CN117374342A - Fuel cell membrane electrode manufacturing process - Google Patents
Fuel cell membrane electrode manufacturing process Download PDFInfo
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- CN117374342A CN117374342A CN202311473499.3A CN202311473499A CN117374342A CN 117374342 A CN117374342 A CN 117374342A CN 202311473499 A CN202311473499 A CN 202311473499A CN 117374342 A CN117374342 A CN 117374342A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 210000000170 cell membrane Anatomy 0.000 title claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 121
- 238000007789 sealing Methods 0.000 claims abstract description 107
- 238000000034 method Methods 0.000 claims abstract description 65
- 230000008569 process Effects 0.000 claims abstract description 59
- 238000003475 lamination Methods 0.000 claims abstract description 20
- 238000007711 solidification Methods 0.000 claims abstract description 11
- 230000008023 solidification Effects 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims description 90
- 239000010410 layer Substances 0.000 claims description 85
- 238000005520 cutting process Methods 0.000 claims description 69
- 239000000463 material Substances 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 37
- 239000002699 waste material Substances 0.000 claims description 35
- 239000012790 adhesive layer Substances 0.000 claims description 15
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 210000004027 cell Anatomy 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000306 component Substances 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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]
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a manufacturing process of a fuel cell membrane electrode, which comprises the following steps: determining a first sealing curing area and a second sealing curing area of the membrane electrode; positioning the first sealing and curing zone to a first boss zone of the curing mold, and positioning the second sealing and curing zone to a second boss zone of the curing mold; adopting a curing mold to support the membrane electrode, and adopting a curing process to process the first sealing curing area and the second sealing curing area; the laminated structure of the first sealing solidification area at least comprises a first frame layer and a second frame layer; the lamination structure of the second sealing solidification area at least comprises a first frame layer and a proton exchange membrane; the processing of the first sealing solidification area comprises the steps of enabling the first frame layer and the second frame layer to be attached; the first boss area is used for compensating for a first height difference generated in the stacking direction due to the lack of the proton exchange membrane when the first sealing curing area is cured; the second boss region is used to compensate for a second height difference in the lamination direction due to the lack of the second frame layer when curing the second seal curing region.
Description
Technical Field
The embodiment of the invention relates to a fuel cell technology, in particular to a manufacturing process of a fuel cell membrane electrode.
Background
Proton exchange membrane fuel cells (abbreviated as PEMFC in english) are a type of fuel cell that converts a gibbs free energy portion of chemical energy of fuel into electric energy through an electrochemical reaction without being limited by the carnot effect, and thus have high energy conversion efficiency. The PEMFC uses hydrogen and oxygen as raw materials, and the product is water, so that the PEMFC has the advantage of zero pollution. And the PEMFC also has the advantages of low working temperature, high starting speed and the like, and has very wide application prospect in novel energy automobiles from the aspects of energy conservation, ecological protection and the like. The core component of the PEMFC mainly comprises a membrane electrode and a bipolar plate, wherein the membrane electrode is composed of a proton exchange membrane, a catalytic layer, a frame, a gas diffusion layer and other components. The membrane electrode frame is a polymeric frame that seals the membrane electrode for providing mechanical support for the membrane electrode, separating fuel from air in the anode and cathode spaces, providing electrical insulation, and providing a sealing surface for sealing the unit cells.
In the prior art, the large-scale standardized fuel cell membrane electrode sealing process is designed for a double-frame symmetrical sealing structure, and the sealing dies are also of symmetrical structures because of the symmetrical side frames at the two sides, so that adverse effects on CCM (proton exchange membrane) caused by the stress asymmetry of the side frames of the membrane electrode of the double-frame asymmetrical sealing structure are not considered.
Disclosure of Invention
The invention provides a manufacturing process of a fuel cell membrane electrode, which aims to solve at least one defect in the prior art.
