Explosion-proof voltage inspection cabinet and electrolytic cell

Abstract

The utility model discloses an explosion-proof voltage inspection cabinet and an electrolytic bath. The explosion-proof voltage inspection cabinet comprises a positive voltage cabinet, and a high-voltage acquisition board, a low-voltage acquisition board, a communication board card and a current transformer which are arranged in the positive voltage cabinet, wherein the positive pressure cabinet is filled with positive pressure clean gas; external interfaces of the high-voltage acquisition board, the low-voltage acquisition board, the communication board card and the current transformer are integrated on one interface board in an aviation plug interface form, the interface board is fixed on the positive-voltage cabinet, and an aviation plug interface on the interface board is exposed outside the positive-voltage cabinet. According to the utility model, the first-area explosion-proof grade requirement is met in the form of the positive-pressure explosion-proof cabinet, and the total voltage of the electrolytic cell can be measured.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology using electrolyzers, specifically to an explosion-proof voltage inspection cabinet and an electrolyzer. Background Technology

[0002] The power source for hydrogen production in an electrolyzer hydrogen production system is the application of a certain voltage to the two electrodes of the electrolyzer, causing water to decompose into oxygen and hydrogen. Furthermore, the normality of the voltage across a single electrolyzer cell reflects its operating status, representing the membrane performance and the activity status of the anode and cathode of the unit cell. Therefore, the system is equipped with a single-cell voltage monitoring device.

[0003] From the perspective of explosion-proof standards, hydrogen production systems belong to Zone 1 equipment. Currently, voltage inspection equipment on the market is non-explosion-proof. In addition, it can only test the voltage of a single cell and does not detect the total voltage and total current of the electrolyzer. Moreover, it uses DC power supply output voltage and current values, which are not the actual voltage values ​​at both ends of the electrolyzer. This is because voltage values ​​are easily affected by line loss. The resistance value is inversely proportional to the cross-section of the cable, resulting in the DC power supply voltage value being significantly higher than that of the electrolyzer. It is inaccurate to analyze the data of the electrolyzer using this value. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the voltage inspection devices currently on the market are non-explosion-proof devices and can only test the voltage of a single cell.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An explosion-proof voltage inspection cabinet includes a positive pressure cabinet 10, and a high-voltage acquisition board 20, a low-voltage acquisition board 30, a communication board 40, and a current transformer 50 disposed inside the positive pressure cabinet 10; wherein, the positive pressure cabinet 10 is filled with positive pressure clean gas; the external interfaces of the high-voltage acquisition board 20, the low-voltage acquisition board 30, the communication board 40, and the current transformer 50 are integrated on an interface board 60 in the form of aviation plug interfaces, and the interface board 60 is fixed on the positive pressure cabinet 10, and the aviation plug interfaces on the interface board 60 are exposed on the outside of the positive pressure cabinet 10.

[0007] In one embodiment of this utility model, the high-voltage acquisition board 20 has a 4-pin aviation connector, which is connected to the total voltage interface of the electrolytic cell during use.

[0008] In one embodiment of this utility model, multiple low-voltage acquisition boards 30 are provided, and they are connected to multiple single-cell voltage interfaces of the electrolytic cell through their corresponding aviation plug interfaces.

[0009] In one embodiment of this utility model, multiple current transformers 50 are provided and connected to the current detection interface of the electrolytic cell through their corresponding aviation plug interfaces.

[0010] In one embodiment of this utility model, the terminal device is connected to the communication board 40 via an aviation plug interface to exchange data collected by the high voltage acquisition board 20, the low voltage acquisition board 30, and the current transformer 50.

[0011] In one embodiment of this utility model, a power supply 80 is also provided inside the positive pressure cabinet 10, and the power supply 80 is connected to the high voltage acquisition board 20, the low voltage acquisition board 30, and the communication board 40.

