JPH04219982A - Solar battery panel and its connection - Google Patents

Abstract

PURPOSE:To prevent an electric shock accident by a method wherein the title panel is constituted in such a way that a short-circuit means is opened of a connecting switch is closed so that a photoelectromotive force can be taken out from output terminals of the panel. CONSTITUTION:A short-circuit means 4 is installed across both + and - output terminals 3 from which electric power generated at a solar battery panel 1 is taken out. A normally-open connecting switch is installed in series with both + and - output terminals 3 from which the electric power generated at the solar battery panel 1 is taken out. The solar battery panel 3 is installed outdoors; the panel is connected electrically; after that, the short-circuit means 4 and the connecting switch are opened and closed by applying an external force. Thereby, it is possible to completely eliminate an electric shock accident when the solar battery panel installed outdoors is connected electrically.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell panel that is installed outdoors to generate high-power photovoltaic power, and a method for connecting the same.

0002

BACKGROUND OF THE INVENTION In recent years, due to global environmental issues, great expectations have been placed on solar cells that can be installed outdoors to generate high-power photovoltaic power. As a familiar application, a concept has been proposed in which solar cells are installed on the roofs of ordinary homes and the generated power covers most of the electricity consumed during the day, and some are on the verge of being put into practical use, albeit on a trial basis.

[0003] In systems for general households, approximately 1 to 2 kW of power is required to be generated by solar cells.

0004

[Problem to be solved by the invention] However, since solar cells generate electricity when exposed to sunlight, when the solar panels are carried up to the roof to install the solar cells, the solar cells automatically generate electricity. It starts at a certain point. Therefore, as described above, the wiring work that is performed after installing a high-power solar cell panel having a photovoltaic force of about 1 to 2 kW must be performed in a energized state, which is extremely dangerous. Especially since the power generated from solar cells is direct current,
It is more dangerous than alternating current.

[0005] The solution is as follows: 1. Perform wiring work at night when there is no sunlight; 2. One possible method is to pay close attention to the wiring to prevent electric shock accidents.

However, 1. Method (2) requires nighttime work, which not only does not improve efficiency, but also increases the risk of other accidents such as falling off the roof. Although this method is not possible for skilled workers, it is impossible for workers with a low level of knowledge in the field and cannot be said to be a general method.

[0007]

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned problems, and provides short-circuiting means across both the + and - output terminals for extracting power generated by a solar panel. In addition, a connection switch was installed in series with both the + and - output terminals for extracting the power generated by the solar panel, and the solar panel was installed outdoors and the electrical connection to the panel was completed. Later, an external force is applied to the short-circuiting means or connection switch to open or close it.

[0008]

[Operation] Since the photovoltaic force is taken out from the output terminal of the panel only by opening the short-circuiting means or closing the connection switch, it is possible to prevent electric shock accidents during panel connection work.

[0009]

Embodiment FIG. 1 is a perspective view of a solar cell panel 1 of the present invention, which has a large number of solar cells 2, 2, . . . made of single crystal, polycrystal, or amorphous material. There is. Reference numerals 3 and 3 denote + and - output terminals for taking out the power generated by the solar cell panel 1, which are connected in series, parallel, or series-parallel with each cell 2, 2, . . . . 4 is a shorting means provided across both output terminals 3, 3,
It is composed of a resin piece 5 provided to bridge both output terminals 3, 3, and a shorting line 6 buried within this resin piece 5 to electrically short-circuit both output terminals 3, 3. Furthermore, this resin piece 5 is provided with grooves 7, 7 that can be easily cut when an external force is applied to the resin piece 5 using a hammer or the like.

[0010] This will be explained in more detail by citing specific numerical values. For example, in the case of a solar panel made of crystalline material and measuring 120 cm long and 40 cm wide, the voltage is 16 V, 3
It is said to have a rated output of about 48W at A. In the case of such a panel, the short-circuit wire 6 that electrically bridges the output terminals 3 and 3 has a diameter of about 0.0 mm and can withstand a current of 3 A.
An 8 mm tin-plated copper wire is used, and as the resin piece 5 this shorting wire 6 can be cast, for example, with a thickness of 2 mm.
, the width is selected to be approximately 10 mm.

FIG. 2 shows another embodiment of the panel 1 of the present invention, in which a lead wire system is adopted as the + and - output terminals 3, 3, and the shorting means 4 is provided on one side of the panel 1. It is composed of an extended resin piece 5 and a shorting wire 6. Of course, in this case as well, it is desirable to provide grooves 7, 7 in the resin piece 5 to facilitate cutting.

FIG. 3 shows an internal wiring diagram of the solar cell panel 1 shown in FIGS. 1 and 2.
, 2... Both ends of the power generation section 8 are connected to output terminals 3, 3.
The shorting wire 6 of the shorting means 4 is connected across both terminals 3, 3.

FIG. 4 shows still another embodiment of the panel of the present invention. In the case of the embodiments shown in Figures 1 and 2, the solar panel 1
In this embodiment, as shown in FIG. 5, both the power generation part 8 and the solar panel 1 are A connection switch 9 inserted in series with the output terminals 3, 3 is provided. And this connection switch 9 is panel 1
The output terminals 3 and 3 are extended to the sides of the panel, and are normally in an open state.
No power is output to the switch 9, and power is output only when this switch 9 is turned on. To give a specific example of this connection switch 9, as shown in FIG. , 11 are fitted by applying external force,
Becomes electrically conductive.

