CN208908238U - A kind of fuel battery double plates - Google Patents
A kind of fuel battery double plates Download PDFInfo
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- CN208908238U CN208908238U CN201821850169.6U CN201821850169U CN208908238U CN 208908238 U CN208908238 U CN 208908238U CN 201821850169 U CN201821850169 U CN 201821850169U CN 208908238 U CN208908238 U CN 208908238U
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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 kind of fuel battery double plates, belong to Proton Exchange Membrane Fuel Cells technical field.Gas flow is respectively equipped on the two sides of bipolar plates；The structure of the gas flow includes: inlet flow field section, distributed amongst flow field segments and the exit flow field section successively arranged along gas flow direction, and fluid inlet is equipped in inlet flow field section, and fluid outlet is equipped in exit flow field section；More carinate items are equipped in the structure of the inlet flow field section and exit flow field section, carinate item constitutes runner between each other, and the height of carinate item is less than the height of inlet flow field section and exit flow field section, has been sequentially distributed columnar projections on carinate item；The poroid ditch of hollow pillar is distributed in the distributed amongst flow field segments.Advantage: fluid is evenly distributed, and current density is evenly distributed；Drainability is preferable, is not susceptible to water logging, and Performance data is stablized；Pressure drop is moderate, is conducive to reduce the distribution of power loss and fluid between monocell.
Description
Technical field
The utility model relates to a kind of fuel battery double plates, belong to Proton Exchange Membrane Fuel Cells technical field.
Background technique
Proton Exchange Membrane Fuel Cells (proton exchange membrane fuel cell, PEMFC) is a kind of logical
The device that the chemical energy of fuel and oxidant is converted into electric energy by chemical reaction is crossed, has and starts fast, energy turn at room temperature
Outstanding advantages of high-efficient, environmental pollution is small, low noise is changed, is had extensively in fields such as traffic, power generation, military affairs, aerospaces
Wealthy application prospect.
Bipolar plates are one of critical components of PEMFC, according to Direct Technologies company investigation statistics, bipolar plates
Account for about the 29% of the 80% of pile volume, the 70% of quality and cost.Its function be support membrane electrode assembly, distribution reaction gas and
Coolant liquid, collected current, conduction heat and discharge product water etc..
Flow field is the groove of various shapes processed in bipolar plates, is mentioned for reaction gas and coolant liquid and the product of generation
It is the key factor of fuel cell design for access way.Therefore, designing reasonable flow field can both evenly distribute needed for battery
Fuel, oxidant and coolant liquid (fuel, oxidant and coolant liquid are hereafter referred to collectively as " fluid "), guarantee uniform current density point
Match, the water and tail gas that battery generates can also be smoothly discharged, meanwhile, under certain flow, pressure that fluid passes through flow field
Drop that moderate (pressure drop will cause greatly very much excessively high power loss, and the too small fluid that is unfavorable for of pressure drop is in multiple monocells in parallel
Between distribute).In addition, reasonable flow Field Design can also reduce bipolar plates quality, thickness and quantity, the matter of pemfc stack is improved
Specific power and volumetric specific power are measured, PEMFC stack performance is improved.
Currently, the flow field of fuel cell is broadly divided into three categories: one, traditional flow field, the i.e. flow fields such as parallel groove, snakelike；
Two, foamed metal flow fields；Three, 3D fine grid blocks flow field.It for traditional flow field, is made of ridge and runner, in order to reduce film electricity
Contact resistance between pole component (MEA) and bipolar plates, the gas diffusion layers (GDL) that ridge has partially been pressed into MEA surface are internal,
Ridge covers part GDL in this way, and gas transport distance is caused to be greater than the distance between runner, and therefore, the width of general ridge is bigger, electricity
The polarization performance in pond is poorer.Meanwhile the pressure between GDL and ridge causes the thickness distribution of GDL uneven, contacts in GDL with ridge
Segment thickness it is relatively thin, the saturation degree of water is higher, and water is easy to condense here, influences the transmission of gas, leads to current density point
Cloth is uneven, influences pile output power and service life.For foamed metal flow fields, since flow field and GDL contact width are sufficiently small,
Gas transport is not hindered, the water of generation is adsorbed by hydrophilic metal foam, therefore gas transport is relatively uniform, current density point
Cloth is also uniform, and higher output power can be obtained.But foamed metal flow fields generate higher pressure drop, while being easy to retain
Generate water.Although 3D fine grid blocks flow field can solve gas existing for traditional flow field and foamed metal flow fields and be distributed in water distribution
Uneven problem, but its structure is complicated, difficulty of processing is larger, and manufacturing cost is higher.
