TWI779936B - Water electrolysis unit - Google Patents

Abstract

The invention discloses a water electrolysis unit. The water electrolysis unit includes two electrode plates, two titanium mesh structures, a membrane electrode assembly, two catalyst layers and two sealing rings. Each titanium mesh structure is fixed to one side of each electrode plate by diffusion welding technology. The membrane electrode assembly is located between the two titanium mesh structures. Each catalyst layer is arranged on one side of the titanium mesh structure. Each sealing ring is arranged between each electrode plate and the membrane electrode assembly, and each sealing ring is also arranged around the titanium mesh structure. The water electrolysis unit of the present invention uses the titanium mesh structure as the gas diffusion layer, so that the service life of the water electrolysis unit can be improved.

Description

Water electrolysis device

The invention relates to a water electrolysis device, in particular to a water electrolysis device without carbon cloth.

The existing common water electrolysis device generally includes two carbon cloths (gas diffusion layer), two electrode plates, a membrane electrode group and a fixing mechanism. There is a catalyst on one side of the carbon cloth, and the membrane electrode group is located between two Between the carbon cloths, each carbon cloth is located between the membrane electrode group and one of the electrode plates, and the fixing mechanism is used to make the two carbon cloths, the two electrode plates and the membrane electrode group lean against each other.

In this kind of water electrolysis device, since each carbon cloth, electrode plate and membrane electrode group are only against each other, after a long time of use of the water electrolysis device, the carbon cloth is prone to corrosion problems, which will lead to The contact resistance between the carbon cloth and the electrode plate increases, thereby reducing the operating efficiency of the water electrolysis device. In contrast, the related gas production equipment that utilizes this water electrolysis device to generate hydrogen or oxygen also has the problem that the gas production efficiency will decrease after a long time of operation.

The invention discloses a water electrolysis device, which is mainly used to improve the problem that the conventional water electrolysis device is prone to drop in operating efficiency after long-term use, and the related gas production equipment that utilizes the water electrolysis device to generate hydrogen or oxygen, After a long time of use, the problem of gas output efficiency is prone to decrease.

One embodiment of the present invention discloses a water electrolysis device, which includes: two electrode plates, at least two titanium mesh structures, two catalyst layers, a membrane electrode group and two sealing rings. One side of each electrode plate has a plurality of flow channels, one of the electrode plates has an input channel and a hydrogen output channel, The other electrode plate has an oxygen output channel. One of the titanium mesh structures is fixed on one side of one electrode plate with multiple flow channels by diffusion welding technology, and the other titanium mesh structure is fixed on the side of the other electrode plate with multiple flow channels by diffusion welding technology; The mesh structure includes a plurality of titanium wires, and the segments of different positions of each titanium wire overlap with different titanium wires respectively, and each titanium mesh structure includes a plurality of mesh holes; the multiple different positions of each titanium wire The section of the position is welded with the electrode plate, and the position where each electrode plate is welded with the titanium wire can establish a conductive path through at least one titanium wire, and the section where each titanium wire is not welded with the electrode plate is Correspondingly stacked on one side of another titanium wire. Each catalyst layer is arranged on at least a part of each titanium mesh structure and one side of each electrode plate on which the titanium mesh structure is arranged. The membrane electrode group is arranged between two titanium mesh structures. There are at least two sealing rings, one sealing ring is arranged between each electrode plate and the membrane electrode group, and the periphery of each titanium mesh structure is surrounded by the sealing ring. At least two auxiliary titanium mesh structures, one of which is fixed on the side of one titanium mesh structure opposite to the electrode plate by diffusion welding technology, and the other auxiliary titanium mesh structure is fixed on the other titanium mesh structure by diffusion welding technology Opposite to the side of the electrode plate; each auxiliary titanium mesh structure includes a plurality of auxiliary titanium wires, and a plurality of sections in different positions of each auxiliary titanium wire are respectively arranged to overlap with different auxiliary titanium wires, and each auxiliary titanium mesh structure Contains a plurality of meshes, and the maximum aperture of the meshes contained in each titanium mesh structure is larger than the maximum aperture of the meshes contained in each auxiliary titanium mesh structure; the sections of multiple different positions of each auxiliary titanium wire are the same as titanium One section of the plurality of titanium wires included in the mesh structure is welded; the position where each electrode plate is connected to the titanium wire can establish a conductive path through at least one titanium wire and multiple auxiliary titanium wires.

