Solar cell modules

Abstract

To provide solar cell module which can be applied to a wide range of three-dimensional curved surfaces, can reduce costs, and can also improve yield.SOLUTION: A solar cell module 100, 101, 102 includes: a sheet member; a cell group 1 which is disposed on the sheet member 2 or in the sheet member 2 in a planar manner, and in which a plurality of solar cells 10 are connected; and a collector electrode E connected to the cell group 1. A plurality of notches K0, K1, K2, K3 open to an outer peripheral part of the sheet member 2 are formed around the cell group 1 in the sheet member 2.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a solar cell module including a plurality of solar cells.

Background Art

[0002] In recent years, there has been a demand to install solar cell modules on three-dimensional curved surfaces that make up buildings, moving bodies, aircraft, etc. However, solar cell modules are generally deployed on a two-dimensional plane and usually have a form that does not bend. Also, even if they are bent, they only bend in one direction, so it has been difficult to install them on three-dimensional curved surfaces that bend in two or more directions. For this reason, for example, in Patent Documents 1 and 2, etc., after arranging and connecting a plurality of solar cells on a base material having a three-dimensional curved surface in advance, the whole is sealed with a laminator corresponding to such a curved surface, thereby producing a method for manufacturing a solar cell module corresponding to a three-dimensional curved surface. Also, a technique has been proposed in which a solar cell sheet is adhered to a substrate having a three-dimensional curvature, and a plurality of through cuts are formed in the sheet so as to be able to correspond to a three-dimensional curved surface to some extent (see, for example, Patent Document 3).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, conventional substrates with three-dimensional curved surfaces and special laminators are very expensive, and because sealing and cutting processes must be performed on the three-dimensional shape, the yield tends to be poor (low productivity). Moreover, in all conventional technologies, the outer periphery of the solar cell module is fixed and does not expand or contract, so the applicable three-dimensional curved surfaces are limited to those with extremely small curvature, which presents a challenge.

[0005] Therefore, this disclosure is made in view of these circumstances, and aims to provide a solar cell module that can be applied to a wide range of three-dimensional curved surfaces, can reduce costs, and can improve yield, that is, a solar cell module that is excellent in versatility, economy, and productivity. [Means for solving the problem]

[0006] To solve the above problems, a solar cell module according to an example of this disclosure comprises a sheet member, a group of cells arranged planarly on or within the sheet member and in which a plurality of solar cells are connected, and a current collector electrode connected to the group of cells. In addition, a plurality of notches are formed around the group of cells on the sheet member, which are open to the outer periphery of the sheet member.

[0007] In a solar cell module with this configuration, notches are formed on the outer periphery of the sheet material, preventing the cell groups from overlapping. As a result, the solar cell module as a whole is divided into multiple parts, including the outer periphery of the sheet material. While the outer periphery of the solar cell module would be fixed as a single unit without such notches, these parts separated by the notches can be individually and independently reshaped. Therefore, the entire solar cell module can be installed to conform to various three-dimensional curved surfaces without the need for special substrates or sealing devices such as laminators, as in conventional designs. Furthermore, if highly flexible solar cells are used in this case, the cell groups and, consequently, the solar cell module can be configured more flexibly, further improving the applicability of the solar cell module to three-dimensional curved surfaces. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic cross-sectional view showing an example of the configuration of solar cells in a solar cell module according to this disclosure. [Figure 2] This is a schematic plan view illustrating the concept of an example of a solar cell module according to this disclosure. [Figure 3] This is a schematic plan view showing an example of the configuration of the first embodiment of the solar cell module according to this disclosure. [Figure 4] This is a schematic plan view showing an example of the configuration of a second embodiment of the solar cell module according to this disclosure. [Figure 5] (A) and (B) are schematic plan views showing the shape of the notch in the second embodiment of the solar cell module shown in Figure 4. [Modes for carrying out the invention]

[0009] <Definitions of Terms, etc.> Hereinafter, a solar cell module according to a preferred embodiment of this disclosure will be described with reference to the attached drawings. For convenience, in this document, in a solar cell module, the direction in which each layer is stacked relative to the substrate will be referred to as "up," the opposite direction as "down," and the coordinate axis direction will be referred to as "up and down" (this may differ from the up and down shown in the figures). Also, the left side as seen in the figures will be simply referred to as "left side" or "left," and the right side as seen in the figures will be simply referred to as "right side" or "right." Furthermore, in this document, when each layer, or the semiconductor contained in each layer, is expressed by the name of a certain compound, it will include not only the pure compound itself, but also compounds doped with trace amounts of elements or chemical species, etc., to the extent that the properties of the compound are not lost. Also, in this document, since elements in each layer may exist in different oxidation states, all oxidation states will be referred to by the name of the element unless otherwise specifically stated. For example, "hydrogen element" and its chemical symbol "H" may mean hydrogen atom, hydrogen ion, hydride ion, hydrogen radical, hydrogen in a compound state, and hydrogen in its elemental state.

