CN112531183A - Fuel cell membrane electrode sealing assembly, packaging process and continuous packaging equipment - Google Patents
Fuel cell membrane electrode sealing assembly, packaging process and continuous packaging equipment Download PDFInfo
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- CN112531183A CN112531183A CN202011413165.3A CN202011413165A CN112531183A CN 112531183 A CN112531183 A CN 112531183A CN 202011413165 A CN202011413165 A CN 202011413165A CN 112531183 A CN112531183 A CN 112531183A
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- membrane electrode
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
- H01M4/8657—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites layered
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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
- H01M8/0286—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
Abstract
The invention discloses a membrane electrode sealing assembly of a fuel cell, wherein the area of a diffusion layer is larger than that of a through notch of a sealing frame, and limiting through holes are formed in a catalytic electrode layer and the sealing frame, so that five-in-one primary limiting in a layer-by-layer overlapping mode is realized; the packaging process of the membrane electrode sealing assembly is also disclosed, the fixture is adopted to realize the continuous transportation of the membrane electrode sealing assembly, and the packaging process of welding is combined, so that the problems of dislocation, looseness and the like in the carrying process of the membrane electrode sealing assembly in the common hot-pressing packaging technology in the prior art are solved; the equipment for continuous packaging comprises an assembly line, a welding line and a cooling line of the membrane electrode sealing assembly, which are all completed in one step in the transmission process of a conveyor belt, so that the continuous packaging of the membrane electrode is realized, and the problem that the conventional membrane electrode sealing assembly cannot be continuously packaged is solved.
Description
Technical Field
The invention relates to the field of fuel cells, in particular to a membrane electrode sealing assembly of a fuel cell, a packaging process and continuous packaging equipment.
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.
The membrane Electrode assembly (mea) is the core component of the hydrogen fuel cell, and is formed by combining the catalytic Electrode layer of the hydrogen fuel cell and the gas diffusion layer positioned at the two sides of the catalytic Electrode layer. In the prior art, a hydrogen fuel cell membrane electrode assembly is formed by hot-pressing a catalytic electrode layer and gas diffusion layers positioned on two sides of the catalytic electrode layer, and the hot-pressing effect directly influences the yield of the membrane electrode assembly, wherein the influence of generated bubbles and wrinkles on the membrane electrode assembly is the most serious when the membrane electrode assembly is subjected to hot pressing.
At present, the membrane electrode sealing assembly is generally produced by manual processing by an operator, that is, the operator seals the cut proton exchange membrane into the sealing protection frame when assembling the membrane electrode, and generally a sandwich type sealing method is used, that is, the proton exchange membrane is sealed into two layers of sealing protection frames.
Patent CN103887519A discloses a membrane electrode pressing mold and its operation method. The mold is provided with the through holes and the grooves on the upper positioning plate and the lower positioning plate to position the gas diffusion layer and the membrane electrode, but the membrane electrode with the frame is easy to distort and deform and cannot be tiled in the grooves, so that the displacement is caused during pressing.
Patent CN106785071A provides a thermal composite process of battery cell, in which a first separator, a first electrode, a second separator, and a second electrode are stacked sequentially from bottom to top; and (4) conveying the stacked four unit layers into a hot press for hot pressing to form a hot pressing unit.
The existing hot-press molding process for producing the membrane electrode of the fuel cell has the problems of poor hot-press quality and low hot-press precision. Most of the existing hot pressing operations are one-step forming, the conditions of uneven pressure, overlarge pressure and the like easily occur, and the condition of adhesion easily occurs in the curing process of the rubber material; and the condition that the component to be hot-pressed is convenient to take and place and can not shift in the hot-pressing process cannot be guaranteed, the mode that the upper pressing plate and the lower pressing plate are pasted with the white cardboard is adopted to carry out flat hot-pressing on the membrane electrode assembly, and the complete removal of bubbles in the membrane electrode assembly and the form of the membrane electrode assembly in the flat hot-pressing process cannot be well guaranteed.
Disclosure of Invention
One of the purposes of the invention is to provide a fuel cell membrane electrode sealing assembly, which improves the structure of the membrane electrode sealing assembly, can realize the primary limit between layers of the membrane electrode sealing assembly and is convenient for the integral transportation; the invention also aims to provide a packaging process of the fuel cell membrane electrode sealing assembly, which has the characteristic of continuous packaging, has higher working efficiency and can achieve better sealing property; the invention further aims to provide equipment for continuously packaging the membrane electrode sealing assembly of the fuel cell, which can realize the integral transportation of the membrane electrode sealing assembly, and the membrane electrode sealing assembly for completing the limiting can realize the continuous transportation and the continuous packaging under the equipment.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides a fuel cell membrane electrode sealing assembly, which comprises a membrane electrode and two sealing frames, wherein the membrane electrode is composed of a catalytic electrode layer and diffusion layers respectively arranged on two side surfaces of the catalytic electrode layer, the two sealing frames are respectively arranged outside non-coating surfaces of the two diffusion layers and seal the membrane electrode, and the membrane electrode sealing assembly sequentially comprises a first sealing frame, a first diffusion layer, a catalytic electrode layer, a second diffusion layer and a second sealing frame from bottom to top;
the sealing frames are provided with through notches for exposing the non-coating surfaces of the diffusion layers, the areas of the diffusion layers are larger than the areas of the through notches, specifically, the through notches are formed in the middle positions of the first sealing frame and the second sealing frame, and the first diffusion layer, the catalytic electrode layer and the second diffusion layer are concentrically arranged with the through notches; the areas of the first diffusion layer and the second diffusion layer are larger than the area of the through notch;
the catalytic electrode layer and the sealing frame are provided with a plurality of coaxial limiting through holes with corresponding positions at positions close to the corner ends, and one surfaces of the sealing frame, which are in contact with the membrane electrode, are coated with adhesive surface layers, in particular to the catalytic electrode layer, the first sealing frame and the second sealing frame are provided with a plurality of coaxial limiting through holes with corresponding positions at positions close to the corner ends; and the surface of the first sealing frame, which is in contact with the first diffusion layer, and the surface of the second sealing frame, which is in contact with the second diffusion layer, are coated with adhesive surface layers.
The invention is further configured to: the distance between the outer edge end of the diffusion layer and the edge end of the through groove opening is 1-2 mm.
