CN110082688B - A kind of method for testing performance and device of fuel cell - Google Patents
A kind of method for testing performance and device of fuel cell Download PDFInfo
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- CN110082688B CN110082688B CN201910556417.9A CN201910556417A CN110082688B CN 110082688 B CN110082688 B CN 110082688B CN 201910556417 A CN201910556417 A CN 201910556417A CN 110082688 B CN110082688 B CN 110082688B
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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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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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
Abstract
Under steady state operating conditions whether the invention discloses a kind of method for testing performance of fuel cell, comprising: when detecting that fuel cell enters power generation mode, judge the fuel cell；If so, determining average voltage level corresponding with each target current sampled point and acquisition target voltage values corresponding with each target current sampled point；For each target current sampled point, judge whether the difference of corresponding average voltage level and target voltage values is greater than preset first difference value threshold value；When the ratio for being greater than the total quantity of quantity and each target current sampled point of preset first difference value threshold value is greater than preset first proportion threshold value, determine that the fuel battery performance is unsatisfactory for requiring.The above process provides a kind of method for testing performance of fuel cell, does not need additionally to increase detection device in the detection process, so that it may realize the detection to fuel battery performance.
Description
Technical field
The present invention relates to field of fuel cell technology more particularly to the method for testing performance and device of a kind of fuel cell.
Background technique
Fuel cell is a kind of chemical devices for chemical energy possessed by fuel being directly changed into electric energy, also known as electrochemistry
Electric organ.Fuel cell has been applied to the industries such as auto industry, energy power generation, shipping industry, aerospace, domestic power supply.
By taking fuel battery engine system as an example, the performance of fuel cell is a key index, during actual use
Fuel cell powered is worked mostly in several operating conditions, therefore is required steady-state performance relatively high.When there are agings etc. for fuel cell
When situation, efficiency be can decrease, and fuel battery engines system can be reduced necessarily, influence customer perception even life peace
Entirely.
Lack a kind of method for detecting fuel battery performance, when the decline of fuel battery engines steady-state performance, is mentioned
Show.
Summary of the invention
In view of this, the present invention provides the method for testing performance and device of a kind of fuel cell, for solving because lacking inspection
The method for testing performance of fuel cell is surveyed, caused system performance reduces, influences the problem of customer perception or even life security, tool
Body scheme is as follows:
A kind of method for testing performance of fuel cell, comprising:
When detecting that fuel cell enters power generation mode, judge the fuel cell whether under steady state operating conditions；
If so, determining average voltage level corresponding with each target current sampled point and obtaining and each target current
The corresponding target voltage values of sampled point；
For each target current sampled point, judge that the difference of corresponding average voltage level and target voltage values is
It is no to be greater than preset first difference value threshold value；
When the ratio of the total quantity for the quantity and each target current sampled point for being greater than preset first difference value threshold value
When value is greater than preset first proportion threshold value, determine that the fuel battery performance is unsatisfactory for requiring.
Above-mentioned method, optionally, further includes:
When the ratio of the total quantity for the quantity and each target current sampled point for being greater than preset first difference value threshold value
When value is less than preset first proportion threshold value, determine that the fuel battery performance is met the requirements.
Whether above-mentioned method optionally when detecting that fuel cell enters power generation mode, judges the fuel cell
Under steady state operating conditions, comprising:
Whether the demand power for detecting the fuel cell fluctuates in preset first range；
Whether the changes in flow rate for detecting the air road of the fuel cell fluctuates in preset second range；
Whether the changes in flow rate for detecting the hydrogen road of the fuel cell fluctuates within the scope of preset third；
Whether the curent change for detecting each target current sampled point of the fuel cell is presetting wave in the 4th range
It is dynamic.
Above-mentioned method, optionally, determining average voltage level corresponding with each target current sampled point simultaneously obtain
Target voltage values corresponding with each target current sampled point, comprising:
For each current sample point, average voltage level is determined according to corresponding each single point voltage value；
Each single point voltage value is compared with corresponding average voltage level, the difference of the two is greater than preset the
The single point voltage value of two discrepancy thresholds is given up；
Quantity and each single point voltage for each current sample point, when the single point voltage value that do not give up wherein
The ratio of total quantity when being greater than default second proportion threshold value, as target current sampled point；
It is obtained in standard polarization curve corresponding with the fuel cell corresponding with each target current sampled point
Target voltage values.
Above-mentioned method optionally for each current sample point, determines corresponding average voltage level, comprising:
For each current sample point, sampling window is set separately in left and right ends adjacent thereto；
Each single point voltage value is chosen in the sampling window；
Calculate the average voltage level of each single point voltage value.
A kind of device for detecting performance of fuel cell, comprising:
First judgment module, for whether when detecting that fuel cell enters power generation mode, judging the fuel cell
Under steady state operating conditions；
It determines and obtains module, for if so, determining average voltage level corresponding with each target current sampled point and obtaining
Target voltage values corresponding with each target current sampled point；
Second judgment module, for being directed to each target current sampled point, judge corresponding average voltage level and
Whether the difference of target voltage values is greater than preset first difference value threshold value；
First determination module, for being adopted when the quantity greater than preset first difference value threshold value with each target current
When the ratio of the total quantity of sampling point is greater than preset first proportion threshold value, determine that the fuel battery performance is unsatisfactory for requiring.
Above-mentioned device, optionally, further includes:
Second determination module, for being adopted when the quantity greater than preset first difference value threshold value with each target current
When the ratio of the total quantity of sampling point is less than preset first proportion threshold value, determine that the fuel battery performance is met the requirements.
Above-mentioned device, optionally, the first judgment module includes:
First detection unit, for whether detecting the demand power of the fuel cell in the fluctuation of preset first range；
Second detection unit, for detect the fuel cell air road changes in flow rate whether in preset second model
Enclose interior fluctuation；
Third detection unit, for detect the fuel cell hydrogen road changes in flow rate whether in preset third model
Enclose interior fluctuation；
4th detection unit, for detect the fuel cell each target current sampled point curent change whether
Fluctuation in default 4th range.
Above-mentioned device, optionally, the determining module that obtains includes:
First determination unit, it is true according to corresponding each single point voltage value for being directed to each current sample point
Determine average voltage level；
Compare and give up unit, each single point voltage value is compared with corresponding average voltage level, by the difference of the two
The single point voltage value that value is greater than preset second discrepancy threshold is given up；
Second determination unit, for being directed to each current sample point, when the quantity for the single point voltage value that do not give up wherein
When being greater than default second proportion threshold value with the ratio of the total quantity of each single point voltage, sampled as target current
Point；
Acquiring unit, for being obtained in standard polarization curve corresponding with the fuel cell and each target electricity
Flow the corresponding target voltage values of sampled point.
Above-mentioned device, optionally, the first determination unit described in needle includes:
Subelement is set, for being directed to each current sample point, sampling is set separately in left and right ends adjacent thereto
Window；
Subelement is chosen, for choosing each single point voltage value in the sampling window；
Computation subunit, for calculating the average voltage level of each single point voltage value.
Compared with prior art, the present invention includes the following advantages:
The invention discloses a kind of method for testing performance of fuel cell, comprising: when detecting that fuel cell enters power generation
When mode, judge the fuel cell whether under steady state operating conditions；If so, determining corresponding with each target current sampled point flat
Equal voltage value simultaneously obtains target voltage values corresponding with each target current sampled point；It is sampled for each target current
Point, judges whether the difference of corresponding average voltage level and target voltage values is greater than preset first difference value threshold value；When
It is greater than greater than the ratio of the quantity of preset first difference value threshold value and the total quantity of each target current sampled point default
The first proportion threshold value when, determine that the fuel battery performance is unsatisfactory for requiring.The above process provides a kind of fuel cell
Method for testing performance does not need additionally to increase detection device in the detection process, so that it may realize the inspection to fuel battery performance
It surveys.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of method for testing performance flow chart of fuel cell disclosed in the embodiment of the present application；
Fig. 2 is a kind of signal of the standard polarization curve of fuel cell and deterioration polarization curve disclosed in the embodiment of the present application
Figure；
Fig. 3 is a kind of another method flow diagram of the method for testing performance of fuel cell disclosed in the embodiment of the present application；
Fig. 4 is a kind of current sample point acquisition window schematic diagram disclosed in the embodiment of the present application；
Fig. 5 is a kind of device for detecting performance structural block diagram of fuel cell disclosed in the embodiment of the present application.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
The present invention provides the method for testing performance and device of a kind of fuel cell, applies in the detection to fuel battery performance
In the process, fuel power down pond mainly includes hydrogen road, air road and water pipe line of reasoning, and hydrogen and air occur inside pile
Chemical reaction generates water, and chemical energy is converted into electric energy while discharging heat.The execution process of the detection method as shown in Figure 1,
Comprising steps of
S101, when detecting that fuel cell enters power generation mode, judge the fuel cell whether under steady state operating conditions；
The embodiment of the present invention detects the demand power of the fuel cell, when the demand power reaches preset power
When threshold value, determine that the fuel cell enters power generation mode, conversely, continuing to detect the fuel cell, when the combustion
Material battery enter after power generation mode, obtain the demand power of the fuel cell, the changes in flow rate on air road, hydrogen road stream
Whether the curent change of amount variation and target current sampled point detects the demand power of the fuel cell preset the respectively
The fluctuation of one range；Whether the changes in flow rate for detecting the air road of the fuel cell fluctuates in preset second range；Detection
Whether the changes in flow rate on the hydrogen road of the fuel cell fluctuates and detects the fuel cell within the scope of preset third
Whether the curent change of each target current sampled point fluctuates in default 4th range, when the demand power, the air
The curent change of the changes in flow rate on road, the changes in flow rate on the hydrogen road and the target current sampled point is in corresponding range
When interior fluctuation, determine that the fuel cell is under steady state operating conditions.
Wherein, the selection of first range, second range, the third range and the 4th range can be according to
It is chosen according to empirical value or concrete condition, to the specific value of above range without limiting in present invention implementation.
S102, if so, determining corresponding with each target current sampled point average voltage level and obtaining and each mesh
Mark the corresponding target voltage values of current sample point；
In the embodiment of the present invention, each target current sampled point is chosen, wherein the target current sampled point is effective
Point fluctuates steady-state current in a certain range since electric current can not be completely fixed, in order to accurately describe voltage
Value, for each target current sampled point, determines its corresponding average voltage level, in standard corresponding with the fuel cell
Target voltage values corresponding with each target current sampled point are obtained in polarization curve, wherein the standard polarization curve
The standard corresponding relationship for reacting voltage and current in the fuel cell, it is described when the fuel cell meets performance requirement
The polarization curve of fuel cell is identical as the standard polarization curve, when the performance of the fuel cell is unsatisfactory for requiring, institute
The polarization curve and the standard polarization curve for stating fuel cell there are deviation, by and the standard polarization curve there are deviations
Polarization curve, as deterioration polarization curve.Wherein, the signal of the standard polarization curve of the fuel cell and deterioration polarization curve
Figure is as shown in Figure 2.
S103, it is directed to each target current sampled point, judges corresponding average voltage level and target voltage values
Whether difference is greater than preset first difference value threshold value；
In the embodiment of the present invention, for each target current sampled point, the average voltage level and the target are calculated
The difference is compared with the default first difference value threshold value, judges whether the difference is greater than by the difference of voltage value
Preset first difference value threshold value, wherein the selection of the first difference value threshold value can empirically be worth or concrete condition
It is chosen, in the embodiment of the present invention, to the specific value of the first difference value threshold value without limiting.
S104, when be greater than preset first difference value threshold value quantity and each target current sampled point total quantity
Ratio be greater than preset first proportion threshold value when, determine that the fuel battery performance is unsatisfactory for requiring.
In the embodiment of the present invention, in each target current sampled point, the corresponding mesh of statistical average pressure value
The difference for marking pressure value is greater than the quantity of the preset first difference value threshold value, by itself and each target current sampled point
The ratio of total quantity be compared with preset first proportion threshold value, it is described preset to judge whether the ratio is greater than
First proportion threshold value, if so, determining that the fuel battery performance is unsatisfactory for requiring.
S106, when be greater than preset first difference value threshold value quantity and each target current sampled point total quantity
Ratio be less than preset first proportion threshold value when, determine that the fuel battery performance is met the requirements.
