WO2022151847A1

WO2022151847A1 - Method and system for preparing proton exchange sealing membrane of fuel cell

Info

Publication number: WO2022151847A1
Application number: PCT/CN2021/133640
Authority: WO
Inventors: 叶爱磊; 戴玮洁; 韩仲友; 谈纪金; 祁浩; 周枫韵
Original assignee: 苏州泰仑电子材料有限公司
Priority date: 2021-01-15
Filing date: 2021-11-26
Publication date: 2022-07-21
Also published as: CN112909289A

Abstract

The present invention relates to a method and system for preparing a proton exchange sealing membrane of a fuel cell, comprising: a base membrane supply unit used for supplying and conveying a proton exchange membrane to a bonding unit; a glue layer supply unit used for supplying and conveying a sealing glue layer to the bonding unit, the glue layer supply unit being provided with a die-cutting machine to form a central hollow part of the sealing glue layer, the glue layer supply unit comprising a first glue layer supply unit and a second glue layer supply unit for providing a first sealing glue layer bonded to the upper surface of the proton exchange membrane and a second sealing glue layer bonded to the lower surface of the proton exchange membrane; and the bonding unit used for bonding the first sealing glue layer and the second sealing glue layer to the upper surface and lower surface of the proton exchange membrane to form a proton exchange sealing membrane. The length of the sealing glue layer in the transverse direction is greater than that of the proton exchange membrane, and after being bonded, the sealing glue layer seals transverse edges of the proton exchange membrane, such that the usage cost of the proton exchange membrane is reduced, and the sealing property of the proton exchange membrane and the safety of a membrane electrode are improved.

Description

A method and system for preparing a fuel cell proton exchange sealing membrane

technical field

The invention relates to the field of proton exchange membranes of fuel cells, in particular to a system and method for preparing proton exchange sealing membranes of fuel cells.

Background technique

Proton exchange membrane fuel cell (PEMFC) is a chemical device that directly converts the chemical energy of fuel into electrical energy. It uses fuel and oxygen as raw materials. It has high energy conversion efficiency, no noise, and no pollution. It can become an electric vehicle. The membrane electrode is the core component of the fuel cell and the fundamental source of power for the fuel cell. Its cost accounts for 70% of the fuel cell stack and 35% of the fuel cell power system. The performance and durability of the membrane electrode are directly determined. The core of the membrane electrode is the proton exchange membrane, which is a solid polymer membrane that isolates electrons but can conduct hydrogen protons. It has excellent proton conductivity, chemical stability and Mechanical properties: In the continuous production process, generally after the catalyst and gas diffusion layer are coated on the surface of the proton exchange membrane, the sealing material is used to seal around the proton exchange membrane to form a membrane electrode. After sealing, only the unsealed surface center of the proton exchange membrane The area is used as the active area of the membrane electrode, which often results in waste of the proton exchange membrane; at the same time, the transportation of the surrounding area of the proton exchange membrane during production will also be damaged, and the protection and pre-sealing of the proton exchange membrane are often neglected. How to continuously form the protection and sealing of proton exchange membranes in production has become a problem that needs to be improved.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the purpose of the present invention is to provide a system and method for preparing a fuel cell proton exchange sealing membrane.

The technical scheme of the present invention is summarized as follows:

The present invention provides a fuel cell proton exchange sealing membrane preparation system, comprising:

A base membrane supply unit for supplying the proton exchange membrane and transporting it to the bonding unit;

The adhesive layer supply unit is used to supply the sealant layer and transmit it to the adhesive unit; the adhesive layer supply unit has a die-cutting machine for forming the central hollow part of the sealant layer; the adhesive layer supply unit includes a first an adhesive layer supply unit and a second adhesive layer supply unit to provide a first sealant layer for adhering to the upper surface of the proton exchange membrane and a second sealant layer for adhering to the lower surface of the proton exchange membrane;

a bonding unit, which bonds the first sealant layer and the second sealant layer to the upper surface and the lower surface of the proton exchange membrane to form a proton exchange sealing membrane;

The length of the sealant layer in the lateral direction is greater than that of the proton exchange membrane, so that after bonding, the sealant layer can seal the lateral edges of the proton exchange membrane in the lateral direction, and the first sealant layer and the second sealant layer have The lateral joint of the adhesive layer bonded to each other on the outside of the lateral edge.

