JPH06196739A - Solar battery module - Google Patents

Abstract

PURPOSE:To provide a solar battery module in which a scratch resistance of rugged parts on the surface of a solar battery module is maintained, but the amount of resin used as a surface coating material is reduced. CONSTITUTION:In a solar battery module 1 having, at a light receiving side thereof, a protective member for protecting a solar battery, the protective member is provided with at least more than two types of transparent filling materials 14 and 16 which are formed in different ranges and serve as a protective member. After the first filling material 14 has been formed on the entire, or at least a part of, areas where the light receiving side becomes rugged, a protective material is formed over the entire surface of the solar battery module 1 using the second filling material 16.

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 a solar cell module whose surface is covered.

[0002]

2. Description of the Related Art In recent years, solar cells have been enthusiastically researched as clean and non-depleting energy.

Among various solar cells, a thin film solar cell typified by amorphous silicon can be manufactured in a large area and the manufacturing cost is low. Furthermore, a module manufactured by using a flexible material such as stainless steel as the base material and sealing it with a polymer resin has excellent flexibility and can be easily formed into an arbitrary shape. For example, it has a wide range of uses, such as being installed on the roof of a building with a function as a roofing material, or being mounted on a deck portion of a yacht for charging a battery.

Here, FIGS. 3, 4 and 5 showing an example of a conventional amorphous silicon solar cell module are a plan view, a sectional view and a sectional view of an amorphous silicon solar cell, respectively. FIG.

This amorphous silicon solar cell module 1 is an example in which three amorphous silicon solar cell elements 1A, 1B and 1C having the same structure are connected in series and they are resin-sealed.

Each amorphous silicon solar cell element 1
The configurations of A, 1B, and 1C will be described using the amorphous silicon solar cell 1A as a typical example.

Amorphous silicon solar cell element 1A
Is a metal layer 22 formed by a method such as sputtering on a flexible stainless steel substrate 23, an amorphous silicon semiconductor layer 21 in which n, i, and p layers are sequentially formed by a method such as plasma CVD, and a resistance heating evaporation method. And a transparent electrode layer 15 formed by, for example, and these are laminated in order.

On the transparent electrode layer 15, three comb-shaped collector electrodes 2 made of silver paste or the like are formed in parallel with each other by a screen printing method, and each comb-shaped collector electrode 2 is arranged so as to be orthogonal to them. Are electrically bonded to each other by a conductive adhesive 4 and are electrically connected to each other. In addition, in the transparent electrode layer 15, the positive electrode and the negative electrode of each of the solar cell elements 1A, 1B, and 1C, that is, the transparent electrode layer 15 and the flexible stainless steel substrate are reliably separated in the vicinity of the peripheral edge thereof. An electrode separation part 10 is provided in which the layer 15 is peeled off. A stainless exposed portion 11 in which the flexible stainless steel substrate is exposed by grinding or the like on a part of the peripheral edge separated by the electrode separating portion 10.
Are formed. A metal foil 6A that serves as one of the connection electrodes (for example, the negative electrode) to the external circuit is attached to the exposed stainless steel portion 11 by spot welding. Further, one end of the bus bar electrode 3 is extended to the outside of the amorphous silicon solar cell element 1A, and the extended portion serves as the other connection electrode (for example, a positive electrode) with the external circuit. Further, the bus bar electrode 3 and the electrode separating portion 1
In order to prevent a short circuit with the peripheral edge of the transparent electrode layer 15 separated by 0, an insulating material 5 such as a polyimide tape is interposed between the bus bar electrode 3 and the peripheral edge where the bus bar electrode 3 is located. is there.

In the three amorphous silicon solar cells 1A, 1B and 1C having the above-mentioned structure, the bus bar electrode 3 of the amorphous silicon solar cell element 1A and the exposed stainless steel portion 11 of the amorphous silicon solar cell element 1B are formed by the metal foil 6B. Then, the bus bar electrode 3 of the amorphous silicon solar cell 1B and the stainless exposed portion 11 of the amorphous silicon solar cell element 1C are connected by the metal foil 6C, and are connected in series as a whole. The metal foil 6A attached to the exposed stainless steel portion 11 of the amorphous silicon solar cell 1A and the metal foil 6D attached to the bus bar electrode 3 of the amorphous silicon solar cell 1C serve as connection terminals to the outside as a negative electrode and a positive electrode, respectively. There is.

