CN219513140U - Polar plate structure of fuel cell and fuel cell stack - Google Patents
Polar plate structure of fuel cell and fuel cell stack Download PDFInfo
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- CN219513140U CN219513140U CN202320286971.1U CN202320286971U CN219513140U CN 219513140 U CN219513140 U CN 219513140U CN 202320286971 U CN202320286971 U CN 202320286971U CN 219513140 U CN219513140 U CN 219513140U
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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 provides a polar plate structure of a fuel cell, which is suitable for the fuel cell and comprises a first polar plate and a second polar plate which are integrally formed; a water flow channel is arranged between the first polar plate and the second polar plate; a plurality of first conductive terminals which are independently arranged are arranged in the water flow channel, and each first conductive terminal is respectively connected with the first polar plate and the second polar plate in an abutting mode; the outer side face of each first conductive terminal is provided with a waterproof sleeve, and the waterproof sleeves are respectively connected with the first polar plate and the second polar plate in an abutting mode. The utility model also provides a fuel cell stack. The utility model can effectively improve the conductivity between the cathode plate and the anode plate, and can ensure that the formed cathode plate and the anode plate can be electrically connected without being temporarily or chronically non-conductive even if more liquid water is generated by reaction and even the water flow channel is full of the liquid water, thereby ensuring the normal operation of the battery or the electric pile.
Description
Technical Field
The present utility model relates to the field of fuel cells, and in particular, to a plate structure of a fuel cell and a fuel cell stack.
Background
Fuel cells utilize chemical conversion of fuel and oxygen to produce electrical energy and typically include end plates and a plurality of cell structures connected in series. Typically, a cell structure includes two electrode plates disposed opposite each other and a membrane electrode assembly disposed between the two electrode plates; adjacent two single cells are connected with the anode plate of the other single cell through the cathode plate of one single cell.
In the prior art, an integrally formed bipolar plate is often adopted as a bipolar plate of a single cell, wherein one plate is adopted as a cathode plate, and the other plate is adopted as an anode plate; a cooling liquid channel (i.e. a water flow channel) for draining water is arranged between the cathode plate and the anode plate, and is used for draining liquid water generated in the reaction process of the fuel cell. However, when the liquid water in the coolant channel is large, the conductivity between the integrally formed bipolar plates is reduced or even temporarily lost, which affects the normal use of the battery.
The fuel cell stack is composed of a plurality of single cells connected in series, and two adjacent single cells are connected with an anode plate of one single cell through a cathode plate of the other single cell. The galvanic pile can produce water in the reaction process, and the liquid water that produces flows to the water flow path of negative plate along the route that capillary pressure is little in the gas diffusion layer, forms great liquid droplet in the water flow path of negative plate at last, however when liquid droplet in the water flow path is great, the electric conduction performance between positive plate of negative plate and the adjacent monocell can decline even temporarily be nonconductive to influence the normal use of galvanic pile.
Disclosure of Invention
Based on the above, the embodiment of the utility model provides a polar plate structure of a fuel cell and a fuel cell stack, which aim to solve the problems that the conductivity between a cathode plate and an anode plate is reduced or even the conductivity is temporarily lost in the reaction process of the existing integrated bipolar plate or fuel cell stack to influence the normal use of the cell or the stack and the like. The utility model can effectively improve the conductivity between the cathode plate and the anode plate, and can ensure that the formed cathode plate and the anode plate can be electrically connected without being temporarily or chronically non-conductive even if more liquid water is generated by reaction and even the water flow channel is full of the liquid water, thereby ensuring the normal operation of the cell stack.
In order to achieve the above object, an embodiment of the present utility model provides a plate structure of a fuel cell, which is suitable for a fuel cell, and includes a first plate and a second plate that are integrally formed; a water flow channel is arranged between the first polar plate and the second polar plate; a plurality of first conductive terminals which are independently arranged are arranged in the water flow channel, and each first conductive terminal is respectively connected with the first polar plate and the second polar plate in an abutting mode; the outer side face of each first conductive terminal is provided with a waterproof sleeve, and the waterproof sleeves are respectively connected with the first polar plate and the second polar plate in an abutting mode.
