JP2020113391A - Manufacturing device for membrane electrode assembly - Google Patents

Abstract

To provide a manufacturing method of a membrane electrode assembly capable of suppressing variations in a thickness of an adhered portion while suppressing air bubbles from being caught into an adhesive.SOLUTION: A manufacturing device 300 comprises: a first pressing member 40 which presses a frame-shaped sheet member 50 to a membrane electrode assembly 11 of a MEGA 10'; and a second pressing member 60 which further presses the frame-shaped sheet member 50 thereafter. Each of the first and second pressing members 40 and 60 is a frame-shaped member constituted of an edge part 43. A pressing surface 44 of the first pressing member 40 includes an inclined plane 45 which is inclined in such a manner that both end portions 44a and 44b of the edge part 43 are separated from the frame-shaped sheet member 50 further than a portion therebetween on a cross section of the edge part 43 of the first pressing member 40 in a width direction. On a cross section of an edge part 63 of the second pressing member 60 in the width direction, a pressing surface 64 pressing the frame-shaped sheet member 50 is a flat surface 65 which presses a surface of the frame-shaped sheet member 50 in a uniform manner.SELECTED DRAWING: Figure 7

Description

The present invention relates to an apparatus for manufacturing a membrane electrode assembly assembly.

The fuel cell has a fuel cell stack in which a plurality of fuel cells are stacked. Each fuel cell has a membrane electrode assembly (MEA) and a pair of separators that sandwich the membrane electrode assembly from both sides. The membrane electrode assembly is usually rectangular, and a frame-shaped sheet member is arranged on the outer peripheral portion thereof, and the frame-shaped sheet member and a pair of separators are bonded and integrated to form a fuel cell. The membrane electrode assembly and the frame-shaped sheet member before being sandwiched by the separators are referred to as a membrane electrode assembly assembly.

In manufacturing a membrane electrode assembly, an adhesive is applied in a frame shape on the outer periphery of a rectangular membrane electrode assembly, and the frame-shaped sheet member is bonded using the adhesive applied in a frame shape. To do. In bonding, in order to avoid bubbles remaining in the bonded portion, a pressing member is used to press the area coated with the adhesive from above the frame-shaped sheet member.

For example, Patent Document 1 describes an example of a method for manufacturing a membrane electrode assembly. There, an adhesive is applied in a frame shape to the outer peripheral portion of a rectangular membrane electrode assembly, and a frame-shaped frame-shaped sheet member is adhered using the adhesive applied in a frame shape.

At the time of this adhesion, the portion of the opening corresponding to the adhesive applied in a frame shape on the outer peripheral portion of the membrane electrode assembly in the frame-shaped sheet member is contacted with the adhesive in a posture inclined with respect to the membrane electrode assembly. Let In this state, the frame-shaped sheet member is pressed from above to bond and integrate the frame-shaped sheet member and the membrane electrode assembly. By tilting at least the portion of the opening corresponding to the adhesive in the frame-shaped sheet member, it is possible to suppress the generation of bubbles on the contact surface between the adhesive applied to the membrane electrode assembly and the frame-shaped sheet member. It Thereby, when operating as a fuel cell, it is possible to avoid the inconvenience that the working gas leaks to the outside through the adhesive portion.

The membrane electrode assembly is usually composed of a solid electrolyte membrane and catalyst layers formed on both surfaces thereof. A membrane electrode assembly in which a gas diffusion layer is further laminated on the surface of the catalyst layer opposite to the side facing the electrolyte membrane is also used, and is sometimes referred to as a membrane electrode gas diffusion layer laminate (MEGA).

JP, 2008-120736, A

By the way, the inventors of the present invention have been involved in the production of a membrane electrode assembly and the production of a fuel cell using the same, but the production cost of the fuel cell is reduced and the production cycle time is shortened. Today, the manufacturing method described in Patent Document 1 includes a step of partially forming an inclined portion on the frame-shaped sheet member, and there is still room for improvement from the viewpoint of shortening the cycle time. Experienced that.

