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 a solar cell module.

Background Art

[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 by an inter-cell tab, a lateral tab that electrically connects a plurality of solar cell strings in series, and an output tab that extracts an output from the solar cell string. A terminal box is disposed on the back surface of the solar cell module on the back side of the solar cell, and the output tab is connected to the terminal box.

[0003] As described 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. Therefore, an insulating sheet is interposed between the output tab and the solar cell, and the output tab and the solar cell are insulated from each other.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the structure of the prior art described above, since an insulating sheet is required, when manufacturing a solar cell module, an operation for interposing an insulating sheet between the wiring connected to the terminal box and the solar cell is necessary, and there is room for improvement in order to improve the productivity of the solar cell module.

[0006] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a solar cell module that can eliminate the need for an insulating sheet for insulation when disposing a terminal box.

Means for Solving the Problems

[0007] The solution means of the present disclosure for achieving the above object includes a string composed of a plurality of solar cells, a terminal box, and wiring for connecting the string and the terminal box, and is premised on a solar cell module having a polygonal outer shape including a hypotenuse. And this solar cell module, including a configuration in which a plurality of cell rows in which the solar cell cells are arranged in the column direction are arranged in parallel, and the edges of the plurality of solar cell cells on the hypotenuse side are stepped, the wiring is located at the hypotenuse side end located between the solar cell and the hypotenuse including the part which is characterized by.

[0008] Also, the a plurality of the cell rows with different numbers of the solar cells arranged in the column direction are arranged side by side including , the wiring may extend along the outer edge of the solar cell located at the hypotenuse side end. including the part that does It may be.

[0009] Also, the a plurality of the cell rows with different numbers of the solar cells arranged in the column direction are arranged side by side including , 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] Also, the a plurality of the cell rows with different numbers of the solar cells arranged in the column direction are arranged side by side including , the end edges of the respective solar cells located on one side in the column direction in each cell row may be arranged on the same straight line. formed It may be.

[0011] Another solution means of the present disclosure for achieving the above object is premised on a solar cell module having a polygonal outer shape including a hypotenuse and including two strings composed of a plurality of solar cell cells. And, in this solar cell module, each of the strings is composed of a plurality of cell rows, a plurality of the solar cell cells included in the cell rows are connected in series, the plurality of cell rows constituting each string are connected in series, the two strings are connected in parallel by end electrode wirings, and the end electrode wirings are characterized by including a part located between the solar cell cell located at the hypotenuse side end and the hypotenuse part. Further, the wiring may include a part extending along the outer edge of the solar cell cell located at the hypotenuse side end.

Advantages of the Invention

[0012] According to the present invention, when manufacturing a solar cell module, it is possible to eliminate the operation of interposing an insulating sheet between the wiring connected to the terminal box and the solar cell, and improve the productivity of the solar cell module.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0014] Hereinafter, embodiments 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 descriptions thereof will not be repeated.

[0015] [First Embodiment] -Schematic Configuration of Solar Cell Module- FIG. 1 is a plan view schematically 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 defined as the X direction, the upper side is called the X1 direction, and the lower side is called the X2 direction. Also, the horizontal direction of the figure is defined as the Y direction, the left side in the figure is called the Y1 direction, and the right side is called the Y2 direction. The Y direction is perpendicular to the X direction. Also, hereinafter, the X direction may be referred to as the column direction of the solar cell module 1 (the direction in which the solar cells C, C,... constituting the cell column are arranged), and the Y direction may be referred to as the row direction of the solar cell module 1 (the direction in which a plurality of cell columns are arranged side by side).

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

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

[0018] The solar cell module 1 has a configuration in which a plurality of cell rows CR1 to CRm, in which the number of solar cells C, C, … arranged in the column direction (X direction) are different from each other, are arranged in parallel in the row direction (Y direction). In the solar cell module 1 according to the present embodiment, m = 5. That is, it has a configuration in which five cell rows CR1, CR2, CR3, CR4, and CR5 are arranged in parallel in the row direction (Y direction). In the present 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 on the rightmost side is called the fifth cell row CR5. In each of the cell rows CR1 to CR5, the solar cells C are connected in series. FIG. 2 is a plan view for explaining the series connection direction of the solar cells C, C, … in each of the strings S1 and S2 in the solar cell module 1 according to the present embodiment. In this FIG. 2, the thick black arrows attached to each of the first cell row CR1, the second cell row CR2, and the fifth cell row CR5 represent the current flow direction in the first string S1. Also, the white arrows attached to each of the third cell row CR3 and the fourth cell row CR4 represent the current flow direction 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 member 33 described later) arranged on the front surface or the back surface of the solar cell C. A plurality of wires for connecting the solar cells C to each other are arranged on one solar cell C. The plurality of wires are arranged at substantially equal distances in the Y direction on the front surface of the solar cell C and 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 the length is about twice the length of the solar cell C in the X direction.

