CN220253276U - Fuel cell bipolar plate and fuel cell - Google Patents
Fuel cell bipolar plate and fuel cell Download PDFInfo
- Publication number
- CN220253276U CN220253276U CN202321292213.7U CN202321292213U CN220253276U CN 220253276 U CN220253276 U CN 220253276U CN 202321292213 U CN202321292213 U CN 202321292213U CN 220253276 U CN220253276 U CN 220253276U
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- fluid
- fuel cell
- bipolar plate
- reaction gas
- diversion trench
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- 239000000446 fuel Substances 0.000 title claims abstract description 62
- 239000012530 fluid Substances 0.000 claims abstract description 95
- 239000012495 reaction gas Substances 0.000 claims abstract description 56
- 230000003197 catalytic effect Effects 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims description 38
- 239000012528 membrane Substances 0.000 claims description 30
- 239000000376 reactant Substances 0.000 claims description 20
- 239000012466 permeate Substances 0.000 claims description 14
- 230000002708 enhancing effect Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 238000006479 redox reaction Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000006163 transport media Substances 0.000 description 1
Landscapes
- Fuel Cell (AREA)
Abstract
The utility model discloses a fuel cell bipolar plate and a fuel cell, wherein the fuel cell bipolar plate comprises a main body, a diversion trench and a plurality of fluid enhancement components; the main part one end is equipped with the fluid entry, and the other end is equipped with the fluid export for supply the fluid to pass through, and the guiding gutter is concave to be located the surface of main part, guiding gutter and fluid entry, fluid export intercommunication for supply the fluid to pass through, a plurality of fluid enhancement parts locate in the guiding gutter, a plurality of fluid enhancement parts distribute in proper order from the direction of fluid entry towards the fluid export for strengthen the fluidic intensity. According to the bipolar plate disclosed by the utility model, after the reaction gas enters the diversion trench, the flow direction of the reaction gas can be changed for a plurality of times, so that the capability of the reaction gas for penetrating the catalytic layer is improved, and better reaction efficiency is obtained.
Description
Technical Field
The utility model relates to the technical field of fuel cells, in particular to a bipolar plate of a fuel cell and the fuel cell.
Background
The fuel cell mainly comprises end plates, bipolar plates, membrane electrodes and other parts, wherein the bipolar plates are used as one of core parts of the fuel cell, support the membrane electrode assemblies, collect current, transmit and distribute reaction gases, and simultaneously drain water and dissipate heat, which is important for the utilization rate of the reaction gases and the water management and the thermal management of the fuel cell. The liquid water generated in the porous electrode of the fuel cell needs to be removed in time to achieve effective transport of the reactant gases and efficient operation of the fuel cell. The flow channels on the bipolar plates of the fuel cell are important transmission channels for the reaction gas and the reaction products, and directly affect the mass transfer efficiency and the performance of the whole fuel cell. Besides the main functions of reactant isolation, reactant gas distribution, current collection and membrane electrode support are the fuel cell flow field plates, bipolar plates are also required for discharging heat and reaction product water of the fuel cell system, and the flow channel structures on the bipolar plates not only directly influence the diffusion and mass transfer of the reactant gas to the gas diffusion layer, but also indirectly influence the electrochemical reaction.
The structure of the existing flow channel mostly adopts a straight-through flow channel and a winding flow channel; the straight-through flow channel is short in velocity of gas and high in concentration of gas at the inlet, and can provide uniform gas distribution, so that the reaction gas is uniformly attached to the surface of the catalytic layer; while serpentine channels are a series of continuous curves, resembling "snakes", in that the residence time of the gas in the channel is long due to the channel curve arrangement. However, the above scheme has the following disadvantages: because the inner side walls of the straight-through type runner and the winding type runner are both arranged smoothly, the reaction gas is difficult to uniformly permeate into the catalytic layer to react when passing through the runner, and the reaction efficiency of the gas is low.
Disclosure of Invention
The utility model mainly aims to provide a bipolar plate of a fuel cell, and aims to solve the problem that the existing bipolar plate is difficult to enable reaction gas to better permeate into a catalytic layer, so that the gas reaction efficiency is low.
To achieve the above object, the present utility model provides a bipolar plate for a fuel cell, comprising:
a main body, one end of which is provided with a fluid inlet, and the other end of which is provided with a fluid outlet for fluid to pass through;
the diversion trench is concavely arranged on the surface of the main body, and is communicated with the fluid inlet and the fluid outlet and used for allowing fluid to pass through;
the fluid enhancement parts are arranged in the diversion trenches and are sequentially distributed from the fluid inlet to the fluid outlet and used for enhancing the strength of the fluid.
