JP2010165750A - Solar cell module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a solar cell module that reduces screwing work, positioning adjustment work in assembling, and simplifies assembly work. <P>SOLUTION: The solar cell module includes a solar battery panel on which two or more solar cells are placed side by side and a frame 2 that encloses the four-side peripheral edges of the solar battery panel. The frame 2 is made up by folding a lengthy member having the length of the solar battery panel's four sides in conformity with the length of the panel's four sides. The frame 2 acts as a protective member for protecting the four-side edges of the solar battery panel, and a panel supporting structure for supporting the weight of the solar battery panel is separately provided on the backside of the solar battery panel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a frame structure of a solar battery module including a solar battery panel provided with a plurality of solar battery cells and a frame surrounding a peripheral edge of four sides of the solar battery panel.

  In a conventional solar cell module, cells and wiring are formed, and the periphery of a glass substrate on which a back sheet that protects the element surface with a back sheet is adhered is sealed with a metal foil or resin, and surrounded by an aluminum frame. A structure that prevents moisture from entering is known.

  For example, a frame having a substantially U-shaped cross-sectional opening is fitted and fixed to the peripheral edge of the solar cell panel. Furthermore, a structure has been proposed in which adjacent frames are connected to each other using a fixing bracket at the frame end (see, for example, Patent Document 1).

  Further, as a frameless solar cell module and its construction method, the back surface of the outer edge portion of the solar cell module is fixed to a frame by an adhesive means such as a magic fastener, and a cover member having an H-shaped cross section is provided between adjacent frameless solar cell modules. A structure for protection has been proposed (see, for example, Patent Document 2).

  Furthermore, in order to facilitate the installation and fixing work, a structure of a solar cell module in which a metal reinforcing plate is provided on the side opposite to the light receiving surface and a support member is attached to the metal reinforcing plate has been proposed (for example, see Patent Document 3).

Japanese Patent Laid-Open No. 2002-314113 (1 page, FIG. 1) Japanese Patent Laid-Open No. 10-231600 (FIG. 1) Japanese Patent Laid-Open No. 10-54118 (FIG. 1)

  In the solar cell module as described above, the portion to be inserted into the frame of the solar cell panel is enlarged for the purpose of preventing the solar cell panel from falling off the frame. As a result, in the peripheral region of the solar cell module light-receiving surface, there is a problem that the light receiving area is reduced due to light shielding by insertion into the frame and power generation efficiency is reduced.

  In addition, even if it is a frameless structure, if the method of surrounding the outer periphery of the solar cell module with a frame when attaching to the gantry, a light receiving invalid area similar to the case where the frame is fitted is required to prevent falling off. There was a problem.

  Furthermore, in the method of fixing by the back surface as in the third example, the solar cell module itself is reinforced with a metal reinforcing plate, which causes a problem of cost increase.

  The present invention has been made to solve the above-described problems, and has a structure in which a force for dropping the solar cell panel from the frame does not act, and the frame has an outer edge of the solar cell panel. The unit has only a protective function to prevent damage during transportation and installation, and a rib (support member) bonded to the side opposite to the light receiving surface of the solar cell module is separately provided so that it can be attached to a stand or the like. Furthermore, it aims at obtaining the solar cell module of the rib support structure with a frame which reduces the light-shielding area | region by the flame | frame of the solar cell module light-receiving surface which leads to the fall of power generation efficiency.

  In order to solve the above-described problems and achieve the object, a solar battery module according to the present invention includes a solar battery panel provided with a plurality of solar battery cells, and a frame surrounding the peripheral edges of the solar battery panel. The frame is prepared by bending a long member having a length corresponding to four sides of the solar cell panel in accordance with the four sides of the solar cell panel.

  In addition, another solar cell module according to the present invention includes a solar cell panel provided with a plurality of solar cells, and a frame that surrounds the periphery of the four sides of the solar cell panel, and the frame includes four sides of the solar cell panel. The minute frame part is produced by being integrally connected by molding.

  Furthermore, the frame functions as a protective member that protects the peripheral edges of the four sides of the solar cell panel, and a panel support structure that supports the load of the solar cell panel is provided on the back surface of the solar cell panel.

  According to this invention, the frame is produced by bending a long member having a length corresponding to the four sides of the solar cell panel along the four sides of the solar cell panel. Reduced to one location. As a result, the amount of screwing work can be reduced and the positioning work during assembly can be reduced, and the assembly work can be simplified.

