CN113642265B - Method and device for evaluating flow of fuel cell short stack fluid - Google Patents
Method and device for evaluating flow of fuel cell short stack fluid Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 184
- 239000012530 fluid Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims description 20
- 238000011156 evaluation Methods 0.000 claims abstract description 98
- 239000003570 air Substances 0.000 claims description 142
- 239000001257 hydrogen Substances 0.000 claims description 142
- 229910052739 hydrogen Inorganic materials 0.000 claims description 142
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 140
- 239000000110 cooling liquid Substances 0.000 claims description 115
- 230000003068 static effect Effects 0.000 claims description 78
- 239000002826 coolant Substances 0.000 claims description 36
- 239000012528 membrane Substances 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 8
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 101100353517 Caenorhabditis elegans pas-2 gene Proteins 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 101100245267 Caenorhabditis elegans pas-1 gene Proteins 0.000 description 1
- 101100028900 Caenorhabditis elegans pcs-1 gene Proteins 0.000 description 1
- 101001076732 Homo sapiens RNA-binding protein 27 Proteins 0.000 description 1
- 102100025873 RNA-binding protein 27 Human genes 0.000 description 1
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1007—Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
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- G06F2113/00—Details relating to the application field
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- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention relates to the technical field of fuel cells, in particular to a fuel cell short stack fluid flow evaluation method and a fuel cell short stack fluid flow evaluation device.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell short stack fluid flow evaluation method and device.
Background
In the development process of the fuel cell, after the bipolar plate, the membrane electrode and the sealing scheme are completed, if only parts such as the bipolar plate, the membrane electrode and the sealing gasket are manufactured to assemble the electric pile, when the flow resistance of air, hydrogen and cooling liquid flow fields of the electric pile is too large, the electric pile cannot be matched with proper parts such as an air compressor, a hydrogen circulating pump and a water pump, and the flow of three cavities (including air, hydrogen and cooling liquid) of the bipolar plate is reasonable and does not represent the reasonable flow of the three cavities of the electric pile.
How to judge the flow rationality of the short stack is a technical problem to be solved at present.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a fuel cell short stack fluid flow evaluation method and apparatus that overcomes or at least partially solves the above problems
In a first aspect, the present invention provides a fuel cell short stack fluid flow evaluation method, comprising:
acquiring multiple dimensional information of air, hydrogen and cooling liquid of a fuel cell short stack;
and obtaining an evaluation grading result of the fuel cell short stack based on the air, the hydrogen and the multiple dimensional information of the cooling liquid of the fuel cell short stack.
Further, the acquiring the multiple dimensional information of the air, the hydrogen and the cooling liquid of the short stack of the fuel cell includes:
establishing a computational fluid dynamics model for the fuel cell short stack;
acquiring import and export boundary data for the computational fluid dynamics model;
and acquiring a plurality of dimensional information of air, hydrogen and cooling liquid of the fuel cell short stack based on the computational fluid dynamics model and the inlet-outlet boundary data.
Further, the multiple dimensional information of the air, hydrogen and coolant of the fuel cell short stack includes at least the first three of:
The total air inlet and outlet pressure drop, the total hydrogen inlet and outlet pressure drop and the total cooling liquid inlet and outlet pressure drop of the fuel cell short stack, wherein the unevenness of air flow, the unevenness of hydrogen flow and the unevenness of cooling liquid flow flowing through each group of bipolar plates in the fuel cell short stack, the unevenness of the total air inlet and outlet pressure difference, the unevenness of the total hydrogen inlet and outlet pressure difference and the unevenness of the total cooling liquid inlet and outlet pressure difference of each group of bipolar plates in the fuel cell short stack, the total air pressure drop ratio, the total hydrogen pressure drop ratio and the total cooling liquid pressure drop ratio of the bipolar plates in the fuel cell short stack, the total air inlet pressure variance, the total hydrogen pressure variance and the total cooling liquid pressure variance of bipolar plates in the fuel cell short stack, and the total air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference of inlets of bipolar plates in the fuel cell short stack;
wherein the fuel cell comprises a plurality of single cells, each single cell comprises a group of bipolar plates and membrane electrodes positioned in the middle of the bipolar plates, and the short stack comprises a plurality of groups of bipolar plates and membrane electrodes positioned between the groups of bipolar plates.
Further, the obtaining the evaluation and grading result of the fuel cell short stack based on the multiple dimensional information of the air, the hydrogen and the cooling liquid of the fuel cell short stack includes:
judging whether the total pressure drop of an air inlet and an air outlet of the short stack of the fuel cell, the total pressure drop of a hydrogen inlet and an air outlet and the total pressure drop of a cooling liquid inlet and an outlet all meet a first preset value corresponding to the total pressure drop of the air inlet and the total pressure drop of the hydrogen inlet and the outlet and the total pressure drop of the cooling liquid outlet, and obtaining a first judging result;
judging whether the non-uniformity of the air flow, the non-uniformity of the hydrogen flow and the non-uniformity of the coolant flow of each group of bipolar plates in the fuel cell short stack all meet a second preset value corresponding to the non-uniformity of the hydrogen flow and the non-uniformity of the coolant flow, and obtaining a second judgment result;
judging whether the total pressure difference unevenness of the air inlet and outlet of each group of bipolar plates, the total pressure difference unevenness of the hydrogen inlet and outlet and the total pressure difference unevenness of the cooling liquid inlet and outlet in the fuel cell short stack all meet a third preset value corresponding to the total pressure difference unevenness of the hydrogen inlet and outlet and obtaining a third judging result;
and determining a first evaluation grading result of the fuel cell short stack based on the first judgment result, the second judgment result and the third judgment result.
Further, the obtaining a first evaluation grading result of the fuel cell short stack based on the first, second, and third judgment results includes:
When the first judging result, the second judging result and the third judging result are all yes, determining that the first evaluation grading result of the fuel cell short stack is qualified;
and when any one of the first judgment result, the second judgment result and the third judgment result is negative, determining that the first evaluation classification result of the fuel cell short stack is unqualified.
