CN108152747A - The detection method and device of accumulator capacity - Google Patents

The detection method and device of accumulator capacity Download PDF

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Publication number
CN108152747A
CN108152747A CN201711336943.1A CN201711336943A CN108152747A CN 108152747 A CN108152747 A CN 108152747A CN 201711336943 A CN201711336943 A CN 201711336943A CN 108152747 A CN108152747 A CN 108152747A
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China
Prior art keywords
accumulator
discharge
current
capacity
parameter
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Chinese (zh)
Inventor
苏素平
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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Priority to CN201711336943.1A priority Critical patent/CN108152747A/en
Publication of CN108152747A publication Critical patent/CN108152747A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644Constructional arrangements
    • G01R31/3648Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm

Abstract

The embodiment of the invention discloses a kind of detection method and device of accumulator capacity.This method includes:Obtain the measured value of battery discharging parameter of the wind power generating set in using storage battery power supply pitch process;According to the measured value of acquisition and the functional relation built by accumulator experiment using discharge parameter, accumulator current capacities are detected.The detection method and device of the accumulator capacity of the embodiment of the present invention can be detected the capacity of accumulator used in wind power generating set, can ensure the safe variable pitch of wind power generating set.

Description

The detection method and device of accumulator capacity
Technical field
The present invention relates to technical field of wind power generation more particularly to a kind of detection method and device of accumulator capacity.
Background technology
At present, wind turbine control system generally uses uninterruptible power supply (Uninterruptible Power Supply, referred to as UPS) as backup power supply.When power grid breaks down, powered by UPS to control loop, ensure wind-force hair Motor group controller normal operation, safe variable pitch.
UPS is mostly using accumulator as power supply.If accumulator capacity deficiency can lead to wind power generating set urgent In the case of can not variable pitch, wind power generating set driving can be caused when serious.It is therefore desirable to be detected to accumulator capacity, with Ensure safe wind generating set pitch control.
Invention content
The embodiment of the present invention provides a kind of detection method and device of accumulator capacity, and wind power generating set can be made The capacity of accumulator is detected, and can ensure the safe variable pitch of wind power generating set.
On the one hand, an embodiment of the present invention provides a kind of detection method of accumulator capacity, method includes:
Obtain the measured value of battery discharging parameter of the wind power generating set in using storage battery power supply pitch process;
According to the measured value of acquisition and the functional relation built by accumulator experiment using discharge parameter, electric power storage is detected Pond current capacities.
In one embodiment of the invention, discharge parameter includes:Instantaneous discharge voltage and the instantaneous discharge electricity of accumulator Stream;
According to the measured value of acquisition and the functional relation built by accumulator experiment using discharge parameter, electric power storage is detected Pond current capacities, including:
According to instantaneous discharge voltage and instant discharge current, the current internal resistance of calculating accumulator;
According to the internal resistance being calculated and the accumulator internal resistance and storage that are built by accumulator experiment using discharge parameter The functional relation of battery capacity determines accumulator current capacities.
In one embodiment of the invention, discharge parameter includes:Instantaneous discharge voltage and the instantaneous discharge electricity of accumulator Stream;
According to the measured value of acquisition and the functional relation built by accumulator experiment using discharge parameter, electric power storage is detected Pond current capacities, including:
According to instantaneous discharge voltage and instant discharge current, the current internal resistance of calculating accumulator;
According to the internal resistance being calculated and the accumulator internal resistance and storage that are built by accumulator experiment using discharge parameter The functional relation of cell degradation rate determines the ageing rate of accumulator;
According to ageing rate, accumulator current capacities are determined.
In one embodiment of the invention, discharge parameter includes:The instantaneous discharge voltage and discharge capacity of accumulator;
According to the measured value of acquisition and the functional relation built by accumulator experiment using discharge parameter, electric power storage is detected Pond current capacities, including:
According to instantaneous discharge voltage and discharge capacity, ampere-hour pressure drop ratio is calculated, wherein, ampere-hour pressure drop ratio is put for accumulator The ratio of the voltage difference of the open-circuit voltage and discharge voltage of electricity and accumulator;
According to the ampere-hour pressure drop ratio being calculated and by accumulator experiment obtain ampere-hour pressure drop ratio and accumulator it is old The functional relation of rate determines the ageing rate of accumulator;
According to ageing rate, accumulator current capacities are determined.