Therefore, for example, by inclining the pressing surface of the pressing member with respect to the surface of the frame-shaped sheet member, it is possible to prevent air bubbles from being caught in the adhesive. In this case, however, the pressing surface is inclined. As a result, the thickness of the portion where the frame-shaped sheet member and the membrane electrode assembly are bonded varies.

The present invention has been made in view of the above circumstances, and as the present invention, in manufacturing a membrane electrode assembly, the frame-shaped sheet member and the membrane electrode assembly are suppressed while preventing air bubbles from being caught in the adhesive. Provided is a method of manufacturing a membrane electrode assembly assembly capable of suppressing fluctuations in the thickness of the portions to which are bonded.

In view of the above-mentioned problems, the manufacturing apparatus for a membrane electrode assembly according to the present invention uses a frame-shaped adhesive applied to the membrane-electrode assembly having an outer peripheral portion coated with a frame-shaped adhesive. A frame-shaped sheet member made of resin is adhered to the outer periphery of the membrane electrode assembly to manufacture a membrane electrode assembly assembly, wherein the manufacturing apparatus is the A first pressing member that presses the frame-shaped sheet member against the membrane electrode assembly; and a second pressing member that presses the frame-shaped sheet member after pressing with the first pressing member. The first and second pressing members are frame-shaped members composed of edge portions that match the shape of the adhesive applied to the membrane electrode assembly, and each edge portion of the first pressing member In the cross section in the width direction, the pressing surface that presses the frame-shaped sheet member is such that at least one of the both ends of the edge portion is farther from the frame-shaped sheet member than the portion between the both ends. And a pressing surface that presses the frame-shaped sheet member uniformly in the cross section in the width direction of each edge of the second pressing member that presses the surface of the frame-shaped sheet member uniformly. It is characterized by a flat surface.

According to the present invention, in the cross section in the width direction of each edge portion of the first pressing member of the manufacturing apparatus, the pressing surface for pressing the frame-shaped sheet member has at least one of both end portions of the edge portion It has an inclined surface inclined so as to be separated from the frame-shaped sheet member rather than the portion between them. Thereby, the air between the frame-shaped sheet member and the adhesive can be released to at least one end side of the frame body only by pressing the frame-shaped sheet member with the first pressing member, and the air is trapped in the adhesive. This can be prevented easily and quickly.

The frame-shaped sheet member thus pressed by the first pressing member is deformed according to the inclined surface of the first pressing member. However, in the cross section in the width direction of each edge of the second pressing member, the pressing surface that presses the frame-shaped sheet member has a flat surface that uniformly presses the surface of the frame-shaped sheet member. By simply pressing the deformed frame-shaped sheet member with the pressing member, the deformation of the frame-shaped sheet member is corrected into a flat shape, and fluctuations in the thickness of the portion where the frame-shaped sheet member and the membrane electrode assembly are bonded are suppressed. Can be uniform.

The "membrane electrode assembly" to which the frame-shaped sheet member is adhered in the present invention means that a catalyst layer (electrode layer) is formed on both surfaces of a solid electrolyte membrane, or one of It includes both those having a gas diffusion layer formed on the surface or both surfaces.

It is a typical perspective view of the membrane electrode assembly assembly manufactured by this embodiment. It is sectional drawing which follows the AA line of FIG. FIG. 2 is a partially enlarged cross-sectional view showing an example of a fuel battery cell made using the membrane electrode assembly assembly shown in FIG. 1. (A) is a schematic perspective view for explaining the application position of the adhesive of the membrane electrode assembly, and (b) is a sectional view taken along the line BB of (a). (A) is a top view of a 1st press member, (b) is sectional drawing which follows CC line, (c) and (d) is a 1st press member of (b). This is a modified example. (A) is a top view of a 2nd press member, (b) is sectional drawing which follows the DD line. (A)-(d) is a figure for demonstrating the manufacturing process of a membrane electrode assembly assembly. 7A is an enlarged cross-sectional view for explaining the pressing step (bonding step) in FIGS. 7C and 7D, and FIGS. 6B and 6C are FIGS. 6C and 6C. It is an expanded sectional view explaining the press process (bonding process) when the 1st press member of d) is used. 5 is a graph showing the relationship between the pressing time and the seal width (adhesive width) in Reference Example 1 and Reference Example 2. 5 is a graph showing the relationship between the press load and the bubble removal time in Reference Example 1 and Reference Example 2. 5 is a graph showing the thickness of the adhesive at the position of the adhesive portion in Example 1 and Comparative Example 1. 9 is a graph showing the relationship between the number of adhesions and the amount of deviation in Reference Examples 3 and 4.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view of a membrane electrode assembly assembly 100 manufactured by the manufacturing apparatus 300 of the present embodiment, and FIG. 2 is a sectional view taken along the line AA of FIG. 1.

