CN103630847B - A kind of energy storage battery test method - Google Patents
A kind of energy storage battery test method Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 91
- 238000010998 test method Methods 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 111
- 230000011218 segmentation Effects 0.000 claims abstract description 86
- 238000007599 discharging Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 24
- 230000002950 deficient Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 7
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 21
- 229910052744 lithium Inorganic materials 0.000 abstract description 21
- 230000032683 aging Effects 0.000 abstract description 4
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- 238000007619 statistical method Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
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Abstract
The present invention relates to technical field of electric power, is a kind of energy storage battery test method concretely.Comprise, the probability of real power in each power segmentation of record energy-storage battery charging and discharging; According to the real power probability in power segmentation, power interval is merged in described power segmentation; Calculate measured power and the test duration of real power in described power interval; According to described measured power and test duration, the charging and discharging test of pre-determined number is carried out to energy-storage battery.By the embodiment of the invention described above, the test method of the service life cycle based on typical operating condition can be provided for energy-storage lithium battery group, inspection energy-storage lithium battery is following the tracks of the ageing of performance situation under plan generating, honourable power smooth, peak load shifting three kinds of operational modes, for the production of energy-storage lithium battery, operation, maintenance provide guidance, ensure lithium battery energy storage battery security of system, stable, run efficiently.
Description
Technical field
The present invention relates to technical field of electric power, is a kind of energy storage battery test method concretely.
Background technology
The problems such as the intermittence brought along with the development of new forms of energy, undulatory property and the quality of power supply, energy storage technology obtains increasing concern.But for energy-storage battery life-span, use in the problem that there will be, not deep research, also lacks corresponding research means.
Because energy-storage battery is that charging and discharging uses in Long time scale, existing battery performance test method is all inapplicable; And energy-storage battery needs the power parameter of test battery, adds difficulty to test.
Summary of the invention
For research energy-storage battery life-span and performance provide test method, solve energy-storage battery with wind-powered electricity generation, photovoltaic with the use of process in the performance degradation problem that may occur, for energy-storage battery is reasonable, effective use provides technical basis, the embodiment of the present invention proposes a kind of energy storage battery test method, the operating mode of Reality simulation energy-storage battery energy-storage battery to be measured can be detected, obtain the information of energy-storage battery quality accurately.
Embodiments provide a kind of energy storage battery test method, comprise,
The probability of real power in each power segmentation of record energy-storage battery charging and discharging;
According to the real power probability in power segmentation, power interval is merged in described power segmentation;
Calculate measured power and the test duration of real power in described power interval;
According to described measured power and test duration, the charging and discharging test of pre-determined number is carried out to energy-storage battery.
According to a further aspect of a kind of energy storage battery test method that the embodiment of the present invention provides, described power is segmented into, and is divided into n section according to rated power number percent, described n be more than or equal to 2 positive integer.
According to another the further aspect of a kind of energy storage battery test method that the embodiment of the present invention provides, described power is segmented into, and is divided into n section according to rated power number percent, described n be more than or equal to 2 positive integer.
According to another the further aspect of a kind of energy storage battery test method that the embodiment of the present invention provides, comprise further power interval being merged in described power segmentation according to the real power probability in power segmentation, power segmentation close for real power probability in described power segmentation is merged.
According to another the further aspect of a kind of energy storage battery test method that the embodiment of the present invention provides, comprise further power interval being merged in described power segmentation according to the real power probability in power segmentation, be segmented into center with the power that real power probability is high, the power segmentation of both sides real power probability almost symmetry is merged.
According to another the further aspect of a kind of energy storage battery test method that the embodiment of the present invention provides, the measured power and the test duration that calculate real power in described power interval comprise further, and in described power interval, the average power of real power is as described measured power:
Wherein, α
ifor the probability of power segmentation each in power interval;
P
ifor the intermediate value of power segmentation each in power interval;
P
avefor the average power of real power in power interval;
The described test duration is:
Wherein, α
ifor the probability of power segmentation each in power interval;
T
norfor the accumulator system specified discharge and recharge time;
T is the test period of power interval.
