CN218502493U - Proton exchange membrane coating equipment - Google Patents

Abstract

The utility model relates to a proton exchange membrane coating equipment, include unwinding device, coating unit, first drying device, second drying device, coiling mechanism and shell the membrane device. The proton exchange membrane can firstly move along the first coating route to realize the coating of the first catalyst layer, thereby obtaining the two-in-one material belt. After the two-in-one material belt is rolled by the rolling device, the two-in-one material belt can be transferred to the unwinding device to be unwound. The two-in-one material belt unreeled by the unreeling device can move along a second coating route to realize coating of the second catalyst layer, so that the CCM material belt is obtained. The first drying device and the second drying device can meet the drying requirements of two different catalyst layers respectively. Moreover, the unwinding device, the coating device and the winding device are shared by the first coating route and the second route, so that compared with the two traditional devices, the proton exchange membrane coating device realizes double-sided coating, and is smaller in size and more compact in structure.

Description

Proton exchange membrane coating equipment

Technical Field

The utility model relates to a fuel cell technical field, in particular to proton exchange membrane coating equipment.

Background

The core component of the hydrogen fuel cell is a Membrane electrode, and before preparing the Membrane electrode, an intermediate product CCM (Catalyst Coated Membrane) assembly needs to be prepared, and an anode Catalyst layer are respectively formed on two sides of a proton exchange Membrane, so that the CCM assembly can be prepared.

The common process adopts two sets of coating equipment, firstly, a cathode is coated on the cathode coating equipment, then, the cathode is dried and rolled, then, a coil material is discharged again, anode coating is carried out on the anode coating equipment, and the coil material is rolled again after drying to obtain a finished product of the CCM component. However, the two sets of equipment occupy large area, so that the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a proton exchange membrane coating apparatus with a compact structure.

A proton exchange membrane coating device comprises an unreeling device, a coating device, a first drying device, a second drying device, a reeling device and a membrane peeling device, wherein a first coating route and a second coating route are formed on the proton exchange membrane coating device;

the second route is provided with the unreeling device, the coating device, the second drying device and the reeling device, the two-in-one material belt unreeled by the unreeling device can move along the second coating route, the membrane peeling device tears off the protective film material belt on the second surface of the proton exchange membrane, the coating device can coat a second catalyst layer on the second surface of the proton exchange membrane to obtain a CCM material belt, the reeling device can roll the CCM material belt, one of the first catalyst layer and the second catalyst layer is an anode catalyst layer, and the other is a cathode catalyst layer.

In one embodiment, the coating device comprises a coating roller and a coating head, the proton exchange membrane or the two-in-one material belt can pass through the coating roller, and the coating head can carry out catalyst coating on the proton exchange membrane or the two-in-one material belt passing through the coating roller.

In one embodiment, the surface of the applicator roll is operable to generate a negative pressure to adhere the side of the two-in-one strip of material facing away from the second side to the surface of the applicator roll.

In one embodiment, the second drying device has a heating surface in a circular arc shape, the heating surface facing the coating roller and extending in a circumferential direction of the coating roller.

In one embodiment, the coating roll is a heated roll.

In one embodiment, the first drying device is an elongated oven, and the two-in-one material belt output by the coating device can pass through the oven to dry the first catalyst layer.

In one embodiment, the film stripping device comprises a stripping roller and a receiving roller, the two-in-one material belt can wind through the stripping roller and separate the protective film material belt from the second surface, and the receiving roller is used for winding the protective film material belt.

In one embodiment, the CCM material belt supporting device further comprises a film covering device which is used for covering any surface of the CCM material belt with a supporting film belt.

In one embodiment, the film laminating device comprises a compression roller and an unwinding shaft, the compression roller is arranged on the second coating line, and the support film material belt unwound by the unwinding shaft can be wound by the compression roller and is compounded with the CCM material belt wound by the compression roller.

In one embodiment, the first coating line and the second coating line are further provided with at least one of a static electricity eliminator, a tension control device, a deviation correction device, a traction device and a tape connecting device, wherein the static electricity eliminator can eliminate static electricity carried by passing tapes, the tension control device can keep the passing tapes tensioned, the deviation correction device can correct the passing tapes, and the traction device can provide traction force for the passing tapes.

