CN214797473U - Double polar plate of proton exchange film fuel cell with parallelogram combined baffle - Google Patents
Double polar plate of proton exchange film fuel cell with parallelogram combined baffle Download PDFInfo
- Publication number
- CN214797473U CN214797473U CN202121244547.8U CN202121244547U CN214797473U CN 214797473 U CN214797473 U CN 214797473U CN 202121244547 U CN202121244547 U CN 202121244547U CN 214797473 U CN214797473 U CN 214797473U
- Authority
- CN
- China
- Prior art keywords
- flow channel
- baffle
- main flow
- sub
- parallelogram
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Fuel Cell (AREA)
Abstract
The utility model provides a parallelogram combined baffle proton exchange membrane fuel cell bipolar plate, 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 a discharge channel communicated with the outlet, 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 channels, wherein the first main flow channel is vertically arranged, the sub-flow channels are symmetrically arranged on two sides of the first main flow channel, a second main flow channel is formed in a gap between two adjacent combined flow channels, and two ends of each sub-flow channel are communicated with the first main flow channel and the second main flow channel. The utility model discloses a combination runner has and gathers and flows and reposition of redundant personnel effect, makes reaction gas evenly distributed at whole flow field. Meanwhile, due to the turbulent flow effect of the baffle, reaction gas can enter the gas diffusion layer, and mass transfer is enhanced.
Description
Technical Field
The utility model relates to a fuel cell technical field particularly is a bipolar plate, especially relates to a parallelogram combination baffle proton exchange membrane fuel cell bipolar plate.
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 following water conservancy power generation, heat energy power generation and atomic power generation, and has the performance 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 fields of traffic transportation such as automobiles, ships and the like. The bipolar plate is a main component of the fuel cell, has a function of collecting electrons and isolating reaction gas, and is also called a current collecting plate or a separator. The flow field provided on the bipolar plate can determine the distribution of reaction gas in the fuel cell and influence the discharge of liquid water generated by the reaction. The distribution of the reactant gas affects the rate of the electrochemical reaction, and thus the local temperature; non-uniform distribution of reactant gases can cause local 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 occurs, resulting in rapid degradation of the performance of the battery. The common flow field structure mainly includes a parallel flow field, a serpentine flow field, an interdigitated flow field, a spiral flow field, and the like. However, bipolar plates containing these flow fields have certain performance issues that require optimization and new design.
1. A bipolar plate comprising parallel flow fields. The parallel flow field has the advantages of simple structure, low processing cost, small pressure drop and the like, but because the gas flow rate is low, the gas utilization rate is low, liquid water cannot be discharged in time, one or more channels are easy to block, and the performance of the battery is reduced.
2. A bipolar plate comprising a serpentine flow field. The serpentine flow field is provided with a flow channel, so that liquid water can be effectively discharged, but the pressure drop of the serpentine flow field is also overlarge; the loss of concentration at the outlet is too great due to the consumption of the reaction, resulting in an uneven distribution of the reaction gas.
3. A bipolar plate comprising interdigitated flow fields. The interdigitated flow field is composed of closed flow channels, so that reaction gas is forced to flow in a convection mode under the ribs, 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 the closed flow channel; meanwhile, when the air flow is large, the membrane electrode can be damaged, and the battery can be permanently damaged.
4. A bipolar plate comprising a spiral flow field. The spiral flow field is composed of spiral flow channels, and the centrifugal force generated when the reaction gas passes through the spiral flow field can strengthen the under-rib convection of the reaction gas and enhance the mass transfer. However, the spiral flow field is difficult to process, has small effective area and large pressure drop, and is not suitable for wide application.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of uneven gas distribution, large pressure drop and liquid water discharge, a double-pole plate of a Proton Exchange Membrane Fuel Cell (PEMFC) with a parallelogram combined baffle is designed, and the parallelogram combined baffle in the double-pole plate has a turbulent flow effect and enhances mass transfer; the bipolar plates are symmetrically distributed on the whole, so that the reaction gas is uniformly distributed, and the long-term stable operation of the battery is further ensured. .