Preferably, the adhesive layer supply unit includes an adhesive layer position sensor for acquiring the position information of the supplied sealant layer, including a first adhesive layer position sensor on the first adhesive layer supply unit and a second adhesive layer supply unit The second glue layer position sensor on the upper part is used to control the supply speed of the glue layer supply unit according to the obtained position information, so that the central hollow parts of the first and second sealant layers after bonding correspond to each other.

Preferably, the base membrane supply unit has a cutter to cut the proton exchange membrane in a longitudinal direction to form a proton exchange membrane sheet; the proton exchange membrane sheet is supplied to the bonding unit and the first sealant layer and the second sealant layer bonding; after bonding, the sealant layer can seal the longitudinal edge of the proton exchange membrane in the longitudinal direction, and the first sealant layer and the second sealant layer have a longitudinal joint of the adhesive layers bonded to each other on the outside of the longitudinal edge .

Preferably, the base film supply unit includes a base film position sensor for obtaining the position information of the supplied proton exchange sealing membrane; the adhesive layer supply unit includes a position sensor for obtaining the position information of the supplied sealant layer. Position information, including the first adhesive layer position sensor on the first adhesive layer supply unit and the second adhesive layer position sensor on the second adhesive layer supply unit; control the adhesive layer supply unit and the base film supply unit according to the acquired position information Supply speed; make the central hollow parts of the bonded first sealant layer and the second sealant layer correspond to each other, and are formed in the center of the proton exchange sealing membrane.

Preferably, the base film supply unit includes a base film unwinder for supplying the proton exchange membrane with the protective film, and a protective film rewinder for recycling the protective film.

Preferably, the sealant layer has a release film, and the adhesive layer supply unit includes an adhesive layer unwinder for supplying the sealant layer with the release film, and a release film rewinder for recycling the release film ; After the sealant layer is formed by a die-cutting machine to form a central hollow part, the release film is peeled off by a release film rewinder.

Preferably, a winding unit is also included for winding the proton exchange sealing membrane bonded by the bonding unit.

The invention also relates to a method for preparing a fuel cell proton exchange sealing membrane, comprising:

supplying the proton exchange membrane to the bonding unit;

After the sealant layer is die-cut to form the central hollow portion, it is supplied to the bonding unit; the sealant layer includes a first sealant layer and a second sealant layer;

Adhering the die-cut first sealant layer and the second sealant layer to the upper surface and the lower surface of the proton exchange membrane respectively to form a proton exchange sealing membrane;

Preferably, it also includes that the proton exchange membrane is cut in the longitudinal direction by a cutting machine to form a proton exchange membrane sheet, and then supplied to the bonding unit; after bonding, the sealant layer can seal the proton exchange membrane sheet longitudinally On the longitudinal edge of the upper longitudinal edge, the first sealant layer and the second sealant layer have a longitudinal joint portion of the adhesive layers bonded to each other on the outer side of the longitudinal edge.

Preferably, it also includes winding up the proton exchange sealing membrane bonded by the bonding unit.

Compared with the prior art, the beneficial effects of the present invention are:

The invention provides a system for preparing a fuel cell proton exchange sealing membrane, which simply and quickly completes the sealing and protection of the proton exchange membrane through the supply and bonding of the sealant layer and the proton exchange membrane, and the die-cutting center of the sealant layer is hollowed out. It can realize rapid continuous production and improve efficiency; in addition, a sealant layer is attached to the upper and lower surfaces of the proton exchange membrane to seal the proton exchange membrane, protect the proton exchange membrane, and make the proton exchange membrane. The exchange membrane will not damage the proton exchange membrane during use, for example, when moving and gripping the edge; it is hollowed out in the center of the sealant layer for coating the catalyst layer on the surface of the proton exchange membrane; it can be seen from the use of the proton exchange membrane that its The functional area is the area that is attached to the catalyst layer. In the prior art, the entire proton exchange membrane is used, and the proton exchange membrane is used as a non-functional area to participate in subsequent sealing, which wastes the proton exchange membrane. The sealant layer of the present invention is used in continuous production. The lateral dimension is larger than that of the proton exchange membrane, and the adhesive layer of the first sealant layer and the second sealant layer on the outside of the lateral edge forms a lateral joint to provide support, and it has more adaptability of sealing materials to The lateral joint can be used as a non-functional area to participate in subsequent sealing to form a 7-layer MEA, or directly spray a catalyst to form a 3-layer MEA, and attach a gas diffusion layer to form a 5-layer MEA. This lateral joint can be used as a seal for the proton exchange membrane; The proton exchange sealing membrane preparation system ensures the tightness of the prepared proton exchange sealing membrane. It can be used as the first step in the continuous production of membrane electrodes to form a proton exchange sealing membrane to realize the sealing protection of the proton exchange membrane. In order to improve the follow-up The safety of membrane electrode production, the reduction of the use cost of the proton exchange membrane, and the improvement of sealing performance provide guarantees to achieve the purpose of improving the efficiency of the fuel cell. Correspondingly, the preparation method of the proton exchange sealing membrane used in the above system also has the same beneficial effect.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, and implement it according to the content of the description, the preferred embodiments of the present invention are described in detail below with the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is the schematic flow chart of the proton exchange sealing membrane preparation system of the present invention;

