CN113871679B - A fuel cell stack with flow distribution function - Google Patents
A fuel cell stack with flow distribution function Download PDFInfo
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- CN113871679B CN113871679B CN202111274312.8A CN202111274312A CN113871679B CN 113871679 B CN113871679 B CN 113871679B CN 202111274312 A CN202111274312 A CN 202111274312A CN 113871679 B CN113871679 B CN 113871679B
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- 239000000446 fuel Substances 0.000 title claims abstract description 44
- 238000005315 distribution function Methods 0.000 title claims abstract description 18
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009423 ventilation Methods 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
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- 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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- General Chemical & Material Sciences (AREA)
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Abstract
本发明提出的一种具有流动分配功能的燃料电池电堆，包括进气管、出气管、以及设置在所述进气管和所述出气管之间的电池电堆本体；所述进气管的开口端端面延伸出所述电池电堆本体的一端，所述进气管的盲端端面延伸出所述电池电堆本体的另一端。通过在进气管内平行设置第一流道和第二流道，并在进气管的盲端开设第一通孔将第一流道和第二流道连通，从而避免气流在进气管盲端产生涡结构；同时也可以通过调控第一流道和第二流道的气流量比调整气流在燃料电池电堆内的分布，达到有效分配气流的目的。通过在进气管内设置回流道，可以有效地将进气管盲端的气流导出，并补充至进气管的开口端，有效地避免了气流在进气管的盲端产生涡结构。
The present invention proposes a fuel cell stack with a flow distribution function, comprising an air inlet pipe, an air outlet pipe, and a battery stack body arranged between the air inlet pipe and the air outlet pipe; the open end face of the air inlet pipe extends out of one end of the battery stack body, and the blind end face of the air inlet pipe extends out of the other end of the battery stack body. By arranging the first flow channel and the second flow channel in parallel in the air inlet pipe, and opening a first through hole at the blind end of the air inlet pipe to connect the first flow channel and the second flow channel, it is avoided that the airflow generates a vortex structure at the blind end of the air inlet pipe; at the same time, the distribution of the airflow in the fuel cell stack can be adjusted by regulating the airflow ratio of the first flow channel and the second flow channel, so as to achieve the purpose of effectively distributing the airflow. By arranging a return channel in the air inlet pipe, the airflow at the blind end of the air inlet pipe can be effectively guided out and supplemented to the open end of the air inlet pipe, which effectively avoids the airflow generating a vortex structure at the blind end of the air inlet pipe.
Description
Technical Field
The present invention relates to the technical field of fuel cells, and in particular, to a fuel cell stack with a flow distribution function.
Background
In the face of the increasingly strict exhaust emission standards and future energy crisis in China and even worldwide, all bus factories are developing new low-emission energy technologies to adapt to the development trend. Among them, the fuel cell car is one of the fields of the current large-car enterprises and developments. The main body portion of the fuel cell is composed of a plurality of single cell stacks having the same structure. The batteries are connected in series to meet rated voltage required by working conditions. The amount of intake air for each cell is particularly critical as a place for carrying the oxyhydrogen reaction. Even and good air flow distribution among single cells can effectively improve the consistency of the cells and improve the whole stack performance. The fuel cell stack comprises a metal bipolar plate stack and a graphite stack, and the air inlet channels of the metal bipolar plate stack and the graphite stack are designed by adopting a simple direct current channel. Under the condition of constant flow ventilation, the air flow is not controlled by the structure in the channel, and the phenomenon of uneven distribution of the air flow among single cells is easy to occur. In addition, the working conditions faced by the fuel cell are more complex in the running process of the automobile, such as frequent start-stop, and rapid load change can influence frequent fluctuation of reaction air pressure, air flow and the like, so that mechanical damage of the cell stack can be possibly caused. Therefore, the uniform distribution of the air flow is beneficial to delaying the performance attenuation of the fuel cell and prolonging the service life of the fuel cell.