In some embodiments, the fluid enhancement member includes a plurality of first protrusions protruding from an inner sidewall of the flow channel.
In some embodiments, the first protrusions are each provided with an inclined surface, and the inclined surface is used for changing the flow direction of the reaction gas entering the diversion trench from the fluid inlet.
In some embodiments, the inclined surface is disposed inclined toward the fluid inlet.
In some embodiments, one end of the first protrusions away from the bottom of the diversion trench is arc-shaped.
In some embodiments, the first protrusions extend along a bottom of the flow guiding groove, and an end of the first protrusions opposite to the bottom of the flow guiding groove gradually approaches to a notch of the flow guiding groove, so that the flow guiding groove between the fluid inlet and the fluid outlet has an inclined section.
The utility model further provides a fuel cell which comprises a membrane electrode and the fuel cell bipolar plate, wherein the membrane electrode is attached to one surface of the bipolar plate, which is provided with the diversion trench and the fluid enhancement component, and a fluid channel is formed between the membrane electrode and the diversion trench and is used for allowing reactant gas to pass through and permeate into the catalytic layer to react.
The technical scheme of the utility model has the beneficial effects that: through set up a guiding gutter on the main part surface for supply reactant gas to pass through, the rethread sets up fluid enhancement part in the guiding gutter for change reactant gas flow's direction and direction of distribution, with intensity and the kinetic energy of reinforcing reactant gas, make reactant gas can be better permeate to in the catalytic layer of membrane electrode, and then promote reactant gas's reaction efficiency. During the flow of reactant gas from the fluid inlet to the fluid outlet, the reactant gas is frequently redirected by the fluid enhancement member. Compared with the prior straight-through flow channel and the winding flow channel, the bipolar plate provided by the utility model has the advantages that after the reaction gas enters the flow guide groove, the flow direction of the reaction gas can be changed for a plurality of times, so that the capability of penetrating into the catalytic layer is improved, and better reaction efficiency is obtained.
Drawings
FIG. 1 is a schematic view of a fuel cell bipolar plate according to an embodiment of the present utility model;
FIG. 2 is a schematic view of another embodiment of a bipolar plate for a fuel cell according to the present utility model;
FIG. 3 is a schematic view of a fuel cell bipolar plate according to another embodiment of the present utility model;
fig. 4 is a schematic structural view of a further embodiment of a bipolar plate for a fuel cell according to the present utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Main body | 101 | Diversion trench |
| 101a | Fluid inlet | 101b | Fluid outlet |
| 201 | First protrusion | 201a | Inclined surface |
| 300 | Membrane electrode |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made more clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a bipolar plate of a fuel cell, which is mainly applied to the fuel cell, for example, the strength of reaction gas is enhanced, so that the reaction gas can well permeate into a catalytic layer to fully react.
As shown in fig. 1, the subject matter of the present utility model comprises a main body 100, a flow guide groove 101, and a plurality of fluid enhancement members, wherein:
one end of the main body 100 is provided with a fluid inlet 101a for inputting a reaction gas to an anode of the fuel cell from the gas supply system, and the other end of the main body 100 is provided with a fluid outlet 101b for allowing the reaction gas to flow back into the gas supply system for circulation;
the diversion trench 101 is concavely arranged on the surface of the main body 100, and the diversion trench 101 is communicated with the fluid inlet 101a and the fluid outlet 101b and is used for allowing fluid to pass through;
the fluid reinforcing members are arranged in the diversion trench 101, are sequentially distributed from the fluid inlet 101a to the fluid outlet 101b, and are used for reinforcing the strength of the fluid. It should be noted that, the shape of the main body 100 as a device for carrying the diversion trench 101 and the fluid enhancement member may be square, circular, etc., and is adjusted according to the actual use situation of the fuel cell, and is not particularly limited herein, in addition, the main body 100 is used as an electron transport medium, which has a certain conductive property, and during operation, electrons on the anode side of the fuel cell need to flow back to the cathode side through the external circuit of the main body 100 to complete the closing of the circuit, and is made of conductive materials such as carbon fiber, metal, silicon carbide, etc.