In another aspect, the present invention provides a process for packaging a fuel cell membrane electrode seal assembly, the membrane electrode seal assembly being positioned in a fixture, the fixture including a support plate and positioning posts distributed near four corner ends of the support plate, the process comprising the steps of:
s1, placing the first sealing frame in a clamp by using a limiting through hole structure, wherein the glue surface layer of the first sealing frame faces upwards, and then covering the non-coating surface of the first diffusion layer at the right middle part of the glue surface layer of the first sealing frame;
s2, placing the catalytic electrode layer in the clamp and covering the first diffusion layer coating surface by using a limiting through hole structure;
s3, covering the coating surface of the second diffusion layer at the middle of the catalytic electrode layer, and then covering the adhesive surface layer of the second sealing frame on the non-coating surface of the second diffusion layer by using the limiting through hole structure again to complete the superposition and limiting of the five layers and form a membrane electrode sealing assembly;
s4, welding the membrane electrode sealing assembly by a laser welding process, wherein a welding head welds along the 3-5mm position of the peripheral edge of the diffusion layer to form a circle of pre-welding seams;
s5, performing scanning type ultrasonic welding on the superposed position of the diffusion layer and the sealing frame in the membrane electrode sealing assembly of S4 by adopting an ultrasonic linear scanning welding process to form a first sealing area at the diffusion layer;
s6, continuing to adopt the ultrasonic linear scanning welding process to carry out secondary scanning type ultrasonic welding on the area between the first area and the second area in the membrane electrode sealing assembly which is finished with the S5, and forming a second sealing area; the first area is an area in a closed ring formed by linearly connecting the limiting through holes, and the second area is a first sealing area;
and S7, performing cold curing treatment on the membrane electrode sealing assembly subjected to S6 to complete the packaging of the membrane electrode sealing assembly.
Wherein, the one side of diffusion layer is coated with the thick liquids, is the coating face, and the coating face of diffusion layer and the coating face direct contact of catalytic electrode.
The invention is further configured to: in the S5 and S6 ultrasonic linear scanning welding process, the pressure of the welding head to the membrane electrode sealing assembly is 0.05-0.2MPa, and the vibration frequency is 15-40 kHz.
The invention is further configured to: in the S4 laser welding process, the laser power parameter is 0.1-0.3W.
The invention is further configured to: in the S4-S6 laser welding process and the ultrasonic linear scanning welding process, the welding process is carried out under the protection of nitrogen, the output flow of the nitrogen is 15-30L/min, and the pressure is 0.2-0.5 Mpa.
The invention is further configured to: in the cold solidification treatment in S7, cooling water is adopted to cool the membrane electrode sealing assembly, and the water temperature of the cooling water is 10-20 ℃.
In another aspect, the invention provides a continuous packaging device for a fuel cell membrane electrode packaging process, which comprises a frame body and a Plc system, wherein the frame body is provided with a conveying mechanism, and a membrane electrode sealing assembly superposition limiting area, a membrane electrode sealing assembly welding area and a rolling cold-solidification area acting on the membrane electrode sealing assembly are sequentially arranged along a conveying direction from a feeding end to a discharging end of the conveying mechanism;
the membrane electrode sealing assembly superposition limiting area comprises two groups of limiting mechanisms for auxiliary placement of diffusion layers for realizing accurate placement of the diffusion layers;
the membrane electrode sealing assembly welding area comprises laser welding equipment for welding the membrane electrode sealing assembly, ultrasonic linear scanning welding equipment and nitrogen input mechanisms distributed on two sides of the conveying belt in the conveying direction.
The invention is further configured to: the ultrasonic linear scanning welding equipment is characterized in that a first welding head set for welding a first sealing area and a second welding head set for welding a second sealing area are sequentially arranged in the conveying direction of the conveying belt, the first welding head set comprises a first strip-shaped welding head and square welding heads arranged at two ends of the first strip-shaped welding head, the second welding head set comprises a second strip-shaped welding head and square welding heads arranged at two ends of the second strip-shaped welding head, and the second strip-shaped welding head can slide up and down along the two square welding heads.
The invention is further configured to: a first sensor and a second sensor which identify diffusion layers so as to control the operation of a first welding head group are respectively arranged on two sides of one end of the square welding head in the thickness direction, and the linear distance from the first sensor to the long strip-shaped welding head I and the linear distance from the second sensor to the long strip-shaped welding head I are equal to the width of the first sealing area; the square welding joint II is provided with a third sensor, and the clamp is far away from the membrane electrode assembly and is provided with four receivers in an array manner along the length direction of the membrane electrode assembly, wherein the four receivers are in signal connection with the third sensor; the laser welding equipment comprises a laser welding head, the laser welding head is located at a front station of the laser welding head along the conveying direction of a conveying belt, the first sensor, the second sensor, the third sensor, the fourth sensor and the receiver form an identification sensor control assembly, and the identification sensor control assembly is in signal connection with a plc system circuit.
In conclusion, the invention has the following beneficial effects:
1. the invention discloses a membrane electrode sealing assembly, wherein the area of a diffusion layer in the membrane electrode sealing assembly is larger than that of a through notch in a sealing frame, so that a method of stacking layer by layer can be adopted, and the primary positioning of the five integral parts can be realized by matching with a rubber surface layer on the sealing frame;
2. the invention also discloses a packaging process of the membrane electrode sealing assembly, which is provided with the clamp with the positioning column, so that the problem that the membrane electrode sealing assembly cannot be accurately positioned and produced in the actual packaging production can be realized on the premise of not needing complicated procedures of sticking an adhesive tape, and the assembly time and the workload of the membrane electrode sealing assembly are saved; meanwhile, a welding packaging process is adopted, so that the membrane electrode sealing assembly with the clamp can be directly transported and packaged, and the problem that the hot-pressing packaging effect is influenced by the bad phenomena of dislocation, looseness and the like in the transporting process of the membrane electrode sealing assembly in the common hot-pressing packaging technology in the prior art is solved; meanwhile, in the process, laser welding is used for primarily fixing a welding line at a position, away from the diffusion layer, of the membrane electrode sealing assembly, and the distance from the diffusion layer to the periphery is a certain distance, and the sealing effect of the laser welding is far greater than that of heat sealing, so that the sealing effect of the electrode is greatly improved by pre-welding, the positioning effect of the membrane electrode sealing assembly on a clamp can be enhanced, the diffusion layer is prevented from shifting, then scanning type surface contact welding of ultrasonic linear scanning welding is used, the phenomenon that the performance of the membrane electrode sealing assembly is influenced by bubbles, wrinkles and the like can not occur when the membrane electrode sealing assembly is sealed, and a better;
3. in the ultrasonic linear scanning welding process of the membrane electrode sealing assembly, two groups of welding heads are adopted to separately weld the first sealing area and the second sealing area in sequence, so that the phenomenon of extrusion on a diffusion layer during one-time ultrasonic scanning is avoided, and the phenomenon of damage to the diffusion layer caused by multiple times of sealing extrusion at the superposition position of the diffusion layer and a sealing frame is also avoided;
4. the invention also discloses equipment for continuously packaging the membrane electrode sealing assembly of the fuel cell, which comprises an assembly line, a welding line and a cooling line of the membrane electrode sealing assembly, wherein the assembly line, the welding line and the cooling line are all completed in one step in the transmission process of a conveyor belt, so that the continuous packaging of the membrane electrode is realized, and the problem that the conventional membrane electrode sealing assembly cannot be continuously packaged is solved;
5. the equipment for continuous packaging adopts special welding heads for welding the first sealing area and the second sealing area of the membrane electrode sealing assembly, can realize accurate welding of the membrane electrode sealing assembly, and can realize intelligent automatic work of a welding area by combining an identification sensor control assembly.
