WO2017111186A1

WO2017111186A1 - Ribbon bonding apparatus for solar cell

Info

Publication number: WO2017111186A1
Application number: PCT/KR2015/014165
Authority: WO
Inventors: 김성현; 홍승민
Original assignee: 주식회사 아론
Priority date: 2015-12-22
Filing date: 2015-12-23
Publication date: 2017-06-29
Also published as: KR101709966B1

Abstract

The present invention relates to a ribbon bonding apparatus for a solar cell, comprising: a conductive film supply unit (10) in which a band-shaped conductive film roll having a release paper sheet attached thereto is mounted and which supplies the release paper and the conductive film roll separately; a selective cutting unit (20), positioned in the conductive film supply unit (10), for cutting the conductive film before being separated from the releasing paper and selectively cutting only the conductive film so that the release paper can be continuously discharged after being separated; an adhesion unit (30) for receiving a solar cell and adhering the conductive film supplied from the conductive film supply unit (10) to a bus line of the solar cell; a pre-bonding unit (60) for receiving the solar cell with the conductive film adhered thereto from the adhesion unit (30) and pre-bonding a ribbon supplied from a ribbon supply unit (50) onto the conductive film; a buffer unit (60) for transferring a plurality of solar cells pre-bonded with ribbons in the pre-bonding unit (60) to the rear end so as to be pre-bonded in succession; a transfer unit (70) for simultaneously moving the plurality of solar cells pre-bonded with the ribbons transferred to the buffer unit (60); and a bonding unit (80) for firmly bonding the ribbons to the solar cells by thermocompression-bonding the ribbons in the solar cells pre-bonded with the ribbons sequentially transferred through the transfer unit (70).

Description

Cell Ribbon Bonding Device

The present invention relates to a ribbon bonding device of a solar cell, and more particularly, to a ribbon bonding device of a solar cell capable of improving productivity and enabling stable conveyance regardless of an elongation of a ribbon whose width decreases gradually.

In general, solar cells for photovoltaic power generation can start with silicon or various compounds and produce electricity when they are in the form of solar cells. However, one cell does not get enough output, so each cell must be connected in series or in parallel. This connection is called a solar module.

The photovoltaic module consists of a back sheet, a cell, a ribbon, EVA, and glass. The back sheet is a material that is laid at the bottom of the module, and a TPT (Tedlar / PET / Tedlar) type is widely used, and a ribbon is used as a passage through which electric current flows, so a copper or silver lead coated material is used.

Eva takes advantage of the low iron content so that the elements of the solar cell can be chemically combined, and the glass can prevent light reflection.

As an apparatus for bonding a ribbon in the above structure, there is an example of the applicant Patent No. 10-1153271 of the present invention. As described above, the ribbon is a material coated with silver or tin lead on copper, and bonding is performed in a relatively high temperature atmosphere in order to melt and bond the coated silver or tin lead.

Recently, in order to prevent thermal stress on the solar module due to such a high temperature bonding atmosphere and to reduce efficiency, a technique of replacing a ribbon with a conductive film has been proposed.

It is known that the conductive film is a film having adhesiveness on one side and thus can be bonded at a relatively low temperature compared to a conventional ribbon after adhesion, thereby minimizing the occurrence of thermal stress and minimizing the decrease in efficiency of the solar module.

In particular, Japanese Patent Laid-Open No. 2008-300403 discloses a method for producing such a conductive film and that the conductive film can be applied to a solar cell. It is known that the conductive film may be used as a ribbon of the solar cell, but the apparatus for bonding the conductive film to the solar cell is not described.

Generally, in order to attach a conductive film, the conductive film and the release paper can be separated and the release paper can be continuously discharged without cutting, and the conductive film must be cut and used to a suitable size. The structure of the device is required.

In addition, it was common for a ribbon of a solar cell to have a width of 2.0 mm in 2010, but in 2012, the width decreased to 1.5 mm, and after 2014, a width of 1.0 mm was generalized.

The decrease in the width of the ribbon means an increase in the area directly receiving sunlight from the photovoltaic module, and by increasing the cell area, efficiency, which means power generation per photovoltaic module, can be increased.

