JP3244243B2 - Solar cell module - 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, and more particularly to the reliability of a solar cell module having a back surface reinforcing material.

[0002]

2. Description of the Related Art In recent years, awareness of environmental problems has been increasing worldwide. Above all, there is a serious concern about the global warming phenomenon associated with CO ₂ emission, and the demand for clean energy is increasing more and more. Under such circumstances, at present, solar cells are particularly expected as a clean energy source due to their safety and ease of handling.

[0003] There are various types of solar cells. Typical examples are (1) crystalline silicon solar cells,
(2) polycrystalline silicon solar cells, (3) amorphous silicon solar cells, (4) copper indium selenide solar cells, (5) compound semiconductor solar cells, and the like.
Among them, thin-film polycrystalline silicon solar cells, compound semiconductor solar cells, and amorphous silicon solar cells can be made relatively large in area at relatively low cost.

[0004] Usually, the solar cell element is buried in a filler such as EVA (ethylene-vinyl acetate copolymer) in order to secure weather resistance. And are modularized. As a surface covering material of the solar cell module, a glass or a weather-resistant film such as a fluororesin film is used. In addition, as a backside reinforcing material, a weather-resistant, moisture-resistant film or a thin steel plate, for example, an unpainted galvanized steel plate or a polyester resin coated from the viewpoint of flexibility and hardness, in which an aluminum foil is sandwiched with a weather-resistant film. Steel plates and the like are used. Further, epoxy resin is actually used to increase the adhesiveness of a two-coat two-bake painted steel plate for undercoating, but is not used for a surface-coated surface requiring weather resistance.

When a solar cell module using a steel plate as described above is installed outdoors, it is desirable that the form can be changed by bending or the like if necessary. Since the force is weak, peeling may occur due to a temperature-humidity cycle test, a weather resistance test, or bending of the solar cell module.

[0006] Therefore, it is desired to increase the adhesive strength between the filler and the back reinforcing material to further improve the reliability and workability of the solar cell module.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and to provide a solar cell module having excellent adhesion between a back reinforcing material and a filler and excellent in long-term reliability.

[0008]

Solar cell module of the present invention In order to achieve the above object, according the solar cell module with the embedded solar cells filler on the back reinforcing member, is previously coated on the surface of the side in contact with the filler Formed by
Characterized by having an epoxy resin coat .

In the above structure, the epoxy resin is a bisphenol A type resin and has a molecular weight of 2,000 to 400.
0, and it is preferable to contain a pigment. The pigment is preferably selected from carbon black, titanium oxide, and iron oxide, and the thickness of the filler is preferably 300 μm or more. The solar cell is preferably a flexible solar cell, and the back surface reinforcing member is preferably a metal plate. The metal plate is preferably selected from the group consisting of a plated steel plate, titanium and stainless steel. In addition, the book
The solar cell module of the invention has a filler on the back reinforcing material.
Photovoltaic module with embedded solar cells
The back reinforcing material is provided on the surface in contact with the filler.
Epoxy tree formed by painting in advance
It has a grease coat, and the back reinforcing material is bent
It is characterized by the following.

[0010]

[Function] By coating the surface of the back reinforcement in contact with the filler with epoxy resin, the adhesiveness between the filler and the surface of the back reinforcement is improved, and between the filler at the end of the module and the surface of the back reinforcement. Peeling of the solar cell module is extremely reduced, and the long-term reliability and processability of the solar cell module are improved.

Further, by using a bisphenol A type resin as the epoxy resin, the adhesiveness of the solar cell module is further improved, and a more excellent solar cell module can be provided.

The use of a flexible solar cell allows the filler and the back reinforcing material to follow bending and the like.
Separation between the filler and the surface of the back reinforcing material is further reduced, and the reliability of the solar cell module is improved.

Furthermore, by increasing the thickness of the filler to 300 μm, the amount of ultraviolet rays reaching the epoxy resin can be reduced, and the reliability of the solar cell module is further improved.

