Water electrolysis hydrogen production device

Abstract

The utility model discloses a water electrolysis hydrogen production device which comprises an electrolytic tank assembly and a locking mechanism, and a first end pressing plate, a first end polar plate, a first bipolar plate, a middle polar plate, a second bipolar plate, a second end polar plate and a second end pressing plate are sequentially arranged and are mutually abutted along the length direction of the water electrolysis hydrogen production device; the locking mechanism is used for locking the electrolytic cell assembly and comprises a first fastening piece, a second fastening piece and a connecting piece, and the connecting piece sequentially penetrates through the first end pressing plate, the first bipolar plate, the middle polar plate, the second bipolar plate and the second end pressing plate in the length direction of the water electrolysis hydrogen production device; the first fastening piece and the second fastening piece are both connected to the connecting piece, and the first fastening piece and the second fastening piece are jointly used for limiting movement of the first end pressing plate and the second end pressing plate relative to the connecting piece. The water electrolysis hydrogen production device disclosed by the utility model can effectively prevent the middle part from drooping.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic hydrogen production, in particular to a water electrolytic hydrogen production device. Background Art

[0002] In the relevant technology, hydrogen energy is a clean energy. The core equipment for producing green hydrogen is a water electrolysis hydrogen production device, which uses electricity to electrolyze water to produce hydrogen. The main body of the water electrolysis hydrogen production device includes end pressure plates, sealing gaskets, plates, electrodes, diaphragms and other components. Among them, two adjacent plates and diaphragms and other parts will form an electrolysis chamber. The electrolyte is electrolyzed in the electrolysis chamber to produce hydrogen and oxygen. In order to increase the production of hydrogen, multiple electrolysis chambers can be set on the water electrolysis hydrogen production device.

[0003] However, due to the large number of electrolysis chambers, the length of the water electrolysis hydrogen production device will become longer and longer. As the length of the water electrolysis hydrogen production device increases, the electrode plate in the middle of the water electrolysis hydrogen production device will tend to fall, which will easily lead to the water electrolysis hydrogen production device being unsealed, and even causing dangerous situations such as leakage, spraying, and short circuit. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a water electrolysis hydrogen production device, which can effectively prevent the middle part from sagging.

[0005] The water electrolysis hydrogen production device according to the embodiment of the utility model comprises:

[0006] An electrolytic cell assembly, comprising a first end pressing plate, a second end pressing plate, a first end electrode plate, a second end electrode plate, a first bipolar plate, a second bipolar plate and a middle electrode plate, wherein along the length direction of the water electrolysis hydrogen production device, the first end pressing plate, the first end electrode plate, the first bipolar plate, the middle electrode plate, the second bipolar plate, the second end electrode plate and the second end pressing plate are sequentially arranged and abut against each other, the first end electrode plate and the first bipolar plate form an electrolysis chamber, the first bipolar plate and the middle electrode plate form the electrolysis chamber, the second bipolar plate and the middle electrode plate form the electrolysis chamber, and the second end electrode plate and the second bipolar plate form the electrolysis chamber;

[0007] A locking mechanism is used to lock the electrolytic cell assembly, and the locking mechanism includes a first fastener, a second fastener and a connecting piece, and the connecting piece is sequentially penetrated through the first end pressure plate, the first bipolar plate, the intermediate plate, the second bipolar plate and the second end pressure plate along the length direction of the water electrolysis hydrogen production device; the first fastener and the second fastener are both connected to the connecting piece, and the first fastener and the second fastener are jointly used to limit the movement of the first end pressure plate and the second end pressure plate relative to the connecting piece.

[0008] The water electrolysis hydrogen production device according to the embodiment of the utility model has at least the following beneficial effects: the first end pressure plate, the first bipolar plate, the middle plate, the second bipolar plate and the second end pressure plate are penetrated by the connecting piece in the locking mechanism, and the first end pressure plate and the second end pressure plate are restricted from moving relative to the connecting piece by the first fastener and the second fastener, and the connecting piece can play the role of supporting the first bipolar plate, the middle plate and the second bipolar plate, thereby effectively preventing the middle part of the water electrolysis hydrogen production device from sagging. Specifically, the water electrolysis hydrogen production device can effectively prevent the middle part from sagging.

[0009] According to some embodiments of the water electrolysis hydrogen production device of the present utility model, the locking mechanism also includes a first elastic member and a second elastic member, the first elastic member and the second elastic member are both sleeved on the connecting member, the two ends of the first elastic member are respectively abutted against the first fastener and the first end pressure plate, and the two ends of the second elastic member are respectively abutted against the second fastener and the second end pressure plate.

