Solar cell module

Abstract

A solar cell module of the present application has connection portions at first and second ends in a first direction of each of at least three solar cell unit strings, and has wiring members at the first and second ends, the wiring members connecting the connection portions at the first and second ends of at least two of the at least three solar cell unit strings. The solar cell module has a first sheet arranged so that the wiring member at the first end is in a prescribed positional relationship with respect to the wiring member at the second end, and a second sheet arranged so that the wiring member at the second end is in a prescribed positional relationship with respect to the wiring member at the first end.

Description

[0001] REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on Japanese Patent Application No. 2020-70450 filed on May 22, 2020 and the content thereof is incorporated in this application by reference. TECHNICAL FIELD

[0003] The present application relates to a light collecting type solar cell module configured by arranging at least three solar cell strings spaced apart in a second direction, wherein the solar cell string is configured by electrically connecting a plurality of solar cell units arranged in a first direction. BACKGROUND

[0004] By using the above-described solar cell module for, for example, a glass building material, it is possible to generate electricity by the solar cell strings and collect light from the space between the solar cell strings adjacent in the second direction to the interior. Also, in the case of assembling the solar cell strings to configure the solar cell module, for example, arranging a plurality of solar cell strings spaced apart in the second direction on a glass substrate arranged on the back surface side opposite to the light receiving surface side, connecting the same end portions of the solar cell strings adjacent in the second direction by a wiring extending across between the two end portions, thereby electrically connecting the solar cell strings adjacent in the second direction to each other (for example, refer to International Publication No. 2019 / 172258 Figure 5 ).

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] PATENT LITERATURE 1 International Publication No. 2019 / 172258

[0008] SUMMARY OF THE INVENTION

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] Therefore, in the case of using the above-described solar cell module for a glass building material, in order to improve the design, the length of each solar cell string is configured to connect a plurality of elongated solar cell units and be able to cover substantially the entire area of the lateral width of the glass building material, and the elongated solar cell string configured is arranged spaced apart in the second direction, that is, the vertical (up and down) direction on the entire area of the glass building material, thereby configured in a style like a louver. Therefore, not only it is necessary to arrange the plurality of elongated solar cell strings with the prescribed position, but also it is necessary to connect by the wiring in a manner that the end portions of the solar cell strings adjacent in the vertical direction do not misalign with each other, and the assembly work is very troublesome, and there is room for improvement. SUMMARY

[0011] Problem to be Solved by the Invention

[0012] Therefore, the present application, in view of the actual situation, its problem is to provide a solar cell module can easily carry out the assembly work.

[0013]

Means for Solving the Problem

[0014] The solar cell module of the present application, characterized in that, has: at least three solar cell unit string, each solar cell unit string is configured, electrically connected with a plurality of solar cell units in the first direction parallel, along the first direction has a first end and a second end, in a manner to set the light receiving surface along the second direction relative to the first direction cross each other spaced apart space; configured in the surface side provided with the first transparent plate light receiving surface; configured in the back side opposite to the surface side of the second transparent plate, the at least three solar cell unit string respectively in the first end and the second end has the connection part can be electrically connected, respectively has a wiring component in the first end and second end, the wiring component between the first end of the at least three solar cell unit string in each of the at least two solar cell string and the second end of the at least two solar cell string respectively between the connection part, each other electrically connected, the solar cell module has: the first sheet is set to make the first end respectively has the wiring component relative to the second end respectively has the wiring component corresponding to the first end of the second end becomes a specified positional relationship; the second sheet is set to make the second end respectively has the wiring component relative to the first end respectively has the wiring component corresponding to the second end of the first end becomes a specified positional relationship.

[0015] It can also be configured, by the plurality of solar cell unit is shingle connected to constitute each solar cell unit string.

[0016] It can also be configured, the wiring component respectively has a connecting part extending in the first direction.

[0017] It can also be configured, the width of the second direction of the connecting part is about the same size as the width of the second direction in the connection part of each solar cell unit string. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the front view of the glass building material constituted by assembling the solar cell module of the present application into the frame member.

