JPS63147375A - Solar cell module and modularization thereof - Google Patents

Abstract

PURPOSE:To obtain a highly reliable, low-cost and lightweight module using such a synthetic resin as a low-cost polyvinyl chloride by a method wherein a solar cell and a supporting body made utilizing a base material having a low heat deforming temperature are bonding together with a sheetlike bonding agent. CONSTITUTION:A solar cell 1 and a supporting body 3 made utilizing a base material having a low heat deforming temperature are bonded together with a sheetlike bonding agent 2. Moreover, the solar cell 1 and the supporting body 3 made utilizing a base material having a low heat deforming temperature are subjected to a vacuum lamination processing at the heat deforming temperature or more of the above base material using the sheetlike bonding agent 2 and the solar cell 1 is modularized. For example, an amorphous Si solar cell, a polyvinyl chloride and an ethylene-vinyl acetate copolymer are respectively used for the solar battery cell 1, the supporting body 3 and the bonding agent 2. They are laminated in a frame 9 installed in an upper chamber 7 and a slower chamber 8, the interior of a device is evacuated to a vacuum state bring the materials into close contact with each other in the frame 9 and the materials are heated at 100 deg.C-150 deg.C, and at the same time, pressed and the pressing is continued until the materials are cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solar cell module whose support is a synthetic resin base material having a low heat distortion temperature, and a method for modularizing the solar cell module.

[Conventional technology]

Conventionally, when a solar cell and a support made of a synthetic resin base material are bonded together using a vacuum lamination method to form a module, sheets of ethylene-vinyl acetate copolymer, polyvinyl butyral, etc. are generally used as the adhesive. adhesive is used.

At this time, in order to improve the adhesive properties of the adhesive,
It is necessary to heat the support to 150°C, and if a material with a heat deformation temperature below the heating temperature is used as the base material, warping may occur due to shrinkage of the base material, roughening of the surface of the support, or melting. Therefore, it was necessary to select an expensive synthetic +Δ(fat) having a heat distortion temperature of at least 100° C. as the base material for the support.

[Problem that the invention seeks to solve]

In view of the above problems, the purpose of the present invention is to
When modularizing a solar cell and a support made of a synthetic resin base material using a sheet adhesive using a vacuum lamination method, a synthetic resin that has a heat distortion temperature lower than the heating temperature at that time, such as a general-purpose resin, is used. The object of the present invention is to realize a highly reliable, inexpensive, and lightweight solar cell module and a method for modularizing the same by using a synthetic resin such as polyvinyl chloride, which is highly reliable and inexpensive.

[Means for solving problems]

In order to achieve the above object, the present invention provides a solar cell module and a solar cell in which a solar cell and a support using a base material with a low heat distortion temperature are adhered with a sheet adhesive;
This invention discloses a method for modularizing a solar cell, in which a support using a base material with a low heat distortion temperature is vacuum laminated using a sheet adhesive at a temperature higher than the heat distortion temperature of the base material.

[Effect]

Since the solar cell module and its modularization method according to the present invention are constructed as described above, a general-purpose synthetic resin with a low heat distortion temperature such as polyvinyl chloride, polystyrene, or acrylic is used as the base material of the solar cell support. Using this technology, solar cells can be modularized by vacuum lamination to obtain highly reliable, inexpensive, and lightweight solar cells.

〔Example〕

The details of the present invention will be explained based on illustrated embodiments.

FIG. 1 is a sectional view of a first embodiment of a solar cell module according to the present invention.

In the figure, reference numeral 1 indicates a solar cell, and any one of a single crystal type, a polycrystal type, an amorphous type, etc. is adopted, and is not particularly limited.

Reference numeral 3 denotes a support made of synthetic resin that is attached via adhesive 2 to the light-receiving surface of the solar cell 1 and the surface disposed behind it.

The support body 3 is made of synthetic resin that supports the entire solar cell module, and various materials can be considered, but here, among thermoplastic resins such as polyvinyl chloride, polystyrene, and acrylic, thermoplastic resins with heat deformation temperature are used. Use one with a low temperature of 100°C or less.

Further, as the adhesive 2, a sheet adhesive such as ethylene-vinyl acetate copolymer, polyvinyl butyral, etc. is employed.

FIG. 2 is a sectional view of a second embodiment of the solar cell module according to the present invention.

This embodiment is similar to the first embodiment in that a support 3 is attached to the light-receiving surface of the solar cell 1 and the surface placed behind it via an adhesive 2, but the support 3 is attached to the light-receiving surface of the solar cell , a light-transmitting transparent protective material 5 is attached via an adhesive 4. seats will be adopted.

FIG. 3 is a sectional view of a third embodiment of the solar cell module according to the present invention.

