JPS59198772A - Solar battery module - Google Patents

Abstract

PURPOSE:To contrive the miniaturization and light weight and the improvement of containability and portability by a method wherein a solar battery element arranged on a plastic film substrate and lead wires connected to electrode parts provided on both surfaces thereof are packaged so as to be covered with a thin plastic film from both surfaces. CONSTITUTION:A solar battery element 20 is arranged on a vinyl chloride film substrate 10. A back surface electrode layer 23 made of Ag and Al paste is formed over the end surface of said element 20 in the side abutting against said substrate 10. The soldered lead wires 31c and 31d are provided at a part of said electrode layer 23. On the other hand, a reflectionless coating layer 22 is provided on the end surface of the photo receiving surface side of said element 20, and, at a part thereof, a window formed in a comb shape is provided with electrodes 21a and 21b. The lead wire 31a is connected to the electrode 21a by soldering, and the lead 31b to the electrode 21b. The transparent plastic film 40 is so formed as to wrap said element and a part of the lead wires.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar cell module that is compact, lightweight, and portable.

Conventional solar modules provide the necessary power for 1η
The solar cell element is bored with silicone resin,
Do this 3-4 times. It is covered with tempered white plate glass with a thickness of about mm, and the entire frame is made of stainless steel, corrosion-resistant aluminum, reinforced plastic (FR1,), etc.
It was a supporting structure. Therefore, although the conventional solar cell module has excellent mechanical strength, the thickness of the solar cell module has reached about 5 to 1 Qmm, and the total weight of the module has reached 90%. These values are 10 to 20 times thicker and approximately 20 times heavier than the solar cell element itself. As can be understood from these numbers, conventional solar cell modules have drawbacks in terms of size, stiffness, portability, and storage.

Therefore, the present invention was made to improve the above-mentioned drawbacks, and the present invention is packaged in such a way that the solar cell element is directly sandwiched between two flexible plastic films and enclosed therein. , a lead wire capable of extracting power to the outside is connected to the electrode part of the solar cell element, so that each solar cell module can be freely connected and separated from each other via the lead wire, and each solar cell module is connected to the electrode part of the solar cell element. The object of the present invention is to configure each solar cell element so that it can be bent and folded at the boundary, thereby making the solar cell module smaller and lighter, more storable, and more portable.

That is, the present invention provides a plastic film substrate, a solar cell element disposed on the plastic film substrate that generates at least one photovoltaic force, and a photovoltaic element (4) disposed on both sides of the solar cell element. : A lead wire connected to the part, and a light large sword surface of at least the solar cell element is covered,
The present invention relates to a solar cell module comprising a transparent plastic film to which the bonding surfaces of the plastic film substrate are fixed.

Here, the plastic film substrate is a support against which the end of the gray light-receiving surface of the solar cell element comes into contact. As the material of the plastic film substrate, polyvinyl chloride, polyester, polycarbonate 1-1ABS, and polyurethane can be used. The thickness of the substrate is not particularly limited as long as it is flexible. Desirably, several 100μ01
Good condition.

As the solar cell element disposed on the plastic film substrate, a photovoltaic element such as single crystal, polycrystal, amorphous slurry, compound semiconductor, such as CdS, GaAS, etc. can be used. In the solar cell element, a light receiving surface is generally coated with an anti-reflection coating made of, for example, 5i02 or OiQ2, and an electrode portion is attached to the light receiving surface and the gray light receiving surface opposite thereto. Aluminum, silver, nickel, etc. can be used for the electrode member. A lead wire is connected to the electrode part so that the electric saw can be taken out to the outside.

The lead wire may be a single wire, but it is preferable to use a mesh-like flat conductor wire. The transparent plastic film disposed on the light-receiving surface side of the solar cell element can be composed of, for example, an acrylic film, a polyethylene film, a neoflon film, or a polypropylene film. Although the thickness is not particularly limited, it is desirable that it be as thin as possible in order to efficiently transmit sunlight. For example, several tens of μm
About 1 is good.