According to the proton exchange membrane coating device, the proton exchange membrane can firstly move along the first coating route to realize the coating of the first catalyst layer, so that the two-in-one material belt is obtained. After the two-in-one material belt is rolled by the rolling device, the two-in-one material belt can be transferred to the unwinding device to be unwound. The two-in-one material belt unreeled by the unreeling device can move along a second coating route to realize coating of the second catalyst layer, so that the CCM material belt is obtained. The first drying device and the second drying device can meet the drying requirements of two different catalyst layers respectively. Moreover, the unwinding device, the coating device and the winding device are shared by the first coating route and the second route, so that compared with the two traditional devices, the proton exchange membrane coating device realizes double-sided coating, and is smaller in size and more compact in structure.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a proton exchange membrane coating apparatus according to a preferred embodiment of the present invention;

FIG. 2 is a schematic illustration of a first coating path in the PEM coating apparatus shown in FIG. 1;

FIG. 3 is a schematic illustration of a second coating path in the PEM coating apparatus shown in FIG. 1;

FIG. 4 is a front view of the two-in-one tape prepared by the PEM coating apparatus shown in FIG. 1;

FIG. 5 is a front view of a CCM tape prepared by the PEM coating apparatus shown in FIG. 1.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3, a proton exchange membrane coating apparatus 10 according to a preferred embodiment of the present invention includes an unwinding device 11, a coating device 12, a first drying device 13, a second drying device 14, a winding device 15, and a membrane peeling device 16.

The proton exchange membrane coating apparatus 10 is formed with a first coating route and a second coating route, and the proton exchange membrane 100 can be coated with a catalyst on both the first coating route and the second coating route. Wherein, the first coating route is provided with an unreeling device 11, a coating device 12, a first drying device 13 and a reeling device 15; the second route is provided with an unreeling device 11, a coating device 12, a second drying device 14 and a reeling device 15. It can be seen that the first coating route and the second coating route can share part of the devices, such as the unwinding device 11, the coating device 12, and the winding device 15. As such, the first coating route and the second coating route cannot simultaneously perform catalyst coating on the proton exchange membrane 100.

The proton exchange membrane 100 has a first surface and a second surface opposite to the first surface, and the second surface is covered with a protective film material strip 110. During the preparation of the CCM module, the proton exchange membrane 100 firstly travels along the first coating route, the coating device 12 coats the first catalyst layer 310 on the first surface to obtain the two-in-one material tape 200 (see fig. 4), and then the two-in-one material tape 200 is dried by the first drying device 13 and then wound by the winding device 15; the two-in-one material belt 200 wound into a coil can be transferred to the unwinding device 11 by manual operation; then, the two-in-one strip 200 unwound by the unwinding device 11 will travel along the second coating route, the coating device 12 coats the second catalyst layer 320 on the second surface of the proton exchange membrane 100, so as to obtain the CCM strip 300 (see fig. 5), the CCM strip 300 thus obtained is wound by the winding device 15, and the wound CCM strip 300 can be stored in a roll form so as to be conveniently used in the preparation of the fuel cell.

One of the first catalyst layer 310 and the second catalyst layer 320 is an anode catalyst layer, and the other is a cathode catalyst layer. Specifically, in the present embodiment, the first catalyst layer 310 is a cathode catalyst layer, and the second catalyst layer 320 is an anode catalyst layer. The coating device 12 can switch the type of catalyst that is output to coat and form different types of catalyst layers. Specifically, the first coating line operates with the coating device 12 outputting a cathode catalyst, while the second coating line operates with the coating device 12 outputting an anode catalyst.

Both the first drying device 13 and the second drying device 14 can heat and dry the catalyst layer. In addition, the first drying device 13 and the second drying device 14 adopt different heating methods to adapt to different types of catalyst layers.

Referring to fig. 2 again, when coating the first catalyst layer 310, i.e. the cathode catalyst layer, the proton exchange membrane 100 unreeled by the unreeling device 11 can enter the coating device 12 after being guided by a plurality of rollers (not shown); the coating device 12 can coat the first catalyst layer 310 on the first side of the proton exchange membrane 100 to obtain the two-in-one material tape 200. The coating device 12 may be a slot direct coating. Specifically, in the present embodiment, the coating device 12 includes a coating roll 121 and a coating head 122, and the proton exchange membrane 100 can be coated with the catalyst around the proton exchange membrane 100 passing through the coating roll 121 and the coating head 122 around the coating roll 121. The proton exchange membrane 100 can be well spread on the surface of the coating roller 121, thereby ensuring the coating quality.

