Preparation method of trapezoidal sectional type hollowed-out low-yield solder strip and photovoltaic module thereof

Abstract

The invention discloses a preparation method of a trapezoidal sectional type hollowed-out low-yield solder strip and a photovoltaic module thereof. The method comprises the following steps: (1) according to the broken grid, positive/negative width and length and model of grid lines of a battery piece, determining the trapezoidal and hollow-out conical sizes, including the hollow-out conical degree, the bottom width, the top width and the total thickness, of a solder strip; (2) determining the optimal hollowed-out conical degree by using the hollowed-out distance of the solder strip as two holes per broken grid and the hollowed-out conical degree as 30 degrees, 45 degrees and 60 degrees respectively for orthogonal experiment evaluation test; (3) sequentially carrying out roller calendering,trapezoidal grinding tool wire drawing and taper hole treatment, by an perforating machine, on the solder strip with the size determined according to the step (1) and the step (2) to obtain a trapezoidal solder strip; and (4) annealing and tin-plating the trapezoidal solder strip obtained in the step (3). The method has the beneficial effects that the yield limit bottleneck of other solder stripsis broken through, the yield is reduced, and subfissure of the photovoltaic module is reduced.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic welding ribbon production and manufacturing, and in particular relates to a trapezoidal segmented hollow low-yield welding ribbon and a method for preparing a photovoltaic module thereof. Background technique [0002] Solar photovoltaic ribbon is one of the main auxiliary materials of photovoltaic modules, which is applied to the connection of photovoltaic module cells. The quality of photovoltaic ribbon will directly affect the current collection efficiency of photovoltaic modules, and has a great impact on the power of photovoltaic modules. The tensile yield performance of photovoltaic ribbon and the shading area of ​​the battery are one of the important factors affecting the manufacture and efficiency of photovoltaic modules. [0003] At present, 80% of the photovoltaic cells on the market are broken-grid battery grid wires and smooth flat wire ribbons. Although there are triangle ribbons...

AI Technical Summary

Problems solved by technology

[0003] At present, 80% of the photovoltaic cells on the market are broken-grid battery grid wires and smooth flat wire ribbons. Although there are triangle ribbons, sawtooth reflective ribbons, and round wire ribbons on the market, they still have their own bottleneck defects. : Triangular welding ribbon, which is not convenient for the production and manufacture of the ribbon, and it is easy to cause hidden cracks in the battery and insufficient welding tension on the back of the battery; serrated reflective welding ribbon, the welding tension on the back of the battery is low, and the battery is prone to cracks; round wire welding Although the efficiency is significantly improved and the ribbon can be mass-produced, the tensile force is lower than that of the flat wire ribbon, and the hidden cracks are abnormally increased. Therefore, it is impossible to obtain a 100% attenuation quality range guarantee in the photovoltaic industry.

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