CN215921268U - Film paving device and solar cell welding and film paving system - Google Patents

Abstract

The utility model relates to a film laying device and a solar cell welding and film laying system. The film laying device comprises a film strip supply unit and a film laying unit. The film tape supply unit includes: a film supply roll on which a film roll of a light redirecting film is mounted; and a first cutter disposed on a transport path of the light redirecting film and configured to cut the light redirecting film into a plurality of film strips along a longitudinal direction of the light redirecting film. The film belt is conveyed to the film laying unit through the film belt conveying unit. The solar cell welding and film laying system comprises the film laying device. The film laying device and the solar cell welding and film laying system can divide the light redirecting film into film strips with proper width on line and convey the film strips to the film laying unit without rewinding, packaging, transporting, installing and the like of the divided film strips, so that the efficiency can be improved, the cost can be reduced, and the film strips can be prevented from being damaged in the process.

Description

Film paving device and solar cell welding and film paving system

Technical Field

The utility model relates to the field of solar cells, in particular to a film paving device and a solar cell welding and film paving system with the film paving device.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

In existing solar cell modules, light redirecting films are typically laid down on adjacent solar cells on a substrate, for example, on the ribbons of a string of solar cells connected with ribbons, to increase the power generation efficiency of the solar cells. In the existing laying process of the light redirecting film, a single wide film roll with a large width of the light redirecting film is generally cut into a plurality of narrow film rolls with a small width, and then the narrow film rolls are mounted on a supply roll of a film laying device of the solar cell to be conveyed and laid into the solar cell unit. In the slitting process of the film roll, the light redirecting film on the wide film roll is usually required to be unwound and then cut into the narrow light redirecting film, and then the cut narrow light redirecting film is respectively rewound, packaged, transported and the like, so that the process is complicated, and the light redirecting film slit in the processes can be damaged, and the cost is high. In addition, in the film laying process, each narrow film roll needs to be installed on the feeding roller respectively, and film loading and film changing operations need to be carried out for multiple times.

Therefore, the existing light redirecting film laying device needs to be improved so as to simplify the operation of the film laying process and improve the laying efficiency of the light redirecting film.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to achieve on-line slitting of light redirecting films to improve the efficiency of laying of the light redirecting films. Another object of the present invention is to further simplify the structure of the film laying device of the solar cell welding and film laying system and further improve the laying efficiency.

One aspect of the present invention is to provide a film laying device including a film tape supply unit and a film laying unit. The film tape supply unit includes: a film supply roll on which a film roll of a light redirecting film is mounted; and a first cutter disposed on a transport path of the light redirecting film and configured to cut the light redirecting film into a plurality of film strips along a longitudinal direction of the light redirecting film. The film belts are conveyed to the film laying unit through the film belt conveying unit.

In one embodiment, the film tape supply unit further comprises: a position detector disposed to detect a position of the light redirecting film paid out from the film supply roll; and a position adjuster configured to adjust a position of the light redirecting film based on a detection result of the position detector to cause the light redirecting film to be conveyed to the first cutter along a predetermined path.

The film paving unit comprises a first film paving unit, the film belt conveying unit comprises a first film belt conveying unit, and a first part of the film belts in the plurality of film belts are conveyed to the first film paving unit through the first film belt conveying unit.

The first film strip conveying unit comprises one or more first conveying lines, the number of the first conveying lines is equal to the number of the first film strips, and each first conveying line is arranged to convey one film strip to the first film paving unit.

Each of the plurality of first conveying lines includes: an introducing roller configured to introduce one of the plurality of film tapes into the first conveying line; a first reversing roller having a rotation axis parallel to the rotation axis of the introducing roller and arranged to change a conveying direction of one film tape; the first reversing roller conveys a film belt to the second reversing roller, and the rotation axis of the second reversing roller is perpendicular to the rotation axis of the first reversing roller so as to change the conveying direction of the film belt; and the rotation axis of the output roller is parallel to the rotation axis of the second reversing roller, the second reversing roller conveys the film belt to the output roller, and the output roller conveys the film belt to the first film paving unit.