According to another the further aspect of a kind of energy storage battery test method that the embodiment of the present invention provides, further comprise in the charging and discharging test according to described measured power and test duration energy-storage battery being carried out to pre-determined number, according to following formulae discovery test efficiency for charge-discharge η, close with the efficiency for charge-discharge η in actual motion by regulating the measured power of discharge and recharge different phase in process of the test and test duration to ensure:
In formula: E
dis---the rechargeable energy of a circulation in test;
E
ch---the discharge energy of a circulation in test;
P
disiit is the measured power of i-th discharge range;
P
chiit is the measured power between i-th charging zone;
T
disiit is the test duration of i-th discharge range;
T
chiit is the test duration between i-th charging zone;
η is test efficiency for charge-discharge.
According to another the further aspect of a kind of energy storage battery test method that the embodiment of the present invention provides, further comprise after the charging and discharging test according to described measured power and test duration energy-storage battery being carried out to pre-determined number, in discharge test, if described energy-storage battery voltage reaches final discharging voltage lower limit, and cycle index does not reach described pre-determined number, then export defective result.
According to another the further aspect of a kind of energy storage battery test method that the embodiment of the present invention provides, further comprise after the charging and discharging test according to described measured power and test duration energy-storage battery being carried out to pre-determined number, in charging measurement, if after each charging measurement terminates, when described energy-storage battery residual capacity is less than predetermined threshold, then export defective result.
By the embodiment of the invention described above, the test method of the service life cycle based on typical operating condition can be provided for energy-storage lithium battery group, inspection energy-storage lithium battery is following the tracks of the ageing of performance situation under plan generating, honourable power smooth, peak load shifting three kinds of operational modes, for the production of energy-storage lithium battery, operation, maintenance provide guidance, ensure lithium battery energy storage battery security of system, stable, run efficiently.
Accompanying drawing explanation
Read the detailed description to embodiment in conjunction with the following drawings, above-mentioned feature and advantage of the present invention, and extra feature and advantage, will be more readily apparent from.
Figure 1 shows that the process flow diagram of a kind of energy storage battery test method of inventive embodiments;
Figure 2 shows that the particular flow sheet of a kind of energy storage battery test method of the embodiment of the present invention;
Charging real power probability graph shown in Fig. 3 A;
Electric discharge real power probability graph shown in Fig. 3 B;
Fig. 4 A is depicted as the actual charge power probability graph after charge power segmentation merges;
Fig. 4 B is depicted as the actual discharge power probability figure after discharge power segmentation merges;
Schematic diagram in shown in Fig. 5 an one discharge and recharge test cycle.
Embodiment
Description below can make any those skilled in the art utilize the present invention.Specific embodiment and the descriptor provided in applying are only example.Various extension and the combination of embodiment as described herein are apparent for those skilled in the art, and when not departing from the spirit and scope of the invention, the rule of the present invention's definition can be applied in other embodiments and application.Therefore, the present invention is not only limited to shown embodiment, and the maximum magnitude consistent with principle shown in this paper and feature is contained in the present invention.
Be illustrated in figure 1 the process flow diagram of a kind of energy storage battery test method of inventive embodiments.
Comprise step 101, the probability of real power in each power segmentation of record energy-storage battery charging and discharging.
As one embodiment of the present of invention, described power is segmented into, and is divided into n section according to rated power number percent, described n be more than or equal to 2 positive integer, such as can be divided into one section by 1%-3%, 4%-9% is divided into one section, 10%-12% is divided into one section, namely uneven segmented mode.Compared with homogenous segmentations, the situation of the more realistic operate power of uneven segmentation, because the power distribution that probability is close in actual motion is uneven often.Simultaneously, uneven segmented mode is also conducive to the test method in this invention to extend to the accumulator system under other operational mode or mixed running pattern, such as hopping pattern, or the mixed running pattern of honourable power smooth and peak load shifting, because accumulator system power distribution situation is different under different operational mode.Adopt uneven segmented mode, make the present invention have greater flexibility, the needs of energy-storage lithium battery circular flow working condition measurement can be met in a wider context.