  In addition, according to the present invention, the frame is manufactured by integrally connecting the frame portions for the four sides of the solar cell panel by molding, so that the number of connection points of the frame is reduced from the conventional four to one. The amount of screwing work and the positioning work during assembly can be reduced, the assembly work can be simplified, and the use of a polymer material as the frame material reduces the weight of the solar cell module. Can also be planned.

  Further, according to the present invention, the frame functions as a protective member that protects the peripheral edges of the four sides of the solar cell panel, and the rib is provided on the back surface of the solar cell panel as a panel support structure that supports the load of the solar cell panel. . By supporting the load of the solar cell panel with the panel support structure arranged on the back side, the load surrounding the four sides of the solar cell panel and the wind pressure do not act on the frame, so the frame is strong. There is no need to be, and the frame can be made narrow. Thereby, the part which shields the light-receiving surface of a photovoltaic cell can be decreased, and high efficiency can be achieved. In addition, since the frame can be integrated, the mounting position accuracy is improved and the assembly work can be made efficient.

Embodiment 1 FIG.
FIG. 1 is a perspective view of the solar cell module according to Embodiment 1 of the present invention as viewed from the light receiving surface side. FIG. 2 is a perspective view seen from the back side of the solar cell module according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view for explaining the laminated structure of the solar cell panel.

  The solar cell module 100 according to the present embodiment includes a flat plate solar cell panel 1 provided with a plurality of solar cells, and a frame 2 that surrounds the periphery of the four sides of the solar cell panel 1. Furthermore, the solar cell panel 1 includes a translucent substrate 11 in which a plurality of solar cell elements are formed on a base material such as glass to constitute a solar cell, and an adhesive layer 12 on the back surface of the translucent substrate 11. It is comprised from the back sheet 13 bonded together. The adhesive layer 12 is formed by applying an adhesive such as EVA (ethylene vinyl acetate) resin. The back sheet 13 is a sheet having low moisture permeability and weather resistance such as a film such as PET (polyethylene terephthalate) or an aluminum foil, and protects the back surface of the solar cell panel 1.

  A plurality of solar cells formed on the translucent substrate 11 are connected in series / parallel to constitute a solar cell group (not shown). On the back surface of the solar battery panel 1, in order to take out output from the solar battery cell group, two bus bar wirings 14 serving as positive and negative electrodes are formed on the solar battery cell or in the vicinity thereof as take-out electrodes.

  Further, terminal boxes 5 are provided on the back sheet 13 at positions corresponding to the two bus bar wires 14. A collection wiring 15 extending from the bus bar wiring 14 is electrically connected to an external cable for output extraction via the terminal box 5. The inside of the terminal box 5 and the attachment interface between the terminal box 5 and the back sheet 13 are sealed for insulation as necessary. Here, the wiring is made to the single-pole terminal box 5 via the collecting wiring 15 connected to the two bus bar wirings 14 which are both positive and negative. However, the positive and negative electrodes can be formed by one terminal box. Here, the terminal box 5 is fixed to the back sheet 13 using a silicon-based adhesive.

  FIG. 4 is a perspective view showing how the frame is attached to the solar cell panel. FIG. 5 is a cross-sectional view taken along the line EE in FIG. 2 showing the internal structure of the solar cell module. The solar cell panel 1 has a substantially rectangular flat plate shape, and has two short sides A and C and two long sides B and D. The frame 2 surrounding the peripheral edges of the solar cell panel 1 is made of an aluminum plate, and the long members having lengths corresponding to the four sides A, B, C, and D of the solar cell panel 1 are the four sides of the solar cell panel 1. It is made by bending to match.

  The frame 2 includes a first frame portion 2A, a second frame portion 2B, a third frame portion 2C, and a fourth frame portion 2D, which are portions corresponding to the four sides A, B, C, and D of the solar cell panel 1. Each frame portion has a U-shaped cross-section, and extends inward from the front end of the main body frame 2a and the main body frame 2a facing the outer peripheral side surface of the solar cell panel 1, respectively. The front frame 2b is opposed to the front surface of the main body frame 2a, and the back frame 2c extends inward from the rear surface end of the main body frame 2a and faces the rear surface of the solar cell panel 1. The main body frame 2 a, the front frame 2 b, and the back frame 2 c constitute an enclosure that surrounds the peripheral edge of the solar cell panel 1. The length of each frame part 2A, 2B, 2C, 2D is a length that is several mm longer than the length of the corresponding four sides A, B, C, D of the solar cell panel 1 in consideration of the clearance at the time of bending. ing.

