CN114430051A - Membrane electrode injection molding sealing structure - Google Patents
Membrane electrode injection molding sealing structure Download PDFInfo
- Publication number
- CN114430051A CN114430051A CN202011187485.1A CN202011187485A CN114430051A CN 114430051 A CN114430051 A CN 114430051A CN 202011187485 A CN202011187485 A CN 202011187485A CN 114430051 A CN114430051 A CN 114430051A
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- Prior art keywords
- membrane electrode
- injection molding
- sealing ring
- sealing
- injection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/028—Sealing means characterised by their material
- H01M8/0284—Organic resins; Organic polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to a membrane electrode injection sealing structure which comprises a membrane electrode and an injection sealing ring, wherein injection holes are distributed on the frame of the membrane electrode, the injection sealing ring is an upper sealing ring unit, a lower sealing ring unit and a plurality of sealing column units which are of an integrated structure, the sealing column units are positioned between the upper sealing ring unit and the lower sealing ring unit and penetrate through the injection holes, so that the upper sealing ring unit and the lower sealing ring unit are injected on the front surface and the back surface of the membrane electrode, and the membrane electrode and the injection sealing ring form a whole. Compared with the prior art, the injection molding sealing ring is directly injected on the membrane electrode, so that the injection molding sealing ring and the membrane electrode form an integral part; when the bipolar plate is installed and sealed, the sealing can be realized only by directly pressing the integral part with the bipolar plate without additional materials, the assembly is simple and convenient, and the production efficiency is high.
Description
Technical Field
The invention relates to the field of hydrogen fuel cells, in particular to an injection molding sealing structure of a membrane electrode.
Background
In a conventional hydrogen fuel cell, the bipolar plate and the membrane electrode are mounted and sealed in the following manner: as shown in fig. 8, a glue line 4 is provided in the sealing groove 31 of the bipolar plate 3, and then the bipolar plate 3 and the membrane electrode 1 are bonded to each other. The traditional installation sealing method has the following problems: 1. the bonding process is complex, the production steps are multiple, and the efficiency is low. 2. The frame and the bipolar plate of the membrane electrode are easy to be slightly dislocated, and gas leakage can occur.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an injection molding sealing structure of a membrane electrode.
The purpose of the invention can be realized by the following technical scheme:
the membrane electrode injection molding sealing structure comprises a membrane electrode and an injection molding sealing ring, wherein injection molding holes are distributed in the frame of the membrane electrode, the injection molding sealing ring is an upper sealing ring unit, a lower sealing ring unit and a plurality of sealing column units which are of an integrated structure, the sealing column units are positioned between the upper sealing ring unit and the lower sealing ring unit and penetrate through the injection molding holes, so that the upper sealing ring unit and the lower sealing ring unit are injected on the front surface and the back surface of the membrane electrode, and the membrane electrode and the injection molding sealing ring form a whole.
The bipolar plate is respectively arranged on the front surface and the back surface of the membrane electrode, a sealing groove is arranged on the bipolar plate, and the injection molding sealing ring is embedded in the sealing groove.
Furthermore, the injection molding sealing ring is made of ethylene propylene diene monomer or silicon rubber.
Further, the injection molding sealing ring is made of hydrogenated nitrile rubber, fluororubber or fluorosilicone rubber.
Furthermore, the membrane electrode comprises a proton membrane and a frame, the frame wraps the periphery of the proton membrane, and the injection molding holes are distributed on the outer ring of the proton membrane.
Furthermore, an anode gas outlet, a cooling liquid outlet, a cathode gas inlet, a cathode gas outlet, a cooling liquid inlet and an anode gas inlet are arranged on the frame, and the injection molding holes are distributed on the outer rings of the outlets and the inlets.
Furthermore, anode carbon paper and cathode carbon paper are respectively arranged on the upper surface and the lower surface of the proton membrane.
Further, the cross section of the injection molding sealing ring is rectangular.
Furthermore, the upper edge and the lower edge of the rectangle are convex arcs.