In summary, in the water electrolysis device of the present invention, the titanium mesh structure is fixed to the electrode plate by diffusion welding technology, and the catalyst layer is formed on the surface of the titanium mesh structure and the surface of the electrode plate And other design, can make the water electrolysis device after long-term use, each titanium mesh structure The position where the titanium wire is connected to the electrode plate can still maintain the effect of electrical conduction, thereby maintaining the operating efficiency of the water electrolysis device.

In order to further understand the characteristics and technical content of the present invention, please refer to the following detailed description and drawings related to the present invention, but these descriptions and drawings are only used to illustrate the present invention, rather than to make any statement on the scope of protection of the present invention. limit.

1: Water electrolysis device

11: electrode plate

111: input channel

112: Hydrogen output channel

113: Oxygen output channel

114: side

115: Convex structure

12: Titanium mesh structure

121: titanium wire

122: mesh

13: Membrane electrode group

14: sealing ring

15: Catalyst layer

2: Water electrolysis device

21: electrode plate

211: input channel

212: Hydrogen output channel

213: Oxygen output channel

214: side

22: Titanium mesh structure

221: titanium wire

222: mesh

23: Membrane electrode group

24: sealing ring

25: Catalyst layer

26: Auxiliary titanium mesh structure

261: Auxiliary titanium wire

262: mesh

3: Water electrolysis device

31: electrode plate

311: input channel

312: Hydrogen output channel

313:Oxygen output channel

314: side

315: Convex structure

32: Titanium mesh structure

321: titanium wire

322: mesh

33: Membrane electrode group

34: sealing ring

36: Auxiliary titanium mesh structure

361: Auxiliary titanium wire

362: mesh

C: Runner

Fig. 1 is a schematic diagram of the first embodiment of the water electrolysis device of the present invention.

Fig. 2 is an exploded schematic view of the first embodiment of the water electrolysis device of the present invention.

3 is a partially enlarged schematic view of the electrode plate and titanium mesh structure of the first embodiment of the water electrolysis device of the present invention.

FIG. 4 is a schematic cross-sectional view along line IV-IV of FIG. 1 .

FIG. 5 is a partially enlarged schematic diagram of FIG. 4 .

Fig. 6 is an exploded schematic view of the second embodiment of the water electrolysis device of the present invention.

7 is a partially enlarged schematic view of the titanium mesh structure and the auxiliary titanium mesh structure of the second embodiment of the water electrolysis device of the present invention.

FIG. 8 is a schematic cross-sectional view of the second embodiment of the water electrolysis device of the present invention.

FIG. 9 is a partially enlarged schematic diagram of FIG. 8 .

Fig. 10 is an exploded schematic view of the third embodiment of the water electrolysis device of the present invention.

In the following description, if it is pointed out that please refer to the specific drawing or as shown in the specific drawing, it is only used to emphasize in the subsequent description, most of the relevant content mentioned appears in the specific drawing, It is not intended, however, to limit the ensuing description to only those particular drawings referred to. The sizes and proportional relationships of the various structures presented in the various drawings of this embodiment are only for the convenience of description. The dimensions and proportions shown in the drawings do not represent the dimensions and proportions of actual applications.

Please refer to FIG. 1 to FIG. 5 , which are respectively a schematic diagram, an exploded schematic diagram, an enlarged schematic diagram of a partial component, a schematic cross-sectional diagram and an enlarged schematic diagram of a partial cross-section of the first embodiment of the water electrolysis device of the present invention. The water electrolysis device 1 of this embodiment includes two electrode plates 11 , two titanium mesh structures 12 , a membrane electrode assembly (Membrane Electrode Assembly, MEA) 13 , two sealing rings 14 and two catalyst layers 15 .

One of the electrode plates 11 has an input channel 111 and a hydrogen output channel 112 , and the other electrode plate 11 has an oxygen output channel 113 . The input channel 111 , the hydrogen output channel 112 and the oxygen output channel 113 are respectively disposed through the electrode plate 11 .

Each electrode plate 11 has a plurality of flow channels C on one side. For example, one side 114 of each electrode plate 11 may have a plurality of protrusion structures 115, and the plurality of protrusion structures 115 jointly form a plurality of flow channels C on one side of the electrode plate 11. , and the plurality of flow channels C are interconnected. Regarding the formation of the multiple flow channels C on one side of each electrode plate 11, it is not limited to the above description, and the multiple flow channels C on one side of each electrode plate 11 are not limited to must be completely connected to each other . In different embodiments, the plurality of flow channels C on one side of each electrode plate 11 may also be formed by concaves on one side of the electrode plate 11 .

One of the titanium mesh structures 12 is fixed on one side of one of the electrode plates 11 with a plurality of flow channels C by using diffusion bonding technology (Diffusion Bonding Technology), and the other titanium mesh structure 12 is fixed on the other electrode plate 11 by using diffusion bonding technology. One side of multiple runners C.

Each titanium mesh structure 12 includes a plurality of titanium wires 121, and a plurality of segments at different positions of each titanium wire 121 are arranged to overlap with different titanium wires 121, and each titanium mesh structure 12 includes a plurality of mesh holes 122, In simple terms, each titanium mesh structure 12 is composed of a plurality of titanium wires 121 interwoven with each other. Three-dimensional woven mesh structure. In practical applications, the diameter of each mesh 122 may be between 0.05 mm and 0.5 mm.

A plurality of sections of different positions of each titanium wire 121 are welded to the electrode plate 11, and the position where each electrode plate 11 is welded to the titanium wire 121 can establish a conductive path through at least one titanium wire 121, and each titanium wire 121 The section of the wire 121 that is not welded to the electrode plate 11 is stacked on one side of another titanium wire 121 . It should be noted that the overlapping and interweaving methods of the multiple titanium wires 121 contained in each titanium mesh structure 12 shown in the figure of this embodiment is only one of the exemplary forms. In practical applications, each titanium mesh structure The weaving method of the plurality of titanium wires 121 included in 12 can be changed according to requirements.

In one of the preferred embodiments, the material of each electrode plate 11 can be titanium, and each electrode plate 1 can be a titanium alloy plate or a pure titanium plate, so that each titanium wire 121 and the electrode can be strengthened. The connection strength of the welding position of the plate 11 is improved, so that the welding position of each titanium wire 121 and the electrode plate 11 is not easy to break and other problems. In different embodiments, the material of each electrode plate 11 may also be stainless steel.

As shown in FIG. 3 , it is a partial enlarged schematic view of the titanium mesh structure 12 being welded and fixed on the side of the electrode plate 11 with the flow channel C by diffusion welding technology. In Fig. 3, it is an example that some sections of each titanium wire 121 contained in the titanium mesh structure 12 are welded with a plurality of protrusion structures 115. 11, a plurality of protrusion structures 115 are welded together. In another embodiment where the side surface 114 of the electrode plate 11 is provided with a plurality of protrusion structures 115 , some sections of each titanium wire 121 of the titanium mesh structure 12 may also be welded to the side surface 114 of the electrode plate 11 .

As shown in FIG. 5 , each catalyst layer 15 is disposed on at least a part of each titanium mesh structure 12 and the side surface 114 of each electrode plate 11 on which the titanium mesh structure 12 is disposed. Specifically, in the actual production process, the relevant personnel or equipment can first use diffusion welding technology to fix the titanium mesh structure 12 on the side of the electrode plate 11 with the flow channel C, and then weld and fix the titanium mesh structure 12 on the side of the electrode plate 11. Titanium mesh structure 12 and electricity On one side of the pole plate 11, a catalyst layer 15 is formed by electroplating. In practical applications, the catalyst layer 15 may be made of materials such as platinum, gold, or iridium oxide, which is not limited here.

In different embodiments, the catalyst layer 15 may be coated on the surface of each titanium mesh structure 12, and then the titanium mesh structure 12 coated with the catalyst layer 15 is welded to the electrode plate 11 by diffusion welding technology. side of Road C.