In addition, since the second surface of the proton exchange membrane 100 is covered with the protective film material strip 110, and the bonding force between the protective film material strip 110 and the proton exchange membrane 100 can effectively inhibit the swelling phenomenon of the proton exchange membrane 100 during the coating process, the deformation amount of the proton exchange membrane 100 can be controlled within a reasonable range, thereby ensuring the coating accuracy of the first catalyst layer 310.

The coated two-in-one material tape 200 can enter the first drying device 13 after being guided by a plurality of rollers (not shown), and the first drying device 13 can dry the first catalyst layer 310. Specifically, in the embodiment, the first drying device 13 is a strip-shaped oven, and the two-in-one material tape 200 output by the coating device 12 can pass through the oven to dry the first catalyst layer 310. The oven can provide a relatively confined environment, and drying effect is better and controllable, is applicable to drying the cathode catalyst layer.

In addition, the first coating line is further provided with at least one of a static eliminator 17, a tension control device 18, a deviation correcting device, a traction device 20 and a belt splicing device 23. Wherein:

the electric eliminator 17 can eliminate static electricity carried by the passing material belt, thereby avoiding warping or loosening caused by electrostatic repulsion during winding. The tension control device 18 is capable of maintaining tension in the passing strip of material. Specifically, the tension control device 18 includes a tension roller 181 and a swing roller 182, the tension roller 181 can tighten the material belt, and the swing roller 182 can release or buffer the material belt, so that the material belt maintains a relatively stable tension. The deviation correcting device comprises an unreeling deviation correcting device 191 and a process deviation correcting device 192, and can correct the deviation of the material belt so as to ensure the consistency of the tape running. The traction device 20 may be a drive roller capable of providing traction to the passing strip of material. The splicing device 23 can connect two lengths of material strips so as to ensure that the device can operate continuously.

For example, in the embodiment, the tension roller 181, the unwinding deviation rectifying device 191 and the belt splicing device 23 are disposed between the unwinding device 11 and the coating device 12, so that the proton exchange membrane 100 can be tensioned and the uniformity of the belt running can be ensured when entering the coating device 12. Between the first drying device 13 and the winding device 15, there are an electrostatic eliminator 17, a process deviation rectifying device 192, a tension roller 181, a swing roller 182, a traction device 20 and a belt splicing device 23.

Referring to fig. 3 again, when coating the second catalyst layer 320, i.e., the anode catalyst layer, the two-in-one material tape 200 wound on the winding device 15 is first transferred to the unwinding device 11, and then is unwound by the unwinding device 11, where the unwinding process of the two-in-one material tape 200 is the same as the unwinding process of the proton exchange membrane 100. Before the two-in-one tape 200 enters the coating device 12, the peeling device 16 is further required to tear off the protective film tape 110 on the second side of the proton exchange membrane 100 to expose the second side.

Specifically, in the embodiment, the film stripping device 16 includes a stripping roller 161 and a material receiving roller 162, the two-in-one material tape 200 can be wound around the stripping roller 161 to separate the protective film material tape 110 from the second surface, and the material receiving roller 162 is used for receiving the protective film material tape 110. The peeling roller 161 is arranged on one side of the coating roller 121, and the two-in-one tape 200 passes through the peeling roller 161 and then winds around the coating roller 121, so that the peeling roller 161 can also be used as a feeding pressing roller, and the two-in-one tape 200 can be reliably adhered to the surface of the coating roller 121.

The protective film tape 110 is wound around the peeling roller 161 and then drawn by the material receiving roller 162, and the advancing direction of the protective film tape 110 is significantly changed compared with the proton exchange membrane 100, so that a peeling angle is generated between the protective film tape 110 and the proton exchange membrane 100, and the protective film tape 110 can be torn off from the second surface by continuously rolling the material receiving roller 162.