[0010] According to some embodiments of the water electrolysis hydrogen production device of the present utility model, the locking mechanism also includes a first elastic guide member, the first elastic guide member includes a first main body portion and a first protruding portion, the first protruding portion is connected to the first main body portion, and protrudes relative to the first main body portion along the axial direction of the first main body portion, the first protruding portion is located between the connecting member and the first elastic member, and the two ends of the first main body portion are respectively abutted against the first fastener and the first elastic member.

[0011] According to some embodiments of the water electrolysis hydrogen production device of the present utility model, the locking mechanism also includes a second elastic guide member, the second elastic guide member includes a second main body portion and a second protruding portion, the second protruding portion is connected to the second main body portion, and protrudes relative to the second main body portion along the axial direction of the second main body portion, the second protruding portion is located between the connecting member and the second elastic member, and the two ends of the second main body portion are respectively abutted against the second fastener and the second elastic member.

[0012] According to some embodiments of the water electrolysis hydrogen production device of the present utility model, the locking mechanism also includes a first connecting guide, the first connecting guide includes a third main body portion and a third protruding portion, the third protruding portion is connected to the third main body portion, and protrudes relative to the third main body portion along the axial direction of the third main body portion, the third protruding portion is located between the first end pressure plate and the connecting member, and the two ends of the third main body portion are respectively abutted against the first elastic member and the first end pressure plate.

[0013] According to some embodiments of the water electrolysis hydrogen production device of the present utility model, the locking mechanism also includes a second connecting guide member, the second connecting guide member includes a fourth main body portion and a fourth protruding portion, the fourth protruding portion is connected to the fourth main body portion, and protrudes relative to the fourth main body portion along the axial direction of the fourth main body portion, the fourth protruding portion is located between the second end pressure plate and the connecting member, and the two ends of the fourth main body portion are respectively abutted against the second elastic member and the second end pressure plate.

[0014] According to some embodiments of the water electrolysis hydrogen production device of the present utility model, the locking mechanism also includes a first insulating member and a second insulating member, two sides of the first insulating member are respectively abutted against the first end pressure plate and the connecting member, and two sides of the second insulating member are respectively abutted against the second end pressure plate and the connecting member.

[0015] According to some embodiments of the water electrolysis hydrogen production device of the present utility model, the bottom of the first end electrode plate and the second end electrode plate are both provided with an alkali liquid pipeline and an alkali liquid flow channel, and the top of the first end electrode plate and the second end electrode plate are both provided with a hydrogen collection pipeline, a hydrogen collection flow channel, an oxygen collection pipeline and an oxygen collection flow channel.

[0016] According to the water electrolysis hydrogen production device of some embodiments of the present utility model, both the first end pressure plate and the second end pressure plate are provided with lifting holes.

[0017] According to some embodiments of the water electrolysis hydrogen production device of the present utility model, a plurality of the locking mechanisms are provided, and the plurality of the locking mechanisms are arranged around the center of the first end pressure plate.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 Schematic diagram of a water electrolysis hydrogen production device according to some embodiments of the utility model;

[0021] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 3 It is a schematic diagram of the locking mechanism in the water electrolysis hydrogen production device of the first embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the locking mechanism in the water electrolysis hydrogen production device of the second embodiment of the utility model;

[0024] Figure 5 It is a side view schematic diagram of a water electrolysis hydrogen production device according to some embodiments of the utility model.

[0025] Reference numerals:

[0026] Water electrolysis hydrogen production device 10, first end pressure plate 100, second end pressure plate 200, first end plate 300, alkali liquid pipeline 310, hydrogen collection pipeline 320, oxygen collection pipeline 330, second end plate 400, first bipolar plate 500, second bipolar plate 600, middle plate 700, locking mechanism 800, first fastener 810, second fastener 820, connector 830, first elastic member 840, second elastic member 850, first elastic guide Part 860, a first main body part 861, a first protrusion 862, a second elastic guide part 870, a second main body part 871, a second protrusion 872, a first connecting guide part 890, a third main body part 891, a third protrusion 892, a second connecting guide part 900, a fourth main body part 901, a fourth protrusion 902, a first insulating part 910, a second insulating part 920, a third insulating part 930, a fourth insulating part 940, and a third bipolar plate 1000. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] Please refer to Figures 1 to 5In some embodiments, the water electrolysis hydrogen production device 10 includes: an electrolytic cell assembly and a locking mechanism 800. The electrolytic cell assembly includes a first end pressure plate 100, a second end pressure plate 200, a first end electrode plate 300, a second end electrode plate 400, a first bipolar plate 500, a second bipolar plate 600 and a middle electrode plate 700. The number of the first bipolar plate 500, the second bipolar plate 600 and the middle electrode plate 700 is not specifically limited. Among them, along the length direction of the water electrolysis hydrogen production device 10, the first end pressure plate 100, the first end electrode plate 300, the first bipolar plate 500, the middle electrode plate 700, the second bipolar plate 600, the second end electrode plate 400 and the second end pressure plate 200 are arranged in sequence and abut against each other. That is, the two sides of the first end plate 300 are respectively abutted against the first end plate 100 and the first bipolar plate 500, the two sides of the first middle plate 700 are respectively abutted against the first bipolar plate 500 and the second bipolar plate 600, and the two sides of the second end plate 400 are respectively abutted against the second end plate 200 and the second bipolar plate 600. The first end plate 300 and the first bipolar plate 500 form an electrolysis chamber, which is a key component of the electrolyzer and is used to electrolyze water into hydrogen and oxygen under the action of direct current. The first bipolar plate 500 and the second bipolar plate 600 can each form an electrolysis chamber with the middle plate 700, and the second end plate 400 and the second bipolar plate 600 form an electrolysis chamber. It can be imagined that the water electrolysis hydrogen production device 10 has multiple electrolysis chambers, so that hydrogen can be produced on a large scale. Among them, the electrolysis chamber also includes a hydrogen evolution electrode, a diaphragm, a sealing gasket and an oxygen evolution electrode. The diaphragm divides the electrolysis chamber into two parts, the cathode and the anode. When water is electrolyzed, hydrogen and oxygen are generated at the cathode and the anode respectively. Hydrogen and oxygen cannot pass through the diaphragm and flow out from the hydrogen and oxygen flow channels on the electrode plates respectively. The water and ions in the alkaline solution can pass through the diaphragm in the electrolysis chamber to ensure the connectivity of the entire electrolysis circuit and the smooth progress of the water electrolysis reaction.

[0033] The locking mechanism 800 is used to lock the electrolytic cell assembly. Through the locking mechanism 800, the first end plate 100, the first end plate 300, the first bipolar plate 500, the middle plate 700, the second bipolar plate 600, the second end plate 400 and the second end plate 200 can be abutted against each other to form an electrolysis chamber. The locking mechanism 800 includes a first fastener 810, a second fastener 820 and a connector 830. The connector 830 is sequentially arranged along the length direction of the water electrolysis hydrogen production device 10 through the first end plate 100, the first bipolar plate 500, the middle plate 700, the second bipolar plate 600 and the second end plate 200. The first fastener 810 and the second fastener 820 are both connected to the connector 830, and the first fastener 810 and the second fastener 820 are used together to limit the movement of the first end plate 100 and the second end plate 200 relative to the connector 830. Specifically, the first end platen 100, the first bipolar plate 500, the middle plate 700, the second bipolar plate 600 and the second end platen 200 are penetrated by the connector 830 in the locking mechanism 800, and the first end platen 100 and the second end platen 200 are jointly restricted by the first fastener 810 and the second fastener 820 to move relative to the connector 830. After that, the connector 830 can play a role in supporting the first bipolar plate 500, the middle plate 700 and the second bipolar plate 600, thereby effectively preventing the middle part of the water electrolysis hydrogen production device 10 (the first bipolar plate 500, the middle plate 700 and the second bipolar plate 600 are located in the middle of the water electrolysis hydrogen production device 10) from sagging. Specifically, the water electrolysis hydrogen production device 10 can effectively prevent the middle part from sagging. That is, the water electrolysis hydrogen production device 10 forms a cage-type self-supporting structure to improve and avoid the tendency of some plates in the middle part of the water electrolysis hydrogen production device 10 to fall under the action of gravity.

[0034] In addition, please refer to Figure 2 The electrolytic cell assembly further includes a third bipolar plate 1000, which can be used to participate in forming an electrolytic chamber. It should be noted that through holes can be provided on the first bipolar plate 500 and the second bipolar plate 600 for the connector 830 to pass through, and the third bipolar plate 1000 is not provided with a through hole, and the connector 830 does not pass through the third bipolar plate 1000. A through hole can also be provided on the third bipolar plate 1000 for the connector 830 to pass through, which can be determined according to actual conditions.

[0035] To continue, please refer to Figure 2After the connector 830 passes through the first end plate 100, the first bipolar plate 500, the middle plate 700, the second bipolar plate 600 and the second end plate 200, the first fastener 810 and the second fastener 820 work together to form multiple electrolysis chambers between the first end plate 100, the first end plate 300, the first bipolar plate 500, the middle plate 700, the second bipolar plate 600, the second end plate 400 and the second end plate 200. The connector 830 may be a connecting rod. After a through hole is set on the first end plate 100, the first end plate 300, the first bipolar plate 500, the middle plate 700, the second bipolar plate 600, the second end plate 400 and the second end plate 200, the connecting rod is passed through and then fixed by the first fastener 810 and the second fastener 820. The first fastener 810 and the second fastener 820 can be connected to the connector 830 via threads, which can facilitate disassembly and assembly by the staff.

