JP2017077167A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module in which visibility of identification display is enhanced so that exchange work efficiency is not compromised, and scratching of the light-receiving surface or the back surface due to a cable is prevented.SOLUTION: Since an identification display 7 for identifying a solar cell module 1 is provided in other than a region of the back surface opposite to the light-receiving surface, deviated from each line connecting multiple sets of fitting holes 41 bored in a frame to which a panel is fitted, and becoming the shade of a support frame 8, visibility of the identification display 7 is enhanced, and since the identification display 7 is provided with a printing area where the identification information of a module is printed, and a stick area 73 where a stick body 72 for fixing a cable 61, led out from the back surface of the module, to the back surface is stuck, a connector 62 existing at the tip of the cable 61 can be prevented from scratching the light-receiving surface or the back surface when the module is transported.SELECTED DRAWING: Figure 7

Description

  This embodiment relates to a solar cell module that converts sunlight into electric power using the photoelectric effect and outputs the electric power.

  Global warming and depletion of fossil fuels have become problems, and interest in the global environment and energy is rapidly increasing. Under such circumstances, sunlight is attracting attention as an energy source with a low environmental load, and mega solar power plants using sunlight are attracting attention.

  The mega solar power plant is a power plant in which a large number of solar cell modules for converting sunlight into electric power using the photoelectric effect are installed on the ground. The solar cell module is formed by fitting a plate-like solar cell panel in which solar cells are arranged in a two-dimensional array in series and in parallel into a frame surrounding four sides.

  This solar cell module is fixed to a pedestal installed on the ground with the light receiving surface on which the solar cells are arranged facing the sun and the back surface facing the ground. The support frame is generally provided with two parallel support frames, and the solar cell module is mounted on the support frame and fixed on the support frame by bolting or the like.

  Mega solar power plants are expected to operate for decades or more. Therefore, solar cell modules are designed to have a sufficient service life, but if they are constantly exposed to rain and wind, snowfall, dust, severe temperature differences, unexpected flying objects, etc. It needs to be replaced considering failure, deterioration, safety, etc.

  The solar cell module is managed by the individual identification number of the module, and the module type, connector type, performance, and characteristics are associated with the individual identification number. These associations are made by an identification display such as a label sticker, and the identification display is often attached to the solar cell module. The sticking location is mainly the back surface of the module (see, for example, Patent Document 1). The replacement operator selects and prepares an alternative product based on the identification display. The replacement worker looks into the back surface of the solar cell module and confirms the identification display.

Japanese Patent Laid-Open No. 11-261095

  The back surface of the solar cell module is a plain flat surface except that a junction box for drawing out a cable provided with a connector at the tip protrudes. As shown in FIG. 8, when sticking the label sticker as the identification display 70, the sticker is stuck straight with no inclination with respect to the side of the junction box 60 in order to maintain the beauty. That is, the identification display 70 is provided near the junction box 60. Since the junction box 60 bulges toward the end side of the back surface 11 of the module, the identification display 70 is also provided on the end side of the back surface 11. On the other hand, the support frame 8 of the gantry is passed in parallel to be separated from each other at both ends of the back surface 11 so as to fix the solar cell module 1 in a stable manner. Then, the support frame 8 on one side passes through a place close to the junction box 60, and the identification display 70 provided on the module back surface 11 may be hidden behind the support frame 8.

  In such a situation, it is difficult for the replacement worker to visually recognize the identification display 70 only by turning to the back surface 11 side of the solar cell module 1, and looks into the gap between the support frame 8 and the module back surface 11 with a unique posture. Or, it was forced to use a flashlight, and sometimes the solar cell module 1 had to be removed from the mount. Therefore, in the mega solar power plant in which the solar battery module 1 having the installation mode of the conventional identification display 70 is laid, the replacement work efficiency of the solar battery module 1 by the replacement worker may be reduced.