Further, the obtaining the evaluation and grading result of the fuel cell short stack based on the multiple dimensional information of the air, the hydrogen and the cooling liquid of the fuel cell short stack includes:
judging whether the total air pressure drop ratio, the total hydrogen pressure drop ratio and the total cooling liquid pressure drop ratio of each group of bipolar plates in the fuel cell short stack meet corresponding fourth preset values or not, and obtaining a fourth judgment result;
judging whether the air total pressure variance, the hydrogen total pressure variance and the cooling liquid total pressure variance of each group of bipolar plate inlets in the fuel cell short stack meet corresponding fifth preset values or not, and obtaining a fifth judging result;
judging whether the air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference of each group of bipolar plate inlets and outlets in the fuel cell short stack meet a corresponding sixth preset value or not, and obtaining a sixth judging result;
Judging whether the air static pressure limit, the hydrogen static pressure limit and the cooling liquid static pressure limit of each group of bipolar plate inlets in the fuel cell short stack meet corresponding seventh preset values or not, and obtaining a seventh judgment result;
and obtaining a second evaluation grading result of the fuel cell short stack based on the first evaluation grading result and the fourth to seventh judgment results.
Further, the obtaining a second evaluation grading result of the fuel cell short stack based on the first evaluation grading result and the fourth to seventh judgment results includes:
when the first evaluation and grading result is qualified and the fourth judgment result to the seventh judgment result are all yes, determining that the second evaluation and grading result of the fuel cell short stack is excellent;
and when the first evaluation and grading result is qualified and any one of the fourth judgment result to the seventh judgment result is negative, obtaining a second evaluation and grading result of the fuel cell short stack as good.
In a second aspect, the present invention also provides a fuel cell short stack fluid flow evaluation device, including:
the acquisition module is used for acquiring a plurality of dimensional information of air, hydrogen and cooling liquid of the fuel cell short stack;
And the obtaining module is used for obtaining the evaluation grading result of the fuel cell short stack based on the multiple dimensional information of the air, the hydrogen and the cooling liquid of the fuel cell short stack.
In a third aspect, the invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method steps described in the first aspect when executing the program.
In a fourth aspect, the invention also provides a computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method steps described in the first aspect.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
the invention provides a fuel cell short stack fluid flow evaluation method which comprises the steps of obtaining multiple dimensional information of air, hydrogen and cooling liquid of a fuel cell short stack, obtaining an evaluation classification result of the fuel cell short stack based on the multiple dimensional information, further obtaining the evaluation classification result of the fuel cell short stack through analyzing pressure drop and flow uniformity of the air, the hydrogen and the cooling liquid of the fuel cell short stack, and optimizing the structure of a bipolar plate in time when the evaluation classification result is unqualified according to the evaluation classification result, so that the electric stack can be better matched with a proper air compressor, a hydrogen circulating pump and a water pump, and the production efficiency is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also throughout the drawings, like reference numerals are used to designate like parts. In the drawings:
FIG. 1 is a schematic flow chart of the steps of a fuel cell short stack fluid flow evaluation method in an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating non-uniformity in coolant flow through each set of bipolar plates in a short stack in an embodiment of the present invention;
FIG. 3 is a schematic diagram of the total differential pressure non-uniformity of bipolar plate coolant in a short stack in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram showing the structure of a fuel cell short stack fluid flow evaluation device in an embodiment of the invention;
fig. 5 shows a schematic structural diagram of a computer device for implementing a fuel cell short stack fluid flow evaluation method in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example 1
The embodiment of the invention provides a fuel cell short stack fluid flow evaluation method which is applied to a fuel cell stack, wherein the fuel cell stack comprises a plurality of groups of bipolar plates, membrane electrodes between each group of bipolar plates, the fuel cell stack is formed by stacking and combining a plurality of single cells in a serial mode, a bipolar plate and a membrane electrode prosthesis are overlapped, sealing elements are embedded between the single cells, and the fuel cell stack is formed by fastening the single cells by screw rods or steel belts after the front end plate and the rear end plate are pressed.
The electric pile is the core part of the fuel cell power system, when the electric pile works, air and hydrogen are respectively introduced from inlets, distributed to the bipolar plates of the single cells through the electric pile gas main channel, uniformly distributed to electrodes through the bipolar plates in a diversion way, and contacted with a catalyst through the electrode support body to carry out electrochemical reaction. In the development process of the electric pile, a plurality of single cells are taken to form a short pile, and the trial production failure probability of the whole pile can be reduced by researching the related performance of the short pile. The fuel cell short stack fluid flow evaluation method is established, so that the whole stack fluid flow is more reasonable.
The fuel cell short stack fluid flow evaluation method, as shown in fig. 1, includes:
s101, acquiring multiple dimensional information of air, hydrogen and cooling liquid of a short stack of the fuel cell;
S102, obtaining an evaluation grading result of the fuel cell short stack based on the plurality of dimensional information of the air, the hydrogen and the cooling liquid of the fuel cell short stack.
In S101, acquiring multiple dimensional information of air, hydrogen and coolant of the short stack of the fuel cell includes:
establishing a computational fluid dynamics model for the fuel cell short stack; acquiring import and export boundary data for the computational fluid dynamics model; based on the computational fluid dynamics model and the inlet-outlet boundary data, multiple dimensional information of air, hydrogen and cooling liquid of the fuel cell short stack is obtained.
In an alternative embodiment, a three-dimensional model is first built for the short stack, which is used to make a computational fluid dynamics model (CFD), thereby yielding a computational fluid dynamics model of the fuel cell. Inlet and outlet boundary data for the computational fluid dynamics model is obtained, and the boundary data may specifically be inlet flow and outlet pressure boundaries of air, hydrogen and cooling liquid, but may also be other suitable boundaries, and is not limited herein.
Then, based on the computational fluid dynamics model and the import-export boundary data, the multiple dimensional information of air, hydrogen and cooling liquid of the fuel cell short stack is obtained.