In order to directly bond or solder the ribbon to the solar cell, a process of placing the ribbon cut to a predetermined length on the surface of the previously supplied solar cell is required, and includes a clamp. It includes a loader for horizontal reciprocating motion.

Thus, for the structure of placing the ribbon cut through the horizontal reciprocating motion on the surface of the solar cell, the applicant of the present invention Patent No. 10-1113027 (ribbon bonding device of the solar module, registered on January 31, 2012) The ribbon supply apparatus includes a loader for clamping the ribbon of the ribbon supply unit and withdrawing the ribbon in a horizontal direction, and releases the clamping while pressing the drawn ribbon so as to contact the bus of the solar cell, and bonds the ribbon bonding apparatus of the solar module. It is.

However, the invention described in Korean Patent No. 10-1113027 describes that the loader directly transports the end of the ribbon by clamping the ribbon. However, as the width of the ribbon becomes 1.0 mm, the width of the ribbon decreases, so that the ribbon in the transfer process after the clamping is reduced. There was a problem that sagging occurs.

This is because the elongation is increased as the width of the ribbon is narrowed, and the ribbon may be stretched in a state in which it is not maintained, and thus, a ribbon may not be bonded to the designed line width.

The problem to be solved by the present invention in view of the above problems is to provide a ribbon bonding device of a solar cell that can be supplied by cutting the conductive film by a predetermined length while maintaining the discharge of the release paper smoothly.

In addition, another problem to be solved by the present invention is to provide a ribbon bonding device of the solar cell that can improve the productivity by reducing the time of the process.

In addition, another object of the present invention is to provide a ribbon bonding apparatus of a solar cell that can move a ribbon having a width of 1.0 mm or less without deformation using a vacuum picker without clamping the ribbon.

In addition, another object of the present invention is to provide a ribbon bonding device of a solar cell that can transfer the ribbon by using a vacuum picker, bonding is performed at the same time as the ribbon is seated by the vacuum picker, the process time can be shortened. .

In the ribbon bonding apparatus of the present invention for solving the above problems, a strip-shaped conductive film roll (1) with a release paper is attached, the conductive film roll (1) is released to supply the conductive film (2) However, the conductive film supply unit 10 for separating and supplying the release paper 3 and the conductive film 2, and the conductive film before being separated from the release paper 3 in the conductive film supply unit 10 ( 2) cutting the selection paper 20 to selectively cut only the conductive film so that the release paper can be discharged continuously after separation, and the conductive film 2 and the solar cell 5 is supplied with the solar cell (5) A solar cell (5) supplied from the ribbon supply unit (50) by receiving the adhesive portion (30) for adhering the conductive film (2) and the solar cell (5) to which the conductive film (2) is bonded. The pre-bonding to the conductive film (2) bonded to (5) A ribbon unit 40, a buffer unit 60 for moving and accommodating the solar cells 5 in which the ribbon 4 is prebonded in the prebonding unit 40, and a solar cell accommodated in the buffer unit 60. And a transfer part 70 for transferring the 5 parts to the bonding part 80 located in parallel with the buffer part 60 so as to be bonded by the bonding part 80.

In the ribbon bonding device of the present invention, the release paper is not cut in the process of supplying the conductive film with the release paper, so that only the conductive film can be selectively cut, thereby enabling continuous discharge of the release paper, thereby increasing the reliability of the device. It can be effective.

In addition, the ribbon bonding apparatus of the solar cell of the present invention, after bonding the conductive film to the surface of the solar cell pre-bonding the ribbon, and transfers the ribbon pre-bonded solar cell to a bonding position that takes a relatively long process time ribbon By fully bonding, there is an effect that the productivity can be improved.

In addition, the present invention can prevent the breakage of the solar cell in the bonding process and can perform a stable bonding irrespective of the horizontal state, there is an effect that can prevent a decrease in yield.

And the ribbon bonding device of the present invention, the bonding position for bonding the ribbon by using a plurality of vacuum chucks in the bonding position without clamping the ribbon directly to the surface of the solar cell as in the prior art, By separating the standby position where the cut ribbon is placed before bonding and transferring the ribbon from the standby position to the bonding position using a plurality of vacuum pickers, there is an effect that the ribbon can be prevented from being stretched by clamping.

