CN108037468A - A kind of fuel cell diagnostic device and method - Google Patents
A kind of fuel cell diagnostic device and method Download PDFInfo
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- CN108037468A CN108037468A CN201711450546.7A CN201711450546A CN108037468A CN 108037468 A CN108037468 A CN 108037468A CN 201711450546 A CN201711450546 A CN 201711450546A CN 108037468 A CN108037468 A CN 108037468A
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- fuel cell
- acquisition module
- frequency response
- current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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Abstract
The embodiment of the present invention proposes a kind of fuel cell diagnostic device and method, is related to field of new energy technologies.The device is by the way that sine-wave generator is electrically connected with perturbation load, perturbation load and workload are electrically connected with a fuel cell and form closed circuit, current acquisition module is electrically connected with multi-channel frequency response analyzer, voltage acquisition module is electrically connected with fuel cell and multi-channel frequency response analyzer, and determines the state in each region of fuel cell according to the magnitude of voltage of the multiple regions divided in advance in the current value of current acquisition module collection, the fuel cell of pressure acquisition module collection using multi-channel frequency response analyzer；Due to without being compared with calibration sample or benchmark sample characteristic, only by the way that the different zones of fuel cell are compared, just can be while judging that fuel cell whether there is failure, it can also learn the specific region broken down in fuel cell, the process of diagnosis fuel battery performance is not only simplify, also so that diagnostic function is more comprehensive.
Description
Technical field
The present invention relates to field of new energy technologies, in particular to a kind of fuel cell diagnostic device and method.
Background technology
In face of energy bottleneck and the haze of getting worse, development new-energy automobile is trend of the times.For environmental protection, reduce
Atmosphere pollution in city, is received more and more attention with the device that PEMFC (Proton Exchange Membrane Fuel Cells) is power.Mesh
Preceding vehicle fuel battery engine has good market expectations, is transferred to commercialization stage by the demonstrating running stage gradually.And car
With fuel battery engines commercialization must facing challenges be cost and service life, the length in service life depends on fuel cell powered
Machine system in itself and residing ambient condition, if we can be diagnosed to be the state of fuel battery engine system in itself, for
The lifting in fuel battery engine system service life is significant.
In the prior art, apply simple alternating current electric disturbance using online mostly, obtain the impedance of fuel cell pack, according to
Compared with calibration sample or benchmark sample characteristic, so that the method for diagnosing, analyzing fuel cell or fuel cell system.But using this
The drawbacks of mode, is that operation is relatively complicated, it is necessary to be compared with calibration sample or benchmark sample characteristic；In addition, finally obtain
Diagnosis, analysis result are more general, can not understand position and reason for learning that fuel cell specifically breaks down etc..
The content of the invention
In view of this, it is an object of the invention to provide a kind of fuel cell diagnostic device and method, to solve above-mentioned ask
Topic.
To achieve these goals, the technical solution that the embodiment of the present invention uses is as follows：
In a first aspect, an embodiment of the present invention provides a kind of fuel cell diagnostic device, the fuel cell diagnostic device
Including：Sine-wave generator, perturbation load, workload, current acquisition module, voltage acquisition module and multichannel frequency are rung
Analyzer is answered, the sine-wave generator is electrically connected with the perturbation load, and the perturbation load is electrically connected with a fuel cell
And closed circuit is formed, the workload is electrically connected with the fuel cell and forms closed circuit, the current acquisition mould
Block is electrically connected with the multi-channel frequency response analyzer, the voltage acquisition module and the fuel cell and described more logical
Road frequency response analyzer is electrically connected；
The sine-wave generator is used to export the sine wave signal of predetermined frequency to the fuel cell；
The current acquisition module is used to gather the current value for flowing through the fuel cell, and the current value is transmitted to
The multi-channel frequency response analyzer, wherein, the current value includes the alternating current and stream for flowing through the perturbation load
DC current through the workload；
The voltage acquisition module is used for the magnitude of voltage for gathering the multiple regions divided in advance in the fuel cell, and will be more
A magnitude of voltage is transmitted to the multi-channel frequency response analyzer；
The multi-channel frequency response analyzer is used to determine the fuel according to the current value, multiple magnitudes of voltage
The state in each region of battery.