The embodiment of the invention provides a manufacturing process of a fuel cell membrane electrode, which comprises the following steps:
determining a first sealing curing area and a second sealing curing area of the membrane electrode;
positioning the first sealing and curing zone to a first boss zone of a curing mold, and positioning the second sealing and curing zone to a second boss zone of the curing mold;
adopting the curing mold to support the membrane electrode, and adopting a curing process to process the first sealing curing area and the second sealing curing area;
the laminated structure of the first sealing solidification area at least comprises a first frame layer and a second frame layer;
the laminated structure of the second sealing solidification zone at least comprises the first frame layer and a proton exchange membrane, and the proton exchange membrane comprises a catalytic layer;
the processing of the first sealing solidification area comprises the steps of enabling the first frame layer and the second frame layer to be attached;
the first boss region is used for compensating for a first height difference generated in the stacking direction due to the lack of the proton exchange membrane when the first sealing curing region is cured;
the second boss region is used for compensating for a second height difference generated in the lamination direction due to the lack of the second frame layer when the second sealing curing region is cured.
Optionally, fabricating the first frame layer includes:
the adhesive layer of the supporting film is arranged opposite to the protective film, and the supporting film is attached to the protective film through a first process;
arranging a protective film cutting die opposite to the protective film, and cutting the protective film by adopting the protective film cutting die to form a first effective area of the protective film;
removing the waste film of the protective film to leave the first effective area on the support film;
setting a frame substrate opposite to a frame active area cutting die, and cutting a frame by adopting the frame active area cutting die to form a second effective area of the frame, wherein the frame comprises the frame substrate;
setting the frame base material opposite to the support film, and attaching the support film to the frame base material through the first process;
removing the back film of the frame and the waste film of the frame, so that the second effective area is left on the supporting film;
the first active region and the second active region are located on the same side of the support film.
Optionally, fabricating the second frame layer includes:
the adhesive layer of the supporting film is arranged opposite to the protective film, and the supporting film is attached to the protective film through a first process;
arranging a protective film cutting die opposite to the protective film, and cutting the protective film by adopting the protective film cutting die to form a third effective area of the protective film;
removing the waste film of the protective film to leave the third effective area on the support film;
setting a frame substrate opposite to a frame active area cutting die, and cutting the frame by adopting the frame active area cutting die to form a fourth effective area of the frame, wherein the frame comprises the frame substrate;
setting the frame base material opposite to the support film, and attaching the support film to the frame base material through the first process;
removing the back film of the frame and the waste film of the frame, so that the fourth effective area is left on the supporting film;
the third effective region and the fourth effective region are located on the same side of the support film.
Optionally, the setting the first frame layer and the proton exchange membrane are attached, including:
arranging a proton exchange membrane cutter opposite to the proton exchange membrane, and cutting the proton exchange membrane by adopting the proton exchange membrane cutter to form a fifth effective area;
attaching the first frame layer to the fifth effective area by adopting the first process, and removing the waste film of the proton exchange film;
the fifth effective region is located on the same side of the support film as the first effective region.
Optionally, the peel strength between the adhesive layer of the support film and the frame base material is set to be 0.2-1N/cm.
Optionally, the elastic modulus of the support film is 2000-3000 Mpa.
Optionally, the cutting size of the first effective area is larger than the cutting size of the fifth effective area;
wherein the boundary of the first effective area is expanded in parallel by 0.5-5 mm outwards compared with the boundary of the fifth effective area.
Optionally, the inner side cutting size of the second effective area is smaller than the inner side cutting size of the fourth effective area;
wherein the inner boundary of the second effective area is expanded inward in parallel by 0.5-5 mm compared with the inner boundary of the fourth effective area.
Optionally, the cut depth of the protective film is the same as the thickness of the protective film.
Optionally, the cut depth of the frame is the same as the thickness of the frame.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a membrane electrode manufacturing process, wherein the manufacturing process comprises the steps of determining a first sealing curing area and a second sealing curing area of a membrane electrode; positioning the first sealing and curing zone to a first boss zone of the curing mold, and positioning the second sealing and curing zone to a second boss zone of the curing mold; the method is characterized in that a curing mold is used for supporting the membrane electrode, a curing process is used for processing a first sealing curing area and a second sealing curing area, wherein the first sealing curing area and the second sealing curing area are of asymmetric structures, based on the method provided by the embodiment, the membrane electrode with an asymmetric double-side frame structure can be effectively processed, the membrane electrode with the asymmetric double-side frame structure can be continuously sealed, the double-side frame asymmetric sealing structure has high mechanical stability and chemical durability, meanwhile, the whole sealing process does not pollute CCM and does not affect the CCM structure, the membrane electrode seals all areas without defects such as folds and bubbles, and the double-side frame asymmetric sealing structure has high mechanical stability and chemical durability.
