Electrolyzed water catalytic electrode stability testing device

Abstract

The utility model relates to an electrolyzed water catalytic electrode stability testing device, which comprises a main control module, a man-machine interaction module, a water electrolysis module, a water electrolysis module and a water electrolysis module, and is characterized in that the man-machine interaction module is bidirectionally and electrically connected with the main control module; the electrochemical detection module is bidirectionally and electrically connected with the main control module; a plurality of IGBT power supply modules; the plurality of IGBT power supply modules are bidirectionally and electrically connected with the main control module; the input ends of the plurality of electrolytic cells are connected with the plurality of IGBT power supply modules; and the output ends of the plurality of electrolytic cells are connected with the electrochemical detection module. All the modules are integrated with the electrolytic cell, current output is stable, accuracy is high, electrode batch testing can be carried out, the occupied area is greatly saved, and the working efficiency and the parallel testing capacity are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolyzed water catalytic electrode stability testing, and particularly relates to a device for testing the stability of an electrolyzed water catalytic electrode. Background Art

[0002] As a renewable energy source, hydrogen energy has the advantages of high energy density, rich resources, wide sources, clean and pollution-free, and diverse utilization forms. It has become a promising clean energy source and has received extensive attention.

[0003] At present, the hydrogen production technology still mainly relies on fossil energy for hydrogen production, but it has inherent carbon pollution problems. The clean electrolyzed water hydrogen production technology has the advantages of simple operation, environmental protection and high efficiency. The electrolyzed water hydrogen production technology includes alkaline electrolyzed water hydrogen production, anion exchange membrane electrolyzed water hydrogen production, high-temperature solid oxide electrolyzed water hydrogen production, proton exchange membrane electrolyzed water hydrogen production, etc. At present, the widely commercialized application is alkaline electrolyzed water hydrogen production, which is applied in multiple green hydrogen projects.

[0004] The electrode is the place where the electrochemical reaction occurs and is also the key to determining the hydrogen production efficiency of electrolyzed water. The electrode not only requires high catalytic activity but also strong durability and can operate for a long time under high current density. The electrolyzed water electrode includes a cathode and an anode, which respectively undergo hydrogen evolution reaction and oxygen evolution reaction. The durability evaluation of the electrode usually requires separately evaluating the performance changes of the cathode and anode during long-term operation. The commonly used methods include evaluating with an electrochemical workstation or evaluating with a short-stack electrolytic cell. The electrochemical workstation can usually only evaluate small-size samples, such as 1 - 10 cm2, and it is difficult to handle large-size samples at high current density. The short-stack electrolytic cell evaluation can only evaluate the comprehensive performance of the cathode and anode, that is, obtain the electrolyzed water voltage, and it is difficult to evaluate the performance of a single electrode, such as the overpotential of the electrode reaction. Moreover, there are problems such as difficult stack assembly, high test energy consumption, and complex device.

[0005] With the continuous growth of the green hydrogen market scale, there is an even more urgent need for the development and verification of new electrodes with high performance and high stability. During the development and verification of new electrodes, the durability test is the most time-consuming and laborious, and the evaluation time usually reaches several thousand to tens of thousands of hours. Therefore, a low-cost multi-channel evaluation device is needed, which can not only realize the parallel evaluation of multiple electrodes, but also reflect the respective performance changes of the cathode and anode, and realize long-cycle automated testing. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a device for testing the stability of an electrolyzed water catalytic electrode, which ensures the reliability when testing the electrode stability and improves the testing ability.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model provides a device for testing the stability of an electrolyzed water catalytic electrode, comprising:

[0009] A main control module;

[0010] A human-computer interaction module, which is bidirectionally electrically connected to the main control module and is used to transmit control signals to the main control module;

[0011] An electrochemical detection module, which is bidirectionally electrically connected to the main control module and is used to transmit the detected electrochemical signals to the main control module;

[0012] A plurality of IGBT power modules; the plurality of IGBT power modules are bidirectionally electrically connected to the main control module and are used to provide voltage signals to the main control module;

[0013] A plurality of electrolytic cells, the input ends of the plurality of electrolytic cells are connected to the plurality of IGBT power modules to receive the voltage signals of the plurality of IGBT power modules; the output ends of the plurality of electrolytic cells are connected to the electrochemical detection module and are used to transmit the electrochemical signals to the electrochemical detection module.

