Manufacturing method of long electrode stack and manufacturing device of long electrode stack

Abstract

To provide a method and a manufacturing device that allow for the manufacture of an elongated electrode laminate formed by laminating an elongated electrolyte film and an elongated electrode film industrially efficiently without producing wrinkles or bubbles.SOLUTION: A manufacturing device for an elongated electrode laminate comprises: a roll press that forms a base-material-equipped elongated electrode laminate by pressure-bonding an elongated catalyst film and a base-material-equipped elongated electrolyte film while transporting them in a longitudinal direction; a base-material peeling roll that peels the base material of the base-material-equipped elongated electrode laminate so as to form an elongated electrode laminate; a base-material rolling-up roll that rolls up the base material peeled from the base-material-equipped elongated electrode laminate; and a base-material stripping starter that is provided downstream in a transport direction of the elongated electrode laminate and located between a first point being a position with a length equivalent to a distance to the base-material rolling-up roll from a reference position, which is a position of the base-material peeling roll, and a second point which is separated from the first point by a length equivalent to a diameter of the base-material rolling-up roll.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method and an apparatus for manufacturing a long electrode stack. [Background technology]

[0002] In recent years, research and development into fuel cells, which contribute to energy efficiency, has been conducted to ensure that more people have access to affordable, reliable, sustainable, and advanced energy. Fuel cells generally have an electrode assembly (MEA) including an anode catalyst layer and a cathode catalyst layer that are arranged opposite each other with an electrolyte layer interposed therebetween. As a method for continuously manufacturing electrode assemblies, a method has been considered in which a long electrolyte membrane is transported in the longitudinal direction, and a cathode catalyst layer is laminated on one surface of the electrolyte membrane, and an anode catalyst layer is laminated on the other surface of the electrolyte membrane (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-102330 Summary of the Invention [Problem to be solved by the invention]

[0004] In fuel cell technology, it is important to stack an electrode membrane including an anode catalyst layer or a cathode catalyst layer on an electrolyte membrane without leaving any gaps. However, when an electrode membrane is stacked on the surface of a long electrolyte membrane while transporting the electrolyte membrane in the longitudinal direction, wrinkles may occur in the electrolyte membrane or the electrode membrane, or air bubbles may occur between the electrolyte membrane and the electrode membrane.

[0005] The present invention has been made in view of the above circumstances, and aims to provide a method and manufacturing apparatus for industrially and efficiently manufacturing a long-sized electrode stack in which a long-sized electrolyte membrane and a long-sized electrode membrane are stacked without generating wrinkles or bubbles, thereby contributing to improving energy efficiency. [Means for solving the problem]

[0006] The present inventors have found that the above-mentioned problems can be solved by pressure-bonding a long-sized electrolyte membrane with a substrate and a long-sized catalyst membrane to obtain a long-sized electrode stack with a substrate, and then peeling off the substrate by a predetermined method, and have thus completed the present invention.

[0007] (1) A method for producing a long electrode stack, comprising: a crimping step of crimping a long catalyst membrane and a long electrolyte membrane with a substrate while transporting them in the longitudinal direction to form a long electrode stack with a substrate; a substrate peeling step of peeling the substrate from the long electrode stack with a substrate by pulling the long electrode stack with a substrate along a substrate peeling roll arranged on the substrate side of the long electrode stack with a substrate while transporting the long electrode stack with a substrate in the longitudinal direction to form a long electrode stack; and a substrate winding step of taking up the substrate peeled from the long electrode stack with a substrate around a substrate winding roll, wherein the substrate peeling step is started by the following method. 1) A part of the elongated electrode laminate with the substrate is cut in the width direction to form a cut portion, and the substrate is peeled off from the elongated electrode laminate with the substrate, starting from the cut portion. 2) The tip of the peeled substrate is wound around the substrate take-up roll. 3) The substrate is wound around the substrate winding roll, and the substrate of the long electrode laminate with substrate is pulled.

