KR101938644B1 - Apparatus and method for attaching interconnector of solar cell panel - Google Patents

Abstract

A method of attaching a wiring material to a solar cell panel according to an embodiment of the present invention includes the steps of: forming a first wiring material-jig combination body by fixing a plurality of first wiring materials to a jig; Placing the first wiring-jig combination on a workbench; Fixing the plurality of first wiring materials and the first solar cell; Separating the jig from the plurality of first wiring materials; And attaching the plurality of first wiring materials to the first solar cell by applying heat to the plurality of first wiring materials and the first solar cell fixed to each other.

Description

[0001] APPARATUS AND METHOD FOR ATTACHING INTERCONNECTOR OF SOLAR CELL PANEL [0002]

The present invention relates to an apparatus and method for attaching a wiring material to a solar cell panel, and more particularly, to an apparatus and method for attaching a wiring material to a solar cell panel to which a wiring material for connecting a plurality of solar cells is attached.

With the recent depletion of existing energy sources such as oil and coal, interest in alternative energy to replace them is increasing. Among them, solar cells are attracting attention as a next-generation battery that converts solar energy into electric energy.

A plurality of such solar cells are connected in series or in parallel by a ribbon, and are manufactured in the form of a solar cell panel by a packaging process for protecting a plurality of solar cells. Solar panels require long-term reliability because they must be developed for a long time in various environments. At this time, conventionally, a plurality of solar cells are connected by a ribbon.

However, the apparatus and method for attaching such ribbons are complicated and productivity may be deteriorated. And a device and a method for attaching the ribbon when a wiring material of a different structure is used instead of the ribbon.
With reference to patent document KR 10-2014-0030038, studies are continuing on methods and apparatus for manufacturing solar cell strings.

An object of the present invention is to provide an apparatus and method for attaching a wiring material to a solar cell panel, which can improve productivity by attaching a wiring material to a solar cell by an automated system.

A method of attaching a wiring material to a solar cell panel according to an embodiment of the present invention includes the steps of: forming a first wiring material-jig combination body by fixing a plurality of first wiring materials to a jig; Placing the first wiring-jig combination on a workbench; Fixing the plurality of first wiring materials and the first solar cell; Separating the jig from the plurality of first wiring materials; And attaching the plurality of first wiring materials to the first solar cell by applying heat to the plurality of first wiring materials and the first solar cell fixed to each other.

An apparatus for attaching a wiring material to a solar cell panel according to an embodiment of the present invention includes: a wiring material fixing unit for fixing a plurality of wiring materials to a jig to form a wiring-jig combination; A work table on which the wiring material-jig combination body is placed to fix the plurality of wiring materials and the solar cell; And a heat source unit for applying heat to the plurality of wiring materials and the solar cells fixed to each other and attaching them. The jig is separated from the plurality of wiring materials before passing through the heat source portion.

According to the apparatus and method for attaching a wiring material to a solar cell panel according to this embodiment, since the jig is separated from a plurality of wiring materials before passing through the heat source unit, the number of operating jigs can be minimized. Thus, the structure of the wiring material attaching device can be simplified and the productivity can be improved. At this time, if a plurality of wiring materials and the solar cell are fixed by exhaust absorption, they can be stably fixed without damaging the plurality of wiring materials and the solar cell. And a plurality of wiring materials cut by the cutting portion are fixedly attached to the solar cell, so that the structure and manufacturing process can be simplified. In addition, the plurality of wiring materials can be automated by passing through the heat source portion through the conveyor belt in a state where a plurality of wiring materials are disposed on both sides of the solar cell. Thus, the wiring material including the coating layer for soldering including the rounded portion can be attached to the solar cell by an automated system.

1 is a perspective view illustrating a solar cell panel according to an embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II in FIG.
3 is a partial cross-sectional view illustrating an example of a solar cell included in the solar cell panel of FIG. 1 and a wiring material connected thereto.
FIG. 4 is a perspective view schematically showing a first solar cell and a second solar cell included in the solar cell panel shown in FIG. 1 and connected by a wiring material.
5 is a partial plan view showing an enlarged view of a portion A in Fig.
6 is a schematic view showing a part of a wiring material attaching apparatus for a solar cell panel according to an embodiment of the present invention.
7 is a schematic view showing another part of a wiring material attaching apparatus for a solar cell panel according to an embodiment of the present invention.
8 is a conceptual diagram schematically showing a work table, a heat source, and an upper fixing member supply unit of a wiring material attaching apparatus for a solar cell panel according to an embodiment of the present invention.
Fig. 9 is a diagram showing the operation of the cutout portion included in the wiring material attaching apparatus shown in Fig. 6;
10 is a perspective view showing a state in which a solar cell and a wiring material disposed on the solar cell are fixed using an upper fixing member included in the wiring material attaching apparatus shown in Fig.
11 is a block diagram schematically showing a wiring material attaching apparatus 200 according to an embodiment of the present invention.
12A to 12G are views for explaining the operation of the attaching portion of the wiring material attaching apparatus shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it is needless to say that the present invention is not limited to these embodiments and can be modified into various forms.

In the drawings, the same reference numerals are used for the same or similar parts throughout the specification. In the drawings, the thickness, the width, and the like 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.

Wherever certain parts of the specification are referred to as "comprising ", the description does not exclude other parts and may include other parts, unless specifically stated otherwise. Also, when a portion of a layer, film, region, plate, or the like is referred to as being "on" another portion, it also includes the case where another portion is located in the middle as well as the other portion. When a portion of a layer, film, region, plate, or the like is referred to as being "directly on" another portion, it means that no other portion is located in the middle.

Hereinafter, an apparatus and method for attaching a wiring material for a solar cell panel according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. An explanation will be given of a solar cell panel including a wiring material attached by a method and apparatus for attaching a solar cell panel according to an embodiment of the present invention and a method for attaching a wiring material for a solar cell panel according to the present embodiment . Hereinafter, the expressions "first "," second ", and the like are used for distinguishing between each other, and the present invention is not limited thereto.

FIG. 1 is a perspective view showing a solar cell panel according to an embodiment of the present invention, and FIG. 2 is a sectional view cut along a line II-II in FIG.

1 and 2, the solar cell panel 100 according to the present embodiment includes a plurality of solar cells 150 and a wiring material 142 for electrically connecting the plurality of solar cells 150. The solar cell panel 100 includes a sealing member 130 that surrounds and seals a plurality of solar cells 150 and a wiring member 142 that connects the solar cells 150 and a front surface 130 that is positioned on the front surface of the solar cell 150 on the sealing member 130. [ A substrate 110 and a rear substrate 120 positioned on the back surface of the solar cell 150 on the sealing member 130. This will be explained in more detail.

First, the solar cell 150 may include a photoelectric conversion unit that converts the solar cell into electric energy, and an electrode that is electrically connected to the photoelectric conversion unit and collects and transfers a current. The plurality of solar cells 150 may be electrically connected in series, parallel, or series-parallel by the wiring member 142. Specifically, the wiring material 142 electrically connects two neighboring solar cells 150 among the plurality of solar cells 150.

The bus ribbons 145 are connected by the wiring members 142 to connect both ends of the wiring material 142 of the solar cell 150 (that is, the solar cell string) forming one row alternately. The bus ribbon 145 may be disposed at an end of the solar cell string and in a direction intersecting the end. These bus ribbons 145 may connect solar cell strings adjacent to each other, or may connect solar cell strings or solar cell strings to a junction box (not shown) that prevents current flow backward. The material, shape, connection structure, etc. of the bus ribbon 145 can be variously modified, and the present invention is not limited thereto.

The sealing material 130 includes a first sealing material 131 located on the front surface of the solar cell 150 connected by the wiring material 142 and a second sealing material 132 located on the rear surface of the solar cell 150 . The first sealing material 131 and the second sealing material 132 prevent moisture and oxygen from entering and chemically bind each element of the solar cell panel 100. The first and second sealing members 131 and 132 may be made of an insulating material having translucency and adhesiveness. For example, an ethylene-vinyl acetate copolymer resin (EVA), a polyvinyl butyral, a silicon resin, an ester-based resin, an olefin-based resin, or the like may be used for the first sealant 131 and the second sealant 132. The rear substrate 120, the second sealing material 132, the solar cell 150, the first sealing material 131 and the front substrate 110 are integrated by a lamination process using the first and second sealing materials 131 and 132, So that the solar cell panel 100 can be constructed.

The front substrate 110 is disposed on the first sealing material 131 to constitute the front surface of the solar cell panel 100 and the rear substrate 120 is disposed on the second sealing material 132 to form the front surface of the solar cell 150. [ Configure the rear. The front substrate 110 and the rear substrate 120 may be formed of an insulating material capable of protecting the solar cell 150 from external shock, moisture, ultraviolet rays, or the like. The front substrate 110 may be made of a light transmissive material through which light can be transmitted, and the rear substrate 120 may be made of a light transmissive material, a non-transmissive material, or a reflective material. For example, the front substrate 110 may be formed of a glass substrate or the like and the rear substrate 120 may have a TPT (Tedlar / PET / Tedlar) type or a base film (e.g., polyethylene terephthalate ) May include a polyvinylidene fluoride (PVDF) resin layer formed on at least one side of the substrate.

However, the present invention is not limited thereto. Accordingly, the first and second sealing materials 131 and 132, the front substrate 110, and the rear substrate 120 may include various materials other than those described above, and may have various shapes. For example, the front substrate 110 or the back substrate 120 may have various shapes (e.g., substrate, film, sheet, etc.) or materials.

3, a solar cell included in a solar cell panel according to an embodiment of the present invention and wiring materials connected thereto will be described in more detail.

3 is a partial cross-sectional view illustrating an example of a solar cell included in the solar cell panel of FIG. 1 and a wiring material connected thereto.

3, a solar cell 150 includes a semiconductor substrate 160, conductive regions 20 and 30 formed on the semiconductor substrate 160 or on the semiconductor substrate 160, And 30, respectively. The conductive regions 20 and 30 may include a first conductive type region 20 having a first conductive type and a second conductive type region 30 having a second conductive type. The electrodes 42 and 44 may include a first electrode 42 connected to the first conductive type region 20 and a second electrode 44 connected to the second conductive type region 30. The first and second passivation films 22 and 32, the antireflection film 24, and the like.

