Water electrolysis hydrogen production device and auxiliary tool thereof

Abstract

The utility model relates to the technical field of water electrolysis hydrogen production, in particular to a water electrolysis hydrogen production device and an auxiliary tool thereof. The water electrolysis hydrogen production device comprises an end plate assembly which comprises an upper end plate and a lower end plate which are arranged up and down, and the upper end plate is provided with a gas circuit port, a water circuit port and indication marks corresponding to the gas circuit port and the water circuit port respectively; the bipolar plate and membrane electrode assembly is clamped between the upper end plate and the lower end plate, the bipolar plate and membrane electrode assembly comprises bipolar plates and membrane electrodes which are alternately arranged, protruding tabs are formed on the side portions of the bipolar plates, and the tabs of every two adjacent bipolar plates are arranged in a staggered mode. According to the water electrolysis hydrogen production device disclosed by the utility model, the identification marks corresponding to the gas path opening and the water path opening are arranged on the upper end plate, so that mistake proofing is convenient to distinguish when a hydrogen path and a water path are assembled, and the tabs on the two adjacent bipolar plates are arranged in a staggered manner, so that the assembly mistake proofing of the bipolar plates and a membrane electrode assembly can be realized, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water electrolysis hydrogen production, in particular to a water electrolysis hydrogen production device and its auxiliary tooling. Background Art

[0002] At present, the energy crisis and environmental pollution are becoming increasingly severe. The development of renewable energy and sustainable development have become one of the research focuses of various countries. Among them, hydrogen energy is recognized as one of the most promising energy carriers in the future due to its clean and efficient characteristics.

[0003] Among the existing hydrogen production technologies, the use of electricity generated by the combustion of renewable energy as a power source for water electrolysis is the most mature and promising technology, and is regarded as the best way to the hydrogen economy. Water electrolysis is the process of decomposing water into hydrogen and oxygen. At present, the more mature method of water electrolysis for hydrogen production is alkaline water electrolysis. The technology of alkaline water electrolysis for hydrogen production is mature, with low investment and operating costs, but there are problems such as alkali loss, corrosion, and high energy consumption. The development of water electrolyzer hydrogen production equipment is a hot topic in alkaline water electrolysis hydrogen production research at home and abroad. PEM (polymer electrolyte membrane) electrolyzer uses pure water as the medium, and the PEM membrane plays a dual role as an electrolyte and a diaphragm. When the PEM electrolyzer is working, the hydrated protons on the membrane are transferred between the anode and the cathode through the interface area, and an acidic water electrolysis reaction occurs, which has the advantages of high hydrogen production efficiency and environmental protection.

[0004] In the prior art, the electrolytic cell assembly operation is difficult, the whole stack is easy to be assembled incorrectly, the assembly efficiency is low, the assembly cycle is long, and the assemblers are required to have high proficiency. There is also the problem of inconvenient transportation after assembly. Airtightness failure is prone to occur during transportation due to vibration. If airtightness failure occurs, the whole stack needs to be disassembled again, which consumes a lot of time and cost. In addition, during the electrolytic cell assembly process, simple manual measurements are performed before and after pressing the stack, with poor accuracy. Therefore, the calculated packaging force and deformation results are accidental, and the relationship between the whole stack pressing force and the sealing of the electrolytic cell cannot be determined. In addition, hydrogen leakage is prone to occur, which seriously affects the safe and stable operation of the electrolytic cell, and the hydrogen production pressure of the electrolytic cell cannot be effectively increased. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide a water electrolysis hydrogen production device and its auxiliary tooling to solve the problems of difficult assembly operation of existing PEM electrolyzers, easy assembly errors of the entire stack, low assembly efficiency and long assembly cycle.

[0006] The first aspect of the utility model provides a water electrolysis hydrogen production device, wherein the water electrolysis hydrogen production device comprises:

[0007] The end plate assembly comprises an upper end plate and a lower end plate arranged up and down, wherein the upper end plate is provided with an air passage opening and a water passage opening and indication marks corresponding to the air passage opening and the water passage opening respectively;

[0008] The bipolar plate and the membrane electrode assembly are sandwiched between the upper end plate and the lower end plate. The bipolar plate and the membrane electrode assembly include bipolar plates and membrane electrodes that are alternately arranged with each other. The side of the bipolar plate is formed with protruding pole ears, and the pole ears of two adjacent bipolar plates are arranged in an alternating manner.