[0019] Figure 2 is the front view showing the structure of the solar cell module.

[0020] Figure 3 is Figure 2 the enlarged view of the main part of

[0021] Figure 4 This is a front view of the connection part of the solar cell unit string and the parts that make up the solar cell module.

[0022] Figure 5 This is an exploded view of the components that make up a solar cell module.

[0023] Figure 6 This is a cross-sectional view showing the state of shingled solar cell strings.

[0024] Figure 7A This is a front view of the main part of another embodiment of the wiring component that connects the same end of adjacent solar cell strings in the second direction.

[0025] Figure 7B This is a front view of the main part of another embodiment of the wiring component that connects the same end of adjacent solar cell strings in the second direction.

[0026] Figure 7C This is a front view of the main part of another embodiment of the wiring component that connects the same end of adjacent solar cell strings in the second direction.

[0027] Figure 8A This is a front view showing two different forms of the first sheet and the wiring components formed on the first sheet.

[0028] Figure 8B It means in Figure 8A , Figure 8C A front view showing the status of the circuit connected to the negative side.

[0029] Figure 8C This is a front view showing two different forms of the first sheet and the wiring components formed on the first sheet.

[0030] Figure 9A This is a front view showing the first sheet and other forms of wiring components formed on the first sheet.

[0031] Figure 9B It means in Figure 9A A front view showing the wiring component of the first sheet connected to the negative side circuit and the second sheet connected to the positive side circuit. Detailed Implementation

[0032] Hereinafter, a solar cell module according to one embodiment of the present invention will be described with reference to the accompanying drawings.

[0033] Figure 1The glass building material 3 is constructed by assembling a louver-style, light-transmitting solar cell module into the frame component 2 (embedded). The frame component 2 has a rectangular main shape. Figure 1 The glass component (square in the center and open on the inside) has a rectangular cross-section with one side missing. This glass component 3 is assembled into an opening (not shown) formed in the building. Furthermore, Figure 1 In this embodiment, the left-right direction (horizontal) of the main view is defined as the first direction, and the up-down direction (vertical) orthogonal to the left-right direction (horizontal) is defined as the second direction. Furthermore, in this embodiment, the direction orthogonal to the first direction is defined as the second direction, but a direction intersecting the first direction at an angle other than a right angle can also be defined as the second direction. Additionally, although the first direction is defined as the left-right direction, any direction is acceptable.

[0034] The solar cell module is configured to have a slightly smaller shape than the frame component 2, and to arrange multiple solar cell strings 4 along a first direction, with adjacent solar cell strings 4, 4 spaced apart by a light-receiving space 5 in a second direction. In this embodiment, as... Figure 3 As shown, the structure formed by connecting five adjacent solar cell units in series in the second direction is considered as one unit, and all units ( Figure 3 The diagram shows two units connected in parallel to form a solar cell module. Furthermore, as shown... Figures 2-4 As shown, the solar cell string 4 constituting unit 1 has a first solar cell string 41, a second solar cell string 42, a third solar cell string 43, a fourth solar cell string 44, and a fifth solar cell string 45 from the bottom side.

[0035] A solar cell string 4 is constructed by arranging multiple (e.g., 60) solar cell cells in a first direction and connecting adjacent solar cell cells in series in the first direction. The size 'a' of the second direction (width) of each solar cell cell is (refer to...). Figure 2 (The enlarged view) is, for example, 4mm. Additionally, the size b of the space 5 between adjacent solar cell strings 4, 4 in the second direction (refer to...) Figure 2 The enlarged view shows that the size of the solar cell unit in the second direction (width) is 4 mm.

