Water-blocking front plate integrated with solar cell interconnection and processing method thereof

Abstract

The invention discloses a water-blocking front plate integrated with solar cell interconnection. The water-blocking front plate comprises a base material, wherein multiple groups of series circuits for realizing interconnection of a plurality of solar sub-cells are arranged on the base material; each series circuit is configured to comprise a plurality of drainage sub-grid lines, a plurality of main grid line bus bars and series points, wherein the drainage sub-grid lines are used for collecting photo-generated currents and are in a connected state; the main grid line bus bars are used for collecting the photo-generated currents collected by the drainage sub-grid lines; and the series points are arranged at leading-out ends of the main grid line bus bars. According to the water-blocking front plate integrated with solar cell interconnection, the series circuits for sub-cell current drainage, confluence and sub-cell series connection are integrated on a multi-layer composite substrate with high transmittance and high water blocking, the defects of series lead displacement, welding spot sealing-off, cell displacement and water-blocking packaging layer dislocation which are generatedin a process of packaging and laminating can be effectively avoided, and the packaging effect and the efficiency and the yield of the cells are improved. The invention further provides a processing method of the water-blocking front plate.

Description

technical field [0001] The invention belongs to the technical field of series connection and packaging of integrated photovoltaic sub-cells. More specifically, the present invention relates to a highly light-transmitting and water-blocking encapsulation front plate with integrated sub-battery interconnection and a manufacturing and processing method thereof. Background technique [0002] In the commercial production of silicon wafer-based solar cells and flexible-based thin-film solar cells, most of the external integrated sub-cells are interconnected, and the positive and negative electrodes of the front and rear sub-cells are connected in series with welding wires and conductive tapes for drainage and confluence, so as to satisfy customers. demand for large output voltages. [0003] In the prior art, the metal grid wires connecting the positive and negative electrodes of the battery in series are mostly combined with the positive and negative electrodes of the battery by ...

AI Technical Summary

Problems solved by technology

[0004] However, this traditional series connection and packaging method involves many processes, and the series connection of wires and the circulation of upper and lower packaging films between multiple processes can easily cause displacement, desoldering of solder joints, displacement of cells, misalignment of water-blocking packaging layers and other defects. At the same time, the grid wire or wire used for welding has a small diameter and is prone to breakage during the welding process or during the transfer process, which affects the quality of its later products.

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