Integrated electrolytic cell single chamber and integrated electrolytic cell

Abstract

The utility model provides an integrated electrolytic cell single chamber and an integrated electrolytic cell, and relates to the technical field of electrolysis, the integrated electrolytic cell single chamber comprises a membrane electrode assembly, a cathode transmission diffusion layer and a pole plate which are stacked in sequence, the membrane electrode assembly comprises a reaction area and a first connecting area located on the periphery of the reaction area, the polar plate comprises a flow field area and a second connecting area located on the periphery of the flow field area, the cathode transmission diffusion layer is located between the reaction area and the flow field area, and the first connecting area is connected with the second connecting area in an adhesive mode. A plurality of assemblies in the single cell of the electrolytic cell are integrated through glue connection, a tool for positioning and a corresponding limiting device for assembling are not needed, the use amount of raw materials is saved, the single cell of the electrolytic cell is directly glued and integrally installed in the production process, alignment assembly does not need to be carried out in the use process, the installation process is simple, convenient and rapid, and cost is reduced and efficiency is improved. Due to the design of the integrated electrolytic cell single chamber, after-sale disassembly and maintenance are facilitated, multiple assemblies do not need to be disassembled, and maintenance operation is easy and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolytic technique field, and particularly, relate to an integrated electrolytic cell single chamber and integrated electrolytic cell. BACKGROUND

[0002] At present, the conventional electrolytic cell single chamber such as Figure 1 As shown in the drawing, the structure in the single chamber or small chamber includes the core components such as polar plate 1, gasket 2, polar frame 3 and membrane electrode assembly 4, and the assembly process is also according to the positioning of tooling and the corresponding limiting polar frame 3 to sequentially and orderly stack, to form a small chamber, to reciprocate in turn, to form the electrolytic cell core and the electrolytic cell bare stack. UTILITY MODEL CONTENT

[0003] The utility model solves the problems of poor stability of electrolytic cell single chamber and complicated maintenance operation.

[0004] To solve the above problems, the utility model provides a kind of integrated electrolytic cell single chamber and integrated electrolytic cell.

[0005] Firstly, the utility model provides a kind of integrated electrolytic cell single chamber, including sequentially stacked membrane electrode assembly, cathode transmission diffusion layer and polar plate, the membrane electrode assembly includes reaction zone and the first connecting area located at the outer periphery of reaction zone, the polar plate includes flow field area and the second connecting area located at the outer periphery of flow field area, the cathode transmission diffusion layer is located between reaction zone and flow field area, and the first connecting area is connected with the second connecting area by adhesive.

[0006] Optionally, the polar plate includes the cathode side connected with the membrane electrode assembly, the polar plate is equipped with first glue groove at cathode side, and the first connecting area and the second connecting area are connected by adhesive film, and adhesive film part is arranged in first glue groove.

[0007] Optionally, at initial room temperature when the membrane electrode assembly and the polar plate are not connected, the height of adhesive film relative to the polar plate is 1.3-1.4 times of the height of cathode transmission diffusion layer relative to the polar plate.

[0008] Optionally, the reaction zone of membrane electrode assembly is connected with anode transmission diffusion layer on the side away from cathode transmission diffusion layer.

[0009] Optionally, the anode transmission diffusion layer is connected to the reaction zone by hot melt adhesive.

[0010] Optionally, hot melt adhesive is arranged at the side edge of anode transmission diffusion layer towards membrane electrode assembly.

[0011] Optionally, the positive projection of the anode transport diffusion layer on the plate coincides with the positive projection of the cathode transport diffusion layer on the plate.

[0012] Optionally, the membrane electrode assembly comprises, in order, a gas diffusion layer, a catalytic layer, a proton exchange membrane, a catalytic layer, and a gas diffusion layer.

[0013] In a second aspect, the utility model provides a kind of integrated electrolytic cell, including multiple sequentially stacked glue connections as described above integrated electrolytic cell single chamber, polar plate is bipolar plate, polar plate includes anode side away from cathode transport diffusion layer, the anode side of the polar plate of integrated electrolytic cell single chamber is glued to the membrane electrode assembly of the integrated electrolytic cell single chamber adjacent to this integrated electrolytic cell single chamber.

