CN204668396U - A kind of used in proton exchange membrane fuel cell gas flowfield - Google Patents
A kind of used in proton exchange membrane fuel cell gas flowfield Download PDFInfo
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- CN204668396U CN204668396U CN201520347144.4U CN201520347144U CN204668396U CN 204668396 U CN204668396 U CN 204668396U CN 201520347144 U CN201520347144 U CN 201520347144U CN 204668396 U CN204668396 U CN 204668396U
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- flow field
- field segments
- fuel cell
- channel section
- exchange membrane
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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 discloses a kind of used in proton exchange membrane fuel cell gas flowfield; It comprises the outlet of reaction gas entrance, rectangle channel section and reaction gas, the first distribution flow field segments is provided with between reaction gas entrance and rectangle channel section, the second distribution flow field segments is provided with between reaction gas outlet and rectangle channel section, first distributes flow field segments, second distributes flow field segments by parallel streamlined groove composition, and first distributes flow field segments, the second turning distributed between flow field segments and rectangle channel section is streamlined; First distributes flow field segments, second distributes flow field segments by parallel streamlined groove composition, and and turning between rectangle channel section be streamlined, make gas distributed uniform, not easily form turbulent flow, the pressure loss is less, is conducive to the discharge of water and tail gas, not only structure is simple for used in proton exchange membrane fuel cell gas flowfield of the present utility model, and gas distributed uniform, drainability is better, and pressure loss is little.
Description
Technical field
The utility model relates to field of fuel cell technology, particularly relates to a kind of used in proton exchange membrane fuel cell gas flowfield.
Background technology
Fuel cell is a kind of device by chemical reaction, the chemical energy of fuel and oxidant being converted into electric energy, start the outstanding advantages such as fast, energy conversion efficiency is high, environmental pollution is little, noise is low under there is room temperature, have broad application prospects in fields such as traffic, generating, military affairs, Aero-Space.
Proton Exchange Membrane Fuel Cells (Proton Exchange Membrane Fuel Cell, be called for short PEMFC) with perfluorosulfonic acid type solid polymer for electrolyte, platinum/carbon or platinum-ruthenium/carbon are eelctro-catalyst, hydrogen or purification reformed gas are fuel, air or pure oxygen are oxidant, are bipolar plates with the graphite cake of gas flow channel or the metallic plate of surface modification.
Flow field is the groove of the various shapes of processing in bipolar plates, for reactant and generation product provide access way, is the key factor of fuel cell design.Therefore, flow field reasonable in design both can fuel and oxidant needed for uniform distribution battery, guarantee uniform current density distributes, the water that battery can also be generated and tail gas are discharged smoothly, bipolar plates quality, thickness and quantity can also be reduced simultaneously, improve the quality of pemfc stack than power and gravimetric specific power, improve PEMFC stack performance.
Flow field patterns of the prior art mainly contains parallel groove, netted, snakelike etc.Mesh flow field structure is simple, and distribution of gas is even, but resistance drop is comparatively large, then there is larger etching problem according to metal material simultaneously; Rectangle channel uses maximum gas flowfields at present, and structure is simple, easily processes, and resistance drop is little, but gas distributes existing problems, particularly at higher current densities, gas distributes serious uneven, affects the gas transfer in cell reaction process and the eliminating generating water; Serpentine flow is longer due to flow field, there is the problem that reaction gas resistance is larger.
Utility model content
The purpose of this utility model is to provide a kind of used in proton exchange membrane fuel cell gas flowfield, and its structure is simple, and gas distributed uniform, drainability is better, and pressure loss is little.
For reaching this object, the utility model by the following technical solutions:
A kind of used in proton exchange membrane fuel cell gas flowfield, comprise the outlet of reaction gas entrance, rectangle channel section and reaction gas, the first distribution flow field segments is provided with between reaction gas entrance and rectangle channel section, the second distribution flow field segments is provided with between reaction gas outlet and rectangle channel section, first distributes flow field segments, second distributes flow field segments by parallel streamlined groove composition, and first distributes flow field segments, the second turning distributed between flow field segments and rectangle channel section is streamlined.
Wherein, the width of streamlined groove is 0.7 ~ 1.5mm.
Wherein, first distributes flow field segments, the second distribution flow field segments is centrosymmetric about rectangle channel section.
Wherein, first distributes flow field segments, the second area summation of distributing flow field segments is 5% ~ 12% of the gas flowfield gross area.
