JPS61108178A - Solar cell module - Google Patents

Abstract

PURPOSE:To prevent a solar cell element from being destroyed during the assembly of a solar cell module, by adhering a protection sheet on the surface opposite to the light-receiving surface of each solar cell element. CONSTITUTION:A solar cell element 1 is reinforced by a protection sheet 7, which is adhered to the rear face of the cell element such that it covers approximately whole the surface except the portion occupied by a connection lead 2. Alternatively, a mesh protection sheet 8 may be adhered thereto. The protection sheet is made of a metal, or of acrylic or fluorine resin and adhered with solder or an adhesive. According to this construction, the yield and the reliability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solar cell module formed by arranging a plurality of solar cell elements.

[Conventional technology]

In general, solar cell modules are constructed by connecting a plurality of solar cell elements in series, parallel, or series-parallel to meet the required output to form a matrix, and the matrix can be used in harsh natural environments. For example, it has a structure protected by transparent resin, glass, and a frame to withstand wind, rain, snowfall, large temperature changes, and the like.

In the conventional solar cell module, during the process of assembling it into the above-mentioned structure, the strength of the solar cell substrate alone had to withstand various forces or impacts imposed during the process. Therefore, handling of a matrix consisting of a plurality of solar cell elements requires great care. Particularly in recent years, as solar cell elements have become larger in diameter, the burden of careful handling of the matrix has been increasing.

Furthermore, recently, a method has been developed in which solar cell matrices and plastics are sandwiched between PVB (polyvinyl butyral) sheets or EVA (ethylene vinyl acetate) sheets, and the matrices are encapsulated in transparent resin by heating and pressure. It has become a common technology. In this method, delicate conditions during pressurization apply biased force to the solar cell element, and there is a high probability that the element will be destroyed. Moreover, in this process, if even an element is destroyed, it is impossible to repair or replace only that element, and the entire module becomes defective, resulting in a large economic loss.

That is, FIG. 4 is a sectional view of a conventional solar cell module. In this figure, solar cell elements 1 are electrically connected to each other via element connection leads 2, sealed in transparent resin 3, and fitted into a metal frame 6 while being adhered to a glass plate 5. It becomes. Note that the external lead is indicated by 4 in the figure.

The mechanical strength of such a solar cell element 1 is determined by the strength of the substrate itself. For example, silicon (Si) or gallium arsenide (GaAs) are often relatively fragile, and the mechanical strength of the solar cell element 1 after completion of the module is determined by the strength of the substrate itself. Not only distortion but also damage during the module manufacturing process is likely to occur.

[Problem that the invention seeks to solve]

As described above, in the conventional method, there is a problem in that the solar cell elements constituting the matrix frequently break during assembly of the solar cell matrix into a module.

[Failure to solve the problem]

In order to solve the above problems, in the present invention, a protection plate is attached to the surface of each solar cell element opposite to the light-receiving surface.

〔Example〕

Next, all embodiments of the present invention will be explained.

FIG. 1 is a sectional view of an embodiment of the present invention. Comparing this with the conventional example shown in FIG. 4 in FIG. 1, the structure is the same except that a protective plate 7 is attached to the back surface of the solar cell element 1 for reinforcement.

FIG. 2 is a back view of the solar cell element shown in FIG. 1 taken out. The protection plate 7 is shown in a state where it is pasted over almost the entire surface except for the connection lead 2 portion.

FIG. 3 shows an example in which the protection plate 8 has a mesh-like shape.

The protective plates 7 and 8 are made of metal plates, acrylic resin, or fluororesin, and are attached by soldering or adhesive bonding, and can be attached either before or after connection with connection leads. obtain.

〔Effect of the invention〕

According to the present invention, since the solar cell element is lined and reinforced with a protective plate, cracking during the solar cell module assembly process is eliminated, and manufacturing yield and reliability are improved.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a back view of the solar cell element shown in Fig. 1, Fig. 3 is a back view of the solar cell element with a mesh protection plate attached, and Fig. 4 is a back view of the solar cell element shown in Fig. 1. FIG. 2 is a cross-sectional view of a conventional solar cell module. 1... Solar cell element, 2... Connection lead, 3... Sealing resin, 4... Drawer lead, 5... Glass Board, 6... Fully retracted frame, 7.8... Protective plate. Figure 7/F Figure 3

Claims (1)

[Claims] A solar cell module comprising a solar cell matrix in which a plurality of solar cell elements are connected in series, parallel or series-parallel and sealed in a transparent resin or sheet, characterized in that a protection plate is attached to the solar cell elements. .