[0014] Optionally, the anode side of the polar plate of integrated electrolytic cell single chamber is connected to the first connecting area of the membrane electrode assembly of the integrated electrolytic cell single chamber adjacent to this integrated electrolytic cell single chamber by curing glue, and the polar plate is provided with a second glue groove at the anode side, and the curing glue is partially arranged in the second glue groove.

[0015] The utility model discloses a kind of integrated electrolytic cell single chamber and the beneficial effects of integrated electrolytic cell are: membrane electrode assembly and polar plate are connected by gluing, so that multiple components in electrolytic cell single chamber are integrated by glue connection, do not need to use tooling positioning and corresponding limiting device to assemble, save raw material consumption, directly glue connection in production process electrolytic cell single chamber, directly integrated installation, do not need to be in use and be assembled to position, so that installation process is simple and fast, cost reduction and efficiency increase;The components of previous electrolytic cell single chamber need to be assembled to position before use, so that the position inconsistency between components can lead to poor stability and low installation efficiency problem, the integrated electrolytic cell single chamber of the embodiment, integrated by glue connection, do not need to be assembled into a whole by limiting glue frame, can avoid the above problem;And, the design of integrated electrolytic cell single chamber is convenient for after-sales disassembly and repair, do not need to disassemble multiple components, and maintenance operation is simple. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic view of conventional electrolytic cell single chamber of the utility model background art;

[0017] Figure 2 It is the structure schematic view of integrated electrolytic cell single chamber of the utility model embodiment;

[0018] REFERENCE SIGNS:

[0019] 1, polar plate;11, anode side;12, cathode side;2, gasket;3, polar frame;4, membrane electrode assembly;5, anode transport diffusion layer;6, cathode transport diffusion layer;7, glue film;8, curing glue;9, hot melt adhesive. DETAILED DESCRIPTION

[0020] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments described herein, but rather, these embodiments are provided in order to more thoroughly and completely understand the present application. It should be understood that the drawings and embodiments of the present application are for exemplary purposes only, and are not intended to limit the scope of protection of the present application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application only for the purpose of describing a specific embodiment of the present application, and is not intended to limit the present application;

[0022] The term "comprising" and variations thereof as used herein are open-ended, that is "including, but not limited to"; the term "based on" is "based, at least in part, on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Related definitions are given throughout the detailed description. It should be noted that the concepts "first", "second", etc. mentioned in the present application are used to distinguish different objects, and are not used to describe a specific order or primary and secondary relationship. In addition, the terms "first", "second" are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0023] In view of the problems of the above related technologies, the embodiment provides a single-chamber integrated electrolytic cell and an integrated electrolytic cell.

[0024] As shown in Figure 2 The single-chamber integrated electrolytic cell provided by the embodiment of the present application comprises a membrane electrode assembly 4, a cathode transmission diffusion layer 6 and a polar plate 1 which are sequentially stacked, the membrane electrode assembly 4 comprises a reaction zone and a first connecting zone located at the outer periphery of the reaction zone, the polar plate 1 comprises a flow field zone and a second connecting zone located at the outer periphery of the flow field zone, the cathode transmission diffusion layer 6 is located between the reaction zone and the flow field zone, and the first connecting zone and the second connecting zone are adhesively connected.

[0025] In the embodiment, the membrane electrode assembly 4 and the polar plate 1 are connected by adhesive connection, so that multiple components in the single chamber of the electrolytic cell are integrated by adhesive connection, without the need for positioning and corresponding limiting devices for assembly, saving the amount of raw materials, directly connecting the electrolytic cell during production, directly integrated installation, without the need for alignment assembly during use, making the installation process simple and fast, reducing costs and increasing efficiency; the previous electrolytic cell single chamber needs to be assembled by aligning the components before use, which may cause inconsistent positions between the components, resulting in poor stability and low installation efficiency. The integrated electrolytic cell single chamber of the embodiment is integrated by adhesive connection, without the need for limiting adhesive frame assembly into a whole, which can avoid the above problems. In addition, the design of the integrated electrolytic cell single chamber facilitates after-sales disassembly and maintenance, without the need to disassemble multiple components, making the maintenance operation simple.

