CN116805697A - High volume ratio power bipolar plate flow field structure and fuel cell - Google Patents
High volume ratio power bipolar plate flow field structure and fuel cell Download PDFInfo
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- CN116805697A CN116805697A CN202310771549.XA CN202310771549A CN116805697A CN 116805697 A CN116805697 A CN 116805697A CN 202310771549 A CN202310771549 A CN 202310771549A CN 116805697 A CN116805697 A CN 116805697A
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- 239000000446 fuel Substances 0.000 title claims abstract description 15
- 239000000110 cooling liquid Substances 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 34
- 239000001257 hydrogen Substances 0.000 claims abstract description 29
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 29
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002826 coolant Substances 0.000 claims description 18
- 230000007423 decrease Effects 0.000 claims description 4
- 239000012809 cooling fluid Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 8
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000003570 air Substances 0.000 description 53
- 238000000034 method Methods 0.000 description 7
- 230000003068 static effect Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration 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
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Fuel Cell (AREA)
Abstract
The application relates to a high volume ratio power bipolar plate flow field structure and a fuel cell, wherein a bipolar plate comprises an anode plate and a cathode plate, a hydrogen flow field structure is arranged on a first side of the anode plate, an air flow field structure is arranged on a first side of the cathode plate, the anode plate and the cathode plate are mutually nested, a cooling liquid flow field structure is formed between a second side of the anode plate and a second side of the cathode plate, the hydrogen flow field structure comprises a plurality of hydrogen flow channels, the air flow field structure comprises a plurality of air flow channels, a normal section, a narrowing section and a widening section are arranged on the air flow channels, and the narrowing section of one flow channel is aligned with the widening section of the adjacent flow channel. Compared with the prior art, the application designs the nested bipolar plate, reduces the section thickness of the bipolar plate, thereby reducing the volume of the electric pile, and changes the gas pressure at the cathode flow field through changing the area of the flow passage of the cathode flow field, thereby increasing the pressure difference between two adjacent flow passages, promoting the gas to pass across the ridge for transmission, improving the reaction efficiency and the output power of the electric pile, and further improving the volume specific power of the electric pile.
Description
Technical Field
The application relates to the technical field of fuel cell stacks, in particular to a high-volume-ratio power bipolar plate flow field structure and a fuel cell.
Background
The proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC) is an electrochemical power generation device which takes hydrogen as fuel and takes oxygen or air as oxidant, and is widely applied to traffic, power generation, energy storage and other scenes at present. The power and volume requirements of the electric pile are different in different application scenes, and when the electric pile is applied to a passenger car, the electric pile is required to be high in power and small in volume, so that the electric pile has severe requirements on the performance and the overall volume ratio power.
The two side polar plates of the traditional bipolar plate are respectively different and are not directly related, the components of the bipolar plate are directly contacted through the cooling side plane, and the thickness of the unit section (the bipolar plate consisting of the cathode plate and the anode plate) is relatively large. When the power of the electric pile is increased, the integral volume of the electric pile is inevitably increased more, and the application scene of the electric pile is limited to a great extent. Therefore, the requirements of further optimizing the electrode plate structure and improving the performance of the electric pile are increasingly important under the premise of improving the overall performance of the electric pile.
In the prior art, chinese patent CN114039064A designs a bipolar plate of a proton exchange membrane fuel cell having a variable cross-section flow field channel, chinese patent CN115528267a designs a flow field plate, chinese patent CN113497242a designs a gas flow path for a fuel cell capable of minimizing the generation of the blocking of the gas flow path caused by the generated water, the increase of the pressure drop of the fuel cell caused by the buckling of the gas diffusion layer, and the like to obtain stable power generation performance, and the main design concept is to design a variable cross-section flow channel, and to change the pressure difference by changing the flow channel cross-section area to improve the drainage capacity of the cell and the performance. However, the above solution is not suitable for a nested structure of cathode and anode plates, the cathode plate is designed independently, the section thickness of the whole bipolar plate is not reduced, and the section thickness of the unit cannot be reduced to improve the volume ratio power.
