 can according to actual state, stop estimation battery 110 full charge capacity, in
The full charge capacity of battery 110 is estimated after a period of time again, or rejudges whether battery (returns in OCV states immediately
Step S310), the invention is not limited in this regard.
Accordingly, electronic installation 100 can estimate battery 110 in current temperature (i.e. 30 DEG C) and number of charge cycles (i.e.
150 times) under full charge capacity, full charge capacity is corrected to the full charge capacity for more meeting the As-Is of battery 110.
In summary, the embodiment of the present invention discloses a kind of full charge capacity calibration method, and it pre-establishes aged battery (tool
Have the battery of high charge cycle times) OCV with the healthy battery battery of low number of charge cycles (have) at different temperatures
The relation of value and SOC value.Then further according to the above-mentioned relation established, battery degree of aging with adjusting when lower operating temps
The current full charge capacity of battery, to obtain accurate full charge capacity accordingly.
It is described above, it is only the optimal specific embodiment of the present invention, and the feature of the present invention is not limited thereto, Ren Heben
Art personnel in the field of the invention, can think easily and change or modification, can all cover the patent in following this case
Scope.
Claims (12)
1. a kind of full charge capacity calibration method, the full charge capacity suitable for estimating a battery, it is characterised in that this completely fills
Capacitance calibration method includes：
Detect the battery and be in an open circuit voltage conditions；
Analyze a current open-circuit voltage values, a current temperature and a number of charge cycles for the battery；
A healthy battery electric quantity value according to corresponding to one first adjustment table adjusts the current open-circuit voltage in one first curve；
Judge whether the number of charge cycles is more than a predetermined number of times；
If judge that the number of charge cycles is more than a predetermined number of times, performing step includes：
An aged battery charge value according to corresponding to one second adjustment table adjusts the current open-circuit voltage in one second curve；
The charge cycle is calculated between the healthy battery electric quantity value after adjustment and the aged battery charge value after adjustment
A current battery charge value corresponding to number；And
Determine whether an initial value；
Wherein, if judge without the initial value, using the current battery charge value as the initial value, accumulate battery charging or
One electricity of electric discharge, and rejudge whether the battery is in the open circuit voltage conditions；
Wherein, if judge to have the initial value, using the current battery charge value as an end value, according to the initial value, the knot
Beam value and the electricity of accumulation estimate the full charge capacity of the battery, and remove the initial value and the end value.
2. full charge capacity calibration method as claimed in claim 1, it is characterised in that the battery is in the open circuit voltage conditions
Represent the state that the battery last stops charge or discharge for a period of time.
3. full charge capacity calibration method as claimed in claim 1, it is characterised in that first curve is that a healthy battery exists
The relation of the current open-circuit voltage values and the healthy battery electric quantity value at a temperature of one first, one the 3rd curve is the healthy battery
The relation of the current open-circuit voltage values and the healthy battery electric quantity value at a temperature of one the 3rd, the first adjustment table are current for this
Open-circuit voltage values and the relation of one first adjusted value, and first adjusted value is the current open-circuit voltage values pair of first curve
Between the healthy battery electric quantity value healthy battery electric quantity value corresponding with the current open-circuit voltage values of the 3rd curve answered
A difference.
4. full charge capacity calibration method as claimed in claim 3, it is characterised in that in adjusting the healthy battery electric quantity value
In step, in addition to：
First adjusted value corresponding to the current open-circuit voltage values is obtained in the first adjustment table；And
The healthy battery electric quantity value according to corresponding to first adjusted value adjusts the current open-circuit voltage values in first curve.
5. full charge capacity calibration method as claimed in claim 3, it is characterised in that first temperature is higher than the 3rd temperature
Degree.
6. full charge capacity calibration method as claimed in claim 1, it is characterised in that second curve is that an aged battery exists
The current open-circuit voltage values and the relation of the aged battery charge value under one second temperature, one the 4th curve is the aged battery
The current open-circuit voltage values and the relation of the aged battery charge value at a temperature of one the 4th, the second adjustment table are current for this
One second adjusted value corresponding to open-circuit voltage values, and second adjusted value is corresponding for the current open-circuit voltage values of second curve
Aged battery charge value aged battery charge value corresponding with the current open-circuit voltage values of the 4th curve between
One difference.
