CN114464863B - Distribution manifold and fuel cell - Google Patents
Distribution manifold and fuel cell Download PDFInfo
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- CN114464863B CN114464863B CN202111172293.8A CN202111172293A CN114464863B CN 114464863 B CN114464863 B CN 114464863B CN 202111172293 A CN202111172293 A CN 202111172293A CN 114464863 B CN114464863 B CN 114464863B
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- 239000000446 fuel Substances 0.000 title claims abstract description 42
- 230000006978 adaptation Effects 0.000 claims abstract description 81
- 210000001503 joint Anatomy 0.000 claims abstract description 78
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 239000000110 cooling liquid Substances 0.000 claims description 26
- 239000001257 hydrogen Substances 0.000 claims description 26
- 229910052739 hydrogen Inorganic materials 0.000 claims description 26
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 6
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- 238000003032 molecular docking Methods 0.000 description 29
- 239000007789 gas Substances 0.000 description 17
- 230000013011 mating Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000004734 Polyphenylene sulfide Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 description 4
- 239000004954 Polyphthalamide Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 229920006375 polyphtalamide Polymers 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- UQMRAFJOBWOFNS-UHFFFAOYSA-N butyl 2-(2,4-dichlorophenoxy)acetate Chemical compound CCCCOC(=O)COC1=CC=C(Cl)C=C1Cl UQMRAFJOBWOFNS-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/249—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a distribution manifold and a fuel cell, which solve the problem of uniformity of fluid distribution in the pile integration process. The distribution manifold comprises an intake adaptation module and an exhaust adaptation module; distribution channels are arranged in the air inlet adaptation module and the air outlet adaptation module; the distribution channel comprises a butt-joint flow channel, a main flow channel and more than two split flow channels which are communicated, and a pile butt joint interface of the split flow channels is used for communicating a fluid port of a pile of the fuel cell; the air inlet adaptation module and the air outlet adaptation module are respectively provided with a first butt joint surface and a second butt joint surface which are oppositely arranged, and all pile butt joints of the distribution channel are distributed on the first butt joint surface and the second butt joint surface. The distribution manifold comprises an air inlet adaptation module and an air outlet adaptation module, and the design of the two module units reduces the manufacturing difficulty, so that the production cost is reduced; the effective lengths of the shunt channels are consistent, and the problem of uniformity of fluid distribution in the pile integration process is solved, so that the pile integration consistency is improved.
Description
Technical Field
The application belongs to the technical field of fuel cells, and particularly relates to a distribution manifold and a fuel cell.
Background
The fuel cell electric automobile is considered as one of the most important development technical routes of new energy automobiles due to the advantages of long driving range, convenient fuel filling, performance similar to the traditional automobiles and the like.
The electric pile is a place where electrochemical reaction occurs, and is also a core part of a fuel cell power system, and is formed by stacking and combining a plurality of single cells in series. The bipolar plates and the membrane electrodes are alternately overlapped, sealing elements are embedded between the monomers, and the sealing elements are tightly pressed by the air inlet end plate and the blind end plate and then fastened by fastening pieces, so that the fuel cell stack is formed. When the electric pile works, hydrogen and oxygen are respectively introduced from the inlet, distributed to the bipolar plates of the single cells through the electric pile gas main channel, uniformly distributed to the membrane electrode through the flow guide of the bipolar plates, and subjected to electrochemical reaction through the contact of the membrane electrode support body and the catalyst.
The number of individual cells connected in series by a single stack is limited because, when stacked, once a certain number is exceeded, the following problems occur: 1) The distribution is uneven, so that the last batteries are not fully utilized; 2) The single cell inconsistency, which causes the occurrence of excessive single cell voltage deviation; 3) Uneven heat dissipation causes overheating of the middle single-cell.
To solve the above problems, a fuel cell currently adopts a scheme in which a plurality of stacks are integrated. That is, a fuel cell of greater power is composed of a plurality of stacks of lesser power. In order to ensure effective output power of the higher power fuel cell, it is necessary to ensure sufficient reaction inside each stack, which requires uniform gas distribution for each stack.
The distribution manifold of the existing multi-stack integrated fuel cell has the technical problems of poor distribution uniformity and cooling liquid uniformity, thereby restricting the development and application of the multi-stack integrated fuel cell.
Disclosure of Invention
In order to solve the technical problems, the invention provides a distribution manifold and a fuel cell, which can solve the problem of uniformity of fluid distribution in the pile integration process, thereby improving the pile integration consistency.
