KR101088006B1

KR101088006B1 - Solar cell modules and manufacturing methods thereof

Info

Publication number: KR101088006B1
Application number: KR20090064979A
Authority: KR
Inventors: 김종일
Original assignee: 광전자 주식회사
Priority date: 2009-07-16
Filing date: 2009-07-16
Publication date: 2011-12-01
Also published as: KR20110007448A

Abstract

The present invention relates to an installation structure of a solar cell module, and more particularly, to a structure for mounting an electrode of a solar cell on a PCB using a conductive tape.

Solar cell module according to the present invention is a printed circuit board; A first contact formed on the printed circuit board; A conductive tape connecting the first contact point and the lower electrode of the solar cell; A conductive tape connecting the upper electrode of the solar cell to a second contact point; And a resin cover layer covering the PCB, the conductive tape, and the solar cell.

In the solar cell module according to the present invention, in order to connect the solar cell and the printed circuit board with the conductive paste, the process of washing and drying the printed circuit board may be omitted, and the short circuit or failure due to the performance degradation of the conductive paste during use is prevented. can do.

Solar modules

Description

SOLAR CELL MODULES AND MANUFACTURING METHODS THEREOF

A solar cell is manufactured by forming a pair of electrodes for output extraction on the main surface of a photoelectric conversion part. Usually, a pair of electrodes is formed in the light incident surface and the back surface of a photoelectric conversion part. In this case, the electrode provided on the light incident surface is formed into a comb shape having a plurality of finger electrodes and busbar electrodes using a conductive paste.

Further, a plurality of solar cells are connected in series by bonding a wiring member through solder on the bus bar electrodes provided on the surface of one solar cell and the bus bar electrodes provided on the back of another solar cell. (See, for example, Japanese Patent Laid-Open No. 2005-217148).

Conventionally, when bonding a wiring material to a busbar electrode with solder, flux is first applied to the surface of the busbar electrode or the cell side surface of the wiring material. Furthermore, after arranging the wiring material on the busbar electrodes, the wiring material is heated. As a result, the solder layer on the surface of the wiring material and the metal part in the busbar electrode are alloyed, and the busbar electrode and the wiring material are adhered with good adhesion.

However, in the above bonding method, the residue of the flux is interposed in the alloy layer of the busbar electrode and the wiring member to form a resistance component. Therefore, there exists a subject that the output of a solar cell module will fall.

The conventional solar cell module manufacturing method is made by connecting the (+) and (-) electrodes of the solar cell to the PCB. Summarizing how to connect the positive electrode, apply the conductive paste to the PCB circuit, put the solar cell on the paste, and leave it at about 150 ℃ for 1 hour in a drying device or using a belt window device. After 5 minutes at ℃, it is attached and melted to combine the solar cell and PCB circuit. In order to connect the negative electrode of the combined solar cell, PV Ribbon Wire is used to make the module by connecting PV Ribbon Wire to the solar cell and PCB circuit.

This manufacturing method requires the cleaning of the PCB substrate to increase the grounding ability of the conductive paste, and also uses soldering. As a result, environmental pollution is caused, and flux is used for soldering, thereby increasing costs and cleaning the environment by thinner or freon cleaning.

Korean Unexamined Patent Publication No. 2009-0057293 proposes a new conductive tape as a way to solve the problem of the solder.

However, in the case of the conductive tape, electricity can be supplied instead of the solder, but the fixing function of the conductive paste cannot be secured, and when the epoxy layer is formed to protect the product, the component contained in the curing epoxy is the conductive tape. It is difficult to solve the problem of dissipation of conductivity, and there is a problem in that an expensive protective layer such as glass must be formed.

Accordingly, there is a continuing demand for a new method for developing a new solar cell that can simultaneously solve the problems of the conductive paste, the solder, and the conductive tape.

The problem to be solved by the present invention is to provide a new solar cell module that is easy to manufacture by connecting the solar cell and the printed circuit board using a conductive tape.

Another problem to be solved by the present invention is to provide a method for easily manufacturing a solar cell module by connecting a solar cell and a printed circuit board using a conductive tape.

Another object to be solved by the present invention is to provide a method for solving the problem that the conductivity of the conductive tape is damaged by the epoxy layer for protecting the solar cell in connecting the solar cell and the printed circuit board using the conductive tape. It is.

In order to solve the above problems, the solar cell module according to the present invention is

Printed circuit board; A first contact formed on the printed circuit board; A conductive tape connecting the first contact point and the lower electrode of the solar cell; A conductive tape connecting the upper electrode of the solar cell to a second contact formed on the printed circuit board; And a resin cover layer.

In the present invention, the conductive tape connecting the first contact and the lower electrode is preferably a double-sided conductive tape so that the solar cell can be bonded to the printed circuit board.