Drawings
FIG. 1 is a flow chart of a membrane electrode fabrication process in an embodiment;
FIG. 2 is a schematic view of a curing mold in an embodiment;
fig. 3 is a flow chart of another membrane electrode fabrication process in an embodiment.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a flow chart of a membrane electrode manufacturing process in an embodiment, and referring to fig. 1, the fuel cell membrane electrode manufacturing process includes:
s101, determining a first sealing curing area and a second sealing curing area of the membrane electrode.
In this embodiment, the membrane electrode is configured to include a multi-layer structure, where each layer in the multi-layer structure may be a first frame layer, a second frame layer, and a proton-exchange membrane (CCM) with a catalytic layer;
different layers in the multilayer structure are stacked, for example, a first frame layer, a proton exchange membrane and a second frame layer are sequentially arranged, and the proton exchange membrane is clamped between the first frame layer and the second frame layer.
In this embodiment, the first sealing and curing region corresponds to a first lamination region of the membrane electrode, where curing and/or sealing is required;
setting a second lamination area which corresponds to the film electrode and needs curing and/or sealing treatment in the second sealing curing area;
the first sealing curing area and the second sealing curing area are set to be of an asymmetric structure structurally, and the asymmetric form comprises different shapes of layers or different lamination structures corresponding to different sealing curing areas.
In this embodiment, the manner of determining the first sealing and curing region and the second sealing and curing region of the membrane electrode is not limited, and for example, the sealing and curing regions may be determined by a machine vision related method.
In this embodiment, the manner of positioning the sealing and curing area is the same as that of the prior art, and details thereof will not be described in detail.
S102, positioning the first sealing and curing area to a first boss area of the curing mold, and positioning the second sealing and curing area to a second boss area of the curing mold.
In this embodiment, the laminated structure of the first sealing and curing area is set to include at least a first frame layer and a second frame layer, and the laminated structure of the second sealing and curing area is set to include at least a first frame layer and a proton exchange membrane.
FIG. 2 is a schematic view of a curing mold in an embodiment, and referring to FIG. 2, taking the membrane electrode shown in FIG. 2 as an example, the laminated structure of the first sealing curing zone includes a first frame layer, a second frame layer, and a proton exchange membrane;
namely, a laminated structure formed by a first frame layer 1, a (part of) proton exchange membrane 3 and a second frame layer 2 at the left side part of the membrane electrode is set as a first sealing solidification area;
the laminated structure of the second sealing solidification area comprises a first frame layer and a proton exchange membrane;
that is, the laminated structure of the (partial) first frame layer 1 and the (partial) proton exchange membrane 3 at the right side of the membrane electrode is set as the second sealing curing zone.
Referring to fig. 2, in this embodiment, the setting and curing mold 4 includes a first boss area 6 and a second boss area 5, and the setting of the first boss area 6 and the second boss area 5 is used to assist in the sealing and/or curing operations performed with respect to the first sealing and curing area and the second sealing and curing area.
In this embodiment, the manner of positioning (and moving) the first seal curing area to the first boss area 6 and the second seal curing area to the second boss area 5 is not limited;
for example, the membrane electrode may be moved to a designated position based on a predetermined line and a predetermined control program, thereby aligning the first seal-curing zone with the first land zone 6 and the second seal-curing zone with the second land zone 5.
S103, supporting the membrane electrode by using a curing mold, and processing the first sealing curing area and the second sealing curing area by using a curing process.
