JP2001177119A - Manufacturing method and device of solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module manufacturing method and a device, where a photovoltaic device can be sealed with sealing resin in a shorter time, at the same time filling failure of sealing resin is prevented from occurring. SOLUTION: A laminator of double vacuum chamber system is equipped with an upper and a lower chamber which are partitioned with a diaphragm, and when a photovoltaic device is sealed with sealing material by the laminator in a sealing process, the photovoltaic device and sealing material are arranged in the lower chamber as laminated, the upper and lower chamber are exhausted, and the inner pressure of the upper chamber is set at 1.2 to 6 atm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a solar cell module, and more particularly to a method for manufacturing a solar cell module having large irregularities on a photovoltaic element, a solar cell module having a glass fiber nonwoven fabric as a coating material, and the like in a short time. The present invention relates to a manufacturing method and a manufacturing apparatus for completing the coating with the method.

[0002]

2. Description of the Related Art Conventionally, various attempts have been made as a method of coating a solar cell module. For example, "Inves
Tigation of test method,
material properties, and
process for Solar cell en
capsulants annual report1
997 "describes those attempts.

[0003] Specifically,. Heating in a vacuum oven, A method in which the oven is evacuated and filled with nitrogen and heated when the temperature at which the sealing material melts is reached,
. A method of placing a weight on a stacked body of the coating material and the photovoltaic element packed in a pack, placing the weight in a vacuum oven, and heating. A method in which a stack of the coating material and the photovoltaic element packed in the pack is weighed, and the oven is evacuated to a vacuum and filled with nitrogen when the temperature reaches a temperature at which the sealing material is melted; A method of removing from the above-mentioned after-pack and further heating in an oven,. Pressurizing with nitrogen using an autoclave,. This is the source of the double vacuum chamber system.

[0004] In addition, "Investigation o
f test method, material p
roles, and process fo
rSolar cell encapsulants
Annual report 1984 "discloses a laminator of a double vacuum chamber system which advanced these.

[0005] The double vacuum chamber system will be described below. The laminator used in the double vacuum chamber system has a sectional structure shown in FIG. 201, 207 are support plates, 2
02 and 206 are gaskets, 203 and 205 are frame materials, 2
04 is a diaphragm, 208 is a screw, 209 is a valve in the lower chamber, and 210 is a valve in the upper chamber. First, FIG.
As shown in (2), the laminate 211 of the coating material and the photovoltaic element is placed in the lower chamber, and both the upper chamber and the lower chamber are evacuated from the valves 210 and 209. Subsequently, the apparatus is placed on a heat press and heated, and when a predetermined temperature is reached, air is introduced into the upper chamber from the valve 210 to bring the upper chamber to atmospheric pressure. As a result, the diaphragm 204 presses the coating material and the photovoltaic element, and the coating material is bonded to the photovoltaic element. Thereafter, heating is continued for a predetermined time, and the lamination is completed by cooling.

[0006] The solar cell module manufactured by the above-described method is a solar cell module having an excellent appearance with no remaining bubbles.

[0007] The use of a hot plate as the support plate 201 in the lower chamber of the double vacuum chamber type laminator in Fig. 2 is now generally used in a method of manufacturing a solar cell module.
Further, a method of performing only bonding using such an apparatus and heating in an oven for a predetermined time is often used.

[0008]

However, these conventional double-vacuum-chamber laminators have poor filling when the photovoltaic element has large irregularities or when a thick glass fiber nonwoven fabric is contained in the coating material. May occur. On the other hand, if sufficient time can be spent for the lamination process, such a defective filling can be avoided, but when increasing the production volume, the process becomes rate-limiting.

Also, the resin used for the sealing material is limited. That is, the resin having a high melt flow rate is flowed more than necessary by pressurization, and the thickness of the coating material becomes extremely thin. On the other hand, a resin having a low melt flow rate causes poor filling.

