Fuel cell catalyst slurry dispersion device and catalyst slurry delivery system

Abstract

This invention relates to the field of fuel cell manufacturing technology, and provides a fuel cell catalyst slurry dispersion device and a catalyst slurry delivery system. The fuel cell catalyst slurry dispersion device is characterized by comprising: a vibration mechanism capable of generating vibration; a guide wire, the first end of which is connected to the vibration mechanism; and a delivery pipe filled with catalyst slurry, with the guide wire positioned along the length of the delivery pipe, capable of transmitting the vibration generated by the vibration mechanism to the catalyst slurry within the delivery pipe. The fuel cell catalyst slurry dispersion device and catalyst slurry delivery system provided by this invention, through the vibration mechanism and guide wire, stir and disperse the catalyst slurry within the delivery pipe, preventing catalyst slurry agglomeration even when transported in a long, large-diameter delivery pipe, thereby improving the activity of the catalyst slurry.

Description

Technical Field

[0001] This invention relates to the field of fuel cell manufacturing technology, and in particular to a fuel cell catalyst slurry dispersion device and a catalyst slurry delivery system. Background Technology

[0002] Hydrogen energy, as a new generation of clean and efficient energy storage, is receiving increasing attention in the energy sector. Proton exchange membrane fuel cells (PEMFCs) are one of the important means of converting hydrogen energy into electrical energy. After uniformly coating the surface of the PEMFC with a catalyst layer such as platinum-carbon material, hydrogen gas can be ionized to release electrons, thereby achieving the conversion of hydrogen energy into electrical energy. Therefore, the PEMFC with a catalyst coating is also known as the fuel cell membrane electrode assembly (MEA), a core component of the fuel cell. Simultaneously, this method can also be reversed and applied to water electrolysis to produce hydrogen, becoming a key component in hydrogen production. In the MEA coating process, nano-sized noble metal catalyst particles and carbon powder particles are typically dispersed in organic solvents such as isopropanol and ethanol to prepare a catalyst suspension slurry. Since catalyst powder particles easily settle or agglomerate into large particles in solvents, the catalyst slurry needs to be continuously stirred and dispersed to avoid this phenomenon. During the coating process, such as spray coating, the catalyst slurry should also remain uniformly dispersed as it is stably delivered to the nozzle. Existing technologies typically treat the slurry storage tank and supply pump using magnetic stirring or ultrasonic dispersion. However, because catalyst slurries are highly temperature-sensitive, higher temperatures increase the likelihood of catalyst particle agglomeration and bubble formation, severely impacting the catalyst coating process. Therefore, it is generally necessary to maintain a low-temperature environment (below 25°C) during catalyst coating. However, the aforementioned magnetic stirring or ultrasonic dispersion processes generate heat, leading to catalyst slurry agglomeration. Thus, sometimes using stirring and dispersion devices can actually exacerbate agglomeration due to the increased heat, a contradiction that has consistently hindered the production of fuel cell membrane electrode assemblies (MEAs).

[0003] In the aforementioned magnetic stirring and ultrasonic dispersion technologies, only the catalyst slurry tank or supply pump is dispersed and stirred. However, it is difficult to achieve dispersion and stirring in the delivery pipe that transports the slurry. Furthermore, catalyst particles are more prone to agglomeration in the narrow space of the delivery pipe. As the production scale of fuel cell membrane electrode assemblies (MEAs) expands, the size of the coating equipment also increases. This leads to increasingly longer delivery pipes from the tank to the supply pump and from the supply pump to the coating device (such as a nozzle), exacerbating the agglomeration problem in the delivery pipe section and severely impacting the catalytic effect. Summary of the Invention

[0004] This invention provides a fuel cell catalyst slurry dispersion device and a catalyst slurry delivery system to solve the defect in the prior art where the catalyst slurry is prone to agglomeration in the delivery pipe, which affects the catalytic effect.

[0005] This invention provides a fuel cell catalyst slurry dispersion device, comprising:

[0006] A vibration mechanism capable of generating vibration;

[0007] A guide wire, the first end of which is connected to the vibration mechanism;

[0008] An infusion tube is filled with catalyst slurry, and a guide wire is disposed inside the infusion tube along its length. The guide wire can transmit the vibration generated by the vibration mechanism to the catalyst slurry inside the infusion tube.

[0009] According to the present invention, a fuel cell catalyst slurry dispersion device is provided, wherein the vibration mechanism comprises:

[0010] An ultrasonic transducer capable of emitting ultrasonic waves;

[0011] A vibrating rod, the first end of which is connected to the ultrasonic transducer, and the second end of which is connected to the first end of the guidewire, for transmitting the ultrasonic waves generated by the ultrasonic transducer to the guidewire.

[0012] According to the present invention, a fuel cell catalyst slurry dispersion device is provided, wherein the second end of the vibrating rod is connected to the first end of the guide wire by welding.

[0013] According to the present invention, a fuel cell catalyst slurry dispersion device further includes: a first connecting part, a second connecting part provided at the second end of the vibrating rod, the second connecting part being adapted to be detachably connected to the first connecting part, and the first connecting part being fixedly connected to the first end of the guide wire.