[0009] Preferably, the water electrolysis hydrogen production device further comprises:

[0010] A support member, arranged at the bottom of the lower end plate;

[0011] The shock absorbing member is arranged at the bottom of the supporting member.

[0012] Preferably, the water electrolysis hydrogen production device further comprises:

[0013] A fastening assembly is connected to the end plate assembly, and connecting holes are provided on both the upper end plate and the lower end plate; the fastening assembly includes a pull rod, a locking piece and an elastic piece, the pull rod is passed through the connecting hole, the locking piece is arranged at the end of the pull rod in the length direction, and the elastic piece is arranged between the locking piece and the upper end plate.

[0014] Preferably, the water electrolysis hydrogen production device further comprises:

[0015] an insulating member disposed between the end plate assembly and the bipolar plate and membrane electrode assembly;

[0016] The current collecting member is arranged between the insulating member and the bipolar plate and the membrane electrode assembly.

[0017] Preferably, the water electrolysis hydrogen production device further comprises:

[0018] The connecting flange, the air passage and the water passage are both formed as tubular structures protruding from the surface of the upper end plate, and the connecting flange is sleeved on the outer side of the tubular structure.

[0019] Preferably, a lifting hole is provided on the end plate assembly.

[0020] The second aspect of the utility model provides an auxiliary tool, comprising a positioning member and a water electrolysis hydrogen production device as described in any of the above technical solutions, wherein the upper end plate and the side walls of the bipolar plate and the membrane electrode assembly are provided with positioning grooves;

[0021] A protruding positioning portion is formed on the side wall of the positioning member, the bottom of the positioning portion abuts against the top of the lower end plate, and the side of the positioning portion extends into the positioning groove.

[0022] Preferably, the auxiliary tooling further includes:

[0023] The measuring assembly comprises a scale arranged in the height direction of the positioning part and a probe slidably connected to the scale, and the probe can move with the stacking height of the water electrolysis hydrogen production device.

[0024] Preferably, the positioning grooves are arranged at the four corners of the upper end plate, the bipolar plate and the membrane electrode assembly, and the positioning members are arranged in one-to-one correspondence with the positioning grooves.

[0025] Preferably, the auxiliary tooling further includes:

[0026] The base is arranged at the bottom of the positioning member, and an assembly area is formed on the base.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] The water electrolysis hydrogen production device of the utility model is provided with identification marks corresponding to the gas passage and the water passage on the upper end plate, so that the hydrogen passage and the water passage can be distinguished and prevented from errors during assembly. The pole ears on the two adjacent bipolar plates are arranged in a staggered manner, so that errors in the assembly of the bipolar plates and the membrane electrode assemblies can be prevented, and the assembly efficiency can be accelerated. In addition, the positioning parts of the auxiliary tooling can realize the positioning of the assembly of the water electrolysis hydrogen production device, and the assembly efficiency is further improved on the basis of the structure of the water electrolysis hydrogen production device.

[0029] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of a water electrolysis hydrogen production device provided in an embodiment of the utility model;

[0032] Figure 2 A schematic diagram of the structure of the upper end plate in the water electrolysis hydrogen production device provided in an embodiment of the utility model;

[0033] Figure 3 A schematic diagram of the structure of the electrode ear in the water electrolysis hydrogen production device provided in an embodiment of the utility model;

[0034] Figure 4A schematic diagram of the structure of the auxiliary tooling provided in the embodiment of the utility model;

[0035] Figure 5 A schematic structural diagram of the assembly of auxiliary tooling and a water electrolysis hydrogen production device provided in an embodiment of the utility model.

[0036] Icons: 11-upper end plate; 111-gas outlet; 112-water outlet; 113-connecting hole; 114-indicator mark; 12-lower end plate; 21-gas outlet flange; 22-water outlet flange; 30-bipolar plate and membrane electrode assembly; 31-ear; 40-support member; 50-shock absorber; 61-pull rod; 62-locking member; 63-elastic member; 70-insulating member; 80-current collecting member; 90-positioning groove; 101-positioning member; 1011-positioning part; 1021-scale; 1022-probe; 103-base; 1031-assembly area. DETAILED DESCRIPTION

[0037] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0038] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0039] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0040] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0041] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0042] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0043] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0044] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0045] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0046] According to a first aspect of the utility model, a water electrolysis hydrogen production device is provided, comprising an end plate assembly, a bipolar plate and a membrane electrode assembly 30 .