[0019] The solar cells C that make up each cell column CR1 to CR5 are, for example, obtained by dividing a solar cell (full cell) with a size of about 160 mm square into two. That is, it is a half cell formed to have 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 ends of each cell column CR1 to CR5 are connected to bus bars (intermediate electrode wiring or end electrode wiring described later). The bus bar is, for example, a flat conductor with a width of 3 to 8 mm. The bus bar extends along the outer edge of the cell column so as to be connected to a plurality of cell columns, and a plurality of cell columns are connected in series by the bus bar to form one string. Although details will be described later, when a plurality of strings are formed in the solar cell module 1, the bus bar is connected to cell columns such that the number of solar cells C connected in series for each string is the same. The final bus bar (end electrode wiring described later) in the series connection direction of the string is inserted into the terminal box and is configured to be soldered to the terminal block portion (+ terminal block and - terminal block described later). A lead-out cable extends from the terminal box, and by connecting the lead-out cable to the outside, a connection for extracting the generated power from the solar cell module 1 is made.

[0021] As shown in Fig. 1, in the solar cell module 1, the edges of the solar cells C located at the X1-direction ends in the column direction (X direction) of each of the first cell columns CR1 to the fifth cell columns CR5 are stepped. For this reason, between the solar cells C located at the X1-direction ends in the column direction (X direction) of each of the first cell columns CR1 to the fourth cell columns CR4 and the hypotenuse frame portion 25 (hypotenuse portion 12), there is a plate portion 11 which is a region where no solar cell C exists. On the back side of the plate portion 11 of the solar cell module 1, the above-mentioned final bus bar is inserted into the terminal box and is solder-connected to the terminal block portion. The hypotenuse portion 12 is configured as an outer edge (the outer edge of the solar cell module 1) extending in a direction inclined with respect to the direction of the cell column (X direction). The plate portion 11 has a structure in which a light-transmissive substrate, a sealing material, and a protective member constituting the solar cell module 1 are laminated. These light-transmissive substrate, sealing material, and protective member will be described later with reference to Fig. 3. Note that since the plate portion 11 is a region where no solar cell C exists, it is preferable to dispose a design sheet so as to appear the same color as the region where the solar cell exists.

[0022] -Internal Structure of Solar Cell Module- Here, the internal structure of the solar cell module 1 will be described. Fig. 3 is a longitudinal sectional view showing the internal structure of the solar cell module 1 (a longitudinal sectional view around the connection portion between the solar cells C, C), for example, a sectional view along the line III-III in Fig. 1. As shown in this Fig. 3, the solar cell module 1 has a structure in which the solar cell C and the wiring material 33 are sealed between the light-transmissive substrate 34 and the protective member 35 by the light-transmissive sealing material 36. The light-transmissive 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 (the side opposite to the light-receiving surface) of the solar cell C.

[0023] Further, 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 finger electrodes (not shown). The bus bar electrode 31a is strip-shaped and linearly formed in the column direction (X direction) on the front surface of the solar cell C. The finger electrodes are formed in a comb shape and extend in the row direction (Y direction) orthogonal to the column direction (X direction) from both side edges of the bus bar electrode 31a, and a large number of them are formed. The finger electrodes are pattern-formed at regular intervals so as to cover the entire light-receiving surface of the solar cell C. Further, the back electrode 32 is formed in a strip shape linearly in the column direction (X direction) on the back surface of the solar cell C, and is provided so as to face the bus bar electrode 31a front and back.

[0024] Further, as shown in FIG. 3, a wiring member 33 is connected to the above-described front electrode 31 and back electrode 32. The wiring member 33 is a wiring member that is connected to the bus bar electrode 31a of the front electrode 31 of the solar cell C and the back electrode 32 of another solar cell C adjacent to the solar cell C, and connects the adjacent solar cells C and C in series, and is sometimes called an interconnector. The outer shape of the wiring member 33 is in the shape of a wire or a ribbon. The wiring member 33 has a configuration in which solder is coated (solder plating treatment) on the outer surface of a base material formed in a circular cross-section or an elongated strip shape. The material of the base material is not particularly limited, and for example, a metal such as copper can be used.

[0025] Also, one side (the 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 (the right side in FIG. 3) of the wiring member 33 is solder-connected to the back electrode 32 on the back surface of the adjacent solar cell C. In addition, in the present embodiment, as shown in FIG. 1 (in FIG. 1, the reference numerals for the front electrode 31 and the wiring member 33 are omitted), 10 bus bar electrodes 31a and wiring members 33 are formed in each of the solar cells C, C,..., but the present invention is not limited to this.

[0026] -Configuration of Each Cell Column- Each cell column CR1 to CR5 has a different number of solar cells C arranged in the column direction. Specifically, the first cell column CR1 is composed of two solar cells C arranged in the column direction (X direction). The second cell column CR2 is composed of four solar cells C arranged in the column direction. The third cell column CR3 is composed of seven solar cells C arranged in the column direction. The fourth cell column CR4 is composed of nine solar cells C arranged in the column direction. The fifth cell column CR5 is composed of ten solar cells C arranged in the column direction. In this embodiment, the number of solar cells C arranged in all cell columns CR1 to CR5 is different from each other. However, a cell column having the same number of solar cells C may be included, as long as there are cell columns having different numbers of solar cells C arranged from each other.

