KR102487772B1 - Apparatus for attaching interconnector of solar cell panel - Google Patents

Abstract

An apparatus for attaching a wiring member of a solar cell panel according to an embodiment of the present invention includes a spray member having a spraying unit for spraying flux to a wiring member including a core layer and a solder layer formed on a surface of the core layer, and applying the flux to the spray member. Flux unit including a supply member to provide; and an attaching portion for attaching the wiring member to the solar cell by soldering the solder layer by pressing the wiring member to the solar cell while applying heat. The supply member includes a recycling member that collects and recirculates the flux sprayed from the spray member and supplies the flux to the spray member.

Description

Wiring material attachment device of solar cell panel {APPARATUS FOR ATTACHING INTERCONNECTOR OF SOLAR CELL PANEL}

The present invention relates to an apparatus for attaching a wiring material to a solar cell panel, and more particularly, to an apparatus for attaching a wiring material to a solar cell panel having an improved structure.

Recently, as depletion of existing energy resources such as oil and coal is expected, interest in alternative energy to replace them is increasing. Among them, a solar cell is in the limelight as a next-generation cell that converts sunlight energy into electrical energy.

A plurality of these solar cells are connected in series or parallel by a ribbon, and are manufactured in the form of a solar cell panel through a packaging process for protecting the plurality of solar cells. Since the solar cell panel must generate power for a long period of time in various environments, long-term reliability is greatly required. At this time, conventionally, a plurality of solar cells are connected by a ribbon.

However, a device and method for attaching such a ribbon may be complicated and productivity may decrease. In addition, when a wiring material having a different structure is used instead of a ribbon, a device and method for attaching it are not presented.

An object of the present invention is to provide an apparatus for attaching a wiring material to a solar cell panel capable of improving productivity by attaching the wiring material to a solar cell by an automated system.

In addition, the present invention is to provide an apparatus for attaching a wiring material to a solar cell panel capable of reducing process costs.

An apparatus for attaching a wiring member of a solar cell panel according to an embodiment of the present invention includes a spray member having a spraying unit for spraying flux to a wiring member including a core layer and a solder layer formed on a surface of the core layer, and applying the flux to the spray member. Flux unit including a supply member to provide; and an attaching portion for attaching the wiring member to the solar cell by soldering the solder layer by pressing the wiring member to the solar cell while applying heat. The supply member includes a recycling member that collects and recirculates the flux sprayed from the spray member and supplies the flux to the spray member.

According to the wiring material attachment apparatus according to the present embodiment, a wiring material including a solder layer for soldering including a rounded portion may be attached to a solar cell by an automated system. In addition, since the flux can be recycled and reused by providing a recycling member, manufacturing costs can be greatly reduced. In particular, a spray process may be used to uniformly form a flux layer in a wiring member including a rounded portion, but at this time, the amount of flux that is sprayed but fails to form a flux layer is very large. The recirculating member according to the present embodiment is applied to a wiring material attachment device to which a spray process is applied, and can greatly reduce waste of flux that may occur in this case.

1 is a cross-sectional view of a solar cell panel to which an apparatus for attaching a wiring member of a solar cell panel according to an embodiment of the present invention may be applied.
FIG. 2 is a perspective view illustrating solar cells and wiring members of the solar cell panel shown in FIG. 1 .
3 is a configuration diagram schematically illustrating a part of an apparatus for attaching a wiring material to a solar cell panel according to an embodiment of the present invention.
4 is a configuration diagram schematically showing another part of a solar cell panel wiring member attachment device according to an embodiment of the present invention.
5 is a block diagram schematically illustrating an apparatus for attaching a wiring material to a solar cell panel according to an embodiment of the present invention.
FIG. 6 is a perspective view schematically illustrating a state in which a solar cell and a wiring member positioned thereon are fixed by using an upper fixing member included in the wiring member attachment device shown in FIG. 4 .
FIG. 7 is a configuration diagram showing a flux unit of the apparatus for attaching a wiring material to a solar cell panel shown in FIG. 3 .
FIG. 8 is a configuration diagram showing a spray member of the flux unit shown in FIG. 7 and a wiring member in which a spray process is performed.
FIG. 9 is a plan view illustrating various examples of a spraying unit that can be applied to the flux unit shown in FIG. 7 .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to these embodiments and can be modified in various forms.

In the drawings, in order to clearly and briefly describe the present invention, the illustration of parts not related to the description is omitted, and the same reference numerals are used for the same or extremely similar parts throughout the specification. In addition, in the drawings, the thickness, width, etc. are enlarged or reduced in order to make the description more clear, and the thickness, width, etc. of the present invention are not limited to those shown in the drawings.

And when a certain part "includes" another part throughout the specification, it does not exclude other parts unless otherwise stated, and may further include other parts. In addition, when a part such as a layer, film, region, plate, etc. is said to be “on” another part, this includes not only the case where it is “directly on” the other part, but also the case where another part is located in the middle. When a part such as a layer, film, region, plate, etc. is said to be "directly on" another part, it means that there are no intervening parts.

