Solar cell modules

Abstract

The present invention provides a solar cell module that can output the power it originally has. In the solar cell module, one or more solar cell units are connected in series to form a plurality of unit groups, and the plurality of unit groups are connected by intermediate electrode wiring to form two string groups, and the two strings are connected in parallel. In the two strings, the number of solar cell units in a first string is equal to the number of solar cell units in a second string.

Description

Technical Field

[0001] The present invention relates to a solar cell module. Background Art

[0002] As a solar cell module, for example, one or more solar cell units are connected in series to form a plurality of unit groups, and the plurality of unit groups are connected via intermediate electrode wiring to form two strings. When the two strings are connected in parallel, there are the following inconveniences.

[0003] That is, in such a solar cell module, when the number of solar cell units in one of the two strings is different from the number of solar cell units in the other, the voltage of one string is different from the other. Thus, a reverse current is generated between the one string and the other string, and power loss increases. Therefore, the power that is originally available cannot be output.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2018 / 173216 Summary of the invention

[0007] Technical Problems to be Solved by the Invention

[0008] In this regard, the solar cell module described in Patent Document 1 merely connects a plurality of cell groups in a complicated manner, rather than connecting two series in parallel in which a plurality of cell groups are connected separately.

[0009] Therefore, the present invention aims to provide a solar cell module capable of outputting the original power when one or more solar cell units are connected in series to form a plurality of unit groups, and the plurality of unit groups are connected via intermediate electrode wiring to form two strings, and the two strings are connected in parallel.

[0010] Solutions to the problem

[0011] In order to solve the above-mentioned problems, in the solar cell module of the present invention, one or more solar cell units are connected in series to form a plurality of unit groups, and the plurality of unit groups are connected by intermediate electrode wiring to form two strings, and the two strings are connected in parallel. It is characterized in that, in the two strings, the number of solar cell units in a first string is equal to the number of solar cell units in the second string.

[0012] Effects of the Invention

[0013] According to the present invention, one or more solar cell units are connected in series to form a plurality of unit groups, and the plurality of unit groups are connected via intermediate electrode wiring to form two string groups. When the two string groups are connected in parallel, the original power can be output. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. 1 is a schematic plan view of an example of a polygonal solar cell module according to the present embodiment.

[0015] Figure 2 FIG. 1 is a schematic plan view of an example of a polygonal solar cell module according to the present embodiment.

[0016] Figure 3A FIG. 1 is a schematic plan view of an example of a rectangular solar cell module according to the present embodiment.

[0017] Figure 3B FIG. 1 is a schematic plan view of an example of a rectangular solar cell module according to the present embodiment.

[0018] Figure 4 A longitudinal cross-sectional view of the internal structure of a solar cell module.

[0019] Figure 5A This is a schematic plan view of a solar cell module in another form different from that of the present embodiment.

[0020] Figure 5B This is a schematic plan view of a solar cell module in another form different from that of the present embodiment.

[0021] Figure 5C This is a schematic plan view of a solar cell module in another form different from that of the present embodiment.

[0022] Figure 5D This is a schematic plan view of a solar cell module in another form different from that of the present embodiment.

[0023] Figure 6 A schematic plan view of a roof with solar cell modules installed.

[0024] Figure 7 for Figure 6 The solar cell modules installed on the installation surface of the roof and the plan view of the module installation area where the rectangular solar cell modules are installed are shown.

[0025] Fig. 8A for Figure 3B A plan view of another example of a solar cell module is shown in FIG.

[0026] Figure 8B for Figure 3BA plan view of yet another example of a solar cell module is shown in FIG.

[0027] Figure 8C for Figure 5A A plan view of a solar cell module shown in FIG.

[0028] Fig. 9 for Figure 1 A plan view of another example of a solar cell module is shown in FIG.

[0029] Fig. 10A for Fig. 8A The solar cell module shown in FIG. 1 is a plan view of a parallel arrangement pattern in which three rows and three columns are arranged in parallel.

[0030] Fig. 10B for Fig. 8A The solar cell modules shown in FIG. are arranged in 2 rows and 2 columns. Figure 8B The solar cell module shown in FIG. 1 is a plan view of a parallel arrangement pattern in which two rows and one column are arranged in parallel.