2 is a schematic structural diagram of a proton exchange sealing membrane with a continuous proton exchange membrane of the present invention taken along a longitudinal interface;

3 is a schematic structural diagram of a proton exchange sealing membrane (excluding the first sealant layer) with a continuous proton exchange membrane of the present invention;

Fig. 4 is the proton exchange sealing membrane explosion structure schematic diagram of the present invention;

5 is a schematic structural diagram of a proton exchange sealing membrane with a proton exchange membrane of the present invention taken along a longitudinal interface;

6 is a schematic structural diagram of a proton exchange sealing membrane (excluding the first sealant layer) with a proton exchange membrane of the present invention;

Fig. 7 is the schematic flow chart of the preparation method of proton exchange sealing membrane of the present invention;

8 is another schematic flow chart of the preparation method of the proton exchange sealing membrane of the present invention;

FIG. 9 is a schematic diagram of the preparation system of the fuel cell proton exchange sealing membrane of the present invention.

Description of reference numbers:

1- The first glue layer supply unit; 11- The first glue layer unwinding machine; 12- The first glue layer die-cutting machine; 13- The first glue layer position sensor; 14- The first release film rewinder;

2- The second glue layer supply unit; 21- The second glue layer unwinding machine; 22- The second glue layer die-cutting machine; 23- The second glue layer position sensor; 24- The second release film rewinder;

3-base film supply unit; 31-base film unwinder; 32-protective film rewinder; 33-base film position sensor; 34-cutting machine;

4-bonding unit; 41-first bonding roll; 42-second bonding roll; 43-bonding inspection sensor;

5-winding unit;

6-Proton exchange sealing membrane;

7-proton exchange membrane; 73-edge of proton exchange membrane; 78-upper surface; 79-lower surface;

8-first sealant layer; 81-first sealant layer; 82-first adhesive layer; 83-first center hollow part;

9-Second sealant layer; 91-Second sealant layer; 92-Second adhesive layer; 93-Second center hollow part;

891-transverse joint; 892-longitudinal joint.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, and the foregoing and other objects, features, aspects and advantages of the present invention will become more apparent, so that those skilled in the art can implement them with reference to the description. In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to refer to the same or like parts. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the size from top to bottom, "width" corresponds to the size from left to right, and "depth" corresponds to the size from front to back. These relative terms are for convenience of description and are generally not intended to require a specific orientation. Terms referring to attachment, coupling, etc. (eg, "connected" and "attached") refer to the fixed or attached relationship, as well as the movable or rigid attachment or relationship of these structures to each other, directly or indirectly, through intervening structures, unless The other way is explicitly stated.

Next, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that, on the premise of no conflict, the embodiments or technical features described below can be combined arbitrarily to form new implementations. example. It should be understood that terms such as "having", "comprising" and "including" as used herein do not assign the presence or addition of one or more other elements or combinations thereof.

