CN201845827U - Gas flowfield for proton exchange membrane fuel battery - Google Patents
Gas flowfield for proton exchange membrane fuel battery Download PDFInfo
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- CN201845827U CN201845827U CN2010205946407U CN201020594640U CN201845827U CN 201845827 U CN201845827 U CN 201845827U CN 2010205946407 U CN2010205946407 U CN 2010205946407U CN 201020594640 U CN201020594640 U CN 201020594640U CN 201845827 U CN201845827 U CN 201845827U
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- flow field
- flowfield
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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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Abstract
The utility model relates to a gas flowfield for a proton exchange membrane fuel battery, which comprises a parallel groove flowfield segment, distributing flowfield segments, a reaction gas inlet and a reaction gas outlet. The parallel groove flowfield segment is arranged in the middle, and the distributing flowfield segments are arranged at the two ends. The distributing flowfield segments at the two ends are communicated with the parallel groove flowfield segment in the middle. The reaction gas inlet and the reaction gas outlet are respectively communicated with the distributing flowfield segments at the two ends. The base planes of the distributing flowfield segments are provided with uniformly distributed ellipse distributing headers which are ellipse columns raised on the base planes. Compared with the prior art, the utility model has the advantages that when gas passes through the distributing flowfield segments which are provided with the ellipse distributing headers, the gas is easy to form turbulent flow at the distributing headers; the gas is redistributed so that the gas is uniformly distributed on the surface of an electrode; and the gas flowfield ameliorates the mass transfer of the gas, improves the output performance of the fuel battery, simultaneously improves the distribution of the water produced at the battery outlet, solves the problem that the battery outlet is submerged by the water, and improves the running stability of the battery.
Description
Technical field
The utility model relates to the fuel cell technology field, relates in particular to the used in proton exchange membrane fuel cell gas flowfield.
Background technology
Proton exchange model fuel cell (PEMFC) is an electrolyte with perfluorinated sulfonic acid type solid polymer, platinum/carbon is eelctro-catalyst, hydrogen or purification reformation gas are fuel, and air or pure oxygen are oxidant, and having the graphite of gas flow channel or the metallic plate of surface modification is bipolar plates.
Flow field on the bipolar plates plays a part gas to be distributed, and the mobile direction of guiding reaction gas is assigned to each place of electrode with guaranteeing the reacting gas uniformity, participates in electrochemical reaction.The flow field of prior art mainly contains parallel groove, flow field such as netted, snakelike.All there are pluses and minuses separately in various flow fields, and are simple in structure as mesh flow field, and distribution of gas is even, but the resistance drop increasing, there is bigger etching problem in the general simultaneously metal material that adopts; The parallel groove flow field is to use maximum gas flowfields at present, and is simple in structure, processing easily, and resistance drop is little, but gas distributes existing problems, particularly under the high electric density, gas distributes serious uneven, influences gas transfer and the eliminating that generates water in the cell reaction process.There is the big problem of reaction gas resistance in serpentine flow because the flow field is longer.
Summary of the invention
The utility model purpose is to provide a kind of gas distributing uniformity, drainability Proton Exchange Membrane Fuel Cells gas smoothness preferably.
To achieve these goals, the technical scheme that the utility model is taked is: a kind of used in proton exchange membrane fuel cell gas flowfield, comprise the parallel groove flow field segments, distribute flow field segments, reaction gas inlet and reaction gas outlet, the centre is the parallel groove flow field segments, two ends are for distributing flow field segments, the distribution flow field segments at two ends is connected with middle parallel groove flow field segments, reaction gas is gone into, outlet is communicated with the distribution flow field segments at two ends respectively, the baseplane that it is characterized in that described distribution flow field segments is provided with equally distributed oval dispensing head, spacing 0.3-0.9mm between the adjacent oval dispensing head; Described oval dispensing head is the elliptical cylinder of projection on the baseplane of distributing flow field segments, and the elliptical cylinder height is consistent with middle flow field height, and the length of elliptical cylinder is 2-5mm, and the width of elliptical cylinder is 0.5-1.2mm.
A kind of used in proton exchange membrane fuel cell gas flowfield described in the utility model, the area summation that it is characterized in that the distribution flow field segments that is provided with oval dispensing head at described two ends is the 5-15% of the gas flowfield gross area, and the area of the distribution flow field segments that is provided with oval dispensing head at two ends is identical.
A kind of used in proton exchange membrane fuel cell gas flowfield described in the utility model is characterized in that the length that described two ends are provided with the distribution flow field segments of oval dispensing head is 15-30mm, and the length of middle parallel groove flow field segments is 300-350mm.
Compared with prior art, advantage of the present utility model is:
When 1) the reacting gas process was provided with the distribution flow field segments of oval dispensing head, gas was easy to form turbulent flow at the dispensing head position, and gas is reallocated, and can make gas be distributed to the surface of electrode equably, changes the mass transfer that holds reacting gas;
2) improve the fuel cell output performance; Improve the distribution that battery outlet port generates water simultaneously, reduced battery outlet port, improve the stability of battery operation by the problem of water logging.