The technical scheme adopted for achieving the purpose of the invention is that the distribution manifold comprises an air inlet adaptation module and an air outlet adaptation module; distribution channels are arranged in the air inlet adaptation module and the exhaust adaptation module; the distribution channel comprises a butt-joint flow channel, a main flow channel and more than two branch flow channels which are communicated, and a pile butt joint port of the branch flow channel is used for communicating a fluid port of a pile of the fuel cell; the air inlet adaptation module and the air outlet adaptation module are respectively provided with a first butt joint surface and a second butt joint surface which are oppositely arranged, and the electric pile butt joint interfaces of the distribution channels are distributed on the first butt joint surface and the second butt joint surface.
Optionally, the air inlet adapting module and the air outlet adapting module are both fan-shaped, the butt-joint flow channel and the flow dividing channel are both straight flow channels, and the main flow channel is a curved flow channel; the cross-sectional area of the main runner is kept unchanged or is in an increasing trend from the split runner to the butt joint runner.
Optionally, the cross-sectional area of the butting flow channel is equal to the sum of the areas of the pile butt joint ports of the sub flow channels communicated with the butting flow channel.
Optionally, two flow dividing channels are arranged in the distribution channel, and the two flow dividing channels are symmetrically distributed; a diversion structure is arranged at the transition part of the main runner and the two diversion runners; the diversion structure is a diversion protrusion protruding towards the main runner.
Optionally, the air inlet adapting module and the air outlet adapting module are respectively provided with three distributing channels; the air inlet adapting module and the air outlet adapting module comprise two half shells which are symmetrically distributed, through holes and cavities with outward openings are formed in the two half shells, the openings of the two cavities are opposite to each other to form three distribution channels, and the through holes form the galvanic pile opposite interfaces;
the half shell positioned on the same side of the air inlet adapting module and the air outlet adapting module are arranged in a split mode or are of an integrated structure.
Optionally, the air inlet adapting module and the air outlet adapting module are respectively provided with three distributing channels; each butt joint flow channel of the air inlet adaptation module and the air outlet adaptation module is sequentially arranged along a first direction; each pile pair interface positioned on the same butt joint surface in the air inlet adaptation module and each pile pair interface positioned on the same butt joint surface in the air outlet adaptation module are sequentially arranged along a second direction; the first direction is disposed at an angle to the second direction.
Optionally, the air inlet adapting module and the air outlet adapting module are respectively provided with three distributing channels; the first butt joint surface and the second butt joint surface are parallel and symmetrically distributed; a first sealing ring and/or a first sealing groove are arranged at the galvanic pile butt joint positions of the first butt joint surface and the second butt joint surface;
more than one butt joint pipe is arranged on each of the air inlet adaptation module and the air outlet adaptation module, and the pipe cavities of the butt joint pipes form the butt joint flow channel; and more than one second sealing ring and/or second sealing grooves are arranged on the outer pipe wall of the butt joint pipe.
Optionally, the material of the air inlet adapting module and/or the air outlet adapting module is at least one of PPA, GF, PA, PPS.
Based on the same inventive concept, the application also provides a fuel cell, which comprises two electric stacks and the distribution manifold, wherein the two electric stacks are in mirror symmetry distribution, the distribution manifold is arranged between the two electric stacks, and the distribution manifold is communicated with the air inlet end plates of the two electric stacks.
Optionally, the distribution manifold is arranged in a horizontal direction with two of the stacks; the air inlet end plates of the two electric stacks are respectively provided with 6 fluid through holes, and the 6 fluid through holes are distributed on two sides of the air inlet end plates and are distributed in a central symmetry manner; the 3 fluid ports on one side of the valve body are sequentially from top to bottom: the air inlet, the cooling liquid discharge port and the hydrogen discharge port are arranged on the other side, and the 3 fluid ports are sequentially from top to bottom: a hydrogen inlet, a cooling liquid inlet and an air exhaust.
