JP7798697B2 - Solar panel wiring structure - Google Patents

Description

The present invention relates to the wiring structure of solar cell panels that form the outer walls of buildings.

In recent years, in order to realize ZEBs (Zero Energy Buildings), there has been an increasing demand for solar power generation using the outer walls of buildings and other structures. Therefore, it is being considered to use solar cell panels, which can convert light energy into electrical energy, for the curtain wall panels that make up the outer walls of buildings.

Figures 26 and 27 show a building 101 described in JP 2014-136919 A, in which part of the outer wall is made up of solar panels 100.

The outer perimeter wall of building 101 is composed of curtain wall 102. Curtain wall 102 is attached to floor slab 103 using brackets 104.

The curtain wall 102 comprises a plurality of mullions 105, a plurality of lattice beams 106, a plurality of glass panels 107, and a plurality of solar cell panels 100.

The glass panel 107 and the solar cell panel 100 are each set into an area surrounded on all four sides by mullions 105 and gables 106. Of these, the glass panel 107 forms the window section and is provided in the section corresponding to the interior space. In contrast, the solar cell panel 100 forms the wall section and is provided in the section corresponding to the attic space and underfloor space (spandrel section).

The solar cell panel 100 has a panel body 108 and positive and negative terminals (not shown).

The panel body 108 has multiple solar cells. The multiple solar cells are connected in series to form a circuit (solar cell module).

The positive and negative terminals are provided on the indoor surface (back surface) of the panel body 108 and are electrically connected to both ends of the circuit. The positive and negative terminals are housed in a terminal box 109. The terminal box 109 is disposed in the space between the solar panel 100 and the interior wall material 110. A positive current collecting cable 111 is connected to the positive terminal, and a negative current collecting cable 112 is connected to the negative terminal.

Multiple solar cell panels 100 are connected in series to form a solar cell group. For this purpose, of two solar cell panels 100 arranged adjacent to each other in the left-right direction, the positive current collecting cable 111 of one solar cell panel 100 and the negative current collecting cable 112 of the other solar cell panel 100 are each pulled out from the space between the solar cell panel 100 and the interior wall material 110 into the interior space and connected inside a cover (not shown) placed in the interior space.

Each solar cell group is connected to a power conditioner installed in the building by a dedicated output cable 113. This allows the power generated by multiple solar cell units to be collected in the power conditioner. The collected power in the power conditioner is converted from DC to AC and can be used both inside and outside the building. As a result, the primary energy balance consumed by the building can be brought close to zero, contributing to the realization of a ZEB.

Japanese Patent Application Laid-Open No. 2014-136919

Maintenance of solar power generation systems is essential for stable operation over the long term.

However, in the conventional structure described in JP 2014-136919 A, the solar cell panels 100 belonging to the same solar cell group are connected indoors. As a result, maintenance work on the solar power generation system cannot be performed from the outside of the building 101, and must be performed from inside the building 101. Specifically, maintenance workers must enter the indoor space to perform their work.

This means that the hours during which work can be performed will likely be limited to nighttime or holidays, potentially increasing the number of days required for maintenance work. Furthermore, since maintenance work requires removing the covers placed inside the interior space, there is a risk of damaging interior surfaces such as flooring and interior walls.

It has also been customary to connect the cables of solar panels that make up the outer walls of buildings in the ceiling or underfloor space. In this case, in addition to the problems that arise with the conventional structure described in JP 2014-136919 A, maintenance workers are forced to work in narrow ceiling or underfloor spaces, which can reduce work efficiency. It also becomes difficult to distinguish between cables, making it difficult to identify defective areas.

The present invention aims to provide a wiring structure for solar cell panels that allows maintenance work on solar power generation systems to be performed from the outside of a building.

A wiring structure for a solar cell panel according to one aspect of the present invention relates to a wiring structure for a solar cell panel that forms an outer wall of a building.
The solar panel has a panel body including a plurality of solar cells, and a positive terminal portion and a negative terminal portion that are arranged on the indoor surface of the panel body and are electrically connected to the plurality of solar cells.
Of the two solar cell panels arranged side by side in a predetermined direction, the positive terminal portion of one of the solar cell panels and the negative terminal portion of the other solar cell panel are connected via a connection cable, at least a portion of which is arranged outdoors relative to the panel body.

In one aspect of the solar panel wiring structure of the present invention, the connection cable can be composed of at least two cables connected via a connector connection portion located outdoors relative to the panel body.

In one aspect of the solar cell panel wiring structure of the present invention, the predetermined direction is the left-right direction, and a vertical frame having an insertion portion such as a through-hole or notch can be placed between the two solar cell panels in the left-right direction. The connection cable can then be inserted through the insertion portion of the vertical frame.

In a solar cell panel wiring structure according to one aspect of the present invention, the predetermined direction is the vertical direction, a glass panel is placed between the two solar cell panels in the vertical direction, and a vertical frame having an insertion portion such as a through hole or notch is placed on one side of the two solar cell panels in the horizontal direction. The connection cable can then be inserted through the insertion portion of the vertical frame.

In one aspect of the wiring structure of a solar panel according to the present invention, the vertical frame has a cable accommodating section extending in the vertical direction on the outdoor side of the panel body, and a portion of the connection cable can be accommodated in the cable accommodating section.
In this case, the vertical frame may have a vertical frame body fixed to the framework and a decorative member fixed to the outdoor side of the vertical frame body, and the cable housing may be provided in the decorative member. Alternatively, the cable housing may be provided in the vertical frame body.
The vertical frame may also have an openable and closable lid portion that communicates with the cable housing portion.

In one aspect of the solar cell panel wiring structure of the present invention, the solar cell panel further includes a positive current collecting cable connected to the positive terminal and a negative current collecting cable connected to the negative terminal, and both ends of the connection cable can be connected to the positive current collecting cable provided on one of the solar cell panels and the negative current collecting cable provided on the other solar cell panel, respectively.

In the wiring structure of a solar cell panel according to one aspect of the present invention, a first connector can be provided at the end of the positive collector cable, and a second connector can be provided at the end of the negative collector cable.
Furthermore, of the two ends of the connection cable, the second connector can be provided at one end that connects to the positive collector cable, and the first connector can be provided at the other end that connects to the negative collector cable.

The solar cell panel wiring structure according to one aspect of the present invention allows maintenance work on the solar power generation system to be performed from the outside of the building.