Further, the multi-channel frequency response analyzer is used for according to the current value, multiple magnitude of voltage lifes
Into multiple Nyquist diagrams, each Nyquist diagram is corresponding with a region；
The multi-channel frequency response analyzer is additionally operable to each Nyquist diagram and determines that the fuel cell is each
Ohmic resistance, charge transfer resistance, mass transfer resistance, Ohmic resistance average value, charge transfer resistance average value and the biography in region
Matter resistance average value；
The multi-channel frequency response analyzer is additionally operable to according to the Ohmic resistance, charge transfer resistance, described
Mass transfer resistance, the Ohmic resistance average value, the charge transfer resistance average value and the mass transfer resistance average value determine
The state in each region of fuel cell.
Further, the multi-channel frequency response analyzer is used for when the Ohmic resistance is greater than or equal to described ohm
During the first preset multiple of resistance average value, determine that the structure in the region breaks down.
Further, the multi-channel frequency response analyzer is used for when the charge transfer resistance is more than or equal to described
During the second preset multiple of charge transfer resistance average value, determine that the Catalytic Layer in the region breaks down.
Further, the multi-channel frequency response analyzer is used for when the mass transfer resistance is greater than or equal to the mass transfer
During three preset multiple of resistance average value, the membrane electrode or pile distribution that determine the region break down.
Further, the sine-wave generator is integrated in the perturbation load.
Further, the current acquisition module is series at tie point and the institute of the perturbation load and the workload
State between fuel cell.
Further, the current acquisition module includes the first current acquisition module and the second current acquisition module, institute
State the first current acquisition module to be series between the primary sinusoid generator and the fuel cell, second electric current is adopted
Collect block coupled in series between second sine-wave generator and the fuel cell；
First current acquisition module is used to gather the DC current for flowing through the fuel cell；
Second current acquisition module is used to gather the alternating current for flowing through the fuel cell.
Further, the voltage acquisition module is integrated in the multi-channel frequency response analyzer.
Second aspect, the embodiment of the present invention additionally provide a kind of fuel cell diagnostic method, are examined applied to a fuel cell
Disconnected device, the fuel cell diagnostic device include：Sine-wave generator, perturbation load, workload, current acquisition module,
Voltage acquisition module and multi-channel frequency response analyzer, the sine-wave generator are electrically connected with the perturbation load, institute
State perturbation load to be electrically connected with a fuel cell and form closed circuit, the workload is electrically connected simultaneously with the fuel cell
Closed circuit is formed, the current acquisition module is electrically connected with the multi-channel frequency response analyzer, the voltage acquisition mould
Block is electrically connected with the fuel cell and the multi-channel frequency response analyzer, the fuel cell diagnostic method bag
Include：
Using the sine wave signal of sine-wave generator output predetermined frequency to the fuel cell；
The current value of the fuel cell is flowed through using current acquisition module collection, and the current value is transmitted to
The multi-channel frequency response analyzer, wherein, the current value includes the alternating current and stream for flowing through the perturbation load
DC current through the workload；
The magnitude of voltage of the multiple regions divided in advance in the fuel cell is gathered using the voltage acquisition module, and will be more
A magnitude of voltage is transmitted to the multi-channel frequency response analyzer；
Using the multi-channel frequency response analyzer fuel is determined according to the current value, multiple magnitudes of voltage
The state in each region of battery.
Fuel cell diagnostic device provided in an embodiment of the present invention and method, the device by by sine-wave generator with disturbing
Dynamic load is electrically connected, and perturbation load is electrically connected with a fuel cell and forms closed circuit, and workload is electrically connected with fuel cell
Connect and form closed circuit, current acquisition module is electrically connected with multi-channel frequency response analyzer, voltage acquisition module and fuel
Battery and multi-channel frequency response analyzer are electrically connected, and using multi-channel frequency response analyzer according to current acquisition mould
The magnitude of voltage of the multiple regions divided in advance in the fuel cell that current value that block is gathered and transmitted, pressure acquisition module are gathered and transmitted
Determine the state in each region of fuel cell；Due to without being compared with calibration sample or benchmark sample characteristic, only by by fuel
The different zones of battery are compared, just can be while judging that fuel cell whether there is failure, moreover it is possible to learn fuel cell
The specific region of middle failure, not only simplify diagnosis fuel battery performance process, also so that diagnostic function it is more powerful,
Comprehensively.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the circuit diagram of fuel cell diagnostic device provided in an embodiment of the present invention.
