Anode circulation supply system of fuel cell

Abstract

The utility model discloses an anode circulation supply system of a fuel cell. The anode circulation supply system comprises a water distribution shell, a gas auxiliary liquefaction part and a control assembly, wherein the water distribution shell is used for collecting liquefied water vapor in mixed hydrogen; the gas auxiliary liquefaction part is arranged in the water distribution shell; a closed cavity is formed in the split shell; wherein the gas-assisted liquefaction part is positioned in the middle of the sealing cavity; the control assembly comprises a valve terminal connected with the water distribution shell, the control assembly is arranged on one side of the valve terminal, and a flow channel part is arranged in the valve terminal. The utility model belongs to the technical field of fuel cells, and particularly relates to an anode circulating supply system of a fuel cell. By means of the integrated design, the volume of the product can be effectively reduced, meanwhile, the mixing section, the diffusion section and the output section are arranged, the temperature near the diffusion section can be effectively reduced by means of the principle that hydrogen gas absorbs heat through pressure reduction and expansion, then water vapor in the closed cavity is liquefied, and gas-liquid separation is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel cells, and specifically refers to an anode circulation supply system of a fuel cell. Background Art

[0002] Hydrogen fuel cells are generally considered to be one of the important trends in the development of new energy vehicles in the future due to their advantages such as high efficiency, high power density and zero emissions. However, during the power generation process of the fuel cell stack, the water generated by the reaction will be carried out by the hydrogen-containing mixed gas, resulting in a high water vapor content and high humidity in the hydrogen-containing mixed gas. Before these hydrogen-containing mixed gases enter the ejector, the water vapor needs to be separated.

[0003] At present, a gas-water separator is generally used to separate water vapor. At present, the gas-water separator and the ejector are generally set separately, and the two are connected by a pipeline. However, the above structure has the following problems: the transmission distance is long, loss will occur during the transmission process, the boosting efficiency is reduced, the pipeline connection is complicated, the installation efficiency is low, the volume is large, the cavity is large, and it is not easy to install and use in some areas with small cavities.

[0004] Patent No. CN202122154266.X proposes an integrated structure of an air-water separator and an ejector. This patent proposes an integrated structure to address the above-mentioned split setting problem. Through an integrated shell, the integrated shell includes an ejector shell and a separator shell, thereby installing the ejector and the separator in one body.

[0005] However, the above patent structure only integrates the ejector and the separator in one shell, but does not take into account that during the use of the water separator, since the internal temperature of the water separator is often higher than the liquefaction temperature of water vapor, the separation efficiency is not high if it only relies on gravity to separate water and gas. Utility Model Content

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an anode circulation supply system for a fuel cell. Through the integrated design of the water divider and the ejector, the volume of the product can be effectively reduced. At the same time, the ejector is provided with a mixing section, a diffusion section and an output section. By utilizing the principle of heat absorption due to decompression and expansion of hydrogen gas, the temperature near the diffusion section can be effectively reduced, and the water vapor in the closed cavity can be liquefied to achieve gas-liquid separation.

[0007] The technical solution adopted by the utility model is as follows:

[0008] The utility model provides an anode circulation supply system for a fuel cell, comprising a water separation shell for collecting liquefied water vapor in mixed hydrogen, characterized in that it comprises a gas-assisted liquefaction part arranged in the water separation shell, and a control component arranged on the water separation shell;

[0009] The split housing is provided with a closed cavity;

[0010] The gas-assisted liquefaction part is located in the middle of the sealed cavity, and is used to assist the liquefaction of water vapor in the sealed cavity, and is also used for the injection of hydrogen;

[0011] The control component comprises a valve island connected to the water diversion housing, a control component is installed on one side of the valve island, and a flow channel is arranged inside the valve island.

[0012] Furthermore, the control component also includes a tail exhaust valve arranged on the valve island, a proportional valve connected to the valve island, and a hydrogen inlet valve connected to the valve island.