Wherein the plurality of dimensional information includes at least the first three of:
the total air inlet and outlet pressure drop, the total hydrogen inlet and outlet pressure drop and the total cooling liquid inlet and outlet pressure drop (parameter 1) of the fuel cell short stack, the air flow unevenness of each group of bipolar plates in the fuel cell short stack, the hydrogen flow unevenness, the cooling liquid flow unevenness (parameter 2), the total air inlet and outlet pressure difference unevenness of each group of bipolar plates in the fuel cell short stack, the total hydrogen inlet and outlet pressure difference unevenness, the cooling liquid inlet and outlet pressure difference unevenness (parameter 3), the total air pressure drop ratio of each group of bipolar plates in the fuel cell short stack, the total hydrogen pressure drop ratio, the total cooling liquid pressure drop ratio (parameter 4), the total air pressure variance, the total hydrogen pressure variance and the cooling liquid total pressure variance (parameter 5) of each group of bipolar plates in the fuel cell short stack, the air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference (parameter 6) of each group of bipolar plates in the fuel cell short stack, and the total air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference (parameter 7) of each group of bipolar plates in the fuel cell short stack.
For the parameter 1, firstly, according to inlet-outlet boundary data, calculating and obtaining the total air inlet pressure Pai, the total air outlet pressure Pae, the total hydrogen inlet pressure Phi, the total hydrogen outlet pressure Phe, the total cooling liquid inlet pressure Pci and the total cooling liquid outlet pressure Pce of the short stack inlet and outlet by utilizing the computational fluid dynamics model; thus, the total pressure drop Pa=Pai-Pae of the air inlet and outlet; total hydrogen inlet and outlet pressure drop ph=phi-Phe; total pressure drop of coolant inlet and outlet = Pc = pp-pp.
For example, using computational fluid dynamics, the total short stack coolant inlet pressure, pci=14.85 KPa, and the total coolant outlet pressure, pce=0 KPa, are calculated. The short stack total coolant pressure drop pc=sci-pce=14.85-0=14.85 KPa.
For the parameter 2, firstly, according to the inlet-outlet boundary data, calculating to obtain the air flow Qai flowing through each group of bipolar plates in the short stack (determining that n groups of bipolar plates exist in the short stack) by using a computational fluid mechanics model, calculating to obtain the hydrogen flow Qhi flowing through each group of bipolar plates in the short stack, and calculating to obtain the cooling fluid flow Qci flowing through each group of bipolar plates in the short stack.
Next, the average flow rate QVa = (qa1+qa2+ … + Qan)/n of air flowing through the bipolar plate in the short stack is calculated, the average flow rate QVh = (qh1+qh2+ … + Qhn)/n of hydrogen flowing through the bipolar plate in the short stack is calculated, and the average flow rate QVc = (qc1+qc2+ … + Qcn)/n of coolant flowing through the bipolar plate in the short stack is calculated.
Finally, the air flow non-uniformity Uai = (Qai-QVa)/Qai 100% across each set of bipolar plates in the short stack was calculated. Calculating the unevenness of the hydrogen flow flowing through each group of bipolar plates in the short stack: uhi= (Qhi-QVh)/Qhi x 100%. Calculating the flow non-uniformity of the cooling liquid flowing through each group of bipolar plates in the short stack: uci = (Qci-QVc)/Qci 100%.
For example, the average flow rate QVc = (qc1+qc2+ … … +qc20)/20= 0.00382kg/s of the cooling liquid of the bipolar plate is calculated; calculating the flow non-uniformity Uci = (Qci-QVc)/Qci of the cooling liquid flowing through each bipolar plate; the non-uniformity of the flow of coolant through each set of bipolar plates in the short stack is shown in fig. 2. The values of the factors are more, and the specific process is not repeated.
For the parameter 3, firstly, calculating to obtain the total air inlet pressure Pasci flowing through each group of bipolar plates in the short stack by using a computational fluid dynamics model according to inlet-outlet boundary data; calculating to obtain the total pressure Phsci of the hydrogen inlet flowing through each group of bipolar plates in the short stack, and the total pressure Phsei of the hydrogen outlet flowing through each group of bipolar plates; and calculating the total pressure Pcsci of the cooling liquid flowing through each group of bipolar plates in the short stack, and the total pressure Pcscei of the cooling liquid flowing through each group of bipolar plates.
Next, the total air pressure difference pasi=pasci-Pasei of each group of bipolar plates in the short stack is calculated, the total hydrogen pressure difference phsi=phsci-Phsei of each group of bipolar plates in the short stack is calculated, and the total coolant pressure difference pcsi=pcsci-Pcsei of each group of bipolar plates in the short stack is calculated.
Then, the air average total pressure difference PVa = (pas1+pas2+ … +pasn)/n of the bipolar plates in the short stack is calculated; calculating the hydrogen average total pressure difference PVh = (phs1+phs2+ … +phsn)/n of the bipolar plates in the short stack; the cooling fluid average total pressure difference pvc= (pcs1+phs2+ … +phsn)/n of the bipolar plates in the short stack was calculated.
Finally, calculating the non-uniformity Uat = (Pasi-PVa)/Pasi of the total pressure difference of the air inlet and outlet of each group of bipolar plates in the short stack; calculating the non-uniformity Uht = (Phsi-PVh)/Phsi of the total pressure difference of the hydrogen inlet and outlet of each bipolar plate in the short stack; the non-uniformity Uct = (Pcsi-PVc)/Pcsi of 100% of the total pressure difference of the inlet and outlet of the bipolar plate cooling liquid in each group of short stacks is calculated.
Calculating total pressure Pcsci of hydrogen gas inlet and total pressure Pcsci of cooling liquid outlet flowing through each group of bipolar plates in the short stack according to the obtained inlet-outlet boundary data by using a computational fluid dynamics method, wherein the total pressure difference Pcsci=Pcsci-Pcscei of the cooling liquid of each group of bipolar plates in the short stack; calculate bipolar plate air average total pressure differential PVa = (13.73+pas2+ … … +13.79)/20 = 13.73kPa in short stacks; the total differential pressure non-uniformity Uct = (Pcsi-PVc)/Pcsi of 100% for each set of bipolar plate coolant was calculated. The total pressure differential non-uniformity of bipolar plate cooling fluid in the short stack is shown in figure 3. The values of the factors are more, and the specific process is not repeated.