The semiconductor substrate 160 may be composed of a crystalline semiconductor including a single semiconductor material (for example, a Group 4 element). In one example, the semiconductor substrate 160 may be composed of a single crystal or polycrystalline semiconductor (e.g., single crystal or polycrystalline silicon). In particular, the semiconductor substrate 160 may be composed of a single crystal semiconductor (for example, a single crystal semiconductor wafer, more specifically, a single crystal silicon wafer). Then, the solar cell 150 is based on the semiconductor substrate 160 made of a single crystal semiconductor having a high crystallinity and few defects. Accordingly, the solar cell 150 can have excellent electrical characteristics.

The front surface and / or the rear surface of the semiconductor substrate 160 may be textured to have irregularities. The irregularities may be, for example, a pyramid shape having an irregular size, whose outer surface is composed of the (111) surface of the semiconductor substrate 160. If the surface roughness of the front surface of the semiconductor substrate 160 is increased by texturing, the reflectance of light incident through the front surface of the semiconductor substrate 160 may be reduced. Accordingly, the amount of light reaching the pn junction formed by the base region 10 and the first or second conductivity type regions 20 and 30 can be increased, so that the optical loss can be minimized. In this embodiment, the irregularities are formed on the front surface and the rear surface of the semiconductor substrate 160, respectively. However, the present invention is not limited thereto. Therefore, concavities and convexities may be formed on at least one of the front surface and the rear surface of the semiconductor substrate 160, and irregularities may not be formed on the front surface and the rear surface.

In this embodiment, the semiconductor substrate 160 includes a base region 10 having a first or second conductivity type doped with a first or second conductivity type dopant at a low doping concentration. At this time, the base region 10 of the semiconductor substrate 160 may have a lower doping concentration, higher resistance, or lower carrier concentration than one of the first and second conductivity type regions 20 and 30 having the same conductivity type . As an example, the base region 10 may have a second conductivity type in this embodiment.

The semiconductor substrate 160 may include a first conductive type region 20 and a second conductive type region 30. The base region 10 and the conductive regions 20 and 30 constituting the semiconductor substrate 160 in the present embodiment are regions having a crystal structure of the semiconductor substrate 160 and different conductivity types and doping concentrations. For example, in a semiconductor substrate 160, a region including a first conductive dopant and having a first conductivity type is defined as a first conductive type region 20, and a second conductive type dopant is included at a low doping concentration A region having a second conductivity type is defined as a base region 10 and a region having a second conductivity type is doped with a doping concentration higher than that of the base region 10 by a second conductivity type dopant ). ≪ / RTI >

The first and second conductivity type regions 20 and 30 may be formed as a whole on the front surface and the rear surface of the semiconductor substrate 160. Here, the term " entirely formed " includes not only a complete formation but also a partial formation of an unavoidable region. Thus, the first and second conductivity type regions 20 and 30 can be formed with a sufficient area without additional patterning.

The first conductivity type region 20 may form an emitter region that forms a pn junction with the base region 10. [ The second conductive type region 30 may form a back electric field region forming a back surface field. The rear electric field area serves to prevent carriers from being lost by recombination on the surface of the semiconductor substrate 160 (more precisely, the rear surface of the semiconductor substrate 160).

In this embodiment, the conductive regions 20 and 30 are formed by doping a dopant into the semiconductor substrate 160 to form a doping region constituting a part of the semiconductor substrate 160. However, the present invention is not limited thereto. Therefore, at least one of the first conductive type region 20 and the second conductive type region 30 may be formed of an amorphous, microcrystalline or polycrystalline semiconductor layer or the like, which is formed on the semiconductor substrate 160 as a separate layer. Other variations are possible.

In this embodiment, the first conductivity type region 20 and the second conductivity type region 30 have a homogeneous structure having a uniform doping concentration as a whole. However, the present invention is not limited thereto. Thus, in another embodiment, at least one of the first conductive type region 20 and the second conductive type region 30 may have a selective structure. In the selective structure, it is possible to have a high doping concentration and a low resistance in the portions adjacent to the electrodes 42 and 44 among the conductive type regions 20 and 30, and a low doping concentration and a high resistance in other portions. In yet another embodiment, the second conductivity type region 30 may have a local structure. In the local structure, the second conductivity type region 30 may be locally formed corresponding to the portion where the second electrode 44 is formed.

The first conductivity type dopant included in the first conductivity type region 20 may be an n type or a p type dopant and the second conductivity type dopant included in the base region 10 and the second conductivity type region 30 May be a p-type or n-type dopant. As the p-type dopant, a Group 3 element such as boron (B), aluminum (Al), gallium (Ga) or indium (In) , Bismuth (Bi), and antimony (Sb). The second conductive dopant in the base region 10 and the second conductive dopant in the second conductive type region 30 may be the same material or different materials.

For example, the first conductivity type region 20 may have a p-type, the base region 10 and the second conductivity type region 30 may have an n-type. When the pn junction formed by the first conductivity type region 20 and the base region 10 is irradiated with light, electrons generated by the photoelectric effect move toward the rear surface of the semiconductor substrate 160, And holes are collected toward the front side of the semiconductor substrate 160 and collected by the first electrode 42. Thereby, electric energy is generated. Then, holes having a slower moving speed than electrons may move to the front surface of the semiconductor substrate 160, rather than the rear surface thereof, thereby improving the conversion efficiency. However, the present invention is not limited thereto, and it is also possible that the base region 10 and the second conductivity type region 30 have a p-type and the first conductivity type region 20 has an n-type.

The first and second passivation films 22 and 32 and the anti-reflection film 24 may be formed on the surface of the semiconductor substrate 160. Such an insulating film may be composed of an undoped insulating film which does not contain a dopant separately.

More specifically, a re-passivation film 22 is formed (e.g., contacted) on the front surface of the semiconductor substrate 160, more precisely on the first conductive region 20 formed in the semiconductor substrate 160, An antireflection film 24 may be formed (e.g., in contact) on the first passivation film 22. The second passivation film 32 may be formed on the rear surface of the semiconductor substrate 160 and more precisely on the second conductive type region 30 formed on the semiconductor substrate 160. [

The first passivation film 22 and the antireflection film 24 are substantially formed on the semiconductor substrate 160 except for the portion corresponding to the first electrode 42 (more precisely, the portion where the first opening portion 102 is formed) Can be formed on the entire front surface. Similarly, the second passivation film 32 is formed on the entire rear surface of the semiconductor substrate 160 except the portion corresponding to the second electrode 44 (more precisely, the portion where the second opening 104 is formed) .

The first and second passivation films 22 and 32 are formed in contact with the second conductivity type regions 20 and 30 to immobilize defects existing in the surface or bulk of the conductive type regions 20 and 30. Accordingly, it is possible to increase the open-circuit voltage (Voc) of the solar cell 150 by removing recombination sites of the minority carriers. The antireflection film 24 reduces the reflectance of light incident on the front surface of the semiconductor substrate 160. Accordingly, the amount of light reaching the pn junction formed at the interface between the base region 10 and the first conductive type region 20 can be increased by lowering the reflectance of light incident through the entire surface of the semiconductor substrate 160. Accordingly, the short circuit current Isc of the solar cell 150 can be increased. In this way, the efficiency of the solar cell 150 can be improved by increasing the open-circuit voltage and the short-circuit current of the solar cell 150 by the passivation films 32 and 22 and the anti-reflection film 24.

For example, the passivation films 22 and 32 or the antireflection film 24 may be formed of a material selected from the group consisting of a silicon nitride film, a silicon nitride film containing hydrogen, a silicon oxide film, a silicon oxynitride film, an aluminum oxide film, MgF ₂ , ZnS, TiO ₂ and CeO ₂ And may have a multilayer structure in which any one single film or two or more films selected is combined. For example, the first or second passivation film 22, 32 may include a silicon oxide film having a fixed positive charge, a silicon nitride film, or the like when the conductive type regions 20, 30 have an n type, An aluminum oxide film having a fixed negative charge, and the like. In one example, the antireflective film 24 may comprise silicon nitride.

However, the present invention is not limited thereto, and the passivation films 22 and 32 and the anti-reflection film 24 may include various materials. The laminated structure of the insulating film stacked on the front surface and / or the rear surface of the semiconductor substrate 160 can also be variously modified. For example, the insulating film may be stacked in a stacking order different from the stacking order described above. Or the above-described first and second passivation films 22 and 32 and the antireflection film 24, which do not have at least one of the above-described first and second passivation films 22 and 32 and the antireflection film 24, It is also possible to provide another insulating film. Other variations are possible.

The first electrode 42 is electrically connected to the first conductive type via the first opening 102 formed in the insulating film (for example, the first passivation film 22 and the antireflection film 24) And is electrically connected to the region 20. The second electrode 44 is electrically connected to the second conductivity type region 30 through the second opening 104 formed in the insulating film (for example, the second passivation film 32) located on the rear surface of the semiconductor substrate 160 Lt; / RTI > For example, the first electrode 42 may contact the first conductivity type region 20 and the second electrode 44 may contact the second conductivity type region 30.

The first and second electrodes 42 and 44 may be formed of various materials (for example, a metal material) and may have various shapes. The shape of the first and second electrodes 42 and 44 will be described later.

As described above, in this embodiment, the first and second electrodes 42 and 44 of the solar cell 150 have a predetermined pattern, so that the solar cell 150 can receive light from the front and back surfaces of the semiconductor substrate 160 It has a bi-facial structure. Accordingly, the amount of light used in the solar cell 150 can be increased to contribute to the efficiency improvement of the solar cell 150.

However, the present invention is not limited thereto, and it is also possible that the second electrode 44 is formed entirely on the rear side of the semiconductor substrate 160. It is also possible that the first and second conductivity type regions 20 and 30 and the first and second electrodes 42 and 44 are located on one side (for example, the rear side) of the semiconductor substrate 160, It is also possible that at least one of the first and second conductivity type regions 20 and 30 is formed over both sides of the semiconductor substrate 160. That is, the solar cell 150 described above is merely an example, and the present invention is not limited thereto.

The solar cell 150 described above is electrically connected to the neighboring solar cell 150 by the wiring member 142 positioned (for example, in contact with) the first electrode 42 or the second electrode 44, Will be described in more detail with reference to FIG. 4 together with FIGS. 1 to 3. FIG.

4 is a perspective view schematically illustrating a first solar cell 151 and a second solar cell 152 included in the solar cell panel 100 shown in FIG. 1 and connected by a wiring material 142. FIG. In FIG. 4, the first and second solar cells 151 and 152 are schematically shown only on the semiconductor substrate 160 and the electrodes 42 and 44, respectively.