  And between the main body frames 2a of the adjacent frame portions, a first folding groove 16b is engraved so as to be easily folded so as to overlap the folding line. Also, between the front frame 2b and the back frame 2c of the adjacent frame portions, the front frame 2b or the back frame 2c are not overlapped with each other and a gap is not left when bent at a right angle. A corner notch 16a, which is a degree notch, is formed. The frame 2 having such a configuration is bent around the position of the first bending groove 16b and arranged around the solar cell panel 1, and the end portions butted together are screwed or fitted together at one corner portion. Are mechanically connected by.

  The frame 2 arranged in this way is fixed to the peripheral portion of the solar cell panel 1 with an adhesive layer 6 arranged between the main body frame 2a and the outer peripheral side surface of the solar cell panel 1 in the surrounding portion. ing. That is, the frame 2 is fixed to the peripheral edge portion of the solar cell panel 1 with the adhesive layer 6 sandwiched between the main body frame 2a and the solar cell panel 1 in the surrounding portion. With respect to this adhesive layer 6, the structural strength function for holding the frame 2 and the solar cell panel 1 is not necessary, but it is necessary to ensure end face protection and long-term reliability of the solar cell panel 1 during transportation and installation. Therefore, a material having elasticity and low moisture permeability is used. For example, when a double-sided tape-like material in which a cushioning material such as a foamed resin, a moisture-proof material in which PET and aluminum foil are laminated, and an acrylic adhesive is used is used as the material, water bonding (on the surface of the double-sided tape-like adhesive) Water is applied and placed in the frame 2, the solar cell panel 1 is slid into the frame 2 using water as a lubricant, and then the water is evaporated to restore the adhesive's tackiness and fix it) The frame 2 and the solar cell panel 1 can be easily bonded by the method, and the assembling workability is also improved. Thus, the outer edge part of the solar cell panel 1 and the frame 2 are connected using the adhesive layer (double-sided tape-like adhesive) 6, and between the solar cell panel 1 and the front frame 2 b and between the solar cell panel 1 and Since gaps are respectively formed between the rear frame 2c and the sealing agent 7 is injected into the gaps.

FIG. 6 is a partial cross-sectional view showing a panel support structure provided on the back surface of the solar cell panel.
As described above, the frame 2 has only a function as a protective member that protects the peripheral edges of the four sides of the solar cell panel 1. A panel support structure that supports the load of the solar cell panel 1 is provided on the back surface of the solar cell panel 1 separately from the frame 2. This panel support structure extends substantially over the entire length of the solar cell panel 1 in the first direction (the Y-axis direction in FIGS. 1 and 2) on the back surface of the solar cell panel 1, and is orthogonal to the first direction. It is composed of a plurality of ribs 3 provided with a predetermined interval in two directions (X-axis direction in FIGS. 1 and 2). The rib 3 supports the solar cell panel 1 and fixes the solar cell panel 1 to a gantry (not shown).

  The rib 3 is made by bending an aluminum plate, and is formed into a crank shape in cross section so as to stably support the solar cell panel 1 on the gantry and to have a predetermined rigidity for supporting the load of the solar cell panel 1. Yes. In addition, regarding the cross-sectional shape, if it includes at least a U-shaped portion even if it is not a crank shape, a predetermined rigidity is given to a shearing load and a bending load acting via the solar cell panel 1. be able to. The rib 3 having such a structure is sandwiched between the flat portion and the solar cell panel 1 so that the flat portion formed at the center portion of the crank section is pressed against the back surface of the solar cell panel 1. Further, it is fixed to the solar cell panel 1 with an epoxy, silicon or butyl structural adhesive 8. In addition, when fixing the rib 3 to the back sheet | seat 13, you may use an acrylic type double-sided adhesive tape for positioning and initial fixation.

  According to the present embodiment, the frame 2 is manufactured by bending a long member having a length corresponding to the four sides of the solar cell panel 1 along the four sides of the solar cell panel 1, so that the connecting portion of the frame is The conventional four locations are reduced to one location. As a result, the amount of screwing work can be reduced and the positioning work during assembly can be reduced, and the assembly work can be simplified.

  Moreover, according to this Embodiment, the flame | frame 2 functions as a protective member which protects the four-side periphery part of the solar cell panel 1, and the rib 3 is a solar cell panel 1 as a panel support structure which supports the load of the solar cell panel 1. It is provided on the back side. By supporting the load of the solar cell panel 1 with the panel support structure arranged on the back surface, the load and wind pressure during snowfall do not act on the frame 2 surrounding the peripheral edge of the solar cell panel 1. It is not necessary to be strong, and the frame 2 can be made narrow. Thereby, the part which shields the light-receiving surface of a photovoltaic cell can be decreased, and high efficiency can be achieved. Further, since the frame 2 can be integrated, the mounting position accuracy is improved and the assembly work can be made efficient.