The existing fuel cell stack air inlet adopts a direct current channel design, only one end is provided with an opening, the other end is a blind end, a vortex structure is generated when air flows to the blind end, and at the moment, the flow mode of the air flows is changed from laminar flow to turbulent flow, so that the momentum of the air flows can be consumed; in addition, the air inlet of the straight flow passage has low air pressure and high flow velocity near the inlet in the air inlet process; the phenomenon that the air pressure far from the inlet is high and the flow speed is low is caused, so that the air flow speed and the air pressure entering different single cells are greatly different, the air flow in different single cells is uneven, and the overall pressure drop of the fuel cell stack system is reduced.
Disclosure of Invention
Based on the above, the invention provides a fuel cell stack with a flow distribution function, which aims to solve the problem that when the prior fuel cell stack air inlet adopts a direct current channel design, air flow generates a vortex structure at the blind end of the direct current channel, so that the flow mode of the air flow in the flow channel is changed from laminar flow to turbulent flow; in addition, the air inlet of the straight flow passage has low air pressure and high flow velocity near the inlet in the air inlet process; the phenomenon that the air pressure far from the inlet is high and the flow speed is low is caused, so that the air flow speed and the air pressure entering different single cells are greatly different, the air flow in different single cells is uneven, and the overall pressure drop of the fuel cell stack system is reduced.
In order to achieve the above purpose, the present invention proposes the following technical scheme:
A fuel cell stack with flow distribution function comprises an air inlet pipe, an air outlet pipe and a cell stack body arranged between the air inlet pipe and the air outlet pipe; the air inlet pipe and the air outlet pipe are arranged in parallel; the end face of the opening end of the air inlet pipe extends out of one end of the battery pile body, and the end face of the blind end of the air inlet pipe extends out of the other end of the battery pile body; the battery pile body comprises a plurality of single cells which are arranged in parallel; a first connecting bridge is arranged between the inlet of the single cell and the air inlet pipe; a second connecting bridge is arranged between the outlet of the single battery and the air outlet pipe.
In the application, the blind end of the air inlet pipe extends out of the cell stack body, when air flow enters from the opening end of the air inlet pipe, a part of the air flow flows into the single cells, but the air flow which does not flow into the single cells flows to the part of the blind end of the air inlet pipe extending out of the cell stack body, and the flow of the air flow is changed through the corresponding flow passage design in the air inlet pipe, thereby avoiding the vortex structure of the air flow generated by the part of the air inlet pipe, which is communicated with the single cells, ensuring the laminar flow of the air flow in the air inlet pipe, ensuring that the air flow can be uniformly distributed into the fuel cell stack, and further ensuring the uniformity of the integral pressure drop of the fuel cell stack.
Further, a first runner, a second runner and a first through hole are arranged in the air inlet pipe; the first flow channel and the second flow channel are arranged in parallel; one end of the first flow passage, which is close to the blind end of the air inlet pipe, is communicated with the second flow passage through the first through hole.
Further, the cross-sectional area of the first flow passage is smaller than the cross-sectional area of the second flow passage.
Further, a plurality of first air inlet interfaces matched with the first connecting bridge are arranged on one side, close to the battery stack body, of the second flow channel.
Further, a straight flow channel is arranged in the air outlet pipe; and a plurality of air outlet interfaces matched with the second connecting bridge are arranged on the straight flow passage.
Further, a third runner, a return runner, a second through hole and a third through hole are further arranged in the air inlet pipe; the third flow channel is arranged in parallel with the return flow channel; one end of the return channel, which is close to the opening end of the air inlet pipe, is communicated with the third flow channel through the second through hole; one end of the return channel, which is close to the blind end of the air inlet pipe, is communicated with the third flow channel through the third through hole.
Further, a distance between the second through hole and the third through hole is greater than a width of the cell stack body.
Further, the cross-sectional area of the return channel is smaller than the cross-sectional area of the third channel.
Further, a choke groove is arranged at one end of the reflux channel, which is far away from the third through hole.