[0008] According to the method for producing a long electrode stack of (1), when the long catalyst membrane and the long electrolyte membrane with substrate are pressure-bonded to each other in the pressure-bonding step, the long catalyst membrane and the long electrolyte membrane are supported by the substrate, making it difficult for wrinkles or bubbles to form in the long electrode stack with substrate that is formed. Furthermore, when the substrate peeling step is started, the cut portion formed by cutting a portion of the long electrode stack with substrate in the width direction is used as the starting point. Therefore, the substrate can be easily peeled from the long electrode stack with substrate without cutting the entire width of the long electrode stack with substrate. Therefore, according to the method for producing a long electrode stack of (1), it is possible to produce a long electrode stack industrially and efficiently without generating wrinkles or bubbles.

[0009] (2) In the method for producing a long electrode laminate according to (1), in the substrate peeling step, the position at which the substrate is peeled off from the long electrode laminate with substrate is between a first point, which is a position at a length equivalent to the distance from the reference position to the substrate winding roll, with the position of the substrate peeling roll being taken as the reference position, and a second point, which is a distance from the first point at a length equivalent to the diameter of the substrate winding roll.

[0010] According to the manufacturing method of the long electrode laminate (2), the position where the substrate is peeled off from the long electrode laminate with substrate is the above-mentioned position, so that the substrate peeled off from the long electrode laminate with substrate can be wound onto the substrate winding roll in a short time, and the substrate peeling process can be started more easily and in a short time.

[0011] (3) A manufacturing device for a long electrode laminate, comprising: a roll press that presses a long catalyst membrane and a long electrolyte membrane with a substrate while transporting them in the lengthwise direction to form a long electrode laminate with a substrate; a substrate peeling roll that is arranged on the substrate side of the long electrode laminate with a substrate on the downstream side in the transport direction of the long electrode laminate with a substrate and peels the substrate from the long electrode laminate with a substrate to form the long electrode laminate; a substrate take-up roll that takes up the substrate peeled from the long electrode laminate with a substrate; and a substrate peeling start unit that is provided downstream in the transport direction of the long electrode laminate, and is located between a first point that is a position equivalent to the distance from the reference position to the substrate take-up roll, with the position of the substrate peeling roll being used as a reference position, and a second point that is spaced from the first point by a length equivalent to the diameter of the substrate take-up roll.

[0012] According to the long electrode stack manufacturing apparatus of (3), when the long catalyst membrane and the long electrolyte membrane with substrate are pressed together in a roll press, the long catalyst membrane and the long electrolyte membrane are supported by the substrate, making it difficult for wrinkles or bubbles to form in the long electrode stack with substrate that is formed. Furthermore, because the substrate peeling start point is located at the above-mentioned position, the substrate peeled from the long electrode stack with substrate can be wound around the substrate take-up roll in a short time, and the substrate peeling process can be started easily and quickly. Therefore, by using the long electrode stack manufacturing apparatus of (3), it is possible to industrially and efficiently manufacture long electrode stacks without the generation of wrinkles or bubbles.

[0013] (4) The manufacturing device for a long electrode laminate according to (3), wherein the base material peeling start section is provided with a cutting tool that cuts a part of the base material in the width direction.

[0014] According to the manufacturing device for a long electrode laminate of (4), the substrate can be easily cut at the substrate peeling start portion, and therefore the process of peeling the substrate from the long electrode laminate with substrate can be started more easily and in a shorter time.

[0015] (5) The manufacturing apparatus for a long electrode laminate according to (3) or (4), wherein the long electrode laminate with the substrate is transported to the substrate peeling roll so that the substrate faces upward.

[0016] According to the manufacturing device for a long electrode laminate of (5), the substrate can be cut more easily, and therefore the process of peeling the substrate from the long electrode laminate with substrate can be started more easily and in a shorter time.

[0017] (6) The manufacturing apparatus for a long electrode laminate according to (5), further comprising a conveying roll disposed between the substrate peeling roll and the substrate peeling start portion and on the underside of the long electrode laminate.

