MWT (Metal Wrap-Through) solar cell assembly and manufacturing method thereof

Abstract

The invention discloses an MWT (Metal Wrap-Through) solar cell assembly, comprising glass, EVAs (Ethylene-vinyl Acetate Copolymers) and a back plate material, and further comprising a series-welding cell sheet. The glass, the EVA, the series-welding cell sheet, the EVA, and the back plate material are sequentially arranged and are laminated and packed to form an MWT solar cell assembly; the series-welding cell sheet consists of a plurality of sequentially arranged MWT solar cell sheets, wherein an emitter electrode and a base electrode are arranged on the back surface of each MWT solar cell sheet, the emitter electrodes and the base electrodes of the adjacent MWT solar cell sheets are connected in series through a welding strip, the emitter electrodes and the base electrodes of the series-welding cell sheet are led out by the welding strips, and the patterns of the emitter electrodes and the base electrodes are matched with shapes of the welding strips. The invention further discloses a manufacturing method of the MWT solar cell assembly; and through the manufacturing method of the MWT solar cell assembly, the manufacturing process of assemblies of the MWT solar cell is simple and reliable, the cost is low, the compatibility is good, and the technical advantages of the MWT solar cell are fully exerted.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a MWT solar cell component and a manufacturing method thereof. Background technique [0002] The basic structure of a traditional crystalline silicon solar cell is as follows from the front to the back: emitter electrode, anti-reflection film, emitter, base area, back surface field, and base area electrode. According to the division of functions, the electrodes of solar cells can be divided into two types: one is the collecting electrode, which is used to collect the current generated by the solar cell due to the photovoltaic effect; the other is the lead-out electrode, which is used to connect the solar cell to external devices. For traditional solar cells, the lead-out electrode of the emitter is the busbar, and the lead-out electrode of the base region is the base electrode. The emitter and the lead-out electrodes of the base region are respectively arranged on the two s...

AI Technical Summary

Problems solved by technology

The whole assembly process adopts a fully automatic method, but the equipment cost of the assembly line is quite high. The most important thing is that there are some hidden dangers in this production method: 1. Generally, a layer of insulation layer is required, which is a problem under long-term working conditions. 2. This method of integrating the conductive foil that is in contact with the solar cell electrodes into the backsheet material has not been verified, and there is a problem of whether it can maintain stability during long-term work; 3. The use of conductive adhesive and This method of solar cell electrode connection is not yet widely accepted

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