As one embodiment of the present of invention, described power is segmented into, and is divided into n section according to rated power number percent, described n be more than or equal to 2 positive integer, can be preferably 20, one section can be divided into by 1%-5%, 6%-10% is divided into one section, and 11%-15% is divided into one section, i.e. homogenous segmentations mode.Compared with uneven segmented mode, homogenous segmentations is conducive to the statistic processes simplifying actual motion power: first uneven segmented mode is the probability enumerating the appearance of all performance numbers, then according to the distribution situation of probability, performance number close for probability is divided into power segmentation, its power probability statistical method is complicated, and workload is large; Homogenous segmentations mode first carries out anticipation to power distribution, thus determine power segments n, and then add up the power probability in different equal segments, its power probability statistical method is simple, and workload is little.
Step 102, merges into power interval according to the real power probability in power segmentation by described power segmentation.
As one embodiment of the present of invention, comprise further and power segmentation close for real power probability in described power segmentation is merged.
As one embodiment of the present of invention, comprise further, be segmented into center with the power that real power probability is high, the power segmentation of both sides real power probability almost symmetry is merged, merges into power interval.On the one hand can short form test flow process by this step, numerous Sectional Test steps is reduced to a small amount of interval test procedure, be convenient to the realization of process of the test in actual hardware system, be conducive to the feasibility improving test method, on the other hand, according to the standardization principle of probability statistics, power segmentation is merged into the process of power interval, also be eliminate to be added up " minority " accumulator system and to exert oneself the process of " individual character ", make the power interval probability after merging can embody exert oneself " general character " of " majority " accumulator system, thus make the trial curve adopting this statistical method to obtain to be applicable to different capacity, lithium battery in the performance parameter accumulator systems such as capacity, improve the adaptability of test method of the present invention to different performance parameter accumulator system.
Step 103, calculates measured power and the test duration of real power in described power interval.
Wherein, using the average power of real power in described power interval as described measured power:
Wherein, α
ifor the probability of power segmentation each in power interval, power interval merges normalizing by the segmentation of i-th ~ k power;
P
ifor the intermediate value of power segmentation each in power interval, such as 1% ~ 5%P
npower in interval is 2.5%P
nor, described P
norfor specified charge-discharge electric power;
P
avefor the average power of real power in power interval.
The described test duration is:
Wherein, α
ifor the probability of power segmentation each in power interval;
T
norfor the accumulator system specified discharge and recharge time;
T is the test period of power interval.
Step 104, carries out the charging and discharging test of pre-determined number according to described measured power and test duration to energy-storage battery.
As one embodiment of the present of invention, according to following formulae discovery test efficiency for charge-discharge η, close with the efficiency for charge-discharge η in actual motion by regulating the measured power of discharge and recharge different phase in process of the test and test duration to ensure;
In formula: E
dis---the rechargeable energy of a circulation in test;
E
ch---the discharge energy of a circulation in test;
P
disiit is the measured power of i-th discharge range;
P
chiit is the measured power between i-th charging zone;
T
disiit is the test duration of i-th discharge range;
T
chiit is the test duration between i-th charging zone;
η is test efficiency for charge-discharge.
As one embodiment of the present of invention, in discharge test, if described energy-storage battery voltage reaches final discharging voltage lower limit, and cycle index does not reach described pre-determined number, then export defective result.
As one embodiment of the present of invention, in charging measurement, if after charging measurement terminates, when described energy-storage battery residual capacity is less than predetermined threshold, then export defective result at every turn.
By the embodiment of the invention described above, the test method of the service life cycle based on typical operating condition can be provided for energy-storage lithium battery group, inspection energy-storage lithium battery is following the tracks of the ageing of performance situation under plan generating, honourable power smooth, peak load shifting three kinds of operational modes, for the production of energy-storage lithium battery, operation, maintenance provide guidance, ensure lithium battery energy storage battery security of system, stable, run efficiently.