For the parameter 4, firstly, according to inlet-outlet boundary data, calculating to obtain the total air pressure drop delta Pvai of each group of bipolar plates in the short stack by using a computational fluid dynamics model, calculating to obtain the total hydrogen pressure drop delta Pvhi of each group of bipolar plates in the short stack, and calculating to obtain the total cooling liquid pressure drop delta Pvci of each group of bipolar plates in the short stack.
Next, the bipolar plate air average total pressure drop Δpva= (Δpva1+Δpva2+ … +Δpvan)/n is calculated, the bipolar plate hydrogen average total pressure drop Δpvh= (Δpvh1+Δpvh2+ … +Δpvhn)/n is calculated, and the bipolar plate coolant average total pressure drop Δpvc= (Δpvc1+Δpvc2+ … +Δpvcn)/n is calculated.
Then, the total pressure drop Pa=Pai-Pae of the inlet and outlet air of the short stack is calculated, the total pressure drop Ph=phi-Phe of the inlet and outlet hydrogen of the short stack is calculated, and the total pressure drop Pc=Pci-Pce of the inlet and outlet cooling liquid of the short stack is calculated.
Finally, the total air pressure drop of the bipolar plates in the short stack is calculated to be equal to Ra=DeltaPva/Pa, the total hydrogen pressure drop of the bipolar plates in the short stack is calculated to be equal to Rh=DeltaPvh/Ph, and the total coolant pressure drop of the bipolar plates in the short stack is calculated to be equal to Rc=DeltaPvc/Pc.
For example, calculating the total pressure drop Δpvci of each group of bipolar plate cooling liquid in the short stack, if n=20, then 13.73KPa, … …, 13.79KPa in turn, and calculating the average total pressure drop Δpvc= (Δpvc1+pvc2+ … … Pvcn)/n= (13.73+13.73+ … … +13.79)/20=13.73 KPa of bipolar plate cooling liquid in the short stack; and calculating the total pressure drop Pc=Pci-Pce=14.85-0=14.85 KPa of the inlet and outlet cooling liquid of the short stack, wherein the total pressure drop of the bipolar plate cooling liquid in the short stack accounts for the ratio Rc= [ delta ] Pvc/Pc =100% =13.73/14.85 x 100% = 92.46%.
For the parameter 5, the total inlet air pressure Paii, the total inlet hydrogen pressure Phii and the total inlet cooling liquid pressure Pcii of each group of bipolar plates in the short stack are calculated by utilizing a computational fluid dynamics model according to inlet-outlet boundary data.
Next, the total pressure average value M (pa) = (pai1+pai2+ … +pain)/n of the inlet air of the bipolar plates in the short stack is calculated, the total pressure average value M (ph) = (Phi 1+phi2+ … +pain)/n of the inlet hydrogen of the bipolar plates in the short stack is calculated, and the total pressure average value M (pc) = (pci1+pci2+ … +pcin)/n of the inlet cooling liquid of the bipolar plates in the short stack is calculated.
Finally, the total pressure variance D (Pfa) = [ (Pai 1-M (pa)) 2 +(Pai2-M(pa)) 2 +…+(Pain-M(pa)) 2 ]Calculating the total pressure variance D (Pfh) = [ (Phi 1-M (ph)) 2 +(Phi2-M(ph)) 2 +…+(Phin-M(ph)) 2 ]Per n, calculate the total pressure variance D (Pfc) = [ (Pci 1-M (pc)) 2 +(Pci2-M(pc)) 2 +…+(Pcin-M(pc)) 2 ]/n。
For example, the total coolant inlet pressure Pcii of each group of bipolar plates in the short stack is calculated, the total pressure average value M (Pc) = (pc1+pc2+ … … +pcn)/n= (14.4+14.4+ … … +14.3)/20=14.34 KPa is calculated, and then the total pressure variance D (Pfc) = [ (Pc 1-M (Pc)) 2+ (Pc 2-M (Pc)) 2+ … … + (Pcn-M (Pc)) 2 ]/n=0.002 is calculated.
For the parameter 6, firstly, according to inlet-outlet boundary data, a computational fluid dynamics model is utilized to calculate the air static pressure differential Psjai of the bipolar plate in the short stack, calculate the hydrogen static pressure differential Psjhi of the bipolar plate in the short stack, and calculate the cooling liquid static pressure differential Psjci of the bipolar plate in the short stack.
Then, the cross section of each group of bipolar plates perpendicular to the flow channel direction is selected as a bipolar plate inlet, and the air inlet static pressure Psai of each group of bipolar plates, the hydrogen inlet static pressure Pshi of each group of bipolar plates and the cooling liquid inlet static pressure Psci of each group of bipolar plates are calculated.
And selecting a section of each group of fast-out bipolar plates perpendicular to the direction of the flow channel as a bipolar plate outlet, and calculating the static pressure Pvai of the air outlet of each group of bipolar plates, the static pressure Pvhi of the hydrogen outlet of each group of bipolar plates and the static pressure Pvci of the hydrogen outlet of each group of bipolar plates.
Finally, the air static pressure difference Psjai=Psai-Pvai of the inlet and outlet of each group of bipolar plates in the short stack is calculated, the hydrogen static pressure difference Psjhi=Pshi-Pvhi of the inlet and outlet of each group of bipolar plates in the short stack is calculated, and the cooling liquid static pressure difference Psjci=Psci-Pvci of the inlet and outlet of each group of bipolar plates in the short stack is calculated.
