JPH0555618A - Solar battery generator - Google Patents

Abstract

PURPOSE:To interconnect numerous solar battery wafers attached to a surface of a flat tile of slate type with little electric loss and also efficiently take out electric power obtained from a plurality of flat tiles shingled on a roof. CONSTITUTION:Crystal solar battery wafers 2 which generate electricity when they receive application of sunlight are laterally arranged in an even number of rows at a lower position when flat tiles are shingled on a roof, while the respective solar battery wafers 2 are electrically connected in series mainly in a lateral direction. The respective solar battery wafers 2 which have been arranged in an even number of rows in a lateral direction are connected in series in a vertical direction only on one side end row, while the remaining wafers 2 are connected in series in a lateral direction and they are alternately connected vertically at each of row ends to have the remaining wafer rows connected in series. A pair of positive and negative output terminals are led out from an optional position of the solar battery wafer row, while further a fixing means for fixing the tile is provided on an upper position of the flat tile.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell power generation device which is arranged on a roof of a house to generate solar power, and in particular, provides a method for electrically connecting each wafer when a crystalline solar cell wafer is used. To do.

[0002]

2. Description of the Related Art As a solar cell for arranging solar power on a roof of a house of a general household, a Japanese roof tile type solar cell panel having the same curved shape as the Japanese roof tile arranged on the roof of a normal house. Then, a slate roof tile type having a flat surface like a slate roof tile has been proposed.

[0003]

Since the Japanese tile type can be directly replaced with the ordinary Japanese tile, no special consideration is required for installation on the roof, while the solar cell light receiving surface has a curved shape. Therefore, the manufacturing process becomes complicated and there is a difficulty in cost.

On the other hand, since the slate roof tile type has a flat light-receiving surface, it is said that a solar cell can be easily formed and is suitable for practical use. In the case of the slate tile type, instead of directly forming the solar cell on the flat tile itself, a method of attaching a large number of solar cell wafers completed in advance as solar cells on the roof surface or the back surface is adopted. It is common.

However, when a large number of solar cell wafers completed as solar cells are attached to the surface of a flat roof tile, etc., electrical loss occurs unless electrical connection is efficiently made between the solar cell wafers. At the same time, the position of the output terminal for taking out the electric power generated by each solar cell wafer from the roof tile is also a problem, and it is also related to the electrical connection between the roof tiles.

[0006]

The present invention has been made to solve the above problems, and in a roof structure in which flat tiles of a slate tile type are roofed, the flat tiles are the tiles. The crystalline solar cell wafers that generate power when exposed to sunlight at the lower position when the roof is roofed are arranged in even rows in the horizontal direction, and the solar cell wafers are mainly electrically in the horizontal direction. Each of the solar cell wafers connected in series and arranged in an even number row in the horizontal direction is connected in series in the vertical direction only on one side end row thereof, and the remaining wafers are connected in series in the horizontal direction,
In order to connect the remaining wafer rows in series, they are alternately connected up and down at each end row position, a pair of positive and negative output terminals are derived from any position of the solar cell wafer row, and further on the upper side of the flat roof tile. A fixing means for fixing the roof tile is provided.

[0007]

According to the present invention, electrical connection between the crystalline solar cell wafers provided on the lower side of the flat roof tile can be easily performed, and a pair of positive and negative output terminals are derived from arbitrary positions in the wafer row. be able to.

[0008]

1 and 2 are a plan view of a slate roof tile type flat roof tile used in a solar cell power generator of the present invention and a cross-sectional view of an essential part thereof, in which 1 is a transparent glass substrate, which is usually strengthened. Glass is adopted. As an example of the size of the substrate 1, a long piece is about 90 cm, a short piece is about 40 cm, and a thickness is about 6 cm.
It is about mm. 2 are a plurality of solar cell wafers adhered from the rear side along the lower side of the long piece of the substrate 1, and are crystalline solar cells such as polycrystalline silicon or single crystal silicon. It is composed of batteries. As is apparent from FIGS. 1 and 2, the solar cell wafers 2, 2, ... Are provided only below the lower half of the substrate 1. The reason why the adhesion area of the solar cell 2 is less than or equal to 1/2 of the lower side of the entire surface of the substrate 1 is as follows.

That is, in general, slate tiles made of flat plates are arranged in a zigzag pattern in order to prevent rain leaks from the joints in the horizontal direction and the joints in the vertical direction. This is because the exposed portion on the roof surface is 1/2 or less of the lower side of the entire roof surface.

Returning to FIG. 1, 3 and 3 are roof tile fixing means provided on the upper portion of the flat roof tile substrate 1 where the solar cell wafers 2, 2, ... Are not provided. The mounting pieces are fixed to the back surface side of the substrate 1 at a position of about 1/4 from both end surfaces with an adhesive or the like, and have a length of 20 to 4
It is composed of a metal plate such as iron having a width of 0 cm, a width of 3 and 4 cm, and a thickness of 3 to 4 mm. Then, as shown in FIG. 3, the flat roof tiles are attached in a zigzag manner to the crosspieces 20, 20, ...
When the flat roof tiles are thus attached to the crosspieces 20, 20, ... If the attachment pieces 3 and 3 are provided at positions of about 1/4 from both end faces of the substrate 1, respectively, the attachment pieces 3 adjacent to each other. , Can also be used as the crosspieces for fixing 3, and the roof tile mounting structure can be simplified.