[0014] According to the present invention, a fuel cell catalyst slurry dispersion device is provided, wherein the first connecting portion includes:

[0015] A fixing plate, wherein the fixing plate is fixedly connected to the first end of the guide wire;

[0016] The first nut is used to press and fix the fixing plate to the first nut.

[0017] The second connecting part includes: a first threaded part, which is detachably connected to the first nut.

[0018] According to the present invention, a fuel cell catalyst slurry dispersion device is provided, wherein the first connecting part includes: a second nut, one end of the second nut having an engagement part, the engagement part being engaged with the first end of the guide wire;

[0019] The second connecting part includes a second threaded part, which is detachably connected to the second nut.

[0020] According to the present invention, a fuel cell catalyst slurry dispersion device is provided, wherein the engagement part includes a conical structure, the conical structure being composed of a plurality of notches arranged circumferentially around the axis of the second nut, and the plurality of notches being engaged and connected to the first end of the guide wire.

[0021] A fuel cell catalyst slurry dispersion device according to the present invention further includes:

[0022] A first enclosure, which is used to enclose the ultrasonic transducer;

[0023] A second cover, connected to the first cover, is used to encapsulate the vibrating rod through a seal.

[0024] A fuel cell catalyst slurry dispersion device according to the present invention further includes:

[0025] A pipe connector, the first end of which is connected to the vibration mechanism;

[0026] A tee connector, comprising a first connector, a second connector, and a third connector that are interconnected;

[0027] The infusion tubing includes:

[0028] A first infusion tube, wherein a first end of the first infusion tube is connected to a second end of the tubing connector, and the second end of the first infusion tube is connected to the first connector;

[0029] The second infusion tube is connected to the second connector;

[0030] The third infusion tube is connected to the third connector.

[0031] The present invention also provides a catalyst slurry conveying system, comprising:

[0032] The material hopper is equipped with a first temperature control device;

[0033] The sample injector is equipped with a second temperature control device;

[0034] nozzle;

[0035] The present invention provides a fuel cell catalyst slurry dispersion device, wherein the fuel cell catalyst slurry dispersion device is connected between the material tank and the injector and / or between the injector and the nozzle.

[0036] The present invention provides a fuel cell catalyst slurry dispersion device, which generates vibration through a vibration mechanism and transmits the vibration to the catalyst slurry in the delivery pipe through a guide wire, so that the catalyst slurry inside the delivery pipe can be stirred and dispersed. Even if the catalyst slurry is transported in a long and large diameter delivery pipe, the agglomeration of the catalyst slurry can be avoided, thereby improving the activity of the catalyst slurry.

[0037] The catalyst slurry conveying system provided by the present invention not only achieves the stirring and dispersion of the catalyst slurry in the pipeline, avoiding its agglomeration due to sedimentation, but also cools the catalyst slurry through a first temperature control device and a second temperature control device, avoiding its agglomeration due to temperature rise. Thus, it solves the problem of catalyst slurry agglomeration during the conveying process in two aspects. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of the material bucket and the first temperature control device provided by the present invention in the first outer shell;

[0040] Figure 2 This is a schematic diagram of the structure of the material barrel and the first cooling chamber provided by the present invention;

[0041] Figure 3 This is a first-view structural schematic diagram of the first outer shell provided by the present invention;

[0042] Figure 4 This is a second-view structural schematic diagram of the first outer shell provided by the present invention;

[0043] Figure 5 This is a schematic diagram of the structure of the first temperature control device provided by the present invention;

[0044] Figure 6 This is a schematic diagram of the stirring mechanism provided by the present invention;

[0045] Figure 7 This is a schematic diagram of the structure of the sampler and the second temperature control device provided by the present invention in the second housing.

[0046] Figure 8 This is a schematic diagram of the structure of the second outer shell provided by the present invention;

[0047] Figure 9This is a schematic diagram of the structure of the second temperature control device provided by the present invention;

[0048] Figure 10 This is a first-view internal structure diagram of the sample injector provided by the present invention;

[0049] Figure 11 This is a schematic diagram of the internal structure of the sample injector provided by the present invention from a second perspective;

[0050] Figure 12 yes Figure 11 A schematic diagram of the structure of part A in the middle;

[0051] Figure 13 This is a schematic diagram of the structure of the fuel cell catalyst slurry dispersion device provided by the present invention;

[0052] Figure 14 This is a schematic diagram of the structure provided by the present invention, showing the vibration rod and guide wire connected by welding.

[0053] Figure 15 yes Figure 14 A schematic diagram of the structure of part B in the middle;

[0054] Figure 16 This is a schematic diagram of the structure provided by the present invention, showing the vibration rod and guide wire connected by a first type of thread;

[0055] Figure 17 yes Figure 16 A schematic diagram of the structure of part C in the middle;

[0056] Figure 18 This is a schematic diagram of the structure provided by the present invention, showing the vibration rod and guide wire connected by a second type of thread;

[0057] Figure 19 yes Figure 18 A schematic diagram of the structure of part D in the middle;

[0058] Figure 20 This is a schematic diagram of the structure of the second nut provided by the present invention;

[0059] Figure 21 This is a schematic diagram of the catalyst slurry conveying system provided by the present invention.

