End plate of air-cooled fuel cell internally integrated with anode circulating supply system

Abstract

The invention provides an end plate of an air-cooled fuel cell internally integrated with an anode circulating supply system. The end plate comprises an anode supply end plate, and an air inlet valve, an ejector, a water segregator and a drain valve which are arranged in the anode supply end plate, an anode inlet is formed in one side of the upper part of the anode supply end plate and is connected to the head end of a hydrogen conveying pipeline, the hydrogen conveying pipeline is sequentially connected with an air inlet valve and an ejector in series, and the tail end of the hydrogen conveying pipeline is connected to a galvanic pile inlet; a water segregator is further connected below the ejector, a Tesla valve is arranged between the ejector and the water segregator, the water segregator is connected with an electric pile outlet, the water segregator is connected with a drain valve, and the drain valve is further connected with an anode outlet. The air supply end plate of the air-cooled fuel cell is defined as the anode supply end plate, the functions are highly integrated, the appearance is simple, and rapid deployment of fuel cell system application is facilitated; for a low-power air-cooled fuel cell system, anode supply circulation is increased, anode water management of the air-cooled fuel cell is improved, the water and gas discharging period is prolonged, the utilization rate of fuel is improved, the efficiency of the fuel cell is improved, the water logging phenomenon is avoided, and the safety is improved. Parts are of pure mechanical structures, no moving parts exist, and the advantages of being long in service life and free of maintenance are achieved.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, and particularly to an end plate of an air-cooled fuel cell internally integrated with an anode circulation supply system. Background Art

[0002] As an efficient, clean, and zero-carbon energy conversion device, fuel cells have broad application prospects in fields such as transportation and distributed power generation. And due to its advantages such as simple structure and low cost, air-cooled fuel cells are booming in fields such as low-altitude economy, base station power supply, and shared bicycles.

[0003] However, there are currently some problems with air-cooled fuel cells on the anode side. In the traditional anode supply design, the existing end plates of air-cooled fuel cells are only used as clamping and fixing end plates for the stack, with large size and heavy weight. Only inlet and exhaust valves are designed and are independently set, which not only increases the volume and complexity of the system, but also increases the length of the connecting pipelines, resulting in an increase in gas flow resistance and energy loss. In addition, there is space waste. Moreover, the anode side is only designed for periodic exhaust, and the anode water management is poor, which easily leads to flooding, affecting the performance and stability of the fuel cell, and the periodic exhaust also results in low fuel utilization efficiency. Also, the uneven distribution of gas in the anode flow channels will also reduce the power generation efficiency of the fuel cell. Summary of the Invention

[0004] The purpose of the present invention is to provide an end plate of an air-cooled fuel cell internally integrated with an anode circulation supply system.

[0005] The present invention realizes the above purpose through the following technical solutions: An end plate of an air-cooled fuel cell internally integrated with an anode circulation supply system, including an anode supply end plate, an intake valve, an ejector, a water separator, and a drain valve arranged inside the anode supply end plate; on one side of the upper part of the anode supply end plate, there is an anode inlet, the anode inlet is connected to the head end of a hydrogen delivery pipeline, the hydrogen delivery pipeline is successively connected in series with an intake valve and an ejector, and the tail end of the hydrogen delivery pipeline is connected to a stack inlet; there is also a water separator connected below the ejector, a Tesla valve is arranged between the ejector and the water separator, the water separator is connected to the stack outlet, the water separator is connected to the drain valve, and the drain valve is then connected to the anode outlet.

[0006] Further, the hydrogen delivery pipeline is horizontally arranged transversely.

[0007] Further, hydrogen passes through the hydrogen delivery pipeline from the anode inlet, and then successively passes through the intake valve and the ejector and enters the stack inlet for reaction.

[0008] Further, some of the substances coming out of the stack outlet are residual hydrogen that has not reacted completely and water generated by the reaction, and the drain valve is connected to the anode outlet.

[0009] Further, the Tesla valve is used to connect the water distribution tank and the ejector chamber of the ejector.

[0010] Further, the intake valve adopts a proportional valve.

[0011] Further, the ejector adopts a Venturi tube.

[0012] Compared with the prior art, the beneficial effects of the end plate of the air-cooled fuel cell with an internally integrated anode circulation supply system are as follows: In the present invention, the air supply end plate of the air-cooled fuel cell is defined as the anode supply end plate, with highly integrated functions and a simple appearance, facilitating the rapid deployment of the fuel cell system application; for small-power air-cooled fuel cell systems, the anode supply circulation is increased, the anode water management of the air-cooled fuel cell is improved, the drainage and exhaust cycle is extended, the fuel utilization rate is increased, the fuel cell efficiency is improved, the waterlogging phenomenon is avoided, and the safety is enhanced. The components adopt a pure mechanical structure without moving parts, having the advantages of long life and maintenance-free. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present invention.

[0014] Figure 2 is Figure 1 the front view of Detailed Embodiments

[0015] Please refer to Figure 1 and Figure 2 , an end plate of an air-cooled fuel cell with an internally integrated anode circulation supply system, including an anode supply end plate 100, an intake valve 2, an ejector 3, a water separator 6, and a drain valve 8 disposed inside the anode supply end plate 100. One side of the upper part of the anode supply end plate 100 is provided with an anode inlet 1, and the anode inlet 1 is connected to the head end of a hydrogen delivery pipeline 10. The hydrogen delivery pipeline 10 is successively connected in series with an intake valve 2 and an ejector 3, and the tail end of the hydrogen delivery pipeline 10 is connected to a stack inlet 4. The hydrogen delivery pipeline 10 is horizontally arranged. Hydrogen enters from the anode inlet 1 through the hydrogen delivery pipeline 10, and then successively passes through the intake valve 2 and the ejector 3 and enters through the stack inlet 4 for reaction.