Hereinafter, an apparatus for attaching a wiring material to a solar cell panel according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a cross-sectional view of a solar cell panel to which an apparatus for attaching a wiring member of a solar cell panel according to an embodiment of the present invention can be applied, and FIG. 2 is a perspective view showing solar cells and wiring members of the solar cell panel shown in FIG. 1 .

Referring to FIG. 1 , the solar cell panel 100 according to the present embodiment includes a plurality of solar cells 150 and a wiring member 142 electrically connecting the plurality of solar cells 150 to each other. In addition, the solar cell panel 100 includes a sealing material 130 that encloses and seals the plurality of solar cells 150 and the wiring material 142 connecting them, and a front surface positioned on the front surface of the solar cells 150 on the sealing material 130. It includes a substrate 110 and a rear substrate 120 positioned on the rear surface of the solar cell 150 on the sealing material 130 . This will be explained in more detail.

In this embodiment, the solar cell 150 includes a semiconductor substrate, an emitter region formed on one surface of the semiconductor substrate or on the semiconductor substrate, a rear electric field region formed on the other surface, a first electrode connected to the emitter region, and a rear surface. A second electrode connected to the electric field region may be included. For example, the solar cell 150 may be a silicon semiconductor solar cell based on a semiconductor substrate including monocrystalline or polycrystalline silicon. As a result, high efficiency can be obtained. However, the present invention is not limited thereto, and the solar cell 150 may have various structures.

Also, the plurality of solar cells 150 may be electrically connected in series, parallel, or series-parallel by the wiring member 142 . Specifically, the wiring member 142 has a width smaller than that of the solar cell 150 and is adjacent to the second solar cell from above the first electrode of the first solar cell 151 among the two adjacent solar cells 150 . It is connected long to the top of the second electrode of 152 to electrically connect them. When three or more solar cells 150 are provided, the wiring member 142 is positioned on two adjacent solar cells as described above so that the solar cells 150 are electrically connected continuously.

In this embodiment, the wiring member 142 may be composed of a wire having a smaller width than a ribbon having a relatively wide width (eg, 1 mm to 2 mm) that has been used in the past. Here, the wiring member 142 may include a core layer 142a made of metal, and a solder layer 142b coated with a thin thickness on the surface of the core layer 142a and containing a solder material to enable soldering with the electrode. can And, for example, the width or diameter of the wiring member 142 may be 250um to 500um. Here, since the shape of the wiring member 142 may change after soldering and the thickness of the solder layer 142b is formed thin, the width or diameter of the wiring member 142 may mean the width or diameter of the core layer 142a. . At this time, the wire constituting the wiring member 142 may include a rounded portion. That is, the wire constituting the wiring member 142 may have a circular, elliptical, or curved cross section or a rounded cross section.

In addition, 6 to 33 wiring members 142 may be provided based on one surface of the solar cell 150 . At this time, in order to further improve the output of the solar cell panel 100, the number of wiring members 142 may be 10 or more (eg, 12 to 13). However, the present invention is not limited thereto. At this time, the pitch of the wiring member 142 may be 4.75 mm to 26.13 mm. However, the above numerical values are only presented as an example and the present invention is not limited thereto.

The sealant 130 may include a first sealant 131 located on the front side of the solar cell 150 connected by the wiring member 142 and a second sealant 132 located on the rear side of the solar cell 150. can For example, an ethylene-vinyl acetate copolymer resin (EVA), polyvinyl butyral, a silicon resin, an ester-based resin, or an olefin-based resin may be used as the first sealing material 131 and the second sealing material 132 . The front substrate 110 may be made of a light-transmitting insulating material through which light may pass, and the rear substrate 120 may be made of a sheet made of a light-transmitting material, a non-transmissive material, or a reflective material. For example, the front substrate 110 may be made of a glass substrate or the like, and the rear substrate 120 may have a TPT (Tedlar/PET/Tedlar) type, or a base film (eg, polyethylene terephthalate (PET)). ))) may include a polyvinylidene fluoride (PVDF) resin layer formed on at least one surface. However, the present invention is not limited thereto.

As in the present embodiment, when a wire having a small width or diameter is used as the wiring member 142, material costs can be significantly reduced, and a sufficient number of wiring members 142 are provided to minimize the moving distance of the carrier so that the solar cell panel ( 100) can be improved. In addition, the wiring member 142 induces reflection or diffuse reflection by the rounded portion, so that light can be reused.

In this embodiment, as described above, a large number of wire members 142 having a small width or diameter and a cross-sectional shape such as a circle should be attached to the solar cell 150 . Accordingly, a wiring material attachment device capable of attaching the wiring material 142 to the solar cell 150 to have high adhesion even though it has a wire shape and improving productivity by attaching a large number of wiring materials 142 together is required. . Considering this, the solar cell panel wiring member wiring member attachment device according to the present embodiment will be described in detail with reference to FIGS. 3 to 9 .