[0014]

FIG. 1 is a schematic structural view of a solar cell module using the present invention.

FIG. 1 is a cross-sectional view of a solar cell module having a solar cell element 102, a filler 103, and a weather-resistant film 104 on a back surface reinforcing member 101.

The solar cell module of the present invention can be manufactured, for example, as follows.

A sheet-like filler such as EVA, a solar cell element 102, a filler, and a weather-resistant film 104 are successively stacked on the back-side reinforcing member 101, and defoamed under pressure.
By melting EVA at 0 ° C., the solar cell element 102 is melted.
Is sandwiched between the weather-resistant film 104 and the back surface reinforcing material 101 to obtain a solar cell module.

(Back surface reinforcing material) The back surface reinforcing material used in the present invention is a back surface reinforcing material coated with an epoxy resin in order to enhance the adhesion between the surface of the back surface reinforcing material and the filler.

Considering the workability of the solar cell module, it is preferable to use a metal plate for the back surface reinforcing material, and the type thereof is not particularly limited. For example, a plated steel plate such as a zinc iron plate or a galvanium steel plate, titanium, stainless steel, or the like. A steel plate and the like.

(Epoxy Resin Coat) The epoxy resin used for the surface coating of the backside reinforcing material in the present invention is not particularly limited.
Examples thereof include a type resin, a bisphenol F type resin, and an alicyclic epoxy resin, and a representative bisphenol A type resin is preferable in consideration of durability, adhesiveness, and the like. Among them,
Those having a molecular weight of 2000 to 4000 are preferred. Further, it is preferable that pigments such as carbon black, titanium oxide and iron oxide are added for improving weather resistance.

There is no particular limitation on the curing agent, and aliphatic polyamines, modified aliphatic polyamines, aromatic polyamines,
Modified aromatic polyamine, alicyclic polyamine, modified alicyclic polyamine, polyamidoamine, modified polyamidoamine, imidazole and derivatives thereof can be used.

Specifically, for example, an epoxy resin manufactured by Three Bond Co., Ltd., trade names: "2001", "2002"
H, "2003", "2016B", "2022", etc., with trade names: "2102B", "2103", "210"
4 "," 2105F "," 2105C "," 210
6, 2131B, 2131D, 2131
F "and" 2163 "and used in a predetermined ratio. In addition, the epoxy resin "EW-
2 "(one-pack type)," S / W-2214 "(one-pack type),
"XA7416" (one-pack type), "JA7437" (one-pack type), "1838B / A" (two-pack type; mixing ratio of this agent and curing agent = 4: 5), "S / W-2216B / A""," DP
-100 "(1: 1)," DP-110 "(1: 1),
"DP-190" (1: 1), "DP-PURE60"
(1: 1), "DP-270" (1: 1) and the like can also be used. Further, an epoxy resin manufactured by Yuka Shell Epoxy Co., Ltd., trade name: "Epikote" 812, 815, 8
27, 828, 834 and the like can be used, and the curing agent can be selected according to the required performance.

(Weather-Resistant Film) The weather-resistant film used in the present invention is required to have not only weather resistance, but also light-transmitting properties, low adhesion of dirt, mechanical strength and tensile strength. Corona discharge treatment may be performed on the surface of the adhesive with the filler so that the filler is easily adhered.

In general, fluororesins are more resistant to weathering,
Since it can be expected that the heat resistance is slightly inferior, it is also possible to add an antioxidant.

Taking the above factors into consideration, the type of the weather-resistant film is not particularly limited, but may be ETFE (polyethylene tetrafluoroethylene), polytrifluoroethylene,
Fluororesin films such as polyvinyl fluoride are exemplified. Above all, non-stretched ETFE is preferable.

(Filler) The properties required of the filler used in the present invention include weather resistance, thermoplasticity, heat adhesion, and light transmittance. Examples of the material include, but are not limited to, transparent resins such as EVA (vinyl acetate-ethylene copolymer), butyral resin, silicon resin, epoxy resin, and fluorinated polyimide resin. Among them, EVA is particularly preferred.