Referring to fig. 2, in this solution, when sealing and/or curing is performed on the first sealing and curing area and the second sealing and curing area of the membrane electrode, the membrane electrode is placed on the curing mold 4, and the first sealing and curing area is aligned with the first boss area 6, and the second sealing and curing area is aligned with the second boss area 5;
the curing mold 4 at least has functions of supporting and fixing the membrane electrode when the sealing and/or curing process includes rolling, flat pressing and the like, namely, the first frame layer 1 is attached to the second frame layer 2 through pressing operation, and the first frame layer 1 is attached to the proton exchange membrane through pressing operation.
Referring to fig. 2, based on the above, the first land area 6 is used to compensate for the first height difference in the lamination direction due to the lack of the proton exchange membrane 3, which is generated by curing the first seal curing area;
the second land area 5 is used to compensate for a second height difference in the lamination direction due to the lack of the second frame layer 2, which is generated by curing the second seal curing area.
For example, referring to fig. 2, in this embodiment, in the pressing process, the pressure is set from the first frame layer 1 vertically downward to the curing mold 4, and the first boss area 6 plays a role in the sealing and/or curing process of the membrane electrode:
the method ensures that bubbles are not generated at the junction of the frame (comprising the first frame layer and the second frame layer) and the CCM in the lamination process and the lamination of the first frame layer and the second frame layer due to the missing thickness of the CCM between the first frame layer 1 and the second frame layer 2, and the sealing durability of the membrane electrode is affected;
the second boss area 5 plays a role in the sealing and/or curing process of the membrane electrode:
the die pressure on one side of the first frame layer 1 is prevented from being conducted to the position of the second frame layer 2 (of the second sealing and curing area) which is absent, and the problem of shearing the proton exchange membrane 3 (of the position corresponding to the second sealing and curing area) is further solved.
The embodiment provides a membrane electrode manufacturing process, wherein the manufacturing process comprises the steps of determining a first sealing curing area and a second sealing curing area of a membrane electrode; positioning the first sealing and curing zone to a first boss zone of the curing mold, and positioning the second sealing and curing zone to a second boss zone of the curing mold; the method is characterized in that a curing mold is used for supporting the membrane electrode, a curing process is used for processing a first sealing curing area and a second sealing curing area, wherein the first sealing curing area and the second sealing curing area are of asymmetric structures, based on the method provided by the embodiment, the membrane electrode with an asymmetric double-side frame structure can be effectively processed, the membrane electrode with the asymmetric double-side frame structure can be continuously sealed, the double-side frame asymmetric sealing structure has high mechanical stability and chemical durability, meanwhile, the whole sealing process does not pollute CCM and does not affect the CCM structure, the membrane electrode seals all areas without defects such as folds and bubbles, and the double-side frame asymmetric sealing structure has high mechanical stability and chemical durability.
Based on the scheme shown in fig. 1, in one possible embodiment, fabricating the first frame layer includes:
the adhesive layer of the supporting film is arranged opposite to the protective film, and the supporting film is attached to the protective film through a first process;
arranging a protective film cutting die opposite to the protective film, and cutting the protective film by adopting the protective film cutting die to form a first effective area of the protective film;
removing the waste film of the protective film to leave the first effective area on the support film;
setting a frame substrate opposite to the frame active area cutting die, and cutting the frame substrate by adopting the frame active area cutting die to form a second effective area of the frame substrate;
setting a frame substrate opposite to the support film, and attaching the support film to the frame through a first process;
and removing the back film of the frame substrate and the waste film of the frame substrate, so that the second effective area is left on the support film.
Illustratively, in this embodiment, the first process may be a normal temperature roll lamination, high temperature roll lamination, or other lamination process.
In this embodiment, the shape of the first effective area is not limited, and may be freely set according to design and use requirements.
In this embodiment, the shape of the second effective area is not limited, and may be freely set according to design and use requirements.
Exemplary, in this embodiment, the use of the support film is: the plane support is provided for cutting the protective film and the frame base material, so that the deformation caused by the tension effect and the influence on the flatness of the protective film are prevented when the size of the effective area corresponding to the protective film is smaller;
the problem that the effective area corresponding to the frame base material deforms under the action of tension when the size of the effective area is smaller, and the flatness of the frame is affected is avoided, so that the defects of bubbles, wrinkles and the like in the frame area are avoided when the following attaching operation is carried out on the frame.
