JP2009059897A - Laminating device for solar battery module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminating device which does not require any disposable peeling sheet. <P>SOLUTION: In the laminating device, a pair of welding rolls 7 and a pair of peeling rolls 8 are disposed at a section distance L in a conveyance direction A of a solar battery module 1, a sealing material 2 is welded to the solar battery module 1 by winding and putting together the solar battery module 1, sealing material 2, and peeling sheet in a gap 7c between the pair of welding rolls 7 while heating them, and they are passed through a gap 8c between the pair of release rolls 8 to peel the release sheet from the solar battery module 1 and sealing material 2. The peeling sheet is constituted as a looped peeling belt 10, which is extended between around one-side rolls 7a and 8a of the pair of welding rolls 7 and the pair of peeling rolls 8 for repetitive use, thereby preventing the sealing material 2 from sticking on the one-side rolls 7a and 8a by the peeling belt 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a solar cell module laminating device that prevents a sealing material from adhering to a transport roll in the laminating device.

  The film-like solar cell module is configured to be thin and lightweight by using a flexible film substrate, and can be installed on curved portions such as a roof and an outer wall with a high degree of freedom of attachment. However, since the solar cell module is used in an outdoor environment, it is necessary to protect the surface from rain or wind. Therefore, a protective layer is provided by laminating the surface of the solar cell module by welding a sealing material.

  The solar cell module employs a stepping roll method or a roll-to-roll method with high mass productivity. Here, a laminating apparatus that laminates the surface of the solar cell module with the sealing material in a roll-to-roll manner will be described. The laminating apparatus is configured to weld the sealing material to the solar cell module by applying pressure while melting the sealing material at a high temperature in a state where the sealing material is stacked on the surface of the solar cell module. It is carried out. In the laminating apparatus, when the pressure is applied, an operation of sandwiching the solar cell module and the sealing material with a pair of rolls is performed. However, when applying pressure, there is a possibility that the sealing material adheres to the roll that contacts the sealing material of the pair of rolls and is transferred to another member, which is not preferable. Accordingly, the release sheet is overlapped with the sealing material so that the sealing material is sandwiched between the solar cell module and the release sheet so that the sealing material does not contact the roll. Yes. Such a laminating apparatus is disclosed in Patent Document 1.

JP 2006-32811 A

  However, in the conventional solar cell module laminating apparatus, the disposable release sheet that is not used in the final product state is used, which causes an increase in waste discharged at the time of manufacture, which increases the manufacturing cost. It has become.

  Therefore, an object of the present invention is to provide a laminating apparatus that does not require a disposable release sheet.

  In order to solve the problems, the laminating apparatus of the present invention includes a pair of welding rolls and a pair of release rolls arranged at intervals in the transport direction of the solar cell module, the sealing material, and the release sheet, and the sealing sheet together with the release sheet. The solar cell module sandwiching the stopper is disposed so as to pass between the pair of welding rolls and the pair of peeling rolls, and the sealing material is interposed between the pair of welding rolls. Is laminated on the solar cell module, and the peeling sheet is moved in a direction in which the peeling sheet is peeled from the solar cell module and the sealing material at a position downstream in the conveying direction of the pair of peeling rolls. The release sheet is configured as a loop-like release belt, and the release belt is attached to one side of the pair of welding rolls and the pair of release belts. Turn over to one side of the roll, and the repeatable use.

  In the laminating apparatus of the present invention, a cooling means may be disposed at a position downstream of the pair of welding rolls in the conveying direction to cool the solar cell module, the sealing material, and the peeling belt.

  In the laminating apparatus of the present invention, the cooling means may be arranged on the peeling belt side.