Disclosure of Invention
The application aims to overcome the defects of the prior art and provide a high volume ratio power bipolar plate flow field structure and a fuel cell.
The aim of the application can be achieved by the following technical scheme:
according to a first aspect of the present application, there is provided a high volume ratio power bipolar plate flow field structure comprising an anode plate and a cathode plate, wherein a hydrogen flow field structure is arranged on a first side of the anode plate, an air flow field structure is arranged on a first side of the cathode plate, the anode plate and the cathode plate are mutually nested, a cooling liquid flow field structure is formed between a second side of the anode plate and a second side of the cathode plate, the hydrogen flow field structure comprises a plurality of hydrogen flow channels, the air flow field structure comprises a plurality of air flow channels, a normal section, a narrowing section and a widening section are arranged on the air flow channels, and the narrowing section of one flow channel is aligned with the widening section of an adjacent flow channel.
Further, the surface of the anode plate protrudes towards the first side and forms a plurality of anode gas side ridges, a hydrogen flow channel is formed between adjacent anode gas side ridges, and an anode cooling liquid side groove is formed on the second side of the anode plate by the anode gas side ridges;
the surface of the cathode plate protrudes towards the second side to form a plurality of cathode cooling liquid side ridges, the cathode cooling liquid side ridges form cathode air side grooves on the first side of the cathode plate, and the cathode air side grooves serve as air flow channels;
when the anode plate and the cathode plate are mutually nested, the plate surface of the anode plate is arranged between adjacent cathode cooling liquid side ridges, and the cathode cooling liquid side ridges are arranged in the anode cooling liquid side grooves.
Further, in the widened section of the air flow passage, the width of the cathode-gas-side groove increases, and in the narrowed section of the air flow passage, the width of the cathode-gas-side groove decreases.
Further, in the widened section of the air flow channel, the cathode coolant side ridge is attached to the side wall of the anode coolant side groove.
Further, a plurality of support bosses are arranged on the anode coolant side groove, and the support bosses are contacted with the cathode coolant side ridges of the cathode plate.
Further, the support boss is a convex structure from the anode gas side ridge of the anode plate to the second side.
Further, in the narrowed section of the air flow channel, the depth of the air flow channel is reduced, and the gap between the anode plate and the cathode plate is increased.
Further, the hydrogen flow channel and the air flow channel have the same flow channel form.
Further, the flow directions of the hydrogen and the air are parallel and reverse, and the flow direction of the cooling liquid is perpendicular to the flow direction of the gas.
According to a second aspect of the present application there is provided a fuel cell employing the high volumetric power bipolar plate flow field structure described above.
Compared with the prior art, the application has the following beneficial effects:
(1) The nested bipolar plate is designed, namely, the cathode and anode plates are mutually nested with the flow channels at the side ridges of the cooling liquid, so that the section thickness of the bipolar plate is effectively reduced, the volume of a galvanic pile is reduced, meanwhile, the cathode flow field is narrowed or widened at a certain position at a certain regular interval in the flow channel region, the narrowed parts of two adjacent flow channels are adjacent to the widened parts, the gas pressure of the parts is changed by changing the sectional area of the flow channels, the pressure difference between the two adjacent flow channels is increased, the gas is promoted to be transmitted across the ridges, the generated water accumulated by the reaction under the ridges is discharged, the reaction efficiency and the output power of the galvanic pile are improved, and the volume specific power of the galvanic pile is further improved.
(2) In order to meet the heat dissipation requirement of the galvanic pile and ensure the flow path of the cooling liquid, a supporting boss is designed below the ridge of the anode flow field to ensure the clearance between two polar plates and ensure the smooth flow of the cooling liquid.
(3) The bottom surface of the flow channel is raised at the narrowing position of the cathode flow channel, the depth-to-width ratio of the narrowing position is reduced, the processing and forming are facilitated, and meanwhile, the back surface is used as a flow path of cooling liquid, so that the smooth circulation of the cooling liquid is ensured.
