CN215283404U

CN215283404U - Membrane electrode hot pressing laminating fixture

Info

Publication number: CN215283404U
Application number: CN202120251171.7U
Authority: CN
Inventors: 刘培淳; 曾黎; 汪圣龙; 刘坤; 蒋中林; 华周发
Original assignee: Hubei Mofang New Energy Technology Co ltd
Current assignee: Hubei Mofang New Energy Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-12-24
Anticipated expiration: 2031-01-29

Abstract

The utility model belongs to the technical field of fuel cell, especially, relate to a membrane electrode hot pressing laminating anchor clamps, include: a first platen; the second pressing plate is used for bearing the membrane electrode and frames arranged on the two surfaces of the membrane electrode; the middle of the first pressing plate and/or the second pressing plate is a hollow area, and a heat insulation layer is arranged in the hollow area. The utility model discloses a hot pressing laminating anchor clamps are used for laminating frame and membrane electrode hot pressing, set up at the shape of first clamp plate and second clamp plate and the shape phase-match of frame. The utility model discloses be provided with the insulating layer in the fretwork district in the middle of first clamp plate and second clamp plate, the insulating layer can prevent the heat radiation to the proton exchange membrane's in the middle of the membrane electrode surface with the heat separation of first clamp plate and second clamp plate, and the proton exchange membrane who has avoided the catalyst layer to cover produces the thermal deformation.

Description

Membrane electrode hot pressing laminating fixture

Technical Field

The utility model belongs to the technical field of fuel cell, especially, relate to a membrane electrode hot pressing laminating anchor clamps.

Background

Proton Exchange Membrane Fuel Cells (PEMFCs) are an important branch of fuel cells, and gradually become the mainstream in fuel cell research due to their characteristics of quick start, capability of operating at room temperature, no electrolyte outflow, small weight, high specific power, no environmental pollution, and wide application.

The Membrane Electrode Assembly (MEA) provides continuous channels of protons, electrons, reaction gas and water for the electrochemical reaction of the proton exchange membrane fuel cell, is a key part of the proton exchange membrane fuel cell for realizing the conversion of chemical energy and electric energy, and directly influences the performance exertion of the proton exchange membrane on the performance of the proton exchange membrane.

The Catalyst Coated Membrane (CCM) is a technology for preparing a Membrane electrode by directly acting a Catalyst on a proton exchange Membrane without hot pressing, and can improve the utilization rate and proton conductivity of the Catalyst and further reduce the loading amount of Catalyst Pt.

In the prior art, the five-in-one packaging of the membrane electrode is to clamp the CCM three-in-one membrane electrode and two frames on two layers of metal plates and then put the membrane electrode and the two frames on a hot press or a flat press to be laminated at high temperature and flat pressure. However, because the metal plate has good heat conductivity, a closed space is formed by the metal plate and the upper and lower pressing plates of the hot press when the metal plate is flatly pressed and attached at a high temperature, the metal plate can absorb a part of heat when the metal plate is attached at the high temperature, and the heat is transferred to the proton exchange membrane to cause the proton exchange membrane to deform. In addition, the flat pressing and attaching mode has the defects of poor appearance effect, long flat pressing and attaching time and low production efficiency due to the difficult attaching and exhausting, extremely high requirements on the flatness and parallelism processing precision of the metal plate.

In view of the above, it is necessary to provide a technical solution to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model lies in: the hot-pressing laminating fixture for the membrane electrode is provided for overcoming the defects in the prior art, and solves the problem that a proton exchange membrane is deformed due to heating.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a membrane electrode hot-pressing attaching clamp comprises:

a first platen;

the second pressing plate is used for bearing the membrane electrode and frames arranged on the two surfaces of the membrane electrode;

the middle of the first pressing plate and/or the second pressing plate is a hollow area, and a heat insulation layer is arranged in the hollow area.

As an improvement of the membrane electrode hot-pressing laminating fixture, the heat-insulating layer comprises a glass fiber layer, an asbestos layer, a rock wool layer or a silicate layer. The material of the heat insulation layer is not particularly set as long as the heat of the first pressing plate and the second pressing plate can be insulated from being conducted to the proton exchange membrane.