[0026] Optionally, the polar plate 1 includes a cathode side 12 connected to the membrane electrode assembly 4, and the polar plate 1 is provided with a first glue groove at the cathode side 12, and the first connecting area and the second connecting area are connected by the adhesive film 7, and the adhesive film 7 is partially arranged in the first glue groove.

[0027] The adhesive film 7 has good strength and hardness and can bear high pressure. The adhesive film 7 is used to connect the membrane electrode assembly 4 and the polar plate 1, eliminating the structure of the membrane electrode frame plate and the structure of the sealing ring, saving raw materials, and making the assembly process simple and fast, reducing costs and increasing efficiency.

[0028] It can be understood that the design details of the polar plate 1 in the embodiment can include that the polar plate 1 is a bipolar plate, the polar plate 1 includes a cathode side 12 connected to the membrane electrode assembly 4 and an anode side 11 opposite to the cathode side 12, the polar plate 1 is provided with a first glue groove at the cathode side 12, and the adhesive film 7 is partially arranged in the first glue groove; the first glue groove can be an annular structure around the cathode transmission diffusion layer 6, and the glue is dispensed along the track of the first glue groove, making the dispensing operation more convenient.

[0029] Optionally, at the initial room temperature when the membrane electrode assembly 4 and the polar plate 1 are not connected, the height of the adhesive film 7 relative to the polar plate 1 is 1.3-1.4 times the height of the cathode transmission diffusion layer 6 relative to the polar plate 1.

[0030] In the optional embodiment, the adhesive film 7 has no initial adhesion at room temperature, and the film electrode assembly 4 and the polar plate 1 are bonded and then hot-pressed, the adhesive film 7 is subjected to a pressure of 2 MPa, the glue on the adhesive film 7 melts at 120-150°C, and a cross-linking chemical reaction occurs on the contact surface of the film electrode assembly 4 and the polar plate 1. After cooling, the adhesive film 7 well bonds the film electrode assembly 4 and the polar plate 1, the height of the adhesive film 7 relative to the polar plate 1 at room temperature is 1.3-1.4 times the height of the cathode gas diffusion layer relative to the polar plate 1, which can ensure that the adhesive film 7 can still saturate the gap between the film electrode assembly 4 and the polar plate 1 after being pressed, and ensure that the cathode side 12 of the polar plate 1 is effectively sealed. After cooling, the peel strength of the adhesive film 7 reaches 20 N / mm, and the Shore hardness of the adhesive film 7 reaches 70A-85A.

[0031] Optionally, the reaction area of the film electrode assembly 4 is adhesively connected with an anode transport diffusion layer 5 away from the cathode transport diffusion layer 6.

[0032] Optionally, the anode transport diffusion layer 5 is connected to the reaction area of the film electrode assembly 4 by the hot melt adhesive 9.

[0033] In the optional embodiment, the anode transport diffusion layer 5 is sealed between the polar plate 1 and the film electrode assembly 4 of the adjacent electrolytic cell single chamber, and bears a smaller pressure. The hot melt adhesive 9 can be used to connect the anode transport diffusion layer 5 and the film electrode assembly 4, thereby reducing the cost.

[0034] Optionally, the hot melt adhesive 9 is arranged at the side edge of the anode transport diffusion layer 5 facing the film electrode assembly 4.

[0035] In the optional embodiment, the anode transport diffusion layer 5 is sealed between the polar plate 1 and the film electrode assembly 4 of the adjacent electrolytic cell single chamber, and bears a smaller pressure. The anode transport diffusion layer 5 can be connected to the reaction area of the film electrode assembly 4.

[0036] Optionally, the anode transport diffusion layer 5 is arranged on the polar plate 1.

[0037] Optionally, the film electrode assembly 4 comprises gas diffusion layers, a catalytic layer, a proton exchange film, a catalytic layer and gas diffusion layers stacked in sequence.

[0038] In the optional embodiment, a common five-in-one film electrode assembly 4 is selected, and raw materials are easy to obtain.

[0039] As described above, in the possible implementation, the gas diffusion layer comprises carbon paper or titanium adhesive.

[0040] The utility model discloses an integrated electrolytic cell, including a plurality of orderly stacked glue connection's integrated electrolytic cell single chamber as described above, pole plate 1 is bipolar plate, and pole plate 1 includes the anode side 11 away from cathode transmission diffusion layer 6, and the anode side 11 glue connection of pole plate 1 of integrated electrolytic cell single chamber is connected to the membrane electrode assembly 4 of the integrated electrolytic cell single chamber adjacent to this integrated electrolytic cell single chamber.

[0041] In the embodiment, the plurality of integrated electrolytic cell single chambers are connected by gluing to realize integration, without using fixtures for positioning and corresponding limiting devices for assembly, saving the amount of raw materials, and directly gluing the electrolytic cell single chambers during production to directly integrate and install, without alignment and assembly during use, so that the installation process is simple and fast, and cost is reduced and efficiency is increased.

[0042] As described above, the anode side 11 of the pole plate 1 is connected to the membrane electrode assembly 4 of the integrated electrolytic cell single chamber adjacent to the integrated electrolytic cell single chamber where the pole plate 1 is located, so that the plurality of integrated electrolytic cell single chambers are sequentially connected to realize integration.

[0043] As described above, in a possible embodiment, the anode side 11 of the pole plate 1 of the integrated electrolytic cell single chamber is connected to the first connection area of the membrane electrode assembly 4 of the integrated electrolytic cell single chamber adjacent to the integrated electrolytic cell single chamber by the cured glue 8, and the second glue groove is arranged on the anode side 11 of the pole plate 1.

[0044] Optionally, the anode side 11 of the pole plate 1 is connected to the first connection area of the membrane electrode assembly 4 of the adjacent integrated electrolytic cell single chamber that is not covered by the anode transmission diffusion layer 5 by the cured glue 8, the cured glue 8 fills the gap between the pole plate 1 and the membrane electrode assembly 4 of the adjacent integrated electrolytic cell single chamber, ensures that the anode side 11 of the pole plate 1 is effectively sealed, and seals the anode transmission diffusion layer 5 between the pole plate 1 and the membrane electrode assembly 4 of the adjacent integrated electrolytic cell single chamber to form an integrated electrolytic cell.

[0045] In a possible embodiment, the cured glue 8 is UV-cured glue, and the Shore hardness after curing reaches 65A-80A.

[0046] In this optional embodiment, the second glue groove can have a ring structure, and glue is dispensed along the track of the second glue groove, which is more convenient for dispensing operation.

[0047] As described above, in a possible embodiment, a plurality of second glue grooves can be arranged on the anode side 11 of the pole plate 1, so that the sealing performance between the pole plate 1 and the membrane electrode assembly 4 of the adjacent integrated electrolytic cell single chamber is better.

[0048] The utility model is further described below in combination with specific embodiments.

[0049] Example 1, preparation of an integrated electrolytic cell.