  A plurality of solar cell modules 1 are stacked and transported from a factory to a warehouse or site. If it does so, the back sheet | seat stuck on the back surface of the solar cell module 1 may be wound around by the vibration and vibration which arise by transportation, or the cable 61 extended from the solar cell module 1 located in the upper layer, and the connector 62 of the front-end | tip. May scoop around the light-receiving surface of the lower solar cell module 1 and damage it. In order to avoid this danger, the cable 61 is rounded and tied, but the work of unbinding is added to the installation work of the solar cell module 1, and the efficiency of a large amount of installation work is reduced.

  The present embodiment has been made in view of the above situation, and prevents damage to the light-receiving surface and the back surface of the solar cell module that enhances the visibility of the identification display and does not impair the replacement work efficiency. It aims at providing the solar cell module which achieves a measure, without impairing installation workability | operativity.

  The solar cell module of the present embodiment is a solar cell module that is attached to a gantry by installing a support frame on the back surface opposite to the light receiving surface, and other than the area behind the support frame in the back surface. Further, an identification display for identifying the module is provided.

  A panel having the light receiving surface and the back surface; a frame body into which the panel is fitted; and a plurality of mounting holes for the support frame, which are formed in the frame body. You may make it provide in the area | region remove | deviated from each line which tied the pair of attachment holes. The identification display may be provided in a region surrounded on all sides by the line on the center side of the back surface. The identification display may be provided in a central area on the back surface.

  Furthermore, it is provided with a cable pulled out from the back surface and provided with a connector at the tip, and the identification display includes a print area on which the identification information of the module is printed, and an adhesive body for fixing the cable to the back surface. It may be made to have a sticking field where sticks.

BRIEF DESCRIPTION OF THE DRAWINGS The whole structure of the solar cell module which concerns on 1st Embodiment is shown, (a) is a light-receiving surface side, (b) is a schematic diagram which shows the back surface side opposite to a light-receiving surface. It is a schematic diagram which shows the identification display of the solar cell module which concerns on 1st Embodiment. It is a figure which shows the construction aspect of the support frame with respect to a solar cell module. It is a figure which shows the construction aspect of the support frame at the time of using the clamp of a solar cell module. It is explanatory drawing which shows the attachment aspect of the clamp of a solar cell module. It is a schematic diagram which shows the identification display of the solar cell module which concerns on 2nd Embodiment. It is a schematic diagram which shows the back surface side of the solar cell module which concerns on 2nd Embodiment. It is a schematic diagram which shows the positional relationship of the conventional solar cell module and identification display.

  Hereinafter, the first and second embodiments of the solar cell module will be described in detail with reference to the drawings. The solar cell module which concerns on 1st Embodiment is related with the installation aspect of the identification display for improving the visibility of an identification display, and the solar cell module which concerns on 2nd Embodiment is a cable in addition to 1st Embodiment. The present invention relates to a mode of adding a new function to the identification display for preventing the light receiving surface and the back surface from being scratched.

(First embodiment)
As shown to (a) of FIG. 1, the solar cell module 1 is engage | inserted by the frame 4 surrounding the four sides of the plate-shaped solar cell panel 3 which arranged the photovoltaic cell 2 in the two-dimensional array form in series and in parallel. It consists of The side-by-side surface of the solar cells 2 is referred to as the front surface or the light receiving surface, and the surface opposite to the light receiving surface is referred to as the back surface.

  The solar battery cell 2 is a power generator that is formed by attaching electrodes to the front and back surfaces of a semiconductor wafer such as polycrystalline silicon and mounting it on a substrate, and converts light energy into electric power by the photovoltaic effect. The solar panel 3 is a plate in which a plurality of solar cells 2 are electrically connected in series and parallel so as to obtain a desired voltage and current. In order to withstand the surrounding environment, the solar cell 3 2 is sealed with a filler such as EVA, and the light receiving surface is covered with a protective plate such as a glass plate.

  As shown in FIG. 1B, the back surface of the solar cell module 1 is covered with a back sheet 5. A junction box 60 bulges on the back surface, and a cable 61 is drawn from the junction box 60. A connector 62 is attached to the tip of the cable 61. In addition, an identification display 7 of the solar cell module 1 is provided on the back surface of the solar cell module 1.

