JP2005294395A - Solar cell module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar cell module which can improve beautiful external appearance by preventing that rear side members can be transparently observed from the surrounding of surface members and is remarkably improved in the value of a product. <P>SOLUTION: In the solar cell module 10 wherein a plurality of solar cells 18 arranged in parallel are covered with a glass plate 14, colored light shields 20 are formed at external sides of the plurality of solar cells 18 arranged in parallel. The light shield 20 is formed at the side of the solar cell 18 of the glass plate 14 and an uneven part 14A is formed on the surface at the side of the solar cell 18 of the glass plate 14. The light shield 20 is colored in the same color or almost in the same color as that of the solar cell 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a solar cell module that directly converts solar energy into electric energy, and more particularly to a structure of a solar cell module in which a plurality of light-shielding portions are colored and formed on the outer side of a plurality of solar cells arranged side by side.

  Conventionally, a solar cell module that directly converts solar energy into electric energy has a plurality of solar cells arranged side by side on a back member in which a resin and a film are laminated, and a front electrode and the back surface of an adjacent solar cell. The electrodes were connected in series or in parallel by electrically connecting them using a tab made of a metal foil to obtain a desired voltage and output. The solar cell module covered the upper surface of a plurality of solar cells arranged side by side on a back member with a surface member such as a glass plate having translucency (see Patent Document 1).

  As shown in FIG. 5, such a solar cell module 100 includes a plurality of solar cells 18 arranged in parallel between a back surface member (not shown) serving as a base and a glass plate 14 serving as a surface member. It is bonded and fixed with an adhesive 22 such as ethylene vinyl acetate (EVA). The surface of the glass plate 14 is usually formed on a pear ground provided with subtle irregularities such as the surface of a pear (fruit) or a float surface (mirror surface) in order to reduce the reflectance of sunlight.

  Here, the back member is silver so that the sunlight transmitted through the solar cells and the sunlight incident on the outer periphery of the solar cells are reflected and incident on the solar cells again to improve the power generation efficiency. It is composed of silver or white members that can efficiently reflect sunlight such as white. Thus, the output of a photovoltaic cell was improved by comprising a back surface member with a silver system or a white system material, and the effective use of sunlight was aimed at.

  In this case, the back member is made of a weather-resistant material such as a sandwich-type vinyl fluoride film of aluminum foil or a white synthetic resin in order to reflect sunlight and improve the power generation efficiency of the solar battery cell. The back surface member was seen through from the periphery of the glass plate 14 of the battery module 100. That is, the periphery of the solar cell module 100 looks white with respect to the color of the solar cell 18 (in this case, the solar cell color is a black system such as dark gray), and the appearance of the solar cell module 100 is impaired. . However, if the back member is made black, the aesthetic appearance of the solar cell module 100 is not spoiled, but if the back member is made black, the output of the solar cell is reduced by about several percent compared to the case where the white back member is used. There was an inconvenience.

  Therefore, the solar cell module 100 is shielded by forming a light-shielding portion around the glass plate 14 by laminating a light-shielding film 130 around the glass plate 14 outside the solar cells 18 arranged in parallel. It was. Thereby, while aiming at effective utilization of sunlight, it prevents that a back surface member permeate | transmits from the surroundings of the surface member (glass plate 14) of the solar cell module 100, and has improved the beauty | look of the solar cell module 100. It was.

Japanese Patent Laid-Open No. 11-312820

  However, a thin film is used as the light-shielding film for preventing the rear surface member from being seen from the periphery of the front surface member of the solar cell module, and the direction of the solar cell at the time of lamination or from the solar cell is used. It moves in the direction of separating or wrinkles. In this case, a reduction in power generation efficiency due to the solar cell being covered with the light-shielding film, or a haze of the back surface member or the light-shielding film is seen from the periphery of the surface member of the solar battery module. For this reason, it is difficult to produce a solar cell module that is satisfactory in appearance, and it has been desired to develop a solar cell module that can eliminate wrinkles of the light shielding film and improve the commercial value.