[0016] The ejector 3 is also connected with a water separator 6 below, a Tesla valve 7 is provided between the ejector 3 and the water separator 6, and the water separator 6 is connected to the drain valve 8.

[0017] The ejector 3 utilizes the Venturi tube effect to eject the hydrogen in the water separator 6 by the high-speed energy flow hydrogen input through the intake valve 2, so as to form an internal circulation in the anode supply system of the air-cooled fuel cell.

[0018] The Tesla valve 7 is used to connect the water distribution tank 6 and the ejector cavity 31 of the ejector 3. By utilizing its one-way flow characteristics, it not only improves the ejector effect of the ejector 3, but also prevents the hydrogen from being directly discharged through the ejector cavity 31 to the water distribution tank 6 when operating at low power and low flow rate.

[0019] The ejector uses a high-speed, high-energy flow to eject another low-speed, low-energy flow. The jet enters the mixing chamber through the contracting nozzle and transfers energy to the ejected jet through boundary mixing. The mixing zone formed by the mixing gradually expands and fills the entire mixing chamber. After the mixing process, a uniform flow is formed at the outlet of the mixing chamber. There is usually a diffuser at the end to reduce the flow rate and increase the static pressure.

[0020] The ejector is usually composed of a nozzle, a receiving chamber, a mixing chamber, a diffusion chamber, etc. The nozzle reduces the pressure of the high-pressure working fluid and increases its speed to form a high-speed jet; the receiving chamber is used to inhale the ejection fluid; the mixing chamber allows the working fluid and the ejection fluid to be fully mixed and exchange momentum; the diffusion chamber reduces the speed and increases the pressure of the mixed fluid.

[0021] The water separator 6 is connected to the stack outlet 5 . The substances coming out of the stack outlet 5 include some residual hydrogen that has not reacted completely and water produced by the reaction. The drain valve 8 is connected to the anode outlet 9 .

[0022] The intake valve 2 adopts a proportional valve, which can adjust the gas supply pressure in time according to different operating conditions of the system, and improve the fuel cell anode water management and gas distribution uniformity through pressure change adjustment.

[0023] The drain valve 8 can respond to control requirements, exhaust and drain air as needed, and improve the gas supply quality of the fuel cell anode; it can also automatically drain water according to the liquid level status of the water distributor.

[0024] Advantages of the invention: The invention defines the air supply end plate of the air-cooled fuel cell as the anode supply end plate, which has highly integrated functions and a simple appearance, and is convenient for rapid deployment of fuel cell system applications; for low-power air-cooled fuel cell systems, it increases the anode supply cycle, improves the anode water management of the air-cooled fuel cell, extends the drainage and exhaust cycle, improves the fuel utilization rate, improves the fuel cell efficiency, avoids flooding, and improves safety. The components adopt a purely mechanical structure, have no moving parts, and have the advantages of long life and maintenance-free.

[0025] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0026] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. A person skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. An end plate of an air-cooled fuel cell with an internally integrated anode circulation supply system, characterized in that: It includes an anode supply end plate, an air intake valve, an ejector, a water distributor and a drain valve arranged inside the anode supply end plate; an anode inlet is arranged on one side of the upper part of the anode supply end plate, the anode inlet is connected to the head end of the hydrogen delivery pipeline, the hydrogen delivery pipeline is sequentially connected in series with the air intake valve and the ejector, and the end of the hydrogen delivery pipeline is connected to the fuel cell stack inlet; a water distributor is also arranged below the ejector, a Tesla valve is arranged between the ejector and the water distributor, the water distributor is connected to the fuel cell stack outlet, the water distributor is connected to the drain valve, and the drain valve is connected to the anode outlet.

2. The end plate of an air-cooled fuel cell with an internally integrated anode circulation supply system according to claim 1, characterized in that: The hydrogen transmission pipeline is arranged horizontally.

3. The end plate of an air-cooled fuel cell with an internally integrated anode circulation supply system according to claim 1, characterized in that: Hydrogen enters the anode through the hydrogen delivery pipeline, and then passes through the intake valve and ejector to enter the fuel cell stack entrance for reaction.

4. The end plate of an air-cooled fuel cell with an internally integrated anode circulation supply system according to claim 1, characterized in that: The substances coming out of the stack outlet include some residual hydrogen that has not reacted completely and water produced by the reaction. The drain valve is connected to the anode outlet.

5. The end plate of an air-cooled fuel cell with an internally integrated anode circulation supply system according to claim 1, characterized in that: The Tesla valve is used to connect the water distribution tank and the ejector chamber of the ejector.

6. The end plate of an air-cooled fuel cell with an internally integrated anode circulation supply system according to claim 1, characterized in that: The intake valve adopts a proportional valve.

7. The end plate of an air-cooled fuel cell with an internally integrated anode circulation supply system according to claim 1, characterized in that: The ejector adopts a Venturi tube.

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