[0027] The number of photovoltaic cells C, C, … arranged in each cell column CR1 to CR5 is set according to the outer shape of the photovoltaic module 1. In the present embodiment, the outer shape of the photovoltaic module 1 has a hypotenuse in the Y1 direction, and the X-direction length decreases from the Y2 direction to the Y1 direction. Therefore, the number of photovoltaic cells C arranged for each cell column decreases from the Y2 direction to the Y1 direction. When the photovoltaic cells C are arranged in this way, since the photovoltaic cells C are rectangular, the edges of the cell columns on the hypotenuse side become stepped. Here, in order to increase the output of the photovoltaic module 1, it is desirable that the number of photovoltaic cells C arranged is set to the maximum number. That is, the edges of each photovoltaic cell C, C, … located on one side (X2 direction side) in the column direction (X direction) in each of the first cell column CR1 to the fifth cell column CR5 are arranged substantially in a straight line so as to be close to and along the lower end frame portion 21. Further, the edges of each photovoltaic cell C, C, … located on the other side (X1 direction side) in the column direction (X direction) in each of the first cell column CR1 to the fifth cell column CR5 are stepped due to the difference in the number of cells in each cell column CR1 to CR5. And the number of cells of the photovoltaic cells C, C, … in each of the first cell column CR1 to the fourth cell column CR4 is the number arranged until the photovoltaic cell C located at the X1 direction end approaches the hypotenuse frame portion 25 (the number of each photovoltaic cell C, C, … arranged until the distance from the hypotenuse frame portion 25 becomes smaller than the X-direction dimension of the photovoltaic cell C). Also, the number of cells of the photovoltaic cells C, C, … in the fifth cell column CR5 is the number arranged until the photovoltaic cell C located at the X1 direction side end approaches the upper end frame portion 24 (the number of each photovoltaic cell C, C, … arranged until the distance from the upper end frame portion 24 becomes smaller than the X-direction dimension of the photovoltaic cell C). As a result, a configuration is achieved in which the maximum number of photovoltaic cells C, C, … are laid out.

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

[0029] Hereinafter, the connection structure of each cell row CR1 to CR5 for constituting each of the strings S1 and S2 will be described. 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 the intermediate electrode wirings 41 and 42. The cell rows CR3 and CR4 constituting the string S2 are connected in series by the intermediate electrode wiring 43. Also, the strings S1 and S2 are connected in parallel by the end electrode wirings 51 and 52. Hereinafter, it will be specifically described.

[0030] The solar cell module 1 according to this embodiment includes a first string S1 and a second string S2. The first string S1 has a configuration in which a first cell row CR1, a second cell row CR2, and a fifth cell row CR5 are connected in series by intermediate electrode wirings (the jump-over intermediate electrode wiring and the adjacent intermediate electrode wiring described later) 41 and 42. In FIG. 1, the symbols (S1) attached to the respective cell rows CR1, CR2, and CR5 indicate that these cell rows CR1, CR2, and CR5 constitute the first string S1. Further, the second string S2 has a configuration in which a third cell row CR3 and a fourth cell row CR4 are connected in series by an intermediate electrode wiring (the adjacent intermediate electrode wiring described later) 43. In FIG. 1, the symbols (S2) attached to the respective cell rows CR3 and CR4 indicate that these cell rows CR3 and CR4 constitute the second string S2. Thus, the third cell row CR3 and the fourth cell row CR4 that constitute the second string S2 are arranged between the second cell row CR2 and the fifth cell row CR5 that constitute the first string S1. FIG. 2 is a plan view for explaining the series connection direction of the solar cells C, C,... in each of the strings S1 and S2 in the solar cell module 1 according to this embodiment. In this 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 represent the current flow direction in the first string S1. Also, the white arrows attached to the third cell row CR3 and the fourth cell row CR4 respectively represent the current flow direction in the second string S2.

[0031] As described above, the number of solar cells C, C,... in each of the first cell row CR1 to the fifth cell row CR5 is 2, 4, 7, 9, and 10. Therefore, the number of solar cells C, C,... in the first string S1 constituted 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 constituted by the third cell row CR3 and the fourth cell row CR4 is also 16. That is, 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, since the third cell row CR3 and the fourth cell row CR4 that form the second string S2 are arranged between the second cell row CR2 and the fifth cell row CR5 that form the first string S1, the cell rows that form the first string S1 are not adjacent to each other. For this reason, in the present embodiment, as the intermediate electrode wiring that connects cell rows that are cell rows forming the same string and that are not adjacent to each other in the row direction (in the case of the present embodiment, the first cell row CR1 and the fifth cell row CR5), a jump intermediate electrode wiring 41 is provided. Note that, as the intermediate electrode wiring that connects cell rows that are cell rows forming the same string and that are adjacent to each other in the row direction (in the case of the present embodiment, the first cell row CR1 and the second cell row CR2, and the third cell row CR3 and the fourth cell row CR4), adjacent intermediate electrode wirings 42 and 43 are provided. Hereinafter, the connection structure between cell rows by each of the intermediate electrode wirings 41 to 43 will be specifically described.