Illustratively, in this embodiment, the function of the protective film is set as follows: in the subsequent process, the CCM (proton exchange membrane) is protected from being polluted by materials such as a support membrane, wherein the structure of a CCM catalytic layer is not influenced when the protection membrane is contacted with the CCM, and the CCM is not polluted;
and when the frame base material is attached to the CCM, increasing the height of the overlapping area of the frame base material and the CCM, so that the frame base material is tightly attached to the CCM.
Illustratively, in this solution, the function of the backing film of the frame is: when the frame base material is not used, the adhesive layer of the frame base material is protected.
In this embodiment, the mode of removing the waste film of the protective film, the back film of the frame, and the waste film of the frame substrate is not limited;
for example, taking the waste film from which the protective film is removed as an example, the waste film from which the protective film is removed may be removed by designating a film taking module, wherein the film taking module is the same as the prior art, and the detailed description thereof will not be described in detail.
In the embodiment, the waste film of the protective film is set to be a part of the protective film except the first effective area in the corresponding cutting area after the protective film is cut;
and setting the waste film of the frame as a part of the frame except the second effective area in the corresponding cutting area after cutting the frame.
In this scheme, set for first effective area and second effective area and be located the homonymy of support film.
Based on the scheme shown in fig. 1, in one possible embodiment, fabricating the second frame layer includes:
the adhesive layer of the supporting film is arranged opposite to the protective film, and the supporting film is attached to the protective film through a first process;
arranging a protective film cutting die opposite to the protective film, and cutting the protective film by adopting the protective film cutting die to form a third effective area of the protective film;
removing the waste film of the protective film to leave a third effective area on the support film;
setting a frame substrate opposite to the frame active area cutting die, and cutting the frame substrate by adopting the frame active area cutting die to form a fourth effective area of the frame substrate;
setting a frame substrate opposite to the support film, and attaching the support film to the frame through a first process;
and removing the back film of the frame substrate and the waste film of the frame substrate, so that the fourth effective area is remained on the support film.
Illustratively, in this embodiment, the first process may be a normal temperature roll lamination, high temperature roll lamination, or other lamination process.
In this embodiment, the shape of the third effective area is not limited, and may be freely set according to design and use requirements.
In this embodiment, the shape of the fourth effective area is not limited, and may be freely set according to design and use requirements.
Exemplary, in this embodiment, the use of the support film is: the plane support is provided for cutting the protective film and the frame base material, so that the deformation caused by the tension effect and the influence on the flatness of the protective film are prevented when the size of the effective area corresponding to the protective film is smaller;
the problem that the effective area corresponding to the frame base material deforms under the action of tension when the size of the effective area is smaller, and the flatness of the frame is affected is avoided, so that the defects of bubbles, wrinkles and the like in the frame area are avoided when the following attaching operation is carried out on the frame.
Illustratively, in this embodiment, the function of the protective film is set as follows: in the subsequent process, the CCM (proton exchange membrane) is protected from being polluted by materials such as a support membrane, wherein the structure of a CCM catalytic layer is not influenced when the protection membrane is contacted with the CCM, and the CCM is not polluted;
and when the frame base material is attached to the CCM, increasing the height of the overlapping area of the frame base material and the CCM, so that the frame base material is tightly attached to the CCM.
Illustratively, in this embodiment, the backing film of the bezel substrate is configured to function as: when the frame base material is not used, the adhesive layer of the frame base material is protected.
In this embodiment, the mode of removing the waste film of the protective film, the back film of the frame substrate, and the waste film of the frame substrate is not limited;
for example, taking the waste film from which the protective film is removed as an example, the waste film from which the protective film is removed may be removed by designating a film taking module, wherein the film taking module is the same as the prior art, and the detailed description thereof will not be described in detail.
In the embodiment, the waste film of the protective film is set to be a part of the protective film except the third effective area in the corresponding cutting area after the protective film is cut;
and setting the waste film of the frame base material as a part of the frame base material except the fourth effective area in the corresponding cutting area after cutting the frame base material.