In one embodiment of the invention, method further includes:
According to current capacities, determine whether accumulator needs replacing;
If it is determined that accumulator needs replacing, the prompt message of accumulator is needed replacing to user's displaying.
In one embodiment of the invention, method further includes:
The discharge capacity of each variable pitch, determines electric power storage in the case of not charged again according to current capacities and accumulator The current remaining capacity in pond.
On the other hand, an embodiment of the present invention provides a kind of detection device of accumulator capacity, device includes:
Acquisition module is joined for obtaining battery discharging of the wind power generating set in using storage battery power supply pitch process Several measured values;
Detection module, the function built for the measured value according to acquisition and by accumulator experiment using discharge parameter Relationship detects accumulator current capacities.
In one embodiment of the invention, discharge parameter includes:Instantaneous discharge voltage and the instantaneous discharge electricity of accumulator Stream;
Detection module is specifically used for:
According to instantaneous discharge voltage and instant discharge current, the current internal resistance of calculating accumulator;
According to the internal resistance being calculated and the accumulator internal resistance and storage that are built by accumulator experiment using discharge parameter The functional relation of battery capacity determines accumulator current capacities.
In one embodiment of the invention, discharge parameter includes:Instantaneous discharge voltage and the instantaneous discharge electricity of accumulator Stream;
Detection module is specifically used for:
According to instantaneous discharge voltage and instant discharge current, the current internal resistance of calculating accumulator;
According to the internal resistance being calculated and the accumulator internal resistance and storage that are built by accumulator experiment using discharge parameter The functional relation of cell degradation rate determines the ageing rate of accumulator;
According to ageing rate, accumulator current capacities are determined.
In one embodiment of the invention, discharge parameter includes:The instantaneous discharge voltage and discharge capacity of accumulator;
Detection module is specifically used for:
According to instantaneous discharge voltage and discharge capacity, ampere-hour pressure drop ratio is calculated, wherein, ampere-hour pressure drop ratio is put for accumulator The ratio of the voltage difference of the open-circuit voltage and discharge voltage of electricity and accumulator;
According to the ampere-hour pressure drop ratio being calculated and by accumulator experiment obtain ampere-hour pressure drop ratio and accumulator it is old The functional relation of rate determines the ageing rate of accumulator;
According to ageing rate, accumulator current capacities are determined.
In one embodiment of the invention, device further includes:
First determining module, for according to current capacities, determining whether accumulator needs replacing;
Reminding module, for if it is determined that accumulator needs replacing, the prompt message of accumulator to be needed replacing to user's displaying.
In one embodiment of the invention, device further includes:
Second determining module, for not charged again according to current capacities and accumulator in the case of each variable pitch Discharge capacity, determine the current remaining capacity of accumulator.
The detection method and device of the accumulator capacity of the embodiment of the present invention, can be to storage used in wind power generating set The capacity of battery is detected, and can ensure the safe variable pitch of wind power generating set.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, it will make below to required in the embodiment of the present invention Attached drawing is briefly described, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to these attached drawings.
Fig. 1 shows the first flow diagram of the detection method of accumulator capacity provided in an embodiment of the present invention;
Fig. 2 shows the circuit diagrams of accumulator test principle provided in an embodiment of the present invention;
Fig. 3 shows second of flow diagram of the detection method of accumulator capacity provided in an embodiment of the present invention;
Fig. 4 shows the third flow diagram of the detection method of accumulator capacity provided in an embodiment of the present invention;
Fig. 5 shows the first structure diagram of the detection device of accumulator capacity provided in an embodiment of the present invention;
Fig. 6 shows second of structure diagram of the detection device of accumulator capacity provided in an embodiment of the present invention;
Fig. 7 shows the third structure diagram of the detection device of accumulator capacity provided in an embodiment of the present invention.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make the mesh of the present invention , technical solution and advantage be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is further retouched in detail It states.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting the present invention. To those skilled in the art, the present invention can be real in the case of some details in not needing to these details It applies.The description of embodiment is used for the purpose of by showing that the example of the present invention is better understood from the present invention to provide below.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any this practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including Also there are other identical elements in the process of the element, method, article or equipment.
