Pretreatment device for electrochemical performance detection of fuel cell catalyst

Abstract

The utility model provides a pretreatment device for detecting the electrochemical performance of a fuel cell catalyst, and belongs to the field of catalyst performance detection equipment.The pretreatment device for detecting the electrochemical performance of the fuel cell catalyst comprises a refrigeration box, a sample loading assembly, a detection device and a control device, the electrode drying assembly is located outside the refrigeration box; the ultrasonic vibrator is connected with the refrigeration box; the automatic sampling assembly comprises a moving assembly and a sampler, the moving assembly is fixedly connected with the sampler, and the moving assembly is used for driving the sampler to move between the sample loading assembly and the electrode drying assembly. By arranging the automatic sampling assembly, a catalyst in the sample loading assembly can be automatically sampled and then placed on the electrode drying assembly, so that automation and intelligence of sampling are realized, pretreatment before electrochemical detection of the fuel cell catalyst is intelligentized, the labor intensity is reduced, meanwhile, the influence of human factors is avoided, and the detection efficiency is improved. And the detection efficiency and accuracy are improved.

Description

Pretreatment device for testing the electrochemical performance of fuel cell catalysts Technical Field

[0001] This application relates to the technical field of catalyst performance testing equipment, specifically to a pretreatment device for testing the electrochemical performance of fuel cell catalysts. Background Technology

[0002] Catalysts play a crucial role in electrochemistry by accelerating reactions, improving reaction selectivity, and reducing energy loss. The surface morphology, chemical composition, and electrochemical performance of catalysts all affect the efficiency and stability of electrocatalytic reactions. Therefore, detecting the electrochemical performance of catalysts helps researchers understand their efficiency and stability, providing important guidance for electrocatalytic reactions.

[0003] Currently, the common method for pretreating catalysts before testing their electrochemical performance in the laboratory is to first place the prepared catalyst in a designated container for low-temperature ultrasonic dispersion, then manually take a certain amount of the dispersed catalyst and drop it onto a disc electrode to dry. After the catalyst pretreatment is completed, the electrochemical performance is tested. The catalyst pretreatment process is mainly done manually, which is labor-intensive, involves many human factors, has a long operation cycle, and results in low timeliness of test data. Summary of the Invention

[0004] In view of the technical problems existing in the background art, this application provides a pretreatment device for testing the electrochemical performance of fuel cell catalysts, which integrates low temperature, ultrasound, automatic sampling and automatic drying functions to realize intelligent pretreatment of the entire process before electrochemical testing of fuel cell catalysts.

[0005] This application provides a pretreatment device for testing the electrochemical performance of a fuel cell catalyst, comprising: a refrigeration chamber having a sample loading assembly for loading the catalyst inside the refrigeration chamber; an electrode drying assembly located outside the refrigeration chamber; an ultrasonic vibrator connected to the refrigeration chamber; and an automatic sampling assembly including a moving assembly and a sampler, the moving assembly and the sampler being fixedly connected, the moving assembly being used to drive the sampler to move between the sample loading assembly and the electrode drying assembly.

[0006] In the technical solution of this application embodiment, the catalyst is uniformly dispersed in the sample loading assembly by an ultrasonic vibrator; by setting an automatic sampling assembly, the catalyst in the sample loading assembly can be automatically sampled and placed on the electrode drying assembly, realizing the automation and intelligence of sampling; by setting an electrode drying assembly, the catalyst can be dried, which facilitates the subsequent detection of the catalyst's electrochemical performance, realizes the intelligent pretreatment of electrochemical detection of fuel cell catalyst, reduces labor intensity, avoids the influence of human factors, and improves detection efficiency and accuracy.

[0007] In some embodiments, the moving component includes a first moving module, a second moving module, and a third moving module that are orthogonal to each other in pairs. The second moving module is slidably connected to the first moving module, the third moving module is slidably connected to the second moving module, and the third moving module is connected to the sampler.

[0008] The pretreatment device for testing the electrochemical performance of the fuel cell catalyst also includes a protective housing, and the first moving module is connected to the protective housing.

[0009] In this embodiment, by setting up a first moving module, a second moving module, and a third moving module, the sampler is reciprocated between the sample loading component and the electrode drying component using a three-dimensional moving structure, providing favorable conditions for automatic sampling and automatic drop coating.

[0010] In some embodiments, the first moving module includes an X-axis slide rail and an X-axis telescopic cylinder for driving the second moving module to slide; the second moving module includes a Y-axis slide rail and a Y-axis telescopic cylinder for driving the third moving module to slide; the third moving module includes an inverted L-shaped bracket, a Z-axis telescopic cylinder, and an L-shaped clamping mold connected in sequence; the L-shaped clamping mold is connected to the sampler, the inverted L-shaped bracket is provided with a Z-axis slide rail, and the L-shaped clamping mold is provided with a slider that matches the Z-axis slide rail.

[0011] In this embodiment, the second moving module is driven to reciprocate by setting an X-axis slide rail and an X-axis telescopic cylinder; the third moving module is driven to reciprocate by setting a Y-axis slide rail and a Y-axis telescopic cylinder; and the sampler is driven to reciprocate by setting a Z-axis telescopic cylinder.

[0012] In some embodiments, the pretreatment device for testing the electrochemical performance of the fuel cell catalyst further includes a vibration generator connected to the sample loading assembly.

[0013] In this embodiment, by setting up a vibration generator, the catalyst of a small volume is uniformly and rapidly dispersed in the dispersant through the synergy between the ultrasonic vibrator and the vibration generator.

[0014] In some embodiments, the pretreatment device for testing the electrochemical performance of the fuel cell catalyst further includes a cleaning assembly for cleaning the sampler; the cleaning assembly includes a clean water tank and a water pump, and a hose is provided between the clean water tank, the water pump and the sampler.

[0015] In this embodiment, by setting up a cleaning component, the sampler can be automatically cleaned, which not only avoids the mutual influence between different types of catalysts, but also allows the sampler to be cleaned in time after sampling, making it convenient for the next use.

[0016] In some embodiments, the refrigeration box includes a box body, a heat exchange layer, and an insulation layer arranged sequentially from the inside to the outside; the heat exchange layer is connected to a refrigeration unit; and a thermocouple is provided inside the box body.

[0017] In this embodiment, by setting up a heat exchange layer and a cooling box, the water inside the box is cooled down, thereby providing a low-temperature environment for the sample loading components; by setting up an insulation layer, the low-temperature environment inside the box is maintained; by setting up thermocouples, the water temperature inside the box can be monitored in real time, ensuring the reliability of the low-temperature environment.

[0018] In some embodiments, the electrode drying assembly includes an electrode distributor, a disc electrode sleeved on the electrode distributor, and a drying electric heater disposed below the electrode distributor.

[0019] In this embodiment, by setting an electrode distributor, it is easy to fix several disk electrodes; by setting a drying electric heater, the catalyst drop-coated on the disk electrodes can be dried quickly, shortening the catalyst pretreatment time and facilitating subsequent electrochemical performance testing.

[0020] In some embodiments, the sample loading assembly includes a test tube rack and test tubes mounted on the test tube rack, the test tube rack being connected to the vibration generator.

[0021] In this embodiment, a test tube rack is set up to fix several test tubes. By connecting the test tube rack to a vibration generator, the vibration generator drives the test tube rack to vibrate, thereby causing the test tubes to vibrate, so that the catalyst in the test tubes is evenly dispersed and prevents sticking and agglomeration.

[0022] In some embodiments, the protective housing includes a housing and an upper operating platform, a middle platform, and a bottom platform disposed inside the housing from top to bottom; the upper operating platform is provided with a refrigeration box mounting slot, an electrode drying component mounting slot, and a pipette cleaning slot, the refrigeration box is installed in the refrigeration box mounting slot, and the electrode drying component is installed in the electrode drying component mounting slot.

[0023] In this embodiment, by setting up a protective casing, an upper operating table, a middle platform, and a bottom platform, it is convenient to install different components, thereby integrating the fuel cell catalyst electrochemical performance testing and pretreatment device.

[0024] In some embodiments, a waste recycling bin is provided at the bottom of the electrode drying assembly mounting tank and the pipette cleaning tank, and the waste recycling bin is placed on the intermediate platform.

[0025] In this embodiment, by setting up a waste recycling bin, the catalyst that falls off the electrode drying assembly and the cleaning fluid of the sampler can be recovered in a timely manner, which facilitates the centralized treatment of subsequent waste liquid.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0027] To more clearly illustrate the technical solution of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0028] Figure 1 is a schematic diagram of the pretreatment device for detecting the electrochemical performance of fuel cell catalysts in an embodiment of this application.