In addition, the ribbon bonding device of the solar cell of the present invention has the effect of improving the productivity by shortening the process time by transferring the ribbon from the standby position to the bonding position and then bonding the ribbon to the solar cell and bonding at the same time. .

1 is a block diagram of a ribbon bonding device of a solar cell according to an embodiment of the present invention.

2 is a schematic configuration diagram of a ribbon bonding apparatus of a solar cell according to a preferred embodiment of the present invention.

3 is a configuration diagram of the selective cutting unit in FIG. 1.

4 is a diagram illustrating a prebonding unit in FIG. 1.

5 is a configuration diagram of the bonding standby unit in FIG. 4.

6 and 7 are diagrams illustrating the vacuum picker unit for explaining the prebonding process of the present invention, respectively.

8 is a configuration diagram of the transfer unit in FIG. 1.

FIG. 9 is a diagram illustrating a bonding part in FIG. 1.

Explanation of Drawing References

1: conductive film roll 2: conductive film

3: Release paper 4: Ribbon

5: Cell 10: conductive film supply part

11: winding roll 12: first feed roller

13: 2nd supply roller 14: Separation part

20: cut part 21: fixed frame

22: Fixed guide 23: Moving guide

24: Lower High Government 25: Cutter

26: Upper High Government 27: Interval Adjustment

28: fixed body 29: through-hole

40: free bonding part 410: bonding waiting part

411: Seating groove 412: Vacuum hole

420: vacuum picker section 421: vacuum picker

422: support 423,424: spring

425: high government 426: spring

427: heating block 430: bonding unit

440: transfer unit 50: ribbon supply unit

60: buffer part 70: transfer part

71: transfer guide 72: drive means

73: moving part 74: moving support part

75: high government 76: vacuum

77: vacuum port portion 78: vertical movement cylinder portion

80: bonding portion 81: cylinder

82: guide part 83: government

84: support shaft 85: bonding head portion

Hereinafter, embodiments of the ribbon bonding apparatus of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a ribbon bonding apparatus of a solar cell of the present invention.

Referring to FIG. 1, in the ribbon bonding apparatus of the present invention, a band-shaped conductive film roll having a release paper is attached thereto, and the conductive film roll is released to supply a conductive film, and the release paper and the conductive film are supplied separately. The conductive film supply unit 10 and the conductive film is located in the conductive film supply unit 10 to cut the conductive film before being separated from the release paper, but selectively cut only the conductive film so that the release paper can be discharged continuously after separation. An adhesive part 30 for attaching the cutout part 20, the conductive film supplied from the conductive film supply part 10 to the bus line of the solar cell, and a solar cell in which the conductive film is adhered at the adhesive part 30. A prebonding unit 60 which pre-bonds a ribbon supplied from a ribbon supply unit 50 to a cell, on the conductive film, and the prebonding A buffer unit 60 transferring the ribbon prebonded to the rear end so as to prebond the plurality of cells in succession, and a plurality of solar cells prebonded with the ribbon transferred to the buffer unit 60 at 60. A transfer unit 70 for simultaneously moving the cells, and a bonding unit 80 for thermally compressing each ribbon in the solar cell in which the ribbons sequentially transferred through the transfer unit 70 are bonded to each other to firmly bond the cells. It is configured by.

Hereinafter, the configuration and operation of the preferred embodiment of the ribbon bonding apparatus of the present invention solar cell configured as described above will be described in more detail.

First, the conductive film supply unit 10 is equipped with conductive film rolls wound around the conductive film, and has a structure of unwinding the conductive film rolls and supplying them to the prebonding unit 40.

2 is a schematic view showing a part of a ribbon bonding apparatus of a solar cell of the present invention.

Referring to FIG. 2, the conductive film supply unit 10 includes a winding roll 11 for supporting the conductive film roll 1 in a rotatable state, and a prebonding unit by releasing the conductive film roll 1 from the winding roll 11. Separation portion for separating the release paper (2) from the conductive film (2) at the rear end of the first supply roller 12 and the third supply roller 13 and the third supply roller 13 to be supplied to the (40) side ( 14) can be configured to include.

The conductive film supply unit 10 may be installed in a number depending on the number of bus lines, the specific configuration may be changed in various ways as necessary, the most simplified structure is shown in FIG.