As shown in Figure 1, Fig. 1 shows the first flow of the detection method of accumulator capacity provided in an embodiment of the present invention Schematic diagram.The detection method of accumulator capacity can include:
S101:Obtain the measurement of battery discharging parameter of the wind power generating set in using storage battery power supply pitch process Value.
Wherein, discharge parameter includes:The instantaneous discharge voltage of accumulator, instant discharge current and one kind in discharge capacity or Several combinations.
S102:According to the measured value of acquisition and the functional relation built by accumulator experiment using discharge parameter, inspection Survey accumulator current capacities.
It is understood that accumulator current capacities are electricity of the accumulator in the case of fully charged.
It is understood that in the measured value according to acquisition and the letter built by accumulator experiment using discharge parameter Number relationship before detecting accumulator current capacities, needs to utilize discharge parameter constructor relationship by accumulator experiment.
Further it will be understood that accumulator tests the accumulator that utilized accumulator is used with wind power generating set Attribute it is identical, which includes:Brand, production batch and model.That is, accumulator test utilized accumulator with The accumulator that wind power generating set uses, the brand of the two is identical, production batch is also identical and model is also identical.This is because Degradation is carried out according to the accumulator for not meeting above-mentioned condition, obtained result can not accurately reflect wind-driven generator The truth of the accumulator of measurement capacity is needed in group.
It is understood that the accumulator experiment of the embodiment of the present invention refers to accumulator degradation.
Fig. 2 shows the circuit diagrams of accumulator test principle provided in an embodiment of the present invention.The circuit includes:Charging Power supply 1, accumulator 2, accumulator internal resistance 3, voltage sensor 4, current sensor 5, first contactor 6, second contactor 7 and work( Rate resistance 8.
It is as follows using discharge parameter constructor relationship step by accumulator experiment:
(1) first contactor 6 is closed, disconnects second contactor 7, charge power supply 1 charges to accumulator 2.Work as voltage When the voltage that sensor 4 detects continues not change whithin a period of time, accumulator 2 is fully charged.
(2) first contactor 6 is disconnected, voltage sensor 4 detects the open-circuit voltage Uk of accumulator.
(3) it is closed 7 preset duration of second contactor and carries out battery discharging, in the mistake for being closed the second 7 preset durations of contact In journey sometime, voltage sensor 4 detects voltage Ud, the 5 measure loop electric current I of current sensor at 8 both ends of power resistor, Internal resistance is calculated equal to (Uk-Ud)/I;The discharge capacity this time to be discharged is integrated to the electric current in preset duration again.
(4) circulation step (2) and (3), until battery discharging finishes, wherein, voltage sensor when battery discharging finishes The voltage at 8 both ends of power resistor that device 4 detects is equal to a certain voltage value U0, when battery discharging finishes, the remaining electricity of accumulator Amount is zero.
(5) discharge capacity being calculated every time is added to obtain accumulator this appearance in the case of fully charged Amount.
Internal resistance be calculated will be averaging to obtain internal resistance average value every time, using the internal resistance average value as accumulator this The corresponding internal resistance of capacity in the case of fully charged.
Calculating accumulator this it is fully charged carry out discharging again corresponding ampere-hour pressure drop ratio equal to accumulator this full of Capacity/(Uk-U0) in the case of electricity.Wherein, ampere-hour pressure drop ratio for accumulator discharge capacity and accumulator open-circuit voltage and The ratio of the voltage difference of discharge voltage.