Further, a plurality of second air inlet interfaces matched with the second connecting bridge are arranged on one side, close to the battery stack body, of the third flow channel
According to the fuel cell stack with the flow distribution function, the first flow channel and the second flow channel are arranged in the air inlet pipe in parallel, and the first through hole is formed in the blind end of the air inlet pipe to communicate the first flow channel with the second flow channel, so that the air flow is prevented from generating a vortex structure at the blind end of the air inlet pipe; meanwhile, the distribution of the air flow in the fuel cell stack can be adjusted by adjusting the air flow ratio of the first flow channel and the second flow channel, so that the purpose of effectively distributing the air flow is achieved. Through set up the return channel in the intake pipe, can be effectively with the air current of intake pipe blind end export to supply to the open end of intake pipe, avoided the air current effectively to produce vortex structure at the blind end of intake pipe, make the air current in the intake pipe can form the return circuit, obtain the redistribution at last between the single cell of fuel cell pile.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a front view of a fuel cell stack with flow distribution according to an embodiment of the present invention;
FIG. 2 is an enlarged view of part A of FIG. 1;
FIG. 3 is an enlarged view of part B of FIG. 1;
Fig. 4 is a cross-sectional view of the intake pipe of fig. 1 along a length direction;
FIG. 5 is a cross-sectional view of the outlet tube of FIG. 1 taken along the length thereof;
Fig. 6 is a cross-sectional view of another embodiment of the air intake pipe of fig. 1 along the length direction.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The existing fuel cell stack air inlet adopts a direct current channel design, only one end is provided with an opening, the other end is a blind end, a vortex structure is generated when air flows to the blind end, and at the moment, the flow mode of the air flows is changed from laminar flow to turbulent flow, so that the momentum of the air flows can be consumed; in addition, the air inlet of the straight flow passage has low air pressure and high flow velocity near the inlet in the air inlet process; the phenomenon that the air pressure far from the inlet is high and the flow speed is low is caused, so that the air flow speed and the air pressure entering different single cells are greatly different, the air flow in different single cells is uneven, and the overall pressure drop of the fuel cell stack system is reduced. In order to solve the technical problems, the invention provides a fuel cell stack with a flow distribution function.
Example 1
As shown in fig. 1 to 3, a fuel cell stack with a flow distribution function according to an embodiment of the present invention includes an air inlet pipe 1, an air outlet pipe 2, and a cell stack body 3 disposed between the air inlet pipe 1 and the air outlet pipe 2; the air inlet pipe 1 and the air outlet pipe 2 are arranged in parallel; the end face of the opening end 11 of the air inlet pipe 1 extends out of one end of the battery pile body 3, and the end face of the blind end 12 of the air inlet pipe 1 extends out of the other end of the battery pile body 3; the cell stack body 3 includes a plurality of unit cells 31 arranged in parallel; a first connecting bridge 4 is arranged between the inlet of the single cell 31 and the air inlet pipe 1, and a second connecting bridge 5 is arranged between the outlet of the single cell 31 and the air outlet pipe 2.
In the present embodiment, the first connection bridge 4 and the inlet port for communicating the intake pipe 1 and the single cell 31; the second connecting bridge 5 and the outlet end for communicating the outlet pipe 2 and the single cell 31. According to the embodiment of the application, the blind end of the air inlet pipe 1 extends out of the cell stack body 3, when air flow enters from the opening end 11 of the air inlet pipe 1, a part of the air flow flows into the single cells 31 through the first connecting bridge 4, but the air flow which does not flow into the single cells 31 flows to the part of the blind end 12 of the air inlet pipe 1 extending out of the cell stack body 3, and the flow of the air flow is changed through the corresponding flow passage design in the air inlet pipe, so that the vortex structure of the air flow generated by the part of the air inlet pipe 1 communicated with the single cells 31 is avoided, the laminar flow of the air flow in the air inlet pipe 1 is ensured, and the air flow can be uniformly distributed into the fuel cell stack, thereby ensuring the uniformity of the integral pressure drop of the fuel cell stack.