[0010] <Example of a solar cell configuration> Figure 1 is a schematic cross-sectional view showing an example of the configuration of a solar cell in a solar cell module according to this disclosure. As shown in Figure 1, the solar cell 10 has electrodes 11 and 13 and a power generation element layer 12 provided between them. A solar cell 10 having such a laminated structure typically generates electricity by receiving light from the upper side of the electrode 13. Furthermore, the solar cell 10 is configured as a highly flexible cell by the laminated structure shown below.

[0011] (electrode 11) The electrode 11 is composed of a conductive substrate 111 and a lower electrode layer 112 formed thereon. The material used to form the conductive substrate 111 is not particularly limited and can be, for example, a metal substrate such as titanium foil, stainless steel foil, or aluminum foil, or a conductive resin film. Its thickness is preferably, for example, about 10 to 500 μm, and more preferably about 30 to 100 μm. The lower electrode layer 112 is not particularly limited and can be, for example, a metal conductive layer made of Mo, Cr, Ti, etc., a conductive inorganic compound conductive layer other than metal, or a conductive organic compound conductive layer. The thickness of the lower electrode layer 112 is also not particularly limited and is preferably, for example, about 200 to 800 nm.

[0012] (Power generation element layer 12) The power generation element layer 12 is composed of a p-type hole transport layer 121, a light absorption layer 122, and an n-type electron transport layer 123, which are sequentially stacked on the lower electrode layer 112 of the electrode 11. The material for forming the p-type hole transport layer 121 is not particularly limited and includes, for example, inorganic compounds such as molybdenum selenide and molybdenum oxide, and organic compounds such as fluorene derivatives. These may be used individually or in combination of two or more. The thickness of the p-type hole transport layer 121 is also not particularly limited and is preferably, for example, about 20 to 100 nm. The material for forming the light absorption layer 122 is also not particularly limited and includes, for example, perovskite compounds such as (Cs,FA)PbI3, chalcopyrite compounds such as Cu(In,Ga)(Se,S)2, and kestellite compounds such as Cu2ZnSnS4. These may be used individually or in combination of two or more. The thickness of the light absorption layer 122 is not particularly limited, but is preferably about 1 to 5 μm. Furthermore, the material for forming the n-type electron transport layer 123 is not particularly limited, and examples include Zn(O,S,OH)x, CdS, In2S3, ZnTiOx, etc., and these may be used individually or in combination of two or more. The thickness of the n-type electron transport layer 123 is not particularly limited, but is preferably about 20 to 150 nm.

[0013] (electrode 13) The electrode 13 is composed of an upper electrode layer 131 and a grid electrode 132, which are sequentially stacked on the n-type electron transport layer 123 of the power generation element layer 12. The upper electrode layer 131 is not particularly limited and examples include transparent electrode layers such as ITO, IOH, FTO, ZnO:B, and ZnO:Al. The thickness of the upper electrode layer 131 is not particularly limited, but is preferably about 0.1 to 2 μm. The grid electrode 132 is not particularly limited and examples include a metal conductive layer made of Mo, Cr, Ag, etc., a conductive inorganic compound conductive layer other than metal, and a conductive organic compound conductive layer. The thickness of the grid electrode 132 is also not particularly limited, but is preferably about 5 to 50 μm.

[0014] <Conceptual configuration of a solar cell module> Figure 2 is a schematic plan view illustrating the concept of an example of a solar cell module according to this disclosure, and is a schematic configuration diagram of a solar cell module 100 comprising four cell groups 1, each consisting of two solar cells 10, 10. This figure is intended to explain the basic, simplified configuration of the solar cell module according to this disclosure; more specific and complex configurations will be described later with reference to Figures 3 to 5.