Be illustrated in figure 2 the particular flow sheet of a kind of energy storage battery test method of the embodiment of the present invention.
Comprise step 201, the rated power of energy-storage battery is divided into impartial n section, the probability that in record charging, discharge process, in each power segmentation, energy-storage battery real power (P) occurs, obtain charging real power probability graph as shown in Figure 3A, electric discharge real power probability graph as shown in Figure 3 B, lines in Fig. 3 A and Fig. 3 B represent the accumulated probability of charging and discharging power segmentation, namely each segmentation possibilities sum below certain charge or discharge power segmentation, is used for embodying the variation tendency of power segmentation possibilities.Wherein, power segmentation in the present embodiment can be 20 sections, P
chnfor specified charge power, P
disnfor nominal discharge power.
As in another embodiment, the rated power of energy-storage battery can also be divided into unequal n section, the 1%-7% of such as rated power is divided into one section, the 8%-17% of rated power is divided into one section, by that analogy, the probability that in record charging, discharge process, in each power segmentation, energy-storage battery real power (P) occurs.
Step 202, merges power segmentation and forms power interval.
According to the situation of real power probability distribution in power segmentation, power segmentation is merged, merging can use following principle: power segmentation close for real power probability between power segmentation merges by (a), or (b) is segmented into center with the power that real power probability is high, the power segmentation of both sides real power probability almost symmetry is merged.After M power interval is merged in the power segmentation of n decile, as shown in Figure 4 A, the actual discharge power probability figure after merging the segmentation of Fig. 3 B discharge power as shown in Figure 4 B for such as, actual charge power probability graph after merging the segmentation of Fig. 3 A charge power.
Wherein, as shown in Figure 4 A, 20 charge power segmentations can be merged into 1% ~ 10%, 11% ~ 40%, 41% ~ 60%, 61% ~ 90% 5 power interval; Wherein the real power probability of 1% ~ 5%, 6 ~ 10% power segmentations is close, and (a) can merge into 1% ~ 10% power interval on principle, and according to this principle, 91% ~ 100% power interval is merged in 91% ~ 95%, 96 ~ 100% power segmentations; 11% ~ 15%, 16% ~ 20%, 21% ~ 25%, 26% ~ 30%, 31% ~ 35%, 36% ~ 40% power segmentation is centered by 21% ~ 25%, 26% ~ 30%, (b) merges into 11% ~ 40% power interval on principle, and according to this principle, 41% ~ 60% power interval is merged in 41% ~ 45%, 46% ~ 50%, 51% ~ 55%, 56% ~ 60% power segmentation, 61% ~ 90% power interval is merged in 61% ~ 65%, 66% ~ 70%, 71% ~ 75%, 76% ~ 80%, 81% ~ 85%, 86% ~ 90% power segmentation.Adopt identical method in embodiment shown in Fig. 4 B, discharge power segmentation can be merged into 1% ~ 10%, 11% ~ 40%, 41% ~ 60%, 61% ~ 90% 5 power interval.
Step 203, calculates measured power and the test duration of real power in power interval after described merging.
Calculate the average real power of each power interval, as the measured power value of this power interval, average power is obtained by formula (1).Calculate the probability in different capacity interval and the product of the specified discharge and recharge time test period as this measured power value, test period is calculated by formula (2).
In formula: α
ifor the probability of power segmentation each in power interval, power interval simplifies normalizing by the segmentation of i-th ~ k power;
P
ifor the intermediate value of power segmentation each in power interval, such as 1% ~ 5%P
npower in interval is 2.5%P
nor, described P
norfor specified charge-discharge electric power.
P
avefor the average power of power interval.
In formula: α
ifor the probability of power segmentation each in power interval;
T
norfor the accumulator system specified discharge and recharge time;
T is the test period of power interval.
Step 204, tests energy-storage battery group to be measured according to measured power and test duration.
Specifically can see with the step of following table 1.