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

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

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

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

[0037] The first terminal box 61 is provided with a positive electrode side extraction cable. FIG. 4 is a plan view for explaining the connection state between the first terminal box 61 and the end electrode wirings 51 and 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 (the fourth wiring 52d described later) is soldered to the + terminal block 61a through a hole, and the end electrode wiring 51 (the fourth wiring 51d described later) is soldered to the - terminal block 61b through a hole. The + terminal block 61a is also connected to the extraction cable. The first terminal box 61 includes a bypass diode 61c between the + terminal block 61a and the - terminal block 61b. As shown in FIGS. 1 and 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 hypotenuse portion 12, or between the Y1 direction end of the fourth cell row CR4 and the hypotenuse portion 12. Further, the first terminal box 61 is attached to the back side of the plate portion 11 so that the longitudinal direction is the X direction.

[0038] The second terminal box 62 is provided with a negative-side extraction cable. Inside this second terminal box 62, at least a terminal block 62a is provided. Note that, similar to the first terminal box 61, the second terminal box 62 may be provided with a + terminal block and a - terminal block, and may be provided with a bypass diode between the + terminal block and the - terminal block. In the present embodiment, the + terminal block is not used, but for example, in a configuration including three strings S1, S2, and S3, where these strings S1, S2, and S3 are connected in parallel to each other, that is, when it is necessary to use two bypass diodes, the + terminal block and the bypass diode can be used. The end electrode wiring 51 (the first wiring 51a described later) is soldered to the - terminal block 62a through a hole. The - terminal block 62a is also connected to the extraction cable. As shown in FIGS. 1 and 2, the second terminal box 62 is disposed at a position adjacent to the X1-direction end of the second cell row CR2. 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 hypotenuse portion 12, or between the Y1-direction end of the second cell row CR2 and the hypotenuse portion 12. Further, this second terminal box 62 is attached to the back side of the plate portion 11 with the Y direction as the longitudinal direction.

[0039] As shown in FIGS. 1 and 2, the first end electrode wiring 51 includes a first wiring 51a connected to the negative electrode 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 end on the Y2 direction side of the second cell row CR2, a second wiring 51b extending along the X direction from the end on the Y2 direction side of the first wiring 51a to the vicinity of the end on the X1 direction side of the third cell row CR3, a third wiring 51c extending along the Y direction from the end on the X1 direction side of the second wiring 51b to the vicinity of the end on the Y2 direction side of the third cell row CR3 and connected to the negative electrode side of the third cell row CR3, and a fourth wiring 51d extending in the X1 direction from the end on the Y2 direction side of the third wiring 51c and connected to the - terminal block 61b of the first terminal box 61. Specifically, a wiring member 33 connected to the negative electrode of the solar cell C at the negative electrode side end of the second cell row CR2, which is the negative electrode side end in the series connection direction of the string S1, is connected to the first wiring 51a, and a wiring member 33 connected to the negative electrode of the solar cell C at the negative electrode side end of the third cell row CR3, which is the negative electrode side end in the series connection direction of the string S2, is connected to the third wiring 51c. Thus, the first end electrode wiring 51 is disposed along 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 having a stepped shape. That is, the first end electrode wiring 51 extends along the outer edges of the solar cells C, C,... located at the hypotenuse side end. Further, the first end electrode wiring 51 is disposed on the plate portion 11 which is a region 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 FIGS. 1 and 2, the second end electrode wiring 52 includes a first wiring 52a connected to the positive electrode side of the fifth cell row CR5 and extending along the Y direction to the vicinity of the end on the Y1 direction side of the fifth cell row CR5, a second wiring 52b extending along the X direction from the end on the Y1 direction side of the first wiring 52a to the vicinity of the end on the X1 direction side of the fourth cell row CR4, a third wiring 52c extending along the Y direction from the end on the X2 direction side of the second wiring 52b to the vicinity of the end on the Y1 direction side of the fourth cell row CR4 and connected to the positive electrode side of the fourth cell row CR4, and a fourth wiring 52d extending in the X2 direction from the end on the Y1 direction side of the third wiring 52c and connected to the + terminal block 61a of the first terminal box 61. Specifically, a wiring member 33 connected to the positive electrode of the solar cell C at the positive electrode side end in the series connection direction of the fifth cell row CR5, which is the positive electrode side end of the string S1, is connected to the first wiring 52a, and a wiring member 33 connected to the positive electrode of the solar cell C at the positive electrode side end in the series connection direction of the fourth cell row CR4, which is the positive electrode side end of the string S2, is connected to the third wiring 52c. Thus, the second end electrode wiring 52 is also arranged along 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 in a stepped shape. That is, the second end electrode wiring 52 also extends along the outer edges of the solar cells C, C,... located at the hypotenuse side ends. Further, the second end electrode wiring 52 is arranged in the plate portion 11, which is a region where no solar cell C exists. 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 FIG. 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 each of the solar cells C, C of the fourth cell row CR4 are indicated by phantom lines.

