JPH09135039A - Electrical connection structure of solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an electrical connection work on an on-the-spot roof by a method wherein an electrical connection structural means, which connects electrically a plurality of solar cell modules with each other at the point of time when each solar cell module is mounted to a part to be mounted, is provided. SOLUTION: Femal terminals 27 are mounted on the peripheral edge part of the rear of a solar cell module 21 and male terminals 28 are clamped on a shaped material 23 located at positions facing the terminals 27. In the case where the solar cell modules 21 are parallel-connected, both + and - lead wires of each module 21 are assembled in a terminal box 26, the assembled lead wires are assembled in each + wires and each wires and the + wires and the - wires are respectively connected with the two terminals 27 as an individual assembled lead wire. The adjacent terminals 28 of the module 21 are connected with each other through a wiring 28a. The terminals 28 mounted on both side surfaces of the material 23 are fitted into the terminals 27 mounted on the rear of the module 21 at the point of time when the module 21, which is used as a roof, is mounted to a part 24 to be mounted, both terminals 28 and 27 are made to have continuity with each other and the adjacent modules 21 are connected on with each other in order.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar power generation device, and more specifically to a solar cell module electrical connection structure.

[0002]

2. Description of the Related Art Conventionally, as this kind, for example, FIG.
There is something like that shown in

First, the structure will be described. 1 in FIG.
Is a solar cell module, 2 is a roof on which the solar cell module 1 is installed, and shows a state in which it is mounted on the roof 2 by a plurality of mounting brackets 3.

FIG. 5 (b) shows an electrical connection state of the solar cell module 1 mounted on the roof 2. That is, 5 is a lead wire, 4 is a connector provided on the lead wire 5, 6 is a wiring, 7 is a current collecting box, 8 is an inverter, and 9 is a distribution board.

The electric power obtained from the solar cell module 1 is wired and enters the inverter 8 through the current collection box 7 to convert the DC electric power into the AC electric power, and the distribution board 9 is used for household electric appliances. It supplies electricity to companies and sells electricity to electric power companies.

[0006]

However, in such a conventional one, the solar cell module 1
In order to mount the above-mentioned on the conventional roof 2 and generate electric power, the collective wiring work for connecting the many lead wires 5 provided on the back side of the solar cell module 1 via the connector 4 is performed on the local roof, Has a problem in that workability is poor and man-hours are required for electrical connection work because wiring is required through the roof 2.

[0007] Therefore, the present invention is to provide an electrical connection structure of a solar cell module capable of reducing the electrical connection work on the local roof.

[0008]

In order to achieve the above-mentioned object, the invention described in claim 1 is such that a plurality of plate-shaped solar cell modules are arranged so as to be adjacent to each other and attached to an attached portion. In a structure for electrically connecting the solar cell modules to each other, the plurality of solar cell modules are electrically connected to each other when the solar cell modules are mounted on the attached portion. It is characterized in that a connection structure means is provided.

In such a structure, the wiring can be made only by mounting the solar cell module, and the wiring work at the construction site for electrical connection is reduced.

The invention described in claim 2 is the electrical connection structure for a solar cell module according to claim 1, wherein the electrical connection structure means has one of a female terminal and a male terminal on the back surface side of the solar cell module. Is provided so as to project, and the other is provided on the attached side, and both terminals are set so that they are fitted and conducted when the solar cell module is mounted, and the female terminals of the adjacent solar cell modules or The other of the male terminals is electrically connected.

[0011] In such a case, the installation of the terminals to the solar cell module can be performed in a factory with good workability, and the workability increases as the solar cell module is installed on a larger scale. The number of man-hours at bad construction sites can be reduced and the process can be improved.

According to a third aspect of the present invention, in the electrical connection structure of the solar cell module according to the first or second aspect, the attached portion has a lattice frame shape and is formed on a roof or an outer wall of a building. The plurality of solar cell modules are installed in each lattice opening and serve as a roof or an outer wall.

In such a structure, the solar cell module which functions as a roof or an outer wall is simply installed,
Since the solar cell module can be used as the outer surface of the roof without requiring the conventional roof surface, the roof structure is simple. Therefore, the structure of the building is simple and the construction period is shortened.

According to a fourth aspect of the invention, in the electrical connection structure of the solar cell module according to any one of the first to third aspects, the both terminals are fitted to each other and the female terminal and / or the male terminal are pressed and deformed. In addition, a fitting adjustment means is provided on at least one of the terminals.

In such a structure, the contact force at the fitting portion is strong and the conductivity is good, and at the same time, the fitting adjustment can be performed even if there is a slight deviation in the mounting accuracy of both terminals. Just put it on from above and it will fit properly.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment of the Invention) A first embodiment of the invention will be described with reference to FIGS.

FIG. 1 shows a state where the solar cell module is mounted as a roof of a building.

