CN114243048A - Fuel cell composite structure polar plate - Google Patents
Fuel cell composite structure polar plate Download PDFInfo
- Publication number
- CN114243048A CN114243048A CN202111346123.7A CN202111346123A CN114243048A CN 114243048 A CN114243048 A CN 114243048A CN 202111346123 A CN202111346123 A CN 202111346123A CN 114243048 A CN114243048 A CN 114243048A
- Authority
- CN
- China
- Prior art keywords
- flow field
- anode
- outlet
- plate
- cathode
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 7
- 210000000078 claw Anatomy 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 229920005992 thermoplastic resin Polymers 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 5
- 239000011345 viscous material Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 239000007788 liquid Substances 0.000 abstract description 9
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003075 superhydrophobic effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H01M8/023—Porous and characterised by the material
- H01M8/0239—Organic resins; Organic polymers
-
- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1007—Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
-
- 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
- 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 fuel cell composite structure polar plate, which relates to the field of fuel cells and comprises a cathode plate, a membrane electrode and an anode plate which are sequentially overlapped, wherein a cathode channel is formed between the cathode plate and the membrane electrode, an anode channel is formed between the anode plate and the membrane electrode, flow field substrates are embedded at two ends of the cathode plate and the anode plate and are made of hydrophobic materials, a flow field outlet and a flow field outlet channel communicated with the flow field outlet are arranged on the flow field substrates, and the flow field outlet channel is embedded and clamped with the inlet and the outlet of the cathode and the anode. By arranging the flow field substrate made of the hydrophobic material, the resin flow field has a water contact angle of more than 100 degrees, so that liquid water and generated water which are sucked back in the public channel can be prevented from being frozen fast near an outlet, the phenomenon that the electric pile is started after the liquid water is frozen is avoided, and meanwhile, the water sucking back is reduced, so that the gas pressure loss of the battery can be reduced, and the air input of the battery is ensured to be sufficient.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell composite structure polar plate.
Background
Fuel cell power systems convert fuel and oxidant into electricity. One type of fuel cell power system employs a proton exchange membrane (hereinafter "PEM") to catalytically facilitate the reaction of a fuel (e.g., hydrogen) and an oxidant (e.g., air or oxygen) to generate electricity. The PEM is a solid polymer electrolyte that facilitates the migration of protons from the anode to the cathode in each individual fuel cell of a group of fuel cells typically employed in fuel cell power systems.
In a typical fuel cell stack of a fuel cell power system, individual fuel cells form channels through which various reactants and cooling fluids flow, i.e., cathode channels and anode channels in the present application.
However, there are two problems with cold start of a vehicle fuel cell stack: first, in the region where the air temperature is low, the generated water in the reaction region (cathode channel and anode channel) condenses into ice when it reaches the outlet, thereby blocking the outlet and causing failure in the secondary start-up. And secondly, residual water in the outlet public channel after starting and stopping can be sucked back to the position near the outlet, and can be frozen into ice under the freezing point condition to cause the next starting failure.
The heating plate is usually used to heat the stack at start-up, but the heating plate consumes much energy, and increases cost and volume.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a fuel cell composite structure polar plate, which solves the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a fuel cell composite structure polar plate comprises a cathode plate, a membrane electrode and an anode plate which are sequentially overlapped, wherein a cathode channel is formed between the cathode plate and the membrane electrode, an anode channel is formed between the anode plate and the membrane electrode, flow field substrates are inlaid at two ends of the cathode plate and the anode plate and are made of hydrophobic materials, and during actual production, a 3D printing process (small-batch production) or die-sinking forging (large-batch production) can be used. The flow field substrate is provided with a flow field outlet and a flow field outlet channel communicated with the flow field outlet, and the flow field outlet channel is embedded and clamped with the inlet and the outlet of the cathode and the anode.
Preferably, the two ends of the cathode channel are a cathode inlet and a cathode outlet, the two ends of the anode channel are an anode inlet and an anode outlet, the flow field outlet channel can be embedded into the cathode inlet or the cathode outlet or the anode inlet or the anode outlet, and the flow field substrate is provided with a fixing claw for being clamped at the inlet and the outlet.
Preferably, the material of the flow field substrate is thermoplastic resin.
Preferably, the flow field substrate is adhered to the gaps between the cathode plate and the anode plate by adhesive materials.
Preferably, the cathode channel and the anode channel are coated with hydrophilic coatings.
(III) advantageous effects
The invention provides a fuel cell composite structure polar plate. The method has the following beneficial effects:
1. the flow field substrate made of hydrophobic materials is arranged on the fuel cell composite structure polar plate, and the water contact angle is more than 140 degrees, so that liquid water in the public channel can be prevented from being sucked backwards. At the same time, the freezing of water near the channel exit can be prolonged, allowing sufficient time for the liquid water to drain out of the cell before it condenses into ice.