[0015] As shown in Figure 2, a solar cell module 100 as an example of the present disclosure has a sheet member 2 formed by bonding a front sheet and a back sheet with a sealing material, in which a cell group 1 comprising solar cells 10, 10 is arranged. In this sheet member 2, at least the sheet on the light-receiving surface side of the front sheet and the back sheet is translucent. Here, the cell group 1 is configured as a string in which two rectangular solar cells 10, 10 are joined in series via a conductive adhesive layer (conductive tape, etc.) not shown. Furthermore, the four cell groups 1 are divided into two groups, left and right, in the figure, and each group is connected in series by alternately arranged electrode pairs E1, E2. In other words, the current-collecting electrode E, which is composed of these multiple electrode pairs E1, E2, extends in a direction that intersects the connecting direction of the solar cells 10, 10 of the cell group 1 (the direction along the axis Jy in the figure). Furthermore, electrode pairs E1 and E2 are connected to the upper surface (which serves as the light-receiving surface) and lower surface of cell group 1, respectively, and both ends of the current-collecting electrode E are extended outwards towards the outer periphery of the sheet member 2 for each of the left and right groups of multiple cell groups 1. In addition, an edge seal 3 (edge ​​seal member) is provided along the outermost edge to integrate these two groups of cell groups 1 together. In the illustration, the solid lines of electrode pairs E1 and E2 indicate that they are visible on the upper surface, while the dashed lines indicate that they are not visible on the upper surface but are provided on the back side (the same applies to Figures 3 and 4 described later).

[0016] Furthermore, a plurality of cutouts K0 opened at the outer peripheral portion of the sheet member 2 are formed around the cell group 1 in the sheet member 2. In this example, the cutouts K0 are defined at the central portions of the respective sides of the sheet member 2 having a rectangular shape. Also, each cutout K0 has a wedge shape having a vertex on the central portion side of the sheet member 2 in a plan view, and the width WB on the outer peripheral portion side of the sheet member 2 is larger than the width WA on the central portion side of the sheet member 2. In other words, the cutout K0 is formed such that the width gradually increases from the central portion side to the outer peripheral portion side of the sheet member 2. Thereby, the solar cell module 100 is divided at a plurality of portions 20A to 20D at the outer peripheral portion of the sheet member 2 in a state where they are not completely separated.

[0017] The solar cell module 100 configured as described above can be easily manufactured, for example, by the following procedure. That is, first, the solar cells 10, 10 are joined in series to install the current collecting electrode E, and a power generation structure for the solar cell module 100 is prepared in advance. Next, the backsheet and the sealing material constituting the sheet member 2 are placed on an appropriate flat surface or the like in this order, and the power generation structure prepared in advance is installed at a predetermined position thereon, and the edge seal 3 is provided along the outer edge of the cell group 1. It is desirable to remove the sealing material in the region where the edge seal 3 is provided in advance. Next, the sealing material and the front sheet constituting the sheet member 2 are overlapped in this order thereon. Here too, it is desirable to place the sealing material avoiding the region of the edge seal 3. Next, the sheet member 2 is bonded using a normal sheet laminator or the like to seal the power generation structure in the sheet member 2. Then, using a cutting device such as an appropriate cutter, the predetermined position of the outer peripheral portion of the sheet member 2 is cut into a wedge shape in accordance with the shape of the cutout K0, thereby obtaining the solar cell module 100 having the cutout K0.

[0018] Here, the constituent members of the sheet member 2 (back sheet, front sheet, and sealing material), as well as the material and properties of the edge seal 3, are not particularly limited, and materials and thicknesses commonly used can be appropriately selected and used. For example, as the front sheet, ETFE, PMMA, PET, etc. with a thickness of 50 to 300 μm can be used, and as the back sheet, PET, etc. with a thickness of 50 to 300 μm can be used. Also, as the sealing material, EVA, polyolefin, silicone, etc. with a thickness of 50 to 400 μm can be used. Furthermore, as the edge seal 3, polyisobutylene, butyl rubber, etc. with a thickness of 300 to 800 μm can be used. In addition, the above manufacturing method using these constituent materials is similarly applicable to the solar cell modules 101 and 102 described later.