The second reversing roller is arranged to be movable relative to the first reversing roller and the output roller to adjust the tension of the film strip.

In one embodiment, the film laying unit further comprises a second film laying unit, and the film strip conveying unit further comprises a second film strip conveying unit, and a second part of the plurality of film strips is conveyed to the second film laying unit through the second film strip conveying unit.

The second film strip conveying unit comprises a plurality of second conveying lines, the number of the second conveying lines is equal to the number of the second partial film strips, and each second conveying line is arranged to convey one film strip to the second film paving unit.

In one embodiment, the arrangement of the second conveyor line is the same as the arrangement of the first conveyor line.

In one embodiment, the number of second transfer lines is different from the number of first transfer lines.

The film tape includes a glue layer, a film layer, and a backing layer, one side surface of the film layer being attached to the backing layer, and the other side surface of the film layer being attached to the glue layer. The film laying unit comprises: a plurality of laying heads to which a plurality of film strips are respectively conveyed; a second cutter configured to cut the film tape in a width direction of the film tape such that both the glue layer and the film layer of the film tape are cut off, and the backing layer is not cut off; and a backing layer recovery roller configured to wind the backing layer of the film tape.

In one embodiment, the second cutter is a laser cutter.

Another aspect of the present invention is to provide a solar cell soldering and sheeting system. This solar cell welding and shop membrane system includes: a solar cell sheet supply device; and a welding device, wherein the solar cell sheet supply device supplies the solar cell sheets to the welding device, and the welding device is used for laying and welding a plurality of welding strips on the surface of the solar cell sheets. The solar cell welding and film laying system further comprises a film laying device according to the utility model, the solar cell slices welded with the welding strips are conveyed to the film laying device, and the film laying units of the film laying device lay the film strips to the corresponding welding strips respectively.

In one embodiment, the second cutter of the film laying unit is configured to cut the film strip between adjacent solar cell sheets.

In one embodiment, a solar cell welding and filming system includes a first welding filming line and a second welding filming line, and a film strip supply unit of a filming device supplies a film strip to the first welding filming line and the second welding filming line.

According to the film laying device and the solar cell welding and film laying system, the light redirecting film with larger width can be cut into the film strips with proper width on line and conveyed to the film laying unit, the cut film strips do not need to be rewound, packaged, transported, installed and the like, the efficiency can be improved, the cost can be reduced, and the possible damage to the film strips in the process of rewinding, packaging, transporting, installing and the like can also be avoided. In addition, the film supply device can simultaneously supply the half-cut film strips to the film paving units of a plurality of welding and film paving production lines respectively, so that the structure of the film paving device can be simplified, and the efficiency is further improved.

Drawings

Embodiments of the utility model will now be described, by way of example only, with reference to the accompanying drawings. In the drawings, like features or components are designated with like reference numerals, and the drawings are not necessarily drawn to scale, and wherein:

FIG. 1 shows a schematic plan view of a solar cell soldering and film laying system according to the present invention;

FIG. 2 shows a schematic side view of the solar cell soldering and film coating system shown in FIG. 1;

fig. 3 shows a schematic view of a solar cell soldering and film laying system according to the utility model, seen in the direction opposite to the transport direction X of the solar cell sheets, showing the film laying means of the solar cell soldering and film laying system; and

FIG. 4 shows the structure of a light redirecting film suitable for use in a sheeting apparatus according to the present invention.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, like reference numerals indicate like or similar parts and features. The drawings are only schematic representations of the concepts and principles of embodiments of the present invention, and do not necessarily show the specific dimensions and proportions of the various embodiments of the utility model. Certain features that are part of a particular figure may be used in an exaggerated manner to illustrate relevant details or structures of embodiments of the present invention.