The test procedure of energy-storage battery group operating mode simulated by table 1
Because test needs carry out repeatedly charge and discharge cycles, for preventing occurring in cyclic test process that battery is full of or emptying causes testing the situation appearance stopped, want efficiency for charge-discharge in warranty test should be identical with the efficiency for charge-discharge η in actual motion, i.e. schematic diagram in the discharge and recharge test cycle of as shown in Figure 5, the rechargeable energy of test and discharge energy should meet formula (3).
In formula: E
dis---the rechargeable energy of a circulation in test;
E
ch---the discharge energy of a circulation in test;
P
disiit is the measured power of i-th discharge range;
P
chiit is the measured power between i-th charging zone;
T
disiit is the test duration of i-th discharge range;
T
chiit is the test duration between i-th charging zone;
η is test efficiency for charge-discharge.
As one embodiment of the present of invention, can by regulate the measured power in the different discharge and recharge stage (measured power when measured power when comprising charging and electric discharge) and test duration (test duration when comprising charging and discharge time test duration) make the efficiency for charge-discharge η of test identical with actual efficiency for charge-discharge η.
Step 205, according to the test figure of energy-storage battery to be measured, output test result.
A) in process of the test, energy-storage battery voltage reaches final discharging voltage lower limit, and cycle index does not reach 500 times, then output test result is defective;
B), after in process of the test, each cycle charging process terminates, energy-storage battery residual capacity is less than 80% of rated capacity, then output test result is defective;
C) cycle index reaches 500 times, and energy-storage battery voltage does not reach final discharging voltage, and after last charging process terminates, battery remaining power is greater than 80% of rated capacity, then output test result is qualified.
Below for 20kW × 2h energy-storage battery group, test method and the test procedure of typical operating condition simulated circulation test is described, the basic parameter of energy storage module is as shown in table 2.
Table 2 energy storage module basic parameter
(1) power distribution probability
The charge-discharge electric power of energy storage module is divided into 20 sections according to the number percent of rated power, and charge power segmentation situation is as shown in table 3, and discharge power segmentation situation is as shown in table 4.
Table 3 charge power segmentation possibilities
| Power segmentation (kW) | Power intermediate value (kW) | Segmentation possibilities (%) | Accumulated probability (%) |
| 0.2～1.0 | 0.5 | 0.5 | 0.5 |
| 1.2～2.0 | 1.5 | 0.5 | 1.0 |
| 2.2～3.0 | 2.5 | 5.0 | 6.0 |
| 3.2～4.0 | 3.5 | 4.5 | 10.5 |
| 4.2～5.0 | 4.5 | 8.0 | 18.5 |
| 5.2～6.0 | 5.5 | 7.0 | 25.5 |
| 6.2～7.0 | 6.5 | 6.0 | 31.5 |
| 7.2～8.0 | 7.5 | 5.5 | 37.0 |
| 8.2～9.0 | 8.5 | 2.0 | 39.0 |
| 9.2～10.0 | 9.5 | 7.5 | 46.5 |
| 10.2～11.0 | 10.5 | 7.0 | 53.5 |
| 11.2～12.0 | 11.5 | 2.5 | 56.0 |
| 12.2～13.0 | 12.5 | 5.0 | 61.0 |
| 13.2～14.0 | 13.5 | 6.0 | 67.0 |
| 14.2～15.0 | 14.5 | 8.0 | 75.0 |
| 15.2～16.0 | 15.5 | 9.0 | 84.0 |
| 16.2～17.0 | 16.5 | 7.0 | 91.0 |
