JP2002026361A - Double-sided photovoltaic module - Google Patents

Abstract

(57) [Summary] To reduce the cost of a solar cell module. A back surface, which is a positive electrode of a double-sided solar cell, and a surface facing the back surface are alternately arranged so that the same surface of the solar cell module faces. [Effect] The structure is simplified, the number of steps in manufacturing the solar cell module is reduced, and the causes of defects are reduced, so that the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided solar cell module.

[0002]

2. Description of the Related Art As shown in a plan view of FIG. 2A and a cross-sectional view taken along the line AA 'of FIG. The first light-receiving surface 12 of the plurality of double-sided light-receiving solar cells on the first electrode 7 side of the first polarity is connected to the first light-receiving solar cell module of the double-sided light-receiving solar cell module.
, Ie, a plurality of double-sided light receiving solar cells are arranged in the same direction. Such a double-sided light receiving solar cell module is disclosed in
-101122.

[0003]

In the conventional double-sided photovoltaic module as described above, the first double-sided photovoltaic cell connected in series is located on the first module light-receiving surface 10 side of the first double-sided photovoltaic module. Electrode 7 and the second
It is necessary to connect the second electrode 8 located on the module light receiving surface 11 side with the inter-cell wiring 5 which is bent.
For this reason, it may be a factor of an increase in man-hours at the time of manufacturing the solar cell module or a decrease in yield due to a defect.

[0004]

A solar cell module according to the present invention includes a solar cell of a double-sided light receiving type, and a plurality of the solar cells are arranged with their front and back surfaces alternately facing one side.

That is, a double-sided light receiving solar cell module has a first electrode having a first polarity on a first surface and a second electrode having a second polarity on a second surface facing the first electrode. Wherein the first surface is the first
The two-sided light-receiving solar cell facing the module light-receiving surface side and the two-sided light-receiving solar cell with the second surface facing the first module light-receiving surface are electrically connected in series to each other. Can solve the above problem.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) Embodiment 1 will be described with reference to FIG.

FIG. 1A is a partial plan view of a double-sided solar cell module according to one embodiment of the present invention, and FIG.
Indicates an AA 'cross section. In the present solar cell module, a plurality of double-sided silicon solar cells 2
Are the front flat glass 1 and the rear flat glass 3 that transmit light.
Sandwiched between The front and rear flat glass plates 1 and 3 and the solar cell 2 are bonded to each other by a sealing and bonding synthetic resin 4 that transmits light. Dual-sided solar cell 2-1
In the pair 2-2, the double-sided solar cell 2-1 uses the negative first electrode 7 and the double-sided solar cell 2-2 uses the positive second electrode 8 in the first module light-receiving surface 10, They are arranged facing the same module light receiving surface. A plurality of solar cells are electrically connected in series by connecting the positive electrode and the negative electrode facing the same surface of these adjacent double-sided light-receiving solar cells with the connection wires 5.

As described above, the adjacent double-sided solar cells are arranged so that the surface having the positive electrode and the surface having the negative electrode face the same surface. It is possible to connect without special bending. Therefore, the structure of the solar cell module according to the present embodiment is simplified as compared with the related art, and the man-hours and the causes of defects during the manufacturing of the solar cell module are reduced, and the cost can be reduced. Further, a gap between two adjacent solar cells can be reduced.

Although the solar cell has not been described in detail in the foregoing description, ordinary single-crystal Si or polycrystalline S
A solar cell manufactured using a crystalline substrate such as i can be used. Furthermore, a-Si, thin-film polycrystalline Si,
Solar cells using GaAs crystal substrates, CIS, Cd
A solar cell using a multi-component material such as Te, a photochemical solar cell using a dye sensitizing action, or the like may be used, and the above effects can be obtained by using the structure of the present invention regardless of the type of the solar cell. Needless to say.

Further, as the configuration of the solar cell module, in the above description, an example is shown in which glass is provided on both light receiving surfaces of the module, but the effect of the present invention does not change even if a material such as plastic is used. The effect of the present invention is not changed even if one of the light receiving surfaces is made of glass and the other is made of plastic.

[0012]

According to the solar cell module of the present invention, the back surface of the solar cell as the positive electrode and the surface of the solar cell as the negative electrode face the same surface, and the positive electrode and the negative electrode facing the same surface are connected in series by an electric wire. This is a connection, and there is no need to bend the electric wire, so that the man-hours and the causes of defects during the production of the solar cell module can be reduced and the cost can be reduced. Further, the gap between two adjacent solar cells can be reduced.

[Brief description of the drawings]

FIG. 1 shows a partial plan view and a cross section of a solar cell module according to an embodiment of the present invention.

FIG. 2 shows a partial plan view and a cross section of an example of a conventional solar cell module.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front side flat glass, 2 ... Solar cell, 3 ... Back side flat glass, 4 ... Synthetic resin for sealing and bonding, 5 ... Connection electric wire, 6 ... Substrate, 7 ... 1st electrode, 8 ... 2nd electrode, 9 ... parallel connection wiring, 10 ... first solar cell module light receiving surface, 11 ... second solar cell module light receiving surface, 12 ... first solar cell light receiving surface, 13 ... second solar cell light receiving surface.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshio Shigeru 3-1-1, Komachi, Hitachi, Ibaraki Prefecture F-term in the Nuclear Power Division, Hitachi, Ltd. 5F051 AA02 AA05 AA08 AA09 AA10 AA14 BA11 DA20 EA02 EA20 FA30 GA03 GA04 JA02

Claims (1)

[Claims] A plurality of double-sided solar cells having a first electrode of a first polarity on a first surface and a second electrode of a second polarity on a second surface facing the first electrode are provided. The first
The two-sided light-receiving solar cell whose surface faces the first module light-receiving surface and the two-sided light-receiving solar cell whose second surface faces the first module light-receiving surface are electrically connected in series with each other. A double-sided light receiving solar cell module, which is connected.