According to the technical scheme, the distribution manifold comprises two module units, namely an air inlet adaptation module and an air outlet adaptation module, wherein distribution channels are respectively arranged in the air inlet adaptation module and the air outlet adaptation module and are used for air to enter and exit the electric pile, cooling liquid to enter and exit the electric pile and hydrogen to enter and exit the electric pile. The distribution channel comprises a butt-joint flow channel, a main flow channel and more than two sub-flow channels which are communicated, wherein the butt-joint flow channel is used for being communicated with a gas distribution system and a cooling liquid circulation system of the fuel cell system, the main flow channel is communicated with the butt-joint flow channel and the sub-flow channels, the sub-flow channels are used for being in butt joint with gas inlet end plates of electric stacks of the fuel cell, outlets of the sub-flow channels are electric stack butt-joint ports, and the electric stack butt-joint ports are communicated with fluid ports of the gas inlet end plates of all the electric stacks of the fuel cell in a one-to-one correspondence manner. The air inlet adaptation module and the air outlet adaptation module are respectively provided with a first butt joint surface and a second butt joint surface which are oppositely arranged, and all pile butt joints of the distribution channel are distributed on the first butt joint surface and the second butt joint surface. The distribution channels are different in position, so that the directions of the distribution channels are different, and the distribution channels cannot interfere with each other, so that the effective lengths of the distribution channels are allowed to be consistent, the problem of uniformity of fluid distribution in the pile integration process is solved, and the pile integration consistency is improved.
Compared with the prior art, the distribution manifold provided by the application has the following advantages:
1. the distribution manifold that this application provided includes air inlet adaptation module and exhaust adaptation module, compares in current integral type, monolithic distribution manifold, and the design of two module units reduces the manufacturing degree of difficulty to reduction in production cost.
2. The distribution manifold that this application provided, the orientation of each reposition of redundant personnel passageway is different in the distribution channel of air inlet adaptation module and exhaust adaptation module, guarantees that the effective length of each distribution channel is unanimous to solve the homogeneity problem of fluid distribution in the pile integration process, thereby improve pile integration's uniformity.
Drawings
Fig. 1 is a schematic view showing the structure of a distribution manifold according to embodiment 1 of the present invention.
Fig. 2 is a front view of the distribution manifold of fig. 1.
Fig. 3 is a rear view of the distribution manifold of fig. 1.
Fig. 4 is a bottom view of the distribution manifold of fig. 1.
Fig. 5 is a top view of the distribution manifold of fig. 1.
Fig. 6 is a cross-sectional view AA of fig. 5.
Fig. 7 is a cross-sectional view in BB of fig. 2.
Fig. 8 is a CC-sectional view of fig. 2.
Fig. 9 is a DD cross-sectional view of fig. 2.
Fig. 10 is an EE sectional view of fig. 2.
Fig. 11 is a FF cross-sectional view of fig. 2.
Fig. 12 is a GG-direction cross-sectional view of fig. 2.
Fig. 13 is a schematic view of the structure of a fuel cell in embodiment 2 of the present invention.
Fig. 14 is a schematic view of the fuel cell of fig. 13 with the housing removed.
Reference numerals illustrate: 100-distribution manifold, 101-first interface, 102-second interface, 103-central symmetry plane; 10-an air inlet adapting module; a 20-exhaust adaptation module; 30-distribution channels, 31-butt-joint flow channels, 32-main flow channels, 33-sub flow channels and 34-pile butt-joint ports; 40-half shell, 41-threaded hole, 42-butt joint pipe; 50-diverting protrusions; 61-a first sealing ring and 62-a second sealing ring; 71-first seal groove, 72-second seal groove.
30 a-air inlet and distribution channels, 30 b-discharge cooling liquid channels, 30 c-hydrogen gas discharge and distribution channels, 30 d-hydrogen gas inlet and distribution channels, 30 e-inlet and distribution cooling liquid channels and 30 f-air discharge and distribution channels.
31 a-air inlet and outlet gas distribution butt joint flow passages, 31 b-row distribution cooling liquid butt joint flow passages, 31 c-hydrogen outlet gas distribution butt joint flow passages, 31 d-hydrogen inlet and outlet gas distribution butt joint flow passages, 31 e-inlet and outlet gas distribution butt joint flow passages and 31 f-air outlet gas distribution butt joint flow passages.
34 a-air inlet and outlet air pair interfaces, 34 b-exhaust cooling liquid pair interfaces, 34 c-hydrogen exhaust air pair interfaces, 34 d-hydrogen inlet and outlet air pair interfaces, 34 e-inlet and outlet air pair interfaces, and 34 f-air exhaust air pair interfaces.
1000-a fuel cell; 100-distribution manifold; 200-pile, 210-air inlet end plate; 300-housing, 310-fitting.
Detailed Description
In order to make the technical solution more clearly understood by those skilled in the art, the following detailed description is made with reference to the accompanying drawings.