[0013] Furthermore, the gas-assisted liquefaction section includes a mixing section, a diffusion section and an output section; one end of the mixing section is connected to the proportional valve, and the mixing section is designed in a conical shape; one end of the diffusion section is connected to the end of the mixing section, and the diffusion section is designed in a cylindrical structure; the output section is connected to the diffusion section, and the output section is designed in a conical structure.

[0014] Furthermore, the water separation housing is provided with a second hydrogen inlet and a second hydrogen outlet, the second hydrogen inlet is connected to the closed cavity, and the second hydrogen outlet is connected to the output section.

[0015] Furthermore, a first hydrogen outlet is provided on one side of the valve island, a first hydrogen inlet is provided on the other side of the valve island, and a flow channel portion is provided inside the valve island.

[0016] Further, the flow channel portion includes a first flow channel, a second flow channel, a third flow channel and a fourth flow channel, and the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are connected to each other; an intake valve is connected between the first flow channel and the second flow channel; the intake valve is located between the first flow channel and the second flow channel, the proportional valve is located between the second flow channel and the third flow channel, the tail exhaust valve is located between the third flow channel and the fourth flow channel, the first flow channel is connected to the first hydrogen inlet, and the fourth flow channel is connected to the first hydrogen outlet.

[0017] Furthermore, the tapered angle of the mixing section wall is in the range of 20°-30°, and the tapered angle of the output section wall is in the range of 20°-30°.

[0018] The beneficial effects achieved by the utility model using the above structure are as follows:

[0019] (1) The present invention provides an anode circulation supply system for a fuel cell. The ejector and the water separator are designed in an integrated manner. The water separator itself liquefies water vapor to complete the gas-liquid separation of hydrogen and water vapor. At the same time, the principle of heat absorption during gas decompression and expansion is utilized to further control and reduce the contact temperature of the mixed gas, thereby further improving the gas-liquid separation efficiency.

[0020] (2) The present invention provides an anode circulation supply system for a fuel cell. By designing a tail exhaust valve, a proportional valve and a hydrogen inlet valve, the inlet valve and the tail exhaust valve can effectively regulate the inlet and outlet of hydrogen, and the proportional valve can effectively regulate the flow of hydrogen entering the ejector, thereby controlling the volume of hydrogen and thus the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the main structure of an anode circulation supply system for a fuel cell provided by the utility model;

[0022] Figure 2 A schematic diagram of the internal structure of an ejector of an anode circulation supply system of a fuel cell provided by the utility model;

[0023] Figure 3 This is a schematic diagram of the internal connection between the valve island and the ejector provided by the utility model.

[0024] Among them, 1. water separation shell, 101. first hydrogen inlet, 102. first hydrogen outlet, 2. gas-assisted liquefaction part, 201. mixing section, 202. diffusion section, 203. output section, 204. contact hole, 3. control component, 301. electrical interface, 302. tail exhaust valve, 303. proportional valve, 304. hydrogen inlet valve, 401. second hydrogen inlet, 402. second hydrogen outlet, 403. first flow channel, 404. second flow channel, 405. third flow channel, 406. fourth flow channel, 5. valve island.

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Specific embodiment:

[0028] like Figure 1 and Figure 2 As shown, the utility model provides an anode circulation supply system for a fuel cell.

[0029] It comprises a water separation shell 1 for collecting liquefied water vapor in mixed hydrogen, characterized in that it comprises a gas-assisted liquefaction part 2 arranged in the water separation shell 1, and a control component 3 arranged on the water separation shell 1;

[0030] The water separation housing 1 is provided with a closed cavity;

[0031] The gas-assisted liquefaction part 2 is located in the middle of the sealed cavity, and is used to assist the liquefaction of water vapor in the sealed cavity. The gas-assisted liquefaction part 2 is also used for the injection of hydrogen.

