Fuel cell gas humidifying system

Abstract

The utility model relates to the technical field of fuel cells, and discloses a fuel cell gas humidifying system. The fuel cell gas humidifying system comprises an inner cylinder and an outer cylinder, the inner cylinder is sleeved with the outer cylinder, a first bottom face is arranged at one end of the inner cylinder, a second bottom face is arranged in the middle of the cylinder wall of the inner cylinder, a water supply pipeline and a gas outlet pipeline are arranged on the first bottom face, and a gas inlet pipeline is arranged on the second bottom face. The gas inlet pipeline penetrates through the first bottom surface of the inner cylinder and the top of the outer cylinder and is communicated with an external gas source pipeline, the second bottom surface is also provided with a gas distributor, the gas distributor is communicated with the second bottom surface, the inner cylinder is filled with a filler layer, the filler layer is filled above the second bottom surface, the bottom of the outer cylinder is filled with water, and the liquid level of the water is higher than the cylinder wall of the inner cylinder. According to the utility model, the mass and heat transfer efficiency between water and gas is improved so as to ensure the humidifying effect of the gas, so that the proton membrane is ensured to be in a proper hydration state and maintain higher conductivity, and the fuel cell works stably and efficiently.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel cells, and in particular relates to a fuel cell gas humidification system. Background Art

[0002] The proton exchange membrane (PEM) fuel cell (PEMFC) membrane must be hydrated to conduct protons. The proper water status of the fuel cell's proton membrane determines the quality, performance, and lifespan of the hydrogen fuel cell. Excessive or insufficient water in the cell can degrade battery performance. Excessive water can cause "flooding," which submerges the porous electrodes and hinders electrochemical reactions. It also reduces catalyst activity and slows the electrochemical reaction rate within the cell, leading to performance degradation. Excessive water can cause the PEM membrane to dry out, hindering the transfer of protons from the anode to the cathode and further reducing battery performance. The more water the PEM membrane absorbs, the better its conductivity. During fuel cell operation, the gas entering the hydrogen fuel cell reaction requires humidification. Currently, PEMFC humidification technologies primarily rely on membrane humidification or bubbler humidifiers. Bubbler humidifiers can typically achieve saturated humidification, but temperature and humidity control is unstable, requiring verification of the correct dew point temperature. While humidity and temperature control is stable, saturated humidification is often not achieved due to mass transfer rate limitations, requiring verification of the actual humidified humidity. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the present invention provides a fuel cell gas humidification system, which mainly solves the problems of the existing humidification technology that the mass and heat transfer cannot be efficiently carried out, and the temperature and humidity cannot be accurately controlled.

[0004] In order to achieve the above-mentioned purpose of facilitating the placement of sample tubes of different sizes, the present invention provides the following technical solutions:

[0005] A fuel cell gas humidification system is characterized in that it comprises: an inner tube and an outer tube, the outer tube (2) is sleeved outside the inner tube, the inner tube and the outer tube walls have a gap, the outer tube is a closed tube, one end of the inner tube is provided with a first bottom surface, the middle of the inner tube wall is provided with a second bottom surface, the first bottom surface is sealed with the outer tube wall, the other end of the inner tube is open, the first bottom surface is provided with a water supply pipeline and an air outlet pipeline, the water supply pipeline and the air outlet pipeline pass through the outer tube wall and are sealed with the outer tube wall, the water supply pipeline is provided with a one-way control valve, the second bottom surface is provided with an air inlet pipeline, the air inlet pipeline passes through the first bottom surface of the inner tube and the top of the outer tube and is connected to an external gas source pipeline, the second bottom surface is also provided with a gas distributor, the gas distributor is connected with the second bottom surface, the inner tube is filled with a packing layer, the packing layer is filled above the second bottom surface, the bottom of the outer tube is filled with water, and the water level is higher than the tube wall of the inner tube.

[0006] Furthermore, a liquid distributor is provided between the first bottom surface and the second bottom surface of the inner cylinder.

[0007] Furthermore, the liquid distributor is an overflow type liquid distributor.

[0008] Furthermore, the liquid distributor is a circular hole overflow type liquid distributor.

[0009] Furthermore, the water supply pipeline is provided with a water supply pipeline pump.

