JP2003229592A - Terminal box for solar battery module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate troublesome installation work of a terminal box B. <P>SOLUTION: A pair of terminal boards 20, 20 for connection of electrode (a) of a solar battery module M are allocated within a resin box 11, the connection connectors 40, 60 of external connection cable P are integrally formed with the insertion molding on a side wall of the box 11, and the connector 40 is connected to the terminal board 20. When the terminal box B and cable P are connected via the connector, the connector can be transported and installed easily under the condition that the terminal box B and cable P are separated, because the connector is detachable. When the molding temperature of the resin forming the box 11 is higher than the heat-resistant temperature of the connector 40, a burr-stop ring 50 is engaged with the inserting portion of the connector 40 to covering the inserting portion. Accordingly, thermal conduction during the molding process can be controlled, deformation of the connector 40 can also be prevented and forming burr due to the gap with the molding die resulting from deformation can also be prevented. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal box used when interconnecting solar cell modules constituting a solar power generation system that directly converts solar energy into electric energy.

[0002]

2. Description of the Related Art In a solar cell system, as shown in FIG. 13, a solar cell panel (solar cell module) M is arranged on the roof of a house, and a connection box Q, an inverter R, and a distribution board S are installed from the module M. Electric power is supplied to various electric appliances E via The solar cell modules M are arranged so that they are all flush with each other, and are connected in series or in parallel via a terminal box B (see FIGS. 11 and 12). The terminal box B is adhesively fixed to the back surface of the module M while maintaining the watertightness of the sealing material.

The terminal box B is conventionally disclosed in Japanese Patent Laid-Open No.
14 and 15 described in Japanese Patent Laid-Open No. 26035 and the like. That is, a pair of terminal plates 2 and 2 to which the positive electrode a and the negative electrode a of the solar cell module are connected are arranged in parallel in the box body 1 having the upper opening.
A bypass diode 3 for preventing backflow is provided between the two terminal plates 2 and 2, and an external connection cable P is connected to each of the terminal plates 2 and 2.

In the terminal box B having this structure, first, the terminal plate 2 is fitted into the protrusion 4 rising from the bottom surface of the box body 1 through the hole 5, and the protrusion 4 is caulked.
It is melted by ultrasonic waves and expanded to expand the terminal plate 2 to the box body 1
Fixed to.

The diode 3 has its lead wire 3a inserted into the hole 2a of the terminal plate 2 and connected to the terminal plate 2 by soldering. The cable P for external connection is introduced into the box body 1 through the side wall 6 thereof, and the side wall introduction portion has a seat 7 formed by cutting the side wall 6 in a semicircular shape and the cable P interposed in the seat 7. The fixed plate 8 covered with the fixed plate 8
Is fixed to the box body 1 by ultrasonic welding, screwing or the like. The box body 1 is filled with a silicone resin, and after waterproofing and fixing of the diode 3 and the like with a packing interposed, a cover 9 is put on.

[0006]

The conventional terminal box B
Since the cables P are integrally connected, the cables P are entangled and troublesome during transfer and installation, resulting in poor workability.

An object of the present invention is to solve the trouble.

[0008]

In order to solve the above problems, the present invention is designed to connect a terminal box and an external connection cable via a connector. Since the connector can be detached freely, the terminal box and the cable can be transported and installed in a state of being detached.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of the present invention, a pair of terminal plates to which a plus electrode and a minus electrode of a solar cell module are connected are provided in a resin box body, and a side wall of the box body is provided. It is possible to adopt a configuration in which the connector for connection of the external connection cable is integrally provided by insert molding, and the terminal of the connector is connected to the terminal plate.

In this structure, when the molding temperature of the box body molding resin is higher than the heat resistant temperature of the connector (housing), it is preferable to fit a deburring ring that covers the insert portion of the connector. If you do this,
At the time of molding the box body, heat conduction is suppressed by the ring, deformation of the connector is prevented, and a gap with the molding die due to the deformation does not occur, and burrs caused by the gap are eliminated.

[0011]

EXAMPLE One example is shown in FIGS. 1 to 6, and a pair of terminal plates to which a plus electrode a and a minus electrode a of a solar cell module M are connected in a rectangular box body 11 made of ABS resin having an upper opening. 20 and 20 are arranged in parallel. The electrodes a, a are soldered to the middle 21 of the terminal plate 20 through the through hole 11a. One end 20a of the terminal board 20
Therefore, it is connected to the terminal 41 of the male connector 40,
The male connector 40 and the terminal board 20 are inserted when the main body 11 is molded. A backflow prevention bypass diode 3 is soldered between the two terminal plates 20, 20, if necessary. The diode 3 may be attached after inserting the terminal plate 20 or before inserting it. Box body 11
A cover 30 made of a thermoplastic elastomer such as silicon rubber is fitted to the upper opening of the via a waterproof ring 31 to make it waterproof. The back surface of the box body 11 is textured, and the terminal box B is fixed by the adhesive tape 12 on the back surface.

