CN213483788U - Integrated sealed membrane electrode structure - Google Patents
Integrated sealed membrane electrode structure Download PDFInfo
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- CN213483788U CN213483788U CN202022047937.8U CN202022047937U CN213483788U CN 213483788 U CN213483788 U CN 213483788U CN 202022047937 U CN202022047937 U CN 202022047937U CN 213483788 U CN213483788 U CN 213483788U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model relates to the technical field of fuel cells, and discloses an integrated sealed membrane electrode structure, which comprises a membrane component, a cathode protection frame, an anode protection frame, a cathode gas diffusion layer, an anode gas diffusion layer and a sealing rubber ring; the sealing rubber ring comprises a cathode sealing part, an anode sealing part and a chamber sealing part; the cathode sealing part comprises a cathode connecting part and a cathode flat skin part, the cathode connecting part is attached to the periphery of the surface of the cathode gas diffusion layer, and the cathode connecting part extends outwards to form the cathode flat skin part; the anode sealing part and the cathode sealing part are in symmetrical structures by taking the membrane assembly as a symmetrical shaft; the cathode skin flattening part is attached and connected with the anode skin flattening part of the anode sealing part to form an insulating skin flattening part, and both ends of the insulating skin flattening part along the length direction of the membrane component are provided with an inlet and outlet chamber; the edges of the two side surfaces of the insulating flat leather part, which are wound around the inlet and outlet chamber, are provided with chamber sealing parts; the cathode sealing part, the anode sealing part and the chamber sealing part are integrally formed to form the sealing rubber ring.
Description
Technical Field
The utility model relates to a fuel cell technical field especially relates to a membrane electrode structure that integration is sealed.
Background
The proton exchange membrane fuel cell is the most mature power generation device which converts chemical energy into electric energy by using hydrogen as a reducing agent and oxygen in air as an oxidizing agent, wherein the hydrogen is a renewable energy source and the oxygen is a renewable energy source.
The single cell of the fuel cell consists of an anode, a cathode and a proton exchange membrane. The three-in-one component which combines the anode, the proton exchange membrane and the cathode is called a membrane electrode.
The fuel cell stack is formed by stacking a plurality of single cells in series. Referring to fig. 1, the existing single cell packaging structure of a proton exchange membrane fuel cell includes a first bipolar plate 01, a cathode sealing glue line 02, a cathode gas diffusion layer 03, a cathode protection frame 04, a cathode catalyst layer 05, a proton exchange membrane 06, an anode catalyst layer 07, an anode protection frame 08, an anode gas diffusion layer 09, an anode sealing glue line 010, and a second bipolar plate 011. The cathode protection frame 04 and the anode protection frame 08 are respectively arranged on two sides of the proton exchange membrane 06 to clamp the proton exchange membrane, the cathode gas diffusion layer 03 is adhered to the surface of the cathode catalyst layer 05, and the anode gas diffusion layer 09 is adhered to the surface of the anode catalyst layer 07. The cathode protection frame 04 is hermetically connected with the first bipolar plate 01 through a cathode sealing glue line 02, and the anode protection frame 08 is hermetically connected with the second bipolar plate 011 through an anode sealing glue line 010.
The prior proton exchange membrane fuel cell stack packaging structure has the following defects:
1. the diffusion layer (MEA carbon paper) produced by the common process is directly bonded on the surface of the frame and is very easy to fall off;
2. there is no sealing structure between the cathode and anode protective frame and the bipolar plate, and the glue line is needed to be bonded between the cathode and anode protective frame and the bipolar plate to realize the sealing with the bipolar plate, and the sealing glue lines on the two sides are easy to be dislocated, thereby causing the sealing failure;
3. the bonding of the sealing glue line is realized manually, one side is bonded firstly, and the other side is bonded after curing, so that the production efficiency is low;
4. the cathode and anode protection frame needs to be accurately cut into three cavities corresponding to the bipolar plate to form gas inlet and outlet in advance, the requirement on the processing precision of the frame is very high, and therefore the processing difficulty is high.
Accordingly, there is a need in the art for improvements.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the utility model provides a membrane electrode structure that integration is sealed to solve among the proton exchange membrane fuel cell pile packaging structure of prior art diffusion barrier drop easily, sealed easy inefficacy, artifical bonding sealing rubber line inefficiency and the big technical problem of the processing degree of difficulty of processing negative and positive pole protection frame.