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

[0043] According to this configuration, since there is no possibility that the wirings (the fourth wirings 51d and 52d) connected to the first terminal box 61 will come into contact with the solar cell C, it becomes unnecessary to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, the work of interposing an insulating sheet between the wirings connected to the terminal box and the solar cell C can be made unnecessary.

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

[0045] With this configuration, the possibility that the wiring (first wiring 51a) connected to the second terminal box 62 comes into contact with the solar cell C is eliminated, so there is no need to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, the operation of interposing an insulating sheet between the wiring connected to the terminal box and the solar cell C can be made unnecessary.

[0046] - Effects of the Embodiment - As described above, in the solar cell module 1 according to the present embodiment, each terminal box 61, 62 is disposed such that the positions of the terminal blocks 61a, 61b, 62a are closer to the hypotenuse portion 12 than the solar cell C, and the wirings 51d, 52d, 51a respectively connected to the terminal blocks 61a, 61b, 62a are positioned between the solar cell C and the hypotenuse portion 12. For this reason, since the connection positions of the wirings 51d, 52d, 51a in the terminal boxes 61, 62 and the positions where the wirings 51d, 52d, 51a are separated from the solar cell C (the positions between the hypotenuse portion 12 and the solar cell C and not overlapping the solar cell C) are obtained, there is no possibility that the wirings connected to the terminal boxes 61, 62 and the solar cell C come into contact with each other, and there is no need to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, the work for interposing an insulating sheet between the wirings connected to the terminal boxes 61, 62 and the solar cell C can be made unnecessary, and the productivity of the solar cell module 1 can be improved.

[0047] Note that the fourth wirings 51d, 52d and the first wiring 51a are output wirings of the strings S1, S2 and are wirings connecting the strings S1, S2 and the terminal boxes 61, 62. Further, when the fourth wirings 51d, 52d and the first wiring 51a are connected to the terminal blocks 61a, 61b, 62a, the strings S1, S2 and the terminal boxes 61, 62 are connected. Therefore, in the solar cell module 1 according to the present embodiment, it can also be said that each terminal box 61, 62 is disposed such that the connection position with the string is closer to the hypotenuse portion 12 than the solar cell C, and the wiring connecting the string and the terminal box is positioned between the solar cell C and the hypotenuse portion 12.

[0048] In addition, in the present embodiment, the arrangement positions of the terminal boxes 61 and 62 are arranged at positions on the back side of the solar cell module where there is little overlap with the solar cells C. For this reason, it is possible to suppress the stress due to the weight of the terminal boxes 61 and 62 from acting on the solar cells C (the stress can be reduced compared to the case where the entire terminal box overlaps with the solar cells), and it is possible to suppress the adverse effects on the solar cells C due to this stress.

[0049] In addition, in the present embodiment, the wirings (third wirings 51c and 52c, first wiring 51a) connected to the series connection direction ends of the strings S1 and S2 and the wirings (fourth wirings 51d and 52d, first wiring 51a) connected to the terminal boxes 61 and 62 are integrally formed. That is, by using the wirings (fourth wirings 51d and 52d, first wiring 51a) connected to the terminal boxes 61 and 62 as part of the end electrode wirings (51 and 52), it is possible to realize a configuration in which there is no need to interpose an insulating sheet between the wirings (output wirings) connected to the terminal boxes 61 and 62 and the solar cells C without adding new wirings. Further, since the terminal blocks 61a, 61b, and 62a are located on the extension lines of the wirings (fourth wirings 51d and 52d, first wiring 51a) connected to the terminal boxes 61 and 62, it is possible to connect to the terminal boxes 61 and 62 without adding new wirings.

[0050] In general, a solar cell module having a polygonal outer shape including a hypotenuse has a stepped edge for each solar cell C, C,... on the hypotenuse side. Between the edge of each solar cell C, C,... and the hypotenuse portion 12 (hypotenuse frame portion 25), there is the plate portion 11 which is an area where no solar cell C exists. This plate portion 11 corresponds to a position closer to the hypotenuse portion 12 than the above-described solar cell C or a position between the solar cell C and the hypotenuse portion 12. Then, by disposing the terminals (terminal blocks 61a, 61b, 62a) of the terminal boxes 61, 62 on this plate portion 11 and also positioning the wirings (fourth wirings 51d, 52d, first wiring 51a) connected to the terminal boxes 61, 62 on this plate portion 11, a configuration can be realized in which there is no need to interpose an insulating sheet between the wiring connected to the terminal boxes 61, 62 and the solar cell C. That is, by effectively using this plate portion 11 (the portion where no solar cell C exists), the arrangement positions of the terminal boxes 61, 62 and the end electrode wirings 51, 52 can be secured. Further, since the area of this plate portion 11 is relatively large, a high degree of freedom in arranging the terminal boxes 61, 62 (degree of freedom in arrangement position and arrangement direction) can be obtained.