In this scheme, the third effective area and the fourth effective area are set to be located on the same side of the support film.
On the basis of the foregoing scheme for making the first frame layer, in an implementation manner, the attaching of the first frame layer to the proton exchange membrane includes:
setting a proton exchange membrane cutter opposite to the proton exchange membrane, and cutting the proton exchange membrane by adopting the proton exchange membrane cutter to form a fifth effective area, and removing the waste membrane of the proton exchange membrane;
attaching the first frame layer to the fifth effective area by adopting a first process;
the fifth effective area and the first effective area are positioned on the same side of the support film.
In this embodiment, the shape of the fifth effective area is not limited, and may be freely set according to design and use requirements.
In this embodiment, the waste proton exchange membrane is set to be a part of the proton exchange membrane except the fifth effective area in the corresponding cutting area after the proton exchange membrane is cut.
In this scheme, the mode of removing the waste membrane of the proton exchange membrane is not limited, and the waste membrane of the proton exchange membrane can be removed by designating a membrane taking component, wherein the membrane taking component is the same as the prior art, and the specific content is not described in detail.
On the basis of the above-mentioned scheme for manufacturing the first frame layer, in one possible embodiment, the peel strength between the adhesive layer of the support film and the frame substrate is set to be 0.2 to 1N/cm.
For example, in this solution, if the peel strength is smaller, defects such as bubbles may not be avoided when the support film is attached to the frame substrate;
if the peeling strength is large, a large pulling force is required when the support film is separated from the frame base material, and the frame base material is deformed greatly, so that the frame base material is damaged or the bonding state of the frame base material and the CCM is affected.
In one embodiment, the elastic modulus of the support film is set to 2000 to 3000Mpa, based on the above-described method for producing the first frame layer.
For example, in the present solution, if the elastic modulus is smaller, the supporting film cannot play a supporting role, and is easy to deform under tension;
if the elastic modulus is larger, then in the process of attaching the first frame layer and the second frame layer, the support film cannot reach the specified deformation amount under the pressure of the die, and the first frame layer and the second frame layer are difficult to attach.
On the basis of the above-mentioned arrangement of the first frame layer and the proton exchange membrane attaching scheme, in one possible implementation, the cutting size of the first effective area is set to be larger than the cutting size of the fifth effective area;
in the scheme, the boundary of the first effective area is set to be expanded outwards by 0.5-5 mm in parallel compared with the boundary of the fifth effective area.
For example, in the present solution, if the cutting size of the first effective area is too small and is smaller than the fitting alignment precision (of the first effective area and the fifth effective area), the CCM cannot be protected; if the cutting size of the first effective area is too large, the cost of the membrane electrode is increased.
In the scheme, the inner side boundary of the second effective area is set to be expanded inwards by 0.5-5 mm in parallel compared with the inner side boundary of the fourth effective area.
For example, in this solution, if the inner boundary of the second effective area is smaller than the inner boundary of the fourth effective area in parallel, an asymmetric structure cannot be realized under the condition of the existing alignment accuracy limitation;
if the inner boundary of the second effective area is larger than the inner boundary of the fourth effective area in parallel, the effective active area of the membrane electrode is reduced, and the electrochemical performance of the single membrane electrode is reduced.
For example, if the inner boundary of the second effective area is extended in parallel outwards compared with the inner boundary of the fourth effective area, the first frame layer is bonded to the proton exchange membrane according to the process flow, and then when the second frame layer is bonded to the proton exchange membrane, the second frame layer is made to grow out of the proton exchange membrane with a corresponding size compared with the first frame;
at this time, the proton exchange membrane with corresponding size lacks corresponding support because of the height difference between the long proton exchange membrane and the second frame layer, and bubbles and wrinkles are easy to appear and the binding force between the second frame layer and the proton exchange membrane is reduced.
On the basis of the scheme shown in fig. 1, the setting and curing process comprises one or more of rolling, flattening and ultraviolet irradiation.
In one embodiment, the cut depth of the protective film is set to be the same as the thickness of the protective film on the basis of the above-described scheme for manufacturing the first frame layer.