The selective cutting unit 20 is positioned between the first supply roller 12 and the second supply roller 13. The selective cutting unit 20 cuts the conductive film 2 attached to one surface of the release paper 3 moving between the first supply roller 12 and the second supply roller 13, but the release paper 3 Has a structure to selectively cut only the conductive film 2 so that is not broken, this structure will be described in more detail below.

Even in the state where only the conductive film 2 is selectively cut as described above, the conductive film 2 is not separated from the release paper 3 until the second supply roll 13 passes, but is transferred as it is. Separation is made while passing through the portion 14 and the conductive film is supplied to the prebonding portion 40 in units of a predetermined length, and the release paper 3 is continuously discharged to the outside through the discharge portion (not shown).

The discharge part may use a roller, and the present invention is not limited by the structure as long as it is a structure capable of smoothly discharging a strip-shaped release paper such as vacuum pressure.

3 is a detailed configuration diagram of the selective cutting unit 20.

Referring to FIG. 3, the selective cutting unit 20 includes a through hole 29 penetrating up and down so that the release paper (reference numeral 3 of FIG. 2) and the conductive film 2 are attached to each other. 29 is positioned on the side of the fixing frame 21 and the through-hole 29 of the fixing frame 21 to contact the release paper 3 so that the cutting of the conductive film 2 occurs smoothly. A fixing guide 22 which is supported, a fixing guide 22 provided at a position symmetrical with the fixing body 28 with the through hole 29 therebetween to provide a guide groove, and on the fixing guide 22. The movement guide 23 which can linearly reciprocate toward the fixed body 28, the lower fixing portion 24 coupled to the upper portion of the moving guide 23, and the adjustment of the position on the lower fixing portion 24 Cutter 25 coupled to this possible state, and the image to securely fix the cutter 25 to the lower fixing portion 24 It is configured to include a fixing portion (26) is coupled to the side of the lower side of the lower fixing portion 24 of the cutter 25, the interval adjusting unit 27 for adjusting the degree of protrusion of the cutter (25).

In this configuration, the fixing body 28 is fixed on one side of the fixing frame 21 of the through hole 29 in a state where the position thereof cannot be changed, and the cutter 25 has a side surface of the fixing body 28. Only the conductive film 2 is selectively cut in the structure of attaching the conductive film 2 and the release paper 3 passing through the through hole 29 when moving in the direction of contact with the surface.

That is, when the end of the cutter 25 is in direct contact with the fixed body 28, both the conductive film 2 and the release paper 3 are cut therebetween, but the gap adjusting portion located below the cutter 25 (27) is in direct contact with the fixture 28, the cutter 25 is spaced apart from the side of the fixture 28 by the thickness of the release paper (3) does not cut the release paper (3).

Therefore, the conductive film 2 passing through the separating part 4 of FIG. 2 is divided into a predetermined length, but the release paper 3 can be continuously discharged through the discharge part without being divided.

The conductive film 2 of a predetermined length, which is cut by the selective cutting unit 20 and separated from the release paper by the separating unit 14, is supplied to the adhesive unit 30, and is moved by the moving means such as a robot. Bonded on the bus line.

The construction of the adhesive part 30 can be simply configured by simply placing the conductive film 2 at the position of the bus line of the solar cell and applying a weak pressure downwardly.

The adhesion is to be adhered by the adhesive force of the conductive film (2).

Then, the solar cell to which the conductive film 2 is attached is supplied to the prebonding unit 40. The pre-bonding portion 40 is placed on the conductive film 2 bonded to the solar cell on the ribbon supplied from the ribbon supply unit 50 to apply a pressure so that the temporary adhesion only by the adhesive force of the conductive film (2) Although bonding may be performed directly without performing prebonding, in this case, since the bonding time takes more than other process time, the supply of the conductive film 2 of the conductive film supply part 10, The ribbon supply operation of the ribbon supply unit 50 should be stopped for a relatively long bonding time, and thus the overall process time may be delayed, resulting in low productivity.

In order to solve such a problem, the present invention sequentially transfers the ribbon-bonded solar cells to the rear end so that prebonding to temporarily bond the ribbon to the conductive film of the solar cell is performed. Configure a buffer unit 60 that can be connected to continue without interruption.