[0018] According to the manufacturing device for a long electrode laminate of (6), the transport of the long electrode laminate is stabilized, and when the substrate peeling step is initiated, the substrate can be easily wound around the substrate take-up roll. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a method and manufacturing apparatus that can industrially and efficiently manufacture a long-sized electrode stack in which a long-sized electrolyte membrane and a long-sized electrode membrane are stacked without generating wrinkles or bubbles. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a schematic diagram showing a manufacturing apparatus for a long electrode stack according to an embodiment of the present invention. [Figure 2A] 1 is a cross-sectional view of an electrode film used in a method for producing a long electrode stack according to an embodiment of the present invention. [Figure 2B] 1 is a cross-sectional view of a substrate-attached long electrolyte membrane used in a method for producing a long electrode stack according to an embodiment of the present invention. [Figure 2C] 1 is a cross-sectional view of a long electrode laminate with a substrate obtained by a method for producing a long electrode laminate according to one embodiment of the present invention. [Figure 3A]This is a diagram explaining how to start the substrate peeling process in a manufacturing method for a long-sized electrode laminate according to one embodiment of the present invention, and is a schematic diagram showing the state in which the substrate has been peeled off from the long-sized electrode laminate with substrate. [Figure 3B] This is a diagram explaining how to start the substrate peeling process in a manufacturing method for a long-sized electrode laminate according to one embodiment of the present invention, and is a schematic diagram showing the state before the tip of the substrate peeled off from the long-sized electrode laminate with substrate is wound around the substrate winding roll. [Figure 3C] This is a diagram explaining how to start the substrate peeling process in a manufacturing method for a long-sized electrode laminate according to one embodiment of the present invention, and is a schematic diagram showing the state after the tip of the substrate peeled from the long-sized electrode laminate with substrate has been wound around a substrate winding roll. [Figure 4A] This is a diagram explaining the process of peeling off the substrate from a long-length electrode laminate with a substrate in a manufacturing method of a long-length electrode laminate according to one embodiment of the present invention, and is a schematic diagram showing the state in which a cut portion has been formed in the long-length electrode laminate with a substrate. [Figure 4B] This is a diagram explaining the process of peeling off the substrate from a long-length electrode laminate with a substrate in a manufacturing method of a long-length electrode laminate according to one embodiment of the present invention, and is a schematic diagram showing the state in which a portion of the substrate has been peeled off from the cut portion. [Figure 4C] This is a diagram explaining the process of peeling off the substrate from a long-sized electrode laminate with a substrate in a manufacturing method of a long-sized electrode laminate according to one embodiment of the present invention, and is a schematic diagram showing the state in which the substrate has been peeled off entirely in the width direction. DETAILED DESCRIPTION OF THE INVENTION

[0021] A method for manufacturing a long-sized electrode stack and an apparatus for manufacturing a long-sized electrode stack according to one embodiment of the present invention will be described below with reference to the accompanying drawings. However, the embodiment shown below is merely an example of the present invention, and the present invention is not limited to the following.

[0022] Fig. 1 is a schematic diagram showing an apparatus for manufacturing a long-sized electrode stack according to one embodiment of the present invention. Fig. 2A is a cross-sectional view of a long-sized catalyst membrane used in a method for manufacturing a long-sized electrode stack according to one embodiment of the present invention. Fig. 2B is a cross-sectional view of a long-sized electrolyte membrane with a substrate used in a method for manufacturing a long-sized electrode stack according to one embodiment of the present invention. Fig. 2C is a cross-sectional view of a long-sized electrode stack with a substrate obtained by a method for manufacturing a long-sized electrode stack according to one embodiment of the present invention.

[0023] The manufacturing apparatus 100 for a long electrode laminate shown in Figure 1 has a catalyst membrane unwinding roll 20, a first interlayer paper winding roll 25, an electrolyte membrane unwinding roll 30, a roll press machine 40, a substrate peeling roll 50, a substrate winding roll 55, a substrate peeling start section 60, a second interlayer paper unwinding roll 70, and a long electrode laminate winding roll 80.

