CN221379429U - Fuel cell polar plate and fuel cell stack - Google Patents
Fuel cell polar plate and fuel cell stack Download PDFInfo
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- CN221379429U CN221379429U CN202322806758.1U CN202322806758U CN221379429U CN 221379429 U CN221379429 U CN 221379429U CN 202322806758 U CN202322806758 U CN 202322806758U CN 221379429 U CN221379429 U CN 221379429U
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- fuel cell
- fastener
- polar plate
- hydrogen
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- 239000000446 fuel Substances 0.000 title claims abstract description 61
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000001257 hydrogen Substances 0.000 claims abstract description 38
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 239000012528 membrane Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 238000007723 die pressing method Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 description 10
- 238000001746 injection moulding Methods 0.000 description 8
- 230000000149 penetrating effect Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- 238000003487 electrochemical reaction Methods 0.000 description 4
- 239000012495 reaction gas Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000012945 sealing adhesive Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical group OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 polyethylene naphthalate Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Fuel Cell (AREA)
Abstract
The application provides a fuel cell polar plate, which comprises at least two polar plate units connected with each other; each polar plate unit is arranged independently; the two pole plate units are connected through a separation area, a plurality of fastener perforation areas are arranged in the separation area, and each fastener perforation area is mutually independent; each polar plate unit comprises a polar plate body, an active area is arranged in the middle of the polar plate body, a hydrogen inlet and an air inlet are arranged at one end of the polar plate body, and a water inlet is arranged between the hydrogen inlet and the air inlet; an air outlet and a hydrogen outlet are arranged at the other end of the polar plate body, and a water outlet is arranged between the air outlet and the hydrogen outlet; the hydrogen inlet and the air outlet are arranged oppositely, and the air inlet and the hydrogen outlet are arranged oppositely. The application also provides a fuel cell stack. The application has simple structure, low cost, stability and reliability and can effectively improve the power of the electric pile.
Description
Technical Field
The utility model belongs to the technical field of fuel cells, and particularly relates to a fuel cell polar plate and a fuel cell stack.
Background
The perfluorosulfonic acid Proton Exchange Membrane (PEM) fuel cell is a power generation device for converting chemical energy stored in hydrogen into electric energy, and has the characteristics of high energy conversion rate, no pollution, low equipment operation noise and the like. At present, the fuel cell has realized preliminary commercial operation in fields such as communication base station power supply, unmanned aerial vehicle, fork truck, bus, sanitation car, heavy truck, etc., and the power demand of this kind of application scene is generally at 1kW-130kW.
With the development of various technologies of the fuel cell stack, the application scene is wider and wider, and the fuel cell has unique advantages for heavy and medium-sized power application, especially for the shipping of heavy loads and the application field of large-scale fixed power stations, and can play an important role in high-efficiency emission reduction; the power of the fuel cell for the application is generally more than 200kW, the requirements on the power of a galvanic pile are higher and higher, and meanwhile, the requirements on the performance of parts (membrane electrodes, bipolar plates and the like) and the structural design are higher, and the technical barriers are higher.
The effective area and structural design of the high-power fuel cell stack are critical, and particularly in the aspect of polar plates, the high-power fuel cell stack has the functions of providing a flow channel for a cooling field, isolating air and hydrogen, conducting current, conducting structural support and a gas-surface flow field. At present, the active area of the main current polar plate is smaller than 300cm 2, if the number of the galvanic pile needs to be increased in order to achieve higher power, the consistency risk is greatly increased, and the industrial application is not facilitated.
In order to realize high-power output, a mode of connecting a plurality of fuel cells in parallel is mainly adopted at the present stage, but the problem of uneven gas distribution is easily caused, the system volume is increased, and the space requirement of part of application scenes is not met. The single cell stacks generally rely on increasing the number of stack sheets to achieve high power, greatly increasing the risk of inconsistent uniformity. Moreover, if the single cell stack realizes high power by increasing the active area and the polar plate area, the situation of uneven flow field distribution can also occur.
Disclosure of utility model
The embodiment of the utility model provides a fuel cell polar plate and a fuel cell stack, which aim to solve the problems of how to realize high power of a single cell stack and the like.
To solve the above problems, a primary object of the present utility model is to provide a fuel cell plate comprising at least two plate units connected; each polar plate unit is arranged independently; the two pole plate units are connected through a separation area, a plurality of fastener perforation areas are arranged in the separation area, and each fastener perforation area is mutually independent;
Each polar plate unit comprises a polar plate body, an active area is arranged in the middle of the polar plate body, a hydrogen inlet and an air inlet are arranged at one end of the polar plate body, and a water inlet is arranged between the hydrogen inlet and the air inlet; an air outlet and a hydrogen outlet are arranged at the other end of the polar plate body, and a water outlet is arranged between the air outlet and the hydrogen outlet; the hydrogen inlet and the air outlet are arranged oppositely, and the air inlet and the hydrogen outlet are arranged oppositely.
