JP2002009325A - Solar cell module comprising base having hole in line to be bent, and method for output wiring of solar cell module using the hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module which can easily bend a base, and further has no obstacles in bending even if there is a wiring in a bending region, by a method wherein, upon shaping the solar cell module, a hole is opened in a line to be bent of a metal plate or resin plate as the base of the solar cell module. SOLUTION: In a bent solar cell module, a hole (1a) is opened in a line to be bent of a base (1) comprising a metal plate or a resin plate as a structural member of a solar cell module to bend via the hole. In the solar cell module, when an output wiring passes a bending part, it passes in the hole, thereby avoiding a mechanical stress receiving the wiring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell module formed by arranging power generating elements on a base made of a metal plate or a resin plate, and a shape for bending the base and extracting output from the solar cell module. The wiring method for

[0002]

2. Description of the Related Art In general, a solar cell module of a type in which power generation elements are arranged on a metal plate or a resin plate is used by being mounted on a roof material or a gantry or the like. It is required to carry out molding with a target shape and the like. In the molding, a bender machine and a roller former are generally used. The method of bending the metal plate or the resin plate, which is the base of the solar cell module, without using such a bender machine or a roller former has poor workability, and has a problem particularly in terms of finished dimensional accuracy and appearance. is there. The wiring for taking out the output of the solar cell module is formed by making a hole near the center in the width direction at a plane portion of the metal plate or the resin plate which is the base of the solar cell module, and through the hole, the metal plate or It is generally performed so as to penetrate the resin plate.

[0003]

By the way, as described above, bending of a metal plate or a resin plate serving as a base of a solar cell module is usually performed using a predetermined processing device, and the device is generally large in size. Therefore, bending using such an apparatus is not simple and leads to an increase in cost. Therefore, provision of a simple processing method is required. When a metal plate or a resin plate, which is a base of a solar cell module, is bent at a factory using a predetermined processing device, the obtained product has a bulky shape, and therefore, a large-sized package is required for packaging the product. Since a packing box is required, the package is transported after being packed in a large packing box, which leads to an increase in cost. Because of this, the factory can ship in a flat state without bulk without bending.
There is a demand for a solar cell module product that can easily perform desired processing such as bending at an installation location.

[0004] Furthermore, when installing a solar cell module having a base made of a metal plate or a resin plate,
Wiring and taking out of output wiring can be freely performed at desired positions without avoiding bent parts, so that connection with other solar cell modules can be easily performed.
In particular, it is required from the viewpoint of cost reduction. Furthermore, if the output wiring material of the solar cell module and the metal plate or the resin plate integrated with each other are bent, the bending radius is different between the inside and outside of the bent portion, so that it is impossible to apply the wiring material. Local strain may occur due to hard work. Therefore, improvement in this point is required.

[0005]

The present invention solves the above-mentioned problems. According to the present invention, for a metal plate or a resin plate serving as a base of a solar cell module, by forming several holes on a line to be bent, concentration of bending stress on a line connecting the centers of the holes, The metal plate or the resin plate can be easily bent straight. Further, when bending the integrated wiring material for the output of the solar cell module and the metal plate or the resin plate,
By passing the wiring material over the hole opened for bending, the deformation received by the wiring material stays in the space in the hole opened for bending, and the residual distortion can be prevented or reduced. Problem can be improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. However, the present invention is not limited to these examples. FIG.
8, reference numeral 1 denotes a metal plate or a resin plate (hereinafter, abbreviated as “base member”) serving as a base of the solar cell module. Reference numeral 2 denotes a solar cell as a power generating element (generally comprising a plurality of photovoltaic elements electrically connected). The solar cell 2 is in a state in which a photovoltaic element group (a plurality of photovoltaic elements are electrically connected) is resin-sealed (not shown). 3 indicates a back member,
4 indicates a surface member, and 5 indicates a wiring member. Reference numeral 1a denotes a hole formed in the base member 1 on a bending line. 2
a indicates an electrode member of the solar cell 2.

[0007]

Embodiment 1 FIG. 1 [FIGS. 1 (a) to 1 (c)] shows an example in which power generating elements are arranged on a base made of a metal plate or a resin plate, and a covering member is laminated. FIG. 5 is a diagram showing a procedure of manufacturing and bending a solar cell module, in which a hole is formed on a predetermined bending line of the metal plate or the resin plate serving as a base of the solar cell module.

