CN113299941B - Proton exchange membrane fuel cell bipolar plate with parallelogram combined baffle - Google Patents
Proton exchange membrane fuel cell bipolar plate with parallelogram combined baffle Download PDFInfo
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- CN113299941B CN113299941B CN202110624706.5A CN202110624706A CN113299941B CN 113299941 B CN113299941 B CN 113299941B CN 202110624706 A CN202110624706 A CN 202110624706A CN 113299941 B CN113299941 B CN 113299941B
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- 239000000446 fuel Substances 0.000 title claims abstract description 19
- 239000012528 membrane Substances 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 36
- 239000007789 gas Substances 0.000 abstract description 17
- 239000000376 reactant Substances 0.000 abstract description 8
- 239000012495 reaction gas Substances 0.000 abstract description 8
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000009826 distribution Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 206010013496 Disturbance in attention Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009827 uniform distribution 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
-
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
-
- 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 provides a proton exchange membrane fuel cell bipolar plate with a parallelogram combined baffle, which comprises a bipolar plate body, wherein the top of the bipolar plate body is provided with an air inlet and an air inlet channel communicated with the air inlet, the bottom of the bipolar plate body is provided with an outlet and an exhaust channel communicated with the outlet, the bipolar plate body is internally provided with a parallelogram combined flow field, and the parallelogram combined flow field comprises a plurality of combined flow channels which are horizontally arranged and vertically arranged; the combined flow channel comprises a first main flow channel which is vertically arranged and sub flow channels which are symmetrically arranged on two sides of the first main flow channel, a second main flow channel is formed by a gap between two adjacent combined flow channels, and two ends of the sub flow channels are communicated with the first main flow channel and the second main flow channel. The combined flow channel has the functions of flow gathering and flow dividing, and promotes the reactant gas to be uniformly distributed in the whole flow field. Meanwhile, due to the turbulent flow effect of the baffle plate, the reaction gas is facilitated to enter the gas diffusion layer, and mass transfer is enhanced.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a bipolar plate, and especially relates to a proton exchange membrane fuel cell bipolar plate with a parallelogram combined baffle.
Background
The fuel cell is a device for directly converting chemical energy of fuel into electric energy, is a fourth generation power generation technology for carrying out hydroelectric power generation, thermal energy power generation and atomic power generation, and has the characteristics of cleanness, environmental protection, high efficiency and the like. The Proton Exchange Membrane Fuel Cell (PEMFC) has the advantages of low temperature operation, long service life, stable performance and the like, and is widely applied to the transportation fields of automobiles, ships and the like. Bipolar plates are the main component of fuel cells and have the function of collecting electrons and isolating the reactant gases and are therefore also called collector plates or separator plates. The flow field provided on the bipolar plate determines the distribution of the reactant gases within the fuel cell and also affects the drainage of the liquid water produced by the reaction. The distribution of the reaction gas can influence the electrochemical reaction rate and thus the local temperature; uneven distribution of the reactant gases can cause localized hot spot temperatures that affect cell performance and service life. The generated liquid water also affects the performance of the battery, and if the generated liquid water cannot be discharged in time, a battery flooding phenomenon can occur, so that the performance of the battery is rapidly reduced. Common flow field structures mainly comprise parallel flow fields, serpentine flow fields, interdigital flow fields, spiral flow fields and the like. Bipolar plates containing these flow fields have certain problems in terms of performance and require optimization and new designs.
1. Bipolar plates containing parallel flow fields. The parallel flow field has the advantages of simple structure, low processing cost, small pressure drop and the like, but due to low gas flow velocity and low gas utilization rate, liquid water cannot be discharged in time, one or more channels are blocked easily, and the performance of the battery is reduced.
2. Bipolar plates containing serpentine flow fields. The serpentine flow field is provided with a flow passage which can effectively discharge liquid water, but also causes overlarge pressure drop; the consumption of the reaction results in excessive concentration loss at the outlet, resulting in uneven distribution of the reaction gas.
3. Bipolar plates containing interdigitated flow fields. The cross flow field is composed of closed flow channels, and reactant gas is forced to flow under the ribs, so that the concentration of reactants in the gas diffusion layer is increased, and liquid water in the gas diffusion layer is discharged. But the pressure drop is large due to its closed flow path; meanwhile, when the air flow is large, the membrane electrode is damaged, and the battery is permanently damaged.
4. Bipolar plates containing spiral flow fields. The spiral flow field consists of spiral flow channels, and the centrifugal force effect generated when the reactant gas passes through the spiral flow field can strengthen the convection under the ribs of the reactant gas and enhance the mass transfer. However, the spiral flow field has large processing difficulty, small effective area and large pressure drop, so the spiral flow field is not suitable for wide application.
Disclosure of Invention
In order to solve the problems of uneven gas distribution, large pressure drop and liquid water discharge, a parallelogram combined baffle Proton Exchange Membrane Fuel Cell (PEMFC) bipolar plate is designed, and the parallelogram combined baffle in the bipolar plate has a turbulent flow effect to enhance mass transfer; the bipolar plates are symmetrically distributed as a whole, so that the uniform distribution of the reaction gas is ensured, and the long-term stable operation of the battery is further ensured. .
The invention adopts the following technical means:
The bipolar plate of the proton exchange membrane fuel cell with the parallelogram combined baffle comprises a bipolar plate body, wherein an air inlet and an air inlet channel communicated with the air inlet are arranged at the top of the bipolar plate body, an outlet and an exhaust channel communicated with the outlet are arranged at the bottom of the bipolar plate body, a parallelogram combined flow field is arranged in the bipolar plate body, and the parallelogram combined flow field comprises a plurality of combined flow channels which are horizontally arranged and vertically arranged;
The combined flow channel comprises a first main flow channel and sub flow channel groups symmetrically arranged on two sides of the first main flow channel, the sub flow channel groups comprise a plurality of sub flow channels which are sequentially arranged from top to bottom, one end, close to the first main flow channel, of each sub flow channel is communicated with the first main flow channel, a plurality of first sealing baffles which are sequentially arranged from top to bottom are arranged on the first main flow channel, the first sealing baffles seal the first main flow channel, the top of the first main flow channel is communicated with a sub air inlet arranged on the air inlet channel, and the bottom of the first main flow channel is communicated with the discharge channel;
A second main runner is formed adjacent to a gap between the two combined runners, and one end of the sub runner, which is close to the second main runner, is communicated with the second main runner; the second main runner is provided with a plurality of second sealing baffles which are sequentially arranged from top to bottom, the second sealing baffles seal the second main runner, the top of the second main runner is sealed by the second sealing baffles, and the bottom of the second main runner is sealed by the baffle at the outlet.
Preferably, an end of the sub flow passage remote from the first main flow passage is inclined obliquely upward.
Preferably, the included angle alpha between the sub-flow channel and the horizontal direction is 15-60 degrees.
Preferably, the first sealing baffle is V-shaped, and the angles of the two sides of the first sealing baffle inclined upwards are matched with the inclined angles of the sub-runners.
Preferably, the second sealing baffle is in an inverted V shape, and two sides of the second sealing baffle are parallel to two sides of the first sealing baffle.
Preferably the first main flow channel has a width of 1 to 3mm.
Preferably the width of the sub-flow channels is 0.5-1.5mm.
Preferably, the parallelogram combined flow field is formed by fixedly connecting a plurality of runner rib groups which are horizontally arranged with the bipolar plate body; gaps between two adjacent runner rib groups form the second main runner;
The flow channel rib group is formed by fixedly connecting a plurality of rib plate groups which are sequentially arranged from top to bottom with the bipolar plate body;
the rib plate group comprises a first rib plate group, a second rib plate group, the first sealing baffle and a third rib plate group which are sequentially arranged from top to bottom;
The first rib plate group, the second rib plate group and the third rib plate group respectively comprise two first rib plates, second rib plates and third rib plates which are symmetrically arranged left and right, the horizontal spacing between the two first rib plates, the two second rib plates and the two third rib plates is the same, and the spacing is the width of the first main runner; the gaps between the first rib plate and the second rib plate, the gaps between the second rib plate and the first sealing baffle plate, the gaps between the first sealing baffle plate and the third rib plate and the gaps between the third rib plate and the first rib plate on the same side form the sub-flow channels;
One ends of the two first rib plates, the two second rib plates and the two third rib plates, which are close to each other, are obliquely downwards arranged;
The end part of the first rib plate in the same rib plate group is fixedly connected with the end part of the first rib plate in the rib plate group horizontally adjacent to the rib plate group, so that the second sealing baffle plate is formed.
The baffle at the outlet is a triangular baffle.
The first rib plate, the second rib plate and the third rib plate are in a parallelogram structure.
Compared with the prior art, the invention has the following advantages:
1. The invention adopts the funnel-shaped inlet and the transverse inlet channels, can ensure that the reaction gas uniformly enters the flow field, and simultaneously improves the speed of entering the flow field, thereby improving the concentration of the reaction gas in the gas diffusion layer.
2. The combined flow channel has the functions of flow gathering and flow dividing, so that the reaction gas is uniformly distributed in the whole flow field. Meanwhile, due to the turbulent flow effect of the baffle plate, the reaction gas is facilitated to enter the gas diffusion layer, and mass transfer is enhanced.
3. Is beneficial to the discharge of liquid water.
4. The triangular baffle plate is adopted at the outlet of the flow field, which is favorable for smoothly discharging unreacted gas and generated liquid water and preventing the phenomenon of flooding of the battery.
For the reasons, the invention can be widely popularized in the fields of bipolar plates and the like.
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 some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a bipolar plate structure of a proton exchange membrane fuel cell with a parallelogram combined baffle according to an embodiment of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is an enlarged view of portion B of fig. 1 (with schematic view of the direction of gas flow).
Fig. 4 is a schematic view of rib plate set dimensions in an embodiment of the invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. 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 is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in fig. 1 to 4, a proton exchange membrane fuel cell bipolar plate with a parallelogram combined baffle comprises a bipolar plate body 1, wherein an air inlet 2 and an air inlet channel 3 communicated with the air inlet 2 are arranged at the top of the bipolar plate body 1, an outlet 11 and a discharge channel 10 communicated with the outlet 11 are arranged at the bottom of the bipolar plate body 1, a parallelogram combined flow field is arranged in the bipolar plate body 1, and the parallelogram combined flow field comprises a plurality of combined flow channels which are horizontally arranged and vertically arranged;
The combined runner comprises a first main runner 7 and sub runner groups symmetrically arranged on two sides of the first main runner 7, the sub runner groups comprise a plurality of sub runners 8 which are sequentially arranged from top to bottom, one end, close to the first main runner 7, of each sub runner 8 is communicated with the first main runner 7, a plurality of first sealing baffles 12 which are sequentially arranged from top to bottom are arranged on the first main runner 7, the first sealing baffles 12 seal the first main runner 7, the top of the first main runner 7 is communicated with a sub inlet 4 arranged on the air inlet channel 3, and the bottom of the first main runner 7 is communicated with the discharge channel 10;
A second main flow channel 13 is formed adjacent to the gap between the two combined flow channels, and one end of the sub flow channel 8 close to the second main flow channel 13 is communicated with the second main flow channel 13; the second main flow channel 13 is provided with a plurality of second sealing baffles 14 which are sequentially arranged from top to bottom, the second sealing baffles 14 seal the second main flow channel 13, the top of the second main flow channel 13 is sealed by the second sealing baffles 14, and the bottom of the second main flow channel 13 is sealed by the baffle 9 at the outlet.
Preferably, an end of the sub flow path 8 remote from the first main flow path 7 is inclined obliquely upward.
Preferably, the included angle alpha between the sub-flow channel 8 and the horizontal direction is 15-60 degrees.
Preferably, the first sealing baffle 12 is V-shaped, and the angles of the two sides of the first sealing baffle are inclined upwards to match the inclined angles of the sub-channels 8.
Preferably, the second sealing barrier 14 has an inverted V-shape, and both sides thereof are parallel to both sides of the first sealing barrier 12.
Preferably, the parallelogram combined flow field is formed by fixedly connecting a plurality of runner rib groups which are horizontally arranged with the bipolar plate body 1; gaps between two adjacent runner rib groups form the second main runner 12;
The flow channel rib group is formed by fixedly connecting a plurality of rib plate groups which are sequentially arranged from top to bottom with the bipolar plate body 1;
The rib plate group comprises a first rib plate group, a second rib plate group, the first sealing baffle 12 and a third rib plate group which are sequentially arranged from top to bottom;
The first rib plate group, the second rib plate group and the third rib plate group respectively comprise two first rib plates 5, second rib plates 6 and third rib plates 15 which are symmetrically arranged left and right, the horizontal spacing between the two first rib plates 5, the two second rib plates 6 and the two third rib plates 15 is the same, and the spacing is the width of the first main runner 7; the gaps between the first rib plate 5 and the second rib plate 6, the gaps between the second rib plate 6 and the first sealing baffle 12, the gaps between the first sealing baffle 12 and the third rib plate 15 and the gaps between the third rib plate 15 and the first rib 5 plate on the same side form the sub-flow channels 8;
One ends of the two first rib plates 5, the two second rib plates 6 and the two third rib plates 15, which are close to each other, are obliquely downwards arranged;
the end part of the first rib plate 5 in the same rib plate group is fixedly connected with the end part of the first rib plate 5 in the rib plate group horizontally adjacent to the rib plate group, so that the second sealing baffle 15 is formed.
The outlet baffle 9 is a triangular baffle.
The first rib plate 5, the second rib plate 6 and the third rib plate 15 are in a parallelogram structure.
The thickness a of the first rib 5, the second rib 6, the third rib 15, the first seal baffle 12 and the second seal baffle 14 is 0.5 to 1mm.
The width b of the first main runner 7 is 1-3 mm.
The width c of the sub-runner 8 is 0.5-1.5mm.
The length d of the second rib plate 6 and the third rib plate 15 is 2-5 mm.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. The bipolar plate of the proton exchange membrane fuel cell with the parallelogram combined baffle is characterized by comprising a bipolar plate body, wherein the top of the bipolar plate body is provided with an air inlet and an air inlet channel communicated with the air inlet, the bottom of the bipolar plate body is provided with an outlet and an exhaust channel communicated with the outlet, the bipolar plate body is internally provided with a parallelogram combined flow field, and the parallelogram combined flow field comprises a plurality of combined flow channels which are horizontally arranged and vertically arranged;
The combined flow channel comprises a first main flow channel and sub flow channel groups symmetrically arranged on two sides of the first main flow channel, the sub flow channel groups comprise a plurality of sub flow channels which are sequentially arranged from top to bottom, one end, close to the first main flow channel, of each sub flow channel is communicated with the first main flow channel, a plurality of first sealing baffles which are sequentially arranged from top to bottom are arranged on the first main flow channel, the first sealing baffles seal the first main flow channel, the top of the first main flow channel is communicated with a sub air inlet arranged on the air inlet channel, and the bottom of the first main flow channel is communicated with the discharge channel;
A second main runner is formed adjacent to a gap between the two combined runners, and one end of the sub runner, which is close to the second main runner, is communicated with the second main runner; the second main flow passage is provided with a plurality of second sealing baffles which are sequentially arranged from top to bottom, the second sealing baffles seal the second main flow passage, the top of the second main flow passage is sealed by the second sealing baffles, and the bottom of the second main flow passage is sealed by the baffle at the outlet;
The width of the first main flow passage is 1-3 mm;
the width of the sub-runner is 0.5-1.5mm.
2. A parallelogram combined baffle proton exchange membrane fuel cell bipolar plate as claimed in claim 1, wherein the end of the sub-runner remote from the first main runner is inclined obliquely upward.
3. A parallelogram combined baffle proton exchange membrane fuel cell bipolar plate as claimed in claim 2, wherein the angle α between the sub-flow channels and the horizontal direction is 15-60 °.
4. A parallelogram combined baffle proton exchange membrane fuel cell bipolar plate as claimed in claim 2 or 3, wherein the first sealing baffle is V-shaped, and the upward inclined angles of both sides of the first sealing baffle are matched with the inclined angles of the sub-channels.
5. The bipolar plate of a parallelogram combined baffle proton exchange membrane fuel cell of claim 4, wherein the second sealing baffle is inverted V-shaped with two sides parallel to two sides of the first sealing baffle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624706.5A CN113299941B (en) | 2021-06-04 | 2021-06-04 | Proton exchange membrane fuel cell bipolar plate with parallelogram combined baffle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110624706.5A CN113299941B (en) | 2021-06-04 | 2021-06-04 | Proton exchange membrane fuel cell bipolar plate with parallelogram combined baffle |
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| CN113299941A CN113299941A (en) | 2021-08-24 |
| CN113299941B true CN113299941B (en) | 2024-05-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113782763B (en) * | 2021-09-13 | 2023-04-07 | 浙江理工大学 | Gas flow passage structure for bipolar plate of proton exchange membrane fuel cell |
| CN114361502B (en) * | 2022-01-06 | 2023-10-10 | 江苏大学 | She Maiyan-based bionic proton exchange membrane fuel cell |
| CN115064720B (en) * | 2022-07-29 | 2023-05-05 | 中国人民解放军海军工程大学 | Triangular bipolar plate for fuel cell |
| CN115275269A (en) * | 2022-08-08 | 2022-11-01 | 大连理工大学 | Vein parallel flow field structure with gas distribution area and application of structure in fuel cell |
| CN115845761B (en) * | 2022-11-22 | 2024-04-02 | 大连海事大学 | Microchannel reaction plate |
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