[0036] like Figure 5As shown, a high-transmittance (float) unreinforced glass 6, serving as a first transparent plate, and a transparent solar cell-specific sealing component (hereinafter referred to as "first sealing component") 7, approximately the same size as the high-transmittance (float) unreinforced glass 6, are arranged on the surface side of the solar cell module with a light-receiving surface. A high-transmittance (float) unreinforced glass 11, serving as a second transparent plate, and a transparent solar cell-specific sealing component (hereinafter referred to as "second sealing component") 12, approximately the same size as the high-transmittance (float) unreinforced glass 11, are arranged on the back side of the solar cell module opposite to the light-receiving surface. Furthermore, a plurality of solar cell cell strings 4 are arranged between the upper first sealing component 7 and the lower second sealing component 12. The first sealing component 7 and the second sealing component 12 are formed of the same resin material; examples of such materials include EVA, PO (polyolefin), PVB (polyvinyl butyral), and ionomers.

[0037] At both ends of each solar cell string 4 in the first direction, namely the first end and the second end (left and right ends in the diagram), there are connecting portions 4A and 4B extending in a straight line on the outer side of the first direction (end side of each solar cell string 4) (see reference). Figure 4 and Figure 5 ),like Figure 4 and Figure 5 As shown, these connecting parts 4A and 4B are connected to the first to fourth wiring components 16 to 19, which are positioned and fixed on the wiring sheets 13 and 14 shown on the left and right sides of the figure. The wiring sheets 13 and 14 are disposed on the surfaces of the two ends of the second sealing component 12 on the back side in the first direction.

[0038] like Figure 3 and Figure 4 As shown, the wiring sheet (hereinafter referred to as "the first sheet") 13 located on the left side of the figure has a first wiring component 16 and a pair of third wiring components 18, 18. The first wiring component 16 is electrically connected to the first wiring, i.e., the negative side line 15, which is connected to the negative terminal. The pair of third wiring components 18, 18 are arranged vertically and connected to the left end (first end) of the four solar cell unit strings 4 arranged in parallel in the second direction. The wiring sheet (hereinafter referred to as "the second sheet") 14 located on the right side of the figure has a pair of second wiring components 17, 17 and a fourth wiring component 19 connected to it. The pair of second wiring components 17, 17 are arranged vertically and connected to the right end (second end) of the four solar cell unit strings 4 arranged in parallel in the second direction. The fourth wiring component 19 is electrically connected to the second wiring, i.e., the positive side line 20, which is connected to the positive terminal.

[0039] The first wiring component 16 and the fourth wiring component 19 are made of conductive metal. The first wiring component 16 and the fourth wiring component 19 have the same shape, configured as rectangles extending linearly in the first direction. The size (width) of the short side of the first wiring component 16 and the fourth wiring component 19 is configured to be approximately the same as the size (width) of the connection portions 4A and 4B of the solar cell string 4 in the second direction. The first wiring component 16 is fixed to the lower part of the first sheet 13 in a position along the first direction, and the fourth wiring component 19 is fixed to the upper part of the second sheet 14 in a position along the first direction. Additionally, as... Figure 4 As shown, the inner end 16E of the first wiring component 16 and the inner end 19E of the fourth wiring component 19 are consistent with the inner end 13E of the first sheet 13 and the inner end 14E of the second sheet 14.

[0040] The second wiring component 17 and the third wiring component 18 are identical in shape, each having a pair of upper and lower connecting portions 17A, 17A, 18A, 18A and connecting portions 17B, 18B. The pair of upper and lower connecting portions 17A, 17A, 18A, 18A are straight, horizontally elongated rectangles extending in the first direction. The connecting portions 17B, 18B are straight, vertically elongated rectangles connecting the left and right outer separating sides of the pair of upper and lower connecting portions 17A, 17A, 18A, 18A in the vertical direction. Above the first wiring component 16, the lower third wiring component 18 is fixed to the first sheet 13 at a predetermined interval, and the upper third wiring component 18 located above the lower third wiring component 18 is also fixed to the first sheet 13. In addition, below the fourth wiring component 19, the upper second wiring component 17 is fixed in a position on the second sheet 14 at a predetermined interval, and the lower second wiring component 17 located below the upper second wiring component 17 is fixed in a position on the second sheet 14.