As shown in FIG. 4, three amorphous silicon solar cells 1A, 1B, and 1C are connected in series.
Is resin-sealed with a translucent filler 7 made of EVA (ethylene vinyl acetate copolymer) or the like, and its surface is covered with a translucent protective film fluororesin 8 made of weather resistant resin.

The back surface is covered with a metal reinforcing plate 12, a nylon sheet 9 is adhered to one surface of the metal reinforcing plate 12, and the other surface is covered with a soft poly resin for protecting the metal reinforcing plate 12. A vinyl chloride sheet 13 is attached, and the module end is fixed in an aluminum frame 17.

Here, the role of the translucent filler 7 will be described. In some cases, the surface of a solar cell module is subject to external stress such as an object such as a small stone hitting its surface. In that case, a protective material is required to protect the solar cell element from damage. At this time, the solar cell module of this conventional example does not have a protective material that is a translucent plate material in order to have flexibility. Therefore, the filler plays a role of this protective material and serves as a cushioning material to protect the solar cell element.

Regarding this point, the degree of protection of the filler required is that the UL standard includes a "scratch test" using the tester shown in FIG. 6, and it is considered that the test should be passed. To be

Specifically, the tester having the steel blade 13 shown in FIG. 6 moves the solar cell surface at a speed of 152.4 mm / s while applying a load 24 of 907 g. After passing an electrical test, the solar cell is judged to pass the test if there is no problem with the electrical performance of the solar cell.

Therefore, as shown in FIG. 5, in the conventional solar cell module, the filler 7 has a thickness of 1 m on the solar cell element.
Since the steel blade 13 is present at about m, the steel blade 13 serves as a cushioning material even if the surface of the solar cell is damaged by the steel blade 13 described above. The tip of 13 is on the surface of the solar cell element,
That is, it cannot reach the transparent electrode layer, the comb-shaped collecting electrode, the bus bar electrode, etc., and can pass the above-mentioned UL standard "scratch test" to prevent problems such as damage to the solar cell element and leakage to the outside. Was.

By the way, as shown in FIG. 5, when the surface of the solar cell is damaged by the steel blade 13 or the like as described above, the solar cell element is highly likely to be damaged. As can be considered, it is a convex portion or a concave portion on the surface of the solar cell module, which is a smooth surface occupying most of the area of the transparent electrode layer portion.

That is, a locally convex portion or a concave portion on the surface of the solar cell module is easily damaged as described above, and the portion is, for example, a bus bar electrode or the like. With such a conductive portion, the solar cell module is extremely damaged.

For this reason, the conductive portion which is locally convex or concave on the surface of a solar cell module such as a bus bar electrode is provided with a sufficient amount of the light-transmitting filler. You must protect it from the damage mentioned above.

Regarding the bus bar electrode, for example, various materials are usually used for the bus bar electrode, from a silver foil tape having a thickness of about 0.2 mm to a tin-plated copper wire having a diameter of about 0.5 mm. In a solar cell module using a tin-plated copper wire of about 0.4 mm, the thickness of the filler is 1 in order to prevent the bus bar electrode from being damaged by the steel blade 13.
About mm is required. On the other hand, in order to protect the surface of the conventional solar cell module described above from damage due to the same cause in the transparent electrode layer portion which is a smooth surface, the thickness of the filler is about 0.4 mm.

Here, in the solar cell module shown in the conventional example, a sheet-shaped filler having a uniform thickness is placed on the solar cell element, and is heated under pressure in a vacuum state to be fused. By doing so, the module is manufactured, and thus the thickness of the filler on the surface of the solar cell element is substantially uniform.

[0021]

However, as in the above-mentioned conventional method, it is necessary to provide a filler having a sufficient thickness to protect the bus bar electrode portion from damage, because the surface of the solar cell module such as the transparent electrode layer portion is provided. In addition, since the filler having a thickness larger than necessary is provided on the smooth surface, the thickness of the filler is increased as a whole module.

As a result, since the filling material is flammable, it becomes a fire prevention problem when a solar cell module is provided on the roof, and reduction of the flammable material is desired. Further, there is a problem in that the material cost of the filler more than the above-mentioned necessity directly increases the manufacturing cost of the module. or,
Reducing the packing material and weight of the module is important for each application.

In view of the above-mentioned drawbacks, the technical problem of the present invention is to reduce the amount of resin used for the surface protective material without lowering the scratch resistance for protecting the surface of the solar cell module from external objects. It is to provide a battery module.

[0024]

The present invention has been made to solve the above-mentioned problems, and in a solar cell module having a protective member for protecting a solar cell on the light receiving surface side, at least two or more types of protection are provided. At least one of the two or more kinds of protective members is formed only on a portion where the light receiving surface side is locally uneven, and the other protective material is the entire surface of the solar cell module. It is characterized in that it is formed.

Further, the portion where the light receiving surface side is uneven is
Recesses between solar cell elements, which occur when a solar cell module is produced by arranging a plurality of solar cell elements in series, a bus bar electrode provided on the solar cell elements, a convex section of a collecting electrode, and the solar cell A convex portion of a member for series-parallel connection of elements, a convex portion of a bypass diode portion provided in the solar cell element connecting portion, and a convex portion of a connecting member between the solar cell element and the positive and negative electrode terminals of the solar cell module. And a part including at least one of the parts.

[0026]

According to the present invention, at least two kinds of protective materials having different formation ranges of the protective member, for example, all or at least a part of the portion where the light receiving surface side is locally uneven at the time of forming the solar cell module, are provided. Since at least one of the protective materials is formed, the entire surface of the solar cell module is formed by the other protective material,
The amount of unnecessary protective material can be reduced, the amount of flammable resin used can be reduced, and the fire protection performance can be improved, while at the same time reducing the cost of the material cost. Can be done.

[0027]

[Embodiment example] (Concavo-convex portion on solar cell module surface)
Here, in the solar cell module of the present invention, the uneven portion on the surface of the solar cell module that locally forms the protective material is locally formed when the solar cell module is formed by arranging a plurality of solar cell elements in series. Recesses between the generated solar cell elements, bus bar electrodes provided on the solar cell elements, projections of the collecting electrode, projections of the series-parallel connection member, connection members between the solar cell element and the positive and negative electrode terminals of the solar cell module. Is the convex part of.

(Material of Protective Material Formed on Concavo-Convex Section) The condition of the protective material formed on the concavo-convex section of the solar cell module of the present invention is to smoothly cover the step between the concavo-convex section and the smooth section when the protective material is formed. Since it is preferable that it is a material having a certain amount of clay, and that it is a material that is not deformed or deteriorated when the protective material formed on the protective material is formed, as the material, EVA (ethylene vinyl acetate copolymer), silicone resin, acrylic silicone resin, epoxy resin, acrylic resin, fluororesin, butyral resin, urethane resin, polyphosphazene compound, silicon oxide compound and the like are considered. Further, powders such as silica and aluminum may be mixed with the above materials to suppress shrinkage at the time of curing and enhance strength.

(Material of Protective Material Formed on Entire Module Surface) The material condition of the protective material formed on the entire module surface of the solar cell module of the present invention does not significantly deteriorate the power generation efficiency of the solar cell element used. It is considered necessary to have a light-transmitting property, and examples of the material include EVA, silicone resin, acrylic silicone resin, epoxy resin, acrylic resin, fluororesin, butyral resin, urethane resin, polyphosphazene compound, silicon oxide. Compounds and the like are possible. However, a material different from the protective material for the uneven portion is selected.

(Type of Solar Cell Element) As the solar cell element of the solar cell module of the present invention, a solar cell which is inexpensive in manufacturing cost and excellent in impact resistance is preferable, and is made of stainless steel having bendability. Thin film amorphous silicon solar cells prepared by laminating semiconductor layers on a substrate are preferable, but amorphous silicon solar cells on other substrates and by the manufacturing method, single crystal and polycrystalline silicon solar cells, CuInSe2 / CdS, etc. It is also possible to use the compound semiconductor solar cell of.

(Method of Locally Forming Protective Material) In the solar cell module of the present invention, a method of locally forming a protective material such as a light-transmitting filler on the irregularities on the surface of the solar cell is described. (A) Forming method by screen printing (b) Forming method using dispenser (c) As shown in FIG. 7, a filler is placed on a release sheet 18 made of a material having poor adhesiveness such as fluororesin. 7
Is formed in a desired shape in advance, is placed on a desired component 19, and is fused by the heating member 20. (D) As shown in FIG. 8, a powdery filler 7 is placed on the surface of the solar cell element, and a release sheet 18 made of a material having poor adhesiveness such as a fluororesin is interposed between the solar cell element surface and The heating member 20 formed into a desired shape fuses the filler into a desired shape. Etc., and may be formed by a combination of the above forming methods.

(Locally Forming Range of Protective Material) In the solar cell module of the present invention, when the protective material is locally formed on a desired uneven portion, the present invention is not limited to a large forming range. It is not effective for reducing the amount of protective material used, which is the original purpose of. Therefore, the projected area a of the forming area of the filler is preferably 1.1 × b ≦ a ≦ 5 × b with respect to the projected area b of the constituent material of the desired uneven portion shown in FIG. 9, and 1.3 × It is more preferable that b ≦ a ≦ 3 × b.

(Thickness of Protective Material Formed on Concavo-Convex Section) In the solar cell module of the present invention, the thickness of the protective material formed on the concavo-convex section can be such that the protective material smoothly covers the step between the concavo-convex section and the smooth section. As preferred, FIG.
As shown in (b), the thickness h of the protective material is preferably 1.1 × g ≦ h ≦ 2 × g with respect to the desired level difference g between the uneven portion and the smooth portion.

[0034]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 and 2 are a plan view and a sectional view showing an embodiment of the solar cell module of the present invention. As a feature of the solar cell module of the present embodiment, after the translucent filling material 14 is provided as the first protective material only on the bus bar electrode portion 3, the first protective material and the type of the first protective material are provided on the entire surface of the solar cell module. A transparent filler 16 is provided as the second protective material, a transparent protective film 8 is provided as the third protective material, and three protective materials are provided. The other basic structure of the solar cell module is shown in the conventional example. It is the same as the solar cell module.

In this embodiment, a silicon resin, which is a translucent filler and harder than EVA, is provided on the bus bar electrode portion 3 with a thickness of c = 0.3 mm, and then the entire surface of the solar cell module is covered. EVA (ethylene vinyl acetate copolymer), which is a translucent filler, has a thickness of d = 0.4 mm, and a fluororesin film, which is a transparent protective film, has a thickness of 0.05 mm and is provided on the outermost surface. At this time, the formation range of the translucent filling material 14 is such that the outer diameter e = 0.
With respect to 4 mm, f = 1.2 mm, that is, the projected area is about three times the projected area of the bus bar electrode.

In this example, the method of locally mounting the transparent filler on the bus bar electrode 3 was carried out as follows.

First, a dispenser is used only on the bus bar electrode 3 and a silicon resin having a thickness of 0.3 mm is placed and cured. A 0.4 mm-thick EVA sheet and a fluororesin film 8 which is a transparent protective film were placed on the entire surface of the solar cell module, and heated under pressure in a vacuum state to form the solar cell module of this example. Is forming.
In the "scratch test" described in the conventional example, the solar cell module of this example formed in this way is usually made of silicon, which is a translucent filler having a thickness of 0.3 mm, on the bus bar electrode which is easily damaged. There is a resin and EVA that is a translucent filler with a thickness of 0.4 mm, and on other components that are not easily damaged, a 0.4 mm thick layer that is necessary and sufficient for protection Since EVA is mounted, it has the same level of scratch resistance as the conventional solar cell module.

Here, EVA 16 which is a translucent filler as the second protective material on the above-mentioned other constituent materials has a thickness of 1 mm in the conventional solar cell module, as compared with this embodiment. Then there is only 0.4 mm thickness. The fact that the thickness of this resin is 0.4 mm means that the standard value for conforming to the current "non-combustible material" for building materials is 0.3 m.
Even considering that the thickness is m to 0.4 mm or less, the fire protection performance is superior to the conventional solar cell module.

Further, the material cost of the filler for the above reduction is not required, and even if the material cost of the silicon resin which is the first light-transmissive filler provided on the bus bar electrodes is taken into consideration, the entire solar cell module is considered. The manufacturing cost is low.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 11 is a sectional view showing a second embodiment of the solar cell module of the present invention. The solar cell module of the present embodiment is characterized in that after the translucent filler 14 is provided as the first protective material only on the bus bar electrode portion 3, the same material as the first protective material is provided on the entire surface of the solar cell module. There are three protective materials having different weight ratios of constituent substances but different characteristics, the translucent filler 16 as the second protective material, and the transparent protective film 8 as the third protective material. The other solar cell modules have the same basic configuration as the solar cell module shown in the conventional example.

That is, in this embodiment, the first protective material and the second protective material are made of the same material, but have different characteristics by changing the weight ratio of the constituent substances. More specifically, as the first protective material on the bus bar electrode portion 3, one having a higher strength by increasing the weight ratio of ethylene in EVA as compared with the second protective material is c =
After providing a thickness of 0.6 mm, the entire surface of the solar cell module has a thickness of d = 0.4 mm, and the weight ratio of ethylene in the same EVA as the second protective material is made smaller than that of the first protective material. By lowering the melting point, a heat-curing process can be easily performed, and a fluororesin film as a transparent protective film having a thickness of 0.05 mm is further provided on the outermost surface. At this time, the formation range of the translucent filling material 14 as the first protective material is f = with respect to the outer diameter e = 0.4 mm of the bus bar electrode 3.
The projected area is 1.2 mm, that is, about 3 times the projected area of the bus bar electrode.

In the solar cell module of this embodiment thus formed, EVA having a thickness of 1 mm is usually provided on the bus bar electrode which is easily damaged, and other components which are not easily damaged are used. Since an EVA having a thickness of 0.4 mm, which is a necessary and sufficient amount for protection, is mounted, the scratch resistance is equivalent to that of the conventional solar cell module.

Therefore, EVA, which is the translucent filling material 16 as the second protective material on the above-mentioned other constituent materials, has a thickness of 1 mm in the conventional solar cell module.
In this embodiment, the thickness is only 0.4 mm, which is excellent in fireproof performance.

Further, the material cost of the above-mentioned reduced amount of the filler is not required, and the manufacturing cost of the solar cell module becomes low.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings.

FIG. 12 is a sectional view showing a third embodiment of the solar cell module of the present invention. The solar cell module of this embodiment is characterized in that the entire surface of the solar cell module is coated with a ceramic coating material 24 as a first protective material, and only on the bus bar electrode 3 as a second protective material a translucent filler material 14 is used. In addition, a transparent protective film 26 and three protective materials as a second protective material and a third protective material of a different type are further provided on the entire surface of the solar cell characteristic module, and the basic configuration of other solar cell modules is: This is the same as the solar cell module shown in the conventional example.

In this embodiment, the entire surface of the solar cell module is coated with a ceramic coating material 24 of silicon oxide compound having a thickness of 0.1 mm, and only the bus bar electrode 3 is coated with EVA which is a translucent charging material. = 0.5
The bus bar electrode 3 is formed to have a thickness of mm and a width g of 1.6 mm with respect to an outer diameter f of 0.4. As a transparent protective film, a fluororesin paint 26 is coated thereon with a thickness of 0.05 mm.

In this embodiment, the transparent filling material 14 is placed only on the bus bar electrode 3 by using a dispenser, and heat fusion is performed.

The coating layer of the ceramic coating material 24 having a thickness of 0.1 mm in this embodiment is a protective layer which is strong enough to protect the solar cell element from the steel blade 13 of the above-mentioned "scratch test". However, since the bus bar electrode 3 in the embodiment uses the tin-plated steel wire having the outer diameter of 0.4 mm, the coating of the ceramic coating material having the thickness of 0.1 mm may not be applied onto the bus bar electrode 3 in some cases. As described above, the locally convex portion is likely to be damaged in the “scratch test”. Therefore, it is not enough to coat the ceramic coating material on the busbar electrode 3 portion alone, and the 0.5 mm-thick transparent material is not enough. The optical filler 14 is provided.

Further, the outermost surface is protected by a transparent protective film made of a fluororesin paint, which protects it from dirt and the like.

In the embodiment, since the translucent filler 14 is provided only on the bus bar electrode 3, the fireproof performance is much better than that of the conventional example, and the filler material cost is very low. Even if the material cost of the ceramic coating material provided on the entire surface of the solar cell module is included, the manufacturing cost is lower than that of the solar cell module shown in the conventional example.

(Fourth Embodiment) A fourth embodiment of the present invention will be described below with reference to the drawings.

13 and 14 are a plan view and a sectional view showing a fourth embodiment of the solar cell module of the present invention.

The solar cell module of the present embodiment is characterized in that after the translucent filling material 14 is provided as the first protective material only between the solar cell elements and on the connecting material between the bus bar electrodes and the external terminals,
The first protective material, the second protective material 30 of a different kind, and the transparent protective film 8 and three protective materials are provided on the entire surface of the solar cell module, and the arrangement and materials of the collector electrode and the bus bar electrode are Other than that, the schematic structure is the same as that of the conventional solar cell module.

The collector electrode 2 was formed by screen printing a paste as in Example 1, but the bus bar electrode 27 was formed of a silver foil having a thickness of 0.15 mm. And the stainless steel substrate 23 with a conductive adhesive (not shown). By forming the module in this way, the area of the non-power generation portion 28 from the end portion of the solar cell element to the frame can be reduced as much as possible, and the portion of the module that does not generate power can be reduced and the module can be reduced in size as compared with the first embodiment. Can be formed. In this embodiment, a silicon resin, which is harder than EVA, is used as a translucent filler of the first protective material only between the solar cell elements and on the connecting material between the bus bar electrodes and the external terminals, and the thickness g = 0 of the solar cell element. After being provided with a thickness of h = 0.3 mm with respect to 0.2 mm, an acrylic silicon resin 30 as a second protective material with a thickness of d = 0.4 mm is provided on the entire surface of the solar cell module.
On the outermost surface, a fluororesin coating material having a thickness of 0.05 mm, which is a transparent protective film, is provided.

In the thus formed solar cell module of this embodiment, it is considered that the connection member between the solar cell elements and between the bus bar electrode and the external terminal is considered to be damaged by the above-mentioned "scratch test". However, a silicon resin having a thickness of 0.3 mm is provided on this portion for protection as described above. In the other portion, a necessary and sufficient amount of 0.4 mm thick acrylic silicon resin is provided. As a result, for the same reason as in Example 1, the solar cell module of this example has better fire protection performance than the conventional example, and the module manufacturing cost is low.

(Fifth Embodiment) A fifth embodiment of the present invention will be described below with reference to the drawings.

FIG. 15 is a plan view showing a fifth embodiment of the solar cell module of the present invention.

The solar cell module of this embodiment is characterized in that after the first protective material 31 is provided on the bus bar electrode and the bypass diode, the first protective material and the second protective material different from the first protective material are formed on the entire surface of the solar cell module. A protective material 30, a transparent protective film (not shown) as the third protective material, and three protective materials are provided, and the other configurations are the same as those of the conventional solar cell module.

Here, the role of the bypass diode 29 is as follows.

When only some of the solar cell elements enter the shadow, the elements in the shadow are applied with the total generated voltage from the other power-generating elements as a reverse bias and exceed the breakdown voltage of the elements. Will be destroyed. In order to prevent this, the bypass diode 29 is connected in parallel with the element in the opposite polarity direction.

This bypass diode has a thickness of 2 to 3 mm or more when a commercially available diode is used, and is likely to be damaged by the above-mentioned "scratch test".

Therefore, in the present embodiment, 0.3% epoxy resin is used as the first protective material on the bus bar electrode portion 3.
After providing the epoxy resin on the bypass diode 29 with a thickness of 3 mm and a thickness of 3 mm with respect to the thickness of the bypass diode 29 of 2 mm, the entire surface of the solar cell module has a thickness of d = 0.4 mm. The second protective material is an acrylic silicon resin, and the outermost surface is provided with a fluororesin which is a transparent protective film with a thickness of 0.05 mm.

The solar cell module formed in this manner was not damaged by the above-mentioned "scratch test", and for the same reason as in Example 1, the solar cell module of this example was compared with the conventional example. Good fire protection performance and low module manufacturing cost.

[0067]

As described above, the solar cell module of the present invention is a solar cell module having a protective material for protecting the solar cell on the light receiving surface side, and the solar cell module has at least two or more protective materials. For the part where the light receiving surface side is locally uneven when forming the module, all of it,
Alternatively, at least one of the protective materials is formed on at least a part thereof, and then the protective material is formed on the entire surface of the solar cell module by at least one of the protective materials. By, since it is possible to reduce the amount of unnecessary protective material used, it is possible to reduce the amount of flammable resin used, it is possible to improve the fire protection performance at the same time,
The material cost can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a solar cell module according to the present invention.

FIG. 2 is a sectional view showing the first embodiment.

FIG. 3 is a plan view showing an example of a conventional solar cell module.

FIG. 4 is a cross-sectional view showing an example of the conventional solar cell module.

FIG. 5 is a cross-sectional view showing an example of the conventional solar cell module.

FIG. 6 is a schematic view of a tester for a solar cell module.

FIG. 7 is a cross-sectional view showing an example of a method of locally providing a filler.

FIG. 8 is a cross-sectional view showing an example of a method of locally providing a filler.

FIG. 9 is a plan view showing an example of a solar cell module according to the present invention.

FIG. 10 is a sectional view showing an example of a solar cell module according to the present invention.

FIG. 11 is a cross-sectional view showing a second embodiment of the solar cell module according to the present invention.

FIG. 12 is a sectional view showing a third embodiment of the solar cell module according to the present invention.

FIG. 13 is a plan view showing a fourth embodiment of the solar cell module according to the present invention.

FIG. 14 is a sectional view showing the fourth embodiment.

FIG. 15 is a plan view showing a fifth embodiment of the solar cell module according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solar cell module 1A, 1B, 1C Solar cell element 2 Current collecting electrode 3,27 Bus bar electrode 4 Conductive adhesive 5 Insulating material 6 Metal foil 7, 14, 16, Translucent filler 8 Translucent protective film 9 Nylon sheet 10 Electrode separation part 11 Stainless exposed part 12 Metal reinforcing plate 13 Polyvinyl chloride sheet 15 Transparent electrode layer 17 Aluminum frame 18 Release sheet 19 Component material 20 Heating material 21 Amorphous semiconductor layer 22 Metal electrode layer 23 Stainless steel substrate 24 Ceramic coating Material 25 Load 26 Fluorine resin 28 Non-power generation part 29 Bypass diode 30 Acrylic silicon resin 31 Epoxy resin

Claims (2)

[Claims] 1. A solar cell module having a protective member for protecting a solar cell on a light-receiving surface side, which has at least two or more types of protective materials, and at least one of the two or more types of protective materials is A solar cell module, wherein the light-receiving surface side is formed only on a locally uneven portion, and the other protective material is formed on the entire surface of the solar cell module. 2. The part where the light-receiving surface side is locally uneven is formed between the solar cell elements when the solar cell module is produced by arranging a plurality of solar cell elements in parallel, and on the solar cell element. A bus bar electrode provided in, the convex portion of the current collecting electrode, the convex portion of the member for the series-parallel connection of the solar cell element, the convex portion of the bypass diode portion provided in the solar cell element connection portion, The solar cell module according to claim 1, which is a portion including at least one of a convex portion of a connecting member connecting the solar cell element and the positive and negative terminals of the solar cell module.