3 is a configuration diagram schematically illustrating a part of an apparatus for attaching a wiring material to a solar cell panel according to an embodiment of the present invention. 4 is a configuration diagram schematically showing another part of a solar cell panel wiring member attachment device according to an embodiment of the present invention. 5 is a block diagram schematically illustrating an apparatus for attaching a wiring material to a solar cell panel according to an embodiment of the present invention. 6 is a perspective view schematically illustrating a state in which a solar cell and a wiring member positioned thereon are fixed using an upper fixing member included in the wiring member attachment device shown in FIG. 4 . In FIG. 4 for simplicity, the upper fixing member supply unit 2560 and the solar cell supply unit 251 are not shown.

Referring to FIGS. 3 to 6 , the apparatus for attaching a wiring material to a solar cell panel according to the present embodiment (hereinafter referred to as “apparatus for attaching a wiring material”) 200 unwinds the wiring material 142 wound around a winding roll 212 to process the process. A wiring material supply unit 210 providing a direction, a flux unit 220 applying flux (reference numeral 224 in FIGS. 7 and 8, hereinafter the same) to the provided wiring material 142, and drying to dry the flux 224 It may include a part 230 , a wiring material lead-out part 240 for fixing the wiring material 142 to the jig 243 , and an attachment part 250 for attaching the wiring material 142 to the solar cell 150 .

The wiring material 142 provided from the wiring material supply unit 210 passes through the flux unit 220 and the drying unit 230 and is provided to the wiring material take-out unit 240 in a state in which a flux layer is formed. After fixing only the wiring member 142 to the jig 243 in the wiring member lead-out part 240, the cutting part 244 cuts the wiring member 142. Accordingly, a wiring member-jig assembly 243a in which the solar cell 150 and the separately cut wiring member 142 are fixed to the jig 243 is formed.

In this embodiment, the jig 243 includes a first fixing part 241 fixed to one side of the wiring member 142 and a second fixing part 242 fixed to the other side of the wiring member 142 . The first fixing part 241 and the second fixing part 242 may be provided with clamp parts PA and PB that clamp each of the wiring members 142 by moving to change the distance therebetween. Structures and methods of the clamp portions PA and PB may be variously modified. The cutting unit 244 may have various structures and methods capable of cutting the wiring member 142 after the wiring member 142 is fixed to the jig 243 .

In addition, various members or devices for aligning or guiding the position of the wiring material 142 may be located in the paths moving to the wiring material supply unit 210, the flux unit 220, the drying unit 230, and the wiring material take-out unit 240. . For example, a guide member 214 for guiding the wiring member 142 to be positioned at a desired position, a pressing member 246 for pressing and fixing the wiring member 142 when the wiring member 142 does not move, and the like may be further included. can In the drawings, as an example, the groove 214a through which the wiring member 142 passes is formed in the guide member 214 to guide the wiring member 142, but the present invention is not limited thereto. Therefore, the shape, structure, method, etc. of the guide member 214 and the pressing member 246 may be variously modified.

The wiring material-jig combination 243a formed in this way is transferred to the conveyor belt 252 and provided. For example, a transfer member (not shown) that transfers the jig 243 transfers the jig 243 from the wiring material take-out unit 240 to the conveyor belt 252, thereby transferring it to the wiring material-jig assembly 243a. It can be. As the structure of the transfer member, various known structures and methods may be applied. Solar cells 150 are provided on the conveyor belt 252 from the solar cell supplier 251 .

At this time, the conveyor belt 252 is provided with an exhaust hole 252a. As a result, exhaust is performed using the exhaust device 259 through the exhaust hole 252a, so that the solar cell 150 and the wiring material located between the lower portion thereof (ie, the solar cell 150 and the conveyor belt 252) ( 142) can be effectively compressed. The exhaust device 259 may have a structure capable of discharging gas through the exhaust hole 252a. In this way, the solar cell 150 and the wiring member 142 positioned below the solar cell 150 are fixed on the conveyor belt 252 by adsorption.

At this time, when the wiring member 142 and the solar cell 150 are fixed using exhaust adsorption, one side of the conveyor belt 252 (conveyor belt 252) prevents the wiring member 142 and the solar cell 150 from being displaced. The third fixing part 254 may be located before the starting part). The third fixing part 254 maintains a fixed state to have a constant position with the conveyor belt 252 . The third fixing portion 254 may include clamp portions PA and PB capable of fixing the wiring member 142 , respectively. Structures of the clamp portions PA and PB may be variously modified.

In addition, the solar cell 150 and the wiring member 142 positioned thereon are fixed by an upper fixing member (or fixing member) 256 positioned above them.