As shown in FIGS. 2 to 5 , the membrane electrode group 13 is disposed between two titanium mesh structures 12 . A sealing ring 14 is arranged between each electrode plate 11 and the membrane electrode group 13, and the periphery of each titanium mesh structure 12 is surrounded by the sealing ring 14, and the sealing ring 14 is mainly used to restrict the flow of reaction liquid, hydrogen and oxygen scope. In one of the specific embodiments, two supporting frames may also be provided on both sides of each of the membrane electrode groups 13 , and each supporting frame and the adjacent electrode plate 11 hold a sealing ring 14 together.

According to the above, the water electrolysis device 1 of the present invention utilizes the titanium mesh structure 12 to replace the carbon cloth (gas diffusion layer) in the known water electrolysis device, and utilizes diffusion welding technology to weld the titanium mesh structure 12 to the electrode plate 11 On one side, since the partial sections of the multiple titanium wires 121 included in the titanium mesh structure 12 are welded to each other with the electrode plates 11, therefore, the water electrolysis device 1 of the present invention will lose the titanium mesh after a long time of use. The contact resistance between the structure 12 and the electrode plate 11 can still be maintained in a relatively good state.

On the other hand, in the known water electrolysis device, because there is only physical contact between the carbon cloth and the electrode plate 11 (the two only lean against each other), after a long time of use, the water electrolysis device is prone to burns in some areas of the carbon cloth. Corrosion causes this area to be unable to conduct electricity, which leads to an increase in the contact resistance between the carbon cloth and the electrode plate 11, thereby affecting the overall operating efficiency of the water electrolysis device.

In other words, after the water electrolysis device 1 of the present invention is used for a long time, each electrode plate 11 and the multiple titanium wires 121 included in the adjacent titanium mesh structure 12 jointly establish multiple conductive paths, which will Most of them will be in a state that can still be turned on normally. On the other hand, in the conventional water electrolysis device, after a long time of use, the eroded area of the carbon cloth will lead to the failure of part of the conductive path.

In addition, it is worth mentioning that in most conventional water electrolysis devices, one side of the carbon cloth is coated with a catalyst. Therefore, the overall manufacturing cost of the carbon cloth is relatively expensive. In contrast, the manufacturing cost of the titanium mesh structure 12 and the catalyst layer 15 included in the water electrolysis device 1 of the present invention is relatively cheap, and the water electrolysis device 1 of the present invention also has a relatively low manufacturing cost compared to conventional water electrolysis devices. Cheap advantage.

Please refer to FIG. 6 to FIG. 9 , which respectively show an exploded view of the second embodiment of the water electrolysis device of the present invention, a schematic view of the titanium mesh structure and an auxiliary titanium mesh structure, a schematic cross-sectional view and an enlarged partial cross-sectional view. The water electrolysis device 2 of this embodiment includes: two electrode plates 21 , two titanium mesh structures 22 , a membrane electrode group 23 , two sealing rings 24 , two catalyst layers 25 and two auxiliary titanium mesh structures 26 . One of the electrode plates 21 has an input channel 211 and a hydrogen output channel 212 , and the other electrode plate 21 has an oxygen output channel 213 . The input channel 211 , the hydrogen output channel 212 and the oxygen output channel 213 are respectively disposed through the electrode plate 21 .

The titanium mesh structure 22, the membrane electrode group 23, and the two sealing rings 24 described in this embodiment are substantially the same as the titanium mesh structure 12, the membrane electrode group 13, and the two sealing rings 14 of the aforementioned first embodiment. Let me repeat. The difference between the electrode plate 21 of this embodiment and the electrode plate 11 described in the aforementioned first embodiment is that: the side 214 where the electrode plate 21 and the titanium mesh structure 22 are welded to each other is planar, and the electrode plate 21 and the titanium mesh structure 22 are mutually welded. After welding, the sections of the titanium wires 221 of the titanium mesh structure 22 that are not welded to the electrode plate 21 will form a plurality of flow channels C together with the side surface 214 of the electrode plate 21 .

One of the auxiliary titanium mesh structures 26 is fixed on the side of one of the titanium mesh structures 22 opposite to the electrode plate 21 by diffusion welding technology, and the other auxiliary titanium mesh structure 26 is fixed on the other titanium mesh structure 22 opposite to the electrode by diffusion welding technology side of the board 21. In the actual manufacturing process, the titanium mesh structure 22 can be arranged on the side 214 of the electrode plate 21 first, and then the auxiliary titanium mesh structure 26 can be arranged On the side of the titanium mesh structure 22 opposite to the electrode plate 21 , finally, the electrode plate 21 , the titanium mesh structure 22 and the auxiliary titanium mesh structure 26 are welded to each other at one time by related diffusion welding equipment.