Wherein, rectangle channel section is made up of parallel straight type groove, and the width of straight type groove is 0.7 ~ 1.5mm.
Wherein, the material of gas flowfield is pure graphite material, expanded graphite meterial or conductive metallic material.
Wherein, the processing mode of gas flowfield is Carving Machining, punching press or mold pressing processing.
The beneficial effects of the utility model: a kind of used in proton exchange membrane fuel cell gas flowfield, comprise the outlet of reaction gas entrance, rectangle channel section and reaction gas, the first distribution flow field segments is provided with between reaction gas entrance and rectangle channel section, the second distribution flow field segments is provided with between reaction gas outlet and rectangle channel section, first distributes flow field segments, second distributes flow field segments by parallel streamlined groove composition, and first distributes flow field segments, the second turning distributed between flow field segments and rectangle channel section is streamlined.First distributes flow field segments, second distributes flow field segments by parallel streamlined groove composition, first distributes flow field segments, the second turning distributed between flow field segments and rectangle channel section is streamlined, make gas distributed uniform, not easily form turbulent flow, the pressure loss is less, is conducive to the discharge of water and tail gas, not only structure is simple for used in proton exchange membrane fuel cell gas flowfield of the present utility model, and gas distributed uniform, drainability is better, and pressure loss is little.
Accompanying drawing explanation
Fig. 1 is the structural representation of used in proton exchange membrane fuel cell gas flowfield of the present utility model.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Fig. 3 is the polarization curve comparison diagram of battery that the battery of used in proton exchange membrane fuel cell gas flowfield of the present utility model assembling and common parallel groove gas flowfield are assembled.
Reference numeral is as follows:
1-reaction gas entrance; 2-rectangle channel section; 3-reaction gas exports; 4-first distributes flow field segments; 5-second distributes flow field segments
Embodiment
The technical solution of the utility model is further illustrated by specific embodiment below in conjunction with Fig. 1 to Fig. 3.
A kind of used in proton exchange membrane fuel cell gas flowfield, comprise reaction gas entrance 1, rectangle channel section 2 and reaction gas outlet 3, the first distribution flow field segments 4 is provided with between reaction gas entrance 1 and rectangle channel section 2, the second distribution flow field segments 5 is provided with between reaction gas outlet 3 and rectangle channel section 2, first distributes flow field segments 4, second distributes flow field segments 5 by parallel streamlined groove composition, first turning distributed between flow field segments 4, second distribution flow field segments 5 and rectangle channel section 2 is streamlined, as depicted in figs. 1 and 2.First distributes flow field segments 4, second distributes flow field segments 5 by parallel streamlined groove composition, first turning distributed between flow field segments 4, second distribution flow field segments 5 and rectangle channel section 2 is streamlined, make gas distributed uniform, not easily form turbulent flow, the pressure loss is less, is conducive to the discharge of water and tail gas, not only structure is simple for used in proton exchange membrane fuel cell gas flowfield of the present utility model, and gas distributed uniform, drainability is better, and pressure loss is little.
In the utility model, first distributes flow field segments 4, second distribution flow field segments 5 is centrosymmetric about rectangle channel section 2, and the first area summation of distributing flow field segments 4, second distribution flow field segments 5 is 5% ~ 12% of the gas flowfield gross area, the width of streamlined groove is 0.7 ~ 1.5mm, rectangle channel section 2 is made up of parallel straight type groove, and the width of straight type groove is 0.7 ~ 1.5mm.
In the present embodiment, the first area summation of distributing flow field segments 4, second distribution flow field segments 5 accounts for the percentage of the gas flowfield gross area: hydrogen side is 11%, and empty side is 6%; The width of streamlined groove: hydrogen side is 0.8mm, empty side is 1.0mm; The width of straight type groove: hydrogen side is 0.8mm, empty side is 1.0mm, and namely the width of streamlined groove is equal with the width of straight type groove.In other embodiments, first distributes flow field segments 4, second and distributes arbitrary numerical value that percentage that the area summation of flow field segments 5 accounts for the gas flowfield gross area can select in 5% to 12%; The width of streamlined groove can select the arbitrary numerical value in 0.7mm to 1.5mm; The width of straight type groove can select the arbitrary numerical value in 0.7mm to 1.5mm.
In the present embodiment, distribute flow field segments 4, second from first and distribute the transition of flow field segments 5 to rectangle channel section 2: hydrogen side adopts " one point four " structure, and empty side adopts " one point three " structure, in other embodiments, also can select other structures as required.
