Solar cell module

Abstract

To provide a solar cell module that can eliminate the need for an insulating sheet for insulation when installing a terminal box.SOLUTION: In a solar cell module 1 having a polygonal outer shape including a hypotenuse, and including strings S1, S2 each consisting of a plurality of solar cell cells C, C, ..., terminal boxes 61, 62, and wiring 51d, 52d, 51a connecting the strings S1, S2 and the terminal boxes 61, 62, the terminal boxes 61, 62 are arranged such that the positions of the terminal blocks 61a, 61b, 62a connected to the wiring 51d, 52d, 51a are closer to the hypotenuse portion 12, which is the outer edge that forms the hypotenuse, than the solar cell cells C, C, ..., and the wiring 51d, 52d, 51a is located between the solar cell cells C, C, ... and the hypotenuse portion 12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to solar cell modules. [Background technology]

[0002] As disclosed in Patent Document 1, in the prior art, a solar cell module includes a solar cell string in which a plurality of solar cells are electrically connected in series with inter-cell tabs, horizontal tabs that electrically connect the plurality of solar cell strings in series, and output tabs that extract output from the solar cell strings. A terminal box is disposed on the rear surface of the solar cell module, on the rear side of the solar cell, and the output tab is connected to the terminal box.

[0003] As mentioned above, since the terminal box is disposed on the back side of the solar cell, the output tab, which is the wiring connected to the terminal box, is also disposed on the back side of the solar cell. For this reason, an insulating sheet is interposed between the output tab and the solar cell, providing insulation between the output tab and the solar cell. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication WO2018 / 173216 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned conventional technology structure, an insulating sheet is required, and therefore when manufacturing a solar cell module, work is required to interpose the insulating sheet between the wiring connected to the terminal box and the solar cell, leaving room for improvement in order to increase the productivity of solar cell modules.

[0006] The present disclosure has been made in consideration of these points, and its purpose is to provide a solar cell module that does not require an insulating sheet for insulation when arranging a terminal box. [Means for solving the problem]

[0007] The solution of the present disclosure for achieving the above object is premised on a solar cell module having a polygonal outer shape including a hypotenuse, the solar cell module including a string of solar cells, a terminal box, and wiring connecting the string and the terminal box, the terminal box being disposed such that a terminal block connected to the wiring is positioned closer to the hypotenuse portion, which is the outer edge of the hypotenuse, than the solar cells, and the wiring is positioned between the solar cells and the hypotenuse portion.

[0008] In addition, the string may be configured by arranging multiple cell rows in parallel, each row having a different number of solar cells in the row direction, the wiring may extend along the outer edge of the solar cell located at the hypotenuse side end, and the terminal block may be located on an extension of the wiring.

[0009] In addition, the string may be configured by arranging multiple cell rows in parallel, each row having a different number of solar cells in the row direction, and the wiring may include a portion extending along the outer edge of the solar cell located at the hypotenuse side end and a portion extending toward the hypotenuse portion.

[0010] Furthermore, the string may be configured in such a manner that a number of cell rows, each having a different number of solar cells arranged in the column direction, are arranged side by side, and the edges of the solar cells located on one side of the column direction in each cell row are arranged in the same straight line, and the edges of the solar cells located on the other side of the column direction are arranged in a stepped manner.

[0011] In a solar cell module to which the present disclosure is applied, the terminal box may be disposed so that the entire terminal box is located closer to the oblique side portion than the solar cell. Effect of the Invention

[0012] According to the present invention, when manufacturing a solar cell module, it is possible to eliminate the need for the task of interposing an insulating sheet between the wiring connected to the terminal box and the solar cell, thereby improving the productivity of the solar cell module. [Brief description of the drawings]

[0013] [Figure 1] 1 is a plan view illustrating a solar cell module according to a first embodiment. [Diagram 2] FIG. 2 is a plan view for explaining the series connection direction of solar cells in each string in the solar cell module according to the first embodiment. [Diagram 3] FIG. 2 is a vertical cross-sectional view showing the internal structure of the solar cell module. [Figure 4] FIG. 4 is a plan view for illustrating a connection state between a first terminal box and an end electrode wiring in the first embodiment. [Diagram 5] FIG. 1 is a plan view illustrating a solar cell module according to a comparative example. [Figure 6] FIG. 11 is a plan view for explaining the series connection direction of solar cells in each string in a solar cell module according to a comparative example. [Figure 7] FIG. 2 is a view corresponding to FIG. 1 for explaining the overall length of electrode wiring and soldering locations in the solar cell module according to the first embodiment. [Figure 8] 5 for explaining the overall length and soldering locations of electrode wiring in a solar cell module according to a comparative example. FIG. [Figure 9] FIG. 11 is a plan view for illustrating a connection state between a first terminal box and an end electrode wiring in the second embodiment. [Figure 10]FIG. 13 is a plan view for illustrating a connection state between a first terminal box and an end electrode wiring in the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[0015] [First embodiment] -Outline of solar cell module configuration- FIG. 1 is a plan view showing a solar cell module 1 according to the first embodiment (more specifically, a state in which a frame 2 is attached to the outer edge of the solar cell module 1). In FIG. 1, the vertical direction of the figure is the X direction, the upper side is called the X1 direction, and the lower side is called the X2 direction. The horizontal direction of the figure is the Y direction, the left side of the figure is called the Y1 direction, and the right side is called the Y2 direction. The Y direction is a direction perpendicular to the X direction. In the following, the X direction may be called the column direction of the solar cell module 1 (the direction in which solar cell cells C, C, ... constituting a cell row are lined up), and the Y direction may be called the row direction of the solar cell module 1 (the direction in which a plurality of cell rows are arranged side by side).

[0016] The solar cell module 1 is a so-called corner module, and its outer shape is configured as a polygon (pentagon in this embodiment) including at least one oblique side. A frame 2 is attached to the outer edge of the solar cell module 1. The frame 2 has a lower end frame part 21, a right side frame part 22 extending upward (X1 direction) from the right end (end in the Y2 direction) of the lower end frame part 21, a left side frame part 23 extending upward (X1 direction) from the left end (end in the Y1 direction) of the lower end frame part 21, an upper end frame part 24 extending horizontally (Y1 direction) from the upper end (end in the X1 direction) of the right side frame part 22, and an oblique side frame part 25 extending between the left end (end in the Y1 direction) of the upper end frame part 24 and the upper end (end in the X1 direction) of the left side frame part 23. Therefore, the oblique side frame part 25 is attached to the oblique side part 12, which is the outer edge of the solar cell module 1 and serves as the oblique side.