It is understood that the fluid enhancing member is a member for better penetrating the reaction gas into the catalytic layer, and is distributed inside the flow guiding groove 101, and specifically, the fluid enhancing member may be distributed at the bottom of the flow guiding groove 101, or may be distributed at the bottom of the flow guiding groove 101 and the inner side wall of the flow guiding groove 101, and is not particularly limited herein. The shape of the fluid-reinforcing member may be rectangular, circular, triangular, zigzag, etc., and is not particularly limited herein.
The fuel cell referred to in this embodiment is exemplified by a hydrogen fuel cell, and the electrochemical reaction during operation is exemplified by the oxidation reaction and the oxidation-reduction reaction of hydrogen fuel to produce electric energy. The fuel cell is generally composed of an end plate, a bipolar plate, a membrane electrode 300, and other components, and a region between the membrane electrode 300 and the bipolar plate for separating hydrogen ions and electrons is formed, that is, a seamless bonding is not adopted between the membrane electrode 300 and the bipolar plate, and a certain space, that is, a fluid channel, exists between the membrane electrode 300 and the bipolar plate, and the fluid channel can be a straight-through type or a serpentine type, and the embodiment is not limited in particular.
In the use process of the bipolar plate of the fuel cell of this embodiment, the reaction gas is injected into the anode side of the fuel cell from the fluid inlet 101a of the bipolar plate by the reaction gas supply system, the anode side of the fuel cell is provided with the catalytic layer of the membrane electrode 300, at this time, the reaction gas enters the flow guide groove 101, and under the action of the gas supply system gas pressure, the reaction gas impinges on the fluid enhancement member, the fluid enhancement member changes the conveying direction of the reaction gas, that is, the reaction gas is sprayed towards the catalytic layer of the membrane electrode 300 under the action of the fluid enhancement member, in the process that the reaction gas flows from the fluid inlet 101a to the fluid outlet 101b, the fluid enhancement member continuously changes the flowing direction of the reaction gas, wherein most of the hydrogen permeates into the catalytic layer to react after contacting the surface of the catalytic layer, and then the hydrogen begins to decompose protons and electrons, namely, h2h++ 2e- (wherein H2 represents hydrogen, h+ represents protons, e-represents electrons, and the component of the catalytic layer may be platinum, etc.); the protons flow through the proton exchange membrane of the membrane electrode 300 to the cathode of the fuel cell, and the electrons flow back to the cathode of the fuel cell through an external circuit, so that electric energy is generated in the process and can be used for doing work, such as driving an electric appliance such as a motor, and the electrons flowing back to the cathode are converged with the protons and oxygen, and undergo oxidation-reduction reaction under the action of the catalytic layer to generate water, and are discharged by the purging action of the oxygen.
The fuel cell bipolar plate of the embodiment is provided with the diversion trench 101 on the surface of the main body 100 for allowing the reactant gas to pass through, and the fluid enhancement component is arranged in the diversion trench 101 for changing the flowing direction and the distribution direction of the reactant gas so as to enhance the strength and the kinetic energy of the reactant gas, so that the reactant gas can better permeate into the catalytic layer of the membrane electrode 300, and further the reaction efficiency of the reactant gas is improved. The flow direction of the reaction gas is frequently changed by the fluid enhancing member in the process of flowing the reaction gas from the fluid inlet 101a to the fluid outlet 101 b. Compared with the prior art that the inner side walls of the straight-through flow channel and the winding flow channel are both smooth, the bipolar plate of the embodiment can change the flow direction of the reaction gas for many times after the reaction gas enters the flow guide groove 101 so as to improve the capability of the reaction gas penetrating into the catalytic layer and obtain better reaction efficiency.
With continued reference to fig. 1, further, the fluid enhancement member includes a plurality of first protrusions 201, the plurality of first protrusions 201 protrude from the inner side wall of the flow guiding groove 101, specifically, the distance that the plurality of first protrusions 201 protrude from the inner side wall of the flow guiding groove 101 does not exceed the notch of the flow guiding groove 101, that is, a space exists between one end of the plurality of first protrusions 201 and the catalytic layer of the membrane electrode 300, when the reaction gas flows through the area, as the plurality of first protrusions 201 block part of the flow channels, the backward flow resistance of the reaction gas is increased, so that a certain pressure gradient is formed between the front and back of the plurality of first protrusions 201, and the larger pressure promotes the reaction gas to diffuse and permeate into the catalytic layer more easily, so as to improve the reaction efficiency.