Drawings
FIG. 1 is a schematic view of the overall split structure of the present invention;
FIG. 2 is a schematic view of a flow field substrate of the present invention;
FIG. 3 is a partial view of a flow field substrate and bipolar plate insert of the present invention;
FIG. 4 is a graph of contact angle versus condensation temperature for the present invention;
FIG. 5 is a comparison of calculated values of drainage effect according to the present invention;
FIG. 6 is a graph comparing intake air split before and after modification of the present invention;
FIG. 7 is a graph of a flow field outlet channel distribution variation of the present invention;
FIG. 8 is a graph of the variation of the width of the flow field outlet channels of the present invention;
FIG. 9 is a cross-sectional shape variation of flow field outlet channels of the present invention;
fig. 10 is a diagram of the shape change of the flow field outlet channels of the present invention.
In the figure: the device comprises a cathode plate 1, a membrane electrode 2, an anode plate 3, a cathode channel 4, a cathode inlet 41, a cathode outlet 42, an anode channel 5, an anode inlet 51, an anode outlet 52, a flow field substrate 6, a flow field outlet 61, a flow field outlet channel 7 and a fixing claw 8.
Detailed Description
An embodiment of the present invention provides a fuel cell composite structure polar plate, as shown in fig. 1-10, including a cathode plate 1, a membrane electrode 2, and an anode plate 3, which are sequentially stacked, a cathode channel 4 is formed between the cathode plate 1 and the membrane electrode 2, and an anode channel 5 is formed between the anode plate 3 and the membrane electrode 2, which is the prior art.
Flow field base plates 6 are embedded at two ends of the cathode plate 1 and the anode plate 3, the flow field base plates 6 are formed by 3D printing of hydrophobic materials, and the flow field base plates 6 are made of thermoplastic resin. Specifically PP PTFE PPS PEEK in the thermoplastic resin. The 3D printed flow field substrate 6 has a super-hydrophobic surface coupling minimum aperture to prevent suck-back, and meanwhile, the thickness of the flow field substrate 6 can be adjusted to make up possible pores between the membrane electrode 2 and the polar plate in the cell, so that the cell structure is stable.
The 3D printed flow field substrate 6 is based on the technology that liquid water is not frozen at ultralow temperature: (1) liquid water freezing time control technology coupling based on heterogeneous nucleus generation theory. (2) Based on the composite structure polar plate manufacturing technology.
In particular, liquid water condensation rate
As shown in fig. 4, the contact angle of the flow field of the conventional metal material is 50 to 60 °, and the condensation temperature is lower than-20 °. The contact angle of the composite polar plate is 100-170 degrees, and the condensation temperature can reach-50 degrees.
As shown in fig. 5, the drainage effect of the battery cell assembled with the composite-structured plate was compared with that of the conventional battery (here, the experimental subject was the toyota MIRAI2 generation). The surface of a continuous drainage channel is formed in the resin material flow field, and the residual water in the battery is reduced by more than 50% compared with a product sold in the market.
By arranging the flow field substrate 6 made of hydrophobic materials, the flow field has a water contact angle of more than 140 degrees, so that liquid water in the cathode channel 4 and the anode channel 5 of the common channel can be prevented from being sucked back. At the same time, the freezing of water near the channel exit can be prolonged, allowing sufficient time for the liquid water to drain out of the cell before it condenses into ice.
The flow field substrate 6 is provided with a flow field outlet 61 and a flow field outlet channel 7 communicated with the flow field outlet 61, and the flow field outlet channel 7 is embedded and clamped with the inlet and the outlet of the cathode and the anode. The gap between the flow field substrate 6 and the cathode plate 1 and the anode plate 3 is adhered by the adhesive material, so as to prevent water leakage in the gap.
As shown in fig. 7, the distribution position of the flow field outlet channels 7 on the flow field substrate 6 is not limited to one side, but may be distributed on any side of the flow field substrate 6 outside the flow field outlet 61, depending on the structure of the plate.
As shown in fig. 8-10, the width of the flow field outlet channel 7 can be freely changed according to actual requirements; the cross section shape of the flow field outlet channel 7 can be freely changed according to actual requirements; the shape of the flow field outlet channels 7 is not limited to a straight line and may be curved or otherwise. The width of the flow field outlet channels 7 can vary freely and can be conical.
As shown in fig. 3, the two ends of the cathode channel 4 are a cathode inlet 41 and a cathode outlet 42, the two ends of the anode channel 5 are an anode inlet 51 and an anode outlet 52, the flow field outlet channel 7 can be inserted into the cathode inlet 41 or the cathode outlet 42 or the anode inlet 51 or the anode outlet 52, and the flow field substrate 6 is provided with a fixing claw 8 for being clamped at the inlet and the outlet. The fixing claws 8 are used for embedding the flow field substrate 6 with the cathode plate 1 and the anode plate 3, and preventing the flow field substrate 6 from falling off.
The cathode channels 4 and the anode channels 5 are coated with hydrophilic coatings. The hydrophilic coating is silicon oxide. By providing a hydrophilic coating, the transport of water in the cathode channels 4 and the anode channels 5 can be facilitated.