[0017] The solar cell module 1 has at least one string consisting of a plurality of solar cell cells C connected in series. The solar cell module 1 according to this embodiment has a plurality of strings S1 to Sn, and these strings S1 to Sn are connected in parallel to each other. The solar cell module 1 according to this embodiment has n=2. That is, it has two strings S1 and S2, and these strings S1 and S2 are connected in parallel to each other.

[0018] The solar cell module 1 is configured such that a plurality of cell rows CR1 to CRm, each having a different number (cell number) of solar cell cells C, C, ... arranged in the column direction (X direction), are arranged in parallel in the row direction (Y direction). In the solar cell module 1 according to this embodiment, m=5. That is, five cell rows CR1, CR2, CR3, CR4, CR5 are arranged in parallel in the row direction (Y direction). In this embodiment, the cell row located on the leftmost side (Y1 direction side) in the figure is called the first cell row CR1, the cell row located second from the left is called the second cell row CR2, the cell row located third from the left is called the third cell row CR3, the cell row located fourth from the left is called the fourth cell row CR4, and the cell row located rightmost is called the fifth cell row CR5. In each of the cell rows CR1 to CR5, the solar cell cells C are connected in series. FIG. 2 is a plan view for explaining the series connection direction of the solar cell cells C, C, ... in each string S1, S2 in the solar cell module 1 according to this embodiment. In FIG. 2, the thick black arrows attached to the first cell row CR1, the second cell row CR2, and the fifth cell row CR5 respectively indicate the direction of current flow in the first string S1. The hollow arrows attached to the third cell row CR3 and the fourth cell row CR4 respectively indicate the direction of current flow in the second string S2. In each cell row, the solar cells C adjacent to each other in the X direction are connected in series by wires (wiring material 33 described later) arranged on the front or back surface of the solar cell C. A plurality of wires connecting the solar cells C are arranged on one solar cell C. The plurality of wires are arranged at approximately equal intervals in the Y direction on the front surface of the solar cell C, and are arranged to extend to the back surface of the adjacent solar cell C. The number of wires arranged on the front surface of the solar cell C is, for example, 2 to 16. The size of the wire is, for example, a diameter of 0.3 to 0.5 μm, and a length is about twice the length of the solar cell C in the X direction.

[0019] The solar cell C constituting each of the cell rows CR1 to CR5 is, for example, a solar cell (full cell) about 160 mm square divided into two. In other words, it is a half cell formed into a size of about 160 mm (dimension in the Y direction) × 80 mm (dimension in the X direction) square.

[0020] Wires (wiring material 33 described later) arranged on the front or back surface of the solar cell C at the X-direction end of each of the cell rows CR1 to CR5 are connected to a bus bar (intermediate electrode wiring or end electrode wiring described later). The bus bar is, for example, a flat conductor having a width of 3 to 8 mm. The bus bar extends along the outer edge of the cell row so as to be connected to a plurality of cell rows, and the plurality of cell rows are connected in series by the bus bar to form one string. As will be described in detail later, when a plurality of strings are formed in the solar cell module 1, the bus bar is connected to the cell rows such that the number of series of the solar cell C for each string is the same. The final bus bar (end electrode wiring described later) in the direction of series connection of the strings is inserted into a terminal box and is soldered to a terminal block portion (a + terminal block and a - terminal block described later). An output cable comes out of the terminal box, and the output cable is connected to the outside to make a connection for outputting the generated power from the solar cell module 1.

[0021] As shown in FIG. 1, in the solar cell module 1, the edge of each solar cell C located at the end in the X1 direction in the column direction (X direction) in each of the first cell row CR1 to the fifth cell row CR5 is stepped. Therefore, between the solar cell C located at the end in the X1 direction in the column direction (X direction) in each of the first cell row CR1 to the fourth cell row CR4 and the oblique side frame part 25 (oblique side part 12), a plate part 11 is formed, which is a region where no solar cell C exists. On the back side of the plate part 11 of the solar cell module 1, the above-mentioned final bus bar is inserted into a terminal box and soldered to the terminal block part. The oblique side part 12 is configured as an outer edge (outer edge of the solar cell module 1) extending in a direction inclined with respect to the cell row direction (X direction). The plate part 11 is configured by laminating a light-transmitting substrate, a sealing material, and a protective member that constitute the solar cell module 1. The light-transmitting substrate, the sealing material, and the protective member will be described later with reference to FIG. 3. Since the plate portion 11 is an area where no solar cells C exist, it is preferable to place a design sheet thereon so that the plate portion 11 appears to be the same color as the area where the solar cells exist.

[0022] - Internal structure of a solar cell module - Here, the internal structure of the solar cell module 1 will be described. Fig. 3 is a vertical cross-sectional view (vertical cross-sectional view of the periphery of the connection portion between the solar cell C, C) showing the internal structure of the solar cell module 1 (for example, a cross-sectional view taken along line III-III in Fig. 1). As shown in Fig. 3, the solar cell module 1 has a structure in which the solar cell C and the wiring material 33 are sealed between a light-transmitting substrate 34 and a protective member 35 by a light-transmitting sealing material 36. The light-transmitting substrate 34 is provided so as to face the front side (light-receiving surface side) of the solar cell C. The protective member 35 is provided so as to face the back side (opposite the light-receiving surface) of the solar cell C.

[0023] As shown in FIG. 3, the solar cell C includes a front electrode 31 and a back electrode 32. The front electrode 31 is composed of a bus bar electrode 31a and a finger electrode (not shown). The bus bar electrode 31a is strip-shaped and is formed linearly in the column direction (X direction) on the front surface of the solar cell C. A large number of finger electrodes are formed extending in a comb-teeth shape from both side edges of the bus bar electrode 31a in a row direction (Y direction) perpendicular to the column direction (X direction). The finger electrodes are patterned to cover the entire light receiving surface of the solar cell C at regular intervals. The back electrode 32 is formed linearly in a strip shape in the column direction (X direction) on the back surface of the solar cell C, and is provided to face the bus bar electrode 31a on both sides.

[0024] As shown in Fig. 3, the wiring material 33 is connected to the front electrode 31 and the back electrode 32. The wiring material 33 is connected to the bus bar electrode 31a of the front electrode 31 of a solar cell C and the back electrode 32 of another solar cell C adjacent to the solar cell C, and connects adjacent solar cells C, C in series, and is sometimes called an interconnector. The external shape of the wiring material 33 is a wire or ribbon shape. The wiring material 33 is configured by coating the outer surface of a base material having a circular or elongated rectangular cross section with solder (solder plating process). The material of the base material is not particularly limited, but a metal such as copper can be used.

