Solar power generation system

Abstract

This invention relates to a solar power generation system capable of suppressing costs. Embodiment 1 of the solar power generation system includes a solar cell module, a wiring box, and a conversion box. The solar cell module has battery connection terminals serving as positive and negative terminals, and battery connection terminals serving as terminals for three or more connecting wires. The wiring box has multiple wiring connectors and internal wiring. The multiple wiring connectors include wiring box connection terminals that can connect to the battery connection terminals and wiring box connection terminals that can connect to the battery connection terminals. The internal wiring can form a circuit combining series and parallel connections of the solar cell modules. The conversion box has conversion box connection terminals that can connect to the battery connection terminals and cable connectors that can connect to a power conversion device.

Description

Technical Field

[0001] The embodiments of the present invention relate to a solar power generation system. Background Technology

[0002] A solar power generation system consists of a circuit that connects multiple solar cell modules in series and parallel, connected to a power conversion device (power conditioner). The circuit of a solar power generation system is constructed by connecting multiple solar cell modules via DC cables. Special DC cables are used to connect multiple solar cell modules in parallel. DC cables are also used in the connection between the circuit and the power conversion device. The goal is to reduce the cost of the solar power generation system.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2004-214475 Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a solar power generation system that can suppress costs.

[0005] The solar power generation system of embodiment 1 includes a solar cell module, a wiring box, and a conversion box. The solar cell module has battery connection terminals serving as positive and negative terminals, and battery connection terminals serving as terminals for three or more connecting wires. The wiring box has multiple wiring connectors and internal wiring. The multiple wiring connectors include wiring box connection terminals that can connect to the battery connection terminals and wiring box connection terminals that can connect to the battery connection terminals. The internal wiring can form a circuit combining series and parallel connections of the solar cell modules. The conversion box has conversion box connection terminals that can connect to the battery connection terminals and cable connectors that can connect to a power conversion device.

[0006] Embodiment 2 is based on the solar power generation system described in Embodiment 1. The solar power generation system can increase the number of combinations of solar cell modules and wiring boxes. The solar power generation system can replace one solar cell module with multiple interconnected solar cell modules. The solar power generation system can increase the number of solar cell modules connected to the wiring box terminals via a conversion box.

[0007] Embodiment 3 is based on the solar power generation system described in Embodiment 1 or 2. The conversion box has a housing and three conversion connectors. The housing is quadrilateral in top view. The three conversion connectors have conversion box connection terminals and conversion box connection terminals that can be connected to the battery connection terminals. The three conversion connectors are arranged on three of the four sides of the housing, and a cable connector is arranged on one side.

[0008] The solar power generation system of embodiment 4 includes a solar cell module, a wiring box, and a conversion box. The solar cell module has battery connection terminals that serve as positive and negative terminals, and battery connection terminals that serve as connection wiring terminals not connected to the positive and negative terminals. The wiring box has multiple wiring connectors and internal wiring. The multiple wiring connectors include wiring box connection terminals that can connect to the battery connection terminals and wiring box connection terminals that can connect to the battery connection terminals. The internal wiring can form a circuit combining series and parallel connections of the solar cell modules. The conversion box is connected to the solar cell module or the wiring box and has cable connectors that can connect to a power conversion device. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a solar cell module.

[0010] Figure 2 This is a schematic diagram of a modified solar cell module.

[0011] Figure 3 This is a floor plan of the wiring box.

[0012] Figure 4 It is a 3D view showing the wiring box with the top cover removed.

[0013] Figure 5 yes Figure 3 A cross-sectional view of the VV line.

[0014] Figure 6 This is the layout diagram of the first circuit.

[0015] Figure 7 This is the circuit diagram of the first circuit.

[0016] Figure 8 This is an illustration of the conduction path of the first circuit.

[0017] Figure 9 This is a schematic diagram of the wiring box for the first circuit.

[0018] Figure 10 This is a configuration diagram of the solar cell module and wiring box for the first circuit.

[0019] Figure 11 This is the first explanatory diagram of the conduction path of the wiring box of the first circuit.

[0020] Figure 12 This is a second explanatory diagram of the conduction path of the wiring box in the first circuit.

[0021] Figure 13 This is a schematic diagram of a modified example of the wiring box for the first circuit.

[0022] Figure 14 This is a first explanatory diagram of the conduction path of a modified example of the wiring box of the first circuit.

[0023] Figure 15 This is a second explanatory diagram of the conduction path of a modified example of the wiring box of the first circuit.

[0024] Figure 16 This is the layout diagram of the second circuit.

[0025] Figure 17 This is the circuit diagram for the second circuit.

[0026] Figure 18 This is an illustration of the conduction path of the second circuit.

[0027] Figure 19 This is a schematic diagram of the wiring box for the second circuit.

[0028] Figure 20 This is a configuration diagram of the solar cell module and wiring box for the second circuit.

[0029] Figure 21 This is the first explanatory diagram of the conduction path of the wiring box for the second circuit.

[0030] Figure 22 This is a second explanatory diagram of the conduction path of the wiring box for the second circuit.

[0031] Figure 23 This is the third explanatory diagram of the conduction path of the wiring box for the second circuit.

[0032] Figure 24 This is a schematic diagram of a modified example of the wiring box for the second circuit.

[0033] Figure 25 This is a first explanatory diagram of the conduction path of a modified example of the wiring box for the second circuit.

[0034] Figure 26 This is a second explanatory diagram of the conduction path of a modified example of the wiring box for the second circuit.

[0035] Figure 27 This is a third explanatory diagram showing the conduction path of a modified example of the wiring box for the second circuit.

[0036] Figure 28 This is a circuit diagram of the solar power generation system according to the first embodiment.

[0037] Figure 29 This is a plan view of the conversion box.

[0038] Figure 30 This is a schematic diagram of the converter box.

[0039] Figure 31This is a circuit diagram of the second circuit of a solar power generation system, which is a variation of the first embodiment.

[0040] Figure 32 This is a circuit diagram of the second circuit of the solar power generation system according to the second embodiment.

[0041] Figure 33 This is a circuit diagram of the second circuit of a solar power generation system according to a variation of the second embodiment.

[0042] Figure 34 This is a configuration diagram of the constituent elements of the solar power generation system in a variation of the second embodiment.

[0043] Figure 35 This is a wiring diagram showing the series connection of multiple solar cell modules.

[0044] Figure 36 This is an illustration of how the solar power generation system is installed relative to the guardrail.

[0045] Figure 37 This is a schematic diagram of the solar cell module according to the third embodiment.

[0046] Figure 38 This is the layout diagram of the third circuit.

[0047] Figure 39 This is the circuit diagram for the third circuit.

[0048] Figure 40 This is a schematic diagram of the solar cell module of the first variation of the third embodiment.

[0049] Figure 41 This is the circuit diagram for the fourth circuit.

[0050] Figure 42 This is a schematic diagram of the solar cell module according to the fourth embodiment.

[0051] Figure 43 This is the circuit diagram for the sixth circuit.

[0052] Figure 44 This is a schematic diagram of the solar cell module of the first variation of the fourth embodiment.

[0053] Figure 45 This is the circuit diagram for the seventh circuit.

[0054] Explanation of reference numerals in the attached figures A: First wiring connector, B: Second wiring connector, C: Third wiring connector, D: Fourth wiring connector, J: First conversion connector, K: Second conversion connector, L: Third conversion connector, 1, 91, 92, 93: Solar cell module, 21p, 21q: Positive terminal (battery connection terminal), 22p, 22q: Negative terminal (battery connection terminal), 31p, 31q: First connection terminal (battery connection terminal), 32p, 32q: Second connection terminal (battery connection terminal), 33p, 33q: Third connection terminal (battery connection terminal), 21a, 21b: Positive connection terminal 22a, 22b: Negative connection terminal (wiring box connection terminal), 31a, 31b: First connection terminal (wiring box connection terminal), 32a, 32b: Second connection terminal (wiring box connection terminal), 33a, 33b: Third connection terminal (wiring box connection terminal), 40: Wiring box, 40c: Housing, 40w: Internal wiring, 46: Bypass diode (diode), 47: Anti-reverse current diode (diode), 50: First circuit (circuit), 60: Second circuit (circuit), 70: Conversion box, 70c: Housing, 71, 72: Connection terminal (conversion box connection terminal), 76, 77: Connection terminal (conversion box connection terminal), 78: Cable connector, 80: Solar power generation system, 81: Power conversion device. Detailed Implementation

[0055] Hereinafter, the solar power generation system of the embodiment will be described with reference to the accompanying drawings.

[0056] Solar power generation system 80 (reference) Figure 28 It has circuits 50 and 60 including a solar cell module 1 and a wiring box 40, a conversion box 70, and a power conversion device 81.

[0057] Figure 1 This is a schematic diagram of the solar cell module 1. Figure 1 The left side is a floor plan. Figure 1 The right side is a side cross-sectional view at line II. The solar cell module 1 has a base component 2, a cover component 8, and a sealing material 5. The solar cell module 1 has a solar cell element 10, lead wires 11 and 12, connecting wires 21 and 22, connecting wires 31 to 34, and connectors P and Q.

[0058] In this application, the X, Y, and Z directions of the orthogonal coordinate system are defined as follows. The Z direction is the thickness direction of the solar cell element 10. The X direction is the direction in which the connecting wires 21, 22 and the connecting wires 31-34 extend. The Y direction is the direction in which the connecting wires 21, 22 and the connecting wires 31-34 are arranged.

[0059] The base component 2 and the cover component 8 are made of a light-transmitting resin sheet or glass substrate, etc. The base component 2 is disposed on the rear surface side, i.e., the Z side, of the solar cell module 1. The cover component 8 is disposed on the front side, i.e., the +Z side, of the solar cell module 1.

[0060] The sealing material 5 is formed of a resin material or the like that has light transmittance and electrical insulation. The sealing material 5 is disposed between the base component 2 and the cover component 8 in the Z direction. The sealing material 5, together with the solar cell element 10, lead wires 11 and 12, connecting wires 21 and 22, and connecting wires 31 to 34, is formed using semiconductor technology.

[0061] The solar cell element 10 has a semiconductor layer. The semiconductor layer includes perovskite semiconductor, transmissive cuprous oxide (Cu2O) semiconductor, silicon, etc. The perovskite semiconductor contains a perovskite structure in at least a portion. The perovskite structure is one of the crystal structures and is the same crystal structure as perovskite. Typically, the perovskite structure is composed of ions A, B, and X, and is represented by the following general formula (1).

[0062] ABX3……(1) As A, primary ammonium ions can be utilized. Specifically, CH3NH3 can be used as an example. + C2H5NH3 + C3H7NH3 + C4H9NH3 + and HC(NH2)2 + etc., preferably CH3NH3 + However, it is not limited to this. Additionally, A also prefers Cs. + 、Rb + 1,1,1-trifluoroethylammonium iodide (FEAI), but not limited to these. As B, Pb2 can be utilized. + or Sn2 + Metal ions with a divalent oxidation state can be used, but are not limited to these. As X, Cl can be utilized. - B - or I - Isohalide ions. The materials constituting ions A, B, or X can be single or mixed. The ions formed can function even if they do not necessarily have the same stoichiometric ratio as ABX3.

[0063] The solar cell element 10 has a positive electrode 10p and a negative electrode 10n. The positive electrode 10p and the negative electrode 10n are disposed at the ends of the solar cell element 10 in the Y direction. The positive electrode 10p is disposed at the end of the solar cell element 10 on the +Y side, and the negative electrode 10n is disposed at the end of the solar cell element 10 on the -Y side. The positive electrode 10p and the negative electrode 10n are integrally formed in the X direction of the solar cell element 10.

[0064] Lead-out wiring 11, 12, connecting wiring 21, 22 and connecting wiring 31~34 are formed of conductive metal materials such as aluminum (Al) and copper (Cu).

[0065] Connecting wires 21 and 22 extend in the X direction. Connecting wires 21 and 22 are positive and negative connection wires 21 and 22, respectively. Positive and negative connection wires 21 and 22 are arranged in the Y direction. Positive connection wire 21 is located on the +Y side, and negative connection wire 22 is located on the -Y side. Connecting wires 21 and 22 are located on the +Y side of the solar cell element 10. Connecting wires 21 and 22 are also located on the -Z side of the solar cell element 10.

