JPS63278279A - Solar battery module - Google Patents

Abstract

PURPOSE:To make the structure of an interconnector simple and to easily execute a connection operation by a method wherein solar battery cells of two mutually different P-on-N type and N-on-P type are connected in series alternately. CONSTITUTION:Many pieces of solar battery cells 1a of a P-on-N type and solar battery cells 1b of an N-on-P type are arranged alternately; a sheet of cover glass 3 is glued to the surface of the individual cell by using an adhesive 2. Furthermore, at these solar battery cells 1a, 1b a lower electrode of the first solar battery cell 1a is connected, by using an interconnector 4, to the lower electrode of the second solar battery cell 1b which is adjacent to the cell and whose type is different from that of the cell. After that, upper electrodes and the lower electrodes of the two adjacent solar battery cells 1a, 1b of different types are connected in turn alternately; by this setup, solar battery cells 1a, 1b of the prescribed number are connected in series. These more than two series-connected solar battery cells 1a, 1b are arranged of a substrate 6 and fixed by using an adhesive 5, and a solar battery module is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connection structure for solar cells in a solar cell module.

[Conventional technology]

Figure 3 shows [GaAs Interconnect De
sign and Weld Technology:1
8th IEEE PVSC-1985J is a cross-sectional view showing the structure of a conventional solar cell module disclosed in 8th IEEE PVSC-1985J. A solar cell of one of the N-on-P type (the figure shows the P-on-N type) in which a layer is formed, and a cover glass 3 is attached to each surface with an adhesive 2. . Further, these solar cells 1 of the same type connect the upper electrode of the first solar cell 1 to the lower electrode of the second solar cell 1 through the interconnector 4, and then connect the upper electrode of the first solar cell 1 to the lower electrode of the second solar cell 1. One upper electrode and the other lower electrode of adjacent solar cells 1 are sequentially connected, such as connecting the upper electrode of the solar cell 1 to the lower electrode of the third solar cell 1, and so on. A predetermined number of solar cells 1 are connected in series. A solar cell module is constructed by arranging and fixing a plurality of these series-connected solar cells 1 on a substrate 6 with an adhesive 5.

[Problem that the invention seeks to solve]

Conventional solar cell modules have a configuration in which a large number of the same type solar cells 1 of the above J:P-on-N type or N-on-P type are connected in series, so one side between adjacent solar cells 1 The upper electrode of the interconnector 4 must be connected to the lower electrode of the other, and it is not only difficult to connect these two electrodes with the ink connector 4, which has a large step corresponding to the thickness of the cell, but also the interconnector 4. There was also the problem that the structure was complicated.

This invention was made to solve this problem, and provides a solar cell module that has a simple structure of an ink connector that connects a large number of solar cells in series, and that allows for easy connection work. The purpose is to obtain.

[Means for solving problems]

The solar cell module according to the present invention has different P
Two types of solar cells, on-N type and N-on-P type, are alternately connected in series.

[Effect]

In this invention, since two adjacent solar cells are of different types, these two solar cells are connected in series by connecting their upper electrodes or lower electrodes.

〔Example〕

FIG. 1 is a cross-sectional view showing one embodiment of a solar cell module according to the present invention. In the figure, 1a is a P-on-N type solar cell in which a P layer is formed on an N layer, and 1b is a P-on-N type solar cell cell in which a P layer is formed on an N layer. This is an N-on-P type solar cell with an N layer formed on top, and a large number of these two different types of solar cells 1a and lb are arranged alternately, and their surfaces are individually bonded with an adhesive 2. A cover glass 3 is attached to each.

Furthermore, these solar cells 1a and 1b are connected by an interconnector 4 to the lower electrode of the first solar cell 1a and the lower electrode of a second solar cell 1b adjacent to this cell and of a different type. Next, the upper electrode of the second solar cell 1b is connected to the upper electrode of a third solar cell 1a which is adjacent to this cell and is of a different type. The lower electrode of two adjacent solar cells 1a and 1b of different types is connected, such as connecting the lower electrode of the solar cell 1a to the lower electrode of a fourth solar cell 1b adjacent to this cell and of a different type. The upper electrodes and the lower electrodes are sequentially and alternately connected to each other, thereby connecting a predetermined number of solar cells la and 1b in series. A plurality of solar cells 1a are connected in series.

1b are arranged and fixed on a substrate 6 with an adhesive 5, thereby constructing a solar cell module.

In the solar cell module configured as described above, adjacent solar cells 1a and 1b are connected in series by connecting their upper electrodes or lower electrodes with no step difference using ink connectors 4. . For this reason, the ink connector 4 does not need to have a complicated bent shape, such as forming a curved protrusion above the cells to relieve stress between the cells, but may have a simple flat shape. Furthermore, since the ink connector 4 is connected by passing the rack between two electrodes located on the same plane, the connection work does not take much time.

FIG. 2 shows two different types of solar cells 1a,
Each photovoltaic cell (generally, a plurality of photovoltaic cells) 1a is connected by alternately connecting the photovoltaic cells 1a in series, making use of the fact that the interconnector 4 has a simple shape, that is, there is no protrusion toward the top of the cell.

1b is a sectional view showing an embodiment in which the light-receiving surface of each solar cell 1b is collectively covered with a single cover glass (generally a transparent covering plate) 3, and the cover glass 3 covers each solar cell 1a, 1b.
It is pasted on the surface with adhesive 2. In this case, the cover glass 3 is attached to a large number of solar cells 1a.

This is done after 1b is connected in series. In the solar cell module configured in this way, the cover glass 3
Since it is not necessary to individually attach the photovoltaic cells 1a and 1b to each of the solar cells 1a and Ib, the process is greatly simplified.

In each of the above embodiments, a configuration was described in which the lower electrodes were connected to each other by the ink connector 4, but the lower electrodes were connected to each other by electrodes printed on the board 6 without using the interconnector 4. It's okay. In addition, a large number of solar cells la, 1b are arranged on one cover glass 3.
In the case of the second embodiment, in which the ink connector 4 for the upper electrode is connected to each other by an electrode printed on the back surface of the cover glass 3,
may be omitted.

〔Effect of the invention〕

As described above, according to the present invention, since two different types of solar cells are alternately connected in series,
Adjacent solar cells only need to be connected by their upper electrodes or lower electrodes, which simplifies the structure of the ink connector that connects two electrodes, and makes the connection process easier. is obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a sectional view showing another embodiment of the invention, and FIG. 3 is a sectional view showing a conventional example. In the figure, 1a is a P-on-N type solar cell, 1b is an N-on-P type solar cell, and 4 is an ink connector. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A solar cell module characterized in that P-on-N type and N-on-P type solar cells are alternately connected in series. (2) The solar cell module according to claim 1, wherein the light-receiving surfaces of the plurality of solar cells are covered with a single transparent covering plate.