The buffer unit 60 pre-bonds a ribbon to a solar cell supplied by the prebonding unit 40 by installing a rail, and then repeatedly transfers the ribbon to a state in which the ribbon is not disconnected. It will accept the bonded solar cell.

The solar cells accommodated in the buffer unit 60 and connected to each other by ribbons are simultaneously transferred to the bonding unit 80 by the transfer unit 70.

The minimum time for bonding the ribbon to the conductive film of the solar cell in the bonding unit 80 is determined, and 10 solar cells are continuously prebonded while bonding is performed in the bonding unit 80 to prevent congestion of the process. It is accommodated in the buffer part 60, and can improve productivity more.

4 is a detailed configuration diagram of the prebonding unit 40.

Referring to FIG. 4, the prebonding part 40 applied to the present invention includes a bonding waiting part 410 in which the cut ribbon 4 is located, and a ribbon 4 located in the bonding waiting part 410. The vacuum picker unit 420 is sucked and transported by vacuum, and the vacuum picker unit 420 for heating and bonding the ribbon 4 to the solar cell 5 and the solar cell 5 are loaded thereon. It comprises a bonding portion 430 which provides a space in which the ribbon 4 can be bonded by 420.

The present invention may include a cutting portion for releasing and feeding the ribbon from the ribbon supply portion 50 supporting the roll in which the ribbon 4 is wound in a rotatable state and cutting the ribbon into a required length. Since various known methods may be used, detailed description thereof will be omitted.

The ribbon 1 may be a standardized width of 1.0 mm or less than 1.0 mm wide.

The ribbon 1 may be positioned above the bonding standby part 410 in a state in which the ribbon 1 is cut to a required length.

5 is a configuration diagram of the bonding waiting portion 10, as shown in the bonding waiting portion 410 is provided with a seating groove 411, the seating groove 411 is cut on the upper cut, the seating groove A plurality of vacuum suction holes 412 are included in the 411.

The bonding standby portion 410 may be provided in plurality as needed, one or more vacuum picker 420 by vacuum suction the ribbon (4) located in each of the bonding standby portion 410 in sequence By moving to the bonding unit 430, it is possible to reduce the waiting time and improve productivity.

The seating groove 411 and the vacuum suction hole 412 is in a stable state by preventing the ribbon 4 from being bent or displaced in the state where the ribbon 4 is in a fixed position. It is possible to transfer by.

As shown in FIG. 6, the vacuum picker unit 420 may include a plurality of vacuum pickers 421 that adsorb or desorb the ribbon 4 according to a vacuum pressure transmitted through the tube 424. The vacuum picker 421 is buffered and supported by the inner spring 423, the support part 422 moving by the action of the transfer part 440, the fixing part 425 provided in the support part 422, and the high Located at the lower part of the support part 422 by a spring 426 provided in the government 425, the upper and lower buffering function is possible in the state that the ends of the vacuum picker 421 is inserted, the vacuum picker 421 The ribbon 4 is configured to include a heating block 227 for pre-bonding while the ribbon 4 is seated on the solar cell 5 to which the conductive film 2 is attached.

If the configuration of the vacuum picker 420 will be described in more detail, first, the support part 422 is connected to the transfer part 440 to move up and down and to the left and right, in particular, the inside of the hollow, a plurality of vacuum picker 421 By the spring 423 provided therein in a state in which they are inserted, the buffering function is enabled up and down.

The upper end of the vacuum picker 421 may be connected to the tube 424 is supplied with a vacuum pressure or the vacuum pressure is released to desorb the ribbon 4 or the vacuum adsorbed ribbon 4 at the lower end. .

In addition, the vacuum picker unit 420 includes a heating block 427 for bonding the ribbon (4). The heating block 427 may have a configuration in which a heater is inserted therein and is spaced apart from the lower side of the support part 422 by a fixing part 425, and the support part is located inwardly. The lower surface of the 422 and the upper surface of the heating block 427 is a configuration capable of buffering action by the spring 426, the both ends of the contact.