The membrane electrode assembly assembly 100 includes a membrane electrode diffusion layer assembly (MEGA) 10 and a frame-shaped sheet member 50. The MEGA 10 has a rectangular shape in a plan view, and includes a membrane electrode assembly 11 and gas diffusion layers 12a and 12b laminated on both surfaces thereof, as shown in FIG. The membrane electrode assembly 11 is composed of an electrolyte membrane and catalyst layers formed on both surfaces thereof. In the following description, the MEGA 10' is defined as one in which the gas diffusion layer 12a is not joined to one side of the membrane electrode assembly 11 and the gas diffusion layer 12b is joined to the other side.

In this example, the size and shape of the lower gas diffusion layer 12b in plan view are substantially the same as the size and shape of the membrane electrode assembly 11. The upper gas diffusion layer 12a is smaller than the lower gas diffusion layer 12b. In addition, in this embodiment, after the gas diffusion layer 12b is joined to the membrane electrode assembly 11 to manufacture the MEGA 10′ and before the gas diffusion layer 12a is joined, the membrane electrode assembly 11 of the MEGA 10′ is joined. The frame-shaped sheet member 50 is adhered.

As shown in FIGS. 4A and 4B, the surface of the membrane electrode assembly 11 of the MEGA 10′ has a frame-shaped (frame-shaped) bonding region 13A to which the frame-shaped sheet member 50 is bonded and a bonding region 13A. And a joining region 13B to which the gas diffusion layer 12a is joined.

The frame-shaped sheet member 50 is made of resin and is a member that seals fuel gas (hydrogen gas), oxidant gas (atmosphere), and cooling water flowing through the separators 71a and 71b in the fuel cell 200 shown in FIG. Yes, it has flexibility.

As shown in FIG. 7B, which will be described later, the frame-shaped sheet member 50 has a space 51 having a shape and size in the center through which the gas diffusion layer 12a to be bonded to the membrane electrode assembly 11 can enter. It is a frame-shaped member held in the part. The frame-shaped sheet member 50 has an adhesive layer 52 on the outer peripheral edge portion for bonding the separators 71a and 71b by heat and pressure. The frame-shaped sheet member 50 is integrally bonded to the MEGA 10 ′, and then the gas diffusion layer 12 a is bonded to the MEGA 10 ′ to form the membrane electrode assembly 100.

As shown in FIG. 3, a pair of separators 71 a and 71 b are arranged on both surfaces of the membrane electrode assembly 100 to form the fuel cell 200. In the illustrated fuel cell 200, the upper separator 71a is bonded and integrated with the frame-shaped sheet member 50 by the adhesive layer 52 formed on the outer peripheral edge of the upper surface of the frame-shaped sheet member 50. The lower separator 71b is bonded and integrated with the frame-shaped sheet member 50 by the adhesive layer 52 formed on the outer peripheral edge of the lower surface.

FIG. 4A is a schematic perspective view for explaining the application position of the adhesive 20 of the membrane electrode assembly 11, and FIG. 4B is taken along the line BB of FIG. 4A. FIG. When manufacturing the membrane electrode assembly 100, the frame-shaped sheet member 50 is bonded and integrated with the membrane electrode assembly 11. In order to bond and integrate, as shown in the figure, the adhesive 20 is applied to the frame-shaped bonding region 13A of the membrane electrode assembly 11.