As an improvement of membrane electrode hot pressing laminating anchor clamps, first clamp plate and/or the exhaust duct has been seted up on the surface of second clamp plate, the exhaust duct is followed first clamp plate and/or the inboard of second clamp plate extends to the outside. When hot pressing, the in-process that first clamp plate pushed down to the second clamp plate has partial air to diffusion all around, and frame and proton exchange membrane are under the hot pressing of the first clamp plate of high temperature and second clamp plate, and the quick encapsulation, the air probably remains between frame and proton exchange membrane, causes outward appearance encapsulation such as bubble bad. The utility model discloses the air discharge duct that sets up can be at the in-process that first clamp plate pushed down to the second clamp plate, and is driven out the air along the air discharge duct, prevents that the air from remaining between frame and proton exchange membrane and the bubble outward appearance that causes is bad.

As an improvement of the membrane electrode hot-pressing laminating fixture of the present invention, the exhaust groove is formed on the upper surface of the first pressing plate; and/or the exhaust groove is formed in the lower surface of the second pressing plate. So set up, the in-process that first clamp plate pushed down to the second clamp plate, the air can be along the upper surface of first clamp plate to the outdiffusion to and the outdiffusion along the lower surface of second clamp plate, thereby avoid the air to be detained between frame and proton exchange membrane, lead to producing the bubble between frame and the proton exchange membrane, avoid the appearance defect that the bubble produced.

As an improvement of the membrane electrode hot-pressing laminating fixture, the membrane electrode hot-pressing laminating fixture further comprises a buffer layer, wherein the buffer layer is arranged between the first pressing plate and the second pressing plate. Because the surface of first clamp plate and second clamp plate may have the unevenness that the naked eye is difficult to see, the place of unevenness can't laminate frame and proton exchange membrane hot pressing when the hot pressing, and hot pressing pressure is inhomogeneous, the utility model discloses the buffer layer that sets up has certain elasticity, through the direct and frame contact of buffer layer, can be so that frame and proton exchange membrane laminate better, avoid because of the appearance defect of the inhomogeneous production of pressure.

As an improvement of the membrane electrode hot-pressing attaching clamp of the present invention, the buffer layer is disposed on the lower surface of the first pressing plate and/or the upper surface of the second pressing plate.

As an improvement of the membrane electrode hot-pressing laminating fixture, the buffer layer comprises a silica gel layer, a polytetrafluoroethylene layer, a fluororubber layer or a rubber layer.

As an improvement of the membrane electrode hot-pressing laminating fixture, the first pressing plate and the second pressing plate are both set to be metal plates.

As an improvement of membrane electrode hot pressing laminating anchor clamps, the membrane electrode includes proton exchange membrane, sets up the catalyst layer on proton exchange membrane two surfaces, the fretwork region with the shape phase-match setting of catalyst layer.

As a membrane electrode hot pressing laminating anchor clamps a improvement, the surface of second clamp plate is provided with the reference column, the surface of first clamp plate seted up with the counterpoint hole that the setting was matchd to the setting. The counterpoint hole can counterpoint, laminate first clamp plate accurately with the second clamp plate, has improved the counterpoint precision.

Compared with the prior art, the utility model discloses following beneficial effect has at least: the utility model provides a membrane electrode hot pressing laminating anchor clamps, include: a first platen; the second pressing plate is used for bearing the membrane electrode and frames arranged on the two surfaces of the membrane electrode; the middle of the first pressing plate and/or the second pressing plate is a hollow area, and a heat insulation layer is arranged in the hollow area. The utility model discloses a hot pressing laminating anchor clamps are used for laminating frame and membrane electrode hot pressing, and the shape of first clamp plate and second clamp plate and the shape phase-match of frame set up, and frame and membrane electrode need be laminated at the hot pressing under the temperature of 130 degrees centigrade usually, however, when the temperature exceeded 80 degrees centigrade, proton exchange membrane will take place irreversible deformation, takes place to warp in order to avoid the proton exchange membrane that the catalyst layer covered, need be isolated with the heat of first clamp plate and second clamp plate. The utility model discloses be provided with the insulating layer in the fretwork district in the middle of first clamp plate and second clamp plate, the insulating layer can prevent the heat radiation to the proton exchange membrane's in the middle of the membrane electrode surface with the heat separation of first clamp plate and second clamp plate, and the proton exchange membrane who has avoided the catalyst layer to cover produces the thermal deformation.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a frame.