Next, the solar cell wafers 2, 2, ... Will be further described. Solar cell wafer 2, 2, ...
.. are arranged in an even number of rows (four rows in this embodiment) in the lateral direction at ½ or less of the entire surface of the substrate 1, and the respective solar cell wafers 2, 2 ... Are electrically connected in series. Specifically, only one of the side end rows is in the serial connection state 4 in a straight line in the vertical direction,
The remaining wafers 2, 2 ... are horizontally connected in series 5,
In order to connect the remaining wafer rows in series, the other wafer row rows are alternately connected up and down 6, 6, 6.

A pair of positive and negative output terminals 7 for extracting electric power from the solar cell wafers 2, 2, ... Connected in series as described above are led out from arbitrary positions of the solar cell wafers 2, 2 ,. There is. That is, all of these solar cell wafers 2, 2, ... Are connected in series so as to form a closed loop, so if the loop is cut, the cut point immediately becomes a pair of positive and negative output terminals 7, and as a result, A pair of positive and negative output terminals 7 can be derived from any portion of the solar cell wafers 2, 2, ... Therefore, the output terminal 7 can be provided at a convenient place when the roof is roofed by using a large number of flat tiles of the slate tile type provided with such solar cell wafers 2, 2 ... In addition to improving the efficiency of the roofing work, the roof tiles can be easily connected to each other, and the work efficiency of the connection can be improved, and at the same time, the connection loss can be reduced.

The structure for mounting the solar cell wafer 2 on the transparent glass substrate 1 will be described with reference to the enlarged sectional view of FIG. A solar cell wafer 2 is provided on the back surface of the substrate 1 with a thin film 8 of EVA (ethylene vinyl acetate) interposed therebetween.
And the back surface of the solar cell wafer 2 is covered again with a thin film 8 of EVA, and then covered with a back surface protective film 9 having a structure in which an aluminum thin film is sandwiched with a PET (polyethylene terephthalate) film. There is. Needless to say, sunlight 10 for photovoltaic power generation is emitted from the glass substrate 1 side.

Although a transparent glass substrate is used as the flat roof tile substrate in the above-described embodiments, the present invention is not limited to a transparent material, and an opaque material such as slate can be used in the present invention. That is, when the substrate 1 is made of an opaque material, as shown in FIG. 5, the solar cell wafers 2, 2, ... Are provided on the front surface side of the substrate and the light receiving surface for receiving the sunlight 10 from the front surface side. And In the case of such a configuration, the solar cell wafer 2 is located on the surface side of the flat roof tile as is clear from the figure, so it is necessary to focus on the surface protection. Therefore, EVA is applied to the surface of the solar cell 2.
In addition to the thin film 8, a configuration in which a thin transparent protective glass 11 different from the flat roof tile substrate is arranged can be considered.

[0015]

As is apparent from the above description, the present invention provides a crystalline solar cell wafer that generates power when sunlight is applied to the lower position of a flat roof tile of slate type when it is roofed. The solar cell wafers are arranged in even rows in the lateral direction, and the solar cell wafers are mainly electrically connected in series in the lateral direction, and the solar cell wafers arranged in the even row in the lateral direction have one side end thereof. Only the rows are connected in series in the vertical direction, the remaining wafers are connected in series in the horizontal direction, and the remaining wafers are connected in series at the end row positions alternately so as to connect the remaining wafer rows in series. A pair of positive and negative output terminals are led out from an arbitrary position of the wafer row, and a fixing means for fixing the flat roof tile is provided on the upper side of the flat roof tile. Connection can be made with less electrical loss, and a pair of positive and negative output terminals are provided at a convenient place when roofing using a large number of slate tile type flat tiles provided with such solar cell wafers. It is possible to improve the efficiency of the roofing work, as well as to easily connect the tiles to each other, and at the same time improve the connection work efficiency.
It is possible to reduce connection loss, and there are many places where it contributes to the practical application of slate roof tile type solar power generation.

[Brief description of drawings]

FIG. 1 is a plan view of a flat roof tile used in the solar cell power generator of the present invention.

FIG. 2 is a cross-sectional view of a flat roof tile used in the solar cell power generation device of the present invention.

FIG. 3 is a perspective view showing the configuration of the solar cell power generation device of the present invention.

FIG. 4 is an enlarged cross-sectional view of a main part of a flat roof tile used in the solar cell power generator of the present invention.

FIG. 5 is an enlarged cross-sectional view of a main part of another embodiment of the flat roof tile used in the solar cell power generator of the present invention.

[Explanation of symbols]

 1 substrate 2 solar cell wafer 3 mounting piece 20 field plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Miyoshi Onishi 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Yasuo Kishi 2-18 Keiyo Hondori, Moriguchi City, Osaka Sanyo Electric Within the corporation

Claims (1)

[Claims] 1. In a roof structure in which flat tiles of a slate tile type are roofed, the flat tiles are crystalline solar cells that generate power when the roof tiles are exposed to sunlight at a position below the roof tiles. The wafers are arranged in even rows in the lateral direction, and the respective solar cell wafers are mainly electrically connected in series in the lateral direction. Only the side end rows are connected in series in the vertical direction, the remaining wafers are connected in series in the horizontal direction, and the remaining wafer rows are connected alternately in the upper and lower portions at each end row position so as to connect the remaining wafer rows in series. A pair of positive and negative output terminals are led out from any position of the solar cell wafer row, and a fixing means for fixing the flat roof tile is provided on the upper side of the flat roof tile. Place