The upper fixing member 256 supplied from the upper fixing member supply unit 2560 fixes the wiring member 142 at the top of the solar cell 150 before being put into the heat source unit 258 . Then, the upper fixing member 256 passes through the heat source unit 258 together with the wiring member 142 in a state in which the upper portion of the solar cell 150 is fixed. While passing through the heat source unit 258, the solar cell 150 and the wiring member 142 are attached to each other. After passing through the heat source unit 258 , the upper fixing member 256 may be separated from the solar cell 150 and the wiring member 142 and return to the upper fixing member supply unit 2560 . At this time, the upper fixing member supply unit 2560 is not connected to the conveyor belt 252, the heat source unit 258, etc., but is driven by an independent driving unit to move the upper fixing member 256 to the top of the solar cell 150 and the wiring member 142. can play a role in providing

For example, the upper fixing member supply unit 2560 is located in a state extending from before the heat source unit 258 to after the heat source unit 258, so that the solar cell 150 and the wiring member 142 are located before the heat source unit 258. The upper fixing member 258 can be easily supplied thereon and the upper fixing member 258 passing through the heat source portion 258 can be easily collected from the rear of the heat source portion 258 . However, the present invention is not limited thereto.

Also, the upper fixing member supply unit 2560 includes a plurality of upper fixing members 256, so that even while one upper fixing member 256 passes through the heat source unit 258, another upper fixing member 256 is not provided thereafter. The positioned solar cell 150 and the wiring member 142 may be fixed. Accordingly, a process of attaching the plurality of solar cells 150 may be continuously performed.

In this embodiment, the upper fixing member 256 may include frame parts 2562 and 2566 and a plurality of compression pieces 2564 fixed to the frame parts 2562 and 2566 to compress the plurality of wiring members 142. can

The frame parts 2562 and 2566 may have various shapes to which the plurality of compression pieces 2564 may be fixed. For example, the frame parts 2562 and 2566 connect a first part 2562 including a part disposed in a direction crossing the extension direction of the wiring member 152 and both sides of the first part 2562, respectively. A second portion 2566 may be included. Accordingly, the plurality of compression pieces 2564 can be stably fixed or supported while simplifying the structure. In the drawings, the second part 2566 is formed in a straight line shape and positioned one on each side, but the present invention is not limited thereto. The second part 2566 may have a picture frame shape or a rectangular shape with an empty inside. Also, the first part 2562 and the second part 2566 may be integrally formed with each other, or may be formed separately and fastened to each other by a fastening member such as a screw.

The first portion 2562 and the compression piece 2564 may be integrally formed, or the compression piece 2564 may be fixed or coupled to the lower surface of the first portion 2562 . For example, the compression piece 2564 may be detachably fixed to the first part 2562 so that it can be easily repaired or replaced. As a structure in which the compression piece 2564 is fixed or coupled to the lower surface of the first portion 2562, various known structures may be used.

The first part 2562 may be spaced apart from each other at regular intervals so that the wiring member 142 may be stably pressed to the solar cell 150 . At this time, the first part 2562 or the frame parts 2562 and 2566 may have a weight such that the compression piece 2564 can compress the wiring member 142 to the solar cell 150 . That is, the frame parts 2562 and 2566 may provide compression force to the wiring member 142 by their own weight. According to this, since it is not necessary to provide another device for separately applying the pressing force, the facility can be simplified.

The compression piece 2564 may be located in the first portion 2562 to correspond to a portion where the wiring member 142 is located. For example, the crimping pieces 2564 are spaced apart from each other by the distance of the wiring member 142 fixed to the solar cell 150, and the same number as the number of wiring members 142 may be fixed to each first part 2562 in a row. there is. Accordingly, the plurality of crimping pieces 2564 respectively positioned on the plurality of first portions 2562 may crimp and fix one wiring member 142 .

The compression piece 2564 may have various structures capable of pressing and fixing the wiring member 142 . The compression piece 2564 may have an inclinedly bent portion or a rounded portion while having elasticity. For example, the compression piece 2564 may have an approximate C-shape, U-shape, or V-shape.

In this way, when the solar cell 150 and the wiring member 142 are fixed by the conveyor belt 252 and/or the upper fixing member 256, the jig 243 that fixed the wiring member 142 and the third fixing part 254 ) is separated from the wiring member 142 and the jig 243 is conveyed to the wiring member take-out part 240. In this way, the conveyor belt 252 serves to transport the wiring member 142 and the solar cell 150, and fixes the solar cell 150 aligned in a certain position and the wiring member 142 positioned below it in that state. play a role

The solar cell 150, the wiring member 142, and the upper fixing member 256 pass through the heat source unit 258 together, and the solar cell 150 and the wiring member 142 are attached to form a solar cell string, and the heat source unit ( The upper fixing member 256 passing through 258 is separated from the solar cell 150 and the wiring member 142 and transported to the upper fixing member supply unit 2560 .

At this time, the attachment unit 250 provides light by the heat source unit 258 in a state in which the wiring member 142 and the solar cell 150 are pressurized and fixed, thereby applying heat (eg, radiant heat) to the wiring member ( 142) is attached to the solar cell 150.

More specifically, the heat source unit 258 provides heat by applying light to the solar cells 150 at the top or bottom of the conveyor belt 252 . The solder layer 142b of the wiring member 142 is melted and soldered by the heat provided by the heat source unit 258, whereby the wiring member 142 is attached to the electrodes 42 and 44 of the solar cell 150. In this embodiment, since the heat source unit 258 applies heat by light, the time of the attachment process can be reduced and the attachment characteristics can be improved. For example, the heat source unit 258 may be an infrared lamp. However, the present invention is not limited thereto, and various structures and methods capable of providing heat may be applied to the heat source unit 258 .

