JPS6246077B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a solar cell module by laminating glass plates, a resin material, a group of solar cell elements, and a resin protective material and bonding them under heat.

Generally, a solar cell element is completed by forming a PN junction on a substrate such as single crystal or polycrystalline silicon, and forming electrodes on the P-side and N-side surfaces to extract current. Since the solar cells will be installed in

Therefore, the solar cell element is assembled as a module wrapped in a material with excellent weather resistance and used as a solar cell power source.

A cross-sectional view of this solar cell module is shown in FIG. 3' is a lead wire connecting each solar cell element in the solar cell element group 5, and 4 is a highly water-resistant protective material for preventing water absorption of polyvinyl butyral, which is laminated and bonded.

One of the main operations in manufacturing this solar cell module is lamination adhesion. Laminated adhesive methods are conventionally often carried out in batch systems such as autoclaves.

However, this type of autoclave has the following disadvantages: it takes a long takt time, making it unsuitable for continuous production.

SUMMARY OF THE INVENTION An object of the present invention is to provide an adhesive sealing device that eliminates such drawbacks.

A feature of the present invention is that in an apparatus for manufacturing a solar cell module by laminating and thermocompression bonding glass plates, resin materials, solar cell element groups, and resin protective materials, an adhesive sealing chamber for performing a preliminary bonding process is provided. Finally, the adhesive sealing device is separated from the adhesive sealing chamber provided to obtain adhesive strength.

Next, an embodiment according to the present invention will be described in detail. As shown in FIG. Groups of solar cell elements 3, 3'...3n are stacked and stacked using polyvinybutyral (hereinafter referred to as PVB) 2, 2 ^' which has been tempered to the desired temperature. Furthermore, a protective material (for example, polyvinyl fluoride, or a film-like sheet made by laminating polyvinyl fluoride and metal film, etc.) is loaded. In this way, as shown in FIGS. 2 and 3, the previously prepared members 7 to 7'' are sent from the conveying device 9 to each of the preliminary crimping devices 10, 10', 10'', and the doors, 13, 13' and 13'' are opened as shown in the dashed line, the members are arranged like 7〓, 7〓, 7〓, degassed and temporarily bonded, and then the doors 13〓, 13〓, 13 〓 is opened and the temporarily bonded members 7〓, 7, 7 are stored in the magazine 8. This magazine 8 is inserted into the door 1 of the main crimping device 12.
4 is opened as shown by the dashed line and loaded into the main crimping device 12 in the state of a magazine 8'. The door 14 is closed again, and high-pressure, high-temperature gas is applied to the member to completely seal it. When sealing is completed, door 1
4' is opened as shown by the dashed line, and the members are taken out from the magazine 8' and placed on the conveyance device 15 as shown at 8''. From this magazine 8'', the adhesively sealed members 7, 7〓, 7 are Completely welded and completed. Each cross-sectional view of the pre-crimping device 10, 10', 10'' is shown in FIG. 5. This operation shows a cycle up to pressurization start time _t7 in FIG. 7. on the heater 16. Exhaust pipe 1
7 and 18, the chamber chambers 10 and 19 are simultaneously evacuated to reduce the pressure to the same level of vacuum, about 10 to 20 Toiv. Time to reach temperature from start
A current is applied to the heater 16 until time _t3 , and the heater _{16 is heated until cooling start time t6} . A suitable heater temperature is 80 to 120°C, and _t6 is approximately one hour. t ₆ from the start
By opening the leak valve 20 of the chamber 19 at the pressurization start time t ₂ during the heating time up to
Gradually return to atmospheric pressure. At this time, diaphragm 2
2 descends as shown by the dotted line 22' due to atmospheric pressure, presses the member 7, and temporarily welds it. Next, after ₅ hours, the leak valve 21 in the chamber 10 is opened,
At the same time, the heater current is cut off after ₆ hours to allow cooling. Once the pressure in the chamber 10 has risen to atmospheric pressure, the door 13' is opened and the member 7 is taken out and loaded into the magazine 8 in the chamber 23 of the crimping apparatus shown in FIG. Using another preliminary crimping device, the temporarily bonded members 7' to 7'' are simultaneously loaded into the magazine 8. Once loading is complete, hot air is introduced through the pressure pipe 23 to raise the pressure to 1 to 2 atmospheres and the temperature to 150 to 180 degrees Celsius. The voltage is applied to members 7, 7', 7''. Hold for about 1 hour,
After time _t10 has passed, the pressure is released from the pressure pipe 23 and the pressure is returned to atmospheric pressure. The temperature inside the chamber 24 is cooled by flowing water from the outside through a water cooling pipe 26 wrapped around the radiator 25. In this way, members 7, 7', 7'' are completely welded,
A solar cell module having the cross-sectional shape shown in FIG. 1 is obtained.

