Connecting structure of crystalline silicon photovoltaic cell with transparent electrodes

Abstract

The invention discloses a connecting structure of a crystalline silicon photovoltaic cell with transparent electrodes. Front electrodes of cell pieces forming a cell pack string are transparent conductive film-metal composite electrodes, and back electrodes are transparent conductive film-metal composite electrodes or back metal electrodes. The adjacent crystalline silicon photovoltaic cells are connected in series in the mode that the front electrodes and the back electrodes are overlapped, and joints are filled with a conductive binding agent so as to make a cell pack string circuit closed. The transparent conductive film-metal composite electrodes are adopted for the front and / back electrodes of the cells forming a photovoltaic assembly, so that the using amount of metal for making solar cell electrodes is greatly reduced, metal can even be not used at all, the light shielding area is reduced, and the production cost is reduced. The power generating area of the assembly is further increased through overlapped connection of the cells, and thus the power output of the assembly is increased.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a connection structure of a crystal silicon photovoltaic cell with a transparent electrode. Background technique [0002] Since the first solar cell was born in Bell Laboratories in 1954, crystalline silicon solar cells have been widely used, the conversion efficiency has been continuously improved, and the production cost has continued to decline. At present, crystalline silicon solar cells account for more than 80% of the total global solar cell market, and the conversion efficiency of the production line of components has exceeded 20%. It is expected to be flat in the next few years. As a clean energy source, crystalline silicon solar cells play an increasingly important role in changing the energy structure and alleviating environmental pressure. [0003] Crystalline silicon modules are the core terminal units of photovoltaic power generation, and their conversion effic...

AI Technical Summary

Problems solved by technology

However, the realization of this technology is based on the fact that there are metal electrodes on the surface of the battery, which will inevitably bring about two problems: First, due to the light shielding and material costs generated by the metal electrodes, it is not conducive to the further improvement of battery efficiency and cost. Second, due to the certain height of the metal electrodes at the overlap, it is easy to form a hard contact in the peripheral area of ​​the metal electrodes during the lamination process, resulting in stress concentration, which can cause cracks in serious cases, making the Reduced reliability of components

Images