Drawings
FIG. 1 is a schematic view of the construction of a membrane electrode seal assembly;
FIG. 2 is a schematic view showing the overall structure of the apparatus for continuous packaging;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic view of the whole structure of the continuous packaging device, which is also a schematic view of the gas outlet pipe, the grating sensor and the position sensor;
FIG. 5 is a schematic view of the connection auxiliary positioning mechanism located between two layers of conveyor belts and located in the frame body;
figure 6 is a schematic view of a membrane electrode seal assembly placed in a fixture and laser welded;
FIG. 7 is a schematic illustration of a membrane electrode seal assembly placed in a fixture for ultrasonic linear scan welding of a first sealing zone;
FIG. 8 is an enlarged partial view of the linear distance from the first sensor and the second sensor, respectively, to the first elongated weld head and the width of the first sealed area;
figure 9 is a schematic illustration of a membrane electrode seal assembly placed in a fixture for ultrasonic linear scan welding of the second sealing zone.
In the figure: 1. a membrane electrode seal assembly; 1-1, sealing the frame; 1-1-1, a through slot; 1-1-2 of a rubber surface layer; 1-2, a catalytic electrode layer; 1-2-1, a catalyst layer; 1-3, a diffusion layer; 1-4, limiting through holes; 2. a clamp; 2-1, a support plate; 2-2, a positioning column; 2-3, a receiver; 3. a frame body; 3-1, an electric lifting door; 4. a conveyor belt; 5. a limiting mechanism for auxiliary placement of the diffusion layer; 5-1, connecting plates; 5-2, positioning plates; 5-3, a half-frame through groove; 5-4, limiting gaps; 5-5, an extension wall; 5-6, cylinder two; 5-7, a position sensor; 6. rolling a cold setting area; 6-1, rotating flexible floating rolls; 6-2, a water pipe; 6-3, a cooling water tank; 7. a laser welding head; 7-1, a fourth sensor; 8. a first welding head group; 8-1, a first strip-shaped welding head; 8-2, welding a square welding head I; 8-3, a first sensor; 8-4, a second sensor; 9. a second welding head group; 9-1, welding a second strip-shaped welding head; 9-2, welding a square welding head II; 9-3, a third sensor; 10. a connection auxiliary positioning mechanism (positioned inside the conveying belt at the welding area); 10-1, an electromagnetic supporting seat; 10-2, a first motor; 10-3, a second motor; 10-4, a slide bar; 10-5, a sliding block; 10-6, a screw; 11. an air outlet long pipe; 11-1, connecting an air pipe; 12. a position adjustment mechanism; 12-1, a grating sensor; 12-2, infrared beam; 12-3, a cylinder I; 12-4, adjusting the push plate; 13. a jig storage table; 14. welding seams are preformed; 15. a first sealing area; 16. a second sealing area.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A fuel cell membrane electrode sealing assembly 1 comprises a catalytic electrode layer 1-2 formed by coating catalyst layers 1-2-1 on two sides of a proton exchange membrane, two diffusion layers 1-3 respectively arranged on the two catalyst layers 1-2-1, and a core assembly of a fuel cell, namely a membrane electrode, consisting of the catalytic electrode layer 1-2 and the two diffusion layers 1-3.
In the sealing component, two sides of a membrane electrode are respectively covered with a sealing frame 1-1 made of PEN material with high melting point and high barrier property, the right center of the sealing frame 1-1 is provided with a through notch 1-1-1 for exposing the non-coating surface of a diffusion layer 1-3, in the membrane electrode sealing component 1, the area of the through notch 1-1-1 is smaller than the area of the diffusion layer 1-3, the distance between the outer peripheral end of the diffusion layer 1-3 and the edge end of the through notch 1-1-1 is 1-2mm, in the embodiment, the distance is 1mm, so that the covering limit of the diffusion layer 1-3 can be realized when the sealing frame 1-1 is covered on the diffusion layer 1-3, and the positions of the catalytic electrode layer 1-2 and the sealing frame 1-1, which are close to four corners, are respectively provided with 4 corresponding and coaxial limiting through holes 1-4, so as to fix the position relation between the catalytic electrode layer 1-2 and the sealing frame 1-1, further fix the position relation between the layers of the membrane electrode sealing component 1, and simultaneously coat the glue surface layer 1-1-2 with the melting point of below 100 ℃ on the surface of the sealing frame 1-1 contacting with the membrane electrode, such as heat-sensitive glue and the like.
As shown in fig. 1, the membrane electrode sealing assembly 1 sequentially comprises, from bottom to top, a first sealing frame 1-1, a diffusion layer 1-3 disposed on the first sealing frame 1-1 and concentrically disposed with the through-groove 1-1-1, a catalytic electrode layer 1-2, a second diffusion layer 1-3 disposed at the center of the catalytic electrode layer 1-2, and a second sealing frame 1-1, wherein the adhesive surface layer 1-1-2 between the two sealing frames 1-1 can realize primary limit when the five sealing frames are combined into one.
The continuous packaging equipment for the membrane electrode sealing assembly of the fuel cell comprises a frame body 3 and a Plc system, wherein a timing program module is arranged in the Plc system; as shown in fig. 2 and 4, the frame body 3 is provided with a transport mechanism, and a membrane electrode seal assembly stacking limiting region, a membrane electrode seal assembly 1 welding region, a rolling cold-setting region 6 acting on the membrane electrode seal assembly 1, and a clamp storage table 13 located between the membrane electrode seal assembly 1 welding region discharge end and the rolling cold-setting region 6 are sequentially arranged along a transport direction from a feed end to a discharge end of the transport mechanism.