In the description of the embodiments of the present invention, terms used to indicate orientation or positional relationship with "up", "down", "left", "right", "front", "rear", and the like are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Fig. 1 shows a schematic view of a solar cell soldering and filming system 1 according to the utility model. The solar cell welding and film laying system 1 comprises a solar cell sheet supply device 10, a welding device, a film laying device and an unloading device. The solar cell sheet supply apparatus 10 includes a storage section 11 and a dispensing section 13. The storage section 11 stores a plurality of solar cells. The dispensing portion 13 takes out the solar cells in the storage portion 11 and dispenses them to the soldering apparatus. The dispensing portion 13 may employ, for example, an automated robotic dispensing device. The welding device is arranged to lay and weld a plurality of welding strips on the surface of the solar cell slice so as to be used for electrically connecting the solar cell slices together. The solar cell slices welded with the welding strips are conveyed to a film paving device. The film laying device is arranged to lay film strips of the light redirecting film onto solder strips on the surface of the solar cell sheet, respectively. After laying down the film strips of the light redirecting film, the solar cell sheets are transported to an unloading device. And at the unloading device, unloading and detecting the solar cell pieces of the film strips with the light redirection films laid on the welding strips, and packaging the qualified solar cell pieces for sale or use.

In the example shown in fig. 1, the welding device includes a first welding device 30 and a second welding device 30A arranged side by side, the film laying device includes a first film laying device 50 and a second film laying device 50A, and the unloading device includes a first unloading device 70 and a second unloading device 70A, so that the solar cell welding and film laying system 1 is provided with two parallel welding film laying lines, i.e., a first welding film laying line a1 and a second welding film laying line a 2. The dispensing part 13 takes out the solar cells in the storage part 11 and dispenses the solar cells to the first welding and film laying line a1 and the second welding and film laying line a 2. The first welding and film laying line a1 includes a first welding device 30, a first film laying device 50, and a first unloading device 70, and the second welding and film laying line a2 includes a second welding device 30A, a second film laying device 50A, and a second unloading device 70A. In the example shown in the figures, the first welding lay-up line a1 and the second welding lay-up line a2 are substantially identical welding lay-up lines. However, the present invention is not limited thereto. In other examples according to the utility model, the first welding and sheeting line a1 and the second welding and sheeting line a2 may be different from each other and/or the solar cell welding and sheeting system 1 may be provided with more or fewer welding and sheeting lines.

Fig. 2 shows a schematic side view of a solar cell soldering and sheeting system 1, showing a first soldering and sheeting line a1, without the solar cell sheet supply apparatus 10. Fig. 3 shows a schematic view of the solar cell soldering and sheeting system 1 viewed in a direction opposite to the transport direction X of the solar cell sheets, showing the sheeting device of the solar cell soldering and sheeting system 1.

As shown in fig. 2, the first welding device 30 includes a first solder ribbon laying unit 31 and a first welding unit 33. The first solder ribbon laying unit 31 lays solder ribbons on the surface of the solar cell sheet. Thereafter, the first soldering unit 33 heats the solder ribbon and solders the solder ribbon to the surface of the solar cell so that the plurality of solar cells are electrically connected into a cell string through the solder ribbon. As shown in fig. 2, in the conveying direction X of the solar cell, the first solar cell C11 is electrically connected to the second solar cell C12 through the first group of solder ribbons H1, a portion of each solder ribbon of the first group of solder ribbons H1 is soldered to the lower surface of the first solar cell C11, and another portion of each solder ribbon of the first group of solder ribbons H1 is soldered to the upper surface of the second solar cell C12. Similarly, the second solar cell piece C12 is electrically connected with the third solar cell piece C13 through the second group solder strip H2, the third solar cell piece C13 is electrically connected with the fourth solar cell piece C14 through the third group solder strip H3, and the fourth solar cell piece C14 is electrically connected with the fifth solar cell piece C15 through the fourth group solder strip H4, so that the plurality of solar cell pieces are electrically connected into a cell string. The solar cell sheet to which the solder ribbon is soldered is conveyed from the first soldering device 30 to the first film laying device 50.

