JP2016152332A - Solar battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a solar battery module from being deformed at a peripheral portion thereof and from being peeled off due to the deformation.SOLUTION: A solar battery module includes a layered body 6 in which a surface plate 3, a rear support plate 2, and a sealing material layer 5 sealing a plurality of solar battery cells 4 and disposed between the surface plate 3 and the rear support plate 2 are layered. At a peripheral portion of the layered body 6, spacer parts 12 are provided apart from each other with a predetermined interval therebetween along the peripheral portion, the spacer parts 12 penetrating through the sealing material layer 5 in a thickness direction thereof, and both ends thereof being fastened to the surface plate 3 and the rear support plate 2, resulting in connecting the surface plate 3 and the rear support plate 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a solar cell module in which a surface plate is provided on one surface of a sealing material layer sealing solar cells and a back support plate is provided on the other surface.

  This type of solar cell module is described in Patent Document 1. The solar cell module described in Patent Literature 1 is formed by raising a filler material sealing solar cells in a peripheral portion where no solar cells are present, thereby forming a raised portion. It is comprised so that peeling of may be suppressed. Further, in Patent Document 2, an anti-extrusion wall is provided between the front plate and the back support plate in order to prevent the sealing material from protruding from the module end face in the cell sealing step when manufacturing the solar cell module. Have been described. Furthermore, Patent Document 3 describes a solar cell module in which a sealing material surrounding an outer peripheral portion of a sealing resin layer is provided between upper and lower glass layers. Note that Patent Document 4 discloses a problem in which an end portion of a laminate is crushed when a glass substrate on which a thin film solar cell element is formed, a sealing material film, and a cover glass are laminated. .

Japanese Patent No. 4720174 JP 2014-013875 A JP 2014-212313 A Japanese Patent Application Laid-Open No. 2014-003170

  In the configuration described in Patent Document 1, since it is essential that the peripheral portion (or contour portion) is raised by the raised portion, the shape of the solar cell module becomes special, and the appearance of the solar cell module is impaired. Inconveniences such as obstructing the degree of freedom of shape may occur. In addition, in the structure described in patent document 2 or patent document 3, the prevention wall and sealing material which have closed the outer peripheral part of the sealing material layer over the perimeter can prevent the protrusion of a sealing material. However, since it does not function as a strength member against external force or thermal stress, there is a problem similar to the configuration described in Patent Document 1.

  This invention was made paying attention to said technical subject, Comprising: It aims at providing the solar cell module which can suppress a deformation | transformation and peeling in an edge part or a peripheral part, without impairing an external appearance. To do.

  In order to solve the above-mentioned object, the present invention includes a front plate, a back support plate, a sealing material layer that seals a number of solar cells and is disposed between the front plate and the back support plate. In the solar cell module having a laminate in which the surface plate and the back support plate are integrated at the periphery of the laminate through the sealing material layer in the thickness direction. A spacer portion for connecting the front plate and the back support plate is provided at a predetermined interval along the peripheral portion.

  According to the present invention, the provision of the spacer portion prevents deformation due to stress in a direction in which the back support plate and the surface plate are brought close to each other and deformation due to stress in a direction in which the back support plate and the surface plate are separated from each other. Accordingly, it is possible to prevent or suppress peeling starting from the peripheral edge or the edge between the front plate or the back support plate and the sealing material layer. In addition, since the spacer portions are arranged at intervals, the sealing material passes through the spacer portions and is in a state of being filled up to the end portions of the surface plate and the back support plate. Further, it is possible to prevent or suppress peeling from the peripheral edge or the edge. Further, in the present invention, since the portion protruding to the front surface side or the back surface side is not particularly generated, the appearance is not impaired, and the weight reduction is not particularly hindered.

It is sectional drawing which shows typically the structure of one Example of this invention. It is a figure for showing the state of arrangement of the spacer part, and is a partial view seen from the lower surface of the back support plate. It is a fragmentary sectional view which shows an example of the structure which adheres the spacer part and a back surface support plate. It is a fragmentary sectional view which shows the other example of the structure which adheres a spacer part and a back surface support plate. It is sectional drawing which shows typically the structure of the other Example of this invention. It is sectional drawing which shows typically the structure of the further another Example of this invention. It is sectional drawing which shows typically the structure of the further another Example of this invention.