For example, calculating the static pressure of the cooling liquid inlet of each group of bipolar plates to be Psci, the static pressure of the cooling liquid outlet of each group of bipolar plates to be Pvci, and calculating the static pressure difference of the cooling liquid inlet and outlet of each group of bipolar plates in the short stack to be Psjci=Psci-Pvci, psjc1=13.94-0.21=13.73; psjc2=13.92-0.2=13.72; … …, psjc20=13.81-0.03=13.78. Too much data is taken and not listed in its entirety.
For parameter 7, firstly, according to inlet-outlet boundary data, using a computational fluid dynamics model, according to inlet static pressure of each bipolar plate air, pshi, hydrogen inlet static pressure of each bipolar plate, psci, cooling fluid inlet static pressure of each bipolar plate, selecting a maximum value Psai (max) of the inlet static pressure of one bipolar plate and a minimum value Psai (min) of the inlet static pressure of the other bipolar plate, selecting a maximum value Pshi (max) of the hydrogen inlet static pressure of one bipolar plate and a minimum value Pshi (min) of the hydrogen inlet static pressure of the other bipolar plate, and selecting a maximum value Psci (max) of the inlet static pressure of the cooling fluid of one bipolar plate and a minimum value Psci (min) of the outlet static pressure of the cooling fluid of the other bipolar plate.
Finally, calculating the bipolar plate aerostatic differential delta pea=psa (max) -psa (min) in the short stack; calculating the hydrogen static pressure range delta Peh=Pshi (max) -Pshi (min) of the bipolar plates in the short stack; the bipolar plate coolant hydrostatic head in the short stack Δ Pec =psci (max) -Psci (min) is calculated.
For each dimension information, three parameters are included, which correspond to parameters of air, hydrogen and cooling liquid, respectively, and for each parameter, a corresponding preset value is corresponding. The preset value is specifically formulated according to actual conditions.
For example, the bipolar plate coolant inlet static pressure Psc1, psc2, … … Psc20 of each group is calculated to find out that the maximum value Psc (max) =psc7=14.5 KPa and the minimum value Psc (min) =psc15=14.3 KPa, then the bipolar plate coolant inlet and outlet static pressure in the short stack is extremely poor by Δ Pec =psci (max) -Psci (min) =psc7-psc15=14.5-14.3=0.2 KPa. This result is referred to as a reference.
Therefore, S102 is performed to obtain an evaluation ranking result of the fuel cell short stack based on the plurality of dimensional information of the air, the hydrogen, and the coolant of the fuel cell short stack.
In an alternative implementation manner, judging whether the total pressure drop of an air inlet and an air outlet, the total pressure drop of a hydrogen inlet and an air outlet and the total pressure drop of a cooling liquid inlet and an air outlet of the fuel cell short stack all meet respective corresponding first preset values, obtaining a first judgment result, and judging whether the non-uniformity of air flow, the non-uniformity of hydrogen flow and the non-uniformity of cooling liquid flow of each group of bipolar plates in the fuel cell short stack meet second preset values, obtaining a second judgment result; judging whether the total pressure difference non-uniformity of the air inlet and outlet of each group of bipolar plates in the fuel cell short stack, the total pressure difference non-uniformity of the hydrogen inlet and outlet and the total pressure difference non-uniformity of the cooling liquid inlet and outlet meet a third preset value or not, and obtaining a third judging result; and obtaining a first evaluation grading result of the short fuel cell stack based on the first judgment result, the second judgment result and the third judgment result.
And when the first judgment result, the second judgment result and the third judgment result are all yes, obtaining a first evaluation grading result of the short fuel cell stack as qualified.
And when any one of the first judgment result, the second judgment result and the third judgment result is negative, obtaining a first evaluation grading result of the short fuel cell stack as unqualified.
For example, when the total pressure drop of the air inlet and the air outlet, the total pressure drop of the hydrogen inlet and the total pressure drop of the cooling liquid inlet and the cooling liquid outlet of the short stack of the fuel cell meet the respective corresponding first preset values; when the flow non-uniformity of air flow, the flow non-uniformity of hydrogen and the flow non-uniformity of cooling liquid of each group of bipolar plates in the short stack of the fuel cell meet the second corresponding preset values; and when the total pressure difference unevenness of the air inlet and outlet of each bipolar plate, the total pressure difference unevenness of the hydrogen inlet and outlet and the total pressure difference unevenness of the cooling liquid inlet and outlet in the fuel cell short stack meet the respective corresponding third preset values, determining that the first evaluation classification result of the fuel cell short stack is qualified. And obtaining the evaluation and grading result of the short pile according to the evaluation and grading result of the short pile.
Of course, if any one of the above parameter indexes does not satisfy the corresponding preset value, the evaluation and classification result of the corresponding short stack is failed, that is, the evaluation and classification result representing the short stack is failed.
In an alternative implementation manner, judging whether the total air pressure drop ratio, the total hydrogen pressure drop ratio and the total cooling liquid pressure drop ratio of each group of bipolar plates in the fuel cell short stack all meet respective corresponding fourth preset values or not to obtain a fourth judging result;
judging whether the air total pressure variance, the hydrogen total pressure variance and the cooling liquid total pressure variance of each group of bipolar plate inlets in the fuel cell short stack all meet the respective corresponding fifth preset values, and obtaining a fifth judgment result;
judging whether the air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference of each group of bipolar plate inlets and outlets in the fuel cell short stack all meet respective corresponding sixth preset values, and obtaining a sixth judging result;
judging whether the air static pressure limit, the hydrogen static pressure limit and the cooling liquid static pressure limit of each group of bipolar plate inlets in the fuel cell short stack all meet respective corresponding seventh preset values, and obtaining a seventh judgment result;
and obtaining a second evaluation grading result of the fuel cell short stack based on the first evaluation grading result and the fourth to seventh judgment results.
When the first evaluation and grading result is qualified and the fourth judgment result to the seventh judgment result are all yes, determining that the second evaluation and grading result of the fuel cell short stack is excellent;
And when the first evaluation and grading result is qualified and any one of the fourth judgment result to the seventh judgment result is negative, obtaining a second evaluation and grading result of the short fuel cell stack as good.