Referring to fig. 4, in the present embodiment, a first flow passage 13, a second flow passage 14, and a first through hole 15 are provided in the intake pipe 1; the first flow channel 13 is arranged in parallel with the second flow channel 14; one end of the first flow channel 13, which is close to the blind end 12 of the air inlet pipe 1, is communicated with the second flow channel 14 through the first through hole 15. In the present application, the inlets of the first flow channel 13 and the second flow channel 14 are both arranged at the opening end 11 of the air inlet pipe 1, and are communicated with each other only at the blind end 12 of the air inlet pipe 1; when the fuel cell stack starts to operate, air flows are introduced into the first flow channel 13 and the second flow channel 14, and at this time, the air flow in the first flow channel 13 flows only along the length direction of the first flow channel 13 and reaches the first through hole 15; a part of the air flow in the second flow channel 14 flows into the single cell 31, and the air flow which does not flow into the single cell 31 flows to the first through hole 15 along the length direction of the second flow channel 14 and is converged with the air flow in the first flow channel 13; since the air flow in the first flow channel 13 does not consume flow in the flowing process, and the air flow in the second flow channel 14 partially enters the single cell 31, the air flow is reduced, so that the air flow in the first flow channel 13 can enter the second flow channel 14 through the first through hole 15, the air flow in the second flow channel 14 is effectively prevented from generating a vortex structure at the blind end 12 of the air inlet pipe 1, and the air flow in the second flow channel 14 can be uniformly distributed into the single cell 31.
In this embodiment, the cross-sectional area of the first flow channel 13 is smaller than the cross-sectional area of the second flow channel 14. This not only ensures that the air flow in the second flow channel 14 can be distributed into the single cells 31 with enough flow, but also eliminates the air vortex structure generated by the blind end 12 of the air inlet pipe 1 by introducing smaller air flow into the first flow channel 13. In the application, the distribution of the air flow in the single cells 31 can be adjusted by adjusting the air flow ratio of the first flow channel 13 and the second flow channel 14, thereby achieving the purpose of effectively distributing the air flow.
In this embodiment, a plurality of first air inlet ports 141 adapted to the first connecting bridge 4 are disposed on a side of the second flow channel 14 near the battery stack body 3.
In this embodiment, a plurality of the first air inlet ports 141 are disposed along the length direction of the second flow channel 14, the first air inlet ports 141 are in communication with the inlet of the first connecting bridge 4, and the outlet of the first connecting bridge 4 is in communication with the inlet of the single cell 31; the air flow in the second flow channel 14 can flow into the single cells 31 through the first connecting bridge 4.
Referring to fig. 5, in this embodiment, a straight flow channel 21 is provided in the air outlet pipe 2; and a plurality of air outlet interfaces 211 matched with the second connecting bridge 5 are arranged on one side of the straight flow channel 21, which is close to the battery stack body 3.
In this embodiment, a plurality of the air outlet ports 211 are disposed along the length direction of the dc channels 21, the air outlet ports 211 are communicated with the outlet of the second connection bridge 5, and the inlet of the second connection bridge 5 is communicated with the outlet of the single cell 31; the air flow in the single cell 31 can flow into the direct flow path 21 through the second connecting bridge 5.
Example 2
As shown in fig. 1 to 3, a fuel cell stack with a flow distribution function according to an embodiment of the present invention includes an air inlet pipe 1, an air outlet pipe 2, and a cell stack body 3 disposed between the air inlet pipe 1 and the air outlet pipe 2; the air inlet pipe 1 and the air outlet pipe 2 are arranged in parallel; the end face of the opening end 11 of the air inlet pipe 1 extends out of one end of the battery pile body 3, and the end face of the blind end 12 of the air inlet pipe 1 extends out of the other end of the battery pile body 3; the cell stack body 3 includes a plurality of unit cells 31 arranged in parallel; a first connecting bridge 4 is arranged between the inlet of the single cell 31 and the air inlet pipe 1; a second connecting bridge 5 is arranged between the outlet of the single cell 31 and the air outlet pipe 2.
In the present embodiment, the first connection bridge 4 and the inlet port for communicating the intake pipe 1 and the single cell 31; the second connecting bridge 5 and the outlet end for communicating the outlet pipe 2 and the single cell 31. According to the embodiment of the application, the blind end of the air inlet pipe 1 extends out of the cell stack body 3, when air flow enters from the open end 11 of the air inlet pipe 1, a part of the air flow flows into the single cells 31 through the first connecting bridge 4, and the air flow which does not flow into the single cells 31 flows to the part of the blind end 12 of the air inlet pipe 1 extending out of the cell stack body 3, so that a vortex structure of the air flow generated by the part of the air inlet pipe 1 communicated with the single cells 31 is avoided, laminar flow of the air flow in the air inlet pipe 1 is ensured, the air flow can be uniformly distributed into the fuel cell stack, and the uniformity of the integral pressure drop of the fuel cell stack is ensured.
