JP3260859B2 - Solar cell module and method of manufacturing the same - Google Patents

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 used for small electric equipment and the like and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventional solar cell module M
As shown in FIG. 4, a substrate 1 made of paper phenol, glass, aluminum, or the like is obtained by sandwiching a solar cell element 11 between films 12, 12 of EVA (ethylene vinyl acetate).
3 and then, for example, covered with a sheet 14 having a structure in which an aluminum foil is sandwiched between polyvinyl fluorides or the like, and subjected to lamination (lamination type), or as shown in FIG. The solar cell element 11 is put therein, and this is further sealed with a potting material 16 such as a silicone resin (potting type). As shown in FIG. 6, the solar cell element 11 is coated with a film 17 of polyethylene terephthalate or polyvinyl fluoride. It is common to sandwich the film 11 and laminate it (film type).

However, the above-mentioned laminating type is not suitable for mass production because the process is complicated and the number of sheets that can be laminated at one time is limited. Furthermore, there is a problem that the weight of the solar cell module of a small electric device is increased.

Further, in the potting type, it is necessary to harden the potting material after pouring the potting material into the case, and the time required for the potting material is long, so that this type cannot be efficiently mass-produced.

[0005] Further, even in the case of a film type, the number of sheets that can be laminated at one time is limited, which is not suitable for mass production.
Furthermore, since the strength is weak, it is limited to very special uses such as a solar car for racing, which requires light weight.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention solves the above-mentioned problems of the prior art, and provides a reliable and versatile solar cell module which does not increase the number of manufacturing steps, can be easily reduced in weight, and a method for manufacturing the same. The purpose is to do.

[0007]

In order to achieve the above object, a solar cell module according to the present invention is arranged such that a non-light-receiving surface side of a solar cell element is disposed on a printed circuit board on which an electrode pattern is printed. Wherein the printed circuit board has a connection solder printed on the electrode pattern, a positioning solder printed around the electrode pattern, and an air vent hole, and the solar cell The solar cell element is arranged on the printed circuit board such that the electrode on the non-light receiving surface side of the element is connected to the solder for connection, and the peripheral edge of the solar cell element is connected to the solder for positioning. And a light-transmitting insulating protective layer is applied and formed on the light-receiving surface of the solar cell element.

Further, according to the method for manufacturing a solar cell module of the present invention, on a printed circuit board provided with an air vent and having an electrode pattern printed thereon, a connection solder is provided on the electrode pattern.
A step of printing and coating solder for positioning around the electrode pattern, connecting an electrode on the non-light-receiving surface side of the solar cell element to the solder for connection, and soldering the periphery of the solar cell element to the solder for positioning. And a step of disposing the solar cell element on the printed circuit board, and a step of applying and forming a light-transmitting insulating protective layer on the light-receiving surface of the solar cell element.

It is to be noted that a plurality of solar cell elements are connected in series and / or
Alternatively, they may be connected in parallel.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described in detail with reference to the drawings. First, as shown in FIG. 1, cream solder S is printed and applied to a predetermined portion on a printed board 1 (glass epoxy board) on which the electrode pattern 2 is printed by a screen printing method. Here, the cream solder S is the electrode pattern 2
The connection solder S1 provided on the electrode portion 2 and the positioning solder S2 provided at four locations around the connection portion S2 for fixing a solar cell element described later are printed and applied.

Next, as shown in FIG. 2, the printed circuit board 1 is arranged such that the non-light-receiving surfaces of the solar cell elements 4 and 5 face downward.
Place on top. Here, the electrode portions on the non-light-receiving surfaces of the solar cell elements 4 and 5 are placed on the solder S1 for connection.
The peripheral parts of the solar cell elements 4 and 5 are arranged on 2 respectively. By doing so, it is not necessary to fix the solar cell elements 4 and 5 using a holding jig, a weight, or the like, and it is possible to prevent the solar cell elements 4 and 5 from shifting from a desired mounting position as much as possible.

Next, these are placed in a reflow furnace at 187 to
By baking at 220 ° C. for 30 seconds or less, the positive electrode portions of the solar cell elements 4 and 5 are connected to the electrode pattern 2 on the printed circuit board 1. Thereafter, the negative electrode portions of the solar cell elements 4 and 5 and the electrode pattern 2 on the printed circuit board 1 are connected by soldering with a wiring member 3, and an output lead wire is connected to the electrode pattern 2 to complete the wiring.