| 17.2～18.0 | 17.5 | 6.5 | 97.5 |
| 18.2～19.0 | 18.5 | 1.5 | 99.0 |
| 19.2～20.0 | 19.5 | 1.0 | 100.0 |
Table 4 discharge power segmentation possibilities
| Power segmentation (kW) | Power intermediate value (kW) | Segmentation possibilities (%) | Accumulated probability (%) |
| 0.2～1.0 | 0.5 | 1.0 | 1.0 |
| 1.2～2.0 | 1.5 | 1.5 | 2.5 |
| 2.2～3.0 | 2.5 | 5.0 | 7.5 |
| 3.2～4.0 | 3.5 | 5.0 | 12.5 |
| 4.2～5.0 | 4.5 | 9.0 | 21.5 |
| 5.2～6.0 | 5.5 | 7.5 | 29.0 |
| 6.2～7.0 | 6.5 | 5.0 | 34.0 |
| 7.2～8.0 | 7.5 | 5.5 | 39.5 |
| 8.2～9.0 | 8.5 | 2.5 | 42.0 |
| 9.2～10.0 | 9.5 | 6.0 | 48.0 |
| 10.2～11.0 | 10.5 | 8.5 | 56.5 |
| 11.2～12.0 | 11.5 | 2.5 | 59.0 |
| 12.2～13.0 | 12.5 | 5.5 | 64.5 |
| 13.2～14.0 | 13.5 | 6.5 | 71.0 |
| 14.2～15.0 | 14.5 | 6.5 | 77.5 |
| 15.2～16.0 | 15.5 | 9.0 | 86.5 |
| 16.2～17.0 | 16.5 | 6.0 | 92.5 |
| 17.2～18.0 | 17.5 | 5.5 | 98.0 |
| 18.2～19.0 | 18.5 | 1.0 | 99.0 |
| 19.2～20.0 | 19.5 | 1.0 | 100.0 |
(2) power segmentation simplification and measured power, the calculating of test duration
According to the principle that power segmentation merges, the charge power of table 3 can be merged into 0.2 ~ 2.0kW, 2.2 ~ 8.0kW, 8.2 ~ 12.0kW, 12.2 ~ 18.0kW, 18.2 ~ 20.0kW, five power interval, measured power, the test duration in each charge power interval are as shown in table 5, and measured power, the test duration in the rear each interval of discharge power segmentation merging of table 4 are as shown in table 6.
The interval test parameter table of table 5 charge power
| Power interval (kW) | Measured power (kW) | Test duration (min) |
| 0.2～2.0 | 1.0 | 1.2 |
| 2.2～8.0 | 5.1 | 43.2 |
| 8.2～12.0 | 10.0 | 22.8 |
| 12.2～18.0 | 15.1 | 49.8 |
| 18.2～20.0 | 18.9 | 3.0 |
The interval test parameter table of table 6 discharge power
| Power interval (kW) | Measured power (kW) | Test duration (min) |
| 0.2～2.0 | 1.1 | 3.0 |
| 2.2～8.0 | 5.0 | 44.4 |
| 8.2～12.0 | 10.1 | 23.4 |
| 12.2～18.0 | 15.0 | 46.8 |
| 18.2～20.0 | 19.0 | 2.4 |
(3) test procedure
The test procedure of 20 × 2h energy-storage lithium battery module is as shown in table 7, and the test efficiency for charge-discharge of energy storage module is 96%.
Table 720 × 2h energy-storage lithium battery group typical case operating condition cyclic test step
| test procedure | content of the test |
| 1 | energy-storage lithium battery group is filled to 40kWh, and leaves standstill 12h in 25 ± 5 DEG C of environment. |
| 2 | with 1.1kW electric discharge 3min. |
| 3 | with 5.0kW electric discharge 44.4min. |
| 4 | with 10.1kW electric discharge 23.4min. |
| 5 | with 15.0kW electric discharge 46.8min. |
| 6 | with 19.0kW electric discharge 2.4min. |
| 7 | with 1.0kW charging 1.2min. |
| 8 | with 5.1kW charging 43.2min. |
| 9 | with 10.0kW charging 22.8min. |
| 10 | with 15.1kW charging 49.8min. |
| 11 | with 18.9kW charging 3.0min. |
| 12 | repeat step 2 ~ 11, until off-test. |
(4) experimental result is exported
Test reaches following condition, and test stops:
A) in process of the test, cell voltage reaches 2.65V, and output test result is defective;
B), after each cycle charging process terminates, battery remaining power is less than 32kWh, and output test result is defective;
C) cycle index reaches 500 energy-storage battery voltages and does not reach final discharging voltage, and after last charging process terminates, battery remaining power is greater than 80% of rated capacity, then output test result is qualified.