Further, the upper and lower sides of the rectangle are provided with convex triangles.
Compared with the prior art, the invention has the following advantages:
1. the injection molding sealing ring is directly injected on the membrane electrode, so that the injection molding sealing ring and the membrane electrode form an integral part; when the bipolar plate is installed and sealed, the sealing can be realized only by directly pressing the integral part with the bipolar plate without additional materials, the assembly is simple and convenient, and the production efficiency is high.
2. The injection molding sealing ring is used as a limiting structure on the membrane electrode and can be matched with a sealing groove on the bipolar plate, so that the bipolar plate and the membrane electrode are positioned mutually, the assembly is ensured to be completely aligned, and the air tightness is ensured.
3. The injection molding sealing ring can be made of silicone rubber and ethylene propylene diene monomer rubber, and the material can be molded at low injection molding pressure and low temperature, is convenient to process and is beneficial to reducing the production cost.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
3 FIG. 3 2 3 is 3 a 3 schematic 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 31 3. 3
FIG. 3 is a schematic sectional view B-B of FIG. 1.
Fig. 4 is a schematic structural diagram of the first embodiment after the bipolar plate is added.
Fig. 5 is a schematic structural diagram of the second embodiment.
Fig. 6 is a schematic structural diagram of the third embodiment.
Fig. 7 is a schematic structural view of another shape according to the third embodiment.
Fig. 8 is a schematic structural diagram of the prior art.
Reference numerals: 1. the membrane electrode assembly comprises a membrane electrode 11, a frame 111, injection molding holes 112, an anode gas outlet 113, a cooling liquid outlet 114, a cathode gas inlet 115, a cathode gas outlet 116, a cooling liquid inlet 117, an anode gas inlet 12, a proton membrane 13, anode carbon paper 14, cathode carbon paper 2, an injection molding sealing ring 21, an upper sealing ring unit 22, a lower sealing ring unit 23, a sealing column unit 3, a bipolar plate 31, a sealing groove 4 and a glue line.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example one
As shown in fig. 1 to 3, the present embodiment provides a membrane electrode injection sealing structure, which includes a membrane electrode 1 and an injection sealing ring 2. The membrane electrode 1 includes a proton membrane 12 and a frame 11. The upper and lower surfaces of the proton membrane 12 are respectively provided with anode carbon paper 13 and cathode carbon paper 14. The frame 11 is provided with an anode gas outlet 112, a cooling liquid outlet 113, a cathode gas inlet 114, a cathode gas outlet 115, a cooling liquid inlet 116, and an anode gas inlet 117. Injection molding holes 111 are distributed on the frame 11 of the membrane electrode 1, specifically on the outer ring of the proton membrane 12, and the outer rings of the outlets and inlets. The injection-molded seal ring 2 is an upper seal ring unit 21, a lower seal ring unit 22 and a plurality of seal column units 23 of an integrated structure. The sealing column unit 23 is positioned between the upper sealing ring unit 21 and the lower sealing ring unit 22 and penetrates through the injection molding hole 111, so that the upper sealing ring unit 21 and the lower sealing ring unit 22 are injection molded on the front surface and the back surface of the membrane electrode 1, and the membrane electrode 1 and the injection molding sealing ring 2 form a whole.
As shown in fig. 4, the present embodiment further includes bipolar plates 3, the bipolar plates 3 being respectively mounted on the front and back sides of the membrane electrode 1. The double click plate is provided with a seal groove 31, and the injection seal ring 2 is fitted in the seal groove 31.
The injection molding sealing ring 2 can be made of ethylene propylene diene monomer or silicon rubber, and the materials can be molded under low injection molding pressure and low temperature, so that the processing is convenient, and the production cost is favorably reduced. The injection molding sealing ring 2 can also be made of hydrogenated nitrile rubber, fluororubber or fluorosilicone rubber.
