CN217114451U - Polar plate and fuel cell - Google Patents
Polar plate and fuel cell Download PDFInfo
- Publication number
- CN217114451U CN217114451U CN202221051589.4U CN202221051589U CN217114451U CN 217114451 U CN217114451 U CN 217114451U CN 202221051589 U CN202221051589 U CN 202221051589U CN 217114451 U CN217114451 U CN 217114451U
- Authority
- CN
- China
- Prior art keywords
- channel
- reaction
- flow field
- reaction unit
- field reaction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fuel Cell (AREA)
Abstract
The utility model provides a polar plate and fuel cell, the polar plate includes inlet area, flow field reaction zone and outlet area, and the inlet area is through flow field reaction zone and outlet area intercommunication. The flow field reaction zone comprises a plurality of flow field reaction channels, each flow field reaction channel comprises a plurality of reaction units, each reaction unit comprises a first channel, a second channel and a converging channel, and the converging channel converges substances flowing from the first channel and the second channel. Because the first passageway, the second passageway in the flow field reaction zone of polar plate and the passageway that converges wholly form into two unification runner structures, it enables the laminar flow form and changes the torrent form into, and then make fuel gas to the diffusion on proton exchange membrane converging passageway department, strengthened electrochemical reaction from this, reduced piling up of liquid water in the runner, and then alleviated "flooding" phenomenon, strengthened mass transfer and heat transfer ability, make from this the utility model discloses a fuel cell possesses more excellent performance.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a polar plate and fuel cell.
Background
The water management problem of the fuel cell has a great influence on the performance of the fuel cell, and when the water content in the fuel cell is insufficient, the proton exchange membrane is in a dehydration state, so that the proton conductivity of the membrane is rapidly reduced, and the normal operation of the fuel cell is seriously influenced. When the water content in the fuel cell is too high, a 'water logging' phenomenon is easy to occur, and a gas flow channel, a gas diffusion layer and even a catalytic layer are submerged by water, so that reactant gas cannot reach a reaction site to participate in reaction, and the performance of the fuel cell is rapidly deteriorated.
The flow channel of the polar plate of the fuel cell is reasonably designed, so that the flow field distribution of reactant gas can be effectively improved, and the liquid state in the flow channel is reduced. At present, technologies for preventing water flooding are mainly focused on flow channel structures of a polar plate, common flow channel structures include a snake-shaped flow channel, an interdigitated flow channel and various bionic flow channels, and the flow channel structures cannot well solve the problem of water flooding.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, provided a carry polar plate and fuel cell.
In a first aspect, the plate of the present invention comprises an air inlet region, a flow field reaction region, and an air outlet region, wherein the air inlet region is in communication with the air outlet region through the flow field reaction region. The flow field reaction zone comprises a plurality of flow field reaction channels which are arranged at intervals. Each flow field reaction channel comprises a plurality of reaction units, each reaction unit comprises a first channel, a second channel and a converging channel, and the converging channel is communicated with the first channel and the second channel and converges substances flowing from the first channel and the second channel. The air inlet area and the air outlet area are respectively communicated with the first channel and the second channel of the corresponding reaction unit of each flow field reaction channel.
Further, the plurality of reaction units of each flow field reaction channel include a first reaction unit, a second reaction unit and a third reaction unit. The first reaction unit is arranged close to the air inlet area, the third reaction unit is arranged close to the air outlet area, and the second reaction unit is arranged between the first reaction unit and the third reaction unit.
Furthermore, the number of the second reaction units of each flow field reaction channel is multiple, and the lengths of the multiple second reaction units are sequentially increased.
Further, the first channel of each reaction unit includes a straight section and an inclined section, and the straight section is connected to the inclined section.
Furthermore, the inclined section of the first channel of the first reaction unit and the inclined section of the first channel of the third reaction unit are one section, the straight section of the first reaction unit is close to the air inlet area, and the straight section of the third reaction unit is close to the air outlet area. The inclined section of the first channel of the second reaction unit is two sections, the straight section of the second reaction unit is positioned between the two inclined sections and is connected with the two inclined sections, and the inclined section of the second reaction unit is connected with the converging channel of the adjacent reaction unit.
