JP2004006625A - Solar cell module and solar cell array - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar cell module and solar cell array which can prevent a frame member from coming off a seal without using the frame member having a large cross-sectional area. <P>SOLUTION: In the solar cell module comprising frame members 2 mounted on the periphery of the solar cell module body 1 which has a plurality of solar battery cells arranged at the backside of a translucent panel, a reinforcing member 3 is spanned between the opposed frame members 2 at the backside of the solar cell module body 1, and a buffer material 4 is interposed between the reinforcing member 3 and the solar cell module body 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a photovoltaic module and a photovoltaic array, and more particularly to a photovoltaic module and a photovoltaic array provided with a frame member on the outer periphery of a photovoltaic module body.
[0002]
[Prior art]
In recent years, solar cells have been installed in buildings such as houses and buildings for environmental protection and energy saving. Solar cells are usually packaged and configured as solar cell modules to increase the output voltage and output current to the required values and to protect the cells over time.
[0003]
As such a solar cell module, as shown in FIG. 8, a light-transmitting panel 5 made of glass or the like is arranged on the light-receiving surface side of a solar cell 6, and a plurality of solar cells are provided on the rear surface side of the light-transmitting panel 5. The cells 6 were connected in series and in parallel, sealed with a transparent filler 7 such as EVA (ethylene-vinyl acetate copolymer), and a frame member 2 made of an extruded aluminum material was attached to the periphery of the module body 1. Type solar cell modules are frequently used.
[0004]
In this module, since the strength is secured not only by the translucent panel 5 but also by the frame member 2 made of an extruded aluminum material, the translucent panel 5 is not thickened even when the module main body 1 is enlarged. In addition, the light-transmitting panel 5 has an advantage that the amount of transmitted light can be increased and the power generation efficiency can be improved.
[0005]
However, demand has been increasing in recent years as environmental problems have been addressed, and cost reduction is an important point for further spread. As one of the cost reduction methods, it is conceivable to increase the size of the module body 1. By increasing the size of the module main body 1, the number of module manufacturing steps per unit power generation amount can be reduced.
[0006]
[Problems to be solved by the invention]
In the conventional solar cell module, since the strength is secured by the translucent panel 5 and the frame member 2, when the module main body 1 is enlarged, the translucent panel 5 is thickened so as not to bend. Otherwise, if the strength of the frame member 2 is not improved so as not to be deformed, the frame member 2 is deformed and the module body 1 comes off, so that the strength of the entire solar cell module cannot be secured.
[0007]
In addition, when a crystalline solar cell 6 was used, stress was applied to the solar cell 6 due to the bending of the module body 1 and the solar cell 6 was easily cracked. That is, in order to secure the strength of the entire solar cell module, a thick translucent panel 5 or a frame member 2 having a large cross-sectional area is required, which increases material costs, requires installation space, and weight. There was a problem that it became heavy and took much time for construction.
[0008]
In order to solve this problem, it has been proposed to secure the strength without increasing the weight by making the frame member 2 have a hollow structure (for example, see Patent Document 1). However, this method also has a problem that the cost is increased due to an increase in the amount of aluminum material used.
[0009]
It has also been proposed to provide and support a reinforcing member between opposed frame members of a solar cell module (for example, see Patent Document 2). However, according to this method, when a positive pressure is applied to the light receiving surface of the solar cell module, there is a problem that the reinforcing member pushes the solar cell element in the solar cell module and the solar cell element is broken.
[0010]
Moreover, the load given to the solar cell module differs depending on the installation area and the installation place. For example, there is a difference in the required wind pressure depending on the difference in the amount of snow and the height of the building to be installed. Therefore, the strength required for the solar cell module differs depending on the installation environment. However, if all products are designed for the strength of the installation environment where the highest strength is required, naturally there is a problem that high component costs will be incurred, and if a solar cell module with the strength corresponding to each installation environment is created, However, there has been a problem that productivity is low and the production cost is increased.
[0011]
The present invention has been made in order to solve the above-described problem, and can prevent a solar cell module body from coming off from a frame member without using a frame member having a large cross-sectional shape, and can prevent a solar cell element from cracking. It is an object to provide a battery module and a solar cell array.
[Patent Document 1]
JP 2001-123610 A [Patent Document 2]
Japanese Patent Application Laid-Open No. 9-148612
[Means for Solving the Problems]
In order to achieve the above object, in the solar cell module according to claim 1, in a solar cell module in which a plurality of solar cells are arranged on the back side of a translucent panel and a frame member is attached to an outer peripheral portion, A reinforcing member is provided so as to bridge the opposite frame member on the back side of the optical panel, and a cushioning material is interposed between the reinforcing member and the solar cell module body.
