CN217983406U

CN217983406U - Device for improving large-area flat plate heat transfer rate of membrane electrode

Info

Publication number: CN217983406U
Application number: CN202221882137.0U
Authority: CN
Inventors: 李丹; 吴聪萍; 姚颖方; 邹志刚
Original assignee: Jiangsu Yanchang Sanglaite New Energy Co ltd; Kunshan Innovation Institute of Nanjing University; Foshan Xianhu Laboratory
Current assignee: Jiangsu Yanchang Sanglaite New Energy Co ltd; Kunshan Innovation Institute of Nanjing University; Foshan Xianhu Laboratory
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-12-06
Anticipated expiration: 2032-07-21

Abstract

The utility model relates to a battery membrane electrode technical field specifically discloses a improve device of dull and stereotyped heat-transfer seal rate of membrane electrode large tracts of land. The equipment comprises a film covering device and a transfer printing and laminating device; the film laminating device comprises a first vacuum adsorption platform, a first feeding assembly, a first rubber roller and a first die-cutting mechanism; the transfer printing and attaching device comprises a second vacuum adsorption platform, a second feeding assembly, a steel roller, a second rubber roller and a second die cutting mechanism; the utility model discloses an equipment can effectively improve the rendition rate.

Description

Device for improving large-area flat plate thermal transfer printing rate of membrane electrode

Technical Field

The utility model relates to a battery membrane electrode technical field especially relates to a improve device of dull and stereotyped heat-transfer seal rate of membrane electrode large tracts of land.

Background

Proton Exchange Membrane Fuel Cells (PEMFCs) have been widely spotlighted globally in recent years as a new clean energy source due to their low or even no pollution. The Membrane Electrode Assembly (MEA), which is the core component of PEMFCs, is the main site for redox generation of fuel cells, and is the focus of research by researchers, especially on the manufacturing process thereof.

The CCM (Catalyst Coated Membrane) method is currently widely used, in which a Catalyst layer is formed on a proton exchange Membrane and then combined with a gas diffusion layer to form an MEA. The CCM method is generally used in a spray coating process and a coating process, and the coating process is more suitable for mass production than the spray coating process. The coating process is divided into direct coating and indirect coating. The indirect coating is to coat, print or spray the prepared catalyst slurry on a certain transfer medium, and transfer the catalyst layer of the transfer medium onto the proton exchange membrane after drying to obtain the proton exchange membrane covered by the catalyst. Since the solvent is removed before the transfer, swelling does not occur as compared to the direct coating of the proton exchange membrane, and the binding force of the catalyst layer to the proton exchange membrane is enhanced, the transfer method is considered to be a suitable method for commercially continuously producing the membrane electrode.

In the traditional process of preparing the membrane electrode by flat plate hot-pressing transfer printing, due to the non-uniformity of the coating of the catalyst layer on the transfer printing medium and the binder contained in the catalyst layer, although the surface of the transfer printing medium is quite smooth, the catalyst on the edges of the proton exchange membrane and the transfer printing medium can not be completely transferred to the membrane due to the non-uniform stress during hot pressing, so that the transfer printing rate of the catalyst is reduced, and the manufacturing cost of the membrane electrode is increased. In order to improve the transfer rate, researchers have conducted a lot of research on transfer films, liquid nitrogen cooling and stripping, auxiliary layer addition, hot pressing temperature and hot pressing time, and the like.

Chinese patent CN 110808392A is a proton exchange membrane, which is bent to form several sequentially stacked proton exchange membranes, and a gap is left between two adjacent proton exchange membranes, a transfer medium with a single-sided coating of an anode catalyst or a cathode catalyst is disposed on the outer surfaces of a first proton exchange membrane and a last proton exchange membrane, and in each two adjacent gaps, a transfer medium with a double-sided coating of an anode catalyst is inserted in one gap, and a transfer medium with a double-sided coating of a cathode catalyst is inserted in the other gap, so that one side of each proton exchange membrane corresponds to the anode catalyst, and the other side corresponds to the cathode catalyst. However, the method has the defects that the middle part of the multilayer stack is heated slowly, the hot pressing temperature and the hot pressing time need to be increased, the alignment in the stacking process is difficult, air is easy to remain in the middle gap, and defects are generated.