FIG. 1 is a schematic diagram of a building to which a wiring structure for solar cell panels according to a first embodiment is applied, as viewed from the outside. FIG. 2 is a vertical cross-sectional view corresponding to the cross section taken along line AA in FIG. FIG. 3 is a cross-sectional view corresponding to the cross section taken along line BB in FIG. FIG. 4 is a vertical cross-sectional view corresponding to the cross section taken along line CC in FIG. FIG. 5 is a partially enlarged view of FIG. FIG. 6 is a cross-sectional view corresponding to the cross section taken along line DD in FIG. FIG. 7 is a cross-sectional view corresponding to the cross section taken along line EE in FIG. FIG. 8 is a cross-sectional view showing the mullion removed from FIG. FIG. 9 is a side view seen from the right side of FIG. FIG. 10 is a cross-sectional view showing the mullion body taken out from FIG. FIG. 11 is a front view of FIG. 10 as viewed from the lower side (outdoor side). FIG. 12 is a side view seen from the left side of FIG. FIG. 13 is a cross-sectional view showing the decorative material taken out from FIG. FIG. 14 is a front view of FIG. 13 as viewed from the lower side (outdoor side). FIG. 15 is a schematic diagram of the solar cell panel taken out from the front side (outdoor side) according to the first embodiment. FIG. 16 is a schematic diagram showing the wiring structure of the solar cell panel more specifically than FIG. FIG. 17 is a partial enlarged view of the middle part in the left-right direction of FIG. FIG. 18 is a partial enlarged view of one side portion (left side portion) in the left-right direction of FIG. FIG. 19 is a partial enlarged view of the other side (right side) in the left-right direction of FIG. FIG. 20 is a diagram showing a second example of the embodiment, and corresponds to FIG. FIG. 21 is a diagram showing a second example of the embodiment, and corresponds to FIG. FIG. 22 is a diagram showing a third example of the embodiment, and corresponds to FIG. FIG. 23 is a diagram showing a third example of the embodiment, and corresponds to FIG. FIG. 24 is a diagram showing a fourth example of the embodiment, and corresponds to FIG. 15. In FIG. FIG. 25 is a diagram showing a fourth example of the embodiment, and corresponds to FIG. FIG. 26 is a schematic diagram showing a building to which a conventional wiring structure for solar cell panels is applied. FIG. 27 is a cross-sectional view corresponding to the cross section taken along line FF in FIG.

[First Example of Embodiment]
A first example of the embodiment will be described with reference to FIGS.

[Overall structure of the building]
1 shows a building 2, part of whose outer wall is made up of solar cell panels 1 wired using the wiring structure of this embodiment. The building 2 is equipped with a photovoltaic power generation system 3 including the solar cell panels 1, and the outer wall is made up of a curtain wall 4 equipped with the solar cell panels 1.

In the following description, the out-of-plane direction refers to the depth direction (prospect direction) when viewing the solar cell panel 1 (curtain wall 4) from the front. The in-plane direction refers to the direction perpendicular to the out-of-plane direction (prospect direction). The outdoor side in the out-of-plane direction is simply referred to as the "outdoor side," and the indoor side in the out-of-plane direction is simply referred to as the "indoor side." The left-right direction (horizontal direction) and the up-down direction (vertical direction) refer to the respective directions when viewing the solar cell panel 1 from the front. Furthermore, one side in the left-right direction refers to the left side in Figures 1, 3, 5-8, 10, 11, and 13-19, and the other side in the left-right direction refers to the right side in Figures 1, 3, 5-8, 10, 11, and 13-19.

The solar power generation system 3 is composed of multiple solar cell panels 1, various cables 5 to 7, a power conditioner 8, a storage battery 9, etc.

The solar panel 1 generates electricity by converting solar light energy into electrical energy. The electricity generated by the solar panel 1 is then collected through various cables 5-7 into a power conditioner 8 installed in an equipment room or the like on the upper floors of the building 2. The electricity collected in the power conditioner 8 is then converted from DC to AC for use. The electricity may also be stored in a storage battery 9. In this example, the power conditioner 8 and storage battery 9 are installed on the top floor of the building 2, but when implementing the present invention, the installation location of the power conditioner and storage battery is not particularly limited, and may be on the lower floors or in the basement of the building.

The output voltage of the solar cell group 10 is set lower than the rated input voltage of the power conditioner. For this reason, in this example, multiple solar cell panels 1 (several to a dozen or so) are connected in series to form the solar cell group 10 to match the rated input voltage of the power conditioner 8. Each solar cell group 10 is then connected to the power conditioner 8 by a dedicated output cable 5. Note that Figures 1 and 16 show an example in which one solar cell group 10 is made up of 16 solar cell panels 1. Also, in Figure 1, solar cell panels 1 belonging to the same solar cell group 10 are given common symbols from 1G to 5G.

Multiple solar cell panels 1 belonging to the same solar cell group 10 are connected in series with each other, and depending on the arrangement direction of the two solar cell panels 1 connected in series, the wiring structure of the solar cell panel 1 can be broadly divided into the following two types.

The first wiring structure is a wiring structure for two solar cell panels 1 arranged side by side in the left-right direction.
Two solar cell panels 1 arranged adjacently in the left-right direction are connected in series to each other by using an intermediate connection cable 6 arranged so as to span the two solar cell panels 1 in the left-right direction.

The second wiring structure is a wiring structure for two solar cell panels 1 arranged side by side in the vertical direction.
Two solar cell panels 1 arranged side by side in the vertical direction with a glass panel 13 (described later) in between are connected in series to each other using an end connection cable 7 arranged so as to be hung across the two solar cell panels 1 in the vertical direction.

In this example, the type of cable used for connection and the wiring structure differ depending on the arrangement direction of the two solar cell panels 1 connected in series. However, in both wiring structures, the wiring structure is designed to allow maintenance work on the solar power generation system 3 to be performed from outdoors. For this reason, in this example, the intermediate connection cable 6 and the end connection cable 7 each correspond to the connection cables described in the claims. Note that when implementing the present invention, it is also possible to implement only either the first wiring structure or the second wiring structure, depending on the number and arrangement direction of the solar cell panels that make up the solar cell group.

Below, we will explain the structure of the curtain wall 4 that forms the outer wall of the building 2, and then provide details of the wiring structure of the solar panel 1 that uses each of the intermediate connection cables 6 and the end connection cables 7.

[Overall structure of curtain wall]
The curtain wall 4 in this example is a mullion-type curtain wall, and includes a plurality of mullions 11, 11a, a plurality of lattice beams 12, a plurality of glass panels 13, and a plurality of solar cell panels 1. In this example, the mullions 11, 11a correspond to the vertical frames described in the claims.

The mullions 11, 11a are arranged with their longitudinal axes facing up and down and are fixed to the outdoor side of the main body 15 via brackets 14. The transom 12 is arranged with its longitudinal axis facing left and right and is connected to span between adjacent mullions 11 (11a) in the left and right direction. The glass panel 13 is set into an opening surrounded on all four sides by the mullions 11 (11a) and transom 12, and forms the window section of the building 2. The solar cell panel 1 is set into an opening surrounded on all four sides by the mullions 11 (11a) and transom 12, and forms a wall section of the building 2 called the spandrel section or waist section.