Under normal conditions, when accumulator current capacities are the 50% of accumulator initial capacity, it is believed that accumulator is very Aging, accumulator ageing rate is 100% at this time.According to accumulator ageing rate=accumulator initial capacity/accumulator current capacities- 1, the current corresponding ageing rate of calculating accumulator.
(6) step (1) to (5) is repeated, obtains the data after repeatedly cycle, until accumulator aging, more according to what is obtained Data after secondary cycle build functional relation, accumulator internal resistance and the accumulator ageing rate of accumulator internal resistance and accumulator capacity Functional relation and ampere-hour pressure drop ratio and accumulator ageing rate functional relation.
In one embodiment of the invention, least square method can be used, determine above-mentioned functional relation.
Wherein, least square method is also known as least squares method, it is a kind of mathematical optimization techniques.It is by minimizing error Quadratic sum finds the optimal function matching of data.Unknown data can be easily acquired, and cause this using least square method The quadratic sum of error is minimum between the data and real data that acquire a bit.In addition, the main application of least square method one is just It is curve matching.Wherein, curve matching refers to select appropriate curve type to be fitted observation data, and with the curve side of fitting Journey analyzes the relationship between two variables.In simple terms, curve matching is to seek a curve, makes data point in the top from this curve Or lower section is nearby, required curve is known as matched curve, it can reflect the overall distribution of data and part occurs Larger fluctuation can more reflect the characteristic of approximated function, make the approximating function acquired and known function on the whole for Its deviation reaches minimum by some way measurement.Curve matching does not require all known points of curve negotiating, it is required that obtain Approximate function can reflect the fundamental relation of data.By least square method, the functional relation between two variables can be obtained.It can The functional relation and peace of the functional relation of acquisition accumulator internal resistance and accumulator capacity, accumulator internal resistance and accumulator ageing rate When pressure drop ratio and accumulator ageing rate functional relation.
Illustratively, by taking accumulator used in wind power generating set as an example, production identical with the accumulator brand is selected The accumulator that batch is identical and model is identical first carries out accumulator experiment.Data such as 1 institute of table obtained by above-mentioned multiple cycle Show.
Table 1
Capacity (unit:Ampere-hour) Internal resistance (unit:Milliohm) Ageing rate Ampere-hour pressure drop ratio
7.2 21 0 5.143
7.19 21.2 0.001 5.136
7.15 21.3 0.007 5.107
7.11 21.5 0.013 5.079
7.04 21.7 0.023 5.029
6.99 21.7 0.03 4.9929
6.81 21.9 0.057 4.864
6.5 22.5 0.108 4.643
5.9 23.6 0.22 4.214
5.5 25.4 0.309 3.929
5 27.3 0.44 3.571
4.5 29.9 0.6 3.214
4 32.6 0.8 2.857
3.6 35 1 2.571
As can be seen from Table 1, the initial capacity of accumulator is 7.2 ampere-hours (Ah)), initial internal resistance is 21 milliohms (m Ω).
In one embodiment of the invention, the data shown in table 1 can be drawn in a coordinate system, by coordinate The observation of data point determines the distribution situation of data point in system, and then appropriate curve type is selected to carry out curve fitting, and passes through Least square method builds the letter of the functional relation of accumulator internal resistance and accumulator capacity, accumulator internal resistance and accumulator ageing rate Number relationship and ampere-hour pressure drop ratio and the functional relation of accumulator ageing rate.
The accumulator internal resistance of structure and the functional relation of accumulator capacity are as follows:
Y=21.69956e-0.05284x (1)
Wherein, y is accumulator capacity in formula (1), and x is accumulator internal resistance.
The accumulator internal resistance of structure and the functional relation of accumulator ageing rate are as follows:
Y=-1.49815+0.07092x (2)
Wherein, y is accumulator ageing rate in formula (2), and x is accumulator internal resistance.
The ampere-hour pressure drop ratio and the functional relation of accumulator ageing rate of structure are as follows:
Y=0.09819x2-1.13678x+3.25608 (3)
Wherein, y is accumulator ageing rate in formula (3), and x is ampere-hour pressure drop ratio.