The invention discloses a kind of method for testing performance of fuel cell, comprising: when detecting that fuel cell enters power generation
When mode, judge the fuel cell whether under steady state operating conditions；If so, determining corresponding with each target current sampled point flat
Equal voltage value simultaneously obtains target voltage values corresponding with each target current sampled point；It is sampled for each target current
Point, judges whether the difference of corresponding average voltage level and target voltage values is greater than preset first difference value threshold value；When
It is greater than greater than the ratio of the quantity of preset first difference value threshold value and the total quantity of each target current sampled point default
The first proportion threshold value when, determine that the fuel battery performance is unsatisfactory for requiring.The above process provides a kind of fuel cell
Method for testing performance does not need additionally to increase detection device in the detection process, so that it may realize the inspection to fuel battery performance
It surveys.
In the embodiment of the present invention, determining average voltage level corresponding with each target current sampled point and acquisition and institute
State the execution process of the corresponding target voltage values of each target current sampled point as shown in figure 3, comprising steps of
S201, it is directed to each current sample point, determines average voltage level according to corresponding each single point voltage value；
In the embodiment of the present invention, since electric current can not be completely fixed, fluctuated in a certain range steady-state current,
For each current sample point, when acquiring its corresponding voltage in certain time interval T, an acquisition window DeltI can be set,
Voltage value in acquisition window, wherein schematic diagram such as Fig. 4 institute of current sample point acquisition window progress single point voltage value acquisition
Show, seeks the average voltage level of each single point voltage value collected.
S202, each single point voltage value is compared with corresponding average voltage level, the difference of the two is greater than pre-
If the single point voltage value of the second discrepancy threshold given up；
In the embodiment of the present invention, for each current sample point, calculates its corresponding each single point voltage value and be averaged
Each difference is compared by the difference of voltage value with preset second discrepancy threshold, difference is greater than described preset
The single point voltage value of second discrepancy threshold carries out giving up processing, wherein the selection of preset second discrepancy threshold can be according to
It is chosen according to empirical value or concrete condition, in the embodiment of the present invention, not to the specific value of the second difference value threshold value
It is defined.
S203, it is directed to each current sample point, quantity and each list when the single point voltage value that do not give up wherein
When the ratio of the total quantity of point voltage is greater than default second proportion threshold value, as target current sampled point；
In the embodiment of the present invention, for the corresponding each single point voltage value of each sampled point, when what ought be do not given up wherein
When the ratio of the quantity of single point voltage value and the total quantity of each single point voltage is greater than default second proportion threshold value, by it
As target current sampled point.Wherein, the selection of preset second proportion threshold value can empirically be worth or specific feelings
Condition is chosen, in the embodiment of the present invention, to the specific value of the second ratio value threshold value without limiting.
S204, it is obtained and each target current sampled point in standard polarization curve corresponding with the fuel cell
Corresponding target voltage values
In the embodiment of the present invention, the corresponding standard polarization curve of the fuel cell is traversed, is obtained and each target
The corresponding target voltage values of current sample point.
Based on a kind of method for testing performance of above-mentioned fuel cell, in the embodiment of the present invention, a kind of fuel is additionally provided
The structural block diagram of the device for detecting performance of battery, the detection device is as shown in Figure 5, comprising:
First judgment module 301 determines acquisition module 302, the second judgment module 303 and the first determination module 304.
Wherein,
The first judgment module 301, for when detecting that fuel cell enters power generation mode, judging the fuel electricity
Under steady state operating conditions whether pond；
The determining acquisition module 302, is used for if so, determining average voltage level corresponding with each target current sampled point
And obtain target voltage values corresponding with each target current sampled point；
Second judgment module 303 judges corresponding average electricity for being directed to each target current sampled point
Whether the difference of pressure value and target voltage values is greater than preset first difference value threshold value；
First determination module 304, for when the quantity and each mesh for being greater than preset first difference value threshold value
When marking the ratio of the total quantity of current sample point greater than preset first proportion threshold value, determine that the fuel battery performance is unsatisfactory for
It is required that.
The invention discloses a kind of device for detecting performance of fuel cell, comprising: when detecting that fuel cell enters power generation
When mode, judge the fuel cell whether under steady state operating conditions；If so, determining corresponding with each target current sampled point flat
Equal voltage value simultaneously obtains target voltage values corresponding with each target current sampled point；It is sampled for each target current
Point, judges whether the difference of corresponding average voltage level and target voltage values is greater than preset first difference value threshold value；When
It is greater than greater than the ratio of the quantity of preset first difference value threshold value and the total quantity of each target current sampled point default
The first proportion threshold value when, determine that the fuel battery performance is unsatisfactory for requiring.The above process provides a kind of fuel cell
Device for detecting performance does not need additionally to increase detection device in the detection process, so that it may realize the inspection to fuel battery performance
It surveys.