[0060] Figure label:

[0061] 1: Material tank; 2: First temperature control device; 201: First cooling chip; 202: First cold end fan; 203: First hot end fan; 204: First hot end heat sink; 205: First cold end heat sink; 3: Sample injector; 301: First ultrasonic transducer; 302: Vibrating diaphragm; 303: Disc; 304: Adjusting ring; 310: Syringe; 311: Piston cylinder; 312: Injection barrel; 313: First housing; 314: Second housing; 315: Third housing; 316: Piston cap; 317: Washer; 318: Pressure ring; 4: Second temperature control device; 401: Second cooling chip; 402: Second cold end fan; 403: Second hot end fan; 404: Second hot end heat sink; 405: Second cold end heat sink; 5: Stirring mechanism ; 501: Motor; 502: Stirrer guide seat; 503: Stirrer; 6: First outer shell; 601: Heat insulation plate; 602: Sealing strip; 603: First condensate chamber; 604: First cooling chamber; 7: Second outer shell; 701: Second condensate chamber; 702: Second cooling chamber; 8: First temperature sensor; 9: Temperature controller; 10: Nozzle; 11: Second ultrasonic transducer; 12: Vibrating rod; 13: Guide wire; 14: Fixing plate; 15: First nut; 16: Second nut; 161: Engaging part; 17: First cover; 18: Second cover; 19: Pipe joint; 20: T-joint; 21: First infusion pipe; 22: Second infusion pipe; 23: Third infusion pipe; 100: Fuel cell catalyst slurry dispersion device. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0063] The following is combined with Figures 1-12 This invention describes a fuel cell catalyst slurry cooling device. The fuel cell catalyst slurry cooling device includes: a tank 1, a stirring mechanism 5, a first temperature control device 2, a sampler 3, and a second temperature control device 4.

[0064] The material tank 1 is used to hold the catalyst slurry; the first temperature control device 2 is used to adjust the temperature of the material tank 1; the sample injector 3 is connected to the material tank 1; and the second temperature control device 4 is used to adjust the temperature of the sample injector 3.

[0065] Specifically, the catalyst slurry is stirred and dispersed in a tank 1, and the temperature of the tank 1 is regulated by a first temperature control device 2. The stirred and dispersed catalyst slurry is further dispersed by a fuel cell catalyst slurry dispersion device 100 (described in detail in the embodiments below), and then sprayed onto the surface through an injector 3 and a nozzle 10. During this process, the temperature of the injector 3 is regulated by a second temperature control device 4. Generally, since the catalyst slurry generates heat during stirring and dispersion, and the coating process needs to be carried out at a low temperature, the first temperature control device 2 and the second temperature control device 4 employ refrigeration devices to cool the catalyst slurry, maintaining it at a constant temperature of 25°C.

[0066] Preferably, the material tank and the sampler 3 are adjacent to each other and are jointly installed on the Z-axis module of the spraying system. This can significantly shorten the length of both the inlet and outlet pipes of the sampler 3, reducing the risk of catalyst slurry agglomeration in the liquid pipes. Furthermore, the shortened pipes reduce the pressure for pumping and pushing the liquid, avoiding the problem of air bubbles forming in the liquid pipes due to sealing issues.

[0067] The present invention provides a fuel cell catalyst slurry cooling device, which regulates the temperature of the material tank 1 by setting a first temperature control device 2 and regulates the temperature of the sampler 3 by setting a second temperature control device 4, thereby ensuring that the catalyst slurry is stirred, dispersed, transported and coated at a suitable temperature, avoiding the problem of accelerated agglomeration and bubble generation of the catalyst slurry due to temperature rise, thereby improving the activity of the catalyst slurry.

[0068] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: a stirring mechanism 5, wherein the stirrer 503 of the stirring mechanism 5 is disposed inside the material tank 1 for stirring and dispersing the catalyst slurry inside the material tank 1. Figure 6 As shown, the stirring mechanism 5 in this embodiment uses a magnetic stirring assembly, which is located below the material tank 1. Specifically, the stirring mechanism 5 includes: a stirring motor 501, a stirring guide seat 502, and a stirring element 503. The stirring motor 501 drives the stirring guide seat 502 to rotate. Due to the magnetic effect between the stirring guide seat 502 and the stirring element 503, the stirring element 503 also rotates. When the stirring element 503 is placed into the material tank 1, its rotation stirs and disperses the catalyst slurry in the material tank 1. Of course, other stirring devices can be used instead of the magnetic stirring assembly as needed, and the present invention is not limited thereto.

[0069] In one embodiment of the present invention, the first temperature control device 2 includes: a first cooling chip 201, a first cold end fan 202 and a first hot end fan 203; the second temperature control device 4 includes: a second cooling chip 401, a second cold end fan 402 and a second hot end fan 403.