The male connector 40 is a Zylon (trade name),
A male terminal 41 is inserted on the central axis of a cylindrical housing 42 formed of a hard resin such as nylon. This male connector 40 is connected to the terminal box body 11
Housing 42 when it is inserted during resin molding of
The cylindrical deburring ring 50 shown in FIG. The deburring ring 50 suppresses heat conduction from the molding resin during the molding of the box body 11, prevents the housing 42 from being deformed, and does not cause a gap with the molding die due to the deformation, which is caused by the gap. Burrs are also eliminated.

A female connector 60 fitted and connected to the male connector 40 has a housing 62 formed of a thermoplastic elastomer such as silicon rubber, and a female terminal 61 fitted on the central axis thereof. A cable P is crimp-connected to the female terminal 61, and a connection sleeve 63 is internally provided.

As in the conventional case, the terminal box B of this embodiment is attached to the back surface of the module M by adhesive fixing while maintaining the watertightness of the sealing material, as shown in FIG.
Connect them with a cable P.

7 to 10 show other respective embodiments,
In the embodiment shown in FIG. 7, the box body 11 is a long one,
The terminal board 20, the bypass diode 3, and the male connector 40 are arranged in series in the length direction. The diode 3 and the terminal plate 20 may be arranged in any number in parallel, and may be, for example, two rows as shown in FIG. In the embodiment shown in FIG. 10, the arrangement of the diode 3 and the terminal plate 20 is modified, and the box body 11 has a rectangular shape wider than that in FIG. These examples are also used as shown in FIG.

In each of the above embodiments, the bypass diode 3 is provided, but in the case where the backflow prevention is not necessary,
The diode 3 can be omitted. Further, instead of the male connector 40, the female connector 6 shown in FIGS.
It is also possible to integrate 0 into the box body 11. Further, the connector integrated with the box body 11 may be a male and female connector, and may be a multi-pole connector such as two poles as well as one pole.

[0017]

As described above, according to the present invention, since the connector for connecting the cable is integrally provided on the box body,
There is no risk of cables getting entangled during the transfer and installation of the box body, and the workability is improved.

[Brief description of drawings]

FIG. 1 is a front view of a connection state with a cable according to an embodiment.

2A is a right side view of FIG. 1, and FIG. 2B is a cut side view of the same.

FIG. 3A is a plan view with the cover of the embodiment removed.
(B) Rear view

FIG. 4 is a connection explanatory view of the embodiment.

5A is a front view of a male connector housing, FIG.
(B) is a cutaway front view of the female connector housing, (c)
Is the same female terminal, (d) is the same contact sleeve

FIG. 6 is a perspective view of a deburring ring.

FIG. 7 is a perspective view of another embodiment.

FIG. 8 is an exploded perspective view of essential parts of the embodiment.

FIG. 9 is a perspective view of another embodiment.

FIG. 10 is a perspective view of another embodiment.

FIG. 11 is a diagram showing how the embodiments are used.

FIG. 12 is a diagram showing how the embodiments are used.

FIG. 13 is a schematic diagram of a solar power generation system.

FIG. 14 is an exploded perspective view of a conventional example.

FIG. 15 (a) is a plan view of the same, and FIG. 15 (b) is a right side longitudinal sectional view.

[Explanation of symbols]

1, 11 Box body 2, 20 terminal board 3 Backflow prevention bypass diode 30 covers 40 male connector 41 Male terminal 42 Male Connector Housing 50 Deburring ring 60 female connector 61 Female terminal 62 female connector housing a Solar cell module electrode B terminal box M solar cell module P External connection cable

Claims (2)

[Claims] 1. A pair of terminal plates 20, 20 to which a plus electrode a and a minus electrode a of a solar cell module M are connected are provided in a resin box body 11, and externally connected to a side wall of the box body 11. A terminal box for a solar cell module, characterized in that a connecting male connector 40 or a female connector 60 of the cable P is integrally provided by insert molding, and the terminals 41 and 61 of the connector are connected to the terminal plate 20. 2. The terminal box for a solar cell module according to claim 1, wherein a deburring ring 50 covering the insert portions of the connectors 40 and 60 is fitted to the insert portions.