CN113437326A - Proton exchange membrane fuel cell bipolar plate and fuel cell - Google Patents
Proton exchange membrane fuel cell bipolar plate and fuel cell Download PDFInfo
- Publication number
- CN113437326A CN113437326A CN202110604730.2A CN202110604730A CN113437326A CN 113437326 A CN113437326 A CN 113437326A CN 202110604730 A CN202110604730 A CN 202110604730A CN 113437326 A CN113437326 A CN 113437326A
- Authority
- CN
- China
- Prior art keywords
- flow field
- flow
- fuel cell
- hydrogen
- plate
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 42
- 239000012528 membrane Substances 0.000 title claims abstract description 17
- 239000001257 hydrogen Substances 0.000 claims abstract description 54
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 54
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000110 cooling liquid Substances 0.000 claims abstract description 39
- 239000002826 coolant Substances 0.000 claims description 25
- 239000007789 gas Substances 0.000 abstract description 16
- 238000012546 transfer Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- 230000010287 polarization Effects 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000001788 irregular Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004913 activation 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
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000006727 cell loss Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The present disclosure relates to a proton exchange membrane fuel cell bipolar plate and a fuel cell, the bipolar plate comprises an anode plate and a cathode plate which are arranged in a stacking manner, a hydrogen flow field is arranged on the front surface of the anode plate, an air flow field is arranged on the front surface of the cathode plate, and a cooling liquid flow field is arranged between the back surface of the anode plate and the back surface of the cathode plate, wherein the hydrogen flow field, the air flow field and the cooling liquid flow field respectively at least comprise: the hydrogen flow field and the air flow field are arranged in opposite directions and form an included angle with the flow direction of the cooling liquid flow field. The first point-shaped flow channel area is a distribution area, the first point-shaped flow channel area can distribute incoming flow of gas or cooling liquid, flow far away from an inlet position is adjusted, flow of the gas or the cooling liquid of each flow channel in the winding flow channel area is uniformly distributed, mass transfer capacity under different current densities is enhanced, and the volume of the bipolar plate is reduced under the condition that the cooling effect is ensured.
Description
Technical Field
The present disclosure relates to the field of fuel cell technology, and in particular, to a proton exchange membrane fuel cell bipolar plate and a fuel cell.
Background
A fuel cell is a device that directly converts chemical energy of fuel into electrical energy. Proton Exchange Membrane Fuel (PEMFC) cells are called ultimate green energy sources due to their advantages of high efficiency, no pollution, light weight, etc. With the development of the fuel cell industry, various application scenarios such as passenger cars, commercial vehicles, heavy trucks, etc. have higher and higher technical requirements on the fuel cell, so that the performance loss of the fuel cell is reduced, and the performance of the fuel cell is promoted at the forefront.
In the related art, the performance loss of the proton exchange membrane fuel cell can be divided into three parts according to the principle: activation polarization loss, ohmic polarization loss, concentration polarization loss. Wherein the fuel cell loss is mainly represented by activated polarization at low current density and ohmic polarization loss at medium current density, and is mainly caused by concentration polarization at high current density, and the loss of reactant concentration and accumulation of products in the catalytic layer lead to severe fuel cell performance loss due to poor mass transport. Therefore, careful optimization of mass transfer in a flow field structure of the fuel cell is urgently needed, the mass transfer capacity of the PEMFC under the current density is enhanced, and the net output power of the fuel cell is improved.
Disclosure of Invention
An object of the present disclosure is to provide a proton exchange membrane fuel cell bipolar plate and a fuel cell to at least partially solve the problems in the related art.
In order to achieve the above object, the present disclosure provides a proton exchange membrane fuel cell bipolar plate, including an anode plate and a cathode plate arranged in a stacked manner, a hydrogen flow field is provided on a front surface of the anode plate, an air flow field is provided on a front surface of the cathode plate, and a cooling liquid flow field is provided between a back surface of the anode plate and a back surface of the cathode plate, wherein the hydrogen flow field, the air flow field, and the cooling liquid flow field respectively at least include: the hydrogen flow field and the air flow field are arranged in opposite directions and are arranged at an included angle with the flow direction of the cooling liquid flow field.