In one embodiment of the invention, the discharge parameter of acquisition includes:The instantaneous discharge voltage of accumulator and instantaneous Discharge current.The embodiment of the present invention utilizes the letter of discharge parameter structure according to the measured value of acquisition and by accumulator experiment Number relationship, detects accumulator current capacities, can include:According to instantaneous discharge voltage and instant discharge current, calculating accumulator Current internal resistance;According to the internal resistance being calculated and by accumulator experiment using discharge parameter build accumulator internal resistance with The functional relation of accumulator capacity determines accumulator current capacities.
Illustratively, it is assumed that the open-circuit voltage of the accumulator of acquisition is:12.2 volts (V), instantaneous discharge voltage are 11.5V, Instant discharge current is 25.93 amperes (A).
Calculate accumulator internal resistance=(12.2-11.5)/25.93=27 milliohms.
Accumulator current capacities are calculated as 5.2 ampere-hours according to above-mentioned formula (1).
In one embodiment of the invention, the discharge parameter of acquisition includes:The instantaneous discharge voltage of accumulator and instantaneous Discharge current.The embodiment of the present invention utilizes the letter of discharge parameter structure according to the measured value of acquisition and by accumulator experiment Number relationship, detects accumulator current capacities, can include:According to instantaneous discharge voltage and instant discharge current, calculating accumulator Current internal resistance;According to the internal resistance being calculated and by accumulator experiment using discharge parameter build accumulator internal resistance with The functional relation of accumulator ageing rate determines the ageing rate of accumulator;According to ageing rate, accumulator current capacities are determined.
Illustratively, it is assumed that the open-circuit voltage of the accumulator of acquisition is:12.2 volts (V), instantaneous discharge voltage are 11.5V, Instant discharge current is 25.93 amperes (A).
Calculate accumulator internal resistance=(12.2-11.5)/25.93=27 milliohms.
It is 0.417 to calculate accumulator ageing rate according to above-mentioned formula (2).
And then calculate accumulator current capacities=7.2/ (1+0.417)=5.08 ampere-hour.
In one embodiment of the invention, the discharge parameter of acquisition includes:It the instantaneous discharge voltage of accumulator and puts Electricity.The embodiment of the present invention is closed according to the measured value of acquisition and by accumulator experiment using the function that discharge parameter is built System detects accumulator current capacities, can include:According to instantaneous discharge voltage and discharge capacity, ampere-hour pressure drop ratio is calculated, In, ampere-hour pressure drop ratio is the discharge capacity of accumulator and the ratio of the voltage difference of the open-circuit voltage and discharge voltage of accumulator;According to The ampere-hour pressure drop ratio being calculated and the ampere-hour pressure drop ratio and the function of accumulator ageing rate that are obtained by accumulator experiment close System determines the ageing rate of accumulator;According to ageing rate, accumulator current capacities are determined.
It in one embodiment of the invention, can be to the electric current in preset duration in the discharge capacity for obtaining accumulator It is integrated to obtain discharge capacity.
Illustratively, it is assumed that the open-circuit voltage of the accumulator of acquisition is:12.2 volts (V), instantaneous discharge voltage are 11.5V, Discharge capacity is 3 ampere-hours.
Calculate ampere-hour pressure drop ratio=3 (12.2-11.5)=4.28.
It is 0.18 to calculate accumulator ageing rate according to above-mentioned formula (3).
And then calculate accumulator current capacities=7.2/ (1+0.18)=6.1 ampere-hour.
It should be noted that the above-mentioned data instance in table 1 illustrates, an only specific example of the invention, and Do not form limitation of the invention.It should be understood that in practical applications, different brands, different production batch, different model Data corresponding to accumulator are different, and then the accumulator internal resistance built is different from the functional relation of accumulator capacity, structure Accumulator internal resistance and the functional relation of accumulator ageing rate also differ, the ampere-hour pressure drop ratio of structure and the letter of accumulator ageing rate Number relationship also differs.