4, two solar cells 150 (for example, the first solar cell 151 and the second solar cell 152) which are adjacent to each other among the plurality of solar cells 150 are connected to the wiring member 142 ). The wiring member 142 is electrically connected to the first electrode 42 positioned on the front surface of the first solar cell 151 and the second solar cell 152 positioned on one side The second electrode 44 located on the rear side of the second electrode 44 is connected. And the other wiring material 1420a is electrically connected to the second electrode 44 located on the rear surface of the first solar cell 151 and the other electrode on the other side of the first solar cell 151 The first electrode 42 is connected. Another wiring material 1420b is disposed between the first electrode 42 located on the front surface of the second solar cell 152 and the rear surface of another solar cell positioned on one side The second electrode 44 is connected to the second electrode 44. Accordingly, the plurality of solar cells 150 can be connected to each other by the wiring materials 142, 1420a, and 1420b. Hereinafter, the description of the wiring material 142 can be applied to all the wiring materials 142, 1420a, and 1420b that connect the two adjacent solar cells 150 to each other.

In this embodiment, the wiring material 142 is formed on the front surface of the first solar cell 151 by the first electrode 42 (more specifically, the bus bar line of the first electrode 42 (reference numeral 42b in Fig. 5, A second portion 162 extending from the first edge 161 to the opposite second edge 162 and a second portion extending from the rear surface of the second solar cell 152 to the second electrode 44 A second portion extending from the first edge 161 to the opposite second edge 162 while being connected to the second electrode 44 (specifically, the bus bar line of the second electrode 44) And a third portion extending from the front surface of the second edge 162 of the second solar cell 152 to the rear surface of the second solar cell 152 and connecting the first portion and the second portion. As a result, after the wiring member 142 traverses the first solar cell 151 in a partial area of the first solar cell 151, the second solar cell 152 traverses the second solar cell 152 in a partial area of the second solar cell 152 Can be located. As described above, the wiring member 142 has a smaller width than the first and second solar cells 151 and 152, and a part (for example, the bus bar line 42b) of the first and second solar cells 151 and 152, The first and second solar cells 151 and 152 can be effectively connected even by a small area.

The wiring member 142 may be arranged to extend along the bus bar line 42b while contacting the bus bar line 42b on the bus bar line 42b at the first and second electrodes 42 and 44 have. Thus, the wiring material 142 and the first and second electrodes 42 and 44 are continuously contacted with each other, thereby improving electrical connection characteristics. However, the present invention is not limited thereto. The bus bar line 42b may be omitted. In this case, the wiring material 142 may extend across the plurality of finger lines 42a in the direction crossing the finger lines 42a, 42a, but the present invention is not limited thereto.

A plurality of wiring materials 142 may be provided on the basis of one surface of each solar cell 150 to improve the electrical connection characteristics of the neighboring solar cells 150. Particularly, in this embodiment, the wiring material 142 is composed of a wire having a width smaller than that of a ribbon having a relatively wide width (for example, 1 mm to 2 mm) (For example, 2 to 5) of the number of the conventional ribbons 142 are used.

The wiring member 142 includes a core layer 142a made of metal and a solder layer 142b that is thinly coated on the surface of the core layer 142a and includes solder material to enable soldering with the electrodes 42 and 44. [ (142b). For example, the core layer 142a may include Ni, Cu, Ag, Al as a main material (for example, at least 50 wt% or more specifically at least 90 wt%). The solder layer 142b may include a material such as Pb, Sn, SnIn, SnBi, SnPb, SnPbAg, SnCuAg, or SnCu as a main material. However, the present invention is not limited thereto, and the core layer 142a and the solder layer 142b may include various materials.

As described above, when a wire having a width smaller than that of the conventional ribbon is used as the wiring material 142, the material cost can be greatly reduced. Since the width of the wiring member 142 is smaller than that of the ribbons, a sufficient number of the wiring members 142 can be provided to minimize the movement distance of the carriers, thereby improving the output of the solar cell panel 100.

Further, the wire constituting the wiring material 142 according to the present embodiment may include rounded portions. That is, the wire constituting the wiring material 142 may have a round cross section, an elliptic cross section, or a round cross section or a round cross section. Thus, the wiring material 142 can induce reflection or diffuse reflection. The light reflected from the rounded surface of the wire constituting the wiring member 142 is reflected or totally reflected on the front substrate 110 or the rear substrate 120 located on the front or rear surface of the solar cell 150, ). ≪ / RTI > Thus, the output of the solar cell panel 100 can be effectively improved. However, the present invention is not limited thereto. Therefore, the wire constituting the wiring member 142 may have a polygonal shape such as a quadrangle, or may have various other shapes.

In this embodiment, the width (or diameter) of the wiring material 142 may be 250 to 500 mu. The thickness of the solder layer 142b is very small and may have various thicknesses depending on the position of the wiring material 142. The width of the wiring material 142 may be a width of the core layer 142a, have. Alternatively, the width of the wiring material 142 can be seen as the width passing through the center of the wiring material 142 above the line portion (reference numeral 421 in FIG. 5). The current generated in the solar cell 150 by the wire-shaped wiring material 142 having such a width is efficiently supplied to the external circuit (for example, a bypass diode of a bus ribbon or a junction box) or another solar cell 150 . In this embodiment, the wiring material 142 can be individually positioned and fixed on the electrodes 42 and 44 of the solar cell 150 without being inserted into a separate layer, film, or the like. If the width of the wiring material 142 is less than 250 袖 m, the strength of the wiring material 142 may be insufficient, and the connecting area of the electrodes 42 and 44 may be very small, resulting in poor electrical connection characteristics and low adhesion. If the width of the wiring material 142 exceeds 500 袖 m, the cost of the wiring material 142 increases and the wiring material 142 hinders the incidence of light incident on the front surface of the solar cell 150, thereby increasing the shading loss . The force exerted in the direction in which the wiring member 142 is spaced apart from the electrodes 42 and 44 becomes large so that the adhesion between the wiring member 142 and the electrodes 42 and 44 may be low and the electrodes 42 and 44, It is possible to cause a problem such as cracks in the resin layer 160. In one example, the width of the wiring material 142 may be in the range of 350 to 450um (particularly, 350um to 400um). The output can be improved while increasing the adhesion with the electrodes 42 and 44 in this range.

At this time, the number of the wiring materials 142 may be 6 to 33 based on one surface of the solar cell 150. More specifically, when the width of the wiring material 142 is 250um or more and less than 300um, the number of the wiring materials 142 may be 15 to 33. [ When the width of the wiring material 142 is 300 袖 m or more and less than 350 袖 m, the number of the wiring materials 142 may be 10 to 33. When the width of the wiring material 142 is 350um or more and less than 400um, the number of the wiring materials 142 may be 8 to 33. [ When the width of the wiring material 142 is 400 탆 to 500 탆, the number of the wiring materials 142 may be 6 to 33. When the width of the wiring member 142 is 350 m or more, the output of the solar cell panel 100 is hardly increased even if the number of the wiring members 142 exceeds 15. If the number of the wiring materials 142 increases, the solar cell 150 may be burdened. In consideration of this, when the width of the wiring material 142 is 350um or more and less than 400um, the number of the wiring materials 142 may be 8 to 15. When the width of the wiring material 142 is 400 탆 to 500 탆, the number of the wiring materials 142 may be 6 to 15. At this time, in order to further improve the output of the solar cell panel 100, the number of the wiring materials 142 may be 10 or more (for example, 12 to 13). However, the present invention is not limited to this, and the number of the wiring materials 142 and the number of the bus bar lines 42b may have different values.

At this time, the pitch of the wiring material 142 (or the pitch of the bus bar line 42b) may be 4.75 mm to 26.13 mm. This takes into consideration the width and the number of the wiring materials 142. [ For example, when the width of the wiring material 142 is 250um or more and less than 300um, the pitch of the wiring material 142 may be 4.75mm to 10.45mm. When the width of the wiring material 142 is 300um or more and less than 350um, the pitch of the wiring material 142 may be 4.75mm to 15.68mm. When the width of the wiring material 142 is 350um or more and less than 400um, the pitch of the wiring material 142 may be 4.75mm to 19.59mm. When the width of the wiring material 142 is 400um to 500um, the pitch of the wiring material 142 may be 4.75mm to 26.13mm. More specifically, when the width of the wiring material 142 is 350um or more and less than 400um, the pitch of the wiring material 142 may be 10.45mm to 19.59mm. When the width of the wiring material 142 is 400 to 500 mu m, the number of the wiring materials 142 may be 10.45 mm to 26.13 mm. However, the present invention is not limited to this, and the pitch of the wiring material 142 and the pitch of the bus bar line 42b may have different values.

In this embodiment, the first electrode 42 (or the second electrode 44), the wiring material 142, the electrode region (EA in FIG. 5), and the like are arranged in the first direction And the second direction (the direction parallel to the bus bar line 42b or the wiring member 142). Thus, current flow can be stably implemented. However, the present invention is not limited thereto.

An example of the electrodes 42 and 44 of the solar cell 150 to which the wiring material 142 according to the embodiment of the present invention can be attached will be described in detail with reference to FIGS. Hereinafter, the second electrode 44 will be described in detail with reference to the first electrode 42 with reference to FIG.

5 is a partial plan view showing an enlarged view of a portion A in Fig.

Referring to FIGS. 1 to 5, in this embodiment, the first electrode 42 includes a plurality of finger lines 42a extending in a first direction (the transverse direction of the drawing) and positioned parallel to each other. And a bus bar line 42b extending in a second direction (longitudinal direction in the figure) that intersects (for example, orthogonal) with the finger line 42a and to which the wiring material 142 is connected or attached. Since the bus bar lines 42b can be arranged corresponding to the wiring materials 142, the description of the number and pitch of the wiring materials 142 can be applied as they are to the number and pitch of the bus bar lines 42b. Hereinafter, the two adjacent bus bar lines 42b in the plurality of bus bar lines 42b are referred to as electrode regions EA, respectively. Since the number of the electrode regions EA is more than one (that is, one of the number of the wiring members 142 is equal to or greater than the number of the wiring members 142) because the wiring members 142 are provided in the present embodiment on the basis of one surface of the solar cell 150 A small number).

The plurality of finger lines 42a may be spaced apart from each other with a uniform width and pitch. Although the finger lines 42a are parallel to the main edges of the solar cell 150 (particularly, the first and second edges 161 and 162) in the first direction, But is not limited thereto.