The membrane electrode sealing assembly superposition limiting area comprises a plurality of groups of limiting mechanisms 5 for auxiliary placement of diffusion layers for realizing accurate placement of the diffusion layers 1-3 and position adjusting mechanisms 12 for controlling the transmission area of the clamp 2, and in the embodiment, the number of the limiting mechanisms 5 for auxiliary placement of the diffusion layers is two.
The membrane electrode sealing assembly 1 welding area comprises a laser welding device for welding the membrane electrode sealing assembly 1, an ultrasonic linear scanning welding device, a connection auxiliary positioning mechanism 10 which has the function of welding a clamp 2 in transmission, and an identification sensor control assembly which identifies the position of the membrane electrode sealing assembly 1, is connected with a plc system circuit signal and further controls the laser welding device, the ultrasonic linear scanning welding device and the working time sequence of the connection auxiliary positioning mechanism 10, and a protective gas introducing mechanism is further arranged in the membrane electrode sealing assembly 1 welding area.
The specific arrangement of the mechanisms, devices and components is as follows:
the conveying mechanism mainly comprises a conveying belt 4 arranged on the frame body 3 and a driving motor for conveying the conveying belt 4, wherein the two ends of the conveying belt 4 are respectively a feeding end and a discharging end, as shown in fig. 2 or 4.
The limiting mechanism 5 for auxiliary placement of the diffusion layer is shown in fig. 2-4 and comprises a connecting plate 5-1 which is rotatably arranged on a frame body 3 and is arranged on two sides of the frame body along the conveying direction of a conveying belt 4, a cylinder II 5-6 which is hinged with the surface of the connecting plate 5-1 is arranged on the frame body 3, namely the connecting plate 5-1 is turned over under the control of the cylinder II 5-6, positioning plates 5-2 which can be abutted against a clamp 2 are arranged at the bottoms of the two connecting plates 5-1, the distance between the bottoms of the positioning plates 5-2 and the surface of the conveying belt 4 is 1.5cm, and the positioning plates 5-2 are prevented from being directly contacted with the conveying belt 4; the top of the connecting plate 5-1 is provided with a half-frame through groove 5-3, when the two connecting plates 5-1 are both parallel to the conveyor belt 4, the two half-frame through grooves 5-3 jointly form a limit notch 5-4 for the diffusion layer 1-3 to pass through, and when the diffusion layer passes through, the horizontal distance between the periphery of the inner wall of the limit notch 5-4 and the periphery of the diffusion layer 1-3 is 0.3mm, so that the diffusion layer 1-3 can pass through smoothly, meanwhile, the inner peripheral wall of the connecting plate 5-1 along the limit notch 5-4 is provided with an extension wall 5-5 extending towards the direction close to the conveyor belt 4, so as to realize the falling supporting function of the diffusion layer 1-3 passing through the limit notch 5-4, the distance between the bottom of the extension wall 5-5 and the upper end surface of the positioning column 2-2 of the clamp 2 is 1cm, the collision generated on the transmission of the clamp 2 is avoided, so that the clamp cannot be positioned right below the limiting notch 5-4; when the connecting plate 5-1 is parallel to the conveyor belt 4, the distance between the upper end surface of the connecting plate 5-1 and the upper end surface of the clamp 2 is 3cm, namely the integral falling distance of the diffusion layer 1-3 is 3cm, the smaller falling distance ensures that the diffusion layer 1-3 quickly falls on the clamp 2, and the offset phenomenon in the falling process is reduced; meanwhile, position sensors 5-7 for identifying the clamps 2 are arranged on the frame body 3 at the front stations of the connecting plates 5-1 along the conveying direction of the conveying belt 4, and the position sensors 5-7 and the air cylinders 5-6 are in signal connection with a plc system circuit.
In the process of transmitting the clamp 2, after being identified by the position sensor 5-7, an identification signal is transmitted to a plc system, the plc system provides a preset program to obtain an instruction, namely, the work of the cylinder II 5-6 adjacent to the position sensor 5-7 is realized, the two connecting plates 5-1 are overturned to be parallel to the conveyor belt 4, the clamp 2 stops continuing to advance after being abutted against the positioning plate 5-2, the sealing frame 1-1 of one of the membrane electrode sealing assemblies 1 loaded on the clamp is positioned at the position concentric with the limiting notch 5-4, a worker can drop the diffusion layer 1-3 from the limiting notch 5-4, so that the diffusion layer 1-3 smoothly covers the sealing frame 1-1 in a short time, after the plc system program instructs 5S, the cylinder II 5-6 drives the connecting plate 5-1 to overturn to be far away from the conveyor belt 4, the grippers 2 continue to be conveyed forward by the conveyor belt 4.
A position adjusting mechanism 12, as shown in fig. 2 and 4, the position adjusting mechanism 12 comprises two parallel infrared beams 12-2 which are arranged on the surface of the conveyor belt 4, are positioned between the feeding end of the conveyor belt 4 and the welding area of the membrane electrode sealing assembly 1 and are emitted by a grating sensor 12-1, and a limiting area acting on the clamp 2 is formed between the two infrared beams 12-2; the frame body 3 is provided with adjusting push plates 12-4 which are driven by cylinders I12-3, are parallel to the infrared beams 12-2 and push the clamps 2 at the two sides of the feeding end of the conveyor belt 4; the first cylinder 12-3 and the grating sensor 12-1 are in signal connection with a plc system circuit.
The worker places the clamp 2 in a limit area between the infrared light beams 12-2 as much as possible through the two parallel infrared light beams 12-2, if the clamp 2 is not in the limit area during initial transmission, the clamp coincides with the infrared light beams 12-2, at the moment, the grating sensor 12-1 transmits a signal to the plc system, the plc system controls the cylinder I12-3 to work through a program instruction, the telescopic motion of the push plate 12-4 is adjusted, the telescopic process of the push plate 12-4 is adjusted to be abutted against the clamp 2, and the cylinder I12-3 stops working until the clamp 2 is completely pushed into the limit area; thereby ensuring that the clamp 2 is strictly positioned in the limit area at the feeding end and keeps continuously conveying in the limit area; meanwhile, an alarm connected with a circuit signal of the grating sensor 12-1 can be connected into the plc system, and when the deviation limiting area coincides with the infrared beam 12-2 in the continuous transmission process of the clamp 2, the alarm gives an alarm, so that a worker can correct the deviation limiting area in time.