[0025] Moreover, one side (left side in FIG. 3) of the wiring member 33 is solder-connected to the bus bar electrode 31a on the front surface of the solar cell C. The other side (right side in FIG. 3) of the wiring member 33 is solder-connected to the back surface electrode 32 on the back surface of the adjacent solar cell C. In this embodiment, as shown in FIG. 1 (reference numbers for the front surface electrode 31 and the wiring member 33 are omitted in FIG. 1), ten bus bar electrodes 31a and ten wiring members 33 are formed in each of the solar cell C, C, ..., but the present invention is not limited to this.

[0026] -Composition of each cell row- The cell rows CR1 to CR5 are different from each other in the number of solar cells C arranged in the row direction. Specifically, the first cell row CR1 is configured by 2 solar cells C, C arranged in the row direction (X direction). The second cell row CR2 is configured by 4 solar cells C, C, ... arranged in the row direction. The third cell row CR3 is configured by 7 solar cells C, C, ... arranged in the row direction. The fourth cell row CR4 is configured by 9 solar cells C, C, ... arranged in the row direction. The fifth cell row CR5 is configured by 10 solar cells C, C, ... arranged in the row direction. In this embodiment, the number of solar cells C arranged in all the cell rows CR1 to CR5 is different from each other, but the cell rows having the same number of solar cells C may include cell rows, or the cell rows having different numbers of solar cells C may include cell rows.

[0027] The number of solar cells C, C, ... in each cell row CR1 to CR5 is set according to the outer shape of the solar cell module 1. In this embodiment, the outer shape of the solar cell module 1 has a diagonal side in the Y1 direction, and the X-direction length decreases from the Y2 direction to the Y1 direction, so the number of solar cells C arranged in each cell row is reduced from the Y2 direction to the Y1 direction. When the solar cells C are arranged in this manner, the solar cells C are rectangular, so that the edge of the cell row on the diagonal side becomes stepped. Here, in order to increase the output of the solar cell module 1, it is desirable to set the number of solar cells C arranged to the maximum number. That is, the edge of each of the solar cells C, C, ... located on one side (X2 direction side) in the row direction (X direction) in each of the first cell row CR1 to the fifth cell row CR5 is arranged on approximately the same straight line so as to be close to the lower end frame part 21 and to be along the lower end frame part 21. In addition, the edge of each of the solar cells C, C, ... located on the other side (X1 direction side) of the column direction (X direction) in each of the first cell row CR1 to the fifth cell row CR5 is stepped due to the difference in the number of cells in each of the cell rows CR1 to CR5. The number of solar cells C, C, ... in each of the first cell row CR1 to the fourth cell row CR4 is the number of solar cells C located at the end in the X1 direction arranged until they approach the oblique side frame portion 25 (the number of solar cells C, C, ... arranged until the distance from the oblique side frame portion 25 becomes smaller than the X direction dimension of the solar cell C). In addition, the number of solar cells C, C, ... in the fifth cell row CR5 is the number of solar cells C located at the end in the X1 direction arranged until they approach the upper end frame portion 24 (the number of solar cells C, C, ... arranged until the distance from the upper end frame portion 24 becomes smaller than the X direction dimension of the solar cell C). This results in a configuration in which the maximum number of solar cells C, C, ... are packed together.

[0028] - Composition of each string - The solar cell module 1 according to this embodiment has a plurality of strings S1 to Sn each of which is made up of a plurality of solar cell cells C connected in series, and these strings S1 to Sn are connected in parallel to each other. The solar cell module 1 according to this embodiment has n=2. That is, the solar cell module 1 has two strings S1 and S2 each of which is connected in parallel to each other.

[0029] The connection structure of each of the cell rows CR1 to CR5 for constituting each of the strings S1 and S2 will be described below. In each of the cell rows CR1 to CR5, the solar cells C included in each cell row are connected in series. The cell rows CR1, CR2, and CR5 constituting the string S1 are connected in series by intermediate electrode wirings 41 and 42. The cell rows CR3 and CR4 constituting the string S2 are connected in series by intermediate electrode wiring 43. In addition, the strings S1 and S2 are connected in parallel by end electrode wirings 51 and 52. A specific description will be given below.

[0030] The solar cell module 1 according to the present embodiment includes a first string S1 and a second string S2. The first string S1 is configured by connecting a first cell row CR1, a second cell row CR2, and a fifth cell row CR5 in series with intermediate electrode wirings (a jump intermediate electrode wiring and an adjacent intermediate electrode wiring described later) 41, 42. In FIG. 1, the reference numeral (S1) attached to each cell row CR1, CR2, CR5 indicates that these cell rows CR1, CR2, CR5 constitute the first string S1. The second string S2 is configured by connecting a third cell row CR3 and a fourth cell row CR4 in series with intermediate electrode wirings (an adjacent intermediate electrode wiring described later) 43. In FIG. 1, the reference numeral (S2) attached to each cell row CR3, CR4 indicates that these cell rows CR3, CR4 constitute the second string S2. In this manner, the third cell row CR3 and the fourth cell row CR4 constituting the second string S2 are disposed between the second cell row CR2 and the fifth cell row CR5 constituting the first string S1. Fig. 2 is a plan view for explaining the series connection direction of the solar cell cells C, C, ... in each string S1, S2 in the solar cell module 1 according to this embodiment. In Fig. 2, the thick black arrows attached to the first cell row CR1, the second cell row CR2, and the fifth cell row CR5 respectively indicate the direction of current flow in the first string S1. Moreover, the hollow arrows attached to the third cell row CR3 and the fourth cell row CR4 respectively indicate the direction of current flow in the second string S2.

[0031] As described above, the number of solar cells C, C, ... in the first cell row CR1 to the fifth cell row CR5 is 2, 4, 7, 9, and 10, respectively. Therefore, the number of solar cells C, C, ... in the first string S1 formed by the first cell row CR1, the second cell row CR2, and the fifth cell row CR5 is 16, and the number of solar cells C, C, ... in the second string S2 formed by the third cell row CR3 and the fourth cell row CR4 is also 16. In other words, the number of solar cells C, C, ... in the first string S1 is the same as the number of solar cells C, C, ... in the second string S2.

[0032] As described above, the third cell column CR3 and the fourth cell column CR4 constituting the second string S2 are arranged between the second cell column CR2 and the fifth cell column CR5 constituting the first string S1, so that the cell columns constituting the first string S1 are not adjacent to each other. For this reason, in this embodiment, the jump intermediate electrode wiring 41 is provided as the intermediate electrode wiring that connects the cell columns constituting the same string that are not adjacent to each other in the row direction (in this embodiment, the first cell column CR1 and the fifth cell column CR5). In addition, the adjacent intermediate electrode wirings 42, 43 are provided as the intermediate electrode wiring that connects the cell columns constituting the same string that are adjacent to each other in the row direction (in this embodiment, the first cell column CR1 and the second cell column CR2, the third cell column CR3 and the fourth cell column CR4). The connection structure between the cell columns by the intermediate electrode wirings 41 to 43 will be specifically described below.