Optionally, the hydrogen inlet and the hydrogen outlet of the hydrogen flow field and the air inlet and the air outlet of the air flow field are respectively located at two ends of the corresponding pole plate and are arranged in a staggered manner.
Optionally, the hydrogen flow field, the air flow field, and the cooling liquid flow field each further include a second dotted flow channel region at an outlet end, and the second dotted flow channel region is communicated with the first dotted flow channel region through the serpentine flow channel region.
Optionally, the inlet end of the cooling liquid flow field is provided with a plurality of cooling liquid inlets, the outlet end of the cooling liquid flow field is provided with a plurality of cooling liquid outlets, the first dotted flow passage region and the second dotted flow passage region of the cooling liquid flow field respectively have a plurality of overlapping regions extending into the meandering flow passage region, and the plurality of overlapping regions are respectively arranged near the cooling liquid inlets and the cooling liquid outlets.
Optionally, the first dotted runner region and the second dotted runner region are respectively configured as a plurality of rows of cylindrical protrusions formed on the corresponding plate, and the plurality of cylindrical protrusions of each adjacent row are arranged in a staggered manner.
Optionally, the meandering flow channel region of the cooling liquid flow field is configured as a groove-shaped flow channel formed by a plurality of strip-shaped protrusions which are arranged at equal intervals and have different lengths, the height of each strip-shaped protrusion is 0.1mm to 0.6mm, the width of each strip-shaped protrusion is 0.6mm to 1.0mm, and the width of each groove-shaped flow channel is 1.0mm to 1.5 mm.
Optionally, the serpentine flow channel regions of the hydrogen flow field and the air flow field are configured as zigzag-shaped flow channels formed by a plurality of wave plates arranged at intervals, the distance L between two adjacent turning points in the extending direction of the wave plates is 2mm to 3.3mm, the distance H between two adjacent turning points in the extending direction perpendicular to the wave plates is 1.2mm to 1.9mm, and the height of the wave plates is 0.1mm to 0.6 mm.
Optionally, the ratio D1 of the width of the wavy plates to the width of the zigzag-shaped flow channels is 0.9-2, and the air flow field is larger than the hydrogen flow field for the ratio D1.
Optionally, in the hydrogen flow field and the air flow field, a ratio D2 of a sum of areas of the first dot-shaped flow channel regions and the second dot-shaped flow channel regions to an area of the serpentine flow channel region is 0.13-0.27, wherein the air flow field is larger than the hydrogen flow field for a ratio D2.
According to yet another aspect of the present disclosure, there is also provided a fuel cell comprising a proton exchange membrane fuel cell bipolar plate according to the above.
Through the technical scheme, hydrogen on the front side of the anode plate is distributed and flows in the hydrogen flow field, air on the front side of the cathode plate is distributed and flows in the air flow field, the hydrogen and the air react through the proton exchange membrane, meanwhile, the back sides of the anode plate and the cathode plate are integrated together in a gluing and sealing mode, the sealing area comprises a cooling liquid flow field for distributing and flowing cooling liquid, and therefore heat generated in chemical reaction is taken away. The first point-shaped flow channel area is a distribution area, the first point-shaped flow channel area can distribute incoming gas or cooling liquid flow, the flow rate of the position far away from the inlet is adjusted, the flow rate of the gas or the cooling liquid of each flow channel in the winding flow channel area is uniformly distributed, the gas flowing speed is increased, the mass transfer is enhanced, and the concentration polarization is reduced. Meanwhile, the arrangement that the flow directions of the hydrogen flow field and the air flow field and the flow direction of the cooling liquid flow field form an included angle with each other can ensure that the inlet and outlet ends of the cooling liquid and the inlet and outlet ends of the hydrogen or the air are not in the same direction, effectively utilize the space of the bipolar plate and reduce the volume of the bipolar plate under the condition of ensuring the cooling effect.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
figure 1 is a perspective view of an anode plate according to one embodiment of the present disclosure.
Figure 2 is a schematic diagram of the front side of an anode plate according to one embodiment of the present disclosure.
Figure 3 is a schematic diagram of the structure of the opposite side of an anode plate according to one embodiment of the present disclosure.
Fig. 4 is a partial enlarged view of the hydrogen flow channel on the front surface of the anode plate based on fig. 2.
Fig. 5 is a perspective view of a cathode plate according to an embodiment of the present disclosure.
Fig. 6 is a schematic structural view of the front face of a cathode plate according to one embodiment of the present disclosure.
Fig. 7 is a schematic view of the reverse side of a cathode plate according to one embodiment of the present disclosure.
Fig. 8 is a partial enlarged view of the air flow passages on the front surface of the cathode plate based on fig. 6.
Fig. 9 is an enlarged view of the portion of the cathode plate opposite the cooling flow channels and the third spot flow field from fig. 7.
Description of the reference numerals
1-an anode plate; 2-a cathode plate; 10-a hydrogen flow field; 20-an air flow field; 30-a coolant flow field; 11. 21, 31-first dotted runner zone; 121, 221-wave plates; 321-groove-shaped flow channel; 12. 22, 32-serpentine flow-channel region; 122. 222-a zigzag flow channel; 322-elongated protrusions; 13. 23, 33-second punctiform flow field; 14-a hydrogen inlet; 15-hydrogen outlet; 24-an air inlet; 25-an air outlet; 34-a coolant inlet; 35-coolant outlet; 36-an overlap region; 4-cylindrical protrusion.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, the use of the terms of orientation such as "front" and "back" without any indication to the contrary means that the surface disposed outwardly with respect to the bipolar plate after assembly is the "front" and the surface for stacking is the "back". The use of the terms first, second, etc. are used for distinguishing between different components and not necessarily for describing a sequential or chronological order. Furthermore, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements, unless otherwise explained.
According to an embodiment of the present disclosure, there is provided a proton exchange membrane fuel cell bipolar plate, as shown in fig. 1 to 9, the bipolar plate includes an anode plate 1 and a cathode plate 2 arranged in a stack, a hydrogen flow field 10 is provided on a front surface of the anode plate 1, an air flow field 20 is provided on a front surface of the cathode plate 2, and a cooling liquid flow field 30 is provided between a back surface of the anode plate 1 and a back surface of the cathode plate 2, wherein the hydrogen flow field 10, the air flow field 20, and the cooling liquid flow field 30 may at least include: first dot-shaped flow channel regions 11, 21, 31 at the inlet end and serpentine flow channel regions 12, 22, 32 communicating with the first dot-shaped flow channel regions 11, 21, 31, the flow directions of the hydrogen flow field 10 and the air flow field 20 are arranged opposite to each other and at an angle to the flow direction of the coolant flow field 30.
Through the technical scheme, hydrogen on the front side of the anode plate 1 is distributed and flows in the hydrogen flow field 10, air on the front side of the cathode plate 2 is distributed and flows in the air flow field 20, meanwhile, the hydrogen and the air react through the proton exchange membrane, meanwhile, the back sides of the anode plate 1 and the cathode plate 2 are integrated together in a gluing and sealing mode, and the sealing area comprises the cooling liquid flow field 30 for distributing and flowing cooling liquid, so that heat generated in chemical reaction is taken away. The first point-shaped flow channel areas 11, 21 and 31 are distribution areas, the first point-shaped flow channel areas 11, 21 and 31 can distribute incoming gas or cooling liquid flow, adjust the flow rate at a position far away from an inlet, uniformly distribute the flow rate of the gas or the cooling liquid of each flow channel in the winding flow channel areas 12, 22 and 32, increase the gas flow speed, enhance mass transfer and reduce concentration polarization. Meanwhile, the flow directions of the hydrogen flow field 10 and the air flow field 20 and the flow direction of the cooling liquid flow field 30 form an included angle with each other, so that the inlet and outlet ends of the cooling liquid and the inlet and outlet ends of the hydrogen or the air are not in the same direction, the space of the bipolar plate can be effectively utilized, and the volume of the bipolar plate is reduced under the condition of ensuring the cooling effect.
It should be noted that, in one embodiment of the present disclosure, the flow directions of the hydrogen flow field 10 and the air flow field 20 are respectively perpendicular to the flow direction of the coolant flow field 30, and in other embodiments of the present disclosure, the angle of the flow directions may be any angle between 0 ° and 90 °, which is not limited in this disclosure. It is within the scope of the present disclosure that the bipolar plate may be made of graphite, metal, or other composite materials.
Further, as shown in fig. 2 and 6, the hydrogen inlet 14 and the hydrogen outlet 15 of the hydrogen flow field 10 and the air inlet 24 and the air outlet 25 of the air flow field 20 are respectively located at two ends of the corresponding pole plate and are arranged in a staggered manner. The staggered arrangement structure can make the gas fully distributed in the whole hydrogen flow field 10 or air flow field 20, so that the gas can be fully mixed when passing through the proton exchange membrane, and the chemical reaction speed is accelerated.
Further, as shown in fig. 2, 6, and 7, the hydrogen flow field 10, the air flow field 20, and the cooling liquid flow field 30 each further include a second dot-shaped flow channel region 13, 23, 33 at the outlet end, the second dot-shaped flow channel region 13, 23, 33 is communicated with the first dot-shaped flow channel region 11, 21, 31 through a serpentine flow channel region 12, 22, 32, and the second dot-shaped flow channel region 13, 23, 33 may converge the gas or the cooling liquid flowing out from the serpentine flow channel region 12, 22, 32 toward the corresponding hydrogen outlet 15, air outlet 25, or cooling liquid outlet 35.
Further, as shown in fig. 7, the inlet end of the coolant flow field 30 is provided with a plurality of coolant inlets 34, the outlet end of the coolant flow field 30 is provided with a plurality of coolant outlets 35, the first dotted flow channel region 31 and the second dotted flow channel region 33 of the coolant flow field 30 are respectively provided with a plurality of overlapping regions 36 extending into the meandering flow channel region 32, the plurality of overlapping regions 36 are respectively arranged near the coolant inlets 34 and the coolant outlets 35, the meandering flow channel region 32 can be formed in an irregular shape by setting the overlapping regions 36, and the setting can be matched with the long cylindrical protrusions and the irregular cylindrical protrusions in the first dotted flow field 31 mentioned later to ensure the uniformity of the coolant liquid inlet.
According to an embodiment of the present disclosure, as shown in fig. 2, 6 and 7, the first dotted flow channel regions 11, 21, 31 and the second dotted flow channel regions 13, 23, 33 are respectively configured as a plurality of rows of cylindrical protrusions 4 formed on the corresponding plate, and the plurality of cylindrical protrusions 4 of each adjacent row are alternately arranged and connected to form a flow field for distributing and collecting gas and coolant. In other embodiments, a conical protrusion, a spherical protrusion, etc. may also be included in the protection scope of the present disclosure.
According to an embodiment of the present disclosure, as shown in fig. 4 and 7, the serpentine flow channel region 32 of the coolant flow field 30 is configured as a groove-shaped flow channel 321 formed by a plurality of elongated protrusions 321 arranged at equal intervals and having different lengths, and the height of the elongated protrusions 322 may be in the range of 0.1mm to 0.6mm, and in this embodiment, the height of the elongated protrusions 322 is limited to the range of 0.2mm to 0.5 mm; the width of the elongated protrusion 322 can be in the range of 0.6mm-1.0mm, the width of the groove-shaped flow channel 321 can be in the range of 1.0mm-1.5mm, in this embodiment, the width of the elongated protrusion 322 is 0.8mm, and the width of the groove-shaped flow channel 321 is 1.2 mm. Here and as will be hereinafter referred to, the "width" refers to the dimension in a direction perpendicular to the flow of the flow field and the "height" refers to the dimension in a direction perpendicular to the plane of the plate.
It should be noted that, in the present embodiment, the cylindrical protrusions 4 in the first dotted-shaped flow channel region 31 of the cooling liquid flow field 30 further include long cylindrical protrusions and irregular cylindrical protrusions, and the long cylindrical protrusions and the irregular cylindrical protrusions are distributed near the cooling liquid inlet 34 and are matched with the groove-shaped flow channels 321 with different lengths, so that the cooling liquid is distributed more uniformly, and the flow difference between all the groove-shaped flow channels 321 in the meandering flow channel region 32 is ensured to be less than 5%.
According to one embodiment of the present disclosure, as shown in fig. 4 and 8, the serpentine channel regions 12 and 22 of the hydrogen flow field 10 and the air flow field 20 are configured as saw- toothed channels 122 and 222 formed by a plurality of wave plates 121 and 221 arranged at intervals, and compared with a straight channel, the saw-toothed channels increase the length of the channels, increase a certain pressure loss within a reasonable range, slow down the flow velocity of gas, make the electrochemical reaction more sufficient, and facilitate the discharge of water, which is a product of the hydrogen-oxygen electrochemical reaction, and prevent flooding. Meanwhile, the range of the distance L between two adjacent inflection points in the extending direction of the waved plate 121, 221 may be 2mm to 3.3mm, the range of the distance H between two adjacent inflection points in the extending direction perpendicular to the waved plate 121, 221 may be 1.2mm to 1.9mm, and the range of the height of the waved plate 121, 221 may be 0.1mm to 0.6 mm. The periodic structure can convert laminar flow of gas into complex turbulence with flow direction conversion, and causes certain disturbance to the gas flow of the low-oxygen region, thereby improving the oxygen content of the low-oxygen region, reducing the area of the low-oxygen region in the catalyst layer, promoting the mass transfer process of the gas, and simultaneously improving the uniformity of current distribution. In addition, it should be noted that, through a lot of calculations and experiments, in the present embodiment, the distance L is 2.6mm, the distance H is 1.5mm, and the height range of the wave plates 121 and 221 is 0.2mm to 0.5mm, which is favorable for the uniform distribution of the stack assembly force and the improvement of the performance.
Further, as shown in fig. 4 and 8, the ratio D1 of the width of the wavy plates 121, 221 to the width of the zigzag-shaped flow channels 122, 222 may range from 0.9 to 2, and for the ratio D1, the air flow field 20 is larger than the hydrogen flow field 10. Specifically, the ratio of the width of the wavy plate 121 to the width of the serrated runner 122 may be 7:6, and the ratio of the width of the wavy plate 221 to the width of the serrated runner 222 may be 8: 5. In this embodiment, the lengths and volumes of all the serrated runners 122, 222 are kept consistent, and meanwhile, the appropriate width ratio of the corrugated plates to the serrated runners can also facilitate the uniform distribution of the cell stack assembly force and the improvement of the performance.
According to an embodiment of the present disclosure, as shown in fig. 2 and 6, in the hydrogen flow field 10 and the air flow field 20, a ratio D2 of a sum of areas of the first dot flow channel regions 11, 21 and the second dot flow channel regions 13, 23 to an area of the serpentine flow channel regions 12, 22 may be 0.13-0.27, wherein, for the ratio D2, the air flow field 20 may be larger than the hydrogen flow field 10. Specifically, the ratio of the sum of the areas of the first dot flow channel region 11 and the second dot flow channel region 13 to the area of the meandering flow channel region 12 may be 3:17, the ratio of the sum of the areas of the first dot flow channel region 21 and the second dot flow channel region 23 to the area of the meandering flow channel region 22 may be 3:14, and an appropriate area ratio may ensure uniformity of the intake air while ensuring that the flow rate difference between all the zigzag flow channels 122 in the hydrogen flow field 10 or the flow rate difference between all the zigzag flow channels 222 in the air flow field 20 is less than 5%.
On the basis of the scheme, the present disclosure further provides a fuel cell, which includes the above bipolar plate for a proton exchange membrane fuel cell, and the fuel cell has all the beneficial effects of the above bipolar plate for a proton exchange membrane fuel cell, and details are not repeated here.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A bipolar plate for a proton exchange membrane fuel cell, comprising an anode plate (1) and a cathode plate (2) which are arranged in a stacked manner, wherein a hydrogen flow field (10) is arranged on the front surface of the anode plate (1), an air flow field (20) is arranged on the front surface of the cathode plate (2), and a cooling liquid flow field (30) is arranged between the back surface of the anode plate (1) and the back surface of the cathode plate (2), wherein the hydrogen flow field (10), the air flow field (20), and the cooling liquid flow field (30) respectively at least comprise: a first point-like flow channel region (11, 21, 31) at the inlet end and a meandering flow channel region (12, 22, 32) communicating with said first point-like flow channel region (11, 21, 31), the flow directions of said hydrogen flow field (10) and said air flow field (20) being arranged opposite and at an angle to each other with respect to the flow direction of said coolant flow field (30).
