JP2544264Y2 - Terminal box for solar panel - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell, particularly to a solar cell panel for electric power, and a connection terminal for connecting one panel or a plurality of panels to form a large-area solar cell array. The present invention relates to a terminal box for accommodating the like.

[0002]

2. Description of the Related Art A conventional solar cell panel terminal box employs a waterproof structure that is sealed from the outside world because solar cells are generally installed outdoors.

In this box, in addition to lead wires for connecting adjacent panels, a reverse voltage is applied to each solar cell panel (for example, formation of a hot spot generated when a shadow is formed on the panel). ) Is accommodated. In the case of a closed box, the temperature inside the box approaches the temperature of the solar cell on the surface of the solar cell during power generation of the solar cell, so that the temperature becomes high (about 70 ° C. in midsummer).

Due to the characteristics of the bypass diode, when the ambient temperature rises, the current capacity (withstand current) flowing through the diode is increased.
Operating temperature of 7 to protect solar cells
Performing the correction at 0 ° C. requires a large-capacity bypass diode. For this reason, there is a problem in that when using a diode which can be used at 25 ° C. to perform correction at an operating temperature of 70 ° C., several bypass diodes must be connected in parallel.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and increases the heat radiation efficiency of a bypass diode in a terminal box for a solar cell panel to increase the temperature. And to reduce the temperature correction value so that the solar cell can be protected even by a small-capacity diode.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an output terminal is provided on the back surface of a solar cell panel for guiding its output to the outside, and the solar cell is provided when a reverse voltage is applied to the solar cell. in the solar cell panel terminal <br/> box waterproof housing a diode for bypass that short-circuiting between the output terminals which, the heat radiating portion to the terminal box is provided to attach the diode to the heat radiating portion It is.

[0007]

The temperature rise of the diode is efficiently released to the outside by the heat radiating portion , and the temperature rise of the diode itself can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the terminal box for a solar cell panel according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an external perspective view of a solar cell panel, and FIG.
Also shows a side view. In these figures, reference numeral 1 denotes a solar cell panel having a solar cell module (not shown) mounted on its surface, and 2 denotes a terminal box made of a synthetic resin attached to the back surface of the panel to have a waterproof structure.

[0010] 31 and 32 were positive and negative output terminals of the solar cell provided on the back surface of the panel 1 in the terminal box 2, 4 provided on one side of the terminal box 2 radiator
In this embodiment, the heat radiating fins
Consists of boards. Reference numeral 5 denotes a bypass diode for protecting the solar cell module, which is attached to the heat radiating section 4.
ing. 61 , 62 are the bypass diodes 5;
And the output terminals 31 and 32.

In the solar cell panel 1 having the above-described structure, while the solar cell generates power by receiving sunlight, the panel 1 absorbs heat energy of the sun and its temperature rises. Accordingly, the internal temperature of the terminal box 2 attached to the back surface of the panel 1 increases, so that the ambient temperature of the diode 5 in the box 2 increases, and the temperature of the diode 5 itself increases. I do.

However, in this embodiment, the diode 5
Since it attached to the heat radiating section 4, heat applied to the diode 5 is radiated to the outside air through the heat portion 4 release, temperature rise of the diode 5 becomes gentle than the temperature rise in the terminal box 2.

Therefore, the correction value of the operating temperature becomes smaller,
Even when a diode 5 having a small capacity is used, the current when a reverse voltage is applied can be bypassed. As shown in the equivalent circuit diagram of FIG. 3, the diode 5 is interposed between the positive and negative output terminals 31 and 32 of the solar cell panel 1 and bypasses the generated power when a reverse voltage is applied to the solar cell panel 1. Work.

FIG. 4 is an external perspective view showing another embodiment of a terminal box for a solar cell panel. 1 and 2 is different from the embodiment of FIGS. 1 and 2 in that the heat radiating portion 4 has an air intake 7 exposed on the side surface of the terminal box 2. The point is that heat is released to the outside air via the outside, and the other configuration is the same as the previous embodiment.

In the embodiment shown in FIG.
Temperature rise is radiated to the outside air via the heat radiating portion 4, and the diode 5 having a small capacity can be used.

In each of the above embodiments, it is found that the temperature of the diode rises up to about 70.degree. C. in the former case and the temperature range of the diode without the heat radiating portion 4 is less than 40.degree. Was.

[0017]

According to the present invention, an output terminal provided on the back surface of a solar cell panel for guiding its output to the outside is housed, and between the output terminals of the solar cell when a reverse voltage is applied to the solar cell. in the solar cell panel terminal box of the waterproof structure accommodating the diode bypass shorting the provided heat radiation portions to the terminal box, which has attach the diode to the heat radiating portion, the temperature rise of the diode Since it can be suppressed via the heat radiating portion , it is possible to use a diode having a small capacity, which has an effect of greatly contributing to the miniaturization and sealing of the terminal box.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a terminal box for a solar cell panel of the present invention.

FIG. 2 is a side view showing the terminal box for a solar cell panel.

FIG. 3 is a circuit diagram showing a connection state between a solar cell and a diode.

FIG. 4 is an external perspective view showing another embodiment of the terminal box for a solar cell panel of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solar panel 2 Terminal box 4 Heat sink 5 Diode

Claims (1)

(57) [Scope of request for utility model registration] 1. A bypass which is provided on the back surface of a solar cell panel for guiding its output to the outside and which short-circuits the output terminals of the solar cell when a reverse voltage is applied to the solar cell. in the solar cell panel terminal box of the waterproof structure housing the diodes of use, the terminal board
The heat radiating portion provided in the box, the diode in this heat dissipation portion
Solar panel terminal box, characterized in that Installing attached was.