In view of the above circumstances, it is an object of the present invention to provide a method and an apparatus for manufacturing a solar cell module capable of sealing a photovoltaic element in a shorter time while preventing a defective filling of a coating resin. Is to do.

[0011]

The structure of the present invention to achieve the above object is as follows.

That is, the present invention relates to a method for manufacturing a solar cell module having a coating step of coating at least a photovoltaic element with a coating material by a double vacuum chamber type laminator in which an upper chamber and a lower chamber are separated by a diaphragm. So,
In the covering step, in a state where the photovoltaic element and the covering material are laminated and disposed in the lower chamber, the upper chamber and the lower chamber are evacuated, and then the upper chamber is subjected to a pressure greater than 1 atm. It is characterized by doing.

Further, the present invention is an apparatus for manufacturing a solar cell module using a double vacuum chamber type laminator in which an upper chamber and a lower chamber are separated by a diaphragm, wherein the lower chamber has at least a photovoltaic element, a coating material and In a state in which the upper chamber and the lower chamber are evacuated in a state in which the upper chamber and the lower chamber are stacked, a mechanism capable of adjusting the pressure of the upper chamber to a pressure greater than 1 atm is provided.

[0014]

According to the present invention, after at least the upper chamber and the lower chamber are evacuated in a state where at least the photovoltaic element and the coating material are laminated and arranged in the lower chamber of the double vacuum chamber type, the upper chamber is evacuated. By introducing a gas such as air and pressurizing to a pressure greater than 1 atm, it is possible to prevent poor appearance of the solar cell module even when there are large irregularities on the photovoltaic element. Even when a glass fiber nonwoven fabric is used as the covering material, it is possible to prevent poor filling. The coating of the photovoltaic element can be completed in a short time.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings.

First, the manufacturing apparatus will be described. FIG.
It is a cross section showing an example of composition of an apparatus used for manufacture of a solar cell module of the present invention. 1, reference numeral 101 denotes a lower chamber, 102 denotes an upper chamber, 103 denotes a diaphragm, 104 denotes a lower chamber intake / exhaust valve, and 105 denotes an upper chamber supply / exhaust valve.

(Lower Chamber) The lower chamber 101 has a function as a support plate when laminating the covering material and the photovoltaic element, and the sealing material in the covering material prevents the solar cell module from sticking. It preferably has releasability. If the film has no releasability, a releasable film may be provided. As the release film, a fluorine resin film is preferably used.

The lower chamber 101 preferably has a heating function. Examples of the heating method include a heating wire and an electromagnetic wave.

The lower chamber 101 needs to have a strength that can withstand vacuum evacuation and a strength that can withstand pressurization from the upper chamber. An O-ring may be provided at a portion where the lower chamber and the upper chamber are in contact with each other to further improve airtightness.

(Upper Chamber) The upper chamber 102 includes the diaphragm 10
3 has a function of pressing the laminated body of the coating material and the photovoltaic element disposed in the lower chamber 101 via the third member 3. In addition, upper room 1
02 is strength enough to withstand vacuum evacuation, and diaphragm 1
03 at 1 atm for the laminate of the coating material and the photovoltaic element.
It is necessary to have a strength that can be pressed with a larger pressure.

(Diaphragm) The diaphragm 103 is
The pressure is applied directly in contact with the laminate of the coating material and the photovoltaic element, and it is preferable that the sealing material in the coating material has releasability so that the solar cell module is not stuck.
When it does not have a release property, a release film may be used. The release film is preferably the same as that used for the lower chamber.

The diaphragm 103 is required to have heat resistance and followability. The heat resistance required of the diaphragm is that the sealing material in the coating material flows and can withstand the temperature at which the unevenness of the photovoltaic element can be filled. If the sealing material needs to be cross-linked, a temperature at which the cross-linking agent can sufficiently react,
You need to be able to withstand time. On the other hand, the followability required for the diaphragm is that it can follow irregularities on the surface of the photovoltaic element. When the thickness is reduced, the followability is excellent, but the gas permeation amount increases, the degree of vacuum decreases, and the effect of pressurization decreases. Conversely, when the thickness is increased, the followability decreases, but the gas permeation amount decreases.