As shown in FIG. 1A, a plurality of holes 1a are formed on a base member 1 on a line where the base member 1 is to be bent.
Is open. There is no equivalent to the hole 1a in the base member of the conventional solar cell module. On the base member 1 having the plurality of holes 1a, a back surface member 3, a solar cell 2 sealed with resin (not shown), and a front surface member 4 are laminated in this order, and subjected to a vacuum thermocompression treatment (shown in FIG. ) To obtain a solar cell module having the form shown in FIG. 1 (b).
In bending the base member 1 of the solar cell module shown in FIG. 1 (b), in the state shown in FIG. 1 (b) before bending, the fixed side 1b of the solar cell module is fixed, and the bent side 1c By applying force to the solar cell module to deform it to a target angle, a solar cell module whose both ends are bent upward as shown in FIG. 1 (c) is obtained. In this bending process, 1c may be the fixed side and 1b may be the movable side from the viewpoints of ease of processing, processing accuracy, and the relationship with the processing jig to be used.

FIG. 2 is an enlarged schematic sectional view showing a bent portion of the solar cell module shown in FIG. 1 (c). FIG.
Shows a case where the wiring passes inside the bent portion of the base member 1 of the solar cell module. That is, as shown in FIG. 2, the wiring member 5 inside the solar cell module is:
The portion bulged by the bending is accommodated in the hole 1a formed on the expected bending line. This eliminates or reduces the occurrence of distortion of the wiring member of the solar cell module. FIG. 4 is a schematic perspective view showing the entirety of the solar cell module shown in FIG. 1C in which both ends are bent upward.

[0010]

Embodiment 2 This embodiment shows a case where the base member 1 of the solar cell module shown in FIG. 1 (b) is bent in the opposite direction to the case shown in FIG. 1 (c). That is, in this example, a solar cell module in which both ends are bent downward is obtained. FIG. 3 is an enlarged schematic cross-sectional view showing a bent portion of the solar cell module. In the solar cell module of this example, the wiring member 5 inside the solar cell module passed outside the bent portion of the base member 1 as shown in FIG. The portion of the wiring member passes over the hole 1a formed on the expected bending line of the base member so as to cover the hole. This eliminates or reduces the occurrence of distortion of the wiring member of the solar cell module.

[0011]

Embodiment 3 In this embodiment, a solar cell module having the form shown in FIG. 5 will be described. The solar cell module is placed at the center of a parabolic antenna-type reflecting mirror that tracks the sun, for example, and receives light from the surroundings of 360 ° so that stronger light energy than usual can be obtained. As shown in FIG. 5, the solar cell module has a purpose of facilitating the bending of the base member 1 and a purpose of preventing the wiring member 5 from being pulled on a predetermined bending line of the base member 1 (metal plate or resin plate). , A hole 1a, and a bend through the hole formed on the expected bending line. The bending at that time can be easily performed. Further, disconnection of the wiring member 5 can be desirably avoided. In the case where the bending is performed without making the hole 1a in the base member 1, the amount of dimensional change received by the wiring member at the bent portion is large. Therefore, in many cases, the wiring member is pulled and disconnected. Sometimes.

[0012]

Fourth Embodiment In this embodiment, as shown in FIG. 6, a hole 1a is formed on a line to be bent of a base member 1 (metal plate or resin plate), and a hole formed in the base member on the line to be bent is formed. The solar cell module obtained by bending while alternately passing the wiring member 5 outside and inside the hole through the hole is shown. The embodiment shown in FIG. 6 can cope with a case where a large number of power generation elements (solar cells) are arranged in a limited area or a case where a design that is bent in a zigzag manner like a folding screen is required. In addition, since the bending position is determined by the hole formed on the expected bending line, there is little variation in the completed shape, and there is an advantage that it can be easily bent to a desired shape even at the construction site. Furthermore, there are two types of bending, bending in a concave shape and bending in a convex shape.In either case, the hole formed on the expected bending line makes it possible to avoid tension and compression of the wiring material, and the shape is reduced. Even after completion, the reliability of the electrical connection of the wiring is ensured.