[0066] Lead-out wires 11 and 12 are positive lead-out wire 11 and negative lead-out wire 12, respectively. Positive lead-out wire 11 extends from the X-direction end of positive electrode 10p towards the +Y and -Z sides, and connects to positive connection wire 21. Negative lead-out wire 12 extends from the X-direction end of negative electrode 10n towards the -Z and +Y sides, and connects to negative connection wire 22.

[0067] The solar cell module 1 has a bypass diode 26. The bypass diode 26 is formed by crossing the positive connection wire 21 and the negative connection wire 22. In the event of a fault in the solar cell element 10, the bypass diode 26 allows current to flow around the solar cell element 10. The bypass diode 26 may also be formed by crossing the positive lead wire 11 and the negative lead wire 12. The solar cell module 1 may also have a fuse or a reverse current protection diode 27 (hereinafter referred to as fuse 27). The fuse 27 is formed in the connection wires 21, 22 or the lead wires 11, 12. The fuse 27 cuts off the wiring when a large current flows through it.

[0068] Connecting wires 31-34 extend along the X direction. There are three or more connecting wires 31-34, for example, four. Connecting wires 31-34 are the first connecting wire 31, the second connecting wire 32, the third connecting wire 33, and the fourth connecting wire 34. Connecting wires 31-34 are arranged in the Y direction. The first connecting wire 31, the second connecting wire 32, the third connecting wire 33, and the fourth connecting wire 34 are arranged sequentially from the -Y side to the +Y side. Connecting wires 31-34 are located on the +Y side of connecting wires 21 and 22. Connecting wires 31-34 are located on the -Z side of the solar cell element 10.

[0069] Connectors P and Q are disposed in multiple locations, for example, in two locations. Connector P is disposed at the end of the solar cell module 1 on the -X side, and connector Q is disposed at the end of the solar cell module 1 on the +X side. Connectors P and Q are disposed at the front end of the flexible substrate 16. The flexible substrate 16 extends outward in the X direction from the base member 2, the sealing material 5, and the cover member 8. Connecting wires 21, 22 and connecting wires 31-34 pass through the flexible substrate 16 and extend to connectors P and Q. Connectors P and Q connect connecting wires 21, 22 and connecting wires 31-34 to the outside. Connector P has connecting terminals (battery connecting terminals) on the -X side of connecting wires 21, 22 and connecting terminals (battery connecting terminals) on the -X side of connecting wires 31-34. Connector Q has connecting terminals (battery connecting terminals) on the +X side of connecting wires 21, 22 and connecting terminals (battery connecting terminals) on the +X side of connecting wires 31-34.

[0070] Figure 2 This is a schematic diagram of a modified example of solar cell module 1. Figure 2 The left side is a floor plan. Figure 2 The right side is a side cross-sectional view at line II-II. In the modified example, connecting wires 31-34 are arranged to overlap with the solar cell element 10 when viewed from the Z direction. Connecting wires 31-34 are located in the middle of the solar cell element 10 in the Y direction. Connecting wires 21 and 22 are also similarly located in the middle of the solar cell element 10 in the Y direction. Connecting wires 21 and 22 and lead wires 11 and 12 are formed separately on both sides of the solar cell element 10 in the X direction. Connecting wires 21 and 22 may also be formed continuously in the X direction.

[0071] In a variation of the solar cell module 1, the connecting wires 31-34 and / or the connecting wires 21, 22 are arranged to overlap with the solar cell element 10 when viewed from the Z direction. The connecting wires 31-34 and / or the connecting wires 21, 22 are located at the middle portion of the solar cell element 10 in the Y direction. As a result, the solar cell module 1 is miniaturized in the Y direction.

[0072] Figure 3 This is a plan view of wiring box 40. Figure 4 This is a 3D view showing the wiring box 40 with its top cover 42 removed. Figure 5 yes Figure 3 The cross-sectional view at the VV line. The wiring box 40 connects multiple solar cell modules 1 in series and in parallel to form a circuit. The wiring box 40 has a housing 40c, an upper substrate 44, a lower substrate 45, and multiple wiring connectors A~D.

[0073] The housing 40c is formed of a resin material or the like. The housing 40c is quadrilateral in shape when viewed from above, for example, a square. The housing 40c has a housing body 41 and a top cover 42.

[0074] The main body 41 is formed in the shape of a rectangular box. The main body 41 has an opening at its upper side. The main body 41 has a pair of mounting plates 41f. The pair of mounting plates 41f are disposed at the bottom of the main body 41. The pair of mounting plates 41f are disposed on the outer sides of the ends of one of the two diagonals of the housing 40c, which is quadrilateral in top view.

[0075] The top cover 42 is plate-shaped. The top cover 42 blocks the opening on the upper side of the housing body 41. The top cover 42 is fixed to the housing body 41 by fastening components such as screws. The fastening components are located at the four corners of the housing 40c, which is quadrilateral in top view. The top cover 42 has a pair of mounting plates 42f. The pair of mounting plates 42f are located on the outer sides of the other end of one of the two diagonals of the quadrilateral housing 40c in top view.

[0076] The housing 40c is secured to the outside by fasteners such as screws at the positions of a pair of mounting plates 41f and a pair of mounting plates 42f. When viewed from above, the pair of mounting plates 41f and 42f do not overlap. This facilitates the handling of tools used for installing the fasteners.

[0077] The upper substrate 44 and the lower substrate 45 are formed of a resin material or the like. When viewed from above, the upper substrate 44 and the lower substrate 45 are quadrilateral in shape, for example, square. The upper substrate 44 and the lower substrate 45 are housed inside the housing 40c and are arranged separately, one above the other. The upper substrate 44 is disposed on the upper side, and the lower substrate 45 is disposed on the lower side.

[0078] The wiring box 40 has internal wiring 40w. The internal wiring 40w can form the circuitry of a solar power generation system. The internal wiring 40w includes a wiring pattern. The wiring pattern is formed from conductive metal materials such as copper (Cu) and aluminum (Al). The internal wiring 40w may also include diodes 46 and 47. Diodes 46 and 47 are bypass diodes 46 and / or anti-reverse current diodes 47. The internal wiring 40w is formed on the upper surface of the upper substrate 44 and the lower substrate 45. When the internal wiring 40w of the wiring box 40 includes diodes 46 and 47, the diodes 26 and 27 of the solar cell module 1 may be omitted.

[0079] Multiple wiring connectors A to D, for example, four wiring connectors A to D. The four wiring connectors A to D are arranged on the four sides of the housing 40c. The four wiring connectors A to D are first wiring connector A, second wiring connector B, third wiring connector C, and fourth wiring connector D. First wiring connector A and third wiring connector C are arranged on opposite sides of each other. Second wiring connector B and fourth wiring connector D are arranged on opposite sides of each other.

[0080] A first wiring connector A is configured to span both the interior and exterior of the housing 40c. Inside the housing 40c, the first wiring connector A connects to the internal wiring 40w. Outside the housing 40c, the first wiring connector A connects to the solar cell module 1 via a first intermediate cable 95 (described later). The first wiring connector A has an upper connecting portion Au and a lower connecting portion Ad. The upper connecting portion Au is located on the upper side, and the lower connecting portion Ad is located on the lower side. The second wiring connector B, the third wiring connector C, and the fourth wiring connector D are formed in the same manner as the first wiring connector A.

[0081] The upper and lower connecting parts have more than 5 horizontal joints (in Figure 4 (In this example, there are 8) connecting parts. As described below, the upper connecting parts of wiring connectors A to D have two connecting terminals (wiring box connecting terminals) and / or three or more connecting terminals (wiring box connecting terminals). The lower connecting parts of wiring connectors A to D have three or more connecting terminals. Two connecting terminals can be connected to the positive and negative connecting terminals (battery connecting terminals) of the solar cell module 1. Three or more connecting terminals can be connected to three or more connecting terminals (battery connecting terminals) of the solar cell module 1.

[0082] Figure 6 This is a layout diagram of the first circuit 50. The wiring box 40 is used to construct the first circuit 50. The solar cell modules 91-93 of the first circuit 50 are the same as those of the aforementioned solar cell module 1. The first circuit 50 is a circuit formed by connecting the first unit α and the second unit β in parallel. The first unit α and the second unit β are units formed by connecting three solar cell modules 91-93 in series.

[0083] Figure 7This is a circuit diagram of the first circuit 50. The first unit α and the second unit β are sequentially arranged from the -R side to the +R side. Each unit α and β is formed by alternately connecting solar cell modules 91-93 and wiring box 40. The wiring box 40, as internal wiring 40w, includes three wiring patterns: a first wiring pattern 51, a second wiring pattern 52, and a third wiring pattern 53. The first wiring pattern 51 connects to the +R side of the solar cell module 91 located at the end of the unit on the -R side. The second wiring pattern 52 connects to the +R side of the solar cell module 92 located in the middle of the R direction within the unit. The third wiring pattern 53 connects to the +R side of the solar cell module 93 located at the end of the unit on the +R side.

[0084] The first wiring pattern 51 is configured as follows: The positive terminal 21a on the -R side is connected to the first connection terminal 31b on the +R side. The second connection terminal 32a on the -R side is connected to the second connection terminal 32b on the +R side. The third connection terminal 33a on the -R side and the third connection terminal 33b on the +R side are connected via wiring 33c. The negative terminal 22a on the -R side is connected to wiring 33c. The negative terminal 22a on the -R side is connected to the anode side of the bypass diode 46. The positive terminal 21a on the +R side is connected to the cathode side of the bypass diode 46. Other terminals are terminated.

[0085] The second wiring pattern 52 is configured as follows: The negative terminal 22a on the -R side is connected to the first connection terminal 31a on the -R side. The positive terminal 21a on the -R side is connected to the first connection terminal 31b on the +R side. The second connection terminal 32a on the -R side is connected to the second connection terminal 32b on the +R side. The third connection terminal 33a on the -R side is connected to the third connection terminal 33b on the +R side. The negative terminal 22a on the -R side is connected to the anode side of the bypass diode 46. The positive terminal 21a on the +R side is connected to the cathode side of the bypass diode 46. Other terminals are terminated.

[0086] The third wiring pattern 53 is configured as follows: The negative terminal 22a on the -R side is connected to the first connection terminal 31a on the -R side. The second connection terminal 32a on the -R side and the second connection terminal 32b on the +R side are connected via wiring 32c. The positive terminal 21a on the -R side is connected to wiring 32c via the anti-reverse current diode 47. The third connection terminal 33a on the -R side is connected to the third connection terminal 33b on the +R side. The negative terminal 22a on the -R side is connected to the anode side of the bypass diode 46. The positive terminal 21a on the +R side is connected to the cathode side of the bypass diode 46. Other terminals are terminated.

[0087] The first unit α and the second unit β are constructed in the same way. The second unit β is connected to the +R side of the first unit α.

[0088] The positive output terminal 50p and negative output terminal 50n of the first circuit 50 are disposed at the end of the solar cell module 91 disposed on the -R side of the first unit α. The connection terminal on the -R side of the second connection wiring 32 of the solar cell module 91 becomes the positive output terminal 50p of the first circuit 50. The connection terminal on the -R side of the third connection wiring 33 of the solar cell module 91 becomes the negative output terminal 50n of the first circuit 50.

[0089] Figure 8 This is an illustration of the conduction path of the first circuit 50. Figure 8 In the diagram, the conduction path of the first circuit 50 is represented by a thick dashed line. Figure 7 Formed in the first circuit 50 shown Figure 8 The conductive path is shown. Thus, the following is achieved: Figure 6 The layout of the first circuit 50 is shown.

[0090] exist Figure 7 In the first circuit 50 shown, by adding a solar cell module 92 together with the second wiring pattern 52 in the middle of the R direction within each unit α and β, the number of solar cell modules 92 connected in series within each unit α and β is increased. In the first circuit 50, by adding other units on the +R side of the second unit β, the number of units connected in parallel is increased. Thus, in the first circuit 50, the number of solar cell modules connected in series and in parallel can be freely adjusted.

[0091] The first circuit 50 utilizes only three of the four connecting wires 31-34 (connecting wires 31-33). In the first circuit 50, multiple solar cell modules are connected in series and in parallel without using external DC cables. Therefore, the cost of the solar power generation system can be reduced.