[0029] Figure 2 is a top view of the upper operating console in an embodiment of this application;

[0030] Figure 3 is a schematic diagram of the structure of the third mobile module in the embodiment of this application;

[0031] Figure 4 is a schematic diagram of the sample loading assembly in an embodiment of this application;

[0032] Figure 5 is a schematic diagram of the electrode drying assembly in an embodiment of this application;

[0033] Figure reference numerals: 100-Pretreatment device for electrochemical performance testing of fuel cell catalyst; 1-Refrigeration chamber; 2-Automatic sampling assembly; 3-Vibration generator; 4-Sample loading assembly; 5-Ultrasonic vibrator; 6-Cleaning assembly; 7-Protective housing; 8-Connector; 9-Electrode drying assembly; 11-Housing; 12-Heat exchange layer; 13-Insulation layer; 14-Refrigeration unit; 15-Thermocouple; 16-Liquid discharge port; 21-First moving module; 22-Second moving module; 23-Working suspension beam; 24-Third moving module; 25-Sampler; 41-Test tube rack; 42-Test tube; 43-Positioning hole; 61-Hose; 62-Clean water tank; 63-Water pump; 71-Housing shell; 72-... 73-Upper operating platform; 74-Middle platform; 75-Bottom platform; 76-Electrode drying component mounting slot; 77-Refrigeration box mounting slot; 78-Pipette cleaning slot; 79-Fixing plate; 80-Waste recycling box; 81-T-type clamp; 82-T-type slot; 91-Electrode distributor; 92-Disc electrode; 93-Drying electric heater; 211-X-axis slide rail; 212-X-axis telescopic cylinder; 213-X-axis fixed seat; 221-Y-axis slide rail; 222-Y-axis telescopic cylinder; 223-Y-axis fixed seat; 241-Inverted L-shaped bracket; 242-Z-axis telescopic cylinder; 243-Z-axis slide rail; 244-L-shaped clamping mold; 245-Slider; 751-First waste liquid outlet. Detailed Implementation

[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments of this application, the technical terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Catalysts play a crucial role in the field of electrochemistry, and the detection of their electrochemical performance is of great guiding significance in electrocatalytic reactions. Currently, the common method for pretreating catalysts before testing their electrochemical performance in the laboratory is to first place the prepared catalyst in a designated container, and then have the operator hold the container and perform low-temperature ultrasonic dispersion. After that, a certain amount of the dispersed catalyst is manually dropped onto a disc electrode to dry. This process is mainly done manually, which is labor-intensive, involves many human factors, has a long operation cycle, and results in low timeliness and accuracy of the test data.

[0041] To address the current technical problem that catalyst pretreatment for testing electrochemical performance in laboratories primarily relies on manual labor, this application provides a pretreatment device for testing the electrochemical performance of fuel cell catalysts. This device utilizes a cooling chamber to provide a low-temperature environment for the catalyst; an ultrasonic vibrator to achieve uniform dispersion of the catalyst in the sample loading assembly; an automatic sampling assembly to automatically sample the catalyst from the loading assembly and place it on an electrode drying assembly, achieving automated and intelligent sampling; and an electrode drying assembly to dry the catalyst, facilitating subsequent electrochemical performance testing. This intelligent pretreatment process for fuel cell catalyst electrochemical testing reduces labor intensity, avoids the influence of human factors, and improves testing efficiency and accuracy.

[0042] Referring to Figures 1 and 2, a pretreatment device 100 for testing the electrochemical performance of a fuel cell catalyst, as provided in this embodiment, includes: a refrigeration chamber 1 containing a sample loading assembly 4 for loading the catalyst; an electrode drying assembly 9 located outside the refrigeration chamber 1; an ultrasonic vibrator 5 connected to the refrigeration chamber 1; and an automatic sampling assembly 2, including a moving assembly and a sampler 25, which are fixedly connected. The moving assembly drives the sampler 25 to move between the sample loading assembly 4 and the electrode drying assembly 9. Specifically, the sampler 25 is a metering pipette. When testing the electrochemical performance of the fuel cell catalyst is required, the prepared catalyst is placed in the sample loading assembly 4 (which is pre-loaded with a dispersant) in the refrigeration chamber 1. The ultrasonic vibrator 5 uses ultrasonic vibration to uniformly disperse the catalyst in the sample loading assembly 4 in the dispersant. The automatic sampling assembly 2 samples the catalyst from the sample loading assembly 4 and drips it onto the electrode drying assembly 9 for drying. After pretreatment, subsequent electrochemical performance testing is performed. When a catalyst dosing mechanism is installed at the front end of the fuel cell catalyst electrochemical performance testing and pretreatment device 100, and an electrochemical performance testing mechanism is installed at its rear end, the entire process of catalyst dosing, catalyst pretreatment, and catalyst electrochemical performance testing can be integrated and intelligently operated.