  Hereinafter, an embodiment of a solar cell module according to the present invention will be described with reference to the accompanying drawings. A solar cell module 1 shown in FIG. 1 includes a back support plate 2 having rigidity capable of firmly supporting the whole, a surface plate 3 positioned at the top of the solar cell module 1, and the back support plate 2 and the surface plate. 3 and the laminated body 6 which consists of the sealing material layer 5 which seals many photovoltaic cells 4 arranged by the predetermined pattern.

  The back support plate 2 is made of a rigid material such as CFRP (carbon fiber reinforced plastic), an aluminum alloy, or PC (polycarbonate). The surface plate 3 is made of a material capable of maintaining weather resistance and light transmittance over a long period of time, such as PC (polycarbonate), acrylic resin, and PET (polyethylene terephthalate). Further, the solar cells 4 are composed of single crystal silicon, polycrystalline silicon, amorphous silicon, CIGS, IIIV group compounds, etc., and are connected to each other so as to obtain a predetermined rated output from one module. Electric power is output from the solar cell module 1 through a lead wire that is not connected. These sealing material layers 5 that seal the solar cells 4 are made of a transparent material such as EVA (ethylene vinyl acetate) or ionomer resin. The basic structure of the laminate 6 is almost the same as that of a conventionally known solar cell module.

  As shown in FIG. 1, a frame portion 7 that protects the end surface is provided at an end portion (peripheral portion) of the surface plate 3. The frame portion 7 includes at least a rear surface in a state of being separated from an end portion (periphery portion) of the back support plate 2 and a horizontal extension portion 8 extending horizontally from the surface plate 3 in the horizontal direction, a bent portion 9 bent downward thereafter. At a plurality of spaced positions along the outer peripheral edge portion of the surface plate 3 from the structure portion 11 having the vertical extension portion 10 extending in the vertical direction to the height of the support plate 2, the back surface from the horizontal extension portion 8 of the structure portion 11. The spacer portion 12 extends to the support plate 2 and is fixed to the back support plate 2.

  In the embodiment shown in FIG. 1, the horizontal extension 8 is disposed on a step 13 provided at an end of the surface plate 3 and is joined to the surface plate 3 by an appropriate adhesive. The upper surface 14 of the horizontal extension 8 and the upper surface 15 of the surface plate 3 on which the step portion 13 is not provided are substantially flush.

  The bent portion 9 bent downward from the end portion of the horizontal extension portion 8 is curved with a predetermined curvature, but may be bent at a right angle. Further, the edge of the vertical extension 10 extending downward from the bent portion 9 coincides with the same height as the lower surface 16 of the back support plate 2. In the illustrated example, the thickness gradually increases, but a constant thickness may be used.

  Further, as shown in FIG. 1, the spacer portion 12 extends integrally from the lower surface of the horizontal extension 8, and extends vertically to the upper surface 17 of the back support plate 2. As schematically shown in FIG. 2, a large number of the spacer portions 12 are arranged at intervals along the peripheral edge of the solar cell module 1. The spacer portion 12 is a pin or a shaft-like portion, and the horizontal cross section thereof may be circular or rectangular. Further, as shown in FIG. 3, the lower end portion of the spacer portion 12 may be fixed by caulking by allowing a protrusion 18 further protruding from the end portion to pass through a through hole 19 provided in the back support plate 2. With such a structure, the spacer part 12 or the structure part 11 integrated with the spacer part 12 and the back support plate 2 can be easily positioned relative to each other. Further, the spacer portion 12 may be fixed to the back support plate 2 by melt-bonding. Further, as shown in FIG. 4, it may be fixed to the back support plate 2 from below with screws 20 or the like.

  The frame portion 7 may be made of the same material as that of the surface plate 3. Alternatively, when higher mechanical strength and weather resistance than the surface plate 3 are desired, another material such as rubber, PC ( (Polycarbonate) may be used. In the latter case, when the frame portion 7 is disposed at a position that does not hinder the incidence of light on the solar battery cell 4, it may not have transparency. In FIG. 1, the solar cell module 1 is shown as a flat shape as a whole. However, the solar cell module 1 may be curved along opposing side surfaces or may have a lens shape with a protruding central portion.