[0013]
In the above-mentioned solar cell module, it is preferable that the cushioning member is an elastic body having heat dissipation.
[0014]
Further, in the solar cell module, the elastic body preferably has adhesiveness.
[0015]
Further, in the solar cell module, the elastic body includes at least one of aluminum, zinc, iron, aluminum whose surface is nitrided, and silicon whose surface is nitrided, and silicon whose surface is oxidized by a silicone resin or an epoxy resin. It is desirable to be made of a sheet-like member added.
[0016]
Further, in the solar cell module, it is preferable that the reinforcing member is slidably attached to and detachable from the frame member.
[0017]
Further, the solar cell module may have a plurality of joining holes for attaching the reinforcing member to the frame member.
[0018]
In the solar cell module, the frame member may be a solid frame member.
[0019]
In the solar cell module, the frame member is preferably made of aluminum.
[0020]
In the solar cell module, it is preferable that the solar cell element does not exist directly above the cushioning material.
[0021]
Further, in the solar cell array according to claim 10, in a solar cell array in which a plurality of solar cells are arranged on the back surface side of the translucent panel and a solar cell module in which a frame member is attached to an outer peripheral portion is attached to a mount. The pedestal is in contact with the back surface side of the solar cell module main body via a cushioning material.
[0022]
In the above-mentioned solar cell array, it is desirable that the solar cell element does not exist directly above the buffer material.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing a back surface side of the solar cell module of the present invention, and FIG. 2 is a diagram showing a vertical cross-sectional structure. 1 and 2, reference numeral 1 denotes a solar cell module main body. The solar cell module body 1 fixes a solar cell 6 disposed at a predetermined position with an ethylene vinyl acetate (EVA) resin as a filler 7, and covers the front surface thereof with a translucent panel 5 made of a glass plate or the like. In addition, a back sheet 8 made of a weather-resistant sheet obtained by laminating a PET film and an aluminum foil is provided on the back side.
[0024]
A frame member 2 is attached to an outer peripheral portion of the solar cell module main body 1. The frame member 2 reinforces the solar cell module main body 1 so that it can be attached to a gantry or the like (not shown). The long side frame 2 (2a) along the long side of the solar cell module main body 1 And a pair of short side frames 2 (2b) along the short side, which are screwed together and connected. The frame member 2 is made of, for example, an extruded aluminum product.
[0025]
The supporting recess 2c of the solar cell module main body 1 is formed in the frame member 2 and has a U-shaped cross section that opens toward the inside of the frame member 2. The supporting concave 2c is formed in the supporting concave 2c. By fitting the side edges, the solar cell module main body 1 is held at a position away from the installation surface such as a roof by a certain distance. The structure of this frame member is called a solid type (L-shaped structure), as opposed to a hollow structure.
[0026]
The lower end 2d of the frame member 2 is bent in an L-shape, and the hole 10 formed in this portion is usually aligned with the hole formed in the mounting base, and the solar cell module is mounted on the mounting by screwing or the like. Install.
[0027]
According to the present invention, the reinforcing member 3 made of a steel plate or the like is fixed between the opposed long side frames 2a on the back surface side of the module main body 1. With this configuration, even when a force is applied from above the translucent panel 5, the width between the opposing frame members 2 does not increase, so that the deformation of the frame members 2 can be prevented, and the detachment of the module body 1 can be prevented. Can be prevented.
[0028]
At this time, the cushioning member 4 is interposed between the reinforcing member 3 and the solar cell module main body 1. The cushioning member 4 is made of an elastic material such as urethane foam, and is fixed to the reinforcing member 3 by bonding with an adhesive or the like. When the cushioning member 4 is interposed between the reinforcing member 3 and the solar cell module main body 1 in this manner, even if the module main body 1 bends due to a force applied from above the translucent panel, the module main body 1 is attached to the reinforcing member 3. Direct contact can be prevented, cracking of the solar battery cell 6 can be prevented, and the meaning of the provision of the reinforcing member 3 can be more effectively exhibited.