[0047] In this embodiment, if Figure 1 As shown, the end plate assembly includes an upper end plate 11 and a lower end plate 12 spaced apart from each other, the upper end plate 11 and the lower end plate 12 are both formed into a plate-like structure, the two plate-like structures are arranged parallel to each other, the bipolar plate and the membrane electrode assembly 30 are sandwiched between the upper end plate 11 and the lower end plate 12, the bipolar plate and the membrane electrode assembly 30 include bipolar plates and membrane electrodes arranged alternately with each other, and the bipolar plates and the membrane electrodes are arranged parallel to the upper end plate 11 and the lower end plate 12. In this embodiment, a plurality of bipolar plates and membrane electrodes are provided.

[0048] In this embodiment, if Figure 1 and 2 As shown, the upper end plate 11 is provided with a gas path opening 111 and a water path opening 112 and an indicator mark 114 corresponding to the gas path opening 111 and the water path opening 112, respectively, for indicating the function of the opening to the assembler, so that the hydrogen path and the water path can be easily distinguished during assembly, thereby reducing the difficulty of operation; specifically, the indicator mark 114 can be Chinese or foreign text with chemical formulas, such as H2O IN, H2O OUT or H2, or a graphic, as long as it is easy for the assembler to identify, thereby improving the assembly efficiency and avoiding assembly errors. The indicator mark 114 can be set on the upper end plate 11 by laser marking or label attachment.

[0049] In this embodiment, if Figure 1 and Figure 3 As shown, a protruding pole ear 31 is formed on the side of the bipolar plate, and the pole ears 31 of two adjacent bipolar plates are arranged alternately, so that the pole ears 31 on the bipolar plates and the membrane electrode assembly 30 are formed in an asymmetric stacking manner, and the pole ears 31 on multiple bipolar plates can be stacked into a stepped structure, so that multiple pole ears 31 are formed in a staggered and regular arrangement on the sides of the bipolar plates and the membrane electrode assembly 30, thereby effectively realizing error prevention in the assembly of the bipolar plates and the membrane electrode assembly 30 and accelerating the assembly efficiency.

[0050] Furthermore, in this embodiment, if Figure 1As shown, the water electrolysis hydrogen production device also includes a support member 40 arranged at the bottom of the lower end plate 12 and a shock absorber 50 arranged at the bottom of the support member 40. The support member 40 can be formed into a columnar structure, and the cross section of the support member 40 can be formed into an L shape, so that the weight of the support member 40 itself is reduced and the support stability can be ensured. In this embodiment, the support member 40 is preferably provided in multiple and arranged at intervals along the circumference of the lower end plate 12 to improve the support stability. The shock absorber 50 is arranged in a one-to-one correspondence with the support member 40. The shock absorber 50 can adopt a flexible shock-absorbing pad, such as an O-type shock-absorbing pad. After the assembly of the water electrolysis hydrogen production device is completed, the support member 40 and the shock absorber 50 are used to support the subsequent transportation. The setting of the shock absorber 50 can reduce the problem of electrolytic cell sealing failure caused by vibration during transportation.

[0051] In this embodiment, if Figure 1 As shown, the bottom of the support member 40 is formed as a plate-like structure, and the shock absorbing member 50 is installed on the plate-like structure, wherein at least a portion of the shock absorbing member 50 is located below the plate-like structure.

[0052] In addition, in this embodiment, the end plate assembly is provided with a hoisting hole, which is convenient for lifting or moving the water electrolysis hydrogen production device by mechanical equipment (such as a crane) or manually during the assembly process, so as to facilitate transportation. Preferably, both the upper end plate 11 and the lower end plate 12 are provided with hoisting holes, so as to meet different hoisting requirements.

