JP7116101B2 - solar panel - Google Patents

Description

The present invention relates to solar panels.

2. Description of the Related Art Conventionally, there has been known a plate-like member that is bent within a certain range by processing a plate-like member (see, for example, Patent Document 1). Patent Document 1 describes an electronic device in which a plurality of rectangular flat plate members are connected by bendable hinges. In this electronic device, gaps are formed at intersections of a plurality of hinge portions. The presence of hinges and air gaps allows the electronic device to bend over a range.

JP 2017-220555 A

In the electronic device described in Patent Document 1, since it is assumed that the flat plate member has flexibility, it is difficult to obtain flexibility even if the same structure is applied to a solar cell panel that is hard like single crystal silicon. . In addition, the electronic device of Patent Document 1 is not easy to manufacture because a plurality of flat plate members are connected by a plurality of hinges. Therefore, there is a problem of wanting to easily produce a bendable solar cell panel.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a flexible solar panel that can be manufactured relatively easily.

The present invention has been made to solve the above-described problems, and can be implemented as the following modes. A solar cell panel comprising a flat substrate and a plurality of flat single cells each fixed to a first surface of the substrate, wherein the substrate has the first surface, or Three or more linear grooves crossing each other are formed on a second surface opposite to the first surface, and the three or more grooves divide the substrate into a plurality of triangular regions. The plurality of single cells are arranged inside the plurality of triangular regions, respectively, and two of the three or more grooves forming the same length of the triangular region are located in the first It is bent in a state of mountain fold or valley fold with respect to the surface, and the groove constituting the remaining one side of the triangular region is bent with respect to the first surface in the valley fold or mountain fold opposite to the two grooves. bent in a state. A solar cell panel comprising a flat substrate and a plurality of flat single cells each fixed to a first surface of the substrate, wherein the substrate has the first surface, or Three or more linear grooves crossing each other are formed on a second surface opposite to the first surface, and the three or more grooves divide the substrate into a plurality of triangular regions. The plurality of unit cells are arranged inside the plurality of triangular regions, respectively, and the second surface is formed with two grooves forming two sides of the same length of the triangular regions. and the groove forming the remaining side of the triangular area is formed in the first surface. In addition, the present invention can also be implemented as the following modes.

(1) According to one aspect of the present invention, a solar panel is provided. This solar cell panel includes a flat substrate and a plurality of flat single cells each fixed to a first surface of the substrate, and the substrate has the first surface or the Three or more linear grooves crossing each other are formed on a second surface opposite to the first surface, and the three or more grooves divide the substrate into a plurality of triangular regions. and the plurality of unit cells are arranged inside the plurality of triangular regions, respectively.

According to this configuration, a total of three or more non-parallel linear grooves are formed on the first surface or the second surface of the flat substrate. The thickness of the substrate in the portion where the groove is formed in the substrate is thinner than in other portions. Thereby, the portion in which the groove is formed can be bent along the straight line along which the groove extends. The unit cells are arranged in triangular regions divided by grooves along a surface direction perpendicular to the thickness direction. Therefore, even if the substrate is bent along the groove, the single cell itself is not bent and can be bent as a solar cell panel. As a result, the solar cell panel having this configuration can be bent by forming grooves in the substrate. That is, the solar cell panel of this configuration is bendable and can be manufactured relatively easily.

(2) In the solar cell panel of the above aspect, the three or more grooves may divide the substrate into the plurality of triangular regions having two or more sides of the same length.
According to this configuration, at least two of the three sides forming the divided triangular regions have the same length, so the degree of freedom of the grooves formed in the substrate is improved.

(3) In the solar cell panel of the above aspect, the substrate may be divided into the plurality of triangular regions arranged over the entire surface.
According to this configuration, the substrate is divided into triangular regions by linear grooves over the entire surface. Therefore, the solar panel can be folded as a whole rather than partially.

(4) In the solar cell panel of the above aspect, two of the three or more grooves that form the same length of the triangular region are mountain-folded or valley-folded with respect to the first surface. and the groove forming the remaining side of the triangular region may be bent in a valley fold or a mountain fold opposite to the two grooves with respect to the first surface.
According to this configuration, the solar cell panel in a folded state can be folded into a polygonal shape centered on an axis perpendicular to the plane formed by the remaining one side.