[0010] Furthermore, the filler of the packing layer is plastic random packing, ceramic random packing or metal random packing.

[0011] Furthermore, the packing of the packing layer is stainless steel random packing.

[0012] Furthermore, a temperature sensor is provided in the gap between the inner tube and the outer tube, and a heating component is provided in the water body at the bottom of the outer tube.

[0013] Furthermore, the fuel cell gas humidification system further comprises a temperature controller (11), and the temperature sensor (8) is communicatively connected to the temperature controller (11).

[0014] Furthermore, a liquid level meter (14) and a water level controller (13) are provided in the gap between the inner tube (1) and the outer tube (2), and the liquid level meter (14) and the water supply pipeline pump (12) are communicatively connected with the water level controller (13).

[0015] Compared with the prior art, the present invention provides a fuel cell gas humidification system with the following beneficial effects:

[0016] First, the packing layer of the utility model can improve the mass and heat transfer efficiency between water and gas, ensuring the gas humidification effect, thereby ensuring that the proton membrane is in a suitable hydration state, maintaining high electrical conductivity and enabling stable and efficient operation of the fuel cell. Second, the heating and temperature control of the utility model can ensure stable gas temperature, thereby maintaining gas humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the fuel cell gas humidification system;

[0018] Figure 2 This is a structural diagram of the outer cylinder and ancillary facilities of the fuel cell gas humidification system.

[0019] In the figure: 1. Inner tube, 2. Outer tube, 3. Air inlet pipe, 4. Air outlet pipe, 5. Water supply pipe, 6. Liquid distributor, 7. Water tank, 8. Temperature sensor, 9. Packing layer, 10. Gas distributor, 11. Temperature controller, 12. Water supply pipe pump, 13. Water level controller, 14. Liquid level gauge, 15. Heating component, 16. First bottom surface, 17. Second bottom surface, 18. Opening, 19. One-way control valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-2 , the utility model provides a technical solution:

[0022] A fuel cell gas humidification system includes: an inner tube 1 and an outer tube 2, wherein the outer tube 2 is sleeved outside the inner tube 1, and there is a gap between the inner tube 1 and the outer tube 2. The outer tube 2 is a closed cylinder.

[0023] One end of the inner tube 1 is provided with a first bottom surface 16, and the middle of the inner tube 1 wall is provided with a second bottom surface 17. The first bottom surface 16 is sealed with the wall of the outer tube 2, and the other end of the inner tube 1 is open.

[0024] The first bottom surface 16 is provided with a water supply pipeline 5 and an air outlet pipeline 4. The water supply pipeline 5 and the air outlet pipeline 4 pass through the wall of the outer tube 2 and are sealed with the wall of the outer tube 2. The water supply pipeline 5 is provided with a one-way control valve 19.

[0025] The second bottom surface 17 is provided with an air inlet pipeline 3, which passes through the first bottom surface 16 of the inner tube 1 and the top of the outer tube 2 and is connected to the external gas source pipeline. The second bottom surface 17 is also provided with a gas distributor 10, which is connected to the second bottom surface 17.

[0026] The inner cylinder 1 is filled with a packing layer 9 , which is filled on the second bottom surface 17 . The bottom of the outer cylinder is filled with water, and the liquid level of the water is higher than the cylinder wall of the inner cylinder 1 .

[0027] When the fuel cell gas humidification system is in operation, the gas enters the second bottom surface through the air inlet pipe 3, into the space enclosed by the wall of the inner tube 1 and the water surface, and then enters the packing layer 9 from bottom to top through the gas distributor 10, while the water enters the packing layer 9 from top to bottom through the water supply pipe 5. The gas and water conduct sufficient mass and heat transfer on the packing surface, thereby achieving the purpose of gas humidification.

[0028] As a preferred embodiment, in the fuel cell gas humidification system, a liquid distributor 6 is provided between the first bottom surface 16 and the second bottom surface 17 of the inner cylinder 1 .

[0029] Preferably, the liquid distributor is an overflow type liquid distributor.