[0053] In this embodiment, if Figure 1 As shown, the water electrolysis hydrogen production device further includes an insulating member 70 and a current collector 80, both of which are formed into a plate-like structure, and two of each are provided, the insulating member 70 is provided between the end plate assembly and the bipolar plate and the membrane electrode assembly 30, and the current collector 80 is provided between the insulating member 70 and the bipolar plate and the membrane electrode assembly 30. Specifically, the two insulating members 70 are an upper insulating plate and a lower insulating plate, respectively, and the two current collectors 80 are an upper current collector and a lower current collector, respectively, the upper insulating plate is sandwiched between the upper current collector and the upper end plate 11, the lower insulating plate is sandwiched between the lower current collector and the lower end plate 12, and the bipolar plate and the membrane electrode assembly 30 are sandwiched between the upper current collector and the lower current collector.

[0054] In this embodiment, if Figure 1 As shown, positioning grooves 90 are provided on the sides of the upper end plate 11, the bipolar plate and the membrane electrode assembly 30, the insulating member 70 and the current collecting member 80. During the assembly of the water electrolysis hydrogen production device, the openings of the positioning grooves 90 on different components are oriented in the same direction, thereby ensuring assembly precision and accuracy and improving assembly efficiency.

[0055] In this embodiment, if Figure 1As shown, the gas path port 111 and the water path port 112 are formed into a tubular structure protruding from the surface of the upper end plate 11, and the water electrolysis hydrogen production device also includes an outer connecting flange sleeved on the tubular structure, which is used to connect the gas path port 111 and the water path port 112 to the external pipeline respectively, and has the advantages of good sealing and convenient connection. The connecting flange can be a pipeline flange. Specifically, the connecting flange includes a gas path flange 21 and a water path flange 22, the gas path flange 21 is sleeved on the outer side of the gas path port 111, and the water path flange 22 is sleeved on the outer side of the water path port 112.

[0056] In this embodiment, if Figure 1 As shown, the water electrolysis hydrogen production device also includes a fastening assembly connected to the end plate assembly, which is used to fix the upper end plate 11 and the lower end plate 12 together, so that the bipolar plate and membrane electrode assembly 30, the insulating member 70 and the current collecting member 80 as described above are all clamped between the upper end plate 11 and the lower end plate 12.

[0057] Specifically, a connecting hole 113 is provided on the upper end plate 11 and the lower end plate 12, and the fastening assembly includes a pull rod 61, a locking member 62 and an elastic member 63. The pull rod 61 passes through the connecting hole 113 on the upper end plate 11 and the connecting hole 113 on the lower end plate 12. The locking member 62 is arranged at the end of the pull rod 61 in the length direction and can slide along the length direction of the pull rod 61 to press the upper end plate 11 toward the lower end plate 12. The locking member 62 can be a nut structure, and an external thread matching the locking member 62 is provided on the outer wall of the pull rod 61. Two locking members 62 can be provided and are respectively located at the two ends of the pull rod 61 in the length direction. The elastic member 63 is arranged between the locking member 62 and the upper end plate 11 to prevent loosening. The elastic member 63 can be a disc spring.

[0058] In this embodiment, if Figure 1 As shown, multiple groups of fastening assemblies are provided, and the multiple groups of fastening assemblies are arranged at circumferential intervals around the end plate assembly to ensure that the electrolysis water hydrogen production device is subjected to uniform force in a locked state.

[0059] According to the water electrolysis hydrogen production device of the utility model, identification marks corresponding to the gas and water ports are provided on the upper end plate, so that the hydrogen and water paths can be easily distinguished during assembly, and the pole ears on the two adjacent bipolar plates are arranged in a staggered manner, which can realize assembly error prevention of the bipolar plates and the membrane electrode assembly and speed up assembly efficiency. The support member is arranged below the lower end plate and the shock absorber is arranged at the bottom of the support member, so that after the assembly of the water electrolysis hydrogen production device is completed, the support member and the shock absorber are used to support the subsequent transportation, and the setting of the shock absorber can reduce the problem of electrolytic cell sealing failure caused by vibration during transportation.

[0060] The second aspect of the utility model provides an auxiliary tool, including a positioning member 101 and the above water electrolysis hydrogen production device.