  According to the laminating apparatus for the solar cell module of the present invention, the following effects can be obtained. In the laminating apparatus of the present invention, a pair of welding rolls and a pair of peeling rolls are arranged at intervals in the conveying direction of the solar cell module, the sealing material, and the release sheet, and the sealing material is sandwiched with the release sheet. The solar cell module is disposed so as to pass between the pair of welding rolls and the pair of peeling rolls, and the sealing material is disposed on the solar cell module between the pair of welding rolls. In the laminating apparatus of the solar cell module, the release sheet is moved in a direction in which the release sheet is peeled from the solar cell module and the sealing material at a position downstream of the transport direction of the pair of release rolls. It is configured as a loop-shaped peeling belt, and the peeling belt is hung on one side of the pair of welding rolls and one side of the pair of peeling rolls. Rotate, it is to be used repeatedly. Therefore, the peeling belt rotates along the rolls on the one side, and repeatedly passes between the pair of welding rolls and the pair of peeling rolls, and the sealing material together with the solar cell module. It becomes possible to prevent the sealing material from sticking to the respective one-side rolls. Therefore, the peeling belt is not thrown away, the waste discharged at the time of manufacture is reduced, and the manufacturing cost of the solar cell module can be reduced.

  In the laminator for solar cell module of the present invention, a cooling means is disposed at a position downstream of the pair of welding rolls in the conveying direction to cool the solar cell module, the sealing material, and the peeling belt. In addition, the cooling means may be arranged on the release sheet side. Therefore, the film substrate, the sealing material, and the peeling belt are quickly cooled, and the cooling time until the molten sealing material is solidified is shortened. Therefore, even when the section distance between the pair of welding rolls and the pair of peeling rolls is shortened, the sealing material is in a substantially solid state when the peeling belt is peeled off, It becomes difficult for the sealing material to adhere. Therefore, the section distance between the pair of welding rolls and the pair of peeling rolls is shortened, so that the laminating apparatus is miniaturized, the time required for the laminating process is shortened, and the production efficiency of the solar cell module is reduced. Will be improved.

  Embodiments of the present invention will be described below. FIG. 1 shows a schematic structure of a solar cell module 1 in a cross-sectional view. When FIG. 1 is described with the direction indicated by the arrow U as the upper direction, the sheet-like solar cell module 1 has the back metal electrode 1b superimposed on the upper surface of the film substrate 1a and the back metal on the lower surface of the film substrate 1a. The electrodes 1c are arranged so as to overlap each other. Further, the solar cell module 1 is arranged such that the photoelectric conversion element 1d is overlaid on the upper side of the back surface metal electrode 1b, and the transparent electrode 1e is overlaid on the upper side of the photoelectric conversion element 1d.

  FIG. 2 shows a schematic view of a laminating apparatus 3 for laminating the solar cell module 1 with the sealing material 2. In FIG. 2, the direction indicated by the arrow U is the upper direction, and the direction indicated by the arrow A is the transport direction of the solar cell module. The laminating apparatus 3 mainly includes an unwinding roll 4, a winding roll 5, a sealing material unwinding roll 6, a pair of welding rolls 7, a pair of peeling rolls 8, and a plurality of guide rolls 9. The unwinding roll 4 and the winding roll 5 are arranged in parallel along the rotation direction and at a distance from each other in the transport direction A. Further, the sealing material unwinding roll 6 is arranged at a distance above the unwinding roll 4. Further, in the section between the unwinding roll 4 and the winding roll 5, a pair of welding rolls 7, a pair of peeling rolls 8 and a plurality of guide rolls 9 are arranged along the rotation direction of each roll, and The unwinding roll 4 and the winding roll 5 are arranged in parallel.

  The pair of welding rolls 7 are arranged at an intermediate height between the unwinding roll 4 and the sealing material unwinding roll 6 at a distance from the unwinding roll 4 and the sealing material unwinding roll 6 in the transport direction A, An upper welding roll 7a and a lower welding roll 7b are provided. The upper welding roll 7a is disposed substantially vertically above the lower welding roll 7b with a gap 7c therebetween. The pair of peeling rolls 8 is disposed with a section distance L from the pair of welding rolls 7 in the transport direction A, and includes an upper peeling roll 8a and a lower peeling roll 8b. The upper release roll 8a is arranged with a gap 8c therebetween substantially vertically above the lower release roll 8b. A plurality of guide rolls 9 are disposed above the upper welding roll 7a and the upper peeling roll 8a, and a loop-shaped peeling belt 10 is provided on the upper welding roll 7a, the upper peeling roll 8a, and the plurality of guide rolls 9. It is laid around.