In order to further enhance the capability of the reactant gas to permeate into the catalytic layer, in the present embodiment, an inclined surface 201a is provided on the plurality of first protrusions 201, and it should be noted that the angle of the inclined surface 201a may be 45 °, but is not limited thereto. In addition, the opening position of the fluid inlet 101a is adjusted according to the shape of the first protrusion 201, for example, in this embodiment, the fluid inlet 101a is disposed towards the inclined surface 201a, that is, the injection end of the fluid inlet 101a is located between the heights of the inclined surface 201a, and the injection end of the fluid inlet 101a is preferably perpendicular to the middle of the inclined surface 201a, so as to further increase the strength of the reaction gas. Specifically, the inclined surface 201a is arranged facing the flow direction of the reaction gas, the reaction gas reaches the surface of the inclined surface 201a during the operation of the fuel cell, the inclined surface 201a changes the flow direction of the reaction gas, so that the reaction gas directly impacts towards the catalytic layer, and the inclined surface 201a can generate local disturbance, so that the kinetic energy and the speed of the flow of the reaction gas are increased, the reaction gas can fully permeate into the catalytic layer to fully react, and the power density of the fuel cell is improved.
In another embodiment, the ends of the first protrusions 201 away from the bottom of the groove 101 are arc-shaped, as shown in fig. 2. In the present embodiment, the end of the first protrusion 201 is provided with an arc shape, but the end of the first protrusion 201 may be provided with an inclined surface 201a, so that the arc-shaped protrusion may generate rotation and vortex in the gas flow, thereby enhancing the kinetic energy and strength of the reaction gas, allowing the reaction gas to penetrate into the catalytic layer well for sufficient reaction, and further improving the reaction efficiency of the fuel cell.
Referring to fig. 4, in the present embodiment, instead of providing a plurality of first protrusions 201 having inclined surfaces 201a on the main body 100 alone and providing the ends of the first protrusions 201 outside in an arc shape, the two may be provided in a mixed manner, and of course, in other embodiments, the ends of the first protrusions 201 may be provided in a tapered shape, a trapezoid shape, or the like, without being limited thereto.
Further, the fluid path between the fuel cell bipolar plate and the membrane electrode 300 may be in the form of a convergent-divergent, as shown in fig. 3. Specifically, the first protrusions 201 extend along the bottom of the diversion trench 101, and at the same time, one end of the first protrusions 201 facing away from the bottom of the diversion trench 101 gradually approaches the catalytic layer, that is, the area inside the fluid channel gradually decreases from one end of the fluid channel to the other end, and the first protrusions 201 form a certain gradient F in the fluid channel.
The fluid channel can be divided into an expansion section and a contraction section, wherein the expansion section is a part with wider area of the fluid channel, the contraction section is a part with reduced area of the fluid channel, and the flow rate and pressure of the gas can be increased by reducing the area of the reaction gas flowing through the area; when the reaction gas enters the expansion section, the gas speed is reduced, the pressure is increased, so that the reaction gas is fully mixed to be uniformly attached to the surface of the catalytic layer, and the reaction gas can be fully permeated into the catalytic layer for reaction under the effect that the flow direction of the reaction gas is directly sprayed towards the catalytic layer by adding the first bulge 201 arranged in the fluid channel; when the reaction gas passes through the expansion section from the contraction area, the gas speed is increased, and compared with the expansion area, the pressure is reduced, and non-uniformity such as vortex and turbulence can be generated when the reaction gas impacts on the surface of the first bulge 201, so that the mixing and diffusion of the gas are promoted, the gas permeability is improved, and the reaction efficiency is further improved.
The present utility model further provides a fuel cell, which includes the membrane electrode 300 and the bipolar plate, and the specific structure of the bipolar plate refers to the above embodiments, and since the fuel cell adopts all the technical solutions of all the embodiments, at least all the technical effects brought by the technical solutions of the embodiments are provided, and will not be described in detail herein. The membrane electrode 300 is attached to the surface of the bipolar plate, where the fluid enhancement component is provided, and a fluid channel is formed between the membrane electrode 300 and the bipolar plate main body 100, so that the reaction gas can pass through and permeate into the catalytic layer to react. It should be noted that, the membrane electrode 300 is composed of a proton exchange membrane and a catalytic layer, and the distance between the fluid enhancement member and the catalytic layer is one of factors affecting the performance of the fuel cell in this embodiment.