Drawings
FIG. 1 is a flow field region block diagram of a bipolar plate according to the present application
Figure 2 is a side view of the anode plate of figure 1;
FIG. 3 is a schematic view of a cathode plate flow field in an embodiment of the application;
FIG. 4 is an enlarged schematic view of two adjacent air flow channels of a cathode plate in accordance with an embodiment of the application;
FIG. 5 is a schematic cross-sectional view at A-A of FIG. 3;
FIG. 6 is a schematic cross-sectional view at B-B in FIG. 3;
FIG. 7 is an enlarged view of a partial structure within the dashed box of FIG. 6;
FIG. 8 is a schematic cross-sectional view taken at C-C of FIG. 3;
fig. 9 is a schematic view of an anode plate flow field in accordance with an embodiment of the present application;
FIG. 10 is a schematic cross-sectional view taken at D-D of FIG. 9;
reference numerals: 1. the cathode plate, 2, the anode plate, 3, the normal section, 4, the widening section, 5, the narrowing section, 6, the first normal section position of the flow channel, 7, the first narrowing section position of the flow channel, 8, the second normal section position of the flow channel, 9, the second narrowing section position of the flow channel, 10, the cooling liquid circulation path, 11, the supporting boss, 1-1, the cathode cooling liquid side convex ridge, 1-2, the cathode gas side concave groove, 2-1, the anode gas side convex ridge, 2-2, the anode cooling liquid side concave groove, 2-3 and the hydrogen flow channel.
Detailed Description
The application will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical solution of the present application, and a detailed implementation manner and a specific operation process are given, and obviously, the described embodiment is only a part of the embodiment of the present application, but not all the embodiments, and the protection scope of the present application is not limited to the following embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the application. In the description of the present application, it should be understood that the terms "first," "second," and "third," etc. in the description and claims of the application and in the above figures are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The present specification provides method operational steps as an example or flow diagram, but may include more or fewer operational steps based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution. In actual system or server product execution, the steps may be performed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment) or in an order that is not timing-constrained, as per the methods shown in the embodiments or figures.
Example 1:
the application provides a high volume ratio power bipolar plate flow field structure, which comprises an anode plate 2 and a cathode plate 1, wherein a hydrogen flow field structure is arranged on a first side of the anode plate 2, an air flow field structure is arranged on a first side of the cathode plate 1, the anode plate 2 and the cathode plate 1 are mutually nested, a cooling liquid flow field structure is formed between a second side of the anode plate 2 and a second side of the cathode plate 1, the hydrogen flow field structure comprises a plurality of hydrogen flow channels 2-3, the air flow field structure comprises a plurality of air flow channels, a normal section 3, a narrowing section 5 and a widening section 4 are arranged on the air flow channels, and the narrowing section 5 of one flow channel is aligned with the widening section 4 of an adjacent flow channel.
As shown in fig. 1 and 2, the bipolar plate flow field is formed by nesting a cathode plate 1 and an anode plate 2, three fluid flow paths of hydrogen, air and cooling liquid are formed, the air flows in an air flow channel formed on the cathode plate 1, the hydrogen flows in a hydrogen flow channel 2-3 on the anode plate 2, and the cooling liquid flows between the two plates. The flow directions of the hydrogen and the air are parallel and reverse, and the flow direction of the cooling liquid is perpendicular to the flow direction of the gas.
The two pole plates are mutually nested, so the hydrogen-air integral flow field is approximately the same in form and is the same as a parallel straight runner or a parallel corrugated runner. However, the flow channels are different in form, the widths and depths of the flow channels at different positions in the air flow channel of the cathode plate 1 are changed according to a certain rule, the hydrogen flow channels 2-3 of the anode plate 2 are parallel flow channels without special structures, the air flow channel form of the cathode plate 1 is shown in figure 1, and the hydrogen flow channel form of the anode plate 2-3 is shown in figure 2.
Specifically, the surface of the anode plate 2 protrudes toward the first side and forms a plurality of anode gas side ridges 2-1, hydrogen flow channels 2-3 are formed between adjacent anode gas side ridges 2-1, and the anode gas side ridges 2-1 form anode coolant side grooves 2-2 on the second side of the anode plate 2; the surface of the cathode plate 1 protrudes towards the second side to form a plurality of cathode cooling liquid side ridges 1-1, the cathode cooling liquid side ridges 1-1 form cathode air side grooves 1-2 on the first side of the cathode plate 1, and the cathode air side grooves 1-2 serve as air flow channels; when the anode plate 2 and the cathode plate 1 are nested with each other, the plate surface of the anode plate 2 is arranged between the adjacent cathode cooling liquid side ridges 1-1, and the cathode cooling liquid side ridges 1-1 are arranged in the anode cooling liquid side grooves 2-2.
On the anode plate 2, the width and the height of the anode gas side ridge 2-1 are the same and are kept unchanged, and the formed hydrogen flow channel 2-3 is a parallel flow channel without a special structure. In the widened section 4 of the air flow channel, the width of the cathode gas side groove 1-2 increases, and in the narrowed section 5 of the air flow channel, the width of the cathode gas side groove 1-2 decreases. In view of the nesting relationship of the anode plate 2 and the cathode plate 1, it is necessary to ensure that the catholyte-side ridge 1-1 is also received within the anolyte-side groove 2-2 in the widened section 4 of the air flow path. In the embodiment of the application, the widening section 4 of the air flow channel is widened to the point that the cathode cooling liquid side ridge 1-1 is attached to the side wall of the anode cooling liquid side groove 2-2.
In the embodiment of the application, as shown in fig. 3, the flow field top view of the cathode plate 1 is that air flows in from one end of the air flow channel and flows out from the other end, and different positions in each air flow channel are narrowed or widened. Wherein the normal section 3, the widening section 4 and the narrowing section 5 are shown in fig. 3. For the convenience of processing and manufacturing, the lengths of the normal section 3, the widened section 4 and the narrowed section 5 are the same, the normal section 3, the widened section 4 and the narrowed section 5 are sequentially arranged in one air flow passage, and adjacent air flow passages are staggered, so that one of the two adjacent air flow passages is narrowed and the other air flow passage is widened at the same position, or the two adjacent air flow passages are both the normal section 3 at the same position. It should be noted that the narrowing and widening structure illustrated in the present application is only a simplified manner of showing the principle, and the form is not limited to this structure, but needs to function to reduce or increase the cross-sectional area, and at the same time, the turbulence needs to be reduced by avoiding the right angle transition in practical design, in fact, the widening widths of the widening sections 4 at different positions of the same air flow path may be different (but need to be wider than the normal section 3), and the narrowing widths of the narrowing sections 5 at different positions may be different (but need to be narrower than the normal section 3).
Adjacent air flow channels are parallel, as shown in fig. 4, and when the flow channel section changes, the kinetic energy changes and thus the static pressure changes when the flow channel flows. The flow passage is narrowed, the flow passage section is reduced, the flow speed is increased, the kinetic energy is increased, the total pressure is unchanged, and the static pressure is reduced. The flow channel is widened, the flow channel section is increased, the kinetic energy is reduced, the static pressure is increased, namely the fluid in the flow channel meets Bernoulli principle, and the equation is as follows:
where P is hydrostatic pressure, v is velocity, C is constant, h is height, g is gravitational acceleration.
As shown in fig. 4, for adjacent first and second flow paths, positions 6 and 7 are the points of the first flow path upper normal section 3 and the narrowed section 5, positions 8 and 9 are the points of the second flow path upper normal section 3 and the widened section 4, positions 6 and 8 are substantially aligned, positions 7 and 9 are substantially aligned, and when positions 6 and 8 are at or near the same pressure, position 7 is at a reduced pressure relative to 6 and position 9 is at an increased gas static pressure relative to position 8, as shown in the following:
when P 6 ＝P 8 ，v 6 ＝v 8 V when (v) 7 ＞v 6 ＝v 8 ＞v 9 ，h 7 ＞h 6 ＝h 8 ＝h 9 Therefore P 9 ＞P 8 ＝P 6 ＞P 7 The gas will diffuse from under the ridge from location 9 to location 7 at locations 7 and 9 under the influence of the pressure gradient, thereby promoting drainage under the ridge and improving cell performance. The law of other positions is the same along with the flow direction of the fluid.