[0036] Furthermore, the electrolyte in the water electrolysis hydrogen production device 10 is an alkaline solution formed by dissolving potassium hydroxide or sodium hydroxide in pure water, and the mass concentration of the alkaline solution is 15% to 35%. The alkaline solution enters the electrolytic cell for electrolysis to produce hydrogen, and oxygen is also produced while producing hydrogen.

[0037] Furthermore, the first end plate 300 and the second end plate 400 are provided with terminal plates on their sides for connecting to the negative pole of the power supply of the water electrolysis hydrogen production device 10. The middle plate 700 is provided with a terminal plate on its side for connecting to the positive pole of the power supply of the water electrolysis hydrogen production device 10.

[0038] Furthermore, the first end pressing plate 100 and the second end pressing plate 200 are square structures, made of carbon steel or stainless steel, and are nickel or chromium plated on the surface.

[0039] Further, the first end plate 300 and the second end plate 400 are square structures, made of carbon steel or stainless steel, and nickel or chromium plated on the surface. One side of the first end plate 300 is tightly connected to the first end plate 100, and the other side constitutes the cathode of the electrolysis chamber, and the first end plate 300 in the cathode water electrolysis area is arranged with a uniformly distributed concave-convex structure, which forms the cathode chamber of the electrolysis chamber. The first end plate 300 is connected to the negative pole of the water electrolysis power supply through the wiring board on it, which is used to connect the electrolysis circuit. The number of wiring boards on the first end plate 300 is not specifically limited. Similarly, one side of the second end plate 400 is tightly connected to the second end plate 200, and the other side constitutes the cathode of the electrolysis chamber, and the second end plate 400 in the cathode water electrolysis area is arranged with a uniformly distributed concave-convex structure, which forms the cathode chamber of the electrolysis chamber. The second end plate 400 is connected to the negative electrode of the water electrolysis power source through the terminal plate thereon, so as to connect the electrolysis circuit. The number of the terminal plates on the second end plate 400 is not specifically limited.

[0040] Further, the middle plate 700 is a square structure, made of carbon steel or stainless steel, and nickel or chromium plated on the surface. The middle plate 700 is connected to the positive electrode of the water electrolysis power supply through the terminal board on it, and is used to connect the electrolysis circuit. Both sides of the middle plate 700 constitute the anode of the electrolysis chamber, and the middle plate 700 is arranged with a uniformly distributed concave-convex structure in the anode water electrolysis area, and the concave-convex structure forms the anode chamber of the electrolysis chamber.

[0041] Furthermore, the first bipolar plate 500 and the second bipolar plate 600 are square structures, made of carbon steel or stainless steel, and nickel or chromium plated on the surface. One side of the first bipolar plate 500 constitutes the cathode of the electrolysis chamber, and the other side constitutes the anode of the electrolysis chamber, and a uniformly distributed concave-convex structure is arranged on the first bipolar plate 500 in the cathode and anode water electrolysis regions, and the concave-convex structure forms the cathode and anode chambers of the electrolysis chamber. Similarly, one side of the second bipolar plate 600 constitutes the cathode of the electrolysis chamber, and the other side constitutes the anode of the electrolysis chamber, and a uniformly distributed concave-convex structure is arranged on the second bipolar plate 600 in the cathode and anode water electrolysis regions, and the concave-convex structure forms the cathode and anode chambers of the electrolysis chamber.

[0042] Furthermore, the hydrogen evolution electrode is a square mesh structure and is made of metal nickel. In order to further improve the catalytic activity of the hydrogen evolution electrode, there is a layer of highly active catalyst on the surface of the hydrogen evolution electrode, and the catalyst is a binary alloy or multi-element alloy composed of metals such as nickel, aluminum, iron, platinum, palladium, chromium, cobalt, and manganese. The hydrogen evolution electrode is installed at the cathode of the electrolysis chamber and is closely connected to the concave-convex structure of the cathode of the plate.

[0043] Furthermore, the diaphragm is a square diaphragm, woven from polyphenylene sulfide fibers, or made of a polyphenylene sulfide fiber mesh coated with a zirconium oxide polymer slurry. The diaphragm divides the electrolysis chamber into two chambers, the cathode and the anode, allowing only water and ions in the alkali solution to pass through the diaphragm, while the hydrogen and oxygen produced by the cathode and the anode are isolated by the diaphragm, ensuring the connectivity of the entire electrolysis circuit and the smooth progress of the water electrolysis reaction, while preventing the explosion hazard caused by the mutual penetration of hydrogen and oxygen.