[0014] Further, the electrochemical detection module includes a voltage acquisition module, and the voltage acquisition module includes at least one voltage acquisition card.

[0015] Further, a cathode, an anode and a reference electrode are arranged in the plurality of electrolytic cells, the reference electrode is arranged on one side of the cathode and is not located between the cathode and the anode.

[0016] Further, the cathode, the anode and the reference electrode are connected to the voltage acquisition module, and the voltage acquisition module transmits the electrode voltages between the cathode and the anode and between the cathode and the reference electrode to the main control module respectively.

[0017] Further, the power of the IGBT power module is 500W, the voltage is 0-5V, and the current is 0-100A.

[0018] Further, a temperature control module connected to the main control module is further connected to the plurality of electrolytic cells. The temperature control module includes a thermocouple heating rod and a temperature sensor, and the thermocouple heating rod is connected to the temperature sensor.

[0019] Further, a liquid level control module connected to the main control module is also connected to the plurality of electrolytic cells. The liquid level control module includes a liquid level gauge and a water pump. The liquid level gauge is disposed in the electrolytic cell for monitoring the liquid level data in the electrolytic cell and transmitting the liquid level data to the main control module. One end of the water pump is connected to the liquid level gauge through a pipe, and the other end of the water pump is connected to a pure water tank.

[0020] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0021] A stability testing device for an electrolyzed water catalytic electrode of the present utility model integrates a main control module, a human-machine interaction module, an electrochemical detection module, a plurality of IGBT power modules, and a plurality of electrolytic cells, and can simultaneously perform long-term stability tests on multiple electrodes to solve the problems of low efficiency and inaccuracy in electrode stability testing in traditional electrochemical workstations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Some specific embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings in an exemplary but not restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 is a schematic structural diagram of a stability testing device for an electrolyzed water catalytic electrode provided by the present utility model;

[0024] Figure 2 is a schematic diagram of constant current or constant voltage supply and voltage acquisition of a single-channel IGBT power supply in a stability testing device for an electrolyzed water catalytic electrode provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions of the present utility model will be described clearly and completely hereinafter with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model fall within the protection scope of the present utility model.

[0026] Refer to Figure 1 , the stability testing device for an electrolyzed water catalytic electrode includes: a main control module, a human-machine interaction module, an electrochemical detection module, a plurality of IGBT power modules, and a plurality of electrolytic cells connected to the foregoing plurality of IGBT power modules and the foregoing electrochemical detection module.

[0027] The main control module is simultaneously connected to the aforementioned human-computer interaction module, electrochemistry detection module, and several IGBT power modules respectively. The human-computer interaction module is used to transmit control signals to the aforementioned main control module; the electrochemistry detection module is used to transmit the detected electrochemistry signals to the main control module; and several IGBT power modules are used to provide voltage signals to the main control module.

[0028] Moreover, the input ends of several electrolytic cells are connected to the aforementioned several IGBT power modules to receive the voltage signals of the several IGBT power modules; the output ends of several electrolytic cells are connected to the aforementioned electrochemistry detection module to transmit the detected electrochemistry signals to the aforementioned electrochemistry detection module.

[0029] The IGBT power module has the characteristics of being able to be quickly adjusted, having a high power factor, and a fast response speed. Specifically, one electrolytic cell corresponds to one IGBT power module, whereby independent control of each electrolytic cell can be achieved, improving control accuracy and stability. Also, each electrolytic cell corresponds to a separate IGBT power module. When a failure occurs, it is easier to determine the problem and perform quick repair and replacement. In addition, the IGBT power modules that independently control each electrolytic cell can precisely adjust the electrolysis process as needed, thereby improving production efficiency, energy conservation and consumption reduction, and increasing the reliability of the device during the testing process.