Referring to fig. 6, in the present embodiment, a third flow passage 16, a return flow passage 17, a second through hole 18, and a third through hole 19 are further provided in the intake pipe 1; the third flow channel 16 is arranged in parallel with the return flow channel 17; one end of the return passage 17, which is close to the open end 11 of the intake pipe 1, communicates with the third flow passage 16 through the second through hole 18; one end of the return passage 17, which is close to the blind end 12 of the air inlet pipe 1, is communicated with the third flow passage 16 through the third through hole 19.
In this embodiment, the return duct 17 can lead out the air flow entering from the third duct 16 to the blind end 12 of the air intake duct 1 via the third through-hole 19 and be supplemented to the inlet of the third duct 16 via the second through-hole 18. This causes the air flow in the air inlet duct 1 to form a circuit so that the air flow is redistributed into the cells via the third flow channels 16.
In the present embodiment, the distance between the second through hole 18 and the third through hole 19 is larger than the width of the cell stack body 3. This enables the air flow gathered at the blind end 12 of the air inlet duct 1 to be led back close to the open end 11 of the air inlet duct 1, so that the air flow can be redistributed between individual cells.
In this embodiment, the cross-sectional area of the return channel 17 is smaller than the cross-sectional area of the third channel 16. The air flow in the return channel 17 is always smaller than the air flow in the third channel 16, so that when the air flows from the return channel 17 to the third channel 16 again, the air flow laminar mode of the third channel 16 is not damaged, and the air flow can be uniformly distributed into the single cells 31.
Referring again to fig. 6, in the present embodiment, a flow blocking groove 171 is provided at an end of the return passage 17 away from the third through hole 19; the flow blocking groove 171 can block the air flow in the return passage 17 from leaking out and ensure that the return air flow can be smoothly returned into the third flow passage 16 through the second through hole 18.
In this embodiment, a plurality of second air inlet ports 161 adapted to the first connecting bridge 4 are disposed on a side of the third flow channel 16 close to the cell stack body 3.
In an embodiment, a plurality of the second air intake ports 161 are disposed along the length direction of the third flow channel 16, the second air intake ports 161 are communicated with the inlet of the first connecting bridge 4, and the outlet of the first connecting bridge 4 is communicated with the inlet of the single cell 31; the air flow in the third flow channel 16 can flow into the single cell 31 through the first connecting bridge 4 and finally into the air outlet pipe 2 through the second connecting bridge 5.
According to the fuel cell stack with the flow distribution function, the first flow channel 13 and the second flow channel 14 are arranged in the air inlet pipe 1 in parallel, and the first through hole 15 is formed in the blind end 12 of the air inlet pipe 1 to communicate the first flow channel 13 with the second flow channel 14, so that the vortex structure of air flow at the blind end 12 of the air inlet pipe 1 is avoided; meanwhile, the distribution of the air flow in the fuel cell stack can be adjusted by adjusting the air flow ratio of the first flow channel 13 and the second flow channel 14, so that the purpose of effectively distributing the air flow is achieved. By arranging the return channel 17 in the air inlet pipe 1, the air flow at the blind end 12 of the air inlet pipe 1 can be effectively led out and supplemented to the opening end 11 of the air inlet pipe 1, so that the air flow is effectively prevented from generating a vortex structure at the blind end 12 of the air inlet pipe 1, the air flow in the air inlet pipe 1 can form a loop, and finally, the air flow is redistributed among the single cells 31 of the fuel cell stack.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (7)
1. The fuel cell stack with the flow distribution function is characterized by comprising an air inlet pipe, an air outlet pipe and a cell stack body arranged between the air inlet pipe and the air outlet pipe; the air inlet pipe and the air outlet pipe are arranged in parallel; the end face of the opening end of the air inlet pipe extends out of one end of the battery pile body, and the end face of the blind end of the air inlet pipe extends out of the other end of the battery pile body; the battery pile body comprises a plurality of single cells which are arranged in parallel; a first connecting bridge is arranged between the inlet of the single cell and the air inlet pipe; a second connecting bridge is arranged between the outlet of the single cell and the air outlet pipe;
A straight flow channel is arranged in the air outlet pipe; the straight flow channel is provided with a plurality of air outlet interfaces matched with the second connecting bridge;
a first runner, a second runner and a first through hole are arranged in the air inlet pipe; the first flow channel and the second flow channel are arranged in parallel; one end of the first flow channel, which is close to the blind end of the air inlet pipe, is communicated with the second flow channel through the first through hole; or alternatively
A third runner, a return runner, a second through hole and a third through hole are further arranged in the air inlet pipe; the third flow channel is arranged in parallel with the return flow channel; one end of the return channel, which is close to the opening end of the air inlet pipe, is communicated with the third flow channel through the second through hole; one end of the return channel, which is close to the blind end of the air inlet pipe, is communicated with the third flow channel through the third through hole.
2. The fuel cell stack with flow distribution function according to claim 1, wherein the cross-sectional area of the first flow passage is smaller than the cross-sectional area of the second flow passage.
3. The fuel cell stack with flow distribution function according to claim 1, wherein a plurality of first air inlet interfaces matched with the first connecting bridge are arranged on one side of the second flow passage close to the cell stack body.
4. The fuel cell stack with flow distribution function according to claim 1, wherein a distance between the second through hole and the third through hole is larger than a width of the cell stack body.
5. The fuel cell stack with flow distribution function according to claim 1, wherein the cross-sectional area of the return flow passage is smaller than the cross-sectional area of the third flow passage.
6. The fuel cell stack with a flow distribution function according to claim 1, wherein an end of the return passage away from the third through hole is provided with a flow blocking groove.
7. The fuel cell stack with flow distribution function according to claim 1, wherein a plurality of second air inlet interfaces matched with the second connecting bridge are arranged on one side of the third flow passage close to the cell stack body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111274312.8A CN113871679B (en) | 2021-10-29 | 2021-10-29 | A fuel cell stack with flow distribution function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111274312.8A CN113871679B (en) | 2021-10-29 | 2021-10-29 | A fuel cell stack with flow distribution function |
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| CN113871679A CN113871679A (en) | 2021-12-31 |
| CN113871679B true CN113871679B (en) | 2024-11-22 |
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| CN115939478A (en) * | 2022-12-21 | 2023-04-07 | 上海氢晨新能源科技有限公司 | A stack structure and fuel cell |
| CN116417635A (en) * | 2023-05-30 | 2023-07-11 | 北京亿华通科技股份有限公司 | A fuel cell bipolar plate with anti-reflux function |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202474103U (en) * | 2012-02-03 | 2012-10-03 | 江苏华源氢能科技发展有限公司 | Fuel cell gas deflector structure |
| CN107658480A (en) * | 2017-08-25 | 2018-02-02 | 上海交通大学 | A kind of fuel-cell single-cell and pile of the enhancing of humiture uniformity |
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| US7816050B2 (en) * | 2007-02-16 | 2010-10-19 | Daimler Ag | Unit cell header flow enhancement |
| ES2480272T3 (en) * | 2009-03-13 | 2014-07-25 | Topsoe Fuel Cell A/S | Compression housing for a fuel cell stack and method for manufacturing a compression housing for a fuel cell stack |
| CN216354335U (en) * | 2021-10-29 | 2022-04-19 | 深圳市氢瑞燃料电池科技有限公司 | Fuel cell stack with flow distribution function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202474103U (en) * | 2012-02-03 | 2012-10-03 | 江苏华源氢能科技发展有限公司 | Fuel cell gas deflector structure |
| CN107658480A (en) * | 2017-08-25 | 2018-02-02 | 上海交通大学 | A kind of fuel-cell single-cell and pile of the enhancing of humiture uniformity |
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