[0043] In the technical solution of this application embodiment, by setting up a refrigeration box 1, a low-temperature environment can be provided for the catalyst to ensure its stable existence; by setting up an ultrasonic vibrator 5, the refrigerant in the refrigeration box 1 is provided with vibration, thereby enabling the small volume of catalyst to be uniformly and rapidly dispersed in the dispersant, ensuring the uniformity and representativeness of subsequent sampling; by setting up an automatic sampling component 2, the catalyst in the sample loading component 4 can be automatically sampled and dripped onto the electrode drying component 9, realizing the automation and intelligence of sampling; by setting up an electrode drying component 9, the catalyst can be dried, which facilitates the subsequent detection of the catalyst's electrochemical performance. The fuel cell catalyst electrochemical performance detection pretreatment device 100 of this application integrates low temperature, ultrasound, automatic sampling, and drying functions, realizing the intelligentization of fuel cell catalyst electrochemical detection pretreatment, improving the adverse effects of high labor intensity, many human factors, long operation cycle, and low timeliness of test data in the catalyst pretreatment process, reducing labor intensity, and improving detection efficiency and accuracy.

[0044] Further, in the embodiments of this application, as shown in Figures 2 and 3, the moving component includes a first moving module 21, a second moving module 22, and a third moving module 24 that are orthogonal to each other; the second moving module 22 is slidably connected to the first moving module 21, the third moving module 24 is slidably connected to the second moving module 22, and the third moving module 24 is connected to the sampler 25; the fuel cell catalyst electrochemical performance testing pretreatment device 100 also includes a protective housing 7, and the first moving module 21 is connected to the protective housing 7. Specifically, the second moving module 22 and the third moving module 24 are connected by a working suspension beam 23. When it is necessary to sample the catalyst in the sample loading assembly 4 and drip it onto the electrode drying assembly 9, the second moving module 22 drives the third moving module 24 to slide on the first moving module 21 to a preset position; then the third moving module 24 slides on the second moving module 22 to the preset position, at which point the sampler 25 is located above the sample loading assembly 4; then the third moving module 24 lowers to place the sampler 25 in the sample loading assembly 4 for sampling. After sampling is completed, the third moving module 24 drives the sampler 25 to rise, and then the third moving module 24 slides on the second moving module 22 to the preset position, at which point the sampler 25 is located above the electrode drying assembly 9; the third moving module 24 lowers to drip the catalyst in the sampler 25 onto the electrode drying assembly 9. Understandably, an air pump or cylinder can be connected to the sampler 25 to achieve automatic sampling from the sample loading assembly 4 and automatic dripping onto the electrode drying assembly 9.

[0045] In the technical solution of this application embodiment, by setting a first moving module 21, a second moving module 22 and a third moving module 24, the second moving module 22 can slide back and forth on the first moving module 21, the third moving module 24 can slide back and forth on the second moving module 22, and the third moving module 24 can drive the sampler 25 to move up and down back and forth. The sampler 25 can move back and forth between the sample loading component 4 and the electrode drying component 9 through the three-dimensional moving structure, which provides favorable conditions for automatic sampling and automatic drop coating.

[0046] Further, in the embodiments of this application, as shown in Figures 2 and 3, the first moving module 21 includes an X-axis slide rail 211 and an X-axis telescopic cylinder 212 for driving the second moving module 22 to slide; the second moving module 22 includes a Y-axis slide rail 221 and a Y-axis telescopic cylinder 222 for driving the third moving module 24 to slide; the third moving module 24 includes an inverted L-shaped bracket 241, a Z-axis telescopic cylinder 242 and an L-shaped clamping mold 244 connected in sequence; the L-shaped clamping mold 244 is connected to the sampler 25, the inverted L-shaped bracket 241 is provided with a Z-axis slide rail 243, and the L-shaped clamping mold 244 is provided with a slider 245 that matches the Z-axis slide rail. Specifically, the first moving module 21 further includes an X-axis fixed base 213, on which an X-axis slide rail 211 is mounted; the second moving module 22 further includes a Y-axis fixed base 223, on which a Y-axis slide rail 221 is mounted, and an X-axis telescopic cylinder 212 is connected to the Y-axis fixed base 223, allowing the Y-axis fixed base 223 to reciprocate on the X-axis slide rail 211; the Y-axis telescopic cylinder 222 is connected to the third moving module 24, and the horizontal support of the inverted L-shaped bracket 241 is fixed. A Z-axis telescopic cylinder 242 is fixed, a vertical bracket is fixed with a Z-axis slide rail 243, an L-shaped clamping mold 244 is connected to the telescopic end of the Z-axis telescopic cylinder 242, a sampler 25 is fixed to the clamping end of the L-shaped clamping mold 244, an X-axis telescopic cylinder 212 drives the second moving module 22 to slide on the X-axis slide rail 211, a Y-axis telescopic cylinder 222 drives the third moving module 24 to slide on the Y-axis slide rail 221, and a Z-axis telescopic cylinder 242 drives the sampler 25 to slide on the Z-axis slide rail 243.