[0070] The first cold-end fan 202 is disposed near the first side of the first cooling chip 201, and a first cold-end heat sink 205 is disposed between the first cold-end fan 202 and the first cooling chip 201; the first hot-end fan 203 is disposed near the second side of the first cooling chip 201, and a first hot-end heat sink 204 is disposed between the first hot-end fan 203 and the first cooling chip 201. Specifically, the first cooling chip 201 is a semiconductor cooling chip, with the first cold-end fan 202 mounted on one side via the first cold-end heat sink 205, and the first hot-end fan 203 mounted on the other side via the first hot-end heat sink 204; the first cold-end fan 202 is disposed near the material barrel 1, and the first outer casing 6 forms a first cooling chamber 604 for accommodating the material barrel 1, and the first cold-end fan 202 is used to cool the material barrel 1 in the first cooling chamber 604.

[0071] The second cold-end fan 402 is disposed near the first side of the second cooling chip 401, and a second cold-end heat sink 405 is disposed between the second cold-end fan 402 and the second cooling chip 401; the second hot-end fan 403 is disposed near the second side of the second cooling chip 401, and a second hot-end heat sink 404 is disposed between the second hot-end fan 403 and the second cooling chip 401. Specifically, the second cooling chip 401 is a semiconductor cooling chip, with the second cold-end fan 402 mounted on one side via the second cold-end heat sink 405, and the second hot-end fan 403 mounted on the other side via the second hot-end heat sink 404; the second cold-end fan 402 is disposed near the injector 3 for cooling the injector 3, and the second housing 7 forms a second cooling chamber 702 for accommodating the injector 3, with the second cold-end fan 402 used to cool the injector 3 in the second cooling chamber 702.

[0072] Furthermore, one side of the aforementioned thermoelectric cooler is tightly bonded to the cold-end heat sink via thermally conductive silicone grease, and the other side is tightly bonded to the hot-end heat sink via thermally conductive silicone grease. Each heat sink is equipped with a fan; the cold-end fan blows cold air into the cooling chamber for cooling, that is, into the material tank 1 / injector 3. Using a thermoelectric cooler to cool the material tank 1 and injector 3 achieves a more efficient cooling effect, and is compact. The material tank 1 does not come into contact with a water bath (the usual cooling method for the material tank 1 is placing it in an ice-water bath or circulating water cooling), reducing the inconvenience of needing to replace the material tank 1 due to water seepage on its outer wall. The aforementioned heat sinks are all made of materials with high thermal conductivity, typically aluminum. To prevent hot-end heat dissipation from affecting the cooling effect, the hot-end heat sink is located away from the cold-end heat sink, connected in the middle by a thermally conductive material.

[0073] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes a first outer shell 6 and a second outer shell 7. The first outer shell 6 encloses the first temperature control device 2 and the material container 1, thereby reducing temperature loss; the second outer shell 7 encloses the second temperature control device 4 and the sampler 3, thereby reducing temperature loss. Further, the first outer shell 6 and the second outer shell 7 are respectively provided with an air inlet and an air outlet at the location of the first temperature control device 2 and the location of the second temperature control device 4, respectively, to facilitate heat exchange by the fan; the first outer shell 6 and the second outer shell 7 each have an observation window, which is made of transparent plastic or glass, to facilitate observation of the catalyst slurry in the container; both the first outer shell 6 and the second outer shell 7 are made of materials with poor thermal conductivity, such as plastic.

[0074] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes a heat insulation plate 601 and a sealing strip 602. The heat insulation plate 601 is disposed between the first cooling chip 201 and the first outer casing 6 to isolate the heat exchange spaces of the cold-end fan and the hot-end fan from each other; the sealing strip 602 is disposed at the connection between the first outer casing 6 and the material tank 1. In this embodiment, by providing the heat insulation plate 601, the heat exchange between the left and right sides of the first cooling chip 201 is reduced, thereby reducing heat loss; by providing the sealing strip 602, the loss of cold energy generated by the first temperature control device 2 to the environment is reduced, thereby further reducing heat loss.

[0075] In one embodiment of the present invention, the first outer shell 6 further includes a first condensate chamber 603, which is disposed below the first temperature control device 2; the second outer shell 7 further includes a second condensate chamber 701, which is disposed below the second temperature control device 4. In this embodiment, the first condensate chamber 603 is disposed below the first temperature control device 2 to recover the condensate generated by the first temperature control device 2 and the material tank 1 during cooling; the second condensate chamber 701 is disposed below the second temperature control device 4 to recover the condensate generated by the second temperature control device 4 and the injector 3 during cooling. Further, the first condensate chamber 603 and the second condensate chamber 701 are provided with drain holes and plugs for discharging condensate. Even further, the inner wall of the first outer shell 6 at the material tank 1 position and the inner wall of the second outer shell 7 at the injector 3 position are provided with hydrophobic coatings, allowing condensate to quickly slide into the condensate chambers without adhering to the surfaces.