The buffering action of the heating block 427 is to prevent the solar cell 5 from being broken when the ribbon 4 is pressed on the upper surface of the solar cell 5 as shown in FIG. The spring 426 is compressed by the contact at the time of bonding, and the fixing part 425 is pushed upward and pushed upward of the support part 422.

The bonding unit 430 is not limited to the present invention by the configuration as long as the solar cell 5 is transported to be positioned at a predetermined position.

When the ribbon 4 is pre-bonded to the solar cell 5 to which the conductive film 2 is attached according to the present invention in more detail, first, the bonding standby part 410 in the state in which the ribbon 4 is cut. Is transferred to, and is located in the seating groove 411 of the bonding standby portion 410, at this time, the vacuum pressure is supplied to the vacuum hole 412 can be fixed to the ribbon (4) in close contact.

In such a state, the vacuum picker part 420 moves to the upper portion of the bonding standby part 410, and then moves downward, so that the lower end of the vacuum picker 421 is positioned in the seating groove 411. It is in contact with the top of 4).

In this case, each of the vacuum pickers 421 may be buffered in a state of being fixed to the support part 422 by a spring 423, and the ribbon 4 may be supplied with a vacuum pressure through the tube 424 in a contact state. Vacuum).

At the same time, the vacuum pressure supplied through the vacuum hole 412 of the bonding standby part 410 is no longer supplied, and the ribbon 4 is movable in a vacuum sucked state by the vacuum pickers 421. do.

As described above, the vacuum hole 412 and the mounting groove 411 may be used to prevent displacement or damage of the ribbon 4 which may occur when the vacuum picker 420 vacuum-adsorbs the ribbon 4. do.

Then, the vacuum picker unit 420 moves upward, then moves horizontally again to move to the top of the bonding unit 430. In this case, the bonded cell 430 in the previous state is unloaded, and the new solar cell 5 to which the conductive film 2 is adhered is loaded.

The unloaded solar cell 5 is horizontally transferred to the buffer unit 60 as described above.

The vacuum picker unit 420 moves to an upper portion of the solar cell 5 to bond the ribbon 4, and then moves downward to move the ribbon 4 that is vacuum-adsorbed by the vacuum pickers 421. It is seated on the upper part of (5).

As the vacuum picker 420 moves downward, the vacuum pickers 421 are moved upward by the action of the spring 423, and the heating block 427 contacts the upper portion of the ribbon 4 at a predetermined pressure. do.

At this time, the heating block 427 also acts as a buffer by the action of the fixing part 425 and the spring 426, it is possible to prevent damage to the solar cell (5).

By maintaining the above contact state for a predetermined time, the ribbon 4 is pre-bonded on the conductive film adhered to the bus of the solar cell 5, and the vacuum pressure supplied through the tube 424 together with the bonding is cut off. The ribbon 4 is desorbed.

A new ribbon 4 is supplied to the bonding standby portion 410 together with the bonding process, and the vacuum picker portion 420 moves to the upper portion of the bonding standby portion 410 again, and the bonding of the ribbon 4 is performed. The completed solar cell 5 is unloaded from the bonding unit 430 and transferred to the buffer unit 60.

As described above, the present invention can perform prebonding at the same time as the ribbon 4 is seated in the prebonding process, thereby shortening the process time and increasing productivity.

As described above, the solar cells 5 in which the ribbon 4 is prebonded in the prebonding unit 40 are transferred to the bonding unit 80 by the transfer unit 70.

8 is a detailed configuration diagram of the transfer unit 70.

Referring to FIG. 8, a transfer guide 71 having a driving means 72 coupled to one side, and a moving unit 73 linearly reciprocating in one direction along the transfer guide 71 by the driving means 72; , A bar-shaped moving support part 74 fixedly coupled to the lower part of the moving part, a fixed frame 75 fixedly coupled to a position spaced apart from each other at regular intervals to the side of the moving support part 74, and the fixed frame 75 And a vacuum chuck 76 which is fixed to the vacuum chuck 76 to suck the solar cell 5 to which the ribbon 4 is prebonded and moves from the prebonding portion 40 to the bonding portion 80. Vacuum port portion 77 for providing a vacuum pressure to each of the) and the vertical movement cylinder portion 78 which is installed between the moving portion 73 and the moving support portion 74 to move the moving support portion 74 up and down It may be configured to include.