Hereinafter, the flux unit 220 and the drying unit 230 will be described in more detail with reference to FIGS. 7 to 9 together with FIG. 3 .

FIG. 7 is a configuration diagram showing the flux unit 220 of the wiring material attaching device 200 of the solar cell panel shown in FIG. 3 . FIG. 8 is a configuration diagram showing the spray member 220 of the flux unit 220 shown in FIG. 7 and the wiring member 142 in which the spray process is performed. FIG. 9 is a plan view illustrating various examples of a spraying unit 222a that can be applied to the flux unit 220 shown in FIG. 7 . For simplicity and clarity, only the injection part 222a is shown in FIG. 9 .

Referring to FIGS. 3 and 7 to 9 , a plurality of wiring members 142 unwound from the take-up roll 212 of the wiring member supply unit 210 and aligned in a predetermined shape pass through the flux unit 220 . In the flux unit 220, the flux 224 is applied to the outer surface of the wiring member 142 to form a flux layer 224a. The flux 224 prevents the wiring member 142 or the metal material of the electrodes 42 and 44 from being oxidized when the wiring member 142 is attached to the solar cell 150, or removes the oxide film formed on the outer surface of the wiring member 142. Thus, it can play a role in improving the adhesion properties. The flux 224 includes a solvent and a resin, and may include, for example, an activator including a halogen element (fluorine, chlorine, bromine, iodine, etc.) (particularly, fluorine). An oxide film formed on the outer surface of the wiring member 142 can be easily removed by an activator containing a halogen element.

As shown in FIG. 7, in this embodiment, the flux unit 220 includes a spray member 222 for spraying the flux 224 to a plurality of wiring members 142 arranged side by side, and a flux to the spray member 222. and a supply member 226 providing 224. At this time, the supply member 226 includes a recycling member 226a that collects the sprayed flux 224 from the spray member 222 and provides it to the spray member 222 to recycle the flux 224, and the recycling member 226a may include a raw material supply member 226b providing unused flux 224.

Accordingly, in this embodiment, the flux 224 may be applied to the outer surface of the wiring member 142 by a spray method or a spray process. When the flux 224 is applied to the wiring member 142 in a spray method, the flux 224 is applied to the wiring member 142 with strong pressure, so that the flux 224 can be applied to a sufficient thickness over the entirety of the wiring member 142. That is, the flux 224 can be uniformly applied to the wiring member 142 as a whole regardless of the surface state of the wiring member 142 . For example, even if there is a part where the flux 224 is difficult to apply to the wiring member 142 and a part where the flux 224 is well applied, the flux 224 is forcibly applied with strong pressure by the spray member 222 to the wiring member ( 142), the flux 224 may be applied in a sufficient thickness over the entire portion. For example, a portion to which the flux 224 is difficult to apply may be a portion having a poor surface condition, cleanliness, or the like, having an oxide film formed thereon, having small surface roughness, or having hydrophobicity. Also, a portion to which the flux 224 is well applied may be a portion having a good surface condition, cleanliness, or the like, no oxide film formed, large surface roughness, or hydrophilicity. That is, even if the surface morphology (eg, the distribution of the solder layer 142b, the distribution of the oxide film, etc.) or cleanliness is not uniform, the flux 224 is forced by the strong pressure of the spray member 222 to the wiring member 142 ), so that the flux 224 can be applied with a sufficient thickness in the entire area. In particular, the flux 224 may be applied to a sufficient thickness over the entire area of the wiring member 142 having a rounded cross section.

For example, the flux 224 may be formed over the entire (for example, 95% to 100%, more specifically, 99% to 100%) of the surface of the wiring member 142 in the longitudinal direction, the thickness of which is It may be 2um to 7um. In this way, the flux 224 can be formed to a sufficient thickness on the entire surface of the wiring member 142 by the spray method.

For example, in this embodiment, the wiring member 142 may have a circular cross section, but since the flux 224 is applied and supplied to the wiring member 142, the surface of the solar cell 150 does not have to be coated with the flux 224. do. In addition, since the flux 224 is applied to the circular wiring member 142, the amount of the flux 224 attached to the surface of the solar cell 150 can be kept to a minimum, so as to maintain excellent performance of the solar cell 150. can do.

On the other hand, unlike the present embodiment, when the wiring material 142 is applied by dipping the flux 224 into the flux 224, resistance due to surface tension occurs in a portion where the flux 224 is difficult to apply, and the bubble 224c is located. As a result, the flux layer 224a may not be formed in a portion where the flux 224 is difficult to apply. In particular, when the cross-sectional shape of the wiring member 142 has a rounded portion or is circular, resistance due to surface tension may be greater. That is, when the wiring member 142 has a specific shape as described above, unlike the present embodiment, when the flux 224 is applied by the immersion process, the possibility that the flux 224 is not entirely formed on the wiring member 142 is higher. It gets bigger.