By arranging the active areas on each polar plate unit, the polar plate adopts a double-active-area design, has larger active-area surface area, can effectively increase the area of electrochemical reaction, and further effectively improves the power of a galvanic pile; compared with multi-stack parallel connection, the polar plate of the application can lead the volume of the electric stack to be smaller, the structure to be more compact and the volume power density to be higher; and the two active area flow fields are mutually independent, so that the uniformity of gas distribution can be ensured.
As a preferred embodiment, each of the fastener penetrating regions is disposed parallel to each other; and a plurality of fastener perforation areas are arranged in the same plane along the long side direction of the polar plate unit. In this way, the fastening arrangement of the galvanic pile is facilitated.
As a preferred embodiment, two connected pole plate units are integrally formed; the two pole plate units comprise a first pole plate unit and a second pole plate unit; the hydrogen inlet of the first polar plate unit is arranged close to the air inlet of the second polar plate unit; the air outlet of the first polar plate unit is arranged close to the hydrogen outlet of the second polar plate unit.
As a preferred embodiment, the edges of the hydrogen inlet, the water inlet, the air inlet, the water outlet, the hydrogen outlet and the air outlet are all provided with sealant. The sealing of the fuel cell polar plate can be realized by adopting injection molding of the membrane electrode frame or injection molding of the polar plate sealing adhesive tape, so that the fuel cell polar plate has better sealing property, can avoid the phenomenon of partial warping of a large-area polar plate, and has higher compatibility.
As a preferred embodiment, the fuel cell plate is one of an engraved graphite plate, a die plate, stainless steel or a titanium-based metal plate. In general, a stamping plate of the fuel cell is obtained by stamping in a large area and then cutting; the fuel cell polar plate can be directly prepared without cutting, and the cost can be saved well.
Another object of the present utility model is to provide a fuel cell stack including a first end plate, a first current collecting plate, a stack body, a second current collecting plate, and a second end plate; the first current collecting plate and the second current collecting plate are respectively abutted to two ends of the pile body; the first end plate is abutted against the side surface, far away from the pile body, of the first current collecting plate; the second end plate is abutted to the side surface, away from the pile body, of the second current collector;
The pile body comprises a plurality of battery cells connected in series; the battery unit comprises two bipolar plates and a membrane electrode arranged between the two bipolar plates, wherein the bipolar plates are the fuel cell plates.
As a preferred embodiment, the first end plate, the first current collecting plate, the second end plate and the membrane electrode are provided with perforations adapted to the fastener perforation areas. The adaptation means that the size, shape, setting position and setting number of the through holes are all matched with the perforated area of the fastener.
As a preferred embodiment, the fuel cell stack is further provided with an internal fastener penetrating through the through hole of the first end plate, the through hole of the first current collecting plate, the fastener penetrating area of the stack body, the through hole of the second current collecting plate and the through hole of the second end plate; and one end of the internal fastener is fixed on the first end plate, and the other end is fixed on the second end plate. Through setting up inside fastener, can effectively stabilize the combination of each part of electric pile, the equipment is convenient, stable in structure improves the compactness between each subassembly.
As a preferred embodiment, the internal fastener is adapted to the fastener penetration area; the surface of the internal fastener is provided with a first insulating layer. In this way, short-circuiting between the plates caused by the internal fasteners can be effectively prevented.
As a preferred embodiment, the fuel cell stack is further provided with a plurality of external fasteners, and the external fasteners are circumferentially arranged on the outer side of the stack body; and one end of the external fastener is fixed on the first end plate, and the other end of the external fastener is fixed on the second end plate. Through setting up external fastener, can further effectively stabilize the combination of each part of electric pile, the equipment is convenient, stable in structure improves the compactness between each subassembly.
As a preferable embodiment, the plurality of external fasteners are uniformly arranged on the outer side of the pile body; the surface of each external fastener is provided with a second insulating layer. In this way, short-circuiting between the plates caused by the external fastener can be effectively prevented.
As a preferred embodiment, a sealing ring is arranged between the bipolar plate and the membrane electrode. In the application, the sealing ring can be attached to the surface of the membrane electrode frame by adopting an injection molding process; the sealing ring can also be attached in a sealing glue groove of the bipolar plate by adopting a dispensing, screen printing or injection molding process. The sealing ring can be a silicon rubber sealing ring or a fluororubber sealing ring.