In the configuration of the transfer part 70, the solar cell 5 in which the ribbon 4 is prebonded in the prebonding part 40 is transferred to the buffer part 60 and accommodated, and the solar cell accommodated in the buffer part 60. (5) is configured to be able to transfer to the bonding portion 80 arranged side by side on the side of the transfer portion (50).

The solar cells 5, which are accommodated in the buffer part 60 and the ribbons 4 are prebonded, are attracted by the vacuum chucks 76 of the transfer part 70, and are moved by the vertical movement cylinder part 78. The support 74 is moved upward to move the fixed frame 75 fixed to the movable support 74, the vacuum chucks 76, and the solar cell fixed to the vacuum chuck 76.

In this state, the moving part 73 is moved toward the bonding part 80 along the transfer guide 71 by the driving means 72, and then the moving support part 74 is moved downward to the up and down moving cylinder part 78 again. The solar cell is seated on the bonding unit 80.

Then, the vacuum pressure of the vacuum chuck 76 is released and then returned to its original position.

In the drawing, a tube connecting the vacuum chucks 76 and the vacuum port 77 is omitted.

As mentioned above, the present invention bonds the conductive film 2 to the plurality of solar cells 5 within the minimum required time for bonding in the bonding unit 80, and prebonds the ribbon 4 to the buffer unit 60. ), Thereby improving productivity by eliminating the need for waiting time for bonding.

9 is a detailed configuration diagram of the bonding unit 80.

Referring to FIG. 9, the bonding part 80 applied to the preferred embodiment of the present invention includes a guide part 82 supporting the vertical movement, and bonding the ribbon and the solar cell in the prebonded state with heat and pressure. A fixing part 83 supporting the bonding head part 85 and the bonding head part 85, and fixing the upper center of the bonding head part 85 to the support shaft 84 so as to flow from side to side. And a cylinder 81 configured to guide the fixing part 83 to the guide part 82 so as to be vertically conveyed.

A heater is provided in the bonding head portion 85.

In the structure as described above, the bottom surface of the bonding head portion 85 is a surface in contact with the solar cell and the conductive film, and has a flat shape and the solar cell is inclined accurately while the solar cell is transferred by the transfer part 80. When the surface is not parallel to the ground, the solar cell may be damaged or damaged when the bonding head 85 contacts the solar cell.

When the conductive film 2 is used, as described above, relatively low temperature bonding is possible to prevent damage to the solar cell 5, but may be damaged depending on the physical position of the solar cell 5. have.

In order to prevent this, the upper center of the bonding head portion 85 is fixed to the fixing portion 83 by the support shaft 84, and the tilt of the solar cell is possible by tilting from side to side based on the support shaft 84. Even when there is an abnormality in phosphorus arrangement, there is a feature that can prevent damage to the solar cell.

The fixing portion 83 is moved up and down by the cylinder 81, the bonding head portion 85 is bonded to the solar cell by moving the fixing portion 83 downward when bonding the ribbon to the solar cell After the bottom surface of the head portion 85 is held in contact with the bottom surface for a predetermined time, when the bonding is completed, the fixing portion 83 is moved upward, and the ribbon-bonded solar cell is unloaded to the outside by a robot or the like. do.

As such, the present invention can bond the electrode to the solar cell using relatively low temperature heat, thereby preventing damage to the cell, and stably bond the ribbon to the solar cell loaded in a physical non-horizontal state. Will be.

As described above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above-described embodiments, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible to carry out by this and this also belongs to the present invention.

When the ribbon is bonded to a solar cell, the present invention is configured to prebond the ribbon using a conductive film within a minimum time required for bonding, and to accommodate the prebonded solar cells in a buffer, thereby increasing productivity. There is possibility.