Utility model content
The utility model proposes a kind of fluid it is evenly distributed, drainability is preferable, pressure drop is moderate, structure is simply fired
Expect cell flow-field.
A kind of fuel battery double plates are respectively equipped with gas flow on the two sides of bipolar plates；
The structure of the gas flow includes: the inlet flow field section successively arranged along gas flow direction, intermediate point
With flow field segments and exit flow field section, it is equipped with fluid inlet in inlet flow field section, fluid outlet is equipped in exit flow field section；
More carinate items are equipped in the structure of the inlet flow field section and exit flow field section, carinate item is constituted between each other
Runner, and the height of carinate item is less than the height of inlet flow field section and exit flow field section, has been sequentially distributed column on carinate item
Shape protrusion；
The poroid ditch of hollow pillar is distributed in the distributed amongst flow field segments.
In one embodiment, the width of runner is 0.2-1.5mm.
In one embodiment, carinate width is 0.2-1.5mm, is highly 0.05-0.8mm.
In one embodiment, the sectional area of the cross section of columnar projections is 0.03-2.0mm2；Columnar projections cross section
Shape be round, ellipse or polygon.
In one embodiment, the kernel of section of adjacent columnar projections is away from for 0.8-4.0mm.
In one embodiment, the shape of the cross section of the poroid ditch of hollow pillar is round, oval or polygon,
The sectional area of cross section is 0.09-2.25mm2。
In one embodiment, the kernel of section of the poroid ditch of adjacent hollow pillar is away from for 0.8-4.0mm.
In one embodiment, the material of the bipolar plates is graphite, metal or composite material.
In one embodiment, the bipolar plates with a thickness of 0.1-1.0mm, porosity 65%-95%, aperture is
100-900μm。
In one embodiment, centered on the inlet flow field section and exit flow field section are relative to the center of bipolar plates
Symmetrically, and inlet flow field section and exit flow field section area summation be the bipolar plates gross area 5%-15%.
In one embodiment, the hollow interior of the poroid ditch of hollow pillar is equipped with heater strip.
Beneficial effect
The utility model has the beneficial effects that (a) fluid is evenly distributed, current density is evenly distributed；(b) drainability compared with
It is good, it is not susceptible to water logging, Performance data is stablized；(c) pressure drop is moderate, is conducive to reduce power loss and fluid in single electricity
Distribution between pond；(d) structure is simple, easy to process.
Detailed description of the invention
Fig. 1 is the top view of bipolar plates provided by the utility model；
Fig. 2 is the perspective view of bipolar plates provided by the utility model；
Fig. 3 is the perspective view of outlet/inlet flow field segments；
Fig. 4 is the bipolar plate structure top view in reference examples 1；
Fig. 5 is the bipolar plate structure top view in reference examples 2；
Fig. 6 is the sectional view of the part of the poroid ditch of band provided by the utility model.
Wherein, 1, gas flow；2, fluid inlet；3, fluid outlet；4, inlet flow field section；5, distributed amongst flow field segments；
6, exit flow field section；7, poroid ditch；8, carinate item；9, runner；10, columnar projections；11, heater strip.
Specific embodiment
Embodiment 1
The bipolar plates material of the structure of bipolar plates provided by the utility model, use is as follows: nickel foam, with a thickness of 0.5mm,
Porosity is 75%, and aperture is 650 μm.