The adhesive sealing device obtained in this way is highly effective because it can easily increase the production of solar cell modules by increasing the number of preliminary crimping devices and expanding the chamber of the main crimping device. be.

[Brief explanation of the drawing]

Figure 1 shows a cross-sectional view of the solar cell module,
Reference numeral 1 indicates a light-receiving surface material (glass plate), 2 to 2' are polyvinyl butyral, 3 to 3' are solar cell element groups, 4 is a back protection material, and 5 is an interconnector. FIG. 2 is a plan view of the adhesive sealing device of the present invention, and FIG.
The figure shows a front view. In the figure, 7〓 to 7 are members to be adhesively sealed, 8 to 8'' are magazines, 9 is a conveyance device,
10, 10', 10'' are the chambers of the preliminary crimping device, 11 is the conveying device, 12 is the main crimping device, 13-
Reference numeral 13 represents a door 14, 14' of a preliminary crimping device, a door 14 of a main crimping device, and 15 a conveying device. FIG. 4 shows a cross-sectional view of the member to be adhesively sealed;
6 is a jig, 1 is a glass plate 2, 2' is polyvinyl butyral, 3 to 3 ⁿ are solar cell element groups, 4 is a back protection material, and 5 to 5 ⁿ are interconnectors. FIG. 5 shows a cross-sectional view of the pre-crimping device, in which 7 denotes members 10 and 19 to be adhesively sealed, a chamber chamber, 1
6 is a heater, 17 and 18 are exhaust pipes, 20 and 21
is a leak valve, 22, 22' is a diaphragm, 1
3 and 13' indicate doors, respectively. FIG. 6 shows a sectional view of the present crimping device. In the figure, 8
is the magazine, 14,14' is the door, 7,7'7''
23 represents a pressure pipe, 24 a chamber, 25 a radiator, and 26 a cooling pipe. FIG. 7 shows an operating diagram of temperature and pressure of this adhesive sealing device. The time shown on the horizontal axis is: t ₁ is the time to reach reduced pressure, t ₂ is the time to start pressurization, t ₃ is the time to reach temperature,
t ₄ is depressurization release time, t ₆ is cooling start time, t ₇ is pressurization start, heating start time, t _{8 is pressurization arrival time, t 9 is} heating arrival time, t ₁₀ is pressurization release time, t ₁₁ indicates the cooling start time.

Claims (1)

[Claims] 1. A plurality of preliminary bonding devices each introducing a laminate of a glass plate, a resin material, a solar cell element, and a resin protective material to be bonded together via a first conveying device;
a main bonding device that receives a plurality of the laminates pre-bonded by the plurality of pre-bonding devices, each via a second conveying device, and the preliminary bonding device has a lower chamber in which the laminate is installed; , an upper chamber installed above the lower chamber via a bellofram, means for evacuating the lower chamber, and means for introducing pressurized gas into the upper chamber, and the present crimping apparatus An adhesive sealing device comprising a processing chamber in which the plurality of laminates are installed, means for evacuating the processing chamber, and means for heating the inside of the processing chamber.