By the embodiment of the invention described above, the test method of the service life cycle based on typical operating condition can be provided for energy-storage lithium battery group, inspection energy-storage lithium battery is following the tracks of the ageing of performance situation under plan generating, honourable power smooth, peak load shifting three kinds of operational modes, for the production of energy-storage lithium battery, operation, maintenance provide guidance, ensure lithium battery energy storage battery security of system, stable, run efficiently.
Technician in the related art will recognize that, embodiments of the invention have many possible amendments and combination, although form is slightly different, still adopts identical fundamental mechanism and method.In order to the object explained, aforementioned description with reference to several specific embodiment.But above-mentioned illustrative discussion is not intended to exhaustive or limits the precise forms of inventing herein.Above, many modifications and variations are possible.Selected and described embodiment, in order to explain principle of the present invention and practical application thereof, in order to the amendment for application-specific, the distortion that enable those skilled in the art utilize the present invention and each embodiment best.
Claims (7)
1. an energy storage battery test method, is characterized in that comprising,
The probability of real power in each power segmentation of record energy-storage battery charging and discharging;
According to the real power probability in power segmentation, power interval is merged in described power segmentation;
Calculate measured power and the test duration of real power in described power interval;
According to described measured power and test duration, the charging and discharging test of pre-determined number is carried out to energy-storage battery;
The measured power and the test duration that calculate real power in described power interval comprise further, and in described power interval, the average power of real power is as described measured power:
Wherein, α
ifor the probability of power segmentation each in power interval;
P
ifor the intermediate value of power segmentation each in power interval;
P
avefor the average power of real power in power interval;
The described test duration is:
Wherein, α
ifor the probability of power segmentation each in power interval;
T
norfor the accumulator system specified discharge and recharge time;
T is the test period of power interval;
Further comprise in the charging and discharging test according to described measured power and test duration energy-storage battery being carried out to pre-determined number, according to following formulae discovery test efficiency for charge-discharge η, close with the efficiency for charge-discharge η in actual motion by regulating the measured power of discharge and recharge different phase in process of the test and test duration to ensure:
In formula: E
dis---the rechargeable energy of a circulation in test;
E
ch---the discharge energy of a circulation in test;
P
disiit is the measured power of i-th discharge range;
P
chiit is the measured power between i-th charging zone;
T
disiit is the test duration of i-th discharge range;
T
chiit is the test duration between i-th charging zone;
η is test efficiency for charge-discharge.
2. a kind of energy storage battery test method according to claim 1, is characterized in that, described power is segmented into, and is divided into n section according to rated power number percent, described n be more than or equal to 2 positive integer.
3. a kind of energy storage battery test method according to claim 1, is characterized in that, described power is segmented into, and is divided into n section according to rated power number percent, described n be more than or equal to 2 positive integer.
4. a kind of energy storage battery test method according to claim 1, it is characterized in that, comprise further power interval being merged in described power segmentation according to the real power probability in power segmentation, power segmentation close for real power probability in described power segmentation is merged.
5. a kind of energy storage battery test method according to claim 1, it is characterized in that, comprise further power interval being merged in described power segmentation according to the real power probability in power segmentation, be segmented into center with the power that real power probability is high, the power segmentation of both sides real power probability almost symmetry is merged.
6. a kind of energy storage battery test method according to claim 1, it is characterized in that, further comprise after the charging and discharging test according to described measured power and test duration energy-storage battery being carried out to pre-determined number, in discharge test, if described energy-storage battery voltage reaches final discharging voltage lower limit, and cycle index does not reach described pre-determined number, then export defective result.
7. a kind of energy storage battery test method according to claim 1, it is characterized in that, further comprise after the charging and discharging test according to described measured power and test duration energy-storage battery being carried out to pre-determined number, in charging measurement, if after each charging measurement terminates, when described energy-storage battery residual capacity is less than predetermined threshold, then export defective result.
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