CN109390610B - Fuel cell membrane electrode production and packaging process - Google Patents
Fuel cell membrane electrode production and packaging process Download PDFInfo
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- CN109390610B CN109390610B CN201811194333.7A CN201811194333A CN109390610B CN 109390610 B CN109390610 B CN 109390610B CN 201811194333 A CN201811194333 A CN 201811194333A CN 109390610 B CN109390610 B CN 109390610B
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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
- H01M8/0286—Processes for forming seals
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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
- 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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- 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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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a production and packaging process of a fuel cell membrane electrode, which comprises the following steps: (a) selecting a fixed column for the alignment device and adjusting the position of the fixed column; (b) gradually mounting the cut frames on an alignment device in each layer in sequence, and flattening and compacting the sealed frame on one side to be thermally sealed by using an adjustable pressure plate; (c) preprocessing a membrane electrode sealing frame by using a heat sealing system; (d) purging the pretreated membrane electrode sealing frame; (e) putting a proton exchange membrane between the two layers of frames, closing the two layers of sealed frames, and finishing alignment of the sealed frames; (f) adjusting the position of the membrane electrode in the sealing frame; (g) pressing the three layers into the upper and lower protective layers, and performing hot-press shaping in a hot-press system. The invention greatly reduces the operation difficulty of the membrane electrode assembly process and reduces the technical level requirement of production enterprises on membrane electrode assembly workers.
Description
Technical Field
The invention relates to a production and packaging process of a membrane electrode of a fuel cell, belonging to the technical field of fuel cells.
Background
At present, the development of the fuel cell industry is uneven, a certain distance exists between the technology level and the production level of China and developed countries, and the models and the sizes of fuel cell electric piles cannot be unified. On the basis, the membrane electrodes processed and produced by related companies or research institutions are generally characterized by complicated sizes, small quantity and most of the membrane electrodes need to be customized, so that the design for large-scale and standardized production cannot be well developed.
Because large-scale standardized production cannot meet a large number of special-size customized requirements, it is a common situation that an operator manually processes and produces a fuel cell membrane electrode, that is, the operator seals a cut proton exchange membrane into a sealing protection frame when assembling the membrane electrode, and a sandwich type sealing method is generally used, that is, the proton exchange membrane is sealed into two layers of sealing protection frames. In the processing process, the upper and lower sealing frames of the membrane electrode need to be strictly aligned for the subsequent stacking requirement, otherwise, the problem that the membrane electrode cannot be embedded into the positioning column subsequently is caused. In addition, the proton exchange membrane is very thin and is very easy to absorb moisture in the air to cause deformation, so that the proton exchange membrane is often looped or folded in the assembling process, so that the proton exchange membrane is difficult to be formed at one time under the condition of manual operation, the operation requirement on workers is high, and the efficiency is low.
The prior art patent application No. 201210016352.7 discloses that alignment marks are applied to corresponding positions on a sealing frame by using upper and lower layers, and a pattern is formed in a direction perpendicular to the plane of the sealing frame according to a cathode alignment mark and an anode pair unmarked, thereby achieving alignment of the sealing frame. The method is only suitable for the large-scale production of the membrane electrode with a single model, and cannot flexibly deal with the production of the membrane electrodes with different models and sizes, and the production has the defects.
The utility model discloses it is fixed with proton exchange membrane to have used the air suction plate in patent application number 201710134302.1's the patent, uses the location processing marking counterpoint the back, with a hot pressing frame hot pressing to proton exchange membrane on, operate the shaping after will wholly overturning again. The method seems to be simple and feasible, but still needs to align the upper and lower sealing frames by manual operation, and the marking lines need to be determined again after the size of the produced membrane electrode is changed. The production flexibility is poor, and the product quality is difficult to control.
Patent application No. 201310732881.1, which uses a "face-to-face" lamination process, but the two sealing frames are not aligned effectively before lamination, which makes the practical operation difficult. In addition, a great amount of bubbles are easily brought in when the pressure-sensitive adhesive is used for manufacturing the frame by the method, and the manufactured frame has poor stability.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a production and packaging process of the membrane electrode of the fuel cell, which is simple and feasible, greatly reduces the operation difficulty of the membrane electrode assembly process, and reduces the technical level requirements of production enterprises on membrane electrode assembly workers.