In order to achieve the above object, the utility model provides an integrated sealed membrane electrode structure, which comprises a membrane component, a cathode protection frame, an anode protection frame, a cathode gas diffusion layer, an anode gas diffusion layer and a sealing rubber ring, wherein the two sides of the membrane component are respectively a cathode side and an anode side; the cathode protection frame is arranged at the periphery of the surface of the cathode side; the surface periphery of the cathode gas diffusion layer is attached to the cathode protection frame, and the middle part of the surface of the cathode gas diffusion layer is attached to the cathode side; the anode protection frame is arranged at the periphery of the surface of the anode side; the surface periphery of the anode gas diffusion layer is attached to the anode protection frame, and the middle part of the surface of the anode gas diffusion layer is attached to the anode side; the sealing rubber ring comprises a cathode sealing part, an anode sealing part and a chamber sealing part; the cathode sealing part comprises a cathode connecting part and a cathode flat skin part, the cathode connecting part is attached to the periphery of the surface of the cathode gas diffusion layer, and the cathode connecting part extends outwards to form the cathode flat skin part; the anode sealing part comprises an anode connecting part and an anode skin flattening part, and the anode sealing part and the cathode sealing part are in a symmetrical structure by taking the membrane assembly as a symmetrical axis; the cathode flat leather part and the anode flat leather part are connected in an attaching mode to form an insulating flat leather part, and two ends of the insulating flat leather part along the length direction of the membrane assembly are provided with an inlet and outlet chamber; the cavity sealing parts are arranged on the surfaces of the two sides of the insulating flat leather part and around the edges of the inlet and outlet cavities; the cathode sealing part, the anode sealing part and the chamber sealing part are integrally formed to form the sealing rubber ring.
In some embodiments of the present application, a first frame groove is pressed at a surface periphery of one side of the cathode gas diffusion layer facing the cathode protective frame, and the first frame groove is engaged with the cathode protective frame so that a surface middle part of the cathode gas diffusion layer is attached to the cathode side; and the surface periphery of one side of the anode gas diffusion layer, which faces the anode protection frame, is provided with a second frame groove in a pressing manner, and the second frame groove is embedded with the anode protection frame to enable the surface middle part of the anode gas diffusion layer to be attached to the anode side.
In some embodiments of the present application, the width of the first frame groove is smaller than the width of the cathodic protection frame.
In some embodiments of the present application, a width of the cathode connection part is smaller than a width of the first frame groove.
In some embodiments, the edge of the cathode connection part is a slope inclined from outside to inside.
In some embodiments of the present application, the cathode flat skin portion includes a necking portion, a semi-convex portion, and a planar portion sequentially connected from inside to outside; the necking part corresponds to the edge of the cathodic protection frame, and the in-out chamber and the chamber sealing part are both arranged on the plane part.
In some embodiments of the present application, the cross-sectional shape of the half-convex is a semicircle or a half-ellipse.
In some embodiments, the ratio of the width of the first frame groove to the width of the cathodic protection frame is between 0.6 and 0.8.
In some embodiments of the present application, a ratio of a width of the cathode connection part to a width of the first frame groove is between 0.7 and 0.9.
In some embodiments of the present application, the chamber sealing part comprises a plurality of sealing unit parts connected to each other; the sealing unit part is arranged around the edge of the inlet and outlet chamber, and two ends of the sealing unit part are connected with the semi-convex part; adjacent sealing unit parts share the same side to form a connection relation; the cross-sectional shape of the sealing unit part is a semicircle or a semi-ellipse.
Compared with the prior art, the embodiment of the utility model provides a membrane electrode structure that integration is sealed, its beneficial effect lies in:
the sealing rubber lines are not required to be bonded manually, the situation that the sealing rubber lines on the two sides are displaced is avoided, the sealing effect is effectively improved, the production efficiency and the assembly efficiency are effectively improved, and the production cost is effectively reduced.
And secondly, the cathode and the anode can be completely separated and sealed, and the matching property with the bipolar plate is improved.
And the edge of the diffusion layer can be coated in the sealing structure, so that the diffusion layer is not easy to fall off, the strength is higher, and the assembly is not easy to damage.