(Supply / Exhaust Valve in Lower Chamber) The intake / exhaust valve 104 in the lower chamber is connected to a vacuum pump (not shown).
It is preferable that the vacuum pump has a capacity capable of reducing the inside of the lower chamber to 2.7 × 10 ³ Pa or less, and examples thereof include a rotary pump and a dry pump.

(Supply / Exhaust Valve of Upper Chamber) The intake / exhaust halve 105 of the upper chamber is connected to a vacuum pump and a pressurizing device (not shown). The inside of the upper chamber was 2.7 × 10 ³ for the vacuum pump.
It is preferable to have the ability to be Pa or less, for example,
Rotary pumps, dry pumps and the like can be mentioned. The pressurizing device needs to have a capability of increasing the pressure inside the upper chamber to more than 1 atm (atmospheric pressure), and it is preferable to pressurize the upper chamber by sending gas such as air into the upper chamber.

Hereinafter, a procedure for manufacturing the solar cell module of the present invention will be briefly described. 1. A laminate of a covering material and a photovoltaic element is disposed in the lower chamber 101. 2. The lower chamber 101 is covered with an upper chamber 102. 3. The upper chamber 102 and the lower chamber 101 are evacuated. 4. Air is sent into the upper chamber 102 and pressurized. 5. The lower chamber 101 is heated at a predetermined temperature for a predetermined time.
This heating may be started before the upper chamber 102 is pressurized. 6. The lower chamber 101 is cooled. 7. The upper chamber 102 is pulled up from the lower chamber 102, and the solar cell module is taken out.

In the manufacturing method of the present invention, it is particularly preferable that the pressure at the time of pressurizing the upper chamber is 1.2 to 6 atm. If this pressure is less than 1.2 atm,
When the effect of the present invention is difficult to obtain and exceeds 6 atm, particularly when a resin having a large melt flow rate is used as a coating material, the resin is excessively flown by pressure and the thickness of the coating material becomes extremely thin. In addition, the insulation is likely to be reduced.

[0027]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples.

Example 1 In this example, a solar cell module having the structure shown in FIG. 3 was prepared as an evaluation module. As shown in FIG. 3, the solar cell module includes a back reinforcing plate 301, a laminated film 3 of a back cover material.
11, photovoltaic element 305, laminated member 31 of surface coating material
2 was prepared by first preparing.

(Back reinforcing plate) As the back reinforcing plate 301, a galvanized steel plate (0.4 mm thick) was prepared. Two holes (15φ) for taking out the back surface electrode were previously formed in the reinforcing plate.

(Laminated Film of Back Coating Material) As a laminated film 311 of back coating material, a double-sided corona-treated 2
Axial stretched polyethylene terephthalate film (thickness 1
(100 μm) and 100 parts by mass of ethylene-vinyl acetate copolymer (EVA) (vinyl acetate content 28% by mass) and t-butyl peroxy 2-ethylhexyl carbonate 1.5 as a crosslinking agent Parts by mass, 0.3 parts by mass of 2-hydroxy-4-n-octoxybenzophenone as an ultraviolet absorber, 0.2 parts by mass of tris (mono-nonylphenyl) phosphite as an antioxidant, and as a light stabilizer (2,2,6,6-tetramethyl-4-piperidyl) 0.1 part by mass of sebacate was mixed, and a 200 μm-thick back surface sealing material 302, 304 was laminated using an extruder and a T-die. A film was used. Both sides of the laminated film 311 were embossed with a 15 μm embossing roll. Further, a hole of 6φ was punched at a position corresponding to the electrode extraction of the photovoltaic element.

In this embodiment, the photovoltaic element 305
As a result, an amorphous silicon photovoltaic element having the configuration shown in FIG. 4 was manufactured. In the present invention, the photovoltaic element is not particularly limited. Hereinafter, the fabrication of the photovoltaic device of this example will be described.

