KR101066851B1 - Photovoltaic module comprising a corner key - Google Patents

Abstract

The photovoltaic module of the present invention includes a photovoltaic device for converting light into electricity, a frame having an insertion groove and a fastening hole into which a side surface of the photovoltaic device is inserted, and an insertion portion inserted into the fastening hole and an end of the frame. A locking jaw portion is formed to include a corner key for fastening the adjacent frames.

Photovoltaic, Corner Keys, Frames

Description

Photovoltaic Module with Corner Keys {PHOTOVOLTAIC MODULE COMPRISING A CORNER KEY}

The present invention relates to a photovoltaic module comprising a corner key.

With the recent depletion of existing energy sources such as oil and coal, interest in alternative energy sources to replace them is increasing. Among them, solar energy is particularly attracting attention because it is rich in energy resources and has no problems with environmental pollution.

The photovoltaic module is a device that converts solar energy directly into electrical energy. Photovoltaic modules mainly use the photovoltaic phenomenon of semiconductor junctions. That is, when light is incident on and absorbed by a semiconductor junction doped with p-type and n-type impurities, light energy generates electrons and holes in the semiconductor, and photovoltaic power is generated across the semiconductor junction by separating them by an internal electric field. . At this time, if the electrode is formed at both ends of the junction and the conductor is connected, current flows to the outside through the electrode and the conductor.

Such a photovoltaic module includes a frame for protecting the photovoltaic cell and installing the photovoltaic module. When the photovoltaic module is installed, the frame of the photovoltaic module should be firmly tightened since it should be operated for about 20 years.

The present invention is to provide a photovoltaic module that can secure the fastening of the frame.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

The photovoltaic module of the present invention includes a photovoltaic device for converting light into electricity, a frame having an insertion groove and a fastening hole into which a side surface of the photovoltaic device is inserted, and an insertion portion inserted into the fastening hole and an end of the frame. A locking jaw portion is formed to include a corner key for fastening the adjacent frames.

The photovoltaic module of the present invention includes a corner key, a part of which is exposed to the outside of the frame, thereby stably fastening the frame.

Next, a photovoltaic module according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1A to 1H illustrate a method of manufacturing a photovoltaic module according to an embodiment of the present invention.

As shown in FIG. 1A, a substrate 100 is prepared first. The substrate 100 may be a light transmissive insulating substrate such as glass or a non-translucent substrate such as stainless steel.

As shown in FIG. 1B, the first electrode 210 is formed on the substrate 100. In an embodiment of the present invention, the first electrode 210 may be formed by a chemical vapor deposition (CVD) method, and a transparent conductive oxide (TCO) such as tin oxide (SnO ₂ ) or zinc oxide (ZnO). It may be made of, or may be made of an opaque conductive material such as silver.

As shown in FIG. 1C, the laser is irradiated to the first electrode 210 side or the substrate 100 side to scribe the first electrode 210. As a result, a first separation groove 220 is formed in the first electrode 210. That is, since the first separation groove 220 penetrates the first electrode 210, a short circuit between adjacent first electrodes 210 is prevented.

As illustrated in FIG. 1D, the photoelectric conversion layer 230 is stacked by CVD to cover the first electrode 210 and the first separation groove 220. In this case, the photoelectric conversion layer 230 may be stacked in order of the p-type semiconductor layer, the intrinsic semiconductor layer, and the n-type semiconductor layer. In order to form a p-type semiconductor layer, when a source gas such as monosilane (SiH 4) and hydrogen and a doping gas containing a Group 3 element such as B ₂ H ₆ are mixed in the reaction chamber, the p-type semiconductor layer is hydrogenated according to the CVD method. This is laminated. Then, when only the source gas flows into the reaction chamber, a hydrogenated intrinsic semiconductor layer is formed on the hydrogenated p-type semiconductor layer by CVD. Finally, when a doping gas containing a Group 5 element such as PH ₃ and a source gas are mixed, the n-type semiconductor layer hydrogenated by the CVD method is stacked on the intrinsic semiconductor layer. Accordingly, a pin type photoelectric conversion layer 230 including a hydrogenated p-type semiconductor layer, a hydrogenated intrinsic semiconductor layer, and a hydrogenated n-type semiconductor layer sequentially stacked on the first electrode 210 may be positioned.