The first film laying device 50 is disposed downstream of the first welding device 30 in the conveying direction X of the solar cell pieces, and is configured to attach a film tape of the light redirecting film to a target laying site. In this example, the target placement site is a solder ribbon on the surface of the solar cell sheet. However, the utility model is not limited thereto, and the first film-laying device 50 according to the utility model may also be used for laying a film strip of light-redirecting film to other target laying sites. Preferably, the light redirecting film is an ultra-thin light redirecting film to avoid adverse effects in stress due to excessive thickness of the light redirecting film during subsequent processing.

As shown in fig. 2 and 3, the film laying device includes a film tape supply unit 51, a film tape conveying unit, and a film laying unit. The film tape supply unit 51 is configured to supply a plurality of film tapes having an appropriate width to the film tape conveying unit, and the film tapes are conveyed to the film laying unit via the film tape conveying unit to be laid on the solder tapes on the solar cell sheets.

As shown in fig. 2 and 3, the film tape supply unit 51 includes a film supply roller 511, a position detector 512, a position adjuster 513, and a first cutter 514. A single roll of film wound from the light redirecting film is mounted on the film supply roll 511. FIG. 4 shows a cross-sectional view of a light redirecting film M, showing the structure of the light redirecting film M. As shown in fig. 4, the light redirecting film M includes a glue layer M1, a film layer M2, and a backing layer M3. One side surface of the film layer M2 was attached to the glue layer M1, and the other side surface of the film layer M2 was attached to the backing layer M3. In the preferred embodiment, the adhesive layer M1 is a heat sensitive adhesive layer, and the adhesive layer M1 generates tackiness only when the temperature reaches a predetermined temperature or higher. The film layer M2 can reflect the sunlight irradiated on the surface thereof, so that the reflected sunlight is projected on the surface of the solar cell sheet to increase the power generation efficiency of the solar cell. Film M2 may be, for example, an aluminum film. A single roll of film wound with a light redirecting film M of greater width is mounted on the film supply roll 511 with the backing layer M3 facing outward to provide protection for the film layers.

The light redirecting film M is paid out from the film supply roll 511 and conveyed to the first cutter 514 downstream for slitting. To ensure proper positioning of the light redirecting film M at the first cutter 514, a position detector 512 and a position adjuster 513 are provided between the film supply roll 511 and the first cutter 514. The position detector 512 is provided to detect the position of the light redirecting film M discharged from the film supply roller 511. The position detector 512 may employ two sensors respectively disposed on both sides of the conveyance path of the light redirecting film M to detect the position of the light redirecting film M. The position adjuster 513 is provided to adjust the position of the light redirecting film M in accordance with the detection result of the position detector 512 so that the light redirecting film M is conveyed to the first cutter 514 along a predetermined path in order to accurately cut the light redirecting film M at the first cutter 514.

The first cutter 514 is provided to cut the glue layer M1, the film layer M2, and the backing layer M3 of the light redirecting film M all through in the longitudinal direction Y of the light redirecting film M to cut the light redirecting film M into a plurality of film strips. For example, a wide width light redirecting film M paid out from a film supply roll 511 may be slit into 10-16 film strips L by a first cutter 514. The structure of the film strips L is the same as that of the light redirecting film M, only the width is reduced. Thus, the film tape L also includes a glue layer M1, a film layer M2, and a backing layer M3. The first cutter 514 includes a pressing roller 5141 and a cutting roller 5142. The pressing roller 5141 and the cutting roller 5142 are disposed perpendicularly to the conveying direction (i.e., the longitudinal direction Y) of the light redirecting film M and are respectively located on opposite sides of the light redirecting film M. The pressure roller 5141 faces the backing layer M3 of the light redirecting film M and the cutting roller 5142 faces the glue layer M1 of the light redirecting film M. The outer circumferential surface of the cutting roller 5142 is provided with a plurality of annular cutting edges spaced apart from each other. If the light redirecting film M is slit into N film strips L, the number of annular cutting edges is N-1, and the interval between adjacent annular cutting edges in the width direction of the light redirecting film M is equal to the width of the slit film strips L. The width of the film strip L is the same as the width of the respective solder strip to which it is laid.