[0031] Fig. 10C for Fig. 8A The solar cell modules shown in FIG. are arranged in 2 rows and 3 columns. Figure 8C The solar cell module shown in FIG. 1 is a plan view of a parallel arrangement pattern in which two rows and one column are arranged in parallel.

[0032] Fig. 10D for Figure 8B The solar cell module shown in FIG. 1 is arranged in 2 rows and 4 columns and Figure 8C The solar cell module shown in FIG. 1 is a plan view of a parallel arrangement pattern in which one row and four columns are arranged in parallel.

[0033] Fig.11A For Figure 7 The setting pattern shown in the figure is a plan view of different setting patterns.

[0034] Fig. 11B For Figure 7 The setting pattern shown in the figure is a plan view of different setting patterns. DETAILED DESCRIPTION

[0035] Hereinafter, the embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals are used for the same components. The names and functions are also the same. Therefore, the detailed description of the above will not be repeated.

[0036] Figure 1 and Figure 2 as well as Figure 3A , Figure 3B It is a schematic plan view showing an example of solar cell modules M1 and M2 according to the present embodiment. Figure 1 and Figure 2An example of the solar cell module M1 and other examples are shown, respectively, in which the solar cell module body 30 has a polygonal shape (for example, a pentagon, a trapezoid, and a triangle) with right angles and corners other than right angles. Figure 3A and 3B , an example in which the polarity of the solar cell module main body 30 is reversed in an example of a rectangular solar cell module M2 is shown. Figure 1 and Figure 2 The solar cell module M1 shown may have a structure with reverse polarity. Figure 4 It is a longitudinal cross-sectional view of the internal structure of the solar cell modules M1 and M2.

[0037] like Figure 1 and Figure 2 as well as Figure 3A and Figure 3B As shown, the solar cell modules M1 and M2 include two strings S(1) and S(2) connected in parallel. The two strings S(1) and S(2) each include a plurality of unit groups CG(1,1) to CG(1,n1), CG(2,1) to CG(2,n2) (n1, n2 are integers greater than 2). Figure 1 and Figure 2 In the solar cell module M1 shown, n1=2, n2=4, Figure 3A and Figure 3B In the solar cell module M2 shown, n1=3, n2=3.

[0038] The cell groups CG(1,1) to CG(1,n1) and CG(2,1) to CG(2,n2) are connected by intermediate electrode wirings La to La (busbars), respectively. The cell groups CG(1,1) to CG(1,n1) and CG(2,1) to CG(2,n2) include one or more solar cell cells C, C to C (hereinafter simply referred to as C). In the cell groups CG(1,1) to CG(1,n1) and CG(2,1) to CG(2,n2), the solar cell cells C are connected in series.

[0039] In the present embodiment, the solar cell C in the solar cell modules M1 and M2 is obtained by dividing a solar cell substrate of approximately 160 mm square into two parts. That is, the divided solar cell C is formed into a size of approximately 160 mm×80 mm square as a whole.

[0040] like Figure 4As shown, the solar cell C includes a surface electrode 31 and a back electrode 32. The surface electrode 31 is composed of a busbar electrode 31a and a finger electrode not shown. The busbar electrode 31a is in a strip shape and is formed as a straight line along the parallel setting direction X on the surface of the solar cell C. A plurality of finger electrodes are formed by extending in a comb-like shape from the two side edges of the busbar electrode 31a in an orthogonal direction Y orthogonal to the parallel setting direction X. The finger electrodes are spaced apart from each other by a certain interval and are patterned in a manner that covers the entire light-receiving surface of the solar cell C. In addition, the back electrode 32 is formed in a straight strip shape in the parallel setting direction X on the back of the solar cell C and is arranged in a manner opposite to the busbar electrode 31a.

[0041] Solar cell modules M1 and M2 include solar cell C, wiring material 33 (interface), translucent substrate 34 and protective component 35. Solar cell C has a surface electrode 31 and a back electrode 32. Wiring material 33 connects the busbar electrode 31a of the surface electrode 31 of one solar cell C to the back electrode 32 of another solar cell C, and the adjacent solar cells C and C are connected in series. Translucent substrate 34 is connected to the surface side ( Figure 4 The protective member 35 is disposed opposite to the back side of the solar cell unit C ( Figure 4 The middle is the lower side) is set relatively.