[0029]
Further, it is desirable that the cushioning member 4 is an elastic body having heat dissipation properties. By doing so, it becomes possible to radiate the heat of the solar cell module 1, and it is possible to suppress a decrease in the output characteristics of the solar cell module 1 due to a rise in temperature. The heat-dissipating elastic body includes at least one of aluminum, zinc, iron, the surface of which is oxidized by a heat-conductive silicone resin or an epoxy resin, aluminum whose surface is nitrided, and silicon whose surface is carbonized. And the like. As described above, when one or more of aluminum, zinc, and iron whose surfaces are oxidized, aluminum whose surface is nitrided, and silicon whose surface is carbonized, the thermal conductivity is improved and the weather resistance of these metals is improved. The performance is improved. Further, since it is an elastic body, it has an effect as a cushioning material and can be deformed and enter between the module main body 1 and the reinforcing member 3 without a gap, so that a more effective heat radiation effect is exhibited.
[0030]
FIG. 3 is a diagram illustrating a portion where the reinforcing member is attached to the frame member, and FIG. 4 is a diagram illustrating a portion where the frame member is attached to the reinforcing member. The joining protrusion 12 provided at the end of the reinforcing member 3 is inserted into the wide portion of the joining hole 12 provided in the L-shaped piece 2d at the lower end of the frame member 2 and is slid to the narrow portion, thereby connecting the reinforcing member 3 to the narrow portion. The frame member 2 is fixed. This makes it possible to easily attach the reinforcing member 3 at the installation site, for example, in accordance with the usage environment after the solar cell module is created and before the solar cell module is installed.
[0031]
In FIG. 3A, wide portions are provided on both sides at the center of the joint hole 11, and the reinforcing member is formed by inserting the bowl-shaped protrusion 12 shown in FIG. 3 is fixed to the frame member 2. Also, in FIG. 3 (b), a wide portion is provided on one side at the center of the joint hole 11, and the L-shaped protrusion 12 shown in FIG. 4 (b) is inserted and slid to the narrow portion. To fix the reinforcing member 3 to the frame member 2. Further, in FIG. 3 (c), wide portions are provided on both sides at the center of the joint hole 11, and the wing-like protrusions 12 shown in FIG. 4 (c) are inserted and slid into the narrow portions to reinforce. The member 3 is fixed to the frame member 2. Such connection holes 11 and protrusions 12 are provided on both of the two opposite frames 2a of the solar cell module.
[0032]
In FIG. 2, the joining position of the frame member 2 and the reinforcing member 3 is the L-shaped piece 2d at the lower end of the frame member 2, but is not limited to this. For example, as shown in FIG. It may be provided on the back side, or another protruding piece 2e for forming the joint hole 12 may be provided in the frame member 2 as shown in FIG.
[0033]
Furthermore, in the above embodiment, the description has been given of the provision of the pair of joining holes 12, but the present invention is not limited to this. By forming a plurality of pairs of joining holes 12, the number of reinforcing members 3 can be changed according to the usage environment of the solar cell module 1.
[0034]
FIG. 7 shows an embodiment of a solar cell array according to the present invention. A frame member 2 is attached to an outer peripheral portion of the solar cell module main body 1. The frame member 2 is fixed to the gantry 9 by screwing or the like. The pedestal 9 is in contact with the back surface of the solar cell module main body 1 via the cushioning material 4. With this configuration, even when a force is applied from above the solar cell module main body 1, the solar cell module main body 1 does not bend and the module main body 1 can be prevented from being detached from the frame member 2. Further, when the buffer material 4 is interposed between the gantry 9 and the solar cell module main body 1, the module main body 1 directly contacts the gantry 9 even when the module main body 1 is bent by applying a force from above the translucent panel 5. Can be prevented, and the solar cell 6 can be prevented from cracking.
[0035]
Further, in the above-described solar cell module and solar cell array, if the solar cell 6 does not exist directly above the mount 9 in contact with the back surface of the solar cell module main body 1 via the reinforcing member 3 and the cushioning material 4, the solar cell This is more effective for the problem of cracking of the cell 6.
[0036]
In addition, even if the back sheet 8 is damaged by interposing the cushioning material 4, the metal reinforcing member 3 or the gantry 9 does not directly contact the solar cell module body 1, so that it is effective as a safety measure. It is.
[0037]
Note that the present invention is not limited to the above embodiment. For example, the solar cell 6 may be a crystalline solar cell element or a thin-film solar cell element, for example. Also, in FIG. 7, the back surface of the solar cell module body 1 and the gantry 9 are described as contacting at a plurality of places, but the present invention is not limited to this, and the contact point may have any shape such as a point, a surface, or a line. It does not matter. In this case, the cushioning member 4 can be provided over a plurality of contact points. Further, the portion of the gantry 9 that is in contact with the back surface of the solar cell module body 1 via the cushioning material 4 may not be integrated with the gantry 9. For example, it may be separated and fixed to a roof or an outer wall.
[0038]
【The invention's effect】
As described above, according to the solar cell module of the present invention, the reinforcing member is provided so as to span the opposite frame member on the back surface side of the solar cell module main body, and a buffer is provided between the reinforcing member and the module main body. Since the material is interposed, the spread and deformation between the facing frame members can be prevented. Therefore, even if a solid frame member is used as the frame member, the strength can be secured, and the raw material cost of the frame member can be reduced. In addition, since the buffer member is interposed on the module body side of the reinforcing member, the solar cell module body can be prevented from directly contacting the reinforcing member even when the solar cell module body is bent, and the stress applied to the solar cell element is reduced. As a result, cracking of the solar cell element can be prevented.
[0039]
Further, when the joint between the reinforcing member and the frame member has a slide structure, attachment is easy, and additional installation is possible even when the solar cell module is attached to the gantry. When a plurality of joining holes are provided in the L-shaped piece at the lower end of the frame member, a plurality of reinforcing members can be provided. In this case, the reinforcing member can be additionally installed on the completed solar cell module, or the number of reinforcing members can be selected and installed, so that the strength can be set stepwise according to the installation environment of the solar cell module, The required strength can be met with only the minimum necessary cost.
[0040]
In addition, when the cushioning member is made of an elastic material having a heat radiation property, the heat of the solar cell module can be radiated, and a decrease in output characteristics of the solar cell module due to a rise in temperature can be suppressed.
[0041]
Further, according to the solar cell array according to the present invention, since the base is in contact with the back surface of the solar cell module main body via the cushioning material, even if a force is applied from above the solar cell module main body, the solar cell module main body is The module body can be prevented from being detached from the frame member without bending. In addition, since the cushioning material is interposed between the gantry and the solar cell module main body, it is possible to prevent the module main body from directly contacting the gantry even when the module main body bends due to a force applied from above the translucent panel. In addition, cracking of the solar cell can be prevented.
[Brief description of the drawings]
FIG. 1 is a diagram showing a back surface side of a solar cell module according to the present invention.
FIG. 2 is a view showing a vertical cross-sectional structure of a solar cell module according to the present invention.
FIG. 3 is a view for explaining a structure of a joining hole of a frame member of the solar cell module according to the present invention.
FIG. 4 is a view for explaining connection protrusions of a reinforcing member of the solar cell module according to the present invention.
FIG. 5 is a view showing another longitudinal sectional structure of the solar cell module according to the present invention.
FIG. 6 is a view showing another vertical cross-sectional structure of the solar cell module according to the present invention.
FIG. 7 is a diagram showing a structure of a solar cell array according to the present invention.
FIG. 8 is a view showing a conventional solar cell module.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Solar cell module main body 2 ... Frame member 3 ... Reinforcement member 4 ... Buffer material 5 ... Translucent panel 6 ... Solar cell 7 ... Filler 8 ...・ Back seat 9 ・ ・ ・ Stand

Claims (11)

In a solar cell module in which a plurality of solar cells are arranged on the back side of a translucent panel and a frame member is attached to an outer peripheral portion, a reinforcing member is stretched over an opposing frame member on the back side of the translucent panel. A solar cell module, wherein a cushioning material is interposed between the reinforcing member and the solar cell module body. The solar cell module according to claim 1, wherein the cushioning member is an elastic body having heat dissipation. The solar cell module according to claim 1, wherein the elastic body has adhesiveness. The elastic body is made of a sheet-like member to which one or more of aluminum, zinc, iron, the surface of which is oxidized, and the surface of which is nitrided, and silicon whose surface is carbonized are added to a silicone resin or an epoxy resin. The solar cell module according to claim 1, wherein: The solar cell module according to any one of claims 1 to 4, wherein the reinforcing member is detachable by sliding on the frame member. The solar cell module according to claim 1, further comprising a plurality of joining holes for attaching the reinforcing member to the frame member. The solar cell module according to any one of claims 1 to 6, wherein the frame member is a solid frame member. The solar cell module according to any one of claims 1 to 7, wherein the frame member is made of aluminum. The solar cell module according to any one of claims 1 to 8, wherein the solar cell element does not exist directly above the buffer material. In a solar cell array in which a plurality of solar cells are arranged on the back side of a translucent panel and a solar cell module having a frame member attached to an outer peripheral portion is mounted on a mount, the mount is provided on the back side of the solar cell module body. A solar cell array, wherein the solar cell array is in contact via a buffer material. The solar cell array according to claim 10, wherein the solar cell element does not exist immediately above the buffer.

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