[0024] A catalyst membrane roll 10a is disposed on the catalyst membrane unwinding roll 20. The catalyst membrane roll 10a is wound with the long catalyst membrane 10 superimposed on the first interlayer paper 13. The catalyst membrane unwinding roll 20 unwinds the long catalyst membrane 10 and the first interlayer paper 13 from the catalyst membrane roll 10a (long catalyst membrane unwinding process). As shown in FIG. 2A , the long catalyst membrane 10 is a catalyst-coated diffusion medium (CCDM) having a cathode-side catalyst layer 11 and a gas diffusion layer 12. The unwound long catalyst membrane 10 is transported to a roll press machine 40 by a first catalyst membrane transport roll 21 and a second catalyst membrane transport roll 22.

[0025] The first interlayer paper 13 is transported by the first interlayer paper transport roll 26 to the first interlayer paper take-up roll 25. The first interlayer paper 13 is taken up by the first interlayer paper take-up roll 25 to form a first interlayer paper roll 13a.

[0026] An electrolyte membrane roll 14a is disposed on the electrolyte membrane unwinding roll 30. The long electrolyte membrane 14 with substrate is unwound from the electrolyte membrane roll 14a by the electrolyte membrane unwinding roll 30 (substrate-attached long electrolyte membrane unwinding process). As shown in FIG. 2B , the long electrolyte membrane 14 with substrate is a laminate in which a substrate 15 and an electrolyte membrane 16 are stacked. In this embodiment, the long electrolyte membrane 14 with substrate is transported to the roll press machine 40 with the substrate 15 facing upward. An electrolyte membrane transport roll 31 is disposed between the electrolyte membrane unwinding roll 30 and the roll press machine 40.

[0027] The roll press machine 40 presses the long catalyst membrane 10 and the long electrolyte membrane 14 with substrate together while transporting them in the lengthwise direction, thereby forming a long electrode stack with substrate 17 (pressing process). The roll press machine 40 has a lower roll 41 and an upper roll 42. The lower roll 41 and the upper roll 42 may be, for example, heated rolls made of metal. The lower roll 41 may be a nip roll. As shown in FIG. 2C , the long electrode stack with substrate 17 has the cathode catalyst layer 11 of the long catalyst membrane 10 and the electrolyte membrane 16 pressed together. The long electrode stack with substrate 17 is transported to a substrate peeling roll 50. A substrate-attached long electrode stack transport roll 43 is arranged between the roll press machine 40 and the substrate peeling roll 50.

[0028] The substrate peeling roll 50 is disposed downstream of the roll press machine 40 in the conveyance direction of the substrate-attached long electrode laminate 17, on the substrate 15 side of the substrate-attached long electrode laminate 17. The substrate peeling roll 50 is a roll extending in the width direction of the substrate-attached long electrode laminate 17. While the substrate-attached long electrode laminate 17 is conveyed in the lengthwise direction, the substrate 15 is pulled along the substrate peeling roll 50 in a direction different from the conveyance direction of the substrate-attached long electrode laminate 17 (upward in FIG. 1 ), thereby peeling the substrate 15 and forming a long electrode laminate 18 (substrate peeling step). The pulling direction of the substrate 15 is not particularly limited, and is adjusted taking into consideration conditions such as the ease of peeling the substrate 15.

[0029] The substrate winding roll 55 is disposed above the substrate peeling roll 50. The substrate 15 peeled off by the substrate peeling roll 50 is transported to the substrate winding roll 55 by the substrate transport roll 56. The substrate 15 is wound up by the substrate winding roll 55 to form a substrate roll 15a (substrate winding step).

[0030] The substrate peeling start section 60 is a section used when starting to peel the substrate 15 from the substrate-attached long electrode laminate 17. The substrate peeling start section 60 is provided downstream of the substrate peeling roll 50 in the conveying direction of the long electrode laminate 18. The substrate peeling start section 60 is located between a first point 61, which is a position corresponding to the distance L1 from the reference position of the substrate peeling roll 50 to the substrate take-up roll, and a second point 62, which is separated from the first point 61 by a length L2 corresponding to the diameter of the substrate take-up roll 55. The substrate peeling start section 60 may be provided with a cutting tool (not shown) that cuts the substrate 15 of the substrate-attached long electrode laminate 17 in the width direction.