[0030] When the fuel cell gas humidification system is running, the gas enters the second bottom surface through the air inlet pipe 3, into the space surrounded by the wall of the inner tube 1 and the water surface, and then enters the packing layer 9 from bottom to top through the gas distributor. The water enters the liquid distributor 6 through the water supply pipe 5, and is then distributed through the liquid distributor. Finally, the water enters the packing layer 9 from top to bottom. The gas and water conduct sufficient mass and heat transfer on the packing surface, thereby achieving the purpose of gas humidification more efficiently.

[0031] As a preferred embodiment, in order to better achieve mass transfer and heat transfer, water replenishment and temperature control pipelines are added to the outside of the fuel cell gas humidification system.

[0032] Preferably, a temperature sensor 8 is provided in the gap between the inner tube 1 and the outer tube 2 , and a heating component 15 is provided in the water body at the bottom of the outer tube 2 . The temperature sensor 8 and the heating component 15 are controlled and adjusted by a temperature controller 11 .

[0033] Preferably, a liquid level gauge 14 is provided in the gap between the inner tube 1 and the outer tube 2 . The liquid level gauge 14 is used to transmit the water level signal at the bottom of the outer tube 2 to the water level controller 13 . The liquid level gauge 14 and the water supply pipeline pump 12 are controlled and regulated by the water level controller 13 .

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel cell gas humidification system, characterized in that: include: An inner cylinder (1) and an outer cylinder (2), wherein the outer cylinder (2) is sleeved outside the inner cylinder (1), a gap is provided between the cylinder walls of the inner cylinder (1) and the outer cylinder (2), and the outer cylinder (2) is a closed cylinder; A first bottom surface (16) is provided at one end of the inner tube (1), a second bottom surface (17) is provided in the middle of the inner tube (1) wall, the first bottom surface (16) is sealedly connected to the outer tube (2) wall, and the other end of the inner tube (1) is open; The first bottom surface (16) is provided with a water supply pipeline (5) and an air outlet pipeline (4), the water supply pipeline (5) and the air outlet pipeline (4) penetrate the wall of the outer cylinder (2) and are sealed with the wall of the outer cylinder (2), and the water supply pipeline (5) is provided with a one-way control valve (19); The second bottom surface (17) is provided with an air inlet pipeline (3), which passes through the first bottom surface (16) of the inner tube (1) and the top of the outer tube (2) and is connected to an external air source pipeline. The second bottom surface (17) is also provided with a gas distributor (10), which is connected to the second bottom surface (17). The inner cylinder (1) is filled with a packing layer (9), which is filled on the second bottom surface (17). The bottom of the outer cylinder is filled with water, and the liquid level of the water is higher than the cylinder wall of the inner cylinder (1).

2. The fuel cell gas humidification system according to claim 1, characterized in that: A liquid distributor (6) is provided between the first bottom surface (16) and the second bottom surface (17) of the inner cylinder (1).

3. The fuel cell gas humidification system according to claim 2, characterized in that: The liquid distributor (6) is an overflow type liquid distributor.

4. The fuel cell gas humidification system according to claim 3, characterized in that: The liquid distributor (6) is a circular hole overflow type liquid distributor.

5. The fuel cell gas humidification system according to claim 1, characterized in that: The water supply pipeline (5) is provided with a water supply pipeline pump (12).

6. The fuel cell gas humidification system according to claim 1, characterized in that: The filler of the packing layer (9) is a plastic random packing, a ceramic random packing or a metal random packing.

7. The fuel cell gas humidification system according to claim 6, characterized in that: The packing of the packing layer (9) is stainless steel random packing.

8. The fuel cell gas humidification system according to any one of claims 1 to 7, characterized in that: A temperature sensor (8) is provided in the gap between the inner cylinder (1) and the outer cylinder (2), and a heating component (15) is provided in the water body at the bottom of the outer cylinder (2).

9. The fuel cell gas humidification system according to claim 8, characterized in that: The device further comprises a temperature controller (11), and the temperature sensor (8) is communicatively connected to the temperature controller (11).

10. The fuel cell gas humidification system according to any one of claims 1 to 7, characterized in that: A liquid level meter (14) and a water level controller (13) are provided in the gap between the inner cylinder (1) and the outer cylinder (2); the liquid level meter (14) and the water supply pipeline pump (12) are communicatively connected with the water level controller (13).

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