As shown in Figure 1, being respectively equipped with gas flow 1 on the two sides of bipolar plates when vertical view；The knot of the gas flow 1
Structure includes: inlet flow field section 4, distributed amongst flow field segments 5 and the exit flow field section 6 successively arranged along gas flow direction,
Inlet flow field section 4 is equipped with fluid inlet 2, and fluid outlet 3 is equipped in exit flow field section 6.Inlet flow field section 4 and exit flow field
Section 6 is relative to symmetrical centered on the center of bipolar plates, and inlet flow field section 4 and 6 area summation of exit flow field section are that bipolar plates are total
The 8% of area.
As shown in Figures 2 and 3, more carinate items 8 are equipped in the structure of the inlet flow field section 4 and exit flow field section 6,
Carinate item 8 constitutes runner 9 between each other, and 9 width of runner is 1.4mm, and it is highly 0.1mm, in ridge that carinate 8 width of item, which is 1.0mm,
Columnar projections 10 have been sequentially distributed on shape item 8；The shape of 10 cross section of columnar projections is ellipse, and sectional area is 0.6 mm2。
The poroid ditch 7 of hollow pillar is distributed in distributed amongst flow field segments 5.The effect of poroid ditch 7 is distributed amongst stream
Section institute centre sets up the obstruction column of dense distribution, promotes the distribution of gas；Here the cross of the poroid ditch 7 of hollow pillar
The shape in section is circle, sectional area 1.4mm2.The center of adjacent poroid ditch 7 is away from for 2.0mm.
Embodiment 2
The bipolar plates material of the structure of bipolar plates provided by the utility model, use is as follows: nickel foam, with a thickness of 0.5mm,
Porosity is 75%, and aperture is 650 μm.
As shown in Figure 1, being respectively equipped with gas flow 1 on the two sides of bipolar plates when vertical view；The knot of the gas flow 1
Structure includes: inlet flow field section 4, distributed amongst flow field segments 5 and the exit flow field section 6 successively arranged along gas flow direction,
Inlet flow field section 4 is equipped with fluid inlet 2, and fluid outlet 3 is equipped in exit flow field section 6.Inlet flow field section 4 and exit flow field
Section 6 is relative to symmetrical centered on the center of bipolar plates, and inlet flow field section 4 and 6 area summation of exit flow field section are that bipolar plates are total
The 8% of area.
As shown in Figures 2 and 3, more carinate items 8 are equipped in the structure of the inlet flow field section 4 and exit flow field section 6,
Carinate item 8 constitutes runner 9 between each other, and 9 width of runner is 1.4mm, and it is highly 0.1mm, in ridge that carinate 8 width of item, which is 1.0mm,
Columnar projections 10 have been sequentially distributed on shape item 8；The shape of 10 cross section of columnar projections is ellipse, and sectional area is 0.6 mm2。
The poroid ditch 7 of hollow pillar is distributed in distributed amongst flow field segments 5.The effect of poroid ditch 7 is distributed amongst stream
Section institute centre sets up the obstruction column of dense distribution, promotes the distribution of gas；Here the cross of the poroid ditch 7 of hollow pillar
The shape in section is circle, sectional area 1.4mm2.The center of adjacent poroid ditch 7 is away from for 2.0mm；It is built-in in poroid ditch 7
There is heater strip 11, heater strip 11 here can connect between each other or parallel connection, and main purpose is to make the temperature of poroid ditch 7
Degree is improved, and heater strip 11 can make the outer of poroid ditch 7 by heating using materials such as conventional resistance wires, when in use
Surface temperature is 5 DEG C higher than the gas temperature for entering distributed amongst flow field segments 5.
Reference examples 1
As shown in figure 4, being with the difference of embodiment 1: the entire flow field of bipolar plates uses and inlet flow field section 4 and exit flow field
6 identical runners of section.
Reference examples 2
As shown in figure 5, being with the difference of embodiment 1: the entire flow field of bipolar plates is using identical with distributed amongst flow field segments 5
Runner.
Reference examples 3
Difference with embodiment 1 is: not set columnar projections 10 in inlet flow field section 4 and exit flow field section 6.