In one example, the finger line 42a of the first electrode 42 may have a width of 35 um to 120 um. The finger line 42a of the first electrode 42 may have a pitch of 1.2 mm to 2.8 mm and the number of the finger lines 42a may be 55 to 130 in a direction crossing the finger line 42a. have. These widths and pitches can be formed by easy process conditions and are limited to effectively collect current generated by photoelectric conversion while minimizing shading losses due to finger line 42a. The thickness of this finger line 42a may be in a range that can easily be formed in the process and have a desired specific resistance. However, the present invention is not limited thereto, and the width, pitch and the like of the finger line 42a may be variously changed according to changes in process conditions, the size of the solar cell 150, the material of the finger line 42a, and the like.

At this time, the width of the wiring material 142 may be smaller than the pitch of the finger lines 42a, and may be larger than the width of the finger lines 42a. However, the present invention is not limited thereto and various modifications are possible.

In one example, the bus bar line 42b may be formed continuously from the portion adjacent to the first edge 161 to the portion adjacent to the second edge 162 in the electrode region EA. As described above, the bus bar line 42b may be positioned so as to correspond to the portion where the wiring material 142 for connection with the neighboring solar cell 150 is located. These bus bar lines 42b may be provided so as to correspond one-to-one to the wiring members 142. [ Accordingly, in this embodiment, the bus bar lines 42b may be provided in the same number as that of the wiring material 142 with reference to one surface of the solar cell 150. [

The bus bar line 42b includes a line portion 421 having a relatively narrow width along the direction in which the wiring member 142 is connected in the electrode region EA and a line portion 422 having a width wider than the line portion 421 And a pad portion 422 for increasing the area of connection with the wiring material 142. It is possible to minimize the area for blocking the light incident on the solar cell 150 by the narrow width line portion 421 and to reduce the width of the wiring member 142 and the bus bar line 42b by the wide width pad portion 422. [ The adhesion force can be improved and the contact resistance can be reduced. The pad portion 422 has a width larger than that of the line portion 421 and is a region to which the wiring material 142 is substantially attached. The wiring member 142 may be attached to the line portion 421 or may be in a state where the wiring member 142 is placed on the line portion 421 without the wiring member 142 being attached to the line portion 421. [

The width of the pad portion 422 measured in the first direction may be greater than the width of the line portion 421 and the finger line 42a.

The line portion 421 of the bus bar line 42b is provided so as to correspond to the wiring material 142 in this embodiment. More specifically, a bus bar electrode having a width much larger than that of the finger line 42a is disposed corresponding to the wiring member 142. In this embodiment, the width of the bus bar line 42b The line portion 421 is located. In this embodiment, the line unit 421 may connect a plurality of finger lines 42a to provide a path through which the carrier can bypass when some finger lines 42a are disconnected.

Herein, the bus bar electrode refers to an electrode portion formed in a direction crossing the finger line to correspond to the ribbon and having a width of 12 times or more (usually 15 times or more) the width of the finger line. Since the bus bar electrode has a relatively large width, it is usually formed by two or three electrodes. The line portion 421 of the bus bar line 42b in this embodiment is formed in a direction intersecting with the finger line 42a so as to correspond to the wiring material 142, Electrode portion having a width can be referred to.

In one example, the width of the line portion 421 may be 0.5 to 10 times the width of the finger line 42a. If the ratio is less than 0.5 times, the width of the line portion 421 is reduced and the effect of the line portion 421 may not be sufficient. If the ratio exceeds 10 times, the width of the line portion 421 becomes large, and the light loss can be increased. In particular, since the wiring member 142 is provided in a large number in this embodiment, the number of the line portions 421 is also increased, and the optical loss can be further increased. More specifically, the width of the line portion 421 may be 0.5 to 7 times the width of the finger line 42a. The above ratio can be reduced to 7 times or less to further reduce the optical loss. For example, referring to the optical loss, the width of the line portion 421 may be 0.5 to 4 times the width of the finger line 42a. More specifically, the width of the line portion 421 may be 0.5 to 2 times the width of the finger line 42a. In this range, the efficiency of the solar cell 150 can be greatly improved.

Alternatively, the width of the line portion 42b may be equal to or less than the width of the wiring material 142. [ The width or area of the line member 421 contacting the line member 421 at the lower portion of the wiring member 142 is not large when the wiring member 142 has a circular shape, Or less than, the width of the < / RTI > By reducing the width of the line portion 421 in this manner, the area of the first electrode 42 can be reduced to reduce the material cost of the first electrode 42.

For example, the ratio of the width of the wiring member 142: the width of the line portion 421 may be 1: 0.07 to 1: 1. If the ratio is less than 1: 0.07, the width of the line portion 421 is too small and the electrical characteristics and the like may be deteriorated. If the ratio is more than 1: 1, the contact property with the line part 421 can not be greatly improved, but only the area of the first electrode 42 is increased, thereby increasing the optical loss and increasing the material cost. For example, in consideration of optical loss, material cost, etc., the ratio may be 1: 0.1 to 1: 0.5 (more specifically, 1: 0.1 to 1: 0.3).

Alternatively, the width of the line portion 421 may be 35 [mu] m to 350 [mu] m. If the width of the line portion 421 is less than 35 mu m, the width of the line portion 421 may be too small to reduce the electrical characteristics and the like. If the width of the line portion 421 exceeds 350 袖 m, the contact property with the line portion 421 is not greatly improved, but the area of the first electrode 42 is increased only to increase the optical loss and increase the material cost . For example, considering the light loss, material cost, and the like, the width of the line portion 421 may be 35um to 200um (more specifically, 35um to 120um).

However, the present invention is not limited thereto. Accordingly, the width of the line portion 421 can be variously modified within a range that minimizes the shading loss while efficiently transmitting the current generated by the photoelectric conversion.

The width of the pad portion 422 is greater than the width of the line portion 421 and may be equal to or larger than the width of the wiring member 142. The pad portion 422 is a portion for increasing the contact area with the wiring material 142 to improve the adhesion with the wiring material 142. The width of the pad portion 422 is set to be larger than that of the line portion 421, will be.

For example, the ratio of the width of the wiring member 142 to the width of the pad portion 422 may be 1: 1 to 1: 5. If the ratio is less than 1: 1, the width of the pad portion 422 is not sufficient and the adhesion between the pad portion 422 and the wiring material 142 may not be sufficient. If the ratio is more than 1: 5, an area where light is lost by the pad portion 422 is increased, and the shading loss may be large. The ratio may be 1: 2 to 1: 4 (more specifically, 1: 2.5 to 1: 4).

Or, as an example, the width of the pad portion 422 may be 0.25 mm to 2.5 mm. If the width of the pad portion 422 is less than 0.25 mm, the contact area between the pad portion 422 and the wiring member 142 may be insufficient because the contact area with the wiring member 142 is insufficient. If the width of the pad portion 422 exceeds 2.5 mm, the area where the light is lost by the pad portion 422 is increased and the shading loss may be large. For example, the width of the pad portion 422 may be 0.8 mm to 1.5 mm.

The length of the pad portion 422 may be greater than the width of the finger line 42a. For example, the length of the pad portion 422 may be 0.035 mm to 30 mm. If the length of the pad portion 422 is less than 0.035 mm, the contact area with the wiring material 142 is not sufficient and the adhesion between the pad portion 422 and the wiring material 142 may not be sufficient. If the length of the pad portion 422 exceeds 30 mm, the area where light is lost by the pad portion 422 is increased and the shading loss may be large.

Or, as an example, the ratio of the width of the finger line 42a to the length of the pad portion 422 may be 1: 1.1 to 1:20. The adhesion area between the pad portion 422 and the wiring material 142 can be increased by increasing the area of attachment of the pad portion 422 and the wiring material 142 within this range.

Alternatively, for example, the ratio of the width of the wiring member 142 to the length of the pad portion 422 may be 1: 1 to 1:10. If the ratio is less than 1: 1, the length of the pad portion 422 is not sufficient and the adhesion force between the pad portion 422 and the wiring material 142 may not be sufficient. If the ratio exceeds 1:10, the area where light is lost by the pad portion 422 increases and the shading loss may be large. Considering the adhesion, light loss and the like, the ratio may be 1: 3 to 1: 6.

In one bus bar line 42b, the pad portions 422 may be arranged in a number of 6 to 24 (for example, 12 to 22). The plurality of pad portions 422 may be spaced apart. For example, one finger may be placed for each of two to ten finger lines 42a. According to this, the portion where the area of the bonding of the bus bar line 42b and the wiring material 142 increases is regularly provided, so that the adhesion force between the bus bar line 42b and the wiring material 142 can be improved. Alternatively, a plurality of pad portions 422 may be disposed such that distances between the two pad portions 422 are different from each other. In particular, the pad portion 422 can be arranged at a high density at the end of the bus bar line 42b where a larger force is applied than the other portion (i.e., the central portion of the bus bar line 42b). Various other variations are possible.

In the above description, the first electrode 42 is mainly described with reference to FIG. The second electrode 44 may include a finger line and a bus bar line corresponding to the finger line 42a and the bus bar line 42b of the first electrode 42, respectively. The contents of the finger line 42a and the bus bar line 42b of the first electrode 42 can be applied to the finger line and the bus bar line of the second electrode 44 as they are. The description of the first conductivity type region 20 related to the first electrode 42 may be a description of the second conductivity type region 30 related to the second electrode 44. [ The description of the first passivation film 22 and the antireflection film 24 and the opening 102 related to the first electrode 42 is made by referring to the second passivation film 30 related to the second electrode 44, It may be a description of the opening 104.

The width, pitch, number and the like of the finger 42a of the first electrode 42 and the line portion 421 and the pad portion 442 of the bus bar line 42b are the same as the width, Pitch and number of lines and pad portions of the bus bar line. The width, pitch, number and the like of the finger line 42a of the first electrode 42 and the line portion 421 and the pad portion 422 of the bus bar line 42b are the same as the width, Line, and width, pitch, number, etc. of the line portion and the pad portion of the bus bar line. For example, the width of the electrode portion of the second electrode 44 may be larger than the width of the electrode portion of the first electrode 42 corresponding to the second electrode 44, May be smaller than the pitch of the finger line 42a of the first electrode 42 corresponding thereto. Various other variations are possible. However, the number and the pitch of the bus bar lines 42b of the first electrode 42 may be the same as the number and the pitch of the bus bar lines of the second electrode 44, respectively. Also, the first electrode 42 and the second electrode 44 may have different planar shapes. For example, the second electrode 44 may be formed entirely on the rear surface of the semiconductor substrate 160. Various variations thereof are possible.

