Solar cell module

Abstract

A solar cell module of the present invention was made to improve adhesion between electrodes, which is formed with thermosetting resin containing silver paste, of a solar cell element and connecting tabs coated with lead (Pb) free spider. To achieve this purpose, the solar cell module is comprised of a front surface member, a rear surface protective member, a plurality of solar cell elements provided between the front surface member and the rear surface protective member, and connecting tabs for electrically connecting the solar cell elements to each other through electrodes with the use of lead free solder. The electrodes of the solar cell elements are made of silver paste containing thermosetting resin and silver powder. The thermosetting resin contains epoxy resin at volume ratio of 70% or more having a glass transition rate of 80 DEG C to 200 DEG C measured by a TMA method. The connecting tabs coated with lead free solder are soldered to the electrodes.

Description

technical field

[0001] The present invention relates to solar cell modules, and more particularly to techniques for increasing the yield of solar cells. Background technique

[0002] Solar cells are considered to be new energy sources that can directly convert sunlight, a clean and inexhaustible energy source, into electrical energy.

[0003] Because the output of a single solar cell is as small as a few watts, multiple solar cells are often connected in series or in parallel to increase the output to several hundred watts and used as a solar cell module to power homes and buildings.

[0004] Figure 19 is a cross-sectional view partially showing the structure of a conventional solar cell module. Such as Figure 19 As shown in , a plurality of solar cell elements 100 are connected with joints 102 made of conductive material such as copper foil. In the light-transmitting front surface member 124 such as glass and light-transmitting plastic and the rear surface protection me...

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