Although there is no particular limitation, vinyl trichlorosilane, NOL-24 (allyldichlorosilane resorcinol), vinylalkoxysilane, γ
It is preferable that a silane coupling agent such as -aminopropyltriethoxysilane is added. It is also possible to crosslink by adding a crosslinking agent to the filler. Further, in order to suppress light deterioration, it is desirable that an ultraviolet absorber is contained.

(Solar Cell Element) The type of the solar cell element of the present invention is not particularly limited, but is preferably a flexible solar cell, and particularly preferably an amorphous solar cell formed on a stainless steel substrate. It is a silicon semiconductor.

FIG. 2 is a schematic diagram showing an example of the structure. In this figure, 201 is a conductive substrate, 202 is a reflective layer, 203 is a semiconductor photoactive layer, 204 is a transparent conductive layer,
05 is a current collecting electrode.

The conductive base 201 serves as a base for the solar cell element and also serves as a lower electrode. Examples of the material include tungsten, stainless steel, aluminum, copper, titanium, a carbon sheet, a lead-plated steel sheet, a resin film having a conductive layer formed thereon, and ceramics.
On the conductive substrate 201, as a reflective layer 202, a metal layer,
Alternatively, it is preferable to form a metal oxide layer, or a metal layer and a metal oxide layer.
i, Cr, Mo, W, Al, Ag, Ni, etc. are used. As the metal oxide layer, for example, ZnO, Ti
O ₂ , SnO ₂ or the like is used. As a method for forming the metal layer and the metal oxide layer, a resistance heating evaporation method, an electron beam evaporation method, a sputtering method, or the like is used.

The semiconductor photoactive layer 203 is a portion that performs photoelectric conversion, and specific materials include pn junction type polycrystalline silicon, pin junction type amorphous silicon, and Cu.
InSe ₂ , CuInS ₂ , GaAs, CdS / Cu
₂ S, CdS / CdTe, CdS / InP, CdTe /
And a compound semiconductor such as Cu ₂ Te.

The semiconductor photoactive layer 203 may be formed by a method of forming a sheet of molten silicon or a heat treatment of amorphous silicon in the case of polycrystalline silicon, or a plasma CVD method using silane gas or the like in the case of amorphous silicon. In the case of a compound semiconductor, ion plating, ion beam deposition, vacuum evaporation, sputtering, electrodeposition, and the like can be used.

The transparent conductive layer 204 functions as an upper electrode of a solar cell, and is made of, for example, In ₂ O ₃ or Sn.
O ₂ , In ₂ O ₃ —SnO ₂ (ITO), ZnO, Ti
O ₂ , Cd ₂ SnO ₄ , a crystalline semiconductor layer doped with a high concentration of impurities, or the like is used. Examples of the formation method include resistance heating evaporation, sputtering, spraying, CVD, and impurity diffusion.

On the transparent conductive layer 204 , in order to efficiently collect current, a grid-like current collecting electrode (grid) 205
Is preferably provided. As a specific material of the collecting electrode 205 , for example, Ti, Cr, Mo, W, Al, A
g, Ni, Cu, Sn, or a conductive paste such as silver paste. As a method for forming the current collecting electrode 205 , sputtering using a mask pattern, resistance heating, a CVD method, a method in which an unnecessary portion is removed by etching after depositing a metal film on the entire surface and patterning is performed, or a grid directly formed by photo CVD. There are a method of forming an electrode pattern, a method of plating after forming a mask of a negative pattern of a grid electrode pattern, and a method of printing a conductive paste.

The conductive paste is usually silver in the form of fine powder,
A material in which gold, copper, nickel, carbon, or the like is dispersed in a binder polymer is used. As the binder polymer, for example, polyester, epoxy, acrylic,
Resins such as alkyd, polyvinyl acetate, rubber, urethane, and phenol are included.