According to the present embodiment, optical loss can be minimized by diffused reflection or the like using a wire-shaped wiring material 142, the number of wiring materials 142 can be increased, and the pitch of the wiring material 142 can be reduced, . Accordingly, the efficiency of the solar cell 150 and the output of the solar cell panel 100 can be improved. It is necessary to attach a large number of wire-like wiring materials 142 having a sectional shape such as a circular shape having a small width W1 to the solar cell 150 as described above. Accordingly, there is a demand for an apparatus for attaching a wiring material that can be attached to the solar cell 150 so as to have a high adhesive force even if it has a wire form, and can improve productivity by attaching a large number of wiring materials 142 together. The wiring material attaching apparatus and the wiring material attaching method using the same according to the present embodiment will be described in detail with reference to FIGS. 6 to 11 and 12A to 12G.

6 is a schematic view showing a part of a wiring material attaching apparatus for a solar cell panel according to an embodiment of the present invention. 7 is a schematic view showing another part of a wiring material attaching apparatus for a solar cell panel according to an embodiment of the present invention. And FIG. 8 is a conceptual diagram schematically showing a work table, a heat source, and an upper fixing member supply unit of a wiring material attaching apparatus for a solar cell panel according to an embodiment of the present invention. The upper fixing member supply unit and the solar cell supply unit are not shown in FIG. 7 for the sake of simplicity.

(Hereinafter, referred to as "wiring material adhering apparatus") 200 according to the present embodiment is configured such that a wiring material 142 wound around a wind-up roll 212 is loosened, A flux unit 220 for applying a flux to the provided wiring member 142, a drying unit 230 for drying the flux, and a wiring member 142 for fixing the wiring member 142 to the jig 243 And a mounting portion 250 for attaching the wiring material 142 to the solar cell 150. The wiring material fixing portion 240 may be formed on the wiring material fixing portion 240, This will be explained in more detail.

The winding roll 212 may have a cylindrical shape and the wiring material 142 is wound in the circumferential direction of the cylinder. The wiring material 142 wound around the winding roll 212 is unwound from the winding roll 212 and provided in the process direction. In this embodiment, a plurality of winding rolls 212 may be provided in the same manner as the number of the wiring materials 142 to be disposed on the basis of one surface of the solar cell 150. The plurality of winding rolls 212 are arranged at regular intervals in the lateral and / or longitudinal direction and the plurality of wiring materials 142 unwound from the plurality of winding rolls 212 are guided by the guide portions 214 on the same plane (Pitch) at which they are to be arranged in the vertical direction. The guide part 214 may have a variety of structures capable of moving the plurality of wiring materials 142 in a state in which they are arranged in parallel. In this embodiment, for example, a plurality of grooves (or concave portions) 214a spaced apart at regular intervals so as to correspond to the respective wiring members 142 are formed in the guide portion 214, (E.g., the x-axis in the drawing) in a fixed position (e.g., a position in the y-axis and a z-axis in the drawing) In the figure, only one guide part 214 is shown for the sake of simplicity, but a plurality of guide parts 214 may be provided in the traveling direction. The structure, shape, and the like of the guide portion 214 can be variously modified.

When the wiring members 142 are moved in parallel to each other, necessary processes are simultaneously performed on the plurality of wiring materials 142 to be attached to one surface of each solar cell 150, Thus simplifying the process. However, the present invention is not limited thereto and various modifications are possible.

As described above, the plurality of the wiring materials 142, which are unwound from the winding roll 212 and arranged in a predetermined shape, pass through the flux portion 220. In the flux portion 220, flux is applied to the outer surface of the wiring material 142. At this time, the flux can be applied to the outer surface of the wiring material 142 by various methods such as an immersion process, a spray process, and a coating process.

The flux passing through the flux portion 220 and applied to the wiring material 142 hardens as it passes through the drying portion 230 to constitute a flux layer which surrounds the outer circumferential surface of the wiring material 142. [ The drying unit 230 may have various structures for drying the flux. For example, the drying unit can dry the flux by wind, heat, or the like. The present invention is not limited to the structure, the method, and the like of the drying unit 230.

The specific structure of the flux unit 220 and the drying unit 230 is not shown for simplicity and clarity, and various structures can be applied. The flux portion 220 and the drying portion 230 may be located together inside the single body. However, the present invention is not limited thereto, and the arrangement of the flux unit 220 and the drying unit 230 may be variously modified.

The wiring material 142 having passed through the drying part 230 is fixed to the jig 243 at the wiring material fixing part 240.

The jig 243 having the first and second fixing parts 241 and 242 for fixing the plurality of wiring materials 142 on one side and the other side of the wiring material 142 is located in the wiring material fixing part 240. [ The plurality of wiring members 142 are connected to the jig 243 with a length suitable for connection between two neighboring solar cells 150 or between the solar cell 150 and a bus ribbon (reference numeral 145 in FIG. As shown in FIG.

The jig 243 includes a first fixing portion 241 which is formed in a direction intersecting the extending direction of the plurality of wiring members 142 at one side of the plurality of wiring members 142 and fixes the plurality of wiring members 142, And a second fixing portion 242 that is formed in a direction intersecting the extension direction of the plurality of wiring materials 142 at the other side of the plurality of wiring materials 142 and fixes the plurality of wiring materials 142. [ For example, the first fixing part 241 and the second fixing part 242 may each have a straight shape and be long. The first fixing portion 241 and the second fixing portion 242 are spaced apart from each other by a predetermined distance and held in a state of pulling the plurality of wiring materials 142 in the jig 243 to which the plurality of wiring materials 142 are connected. When the first fixing portion 241 and the second fixing portion 242 are held in a state of pulling the plurality of the wiring materials 142 as described above, the plurality of wiring materials 142 142 are plastically deformed so as not to be deformed any more. As described above, in this embodiment, the jig 243 includes the first and second fixing portions 241 and 242 for fixing both sides of the plurality of the wiring materials 142, so that the plurality of the wiring materials 142 are fixed And has a structure capable of maintaining a yield strength. However, the present invention is not limited thereto, and the structure of the jig 243 may be variously modified.

For example, the first fixing portion 241 located at one side (e.g., the entrance side) of the jig 243 is movable at least three axes (x-axis, y-axis, and z-axis in the figure) , The second fixing portion 242 located on the other side (e.g., the exit side) of the jig fixing portion is movable at least three axes (x-axis, y-axis, and z-axis in the figure) intersecting at right angles with each other. The first and second fastening portions 241, 242 can be moved to a desired position by a variety of known structures or methods. The cutting portion 244 may be located before the first fixing portion 241 on one side (e.g., the entrance side) of the jig 243. [

The cutout portion 244 may have various structures and schemes that allow the plurality of wiring materials 142 to move freely, to fix at a predetermined position, or to cut at a certain position. The structure of the cut portion 244 will be described in more detail with reference to FIG.

Fig. 9 is a view showing the operation of the cutout portion 244 included in the wiring material attaching apparatus 200 shown in Fig.

9, the cut portion 244 includes a first portion 2441 and a second portion 2442, and the second portion 2442 includes a first portion 2441 and a second portion 2442, (For example, the y-axis direction in the figure) perpendicular to the traveling direction of the light guide plate 142. The first portion 2441 has a plurality of first grooves R1 or R1 through which a plurality of wiring members 142 can pass and the second portion 2442 has a plurality of wiring members 142, (Or second concave portion) R2 through which a plurality of second grooves (or second concave portions) R2 can pass. Both sides of the first groove R1 of the first portion 2441 may be formed of a flat surface 2442a which is not sharp to fix the wiring material 142 without damage. A flat surface 2442a which is not sharp is provided on one side of the second groove R1 of the second portion 2442 so as to fix the wiring member 142 without damage and the wiring member 142 is cut on the other side A cutting edge 2442b may be provided. The cutting edge 2442b can cut the wiring material 142 at a position protruding in the traveling direction from the plane of the second portion 2442. [ The wiring member 142 cut by the cut portion 244 and fixed to the cut portion 244 can be fixed in a state protruding beyond the surface of the second portion 2442 of the cut portion 244. [

The second portion 2442 can relatively move in the left and right direction with respect to the first portion 2441 as described above so that the width of the overlapping portion of the first groove Rl and the second groove R2 can be freely adjusted . 9 (a), when the width of the overlapping portion of the first groove R1 and the second groove R2 is larger than the width of the wiring material 142, the wiring material 142 can move freely. 9 (b), when the width of the overlapping portion of the first groove R1 and the second groove R2 is equal to the width of the wiring member 142, the wiring member 142 contacts the first portion 2441 And the second portion 2442. The second portion 2442 may be fixed by the second portion 2442. [ 9 (c), after the cutting edge 2442b is moved across the wiring member 142, the width of the overlapping portion of the first groove R1 and the second groove R2 The wiring member 142 is cut by the cutting blade 2442b and the remaining wiring material 142 is kept fixed to the cut portion 244. [

The structure and the method of the cut portion 244 in the drawings and the detailed description have shown that a plurality of the wiring materials 142 can be guided and fixed at a certain position and can have a structure capable of performing cutting. However, the present invention is not limited thereto. The cut portion 244 may have various structures that can cut the wiring material 142 so that the wiring material 142 has a predetermined length before or after the plurality of wiring materials 142 are fixed to the jig 243, Method, and the like.

The first fixing part 241 may have a variety of structures and systems capable of fixing or moving the plurality of wiring materials 142 at a predetermined position. For example, the first fixing portion 241 can clamp the wiring material 142 so that the plurality of wiring materials 142 can be fitted and fixed.

For example, in this embodiment, the first fixed portion 241 includes a first portion 2411 and a second portion 2412, and the second portion 2412 includes a first portion 2411 and a second portion 2412, (For example, the y-axis direction in the figure) perpendicular to the traveling direction of the light guide plate 142. The first portion 2411 is located on one side of the wiring material 142 corresponding to each wiring material 142 and contacts one side of the wiring material 142 and extends toward the second portion 2412 along the longitudinal direction of the wiring material 142 And the second portion 2412 is located on the other side of the wiring material 142 corresponding to the wiring material 142 and contacts the other side of the wiring material 142, 142 extending in the direction toward the first portion 2411 along the longitudinal direction of the first clamp portion PB. Thus, the wiring member 142 is clamped in the longitudinal direction between the first clamping unit PA and the second clamping unit PB and can be stably fixed.