Claims

A strip-shaped conductive film roll 1 having a release paper attached thereto is mounted, and the conductive film roll 1 is released to supply the conductive film 2, and the release paper 3 and the conductive film 2 are supplied separately. A conductive film supply unit 10;

Selective cutting unit 20 located in the conductive film supply unit 10 to cut the conductive film 2 before being separated from the release paper 3, but selectively cut only the conductive film so that the release paper can be continuously discharged after separation. );

An adhesive part 30 receiving the conductive film 2 and the solar cell 5 to adhere the conductive film 2 to the solar cell 5;

The pre-bonding of the ribbon 4 supplied from the ribbon supply unit 50 to the conductive film 2 bonded to the solar cell 5 by receiving the solar cell 5 to which the conductive film 2 is bonded Bonding unit 40;

A buffer unit 60 which moves and accommodates the solar cells 5 in which the ribbon 4 is prebonded in the prebonding unit 40; And

The transfer unit 70 transfers the solar cells 5 accommodated in the buffer unit 60 to the bonding unit 80 located in parallel with the buffer unit 60, and is bonded by the bonding unit 80. Ribbon bonding device of the solar cell.
The method of claim 1,

The prebonding unit 40,

A bonding standby portion 410 in which the ribbon 4 is positioned,

A vacuum picker part 420 which suctions and transports the ribbon 4 positioned in the bonding standby part 410 by vacuum, and heat-bonds the ribbon 4 after it is seated on the solar cell 5;

Ribbon bonding apparatus of a solar cell including a bonding part 430 which provides a space in which the ribbon 4 can be bonded by the vacuum picker part 420 in the state in which the solar cell 5 is loaded on the top. .
The method of claim 2,

The bonding standby portion 410,

Ribbon bonding of a solar cell including a seating groove 411 on which the ribbon 4 is seated on a top surface, and a plurality of vacuum holes 412 for vacuum sucking the ribbon 4 seated in the seating groove 411. Device.
The method of claim 2,

The vacuum picker unit 420,

A plurality of vacuum pickers 421 which adsorb or desorb the ribbon 4 according to the vacuum pressure transmitted through the tube 424,

A support part 422 which buffers and supports the plurality of vacuum pickers 421 using a spring 423 therein and moves by a transfer part 440;

A fixing part 425 provided on the support part 422,

Located at the lower part of the support part 422 by a spring 426 provided in the fixing part 425, the up and down buffer function is possible in the state that the ends of the vacuum picker 421 is inserted, the vacuum picker 421 Ribbon bonding device of a solar cell comprising a heating block (427) for bonding in the state that the ribbon (4) is seated on the solar cell (5).
The method of claim 1,

The selective cutting unit 20,

A fixing frame having a through hole penetrated vertically and positioned to pass through the through hole in a state in which the release paper 3 and the conductive film 2 are attached to each other;

A fixing body positioned on a side surface of the through-hole of the fixing frame to be in contact with the release paper so as to smoothly cut the conductive film;

A fixing guide provided at a position symmetrical with the fixing body with the through hole therebetween to provide a guide groove;

A movement guide capable of linear reciprocating motion on the stationary body on the stationary guide;

A lower fixing part coupled to an upper part of the moving guide;

A cutter coupled to the lower fixing part in a state where adjustment of the position is possible;

An upper fixing part for firmly fixing the cutter to the lower fixing part; And

The ribbon bonding device of the solar cell including a gap adjusting portion coupled to the side of the lower lower fixing portion of the cutter to limit the degree of protrusion of the cutter, so that only the conductive film can be selectively cut by the cutter.
The method of claim 1,

The transfer unit,

A transfer guide coupled to one side of the driving means;

A moving part linearly reciprocating in one direction along the conveyance guide by the driving means;

A bar-shaped moving support part fixed to the lower part of the moving part;

A fixed frame fixed to a side spaced apart from each other at regular intervals to the side of the movable support;

A vacuum chuck fixed to the fixed frame to suck the solar cell to which the ribbon is prebonded and to move from the prebonding side to a selected one of the plurality of bonding units;

A vacuum port unit providing a vacuum pressure to each of the vacuum chucks; And

The ribbon bonding device of the solar cell is installed between the moving portion and the moving support portion including a vertical moving cylinder for moving the moving support up and down.
The method of claim 1,

The bonding unit,

A guide part supporting the vertical movement;

A bonding head unit bonding the ribbon and the cell in the prebonded state with heat and pressure;

A fixing part for supporting the bonding head part and fixing the upper center of the bonding head part to a support shaft to fix the bonding head part to flow from side to side; And

Ribbon bonding device of a solar cell comprising a cylinder for guiding the fixing portion guided to the guide portion.