As shown in fig. 4 and 6, the laser welding device, which is commercially available for plastic laser welding and can achieve micro-power adjustment, mainly includes a laser welding head 7 and a driving table (not shown) for controlling the laser welding head 7 to move in the X/Y/Z axis direction, and meanwhile, along the conveying direction of the conveyor belt 4, a fourth sensor 7-1 connected with a plc system circuit signal is arranged at a position in front of the laser welding head 7 on the laser welding device for sensing a diffusion layer 1-3 exposed outside in the membrane electrode sealing assembly 1, and a sensing means of the diffusion layer 1-3 can be adjusted by a distance between the fourth sensor 7-1 and the diffusion layer 1-3 to obtain a distance value range, which is input into a plc program; after the fixture 2 is conveyed into the welding zone of the membrane electrode sealing assembly 1, the fourth sensor 7-1 senses the diffusion layer 1-3, the plc system instructs the laser welding head 7 to form a circle of pre-welded seam 14 within a size range set by the distance from the outer peripheral end of the diffusion layer 1-3 in the membrane electrode sealing assembly 1 according to a program path, in the embodiment, the welding power of the laser welding head 7 is set to be 0.1W, and the welding temperature can reach 300 ℃.
An ultrasonic linear scanning welding device, as shown in fig. 4, 7 and 8, in the present invention, the ultrasonic linear scanning welding device mainly includes two sets of welding heads for welding the membrane electrode assembly 1, a first welding head set 8 and a second welding head set 9 customized for the size of the membrane electrode assembly 1 to achieve complete welding of the first sealing area and the second sealing area, the first welding head set 8 includes a first strip-shaped welding head 8-1 and a first square-shaped welding head 8-2 disposed at two ends of the first strip-shaped welding head 8-1, the second welding head set 9 includes a second strip-shaped welding head 9-1 and a second square-shaped welding head 9-2 disposed at two ends of the second strip-shaped welding head 9-1, an X-Y-Z driving stage for controlling the first welding head set 8 and the second welding head set 9 to move in X/Y/Z directions respectively is also disposed in the ultrasonic linear scanning welding device, meanwhile, the strip welding head I8-1 can be additionally provided with a small X-Y-Z driving table to enable the strip welding head I to do independent up-and-down sliding motion along the two square welding heads I8-2, and similarly, the strip welding head II 9-1 can also do up-and-down sliding motion along the two square welding heads II 9-2; in this embodiment, the surface of the welding head contacting the membrane electrode seal assembly to be welded may be configured as an arc surface, so that the surface contacts the membrane electrode seal assembly to be welded in a line-to-surface manner, thereby reducing the relative friction between the membrane electrode seal assembly and the membrane electrode seal assembly while ensuring smooth ultrasonic welding of the membrane electrode seal assembly.
Meanwhile, the two sides of the long strip-shaped welding head 8-1 along the thickness are respectively provided with a first sensor 8-3 and a second sensor 8-4 which identify the diffusion layer 1-3 so as to control the operation of the welding head group I8, the distances between the first sensor 8-3 and the second sensor 8-4 can be adjusted, before the long strip-shaped welding head 8-1 and the long strip-shaped welding head 8-4 are used, the distance between the first sensor 8-3 and the long strip-shaped welding head 8-1 needs to be added, the distance between the second sensor 8-4 and the long strip-shaped welding head 8-1 is equal to the width of the first sealing area 15, and as shown in figure 8, the distance between 15L and 8-3L as well as 8-4L is equal; a third sensor 9-3 is arranged on the second square welding head 9-2, and four receivers 2-3 in signal connection with the third sensor 9-3 are arranged at the lateral edges of the upper surface of the support plate 2-1 in the length direction, far away from the membrane electrode assembly and in an array along the length direction of the support plate, as shown in fig. 9; the first sensor 8-3 and the second sensor 8-4 can both adopt distance sensors, and the distance between a diffusion layer in a membrane electrode of a multilayer structure and a signal receiver in the sensor is determined through debugging before the device is used, so that the coming and leaving signals of the diffusion layer are obtained.
The first sensor 8-3, the second sensor 8-4, the third sensor 9-3, the fourth sensor 7-1 and the receiver 2-3 in the laser welding equipment form an identification sensor control component, and the identification sensor control component is in signal connection with a circuit of the plc system and controls welding movement through program writing in the plc system.
In the welding process of the membrane electrode sealing assembly 1 by ultrasonic linear scanning welding equipment, the pressure of a welding head to the membrane electrode sealing assembly 1 is controlled to be 0.1MPa, the vibration frequency is 25kHz, and the temperature is about 200 ℃, so that the adhesive surface layer 1-1-2 in the sealing frame 1-1 is melted, and the membrane electrode sealing assembly 1 is packaged under the action of the pressure.
The auxiliary connecting positioning mechanism 10 is arranged in the conveyor belt and is positioned at the welding area of the membrane electrode seal assembly (the conveyor belt 4 comprises a transmission loop consisting of an upper layer conveyor belt and a lower layer conveyor belt, the auxiliary connecting positioning mechanism is positioned between the upper layer conveyor belt and the lower layer conveyor belt at the welding area of the membrane electrode seal assembly 1), as shown in figure 5, the auxiliary connecting positioning mechanism 10 comprises two mutually parallel slide bars 10-4 which are respectively controlled to rotate by two motors I10-2, slide blocks 10-5 are connected on the slide bars 10-4 in a sliding manner, one ends of the slide blocks 10-5 far away from the slide bars 10-4 are respectively and fixedly connected with electromagnetic supporting seats 10-1 which are adsorbed on the clamp 2, the two electromagnetic supporting seats 10-1 are oppositely arranged and positioned in the same height horizontal plane, and the two electromagnetic supporting seats 10-1 are respectively in threaded connection with two screws 10-6 which, the two screws 10-6 are respectively controlled by the two motors II 10-3 to rotate, and meanwhile, the two motors II 10-3 are respectively fixedly connected with the motors I10-2; namely, the motor I10-2 can control the integral rotation of the sliding rod 10-4, the sliding block 10-5, the electromagnetic supporting seat 10-1 and the motor II 10-3, and the motor II 10-3 controls the linear sliding motion of the electromagnetic supporting seat 10-1 along the screw rod 10-6; in this embodiment, two electromagnetic supporting seats 10-1 are provided, and pressure sensors (not shown in the figure) connected with the plc system circuit are respectively provided in the electromagnetic supporting seats 10-1, and the first motor 10-2 and the second motor 10-3 are also connected with the plc system circuit, and the orientation and the working state of the electromagnetic supporting seats 10-1 are controlled according to a program; when the equipment is just started, one electromagnetic supporting seat 10-1 is in a horizontal state with the conveyor belt 4 to wait for the arrival of the clamp 2, and the other electromagnetic supporting seats 10-1 are in a vertical state with the conveyor belt 4, so that the electromagnetic supporting seat 10-1 in the horizontal state can smoothly move synchronously along the conveying direction of the conveyor belt 4 after being adsorbed by the clamp 2; because two or more electromagnetic supporting seats 10-1 are all positioned at the same horizontal height position and are arranged in a staggered mode, the one-to-one corresponding positioning and conveying work that one electromagnetic supporting seat 10-1 adsorbs one clamp 2 is achieved.