The first portion 2411 includes a first protruding portion P11 protruding downward from the other side of the wiring member 142 and a second protruding portion P11 extending from the first protruding portion P11 to the length of the first portion 2411. [ A first fixing portion P1 including a second portion P12 protruding in the direction of the first portion P12 and extending to one side of the wiring member 142 and a third protruding portion P13 protruding downward from the second portion P12, . ≪ / RTI > At this time, the first clamping portion PA may be positioned on the third protruding portion P13. Similarly, the second portion 2412 includes a first protruding portion P21 protruding downward from one side of the wiring member 142 and a second protruding portion P21 extending from the first protruding portion P21 in the longitudinal direction of the second portion 2412 The second fixing portion P2 including the second portion P22 protruding from the second portion P22 to the other side of the wiring member 142 and the third protruding portion P23 protruding downward from the second portion P22, . At this time, it is exemplified that the second clamp portion PB is located at the third protruding portion P23. With this structure, the wiring material 142 can be stably clamped.

The second portion 2412 is positioned between the first clamp portion PA and the second clamp portion PB with respect to the first portion 2411 in a state where the wiring member 142 is positioned between the first clamp portion PA and the second clamp portion PB. When the first clamp part PA and the second clamp part PB are brought into close contact with both sides of the wiring material 142 by moving the clamp part PB to narrow the space between the first clamp part PA and the second clamp part PB, The wiring material 142 can be stably fixed between the first and second terminals PB. Conversely, the second part 2412 is moved with respect to the first part 2421 such that the first clamp part PA and the second clamp part PB are separated from each other, and the first clamp part PA and the second clamp part The wiring member 142 can be stably separated or released from the first clamping unit PA and the second clamping unit PB when the distance between the wiring member 142 and the wiring board 142 is larger than the width of the wiring member 142. [

Similarly, the second fixing portion 242 includes a first clamp portion PA and a first fixing portion P1 (i.e., first to third protruding portions P11, P12, P13) And a second portion 2422 having a first clamp portion 2421 and a second clamp portion PB and a second fixing portion P2 (first to third projecting portions P21, P22, P23). The details of the first fixing part 241 can be applied as they are, and thus their detailed description will be omitted.

In the present embodiment, the first and second portions 2411 and 2412 (2421 and 2422) including the clamp portions PA and PB are relatively moved to clamp the wiring member 142. However, But is not limited thereto. That is, various other structures can be applied to the structures of the clamp portions PA and PB, the structures of the first and second fixing portions P1 and P2, and the structures of the first and second fixing portions 241 and 242 have.

And a fixing member 246 capable of fixing the wiring material 142 at the time of cutting before the cut portion 244. [ For example, in this embodiment, the fixing member 246 corresponds to each of the wiring members 142 in a one-to-one correspondence, and the wiring member 142 is pressed and fixed when the wiring member 142 is fixed without moving. A plurality of such fixing members 246 may be provided at regular intervals between each other. Then, when the wiring member 142 is moved, fixed, cut, or fixed to the jig 243, the driving of the plurality of fixing members 246 can be controlled to stably move or fix the wiring member 142 . In the figure, two fixing members 246 are provided to minimize the number of the wiring members 142, while stably performing the movement or fixing of the wiring members 142. [ However, the present invention is not limited thereto, and various structures can be applied to the structure of the fixing member 246, and the number of the fixing members 246 is not limited.

The jig 243 (that is, the jig-wiring material combination body) to which the plurality of wiring materials 142 are fixed moves to the attachment portion 250. For example, the first and second fixing portions 241 and 242 can be driven in various directions (e.g., the x-axis direction, the y-axis direction, and the z-axis direction in the drawing) while maintaining a constant distance. Therefore, the plurality of wiring members 142 are fixed to the jig 243 and moved to the fixing portion 250 in a fixed state so that the wiring members 142 are not undesirably deformed.

Various structures known to be capable of moving the first and second fixing portions 241 and 242 to a desired position can be applied. Also, the first and second fixing portions 241 and 242 may be configured to fix the wiring member 142 in various structures.

7, the attaching portion 250 may heat the wiring member 142 to the solar cell 150 by applying heat by the heat source unit 258 while the wiring member 142 and the solar cell 150 are pressed and fixed, . In this embodiment, the jig 243 is separated from the wiring material 142 after the wiring material 142 and the solar cell 150 are fixed, and the wiring material 142 and the solar cell (not shown) 150 to pass through the heat source unit 258.

In this embodiment, the jig 243 is removed in a state that the wiring material 142 and the solar cell 150 are pressed against each other by using the exhaust adsorption. That is, the wiring member 142 and the solar cell 150 are sucked and fixed by the exhaust without the jig 243, and pass through the heat source unit 258 in a fixed state. Thus, the wiring material 142 and the solar cell 150 can be stably fixed by a simple method. The jig 243 can be returned to the wiring material fixing portion 240 after the plurality of wiring materials 142 are transferred to the fixing portion 250 so that the number of the jigs 243 operated in the wiring material attachment device 200 is very high little. If the number of jigs 243 operated in this manner is reduced, the productivity can be greatly improved.

An exhaust device (or a vacuum device) 259 for exhausting gas for exhaust adsorption may be provided. As the exhaust device 259, a pump, a compressor, and the like may be used, and devices having various structures, methods, and shapes may be used. 7, the exhaust device 259 is conceptually illustrated at the lower right portion of the attachment portion 250 of FIG. 7. However, the exhaust device 259 is not located inside the attachment portion 250, 250 may be connected to the < / RTI >

At this time, the exhaust adsorption can be easily performed, and the workbench can be constituted by the conveyor belt 252 so that the wiring material 142 and the solar cell 150 can be easily moved to the heat source unit 258. In this embodiment, a plurality of conveyor belts 252 may be provided so as to be spaced apart from each other. As a result, the wiring member 142 and the solar cell 150 can be easily pressed together by being exhausted even through the conveyor belt 252. And the conveyor belt 252 has a narrow width and can be driven more easily.

Each conveyor belt 252 may further include an exhaust hole 252a. Accordingly, the exhaust device 259 is exhausted through the exhaust hole 252a, so that the solar cell 150 and the wiring material 142 can be effectively compressed. The exhaust device 259 may have a structure capable of exhausting the gas through the exhaust hole 252a.

For example, each conveyor belt 252 is provided with a plurality of wiring holes 142 at a predetermined distance in the longitudinal direction of the conveyor belt 252, . The wiring material 142 and the solar cell 150 can be effectively squeezed by the exhaust made between two adjacent conveyor belts 252 and the exhaust made by the exhaust hole 252a of each conveyor belt 252. [ Thus, the fixing stability of the wiring material 142 and the solar cell 150 can be improved.

At this time, when one side (the conveyor belt 252) of the conveyor belt 252 is moved so as to prevent the position of the wiring material 142 and the solar cell 150 from being shifted when the wiring material 142 and the solar cell 150 are fixed using the exhaust adsorption, The third fixing portion 254 may be located before the portion where the first fixing portion 254 starts. The third fixing portion 254 is kept fixed with the conveyor belt 252 at a predetermined position.

The third fixing portion 254 may have various structures and systems that can fix or move the plurality of wiring materials 142 at a predetermined position. For example, in this embodiment, the third fixed portion 254 includes a first portion 2541 and a second portion 2542, and the second portion 2542 includes a first portion 2541 and a second portion 2542, (For example, the y-axis direction in the figure) perpendicular to the extending direction of the light guide plate 142.

The first part 2541 includes a first clamp part PA formed in the longitudinal direction of the wiring material 142 and adapted to come into close contact with and contact with one side of the wiring material 142 and is formed in the longitudinal direction of the wiring material 142 And a second clamp portion PB to be brought into close contact with and contact with the other side of the wiring material 142. [ The first portion 2541 includes a first protruding portion P11 protruding upward from the other side of the wiring member 142 and a second protruding portion P11 protruding from the first protruding portion P11 in the longitudinal direction of the first portion 2541 A first fixing portion P1 including a second portion P12 extending to one side of the wiring member 142 and a third protruding portion P13 protruding upward from the second portion P12 have. At this time, the first clamping portion PA may be positioned on the third protruding portion P13. Similarly, the second portion 2542 includes a first protruding portion P21 protruding upward from one side of the wiring member 142 and a second protruding portion P21 extending from the first protruding portion P21 toward the longitudinal direction of the second portion 2542 The second fixing portion P2 including the second portion P22 protruding from the second portion P22 to the other side of the wiring member 142 and the third protruding portion P23 protruding upward from the second portion P22, . At this time, it is exemplified that the second clamp portion PB is located at the third protruding portion P23. With this structure, the wiring material 142 can be stably clamped.

The first clamping unit PA and the first clamping unit P1 and the second clamping unit PB and the second clamping unit P2 are disposed at the upper side as opposed to the first or second clamping members 241 and 242, The wiring member 142 can be stably fixed without interference with the first fixing portion 241. [ The first clamping unit PA and the first clamping unit P1 and the second clamping unit PB and the second clamping unit P2 protrude upward instead of the bottom, Since the first clamping unit PA and the first clamping unit P1 and the second clamping unit PB and the second clamping unit P2 of the first clamping unit 241 and the second clamping unit 242 are the same, .

Although the first and second portions 2541 and 2542 including the clamp portions PA and PB relatively move to clamp the wiring member 142 in the present embodiment, the present invention is not limited thereto. That is, various other structures can be applied to the structures of the clamp portions PA and PB, the structures of the first and second fixing portions P1 and P2, and the structures of the first and second fixing portions 241 and 242 have.

The upper part of the conveyor belt 252 may be provided with a solar cell supply unit (reference numeral 251 in FIG. 11, hereinafter the same) for supplying the solar cell 150. The solar cell supply unit 251 is not connected to the work station 252, the heat source unit 258 and the upper stationary member supply unit 2560 but is driven by an independent driving unit to provide the solar cell 150 to the work station 252 can do. Various structures and systems known as the solar cell supply unit 251 can be applied.

An upper fixing member supply unit 2560 may be disposed on the conveyor belt 252 to provide an upper fixing member 256 for fixing the wiring material 142 on the upper portion of the solar cell 150.