[0047] In the technical solution of this application embodiment, the second moving module 22 is driven to reciprocate by setting the X-axis slide rail 211 and the X-axis telescopic cylinder 212; the third moving module 24 is driven to reciprocate by setting the Y-axis slide rail 221 and the Y-axis telescopic cylinder 222; and the sampler 25 is driven to reciprocate by setting the Z-axis telescopic cylinder 242. That is, through the mutual coordination of the first moving module 21, the second moving module 22 and the third moving module 24, the sampler 25 is reciprocated between the sample loading assembly 4 and the electrode drying assembly 9.

[0048] Furthermore, in this embodiment of the application, as shown in Figures 1 and 4, the pretreatment device 100 for testing the electrochemical performance of the fuel cell catalyst also includes a vibration generator 3 connected to the sample loading assembly 4. Specifically, the sample loading assembly 4 and the vibration generator 3 are connected by a connector 8. The connector 8 includes a T-shaped slot 82 fixedly connected to the vibration generator 3 and a T-shaped clip 81 fixedly connected to the sample loading assembly 4. The connection between the vibration generator 3 and the sample loading assembly 4 is achieved through the mutual cooperation of the T-shaped clip 81 and the T-shaped slot 82.

[0049] In the technical solution of this application embodiment, by setting a vibration generator 3, the catalyst in the sample loading component 4 is further uniformly dispersed in the dispersion liquid, while preventing the agglomeration of the catalyst. That is, under the mutual coordination of the ultrasonic vibrator 5 and the vibration generator 3, the catalyst of a small volume is uniformly and rapidly dispersed in the dispersant by means of ultrasonic waves and mechanical vibration.

[0050] Furthermore, in this embodiment of the application, as shown in FIG1, the pretreatment device 100 for testing the electrochemical performance of fuel cell catalysts further includes a cleaning assembly 6 for cleaning the sampler 25; the cleaning assembly 6 includes a clean water tank 62 and a water pump 63, and a flexible hose 61 is provided between the clean water tank 62, the water pump 63 and the sampler 25. Specifically, one end of the flexible hose 61 near the clean water tank 62 extends into the clean water tank 62, and the other end of the flexible hose 61 near the sampler 25 extends into the top opening of the sampler 25. When the sampler 25 needs to be cleaned, for example when different types of catalysts need to be sampled, the sampler 25 needs to be cleaned, and the water pump 63 pumps clean water from the clean water tank 62 into the sampler 25 for cleaning.

[0051] In the technical solution of this application embodiment, the sampler 25 is automatically cleaned by setting the cleaning component 6, which avoids mutual influence between different types of catalysts. At the same time, the sampler 25 is cleaned in time after sampling to facilitate the next use.

[0052] Further, in this embodiment of the application, as shown in FIG1, the refrigeration box 1 includes a box body 11, a heat exchange layer 12, and an insulation layer 13 arranged sequentially from the inside to the outside; the heat exchange layer 12 is connected to the refrigeration unit 14; a thermocouple 15 is provided inside the box body 11. Specifically, clean water is placed in the box body 11, and a liquid discharge port 16 is provided at the bottom of the box body 11, which penetrates the heat exchange layer 12 and the insulation layer 13; the water inlet and outlet of the heat exchange layer 12 penetrate the insulation layer 13, and the water outlet of the refrigeration unit 14 is connected to the water inlet of the heat exchange layer 12, and the water outlet of the heat exchange layer 12 is connected to the water inlet of the refrigeration unit 14. The refrigeration unit 14 pumps cold water from the water inlet of the heat exchange layer 12 into the heat exchange layer 12, and at the same time, the cold water flows out from the water outlet of the heat exchange layer 12 and returns to the refrigeration unit 14 for refrigeration, forming a closed loop.