As shown in FIG. 1, the frame-shaped sheet member 50 has a rectangular shape and has a void space 51 in the center thereof. The frame-shaped sheet member 50 is bonded and integrated with the membrane electrode assembly 11. The back surface of the frame-shaped sheet member 50 near the void 51 is in contact with the adhesive 20 applied to the membrane electrode assembly 11. As will be described later, by sequentially pressing the frame-shaped sheet member 50 with the first pressing member 40 and the second pressing member 60 from above, the frame-shaped sheet member 50 and the membrane electrode assembly 11 are reliably bonded. Unify. After the bonding and integration, the gas diffusion layer 12a enters into the void 51 and the gas diffusion layer 12a is joined to the membrane electrode assembly 11 to obtain the membrane electrode assembly assembly 100.

As shown in FIGS. 7A to 7D, the manufacturing apparatus 300 of the membrane electrode assembly 100 includes a base 301 on which the MEGA 10 ′ is mounted, and the first pressing member (first press die) 40 described above. And a second pressing member (second press type) 60, and a pressure device (not shown) for sequentially pressing these toward the base 301. The mechanism of the pressing device is not particularly limited as long as it can sequentially press the frame-shaped sheet member 50 in the order of the first pressing member 40 and the second pressing member 60.

For example, the pressure device conveys the first pressing member 40 after pressing the frame-shaped sheet member 50 with the first pressing member 40, and further conveys the frame-shaped sheet member 50 with the second pressing member 60 (conveying device ( (Not shown) and a control device (not shown) for controlling this may be provided.

As another configuration, the pressure device includes a transport device (not shown) that transports the MEGA 10 ′ and the frame-shaped sheet member 50 on the base 301, and the first device is arranged along the transport direction. A control device (not shown) that controls the pressing of the pressing member 40 and the second pressing member 60 may be provided. At this time, an elevating mechanism (floating mechanism) for elevating the first pressing member 40 and the second pressing member 60 with respect to the base 301 may be provided.

As shown in FIG. 5A, the first pressing member 40 has a frame-like shape in a plan view, and includes a rectangular frame body 41 and a space 42 surrounded by the rectangular frame body 41. Have. The size and shape of the void 42 are substantially the same as the size and shape of the void 51 formed in the frame-shaped sheet member 50. The frame body 41 includes four edge portions 43 that are orthogonal to each other and four corner portions 47 that are intersections of two adjacent edge portions 43. In the present embodiment, the four edges 43 have the same width, but they may have different widths. 5(b) to 5(d) and 6(b), the position of the frame-shaped sheet member 50 before pressing is indicated by a virtual line (two-dot chain line).

The top of the edge 43 is formed in a straight line along the length direction of each edge 43. Each of the four corner portions 47 has a shape in which two orthogonal edge portions 43 cut at an angle of 45° are assembled to each other at 90°.

As shown in FIG. 5B, the pressing surface 44 side of the frame 41 has a curved shape that bulges in the pressing direction (downward in the drawing). Specifically, in the cross section in the width direction of each edge 43 of the first pressing member 40, the cross-sectional shape is the same shape over the entire length, and the center in the width direction is the highest toward the frame-shaped sheet member 50. Has become. However, the highest position toward the frame-shaped sheet member 50 may be outside or inside of the center in the width direction, and by shifting this position from the center, the fluidity of the adhesive 20 is improved. Can be controlled.

In the present embodiment, the pressing surface 44 that presses the frame-shaped sheet member 50 is a surface that faces the frame-shaped sheet member 50 at the time of pressing in the cross section in the width direction of each edge 43 of the first pressing member 40. The pressing surface 44 has inclined surfaces 45, 45 that are inclined with respect to the surface of the frame-shaped sheet member 50 in the cross section in the width direction. The inclined surfaces 45, 45 are separated from the center of the edge 43 by the ends 44a, 44b so that the ends 44a, 44b are farther from the frame-shaped sheet member 50 than the part between the ends 44a, 44b. It is inclined toward 44b. In the present embodiment, the inclined surface 45 has a curved surface shape that is curved so as to bulge, but the inclined surface may have a planar shape, for example.