[0061] In this embodiment, as shown in 4 and Figure 5 As shown, the upper end plate 11, the bipolar plate and the side wall of the membrane electrode assembly 30 in the water electrolysis hydrogen production device are provided with positioning grooves 90; it should be noted that the insulating member 70 and the current collecting member 80 in the above-mentioned water electrolysis hydrogen production device are also provided with positioning grooves 90.

[0062] In this embodiment, if Figure 4 and Figure 5 As shown, the positioning member 101 is formed as a vertically arranged plate-like structure, and the side wall of the positioning member 101 is formed with a protruding positioning portion 1011. During the assembly of the water electrolysis hydrogen production device, the bottom of the positioning portion 1011 abuts against the top of the lower end plate 12, and the side of the positioning portion 1011 extends into the positioning groove 90, so that the water electrolysis hydrogen production device is positioned during the assembly process, thereby reducing the difficulty of assembly operation and improving assembly efficiency.

[0063] In a preferred embodiment, Figure 4 and Figure 5 As shown, positioning grooves 90 are arranged at the four corners of the upper end plate 11, the bipolar plate and the membrane electrode assembly 30, and the positioning members 101 are arranged one by one in correspondence with the positioning grooves 90, so that the circumferential positioning of the water electrolysis hydrogen production device is achieved, thereby further reducing the difficulty of assembly and improving the assembly reliability.

[0064] Furthermore, in this embodiment, the positioning portions 1011 of multiple positioning members 101 are arranged relative to each other, so that the auxiliary tooling forms a symmetrical structure, so that the distance between the positioning portions 1011 on different positioning members 101 can be adjusted to meet the needs of water electrolysis hydrogen production devices of different sizes, ensuring that the water electrolysis hydrogen production device can be assembled layer by layer from bottom to top.

[0065] Furthermore, in this embodiment, if Figure 4 and Figure 5 As shown, the positioning member 101 is also provided with a weight-reducing hole to reduce the weight of the positioning member 101 and prevent the positioning member 101 from being skewed. Preferably, a plurality of weight-reducing holes are provided, and the plurality of weight-reducing holes can be arranged in the vertical direction. In a preferred embodiment, at least part of the weight-reducing holes are provided in the positioning portion 1011 to reduce the weight of the positioning portion 1011, thereby ensuring the shape accuracy of the positioning portion 1011, so that the bottom of the positioning portion 1011 can be completely in contact with the lower end plate 12, ensuring the contact area and improving the positioning effect.

[0066] In this embodiment, if Figure 4 and Figure 5As shown, the auxiliary tooling also includes a measuring component. Specifically, the measuring component includes a scale 1021 arranged in the height direction of the positioning portion 1011 and a probe 1022 slidably connected to the scale 1021. The value on the scale 1021 gradually increases from low to high, and the probe 1022 can move with the stacking height of the water electrolysis hydrogen production device to meet the height requirements of the water electrolysis hydrogen production device under different pressing forces. In this way, the height change of the water electrolysis hydrogen production device can be read out at different stages and different packaging force conditions during the pressing process, and effective dynamic observation of the deformation amount can be achieved during the pressing process, which is convenient for sorting out the relationship between the pressing force, hydrogen production pressure and the sealing of the electrolyzer, so as to quickly grasp and summarize the rules and formulas, thereby shortening the production cycle and increasing the hydrogen production pressure.

[0067] Specifically, the measuring assembly is arranged in a one-to-one correspondence with the positioning member 101, so as to ensure the accuracy of the measurement result and facilitate reading of the value. More specifically, in this embodiment, the probe 1022 extends in the horizontal direction and can overlap with the top of the electrolytic water production device to achieve accurate measurement. In a preferred embodiment, the probe 1022 is flexible so that the probe 1022 can be deformed, so as not to interfere with the assembly of the electrolytic water hydrogen production device.

[0068] In this embodiment, if Figure 4 and Figure 5 As shown, the auxiliary tooling also includes a bottom base 103 arranged on the positioning member 101. The base 103 and the positioning member 101 can be connected by fasteners such as bolts or screws. The base 103 is formed as a flat plate structure. The base 103 can be a rectangular or circular plate structure. An assembly area 1031 is formed on the base 103 for assembling the water electrolysis hydrogen production device. The support member 40 in the water electrolysis hydrogen production device can be placed on the base 103. The assembly area 1031 is preferably located in the middle of the base 103. The positioning member 101 is arranged on the side of the assembly area 1031. When there are multiple positioning members, the multiple positioning members 101 are arranged at circumferential intervals around the assembly area 1031.