[0053] In the technical solution of this application embodiment, by setting up a heat exchange layer 12 and a refrigerator 14, the clean water inside the chamber 11 is cooled down, thereby providing a low-temperature environment for the sample loading assembly 4 and the catalyst, ensuring the stability of the catalyst and facilitating subsequent electrochemical performance testing. By setting up a heat insulation layer 13, the low-temperature environment inside the chamber 11 is maintained. By setting up a thermocouple 15, the water temperature inside the chamber 11 can be monitored in real time, ensuring the reliability of the low-temperature environment.

[0054] Furthermore, in the embodiments of this application, as shown in Figures 2 and 5, the electrode drying assembly 9 includes an electrode distributor 91, a disc electrode 92 sleeved on the electrode distributor 91, and a drying electric heater 93 disposed below the electrode distributor 91. Specifically, there are multiple disc electrodes 92, and different disc electrodes 92 can be coated with the same catalyst or different catalysts, thereby achieving the drying of multiple or more catalysts simultaneously.

[0055] In the technical solution of this application embodiment, by setting an electrode distributor 91, it is easy to fix several disk electrodes 92, thereby enabling the simultaneous pretreatment of multiple catalyst samples. By setting a drying electric heater 93, the catalyst drop-coated on the disk electrodes 92 can be dried rapidly, shortening the catalyst pretreatment time and facilitating subsequent electrochemical performance testing.

[0056] Furthermore, in this embodiment of the application, as shown in Figures 2 and 4, the sample loading assembly 4 includes a test tube rack 41 and test tubes 42 sleeved on the test tube rack 41. The test tube rack 41 is connected to the vibration generator 3. Specifically, the test tube rack 41 is provided with a plurality of positioning holes 43, and the test tubes 42 are movably mounted on the test tube rack 41 through the positioning holes 43.

[0057] In the technical solution of this application embodiment, a test tube rack 41 is provided to fix several test tubes 42, thereby providing space for the catalyst. By connecting the test tube rack 41 to the vibration generator 3, the vibration generator 3 drives the test tube rack 41 to vibrate, thereby driving the test tubes 42 to vibrate, so that the catalyst in the test tubes 42 is uniformly dispersed. By setting the number of test tubes 42 and disk electrodes 92 to several, the dispersion and drying of multiple or various catalysts can be achieved simultaneously.

[0058] Further, in this embodiment of the application, as shown in FIG1, the protective housing includes a housing 71 and an upper operating platform 72, an intermediate platform 73, and a bottom platform 74 arranged from top to bottom inside the housing 71; the refrigeration box 1, the automatic sampling component 2, the ultrasonic vibrator 5, the electrode drying component 9, and the vibration generator 3 are arranged on the upper operating platform 72; the water pump 63 is arranged on the intermediate platform 73; and the clean water tank 62 and the chiller 14 are arranged on the bottom platform 74. Specifically, as shown in FIG2, the upper operating platform 72 is provided with a refrigeration box mounting slot 76, an electrode drying component mounting slot 75, and a pipette cleaning slot 77. The refrigeration box 1 is installed in the refrigeration box mounting slot 76, and the bottom of the insulation layer 13 is placed on the intermediate platform 73. The refrigeration box mounting slot 76 has openings that match the liquid discharge port 16, the inlet and outlet of the heat exchange layer 12, and a fixing plate 78 is provided at the opening of the refrigeration box mounting slot 76 (i.e., the fixing plate 78 holds one of the openings of the housing 11). (Partially covered), the ultrasonic vibrator 5 and the thermocouple 15 extend into the interior of the housing 11 through the fixing plate 78, and the ultrasonic wave generating end of the ultrasonic vibrator 5 extends into the interior of the housing 11; the electrode drying assembly 9 is installed in the electrode drying assembly mounting slot 75; when the sampler 25 needs to be cleaned, the first moving module 21, the Y-axis moving module 22 and the third moving module 24 work together to move the sampler 25 into the pipette cleaning tank 77, and then the cleaning assembly 6 is started to clean the sampler 25.

[0059] In the technical solution of this application embodiment, by setting a protective housing 7, each component is sealed inside the housing 71 (the housing 71 is provided with an opening and closing door), so that the pretreatment of the catalyst is carried out under closed conditions to prevent interference from external conditions; by setting an upper operating platform 72, an intermediate platform 73 and a bottom platform 74, it is convenient to install different components, so that the fuel cell catalyst electrochemical performance testing pretreatment device 100 is integrated.