In addition, in the present embodiment, the pressing surface 44 has the inclined surface 45 that is inclined so that both end portions in the width direction are separated from the frame-shaped sheet member 50 more than a portion between the both end portions, As shown in FIG. 5C, in the pressing surface 44, the inner end portion 44b of the both end portions 44a and 44b of the edge portion 43 is farther from the frame-shaped sheet member 50 than the outer end portion 44a. The inclined surface 45A may be inclined as described above.

In addition to this, as shown in FIG. 5( d ), the pressing surface 44 is a frame-shaped sheet in which the outer end 44 a of the both ends 44 a and 44 b of the edge 43 is more than the inner end 44 b. It may be an inclined surface 45B inclined so as to be separated from the member 50. Since a flow path for fuel gas and the like is formed near the inner end 44b after the separators 71a and 71b are joined together, the first end pressing member 40 applies an adhesive to the inner end 44b during pressing. Is preferable, and such a cross-sectional shape is the cross-sectional shape shown in FIGS. 5B and 5D.

The base 301 described above may be provided with a fixing portion that detachably fixes the membrane electrode assembly 11 (MEGA 10') to which the gas diffusion layer 12b is joined. The fixing portion may be a suction mechanism that suction-fixes the base 301, or may be a claw grip that grips the membrane electrode assembly 11, a one-sided touch, or the like.

As shown in FIG. 6A, the second pressing member 60 also has a frame-like shape in a plan view, and has a rectangular frame body 61 and a space 62 surrounded by the rectangular frame body 61. Have. Similar to the first pressing member 40, the size and shape of the space 62 are substantially the same as the size and shape of the space 51 formed in the frame-shaped sheet member 50. The frame body 61 is composed of four linear edge portions 63 that are orthogonal to each other and four corner portions 67 that are intersections of two adjacent edge portions 63. Each of the four corner portions 67 has a shape in which two orthogonal edge portions 63 cut at an angle of 45° are assembled to each other at 90°.

The pressing surface side of the frame 61 projects in a rectangular shape, and the cross-sectional shape of each edge 63 of the second pressing member 60 in the width direction has the same cross-sectional shape over the entire length. Specifically, in the cross section in the width direction of each edge 63 of the second pressing member 60, the pressing surface 64 that presses the frame-shaped sheet member 50 is a flat surface 65 that uniformly presses the surface of the frame-shaped sheet member 50. It has become.

The width of the adhesive at the time of application is L1, the height of the adhesive at the time of application is T1, the width of the adhesive after being pressed by the first pressing member 40 is L2, and the thickness of the adhesive is T2. At this time, the width of the first pressing member 40 is preferably L2 or more (however, L1<L2, T1>T2). The width of the first pressing member 40 and the second pressing member 60 may be sufficiently wider than the width L2 of the adhesive after pressing. Moreover, it is preferable that the first pressing member 40 and the second pressing member 60 are configured to follow the deformation of the frame-shaped sheet member at the time of pressing.

The manufacturing procedure of the membrane electrode assembly assembly 100 will be described with reference to FIG. 7. First, as shown in FIG. 7A, the MEGA 10 ′ is placed on the base 301 so that the lower gas diffusion layer 12 b is on the base 301 side. Next, the adhesive 20 is applied to the adhesion region 13A of the membrane electrode assembly 11 in a frame shape. FIG. 4 shows a state after the adhesive 20 is applied.

After applying the adhesive 20, as shown in FIG. 7B, the frame-shaped sheet member 50 is arranged in the adhesion region 13A on the membrane electrode assembly 11 of the MEGA 10'. The first pressing member 40 is further arranged on the frame-shaped sheet member 50 thus arranged, with the curved lower surface side thereof facing the frame-shaped sheet member 50. The MEGA 10 ′ may be fixed to the base 301 by a suction mechanism or the like.