For example, when the first evaluation and classification result is qualified, and the air total pressure drop ratio, the hydrogen total pressure drop ratio and the cooling liquid total pressure drop ratio of each group of bipolar plates in the fuel cell short stack all meet respective corresponding fourth preset values, the air total pressure variance, the hydrogen total pressure variance and the cooling liquid total pressure variance of each group of bipolar plates in the fuel cell short stack all meet respective corresponding fifth preset values, the air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference of each group of bipolar plates in the fuel cell short stack all meet respective corresponding sixth preset values, and when the air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference of each group of bipolar plates in the fuel cell short stack all meet respective corresponding seventh preset values, the second evaluation and classification result of the fuel cell short stack is determined to be excellent. And obtaining the evaluation and grading result of the short pile according to the evaluation and grading result of the short pile.
Of course, if any of the above-mentioned parameter indexes does not satisfy the corresponding preset value, the evaluation and classification result of the corresponding short pile is good, that is, the evaluation and classification result representing the short pile is also good.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
the invention provides a fuel cell short stack fluid flow evaluation method which comprises the steps of obtaining multiple dimensional information of air, hydrogen and cooling liquid of a fuel cell short stack, obtaining an evaluation classification result of the fuel cell short stack based on the multiple dimensional information, further obtaining the evaluation classification result of the fuel cell short stack through analyzing pressure drop and flow uniformity of the air, the hydrogen and the cooling liquid of the fuel cell short stack, and optimizing the structure of a bipolar plate in time when the evaluation classification result is unqualified according to the evaluation classification result, so that the electric stack can be better matched with a proper air compressor, a hydrogen circulating pump and a water pump, and the production efficiency is improved.
Example two
Based on the same inventive concept, the embodiment of the invention also provides a fuel cell short stack fluid flow evaluation device, as shown in fig. 4, comprising:
an acquiring module 401, configured to acquire multiple dimensional information of air, hydrogen and a coolant of a short stack of fuel cells;
an obtaining module 402 is configured to obtain an evaluation and grading result of the short fuel cell stack based on the multiple dimensional information of the air, the hydrogen and the coolant of the short fuel cell stack.
In an alternative embodiment, the obtaining module 401 includes:
a model building unit for building a computational fluid dynamics model for the fuel cell short stack;
an acquisition unit configured to acquire import-export boundary data for the computational fluid dynamics model;
and the obtaining unit is used for obtaining a plurality of dimensional information of air, hydrogen and cooling liquid of the fuel cell short stack based on the computational fluid dynamics model and the inlet-outlet boundary data.
In an alternative embodiment, the multiple dimensional information of air, hydrogen and coolant of the fuel cell stack includes at least the first three of:
the total air inlet and outlet pressure drop, the total hydrogen inlet and outlet pressure drop and the total cooling liquid inlet and outlet pressure drop of the fuel cell short stack, wherein the unevenness of air flow, the unevenness of hydrogen flow and the unevenness of cooling liquid flow flowing through each group of bipolar plates in the fuel cell short stack, the unevenness of the total air inlet and outlet pressure difference, the unevenness of the total hydrogen inlet and outlet pressure difference and the unevenness of the total cooling liquid inlet and outlet pressure difference of each group of bipolar plates in the fuel cell short stack, the total air pressure drop ratio, the total hydrogen pressure drop ratio and the total cooling liquid pressure drop ratio of the bipolar plates in the fuel cell short stack, the total air inlet pressure variance, the total hydrogen pressure variance and the total cooling liquid pressure variance of bipolar plates in the fuel cell short stack, and the total air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference of inlets of bipolar plates in the fuel cell short stack;
Wherein the fuel cell comprises a plurality of single cells, each single cell comprises a group of bipolar plates and membrane electrodes positioned in the middle of the bipolar plates, and the short stack comprises a plurality of groups of bipolar plates and membrane electrodes positioned between the groups of bipolar plates.
In an alternative embodiment, the obtaining module 402 includes:
the first judging unit is used for judging whether the total pressure drop of the air inlet and outlet, the total pressure drop of the hydrogen inlet and outlet and the total pressure drop of the cooling liquid inlet and outlet of the fuel cell short stack all meet a first preset value corresponding to the total pressure drop of the air inlet and outlet and the total pressure drop of the hydrogen inlet and outlet and the total pressure drop of the cooling liquid inlet and outlet and obtaining a first judging result;
a second judging unit, configured to judge whether the non-uniformity of the air flow, the non-uniformity of the hydrogen flow, and the non-uniformity of the coolant flow of each group of bipolar plates in the short stack of fuel cells all meet a second preset value corresponding to the non-uniformity of the air flow, the non-uniformity of the hydrogen flow, and the non-uniformity of the coolant flow, so as to obtain a second judging result;
a third judging unit, configured to judge whether the total pressure difference non-uniformity of the air inlet and outlet of each group of bipolar plates in the short stack of fuel cells, the total pressure difference non-uniformity of the hydrogen inlet and outlet, and the total pressure difference non-uniformity of the coolant inlet and outlet all meet a third preset value corresponding to the total pressure difference non-uniformity, so as to obtain a third judging result;
And the first determining unit is used for determining a first evaluation grading result of the fuel cell short stack based on the first judging result, the second judging result and the third judging result.
In an alternative embodiment, the first determining unit comprises:
a first determining subunit, configured to determine that a first evaluation classification result of the short stack of fuel cells is qualified when the first determination result, the second determination result, and the third determination result are all yes;
and the second determining subunit is used for determining that the first evaluation classification result of the fuel cell short stack is unqualified when any one of the first judging result, the second judging result and the third judging result is negative.