(Preparation of Photovoltaic Element Substrate) First, a washed belt-shaped stainless steel substrate was prepared, and an Al layer (5,000 膜厚 thick) as a back reflection layer and a Zn film were formed on the substrate by sputtering.
O layers (thickness 5000 °) were sequentially formed. Then, by plasma CVD, an n-type amorphous silicon layer using a mixed gas of SiH ₄ and PH ₃ and H _2, SiH ₄ and H ₂
And a p-type microcrystalline μc-Si layer using a mixed gas of SiH ₄ , BF _3, and H _2.
i-layer thickness 4000 ° / p-layer thickness 100 ° / n-layer thickness 10
A tandem type amorphous silicon photoelectric conversion semiconductor layer having a layer structure of 0 ° / i layer thickness 800 ° / P layer thickness 100 ° was formed. Next, as a transparent conductive layer, an In ₂ O ₃ thin film (thickness: 700 °) was formed by depositing In by a resistance heating method in an O ₂ atmosphere. 35
A stainless steel substrate 400 cut to 6 mm × 239 mm and laminated with a back reflection layer, a photoelectric conversion semiconductor layer, and a transparent conductive layer
I got

(Preparation of current collecting electrode) As the current collecting electrode 402, a copper wire having a diameter of 100 μm coated with a conductive resin was used.

First, a carbon paste for forming the conductive resin of the coating layer was prepared as follows.

As a solvent, a mixed solvent of 2.5 g of ethyl acetate and 2.5 g of isopropyl alcohol was put into a shaker for dispersion. Next, 22.0 g of a urethane resin as a main agent was added to the shake bottle, and sufficiently stirred by a ball mill. Next, 1.1 g of a blocked isocyanate and 10 g of glass beads for dispersion were added to the solution as a curing agent. Next, 2.5 g of carbon black having an average primary particle size of 0.05 μm as conductive particles was added to the solution.

The shake bottle into which the above-mentioned materials were charged was dispersed by a paint shaker for 10 hours. Thereafter, the average particle size of the paste was about 1 μm.

Next, a coating layer was formed using a vertical wire coater as follows.

First, a reel around which a copper wire was wound was set on a delivery reel, and the copper wire was stretched toward a take-up reel. Next, the following coating was performed by a coater.

The coating speed is 40 m / min and the residence time is 2
In a second, the temperature of the drying furnace was set to 120 ° C., and the coating was performed five times. The diameter of the enamel coating die used is 110 μm
To 200 μm. Under these conditions, the paste is present in an uncured state due to evaporation of the solvent. The average thickness of the coating layer was 20 μm.

(Preparation of Photovoltaic Element) An etching paste containing ferric chloride as a main component and a commercially available printing machine were placed on the front side of a stainless steel substrate 400 on which a back reflection layer, a photoelectric conversion semiconductor layer, and a transparent conductive layer were laminated. A part of the transparent conductive layer was removed so that the power generation area was 800 cm ² by using the same, and a power generation area and a non-power generation area (not shown) were formed on the transparent conductive layer. Hard copper (100μ thick)
m, width 7 mm) as the negative electrode terminal member 404 by soldering. The insulating adhesive 401 (silicone adhesive thickness 50 μm / polyimide thickness 25 μm /
(Silicone adhesive thickness 25 μm / polyethylene terephthalate thickness 75 μm / silicone adhesive thickness 50 μm)
Was bonded so that the polyimide was disposed in the non-power generation ridge area on the surface side. The current collecting electrodes 402 were arranged at intervals of 5.5 mm, and the ends were fixed with the insulating adhesive 401. Silver-plated hard copper (thickness: 100 μm, width: 5.5 mm) as the positive electrode terminal member 403 was disposed on the current collecting electrode 402 and the insulating adhesive 401. 20 to adhere the collecting electrode 402 to the transparent conductive layer.
Thermocompression bonding was performed at 0 ° C. and a pressure of about 2 × 10 ⁵ Pa for 1 minute. In order to make the current collecting electrode 402 and the positive electrode terminal member 403 more adhere, the positive electrode terminal member is heated at 200 ° C. and about 6 × 10 ⁵ Pa
Pressure bonding for 15 seconds. An insulating tape 4 having a width of 9 mm is formed on the positive electrode terminal member 403.
05 (black polyethylene terephthalate thickness 100μ)
m / thickness of the acrylic pressure-sensitive adhesive 30 μm). Thus, a desired photovoltaic element 304 was obtained.