As a preferred embodiment, two adjacent first conductive terminals are disposed at equal intervals.
In a preferred embodiment, the first conductive terminal is a spherical conductive terminal, and the diameter of the spherical conductive terminal is 10nm-20nm.
As a preferred embodiment, the first conductive terminal is a molten conductive paste or a molten conductive metal ball.
As a preferred embodiment, the molten conductive metal balls are tin balls.
As a preferred embodiment, the first conductive terminals are provided with six, and six first conductive terminals are uniformly disposed in the water flow path.
As a preferred embodiment, a membrane electrode assembly is disposed between the first electrode plate and the second electrode plate, and the membrane electrode assembly is disposed near the inner side of the first conductive terminal.
As a preferred embodiment, the waterproof sleeve is a rubber waterproof sleeve; the first polar plate is a cathode plate, and the second polar plate is an anode plate; or the first polar plate is an anode plate, and the second polar plate is a cathode plate.
On the other hand, the embodiment of the utility model also provides a fuel cell stack, which comprises a plurality of single cells connected in series, wherein each single cell comprises the polar plate structure of the fuel cell.
As a preferred embodiment, two adjacent single cells are connected with an anode plate of one single cell through a cathode plate of the other single cell, and a plurality of second conductive terminals are arranged between the cathode plate and the anode plate; each second conductive terminal is respectively connected with the cathode plate and the anode plate in an abutting mode.
As a preferred embodiment, two adjacent second conductive terminals are disposed at equal intervals.
In a preferred embodiment, the second conductive terminal is a spherical conductive terminal, and the diameter of the spherical conductive terminal is 10nm-20nm.
As a preferred embodiment, the second conductive terminal is a molten conductive paste or a molten conductive metal ball.
As a preferred embodiment, the molten conductive metal balls are tin balls.
As a preferred embodiment, the second conductive terminals are provided with six, and six second conductive terminals are uniformly provided between the cathode plate and the anode plate.
According to the utility model, the conductive terminal is arranged between the cathode plate and the anode plate, so that the conductivity between the cathode plate and the anode plate can be effectively improved, even if more liquid water is generated by the reaction and even the water flow channel is full, the formed cathode plate and the anode plate can be electrically connected, the electric conduction between the formed cathode plate and the anode plate can not be temporarily or permanently performed, the normal operation of a battery or a galvanic pile can be further ensured, and the problems that the conductivity between the cathode plate and the anode plate is reduced or even the electric conduction is temporarily lost due to more liquid water in the reaction process of the conventional integrally formed bipolar plate or the galvanic pile of the fuel cell, and the normal use of the battery or the galvanic pile is influenced can be effectively solved.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the embodiments.
Drawings
Fig. 1 is a schematic view of a partial cross section (cut along a direction parallel to a long side of a first electrode plate (a second electrode plate)) of an electrode plate structure of a fuel cell according to an embodiment of the present utility model;
FIG. 2 is a partial schematic structural view of a top structural perspective view of the plate structure of the fuel cell of FIG. 1;
fig. 3 is a schematic view of a partial cross section (cut along a direction parallel to a long side of a cathode plate (anode plate)) of a fuel cell stack according to another embodiment of the present utility model.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described in the following embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. 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 utility model, 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 utility model 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.
In the prior art, an integrally formed bipolar plate is often adopted as a bipolar plate of a single cell, wherein one plate is adopted as a cathode plate, and the other plate is adopted as an anode plate; a cooling liquid channel (i.e. a water flow channel) for draining water is arranged between the cathode plate and the anode plate, and is used for draining liquid water generated in the reaction process of the fuel cell. However, when the liquid water in the coolant channel is large, the conductivity between the integrally formed bipolar plates is reduced or even temporarily lost, which affects the normal use of the battery. The fuel cell stack is composed of a plurality of single cells connected in series, and two adjacent single cells are connected with an anode plate of one single cell through a cathode plate of the other single cell. The galvanic pile can produce water in the reaction process, and the liquid water that produces flows to the water flow path of negative plate along the route that capillary pressure is little in the gas diffusion layer, forms great liquid droplet in the water flow path of negative plate at last, however when liquid droplet in the water flow path is great, the electric conduction performance between positive plate of negative plate and the adjacent monocell can decline even temporarily be nonconductive to influence the normal use of galvanic pile. Accordingly, it is necessary to provide a plate structure of a fuel cell and a fuel cell stack to solve the above-mentioned problems.
To achieve the above object, as shown in fig. 1 to 2, an embodiment of the present utility model provides a plate structure of a fuel cell, which is suitable for a fuel cell, and includes a first plate 10 and a second plate 20 integrally formed; a water flow channel 30 is arranged between the first polar plate 10 and the second polar plate 20; a plurality of first conductive terminals 40 are arranged in the water flow path 30, and each first conductive terminal 40 is respectively connected with the first polar plate 10 and the second polar plate 20 in an abutting manner; the outer side surface of each first conductive terminal 40 is provided with a waterproof sleeve (not labeled in the figure), and the waterproof sleeves are respectively connected with the first polar plate 10 and the second polar plate 20 in an abutting mode.
As a preferred embodiment, two adjacent first conductive terminals 40 are disposed at equal intervals. Thus, the conductivity between the cathode plate and the anode plate can be effectively improved.
As a preferred embodiment, the first conductive terminal 40 is a spherical conductive terminal, and the diameter of the spherical conductive terminal is 10nm-20nm. Thus, the conductivity between the cathode plate and the anode plate can be further effectively improved.
In a preferred embodiment, the first conductive terminals 40 are molten conductive paste or molten conductive metal balls. Specifically, in the present embodiment, the first conductive terminal 40 is a molten conductive paste. It is understood that in other embodiments, the first conductive terminals 40 may be molten conductive metal balls (e.g., solder balls, etc.).
As a preferred embodiment, the molten conductive metal balls are tin balls.
As a preferred embodiment, the first conductive terminals 40 are provided with six, and six first conductive terminals 40 are uniformly disposed in the water channel 30.
As a preferred embodiment, a membrane electrode assembly (not shown) is disposed between the first electrode plate 10 and the second electrode plate 20, and the membrane electrode assembly is disposed near the inner side of the first conductive terminal 40.
As a preferred embodiment, the waterproof sleeve is a rubber waterproof sleeve; the first polar plate 10 is a cathode plate, and the second polar plate 20 is an anode plate; alternatively, the first electrode plate 10 is an anode plate, and the second electrode plate 20 is a cathode plate.
On the other hand, as shown in fig. 3, the embodiment of the present utility model also provides a fuel cell stack 100, which includes a plurality of unit cells a connected in series, the unit cells a including the plate structure of the fuel cell described above.
As a preferred embodiment, two adjacent single cells a are connected with the anode plate 102 of one single cell by the cathode plate 101 of the other single cell, and a plurality of second conductive terminals 103 are arranged between the cathode plate 101 and the anode plate 102; each second conductive terminal 103 is respectively connected with the cathode plate 101 and the anode plate 102 in an abutting manner.
As a preferred embodiment, two adjacent second conductive terminals 103 are disposed at equal intervals. Thus, the conductivity between the cathode plate and the anode plate can be effectively improved.
As a preferred embodiment, the second conductive terminal 103 is a spherical conductive terminal, and the diameter of the spherical conductive terminal is 10nm-20nm. Thus, the conductivity between the cathode plate and the anode plate can be further effectively improved.
As a preferred embodiment, the second conductive terminals 103 are molten conductive paste or molten conductive metal balls. Specifically, in the present embodiment, the second conductive terminal 103 is a molten conductive paste. It is understood that in other embodiments, the second conductive terminals 103 may be molten conductive metal balls (e.g., solder balls, etc.).
As a preferred embodiment, the molten conductive metal balls are tin balls.
As a preferred embodiment, the second conductive terminals 103 are provided with six, and six second conductive terminals 103 are uniformly disposed between the cathode plate 101 and the anode plate 102.
According to the utility model, the conductive terminal is arranged between the cathode plate and the anode plate, so that the conductivity between the cathode plate and the anode plate can be effectively improved, even if more liquid water is generated by the reaction and even the water flow channel is full, the formed cathode plate and the anode plate can be electrically connected, the electric conduction between the formed cathode plate and the anode plate can not be temporarily or permanently performed, the normal operation of a battery or a galvanic pile can be further ensured, and the problems that the conductivity between the cathode plate and the anode plate is reduced or even the electric conduction is temporarily lost due to more liquid water in the reaction process of the conventional integrally formed bipolar plate or the galvanic pile of the fuel cell, and the normal use of the battery or the galvanic pile is influenced can be effectively solved. The utility model has low cost and good processability, and is easy for batch or large-scale production.
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. The polar plate structure of a fuel cell, characterized by that, is suitable for the fuel cell, including the first polar plate and second polar plate that the integrated into one piece set up; a water flow channel is arranged between the first polar plate and the second polar plate; a plurality of first conductive terminals which are independently arranged are arranged in the water flow channel, and each first conductive terminal is respectively connected with the first polar plate and the second polar plate in an abutting mode; the outer side face of each first conductive terminal is provided with a waterproof sleeve, and the waterproof sleeves are respectively connected with the first polar plate and the second polar plate in an abutting mode.
2. The fuel cell plate structure of claim 1, wherein adjacent two of the first conductive terminals are disposed at equal intervals.
3. The fuel cell plate structure of claim 1, wherein the first conductive terminal is a spherical conductive terminal having a diameter of 10nm to 20nm.
4. The fuel cell plate structure of claim 3, wherein the first conductive terminals are molten conductive paste or molten conductive metal balls.
5. The fuel cell plate structure according to claim 1, wherein six of the first conductive terminals are provided, and six of the first conductive terminals are uniformly provided in the water flow path.
6. The fuel cell plate structure of claim 1, wherein a membrane electrode assembly is disposed between the first plate and the second plate, the membrane electrode assembly being disposed proximate an inner side of the first conductive endpoint;
the waterproof sleeve is a rubber waterproof sleeve; the first polar plate is a cathode plate, and the second polar plate is an anode plate; or the first polar plate is an anode plate, and the second polar plate is a cathode plate.
7. A fuel cell stack comprising a plurality of series-connected unit cells containing the plate structure of the fuel cell according to any one of claims 1 to 6.
8. The fuel cell stack according to claim 7, wherein two adjacent single cells are connected to an anode plate of one single cell by a cathode plate of the other single cell, a plurality of second conductive terminals being provided between the cathode plate and the anode plate; each second conductive terminal is respectively connected with the cathode plate and the anode plate in an abutting mode.
9. The fuel cell stack according to claim 8, wherein adjacent two of the second conductive terminals are disposed at equal intervals;
the second conductive terminal is a spherical conductive terminal, and the diameter of the spherical conductive terminal is 10nm-20nm.
10. The fuel cell stack of claim 9, wherein the second conductive terminals are molten conductive paste or molten conductive metal balls;
the second conductive terminals are arranged in six, and the six second conductive terminals are uniformly arranged between the cathode plate and the anode plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320286971.1U CN219513140U (en) | 2023-02-22 | 2023-02-22 | Polar plate structure of fuel cell and fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320286971.1U CN219513140U (en) | 2023-02-22 | 2023-02-22 | Polar plate structure of fuel cell and fuel cell stack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219513140U true CN219513140U (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320286971.1U Active CN219513140U (en) | 2023-02-22 | 2023-02-22 | Polar plate structure of fuel cell and fuel cell stack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219513140U (en) |
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- 2023-02-22 CN CN202320286971.1U patent/CN219513140U/en active Active
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