Further, the second channel is structurally identical to the first channel.
Furthermore, the plurality of flow field reaction channels comprise a first flow field reaction channel and a second flow field reaction channel, and the second flow field reaction channel and the first flow field reaction channel are arranged in a positive opposite mode or in a staggered mode.
Further, the plate further comprises a first distribution area, and the first distribution area is located between the air inlet area and the flow field reaction area and is used for distributing the fuel flowing from the air inlet area to the corresponding flow field reaction channel of the flow field reaction area.
Further, the plate further comprises a second distribution region, the second distribution region is located between the flow field reaction region and the gas outlet region, and is used for distributing the fuel flowing from the flow field reaction region to the corresponding gas outlet of the gas outlet region.
In a second aspect, the fuel cell of the present invention comprises an anode plate, a membrane electrode and a cathode plate arranged in a stacked manner, wherein at least one of the anode plate and the cathode plate is the above-mentioned electrode plate.
The utility model discloses following beneficial effect has:
the first channel, the second channel and the converging channel of the flow field reaction area of the polar plate are integrally formed into a two-in-one flow channel structure, so that a laminar flow form can be converted into a turbulent flow form, and further, the fuel gas is diffused to the proton exchange membrane at the converging channel, so that the electrochemical reaction is enhanced, and the electrochemical performance of the fuel cell is improved; simultaneously, based on two unification runner structures, the velocity of flow of liquid water also is showing and is improving, has reduced piling up of liquid water in the runner from this, and then has alleviated "water logging" phenomenon, has strengthened mass transfer and heat transfer ability, makes from this the utility model discloses a fuel cell possesses more excellent performance.
The summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. The summary is not intended to identify key features or essential features of the disclosure, nor is it intended to limit the scope of the disclosure.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
Fig. 1 shows a schematic structural view of a polar plate of the present invention;
FIG. 2 shows a schematic view of the structure of the flow field reaction zone of FIG. 1 in one embodiment;
FIG. 3 shows a schematic view of the structure of the flow field reaction zone of FIG. 1 in another embodiment;
fig. 4 shows a schematic view of a partial structure of a flow field reaction channel of the flow field reaction zone.
Wherein the reference numerals are as follows:
100. a polar plate; 1. an air inlet region; 2. a flow field reaction zone; 21. a flow field reaction channel; 211. a first channel; 2111. a straight section; 2112. an inclined section; 212. a second channel; 213. a converging channel; 3. an air outlet region; 4. a first distribution area; 5. a second distribution area.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.
The fuel cell of the present invention includes an anode plate, a membrane electrode (having a proton exchange function, hereinafter referred to as a proton exchange membrane) and a cathode plate, which are stacked, and at least one of the anode plate and the cathode plate employs a polar plate 100 described below.
Because the fuel cell of the present invention adopts the polar plate 100 described below, it improves the efficiency of gas diffusion onto the proton exchange membrane, enhances the electrochemical reaction in the fuel cell, and further improves the electrochemical performance of the fuel cell; the velocity of flow of liquid water has been improved simultaneously, has reduced piling up of liquid water in the runner, and then has alleviated "water logging" phenomenon, has strengthened mass transfer and heat transfer ability, makes from this the utility model discloses a fuel cell possesses more excellent performance.
Specifically, the fuel cell of the present invention may be a hydrogen-air fuel cell, or may be a hydrogen-oxygen fuel cell.
Referring to fig. 1 to 4, a plate 100 of the present invention includes an air inlet region 1, a flow field reaction region 2, and an air outlet region 3, wherein the air inlet region 1 is communicated with the air outlet region 3 through the flow field reaction region 2. Specifically, the plate 100 of the present invention may be made of graphite material or metal.