  In the above-described solar cell module 1 shown in FIG. 1, the frame portion 7 is fitted and joined to the step portion 13 formed on the outer peripheral edge portion of the surface plate 3 so that the frame portion 7 and the surface plate 3 are integrated. The spacer portion 12 formed on the frame portion 7 penetrates the surface plate 3 and the sealing material layer 5 and is fixed to the back support plate 2. That is, the front plate 3 and the back support plate 2 are connected so as to be integrated by the spacer portion 12. Therefore, since the load in the crushing direction applied to the peripheral portion of the solar cell module 1 is carried by the spacer portion 12, deformation such as the peripheral portion is prevented or suppressed. Similarly, since the spacer portion 12 supports a load in a direction in which the front plate 3 and the rear support plate 2 are separated from each other, deformation such as peeling of the front plate 3 or the rear support plate 2 from the sealing material layer 5 is prevented. It is suppressed. Furthermore, since the structure part 11 which comprises the frame part 7 can make the rigidity high, it functions as what is called a reinforcement frame, As a result, the bending rigidity of the surface board 3 integrated with this And the deformation of the laminate 6 itself is prevented or suppressed, and the deformation of the peripheral portion is prevented or suppressed. Such a deformation preventing action is caused not only by an external force but also by a thermal stress. Therefore, the surface plate 3 or the back support plate 2 starting from the end portion or the peripheral portion of the laminate 6 is eventually sealed. It is possible to prevent or suppress the peeling with the stopper layer 5 and the progress of the peeling. Since the spacer portion 12 that causes such a function is provided inside the laminated body 6 and does not form an appearance, the appearance of the solar cell module 1 is not impaired, and the degree of freedom of the outer shape thereof. Will not be damaged.

  Next, another example in which a part of the configuration described above is changed will be described below. FIG. 5 shows an example in which the lower end surface 21 of the vertical extension portion 10 of the frame portion 7 is longer than the height of the lower surface 16 of the back support plate 2 by the length L in the embodiment shown in FIG. Yes. By doing in this way, the deterrent with respect to buckling becomes large.

  The example shown in FIG. 6 is an example in which the frame portion 7 having the above-described configuration is integrally formed on the outer peripheral portion of the surface plate 3. Since the surface plate 3 is for protecting the solar battery cell 4 or the sealing material layer 5 while transmitting light, the frame portion 7 for protecting the outer peripheral portion or the contour portion of the laminated body 6 is provided on the surface plate 3. Can be made of the same material. Therefore, the spacer portion 12 described above is integrated with the surface plate 3 and the frame portion 7.

  In the example shown in FIG. 7, a through hole 19 into which the spacer portion 12 is fitted is formed in the peripheral portion of the back support plate 2, and the spacer portion 12 and the back support plate 2 are crimped by crimping the lower end portion of the spacer portion 12 inserted therein. Are fixed examples. With such a configuration, the positioning of the frame portion 7 in the stacked body 6 becomes easy as in the configuration shown in FIG.

  In any of the configurations shown in FIGS. 5 to 7, the peripheral portion of the front plate 3 and the back support plate 2 is connected and integrated by the spacer portion 12. It is possible to effectively prevent or suppress deformation and peeling due to the deformation or progress of peeling. Moreover, it is the same as that of the example shown in FIG. 1 that the frame part 7 improves the bending rigidity of the whole solar cell module 1 and its peripheral part.

  The present invention has been described above with reference to various embodiments. However, the present invention is not limited to the illustrated and described embodiments, and the gist of the invention described in the claims. It goes without saying that various modifications and changes can be made within the range described above.

  DESCRIPTION OF SYMBOLS 1 ... Solar cell module, 2 ... Back surface support plate, 3 ... Surface plate, 4 ... Solar cell, 5 ... Sealing material layer, 6 ... Laminated body, 7 ... Frame part, 8 ... Horizontal extension part, 9 ... Bending part , 10 ... Vertical extension part, 11 ... Structure part, 12 ... Spacer part, 13 ... Step part, 14 ... Upper surface, 15 ... Upper surface, 16 ... Lower surface, 17 ... Upper surface, 18 ... Projection, 19 ... Through-hole 20 ... Screw, 21 ... Lower end surface.

Claims (1)

Solar cell module having a laminate in which a front plate, a rear support plate, and a plurality of solar cells are sealed and a sealing material layer disposed between the front plate and the rear support plate is laminated. In
Spacers that connect the front plate and the back support plate so as to integrate the front plate and the back support plate through the sealing material layer in the thickness direction at the periphery of the laminate. The solar cell module is characterized in that the portion is provided at a predetermined interval along the peripheral portion.

Images