In order to solve the technical problem, the invention provides a production and packaging process of a fuel cell membrane electrode, which is characterized by comprising the following steps:
(a) selecting a fixed column for the alignment device and adjusting the position of the fixed column;
(b) gradually mounting the cut frames on an alignment device in each layer in sequence, and flattening and compacting the sealed frame on one side to be thermally sealed by using an adjustable pressure plate;
(c) performing lateral heat sealing treatment by using a heat sealing system, and automatically fixing and aligning the treated sealing frame to obtain a pretreated membrane electrode sealing frame;
(d) flattening the pretreated membrane electrode sealing frames on a clean protection gasket, opening the two sealing frames, and blowing and sweeping the sealing frames clean by using air;
(e) putting a proton exchange membrane between the two layers of frames, closing the two layers of sealed frames, and finishing alignment of the sealed frames;
(f) adjusting the position of the membrane electrode in the sealing frame to center the membrane electrode, and slightly moving the sealing frame to change the position relation between the proton exchange membrane and the sealing frame;
(g) pressing the three layers into an upper protective layer and a lower protective layer, and entering a hot pressing system for hot pressing and shaping;
the alignment device comprises a fixing assembly and a sliding positioning assembly, wherein the fixing assembly comprises a base plate, slotted holes are formed in two ends of the base plate, and fixing columns are inserted into the slotted holes; the end part of the base plate is provided with a pressure plate base, and an adjustable pressure plate is arranged on the pressure plate base; the sliding positioning assembly is arranged in an undercut region of the base plate close to the slotted hole in one side and comprises a sliding positioning shaft and a sliding block, the shaft part of the sliding positioning shaft penetrates through a shaft hole in the sliding block, rolling shafts at two ends of the sliding positioning shaft slide in the undercut region of the base plate, and the sliding block is provided with a fixed column.
Further, in the step (c), the heat sealing system is an electric soldering iron or a heating resistance wire.
Further, in the step (c), the sealing frame is provided with a hot melt adhesive layer.
In step (e), the proton exchange membrane is a proton exchange membrane carrying a catalytic layer or only one of the proton exchange membranes.
Further, in the step (g), the hot press forming is line contact rolling pressing.
Furthermore, the left end and the right end of the aligning device can be used.
Furthermore, the fixing column is changed into different sizes according to the requirements of processing parts.
The invention achieves the following beneficial effects: the membrane electrode sealing frame is preprocessed by using a heat sealing system, and the upper layer frame and the lower layer frame are not required to be aligned, so that the processing efficiency and the accuracy are greatly improved. The membrane electrode production packaging process provided by the invention is simple and feasible, the operation difficulty of the membrane electrode assembly process is greatly reduced, and the technical level requirements of production enterprises on membrane electrode assembly workers are reduced.
Drawings
FIG. 1 is a perspective assembly view of a fuel cell membrane electrode seal frame alignment device of the present invention;
FIG. 2 is a schematic structural diagram of a fuel cell membrane electrode sealing frame aligning device in example 1 of the present invention;
FIG. 3 is a schematic structural diagram of a fuel cell membrane electrode sealing frame aligning device in example 2 of the present invention;
FIG. 4 is a flow chart of a fuel cell membrane electrode production packaging process of the present invention;
FIG. 5 is the distance the transparent region of heat seal material extends relative to the heat seal edge;
FIG. 6 is a graph comparing the heat sealing effect of sealed frames of the same material at different temperatures and times;
figure 7 is a graph comparing the heat sealing effect of different material sealed frames at the same temperature and time.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the aligning device for the membrane electrode sealing frame of the fuel cell comprises a fixing component and a sliding positioning component, wherein the fixing component comprises a rectangular plate-shaped base plate 4, two ends of the base plate 4 are respectively provided with two slotted holes, and fixing columns 5 are inserted into the slotted holes; the tip of base plate 4 is equipped with clamp plate base 8, be equipped with adjustable clamp plate 7 on the clamp plate base 8.
Sunken regional installation slide positioning assembly is seted up in the region that base plate 4 is close to one side slotted hole, slide positioning assembly includes slide positioning axle 1 and slider 2, the axle hole on slider 2 is passed to 1 axial region of slide positioning axle, slide positioning axle 1's both ends roller bearing slides in the sunken region of base plate 4, slide positioning axle 1's both ends roller bearing direct embedding base plate 4 in the guide slot 3 in the sunken region, 3 parts of slide positioning axle both ends embedding guide slot are one of cylinder, cuboid or spheroid. The sliding block 2 is provided with a fixing column 5, and the fixing column 5 is a replaceable fixing column, so that processing of the membrane electrode sealing frames of the fuel cells with different sizes is realized. A replaceable cushion plate 6 is arranged in the sunken area of the base plate 4, and when a large sealing frame is machined, the large sealing frame can be cushioned in the sunken area of the sliding positioning assembly, so that the positioning effect is improved. Fig. 2 and 9 in fig. 3 show the sealing frame of the membrane electrode of the fuel cell of the present invention.
