A portable proton exchange membrane water electrolyser

Abstract

The utility model discloses a portable proton exchange membrane water electrolyzer, including the cathode assembly of the center from inside to outside, it includes hydrogen pipeline and the cathode plate of the circumferential array arrangement around this hydrogen pipeline, the hydrogen pipeline wall has the vent hole, the proton exchange membrane assembly of ring setting in the cathode assembly outside, the utility model discloses a proton exchange membrane replaces traditional lye electrolyte, and combines the coaxial layered integrated structure of cathode and anode, and the equipment performance and safety are significantly improved. The efficient ion conduction characteristics of proton exchange membrane support the stable work of equipment under high current density level, and the hydrogen production period is greatly shortened, and the coaxial extension layout of the cathode and anode plate of the utility model creates the super large scale reaction interface, and the integrated optimization of gas diffusion path, and the generation and separation efficiency of hydrogen and oxygen are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of electrolyzers, specifically a portable proton exchange membrane water electrolyzer. Background Technology

[0002] Hydrogen is a highly efficient, clean, and pollution-free energy source. However, its storage and transportation suffer from drawbacks such as high cost, inconvenience, and construction difficulties. Obtaining hydrogen easily is a challenging problem for utilizing hydrogen energy, especially for portable hydrogen energy devices. Water electrolysis is a simple method for producing hydrogen. If combined with renewable energy power generation technologies such as photovoltaics, wind power, and hydropower, water electrolysis for hydrogen production can be applied on a large scale. This technology is virtually pollution-free, economically viable, and has broad application prospects.

[0003] A search revealed a Chinese patent document disclosing a waterproof and dustproof multi-combination sealed agricultural machinery bearing [Application No.: 202410259283.5, Publication No.: CN118086940A], comprising: a cathode porous transport layer, a hot-pressing encapsulation assembly, and an anode porous transport layer arranged sequentially from bottom to top; the hot-pressing encapsulation assembly includes a cathode frame, a catalyst coating film, and an anode frame stacked sequentially from bottom to top, with the anode frame located on the side near the anode porous transport layer, and the anode porous transport layer having several through holes. While this patent can achieve hydrogen production, its overall structure is complex, inconvenient to carry, and lacks portability. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a portable proton exchange membrane water electrolyzer.

[0005] A portable proton exchange membrane water electrolyzer, characterized in that, from the inside out, it comprises: a centrally located cathode assembly, which includes a hydrogen pipeline and cathode plates arranged in a circumferential array around the hydrogen pipeline, the hydrogen pipeline having vent holes in its wall; a proton exchange membrane assembly surrounding the cathode assembly; an anode assembly surrounding the proton exchange membrane assembly, which includes anode plates corresponding one-to-one with the cathode plates; a plastic shell fitted over the anode assembly; a plastic top cover covering the top of the plastic shell, the top cover having an extended hydrogen quick connector and an integrally formed oxygen quick connector; and cathode and anode terminals located at the bottom of the plastic shell.

[0006] Preferably, the cathode assembly further includes a cathode plastic upper plate integrally formed with the hydrogen quick connector, a cathode lower plate welded to the bottom of the hydrogen pipeline, and the hydrogen pipeline, cathode plate and cathode lower plate are welded to form a titanium electrode conductor.

[0007] Through the above technical solutions, the structural design of the cathode assembly optimizes the flow and conductivity of hydrogen. The integrated cathode plastic upper plate with the hydrogen quick-connector simplifies the connection of the hydrogen pipeline, allowing for smooth and rapid hydrogen transfer to the reaction zone, effectively reducing the risk of leakage and gas stagnation at the connection points. The cathode lower plate, welded to the bottom of the hydrogen pipeline, provides robust support for the structure and ensures the stability of both the hydrogen pipeline and the cathode plate. The welded titanium electrode conductor possesses excellent conductivity and corrosion resistance, making the current transmission of the entire electrode system more reliable and efficient.

[0008] Preferably, the lower cathode plate is fixed to the lower plastic plate and is welded with cathode terminals extending out of the outer shell.

[0009] Through the above technical solutions, the mechanical strength and ease of connection of the components are significantly improved. The design of fixing the cathode lower plate to the plastic lower plate provides additional support and stability, making the entire structure more robust and able to withstand vibrations and pressure changes that may occur during operation. The cathode terminals welded to extend out of the shell facilitate the connection of external interfaces, realizing the dual functions of electrical and mechanical connection. This design not only improves the ease of installation and maintenance, but also ensures a more reliable current conduction path, reducing the possibility of resistance and energy loss at the connection points. At the same time, the cathode terminal design makes the expansion and modular configuration of the equipment more flexible. Users can easily adjust the system configuration according to different application needs without the need for complex modifications or adjustments.

[0010] Preferably, the proton exchange membrane assembly includes a proton exchange membrane, and a cathode catalyst layer, an anode catalyst layer, and two gas diffusion layers disposed on both sides thereof.

[0011] Through the above technical solutions, the efficiency of the proton exchange membrane module has been significantly improved. This integrated design ensures efficient proton transport within the membrane and enhances the rate of electrochemical reactions. Due to the efficient integration of the catalyst layer and the membrane, the current density generated by the reaction increases, thereby improving the hydrogen production rate and overall efficiency of the entire electrolysis unit. Furthermore, the optimization of the two gas diffusion layers not only improves gas distribution but also effectively reduces the diffusion resistance of reactants in the catalyst layer, meaning the system can achieve higher production efficiency during operation. A more uniform gas distribution also helps avoid the formation of hot spots and inefficient areas, thus reducing energy loss and equipment wear.

[0012] Preferably, the anode assembly further includes an anode base plate welded with an anode hollow plate, the hollow plate having a spring guide post inside; a spring inserted into the guide post is welded to one side of the anode plate, the spring pressure pressing the anode plate against the proton exchange membrane assembly, and the bottom of the anode plate has a rounded corner.

[0013] Through the above technical solution, the anode assembly achieves effective pressure distribution and a stable electrochemical reaction environment. The anode base plate, welded with a hollow anode plate, utilizes an internal spring guide post design to provide an adaptive pressure regulation mechanism, ensuring continuous close contact between the anode plate and the proton exchange membrane assembly. The spring's clamping function ensures good interfacial contact between the proton exchange membrane assembly and the anode plate, improving ion transfer efficiency and overall reaction rate. This design helps prevent gaps or uneven pressure distribution between the membrane assembly and the plate, thereby optimizing electrochemical reaction conditions. The rounded corner design at the bottom of the anode plate not only reduces the risk of damage to the assembly during installation and operation but also improves fluid dynamics. The rounded corner facilitates smoother gas and liquid movement at the bottom of the plate, reducing flow resistance and further improving the overall system efficiency.

[0014] Preferably, the anode base plate, the anode hollow plate, and the anode plate form a titanium electrode conductor, and the anode assembly is fixed to the plastic lower plate.

[0015] Through the above technical solutions, the mechanical strength and conductivity of the anode assembly have been further optimized. The titanium electrode conductor, formed by the anode base plate, anode hollow plate, and anode plate, possesses excellent conductivity and corrosion resistance, which is crucial for improving the overall efficiency of the electrolysis system. The application of titanium not only extends the service life of the assembly but also ensures stable current conduction under high current density conditions. This material characteristic significantly improves the reliability and performance stability of the system in harsh environments. The design of fixing the anode assembly to the plastic lower plate provides robust structural support for the assembly. The plastic lower plate serves as insulation protection during installation and simplifies the installation process, making assembly easier and faster. The lightweight nature of the plastic material also helps reduce the overall weight of the system, improving the operability and portability of the equipment.

[0016] Preferably, the anode base plate is welded with an anode terminal extending out of the outer casing.

[0017] The above technical solutions significantly improve the connection and installation efficiency of the anode assembly. The design with welded anode terminals extending beyond the housing provides an efficient and reliable mechanical and electrical connection. This design facilitates connection of the anode assembly to external power sources and other components, simplifying the assembly process. This structure allows for direct connection of the screw posts to external equipment or wiring, enhancing the overall system's installation flexibility. Since the anode terminals are integral to the structure, this direct welding method also reduces resistance in the current transmission path, contributing to improved efficiency of the entire electrochemical system. The screw post design provides additional mechanical support, ensuring higher stability and durability of the anode assembly under load and vibration conditions. This enables the anode assembly to maintain reliable performance in various application environments, reducing failures caused by loose connections or vibration.

[0018] Preferably, the plastic shell and top cover are made of acid-resistant plastic; the cathode assembly and anode assembly are assembled at the bottom of the shell through a plastic lower plate, and the plastic shell, proton exchange membrane and anode plate together form an anode water chamber.