[0092] Figure 9 This is a schematic diagram of the wiring box 40 of the first circuit 50. Figure 9 The left side is the upper surface of the upper substrate 44, and the right side is the upper surface of the lower substrate 45. Figure 9 In this design, four wiring connectors A to D are described in four directions on the upper substrate 44 and the lower substrate 45. Regarding the fourth wiring connector D, the upper connecting portion Du is described on the side away from the upper substrate 44 and the lower substrate 45, and the lower connecting portion Dd is described on the side closer to the upper substrate 44 and the lower substrate 45. The upper and lower connecting portions of the first wiring connector A, the second wiring connector B, and the third wiring connector C are described in the same manner as the upper connecting portion Du and the lower connecting portion Dd of the fourth wiring connector D.

[0093] A first wiring pattern 51, a second wiring pattern 52, and a third wiring pattern 53 are formed on an upper substrate 44 and a lower substrate 45. The main part of each wiring pattern 51 to 53 is formed on the upper substrate 44, and the remaining part is formed on the lower substrate 45.

[0094] The first wiring pattern 51 of the upper substrate 44 is connected to the upper connecting portion Au of the first wiring connector A. The upper connecting portion Au of the first wiring connector A includes... Figure 7 The first wiring pattern 51 shown has a negative connection terminal 22a and a positive connection terminal 21a on the -R side, as well as a second connection terminal 32a and a third connection terminal 33a. The first wiring pattern 51 of the upper substrate 44 and the first wiring pattern 51 of the lower substrate 45 are connected by wirings 32c to 34c. The first wiring pattern 51 of the lower substrate 45 is connected to the lower connecting portion Cd of the third wiring connector C. The lower connecting portion Cd of the third wiring connector C includes... Figure 7 The first connection terminal 31b, the second connection terminal 32b, and the third connection terminal 33b on the +R side of the first wiring pattern 51 shown.

[0095] The second wiring pattern 52 of the upper substrate 44 is connected to the upper connecting portion Du of the fourth wiring connector D. The upper connecting portion Du of the fourth wiring connector D includes... Figure 7 The second wiring pattern 52 shown has a negative connection terminal 22a and a positive connection terminal 21a on the -R side, as well as a first connection terminal 31a, a second connection terminal 32a, and a third connection terminal 33a. The second wiring pattern 52 of the upper substrate 44 and the second wiring pattern 52 of the lower substrate 45 are connected by wirings 32c to 34c. The second wiring pattern 52 of the lower substrate 45 is connected to the lower connecting portion Bd of the second wiring connector B. The lower connecting portion Bd of the second wiring connector B includes... Figure 7 The first connection terminal 31b, the second connection terminal 32b, and the third connection terminal 33b on the +R side of the second wiring pattern 52 shown.

[0096] The third wiring pattern 53 of the upper substrate 44 is connected to the upper connecting portion Bu of the second wiring connector B. The upper connecting portion Bu of the second wiring connector B includes... Figure 7 The third wiring pattern 53 shown has a negative connection terminal 22a and a positive connection terminal 21a on the -R side, as well as a first connection terminal 31a, a second connection terminal 32a, and a third connection terminal 33a. The third wiring pattern 53 of the upper substrate 44 and the third wiring pattern 53 of the lower substrate 45 are connected by wirings 32c and 33c. The third wiring pattern 53 of the lower substrate 45 is connected to the lower connecting portion Dd of the fourth wiring connector D. The lower connecting portion Dd of the fourth wiring connector D includes... Figure 7The second connection terminal 32b and the third connection terminal 33b on the +R side of the second wiring pattern 52 shown.

[0097] Figure 10 This is a configuration diagram of the solar cell modules 91-93 and the wiring box 40 of the first circuit 50. Figure 7 The wiring patterns 51-53 of the first circuit 50 shown are obtained through... Figure 10 The wiring box 40 shown is implemented by selecting wiring connectors A to D. The first wiring pattern 51 is implemented by connecting the first wiring connector A to the solar cell module 91 on the -R side and the third wiring connector C to the solar cell module 92 on the +R side. The second wiring pattern 52 is implemented by connecting the fourth wiring connector D to the solar cell module 92 on the -R side and the second wiring connector B to the solar cell module 93 on the +R side. The third wiring pattern 53 is implemented by connecting the second wiring connector B to the solar cell module 93 on the -R side and the fourth wiring connector D to the solar cell module 91 on the +R side. The wiring pattern 53 at the +R side end of the first circuit 50 can be implemented even without connecting the fourth wiring connector D to other solar cell modules.

[0098] Figure 11 This is a first explanatory diagram of the conduction path of the wiring box 40 of the first circuit 50. Figure 12 This is a second explanatory diagram of the conduction path of the wiring box 40 of the first circuit 50. The first circuit 50, through... Figure 11 The top, middle, and bottom images, and Figure 12 The top, middle, and bottom images are connected sequentially to form the image. Figure 11 , 12 In the diagram, the conductive path is represented by a thick dashed line.

[0099] Connector P of solar cell modules 91-93 is located on the -R side, and connector Q is located on the +R side. Connectors P and Q have upper connecting portions Pu and Qu, and lower connecting portions Pd and Qd. Figure 11 and Figure 12 In the connector, upper connecting portions Pu and Qu are shown on the side away from the center in the R direction from the solar cell modules 91-93, and lower connecting portions Pd and Qd are shown on the side closer to the center. The upper connecting portions Pu and Qu, and the lower connecting portions Pd and Qd, have more than five connecting portions in the lateral direction. Connecting terminals 21p and 22p on the -R side and connecting terminals 31p to 33p on the -R side are formed on the connector P. Each terminal of the connector P is located in the upper connecting portion Pu. Connecting terminals 21q and 22q on the +R side and connecting terminals 31q to 33q on the +R side are formed on the connector Q. Each terminal of the connector Q is located in the lower connecting portion Qd.

[0100] A first intermediate cable 95 is disposed between the solar cell modules 91-93 and the wiring box 40. The length of the first intermediate cable 95 in the R direction is set corresponding to the separation distance in the R direction between the solar cell modules 91-93 and the wiring box 40. Similar to the solar cell module 1, two connecting wires (intermediate connecting wires) and three or more connecting wires (intermediate connecting wires) are formed on the first intermediate cable 95.

[0101] The first intermediate cable 95 has intermediate connectors (not shown) at both ends in the R direction. Each intermediate connector has an upper connecting portion and a lower connecting portion. Both the upper and lower connecting portions have more than five connecting portions in the transverse direction. The connecting portions of the intermediate connector are plugs (pins, protrusions). In contrast, the connecting portions of connectors P and Q of the aforementioned solar cell modules 91-93 and the connecting portions of wiring connectors A-D of the wiring box 40 are sockets (holes, recesses).

[0102] The first intermediate cable 95 is connected to the solar cell modules 91-93 on the -R side and the wiring box 40 on the +R side in the following manner: The intermediate connector on the -R side of the first intermediate cable 95 is connected to the connector Q on the +R side of the solar cell modules 91-93 on the -R side. The intermediate connector on the +R side of the first intermediate cable 95 is connected to the wiring connectors A-D on the -R side of the wiring box 40 on the +R side. The first intermediate cable 95 connects the connection terminals and / or connection terminals formed on the lower connecting portion Qd of the connector Q to the connection terminals and / or connection terminals formed on the upper connecting portions Au-Du of the wiring connectors A-D.

[0103] The first intermediate cable 95 is connected to the wiring box 40 on the -R side and the solar cell modules 91-93 on the -R side in the following manner: The intermediate connector on the -R side of the first intermediate cable 95 is connected to the wiring connectors A-D on the +R side of the wiring box 40 on the -R side. The intermediate connector on the +R side of the first intermediate cable 95 is connected to the connector P on the -R side of the solar cell modules 91-93 on the +R side. The first intermediate cable 95 connects the connection terminals and / or connection terminals formed on the lower connecting portions Ad-Dd of the wiring connectors A-D to the connection terminals and / or connection terminals formed on the upper connecting portion Qu of the connector P.

[0104] Thus, the solar cell modules 91-93 and the wiring box 40 are connected via the first intermediate cable 95. In this application, the connection of the solar cell modules 91-93 and the wiring box 40 via the first intermediate cable 95 is sometimes simply referred to as the solar cell modules 91-93 and the wiring box 40 being connected.

[0105] Figure 11In the wiring box 40 shown in the diagram above, the first wiring connector A is connected to the solar cell module 91 on the -R side, and the third wiring connector C is connected to the solar cell module 92 on the +R side. Thus, a pair of solar cell modules 91 and 92 are connected via the first wiring pattern 51 of the wiring box 40.

[0106] Figure 11 In the diagram, the wiring box 40 is configured such that the fourth wiring connector D connects to the solar cell module 92 on the -R side, and the second wiring connector B connects to the solar cell module 93 on the +R side. Thus, a pair of solar cell modules 92 and 93 are connected via the second wiring pattern 52 of the wiring box 40.

[0107] Figure 11 In the wiring box 40 shown in the figure below, the second wiring connector B is connected to the solar cell module 93 on the -R side, and the fourth wiring connector D is connected to the solar cell module 91 on the +R side. Thus, a pair of solar cell modules 93 and 91 are connected via the third wiring pattern 53 of the wiring box 40.

[0108] like Figure 11 As shown, the first unit α of the first circuit 50 is formed by connecting the solar cell modules 91-93 and the wiring box 40.

[0109] about Figure 12 , also with Figure 11 Similarly, solar cell modules 91-93 and wiring box 40 are connected. However, Figure 12 The fourth wiring connector D of the wiring box 40 in the diagram below is not connected to other solar cell modules. This forms the second unit β of the first circuit 50.

[0110] Thus, the first circuit 50 is completed.

[0111] exist Figure 11 , 12 A conductive path, represented by a thick dashed line, is formed in the first circuit 50. This achieves... Figure 8 The conduction path of the first circuit 50 shown is implemented. Figure 6 The layout of the first circuit 50 is shown.

[0112] Figure 13 This is a schematic diagram of a modified example of the wiring box 40 of the first circuit 50. It can also replace... Figure 9 The wiring box 40 shown is used Figure 13 The wiring box 40 in the modified example shown is used to implement this. Figure 7 The first circuit 50 is shown. In the modified wiring box 40, it is also possible to achieve the same result. Figure 10 As shown, select wiring connectors A~D to implement the wiring patterns 51~53 of the first circuit 50.

[0113] exist Figure 9 The wiring box 40 shown contains three bypass diodes 46 corresponding to the solar cell modules 91-93 connected to wiring connectors A-D. In contrast, in... Figure 13 In the modified wiring box 40 shown, only one bypass diode 46 is provided, which is shared by the solar cell modules 91-93 connected to wiring connectors A-D. Regarding... Figure 9 The description of variations of the same points in the wiring box 40 shown is sometimes omitted.

[0114] like Figure 13 As shown in the left figure, the upper connecting portion Au of the first wiring connector A is provided with a negative connection terminal 22a, a positive connection terminal 21a, a third connection terminal 33a, and a second connection terminal 32a. The connection between the terminals of the first wiring connector A and the terminals of the upper substrate 44 is as follows: The negative connection terminal 22a is connected to terminal b. The positive connection terminal 21a is connected to terminal a. The third connection terminal 33a is connected to terminal c. The second connection terminal 32a is connected to terminal d.

[0115] The upper connecting portion Bu of the second wiring connector B is provided with a negative connection terminal 22a, a positive connection terminal 21a, a third connection terminal 33a, a second connection terminal 32a, and a first connection terminal 31a. The connections between the terminals of the second wiring connector B and the terminals of the upper substrate 44 are as follows: The negative connection terminal 22a is connected to terminal m. The positive connection terminal 21a is connected to terminal k. The third connection terminal 33a is connected to terminal n. The second connection terminal 32a is connected to terminal p. The first connection terminal 31a is connected to terminal q.

[0116] A negative connection terminal 22a and a positive connection terminal 21a are provided on the upper connecting portion Cu of the third wiring connector C. The connection between the terminals of the third wiring connector C and the terminals of the upper substrate 44 is as follows: The negative connection terminal 22a is connected to terminal s. The positive connection terminal 21a is connected to terminal r.

[0117] The upper connecting portion Du of the fourth wiring connector D is provided with a negative connection terminal 22a, a positive connection terminal 21a, a third connection terminal 33a, a second connection terminal 32a, and a first connection terminal 31a. The connections between the terminals of the fourth wiring connector D and the terminals of the upper substrate 44 are as follows: The negative connection terminal 22a is connected to terminal f. The positive connection terminal 21a is connected to terminal e. The third connection terminal 33a is connected to terminal g. The second connection terminal 32a is connected to terminal h. The first connection terminal 31a is connected to terminal j.