2. The pem fuel cell bipolar plate of claim 1, wherein the hydrogen inlet (14) and hydrogen outlet (15) of the hydrogen flow field (10), and the air inlet (24) and air outlet (25) of the air flow field (20) are respectively located at both ends of the respective plates and are arranged in a staggered manner.
3. The pem fuel cell bipolar plate of claim 1, wherein said hydrogen flow field (10), said air flow field (20), and said coolant flow field (30) each further comprise a second spot-shaped flow-channel region (13, 23, 33) at an outlet end, said second spot-shaped flow-channel region (13, 23, 33) being in communication with said first spot-shaped flow-channel region (11, 21, 31) through said serpentine flow-channel region (12, 22, 32).
4. The pem fuel cell bipolar plate of claim 3, wherein the inlet end of the coolant flow field (30) is provided with a plurality of coolant inlets (34), the outlet end of the coolant flow field (30) is provided with a plurality of coolant outlets (35), the first punctiform flow field (31) and the second punctiform flow field (33) of the coolant flow field (30) each have a plurality of overlapping regions (36) extending into the serpentine flow field (32), the plurality of overlapping regions (36) being arranged adjacent to the coolant inlets (34) and the coolant outlets (35), respectively.
5. The pem fuel cell bipolar plate of claim 3, wherein said first dotted runner regions (11, 21, 31) and said second dotted runner regions (13, 23, 33) are respectively configured as a plurality of rows of cylindrical protrusions (4) formed on the corresponding plate, the plurality of cylindrical protrusions (4) of each adjacent row being staggered.
6. The pem fuel cell bipolar plate of claim 1, wherein said serpentine flow-channel region (32) of said coolant flow field (30) is configured as a channel-shaped flow-channel (321) formed by a plurality of elongated protrusions (322) of unequal length and equally spaced, said elongated protrusions (322) having a height of 0.1mm-0.6mm, said elongated protrusions (322) having a width of 0.6mm-1.0mm, said channel-shaped flow-channel (322) having a width of 1.0mm-1.5 mm.
7. The pem fuel cell bipolar plate of claim 1, wherein said serpentine flow channel regions (12, 22) of said hydrogen flow field (10) and said air flow field (20) are configured as zigzag-shaped flow channels (122, 222) formed by a plurality of corrugated plates (121, 221) arranged at intervals, a distance L between two adjacent inflection points in an extending direction of said corrugated plates (121, 221) is 2mm-3.3mm, a distance H between two adjacent inflection points in an extending direction perpendicular to said corrugated plates (121, 221) is 1.2mm-1.9mm, and a height of said corrugated plates (121, 221) is 0.1mm-0.6 mm.
8. The pem fuel cell bipolar plate of claim 7, wherein the ratio D1 of the width of said corrugated plates (121, 221) to the width of said zigzag-shaped flow channels (122, 222) is 0.9-2, and for the ratio D1, said air flow field (20) is larger than said hydrogen flow field (10).
9. The pem fuel cell bipolar plate of claim 3, wherein the ratio D2 of the sum of the areas of said first dot-shaped flow-channel regions (11, 21) and said second dot-shaped flow-channel regions (13, 23) to the area of said serpentine flow-channel regions (12, 22) in said hydrogen flow field (10) and said air flow field (20) is 0.13-0.27, wherein said air flow field (20) is larger than said hydrogen flow field (10) for the ratio D2.