After disposing the first pressing member 40 on the frame-shaped sheet member 50, the pressurizing device is operated to direct the first pressing member 40 toward the base 301 as indicated by an arrow in FIG. Pressurize. By the pressurization of the first pressing member 40, the frame-shaped sheet member 50 descends so as to crush the adhesive 20, and is bonded and integrated with the MEGA 10'.

This state is shown in the left diagram of FIG. 7(c) and FIG. 8(a). As the pressing of the frame-shaped sheet member 50 progresses, the air between the frame-shaped sheet member 50 and the adhesive 20 escapes toward both sides of the first pressing member 40 in the width direction. In this way, the removal of bubbles from the adhesive 20 progresses, and the bonding and integration can be performed in the state where no bubbles are present at the bonding interface. At this time, the frame-shaped sheet member 50 pressed by the first pressing member 40 is deformed according to the inclined surface 45 of the first pressing member 40.

Therefore, the first pressing member 40 is separated from the frame-shaped sheet member 50, and then, similarly to the first pressing member 40, the second pressing member 60 is arranged at a position facing the frame-shaped sheet member 50, and the second pressing member 40 is pressed. The member 60 presses the frame-shaped sheet member 50. As shown in the right diagrams of FIGS. 7D and 8A, the pressing surface 64 of the second pressing member 60 that presses the frame-shaped sheet member 50 uniformly presses the surface of the frame-shaped sheet member 50. It has a flat surface 65 that Therefore, only by pressing the deformed frame-shaped sheet member 50 with the second pressing member 60, the deformation of the frame-shaped sheet member 50 can be corrected into a flat shape. This makes it possible to make uniform the variation in the thickness of the bonded portion where the frame-shaped sheet member 50 and the MEGA 10' are bonded.

In the pressing step shown in FIG. 7C, if the frame-shaped sheet member 50 is pressed using the first pressing member 40A shown in FIG. 5C, as the pressing of the frame-shaped sheet member 50 progresses, Air between the frame-shaped sheet member 50 and the adhesive 20 escapes toward the inside of the frame-shaped sheet member 50 (see the left diagram in FIG. 8B).

On the other hand, in the pressing step shown in FIG. 7C, if the frame-shaped sheet member 50 is pressed using the first pressing member 40B shown in FIG. 5D, as the pressing of the frame-shaped sheet member 50 progresses, Air between the frame-shaped sheet member 50 and the adhesive 20 escapes toward the outside of the frame-shaped sheet member 50 (see the left diagram in FIG. 8C). Regardless of which of the first pressing members 40A and 40B is used, the deformation of the frame-shaped sheet member 50 can be corrected into a flat shape by pressing the frame-shaped sheet member 50 with the second pressing member 60 (Fig. 8(b) right figure, FIG. 8(c) right figure).

(Reference examples 1 and 2)
Hereinafter, a case where the frame-shaped sheet member is pressed using the first pressing member shown in FIG. 5B so as to be in the states shown in FIGS. 7B to 7C is referred to as Reference Example 1. A pressing test was performed on each of the first pressing members whose pressing surface is a flat surface in the same state as in Reference Example 2 in which the frame-shaped sheet member was pressed. In the first pressing member used in Reference Example 1, the pressing surface is a semicircular curved surface having a radius of 5.5 mm in the cross section in the width direction.

The relationship between the pressing time and the seal width (the width in which the adhesive is filled in the adhesive portion without bubbles) when pressing with the first pressing member in Reference Examples 1 and 2, and the press load and the bubble removal time. Confirmed the relationship with. The results are shown in FIGS. 9 and 10. As shown in FIG. 9, in the case of Reference Example 1, it can be seen that a desired seal width can be secured in a shorter time than in Reference Example 2. This is considered to be because in the case of Reference Example 1, since the pressing surface was curved in a convex shape, the adhesive spread more easily than in Reference Example 2.