On the basis of the above-mentioned scheme for manufacturing the first frame layer, in one possible embodiment, the cut depth of the frame substrate is set to be the same as the thickness of the frame substrate.
Fig. 3 is a flow chart of another membrane electrode fabrication process in an example, referring to fig. 3 and 2, in one possible embodiment, the membrane electrode fabrication process comprises:
the adhesive layer provided with the supporting film is opposite to the protective film, and the supporting film is attached to the protective film through a rolling process
Arranging a protective film cutting die opposite to the protective film, and cutting the protective film by adopting the protective film cutting die (half) to form a first effective area of the protective film;
removing the waste film of the protective film to leave the first effective area on the support film;
setting a first frame substrate opposite to a frame active area cutting die, and cutting the first frame substrate by adopting the frame active area cutting die to form a second effective area of the first frame substrate;
setting a first frame substrate opposite to the support film, and bonding the support film to the first frame substrate through a rolling process;
removing the back film of the first frame substrate and the waste film of the first frame substrate, so that the second effective area is remained on the support film to form a first frame layer;
setting a proton exchange membrane cutter opposite to a proton exchange membrane (CCM), and cutting the proton exchange membrane by adopting the proton exchange membrane cutter to form a fifth effective area, so as to remove the waste membrane of the proton exchange membrane;
laminating the first frame layer and the fifth effective area by adopting a rolling process, wherein the fifth effective area and the first effective area are positioned on the same side of the support film;
the adhesive layer of the supporting film is arranged opposite to the protective film, and the supporting film is attached to the protective film through a first process;
arranging a protective film cutting die opposite to the protective film, and cutting the protective film by adopting the protective film cutting die to form a third effective area of the protective film;
removing the waste film of the protective film to leave a third effective area on the support film;
setting a second frame base material opposite to the frame active area cutting die, and cutting the second frame base material by adopting the frame active area cutting die to form a fourth effective area of the second frame base material;
setting a second frame base material opposite to the support film, and attaching the support film to the second frame base material through a rolling process;
removing the back film of the second frame substrate and the waste film of the second frame substrate, so that a fourth effective area is left on the support film to form a second frame layer;
wherein the third effective area and the fourth effective area are positioned on the same side of the support film;
determining a first sealing curing area and a second sealing curing area of the membrane electrode;
positioning the first sealing and curing zone to a first boss zone of the curing mold, and positioning the second sealing and curing zone to a second boss zone of the curing mold;
adopting a curing mold to support the membrane electrode, and adopting a curing process to process the first sealing curing area and the second sealing curing area;
the first sealing curing area comprises a first frame layer, a proton exchange membrane and a second frame layer, and the second sealing curing area comprises the first frame layer and the proton exchange membrane;
the curing process comprises the steps of pre-laminating the first sealing curing area and the second sealing curing area by adopting any one or at least two of normal temperature rolling lamination, high temperature rolling lamination, ultraviolet irradiation rolling lamination and the like;
subsequently, the first seal curing zone and the second seal curing zone are cured using any one or a combination of at least two of rolling, platen pressing, or ultraviolet irradiation.
In the scheme, the peeling strength range of the adhesive layer of the support film and the frame base material is set to be 0.2N/cm, and the elastic modulus range of the support film is set to be 2000Mpa;
or, the peel strength range of the adhesive layer of the support film and the frame base material can be set to be 1.0N/cm, and the elastic modulus range of the support film is set to be 3500MPa.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A process for manufacturing a fuel cell membrane electrode, comprising:
determining a first sealing curing area and a second sealing curing area of the membrane electrode;
positioning the first sealing and curing zone to a first boss zone of a curing mold, and positioning the second sealing and curing zone to a second boss zone of the curing mold;
adopting the curing mold to support the membrane electrode, and adopting a curing process to process the first sealing curing area and the second sealing curing area;
the laminated structure of the first sealing solidification area at least comprises a first frame layer and a second frame layer;
the laminated structure of the second sealing solidification zone at least comprises the first frame layer and a proton exchange membrane, and the proton exchange membrane comprises a catalytic layer;
the processing of the first sealing solidification area comprises the steps of enabling the first frame layer and the second frame layer to be attached;
the first boss region is used for compensating for a first height difference generated in the stacking direction due to the lack of the proton exchange membrane when the first sealing curing region is cured;
the second boss region is used for compensating for a second height difference generated in the lamination direction due to the lack of the second frame layer when the second sealing curing region is cured.