The present invention provides a fuel cell proton exchange sealing membrane preparation system, as shown in Figures 1, 4 and 9, comprising: a base membrane supply unit 3 for supplying the proton exchange membrane and transporting it to the bonding unit 4; unit for supplying the sealant layer and transferring it to the bonding unit 4; the glue layer supply unit has a die-cutting machine for forming the central hollow part of the sealant layer; the glue layer supply unit includes the first glue layer supply unit 1 and the second adhesive layer supply unit 2 to provide a first sealant layer 8 for adhering to the upper surface 78 of the proton exchange membrane and a second sealant layer 9 for adhering to the lower surface 79 of the proton exchange membrane; A sealant layer 8 and a second sealant layer 9 are bonded to the upper surface 78 and the lower surface 79 of the proton exchange membrane 7 to form the proton exchange sealing membrane 6; The length is greater than that of the proton exchange membrane 7, so that after bonding, the sealant layer can seal the lateral edges of the proton exchange membrane 7 in the lateral direction. The lateral joint of the adhesive layer; through the supply and bonding of the sealant layer and the proton exchange membrane, the sealing and protection of the proton exchange membrane can be simply and quickly completed, and the die-cut central hollow part of the sealant layer can be attached to the proton exchange membrane. Continuous operation, rapid continuous production, improve efficiency; in addition, sealant layers are attached to the upper and lower surfaces of the proton exchange membrane to seal the proton exchange membrane and protect the proton exchange membrane, so that the proton exchange membrane is in use, such as moving, clamping The proton exchange membrane will not be damaged at the edge; and the center of the sealant layer is hollowed out for the catalyst layer to be applied to the surface of the proton exchange membrane; from the use of the proton exchange membrane, its functional area is the area that is attached to the catalyst layer. , the prior art uses the entire proton exchange membrane, and the proton exchange membrane is used as a non-functional area to participate in subsequent sealing, which wastes the proton exchange membrane. The adhesive layer where the first sealant layer and the second sealant layer are adhered to each other forms a lateral joint, which provides support, and has more adaptability of sealing materials. The lateral joint is used as a non-functional area to participate in the subsequent sealing formation. 7-layer MEA, or directly spraying the catalyst to form 3-layer MEA, and laminating the gas diffusion layer to form 5-layer MEA, this lateral joint can be used as the seal of the proton exchange membrane; the final proton exchange sealing membrane preparation system ensures the prepared proton exchange membrane. The sealing property of the exchange sealing membrane can be used as the first step in the continuous production of membrane electrodes to form a proton exchange sealing membrane to realize the sealing protection of the proton exchange membrane, in order to improve the safety of subsequent membrane electrode production and reduce the The cost of use and the improvement of sealing performance provide a guarantee to improve the efficiency of the fuel cell; in addition, according to continuous production and habits, the opening and transportation direction of the coil is longitudinal, and the vertical transportation direction is transverse (ie its width).

Specifically, as shown in FIGS. 1 and 9 , the base film supply unit 3 has a base film unwinder 31, which unwinds the proton exchange membrane and then transports it to the bonding unit 4; the first adhesive layer supply unit 1 has a first An adhesive layer unwinding machine 11 unwinds the first sealant layer, and then transports it to the adhesive unit 4; the second adhesive layer supply unit 2 has a second adhesive layer unwinder 21, which unwinds the second sealant layer. The first adhesive layer supply unit 1 has a first adhesive layer die-cutting machine 12, which is die-cut to form the first central hollow portion 83 of the first sealant layer, and the second adhesive layer The supply unit 2 has a second adhesive layer die-cutting machine 22, which is die-cut to form a second central hollow portion 93 of the second sealant layer. After that, as shown in the figure, the first sealant layer is located on the upper surface of the proton exchange membrane, and the The second sealant layer is located on the lower surface of the proton exchange membrane, the bonding unit 4 has a first bonding roller 41 and a second bonding roller 42, and the pressing rollers cooperate to form the proton exchange sealing film.

In some embodiments, the adhesive layer supply unit includes an adhesive layer position sensor for acquiring the position information of the supplied sealant layer, including the first adhesive layer position sensor 13 and the second adhesive layer on the first adhesive layer supply unit 1 The second adhesive layer position sensor 23 on the layer supply unit 2 is used to control the supply speed of the adhesive layer supply unit according to the obtained position information, so that the center hollow parts of the first and second sealant layers after bonding are mutually Correspondingly; specifically, the position of the adhesive layer position sensor can be after the die-cutting machine to form the central hollow part, and can sense the edge of the central hollow part, and finally control according to the transmission distance and speed, so that when bonding unit 4, the first The first central hollow portion 83 of a sealant layer can correspond to the second central hollow portion 93 of the second sealant layer, so as to align the central hollow portion when cutting or using the proton exchange sealing film later, the catalytic layer corresponds to improve the The utilization rate of the proton exchange sealing membrane improves the efficiency of the fuel cell; of course, the first adhesive layer position sensor 13 on the first adhesive layer supply unit 1 and the second adhesive layer position sensor 23 on the second adhesive layer supply unit 2 can be set in Before the die-cutting machine, in this way, the working speed of the die-cutting machine can be controlled to achieve the corresponding purpose of the first central hollow portion 83 of the first sealant layer and the second central hollow portion 93 of the second sealant layer. Specifically, when it is found that the position information obtained by the first adhesive layer position sensor 13 and the second adhesive layer position sensor 23 is different, it is necessary to adjust the transmission speed in time according to the difference to balance the positional relationship.