At present, a fuel cell adopts a scheme of integrating a plurality of electric piles, a fuel cell with higher power is formed by a plurality of electric piles with lower power, and each electric pile is distributed with gas and cooling liquid through a distribution manifold. In the related art, the distribution manifold adopts an integrated structure, and a total channel and a sub-channel are arranged in the distribution manifold, wherein the total channel is divided into two parts through the sub-channel so as to be communicated with different electric stacks. The distribution manifold of the related art can distribute gas to two stacks at the same time, but the distribution manifold is unfavorable for the uniformity of gas distribution and the uniformity of cooling liquid after the integration of the stacks due to the inconsistent effective lengths of the two sub-channels of the sub-channels.
In order to overcome the defects of the related art, the invention provides a distribution manifold and a fuel cell, which can solve the problem of uniformity of fluid distribution in the pile integration process, thereby improving the pile integration consistency.
The following describes the technical scheme of the present application in detail through specific embodiments:
example 1:
the embodiment of the invention provides a distribution manifold 100, as shown in fig. 1 to 5, which comprises two module units of an air inlet adapting module 10 and an air outlet adapting module 20, wherein the two module units are respectively connected with two ends of an air inlet end plate of a galvanic pile in a butt joint mode, namely, the air inlet adapting module 10 is connected with a fluid through hole at one end of the air inlet end plate of the galvanic pile in a butt joint mode, and the air outlet adapting module 20 is connected with a fluid through hole at the other end of the air inlet end plate of the galvanic pile in a butt joint mode. The distribution channels 30 of the intake and exhaust adaptation modules 10 and 20 are used for air in and out of the stack, coolant in and out of the stack, and hydrogen in and out of the stack. Specifically, in the present embodiment, three distribution channels 30 are respectively provided in the air intake adaptation module 10 and the exhaust adaptation module 20, the three distribution channels 30 of the air intake adaptation module 10 are respectively an air intake and distribution channel 30a, an exhaust cooling liquid channel 30b, and a hydrogen exhaust and distribution channel 30c, and the three distribution channels 30 corresponding to the exhaust adaptation module 20 are respectively a hydrogen intake and distribution channel 30d, an intake and distribution cooling liquid channel 30e, and an air exhaust and distribution channel 30f.
Referring to fig. 6, the six distribution channels 30 each include a butt-joint channel 31, a main channel 32 and more than two branch channels 33, wherein the butt-joint channel 31 is used for being communicated with a gas distribution system and a cooling liquid circulation system of the fuel cell system, the main channel 32 is communicated with the butt-joint channel 31 and the branch channels 33, the branch channels 33 are used for being in butt joint with gas inlet end plates of electric stacks of the fuel cells, outlets of the branch channels 33 are electric stack opposite interfaces 34, and the electric stack opposite interfaces 34 are in one-to-one correspondence communication with fluid ports of the gas inlet end plates of the electric stacks of the fuel cells. The intake adapter module 10 and the exhaust adapter module 20 each have a first mating surface 101 and a second mating surface 102 that are disposed opposite to each other, and the respective stack interfaces 34 of the distribution channel 30 are distributed on the first mating surface 101 and the second mating surface 102. Due to the different positions of the distribution channels 30, the directions of the distribution channels 33 are different, and the distribution channels 33 cannot interfere with each other, so that the effective lengths of the distribution channels 33 are allowed to be consistent, the problem of uniformity of fluid distribution in the pile integration process is solved, and the pile integration consistency is improved.
The overall shape and size of the intake adapter module 10 and the exhaust adapter module 20 may be identical, reducing the mold costs for producing the intake adapter module 10 and the exhaust adapter module 20. In this embodiment, the intake adaptation module 10 and the exhaust adaptation module 20 are both fan-shaped, the butt joint flow channel 31 and the sub flow channel 33 are straight flow channels, the main flow channel 32 is a curved flow channel, for example, a circular arc flow channel, which is gradually curved from top to bottom from the horizontal, and the main flow channels 32 of the three distribution channels 30 located in the same intake adaptation module 10/exhaust adaptation module 20 are sequentially distributed along the radial direction. Specifically, in the present embodiment, the three main flow channels 32 of the air intake and distribution main flow channel of the air intake and distribution adapting module 10 are respectively an air intake and distribution main flow channel, an air distribution and distribution cooling liquid main flow channel, and a hydrogen air distribution and distribution main flow channel, and the three main flow channels 32 corresponding to the air exhaust and distribution adapting module 20 are respectively a hydrogen air intake and distribution main flow channel, an air intake and distribution cooling liquid main flow channel, and an air distribution and distribution main flow channel. The cross-sectional area of the main flow passage 32 is maintained constant or in an increasing trend along the flow direction from the split flow passage 33 to the abutting flow passage 31, facilitating the entry and discharge of air, cooling liquid and hydrogen.