[0118] In the upper substrate 44, terminal b, which is connected to the negative terminal 22a of each wiring connector A-D, terminal m, terminal s, and terminal f, which are connected to the positive terminal 21a of each wiring connector A-D, are connected to the anode side of the bypass diode 46. Terminals a, k, r, and e are connected to the cathode side of the bypass diode 46. Thus, the solar cell modules 91-93 connected to wiring connectors A-D share a single bypass diode 46.

[0119] like Figure 13 As shown in the right figure, a third connection terminal 33b, a second connection terminal 32b, and a first connection terminal 31b are provided in the lower connecting portion Bd of the second wiring connector B. The connection between the terminals of the second wiring connector B and the terminals of the lower substrate 45 is as follows: The third connection terminal 33b is connected to terminal S. The second connection terminal 32b is connected to terminal E. The first connection terminal 31b is connected to terminal F.

[0120] The lower connecting portion Cd of the third wiring connector C is provided with a third connecting terminal 33b, a second connecting terminal 32b, and a first connecting terminal 31b. The connection between the terminals of the third wiring connector C and the terminals of the lower substrate 45 is as follows: The third connecting terminal 33b is connected to terminal M. The second connecting terminal 32b is connected to terminal N. The first connecting terminal 31b is connected to terminal R.

[0121] A third connection terminal 33b and a second connection terminal 32b are provided on the lower connecting portion Dd of the fourth wiring connector D. The connection between the terminals of the fourth wiring connector D and the terminals of the lower substrate 45 is as follows: The third connection terminal 33b is connected to terminal G. The second connection terminal 32b is connected to terminal H.

[0122] The terminals of the upper substrate 44 and the terminals of the lower substrate 45 are connected by the following wiring: Terminal t is connected to terminal T by wiring tT. Terminal u is connected to terminal U by wiring uU. Terminal v is connected to terminal V by wiring vV. ​​Terminal w is connected to terminal W by wiring wW. Terminal x is connected to terminal X by wiring xX. Terminal y is connected to terminal Y by wiring yY. Terminal z is connected to terminal Z by wiring NZ.

[0123] The following explanation is in Figure 13 The wiring box 40 of the modified example shown has formed Figure 7 The wiring patterns 61-63 are shown below. The following explanations are related to... Figure 7 The wiring patterns 51 to 53 are described in the order described below. In the following description, the connection terminals and connecting terminals corresponding to each terminal of the upper substrate 44 or the lower substrate 45 are shown in parentheses.

[0124] The first wiring pattern 51 is formed between the first wiring connector A and the third wiring connector C as follows: Terminal a (21a) is connected to terminal R (31b) via wiring xX. Terminal d (32a) is connected to terminal N (32b) via wiring wW. Terminal c (33a) is connected to terminal M (33b) via wiring vV. ​​Terminal b (22a) is connected to wiring vV via terminal c.

[0125] The second wiring pattern 52 is formed between the fourth wiring connector D and the second wiring connector B as follows: Terminal f (22a) is connected to terminal j (31a). Terminal e (21a) is connected to terminal F (31b) via wiring xX. Terminal h (32a) is connected to terminal E (32b) via wiring tT. Terminal g (33a) is connected to terminal S (33b) via wiring uU.

[0126] The third wiring pattern 53 is formed between the second wiring connector B and the fourth wiring connector D as follows: Terminal m (22a) is connected to terminal q (31a). Terminal p (32a) is connected to terminal H (32b) via wiring zZ. Terminal k (21a) is connected to wiring zZ via anti-reverse current diode 47. Terminal n (33a) is connected to terminal G (33b) via wiring yY.

[0127] Figure 14 This is a first explanatory diagram of the conduction path of a modified example of the wiring box 40 of the first circuit 50. Figure 15 This is a second explanatory diagram of the conduction path of a modified example of the wiring box 40 of the first circuit 50. Figure 7 The first circuit 50 shown uses... Figure 14 The top, middle, and bottom images, and Figure 15 The top, middle, and bottom images are connected sequentially to form the image. Figure 14 and Figure 15 In the diagram, the conduction path is represented by a thick dashed line.

[0128] Through such Figure 14 The solar cell modules 91-93 and the wiring box 40 of the modified example are connected as shown, thereby forming the first unit α of the first circuit 50. This is achieved by connecting the solar cell modules 91-93 and the wiring box 40 of the modified example as shown. Figure 15 The solar cell modules 91-93 and the wiring box 40 of the modified example are connected as shown, thereby forming the second unit β of the first circuit 50.

[0129] Thus, the first circuit 50 is completed.

[0130] exist Figure 14 and Figure 15 A conductive path, represented by a thick dashed line, is formed in the first circuit 50. This achieves... Figure 8 The conduction path of the first circuit 50 shown is implemented. Figure 6The layout of the first circuit 50 is shown.

[0131] Figure 16 This is a layout diagram of the second circuit 60. The wiring box 40 is used to construct the second circuit 60. The solar cell modules 91 and 92 of the second circuit 60 are the same as those of the aforementioned solar cell module 1. The second circuit 60 is a circuit formed by connecting the first unit α, the second unit β, and the third unit γ in series. The first unit α, the second unit β, and the third unit γ are units formed by connecting two solar cell modules 91 and 92 in parallel.

[0132] Figure 17 This is the circuit diagram of the second circuit 60. The first unit α, the second unit β, and the third unit γ are sequentially arranged from the -R side to the +R side. Each unit α, β, and γ is formed by alternately connecting solar cell modules 91 and 92 and wiring box 40. The wiring box 40, as internal wiring 40w, includes three wiring patterns: a first wiring pattern 61, a second wiring pattern 62, and a third wiring pattern 63. The second wiring pattern 62 is connected to the +R side of the solar cell module 91 located at the -R side end within the first unit α. The first wiring pattern 61 is connected to the +R side of another solar cell module 92 within the first unit α. The solar cell modules 91 and 92 and wiring patterns 61 and 62 located in the second unit β are arranged the same as those in the first unit α. The third wiring pattern 63 is connected to the +R side of the solar cell module 93 located at the -R side end within the third unit γ. The first wiring pattern 61 is connected to the +R side of the solar cell module 92 located at the +R side end within the third unit γ.

[0133] The second wiring pattern 62 is configured as follows: The positive terminal 21a on the -R side is connected to the first connection terminal 31b on the +R side via the anti-reverse current diode 47. The second connection terminal 32a on the -R side is connected to the second connection terminal 32b on the +R side. The third connection terminal 33a on the -R side is connected to the third connection terminal 33b on the +R side via wiring 33c. The negative terminal 22a on the -R side is connected to wiring 33c. The negative terminal 22a on the -R side is connected to the anode side of the bypass diode 46. The positive terminal 21a on the +R side is connected to the cathode side of the bypass diode 46. Other terminals are terminated.

[0134] The first wiring pattern 61 is configured as follows: The negative terminal 22a on the -R side is connected to the third terminal 33a on the -R side. The first terminal 31a on the -R side and the third terminal 33b on the +R side are connected via wiring 34c. The positive terminal 21a on the -R side is connected to wiring 34c via the anti-reverse current diode 47. The second terminal 32a on the -R side is connected to the second terminal 32b on the +R side. The negative terminal 22a on the -R side is connected to the anode side of the bypass diode 46. The positive terminal 21a on the +R side is connected to the cathode side of the bypass diode 46. Other terminals are terminated.

[0135] The third wiring pattern 63 is configured as follows: The second connection terminal 32a on the -R side and the first connection terminal 31b on the +R side are connected via wiring 34c. The positive connection terminal 21a on the -R side is connected to wiring 34c via the anti-reverse current diode 47. The third connection terminal 33a on the -R side and the third connection terminal 33b on the +R side are connected via wiring 33c. The negative connection terminal 22a on the -R side is connected to wiring 33c. The negative connection terminal 22a on the -R side is connected to the anode side of the bypass diode 46. The positive connection terminal 21a on the +R side is connected to the cathode side of the bypass diode 46. Other terminals are terminated.

[0136] The positive output terminal 60p and negative output terminal 60n of the second circuit 60 are disposed at the end of the solar cell module 91 disposed on the -R side of the first unit α. The connection terminal on the -R side of the second connection wiring 32 of the solar cell module 91 becomes the positive output terminal 60p of the second circuit 60. The connection terminal on the -R side of the third connection wiring 33 of the solar cell module 91 becomes the negative output terminal 60n of the second circuit 60.

[0137] Figure 18 This is a diagram illustrating the conduction path of the second circuit 60. Figure 18 In the diagram, the conduction path of the second circuit 60 is represented by a thick dashed line. Figure 17 Formed in the second circuit 60 shown Figure 18 The conductive path is shown. Thus, the following is achieved: Figure 16 The layout of the second circuit 60 is shown.

[0138] exist Figure 17In the second circuit 60 shown, by adding solar cell modules 91 together with the second wiring pattern 62 in the middle of each unit α, β, γ, the number of solar cell modules 91 connected in parallel in each unit α, β, γ is increased. In the second circuit 60, by adding a unit having the same structure as the second unit β between the first unit 2 and the second unit β, the number of units connected in series is increased. Thus, in the second circuit 60, the number of solar cell modules connected in parallel and in series can be freely adjusted.

[0139] The second circuit 60 utilizes only three of the four connecting wires 31-34 from the solar cell modules 91 and 92, namely connecting wires 31-33. In the second circuit 60, multiple solar cell modules are connected in parallel and in series without the use of external DC cables. Therefore, the cost of the solar power generation system can be reduced.

[0140] Figure 19 This is a schematic diagram of the wiring box 40 of the second circuit 60. Figure 19 The left side is the upper surface of the upper substrate 44, and the right side is the upper surface of the lower substrate 45. Figure 19 In the middle, four wiring connectors A~D are described in four directions on the upper substrate 44 and the lower substrate 45.

[0141] A first wiring pattern 61, a second wiring pattern 62, and a third wiring pattern 63 are formed on an upper substrate 44 and a lower substrate 45. The main part of each wiring pattern 61 to 63 is formed on the upper substrate 44, and the remaining part is formed on the lower substrate 45.

[0142] The first wiring pattern 61 of the upper substrate 44 is connected to the upper connecting portion Au of the first wiring connector A. The upper connecting portion Au of the first wiring connector A includes... Figure 17 The first wiring pattern 61 shown has a negative connection terminal 22a and a positive connection terminal 21a on the -R side, as well as a first connection terminal 31a, a second connection terminal 32a, and a third connection terminal 33a. The first wiring pattern 61 of the upper substrate 44 and the first wiring pattern 61 of the lower substrate 45 are connected by wirings 32c and 34c. The first wiring pattern 61 of the lower substrate 45 is connected to the lower connecting portion Cd of the third wiring connector C. The lower connecting portion Cd of the third wiring connector C includes... Figure 17 The second connection terminal 32b and the third connection terminal 33b on the +R side of the first wiring pattern 61 shown.

[0143] The second wiring pattern 62 of the upper substrate 44 is connected to the upper connecting portion Du of the fourth wiring connector D. The upper connecting portion Du of the fourth wiring connector D includes... Figure 17The second wiring pattern 62 shown has a negative connection terminal 22a and a positive connection terminal 21a on the -R side, as well as a second connection terminal 32a and a third connection terminal 33a. The second wiring pattern 62 of the upper substrate 44 and the second wiring pattern 62 of the lower substrate 45 are connected by wiring 31c~33c. The second wiring pattern 62 of the lower substrate 45 is connected to the lower connecting portion Bd of the second wiring connector B. The lower connecting portion Bd of the second wiring connector B includes... Figure 17 The first connection terminal 31b, the second connection terminal 32b, and the third connection terminal 33b on the +R side of the second wiring pattern 62 shown.

[0144] The third wiring pattern 63 of the upper substrate 44 is connected to the upper connecting portion Bu of the second wiring connector B. The upper connecting portion Bu of the second wiring connector B includes... Figure 17 The third wiring pattern 63 shown has a negative connection terminal 22a and a positive connection terminal 21a on the -R side, as well as a second connection terminal 32a and a third connection terminal 33a. The third wiring pattern 63 of the upper substrate 44 and the third wiring pattern 63 of the lower substrate 45 are connected by wirings 33c and 34c. The third wiring pattern 63 of the lower substrate 45 is connected to the lower connection portion Dd of the fourth wiring connector D. The lower connection portion Dd of the fourth wiring connector D includes... Figure 17 The first connection terminal 31b and the third connection terminal 33b on the +R side of the second wiring pattern 62 shown.