In some embodiments, as shown in FIG. 1 , the base membrane supply unit 3 has a cutter 34 to cut the proton exchange membrane in the longitudinal direction to form a proton exchange membrane sheet; the proton exchange membrane sheet is supplied to the bonding unit and the first seal The adhesive layer and the second sealant layer are bonded; after the bonding, the sealant layer can seal the longitudinal edge of the proton exchange membrane in the longitudinal direction, and the first sealant layer and the second sealant layer have mutual adhesion on the outside of the longitudinal edge. A cutting machine 34 is provided on the base film supply unit 3, so that when the proton exchange membrane roll is transported to the front of the bonding unit 4, the cutting machine moves along the longitudinal direction to cut the proton exchange membrane roll to form the required Then, the proton exchange membrane is sealed in the bonding unit 4 to form a proton exchange sealing membrane. Since the sealant layer is still continuous at this time, the proton exchange sealing membrane can still be wound. The proton exchange sealing membrane is not formed; the purpose of cutting is to make the proton exchange membrane discontinuous, so that in one transportation, the width of the sealant layer can be controlled to form a transverse seal, and after cutting, the discontinuity is formed to form protons. The longitudinal sealing of the exchange membrane will eventually form a proton exchange sealing membrane that completely seals the proton exchange membrane, which plays a role of completely protecting and supporting the proton exchange membrane; The longitudinal joint of the adhesive layer between them is cut to form the required proton exchange sealing membrane.

In some embodiments, as shown in FIGS. 1 , 4 and 9 , the base film supply unit 3 includes a base film position sensor 33 for acquiring the position information of the supplied proton exchange sealing membrane; the adhesive layer supply unit includes a position sensor , to obtain the position information of the supplied sealant layer, including the first adhesive layer position sensor 13 on the first adhesive layer supply unit 1 and the second adhesive layer position sensor 23 on the second adhesive layer supply unit 2; according to The obtained position information controls the supply speed of the adhesive layer supply unit and the base film supply unit; so that the central hollow parts of the first and second sealant layers after bonding correspond to each other, and are formed in the center of the proton exchange sealing membrane Specifically, three position sensors, the base film position sensor 33, the first adhesive layer position sensor 13, and the second adhesive layer position sensor 23 obtain information to control the transmission speed, the first adhesive layer die-cutting machine 12, and the second adhesive layer. The working speed of the die-cutting machine 22 and the cutting machine 34 is such that the first central hollow portion 83 of the first sealant layer and the second central hollow portion 93 of the second sealant layer correspond to each other, and are formed in the center of the proton exchange sealing membrane. In this way, the size of the proton exchange sealing diaphragm is larger than the central hollow part, but smaller than the peripheral size of each unit of the sealant layer, which can form the lateral joint part of the glue layer and the longitudinal joint part of the glue layer, and can control the alignment of the bonding in real time to achieve high efficiency The purpose of producing proton exchange sealing membranes.

In some embodiments, as shown in FIG. 1, the base film supply unit 3 includes a base film unwinder 31 for supplying a proton exchange membrane with a protective film, and a protective film rewinder 32 for recycling the protective film, generally In some cases, the proton exchange membrane is supplied in rolls. Commercially, a protective film is often used to protect the proton exchange membrane, and the protective film is torn off during use. In the system work of this product, the base film can be used. The unwinder 31 is supplied with the proton exchange membrane of the protective film, and during transportation, the protective film is peeled off with the protective film rewinder 32 .

In some embodiments, as shown in FIGS. 1 , 4 and 9 , the sealant layer has a release film, and the adhesive layer supply unit includes an adhesive layer unwinder for supplying the sealant layer with the release film for recycling the release film. A release film rewinder for molding film; after the sealant layer is formed by a die-cutting machine to form a central hollow, the release film is peeled off by a release film rewinder; specifically, the first adhesive layer supply unit 1 has a first adhesive layer The unwinding machine 11 unwinds the first sealant layer with the release film, and then passes through the first adhesive layer die-cutting machine 12 to form the first central hollow portion 83 , and is then peeled off by the first release film rewinder 14 The release film is then transported to the bonding unit 4; the second adhesive layer supply unit 2 has a second adhesive layer unwinder 21, which unwinds the second sealant layer with the release film, and then passes through the second adhesive layer The die-cutting machine 22 forms the second central hollow portion 93 , and then the release film is peeled off by the second release film rewinder 24 , and then transported to the bonding unit 4 .