That is, the distance between the first protrusion 201 and the catalytic layer is not preferably too large or too small in order to maximize the distribution and diffusion of hydrogen gas on the catalytic layer, for example, keeping the distance between the first protrusion 201 and the catalytic layer in the range of several micrometers to several tens micrometers can ensure that the reaction gas sufficiently contacts the catalytic layer surface and permeates into the catalytic layer to sufficiently react. It is understood that if the distance between the first protrusion 201 and the catalytic layer is too small, the first protrusion 201 may affect the diffusion and transport of hydrogen, and if the distance between the first protrusion 201 and the catalytic layer is too large, the permeation capability of the reaction gas may be caused, thereby affecting the performance of the fuel cell.
In the operation process of the fuel cell of this embodiment, the reaction gas enters the anode of the fuel cell from the fluid inlet 101a, and in this process, the flow direction of the reaction gas is continuously changed due to the presence of the fluid reinforcing member, so that the reaction gas is sprayed toward the catalytic layer, at this time, the kinetic energy and the velocity of the reaction gas flowing through the region are improved, so that the reaction gas can more fully permeate into the catalytic layer to fully react, and then the protons and electrons are decomposed by the hydrogen; wherein protons flow through the proton exchange membrane of the membrane electrode 300 to the cathode of the fuel cell, electrons flow back to the cathode of the fuel cell through an external circuit, and the process generates electric energy which can be used for doing work, such as driving electric appliances such as a motor; the electrons flowing back to the cathode are merged with protons, and undergo oxidation-reduction reaction with oxygen injected into the cathode of the fuel cell on the catalytic layer to generate water, which is discharged under the purge action of oxygen. That is, the fluid enhancement member may create a localized disturbance that enhances the kinetic energy and velocity of the reactant gas flow so that it can better penetrate into the catalytic layer for sufficient reaction, thereby enhancing the power density of the fuel cell.
The above description of the preferred embodiments of the present utility model should not be taken as limiting the scope of the utility model, but rather should be understood to cover all modifications, variations and adaptations of the present utility model using its general principles and the following detailed description and the accompanying drawings, or the direct/indirect application of the present utility model to other relevant arts and technologies.
Claims (5)
1. A fuel cell bipolar plate comprising:
a main body, one end of which is provided with a fluid inlet, and the other end of which is provided with a fluid outlet for fluid to pass through;
the diversion trench is concavely arranged on the surface of the main body, and is communicated with the fluid inlet and the fluid outlet and used for allowing fluid to pass through;
the fluid enhancement components are arranged in the diversion trench, are sequentially distributed from the fluid inlet to the fluid outlet and are used for enhancing the strength of fluid;
the fluid enhancement parts comprise a plurality of first bulges which protrude from the bottom wall of the diversion trench and are closely distributed along the bottom wall of the diversion trench;
and inclined surfaces are arranged on the first protrusions and used for changing the flow direction of the reaction gas entering the diversion trench.
2. The fuel cell bipolar plate of claim 1 wherein the inclined surface is disposed obliquely toward the fluid inlet.
3. The bipolar plate of claim 2 wherein the ends of the first plurality of protrusions remote from the channel bottom are arcuate.
4. A fuel cell bipolar plate according to claim 2 or 3, wherein the ends of the first plurality of protrusions are gradually spaced apart from the bottoms of the flow channels in the direction of distribution so as to form a slope between the fluid inlet and the fluid outlet.
5. A fuel cell comprising a membrane electrode and the fuel cell bipolar plate of any one of claims 1-4, wherein the membrane electrode is arranged on the surface of the fuel cell bipolar plate provided with the plurality of fluid enhancement components, and a fluid channel is formed between the membrane electrode and the diversion trench and is used for allowing reactant gas to pass through and permeate into a catalytic layer of the membrane electrode to react.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321292213.7U CN220253276U (en) | 2023-05-25 | 2023-05-25 | Fuel cell bipolar plate and fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321292213.7U CN220253276U (en) | 2023-05-25 | 2023-05-25 | Fuel cell bipolar plate and fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220253276U true CN220253276U (en) | 2023-12-26 |
Family
ID=89264780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321292213.7U Active CN220253276U (en) | 2023-05-25 | 2023-05-25 | Fuel cell bipolar plate and fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220253276U (en) |
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2023
- 2023-05-25 CN CN202321292213.7U patent/CN220253276U/en active Active
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