[0033] As a connection structure of each of the cell columns CR1, CR2, and CR5 constituting the first string S1, the negative electrode side (the side marked with - in FIG. 2) of the fifth cell column CR5 and the positive electrode side (the side marked with + in FIG. 2) of the first cell column CR1 are connected by a jump intermediate electrode wiring 41. This jump intermediate electrode wiring 41 includes a first wiring 41a connected to the negative electrode side of the fifth cell column CR5, extending in the Y direction and reaching the vicinity of the end of the first cell column CR1 on the Y1 direction side, a second wiring 41b extending in the X1 direction from the end of the first wiring 41a on the Y1 direction side and reaching the vicinity of the end of the first cell column CR1 on the X1 direction side, and a third wiring 41c extending in the Y2 direction from the end of the second wiring 41b on the X1 direction side and reaching the vicinity of the end of the first cell column CR1 on the Y2 direction side and connected to the positive electrode side of the first cell column CR1. Specifically, the wiring material 33 connected to the negative electrode of the solar cell C at the negative end of the fifth cell row CR5 in the series connection direction is connected to the first wiring 41a, and the wiring material 33 connected to the positive electrode of the solar cell C at the positive end of the first cell row CR1 in the series connection direction is connected to the third wiring 41c.

[0034] Furthermore, the negative electrode side of the first cell row CR1 and the positive electrode side of the second cell row CR2 are connected by an adjacent intermediate electrode wiring 42. Specifically, the wiring member 33 connected to the negative electrode of the solar cell C at the negative end of the first cell row CR1 in the series connection direction, and the wiring member 33 connected to the positive electrode of the solar cell C at the positive end of the second cell row CR2 in the series connection direction are each connected to the adjacent intermediate electrode wiring 42. This adjacent intermediate electrode wiring 42 is composed of wiring that extends along the Y direction from the vicinity of the end of the first cell row CR1 on the Y1 direction side to the vicinity of the end of the second cell row CR2 on the Y2 direction side.

[0035] As a connection structure of each of the cell rows CR3 and CR4 constituting the second string S2, the negative electrode side of the fourth cell row CR4 and the positive electrode side of the third cell row CR3 are connected by an adjacent intermediate electrode wiring 43. Specifically, the wiring member 33 connected to the negative electrode of the solar cell C at the negative end of the fourth cell row CR4 in the series connection direction and the wiring member 33 connected to the positive electrode of the solar cell C at the positive end of the third cell row CR3 in the series connection direction are each connected to the adjacent intermediate electrode wiring 43. This adjacent intermediate electrode wiring 43 is composed of a wiring extending along the Y direction from the vicinity of the end of the third cell row CR3 on the Y1 direction side to the vicinity of the end of the fourth cell row CR4 on the Y2 direction side.

[0036] The negative and positive ends of each string are connected to end electrode wirings 51, 52, respectively. The first end electrode wiring 51 connects the negative sides of each string S1, S2 to two terminal boxes 61, 62. The second end electrode wiring 52 connects the positive sides of each string S1, S2 to the terminal box 61.

[0037] The first terminal box 61 is provided with a positive electrode side take-out cable. FIG. 4 is a plan view for explaining the connection state between the first terminal box 61 and the end electrode wirings 51, 52. As shown in FIG. 4, a + terminal block 61a and a - terminal block 61b are provided inside the first terminal box 61. The end electrode wiring 52 (fourth wiring 52d described later) is soldered through a hole in the + terminal block 61a, and the end electrode wiring 51 (fourth wiring 51d described later) is soldered through a hole in the - terminal block 61b. The + terminal block 61a is also connected to the take-out cable. The first terminal box 61 is provided with a bypass diode 61c between the + terminal block 61a and the - terminal block 61b. As shown in FIG. 1 and FIG. 2, the first terminal box 61 is disposed at a position adjacent to the Y1 direction end of the fourth cell row CR4. It can also be said that the first terminal box 61 is disposed between the X1 direction end of the third cell row CR3 and the oblique side portion 12, or between the Y1 direction end of the fourth cell row CR4 and the oblique side portion 12. The first terminal box 61 is attached to the rear surface side of the plate portion 11 so that its longitudinal direction is in the X direction.

[0038] The second terminal box 62 is provided with a negative side take-out cable. At least a - terminal block 62a is provided inside the second terminal box 62. The second terminal box 62 is provided with a + terminal block and a - terminal block, similar to the first terminal box 61, and may be provided with a bypass diode between the + terminal block and the - terminal block. In this embodiment, the + terminal block is not used, but in a configuration in which three strings S1, S2, and S3 are provided and these strings S1, S2, and S3 are connected in parallel with each other, that is, in a case where two bypass diodes need to be used, the + terminal block and the bypass diode can be used. The end electrode wiring 51 (first wiring 51a described later) is soldered to the - terminal block 62a through a hole. The - terminal block 62a is also connected to the take-out cable. As shown in FIG. 1 and FIG. 2, the second terminal box 62 is disposed at a position adjacent to the end of the second cell row CR2 in the X1 direction. It can also be said that the second terminal box 62 is disposed between the X1 direction end of the second cell row CR2 and the oblique side portion 12, or between the Y1 direction end of the second cell row CR2 and the oblique side portion 12. The second terminal box 62 is attached to the rear surface side of the plate portion 11 so that its longitudinal direction is in the Y direction.

[0039] As shown in Figures 1 and 2, the first end electrode wiring 51 includes a first wiring 51a connected to the negative side of the second cell row CR2 and the - terminal block 62a of the second terminal box 62 and extending along the Y direction to the vicinity of the Y2 direction end of the second cell row CR2, a second wiring 51b extending along the X direction from the Y2 direction end of the first wiring 51a to the vicinity of the X1 direction end of the third cell row CR3, a third wiring 51c extending along the Y direction from the X1 direction end of the second wiring 51b to the vicinity of the Y2 direction end of the third cell row CR3 and connected to the negative side of the third cell row CR3, and a fourth wiring 51d extending in the X1 direction from the Y2 direction end of the third wiring 51c and connected to the - terminal block 61b of the first terminal box 61. Specifically, the wiring member 33 connected to the negative electrode of the solar cell C at the negative end in the series connection direction of the second cell row CR2, which is the negative end of the string S1, is connected to the first wiring 51a, and the wiring member 33 connected to the negative electrode of the solar cell C at the negative end in the series connection direction of the third cell row CR3, which is the negative end of the string S2, is connected to the third wiring 51c. In this way, the first end electrode wiring 51 is arranged so as to follow the shape of the upper side (X1 direction side) in the column direction (X direction) of each of the second cell row CR2 and the third cell row CR3, which are stepped. In other words, the first end electrode wiring 51 extends along the outer edge of the solar cell C, C, ... located at the oblique side end. The first end electrode wiring 51 is also arranged in the plate portion 11, which is an area where no solar cell C exists. In particular, the first wiring 51a connected to the second terminal box 62 and the fourth wiring 51d connected to the first terminal box 61 are disposed on the plate portion 11 and do not overlap with the solar cell C.