The bonding surfaces of the transparent plastic snack film and the plastic film substrate are bonded by thermocompression bonding, and the solar cell element and part of the lead wire are included inside. In order to join both PLUSDEC films by thermocompression bonding, the surface of the plastic film substrate is coated with polyester, polyamide, polyolefin, polyurethane, F, ■, A.
Adhesive films such as those of the same type are coated. Furthermore, the bonding may be performed using an organic adhesive instead of thermocompression bonding. Further, each solar cell element may be bonded to the plastic snack film substrate with an organic adhesive.

A connector to which another solar cell module of the same type can be connected is connected to the tip of the lead wire protruding from both plastic films. ] The structure of the connector is arbitrary. For example, a hook type, a jack type, etc. can be used. Further, the solar cell module of the present invention may have a single solar cell element or a plurality of solar cell elements. When multiple solar cells are installed, multiple solar cell elements are placed on the same plastic film substrate, and the transparent Shirasudek film on the front is used for packaging, and either one of the plastic snack films is used in common. The same plastic film is divided into each solar cell element, or both are divided into each solar cell element fυ and connected by lead wires.
It may be anything that connects each element electrically or mechanically.

Hereinafter, the present invention will be specifically explained with reference to Examples.

FIG. 1 is a plan view showing the configuration of a solar cell module according to a first embodiment of the present invention. Figure 2 is the ■− of Figure 1.
■It is a sectional view in the direction of arrows. A 200 μm vinyl chloride film substrate 10 was used as the plastic film substrate. The surface of the vinyl chloride film substrate 10 is coated with a polyester adhesive film. A solar cell element 20 is placed on the top surface of the vinyl chloride film substrate 10.
is installed. A back electrode layer 23 made of silver or aluminum paste is formed all over the end surface of the solar cell element 20 on the side that comes into contact with the vinyl chloride film substrate 10 . A part of the back electrode layer 23 is provided with soldered lead wires 31G and 31d.On the other hand,
A non-reflective coating layer 22 made of 5 iOz is provided on the end face of the light-receiving surface of the solar cell element 20, and a part thereof is formed in a comb shape, and electrodes 21a and 21b made of silver aluminum paste are provided in the 1c window. There is. A lead wire 37a is connected to the electrode 21a, and a lead wire 31b is connected to the electrode 21b by soldering. The transparent plastic film 40 is formed so as to enclose a portion of the solar cell element and the lead wires. The transparent plastic film 40 is
Acrylic film was used. On the other hand, an insulating layer made of an organic adhesive is formed on the side end surface 25 of the solar cell element 20.

The bonding surface 12 between the transparent plastic film 40 and the plastic film substrate 10 was formed by thermocompression bonding.

FIG. 3 is a plan view illustrating connections for each joule on the solar cell formed in this way. Figure 4 shows I of Figure 3.
FIG. 1 is an enlarged cross-sectional view in the direction of the V-IV arrow. In the first solar cell module, lead wires 31a and 31b are connected to electrodes on the light-receiving surface side of the solar cell element. On the other hand, the second
Lead wires 32C and 32d are connected to the back electrode layer of the solar cell element of the solar cell module. and,
31a and 320 are electrically connected by =1 connectors provided at the tips of lead wires 31a and 32c. The same applies to the lead wires 31b and 32d. Lead wire 3
1a etc. are made of mesh-like copper conducting wires and have a flat plate shape. A hole is formed in a part of the lead wire 31a to accommodate a convex connector. The convex connector consists of a contact part 51 and a support part 52, and the lead wire 31a is sandwiched between the contact part 51 and the support part 52.
Supported by a. On the other hand, the lead wire 32c is provided with a concave connector, and the concave connector consists of a contact portion 61 and a support ring 62. The contact portion 61 has a plurality of octopus-like shapes. The support ring 62 has the function of binding the contact portion 61 into one circular ring shape and tightening the contact portion 61. The contact portions 51 and 61 of the convex connector and the concave connector make electrical conduction possible.

Next, a solar cell module according to a second embodiment of the present invention will be described.