[0019] <First Embodiment of Solar Cell Module> Next, FIG. 3 is a schematic plan (top) view showing an example of the configuration of the first embodiment of the solar cell module according to the present disclosure. As shown in FIG. 3, as another example of the present disclosure, the solar cell module 101 has a plurality of cell groups 1 formed by connecting a plurality of solar cell cells 10 disposed in a sheet member 2 in which a front sheet and a back sheet are bonded together by a sealing material. Here, the cell group 1 is also configured as strings in which a plurality of rectangular solar cell cells 10 are joined in series via a conductive adhesive layer (not shown), similar to the solar cell module 100 shown in FIG. 2. In this example, a plurality of cell groups 1 are juxtaposed along a direction (direction along the axis Jy in the drawing) intersecting the connection direction of the plurality of solar cell cells 10 (direction along the axis Jx in the drawing).

[0020] Furthermore, the multiple cell groups 1 are further divided into two groups, left and right, as shown in the figure, and each of these groups is connected in series by alternately arranged electrode pairs E1 and E2. In other words, the current collecting electrode E, composed of these multiple electrode pairs E1 and E2, extends along the direction of the juxtaposition of the multiple cell groups 1 (along the axis Jy), as shown in Figure 3. And, for each left and right group of the multiple cell groups 1, one end of the current collecting electrode E (electrode pair E1, E2) is drawn out toward the outer periphery of the sheet member 2. Furthermore, an edge seal 3 is provided along the outermost edge of each cell group 1 so as to integrate these two left and right groups of cell groups 1 as a single unit.

[0021] Furthermore, around the cell group 1 in the sheet member 2, multiple notches K1 are formed between small groups composed of two cell groups 1,1, and are open to the outer periphery of the sheet member 2. In this example, as shown in Figure 3, the notches K1 are arranged at predetermined intervals (i.e., intervals approximately equal to the width of two cell groups 1) along the direction in which the multiple cell groups 1 are placed side by side (the direction along the axis Jy). Each of these notches K1, like the notches K0 described above, has a wedge shape with its apex on the central side of the sheet member 2 in a plan view, and its width on the outer periphery of the sheet member 2 is greater than its width on the central side of the sheet member 2. Thus, the notches K1 are also formed so that their width gradually increases from the central side to the outer periphery of the sheet member 2. In addition, the notches K1 in the two groups on the left and right of the cell group 1 are arranged facing each other. These multiple notches K1 divide the solar cell module 101 into five sections 21A to 21E (corresponding to the right group in the diagram) and five sections 21F to 21J, each corresponding to two adjacent cell groups 1,1, without completely separating them.

[0022] With the solar cell modules 100 and 101 configured as described above, the formation of notches K0 and K1 on the outer periphery of the sheet member 2 divides the solar cell modules 100 and 101 as a whole into multiple parts 20A to 20D and 21A to 21J, including the outer periphery of the sheet member. In the absence of such notches K0 and K1, the outer periphery of the solar cell module would be fixed as a single unit, whereas the parts 20A to 20D and 21A to 21J, separated by the notches K0 and K1, can be individually and independently shaped.

[0023] Therefore, without having to create a three-dimensional shape using special substrates or sealing devices as in the past, the entire two-dimensional solar cell module 100, 101 can be installed to conform to the shape of various three-dimensional curved surfaces. In this case, since the solar cell 10 is configured as a highly flexible cell, the cell group 1 and thus the solar cell module 100, 101 also possess flexible characteristics. This further improves the applicability of the solar cell module 100, 101 to three-dimensional curved surfaces. Furthermore, these factors make it possible to reduce the manufacturing cost of the solar cell module 100, 101 and improve the yield. In other words, the solar cell module 100, 101 of this disclosure makes it possible to significantly improve versatility, economy, and productivity for various three-dimensional curved surfaces compared to conventional methods.

[0024] Furthermore, in the solar cell module 101, a large number of cell groups 1 are densely arranged along a direction (axis Jy) that intersects the connection direction of the multiple solar cell cells 10, and a large number of notches K1 are provided along the axis Jy between predetermined cell groups 1 at predetermined intervals. Therefore, even if the solar cell module 101 is made more complex and larger, the solar cell module 101 is divided into a large number of parts 21A to 21J, thus providing sufficient applicability to three-dimensional curved surfaces.

[0025] Furthermore, in the solar cell module 101, the current collector electrode E extends along the direction of juxtaposition of multiple cell groups (axis Jy), making it easier to secure space for forming notches K1 between cell groups 1. This allows the solar cell module 101 to be effectively divided into numerous parts 21A to 21J, further enhancing its applicability to various three-dimensional curved surfaces and contributing to further improvements in economy and productivity.