  The back sheet 5 is a sealing member that protects the solar cell panel 3 from moisture and the like, has weather resistance, and is laminated with an EVA film, a PET film, a fluorine coat layer, and the like, and is in close contact with the solar cell panel 3. ing. The cable 61 is a power line that extracts the power generated in the solar cell panel 3 to the outside. The connector 62 is a connection port that connects many solar cell modules 1 in series. The junction box 60 is a relay box between the cable 61 and the solar battery panel 3, has a bypass diode, and the cable 61 is drawn out.

  The solar cell module 1 has a rectangular shape. Junction box 60 is arranged in the center in the back surface width direction of this module, and is biased to one side of the center in the full length direction of the back surface. For example, in the solar cell module 1 having a total length of 1650 mm, the junction box 60 is disposed so as to be within 175 mm from one end of the frame. The cable 61 has a cable length that enters the center area of the back surface from the junction box 60. For example, in the solar cell module 1 having a total length of 1650 mm, the cable 61 having a cable length of 1300 mm is attached.

  The identification display 7 of the solar cell module 1 is a display object in which information for identifying the module can be recognized by an exchange worker or a reader. The identification display 7 is affixed to the center area of the back surface as a label seal. It may be printed directly on the back sheet 5, or may be provided in a structure that bulges in the back center area or is attached to the back center area.

  As shown in FIG. 2, the module specifying information displayed on the identification display 7 is a module individual identification number, a module type, a connector type, performance, and characteristics. Module performance is, for example, nominal maximum output, nominal maximum output operating voltage, nominal maximum output operating current, nominal open voltage, nominal short circuit current, and the like. The characteristics of the module are, for example, the maximum system voltage, wind pressure resistance, the assembly form of the array, the presence or absence of a bypass diode, and the like. The display object that can be recognized by the reader is, for example, a barcode.

  This identification display 7 is separated and pasted into, for example, a label 7a that describes the module type, connector type, performance, and characteristics, and a label 7b that describes the individual identification number of the module and its bar code notation. Yes. Both the label 7a and the label 7b are attached to the center area of the back surface. In some cases, a plurality of labels 7 b describing the individual identification number of the module and the bar code notation thereof are attached to the solar cell module 1. As the identification display 7 attached to the center area of the back surface, both the label 7a and the label 7b, either the label 7a or the label 7b, or at least one of the plurality of labels 7b can be considered.

  Such a solar cell module 1 is attached to a mount installed on the ground with the light receiving surface facing the sun. Attachment to the gantry is fastening with bolts. A plurality of mounting holes 41 for inserting bolts are formed on the back surface side of the frame body 4 of the solar cell module 1. As shown in FIG. 3, the solar cell module 1 is fixed to a support frame 8 of the gantry. From the standpoint of stability, the support frame 8 is divided into both end sides facing each other in the full length direction of the back surface, and is extended on the back surface so as to be separated from each other. That is, the support frame 8 is not constructed in the back surface center area A where the identification display 7 is provided.

  In the erection mode of the support frame 8 shown in FIG. 3, two support frames 8 are provided on both sides in the full length direction. That is, the solar cell module 1 is attached to a total of four support frames 8 and is positioned so that each two is divided into both sides and distanced from each other. One set of mounting holes 41 is made one hole at the same position on both sides of the frame 4 facing the support frame 8 in the width direction of the back surface.

  For example, in the solar cell module 1 having a total length of 1650 mm, a set of mounting holes 41 is provided at positions of 175 mm from one side end, and one support frame 8 is installed along the back surface width direction. Further, a set of mounting holes 41 is provided at both positions of 250 mm from the 175 mm position to the center side, and one support frame 8 is further installed. Then, the mounting hole 41 is not provided in the central region A having a total length of 800 mm surrounded by the two sets of mounting holes 41 on the inner side. Therefore, the support frame 8 is not installed in the central region A.