[0044] Furthermore, the sealing gasket is a square ring structure, and the sealing gasket is a modified polytetrafluoro gasket made of at least one of carbon fiber, polyphenylene sulfide or molybdenum disulfide as a reinforcing filler. The sealing gasket is pressed by the pole plates on both sides to seal the electrolytic chamber and prevent the pole plates on both sides of the sealing gasket from contacting and causing a short circuit in the electrolytic chamber.

[0045] Furthermore, the oxygen evolution electrode is a square mesh structure and is made of metal nickel. In order to further improve the catalytic activity of the oxygen evolution electrode, the surface of the oxygen evolution electrode is roughened by etching, sandblasting and other processes to increase the specific surface area of ​​the oxygen evolution electrode, thereby increasing the catalytic activity of the oxygen evolution electrode. The oxygen evolution electrode is installed at the anode of the electrolysis chamber and is closely connected to the concave-convex structure of the anode of the plate.

[0046] Further, the first end plate 300 and the second end plate 400 are only used as cathode plates, the middle plate 700 is only used as anode plates, and one side of the first bipolar plate 500 and the second bipolar plate 600 is used as cathode plates, and the other side is used as anode plates. The first end plate 300 and the second end plate 400 have a serrated sealing structure only at the edge of one side constituting the electrolysis chamber, and the middle plate 700, the first bipolar plate 500, and the second bipolar plate 600 have serrated sealing structures on both sides.

[0047] The locking mechanism 800 needs to ensure the stability and sealing of the electrolyzer. As the core component of water electrolysis hydrogen production, the internal structure and components of the electrolyzer need to remain stable and sealed to prevent leakage of electrolyte and intrusion of external impurities. Therefore, in order to make the locking effect of the locking mechanism 800 better, an elastic member can be provided. For details, please refer to Figure 3 and Figure 4 In some embodiments, the locking mechanism 800 further includes a first elastic member 840 and a second elastic member 850. The first elastic member 840 and the second elastic member 850 are both sleeved on the connecting member 830, and the two ends of the first elastic member 840 abut against the first fastener 810 and the first end pressure plate 100, respectively, and the two ends of the second elastic member 850 abut against the second fastener 820 and the second end pressure plate 200, respectively. The above-mentioned abutment method can be direct abutment or indirect abutment. Among them, the first elastic member 840 and the second elastic member 850 can be springs or disc springs. The disc spring has the function of pre-tightening and anti-loosening. It can increase the contact area between the bolt or nut and the surface of the part, thereby protecting the part and effectively locking the part to prevent the surface of the part from being worn. Secondly, the disc spring has a variable stiffness characteristic, and its stiffness is usually less than the stiffness of the connected member 830. This means that when there is an external load, the residual pre-tightening force on the screw or bolt will be greater, so that the pre-tightening effect of the screw is better. In the case of impact or alternating loads, the disc spring can play an effective anti-loosening role. In addition, the disc spring can also increase the vertical force, thereby increasing the friction force to prevent the screw and nut from loosening. Specifically, after the first fastener 810 and the second fastener 820 are threadedly connected to the connecting member 830, the disc spring can be used for pre-tightening to prevent loosening.

[0048] For further information, please refer to Figure 3In some embodiments, the locking mechanism 800 further includes a first elastic guide 860. The first elastic guide 860 includes a first body portion 861 and a first protruding portion 862. The first protruding portion 862 is connected to the first body portion 861 and protrudes relative to the first body portion 861 along the axial direction of the first body portion 861. The first protruding portion 862 is located between the connecting member 830 and the first elastic member 840. The two ends of the first body portion 861 are respectively abutted against the first fastener 810 and the first elastic member 840. When the locking mechanism 800 is installed, the first elastic guide 860 can play a role in supporting, guiding and fixing the first elastic member 840. That is, when the locking mechanism 800 is installed, the first elastic guide 860 can guide the first elastic member 840. After that, the first protruding portion 862 is located between the connecting member 830 and the first elastic member 840 so that the first elastic guide 860 can play a role in fixing and supporting the first elastic member 840.

[0049] For further information, please refer to Figure 4 In some embodiments, the locking mechanism 800 further includes a second elastic guide 870. The second elastic guide 870 includes a second body portion 871 and a second protruding portion 872. The second protruding portion 872 is connected to the second body portion 871 and protrudes relative to the second body portion 871 along the axial direction of the second body portion 871. The second protruding portion 872 is located between the connecting member 830 and the second elastic member 850. The two ends of the second body portion 871 are respectively abutted against the second fastener 820 and the second elastic member 850. When the locking mechanism 800 is installed, the second elastic guide 870 can play a role in supporting, guiding and fixing the second elastic member 850. That is, when the locking mechanism 800 is installed, the second elastic guide 870 can guide the second elastic member 850. After that, the second protruding portion 872 is located between the connecting member 830 and the second elastic member 850 so that the second elastic guide 870 can play a role in fixing and supporting the second elastic member 850.