[0060] Furthermore, in this embodiment of the application, as shown in FIG5, a waste collection box 79 is provided at the bottom of the electrode drying assembly mounting tank 75 and the pipette cleaning tank 77, and the waste collection box 79 is placed on the intermediate platform 73. Specifically, a first waste liquid outlet 751 is provided at the bottom of the electrode drying assembly mounting tank 75, and a second waste liquid outlet is provided at the bottom of the pipette cleaning tank 77. The waste liquid discharged from the first waste liquid outlet 751 and the second waste liquid outlet enters the waste collection box 79.

[0061] In the technical solution of this application embodiment, by setting a waste recycling box 79 at the bottom of the electrode drying assembly mounting tank 75 and the pipette cleaning tank 77, the catalyst that falls off the electrode drying assembly 9 and the cleaning liquid of the sampler 25 can be recycled in a timely manner, which facilitates the centralized treatment of subsequent waste liquid.

[0062] The working principle of the pretreatment device 100 for testing the electrochemical performance of fuel cell catalysts is as follows: First, a specified amount of clean water is added to the chamber 11 of the refrigeration chamber 1. The refrigeration unit 14 is started to supply refrigerant to the heat exchange layer 12 to achieve cooling and heat exchange of the clean water in the chamber 11. When the thermocouple 15 detects that the water temperature in the chamber 11 has reached the required level, the ultrasonic vibrator 5 and the vibration generator 3 are started in sequence. The frequency of the ultrasonic vibrator 5 and the vibration generator 3 can be adjusted according to the actual situation. Then, the catalyst is added to the test tube 42 containing the dispersant (or the catalyst can be added to the test tube 42 first, and then refrigeration, ultrasonic and mechanical vibration treatment can be performed). The ultrasonic vibrator 5 realizes ultrasonic micro-vibration of the clean water in the chamber 11, so that the catalyst in the test tube 42 is evenly dispersed. The vibration generator 3 drives the test tube 42 to mechanically vibrate, further realizing the even dispersion of the catalyst in the test tube 42 and preventing the catalyst from sticking to the wall or agglomerating. After a specified time of ultrasonic and mechanical vibration under low-temperature conditions, the automatic sampling component 2, through the coordinated action of the first moving module 21, the second moving module 22, and the third moving module 24, moves the sampler 25 above the first test tube 42 of the sample loading component 4. Then, the Z-axis telescopic cylinder 242 of the third moving module 24 is activated to extend the sampler 25 into the first test tube 42 for sampling. At this time, the air pump or cylinder connected to the sampler 25 is activated in reverse (not shown in the figure) to automatically achieve the sampler 25 drawing a specified amount of catalyst material. The Z-axis telescopic cylinder 242 retracts, removing the sampler 25 from the test tube 42 after sampling. The first moving module 21, the second moving module 22, and the third moving module 24 cooperate again to... The sampler 25 is moved to the upper side of the corresponding first disc electrode 92. The Z-axis telescopic cylinder 242 is activated to place the sampler 25 on the upper surface of the first disc electrode 92. The air pump or cylinder (the air pump or cylinder and the water pump 63 do not affect each other) is activated in the forward direction to drop the catalyst material in the sampler 25 onto the upper surface of the disc electrode 92. The above steps are repeated until the catalyst material in all the test tubes 42 is dropped onto the upper surface of the corresponding disc electrode 92. The ultrasonic vibrator 5, the vibration generator 3 and the refrigerator 14 stop working. The automatic sampling component 2 returns to its initial state. The drying electric heater 93 of the electrode drying component 9 is activated to dry the catalyst on the surface of the disc electrode 92 and complete the catalyst pretreatment process. If different test tubes 42 contain different types of catalysts, after sampling and drop coating, the first moving module 21, the second moving module 22, and the third moving module 24 work together to move the sampler 25 above the pipette cleaning tank 77. The water pump 63 starts in the forward direction and continues for a certain period of time to pump clean water from the clean water tank 62 into the sampler 25 and then discharge it, thus achieving self-cleaning of the sampler 25. After cleaning, the water pump 63 starts in the reverse direction to drain the clean water in the hose 61 into the clean water tank 62, and then sampling and drop coating are performed again. Throughout the process, the wastewater from cleaning the sampler 25 and the catalyst that falls off the electrode distributor 91 are rinsed and flow into the waste recovery tank 79.Alternatively, the sampler 25 can be automatically sampled using the water pump 63.