FIG. 3 is a top view of a five-in-one membrane electrode.

Fig. 4 is a cross-sectional view of a five-in-one membrane electrode.

The device comprises a base, a first pressing plate, a second pressing plate, a heat insulation layer, a 4-exhaust groove, a 5-buffer layer, a 61-positioning column and a 62-positioning hole, wherein the base comprises a base plate and a base plate;

10-proton exchange membrane, 20-catalyst layer, 30-frame.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

Examples

As shown in fig. 1 to 4, the present embodiment provides a membrane electrode hot-pressing attaching clamp, which includes:

a first platen 1;

the second pressing plate 2 is used for bearing the membrane electrode and frames 30 arranged on two surfaces of the membrane electrode;

the middle of the first pressing plate 1 and/or the second pressing plate 2 is a hollow area, and a heat insulation layer 3 is arranged in the hollow area.

Further, the heat insulating layer 3 includes a glass fiber layer, an asbestos layer, a rock wool layer, or a silicate layer. The material of the heat insulating layer 3 is not particularly limited as long as it can insulate the heat of the first and

second press plates

1 and 2 from being conducted to the proton exchange membrane 10.

Further, the surface of the first pressing plate 1 and/or the second pressing plate 2 is provided with an exhaust groove 4, and the exhaust groove 4 extends outwards along the inner side of the first pressing plate 1 and/or the second pressing plate 2. During hot pressing, in the process that the first pressing plate 1 is pressed down to the second pressing plate 2, part of air diffuses to the periphery, the frame 30 and the proton exchange membrane 10 are rapidly packaged under the hot pressing of the first pressing plate 1 and the second pressing plate 2 at high temperature, and air may remain between the frame 30 and the proton exchange membrane 10, so that poor package of appearances such as bubbles is caused. The utility model discloses the air discharge duct 4 that sets up can be at the in-process that first clamp plate 1 pushed down to second clamp plate 2, with the air along air discharge duct 4 catch up out, prevent that the air from remaining between frame 30 and proton exchange membrane 10 and the bubble outward appearance that causes is bad.

Further, an exhaust groove 4 is formed in the upper surface of the first pressing plate 1; and/or the air discharge grooves 4 are opened in the lower surface of the second presser plate 2. So set up, the in-process that first clamp plate 1 pushed down to second clamp plate 2, the air can be along the upper surface of first clamp plate 1 outwards diffusion to and along the lower surface outwards diffusion of second clamp plate 2, thereby avoid the air to stay between frame 30 and proton exchange membrane 10, lead to producing the bubble between frame 30 and the proton exchange membrane 10, avoid the appearance defect that the bubble produced.

Further, the buffer layer 5 is further included, and the buffer layer 5 is arranged between the first pressing plate 1 and the second pressing plate 2. Because the surface of first clamp plate 1 and second clamp plate 2 may have the unevenness that the naked eye is difficult to see, the place of unevenness can't laminate frame 30 and proton exchange membrane 10 hot pressing when the hot pressing, and hot pressing pressure is inhomogeneous, the utility model discloses the buffer layer 5 that sets up has certain elasticity, directly contacts with frame 30 through buffer layer 5, can make frame 30 and proton exchange membrane 10 laminate better, avoids because of the appearance imperfections of the inhomogeneous production of pressure.

Further, the buffer layer 5 is provided on the lower surface of the first press plate 1 and/or the upper surface of the second press plate 2.

Further, the buffer layer 5 includes a silicone gel layer.