Referring to fig. 2 to 4, the flow field reaction zone 2 includes a plurality of flow field reaction channels 21, and the plurality of flow field reaction channels 21 are arranged at intervals. Each flow field reaction channel 21 includes a plurality of reaction units, each of which includes a first channel 211, a second channel 212, and a merging channel 213, and the merging channel 213 communicates with the first channel 211 and the second channel 212 and merges the substances flowing from the first channel 211 and the second channel 212. The gas inlet area 1 and the gas outlet area 3 are respectively communicated with the first channel 211 and the second channel 212 of the corresponding reaction unit of each flow field reaction channel 21 so as to realize the inlet and outlet of the fuel gas in the plate 100.
Because the first channel 211, the second channel 212 and the converging channel 213 of the flow field reaction zone 2 are integrally formed into a two-in-one flow channel structure, the laminar flow form can be converted into a turbulent flow form, and then the fuel gas is diffused to the proton exchange membrane at the converging channel 213, so that the electrochemical reaction is enhanced, and the electrochemical performance of the fuel cell is improved; simultaneously, based on two unification runner structures, the velocity of flow of liquid water also is showing and is improving, has reduced piling up of liquid water in the runner from this, and then has alleviated "water logging" phenomenon, has strengthened mass transfer and heat transfer ability, makes from this the utility model discloses a fuel cell possesses more excellent performance. In addition, the structure of the pole plate 100 is simple, the processing technology difficulty and the processing cost are reduced, and the feasibility is high.
Referring to fig. 2 and 3, for one of the flow field reaction channels 21, it includes a plurality of reaction units including a first reaction unit, a second reaction unit and a third reaction unit according to the positions of the reaction units. Wherein the first reaction unit is disposed near the inlet region 1 (i.e., the first reaction unit is located at the leftmost side in fig. 3), the third reaction unit is disposed near the outlet region 3 (i.e., the third reaction unit is located at the rightmost side in fig. 3), and the second reaction unit is located between the first reaction unit and the third reaction unit.
In some embodiments, referring to fig. 3, the number of the second reaction units is multiple, and the lengths of the multiple second reaction units are sequentially increased (i.e. L4> L3> L2> L1), so that the concentration gradient of the fuel gas in each flow field reaction channel 21 in the flow field reaction zone 2 is improved, the concentration distribution of the fuel gas is more uniform, the electrochemical reaction is further enhanced, and the electrochemical performance of the fuel cell is improved.
Referring to fig. 3 and 4, the first channel 211 of each reaction unit includes a straight section 2111 and an inclined section 2112, and the straight section 2111 is connected to the inclined section 2112. Specifically, the inclined section 2112 of the first channel 211 of each of the first reaction unit and the third reaction unit is one section, the straight section 2111 of the first reaction unit is disposed near the air inlet region 1, and the straight section 2111 of the third reaction unit is disposed near the air outlet region 3. The inclined section 2112 of the first channel 211 of the second reaction unit is two sections, the straight section 2111 of the second reaction unit is located between the two inclined sections 2112 and connected to the two inclined sections 2112, and the inclined section 2112 of the second reaction unit is connected to the merging channel 213 of the adjacent reaction unit.
Thus, each flow field reaction channel 21 is actually a continuous channel formed by a plurality of two-in-one flow channel structures, so that the fuel gas is diffused to the corresponding part of the proton exchange membrane at the corresponding converging channel 213, thereby enhancing the electrochemical reaction, relieving the phenomenon of flooding, and enhancing the mass transfer and heat exchange capacity.
Referring to fig. 4, the acute angle formed by the straight section 2111 and the inclined section 2112 of the first channel 211 of each reaction unit is a, since the size of the angle of a directly affects the performance of the plate 100, such as: the diffusion speed of the fuel gas to the proton exchange membrane can be increased by increasing the angle of A; the increase range of the flow velocity of each flow field reaction channel 21 of the flow field reaction zone 2 can be controlled by changing the angle of the A; the gas flow resistance of each flow field reaction channel 21 of the flow field reaction zone 2 can be controlled by changing the angle of the A, so that the angle of the A can be selectively determined according to actual requirements.