In this embodiment, a plurality of spray members 222 having at least one spraying unit 222a may be provided, and/or each spraying unit 222 may include a plurality of spraying units 222a. . When one spray member 222 having one injection unit 222a is provided, the distance between the spray member 222 and the wiring member 142 is such that all of the flux 224 can be applied to the plurality of wiring members 142. should be very large. Therefore, the distance D1 between the spray member 222 and the wiring member 142 can be reduced by providing a plurality of spray members 222 and/or having the spray member 222 have a plurality of spraying parts 222a. there is.

For example, the distance D1 between the plurality of wiring members 142 and the spray member 222 may be 1 cm to 50 cm. If the distance D1 between the wiring member 142 and the spray member 222 is less than 1 cm, the distance D1 between the plurality of wiring members 142 and the spray member 222 is too short, so that the entirety of the plurality of wiring members 142 It may be difficult for the flux 224 to be applied, or a large number of spray members 222 may need to be disposed. When the distance D1 between the wiring member 142 and the spray member 222 exceeds 50 cm, the pressure when the flux 224 sprayed from the spray member 222 reaches the wiring member 142 is not large, so the wiring member ( Flux 224 may not be applied throughout 142 . In addition, it may be difficult to reduce the size of the wiring material attachment device 200 because the size of the flux unit 220 increases. For example, the distance D1 between the plurality of wiring members 142 and the spray member 222 may be 3 cm to 15 cm so that the flux 224 can be stably applied to the entire wiring member 142 .

In this case, the pitch D2 between adjacent spraying parts 222a in the plurality of spraying parts 222a may be 1 cm to 3 cm, and the pitch D3 between the wiring members 142 may be 4.75 mm to 26.13 mm. However, the present invention is not limited thereto. The pitch D2 between the spraying parts 222a may vary according to the number of the spraying parts 222a, and the pitch D3 between the wiring members 142 may be a level at which no interference occurs or the solar cell 150 It may be the same as or similar to the pitch of the wiring member 142 when attached.

Alternatively, the ratio of the pitch D2 between adjacent jetting parts 222a in the plurality of jetting parts 222a to the pitch D3 between the wiring members 142 may be 1:1 to 1:4. The flux 224 sprayed from the injection unit 222a is simultaneously applied to the plurality of wiring members 142 in a widely spread state at the portion where the plurality of wiring members 142 are located. At least a portion (particularly, a side portion) of the injected flux 224 may be injected so as to overlap each other at a portion where the plurality of wiring members 142 are located. According to this, the flux 224 can be evenly sprayed to the plurality of wiring members 142 .

For example, the injection pressure of the flux 224 injected from the injection unit 222a may be 0.15 MPa to 0.4 MPa. If the injection pressure of the flux 224 injected from the injection unit 222a is 0.15 MPa, the injection pressure may not be sufficient and the flux 224 may not be evenly injected to the wiring member 142 . When the injection pressure of the flux 224 injected from the injection unit 222a exceeds 0.4 MPa, the characteristics of the wiring member 142 may be changed by applying pressure to the wiring member 142 . However, the present invention is not limited thereto, and the injection pressure may have a different value depending on the width of the wiring member 142, the distance D1 between the wiring member 142 and the spray member 222, and the like.

In FIG. 8 , it is illustrated that one injection unit 222a is disposed to spray the flux 224 to one wiring member 142 . However, the present invention is not limited thereto. For example, one injection unit 222a may be disposed to spray the flux 224 to a plurality of wiring members 142, and a plurality of injection units 222a may spray the flux 224 to one wiring member 142. It may also be arranged to inject.

In addition, in (a) of FIGS. 8 and 9, it is exemplified that each injection unit 222a is provided with one injection hole 222b through which the flux 224 is injected. However, the present invention is not limited thereto. Therefore, as shown in (b) and (c) of FIG. 9, a plurality of injection holes 222b may be provided in each injection unit 222a, and the arrangement may be variously modified.

In the drawing, it is exemplified that the spray device 220 is disposed on the upper side of the plurality of wiring members 142 to more stably spray the flux to the plurality of wiring members 142 by gravity. However, the present invention is not limited thereto. The position of the spray member 220 may be variously modified, such as the spray member 220 being located on the lower side or side of the plurality of wiring members 142 .

As described above, if the spray member 222 is provided, the flux 224 can be uniformly and entirely applied to the wiring member 142 . However, since the amount of the flux 224 that is sprayed from the spray member 222 but is not applied to the wiring member 142 and discarded increases, the cost of discarding the flux 224 may greatly increase. Considering this, in this embodiment, the supply member 226 providing the flux 224 includes a recycling member 226a that collects and provides the flux 224 sprayed from the spray member 222 and re-collected. At this time, the supply member 226 further includes a raw material supply member 226a for supplying the unused flux 224 to the recycling member 226a, so that the amount of the re-collected and recycled flux 224 may not be sufficient. In this case, a sufficient amount of flux 224 may be provided to the spray member 222 by providing new flux 224 unused to the recirculating member 226a.