[0050] For further information, please refer to Figure 3In some embodiments, the locking mechanism 800 further includes a first connecting guide 890. The first connecting guide 890 includes a third body portion 891 and a third protruding portion 892. The third protruding portion 892 is connected to the third body portion 891 and protrudes relative to the third body portion 891 along the axial direction of the third body portion 891. The third protruding portion 892 is located between the first end pressure plate 100 and the connecting member 830. The two ends of the third body portion 891 are respectively abutted against the first elastic member 840 and the first end pressure plate 100. When the locking mechanism 800 is installed, the first connecting guide 890 can play a role in supporting, guiding and fixing the connecting member 830. That is, when the locking mechanism 800 is installed, one end of the connecting member 830 can be guided by the first connecting guide 890. After that, the third protruding portion 892 is located between the connecting member 830 and the first end plate 300, so that the first connecting guide 890 can play a role in fixing and supporting the connecting member 830.

[0051] Further, it is conceivable that the two ends of the connecting member 830 are respectively connected to the first fastener 810 and the second fastener 820, so that one end of the connecting member 830 is supported by the first connecting guide 890, and correspondingly, the other end of the connecting member 830 can be supported by the second connecting guide 900. For details, please refer to Figure 4 In some embodiments, the locking mechanism 800 further includes a second connecting guide 900. The second connecting guide 900 includes a fourth body portion 901 and a fourth protruding portion 902. The fourth protruding portion 902 is connected to the fourth body portion 901 and protrudes relative to the fourth body portion 901 along the axial direction of the fourth body portion 901. The fourth protruding portion 902 is located between the second end pressure plate 200 and the connecting member 830. The two ends of the fourth body portion 901 are respectively abutted against the second elastic member 850 and the second end pressure plate 200. When the locking mechanism 800 is installed, the second connecting guide 900 can play the role of supporting, guiding and fixing the connecting member 830. That is, when installing the locking mechanism 800, the other end of the connecting member 830 can be guided by the second connecting guide member 900 (the first connecting guide member 890 guides one end of the connecting member 830), and then, the fourth protrusion 902 is located between the connecting member 830 and the second end plate 400, so that the second connecting guide member 900 can play the role of fixing and supporting the connecting member 830.

[0052] For further information, please refer to Figure 3 and Figure 4In some embodiments, the locking mechanism 800 further includes a first insulating member 910 and a second insulating member 920, wherein two sides of the first insulating member 910 are respectively in contact with the first end pressing plate 100 and the connecting member 830, and two sides of the second insulating member 920 are respectively in contact with the second end pressing plate 200 and the connecting member 830. The first end pressing plate 100 may be made of metal, and the connecting member 830 may also be made of metal. Therefore, after the first insulating member 910 is located between the first end pressing plate 100 and the connecting member 830, the first insulating member 910 effectively prevents the current from being conducted between the first end pressing plate 100 and the connecting member 830, thereby effectively preventing the water electrolysis hydrogen production device 10 from short-circuiting. Similarly, the second end pressure plate 200 can be made of metal, and the connecting member 830 can also be made of metal. Therefore, after the second insulating member 920 is located between the second end pressure plate 200 and the connecting member 830, the second insulating member 920 effectively prevents current from being conducted between the second end pressure plate 200 and the connecting member 830, thereby effectively avoiding a short circuit in the water electrolysis hydrogen production device 10.

[0053] For further information, please refer to Figure 3 and Figure 4 In some embodiments, the locking mechanism 800 further includes a third insulating member 930, which is located between the first elastic member 840 and the first connecting guide member 890. The third insulating member 930 can play an insulating role, thereby effectively preventing the water electrolysis hydrogen production device 10 from short-circuiting.

[0054] For further information, please refer to Figure 3 and Figure 4 In some embodiments, the locking mechanism 800 further includes a fourth insulating member 940, which is located between the second elastic member 850 and the second connecting guide member 900. The fourth insulating member 940 can play an insulating role, thereby effectively preventing the water electrolysis hydrogen production device 10 from short-circuiting.

[0055] For further information, please refer to Figure 1 and Figure 5In some embodiments, an alkali liquid pipeline 310 and an alkali liquid flow channel are provided at the bottom of the first end plate 300 and the second end plate 400, and a hydrogen collecting pipeline 320, a hydrogen collecting flow channel, an oxygen collecting pipeline 330 and an oxygen collecting flow channel are provided at the top of the first end plate 300 and the second end plate 400. Specifically, the alkali liquid pipeline 310 and the alkali liquid flow channel are used to supply alkali liquid or pure water to the water electrolysis hydrogen production device 10. The hydrogen collecting pipeline 320, the hydrogen collecting flow channel, the oxygen collecting pipeline 330 and the oxygen collecting flow channel are used to collect and discharge the hydrogen and oxygen produced by the water electrolysis hydrogen production device 10. Among them, the water electrolysis hydrogen production device 10 can avoid the situation of electrolyte and gas retention at the top of the electrolysis chamber during the water electrolysis reaction, optimize the flow field distribution of the electrolyte in the electrolysis chamber, and improve the electrolysis efficiency of the water electrolysis hydrogen production device 10.

[0056] In addition, there are several waist-shaped holes at the bottom of the first bipolar plate 500 and the second bipolar plate 600, which are used as channels for supplying alkaline solution or pure water to the water electrolysis hydrogen production device 10. There are several direct current channels in and out of the electrolysis chamber on the upper side of the waist-shaped holes at the bottom of the first bipolar plate 500 and the second bipolar plate 600, which are used to supply alkaline solution or pure water to each electrolysis chamber. There are direct current channels entering the electrolysis chamber on both sides of the first bipolar plate 500 and the second bipolar plate 600. There are several waist-shaped holes on the top of the first bipolar plate 500 and the second bipolar plate 600 for collecting and discharging the hydrogen and oxygen produced by the water electrolysis hydrogen production device 10. There are several direct current channels in and out of the electrolysis chamber on the lower side of the waist-shaped holes on the top of the first bipolar plate 500 and the second bipolar plate 600 for discharging the hydrogen and oxygen produced in each electrolysis chamber. The direct current channel for discharging hydrogen is only on the cathode side of the first bipolar plate 500 and the second bipolar plate 600, and the direct current channel for discharging oxygen is only on the anode side of the first bipolar plate 500 and the second bipolar plate 600.

[0057] The middle plate 700 has several waist-shaped holes at the bottom, which are used as channels for supplying alkali solution or pure water to the water electrolysis hydrogen production device 10. On the upper side of the waist-shaped holes at the bottom of the middle plate 700, there are several direct current channels entering and exiting the electrolysis chamber for supplying alkali solution or pure water to each electrolysis chamber. There are direct current channels entering the electrolysis chamber on both sides of the middle plate 700. The middle plate 700 has several waist-shaped holes at the top, which are used to collect and discharge the hydrogen and oxygen produced by the water electrolysis hydrogen production device 10. The middle plate 700 has several direct current channels entering and exiting the electrolysis chamber at the lower side of the waist-shaped holes at the top of the middle plate 700 for discharging the hydrogen and oxygen produced in each electrolysis chamber. The direct current channel for discharging hydrogen is only on the cathode side of the middle plate 700, and the direct current channel for discharging oxygen is only on the anode side of the middle plate 700.

[0058] Further, in the water electrolysis hydrogen production device 10, the terminal plate on the middle plate 700 is connected to the positive pole of the power supply, and the terminal plates on the left and right end plates are connected to the negative pole of the power supply to form an electrolysis circuit. The alkali solution enters the alkali solution flow channel from the alkali solution pipeline 310 at the bottom of the first end plate 300 and the second end plate 400 and flows into the water electrolysis hydrogen production device 10. The alkali solution entering the alkali solution flow channel enters the electrolysis chamber through the alkali solution direct flow channel of each electrolysis chamber. The alkali solution entering the electrolysis chamber is evenly distributed throughout the electrolysis chamber for electrolysis to produce hydrogen. The hydrogen and oxygen produced by electrolysis are discharged from the hydrogen and oxygen direct flow channels at the top of the electrolysis chamber into the hydrogen flow channel and the oxygen flow channel, and finally gathered into the hydrogen flow channel and the oxygen flow channel at the top of the first end plate 300 and the second end plate 400, and discharged from the hydrogen collection pipeline 320 and the oxygen collection pipeline 330 at the top of the first end plate 300 and the second end plate 400.

[0059] When the water electrolysis hydrogen production device 10 needs maintenance or overhaul, the alkali solution is extracted from the alkali solution pipeline 310 at the bottom of the first end plate 300 and the second end plate 400 to drain the alkali solution in the water electrolysis hydrogen production device 10, and then disassembled for maintenance and overhaul.

[0060] Further, in some embodiments, a hoisting hole is provided on both the first end platen 100 and the second end platen 200. Specifically, after the hoisting holes are provided on the first end platen 100 and the second end platen 200, when the water electrolysis hydrogen production device 10 is moved, the hoisting holes can be hooked by hooks, thereby moving the water electrolysis hydrogen production device 10. The hoisting holes can be located at the top of the first end platen 100 and the second end platen 200.

[0061] Furthermore, in some embodiments, a plurality of locking mechanisms 800 are provided, and the plurality of locking mechanisms 800 are arranged around the center of the first end platen 100. Specifically, the arrangement of the plurality of locking mechanisms 800 can not only ensure good sealing of the water electrolysis hydrogen production device 10, but also effectively prevent the middle part of the water electrolysis hydrogen production device 10 from sagging after the plurality of connectors 830 are passed through the first end platen 100, the first bipolar plate 500, the middle plate 700, the second bipolar plate 600 and the second end platen 200.

[0062] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A water electrolysis hydrogen production device, characterized in that: include: An electrolytic cell assembly, comprising a first end pressing plate, a second end pressing plate, a first end electrode plate, a second end electrode plate, a first bipolar plate, a second bipolar plate and a middle electrode plate, wherein along the length direction of the water electrolysis hydrogen production device, the first end pressing plate, the first end electrode plate, the first bipolar plate, the middle electrode plate, the second bipolar plate, the second end electrode plate and the second end pressing plate are sequentially arranged and abut against each other, the first end electrode plate and the first bipolar plate form an electrolysis chamber, the first bipolar plate and the middle electrode plate form the electrolysis chamber, the second bipolar plate and the middle electrode plate form the electrolysis chamber, and the second end electrode plate and the second bipolar plate form the electrolysis chamber; A locking mechanism is used to lock the electrolytic cell assembly, and the locking mechanism includes a first fastener, a second fastener and a connecting piece, and the connecting piece is sequentially penetrated through the first end pressure plate, the first bipolar plate, the intermediate plate, the second bipolar plate and the second end pressure plate along the length direction of the water electrolysis hydrogen production device; the first fastener and the second fastener are both connected to the connecting piece, and the first fastener and the second fastener are jointly used to limit the movement of the first end pressure plate and the second end pressure plate relative to the connecting piece.

2. The water electrolysis hydrogen production device according to claim 1, characterized in that: The locking mechanism also includes a first elastic member and a second elastic member, both of which are sleeved on the connecting member, two ends of the first elastic member respectively abut against the first fastener and the first end pressure plate, and two ends of the second elastic member respectively abut against the second fastener and the second end pressure plate.

3. The water electrolysis hydrogen production device according to claim 2, characterized in that: The locking mechanism also includes a first elastic guide member, which includes a first main body portion and a first protruding portion. The first protruding portion is connected to the first main body portion and protrudes relative to the first main body portion along the axial direction of the first main body portion. The first protruding portion is located between the connecting member and the first elastic member. Both ends of the first main body portion are respectively abutted against the first fastener and the first elastic member.

4. The water electrolysis hydrogen production device according to claim 3, characterized in that: The locking mechanism also includes a second elastic guide member, which includes a second main body portion and a second protruding portion. The second protruding portion is connected to the second main body portion and protrudes relative to the second main body portion along the axial direction of the second main body portion. The second protruding portion is located between the connecting member and the second elastic member. The two ends of the second main body portion are respectively abutted against the second fastener and the second elastic member.

5. The water electrolysis hydrogen production device according to claim 2, characterized in that: The locking mechanism also includes a first connecting guide member, which includes a third main body portion and a third protruding portion. The third protruding portion is connected to the third main body portion and protrudes relative to the third main body portion along the axial direction of the third main body portion. The third protruding portion is located between the first end pressure plate and the connecting member, and the two ends of the third main body portion are respectively abutted against the first elastic member and the first end pressure plate.

6. The water electrolysis hydrogen production device according to claim 5, characterized in that: The locking mechanism also includes a second connecting guide member, which includes a fourth main body portion and a fourth protruding portion. The fourth protruding portion is connected to the fourth main body portion and protrudes relative to the fourth main body portion along the axial direction of the fourth main body portion. The fourth protruding portion is located between the second end pressure plate and the connecting member, and the two ends of the fourth main body portion are respectively abutted against the second elastic member and the second end pressure plate.

7. The water electrolysis hydrogen production device according to claim 2, characterized in that: The locking mechanism further includes a first insulating member and a second insulating member, wherein two sides of the first insulating member are respectively in contact with the first end pressure plate and the connecting member, and two sides of the second insulating member are respectively in contact with the second end pressure plate and the connecting member.

8. The water electrolysis hydrogen production device according to claim 1, characterized in that: The bottom of the first end plate and the second end plate are both provided with an alkali liquid pipeline and an alkali liquid flow channel, and the top of the first end plate and the second end plate are both provided with a hydrogen collection pipeline, a hydrogen collection flow channel, an oxygen collection pipeline and an oxygen collection flow channel.

9. The water electrolysis hydrogen production device according to claim 1, characterized in that: The first end pressing plate and the second end pressing plate are both provided with lifting holes.

10. The water electrolysis hydrogen production device according to claim 1, characterized in that: There are multiple locking mechanisms, and the multiple locking mechanisms are arranged around the center of the first end pressure plate.

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