[0040] As shown in Figures 1 and 2, the second end electrode wiring 52 includes a first wiring 52a connected to the positive electrode side of the fifth cell column CR5 and extending along the Y direction to the vicinity of the Y1 direction end of the fifth cell column CR5, a second wiring 52b extending along the X direction from the Y1 direction end of the first wiring 52a to the vicinity of the X1 direction end of the fourth cell column CR4, a third wiring 52c extending along the Y direction from the X2 direction end of the second wiring 52b to the vicinity of the Y1 direction end of the fourth cell column CR4 and connected to the positive electrode side of the fourth cell column CR4, and a fourth wiring 52d extending in the X2 direction from the Y1 direction end of the third wiring 52c and connected to the + terminal block 61a of the first terminal box 61. Specifically, the wiring member 33 connected to the positive electrode of the solar cell C at the positive end in the series connection direction of the fifth cell row CR5, which is the positive end of the string S1, is connected to the first wiring 52a, and the wiring member 33 connected to the positive electrode of the solar cell C at the positive end in the series connection direction of the fourth cell row CR4, which is the positive end of the string S2, is connected to the third wiring 52c. In this way, the second end electrode wiring 52 is also arranged so as to follow the shape of the upper side (X1 direction side) in the column direction (X direction) of each of the fourth cell row CR4 and the fifth cell row CR5, which are stepped. In other words, the second end electrode wiring 52 also extends along the outer edge of the solar cell C, C, ... located at the oblique side end. In addition, the second end electrode wiring 52 is arranged in the plate portion 11, which is an area where the solar cell C does not exist. In particular, the fourth wiring 52d connected to the first terminal box 61 is arranged in the plate portion 11 and does not overlap with the solar cell C.

[0041] In Figure 4, the fourth wiring 52d connected to the + terminal block 61a of the first terminal box 61, the fourth wiring 51d connected to the - terminal block 61b of the first terminal box 61, and the solar cells C, C of the fourth cell row CR4 are shown with virtual lines.

[0042] As shown in FIG. 4, the connection position of the fourth wiring 52d to the + terminal block 61a of the first terminal box 61 and the connection position of the fourth wiring 51d to the - terminal block 61b of the first terminal box 61 are each positioned away from the solar cell C (positions that are off in the Y1 direction in FIG. 1). Here, in FIG. 4, the region on the left side of the solar cell C is a position between the oblique side portion 12 and the solar cell C at the Y1 direction end, and is the plate portion 11. That is, the first terminal box 61 is disposed such that the positions of the terminal blocks 61a, 61b are closer to the oblique side portion 12 (leftward in FIG. 4) than the solar cell C, and the positions of the terminal blocks 61a, 61b are between the oblique side portion 12 and the solar cell C and do not overlap with the solar cell C (see FIG. 1). Also, each of the fourth wirings 51d, 52d is positioned away from the solar cell C (positions that are off in the Y1 direction in FIG. 1). That is, the positions of the fourth wirings 51d, 52d are also closer to the oblique side portion 12 (closer to the Y1 direction in FIG. 1) than the solar cell C, and are between the oblique side portion 12 and the solar cell C. In other words, the terminal blocks 61a, 61b of the first terminal box 61 and the fourth wirings 51d, 52d are located on the plate portion 11.

[0043] According to this configuration, there is no possibility of contact between the wiring (fourth wiring 51d, 52d) connected to the first terminal box 61 and the solar cell C, and therefore there is no need to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, it is possible to eliminate the need for an operation of interposing an insulating sheet between the wiring connected to the terminal box and the solar cell C.

[0044] Similarly, in the second terminal box 62, the connection position of the first wiring 51a to the negative terminal block 62a of the second terminal box 62 is a position deviated from the solar cell C (a position deviated in the X1 direction in FIG. 1). That is, the second terminal box 62 is disposed such that the position of the negative terminal block 62a is closer to the oblique side portion 12 (closer to the X1 direction in FIG. 1) than the solar cell C, and the position of the negative terminal block 62a is between the oblique side portion 12 and the solar cell C and does not overlap with the solar cell C. Also, the first wiring 51a is a position deviated from the solar cell C (a position deviated in the X1 direction in FIG. 1). That is, the position of the first wiring 51a is also closer to the oblique side portion 12 than the solar cell C, and is between the oblique side portion 12 and the solar cell C. In other words, the negative terminal block 62a and the first wiring 51a of the second terminal box 62 are located on the plate portion 11.

[0045] This configuration also eliminates the possibility of contact between the wiring (first wiring 51a) connected to the second terminal box 62 and the solar cell C, making it unnecessary to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, it is possible to eliminate the need to interpose an insulating sheet between the wiring connected to the terminal box and the solar cell C.

[0046] -Effects of the embodiment- As described above, in the solar cell module 1 according to this embodiment, the terminal boxes 61 and 62 are disposed such that the terminal blocks 61a, 61b, and 62a are positioned closer to the oblique side portion 12 than the solar cell C, and the wirings 51d, 52d, and 51a connected to the terminal blocks 61a, 61b, and 62a are positioned between the solar cell C and the oblique side portion 12. Therefore, the connection positions of the wirings 51d, 52d, and 51a in the terminal boxes 61 and 62 and the wirings 51d, 52d, and 51a are positioned outside the solar cell C (positions between the oblique side portion 12 and the solar cell C and positions that do not overlap with the solar cell C), so there is no possibility that the wirings connected to the terminal boxes 61 and 62 will come into contact with the solar cell C, and there is no need to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, it is possible to eliminate the need to interpose an insulating sheet between the wirings connected to the terminal boxes 61 and 62 and the solar cell C, and the productivity of the solar cell module 1 can be improved.

[0047] The fourth wiring 51d, 52d and the first wiring 51a are output wirings of the strings S1, S2, and are wirings that connect the strings S1, S2 to the terminal boxes 61, 62. The fourth wiring 51d, 52d and the first wiring 51a are connected to the terminal blocks 61a, 61b, 62a, thereby connecting the strings S1, S2 to the terminal boxes 61, 62. Therefore, in the solar cell module 1 according to this embodiment, it can be said that the terminal boxes 61, 62 are arranged so that the connection position with the strings is closer to the oblique side portion 12 than the solar cell C, and the wirings that connect the strings and the terminal boxes are located between the solar cell C and the oblique side portion 12.

[0048] Furthermore, in this embodiment, the terminal boxes 61, 62 are disposed at positions on the rear surface side of the solar cell module that minimize overlap with the solar cell C. This makes it possible to prevent stress due to the weight of the terminal boxes 61, 62 from acting on the solar cell C (the stress can be reduced compared to when the entire terminal box overlaps with the solar cell), and thus makes it possible to suppress adverse effects of this stress on the solar cell C.

[0049] In addition, in this embodiment, the wiring (third wiring 51c, 52c, first wiring 51a) connected to the serial connection direction end of the strings S1, S2 and the wiring (fourth wiring 51d, 52d, first wiring 51a) connected to each terminal box 61, 62 are integrally formed. In other words, by making the wiring (fourth wiring 51d, 52d, first wiring 51a) connected to each terminal box 61, 62 a part of the end electrode wiring (51, 52), it is possible to realize a configuration that does not require an insulating sheet to be interposed between the wiring (output wiring) connected to the terminal box 61, 62 and the solar cell C without adding new wiring. In addition, the terminal blocks 61a, 61b, 62a are located on the extension line of the wiring (fourth wiring 51d, 52d, first wiring 51a) connected to each terminal box 61, 62, and therefore it is possible to connect to the terminal box 61, 62 without adding new wiring.

[0050] Generally, in a solar cell module having a polygonal outer shape including a hypotenuse, the edge of each solar cell C, C, ... on the hypotenuse side is stepped, and the plate portion 11, which is an area where no solar cell C exists, is present between the edge of the solar cell C, C, ... and the hypotenuse portion 12 (hypotenuse frame portion 25). This plate portion 11 corresponds to a position closer to the hypotenuse portion 12 than the solar cell C described above or a position between the solar cell C and the hypotenuse portion 12. Then, by arranging the terminals (terminal blocks 61a, 61b, 62a) of the terminal boxes 61, 62 on this plate portion 11 and positioning the wiring (fourth wiring 51d, 52d, first wiring 51a) connected to the terminal boxes 61, 62 on this plate portion 11, a configuration can be realized in which it is not necessary to interpose an insulating sheet between the wiring connected to the terminal boxes 61, 62 and the solar cell C. That is, by effectively utilizing this plate portion 11 (a portion where no solar cell C exists), it is possible to ensure the installation positions of the terminal boxes 61, 62 and the installation positions of the end electrode wirings 51, 52. In addition, since a relatively large area is ensured for this plate portion 11, it is possible to obtain a large degree of freedom in the arrangement of the terminal boxes 61, 62 (freedom of the installation positions and installation orientation).

[0051] [Comparison between the first embodiment and the comparative example] Next, a comparison will be described between the solar cell module 1 according to the first embodiment and a comparative example in which the terminal box is disposed on the rear surface of the solar cell module, on the rear surface side of the solar cell.

[0052] FIG. 5 is a plan view that shows a schematic diagram of a solar cell module a according to a comparative example. FIG. 6 is a plan view for explaining the serial connection direction of solar cells in each string in the solar cell module a according to this comparative example (in FIG. 6, the thick black arrows attached to the first cell row cr1, the second cell row cr2, and the fifth cell row cr5 respectively indicate the direction of current flow in the first string s1. Also, the hollow arrows attached to the third cell row cr3 and the fourth cell row cr4 respectively indicate the direction of current flow in the second string s2). In the comparative example shown in FIG. 5, each terminal box b, c is disposed at the end of the solar cell module a on the X2 direction side, below the solar cell. Also, in this comparative example, similarly to the first embodiment, the third cell row cr3 and the fourth cell row cr4 that constitute the second string s2 are disposed between the second cell row cr2 and the fifth cell row cr5 that constitute the first string s1.

[0053] As shown in Fig. 5, in the comparative example, the cell rows cr1, cr2, cr5, (cr3, cr4) constituting the same string s1 (s2) are connected to each other by intermediate electrode wirings d, e, f. Also, the strings s1, s2 are connected in parallel to each other by end electrode wirings g, h. This will be explained in detail below.

[0054] As a connection structure of each of the cell strings cr1, cr2, and cr5 constituting the first string s1, the negative electrode side of the first cell string cr1 and the positive electrode side of the second cell string cr2 are connected by adjacent intermediate electrode wiring d.

[0055] Moreover, the negative electrode side of the second cell row cr2 and the positive electrode side of the fifth cell row cr5 are connected by a jump intermediate electrode wiring e.

[0056] As a connection structure of each of the cell strings cr3, cr4 constituting the second string s2, the negative electrode side of the third cell string cr3 and the positive electrode side of the fourth cell string cr4 are connected by an adjacent intermediate electrode wiring f.

[0057] The end electrode wirings g, h include first end electrode wiring g that connects the negative pole side of each of the strings s1, s2 to two terminal boxes b, c, and second end electrode wiring h that connects the positive pole side of each of the strings s1, s2 to one terminal box b. The terminal boxes b, c are disposed on the rear surface side of the solar cell module a at positions spaced a predetermined distance in the X1 direction from the lower end frame part i of the frame.

[0058] The first end electrode wiring g is connected to the negative electrode side of the fifth cell row cr5 and the negative terminal of the second terminal box (right terminal box) c, and is also connected to the negative terminal of the first terminal box (left terminal box) b. The first end electrode wiring g and the negative terminal of the first terminal box b, and the first end electrode wiring g and the negative terminal of the second terminal box c are connected by conductors extending along the X direction.

[0059] The second end electrode wiring h is connected to the positive electrode side of the first cell row cr1 and the + terminal of the first terminal box b. In addition, the second end electrode wiring h and the + terminal of the first terminal box b are connected by a conductor extending along the X direction.

[0060] The conductor wires extending along the X direction are the wirings connected to the terminal boxes. Since the wirings are arranged on the rear side of the solar cells, it is necessary to insulate the wirings from the solar cells, and an insulating sheet (not shown) is arranged between the wirings and the solar cells. Therefore, when manufacturing the solar cell module a, it is necessary to perform an operation to interpose an insulating sheet between the wirings connected to the terminal boxes b and c and the solar cells.