More specifically, the recirculation member 226a is located below the spray member 222 and has a receiving portion 2262 in which the flux 224 sprayed from the spray member 222 is accommodated, and is connected to the receiving portion 2262. A drain tank 2264 in which the flux 224 discharged from the receiving portion 2262 is collected, and a desired amount of the flux 224 collected in the drain tank 2264 is supplied to the spray member 222 A drive member 2266 may be included. The drive member 2266 may be of various configurations, such as a pump capable of providing a desired amount of the flux 224 located in the drain tank 2264 to the spray member 222 .

The raw material supply member 226b may be connected to the recycling member 226a to provide new flux 224 not used to the recycling member 226a. In the drawing, as an example, it is illustrated that the raw material supply member 226b is connected to the drain tank 2264 and is composed of a supply tank 2268 supplying new flux 224 to the drain tank 2264. According to this, it is possible to evenly mix the used flux 224 and the unused flux 224 in the drain tank 2264, and supply the mixed flux 224 to the supply pipe 2264a. However, the present invention is not limited thereto, and various modifications such as connecting the raw material supply member 226b to the supply pipe 2264a or directly to the spray member 222 are possible.

An adjusting member 2269 capable of adjusting the supply amount of the supplied flux 224 may be positioned between the drain tank 2264 and the supply tank 2268 . The adjusting member 2269 may be a pump or a valve that can supply the flux 224 stored in the new supply tank 2268 to the drain tank 2264 in a desired amount when necessary.

The accommodating part 2262 may be located below the spray member 222 and may have an internal space in which the flux 224 sprayed from the spray member 222 is accommodated away from each other. The flux 224 accommodated in the accommodating part 2262 passes through the outlet 2262a, flows along the connection pipe 2262b connecting the accommodating part 2262 and the drain tank 2264, and is collected in the drain tank 2264. there is.

In the accommodating part 2262, the discharge port 2262a may be located in various positions capable of discharging the flux 224, for example, it may be located on the bottom surface of the accommodating part 2262. At this time, the bottom surface around the discharge unit 2262a may be formed as an inclined surface that slopes downward while facing the discharge port 2262a. Then, the flux 224 located in the accommodating part 2262 can easily move to the outlet 2262a along the inclined surface and be discharged through the outlet 2262a. In addition, a net 2262c filtering impurities may be positioned at or above the outlet 2262a. Accordingly, only the flux 224 to be recycled may be discharged through the outlet 2262a.

A supply pipe 2264a connecting the drain tank 2264 and the spray member 222 may be provided. The amount of the flux 224 flowing through the supply pipe 2264a or the amount and concentration of the flux 224 supplied to the spray member 222 may be measured by a sensor (not shown). For example, the amount and concentration of the flux 224 may be checked in real time by a sensor. In addition, when the amount of flux 224 is insufficient or the concentration of flux 224 is higher than a predetermined standard due to recirculation, the raw material supply member 226b supplies new flux 224 to the drain tank 2264. In particular, since the concentration of the recycled flux 224 may gradually increase, when the concentration is higher than a predetermined standard, the raw material supply member 226b provides new unused flux 224 having a lower concentration than the recycled flux 224. to lower the concentration of the flux 224.

Also, in this embodiment, a blocking portion 2262d for sealing a space between the spray member 222 and the receiving portion 2262 from the outside may be included. Accordingly, during the spraying process, the space between the spray member 222 and the receiving portion 2262 may be blocked from the outside and sealed. As a result, the flux 224 is sprayed at a high pressure, and it is possible to prevent vaporization as much as possible, and it is possible to prevent the flux 224 from leaking out during the spraying process.

For example, the blocking part 2262d has a shape surrounding the side of the space between the spray member 222 and the accommodating part 2262 and can move up and down. Then, when the wiring member 142 enters or exits, the blocking part 2262d is positioned at the first position to allow the space between the spray member 222 and the receiving part 2262 to communicate with the outside, so that the wiring member 142 can easily move. make it possible Also, when the spray process is performed, the blocking portion 2262d may be positioned at a second position to seal the space between the spray member 222 and the accommodating portion 2262 from the outside. Alternatively, the blocking portion 2262d may have a chamber shape in which the spray member 222 and the accommodating portion 2262 are located and a door through which the wiring member 142 passes. In addition, the blocking portion 2262d may have various structures, methods, and shapes.

The flux 224 applied to the wiring member 142 through the flux unit 220 hardens while passing through the drying unit 230 to form a flux layer 224a positioned while surrounding the outer circumferential surface of the wiring member 142. The thickness of the flux layer 224a thus formed may be 2um to 7um. Due to the thickness of the flux layer 224a, oxide located on the surface of the wiring member 142 can be effectively removed, thereby improving bonding characteristics between the wiring member 142 and the solar cell 150. However, the present invention is not limited thereto, and the thickness of the flux layer 224a may have other values.