The shielding gas introducing mechanism mainly comprises gas outlet long pipes 11 which are arranged in the welding area of the membrane electrode sealing assembly 1 and located on two sides of the conveying direction of the conveying belt 4, a plurality of gas outlet holes are formed in the gas outlet long pipes 11 in an array mode along the length direction of the gas outlet long pipes, and the gas outlet long pipes 11 penetrate through the frame body 3 through gas pipe sealing and are connected with the nitrogen cylinder.
The rolling cold-setting zone 6, as shown in fig. 2 or 4, includes a pair of rotary flexible floating rollers 6-1 rotatably disposed on the frame body 3 and communicating with the conveyor belt 4 for conveying and penetrating the membrane electrode sealing assembly 1, the rotary flexible floating rollers 6-1 can be made of rubber or other materials, meanwhile, a driving member such as a hydraulic cylinder, a driving motor or the like is disposed inside the frame body for controlling the lifting or rotation of the two rotary flexible floating rollers, so as to convey the membrane electrode sealing assembly between the two rotary flexible floating rollers 6-1, and simultaneously, the rotary flexible floating rollers 6-1 are respectively tangent to the upper surface and the lower surface of the membrane electrode sealing assembly 1, the rotary flexible floating rollers 6-1 are circularly connected with the cooling water tank 6-3 through water pipes 6-2, that is, the membrane electrode assembly after welding can be placed on the conveyor belt 4 of the rolling cold-setting zone 6, and then the membrane electrode assembly is conveyed between the two rotary flexible floating rollers 6-1 through the conveying belt 4, and the membrane electrode assembly 1 is cooled in the rolling and conveying processes of the two rotary flexible floating rollers 6-1, so that the packaging effect is enhanced.
The fixture storage table 13 is arranged between the rolling cold-setting area 6 and the discharge end of the welding area of the membrane electrode sealing assembly 1, and is internally provided with a water storage cavity which is communicated with a cooling water tank 6-3 through a water pipe 6-2 to realize the recycling of cooling water in the water storage cavity, so that the fixture 2 arranged on the fixture storage table 13 can be conveniently cooled by water for the next use, and the temperature of the cooling water in the cooling water tank 6-3 is 15 ℃.
In this embodiment, the frame body 3 is provided with an electric lifting door 3-1 for closing the welding area of the membrane electrode seal assembly 1 at both the feed end and the discharge end of the welding area of the membrane electrode seal assembly 1, as shown in fig. 2, so as to be closed in the welding process and play a certain protection role; meanwhile, sound insulation cotton (not shown in the figure) is arranged in the frame body 3 close to the welding area of the membrane electrode sealing assembly 1 and the electric lifting door 3-1, so that noise pollution is caused to a working area.
A process for sealing a membrane electrode assembly 1 using the apparatus for continuous sealing in this embodiment, which uses a custom jig 2, as shown in fig. 6, the jig 2 includes a support plate 2-1 and positioning posts 2-2 disposed near four corners of the support plate 2-1, and the process for sealing the membrane electrode assembly 1 in this embodiment includes the following steps:
s1, placing the clamp 2 at the feeding end of the conveyor belt 4 for conveying, wherein under the action of the position adjusting mechanism 12, the clamp 2 can be pushed into a limit area formed by the two infrared light beams 12-2 to keep conveying.
S2, in the conveying process, the worker respectively penetrates the four limiting through holes 1-4 of the first sealed frame 1-1 through the positioning columns 2-2 of the clamp 2 by using the limiting through hole 1-4 structures to realize the positioning of the first sealed frame 1-1 in the clamp 2, and at the moment, the glue surface layer 1-1-2 of the first sealed frame 1-1 faces upwards.
S3, when the first position sensor 5-7 on the frame body 3 along the conveying direction of the conveyor belt 4 senses the clamp 2, the plc system controls the operation of the second air cylinder 5-6 in the first group of limiting mechanism 5 for auxiliary placement of the diffusion layer, so that the two connecting plates 5-1 are both turned over to be parallel to the conveyor belt 4, the positioning plate 5-2 is perpendicular to the conveyor belt 4 at the moment, when the clamp 2 is conveyed to abut against the positioning plate 5-2, the clamp 2 cannot move forward continuously along with the conveying of the conveyor belt 4, at the moment, a worker horizontally drops the diffusion layer 1-3 from a limiting notch 5-4 formed by the half-frame through grooves 5-3 of the two connecting plates 5-1, the diffusion layer 1-3 vertically drops at the central position of the first sealing frame 1-1 (an error of 0.3-0.5mm is allowed at the central position), and at the moment, the coating surface of the first diffusion layer 1-3 faces upwards; and controlling a timing program in the plc system to enable the second air cylinder 5-6 to drive the connecting plate 5-1 to turn over to be far away from the conveyor belt 4 after the clamp 2 is abutted against the positioning plate 5-2 for 5 seconds, so that the clamp 2 is continuously conveyed.
S4, for the clamp 2 which is continuously conveyed after S3 is completed, the worker uses the structure of the limiting through holes 1-4 again to enable the four limiting through holes 1-4 of the catalytic electrode layer 1-2 to respectively penetrate through the positioning columns 2-2 of the clamp 2, so that the catalytic electrode layer 1-2 is positioned in the clamp 2, and at the moment, the catalyst layer 1-2-1 in the catalytic electrode layer 1-2 is also positioned in the middle of the diffusion layer 1-3.
And S5, finishing the continuous conveying of the clamp 2 of S4, when the clamp meets the position sensor 5-7 again, controlling the second air cylinder 5-6 in the limiting mechanism 5 for auxiliary placement of the second group of diffusion layers to work by the plc system, repeating the action of S3, placing the second diffusion layer 1-3 at the central position of the catalytic electrode, withdrawing the connecting plate 5-1, and continuously conveying the clamp 2.
And S6, repeating S1 after S5, covering the adhesive surface layer 1-1-2 of the second sealing frame 1-1 on the non-coating surface of the second diffusion layer 1-3, and finishing the superposition and limiting of the five layers to form the membrane electrode sealing assembly 1.
