JP3769509B2 - Terminal box for solar cell module - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal box used when connecting solar cell modules constituting a photovoltaic power generation system that directly converts sunlight energy into electric energy.
[0002]
[Prior art]
As shown in FIG. 13, the solar cell system includes a solar cell panel (solar cell module) M arranged on the roof of a house, and various electric devices from the module M through a junction box Q, an inverter R, and a distribution board S. E is powered. The solar cell modules M are all arranged so as to be flush with each other, and are connected in series or in parallel via the terminal box B (see FIGS. 11 and 12). The terminal box B is adhered and fixed to the back surface of the module M while maintaining the watertightness of the sealing material.
[0003]
The terminal box B has a configuration shown in FIGS. 14 and 15 described in Japanese Patent Application Laid-Open No. 11-26035. That is, a pair of terminal plates 2 and 2 to which a positive electrode a and a negative electrode a of a solar cell module are connected are arranged in parallel in a box body 1 having an upper surface opening, and between the terminal plates 2 and 2. A backflow prevention bypass diode 3 is provided, and an external connection cable P is connected to each of the terminal plates 2 and 2.
[0004]
In the terminal box B having this configuration, first, the terminal plate 2 is fitted to the protrusion 4 rising from the bottom surface of the box body 1 through the hole 5, and the protrusion 4 is caulked or melted by ultrasonic waves to expand the diameter. Then, the terminal plate 2 is fixed to the box body 1.
[0005]
The diode 3 is connected to the terminal plate 2 by soldering the lead wire 3a into the hole 2a of the terminal plate 2. The external connection cable P is introduced into the box body 1 through the side wall 6, and the side wall introduction portion includes a receiving seat 7 in which the side wall 6 is cut into a semicircular shape, and the cable 7 is interposed in the receiving seat 7. The fixing plate 8 is covered and fixed to the box body 1 by ultrasonic welding, screwing or the like. The box body 1 is filled with silicon resin, or after waterproofing and fixing of the diode 3 and the like through packing, the cover 9 is covered.
[0006]
[Problems to be solved by the invention]
In the conventional terminal box B, since the cable P is integrally connected, the cable P becomes tangled and troublesome at the time of transfer and installation, and the workability is poor.
[0007]
This invention makes it a subject to solve the troublesomeness.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention connects the terminal box and the external connection cable via a connector. Since the connector can be disconnected freely, it can be transferred and installed with the terminal box and the cable disconnected.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
As an embodiment of the present invention, a pair of terminal plates to which a positive electrode and a negative electrode of a solar cell module are connected are disposed in a resin box body, and an external connection cable is connected to the side wall of the box body. A structure in which a connector is integrally provided by insert molding and the terminal of the connector and the terminal plate are connected may be employed.
[0010]
In this configuration, when the molding temperature of the box body molding resin is higher than the heat resistance temperature of the connector (housing), a burr stop ring that covers that portion may be fitted to the insert portion of the connector. In this way, when the box body is molded, heat conduction is suppressed by the ring to prevent deformation of the connector, and there is no gap with the mold due to the deformation, and burrs generated by the gap are generated. Also disappear.
[0011]
【Example】
An embodiment is shown in FIG. 1 to FIG. 6, and a pair of terminal plates 20 and 20 to which a plus electrode a and a minus electrode a of a solar cell module M are connected are placed in a rectangular box body 11 made of ABS resin at the top opening. They are arranged in parallel. The electrodes a and a are soldered to the middle 21 of the terminal board 20 through the through holes 11a. The terminal plate 20 is connected to the terminal 41 of the male connector 40 at one end 20 a thereof. The male connector 40 and the terminal plate 20 are inserted when the main body 11 is molded. A backflow prevention bypass diode 3 is soldered between the terminal plates 20 and 20 as necessary. The diode 3 may be attached after the terminal board 20 is inserted or before the insertion. A cover 30 made of a thermoplastic elastomer such as silicon rubber is fitted to the upper opening of the box body 11 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 with the adhesive tape 12 on the back surface.
[0012]
The male connector 40 has a male terminal 41 inserted on a central axis of a cylindrical housing 42 formed of a hard resin such as xylon (trade name) or nylon. When the male connector 40 is inserted at the time of resin molding of the terminal box body 11, the cylindrical deburring ring 50 shown in FIG. 6 is fitted into the insert portion of the housing 42. The burr stop ring 50 suppresses heat conduction from the molding resin when the box body 11 is molded, prevents deformation of the housing 42, and does not cause a gap with the molding die due to the deformation. No burr occurs.
[0013]
The 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 crimped and connected to the female terminal 61, and a connection sleeve 63 is internally provided.
[0014]
The terminal box B of this embodiment is attached to the back surface of the module M by adhesive fixing while maintaining the water tightness by the sealing material, as shown in FIG.
[0015]
7 to 10 show other embodiments. In the embodiment shown in FIG. 7, the box body 11 is a long object, and the terminal plate 20, the bypass diode 3 and the male connector 40 are connected in series in the length direction. Are arranged. The parallel number of the diode 3 and the terminal plate 20 is arbitrary, and for example, 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.
[0016]
In each of the above embodiments, the bypass diode 3 is provided, but the diode 3 can be omitted if the backflow prevention is not required. Moreover, it can replace with the male connector 40 and the female connector 60 shown in FIG.4 and FIG.5 can also be integrated with the box main body 11. FIG. Furthermore, the connector integrated with the box main body 11 can be a male and female connector, and can be not only one pole but also a multipolar connector such as two poles.
[0017]
【The invention's effect】
According to the present invention, since the connector for connecting the cable is integrally provided on the box body as described above, there is no fear that the cable may be entangled when the box body is transferred and installed, and the workability is improved.
[Brief description of the drawings]
FIG. 1 is a front view of a connection state with a cable according to an embodiment. FIG. 2A is a right side view of FIG. 1, and FIG. FIG. 4B is a back view of the same embodiment. FIG. 5A is a front view of the male connector housing, and FIG. 5B is a front view of the female connector housing. Fig. 6 is a perspective view of a burr stop ring. Fig. 7 is a perspective view of another embodiment. Fig. 8 is a main part 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 usage diagram of each embodiment. FIG. 12 is a usage diagram of each embodiment. ] Schematic diagram of a solar power generation system [FIG. 14] Exploded perspective view of a conventional example [FIG. 15] (a) is a plan view thereof, (b) is a right vertical sectional view [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 11 Box body 2, 20 Terminal board 3 Bypass diode 30 for backflow prevention Cover 40 Male connector 41 Male terminal 42 Male connector housing 50 Deburring ring 60 Female connector 61 Female terminal 62 Female connector housing a Electrode B terminal of solar cell module Box M Solar cell module P External connection cable

Claims (1)

In the resin box main body (11), a pair of terminal plates (20, 20) to which the positive electrode (a) and the negative electrode (a) of the solar cell module (M) are connected are disposed, and the box main body ( 11) a male connector (40) for connection of the external connection cable (P) or a female connector (60) is integrally provided on the side wall of the connector by insert molding, and the terminal (41, 61) of the connector and the terminal plate (20) ) connect, and said connector (40, 60) in the insert portion of the burr retaining ring (50) is fitted is to that solar cell module terminal box, characterized in that are covering the portion thereof.

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