[0061] The lengths of the electrode wirings 41-43, 51, 52, d-h and the number of soldering points connecting the electrode wirings 41-43, 51, 52, d-h will be described below for the solar cell module 1 according to the first embodiment and the solar cell module a according to the comparative example.

[0062] Fig. 7 is a diagram equivalent to Fig. 1 for explaining the total length and soldering locations of the electrode wirings 41-43, 51, 52 in the solar cell module 1 according to the first embodiment. Fig. 8 is a diagram equivalent to Fig. 5 for explaining the total length and soldering locations of the electrode wirings d-h in the solar cell module a according to the comparative example. In these diagrams, the length of each part (straight line portion) of the electrode wirings 41-43, 51, 52, d-h when the length of the half cell in the X direction is "1" is shown in the form of a balloon. Also, the soldering locations connecting the electrode wirings 41-43, 51, 52, d-h are shown by dashed circle.

[0063] 7, in the solar cell module 1 according to the first embodiment, the total length of each of the electrode wirings 41-43, 51, 52 is "36" when the length of the half cell in the X direction is "1". Also, the number of soldering points is "8".

[0064] On the other hand, as shown in Fig. 8, in the solar cell module a according to the comparative example, the total length of each electrode wiring d-h is "38" when the length of the half cell in the X direction is "1", and the length of the conductor is also necessary. Also, the number of soldering points is "10".

[0065] As described above, in the first embodiment, the overall length of the electrode wiring can be shortened and the number of soldering points can be reduced compared to the comparative example. Therefore, by arranging the wiring connected to the terminal box and the connection position between the terminal box and the wiring in the area (plate portion 11) on the oblique side where no solar cell exists, it is also possible to shorten the overall length of the electrode wiring and reduce the number of soldering points.

[0066] [Second embodiment] Next, a second embodiment will be described. In this embodiment, the position of the first terminal box 61 is different from that of the first embodiment described above, and accordingly, the positions of the end electrode wirings 51, 52 are also different. Since the other configurations are the same as those of the first embodiment described above, the differences from the first embodiment will be mainly described here.

[0067] Fig. 9 is a plan view for explaining the connection state between the first terminal box 61 and the end electrode wirings 51, 52 in this embodiment. In Fig. 9, the same members as those shown in Fig. 4 are given the same reference numerals. In Fig. 9, the fourth wiring 52d connected to the + terminal block 61a of the first terminal box 61, the fourth wiring 51d connected to the - terminal block 61b of the first terminal box 61, and the solar cells C, C of the fourth cell row CR4 are shown by virtual lines. In Fig. 9, the left side (Y1 direction side) of the solar cells C, C is the region between the oblique side portion 12 and the plate portion 11.

[0068] 9, the first terminal box 61 is entirely positioned away from the solar cell C. Therefore, the positions of the terminal blocks 61a, 61b are also positioned away from the solar cell C. Accordingly, the position of the fourth wiring 52d connected to the + terminal block 61a of the first terminal box 61 and the position of the fourth wiring 51d connected to the - terminal block 61b of the first terminal box 61 are set to positions farther away from the solar cell C (positions farther away from the solar cell C in the Y1 direction) than those in the first embodiment. Thus, even in this embodiment, the first terminal box 61 is disposed such that the positions of the terminal blocks 61a, 61b are closer to the oblique side portion 12 than the solar cell C, and the wirings (fourth wirings) 51d, 52d connected to the first terminal box 61 are positioned between the solar cell C and the oblique side portion 12. The positions of the fourth wirings 51d and 52d can be adjusted by changing the lengths of the third wirings 51c and 52c and the connection positions with the third wirings 51c and 52c.

[0069] This configuration also eliminates the possibility of contact between the wiring connecting the string and the terminal box, i.e., the wiring (fourth wiring 51d, 52d) connected to the first terminal box 61 and the solar cell C, making it unnecessary to interpose an insulating sheet between them. As a result, in manufacturing the solar cell module 1, the work of interposing an insulating sheet when disposing the first terminal box 61 can be eliminated.

[0070] In this embodiment, the first terminal box 61 is disposed at a position (plate portion 11) on the back surface side of the solar cell module 1 where the entire first terminal box 61 does not overlap with the solar cell C. This makes it possible to prevent stress due to the weight of the first terminal box 61 from acting on the solar cell C (the stress acting on the solar cell C can be reduced compared to the first embodiment), and thus makes it possible to suppress adverse effects of this stress on the solar cell C.

[0071] The above-mentioned arrangement of the terminal box and the wiring so that the entire terminal box does not overlap with the solar cell C can also be applied to the second terminal box 62 and the first wiring 51a connected to the second terminal box 62. For example, the position of the first wiring 51a connected to the negative terminal block 62a of the second terminal box 62 may be set at a position farther away from the solar cell C in the X1 direction than that of the first embodiment shown in Fig. 1, and the entire second terminal box 62 may be disposed on the X1 side of the cell row CR2. Also, the first wiring 51a connected to the negative terminal block 62a of the second terminal box 62 may be extended in the Y1 direction than that of the first embodiment shown in Fig. 1, and the entire second terminal box 62 may be disposed on the Y1 side of the cell row CR2.

[0072] Furthermore, in this embodiment, similar to the first embodiment, the terminal blocks 61a, 61b are located on the extension lines of the wiring (fourth wiring) 51d, 52d connected to the first terminal box 61, and therefore can be connected to the terminal box 61 without adding new wiring.

[0073] In addition, in this embodiment, the fourth wirings 51d, 52d extend parallel to the outer edge of the hypotenuse side of the solar cell C, but they do not have to be parallel. By extending the fourth wirings 51d, 52d in a direction away from the solar cell C, the first terminal box 61 may be positioned on the back side of the solar cell module 1 at a position (plate portion 11) that does not overlap with the solar cell C.

[0074] [Third embodiment] Next, a third embodiment will be described. In this embodiment, the position of the first terminal box 61 is the same as that of the second embodiment, but the shapes of the end electrode wirings 51, 52 are different from those of the second embodiment. Therefore, the differences from the second embodiment will be mainly described here.

[0075] Fig. 10 is a plan view for explaining the connection state between the first terminal box 61 and the end electrode wirings 51, 52 in this embodiment. In Fig. 10, the same members as those shown in Fig. 4 are given the same reference numerals. In Fig. 10, the fourth wiring 52d connected to the + terminal block 61a of the first terminal box 61, the fourth wiring 51d connected to the - terminal block 61b of the first terminal box 61, and the solar cells C, C of the fourth cell row CR4 are shown by virtual lines. In Fig. 10, the left side of the solar cells C, C is the region between the oblique side portions, which is the plate portion 11.