Further, the first pressing plate 1 and the second pressing plate 2 are both provided as metal plates.

Further, the membrane electrode comprises a proton exchange membrane 10 and catalyst layers 20 arranged on two surfaces of the proton exchange membrane 10, and the hollow area is matched with the catalyst layers 20 in shape.

Furthermore, a positioning column 61 is disposed on the surface of the second pressing plate 2, and a positioning hole 62 matched with the fixed position is disposed on the surface of the first pressing plate 1. The counterpoint hole 62 can counterpoint, laminate first clamp plate 1 with second clamp plate 2 accurately, has improved the counterpoint precision.

The utility model discloses a working process does: the cathode frame 30, the three-in-one membrane electrode and the anode frame 30 are sequentially stacked and then placed on the second pressing plate 2, the first pressing plate 1 is pressed downwards, and the frame 30 and the proton exchange membrane 10 are attached in a hot pressing mode.

The utility model discloses a hot pressing laminating anchor clamps are used for laminating frame 30 and membrane electrode hot pressing, and shape at first clamp plate 1 and second clamp plate 2 and frame 30's shape phase-match setting, and frame 30 and membrane electrode need be laminated at the hot pressing under the temperature of 130 degrees centigrade usually, however, when the temperature surpassed 80 degrees centigrade, proton exchange membrane 10 will take place irreversible deformation, and the proton exchange membrane 10 in order to avoid catalyst layer 20 to cover takes place to warp, need be isolated with first clamp plate 1 and second clamp plate 2's heat. The utility model discloses be provided with insulating layer 3 in the fretwork district in the middle of first clamp plate 1 and second clamp plate 2, insulating layer 3 can prevent the surface of proton exchange membrane 10 in the middle of the heat radiation to membrane electrode with the heat separation of first clamp plate 1 and second clamp plate 2, has avoided proton exchange membrane 10 that catalyst layer 20 covered to produce the thermal deformation.

Additionally, the utility model discloses there is air discharge duct 4 respectively at the top surface of first clamp plate 1 and the back of second clamp plate 2, sets up buffer layer 5 between first clamp plate 1 and the second clamp plate 2, and these two beneficial points are obvious to the concora crush homogeneity and the aspect effect of exhausting when the laminating of product hot pressing, play obvious effect to the improvement of product goodness.

Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides a membrane electrode hot pressing laminating anchor clamps which characterized in that includes:

a first platen;

2. A membrane electrode hot press fit jig according to claim 1, wherein the heat insulating layer comprises a glass fiber layer, an asbestos layer, a rock wool layer, or a silicate layer.

3. A membrane electrode hot pressing fit clamp according to claim 1, wherein the surface of the first and/or second pressure plate is provided with an air vent groove, and the air vent groove extends along the inner side of the first and/or second pressure plate to the outer side.

4. A membrane electrode hot press fit jig according to claim 3, wherein the vent groove is provided on the upper surface of the first pressure plate; and/or the exhaust groove is formed in the lower surface of the second pressing plate.

5. A membrane electrode hot press fit jig according to claim 1, further comprising a buffer layer provided between the first and second press plates.

6. A membrane electrode hot press fit jig according to claim 5, characterised in that the buffer layer is provided on the lower surface of the first platen and/or the upper surface of the second platen.

7. A membrane electrode hot-pressing fit clamp according to claim 5, wherein the buffer layer comprises a silicone rubber layer, a polytetrafluoroethylene layer, a fluororubber layer or a rubber layer.

8. A membrane electrode hot press fit jig according to claim 1, wherein the first and second pressure plates are each provided as a metal plate.

9. A membrane electrode hot-pressing attaching clamp according to claim 1, wherein the membrane electrode comprises a proton exchange membrane and catalyst layers arranged on two surfaces of the proton exchange membrane, and the hollow area is matched with the catalyst layers in shape.

10. The membrane electrode hot-pressing attaching clamp according to claim 1, wherein a positioning column is arranged on the surface of the second pressing plate, and a positioning hole matched with the positioning position is formed in the surface of the first pressing plate.