JP2005072511A - Solar battery module and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar battery module having excellent external appearances on the light-receiving side in harmony with a building to which the solar battery module is provided and its ambient environments by making less conspicuous opaque wires provided around the solar cell group by a simple method. <P>SOLUTION: The solar battery module having excellent external appearances on the light-receiving side in harmony with a building to which the solar battery module is provided, and its ambient environments is provided by arranging a colored light-receiving-side sealing material at the periphery of the solar battery module and hiding wires at the ends of the solar battery module such as transverse wires or connection wires. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a solar cell module, and more particularly to a solar cell module with improved appearance and appearance from the light receiving surface side and a method for manufacturing the same.

  Although the solar cell element is manufactured using a single crystal silicon substrate, a polycrystalline silicon substrate, or the like, the solar cell element is weak against physical impact. In addition, when a solar cell is installed outdoors, it must be protected from rain.

  Furthermore, since the electric output generated by one solar cell element is small, a plurality of solar cell elements are connected in series and parallel so that a practical electric output can be taken out. A plurality of solar cell elements are connected to each other and further sealed with a filler mainly composed of ethylene vinyl acetate copolymer (EVA) or the like, thereby forming a solar cell module.

  A conventional solar cell module will be described with reference to FIGS.

  FIG. 5 is a schematic cross-sectional structure of a solar cell panel portion of this solar cell module, where 1 is a translucent substrate, 2 is a light receiving surface side filler, 3 is a solar cell element, 4 is a back surface side filler, 5 is A back surface protective material 6 is a connection wiring.

  A plurality of solar cell elements 3 are arranged in a matrix to form a solar cell element group. Moreover, although the solar cell elements 3 arranged in a line in the vertical direction are connected by the connection wiring 6, so-called lateral wiring 7 that further connects the connection wiring 6 is provided around the solar cell element group. Provide.

  As described above, the translucent substrate 1, the light receiving surface side filler 2, the plurality of solar cell elements 3, the back surface side filler 4, and the back surface protective material 5 connected by the lateral wiring 7 and the connection wiring 6 are arranged in this order. The laminated structure is set in an apparatus called a laminator, and pressed and integrated while heating under reduced pressure.

  FIG. 6 is an external view of the light receiving surface side of a conventional solar cell module. In addition, the same code | symbol is attached | subjected to the same location as the member shown in FIG.

  According to the solar cell module shown in the figure, the module frame 8 is provided around the solar cell panel portion shown in FIG. Specifically, the module frame 8 is attached to the outer peripheral portion of the solar cell panel, and the corner portion is screwed to fix the module frame.

  In such a solar cell module, the horizontal wiring 7 is provided in order to match the arrangement of the solar cell elements 3 to the outer dimensions of the solar cell module. On the other hand, the coupling wiring 9 is provided to connect the connection wirings 6 having the same polarity in the solar cell elements at the ends of the plurality of solar cell elements 3 connected in series or in parallel.

  These lateral wiring 7 and coupling wiring 9 are usually cut to a predetermined length by solder-coating the entire surface using a copper foil having a thickness of about 0.1 to 0.3 mm and a width of about 2 to 7 mm. It is used as.

  The color tone of the module frame 8, the back surface side filler 4, and the back surface protection material 5 is colored in a suitable color tone that does not give a sense of incongruity depending on the building such as a house where the solar cell module is installed and the surrounding situation. On the other hand, since the lateral wiring 7 and the coupling wiring 9 are solder coated on the entire surface of the copper foil as described above, the appearance is a silver metallic luster.

  Therefore, there were the following problems.

  When the module frame 8, the back surface side filler 4, and the back surface protective material 5 are, for example, white, blue, or black, the lateral wiring 7 and the coupling wiring 9 are very conspicuous because of the silver metallic luster. The design of the overall appearance of the building or the like where the solar cell module was installed was deteriorated.

In order to solve such a problem, it has been devised to cover a wiring member used for the lateral wiring 7 and the coupling wiring 9 with a colored resin or film (see Patent Document 1 and Patent Document 2).
JP 2001-339089 A JP 2003-86820 A

  However, if it is going to coat | cover the wiring member used for the horizontal wiring 7, the coupling wiring 9, etc. with the colored resin and film, the material cost was added by using the resin and film for it.

  Further, a process for covering the wiring material is added, and as a result, there is a problem that the manufacturing cost of the solar cell module is greatly increased.