Japanese patent application publication No. 2010-153188A discloses a method of producing a fuel cell membrane electrode, in which a catalyst slurry is applied to a base material, the catalyst slurry is dried to obtain a catalyst layer, the base material and the catalyst layer constitute a transfer sheet, the catalyst layer surface of the transfer sheet is overlapped with the upper surface and the lower surface of an electrolyte membrane, then a gel-like member is disposed on each catalyst layer transfer sheet, the gel-like member is slightly larger than the transfer sheet and has a peripheral edge portion in contact with the electrolyte membrane, and the catalyst layer is transferred onto the electrolyte membrane by hot pressing. However, this method has a disadvantage that a double-sided gel member is used, and lamination between the gel member and a transfer substrate, and between the transfer substrate and an electrolyte membrane is liable to cause voids due to incomplete air discharge, resulting in failure to transfer a part of the catalyst layer.

Aiming at the defects in the prior flat plate heat transfer printing production technology, a reasonable improved device is provided, so that the defects in the prior art can be effectively solved.

Disclosure of Invention

The utility model aims to provide an improve equipment of membrane electrode large tracts of land dull and stereotyped heat-transfer seal rate, can effectively improve the rendition rate.

To achieve the purpose, the utility model adopts the following technical proposal:

an apparatus for improving the heat transfer rate of a large-area flat plate of a membrane electrode comprises a membrane laminating device and a transfer laminating device; the film covering device includes:

the first vacuum adsorption platform is used for adsorbing a release film with micropores and a transfer medium which is attached to the top surface of the release film and is provided with a catalyst layer;

a first feed assembly for providing viscous material to the first vacuum adsorption platform;

the first rubber roller is rotatably arranged above the first vacuum adsorption platform and can move up and down and horizontally roll relative to the first vacuum adsorption platform; and

the first die cutting mechanism is used for cutting the viscous material;

the transfer attaching device includes:

the second vacuum adsorption platform is used for adsorbing and fixing the steel plate with the silica gel sheet on the top surface;

the second feeding assembly is used for providing a proton exchange membrane for the second vacuum adsorption platform;

the steel roller and the second rubber roller are arranged above the second vacuum adsorption platform in parallel in a rotatable manner, and can move up and down and synchronously roll horizontally relative to the second vacuum adsorption platform; and

and the second die cutting mechanism is used for cutting the proton exchange membrane.

Furthermore, the first feeding assembly and the second feeding assembly comprise an unwinding roller, a winding roller and a group of guide rollers arranged up and down, and the guide rollers positioned below are higher than the corresponding first vacuum adsorption platform or the second vacuum adsorption platform.

Further, the first die-cutting mechanism comprises a first die-cutting knife and a punching assembly which are arranged side by side, a first die-cutting knife driving piece and a punching driving piece; the punching assembly is close to the first feeding assembly and comprises a connecting seat, two punching pieces connected to the bottom surface of the connecting seat, a first pressing plate and a first spring, and the first pressing plate is connected with the bottom surface of the connecting seat through the first spring.

Furthermore, the first vacuum adsorption platform is provided with two blanking holes; one end, away from first feed assembly, of the top surface of first vacuum adsorption platform is provided with two locating pins.

Furthermore, two ends of the first rubber roller are connected with two first air cylinders for driving the first rubber roller to lift; the two first air cylinders are connected with a first horizontal driving component which pneumatically moves synchronously and horizontally.

Furthermore, the second die-cutting mechanism comprises a second die-cutting tool holder, a second die-cutting tool arranged on the second die-cutting tool holder, a second pressing plate and a second spring, and the second pressing plate is connected with the second die-cutting tool holder through the second spring.

Furthermore, two ends of the second rubber roll are connected with two second air cylinders for driving the second rubber roll to lift; two third air cylinders for driving the steel roller to lift are connected to two ends of the steel roller; the second cylinder and the third cylinder on the same side are connected with a second horizontal driving assembly for driving the second cylinder and the third cylinder to synchronously and horizontally move.

The utility model has the advantages that:

1. the utility model relates to a rendition rate problem of transfer printing method preparation fuel cell membrane electrode in-process catalyst layer, mainly used dull and stereotyped hot pressing rendition, especially great area heat-transfer seal can improve the rendition rate effectively.

2. The utility model discloses can get rid of the air between rendition substrate and the proton exchange membrane as far as possible, improve the utilization ratio of rendition in-process catalyst.

3. The utility model discloses in, can improve support intensity, non-deformable through carrying out the tectorial membrane to the rendition medium.

4. The method is convenient, fast and easy to operate, and can meet the requirements of scientific research units and manufacturers.

Drawings

FIG. 1 is a schematic structural diagram of a film laminating apparatus for improving the large-area flat-plate thermal transfer printing rate of a membrane electrode.