In this embodiment, the main body portions of the air intake adaptation module 10 and the air exhaust adaptation module 20 are all fan-shaped, and the air intake adaptation module 10 and the air exhaust adaptation module 20 are symmetrical structures, that is, the air adaptation module and the air exhaust adaptation module 20 can be divided into two parts by a plane, and into two mirror symmetry structures, that is, the air intake adaptation module 10 and the air exhaust adaptation module 20 are both provided with a central symmetry plane 103, and the first butt joint plane 101 and the second butt joint plane 102 are distributed on two sides of the central symmetry plane 103. Since the air intake adaptation module 10 and the exhaust adaptation module 20 are internally provided with 3 branched distribution channels 30, in order to simplify the production process of the air intake adaptation module 10 and the exhaust adaptation module 20, in this embodiment, the air intake adaptation module 10 and the exhaust adaptation module 20 each include two half-shells 40 distributed in mirror symmetry, the two half-shells 40 are provided with through holes and cavities with outward openings, the openings of the two cavities are opposite to each other, so as to form three distribution channels 30, and the through holes form the galvanic pile opposite interfaces 34.
The four half-cases 40 forming the intake adapter module 10 and the exhaust adapter module 20 may be independent case structures or may be connected to each other in pairs. For example, in this embodiment, the four half-shells 40 are independent of each other, so that the assembled air intake adaptation module 10 and the assembled air exhaust adaptation module 20 are not physically connected, and therefore, the intervals between the air intake adaptation module 10 and the air exhaust adaptation module 20 can be adjusted according to the size of the air intake end plate of the electric pile, so that electric piles with more types can be adapted, and compared with the integral distribution manifold 100, the volume of a single module unit is smaller, and when the distribution manifold 100 is produced in a large scale, the cost of one-time mold investment is low because the sizes of the air intake adaptation module 10 and the air exhaust adaptation module 20 are smaller. In other embodiments, the half-shells 40 on the same side of the intake and exhaust adapter modules 10 and 20 may be configured as an integral structure, i.e. the two half-shells 40 with the first butt-joint surface 101 are fixedly connected together, the two half-shells 40 with the second butt-joint surface 102 are fixedly connected together, simplifying the production process and saving two production dies. A plurality of screw holes 41 for mounting screws are provided on the outer circumference of the distribution manifold 100, and the distribution manifold 100 is fixedly connected to the intake end plate by the screws.
In the selection of the material of the distribution manifold 100, ions are precipitated from the metal material, which causes catalyst contamination, and the metal material is a conductor, which is a risk of electrical leakage. The material of the distribution manifold 100 should be selected to be non-metallic. Specifically, in the present embodiment, the materials of the air intake adapter module 10 and the air exhaust adapter module 20 are at least one of PPA (polyphthalamide), GF (glass fiber for short), PA (polyamide for short), and PPS (polyphenylene sulfide), and the materials of the air intake adapter module 10 and the air exhaust adapter module 20 may be the same or different. For example, ppa+gf30 (with a GF addition of 30% by weight of the total material), ppa+gf40 (with a GF addition of 40% by weight of the total material), pa6+gf15, PPS, and the like may be used as the material of the distribution manifold 100. The above materials may be integrally molded to prepare the half shell 40 by an injection molding process.
The number of the split channels 33 in the distribution channels 30 depends on the number of stacks in the adapted fuel cell, and referring to fig. 7 to 12, in this embodiment, two split channels 33 are provided in each distribution channel 30, and the two split channels 33 are symmetrically distributed, that is, the central symmetry plane 103 of the intake adaptation module 10 and the exhaust adaptation module 20 is also the symmetry plane of the distribution channel 30. By arranging the air inlet adapting module 10 and the air outlet adapting module 20 to be symmetrical structures, and arranging the internal distributing channels 30 to be symmetrical structures, and arranging the symmetrical planes of the distributing channels 30, the air inlet adapting module 10 and the air outlet adapting module 20 to be coplanar, on one hand, the completely symmetrical structures can ensure that the effective lengths of fluid channels entering two electric stacks in the same distributing channel 30 are completely the same, thus solving the problem of uniformity of fluid distribution in the electric stack integration process, and improving the consistency of electric stack integration. On the other hand, the two stacks to which the distribution manifold 100 is connected may be arranged in a symmetrical manner, facilitating the design of the two stacks high voltage, low voltage lines and the design of the fuel cell housing.
In order to reduce the pressure loss, in the present embodiment, in the same distribution channel 30, the cross-sectional area of the butting channel 31 is equal to the sum of the areas of the pile-to-interface 34 of each sub-channel 33, so as to ensure that the areas of the fluid inlet and the fluid outlet in the distribution manifold 100 are consistent.
