CN-224212783-U - Anion exchange membrane banding structure

Abstract

The utility model provides an anion exchange membrane edge sealing structure which comprises an anion membrane and a frame membrane, wherein the frame membrane comprises an anode frame membrane and a cathode frame membrane, the anode frame membrane and the cathode frame membrane are correspondingly arranged, and the anion membrane is positioned between the anode frame membrane and the cathode frame membrane. The anion exchange membrane edge sealing structure has the beneficial effects that the frame membrane and the anion exchange membrane are pressed by a high-temperature hot pressing process, so that the hot melt adhesive layer is melted at high temperature and tightly adhered to the surface of the anion membrane to form an integrated sealing structure, and the tightness between the anion membrane and the frame membrane is ensured. The anion membrane is fixed through the frame membrane, so that the anion membrane is prevented from being displaced or deformed in the use process, meanwhile, the risk of edge breakage and hemming of the anion membrane is reduced, and the reliability and long-term stability of the system are improved. And sealing structures are further arranged on two sides of the frame film respectively so as to further enhance the sealing effect.

Inventors

• WANG TAO
• Xing Peinong
• ZHANG BAOCHUN
• LIU QIAN

Assignees

• 深圳稳石氢能科技有限公司

Dates

Publication Date

20260508

Application Date

20250522

Claims (9)

1. 1. The anion exchange membrane edge sealing structure is characterized by comprising an anion membrane and a frame membrane, wherein the frame membrane is arranged on two sides of the anion membrane and is fixedly connected with the anion membrane respectively; the frame membrane comprises an anode frame membrane and a cathode frame membrane, the anode frame membrane and the cathode frame membrane are correspondingly arranged, and the anion membrane is positioned between the anode frame membrane and the cathode frame membrane; The frame film is provided with a hot melt adhesive layer which is arranged opposite to the anion film; the frame film and the hot melt adhesive layer are formed by high-temperature hot pressing lamination; And sealing structures are respectively arranged on two sides of the frame film and are pressed and fastened on the frame film to form a seal.
2. 2. The anion exchange membrane edge sealing structure according to claim 1, wherein a glue surface is arranged on the hot melt adhesive layer, the glue surface is arranged corresponding to the frame membrane, and the glue surface is not leaked outside the hot melt adhesive layer.
3. 3. The anion exchange membrane edge sealing structure according to claim 2, wherein a hollowed-out area is arranged in the middle of the frame membrane, the shape of the hollowed-out area is arranged corresponding to that of the anion membrane, and the area of the hollowed-out area is smaller than that of the anion membrane; the edge of the frame film is larger than the edge of the anion film and is used for covering the anion film.
4. 4. The edge sealing structure of the anion exchange membrane according to claim 3, wherein a plurality of first extending portions are respectively arranged at two ends of the anion exchange membrane, and the first extending portions extend towards the edge and are arranged in a central symmetry manner.
5. 5. The edge sealing structure of the anion exchange membrane according to claim 4, wherein the hollowed-out area of the frame membrane is provided with a plurality of second extending portions, and the second extending portions extend towards the inner side of the hollowed-out area and are arranged in a central symmetry manner.
6. 6. The edge sealing structure of an anion exchange membrane according to claim 5, wherein a plurality of flow openings are respectively arranged on the anode frame membrane and the cathode frame membrane, each flow opening comprises a first flow opening and a second flow opening, and the first flow openings are symmetrically arranged on two sides of the second flow opening.
7. 7. The anion exchange membrane edge sealing structure according to claim 6, wherein a plurality of fixing holes are further formed in a side of the frame membrane, which is close to the first flow port and the second flow port, respectively, for fixing.
8. 8. The anion exchange membrane edge sealing structure according to claim 5, wherein the first extension portion and the second extension portion are arranged in a staggered manner, and when the frame membrane is attached to the anion exchange membrane, the first extension portion and the second extension portion are partially overlapped for sealing.
9. 9. The anion exchange membrane seal structure of claim 6, wherein the first and second flow ports of the anode frame membrane are disposed in correspondence with the first and second flow ports of the cathode frame membrane.