[0041] In addition, such as Figure 4As shown, the inner ends 17E of the pair of connecting portions 17A, 17A of the second wiring component 17 and the inner ends 18E of the pair of connecting portions 18A, 18A of the third wiring component 18 coincide with the inner ends of the second sheet 14 and the first sheet 13. Therefore, by simply aligning the orientation of the solar cell string 4 and connecting the connecting portions 4A, 4B of the solar cell string 4 to the pair of connecting portions 17A, 17A, 18A, 18A extending in the first direction, the solar cell string 4 can be connected to the wiring components 16-19 in an aligned state. When connecting the connecting portions 4A, 4B of the solar cell string 4 to the wiring components 16-19, methods such as welding, bonding based on conductive adhesive, and bonding based on conductive film are used.

[0042] Furthermore, the width of each of the pair of connecting portions 17A, 17A, 18A, 18A in the second direction is configured to be approximately the same as the width of the connecting portions 4A, 4B of the solar cell string 4 in the second direction. Therefore, by connecting the connecting portions 4A, 4B of the solar cell string 4 to the pair of connecting portions 17A, 17A, 18A, 18A in a aligned state, the solar cell string 4 can be connected to the wiring components 16-19 in an aligned state.

[0043] The first wiring component 16 and the third wiring components 18 are disposed on the first sheet 13, which is fixed in the first direction at one end of the surface of the second sealing member 12, in a predetermined positional relationship relative to the second wiring components 17 and 17 and the fourth wiring component 19. The second wiring components 17 and 17 and the fourth wiring component 19 are disposed on the second sheet 14, which is fixed in the first direction at the other end of the surface of the second sealing member 12, in a predetermined positional relationship relative to the first wiring components 16 and the third wiring components 18 and 18.

[0044] like Figure 4As shown, the specified positional relationship refers to the positional relationship in which the first wiring component 16 is opposite to the lower connecting portion 17A of the second wiring component 17 located on the lower side of the second sheet 14 in the first direction, or in the same positional relationship in the second direction. Additionally, it refers to the positional relationship in which the lower connecting portion 18A of the third wiring component 18 located on the lower side of the first sheet 13 is opposite to the upper connecting portion 17A of the second wiring component 17 located on the lower side of the second sheet 14 in the first direction, or in the same positional relationship in the second direction. Furthermore, it refers to the positional relationship in which the upper connecting portion 18A of the third wiring component 18 located on the lower side of the first sheet 13 is opposite to the lower connecting portion 17A of the second wiring component 17 located on the upper side of the second sheet 14 in the first direction, or in the same positional relationship in the second direction. Furthermore, this refers to the positional relationship in which the connecting portion 18A below the upper third wiring component 18 in the first sheet 13 is opposite to the connecting portion 17A above the upper second wiring component 17 in the second sheet 14 in the first direction, or the positional relationship in the second direction is the same. Additionally, this refers to the positional relationship in which the connecting portion 18A above the upper third wiring component 18 in the first sheet 13 is opposite to the fourth wiring component 19 in the first direction, or the positional relationship in the second direction is the same. Furthermore, as methods for providing the first wiring components 16 to the fourth wiring components 19 on the first sheet 13 and the second sheet 14, examples include screen printing using conductive paste and electroplating using copper plating.

[0045] like Figure 2 As shown, the negative side line 15 is introduced into the negative side terminal box T1 located on the left side of the upper end, which has a bypass diode D for preventing reverse current flow. Meanwhile, the positive side line 20 is introduced into the positive side terminal box T2 located on the right side of the upper end and is connected to the power output line H for outputting power.

[0046] The first sheet 13 and the second sheet 14 have the same structure, such as Figure 4 As shown, it is configured as a long rectangle and is made of PI (polyimide), PET (polyethylene terephthalate), etc., and is black in color. Additionally, a wiring shielding component 21, configured as a long rectangle of the same size (see reference...) Figure 1 and Figure 5 They are arranged in a covering manner on each of the first sheet 13 and the second sheet 14. Each wiring shield 21 is made of PET (polyethylene terephthalate) or the like and is black in color.