A bus bar for further collecting and transporting the current collected by the grid electrode may be formed, and the bus bar may be made of Sn, solder-coated Cu, Ni, or the like. The connection of the bus bar to the grid electrode may be made with a conductive adhesive or solder.

(Method of Bending Solar Cell Module) The method of bending the solar cell module is not particularly limited. However, when the surface of the solar cell module is a weather-resistant film such as a fluororesin film and is easily scratched. Is
The mold of the bending machine for bending the solar cell module preferably uses a material that does not easily damage the surface of the solar cell module. For example, it can be folded by placing a weather-resistant film surface of a solar cell module on a soft mold such as urethane resin, and applying a force by applying a blade to a back surface reinforcing material. When a blade is applied to the weather-resistant film surface, it is preferable that the edge of the blade has a radius of curvature R of 3 mm or more.

[0038]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

(Example 1) This example describes a solar cell module manufactured using an amorphous silicon solar cell element formed on a stainless steel substrate and using a steel plate coated with an epoxy resin as a backside reinforcing material.

First, an amorphous silicon (a-Si) solar cell element shown in FIG. 3 was manufactured.

On the cleaned long stainless substrate 301 having a thickness of 0.1 mm, S
An Al layer (film thickness 500 nm) containing 1% of i and a ZnO layer (film thickness 500 nm) were sequentially formed.

Then, the SiH is formed by plasma CVD.
N-type a-Si layer using a mixed gas of ₄ and PH ₃ and H ₂ ,
An i-type a-Si layer is formed from a mixed gas of SiH ₄ and H ₂ by SiH
₄ and BF ₃ and H ₂ to form a p-type microcrystalline μc-Si layer, and an n-layer thickness of 15 nm / i-layer thickness of 400 nm / p
Layer thickness 10 nm / n layer thickness 10 nm / i layer thickness 80 nm
A tandem a-Si photoelectric conversion semiconductor layer 303 having a layer configuration with a / p layer thickness of 10 nm was formed.

Next, as the transparent conductive layer 304, In ₂ O ₃
A thin film (thickness: 70 nm) was formed by vapor deposition of In by a resistance heating method in an O ₂ atmosphere.

Subsequently, the long solar cell element was punched into a size of 30 cm in length × 15 cm in width by a press machine into a shape as shown in FIG. 4 to produce a plurality of solar cell elements.

Here, the cut surface of the solar cell element cut by the press machine is in a state where the solar cell element is crushed and the transparent conductive layer and the stainless steel substrate are short-circuited. Then, in order to repair this short circuit, the periphery 401 of the In ₂ O ₃ electrode of each solar cell element was removed as shown in FIGS. Here, the removal around the In ₂ O ₃ electrode is performed by removing the In ₂ O ₃
A selective etching agent (FeCl ₃ solution) that dissolves but does not dissolve the amorphous silicon semiconductor is screen-printed around In ₂ O ₃ slightly inside the cut surface of each solar cell element to dissolve In ₂ O ₃ in that portion did. Thereafter, the resultant was washed with water to form an element separation portion 401 of an In ₂ O ₃ electrode.

Further, the grid electrode 402 for current collection is
It was formed by the following procedure. A polymer-type silver-plated copper paste was pattern-printed on a transparent conductive layer of a solar cell by a screen printer, and this was adjusted to 200 ° C ± 20 ° C.
Heated in R heating furnace for 5 minutes. Next, cream solder is printed on the conductive paste by the same screen printing machine,
The cream solder was heated and melted in a reflow oven adjusted to a temperature of ± 10 ° C. Then, the solar cell was put into a shower of ion-exchanged water together with the solar cell for 5 minutes, and the flux contained in the cream solder was washed. Then, hot air at about 80 ° C. was applied to the electrode surface of the solar cell for about 5 minutes and dried.