The height of the current collecting electrode 402 on the photovoltaic element thus produced was about 200 μm. The above steps were repeated to produce 70 photovoltaic elements having a power generation area of 800 cm ² .

(Preparation of Photovoltaic Element Group) Three photovoltaic elements having a power generation area of 800 cm ² are arranged face-down on a jig at equal intervals so that the photovoltaic element spacing is 2 mm. Was. Next, the positive electrode terminal member was electrically connected to the negative electrode terminal member of one of the photovoltaic elements by soldering.

(Extraction of Back Electrode) An operation of extracting electrodes from the elements at both ends of the ten photovoltaic elements to the back was performed.
The method of taking out the positive electrode is as follows.

As shown in FIG. 5, an insulating tape 501 (polyimide thickness 25 μm / acrylic adhesive thickness 25 μm,
Internal short circuit is prevented by a width of 40 mm, and a soft copper foil 502 (thickness: 10
(0 μm, width 25 mm) was attached to the back surface of the photovoltaic element 503. Both ends of the soft copper foil 502 were soldered 505 to the positive electrode terminal member 504 on the surface side.

Further, in order to solder the soft copper foil at the center of the element on the back surface and the lead wire serving as the output terminal, a glass cloth 506 (thickness of 100) is provided between the insulating tape and the soft copper foil.
μm, 30 mm in both length and width) to provide a heat-resistant structure.

The method of taking out the negative electrode is as follows.

Double-sided tape (acrylic adhesive thickness 40μ)
m) through the soft copper foil 502 (thickness 100 μm, width 25 m)
m) was attached to the back surface of the photovoltaic element 503. Both ends of the soft copper foil were soldered 505 to the negative electrode terminal member 507 on the back side.

In order to solder the soft copper foil in the center of the back surface element and the lead wire as the output terminal similarly to the positive electrode side, a glass cloth 5 is provided between the photovoltaic element and the soft copper foil.
06 (100 μm thick, 30 mm in both length and width)
The structure was heat resistant.

(Preparation of Laminated Member of Surface Coating Material) The lamination member 312 of the surface coating material was prepared by the following method.

As the surface member 308, an ethylene-tetrafluoroethylene copolymer (ETFE) (thickness: 50 μm,
(Width 1000 mm) was used. A plasma treatment was applied to one surface, and a surface sealing material 307 having a thickness of 460 μm was laminated on the same surface using an extruder and a T-die. Subsequently, a glass fiber nonwoven fabric (acrylic binder, wire diameter 10 μm, fiber length 13 m) is used as the surface protection reinforcing material 306.
m and a basis weight of 40 g / m ² ) were prepared and bonded to the sealing material side of the laminate of the surface member 308 and the surface sealing material 307 using a heat roll.

(Coating Step) The coating step was performed using the apparatus shown in FIG. In addition, as the diaphragm 103,
A silicone rubber sheet (2.3 mm thick) was used.

First, a PFA film (thickness: 50 μm) is laid on the lower chamber 101 of the above-described apparatus to prevent contamination, and the back reinforcing plate 301 and the back covering material 3 thus prepared are provided.
11, the photovoltaic element 305, and the surface coating material 312 were laminated. Thereafter, the upper chamber 102 was lowered and the lid was closed. Vacuum was drawn by a vacuum pump until both the upper and lower chambers reached 6.7 × 10 ² Pa. Air is introduced into the upper chamber while the evacuation of the lower chamber is continued, and the pressure in the upper chamber is about 2 × 10 ⁵ Pa (2 atm).
Pressurized so that In this state, heating was performed by a heater incorporated in the lower chamber, and the temperature was raised to 175 ° C., and then the product was taken out. Thus, a plurality of solar cell modules were obtained.