Test condition
Hydrogen distribution simulation is carried out to calculate；Meanwhile using MEA and different types of bipolar plates, it is prepared into 2000W pile；
0 .3 of hydrogen gas pressure~.05MPa；Test voltage 83A continuous work 8 hours, carries out water logging and presses to wear test in 24V.
Test result is as follows:
From test result as can be seen that operational process hydrogen can be effectively improved using bipolar plate structure of the invention
Distribution, has the advantages that RSD is small；By the comparison of embodiment 1 and embodiment 2 as can be seen that the inside to poroid ditch 7 carries out electricity
After hindering silk heating, the utilization rate of hydrogen can be effectively improved and improve the distribution of hydrogen；Pass through embodiment 1 and reference examples
1,2 comparison can be seen that the flow field using three-stage, so that whole hydrogen utilization ratio is improved, and keep away
The problem of exempting from water logging and pressing to wear；It can see by the comparison of embodiment 1 and reference examples 3, columnar projections 10 are in inlet flow field section 4
Key effect is played in exit flow field section 6, the utilization rate of hydrogen can be effectively improved and improves the distribution of hydrogen.
As can be seen that current density is divided compared with the prior art, the advantages of the utility model are: fluid is evenly distributed
Cloth is uniform；Drainability is preferable, is not susceptible to water logging, and Performance data is stablized；Pressure drop is moderate, be conducive to reduce power loss with
And distribution of the fluid between monocell；Structure is simple, easy to process.
Claims (10)
1. a kind of fuel battery double plates, which is characterized in that be respectively equipped with gas flow (1) on the two sides of bipolar plates；
The structure of the gas flow (1) includes: the inlet flow field section (4) successively arranged along gas flow direction, intermediate
Flow field segments (5) and exit flow field section (6) are distributed, fluid inlet (2) are equipped on inlet flow field section (4), in exit flow field section (6)
It is equipped with fluid outlet (3)；
More carinate items (8) are equipped in the structure of the inlet flow field section (4) and exit flow field section (6), carinate item (8) is mutual
Between constitute runner (9), and the height of carinate item (8) be less than inlet flow field section (4) and exit flow field section (6) height,
Columnar projections (10) have been sequentially distributed on carinate item (8)；
The poroid ditch (7) of hollow pillar is distributed in the distributed amongst flow field segments (5).
2. fuel battery double plates according to claim 1, which is characterized in that the width of runner (9) is 0.2-1.5mm.
3. fuel battery double plates according to claim 1, which is characterized in that carinate item (8) width is 0.2-1.5mm,
Height is 0.05-0.8mm.
4. fuel battery double plates according to claim 1, which is characterized in that the section of the cross section of columnar projections (10)
Product is 0.03-2.0mm2；The shape of columnar projections (10) cross section is round, ellipse or polygon.
5. fuel battery double plates according to claim 1, which is characterized in that in the section of adjacent columnar projections (10)
The heart is away from for 0.8-4.0mm.
6. fuel battery double plates according to claim 1, which is characterized in that the poroid ditch (7) of hollow pillar it is transversal
The shape in face is round, ellipse or polygon, and the sectional area of cross section is 0.09-2.25mm2。
7. fuel battery double plates according to claim 1, which is characterized in that the poroid ditch (7) of adjacent hollow pillar
Kernel of section away from for 0.8-4.0mm.
8. fuel battery double plates according to claim 1, which is characterized in that the material of the bipolar plates be graphite,
Metal or composite material；The bipolar plates with a thickness of 0.1-1.0mm, porosity 65%-95%, aperture is 100-900 μm.
9. fuel battery double plates according to claim 1, which is characterized in that the inlet flow field section (4) and outlet
Flow field segments (6) are relative to symmetrical centered on the center of bipolar plates, and inlet flow field section (4) and exit flow field section (6) area summation
For the 5%-15% of the bipolar plates gross area.