[0032] The control assembly 3 includes a valve island 5 connected to the water diversion housing 1 , the control assembly 3 is installed on one side of the valve island 5 , and a flow channel is provided inside the valve island 5 .

[0033] like Figure 1 and Figure 2 As shown, the utility model provides an anode circulation supply system for a fuel cell, wherein the control component 3 also includes a tail exhaust valve 302 arranged on the valve island 5, a proportional valve 303 connected to the valve island 5, and a hydrogen inlet valve 304 connected to the valve island 5.

[0034] like Figure 1 and Figure 2 As shown, the utility model provides an anode circulation supply system for a fuel cell, wherein the gas-assisted liquefaction section 2 includes a mixing section 201, a diffusion section 202 and an output section 203;

[0035] One end of the mixing section 201 is connected to the proportional valve 303, and the mixing section 201 is designed in a conical shape;

[0036] One end of the diffusion section 202 is connected to the end of the mixing section 201, and the diffusion section 202 is designed as a cylindrical structure;

[0037] The output section 203 is connected to the diffuser section 202 , and the output section 203 is designed to be a conical structure.

[0038] like Figure 1 and Figure 2 As shown, the utility model provides an anode circulation supply system for a fuel cell, wherein the water separation shell 1 is further provided with a first hydrogen inlet 101 and a first hydrogen outlet 102 , wherein the first hydrogen inlet 101 is connected to the closed cavity, and the first hydrogen outlet 102 is connected to the output section 203 .

[0039] like Figure 1 and Figure 2 As shown, the utility model provides an anode circulation supply system for a fuel cell, wherein a second hydrogen outlet 402 is provided on one side of the valve island, a second hydrogen inlet 401 is provided on the other side of the valve island, and a flow channel portion is provided inside the valve island 5.

[0040] like Figure 1 and Figure 2 As shown, the utility model provides an anode circulation supply system for a fuel cell, wherein the flow channel portion includes a first flow channel 403, a second flow channel 404, a third flow channel 405 and a fourth flow channel 406, and the first flow channel 403, the second flow channel 404, the third flow channel 405 and the fourth flow channel 406 are connected;

[0041] A hydrogen inlet valve 304 is connected between the first flow channel 403 and the second flow channel 404 .

[0042] The hydrogen inlet valve 304 is located between the first flow channel 403 and the second flow channel 404, the proportional valve 303 is located between the second flow channel 404 and the third flow channel 405, the tail exhaust valve 302 is located between the third flow channel 405 and the fourth flow channel 406, the first flow channel 403 is connected to the first hydrogen inlet 101, and the fourth flow channel 406 is connected to the first hydrogen outlet 102.

[0043] like Figure 1 and Figure 2 As shown, the utility model provides an anode circulation supply system for a fuel cell, wherein the conical angle range of the mixing section surface wall is 20°-30°, and the conical angle range of the output section surface wall is 20°-30°.

[0044] Working principle:

[0045] Stage 1: At this time, the hydrogen inlet valve 304 is open, the proportional valve 303 is in a closed state, and the tail exhaust valve 302 is in a closed state. Hydrogen enters the first flow channel 403 from the second hydrogen inlet 401 and enters the second flow channel 404 through the hydrogen inlet valve 304. The electrical interface 301 provides power to the hydrogen inlet valve 304, the proportional valve 303 and the tail exhaust valve 302.

[0046] The second stage: At this time, the hydrogen inlet valve 304 is opened, the proportional valve 303 is in an open state, and the tail exhaust valve 302 is in a closed state. The hydrogen enters the mixing section 201 from the second flow channel 404 through the proportional valve 303. At the same time, the proportional valve 303 can adjust the flow rate of hydrogen entering the mixing section 201. The hydrogen then passes into the mixing section 201, the diffusion section 202 and the output section 203, and is output through the first hydrogen outlet 102. The hydrogen is then injected into the fuel cell.