[0042] The solar cell modules M1 and M2 are structures in which the solar cell unit C and the wiring material 33 are sealed between the translucent substrate 34 and the protective member 35 through the translucent sealing material 36. The wiring material 33 is formed by coating the outer surface of the substrate formed into a long and narrow strip with solder (solder plating treatment). The material of the substrate is not particularly limited, and for example, metals such as copper can be used.

[0043] One side of the wiring material 33 (at Figure 4 The other side of the wiring material 33 (the left side in the figure) is welded to the busbar electrode 31a on the surface of the solar cell unit C. Figure 4 The back electrode 32 of the back side of the adjacent solar cell C is welded to the back electrode 32 of the adjacent solar cell C. In addition, in the present embodiment, five busbar electrodes are formed in the solar cell C, but there are also cases where one, or two to four, or six or more busbar electrodes are formed. In this case, the back electrode 32 may also be formed as one, or two to four, or six or more busbar electrodes in parallel, and the wiring materials 33 to 33 may also be used as one, or two to four, or six or more busbar electrodes in parallel.

[0044] Furthermore, in the two strings S(1) and S(2), the number of solar cell units C in the first string S(1) is equal to the number of solar cell units C in the second string S(2). Figure 1 and Figure 2 In the example shown, the number of cells of the first string S(1) and the second string S(2) are 8, respectively. Figure 3A and 3B In the example shown, the number of cells of the first string S(1) and the second string S(2) are 30, respectively.

[0045] According to this embodiment, since the number of solar cell units C in the first string S(1) is equal to the number of solar cell units C in the second string S(2), the voltages in one string S(1) and the other string S(2) can be made the same. Therefore, the generation of reverse current between the one string S(1) and the other string S(2) can be avoided, and power loss can be effectively prevented. Therefore, the power that is originally available can be output.

[0046] [First embodiment]

[0047] In this embodiment, if Figure 1 and Figure 2 as well as Figure 3A and Figure 3B As shown, the solar cell units C in the first string S(1) and the solar cell units C in the second string S(2) are arranged in a prescribed parallel arrangement direction X of the solar cell module body 30. The first string S(1) and the second string S(2) are arranged in parallel in an orthogonal direction Y. In each of the first string S(1) and the second string S(2), the unit groups CG(1, 1) to CG(1, n1), CG(2, 1) to CG(2, n2) are arranged in parallel in the orthogonal direction Y. The end electrode wirings Lb to Lb (busbars) connected to at least one side of the unit groups CG(1, 1) to CG(1, n1), CG(2, 1) to CG(2, n2) are arranged at the end on at least one side of the parallel arrangement direction X of the solar cell module body 30. Figure 1 and Figure 2 In the example shown, the end electrode wirings Lb to Lb connected to both sides of the cell groups CG (1, 1) to CG (1, n1) and CG (2, 1) to CG (2, n2) are arranged at the end on one side (X1) of the parallel arrangement direction X of the solar cell module body 30. Figure 3A and 3B In the example shown, the end electrode wiring Lb~Lb connected to both sides of the unit groups CG(1,1)~CG(1,n1), CG(2,1)~CG(2,n2) is arranged at the ends on both sides (X1, X2) of the parallel arrangement direction X of the solar cell module body 30.