As shown in FIG. 10, in the case of Reference Example 1, air bubbles can be removed with a lower press load than in Reference Example 2. This is because in the case of Reference Example 1, since the pressing surface is curved in a convex shape, the adhesive and the frame-shaped sheet member are moved toward both sides in the width direction of the first pressing member as compared with Reference Example 2. It is thought that this is because the air between and can easily escape.

Examples of the present invention will be described below.

(Example 1)
After preparing the MEGA and the frame-shaped sheet member to which one gas diffusion layer is bonded as shown in FIG. 1 and applying an adhesive to the bonding region of the MEGA membrane electrode assembly, the frame-shaped sheet member A test body was prepared which was pressed by the pressing member and then pressed by the second pressing member.

(Comparative Example 1)
A test body was prepared in the same manner as in the example. The difference from Example 1 is that the frame-shaped sheet member was only pressed by the first pressing member, and was not subsequently pressed by the second pressing member.

For the test bodies of Example 1 and Comparative Example 1, the thickness of the adhesive between the MEGA and the frame-shaped sheet member was measured at intervals of 1 mm in the width direction. The result is shown in FIG. As is clear from FIG. 11, in the case of Comparative Example 1, the thickness of both ends of the adhesive was larger than that of the center, depending on the shape of the pressing surface of the first pressing member. However, in the test body of Example 1, it is considered that the second pressing member, whose pressing surface is a flat surface, further pressed the frame-shaped sheet member, so that the variation in the thickness of the bonded portion could be made uniform. ..

(Example 2)
Ten test bodies were prepared in the same manner as in Example 1. The difference from the first embodiment is that a suction mechanism for sucking MEGA to which one gas diffusion layer is bonded is provided on the base, and the MEGA is suction-fixed by the suction mechanism of the base, and the suction mechanism is used together with the frame-shaped sheet member. 1 The point where the pressing member pressed the membrane electrode assembly via the adhesive.

(Example 3)
Ten test bodies were prepared in the same manner as in Example 2. The difference from Example 2 is that a suction mechanism for sucking MEGA is not provided on the base, and the frame-shaped sheet member arranged on the membrane electrode assembly is pressed by the first pressing member via the adhesive. It is a point.

The amount of deviation between the membrane electrode assembly of each MEGA of Example 2 and Example 3 and the frame-shaped sheet member was confirmed. As a result, it was found that when the MEGA was pressed while being sucked by the suction mechanism of the base as in Example 2, the positional deviation of the frame-shaped sheet member during pressing was smaller than in Example 3.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. You can make changes.

10, 10': MEGA, 11: membrane electrode assembly, 40: first pressing member, 44: pressing surface, 45, 45A, 45B: inclined surface, 50: frame-shaped sheet member, 60: second pressing member, 64 : Pressing surface, 65: flat surface, 100: membrane electrode assembly assembly, 300: manufacturing device

Claims (1)

A frame-shaped sheet member made of resin is adhered to the outer periphery of the membrane electrode assembly through the adhesive applied in a frame shape to the membrane electrode assembly in which a peripheral surface is coated with an adhesive agent in a frame shape. And a manufacturing apparatus for a membrane electrode assembly, which manufactures a membrane electrode assembly, comprising:
The manufacturing apparatus includes a first pressing member that presses the frame-shaped sheet member against the membrane electrode assembly during bonding, and a second pressing member that presses the frame-shaped sheet member with the first pressing member. And a pressing member,
The first and second pressing members are frame-shaped members composed of edge portions, which match the shape of the adhesive applied to the membrane electrode assembly,
In a cross section in the width direction of each edge of the first pressing member, the pressing surface that presses the frame-shaped sheet member has at least one end of both ends of the edge more than a part between the both ends. , Having an inclined surface inclined away from the frame-shaped sheet member,
In the cross section in the width direction of each edge of the second pressing member, the pressing surface that presses the frame-shaped sheet member is a flat surface that uniformly presses the surface of the frame-shaped sheet member. Manufacturing equipment for electrode assembly.

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