[0031] A first transport roll 65 is arranged between the substrate peeling roll 50 and the substrate peeling start section 60. The first transport roll 65 is arranged on the lower surface side of the long electrode laminate 18. A second transport roll 66 is arranged downstream of the substrate peeling start section 60 in the transport direction of the long electrode laminate 18. The first transport roll 65 and the second transport roll 66 are arranged so as to contact the lower surface side of the long electrode laminate 18.

[0032] The second interlayer paper roll 19a is disposed on the second interlayer paper unwinding roll 70. The second interlayer paper 19 unwound from the second interlayer paper roll 19a by the second interlayer paper unwinding roll 70 is sent to the pressing roll 71. The long electrode stack 18 and the second interlayer paper 19 are overlapped by the pressing roll 71. The overlapped long electrode stack 18 and second interlayer paper 19 are transported to the long electrode stack take-up roll 80.

[0033] The long electrode laminate take-up roll 80 takes up the long electrode laminate 18 and the second inter-layer paper 19 in an overlapping state, thereby forming the electrode laminate roll 18a (long electrode laminate winding step).

[0034] In this way, a long electrode stack 18 is produced in which the cathode catalyst layer 11 and the gas diffusion layer 12 are stacked in this order on one surface of the electrolyte membrane 16 .

[0035] Next, a method for starting the substrate peeling step will be described with reference to FIGS. 3A to 3C and 4A to 4C. FIGS. 3A to 3C are diagrams illustrating a method for starting the substrate peeling step. FIG. 3A is a schematic diagram illustrating a state in which a substrate has been peeled off from a long electrode laminate with a substrate. FIG. 3B is a schematic diagram illustrating a state before the leading end of the substrate peeled off from the long electrode laminate with a substrate is wound around a substrate take-up roll. FIG. 3C is a schematic diagram illustrating a state after the leading end of the substrate peeled off from the long electrode laminate with a substrate has been wound around a substrate take-up roll. FIGS. 4A to 4C are diagrams illustrating a step of peeling off a substrate from a long electrode laminate with a substrate. FIG. 4A is a schematic diagram illustrating a state in which a cut portion has been formed in a long electrode laminate with a substrate. FIG. 4B is a schematic diagram illustrating a state in which a portion of the substrate has been peeled off from the cut portion. FIG. 4C is a schematic diagram illustrating a state in which the substrate has been entirely peeled off in the width direction.

[0036] First, as shown in FIG. 3A, the substrate tip 15s is peeled off from the substrate-attached long electrode laminate 17. The substrate tip 15s is peeled off at a substrate peeling start section 60. First, the substrate-attached long electrode laminate 17 is transported beyond the substrate peeling start section 60, for example, to the position of the long electrode laminate take-up roll 80. Next, as shown in FIG. 4A, a portion of the substrate-attached long electrode laminate 17 is cut in the width direction to form a cut section 17c. The width direction length of the cut section 17c may be any length that does not cut the entire substrate-attached long electrode laminate 17 when transported in the length direction, and may be, for example, approximately 1 / 4 of the width of the substrate-attached long electrode laminate 17. Next, as shown in FIG. 4B, the substrate tip 15s at the cut section 17c is pulled up. Then, as shown in FIG. 4C, the substrate tip 15s is further pulled up to peel off the entire substrate 15 from the substrate-attached long electrode laminate 17 in the width direction.

[0037] 3B, the substrate tip 15s is passed between the substrate peeling roll 50 and the substrate transport roll 56. Thereafter, the substrate tip 15s is wound around the substrate winding roll 55.