  The identification display 7 for identifying the solar cell module 1 is provided in the central area A where the support frame 8 is not installed. In the first embodiment, the identification display 7 does not need to be shaded by the support frame 8, that is, does not overlap with the support frame 8 and has good visibility. It may be provided. In this erection mode, the two support frames 8 are erected so as to be biased to one side, but the identification display 7 can also be provided in a region sandwiched between these support frames 8. In other words, at the manufacturing stage of the solar cell module 1, the identification display 7 may be provided in a region that is out of each line connecting the two mounting holes 41 that are paired with the single support frame 8.

  FIG. 4 shows another installation mode of the support frame 8. This erection mode is an example in which the solar cell module 1 is attached to the gantry using the clamp 9 shown in FIG. First, the clamp 9 is a member that sandwiches the solar cell module 1 together with the support frame 8, and fixes the solar cell module 1 to the support frame 8 by pressing the solar cell module 1 against the support frame 8.

  As shown in FIG. 5, the clamp 9 has a clamp 9 a having ears 91 extending horizontally outward at both ends of the U-shape, and two horizontal planes 92 in which two L-shapes are continuous. There is a clamp 9b. The clamp 9 a is provided between the pair of solar cell modules 1 and presses both the solar cell modules 1 against the support frame 8. The clamp 9 a suppresses the surface of the frame body 4 of the solar cell module 1 with the ears 91, makes the vertical surface follow the side surface of the frame body 4, and directs the U-shaped bottom toward the support frame 8. Then, a bolt is inserted from the bottom of the U-shape so as to penetrate the support frame 8 and tightened with a nut. The clamp 9 b holds the surface of the solar cell module 1 at the uppermost horizontal plane 92, and a vertical plane following the horizontal plane 92 is along the side surface of the frame body 4, and the horizontal plane 92 one level below is directed to the support frame 8. Then, a bolt is inserted from the horizontal plane 92 one step below so as to penetrate the support frame, and tightened with a nut.

  In the aspect using this clamp 9, the frame 4 and the support frame 8 of the solar cell module 1 are not directly fastened with bolts. However, as shown in FIG. 4, in order to fix the solar cell module 1 with a sense of stability, the installation range of the support frame 8 is provided for directly fastening the solar cell module 1 and the support frame 8. Of the mounting holes 41, the outermost mounting holes 41 are outside. That is, according to this aspect, the identification display 7 may be provided in a region outside the line connecting the mounting holes 41 of each set for mounting the support frame 8, and the support frame 8 is not installed on the most central side. What is necessary is just to provide in the center area | region A enclosed by the four attachment holes 41 at all sides.

  According to such a solar cell module 1, the identification display 7 is exposed without being hidden behind the support frame 8 even when installed on the mount. Therefore, the replacement worker can visually recognize the identification display 7 only by going to the back side of the solar cell module 1, and can confirm information for specifying the solar cell module 1 in an extremely short time. Therefore, the replacement work efficiency of the solar cell module 1 is improved.

  In addition, if the identification display 7 is provided in the center region A surrounded by the mounting holes 41 arranged on the most center side, without being aware of the installation region of the support frame 8 in the manufacturing process of the solar cell module 1, It can be provided naturally other than the area behind the support frame 8. The same applies even if the installation mode of the solar cell module 1 using the clamp 9 is planned to be adopted. Therefore, the solar cell module 1 does not affect the production efficiency.

(Second Embodiment)
In the solar cell module 1 according to the second embodiment, the identification display 7 is provided with a temporary fixing region for temporarily fixing the cable 61 to the back surface, and a function as a cable fixing means is given. That is, as shown in FIG. 6, the identification display 7 is a sticker on which a sticker 72 for fixing the cable 61 to the back surface is attached in addition to the print area 71 on which information specifying the module is printed. A region 73 is included.