In some embodiments, as shown in FIGS. 1 and 9 , a winding unit 5 is further included to wind the proton exchange sealing film bonded by the bonding unit.

In some embodiments, as shown in FIGS. 1 and 9 , an adhesion inspection sensor 43 is further included for inspecting the first central hollow portion of the first sealant layer of the proton exchange sealing film after adhesion by the adhesion unit 4 83 and the second central hollow portion 93 of the second sealant layer correspond to each other, and are formed in the center of the proton exchange sealing membrane.

The present invention also relates to a method for preparing a proton exchange sealing membrane for a fuel cell, as shown in FIG. 10 , comprising: S1, supplying the proton exchange membrane to the bonding unit; S2, after the sealant layer is die-cut to form a central hollow portion, supply to the bonding unit; the sealant layer includes a first sealant layer and a second sealant layer; S3, the die-cut first sealant layer and the second sealant layer are respectively bonded on the proton exchange membrane The surface and the lower surface form a proton exchange sealing membrane; the length of the sealant layer in the lateral direction is greater than that of the proton exchange membrane, so that after bonding, the sealant layer can seal the lateral edges of the proton exchange membrane in the lateral direction, the first sealant The layer and the second sealant layer have adhesive layer lateral joints bonded to each other outside the lateral edges.

In some embodiments, as shown in FIG. 11 , it further includes, S11, the proton exchange membrane is subjected to a cutting machine to cut the proton exchange membrane in the longitudinal direction to form a proton exchange membrane sheet; S12, and then supplied to the bonding unit; S31, the bonding After being combined, the sealant layer can seal the longitudinal edges of the proton exchange membrane, and the first sealant layer and the second sealant layer have a longitudinal joint of the adhesive layers bonded to each other outside the longitudinal edges.

In some embodiments, it also includes, S4, winding up the proton exchange sealing film bonded by the bonding unit.

Specifically, combined with the explanation of the structure of the proton exchange sealing membrane and the system diagram, as shown in Figure 4, taking the proton exchange membrane as an example, a single unit is used as an explanation, the proton exchange membrane 7 has an upper surface 78 and a lower surface 79, and the proton exchange membrane 7 has an upper surface 78 and a lower surface 79. In the sealing membrane structure, the proton exchange membrane 7 is located in the middle; the first sealing glue layer 8 is located on the upper surface 78 of the proton exchange membrane 7, and has a first central hollow part 83, which is composed of the first sealing layer 81 and the first adhesive layer. 82, the first adhesive layer 82 faces the upper surface 78, so that the first sealant layer 8 is bonded to the upper surface 78; the second sealant layer 9 is located under the lower surface 79 of the proton exchange membrane 7, and has a second central hollow portion 93, which consists of a second sealing layer 91 and a second adhesive layer 92, the second adhesive layer 92 faces the lower surface 79, so that the second sealing adhesive layer 9 is bonded to the lower surface 79; FIG. 4 shows the first The size of the central hollow part 83 and the second central hollow part 93 is smaller than that of the proton exchange membrane 7, such as the proton exchange membrane, so that the space formed on the proton exchange membrane can be used for coating the catalyst layer; and the first sealant layer 8 , the outer dimension of the second sealant layer 9 is larger than that of the proton exchange membrane 7, including both the lateral dimension and the longitudinal dimension, and finally the lateral joint and the vertical joint of the sealant layer can be formed to completely seal the edge of the proton exchange membrane 7; Specifically, as shown in Figures 5 and 6, taking a continuous roll of one of the proton exchange sealing membranes as an example, it can be seen from the cross-sectional view of Figure 5 that the proton exchange sealing membrane includes a plurality of continuous rolls 6A, 6B, 6C, 6D, etc. Units, each unit includes the proton exchange membrane and the bonding of the first sealant layer 8 and the second sealant layer 9 that seal its edges; as shown in Figure 6, the part when the first sealant layer 8 is not included can be clear It can be seen that the proton exchange membranes 7A, 7B, 7C, 7D of the respective units of the proton exchange sealing membrane, and the second sealant layer 9 is located on the lower surface of these proton exchange membranes, and the transverse joint 891 is shown, The longitudinal joint 892; the lateral joint 891 is the continuous two long sides near and far from the viewing angle in the view, while the longitudinal joint 892 is discontinuous, the space between each proton exchange membrane 7A, 7B, 7C, 7D , is the short side, it should be pointed out that the horizontal joint 891 and the vertical joint 892 need the participation of the first sealant layer 8 to be formed, and the first sealant layer 8 is hidden here only for a clearer explanation; It can be understood that, in use, it can be cut along the T direction as shown in Figure 5, and finally each small unit is formed as a proton exchange sealing membrane, as the basic unit of the membrane electrode; the proton exchange sealing membrane described above is a In the case of a cutting machine, the continuous proton exchange membrane is pre-cut and then bonded to form a convenient proton exchange sealing membrane.

