CN210489736U - Flow field structure of fuel cell - Google Patents
Flow field structure of fuel cell Download PDFInfo
- Publication number
- CN210489736U CN210489736U CN201921653686.9U CN201921653686U CN210489736U CN 210489736 U CN210489736 U CN 210489736U CN 201921653686 U CN201921653686 U CN 201921653686U CN 210489736 U CN210489736 U CN 210489736U
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- China
- Prior art keywords
- flow field
- rib
- fuel cell
- channel
- plate rib
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- 239000000446 fuel Substances 0.000 title claims abstract description 26
- 239000011664 nicotinic acid Substances 0.000 claims description 11
- 230000003592 biomimetic effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 239000012495 reaction gas Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 208000032912 Local swelling Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
Images
Classifications
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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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- Fuel Cell (AREA)
Abstract
The utility model discloses a fuel cell's flow field structure, including the plate rib structure that constitutes the flow field, the bionical flow field of fishbone shape is formed through the fluting on the surface of every plate rib of plate rib structure, form including one section the straight line groove on the surface of plate rib, and be the multiunit side channel of V-arrangement shape structure symmetrical arrangement in straight line groove both sides, multiunit side channel interval arrangement. The utility model discloses a flow field is through locating the fluting at the board rib, through the contained angle that changes channel and air current direction for the air current sends the rib bottom through the channel more easily, thereby improves the gaseous not enough problem of rib department, and the liquid water of rib department accumulation can effectively be got rid of to the channel simultaneously, has avoided the water logging problem of negative pole rib department, thereby has improved fuel cell fuel's utilization efficiency and battery performance.
Description
Technical Field
The utility model relates to a proton exchange membrane fuel cell technical field especially relates to a fuel cell's flow field structure.
Background
The proton exchange membrane fuel cell has the advantages of high power density, high energy conversion efficiency and the like as a new energy device, and the flow field structure is used as an important factor influencing the performance of the proton exchange membrane fuel cell and can guide the flowing direction of reaction gas. The unreasonable flow field design can cause the reactant to react unevenly, the generated water cannot be discharged as soon as possible, the current density is distributed unevenly, and the phenomena of local overheating, water flooding, local swelling of the proton membrane and the like are generated. Therefore, reasonable flow field design is an important factor for improving the performance of the fuel cell.
Serpentine flow fields, straight channel flow fields, and interdigitated flow fields are common in current research. The serpentine flow field and the straight channel flow field are widely applied, but the utilization rate problem still waits to be solved, and the interdigital flow field has high requirements on gas inlet pressure although the advantages of gas utilization rate and power density improvement are great.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical defect who exists among the prior art, and provide a flow field structure of fuel cell negative pole, through the fluting of stainless steel metal sheet baffle rib department at negative pole bipolar plate to control channel and air current contained angle, thereby reach and more do benefit to reaction air current evenly distributed, and the liquid water exhaust effect of being more convenient for.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
a flow field structure of a fuel cell comprises a plate rib structure forming a flow field, wherein a fishbone-shaped bionic flow field is formed on the surface of each plate rib of the plate rib structure through a groove, the plate rib structure comprises a section of linear groove formed on the surface of the plate rib and a plurality of groups of side grooves symmetrically arranged on two sides of the linear groove in a V-shaped structure, and the side grooves are arranged at intervals.
Wherein the axis of the linear groove is coincident with or not coincident with the axis of the plate rib.
Wherein the length of the fishbone-shaped bionic flow field is less than that of the plate ribs.
And the V-shaped opening direction of a V-shaped structure formed by the side grooves of the fishbone-shaped bionic flow field points to the outlet direction of the flow field.
And the included angle between the side groove and the straight line groove is set according to specific conditions.
The utility model discloses a flow field is through locating the fluting at stainless steel metal sheet floor to through the contained angle that changes channel and air current direction, make the air current send the rib bottom through the channel more easily, thereby improve the gaseous not enough problem of rib department, the liquid water of rib department accumulation can effectively be got rid of to the channel simultaneously, has avoided the water logging problem of negative pole rib department, thereby has improved fuel cell fuel's utilization efficiency and battery performance.
Drawings
Fig. 1 is a schematic structural view of a fuel cell of the present invention;
FIG. 2 is a schematic structural diagram of a flow field plate of a cathode side ribbed hairtail-shaped bionic flow field;
fig. 3 is a partially enlarged schematic view of fig. 2.
In the figure: 1. anode bipolar plate 2, anode gas diffusion layer 3, anode catalyst layer 4, proton exchange membrane 5, cathode catalyst layer 6, cathode gas diffusion layer 7 and cathode bipolar plate.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the utility model provides a fuel cell system includes proton exchange membrane 4, anode catalysis layer 3, cathode catalysis layer 5, cathode gas diffusion layer 6, anode gas diffusion layer 2, anode bipolar plate 1 and cathode bipolar plate 7, wherein, cathode bipolar plate 7 is the flow field board in the bionical flow field of negative pole side rib strip fishbone shape, and the bionical flow field of fishbone shape includes that one section forms the linear groove 10 on the surface of plate rib 8 to and be the multiunit side groove of V-arrangement structure symmetrical arrangement in linear groove 10 both sides, multiunit side groove interval arrangement, wherein, every side groove forms a set of, two channels (11,12.) symmetrical arrangement, wherein, the floor 8 through linear type arrangement on the cathode 7 forms linear type cathode flow field passageway 9 to form straight way negative pole flow field.