[0026] Furthermore, in the solar cell modules 100 and 101, the notches K0 and K1 are formed in a wedge shape, where the width WB on the outer periphery of the sheet member 2 is relatively larger than the width WA on the central side of the sheet member 2. Therefore, depending on the curvature of the three-dimensional curved surface, even if the distance between the parts 20A-20D and 21A-21J separated by the notches K0 and K1 increases as you move away from the center of the solar cell modules 100 and 101, those parts can expand to cover the three-dimensional curved surface. This further enhances the applicability to three-dimensional curved surfaces, including cases where the curvature is relatively large or where the area to be covered increases.

[0027] Furthermore, in the solar cell modules 100 and 101, an edge seal 3 is provided along the outer edge of the cell group 1, which protects the outer periphery of each cell group 1 and makes it easier to handle the entire cell group 1 as a single unit. This further improves the productivity of the solar cell modules 100 and 101 and enhances the reliability of the product.

[0028] <Second Embodiment of Solar Cell Module> Figure 4 is a schematic plan (top) view showing an example of the configuration of a second embodiment of the solar cell module according to this disclosure. As shown in Figure 4, the solar cell module 102, another example of this disclosure, has multiple notches K2 and K3 instead of multiple notches K1, and is configured similarly to the solar cell module 101 shown in Figure 3, except that the multiple cell groups 1 and the multiple notches K2 and K3 extend radially from the central part of the sheet member 2 toward the outer periphery. That is, in the solar cell module 101, the multiple cell groups 1 and the multiple notches K1 were arranged parallel to each other, whereas in the solar cell module 102, the multiple cell groups 1 and the multiple notches K2 and K3 extend such that the angle from the horizontal increases as they move away vertically from the central part in the vertical direction shown.

[0029] Here, Figure 5 is a schematic plan view showing the shapes of the notches K2 and K3 in the solar cell module 102, and is a schematic diagram showing an enlarged portion of Figure 4 (the dimensional differences are slightly exaggerated for ease of understanding). As shown in Figure 5, in the solar cell module 102, multiple cell groups 1 extend radially, so the spacing between adjacent cell groups 1,1 is greater at the outer periphery side of the sheet member 2 in the vertical direction (axis Jy direction), i.e., the maximum spacing DS3 at the notch K3, than at the central side of the sheet member 2 in the vertical direction (axis Jy direction), i.e., the maximum spacing DS2 at the notch K2. Similarly, the spacing between adjacent notches K2 and K3 is greater at the outer periphery side of the sheet member 2 in the vertical direction (axis Jy direction), DK3, than at the central side of the sheet member 2 in the vertical direction (axis Jy direction). Furthermore, this configuration can be rephrased as follows: because the notches K2 and K3 are wedge-shaped, the vertex angle (interior angle) θ3 of notch K3 is larger than the vertex angle (interior angle) θ2 of notch K2.

[0030] Furthermore, due to the above-described configuration of the solar cell module 102, the current collector electrodes E provided between the left and right opposing cell groups 1,1 have a smaller spacing W3 on the outer periphery side of the sheet member in the vertical direction (axis Jy direction) than the spacing W2 on the central side of the sheet member in the vertical direction (axis Jy direction).

[0031] In the solar cell module 102 configured as described above, the same effects and advantages as those of the solar cell modules 100 and 101 described above are achieved. Furthermore, in the solar cell module 102, multiple cell groups 1 and multiple notches K2 and K3 extend radially from the central part to the outer periphery of the sheet member 2. As a result, the dimensions between the cell groups 1, between the notches K2 and K3, and the current collector electrode E have the relative size relationship described above. Therefore, even if the distance between the parts 22A to 22J separated by the notches K2 and K3 increases further as you move away from the central part of the solar cell module 102, depending on the curvature of the three-dimensional curved surface, these parts can further expand to cover the three-dimensional curved surface. As a result, the applicability to three-dimensional curved surfaces can be further enhanced, including when the curvature is even greater or when the area to be covered is even larger.

[0032] The examples and embodiments described above are provided to facilitate understanding of this disclosure and are not intended to limit it. Furthermore, the elements, their arrangement, materials, conditions, shapes, dimensions, scale, etc., of each embodiment are not limited to those illustrated or shown unless otherwise specified, and can be modified as appropriate within the scope of the gist of this disclosure. Moreover, the configurations of each embodiment can be combined with each other.

[0033] For example, the solar cell 10 may have layers other than those described above, or it may have multiple layers of each of those described above. In addition, each layer constituting the solar cell 10 may contain various additives such as binders and surfactants in addition to the main constituent materials described above. Furthermore, the p-type hole transport layer 121 and grid electrode 132 of the solar cell 10 are not required, and two or more light absorption layers 122 may be provided. Moreover, the applications of the solar cell modules 100, 101, and 102 are not particularly limited, and for example, they can be preferably used as power generation devices attached to roofs, windows, and walls of buildings, mobile bodies, aircraft, etc., particularly for three-dimensional measurement. In addition, they can also be suitably used as independent power supply devices for streetlights, sensors, and digital signage, mobile energy devices, and power generation devices in space or the stratosphere.

[0034] Furthermore, instead of connecting multiple cell groups 1 in series by current collector electrodes E, each including a portion located in the center of the solar cell module, multiple cell groups 1 may be connected in parallel. In addition, the total number of solar cells 10 constituting cell group 1 and the number of rows can be arbitrarily selected. Furthermore, the number of juxtaposed cell groups 1 and the number of notches K0, K1, K2, K3 can also be any number. Moreover, the edge seal 3 is not mandatory and may not be provided, and the edge seal 3 may extend to the outer circumference of the sheet member 2. Also, there may be a gap between the outermost edge of each cell group 1 and the edge seal 3. In addition, instead of dividing multiple cell groups 1 into left and right groups and drawing out one pair of electrode pairs E1, E2 from each group for a total of two pairs, it is also possible to connect the groups inside the solar cell modules 101, 102 and draw out one pair of electrode pairs E1, E2 together. Alternatively, instead of directly drawing out the electrode pairs E1 and E2 from the sheet member 2, they may be connected internally to a junction box or the like and drawn out as a cable. [Explanation of Symbols]

[0035] 1...Cell group, 2...Sheet member, 3...Edge seal (edge ​​seal member), 10...Solar cell, 11,13...Electrode, 12...Power generation element layer, 20A~20D,21A~21J,22A~22J...Divided section, 100,101,102...Solar cell module, 100,101 solar cell module, 111...Conductive substrate, 112...Lower electrode layer, 121...p-type hole transport layer, 122...Light absorption layer, 123...n-type electron transport layer, 131...Upper electrode layer, 132...Grid electrode, DK2,DK3,DS2,DS3...Maximum spacing, E...Current collector electrode, E1,E2...Electrode pair, Jx,Jy...Axis, K0,K1,K2,K3...Notch, W2,W3...Spacing, WA,WB...Width, θ2,θ3...Apex angle

Claims

1. Sheet material and A plurality of cells are arranged planarly on or within the sheet member, and a plurality of solar cells are connected to each other. A current collector electrode connected to the aforementioned group of cells, Equipped with, The sheet member is formed around the plurality of cell groups and has a plurality of open notches on the outer periphery of the sheet member. The aforementioned multiple notches are provided to separate the current collector electrodes connected to the outer periphery of adjacent cell groups. The multiple adjacent cell groups and the multiple notches are such that the maximum distance between them on the outer periphery of the sheet member is greater than the maximum distance between them on the central side of the sheet member. The distance between current-collecting electrodes connected to a group of solar cells arranged opposite each other with the central portion of the multiple solar cells in the direction of connection is smaller on the outer periphery side than on the central side in the direction intersecting the connection direction. Solar cell module.

2. The plurality of cell groups are arranged side by side along a direction intersecting the connecting direction, The plurality of notches are provided between predetermined cell groups among the plurality of cell groups, The solar cell module according to claim 1.

3. The plurality of notches are arranged at predetermined intervals along the direction in which the plurality of cell groups are placed side by side. A solar cell module according to claim 1 or 2.

4. The current collecting electrode extends along the direction in which the plurality of cell groups are arranged side by side. A solar cell module according to claim 1 or 2.

5. The width of the notch is greater on the outer periphery side of the sheet member than on the central side of the sheet member. A solar cell module according to claim 1 or 2.

6. The plurality of cell groups and / or the plurality of notches extend radially from the central side to the outer peripheral side of the sheet member. A solar cell module according to claim 1 or 2.

7. The system includes an edge sealing member provided along the outer edge of the plurality of cell groups. A solar cell module according to claim 1 or 2.

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