CN109828209A - Fuel cell pile method for diagnosing faults - Google Patents
Fuel cell pile method for diagnosing faults Download PDFInfo
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- CN109828209A CN109828209A CN201811639624.2A CN201811639624A CN109828209A CN 109828209 A CN109828209 A CN 109828209A CN 201811639624 A CN201811639624 A CN 201811639624A CN 109828209 A CN109828209 A CN 109828209A
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- bipolar plates
- fuel cell
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- cell pile
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Abstract
This application involves a kind of fuel cell pile method for diagnosing faults.The described method includes: S10, calculates the bipolar plates along the current value of the transverse current perpendicular to principal current direction flowing；S20, if the current value is greater than preset threshold, judgement has abnormal fuel battery monomer, and executes S30；S30, the flow direction of the plane according to the transverse current in the different bipolar plates in the bipolar plates, determines the position of the abnormal fuel battery monomer current convergence.It can decide whether that there are the abnormal fuel battery monomers by the size of the current value, the position of the abnormal fuel battery monomer then further determined by the flow direction of the transverse current.Therefore fuel cell pile method for diagnosing faults described in the embodiment of the present application determines that the location method of the abnormal fuel battery monomer is simple, and speed is high-efficient fastly.
Description
Technical field
This application involves energy fields, more particularly to a kind of fuel cell pile method for diagnosing faults.
Background technique
Failure in the technology of traditional fuel cell pile fault diagnosis, in multi-disc heap after a certain piece performance decline
Diagnosis, can only carry out rough judgement by voltage, and such judgement is very inaccurate.Although the ac impedance spectroscopy of monolithic is surveyed
Examination can be very good to qualitatively judge the state of each monolithic, but this method needs high-precision, the alternating current impedance instrument of multichannel,
And the time once tested is longer, and diagnostic method is excessively complicated.It can not accomplish real-time response, influence working efficiency.
Summary of the invention
Based on this, it is necessary to which inaccurate for existing method for diagnosing faults result, diagnostic method is excessively complicated to ask
Topic, provides a kind of quick fuel cell pile method for diagnosing faults.
A kind of fuel cell pile method for diagnosing faults, the fuel cell pile include multiple concatenated fuel cell lists
Piece, the fuel cell monolithic include fuel cell membrane electrode assembly and bipolar plates, the fuel cell membrane electrode assembly and institute
Bipolar plates are stated to be arranged alternately along principal current direction, which comprises
S10 calculates the bipolar plates along the current value of the transverse current perpendicular to principal current direction flowing；
S20, if the current value is greater than preset threshold, judgement has abnormal fuel battery monomer, and executes S30；
S30, the flow direction of the plane according to the transverse current in the different bipolar plates in the bipolar plates, really
The position of the fixed abnormal fuel battery monomer current convergence.
In one embodiment, the step S10 includes:
S100 detects the potential difference at the both ends of the bipolar plates perpendicular to the principal current direction；
S200, the current value based on transverse current described in the potential difference and the bipolar plates resistance calculations.
In one embodiment, each bipolar plates include opposite first end and perpendicular to the principal current direction
Two ends, the S100 include:
The potential definition for being located at the most marginal bipolar plates of the fuel cell pile is basic potential by S110；
S120 detects the first potential difference between the first end of the every two adjacent bipolar plates, by described
Basic potential and first potential difference obtain each described bipolar plates in the first potential of the first end；
S130 detects the second potential difference of the second end between the every two adjacent bipolar plates, by described
Basic potential and second potential difference obtain each described bipolar plates in the second potential of the second end；
S140 obtains the potential of the bipolar plates by the first potential and the second potential of the same bipolar plates
Difference.
In one embodiment, first electricity is obtained by being set to the voltage polling at the fuel cell pile both ends
Potential difference and second potential difference.
In one embodiment, in the step S200, the bipolar plates resistance by the conductivity of the bipolar plates,
The length of the bipolar plates, the height of the bipolar plates and the bipolar plates THICKNESS CALCULATION obtain.
In one embodiment, if the current value is not more than the preset value, judge at the fuel cell pile
In normal condition.
In one embodiment, in the S30, if flowing to for the transverse current in all bipolar plates is identical,
Then the abnormal fuel battery cell is located at least one end in the both ends of fuel cell pile described in the principal current direction.