In order to further reduce the pressure loss, referring to fig. 7 to 12, in the present embodiment, a split structure is disposed at the transition between the main flow channel 32 and the two split flow channels 33, the split structure is a split protrusion 50 protruding toward the main flow channel 32, and since the distribution channel 30, the intake adaptation module 10 and the exhaust adaptation module 20 are all symmetrical structures, the corresponding split protrusion 50 is also symmetrical structure, and the symmetry plane of the split protrusion 50 is also a central symmetry plane 103. By arranging the diversion protrusion 50, when the fluid in the main flow channel 32 passes through the transition part of the main flow channel 32 and the two diversion channels 33, the diversion protrusion 50 can guide the fluid, so that the fluid in the main flow channel 32 can be conveniently divided into two diversion beams with identical flow and flow velocity, and smoothly enter the two diversion channels 33 under the guidance of the diversion protrusion 50.
Fig. 7 to 12 show cross-sectional views of the transition of the main flow channel 32 and the two split flow channels 33 in the six distribution channels 30 of the intake and exhaust adapter modules 10 and 20, and it can be seen that the cross-section of the transition of the main flow channel 32 and the two split flow channels 33 is "Y" shaped, and by analysis, the "Y" shaped fluid chamber provided with the split flow protrusions 50 can reduce the pressure loss 18KPa compared to the "T" shaped fluid chamber not provided with the split flow protrusions 50.
Since six fluid ports in the current air intake end plate of the electric pile are generally distributed in a central symmetry manner, referring to fig. 6, in this embodiment, three electric pile pair ports 34 located on the first docking surface 101 and three electric pile pair ports 34 located on the second docking surface 102 in the air intake adapter module 10 are all sequentially arranged along the second direction, and three electric pile pair ports 34 located on the first docking surface 101 and three electric pile pair ports 34 located on the second docking surface 102 in the air exhaust adapter module 20 are also sequentially arranged along the second direction. That is, the six stack-to-interface 34 of the intake adapter module 10 and the six stack-to-interface 34 of the exhaust adapter module 20 are distributed at two ends, and can be matched with the structure of the current stack intake end plate.
And the six galvanic pile pair interfaces 34 located on the first docking surface 101 are all distributed in a central symmetry manner, and are located in the six galvanic pile pair interfaces 34 of the first docking surface 101: the three stack-to-stack interfaces 34 corresponding to the air intake adapter module 10 are an air intake and distribution interface 34a, an exhaust and distribution coolant interface 34b and a hydrogen exhaust and distribution interface 34c respectively, and the three stack-to-stack interfaces 34 corresponding to the exhaust adapter module 20 are a hydrogen intake and distribution interface 34d, an intake and distribution coolant interface 34e and an air exhaust and distribution interface 34f respectively. The six stack interfaces 34 on the second mating surface 102 are also arranged as described above.
Referring to fig. 5, the respective docking flow passages 31 of the intake adaptation module 10 and the exhaust adaptation module 20 are sequentially arranged along the first direction, for example, from left to right, and the three docking flow passages 31 of the intake adaptation module 10 are a hydrogen gas exhaust docking flow passage 31c, an exhaust cooling liquid docking flow passage 31b, and an air intake docking flow passage 31a, respectively; the three docking flow passages 31 of the exhaust gas adapting module 20 are a hydrogen gas inlet and outlet docking flow passage 31d, a cooling liquid inlet and outlet docking flow passage 31e and an air outlet and outlet docking flow passage 31f, respectively, from left to right. The first direction and the second direction are arranged at an angle, so that the butt joint flow channel 31 and the electric pile butt joint interface 34 are ensured to be positioned at different azimuth sides, and the arrangement of the electric pile and an external hydrogen supply subsystem, an external oxygen supply subsystem and an external cooling liquid subsystem is facilitated. In this embodiment, the first direction is parallel to the long side direction of the bipolar plates of the stack and the second direction is parallel to the short side direction of the bipolar plates of the stack.