  Further, in order to prevent the back surface member from being seen through from the periphery of the front surface member of the solar cell module, a method of performing light shielding by printing or painting on the float surface of the surface member or the periphery of the satin surface is also conceivable. However, when printing or painting is performed on the float surface or pear surface, depending on the printing ink or coating material, the adhesive strength may be weak and may peel off.

  The present invention has been made to solve the problems of the related art, and prevents the rear surface member from being seen through from the periphery of the front surface member so as to improve the aesthetics. It aims at providing the solar cell module which prevented the color peeling and improved the commercial value significantly.

  That is, the solar cell module of the present invention is formed by covering a plurality of solar cells arranged side by side with a glass plate, and the light shielding portion is colored and formed on the outside of the solar cells arranged in parallel. It is characterized by.

  According to a second aspect of the present invention, in the above, the light-shielding portion has the same color or substantially the same color as the solar battery cell.

  The solar cell module of the invention of claim 3 is characterized in that, in claim 1 or claim 2, the light shielding portion is formed on the solar cell side of the glass plate.

  Moreover, the solar cell module of the invention of claim 4 is characterized in that, in claim 1, claim 2 or claim 3, unevenness is formed on the surface of the glass plate on the solar cell side.

  The solar cell module according to claim 5 is characterized in that, in claim 1, claim 2, claim 3 or claim 4, the light shielding portion is formed by applying a paint.

  As described above in detail, according to the present invention, in a solar cell module in which a plurality of solar cells arranged in parallel are covered with a glass plate, a light shielding portion is colored and formed on the outside of the solar cells in a state where a plurality of solar cells are arranged in parallel. Therefore, for example, as described in claim 2, when the light-shielding portion has the same color or substantially the same color as the solar cell, the color outside the solar cell becomes conspicuous with respect to the solar cells arranged in parallel. Can be prevented. Thereby, the aesthetics of the solar cell module can be greatly improved. Therefore, the commercial value of the solar cell module can be greatly improved.

  According to the invention of claim 3, in claim 1 or 2, since the light shielding part is formed on the solar cell side of the glass plate, for example, the light shielding part is formed on the light shielding part by an external force such as rain or wind. Inconveniences such as peeling off of color can be prevented in advance. Thereby, the aesthetics of the solar cell module can be maintained over a long period of time.

  Moreover, according to the invention of claim 4, in the claim 1, claim 2 or claim 3, since the unevenness is formed on the surface of the glass plate on the solar cell side, the surface area of the glass plate can be increased. It becomes. Thereby, even when it colors the surface at the side of the photovoltaic cell of a glass plate, it becomes possible to increase the adhesive strength of a glass plate and a colored coating material significantly. Therefore, inconveniences such as peeling of the glass plate and coloring can be reliably prevented.

  According to the invention of claim 5, in claim 1, claim 2, claim 3 or claim 4, since the light shielding portion is formed by applying a paint, for example, a conventional light shielding film Thus, it is possible to prevent inconvenience such as wrinkles on the light shielding portion. Thereby, the beauty | look of the light-shielding part can be improved significantly.

  In particular, even when unevenness is formed on the surface of the glass plate, since the paint can be applied to the entire uneven surface, the paint can be applied neatly and evenly on the light shielding portion. Also, since the paint can be made thicker than the conventionally used light-shielding film, for example, the back member provided on the lower side of the solar cell can be seen from the periphery of the solar cell through the glass plate, etc. It is possible to prevent the inconvenience. In particular, since the glass plates of the solar cell portions in a state where a plurality of solar cells are arranged can be covered with, for example, a mask, the solar cell portion is not colored by applying the paint only to the light shielding portion. Thereby, since a coating material can be reliably apply | coated only to a light-shielding part, inconveniences, such as a coating material covering a photovoltaic cell and reducing electric power generation efficiency, can be prevented.

  In addition, since the paint can be applied to the inside of the unevenness A, the surface area of the paint can be increased. Thereby, the adhesive strength of the glass plate 14 and the coloring agent 16 can be improved significantly, for example, the back surface member and coating material which were provided under the photovoltaic cell can be adhere | attached strongly. Therefore, inconveniences such as peeling of the glass plate and the back member can be surely prevented.

  The main feature of the present invention is to color the glass surface on the solar cell side in order to prevent the back surface member and the wrinkles of the back surface member from being seen from around the surface member. In order to prevent the back surface member from being seen from the periphery of the front surface member, it was realized simply by coloring the glass surface on the solar cell side by paint or printing.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a front view of a solar cell module 10 showing an embodiment of the present invention, FIG. 2 is a side view of the solar cell module 10, FIG. 3 is a back view of the solar cell module 10, and FIG. The principal part expansion longitudinal cross-sectional view is shown, respectively. In addition, what is shown with the same code | symbol as FIG. 5 in each figure is the same.

  As shown in FIG. 1 and FIG. 2, a plurality of solar cell modules 10 according to this example are provided between a back member 12 and a glass plate 14 (surface member) made of a weather resistant material such as a synthetic resin plate or a glass plate. The solar battery cells 18 are juxtaposed and fixed by an adhesive 22 such as ethylene vinyl acetate (EVA). Each solar battery cell 18 is provided with a lead wire attachment region (not shown), and a conductive material bump is formed as a positive and negative electrode in this lead wire attachment region, and the lead wire is connected to this conductive material bump. By doing so, it is comprised so that an output can be taken out from the solar cell module 10.

  That is, the solar cell module 10 uses a copper foil ribbon wire to connect each of the solar cells 18 in series or in parallel by an automatic machine to produce a string. Connect with foil ribbon wire. And although not shown in figure, the glass plate 14 (surface member), a transparent adhesive sheet, the stringed solar cell 18, the transparent adhesive sheet, and the back surface member 12 are set in order and fixed with a predetermined adhesive 22. That is, the solar cell module 10 has an output per 181 solar cells as small as several watts, so that usually several solar cells 18 are electrically connected in series or in parallel and the output is several tens of watts. Increased to several hundred watts.

  Then, as shown in FIG. 3, the output lead wire 26 is connected to a terminal box 24 attached to the back surface of the solar cell module 10, and the connection portion is covered and protected with a resin coat (not shown) or the like, and finished product inspection ( Output measurement inspection and the like). A frame made of aluminum or resin (not shown) is fixed to the solar cell module 10 with an adhesive, a screw, a press-fitting piece or the like, or the solar cell module 10 is attached to a backing material. It is attached. Thus, the solar cell module 10 is reinforced so as not to be damaged and can be easily handled. Of course, the string connection inspection is performed on the solar battery cell 18 in a stringed state.

  On the other hand, the glass plate 14 is made of transparent tempered glass, and the surface is a pear ground provided with subtle irregularities such as the surface of pear (fruit) in order to reduce the reflectance of ordinary sunlight as in the conventional example. Or it is formed in the float surface (mirror surface), and the unevenness | corrugation 14A rougher than a satin surface is formed in the surface at the side of the photovoltaic cell 18. FIG. The unevenness 14A has a round shape or a square shape with a diameter of about 0.5 mm to 0.8 mm. Specifically, the unevenness 14A is formed to be uneven with respect to the surface of the solar battery cell 18 in a shape such as a semicircular cross section, a trapezoidal shape, a sword mountain shape, or a diamond shape (diamond shape).

  The glass plate 14 is provided with a light-shielding portion 20 that protrudes by a predetermined dimension on the outside (in the embodiment, both sides) of the solar cells 18 that are arranged in parallel. The light shielding part 20 is provided outside the solar battery cells 18 in a state where a plurality of solar battery cells 18 are arranged in parallel between the back surface member 12 and the front surface member (glass plate 14), and the light shielding part 20 is made of glass. The plate 14 is formed on the surface of the solar battery cell 18 side. The light-shielding portion 20 is colored with a colorant 16 so that the rear surface member 12 is not visible through the surface member (glass plate 14).

  The colorant 16 is formed by applying or printing a paint containing ink of the same color or substantially the same color as the solar battery cell 18. For example, when the color of the solar cell 18 is dark gray, the colorant 16 is a color similar to the color of the solar cell 18 or the color of the solar cell 18 such as dark gray, dark blue, and dark brown. Is used.

  Then, a mask having a shape covering a plurality of solar cells 18 arranged side by side is disposed on the glass plate 14, and when the colorant 16 is a paint, the paint is sprayed onto the light shielding portion 20 of the glass plate 14. As a result, the light-shielding portion 20 is painted with the color of the paint, and the paint can be applied up to the unevenness 14A. Thus, since the coating material of a predetermined color is sprayed on the light shielding part 20, even if the unevenness 14A is formed on the glass plate 14, it is possible to reliably coat the unevenness 14A. In particular, since a plurality of solar cells 18 arranged side by side are covered with a mask, the solar cells 18 are not colored with the colorant 16 (paint). As a result, since the paint can be reliably applied only within the range of the light shielding portion 20, it is possible to prevent inconveniences such as the paint covering the solar battery cells 18 and reducing the power generation efficiency. Although the paint can be sufficiently thick even if it is applied once, the thickness of the colorant 16 can be increased by applying it twice or three times, and light can be shielded more reliably. Further, since the paint can be applied up to the unevenness 14A as shown in FIG. 4, the surface area of the paint can be increased. Thereby, the adhesive strength of the glass plate 14 and the coloring agent 16 can be improved significantly.

  When the colorant 16 is ink, the ink is screen printed on the light shielding portion 20. In this case, a screen having the same shape as the light-shielding portion 20 outside the solar cells 18 arranged in parallel is arranged on the glass plate 14 and ink (colorant 16) is printed on the light-shielding portion 20 of the glass plate 14. To do. As a result, the light-shielding portion 20 is printed with ink, and since the ink has fluidity, printing can be performed up to the inside of the unevenness 14A. Thus, since the ink of a predetermined color is printed on the light shielding part 20, even if the unevenness 14A is formed on the glass plate 14, the ink can be reliably printed up to the inside of the unevenness 14A. As a result, the plurality of solar battery cell 18 portions arranged side by side can be reliably printed with ink only in the range of the light shielding portion 20 without being colored with the colorant 16 (ink). Inconveniences such as reducing the power generation efficiency by covering the cover can be prevented. Further, since the ink can be printed up to the unevenness 14A as shown in FIG. 4, the surface area of the printed ink can be enlarged. Thereby, the adhesive strength of the glass plate 14 and the coloring agent 16 can be improved significantly.

  That is, in the solar cell module 10, the back surface member 12 is configured in a white system as in the past, and only the portion (in this case, the light shielding portion 20 of the glass plate 14) that is outside the solar cell 18 in a state where a plurality of the back surface members 12 are arranged in parallel. Is colored with a colorant 16. Thereby, the fall of the reflectance of the sunlight by the back surface member 12 can be reduced, and it can prevent that the beauty | look of a solar cell module is impaired.

  As described above, the solar cell module 10 forms the light shielding portion 20 outside the solar cells 18 in a state of being arranged in parallel with the colorant 16, and the light shielding portion 20 has the same color or substantially the same color as the solar cell 18. By doing, it can prevent that the color of the photovoltaic cell 18 outer side becomes conspicuous with respect to the photovoltaic cell 18 of the state arranged in multiple numbers. Thereby, the aesthetic appearance of the solar cell module 10 can be greatly improved, and the commercial value of the solar cell module 10 can be greatly improved.

  Moreover, since the light shielding part 20 is formed on the solar battery cell 18 side of the glass plate 14, inconveniences such as the colorant 16 colored on the light shielding part 20 being peeled off by an external force such as rain or wind are obstructed. can do. Thereby, the beauty | look of the solar cell module 10 can be maintained over a long period of time.