[0048] exist Figure 1 In the example shown, the end electrode wiring Lb of the cell group CG (1, 1) and the end electrode wiring Lb of the cell group CG (2, n2) are connected to the connection electrode wiring Lc1. The end electrode wiring Lb of the cell group CG (1, n1) and the cell group CG (2, 1) are connected to the connection electrode wiring Lc2. Figure 2 In the example shown, the end electrode wiring Lb of the cell group CG (1, 1) and the end electrode wiring Lb of the cell group CG (2, 1) are connected to the connection electrode wiring Lc1. The end electrode wiring Lb of the cell group CG (1, n1) and the end electrode wiring Lb of the cell group CG (2, n2) are connected to the connection electrode wiring Lc2. Figure 3A and 3B In the example shown, the end electrode wire Lb of the cell group CG (1, 1) and the end electrode wire Lb of the cell group CG (2, n2) are connected to the connection electrode wires Lc1 and Lc2. The end electrode wire Lb of the cell group CG (1, n1) and the cell group CG (2, 1) are connected to the connection electrode wires Lc2 and Lc1. Figure 1 and Figure 2 In the example shown, the solar cell module body 30 may be output from the ends on both sides (X1, X2) of the parallel arrangement direction X. Figure 3A and Figure 3B In the example shown, the light may be output from the end on one side of the parallel arrangement direction X of the solar cell module body 30 .

[0049] [Second Embodiment]

[0050] In this embodiment, the end electrode wire Lb provided at the end of one side (X1) of the solar cell module body 30 in the parallel arrangement direction X is provided along the orthogonal direction Y. In this way, the solar cell module body 30 can be made compact in the parallel arrangement direction X.

[0051] [Third Embodiment]

[0052] In the present embodiment, at least one of the solar cell units C~C in the first string S(1) and the second string S(2) is composed of a split unit. Here, the so-called split unit is a small unit obtained by splitting a standard-sized unit (a unit corresponding to one solar cell wafer, also referred to as a full unit). As a split unit, for example, a standard-sized unit can be split into half units (half units) or into 1 / 4 units. Therefore, the current value of the current of each unit can be reduced (halved in the case of a half unit), thereby reducing the power loss of the solar cell module. In the present embodiment, the solar cell units C~C are half units.

[0053] [Fourth Embodiment]

[0054] exist Figure 1 and Figure 2 In the example shown, the solar cell module M1 is formed as a polygon in which the solar cell module body 30 has right angles and corners other than right angles. As the polygon, for example, a pentagon with three right angles, a quadrilateral with two right angles, or a right triangle can be given. In this example, the polygon is a pentagon with three right angles. In this way, the application of the solar cell module M1 can be expanded.

[0055] exist Figure 1 and Figure 2 In the example shown, the polygon is a pentagon with three right angles, a quadrilateral with two right angles, or a right triangle, so the solar cell module M1 can match a roof with corners having angles other than right angles (such as a roof of a four-slope roof, etc.) to set a pentagonal, quadrilateral, or right triangle solar cell module M1. Thus, it can be effectively set on a roof with corners having angles other than right angles (such as a roof of a four-slope roof, etc.).

[0056] (Other solar cell module methods)

[0057] FIG. 5A to FIG. 5D FIG. 2 is a schematic plan view showing another embodiment of the solar cell modules M1 and M2 different from the present embodiment. Figures 5A to 5D , an example is shown in which the solar cell module body 30x connects a plurality of strings Sx(1) to Sx(m) (m is an integer greater than or equal to 2) in series in a rectangular solar cell module Mx.

[0058] like FIG. 5A to FIG. 5D As shown, the solar cell module Mx includes a plurality of strings Sx(1) to Sx(m) connected in series. FIG. 5A to FIG. 5D In the solar cell module Mx shown, m = 3. The plurality of strings S(1) to S(m) each have two cell groups CGx(1,1) to CGx(1,2) and CGx(m,1) to CGx(m,2).

[0059] The cell groups CGx(1,1) to CGx(1,2) and CGx(m,1) to CGx(m,2) are connected by intermediate electrode wirings La to La (busbars), respectively. The cell groups CGx(1,1) to CGx(1,2) and CGx(m,1) to CGx(m,2) include one or more solar cell units C. In the cell groups CGx(1,1) to CGx(1,2) and CGx(m,1) to CGx(m,2), the solar cell units C are connected in series. Two cell groups CGx(1,1) to CGx(1,2) and CGx(m,1) to CGx(m,2) are connected in parallel by intermediate electrode wirings La to La.

[0060] A plurality of strings Sx(1) to Sx(m) are arranged in parallel in the orthogonal direction Y. In each of the plurality of strings Sx(1) to Sx(m), cell groups CGx(1,1) to CGx(1,2) and CGx(m,1) to CGx(m,2) are arranged in parallel in the orthogonal direction Y. The plurality of strings Sx(1) to Sx(m) are connected in series via end electrode wirings Lb to Lb (busbars), respectively.