[0145] Figure 20 This is a configuration diagram of the solar cell modules 91 and 92 and the wiring box 40 in the second circuit 60. Figure 17 The wiring patterns 61-63 of the second circuit 60 shown are obtained through... Figure 20 The wiring box 40 shown is implemented by selecting wiring connectors A to D. The second wiring pattern 62 is implemented by connecting the fourth wiring connector D to the solar cell module 91 on the -R side and the second wiring connector B to the solar cell module 92 on the +R side. The first wiring pattern 61 is implemented by connecting the first wiring connector A to the solar cell module 92 on the -R side and the third wiring connector C to the solar cell module 91 on the +R side. The third wiring pattern 63 is implemented by connecting the second wiring connector B to the solar cell module 91 on the -R side and the fourth wiring connector D to the solar cell module 92 on the +R side. The wiring pattern 61 at the +R side end of the second circuit 60 can be implemented even without connecting the third wiring connector C to other solar cell modules.

[0146] Figure 21 This is the first explanatory diagram of the conduction path of the wiring box 40 of the second circuit 60. Figure 22 This is the second explanatory diagram. Figure 23This is the third illustration. The second circuit 60... Figure 21 The top and bottom images Figure 22 The top and bottom images and Figure 23 The upper and lower images are connected sequentially to form the image. Figures 21-23 The conduction path is represented by a thick dashed line.

[0147] Figure 21 In the wiring box 40 shown above, the fourth wiring connector D is connected to the solar cell module 91 on the -R side, and the second wiring connector B is connected to the solar cell module 92 on the +R side. Thus, a pair of solar cell modules 91 and 92 are connected via the second wiring pattern 62 of the wiring box 40.

[0148] Figure 21 In the wiring box 40 shown in the figure below, the first wiring connector A is connected to the solar cell module 92 on the -R side, and the third wiring connector C is connected to the solar cell module 91 on the +R side. Thus, a pair of solar cell modules 92 and 91 are connected via the first wiring pattern 61 of the wiring box 40.

[0149] like Figure 21 As shown, the first unit α of the second circuit 60 is formed by connecting the solar cell modules 91 and 92 and the wiring box 40.

[0150] about Figure 22 , also with Figure 21 Similarly, solar cell modules 91 and 92 and wiring box 40 are connected. This forms the second unit β of the second circuit 60.

[0151] Figure 23 In the wiring box 40 shown above, the second wiring connector B is connected to the solar cell module 91 on the -R side, and the fourth wiring connector D is connected to the solar cell module 92 on the +R side. Thus, a pair of solar cell modules 93 and 91 are connected via the third wiring pattern 63 of the wiring box 40.

[0152] about Figure 23 The image below is also related to Figure 21 The diagram below similarly connects solar cell modules 92 and 91 to wiring box 40. However, Figure 23 The third wiring connector C of the wiring box 40 in the diagram below is not connected to other solar cell modules. This forms the third unit γ of the second circuit 60.

[0153] Thus, the second circuit 60 is completed.

[0154] exist Figures 21-23 A conductive path, represented by a thick dashed line, is formed in the second circuit 60. This achieves... Figure 18 The conduction path of the second circuit 60 shown is implemented. Figure 16 The layout of the second circuit 60 is shown.

[0155] Figure 24 This is a schematic diagram of a modified example of the wiring box 40 of the second circuit 60. It can also replace... Figure 19 The wiring box 40 shown is used Figure 24 The wiring box 40 in the modified example shown is used to implement this. Figure 17 The second circuit 60 is shown. In the modified wiring box 40, it is also possible to... Figure 20 As shown, select wiring connectors A~D to implement the wiring patterns 61~63 of the second circuit 60.

[0156] exist Figure 19 The wiring box 40 shown contains three bypass diodes 46 and three anti-reverse current diodes 47 corresponding to the solar cell modules 91 and 92 connected to wiring connectors A-D. In contrast, in... Figure 24 In the modified wiring box 40 shown, only one bypass diode 46 and one anti-reverse current diode 47 are provided, which are shared by the solar cell modules 91 and 92 connected to wiring connectors A-D. Regarding... Figure 19 The description of variations of the same points in the wiring box 40 shown is sometimes omitted.

[0157] like Figure 24 As shown in the left figure, the upper connecting portion Au of the first wiring connector A is provided with a negative connection terminal 22a, a positive connection terminal 21a, a third connection terminal 33a, a second connection terminal 32a, and a first connection terminal 31a. The connections between the terminals of the first wiring connector A and the terminals of the upper substrate 44 are as follows: The negative connection terminal 22a is connected to terminal b. The positive connection terminal 21a is connected to terminal a. The third connection terminal 33a is connected to terminal c. The second connection terminal 32a is connected to terminal d. The first connection terminal 31a is connected to terminal e.

[0158] The upper connecting portion Bu of the second wiring connector B is provided with a negative connection terminal 22a, a positive connection terminal 21a, a third connection terminal 33a, and a second connection terminal 32a. The connections between the terminals of the second wiring connector B and the terminals of the upper substrate 44 are as follows: The negative connection terminal 22a is connected to terminal n. The positive connection terminal 21a is connected to terminal m. The third connection terminal 33a is connected to terminal p. The second connection terminal 32a is connected to terminal q.

[0159] A negative connection terminal 22a and a positive connection terminal 21a are provided on the upper connecting portion Cu of the third wiring connector C. The connection between the terminals of the third wiring connector C and the terminals of the upper substrate 44 is as follows: The negative connection terminal 22a is connected to terminal s. The positive connection terminal 21a is connected to terminal r.

[0160] The upper connecting portion Du of the fourth wiring connector D is provided with a negative connection terminal 22a and a positive connection terminal 21a, as well as a third connection terminal 33a and a second connection terminal 32a. The connections between the terminals of the fourth wiring connector D and the terminals of the upper substrate 44 are as follows: The negative connection terminal 22a is connected to terminal g. The positive connection terminal 21a is connected to terminal f. The third connection terminal 33a is connected to terminal h. The second connection terminal 32a is connected to terminal j.

[0161] In the upper substrate 44, terminals b, n, s, and g, which are connected to the negative terminal 22a of each wiring connector A-D, are connected to the anode side of the bypass diode 46. Terminals a, m, r, and f, which are connected to the positive terminal 21a of each wiring connector A-D, are connected to the cathode side of the bypass diode 46. Thus, the solar cell modules 91 and 92 connected to wiring connectors A-D share a single bypass diode 46.

[0162] In the upper substrate 44, terminals a, m, r, and f, which are connected to the positive terminal 21a of each wiring connector A-D, are connected to the anode side of the anti-reverse current diode 47. The cathode side of the anti-reverse current diode 47 is connected to the wiring or terminal described later. Thus, the solar cell modules 91 and 92 connected to wiring connectors A-D share a single anti-reverse current diode 47.

[0163] like Figure 24 As shown in the right figure, a third connecting terminal 33b, a second connecting terminal 32b, and a first connecting terminal 31b are provided in the lower connecting portion Bd of the second wiring connector B. The connection between the terminals of the second wiring connector B and the terminals of the lower substrate 45 is as follows: The third connecting terminal 33b is connected to terminal R. The second connecting terminal 32b is connected to terminal S. The first connecting terminal 31b is connected to terminal E.

[0164] A third connection terminal 33b and a second connection terminal 32b are provided on the lower connecting portion Cd of the third wiring connector C. The connection between the terminals of the third wiring connector C and the terminals of the lower substrate 45 is as follows: The third connection terminal 33b is connected to terminal M. The second connection terminal 32b is connected to terminal N.

[0165] A third connection terminal 33b and a first connection terminal 31b are provided on the lower connecting portion Dd of the fourth wiring connector D. The connection between the terminals of the fourth wiring connector D and the terminals of the lower substrate 45 is as follows: The third connection terminal 33b is connected to terminal F. The first connection terminal 31b is connected to terminal H.

[0166] The terminals of the upper substrate 44 and the terminals of the lower substrate 45 are connected by the following wiring: Terminal t is connected to terminal T by wiring tT. Terminal u is connected to terminal U by wiring uU. Terminal v is connected to terminal V by wiring vV. ​​Terminal w is connected to terminal W by wiring wW.

[0167] The following explanation is in Figure 24 The wiring box 40 of the modified example shown has formed Figure 17 The wiring patterns 61-63 are shown below. The following explanations are related to... Figure 17 The wiring patterns 61 to 63 are described in the order described below. In the following description, the connection terminals and connecting terminals corresponding to each terminal of the upper substrate 44 or the lower substrate 45 are shown in parentheses.

[0168] The second wiring pattern 62 is formed between the fourth wiring connector D and the second wiring connector B as follows: Terminal f (21a) is connected to terminal E (31b) via anti-reverse diode 47 and wiring vV. ​​Terminal j (32a) is connected to terminal S (32b) via wiring uU. Terminal h (33a) is connected to terminal R (33b) via wiring wW. Terminal g (22a) is connected to terminal h and wiring wW.

[0169] The first wiring pattern 61 is formed between the first wiring connector A and the third wiring connector C as follows: Terminal b (22a) is connected to terminal c (33a) via terminals h and w. Terminal e (31a) is connected to terminal M (33b) via wiring vV. ​​Terminal a (21a) is connected to wiring vV via anti-reverse current diode 47. Terminal d (32a) is connected to terminal N (32b) via wiring uU.

[0170] The third wiring pattern 63 is formed between the second wiring connector B and the fourth wiring connector D as follows: Terminal q (32a) is connected to terminal H (31b) via wiring vV. ​​Terminal p (33a) is connected to terminal F (33b) via terminal h, wiring wW and terminal R. Terminal n (22a) is connected to wiring wW via terminal h.

[0171] Figure 25 This is a first explanatory diagram of the conduction path of a modified example of the wiring box 40 of the second circuit 60. Figure 26 This is the second explanatory diagram. Figure 27 This is the third explanatory diagram. Figure 17 The second circuit 60 shown uses... Figure 25 The top and bottom images Figure 26 The top and bottom images and Figure 27 The upper and lower images are connected sequentially to form the image. Figure 25-27 The conduction path is represented by a thick dashed line.

[0172] Through such Figure 25 The first unit α of the second circuit 60 is formed by connecting the solar cell modules 91 and 92 and the wiring box 40 in the modified example as shown. This is achieved by, as... Figure 26 The second unit β of the second circuit 60 is formed by connecting the solar cell modules 91 and 92 and the wiring box 40 in the modified example as shown. This is achieved by, as... Figure 27 The third unit γ of the second circuit 60 is formed by connecting the solar cell modules 91 and 92 and the wiring box 40 of the modified example as shown.

[0173] Thus, the second circuit 60 is completed.

[0174] exist Figures 25-27 A conductive path, represented by a thick dashed line, is formed in the second circuit 60. This achieves... Figure 18 The conduction path of the second circuit 60 shown is implemented. Figure 16 The layout of the second circuit 60 is shown.

[0175] (First Implementation) Figure 28 This is a circuit diagram of a solar power generation system 80 according to the first embodiment. The solar power generation system 80 includes circuits 50 and 60 including a solar cell module 1 and a wiring box 40, a conversion box 70, and a power conversion device 81.

[0176] Figure 29 This is a plan view of the adapter box 70. The adapter box 70 has a housing 70c, a base plate 75, a cable connector 78, and multiple adapter connectors J.

[0177] The housing 70c is the same as the housing 40c of the wiring box 40 mentioned above.

[0178] The material and shape of the substrate 75 are the same as those of the upper substrate 44 or the lower substrate 45 of the wiring box 40. The substrate 75 is housed inside the housing 70c.

[0179] Cable connector 78 is a DC cable connector such as MC4 (Multi-Contact 4). Cable connector 78 is located on one of the four sides of housing 70c.

[0180] Multiple adapter connectors J~L, for example, three adapter connectors J~L. The three adapter connectors J~L are disposed on the remaining three of the four sides of the housing 70c. The three adapter connectors J~L are a first adapter connector J, a second adapter connector K, and a third adapter connector L. Cable connector 78 and the second adapter connector K are disposed on opposite sides. The first adapter connector J and the third adapter connector L are disposed on opposite sides.

[0181] Figure 30This is a schematic diagram of the converter box 70. The converter box 70 has internal wiring 70w. The internal wiring 70w is formed on the upper surface of the substrate 75. The internal wiring 70w includes positive wiring 73 and negative wiring 74.

[0182] The cable connector 78 includes a positive cable connector 7813 and a negative cable connector 78n. The positive cable connector 7813 is connected to the positive wiring 73, and the negative cable connector 78n is connected to the negative wiring 74.

[0183] The second adapter connector K has an upper connecting portion Ku and a lower connecting portion Kd. The upper connecting portion Ku is located on the upper side, and the lower connecting portion Kd is located on the lower side. Figure 30 In the middle section, the upper connecting portion Ku is described on the side away from the substrate 75, and the lower connecting portion Kd is described on the side closer to the substrate 75. The upper connecting portion Ku and the lower connecting portion Kd have two or more (six in the example of the embodiment) connecting portions in the lateral direction.

[0184] The lower connecting section Kd has two connecting terminals (conversion box connecting terminals) 76 and 77. These two connecting terminals 76 and 77 can be connected to the two connecting terminals (battery connecting terminals) of the solar cell module 1, which serve as the positive and negative output terminals of circuits 50 and 60. The two connecting terminals 76 and 77 are also connected to the corresponding positive wiring 73 and negative wiring 74.

[0185] The upper connecting part Ku has two connection terminals (conversion box connection terminals) 71 and 72. The two connection terminals 71 and 72 can be connected to the positive connection terminal and the negative connection terminal (battery connection terminal) of the solar cell module 1. The two connection terminals 71 and 72 are connected to the corresponding positive wiring 73 and negative wiring 74.

[0186] The upper connecting portion Ku and the lower connecting portion Kd preferably have four or more connecting portions in the lateral direction. In this case, the positions of the two connecting terminals 71 and 72 in the upper connecting portion Ku and the positions of the two connecting terminals 76 and 77 in the lower connecting portion Kd can be staggered in the lateral direction.

[0187] The first adapter connector J and the third adapter connector L are formed in the same way as the second adapter connector K.

[0188] like Figure 28As shown, the positive and negative output terminals of circuits 50 and 60 are connected to the two connection terminals 76 and 77 of the conversion box 70 via a third intermediate cable 97. Two connecting wires (intermediate connecting wires) are formed on the third intermediate cable 97. The third intermediate cable 97 has third intermediate connectors (not shown) at both ends in the R direction. The third intermediate connector on the +R side of the third intermediate cable 97 is connected to the connector P on the -R side of the solar cell module 91 at the -R side end of circuits 50 and 60. The third intermediate connector on the -R side of the third intermediate cable 97 is connected to the second conversion connector K of the conversion box 70. The third intermediate cable 97 connects the positive and negative output terminals of the upper connecting portion Pu of connector P to the connection terminals 76 and 77 of the lower connecting portion Kd of the second conversion connector K.

[0189] The cable connector 78 of the conversion box 70 is connected to the power conversion device 81 via a fourth intermediate cable 98. The fourth intermediate cable 98 separately connects the positive cable connector 78p and the negative cable connector 78n to the power conversion device 81.

[0190] The power conversion device 81 converts the direct current generated by the solar cell modules of circuits 50 and 60 into alternating current. The power conversion device 81 then provides the converted alternating current to the user.

[0191] The solar power generation system is configured as described above.

[0192] exist Figure 28 In this example, circuits 50 and 60 are connected to the second conversion connector K of the conversion box 70. Alternatively, circuits 50 and 60 can also be connected to the first conversion connector J or the third conversion connector L of the conversion box 70. This allows for changing the connection direction of the power conversion device 81 relative to circuits 50 and 60.

[0193] Figure 31 This is a circuit diagram of the second circuit 60 of a solar power generation system, a variation of the first embodiment. Descriptions of variations that share similarities with the first embodiment are sometimes omitted. Various methods exist for increasing the number of solar cell modules 1 included in the second circuit 60. As described above, one method is... Figure 17 The method of adding a solar cell module 91 and a second wiring pattern 62 of a wiring box 40 to the middle part of the R direction of the units α, β, and γ shown. This increases the number of solar cell modules connected in parallel within units α, β, and γ. The first circuit 50 is also the same as the second circuit 60.

[0194] Figure 31 The second circuit 60 shown is Figure 17 A modified example of the second circuit 60 shown. Arranged in... Figure 17 A solar cell module 91 at the end of the -R side Figure 31 The middle section is replaced by multiple solar cell modules 91a, 91b, and 91c. These multiple solar cell modules 91a, 91b, and 91c are interconnected via the aforementioned first intermediate cable 95. Thus, the multiple solar cell modules 91a, 91b, and 91c are connected in parallel. That is, through... Figure 31 This method can increase the number of solar cell modules connected in parallel within units α, β, and γ of the second circuit 60. The first circuit 50 is also the same as the second circuit 60.

[0195] (Second Implementation) Figure 32 This is a circuit diagram of the second circuit 60 of the solar power generation system 80 according to the second embodiment. In the second embodiment, the converter box 70 is used to connect the solar cell modules branching from the wiring box 40. Descriptions of the second embodiment that are similar to those of the first embodiment are sometimes omitted.

[0196] exist Figure 17 In the second circuit 60, the wiring patterns 61, 62, and 63 of multiple wiring boxes 40 are connected in the R direction via solar cell modules 91 and 92. Thus, the second circuit 60 extends in a row in the R direction. In contrast, in Figure 32 In the second circuit 60, the wiring patterns 61, 62, and 63 of the multiple wiring boxes 40 are connected in the R direction via a second intermediate cable 96.

[0197] Three or more connecting wires (intermediate connecting wires) are formed in the second intermediate cable 96. The second intermediate cable 96 has second intermediate connectors (not shown) at both ends in the R direction. The second intermediate connectors of the second intermediate cable 96 are connected to the corresponding wiring connectors A to D of the wiring box 40. The second intermediate cable 96 connects the connecting terminals 31a to 33a on the -R side of the wiring box 40 located in the +R direction to the connecting terminals 31b to 33b on the +R side of the wiring box 40 located in the -R direction. Thus, adjacent wiring boxes 40 in the R direction are connected via the second intermediate cable 96.

[0198] Let the direction orthogonal to the R direction be the S direction. Figure 32 In the second circuit 60, a solar cell 94 is connected to the wiring box 40 via a conversion box 70 in the S direction. For example, the conversion box 70 is disposed in the S direction at the end of the wiring box 40 located on the -R side of the second circuit 60.

[0199] The wiring box 40 and the conversion box 70 are connected by the aforementioned third intermediate cable 97. The third intermediate connector on the -S side of the third intermediate cable 97 is connected to the fourth wiring connector D on the -R side of the wiring box 40. The third intermediate connector on the +S side of the third intermediate cable 97 is connected to the second conversion connector K on the -R side of the conversion box 70. The third intermediate cable 97 has connection terminals 21a and 22a disposed on the fourth wiring connector D and connection terminals 71 and 72 disposed on the upper connecting portion Ku of the second conversion connector K.

[0200] In configuration Figure 32 In the wiring box 40 at the -R side end, a fourth wiring connector D is arranged on the -R side, and a first wiring connector A is arranged on the +S side. Figure 24 In the modified wiring box 40 of the second embodiment shown, connection terminals 21a and 22a are provided for all four wiring connectors A to D. In this case, the third intermediate connector on the -S side of the third intermediate cable 97 can be connected to the first wiring connector A on the +S side of the wiring box 40. As a result, the flexibility in the placement of the third intermediate cable 97 and the solar cell 94 is increased.

[0201] A standard solar cell 94 is disposed on the +S side of the conversion box 70. The solar cell 94 only has connection terminals (positive connection terminal and negative connection terminal) and does not have connecting wiring or connection terminals. The cable connector 78 of the conversion box 70 is connected to the connection terminals of the solar cell 94. Thus, the connection terminals of the solar cell 94 are connected to the connection terminals 21a and 22a of the wiring box 40 via the conversion box 70.

[0202] The wiring box 40, except for the one located at the -R side end of the second circuit 60, is the same as described above. Thus, a connection is formed in the second circuit 60 with... Figure 18 The same conduction path.

[0203] As mentioned above, in Figure 32 In the second circuit 60, multiple wiring boxes 40 are arranged along the R direction, and solar cells 94 are branched along the S direction. The first circuit 50 is the same as the second circuit 60.

[0204] exist Figure 32 In this example, the wiring box 40 is connected to the second conversion connector K of the conversion box 70. Alternatively, the wiring box 40 can also be connected to the first conversion connector J or the third conversion connector L of the conversion box 70. This allows for changing the connection direction of the solar cell 94 relative to the wiring box 40.

[0205] Figure 33This is a circuit diagram of the second circuit 60 of the solar power generation system 80, a variation of the second embodiment. In this variation of the second embodiment, multiple solar cell modules are arranged on the +S side of the conversion box 70. Sometimes, descriptions of variations that are similar to the second embodiment are omitted.

[0206] Similar to the second embodiment, the wiring box 40 and the conversion box 70 are connected by a third intermediate cable 97. Figure 33 In a modified example, the third intermediate connector on the +S side of the third intermediate cable 97 is connected to the third conversion connector L of the conversion box 70. The connection terminals 21a and 22a of the fourth wiring connector D disposed in the wiring box 40 are connected to the connection terminals 71 and 72 of the upper connecting part Ku disposed in the third conversion connector L via the third intermediate cable 97.

[0207] A solar cell module 91a is connected to the +S side of the conversion box 70 via a third intermediate cable 97. The third intermediate connector on the -S side of the third intermediate cable 97 is connected to the first conversion connector J of the conversion box 70. The third intermediate connector on the +S side of the third intermediate cable 97 is connected to the connector Q on the -S side of the solar cell module 91a. Connection terminals 71 and 72 on the first conversion connector J and connection terminals 21q and 22q on the connector Q are connected via the third intermediate cable 97.

[0208] A solar cell module 91b is connected to the +S side of the solar cell module 91a via a third intermediate cable 97. The connection terminals 21p and 22p of the connector P of the solar cell module 91a and the connection terminals 21q and 22q of the connector Q of the solar cell module 91b are connected via the third intermediate cable 97.

[0209] Similarly, solar cell module 91c is connected to the +S side of solar cell module 91b via a third intermediate cable 97. Likewise, other solar cell modules are connected to the solar cell modules at the +S side end via the third intermediate cable 97 thereafter.

[0210] The same applies to the wiring box 40 except for the wiring box 40 located at the end of the second circuit 60 on the -R side.

[0211] exist Figure 33 In the second circuit 60, multiple solar cell modules are connected to the +S side of the wiring box 40 via a conversion box 70. These multiple solar cell modules are connected in parallel. Figure 33This method can increase the number of solar cell modules connected in parallel within units α, β, and γ of the second circuit 60. The first circuit 50 is the same as the second circuit 60. Multiple solar cell modules can also be connected on the +S side of the wiring box 40 via the third intermediate cable 97 without going through the conversion box 70.

[0212] exist Figure 33 In the second circuit 60, multiple wiring boxes 40 are arranged along the R direction. Multiple solar cell modules 1 are branched out from each wiring box 40 in the S direction. Figure 34 This is a configuration diagram of the constituent elements of a solar power generation system 80, a variation of the second embodiment. (Using...) Figure 33 The second circuit 60 constitutes Figure 34 A solar power generation system 80 is provided. In this solar power generation system 80, multiple solar cell modules 91 and 92 are arranged in a two-dimensional configuration along the R and S directions. The multiple solar cell modules 91 and 92 are mounted on a wall surface such as a partition wall. By arranging as many solar cell modules 91 and 92 as possible in the provided space, the power generation can be increased.

[0213] Figure 35 This is a wiring diagram showing the series connection of multiple solar cell modules 1. The negative terminal of the solar cell module 1 on the -S side is connected to the positive terminal of the solar cell module 1 on the +S side in sequence. Thus, multiple solar cell modules 1 are connected in series. It is also possible to... Figure 33 The multiple solar cell modules connected in parallel shown are replaced with Figure 35 The diagram shows multiple solar cell modules connected in series. This allows for an increase in the number of solar cell modules connected in series within units α, β, and γ of the second circuit 60. The first circuit 50 is identical to the second circuit 60.