[0051] [Comparison between the First Embodiment and the Comparative Example] Next, a comparison between the solar cell module 1 according to the first embodiment and a comparative example in which the arrangement position of the terminal box is on the back surface of the solar cell module and on the back side of the solar cell will be described.

[0052] FIG. 5 is a plan view schematically showing a solar cell module a according to a comparative example. Further, FIG. 6 is a plan view for explaining the series connection direction of solar cell elements in each string in the solar cell module a according to this comparative example (in this 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 represent the current flow direction in the first string s1. Also, the white arrows attached to the third cell row cr3 and the fourth cell row cr4 respectively represent the current flow direction in the second string s2). In the comparative example shown in FIG. 5, each of the terminal boxes b and c is disposed on the lower side of the solar cell elements at the end on the X2 direction side of the solar cell module a. Also, in this comparative example as well, similar to the case of the first embodiment, the third cell row cr3 and the fourth cell row cr4 constituting the second string s2 are arranged between the second cell row cr2 and the fifth cell row cr5 constituting the first string s1.

[0053] As shown in FIG. 5, in the case of the comparative example, each cell row cr1, cr2, cr5 (cr3, cr4) constituting the same string s1 (s2) is connected to each other by intermediate electrode wirings d, e, f. Also, the strings s1 and s2 are connected in parallel by end electrode wirings g and h. This will be specifically described below.

[0054] As a connection structure of each cell row cr1, cr2, cr5 constituting the first string s1, 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 d.

[0055] Also, 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 jumping intermediate electrode wiring e.

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

[0057] As the end electrodes wiring g and h, there are provided a first end electrodes wiring g which connects the negative electrode sides of the respective strings s1 and s2 to two terminal boxes b and c, and a second end electrodes wiring h which connects the positive electrode sides of the respective strings s1 and s2 to one terminal box b. The terminal boxes b and c are disposed on the back side of the solar cell module a at positions having a predetermined dimension in the X1 direction with respect to the lower end frame portion i of the frame.

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

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

[0060] The conductor extending along the above-mentioned X direction is the wiring connected to the terminal box. Since this wiring is disposed on the back side of the solar cell, it is necessary to insulate this wiring from the solar cell, and an insulating sheet (not shown) is disposed between this wiring and the solar cell. Therefore, when manufacturing the solar cell module a, an operation for interposing an insulating sheet between the wiring connected to each of the terminal boxes b and c and the solar cell is required.

[0061] Hereinafter, regarding the solar cell module 1 according to the first embodiment and the solar cell module a according to the comparative example, the lengths of the electrode wirings 41 to 43, 51, 52, d to h and the number of soldering portions connecting the respective electrode wirings 41 to 43, 51, 52, d to h will be described.

[0062] FIG. 7 is a diagram corresponding to FIG. 1 for explaining the total lengths and soldering positions of the electrode wirings 41 to 43, 51, 52 in the solar cell module 1 according to the first embodiment. FIG. 8 is a diagram corresponding to FIG. 5 for explaining the total lengths and soldering positions of the electrode wirings d to h in the solar cell module a according to the comparative example. In these figures, the lengths of the respective portions (the linear portions) of the electrode wirings 41 to 43, 51, 52, d to h are shown in the form of balloons when the length in the X direction of the half cell is set to "1". Also, the soldering positions where the electrode wirings 41 to 43, 51, 52, d to h are connected to each other are indicated by broken-line circles.

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

[0064] On the other hand, as shown in FIG. 8, in the solar cell module a according to the comparative example, in addition to the total length of each of the electrode wirings d to h being "38" when the length in the X direction of the half cell is set to "1", the length of the said conducting wire is also necessary. Also, the soldering position is "10".

[0065] As described above, in the first embodiment, it is possible to shorten the total length of the electrode wiring and reduce the number of soldering positions as compared with 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 region (plate portion 11) where the solar cell on the hypotenuse side does not exist, it is also possible to shorten the total length of the electrode wiring and reduce the number of soldering positions.

[0066] [Second Embodiment] Next, the second embodiment will be described. In this embodiment, the arrangement position of the first terminal box 61 is different from that in the first embodiment described above, and accordingly, the arrangement positions of the end electrode wirings 51, 52 are also different. Since the other configurations are the same as those in 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 electrodes 51 and 52 in the present embodiment. In FIG. 9, the same members as those shown in FIG. 4 are denoted by the same reference numerals. Also 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 and C of the fourth cell row CR4 are shown by phantom lines. In FIG. 9, the region between the left side (Y1 direction side) of the solar cells C and C and the hypotenuse portion 12 is the plate portion 11.