[0038] 3C, the substrate take-up roll 55 is rotated to take up the substrate 15. As a result, the peeling position of the substrate 15 moves to the substrate peeling roll 50, and the substrate 15 of the substrate-attached long electrode laminate 17 is pulled along the substrate peeling roll 50 in a direction different from the conveyance direction of the substrate-attached long electrode laminate 17, so that the substrate 15 is continuously peeled off.

[0039] According to the manufacturing method of the long electrode stack of this embodiment configured as described above, when the long catalyst membrane 10 and the long electrolyte membrane 14 are pressure-bonded to each other in the pressure-bonding step, the long catalyst membrane 10 and the long electrolyte membrane 14 are supported by the substrate 15, making it difficult for wrinkles and bubbles to occur in the formed long electrode stack 17 with the substrate. Furthermore, when the substrate peeling step is started, the cut portion 17c formed by cutting a portion of the long electrode stack 17 with the substrate in the width direction is used as the starting point. This makes it possible to easily peel the substrate from the long electrode stack 17 with the substrate without cutting the entire width of the long electrode stack 17 with the substrate. Furthermore, if the position where the substrate 15 is to be peeled from the long electrode stack 17 with the substrate, at which the substrate peeling step is started, is the substrate peeling start portion 60, the substrate 15 peeled from the long electrode stack 17 with the substrate can be wound around the substrate take-up roll 55 in a short time, making it possible to start the substrate peeling step more easily and in a shorter time. Therefore, according to the method for manufacturing a long electrode stack of this embodiment, the long electrode stack 18 can be manufactured industrially and efficiently without generating wrinkles or bubbles.

[0040] According to the manufacturing apparatus 100 for a long electrode stack of this embodiment, when the long catalyst membrane 10 and the long electrolyte membrane 14 with substrate are pressure-bonded together in the roll press machine 40, the long catalyst membrane 10 and the long electrolyte membrane 14 are supported by the substrate 15, so wrinkles and bubbles are less likely to occur in the formed long electrode stack 17 with substrate. Furthermore, because the substrate peeling start section 60 is located at the above-mentioned position, the process of peeling the substrate 15 from the long electrode stack 17 with substrate can be started easily and in a short time. Therefore, by using the manufacturing apparatus 100 for a long electrode stack of this embodiment, the long electrode stack 18 can be manufactured industrially and efficiently without generating wrinkles or bubbles.

[0041] In the manufacturing apparatus 100 for a long electrode laminate of this embodiment, if the substrate peeling start section 60 is provided with a cutting tool that cuts the substrate 15 in the width direction, it becomes easier to cut the substrate 15 at the substrate peeling start section 60. This makes it possible to start the process of peeling the substrate 15 from the substrate-attached long electrode laminate 17 more easily and in a shorter time.

[0042] In the manufacturing apparatus 100 for a long electrode laminate of this embodiment, when the substrate-attached long electrode laminate 17 is transported to the substrate peeling roll 50 with the substrate 15 facing upward, the substrate 15 can be cut more easily. Therefore, the process of peeling the substrate 15 from the substrate-attached long electrode laminate 17 can be started more easily and in a shorter time.

[0043] In the manufacturing apparatus 100 for a long electrode laminate of this embodiment, when a first conveying roll 65 is provided between the substrate peeling roll 50 and the substrate peeling start section 60 and on the underside of the long electrode laminate 18, the conveyance of the long electrode laminate 18 is stabilized and, when the substrate peeling process is initiated, it becomes easier to wind the substrate tip 15s around the substrate winding roll 55.

[0044] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. In this embodiment, the long catalyst membrane 10 is a laminate in which a cathode catalyst layer 11 and a gas diffusion layer 12 are stacked, but the configuration of the long catalyst membrane 10 is not limited to this. For example, the long catalyst membrane 10 may be a single layer of the cathode catalyst layer 11. Furthermore, the long catalyst membrane 10 may be a single layer of the anode catalyst layer, or a laminate in which an anode catalyst layer and a gas diffusion layer are stacked. Furthermore, in this embodiment, the long electrode stack 18 is formed into a roll shape, but before forming it into a roll shape, an anode-side catalyst layer may be laminated on the surface of the electrolyte membrane 16 opposite to the cathode-side catalyst layer 11 side. [Explanation of symbols]