In the embodiment, the injection molding sealing ring 2 is directly injected on the membrane electrode 1, so that the two parts form an integral part; when the bipolar plate 3 is installed and sealed, the whole parts are directly pressed with the bipolar plate 3 to realize sealing without additional materials, the assembly is simple and convenient, and the production efficiency is high. Meanwhile, the injection molding sealing ring 2 is used as a limiting structure on the membrane electrode 1 and can be matched with the sealing groove 31 on the bipolar plate 3, so that the bipolar plate 3 and the membrane electrode 1 are positioned mutually, the assembly is ensured to be completely aligned, and the air tightness is ensured.
Example two
As shown in fig. 5, the present embodiment is different from the first embodiment in that: the upper and lower edges of the rectangle are convex arcs.
EXAMPLE III
As shown in fig. 6 and 7, the present embodiment is different from the first embodiment in that: the upper and lower sides of the rectangle are provided with outward convex triangles, the distribution form of the triangles is not limited, and the triangles are used for improving the sealing property,
the foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a membrane electrode seal structure of moulding plastics, its characterized in that, includes membrane electrode (1) and injection moulding sealing washer (2), it moulds plastics hole (111) to distribute on frame (11) of membrane electrode (1), injection moulding sealing washer (2) upper seal ring unit (21), lower seal ring unit (22) and a plurality of sealed post unit (23) of formula structure as an organic whole, sealed post unit (23) are located between upper seal ring unit (21) and lower seal ring unit (22) and pass injection moulding hole (111), make upper seal ring unit (21) and lower seal ring unit (22) mould plastics at the front and the back of membrane electrode (1), membrane electrode (1) and injection moulding sealing washer (2) form a whole.
2. The membrane electrode injection molding sealing structure according to claim 1, further comprising a bipolar plate (3), wherein the bipolar plate (3) is respectively installed on the front surface and the back surface of the membrane electrode (1), a sealing groove (31) is formed on the bipolar plate (3), and the injection molding sealing ring (2) is embedded in the sealing groove (31).
3. The membrane electrode injection molding sealing structure according to claim 1, wherein the injection molding sealing ring (2) is made of ethylene propylene diene monomer or silicone rubber.
4. The membrane electrode injection molding sealing structure according to claim 1, wherein the injection molding sealing ring (2) is made of hydrogenated nitrile rubber, fluorine rubber or fluorine silicone rubber.
5. The membrane electrode injection molding sealing structure according to claim 1, wherein the membrane electrode (1) comprises a proton membrane (12) and a frame (11), the frame (11) wraps the proton membrane (12), and the injection molding holes (111) are distributed on the outer ring of the proton membrane (12).
6. The membrane electrode injection molding sealing structure according to claim 5, wherein an anode gas outlet (112), a cooling liquid outlet (113), a cathode gas inlet (114), a cathode gas outlet (115), a cooling liquid inlet (116) and an anode gas inlet (117) are arranged on the frame (11), and the injection molding holes (111) are distributed on the outer ring of each outlet and inlet.
7. The membrane electrode injection molding and sealing structure according to claim 5, wherein the upper surface and the lower surface of the proton membrane (12) are respectively provided with anode carbon paper (13) and cathode carbon paper (14).
8. The membrane electrode injection sealing structure according to claim 1, wherein the cross section of the injection sealing ring (2) is rectangular.
9. The membrane electrode injection molding and sealing structure according to claim 8, wherein the upper and lower edges of the rectangle are convex arcs.
10. The membrane electrode injection molding sealing structure according to claim 8, wherein the upper and lower sides of the rectangle have outward protruding triangles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011187485.1A CN114430051A (en) | 2020-10-29 | 2020-10-29 | Membrane electrode injection molding sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011187485.1A CN114430051A (en) | 2020-10-29 | 2020-10-29 | Membrane electrode injection molding sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114430051A true CN114430051A (en) | 2022-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011187485.1A Pending CN114430051A (en) | 2020-10-29 | 2020-10-29 | Membrane electrode injection molding sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114430051A (en) |
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2020
- 2020-10-29 CN CN202011187485.1A patent/CN114430051A/en active Pending
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