CN-122013211-A - Water electrolysis tank structure and manufacturing method thereof

Abstract

The application provides a water electrolytic tank structure and a manufacturing method of the water electrolytic tank structure, wherein the water electrolytic tank structure comprises a first flow field plate and a stretching net; the first flow field plate is provided with a first flow field structure, the first flow field structure comprises a first ridge and a first flow channel between the first ridge, the first ridge extends along a first direction, the stretching net is provided with net stems and regular holes surrounded by the net stems, the stretching net is in fit with the flow field plate, the net stems comprise second ridge parts arranged along the first direction, and the second ridge parts are connected with the first ridge parts in a welding mode. Like this, the second ridge of tensile net extends along same direction with the first ridge of first flow field board, is favorable to the regulation to aim at, and owing to tensile net and the laminating setting of flow field board, does benefit to the high-quality welding of realization second ridge and first ridge, has realized the high-efficient switching on between tensile net and the flow field board, has reduced the contact resistance to the degree of dependence of cladding material, promotes the economic nature of electrolytic water hydrogen plant.

Inventors

• WANG RENFANG
• FANG LIANG
• SHI WEIYU
• HOU ZHONGJUN
• NIE YUJIE
• DONG JIAN

Assignees

• 内蒙古捷氢科技有限公司

Dates

Publication Date

20260512

Application Date

20260311

Claims (17)

1. 1. A water electrolysis cell structure comprising: a first flow field plate having a first flow field structure including a first ridge and a first flow channel between the first ridge; the stretching net is provided with a net stem and regular holes surrounded by the net stem, the stretching net and the flow field plate are in fit arrangement, the net stem comprises second ridges arranged along the first direction, and the second ridges are connected with the first ridges in a welding mode.
2. 2. The water electrolyser structure of claim 1 wherein said regular holes are hexagonal holes and said second ridge is an opposite one of said net stalks.
3. 3. The water electrolyser structure of claim 2 wherein said regular holes are flat hexagonal holes and said second ridge is a long opposite side of said web.
4. 4. The water electrolyser structure of claim 2 wherein the direction of extension of said second ridge is perpendicular to said first direction, the midpoint of said second ridge being located at the centerline of said first ridge in said first direction.
5. 5. The water electrolyser structure of claim 4 wherein the ratio between the period of said first ridge and the period of said second ridge in a second direction is m/n, m and n being positive integers and ranging from [1,3], said second direction being perpendicular to said first direction and perpendicular to the stacking direction of said first flow field plates and said tensile web.
6. 6. The water electrolyser structure of claim 4, wherein the weld location of said first ridge is on a centerline of said first ridge in said first direction.
7. 7. The water electrolysis cell structure according to claim 1, further comprising: The porous layer is arranged on one side of the stretching net, which is away from the flow field plate, and is provided with a through hole, and one side of the porous layer, which is away from the stretching net, is used for arranging a membrane electrode.
8. 8. The water electrolysis cell structure according to any one of claims 1 to 6, further comprising: The second flow field plate is provided with a second flow field structure, the second flow field structure comprises a third ridge and a second flow channel between the third ridge, the first flow field plate and the second flow field plate are connected in a welding mode, and the first ridge and the third ridge are arranged opposite to each other.
9. 9. The water electrolysis cell arrangement according to any of claims 1 to 6, wherein the tensile web and the flow field plate surfaces have a coating with a thickness in the range of [0-100nm ].
10. 10. The water electrolysis cell arrangement according to any of claims 1 to 6, wherein the flow field plates are stamped plates having a thickness in the range of [0.05-1mm ].
11. 11. The water electrolysis cell structure according to any one of claims 1 to 6, wherein the stretched web has a thickness in the range of [0.1 to 1mm ].
12. 12. The water electrolysis cell structure according to any one of claims 1 to 7, further comprising: And a membrane electrode, a diffusion layer and a third flow field plate which are sequentially stacked on one side of the stretching net, which is away from the first flow field plate.
13. 13. The water electrolysis cell according to claim 12, wherein the first flow field plate is an anode plate and the third flow field plate is a cathode plate.
14. 14. A method of fabricating a water electrolysis cell structure, the method comprising: Positioning a first flow field plate and a stretching net, wherein the first flow field plate is provided with a first flow field structure, the first flow field structure comprises a first ridge part and a first flow channel between the first ridge parts, the first ridge part extends along a first direction, the stretching net is provided with net stems and regular holes surrounded by the net stems, the stretching net is in fit with the flow field plate, and the net stems comprise second ridge parts arranged along the first direction; the second ridge and the first ridge are welded together by welding.
15. 15. The method of claim 14, wherein the weld location of the first ridge is on a centerline of the first ridge in the first direction.
16. 16. The method of claim 14, wherein the method further comprises: Positioning the first flow field plate and the second flow field plate, the second flow field plate having a second flow field structure comprising a third ridge and a second flow channel between the third ridge; And welding the first flow field plate and the second flow field plate, wherein the first ridge and the third ridge are arranged opposite to each other.
17. 17. The method of claim 14, wherein the method further comprises: and forming a plating layer on the first flow field plate and the stretching net, wherein the thickness of the plating layer ranges from [ 0nm to 100nm ].