[0076] 10, the end electrode wirings 51, 52 in this embodiment include conductors 51e, 52e (portions extending toward the oblique side portions 12) extending from the fourth wirings 51d, 52d (portions extending along the outer edges of the solar cells C, C) toward the terminal blocks 61a, 61b. This makes it possible to position the entire first terminal box 61 away from the solar cells C, C while arranging the fourth wirings 51d, 52d in positions close to the solar cells C, C.

[0077] This configuration also eliminates the possibility of contact between the wiring connecting the string and the terminal box, i.e., the wiring connected to the first terminal box 61 (the fourth wiring 51d, 52d and the conductors 51e, 52e), and the solar cell C, and therefore eliminates the need to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, it is possible to eliminate the need for the work of interposing an insulating sheet when disposing the first terminal box 61.

[0078] Furthermore, in this embodiment, similarly to the second embodiment described above, the first terminal box 61 is disposed at a position (plate portion 11) on the rear surface side of the solar cell module 1 where the entire first terminal box 61 does not overlap with the solar cell C. This makes it possible to prevent stress due to the weight of the first terminal box 61 from acting on the solar cell C (the stress acting on the solar cell C can be reduced compared to the first embodiment), and thus makes it possible to suppress adverse effects of this stress on the solar cell C.

[0079] Furthermore, the arrangement position of the terminal box and wiring so that the entire terminal box does not overlap with the solar cell C can also be applied to the second terminal box 62 and the first wiring 51a connected to the second terminal box 62.

[0080] -Other embodiments- The present disclosure is not limited to the above-described embodiments, and can be implemented in various other forms. Therefore, the above-described embodiments are merely illustrative in all respects and should not be interpreted as being restrictive. The scope of the present disclosure is indicated by the claims, and is not restricted in any way by the text of the specification. Furthermore, all modifications and changes within the scope of the claims are within the scope of the present disclosure.

[0081] For example, in each of the above embodiments, a solar cell module 1 has been described in which a pair of cell rows CR3 and CR4 constituting one string (a first string in this embodiment) S1 among a plurality of strings S1 and S2 are arranged between the pair of cell rows CR2 and CR5 constituting the other string (a second string in this embodiment). The present disclosure is not limited to this, and can also be applied to a solar cell module in which a string is formed only by adjacent cell rows.

[0082] In addition, in each of the above embodiments, the number of solar cells C, C, ... in each of the strings S1, S2 is the same, but the number of cells may be slightly different (for example, by about 1 or 2). For example, the number of solar cells C, C, ... in each of the strings S1, S2 may be slightly different as long as the power loss caused by the difference in the number of solar cells C, C, ... in each of the strings S1, S2 falls within an allowable range and the strings S1, S2 have a function of preventing reverse current flow.

[0083] Furthermore, in each of the above embodiments, the solar cell module 1 including two strings S1 and S2 has been described as an example, but the present invention is also applicable to a solar cell module including three or more strings.

[0084] In addition, in each of the above embodiments, a standard size cell (full cell) divided in half is used as the solar cell C, but there is no limit to the number of divisions, and it may be, for example, a cell divided into 1 / 3 or a full cell. In addition, when dividing into, for example, 1 / 4, the full cell may be divided into rectangular shapes or may be divided into approximately square shapes.

[0085] In addition, in each of the above embodiments, the present disclosure has been described as being applied to a monocrystalline solar cell module in which electrodes are formed on both the light-receiving surface and the back surface opposite the light-receiving surface, but it may also be applied to a back electrode type solar cell module (so-called back contact type solar cell module) in which a p-type electrode and an n-type electrode are formed on the back surface opposite the light-receiving surface.

[0086] In each of the above embodiments, the solar cell module 1 is installed on the roof of a house, for example, with the direction along the slope of the roof being the X direction. In addition, the height dimension of the solar cell module 1 is small on the left side of the figure and large on the right side, but the height dimension of the solar cell module 1 may be large on the left side of the figure and small on the right side.

[0087] In addition, in each of the above-described embodiments, the solar cell module 1 according to this embodiment has a configuration in which the strings are connected in parallel to each other, but there may be only one string. When there is one string, all the cell rows included in the solar cell module 1 are connected in series. When there is one string, similarly to the strings S1 and S2 in each of the above-described embodiments, in each cell row, the solar cell cells C included in each cell row are connected in series, and each cell row is connected in series by intermediate electrode wiring. In addition, end electrode wiring is connected to the end of the string in the direction of series connection.

[0088] In addition, in each of the above-described embodiments, the solar cell module 1 according to this embodiment is configured to include a plurality of terminal boxes, but the number of terminal boxes may be one. [Industrial Applicability]

[0089] The present disclosure is applicable to corner modules of solar cells. [Explanation of symbols]

[0090] 1. Solar cell module 12 Hypotenuse 51a 1st wiring (wiring) 51d, 52d 4th wiring (wiring) 51e, 52e conductor 61 First terminal box 62 Second terminal box 61a + terminal block 61b, 62a - terminal block C. Solar cell CR1~CR5 1st~5th cell row S1, S2 strings

Claims

1. A solar cell module having a polygonal shape including a hypotenuse, the solar cell module comprising: a string made up of a plurality of solar cells; a terminal box; and wiring connecting the string and the terminal box, the solar cell module having a polygonal shape including a hypotenuse, the terminal box is disposed such that a terminal block connected to the wiring is located closer to a hypotenuse portion, which is an outer edge of the hypotenuse, than the solar cell; The solar cell module, wherein the wiring is located between the solar cell and the oblique side portion.

2. The solar cell module according to claim 1 , The string has a configuration in which a plurality of cell rows, each of which has a different number of the solar cells arranged in a row direction, are arranged in parallel, The wiring extends along an outer edge of the solar cell located at the end of the oblique side, and the terminal block is located on an extension of the wiring.

3. The solar cell module according to claim 1 , The string has a configuration in which a plurality of cell rows, each of which has a different number of the solar cells arranged in a row direction, are arranged in parallel, The solar cell module, characterized in that the wiring includes a portion extending along an outer edge of the solar cell located at the oblique side end, and a portion extending toward the oblique side.

4. The solar cell module according to claim 1 , The string has a configuration in which a plurality of cell rows, each of which has a different number of the solar cells arranged in a row direction, are arranged in parallel, A solar cell module characterized in that the edges of each of the solar cell rows located on one side in the column direction are arranged on the same straight line, and the edges of each of the solar cell rows located on the other side in the column direction are arranged in a stepped manner.

5. The solar cell module according to any one of claims 1 to 4, The solar cell module is characterized in that the terminal box is disposed so that the entire terminal box is positioned closer to the oblique side portion than the solar cell.

Images