  The laminating apparatus 3 includes a sheet-like solar cell module 1 and a sheet-like sealing material 2. Both ends of the solar cell module 1 are wound around the unwinding roll 4 and the winding roll 5, respectively, and a gap 7 c between the pair of welding rolls 7 and a pair of peeling in the section between the unwinding roll 4 and the winding roll 5. It arrange | positions so that the clearance gap 8c of the roll 8 may be passed. One end of the sealing material 2 is wound around the sealing material unwinding roll 6, and the other end of the sealing material 2 is wound along with the solar cell module 1 onto the winding roll 5, and the sealing material unwinding roll 6 and the winding roll 5 are arranged so as to pass through the gap 7c between the pair of welding rolls 7 and the gap 8c between the pair of peeling rolls 8, and further, the pair of welding rolls 7 and the pair of peelings. In the section between the roll 8, the solar cell module 1 and the peeling belt 10 are sandwiched.

  The laminating apparatus 3 includes cooling fans 11 and 12, and the cooling fans 11 and 12 are solar cell modules 1 that are conveyed in a section between a pair of welding rolls 7 and a pair of peeling rolls 8, and a sealing material. 2 and the peeling belt 10 are arranged above and below.

  Furthermore, the process of laminating the solar cell module 1 with the sealing material 2 is demonstrated using FIG. The solar cell module 1 is unwound in the transport direction A while the unwinding roll 4 is rotated, and the sealing material 2 is unwound in the transport direction A while the sealing material unwinding roll 6 is rotated. The solar cell module 1 and the sealing material 2 are guided to the pair of welding rolls 7 and overlap each other when inserted into the gap 7 c between the pair of welding rolls 7. The peeling belt 10 is overlapped. The pair of welding rolls 7 is rotated while applying pressure to sandwich the solar cell module 1, the sealing material 2 and the peeling belt 10 in the vertical direction, and the sealing material 2 is welded to the solar cell module 1. Further, the solar cell module 1, the sealing material 2, and the peeling belt 10 are fed with cold air from the cooling fans 11 and 12 through a section between the pair of welding rolls 7 and the pair of peeling rolls 8 in an integrated state. Then, it is conveyed while being cooled, passes through the gap 8c between the pair of peeling rolls 8, and then the peeling belt 8 moves upward away from the solar cell module 1 to which the sealing material 2 is welded. The solar cell module 1 to which the sealing material 2 is welded is taken up by the take-up roll 5, and the peeling belt 10 is guided by the plurality of guide rolls 9 and passes through the gap 7 c between the pair of weld rolls 7 again.

  Accordingly, the peeling belt 10 rotates along the upper welding roll 7a, the upper peeling roll 8a, and the plurality of guide rolls 9, and repeatedly passes through the gap 7c between the pair of welding rolls 7 and the gap 8c between the pair of peeling rolls 8. And the sealing material 2 is inserted | pinched with the solar cell module 1, and it prevents that the sealing material 2 adheres to the upper side welding roll 7a and the upper side peeling roll 8a. Therefore, the peeling belt 10 is not thrown away, and the manufacturing cost of the solar cell module 1 can be reduced.

  Moreover, the cooling fan 11 is arrange | positioned above the solar cell module 1, the sealing material 2, and the peeling belt 10 which are passing the area between a pair of welding roll 7 and a pair of peeling roll 8, and a pair It is possible to efficiently cool the sealing material 2 and the peeling belt 10 heated by the welding roll 7 and shorten the time required for cooling until the melted sealing material 2 is solidified. Therefore, even if the section distance L between the pair of welding rolls 7 and the pair of peeling rolls 8 is shortened, the sealing material 2 is in a substantially solid state when the peeling belt 10 is peeled off. It becomes difficult for the sealing material 2 to adhere to the surface. Therefore, by shortening the section distance L, the laminating apparatus 3 can be downsized, the time required for laminating can be shortened, and the production efficiency of the solar cell module 1 can be increased.