[0076] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: a first temperature sensor 8, a second temperature sensor (not shown in the figure), and a temperature controller 9. The first temperature sensor 8 is disposed inside the first housing 6 and near the feed tank 1, for monitoring temperature changes in the feed tank 1; the second temperature sensor is disposed inside the second housing 7 and near the injector 3, for monitoring temperature changes in the injector 3; the temperature controller 9 is signal-connected to the first temperature sensor 8, the second temperature sensor, the first temperature control device 2, and the second temperature control device 4, respectively, for receiving temperature data monitored by the first temperature sensor 8 and the second temperature sensor, and adjusting the operating states of the first temperature control device 2 and the second temperature control device 4 according to the temperature data. In this embodiment, the temperature near the feed tank 1 is monitored by the first temperature sensor 8, and the temperature near the injector 3 is monitored by the second temperature sensor, and the monitored temperature data is transmitted to the temperature controller 9. The temperature controller 9 adjusts the operating states of the first temperature control device 2 and the second temperature control device 4 according to the temperature data. Specifically, the temperature controller 9 can adjust the speed of the cold-end fan and the hot-end fan, as well as the current passing through the semiconductor cooling chip.

[0077] In one embodiment of the present invention, the injector 3 includes a first ultrasonic transducer 301, a syringe 310, and a vibrating diaphragm 302. The syringe 310 has an injection chamber for containing catalyst slurry, which is connected to the material tank 1. The ultrasonic transmitting end of the first ultrasonic transducer 301 is connected to the injection chamber via the vibrating diaphragm 302. Specifically, in this embodiment, the first ultrasonic transducer 301 can convert electromagnetic energy into mechanical energy (acoustic energy), and the generated ultrasonic waves are transmitted to the catalyst slurry in the injection chamber through the vibrating diaphragm 302, thus agitating the catalyst slurry through sound wave vibration. In this embodiment, the catalyst slurry in the material tank 1 is fully agitated and dispersed by the stirring mechanism 5, and the catalyst slurry in the syringe 310 can also be ultrasonically agitated by the first ultrasonic transducer 301 and the vibrating diaphragm 302, ensuring that the catalyst slurry in each structure is fully agitated and dispersed, avoiding agglomeration. Preferably, the vibrating diaphragm 302 is made of materials such as stainless steel, titanium alloy, or polymer film.

[0078] Furthermore, the ultrasonic transmitting end of the first ultrasonic transducer 301 is provided with an amplitude transformer, and a disk 303 is provided at the end of the amplitude transformer. The diameter of the disk 303 is larger than the diameter of the amplitude transformer. The first ultrasonic transducer 301 is connected to the vibrating diaphragm 302 through the disk 303. The vibration of the first ultrasonic transducer 301 is amplified by the amplitude transformer, and the disk structure at the top can further amplify the amplitude of the ultrasonic vibration and the radiation area of ​​the ultrasonic vibration.

[0079] The sampler 3 in the above embodiments has the following advantages: 1. The ultrasonic emitting end of the first ultrasonic transducer 301 does not directly contact the catalyst slurry, but transmits it to the catalyst slurry through the vibrating film 302, thus preventing contamination and eliminating dead volume residual liquid; 2. The front end of the first ultrasonic transducer 301 is a large-diameter disk 303, which can increase the amplitude of the first ultrasonic transducer 301 and expand the effective area of ​​ultrasonic radiation; 3. Since the vibrating film 302 can be a non-metallic film, all parts in contact with the liquid are non-metallic, improving corrosion resistance.

[0080] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes an adjusting ring 304, which is adjustablely disposed between the ultrasonic transmitting end of the first ultrasonic transducer 301 and the vibrating film 302, for adjusting the distance between the ultrasonic transmitting end of the first ultrasonic transducer 301 and the vibrating film 302. In this embodiment, the gap between the ultrasonic transmitting end and the vibrating film 302 is adjusted by adjusting the length of the adjusting ring 304, thereby adjusting the amplitude of the vibrating film 302. If the ultrasonic transmitting end and the vibrating film 302 are too loosely fitted, the ultrasonic wave transmission loss will be large; while if the ultrasonic transmitting end and the vibrating film 302 are too tightly fitted, the performance of the ultrasonic transducer will decrease, resulting in a decrease in the vibration effect. Therefore, an appropriate fit is the key to ultrasonic vibration. Preferably, the adjusting ring 304 can adopt a threaded structure, and the size of the gap between the ultrasonic transmitting end (i.e., the disk 303) and the vibrating film 302 can be adjusted by rotating the adjusting ring 304, that is, the tightness between the ultrasonic transmitting end and the vibrating film 302.

[0081] In one embodiment of the present invention, the syringe 310 includes a piston cylinder 311 and an injection cylinder 312, wherein the piston cylinder 311 and the injection cylinder 312 are adapted to be connected, and the space formed between the piston cylinder 311 and the injection cylinder 312 constitutes an injection cavity. The piston cylinder 311 includes a first housing 313, a second housing 314, and a third housing 315. The first housing 313 is used to encapsulate the vibrating diaphragm 302; the second housing 314 and the third housing 315 are used to encapsulate the first ultrasonic transducer 301; and an adjusting ring 304 is disposed between the first housing 313 and the second housing 314. Specifically, in addition to adjusting the tightness between the ultrasonic transmitter and the vibrating diaphragm 302, the adjusting ring 304 also has the following functions: The first housing 313, the adjusting ring 304, and the second housing 314 all have threaded structures. The first housing 313 and the adjusting ring 304 are screwed onto the end of the second housing 314 through these threads, ensuring a tight fit between them and preventing the first housing 313 from loosening. Furthermore, a sealing ring (equivalent to a gasket structure) can be provided between the first housing 313 and the adjusting ring 304 to further prevent the first housing 313 from loosening. It is understood that adjusting the tightness between the ultrasonic transmitter and the vibrating diaphragm 302 can also be achieved by rotating the adjusting ring 304 and the first housing 313 to adjust their position within the second housing 314.

[0082] Furthermore, the second housing 314 and the third housing 315 clamp the first ultrasonic transducer 301 by a threaded connection. The front end of the first ultrasonic transducer 301 is provided with a flange. The first ultrasonic transducer 301 contacts the second housing 314 and / or the third housing 315 through the flange. That is, the first ultrasonic transducer 301 only contacts the outer shell at the flange, and the rest is suspended. This can minimize the energy loss of ultrasound.

[0083] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: a piston cap 316, a washer 317, and a pressure ring 318. The piston cap 316 is fixed to one end of the piston cylinder 311 near the injection cylinder 312; the washer 317 is fixed to the outer edge of the vibrating diaphragm 302; the first end of the pressure ring 318 presses against the washer 317, and the second end of the pressure ring 318 presses against the piston cap 316, thus pressing the vibrating diaphragm 302. Specifically, the piston cap 316 presses against the washer 317 through the pressure ring 318, and the washer 317 then presses against the vibrating diaphragm 302, keeping the vibrating diaphragm 302 in a taut state, increasing its elasticity, thereby allowing the vibrating diaphragm 302 to vibrate more effectively; at the same time, it facilitates the disassembly and replacement of the vibrating diaphragm 302, making the vibrating diaphragm 302 a consumable. The piston cap 316 is generally made of polytetrafluoroethylene (PTFE), which ensures corrosion resistance and sealing sliding functions. In this embodiment, the pressure ring 318 presses against the washer 317 to provide a seal; at the same time, it holds the piston cap 316 in place to prevent it from falling off the piston cylinder 311.

[0084] like Figure 21 As shown, the present invention also provides a catalyst slurry delivery system. This catalyst slurry delivery system includes: a nozzle 10, a fuel cell catalyst slurry dispersion device 100, and the fuel cell catalyst slurry cooling device described in the above embodiments.

[0085] The nozzle 10 is used to spray and coat the catalyst slurry. In this embodiment, an ultrasonic nozzle 10 is used. The fuel cell catalyst slurry dispersion device 100 is used to stir and disperse the catalyst slurry in the pipeline. The fuel cell catalyst slurry dispersion device 100 is connected between the material tank 1 and the sampler 3 and / or between the sampler 3 and the nozzle 10.

[0086] The catalyst slurry conveying system provided by the present invention not only cools the catalyst slurry to prevent agglomeration due to temperature rise, but also further prevents agglomeration due to sedimentation by stirring and dispersing the catalyst slurry in the pipeline, thus solving the problem of catalyst slurry agglomeration during the conveying process in two ways.

[0087] The following is combined with Figures 13-20 This invention describes a fuel cell catalyst slurry dispersion device 100. The fuel cell catalyst slurry dispersion device 100 includes: a vibration mechanism, a guide wire 13, and a delivery pipe. The vibration mechanism is capable of generating vibration; a first end of the guide wire 13 is connected to the vibration mechanism; the delivery pipe is filled with catalyst slurry, and the guide wire 13 is disposed within the delivery pipe along its length, enabling the guide wire 13 to transmit the vibration generated by the vibration mechanism to the catalyst slurry within the delivery pipe.

[0088] Specifically, the tank 1 for holding the catalyst slurry is connected to the injector 3 via the aforementioned infusion tube and / or the injector 3 is connected to the ultrasonic nozzle 10 via the aforementioned infusion tube. The vibration generated by the vibration mechanism is transmitted to the catalyst slurry inside the infusion tube through the guide wire 13, so that the catalyst slurry inside the infusion tube can be stirred and dispersed, avoiding the agglomeration of the catalyst slurry.

[0089] Furthermore, the diameter of the guide wire 13 is much smaller than that of the infusion tube, allowing it to extend along the infusion tube. Even if the infusion tube is long and has a large diameter, the guide wire 13 can still transmit vibrations to the catalyst slurry, thereby preventing the catalyst slurry from agglomerating in the long and large diameter infusion tube.

[0090] The present invention provides a fuel cell catalyst slurry dispersion device 100, which generates vibration through a vibration mechanism and transmits the vibration to the catalyst slurry in the delivery pipe through a guide wire 13, so that the catalyst slurry inside the delivery pipe can be stirred and dispersed. Even if the catalyst slurry is transported in a long and large diameter delivery pipe, the agglomeration of the catalyst slurry can be avoided, thereby improving the activity of the catalyst slurry.