[0061] In addition, the internal structure of the solar cell module Mx is similar to Figure 4 The internal structures of the solar cell modules M1 and M2 are the same, and the description thereof is omitted here.

[0062] (Solar cell module method)

[0063] exist Figure 5A In the solar cell module Mx shown, the end electrode wiring Lb of positive polarity or negative polarity (positive polarity in this example) is provided on the string Sx(1) at the end on one side (X1) of the parallel arrangement direction X and on one side (Y1) of the orthogonal direction Y. The end electrode wiring Lb of the other polarity (negative polarity in this example) is provided on the string Sx(m) at the end on the other side (X2) of the parallel arrangement direction X and on the other side (Y2) of the orthogonal direction Y.

[0064] exist Figure 5B In the solar cell module Mx shown, the end electrode wiring Lb of positive polarity or negative polarity (positive polarity in this example) is provided on the string Sx(1) on one side (Y1) of the orthogonal direction Y at the end on the other side (X2) of the parallel arrangement direction X. The end electrode wiring Lb of the other polarity (negative polarity in this example) is provided on the string Sx(m) on the other side (Y2) of the orthogonal direction Y at the end on one side (X1) of the parallel arrangement direction X.

[0065] exist Figure 5CIn the solar cell module Mx shown, the end electrode wiring Lb of positive polarity or negative polarity (positive polarity in this example) is provided on the string Sx(1) on one side (Y1) of the orthogonal direction Y at the end on one side (X1) of the parallel arrangement direction X. The end electrode wiring Lb of the other polarity (negative polarity in this example) is provided on the string Sx(2) at the center of the orthogonal direction Y at the end on the other side (X2) of the parallel arrangement direction X.

[0066] exist Figure 5D In the solar cell module Mx shown, the end electrode wiring Lb of the positive polarity or the negative polarity (positive polarity in this example) is provided in the string Sx(2) at the end on the other side (X2) of the parallel arrangement direction X and in the center of the orthogonal direction Y. The end electrode wiring Lb of the other polarity (negative polarity in this example) is provided in the string Sx(1) at the end on one side (X1) of the parallel arrangement direction X and on one side (Y1) of the orthogonal direction Y.

[0067] [Fifth Embodiment]

[0068] [Installing solar cell modules on the roof]

[0069] Figure 6 1 is a schematic plan view showing a roof 10 on which solar cell modules M1, M2 and Mx are provided. Figure 7 It is shown Figure 6 The schematic plan view of the solar cell module M1 and the rectangular solar cell module M2 arranged on the installation surface α of the roof 10 and the module installation area β is shown.

[0070] Fig. 8A and Figure 8B To show respectively Figure 3B 2 is a plan view of another example and still another example of the solar cell module M2 shown in FIG. Figure 8C To show Figure 5A A plan view of a solar cell module Mx is shown in FIG. Fig. 9 It is shown Figure 1 FIG. 2 is a plan view of another example of a solar cell module M1 shown.

[0071] Fig. 8A and Figure 8B The solar cell modules M21 and M22 shown in FIG. Figure 3B The number of solar cell units C in the cell groups CG(1,1) to CG(1,n1) and CG(2,1) to CG(2,n2) in the solar cell module M2 shown in FIG. 9 and 7 solar cell modules M2 and M2 are connected in series. Fig. 8AThe solar cell module M21 shown can output power equivalent to 54 full cells (108 half cells) connected in series [equivalent to 54 right angles (108 half cells)]. Figure 8B The solar cell module M22 shown can output power equivalent to 42 full cells (84 half cells) connected in series [equivalent to 42 right angles (84 half cells)].

[0072] Figure 8C The solar cell module Mx shown is Figure 5A The solar cell modules Mx shown are identical. Figure 8C The solar cell module Mx ( Figure 5A The solar cell module Mx shown can output power equivalent to 30 full cells (60 half cells) connected in series [equivalent to 30 right angles (60 half cells)].

