JP2014013876A - Solar cell module and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a solar cell module capable of preventing a sealing resin from oozing from an edge of the solar cell module during a sealing step, unlikely to be displaced, and the solar cell module unlikely to be displaced.SOLUTION: In a solar cell module in which a light-receiving side glass 6, a light-non-receiving side glass 7 and a sealing resin 82 seal a plurality of solar cells 2 electrically connected each other, a plurality of oozing prevention walls 31, 32 are arranged between edges of the light-receiving side glass 6 and the light-non-receiving side glass 7. A plurality of oozing prevention walls 31, 32 are arranged at the edge of the light-receiving side glass 6 in a solar cell module thickness direction.

Description

  The present invention relates to a solar cell module and a method for manufacturing the solar cell module, and more particularly to a solar cell module having a laminated glass structure and a method for manufacturing the solar cell module.

  There are various types of solar cell modules depending on their uses and manufacturing methods. One such solar cell module is a solar cell module having a laminated glass structure. The solar cell module provided with this laminated glass structure has a plurality of solar cells electrically connected to each other sandwiched between the light-receiving surface side glass and the non-light-receiving surface side glass, thereby sealing the solar cells inside. It has a structure. In the solar cell module provided with this laminated glass structure, sunlight that has entered the solar cell module through the light-receiving surface side glass passes through the sealing resin in the portion where no solar cells are present, and is not receiving light. Sunlight that reaches the side glass and reaches the non-light-receiving surface side glass is transmitted outside the solar cell module through the non-light-receiving surface side glass. Therefore, the solar cell module having a laminated glass structure is suitably used as a so-called daylighting solar cell module that can capture sunlight even in a space located on the non-light-receiving surface side of the solar cell module. is there.

  In the case of a solar cell using a crystalline silicon substrate, in order to prevent the solar cell from being cracked or cracked under a pressure environment in the sealing process, between the light-receiving surface side glass and the non-light-receiving surface side glass It is necessary to increase the thickness of the sealing resin layer interposed therebetween. Therefore, the thickness as a solar cell module will increase, and the exposure surface to the exterior of sealing resin in the edge part of a solar cell module will increase. As a result, there is a problem that the sealing resin is discolored due to an increase in moisture absorption of the sealing resin, and the characteristics of the solar battery cell are easily deteriorated. Furthermore, in the sealing process, there is also a problem that the sealing resin that has become softened protrudes in large quantities from the end portion of the solar cell module.

  As a method for solving such a problem, for example, Patent Document 1 discloses a frame for securing a space in which a solar cell cell array is arranged in the thickness direction of the solar cell cell array between the front surface side glass plate and the back surface side glass plate. A solar cell module including a spacer member and a manufacturing method thereof are disclosed.

JP 2008-258269 A

  However, in the structure and the manufacturing method disclosed in Patent Document 1, in the sealing step of the solar battery module, the protrusion of the sealing resin from the end of the solar battery module cannot be sufficiently stopped, and the solar battery module is positioned in the solar battery cell. There was a problem that a shift might occur.

  The present invention has been made in view of the above problems, and its purpose is to prevent the sealing resin from protruding from the end portion of the solar cell module in the sealing step, and to prevent the solar cell from being displaced. An object of the present invention is to provide a solar cell module that realizes a method for manufacturing a battery module and has a small positional deviation of solar cells.

  A solar cell module according to the present invention is a solar cell module in which a plurality of electrically connected solar cells are sealed with a light-receiving surface side glass, a non-light-receiving surface side glass, and a sealing resin. A pair of opposing end portions of the module having a protrusion preventing wall between the light receiving surface side glass and the non-light receiving surface side glass, and a plurality of the protrusion preventing walls are arranged in the thickness direction of the solar cell module It is.

  In the solar cell module according to the present invention, the protrusion prevention wall has an adhesive layer.

  In the solar cell module according to the present invention, two protrusion prevention walls are arranged in the thickness direction of the solar cell module.

  In the solar cell module according to the present invention, the protrusion prevention wall has a width of 5 mm to 10 mm.

  In the solar cell module according to the present invention, the protrusion preventing wall is disposed at any end of the solar cell module.

  In the solar cell module according to the present invention, an extraction electrode is drawn out from between adjacent protrusion prevention walls at one end of the solar cell module.