Description

Anion exchange membrane banding structure Technical Field The utility model relates to the technical field of hydrogen production by water electrolysis, in particular to an edge sealing structure of an anion exchange membrane. Background In the technology of hydrogen production by water electrolysis, the existing sealing mode mainly adopts a sealing ring or a gasket to directly compress and seal or glue seal, but the methods have a plurality of defects, and the safety and the reliability of a hydrogen production system are seriously affected. Currently, the sealing ring or gasket is directly pressed to seal, and the sealing effect is realized by depending on physical pressure. However, the anionic membrane has the property of swelling when in contact with water, and the volume of the anionic membrane increases and the pores expand after the anionic membrane absorbs water in the electrolysis process. Such physical changes may cause an increase in the sealing gap between the seal ring or gasket and the anion membrane, thereby causing gas leakage. Furthermore, during long-term operation, the seal may lose its sealing properties due to fatigue, aging or deformation. In particular, under conditions of high temperature, high pressure or frequent start-stop, the service life of the seal may be further shortened, resulting in an increased risk of leakage. The viscose sealing mode can provide certain sealing performance, but the anion membrane absorbs water and swells in the electrolysis process, the volume is increased, the binding force between the viscose and the surface of the membrane is easily reduced, gaps are further generated, and gas leakage is caused. For glue which is not easy to degum, the glue dispensing process is complicated, folds are easily generated at the glue dispensing position of the dry film glue dispensing, so that the glue quantity in the same sealing surface is unstable, the glue bonding is affected by wet film glue dispensing, the risks of unstable glue quantity and the like exist, air bubbles are easily generated in the glue filling process, so that the glue is not tight, the pressure is not uniform and the like, and the sealing effect is reduced. Conventional sealing means often have difficulty maintaining stable performance over long periods of time under these extreme conditions, are prone to aging, corrosion or failure, and further exacerbate leakage risk. Disclosure of utility model The utility model provides an anion exchange membrane edge sealing structure, which is used for more exactly solving the problem that the anion exchange membrane is easy to leak gas due to sealing failure and unstable sealing. The utility model is realized by the following technical scheme: The utility model provides an anion exchange membrane edge sealing structure which comprises an anion membrane and a frame membrane, wherein the frame membrane is arranged on two sides of the anion membrane and is fixedly connected with the anion membrane respectively; the frame membrane comprises an anode frame membrane and a cathode frame membrane, the anode frame membrane and the cathode frame membrane are correspondingly arranged, and the anion membrane is positioned between the anode frame membrane and the cathode frame membrane; The frame film is provided with a hot melt adhesive layer which is arranged opposite to the anion film; the frame film and the hot melt adhesive layer are formed by high-temperature hot pressing lamination; And sealing structures are respectively arranged on two sides of the frame film and are pressed and fastened on the frame film to form a seal. Further, the hot melt adhesive layer is provided with an adhesive surface, the adhesive surface is arranged corresponding to the frame film, and the adhesive surface is not leaked outside the hot melt adhesive layer. Further, a hollowed-out area is arranged in the middle of the frame film, the shape of the hollowed-out area is arranged corresponding to that of the anion film, and the area of the hollowed-out area is smaller than that of the anion film; the edge of the frame film is larger than the edge of the anion film and is used for covering the anion film. Further, a plurality of first extending parts are respectively arranged at two ends of the anion membrane, extend towards the edge and are arranged in a central symmetry mode. Furthermore, the hollow area of the frame film is provided with a plurality of second extending parts, and the second extending parts extend towards the inner side of the hollow area and are arranged in a central symmetry mode. Further, the anode frame film and the cathode frame film are respectively provided with a plurality of flow openings, each flow opening comprises a first flow opening and a second flow opening, and the first flow openings are symmetrically arranged on two sides of the second flow opening. Furthermore, a plurality of fixing holes are respectively formed in one side, close to the first flow por