Next, a tin-plated copper wire 403 is arranged as a bus bar so as to be perpendicular to the grid electrode, and then an adhesive silver ink 404 is dropped at the intersection with the grid electrode,
For 30 minutes, and the grid electrode and the tin-plated copper wire were connected. At this time, a polyimide tape 405 was attached below the tin-plated copper wire so that the tin-plated copper wire 403 did not contact the end surface of the stainless steel substrate.

Subsequently, after removing a part of the In ₂ O ₃ layer / a-Si layer in the non-power generation region of the amorphous silicon solar cell element with a grinder to expose the stainless steel substrate,
A copper foil 406 was welded to the portion with a spot welder.

Next, as shown in FIG. 6, the solar cell elements were connected in series by soldering the tin-plated copper wire 603 of the solar cell element 601 and the copper foil 604 of the solar cell element 602. Similarly, 13 solar cell elements were connected in series by soldering a tin-plated copper wire and a copper foil of adjacent solar cell elements.

The wiring for the positive and negative terminals was performed on the back side of the stainless steel substrate. FIG. 7 shows a backside wiring diagram of the solar cell elements connected in series. The wiring on the plus side is obtained by attaching a copper foil 702 on a green polyester tape 703 at the center of the thirteenth solar cell element 713,
Next, the copper foil 702 and the tin-plated copper wire 704 are soldered 70
6 was performed. The wiring on the minus side was performed by soldering 706 the first solar cell element 701 to the spot-welded copper foil 705. Reference numerals 707 and 708 denote portions on which solder is applied as electrode extraction portions, 707 denotes a minus terminal, and 708 denotes a plus terminal.

Finally, a back reinforcing material, a filler, a solar cell element 802 connected in series, a filler, and a weather-resistant film are laminated in this order, and the filler is melted at 150 ° C. using a vacuum laminator. As shown in FIG. 8, a solar cell module 801 in which a solar cell element was resin-sealed with a back surface reinforcing material and a weather resistant film was produced. Here, the back surface reinforcing material 803 is a steel plate (0.35 mm thick) coated with an epoxy resin (bisphenol A type resin),
No. 4 used EVA (ethylene-vinyl acetate copolymer weatherproof grade), and WEFE (ethylene tetrafluoroethylene) was used for the weather resistant film 805. In addition, the weather-resistant film is preliminarily subjected to a plasma treatment on the bonding surface in order to enhance the adhesiveness with EVA.

The following items were evaluated for the adhesiveness between the back reinforcing material and the filler of the solar cell module manufactured by the above method.

(1) Initial bond strength test JIS K 6854 “Adhesive peel bond strength test”
Then, the adhesive strength between the back surface reinforcing material and the filler interface was evaluated.

(2) Weather Resistance The solar cell module was put into a sunshine weather meter, accelerated weather resistance tests were performed by light irradiation and a rainfall cycle, and changes in the appearance of the interface between the back reinforcing material and the filler after 5000 hours were evaluated. did.

(3) Temperature cycle A temperature cycle test of −40 ° C./1 hour and 90 ° C./1 hour was performed 50 times.
The change in the appearance of the interface between the back reinforcing material and the filler was evaluated.

(4) Temperature / Humidity Cycle A temperature / humidity cycle test of −40 ° C./1 hour and 85 ° C./85% RH / 4 hours was performed for 20 cycles. Were evaluated for changes in appearance.

(5) Humidity Resistance The solar cell module is placed in an atmosphere of 85 ° C./85% RH, and the light receiving surface is irradiated with pseudo sunlight by a solar simulator, and the back surface reinforcing material of the solar cell module after 50 hours. Changes in the appearance of the filler interface were evaluated.

Example 2 A solar cell module was produced in the same manner as in Example 1 except that a phenol novolak type epoxy resin was used as the surface coating material of the back reinforcing material, and the same evaluation was performed. Was.

(Comparative Example 1) A solar cell module was produced in the same manner as in Example 1 except that a polyester resin was used as the surface coating material of the back reinforcing material, and the same evaluation was performed.