The obtained solar cell module was evaluated by the following method.

(Appearance After Coating) The appearance of the solar cell module after coating was visually evaluated. The evaluation results are shown in Table 1 based on the following evaluation criteria. ○: No defects in appearance such as air bubbles ×: Defects in appearance such as air bubbles

(Durability to Temperature and Humidity Changes) With respect to the steel sheet bonded with the solar cell module,
A temperature / humidity cycle test of 85 minutes / 85% RH / 22 hours for 30 minutes was repeated 50 times. The test was performed by tilting the steel plate to which the solar cell module was attached at 45 °.
The appearance of the solar cell module after the test was visually evaluated. The evaluation results are shown in Table 1 based on the following evaluation criteria. ○: no change in appearance ×: peeling occurred

(High Temperature and High Humidity Test) The solar cell module was exposed to high temperature and high humidity of 85 ° C./85% RH / 2000 hours. The evaluation of the change in appearance of the solar cell module after the test and the insulation were measured.

The evaluation results on the appearance are shown in Table 1 based on the following evaluation criteria. ○: no change in appearance ×: peeling or the like

The insulation was measured by Surfa of UL1703.
The ce Cut test was performed. As shown in FIG. 6, this is performed by moving a steel blade 601 (thickness 0.64 mm) in the direction of arrow D while applying a load to damage the surface of the solar cell module, and perform a dielectric strength test of the damaged solar cell module. Is what you do. The scratch was made across the current collecting electrode. Specifically, first, the positive electrode and the negative electrode of the solar cell module are short-circuited. An aqueous solution having an electrical conductivity of 3500 ohm · cm or more (trade name: Triton X- manufactured by Rohm and Hearts Inc. as a surfactant)
100 containing 0.1% by weight). At this time, the wound is immersed in the aqueous solution without immersing the output terminal of the solar cell module in the aqueous solution. Immerse the negative electrode of the power supply in the aqueous solution side and connect the positive electrode of the power supply to the output terminal of the solar cell module. A voltage of 2200 V is applied from a power supply, and the leak current is measured. If the leak current exceeds 50 μA, the test is rejected.

The evaluation result of the insulating property was obtained by Surface c
Table 1 shows the numerical values of the load when the leak current in the ut test exceeded 50 μA. That is, the larger the value, the better the insulation.

(Weather Resistance Test) A part of the solar cell module cut into a square of 100 mm was put into a sunshine weather meter, and 2,000 cycles were performed with 48 minutes of light irradiation and 12 minutes of rainfall as one cycle. The change in appearance of the solar cell module of the sample after the test was evaluated. The evaluation results are shown in Table 1 based on the following evaluation criteria. ○: no change in appearance ×: peeling or the like

(Example 2) The surface sealing material 307 of the surface coating material 312 was replaced with EMAA (ethylene-acrylic acid copolymer,
MFR25), and the surface protection reinforcing material 306 was removed. In the coating step, the pressure applied to the upper chamber was set to about 1.5 × 10 ⁵ Pa (1.5 atm). Example 1 was followed except for the above changes. Table 1 shows the evaluation results.
Shown in

(Example 3) The surface sealing material 307 of the surface coating material 312 was replaced with EMAA (ethylene-acrylic acid copolymer,
MFR 2.8) and pressurized pressure in the upper chamber was about 3 × 10
Example 2 was followed except that the pressure was changed to ⁵ Pa (3 atm). The evaluation results are shown in Table 1.

(Embodiment 4) The pressurizing pressure of the upper chamber was set to about 8 × 10
Example 1 was followed except that the pressure was changed to ⁵ Pa (8 atm). Table 1 shows the evaluation results.