In one embodiment, in the S30, if the incomplete phase of flow direction of the transverse current in the bipolar plates
Together, then the abnormal fuel battery cell is located between two opposite bipolar plates of transverse current flow direction.
In one embodiment, it may further comprise: after the step S30
S40, the flow direction of the plane according to the transverse current in the different bipolar plates in the bipolar plates, really
The position of the fixed abnormal fuel battery cell current convergence.
In one embodiment, the position of the abnormal fuel battery monomer current convergence includes that cathode inlet, cathode go out
Mouth and anode inlet etc..
The fuel cell pile method for diagnosing faults provided by the embodiments of the present application, by calculating the bipolar plates along vertical
Directly it can decide whether that there are abnormal fuel battery monomers in the current value of the transverse current of principal current direction flowing.According to
The flow direction of plane of the transverse current in the bipolar plates in the difference bipolar plates determines the abnormal combustion
Expect the position of battery current.Can decide whether that there are the abnormal fuel batteries by the size of the current value, then into
One step determines the position of the abnormal fuel battery by the flow direction of the transverse current.Therefore described in the embodiment of the present application
Fuel cell pile method for diagnosing faults determine that the location method of the abnormal fuel battery is simple, speed is high-efficient fastly.
Detailed description of the invention
Fig. 1 is fuel cell pile method for diagnosing faults flow chart provided by the embodiments of the present application；
Fig. 2 is fuel cell pile voltage measurement schematic diagram provided by the embodiments of the present application；
Fig. 3 is transverse current flow direction schematic diagram provided by the embodiments of the present application；
Fig. 4 is the transverse current flow direction schematic diagram that another embodiment of the application provides.
Specific embodiment
In order to which the objects, technical solutions and advantages of the application are more clearly understood, by the following examples, and combine attached
Figure, is further elaborated the fuel cell pile method for diagnosing faults of the application.It should be appreciated that described herein
Specific embodiment only to explain the application, is not used to limit the application.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).In the description of the present application, it is to be understood that term " on ", "lower", "front", "rear", " left side ",
The orientation of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", " counterclockwise " or position are closed
System indicates to be based on the orientation or positional relationship shown in the drawings, being merely for convenience of description the application and simplifying description
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the application.
In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Referring to Figure 1, the embodiment of the present application provides a kind of fuel cell pile method for diagnosing faults.The fuel cell electricity
Heap includes multiple concatenated fuel cell monolithics.The fuel cell monolithic includes fuel cell membrane electrode assembly and bipolar plates.
The fuel cell membrane electrode assembly and the bipolar plates are arranged alternately along principal current direction.The described method includes:
S10 calculates the bipolar plates along the current value of the transverse current perpendicular to principal current direction flowing；
S20, if the current value is greater than preset threshold, judgement has abnormal fuel battery monomer, and executes S30；
S30, the flow direction of the plane according to the transverse current in the different bipolar plates in the bipolar plates, really
The position of the fixed abnormal fuel battery monomer current convergence.
In the step S10, the principal current direction can be in the fuel cell membrane electrode assembly and described pair
The direction that pole plate is stacked.When i.e. described fuel cell pile is normal, the principal current flows successively through multiple fuel electricity
Pond membrane electrode assembly and multiple bipolar plates.When some described fuel cell performance deteriorates, electric current
It can be concentrated in the region of better performances.Other normal fuel cells adjacent thereto are compared, it may appear that biggish electricity
Flow distribution difference.In order to balance this species diversity, electric current can be shared in normal fuel cell monomer and abnormal fuel battery cell
Flowing forms the transverse current in the bipolar plates.It is appreciated that the bipolar plates positioned at the fuel cell pile most both ends
It can connect collector, as positive and negative anodes, external output power.
In the step S20, pass through the size of the current value, it can be determined that whether there is fuel cell to occur different
Often.And the lesser transverse current can be ignored, it is believed that the fuel cell belongs to normal condition.When the current value
When greater than preset threshold, it is possible to determine that at least one described fuel cell occurs abnormal.It is appreciated that the preset threshold
It can be empirical value.