The slit film belt L with proper width is conveyed to the film laying unit through the film belt conveying unit. The film supply unit 51 is configured as an in-line slit supply unit. The light redirecting film M having a large width is paid out from a single film roll and is slit into a plurality of film strips L having a suitable width on line, and the film strips L are supplied to the respective film strip conveying units to be conveyed to the film laying unit, respectively, without rewinding, packaging, transporting, installing, etc. the slit film strips L, therefore, it is possible to significantly improve efficiency, reduce costs, and also avoid possible damage to the slit film strips during rewinding, packaging, transporting, etc.

As shown in fig. 2 and 3, the first film laying device 50 includes a film tape supply unit 51, a first film tape conveying unit 53, and a first film laying unit 55. The first partial film tape L of the film tape L having an appropriate width after being slit by the first cutter 514 is supplied to the first film tape conveying unit 53. The first film tape conveying unit 53 is provided for conveying the slit film tape L having an appropriate width to the first film laying unit 55. The first film tape conveying unit 53 is provided with one or more first conveying lines, the number of which is equal to the number of the first partial film tapes L. Each first conveyor line is arranged to convey one film strip to a corresponding laying head of the first film laying unit 55. Each first transfer line includes a take-in roller 531, a first reversing roller 532, a second reversing roller 533, and an output roller 534.

The introducing roller 531 is provided to introduce the cut one film tape L into the conveying line. The rotation axis of the first reverse roller 532 is parallel to the rotation axis of the drawing roller 531, and is disposed to be spaced apart from the drawing roller 531 in the horizontal direction to change the conveying direction of the film tape L. In the example shown in fig. 3, the first direction-changing roller 532 changes the conveying direction of the film tape L conveyed from the first cutter 514 to the introducing roller 531 from the vertical direction to the horizontal direction.

The second direction-changing roller 533 is disposed to be spaced apart from the first direction-changing roller 531 in the vertical direction, and the rotational axis of the second direction-changing roller 533 is perpendicular to the rotational axis of the first direction-changing roller 532 to change the conveying direction of the film tape L. As shown in fig. 3, between the drawing-in roller 531 and the first reverse roller 532, the film tape L is conveyed in the horizontal direction, and the backing layer M3 and the adhesive layer M3 of the film tape L are oriented in the up-down direction; between the first and second reversing rollers 532 and 533, the film tape L is conveyed vertically, and since the rotation axis of the second reversing roller 533 is perpendicular to the rotation axis of the first reversing roller 532, when the film tape L is conveyed to the second reversing roller 533, the film tape L is twisted by 90 degrees, and the backing layer M3 and the glue layer M1 of the film tape L are oriented in the front-rear direction (the direction perpendicular to the paper surface in fig. 3).

The film web L is conveyed from the second reversing roller 533 to the output roller 534. The axis of rotation of the output roller 534 is parallel to the axis of rotation of the second reversing roller 533. In order to provide the film tape L with an appropriate tension, the second reversing roller 533 is also provided to be movable between the first reversing roller 532 and the output roller 534, and the amount of the roll of the film tape L is adjusted, thereby adjusting the tension on the film tape L. The output roller 534 is provided to convey the film tape L to the first film laying unit 55.