As a preferred embodiment, the first end plate and the second end plate are respectively arranged in a matching way with the pile body. In the application, the first end plate is provided with an inlet and an outlet of a hydrogen path, an inlet and an outlet of an air path and an inlet and an outlet of a cooling path which are matched with the fuel cell polar plate, a main pipeline can be respectively connected with the inlet and the outlet of the first end plate by utilizing a manifold design, and reaction gas and cooling liquid can enter the electric pile body through the inlet and the outlet of the first end plate for uniform distribution.
Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the fuel cell polar plate is arranged as two independent polar plate units, and the polar plate units are connected through the separation area, so that the active area (namely the electrochemical reaction area) of the polar plate can be greatly increased, and the uniformity of the distribution of the reaction gas is effectively improved, thereby effectively improving the output power of the single cell pile. Compared with a multi-stack parallel structure, the pile structure of the utility model has smaller volume, more compact structure and higher volume power density. The utility model can effectively ensure the close fit inside the pile body by combining the external fastener and the internal fastener, so that the distribution of assembly force is more uniform and reasonable, the stability of the structure is effectively ensured, and the structure has better shock resistance. The utility model has simple structure, low cost, good processability, economy, practicability, stability and reliability, and the polar plate flow field can ensure uniform internal fluid distribution, thereby effectively improving the performance of the fuel cell.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a fuel cell plate according to an embodiment of the present application;
fig. 2 is a schematic structural view of a fuel cell stack according to another embodiment of the present application;
FIG. 3 is a schematic view of an exploded structure of the fuel cell stack of FIG. 2;
FIG. 4 is a schematic view of the structure of the membrane electrode of the cell stack body of FIG. 3;
FIG. 5 is a schematic view of the external fastener of FIG. 3;
Fig. 6 is a schematic view of the internal fastener of fig. 3.
Detailed Description
The following description of the embodiments of the present utility model will be made 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, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood that when an element is referred to as being "fixed" 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.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. 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.
Specifically, as shown in fig. 1, an embodiment of the present utility model proposes a fuel cell plate, including at least two plate units 10 connected to each other; each of the plate units 10 is independently provided; the two pole plate units 10 are connected through a separation area 20, a plurality of fastener perforation areas 21 are arranged in the separation area 20, and each fastener perforation area 21 is arranged independently;
each polar plate unit 10 comprises a polar plate body 11, an active area 111 is arranged in the middle of the polar plate body 11, a hydrogen inlet 112 and an air inlet 113 are arranged at one end of the polar plate body 11, and a water inlet 114 is arranged between the hydrogen inlet 112 and the air inlet 113; an air outlet 115 and a hydrogen outlet 116 are arranged at the other end of the polar plate body 11, and a water outlet 117 is arranged between the air outlet 115 and the hydrogen outlet 116; the hydrogen gas inlet 112 and the air outlet 115 are disposed opposite to each other, and the air inlet 113 is disposed opposite to the hydrogen gas outlet 116.
By arranging the active area 111 on each polar plate unit 10, the polar plate adopts a double-active-area design, has larger active-area surface area, can effectively increase the area of electrochemical reaction, and further effectively improves the power of a galvanic pile; compared with multi-stack parallel connection, the polar plate of the application can lead the volume of the electric stack to be smaller, the structure to be more compact and the volume power density to be higher; and the two active area flow fields are mutually independent, so that the uniformity of gas distribution can be ensured.
As a preferred embodiment, each of the fastener penetrating regions 21 is disposed parallel to each other; the plurality of fastener penetrating regions 21 are disposed in the same plane along the longitudinal direction of the plate unit 10. In this way, the fastening arrangement of the galvanic pile is facilitated. Specifically, in the present embodiment, two fastener penetrating regions 21 are provided, and two fastener penetrating regions 21 are disposed parallel to each other.
As a preferred embodiment, two connected pole plate units 10 are integrally formed; the two pole plate units 10 include a first pole plate unit 10A and a second pole plate unit 10B; the hydrogen inlet 112 of the first plate unit 10A is disposed near the air inlet 113 of the second plate unit 10B; the air outlet 115 of the first plate unit 10A is disposed near the hydrogen outlet 116 of the second plate unit 10B.
As a preferred embodiment, the edges of the hydrogen inlet 112, the water inlet 114, the air inlet 113, the water outlet 117, the hydrogen outlet 116 and the air outlet 115 are provided with sealant (not shown). The sealing of the fuel cell polar plate can be realized by adopting injection molding of the membrane electrode frame or injection molding of the polar plate sealing adhesive tape, so that the fuel cell polar plate has better sealing property, can avoid the phenomenon of partial warping of a large-area polar plate, and has higher compatibility.
As a preferred embodiment, the fuel cell plate is one of an engraved graphite plate, a die plate, stainless steel or a titanium-based metal plate according to the actual use requirement. In general, a stamping plate of the fuel cell is obtained by stamping in a large area and then cutting; the fuel cell polar plate can be directly prepared without cutting, and the cost can be saved well.
As shown in fig. 2 to 6, another embodiment of the present utility model provides a fuel cell stack including a first end plate 100, a first current collecting plate 200, a stack body 300, a second current collecting plate 400, and a second end plate 500; the first current collecting plate 200 and the second current collecting plate 400 are respectively abutted to two ends of the pile body 300; the first end plate 100 is abutted against the side surface of the first current collecting plate 200 away from the stack body 300; the second end plate 500 abuts on a side of the second current collector 400 away from the stack body 300;
The stack body 300 includes a plurality of battery cells (not shown) connected in series; the battery cell comprises two bipolar plates and a membrane electrode 301 arranged between the two bipolar plates, wherein the bipolar plates are the fuel cell plates.
In the embodiment of the application, the membrane electrode adopts a common membrane electrode structure, and the frame material of the membrane electrode can be prepared from one of PEN (polyethylene naphthalate), PI (polyimide), PPS (polyphenylene sulfide) or PEEK (polyether ether ketone).
As a preferred embodiment, the first end plate 100, the first current collecting plate 200, the second current collecting plate 400, the second end plate 500 and the membrane electrode 301 are provided with perforations 600 adapted to the fastener perforation regions 21. The adaptation means that the size, shape, setting position and setting number of the through holes are all matched with the perforated area of the fastener.
As a preferred embodiment, the fuel cell stack is further provided with an internal fastener 700, and the internal fastener 700 is inserted through the hole of the first end plate 100, the hole of the first current collecting plate 200, the fastener hole region 21 of the stack body 300, the hole of the second current collecting plate 400, and the hole of the second end plate 500; and one end of the internal fastener 700 is fixed to the first end plate 100 and the other end is fixed to the second end plate 500. Through setting up interior fastener 700, can effectively stabilize the combination of each part of electric pile, the equipment is convenient, stable in structure improves the compactness between each subassembly.
As a preferred embodiment, the internal fasteners 700 are adapted to the fastener penetration areas 21; the surface of the internal fastener 700 is provided with a first insulating layer 701. In this way, short-circuiting between the plates caused by the internal fasteners can be effectively prevented.
As a preferred embodiment, the fuel cell stack is further provided with a plurality of external fasteners 800, and the plurality of external fasteners 800 are circumferentially arranged at the outer side of the stack body 300; and one end of the external fastening member 800 is fixed to the first end plate 100 and the other end is fixed to the second end plate 500. Through setting up external fastener 800, can further effectively stabilize the combination of each part of electric pile, the equipment is convenient, stable in structure improves the compactness between each subassembly.
As a preferred embodiment, the plurality of external fasteners 800 are uniformly disposed at the outer side of the stack body 300; the surface of each of the external fasteners 800 is provided with a second insulating layer 801. In this way, short-circuiting between the plates caused by the external fastener can be effectively prevented.
As a preferred embodiment, a sealing ring is arranged between the bipolar plate and the membrane electrode. In the application, the sealing ring can be attached to the surface of the membrane electrode frame by adopting an injection molding process; the sealing ring can also be attached in a sealing glue groove of the bipolar plate by adopting a dispensing, screen printing or injection molding process. The sealing ring can be a silicon rubber sealing ring or a fluororubber sealing ring.
As a preferred embodiment, the first end plate 100 and the second end plate 500 are respectively adapted to the pile body 300. In the application, the first end plate is provided with an inlet and an outlet of a hydrogen path, an inlet and an outlet of an air path and an inlet and an outlet of a cooling path which are matched with the fuel cell polar plate, a main pipeline can be respectively connected with the inlet and the outlet of the first end plate by utilizing a manifold design, and reaction gas and cooling liquid can enter the electric pile body through the inlet and the outlet of the first end plate for uniform distribution.