Since the first and second butt surfaces 101 and 102 of the intake and exhaust adapter modules 10 and 20 are respectively adapted to the intake end plates of the two stacks, the first and second butt surfaces 101 and 102 are parallel and symmetrically distributed, and the first and second butt surfaces 101 and 102 are parallel to the central symmetry plane 103. Referring to fig. 2 and 3, a first seal ring 61 and/or a first seal groove 71 are provided at the stack-to-interface 34 of the first and second mating surfaces 101 and 102. That is, the first seal ring 61 may be provided only at the stack-to-interface 34 of the first and second butt surfaces 101 and 102, and the first seal ring 61 may be adhered to the stack-to-interface 34; in some embodiments, the first seal groove 71 may be provided only at the stack-to-interface 34 of the first and second docking surfaces 101 and 102, and the first seal ring 61 may be installed in the first seal groove 71 in the subsequent fuel cell assembly process; in other embodiments, the first seal groove 71 may be provided at the stack interface 34 of the first and second mating surfaces 101 and 102, and the first seal ring 61 may be installed in the first seal groove 71.
In order to facilitate docking of the external hydrogen supply subsystem, oxygen supply subsystem, and cooling liquid supply subsystem, in this embodiment, the air intake adapter module 10 and the air exhaust adapter module 20 are each provided with one or more docking pipes 42, and the lumens of the docking pipes 42 form the docking flow channel 31. Specifically, in this embodiment, three docking pipes 42 are disposed on the adapting module and the exhaust adapting module 20, and the lumens of the three docking pipes 42 form three docking channels 31. In other embodiments, only one or two butt joint pipes may be provided on the intake adapter module 10 and the exhaust adapter module 20, and the pipe cavities of the butt joint pipes are formed into two or three butt joint flow passages 31 by providing a partition plate in the butt joint pipes. More than one second sealing ring 62 and/or second sealing groove 72 are provided on the outer tube wall of the docking tube 42 for achieving assembly and sealing of the docking tube 42 with the housing of the fuel cell.
Example 2:
based on the same inventive concept, the embodiment of the present application provides a fuel cell 1000, referring to fig. 13 and 14, the fuel cell 1000 is a dual stack integrated fuel cell 1000, including two stacks 200 and the distribution manifold 100 of the above embodiment 1, the two stacks 200 are distributed in a mirror symmetry, the distribution manifold 100 is disposed between the two stacks 200, and the distribution manifold 100 is in communication with the intake end plates 210 of the two stacks 200.
Referring to fig. 13 and 14, in the present embodiment, the distribution manifold 100 and the two stacks 200 are arranged in the horizontal direction, that is, in the stacking direction of the bipolar plates in the stacks 200, the fuel cell 1000 is a left-side stack 200, a distribution manifold 100, and a right-side stack 200 in this order. The air inlet end plates 210 of the two stacks 200 are respectively provided with 6 fluid ports, and the 6 fluid ports are distributed on two sides of the air inlet end plates 210 and are distributed in a central symmetry manner. The 3 fluid ports on one side of the valve body are sequentially from top to bottom: the air inlet, the cooling liquid discharge port and the hydrogen discharge port are sequentially from top to bottom, and the 3 fluid ports on the other side are as follows: a hydrogen inlet, a cooling liquid inlet and an air exhaust. By arranging the air inlet and the hydrogen inlet at the two ends of the air inlet end plate 210, air and hydrogen form convection, and the self-humidifying performance of the electric pile 200 is improved. In addition, by arranging the air inlet at the upper part and the air outlet at the lower part, the hydrogen inlet at the upper part and the hydrogen outlet at the lower part, and the air distribution mode of up-in and down-out is adopted, so that the reaction efficiency is convenient to improve.
The 6 stack 200-to-interface 34 of the first docking surface 101 of the distribution manifold 100 respectively docks the 6 fluid ports on the air inlet end plate 210 of the left side stack 200, the 6 stack 200-to-interface 34 of the second docking surface 102 of the distribution manifold 100 respectively docks the 6 fluid ports on the air inlet end plate 210 of the left side stack 200, and the docking positions are all sealed by the first seal ring 61. In order to fix the distribution manifold 100, a plurality of screw holes 41 are provided on the outer circumference of the distribution manifold 100, and the distribution manifold 100 is fixedly coupled to the intake end plate 210 by screws. Specifically, in the present embodiment, the left pile 200 is fixedly connected to the right half shells 30040 through screws, and the right pile 200 is fixedly connected to the left half shells 30040 through screws, so as to further improve the sealing effect of the first sealing ring 61.