Comparative Example 1 The pressure in the upper chamber was set to about 1 × 10 ⁵ P
Example 1 was followed except that a (1 atm) was used.
After the coating step, no evaluation was performed because of poor appearance.

[0065]

[Table 1]

[0066]

As described above, according to the present invention,
Even if there are relatively large irregularities on the photovoltaic element, and even if a glass fiber non-woven fabric is used as the coating material, sealing of the photovoltaic element can be performed in a shorter time while preventing poor filling of the coating resin. It is possible. As a result, it is possible to increase the productivity of a solar cell module that is excellent in durability against temperature and humidity changes, heat resistance, weather resistance, and the like.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing one configuration example of an apparatus used for a method of manufacturing a solar cell module according to the present invention.

FIG. 2 is a view for explaining a conventional method for manufacturing a solar cell module.

FIG. 3 is a schematic cross-sectional view of a solar cell module in an example.

FIG. 4 is a schematic configuration diagram of a photovoltaic element in an example.

FIG. 5 is a schematic configuration diagram of a back electrode extraction of a photovoltaic element in an example.

FIG. 6 is an explanatory diagram of a jig used in a surface cut test for measuring insulation of a solar cell module in an example.

[Explanation of symbols]

101 Lower chamber 102 Upper chamber 103 Diaphragm 104 Lower chamber intake / exhaust valve 105 Upper chamber intake / exhaust valve 201, 207 Support plate 202, 206 Gasket 203, 205 Frame material 204 Diaphragm 208 Screw 209 Lower chamber valve 210 Upper chamber valve Reference Signs List 301 Back reinforcing plate 302 Back sealing material 303 Back insulating material 304 Back sealing material 305 Photovoltaic element 306 Surface protection reinforcing material 307 Surface sealing material 308 Surface member 311 Laminated film of back covering material 312 Laminated member of surface covering material 400 A stainless steel substrate on which a back reflection layer, a photoelectric conversion semiconductor layer, and a transparent conductive layer are laminated 401 Insulating adhesive 402 Current collecting electrode 403 Positive terminal member 404 Negative terminal member 405 Insulating tape 501 Insulating tape 502 Soft copper foil 503 Photovoltaic element 504 Positive terminal member 505 Soldering 506 Glass cloth 507 Negative terminal member 601 Blade for Surface Cut test

Continuation of the front page (72) Inventor Ichiro Kataoka 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Hidetoshi Zenko 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. F term (reference) 5F051 AA05 BA14 BA18 CA15 CB21 CB30 DA04 FA02 GA02 GA06 JA04 JA05

Claims (4)

[Claims] 1. A method for manufacturing a solar cell module, comprising a coating step of coating at least a photovoltaic element with a coating material by a double vacuum chamber type laminator in which an upper chamber and a lower chamber are separated by a diaphragm. In the coating step, after the upper chamber and the lower chamber are evacuated in a state where at least the photovoltaic element and the coating material are stacked and arranged in the lower chamber, the upper chamber is set to a pressure greater than 1 atm. A method for manufacturing a solar cell module, comprising: 2. The method according to claim 1, wherein the pressure in the upper chamber is 1.2 to 6 atm. 3. An apparatus for manufacturing a solar cell module using a double vacuum chamber type laminator in which an upper chamber and a lower chamber are separated by a diaphragm, wherein at least a photovoltaic element and a coating material are laminated in the lower chamber. An apparatus for manufacturing a solar cell module, comprising a mechanism capable of adjusting the pressure of the upper chamber to a pressure greater than 1 atm after the upper chamber and the lower chamber are evacuated in the arranged state. 4. A mechanism capable of adjusting the pressure of the upper chamber to a pressure greater than 1 atm, the pressure of the upper chamber being adjusted to 1.2 atm.
The apparatus for manufacturing a solar cell module according to claim 3, wherein the mechanism is a mechanism for adjusting the pressure to 6 atm.