For this reason, in the building 2 of this example, the glass panels 13 and solar cell panels 1 are arranged continuously in the left-right direction, with the mullions 11 sandwiched between them, and the glass panels 13 and solar cell panels 1 are arranged alternately in the up-down direction, with the transoms 12 sandwiched between them.

The specific structure of each component of the curtain wall 4 will be explained below with reference to Figures 2 to 15.

<Mullet>
The mullions 11 and 11a have different structures due to differences in their placement positions in the building 2. That is, the mullion 11 is placed in the middle of the building 2 in the left-right direction, with the glass panel 13 and the solar cell panel 1 placed on both left-right sides, while the mullion 11a is placed at the end of the building 2 in the left-right direction, with the glass panel 13 and the solar cell panel 1 placed only on one side in the left-right direction (one side or the other side in the left-right direction).

As shown in Figures 3 and 5, the mullion 11 is composed of a mullion body 16, decorative material 17, glass battens (not shown), and PV battens 18a and 18b, each made from extruded aluminum alloy material.

In contrast, as shown in Figures 6 and 7, the mullion 11a is composed of a mullion body 16, decorative material 17, a glass ledge (not shown), either a PV ledge 18a or a PV ledge 18b, and either a cover material 19a or a cover material 19b, all of which are made from extruded aluminum alloy material. The mullion 11a does not have two types of PV ledges 18a, 18b, but instead has one type of PV ledge 18a (or 18b) and one type of cover material 19a (or 19b).

The upright body 16, a part common to the uprights 11 and 11a, is fixed to the exterior side of the frame 15 and integrally comprises a rectangular pillar portion 20, a flat plate portion 21, and a connecting plate portion 22. In this example, the upright body 16 corresponds to the vertical frame body described in the claims.

The rectangular column portion 20 has a hollow rectangular column shape and is provided at the indoor end of the upright body 16. The flat plate portion 21 has a flat plate shape and is arranged with its plate thickness facing out of the plane. The flat plate portion 21 is provided at the outdoor end of the upright body 16. The connecting plate portion 22 has a flat plate shape and is arranged with its plate thickness facing left and right. The connecting plate portion 22 is provided at the middle portion of the upright body 16 in the out-of-plane direction and connects the rectangular column portion 20 and the flat plate portion 21 in the out-of-plane direction. Specifically, the connecting plate portion 22 connects the rectangular column portion 20 and the flat plate portion 21 at their left and right middle portions. In the illustrated example, the connecting plate portion 22 is not located in the left-right center between the rectangular column portion 20 and the flat plate portion 21, but is located slightly offset to one side in the left-right direction (the left side in Figure 5). Each of the glass panel 13 and the solar panel 1 is disposed between two connecting plate portions 22 arranged opposite each other in the left-right direction.

The decorative material 17, a part common to the uprights 11 and 11a, is fixed to the outdoor side of the flat plate portion 21 that constitutes the upright main body 16 using bolts 23 and nuts 24. As a result, the decorative material 17 covers the upright main body 16 from the outdoor side.

The decorative material 17 comprises a pair of side panels 25a, 25b arranged parallel to each other and spaced apart in the left-right direction, a bottom panel 26 connecting the indoor-side portions of the pair of side panels 25a, 25b, a pair of fins 27a, 27b extending in the left-right direction from the out-of-plane middle portions of each of the pair of side panels 25a, 25b so as to approach each other, and a lid 28 attached so as to span the pair of fins 27a, 27b.

A dovetail groove is provided on the indoor surface of the bottom plate portion 26. The head of the bolt 23 engages in this dovetail groove.

In this example, the decorative material 17 is surrounded on all four sides by a pair of side plate portions 25a, 25b, a bottom plate portion 26, a pair of fin portions 27a, 27b, and a lid portion 28, and is provided with a cable accommodating portion 29 extending vertically to accommodate the middle portion of the intermediate connecting cable 6 or the middle portion of the end connecting cable 7.

The lid portion 28 has a generally crank-shaped cross section and covers the opening 30 of the cable housing portion 29, which is located between the pair of fin portions 27a, 27b.

The end of the lid portion 28 on the other left-right side (the right side in Figure 5) is fixed from the outside to the fin portion 27b on the other left-right side with a lid screw 31. Furthermore, the end of the lid portion 28 on one left-right side engages out-of-plane with the fin portion 27a on one left-right side.

The lid portion 28 can be removed from the pair of fin portions 27a, 27b to the outdoors by removing the lid screws 31. This allows the lid portion 28 to open and close the opening 30 leading to the cable housing portion 29.

The mullions 11 and 11a hold the vertical sides of the glass panel 13 and the solar panel 1. To this end, the mullion 11 has a glass ridge and two types of PV ridges 18a and 18b. The mullion 11a also has a glass ridge and one type of PV ridge 18a (or 18b).

Each of the PV ridges 18a, 18b has a generally L-shaped cross section and is engaged so as to span between the outdoor portion of the rectangular column portion 20 and the connecting plate portion 22. When the PV ridge 18a is engaged with one left-right side of the upright body 16, a holding groove 32a is formed in the area surrounded on three sides by the outdoor portion of the PV ridge 18a, the outdoor half of the connecting plate portion 22, and one left-right side of the flat plate portion 21. The holding groove 32a holds the vertical edge of the solar cell panel 1 on the other left-right side. Conversely, when the PV ridge 18b is engaged with the other left-right side of the upright body 16, a holding groove 32b is formed in the area surrounded on three sides by the outdoor portion of the PV ridge 18b, the outdoor half of the connecting plate portion 22, and the other left-right side of the flat plate portion 21. The holding groove 32b holds the vertical edge of one of the left and right sides of the solar cell panel 1.

As shown in Figure 6, the upright body 16 constituting the upright 11a located at one end of the left-right side of the building 2 has a PV ledge 18b engaged on the other left-right side, and a cover material 19a engaged on one left-right side. In contrast, as shown in Figure 7, the upright body 16 constituting the upright 11a located at the other end of the left-right side of the building 2 has a PV ledge 18a engaged on one left-right side, and a cover material 19b engaged on the other left-right side.

In this example, the middle portion of the intermediate connection cable 6 is disposed in the cable housing portion 29 of the upright 11, and both sides of the intermediate connection cable 6 are disposed indoors relative to the panel body 39 (described below) that constitutes the solar panel 1. Therefore, multiple through-holes 33a-36b and notches 58a, 58b are formed in the upright 11. In this example, the through-holes 33a-36b and notches 58a, 58b correspond to the insertion portions described in the claims.