[0214] Figure 36 This is an illustrative diagram illustrating the installation method of the solar power generation system 80 relative to the guardrail 85. Figure 36 In the middle, the first unit α of the first circuit 50 of the solar power generation system 80 is laid on the side of the guardrail 85.

[0215] exist Figure 36 In the diagram above, solar cell modules 91, 92, and 93 are arranged horizontally and spaced apart from each other. Wiring boxes 40 are arranged between adjacent solar cell modules 91, 92, and 93.

[0216] In contrast, Figure 36In the diagram below, solar cell modules 91, 92, and 93 are arranged closely together without any gaps. A groove extending horizontally is formed in the center of the vertical direction on the side of the guardrail 85. The wiring box 40 is disposed on the back side of the solar cell modules 91, 92, and 93 and is housed in the groove of the guardrail 85. Therefore, more solar cell modules can be arranged on the side of the guardrail 85, increasing power generation. The second circuit 60 is the same as the first circuit 50.

[0217] As described in detail above, the solar power generation system 80 of the embodiment includes a solar cell module 1, a wiring box 40, and a conversion box 70. The solar cell module 1 has battery connection terminals serving as positive and negative terminals, and battery connection terminals serving as terminals for three or more connecting wires 31-34. The wiring box 40 has multiple wiring connectors A-D and internal wiring 40W. The multiple wiring connectors A-D have wiring box connection terminals that can connect to the battery connection terminals and wiring box connection terminals that can connect to the battery connection terminals. The internal wiring 40W can form circuits 50 and 60 that combine series and parallel connections of the solar cell modules 1. The conversion box 70 has conversion box connection terminals 76 and 77 that can connect to the battery connection terminals, and a cable connector 78 that can connect to the power conversion device 81.

[0218] Based on this configuration, a wiring box 40 and a conversion box 70 can be used to construct the circuits 50 and 60 of the solar power generation system. Therefore, the cost of the solar power generation system 80 can be reduced.

[0219] The solar power generation system 80 can increase the number of combinations of solar cell modules 1 and wiring boxes 40. The solar power generation system 80 can replace one solar cell module 1 by connecting multiple interconnected solar cell modules 1. The solar power generation system 80 can increase the number of solar cell modules 1 connected to the wiring box terminals via the conversion box 70.

[0220] Based on this configuration, the number of solar cell modules 1 can be increased through various methods. Even when increasing the number of solar cell modules 1 connected in parallel, no special DC cables are required. Therefore, the cost of the solar power generation system 80 can be reduced.

[0221] The adapter box 70 has a housing 70c and three adapter connectors J~L. The housing 70c is quadrilateral in top view. The three adapter connectors J~L have adapter box connection terminals 71 and 72 and adapter box connection terminals 76 and 77 that can be connected to the battery connection terminals. The three adapter connectors J~L are arranged on three of the four sides of the housing 70c, and a cable connector 78 is arranged on one side.

[0222] Based on this configuration, the conversion connector J~L of the conversion box 70 connected to the circuits 50 and 60 can be selected, thereby changing the connection direction of the power conversion device 81 relative to the circuits 50 and 60.

[0223] According to at least one embodiment described above, the system includes a solar cell module 1, a wiring box 40, and a conversion box 70. This allows for cost reduction in the solar power generation system 80.

[0224] (Third Implementation) Figure 37 This is a schematic diagram of the solar cell module 1s according to the third embodiment. Figure 37 The left side is a floor plan. Figure 37 The right side is a side cross-sectional view of line S37-S37. The solar cell module 1s of the third embodiment has a positive electrode connection wiring 21 and a negative electrode connection wiring 22, two connection wirings 31 and 32, and connectors P and Q.

[0225] The positive electrode connection wiring 21 is connected to the positive electrode of the solar cell element 10 via the lead wiring 11. The positive electrode connection wiring 21 is formed only on the +X side of the solar cell element 10.

[0226] The negative electrode connection wiring 22 is connected to the negative electrode of the solar cell element 10 via the lead-out wiring 12. The negative electrode connection wiring 22 is formed only on the -X side of the solar cell element 10.

[0227] Connecting wires 31 and 32 are a first connecting wire 31 and a second connecting wire 32. Connecting wires 31 and 32 are not connected to the positive or negative terminals of the solar cell element 10. Connecting wires 31 and 32 extend longer than the solar cell element 10 in the X direction. Connecting wires 31 and 32 are configured to overlap with the solar cell element 10 when viewed from the Z direction. Connecting wires 31 and 32 can also be configured not to overlap with the solar cell element 10 when viewed from the Z direction. Connecting wires 31 and 32 are used for at least one of series connection and parallel connection of the solar cell element 10.

[0228] Connectors P and Q are the first connector P and the second connector Q. The first connector P is located at the -X side end of the solar cell module 1s. The second connector Q is located at the +X side end of the solar cell module 1s.

[0229] Connectors P and Q have at least one of a positive connection terminal (battery positive connection terminal) 21q and a negative connection terminal (battery negative connection terminal) 2210, and connection terminals (battery connection terminals) 31p, 31q, 32p, and 32q. The positive connection terminal 21q connects the positive connection wiring 21 to the outside. The negative connection terminal 22p connects the negative connection wiring 22 to the outside. The connection terminals 31p, 31q, 32p, and 32q connect the connection wirings 31 and 32 to the outside. The connection terminals 31p, 31q, 32p, and 32q are first connection terminals 31p and 31q and second connection terminals 32p and 32q. The first connection terminals 31p and 31q connect the first connection wiring 31 to the outside. The second connection terminals 32p and 32q connect the second connection wiring 32 to the outside.

[0230] Connectors P and Q each have only one positive connection terminal 21q or one negative connection terminal 22p, one first connection terminal 31p, 31q and one second connection terminal 32p, 32q.

[0231] The first connector P has only one negative terminal 22p, one first connection terminal 31p, and one second connection terminal 32p.

[0232] The second connector Q has only one positive connection terminal 21q, one first connection terminal 31q, and one second connection terminal 32q.

[0233] Figure 38 This is a layout diagram of the third circuit 176. The third circuit 176 is a circuit formed by connecting the first unit A, the second unit B, and the third unit C in series. The first unit A, the second unit B, and the third unit C are units formed by connecting two solar cell modules 91 and 92 in series. The solar cell modules 91 and 92 in the third circuit 176 are the solar cell module 1s of the third embodiment.

[0234] Figure 39 This is the circuit diagram of the third circuit 176. The first unit A, the second unit B, and the third unit C are sequentially configured from the -R side to the +R side. Each unit A, B, and C has two solar cell modules 91 and 92 and one wiring box 151.

[0235] The two solar cell modules 91 and 92 are connected without a wiring box. The second connector Q on the -R side of the solar cell module 91 on the +R side is connected to the first connector P on the +R side of the solar cell module 92 on the -R side. Thus, the solar cell elements 10 of the two solar cell modules 91 and 92 are connected in series.

[0236] Wiring box 151 is configured on the +R side of two solar cell modules 91 and 92. Wiring box 151 has connectors on both the -R and +R sides. The connectors of wiring box 151 have a positive connection terminal (wiring box positive connection terminal) 21a or a negative connection terminal (wiring box negative connection terminal) 22b, first connection terminals (wiring box connection terminals) 31a and 31b, and second connection terminals (wiring box connection terminals) 32a and 32b.

[0237] The connector on the -R side of the wiring box 151 has only a negative connection terminal 22b, a first connection terminal 31b, and a second connection terminal 32b. The connector on the -R side of the wiring box 151 is connected to the first connector P on the +R side of the solar cell module 91 on the +R side.

[0238] The connector on the +R side of the wiring box 151 has only a positive connection terminal 21a, a first connection terminal 31a, and a second connection terminal 32a. The connector on the +R side of the wiring box 151 is connected to the second connector Q on the -R side of the solar cell module 92 in the adjacent unit on the +R side.

[0239] The internal wiring configuration of the wiring box 151 is as follows. The positive terminal 21a on the +R side and the negative terminal 22b on the -R side are connected by wiring 20. The first connection terminal 31a on the +R side is connected to wiring 20. Wiring 20 is connected to the first connection terminal 31b on the -R side via bypass diode 46. The second connection terminal 32b on the -R side is connected to the second connection terminal 32a on the +R side.

[0240] The third circuit 176 has a terminal connector W and a conversion box 170.

[0241] The terminal connector W is located on the -R side of the first unit A at the -R side end. The terminal connector W has a positive connection terminal 21a, a first connection terminal 31a, and a second connection terminal 32a. The second connector Q on the -R side of the solar cell module 92 on the -R side of the first unit A is connected to the terminal connector W. Inside the terminal connector W, the positive connection terminal 21a, the first connection terminal 31a, and the second connection terminal 32a are interconnected.

[0242] The converter box 170 is located on the +R side of the third unit C at the end located on the +R side. The first connection terminal 31a and the second connection terminal 32a on the +R side of the wiring box 151 of the third unit C are respectively connected to the first connection terminal 31b and the second connection terminal 32b on the -R side of the converter box 170. Inside the converter box 170, the first connection terminal 31b on the -R side is connected to the first connection terminal 31a on the +R side. The second connection terminal 32b on the -R side is connected to the second connection terminal 32a on the +R side via an anti-reverse current diode 47. In the converter box 170, the second connection terminal 32a on the +R side becomes the positive terminal of the third circuit 176, and the first connection terminal 31a on the +R side becomes the negative terminal of the third circuit 176.

[0243] As described above, it has been achieved Figure 38 The layout of the third circuit 176 is shown.

[0244] In the third circuit 176, multiple solar cell modules 91 and 92 are connected in series using two connecting wires 31 and 32. In the third circuit 176, by adding a solar cell module 1s of the third embodiment between two solar cell modules 91 and 92 in each unit A, B, and C, the number of solar cell modules connected in series increases. The number of solar cell modules in each unit A, B, and C corresponds to the number of solar cell modules bypassed by the bypass diode 46 of the wiring box 151.

[0245] Figure 40 This is a schematic configuration diagram of the solar cell module 1s of the first variation of the third embodiment. Figure 40 The left side is a floor plan. Figure 40 The right side is a side cross-sectional view along line S40-S40. Sometimes, descriptions of the first variation that shares similarities with the third embodiment are omitted.

[0246] The first modified solar cell module 1s has a bypass diode 26. The bypass diode 26 is disposed between the lead wire 11 of the negative terminal on the -Y side and the positive terminal on the +Y side of the solar cell element 10.

[0247] Figure 41 This is the circuit diagram for the fourth circuit 177. The implementation of the fourth circuit 177... Figure 6 The layout is shown. The fourth circuit 177 is a circuit formed by connecting the first unit α and the second unit β in parallel. The first unit α and the second unit β are circuits formed by connecting three solar cell modules 91, 92, and 93 in series. The solar cell modules 91, 92, and 93 of the fourth circuit 177 are the solar cell module 1s of the first modified example.

[0248] like Figure 41As shown, the first unit α and the second unit β are sequentially arranged from the -R side to the +R side. Each unit α and β has three solar cell modules 91, 92, and 93 and one wiring box 152. The three solar cell modules 91, 92, and 93 are connected without passing through the wiring box. Thus, the solar cell elements 10 of the three solar cell modules 91, 92, and 93 are connected in series.

[0249] Wiring box 152 is configured on the +R side of three solar cell modules 91, 92, and 93. The internal wiring configuration of wiring box 152 is as follows: The first connection terminal 31a on the +R side and the first connection terminal 31b on the -R side are connected via wiring 31c. The negative connection terminal 22b on the -R side is connected to wiring 31c. The second connection terminal 32b on the -R side and the second connection terminal 32a on the +R side are connected via wiring 32c. The positive connection terminal 21a on the +R side is connected to wiring 32c.

[0250] The fourth circuit 177 has a terminal connector W and a converter box 170.

[0251] Inside the terminal connector W, the positive terminal 21a is connected to the second terminal 32a. The other terminals are terminated.

[0252] Through the above, achieve Figure 6 The layout shown.

[0253] In the fourth circuit 177, multiple solar cell modules 91, 92, and 93 are connected in series and in parallel using two connecting wires 31 and 32. In the fourth circuit 177, by adding a solar cell module 1s of the first variation to the middle portion in the R direction within a unit, the number of solar cell modules connected in series within the unit is increased. In the fourth circuit 177, by arranging one and one wiring box 152 at the end of the +R side within a unit, multiple units are connected in parallel. In the fourth circuit 177, by adding other units between the first unit α and the second unit β, the number of units connected in parallel is increased. Thus, in the fourth circuit 177, the number of solar cell modules connected in series and in parallel can be freely adjusted. With the solar cell module 1s of the first variation, the fourth circuit 177 can be constructed without external wiring. Therefore, the cost of the fourth circuit 177 can be reduced.