8, the upper fixing member 256 supplied from the upper fixing member supply part 2560 fixes the wiring material 142 on the upper part of the solar cell 150 before being put into the heat source part 258. [ The upper fixing member 256 passes through the heat source unit 258 together with the wiring member 142 fixed on the upper part of the solar cell 150. The solar cell 150 and the wiring material 142 are attached to each other while 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 may be returned to the upper fixing member supply unit 2560 after passing through the heat source unit 258. [ At this time, the upper fixing member supply unit 2560 is not connected to the work table 252, the heat source unit 258, and the like, but is driven by an independent driving unit to mount the upper fixing member 256 on the solar cell 150 and the wiring member 142 Can serve as a provider

The upper fixing member supply part 2560 is extended from the previous heat source part 258 to a position after the heat source part 258 and is positioned in a state where the solar cell 150 and the wiring material 142 are positioned before the heat source part 258. [ The upper fixing member 258 can be easily supplied to the upper fixing member 258 and the upper fixing member 258 passed through the heat source 258 can be easily collected after the heat source 258. [ However, the present invention is not limited thereto.

The upper fixing member supply unit 2560 includes a plurality of upper fixing members 256 so that even when one upper fixing member 256 is passing through the heat source unit 258, The solar cell 150 and the wiring material 142 can be fixed. Thus, the process of attaching a plurality of solar cells 150 can be performed continuously.

The upper fixing member 256 includes frame portions 2562 and 2566 and a plurality of fixing portions 2564 fixed to the frame portions 2562 and 2566 to fix the plurality of wiring materials 142 . The upper fixing member 256 will be described in detail with reference to FIG.

10 is a perspective view showing a state in which the solar cell 150 and the wiring material 142 located on the top of the solar cell 150 are fixed by using the upper fixing member 256 included in the wiring material attaching apparatus 200 shown in Fig.

Referring to FIGS. 7 and 10, the frame portions 2562 and 2566 may have various shapes in which a plurality of fixing portions 2564 can be fixed. For example, the frame portions 2562 and 2566 include a plurality of first portions 2562 arranged in a direction intersecting the extending direction of the wiring material 152, and a plurality of first portions 2562 connecting the both sides of the plurality of first portions 2562 And a second portion 2566. Thereby, the plurality of fixing portions 2564 can be stably fixed while simplifying the structure.

The fixing portion 2564 may be positioned corresponding to the portion of the first portion 2562 where the wiring material 142 is located. The plurality of fixing portions 2564 can be fixed to the plurality of first portions 2562, respectively, so that one wiring material 142 can be fixed.

The fixing portion 2564 may have various structures capable of pressing and fixing the wiring material 142. [ More specifically, the fixing portion 2564 can be made of an elastic member. For example, the fixing portion 2564 may have an inclined bent portion. Then, when the wiring material 142 is positioned under the bent portion of the fixing portion 2564, the wiring material 142 can be pressed and pressed by the elasticity applied to the bent portion of the fixing portion 2564. However, the present invention is not limited thereto, and various modifications can be made to the structure and the manner of the upper fixing member 256.

And the heat source unit 258 provides heat to the solar cell 150 at the upper portion or the lower portion of the conveyor belt 252. The coating layer 142b of the wiring material 142 is melted and soldered by the heat provided by the heat source unit 258 so that the wiring material 14 contacts the electrodes 42 and 44 of the solar cell 150 ). ≪ / RTI > In this embodiment, the heat source unit 258 directly applies heat, thereby reducing the time of the attaching step and improving the attachment characteristics. For example, the heat source unit 258 may be an infrared lamp. However, the present invention is not limited thereto, and the heat source unit 258 may be applied to various structures and systems capable of providing heat.

11 is a block diagram schematically showing a wiring material attaching apparatus 200 according to an embodiment of the present invention.

Referring to FIG. 11 together with FIGS. 6 to 8, a wiring material 142 provided from the wiring material supplying portion 210 is provided to the wiring material fixing portion 240 after passing through the flux portion 220 and the drying portion 230. Only the wiring material 142 is fixed to the jig 243 in the wiring material fixing part 240 separately from the solar cell 150 to form the wiring material-jig combined body.

The thus formed wiring-jig combination is provided in the workbench 252. A solar cell 150 is provided on the work table 252 from a solar cell supply unit 251. At this time, the solar cell 150 and the wiring material 142 located under the solar cell 150 are fixed on the work table 252 by adsorption, and the solar cell 150 and the wiring material 142 located on the solar cell 150 are located thereon And is fixed by the upper fixing member 256. When the solar cell 150 and the wiring material 142 are fixed by the work table 252 or the upper fixing member 256, the jig 243 fixing the wiring material 142 is separated from the wiring material 142, And is returned to the server 240. The work table 252 serves to transfer the wiring material 142 and the solar cell 150 and also fixes the solar cell 150 arranged in a predetermined position and the wiring material 142 located under the solar cell 150 in this state It plays a role.

The solar cell 150 and the wiring member 142 together with the solar cell 150, the wiring material 142 and the upper fixing member 256 pass through the heat source unit 258 to form a solar cell string, The upper fixing member 256 having passed through the portion 258 is separated from the solar cell 150 and the wiring member 142 and is transported to the upper fixing member supply portion 2560.

The operation of the wiring material attaching apparatus 200 and the wiring material attaching method according to the present embodiment will be described in more detail with reference to Figs. 6 to 11 and Figs. 12A to 12G.

12A to 12G are views for explaining the operation of the attaching portion 250 of the wiring material attaching apparatus 200 shown in Fig.

A plurality of wiring portions 142 (more specifically, a first wiring portion 1420a) arranged in a state of being spaced apart on the same plane by the wiring material supplying portion 210 are connected to the flux portion 220 and the drying portion 230 / RTI > Thus, the flux layer is formed on the outer surface of the first wiring material 1420a, so that the attachment characteristics of the first wiring material 1421 can be improved. For the sake of clarity, in the present description, a wiring material 142 positioned and attached only to the lower portion of the first solar cell 151 is referred to as a first wiring material 1421, and a first solar cell 151 and a second solar cell 152 are referred to as a second wiring material 1422. [ However, the terms of the first wiring material 1421 and the second wiring material 142 are used only for distinguishing each other, but the present invention is not limited thereto.

The first wiring material 1421 fixed to the cut portion 244 and the fixing member 246 is located at a more protruded position than the flat surface of the second portion 2442 of the cut portion 244. [ In this state, the second fixing portion 242 moves in a direction opposite to the advancing direction (negative x-axis direction in the figure) and moves to the portion where the first wiring material 1421 projected from the cut portion 244 is located. At this time, the first fixing portion 241 moves to the upper or lower portion and is positioned at a position where the second fixing portion 242 does not interfere with reaching the first wiring material 1421 protruded from the cut portion 244 . And the second portion 2422 of the second fixing portion 242 moves in the lateral direction (y-axis direction) to adjust the distance between the clamp portions PA and PB, And the first wiring material 1421 is fixed to the second fixing portion 242.

Subsequently, the fixing member 246 is moved to a position where the first wiring material 1421 is not fixed, and the cut portion 244 is brought into the releasing state in which the first wiring material 1421 is not fixed as shown in Fig. 9 (a) So that the first wiring material 1421 can move freely without being fixed to the cut portion 244. [

Next, the second fixing portion 242 moves in the advancing direction (positive x-axis direction in the figure) by the desired length of the first wiring material 1421 and the first fixing portion 241 can fix the wiring material 142 And fixes one side of the wiring material 142 at a portion adjacent to the cut portion 244. [ The fixing member 246 also presses the first wiring material 1421 to fix the position of the wiring material 142. [

In this state, the cutout portion 244 operates as shown in FIG. 9C and cuts the plurality of first wiring materials 1421 together. Thus, a plurality of first wiring materials 1421 cut to a desired length are fixed to the jig 243 to form a first jig-wiring material combination body. At this time, the plurality of first wiring materials 1421 fixed between the first fixing portion 241 and the second fixing portion 242 are subjected to a tensile force in the longitudinal direction and are plastically deformed, plastically deformed, So that the first fixing part 241 and the second fixing part 242 are not deformed any more and remain in that state. As a result, the plurality of first wiring materials 1421 fixed to the jig 243 are maintained in a state in which they are no longer deformed even if the jig 243 moves.

Next, as shown in Figs. 12A and 12B, a jig 243 to which a plurality of first wiring materials 1421 are fixed is placed on a workbench, and a plurality of first wiring materials 1421 and a first solar cell 151 Fixed.

More specifically, as shown in Fig. 12A, the jig 243 (i.e., the first wiring material-jig combined body) having the wiring material 142 fixed on the conveyor belt 252 is placed. The third fixing portion 254 located at one side of the conveyor belt 252 in this state is fixed to the first fixing portion 241 side between the first fixing portion 241 and the second fixing portion 242, Is fastened to the first wiring material 1421 so as to hold and fix the wiring material 1421 and the first fixing portion 241 is released from the first wiring material 1421. [ At this time, the length of the first wiring material 1421 is slightly longer than the length of the first solar cell 151 and the length of the second solar cell 152, The second length may be such that the first length can be connected to the reference numeral 145). When the third fixing part 254 fixes one side of the plurality of first wiring materials 1421, the plurality of first wiring materials 1421 are fixed to the work fixing part at a predetermined positional relationship with the work table, (254) so that it can be stably fixed to the work table.

12B, the first solar cell 151 is placed on the conveyor belt 252 and the plurality of wiring members 1421, and is exhausted by using the exhaust device 259. Then, as shown in Fig. Then, the first solar cell 151 is pressed and fixed on the plurality of first wiring materials 1421. The first portion 241 is located at a position where the first solar cell 151 is prevented from being attracted to the work table 252 on the first wiring material 1421 The length of the first wiring material 1421 has a first length that is longer than the length of the first solar cell 151 so that the second portion 242 is connected to the first solar cell 151. [ The first solar cell 151 does not interfere with the first solar cell 151 being attracted to and fixed to the work table 252 even when the first solar cell 151 is fastened to the first wiring material 1421. [

Then, as shown in Fig. 12C, the second fixing portion 242 is released to separate the jig 243 from the plurality of first wiring materials 1421. Next, as shown in Fig. At this time, the third fixing part 254 is released together, and a plurality of first wiring materials 1421 fixed to each other and the first solar cell 151 can move by the movement of the conveyor belt 252. The conveyor belt 252, the wiring material 142, and the first solar cell 151 are stably fixed by exhaust adsorption even if the third fixing part 254 and the second fixing part 242 are released. The jig 243 is completely separated and released from the wiring material 142 and the jig 243 returns to the wiring material fixing portion 240. [

Then, as shown in Fig. 12D, the first solar cell 151 and the wiring material 142 attached to the lower surface thereof are moved by the conveyor belt 252 in the traveling direction.