The utility model discloses a technical means as follows:
a double polar plate of proton exchange membrane fuel cell with parallelogram combination baffle comprises a double polar plate body, wherein the top of the double polar plate body is provided with an air inlet and an air inlet channel communicated with the air inlet, the bottom of the double polar plate body is provided with an outlet and a discharge channel communicated with the outlet, a parallelogram combination flow field is arranged in the double polar plate body, and the parallelogram combination flow field comprises a plurality of combination 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, each sub-flow channel group comprises a plurality of sub-flow channels 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 sequentially arranged from top to bottom are arranged on the first main flow channel, the first sealing baffles block 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 flow channel is formed in a gap between two adjacent combined flow channels, and one end of each sub-flow channel, which is close to the second main flow channel, is communicated with the second main flow channel; be equipped with a plurality of second seal baffle that from top to bottom arrange in proper order on the second sprue, the shutoff of second seal baffle the second sprue, the top quilt of second sprue the second seal baffle is sealed, just the bottom of second sprue is sealed by the exit baffle.
Preferably, one end of the sub-flow passage away from the first main flow passage is inclined obliquely upwards.
Preferably, the included angle α between the sub-flow channels and the horizontal direction is 15-60 °.
Preferably, the first sealing baffle is in a V shape, and the upward inclined angles of the two sides of the first sealing baffle are matched with the inclined angle of the sub-flow channel.
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 width of the first main flow channel is 1-3 mm.
Preferably, the width of the sub-flow channel is 0.5-1.5 mm.
Preferably, the parallelogram combined flow field is formed by fixedly connecting a plurality of horizontally arranged flow channel rib groups with the bipolar plate body; the second main flow channel is formed by a gap between two adjacent flow channel rib groups;
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, a first sealing baffle and a third rib plate group which are arranged from top to bottom in sequence;
the first rib plate group, the second rib plate group and the third rib plate group respectively comprise two first rib plates, two second rib plates and two third rib plates which are arranged in a bilateral symmetry mode, the horizontal distances among the two first rib plates, the two second rib plates and the two third rib plates are the same, and the distances are the width of the first main runner; a gap between the first rib plate and the second rib plate, a gap between the second rib plate and the first sealing baffle plate, a gap between the first sealing baffle plate and the third rib plate, and a gap between the third rib plate and the first rib plate on the same side form the sub-flow passage;
one ends, close to the two first rib plates, the two second rib plates and the two third rib plates, of the two first rib plates, the two second rib plates and the two third rib plates are obliquely arranged downwards;
the end of the first rib in the same rib group is fixedly connected with the end of the first rib in the rib group horizontally adjacent to the rib group to form the second sealing baffle.
The baffle at the outlet is a triangular baffle.
The first rib plate, the second rib plate and the third rib plate are of parallelogram structures.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses a leak hopper-shaped and admit air and divide the import, combine horizontal inlet channel to guarantee that reaction gas evenly gets into the flow field, improve the speed that gas got into the flow field simultaneously, and then improve the intraformational reaction gas's of gas diffusion concentration.
2. The combined flow channel has the functions of flow gathering and flow dividing, and promotes reaction gas to be uniformly distributed in the whole flow field. Meanwhile, due to the turbulent flow effect of the baffle, reaction gas can enter the gas diffusion layer, and mass transfer is enhanced.
3. Is beneficial to the discharge of liquid water.
4. A triangular baffle is adopted at the outlet of the flow field, so that unreacted gas and generated liquid water can be smoothly discharged, and the phenomenon of flooding of the battery is prevented.
Based on the reason, the utility model discloses can extensively promote in fields such as bipolar plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a bipolar plate of a proton exchange membrane fuel cell with a parallelogram combination 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 the portion B in fig. 1 (with a schematic view of the gas flow direction).
Fig. 4 is a schematic size diagram of a rib group according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in 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 obvious 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 illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present 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 example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the 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. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship 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 of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 4, a bipolar plate of a proton exchange membrane fuel cell with a parallelogram combination baffle comprises a bipolar plate body 1, wherein the top of the bipolar plate body 1 is provided with an air inlet 2 and an air inlet channel 3 communicated with the air inlet 2, the bottom of the bipolar plate body 1 is provided with an outlet 11 and a discharge channel 10 communicated with the outlet 11, a parallelogram combination flow field is arranged in the bipolar plate body 1, and the parallelogram combination flow field comprises a plurality of combination flow channels which are horizontally arranged and vertically arranged;
the combined flow channel comprises a first main flow channel 7 and sub-flow channel groups symmetrically arranged on two sides of the first main flow channel 7, each sub-flow channel group comprises a plurality of sub-flow channels 8 sequentially arranged from top to bottom, one end, close to the first main flow channel 7, of each sub-flow channel 8 is communicated with the first main flow channel 7, a plurality of first sealing baffles 12 sequentially arranged from top to bottom are arranged on the first main flow channel 7, the first sealing baffles 12 seal the first main flow channel 7, the top of the first main flow channel 7 is communicated with sub-air inlets 4 arranged on the air inlet channel 3, and the bottom of the first main flow channel 7 is communicated with the discharge channel 10;
a second main flow channel 13 is formed in a gap between two adjacent 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; be equipped with a plurality of second seal baffle 14 that from top to bottom arrange in proper order on the second sprue 13, the shutoff of second seal baffle 14 the second sprue 13, the top quilt of second sprue 13 the second seal baffle 14 is sealed, just the bottom of second sprue 13 is sealed by exit baffle 9.
Preferably, one end of the sub-flow passage 8 away from the first main flow passage 7 is inclined obliquely upwards.
Preferably, the included angle α between the sub-flow channel 8 and the horizontal direction is 15-60 °.
Preferably, the first sealing baffle 12 is V-shaped, and the angle of the two sides of the first sealing baffle which are inclined upwards is matched with the angle of inclination of the sub-flow channel 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 horizontally arranged flow channel rib groups with the bipolar plate body 1; the second main flow channel 12 is formed by the gap between two adjacent flow channel rib groups;
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 arranged from top to bottom in sequence;
the first rib plate group, the second rib plate group and the third rib plate group respectively comprise two first rib plates 5, two second rib plates 6 and two third rib plates 15 which are arranged in a bilateral symmetry manner, the horizontal intervals among the two first rib plates 5, the two second rib plates 6 and the two third rib plates 15 are the same, and the intervals are the width of the first main runner 7; the sub flow path 8 is formed by a gap between the first rib 5 and the second rib 6, a gap between the second rib 6 and the first seal baffle 12, a gap between the first seal baffle 12 and the third rib 15, and a gap between the third rib 15 and the first rib 5 on the same side;
the ends of the two first ribs 5, the two second ribs 6 and the two third ribs 15 which are close to each other are arranged obliquely downwards;
the end of the first rib 5 in the same rib group is fixedly connected with the end of the first rib 5 in the rib group horizontally adjacent to the rib group to form the second sealing baffle 15.
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 thicknesses a of the first rib 5, the second rib 6, the third rib 15, the first seal dam 12, and the second seal dam 14 are 0.5 to 1 mm.
The width b of the first main flow channel 7 is 1-3 mm.
The width c of the sub-flow passage 8 is 0.5-1.5 mm.
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 used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (7)
1. A double-pole plate of a proton exchange membrane fuel cell with a parallelogram combined baffle plate is characterized by comprising a double-pole plate body, wherein the top of the double-pole plate body is provided with an air inlet and an air inlet channel communicated with the air inlet, the bottom of the double-pole plate body is provided with an outlet and a discharge channel communicated with the outlet, a parallelogram combined flow field is arranged in the double-pole 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, each sub-flow channel group comprises a plurality of sub-flow channels 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 sequentially arranged from top to bottom are arranged on the first main flow channel, the first sealing baffles block 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 flow channel is formed in a gap between two adjacent combined flow channels, and one end of each sub-flow channel, which is close to the second main flow channel, is communicated with the second main flow channel; be equipped with a plurality of second seal baffle that from top to bottom arrange in proper order on the second sprue, the shutoff of second seal baffle the second sprue, the top quilt of second sprue the second seal baffle is sealed, just the bottom of second sprue is sealed by the exit baffle.
2. The bipolar plate of a proton exchange membrane fuel cell with a parallelogram combination baffle as claimed in claim 1, wherein an end of the sub-flow channel away from the first main flow channel is inclined obliquely upward.
3. The bipolar plate of a proton exchange membrane fuel cell with a parallelogram combination baffle as claimed in claim 2, wherein the included angle α of the sub-flow channels with the horizontal direction is 15-60 °.