The cathode air flow channel is narrowed or widened at a certain distance, so that the sectional area of the flow channel is changed, the fluid kinetic energy is changed, and the static pressure is changed under the condition that the total pressure is kept unchanged. The cross section of the narrowed part is reduced, the kinetic energy of the gas is increased, and the static pressure is reduced. The cross section of the widened part is increased, the kinetic energy of the gas is reduced, and the static pressure is increased, namely the flow channels on two sides of the ridge form a pressure difference. The two adjacent air flow channels are respectively narrowed or widened at the same position, so that the pressure gradient difference at the position of the two flow channels is enlarged, the transfer of gas between the two flow channels is promoted, the drainage efficiency under the ridge is improved, and the battery performance is improved.
Fig. 5 is a sectional view of the position A-A in fig. 3, in which the normal section 3 of the air flow channel has a channel width of l1 and a channel depth of d1, wherein the upper flow channel of the cathode plate 1 provides air flow, the lower flow channel of the anode plate 2 provides hydrogen flow, and the gap formed between the two plates provides cooling liquid flow. The gas flow direction is inward or outward perpendicular to the cross section and the coolant flow direction is parallel to the cross section. The flowing part of the cooling liquid fully contacts all parts of the polar plates, and the fluid turns over up and down in the gap of the polar plates, thereby improving the heat exchange efficiency.
Fig. 6 is a sectional view of the position B-B in fig. 3, in which the width of the air channel in the widening section 4 and the narrowing section 5 of the air channel is increased in the widening section 4 of the cathode plate 1, so that the cathode cooling liquid side ridge 1-1 of the anode plate 2 is attached to the side wall of the anode cooling liquid side groove 2-2, and the two plates are contacted with each other to restrain the positioning between the cathode plate 1 and the anode plate 2, thereby improving the positioning accuracy of the two plates. Meanwhile, in the narrowed section 5 of the cathode plate 1, the convex degree of the cathode coolant side ridge 1-1 is small, the depth of the air flow passage is reduced, the air flow cross-sectional area is reduced, the gap between the anode plate 2 and the cathode plate 1 is increased, and the coolant flow path 10 is increased.
Fig. 7 is an enlarged schematic view of a cross section of the two adjacent flow channels in fig. 6 at the variable diameter position, wherein the width l2 and depth d2 of the flow channel in the narrowing section 5, the width l3 of the flow channel in the widening section 4, and the depth d1 the same as that of the flow channel in the normal section 3 (the non-variable diameter position). Wherein l2 is less than l1 and less than l3, and d2 is less than d1.
Fig. 8 is a sectional view of the position C-C in fig. 3, and it can be seen that the depth of the air flow path in the fluid flow direction is changed, and the narrowed section 5 is raised relative to the bottom surface of the other position, so that the cooling liquid flow path 10 is increased, thereby ensuring smooth flow of the cooling liquid and improving heat dissipation capability.
Fig. 9 is a flow field schematic diagram of an anode plate 2, in which the flow channel of the anode plate 2 is relatively simple, and has no special structure by adopting parallel flow channels. But a plurality of support bosses 11 are arranged on the anode coolant side concave groove 2-2, and the support bosses 11 are contacted with the cathode coolant side convex ridges 1-1 of the cathode plate 1 so as to support the gap between the two polar plates, thereby further ensuring the smoothness of the coolant flow path 10. The height design of the supporting boss 11 determines the distance between the two pole plates, and the height is selected to meet the minimum requirements of the circulation flux and the flow of the cooling liquid based on the overall heat dissipation requirement of the electric pile, and meanwhile, the thickness of the bipolar pole plate section is reduced to improve the overall volume specific power density of the electric pile. As shown in fig. 8, 9 and 10, the support boss 11 has a convex structure from the anode gas side ridge 2-1 of the anode plate 2 to the second side, and the flow field ridge plane is recessed toward the coolant side to form a back support boss 11 for supporting the gap between the two plates.
The application also provides a fuel cell which uses the high volume ratio power bipolar plate flow field structure.