  Moreover, since the unevenness | corrugation 14A is formed in the surface at the side of the photovoltaic cell 18 of the glass plate 14, it becomes possible to increase the surface area of the glass plate 14. FIG. Thereby, even when it colors with the coloring agent 16 on the surface at the side of the photovoltaic cell 18 of the glass plate 14, the adhesive strength of the glass plate 14 and the coloring agent 16 does not become weak. Therefore, inconveniences such as the colorant 16 peeling off from the glass plate 14 can be reliably prevented.

  Moreover, since the light shielding part 20 is formed by applying the colorant 16 (paint), it is possible to prevent inconveniences such as wrinkles on the light shielding part 20 as in the conventional light shielding film. It becomes. Thereby, the beauty | look of the light-shielding part 20 can be improved significantly.

  Moreover, even when the unevenness 14A is formed on the surface of the glass plate 14, the colorant 16 (paint) can be applied to the entire surface of the unevenness 14A. Thereby, the colorant 16 (paint) can be applied to the light-shielding portion 20 neatly and uniformly. Further, since the coloring of the colorant 16 (paint) can be increased, it is possible to prevent inconveniences such as the rear surface member 12 being seen through the light shielding portion 20. Thereby, it becomes possible to light-shield the light-shielding part 20 reliably, and the aesthetics of the light-shielding part 20 can further be improved. In particular, the colorant 16 (paint) is provided with a mask covering the solar battery cell 18 on the glass plate 14 and sprayed with the paint (colorant 16) on the light-shielding portion 20, so that the paint is the solar battery cell. It is also possible to prevent inconveniences such as a decrease in power generation efficiency due to application to the upper surface of 18.

  Further, when the colorant 16 (ink) is printed on the light-shielding part 20, the ink can be uniformly printed on the light-shielding part 20, and the colorant 16 (ink) is silk-printed. Therefore, it is possible to reliably print at a predetermined position. This prevents inconveniences such as printing moving in the direction of the solar battery cell 18 or in a direction away from the solar battery cell 18 or wrinkles, as in a conventional light-shielding film. Therefore, it is possible to print neatly on the light shielding portion 20. Therefore, it is possible to prevent inconveniences such as the printed colorant 16 (ink) covering the solar battery cell 18 and the power generation efficiency is lowered.

  In particular, the colorant 16 made of paint or ink can be freely changed in color and can display characters and pictures as well, so the manufacturer's name or other design can be put in the shading part 20. You can also. As a result, it is possible to improve the merchandise advertising effect and improve aesthetic modeling properties. Therefore, the convenience of the solar cell module can be further improved.

  In addition, in the Example, although the thing which covered the photovoltaic cell 18 arranged in multiple numbers with the glass plate 14 was demonstrated as the solar cell module 10, the solar cell module 10 is a solar cell panel which combined the said solar cell module 10 with two or more. It goes without saying that the same effect can be obtained even if the present invention is applied as a solar cell module.

It is a front view of the solar cell module of the present invention. It is a side view of the solar cell module of FIG. It is a reverse view of the solar cell module of FIG. It is a principal part expanded longitudinal cross-sectional view of the solar cell module of this invention. It is a principal part expansion longitudinal cross-sectional view of the conventional solar cell module.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Solar cell module 12 Back surface member 14 Glass plate 14A Concavity and convexity 16 Colorant 18 Solar cell 20 Light-shielding part

Claims (5)

In a solar cell module formed by covering a plurality of solar cells arranged side by side with a glass plate,
A solar cell module, characterized in that a light-shielding portion is colored and formed on the outside of the plurality of solar cells arranged side by side.   The solar cell module according to claim 1, wherein the light shielding portion has the same color or substantially the same color as the solar cell.   The solar cell module according to claim 1 or 2, wherein the light shielding portion is formed on a solar cell side of the glass plate.   4. The solar cell module according to claim 1, wherein irregularities are formed on a surface of the glass plate on the solar cell side.   The solar cell module according to claim 1, 2, 3, or 4, wherein the light shielding portion is formed by applying a paint.

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