[0047] The third stage: at this time, the hydrogen inlet valve 304 is closed, the proportional valve 303 is closed, and the tail valve 302 is in an open state. The hydrogen flows out through the third flow channel 405, the tail valve 302, the fourth flow channel 406 and the second hydrogen outlet 402. The hydrogen that has not reacted completely in the fuel cell enters the water separation shell 1 through the first hydrogen inlet 101.

[0048] The fourth stage: At this time, the unreacted hydrogen enters the water-dividing shell 1 through the first hydrogen inlet 101. Since the diameter of the connection between the mixing section and the diffusion section is smaller than the diameter of the diffusion section, the hydrogen enters the diffusion section 202. The cross-sectional diameters at different locations in the mixing section 201 are smaller than the cross-sectional diameters in the diffusion section 202, and the cross-sectional diameters at different locations in the diffusion section 202 are smaller than the cross-sectional diameters at different locations in the output section 203. The hydrogen enters the diffusion section 202 from the mixing section 201, and the volume of the hydrogen increases, and then expands and absorbs heat. At the same time, the contact hole 204 is provided on the outside of the diffusion section 202, which can contact the hydrogen in the sealed cavity. Then, under the action of the colder surface of the diffusion section 202, the water vapor in the hydrogen is further liquefied, completing the whole process.

[0049] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An anode circulation supply system for a fuel cell, comprising a water separation shell for collecting liquefied water vapor in mixed hydrogen, characterized in that: It includes a gas-assisted liquefaction part arranged in the water-dividing shell and a control component arranged on the water-dividing shell; a closed cavity is arranged on the water-dividing shell; wherein the gas-assisted liquefaction part is located in the middle of the sealed cavity, the gas-assisted liquefaction part is used to assist the liquefaction of water vapor in the closed cavity, and the gas-assisted liquefaction part is also used for the injection of hydrogen; the control component includes a valve island connected to the water-dividing shell, a control component is installed on one side of the valve island, and a flow channel part is arranged in the valve island.

2. The anode circulation supply system of a fuel cell according to claim 1, characterized in that: The control component also includes a tail exhaust valve arranged on the valve island, a proportional valve connected to the valve island, and a hydrogen inlet valve connected to the valve island.

3. The anode circulation supply system of a fuel cell according to claim 2, characterized in that: The gas-assisted liquefaction section includes a mixing section, a diffusion section and an output section; one end of the mixing section is connected to the proportional valve, and the mixing section is designed in a conical shape; one end of the diffusion section is connected to the end of the mixing section, and the diffusion section is designed in a cylindrical structure, and contact holes are provided on the upper and lower sides of the diffusion section; the output section is connected to the diffusion section, and the output section is designed in a conical structure.

4. The anode circulation supply system of a fuel cell according to claim 3, characterized in that: The water separation shell is also provided with a first hydrogen inlet and a first hydrogen outlet, the second hydrogen inlet is connected to the closed cavity, and the first hydrogen outlet is connected to the output section; a second hydrogen outlet is provided on one side of the valve island, and a second hydrogen inlet is provided on the other side of the valve island, and a flow channel portion is provided in the valve island.

5. The anode circulation supply system of a fuel cell according to claim 4, characterized in that: The flow channel portion includes a first flow channel, a second flow channel, a third flow channel and a fourth flow channel, and the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are connected to each other; an intake valve is connected between the first flow channel and the second flow channel; the intake valve is located between the first flow channel and the second flow channel, the proportional valve is located between the second flow channel and the third flow channel, the tail exhaust valve is located between the third flow channel and the fourth flow channel, the first flow channel is connected to the first hydrogen inlet, and the fourth flow channel is connected to the first hydrogen outlet.

6. The anode circulation supply system of a fuel cell according to claim 5, characterized in that: The conical angle range of the mixing section surface wall is 20°-30°, and the conical angle range of the output section surface wall is 20°-30°.

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