The smaller the angle of A is, the relatively smaller the flow resistance is, and the larger the angle of A is, the relatively larger the flow resistance is; and the larger the angle of a, the better the gas diffusivity, so in order to balance the flow resistance influence and the gas diffusivity performance for the optimal effect, the angle of a is preferably in the range of 30 to 50 °.
Referring to fig. 3 and 4, the second channel 212 of each reaction unit is identical in structure to the first channel 211.
Referring to fig. 2, the plurality of flow field reaction channels 21 include a first flow field reaction channel 21A and a second flow field reaction channel 21B, and the second flow field reaction channel 21B is disposed in a normal position opposite to the first flow field reaction channel 21A (i.e., the first channel 211, the second channel 212, and the merging channel 213 of the second flow field reaction channel 21B are disposed in a normal position facing the first channel 211, the second channel 212, and the merging channel 213 of the first flow field reaction channel 21A, respectively) or is disposed in a shifted position (i.e., the merging channel 213 of the second flow field reaction channel 21B is disposed in a normal position facing the first channel 211 or the second channel 212 of the first flow field reaction channel 21A).
Referring to fig. 1, the plate 100 further includes a first distribution region 4, and the first distribution region 4 is located between the air inlet region 1 and the flow field reaction region 2, and is used for uniformly distributing the fuel flowing through the air inlet region 1 to the corresponding flow field reaction channel 21 of the flow field reaction region 2.
Referring to fig. 1, the plate 100 further includes a second distribution region 5, and the second distribution region 5 is located between the flow field reaction region 2 and the gas outlet region 3, and is used for uniformly distributing the fuel flowing through the flow field reaction region 2 to the corresponding gas outlet of the gas outlet region 3.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A plate comprising an air inlet zone (1), a flow field reaction zone (2) and an air outlet zone (3), said air inlet zone (1) being in communication with said air outlet zone (3) through said flow field reaction zone (2),
the flow field reaction zone (2) comprises a plurality of flow field reaction channels (21), and the plurality of flow field reaction channels (21) are arranged at intervals;
each flow field reaction channel (21) comprises a plurality of reaction units, each reaction unit comprises a first channel (211), a second channel (212) and a converging channel (213), and the converging channel (213) is communicated with the first channel (211) and the second channel (212) and converges the substances which flow from the first channel (211) and the second channel (212);
the air inlet area (1) and the air outlet area (3) are respectively communicated with a first channel (211) and a second channel (212) of a corresponding reaction unit of each flow field reaction channel (21).
2. A plate according to claim 1,
the reaction units of each flow field reaction channel (21) comprise a first reaction unit, a second reaction unit and a third reaction unit;
the first reaction unit is arranged close to the air inlet area (1);
the third reaction unit is arranged close to the air outlet area (3);
the second reaction unit is arranged between the first reaction unit and the third reaction unit.
3. A plate as claimed in claim 2, wherein the second reaction cells of each flow field reaction channel (21) are plural in number, the lengths of the plural second reaction cells being progressively increased.
4. A plate according to claim 2, characterized in that the first channel (211) of each reaction unit comprises a straight section (2111) and an inclined section (2112), said straight section (2111) being connected to said inclined section (2112).
5. A plate according to claim 4,
the inclined section (2112) of the first channel (211) of the first reaction unit and the third reaction unit is one section, the flat section (2111) of the first reaction unit is close to the air inlet area (1), and the flat section (2111) of the third reaction unit is close to the air outlet area (3);
the inclined section (2112) of the first channel (211) of the second reaction unit is two sections, the straight section (2111) of the second reaction unit is positioned between the two inclined sections (2112) and is connected with the two inclined sections (2112), and the inclined section (2112) of the second reaction unit is connected with the merging channel (213) of the adjacent reaction unit.
6. A plate according to claim 1, wherein said second channels (212) are structurally identical to said first channels (211).
7. A plate as claimed in claim 1, wherein the plurality of flow field reaction channels (21) comprises a first flow field reaction channel (21A) and a second flow field reaction channel (21B), the second flow field reaction channel (21B) being disposed in a positive or negative alignment with respect to the first flow field reaction channel (21A).