Description of drawings
The utility model has 3 accompanying drawings, wherein;
Fig. 1 is the flow field structure schematic diagram with oval dispensing head,
Fig. 2 is the flow field partial structurtes schematic diagram with oval dispensing head,
Fig. 3 is the pile performance curve that adopts pile and the common parallel groove flow field of the flow field assembling of the oval dispensing head of band of the present utility model to assemble.
In the accompanying drawing, 1, the distribution flow field segments of the oval dispensing head of reaction gas port of export band, 2, middle parallel groove flow field segments, 3, the distribution flow field segments of the oval dispensing head of reaction gas arrival end band.
Among Fig. 3, being the battery performance of rectangle channel with the curve of round dot, is the battery performance in the oval dispensing head of band of the present utility model flow field with the curve of Diamond spot.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Flow field shown in Figure 1, distribution flow field segments 3 length that are provided with oval dispensing head of arrival end are 25mm, distribution flow field segments 1 length that is provided with oval dispensing head of the port of export is 25mm, and parallel groove flow field segments length is 300mm, and semicircular structure is adopted in the flow-field channel bottom.The flow field material can be pure graphite material, expanded graphite ability material or conductive metallic material, and the flow field processing mode can be Carving Machining, also can be punching press or mold pressing processing.Oval dispensing head length is 5mm, and width: the hydrogen side is 0.8mm, and the oxygen side is 0.6mm, spacing between the oval dispensing head: the oxygen side is 0.6mm, and the oxygen side is 0.8mm, and the dispensing head height is consistent with middle flow field height.
Adopt the utility model to send out one 120 joint of the flow field assembling fuel cell pile of technology processing, after tested, pile is functional, and 800mA/cm2 pile average behavior reaches 0.66V, apparently higher than conventional flow field pile performance as shown in Figure 3.Adopt the utility model flow field pile performance significantly better than conventional parallel groove flow field pile, especially under the high electric density condition, the pile performance boost is particularly evident.
Claims (3)
1. used in proton exchange membrane fuel cell gas flowfield, comprise parallel groove flow field segments, distribution flow field segments, reaction gas inlet and reaction gas outlet, the centre is the parallel groove flow field segments, two ends are for distributing flow field segments, the distribution flow field segments at two ends is connected with middle parallel groove flow field segments, reaction gas is gone into, is exported respectively and is communicated with the distribution flow field segments at two ends, the baseplane that it is characterized in that described distribution flow field segments is provided with equally distributed oval dispensing head, spacing 0.3-0.9mm between the adjacent oval dispensing head; Described oval dispensing head is the elliptical cylinder of projection on the baseplane of distributing flow field segments, and the elliptical cylinder height is consistent with middle flow field height, and the length of elliptical cylinder is 2-5mm, and the width of elliptical cylinder is 0.5-1.2mm.
2. according to the described a kind of used in proton exchange membrane fuel cell gas flowfield of claim 1, the area summation that it is characterized in that the distribution flow field segments that is provided with oval dispensing head at described two ends is the 5-15% of the gas flowfield gross area, and the area of the distribution flow field segments that is provided with oval dispensing head at two ends is identical.
3. according to the described a kind of used in proton exchange membrane fuel cell gas flowfield of claim 2, it is characterized in that the length that described two ends are provided with the distribution flow field segments of oval dispensing head is 15-30mm, the length of middle parallel groove flow field segments is 300-350mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205946407U CN201845827U (en) | 2010-11-05 | 2010-11-05 | Gas flowfield for proton exchange membrane fuel battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205946407U CN201845827U (en) | 2010-11-05 | 2010-11-05 | Gas flowfield for proton exchange membrane fuel battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201845827U true CN201845827U (en) | 2011-05-25 |
Family
ID=44040709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205946407U Expired - Lifetime CN201845827U (en) | 2010-11-05 | 2010-11-05 | Gas flowfield for proton exchange membrane fuel battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201845827U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868142A (en) * | 2015-05-26 | 2015-08-26 | 昆山弗尔赛能源有限公司 | Gas flow field for proton exchange membrane fuel cell |
| CN108470922A (en) * | 2018-03-02 | 2018-08-31 | 广东国鸿氢能科技有限公司 | A kind of fuel battery double plates dispensing head |
-
2010
- 2010-11-05 CN CN2010205946407U patent/CN201845827U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868142A (en) * | 2015-05-26 | 2015-08-26 | 昆山弗尔赛能源有限公司 | Gas flow field for proton exchange membrane fuel cell |
| CN104868142B (en) * | 2015-05-26 | 2017-08-01 | 苏州弗尔赛能源科技股份有限公司 | A kind of used in proton exchange membrane fuel cell gas flowfield |
| CN108470922A (en) * | 2018-03-02 | 2018-08-31 | 广东国鸿氢能科技有限公司 | A kind of fuel battery double plates dispensing head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110525 |
|
| CX01 | Expiry of patent term |