In the step S30, the transverse current can be flowed towards the bipolar board ends both direction.And according to
The direction of current flow of the bipolar plates can determine the position for the abnormal fuel cell occur.According to the transverse direction
The flow direction of electric current can efficiently determine the specific location of the abnormal fuel electricity monomer.
The fuel cell pile method for diagnosing faults provided by the embodiments of the present application, by calculating the bipolar plates along vertical
Directly it can decide whether that there are abnormal fuel battery cells in the current value of the transverse current of principal current direction flowing.According to
The flow direction of plane of the transverse current in the bipolar plates in the difference bipolar plates determines the abnormal combustion
Expect the position of battery cell current convergence.It can decide whether that there are the abnormal fuel batteries by the size of the current value
Then monomer further determines the position of the abnormal fuel battery cell by the flow direction of the transverse current.Therefore
Fuel cell pile method for diagnosing faults described in the embodiment of the present application determines the location method of the abnormal fuel battery cell
Simply, speed is high-efficient fastly.
In one embodiment, the step S10 includes:
S100 detects the potential difference at the both ends of the bipolar plates perpendicular to the principal current direction；
S200, the current value based on transverse current described in the potential difference and the bipolar plates resistance calculations.
In one embodiment, each bipolar plates include opposite first end and perpendicular to the principal current direction
Two ends, the S100 include:
The potential definition for being located at the most marginal bipolar plates of the fuel cell pile is basic potential by S110；
S120 detects the first potential difference between the first end of the every two adjacent bipolar plates, by described
Basic potential and first potential difference obtain each described bipolar plates in the first potential of the first end；
S130 detects the second potential difference of the second end between the every two adjacent bipolar plates, by described
Basic potential and second potential difference obtain each described bipolar plates in the second potential of the second end；
S140 obtains the potential of the bipolar plates by the first potential and the second potential of the same bipolar plates
Difference.
Refer to Fig. 2, in the present embodiment, in the step S110, two distalmost end of the fuel cell pile it is bipolar
Plate is all equipotentiality body.Therefore can using the potential of the bipolar plates positioned at the fuel cell pile one side edge as
Potential reference.The i.e. described basic potential.In one embodiment, the bipolar plates for selecting fuel cell pile cathode are 0V equipotentiality
Body, the potential difference between adjacent bipolar plates recorded by voltage polling, can be calculated each described bipolar plates one by one
The potential of upper arrangement inspection position.
In formula, i=1,2,3,4 ... n+1 represent the serial number of the bipolar plates, and j=1,2 ..., n represent fuel cell
The serial number of monomer.VCell (j), 1Represent the first potential difference, VCell (j), 2Represent second potential difference, UI, 1Represent first electricity
Gesture；UI, 2Represent second potential.
In one embodiment, first electricity is obtained by being set to the voltage polling at the fuel cell pile both ends
Potential difference and second potential difference.The voltage polling can be arranged in the bipolar plates.The voltage polling equipment can be with
It is two sets, is respectively arranged at the both ends of the transverse current.It is appreciated that when generating transverse current in the bipolar plates, it is described
The potential difference will be shown in bipolar plates.
In one embodiment, in the step S200, the bipolar plates resistance by the conductivity of the bipolar plates,
The length of the bipolar plates, the height of the bipolar plates and the bipolar plates THICKNESS CALCULATION obtain.
It is bipolar plates length that wherein σ, which is conductivity, l, and h is bipolar plates height, and δ is bipolar plate thickness.Electricity in bipolar plates
Stream can be obtained by Ohm's law.Based on this method, the electric current in all bipolar plates can be calculated.
In one embodiment, if the current value is not more than the preset value, judge at the fuel cell pile
In normal condition.
In one embodiment, in the S30, if flowing to for the transverse current in all bipolar plates is identical,
Then the abnormal fuel battery monomer is located at least one end in the both ends of fuel cell pile described in the principal current direction.
In one embodiment, in the S30, if the incomplete phase of flow direction of the transverse current in the bipolar plates
Together, then the abnormal fuel battery monomer is located between two opposite bipolar plates of transverse current flow direction.
It may further comprise: after the step S30
S40, the flow direction of the plane according to the transverse current in the different bipolar plates in the bipolar plates, really
The position of the fixed abnormal fuel battery monomer current convergence.