In the embodiment shown in fig. 1-3, the first lay-up unit 55 of the first welding lay-up film line a1 is provided with 5 lay-up heads, the film supply unit 51 divides the light-redirecting film M on the film supply roll 511 into 10 film strips L, 5 of the 10 film strips L are introduced into the first film strip conveying unit 53, and the first film strip conveying unit 53 is provided with 5 first conveying lines. As shown in fig. 3, the 5 first transfer lines of the first film tape transfer unit 53 are spaced apart from each other. These 5 first transport lines may share the same lead-in roller 531 of larger width. Alternatively, the 5 first conveying lines may have respective lead-in rollers. The second deflecting rollers 533 of the 5 first conveyor lines are supported at a distance from each other on the first bar 536 via respective swing bars 535. The second reversing roller 533 can be rotated relative to the first lever 536 to adjust the tension on the film tape L. The output rollers 534 of the 5 first conveyor lines are supported on a second rod 537 in a spaced apart manner. Alternatively, the second diverting rollers 533 of the 5 first conveyor lines may not be provided on the same bar, but may be arranged staggered with respect to each other, and/or the second diverting rollers 533 of the 5 first conveyor lines may also be staggered with respect to each other.

Each of the output rollers 534 conveys the film tape L to the first film laying unit 55 to be laid on the solder tape on the surface of the solar cell sheet. The first film-laying unit 55 may employ a conventional film-laying unit. As shown in fig. 2 and 3, the first filming unit 55 includes a guide roller 551, a laying head 552, a second cutter 553, and a backing layer recovery roller 554, wherein the second cutter 553 and the backing layer recovery roller 554 are only shown in fig. 2, but not in fig. 3. The guide rollers 551 introduce the film tape L into the film laying unit 55 and convey to the respective laying heads 552 such that the backing layer M3 of the film tape L faces the laying heads 552 and the glue layer M1 of the film tape L faces the solder tape on the surface of the solar cell sheet. Fig. 3 shows that the laying heads 552 of the first film laying unit 55 press the film tape L onto the solder tapes of the first set of solder tapes H1 on the solar cell sheet C12, i.e., the first solder tape H11, the second solder tape H12, the third solder tape H13, the fourth solder tape H14 and the fifth solder tape H15. The residual temperature of the solder ribbon on the solar cell sheet transferred from the first soldering unit 33 to the first filming device 50 makes the adhesive layer M1 of the film tape L2 sticky, so that the film tape L is adhered to the corresponding solder ribbon.

When the film tape L has completely covered the corresponding solder ribbon, for example, when the length of the film tape L laid on the solder ribbon is equal to the length of the solder ribbon, the second cutter 553 half-cuts the film tape L, cutting the glue layer M1 and the film layer M2 of the film tape L, without cutting the backing layer M3. In one example, the second cutter 553 is a laser cutter. In order to avoid adverse effects on the solar cell sheet (for example, marking of the surface of the solar cell sheet by the laser) when the film tape L is half-cut, it is preferable that the second cutter 553 half-cut the film tape L at the gap between the adjacent solar cell sheets.

When the glue layer M1 of the film tape L is adhered to the solder tape, the film layer M2 of the film tape L is tightly attached to the solder tape via the glue layer M1, and the film layer M2 is separated from the backing layer M3. The backing layer M3 was wound onto backing layer take-up roll 554 (see fig. 2).

As shown in fig. 3, the second film laying device 50A includes a film tape supply unit 51, a second film tape conveying unit 53A, and a second film laying unit 55A. The second partial film tape L of the film tape L having an appropriate width after being slit by the first cutter 514 is supplied to the second film tape conveying unit 53A. The second film tape conveying unit 53A is provided for conveying the slit film tape L having an appropriate width to the second film laying unit 55A. The second film tape conveying unit 53A is provided with one or more second conveying lines, the number of which is equal to the number of the second partial film tapes L. Each second conveyor line is arranged to convey one film strip to a corresponding laying head of the second film laying unit 55A. The second transfer line has the same configuration as the first transfer line, and includes a take-in roller 531A, a first direction changing roller 532A, a second direction changing roller 533A, and an output roller 534A. Fig. 3 shows that the laying heads of the second film laying unit 55A press-fit the film tape L onto the solder tapes on the solar cell sheet C22. The configuration of the second welding lay-up line a2 is substantially the same as that described above for the first welding lay-up line a1, and therefore, a description of the above-described portions of the second welding lay-up line a2 will not be repeated.