In the embodiment of the present invention, further includes: the second determination module 305.
Wherein,
Second determination module 305, for when the quantity and each mesh for being greater than preset first difference value threshold value
When marking the ratio of the total quantity of current sample point less than preset first proportion threshold value, determines that the fuel cell performance is able to satisfy and want
It asks.
In the embodiment of the present invention, the first judgment module 301 includes:
First detection unit 306, second detection unit 307, third detection unit 308 and the 4th detection unit 309.
Wherein,
The first detection unit 306, for whether detecting the demand power of the fuel cell in preset first model
Enclose fluctuation；
The second detection unit 307, for detecting whether the changes in flow rate on air road of the fuel cell is being preset
The second range in fluctuation；
The third detection unit 308, for detecting whether the changes in flow rate on hydrogen road of the fuel cell is being preset
Third within the scope of fluctuate；
4th detection unit 309 becomes for detecting the electric current of each target current sampled point of the fuel cell
Change and whether is fluctuated in default 4th range.
In the embodiment of the present invention, the determining module 305 that obtains includes:
First determination unit 310 compares and gives up unit 311, the second determination unit 312 and acquiring unit 313.
Wherein,
First determination unit 310, for being directed to each current sample point, according to corresponding each single-point electricity
Pressure value determines average voltage level；
Unit 311 is given up in the comparison, each single point voltage value is compared with corresponding average voltage level, by two
The single point voltage value that the difference of person is greater than preset second discrepancy threshold is given up；
Second determination unit 312, for being directed to each current sample point, when the single point voltage value that do not give up wherein
Quantity and the ratio of total quantity of each single point voltage when being greater than default second proportion threshold value, as target electricity
Flow sampled point；
The acquiring unit 313 is used to obtain in standard polarization curve corresponding with the fuel cell and described each
The corresponding target voltage values of a target current sampled point.
In the embodiment of the present invention, first determination unit 310 includes:
It sets subelement 314, choose subelement 315 and computation subunit 316.
Wherein,
The setting subelement 314 is set for being directed to each current sample point in left and right ends adjacent thereto respectively
Determine sampling window；
The selection subelement 315, for choosing each single point voltage value in the sampling window；
The computation subunit 316, for calculating the average voltage level of each single point voltage value.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For device class embodiment, since it is basically similar to the method embodiment, so being described relatively simple, related place ginseng
See the part explanation of embodiment of the method.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each unit can be realized in the same or multiple software and or hardware when invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
It realizes by means of software and necessary general hardware platform.Based on this understanding, technical solution of the present invention essence
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, server or the network equipment etc.) executes the certain of each embodiment or embodiment of the invention
Method described in part.
The method for testing performance and device of a kind of fuel cell provided by the present invention are described in detail above, this
Apply that a specific example illustrates the principle and implementation of the invention in text, the explanation of above example is only intended to
It facilitates the understanding of the method and its core concept of the invention；At the same time, for those skilled in the art, think of according to the present invention
Think, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as pair
Limitation of the invention.
Claims (6)
1. a kind of method for testing performance of fuel cell characterized by comprising
When detecting that fuel cell enters power generation mode, judge the fuel cell whether under steady state operating conditions；
If so, determining average voltage level corresponding with each target current sampled point of fuel cell and obtaining and each mesh
Mark the corresponding target voltage values of current sample point；
For each target current sampled point, judge whether the difference of corresponding average voltage level and target voltage values is big
In preset first difference value threshold value；
When the ratio of the quantity and the total quantity of each target current sampled point that are greater than preset first difference value threshold value is big
When preset first proportion threshold value, determine that the fuel battery performance is unsatisfactory for requiring；
Determining average voltage level corresponding with each target current sampled point simultaneously obtains and each target current sampling
The corresponding target voltage values of point, comprising:
For each current sample point, average voltage level is determined according to corresponding each single point voltage value；
Each single point voltage value is compared with corresponding average voltage level, it is poor that the difference of the two is greater than preset second
The single point voltage value of different threshold value is given up；
For each current sample point, when the single point voltage value that do not give up wherein quantity and each single point voltage it is total
When the ratio of number quantity is greater than default second proportion threshold value, as target current sampled point；
And the corresponding standard polarization curve of the fuel cell in obtain mesh corresponding with each target current sampled point
Mark voltage value；
For each current sample point, corresponding average voltage level is determined, comprising:
For each current sample point, sampling window is set separately in left and right ends adjacent thereto；
Each single point voltage value is chosen in the sampling window；
Calculate the average voltage level of each single point voltage value.
2. the method according to claim 1, wherein further include:
When the ratio of the quantity and the total quantity of each target current sampled point that are greater than preset first difference value threshold value is small
When preset first proportion threshold value, determine that the fuel battery performance is met the requirements.
3. the method according to claim 1, wherein judging when detecting that fuel cell enters power generation mode
Under steady state operating conditions whether the fuel cell, comprising:
Whether the demand power for detecting the fuel cell fluctuates in preset first range；
Whether the changes in flow rate for detecting the air road of the fuel cell fluctuates in preset second range；
Whether the changes in flow rate for detecting the hydrogen road of the fuel cell fluctuates within the scope of preset third；
Whether the curent change for detecting each target current sampled point of the fuel cell fluctuates in default 4th range.
4. a kind of device for detecting performance of fuel cell characterized by comprising
First judgment module, for when detecting that fuel cell enters power generation mode, judging the fuel cell whether steady
Under state operating condition；
It determines and obtains module, for if so, determining average voltage level corresponding with each target current sampled point of fuel cell
And obtain target voltage values corresponding with each target current sampled point；
Second judgment module judges corresponding average voltage level and target for being directed to each target current sampled point
Whether the difference of voltage value is greater than preset first difference value threshold value；
First determination module, for when the quantity and each target current sampled point for being greater than preset first difference value threshold value
Total quantity ratio be greater than preset first proportion threshold value when, determine that the fuel battery performance is unsatisfactory for requiring；
The determination obtains module
First determination unit determines flat for being directed to each current sample point according to corresponding each single point voltage value
Equal voltage value；
Compare and give up unit, each single point voltage value is compared with corresponding average voltage level, the difference of the two is big
Given up in the single point voltage value of preset second discrepancy threshold；
Second determination unit, for being directed to each current sample point, quantity and institute when the single point voltage value that do not give up wherein
When stating the ratio of the total quantity of each single point voltage greater than default second proportion threshold value, as target current sampled point；
Acquiring unit is adopted for obtaining in standard polarization curve corresponding with the fuel cell with each target current
The corresponding target voltage values of sampling point；
First determination unit includes:
Subelement is set, for being directed to each current sample point, sampling window is set separately in left and right ends adjacent thereto；
Subelement is chosen, for choosing each single point voltage value in the sampling window；
Computation subunit, for calculating the average voltage level of each single point voltage value.
5. device according to claim 4, which is characterized in that further include:
Second determination module, for when the quantity and each target current sampled point for being greater than preset first difference value threshold value
Total quantity ratio be less than preset first proportion threshold value when, determine that the fuel battery performance is met the requirements.
6. device according to claim 4, which is characterized in that the first judgment module includes:
First detection unit, for whether detecting the demand power of the fuel cell in the fluctuation of preset first range；
Second detection unit, for detect the fuel cell air road changes in flow rate whether in preset second range
Fluctuation；
Third detection unit, for detect the fuel cell hydrogen road changes in flow rate whether within the scope of preset third
Fluctuation；
4th detection unit, for detecting whether the curent change of each target current sampled point of the fuel cell is being preset
Fluctuation in 4th range.
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| CN201910556417.9A CN110082688B (en) | 2019-06-25 | 2019-06-25 | A kind of method for testing performance and device of fuel cell |
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| CN201910556417.9A CN110082688B (en) | 2019-06-25 | 2019-06-25 | A kind of method for testing performance and device of fuel cell |
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| Publication Number | Publication Date |
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| CN110082688A CN110082688A (en) | 2019-08-02 |
| CN110082688B true CN110082688B (en) | 2019-09-20 |
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