[0012] In one embodiment of this utility model, the explosion-proof voltage inspection cabinet further includes a positive pressure control component 70; the positive pressure control component 70 includes an exhaust valve 71, an inlet valve 72, a positive pressure controller, a pressure detection sensor 74, and a temperature detection sensor 75; wherein, the exhaust valve 71, the inlet valve 72, the pressure detection sensor 74, and the temperature detection sensor 75 are located inside the positive pressure cabinet 10, and the positive pressure controller is located outside the positive pressure cabinet 10; and the positive pressure controller is connected to the pressure detection sensor 74, the temperature detection sensor 75, the exhaust valve 71, and the inlet valve 72; the pipeline corresponding to the exhaust valve 71 is provided with a positive pressure outlet; the pipeline corresponding to the inlet valve 72 is provided with a positive pressure inlet, and both the positive pressure outlet and the positive pressure inlet are provided on the interface plate 60.

[0013] In one embodiment of this utility model, the power interface of the positive pressure control component 70 is provided on the interface board 60, and is connected to an external power source through a power interface connection cable.

[0014] In one embodiment of this utility model, the positive pressure cabinet 10 can be installed near the electrolytic cell by wall mounting or by horizontal pull-out placement.

[0015] This utility model provides an electrolytic cell that utilizes the explosion-proof voltage inspection cabinet described above.

[0016] Compared with existing technologies, the advantages of this invention are: by using a positive pressure cabinet filled with positive pressure clean gas, it meets the explosion-proof requirements of the electrolytic cell voltage monitoring device, making it suitable for use in Zone 1 explosive environments. Additionally, it is equipped with a high-voltage sampling board to collect the actual total voltage and current values ​​of the electrolytic cell, and a low-voltage sampling board to collect the voltage values ​​of individual cells. The device is connected to the electrolytic cell via an interface to monitor the voltage of individual cells, the total voltage, and the total current. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an explosion-proof voltage inspection cabinet according to an embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram of the interface of the voltage inspection device according to an embodiment of the present invention.

[0019] Figure 3This is a schematic diagram of the connection of the voltage inspection device according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of a positive pressure cabinet according to an embodiment of the present invention. Detailed Implementation

[0021] To facilitate understanding of the technical solution of this utility model by those skilled in the art, the technical solution of this utility model will now be further described in conjunction with the accompanying drawings.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] Please see Figure 1 and Figure 2 As shown, this utility model provides an explosion-proof voltage inspection cabinet, including a positive pressure cabinet 10, and a high-voltage acquisition board 20, a low-voltage acquisition board 30, a communication board 40, and a current transformer 50 disposed inside the positive pressure cabinet 10. The positive pressure cabinet 10 is filled with positive pressure clean gas. The external interfaces of the high-voltage acquisition board 20, low-voltage acquisition board 30, communication board 40, and current transformer 50 are integrated onto an interface board 60 using aviation plug-in interfaces. The interface board 60 is fixed to the positive pressure cabinet 10, and the aviation plug-in interfaces on the interface board 60 are exposed outside the positive pressure cabinet 10.

[0024] In one embodiment of this utility model, electrolytic cells are not yet standardized products, and single-cell testing uses either terminals or copper busbars with pre-drilled wiring holes. Using an aviation connector makes connection to the electrolytic cell easier. The male end of the aviation connector is soldered to the cable, while the other end has a pre-drilled terminal connector compatible with the electrolytic cell, allowing for customized design based on the electrolytic cell's interface type. The aviation connector is easy to disassemble and reassemble on-site, allowing for direct assembly and wiring at the electrolytic cell factory. On-site wiring is completed simply by connecting the aviation connector, significantly saving time and improving work efficiency. The aviation connector's withstand voltage rating can reach 1500V / 60s.

[0025] Please see Figures 1 to 3 As shown, in one embodiment of this utility model, the circuits specifically integrated in the high-voltage acquisition board 20 and the low-voltage acquisition board 30 are not improved by this utility model. They are conventional voltage acquisition circuits, except that their external interfaces or acquisition ports are in the form of aviation plug interfaces.

[0026] In this embodiment, the high-voltage acquisition board 20 has a 4-pin aviation connector, which connects to the total voltage interface of the electrolytic cell during use. The 4-pin aviation connector includes two sets of voltage detection, one for use and one for backup. Furthermore, the high-voltage acquisition board 20 has two current and two voltage channels, with the voltage level adjustable according to the actual total voltage of the electrolytic cell to improve sampling accuracy. The high-voltage acquisition board 20 is available in three types: 125V, 425V, and 725V, covering all currently available electrolytic cells.