  The manufacturing method of the solar cell module according to the present invention includes a protrusion prevention wall arrangement step of arranging a plurality of protrusion prevention walls on a non-light-receiving surface of a pair of opposing ends of the light-receiving surface side glass substrate, A placing step for disposing at least the sealing resin, the plurality of solar cells, the sealing resin, and the non-light-receiving surface side glass between the protruding prevention walls, and a sealing step for sealing the solar cells. It has.

  In the method for manufacturing a solar cell module according to the present invention, a spacer is disposed outside the solar cell module at the end portion of the solar cell module in which the protrusion prevention wall is disposed in the placing step.

  In the method for manufacturing a solar cell module according to the present invention, the protrusion prevention wall has an adhesive layer.

  The solar cell module and the method for manufacturing the solar cell module according to the present invention have an effect of preventing the sealing resin from protruding from the end of the solar cell module in the sealing step and hardly causing the positional deviation of the solar cells.

BRIEF DESCRIPTION OF THE DRAWINGS It is Embodiment 1 of this invention, Comprising: It is the top view seen from the light-receiving surface side of a solar cell module. 1 shows Embodiment 1 of the present invention and is a cross-sectional view taken along line AA ′ of the solar cell module shown in FIG. 1. 1 shows Embodiment 1 of the present invention and is a cross-sectional view taken along line BB ′ of the solar cell module shown in FIG. 1. BRIEF DESCRIPTION OF THE DRAWINGS It is Embodiment 1 of this invention, Comprising: It is sectional drawing which shows the manufacturing method of a solar cell module. BRIEF DESCRIPTION OF THE DRAWINGS It is Embodiment 1 of this invention, Comprising: It is the top view seen from the light-receiving surface side of a solar cell module. 10 is a plan view showing Embodiment 2 of the present invention, as viewed from the light receiving surface side of the solar cell module. FIG. FIG. 7 shows Embodiment 2 of the present invention and is a cross-sectional view of the solar cell module shown in FIG. 6 viewed from the C direction.

  The solar cell module and the method for manufacturing the solar cell module of the present invention will be described below with reference to the drawings.

Embodiment 1
FIG. 1 is a plan view showing the structure of the solar cell module of Embodiment 1 as seen from the light receiving surface side. The light receiving surface is a surface on the side where the solar battery cell receives light in order to convert light energy into electric power.

  In order to obtain sufficient output power as the solar cell module 100, a solar cell string 5 is configured by electrically connecting a plurality of solar cells 2 in series using the internal wiring 4, and further, a plurality of solar cell strings 5 was electrically connected.

  The solar cell module 100 is quadrangular when viewed from the light receiving surface side, and has two sets of opposed end portions. The protrusion prevention wall 3 was disposed at a pair of opposed end portions of the solar cell module 100 that are substantially parallel to the internal wiring 4 constituting the solar cell string 5. The protrusion prevention wall 3 is an elongated, substantially rectangular parallelepiped, and has a length that covers the end of the solar cell module. As the solar battery cell 2, a solar battery cell using a substantially rectangular single crystal silicon substrate having a side length of about 156 mm was used. The thickness of the single crystal silicon substrate is about 200 μm. In the present embodiment, a solar cell using a single crystal silicon substrate is used, but a solar cell using a polycrystalline silicon substrate may be used.

  The solar cell module 100 has two extraction electrodes 41 on the positive electrode side and the negative electrode side. Although not shown in the figure, the end of the extraction electrode is connected to the terminal box.

  In order to obtain daylighting, the distance between the solar battery cells was about 15 mm, and the distance between the solar battery cell and the end of the solar battery module was about 50 mm. Each distance does not need to be limited to this value, and can be changed according to the design of the solar cell module.

  2 is a cross-sectional view taken along the line AA ′ in the drawing of the solar cell module shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB ′.

  As shown in FIG. 2, the solar cell module 100 seals a plurality of electrically connected solar cells 2 with a sealing resin 8 between a light receiving surface side glass 6 and a non-light receiving surface side glass 7. The structure was as follows. Each solar cell 2 has an internal wiring 4 on each of the light receiving surface side and the non-light receiving surface side. The protrusion prevention wall 3 was disposed between the light-receiving surface side glass 6 and the non-light-receiving surface side glass 7 at a pair of opposed end portions of the solar cell module 100. The protrusion prevention wall 3 is formed by arranging two protrusion prevention walls of the light receiving surface side protrusion prevention wall 31 and the non-light receiving surface side protrusion prevention wall 32 in the thickness direction of the solar cell module 100. A foam made of an acrylic resin was used as an overflow prevention wall. The resin is not limited to acrylic resin, and urethane resin, silicone resin, and butyl rubber may be used. Moreover, it is not limited to a foam. The light receiving surface side protrusion prevention wall 31 has adhesive layers 311 and 312, and the adhesive layer 311 is bonded to the non-light receiving surface side of the light receiving surface side glass 6. The non-light-receiving surface side protrusion prevention wall 32 has adhesive layers 321 and 322, and the adhesive layer 322 is bonded to the light-receiving surface side of the non-light-receiving surface glass 7. Further, the adhesive layer 312 is bonded to the adhesive layer 321. By providing an adhesive layer on the anti-extrusion wall, it is possible to increase the adhesion between the glass and the anti-extrusion wall compared to the case without an adhesive layer, and it is possible to prevent displacement of the anti-extrusion wall. became.

  The width t of the protrusion preventing wall 3 was about 9 mm. The width t is preferably 5 mm or more and 10 mm or less. The protrusion prevention wall has a function of preventing the sealing resin 8 from protruding from the end of the solar cell module in the sealing step. When the width t is smaller than 5 mm, it does not have a sufficient protrusion prevention function, so that it is preferably 5 mm or more. Moreover, since the area | region with a protrusion prevention wall becomes an area | region which does not contribute to electric power generation, if the width is too wide, the electric power generation efficiency of a solar cell module will not become large. Furthermore, in the case of the daylighting type solar cell module, the region having the protrusion prevention wall is a region that does not contribute to the daylighting, so that the daylighting rate does not increase. Therefore, it is not desirable to make the width t too large. Furthermore, the daylighting solar cell module is often used as a building window. When used as a window, it is desirable from the viewpoint of design that the protrusion prevention wall at the end of the solar cell module is hidden by a window sash. For this reason, the width t is desirably 10 mm or less.

  EVA (ethylene vinyl acetate resin) was used as the sealing resin 8. The sealing resin is desirably a resin having a high transmittance in the visible light region. Resins such as ionomer resins and olefin resins can also be used.

  As the light-receiving surface side glass 6 and the non-light-receiving surface side glass 7, tempered glass having a thickness of about 4 mm was used. The thickness of the glass is not limited to 4 mm, and double tempered glass, untempered glass, or the like may be used.

  In addition, as shown in FIG. 3, when viewed in a cross section along the line BB ′, adjacent solar cells 2 are connected in series by internal wiring 4. The protrusion prevention wall is not disposed at one end of the solar cell module 100 in a direction orthogonal to a direction in which a plurality of solar cells constituting the solar cell string are connected.

  Next, the manufacturing method of the solar cell module of Embodiment 1 is demonstrated.

  FIG. 4 is a cross-sectional view for explaining the method for manufacturing the solar cell module according to the first embodiment. 4 (a), 4 (b), and 4 (c) show the protrusion prevention wall arranging step, the placing step, and the sealing step, respectively, and correspond to the cross section along the line AA ′ in FIG. To do.

  First, a plurality of solar cells were electrically connected in series with internal wiring to form a solar cell string. As the internal wiring, a tin-plated copper wire having a thickness of about 0.2 mm was used. Soldering was used for the connection between the solar cell and the internal wiring. You may connect with an electrically conductive paste. Thereafter, a plurality of solar cell strings were electrically connected. A connection member having a thickness of about 0.2 mm was used to connect the plurality of solar cell strings.

  With reference to FIG. 4A, the protrusion preventing wall arranging step will be described. On the non-light-receiving surface side of a pair of opposing ends of the light-receiving surface side glass 6, the light-receiving surface side protrusion prevention wall 31 and the non-light-receiving surface side protrusion prevention wall 32 are placed in this order. It is desirable that the number of the overhang prevention walls arranged in a stack is two. This is because the manufacturing process is not complicated. Both the light receiving surface side protrusion preventing wall 31 and the non-light receiving surface side protrusion preventing wall 32 were made of an acrylic resin foam having an adhesive layer. Since the light-receiving surface side protrusion prevention wall 31 has an adhesive layer, it is difficult to be displaced when it is disposed on the non-light-receiving surface side of the light-receiving surface side glass 6 and can be disposed at an accurate location. Further, the same effect was obtained when the non-light receiving surface side protrusion preventing wall 32 was disposed on the light receiving surface side protrusion preventing wall 31. In addition, it is possible to prevent the protrusion prevention wall from moving and causing a position shift when transporting to the next step.

  Next, the mounting process was performed. The mounting process will be described with reference to FIG.

  A sealing resin 81 is disposed between the protrusion-preventing walls disposed on the non-light-receiving surface side of a pair of opposed end portions of the light-receiving surface side glass 6, and the solar battery cell 2 is placed on the sealing resin 81. Were placed in an electrically connected state. A sealing resin 82 and a non-light-receiving surface side glass 7 were disposed on the solar battery cell 2. Both of the sealing resins 81 and 82 used sheet-like EVA. The sheet-like EVA used as the sealing resin 81 may be one sheet or a plurality of sheets. The same applies to the sealing resin 82. What is necessary is just to determine according to the design value of the distance between the light-receiving surface side glass 6 and the non-light-receiving surface side glass 7. FIG. When sealing solar cells using a silicon substrate, it is necessary to securely bury the solar cells and internal wiring, so the distance between the glass on the light-receiving surface side and the non-light-receiving surface side is the same as that of the thin-film silicon solar cell. It is necessary to make it larger in comparison.

  In the protrusion prevention wall arrangement step, the protrusion prevention wall is disposed at the opposite end of the light receiving surface side glass 6, so that the sealing resin can be disposed at an accurate location. In addition, the sheet-like EVA used as the sealing resin had a low adhesiveness with the glass before heating, and thus the positional deviation was likely to occur after the placement. The effect that it becomes difficult to occur was also obtained.

  Furthermore, temporary fixing between the light-receiving surface side glass 6 and the non-light-receiving surface side glass 7 can be performed through the protrusion prevention wall. Up to now, when the solar cell module is transported to the next sealing step, there has been a problem that misalignment is likely to occur between the light receiving surface side glass and the sealing resin, and between the sealing resin and the non-light receiving surface side glass. However, it has become possible to prevent misalignment during transportation by disposing the protruding prevention wall having adhesiveness at the opposite end of the solar cell module.

  Next, the spacer 9 was arrange | positioned on each outer side of a pair of opposing edge part which has arrange | positioned the protrusion prevention wall of a solar cell module. The spacer 9 was a substantially rectangular parallelepiped made of silicone resin. The material of the spacer 9 is not limited to silicone resin, and Teflon (registered trademark), epoxy, glass, metal, or the like can be used. Moreover, the composite of these materials may be sufficient. For example, you may use the spacer which covered the substantially rectangular parallelepiped copper with the silicone resin. By adopting a structure using copper, it is possible to secure a sufficient weight as a spacer at a low cost. Further, by covering with the silicone resin, even when the light receiving surface side glass 6 or the non-light receiving surface side glass 7 and the spacer 9 are in contact with each other, the glass is not damaged, and the production yield can be improved. Moreover, it is good also as a spacer using the material which mixed the glass fiber in the epoxy. By mixing glass fiber with epoxy, it becomes possible to give the spacer strength, and it can be used repeatedly in the sealing process.

  The spacer is not necessarily in contact with the end portion of the solar cell module, and may be arranged such that the solar cell module and the spacer are several millimeters apart, for example.

  Next, a sealing process is demonstrated using FIG.4 (c). Using a laminator device, which is a sealing device, the solar cell module was sealed while being heated.

  First, the solar cell module and the spacer 9 placed in the placing step were placed on the heater plate heated to 155 ° C. of the laminator device with the light receiving surface side facing down. Since the sealing resin was thick, the heating temperature was set high.

  After loading, the upper chamber and lower chamber of the laminator device were depressurized at the same pressure. By this operation, air was removed from each joint surface, and bubbles contained in the sealing resin 8 were removed. The depressurization was performed for a long time as compared with the case where no protrusion prevention wall was arranged. Even when the protrusion prevention wall was arranged, it was possible to remove air from each joint surface and remove bubbles contained in the sealing resin. This is presumed to be because the adhesive layer of the protrusion prevention wall has air permeability. When there is one protrusion preventing wall disposed at one end of the solar cell module, the adhesive layer is composed of two layers: a layer that adheres to the light receiving surface side glass 6 and a layer that adheres to the non-light receiving surface side glass. It is presumed that the number of adhesive layers is increased and pressure reduction is facilitated by arranging the protrusion prevention walls in an overlapping manner.

  Thereafter, the upper chamber is returned to the atmosphere, pressurized to 1 atm, and maintained in a pressurized state, whereby the adhesion between the light-receiving surface side glass 6 and the non-light-receiving surface side glass 7 through the sealing resin 8 is maintained. Improved.

  A curing step may be added after the sealing step. The curing step is a step required when EVA is used as the sealing resin, and is a step of stabilizing the sealing state by advancing the EVA crosslinking reaction. The curing step may be performed using a heat treatment apparatus, or a method of increasing the heating time while being placed on the laminating apparatus.

  Next, a sample for comparison was created and the effect was confirmed. FIG. 5 shows a diagram for explanation. It is the top view which looked at the solar cell module from the light-receiving surface side.

  The solar cell module manufactured using this embodiment is used as an example, and samples prepared for comparison are referred to as comparative example 1 and comparative example 2. The difference between Example and Comparative Example 1 is that Comparative Example 1 was not provided with a spacer. The difference between Example and Comparative Example 2 is that Comparative Example 2 was not provided with any protrusion prevention wall or spacer.

  Among a plurality of solar cells constituting the solar cell string closest to the end of the solar cell module, the distance between the solar cell 21 at one end and the end of the light receiving surface side glass substrate is L1, and the solar cell at the other end The distance between 22 and the edge of the light-receiving surface side glass was L2. Furthermore, the distance between the solar battery cell 23 in the central part of the solar battery cell constituting the solar battery string and the end of the light receiving surface side glass is L3.

  In order to confirm whether or not the position of the solar battery cell is shifted before and after the sealing step, the lengths of L1, L2, and L3 before the sealing step and the lengths of L1, L2, and L3 after the sealing step are measured. Then, each difference was calculated. The measurement was performed using a caliper.

  In Examples, the lengths of L1, L2, and L3 were almost the same before and after the sealing step. In other words, in the example, the solar cell string was hardly bent. In Comparative Example 1, the lengths of L1 and L2 were almost the same, but L3 was slightly longer. In other words, in Comparative Example 1, slight bending occurred in the solar cell string. In Comparative Example 2, the lengths of L1 and L2 hardly changed, but L3 became longer. In other words, in Comparative Example 2, the solar cell string was bent more than in Comparative Example 1. When Example and Comparative Example 1 are compared with Comparative Example 2, since only Comparative Example 2 has no protrusion prevention wall, when there is no protrusion prevention wall, the solar cell string bends and the position of the solar cell greatly deviates. It can be seen that occurred. This is considered to be because when the sealing resin is in a softened state, the sealing resin protrudes from the end of the solar cell module, and at the same time, the flow also occurs inside, and the position of the solar cell is changed.

  In the sealing process, when the solar battery cell is positioned, the design property of the solar battery module is deteriorated. Moreover, local bending arises in the internal wiring which has connected adjacent photovoltaic cells, when positioning arises in a photovoltaic cell. If there is a local bend in the internal wiring, when repeated temperature changes are applied to the solar cell module, the internal wiring may crack at the bend. That is, when the solar cell module in which the solar cell is positioned is used outdoors for a long time, the internal wiring may be disconnected. By disposing the protrusion prevention wall, it is possible to prevent the solar cells from being positioned in the sealing process, to ensure high designability, and to ensure the long-term reliability of the solar cell module.

  Moreover, in order to prevent the positioning of the solar cells in the sealing process, there is a case where a fixing tape is applied between the solar cells. When a solar cell module using a fixing tape is installed outdoors for a long period of time, the fixing tape may deteriorate due to sunlight and turn yellow. In the case of a solar cell module having a laminated glass structure, yellowing of the fixing tape leads to a decrease in the design properties of the solar cell module. According to the present invention, since it is possible to prevent the positioning of the solar battery cell without using a fixing tape, it is possible to ensure high designability over a long period of time for the solar battery module having a laminated glass structure. It also has the effect.

  Further, comparing the example and the comparative example 1, it can be seen that the position of the solar battery cell is slightly changed if there is no spacer even if there is a protrusion prevention wall. In other words, it can be seen that the spacer also has an effect of preventing the position of the solar battery cell from changing. This is presumably because the change in the thickness direction of the solar cell module was suppressed by arranging the spacer, and the flow of the sealing resin could be suppressed. That is, in the example shown in this embodiment, it is presumed that the displacement of the solar battery cell can be prevented with higher accuracy by arranging the protrusion prevention wall and the spacer.

  Next, in Example, Comparative Example 1, and Comparative Example 2, the thickness measurement of the solar cell module was performed using calipers after sealing, and the thickness distribution was calculated. Thickness measurement was performed at a location that entered the central portion of about 10 mm from the end at a total of 8 locations, 4 corners of the solar cell module and 4 central portions of each side.

  In the examples, there was almost no thickness distribution, but in Comparative Examples 1 and 2, a distribution occurred. From these results, it can be understood that the distribution of the thickness of the solar cell module can be prevented in the sealing step by arranging the spacer. More specifically, the thickness distribution in Comparative Example 2 was larger than that in Comparative Example 1. Arranging the anti-extrusion wall is also considered to have an effect of preventing the thickness distribution.

  In the present embodiment, the structure in which two protrusion prevention walls are arranged in an overlapping manner has been described. However, the present invention is not limited to two, and includes three or more cases. It is presumed that the decompression time in the sealing process can be shortened by increasing the number of overhanging prevention walls.

  Further, the number of solar cells constituting the solar cell string and the number of solar cell strings constituting the solar cell module are not limited to the numbers shown in the present embodiment, and may be designed as necessary. .

[Embodiment 2]
Another example of the present invention will be described using the second embodiment. The difference between the second embodiment and the first embodiment is that the protruding prevention walls are arranged at all end portions of the solar cell module.

  FIG. 6 is a plan view of the solar cell module manufactured according to the present embodiment as viewed from the light receiving surface side. The protrusion prevention wall 3 was disposed at any end of the solar cell module 110.

  FIG. 7 is a cross-sectional view of the solar cell module 110 shown in FIG. 6 as viewed from the C direction. As the protrusion prevention wall 3, two protrusion prevention walls were overlapped and arranged. The extraction electrode is extracted from between the two protrusion prevention walls. By pulling out from between the protrusion preventing walls, the lead electrode can be pulled out almost parallel to the light receiving surface side and non-light receiving surface side glass without bending at the end. The portion not related to the electrical connection of the extraction electrode with the solar battery cell may be covered. More specifically, it is desirable to cover from the end of the light receiving surface side glass or the non-light receiving surface side glass to about 3 mm on the outside (side without the sealing resin). When the extraction electrode has such a structure, bending at the end of the light-receiving surface side glass or the non-light-receiving surface side glass is less likely to occur. This is because the thickness of the extraction electrode is increased by the coating.

  Next, the manufacturing method of the solar cell module according to the second embodiment will be described with respect to differences from the first embodiment.

  In the protrusion prevention wall arrangement step shown in FIG. 4A, only the light receiving surface side protrusion prevention wall 31 is arranged at the end portion where the extraction electrode is taken out, and the non-light reception surface side is not arranged with the protrusion prevention wall 32. For the three end portions other than the end portion from which the extraction electrode is taken out, the non-light-receiving surface side protrusion prevention wall is placed on the light-receiving surface side protrusion prevention wall.

  Next, in the placing step shown in FIG. 4B, the order of placing the end portions where the extraction electrodes are taken out will be described.

  After arranging the sealing resin 81, when arranging the solar cells, the extraction electrode 41 was arranged on the light receiving surface side protrusion preventing wall 31 arranged in the protrusion preventing wall arranging step. Thereafter, the non-light-receiving surface side protrusion prevention wall 32 is arranged so that the extraction electrode 41 is sandwiched between the light-receiving surface side protrusion prevention wall 31 and the non-light-receiving surface side protrusion prevention wall 32. Since the light-receiving surface side protrusion prevention wall 31 and the non-light-receiving surface side protrusion prevention wall are bonded to each other by the adhesive layer, there is almost no gap around the extraction electrode 41.