Comparative Example 2 A solar cell module was produced in the same manner as in Example 1 except that an unpainted galvanized steel sheet having no surface coating was used as the backside reinforcing material. An evaluation was performed.

Table 1 shows the evaluation results of the solar cell modules in Examples 1 and 2 and Comparative Examples 1 and 2. In the table,
The mark “X” indicates that peeling at the end of the solar cell module was observed. In addition, the circles indicate other good adhesive properties.

[0062]

[Table 1]

As is clear from Table 1, the solar cell module using the steel sheet coated with the epoxy resin has a large adhesive strength between the surface of the back reinforcing material and the filler, and the solar cell module using the polyester resin coated or unpainted steel sheet. It showed higher reliability than the battery module.

Example 3 The solar cell module of Example 1 was bent at the module end as shown in FIG. 9, and the above evaluations (2) to (5) were performed. Here, a bending machine manufactured by Amada was used for bending. In order not to damage the surface of the solar cell module when bending,
In the bending machine, the portion where the surface of the solar cell module was hit was bent using a urethane resin mold. In addition, a metal mold having a cutting edge with a curvature radius R of 3 mm was used for the upper mold.

Here, no bending damage due to the bending was observed at the bent portion on the surface of the solar cell module. The scratches at the bent portion were confirmed by applying oily magic to the bent portion, wiping with a solvent, and checking whether any scratches remained at the bent portion.

Example 4 The solar cell module of Example 2 was bent at the module end as shown in FIG. 9, and the above evaluations (2) to (5) were performed. Here, the bending was performed in the same manner as in Example 3, and no bending scratch was observed in the bent portion on the surface of the solar cell module.

Comparative Example 3 The solar cell module of Comparative Example 1 was bent at the module end as shown in FIG. 9, and the above evaluations (2) to (5) were performed. Here, the bending was performed in the same manner as in Example 3, and no bending scratch was observed in the bent portion on the surface of the solar cell module.

Comparative Example 4 The solar cell module of Comparative Example 2 was bent at the module end as shown in FIG. 9, and the above evaluations (2) to (5) were performed. Here, the bending was performed in the same manner as in Example 3, and no bending scratch was observed in the bent portion on the surface of the solar cell module.

Table 2 shows the evaluation results of Examples 3 and 4 and Comparative Examples 3 and 4. The mark “X” indicates that peeling at the end of the solar cell module was observed. In addition, the mark 印 indicates other favorable adhesiveness.

[0070]

[Table 2]

As is evident from Table 2, the solar cell module using the steel sheet coated with the epoxy resin showed high reliability even in the bending process.

(Comparative Example 5) The epoxy resin-coated steel sheets used in Example 1 having a filler adhered to the surface and those having no filler were evaluated in the above (2).
The surface coating conditions were compared.

In Comparative Example 5, choking occurred in the surface coating of the bare epoxy resin-coated steel sheet, whereas no change was observed in the epoxy resin-coated steel sheet having a filler adhered to the surface.

As shown in the above embodiment, high reliability can be obtained by coating the back surface reinforcing material with epoxy resin. The detailed mechanism is not clear at present, but the epoxy resin reacted with the curing agent has hydroxyl groups at regular intervals, and this hydroxyl group is used as a halogen atom, alkoxyne, acetoxin, etc. in the silane coupling agent in the filler. Reacts with the group to be hydrolyzed to generate a silanol group, and the silanol group itself reacts to form a siloxane,
This is considered to be due to the formation of silicone or the bonding to the inorganic surface to form a siloxane bond.

