JP2012234850A - Solar cell module with terminal box, and terminal box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that the installation design of a band-like conductor is limited in a solar cell module with a terminal box not to cause twisting of the band-like conductor, and the problem that the connection design of a plurality of solar cells in the solar cell module is limited.SOLUTION: In the solar cell module with a terminal box, a terminal plate contains a first insert hole 46 and a second insert hole 47, with the first insert hole and the second insert hole arranged at the positions such that respective major sides cross each other at a right angle. A position where the band-like conductor passes a through hole 14 is assumed as a penetration position and a position just before passing of the band-like conductor into the through hole is assumed as a previous position. A position is assumed as a winding position where the band-like conductor is inserted in the first insert hole and entangled with a major side of the first insert hole for bending, for the band-like conductor and the major side to be overlapped each other. Projection positions (16a, 16b and 16c) of the band-like conductor at the previous position, at the penetration position, and at the winding position relative to rear side members are arranged linearly, with the band-like conductor fixed and connected to the terminal plate.

Description

  The present invention relates to a solar cell module with a terminal box and a terminal box, and more specifically, a solar cell with a terminal box having a feature in a wiring structure of a strip-like lead wire extending from the solar cell module and a terminal plate in the terminal box. The present invention relates to a module and a terminal box used for the module.

  In a solar cell power generation system, a terminal box that relays output power from a solar cell module is used. A conventional terminal box includes a terminal plate in a box housing. A tab wire connecting portion is formed at one end of the terminal plate as a slit-like hole to which a tab wire extending from the solar cell module is connected.

  The terminal box is bonded to the back sheet of the solar cell module. After the band-like tab wire extending through the through hole provided in the back sheet is inserted into the slit-like tab wire connecting portion, the tab wire is entangled with the tab wire connecting portion as necessary. The tab wire connection portion and the tab wire are soldered.

  The strip-like lead wire referred to as a tab wire in the prior art is easy to bend in the thickness direction, but is difficult to bend in the long side direction (that is, the longitudinal direction) or the short side direction (that is, the width direction). If it is bent forcibly, the stress applied to the strip-shaped conductor becomes large, and the connection work between the strip-shaped conductor and the terminal plate becomes difficult and takes time. Therefore, conventionally, a terminal box is attached so that the tab wire connecting portion of the terminal plate is positioned on the longitudinal extension line of the strip-shaped conducting wire laid in the solar cell module.

  Therefore, in the conventional solar cell module with a terminal box, the connection direction with the terminal plate is the first in the solar cell module side design of the laying of the strip-shaped conductors, and in connection design of a plurality of solar cells in the solar cell module. The rest of the design is heavily constrained. Similarly, on the terminal box side, the fixing location and direction to the solar cell module are greatly restricted. These restrictions have a great influence on the design of the solar cell module with a terminal box.

  As described above, in the conventional technique, the terminal box itself must be specifically designed for each specific solar cell module. This also hinders cost reduction by sharing the terminal box in the solar cell system.

  Among terminal boxes, especially in the case of a terminal box having an outer shape of a quadrangular prism shape and external connection cables taken out from both end faces of the quadrangular prism, there are particularly great restrictions on design and design.

  Moreover, in the solar cell module, in the solar cell module in which both the front surface member and the back surface member are made of a transparent material (this type of solar cell module may be called a laminated glass type) There are large design restrictions.

JP 2009-246039 A

  The problem to be solved by the present invention is that in the solar cell module with a terminal box, the laying design of the strip-like conductors, and thus the connection design of a plurality of solar cells in the solar cell module are limited. In that case, the fixing location, direction, etc. to the solar cell module are limited. Furthermore, the problem to be solved by the present invention is that the design is greatly affected in the solar cell module with terminal box.

  Other problems of the present invention will become apparent from the description of the present invention.

  Means for solving the problems will be described below. For ease of understanding, description will be made with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited to the embodiments. A number as a symbol may indicate a part or the like collectively. When an individual part or the like is indicated in an embodiment described later, an alphabetic suffix may be added after the number.

A solar cell module with a terminal box according to an aspect of the present invention is provided.
A solar cell module 10 having solar cells sandwiched between a front surface member and a back surface member;
Consists of a terminal box 30 with a terminal plate that relays the output power of the solar cell module,
A solar battery with a terminal box connected to the electrode of the solar battery cell 22 and drawn out from a through hole opened in the back member, and inserted into an insertion hole provided in the terminal plate, and the belt-like conductive wire and the terminal plate are fixedly connected. In the module
The terminal board 40 has a rectangular first insertion hole 46 and a rectangular second insertion hole 47. The first insertion hole and the second insertion hole are long sides of each other, an extension line of one long side, and another length. The sides or the extended lines of the long sides of each other are arranged at positions orthogonal to each other,
The position where the strip-shaped lead wire 15 passes through the through hole 14 is defined as a through position 15b.
The longitudinal direction of the band-shaped conductor at the immediately preceding position 15a, which is the position immediately before passing through the through-hole in the solar cell module, is the laying direction of the band-shaped conductor (arrow 21),
The terminal box is fixed to the back member 13 of the solar cell module, and the terminal plate is fixed in the terminal box,
The terminal box is arranged so that the long side of the second insertion hole 47 of the terminal plate is parallel to the laying direction of the strip-shaped conductor,
The strip-shaped lead wire is introduced into the terminal box, the strip-shaped lead wire is inserted into the first insertion hole, and is bent by being entangled with the long side of the first insertion hole. Formed,
Projection positions (16a, 16b, 16c) of the strip-shaped lead wire at the immediately preceding position, the strip-shaped lead wire at the penetrating position and the strip-shaped lead wire at the winding position onto the back surface member are linearly arranged, and the strip-shaped lead wire is connected to the terminal. It is characterized by being fixedly connected to the plate.

The solar cell module with a terminal box according to the present invention can be implemented in the following preferred embodiments.
1. The first insertion hole and the second insertion hole are arranged at positions where their long sides are orthogonal to each other, and the length of the short side of the second insertion hole is less than the length in the width direction of the strip-shaped conductor.
2. In the single terminal box, it has the first terminal plate and the second terminal plate, the first external connection cable is connected to the first terminal plate, and the second terminal plate A second external connection cable is connected, and the first external connection cable, the first terminal plate, the second terminal plate, and the second external connection cable are arranged in series in this order.

A terminal box 30 according to another aspect of the present invention includes:
A solar cell module terminal box comprising a terminal plate fixed to a back surface member of a solar cell module in which solar cells are sandwiched between a front surface member and a back surface member, and relaying output power of the solar cell module. In the terminal box connected to the electrode of the cell, the strip-shaped lead wire 15 drawn out from the through hole provided in the back member is inserted into the insertion hole provided in the terminal plate 40, and the strip-shaped lead wire and the terminal plate are fixedly connected.
The terminal board 40 has a rectangular first insertion hole 46 and a rectangular second insertion hole 47. The first insertion hole and the second insertion hole are long sides of each other, an extension line of one long side, and another length. The extended lines of the sides or the long sides of the sides are arranged at the orthogonal positions.

The terminal box concerning this invention can be implemented with the following preferable aspects.
1. The first insertion hole and the second insertion hole are arranged at positions where their long sides are orthogonal to each other, and the length of the short side of the second insertion hole is less than the length in the width direction of the strip-shaped conductor.
2. In the single terminal box, it has the first terminal plate and the second terminal plate, the first external connection cable is connected to the first terminal plate, and the second terminal plate A second external connection cable is connected, and the first external connection cable, the first terminal plate, the second terminal plate, and the second external connection cable are arranged in series in this order.

  The present invention described above, preferred embodiments of the present invention, and components included in these can be implemented in combination as much as possible.

  In the present invention, the terminal board in the terminal box has a first insertion hole and a second insertion hole that are orthogonal to each other, and these are arranged in a specific positional relationship with the strip-shaped conductor in the solar cell module. The first insertion hole and the second insertion hole are referred to in the description, and the present invention can be implemented even if their roles are interchanged. For this reason, in the solar cell module with a terminal box, even if the laying direction of the strip-shaped conductor is different in the perpendicular direction, the first and second insertion holes are selected as the insertion holes for conducting the conductor connection, and the strip-shaped conductor There is an advantage that can be inserted and fixed. The belt-like conducting wire can be wound and connected through the insertion hole of the terminal plate only by bending in the thickness direction without bending in the long side direction (that is, the longitudinal direction) or the short side direction (that is, the width direction).

  Since the terminal box can be arranged in a design-friendly manner, the solar cell module with a terminal box also has an advantage of having excellent design properties.

  In the terminal box according to the present invention, the terminal plate has a first insertion hole and a second insertion hole that are orthogonal to each other. It can be easily attached to the solar cell module without changing. For this reason, it can be attached to a solar cell module in which the laying direction of the strip-like conductor is different without changing the design, and can be attached while maintaining the design. The terminal box according to the present invention does not require custom design and manufacture for each individual solar cell module application, and is suitable for cost reduction by mass production.

FIG. 1 is an explanatory view showing a solar cell module 1 with a terminal box. 2A and 2B are explanatory views showing the terminal box 30. FIG. 2A is a plan view, FIG. 2B is a cross-sectional view, and is a plane indicated by the line AB in FIG. 2A. The cut | disconnected cross section is shown, FIG.2 (c) is a front view, FIG.2 (d) is a bottom view. FIG. 3 is a cross-sectional explanatory view of a solar cell module and a terminal box showing a connection mode between a strip-shaped lead wire extending from the solar cell module and a terminal plate. FIG. 4 is an explanatory diagram showing the arrangement of the strip-like conductors at the immediately preceding position, the penetrating position, and the winding position. FIG. 5 is an explanatory plan view of a terminal board in which the first insertion hole and the second insertion hole are arranged differently. FIG. 6 is an explanatory plan view of a terminal board in which the mutual arrangement of the first insertion hole and the second insertion hole is further different.

  Hereinafter, a solar cell module with a terminal box and a terminal box according to an embodiment of the present invention will be further described with reference to the drawings. In the drawings referred to in this specification, in order to facilitate the understanding of the present invention, some of the components are schematically illustrated in an exaggerated manner. For this reason, the dimension, ratio, etc. between components may differ from a real thing. Further, the dimensions, materials, shapes, relative positions, etc. of the members and parts described in the embodiments of the present invention are not intended to limit the scope of the present invention to those unless otherwise specified. It is merely an illustrative example.

  FIG. 1 is an explanatory view showing a solar cell module with a terminal box. 2A and 2B are explanatory views showing a terminal box, FIG. 2A is a plan view, FIG. 2B is a cross-sectional view, and is cut along a plane indicated by line AB in FIG. 2A. 2 (c) is a front view, and FIG. 2 (d) is a bottom view.

  FIG. 3 is a cross-sectional explanatory view of a solar cell module and a terminal box showing a connection mode between a strip-shaped conductor extending from the solar cell module and a terminal plate, and FIG. 4 is a strip-shaped conductor at the immediately preceding position, through position, and winding position It is explanatory drawing which shows arrangement | positioning etc.

  The solar cell module 1 with a terminal box includes a solar cell module 10 and a terminal box 30.

  In the solar cell module 10, solar cells 22 a, 22 b, 22 c, and 22 d are sandwiched between the front surface member 11 and the back surface member 13. In the illustrated example, the electrodes of four solar cells 22 a, 22 b, 22 c and 22 d are connected in series by a connection line 17. The four solar cells 22a, 22b, 22c and 22d form a single cell string. Band-shaped conductors 15 are connected to both ends of the cell string. The output power of the cell string is taken out via the strip conductor 15.

  The strip-shaped conductor may be called a flexible strip-shaped conductor cable, a ribbon-shaped conductor, a ribbon-shaped copper wire, or a strip-shaped tab wire. In the present invention, there is no particular limitation on the width, thickness, and length of the strip-shaped conductor. For solar cell module applications, strip conductors having a width of 3.5 mm to 6.0 mm are frequently used, and strip conductors having a thickness of 0.2 mm to 0.5 mm are frequently used, and the lengths thereof are various. The material of the strip conductor is not particularly limited, but tin-plated copper is generally used.

  A terminal box 30 is connected and fixed to the back surface member 13 of the solar cell module 10 using an adhesive.

  The surface member 11 is a plate material made of a translucent material, for example, a glass plate. The back member 13 is a back sheet made of PET or PVF (polyvinyl fluoride). Moreover, when the solar cell module 10 is a laminated glass type, the back surface member 13 is a board | plate material which consists of a translucent material like the surface member 11, for example, a glass plate is used. Between the front surface member 11 and the back surface member 13, there is a cell arrangement layer 12 in which the solar battery cell 22, the connecting wire 17, and the strip-like conductive wire 15 are sealed with a resin such as EVA.

  The terminal box 30 has a terminal plate 40 therein, and the strip-shaped conductive wire 15 is fixedly connected to the terminal plate 40. An external connection cable 34 is fixedly connected to the terminal board 40.

  The terminal box 30 has a quadrangular prism shape, and a first terminal plate 40a and a second terminal plate 40b are arranged in a casing 31 having a shape in which one side surface is opened. The casing 31 is connected to the solar cell module 10 with the bottom surface 32 facing the back surface member 13. The aforementioned open side is covered with a lid 56 and closed. In the plan view shown in FIG. 2A, the illustration of the lid 56 is omitted.

  The terminal board 40 is plate-shaped, the tip part is a diode connection part 53, the middle part is a conductor connection part 54, and the base part is a cable connection part 55. Barriers 52 are formed on the leading end side and the base side of the conductive wire connecting portion 54, each of which is parallel to the width direction and has a raised structure connecting both ends in the width direction. The barrier 52 plays a role of preventing the molten solder from being excessively spread when the band-like conductor 15 is soldered to the conductor connecting portion 54.

  A first insertion hole 46 and a second insertion hole 47 are opened in the conductive wire connecting portion 54. The first insertion hole 46 is a through hole having a rectangular shape in plan view. The second insertion hole 47 is a through hole having a rectangular shape in plan view. The first insertion hole 46 and the second insertion hole 47 do not necessarily have the same ratio and dimension of the long side length to the short side length, but are preferably the same. This is because the first insertion hole 46 and the second insertion hole 47 play the same role.

  The long side of the first insertion hole and the long side of the second insertion hole are orthogonal to each other. That is, the first insertion hole 46 and the second insertion hole 47 intersect with each other to form a cross-shaped through hole.

  In the present invention and the present specification, “orthogonal” means that two lines or surfaces intersect at an intersection angle of 90 degrees, and also means that the intersection angle intersects at an angle of intersection of 70 degrees to 110 degrees. This is because, in view of one problem to be solved by the present invention that avoids stress caused by bending or twisting the strip-shaped lead wire, the problem can be solved even if the range is “orthogonal”. . However, “orthogonal” means that the two lines or planes intersect at an intersection angle of 80 to 100 degrees is the second best, and geometric orthogonality is most preferable.

  The length of the short side of the second insertion hole 47 indicated by the arrow 50 is less than the length in the width direction of the strip-shaped conductor 15. As described above, since the width of the strip-shaped lead wire is 3.5 mm to 6.0 mm, the length of the short side of the second insertion hole 47 is less than 3.5 mm. Similarly, the length of the short side of the first insertion hole 46 is less than the length in the width direction of the strip-shaped lead wire 15.

  If this length condition is satisfied, even if the long side of the first insertion hole is notched, at least a part of the straight line connecting the width direction of the strip-shaped conductor when the strip-shaped conductor is inserted is the long side. Will be in contact. For this reason, even if the first insertion hole and the second insertion hole cross each other, the belt-like lead inserted through the first insertion hole can be easily entangled with the long side of the first insertion hole by simply bending the wire. It can be in a rolled state.

  The base of the terminal board 40 has an open barrel shape. The terminal board 40 and the external connection cable 34 are electrically connected by positioning and caulking the core wire of the external connection cable 34 at the barrel portion.

  A concave connector is connected to the other end of the external connection cable 34a, and a convex connector is connected to the other end of the external connection cable 34b. The external connection cable 34 is connected to an external connection cable of another solar cell module or connected to an inverter.

  A part of the bottom plate 32 of the housing 31 rises upward to form a locking projection 39. The terminal plate 40 has a locking hole, and the locking projection 39 is passed through the locking hole, and the locking metal fitting 38 is fitted to the locking projection 39 from above to fix the terminal plate 40 to the housing 31. Yes. The terminal board 40 is placed on a pedestal that stands up from the bottom plate. In this way, the terminal plate 40 is arranged and fixed in parallel with the bottom plate 32.

  A part of the bottom plate 32 is opened to form a square wiring opening 33. However, the shape of the wiring opening 33 can be arbitrarily determined. The strip-shaped conducting wire 15 extending from the solar cell module passes through the wiring opening 33 and is introduced into the terminal box. The wiring opening 33 is directly below the conductor connection portion 54. That is, referring to the bottom view of FIG. 2D, the projection surfaces of the first insertion hole and the second insertion hole are inside the wiring opening 33. If it is this positional relationship, the introduction operation | work to the terminal box of a strip | belt-shaped conducting wire and the insertion operation | work to the 1st insertion hole of a strip | belt-shaped conducting wire will become easy.

  A diode 51 is connected to the first terminal plate 40a and the second terminal plate 40b. The diode 51 prevents a reverse current from flowing through the solar cell string. The diode 51 is stretched over the diode connection part 53 of the first terminal plate 40a and the diode connection part of the second terminal plate 40b.

  The material of the terminal board 40 is not particularly limited, and examples thereof include tin-plated brass and tin-plated copper. In this example, the thickness of the terminal board 40 is 0.8 mm, the maximum length is 40.5 mm, and the maximum width is 11.0 mm.

  The material of the housing 31 is not particularly limited, and is, for example, a modified polyphenylene ether resin. In this example, the outer dimensions of the housing 31 are 17.0 mm in length, 105.0 mm in width, and 13.5 mm in height.

  Then, the fixed connection work and arrangement | positioning state of the strip | belt-shaped conducting wire 15 to the terminal board 40 are demonstrated.

  A through hole 14 is formed in a part of the back member 13. The strip-shaped lead wire 15 is drawn out of the back surface member 13 from the cell arrangement layer 12 through the through hole 14. The through hole 14 and the wiring opening 33 are positioned in the vicinity, or overlapped, and the strip-shaped lead wire 15 is drawn into the terminal box. Then, the bottom plate 32 is bonded to the back member 13. In this way, the terminal plate 40 is positioned in the terminal box 30 with its plane parallel to the back member 13.

  The strip-shaped lead wire 15 introduced into the terminal box is inserted into the first insertion hole 46, and the portion protruding from the first insertion hole is entangled with the long side of the first insertion hole and bent.

In order to facilitate explanation and easy understanding of the invention, the following positions and directions are defined for convenience.
(1) The position immediately before the strip-shaped conductor 15 is in the solar cell module and passes through the through hole is defined as the immediately preceding position 15a.
(2) The longitudinal direction of the strip-shaped conductor at the immediately preceding position is defined as the laying direction of the strip-shaped conductor (arrow 21).
(3) A position where the belt-like conductor 15 passes through the through hole 14 is defined as a through position 15b.
(4) As a result of bending the belt-like conducting wire around the long side of the first insertion hole, the position where the belt-like conducting wire and the long side overlap is defined as a winding position 15c.
(5) In the strip-shaped lead wire 15, the projection surface of the immediately preceding position 15 a onto the back member is 16 a, the projection surface of the penetrating position 15 b onto the back member is 16 b, and the projection surface of the winding position 15 c onto the back member is 16c.

  The terminal box 30 and the back member 13 are fixed by arranging the long side of the second insertion hole 47 of the terminal plate in parallel with the laying direction. In FIG. 4, the long side direction of the second insertion hole 47 is indicated by an arrow 49. The arrow 49, which is the long side direction, is parallel to the laying direction of the strip-shaped conductor (arrow 21). In FIG. 4, the long side direction of the first insertion hole 46 is indicated by an arrow 48.

  The terminal box is positioned such that the projection surface 16a at the immediately preceding position 15a, the projection surface 16b at the penetrating position 15b, and the projection surface 16c at the winding position 15c are linearly arranged. Thus, by arrange | positioning a solar cell module, a strip | belt-shaped conducting wire, and a terminal box, a strip | belt-shaped conducting wire passes through an insertion hole, and is wound and fixed to an insertion hole, without twisting. The fixed connection may be performed by, for example, solder 42.

  The case where the laying direction (arrow 21) is parallel to the X axis in the XY coordinates added in FIG. 1 has been described above.

  As described above, the first insertion hole 46 and the second insertion hole 47 are arranged orthogonal to each other. The first insertion hole and the second insertion hole are names for explanation of the rectangular hole in plan view, and the invention can be implemented as it is even if the roles are interchanged. If the laying direction is parallel to the Y-axis, the band-shaped conductor is inserted into the insertion hole described as the second insertion hole, and the band-shaped conductor is wound around the long side of the second insertion hole.

  According to the present invention, regardless of the direction in which the terminal box 30 is arranged on the solar cell module, the strip conductor is easy and stress-free regardless of whether the strip conductor is laid in the X-axis direction or the Y-axis direction. And terminal board can be connected. Furthermore, for example, the terminal box is replaced even if the laying direction of the strip-shaped conductor connected to the first terminal plate is the X-axis direction and the laying direction of the strip-shaped conductor connected to the second terminal plate is the Y-axis direction. Without this, and without changing the mutual arrangement of the solar cell module and the terminal box, the strip conductors can be easily connected.

  In the present invention, the mutual arrangement of the first insertion hole and the second insertion hole is not limited to the arrangement in which the long sides are orthogonal to each other. FIG. 5 is an explanatory plan view of the terminal board 140 in which the first insertion hole and the second insertion hole are arranged differently. The terminal board 140 has a first insertion hole 146 and a second insertion hole 147 in the conductive wire connecting portion 154. The first insertion hole 146 is a through hole having a rectangular shape in plan view. The second insertion hole 147 is a through hole having a rectangular shape in plan view. The extension line of the long side of the first insertion hole and the extension line of the long side of the second insertion hole are orthogonal to each other.

  FIG. 6 is an explanatory plan view of the terminal plate 240 in which the mutual arrangement of the first insertion hole and the second insertion hole is further different. The terminal board 240 has a first insertion hole 246 and a second insertion hole 247 in the conductive wire connecting portion 254. The first insertion hole 246 is a through hole having a rectangular shape in plan view. The second insertion hole 247 is a through hole having a rectangular shape in plan view. The extended lines of the long side of the first insertion hole and the long side of the second insertion hole are orthogonal to each other.

  A preferable mutual arrangement of the first insertion hole and the second insertion hole is an arrangement in which the long sides are orthogonal to each other, and a most preferable mutual arrangement is an arrangement in which the long sides are orthogonal to each other at the intermediate point. This is because the area of the conductor connecting portion of the terminal plate is reduced, which contributes to the miniaturization of the terminal box.

  The terminal box according to the present invention may have a single terminal plate or may include a plurality of terminal plates. In view of one effect of the present invention in which it is not necessary to change the arrangement direction of the terminal box even if the laying direction of the strip-shaped conductors is orthogonal, a terminal including two terminal plates having a first insertion hole and a second insertion hole The box is a form that further exhibits the effect of the present application, and a terminal box that includes three or more terminal boards having the first insertion hole and the second insertion hole is a form that further exhibits the effect.

  Also, in a terminal box including a plurality of terminal boards, the arrangement of the terminal boards and external connection cables may be such that a plurality of external connection cables are arranged in a straight line, or a plurality of external connection cables are arranged in parallel. It may be.

  The terminal box illustrated in FIG. 2 is an example of a terminal box in which a plurality of external connection cables are arranged in a straight line. With reference to FIG. 2, the terminal box in which the external connection cables are arranged in a straight line will be described in more detail. The single terminal box 30 has a first terminal plate 40a and a second terminal plate 40b. A first external connection cable 34a is connected to the first terminal board 40a, and a second external connection cable 34b is connected to the second terminal board 40b. As for these, the 1st external connection cable 34a, the 1st terminal board 40a, the 2nd terminal board 40b, and the 2nd external connection cable 34b are arrange | positioned in series in this order. As a result, the plurality of external connection cables are arranged in a straight line.

  Such a terminal box is usually a quadrangular prism, and its side surface is arranged in the vicinity of one side of the solar cell module (the vicinity is, for example, a distance from one side to 0 mm to 150 mm) parallel to the one side. Then, the design gets a sense of comfort. In this arrangement, the connection work can be performed easily and in a short time regardless of whether the laying direction of the strip-shaped conductor is the X-axis direction or the Y-axis direction.

  A form in which a plurality of external connection cables are arranged in parallel means that the external connection cable is connected to one end of the terminal board, the terminal board and the external connection cable are connected, and the line connecting the terminal board and the external connection cable is parallel. A plurality of terminal boards are arranged. In this case, there are a cable in which the external connection cable goes out in the same direction and a cable in which the external connection cable goes out on the opposite side. A terminal box having a form in which a plurality of external connection cables are arranged in parallel has a generally flat rectangular parallelepiped shape.

  A terminal box in which a plurality of external connection cables are arranged in a straight line is a more preferred embodiment of the present invention. This terminal box should be arranged with its longitudinal direction parallel to the sides of the solar cell module, and the arrangement is substantially fixed. For this reason, it becomes a preferred embodiment of the present invention in which the laying direction of the strip-like conductor can be selected regardless of the arrangement of the terminal box.

  Moreover, the terminal box concerning this invention may not have an intermediate terminal board, and may have an intermediate terminal board. Having an intermediate terminal plate means that an external connection cable is connected and two terminal plates having a first insertion hole and a second insertion hole are arranged at both ends, and the external connection cable is not connected between the two terminal plates. It is a terminal box in which one or more intermediate terminal boards having a first insertion hole and a second insertion hole are arranged.

  Among those having an intermediate terminal plate, a terminal box having an intermediate terminal plate having a first insertion hole and a second insertion hole is an even more preferred embodiment. Such a terminal box has, for example, a solar cell module in which strip-shaped conductors connected to the terminal plates at both ends are laid in parallel to the X-axis, and strip-shaped conductors connected to the intermediate terminal plate are laid in parallel to the Y-axis. Can be used (X-axis and Y-axis are the directions shown in FIG. 1).

  The solar cell module according to the present invention may be a laminated glass type, and the back member may be a non-light-transmitting type. A laminated glass type is a more suitable embodiment because the terminal box is visible from the front and back surfaces and the design is visually observed from the front and back surfaces.

  The number of cells contained in the solar cell module may be singular or plural. In view of the present invention in which the degree of freedom of cell connection mode and connection mode is increased, a solar cell module including a plurality of cells is a more suitable embodiment.

DESCRIPTION OF SYMBOLS 1 Solar cell module with a terminal box 10 Solar cell module 11 Surface member 12 Cell arrangement layer 13 Back surface member 14 Through-hole 15 Strip | belt-shaped conducting wire 15a Strip | belt-shaped conducting wire in the immediately preceding position, 15b Strip | belt-shaped conducting wire in the penetrating position, 15c Strip | belt-shaped in the winding position Conductive wire 16a Projection surface of the strip-shaped lead wire immediately before the back surface member, 16b Projection surface of the strip-shaped lead wire at the penetrating position to the back surface member, 16c Projection surface of the strip-shaped conductor wire at the winding position to the back surface member 17 Connection line 21 Arrow Laying direction 22 Solar cell 23 Module side 30 Terminal box 31 Housing 32 Bottom plate 33 Wiring opening 34 External connection cable, 34a External connection cable, 34b External connection cable 40 Terminal plate, 40a First terminal plate, 40b Second terminal Plate 42 Solder 46, 146, 246 First insertion hole 47, 147, 247 Second Insertion hole 48 Arrow Long side direction of the first insertion hole 49 Arrow Long side direction of the second insertion hole 50 Arrow Length of the short side of the second insertion hole 52 Barrier 53 Diode connection part 54 Conductive connection part 55 Cable connection part 56 Lid 140 Terminal Board According to Second Embodiment 240 Terminal Board According to Third Embodiment

Claims (6)

A solar cell module that sandwiches solar cells between the front surface member and the back surface member;
It consists of a terminal box with a terminal board that relays the output power of the solar cell module,
A solar cell module with a terminal box, which is connected to the electrode of the solar battery cell, and the strip-shaped lead wire drawn out from the through hole opened in the back surface member is inserted into the insertion hole provided in the terminal plate, and the strip-shaped lead wire and the terminal plate are fixedly connected In
The terminal board has a rectangular first insertion hole and a rectangular second insertion hole, and the first insertion hole and the second insertion hole are long sides of each other, an extension line of one long side and another long side, or The extension lines of the long sides of each other are arranged at a position orthogonal to each other,
The position where the strip-shaped lead wire passes through the through hole is defined as the through position,
The longitudinal direction of the band-like conductor at the position immediately before the band-like conductor is in the solar cell module and immediately before passing through the through hole is the laying direction of the band-like conductor,
The terminal box is fixed to the back surface member of the solar cell module, and the terminal plate is fixed in the terminal box,
The terminal box is arranged so that the long side of the second insertion hole of the terminal plate is parallel to the laying direction of the strip-shaped conductor,
The strip-shaped conducting wire was introduced into the terminal box, the strip-shaped conducting wire was inserted into the first insertion hole and bent around the long side of the first insertion hole, and a winding position where the strip-shaped conducting wire and the long side overlapped was formed. Is,
Projection positions on the back members of the strip-shaped conductor at the immediately preceding position, the strip-shaped conductor at the penetrating position and the strip-shaped conductor at the winding position are linearly arranged, and the strip-shaped conductor is fixedly connected to the terminal plate. A solar cell module with a terminal box. In the solar cell module with terminal box,
The first insertion hole and the second insertion hole are arranged at positions where their long sides are orthogonal to each other, and the length of the short side of the second insertion hole is less than the length in the width direction of the strip-shaped conductor. The solar cell module with a terminal box according to claim 1. In the solar cell module with terminal box,
In the single terminal box, it has the first terminal plate and the second terminal plate, the first external connection cable is connected to the first terminal plate, and the second terminal plate The second external connection cable is connected
The first external connection cable, the first terminal plate, the second terminal plate, and the second external connection cable are arranged in series in this order. The described solar cell module with terminal box. A solar cell module terminal box comprising a terminal plate fixed to a back surface member of a solar cell module in which solar cells are sandwiched between a front surface member and a back surface member, and relaying output power of the solar cell module. In the terminal box connected to the electrode of the cell, the strip-shaped lead wire drawn out from the through hole provided in the back member is inserted into the insertion hole provided in the terminal plate, and the strip-shaped lead wire and the terminal plate are fixedly connected.
The terminal board has a rectangular first insertion hole and a rectangular second insertion hole, and the first insertion hole and the second insertion hole are long sides of each other, an extension line of one long side and another long side, or The terminal box for solar cell modules arrange | positioned in the position where the extension line | wire of a mutual long side orthogonally crosses. In the solar cell module terminal box,
The terminal box for solar cell modules according to claim 4, wherein the first insertion hole and the second insertion hole are arranged at positions where their long sides are orthogonal to each other. In the solar cell module terminal box,
In the single terminal box, it has the first terminal plate and the second terminal plate, the first external connection cable is connected to the first terminal plate, and the second terminal plate The second external connection cable is connected
The solar cell module according to any one of claims 4 to 5, wherein the first external connection cable, the first terminal plate, the second terminal plate, and the second external connection cable are arranged in series in this order. Terminal box.

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