[0013]

Embodiment 5 In this embodiment, a solar cell module having a processed shape shown in FIG. 7 is shown. That is, as shown in FIG. 7, the bending line of the base member 1 (metal plate or resin plate) is formed in an arc shape. In this example, a desired form can be obtained by bending a single module along a predetermined bending line without cutting the base member. That is, it is possible to achieve a low-cost solar cell module that is three-dimensional and has an excellent shape in terms of design.

[0014]

Embodiment 6 In this embodiment, as shown in FIG. 8, a back member 3 and a solar cell 2 sealed with a resin (not shown) are formed on a base member 1 having no holes formed on the predetermined bending line. The surface member 4 is laminated in this order (see FIG. 8A) and subjected to a vacuum thermocompression treatment (not shown) to obtain a solar cell module having the form shown in FIG. 8B. The base member 1 of the solar cell module is provided with a hole 1a at a predetermined position on the expected bending line.
Is opened so as to penetrate the surface member 4 (see FIG. 8B). When the solar cell module shown in FIG. 8B is bent, the fixed side 1b of the solar cell module is fixed, a force is applied to the bent side 1c, and the solar cell module is deformed to a target angle. As shown in ()), a solar cell module having both ends bent upward is obtained. This embodiment is different from the first embodiment in that the hole 1a is formed at a predetermined position on the bending line of the base member 1 after the solar cell module is manufactured. In other words, in this example, a basic model without holes is created, and finally, the position of the hole is determined and fine adjustment of the dimensions is performed, so that a work-in-progress method by a method corresponding to a plurality of solar cell module products having different dimensions is provided. There are further advantages such as a reduction in

[0015]

As described above, according to the present invention,
The bending process for the solar cell module can be easily performed at the installation place even in a factory. Therefore, the solar cell module manufactured in the factory does not need to be subjected to bending by a predetermined bending apparatus, and can be shipped and transported as a product in a flat state without bulk. For this reason, it is not necessary to perform bending using a bending apparatus at a factory, and the transportation burden can be reduced, such as when a bulky solar cell module product bent at a factory is transported. No special care is required to avoid damage during transportation. Therefore, the installation cost of the solar cell module can be significantly reduced. Furthermore, since the wiring of the solar cell module can be set without being subjected to mechanical stress by passing it through the hole position on the folding line, the degree of freedom in setting the position of the outlet of the wiring is widened, and in the case of installation, it is adjacent. A connection shape can be set at a position where connection with the solar cell module is easy.

[Brief description of the drawings]

FIG. 1 shows a solar cell module according to a first embodiment in which solar cells (power generation elements) are arranged on a base (base member) made of a metal plate or a resin plate and a covering member is laminated. It is a figure which shows the procedure of the preparation and bending process of the solar cell module characterized by making a hole on the bending line of the said metal plate or resin plate used as the base of a module.

FIG. 2 is an enlarged schematic cross-sectional view showing a bent portion of the solar cell module shown in FIG. 1 (c).

FIG. 3 is a schematic cross-sectional view showing, on an enlarged scale, a bent portion of a solar cell module in which both ends are bent downward in a second embodiment.

FIG. 4 is a schematic perspective view showing the whole of the solar cell module shown in FIG. 1 (c) in which both ends are bent upward.

FIG. 5 is a view schematically showing a processing shape in a third embodiment.

FIG. 6 is a view schematically showing a processed shape in a fourth embodiment.

FIG. 7 is a view schematically showing a processed shape in a fifth embodiment.

FIG. 8 shows a solar cell (power generation element) on a base (base member) made of a metal plate or a resin plate in the sixth embodiment.
The solar cell module is formed by laminating the covering member, and after the solar cell module is manufactured, a hole is formed at a predetermined position on a predetermined bending line of the base member. FIG. 3 is a diagram showing a procedure of bending and bending.

[Explanation of symbols]

 1 Metal plate or resin plate serving as a base 1a Hole drilled on the line to be bent 2 Solar cell 2a Electrode member of solar cell 3 Back surface member 4 Surface member 5 Wiring material

Claims (2)

[Claims] 1. A solar cell module in which power generation elements are arranged on a base made of a metal plate or a resin plate, wherein the base has a hole formed on a bending line of the solar cell module. 2. In a solar cell module formed by arranging power generating elements on a base made of a metal plate or a resin plate, wiring for taking out an output from the solar cell module is opened on a predetermined bending line of the base. An output wiring method for a solar cell module, characterized in that the output wiring is made to pass over a hole formed.