Specifically, taking FIG. 2 and FIG. 3 as examples, another proton exchange sealing membrane is introduced, which does not use a cutting machine, so that only the transverse joint 891 is formed, but the longitudinal joint 892 is not formed. Therefore, for the longitudinal edge of the proton exchange membrane It is not completely sealed and can be selected and used according to actual needs, which can reduce the number of processes, and can also meet the sealing requirements at the lateral edge and meet the sealing requirements in a single direction; because in actual use, the user may only need to adjust the single edge of the proton exchange membrane. The sealing can meet the requirements, and can also ensure the overall sealing, so this method is also a feasible solution; as shown in the cross-sectional view shown in Figure 2, the proton exchange sealing membrane includes a plurality of continuous unit, in which the proton exchange membrane is continuous, it can be clearly seen from the part of FIG. 3 that does not include the first sealant layer 8, the lower surface of the proton exchange membrane is the second sealant layer 9, which is continuous, and As shown in the figure, the transverse joint 891; when in use, it is cut along the T direction as shown in Figure 2, and finally each small unit is formed, as the proton exchange sealing membrane, as the basic unit of the membrane electrode, the longitudinal edge after cutting is not seal.

The sealing layer of the sealant layer generally has the function of anti-static, and the sealing layer can be PEN (polyethylene naphthalate) film, PET (polyethylene terephthalate) film, PI (polyimide) amine) film, etc.; because PEN film has good advantages in mechanical properties, high temperature resistance, gas barrier, environmental protection, hydrolysis resistance, chemical stability, heat resistance, ultraviolet resistance, and radiation resistance; the adhesion of the sealant layer The layer is generally selected from a silicone pressure-sensitive adhesive, which does not require hot pressing.

In some embodiments, the silicone pressure-sensitive adhesive is a solvent-free silicone pressure-sensitive adhesive, and the preparation method is as follows: 100 parts by weight of active polydimethylsiloxane, 1-50 parts by weight of one end of which is acryloxy Siloxane compound and 10-100 parts by weight of reactive diluent are mixed and stirred evenly to obtain base gum; 0.01-15 parts by weight of cross-linking agent and 0.01-0.8 parts by weight of at least one of platinum catalyst and mix. The mixed glue was cured at 150° C. for 5 minutes to obtain a solvent-free silicone pressure-sensitive adhesive; a solvent-free silicone pressure-sensitive adhesive, the adhesive had better pressure sensitivity than other adhesives, and when the adhesive passed the The finished sealing film is convenient for re-bonding after the sealing film is wrongly pasted, and is especially suitable for the laboratory environment. After baking to form a sealant layer, the sealant layer can be directly used for the above-mentioned use, or a release film can be attached to the adhesive layer to facilitate subsequent processing, and the release film can be peeled off during use; and Initial tack (GB/T4852-2002), tackiness (GB/T4851-2014), peel strength (GB/T2792-2014), tackiness at high temperature, hydrolysis resistance, etc. are tested to meet the requirements of proton exchange membrane composite sealing The performance requirements of the structure, especially the addition of acryloxy group, further improve the hydrolysis resistance of the adhesive layer. The proton exchange membrane composite sealing structure formed by the sealing film with this adhesive layer will not be used in fuel cells. Because the water produced by the fuel cell reaction causes the adhesive layer to fall off prematurely and fail, it has the characteristics of stable viscosity, high cohesion, high stickiness, good thermal shock performance, strong adsorption, good tearing and no glue residue, and good sealing performance. .