8. A plate according to claim 1, further comprising a first distribution region (4), said first distribution region (4) being located between said inlet region (1) and said flow field reaction region (2) for distributing fuel flowing through said inlet region (1) to corresponding flow field reaction channels (21) of said flow field reaction region (2).
9. A plate according to claim 1, further comprising a second distribution area (5), said second distribution area (5) being located between said flow field reaction area (2) and said gas outlet area (3) for distributing fuel flowing through said flow field reaction area (2) to a corresponding gas outlet of said gas outlet area (3).
10. A fuel cell comprising an anode plate, a membrane electrode and a cathode plate arranged in a stack, wherein at least one of the anode plate and the cathode plate is the plate of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221051589.4U CN217114451U (en) | 2022-05-05 | 2022-05-05 | Polar plate and fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221051589.4U CN217114451U (en) | 2022-05-05 | 2022-05-05 | Polar plate and fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217114451U true CN217114451U (en) | 2022-08-02 |
Family
ID=82585699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221051589.4U Active CN217114451U (en) | 2022-05-05 | 2022-05-05 | Polar plate and fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217114451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799558A (en) * | 2023-01-31 | 2023-03-14 | 苏州氢澜科技有限公司 | Bipolar plate of fuel cell |
-
2022
- 2022-05-05 CN CN202221051589.4U patent/CN217114451U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799558A (en) * | 2023-01-31 | 2023-03-14 | 苏州氢澜科技有限公司 | Bipolar plate of fuel cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106816610B (en) | A kind of dual polar plates of proton exchange membrane fuel cell based on labyrinth baffle arrangement flow field | |
| CN109686995A (en) | A kind of interior bipolar plates with wedge-shaped protrusion of runner | |
| CN113314726B (en) | Arrow-feather-shaped bipolar plate of proton exchange membrane fuel cell | |
| KR100798451B1 (en) | Fuel cell separator and fuel cell stack and reactant gas control method thereof | |
| CN113299941B (en) | Proton exchange membrane fuel cell bipolar plate with parallelogram combined baffle | |
| CN112786913B (en) | Bipolar plate and fuel cell comprising same | |
| CN114695912B (en) | Flow field runner, bipolar plate and proton exchange membrane fuel cell | |
| CN217114451U (en) | Polar plate and fuel cell | |
| CN104821407A (en) | Vein-like fuel cell flow field structure, fuel cell bipolar plate, and fuel cell | |
| CN113745562A (en) | Cathode flow field plate, bipolar plate and PEMFC for PEMFC | |
| CN114204066A (en) | Tapered parallel snakelike runner structure and proton exchange membrane fuel cell | |
| CN112038658A (en) | Fuel cell flow field plate with discontinuous grooves and fuel cell | |
| CN210006824U (en) | Bipolar plate flow field structure and bipolar plate in fuel cells | |
| US20150364767A1 (en) | Porous electrode assembly, liquid-flow half-cell, and liquid-flow cell stack | |
| CN113707902A (en) | Bipolar plate of hydrogen fuel cell and hydrogen fuel cell | |
| WO2023241219A1 (en) | Fuel cell bipolar plate having bionic hexagonal flow channel | |
| CN209374562U (en) | A kind of interior bipolar plates with wedge-shaped protrusion of runner | |
| CN210489736U (en) | Flow field structure of fuel cell | |
| CN218731068U (en) | Bipolar plate for fuel cell | |
| CN116646551A (en) | Double-slope gas flow passage structure for proton exchange membrane fuel cell | |
| CN218160465U (en) | Low-hydrogen pressure fuel cell runner structure | |
| CN116826094A (en) | Flow guiding type porous flow passage for hydrogen fuel cell and bipolar plate structure | |
| CN116666696A (en) | Design method of bipolar plate runner of fuel cell, plate runner and cell | |
| CN214797474U (en) | Arrow-feather-shaped bipolar plate of proton exchange membrane fuel cell | |
| CN214797473U (en) | Double polar plate of proton exchange film fuel cell with parallelogram combined baffle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |