JPH11307791A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently utilize lights entering the regions among adjoining solar cells and improve the power generation efficiency. SOLUTION: This solar cell module is provided with a plurality of both- surface light incident type solar cells 1 which are arranged with an interval in distance in an ethylene vinyl acetate(EVA) layer 2, a glass plate 3 on the surface side of module to which more lights enter, and a light-transmitting sheet 4 whose surface has raggedness and which is made of EVA on the backside of module where less incident light enters. The incident lights which enter the region, in which the solar cell 1 exists from the surface and backsides of module through the glass plate 3 and the light-transmitting sheet 4, enter the surface and backsides thereof a they are in the solar cell 1. A part of incident light entering the region between the adjoining solar cells 1 and 1 from the surface side of module via the glass plate 3 is scattered by the light- transmitting sheet 4, and a part thereof enters the solar cell 1 from the backside thereof, and furthermore the other part thereof reflects on the boundary surface between the EVA layer 2 and glass plate 3 and enters the solar cell 1 from the surface side thereof.

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 having a plurality of double-sided light incident solar cells.

[0002]

2. Description of the Related Art A photovoltaic module having a plurality of photovoltaic cells is covered with a film that does not transmit light, and is covered with a single-sided light incident type in which light incident only from the front side of the photovoltaic cells is used for power generation. And a double-sided light incident type in which both the incident light from the front and back sides of the solar cell is used for power generation using a transparent film on the back surface. When both types of solar cell modules are installed under the same conditions and their electromotive force characteristics are examined, the double-sided light incident type solar cell module is about 5 to 10% less than the single-sided light incident type solar cell module. The result of the output improvement is obtained.

FIG. 12 is a sectional view of such a conventional solar cell module. In the figure, reference numeral 1 denotes, for example, forming an amorphous semiconductor layer on a substrate made of a crystalline semiconductor, forming a semiconductor junction between the crystalline substrate and the amorphous semiconductor layer, and forming a light-transmitting surface on the front side and the back side. This is a double-sided light incident type solar cell in which a conductive film and a collector electrode are formed, and a photoelectromotive force is generated by light incident from both the front and rear surfaces.

In a state where such a plurality of solar cells 1 are arranged with a predetermined distance between adjacent cells, the EV
A (ethylene vinyl acetate) layer 2 is embedded. A glass plate 3 made of tempered glass is provided on the front side of the EVA layer 2, and on the back side of the EVA layer 2,
A back film 40 that is entirely transparent or opaque is provided. In this case, when the incident light from the rear surface side is used for power generation, the entire rear surface film 40 is flat and transparent.
When the incident light from the back side is not used for power generation, the back surface film 40 that is flat and opaque on the entire surface is used.

[0005]

The arrows in FIG. 12 indicate the path of incident light in a conventional solar cell module using a back film 40 that is entirely transparent.
Light incident on the region where the photovoltaic cells 1 are present from the front side or the back side can be incident on the photovoltaic cells 1 and contribute to the generation of electromotive force. The light incident on the region between the matching solar cells 1 and 1 passes through the transparent back film 40 without incident on the solar cell 1. Therefore,
In a conventional solar cell module, light incident on a region between adjacent solar cells cannot be used effectively, and there is a problem that power generation efficiency is poor and output voltage is low.

The present invention has been made in view of such circumstances, and provides a solar cell module that can effectively use light incident on a region between adjacent solar cells and improve power generation efficiency. The purpose is to do.

[0007]

According to a first aspect of the present invention, there is provided a solar cell module including a plurality of double-sided incident type solar cells spaced apart from each other. It is provided on one light incident side.

According to a second aspect of the present invention, there is provided a solar cell module including a plurality of double-sided incident type solar cells which are spaced apart from each other. It is provided on the incident side.

According to a third aspect of the present invention, there is provided a solar cell module including a plurality of double-sided incident type solar cells which are spaced apart from each other. It is provided on the incident side.

According to a fourth aspect of the present invention, in the solar cell module according to the second or third aspect, in the light-transmitting member, the interval between the irregularities is less than one time the interval between adjacent solar cells.

According to a fifth aspect of the present invention, in the solar cell module according to the second or third aspect, the haze ratio of the light transmitting member is 20% or more.

According to a sixth aspect of the present invention, in the solar cell module according to the second aspect, a light reflecting member is provided in a part of the light transmitting member corresponding to a region between adjacent solar cells. .

According to a seventh aspect of the present invention, in the solar cell module according to the sixth aspect, the width of the light reflecting member is one to two times a distance between adjacent solar cells.

According to an eighth aspect of the present invention, in the solar cell module according to any one of the second to fifth aspects,
A portion corresponding to a region between adjacent solar cells is subjected to a larger convex processing than other portions.

According to a ninth aspect of the present invention, there is provided a solar cell module including a plurality of double-sided illuminated solar cells spaced apart from each other. A member and a light scattering member provided corresponding to a region between adjacent solar cells are provided on one light incident side of the module.

A solar cell module according to claim 10 is
In a solar cell module including a plurality of two-sided incident solar cells spaced apart from each other, light incident from one light incident side of the module and passing through the module is reflected into the module, and the other side of the module. A member provided on the other light incident side of the module is provided with a member that scatters light incident from the light incident side and enters the module.

In the solar cell module of the present invention, a light-transmitting member that scatters light, for example, a light-transmitting member having an uneven surface is provided on the back side, which is one light incident side of the module. Incident light that has passed between adjacent solar cells from the front side of the module is scattered by the translucent member on the back side, and a part of the scattered light is incident on the solar cells. Therefore, the incident light that has not been used in the conventional example can be effectively used, and the photoelectric conversion efficiency is improved.

If a light-transmitting member for scattering light is also provided on the front side of the module, incident light passing between adjacent solar cells from the back side of the module is also transmitted by the light-transmitting member on the front side. The light is scattered, and part of the scattered light is incident on the solar cell, and the photoelectric conversion efficiency is further improved.

In the solar cell module having the structure in which the light-transmissive member subjected to such unevenness processing is provided on the back side of the module, the interval between the unevenness in the light-transmissive member is less than one time the interval between adjacent solar cells. By setting the haze ratio of the light transmitting member to 20% or more, or by applying a large convex processing to the light transmitting member corresponding to the region between adjacent solar cells, The scattering effect can be increased.

Further, in a solar cell module having a structure in which a light-transmitting member subjected to such uneven processing is provided on the back side of the module, light is transmitted to a portion of the light-transmitting member corresponding to a region between adjacent solar cells. When the reflective member is provided, light passing between adjacent solar cells from the surface side of the module can be more efficiently incident on the solar cells. However, when the width of the light reflecting member is increased, light incident on the region where the solar cell is present from the back side of the module is blocked, so that the width is 1 to 2 times the interval between adjacent solar cells. good.

In another solar cell module of the present invention, a light reflecting member corresponding to a region where a solar cell is present and a light scattering member corresponding to a region between adjacent solar cells are provided on the back side of the module. Is provided. Incident light that has passed between adjacent solar cells from the front side of the module is scattered by the light scattering member on the back side, reflected by the light reflecting member, and then enters the solar cell from the back side. Therefore, the incident light that has not been used in the conventional example can be effectively used, and the photoelectric conversion efficiency is improved.

Still another solar cell module of the present invention is:
A member that reflects light that has passed through the module from the front side of the module and scatters incident light from the back side of the module is provided on the back side of the module. The incident light that has passed between the adjacent solar cells from the front side of the module is reflected by the member on the rear side, and then enters the solar cells from the rear side. Also, when the light goes straight, the light incident on the region between the adjacent solar cells from the back surface side of the module is scattered by the member and enters the solar cell from the back surface side. Therefore, the incident light that has not been used in the conventional example can be effectively used, and the photoelectric conversion efficiency is improved.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. In the following description, one light incident side of the module in the claims refers to the back side of the solar cell module. (First Embodiment) FIG. 1 is a sectional view of a solar cell module according to a first embodiment of the present invention. 1 in the figure
Is a double-sided light incident type solar cell, and a plurality of double-sided light incident solar cells 1 (thickness: 0.1 to 0.7 mm)
However, the EVA layer 2 (thickness: 0.2 to 3 m) is arranged in a state where adjacent cells are arranged with a predetermined distance (1 mm or more) therebetween.
m, refractive index: 1.5). Also, E
On the front side of the VA layer 2, a glass plate 3 (refractive index: 1.5) made of, for example, white plate tempered glass is provided.
On the back side of, for example, PET with uneven surface
(Polyethylene terephthalate) or PVF (polyvinyl fluoride) light-transmitting sheet 4 (thickness: 0.05
０．２0.2 mm, refractive index: about 1.5).

FIG. 2 is a structural view showing an example of a double-sided light incident type solar cell 1. In FIG. 2, reference numeral 11 denotes an n made of a crystalline semiconductor such as single crystal silicon or polycrystalline silicon.
It is a crystalline silicon substrate of the type. Crystalline silicon substrate 1
An i-type amorphous silicon layer 12 and a p-type amorphous silicon layer 13 are stacked in this order on one main surface (front surface) of the light-emitting element 1, and a light-transmitting material such as ITO is further formed thereon. A comb-shaped collector electrode 15 made of a conductive film 14 and Ag is formed. On the other main surface (back surface) of the crystalline silicon substrate 11, an i-type amorphous silicon layer 16 and an n-type amorphous silicon layer 17 are laminated in this order, and further thereon, for example, ITO And a comb-shaped collector electrode 19 made of Ag.

The solar cell module having such a structure is as follows.
A glass plate 3, an EVA sheet serving as an EVA layer 2, a plurality of solar cells 1, an EVA sheet serving as an EVA layer 2, and a light-transmitting sheet 4 subjected to unevenness are laminated in this order, and a heat-compression treatment is performed on the laminate. It is manufactured by applying and integrating. In addition, it is efficient to manufacture such a translucent sheet 4 having unevenness on the surface by embossing the flat EVA sheet with an unevenness processing roller having unevenness on the processing surface.

Next, how the incident light travels in the first embodiment will be described with reference to FIG. Incident light (arrow L _A ) incident on the region where the solar cell 1 is present from the surface side of the module via the glass plate 3 is directly incident on the solar cell 1 from the surface side. In addition, incident light (arrow L) incident on the region where the solar cell 1 is present from the back surface side of the module via the light transmitting sheet 4.
_B ) is partially scattered and directly enters the solar cell 1 from the back side thereof.

On the other hand, incident light (arrow L _C ) incident on the region between the adjacent solar cells 1 and 1, that is, the region where the solar cell 1 does not exist, from the front side of the module via the glass plate 3. Are scattered by the light transmitting sheet 4. Then, a part of the scattered light enters the solar cell 1 from the back side thereof. In addition, part of the scattered light is reflected at the interface between the EVA layer 2 and the glass plate 3 and then enters the solar cell 1 from the surface side.

As described above, not only the incident light from the front side and the back side of the module to the region where the solar cell 1 exists, but also the incident light to the region between the adjacent solar cells 1 and 1 generates electromotive force. , The photoelectric conversion efficiency is improved.
In the first embodiment, the output can be improved by about 2% as compared with the conventional example using the flat and transparent back film 40 shown in FIG.

Here, the relationship between the interval between the adjacent solar cells 1 and 1 and the interval between the irregularities formed on the translucent sheet 4 will be described. When the interval between the concavities and convexities is larger than the interval between the solar cells 1 and 1, as shown in FIG. 3, the width of the concave portion of the translucent sheet 4 becomes larger than the interval between the solar cells 1 and 1. The entire area between the solar cells 1 and 1 will be covered. In such a case, the adjacent solar cells 1
Most of the scattered light of the incident light (arrow L _D ) incident on the region between the two through the glass plate 3 from the surface side passes through the region between the solar cells 1 and 1 again, and the solar cell 1 Is not incident inside. As a result, the amount of scattered light that enters the solar battery cell 1 from the back side decreases. Therefore, it is desirable that at least one projection exists in the region between the solar cells 1 and 1. Therefore, the translucent sheet 4 that has been subjected to the unevenness processing is used so that the interval between the irregularities is less than one time the interval between the adjacent solar cells 1 and 1. If such a translucent sheet 4 is used, at least one convex portion always exists in the region between the adjacent solar cells 1 and 1, and the incident light from the surface side therebetween can be effectively used.

As described above, in order to scatter and reflect the light, it is desirable that the irregularities in the light transmitting sheet 4 be minute irregularities of the pattern. However, if the formation pitch is too narrow, it may become translucent (cloudy). In some cases, irregularities may be formed at a large pitch for aesthetic reasons. Even in such a case, the output is higher when the convex portion exists in the region between the adjacent solar cells 1 and 1.

Next, the relationship between the haze ratio of the light transmitting sheet 4 and the output characteristics will be described. The haze ratio (%) representing the degree of the light scattering effect is defined by the following equation (1), and the total transmittance (%) is defined by the average transmittance in the visible region (400 to 700 nm). Haze ratio = {(scattered transmittance of light) / (total transmittance of light)} × 100 (1) where scattered transmittance of light: (total transmittance) − (linear transmittance) Total transmittance of light : Transmittance for all transmitted light measured using an integrating sphere

FIG. 4 shows the haze ratio (horizontal axis) of the light transmitting sheet 4.
5 is a graph showing a relationship between the short circuit current Isc (vertical axis).
Until the haze ratio reaches 20%, the short-circuit current Isc increases as the haze ratio increases, and the haze ratio becomes 2%.
It can be seen that if it exceeds 0%, the short-circuit current Isc hardly changes. Therefore, the output characteristics can be further improved by using the translucent sheet 4 having a haze ratio exceeding 20%.

(Second Embodiment) FIG. 5 is a sectional view of a solar cell module according to a second embodiment of the present invention. 5, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. In the second embodiment, the surface side of the solar cell module is also subjected to unevenness processing similarly to the rear side. That is, in the second embodiment, the glass plate 3
The surface is not flat, but is subjected to unevenness processing. Other configurations are the same as those of the above-described first embodiment. The second embodiment can also be manufactured by the same thermocompression bonding as in the first embodiment.

Next, how the incident light travels in the second embodiment will be described with reference to FIG. Incident light (arrow L _E ) incident on the region where the solar cell 1 is present from the surface side of the module via the glass plate 3 is partially scattered and directly enters the solar cell 1 from the surface side. Incident. Also, the incident light (arrow L _F ) incident on the region where the solar cell 1 is present from the back side of the module via the light-transmitting sheet 4 is partially scattered and directly enters the solar cell 1. It is incident from the back side.

On the other hand, incident light (arrow L _G ) incident from the surface side of the module toward a region between the adjacent solar cells 1, that is, a region where the solar cell 1 does not exist.
Is scattered by the glass plate 3. Part of the scattered light is directly incident on the solar cell 1 from the surface side. Part of the straight light is scattered by the light transmitting sheet 4. Then, a part of the scattered light enters the solar cell 1 from the back side.

As described above, not only the incident light from the front side and the back side of the module to the region where the solar cell 1 exists, but also the incident light to the region between the adjacent solar cells 1 and 1 generates electromotive force. Therefore, the photoelectric conversion efficiency is improved, and light scattering / reflection occurs more frequently than in the first embodiment, thereby increasing the light confinement effect in the module. In the second embodiment, compared to the conventional example using the flat and transparent back film 40 shown in FIG.
% Can be achieved.

(Third Embodiment) FIG. 6 is a sectional view of a solar cell module according to a third embodiment of the present invention. 6, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In the third embodiment, for example, a high-reflection film 5 made of Ag (thickness: 100-5000 °). The high reflection film 5 is provided slightly larger than the region completely including the region between the solar cells 1 and 1. Other configurations are the same as those of the above-described first embodiment.

As a material for the high reflection film 5, a high reflection metal such as Au or Al can be used in addition to Ag. Also, PV
F, PET and other high-molecular materials that have been subjected to white processing
It may be used for the high reflection film 5.

Next, how the incident light travels in the third embodiment will be described with reference to FIG. Incident light (arrow L _H ) incident on the region where the solar cell 1 is present from the surface side of the module via the glass plate 3 is directly incident on the solar cell 1 from the surface side. In addition, the incident light (arrow L _I ) incident on the area where the high reflection film 5 is not provided from the back surface side of the module via the light transmitting sheet 4 is partially scattered and the solar cell 1
From the back side.

On the other hand, incident light (arrow L _J ) incident on the region between the adjacent solar cells 1 and 1, that is, the region where the solar cells 1 are not present, from the front side of the module via the glass plate 3. Is reflected by the high reflection film 5. Part of the reflected light enters the solar cell 1 from the back side thereof.

As described above, not only the incident light from the front side and the back side of the module to the region where the solar cell 1 exists, but also the incident light to the region between the adjacent solar cells 1 and 1 generates electromotive force. , The photoelectric conversion efficiency is improved.

Here, the relationship between the arrangement width of the high reflection film 5 and the output characteristics will be described. For light that is incident on the surface of the module substantially perpendicularly, the arrangement width of the high-reflection film 5 may be set to the same extent as the interval between the solar cells 1 and 1, but as shown in FIG. For the incident light (arrow L _K ) obliquely incident on the surface of the photovoltaic cell, an arrangement width larger than the interval between the solar cells 1 and 1 is required. However, if the arrangement width of the high-reflection film 5 is too large, the range in which light incident from the back side of the module is blocked is widened, and conversely, the output characteristics are considered to deteriorate.

FIG. 7 shows the arrangement width (horizontal axis) and the short-circuit current Isc (vertical axis) of the interval between the solar cells 1 and 1.
6 is a graph showing a relationship with the graph. Until the arrangement width of the high-reflection film 5 reaches twice the interval between the solar cells 1 and 1, the short-circuit current Isc increases as the arrangement width increases, and the arrangement width exceeds twice the cell interval. It can be seen that the short-circuit current Isc gradually decreases. Therefore, the output characteristics can be further improved by arranging the high reflection film 5 with a width of 1 to 2 times the interval between the solar cells 1 and 1.

(Fourth Embodiment) FIG. 8 is a sectional view of a solar cell module according to a fourth embodiment of the present invention. 8, the same portions as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In the fourth embodiment, in the light-transmitting sheet 4 whose surface is unevenly processed, the pattern of the unevenness is not uniform, and the solar cell 1 is located in a portion corresponding to the region between the solar cells 1 and 1. A convex portion 4a larger than the existing region is formed. Other configurations are the same as those of the above-described first embodiment.

The shape of the projection 4a formed corresponding to the region between the solar cells 1 and 1 may be sharp at the tip as shown in FIG. 8, or may be as shown in FIGS. ), The tip may be rounded.

The glass plate 3 and the EV to be the EVA layer 2
A sheet, a plurality of solar cells 1, E to be an EVA layer 2
VA sheet, light-transmitting sheet 4 that has been subjected to unevenness processing is laminated,
A solar cell module having such a structure is manufactured by subjecting the laminated body to heat and pressure bonding to be integrated. By pressing a pressing die having a protrusion against the light transmitting sheet 4, a large convex portion 4a is selectively formed corresponding to the region between the solar cells 1 and 1.

In the fourth embodiment, since such a large convex portion 4a is selectively formed on the portion of the light-transmitting sheet 4 where the scattering effect is required, the space between the adjacent solar cells 1 and 1 is formed. regions, i.e., from the surface side of the module in an area where the solar cell 1 is not present light incident through the glass plate 3 (arrow L _M), in comparison with the other embodiments, many more In addition to being able to scatter at a ratio, the probability of total reflection on the back side is increased.

(Fifth Embodiment) FIG. 10 shows a fifth embodiment of the present invention.
It is sectional drawing of the solar cell module by embodiment.
In FIG. 10, the same parts as those in FIG.
A description thereof will be omitted. In the fifth embodiment, for example, glass, polycarbonate, or the like is provided in the region between the adjacent solar cells 1 and 1 on the back surface side of the solar cell module.
A light scattering member 6 made of acrylic or the like is provided, and a reflection plate 7 made of, for example, heat reflection glass is provided in a region where the solar cell 1 exists. Other configurations are the same as those of the above-described first embodiment.

Next, how the incident light travels in the fifth embodiment will be described with reference to FIG. Incident light (arrow L _N ) incident on the region where the solar cell 1 is present from the surface side of the module via the glass plate 3 is directly incident on the solar cell 1 from the surface side. Also, incident light (arrow L _O ) incident on the region where the solar cell 1 is present from the back side of the module via the reflector 7.
Is directly incident on the back side of the solar cell 1.

On the other hand, incident light (arrow L _P ) incident from the surface side of the module toward the region between the adjacent solar cells 1 and 1, that is, the region where the solar cell 1 does not exist.
Is scattered by the light scattering member 6, and a part of the scattered light is reflected by the reflection plate 7 and then enters the solar battery cell 1 from the back surface side.

As described above, not only the incident light from the front side and the back side of the module to the region where the solar cell 1 exists, but also the incident light to the region between the adjacent solar cells 1 and 1 generates electromotive force. , The photoelectric conversion efficiency is improved.

(Sixth Embodiment) FIG. 11 shows a sixth embodiment of the present invention.
It is sectional drawing of the solar cell module by embodiment.
In FIG. 11, the same parts as those in FIG.
A description thereof will be omitted. In the sixth embodiment, a back material 8 (refractive index: about 1.5) made of, for example, polycarbonate, which is transparent and has high refraction, is provided on the back surface side of the solar cell module. The back material 8 has an uneven shape, and the pitch of the unevenness is half the arrangement pitch of the solar cells 1, and the position of the concave portion 8 a is a region between the adjacent solar cells 1 and 1. And the central part of each solar cell 1. Other configurations are the same as those of the above-described first embodiment.

Next, how the incident light travels in the sixth embodiment will be described with reference to FIG. Incident light (arrow L _Q ) incident on the region where the solar cell 1 is present from the surface side of the module via the glass plate 3 is directly incident on the solar cell 1 from the surface side. Also, incident light (arrow L _R ) incident on the region where the solar cell 1 is present from the back surface side of the module via the back material 8.
Are partially scattered and directly enter the solar cell 1 from the back side thereof.

On the other hand, incident light ( _arrow L _S ) incident from the surface side of the module toward a region between the adjacent solar cells 1, that is, a region where the solar cell 1 does not exist.
Is multiple-reflected by the back surface member 8, and the reflected light enters the solar cell 1 from the back surface side. In addition, incident light (arrow L _T ) incident from the back side of the module toward a region between the adjacent solar cells 1, that is, a region where the solar cell 1 does not exist, is scattered by the back material 8. Then, a part of the scattered light enters the solar cell 1 from the back side.

As described above, not only the incident light from the front side and the back side of the module to the region where the solar cell 1 exists, but also the incident light to the region between the adjacent solar cells 1 and 1 generates electromotive force. , The photoelectric conversion efficiency is improved.

[0056]

As described above, in the solar cell module according to the present invention, since the light transmitting member for scattering light is provided on the back side of the module, the light is incident between the regions between adjacent solar cells. In addition, the incident light that has not been used in the conventional example can be effectively used, and the photoelectric conversion efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a solar cell module (first embodiment) of the present invention.

FIG. 2 is a configuration diagram of a dual-incidence type solar cell.

FIG. 3 is a diagram showing an example of a pattern having poor irregularities on a light-transmitting sheet.

FIG. 4 is a graph showing the relationship between the haze ratio of the light-transmitting sheet and the short-circuit current in the solar cell module (first embodiment) of the present invention.

FIG. 5 is a sectional view of a solar cell module (second embodiment) of the present invention.

FIG. 6 is a sectional view of a solar cell module (third embodiment) of the present invention.

FIG. 7 is a graph showing a relationship between an arrangement width of a high reflection film and a short-circuit current in a solar cell module (third embodiment) of the present invention.

FIG. 8 is a sectional view of a solar cell module (fourth embodiment) of the present invention.

FIG. 9 is a view showing another pattern example of the convex portion of the light transmitting sheet in the solar cell module (fourth embodiment) of the present invention.

FIG. 10 is a sectional view of a solar cell module (fifth embodiment) of the present invention.

FIG. 11 is a sectional view of a solar cell module (sixth embodiment) of the present invention.

FIG. 12 is a cross-sectional view of a conventional solar cell module.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solar cell 2 EVA layer 3 Glass plate 4 Translucent sheet 4a Convex part 5 High reflection film 6 Light scattering member 7 Reflector 8 Back material

Claims (10)

[Claims] 1. A solar cell module comprising a plurality of double-sided incident solar cells spaced apart from each other, wherein a light-transmitting light-scattering member is provided on one light incident side of the module. module. 2. A solar cell module including a plurality of double-sided incident solar cells spaced apart from each other, characterized in that a light-transmitting member having an uneven surface is provided on one light incident side of the module. Solar module. 3. A solar cell module including a plurality of double-sided incident-type solar cells spaced apart from each other, wherein a light-transmitting member having an uneven surface is provided on both light incident sides of the module. Solar module. 4. The light-transmissive member according to claim 1, wherein an interval between the irregularities is:
The solar cell module according to claim 2, wherein the distance between the adjacent solar cells is less than one time. 5. A haze ratio of the light transmitting member is 20%.
The solar cell module according to claim 2 or 3, which is as described above. 6. A light reflecting member corresponding to a region between adjacent solar cells on a part of the light transmitting member.
The solar cell module as described. 7. The solar cell module according to claim 6, wherein a width of the light reflecting member is one to two times a distance between adjacent solar cells. 8. The solar cell according to claim 2, wherein a portion of the translucent member corresponding to a region between adjacent solar cells is subjected to a larger convex processing than other portions. Battery module. 9. A solar cell module including a plurality of double-sided incident solar cells spaced apart from each other, wherein a light reflecting member provided corresponding to a region where the solar cell is present, and a solar cell adjacent to the light reflecting member. A solar cell module, comprising: a light-scattering member provided corresponding to a region between the light-scattering members on one light incident side of the module. 10. In a solar cell module including a plurality of double-sided incident solar cells arranged at a distance, light incident from one light incident side of the module and passing through the module is reflected into the module, and A solar cell module, comprising: a member on the other light incident side of the module, a member that scatters light incident from the other light incident side of the module and enters the module.