  Thereafter, sealing resin 82 and non-light-receiving surface side glass 7 were disposed.

  By disposing the protrusion prevention walls at all ends of the solar cell module, the positional deviation of the solar cells hardly occurred, and the position accuracy was further improved. It can be said that the design of the solar cell module has been further improved. In addition, the sealing resin does not protrude from any end of the solar cell module, and it is no longer necessary to peel off the sealing resin protruding from the end in the manufacturing process, thereby reducing the number of steps.

  Furthermore, when manufacturing the solar cell module of this embodiment, the spacer was arrange | positioned in any edge part of a solar cell module in the protrusion prevention wall arrangement | positioning process and the sealing process. By arranging the spacer at any end of the solar cell module, the uniformity in the thickness direction of the solar cell module was further improved.

  As the spacer, a frame-like spacer that can be disposed at one end on any end of the solar cell module was used. In the case where the spacers are separated, the positional deviation between the solar cell module and the spacer is liable to occur when transporting using the conveyor, so it is necessary to use an auxiliary member for transporting. By using the frame-shaped spacer, the solar cell module can be transported without using an auxiliary member when transporting the solar cell module from the protrusion preventing wall arranging step to the sealing step using a conveyor.

  In the present embodiment, the case where the extraction electrode 41 is pulled out from the end of the solar cell module has been described. However, a method of pulling out the extraction electrode from another place to the outside of the solar cell module may be used. As an example, a method can be used in which a hole is formed in the non-light-receiving surface side glass 7 and drawn out from the hole to the non-light-receiving surface side of the solar cell module.

  As mentioned above, although Embodiment 1 and Embodiment 2 were concretely demonstrated, this invention is not limited to them. Embodiments obtained by appropriately combining the technical means disclosed in the two embodiments described above are also included in the technical scope of the present invention.

  The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be widely applied to solar cell modules and methods for manufacturing solar cell modules in general.

DESCRIPTION OF SYMBOLS 100,110 Solar cell module 2, 21, 22, 23 Solar cell 3 Overflow prevention wall 31 Light reception surface side protrusion prevention wall 32 Non-light reception surface side protrusion prevention wall 4 Internal wiring 41 Lead electrode 5 Solar cell string 6 Light reception surface side glass 7 Non-light-receiving surface side glass 8, 81, 82 Sealing resin 9 Spacer

Claims (9)

A solar cell module in which a plurality of solar cells connected electrically are sealed with a light-receiving surface side glass, a non-light-receiving surface side glass, and a sealing resin,
A pair of opposing end portions of the solar cell module having a protrusion preventing wall between the light receiving surface side glass and the non-light receiving surface side glass;
A plurality of the protrusion prevention walls are arranged in the thickness direction of the solar cell module.   The solar cell module according to claim 1, wherein the protrusion prevention wall has an adhesive layer.   3. The solar cell module according to claim 1, wherein two protrusion prevention walls are arranged in a thickness direction of the solar cell module.   The solar cell module according to any one of claims 1 to 3, wherein a width of the protrusion preventing wall is 5 mm to 10 mm.   The solar cell module according to any one of claims 1 to 4, wherein the protrusion preventing wall is disposed at any end of the solar cell module. At one end of the solar cell module,
The solar cell module according to any one of claims 1 to 5, wherein an extraction electrode is extracted from between the adjacent protrusion prevention walls. A protrusion prevention wall arrangement step of arranging a plurality of protrusion prevention walls on the non-light-receiving surface of a pair of opposing ends of the light receiving surface side glass substrate;
A placement step of placing at least a sealing resin, a plurality of solar cells, a sealing resin, and a non-light-receiving surface side glass between the protruding prevention walls disposed facing each other,
The manufacturing method of the solar cell module which has a sealing process which seals the said photovoltaic cell.   The manufacturing method of the solar cell module according to claim 7, wherein a spacer is disposed outside the solar cell module at an end portion of the solar cell module in which the protrusion prevention wall is disposed in the placing step.   The method of manufacturing a solar cell module according to claim 7 or 8, wherein the protrusion prevention wall has an adhesive layer.