  Furthermore, according to the present embodiment, the frame 2 has a U-shaped enclosure portion that surrounds the peripheral edge portion of the solar cell panel 1, and the frame 2 is connected to the main body frame 2 a and the sun in the enclosure portion. Since the adhesive layer 6 sandwiched between the battery panel 1 is fixed to the periphery of the solar cell panel 1, the frame 2 and the solar cell panel 1 can be attached with water, and hot melt resin can be used. A heating device or the like necessary for use can be eliminated, and the frame 2 can be easily assembled, so that the assembling work can be simplified.

  Furthermore, according to the present embodiment, the panel support structure extends in the first direction on the back surface of the solar cell panel 1 in the first direction over substantially the entire length of the solar cell panel 1 and is orthogonal to the first direction. A plurality of ribs 3 are provided in the direction of 2 with a predetermined interval. By configuring the panel support structure with a plurality of ribs extending in the first direction on the back surface of the solar cell panel 1, it is possible to reliably and easily realize the panel support structure that supports the load of the solar cell panel 1. it can.

  Furthermore, according to the present embodiment, the rib 3 has at least a U-shaped portion in the cross-sectional shape, so that a predetermined rigidity for supporting the load of the solar cell panel 1 is realized with a simple structure. It is possible to reduce the cost. Furthermore, since the frame 2 and the rib 3 are produced by bending a sheet metal, the production is easy and further cost reduction can be achieved.

  In addition, although the solar cell panel 1 of this Embodiment comprises a substantially rectangular flat plate shape, of course, a square flat plate shape may be sufficient.

Embodiment 2. FIG.
FIG. 7 is a cross-sectional view taken along line EE in FIG. 2 showing the internal structure of the solar cell module according to Embodiment 2 of the present invention. In the first embodiment, the adhesive layer 6 is provided between the solar cell panel 1 and the main body frame 2a. However, the adhesive layer 6B of the present embodiment is in addition to that of the first embodiment. The solar cell panel 1 and the back frame 2c are also provided. That is, the adhesive layer 6 </ b> B is also disposed between the back frame 2 c and the back sheet 13. Other configurations are the same as those of the first embodiment.

  According to the present embodiment, the frame 2 is a solar cell with an adhesive layer 6B sandwiched between the main body frame 2a and the solar cell panel 1 and between the back frame 2c and the solar cell panel 1 in the surrounding portion. Since the frame 2 and the solar cell panel 1 are easily assembled to each other because the frame 2 and the solar cell panel 1 are fixed to each other, the assembly work can be simplified and the frame 2 can be firmly fixed to the solar cell panel 1.

  Further, the length of the portion where the adhesive layer 6 is disposed is made smaller than the length of the corresponding frame portion, and the adhesive layer 6B is replaced with the portion where the adhesive layer 6B is disposed at the corner portion of the frame 2. The sealant 7 may be filled. By adopting such a configuration, it is possible to improve confidentiality particularly in a corner portion where entry of foreign matter is a concern. Note that the present invention may be applied to the frame structure of the first embodiment.

Embodiment 3 FIG.
FIG. 8 is a diagram showing a manufacturing process of the frame of the solar cell module according to Embodiment 3 of the present invention. In the figure, (a) shows a raw material plate 16A, (b) shows a first intermediate member 16B formed with a corner notch 16a by cutting, and (c) shows a second intermediate member 16C engraved with bending grooves 16b and 16c. . The raw material plate 16A is an aluminum plate having a thickness of 1 mm that is generally used outdoors such as building materials. The raw material plate 16 </ b> A has a length obtained by adding a clearance of 5 mm on each side (that is, 4 × 5 mm) to the length of the four sides of the solar cell panel 1.

  The raw material plate 16A is divided into four parts corresponding to the four sides of the solar cell panel 1, and corner part notches 16a that are 90 degree notches are formed by cutting on both sides of the boundary between adjacent divided parts. Thus, the first intermediate member 16B is obtained. This is because the corner notch 16a is abutted without being overlapped with each other as a part of the front frame or between the parts of the back frame when bent at a right angle as described above. . The first intermediate member 16B thus manufactured is engraved with the second intermediate member 16C by engraving the first and second bending grooves 16b and 16c so as to overlap the bending line in order to facilitate the bending. Become. Further, the second intermediate member 16C manufactured in this way is folded into a valley fold along the first folding groove 16b to form the frame 2 shown in FIG.

  In the present embodiment, the frame 2 is manufactured by bending the aluminum plate as described above. However, a rod-shaped member having a U-shaped cross section is manufactured by extrusion using a die (die), and the adjacent divided portions are formed. You may form by processing a corner part notch in the opposing surface of a boundary part. Further, the material is not limited to aluminum, and may be a polymer material as well as a metal material as long as it is a weather-resistant material that can withstand an outdoor environment for a long period of time. When a polymer material is used, it can be formed into a rectangular frame having a U-shaped cross section in the final form, for example, by injection molding. As described above, the frame may be manufactured by integrally connecting the frame portions of the four sides of the solar cell panel by molding. In addition to obtaining the same effect as the case where the frame is made from the above aluminum plate material by integrally connecting the frames by molding, it is also possible to reduce the weight of the solar cell module because a polymer material is used as the material. it can. At this time, by embedding a metal piece that bends at a right angle in the corner portion of the frame, the shape can be maintained after being incorporated into the solar cell panel, and a reinforcing effect can be imparted.

  The solar cell module according to the present invention is suitable for being applied to a solar cell module including a solar cell panel provided with a plurality of solar cells and a frame surrounding the peripheral edges of the solar cell panel. .

It is the perspective view seen from the light-receiving surface side of the solar cell module which concerns on Embodiment 1 of this invention. It is the perspective view seen from the back surface side of the solar cell module which concerns on Embodiment 1 of this invention. It is a disassembled perspective view for demonstrating the laminated structure of a solar cell panel. It is a perspective view which shows a mode that a flame | frame is attached to a solar cell panel. It is arrow sectional drawing which follows the EE line | wire of FIG. 2 which shows the internal structure of a solar cell module. It is a fragmentary sectional view which shows the panel support structure provided in the back surface of the solar cell panel. It is arrow sectional drawing which follows the EE line | wire of FIG. 2 which shows the internal structure of the solar cell module which concerns on Embodiment 2 of this invention. It is a figure which shows the manufacturing process of the flame | frame of the solar cell module which concerns on Embodiment 3 of this invention.

DESCRIPTION OF SYMBOLS 1 Solar cell panel 2 Frame 2A 1st frame part 2B 2nd frame part 2C 3rd frame part 2D 4th frame part 2a Main body frame 2b Front frame 2c Back frame 3 Rib (panel support structure)
5 Terminal box 6, 6B Adhesive layer (double-sided tape adhesive)
7 Sealant 8 Structural Adhesive 11 Translucent Substrate 12 Adhesive Layer 13 Back Sheet 14 Bus Bar Wiring 15 Collected Wiring 16A Raw Material Plate 16B First Intermediate Member 16C Second Intermediate Member 16a Corner Notch 16b First Bending Groove 16c Second bent groove 100 solar cell module

Claims (7)

A solar panel provided with a plurality of solar cells;
A frame that surrounds the periphery of the four sides of the solar cell panel,
The said frame is produced by bending the elongate member which has the length for the four sides of the said solar cell panel according to the four sides of the said solar cell panel. The solar cell module characterized by the above-mentioned. A solar panel provided with a plurality of solar cells;
A frame that surrounds the periphery of the four sides of the solar cell panel,
The solar cell module, wherein the frame is produced by integrally connecting four frame portions of the solar cell panel by molding. The frame functions as a protective member that protects the peripheral edges of the four sides of the solar cell panel, and a panel support structure that supports the load of the solar cell panel is provided on the back surface of the solar cell panel. The solar cell module according to claim 1 or 2. The frame is composed of a main body frame, a front frame, and a back frame, including an enclosure portion having a U-shaped cross section surrounding the periphery of the solar cell panel,
The frame is a peripheral portion of the solar cell panel in an adhesive layer formed between the main body frame and the solar cell panel and between the back frame and the solar cell panel in the surrounding portion. The solar cell module according to claim 3, wherein the solar cell module is fixed to the solar cell module. The panel support structure extends substantially over the entire length of the solar cell panel in the first direction on the back surface of the solar cell panel, and is spaced a predetermined distance in a second direction orthogonal to the first direction. The solar cell module according to claim 3, wherein the plurality of ribs are provided side by side. The solar cell module according to claim 5, wherein the rib has at least a U-shaped portion in cross-sectional shape. The solar cell module according to any one of claims 1, 3 to 6, wherein the frame is manufactured by bending a sheet metal.

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