[0073] Fig. 9 The solar cell module M1 shown is Figure 1 The solar cell module M1 shown is symmetrical along the central axis of the parallel arrangement direction X passing through the center of the orthogonal direction Y as a reference line. Fig. 9 The solar cell module M1 shown can output power equivalent to 20 full cells (40 half cells) connected in series [equivalent to 20 right angles (40 half cells)].

[0074] (Pattern of parallel arrangement of solar cell modules)

[0075] Fig. 10A for Fig. 8A The solar cell modules M21 shown in FIG. 1 are arranged in parallel in a plan view in a parallel arrangement pattern PTa1 with three rows and three columns. Fig. 10B for Fig. 8A The solar cell modules M21 shown in FIG. 1 are arranged in 2 rows and 2 columns. Figure 8B The solar cell modules M22 shown in FIG. 1 are plan views showing a parallel arrangement pattern PTa2 in which two rows and one column are arranged in parallel. Fig. 10C for Fig. 8A The solar cell module M21 shown in FIG. 1 is arranged in 2 rows and 3 columns. Figure 8C The solar cell modules Mx shown in FIG. 1 are plan views of a parallel arrangement pattern PTa3 in which two rows and one column are arranged in parallel. Fig. 10D for Figure 8B The solar cell module M22 shown in FIG. 1 is arranged in 2 rows and 4 columns. Figure 8C The solar cell modules Mx shown in FIG. 1 are plan views of a parallel arrangement pattern PTa4 in which one row and four columns are arranged in parallel.

[0076] exist Fig. 10AIn the parallel arrangement pattern PTa1 shown, it is possible to output power equivalent to 54 full cells (108 half cells) connected in series in 3 rows and 3 columns. Fig. 10B In the parallel arrangement pattern PTa2 shown, it is possible to output power equivalent to 2 rows and 2 columns of 54 full cells (108 half cells) connected in series, and power equivalent to 2 rows and 1 column of 42 full cells (84 half cells) connected in series. Fig. 10C In the parallel arrangement pattern PTa3 shown, it is possible to output power equivalent to 2 rows and 3 columns of 54 full cells (108 half cells) connected in series, and power equivalent to 2 rows and 1 column of 30 full cells (60 half cells) connected in series. Fig. 10D In the parallel arrangement pattern PTa4 shown, power equivalent to 42 full cells (84 half cells) connected in series for 2 rows and 4 columns and power equivalent to 30 full cells (60 half cells) connected in series for 1 row and 4 columns can be output.

[0077] Fig.11A and Fig. 11B For Figure 7 2 is a plan view of arrangement patterns PTb2 and PTb3 that are different from the arrangement pattern PTb1 shown in FIG.

[0078] Fig.11A The setting pattern PTb2 shown is, Figure 7 In the arrangement pattern PTb1 shown, the two sides of the module arrangement area β are replaced by Figure 3A The rectangular solar cell module M2 shown is arranged Figure 8C The rectangular solar cell module Mx shown is arranged in the module arrangement area β Fig. 8A The rectangular solar cell module M21 shown. Fig.11A In the setting pattern PTb2 shown, the power of 3 cells equivalent to 54 full cells (108 half cells) connected in series, 6 cells equivalent to 30 full cells (60 half cells) connected in series, and 6 cells equivalent to 20 full cells (40 half cells) connected in series can be output [equivalent to 54 right angles (108 half cells) & equivalent to 30 right angles (60 half cells) & equivalent to 3 rows of 20 right angles (40 half cells) of pentagons].

[0079] Fig. 11B The setting pattern PTb3 shown is, Figure 7 In the arrangement pattern PTb1 shown, the two sides of the module arrangement area β are replaced by Figure 3A The rectangular solar cell module M2 shown is arranged Figure 8C The rectangular solar cell module Mx shown is arranged in the module arrangement area β Figure 8BThe rectangular solar cell module M22 shown. Fig. 11B In the setting pattern PTb3 shown, the power of 3 units equivalent to 42 full units (84 half units) connected in series, 6 units equivalent to 30 full units (60 half units) connected in series, and 6 units equivalent to 20 full units (40 half units) connected in series can be output [equivalent to 42 right angles (equivalent to 84 half units) & equivalent to 30 right angles (equivalent to 60 half units) & equivalent to 20 right angles of pentagonal corners (equivalent to 40 half units) 3 rows].