[0068] As shown in FIG. 9, the entire first terminal box 61 is located at a position deviated from the solar cell C. Therefore, the positions of the terminal blocks 61a and 61b are also located at positions deviated 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 at positions farther from the solar cell C (positions deviated from the solar cell C in the Y1 direction) than those in the first embodiment. Thus, also in the present embodiment, the first terminal box 61 is disposed such that the positions of the terminal blocks 61a and 61b are closer to the hypotenuse portion 12 than the solar cell C, and the wirings (fourth wirings) 51d and 52d connected to the first terminal box 61 are located between the solar cell C and the hypotenuse portion 12. Note that 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] Also with this configuration, there is no possibility that the wiring connecting the string and the terminal box, that is, the wirings (fourth wirings) 51d and 52d connected to the first terminal box 61, will come into contact with the solar cell C. Therefore, it is not necessary to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, the work for interposing an insulating sheet when disposing the first terminal box 61 can be made unnecessary.

[0070] Further, in the present embodiment, the arrangement position of the first terminal box 61 is set at a position 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 (plate portion 11). Therefore, it is possible to suppress the 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 made smaller than that in the first embodiment), and it is possible to suppress the adverse effect on the solar cell C due to this stress.

[0071] In addition, the arrangement position of the terminal box and the wiring such that the entire terminal box does not overlap with the solar cell C is also applicable 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 terminal block 62a of the second terminal box 62 is set at a position away from the solar cell C in the X1 direction compared to that in the first embodiment shown in FIG. 1, and the entire second terminal box 62 may be arranged on the X1 side of the cell row CR2. Further, the first wiring 51a connected to the terminal block 62a of the second terminal box 62 may be extended in the Y1 direction compared to that in the first embodiment shown in FIG. 1, and the entire second terminal box 62 may be arranged on the Y1 side of the cell row CR2.

[0072] Also, in the present embodiment, similar to the first embodiment, since the terminal blocks 61a and 61b are located on the extension lines of the respective wirings (fourth wirings) 51d and 52d connected to the first terminal box 61, it is possible to connect to the terminal box 61 without adding new wirings.

[0073] Also, in the present embodiment, although the fourth wirings 51d and 52d extend parallel to the outer edge of the hypotenuse portion of the solar cell C, they do not have to be parallel. By extending the fourth wirings 51d and 52d in a direction away from the solar cell C, the arrangement position of the first terminal box 61 may be arranged at a position on the back surface side of the solar cell module 1 where it does not overlap with the solar cell C (plate portion 11).

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

[0075] FIG. 10 is a plan view for explaining the connection state between the first terminal box 61 and the end electrode wirings 51 and 52 in this embodiment. Also in this FIG. 10, the same members as those shown in FIG. 4 are denoted by the same reference numerals. Also in this 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 cell C of the fourth cell row CR4 are each indicated by a virtual line. In FIG. 10, the region between the left side of the solar cells C and C and the hypotenuse portion is the plate portion 11.

[0076] As shown in this FIG. 10, the end electrode wirings 51 and 52 in this embodiment include conductor lines 51e and 52e (portions extending toward the hypotenuse portion 12) that extend from the fourth wirings 51d and 52d (portions extending along the outer edges of the solar cells C and C) toward the respective terminal blocks 61a and 61b. Thereby, while arranging the fourth wirings 51d and 52d at positions close to the solar cells C and C, the entire first terminal box 61 can be positioned at a position deviated from the solar cell C.

[0077] Even with this configuration, there is no possibility that the wiring connecting the string and the terminal box, that is, the wiring connected to the first terminal box 61 (the fourth wirings 51d and 52d and the conductor lines 51e and 52e) and the solar cell C will come into contact with each other. Therefore, it is not necessary to interpose an insulating sheet between them. As a result, when manufacturing the solar cell module 1, the work for interposing an insulating sheet when arranging the first terminal box 61 can be made unnecessary.

[0078] Also, in the present embodiment, similar to that of the second embodiment described above, the arrangement position of the first terminal box 61 is arranged at a position on the back side of the solar cell module 1 where the entire first terminal box 61 does not overlap with the solar cell C (plate portion 11). Therefore, it is possible to suppress the 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 made smaller than that of the first embodiment), and it is possible to suppress the adverse effect on the solar cell C due to this stress.

[0079] In addition, regarding the arrangement position of the terminal box and the wiring such that the entire terminal box does not overlap with the solar cell C, it is also applicable to the second terminal box 62 and the first wiring 51a connected to the second terminal box 62.

[0080] -Other Embodiments- Note that the present disclosure is not limited to the embodiments described above, and can be implemented in various other forms. Therefore, each of the embodiments described above is merely an example in every respect and should not be construed in a limiting sense. The scope of the present disclosure is indicated by the claims and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent 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 in which cell rows CR3 and CR4 constituting another string (the second string in this embodiment) S2 are arranged between a pair of cell rows CR2 and CR5 constituting one string (the first string in this embodiment) S1 among a plurality of strings S1 and S2 has been described. The present disclosure is not limited to this, and is also applicable to a solar cell module in which a string is constituted only by adjacent cell rows.