[0047] By simply connecting the first solar cell string 41 to the fifth solar cell string 45, configured as described above, to the first wiring member 16 to the fourth wiring member 19, which are positioned on the first sheet 13 and the second sheet 14 in a predetermined relationship, the first solar cell string 41 to the fifth solar cell string 45 can be arranged in a predetermined posture. Therefore, the work of aligning the edges of multiple, especially elongated, solar cell strings at predetermined positions and the work of connecting the ends of adjacent solar cell strings to each other by wiring can be omitted.

[0048] Figure 6 The diagram illustrates the arrangement of the multiple solar cell units 22 constituting the solar cell unit string 4 in this embodiment. That is, the arrangement of... Figure 6 The back bus electrodes 24 of the solar cell unit 22 located on the upper side are arranged overlappingly on the middle side. Figure 6 On the bus electrodes 23 of the solar cell unit 22 located on the lower side, the overlapping portions of the bus electrodes 23, 24 are electrically connected via conductive components 25 (this method of connecting multiple solar cell units 22 is called "shingled connection"). Furthermore, Figure 6 The shaded areas on the top and bottom of the semiconductor substrate 26 are finger lines 27 formed on the surface and back of the semiconductor substrate 26. With this configuration, multiple solar cell units 22 are connected in series to form a solar cell string 4. Thus, electrical connection between solar cell units can be achieved simply by shingling multiple solar cell units 22, making it easy to construct the solar cell string 4.

[0049] Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can certainly be made without departing from the spirit of the present invention.

[0050] In the described embodiment, the second wiring component 17 (or the third wiring component 18) is configured as a rectangle with one less side in its cross-sectional shape, but it can also be configured as follows: Figure 7A As shown, the third wiring component 18 is configured in a U-shape (although not shown, the second wiring component 17 is the same). Additionally, for example... Figure 7B As shown, the third wiring component 18 can also be configured in a roughly V-shape (although not shown, the second wiring component 17 is similar). Additionally, for example... Figure 7C As shown, the third wiring component 18 can also be configured as a rectangle that is longer in the second direction (vertical direction), although not shown.

[0051] Furthermore, in the aforementioned embodiment, five solar cell strings constituting a solar cell module are arranged at predetermined intervals in the second direction, and the connecting portions at both ends of each solar cell string are connected to the wiring components of the first sheet 13 and the second sheet 14, forming one unit. However, any number of solar cell strings, such as three, four, or six or more, can also be arranged at predetermined intervals in the second direction. For example, Figure 8A The diagram shows a structure on a first sheet 13 with two first wiring components 16 and four third wiring components 18, capable of connecting 10 solar cell strings. Specifically, the first wiring component 16, the third wiring component 18, the third wiring component 18, the first wiring component 16, the third wiring component 18, and the third wiring component 18 are arranged sequentially from the bottom to the top of the first sheet 13. All of these wiring components 16 and 18 are made of copper foil. Furthermore, although not shown, the second sheet 14 is positioned relative to... Figure 8A The first sheet 13 is arranged in a 180-degree point symmetrical state in the solar cell module. Figure 8B The diagram shows the state in which the negative-side wiring 15 (shaded with a diagonal line) made of solder-plated copper wire is connected to the first wiring components 16, 16 located above and below. Additionally, Figure 8C The diagram shows a connection portion 16A that electrically connects one end of the upper and lower first wiring components 16, 16 to each other. The first wiring components 16, 16, the connection portion 16A, and the four third wiring components 18 are made of copper foil. Furthermore, although not shown, the second sheet 14 is positioned relative to... Figure 8C The first sheet 13 is arranged in a 180-degree symmetrical configuration within the solar cell module. Furthermore, with... Figure 8A same, Figure 8B The diagram shows the state in which the negative side wiring 15 (shaded with a diagonal line) made of solder-plated copper wire is connected within the range of the first wiring components 16, 16 located above and below.