[0069] According to an auxiliary tooling provided by the second aspect of the utility model, the positioning piece can realize positioning for the assembly of the hydrogen production device by electrolysis of water, thereby reducing the difficulty of the assembly operation and further improving the assembly efficiency on the basis of the structure of the hydrogen production device by electrolysis of water; in addition, the measuring component can read the height change of the hydrogen production device by electrolysis of water at different stages and under different packaging force conditions during the press-fitting process, thereby realizing effective dynamic observation of the deformation during the press-fitting process, facilitating the sorting out of the relationship between the press-fitting force, the hydrogen production pressure and the sealing of the electrolytic cell, so as to quickly grasp and summarize the rules and formulas, thereby shortening the production cycle and improving the hydrogen production pressure.

[0070] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A hydrogen production device by electrolysis of water, characterized in that: The water electrolysis hydrogen production device comprises: The end plate assembly comprises an upper end plate and a lower end plate arranged up and down, wherein the upper end plate is provided with an air passage opening and a water passage opening and indication marks corresponding to the air passage opening and the water passage opening respectively; The bipolar plate and the membrane electrode assembly are sandwiched between the upper end plate and the lower end plate. The bipolar plate and the membrane electrode assembly include bipolar plates and membrane electrodes that are alternately arranged with each other. The side of the bipolar plate is formed with protruding pole ears, and the pole ears of two adjacent bipolar plates are arranged in an alternating manner.

2. The water electrolysis hydrogen production device according to claim 1, characterized in that: The water electrolysis hydrogen production device also includes: A support member, arranged at the bottom of the lower end plate; The shock absorbing member is arranged at the bottom of the supporting member.

3. The water electrolysis hydrogen production device according to claim 1, characterized in that: The water electrolysis hydrogen production device also includes: A fastening assembly is connected to the end plate assembly, and connecting holes are provided on both the upper end plate and the lower end plate; the fastening assembly includes a pull rod, a locking piece and an elastic piece, the pull rod is passed through the connecting hole, the locking piece is arranged at the end of the pull rod in the length direction, and the elastic piece is arranged between the locking piece and the upper end plate.

4. The water electrolysis hydrogen production device according to claim 1, characterized in that: The water electrolysis hydrogen production device also includes: an insulating member disposed between the end plate assembly and the bipolar plate and membrane electrode assembly; The current collecting member is arranged between the insulating member and the bipolar plate and the membrane electrode assembly.

5. The water electrolysis hydrogen production device according to claim 1, characterized in that: The water electrolysis hydrogen production device also includes: The connecting flange, the air passage and the water passage are both formed as tubular structures protruding from the surface of the upper end plate, and the connecting flange is sleeved on the outer side of the tubular structure.

6. The water electrolysis hydrogen production device according to claim 1, characterized in that: The end plate assembly is provided with a hoisting hole.

7. An auxiliary tooling, characterized in that: A device for producing hydrogen by electrolysis of water comprising a positioning member and any one of claims 1 to 6, wherein the upper end plate and the side walls of the bipolar plate and the membrane electrode assembly are provided with positioning grooves; A protruding positioning portion is formed on the side wall of the positioning member, the bottom of the positioning portion abuts against the top of the lower end plate, and the side of the positioning portion extends into the positioning groove.

8. The auxiliary tooling according to claim 7, characterized in that: The auxiliary tooling also includes: The measuring assembly comprises a scale arranged in the height direction of the positioning part and a probe slidably connected to the scale, and the probe can move with the stacking height of the water electrolysis hydrogen production device.

9. The auxiliary tooling according to claim 7, characterized in that: The positioning grooves are arranged at the four corners of the upper end plate, the bipolar plate and the membrane electrode assembly, and the positioning members are arranged in one-to-one correspondence with the positioning grooves.

10. The auxiliary tooling according to claim 7, characterized in that: The auxiliary tooling also includes: The base is arranged at the bottom of the positioning member, and an assembly area is formed on the base.

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