Rolling welding device for photovoltaic cells with multiple interconnection wires and welding method of device

Abstract

The invention relates to a rolling welding device for photovoltaic cells with multiple interconnection wires and a welding method of the device. The welding device comprises a photovoltaic cell identifying and positioning device, a wiring device, an upper silicon wafer transferring device, a lower silicon wafer transferring device, a welding heating device, a front-end wire shearing device and a rear-end wire shearing device. The wiring device arranges the interconnection wires to a welding working area, and the photovoltaic cell identifying and positioning device positions and places the photovoltaic cells to be welded on the welding working area; the upper silicon wafer transferring device and the lower silicon wafer transferring device enable the interconnection wires to be pressed and attached to the photovoltaic cells; and the front-end wire shearing device and the rear-end wire shearing device are arranged on the left side and the right side of the welding working area respectively and shear off redundant interconnection wires at the suitable positions; and the welding heating device carries out welding heating on the welding working area. The rolling welding device has the beneficial effects of achieving direct wire arranging and welding of the multiple interconnection wires on the surfaces of the photovoltaic cells, removing use of a transparent film and an adhesion agent, reducing cost and improving the reliability.

Description

technical field [0001] The invention relates to the technical field of welding photovoltaic cells with multiple interconnected wires, in particular to a rolling welding device and welding method for photovoltaic cells with multiple interconnected wires. Background technique [0002] Since 2004, China's photovoltaic cell manufacturing and application have developed rapidly. By 2013, China had not only become the world's largest photovoltaic manufacturing country, but also the world's largest photovoltaic market. In the future, the photovoltaic industry will continue to grow at a high speed, attracting great attention from the market and investors. [0003] At present, most manufacturers of photovoltaic cells and modules in the industry adopt a battery electrode design and interconnection method of 2-5 bus bars. First, in the manufacturing process of photovoltaic cells, about 55-90 thin grid lines with a width of 60-100um are formed on the front side of a cell by screen prin...

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Problems solved by technology

This solution also leads to relatively high costs, since the film and the adhesive remain in the solar module, which means that there are relatively high demands on the long-term stability of the adhesive and the film

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