Fig. 3 is referred to, (fuel is electric in diagram for the fuel cell monolithic when the side for being located at the fuel cell pile
Pond monolithic 1) when occurring abnormal, electric current can be towards (the left current concentration zones in diagram) in the segment set of better performances, and pass through
The bipolar plates are spread towards fuel cell monolithic described in its (fuel cell monolithic 2-4 in diagram).It can thus determine described
The position of abnormal fuel battery monomer.Similarly, when the fuel cell monolithic for the other side for being located at the fuel cell pile
When (the fuel cell monolithic 4 in diagram) occurs abnormal, current convergence is on the side (right side in diagram of the monolithic better performances
Side current convergence area), the electric current in other fuel cell monolithics, which is gradually assembled by the bipolar plates to the side, to be assembled.I.e.
Flowing to for the transverse current in all bipolar plates is identical.
Fig. 4 is referred to, the flow direction of the transverse current of the bipolar plates of 7 two sides of fuel cell monolithic is opposite.
Therefore, more densely distributed than the left current of the fuel cell monolithic 7 in the electric current of 7 right area of fuel cell monolithic.At this time
It is considered that the fuel cell monolithic 7 is the abnormal fuel battery monomer.
In the present embodiment, i.e., the cross of the bipolar plates between the described fuel cell monolithic 7 and the fuel cell monolithic 6
Assemble to electric current to the right side of fuel cell monolithic 7.The electric current on 7 right side of fuel cell monolithic can be from the fuel cell
Bipolar plates between monolithic 7 and the fuel cell monolithic 8 flow to the left.It can be considered that the fuel cell monolithic 7
The highest current density on right side.
In one embodiment, the position of the abnormal fuel battery monomer current convergence includes that cathode inlet, cathode go out
Mouth and anode inlet.
For current convergence in cathode inlet, research finds to cause to be exactly that cathode water logging or cathode lack the reason of this
Gas.And the reason of leading to cathode water logging and cathode deficency, generally have that cathode excess coefficient is insufficient, monolithic temperature is too low (causes
Water vapor condensation ponding), the humidification of cathode inlet is excessive, (increased hydrophilicity, water are more difficult to arrange the decline of internal gas diffusion layer
The reasons such as out).
For current convergence in cathode outlet, research finds to cause to be exactly that dry (internal state is too dry for film the reason of this
).There are many kinds of the reasons for causing film dry, for example the humidification of cathode inlet is insufficient, monolithic temperature is excessively high, excess coefficient is excessive
(gas is too many, and water is taken away).
For current convergence in anode inlet.The reason of research finds to generally result in this is exactly anode deficency, leads to sun
There are many kinds of the reason of pole deficency, for example anode excess coefficient deficiency, anode water logging, monolithic temperature are too low, internal gas diffusion
The reasons such as layer decline (increased hydrophilicity, water are more difficult to be discharged).
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation of this patent range therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from the application design, various modifications and improvements can be made, these belong to the protection scope of the application.
Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of fuel cell pile method for diagnosing faults, the fuel cell pile includes multiple concatenated fuel cell lists
Piece, the fuel cell monolithic include fuel cell membrane electrode assembly and bipolar plates, the fuel cell membrane electrode assembly and institute
It states bipolar plates to be arranged alternately along principal current direction, the diagnostic method is characterized in that, which comprises
S10 calculates the bipolar plates along the current value of the transverse current perpendicular to principal current direction flowing；
S20, if the current value is greater than preset threshold, judgement has abnormal fuel battery monomer, and executes S30；
S30, the flow direction of the plane according to the transverse current in the different bipolar plates in the bipolar plates, determines institute
State the position of abnormal fuel battery monomer.
2. fuel cell pile method for diagnosing faults as described in claim 1, which is characterized in that the step S10 includes:
S100 detects the potential difference at the both ends of the bipolar plates perpendicular to the principal current direction；
S200, the current value based on transverse current described in the potential difference and the bipolar plates resistance calculations.