[0019] Through the above technical solutions, the corrosion resistance and structural integrity of the entire electrochemical system are further enhanced. The selection of acid-resistant plastic as the material for the outer shell and top cover provides the system with excellent chemical corrosion resistance, especially when handling electrolytes in highly acidic environments. This material prevents erosion and damage to the outer shell. The cathode and anode assemblies are assembled to the bottom of the shell via a plastic lower plate, achieving a stable and insulated foundation. This design simplifies the assembly process, enhances the structural support of the system, and ensures reliable isolation between the two electrodes, reducing the risk of short circuits or other related electrical faults. The plastic shell, proton exchange membrane, and anode plate together form the anode water chamber. This layout helps create a closed and stable reaction environment, effectively controlling and maintaining the conditions required during electrolysis. The closed anode water chamber optimizes water flow and reactant distribution, ensuring efficient operation of the proton exchange membrane and uniform reaction at the anode plate.

[0020] Preferably, a liquid level sensor is installed on the outside of the plastic top cover.

[0021] Through the above technical solutions, the system's operational monitoring capabilities have been significantly enhanced. The design of mounting a liquid level sensor on the outside of the plastic cover allows users to monitor the liquid level in the anode water chamber in real time. This is crucial for ensuring the continuity and stability of the electrolysis process, and the application of the liquid level sensor provides the system with the possibility of automated and intelligent management. When the liquid level reaches the preset upper or lower limits, the sensor can send a signal to the control system, triggering corresponding response measures. For example, if the liquid level is too low, the water replenishment mechanism can be automatically activated to avoid a decrease in electrolysis efficiency or equipment damage due to insufficient liquid; if the liquid level is too high, an alarm can be triggered or liquid intake can be stopped to prevent overflow. Furthermore, this real-time monitoring capability also helps optimize the management of water and chemical replenishment, improving resource utilization efficiency. By reducing the frequency of manual inspections, the system's operational efficiency and safety are improved, while also simplifying the operation process and reducing manual intervention.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. This invention utilizes a proton exchange membrane to replace the traditional alkaline electrolyte, combined with a coaxial, layered integrated structure for the anode and cathode, significantly improving equipment performance and safety. The high-efficiency ion conduction characteristics of the proton exchange membrane support stable operation of the equipment at high current densities, drastically shortening the hydrogen production cycle. Through the synergistic innovation of the circumferential arrangement of the cathode central tube and the elastic clamping mechanism of the anode, the number of components is significantly reduced, resulting in a compact and lightweight overall structure. The combination of a corrosion-resistant shell and liquid level monitoring function eliminates the risk of electrolyte leakage while providing excellent portability and adaptability.

[0024] 2. The coaxial extended layout of the anode and cathode plates in this invention creates an ultra-large-scale reaction interface. Combined with the integrated optimization of the gas diffusion path, it significantly improves the generation and separation efficiency of hydrogen and oxygen. Hydrogen at the cathode is rapidly discharged through the central channel, while oxygen at the anode is efficiently discharged through radial gaps, greatly shortening the gas-liquid phase migration distance and reducing energy transmission loss. This design achieves high-speed gas production at a relatively low operating voltage, with current conversion efficiency reaching industry-leading levels. Simultaneously, the significant optimization of energy consumption allows it to flexibly adapt to the fluctuating characteristics of renewable energy sources, providing continuous and stable gas supply support for distributed hydrogen supply scenarios. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the longitudinal section structure of this utility model;

[0028] Figure 4This is a schematic diagram of the cathode assembly structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the cross-sectional structure of the cathode assembly of this utility model;

[0030] Figure 6 This is a schematic diagram of the anode assembly structure of this utility model.

[0031] In the diagram: 1. Hydrogen quick connector; 2. Plastic top cover; 5. Oxygen quick connector; 7. Plastic outer shell; 8. Anode assembly; 9. Plastic bottom plate; 10. Anode terminal; 12. Cathode terminal; 13. Cathode assembly; 14. Proton exchange membrane assembly; 17. Liquid level sensor; 81. Anode plate; 82. Spring; 83. Hollow anode plate; 84. Spring guide post; 85. Anode bottom plate; 86. Rounded corners; 131. Cathode plastic top plate; 132. Hydrogen pipeline; 133. Vent hole; 134. Cathode plate; 135. Cathode bottom plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figures 1 to 6 This utility model provides a technical solution:

[0034] A portable proton exchange membrane water electrolyzer, characterized in that, from the inside out, it comprises: a cathode assembly 13 located at the center, which includes a hydrogen pipeline 132 and cathode plates 134 arranged in a circular array around the hydrogen pipeline 132, wherein the hydrogen pipeline 132 has vent holes 133 in its wall; a proton exchange membrane assembly 14 surrounding the cathode assembly 13; an anode assembly 8 surrounding the proton exchange membrane assembly 14, which includes anode plates 81 corresponding one-to-one with the cathode plates 134; a plastic shell 7 sleeved on the outside of the anode assembly 8; a plastic top cover 2 covering the top of the plastic shell 7, the top cover 2 having an extended hydrogen quick connector 1 and an integrally formed oxygen quick connector 5; and a cathode terminal 12 and an anode terminal 10 at the bottom of the plastic shell 7.