In an alternative embodiment, the obtaining module 402 includes:
a fourth judging unit, configured to judge whether the air total pressure drop ratio, the hydrogen total pressure drop ratio, and the cooling liquid total pressure drop ratio of each group of bipolar plates in the short stack of the fuel cell meet corresponding fourth preset values, so as to obtain a fourth judging result;
a fifth judging unit, configured to judge whether the air total pressure variance, the hydrogen total pressure variance, and the coolant total pressure variance of each group of bipolar plate inlets in the fuel cell short stack meet corresponding fifth preset values, so as to obtain a fifth judging result;
A sixth judging unit, configured to judge whether the air static pressure difference, the hydrogen static pressure difference, and the cooling liquid static pressure difference of each group of bipolar plate inlets and outlets in the short stack of the fuel cell meet corresponding sixth preset values, so as to obtain a sixth judging result;
a seventh judging unit, configured to judge whether the air static pressure limit, the hydrogen static pressure limit, and the cooling liquid static pressure limit of each group of bipolar plate inlets in the short stack of the fuel cell meet corresponding seventh preset values, so as to obtain a seventh judging result;
and a second determining unit configured to determine a second evaluation ranking result of the fuel cell short stack based on the first evaluation ranking result and the fourth to seventh judgment results.
In an alternative embodiment, the second determining unit comprises:
a third determining subunit, configured to determine that, when the first evaluation classification result is qualified and the fourth judgment result to the seventh judgment result are all yes, the second evaluation classification result of the fuel cell short stack is optimal;
and a fourth determining subunit, configured to obtain a second evaluation and classification result of the short stack of fuel cells as good when the first evaluation and classification result is qualified and any one of the fourth to seventh judgment results is no.
Example III
Based on the same inventive concept, an embodiment of the present invention provides a computer device, as shown in fig. 5, including a memory 504, a processor 502, and a computer program stored in the memory 504 and capable of running on the processor 502, where the processor 502 implements the steps of the fuel cell short stack fluid flow evaluation method described above when executing the program.
Where in FIG. 5 a bus architecture (represented by bus 500), bus 500 may include any number of interconnected buses and bridges, with bus 500 linking together various circuits, including one or more processors, represented by processor 502, and memory, represented by memory 504. Bus 500 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be described further herein. Bus interface 506 provides an interface between bus 500 and receiver 501 and transmitter 503. The receiver 501 and the transmitter 503 may be the same element, i.e. a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 502 is responsible for managing the bus 500 and general processing, while the memory 504 may be used to store data used by the processor 502 in performing operations.
Example IV
Based on the same inventive concept, a fourth embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the fuel cell short stack fluid flow evaluation method described above.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general-purpose systems may also be used with the teachings herein. The required structure for a construction of such a system is apparent from the description above. In addition, the present invention is not directed to any particular programming language. It will be appreciated that the teachings of the present invention described herein may be implemented in a variety of programming languages, and the above description of specific languages is provided for disclosure of enablement and best mode of the present invention.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.
Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in a fuel cell short stack fluid flow evaluation device, computer device, according to an embodiment of the invention. The present invention can also be implemented as an apparatus or device program (e.g., a computer program and a computer program product) for performing a portion or all of the methods described herein. Such a program embodying the present invention may be stored on a computer readable medium, or may have the form of one or more signals. Such signals may be downloaded from an internet website, provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
Claims (6)
1. A fuel cell short stack fluid flow evaluation method, comprising:
acquiring multiple dimensional information of air, hydrogen and cooling liquid of a fuel cell short stack;
based on the air, hydrogen and multiple dimensional information of the cooling liquid of the fuel cell short stack, obtaining an evaluation grading result of the fuel cell short stack;
the step of obtaining the evaluation and grading result of the fuel cell short stack based on the multiple dimensional information of the air, the hydrogen and the cooling liquid of the fuel cell short stack comprises the following steps:
judging whether the total pressure drop of an air inlet and an air outlet of the short stack of the fuel cell, the total pressure drop of a hydrogen inlet and an air outlet and the total pressure drop of a cooling liquid inlet and an outlet all meet a first preset value corresponding to the total pressure drop of the air inlet and the total pressure drop of the hydrogen inlet and the outlet and the total pressure drop of the cooling liquid outlet, and obtaining a first judging result;
judging whether the non-uniformity of the air flow, the non-uniformity of the hydrogen flow and the non-uniformity of the coolant flow of each group of bipolar plates in the fuel cell short stack all meet a second preset value corresponding to the non-uniformity of the hydrogen flow and the non-uniformity of the coolant flow, and obtaining a second judgment result;
judging whether the total pressure difference unevenness of the air inlet and outlet of each group of bipolar plates, the total pressure difference unevenness of the hydrogen inlet and outlet and the total pressure difference unevenness of the cooling liquid inlet and outlet in the fuel cell short stack all meet a third preset value corresponding to the total pressure difference unevenness of the hydrogen inlet and outlet and obtaining a third judging result;
When the first judging result, the second judging result and the third judging result are all yes, determining that the first evaluation grading result of the fuel cell short stack is qualified;
when any one of the first judgment result, the second judgment result and the third judgment result is negative, determining that the first evaluation classification result of the fuel cell short stack is unqualified; judging whether the total air pressure drop ratio, the total hydrogen pressure drop ratio and the total cooling liquid pressure drop ratio of each group of bipolar plates in the fuel cell short stack meet corresponding fourth preset values or not, and obtaining a fourth judgment result;
judging whether the air total pressure variance, the hydrogen total pressure variance and the cooling liquid total pressure variance of each group of bipolar plate inlets in the fuel cell short stack meet corresponding fifth preset values or not, and obtaining a fifth judging result;
judging whether the air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference of each group of bipolar plate inlets and outlets in the fuel cell short stack meet a corresponding sixth preset value or not, and obtaining a sixth judging result;
judging whether the air static pressure limit, the hydrogen static pressure limit and the cooling liquid static pressure limit of each group of bipolar plate inlets in the fuel cell short stack meet corresponding seventh preset values or not, and obtaining a seventh judgment result;
Obtaining a second evaluation grading result of the fuel cell short stack based on the first evaluation grading result and the fourth to seventh judgment results;
the obtaining a second evaluation grading result of the fuel cell short stack based on the first evaluation grading result and the fourth to seventh judgment results includes:
when the first evaluation and grading result is qualified and the fourth judgment result to the seventh judgment result are all yes, determining that the second evaluation and grading result of the fuel cell short stack is excellent;
and when the first evaluation and grading result is qualified and any one of the fourth judgment result to the seventh judgment result is negative, obtaining a second evaluation and grading result of the fuel cell short stack as good.