[0052] in addition, Figure 9A The text shows that no formation was observed. Figure 8C The state shown is that of the first wiring components 16, 16, and the connecting portion 16A located at the top and bottom (indicated by double-dotted lines). That is, it is a state in which only four third wiring components 18 made of copper foil are formed. Furthermore, Figure 9BIn the first sheet 13, the first wiring components 16, 16, the connecting portion 16A, and the negative side circuit 15 are formed of copper wire plated with solder (the part is shaded by a diagonal line). Additionally, on the second sheet 14, four second wiring components 17 and four fourth wiring components 19, 19, also made of copper foil, are formed, along with a connecting portion 19A connecting one end of the fourth wiring components 19, 19 to each other. The fourth wiring components 19, 19, the connecting portion 19A, and the positive side circuit 20 are formed of copper wire plated with solder (the part is shaded by a diagonal line). Furthermore, Figure 9B The diagram shows the state in which the first ends of the 10 solar cell strings 4 are connected to the first wiring component 16 and the third wiring component 18 on the first sheet 13, and the second ends of the 10 solar cell strings 4 are connected to the second wiring component 17 and the fourth wiring component 19 on the second sheet 14. Figure 9B The shaded area is formed by solder-plated copper wires. Thus, by... Figure 8B , Figure 9B The shaded area shown is formed by solder-plated copper wire, which reduces resistance compared to copper foil, thereby allowing a larger current to flow for current collection.

[0053] In addition, in the above embodiment, the solar cell string 4 is formed by shingling multiple solar cell units, but the solar cell string 4 can also be formed by other connection methods, including general connection methods.

[0054] In addition, in the above embodiment, the second direction is defined as the direction orthogonal to the first direction, but it can also be a direction that intersects at an angle other than a right angle.

[0055] The structure and function of the aforementioned embodiment are summarized as follows. The solar cell module of the aforementioned embodiment includes: at least three solar cell strings 41-43, each solar cell string 41-43 being configured such that multiple solar cell units are electrically connected in parallel along a first direction, each string having a first end and a second end along the first direction, and arranged spatially apart from each other along a second direction intersecting the first direction, with a light-receiving surface on its surface side; a first transparent plate 6 disposed on the surface side having the light-receiving surface; and a second transparent plate 11 disposed on the back side opposite to the surface side. The at least three solar cell strings 41-43 each have electrically connectable connection portions 4A and 4B at their first and second ends, and wiring components 16-18 are respectively provided at their first and second ends. 6-18 provide electrical connections between the connection portions at the first end of each of at least two of the at least three solar cell strings 41-43 and between the connection portions 4A and 4B at the second end. The solar cell module has a first sheet 13 and a second sheet 14. The first sheet 13 is configured such that the wiring components 16 and 18 at each of the first ends are in a predetermined position relative to the wiring components 17 at the second ends corresponding to the first ends. The second sheet 14 is configured such that the wiring components 17 at each of the second ends are in a predetermined position relative to the wiring components 16 and 18 at the first ends corresponding to the second ends.

[0056] According to this structure, at least two solar cell strings can be configured in a predetermined posture simply by connecting the connecting portions 4A and 4B of the first and second ends of at least two of the at least three solar cell strings 41 to 43 to the wiring components 16 to 18 which are arranged in a predetermined position on the first sheet 13 and the second sheet 14. Therefore, the operation of aligning the edges of multiple solar cell strings in predetermined positions can be omitted, as can the operation of connecting the ends of adjacent solar cell strings to each other via wiring pairs.

[0057] It can also be configured such that the solar cell strings 41 to 43 are formed by shingling the plurality of solar cell units.

[0058] As mentioned above, the solar cell units can be electrically connected to each other simply by shingling multiple solar cell units, thus making it easy to form solar cell strings.

[0059] The wiring components 16-18 may also have connecting portions 17A and 18A extending along the first direction, respectively.

[0060] With the above structure, by simply aligning the facing edges of the connecting portions 4A and 4B of the solar cell unit strings 41 to 43 with the connecting portions 17A and 18A extending in the first direction, the solar cell unit strings 41 to 43 and the wiring components 16 to 18 can be connected in an aligned state.