In the utility model, the novel auxiliary fishbone-shaped bionic flow field design of the cathode of the fuel cell enables the air of the cathode main flow passage to smoothly enter the gas diffusion layer of the rib region through the channel, compared with the flow passage without the slot, the condition that the reaction gas in the region is insufficient is effectively relieved, the condition that the reaction gas in the region is insufficient is improved, the uniformity of the whole normal airflow distribution of the fuel cell is further improved, and the utilization rate of the reaction gas is improved; in the fuel cell, air enters the fuel cell through the cathode air inlet, and smoothly enters the gas diffusion layer in the area below the rib through the channel when reaching the cathode bipolar plate, so that the problem that the air flow cannot be uniformly distributed is effectively solved.
It should be noted that, in the present invention, an axis of the linear groove may be identical to or different from an axis of the plate rib. Preferably, the cross section of the linear groove is a rectangular groove.
The length of the fishbone-shaped bionic flow field is smaller than that of the plate rib, and can be half of the length of the plate rib or other lengths, and the fishbone-shaped bionic flow field is designed according to specific conditions.
And the V-shaped opening direction of a V-shaped structure formed by the side grooves of the fishbone-shaped bionic flow field points to the outlet direction of the flow field. Preferably, the side grooves have the same width and the same depth as the linear grooves. The width of the straight line groove is smaller than the width of the upper surface of the plate rib, and can be a quarter to a third of the width of the upper surface of the plate rib, or other parameters, particularly but not limited to, the depth is a quarter to a third of the height of the plate rib
The included angle between the side groove and the straight line groove can be optimized to form a required included angle, the design is optimized between 0 and 90 degrees, and the included angle is specifically set according to specific conditions.
As an embodiment, the utility model discloses in, cathode bipolar plate 7 is stainless steel sheet metal material, and whole length and width is 5cm respectively, and the runner length and width is 1 x 1mm, has set up a long channel for 0.2mm at every 3mm interval on the baffle to change the angle of inclination at channel edge into 30, like this, can make the air current get into the channel more easily, make the liquid water that the rib goes out get rid of simultaneously, more abundant utilization the runner space, improved the utilization ratio.
Further, the utility model discloses, through optimizing channel edge shape and its interval to the bionic flow field of fishbone shape, change channel edge angle and airflow direction's contained angle, more ordinary 90 channel edge angles compare, because the existence of contained angle makes the air current get into the channel more easily to make liquid water change in the outflow channel, effectively avoided the porous electrode pore of fuel cell that negative plate department water logging problem arouses to block up the problem, thereby improved the efficiency of fuel cell reaction.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The flow field structure of the fuel cell is characterized by comprising a plate rib structure forming a flow field, wherein a fishbone-shaped bionic flow field is formed on the surface of each plate rib of the plate rib structure through a groove, the plate rib structure comprises a section of linear groove formed on the surface of the plate rib and a plurality of groups of side grooves symmetrically arranged on two sides of the linear groove in a V-shaped structure, and the side grooves are arranged at intervals.
2. The fuel cell flow field structure according to claim 1, wherein an axis of the linear groove coincides with or does not coincide with an axis of the plate rib.
3. The fuel cell flow field structure of claim 1, wherein the length of the fishbone-shaped biomimetic flow field is less than the length of the plate ribs.
4. The flow field structure of a fuel cell according to claim 1, wherein a V-shaped opening direction of a V-shaped structure formed by the side grooves of the fishbone-shaped bionic flow field points to an outlet direction of the flow field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921653686.9U CN210489736U (en) | 2019-09-30 | 2019-09-30 | Flow field structure of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921653686.9U CN210489736U (en) | 2019-09-30 | 2019-09-30 | Flow field structure of fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210489736U true CN210489736U (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921653686.9U Expired - Fee Related CN210489736U (en) | 2019-09-30 | 2019-09-30 | Flow field structure of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210489736U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571451A (en) * | 2019-09-30 | 2019-12-13 | 天津商业大学 | Flow field structure of fuel cell |
| CN116014168A (en) * | 2023-02-16 | 2023-04-25 | 山东大学 | Fuel cell flow field plate |
-
2019
- 2019-09-30 CN CN201921653686.9U patent/CN210489736U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571451A (en) * | 2019-09-30 | 2019-12-13 | 天津商业大学 | Flow field structure of fuel cell |
| CN116014168A (en) * | 2023-02-16 | 2023-04-25 | 山东大学 | Fuel cell flow field plate |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200508 |