In the figure, reference numeral 20 designates a building, and a roof 22 of this building 20 is assembled in a lattice shape with a shape member 23, and an attached portion 24 is attached.
The solar cell module 21 is attached to the lattice opening 24a, which forms the outer surface of the roof 22 and an outer wall (not shown).

FIG. 2 shows the electrical connection structure of the solar cell module according to the first embodiment of the invention.

As shown in the sectional view of FIG. 2 (b), 25 is an electric connection structure means, and 26 is a terminal box which is mounted on the back side of the solar cell module 21 and collects the lead wires of the solar cell. The lead collecting line 26a is formed on the terminal side.

Reference numeral 27 is a female terminal which is mounted on the peripheral portion of the back surface of the solar cell module 21, and 28 is a male terminal which is a female terminal 27.
It is fastened on the shape member 23 at a position opposite to.

In the electrical connection between the terminals 27 and 28, in the case of parallel connection as an example, first, both (+) and (-) lead wires of the solar cell module 21 are first attached to the back surface of the solar cell module 21. The lead boxes are collected in the mounted terminal box 26, and are collected for each of the (+) line and the (-) line and are connected as separate lead lines to the two female terminals 27 mounted on the peripheral portion of the solar cell module 21, respectively. . 2
Reference numeral 8a denotes wiring between the male terminals 28 that connects between the adjacent solar cell modules 21, and between the male terminals 28 is a shape member 23.
It is routed and looped through the section.

The above wiring work is all performed in the factory, not at the construction site.

The male terminals 28 mounted on both side surfaces of the frame 23 and the female terminals 27 mounted on the back surface of the solar cell module 21 are mounted on the mounting portion 24 of the solar cell module 21 serving as a roof. When they are attached, they are fitted and electrically connected, and the adjacent solar cell modules 21 are sequentially connected.

In this way, the (+) wiring and the (-) wiring are made for each block, and the (+) first terminal and the (-) wiring are provided.
From the terminal at the rear, the wiring is made to a current collecting box (not shown) installed in the building. Then, it is configured to be connected to an inverter that converts direct-current power into alternating-current power, and further supplied to household electric appliances and transmitted to a power company through a distribution board.

Here, the female terminal 27 and the male terminal 28, which are the electrical connection structure means 25 and which are fitted and called connectors, are
It is as shown in FIG.

That is, this female terminal 27 has a fitting portion 27b inside the center of the housing 27a, and a tapered surface 27c is provided at the inlet of the fitting portion 27b. Further, an insulator 27d is provided on the outer periphery of the fitting portion 27b,
The fitting portion of the fitting portion 27b has a tapered surface 27c and has an end surface portion 2
7e forms a curved surface toward the outside.

Further, a screw portion 27f is provided on the outer circumference of the insulator 27d made of plastic or the like.

The disc nut 27x screwed into the screw portion 27f and the bottom surface portion 27h of the housing 27a.
A spring 27y is inserted between and, and the fitting adjusting means 27g is inserted.
Is provided.

Therefore, by retracting the disc nut 27x forward, the reaction force of the spring 27y can be adjusted, the spring reaction force acts on the disc nut 27x, and by extension the fitting portion 2
The fitting input of 7b can be adjusted.

The setting position of the cap 27i that comes into contact with the end surface portion 27e of the fitting portion 27b is determined by screwing it into the housing 27a through a wrench hole 27k provided in the cap 27i.

Next, in the male terminal 28, the mounting portion 28
A pin shaft 28e is provided so as to project from m, and an elastic pressing portion is formed on the pin portion 28d provided at the tip of the pin shaft 28e, which is slightly larger than the inner diameter of the fitting portion 27b. When it is fitted into the fitting portion 27b, it is strongly adhered to the fitting surface to improve the conductivity.

In addition, when a misalignment of the core or the angle occurs between the male terminal 28 and the female terminal 27 due to poor terminal mounting accuracy or the like, since the base of the pin shaft 28e is formed into a spherical shape 28f, it is tilted. This is possible, and the pin portion 28d has a structure that can be easily fitted along the tapered surface 27c of the female terminal 27.

At the same time, on the female terminal 27 side, the spring 2 provided inside the female terminal 27 so as to match the inclination of the fitted pin portion 28e.
7y causes lateral bending and allows mutual fitting.

At this time, the end surface portion 27 of the fitting portion 27b is
Since e is a curved surface, the spring 27y is laterally flexed to facilitate the fitting.

When both terminals 27 and 28 are completely fitted, the sealing surface 27s of the female terminal 27 and the sealing surface 28s of the male terminal 28 are brought into contact with each other to be integrated, which serves to prevent rainwater and dust from entering. To do.

Here, the terminals 27 and 28 mounted on the back surface of the solar cell module 21 and the side surface of the profile member 23 are
It goes without saying that the positions of the male terminal 28 and the female terminal 27 may be interchanged and mounted.

Next, the operation will be described.

At the time of assembling the building 20 at the construction site, the solar cell module 21 is simply attached to the grid opening 24a so as to be lowered from above, and the female terminal 27, which is a connector attached to the back surface of the solar cell module 21, is attached. Fitting part 27
b and the pin portion 28d of the male terminal 28, which is mounted at the opposite position of the shape member 23, are fitted to each other, and all the solar cell modules 21 are connected.

Then, the wirings of the (+) and (-) two circuits are guided to a current collecting box (not shown), converted from direct current to alternating current power by an inverter, and then distributed to an electric device or power sale through a distribution board. Power is transmitted.

(Second Embodiment of the Invention) FIG. 3 shows an electrical connection structure when a solar cell module according to a second embodiment of the present invention is installed on a roof.

The second embodiment of the present invention will be described below by using the same reference numerals for the components common to the first embodiment.

In the figure, 21 is a solar cell module,
The solar cell module 21 is assembled to the module frame 31 via a gasket 31a, and is bolted to a prescribed position on the upper surface portion 33a of the lightweight iron aggregate 33.

The lower surface portion 33 of the lightweight steel frame 33
The mounting hardware 34 is provided in b, and the mounting hardware 34 and the roof 3
2 and the purlin 32a through the through holes, the bolts are fastened together.

The electrical wiring is the solar cell module 2
The female terminal 27 is provided on the peripheral portion of the back surface of the No. 1 and the male terminal 28 is attached to the bracket 35 provided so as to project from the side surface portion 33c of the lightweight steel aggregate 33 at the opposite position, and the solar cell module 21 is assembled. The terminals 27 and 28 are fitted and connected only by mounting the module frame 31 on the specified position of the lightweight steel frame member 33 so as to be lowered from above.

As a matter of course, the mounting positions of the female and male terminals of the terminals 27 and 28 used here may be interchanged.

The other structure and operation are similar to those of the first embodiment of the invention, and therefore the description thereof is omitted.

[0048]

As described above, the connection between the solar cell modules is carried out in advance in a factory with good workability between the lead wires of the complicated solar cell, between the lead wires and the terminal box, and between the terminals and the terminal box. You can do everything except the wiring after the collector box, such as mounting on the back surface of the solar cell module and on the profile. Therefore, workability is good.

At a construction site where the workability is poor, the wiring is completed simply by mounting the solar cell module in the grid opening, and the wiring work at the site can be greatly reduced.

[Brief description of the drawings]

FIG. 1A is a plan view of a roof of a building having a solar cell module of the present invention. (B) is a side view of the roof of the building which has the solar cell module of this invention.

FIG. 2A is an enlarged plan view of a portion A of FIG. FIG. 2B is a sectional view taken along line BB of FIG.

FIG. 3A is an enlarged plan view of a portion A of FIG. FIG. 3B is a sectional view taken along line CC of FIG.

FIG. 4 is an enlarged detailed view of a D section connector in FIGS. 2 and 3.

FIG. 5A is a perspective view of a roof of a building having a solar cell module according to a conventional embodiment. (B)
FIG. 6 is an explanatory diagram of the electrical connection of FIG.

[Explanation of symbols]

 21 ... Solar cell module 22 ... Roof 24 ... Attached part 24a ... Lattice opening 25 ... Electrical connection structure means 27 ... Female terminal 27b ... Fitting part, 27g ... Fitting adjusting means 28 ... Male terminal

Claims (4)

[Claims] 1. A structure in which a plurality of plate-shaped solar cell modules are arranged so as to be adjacent to each other and are attached to a mounting portion to electrically connect the solar cell modules to each other. An electrical connection structure for a solar cell module, characterized in that an electrical connection structure means is provided for electrically connecting the plurality of solar cell modules to each other when the solar cell module is mounted on the attached part. 2. The electrical connection structure means is provided with one of a female terminal and a male terminal protruding on the back surface side of the solar cell module, and the other is provided on the attached side, and both terminals are solar cells. It is set to be fitted and conductive when the module is mounted, and the other terminals of the female terminals or the male terminals of the adjacent solar cell modules are electrically connected to each other. The electrical connection structure of the described solar cell module. 3. The attached portion is provided so as to have a frame shape of a lattice and constitutes a part of a roof or an outer wall of a building, and the plurality of solar cell modules are attached to respective lattice openings to cover the roof or The electrical connection structure of the solar cell module according to claim 1 or 2, which functions as an outer wall. 4. The both terminals are fitted so that the female terminal and / or the male terminal are pressed and deformed, and at least one of the terminals is provided with a fitting adjusting means. An electrical connection structure for a solar cell module according to item 1.