Specifically, first through-holes 33a, 33b that penetrate the bottom plate portion 26 in the out-of-plane direction are formed at height positions on the bottom plate portion 26 that constitute the decorative material 17, corresponding to the upper and lower portions of the solar cell panel 1, respectively.

In addition, second through-holes 34a and 34b are formed in the flat plate portion 21 that constitutes the upright body 16, in the portions that face the first through-holes 33a and 33b in the out-of-plane direction, respectively, and penetrate the flat plate portion 21 in the out-of-plane direction.

In addition, a third through-hole 35 that penetrates the connecting plate portion 22 in the left-right direction is formed at approximately the same height as the first through-hole 33b and second through-hole 34b, which are formed at a height corresponding to the lower portion of the solar panel 1, in the connecting plate portion 22 that constitutes the upright main body 16.

Furthermore, in the PV flange 18a engaged on one side of the upright body 16 in the left-right direction, a fourth through-hole 36a penetrating the PV flange 18a in the left-right direction and a notch 58a penetrating the PV flange 18a in the out-of-plane direction are formed at approximately the same height as the third through-hole 35. Furthermore, in the PV flange 18b engaged on the other side of the upright body 16 in the left-right direction, a fourth through-hole 36b penetrating the PV flange 18b in the left-right direction and a notch 58b penetrating the PV flange 18b in the out-of-plane direction are formed at approximately the same height as the first through-hole 33a and second through-hole 34a formed at a height corresponding to the upper portion of the solar cell panel 1.

In this example, the first through holes 33a, 33b, the second through holes 34a, 34b, and the third through hole 35 are each configured as a long hole that is long in the vertical direction. In contrast, the fourth through holes 36a, 36b are each configured as a round hole. In addition, a grommet 37 is attached to the inner peripheral edge of each of the fourth through holes 36a, 36b.

Furthermore, in this example, the middle portion of the end connection cable 7 is disposed in the cable housing portion 29 of the upright 11a, and both sides of the end connection cable 7 are disposed indoors relative to the panel body 39 (described below) that constitutes the solar panel 1. In order to do this, the upright 11a is formed with the first through holes 33a, 33b, the second through holes 34a, 34b, the third through hole 35, and the fourth through hole 36a (or 36b), as well as the notch 58a (or 58b), just like the upright 11. However, in the uprights 11a located at the left and right ends of the building 2, the end connection cable 7 is not inserted through all of the first through holes 33a, 33b through the fourth through hole 36a (or 36b), but rather is not inserted through some of the through holes, as described below.

In this example, the first through hole 33a, second through hole 34a, and fourth through hole 36b are all approximately the same height position, and the first through hole 33b, second through hole 34b, third through hole 35, and fourth through hole 36a are all approximately the same height position. However, when implementing this invention, the height positions of the various through holes can be changed as appropriate. For example, the height positions of the first through hole 33a and second through hole 34a located on the upper side can be lower than the height position of the fourth through hole 36a, and the height positions of the first through hole 33b and second through hole 34b located on the lower side can be higher than the height positions of the third through hole 35 and fourth through hole 36b, respectively.

<Mu-e>
The transom 12 is made of an extruded aluminum alloy material and is composed of a transom body 59 and a pair of flanges 60a, 60b.

Of the ridges 60a, 60b, one ridge 60a is engaged with the upper portion of the outdoor end of the transom body 59. In contrast, the other ridge 60b is engaged with the lower portion of the outdoor end of the transom body 59.

A holding groove 61a is formed in the upper portion of the transom 12, which is surrounded on three sides by the transom body 59 and the ledge 60a. The holding groove 61a holds the bottom edges of the glass panel 13 and the solar panel 1.

A holding groove 61b is formed in the lower portion of the transom 12, which is surrounded on three sides by the transom body 59 and the ledge 60b. The holding groove 61b holds the upper edges of the glass panel 13 and the solar panel 1.

<Glass panel>
In this embodiment, the glass panel 13 is a double-glazed glass panel made up of two glass plates 38, and is set into an area surrounded on all four sides by the mullions 11 and the transom 12. The glass panel 13 constitutes a window portion of the building 2, and is provided in a portion corresponding to the interior space.

<Solar panel>
The solar cell panel 1 generates electricity by converting solar light energy into electrical energy, and is set up in an area surrounded on all four sides by mullions 11 and crossbeams 12. In this example, the solar cell panel 1 forms the wall of the building 2 and is provided in the area corresponding to the attic space and underfloor space. However, when implementing the present invention, a see-through type solar cell panel can also be used to form the window portion of the building with the solar cell panel.

As shown in the schematic diagram of Figure 15, the solar panel 1 has a panel body 39, a positive terminal 40, a negative terminal 41, a positive current collecting cable 42, and a negative current collecting cable 43. The solar panel 1 in this example has one positive terminal 40, one negative terminal 41, one positive current collecting cable 42, and one negative current collecting cable 43.

The panel body 39 has a light-transmitting front panel 44 such as a glass plate located on the outdoor side (light-receiving side), a back panel 45 such as a glass plate located on the indoor side (back side), and multiple solar cells (not shown) sealed with a transparent filler between the front panel 44 and back panel 45.

In this example, the outdoor surface (front surface) of the panel body 39 is arranged on the same plane as the outdoor surface of the glass panel 13. In addition, the outdoor surfaces of the panel bodies 39 arranged in the left-right direction are also arranged on the same plane.

The multiple solar cell modules 46 are connected in series or parallel to each other to form a solar cell module 46. The solar cell module 46 is constructed by connecting multiple solar cell modules 46 adjacent to each other in the left-right direction. In this example, the panel body 39 is equipped with only one solar cell module 46. However, when implementing the present invention, the panel body can also be equipped with multiple solar cell modules, as in the third and fourth examples of the embodiment described below.

The positive terminal 40 and negative terminal 41 are provided on the indoor surface of the panel body 39, i.e., on the back surface of the back panel 45. The positive terminal 40 and negative terminal 41 are electrically connected to both ends of the solar cell module 46, which is a circuit formed by connecting multiple solar cell cells together. Therefore, one positive terminal 40 and one negative terminal 41 are provided for each solar cell module 46.

The positive terminal 40 is located at the upper portion of the other left-right side of the panel body 39 and is housed in a terminal box 47a. The negative terminal 41 is located at the upper portion of one left-right side of the panel body 39 and is housed in a terminal box 47b.

One end of the positive current collecting cable 42 is directly connected to the positive terminal 40. The other end of the positive current collecting cable 42 is provided with a first connector 48. The positive current collecting cable 42 is pulled out from the terminal box 47a toward the center of the panel body 39 in the left-right direction. Note that in Figures 15 to 19, the first connector 48 is represented by a circle (◯).