12E and 12F, another wiring material 142 (i.e., a plurality of second wiring materials 1422) is placed on the first solar cell 151, and the first solar cell 151, A plurality of second wiring materials 1422 are fixed on the second wiring materials 1422 and the second solar cells 152 are fixed on another part of the plurality of second wiring materials 1422. [

12E, a jig 243 to which a plurality of second wiring materials 1422 are fixed is passed from the third fixing part 254 to the first solar cell 151 located on the conveyor belt 252, (I.e., the second wiring material-jig combined body). The second wiring-jig combination may be formed in the same manner as the method for forming the first wiring-jig combination at the wiring-material-fixing part 240. [ The length of the second wiring material 1422 is longer than that of the first and second solar cells 151 and 152 so as to connect the two solar cells (i.e., the first and second solar cells 151 and 152) 2 < / RTI > length.

The third fixing portion 254 located at one side of the conveyor belt 252 is held by the second wiring material 1422 so as to hold and fix the second wiring material 1422 fixed to the first fixing portion 241 side of the jig 243. [ 1422, and the first fixing portion 241 is released from the second wiring material 1422. [

12F, when the second solar cell 152 is placed on another part of the second wiring material 1422 located on the conveyor belt 252, a plurality of second wiring materials 1422 are formed by the exhaust gas adsorption, And is fixed to the solar cell 152. The upper fixing member 256 is placed on the second wiring member 1422 located on the first solar cell 151 so that the plurality of fixing members 254 are connected to the plurality of second wiring members 1422, To fix it.

Next, as shown in Fig. 12G, the second fixing portion 242 is released to separate the jig 243 from the plurality of second wiring materials 1422. Next, as shown in Fig. At this time, the third fixing part 254 is released together, and a plurality of the second wiring materials 1422 fixed to each other and the second solar cell 152 can move by the movement of the conveyor belt 252. The conveyor belt 252, the wiring material 142, and the first and second solar cells 151 and 152 are stably fixed by the exhaust adsorption even if the third fixing part 254 and the second fixing part 242 are released. . The jig 243 is completely separated and released from the wiring material 142 and the jig 243 returns to the wiring material fixing portion 240. [

When the solar cell 150 passes through the heat source unit 258 in a state where the wiring material 142 is attached to both the top and bottom surfaces of the solar cell 150, the flux of the wiring material 142 and the coating layer 142b are melted Is attached to the first or second electrode (42, 44) of the solar cell (150). More specifically, a plurality of first wiring materials 1421 are disposed on one surface of the first solar cell 151, and a plurality of second wiring materials 1422 are disposed on the other surface of the first solar cell 151, A plurality of first wiring materials 1421 and a plurality of second wiring materials 1422 can be attached to both surfaces of the first solar cell 151 by applying heat to the first solar cell 151. [

Another solar cell (for example, a third solar cell) is placed on another part of another plurality of wiring materials 142 while a part of another plurality of wiring materials 142 is placed on a part of the second solar cell 152, A plurality of wiring members 142 can be attached to the second solar cell 152 by placing heat on the second solar cell 152 in which a plurality of wiring materials 142 are located on both sides. This operation can be repeated to form a solar cell string constituting one column. In the last solar cell 150 constituting the solar cell string, a plurality of wiring materials 142 having a first length are heated in a state where they are fixed by the upper fixing member 256 while being positioned on the last solar cell 150 A plurality of wiring materials 142 can be attached.

According to this embodiment, since the jig 243 is separated from the plurality of wiring materials 142 before passing through the heat source unit 258, the number of the operating jigs 243 can be minimized. Thus, the structure of the wiring material attaching apparatus 200 can be simplified and the productivity can be improved. At this time, if the plurality of wiring materials 142 and the solar cell 150 are fixed by exhaust absorption, the plurality of wiring materials 142 and the solar cell 150 can be stably fixed without damaging them. Since the plurality of wiring materials 142 cut by the cut-out portion 244 are fixed to the solar cell 150, the structure and manufacturing process can be simplified. It is also possible to automate the attachment of the plurality of wiring materials 142 by passing the plurality of wiring materials 142 on both sides of the solar cell 150 through the heat source unit 258 through the conveyor belt 252 . Thus, the wiring material 142 including the rounded portion and including the coating layer 142b for soldering can be attached to the solar cell 150 by an automated system.

In the drawings and the foregoing description, for simplicity and clarity, only essential components of the wiring material attaching apparatus 200 according to the present embodiment have been shown and described. The cutting portion 244, the fixing member 246, the first fixing portion 241, the second fixing portion 242, the third fixing portion 243, the upper fixing member 256, etc., (E.g., a motor) and a portion connected thereto (e.g., an arm, a link, and the like) so as to be able to be changed. And a controller for operating the driving member wirelessly or by wire. Thus, the wiring material attaching apparatus 200 can be operated as desired. Various methods or structures known to the driving member, the connecting portion and the controller described above can be applied.

Features, structures, effects and the like according to the above-described embodiments are included in at least one embodiment of the present invention, and the present invention is not limited to only one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified in other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

100: Solar panel
142: wiring material
150: Solar cell
200: Wiring material attachment device
210:
220: Flux part
230: Drying section
240: Wiring material fixing portion
250:

Claims (20)

Forming a first wiring-jig combined body by fixing a plurality of first wiring materials to a jig;
Placing the first wiring-jig combination on a workbench;
Fixing the plurality of first wiring materials and the first solar cell;
Separating the jig from the plurality of first wiring materials; And
Attaching the plurality of first wiring materials to the first solar cell by applying heat to the plurality of first wiring materials fixed to each other and the first solar cell
Lt; / RTI >
Wherein the separating is performed after the first wiring material is disposed in the first solar cell,
Wherein the jig includes a first fixing portion and a second fixing portion that are spaced apart from each other by a predetermined distance to fix the first wiring material. The method according to claim 1,
Wherein the plurality of first wiring materials and the first solar cell are fixed to each other by adsorption by exhaust in the fixing step. The method according to claim 1,
Wherein the work table includes a conveyor belt having an exhaust hole. The method according to claim 1,
Wherein the jig includes a first fixing portion for fixing one side of the plurality of first wiring materials and a second fixing portion for fixing the other side of the plurality of first wiring materials,
And a third fixing part for fixing one side of the plurality of first wiring materials to one side of the work table,
The first fixing portion is released and the first solar cell is laid on the plurality of first wiring members in a state where the third fixing portion is fastened to one side of the plurality of first wiring materials in the fixing step, And,
And the second fixing portion is released in the separating step. The method according to claim 1,
Wherein the plurality of first wiring materials are fixed to and cut from the jig in the step of forming the first wiring material-jig combination body. The method according to claim 1,
Between the separating step and the attaching step,
Fixing the plurality of second wiring materials to the second jig to form a second wiring-jig combined body;
Placing the plurality of second wiring materials on the work table and the first solar cell;
Fixing a part of the plurality of second wiring materials on the first solar cell and fixing a second solar cell on another part of the plurality of second wiring materials; And
Separating the second jig from the plurality of second wiring materials
The method comprising the steps of: The method according to claim 6,
Wherein the plurality of first wiring materials are located on one surface of the first solar cell and the plurality of second wiring materials apply heat to the first solar cell located on the other surface of the first solar cell, And attaching the plurality of first wiring materials and the plurality of second wiring materials to both sides of the solar cell. The method according to claim 6,
Wherein the plurality of second wiring materials are fixed by an upper fixing member pressing them onto the first solar cell. The method according to claim 1,
Wherein the first wiring material includes a rounded portion and has a coating layer for soldering on an outer surface thereof. A wiring material fixing section for fixing a plurality of wiring materials to a jig to form a wiring-jig combination;
A work table on which the wiring material-jig combination body is placed to fix the plurality of wiring materials and the solar cell; And
And a heat source unit for applying heat to the plurality of wiring materials fixed to each other and the solar cell,
Lt; / RTI >
Wherein the jig is separated from the plurality of wiring materials before the plurality of wiring materials and the solar cell are fixed and passed through the heat source portion,
Wherein the jig includes a first fixing portion and a second fixing portion spaced apart from each other by a predetermined distance to fix the wiring material. 11. The method of claim 10,
Further comprising an exhausting device for exhausting the plurality of wiring materials and the solar cell so as to be fixed by exhaust adsorption. 11. The method of claim 10,
Wherein the work table includes a conveyor belt having an exhaust hole. 13. The method of claim 12,
A plurality of conveyor belts are provided so as to be positioned side by side with each other being spaced apart from each other,
And the plurality of exhaust holes are provided on the conveyor belt. 14. The method of claim 13,
Wherein each of the wiring members is disposed on each side edge of the conveyor belt and the exhaust hole is provided in a central portion of the conveyor belt. 11. The method of claim 10,
Wherein the jig includes a first fixing portion for fixing one side of the plurality of wiring materials and a second fixing portion for fixing the other side of the plurality of wiring materials,
Further comprising a third fastening portion located on one side of the worktable,
When the wiring-jig combined body is placed on the workbench, the third fixing part is fastened to one side of the plurality of wiring materials adjacent to the first fixing part between the first fixing part and the second fixing part, The first fixing portion is released and the solar cell is placed on the plurality of wiring materials and fixed by exhaust adsorption and the second fixing portion is released to separate the jig from the plurality of wiring materials. Device. 11. The method of claim 10,
Further comprising a cutting portion for cutting the plurality of wiring materials fixed to the jig. 11. The method of claim 10,
And an upper fixing member for fixing another plurality of wiring materials located on the solar cell to the solar cell. 18. The method of claim 17,
And the upper fixing member comprises an elastic member for pressing and fixing the another plurality of wiring members. 18. The method of claim 17,
Wherein the wiring material includes a rounded portion and has a coating layer for soldering on an outer surface thereof. 11. The method of claim 10,
Wherein the jig includes a first fixing portion extending from one side of the plurality of wiring materials and extending in a direction intersecting the extending direction of the plurality of wiring materials to fix the plurality of wiring materials and a second fixing portion extending from the other side of the plurality of wiring materials And a second fixing portion extending in a direction intersecting the extending direction and fixing the plurality of wiring materials.

Images