The foregoing describes in detail preferred embodiments of the present application. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the application by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a high volume ratio power bipolar plate flow field structure, its characterized in that includes anode plate and negative plate, the first side of anode plate is equipped with hydrogen flow field structure, the first side of negative plate is equipped with air flow field structure, anode plate and negative plate nest each other, form coolant liquid flow field structure between the second side of anode plate and the second side of negative plate, hydrogen flow field structure includes a plurality of hydrogen runners, air flow field structure includes a plurality of air runners, be equipped with normal section, narrowing section and widening section on the air runner, and the narrowing section of one runner aligns with the widening section of its adjacent runner.
2. The high volume ratio power bipolar plate flow field structure of claim 1, wherein the anode plate face is convex toward the first side and forms a plurality of anode gas side ridges, hydrogen flow channels are formed between adjacent anode gas side ridges, and the anode gas side ridges form anode coolant side grooves on the second side of the anode plate;
the surface of the cathode plate protrudes towards the second side to form a plurality of cathode cooling liquid side ridges, the cathode cooling liquid side ridges form cathode air side grooves on the first side of the cathode plate, and the cathode air side grooves serve as air flow channels;
when the anode plate and the cathode plate are mutually nested, the plate surface of the anode plate is arranged between adjacent cathode cooling liquid side ridges, and the cathode cooling liquid side ridges are arranged in the anode cooling liquid side grooves.
3. A high volumetric power bipolar plate flow field structure according to claim 2, wherein said cathode gas side grooves increase in width at the widened section of said air flow passage and decrease in width at the narrowed section of said air flow passage.
4. A high volume ratio power bipolar plate flow field structure as claimed in claim 3, wherein said cathode coolant side ridges are in contact with the sidewalls of the anode coolant side grooves at the widened section of said air flow channel.
5. The high volume ratio power bipolar plate flow field structure of claim 2, wherein said anode coolant side grooves are provided with a plurality of support bosses in contact with the cathode coolant side ridges of the cathode plate.
6. The high volumetric power bipolar plate flow field structure of claim 5, wherein said support ledge is a raised structure from an anode gas side ridge of the anode plate to the second side.
7. A high volumetric power bipolar plate flow field structure as claimed in claim 1, wherein the depth of the air flow channel decreases and the gap between the anode plate and the cathode plate increases at the narrowed section of said air flow channel.
8. The high volume ratio power bipolar plate flow field structure of claim 1, wherein said hydrogen flow channels and air flow channels are identical in flow channel form.
9. The high volumetric power bipolar plate flow field structure of claim 1, wherein the flow directions of hydrogen and air are parallel and reversed, and the flow direction of the cooling fluid is perpendicular to the flow direction of the gas.
10. A fuel cell employing the high volumetric power bipolar plate flow field structure of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310771549.XA CN116805697A (en) | 2023-06-28 | 2023-06-28 | High volume ratio power bipolar plate flow field structure and fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310771549.XA CN116805697A (en) | 2023-06-28 | 2023-06-28 | High volume ratio power bipolar plate flow field structure and fuel cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117650255A (en) * | 2024-01-29 | 2024-03-05 | 南昌大学 | Fuel cell with flow channel of local bidirectional converging and diverging structure |
| CN117709287A (en) * | 2024-02-06 | 2024-03-15 | 中国石油大学(华东) | Dimension optimization design method for flexible bipolar plate of high-efficiency solid oxide fuel cell |
-
2023
- 2023-06-28 CN CN202310771549.XA patent/CN116805697A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117650255A (en) * | 2024-01-29 | 2024-03-05 | 南昌大学 | Fuel cell with flow channel of local bidirectional converging and diverging structure |
| CN117709287A (en) * | 2024-02-06 | 2024-03-15 | 中国石油大学(华东) | Dimension optimization design method for flexible bipolar plate of high-efficiency solid oxide fuel cell |
| CN117709287B (en) * | 2024-02-06 | 2024-05-07 | 中国石油大学(华东) | Dimension optimization design method for flexible bipolar plate of high-efficiency solid oxide fuel cell |
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