(5) In the solar cell panel of the above aspect, the three or more grooves are formed on the first surface of the substrate, and two of the three or more grooves having the same length of the triangular regions are formed. The groove widths of the two grooves forming a side may be equal, and the groove width of the groove forming the remaining side of the triangular region may be different from the groove width of the two grooves.
According to this configuration, three or more grooves dividing the first surface into triangular regions are formed, and the groove width of the groove forming the remaining one side is different from the groove width of the other two grooves. The remaining side of the larger groove width or the other two groove widths are valley-folded, so that the distance between the facing single cells and between the substrates in the divided triangular regions is lower than in the case of mountain-folding. distance increases. Thereby, even if the solar cell panel is bent, it is possible to suppress the contact between the unit cells and between the substrates in the facing triangular regions.

(6) In the solar cell panel of the above aspect, two grooves forming two sides of the same length of the triangular region are formed on the second surface, and the triangular region is formed on the first surface. The groove forming the remaining side of the region may be formed.

It should be noted that the present invention can be implemented in various aspects, including, for example, a solar cell panel, a solar cell system, a power generation system, a method for manufacturing a solar cell panel, and a device for executing these devices and manufacturing methods. It can be implemented in the form of a computer program, a server device for distributing this computer program, a non-temporary storage medium storing the computer program, or the like.

1 is a schematic cross-sectional view of a solar cell panel as one embodiment of the present invention; FIG. FIG. 4 is a schematic top view of a substrate; It is the schematic which expanded the X1 cross section in FIG. FIG. 4B is a schematic cross-sectional view of the substrate in a state where the first groove is valley-folded along the longitudinal axis; FIG. 4A is a schematic perspective view of a folded substrate; FIG. 4A is a schematic perspective view of a folded substrate; FIG. 4 is a schematic diagram of a single cell cut out from an ingot; FIG. 4 is a schematic diagram of a single cell of a comparative example cut out from an ingot; FIG. 10 is a schematic top view of a substrate in the solar cell panel of the second embodiment; It is the schematic which expanded the X2 cross section in FIG. FIG. 10 is a schematic cross-sectional view of a state in which the substrate of the second embodiment is mountain-folded along the second groove; FIG. 10 is a schematic perspective view of the substrate of the second embodiment folded; FIG. 10 is a schematic perspective view of the substrate of the second embodiment folded; FIG. 5 is a schematic diagram of a single cell of the second embodiment cut out from an ingot IG; It is a schematic top view of the board|substrate in the solar cell panel of a modification.

<First Embodiment>
FIG. 1 is a schematic cross-sectional view of a solar cell panel 100 as one embodiment of the invention. A solar cell panel 100 shown in FIG. 1 is a panel that generates power from sunlight incident on a plurality of single cells 20 . As shown in FIG. 1, the solar cell panel 100 includes a flat substrate 10, a plurality of flat unit cells 20 arranged on the first surface 11 side, which is one surface of the substrate 10, and a unit cell. Electrical wiring 30 electrically connecting between cells 20 , layered sealing material 40 provided on first surface 11 of substrate 10 to fix single cell 20 and electrical wiring 30 , surface of sealing material 40 and a protective film 50 laminated on.

The substrate 10 of this embodiment is made of aluminum. A first groove 13 is formed in the first surface 11 of the substrate 10 . As shown in FIG. 1, the first groove 13 is centered on a longitudinal axis OL13 located at a depth h1 from the first surface 11 along the thickness direction (Z-axis direction) penetrating the substrate 10. It is a groove with radius r1. Longitudinal axis OL14 is the central axis of first groove 13 extending linearly. Although not shown in FIG. 1, other grooves are also formed on the second surface 12, which is the other surface of the substrate 10, and the details of the other grooves will be described later.

As the single cell 20, for example, a solar cell using monocrystalline or polycrystalline silicon, a solar cell using a compound semiconductor such as cadmium telluride or gallium arsenide, or the like can be adopted. The electrical wiring 30 is a copper wire connecting between two single cells. The sealing material 40 is made of EVA (ethylene vinyl acetate: ethylene vinyl acetate copolymer resin). The protective film 50 is made of ETFE (ethylene tetrafluoroethylen: polytetrafluoroethylene/ethylene copolymer resin) and has weather resistance.

The orthogonal coordinate system composed of the X-axis, Y-axis, and Z-axis shown in FIG. 1 corresponds to the orthogonal coordinate system shown in FIGS. The Z-axis is an axis parallel to the stacking direction of the substrate 10 and the unit cells 20, in other words, an axis parallel to the thickness direction of the substrate 10, and the upper side of the paper is defined as the positive direction. The X-axis and the Y-axis are axes parallel to the plane direction orthogonal to the stacking direction and are orthogonal to each other. The Y-axis is parallel to the longitudinal axis OL13 along which the first groove 13 extends.

FIG. 2 is a schematic top view of the substrate 10. FIG. In FIG. 2, a plurality of first grooves 13 formed on the first surface 11 of the substrate 10 are indicated by solid lines, and a plurality of second grooves 14 and third grooves 15 formed on the second surface 12 are indicated by solid lines. indicated by a dashed line. The multiple first grooves 13 are parallel linear grooves extending along the longitudinal axis OL13. Similarly, each of the plurality of second grooves 14 and the plurality of third grooves 15 is a parallel linear groove extending along each axis OL14, OL15. In this embodiment, when the second groove 14 and the third groove 15 are projected onto the first surface 11, the angle α1 between the longitudinal axis OL13 and the longitudinal axis OL14 is 45°. The angle α2 formed by the longitudinal axis OL13 and the longitudinal axis OL15 is 45°, which is the same as the angle α1. The angle α3 formed by the longitudinal axis OL14 and the longitudinal axis OL15 is 90°. Therefore, when the second grooves 14 and the third grooves 15 formed in the second surface 12 are projected onto the first surface 11, the three grooves 13 to 15 intersect each other. Further, in a state in which the second groove 14 and the third groove 15 are projected onto the first surface 11, the grooves 13 to 15 project the first surface 11 of the substrate 10 so that the longitudinal axes OL14 and OL15 have the same length. is divided into a plurality of triangular areas AR of isosceles right triangles forming two sides of .

The longitudinal axis OL13 of the first groove 13 formed in the first surface 11, the longitudinal axis OL14 of the second groove 14 formed in the second surface 12, and the longitudinal axis OL15 of the third groove 15 are Strictly speaking, it is a twist relationship that does not exist on the same plane parallel to the XY plane, but in this embodiment, each of the grooves 13 to 15 divides the substrate 10 into a plurality of triangular regions AR. The second groove 14 and the third groove 15 correspond to grooves forming two sides of the same length of the triangular area AR. The first groove 13 corresponds to a groove forming the remaining side of the triangular area AR.

FIG. 2 shows one unit cell 20 among the plurality of unit cells 20 arranged to correspond to each of the plurality of areas AR, and the illustration of the other unit cells 20 is omitted. Each of the plurality of single cells 20 of this embodiment has the same shape as the triangular single cell 20 shown in FIG. As shown in FIG. 2, each unit cell 20 is arranged to be positioned inside the triangular area AR with its orientation in the XY plane rotated around the Z axis. In other words, the size of the projected single cell 20 is smaller than the triangular area AR on the XY plane.

FIG. 3 is an enlarged schematic view of the X1 cross section in FIG. As shown in FIG. 3, the second groove 14 is a groove having a radius r2 centered on a longitudinal axis OL14 located at a depth h2 from the second surface 12 along the Z-axis direction. Therefore, the groove width of the second groove 14 is (r2×2). In this embodiment, the third groove 15 has the same shape as the second groove 14 along the longitudinal axis OL15. Moreover, in this embodiment, the depth h1 and the depth h2 are the same, and the radius r1 and the radius r2 are the same. Therefore, the shape of the first groove 13 with respect to the first surface 11 and the shape of the second groove 14 and the third groove 15 with respect to the second surface 12 are the same.

FIG. 4 is a schematic cross-sectional view of substrate 10 in a state where first groove 13 is valley-folded along longitudinal axis OL13. As shown in FIG. 4, when the substrate 10 is valley-folded along the groove 13, the single cell 20A fixed to the triangular area ARa via the sealing material 40 is fixed in position with respect to the triangular area ARA. state, it follows the position change of the triangular area ARA. Similarly, the single cell 20B fixed to the triangular area ARB via the sealing material 40 follows the position change of the triangular area ARB while its position relative to the triangular area ARB is fixed.

As shown in FIG. 4, since the distance connecting the unit cells 20A and 20B changes, the position of the electric wiring 30 connecting the unit cells 20A and 20B changes according to the change in the distance. Change. Each electric wiring 30 can change its shape and position within the sealing material 40 within a certain range.

5 and 6 are schematic perspective views of the folded substrate 10. FIG. 5 and 6, the first groove 13 is valley-folded along the Z-axis positive direction, and the second groove 14 and the third groove 15 are mountain-folded along the Z-axis positive direction ( The substrate 10 is shown valley-folded along the negative Z-axis direction. That is, the substrate 10 of the first embodiment is valley-folded with the grooves 13 to 15 as a reference. Therefore, the radius of curvature of each of the grooves 13 to 15 becomes small, and stress concentration in the groove portions becomes more pronounced. This reduces the force required to bend the substrate 10 . 5 and 6, the first groove 13 is shown as a solid line, and the second groove 14 and the third groove 15 are shown as a broken line for simplification.

In the substrate 10 shown in FIGS. 5 and 6, the longitudinal axis OL13 of the first groove 13 forms part of a regular polygon centered on an axis parallel to the X-axis. This regular polygon can be transformed into a regular polygon inscribed in a circle centered on an axis parallel to the X axis. That is, the solar cell panel 100 can be deformed into a shape close to a curved surface by bending the grooves 13 to 15 .

FIG. 7 is a schematic diagram of a single cell 20 cut out from an ingot IG. FIG. 8 is a schematic diagram of a comparative single cell 20z cut out from an ingot IG. As shown in FIG. 7, 14 unit cells 20 included in the solar cell panel 100 of the present embodiment are cut out from a disk-shaped ingot IG at the center OP. Assuming that the radius of the ingot IG is R1 and the length of the short side of the unit cell 20 is x1, the following formula (1) holds from the Pythagorean theorem.
(2×R1) ² =(x1) ² +(3×x1) ² (1)
With respect to the area SIG of the ingot _IG , the total area S20 of the 14 single cells ₂₀ cut out from the ingot IG is obtained by the following formula using the relationship of formula (1) and the circumference constant π (≈3.14). (2).

That is, in the case of the first embodiment, about 89% of the ingot IG can be used as the single cell 20 . On the other hand, as shown in FIG. 8, the single cell 20z of the comparative example is cut out as one square single cell from the ingot IG. Here, if the length of the short side of the unit cell 20z is x2, the area S _20z of the unit cell 20z of the comparative example cut out from the ingot _IG with respect to the area SIG of the ingot IG is given by the circumference ratio π It is represented by the following formula (3) using

Since the ingot IG after cutting is not used, it is preferable to reduce this arcuate portion in order to use more of the ingot IG. As shown in formulas (2) and (3), in the first embodiment, the single cell 20 is manufactured from the ingot IG with a larger area than in the comparative example. As a result, the manufacturing cost of the solar panel 100 can be reduced.

As described above, in the solar cell panel 100 of the first embodiment, three or more linear grooves 13 to 15 that cross each other are formed on the first surface 11 or the second surface 12 of the substrate 10. ing. Therefore, the thickness of the portion of the substrate 10 where the grooves 13 to 15 are formed is thinner than the other portions. As a result, the portions where the grooves 13-15 are formed can be bent along the longitudinal axes OL13-15 of the grooves 13-15. Also, the three grooves 13-15 divide the substrate 10 into a plurality of triangular areas AR. Each of the plurality of single cells 20 is arranged inside each triangular area AR. Therefore, even if the substrate 10 is bent along the grooves 13 to 15, the single cell 20 itself is not bent, and the solar cell panel 100 can be bent. As a result, solar cell panel 100 in which grooves 13 to 15 are formed in substrate 10 can be manufactured relatively easily in a bendable state.

Further, the grooves 13 to 15 of the first embodiment divide the substrate 10 into a plurality of triangular regions AR forming isosceles triangles. That is, since two of the three sides forming the triangular area AR have the same length, the flexibility of the grooves 13 to 15 formed in the substrate 10 is improved.

Further, the substrate 10 of the first embodiment has the first surface 11 in a state in which the second grooves 14 and the third grooves 15 formed in the second surface 12 are projected onto the first surface 11, and a plurality of grooves are formed on the first surface 11. It is divided into triangular areas AR. Therefore, the solar panel 100 can be folded as a whole rather than partially.

Further, among the three grooves 13 to 15 of the first embodiment, the first groove 13 is folded along the Z-axis positive direction by a valley fold, and the second groove 14 and the third groove 15 are bent in the Z-axis direction. It is folded in a mountain fold along the . Therefore, the solar cell panel 100 of the present embodiment can be folded into a polygon centered on an axis parallel to an axis perpendicular to the polygon formed by the first grooves 13 .

In addition, since the substrate 10 of the first embodiment is made of aluminum, the solar cell panel 100 can be bent along the grooves 13 to 15 while ensuring the strength of the substrate 10 .

In addition, the solar cell panel 100 of the first embodiment includes electrical wiring 30 that connects the unit cells 20, a sealing material 40 that fixes the substrate 10 and the electrical wiring 30 to the first surface 11 of the substrate 10, and a sealing material. and a protective film 50 laminated on the surface of the stopper material 40 . Therefore, the single cell 20 is firmly fixed to the first surface 11 by the sealing material 40 , and the single cell 20 is protected by the protective film 50 .

<Second embodiment>
FIG. 9 is a schematic top view of the substrate 10a in the solar cell panel of the second embodiment. The solar cell panel of the second embodiment differs from the solar cell panel 100 of the first embodiment in the second grooves 14a and the third grooves 15a formed in the substrate 10a. In accordance with this difference, the solar cell panel of the second embodiment differs in the shape of the triangular area ARa and the single cell 20a, and the other configuration and shape are the same as those of the solar cell panel 100 of the first embodiment. . Therefore, in the second embodiment, configurations and shapes different from those of the first embodiment will be described, and descriptions of configurations and shapes that are the same as those of the first embodiment will be omitted.

The second grooves 14a and the third grooves 15a in the second embodiment are formed on the first surface of the substrate 10a unlike in the first embodiment. That is, in the second embodiment, three grooves 13, 14a, 15a are formed on the first surface of the substrate 10a. As shown in FIG. 9, the angles α1a, α2a, and α3a formed by the longitudinal axis OL13 of the first groove 13, the longitudinal axis OL14a of the second groove 14a, and the longitudinal axis OL15a of the third groove 15a are the same 60 degrees. °. That is, the shape of the triangular area ARa divided in the second embodiment is an equilateral triangle. According to the shape of the triangular area ARa, the shape of the single cell 20a of the second embodiment on the XY plane is an equilateral triangle smaller than the triangular area ARa, as shown in FIG.

FIG. 10 is an enlarged schematic view of the X2 cross section in FIG. In FIG. 10, in addition to the X2 cross section of the substrate 10a, the first groove 13 for comparison is indicated by broken lines. As shown in FIG. 10, the second groove 14a is a groove having a radius r2a centered on a longitudinal axis OL14a located at a depth h2a from the second surface 12a along the Z-axis direction. That is, the second groove 14a of the second embodiment has a groove width (r2a×2) smaller than the groove width (r1×2) of the first groove 13. As shown in FIG. The third groove 15a of the second embodiment (not shown) has the same shape as the second groove 14a along the longitudinal axis OL15a.

FIG. 11 is a schematic cross-sectional view of a state in which the substrate 10a of the second embodiment is folded along the second grooves 14a. As shown in FIG. 11, in the substrate 10a that is mountain-folded at the second grooves 14a, the distance between the first surfaces 11a facing each other around the YZ plane including the longitudinal axis OL14a is equal to the distance between the grooves shown in FIG. Unlike 13, it is larger than before it is folded.

12 and 13 are schematic perspective views of the folded substrate 10a of the second embodiment. 12 and 13, it is valley-folded in the positive Z-axis direction along the first groove 13, and mountain-folded in the positive Z-axis direction along the second groove 14a and the third groove 15a. A substrate 10a is shown. 12 and 13, the grooves 13, 14a, 15a formed in the first surface 11a are simply shown as solid lines.

In the substrate 10a shown in FIGS. 12 and 13, as in the first embodiment, the longitudinal axis OL13 of the first groove 13 forms part of a regular polygon. Therefore, the solar cell panel of the second embodiment can be deformed into a shape close to a curved surface by bending each of the grooves 13, 14a, 15a.

FIG. 14 is a schematic diagram of the single cell 20a of the second embodiment cut out from the ingot IG. As shown in FIG. 14, six single cells 20a of the second embodiment are cut out from a disk-shaped ingot IG having a center OP. Here, the length of the short side of the unit cell 20a is x3. With respect to the area SIG of the ingot _IG , the total area S20a of the six single cells _20a cut out from the ingot IG is expressed by the following formula (4) using the circular constant π.

That is, in the case of the second embodiment, approximately 83% of the ingot IG can be used as the single cell 20a. Therefore, in the second embodiment, as in the first embodiment, the single cell 20a is manufactured from the ingot IG with a larger area than in the comparative example represented by FIG. 8 and formula (3) above. As a result, the manufacturing cost of the solar cell panel can be reduced.

As described above, three grooves 13, 14a and 15a are formed in the first surface 11a of the substrate 10a of the second embodiment. Among the three grooves 13, 14a and 15a, the groove width of the second groove 14a and the groove width of the third groove 15a are equal. Further, as shown in FIG. 10, the groove width (r1×2) of the first groove 13 is larger than the groove widths (r2a×2) of the second groove 14a and the third groove 15a. Therefore, in the first groove 13, the distance between the facing single cells 20a and the distance between the triangular regions ARa are larger than those of the second groove 14a and the third groove 15a which are mountain-folded. As a result, even if the solar cell panel 100 is bent and the first grooves 13 are valley-folded to reduce the groove distance, it is possible to suppress the contact between the facing single cells 20a and the triangular regions ARa.

<Modification of this embodiment>
The present invention is not limited to the above-described embodiments, and can be implemented in various aspects without departing from the scope of the invention. For example, the following modifications are possible.

Although an example of the foldable solar cell panel 100 has been described in the first and second embodiments, the configuration and shape of the solar cell panel 100 can be modified in various ways. For example, the shape of the substrates 10, 10a need not be rectangular as shown in FIGS. 2 and 9, but may be other shapes such as circles and hexagons. Moreover, a plurality of holes penetrating in the stacking direction (Z-axis direction) may be formed in the solar cell panel 100 . In the substrate 10 of the first embodiment, for example, through holes are formed at the intersections of the longitudinal axes OL13 to OL15 of the grooves 13 to 15 to prevent rainwater from accumulating on the protective film 50 and allow wind to escape. By doing so, the wind pressure acting on the panel can be reduced.

The single cells 20, 20a may be arranged inside the triangular areas AR, ARa. For example, the shape of the single cells 20, 20a may not be similar to the shape of the triangular regions AR, ARa, and may be a shape other than a triangle such as a circle or rectangle. Although both the triangular areas AR and ARa are divided as areas of the same size and shape, they may be formed as areas of different sizes and different shapes. Further, the divided triangular area AR in the first embodiment does not necessarily have to be an isosceles right triangle. Triangles with different angles α1, α2, and α3 may be used. For example, it may be a right triangle with three angles α1, α2, α3 of 30°, 60°, and 90°, respectively. Therefore, regarding the angles α1, α2, and α3, the triangular areas AR and ARa are formed not on the whole of the deformable substrates 10 and 10a but on some of them within the range where the triangular areas AR and ARa are divided into triangles. may

Four or more linear grooves may be formed in the first surfaces 11, 11a and the second surfaces 12, 12a of the substrates 10, 10a. For example, if there are four grooves and the solar panel is folded, all four grooves may be valley-folded or mountain-folded, or three grooves may be selectively folded and the remaining one groove It does not have to be folded. As shown in FIGS. 2 and 9, three or more linear grooves refer to three or more grooves that are not parallel to each other when projected onto the same plane. No straight lines are included.

The groove shape such as the groove width and groove depth of each groove can also be modified in various ways. FIG. 15 is a schematic top view of the substrate 10b in the solar cell panel of the modification. In the substrate 10b shown in FIG. 15, the three grooves 13, 14a and 15a of the substrate 10a of the second embodiment shown in FIG. It is formed as a first groove 13b, a second groove 14b and a third groove 15b. The substrate 10b of the modified example has the same configuration and shape as the substrate 10a of the second embodiment except for the grooves 13b, 14b, and 15b. Thus, each groove may be formed on either side (front side or back side) of the substrate. For example, a groove corresponding to one linear groove may be configured by a combination of opposing grooves formed on both sides of the substrate so as to extend in the same straight line. Further, the grooves formed on both surfaces, the grooves formed only on the front surface, and the grooves formed only on the back surface may be mixed.

Each of the grooves 13-15 of the first embodiment may have different groove widths and different groove depths. Further, for the groove shapes of the grooves 13, 14, 14a, 15, and 15a in the first and second embodiments, well-known shapes are adopted as long as they can be bent along the straight lines in which the grooves are formed. can. In the second embodiment, the groove widths of the grooves 13, 14a, and 15a differed depending on the direction in which the grooves 13, 14a, and 15a are bent. good.

Well-known materials can be used for each material of the substrates 10, 10a, the unit cells 20, 20a, the electric wiring 30, the sealing material 40, and the protective film 50. FIG. Among them, the material of the substrates 10 and 10a is preferably iron, stainless steel or resin other than aluminum. For example, substrates 10 and 10a may be composite plates of glass fiber, aluminum, iron, stainless steel, and resin. Moreover, the solar cell panel 100 may include members other than these structures, and for example, another layer may be formed between the sealing material 40 and the protective film 50 . On the other hand, the solar cell panel 100 does not need to have all of these configurations, and may not have the encapsulant 40 and the protective film 50, for example. In this case, the unit cells 20, 20a may be adhered to the substrates 10, 10a by an adhesive member.

The present aspect has been described above based on the embodiments and modifications, but the above-described embodiments are intended to facilitate understanding of the present aspect, and do not limit the present aspect. This aspect may be modified and modified without departing from the spirit and scope of the claims, and this aspect includes equivalents thereof. Also, if the technical features are not described as essential in this specification, they can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10, 10a, 10b... Substrate 11, 11a... First surface 12, 12a... Second surface 13, 13b... First groove 14, 14a, 14b... Second groove 15, 15a, 15b... Third groove 20, 20A, 20B, 20a Single cell 30 Electrical wiring 40 Sealing material 50 Protective film 100 Solar cell panel AR, ARA, ARB, ARa Triangular area h1, h2, h2a Depth OL13, OL14, OL14a, _OL15 , _OL15a ... Longitudinal axis OP... Center r1, r2, r2a, R1... Radius _{SIG, S20, S20a, S20z ...} Area x1, x2, x3... Length of side α1, α1a, α2, α2a, α3 , α3a... angle

Claims (7)

A solar panel,
a flat substrate;
a plurality of flat plate-shaped single cells each fixed to the first surface of the substrate;
with
three or more linear grooves crossing each other are formed in the substrate on the first surface or on the second surface located on the opposite side of the first surface;
the three or more grooves divide the substrate into a plurality of triangular regions;
The plurality of single cells are arranged inside the plurality of triangular regions ,
Of the three or more grooves,
the two grooves forming the same length of the triangular region are bent in a mountain fold or a valley fold with respect to the first surface;
The solar cell panel , wherein the groove forming the remaining side of the triangular region is bent in a valley fold or a mountain fold opposite to the two grooves with respect to the first surface . The solar panel according to claim 1 ,
The three or more grooves are formed on the first surface of the substrate,
Of the three or more grooves,
The groove widths of the two grooves forming two sides of the same length of the triangular region are equal,
The solar cell panel, wherein the groove width of the groove forming the remaining side of the triangular region is different from the groove widths of the two grooves. The solar panel according to claim 1 ,
Two grooves forming two sides of the same length of the triangular region are formed on the second surface,
The solar cell panel, wherein the groove forming the remaining side of the triangular region is formed on the first surface. A solar panel,
a flat substrate;
a plurality of flat plate-shaped single cells each fixed to the first surface of the substrate;
with
three or more linear grooves crossing each other are formed in the substrate on the first surface or on the second surface located on the opposite side of the first surface;
the three or more grooves divide the substrate into a plurality of triangular regions;
The plurality of single cells are arranged inside the plurality of triangular regions,
Two grooves forming two sides of the same length of the triangular region are formed on the second surface,
The solar cell panel, wherein the groove forming the remaining side of the triangular region is formed on the first surface. The solar panel according to claim 4 ,
Of the three or more grooves,
the two grooves forming the same length of the triangular region are bent in a mountain fold or a valley fold with respect to the first surface;
The solar cell panel, wherein the groove forming the remaining side of the triangular region is bent in a valley fold or a mountain fold opposite to the two grooves with respect to the first surface. The solar panel according to any one of claims 1 to 5 ,
The solar panel, wherein the three or more grooves divide the substrate into the plurality of triangular regions having two or more sides of the same length. The solar panel according to any one of claims 1 to 6,
The solar cell panel, wherein the substrate is divided into the plurality of triangular regions aligned over the entire surface.

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