As shown in FIG. 6, FIG. 7 and FIG. 9, each auxiliary titanium mesh structure 26 includes a plurality of auxiliary titanium wires 261, and sections of multiple different positions of each auxiliary titanium wire 261 overlap with different auxiliary titanium wires 261 respectively. In such a way, each auxiliary titanium mesh structure 26 includes a plurality of mesh holes 262 , and the maximum pore diameter of the mesh holes 222 included in each titanium mesh structure 22 is larger than the maximum pore diameter of the mesh holes 262 included in each auxiliary titanium mesh structure 26 . Segments at different positions of each auxiliary titanium wire 261 are welded to one segment of the plurality of titanium wires 221 included in the titanium mesh structure 22 . The position where each electrode plate 21 is connected to the titanium wire 221 can establish a conductive path through at least one titanium wire 221 and a plurality of auxiliary titanium wires 261 .

In practical applications, the catalyst layer 25 can be formed on one side of the electrode plate 21, the titanium mesh structure 22 and the auxiliary titanium mesh structure 26 that have been fixed to each other by diffusion welding technology by means of electroplating, etc., and the catalyst layer 25 is corresponding to at least a part of the auxiliary titanium mesh structure 26 .

In one specific implementation, the maximum aperture of each mesh 222 of each titanium mesh structure 22 may be 2 to 20 times the maximum aperture of each mesh 262 of each auxiliary titanium mesh structure 26 . In one of the specific embodiments, the aperture of each mesh 222 of each titanium mesh structure 22 can be between 0.1 ~ 1.0 mm, and the aperture of each mesh 262 of each auxiliary titanium mesh structure 26 is then between 0.05 ~ 0.5 mm. mm.

In one of the specific implementations, the overall size of each titanium mesh structure 22 and the overall size of each auxiliary titanium mesh structure 26 are the same (that is, the overall width and length of the titanium mesh structure 22 are the same as the overall width and length of the auxiliary titanium mesh structure 26 ), and the mesh number of each titanium mesh structure 22 is between 50~500 mesh, and the mesh number of each auxiliary titanium mesh structure 26 is between 80~5000 mesh. In one of the embodiments, the overall size of each titanium mesh structure 22 and the overall size of each auxiliary titanium mesh structure 26 are the same (that is, the overall width and length of the titanium mesh structure 22 are the same as the overall width and length of the auxiliary titanium mesh structure 26 ),and The number of meshes included in each titanium mesh structure 22 is 1.6-100 times the number of meshes included in each auxiliary titanium mesh structure 26 .

According to the above, in simple terms, the main difference between this embodiment and the aforementioned first embodiment is that the multiple flow channels C on one side of the electrode plate 21 are not formed by the structure of the electrode plate 21 itself, but The electrode plate 21 is formed together with the titanium mesh structure 22, and an auxiliary titanium mesh structure 26 is also arranged between each titanium mesh structure 22 and the membrane electrode group 23, and each auxiliary titanium mesh structure 26 is mainly used as a gas diffusion layer (of course , the titanium mesh structure 22 can also have the function of gas diffusion).

Please refer to FIG. 10 , which is an exploded schematic diagram of a third embodiment of the water electrolysis device of the present invention. The water electrolysis device 3 of this embodiment includes two electrode plates 31, two titanium mesh structures 32, a membrane electrode group 33, two sealing rings 34, two catalyst layers (not shown) and two auxiliary titanium Net structure36. One of the electrode plates 31 has an input channel 311 and a hydrogen output channel 312 , and the other electrode plate 31 has an oxygen output channel 313 . The input channel 311 , the hydrogen output channel 312 and the oxygen output channel 313 are respectively disposed through the electrode plate 31 . A side surface 314 of one of the electrode plates 31 has a plurality of protrusion structures 315 , and the plurality of protrusion structures 315 and the side surface 314 together form a plurality of flow channels C communicating with each other.