One end of the negative current collecting cable 43 is directly connected to the negative terminal 41. The other end of the negative current collecting cable 43 is provided with a second connector 49. The second connector 49 can only be connected to the first connector 48. The negative current collecting cable 43 is pulled out from the terminal box 47b toward the center of the panel body 39 in the left-right direction. Note that in Figures 15 to 19, the second connector 49 is represented by a triangle mark (△).

The curtain wall 4 in this example further includes an inner wall material 56 on the indoor side of the solar cell panel 1. The inner wall material 56 is provided between the rectangular pillar portions 20 of the uprights 11 (11a) that are arranged adjacent to each other in the left-right direction. Therefore, the positive terminal portion 40, negative terminal portion 41, positive current collecting cable 42, and negative current collecting cable 43 that make up the solar cell panel 1 are arranged in the space formed between the panel body 39 and the inner wall material 56.

<Solar panel wiring structure>
In this example, a plurality of solar cell panels 1 are connected in series to form a solar cell group 10. In the example shown in Figures 1 and 16, one solar cell group 10 is made up of 16 solar cell panels 1, and one entire wall surface of the building 2 is provided with five solar cell groups 10, numbered 1G to 5G.

Of the multiple solar cell panels 1 belonging to the same solar cell group 10, two solar cell panels 1 arranged adjacent to each other in the left-right direction are connected in series to each other using intermediate connection cables 6. Furthermore, of the multiple solar cell panels 1 belonging to the same solar cell group 10, two solar cell panels 1 arranged adjacent to each other in the up-down direction with a glass panel 13 in between are connected in series to each other using end connection cables 7.

For this reason, a second connector 49 is provided at one end of the intermediate connection cable 6 that connects to the positive current collecting cable 42, and a first connector 48 is provided at the other end that connects to the negative current collecting cable 43. Furthermore, a second connector 49 is provided at one end of the end connection cable 7 that connects to the positive current collecting cable 42, and a first connector 48 is provided at the other end that connects to the negative current collecting cable 43.

<<First Wiring Structure>>
In this example, both ends of the intermediate connection cable 6 connecting two solar cell panels 1 arranged adjacent to each other horizontally are arranged indoors relative to the indoor surface of the panel body 39, while the middle part of the intermediate connection cable 6 is arranged outdoors relative to the outdoor surface of the panel body 39.

For this reason, as shown in Figures 5 and 8, the intermediate connection cable 6 is inserted through the through holes 33a-36b and notches 58a, 58b provided in the upright 11.

Specifically, the middle portion of the intermediate connection cable 6 is housed in the cable housing 29 of the upright 11 with its longitudinal direction facing up and down. The upper portion of the intermediate connection cable 6 is bent approximately 90 degrees indoors relative to the middle portion of the intermediate connection cable 6, and inserted out-of-plane through the first through hole 33a, the second through hole 34a, and the notch 58b. It is also bent approximately 90 degrees toward the other left-right side, and inserted left-right through the fourth through hole 36b. The lower portion of the intermediate connection cable 6 is bent approximately 90 degrees indoors relative to the middle portion of the intermediate connection cable 6, and inserted out-of-plane through the first through hole 33b and the second through hole 34b. It is also bent approximately 90 degrees toward one left-right side, and inserted left-right through the third through hole 35, the notch 58a, and the fourth through hole 36a.

As a result, the upper portion of the intermediate connection cable 6 is inserted on the other left-right side of the upright 11 and closer to the interior than the panel main body 39. Furthermore, the lower portion of the intermediate connection cable 6 is inserted on one left-right side of the upright 11 and closer to the interior than the panel main body 39. Furthermore, a grommet 37 is provided between the outer surface of the intermediate connection cable 6 and the fourth through holes 36a, 36b.

In this example, by disposing the intermediate connection cable 6 as described above, the second connector 49 provided at one end of the intermediate connection cable 6 is connected to the first connector 48 provided on the positive current collecting cable 42 of one of the two solar cell panels 1 arranged adjacently in the horizontal direction. Furthermore, the first connector 48 provided at the other end of the intermediate connection cable 6 is connected to the second connector 49 provided on the negative current collecting cable 43 of the other of the two solar cell panels 1 arranged adjacently in the horizontal direction.

In this example, as shown in Figures 16 to 19, the left-right arrangement of the positive terminal 40 and negative terminal 41 is the same for the solar cell panels 1 forming the wall portions of the odd-numbered floors and the solar cell panels 1 forming the wall portions of the even-numbered floors. Therefore, on the even-numbered floors, the positive terminal 40 and negative terminal 41 located close to each other in the left-right direction are connected by an intermediate connecting cable 6, whereas on the odd-numbered floors, the positive terminal 40 and negative terminal 41 located farther apart in the left-right direction are connected by an intermediate connecting cable 6. Note that in Figures 16 to 19, the circuits formed by the various cables 6 (50, 51), 7 (53, 54, 55), 42, and 43 are shown by solid lines, and the circuit formed by the connection between the first connector 48 and the second connector 49 is shown by dashed lines.

On even-numbered floors, the second connector 49 provided at one end of the intermediate connection cable 6 is connected to the first connector 48 provided on the positive current collecting cable 42 of the solar panel 1 on one side in the horizontal direction of the two solar panels 1 connected by the intermediate connection cable 6. Furthermore, the first connector 48 provided at the other end of the intermediate connection cable 6 is connected to the second connector 49 provided on the negative current collecting cable 43 of the solar panel 1 on the other side in the horizontal direction of the two solar panels 1 connected by the intermediate connection cable 6.

In contrast, on odd-numbered floors, the second connector 49 provided at one end of the intermediate connection cable 6 is connected to the first connector 48 provided on the positive current collecting cable 42 of the solar panel 1 on the other left-right side of the two solar panels 1 connected by the intermediate connection cable 6. Also, the first connector 48 provided at the other end of the intermediate connection cable 6 is connected to the second connector 49 provided on the negative current collecting cable 43 of the solar panel 1 on one left-right side of the two solar panels 1 connected by the intermediate connection cable 6.

As described above, in this example, on both even and odd floors, two adjacent solar panels 1 arranged side by side in the left-right direction are connected in series to each other using an intermediate connection cable 6, the middle portion of which is located outside the panel body 39. The intermediate connection cable 6 can be attached to the upright 11 by passing it through each of the through holes 33a-36b and notches 58a, 58b before the upright 11 is fixed to the frame 15.

In this example, the intermediate connection cable 6 is composed of two cables: a first intermediate connection cable 50 and a second intermediate connection cable 51.

One end of the first intermediate connecting cable 50 constitutes one end of the intermediate connecting cable 6. Therefore, one end of the first intermediate connecting cable 50 is provided with a second connector 49, and the other end of the first intermediate connecting cable 50 is provided with a first connector 48.