[0080] [Other embodiments]

[0081] In the first to fifth embodiments, as the solar battery cells, cells obtained by dividing a standard-sized cell (full cell) into half are used, but cells may be divided into 1 / 4 or full cells may be used.

[0082] In addition, in the first to fifth embodiments, it is applicable to a single crystal solar cell module having electrodes formed on both the light-receiving surface and the back surface on the opposite side of the light-receiving surface, and it is also applicable to a back electrode type solar cell module (so-called back contact type solar cell module) having a p-type electrode and an n-type electrode formed on the back surface on the opposite side of the light-receiving surface.

[0083] The present invention is not limited to the above-described embodiments and can be implemented in various other forms. Therefore, the embodiments involved are only exemplary in all aspects and cannot be interpreted restrictively. The scope of the present invention is shown in the claims and is not subject to any limitation herein. In addition, all deformations or changes belonging to the equivalent scope of the claims are within the scope of the present invention.

[0084] Description of Reference Numerals

[0085] 10Roof

[0086] 30 Solar cell module body

[0087] C Solar cell

[0088] CG Unit Group

[0089] La Intermediate Electrode Wiring

[0090] Lb end electrode wiring

[0091] Lc connection electrode wiring

[0092] M1 Solar Cell Module

[0093] M2 Solar Cell Module

[0094] M21 Solar Cell Module

[0095] M22 Solar Cell Module

[0096] PTa1 Parallel setting pattern

[0097] PTa2 parallel setting pattern

[0098] PTa3 parallel setting pattern

[0099] PTa4 parallel setting pattern

[0100] PTb1 Set pattern

[0101] PTb2 Set pattern

[0102] PTb3 Setting Pattern

[0103] S string

[0104] X parallel setting direction

[0105] Y orthogonal direction

[0106] α Setting surface

[0107] β Module settings area

Claims

1. A solar cell module, characterized in that: It consists of two strings connected in parallel, The two strings each include a plurality of cell groups, each of which is composed of one solar cell or a plurality of solar cells connected in series. The solar cell units of the plurality of unit groups are arranged in a row in a predetermined parallel arrangement direction of the solar cell module body, and the plurality of unit groups are arranged side by side in an orthogonal direction orthogonal to the parallel arrangement direction. The plurality of unit groups are connected via intermediate electrode wirings, In the two strings, the number of solar cell units in one string, i.e., the first string, is equal to the number of solar cell units in the other string, i.e., the second string. The solar cell module body is formed into a polygon having right angle corners and corners at angles other than right angles. In the solar cell module, the number of the cell groups in the first string is different from the number of the cell groups in the second string, the multiple cell groups included in the first string are arranged side by side adjacent to each other, the multiple cell groups included in the second string are arranged side by side adjacent to each other, and the cell group in the first string closest to the second string and the cell group in the second string closest to the first string are arranged side by side adjacent to each other and have different numbers of cells, At the end of one side of the parallel arrangement direction of the solar cell module body, the positive polarity end electrode wiring connected to the end of the first string and the positive polarity end electrode wiring connected to the end of the second string are connected in parallel or share the same end electrode wiring, At the end of one side of the parallel arrangement direction of the solar cell module body, the negative polarity end electrode wiring connected to the end of the first string and the negative polarity end electrode wiring connected to the end of the second string are connected in parallel or share the same end electrode wiring.

2. The solar cell module according to claim 1, characterized in that: At the end portion of the solar cell module body on the one side where the end electrode wiring is provided, the intermediate electrode wiring is provided between two adjacent end electrode wirings.

3. The solar cell module according to claim 1, characterized in that: The polygon is a pentagon having three right-angled corners, a quadrilateral having two right-angled corners, or a right triangle.

4. The solar cell module according to claim 1, characterized in that: At least one of the solar cell units in the first string and the second string is composed of a split unit.

5. A solar cell module, characterized in that: The solar cell module according to claim 1 and a rectangular solar cell module are connected.

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