FIG. 5 shows a cross-sectional view of the structure of the solar cell module of the second embodiment. Solar cell elements 20a, 20b, and 20C are provided on a single plastic film substrate 1o. The side edges of these solar cell elements are insulated by an organic adhesive. The back electrode layer of each solar cell element is connected to the electrode on the light-receiving surface side of the adjacent solar cell element by a lead wire. For example, the solar cell element 20a and the solar cell element 20b adjacent to it are
0b light-receiving surface side electrode 24. b are connected to each other by a lead wire 33b. In this way, after each solar cell element is connected in series, it is packaged so as to be covered with a single transparent plastic film 4o, and the bonding surface of the transparent plastic film 4o and the plastic film substrate 1o is bonded with an organic adhesive. has been done. The solar cell module incorporating these three solar cell elements has a convex connector 50a on the lead wire 33a at one end and a four-part connector 50a on the lead wire 33d at the other end so that other solar cell modules of the same type can be connected to each other. 50 b are each marked in tiers.

FIG. 6, FIG. 7, and FIG. 8 show modified examples of the connecting portion of the solar cell element. FIG. 6 is a cross-sectional view of a solar cell module in which solar cell elements are provided on the same plastic film substrate 10, and the front transparent plastic film is divided into sections for each solar cell element (as shown in 408 and 40b) and packaged. be. 4. FIG. 7 is a sectional view of a solar cell module constructed by dividing a plastic film substrate and a transparent plastic film into respective solar cell elements. That is, solar cell elements 20a and 20bh are installed on the partitioned plastic film substrate 10a and plastic film substrate 10b, respectively,
Sectioned transparent plastic film 40a and 4. O
It is packaged by b. Lead wires 33b electrically and mechanically connect the partitioned elements.

FIG. 8 is a cross-sectional view of a solar cell module constructed using the same continuous thin film material for a plastic film substrate, a transparent plastic film, and an r-frame. Each of the plastic films is made of a single piece, and the connecting portion is joined by forming a U-shaped groove on both sides at the center in the thickness direction so as to cover the lead wire 33b.

FIG. 9 is a perspective view showing how the Joules on the solar cell are stored in the second embodiment. Since the plastic film substrate and transparent plastic film of the solar cell element are made of flexible thin film materials, they can be bent into any shape and folded at the joints of each solar cell element as shown in the figure.

In short, the present invention is a package jig in which a solar cell element that generates an electromotive force is covered with thin plastic films from both sides.

Therefore, since it is composed of a thin film, it is lightweight.

Moreover, the thickness can be extremely thin. Therefore, it is convenient to carry. Also, since it is made of plastic film, it has flexibility and can be folded. Furthermore, it is possible to connect the same solar cell modules in series or in parallel using externally provided connector terminals.

Therefore, it can be configured to obtain desired power during use.

[Brief explanation of the drawing]

FIG. 1 shows a solar cell structure L- according to a first embodiment of the present invention.
FIG. FIG. 2 is a sectional view taken in the direction of the arrow IF-■ in FIG. 1. FIG. 3 is an explanatory diagram illustrating the connection of the solar cell module of the same embodiment. FIG. 4 is a cross-sectional view of the connecting portion shown in FIG. 3 in the direction of the IV-IV arrow. FIG. 5 is a sectional view showing the configuration of a solar cell module according to a second embodiment of the present invention. FIG. 6, FIG. 7, and FIG. 8 are sectional views each showing a modification of the second embodiment. FIG. 9 is a perspective view illustrating how the solar cell module of the second embodiment is folded. DESCRIPTION OF SYMBOLS 10...Plastic film substrate 20...Solar cell element 23...Back electrode layer 21a, 21b...Light receiving surface electrode 31...Lead wire 40...Transparent plastic film FIG. 1 FIG. 2 Figure 3 IV IV Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] (1) A plastic film substrate, at least one solar cell element that generates photovoltaic force disposed on the plastic film substrate, and electrode parts provided on both sides of the solar cell element. a lead wire connected to the solar cell element; and a light incident surface of the at least solar cell element is coated;
A solar cell module comprising: a transparent plastic film whose bonding surface to the plastic film substrate is fixed; (2) The lead wire is provided with a connector electrically connected to another solar cell module at its tip end protruding from both the plastic films. solar cell module. (3) A plurality of surface solar cell elements are arranged on the same plastic film substrate and are electrically connected via the lead wires. Description - Solar cell module. (4) The plastic film substrate is divided into sections in which each solar cell element is arranged, and each solar cell element is connected via the lead wire, and the transparent plastic film is in the same continuous body. The solar cell module according to claim 1 or 2, characterized in that: