Solar cell module and interconnecting strips thereof

Abstract

The invention discloses a solar cell module and interconnecting strips thereof. The solar cell module comprises a plurality of crystalline silicon solar cell pieces, the solar call piece is provided with a main grid line, the main grid line is provided with a conductive film, the interconnecting strips are bonded on the conductive film, the interconnecting strips are made of conductive metal, the volume resistivity of the interconnecting strip is smaller than or equal to 1.9ohm*square millimeter / m, the interconnecting strip has the yield strength of smaller than or equal to 90MPa, and the tensile strength of more than or equal to 130MPa, and the coefficient of elongation of the interconnecting strip is more than or equal to 15%. According to the solar cell module and the interconnecting strips thereof, the fragmentation of the cell piece is effectively reduced, the volume resistivity of the interconnecting strip is lowered, the serially connected resistors of the cell and the module are reduced, the filling factor FF of the module is improved, the width of the interconnecting strip is reduced, and the light receiving area of the cell is increased.

Description

technical field [0001] The invention relates to a solar battery component and its interconnection bar, belonging to the technical field of photovoltaics. Background technique [0002] With the growth of population and economy in today's world, the increasing scarcity of energy resources, the deteriorating environment and the increasing demand for electric energy, the development and utilization of solar energy has set off an upsurge worldwide. This is very conducive to the sustainable development of the ecological environment and the benefit of future generations, so countries around the world are investing in research and development of solar cells. A solar cell is a device that uses the photovoltaic effect to directly convert sunlight energy into electrical energy. There are many kinds of solar cells, one of which is crystalline silicon solar cells. [0003] As we all know, to collect the current generated by crystalline silicon solar cells, it is necessary to make a met...

AI Technical Summary

Problems solved by technology

Due to the high welding temperature (300-350°C) required in the traditional welding process, thermal stress will be generated during the welding process, which increases the probability of cracking and cracking of crystalline silicon solar cells

And the larger and thinner the crystalline silicon solar cell, the easier it is to crack due to thermal shock

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