And S7, after S6 is completed, the clamp 2 enters a welding area of the membrane electrode sealing assembly 1 under the continuous transmission of the conveyor belt 4, the electromagnetic support seat 10-1 in the welding area of the membrane electrode sealing assembly 1 realizes the electromagnetic adsorption on the clamp 2 after receiving the pressure from the clamp 2, and then slides along with the transmission of the clamp 2 to form the support and local limit of the clamp 2.
S8, in the process of continuing transmission of S7, when the fourth sensor 7-1 on the laser welding head 7 senses the diffusion layer 1-3, the laser welding equipment realizes laser welding of the membrane electrode sealing assembly 1, the laser welding head 7 rapidly winds the outer periphery of the diffusion layer 1-3 for 3mm in a circle under a preset program, namely a circle of pre-welding seams 14 are formed, and the welding power of the laser welding head 7 is 0.1W; meanwhile, the electric lifting doors 3-1 at the feed end and the discharge end of the membrane electrode seal assembly 1 in the welding area are both closed by descending, and the gas outlet long pipe 11 communicated with the nitrogen cylinder continuously supplies shielding gas into the welding area of the membrane electrode seal assembly 1, wherein the nitrogen output flow is controlled to be 20L/min, and the pressure is 0.3Mpa, as shown in FIG. 6.
S9, completing the movement of the laser welding head 7 of S8 to the original position for waiting, the clamp 2 is continuously transmitted, when the first sensor 8-3 in the welding head group I8 in the ultrasonic linear scanning welding equipment senses the diffusion layer 1-3 exposed outside the membrane electrode sealing assembly 1, the PLC system receives a signal sent by the first sensor 8-3 and then triggers the next program instruction action, namely the PLC system controls the welding head group I8 to descend to start the contact welding in the first sealing area 15 of the membrane electrode sealing assembly 1, when the first sensor 8-3 and the second sensor 8-4 in the PLC system disappear, the first sensor 8-3 and the second sensor 8-4 show that the diffusion layer 1-3 is not sensed, and at the moment, the program in the PLC system instructs the welding head group I8 to finish the welding of the membrane electrode sealing assembly 1, and the horn stack is raised away from the mea as shown in figure 7.
S10, the transmission of the clamp 2 of S9 is completed, when the third sensor 9-3 in the welding head set two 9 in the ultrasonic linear scanning welding equipment receives the first receiver 2-3 on the clamp 2, the welding head set two 9 starts to weld the membrane electrode seal electrode in a scanning mode, when the second receiver 2-3 is received, the strip welding head two 9-1 rises away from the membrane electrode seal assembly 1, the two square welding heads two 9-2 continue to weld the membrane electrode seal assembly 1, when the signal of the third receiver 2-3 is received, the strip welding head two 9-1 descends again to weld the membrane electrode seal assembly 1, when the signal of the fourth receiver 2-3 is received, the welding head set two 9 finishes the welding of the membrane electrode seal assembly 1 completely, and at the moment, the ultrasonic scanning welding of the second sealing area 16 of the membrane electrode seal assembly 1 is finished, as shown in fig. 9, at the same time, the electromagnetic supporting seat 10-1 cancels the adsorption of the clamp 2, rotates 90 degrees under the control of the motor one 10-2, and reversely transmits to the feed end of the welding area of the membrane electrode sealing assembly 1 to wait, and simultaneously, the electric lifting door 3-1 at the discharge end of the welding area of the membrane electrode sealing assembly 1 is opened, as shown in fig. 2.
In the ultrasonic linear scanning welding, the pressure of the welding head to the membrane electrode seal assembly 1 was 0.05 MPa.
S11, the clamp 2 drives the welded membrane electrode sealing assembly 1 to fall on the clamp storage table 13, the worker takes the membrane electrode sealing assembly 1 off the clamp 2 and places the membrane electrode sealing assembly on the conveying belt 4 of the rolling and cold-curing area 6, the membrane electrode sealing assembly 1 is conveyed to two rotary flexible floating rollers 6-1, cooling and curing of the rotary flexible floating rollers 6-1 are achieved in the rolling and conveying process of the rotary flexible floating rollers 6-1, the sealing effect is enhanced, and meanwhile the clamp 2 on the clamp storage table 13 is cooled under the action of circulating cooling water of the cooling water tank 6-3 to wait for reuse.
S12, the membrane electrode seal assembly 1 of S10 is collected.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A membrane electrode sealing assembly of a fuel cell is provided with a first sealing frame (1-1), a first diffusion layer (1-3), a catalytic electrode layer (1-2), a second diffusion layer (1-3) and a second sealing frame (1-1) from bottom to top in sequence; the method is characterized in that:
the middle positions of the first sealing frame (1-1) and the second sealing frame (1-1) are respectively provided with a through notch (1-1-1), and the first diffusion layer (1-3), the catalytic electrode layer (1-2) and the second diffusion layer (1-3) are concentrically arranged with the through notches (1-1-1);
the areas of the first diffusion layer (1-3) and the second diffusion layer (1-3) are larger than the area of the through groove opening (1-1-1), one surface, which is on the first sealed frame (1-1) and is in contact with the first diffusion layer (1-3), and one surface, which is on the second sealed frame (1-1) and is in contact with the second diffusion layer (1-3), are coated with a glue surface layer (1-1-2);
and a plurality of coaxial limiting through holes (1-4) which correspond to each other in position are formed in the positions, close to the corner ends, of the catalytic electrode layer (1-2), the first sealing frame (1-1) and the second sealing frame (1-1).
2. A fuel cell membrane electrode seal assembly according to claim 1 wherein: the distance between the outer edge end of the diffusion layer (1-3) and the edge end of the through notch (1-1-1) is 1-2 mm.