And (3) carrying out alignment fixing treatment on the cut sealing frame by using a membrane electrode sealing frame alignment device, wherein the process is called a sealing frame alignment fixing process, and obtaining the pretreated sealing frame. And (3) directly performing a packaging process by using the pretreated sealing frame, wherein the process is called a proton exchange membrane assembly heat sealing process.
The alignment and fixation process of the sealing frame is as follows:
(1) the size of the fixed column is determined according to the detailed size of the processed membrane electrode, if a circular positioning hole exists on the membrane electrode, the fixed column with the same aperture as the circular positioning hole is selected, if no positioning hole exists on the membrane electrode, the frame corner of the effective area of the membrane electrode can be selected as a positioning reference, and a square or circular fixed column (depending on whether a chamfer or a fillet exists) is selected.
(2) The positions of the fixed columns are adjusted, so that the positioning holes in the membrane electrode sealing frame can be accurately installed in the corresponding fixed columns.
(3) And gradually installing the cut frames on the aligning device in sequence on each layer, wherein the frame material is provided with a hot melt adhesive layer.
(4) And flattening and compacting the side sealing frame needing heat sealing by using an adjustable pressure plate.
(5) And (3) carrying out lateral heat sealing treatment at a certain temperature and time by using a low-temperature electric iron according to the actual thickness and size of the material. In general, the material thickness is 150 μm or less, and the heat treatment at 120 ℃ for 20 seconds is selected. The actual situation can be adjusted with more material parameter changes.
(6) And taking the processed membrane electrode sealing frame off the device for later use.
The assembling and heat-sealing treatment process of the proton exchange membrane comprises the following steps:
(1) and flattening the pretreated membrane electrode sealing frame on a clean protection gasket, opening the two sealing frames, and blowing clean by using air blowing and the like.
(2) Taking out the proton exchange membrane, covering the proton exchange membrane in the effective area frame, and covering the proton exchange membrane.
(3) And when the two layers of sealed frames are closed, the upper layer of frames and the lower layer of frames are not required to be aligned due to pretreatment, so that the processing efficiency and the accuracy are greatly improved.
(4) The position of the membrane electrode in the sealing frame is adjusted to be centered, and the position relationship between the proton exchange membrane and the sealing frame can be changed by slightly moving the sealing frame.
(5) Pressing the three layers into the upper and lower protective layers, and performing hot-press shaping in a hot-press system.
Example 1:
the sizes of the membrane electrode processed at this time are 190mm at the maximum length, 90mm at the maximum width and 5mm at the positioning aperture, so that the A end (as shown in figure 2) used when a larger membrane electrode is processed is selected to fully utilize the pressing platform. 5mm is selected to the replaceable fixed column, and the operation requirement of counterpoint can be realized by selecting any fixed column smaller than 5mm in theory.
A fuel cell membrane electrode production packaging process comprises the following steps:
(1) the frame is pretreated by the end A of the aligning device for processing the large membrane electrode, and the pretreated frame can be assembled without manual aligning operation again so that the upper frame and the lower frame can be aligned strictly.
(2) And flattening the pretreated membrane electrode sealing frame on a clean protection gasket, opening the two sealing frames, and blowing clean by using air blowing and the like.
(3) And taking out the proton exchange membrane which is sprayed and cut, covering the proton exchange membrane in the effective area frame, and covering the proton exchange membrane.
(4) And when the two layers of sealed frames are closed, the upper layer of frames and the lower layer of frames are not required to be aligned due to pretreatment, so that the processing efficiency and the accuracy are greatly improved.
(5) And adjusting the position of the membrane electrode in the sealing frame to center the membrane electrode. The form of the slightly moving sealing frame can be selected to change the position relationship between the proton exchange membrane and the sealing frame.
(6) Pressing the three layers into the upper and lower protective layers, and performing hot-press shaping in a hot-press system.
Example 2:
the research and development sample membrane electrode of this processing is the structure of square no alignment hole, and frame length of side is 70mm, and effective area length of side is 50mm, therefore chooses the B end (as shown in figure 3) that uses when processing less membrane electrode for use, selects the mode that square alignment post and effective area both sides coincide to align sealed frame. The square replaceable fixing column 5 is selected to be 5 mm.
A fuel cell membrane electrode production packaging process comprises the following steps:
(1) the frame is preprocessed by the B end of the aligning device for processing the small membrane electrode, and the preprocessed frame can be assembled without manual aligning operation again so that the upper frame and the lower frame can be aligned strictly.
(2) And flattening the pretreated membrane electrode sealing frame on a clean protection gasket, opening the two sealing frames, and blowing clean by using air blowing and the like.