4. The bipolar plate of a proton exchange membrane fuel cell with a parallelogram combination baffle as claimed in claim 2 or 3, wherein the first sealing baffle is V-shaped, and the upward-inclined angle of the two sides of the first sealing baffle is matched with the inclined angle of the sub-flow channel.
5. The bipolar plate of a proton exchange membrane fuel cell with a parallelogram combination baffle as claimed in claim 4, wherein the second sealing baffle is in an inverted V shape with two sides parallel to two sides of the first sealing baffle.
6. The bipolar plate of a proton exchange membrane fuel cell with a parallelogram combination baffle as claimed in claim 1, wherein the width of the first main flow channel is 1-3 mm.
7. The bipolar plate of a proton exchange membrane fuel cell with a parallelogram combination baffle as claimed in claim 1, wherein the width of the sub-flow channel is 0.5-1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121244547.8U CN214797473U (en) | 2021-06-04 | 2021-06-04 | Double polar plate of proton exchange film fuel cell with parallelogram combined baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121244547.8U CN214797473U (en) | 2021-06-04 | 2021-06-04 | Double polar plate of proton exchange film fuel cell with parallelogram combined baffle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214797473U true CN214797473U (en) | 2021-11-19 |
Family
ID=78700480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121244547.8U Active CN214797473U (en) | 2021-06-04 | 2021-06-04 | Double polar plate of proton exchange film fuel cell with parallelogram combined baffle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214797473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113299941A (en) * | 2021-06-04 | 2021-08-24 | 大连海事大学 | Double polar plate of proton exchange film fuel cell with parallelogram combined baffle |
-
2021
- 2021-06-04 CN CN202121244547.8U patent/CN214797473U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113299941A (en) * | 2021-06-04 | 2021-08-24 | 大连海事大学 | Double polar plate of proton exchange film fuel cell with parallelogram combined baffle |
| CN113299941B (en) * | 2021-06-04 | 2024-05-03 | 大连海事大学 | Proton exchange membrane fuel cell bipolar plate with parallelogram combined baffle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113314726B (en) | Arrow-feather-shaped bipolar plate of proton exchange membrane fuel cell | |
| CN113299941B (en) | Proton exchange membrane fuel cell bipolar plate with parallelogram combined baffle | |
| CN104218252B (en) | Flat solid oxide fuel cell pile device | |
| CN101944618A (en) | Tree-structured flow field proton exchange membrane fuel cell bipolar plate | |
| CN112331880B (en) | Dead end plate of fuel cell and fuel cell | |
| TW201820692A (en) | Bipolar plate structure having optimized gas flow channel | |
| CN214797473U (en) | Double polar plate of proton exchange film fuel cell with parallelogram combined baffle | |
| CN113140748A (en) | Spiral bucket-shaped fuel cell bipolar plate | |
| CN110828843A (en) | Bipolar plate of fuel cell | |
| CN215771215U (en) | Battery bipolar plate distribution head, proton exchange membrane fuel cell and unmanned sailing boat | |
| CN214797474U (en) | Arrow-feather-shaped bipolar plate of proton exchange membrane fuel cell | |
| CN109616685A (en) | A kind of fuel cell bipolar plate structure | |
| CN206931655U (en) | A kind of bipolar plates for increasing exchange membrane effective area | |
| CN206711974U (en) | A kind of novel flat intermediate temperature solid oxide fuel cell pile | |
| CN103872352B (en) | Flat solid oxide fuel cell stack and cell connecting piece thereof | |
| CN109830704B (en) | Hydrogen fuel cell bipolar plate based on tree-shaped flow channel structure | |
| CN217114451U (en) | Polar plate and fuel cell | |
| CN116826094A (en) | Flow guiding type porous flow passage for hydrogen fuel cell and bipolar plate structure | |
| CN115692759A (en) | Flow field structure of bipolar plate of fuel cell | |
| CN215070063U (en) | Pisces bionic fuel cell bipolar plate | |
| CN215070064U (en) | Spiral bucket-shaped fuel cell bipolar plate | |
| CN111916797B (en) | Water separator and fuel cell system | |
| CN210379269U (en) | Bipolar plate of fuel cell | |
| CN113013437A (en) | Fuel cell cathode flow channel with gradually-reduced slope surface structure | |
| CN110165242A (en) | A kind of PEM cell flow field plate structure of multi-level width of flow path |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |