Fuel cell clamp

Abstract

The application discloses a fuel cell clamp. The fuel cell clamp comprises at least two polar plates, a membrane electrode package frame is arranged between two adjacent polar plates, a current collecting plate, an insulating plate and an end plate are sequentially arranged on two opposite sides of the at least two polar plates, a gas path flow channel is arranged on a side of the polar plate close to the membrane electrode package frame, a gas path inlet and a gas path outlet are arranged on an edge of the polar plate, a gas distribution cavity is arranged between the gas path inlet and the gas path flow channel and between the gas path outlet and the gas path flow channel, the gas path inlet and the gas path outlet are communicated with the gas path flow channel through the corresponding gas distribution cavities, and the cross-sectional area of the gas distribution cavity is larger than that of the gas path flow channel. By arranging the gas distribution cavities between the gas path inlet, the gas path outlet and the gas path flow channel, the water management and the gas distribution problem are effectively solved by utilizing the narrow tube effect and the Bernoulli principle, the performance and the durability of the fuel cell are improved, and an efficient and reliable tool is provided for the research and evaluation of the membrane electrode.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and more particularly to a fuel cell clamp. Background Technology

[0002] A fuel cell is an energy device that directly converts the chemical energy stored in fuel and oxidant into electrical energy. It has advantages such as high energy conversion efficiency, low environmental pollution, and long service life, and is widely used in transportation, power plants, portable power sources and other fields.

[0003] However, the durability and cost of fuel cells are among the technological challenges hindering their commercialization. During fuel cell operation, water generated in the reaction tends to accumulate on the membrane electrode assembly (MEA), preventing the reactant gases from fully contacting the MEA. This affects the efficiency and rate of the chemical reaction, limiting the overall performance and durability of the fuel cell. Therefore, efficient and reliable fuel cell fixtures are of great significance for the research and evaluation of MEAs. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a fuel cell clamp that achieves effective water management and gas distribution optimization, significantly improving the performance and durability of the fuel cell.

[0006] The fuel cell fixture of this invention includes at least two electrode plates, with a membrane electrode assembly frame between two adjacent electrode plates. A current collector, an insulating plate, and an end plate are sequentially provided on the relatively distant sides of each of the at least two electrode plates. A gas flow channel is provided on the side of each electrode plate near the membrane electrode assembly frame. A gas inlet and a gas outlet are provided at the edge of each electrode plate. A gas distribution cavity is provided between the gas inlet and the gas flow channel, and between the gas outlet and the gas flow channel, so that the gas inlet and the gas outlet are respectively connected to the gas flow channel through the corresponding gas distribution cavity. The cross-sectional area of ​​the gas distribution cavity is larger than the cross-sectional area of ​​the gas flow channel.

[0007] The fuel cell fixture of this invention, by setting a gas distribution cavity between the gas inlet and outlet and the gas flow channel, effectively solves the problems of water management and gas distribution by utilizing the septum effect and Bernoulli's principle, thereby improving the performance and durability of the fuel cell and providing an efficient and reliable tool for the research and evaluation of membrane electrode assemblies.

[0008] In some embodiments, the cross-sectional area of ​​the gas distribution chamber is more than two orders of magnitude larger than the cross-sectional area of ​​the gas flow channel.

[0009] In some embodiments, the gas distribution cavity extends along the width direction of the electrode plate, and the extension length of the gas distribution cavity is greater than or equal to the distance of the gas passage in the width direction of the electrode plate.

[0010] In some embodiments, the cross-sectional area of ​​the gas distribution chamber on the gas inlet side gradually decreases along the gas flow direction, while the cross-sectional area of ​​the gas distribution chamber on the gas outlet side gradually increases along the gas flow direction.

[0011] In some embodiments, the at least two plates include an anode plate and a cathode plate. The gas distribution chamber of the anode plate includes an anode inlet gas distribution chamber and an anode outlet gas distribution chamber, and the cross-sectional area of ​​the anode inlet gas distribution chamber is larger than the cross-sectional area of ​​the anode outlet gas distribution chamber. The gas distribution chamber of the cathode plate includes a cathode inlet gas distribution chamber and a cathode outlet gas distribution chamber, and the cross-sectional area of ​​the cathode inlet gas distribution chamber is smaller than the cross-sectional area of ​​the cathode outlet gas distribution chamber.

[0012] In some embodiments, the cross-sectional area of ​​the anode inlet gas distribution cavity is smaller than the cross-sectional area of ​​the cathode inlet gas distribution cavity.

[0013] In some embodiments, the gas inlet and the gas outlet are symmetrically arranged along the center of the electrode plate.

[0014] In some embodiments, the edge of the electrode plate is further provided with a cooling water inlet, a cooling water outlet, and a collection interface. The cooling water inlet, the cooling water outlet, and the collection interface are all located on the same side as the gas inlet. The cooling water inlet and the cooling water outlet are respectively connected to the water flow channels of the electrode plate, and the collection interface extends toward the center of the electrode plate.

[0015] In some embodiments, the current collector is provided with a conductive connector.

[0016] In some embodiments, the electrode plate, the membrane electrode encapsulation frame, the current collector, the insulating plate, and the end plate are all provided with corresponding connection holes, which are used to install fixing components. Attached Figure Description

[0017] Figure 1 This is a first structural schematic diagram of the fuel cell clamp according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the second structure of the fuel cell clamp according to an embodiment of the present invention.

[0019] Figure 3 This is an exploded view of the fuel cell clamp according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the anode plate of the fuel cell clamp according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the cathode plate of the fuel cell clamp according to an embodiment of the present invention.

[0022] Figure label: 1-Electrode plate; 11-Anode plate; 12-Cathode plate; 101 - Gas inlet; 1011 - Anode gas inlet; 1012 - Cathode gas inlet; 102 - Gas outlet; 1021 - Anode gas outlet; 1022 - Cathode gas outlet; 1031 - Anode inlet gas distribution chamber; 1032 - Anode outlet gas distribution chamber; 1033 - Cathode inlet gas distribution chamber; 1034 - Cathode outlet gas distribution chamber; 1041 - Anode cooling water inlet; 1042 - Cathode cooling water inlet; 1051 - Anode cooling water outlet; 1052 - Cathode cooling water outlet; 1061 - Anode acquisition interface; 1062 - Cathode acquisition interface; 2-Film electrode packaging frame; 3-Current collector; 31-Front current collector; 32-Rear current collector; 301-Conductive connector; 4-Insulating board; 41-Front insulating board; 42-Rear insulating board; 5-End board; 51-Front end board; 52-Rear end board; 6-Connecting hole. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The fuel cell clamp of the present invention is described below with reference to the accompanying drawings.

[0025] like Figures 1 to 5 As shown, the fuel cell fixture of this embodiment includes at least two electrode plates 1, and a membrane electrode encapsulation frame 2 is provided between two adjacent electrode plates 1. The membrane electrode encapsulation frame 2 is used to encapsulate the membrane electrode (not shown in the figure). At least two electrode plates 1 are provided with a current collector 3, an insulating plate 4 and an end plate 5 on their relatively far sides.

[0026] A gas flow channel is provided on the side of the electrode plate 1 near the membrane electrode encapsulation frame 2, and a gas inlet 101 and a gas outlet 102 are provided on the edge of the electrode plate 1. Gas distribution chambers are provided between the gas inlet 101 and the gas flow channel, and between the gas outlet 102 and the gas flow channel, so that the gas inlet 101 and the gas outlet 102 are respectively connected to the gas flow channel through the corresponding gas distribution chambers. The cross-sectional area of ​​the gas distribution chamber is larger than the cross-sectional area of ​​the gas flow channel.

[0027] The cross-sectional area of ​​the gas distribution chamber is much larger than that of the gas flow channel, causing the channel to narrow abruptly as gas enters from the distribution chamber. According to the vena cava effect in fluid mechanics, the flow velocity increases sharply when fluid passes through a narrow area. This increased airflow velocity helps to quickly remove water generated in the fuel cell reaction from the membrane electrode assembly (MEA), preventing water accumulation on the MEA surface. Rapidly removing the water generated in the reaction keeps the MEA dry, improves the contact efficiency between the reactant gas and the MEA, thereby enhancing the equilibrium and rate of the chemical reaction and improving the output performance of the fuel cell.

[0028] Bernoulli's principle states that in fluid flow, the faster the velocity, the lower the pressure; conversely, the slower the velocity, the higher the pressure. The large cross-sectional area within the gas distribution chamber causes the gas to flow faster and the pressure to decrease as it enters the narrow gas path. This promotes a uniform gas distribution within the gas path, preventing excessively high or low gas concentrations in localized areas, thereby optimizing reaction conditions and further improving fuel cell performance.

[0029] Gas distribution chambers are provided between the gas inlet 101 and outlet of electrode 1 and the gas flow channel to ensure that the gas undergoes the aforementioned changes in flow rate and pressure when entering and leaving the gas flow channel, thereby achieving bidirectional water management and gas distribution optimization. Optimized gas distribution and effective water management reduce the performance degradation and shortened lifespan of the membrane electrode caused by moisture accumulation, extending the overall service life of the fuel cell.

[0030] The fixture adopts a modular design, which makes it easy to design different flow fields according to different experimental requirements, efficiently and quickly feedback the performance of fuel cell membrane electrodes, and support diversified research and development and evaluation work.

[0031] Therefore, the fuel cell fixture of this invention, by setting a gas distribution cavity between the gas inlet 101 and the gas outlet 102 and the gas flow channel, effectively solves the problems of water management and gas distribution by utilizing the narrow tube effect and Bernoulli's principle, improves the performance and durability of the fuel cell, and also provides an efficient and reliable tool for the research and evaluation of membrane electrode assembly.

[0032] Optionally, the cross-sectional area of ​​the gas distribution chamber is more than two orders of magnitude larger than the cross-sectional area of ​​the gas flow channel. That is, the cross-sectional area of ​​the gas distribution chamber is much larger than the cross-sectional area of ​​the gas flow channel. This design ensures a sufficient narrow tube effect, ensuring that the increase in flow velocity is significant enough when the gas enters the flow channel, thereby achieving the expected technical effect.

[0033] In some embodiments, such as Figure 1 , Figure 4 and Figure 5 As shown, the gas distribution chamber extends along the width direction of the electrode plate 1, and the extension length of the gas distribution chamber is greater than or equal to the distance of the gas flow channel in the width direction of the electrode plate 1. The width direction of the electrode plate 1 can be... Figure 1 The up and down directions are shown in the diagram.

[0034] Understandably, the gas distribution chamber extends along the width of electrode plate 1, and its extension length is greater than or equal to the distance of the gas flow channel in the width direction of electrode plate 1. The main purpose of this design is to ensure that the gas distribution chamber can completely cover the inlet slit of the gas flow channel, thereby achieving uniform gas distribution and improving the performance and lifespan of the fuel cell.

[0035] Optionally, by setting the extension length of the gas distribution chamber to be equal to the distance of the gas path in the width direction of the electrode plate 1, it is ensured that the gas distribution chamber completely covers the inlet slit. This allows the gas to be evenly distributed across the entire width of the gas path, avoiding abnormal airflow velocity in localized areas. Uniform gas distribution helps improve the contact efficiency between the reactant gas and the membrane electrode assembly, ensuring the equilibrium and positive rate development of the chemical reaction, thereby enhancing the output performance of the fuel cell.

[0036] In some embodiments, the cross-sectional area of ​​the gas distribution chamber on the gas inlet 101 side gradually decreases along the gas flow direction, while the cross-sectional area of ​​the gas distribution chamber on the gas outlet 102 side gradually increases along the gas flow direction, thereby optimizing the gas flow characteristics and improving the overall performance and lifespan of the fuel cell.

[0037] Understandably, the cross-sectional area of ​​the gas distribution chamber on one side of the gas inlet 101 gradually decreases. According to the vena cava effect in fluid mechanics, the gas velocity increases as the cross-sectional area decreases. This accelerated gas flow helps to quickly remove water generated by the fuel cell reaction, preventing water accumulation on the membrane electrode assembly (MEA). By accelerating the gas flow, water is more effectively removed from the MEA surface, keeping the MEA dry and improving the contact efficiency between the reactant gas and the MEA, thereby enhancing the equilibrium and rate of the chemical reaction. The tapered design helps to achieve a more uniform gas distribution when the gas enters the gas path. This ensures that the reactant gas can uniformly cover the entire MEA, optimizing the reaction conditions.

[0038] The cross-sectional area of ​​the gas distribution chamber on one side of gas outlet 102 gradually increases. According to Bernoulli's principle, the gas flow velocity decreases as the cross-sectional area increases. This decelerated gas flow helps to better collect and discharge the water generated in the reaction, preventing water from accumulating in the gas path. By slowing down the gas flow, the gas can be more evenly distributed when leaving the gas path, reducing water residue and ensuring unobstructed flow. The gradually expanding design helps to achieve more stable gas flow when leaving the gas path, reducing flow instabilities such as the generation of eddies, thereby improving overall operational stability.

[0039] The tapered design on the inlet side and the expanding design on the outlet side are optimized for the flow characteristics of gas entering and leaving the fuel cell, respectively. The inlet side focuses on accelerating gas flow to improve water management efficiency, while the outlet side focuses on decelerating gas flow to optimize gas discharge. By optimizing the gas flow at both the inlet and outlet, this design improves the overall performance and lifespan of the fuel cell. The accelerated gas flow helps to remove water and keep the membrane electrode assembly dry; the decelerated gas flow helps to uniformly discharge water and ensure unobstructed gas flow.

[0040] In some embodiments, such as Figures 1 to 5 As shown, the gas inlet 101 and the gas outlet 102 are symmetrically arranged along the center of the electrode plate 1. The gas inlet 101 is located at the upper edge of the electrode plate 1, and the gas outlet 102 is located at the lower edge of the electrode plate 1.

[0041] Understandably, the centrally symmetrical arrangement allows the gas inlet 101 and gas outlet 102 to be located on opposite sides of the electrode plate 1, ensuring that the gas is evenly distributed throughout the gas flow path during entry and exit, preventing excessively high or low gas concentrations in localized areas. This uniform gas distribution ensures sufficient contact between the reactant gas and the membrane electrode assembly, improving the efficiency and rate of the chemical reaction, thereby enhancing the fuel cell's output performance.

[0042] In some embodiments, such as Figures 1 to 5 As shown, at least two electrode plates 1 include an anode plate 11 and a cathode plate 12. The gas inlet 101 of the anode plate 11 includes an anode gas inlet 1011 and an anode gas outlet 1021, and the gas distribution chamber of the anode plate 11 includes an anode inlet gas distribution chamber 1031 and an anode outlet gas distribution chamber 1032. The gas inlet 101 of the cathode plate 12 includes a cathode gas inlet 1012 and a cathode gas outlet 1022, and the gas distribution chamber of the cathode plate 12 includes a cathode inlet gas distribution chamber 1033 and a cathode outlet gas distribution chamber 1034.

[0043] Among them, the cross-sectional area of ​​the anode inlet gas distribution chamber 1031 is larger than the cross-sectional area of ​​the anode outlet gas distribution chamber 1032, and the cross-sectional area of ​​the cathode inlet gas distribution chamber 1033 is smaller than the cross-sectional area of ​​the cathode outlet gas distribution chamber 1034.

[0044] Understandably, the larger cross-sectional area of ​​the anode inlet gas distribution chamber 1031 helps accelerate gas entry into the gas path, utilizing the narrow tube effect to increase gas velocity. This high-speed airflow helps quickly remove water generated in the fuel cell reaction, preventing water accumulation on the membrane electrode assembly (MEA) and maintaining its dryness. Conversely, the smaller cross-sectional area of ​​the anode outlet gas distribution chamber 1032 helps slow gas flow, ensuring sufficient water removal and preventing accumulation at the outlet. This design optimizes water management and improves fuel cell lifespan.

[0045] The cathode inlet gas distribution chamber 1033 has a smaller cross-sectional area, which helps to accelerate gas entry into the gas path, increase gas flow rate, and optimize gas distribution. The high-speed gas flow helps to quickly remove water generated in the reaction, keeping the membrane electrode assembly dry. The cathode outlet gas distribution chamber 1034 has a larger cross-sectional area, which helps to slow down gas flow, ensure uniform gas distribution, and improve reaction efficiency. This design helps optimize gas flow and improve fuel cell performance.

[0046] The different cross-sectional areas of the gas distribution chambers at the anode and cathode help balance the gas flow characteristics of the entire fuel cell system. The anode side focuses on accelerating gas flow and removing water, while the cathode side focuses on optimizing gas distribution and improving reaction efficiency.

[0047] It is important to note that the anode side primarily involves the oxidation of hydrogen, and the water generated needs to be promptly drained to avoid impacting reaction efficiency. Therefore, the anode side design focuses on increasing gas flow rate to achieve efficient water management. The cathode side primarily involves the reduction of oxygen, requiring sufficient contact between oxygen and the membrane electrode assembly. Therefore, the cathode side design focuses on uniform gas distribution to improve oxygen utilization and reaction efficiency.

[0048] Furthermore, the cross-sectional area of ​​the anode inlet gas distribution chamber 1031 is smaller than that of the cathode inlet gas distribution chamber 1033, achieving a higher gas flow rate on the anode side to carry away the water generated in the reaction and keep the membrane electrode assembly dry; simultaneously, it achieves a more uniform gas distribution on the cathode side, improving oxygen utilization. This design, by optimizing gas flow characteristics, improves the overall performance and lifespan of the fuel cell, providing important technical support for the development of fuel cell technology.

[0049] In some embodiments, such as Figures 1 to 5 As shown, the anode plate 11 is located behind the cathode plate 12, and a membrane electrode encapsulation frame 2 is provided between the anode plate 11 and the cathode plate 12. A rear current collector 32, a rear insulating plate 42, and a rear end plate 52 are sequentially arranged behind the anode plate 11. A front current collector 31, a front insulating plate 41, and a front end plate 51 are sequentially arranged on the front side of the cathode plate 12.

[0050] The electrode 1 is made by bonding or welding two graphite plates or other high-conductivity, corrosion-resistant materials. A milled gas flow channel is formed on one side of the electrode 1 surface. The membrane electrode encapsulation frame 2 is made of an insulating, heat-resistant, high-strength thin film material. The front current collector 31 and rear current collector 32 are made of gold-plated copper or other high-conductivity, corrosion-resistant materials. The front insulating plate 41 and rear insulating plate 42 are made of insulating, high-temperature resistant, high-strength materials. The front end plate 51 and rear end plate 52 are made of high-strength alloy.

[0051] Optionally, such as Figures 1 to 3 As shown, the electrode plate 1, membrane electrode assembly frame 2, current collector 3, insulating plate 4, and end plate 5 are all provided with corresponding connection holes 6. These connection holes 6 are used to install fasteners (e.g., bolts). During installation of the fuel cell fixture in this embodiment, the rear end plate 52, rear insulating plate 42, rear current collector 32, anode plate 11, membrane electrode assembly frame 2, cathode plate 12, front current collector 31, front insulating plate 41, and front end plate 51 are stacked and installed sequentially. After stacking and installation, bolts of appropriate length are passed through the multiple connection holes 6 for secure installation.

[0052] An external hydrogen pipeline is connected to the fixture via the anode gas inlet 1011, flows into the gas channel via the anode inlet gas distribution chamber 1031, and contacts the membrane electrode in the gas channel area between the anode plate 11 and the membrane electrode encapsulation frame 2 to react. After that, it flows out through the anode outlet gas distribution chamber 1032 and then out through the anode gas outlet 1021.

[0053] An external air pipe is connected to the fixture via the cathode gas inlet 1012, flows into the gas channel via the cathode inlet gas distribution chamber 1033, and contacts the membrane electrode in the gas channel area between the cathode plate 12 and the membrane electrode encapsulation frame 2 to react. After that, it flows out through the cathode outlet gas distribution chamber 1034 and then out through the cathode gas outlet 1022.

[0054] Optionally, such as Figure 1 and Figure 2 As shown, both the front current collector 31 and the rear current collector 32 are provided with conductive connectors 301. The fuel cell fixture of this embodiment of the invention uses the conductive connectors 301 on the front current collector 31 and the rear current collector 32 to connect to the electronic load, and can control and monitor the operating current and voltage.

[0055] In some embodiments, such as Figures 1 to 5 As shown, the edge of the electrode plate 1 is also provided with a cooling water inlet, a cooling water outlet, and a collection interface. The cooling water inlet, cooling water outlet, and collection interface are all located on the same side as the gas inlet 101. The cooling water inlet and cooling water outlet are respectively connected to the water flow channels of the electrode plate 1, and the collection interface extends towards the center of the electrode plate 1.

[0056] The anode plate 11 is provided with an anode cooling water inlet 1041, an anode cooling water outlet 1051 and an anode acquisition interface 1061, and the cathode plate 12 is provided with a cathode cooling water inlet 1042, a cathode cooling water outlet 1052 and a cathode acquisition interface 1062.

[0057] It is understandable that electrode 1 can be connected to a voltage detector via a temperature-voltage acquisition interface connecting wire (not shown in the figure), which can eliminate the contact resistance between electrode 1 and current collector 3 and obtain a more accurate membrane electrode voltage; electrode 1 can be connected to a thermocouple (not shown in the figure) via a temperature-voltage acquisition interface, which can directly acquire the center temperature of electrode 1 to improve temperature control accuracy.

[0058] The external water circuit is equipped with a heater and a radiator. The cooling water inlet temperature can be set. The temperature control fluid inlet temperature can be set according to the current operating conditions and battery status requirements. The temperature control fluid enters the fixture from the cooling water circuit inlet, flows into the water channel inside the electrode plate 1, and flows out of the fixture from the cooling water circuit outlet.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0063] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fuel cell clamp, characterized in that, The device includes at least two electrode plates, with a membrane electrode encapsulation frame between two adjacent electrode plates. A current collector, an insulating plate, and an end plate are sequentially provided on the relatively distant sides of each of the at least two electrode plates. A gas flow channel is provided on the side of each electrode plate near the membrane electrode encapsulation frame. A gas inlet and a gas outlet are provided at the edge of each electrode plate. Gas distribution chambers are provided between the gas inlet and the gas flow channel, and between the gas outlet and the gas flow channel, so that the gas inlet and the gas outlet are respectively connected to the gas flow channel through the corresponding gas distribution chambers. The cross-sectional area of ​​the gas distribution chamber is larger than the cross-sectional area of ​​the gas flow channel. The cross-sectional area of ​​the gas distribution cavity is more than two orders of magnitude larger than the cross-sectional area of ​​the gas flow channel. The gas distribution cavity extends along the width direction of the electrode plate, and the extension length of the gas distribution cavity is greater than or equal to the distance of the gas flow channel in the width direction of the electrode plate. The at least two electrode plates include an anode plate and a cathode plate. The gas distribution chamber of the anode plate includes an anode inlet gas distribution chamber and an anode outlet gas distribution chamber. The cross-sectional area of ​​the anode inlet gas distribution chamber is larger than that of the anode outlet gas distribution chamber. The gas distribution chamber of the cathode plate includes a cathode inlet gas distribution chamber and a cathode outlet gas distribution chamber. The cross-sectional area of ​​the cathode inlet gas distribution chamber is smaller than that of the cathode outlet gas distribution chamber. The cross-sectional area of ​​the anode inlet gas distribution chamber is smaller than that of the cathode inlet gas distribution chamber.

2. The fuel cell clamp according to claim 1, characterized in that, The cross-sectional area of ​​the gas distribution chamber on the gas inlet side gradually decreases along the gas flow direction, while the cross-sectional area of ​​the gas distribution chamber on the gas outlet side gradually increases along the gas flow direction.

3. The fuel cell clamp according to claim 1, characterized in that, The gas inlet and the gas outlet are symmetrically arranged along the center of the electrode plate.

4. The fuel cell clamp according to claim 3, characterized in that, The edge of the electrode plate is also provided with a cooling water inlet, a cooling water outlet and a collection interface. The cooling water inlet, the cooling water outlet and the collection interface are all located on the same side as the gas inlet. The cooling water inlet and the cooling water outlet are respectively connected to the water flow channel of the electrode plate, and the collection interface extends toward the center of the electrode plate.

5. The fuel cell clamp according to claim 1, characterized in that, The current collector is equipped with a conductive connector.

6. The fuel cell clamp according to claim 1, characterized in that, The electrode plate, the membrane electrode encapsulation frame, the current collector, the insulating plate, and the end plate are all provided with corresponding connection holes, which are used to install fixing components.

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