(3) And taking out the proton exchange membrane which is sprayed and cut, covering the proton exchange membrane in the effective area frame, and covering the proton exchange membrane.
(4) And when the two layers of sealed frames are closed, the upper layer of frames and the lower layer of frames are not required to be aligned due to pretreatment, so that the processing efficiency and the accuracy are greatly improved.
(6) And adjusting the position of the membrane electrode in the sealing frame to center the membrane electrode. The form of the slightly moving sealing frame can be selected to change the position relationship between the proton exchange membrane and the sealing frame.
(7) Pressing the three layers into the upper and lower protective layers, and performing hot-press shaping in a hot-press system.
Due to the side heat transfer law, a fan-shaped transparent area is created in the heat seal material, and the distance d (see fig. 5) extending from the transparent area to the heat seal edge can be measured, by which we can evaluate the heat seal effect. It is believed that a heat seal distance d greater than 0.5mm produces a better anchoring effect. It is generally believed that the heat-seal distance d is related to the material thickness, temperature and heat-seal time, with smaller thickness, higher temperature and longer time providing better heat-seal effect. The heat sealing effect of the different materials at different temperatures was initially tested qualitatively, see fig. 6 and 7. The test result proves that the lateral hot pressing process is simple and reliable to operate, and the actual expected use effect can be achieved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A production and packaging process for a membrane electrode of a fuel cell is characterized by comprising the following steps:
(a) selecting a fixed column for the alignment device and adjusting the position of the fixed column;
(b) gradually mounting the cut frames on an alignment device in each layer in sequence, and flattening and compacting the sealed frame on one side to be thermally sealed by using an adjustable pressure plate;
(c) performing lateral heat sealing treatment by using a heat sealing system, and automatically fixing and aligning the treated sealing frame to obtain a pretreated membrane electrode sealing frame;
(d) flattening the pretreated membrane electrode sealing frames on a clean protection gasket, opening the two sealing frames, and blowing and sweeping the sealing frames clean by using air;
(e) putting a proton exchange membrane between the two layers of frames, closing the two layers of sealed frames, and finishing alignment of the sealed frames;
(f) adjusting the position of the membrane electrode in the sealing frame to center the membrane electrode, and slightly moving the sealing frame to change the position relation between the proton exchange membrane and the sealing frame;
(g) pressing the three layers into an upper protective layer and a lower protective layer, and entering a hot pressing system for hot pressing and shaping;
the alignment device comprises a fixing assembly and a sliding positioning assembly, wherein the fixing assembly comprises a base plate, slotted holes are formed in two ends of the base plate, and fixing columns are inserted into the slotted holes; the end part of the base plate is provided with a pressure plate base, and an adjustable pressure plate is arranged on the pressure plate base; the sliding positioning assembly is arranged in an undercut region of the base plate close to the slotted hole in one side and comprises a sliding positioning shaft and a sliding block, the shaft part of the sliding positioning shaft penetrates through a shaft hole in the sliding block, rolling shafts at two ends of the sliding positioning shaft slide in the undercut region of the base plate, and the sliding block is provided with a fixed column.
2. The process for producing and packaging a fuel cell membrane electrode according to claim 1, wherein in the step (c), the heat-sealing system is an electric soldering iron or a heating resistance wire.
3. The process of claim 1 wherein in step (c) said sealing frame is provided with a layer of hot melt adhesive.
4. The fuel cell membrane electrode production and packaging process according to claim 1, wherein in the step (e), the proton exchange membrane is one of a proton exchange membrane carrying a catalytic layer and a proton exchange membrane only.
5. The fuel cell membrane electrode assembly manufacturing and packaging process of claim 1, wherein in step (g), said heat press molding is line contact rolling press.
6. The process of claim 1 wherein said alignment means is provided at both the left and right ends.
7. The process of claim 1 wherein said attachment posts are replaced by different sizes depending on the part being processed.
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| CN201811194333.7A CN109390610B (en) | 2018-10-15 | 2018-10-15 | Fuel cell membrane electrode production and packaging process |
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| CN201811194333.7A CN109390610B (en) | 2018-10-15 | 2018-10-15 | Fuel cell membrane electrode production and packaging process |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110311152B (en) * | 2019-07-05 | 2020-11-20 | 深圳市南科燃料电池有限公司 | Sealing method |
| CN110318067A (en) * | 2019-07-09 | 2019-10-11 | 清华大学 | Electro catalytic electrode, preparation and the recovery method of recoverable |
| CN116387581B (en) * | 2023-05-31 | 2023-08-18 | 上海韵量新能源科技有限公司 | CCM membrane electrode assembly process and assembly equipment |
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