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

• Main Authors: GENG XINTONG, HU XIAOGANG, CAI FAYU, ZHANG QUN, YANG QUANRONG, LENG QINGSONG
• Format: Patent
• Language: Chinese; English
• Published: 04.09.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

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