Each titanium mesh structure 32 is formed by interweaving a plurality of titanium wires 321 , and each auxiliary titanium mesh structure 36 is formed by interweaving a plurality of auxiliary titanium wires 361 . One of the titanium mesh structures 32, one of the auxiliary titanium mesh structures 36 and one of the electrode plates 31 are mutually welded and fixed by diffusion welding technology, and the other titanium mesh structure 32, the other auxiliary titanium mesh structure 36 and the other electrode plate 31 are the same It is mutually welded and fixed by diffusion welding technology. At least a part of the mutually welded auxiliary titanium mesh structure 36 , titanium mesh structure 32 and electrode plate 31 is provided with a catalyst layer.

The membrane electrode assembly 33 and the sealing ring 34 in this embodiment are substantially the same as the membrane electrode assembly 13 and the sealing ring 14 in the first embodiment, please refer to the description of the first embodiment above, and will not repeat them here. The electrode plate 31, titanium mesh structure 32, auxiliary titanium mesh structure 36 and catalyst described in this embodiment The layers are substantially the same as the electrode plate 21 , the titanium mesh structure 22 , the auxiliary titanium mesh structure 26 and the catalyst layer described in the aforementioned second embodiment, please refer to the description of the aforementioned second embodiment, and will not repeat them here.

In one specific implementation, the maximum aperture of each mesh 322 of each titanium mesh structure 32 may be 2 to 20 times the maximum aperture of each mesh 362 of each auxiliary titanium mesh structure 36 . In one of the embodiments, the aperture of each mesh 322 of each titanium mesh structure 32 can be between 0.1-1.0 mm, and the aperture of each mesh 362 of each auxiliary titanium mesh structure 36 can be between 0.05-0.5 mm. mm.

In one of the specific implementations, the overall size of each titanium mesh structure 32 and the overall size of each auxiliary titanium mesh structure 36 are the same (that is, the overall width and length of the titanium mesh structure 32 are the same as the overall width and length of the auxiliary titanium mesh structure 36 ), and the mesh number of each titanium mesh structure 32 is between 50~500 mesh, and the mesh number of each auxiliary titanium mesh structure 36 is between 80~5000 mesh.

It should be noted that in the drawings of this embodiment, the water electrolysis device 3 includes two auxiliary titanium mesh structures 36 as an example, but the number of auxiliary titanium mesh structures 36 included in the water electrolysis device 3 does not exceed two limit. In the embodiment in which two or more auxiliary titanium mesh structures 36 are arranged between the membrane electrode group 33 and the titanium mesh structure 32, the closer the meshes 362 of the auxiliary titanium mesh structure 36 to the membrane electrode group 33 are, the smaller the diameter is. small.

In summary, the water electrolysis device of the present invention uses the titanium mesh structure as the gas diffusion layer, and makes the titanium mesh structure and the electrode plate utilize diffusion welding technology to weld each other, etc., so that the water electrolysis device can be used for a long time, and the titanium The contact impedance between the mesh structure and the electrode plate will not be greatly improved, thereby enabling the water electrolysis device to maintain a relatively good operating efficiency, and the overall service life of the water electrolysis device of the present invention will be longer than that of the conventional use of carbon Service life of water electrolysis device with cloth as gas diffusion layer.

The above descriptions are only preferred feasible embodiments of the present invention, and do not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the scope of protection of the present invention. .

1: Water electrolysis device

11: electrode plate

111: input channel

112: Hydrogen output channel

113: Oxygen output channel

114: side

115: Convex structure

12: Titanium mesh structure

121: titanium wire

122: mesh

13: Membrane electrode group

14: sealing ring

Claims (12)