[0030] In a preferred embodiment of the present utility model, 8 electrolytic cells are arranged, and 8 IGBT power modules are correspondingly equipped, thereby forming 8 physically isolated electrode test channels. At the same time, it should be noted that the number of electrolytic cells and IGBT power modules is not limited to 8, and can also be other numbers, such as 2, 4, 6, 10, etc. And the power of the power supply of the aforementioned IGBT power module is controlled at 500W, the voltage is 0 - 5V, and the current is 0 - 100A. And the positive and negative poles of the output port of the aforementioned IGBT power module respectively provide a constant current or a constant voltage to the anode and the cathode.

[0031] At the same time, a temperature control module and a liquid level control module, which are connected to the aforementioned main control module, are also connected to several electrolytic cells.

[0032] The temperature control module is connected to the electrolytic cell and the main control module, and transmits the monitored electrolyte temperature data to the control module. Specifically, the temperature control module includes a thermocouple heating rod and a temperature sensor. The thermocouple heating rod and the temperature sensor are connected and arranged in the aforementioned electrolytic cell, and transmit the signal of the monitored electrolyte temperature data to the main control module. After receiving the above temperature data signal, the main control module determines whether electrolyte heating is required according to the data. If heating is required, a heating signal is sent to the aforementioned thermocouple heating rod. After receiving the above heating signal, the thermocouple heating rod heats the electrolyte.

[0033] The liquid level control module is used to test the liquid level data in the electrolytic cell and transmit it to the main control module to prevent the liquid level in the corresponding electrolytic cell from being too high or too low. Specifically, the liquid level control module includes a liquid level gauge and a water pump. The liquid level gauge is also arranged in the aforementioned electrolytic cell. At the same time, one end of the liquid level gauge is piped to the water pump outside the electrolytic cell, and the other end of the water pump is connected to the pure water tank. When the liquid level gauge detects that the liquid level in the electrolytic cell is too low, it will transmit the liquid level data to the main control module. The main control module will send a liquid supplement signal to the water pump, and the water pump will start to supplement the electrolytic cell with liquid. During the liquid supplement process, the liquid level gauge monitors the liquid level data in real time. When the liquid level reaches the specified level, it will send a liquid level signal to the main control module again, and the main control module will send a signal to stop liquid supplement to the water pump.

[0034] At the same time, in the present utility model, a three - electrode system is arranged in the aforementioned electrolytic cell. Refer to Figure 2 , specifically, it includes a cathode, an anode, and a reference electrode. The reference electrode is arranged on one side of the cathode and is not located between the cathode and the anode. And the ports of the above - mentioned three electrodes are connected to the voltage acquisition module in the aforementioned electrochemical detection module. The voltage acquisition module respectively acquires the voltage between the cathode and the reference electrode and the voltage between the anode and the cathode. Thus, through the reference potential of the reference electrode, the cathode overpotential, the anode overpotential, and the two - electrode electrolysis voltage value can be obtained respectively. The aforementioned voltage acquisition module uses a voltage acquisition card to acquire the voltage data of the three electrodes. After converting the acquired voltage signal into a digital signal, it is transmitted to the aforementioned main control module for data processing and analysis, and the voltage change situation in the electrolytic cell is monitored in real time to realize the automatic adjustment and control of the device.

[0035] In addition, the electrolytic cell in the present utility model is set in a cylindrical shape and is equipped with a sealed top cover. Both the barrel body and the sealed top cover are made of polytetrafluoroethylene material to prevent the outer shell or the inner wall of the electrolytic cell from being corroded by the alkali solution. Of course, the aforementioned electrolytic cell can be set in other shapes as long as it can hold the electrolyte. The aforementioned sealed top cover is provided with three - electrode ports corresponding to the aforementioned three electrodes, a liquid supplement port for supplementing liquid into the electrolytic cell, a heating rod port for accommodating a heating rod, and a sensor port for accommodating a temperature sensor. At the same time, an exhaust port is also opened on the sealed top cover, and a condenser tube is inserted above the exhaust port. When the gas discharged from the aforementioned exhaust port condenses into a liquid, it can flow back into the electrolytic cell through a small hole for recycling.