7. full charge capacity calibration method as claimed in claim 5, it is characterised in that in adjusting the aged battery charge value
In step, in addition to：
Second adjusted value corresponding to the current open-circuit voltage values is obtained in the second adjustment table；And
The aged battery charge value according to corresponding to second adjusted value adjusts the current open-circuit voltage values in second curve.
8. full charge capacity calibration method as claimed in claim 5, it is characterised in that the second temperature is higher than the 4th temperature
Degree.
9. full charge capacity calibration method as claimed in claim 1, it is characterised in that the number of charge cycles is less than if judging
During equal to the predetermined number of times, performing step includes：
Determine whether the initial value；
If judge without the initial value, using the healthy battery electric quantity value after adjustment as the initial value, accumulate the battery and fill
Electricity or the electricity of electric discharge, and rejudge whether the battery is in the open circuit voltage conditions；And
If judgement has the initial value, using the healthy battery electric quantity value after adjustment as the end value, according to the initial value, it is somebody's turn to do
End value and the electricity of accumulation estimate the full charge capacity of the battery, and remove the initial value and the end value.
10. full charge capacity calibration method as claimed in claim 1, it is characterised in that first curve is with one first
The current open-circuit voltage values of one healthy battery of number of charge cycles at a temperature of one first and the healthy battery electric quantity value
Relation, second curve are the current open circuit of the aged battery with one second number of charge cycles under a second temperature
The relation of magnitude of voltage and the aged battery charge value, and in calculating the current battery charge value corresponding to the number of charge cycles
In step, in addition to：
According to first number of charge cycles and second number of charge cycles, the healthy battery electric quantity value after adjustment is with adjusting
Pass through the current battery electricity corresponding to the interpolation calculation number of charge cycles between the aged battery charge value after whole
Value.
11. a kind of full charge capacity calibration method, the full charge capacity suitable for estimating a battery, it is characterised in that this is full
Charging capacity calibration method includes：
Detect the battery and be in an open circuit voltage conditions；
Analyze a current open-circuit voltage values, a current temperature and a number of charge cycles for the battery；
A healthy battery electric quantity value according to corresponding to one first adjustment table adjusts the current open-circuit voltage values in one first curve；
Judge whether the number of charge cycles is more than a predetermined number of times；
If judge that the number of charge cycles is more than a predetermined number of times, performing step includes：
An aged battery charge value according to corresponding to one second adjustment table adjusts the current open-circuit voltage values in one second curve；
The charge cycle is calculated between the healthy battery electric quantity value after adjustment and the aged battery charge value after adjustment
A current battery charge value corresponding to number；And
Using the current battery charge value as an initial value, and accumulate an electricity of battery charging；
Wherein, when the battery, which reaches, fills full state, a full charging pond charge value of full state is filled as an end value using this,
And the full charge capacity of the battery is estimated according to the initial value, the end value and the electricity of accumulation, and remove the initial value
With the end value.
12. full charge capacity calibration method as claimed in claim 11, it is characterised in that the number of charge cycles is small if judging
When equal to the predetermined number of times, performing step includes：
Using the healthy battery electric quantity value after adjustment as the initial value, and accumulate the electricity of battery charging；And
When the battery, which reaches this, fills full state, the full charging pond charge value of full state is filled as the end value using this, and root
Estimate the full charge capacity of the battery according to the initial value, the end value and the electricity of accumulation, and remove the initial value with being somebody's turn to do
End value.
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| CN116930790A (en) * | 2023-09-15 | 2023-10-24 | 深圳市海雷新能源有限公司 | Electric quantity calibration method for intelligent battery |
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| TWI685665B (en) * | 2018-12-03 | 2020-02-21 | 大陸商太普動力新能源（常熟）股份有限公司 | Battery management method for charging a battery in two stages |
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Also Published As
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| TWI613454B (en) | 2018-02-01 |
| CN107783051B (en) | 2020-08-21 |
| TW201809714A (en) | 2018-03-16 |
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