In a preferred example according to the present invention, the film tape supply unit 51 of the film laying device supplies the film tape L having an appropriate width to the first welding and film laying line a1 and the second welding and film laying line a2, respectively. Through the arrangement, the structure of the film laying device can be simplified, and the film laying efficiency can be further improved.

After the film tape L is laid on each solder ribbon on the surface of the solar cell sheet, the solar cell string on the first solder filming line a1 is conveyed from the first filming device 50 to the first unloading device 70, and the solar cell string on the second solder filming line a2 is conveyed from the second filming device 50A to the second unloading device 70A. At the first and second unloading devices 70 and 70A, the solar cell string is unloaded for inspection. The strings of qualified solar cells may be packaged for subsequent use.

The film laying device and the solar cell welding and film laying system according to the preferred embodiment of the utility model are described above.

According to the film laying device and the solar cell welding and film laying system, the light redirecting film with larger width can be cut into the film strips with proper width on line and conveyed to the film laying unit, the cut film strips do not need to be rewound, packaged, transported, installed and the like, the efficiency can be improved, the cost can be reduced, and the possible damage to the film strips in the process of rewinding, packaging, transporting, installing and the like can also be avoided. In addition, the film supply device can simultaneously supply the slit film belts to the film paving units of a plurality of welding and film paving production lines respectively, so that the structure of the film paving device can be simplified, and the efficiency can be further improved.

In the above preferred embodiment according to the present invention, the film tape conveying unit of the film laying device includes the first film tape conveying unit 53 and the second film tape conveying unit 53A, and the film laying unit of the film laying device includes the first film laying unit 55 and the second film laying unit 55A. A first part of the film tape L having an appropriate width cut by the first cutter 514 is conveyed to the first film laying unit 55 of the first welding and film laying line a1 by the first film tape conveying unit 53, and a second part of the film tape L is conveyed to the second film laying unit 55A of the first welding and film laying line a1 by the second film tape conveying unit 53A. The first welding and filming line a1 and the second welding and filming line a2 have the same configuration, 5 solder strips are welded to the surface of each solar cell sheet, and a film strip of light redirecting film is laid on each solder strip. However, the present invention is not limited thereto. In other examples according to the present invention, the number of solder ribbons laid on the surface of each solar cell sheet in the first welding and filming line a1 may be different from the number of solder ribbons laid on the surface of each solar cell sheet in the second welding and filming line, and thus the number of film ribbon conveying units and the laying heads of the filming units provided may also be different.

In the above preferred embodiment according to the present invention, the first welding lay film line a1 and the second welding lay film line a2 share the same film tape supply unit 51. However, the present invention is not limited thereto. In other examples according to the present invention, the above-described film tape supply units 51 may be provided for the first welding lay film line a1 and the second welding lay film line a2, respectively.

Here, exemplary embodiments of the light redirecting sheeting apparatus according to the present invention have been described in detail, but it should be understood that the utility model is not limited to the specific embodiments described and illustrated in detail above. Various modifications and alterations of this invention will become apparent to those skilled in the art without departing from the spirit and scope of this invention. All such variations and modifications are intended to be within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent components.

Claims (15)

1. A sheeting apparatus, comprising:

a film tape supply unit comprising:

a film supply roll on which a roll of light redirecting film is mounted; and

a first cutter disposed on a transport path of the light redirecting film and configured to cut the light redirecting film into a plurality of film strips along a longitudinal direction of the light redirecting film; and

a film laying unit to which the plurality of film tapes are conveyed by a film tape conveying unit.