[0036] The opening diameters of the above - mentioned openings correspond to the sizes of their respective corresponding devices, and the airtightness at the openings is good.

[0037] During specific operations, an operator can select an operation in the aforementioned human-machine interaction module, issue an instruction through the human-machine interaction module, and transmit the instruction to the main control module. Then, the main control module sends a signal to the corresponding module. For example, it can be operations such as manual power control, manual voltage reading, or editing process parameters in the human-machine interaction module. Regarding editing process parameters, it can be setting the specified liquid level or specified temperature of the electrolyte in the electrolytic cell, or parameters such as the voltage value or current value set in the IGBT power module. At the same time, the operator can also intuitively obtain various monitoring data information through the digital display in the human-machine interaction module.

[0038] In summary, for the electrolyzed water catalytic electrode stability test device in the present utility model, the integration of the main control module, the human-machine interaction module, the electrochemical detection module, several IGBT power modules, and several electrolytic cells enables long-term stability tests on multiple electrodes simultaneously, solving the problems of low efficiency and inaccuracy in electrode stability tests in traditional electrochemical workstations. The device is easy to operate, not only has stable current output and high precision, but also has extremely high integration. It can perform batch tests, greatly saving floor space and improving work efficiency and parallel test capabilities.

[0039] The above embodiments are only for illustrating the technical concept and features of the present utility model, and the purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly. It should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An electrolyzed water catalytic electrode stability test device, characterized in that, Including: Main control module; Human-machine interaction module, which is bidirectionally electrically connected to the main control module and is used to transmit control signals to the main control module; Electrochemical detection module, which is bidirectionally electrically connected to the main control module and is used to transmit the detected electrochemical signals to the main control module; Several IGBT power modules; The several IGBT power modules are bidirectionally electrically connected to the main control module and are used to provide voltage signals to the main control module; Several electrolytic cells, the input ends of the several electrolytic cells are connected to the several IGBT power modules to receive the voltage signals of the several IGBT power modules; the output ends of the several electrolytic cells are connected to the electrochemical detection module and are used to transmit the electrochemical signals to the electrochemical detection module.

2. The electrolytic water catalytic electrode stability testing device according to claim 1, wherein The electrochemical detection module includes a voltage acquisition module, and the voltage acquisition module includes at least one voltage acquisition card.

3. The electrolyzed water catalytic electrode stability test device according to claim 2, characterized in that Cathodes, anodes and reference electrodes are arranged in the several electrolytic cells, the reference electrodes are arranged on one side of the cathodes and are not located between the cathodes and the anodes.

4. The electrolyzed water catalytic electrode stability testing device according to claim 3, wherein The cathodes, the anodes and the reference electrode ends are connected to the voltage acquisition module, and the voltage acquisition module respectively transmits the electrode voltages of the cathodes and the anodes, and the cathodes and the reference electrode ends collected to the main control module.

5. A device for testing the stability of an electrolyzed water catalytic electrode according to claim 1, characterized in that, The power of the IGBT power module is 500W, the voltage is 0-5V, and the current is 0-100A.

6. The stability testing device for an electrolyzed water catalytic electrode according to claim 1, wherein A temperature control module connected to the main control module is further connected to the several electrolytic cells. The temperature control module includes a thermocouple heating rod and a temperature sensor, and the thermocouple heating rod is connected to the temperature sensor.

7. An electrolyzed water catalytic electrode stability test device according to claim 1, characterized in that A liquid level control module connected to the main control module is further connected to the several electrolytic cells. The liquid level control module includes a liquid level gauge and a water pump. The liquid level gauge is arranged in the electrolytic cell to monitor the liquid level data in the electrolytic cell and transmit the liquid level data to the main control module; one end of the water pump is connected to the liquid level gauge through a pipe, and the other end of the water pump is connected to a pure water water tank.

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