In contrast, the other end of the second intermediate connecting cable 51 constitutes the other end of the intermediate connecting cable 6. Therefore, the other end of the second intermediate connecting cable 51 is provided with a first connector 48, and one end of the second intermediate connecting cable 51 is provided with a second connector 49.

The intermediate connection cable 6 is then constructed by connecting the first connector 48 provided at the other end of the first intermediate connection cable 50 with the second connector 49 provided at one end of the second intermediate connection cable 51. In this example, the connector connection portion 52 between the first connector 48 of the first intermediate connection cable 50 and the second connector 49 of the second intermediate connection cable 51 is housed in the cable housing portion 29. Therefore, by removing the cover portion 28 from the upright 11, the connector connection portion 52 of the intermediate connection cable 6 can be accessed from outside.

<<Second Wiring Structure>>
In this example, both ends of the end connection cable 7 connecting two solar cell panels 1 arranged side by side in the vertical direction across the glass panel 13 are arranged indoors relative to the indoor face of the panel body 39, while the middle part of the end connection cable 7 is arranged outdoors relative to the outdoor face of the panel body 39.

In the upright 11a located at one end of the building 2 in the left-right direction, as shown in Figure 6, the end connection cable 7 is inserted and arranged through the first through-hole 33a, second through-hole 34a, notch 58b, and fourth through-hole 36b provided in the upright 11a.

Specifically, the middle portion of the end connection cable 7 is housed in the cable housing 29 with its longitudinal direction facing up and down. The upper portion of the end connection cable 7 is then bent approximately 90 degrees indoors relative to the middle portion of the end connection cable 7, allowing it to pass out of the plane through the first through-hole 33a, second through-hole 34a, and notch 58b, which are provided at a height corresponding to the upper portion of the upper solar panel 1 of the two solar cell panels 1 connected via the end connection cable 7. The cable is then further bent approximately 90 degrees to the other left or right, allowing it to pass through the fourth through-hole 36b in the left or right direction. Additionally, the lower portion of the end connection cable 7 is bent approximately 90 degrees indoors relative to the middle portion of the end connection cable 7, allowing it to pass out of the plane through the first through-hole 33a, second through-hole 34a, and notch 58b, which are provided at a height corresponding to the upper portion of the lower solar panel 1 of the two solar cell panels 1 connected via the end connection cable 7. It is then bent further toward the other left-right side by approximately 90 degrees, allowing the fourth through-hole 36b to pass through in the left-right direction.

As a result, the upper and lower portions of the end connection cable 7 are inserted laterally to the other side of the upright 11a located at one end of the building 2, and further indoors than the panel body 39. In addition, a grommet 37 (see Figure 5, etc.) is provided between the outer surface of the end connection cable 7 and the fourth through-hole 36b.

In this example, by arranging the end connection cable 7 as described above, the second connector 49 provided at one end of the end connection cable 7 is connected to the first connector 48 provided on the positive current collecting cable 42 of the lower solar panel 1 of the two solar cell panels 1 connected by the end connection cable 7. Furthermore, the first connector 48 provided at the other end of the end connection cable 7 is connected to the second connector 49 provided on the negative current collecting cable 43 of the upper solar cell panel 1 of the two solar cell panels 1 connected by the end connection cable 7. As a result, the two solar cell panels 1 arranged side by side vertically across the glass panel 13 are connected in series to each other using the end connection cable 7, whose middle portion is located closer to the exterior than the panel body 39. The end connection cable 7 can be attached to the upright 11a by passing it through the holes 33a, 34a, 36b and notch 58b before the upright 11a, located at one end of the left or right side of the building 2, is fixed to the main body 15.

In contrast, in the upright 11a located at the other end of the building 2 in the left-right direction, as shown in Figure 7, the end connection cable 7 is inserted and arranged through the first through-hole 33b, second through-hole 34b, third through-hole 35, notch 58a, and fourth through-hole 36a provided in the upright 11a.

Specifically, the middle portion of the end connection cable 7 is housed in the cable housing 29 with its longitudinal direction facing up and down. The upper portion of the end connection cable 7 is then bent approximately 90 degrees indoors relative to the middle portion of the end connection cable 7, allowing it to pass out of the plane through the first through-hole 33b and second through-hole 34b, which are provided at a height corresponding to the lower portion of the upper solar panel 1 of the two solar cell panels 1 connected via the end connection cable 7. The upper portion is then bent approximately 90 degrees to one side in the left-right direction, allowing it to pass through the third through-hole 35, notch 58a, and fourth through-hole 36a. The lower portion of the end connection cable 7 is bent approximately 90 degrees indoors relative to the middle portion of the end connection cable 7, and is inserted out of the plane through the first through-hole 33b and second through-hole 34b, which are provided at a height corresponding to the lower portion of the lower solar panel 1 of the two solar cell panels 1 connected via the end connection cable 7. It is then bent further approximately 90 degrees to one side in the left-right direction, and is inserted through the third through-hole 35, notch 58a, and fourth through-hole 36a.

As a result, the upper and lower parts of the end connection cable 7 are inserted on one side in the left-right direction of the upright 11a located at the other end of the building 2 in the left-right direction, and on the indoor side of the panel body 39. In addition, a grommet 37 (see Figure 5, etc.) is provided between the outer peripheral surface of the end connection cable 7 and the fourth through-hole 36a.

In this example, by arranging the end connection cable 7 as described above, the second connector 49 provided at one end of the end connection cable 7 is connected to the first connector 48 provided on the positive current collecting cable 42 of the lower solar panel 1 of the two solar cell panels 1 connected by the end connection cable 7. Furthermore, the first connector 48 provided at the other end of the end connection cable 7 is connected to the second connector 49 provided on the negative current collecting cable 43 of the upper solar cell panel 1 of the two solar cell panels 1 connected by the end connection cable 7. As a result, the two solar cell panels 1 arranged side by side vertically across the glass panel 13 are connected in series to each other using the end connection cable 7, whose middle portion is located closer to the exterior than the panel body 39. The end connection cable 7 can be attached to the upright 11a by passing it through the holes 33b, 34b, 35, 36a and notch 58a before the upright 11a located at the other end of the building 2 in the left-right direction is fixed to the main body 15.

In this example, the end connection cable 7 is composed of three cables: a first end connection cable 53, a second end connection cable 54, and a relay cable 55.

One end of the first end connection cable 53 constitutes one end of the end connection cable 7. Therefore, one end of the first end connection cable 53 is provided with a second connector 49, and the other end of the first end connection cable 53 is provided with a first connector 48.