In addition, an n-i-p type photoelectric conversion layer 230 including a hydrogenated n-type semiconductor layer, a hydrogenated intrinsic semiconductor layer, and a hydrogenated p-type semiconductor layer sequentially stacked on the first electrode 210 may be located.

As shown in FIG. 1E, the laser is irradiated to the substrate 100 side or the photoelectric conversion layer 230 in the air to scribe the photoelectric conversion layer 230. As a result, the second separation groove 240 is formed in the photoelectric conversion layer 230.

As shown in FIG. 1F, a second electrode 250 covering the photoelectric conversion layer 230 and the second separation groove 240 is formed by CVD or sputtering. The second electrode 250 may be made of a metal such as Al or Ag, or may be made of a transparent conductive oxide such as tin oxide (SnO ₂ ) or zinc oxide (ZnO).

As shown in FIG. 1G, a laser is irradiated in the air to scribe the photoelectric conversion layer 230 and the second electrode 250. Accordingly, the third separation groove 270 is formed in the photoelectric conversion layer 230 and the second electrode 250.

As shown in FIG. 1H, the protective layer 300 is photovoltaic to protect the photovoltaic cell 200 including the photoelectric conversion layer 230, the first electrode 210, and the second electrode 250. Cover the cell 200. The photovoltaic cell 200 converts light into electricity, and the changed electricity is supplied to the outside through the first electrode 210 and the second electrode 250 of the photovoltaic cell 200. The protective layer 300 may include ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), a thermosetting resin, or a photocurable resin. In addition, the protective layer 300 may include a back sheet formed on ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), thermosetting resin, or photocurable resin.

After the photovoltaic cell 200 is formed, the frame covers the side surface of the photovoltaic device including the photovoltaic cell 200 and the protective layer 300.

2 shows a photovoltaic module comprising a frame according to an embodiment of the invention. As shown in FIG. 2, the photovoltaic module according to the embodiment of the present invention includes a photovoltaic device 400 that converts light into electricity, a frame 500 and frames that cover the sides of the photovoltaic device 400. And a corner key 600 for fastening 500.

2 shows a cross section of the frame 500 along the A1-A2 line. Sides of the photovoltaic device 400 are inserted into the insertion grooves 510 of the frame 500. In addition, the frame 500 has a fastening hole 520 into which the corner key 600 for fastening the adjacent frames 500 is inserted. The frame 500 includes a mount fastening part 530 fastened to an installation mount (not shown).

2 illustrates a corner key 600 inserted into the fastening holes 520 of the adjacent frames 500 to fasten the adjacent frames 500. As shown in FIG. 2, the locking jaw portion 610 of the corner key 600 is exposed to the outside, and the insertion portion 620 of the corner key 600 is fastening grooves 520 of the adjacent frames 500. ) Is inserted. As such, the corner keys 600 are inserted into the fastening grooves 520 of the adjacent frames 500, such that the adjacent frames 500 are fastened.

Next, the corner key 600 included in the photovoltaic module according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 illustrates a corner key included in a photovoltaic module according to an embodiment of the present invention.

As shown in FIG. 3, the end of the frame 500 is caught by the locking jaw portion 610 of the corner key 600, and thus the locking jaw portion 610 is exposed to the outside. The locking jaw portion 610 of the corner key 600 limits the degree to which the insertion portion 620 of the corner key 600 is inserted into the fastening hole 520 of the frame 500.

Unlike the embodiment of the present invention, if there is no hooking portion in the corner key 600, the insertion portion of the corner key 600 is excessively inserted into the fastening hole 520 of the frame 500, or adjacent frames are not inserted at an appropriate level. Fastening of 500 may not be made stably.

That is, as shown in Figure 4, unlike the embodiment of the present invention, when there is no hooking portion in the corner key 600, the insertion portion of the corner key 600 is excessively inserted or not inserted at an appropriate level adjacent frames The ends of 500 may not exactly match. Accordingly, gaps may occur between the ends of the adjacent frames 500, and the gaps between the adjacent frames 500 may not only destabilize the fastening of the frame 500, but foreign substances or rainwater may be introduced.

Meanwhile, as illustrated in FIG. 3, the corner key 600 protrudes from the insertion portion 620 of the corner key 600 to contact the inner surface of the fastening hole 520 of the frame 500. It includes, the end of the protrusion 630 is bent in the direction opposite to the insertion direction of the insertion portion 620. As described above, since the end of the protrusion 630 is bent in the direction opposite to the insertion direction of the insertion part 620, the insertion part 620 is easily inserted into the fastening hole 520, but it is difficult to get out of the fastening hole 520. Therefore, after the adjacent frames 500 are fastened by the corner key 600, the fastening of the frames 500 is prevented from being weakened by pressure applied from the outside.

In addition, a tooth may be disposed on an inner surface of the fastening hole 520 that contacts the protrusion 630 to prevent the insertion part 620 from exiting the fastening hole 520. That is, when the insertion portion 620 is inserted in the insertion direction, the protrusion 630 contacts the inclined surface of the tooth, so that the insertion portion 620 may be easily inserted. However, since the insertion portion 620 comes into contact with the vertical surface of the tooth when the insertion portion 620 is pulled out of the direction opposite to the insertion direction, that is, the fastening hole 520, the insertion portion 620 becomes difficult to move. Accordingly, the fastening of the frames 500 by the corner key 600 may be more stably performed.

5A and 5B illustrate various forms of the locking step of the corner key included in the embodiment of the present invention. As shown in FIGS. 5A and 5B, the width w1 of the hooking jaw portion 610 of the corner key 600 exposed to the outside may be smaller than or equal to the width w2 of the frame 500. Accordingly, according to the request of the manufacturer of the photovoltaic module, the locking step portion 610 of the corner key 600 may have various forms.

6 illustrates another example of a corner key included in the photovoltaic module according to the embodiment of the present invention. As shown in FIG. 6, the locking jaw portion 610 of the corner key 600 protrudes in the same direction as the protrusion direction of the protrusion 630 of the corner key 600. Accordingly, various types of corner keys 600 may be formed according to the needs of the photovoltaic module manufacturer.

In the embodiment of the present invention, the pin type photovoltaic device and the nip type photovoltaic device have been described. However, the present invention relates to a bulk type photovoltaic device or various thin film photovoltaic devices made of single crystal or polycrystalline silicon which can be inserted into the frame. It can be applied to a photovoltaic module comprising a.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

1A to 1H illustrate a method of manufacturing a photovoltaic module according to an embodiment of the present invention.

2 shows a photovoltaic module comprising a frame according to an embodiment of the invention.

3 illustrates a corner key included in a photovoltaic module according to an embodiment of the present invention.

4 shows a corner key without a locking step.

5A and 5B illustrate various forms of the locking step of the corner key included in the embodiment of the present invention.

6 illustrates another example of a corner key included in the photovoltaic module according to the embodiment of the present invention.

Claims (7)

Photovoltaic devices that convert light into electricity; At least one frame having an insertion groove into which a side surface of the photovoltaic device is inserted, and a fastening hole; And A corner key for fastening adjacent frames among the one or more frames by forming an insertion part inserted into the fastening hole and a latching jaw part which takes an end of the frame. Photovoltaic module comprising a. The method of claim 1, The latching portion of the corner key is a photovoltaic module, characterized in that exposed to the outside. The method of claim 1, The corner key includes a protrusion protruding from the insertion portion to contact the inner surface of the fastening hole of the frame, An end of the protrusion is bent in the opposite direction to the insertion direction of the insertion portion of the photovoltaic module. The method of claim 1, The corner key includes a protrusion protruding from the insertion portion to contact the inner surface of the fastening hole of the frame, Photovoltaic module, characterized in that the tooth is located on the inner surface of the fastening hole to prevent the insertion portion exits out of the fastening hole. 5. The method of claim 4, And the protruding portion is in contact with the inclined surface of the tooth when the insert is inserted, and is in contact with the vertical surface of the tooth when the insert is removed from the fastening hole. The method according to claim 1 or 2, The photovoltaic module according to claim 1, wherein the width of the locking jaw portion of the corner key exposed to the outside is less than or equal to the width of the frame. The method of claim 1, The corner key includes a protrusion protruding from the insertion portion to contact the inner surface of the fastening hole of the frame, The photovoltaic module according to claim 1, wherein the locking step of the corner key protrudes in the same direction as the protruding direction of the protrusion of the corner key.

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