After the second side of the proton exchange membrane 100 is exposed, the coating apparatus 12 can coat the second catalyst layer 310 on the second side of the proton exchange membrane 100 to obtain the CCM carrier tape 300. The CCM carrier tape 300 is dried by the second drying device 14, so that the second catalyst layer 310 is dried and can be wound by the winding device 15.

Specifically, in this embodiment, a visual positioning device 21 is disposed between the unwinding device 11 and the coating device 12, and the visual positioning device 21 may be a CCD camera. In the process of unwinding the two-in-one tape 200, the visual positioning device 21 can detect and position the area of the first catalyst layer 310 coated on the first surface of the proton exchange membrane 100. Thus, the second catalyst layer 320 is conveniently aligned with the first catalyst layer 310 during the second coating, so as to ensure the alignment of the catalyst layers on both sides of the proton exchange membrane 100.

Since the protective film tape 110 on the second surface of the proton exchange membrane 100 needs to be torn off before the second coating, the proton exchange membrane 100 may swell significantly during the second coating, which may reduce the coating precision and affect the quality of the CCM tape 300.

To solve this problem, in the present embodiment, the surface of the coating roller 121 can be operable to generate a negative pressure to adhere the side of the two-in-one tape 200 facing away from the second side to the surface of the coating roller 121.

Specifically, the coating roll 121 may be a hollow structure, the surface of which is provided with a plurality of adsorption holes (not shown), and the interior of the coating roll 121 may be communicated with a vacuum extractor (not shown) through an air connector and a control valve. When the first coating is performed, the control valve or the vacuum pumping means may be closed without forming a negative pressure on the surface of the coating roller 121; when the second coating is performed, the control valve and the vacuum pumping device are opened to form a negative pressure on the surface of the coating roller 121, so that the two-in-one tape 200 wound around the coating roller 121 is sucked.

In this way, when the coating head 122 coats the second catalyst layer 310 on the second surface of the proton exchange membrane 100, the surface of the coating roller 121 can provide an adsorption force to the proton exchange membrane 100, and thus the swelling phenomenon of the proton exchange membrane 100 can be effectively suppressed.

Further, in the present embodiment, the second drying device 14 has a heating surface in a circular arc shape, the heating surface facing the coating roller 121 and extending in the circumferential direction of the coating roller 121.

The second drying device 14 may be a drying air box or an infrared heater, and the heating surface may heat the surface of the coating roller 121 by blowing hot air or infrared radiation. Since the CCM web 300 that has been coated passes around the coating roller 121, the extending direction of the heating surface coincides with the extending direction of the CCM web 300 that has just been coated on the coating roller 121. Therefore, the second drying device 14 can start the drying operation of the second catalyst layer 320 in the process of the second coating, so as to significantly accelerate the drying speed of the second catalyst layer 320, and further to suppress the swelling of the proton exchange membrane 100 to a certain extent.

Further, in the present embodiment, the coating roller 121 is a heating roller. Therefore, the coating roller 121 cooperates with the second drying device 14 to heat the CCM carrier tape 300 from the inner side and the outer side simultaneously, so that the drying speed of the second catalyst layer 320 can be further increased. Moreover, simultaneous heating from both sides also enables and improves the uniformity of drying.

Note that, when the first coating is performed, both the coating roller 121 and the second drying device 14 may not be activated. Moreover, the second drying device 14 is further provided with a gap (not shown) through which only the two-in-one material tape 200 moving along the first coating route passes.

In order to avoid the damage of the catalyst layer caused by the CCM carrier tape 300 during the rolling and storage processes, in this embodiment, the proton exchange membrane coating apparatus 10 further includes a film coating device for coating a support film carrier tape (not shown) on any surface of the CCM carrier tape 300. So, at the in-process with CCM material area 300 rolling, adjacent two-layer catalyst layer will not directly take place the contact to can avoid the catalyst layer impaired. The material of the support film tape is generally the same as that of the protection film tape 110, and may be PET, PC, or the like.

Further, in this embodiment, the laminating device includes a pressing roller 221 and an unwinding roller 222, the pressing roller 221 is disposed on the second coating line, and the support film tape unwound by the unwinding roller 222 can be wound around the pressing roller 221 and combined with the CCM tape 300 wound around the pressing roller 221. The pressing roller 221 is disposed near the coating roller 121, and the CCM tape 300 output from the coating device 12 can pass around the pressing roller 221. The pressing roller 221 can also be used as a discharging pressing roller of the coating roller 121, and the CCM material strip 300 is pressed against the surface of the coating roller 121.

Similarly, the first coating line is further provided with at least one of a static eliminator 17, a tension control device 18, a deviation correcting device, a traction device 20 and a belt splicing device 23.

For example, a tension roller 181 and a belt splicing device 23 are provided between the coating device 12 and the winding device 15. Further, an electrostatic eliminator 17 and a tension roller 181 are provided between the pressure roller 221 and the unwinding shaft 222, and an electrostatic eliminator 17 and a tension roller 181 are provided between the peeling roller 161 and the take-up roller 162.

In the proton exchange membrane coating apparatus 10, the proton exchange membrane 100 may first travel along the first coating route to coat the first catalyst layer 310, so as to obtain the two-in-one material tape 200. After being wound by the winding device 15, the two-in-one material tape 200 can be transferred to the unwinding device 11 for unwinding. The two-in-one material tape 200 unwound by the unwinding device 11 may travel along a second coating route to coat the second catalyst layer 310, so as to obtain the CCM material tape 300. The first drying device 13 and the second drying device 14 can respectively satisfy the drying requirements of two different catalyst layers. Moreover, since the unwinding device 11, the coating device 12, and the winding device 15 are shared by the first coating route and the second route, the proton exchange membrane coating apparatus 10 has a smaller volume and a more compact structure while realizing double-sided coating compared with the conventional two apparatuses.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The proton exchange membrane coating equipment is characterized by comprising an unreeling device, a coating device, a first drying device, a second drying device, a reeling device and a membrane peeling device, wherein a first coating route and a second coating route are formed on the proton exchange membrane coating equipment;

the second coating route is provided with the unreeling device, the coating device, the second drying device and the reeling device, the two-in-one material belt unreeled by the unreeling device can move along the second coating route, the membrane peeling device tears off the protective film material belt on the second surface of the proton exchange membrane, the coating device can coat a second catalyst layer on the second surface of the proton exchange membrane to prepare a CCM material belt, the reeling device can reel the CCM material belt, one of the first catalyst layer and the second catalyst layer is an anode catalyst layer, and the other is a cathode catalyst layer.

2. The pem coating apparatus of claim 1 wherein said coating means comprises a coating roll around which said pem or said two-in-one web can be passed and a coating head capable of applying a catalyst to said pem or said two-in-one web passed around said coating roll.

3. The pem coating apparatus of claim 2 wherein the surface of the applicator roll is operable to generate a negative pressure to attract the side of the two-in-one strip facing away from the second side to the surface of the applicator roll.

4. The pem coating apparatus of claim 2 wherein said second drying device has a heating surface in the shape of a circular arc, said heating surface facing said coating roll and extending in the circumferential direction of said coating roll.

5. The proton exchange membrane coating apparatus of claim 4, wherein the coating roll is a heated roll.

6. The pem coating apparatus of claim 1 wherein said first drying device is an elongated oven through which said two-in-one strip of material output by said coating device can pass to dry said first catalyst layer.

7. The pem coating apparatus of claim 1, wherein the membrane peeling device comprises a peeling roller and a material receiving roller, the two-in-one material belt can be wound around the peeling roller and separate the protective film material belt from the second surface, and the material receiving roller is used for winding the protective film material belt.

8. The pem coating apparatus of claim 1 further comprising a coating device for coating either surface of said CCM web with a support web.

9. The pem coating apparatus of claim 8, wherein said coating device comprises a pressing roller and an unwinding roller, said pressing roller is disposed on said second coating line, and said support membrane material strip unwound by said unwinding roller can be wound around said pressing roller and combined with said CCM material strip wound around said pressing roller.

10. The pem coating apparatus of claim 1 wherein the first coating line and the second coating line are further provided with at least one of an electrostatic eliminator, a tension control device, a deviation correction device, a traction device and a belt receiving device, wherein the electrostatic eliminator can eliminate static electricity on passing belts, the tension control device can keep the passing belts tensioned, the deviation correction device can correct the passing belts, and the traction device can provide traction force for the passing belts.

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