[0063] Please refer to Figures 1 to 5. According to one or more embodiments of this application, this application provides a low-temperature environment for the catalyst by setting up a refrigeration box 1; through the mutual coordination of the ultrasonic vibrator 5 and the vibration generator 3, the catalyst in the test tube 42 is uniformly dispersed and the catalyst is prevented from sticking to the wall or agglomerating, ensuring the uniformity and representativeness of subsequent sampling; by setting up an automatic sampling component 2, the catalyst in the sample loading component 4 can be automatically sampled and dripped onto the electrode drying component 9, realizing the automation and intelligence of sampling; by setting up the electrode drying component 9, the catalyst can be dried, which facilitates the subsequent detection of the catalyst's electrochemical performance, realizes the intelligent pretreatment of electrochemical detection of fuel cell catalyst, reduces labor intensity, avoids the influence of human factors, and improves detection efficiency and accuracy.

[0064] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A pretreatment device for detecting the electrochemical performance of a fuel cell catalyst, characterized in that, include: A refrigeration chamber, wherein the refrigeration chamber contains a sample loading assembly for loading the catalyst; and an electrode drying assembly, located outside the refrigeration chamber; An ultrasonic vibrator is connected to the refrigeration chamber; an automatic sampling assembly includes a moving component and a sampler, the moving component and the sampler being fixedly connected, the moving component being used to drive the sampler to move between the sample loading assembly and the electrode drying assembly.

2. The pretreatment device for detecting the electrochemical performance of fuel cell catalysts according to claim 1, characterized in that, The moving component includes a first moving module, a second moving module, and a third moving module that are orthogonal to each other in pairs; The second moving module is slidably connected to the first moving module, the third moving module is slidably connected to the second moving module, and the third moving module is connected to the sampler; the pretreatment device for detecting the electrochemical performance of the fuel cell catalyst also includes a protective housing, and the first moving module is connected to the protective housing.

3. The pretreatment device for detecting the electrochemical performance of fuel cell catalysts according to claim 2, characterized in that, The first moving module includes an X-axis slide rail and an X-axis telescopic cylinder for driving the second moving module to slide; the second moving module includes a Y-axis slide rail and a Y-axis telescopic cylinder for driving the third moving module to slide; the third moving module includes an inverted L-shaped bracket, a Z-axis telescopic cylinder, and an L-shaped clamping mold connected in sequence; the L-shaped clamping mold is connected to the sampler, the inverted L-shaped bracket is provided with a Z-axis slide rail, and the L-shaped clamping mold is provided with a slider that matches the Z-axis slide rail.

4. The pretreatment device for detecting the electrochemical performance of fuel cell catalysts according to claim 1, characterized in that, The pretreatment device for testing the electrochemical performance of the fuel cell catalyst also includes a vibration generator connected to the sample loading assembly.

5. The pretreatment device for detecting the electrochemical performance of fuel cell catalysts according to claim 1, characterized in that, The pretreatment device for testing the electrochemical performance of the fuel cell catalyst also includes a cleaning component for cleaning the sampler; the cleaning component includes a clean water tank and a water pump, and a hose is provided between the clean water tank, the water pump and the sampler.

6. The pretreatment device for detecting the electrochemical performance of fuel cell catalysts according to claim 1, characterized in that, The refrigeration box includes a box body, a heat exchange layer, and an insulation layer arranged sequentially from the inside to the outside; the heat exchange layer is connected to the refrigeration unit; and a thermocouple is installed inside the box.

7. The pretreatment device for detecting the electrochemical performance of a fuel cell catalyst according to claim 1, characterized in that, The electrode drying assembly includes an electrode distributor, a disc electrode sleeved on the electrode distributor, and a drying electric heater disposed below the electrode distributor.

8. The pretreatment device for detecting the electrochemical performance of fuel cell catalysts according to claim 4, characterized in that, The sample loading assembly includes a test tube rack and test tubes fitted on the test tube rack, and the test tube rack is connected to the vibration generator.

9. The pretreatment device for testing the electrochemical performance of fuel cell catalysts according to claim 2, characterized in that, The protective housing includes a housing and an upper operating platform, a middle platform, and a bottom platform arranged from top to bottom inside the housing; the upper operating platform is provided with a refrigeration box mounting slot, an electrode drying component mounting slot, and a pipette cleaning slot, the refrigeration box is installed in the refrigeration box mounting slot, and the electrode drying component is installed in the electrode drying component mounting slot.

10. The pretreatment device for detecting the electrochemical performance of a fuel cell catalyst according to claim 9, characterized in that, Waste recycling bins are provided at the bottom of the electrode drying assembly mounting tank and the pipette cleaning tank, and the waste recycling bins are placed on the intermediate platform.

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