[0254] In the third embodiment and its first variation, multiple solar cell modules 1s can be connected in series without a wiring box. Since silicon semiconductor solar cell elements have high current and low voltage, they are often connected in series. The solar cell module 1s of the third embodiment and the first variation are suitable for cases involving silicon semiconductor solar cell elements 10.

[0255] Furthermore, the use of a 3-pole connector as connectors P and Q of the solar cell module 1s can reduce the cost of connectors P and Q. This simplifies the wiring of the solar cell module 1s and reduces its cost.

[0256] In addition, it can reduce the number and types of wiring boxes. It can simplify the wiring of the wiring boxes, thus making the wiring boxes smaller.

[0257] (Fourth Implementation) Figure 42 This is a schematic diagram of the solar cell module 1p according to the fourth embodiment. Figure 42 The left side is a floor plan. Figure 42 The right side is a side cross-sectional view at line S42-S42. The solar cell module 1p of the fourth embodiment has a positive electrode connection wiring 21 and a negative electrode connection wiring 22, a connecting wiring 31, and connectors P and Q. Descriptions of the fourth embodiment that are similar to the third embodiment are sometimes omitted.

[0258] The positive electrode connection wiring 21 is connected to the positive electrode of the solar cell element 10 via the lead wiring 11. The positive electrode connection wiring 21 extends longer than the solar cell element 10 in the X direction. The positive electrode connection wiring 21 is configured to overlap with the solar cell element 10 when viewed from the Z direction. The positive electrode connection wiring 21 can also be configured not to overlap with the solar cell element 10 when viewed from the Z direction.

[0259] The negative electrode connection wiring 22 is connected to the negative electrode of the solar cell element 10 via the lead-out wiring 12. The negative electrode connection wiring 22 is formed separately on both sides of the solar cell element 10 in the X direction. The negative electrode connection wiring 22 can also be formed continuously in the X direction in the same way as the positive electrode connection wiring 21.

[0260] The connecting wire 31 is a first connecting wire 31. The first connecting wire 31 is not connected to the positive or negative terminal of the solar cell element 10. The first connecting wire 31 extends longer than the solar cell element 10 in the X direction. The first connecting wire 31 is configured to overlap with the solar cell element 10 when viewed from the Z direction. The first connecting wire 31 can also be configured not to overlap with the solar cell element 10 when viewed from the Z direction. The first connecting wire 31 is used for at least one of series connection and parallel connection of the solar cell element 10.

[0261] Connectors P and Q are the first connector P and the second connector Q. The first connector P is disposed at the end of the solar cell module 1P on the -X side. The second connector Q is disposed at the end of the solar cell module 1P on the +X side.

[0262] Connectors P and Q have positive connection terminals 21p and 21q, negative connection terminals 22p and 22q, and first connection terminals 31p and 31q. Positive connection terminals 21p and 21q connect positive connection wiring 21 to the outside. Negative connection terminals 22p and 22q connect negative connection wiring 22 to the outside. First connection terminals 31p and 31q connect first connection wiring 31 to the outside.

[0263] Connectors P and Q each have only one positive connection terminal 21p, 21q, one negative connection terminal 22p, 22q, and one first connection terminal 31p, 31q.

[0264] The first connector P has only one negative connection terminal 22p, one positive connection terminal 21P, and one first connection terminal 31p.

[0265] The second connector Q has only one negative connection terminal 22q, one positive connection terminal 21q, and one first connection terminal 31q.

[0266] Figure 43 This is the circuit diagram for Circuit 178 (the fifth circuit). Circuit 178 is implemented... Figure 16 The layout is shown. The fifth circuit 178 is a circuit formed by connecting the first unit γ, the second unit β, and the third unit α in series. The first unit γ, the second unit β, and the third unit α are circuits formed by connecting two solar cell modules 91 and 92 in parallel. The solar cell modules 91 and 92 of the fifth circuit 178 are the solar cell module 1p of the fourth embodiment.

[0267] like Figure 43 As shown, the first unit γ, the second unit β, and the third unit α are sequentially arranged from the -R side to the +R side. Each unit α, β, and γ has two solar cell modules 91 and 92 and one wiring box 161.

[0268] The two solar cell modules 91 and 92 are connected without a wiring box. The second connector Q on the -R side of the solar cell module 91 on the +R side is connected to the first connector P on the +R side of the solar cell module 92 on the -R side. Thus, the solar cell elements 10 of the two solar cell modules 91 and 92 are connected in parallel.

[0269] Wiring box 161 is configured on the +R side of two solar cell modules 91 and 92. Wiring box 161 has connectors on both the -R and +R sides. The connectors of wiring box 161 have positive connection terminals (wiring box positive connection terminals) 21a and 21b, negative connection terminals (wiring box negative connection terminals) 22a and 22b, and first connection terminals (wiring box connection terminals) 31a and 31b.

[0270] The connector on the -R side of the wiring box 161 has only a positive connection terminal 21b, a negative connection terminal 22b, and a first connection terminal 31b. The connector on the -R side of the wiring box 161 is connected to the first connector P on the +R side of the solar cell module 91 on the +R side.

[0271] The connector on the +R side of the wiring box 161 has only a positive connection terminal 21a, a negative connection terminal 22a, and a first connection terminal 31a. The connector on the +R side of the wiring box 161 is connected to the second connector Q on the -R side of the solar cell module 92 in the adjacent unit on the +R side.

[0272] The internal wiring configuration of the wiring box 161 is as follows. The positive terminal 21a on the +R side and the negative terminal 22b on the -R side are connected by wiring 22c. Wiring 22c is connected to the positive terminal 21b on the -R side via a bypass diode 46. The first connection terminal 31b on the -R side is connected to the first connection terminal 31a on the +R side.

[0273] The fifth circuit 178 has a terminal connector W and a converter box 170.

[0274] The terminal connector W is configured on the -R side of the first unit γ at the -R side end. The terminal connector W has a positive connection terminal 21a and a first connection terminal 31a. The second connector Q on the -R side of the solar cell module 92 on the -R side of the first unit γ is connected to the terminal connector W. Inside the terminal connector W, the positive connection terminal 21a is connected to the first connection terminal 31a.

[0275] The conversion box 170 is located on the +R side of the third unit α at the end on the +R side. The positive connection terminal 21a and the first connection terminal 31a on the +R side of the wiring box 161 of the third unit α are connected to the positive connection terminal 21b and the first connection terminal 31b on the -R side of the conversion box 170, respectively. Inside the conversion box 170, the positive connection terminal 21a on the +R side is connected to the positive connection terminal 21b on the -R side. The first connection terminal 31b on the -R side is connected to the first connection terminal 31a on the +R side via an anti-reverse current diode 47. In the conversion box 170, the first connection terminal 31a on the +R side becomes the positive terminal of the fifth circuit 178, and the positive connection terminal 21a on the +R side becomes the negative terminal of the fifth circuit 178.

[0276] Through the above, achieve Figure 16 The layout shown.

[0277] In the fifth circuit 178, multiple solar cell modules 91 and 92 are connected in parallel and in series using the first connecting wiring 31. In the fifth circuit 178, by adding a solar cell module 1p of the fourth embodiment to the middle portion in the R direction within a unit, the number of solar cell modules connected in parallel within the unit increases. In the fifth circuit 178, by arranging one and one wiring box 161 at the end of the +R side within a unit, multiple units are connected in series. In the fifth circuit 178, by adding other units between each unit α, β, γ, the number of units connected in series increases. Thus, in the fifth circuit 178, the number of solar cell modules connected in parallel and in series can be freely adjusted. According to the solar cell module 1p of the fourth embodiment, the fifth circuit 178 can be constructed without external wiring. Therefore, the cost of the fifth circuit 178 can be reduced.

[0278] Figure 44 This is a schematic diagram of the solar cell module 1p of the first variation of the fourth embodiment. Figure 44 The left side is a floor plan. Figure 44 The right side is a side cross-sectional view along line S44-S44. Sometimes, descriptions of the first variation that shares similarities with the fourth embodiment are omitted.

[0279] The solar cell module 1p of the first modification has a bypass diode 26. The bypass diode 26 is disposed between the positive lead wire 11 and the negative lead wire 12.

[0280] Figure 45 This is the circuit diagram for circuit 179 (circuit 6). Circuit 179 is implemented... Figure 16 The layout is shown. The solar cell modules 91 and 92 of the sixth circuit 179 are solar cell modules 1p of the first variant.

[0281] like Figure 45 As shown, each unit α, β, γ has one and only one type of wiring box 162. The internal wiring configuration of the wiring box 162 is as follows: The positive terminal 21a on the +R side is connected to the negative terminal 22b on the -R side. The first connection terminal 31b on the -R side is connected to the first connection terminal 31a on the +R side. Other terminals are terminated.

[0282] Through the above, achieve Figure 16 The layout shown.

[0283] In the sixth circuit 179, by adding the solar cell module 1p of the first modified example to the middle part in the R direction within the unit, the number of solar cell modules connected in parallel within the unit is increased. In the sixth circuit 179, by arranging one and only one type of wiring box 162 at the end of the +R side within the unit, multiple units are connected in series. According to the solar cell module 1p of the first modified example, the sixth circuit 179 can be constructed without the use of external wiring. Therefore, the cost of the sixth circuit 179 can be reduced.

[0284] In the fourth embodiment and its first variation, multiple solar cell modules 1p can be connected in parallel without a wiring box. Solar cell elements containing transmissive cuprous oxide (Cu2O) semiconductors, perovskite semiconductors, etc., have high voltage and low current, and are therefore often connected in parallel. The solar cell module 1p of the fourth embodiment and the first variation is suitable for cases where solar cell elements 10 contain transmissive cuprous oxide (Cu2O) semiconductors, perovskite semiconductors, etc.

[0285] Furthermore, the use of a 3-pole connector as connectors P and Q of the solar cell module 1p can reduce the cost of connectors P and Q. This simplifies the wiring of the solar cell module 1p and further reduces its cost.

[0286] In addition, it can reduce the number and types of wiring boxes. It can simplify the wiring of the wiring boxes, thus making the wiring boxes smaller.

[0287] The above examples illustrate several embodiments of the present invention, but these embodiments are merely illustrative and not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, as well as within the scope of the invention described in the patent claims and its equivalents.

Claims

1. A solar power generation system, wherein, It includes solar cell modules, wiring boxes, and conversion boxes. The solar cell module has battery connection terminals that serve as positive and negative terminals, and battery connection terminals that serve as terminals for three or more connecting wires. The wiring box includes: multiple wiring connectors, wiring box connection terminals for connecting to the battery connection terminals, and wiring box connection terminals for connecting to the battery connection terminals; and internal wiring capable of forming a circuit that combines series and parallel connections of the solar cell modules. The conversion box has conversion box connection terminals that can be connected to the battery connection terminals, and cable connectors that can be connected to the power conversion device.

2. The solar power generation system as described in claim 1, wherein, This allows for an increase in the number of combinations of the solar cell module and the wiring box. One solar cell module can be replaced by multiple interconnected solar cell modules. This allows for an increase in the number of solar cell modules connected via the connection terminals of the conversion box and the wiring box.

3. The solar power generation system according to claim 1 or 2, wherein, The adapter box has: a housing, which is quadrilateral in shape when viewed from above; and three adapter connectors, including adapter box connection terminals and adapter box connection terminals that can be connected to the battery connection terminals. The three adapter connectors are disposed on three of the four sides of the housing, and the cable connector is disposed on one side.

4. A solar power generation system, wherein, It includes solar cell modules, wiring boxes, and conversion boxes. The solar cell module has battery connection terminals that serve as positive and negative terminals, and battery connection terminals that serve as terminals for connecting wiring that are not connected to the positive and negative terminals. The wiring box includes: multiple wiring connectors, wiring box connection terminals for connecting to the battery connection terminals, and wiring box connection terminals for connecting to the battery connection terminals; and internal wiring capable of forming a circuit that combines series and parallel connections of the solar cell modules. The conversion box is connected to the solar cell module or the wiring box and has a cable connector that can be connected to a power conversion device.

Images