The fuel cell 1000 further includes a housing 300, wherein the distribution manifold 100 and the two stacks 200 are both disposed in the housing 300, and 6 assembling portions 310 are disposed on the housing 300, and 6 docking tubes 42 of the distribution manifold 100 extend out of the housing 300 through the assembling portions 310 for communication with a hydrogen supply subsystem, an oxygen supply subsystem, and a cooling liquid subsystem outside the housing 300. The gap between the butt joint pipe 42 and the fitting portion 310 is sealed by the second seal ring 62, and in order to ensure the sealing effect, 2 or more second seal rings 62 may be provided at intervals along the axial direction of the butt joint pipe 42.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (10)
1. A distribution manifold, characterized by: the device comprises an air inlet adaptation module and an air outlet adaptation module; three distribution channels are arranged in each of the air inlet adaptation module and the air outlet adaptation module; the distribution channel comprises a butt-joint flow channel, a main flow channel and more than two branch flow channels which are communicated, and a pile butt joint port of the branch flow channel is used for communicating a fluid port of a pile of the fuel cell; the air inlet adapting module and the air outlet adapting module are respectively provided with a first butt joint surface and a second butt joint surface which are oppositely arranged, and the electric pile butt joint interfaces of the distribution channels are distributed on the first butt joint surface and the second butt joint surface; each butt joint flow channel of the air inlet adaptation module and the air outlet adaptation module is sequentially arranged along a first direction; the pile butt joint interface of the air inlet adaptation module and the pile butt joint interface of the air outlet adaptation module are distributed at two ends, and the butt joint runner and the pile butt joint interface are located at different azimuth sides.
2. The distribution manifold of claim 1, wherein: the air inlet adaptation module and the air outlet adaptation module are both fan-shaped, the butt joint flow channel and the flow dividing channel are both straight flow channels, and the main flow channel is a bent flow channel; the cross-sectional area of the main runner is kept unchanged or is in an increasing trend from the split runner to the butt joint runner.
3. The distribution manifold of claim 1, wherein: the cross-sectional area of the butt-joint flow channel is equal to the sum of the areas of the pile butt-joint ports of the sub-flow channels communicated with the butt-joint flow channel.
4. The distribution manifold of claim 1, wherein: two distribution channels are arranged in the distribution channel and are symmetrically distributed; a diversion structure is arranged at the transition part of the main runner and the two diversion runners; the diversion structure is a diversion protrusion protruding towards the main runner.
5. The distribution manifold of any of claims 1-4, wherein: the air inlet adapting module and the air outlet adapting module comprise two half shells which are symmetrically distributed, through holes and cavities with outward openings are formed in the two half shells, the openings of the two cavities are opposite to each other to form three distribution channels, and the through holes form the galvanic pile opposite interfaces;
the half shell positioned on the same side of the air inlet adapting module and the air outlet adapting module are arranged in a split mode or are of an integrated structure.
6. The distribution manifold of any of claims 1-4, wherein: each pile pair interface positioned on the same butt joint surface in the air inlet adaptation module and each pile pair interface positioned on the same butt joint surface in the air outlet adaptation module are sequentially arranged along a second direction; the first direction is disposed at an angle to the second direction.
7. The distribution manifold of any of claims 1-4, wherein: the first butt joint surface and the second butt joint surface are parallel and symmetrically distributed; a first sealing ring and/or a first sealing groove are arranged at the galvanic pile butt joint positions of the first butt joint surface and the second butt joint surface;
more than one butt joint pipe is arranged on each of the air inlet adaptation module and the air outlet adaptation module, and the pipe cavities of the butt joint pipes form the butt joint flow channel; and more than one second sealing ring and/or second sealing grooves are arranged on the outer pipe wall of the butt joint pipe.
8. The distribution manifold of any of claims 1-4, wherein: the material of the air inlet adapting module and/or the air outlet adapting module is at least one of PPA, GF, PA, PPS.
9. A fuel cell, characterized in that: the distribution manifold comprises two electric stacks and the distribution manifold of any one of claims 1-8, wherein the two electric stacks are distributed in a mirror symmetry mode, the distribution manifold is arranged between the two electric stacks, and the distribution manifold is communicated with air inlet end plates of the two electric stacks.
10. The fuel cell according to claim 9, wherein: the distribution manifold and the two electric stacks are arranged along the horizontal direction; the air inlet end plates of the two electric stacks are respectively provided with 6 fluid through holes, and the 6 fluid through holes are distributed on two sides of the air inlet end plates and are distributed in a central symmetry manner; the 3 fluid ports on one side of the valve body are sequentially from top to bottom: the air inlet, the cooling liquid discharge port and the hydrogen discharge port are arranged on the other side, and the 3 fluid ports are sequentially from top to bottom: a hydrogen inlet, a cooling liquid inlet and an air exhaust.
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| CN202111172293.8A CN114464863B (en) | 2021-10-08 | 2021-10-08 | Distribution manifold and fuel cell |
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