10. A fuel cell comprising the proton exchange membrane fuel cell bipolar plate of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110604730.2A CN113437326A (en) | 2021-05-31 | 2021-05-31 | Proton exchange membrane fuel cell bipolar plate and fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110604730.2A CN113437326A (en) | 2021-05-31 | 2021-05-31 | Proton exchange membrane fuel cell bipolar plate and fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113437326A true CN113437326A (en) | 2021-09-24 |
Family
ID=77804140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110604730.2A Pending CN113437326A (en) | 2021-05-31 | 2021-05-31 | Proton exchange membrane fuel cell bipolar plate and fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113437326A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207233866U (en) * | 2017-09-28 | 2018-04-13 | 陈莉 | A kind of dual polar plates of proton exchange membrane fuel cell structure and fuel cell pile |
| CN210897480U (en) * | 2019-08-07 | 2020-06-30 | 上海电气集团股份有限公司 | Metal bipolar plate of proton exchange membrane fuel cell |
| CN111509250A (en) * | 2020-03-30 | 2020-08-07 | 张家口市氢能科技有限公司 | Metal bipolar plate of proton exchange membrane fuel cell |
| CN113690458A (en) * | 2021-07-20 | 2021-11-23 | 浙江天能氢能源科技有限公司 | Proton exchange membrane fuel cell bipolar plate |
-
2021
- 2021-05-31 CN CN202110604730.2A patent/CN113437326A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207233866U (en) * | 2017-09-28 | 2018-04-13 | 陈莉 | A kind of dual polar plates of proton exchange membrane fuel cell structure and fuel cell pile |
| CN210897480U (en) * | 2019-08-07 | 2020-06-30 | 上海电气集团股份有限公司 | Metal bipolar plate of proton exchange membrane fuel cell |
| CN111509250A (en) * | 2020-03-30 | 2020-08-07 | 张家口市氢能科技有限公司 | Metal bipolar plate of proton exchange membrane fuel cell |
| CN113690458A (en) * | 2021-07-20 | 2021-11-23 | 浙江天能氢能源科技有限公司 | Proton exchange membrane fuel cell bipolar plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9905880B2 (en) | Fuel cell stack | |
| KR101693993B1 (en) | Bipolar plate for fuel cell | |
| JP2000231929A (en) | Fuel cell | |
| CN108155400B (en) | Fuel cell bipolar plate cooling flow field structure | |
| CN113745562B (en) | Cathode flow field plate, bipolar plate and PEMFC for PEMFC | |
| CN112909283A (en) | Proton exchange membrane fuel cell bipolar plate | |
| CN112038659A (en) | Flow field plate suitable for fuel cell and fuel cell | |
| CN113571730B (en) | Flow field structure of bipolar plate of proton exchange membrane fuel cell | |
| CN111509250A (en) | Metal bipolar plate of proton exchange membrane fuel cell | |
| CN113555580A (en) | Polar plate for fuel cell pile | |
| US20060003220A1 (en) | Fuel cell | |
| CN112038658A (en) | Fuel cell flow field plate with discontinuous grooves and fuel cell | |
| EP2023432B1 (en) | Fuel cell | |
| US8409767B2 (en) | Fuel cell | |
| CN113270607A (en) | Bipolar plate assembly for hydrogen-oxygen fuel cell | |
| CN116505011A (en) | Method for improving performance of proton exchange membrane fuel cell and multichannel serpentine flow field bipolar plate | |
| KR101534940B1 (en) | Bipolar plate for fuel cell and fuel cell using the same | |
| CN113437326A (en) | Proton exchange membrane fuel cell bipolar plate and fuel cell | |
| CN214152944U (en) | Fuel cell stack and cathode plate thereof | |
| CN212542497U (en) | Flow field plate suitable for fuel cell and fuel cell | |
| CN110137528B (en) | Negative plate, bipolar plate, fuel cell stack, power assembly and vehicle | |
| CN115036524A (en) | Bipolar plate and fuel cell | |
| CN210805927U (en) | Bipolar plate of fuel cell | |
| CN112086658A (en) | Fuel cell flow field plate and fuel cell | |
| CN212257565U (en) | Fuel cell flow field plate with discontinuous grooves and fuel cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20210924 Assignee: Beijing Yinuo Jinxin Technology Co.,Ltd. Assignor: Beijing hydrogen New Energy Technology Co.,Ltd. Contract record no.: X2021110000045 Denomination of invention: Proton exchange membrane fuel cell bipolar plate and fuel cell License type: Common License Record date: 20211101 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210924 |
|
| RJ01 | Rejection of invention patent application after publication |