JPS607761A - High dielectric strength solar battery module - Google Patents

Abstract

PURPOSE:To obtain a high dielectric strength of the titled device by a method wherein a plurality of solar battery elements are molded in a transparent resin and a front side of the mold is covered with a hard transparent plate and a back side is covered with a sheet to form a flat device and its periphery is supported by a metal frame with a plastic insulator provided between the back side periphery and the side of the mold and the metal frame. CONSTITUTION:A plurality of solar battery elements 2 are arranged on a flat surface with a prescribed interval and molded with a transparent resin 3. The front of the elements 2 are covered with a hard transparent plate 1 and the back is covered with a protecting sheet material 4 to form a flat device 5. Then the periphery of the device 5 is tightened by a metal frame 6, composed of a front frame 6A, a side frame 6B and a shelf part 6C corresponding to the back side periphery, with a plastic insulator 7 such as polyvinyl chloride resin and scryl resin. With this constitution, a dielectric strength is improved and a leakage current is reduced.

Description

[Detailed description of the invention] The present invention relates to a high voltage solar cell module.

Generally, solar cell modules are used by connecting multiple solar cell elements in series and parallel, but since the output voltage per element is low at 0.5 to 0.6 volts, the output voltage of the entire module is at most DC. It was only about a hundred volts.

Recently, in some cases, an inverter (DC-AC converter) is used to convert the voltage into AC of several hundred volts, and there is a demand for a solar cell module with high voltage resistance against AC.

In view of the above, an object of the present invention is to provide a high-voltage solar cell module with a simple structure that can be easily implemented while adhering to the conventional basic structure.

The solar cell module of the present invention has a flat plate-like device in which a plurality of solar cell elements are molded in a transparent resin, the front side of which is covered with a hard transparent plate, and the back side of which is covered with a sheet body. In the device supported by
It is characterized by the interposition of a plastic insulator with a letter-shaped cross section.

Embodiments of the present invention will be described below with reference to the drawings.

A plurality of solar cell elements 2 connected in series and parallel are arranged in parallel on the back side of a hard transparent plate 1 made of glass, acrylic resin, polycarbonate resin, etc., and the surrounding area is made of weatherproof and transparent material such as silicone resin. It is filled with a light resin 3 and its back is covered with a back protection sheet material 4, which is made by laminating a metal thin film 4B onto a flexible and weather-resistant resin sheet 4A such as polyvinyl fluoride. what you did,
Alternatively, a metal plate or the like may be used. The above-mentioned flat device 5 is usually manufactured in a rectangular shape. The metal frame 6 supports the peripheral portion of the flat device 5, and includes a front frame portion 6A that contacts the front peripheral portion, a side portion 6B for the side surface, and a shelf portion 6C for the rear peripheral portion. .

A plastic insulator 7 having an L-shaped cross section is provided in contact with the inner surfaces of the parts 6B and 6C of the metal frame.

As this insulator 7, for example, soft or hard plastic such as vinyl chloride resin, acrylic resin, FRP, or thermoplastic or thermoplastic plastic can be used.

As an example of the present invention, a convection withstand voltage test was conducted using a vinyl chloride resin with a thickness of 1.5 mm as the plastic insulator 7, and the leakage current was 0.5 mAAC at 2,000 VAC, 3
Leakage current 0.9mAAC at ,000V, 4,000
The result was that there was no dielectric breakdown at V. By the way, when a conventional product that does not use an insulator was tested under the same conditions, dielectric breakdown occurred at only 1700 VAC.

The cross-sectional shape of the plastic insulator of the present invention is not limited to an L-shape, but may be any shape as long as it is provided in contact with at least the outer circumference of the back surface and the side surface of the flat device 5.

[Brief explanation of drawings]

The drawings are cross-sectional views showing embodiments of the present invention. 1.-Hard transparent plate 2-Solar cell element 3.-Transparent resin 4-Back protection sheet material 5-Planar device 6.-Metal frame 7-Plastic insulator Patent applicant Japan Solar Energy Co., Ltd. agent People Patent Attorney Nishi 1) Arata

Claims (1)

[Claims] In a device in which a plurality of solar cell elements are molded in a transparent resin, the front side of the device is covered with a hard transparent plate, and the back side of the device is covered with a sheet, and the peripheral part of the device is supported by a metal frame. , A high-voltage solar module characterized in that a plastic insulator is interposed between the back outer circumference and side surface of the flat device and the metal frame.