The detection method of the accumulator capacity of the embodiment of the present invention, can be to accumulator used in wind power generating set Capacity is detected, and can ensure the safe variable pitch of wind power generating set.
Fig. 3 shows second of flow diagram of the detection method of accumulator capacity provided in an embodiment of the present invention.This Increase on the basis of invention embodiment illustrated in fig. 3 embodiment shown in Fig. 1:
S103:According to current capacities, determine whether accumulator needs replacing.
S104:If it is determined that accumulator needs replacing, the prompt message of accumulator is needed replacing to user's displaying.
Under normal conditions, when accumulator capacity falls to the 80% of initial capacity, accumulator just needs to be replaced.
It is assumed that the initial capacity of accumulator is 7.2 ampere-hours, accumulator current capacities are 5.08 ampere-hours.Accumulator it is initial The 80% of 7.2 ampere-hour of capacity is 5.76 ampere-hours.
And 5.08 ampere-hours<5.76 ampere-hours determine that accumulator is replaced, and then are needed replacing to user's displaying at this time The prompt message of accumulator, so that user replaces accumulator.
The detection method of the accumulator capacity of the embodiment of the present invention, can determine whether accumulator needs replacing.In electric power storage When pond needs replacing, the prompt message for needing replacing accumulator can be shown to user, so that user replaces accumulator.
Fig. 4 shows the third flow diagram of the detection method of accumulator capacity provided in an embodiment of the present invention.This Increase on the basis of invention embodiment illustrated in fig. 4 embodiment shown in Fig. 1:
S105:The electric discharge of each variable pitch in the case of not charged again according to accumulator current capacities and accumulator Amount, determines the current remaining capacity of accumulator.
Illustratively, it is assumed that accumulator current capacities are 7.2 ampere-hours, and accumulator becomes in the case where not charged again Paddle discharges 3 times, wherein, first time discharge capacity is 0.5 ampere-hour, and second of discharge capacity is 0.4 ampere-hour, and third time discharge capacity is 0.6 Ampere-hour.Then the current remaining capacity of accumulator is 5.7 ampere-hours.
The detection method of the accumulator capacity of the embodiment of the present invention can determine the remaining capacity of accumulator, and then can User is made to determine the need for charging to accumulator.
Corresponding with above-mentioned embodiment of the method, the embodiment of the present invention also provides a kind of detection device of accumulator capacity.
As shown in figure 5, Fig. 5 shows the first structure of the detection device of accumulator capacity provided in an embodiment of the present invention Schematic diagram.The detection device of accumulator capacity can include:
Acquisition module 501 is put for obtaining wind power generating set using the accumulator in storage battery power supply pitch process The measured value of electrical parameter.
Detection module 502 is built for the measured value according to acquisition and by accumulator experiment using discharge parameter Functional relation detects accumulator current capacities.
In one embodiment of the invention, discharge parameter can include:It the instantaneous discharge voltage of accumulator and instantaneously puts Electric current.
The detection module 502 of the embodiment of the present invention, specifically can be used for:
According to instantaneous discharge voltage and instant discharge current, the current internal resistance of calculating accumulator;
According to the internal resistance being calculated and the accumulator internal resistance and storage that are built by accumulator experiment using discharge parameter The functional relation of battery capacity determines accumulator current capacities.
In one embodiment of the invention, discharge parameter can include:It the instantaneous discharge voltage of accumulator and instantaneously puts Electric current.
The detection module 502 of the embodiment of the present invention, specifically can be used for:
According to instantaneous discharge voltage and instant discharge current, the current internal resistance of calculating accumulator;
According to the internal resistance being calculated and the accumulator internal resistance and storage that are built by accumulator experiment using discharge parameter The functional relation of cell degradation rate determines the ageing rate of accumulator;
According to ageing rate, accumulator current capacities are determined.
In one embodiment of the invention, discharge parameter can include:The instantaneous discharge voltage of accumulator and electric discharge Amount.