  In addition, when connecting the connection wiring 6, the lateral wiring 7 or the coupling wiring 9 to the solar cell element 3, it is normally performed by soldering. As a result, as described above, the lateral wiring 7 and the coupling wiring are performed. In the conventional technique of covering the wiring member used for 9 or the like with a colored resin or film, there is a problem that the resin or film is denatured and discolored by the heat of soldering and the original purpose is not achieved. .

  The present invention has been made in view of such problems, and the object thereof is to make the non-transparent wiring provided in the peripheral portion of the solar cell element group inconspicuous by a simple method, whereby the solar cell module is installed. It is to provide a solar cell module having a good appearance on the light receiving surface side in harmony with a building and its surrounding environment.

  Another object of the present invention is to provide a method for manufacturing a solar cell module that achieves the object of the present invention by reducing the manufacturing cost.

  The solar cell module of the present invention is formed by sequentially laminating a light-receiving surface side sealing material, a solar cell element group in which a plurality of solar cell elements are arranged, a back surface side sealing material, and a back surface protection material on a translucent substrate. A non-transparent wiring among the wirings for electrically connecting each solar cell element is provided in the periphery of the solar cell element group, and a light-receiving surface side sealing material portion disposed on a portion facing the solar cell element group The light-receiving surface side sealing material portion made of a transparent material and disposed in a portion facing the peripheral portion of the solar cell element group is made of a light-shielding material.

  In another solar cell module of the present invention, the light-shielding material extends a light-receiving surface side sealing material portion disposed at a portion facing the solar cell element group, and a light-shielding portion is formed in the extending portion. It is characterized by comprising.

  Still another solar cell module of the present invention is characterized in that the light shielding material is whitened or colored.

  The manufacturing method of the solar cell module according to the present invention includes the steps (1) to (5) below, followed by heating and pressurization under reduced pressure, and a light-receiving surface side seal disposed at a portion facing the solar cell element group. The stop material portion is made of a transparent material, and the light receiving surface side sealing material portion disposed in a portion facing the peripheral portion of the solar cell element group is integrated by being made of a light shielding material.

  (1) A light-receiving surface side sealing material made of a transparent material and a light-shielding material is disposed on a light-transmitting substrate.

  (2) A plurality of solar cell element groups in which a plurality of solar cell elements are arranged on the light receiving surface side sealing material are arranged.

  (3) While electrically connecting the said solar cell element group by wiring, non-transparent wiring is provided in the peripheral part of a solar cell element group among this wiring.

  (4) A back surface side sealing material is disposed on the solar cell element group.

  (5) A back surface protective material is disposed on the back surface side sealing material.

  According to the present invention, in the solar cell module in which the non-transparent wiring is provided in the peripheral portion of the solar cell element group among the wirings for electrically connecting the solar cell elements, the solar cell element group is disposed at a portion facing the solar cell element group. The light-receiving surface side sealing material portion is made of a transparent material, and the light-receiving surface side sealing material portion arranged in a portion facing the peripheral portion of the solar cell element group is made of a light-shielding material. As a result, a solar cell module having a good appearance on the light-receiving surface side can be obtained, and as a result, it can be harmonized with a mounting body on which the solar cell module is installed, such as a house or a building, and the surrounding environment. It was.

  Further, according to the present invention, the light receiving surface side sealing material portion disposed in the portion facing the solar cell element group is made of a transparent material, and the light receiving surface side disposed in the portion facing the peripheral portion of the solar cell element group. By integrating the sealing material portion with a light shielding material, both the light receiving surface side sealing material portion that becomes transparent and the light receiving surface side sealing material portion that is colored and has light shielding properties The boundary of the line was almost a straight line, and in that respect it was possible to achieve a good finish with a good appearance.

  Furthermore, according to the manufacturing method of the present invention, in the step (1), it is only necessary to arrange the light-receiving surface side sealing material made of a transparent material and a light-shielding material on the translucent substrate. The set time when setting a laminated member consisting of a translucent substrate, a light-receiving surface side sealing material, a solar cell element group, a back surface side sealing material and a back surface protection material can be shortened. Cost was reduced.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view showing the main structure of a solar cell panel section in the solar cell module of the present invention. FIG. 2 is an external view of the light receiving surface side of the solar cell module.

  In FIG. 1, 11 is a translucent substrate, and on this translucent substrate 11, the transparent light-receiving surface side filling which is the light-receiving surface side sealing material part arrange | positioned in the site | part facing the said solar cell element group. The light-receiving surface side filling made of, for example, a colored or whitened light-shielding material made of a light-shielding material that is a light-receiving surface-side sealing material portion disposed in a portion facing the periphery of the solar cell element group A solar cell element group in which a plurality of solar cell elements 13 are arranged thereon, a back surface side filler 14 that is the back surface side sealing material, and a back surface protection material 15 are sequentially disposed. It is a configuration.

  According to this example, a plurality of solar cell elements 13 are arranged in a matrix to form a plurality of solar cell element groups. According to this arrangement, the solar cell elements 13 arranged in a line in the vertical direction are arranged. A solar cell element group connected by the connection wiring 16 and arranged in an example is provided. A so-called lateral wiring 17 for further connecting these connection wirings 16 is provided around the solar cell element group.

  Thus, the translucent substrate 11, the light receiving surface side fillers 12 a and 12 b, the plurality of solar cell elements 13 (a plurality of solar cell element groups) connected by the lateral wiring 17 and the connection wiring 16, and the back surface side filler 14. The back surface protective material 15 is laminated in this order, and is set in a device called a laminator, and pressed and integrated while heating under reduced pressure.

  According to the solar cell module shown in FIG. 2, the module frame 18 is attached to the outer peripheral portion of the solar cell panel portion shown in FIG. 1, the corner portion is screwed, and the module frame 18 is fixed.

  In such a solar cell module, the horizontal wiring 17 is provided in order to match the arrangement (solar cell element group) of the solar cell elements 13 to the outer dimensions of the solar cell module. On the other hand, in FIG. 1 and FIG. 2, the coupling wiring (corresponding to the coupling wiring 9 shown in FIG. 6) is not clearly shown, but the plurality of solar cell elements 13 connected in series or in parallel with respect to this coupling wiring. In the solar cell element at the end of the (solar cell element group), it is provided to connect the connection wires 16 having the same polarity.

  These lateral wiring 17 and coupling wiring are usually cut to the required length by soldering the entire surface using copper foil having a thickness of about 0.1 to 0.3 mm and a width of about 2 to 7 mm. Used.

  Next, each member is explained in full detail about the solar cell module of the said structure.

  As the translucent substrate 11, a substrate made of a synthetic resin material such as a glass material or a polycarbonate resin is used.

  As the glass plate, white plate glass, tempered glass, double tempered glass, heat ray reflective glass and the like are used, but generally white plate tempered glass having a thickness of about 3 mm to 5 mm is used.

  On the other hand, when a substrate made of a synthetic resin such as polycarbonate resin is used, a substrate having a thickness of about 5 mm is used.

  The light receiving surface side fillers 12a and 12b and the back surface side filler (back surface side sealing material) 14 are made of an ethylene-vinyl acetate copolymer (hereinafter, ethylene-vinyl acetate copolymer is abbreviated as EVA), and have a thickness. The sheet-like form of about 0.4 to 1 mm is used. These are fused and integrated with other members by applying heat and pressure under reduced pressure using a laminating apparatus.

  In addition, with respect to the light receiving surface side fillers 12a and 12b and the back surface side filler 14, the vinyl acetate content is preferably 10% by weight or more and less than 40% by weight, and most preferably 20 to 30% by weight.

  If the content of vinyl acetate is less than 10% by weight, the melting point becomes high and it may be difficult to process into a sheet. On the other hand, if it is 40% by weight or more, it is not preferable in that the EVA sheet after molding becomes highly fluid.

  The light receiving surface side filler 12a is a transparent light receiving surface side sealing material portion laminated on the solar cell element 13, whereas the light receiving surface side filler 12b is made of a light shielding material, for example, the sun. All or a part of the portion not facing the battery element 13 is whitened or colored.

  In this example, as shown in FIG. 2, in the rectangular solar cell element group, the light receiving surface side fillers 12b are arranged in a strip shape along the opposite sides.

  The width of the light receiving surface side filler 12b is substantially the same as the dimensions of the end portions of the solar cell element 13 and the translucent substrate 11 in the portion where the lateral wiring 17 and the coupling wiring are present, or is received during lamination. Considering the spread when the surface-side filler 12a is melted, it may be about 2 to 10 mm smaller than this dimension.

  In the EVA constituting the light receiving surface side filler (light receiving surface side sealing material portion) 12a, the amount of light incident on the solar cell element 13 is reduced by coloring, so that the power generation efficiency tends to decrease. And However, it may be colored as long as the transparency is maintained.

  The light-receiving surface-side filler (light-receiving surface-side sealing material portion) 12b is colored in a required color by containing EVA with titanium oxide or a known pigment. As a result, the lateral wiring 17 and the coupling wiring (not shown) which are the non-transparent wiring can be covered and made invisible from the light receiving surface side, and as a result, the appearance of the solar cell module is improved. Can do.

  The solar cell element 13 is made of single crystal silicon or a polycrystalline silicon substrate having a thickness of about 0.3 to 0.4 mm. A PN junction is formed inside the substrate, electrodes are provided on the light receiving surface and the back surface, and an antireflection film is provided on the light receiving surface.

  The size of the substrate is about 100 to 150 mm square in a polycrystalline silicon solar cell, and a plurality of such solar cell elements 13 are connected in series or in parallel by connection wirings 16 such as copper foil. Connect and use.

  About the connection wiring 16, the solar cell elements are electrically connected to each other. Usually, a copper foil having a thickness of about 0.1 mm and a width of about 2 mm is used, and the entire surface of the copper foil is solder coated. It is cut into a required length and soldered onto the electrode of the solar cell element 13 for use.

  The back surface side filler (back surface side sealing material) 14 may be formed of a transparent material such as EVA, but the EVA may contain titanium oxide, a pigment, or the like, thereby coloring it to a required color. . That is, the color tone of the back surface side sealing material 14 may be a color tone in harmony with the building in which the solar cell module is installed and the surrounding environment.

  In particular, in a solar cell module that is installed in a place that is not very visible such as the roof of a building or the roof of a factory, the solar cell element 13 such as a gap between the solar cell element 13 and the solar cell element 13 of the solar cell module. It is preferable to improve the power generation efficiency by reflecting the light incident on the non-existing portion and reflecting the reflected light again on the light-transmitting substrate 11 and entering the solar cell element 13. In this respect, it is preferable to whiten the light so that the light is easily reflected (so that light is not easily absorbed or transmitted).

  As the back surface protective material 15, a weather-resistant fluorine-based resin sheet in which an aluminum foil is sandwiched so as not to transmit moisture, a polyethylene terephthalate (PET) sheet in which alumina or silica is deposited, and the like are used.

  In particular, the back surface protection material 15 using PET resin is annealed before use, so there is almost no heat shrinkage at the time of lamination. This is preferable in that it does not occur.

  For example, in the case of using a PET resin material, a three-layer structure is preferable, and a pigment such as titanium oxide is added to the PET resin material for whitening the innermost side (the surface side in contact with the back side sealing material). And the thickness is 50 μm. On the outside, a 12-μm thick PET sheet deposited with silica is pasted. This is because silica is vapor-deposited only on one side between the inner white PET resin material. On the outside, a PET sheet having a hydrolysis resistance of 50 μm is used so that the PET resin does not hydrolyze due to rain or the like.

  The back surface protective material 15 is made of a weather-resistant fluorine-based resin sheet sandwiched with an aluminum foil so as not to transmit moisture, or a polyethylene terephthalate (PET) sheet deposited with alumina or silica.

  As described above, the solar cell element 13 connected to the translucent substrate 11, the transparent light receiving surface side filler 12a, the colored light receiving surface side filler 12b, the connection wiring 16 connecting the lateral wiring 17, and the like, the back surface side. The filler 14 and the back surface protective material 15 are sequentially laminated, set in a device called a laminator, and pressed and integrated while heating under reduced pressure to produce a solar cell panel.

  Next, the module frame 18 is attached to the four sides of the integrated solar cell panel. The module frame 18 is made of an aluminum metal material or a synthetic resin in consideration of the strength and cost required for the solar cell module.

  In the case of producing an aluminum metal material, the aluminum material is extruded and anodized or clear-coated on the surface.

  Furthermore, a solar cell module is completed by attaching a terminal box (not shown) for connecting the solar cell element to an external circuit on the back side of the solar cell panel with an adhesive.

(Method for manufacturing solar cell module)
Next, the production direction of the present invention will be described.

  The manufacturing method of the solar cell module of the present invention goes through the steps (1) to (5) sequentially as follows, and the laminate obtained thereby is heated and pressurized under reduced pressure.

  In addition, according to the manufacturing method of the present invention, the light-receiving surface side sealing material portion disposed in the portion facing the solar cell element group is made of a transparent material and disposed in the portion facing the peripheral portion of the solar cell element group. The light-receiving surface side sealing material portion is heated and pressed under reduced pressure so as to be formed of a light-shielding material, and integrated.

  (1) Process: The light-receiving surface side sealing material which consists of a transparent material and a light-shielding material is distribute | arranged on a translucent board | substrate.

  That is, on the rectangular translucent substrate 11, a rectangular light-receiving surface-side filler 12a made of an ethylene-vinyl acetate copolymer (EVA resin) and a strip-shaped light-receiving surface-side filler 12b are disposed. The light receiving surface side filler 12b is disposed on the opposite side of the light receiving surface side filler 12a.

  (2) Step: A plurality of solar cell element groups in which a plurality of solar cell elements are arranged on the light receiving surface side sealing material are arranged.

  That is, a plurality of solar cell element groups in which a plurality of solar cell elements are arranged on a light receiving surface side sealing material including a light receiving surface side filler 12a and a light receiving surface side filler 12b are arranged as a plurality of examples.

  (3) Step: Each solar cell element group is electrically connected by wiring, and non-transparent wiring, for example, lateral wiring 17 and coupling wiring (not shown) are connected to the periphery of the solar cell element group. Provide.

  (4) Process: A back surface side sealing material is disposed on the solar cell element group.

  That is, the rectangular back surface side sealing material 14 made of EVA resin is disposed on the solar cell element group.

  (5) Process: The back surface protective material 15 is disposed on the back surface side sealing material 14.

  Through the steps as described above, translucent substrate 11, light-receiving surface side sealing material 12 (light-receiving surface-side filler 12a and light-receiving surface-side filler 12b), solar cell element group, back surface side sealing material 14 and back surface The laminated body of the protective material 15 is bonded and integrated, but it is desirable that the EVA resin does not protrude from the translucent substrate 11 when each member is laminated before such lamination.

  Therefore, the back surface side sealing material 14 is arranged so as to cover the light receiving side sealing material 12, but the peripheral edge portion of the back surface side sealing material 14 is further arranged inside the peripheral edge portion of the translucent substrate 11. And it laminates | stacks so that the peripheral edge part of the light-receiving surface side sealing material 12 may be arrange | positioned inside the peripheral edge part of the back surface side sealing material 14. FIG.

  After such lamination, the laminate is set in a device called a laminator that is heated and pressurized in a depressurized state, and then depressurized to about 50 to 150 Pa in order to remove the air inside the solar cell module. Pressurize while heating at a temperature of ˜200 ° C. for 15 minutes to 1 hour. Thereby, since the light-receiving surface side sealing material 12 and the back surface side sealing material 14 were softened and fused, each member was bonded and integrated, and the panel portion of the solar cell module could be manufactured.

  Next, a module frame (not shown) is attached to the four sides of the integrated solar cell panel, and a terminal box (not shown) is attached to the back side of the solar cell panel with an adhesive, whereby the solar cell. The module is complete.

  Thus, according to the solar cell module of the present invention, the non-transparent wirings such as the lateral wirings 17 and the coupling wirings (not shown) are blocked by the light-receiving surface-side filler (light-receiving surface-side sealing material portion) 12b. By covering, it can be made invisible from the light receiving surface side, the decorativeness and aesthetics of the solar cell module can be improved, and as a result, a mounting body for installing the solar cell module, such as a house or a building, It was possible to harmonize with the surrounding environment.

  Further, according to the manufacturing method of the present invention, in step (1), the light-receiving surface side sealing material 12 (light-receiving surface-side filler 12a and light-receiving surface-side filler 12b) is disposed on the translucent substrate 11. Therefore, a laminated member made up of a translucent substrate 11, a light-receiving surface side sealing material 12, a solar cell element group, a back surface side sealing material (filler) 14, and a back surface protection material 15 is set in a laminator. In this case, the set time can be shortened, and the manufacturing cost can be reduced.

  According to the above-described example of the present invention, the light receiving surface side sealing material portion disposed in the portion facing the peripheral portion of the solar cell element group is made of the light shielding material, so that the object of the present invention can be achieved. However, such a light shielding material may have various other configurations.

  For example, a light-shielding metal plate or ceramic plate may be disposed at a portion facing the periphery of the solar cell element group.

  Alternatively, the light receiving surface side sealing material portion (light receiving surface side filling material 12a) disposed in a portion facing the solar cell element group is extended, and the surface of this extended portion is processed to have light scattering properties. However, this may be used as a light shielding material.

  Next, another example of the present invention will be described.

  An example of the light-shielding material formed by extending the light-receiving surface side sealing material portion disposed in the portion facing the solar cell element group and forming the light-shielding portion in the extended portion will be described with reference to FIGS.

  FIG. 3 is a schematic cross-sectional view showing an enlarged main part showing the end of the light-receiving surface side sealing material, and FIG. 4 is a solar cell in the solar cell module of the present invention using such light-receiving surface side sealing material. It is a schematic sectional drawing which shows the main structures of a panel part. In addition, the same code | symbol is attached | subjected to the same location as the solar cell module shown in FIG. 1 and FIG.

  In the solar cell module shown in FIG. 1 and FIG. 2 described above, the light receiving surface side filler 12b is provided as a light shielding material in addition to the light receiving surface side filler 12a, but instead of this, the light receiving surface side filler 20a. The light shielding portion 20b is formed in the extending portion.

  Such a light receiving surface side filler 20a is a light receiving surface side sealing material that becomes transparent by polymerization crosslinking, such as a synthetic resin such as EVA, and the light shielding portion 20b includes such a synthetic resin containing a pigment or the like. It is a colored light-receiving surface side sealing material.

  The light shielding part 20b colored in this way may be made of the same material as the light receiving surface side filler 12b described above.

  Further, the colored light-shielding portion 20b is cut into a strip shape, and the light-shielding portion 20b is fused in advance to a predetermined position at the end of the light-receiving surface-side filler 20a that is transparent. This fusion is, for example, ultrasonic fusion or thermal fusion.

  And in the (1) process of the manufacturing method mentioned above, the light-receiving surface side filler 20a which the light-shielding part 20b was fuse | melted in that way on the translucent board | substrate 11 is distribute | arranged. Other manufacturing processes are as described above.

  In this example, the size of the light-receiving surface side sealing material 20a that is transparent is the same as the size of the light-transmitting substrate 11, or the light-receiving surface side sealing material 20a spreads due to the influence of heat and pressure in the laminating apparatus. In some cases, the size is made about 2 to 10 mm smaller than the translucent substrate 11.

  Further, the width of the colored light-shielding portion 20b is also the same as the dimension between the outermost solar cell element 13 and the translucent substrate 11, or is reduced by about 2 to 10 mm in consideration of the spread in the laminate.

  Such a translucent substrate 11, a transparent light-receiving surface-side filler 20a, a colored light-shielding portion 20b, a solar cell element 13 connected to a connection wiring 16 that connects the lateral wiring 17, etc., a back-side filler 14; The back surface protection material 15 is laminated | stacked one by one, is set to a laminator, presses and integrates, heating under reduced pressure, and produces a solar cell panel.

  Thus, also in the solar cell module of the present invention, the non-transparent wiring such as the lateral wiring 17 and the coupling wiring (not shown) can be covered with the light-shielding portion 20b so as to be invisible from the light receiving surface side. The decorativeness and aesthetics of the battery module can be enhanced, and the battery module can be harmonized with a mounting body on which the solar cell module is installed, such as a house or a building, and the surrounding environment.

  Further, according to the manufacturing method of the present invention, the light receiving surface side sealing material 20 (the light receiving surface side filler 20a and the light shielding portion 20b) is simply disposed on the translucent substrate 11 in the step (1). Since it is good, when setting the laminated member which consists of the translucent board | substrate 11, the light-receiving surface side sealing material 20, the solar cell element group, the back surface side sealing material (filler) 14, and the back surface protection material 15 to a laminator. The set time could be shortened, thereby reducing the manufacturing cost.

  Furthermore, when a member is set on the laminator by using a previously fused light-shielding portion 20b on the end portion of the light-receiving surface side sealing material 20a that is transparent, as described above, it is transparent. Compared to the step of separately setting the light receiving surface side sealing material 12a and the colored light receiving surface side sealing material 12b separately, the time can be shortened.