Although the embodiment of the present invention has been disclosed as above, it is not limited to the application listed in the description and the embodiment, and it can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Therefore, the invention is not limited to the specific details without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims

A fuel cell proton exchange sealing membrane preparation system is characterized in that, comprising:

A base membrane supply unit for supplying the proton exchange membrane and transporting it to the bonding unit;

The adhesive layer supply unit is used to supply the sealant layer and transmit it to the adhesive unit; the adhesive layer supply unit has a die-cutting machine for forming the central hollow part of the sealant layer; the adhesive layer supply unit includes a first an adhesive layer supply unit and a second adhesive layer supply unit to provide a first sealant layer for adhering to the upper surface of the proton exchange membrane and a second sealant layer for adhering to the lower surface of the proton exchange membrane;

a bonding unit, which bonds the first sealant layer and the second sealant layer to the upper surface and the lower surface of the proton exchange membrane to form a proton exchange sealing membrane;

The length of the sealant layer in the lateral direction is greater than that of the proton exchange membrane, so that after bonding, the sealant layer can seal the lateral edges of the proton exchange membrane in the lateral direction, and the first sealant layer and the second sealant layer have The lateral joint of the adhesive layer bonded to each other on the outside of the lateral edge.
The proton exchange sealing film preparation system according to claim 1, wherein the adhesive layer supply unit comprises an adhesive layer position sensor for acquiring the position information of the supplied sealant layer, including a first adhesive layer supply unit The first adhesive layer position sensor on the upper and the second adhesive layer position sensor on the second adhesive layer supply unit are used to control the supply speed of the adhesive layer supply unit according to the acquired position information, so that the bonded first sealant layer and The central hollow portions of the second sealant layer correspond to each other.
The proton exchange sealing membrane preparation system according to claim 1, wherein the base membrane supply unit has a cutter to cut the proton exchange membrane in a longitudinal direction to form a proton exchange membrane sheet; the proton exchange membrane supplying until the bonding unit is bonded with the first sealant layer and the second sealant layer; after bonding, the sealant layer can seal the longitudinal edges of the proton exchange membrane in the longitudinal direction, the first sealant layer and the second sealant The layers have longitudinal joints of glue layers bonded to each other outside the longitudinal edges.
The proton exchange sealing membrane preparation system according to claim 3, wherein the base membrane supply unit comprises a base membrane position sensor for acquiring position information of the supplied proton exchange sealing membrane; the adhesive layer supplying The unit includes a position sensor for acquiring position information of the supplied sealant layer, including a first adhesive layer position sensor on the first adhesive layer supply unit and a second adhesive layer position sensor on the second adhesive layer supply unit; according to The obtained position information controls the supply speed of the adhesive layer supply unit and the base film supply unit; so that the central hollow parts of the first and second sealant layers after bonding correspond to each other, and are formed in the center of the proton exchange sealing membrane .
The proton exchange sealing membrane preparation system according to claim 1, wherein the base membrane supply unit includes a base membrane unwinder for supplying the proton exchange membrane with the protective membrane, and a protective membrane for recycling the protective membrane Winder.
The proton exchange sealing film preparation system according to claim 1, wherein the sealant layer has a release film, and the adhesive layer supply unit comprises an adhesive layer unwinding for supplying the sealant layer with the release film It is a release film rewinder for recycling release film; after the sealant layer is formed by a die-cutting machine to form a central hollow portion, the release film is peeled off by a release film rewinder.
The system for preparing a proton exchange sealing membrane according to claim 1, further comprising a winding unit for winding the proton exchange sealing membrane bonded by the bonding unit.
A method for preparing a proton exchange sealing membrane for a fuel cell, comprising:

supplying the proton exchange membrane to the bonding unit;

After the sealant layer is die-cut to form a central hollow portion, it is supplied to the bonding unit; the sealant layer includes a first sealant layer and a second sealant layer;

The die-cut first sealant layer and the second sealant layer are respectively bonded to the upper surface and the lower surface of the proton exchange membrane to form a proton exchange sealing membrane;

The length of the sealant layer in the lateral direction is greater than that of the proton exchange membrane, so that after bonding, the sealant layer can seal the lateral edges of the proton exchange membrane in the lateral direction, and the first sealant layer and the second sealant layer have The lateral joint of the adhesive layer bonded to each other on the outside of the lateral edge.
The method for preparing a proton exchange sealing membrane according to claim 8, further comprising: cutting the proton exchange membrane in a longitudinal direction by a cutting machine to form a proton exchange membrane sheet, and then supplying it to the bonding unit; After the sealing, the sealant layer can seal the longitudinal edges of the proton exchange membrane in the longitudinal direction, and the first sealant layer and the second sealant layer have a longitudinal bonding portion of the adhesive layers bonded to each other outside the longitudinal edges.
The method for preparing a proton exchange sealing membrane according to claim 8, further comprising winding the proton exchange sealing membrane after being bonded by the bonding unit.