In contrast, the other end of the second end connection cable 54 constitutes the other end of the end connection cable 7. Therefore, the other end of the second end connection cable 54 is provided with a first connector 48, and one end of the second end connection cable 54 is provided with a second connector 49.

The relay cable 55 also has a second connector 49 at one end and a first connector 48 at the other end.

The end connection cable 7 is constructed by connecting the first connector 48 provided at the other end of the first end connection cable 53 to the second connector 49 provided at one end of the relay cable 55, and by connecting the second connector 49 provided at one end of the second end connection cable 54 to the first connector 48 provided at the other end of the relay cable 55. In this example, the connector connection portion 52a between the first connector 48 of the first end connection cable 53 and the second connector 49 of the relay cable 55, and the connector connection portion 52b between the second connector 49 of the second end connection cable 54 and the first connector 48 of the relay cable 55 are housed in the cable housing portion 29. Therefore, by removing the cover portion 28 from the upright 11a, the connector connections 52a and 52b of the end connection cable 7 can be accessed from outside.

In this example, the positions and sizes of the through holes 33a-36b and notches 58a, 58b are set to prevent damage to the intermediate connection cable 6 and the end connection cable 7 at each bending point, ensuring a relatively large bending radius for the intermediate connection cable 6 and the end connection cable 7.

In this example, each solar cell group 10 is connected to a power conditioner 8 via an output cable 5. Specifically, of the multiple solar cell panels 1 that make up the solar cell group 10, the positive terminal 40 and negative terminal 41 of two solar cell panels 1 located at both ends are connected via output cables 5 to a power conditioner 8 installed on the top floor of building 2.

In addition, the output cable 5 is housed in a cable housing 29 provided in the uprights 11 and 11a. Therefore, the cross-sectional area of the cable housing 29 is determined based on the number and thickness of the various cables 5 to 7 housed in the cable housing 29. The output cable 5 is led from the cable housing 29 in the uprights 11 and 11a through the beams 57 of the building 2 to the power conditioner 8 installed on the top floor.

According to the building 2 having the wiring structure of the solar cell panel 1 as described above, maintenance work on the solar power generation system 3 can be performed from the outside.
That is, in this example, multiple solar cell panels 1 constituting the same solar cell group 10 are connected in series with each other using intermediate connection cables 6 and end connection cables 7, each of whose intermediate portions are disposed outdoors relative to the panel body 39. This allows a maintenance worker to access the intermediate portions of the intermediate connection cables 6 and end connection cables 7 from outdoors using a gondola or the like, and inspect the electrical status of these intermediate connection cables 6 and end connection cables 7. This allows the presence or absence of a malfunction in the solar cell panel 1 to be confirmed from outdoors. As a result, maintenance work on the solar power generation system can be performed from outdoors.

This eliminates time constraints on maintenance work, reducing the number of days required for maintenance work. Furthermore, because maintenance work can be performed outdoors, it avoids damaging interior materials such as flooring and interior walls. Furthermore, because work can be performed outdoors, work efficiency is improved compared to performing maintenance work in small spaces such as the attic or underfloor space. Furthermore, it is easy to determine whether each cable is good or bad, making it easy to identify which solar panel 1 in the building has a malfunction. Furthermore, in this example, some of the various cables 5-7 that make up the solar power generation system 3 can be housed in the cable housing 29 of the uprights 11, 11a, eliminating the need to route various cables indoors, which is advantageous in terms of ensuring a larger indoor space.

In addition, in this example, the connector connection portion 52 of the intermediate connection cable 6 and the connector connection portions 52a, 52b of the end connection cable 7 are housed in the cable housing portion 29. As a result, the first connector 48 and second connector 49 that make up the connector connection portions 52, 52a, 52b can be disconnected, and inspection equipment can be connected to these first connector 48 and second connector 49 from the outdoors. This improves the efficiency of maintenance work on the solar panel 1. Furthermore, inspection performance can be improved compared to when non-contact inspection equipment is used. Furthermore, the ease of wiring the intermediate connection cable 6 and end connection cable 7 can also be improved.

In addition, in this example, the intermediate connection cable 6 and end connection cable 7 housed in the cable housing section 29 can be easily accessed by removing the cover section 28 from the upright 11. This improves the efficiency of maintenance work while maintaining the aesthetic design of the building 2's exterior.

[Second Example of Embodiment]
A second example of the embodiment will be described with reference to FIGS. 20 and 21. FIG.

This example is a modification of the first embodiment, in which the structure of the solar cell panel 1a has been changed from that of the first embodiment.

The solar cell panel 1a has only one solar cell module 46a. The solar cell module 46a is composed of multiple solar cells arranged adjacent to each other in the vertical direction and connected in series. The solar cell panel 1a has one positive terminal 40 and one negative terminal 41 on the indoor surface of the panel body 39. The positive terminal 40 is located at the upper part of one left-right side of the panel body 39, and the negative terminal 41 is located at the lower part of one left-right side of the panel body 39.

In this example, of the multiple solar cell panels 1a belonging to the same solar cell group 10, two solar cell panels 1a arranged adjacent to each other in the horizontal direction are connected in series to each other using intermediate connection cables 6. Also, of the multiple solar cell panels 1a belonging to the same solar cell group 10, two solar cell panels 1a arranged adjacent to each other in the vertical direction with a glass panel 13 in between are connected in series to each other using end connection cables 7.

In the case of the present example as described above, the positive terminal portion 40 and the negative terminal portion 41 can be arranged biased to one side in the left-right direction of the solar cell panel 1. This is advantageous in that the space between the solar cell panel 1 and the inner wall material 56 can be used for other purposes.
The other configurations and effects are the same as those of the first embodiment.

[Third Example of Embodiment]
A third example of the embodiment will be described with reference to FIGS. 22 and 23. FIG.

This example is a modification of the first embodiment, in which the structure of the solar cell panel 1b has been changed from that of the first embodiment.

The solar panel 1b has two solar cell modules 46. Therefore, the solar panel 1b has two positive terminals 40 and two negative terminals 41 on the indoor surface of the panel body 39. The positive terminals 40 are located at the upper and lower portions of the other left-right side of the panel body 39, and the negative terminals 41 are located at the upper and lower portions of one left-right side of the panel body 39.

In this example, of the two positive terminals 40 and two negative terminals 41 provided on the solar panel 1b, one pair of positive terminals 40 and negative terminals 41 arranged diagonally is directly connected to connect the two solar cell modules 46 in series.

In this example, of the multiple solar cell panels 1b belonging to the same solar cell group 10, two solar cell panels 1b arranged adjacent to each other in the horizontal direction are connected in series to each other using intermediate connection cables 6. Also, of the multiple solar cell panels 1b belonging to the same solar cell group 10, two solar cell panels 1b arranged adjacent to each other in the vertical direction with a glass panel 13 in between are connected in series to each other using end connection cables 7.