10. fuel battery double plates according to claim 1, which is characterized in that the poroid ditch (7) of hollow pillar it is hollow
Inside is equipped with heater strip (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821850169.6U CN208908238U (en) | 2018-11-12 | 2018-11-12 | A kind of fuel battery double plates |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821850169.6U CN208908238U (en) | 2018-11-12 | 2018-11-12 | A kind of fuel battery double plates |
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| CN208908238U true CN208908238U (en) | 2019-05-28 |
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| CN201821850169.6U Active CN208908238U (en) | 2018-11-12 | 2018-11-12 | A kind of fuel battery double plates |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492125A (en) * | 2019-07-26 | 2019-11-22 | 珠海格力电器股份有限公司 | A kind of hardened structure, double panel assemblies and the fuel cell with it |
| CN110993985A (en) * | 2019-12-14 | 2020-04-10 | 中国科学院大连化学物理研究所 | Flow channel structure of metal bipolar plate flow field of fuel cell |
| CN111106361A (en) * | 2019-12-23 | 2020-05-05 | 清华大学 | Fuel cell stack, bipolar plate and gas diffusion layer |
| CN111477906A (en) * | 2020-05-26 | 2020-07-31 | 上海交通大学 | Air-permeable bipolar plate suitable for fuel cell stack and fuel cell stack |
| CN111668508A (en) * | 2020-06-16 | 2020-09-15 | 氢源科技(赣州)有限公司 | Flow channel structure of bipolar plate of hydrogen fuel cell |
| CN113140746A (en) * | 2021-04-21 | 2021-07-20 | 大连海事大学 | Pisces bionic fuel cell bipolar plate |
| CN113793958A (en) * | 2021-08-24 | 2021-12-14 | 清华大学 | Fuel cell flooding diagnosis method based on current density distribution |
| CN114464835A (en) * | 2022-02-23 | 2022-05-10 | 一汽解放汽车有限公司 | Water drop-shaped bipolar plate and application thereof |
| CN114551921A (en) * | 2020-11-26 | 2022-05-27 | 中国科学院大连化学物理研究所 | High-temperature proton exchange membrane fuel cell flow field structure |
-
2018
- 2018-11-12 CN CN201821850169.6U patent/CN208908238U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492125A (en) * | 2019-07-26 | 2019-11-22 | 珠海格力电器股份有限公司 | A kind of hardened structure, double panel assemblies and the fuel cell with it |
| CN110993985A (en) * | 2019-12-14 | 2020-04-10 | 中国科学院大连化学物理研究所 | Flow channel structure of metal bipolar plate flow field of fuel cell |
| CN110993985B (en) * | 2019-12-14 | 2022-02-18 | 中国科学院大连化学物理研究所 | Flow channel structure of metal bipolar plate flow field of fuel cell |
| CN111106361A (en) * | 2019-12-23 | 2020-05-05 | 清华大学 | Fuel cell stack, bipolar plate and gas diffusion layer |
| CN111477906A (en) * | 2020-05-26 | 2020-07-31 | 上海交通大学 | Air-permeable bipolar plate suitable for fuel cell stack and fuel cell stack |
| CN111668508A (en) * | 2020-06-16 | 2020-09-15 | 氢源科技(赣州)有限公司 | Flow channel structure of bipolar plate of hydrogen fuel cell |
| CN114551921A (en) * | 2020-11-26 | 2022-05-27 | 中国科学院大连化学物理研究所 | High-temperature proton exchange membrane fuel cell flow field structure |
| CN114551921B (en) * | 2020-11-26 | 2024-04-02 | 中国科学院大连化学物理研究所 | Flow field structure of high-temperature proton exchange membrane fuel cell |
| CN113140746A (en) * | 2021-04-21 | 2021-07-20 | 大连海事大学 | Pisces bionic fuel cell bipolar plate |
| CN113793958A (en) * | 2021-08-24 | 2021-12-14 | 清华大学 | Fuel cell flooding diagnosis method based on current density distribution |
| CN113793958B (en) * | 2021-08-24 | 2023-04-18 | 清华大学 | Fuel cell water logging diagnosis method based on current density distribution |
| CN114464835A (en) * | 2022-02-23 | 2022-05-10 | 一汽解放汽车有限公司 | Water drop-shaped bipolar plate and application thereof |
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