FIG. 2 is a schematic structural diagram of a transfer bonding apparatus for improving the thermal transfer efficiency of a large-area flat plate of a membrane electrode.

In the figure: 100-a film covering device; 101-a first vacuum adsorption platform; 102-a release film; 103-a transfer medium; 104-a viscous material; 105-an unwinding roller; 106-a wind-up roll; 107-locating pins; 108-a first rubber roller; 109-a first die-cutting rule; 111-a first cylinder; 112-a first horizontal drive assembly; 113-a first platen; 114-a catalyst layer; 115-protective film of adhesive material; 116-positioning holes; 117-guide rollers; 120-a first feed assembly; 130-a first die-cutting mechanism; 200-a transfer attaching device; 201-a second vacuum adsorption platform; 202-a second horizontal drive assembly; 203-a second cylinder; 204-a second rubber roller; 205-steel plate; 206-silica gel sheet; 208-a proton exchange membrane; 210-proton exchange membrane protective film; 213-a second platen; 214-a third cylinder; 215-steel roll; 220-second feed assembly.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 2, an apparatus for improving the thermal transfer rate of a large-area flat plate of a membrane electrode comprises a film coating device 100 and a transfer laminating device 200.

Specifically, as shown in fig. 1, the laminating device 100 includes a first vacuum adsorption platform 101, a first feeding assembly 120, a first rubber roller 108, and a first die-cutting mechanism 130. The first vacuum adsorption platform 101 is used for adsorbing a release film 102 with micropores and a transfer medium 103 which is attached to the top surface of the release film 102 and has a catalyst layer 114; a first feed assembly 120 for supplying viscous material 104 to the first vacuum adsorption platform 101; the first rubber roller 108 is rotatably arranged above the first vacuum adsorption platform 101 and can move up and down and horizontally roll relative to the first vacuum adsorption platform 101; the first die cutting mechanism 130 is used to cut the viscous material 104.

The first feeding assembly 120 includes an unwinding roller 105 for unwinding the adhesive material 104, a winding roller 106 for winding the adhesive material protection film 115, and a set of guide rollers 117 disposed above and below, and the guide roller 117 located below is higher than the first vacuum adsorption platform 101, so that the rear end of the adhesive material 104 conveyed to the first vacuum adsorption platform 101 is higher than the front end.

The first die-cutting mechanism 130 includes a first die-cutting rule 109, a punching assembly, a first die-cutting rule driving member, and a punching driving member, which are disposed side by side. The punching assembly is arranged close to the first feeding assembly 120 and comprises a connecting seat, two punching pieces connected to the bottom surface of the connecting seat, a first pressing plate 113 and a first spring, and the first pressing plate 113 is connected with the bottom surface of the connecting seat through the first spring. The first die-cutting rule driving piece and the punching driving piece are air cylinders, electric cylinders or hydraulic cylinders.

Further, the first vacuum adsorption platform 101 is provided with two blanking holes to discharge punching waste; the end of the top surface of the first vacuum adsorption platform 101 away from the first feeding assembly 120 is provided with two positioning pins 107 to realize accurate positioning of the viscous material.

Two ends of the first rubber roll 108 are connected with two first cylinders 111 for driving the first rubber roll to lift; two first air cylinders 111 are connected with a first horizontal driving assembly 112 which is pneumatically driven to synchronously move horizontally. The first horizontal driving assembly 112 is a linear sliding table or a belt driving assembly driven by a servo motor, and is not described in detail herein because it is a prior art. When the rubber roller lifting device is used, the two first air cylinders 111 are used for driving the first rubber roller 108 to lift, so that the pressure of the first rubber roller 108 can be adjusted; under the driving of the first horizontal driving assembly 112, the first rubber roller 108 rolls along the horizontal direction to bond the viscous material 104, the transfer medium 103 and the release film 102 into a whole.

As shown in fig. 2, the transfer attaching device 200 includes a second vacuum suction platform 201, a second feeding assembly 220, a steel roller 215, a second rubber roller 204, and a second die cutting mechanism. The second vacuum adsorption platform 201 is used for adsorbing and fixing a steel plate 205 with a silica gel sheet 206 on the top surface; the second feed assembly 220 is used for providing the proton exchange membrane 208 to the second vacuum adsorption platform 201; the steel roller 215 and the second rubber roller 204 are arranged side by side and rotatably arranged above the second vacuum adsorption platform 201, and can move up and down and synchronously roll horizontally relative to the second vacuum adsorption platform 201; the second die cutting mechanism is used for cutting the proton exchange membrane 208.