2. A filming apparatus as set forth in claim 1, wherein said film tape supply unit further comprises:

a position detector disposed to detect a position of the light redirecting film paid out from the film supply roll; and

a position adjuster configured to adjust a position of the light redirecting film based on a detection result of the position detector to cause the light redirecting film to be conveyed to the first cutter along a predetermined path.

3. A filming device as set forth in claim 1, wherein said filming unit includes a first filming unit, said film strip conveying unit includes a first film strip conveying unit, and a first portion of the plurality of film strips is conveyed to said first filming unit by said first film strip conveying unit.

4. A filming apparatus as claimed in claim 3, wherein the first film strip conveying unit includes one or more first conveying lines equal in number to the first portion of film strips, each first conveying line being arranged to convey one film strip to the first filming unit.

5. A filming apparatus as set forth in claim 4, wherein each of said plurality of first conveying lines includes:

an introducing roller configured to introduce one of the plurality of film strips into the first conveying line;

a first reversing roller having a rotational axis parallel to a rotational axis of the introducing roller and arranged to change a conveying direction of the one film strip;

a second reversing roller that conveys the one film strip to the first reversing roller, a rotation axis of the second reversing roller being perpendicular to a rotation axis of the first reversing roller to change a conveying direction of the one film strip; and

an output roller having a rotational axis parallel to a rotational axis of the second reversing roller, the second reversing roller transporting the one film strip to the output roller, the output roller transporting the one film strip to the first film laying unit.

6. A filming device as set forth in claim 5, wherein said second reversing roller is disposed so as to be movable relative to said first reversing roller and said output roller to adjust the tension of said one film strip.

7. A filming device as set forth in claim 4, wherein said filming unit further includes a second filming unit, and said film strip conveying unit further includes a second film strip conveying unit through which a second portion of the plurality of film strips is conveyed to said second filming unit.

8. A filming apparatus as claimed in claim 7, wherein the second film strip conveying unit includes a plurality of second conveying lines equal in number to the second portions of film strips, each of the second conveying lines being arranged to convey one film strip to the second filming unit.

9. A filming apparatus as claimed in claim 8, wherein the arrangement of the second conveying line is the same as that of the first conveying line.

10. A filming apparatus as claimed in claim 8, wherein the number of said second conveying lines is different from the number of said first conveying lines.

11. A filming device as claimed in any one of claims 1 to 10, wherein the film tape includes a glue layer, a film layer having one side surface thereof adhered to the backing layer and the other side surface thereof adhered to the glue layer, and a backing layer, wherein the filming unit includes:

a plurality of laying heads to which the plurality of film strips are respectively delivered;

a second cutter configured to cut the film tape in a width direction of the film tape such that both a glue layer and a film layer of the film tape are cut off, while the backing layer is not cut off; and

a backing layer take-up roll disposed to wind the backing layer of the film tape.

12. A filming device as claimed in claim 11, wherein said second cutter is a laser cutter.

13. A solar cell soldering and sheeting system comprising:

a solar cell sheet supply device; and

a soldering device to which a solar cell sheet is supplied by the solar cell sheet supply device, the soldering device being configured to lay and solder a plurality of solder ribbons on a surface of the solar cell sheet,

characterized in that the solar cell welding and film laying system further comprises a film laying device according to any one of claims 1 to 12, the solar cell sheets welded with the solder strips are conveyed to the film laying device, and a film laying unit of the film laying device lays the film strips to the respective solder strips.

14. The solar cell welding and sheeting system of claim 13, wherein the second cutter of the sheeting unit is configured to cut the strip of film between adjacent solar cells.

15. Solar cell welding and filming system according to claim 13 or 14, comprising a first welding filming line and a second welding filming line, said film strip supply unit of said filming device supplying film strips to said first welding filming line and said second welding filming line.

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