The detection module 502 of the embodiment of the present invention, specifically can be used for:
According to instantaneous discharge voltage and discharge capacity, ampere-hour pressure drop ratio is calculated, wherein, ampere-hour pressure drop ratio is put for accumulator The ratio of the voltage difference of the open-circuit voltage and discharge voltage of electricity and accumulator;
According to the ampere-hour pressure drop ratio being calculated and by accumulator experiment obtain ampere-hour pressure drop ratio and accumulator it is old The functional relation of rate determines the ageing rate of accumulator;
According to ageing rate, accumulator current capacities are determined.
The detection device of the accumulator capacity of the embodiment of the present invention, can be to accumulator used in wind power generating set Capacity is detected, and can ensure the safe variable pitch of wind power generating set.
Fig. 6 shows second of structure diagram of the detection device of accumulator capacity provided in an embodiment of the present invention.This On the basis of invention embodiment illustrated in fig. 6 embodiment shown in Fig. 5, increase the first determining module 503 and reminding module 504.Its In,
First determining module 503, for according to accumulator current capacities, determining whether accumulator needs replacing;
Reminding module 504, for if it is determined that accumulator needs replacing, the prompting that accumulator is needed replacing to user's displaying to be believed Breath.
Fig. 7 shows the third structure diagram of the detection device of accumulator capacity provided in an embodiment of the present invention.This On the basis of invention embodiment illustrated in fig. 7 embodiment shown in Fig. 5, increase by the second determining module 505, for working as according to accumulator The discharge capacity of preceding capacity and accumulator each variable pitch in the case of not charged again determines the current residue electricity of accumulator Amount.
It should be clear that the invention is not limited in specific configuration described above and shown in figure and processing. For brevity, it is omitted here the detailed description to known method.In the above-described embodiments, several tools have been described and illustrated The step of body, is as example.But procedure of the invention is not limited to described and illustrated specific steps, this field Technical staff can be variously modified, modification and addition or suitable between changing the step after the spirit for understanding the present invention Sequence.
Structures described above frame functional block shown in figure can be implemented as hardware, software, firmware or their group It closes.When realizing in hardware, it may, for example, be electronic circuit, application-specific integrated circuit (ASIC), appropriate firmware, insert Part, function card etc..When being realized with software mode, element of the invention is used to perform program or the generation of required task Code section.Either code segment can be stored in machine readable media program or the data-signal by being carried in carrier wave is passing Defeated medium or communication links are sent." machine readable media " can include being capable of any medium of storage or transmission information. The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), soft Disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can be via such as internet, inline The computer network of net etc. is downloaded.
It should also be noted that, the exemplary embodiment referred in the present invention, is retouched based on a series of step or device State certain methods or system.But the present invention is not limited to the sequence of above-mentioned steps, that is to say, that can be according in embodiment The sequence referred to performs step, may also be distinct from that the sequence in embodiment or several steps are performed simultaneously.
The above description is merely a specific embodiment, it is apparent to those skilled in the art that, For convenience of description and succinctly, the specific work process of the system of foregoing description, module and unit can refer to preceding method Corresponding process in embodiment, details are not described herein.It should be understood that protection scope of the present invention is not limited thereto, it is any to be familiar with Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions, These modifications or substitutions should be covered by the protection scope of the present invention.

Claims (10)

1. a kind of detection method of accumulator capacity, which is characterized in that the method includes:
Obtain the measured value of battery discharging parameter of the wind power generating set in using storage battery power supply pitch process;
The functional relation built using the discharge parameter is tested according to the measured value and by accumulator, detects the storage Battery current capacities.
2. according to the method described in claim 1, it is characterized in that,
The discharge parameter includes:The instantaneous discharge voltage and instant discharge current of the accumulator;
It is described to test the functional relation built using the discharge parameter, inspection according to the measured value and by accumulator The accumulator current capacities are surveyed, including:
According to the instantaneous discharge voltage and the instant discharge current, the current internal resistance of the accumulator is calculated;
The accumulator internal resistance and storage that are built using the discharge parameter are tested according to the internal resistance being calculated and by accumulator The functional relation of battery capacity determines the accumulator current capacities.