In this embodiment, a transparent support 3 is attached to the light-receiving surface of a solar cell 1 via an adhesive 2, and this support 3 is made of a transparent acrylic plate or the like having translucency. After all, it is a synthetic resin with a heat deformation temperature of 100°C or less.

In addition, an adhesive 4 is applied to the light-receiving surface of the solar cell 1 and the surface that is placed behind it. A weather-resistant film 6 made of a sandwich-laminated aluminum film is attached.

In the first to third embodiments described above, sheet adhesives such as ethylene-vinyl acetate copolymer and polyvinyl butyral are used as the adhesive 2 and the adhesive 4. In order to improve the adhesion of the adhesive, heating at 100' to 150°C is necessary, and the synthetic resins used as the base material of the support 3 in the above examples include polyvinyl chloride, polystyrene, It deforms because it has a low heat deformation temperature, such as acrylic resin.

For this purpose, a vacuum laminating apparatus whose sectional view is shown in FIG. 4 is used.

That is, the support 3, the adhesive 2, the solar cell 1, the adhesive 4, and the transparent protective material 5 are sequentially laminated on the formwork 9 installed in the upper chamber 7 and the royal chamber 8, and the inside of the apparatus is vacuumed. Pull the material into formwork 9
Close it inside.

Then, the material is heated to 100'C to 150C and pressurized from the upper chamber 7 side, and the pressure is continued until the material is cooled.

Pressurization may be carried out by introducing atmospheric air into the upper chamber 7, or by forcibly introducing air, nitrogen, or the like to increase the pressure to above atmospheric pressure.

Note that 10 is a silicone rubber-based diaphragm for separating the upper chamber 7 and the lower chamber 8.

For example, the solar cell 1 is an amorphous silicon solar cell, the support 3 is polyvinyl chloride, the adhesive 2 and the adhesive 4.
If ethylene-vinyl acetate copolymer is used for 15 minutes at an atmospheric pressure of 1 kg/ci and a temperature of 150°C for 15 minutes, then pressurization is continued, and the solar cell is taken out after cooling, a suitable solar cell can be obtained. module was obtained.

At this time, the formwork 9 used is one processed with fluororesin to have heat resistance and prevent adhesion to the material.

Since the solar cell module made in this way is provided with a formwork 9 during vacuum lamination, even if a synthetic resin whose heat deformation temperature is lower than the optimum heating temperature for bonding is used as the base material, it will not heat up. The synthetic resin does not flow during compression, and by applying pressure after heating until cooling, it is possible to prevent warping, rough skin, etc. due to deformation of the support 3, and to reduce and stabilize the shrinkage rate of the support. Therefore, an inexpensive solar cell module can be constructed using polyvinyl chloride, polystyrene, acrylic resin, etc.

It is also possible to process without using a formwork, but dimensional deviations occur due to thermal deformation of the support 3, so post-processing such as cutting is required.

According to the method for modularizing solar cells according to the present invention, the support body 3 made of synthetic resin is heated to a temperature higher than its heat deformation temperature and then cooled under pressure, so that it is molded by so-called thermal annealing. Strain is relaxed, deformation caused by molding distortion after modularization can be prevented, and a reliable solar cell module can be obtained.

〔Effect of the invention〕

Since the solar cell module and the method for modularizing the same according to the present invention are constructed as described above, a solar cell module that is inexpensive, lightweight, and highly reliable is obtained by using a synthetic resin with a low heat distortion temperature as a support. This is what makes it possible.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a first embodiment of a solar cell module according to the present invention, FIG. 2 is a cross-sectional view of a second embodiment of a solar cell module according to the present invention, and FIG. 3 is a solar cell according to the present invention. FIG. 4 is a cross-sectional view of a third embodiment of the module, and FIG. 4 is a cross-sectional view of an apparatus for modularizing a solar cell module according to the present invention. 1: Solar cell, 2: Adhesive, 3: Support, 4: Adhesive, 5: ] 3 Akebo;! (E, 6: Film, 7 Upper chamber, 8: Lower chamber, 9: Formwork, 10: Diaphragm. jII Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1) A solar cell module formed by bonding a solar cell and a support using a base material with a low heat distortion temperature with a sheet adhesive. 2) A method for modularizing a solar cell, in which a solar cell and a support using a base material with a low heat distortion temperature are vacuum laminated using a sheet adhesive at a temperature equal to or higher than the heat distortion temperature of the base material. 3) A method for modularizing solar cells according to claim 2, characterized in that during vacuum lamination, pressure is continued from one side using a formwork if necessary. 4) A method for modularizing solar cells according to claim 2 or 3, in which a synthetic resin having a heat distortion temperature of 100° C. or lower is used as the base material. 5) A method for modularizing a solar cell according to claim 2, 3, or 4, in which a synthetic resin selected from polyvinyl chloride, polystyrene, and acrylic resin is used as the base material.