[0082] In addition, in each of the above embodiments, the number of solar cells C, C, ... in each string S1, S2 is the same. However, the number of cells may be slightly different (for example, different by about one or two). For example, as long as the power loss caused by the difference in the number of solar cells C, C, ... in each string S1, S2 is within an acceptable range, or as long as it has a function of preventing the backflow of current, the number of solar cells C, C, ... in each string S1, S2 may be slightly different.

[0083] In addition, in each of the above embodiments, the solar cell module 1 having two strings S1, S2 is taken as an example for explanation. However, the present disclosure is also applicable to solar cell modules having three or more strings.

[0084] In addition, in each of the above embodiments, as the solar cell C, a cell obtained by dividing a standard-size cell (full cell) in half is used. However, there is no limitation on the number of divisions. For example, it may be divided into 1 / 3, or it may be a full cell. Further, for example, when dividing into 1 / 4, the full cell may be divided into strip shapes or substantially square shapes.

[0085] In addition, in each of the above embodiments, the case where the present disclosure is applied to a single-crystalline solar cell module in which electrodes are formed on both the light-receiving surface and the back surface on the opposite side of the light-receiving surface has been described. However, 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 on the opposite side of the light-receiving surface.

[0086] In addition, 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 as the X direction. Also, in the figure, the height dimension of the solar cell module 1 is small on the left side and large on the right side. However, the form in which the height dimension of the solar cell module 1 is large on the left side and small on the right side in the figure may also be used.

[0087] In each of the above embodiments, the solar cell module 1 according to the present embodiment has a plurality of strings, and the strings are connected in parallel to each other. However, the number of strings may be one. When there is one string, all the cell columns included in the solar cell module 1 are connected in series. Even when there is one string, as in the strings S1 and S2 of the above embodiments, in each cell column, the solar cell cells C included in each cell column are connected in series, and each cell column is connected in series by the intermediate electrode wiring. Further, an end electrode wiring is connected to the end of the series connection direction of the string.

[0088] In each of the above embodiments, the solar cell module 1 according to the present embodiment has a configuration including a plurality of terminal boxes, but the number of terminal boxes may be one.

Industrial Applicability

[0089] The present disclosure is applicable to the corner module of a solar cell.

Explanation of Reference Numerals

[0090] 1 Solar cell module 12 Hypotenuse part 51a First wiring (wiring) 51d, 52d Fourth wiring (wiring) 51e, 52e Conductive wire 61 First terminal box 62 Second terminal box 61a + terminal block 61b, 62a - terminal block C Solar cell CR1~CR5 First to fifth cell columns S1, S2 Strings

Claims

1. A solar cell module comprising a string composed of a plurality of solar cells, a terminal box, a first wiring connecting the negative electrode side of the string and the terminal box, and a second wiring connecting the positive electrode side of the string and the terminal box, and having a polygonal outer shape including a hypotenuse, wherein the solar cell module includes a configuration in which a plurality of cell rows in which the solar cells are arranged in a column direction are arranged in parallel, and the edges of the plurality of solar cells on the hypotenuse side are stepped, and both the first wiring and the second wiring are located between the solar cell located at the end portion on the hypotenuse side and the hypotenuse. A solar cell module characterized by including a portion.

2. In the solar cell module according to Claim 1, the configuration includes a plurality of cell rows in which the number of solar cells arranged in the column direction is different from each other and arranged in parallel, and both the first wiring and the second wiring include a portion extending along the outer edge of the solar cell located at the end portion on the hypotenuse side. A solar cell module characterized by the above.

3. In the solar cell module according to Claim 1, the configuration includes a plurality of cell rows in which the number of solar cells arranged in the column direction is different from each other and arranged in parallel, and both the first wiring and the second wiring include a portion extending along the outer edge of the solar cell located at the end portion on the hypotenuse side and a portion extending toward the hypotenuse. A solar cell module characterized by the above.

4. In the solar cell module according to Claim 1, the configuration includes a plurality of cell rows in which the number of solar cells arranged in the column direction is different from each other and arranged in parallel, and the edges of the respective solar cells located on one side in the column direction in each cell row are arranged on the same straight line. A solar cell module characterized by the above.

5. A solar cell module having a polygonal outer shape including a hypotenuse, comprising two strings composed of a plurality of solar cells, each string is composed of a plurality of cell rows, the plurality of solar cells included in the cell rows are connected in series, the plurality of cell rows constituting each string are connected in series, and the two strings are connected in parallel by a first end electrode wiring connecting the negative electrode sides of the respective strings and a second end electrode wiring connecting the positive electrode sides of the respective strings. The solar cell module is characterized in that the first end electrode wiring and the second end electrode wiring include a portion located between the solar cell positioned at the hypotenuse side end and the hypotenuse.

6. In the solar cell module according to claim 5, the solar cell module is characterized in that the first end electrode wiring and the second end electrode wiring include a portion extending along the outer edge of the solar cell positioned at the hypotenuse side end.

Images