[0061] It can also be configured such that the width of the connecting portions 17A and 18A in the second direction is approximately the same as the width of the connecting portions 4A and 4B in the second direction of each solar cell unit string 41 to 43.

[0062] With the above structure, the solar cell strings 41-43 can be connected to the wiring components 16-18 in an aligned state simply by connecting the connecting parts 4A and 4B of the solar cell strings 41-43 to the connecting parts 17A and 18A in the same state.

[0063] According to the above embodiment, by simply connecting the connecting portions 4A and 4B at both ends of at least two solar cell strings to the wiring components 16-18 located in a predetermined position on the first sheet 13 and the second sheet 14, at least two solar cell strings can be configured in a predetermined posture. This provides a solar cell module that can be easily assembled.

[0064] [Explanation of the labels in the attached diagram]

[0065] 2…Frame component, 3…Glass building material, 4…Solar cell string, 4A, 4B…Connecting parts, 5…Space, 6…High transmittance (float) unreinforced glass (first transparent plate), 7…First sealing component, 11…High transmittance (float) unreinforced glass (second transparent plate), 12…Second sealing component, 13…Wiring sheet (first sheet), 14…Wiring sheet (second sheet), 15…Negative side wiring, 16…First wiring component, 16A…Connecting part, 17…Second wiring component, 18…Third wiring component, 19…Fourth… Wiring components, 19A…connector, 17A, 18A…connection parts, 17B, 18B…connection parts, 20…positive side wiring, 21…wiring shielding component, 22…solar cell, 23…bus electrode, 24…back bus electrode, 25…conductive component, 26…semiconductor substrate, 27…finger wire, 41…first solar cell string, 42…second solar cell string, 43…third solar cell string, D…bypass diode, H…power output line, T1…negative side terminal box, T2…positive side terminal box

Claims

1. A solar cell module, characterized in that, have: At least three solar cell unit strings, each solar cell unit string being configured to electrically connect multiple solar cell units arranged side by side in a first direction, having a first end and a second end along the first direction, and being spatially spaced apart from each other along a second direction intersecting the first direction in such a way that a light-receiving surface is provided on the surface side; A first transparent plate disposed on the surface side having the light-receiving surface; A second transparent plate is disposed on the back side opposite to the surface side. The at least three solar cell strings each have electrically connected connection portions at the first end and the second end. The first and second ends each have wiring components that electrically connect the connection portions at the first end and the connection portions at the second end of at least two of the at least three solar cell strings. The solar cell module has: The first sheet is configured such that the wiring components of the first end are in a predetermined position relative to the wiring components of the second end corresponding to the first end; The second sheet is configured such that the wiring components at the second end are in a predetermined position relative to the wiring components at the first end corresponding to the second end. The first sheet has a first wiring component connected to the negative electrode side circuit of the solar cell module, and a plurality of third wiring components connected to the connecting portion. The second sheet has a plurality of second wiring components connected to the connecting portion, and a fourth wiring component connected to the positive electrode side circuit of the solar cell module. The first sheet and the second sheet have the same structure and are configured as a rectangle that is longer in the second direction. The specified positional relationship refers to the positional relationship in which the first wiring component is opposite to the lower connecting portion of the second wiring component in the second sheet when the second direction is vertical, or the positional relationship in the second direction is consistent. Similarly, it refers to the positional relationship in which the fourth wiring component is opposite to the upper connecting portion of the third wiring component in the first sheet when the second direction is vertical, or the positional relationship in the second direction is consistent.

2. The solar cell module according to claim 1, characterized in that, The solar cell strings are formed by shingling the multiple solar cell units together.

3. The solar cell module according to claim 1 or 2, characterized in that, The wiring components each have a connecting portion extending in the first direction.

4. The solar cell module according to claim 3, characterized in that, The width of the connecting portion in the second direction is configured to be the same as the width of the connecting portion in the second direction of each solar cell string.

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