[0045] 10 Long catalytic membrane 10a Catalyst membrane roll 11 Cathode side catalyst layer 12 Gas diffusion layer 13 First layer of paper 13a First layer interleaf roll 14. Long-length electrolyte membrane with substrate 14a Electrolyte membrane roll 15 Base material 15a Base material roll 15s substrate tip 16 Electrolyte membrane 17 Long electrode laminate with substrate 18 Long electrode laminate 18a Electrode laminate roll 19 Second layer interleaf 19a Second layer interleaf roll 20 Catalyst film unwinding roll 21 First catalyst membrane transport roll 22 Second catalyst membrane transport roll 25 First layer paper winding roll 26 First layer interleaving paper transport roll 30 Electrolyte membrane unwinding roll 31 Electrolyte membrane transport roll 40 Roll press machine 41 Lower Roll 42 Upper roll 43 Roll for transporting long electrode laminate with substrate 50 Substrate peeling roll 51 Long electrode laminate transport roll 55 Substrate winding roll 56 Substrate transport roll 60 Starting point of peeling off the substrate 61 1st point 62 Second point 65 First transport roll 66 Second transport roll 70 2nd layer paper unwinding roll 71 Pressing roll 80 Long electrode laminate winding roll

Claims

1. a pressure-bonding step of compressing the long catalyst membrane and the long electrolyte membrane with substrate while transporting them in the lengthwise direction to form a long electrode stack with substrate; a substrate peeling step of peeling off the substrate by pulling the substrate along a substrate peeling roll arranged on the substrate side of the elongated electrode laminate with the substrate while transporting the elongated electrode laminate with the substrate in the longitudinal direction, thereby forming the elongated electrode laminate; a substrate winding step of winding the substrate peeled from the substrate-attached long electrode laminate onto a substrate winding roll, The method for producing a long electrode laminate, wherein the substrate peeling step is initiated by the following method. 1) Using the position of the substrate peeling roll as a reference position, a portion of the elongated electrode laminate with substrate is cut in the width direction between a first point, which is a position at a length equivalent to the distance from the reference position to the substrate winding roll, downstream in the conveying direction of the elongated electrode laminate, and a second point, which is separated from the first point by a length equivalent to the diameter of the substrate winding roll, to form a cut portion, and the substrate is peeled off from the elongated electrode laminate with substrate using the cut portion as a starting point. 2) The tip of the peeled substrate is wound around the substrate take-up roll. 3) The substrate is wound around the substrate winding roll, and the substrate is peeled from the substrate-attached long electrode laminate from the cutting portion to the substrate peeling roll.

2. a roll press machine that presses the long catalyst membrane and the long electrolyte membrane with substrate together in the lengthwise direction to form a long electrode stack with substrate; a substrate peeling roll that is disposed on the substrate side of the substrate-attached long electrode laminate downstream in the conveyance direction of the substrate-attached long electrode laminate and peels the substrate from the substrate-attached long electrode laminate to form the long electrode laminate; a substrate winding roll that winds up the substrate peeled off from the substrate-attached long electrode laminate; a substrate peeling start section located between a first point, which is provided downstream in the transport direction of the long electrode laminate and is at a position corresponding to the distance from the reference position of the substrate peeling roll to the substrate winding roll, and a second point, which is separated from the first point by a length corresponding to the diameter of the substrate winding roll,

3. The manufacturing device for a long electrode laminate according to claim 2 , wherein the substrate peeling start section is provided with a cutting tool that cuts a part of the substrate in the width direction.

4. The manufacturing apparatus for a long electrode laminate according to claim 2 or 3, wherein the long electrode laminate with substrate is transported to the substrate peeling roll so that the substrate faces upward.

5. The manufacturing device for a long electrode laminate according to claim 4 , further comprising a transport roll disposed between the substrate peeling roll and the substrate peeling start portion and on the underside of the long electrode laminate.

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