Fig. 2 shows the equivalent circuit diagram of the fuel cell under low current density state.
Fig. 3 shows the equivalent circuit diagram of the fuel cell under high current density state.
Fig. 4 shows the Nyquist diagram in the embodiment of the present invention.
Fig. 5 shows the flow chart of Battery Diagnostic method provided in an embodiment of the present invention.
Icon：100- fuel cell diagnostic devices；110- sine-wave generators；120- perturbation loads；130- workloads；
140- current acquisition modules；150- voltage acquisition modules；160- multi-channel frequency response analyzers；200- fuel cells.
Embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and designed with a variety of configurations herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Go out all other embodiments obtained on the premise of creative work, belong to the scope of protection of the invention.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
First embodiment
An embodiment of the present invention provides a kind of fuel cell diagnostic device 100, whether there is for diagnosing fuel cell 200
Failure.Referring to Fig. 1, the circuit diagram for fuel cell diagnostic device 100 provided in an embodiment of the present invention.Fuel cell diagnosis dress
Putting 100 includes：Sine-wave generator 110, perturbation load 120, workload 130, current acquisition module 140, voltage acquisition mould
Block 150 and multi-channel frequency response analyzer 160.Wherein, sine-wave generator 110 is electrically connected with perturbation load 120, disturbance
Load 120 is electrically connected with a fuel cell 200 and forms closed circuit, and workload 130 is electrically connected with fuel cell 200 and shape
Into closed circuit, current acquisition module 140 is electrically connected with multi-channel frequency response analyzer 160, voltage acquisition module 150 and combustion
Material battery 200 and multi-channel frequency response analyzer 160 are electrically connected.
Sine-wave generator 110 is used to export the sine wave signal of predetermined frequency to the fuel cell 200, and with disturbing
Dynamic load 120 coordinates together, and ac current signal is superimposed for fuel cell 200.
In a kind of preferred embodiment, sine-wave generator 110 can be integrated in perturbation load 120.That is perturbation load
120 itself just possess the sine wave signal of output predetermined frequency to the function of the fuel cell 200.
Furthermore, it is necessary to explanation, the frequency occurrence scope of sine-wave generator 110 is 0.01~10kHz, i.e. sine wave
Generator 110 can be with sine wave signal of the output frequency in 0.01~10kHz.
It should also be noted that, sine-wave generator 110 can export sine wave signal according to default mode, this is default
Mode includes but are not limited to following three kinds：
The first, full range scanning.When that cannot learn the substantially performance or failure of fuel cell 200, swept by full range
The mode retouched, successively from frequency high to low or from the as low as high sine wave signal for sequentially changing output, for example, can be according to
10kHz, 9kHz, 8kHz ... 1kHz, 900Hz ... 100Hz, 90Hz ... 10Hz ... the mode of 0.01Hz is sequentially output
Sine wave signal.
Second：Fractional scanning.Low frequency, intermediate frequency, high frequency sweep are carried out to fuel cell 200.
The third：Constant frequency scans.When only needing to learn that fuel cell 200 is specifically that structure, Catalytic Layer or membrane electrode go out
During existing failure, so as to input the sine wave signal of corresponding frequencies to fuel cell 200.For example, during Main Diagnosis Ohmic resistance, can
Scanned with constant high frequency, such as setting constant frequency 2kHz.
When workload 130 forms closed circuit with fuel cell 200, there is DC current signal to produce for workload
130 normal works.It is to be appreciated that workload 130 is in parallel with perturbation load 120.
Current acquisition module 140 is used to gather the current value for flowing through fuel cell 200, and current value is transmitted to multichannel
Frequency response analyzer 160.
It is to be appreciated that current value includes flowing through the alternating current of perturbation load 120 and flows through the straight of workload 130
Galvanic electricity stream.
In a kind of preferred embodiment, current acquisition module 140 is series at perturbation load 120 and workload 130
Between tie point and fuel cell 200, so that the current value that current acquisition module 140 collects just is to flow through perturbation load 120
Alternating current and flow through workload 130 DC current sum.