[0091] In one embodiment of the present invention, the vibration mechanism is an ultrasonic vibration mechanism, specifically comprising: a second ultrasonic transducer 11 and a vibration rod 12. The second ultrasonic transducer 11 is capable of emitting ultrasonic waves; the first end of the vibration rod 12 is connected to the second ultrasonic transducer 11, and the second end of the vibration rod 12 is connected to the first end of a guide wire 13, for transmitting the ultrasonic waves generated by the second ultrasonic transducer 11 to the guide wire 13. The second ultrasonic transducer 11 emits ultrasonic waves, which are transmitted to the guide wire 13 via the vibration rod 12. The guide wire 13 emits ultrasonic waves in all directions within the infusion tube, and the vibration of the sound waves stirs the catalyst slurry. Specifically, the second ultrasonic transducer 11 and the vibration rod 12 can be connected by a screw.

[0092] Preferably, the length of the guide wire 13 should be an integer multiple of half the wavelength of the ultrasonic vibration; the diameter of the guide wire 13 is 0.2 mm, and it is made of titanium alloy or stainless steel; the diameter of the fine hole at the front end of the vibrating rod 12 is 0.5 mm, and the depth is 1 mm; during operation, the second ultrasonic transducer 11 transmits ultrasonic energy to the vibrating rod 12, and the vibrating rod 12 further increases the amplitude of the ultrasonic vibration and transmits it to the guide wire 13. The ultrasonic wave continues to be transmitted along the guide wire 13. Since the guide wire 13 and the vibrating rod 12 are in long-term contact with the slurry liquid, they can be replaced as consumables at regular intervals.

[0093] In one embodiment of the present invention, the vibrating rod 12 and the guide wire 13 can be connected in several ways, one of which is that the second end of the vibrating rod 12 and the first end of the guide wire 13 are connected by welding. In this embodiment, the vibrating rod 12 and the guide wire 13 are welded together and cannot be separated. When replacement is required, the vibrating rod 12 and the guide wire 13 need to be removed together.

[0094] In one embodiment of the present invention, the vibrating rod 12 and the guide wire 13 can be connected in multiple ways. One of these ways is as follows: the fuel cell catalyst slurry dispersion device 100 further includes a first connecting part, and the second end of the vibrating rod 12 is provided with a second connecting part. The second connecting part is adapted to be detachably connected to the first connecting part, and the first connecting part is fixedly connected to the first end of the guide wire 13. Specifically, the first connecting part includes a fixing plate 14 and a first nut 15. The fixing plate 14 is fixedly connected to the first end of the guide wire 13; the fixing plate 14 and the first nut 15 are pressed and fixed; the second connecting part includes a first threaded part, which is detachably connected to the first nut 15. In this embodiment, the vibrating rod 12 and the guide wire 13 are detachably connected by a threaded connection. Specifically, the first nut 15 provided on the guide wire 13 can be engaged with the first threaded part provided at the second end of the vibrating rod 12. In this embodiment, the vibrating rod 12 and the guide wire 13 can be separated or joined by rotating the first nut 15 with a tool. As consumables, the vibrating rod 12 and the guide wire 13 are easy to install, remove, and replace individually.

[0095] In one embodiment of the present invention, the vibrating rod 12 and the guide wire 13 can be connected in multiple ways. One of these ways is as a second threaded connection method that can replace the above embodiments. The first connecting part includes a second nut 16, one end of which has a biting part 161, which is engaged with the first end of the guide wire 13. The second connecting part includes a second threaded part, which is detachably connected to the second nut 16. In this embodiment, a special second nut 16 is designed to replace the first nut 15 and the fixing plate 14 in the above embodiments. In this embodiment, the second nut 16 is engaged with the guide wire 13 through its biting part 161. By rotating the second nut 16 with a tool, the guide wire 13 can be separated or connected to the vibrating rod 12, making it convenient for the vibrating rod 12 and the guide wire 13 to be installed, removed, and replaced separately.

[0096] Furthermore, the engagement portion 161 includes a tapered structure composed of multiple notches circumferentially arranged around the axis of the second nut 16, the multiple notches engaging with the first end of the guide wire 13. Specifically, as... Figure 20As shown, a tiny circular hole is formed at the center of multiple notches, through which the guide wire 13 engages and is fixed with the second nut 16. When the guide wire 13 needs to be replaced, simply rotate the second nut 16 to remove it, and the guide wire 13 will be removed along with it.

[0097] In one embodiment of the present invention, the fuel cell catalyst slurry dispersion device 100 further includes a first cover 17 and a second cover 18. The first cover 17 encapsulates the second ultrasonic transducer 11; the second cover 18 is connected to the first cover 17 and encapsulates the vibrating rod 12 via a sealing element (a sealing ring may be used). In this embodiment, the second ultrasonic transducer 11 and the vibrating rod 12 can be removed by removing the first cover 17 and the second cover 18. Furthermore, the vibrating rod 12 has a flange at the diameter change point, and the flange has threads. The second cover 18 is fixed to the vibrating rod 12 via the threads and the sealing ring. This reduces the dead volume of residual liquid and separates the second ultrasonic transducer 11 and the vibrating rod 12 into two parts, allowing the vibrating rod 12 and the outer casing to be removed from the second ultrasonic transducer 11 for cleaning or replacement, facilitating later maintenance.

[0098] In one embodiment of the present invention, the fuel cell catalyst slurry dispersion device 100 further includes: a pipe connector 19 and a tee connector 20; the infusion pipe includes: a first infusion pipe 21, a second infusion pipe 22, and a third infusion pipe 23. The first end of the pipe connector 19 is connected to the vibration mechanism; the tee connector 20 includes a first connector, a second connector, and a third connector that are interconnected; the first end of the first infusion pipe 21 is connected to the second end of the pipe connector 19, and the second end of the first infusion pipe 21 is connected to the first connector; the second infusion pipe 22 is connected to the second connector; and the third infusion pipe 23 is connected to the third connector. Specifically, the guide wire 13 is connected to the vibration rod 12 and passes sequentially through the second cover 18, the pipe connector 19, the first infusion pipe 21, the tee connector 20, and the second infusion pipe 22, for stirring and dispersing the catalyst slurry inside the first infusion pipe 21 and the second infusion pipe 22. It should be understood that one of the second infusion tube 22 and the third infusion tube 23 is an inlet tube and the other is an outlet tube. In this embodiment, the third infusion tube 23 is an inlet tube and the second infusion tube 22 is an outlet tube. Optionally, the second infusion tube 22 is connected to the ultrasonic nozzle 10 and the third infusion tube 23 is connected to the sampler 3.

[0099] like Figure 21As shown, the present invention also provides a catalyst slurry delivery system. This catalyst slurry delivery system includes: a material tank 1, a sampler 3, a nozzle 10, and the fuel cell catalyst slurry dispersion device 100 described in the above embodiments. The material tank 1 is equipped with a first temperature control device 2; the sampler 3 is equipped with a second temperature control device 4; and the fuel cell catalyst slurry dispersion device 100 is connected between the material tank 1 and the sampler 3 and / or between the sampler 3 and the nozzle 10.

[0100] The catalyst slurry conveying system provided by the present invention not only achieves the stirring and dispersion of the catalyst slurry in the pipeline, avoiding its agglomeration due to sedimentation, but also cools the catalyst slurry through the first temperature control device 2 and the second temperature control device 4, avoiding its agglomeration due to temperature rise. Thus, the problem of catalyst slurry agglomeration during the conveying process is solved in two aspects.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuel cell catalyst slurry dispersion device, characterized in that, include: A vibration mechanism capable of generating vibration; A guide wire, the first end of which is connected to the vibration mechanism; An infusion tube is filled with catalyst slurry, and a guide wire is disposed inside the infusion tube along the length of the infusion tube. The guide wire can transmit the vibration generated by the vibration mechanism to the catalyst slurry inside the infusion tube. The vibration mechanism includes: An ultrasonic transducer capable of emitting ultrasonic waves; A vibrating rod, the first end of which is connected to the ultrasonic transducer, and the second end of which is connected to the first end of the guidewire, for transmitting the ultrasonic waves generated by the ultrasonic transducer to the guidewire; It also includes: a first connecting part, wherein the second end of the vibration rod is provided with a second connecting part, the second connecting part is adapted to be detachably connected to the first connecting part, and the first connecting part is fixedly connected to the first end of the guide wire; The first connecting part includes: a second nut, one end of which has an engagement part that engages with the first end of the guide wire; The second connecting part includes: a second threaded part, which is detachably connected to the second nut; The engagement portion includes a tapered structure, which is composed of multiple notches arranged circumferentially around the axis of the second nut, and the multiple notches are engaged with the first end of the guide wire.

2. The fuel cell catalyst slurry dispersion device according to claim 1, characterized in that, The second end of the vibrating rod is connected to the first end of the guide wire by welding.

3. The fuel cell catalyst slurry dispersion device according to claim 1, characterized in that, The first connecting part includes: A fixing plate, wherein the fixing plate is fixedly connected to the first end of the guide wire; The first nut is used to press and fix the fixing plate to the first nut. The second connecting part includes: a first threaded part, which is detachably connected to the first nut.

4. The fuel cell catalyst slurry dispersion apparatus according to any one of claims 1 to 3, characterized in that, Also includes: A first enclosure, which is used to enclose the ultrasonic transducer; A second cover, connected to the first cover, is used to encapsulate the vibrating rod through a seal.

5. The fuel cell catalyst slurry dispersion apparatus according to any one of claims 1 to 3, characterized in that, Also includes: A pipe connector, the first end of which is connected to the vibration mechanism; A tee connector, comprising a first connector, a second connector, and a third connector that are interconnected; The infusion tubing includes: A first infusion tube, wherein a first end of the first infusion tube is connected to a second end of the tubing connector, and the second end of the first infusion tube is connected to the first connector; The second infusion tube is connected to the second connector; The third infusion tube is connected to the third connector.

6. A catalyst slurry conveying system, characterized in that, include: The material hopper is equipped with a first temperature control device; The sample injector is equipped with a second temperature control device; nozzle; The fuel cell catalyst slurry dispersion device according to any one of claims 1 to 5, wherein the fuel cell catalyst slurry dispersion device is connected between the material tank and the injector and / or between the injector and the nozzle.

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