  FIG. 3 shows a cross-sectional view of a state in which the solar cell module 1, the sealing material 2, and the peeling belt 10 are integrated in a section between the pair of welding rolls 7 and the pair of peeling rolls 8. When FIG. 3 is described with the direction indicated by the arrow U as the upper direction, the sealing material 2 is disposed on the solar cell module 1, and the peeling belt 10 is further disposed on the sealing material 2. The sealing material 2 is made of EVA (ethylene vinyl acetate) and is welded to the solar cell module 1. The peeling belt 10 is made of a glass cloth impregnated with a fluororesin, and is a material having good releasability from the sealing material 2.

  In the present embodiment, the direction of each component is specifically specified and shown. However, the direction is not limited to the specified direction, and the direction is not limited to the specific direction. It is understood that it can be implemented. For example, the conveying direction A may be a vertical height direction, or the sealing material 2 is disposed below the solar cell module 1 and the peeling belt 10 is disposed below the sealing material 2. It may be.

  In another embodiment, the sealing material 2 made of EVA may be made of other materials if possible.

  In other embodiments, other materials can be used for the release belt 10. For example, an acrylic silicon resin material can be used.

  In another embodiment, only the cooling fan 11 on the peeling belt 10 side among the cooling fans 11 and 12 may be arranged, and the number of arranged cooling fans 11 can be suppressed to the minimum number, and the number of parts can be reduced. Become. Moreover, you may arrange | position only the cooling fan 12 by the side of the solar cell module 1 among the cooling fans 11 and 12. FIG. Further, other cooling devices may be used instead of the cooling fan.

  In another embodiment, the peeling belt 10 may be washed in a section where the peeling belt 10 is guided by a plurality of guide rolls 9. In addition, it is possible to lengthen the cycle of the peeling belt 10 by making the section where the peeling belt 10 is guided by the plurality of guide rolls 9 long and detouring. Therefore, the number of times the same part is repeatedly used can be reduced, and the durability of the peeling belt 10 can be improved.

Sectional drawing of the structure of a solar cell module is shown. It is the schematic which looked at the structure of the lamination apparatus from the side surface along a conveyance direction. Sectional drawing of the solar cell module, the sealing material, and peeling belt which are integrally formed in the area between a pair of welding roll and a pair of peeling roll is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solar cell module 1a Film substrate 1b Back surface metal electrode 1c Back surface metal electrode 1d Photoelectric conversion element 1e Transparent electrode 2 Sealing material 3 Laminating device 4 Unwinding roll 5 Winding roll 6 Sealing material unwinding roll 7 A pair of welding rolls 7a Upper welding roll 7b Lower welding roll 7c Gap 8 A pair of peeling rolls 8a Upper peeling roll 8b Lower peeling roll 8c Gap 9 Multiple guide rolls 10 Peeling belts 11, 12 Cooling fan

A Transport direction U Upper direction L Section distance

Claims (3)

A solar cell module, a pair of welding rolls and a pair of release rolls are arranged at intervals in the conveying direction of the sealing material and the release sheet, and the solar cell module sandwiching the sealing material together with the release sheet, It arrange | positions so that it may pass between between a pair of welding rolls, and between a pair of said peeling roll, the said sealing material is welded on the said solar cell module between a pair of said welding rolls, and said pair In the laminating apparatus of the solar cell module in which the release sheet is moved in the direction of peeling from the solar cell module and the sealing material at a position downstream of the peeling roll in the conveying direction,
The release sheet is configured as a loop-like release belt, and the release belt is wound around one side of the pair of welding rolls and one side of the pair of release rolls so that it can be used repeatedly. Battery module laminating equipment.   2. The solar cell according to claim 1, wherein a cooling unit is disposed at a position downstream of the pair of welding rolls in the conveying direction to cool the solar cell module, the sealing material, and the peeling belt. Module laminating equipment.   The said cooling means is arrange | positioned at the said peeling belt side, The lamination apparatus of the solar cell module of Claim 2 characterized by the above-mentioned.

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