Description

Water electrolysis tank structure and manufacturing method thereof Technical Field The application relates to the field of water electrolytic baths, in particular to a water electrolytic bath structure and a manufacturing method thereof. Background The water electrolyzer is an electrochemical device which is supplied with electric energy to decompose water into hydrogen and oxygen. The cathode plate and the anode plate are applied with different voltages to form an electric field, and a cathode diffusion layer (Gas Diffusion Layer, GDL) and a membrane electrode assembly (Membrane Electrode Assembly are sequentially arranged between the cathode plate and the anode plate MEA) and an anode diffusion layer (Gas Diffusion Layer, GDL) which are the core reaction and mass transfer regions for electrolyzed water, and the layers are closely adhered. The electrolytic tank is filled with excessive deionized water or electrolyte, and the generated hydrogen or oxygen can be discharged out of the electrolytic tank along with the rest deionized water or electrolyte in a two-phase flow mode. The current water electrolysis cell has higher cost, and severely limits the economic improvement of the water electrolysis hydrogen production technology. Disclosure of Invention In view of the above, the application aims to provide a water electrolysis cell structure and a manufacturing method thereof, which reduce the dependency of contact resistance on a plating layer, realize the cost reduction of an electrolytic cell assembly and improve the economy of the electrolytic water hydrogen production technology. In a first aspect, the present application provides a water electrolysis cell arrangement comprising: a first flow field plate having a first flow field structure including a first ridge and a first flow channel between the first ridge; the stretching net is provided with a net stem and regular holes surrounded by the net stem, the stretching net and the flow field plate are in fit arrangement, the net stem comprises second ridges arranged along the first direction, and the second ridges are connected with the first ridges in a welding mode. In some possible implementations, the regular holes are hexagonal holes and the second ridge is an opposite side of the stems. In some possible implementations, the regular holes are flat hexagonal holes and the second ridge is a long-opposite-side of the stems. In some possible implementations, the extending direction of the second ridge is perpendicular to the first direction, and a midpoint of the second ridge is located at a center line of the first ridge along the first direction. In some possible implementations, the ratio between the period of the first ridge and the period of the second ridge in a second direction perpendicular to the first direction and perpendicular to the stacking direction of the first flow field plate and the tensile web is m/n, m and n being positive integers and ranging from [1,3 ]. In some possible implementations, the welding location of the first ridge is on a centerline of the first ridge along the first direction. In some possible implementations, the period of the first ridge is 2mm, the width of the first ridge in the second direction is 1mm, the period of the second ridge in the first direction is 2mm, and the period in the second direction is 1mm. In some possible implementations, the structure further includes: The porous layer is arranged on one side of the stretching net, which is away from the flow field plate, and is provided with a through hole, and one side of the porous layer, which is away from the stretching net, is used for arranging a membrane electrode. In some possible implementations, the structure further includes: The second flow field plate is provided with a second flow field structure, the second flow field structure comprises a third ridge and a second flow channel between the third ridge, the first flow field plate and the second flow field plate are connected in a welding mode, and the first ridge and the third ridge are arranged opposite to each other. In some possible implementations, the tensile web and the flow field plate surfaces have a plating layer with a thickness in the range of [0-100nm ]. In some possible implementations, the flow field plate is a stamped plate having a thickness in the range of [0.05-1mm ]. In some possible implementations, the stretched web has a thickness in the range of [0.1-1mm ]. In some possible implementations, the structure further includes: And a membrane electrode, a diffusion layer and a third flow field plate which are sequentially stacked on one side of the stretching net, which is away from the first flow field plate. In some possible implementations, the first flow field plate is an anode plate and the third flow field plate is a cathode plate. In a second aspect, an embodiment of the present application provides a method for manufacturing a water electrolysis cell structure, the met