3. A process for packaging a fuel cell membrane electrode seal assembly according to any one of claims 1 to 2, wherein: the membrane electrode seal assembly (1) is positioned in a fixture (2), the fixture (2) comprising a support plate (2-1) and positioning posts (2-2) distributed near four corner ends of the support plate (2-1), the process comprising the steps of:
s1, placing a first sealing frame (1-1) in a clamp (2) by using a limiting through hole (1-4) structure, wherein a glue surface layer (1-1-2) of the first sealing frame (1-1) faces upwards, and then covering a non-coating surface of a first diffusion layer (1-3) in the middle of the glue surface layer (1-1-2) of the first sealing frame (1-1);
s2, placing the catalytic electrode layer (1-2) in the clamp (2) and covering the first diffusion layer (1-3) coating surface by using a limiting through hole (1-4) structure;
s3, covering the coating surface of the second diffusion layer (1-3) at the middle of the catalytic electrode layer (1-2), and then covering the adhesive surface layer (1-1-2) of the second sealing frame (1-1) on the non-coating surface of the second diffusion layer (1-3) by using the structure of the limiting through hole (1-4) again to complete the superposition and limiting of the five layers and form the membrane electrode sealing assembly (1);
s4, welding the membrane electrode sealing assembly (1) by adopting a laser welding process, and welding a welding head along the 3-5mm position of the peripheral edge of the diffusion layer (1-3) to form a circle of pre-welding seams (14);
s5, scanning ultrasonic welding is carried out on the superposed position of the diffusion layer (1-3) and the sealing frame (1-1) in the membrane electrode sealing assembly (1) with the finished S4 by adopting an ultrasonic linear scanning welding process to form a first sealing area (15) at the diffusion layer (1-3);
s6, continuing to adopt the ultrasonic linear scanning welding process to carry out secondary scanning type ultrasonic welding on the area between the first area and the second area to form a second sealing area (16); the first area is an area in a closed ring formed by linearly connecting the limiting through holes (1-4), and the second area is a first sealing area (15);
and S7, performing cold curing treatment on the membrane electrode sealing assembly (1) subjected to the S6 to complete the packaging of the membrane electrode sealing assembly (1).
4. A process for packaging a fuel cell membrane electrode seal assembly according to claim 3 wherein: in the ultrasonic linear scanning welding process of S5 and S6, the pressure of the welding head to the membrane electrode sealing component (1) is 0.05-0.2Mpa, and the vibration frequency is 15-40 kHz.
5. A process for packaging a fuel cell membrane electrode seal assembly according to claim 3 wherein: in the S4 laser welding process, the laser power parameter is 0.1-0.3W.
6. A process for packaging a fuel cell membrane electrode seal assembly according to claim 3 wherein: in the S4-S6 laser welding process and the ultrasonic linear scanning welding process, the welding process is carried out under the protection of nitrogen, the output flow of the nitrogen is 15-30L/min, and the pressure is 0.2-0.5 Mpa.
7. A process for packaging a fuel cell membrane electrode seal assembly according to claim 3 wherein: in the cold solidification treatment in S7, cooling water is adopted to cool the membrane electrode sealing assembly (1), and the water temperature of the cooling water is 10-20 ℃.
8. An apparatus for continuous packaging for carrying out a membrane electrode assembly process for a fuel cell according to any one of claims 3 to 7, comprising a housing body (3) and a Plc system, characterized in that: the frame body (3) is provided with a conveying mechanism, and a membrane electrode sealing assembly superposition limiting area, a membrane electrode sealing assembly welding area and a rolling cold-setting area (6) acting on the membrane electrode sealing assembly (1) are sequentially arranged along the conveying direction from the feeding end to the discharging end of the conveying mechanism;
the membrane electrode sealing assembly superposition limiting area comprises a limiting mechanism (5) for auxiliary placement of the diffusion layer, which realizes accurate placement of the diffusion layer (1-3);
the membrane electrode sealing assembly welding area comprises laser welding equipment for welding the membrane electrode sealing assembly (1), ultrasonic linear scanning welding equipment and nitrogen input mechanisms distributed on two sides of the conveying direction of the conveying belt (4).
9. The continuous packaging device of claim 8, wherein: the ultrasonic linear scanning welding equipment is sequentially provided with a first welding head set (8) welded to a first sealing area (15) and a second welding head set (9) welded to a second sealing area (16) along the conveying direction of the conveying belt (4), the first welding head set (8) comprises a first strip-shaped welding head (8-1) and square welding heads (8-2) arranged at two ends of the first strip-shaped welding head (8-1), the second welding head set (9) comprises a second strip-shaped welding head (9-1) and second square welding heads (9-2) arranged at two ends of the second strip-shaped welding head (9-1), and the second strip-shaped welding head can slide up and down along the two corresponding square welding heads.
10. The continuous packaging device of claim 9, wherein: a first sensor (8-3) and a second sensor (8-4) are respectively arranged on two sides of one end (8-1) of the long strip-shaped welding head I along the thickness direction, and the linear distance from the first sensor (8-3) to the long strip-shaped welding head I (8-1) and the linear distance from the second sensor (8-4) to the long strip-shaped welding head I (8-1) are equal to the width of the first sealing area (15);
a third sensor (9-3) is arranged on the second square welding head (9-2), and four receivers (2-3) in signal connection with the third sensor (9-3) are arranged on the clamp (2) in an array manner along the length direction;
the laser welding equipment comprises a laser welding head (7), wherein a fourth sensor (7-1) is arranged on the laser welding head (7) and is positioned at a front station of the laser welding head (7) along the conveying direction of the conveying belt (4);
the first sensor (8-3), the second sensor (8-4), the third sensor (9-3), the fourth sensor (7-1) and the receiver (2-3) form an identification sensor control component, and the identification sensor control component is in signal connection with a plc system circuit.
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| CN202011413165.3A CN112531183B (en) | 2020-12-03 | 2020-12-03 | Fuel cell membrane electrode sealing assembly, packaging process and continuous packaging equipment |
| PCT/CN2021/133543 WO2022116912A1 (en) | 2020-12-03 | 2021-11-26 | Fuel cell membrane electrode sealing assembly, encapsulation process, and device for continuous encapsulation |
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| CN202011413165.3A CN112531183B (en) | 2020-12-03 | 2020-12-03 | Fuel cell membrane electrode sealing assembly, packaging process and continuous packaging equipment |
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| WO2022116912A1 (en) * | 2020-12-03 | 2022-06-09 | 中国科学院大连化学物理研究所 | Fuel cell membrane electrode sealing assembly, encapsulation process, and device for continuous encapsulation |
| CN116387581A (en) * | 2023-05-31 | 2023-07-04 | 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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- 2020-12-03 CN CN202011413165.3A patent/CN112531183B/en active Active
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2021
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| WO2022116912A1 (en) * | 2020-12-03 | 2022-06-09 | 中国科学院大连化学物理研究所 | Fuel cell membrane electrode sealing assembly, encapsulation process, and device for continuous encapsulation |
| CN116387581A (en) * | 2023-05-31 | 2023-07-04 | 上海韵量新能源科技有限公司 | CCM membrane electrode assembly process and assembly equipment |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112531183B (en) | 2022-02-11 |
| WO2022116912A1 (en) | 2022-06-09 |
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