Next, from the light receiving surface side of the solar cell elements 4 and 5, a clear paint such as an acrylic resin, a silicon resin, or an epoxy resin or a coating material of a transparent electric insulating material is coated with a thickness of several tens to several hundreds of micrometers A degree of surface coating is performed, and an insulating protective layer 6 is formed on at least the light receiving surfaces of the solar cell elements 4 and 5. This coating can be performed by various methods such as a spray method, a dip method, and a dispenser method. In the case of the spray method, for example, after setting a product on the work table, the work table is moved in the Y-axis direction. At the same time, by moving the spray in the X-axis direction, a coating having a thickness of about 50 μm can be performed. The coating may be performed using a spray gun or the like. In the case of the dip method, for example, only the surface of the substrate is immersed in a container containing a liquid coating material, so that a coating having a thickness of about 100 μm can be performed. The dispenser method is almost the same as the spray method, but a coating material having a thickness of about 500 μm can be formed by discharging a coating material from a coating nozzle such as a flat nozzle.

Here, on the back surface of the printed circuit board 1, FIG.
As shown in (1), an air vent hole (about 1 mm in diameter) is provided to the extent that the coating material does not leak. As a result, the air after coating can be efficiently removed,
Problems such as deterioration of appearance, generation of corrosion, and reduction of power generation efficiency due to formation of air can be prevented.

Next, a desired solar cell module is completed by drying such as natural drying or hot air drying. Here, it takes about 6 hours for natural drying, but about 60 ° C for hot air drying.
Drying for about one hour is sufficient.

In the above-described embodiment, an example of a planar solar cell module has been described. However, the present invention can be applied to, for example, a solar cell module having a three-dimensional curved surface or unevenness. It is sufficient that a light-transmitting coating material is provided on the substrate, and it can be appropriately changed and implemented without departing from the gist.

[0017]

As described above, according to the solar cell module and the method of manufacturing the same according to the present invention, a light transmitting material is applied to at least the light receiving surface of the solar cell element. The coating can be performed by a simple method, and the productivity of the product is greatly improved as compared with the related art.

In addition, inexpensive materials such as paints and electric insulating materials can be used as the coating material for the insulating protective layer.

Further, the fixing of the solar cell element can be easily carried out by the waste solder provided on the printed circuit board. Further, the displacement of the solar cell element during firing of the solder can be prevented as much as possible, and the yield is greatly improved.

Further, when applying and forming an insulating protective layer,
Due to the presence of the air vent hole, air after application can be efficiently removed, and problems such as deterioration of appearance, occurrence of corrosion, and reduction of power generation efficiency due to the presence of air on the light receiving surface side of the solar cell element can be prevented as much as possible.

[Brief description of the drawings]

FIG. 1 is a view for explaining an embodiment according to the present invention, and is a perspective view showing how solder is arranged on a printed circuit board.

FIG. 2 is a diagram illustrating an example according to the present invention, and is a perspective view illustrating a manner in which a solar cell element is arranged on a printed circuit board.

FIG. 3 is a sectional view of a solar cell element according to the present invention.

FIG. 4 is a cross-sectional view illustrating a method for manufacturing a conventional solar cell module (laminate type).

FIG. 5 is a cross-sectional view illustrating a method for manufacturing a conventional solar cell module (potting type).

FIG. 6 is a cross-sectional view illustrating a method (film type) for manufacturing a conventional solar cell module.

[Explanation of symbols]

 1: printed circuit board 2: electrode pattern 3: wiring material 4, 5: solar cell element M: solar cell module

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01L 31/04-31/078

Claims (2)

(57) [Claims] 1. A solar cell module in which a non-light-receiving surface side of a solar cell element is arranged as a lower surface on a printed circuit board on which an electrode pattern is printed. The connection solder printed on the, the positioning solder printed around the electrode pattern, and an air vent hole, the electrode on the non-light receiving surface side of the solar cell element is connected to the connection solder, and The solar cell element is disposed on the printed circuit board so that a peripheral portion of the solar cell element is connected to the solder for positioning, and a light-transmitting insulating protective layer is provided on a light receiving surface of the solar cell element. A solar cell module characterized by being coated and formed. 2. A step of printing and applying a solder for connection on the electrode pattern and a solder for positioning around the electrode pattern on a printed circuit board provided with an air vent hole and printed with the electrode pattern; Connecting the electrode on the non-light receiving surface side of the element to the connection solder, and connecting the peripheral edge of the solar cell element to the positioning solder, and arranging the solar cell element on the printed circuit board; Coating and forming a light-transmitting insulating protective layer on the light-receiving surface of the solar cell element.