Fourthly, the frame structure is simplified, and the processing difficulty and the processing cost of the frame are favorably reduced. Because no sealing structure is arranged between the membrane electrode and the frame in the prior art and only the sealing structure is arranged between the frame and the bipolar plate, the frame in the prior art needs to be provided with three cavities corresponding to the bipolar plate to enter and exit the cavity so as to avoid influencing the cell reaction. When the frame in the prior art is prepared, the process precision requirement for cutting the three cavities into and out of the cavity on the frame plate is high, so that the addition difficulty is high. And this application is owing to adopted the sealed technique of integration, separates sealed with the negative and positive poles totally to can directly form three chamber business turn over cavities on sealed rubber ring through moulding plastics, consequently need not set up three chamber business turn over cavities on the frame, the structure of frame is shown as figure 7, need not set up three chamber business turn over cavities, greatly reduced the processing degree of difficulty and processing cost.
Fifthly, the common use of the cathode sealing ring and the anode sealing ring can be realized, the limited line sealing is formed, the sealing reliability is greatly improved, the space of the sealing glue groove is saved, and the separated repeated sealing of the cathode and anode sealing glue lines is not needed.
Sixthly, when the galvanic pile is maintained, the glue lines do not need to be completely disassembled and assembled, and only the single membrane electrode unit with the problem needs to be replaced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is a schematic diagram of a single cell package structure of a PEM fuel cell in the prior art;
FIG. 2 is a schematic structural view of an integrally sealed membrane electrode structural unit and bipolar plate according to a preferred embodiment of the present invention;
fig. 3 is a schematic structural view of a cathode side of an integrally sealed membrane electrode assembly according to a preferred embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is an enlarged view at B in FIG. 4;
FIG. 6 is a schematic cross-sectional view taken at C-C in FIG. 3;
FIG. 7 is a schematic structural view of a membrane assembly, a cathodic protection frame and an anodic protection frame;
in the figure, 1, a membrane module; 2. a cathodic protection border; 3. an anode protection frame; 4. a cathode gas diffusion layer; 41. a first frame groove; 5. an anode gas diffusion layer; 51. a second frame groove; 6. sealing the rubber ring; 61. a cathode sealing part; 611. a cathode connection part; 6111. a bevel; 612. a cathode skin smoothing part; 6121. a necked-down portion; 6122. a half-convex portion; 6123. a planar portion; 62. an anode sealing part; 621. an anode connection part; 622. an anode skin flattening part; 63. a chamber sealing portion; 631. a sealing unit part; 7. and (4) entering and exiting the chamber.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
As shown in fig. 3-5, an integrated sealed membrane electrode structure according to a preferred embodiment of the present invention mainly includes a membrane module 1, a cathode protective frame 2, an anode protective frame 3, a cathode gas diffusion layer 4, an anode gas diffusion layer 5, and a seal rubber ring 6. The two sides of the membrane module 1 are a cathode side and an anode side, respectively. The Membrane module 1 in the present application is a three-in-one module prepared by respectively spraying an anode Catalyst layer and a cathode Catalyst layer on both sides of a proton exchange Membrane by using a spraying process, and is referred to as CCM (Catalyst Coated Membrane) in the industry. A three-in-one assembly in which the anode gas diffusion layer, the CCM, and the cathode gas diffusion layer are combined is called an MEA Membrane Electrode (MEA). The present application is applicable to the MEA membrane electrode preparation described above.
Referring to fig. 4 and 5, the cathode protection frame 2 is disposed at the surface periphery of the cathode side, the surface periphery of the cathode gas diffusion layer 4 is attached to the cathode protection frame 2, and the surface middle portion is attached to the cathode side. The anode protection frame 3 is arranged at the surface periphery of the anode side, the surface periphery of the anode gas diffusion layer 5 is attached to the anode protection frame 3, and the surface middle part is attached to the anode side.
Referring to fig. 3 and 5, the sealing rubber 6 includes a cathode sealing portion 61, an anode sealing portion 62, and a chamber sealing portion 63. Referring to fig. 5, the cathode sealing part 61 includes a cathode connecting part 611 and a cathode flat skin part 612, the cathode connecting part 611 is attached to the surface periphery of the cathode gas diffusion layer 4, and the cathode connecting part 611 extends outward to form the cathode flat skin part 612. The anode sealing part 62 includes an anode connecting part 621 and an anode skin part 622, and the anode sealing part 62 is symmetrical to the cathode sealing part 61 about the membrane module 1 as a symmetry axis. That is, the anode connecting portion 621 is attached to the periphery of the surface of the anode gas diffusion layer 5, and the anode connecting portion 621 extends outward to form the anode flat portion 622.
The cathode skin smoothing portion 612 and the anode skin smoothing portion 622 are attached to form an insulating skin smoothing portion, the two ends of the insulating skin smoothing portion along the length direction of the membrane module 1 are both provided with the inlet and outlet chamber 7, and the edges of the two side surfaces of the insulating skin smoothing portion around the inlet and outlet chamber 7 are both provided with the chamber sealing portion 63, as shown in fig. 3. It can be seen from fig. 3 that there are three sets of inlet and outlet chambers 7, which are inlet and outlet chambers for the oxidizing agent, the reducing agent and the coolant, respectively, and are the same as the chamber arrangement of the prior art, and therefore, the description of the present application is omitted.
The cathode seal 61, the anode seal 62 and the chamber seal 63 are integrally formed to form the seal rubber 6.
The preparation process of the integrally sealed membrane electrode structure 100 of the utility model is as follows:
firstly, clamping a membrane assembly 1 by using a cathode protective frame 2 and an anode protective frame 3, and pre-fixing a cathode gas diffusion layer 4 and an anode gas diffusion layer 5 on two sides of the membrane assembly 1 to form a pre-formed piece.
Secondly, the whole preformed piece is put into a corresponding injection mould capable of forming the sealing rubber ring 6, and liquid silica gel is injected through a cold runner.
And thirdly, liquid silica gel flows to the two sides of the frame and the diffusion layer through the mold, the mold is heated and solidified, and finally the mold is opened to take out the integrated sealed membrane electrode structure unit 100.
In actual production, one upper die and a plurality of lower dies can be used for continuous production. The prior art is adopted in the preparation of the mould and the injection molding process.
Referring to fig. 2, the membrane electrode assembly 100 is integrally formed by connecting both sides thereof to a cathode bipolar plate 110 and an anode bipolar plate 120, respectively.
The utility model provides a membrane electrode structure that integration is sealed forms a complete from taking seal membrane electrode unit with membrane electrode, frame and diffusion layer integrated into one piece, compares with prior art, and its beneficial effect includes:
the sealing rubber lines are not required to be bonded manually, the situation that the sealing rubber lines on the two sides are displaced is avoided, the sealing effect is effectively improved, the production efficiency and the assembly efficiency are effectively improved, and the production cost is effectively reduced.
And secondly, the cathode and the anode can be completely separated and sealed, and the matching property with the bipolar plate is improved.
And the edge of the diffusion layer can be coated in the sealing structure, so that the diffusion layer is not easy to fall off, the strength is higher, and the assembly is not easy to damage.
Fourthly, the frame structure is simplified, and the processing difficulty and the processing cost of the frame are favorably reduced. Because no sealing structure is arranged between the membrane electrode and the frame in the prior art and only the sealing structure is arranged between the frame and the bipolar plate, the frame in the prior art needs to be provided with three cavities corresponding to the bipolar plate to enter and exit the cavity so as to avoid influencing the cell reaction. When the frame in the prior art is prepared, the process precision requirement for cutting the three cavities into and out of the cavity on the frame plate is high, so that the addition difficulty is high. And this application is owing to adopted the sealed technique of integration, separates sealed with the negative and positive poles totally to can directly form three chamber business turn over cavities on sealed rubber ring through moulding plastics, consequently need not set up three chamber business turn over cavities on the frame, the structure of frame is shown as figure 5, need not set up three chamber business turn over cavities, greatly reduced the processing degree of difficulty and processing cost.
Fifthly, the common use of the cathode sealing ring and the anode sealing ring can be realized, the limited line sealing is formed, the sealing reliability is greatly improved, the space of the sealing glue groove is saved, and the separated repeated sealing of the cathode and anode sealing glue lines is not needed.
Sixthly, when the galvanic pile is maintained, the glue lines do not need to be completely disassembled and assembled, and only the single membrane electrode unit with the problem needs to be replaced.
In some embodiments of the present application, referring to fig. 5, a first frame groove 41 is pressed at a surface periphery of one side of the cathode gas diffusion layer 4 facing the cathode protective frame 2, and the first frame groove 41 is engaged with the cathode protective frame 2 so that a surface middle portion of the cathode gas diffusion layer 4 is attached to the cathode side. The anode gas diffusion layer 5 is symmetrical to the cathode gas diffusion layer 4 with the membrane module 1 as a symmetry axis. That is, the second frame groove 51 is pressed at the periphery of the surface of the anode gas diffusion layer 5 facing the anode protective frame 3, and the second frame groove 51 is fitted to the anode protective frame 3 so that the surface center of the anode gas diffusion layer 5 is bonded to the anode side. The frame groove is matched with the periphery of the surface of the frame, so that the mounting position fixity of the diffusion layer can be improved.
In some embodiments of the present application, referring to fig. 5, the width N of the first frame groove 41 is smaller than the width L of the cathodic protection frame 2. As can be seen from fig. 5, the arrangement makes the outer edges of the cathode and anode protective frames and the membrane module 1 extend beyond the outer edges of the cathode and anode gas diffusion layers, so as to prevent burrs generated after the cathode and anode gas diffusion layers are cut from piercing the proton exchange membrane (the thickness of the proton exchange membrane is only 10-30 um), which causes short circuit. And the arrangement enables the sealing rubber ring 6 to simultaneously contact the cathode gas diffusion layer 4 and the cathode protection frame 2, thereby being beneficial to increasing the sealing stability and improving the sealing effect. In FIG. 5, the edge of the cathode/anode protective frame is 0.2-2 mm longer than the edge of the cathode/anode gas diffusion layer.
In some embodiments of the present application, referring to fig. 5, the width M of the cathode connection part 611 is smaller than the width N of the first bezel 41. As can be seen from fig. 5, the above arrangement makes the inner edges of both-side injection-molded cathode and anode connecting parts shorter than the inner edges of the cathode and anode protective rims. In injection molding, the silicone gel flows before the mold is heated to cure, and the diffusion layer is typically a carbon paper, and is porous in structure, and the silicone gel can flow through the pores of the diffusion layer onto the frame or the film. With the increase of the service time of the battery, the silica gel can be degraded after a certain period, and the membrane electrode can be damaged after the silica gel is degraded. Due to the width arrangement, the silica gel can only flow to the cathode protection frame 2 and cannot flow to the membrane assembly 1, namely, the sealing part is completely isolated from the membrane assembly 1, so that the problem that the silica gel is in contact with the membrane assembly 1 can be solved, and the service life of the membrane assembly 1 is effectively prolonged. The inner edge of the cathode-anode connecting part in fig. 5 is shorter than the inner edge of the cathode-anode protective frame by 1-5 mm.
Since the anode side structure is arranged symmetrically to the cathode side structure, the width N, M, L is labeled on the anode side in fig. 5 for ease of reading.
In some embodiments of the present application, referring to fig. 5, the edge of the cathode connection part 611 is provided with a bevel 6111 inclined from the outside to the inside. The above arrangement effectively facilitates injection molding processing.
In some embodiments of the present application, referring to fig. 5, the cathode flat skin portion 612 includes a necked-down portion 6121, a semi-convex portion 6122 and a flat portion 6123 connected in sequence from inside to outside. The necking portion 6121 corresponds to the edge of the cathode protective frame 2, and the entrance chamber 7 and the chamber sealing portion 63 are provided in the flat surface portion 6123, as shown in fig. 3. Preferably, the sectional shape of the semi-convex portion 6122 is a semicircle or a semi-ellipse, and the cathode sealing portion 61 and the anode sealing portion 62 are bonded and connected to each other to form a circle or an ellipse. The provision of the half-protrusion 6122 facilitates subsequent assembly of the sealing rubber ring 6 with a bipolar plate, and the provision of the necked-down portion 6121 is equivalent to reserving a space for movement of the half-protrusion 6122, which facilitates slight compression or slight movement of the half-protrusion 6122 during assembly to adjust the mounting position.