The drying unit 230 may have various structures capable of drying the flux 224 . For example, the drying unit may dry the flux 224 by wind, heat, or the like. The present invention is not limited to the structure and method of the drying unit 230 .

The drying process in the drying unit 230 may be performed at a process temperature of 70°C to 90°C for 1 second to 10 minutes. If the process temperature is less than 70 ° C or the process time is less than 1 second, drying may not be performed well. If the process temperature exceeds 90 °C and the process time exceeds 10 minutes, the cost and time of the process may increase. In consideration of process efficiency and the like, the drying process time may be 1 second to 5 seconds. However, the present invention is not limited thereto and the process temperature and time may have other values.

For simplicity and clarity, a specific structure of the drying unit 230 is not shown, and various structures may be applied. The flux unit 220 and the drying unit 230 may be located inside one body. However, the present invention is not limited thereto, and the arrangement of the flux unit 220 and the drying unit 230 may be modified in various ways.

According to the wiring member attachment device 200 according to the present embodiment, the wiring member 142 including a solder layer for soldering including a rounded portion may be attached to the solar cell 150 by an automated system. In addition, since the flux 224 can be recycled and reused by providing a recycling member 226a, manufacturing costs can be greatly reduced. In particular, in the wiring member 142 including the rounded portion, a spray process may be used to uniformly form the flux layer 224a. ) is very large. The recycling member 226a according to the present embodiment is applied to the wiring material attaching device 200 to which the spray process is applied, and can greatly reduce the waste of the flux 224 that may occur in this case.

Features, structures, effects, etc. according to the above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified with respect to other embodiments by those skilled in the art in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

100: solar panel
150: solar cell
142: wiring material
200: wiring material attachment device
210: wiring material supply unit
220: flux part
222: spray member
224 Flux
226: supply member
226a: recycling member
226b: raw material supply member
230: drying unit
240: wiring material withdrawal unit
250: attachment

Claims (16)

a flux unit including a spray member having an injection unit for spraying flux to a wiring member including a core layer and a solder layer formed on a surface of the core layer, and a supply member supplying the flux to the spray member; and
Attaching portion for attaching the wiring member to the solar cell by soldering the solder layer by pressing the wiring member to the solar cell while applying heat
including,
The supply member includes a recycling member that collects and recirculates the flux sprayed from the spray member and provides it to the spray member,
The recirculation member may include an accommodating portion located below the spray member and accommodating the flux sprayed from the spray member, a drainage tank connected to the accommodating portion and collecting the flux discharged from the accommodating portion, and the drainage tank. And a driving member for supplying the flux collected in to the spray member,
The accommodating part includes an outlet connected to a connection pipe connecting the accommodating part and the drain tank,
The wiring material attachment device of the solar cell panel, wherein the discharge port is located on the bottom surface of the accommodating portion, and the bottom surface is composed of an inclined surface inclined downward toward the discharge port. delete According to claim 1,
A wiring material attachment device for a solar cell panel in which the driving member includes a pump. delete According to claim 1,
A wiring material attachment device for a solar cell panel in which a net for filtering impurities is located at the outlet or above the outlet. According to claim 1,
The supply member further comprises a raw material supply member connected to the recycling member to provide unused flux to the recycling member. According to claim 6,
The raw material supply member is connected to the drain tank to provide unused flux to the drain tank. According to claim 7,
A supply pipe connecting the drain tank and the spray member is provided,
wherein the raw material supply member supplies unused flux to the drain tank when the concentration of the flux flowing through the supply pipe is higher than a predetermined standard or the amount of the flux is insufficient. According to claim 8,
The raw material supply member provides an unused flux having a lower concentration than the concentration of the flux flowing through the supply pipe to the drain tank when the concentration of the flux flowing through the supply pipe is higher than a predetermined standard Wiring material attachment device of a solar cell panel. According to claim 1,
Wiring material attachment device of a solar cell panel including a blocking portion for sealing a space between the spray member and the receiving portion from the outside. According to claim 1,
In the flux part, a plurality of wiring members are located side by side at intervals from each other,
A wiring material attachment device for a solar cell panel in which a plurality of spray members are provided and a plurality of spraying parts are provided, or a plurality of spraying parts are provided on each spray member. According to claim 11,
A wiring material attachment device for a solar cell panel in which the distance between the wiring material and the spray member is 1 cm to 50 cm. According to claim 11,
Wiring material attachment device of a solar cell panel in which the distance between the plurality of spraying parts is 1 cm to 3 cm. According to claim 11,
A wiring material attachment device for a solar cell panel wherein the ratio of the distance between the plurality of spraying parts to the distance between the wiring materials is 1:1 to 1:4. According to claim 1,
Wiring material attachment device of a solar cell panel wherein the spraying speed or spraying pressure of the flux sprayed by the spray member is 0.15 MPa to 0.4 MPa. According to claim 1,
The wiring material includes a rounded portion or has a circular cross-sectional shape. A wiring material attachment device for a solar cell panel.

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