[0027] Please see Figures 1 to 3 As shown, in this embodiment, a 35-pin aviation connector is used for single-cell detection of the electrolytic cell. Considering future maintenance and repair, a certain number of spare pins are reserved. One aviation connector can connect up to 32 single-cell electrolytic cells. Each cable connector is clearly marked to avoid incorrect connection to the electrolytic cell channel number. Multiple low-voltage acquisition boards 30 are provided, each connecting to multiple single-cell voltage interfaces of the electrolytic cell via its corresponding aviation connector interface to detect the single-cell voltage of the electrolytic cell. The measurement range is -5 to 5VDC. The low-voltage acquisition board 30 has signal isolation function, and the sampling accuracy can reach up to 1mV. The number of low-voltage acquisition boards 30 can be flexibly configured according to the number of electrolytic cell sections, with a maximum of 1024 channels. The aviation connector interface corresponding to the low-voltage acquisition board 30 is also a multi-pin aviation connector.

[0028] In this embodiment, the current transformer 50 has an accuracy of less than 0.5% and a maximum current value of 4000A. Multiple transformers are installed and connected to the current detection interface of the electrolytic cell through their corresponding aviation plug interfaces.

[0029] In this embodiment, the communication board 40 uses an RJ45 interface and the communication protocol is Modbus TCP. It is used to connect to supporting software or other control systems such as PLCs, host computers, and other terminal devices. The terminal device connects to the communication board 40 via a corresponding aviation plug interface to exchange data collected by the high-voltage acquisition board 20, the low-voltage acquisition board 30, and the current transformer 50. Furthermore, the communication board 40 has a heartbeat detection function for communication with both the low-voltage acquisition board 30 and the high-voltage acquisition board 20 to ensure normal communication.

[0030] In this embodiment, the sampling period for the single-cell voltage on the host computer interface is 10ms, and the display method is a bar chart, which enables high-precision real-time monitoring of the status and performance of a single battery cell. Real-time analysis and processing of the single-cell voltage data set allows for comprehensive and rapid fault diagnosis.

[0031] In this embodiment, the positive pressure cabinet 10 is also equipped with a power supply 80, which is connected to the high-voltage acquisition board 20, the low-voltage acquisition board 30, and the communication board 40. A 24V switching power supply 80 is used to supply power to the high-voltage acquisition board 20, the low-voltage acquisition board 30, and the communication board 40 to avoid external power fluctuations affecting the system's data acquisition.

[0032] Please see Figures 1 to 4 As shown, in one embodiment of this utility model, the explosion-proof voltage inspection cabinet further includes a positive pressure control component 70. The positive pressure control component 70 includes an exhaust valve 71, an inlet valve 72, a positive pressure controller, a pressure detection sensor 74, and a temperature detection sensor 75. The exhaust valve 71, inlet valve 72, pressure detection sensor 74, and temperature detection sensor 75 are located inside the positive pressure cabinet 10, while the positive pressure controller is located outside the positive pressure cabinet 10. The pipeline corresponding to the exhaust valve 71 is provided with a positive pressure outlet, and the pipeline corresponding to the inlet valve 72 is provided with a positive pressure inlet. Both the positive pressure outlet and the positive pressure inlet are located on the interface plate 60. Furthermore, the positive pressure controller is connected to the pressure detection sensor 74, temperature detection sensor 75, exhaust valve 71, and inlet valve 72. By detecting pressure and temperature values, it controls the opening and closing of the exhaust valve 71 and the inlet valve 72 to ensure that the positive pressure cabinet 10 is always in a positive pressure state.

[0033] In this embodiment, the interface board 60 is also provided with a standard pressure interface and an exhaust interface. The standard pressure interface is directly connected to the atmosphere, and the exhaust interface is used for manual exhaust. Furthermore, the positive pressure controller is a commercially available conventional controller.

[0034] In this embodiment, the explosion-proof principle of the positive pressure cabinet 10 is based on a medium-isolation ignition source explosion-proof measure. That is, the electrical components used by the user, such as voltage monitoring devices, are installed in a cabinet filled with positive pressure clean gas. This prevents flammable and explosive mixtures in the external environment from contacting the electrical sparks or dangerous temperatures generated by the electrical components during normal operation, thus achieving the purpose of electrical explosion protection. Before the system starts operating, the positive pressure control component 70 is first activated to maintain the positive pressure of the electrolytic cell voltage monitoring device. This prevents hydrogen from entering the positive pressure cabinet 10 and causing an explosion. If the positive pressure system fails, the system will issue an alarm.

[0035] In this embodiment, the PCB board of the equipment and other heat-generating components inside the positive pressure cabinet 10 can also play a good role in heat dissipation. The positive pressure cabinet 10 is equipped with a temperature detection sensor 75, which removes heat through air intake and exhaust to ensure the normal operation of the components inside the cabinet.

[0036] In this embodiment, the positive pressure cabinet 10 can be installed near the electrolytic cell by wall mounting or by horizontal pull-out placement.

[0037] Please see Figures 1 to 4 As shown, this utility model also provides an electrolytic cell that uses the explosion-proof voltage inspection cabinet described above.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] The above-described embodiments are merely examples of implementation methods of the utility model. The scope of protection of this utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model.

Claims

1. An explosion-proof voltage inspection cabinet, characterized in that, It includes a positive pressure cabinet (10), and inside the positive pressure cabinet (10) are a high voltage acquisition board (20), a low voltage acquisition board (30), a communication board (40), and a current transformer (50); wherein, the positive pressure cabinet (10) is filled with positive pressure clean gas; the external interfaces of the high voltage acquisition board (20), the low voltage acquisition board (30), the communication board (40) and the current transformer (50) are integrated on an interface board (60) in the form of aviation plug interface, and the interface board (60) is fixed on the positive pressure cabinet (10), and the aviation plug interface on the interface board (60) is exposed outside the positive pressure cabinet (10).

2. The explosion-proof voltage inspection cabinet according to claim 1, characterized in that, The high voltage acquisition board (20) has a 4-pin aviation connector, which is connected to the total voltage interface of the electrolytic cell during use.

3. The explosion-proof voltage inspection cabinet according to claim 1, characterized in that, Multiple low-voltage acquisition boards (30) are set up and connected to multiple single-cell voltage interfaces of the electrolytic cell through their corresponding aviation plug interfaces.

4. The explosion-proof voltage inspection cabinet according to claim 1, characterized in that, Multiple current transformers (50) are set up and connected to the current detection interface of the electrolytic cell through their corresponding aviation plug interface.

5. The explosion-proof voltage inspection cabinet according to claim 1, characterized in that, The terminal device connects to the communication board (40) via the corresponding aviation plug interface and exchanges the data collected by the high voltage acquisition board (20), the low voltage acquisition board (30) and the current transformer (50).

6. The explosion-proof voltage inspection cabinet according to claim 1, characterized in that, The positive pressure cabinet (10) is also equipped with a power supply (80), which is connected to the high voltage acquisition board (20), the low voltage acquisition board (30), and the communication board (40).

7. The explosion-proof voltage inspection cabinet according to claim 1, characterized in that, The explosion-proof voltage inspection cabinet also includes a positive pressure control component (70); the positive pressure control component (70) includes an exhaust valve (71), an inlet valve (72), a positive pressure controller, a pressure detection sensor (74), and a temperature detection sensor (75); wherein the exhaust valve (71), the inlet valve (72), the pressure detection sensor (74), and the temperature detection sensor (75) are located inside the positive pressure cabinet (10), and the positive pressure controller is located outside the positive pressure cabinet (10); and the positive pressure controller is connected to the pressure detection sensor (74), the temperature detection sensor (75), the exhaust valve (71), and the inlet valve (72); the pipeline corresponding to the exhaust valve (71) is provided with a positive pressure outlet; the pipeline corresponding to the inlet valve (72) is provided with a positive pressure inlet, and both the positive pressure outlet and the positive pressure inlet are located on the interface plate (60).

8. The explosion-proof voltage inspection cabinet according to claim 7, characterized in that, The power interface of the positive pressure control component (70) is located on the interface board (60) and is connected to an external power source via a power interface connection cable.

9. The explosion-proof voltage inspection cabinet according to claim 1, characterized in that, The positive pressure cabinet (10) can be installed near the electrolytic cell by wall mounting or horizontal pull-out placement.

10. An electrolytic cell, characterized in that, The explosion-proof voltage inspection cabinet according to any one of claims 1-9 is applied.

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