[0050] As Figure 2 shown, take the common five-in-one membrane electrode assembly 4, glue and stick in the transition zone or non-active area, wherein the transition zone or non-active area refers to the area in the membrane electrode assembly 4 plays a sealing and fixing function, mostly as the annular edge area of the membrane electrode assembly 4, using spray valve dispensing, glue is a common hot melt glue 9, good stability, the anode diffusion layer 5 is glued to the anode side of the membrane electrode assembly 4, the cathode diffusion layer 6 is arranged on the other side of the cathode side of the membrane electrode assembly 4, after the whole plane is flat, it is pasted with the plate 1, the cathode side 12 of the plate 1 corresponds to the cathode side of the membrane electrode assembly 4, and the two are connected by the adhesive film 7, which has no initial adhesion at room temperature, and the thickness of the adhesive film 7 is higher than 35% of the thickness of the cathode diffusion layer 6, the plate 1 and the membrane electrode assembly 4 are pasted and then heat pressed, the pressure of the adhesive film 7 reaches 2MPa, the glue on the adhesive film 7 melts at 120-150 DEG C, and the crosslinking chemical reaction occurs on the contact surface of the plate 1 and the membrane electrode assembly 4, after cooling, the adhesive film 7 well bonds the plate 1 and the membrane electrode assembly 4, the peeling force reaches 20N / mm, and the Shore hardness of the adhesive film 7 reaches 70A-85A, the cathode side 12 is effectively sealed, and the integrated electrolytic cell single chamber is formed; then the plate 1 is glued on the anode side 11, the plate 1 is provided with two circles of second glue grooves on the anode side 11 for two sealing dispensing of the plate 1, the adhesive used is UV curing adhesive, the anode side 11 of the plate 1 is pasted with the anode side of the adjacent integrated electrolytic cell single chamber, and the Shore hardness of the UV curing adhesive reaches 65A-80A after curing, a plurality of integrated electrolytic cell single chambers are sequentially stacked and connected, and the integrated electrolytic cell is formed.

[0051] Although the utility model discloses as above, the protection scope of the utility model is not limited to this only. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will all fall within the protection scope of the utility model.

Claims

1. An integrated electrolytic cell single compartment, characterized by, The MEA (4) includes a reaction zone and a first connecting zone located at the periphery of the reaction zone, the bipolar plate (1) includes a flow field zone and a second connecting zone located at the periphery of the flow field zone, and the cathode transfer diffusion layer (6) is located between the reaction zone and the flow field zone, and the first connecting zone is adhesively connected to the second connecting zone.

2. The integrated electrolytic cell single compartment of claim 1, wherein, The bipolar plate (1) includes a cathode side (12) connected to the MEA (4), and the bipolar plate (1) is provided with a first glue groove at the cathode side (12), and the first connecting zone is connected to the second connecting zone through the adhesive film (7), and the adhesive film (7) is partially arranged in the first glue groove.

3. The integrated electrolytic cell single compartment of claim 2, wherein, The height of the adhesive film (7) relative to the bipolar plate (1) is 1.3-1.4 times the height of the cathode transfer diffusion layer (6) relative to the bipolar plate (1) at the initial room temperature when the MEA (4) and the bipolar plate (1) are not connected.

4. The integrated electrolytic cell single compartment of claim 1, wherein, The reaction zone of the MEA (4) is adhesively connected to an anode transfer diffusion layer (5) on the side away from the cathode transfer diffusion layer (6).

5. The integrated electrolytic cell single compartment of claim 4, wherein, The anode transfer diffusion layer (5) is connected to the reaction zone by hot melt adhesive (9).

6. The integrated electrolytic cell single compartment of claim 5, wherein, The hot melt adhesive (9) is arranged at the side edge of the anode transfer diffusion layer (5) facing the MEA (4).

7. The integrated electrolytic cell single compartment of claim 4, wherein, The anode transfer diffusion layer (5) is adhesively connected to the MEA (4) on the anode side (11) of the bipolar plate (1).

8. The integrated electrolytic cell single compartment of claim 1, wherein, The MEA (4) includes a gas diffusion layer, a catalyst layer, a proton exchange membrane, a catalyst layer, and a gas diffusion layer stacked in sequence.

9. An integrated electrolysis cell characterized by, The bipolar plate (1) is a bipolar plate, and the anode side (11) of the bipolar plate (1) of the integrated electrolytic cell single chamber is adhesively connected to the MEA (4) of the integrated electrolytic cell single chamber adjacent to the integrated electrolytic cell single chamber.

10. The integrated electrolytic cell of claim 9, wherein, The anode side (11) of the bipolar plate (1) of the integrated electrolytic cell single chamber is connected to the first connecting zone of the MEA (4) of the integrated electrolytic cell single chamber adjacent to the integrated electrolytic cell single chamber by the cured adhesive (8), and the bipolar plate (1) is provided with a second glue groove at the anode side (11), and the cured adhesive (8) is partially arranged in the second glue groove.

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