[0035] Specifically, the cathode assembly 13 also includes a cathode plastic upper plate 131 integrated with the hydrogen quick connector 1 and a cathode lower plate 135 welded to the bottom of the hydrogen pipeline 132. The hydrogen pipeline 132, cathode plate 134, and cathode lower plate 135 are welded to form a titanium electrode conductor. The structural design of the cathode assembly 13 optimizes the flow and conductivity of hydrogen. The cathode plastic upper plate 131 integrated with the hydrogen quick connector 1 simplifies the connection of the hydrogen pipeline 132, allowing hydrogen to be smoothly and quickly transported to the reaction zone, effectively reducing the risk of leakage and gas stagnation at the connection. The cathode lower plate 135 welded to the bottom of the hydrogen pipeline 132 provides robust support for the structure and ensures the stability of the hydrogen pipeline 132 and the cathode plate 134. The titanium electrode conductor formed by welding has excellent conductivity and corrosion resistance, making the current transmission of the entire electrode system more reliable and efficient. This design not only improves the current carrying capacity of the assembly but also enhances its durability and corrosion resistance, making it suitable for demanding operating environments. Titanium electrode conductors achieve higher electrochemical reaction efficiency and improve equipment operating efficiency by reducing resistance and energy loss.

[0036] Specifically, the lower cathode plate 135 is fixed to the lower plastic plate 9 and has cathode terminals welded to it, extending beyond the outer shell. This significantly improves the mechanical strength and ease of connection of the component. The design of fixing the lower cathode plate 135 to the lower plastic plate 9 provides additional support and stability, making the entire structure more robust and able to withstand vibrations and pressure changes that may occur during operation. The cathode terminals welded to the outer shell facilitate the connection of external interfaces, achieving both electrical and mechanical connectivity. This design not only improves the ease of installation and maintenance but also ensures a more reliable current conduction path, reducing the possibility of resistance and energy loss at connections. Simultaneously, the cathode terminal design allows for more flexible expansion and modular configuration of the equipment. Users can easily adjust the system configuration according to different application needs without complex modifications or adjustments. Overall, this design improves the overall performance of the equipment, making the system more efficient and reliable in practical applications and able to maintain an optimized state over the long term.

[0037] Specifically, the proton exchange membrane module 14 includes a proton exchange membrane, a cathode catalyst layer, an anode catalyst layer, and two gas diffusion layers disposed on both sides thereon, significantly improving the efficiency of the proton exchange membrane module 14. This integrated design ensures efficient proton transport within the membrane and enhances the rate of electrochemical reactions. Due to the efficient integration of the catalyst layer and the membrane, the current density generated by the reaction increases, thereby improving the hydrogen production rate and overall efficiency of the entire electrolysis unit. Furthermore, the optimization of the two gas diffusion layers not only improves gas distribution but also effectively reduces the diffusion resistance of reactants in the catalyst layer, meaning the system can achieve higher production efficiency during operation. A more uniform gas distribution also helps avoid the formation of hot spots and inefficient areas, thus reducing energy loss and equipment wear. Overall, the proton exchange membrane module 14 significantly outperforms traditional designs in terms of durability and efficiency. This allows the equipment to maintain high-performance output during long-term operation, reducing downtime and maintenance frequency, thereby improving the economics and return on investment. At the same time, this solution offers flexibility, suitable for various application scenarios of different sizes, from small portable devices to large industrial installations, all benefiting from this design optimization.

[0038] Specifically, the anode assembly 8 also includes an anode base plate 85 with a hollow anode plate 83 welded to it. A spring guide post 84 is provided inside the hollow plate 83. A spring 82, into which the guide post is inserted, is welded to one side of the anode plate 81. The pressure of the spring 82 presses the anode plate 81 tightly against the proton exchange membrane assembly 14. The bottom of the anode plate 81 has a rounded corner 86. The anode assembly 8 achieves effective pressure distribution and a stable electrochemical reaction environment. The anode base plate 85 with the welded hollow anode plate 83, through the design of the internal spring guide post 84, provides an adaptive pressure regulation mechanism, enabling the anode plate 81 to maintain continuous close contact with the proton exchange membrane assembly 14. The pressing function of the spring 82 ensures good interfacial contact between the proton exchange membrane assembly 14 and the anode plate 81, improving ion transfer efficiency and overall reaction rate. This design helps prevent gaps or uneven pressure distribution between the membrane module and the plate, thereby optimizing the conditions for the electrochemical reaction. The rounded corner 86 at the bottom of the anode plate 81 not only reduces the risk of damage to the module during installation and operation but also improves the fluid dynamics. The rounded corner 86 facilitates smoother movement of gas and liquid at the bottom of the plate, reduces flow resistance, and further improves the efficiency of the entire system. This combination of technologies provides stability and long-term durability to the entire electrolysis system, while also improving the performance output and reliability of the modules, ensuring efficient operation even under harsh conditions. Users will benefit from greater operational stability and a longer service life in practical applications.

[0039] Specifically, the anode base plate 85, anode hollow plate 83, and anode plate 81 form a titanium electrode conductor, and the anode assembly 8 is fixed to the plastic lower plate 9, further optimizing the mechanical strength and conductivity of the anode assembly 8. The titanium electrode conductor formed by the anode base plate 85, anode hollow plate 83, and anode plate 81 possesses excellent conductivity and corrosion resistance, which is crucial for improving the overall efficiency of the electrolysis system. The application of titanium not only extends the service life of the assembly but also ensures stable current conduction under high current density conditions. This material characteristic significantly improves the reliability and performance stability of the system in harsh environments. The design of fixing the anode assembly 8 to the plastic lower plate 9 provides robust structural support for the assembly. The plastic lower plate 9 serves as insulation protection during installation and simplifies the installation process, making assembly easier and faster. The lightweight nature of the plastic material also helps reduce the overall weight of the system, improving the operability and portability of the equipment. Overall, this technical solution ensures a tight fit between the anode plate 81 and its supporting structure, improving the overall performance output of the anode assembly 8 and enhancing the system's conductivity and long-term stability. At the same time, the design features that facilitate maintenance and replacement also provide users with greater operational convenience and economy.

[0040] Specifically, the anode base plate 85 is welded with anode terminals extending beyond the outer shell, significantly improving the connection and installation efficiency of the anode assembly 8. The design of welding anode terminals extending beyond the outer shell provides an efficient and reliable mechanical and electrical connection method. This design facilitates the connection of the anode assembly 8 to external power sources and other components, simplifying the assembly process. This structure allows for direct connection of screw posts to external equipment or wiring, enhancing the installation flexibility of the entire system. Since the anode terminals are part of the structure, this direct welding method also reduces resistance in the current transmission path, contributing to improved efficiency of the entire electrochemical system. The screw post design provides additional mechanical support, ensuring higher stability and durability of the anode assembly 8 under load and vibration conditions. This enables the anode assembly 8 to maintain reliable performance in various application environments, reducing failures caused by loose connections or vibration. In summary, this technical solution achieves efficient connection and secure fixation of the anode assembly 8, enhances the overall conductivity and mechanical stability of the system, reduces maintenance burden, and provides long-term reliability and system durability.

[0041] Specifically, the plastic shell 7 and the top cover 2 are made of acid-resistant plastic. The cathode assembly 13 and the anode assembly 8 are assembled to the bottom of the shell via a plastic lower plate 9. The plastic shell 7, together with the proton exchange membrane assembly 14 and the anode plate 81, forms the anode water chamber, further enhancing the corrosion resistance and structural integrity of the entire electrochemical system. The selection of acid-resistant plastic as the material for the shell and top cover provides the system with excellent chemical corrosion resistance, especially when handling electrolytes in highly acidic environments, preventing erosion and damage to the shell. The assembly of the cathode assembly 13 and the anode assembly 8 to the bottom of the shell via the plastic lower plate 9 creates a stable and insulated foundation. This design simplifies the assembly process, enhances the structural support of the system, and ensures reliable isolation between the electrodes, reducing the risk of short circuits or other related electrical faults. The plastic shell 7, together with the proton exchange membrane assembly 14 and the anode plate 81, forms the anode water chamber. This layout helps create a closed and stable reaction environment, effectively controlling and maintaining the conditions required during electrolysis. The enclosed anode water chamber optimizes water flow and reactant distribution, ensuring efficient operation of the proton exchange membrane assembly 14 and uniform reaction of the anode plate 81. This integrated design not only improves the system's durability and performance stability but also provides users with a reliable, low-maintenance operating environment through material selection and structural optimization. The overall sealing and corrosion resistance of the electrochemical system further guarantee the equipment's service life and safety under harsh chemical conditions.

[0042] Specifically, a liquid level sensor 17 is installed on the outside of the plastic cover 2, significantly enhancing the system's operational monitoring capabilities. This design allows users to monitor the liquid level in the anode water chamber in real time. This is crucial for ensuring the continuity and stability of the electrolysis process. The application of the liquid level sensor 17 enables automated and intelligent management of the system. When the liquid level reaches preset upper or lower limits, the sensor 17 sends a signal to the control system, triggering corresponding response measures. For example, if the liquid level is too low, a water replenishment mechanism can be automatically activated to prevent a decrease in electrolysis efficiency or equipment damage due to insufficient liquid; if the liquid level is too high, an alarm can be triggered or liquid intake can be stopped to prevent overflow. Furthermore, this real-time monitoring capability also helps optimize the management of water and chemical replenishment, improving resource utilization efficiency. By reducing the frequency of manual inspections, the system's operational efficiency and safety are improved, while also simplifying the operating procedures and reducing manual intervention.

[0043] In summary, this design provides electrochemical systems with a higher level of automation and more convenient management, ensuring that the equipment can operate normally and safely under various operating conditions.

[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A portable proton exchange membrane water electrolyzer, characterized in that, From the inside out, it includes: a cathode assembly (13) located at the center, which includes a hydrogen pipeline (132) and cathode plates (134) arranged in a circular array around the hydrogen pipeline (132), the hydrogen pipeline (132) having vent holes (133) in its wall; a proton exchange membrane assembly (14) surrounding the cathode assembly (13); an anode assembly (8) surrounding the proton exchange membrane assembly (14), which includes an anode plate (81) corresponding to the position of the cathode plate (134); a plastic shell (7) fitted around the anode assembly (8); a plastic top cover (2) covering the top of the plastic shell (7), the top cover having a protruding hydrogen quick connector (1) and an integrally formed oxygen quick connector (5); and a cathode terminal (12) and an anode terminal (10) at the bottom of the plastic shell (7).

2. The water electrolyzer according to claim 1, characterized in that: The cathode assembly (13) further includes a cathode plastic upper plate (131) integrally formed with the hydrogen quick connector (1) and a cathode lower plate (135) welded to the bottom of the hydrogen pipeline (132). The hydrogen pipeline (132), cathode plate (134) and cathode lower plate (135) are welded together to form a titanium electrode conductor.

3. The water electrolyzer according to claim 2, characterized in that: The cathode lower plate (135) is fixed to the plastic lower plate (9) and is welded with cathode terminals (12) extending out of the outer shell to form cathode terminals.

4. The water electrolyzer according to claim 1, characterized in that: The proton exchange membrane assembly (14) includes a proton exchange membrane, and a cathode catalyst layer, an anode catalyst layer and two gas diffusion layers disposed on both sides thereof.

5. The water electrolyzer according to claim 1, characterized in that: The anode assembly (8) further includes an anode base plate (85) with an anode hollow plate (83) welded on it. The hollow plate (83) is provided with a spring guide post (84). A spring (82) inserted into the guide post (84) is welded on one side of the anode plate (81). The spring pressure presses the anode plate (81) against the proton exchange membrane assembly (14). The bottom of the anode plate (81) is provided with a rounded corner (86).

6. The water electrolyzer according to claim 5, characterized in that: The anode base plate (85), anode hollow plate (83) and anode plate (81) form a titanium electrode conductor, and the anode assembly (8) is fixed to the plastic lower plate (9).

7. The water electrolyzer according to claim 6, characterized in that: The anode base plate (85) is welded with an anode terminal (10) extending out of the outer shell to form an anode terminal.

8. The water electrolyzer according to claim 1, characterized in that: The plastic shell (7) and the top cover (2) are made of acid-resistant plastic; the cathode assembly (13) and the anode assembly (8) are assembled at the bottom of the shell (7) through the plastic lower plate (9), and the plastic shell (7), the proton exchange membrane, and the anode plate (81) together form the anode water cavity.

9. The water electrolyzer according to claim 1, characterized in that: A liquid level sensor (17) is installed on the outside of the plastic cover (2).

Images