In the present invention, it is preferable to use a conductive tape having a resin resistant property so that the conductive tape can prevent the conductivity of the conductive tape from being damaged during the curing of the resin layer. Preferably, it is preferable to form a block layer in a portion in contact with the resin layer. In the practice of the present invention, a cover such as a film or paper is preferably formed on the conductive tape at a portion where the conductive tape and the epoxy resin contact each other.

According to an aspect of the present invention, there is provided a printed circuit board, comprising: installing a conductive double-sided tape connecting a first contact point and a lower electrode of a solar cell to a printed circuit board; Installing a solar cell; Connecting the upper electrode of the solar cell and the second contact of the printed circuit board with a conductive tape; And forming a surface resin layer.

In the present invention, the conductive tape is characterized in that the cover layer is formed in a portion in contact with the surface resin layer.

In an aspect, the present invention provides a solar cell module in which a solar cell is mounted on a printed circuit board, wherein an upper electrode of the solar cell is connected to a first contact of the printed circuit board with a conductive tape, and a lower electrode of the solar cell is provided. Is connected to the second contact of the printed circuit board by a conductive double-sided tape.

The solar cell module according to the present invention does not use the conductive paste in the manufacturing process, it can prevent the failure due to performance degradation or short circuit of the conductive paste, and also wash and dry the PCB substrate with chemical to use the conductive paste The process of making it can be omitted.

In addition, in the present invention, the problem that the epoxy resin layer used for the solar cell module undermines the conductivity of the conductive tape could be solved.

Hereinafter, the present invention will be described in more detail with reference to Examples.

1 is a process chart showing a manufacturing process of the cross section of the solar cell module according to the present invention. As shown in FIG. 1A, a plurality of first contacts 11 connected to lower electrodes of a solar cell and second contacts 12 connected to upper electrodes are formed on the PCB substrate 10.

Next, as shown in FIG. 1B, a conductive double-sided tape 14 connected to the first contact 11 is attached to the PCB substrate 10.

Next, as shown in FIG. 1C, the solar cell 13 is mounted such that the lower electrode 17 is connected to the first contact 11 through the conductive double-sided tape 14. When the solar cell 3 is fixed to the PCB substrate 10 through the conductive double-sided tape, as shown in FIG. 1D, the upper electrode 18 of the solar cell 13 is connected to the PCB substrate using the conductive tape 15. It connects with the 2nd contact 12 of (10). The cover 16 is formed of paper on the upper surface of the conductive tape 15 to prevent loss of conductivity by epoxy. Next, an epoxy is applied to the uppermost layer to form the protective layer 20.

2 illustrates a cross-sectional view in the direction of line AA ′ of FIG. 1D. As shown in FIG. 2, in the manufactured solar cell module, the solar cell 13 refers to a substrate on which electricity is generated by sunlight. The lower electrode 17 is formed under the solar cell 13, and the upper electrode 18 is formed on the upper surface of the solar cell 13.

The solar cell 13 is fixed to the substrate by the conductive double-sided tape 14 and the conductive tape 15, and is protected by the epoxy layer 20, thereby enabling stable generation of electricity.

In the present invention, the above examples are for illustrating the invention and are not intended to limit the scope of the invention. The scope of the present invention is defined by the claims, and those skilled in the art can also add, substitute, convert, and delete the publicly known arts within the scope of the present invention.

1a to 1b is a process chart showing a manufacturing process of the cross section of the solar cell module according to the present invention.

FIG. 2 is a cross-sectional view in the direction of line AA ′ of FIG. 1D.

Claims

Printed circuit board;

First and second contacts formed on the printed circuit board;

A conductive tape connecting the first contact point and the lower electrode of the solar cell;

A conductive tape connecting the upper electrode of the solar cell to the second contact point; And

A surface resin layer;

The conductive tape connecting the upper electrode to the second contact is a solar cell module, characterized in that the cover layer is formed in a portion in contact with the surface resin layer.

The solar cell module of claim 1, wherein the conductive tape connecting the first contact point and the lower electrode is a conductive double-sided tape.

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The solar cell module according to claim 1 or 2, wherein the cover layer is a paper or film coating layer.

Installing a conductive double-sided tape connecting the first contact point and the lower electrode of the solar cell to the printed circuit board;

Installing a solar cell;

Connecting a second contact of the upper electrode of the solar cell and a printed circuit board with a conductive tape, wherein the conductive tape connecting the upper electrode and the second contact has a cover layer formed at a portion in contact with a surface resin layer; And

Forming a surface resin layer;

Solar cell module manufacturing method comprising a.

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In the solar cell module mounted on the printed circuit board,

The upper electrode of the solar cell is connected with the conductive tape to the second contact of the printed circuit board, the lower electrode of the solar cell is connected with the conductive double-sided tape to the first contact of the printed circuit board, and the upper electrode is connected to the second contact. The conductive tape connected to the solar cell module, characterized in that the cover layer is formed in a portion in contact with the surface resin layer.