In the case of this example as described above, since one solar cell panel 1b is provided with two solar cell modules 46, the output per solar cell panel 1b can be increased.
The other configurations and effects are the same as those of the first embodiment.

[Fourth Example of Embodiment]
A fourth example of the embodiment will be described with reference to FIGS. 24 and 25. FIG.

This example is a modification of the second embodiment, in which the structure of the solar cell panel 1c has been changed from that of the second embodiment.

The solar cell panel 1c has two solar cell modules 46a. Therefore, the solar cell panel 1c has two positive terminals 40 and two negative terminals 41 on the indoor surface of the panel body 39. The positive terminals 40 are located on the upper portions of both left and right sides of the panel body 39, and the negative terminals 41 are located on the lower portions of both left and right sides of the panel body 39.

In this example, of the two positive terminals 40 and two negative terminals 41 provided on the solar panel 1c, one pair of positive terminals 40 and negative terminals 41 arranged diagonally is directly connected to connect the two solar cell modules 46a in series.

In this example, of the multiple solar cell panels 1c belonging to the same solar cell group 10, two solar cell panels 1c arranged adjacent to each other in the horizontal direction are connected in series to each other using intermediate connection cables 6. Also, of the multiple solar cell panels 1c belonging to the same solar cell group 10, two solar cell panels 1c arranged adjacent to each other in the vertical direction with a glass panel 13 in between are connected in series to each other using end connection cables 7.

In the case of this example as described above, similarly to the third example of the embodiment, the output per solar cell panel 1c can be increased.
The other configurations and effects are the same as those of the first and second embodiments.

The above describes an embodiment of the present invention, but the present invention is not limited to this and can be modified as appropriate without departing from the technical concept of the invention. Furthermore, when implementing the present invention, the structures of each example embodiment can be combined as appropriate.

The solar cell panel wiring structure of the present invention is not limited to solar cell panels that make up the outer walls of buildings, but can also be applied to the wiring structure of solar cell panels that make up the outer walls of other structures. Furthermore, when implementing the present invention, the structure of the mullions, which correspond to the vertical frames, is not limited to the structure in the embodiment and can be modified as appropriate. Furthermore, when implementing the present invention, the connection cable is not limited to a structure in which multiple cables are connected by connector connections, but can also be constructed from a single cable. Furthermore, when the connection cable is constructed from multiple cables, the number of cables is not limited to the number described in the embodiment and can be modified as appropriate.

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c Solar cell panel 2 Building 3 Solar power generation system 4 Curtain wall 5 Output cable 6 Intermediate connection cable 7 End connection cable 8 Power conditioner 9 Storage battery 10 Solar cell group 11, 11a Upright 12 Gable 13 Glass panel 14 Bracket 15 Frame 16 Upright body 17 Decorative material 18a, 18b PV batten 19a, 19b Cover material 20 Square column portion 21 Flat plate portion 22 Connecting plate portion 23 Bolt 24 Nut 25a, 25b Side plate portion 26 Bottom plate portion 27a, 27b Fin portion 28 Lid portion 29 Cable accommodation portion 30 Opening 31 Lid screw 32a, 32b Retaining groove 33a, 33b First through-hole 34a, 34b Second through-hole 35 Third through-hole 36a, 36b Fourth through-hole 37 Grommet 38 Glass plate 39 Panel body 40 Positive terminal portion 41 Negative terminal portion 42 Positive current collecting cable 43 Negative current collecting cable 44 Front panel 45 Back panel 46, 46a Solar cell module 47a, 47b Terminal box 48 First connector 49 Second connector 50 First intermediate connection cable 51 Second intermediate connection cable 52, 52a, 52b Connector connection portion 53 First end connection cable 54 Second end connection cable 55 Relay cable 56 Inner wall material 57 Beam portion 58a, 58b Notch 59 Panel body 60a, 60b Push-up edge 61a, 61b Retaining groove 100 Solar cell panel 101 Building 102 Curtain wall 103 Floor slab 104 Bracket 105 Mullion 106 Gable 107 Glass panel 108 Panel body 109 Terminal box 110 Inner wall material 111 Positive current collecting cable 112 Negative current collecting cable 113 Output cable

Claims (9)

A wiring structure for solar cell panels that form the outer wall of a building,
The solar cell panel has a panel body including a plurality of solar cells, and a positive terminal portion and a negative terminal portion that are arranged on an indoor surface of the panel body and are electrically connected to the plurality of solar cells,
Of the two solar cell panels arranged side by side in a predetermined direction, the positive terminal portion of one of the solar cell panels and the negative terminal portion of the other solar cell panel are connected via a connection cable, at least a portion of which is arranged outdoors relative to the panel body.
Solar panel wiring structure. The connection cable is made up of at least two cables connected via a connector connecting portion disposed on the outdoor side of the panel body.
2. The wiring structure of a solar cell panel according to claim 1. the predetermined direction is the left-right direction,
a vertical frame having an insertion portion is disposed between the two solar cell panels in the left-right direction,
The connection cable is inserted through the insertion portion of the vertical frame.
2. The wiring structure of a solar cell panel according to claim 1. the predetermined direction is the up-down direction,
a glass panel is disposed between the two solar cell panels in the up-down direction, and a vertical frame having an insertion portion is disposed on one side of the two solar cell panels in the left-right direction;
The connection cable is inserted through the insertion portion of the vertical frame.
2. The wiring structure of a solar cell panel according to claim 1. The vertical frame has a cable housing portion extending in the vertical direction on the outdoor side of the panel body,
A portion of the connection cable is accommodated in the cable accommodating section.
5. The wiring structure of a solar cell panel according to claim 3 or 4. The vertical frame has a vertical frame body fixed to a skeleton and a decorative material fixed to the outdoor side of the vertical frame body,
The cable housing is provided in the decorative material.
6. The wiring structure of a solar cell panel according to claim 5. The solar panel wiring structure described in claim 5, wherein the vertical frame has a lid that can open and close the opening of the cable housing section. the solar panel further includes a positive current collecting cable connected to the positive terminal portion and a negative current collecting cable connected to the negative terminal portion;
Both ends of the connection cable are connected to the positive current collecting cable provided on one of the solar cell panels and the negative current collecting cable provided on the other of the solar cell panels, respectively.
2. The wiring structure of a solar cell panel according to claim 1. a first connector is provided at an end of the positive current collecting cable;
a second connector is provided at the end of the negative current collector cable;
One end of the connection cable, which is connected to the positive collector cable, is provided with the second connector, and the other end, which is connected to the negative collector cable, is provided with the first connector.
9. The wiring structure of a solar cell panel according to claim 8.