According to the application, the fuel cell polar plate is arranged as two independent polar plate units, and the polar plate units are connected through the separation area, so that the active area (namely the electrochemical reaction area) of the polar plate can be greatly increased, and the uniformity of the distribution of the reaction gas is effectively improved, thereby effectively improving the output power of the single cell pile. Compared with a multi-stack parallel structure, the pile structure of the application has smaller volume, more compact structure and higher volume power density. The application can effectively ensure the close fit inside the pile body by combining the external fastener and the internal fastener, so that the distribution of assembly force is more uniform and reasonable, the stability of the structure is effectively ensured, and the structure has better shock resistance. The application has simple structure, low cost, good processability, economy, practicability, stability and reliability, and the polar plate flow field can ensure uniform internal fluid distribution, thereby effectively improving the performance of the fuel cell.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. A fuel cell plate comprising at least two connected plate units; each polar plate unit is arranged independently; the two pole plate units are connected through a separation area, a plurality of fastener perforation areas are arranged in the separation area, and each fastener perforation area is mutually independent;
Each polar plate unit comprises a polar plate body, an active area is arranged in the middle of the polar plate body, a hydrogen inlet and an air inlet are arranged at one end of the polar plate body, and a water inlet is arranged between the hydrogen inlet and the air inlet; an air outlet and a hydrogen outlet are arranged at the other end of the polar plate body, and a water outlet is arranged between the air outlet and the hydrogen outlet; the hydrogen inlet and the air outlet are arranged oppositely, and the air inlet and the hydrogen outlet are arranged oppositely.
2. The fuel cell plate of claim 1, wherein each of the fastener perforated regions are disposed parallel to one another; and a plurality of fastener perforation areas are arranged in the same plane along the long side direction of the polar plate unit.
3. The fuel cell plate of claim 1, wherein two connected plate units are integrally formed; the two pole plate units comprise a first pole plate unit and a second pole plate unit; the hydrogen inlet of the first polar plate unit is arranged close to the air inlet of the second polar plate unit; the air outlet of the first polar plate unit is arranged close to the hydrogen outlet of the second polar plate unit.
4. The fuel cell plate of claim 3, wherein edges of the hydrogen inlet, the water inlet, the air inlet, the water outlet, the hydrogen outlet, and the air outlet are provided with a sealant;
The fuel cell polar plate is one of an engraving graphite plate, a die pressing plate, stainless steel or a titanium-based metal plate.
5. A fuel cell stack comprising a first end plate, a first current collector plate, a stack body, a second current collector plate, and a second end plate; the first current collecting plate and the second current collecting plate are respectively abutted to two ends of the pile body; the first end plate is abutted against the side surface, far away from the pile body, of the first current collecting plate; the second end plate is abutted against the side surface, far away from the pile body, of the second current collecting plate;
The pile body comprises a plurality of battery cells connected in series; the battery cell comprises two bipolar plates and a membrane electrode arranged between the two bipolar plates, wherein the bipolar plates are fuel cell plates as claimed in any one of claims 1-4.
6. The fuel cell stack according to claim 5, wherein the first end plate, the first current collector plate, the second end plate, and the membrane electrode are each provided with perforations adapted to the fastener perforation areas.
7. The fuel cell stack according to claim 6, further comprising an internal fastener disposed thereon, the internal fastener passing through the aperture of the first end plate, the aperture of the first current collector plate, the fastener aperture region of the stack body, the aperture of the second current collector plate, and the aperture of the second end plate; and one end of the internal fastener is fixed on the first end plate, and the other end is fixed on the second end plate.
8. The fuel cell stack according to claim 7, wherein the internal fasteners are adapted to the fastener perforated regions; the surface of the internal fastener is provided with a first insulating layer.
9. The fuel cell stack according to claim 5, wherein a plurality of external fasteners are further provided on the fuel cell stack, the plurality of external fasteners being circumferentially provided on an outer side of the stack body; and one end of the external fastener is fixed on the first end plate, and the other end of the external fastener is fixed on the second end plate.
10. The fuel cell stack according to claim 9, wherein a plurality of the external fasteners are uniformly provided on the outside of the stack body; the surface of each external fastener is provided with a second insulating layer;
And a sealing ring is arranged between the bipolar plate and the membrane electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322806758.1U CN221379429U (en) | 2023-10-19 | 2023-10-19 | Fuel cell polar plate and fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322806758.1U CN221379429U (en) | 2023-10-19 | 2023-10-19 | Fuel cell polar plate and fuel cell stack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221379429U true CN221379429U (en) | 2024-07-19 |
Family
ID=91858247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322806758.1U Active CN221379429U (en) | 2023-10-19 | 2023-10-19 | Fuel cell polar plate and fuel cell stack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221379429U (en) |
-
2023
- 2023-10-19 CN CN202322806758.1U patent/CN221379429U/en active Active
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