The second feeding assembly 220 has the same structure as the first feeding assembly 120, and includes an unwinding roller 105 for unwinding the proton exchange membrane 208, a winding roller 106 for winding the proton exchange membrane protective film 210, and a set of guide rollers 117 disposed up and down, and the guide roller 117 located below is higher than the second vacuum adsorption platform 201, so that the rear end of the proton exchange membrane 208 transported to the second vacuum adsorption platform 201 is higher than the front end.

The second die cutting mechanism comprises a second die cutting tool holder, a second die cutting tool arranged on the second die cutting tool holder, a second die cutting tool driving piece for driving the second die cutting tool holder to lift, a second pressing plate 213 and a second spring, wherein the second pressing plate 213 is connected with the second die cutting tool holder through the second spring. The second die-cutting rule driving piece is an air cylinder, an electric cylinder or a hydraulic cylinder.

Two ends of the second rubber roller 204 are connected with two second air cylinders 203 for driving the second rubber roller to lift; two ends of the steel roller 215 are connected with two third air cylinders 214 for driving the steel roller to lift; the second cylinder 203 and the third cylinder 214 on the same side are connected with a second horizontal driving assembly 202 for driving the same to synchronously move horizontally. The second horizontal driving assembly 202 is a linear sliding table or a belt driving assembly driven by a servo motor, and is not described in detail herein since it is a prior art.

The utility model discloses a method of use includes following step:

s1: sequentially adsorbing and fixing a release film 102 with micropores and a transfer medium 103 by using a first vacuum adsorption platform 101, wherein one surface of the transfer medium 103 coated with a catalyst layer 114 is attached to the release film 102;

s2: a first supply assembly 120 is used for supplying the adhesive material 104 with the protective film removed to the first vacuum adsorption platform 101, and the rear end of the adhesive material 104 is higher than the front end; the two positioning pins 107 are matched with the two positioning holes 116 of the viscous material 104, so that the front end of the viscous material 104 is fixed on the first vacuum adsorption platform 101;

s3: after the first rubber roller 108 is adjusted to a preset height, the first rubber roller 108 rolls along the horizontal direction, and the viscous material 104, the transfer medium 103 and the release film 102 are bonded into a whole;

s4: by adopting the first die-cutting mechanism 130, the rear end of the viscous material 104 is firstly pressed on the first vacuum adsorption platform 101 for punching, then the viscous material 104 is cut off, and the film coating of the transfer medium 103 is completed;

s5: a second vacuum adsorption platform 201 is adopted to adsorb and fix a steel plate 205 with a silica gel sheet 206 on the top surface; positioning the transfer medium 103 coated with the film on the top surface of the silica gel sheet 206, and removing the release film 102 to enable the surface coated with the catalyst layer 114 to be arranged upwards;

s6: a second feeding assembly 220 is adopted to provide the proton exchange membrane 213 without the protective membrane to the second vacuum adsorption platform 201, wherein the rear end of the proton exchange membrane 213 is higher than the front end; the front end of the proton exchange membrane 208 is arranged below the steel roller 215 and is aligned and bonded with the front end of the viscous material;

s7: taking the transfer medium 103 coated with the second film, removing the release film 102 to enable the surface coated with the catalyst layer 114 to be arranged downwards and slightly attached to a steel roller 215; the two positioning pins 107 are matched with the two positioning holes 116 of the viscous material 104, so that the front end of the second transfer medium 103 coated with the film is fixed on the second vacuum adsorption platform 201, and the rear end is lifted to avoid being bonded with the proton exchange membrane 208;

s8: after the second rubber roller 204 and the steel roller 215 are adjusted to the preset height, the second rubber roller 204 and the steel roller 215 roll together along the horizontal direction, and the two transfer mediums 103 coated with the films are compounded and bonded with the proton exchange membrane 208 to form a complex;

s9: a second die cutting mechanism is adopted, the rear end of the proton exchange membrane 208 is firstly pressed on the second vacuum adsorption platform 201 and then cut off;

s10: after placing the steel plates on the top surface of the complex, putting the complex and the two steel plates into a hot press for hot-pressing transfer printing; after cooling, the transfer medium 103 and the viscous material 104 are removed to obtain the CCM membrane electrode.

The base material of the adhesive material 104 is a polyimide film or polyethylene naphthalate PEN material, and the adhesive layer is a pressure-sensitive adhesive. The thickness of the silica gel sheet 206 is 1 mm to 5 mm. The silicone sheet may be a silicone foam board, a rubber pad, or the like, but is adhered to the steel plate 205 without a gap.