3. fuel cell pile method for diagnosing faults as claimed in claim 2, which is characterized in that each bipolar plates are vertical
It include opposite first end and second end in the principal current direction, the S100 includes:
The potential definition for being located at the most marginal bipolar plates of the fuel cell pile is basic potential by S110；
S120 detects the first potential difference between the first end of the every two adjacent bipolar plates, passes through the basis
Potential and first potential difference obtain each described bipolar plates in the first potential of the first end；
S130 detects the second potential difference of the second end between the every two adjacent bipolar plates, passes through the basis
Potential and second potential difference obtain each described bipolar plates in the second potential of the second end；
S140 obtains the potential difference of the bipolar plates by the first potential and the second potential of the same bipolar plates.
4. fuel cell pile method for diagnosing faults as claimed in claim 3, which is characterized in that by being set to the fuel
The voltage polling at battery stack both ends obtains first potential difference and second potential difference.
5. fuel cell pile method for diagnosing faults as claimed in claim 2, which is characterized in that in the step S200,
The bipolar plates resistance is by the conductivity of the bipolar plates, the length of the bipolar plates, the height of the bipolar plates and described
Bipolar plates THICKNESS CALCULATION obtains.
6. fuel cell pile method for diagnosing faults as described in claim 1, which is characterized in that if the current value is not more than
The preset value then judges that the fuel cell pile is in normal condition.
7. fuel cell pile method for diagnosing faults as described in claim 1, which is characterized in that in the S30, if all institutes
It is identical to state flowing to for the transverse current in bipolar plates, then the abnormal fuel battery monomer is located at the principal current direction institute
State at least one end in the both ends of fuel cell pile.
8. fuel cell pile method for diagnosing faults as described in claim 1, which is characterized in that in the S30, if described double
Flowing to for the transverse current in pole plate is not exactly the same, then the abnormal fuel battery monomer is located at two transverse current streams
To between the opposite bipolar plates.
9. fuel cell pile method for diagnosing faults as claimed in claim 8, which is characterized in that after the step S30 also
Further comprise:
S40, the flow direction of the plane according to the transverse current in the different bipolar plates in the bipolar plates, determines institute
State the position of abnormal fuel battery monomer current convergence.
10. fuel cell pile method for diagnosing faults as claimed in claim 9, which is characterized in that the abnormal fuel battery
The position of monolithic current convergence includes cathode inlet, cathode outlet and anode inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639624.2A CN109828209A (en) | 2018-12-29 | 2018-12-29 | Fuel cell pile method for diagnosing faults |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639624.2A CN109828209A (en) | 2018-12-29 | 2018-12-29 | Fuel cell pile method for diagnosing faults |
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| CN109828209A true CN109828209A (en) | 2019-05-31 |
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| CN201811639624.2A Pending CN109828209A (en) | 2018-12-29 | 2018-12-29 | Fuel cell pile method for diagnosing faults |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482599A (en) * | 2008-07-04 | 2009-07-15 | 清华大学 | Current distribution measuring method and apparatus for fuel cell |
| CN101933186A (en) * | 2008-01-30 | 2010-12-29 | 丰田自动车株式会社 | Fuel cell system |
| CN107407707A (en) * | 2015-03-11 | 2017-11-28 | 松下知识产权经营株式会社 | Abnormal detector |
| CN107611457A (en) * | 2017-08-31 | 2018-01-19 | 上海汽车集团股份有限公司 | A kind of fuel cell and its minus plate |
| CN108172870A (en) * | 2017-12-28 | 2018-06-15 | 上海神力科技有限公司 | It is a kind of for the deficency detection device of fuel cell and deficency detection method |
-
2018
- 2018-12-29 CN CN201811639624.2A patent/CN109828209A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101933186A (en) * | 2008-01-30 | 2010-12-29 | 丰田自动车株式会社 | Fuel cell system |
| CN101482599A (en) * | 2008-07-04 | 2009-07-15 | 清华大学 | Current distribution measuring method and apparatus for fuel cell |
| CN107407707A (en) * | 2015-03-11 | 2017-11-28 | 松下知识产权经营株式会社 | Abnormal detector |
| CN107611457A (en) * | 2017-08-31 | 2018-01-19 | 上海汽车集团股份有限公司 | A kind of fuel cell and its minus plate |
| CN108172870A (en) * | 2017-12-28 | 2018-06-15 | 上海神力科技有限公司 | It is a kind of for the deficency detection device of fuel cell and deficency detection method |
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