2. The process for manufacturing a membrane electrode assembly for a fuel cell of claim 1, wherein manufacturing said first border layer comprises:
the adhesive layer of the supporting film is arranged opposite to the protective film, and the supporting film is attached to the protective film through a first process;
arranging a protective film cutting die opposite to the protective film, and cutting the protective film by adopting the protective film cutting die to form a first effective area of the protective film;
removing the waste film of the protective film to leave the first effective area on the support film;
setting a frame substrate opposite to a frame active area cutting die, and cutting a frame by adopting the frame active area cutting die to form a second effective area of the frame, wherein the frame comprises the frame substrate;
setting the frame base material opposite to the support film, and attaching the support film to the frame base material through the first process;
removing the back film of the frame and the waste film of the frame, so that the second effective area is left on the supporting film;
the first active region and the second active region are located on the same side of the support film.
3. The process for fabricating a fuel cell membrane electrode according to claim 2 wherein fabricating said second frame layer comprises:
the adhesive layer of the supporting film is arranged opposite to the protective film, and the supporting film is attached to the protective film through a first process;
arranging a protective film cutting die opposite to the protective film, and cutting the protective film by adopting the protective film cutting die to form a third effective area of the protective film;
removing the waste film of the protective film to leave the third effective area on the support film;
setting a frame substrate opposite to a frame active area cutting die, and cutting the frame by adopting the frame active area cutting die to form a fourth effective area of the frame, wherein the frame comprises the frame substrate;
setting the frame base material opposite to the support film, and attaching the support film to the frame base material through the first process;
removing the back film of the frame and the waste film of the frame, so that the fourth effective area is left on the supporting film;
the third effective region and the fourth effective region are located on the same side of the support film.
4. The process for manufacturing a membrane electrode assembly of claim 2 wherein said first frame layer is bonded to said proton exchange membrane comprising:
arranging a proton exchange membrane cutter opposite to the proton exchange membrane, and cutting the proton exchange membrane by adopting the proton exchange membrane cutter to form a fifth effective area;
attaching the first frame layer to the fifth effective area by adopting the first process, and removing the waste film of the proton exchange film;
the fifth effective region is located on the same side of the support film as the first effective region.
5. The process for manufacturing a membrane electrode assembly for a fuel cell according to claim 2, wherein the peel strength between the adhesive layer of the support film and the frame base material is set to be 0.2 to 1N/cm.
6. The process for manufacturing a fuel cell membrane electrode according to claim 2 wherein the elastic modulus of the support film is 2000 to 3000Mpa.
7. The fuel cell membrane electrode fabrication process according to claim 4 wherein the cut size of the first active area is greater than the cut size of the fifth active area;
wherein the boundary of the first effective area is expanded in parallel by 0.5-5 mm outwards compared with the boundary of the fifth effective area.
8. The fuel cell membrane electrode fabrication process according to claim 3 wherein an inside cut size of said second active area is smaller than an inside cut size of said fourth active area;
wherein the inner boundary of the second effective area is expanded inward in parallel by 0.5-5 mm compared with the inner boundary of the fourth effective area.
9. The process for manufacturing a fuel cell membrane electrode according to claim 2 wherein the cut depth of the protective film is the same as the thickness of the protective film.
10. The process of claim 2, wherein the frame has a cut depth equal to a thickness of the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311473499.3A CN117374342A (en) | 2023-11-07 | 2023-11-07 | Fuel cell membrane electrode manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311473499.3A CN117374342A (en) | 2023-11-07 | 2023-11-07 | Fuel cell membrane electrode manufacturing process |
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| CN117374342A true CN117374342A (en) | 2024-01-09 |
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| CN202311473499.3A Pending CN117374342A (en) | 2023-11-07 | 2023-11-07 | Fuel cell membrane electrode manufacturing process |
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