In the present embodiment, the material of gas flowfield is pure graphite material, the processing mode of gas flowfield is Carving Machining, in other embodiments, the material of gas flowfield also can select expanded graphite meterial or conductive metallic material as required, and the processing mode of gas flowfield also can select punching press or mold pressing processing as required.
Used in proton exchange membrane fuel cell gas flowfield of the present utility model is adopted to assemble one 20 joint fuel cell pack, after tested, Performance data is good, when current density is greater than 900mA/cm2, performance apparently higher than the performance of common parallel groove gas flowfield pile, as shown in Figure 2.This illustrates and adopts the Performance data of used in proton exchange membrane fuel cell gas flowfield of the present utility model significantly better than common parallel groove gas flowfield pile, and especially under high electric density condition, Performance data promotes particularly evident.
Compared with prior art, the utility model has the advantage of:
A. the width of streamlined groove and the width of straight type groove and resistance is suitable, can be distributed to electrode surface equably after reacting gas flows to reaction gas entrance 1, even under high electric density, the distribution of gas is also comparatively even;
B. reacting gas is when first distributes flow field segments 4, and reacting gas distributes flow field segments 4 first and not easily forms turbulent flow, and the pressure loss is less;
C., when reacting gas enters middle rectangle channel section 2 by the first distribution flow field segments 4, the non-perpendicular turning through fairshaped turning, makes the pressure loss of gas less like this;
D. when reacting gas enters the second distribution flow field segments 5 by the rectangle channel section 2 of centre, the non-perpendicular turning through fairshaped turning, such one side reduces pressure loss, be conducive to the discharge of water and tail gas on the other hand, efficiently solve battery outlet port by the problem of water logging, improve the stability of battery operation;
E. improve the output performance of battery under fuel cell output performance, particularly high electric density, the volumetric specific power and the quality that improve battery compare power;
F. applied widely, fuel, oxidant and cooling fluid flow field can be taken into account simultaneously, and be specially adapted to the large area bipolar plates of vehicle fuel battery;
G. structure is simple, reduces process complexity and battery manufacture cost.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (7)
1. a used in proton exchange membrane fuel cell gas flowfield, comprise reaction gas entrance (1), rectangle channel section (2) and reaction gas outlet (3), it is characterized in that, the first distribution flow field segments (4) is provided with between described reaction gas entrance (1) and described rectangle channel section (2), the second distribution flow field segments (5) is provided with between described reaction gas outlet (3) and described rectangle channel section (2), described first distributes flow field segments (4), described second distributes flow field segments (5) by parallel streamlined groove composition, described first distributes flow field segments (4), described second turning distributed between flow field segments (5) and described rectangle channel section (2) is streamlined.
2. used in proton exchange membrane fuel cell gas flowfield according to claim 1, is characterized in that, the width of described streamlined groove is 0.7 ~ 1.5mm.
3. used in proton exchange membrane fuel cell gas flowfield according to claim 1, it is characterized in that, described first distributes flow field segments (4), described second distribution flow field segments (5) is centrosymmetric about described rectangle channel section (2).
4. used in proton exchange membrane fuel cell gas flowfield according to claim 1, it is characterized in that, described first distributes flow field segments (4), the described second area summation of distributing flow field segments (5) is 5% ~ 12% of the gas flowfield gross area.
5. used in proton exchange membrane fuel cell gas flowfield according to claim 1, is characterized in that, described rectangle channel section (2) is made up of parallel straight type groove, and the width of described straight type groove is 0.7 ~ 1.5mm.
6. used in proton exchange membrane fuel cell gas flowfield according to claim 1, is characterized in that, the material of described gas flowfield is pure graphite material, expanded graphite meterial or conductive metallic material.
7. used in proton exchange membrane fuel cell gas flowfield according to claim 1, is characterized in that, the processing mode of described gas flowfield is Carving Machining, punching press or mold pressing processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520347144.4U CN204668396U (en) | 2015-05-26 | 2015-05-26 | A kind of used in proton exchange membrane fuel cell gas flowfield |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520347144.4U CN204668396U (en) | 2015-05-26 | 2015-05-26 | A kind of used in proton exchange membrane fuel cell gas flowfield |
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| CN204668396U true CN204668396U (en) | 2015-09-23 |
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Cited By (1)
| 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 |
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2015
- 2015-05-26 CN CN201520347144.4U patent/CN204668396U/en not_active Expired - Fee Related
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 |
| 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 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20180526 |