As shown in fig. 6, the reduction in the suck-back water reduces the intake air flow resistance of the cells, thereby increasing the intake air distribution ratio between the cells in the stack.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a fuel cell composite construction polar plate, includes negative plate (1), membrane electrode (2), anode plate (3) that coincide in proper order, be formed with cathode channel (4) between negative plate (1) and membrane electrode (2), be formed with anode channel (5) between anode plate (3) and membrane electrode (2), its characterized in that: flow field base plates (6) are inlaid at two ends of the cathode plate (1) and the anode plate (3), the flow field base plates (6) are made of hydrophobic materials, flow field outlets (61) and flow field outlet channels (7) communicated with the flow field base plates are arranged on the flow field base plates (6), and the flow field outlet channels (7) are inlaid in the inlet and outlet of the cathode and the anode.
2. A fuel cell composite construction plate as set forth in claim 1, wherein: the two ends of the cathode channel (4) are provided with a cathode inlet (41) and a cathode outlet (42), the two ends of the anode channel (5) are provided with an anode inlet (51) and an anode outlet (52), the flow field outlet channel (7) can be embedded into the cathode inlet (41) or the cathode outlet (42) or the anode inlet (51) or the anode outlet (52), and the flow field substrate (6) is provided with a fixing claw (8) used for being clamped at the inlet and the outlet.
3. A fuel cell composite construction plate as set forth in claim 1, wherein: the material of the flow field substrate (6) is thermoplastic resin.
4. A fuel cell composite construction plate as set forth in claim 1, wherein: and the flow field substrate (6) is adhered to the inlaid gaps of the cathode plate (1) and the anode plate (3) through a viscous material.
5. A fuel cell composite construction plate as set forth in claim 1, wherein: hydrophilic coatings are coated in the cathode channel (4) and the anode channel (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111346123.7A CN114243048A (en) | 2021-11-15 | 2021-11-15 | Fuel cell composite structure polar plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111346123.7A CN114243048A (en) | 2021-11-15 | 2021-11-15 | Fuel cell composite structure polar plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114243048A true CN114243048A (en) | 2022-03-25 |
Family
ID=80749518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111346123.7A Pending CN114243048A (en) | 2021-11-15 | 2021-11-15 | Fuel cell composite structure polar plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114243048A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070072051A1 (en) * | 2005-09-29 | 2007-03-29 | Yuusuke Sato | Fuel cell and fuel cell system |
| CN103151546A (en) * | 2013-03-25 | 2013-06-12 | 杭州电子科技大学 | Flow field plate of fuel cell and fuel cell |
-
2021
- 2021-11-15 CN CN202111346123.7A patent/CN114243048A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070072051A1 (en) * | 2005-09-29 | 2007-03-29 | Yuusuke Sato | Fuel cell and fuel cell system |
| CN103151546A (en) * | 2013-03-25 | 2013-06-12 | 杭州电子科技大学 | Flow field plate of fuel cell and fuel cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11784326B2 (en) | Fuel cell, bipolar plate and bipolar plate assembly for fuel cell | |
| US7718298B2 (en) | Bifurcation of flow channels in bipolar plate flowfields | |
| CN100367533C (en) | Cooling system for a fuel cell stack | |
| KR100657416B1 (en) | Gasketed membrane-electrode-assembly and fuel cell system employing the same | |
| EP1265303A1 (en) | Polymer electrolyte fuel cell and method of manufacturing the same | |
| US20090181269A1 (en) | Fuel cell stack, fuel cell system and method of operating fuel cell system | |
| US10637077B2 (en) | Frame equipped membrane electrode assembly and fuel cell | |
| CN214254475U (en) | Fuel cell and repeating component for fuel cell | |
| US8101322B2 (en) | Constant channel cross-section in a PEMFC outlet | |
| US20080254332A1 (en) | Fuel cell stack and manufacturing method of the same | |
| EP2887435A1 (en) | Membrane electrode assembly, production method therefor, and solid polymer fuel cell | |
| CN104205461B (en) | Avoid the fuel shortage of anode tap fuel cell | |
| US8227136B2 (en) | Using ionomer to militate against membrane buckling in the tenting region | |
| JP5183143B2 (en) | Fuel cell | |
| US8211591B2 (en) | Subgasket window edge design relief | |
| US20120015283A1 (en) | Composite gasket for fuel cell stack | |
| CN114243048A (en) | Fuel cell composite structure polar plate | |
| KR101315622B1 (en) | Fuelcell stack using branched channel | |
| US8137856B2 (en) | Fuel cell | |
| KR101238886B1 (en) | Fuel cell system and stack | |
| US20130078545A1 (en) | Fuel cell stack | |
| US20100316916A1 (en) | Polymer electrolyte fuel cell system | |
| CN111971833A (en) | Fuel cell plate and flow structure design | |
| US20100081025A1 (en) | Material design to enable high mid-temperature performance of a fuel cell with ultrathin electrodes | |
| US10727504B2 (en) | Method of operating fuel cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220824 Address after: Room 304, 3rd Floor, Building 1, Yard 15, Xinya Street, Daxing District, Beijing 100000 Applicant after: Zhongxing Huiye New Energy Technology (Beijing) Co.,Ltd. Address before: 550000 room 402, unit 1, building 17, Xinxinyuan community, Yunyan District, Guiyang City, Guizhou Province Applicant before: Li Yifei |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220325 |
|
| RJ01 | Rejection of invention patent application after publication |