Furthermore, it is necessary to explanation, the wherein amplitude of alternating current are the 5%~10% of DC current.
Wherein, voltage acquisition module 150 is used for the magnitude of voltage for gathering the multiple regions divided in advance in fuel cell 200, and
Multiple magnitudes of voltage are transmitted to multi-channel frequency response analyzer 160.
It should be noted that the region divided in advance can be different according to the specific requirements of user.Specifically, user can be according to
Position divides fuel cell 200, and fuel cell 200 is divided into 5 areas, wherein, 1st area, 5th area are marginal zone, and 3 are such as
Middle area, 2,4 areas are transition region, certainly, in other embodiments, fuel cell 200 can also be divided into other quantity
Region, is not particularly limited herein；In addition, user can also divide fuel cell 200 according to decay characteristics, so that according to
According to the practical operation situation of pile, fuel cell 200 is divided into high-capacity area, low performance region and performance area placed in the middle
Domain.
In addition it is also necessary to which explanation, fuel cell 200 include multiple batteries, multiple batteries are sequentially connected in series to form pile.
When carrying out region division, battery all in pile can all be carried out region division by user so that be provided with per batteries
Corresponding region；A region can also be formed from pile by any selected parts multiple batteries, be not particularly limited herein.
Then it is to be appreciated that each magnitude of voltage collected is the voltage drop value connected by multiple batteries and produced.Pass through
The magnitude of voltage of multiple batteries in each region is gathered, the influence of single battery can be reduced, so that avoid in conventional art, by
In the precision brought of magnitude of voltage for gathering single battery is insufficient the problem of；In addition it is also possible to avoid some special a examples during sampling
The influence of generation so that final measurement result is more accurate.
Multi-channel frequency response analyzer 160 is used to determine 200 each area of fuel cell according to current value, multiple magnitudes of voltage
The state in domain.
Specifically, multi-channel frequency response analyzer 160 is used to generate multiple Ni Kuisi according to current value, multiple magnitudes of voltage
Spy's figure, each Nyquist diagram are corresponding with a region.
It should be noted that multi-channel frequency response analyzer 160 can learn current density according to current value, and according to electricity
Current density draws the equivalent circuit diagram of fuel cell 200, so as to generate multiple Nyquist diagrams.Wherein, in low current density
The equivalent circuit diagram of fuel cell 200 under state is as shown in Fig. 2, fuel cell 200 under high current density state
Equivalent circuit diagram is as shown in Figure 3.Wherein, RΩIt is ohmage (Ohmic losses), Rct,AIt is anode activation Loss impedance,
Rct,CIt is activation of cathode Loss impedance, RmtMass transfer impedance, anode activation Loss impedance and activation of cathode Loss impedance and be
For charge transfer resistance.
Multi-channel frequency response analyzer 160 is additionally operable to each Nyquist diagram and determines 200 each region of fuel cell
Ohmic resistance, charge transfer resistance, mass transfer resistance, Ohmic resistance average value, charge transfer resistance average value and mass transfer resistance
Average value.
Multi-channel frequency response analyzer 160 is additionally operable to according to Ohmic resistance, charge transfer resistance, mass transfer resistance, ohm
Resistance average value, charge transfer resistance average value and mass transfer resistance average value determine the state in 200 each region of fuel cell.
It should be noted that Ohmic resistance average value is the average value of the Ohmic resistance in each region, charge transfer resistance
Average value is the average value of the charge transfer resistance in each region, and mass transfer resistance average value is the flat of the mass transfer resistance in each region
Average.
Specifically, multi-channel frequency response analyzer 160 is used for when Ohmic resistance is greater than or equal to Ohmic resistance average value
The first preset multiple when, determine region structure break down；When charge transfer resistance is greater than or equal to charge transfer resistance
During the second preset multiple of average value, determine that the Catalytic Layer in region breaks down；When mass transfer resistance is greater than or equal to mass transfer resistance
During three preset multiple of average value, the membrane electrode or pile distribution that determine region break down.
In addition, structure breaks down and can refer to the structure design in the area there are problem, it is also possible to exists when assembling and asks
Topic；When charge transfer resistance is greater than or equal to the second preset multiple of charge transfer resistance average value, then the catalysis in the region
There is decay in layer；When mass transfer resistance is greater than or equal to three preset multiple of mass transfer resistance average value, Ze Gai areas (or section) film
Electrode hydrophilic and hydrophobic changes or membrane electrode internal interface goes wrong or pile distribution there are problem.
It should be noted that the first preset multiple, the second preset multiple and the 3rd preset multiple are all in accordance with membrane electrode
What the parameter designing scope and accuracy of detection of (Membrane Electrode Assemblies, MEA) were set.
It should also be noted that, above-mentioned judging result, is to be obtained in the case of the initial quality inspection qualification of membrane electrode.
For example, a fuel cell 200 is sequentially connected in series by 130 economize on electricity heaps, 130 economize on electricity heaps are uniformly divided into 5 by this
Part, 1-26 Zone1,27-52 Zone2,53-84 Zone3,85-104 Zone4,105-130 Zone5, per area
15 sections are respectively taken to be tested, Zone1 takes 1-15 to save, and Zone2 takes 33-47 to save, and Zone3 takes 58-72 to save, and Zone4 takes 88-102 to save,
Zone5 takes 116-130 to save.
Wherein, it is that (current density corresponds to 800A/cm2, Dan Chiyou to 225.6A that workload 130, which sets DC current to export,
Effect area is 282cm2)；110 frequency range of sine-wave generator is 0.01~10kHz, and alternating current amplitude is 5%*225.6A
=11.28A, by the way of full range scanning.
Referring to Fig. 4, the multiple Buddhist nuns generated for multi-channel frequency response analyzer 160 according to current value, multiple magnitudes of voltage
Qwest schemes, and each Nyquist diagram is corresponding with a region.Calculate and obtain through multi-channel frequency response analyzer 160 again
Ohmic resistance, charge transfer resistance, mass transfer resistance, Ohmic resistance average value, charge transfer resistance average value and mass transfer resistance
Average value, the results are shown in Table 1 for it.
By the parameter designing scope of membrane electrode, device accuracy of detection, it may be determined that the first preset multiple is 1+15%=
1.5, the second preset multiple is 1+10%=1.1, and the 3rd preset multiple is 1+10%=1.1.
1 impedance value result of calculation of table
| Title | RΩ | RCt, A+RCt, C | Rmt |
| Sequence number | mohm | mohm | mohm |
| 1 | 2.5 | 10 | 5.2 |
| 2 | 2.4 | 8.7 | 4.3 |
| 3 | 2.78 | 6.9 | 3.7 |
| 4 | 3.1 | 6 | 3.8 |
| 5 | 2.88 | 6.7 | 4.4 |
| Average value | 2.732 | 7.66 | 4.28 |
Analysis obtains Zone1 areas：
RCt, A+RCt, C＞ 7.66 × (1+10%)=8.426；
Rmt＞ 4.28 × (1+10%)=4.708；
Obtain Zone2 areas：
RCt, A+RCt, C＞ 7.66 × (1+10%)=8.426；
So as to：There is exception in Zone1 areas charge transfer resistance and mass transfer resistance, possible cause is deposited for Zone1 areas Catalytic Layer
Decaying, and area's mass transfer resistance is bigger than normal, possible cause changes for electrode hydrophilic and hydrophobic or membrane electrode internal interface goes out
There are problem for existing problem or pile distribution；There is exception in Zone2 areas charge transfer resistance, possible cause is Zone2 areas Catalytic Layer
There are decay.Overall Evaluation, the highway distribution effects deviation of pile for the 200 homogeneous sexual deviation of fuel cell most
Main cause.
Second embodiment
The embodiment of the present invention additionally provides a kind of fuel cell diagnostic device 100, it is necessary to explanation, the embodiment of the present invention
The technique effect of the fuel cell diagnostic device 100 provided, its basic principle and generation is identical with above-described embodiment, is brief
Description, the present embodiment part do not refer to part, refer to corresponding contents in the above embodiments.
In the present embodiment, current acquisition module 140 includes the first current acquisition module and the second current acquisition module,
First current acquisition module is series between workload 130 and fuel cell 200, and the second current acquisition module is series at disturbance
Between load 120 and fuel cell 200, and the first current acquisition module, the second current acquisition module are rung with multichannel frequency
Analyzer 160 is answered to be electrically connected.
Wherein, the first current acquisition module is used to gather the DC current for flowing through fuel cell 200；Second current acquisition mould
Block is used to gather the alternating current for flowing through fuel cell 200, and DC current, alternating current are transmitted to multichannel frequency respectively
Both are added the electric current that can obtain flowing through fuel cell 200 by response analyzer 160, multi-channel frequency response analyzer 160
Value.
In a kind of preferred embodiment, current acquisition module 140 also may not include the second current acquisition module.Due to handing over
The amplitude of galvanic electricity stream is the 5%~10% of DC current, thus multi-channel frequency response analyzer 160 passes through the first current acquisition
The DC current and DC current and the proportionate relationship of alternating current that module collects, can obtain flowing through fuel cell 200
Current value.
In addition, in the present embodiment, voltage acquisition module 150 is integrated in multi-channel frequency response analyzer 160, i.e., it is more logical
Road frequency response analyzer 160 itself just possesses measurement, the function of collection voltages.
3rd embodiment
An embodiment of the present invention provides a kind of fuel cell diagnostic method, applied to Battery Diagnostic device, for diagnosing electricity
Pond whether there is failure.Referring to Fig. 5, the flow chart for Battery Diagnostic method provided in an embodiment of the present invention.The fuel cell
Diagnostic method includes：
Step S501：The sine wave signal of predetermined frequency is exported to fuel cell 200 using sine-wave generator 110.
Step S502：The current value for flowing through fuel cell 200 is gathered using current acquisition module 140, and current value is passed
Transport to multi-channel frequency response analyzer 160.
Wherein, current value includes flowing through the alternating current of perturbation load 120 and flows through the direct current of workload 130
Stream.
Step S503：The voltage of the multiple regions divided in advance in fuel cell 200 is gathered using voltage acquisition module 150
Value, and multiple magnitudes of voltage are transmitted to multi-channel frequency response analyzer 160.
Step S504：Using multi-channel frequency response analyzer 160 fuel cell is determined according to current value, multiple magnitudes of voltage
The state in 200 each regions.
In conclusion fuel cell diagnostic device provided in an embodiment of the present invention and method, the device is by by sine wave
Generator is electrically connected with perturbation load, and perturbation load is electrically connected with a fuel cell and forms closed circuit, workload and combustion
Material battery is electrically connected and forms closed circuit, and current acquisition module is electrically connected with multi-channel frequency response analyzer, voltage acquisition
Module is electrically connected with fuel cell and multi-channel frequency response analyzer, and utilizes multi-channel frequency response analyzer foundation
The multiple regions divided in advance in the battery that current value that current acquisition module is gathered and transmitted, pressure acquisition module are gathered and transmitted
Magnitude of voltage determines the state in each region of battery；Due to without being compared with calibration sample or benchmark sample characteristic, only by by electricity
The different zones in pond are compared, just can be while judging that battery whether there is failure, moreover it is possible to learn in battery and break down
Specific region, not only simplify diagnosis battery performance process, also so that diagnostic function it is more powerful, comprehensive.
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 actual relation or order.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 key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there are other identical element in process, method, article or equipment including the key element.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.It should be noted that：Similar label and letter exists
Similar terms is represented in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, is then not required in subsequent attached drawing
It is further defined and is explained.
Claims (10)
1. a kind of fuel cell diagnostic device, it is characterised in that the fuel cell diagnostic device includes：Sine-wave generator,
Perturbation load, workload, current acquisition module, voltage acquisition module and multi-channel frequency response analyzer, the sine
Wave producer is electrically connected with the perturbation load, and the perturbation load is electrically connected with a fuel cell and forms closed circuit, institute
State workload to be electrically connected with the fuel cell and form closed circuit, the current acquisition module and the multichannel frequency
Response analyzer is electrically connected, and the voltage acquisition module and the fuel cell and the multi-channel frequency response analyzer are equal
It is electrically connected；
The sine-wave generator is used to export the sine wave signal of predetermined frequency to the fuel cell；
The current acquisition module, which is used to gather, flows through the current value of the fuel cell, and the current value is transmitted to described
Multi-channel frequency response analyzer, wherein, the current value includes flowing through the alternating current of the perturbation load and flows through institute
State the DC current of workload；
The voltage acquisition module is used to gathering the magnitudes of voltage of the multiple regions divided in advance in the fuel cell, and by multiple institutes
State magnitude of voltage and be transmitted to the multi-channel frequency response analyzer；
The multi-channel frequency response analyzer is used to determine the fuel cell according to the current value, multiple magnitudes of voltage
The state in each region.
2. fuel cell diagnostic device as claimed in claim 1, it is characterised in that the multi-channel frequency response analyzer is used
According to the current value, the multiple Nyquist diagrams of multiple magnitude of voltage generations, each Nyquist diagram and a region phase
It is corresponding；
The multi-channel frequency response analyzer is additionally operable to each Nyquist diagram and determines each region of the fuel cell
Ohmic resistance, charge transfer resistance, mass transfer resistance, Ohmic resistance average value, charge transfer resistance average value and mass transfer electricity
Hinder average value；
The multi-channel frequency response analyzer is additionally operable to according to the Ohmic resistance, the charge transfer resistance, the mass transfer
Resistance, the Ohmic resistance average value, the charge transfer resistance average value and the mass transfer resistance average value determine described
The state in each region of fuel cell.
3. fuel cell diagnostic device as claimed in claim 2, it is characterised in that the multi-channel frequency response analyzer is used
When the first preset multiple of the Ohmic resistance average value is greater than or equal to when the Ohmic resistance, the knot in the region is determined
Structure breaks down.
4. fuel cell diagnostic device as claimed in claim 2, it is characterised in that the multi-channel frequency response analyzer is used
When the second preset multiple of the charge transfer resistance average value is greater than or equal to when the charge transfer resistance, determine described
The Catalytic Layer in region breaks down.
5. fuel cell diagnostic device as claimed in claim 2, it is characterised in that the multi-channel frequency response analyzer is used
When three preset multiple of the mass transfer resistance average value is greater than or equal to when the mass transfer resistance, the film in the region is determined
Electrode or pile distribution are broken down.
6. the fuel cell diagnostic device as described in any one in claim 1-5, it is characterised in that the sine wave occurs
Device is integrated in the perturbation load.
7. the fuel cell diagnostic device as described in any one in claim 1-5, it is characterised in that the current acquisition mould
Block is series between the tie point of the perturbation load and the workload and the fuel cell.
8. the fuel cell diagnostic device as described in any one in claim 1-5, it is characterised in that the current acquisition mould
Block includes the first current acquisition module and the second current acquisition module, and first current acquisition module is series at the work
Between load and the fuel cell, second current acquisition module be series at the perturbation load and the fuel cell it
Between；
First current acquisition module is used to gather the DC current for flowing through the fuel cell；
Second current acquisition module is used to gather the alternating current for flowing through the fuel cell.
9. the fuel cell diagnostic device as described in any one in claim 1-5, it is characterised in that the voltage acquisition mould
Block is integrated in the multi-channel frequency response analyzer.
10. a kind of fuel cell diagnostic method, it is characterised in that applied to a fuel cell diagnostic device, the fuel cell
Diagnostic device includes：Sine-wave generator, perturbation load, workload, current acquisition module, voltage acquisition module and more logical
Road frequency response analyzer, the sine-wave generator are electrically connected with the perturbation load, the perturbation load and fuel electricity
Pond is electrically connected and forms closed circuit, and the workload is electrically connected with the fuel cell and forms closed circuit, the electricity
Stream acquisition module is electrically connected with the multi-channel frequency response analyzer, the voltage acquisition module and the fuel cell and
The multi-channel frequency response analyzer is electrically connected, and the fuel cell diagnostic method includes：
Using the sine wave signal of sine-wave generator output predetermined frequency to the fuel cell；
The current value of the fuel cell is flowed through using current acquisition module collection, and the current value is transmitted to described
Multi-channel frequency response analyzer, wherein, the current value includes flowing through the alternating current of the perturbation load and flows through institute
State the DC current of workload；
Gather the magnitude of voltage of the multiple regions divided in advance in the fuel cell using the voltage acquisition module, and by multiple institutes
State magnitude of voltage and be transmitted to the multi-channel frequency response analyzer；
Using the multi-channel frequency response analyzer fuel cell is determined according to the current value, multiple magnitudes of voltage
The state in each region.
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