  Moreover, according to this example, in the finished state of the solar cell panel after lamination, as shown in FIG. 1, the transparent light-receiving surface side sealing material 12a and the colored light-receiving surface side sealing material 12b are arranged side by side. In such a case, EVA is softened and melted by heating and pressurization under reduced pressure with a laminator, so that the transparent light-receiving surface side sealing material 12a and the colored light-receiving surface side sealing material 12b are intertwined with each other. May not be on a straight line, and the finished state may not be good. However, according to this example, the colored light-shielding portion 20b is disposed on the end portion of the light-receiving surface-side sealing material 20a that is transparent, so that the upper surface of the light-shielding portion 20b colored in the state before lamination Even when EVA is softened and melted in the laminate, the movement of the light-shielding portion 20b colored on the solar cell element 13 is blocked, and the solar cell element 13 after lamination becomes solar. When the battery panel portion is viewed from the light receiving surface portion, the boundary between the transparent light receiving surface side sealing material 20a and the colored light shielding portion 20b becomes a clean straight line, and a satisfactory finish can be achieved.

  In addition, this invention is not limited to the said embodiment, A various change, improvement, etc. do not interfere at all within the scope of the present invention.

  For example, the solar cell element is not limited to a crystalline solar cell such as single crystal or polycrystalline silicon, but can be applied to a thin film solar cell.

  Further, in this example, as shown in FIG. 2, in the rectangular solar cell element group, the light receiving surface side fillers 12b are respectively arranged in a strip shape along the opposite side, but instead of this, a rectangular shape is used. The structure which forms the frame shape corresponding to a solar cell panel of a shape may be sufficient.

It is a schematic sectional drawing which shows an example of the structure of the solar cell panel part of the solar cell module of this invention. It is a top view which shows an example of the external appearance by the side of the light-receiving surface of the solar cell module of this invention. It is another example which concerns on the solar cell module of this invention, and is a principal part enlarged view which shows the edge part of the light-receiving surface side sealing material. It is a schematic sectional drawing which shows an example of the structure of the solar cell panel part of the other solar cell module of this invention. It is a schematic sectional drawing which shows an example of the structure of the solar cell panel part of the conventional solar cell module. It is a top view which shows an example of the external appearance by the side of the light-receiving surface of the conventional solar cell module.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11 ... Translucent board | substrate 2 ... Light-receiving surface side filler 3, 13 ... Solar cell element 4, 14 ... Back surface side filler 5, 15 ... Back surface protective material 6, 16 ... Connection wires 7, 17 ... Horizontal wires 8, 18 ... Module frame 9 ... Coupling wires 12a, 12b, 20a ... Light-receiving surface side filler 20b ... Light shielding part

Claims (4)

A light-receiving surface side sealing material, a solar cell element group formed by arranging a plurality of solar cell elements, a back surface side sealing material, and a back surface protection material are sequentially laminated on the light-transmitting substrate, and each solar cell element is electrically connected. A non-transparent wiring is provided in the periphery of the solar cell element group among the wirings connected to the solar cell element group, and a light-receiving surface side sealing material portion disposed in a portion facing the solar cell element group is formed of a transparent material, A solar cell module, characterized in that a light-receiving surface side sealing material portion disposed in a portion facing a peripheral portion of a battery element group is made of a light-shielding material. 2. The light-shielding material is formed by extending a light-receiving surface side sealing material portion disposed at a portion facing the solar cell element group, and forming a light-shielding portion in the extended portion. The solar cell module described. The solar cell module according to claim 1, wherein the light shielding material is whitened or colored. After sequentially passing through the following steps (1) to (5), heating and pressurizing under reduced pressure, and forming a light-receiving surface side sealing material portion disposed in a portion facing the solar cell element group with a transparent material, A method for producing a solar cell module, wherein a light-receiving surface side sealing material portion disposed in a portion facing a peripheral portion of a solar cell element group is integrated by being made of a light shielding material.
(1) A light-receiving surface side sealing material made of a transparent material and a light-shielding material is disposed on a light-transmitting substrate.
(2) A plurality of solar cell element groups in which a plurality of solar cell elements are arranged on the light receiving surface side sealing material are arranged.
(3) While electrically connecting the said solar cell element group by wiring, non-transparent wiring is provided in the peripheral part of a solar cell element group among this wiring.
(4) A back surface side sealing material is disposed on the solar cell element group.
(5) A back surface protective material is disposed on the back surface side sealing material.

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