A water electrolysis device comprising: two electrode plates, one side of each electrode plate has a plurality of flow channels, one of the electrode plates has an input channel and a hydrogen output channel, and the other electrode plate has a Oxygen output channel; at least two titanium mesh structures, wherein one of the titanium mesh structures is fixed on one side of one of the electrode plates with a plurality of the flow channels by diffusion welding technology, and the other titanium mesh structure is fixed by diffusion welding Technology is fixed on the other side of the electrode plate with a plurality of flow channels; each of the titanium mesh structures includes a plurality of titanium wires, and a plurality of segments in different positions of each of the titanium wires are respectively connected to different The titanium wires are arranged overlappingly, and each of the titanium mesh structures includes a plurality of mesh holes; sections of each of the titanium wires in different positions are welded to the electrode plate, and each of the electrodes The position where the plate is welded to the titanium wire can establish a conductive path through at least one of the titanium wires, and the section of each titanium wire that is not welded to the electrode plate is correspondingly stacked on another One side of the titanium wire; two catalyst layers, each of the catalyst layers is arranged on at least a part of each of the titanium mesh structures and each of the electrode plates is arranged on the side of the titanium mesh structure; a membrane electrode group , which is arranged between the two titanium mesh structures; two sealing rings, one sealing ring is arranged between each of the electrode plates and the membrane electrode group, and the periphery of each of the titanium mesh structures is It is surrounded by the sealing ring; at least two auxiliary titanium mesh structures, wherein one of the auxiliary titanium mesh structures is fixed on the side of one of the titanium mesh structures opposite to the electrode plate by diffusion welding technology, and the other is The auxiliary titanium mesh structure is fixed on the other side of the titanium mesh structure opposite to the electrode plate by means of diffusion welding technology. Side; each of the auxiliary titanium mesh structures includes a plurality of auxiliary titanium wires, and a plurality of segments at different positions of each of the auxiliary titanium wires are arranged to overlap with different auxiliary titanium wires, and each of the auxiliary titanium wires The mesh structure includes a plurality of mesh holes, and the maximum aperture of the mesh holes included in each of the titanium mesh structures is larger than the maximum aperture of the mesh holes included in each of the auxiliary titanium mesh structures; each of the auxiliary titanium mesh structures A plurality of segments at different positions of the wire are welded to one of the segments of the plurality of titanium wires contained in the titanium mesh structure; the position where each electrode plate is connected to the titanium wire can be passed At least one of the titanium wires and the plurality of auxiliary titanium wires jointly establish a conductive path. The water electrolysis device according to claim 1, wherein the diameter of each of the meshes is between 0.05 mm and 0.5 mm. The water electrolysis device according to claim 1, wherein the material of each of the electrode plates includes titanium or stainless steel; the material of the catalyst layer includes platinum, gold or iridium oxide. The water electrolysis device according to claim 1, wherein the side of each of the electrode plates provided with the titanium mesh structure is planar; each of the titanium wires of each of the titanium mesh structures is not connected to the electrode The sections where the plates are welded together with the electrode plates form a plurality of the flow channels. The water electrolysis device according to claim 4, wherein the catalyst layer is also provided on at least a part of the auxiliary titanium mesh structure. The water electrolysis device according to claim 4, wherein the maximum aperture of each mesh of each titanium mesh structure is 2 to 20 times the maximum aperture of each mesh of each auxiliary titanium mesh structure. The water electrolysis device as described in claim 4, wherein the apertures of each of the meshes of each of the titanium mesh structures are between 0.1 and 1.0 mm, and each of the auxiliary The aperture of the mesh of the titanium mesh structure is between 0.05mm and 0.5mm. The water electrolysis device according to claim 4, wherein the overall size of each of the titanium mesh structures and the overall size of each of the auxiliary titanium mesh structures are the same, and the mesh size of each of the titanium mesh structures included The number is 1.6 to 100 times the number of meshes contained in each of the auxiliary titanium mesh structures. The water electrolysis device according to claim 1, wherein the catalyst layer is also provided on at least a part of the auxiliary titanium mesh structure. The water electrolysis device according to claim 1, wherein the maximum aperture of each mesh of each titanium mesh structure is 2 to 20 times the maximum aperture of each mesh of each auxiliary titanium mesh structure. The water electrolysis device as claimed in claim 1, wherein the apertures of the meshes of each of the titanium mesh structures are between 0.1 and 1.0 mm, and the apertures of the meshes of each of the auxiliary titanium mesh structures are between At 0.05~0.5mm. The water electrolysis device according to claim 1, wherein the overall size of each of the titanium mesh structures and the overall size of each of the auxiliary titanium mesh structures are the same, and the mesh size of the meshes included in each of the titanium mesh structures The number is 1.6 to 100 times the number of meshes contained in each of the auxiliary titanium mesh structures.

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