  The sticking body 72 is a tape or the like having an adhesive applied on one side, and has a length that restrains the cable 61 on the sticking region 73. The sticking area 73 has a surface that allows only the sticking body 72 to be peeled off, and the identification display 7 is not damaged when the sticking body 72 is peeled off. A coating such as a laminate film applied for the purpose of protecting printing is sufficient for the surface of the sticking body 72. Further, when the identification display 7 is a metal plate, the coating may be unnecessary.

  As shown in FIG. 7, the identification display 7 that functions as the cable fixing means is an area that is not hidden behind the support frame 8 and is provided in a range that the cable 61 can reach. Desirably, in order to prevent the connector 62 from swinging when the solar cell module 1 is transported, the vicinity of the base of the connector 62 is centered on the junction box 60 in order to fix the vicinity of the base of the connector 62 with the sticking body 72. It is preferable to provide the identification display 7 so that the sticking area 73 is positioned on the arc having the radius.

  When it is assumed that the solar cell module 1 is transported in the vertical direction with the full length direction being vertical, the cable 61 is in a direction in which it naturally hangs down, that is, on a straight line straight down from the junction box 60 in the full length direction. It is preferable to provide the identification display 7 so that the sticking region 73 is positioned on an arc having a radius extending from the box 60 to the vicinity of the base of the connector 62.

  According to such a solar cell module 1, the identification display 7 functions as a cable fixing means in the transportation process. For this reason, even if the solar cell module 1 is stacked and transported, the cable 61 drawn from the upper solar cell module 1 is fixed to the back surface thereof, and does not crawl the back sheet 5 of the solar cell module. In addition, the back sheet 5 and the light receiving surface are not damaged without crawling around the light receiving surface of the lower solar cell module 1.

  Further, even if the cable 61 is fixed to the back surface, there is no risk of damage to the back sheet 5 because the fixing tape is not directly attached to the back sheet 5 that has been coated as a sealing member. There is no need to install a special structure for attaching the tape. Therefore, according to this solar cell module 1, transportation work, installation work, and replacement work, which have been reduced in efficiency due to the great care, are simplified, and work speed is improved.

(Other embodiments)
In the present specification, a plurality of embodiments according to the present invention have been described. However, these embodiments are presented as examples and are not intended to limit the scope of the invention. Specifically, a combination of all of the first and second embodiments is also included. The above embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

  In addition, as can be understood from the above, the identification display 7 attached to the back surface center area A is a case where both the label 7a and the label 7b, one of the label 7a and the label 7b, or a plurality of the labels 7b are attached. Means at least one label 7b. Further, the positional relationship between the printing area 71 and the sticking body 72 may be reversed.

DESCRIPTION OF SYMBOLS 1 Solar cell module 2 Solar cell 3 Solar cell panel 4 Frame body 41 Attachment hole 5 Back sheet 60 Junction box 61 Cable 62 Connector 7 Identification display 71 Print area 72 Adhesive body 73 Adhesion area 8 Support frame 9 Clamp 91 Ear part 92 Horizontal plane A Central area

Claims (4)

It is a solar cell module that can be attached to a gantry by installing a support frame on the back surface opposite to the light receiving surface,
A panel having the light receiving surface and the back surface;
A frame into which the panel is fitted;
A plurality of sets of mounting holes for the support frame, drilled in the frame;
Of the back surface, by being provided in an area outside each line connecting each set of mounting holes, provided in an area other than the shadow area of the support frame, and an identification display for identifying a module;
Providing
A solar cell module characterized by. The identification display is provided in a region surrounded on all sides by the line on the center side of the back surface;
The solar cell module according to claim 1. A junction box on the back surface of the panel;
The identification display is provided in a central region surrounded on all sides by the line on the center side of the back surface,
The junction box is provided on the center side of the back surface and is biased to the one side end side of the frame body outside the center region surrounded by the line on all sides;
The solar cell module according to claim 2. It is pulled out from the back surface and comprises a cable provided with a connector at the tip.
The identification display is
A printing area in which identification information of the module is printed;
A sticking region to which a sticking body for fixing the cable to the back surface is attached;
Having
The solar cell module according to any one of claims 1 to 3.

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