2. The method of claim 1, wherein the acquiring the multiple dimensional information of the air, hydrogen, and coolant of the short stack of fuel cells comprises:
establishing a computational fluid dynamics model for the fuel cell short stack;
acquiring import and export boundary data for the computational fluid dynamics model;
and acquiring a plurality of dimensional information of air, hydrogen and cooling liquid of the fuel cell short stack based on the computational fluid dynamics model and the inlet-outlet boundary data.
3. The method of claim 1, wherein the plurality of dimensional information of air, hydrogen, and coolant of the short stack of fuel cells comprises at least the first three of:
the total air inlet and outlet pressure drop, the total hydrogen inlet and outlet pressure drop and the total cooling liquid inlet and outlet pressure drop of the fuel cell short stack, wherein the unevenness of air flow, the unevenness of hydrogen flow and the unevenness of cooling liquid flow flowing through each group of bipolar plates in the fuel cell short stack, the unevenness of the total air inlet and outlet pressure difference, the unevenness of the total hydrogen inlet and outlet pressure difference and the unevenness of the total cooling liquid inlet and outlet pressure difference of each group of bipolar plates in the fuel cell short stack, the total air pressure drop ratio, the total hydrogen pressure drop ratio and the total cooling liquid pressure drop ratio of the bipolar plates in the fuel cell short stack, the total air inlet pressure variance, the total hydrogen pressure variance and the total cooling liquid pressure variance of bipolar plates in the fuel cell short stack, and the total air static pressure difference, the hydrogen static pressure difference and the cooling liquid static pressure difference of inlets of bipolar plates in the fuel cell short stack;
Wherein the fuel cell comprises a plurality of single cells, each single cell comprises a group of bipolar plates and membrane electrodes positioned in the middle of the bipolar plates, and the short stack comprises a plurality of groups of bipolar plates and membrane electrodes positioned between the groups of bipolar plates.
4. A fuel cell short stack fluid flow evaluation device, comprising:
the acquisition module is used for acquiring a plurality of dimensional information of air, hydrogen and cooling liquid of the fuel cell short stack;
the obtaining module is used for obtaining an evaluation grading result of the fuel cell short stack based on the multiple dimensional information of the air, the hydrogen and the cooling liquid of the fuel cell short stack;
the obtaining module further includes:
the first judging unit is used for judging whether the total pressure drop of the air inlet and outlet, the total pressure drop of the hydrogen inlet and outlet and the total pressure drop of the cooling liquid inlet and outlet of the fuel cell short stack all meet a first preset value corresponding to the total pressure drop of the air inlet and outlet and the total pressure drop of the hydrogen inlet and outlet and the total pressure drop of the cooling liquid inlet and outlet and obtaining a first judging result;
a second judging unit, configured to judge whether the non-uniformity of the air flow, the non-uniformity of the hydrogen flow, and the non-uniformity of the coolant flow of each group of bipolar plates in the short stack of fuel cells all meet a second preset value corresponding to the non-uniformity of the air flow, the non-uniformity of the hydrogen flow, and the non-uniformity of the coolant flow, so as to obtain a second judging result;
A third judging unit, configured to judge whether the total pressure difference non-uniformity of the air inlet and outlet of each group of bipolar plates in the short stack of fuel cells, the total pressure difference non-uniformity of the hydrogen inlet and outlet, and the total pressure difference non-uniformity of the coolant inlet and outlet all meet a third preset value corresponding to the total pressure difference non-uniformity, so as to obtain a third judging result;
a first determining unit configured to determine a first evaluation classification result of the fuel cell short stack based on the first determination result, the second determination result, and the third determination result;
the first determination unit includes:
a first determining subunit, configured to determine that a first evaluation classification result of the short stack of fuel cells is qualified when the first determination result, the second determination result, and the third determination result are all yes;
the second determining subunit is configured to determine that a first evaluation classification result of the short stack of fuel cells is not qualified when any one of the first determination result, the second determination result, and the third determination result is negative;
a fourth judging unit, configured to judge whether the air total pressure drop ratio, the hydrogen total pressure drop ratio, and the cooling liquid total pressure drop ratio of each group of bipolar plates in the short stack of the fuel cell meet corresponding fourth preset values, so as to obtain a fourth judging result;
A fifth judging unit, configured to judge whether the air total pressure variance, the hydrogen total pressure variance, and the coolant total pressure variance of each group of bipolar plate inlets in the fuel cell short stack meet corresponding fifth preset values, so as to obtain a fifth judging result;
a sixth judging unit, configured to judge whether the air static pressure difference, the hydrogen static pressure difference, and the cooling liquid static pressure difference of each group of bipolar plate inlets and outlets in the short stack of the fuel cell meet corresponding sixth preset values, so as to obtain a sixth judging result;
a seventh judging unit, configured to judge whether the air static pressure limit, the hydrogen static pressure limit, and the cooling liquid static pressure limit of each group of bipolar plate inlets in the short stack of the fuel cell meet corresponding seventh preset values, so as to obtain a seventh judging result;
a second determining unit configured to determine a second evaluation ranking result of the fuel cell short stack based on the first evaluation ranking result and the fourth to seventh judgment results;
the second determination unit includes:
a third determining subunit, configured to determine that, when the first evaluation classification result is qualified and the fourth judgment result to the seventh judgment result are all yes, the second evaluation classification result of the fuel cell short stack is optimal;
And a fourth determining subunit, configured to obtain a second evaluation and classification result of the short stack of fuel cells as good when the first evaluation and classification result is qualified and any one of the fourth to seventh judgment results is no.
5. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method steps of any of claims 1-3 when the program is executed.
6. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method steps of any of claims 1-3.
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