Next, after installing a large number of the solar panels 1 shown in FIGS. 1, 2, and 4 on a rooftop or other location that receives plenty of sunlight, the panels 1, 1, . . . This section explains how to connect to.

FIG. 7 shows a connection method for the solar cell panels shown in FIGS. 1 and 2.
1... at a predetermined location such as the rooftop, and at the same time electrically connect the output terminals 3, 3 of each panel 1, 1... in series or parallel as appropriate, and at the same time, place it inside the house, for example. Wiring is performed for the installed air conditioner and other loads 12. When the predetermined electrical connection work is completed, the resin piece 5 in which the shorting wire 6 of the shorting means 4 is cast is broken by applying a momentary large external force to the cut grooves 7, 7 and its vicinity with a hammer or the like, and at the same time, the short circuit is made. By electrically cutting line 6, load 1
Start supplying power to 2.

FIG. 8 shows a method of connecting the panels shown in FIG. A momentary large external force is applied to 10 and 11 with a hammer or the like to fit the tongue pieces 10 and 11 together to electrically connect them, and the power generated by the solar panels 1, 1, . . . is transferred to the load 12. supply

Electrical connections between the solar battery panels 1, 1, . . . and to the load 12 are made through the output terminals 3, 3, and 3 of each panel 1, 1, . 3
Since there is no electrical output, there is no risk of electric shock during the connection work, and even an unskilled worker can perform the connection work.

[0018] Generally, when cutting a conducting wire that is energized or connecting a conducting wire that has a potential difference, an arc occurs at that point, and this phenomenon is often noticeable especially in the case of direct current. Are known. Therefore, such disconnection and connection are considered to be dangerous.

However, in the present invention, the cutting and connecting are performed by instantaneous large external force using a hammer or the like, so the danger associated with arc generation is eliminated.

[0020]

Effects of the Invention As is clear from the above description, the present invention is capable of extracting power generated by a solar panel.
A short circuit is provided across both output terminals, and a normally open connection switch is provided in series with both the + and - output terminals to take out the power generated by the solar panel, and the solar panel is installed outdoors. After completing the electrical connection to the panel, external force is applied to the short-circuiting means and connection switch to open and close the panel, so there is no risk of electric shock when electrically connecting a solar panel installed outdoors. At the same time, the structure for preventing electric shock accidents is simple, the cost burden is low, and the method of supplying power to the load after panel connection, that is, starting up the system, is extremely simple. It's easy and requires no skill at all.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a solar cell panel of the present invention.

FIG. 2 is a perspective view of another embodiment of the solar cell panel of the present invention.

FIG. 3 is an internal wiring diagram of the solar cell panel shown in FIGS. 1 and 2. FIG.

FIG. 4 is a perspective view of still another embodiment of the solar cell panel of the present invention.

FIG. 5 is an internal wiring diagram of the solar cell panel shown in FIG. 4.

FIG. 6 is an enlarged sectional view of a main part of the solar cell panel shown in FIG. 4.

7 is a circuit diagram showing a connection state of the solar cell panels shown in FIGS. 1 and 2. FIG.

8 is a circuit diagram showing a connection state of the solar cell panel shown in FIG. 4. FIG.

[Explanation of symbols]

1. Solar panel 3 Output terminal 4 Short circuit means 8　　　　Power generation part 9 Connection switch 12 Load

Claims (8)

[Claims] [Claim 1] In a solar cell panel installed outdoors to generate high-power photovoltaic power, a shorting means is provided across both output terminals for taking out the electric power generated by the panel. A solar cell panel characterized in that the short circuit means is opened by applying an external force from outside the panel. 2. The solar cell panel according to claim 1, wherein the short-circuit means comprises a short-circuit wire extending outside the panel, and the short-circuit wire is cut by applying an external force to the extended portion of the short-circuit wire. . 3. The shorting wire is integrally buried in a resin piece extending from the panel, and the resin piece is configured to be cut together with the buried shorting wire by applying an external force. The solar cell panel according to claim 2, characterized in that: 4. The solar cell panel according to claim 3, wherein the resin piece is provided with a groove to facilitate cutting thereof. 5. In a solar cell panel that is installed outdoors to generate high-power photovoltaic power, a normally open connection switch is connected in series to both the + and - output terminals for taking out the power generated by the panel. A solar cell panel characterized in that the connection switch is configured to be closed by applying an external force from outside the panel. 6. The connection switch according to claim 5, wherein the connection switch is composed of concave and convex tongues made of a conductive material facing each other at a distance, and the switch is closed by fitting the tongues together using an external force. solar panels. 7. A system in which a solar panel that generates high-power photovoltaic power is installed outdoors, and the photovoltaic power is led to a load side for consumption. 5. A method for connecting a solar cell panel according to claim 4, further comprising applying an external force to the shorting means to open the short circuit after wiring the output terminal of the solar cell panel to the load side. 8. A system in which a solar cell panel that generates high-power photovoltaic power is installed outdoors, and the photovoltaic power is led to a load side and consumed, according to claim 5 or 6. A method for connecting a solar cell panel, characterized in that after wiring the output terminal of the solar cell panel to the load side, an external force is applied to the connection switch to close the connection switch.