CN218101325U - Metal bipolar plate and fuel cell stack - Google Patents
Metal bipolar plate and fuel cell stack Download PDFInfo
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- CN218101325U CN218101325U CN202221579468.7U CN202221579468U CN218101325U CN 218101325 U CN218101325 U CN 218101325U CN 202221579468 U CN202221579468 U CN 202221579468U CN 218101325 U CN218101325 U CN 218101325U
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- 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
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Abstract
The utility model discloses a metal bipolar plate and a fuel cell stack, which comprises a first plate body, wherein the first plate body comprises a first surface and a second surface which are oppositely arranged, the second surface is provided with a first ridge part and a first groove part which are alternately arranged in sequence, and the first surface is provided with a first flow passage; the second plate body comprises a third surface and a fourth surface which are oppositely arranged, the third surface is provided with second ridge parts and second groove parts which are alternately arranged in sequence, and the fourth surface is provided with a second flow channel; the first ridge part is arranged in the second groove part, and a first gap is formed between the outer side surface of the first ridge part and the inner side surface of the second groove part; the second ridge is arranged in the first groove, and a second gap is formed between the outer side surface of the second ridge and the inner side surface of the first groove. Through the utility model discloses realize reducing the whole thickness of fuel cell pile to improve power density.
Description
Technical Field
The utility model relates to a fuel cell field, in particular to metal bipolar plate and fuel cell stack.
Background
A fuel cell is an electrochemical reaction device capable of converting chemical energy into electric energy, and is not limited by carnot cycle, and theoretically, has an energy conversion efficiency higher than that of an internal combustion engine (up to 80% or more, generally not lower than 50%), and has many advantages such as zero emission and no mechanical noise, and thus is favored in military and civil fields. A conventional metal bipolar plate is shown in fig. 1, in which a first plate body is aligned with a ridge portion side of a second plate body, and a first plate body is aligned with a groove portion side of the second plate body. As a result, the overall size of the fuel cell stack is relatively thick, and the power density is relatively low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a metal bipolar plate and fuel cell pile aims at realizing reducing the whole thickness of fuel cell pile to improve its power density.
In order to achieve the above object, the present invention provides a metal bipolar plate for a fuel cell stack, including:
the first plate body comprises a first surface and a second surface which are oppositely arranged, the second surface is provided with a first ridge part and a first groove part which are alternately arranged in sequence, the first surface is provided with a first flow passage, and the first flow passage is embedded in the first ridge part;
the second plate body comprises a third surface and a fourth surface which are oppositely arranged, the third surface is provided with second ridge parts and second groove parts which are alternately arranged in sequence, the fourth surface is provided with a second flow channel, and the second flow channel is embedded in the second ridge parts;
the first ridge part is arranged in the second groove part, the outer top surface of the first ridge part is fixedly attached to the inner bottom surface of the second groove part, and a first gap is formed between the outer side surface of the first ridge part and the inner side surface of the second groove part; the second ridge is arranged in the first groove, the outer top surface of the second ridge is fixedly attached to the inner bottom surface of the first groove, a second gap is formed between the outer side surface of the second ridge and the inner side surface of the first groove, and the first gap and the second gap form a third flow channel.
Optionally, the first plate body and the second plate body have the same shape and structure.
Optionally, the ridge width of the first ridge/the second ridge is twice the groove width of the first groove/the second groove.
Optionally, the first gap is on opposite sides of the first ridge and the second gap is on opposite sides of the second ridge.
Optionally, the first/second flow passages comprise one or more combinations of straight flow passage designs, serpentine flow passage designs, or serpentine flow passage designs.
Optionally, the first plate body is an anode plate, and the first flow channel is an anode flow channel for flowing an anode working gas; and the second plate body is a cathode plate, and the second flow channel is a cathode flow channel for flowing a cathode working gas.
Optionally, the first plate body is a cathode plate, and the first flow channel is a cathode flow channel for flowing a cathode working gas; and the second plate body is an anode plate, and the second flow channel is an anode flow channel for flowing an anode working gas.
Optionally, the third flow passage is a cooling liquid flow passage for flowing a cooling liquid.
In order to achieve the above object, the present invention further provides a fuel cell stack including the metal bipolar plate.
Optionally, the metal bipolar plates and the membrane electrode assemblies are stacked in a staggered manner, and the first face and the fourth face are respectively attached to the membrane electrode assemblies.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a set up first plate body and second plate body are crisscross, make it correspond the position and be separated by half cycle, place in the second slot part of second plate body in the first ridge of first plate body promptly, place in the second ridge of second plate body in the first slot part of first plate body. Therefore, the purpose of reducing the whole thickness of the fuel cell stack is achieved, and the power density of the fuel cell stack is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a metal bipolar plate in the prior art;
fig. 2 is a schematic structural view of a first plate and a second plate in an embodiment of the metal bipolar plate of the present invention;
FIG. 3 is a schematic structural diagram of one embodiment of a metal bipolar plate of the present invention;
the names of the components identified in the figures are as follows:
| reference numerals | Name(s) | Reference numerals | Name (R) |
| 1 | |
101 | |
| 102 | |
103 | First ridge part |
| 104 | A |
2 | |
| 201 | |
202 | |
| 203 | |
204 | The |
| 3 | |
4 | |
| 5 | |
6 | |
| 7 | Third flow channel |
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it is to be understood that only some, but not all embodiments of the present invention are described. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment discloses a metal bipolar plate, which is applied to a fuel cell stack, and referring to fig. 1-3, the metal bipolar plate comprises a first plate body 1, wherein the first plate body 1 comprises a first surface 101 and a second surface 102 which are oppositely arranged, the second surface 102 is provided with a first ridge 103 and a first groove 104 which are alternately arranged in sequence, the first surface 101 is provided with a first flow channel 3, and the first flow channel 3 is embedded in the first ridge 103; the second plate body 2 comprises a third surface 201 and a fourth surface 202 which are oppositely arranged, the third surface 201 is provided with second ridge portions 203 and second groove portions 204 which are alternately arranged in sequence, the fourth surface 202 is provided with a second flow channel 4, and the second flow channel 4 is embedded in the second ridge portions 203; the first ridge 103 is arranged in the second groove 204, the outer top surface of the first ridge 103 is fixedly attached to the inner bottom surface of the second groove 204, and a first gap 5 is arranged between the outer side surface of the first ridge 103 and the inner side surface of the second groove 204; the second ridge portion 203 is built in the first groove portion 104, an outer top surface of the second ridge portion 203 is bonded and fixed to an inner bottom surface of the first groove portion 104, a second gap 6 is provided between an outer side surface of the second ridge portion 203 and an inner side surface of the first groove portion 104, and the first gap 5 and the second gap 6 form a third flow channel 7. It should be noted that, since the first ridge 103, the first groove 104, the second ridge 203 and the second groove 204 are all referred to as the first plate 1 and the second plate, when the first plate 1 and the second plate 2 are combined, the overlapping region of the first gap 5 and the second gap 6 will appear, and it should be understood that these regions are the same region.
In the present embodiment, the first plate 1 and the second plate 2 are alternately arranged, so that the corresponding positions are separated by a half cycle, that is, the first ridge 103 of the first plate 1 is embedded in the second groove 204 of the second plate 2, and the second ridge 203 of the second plate 2 is embedded in the first groove 104 of the first plate 1. Thereby achieving the purpose of reducing the whole thickness of the fuel cell stack and improving the power density.
Meanwhile, for the traditional metal bipolar plate design mode, because the joint position of the first plate body 1 and the second plate body 2 is positioned on the ridge side of the first plate body and the second plate body, the adjustable dislocation space is less, and the precision requirement for the assembly welding of the first plate body 1 and the second plate body 2 is higher. And the laminating position of this embodiment is located the junction of ridge and slot part, and its adjustable dislocation space is relatively more, and precision requirement when greatly reduced the assembly welding is favorable to improving the yields.
Specifically, the first plate body 1 is an anode plate, and the first flow channel 3 is an anode flow channel for flowing an anode working gas; and the second plate body 2 is a cathode plate, and the second flow channel 4 is a cathode flow channel for flowing a cathode working gas; or, the first plate body 1 is a cathode plate, and the first flow channel 3 is a cathode flow channel for flowing cathode working gas; and the second plate body 2 is an anode plate and the second flow channels 4 are anode flow channels for flowing an anode working gas. In this embodiment, the anode working gas is hydrogen, and the cathode working gas is air or oxygen.
Specifically, the third flow channel 7 is a cooling liquid flow channel for flowing a cooling liquid.
As a preferable solution of the above embodiment, the first plate body 1 and the second plate body 2 have the same shape and structure. So set up, make it utilize same forming die can accomplish the contour machining of first plate body 1 and second plate body 2, need not to increase extra shaping process for the production beat saves the die sinking expense.
Specifically, the ridge width of the first ridge portion 103/the second ridge portion 203 is twice the groove width of the first groove portion 104/the second groove portion 204. In this way, by specifying the specific numerical relationship between the ridge width and the groove width, it is ensured that when the first ridge portion 103/the second ridge portion 203 are built in the second groove portion 204/the first groove portion 104, the first gap 5/the second gap 6 exists between the first ridge portion 103/the second ridge portion 203 and the second groove portion 204/the first groove portion 104.
Specifically, the first gap 5 is located on opposite sides of the first ridge 103, and the second gap 6 is located on opposite sides of the second ridge 203. Due to the arrangement, a first gap 5/a second gap 6 is ensured to be arranged between the adjacent first flow channel 3 and the second flow channel 4, on one hand, a sufficient interval is ensured to exist between the first flow channel 3 and the second flow channel 4, and the situation that when the first plate body 1 or the second plate body 2 is damaged, working gas in the first flow channel 3 and the second flow channel 4 are communicated with each other to cause safety accidents is avoided; on the other hand, the first flow channel 3 and the second flow channel 4 can be sufficiently cooled by the coolant in the first gap 5/the second gap 6.
Specifically, the first ridge 103 is located at the midpoint of the second groove 204, and the second ridge 203 is located at the midpoint of the first groove 104. The arrangement ensures that the cross-sectional areas of the first gap 5/the second gap 6 on the opposite sides are equal, and ensures uniform cooling during cooling.
As a preferable aspect of the above embodiment, the first flow channel 3/the second flow channel 4 includes one or a combination of more of a straight flow channel design, a serpentine flow channel design, or a serpentine flow channel design. With such a configuration, the specific shape of the first flow channel 3/the second flow channel 4 is not limited, so that the flow channel can be self-planned according to the actual situation, thereby improving the flexibility. It should be noted that the specific shape of the first/ second flow passages 3, 4 as contemplated by those skilled in the art after understanding the design scheme of the present application shall also fall within the scope of the present application.
The embodiment also discloses a fuel cell stack which comprises the metal bipolar plate. In this way, the metal bipolar plate is applied to a fuel cell stack, so that the fuel cell stack has the first plate body 1 and the second plate body 2 arranged alternately, and the corresponding positions of the first plate body 1 and the second plate body 2 are separated by a half cycle, that is, the first ridge portion 103 of the first plate body 1 is arranged in the second groove portion 204 of the second plate body 2, and the second ridge portion 203 of the second plate body 2 is arranged in the first groove portion 104 of the first plate body 1. Therefore, the purpose of reducing the overall thickness of the fuel cell stack is achieved, and the development concept of product miniaturization of enterprises is met.
Specifically, the metal bipolar plate structure further comprises a plurality of membrane electrode assemblies (not shown in the figure), the metal bipolar plates and the membrane electrode assemblies are stacked in a staggered manner, and the first face 101 and the fourth face 202 are respectively attached to the membrane electrode assemblies. The arrangement is such that the first flow channels 3/second flow channels 4 on the first face 101/fourth face 202 can perform sufficient contact reaction with the membrane electrode assembly.
It should be noted that other contents of the metal bipolar plate and the fuel cell stack disclosed in the present invention are prior art and are not described herein again.
In addition, it should be noted that, if directional indications (such as up, down, left, right, front, and back \8230;) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are correspondingly changed.
Furthermore, it should be noted that the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Above only be the utility model discloses an optional embodiment, and not consequently the restriction the utility model discloses a patent range all is in the utility model discloses direct/indirect application all is included in other relevant technical field the utility model discloses a within range is protected to the patent.
Claims (10)
1. A metallic bipolar plate for use in a fuel cell stack, comprising:
the first plate body comprises a first surface and a second surface which are oppositely arranged, the second surface is provided with a first ridge part and a first groove part which are alternately arranged in sequence, the first surface is provided with a first flow channel, and the first flow channel is embedded in the first ridge part;
the second plate body comprises a third surface and a fourth surface which are oppositely arranged, the third surface is provided with second ridge parts and second groove parts which are alternately arranged in sequence, the fourth surface is provided with a second flow channel, and the second flow channel is embedded in the second ridge parts;
the first ridge part is arranged in the second groove part, the outer top surface of the first ridge part is fixedly attached to the inner bottom surface of the second groove part, and a first gap is formed between the outer side surface of the first ridge part and the inner side surface of the second groove part; the second ridge is arranged in the first groove part, the outer top surface of the second ridge is attached and fixed with the inner bottom surface of the first groove part, a second gap is arranged between the outer side surface of the second ridge and the inner side surface of the first groove part, and a third flow channel is formed by the first gap and the second gap.
2. The metallic bipolar plate of claim 1, wherein: the first plate body and the second plate body are identical in shape and structure.
3. The metallic bipolar plate of claim 2, wherein: the ridge width of the first ridge/the second ridge is twice the groove width of the first groove/the second groove.
4. Metallic bipolar plate as claimed in claim 1, wherein: the first gap is on opposite sides of the first ridge and the second gap is on opposite sides of the second ridge.
5. Metallic bipolar plate as claimed in claim 1, wherein: the first/second flow passages comprise one or more combinations of straight flow passage designs, serpentine flow passage designs, or serpentine flow passage designs.
6. The metallic bipolar plate of claim 1, wherein: the first plate body is an anode plate, and the first flow channel is used for flowing anode working gas of the fuel cell stack; and the second plate body is a cathode plate, and the second flow channel is used for flowing cathode working gas of the fuel cell stack.
7. The metallic bipolar plate of claim 1, wherein: the first plate body is a cathode plate, and the first flow channel is used for flowing cathode working gas of the fuel cell stack; and the second plate body is an anode plate, and the second flow channel is used for flowing anode working gas of the fuel cell stack.
8. The metallic bipolar plate of claim 1, wherein: the third flow channel is used for allowing a cooling liquid to flow so that the cooling liquid can cool the fuel cell stack.
9. A fuel cell stack characterized by: comprising a metallic bipolar plate according to any of claims 1 to 8.
10. The fuel cell stack according to claim 9, characterized in that: the metal bipolar plates and the membrane electrode assemblies are mutually staggered and stacked, and the first face and the fourth face are respectively attached and connected with the membrane electrode assemblies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221579468.7U CN218101325U (en) | 2022-06-22 | 2022-06-22 | Metal bipolar plate and fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221579468.7U CN218101325U (en) | 2022-06-22 | 2022-06-22 | Metal bipolar plate and fuel cell stack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218101325U true CN218101325U (en) | 2022-12-20 |
Family
ID=84475960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221579468.7U Active CN218101325U (en) | 2022-06-22 | 2022-06-22 | Metal bipolar plate and fuel cell stack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218101325U (en) |
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2022
- 2022-06-22 CN CN202221579468.7U patent/CN218101325U/en active Active
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