In some embodiments of the present application, referring to fig. 3 and 6, the chamber sealing part 63 includes a plurality of sealing unit parts 631 connected to each other. The sealing unit 631 is disposed around the edge of the inlet/outlet chamber 7, and both ends thereof are connected to the semi-convex portions 6122. The adjacent sealing unit portions 631 share the same side to form a connection relationship, which facilitates integral molding in actual production. The shape of the sealing unit 631 is set according to the shape of the inlet and outlet chamber 7. In fig. 3, 3 sealing unit portions 631 are provided at each side, and 6 sealing unit portions 631 are provided at both sides in total. Referring to fig. 6, the cross-sectional shape of the sealing unit portion 631 is a semicircle or a semi-ellipse.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. An integrated sealed membrane electrode structure is characterized by comprising a membrane component, a cathode protective frame, an anode protective frame, a cathode gas diffusion layer, an anode gas diffusion layer and a sealing rubber ring, wherein the cathode side and the anode side are respectively arranged at two sides of the membrane component;
the cathode protection frame is arranged at the periphery of the surface of the cathode side; the surface periphery of the cathode gas diffusion layer is attached to the cathode protection frame, and the middle part of the surface of the cathode gas diffusion layer is attached to the cathode side;
the anode protection frame is arranged at the periphery of the surface of the anode side; the surface periphery of the anode gas diffusion layer is attached to the anode protection frame, and the middle part of the surface of the anode gas diffusion layer is attached to the anode side;
the sealing rubber ring comprises a cathode sealing part, an anode sealing part and a chamber sealing part;
the cathode sealing part comprises a cathode connecting part and a cathode flat skin part, the cathode connecting part is attached to the periphery of the surface of the cathode gas diffusion layer, and the cathode connecting part extends outwards to form the cathode flat skin part;
the anode sealing part comprises an anode connecting part and an anode skin flattening part, and the anode sealing part and the cathode sealing part are in a symmetrical structure by taking the membrane assembly as a symmetrical axis;
the cathode flat leather part and the anode flat leather part are connected in an attaching mode to form an insulating flat leather part, and two ends of the insulating flat leather part along the length direction of the membrane assembly are provided with an inlet and outlet chamber; the cavity sealing parts are arranged on the surfaces of the two sides of the insulating flat leather part and around the edges of the inlet and outlet cavities;
the cathode sealing part, the anode sealing part and the chamber sealing part are integrally formed to form the sealing rubber ring.
2. The integrally sealed membrane electrode assembly according to claim 1, wherein a first frame groove is pressed at a surface periphery of one side of the cathode gas diffusion layer facing the cathode protective frame, and the first frame groove is fitted to the cathode protective frame so that a surface middle part of the cathode gas diffusion layer is attached to the cathode side; and the surface periphery of one side of the anode gas diffusion layer, which faces the anode protection frame, is provided with a second frame groove in a pressing manner, and the second frame groove is embedded with the anode protection frame to enable the surface middle part of the anode gas diffusion layer to be attached to the anode side.
3. The integrally sealed membrane electrode assembly according to claim 2 wherein the width of the first frame groove is less than the width of the cathodic protection frame.
4. The integrally sealed membrane electrode assembly according to claim 2, wherein the width of the cathode connection portion is smaller than the width of the first frame groove.
5. The integrally sealed membrane electrode assembly according to claim 4, wherein the edge of the cathode connection portion is provided with a slope inclined from the outside to the inside.
6. The integrally sealed membrane electrode assembly according to claim 1, wherein the cathode flat skin portion comprises a necked-down portion, a semi-convex portion and a flat surface portion which are connected in this order from inside to outside; the necking part corresponds to the edge of the cathodic protection frame, and the in-out chamber and the chamber sealing part are both arranged on the plane part.
7. The integrally sealed membrane electrode assembly according to claim 6, wherein the sectional shape of the half-convex portion is a semicircle or a half ellipse.
8. The integrally sealed membrane electrode assembly according to claim 3, wherein the ratio of the width of said first frame groove to the width of said cathodic protection frame is between 0.6 and 0.8.
9. The integrally sealed membrane electrode assembly according to claim 4, wherein the ratio of the width of the cathode connecting portion to the width of the first frame groove is in the range of 0.7 to 0.9.
10. The integrally sealed membrane electrode assembly according to claim 6, wherein the chamber sealing portion comprises a plurality of sealing unit portions connected to each other; the sealing unit part is arranged around the edge of the inlet and outlet chamber, and two ends of the sealing unit part are connected with the semi-convex part; adjacent sealing unit parts share the same side to form a connection relation; the cross-sectional shape of the sealing unit part is a semicircle or a semi-ellipse.
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| CN202022047937.8U CN213483788U (en) | 2020-09-17 | 2020-09-17 | Integrated sealed membrane electrode structure |
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| CN202022047937.8U CN213483788U (en) | 2020-09-17 | 2020-09-17 | Integrated sealed membrane electrode structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112103541A (en) * | 2020-09-17 | 2020-12-18 | 广东国鸿氢能科技有限公司 | Integrated sealed membrane electrode structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112103541A (en) * | 2020-09-17 | 2020-12-18 | 广东国鸿氢能科技有限公司 | Integrated sealed membrane electrode structure |
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