3. according to the method described in claim 1, it is characterized in that,
The discharge parameter includes:The instantaneous discharge voltage and instant discharge current of the accumulator;
It is described to test the functional relation built using the discharge parameter, inspection according to the measured value and by accumulator The accumulator current capacities are surveyed, including:
According to the instantaneous discharge voltage and the instant discharge current, the current internal resistance of the accumulator is calculated;
The accumulator internal resistance and storage that are built using the discharge parameter are tested according to the internal resistance being calculated and by accumulator The functional relation of cell degradation rate determines the ageing rate of the accumulator;
According to the ageing rate, the accumulator current capacities are determined.
4. according to the method described in claim 1, it is characterized in that,
The discharge parameter includes:The instantaneous discharge voltage and discharge capacity of the accumulator;
It is described to test the functional relation built using the discharge parameter, inspection according to the measured value and by accumulator The accumulator current capacities are surveyed, including:
According to the instantaneous discharge voltage and the discharge capacity, ampere-hour pressure drop ratio is calculated, wherein, ampere-hour pressure drop ratio is accumulator Discharge capacity and accumulator open-circuit voltage and discharge voltage voltage difference ratio;
The ampere-hour pressure drop built using the discharge parameter is tested according to the ampere-hour pressure drop ratio being calculated and by accumulator Than the functional relation with accumulator ageing rate, the ageing rate of the accumulator is determined;
According to the ageing rate, the accumulator current capacities are determined.
5. according to the method described in claim 1, it is characterized in that, the method further includes:
The discharge capacity of each variable pitch in the case of not charged again according to the current capacities and the accumulator determines The current remaining capacity of the accumulator.
6. a kind of detection device of accumulator capacity, which is characterized in that described device includes:
Acquisition module, for obtaining battery discharging parameter of the wind power generating set in using storage battery power supply pitch process Measured value;
Detection module, for testing the function pass built using the discharge parameter according to the measured value and by accumulator System, detects the accumulator current capacities.
7. device according to claim 6, which is characterized in that
The discharge parameter includes:The instantaneous discharge voltage and instant discharge current of the accumulator;
The detection module, is specifically used for:
According to the instantaneous discharge voltage and the instant discharge current, the current internal resistance of the accumulator is calculated;
The accumulator internal resistance and storage that are built using the discharge parameter are tested according to the internal resistance being calculated and by accumulator The functional relation of battery capacity determines the accumulator current capacities.
8. device according to claim 6, which is characterized in that
The discharge parameter includes:The instantaneous discharge voltage and instant discharge current of the accumulator;
The detection module, is specifically used for:
According to the instantaneous discharge voltage and the instant discharge current, the current internal resistance of the accumulator is calculated;
The accumulator internal resistance and storage that are built using the discharge parameter are tested according to the internal resistance being calculated and by accumulator The functional relation of cell degradation rate determines the ageing rate of the accumulator;
According to the ageing rate, the accumulator current capacities are determined.
9. device according to claim 6, which is characterized in that
The discharge parameter includes:The instantaneous discharge voltage and discharge capacity of the accumulator;
The detection module, is specifically used for:
According to the instantaneous discharge voltage and the discharge capacity, ampere-hour pressure drop ratio is calculated, wherein, ampere-hour pressure drop ratio is accumulator Discharge capacity and accumulator open-circuit voltage and discharge voltage voltage difference ratio;
The ampere-hour pressure drop built using the discharge parameter is tested according to the ampere-hour pressure drop ratio being calculated and by accumulator Than the functional relation with accumulator ageing rate, the ageing rate of the accumulator is determined;
According to the ageing rate, the accumulator current capacities are determined.
10. device according to claim 6, which is characterized in that described device further includes:
Second determining module, for not charged again according to the current capacities and the accumulator in the case of every time The discharge capacity of variable pitch determines the current remaining capacity of the accumulator.
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