In addition, the external dimension of the cut viscous material is larger than the external dimensions of the cut proton exchange membrane and the transfer printing medium and smaller than the external dimensions of the release membrane and the silica gel sheet.

The utility model discloses a device for improving the heat transfer rate of a large-area flat plate of a membrane electrode, which is suitable for the heat transfer of a large-area flat plate and can effectively improve the transfer rate; air between the transfer printing substrate and the proton exchange membrane can be eliminated as much as possible, and the utilization rate of the catalyst in the transfer printing process is improved; the supporting strength can be improved by laminating the transfer medium, and the transfer medium is not easy to deform; the method is convenient, quick and easy to operate, and can meet the requirements of scientific research institutions and manufacturers.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The device for improving the large-area flat plate thermal transfer printing rate of the membrane electrode is characterized by comprising a film laminating device (100) and a transfer printing and laminating device (200); the film covering device (100) comprises:

the first vacuum adsorption platform (101) is used for adsorbing a release film (102) with micropores and a transfer printing medium (103) which is attached to the top surface of the release film (102) and is provided with a catalyst layer (114);

a first feed assembly (120) for providing viscous material (104) to the first vacuum adsorption platform (101);

the first rubber roller (108) is rotatably arranged above the first vacuum adsorption platform (101) and can move up and down and horizontally roll relative to the first vacuum adsorption platform (101); and

a first die cutting mechanism (130) for cutting the viscous material (104);

the transfer bonding apparatus (200) includes:

the second vacuum adsorption platform (201) is used for adsorbing and fixing the steel plate (205) with the top surface provided with the silica gel sheet (206);

a second feed assembly (220) for providing a proton exchange membrane (208) to the second vacuum adsorption platform (201);

the steel roller (215) and the second rubber roller (204) are arranged above the second vacuum adsorption platform (201) side by side in a rotatable manner, and can move up and down and synchronously horizontally roll relative to the second vacuum adsorption platform (201); and

and the second die cutting mechanism is used for cutting the proton exchange membrane (208).

2. The apparatus for improving the thermal transfer rate of a membrane electrode large-area flat plate according to claim 1, wherein the first supply assembly (120) and the second supply assembly (220) each comprise an unwinding roller (105), a winding roller (106) and a set of guide rollers (117) arranged above and below, and the guide rollers (117) below are higher than the corresponding first vacuum adsorption platform (101) or second vacuum adsorption platform (201).

3. The apparatus for improving the thermal transfer printing efficiency of a membrane electrode large-area flat plate according to claim 1, wherein the first die-cutting mechanism (130) comprises a first die-cutting blade (109) and a punching assembly, a first die-cutting blade driving member and a punching driving member which are arranged side by side; the punching assembly is arranged close to the first feeding assembly (120) and comprises a connecting seat, two punching pieces connected to the bottom surface of the connecting seat, a first pressing plate (113) and a first spring, and the first pressing plate (113) is connected with the bottom surface of the connecting seat through the first spring.

4. The device for improving the heat transfer rate of the large-area flat plate of the membrane electrode according to claim 3, wherein the first vacuum adsorption platform (101) is provided with two blanking holes; and one end, far away from the first feeding assembly (120), of the top surface of the first vacuum adsorption platform (101) is provided with two positioning pins (107).

5. The device for improving the thermal transfer printing rate of the membrane electrode large-area flat plate according to claim 1, wherein two ends of the first rubber roller (108) are connected with two first air cylinders (111) for driving the first rubber roller to lift; a first horizontal driving assembly (112) for pneumatically driving the first cylinders to synchronously and horizontally move is connected with the two first cylinders.

6. The apparatus for improving the thermal transfer printing rate of a large-area flat plate of a membrane electrode according to claim 1, wherein the second die-cutting mechanism comprises a second die-cutting tool seat, a second die-cutting tool mounted on the second die-cutting tool seat, a second pressing plate (213), and a second spring, and the second pressing plate (213) is connected to the second die-cutting tool seat through the second spring.

7. The device for improving the thermal transfer printing rate of the large-area flat plate of the membrane electrode according to claim 1, wherein two ends of the second rubber roller (204) are connected with two second air cylinders (203) for driving the second rubber roller to ascend and descend; two third air cylinders (214) for driving the steel roller (215) to lift are connected to two ends of the steel roller; the second air cylinder (203) and the third air cylinder (214) on the same side are connected with a second horizontal driving assembly (202) for driving the second air cylinder and the third air cylinder to synchronously and horizontally move.