[0075]

According to the present invention, a solar cell module having improved adhesion between the filler and the surface of the back reinforcing material can be obtained, and the following effects can be obtained. (1) Although air may remain in the filler when the solar cell module is manufactured, the possibility is reduced. (2) In particular, the separation of the filler and the back surface reinforcing material at the module end is reduced, and the reliability of the solar cell module is improved. (3) The peeling between the filler and the back surface reinforcing material in the temperature / humidity cycle test or the weather resistance test is improved, and the reliability of the solar cell module is improved. (4) Water can be prevented from entering the interface between the surface of the back surface reinforcing material and the filler. (5) Separation of the filler and the back surface reinforcing material during bending or drilling of the solar cell module is reduced. (6) Separation between the filler and the back surface reinforcing material due to handling during installation is reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an example of a solar cell module of the present invention.

FIG. 2 is a schematic sectional view showing an example of the solar cell element of the present invention.

FIG. 3 is a schematic sectional view showing a solar cell element of the solar cell module of Example 1.

FIG. 4 is a schematic configuration diagram showing an a-Si solar cell element of Example 1.

FIG. 5 is a schematic sectional view showing an a-Si solar cell element of Example 1.

FIG. 6 is a schematic diagram showing a series connection of a-Si solar cell elements of Example 1.

FIG. 7 is a schematic diagram showing a back surface wiring of the solar cell module of Example 1.

FIG. 8 is a schematic diagram showing a solar cell module of Example 1.

FIG. 9 is a schematic view showing a solar cell module of Example 3.

[Explanation of symbols]

Reference Signs List 101 back reinforcing material, 102 solar cell element, 103 filler, 104 weatherproof film, 201 conductive substrate, 202 reflective layer, 203 semiconductor photoactive layer, 204 transparent conductive layer, 205 current collecting electrode, 301 stainless steel substrate, 302 back surface Reflective layer, 303 a-Si photoelectric conversion semiconductor layer, 304 In ₂ O ₃ thin film, 401 In ₂ O ₃ electrode removed portion, 402 grid electrode, 403,603 tinned copper wire, 404 adhesive silver ink, 405 polyimide tape, 406,604 Copper foil, 601,602 a-Si solar cell element, 701 Minus side solar cell element, 702 Copper foil, 703 Insulating polyester tape, 704 Tin plated copper wire, 705 Copper foil, 706 Solder, 713 Plus sun Battery element, 801 solar cell module, 802 solar connected in series Battery element, 803 Epoxy resin coated steel sheet, 804 EVA, 805 ETFE, 901 Solar cell module.

Continuation of the front page (72) Inventor Seiki Itoyama 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Takashi Otsuka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) reference Patent flat 4-343481 (JP, a) JP flat 4-349672 (JP, a) JP Akira 63-143879 (JP, a) (58 ) investigated the field (Int.Cl. ⁷ , DB name) H01L 31/04-31/078

Claims (10)

(57) [Claims] 1. A solar cell module having a solar cell buried in a filler on a backside reinforcing material , wherein the backside reinforcing material is previously coated on a surface in contact with the filler.
Having an epoxy resin coat formed by
Solar cell module, wherein the Rukoto. 2. The solar cell module according to claim 1, wherein the epoxy resin is a bisphenol A type resin. 3. The epoxy resin has a molecular weight of 2,000.
The solar cell module according to claim 1, wherein the number is from 4,000 to 4,000. 4. The solar cell module according to claim 1, wherein the epoxy resin contains a pigment. 5. The solar cell module according to claim 4, wherein the pigment is selected from carbon black, titanium oxide, and iron oxide. 6. The solar cell module according to claim 1, wherein the thickness of the filler is 300 μm or more. 7. The solar cell module according to claim 1, wherein the solar cell is a flexible solar cell. 8. The solar cell module according to claim 1, wherein the back surface reinforcing member is a metal plate. 9. The solar cell module according to claim 8, wherein the metal plate is selected from the group consisting of a plated steel plate, titanium, and stainless steel. 10. Thickness embedded in a filler on a back reinforcing material.
In a solar cell module having a solar cell, the back surface
The reinforcing material is applied in advance to the surface in contact with the filler.
With an epoxy resin coat formed by mounting
And the back reinforcing material is bent.
Solar module.