Segmented triangular welding strip machining device and method

Abstract

The invention discloses a segmented triangular welding strip machining device and method. The segmented triangular welding strip machining device comprises a support, a calendaring mechanism and a tin plating and blowing mechanism, the calendaring mechanism and the tin plating and blowing mechanism are installed on the support, the calendaring mechanism comprises a first pressing roller set and a second pressing roller set, a motor is fixedly installed on the support, and the first pressing roller set and the second pressing roller set are both in transmission connection with the motor. The two pressing roller sets operate stably and are driven by the same motor and driven by the synchronous belt, so that the two pressing roller sets are consistent in rotating speed, stable in length ratio of triangular sections to trapezoidal sections of products and consistent in cycle length. When the rolled rectangular section is used for welding the grid line on the back surface of the battery, the copper wire is flattened by the first upper roller and then is flattened by the second upper roller, so that the area of the flat section can be increased, the welding contact area is large, and the welding strength can be improved; meanwhile, the welding surface contact resistance is small, and the assembly power loss can be reduced. By setting an air knife. the problem of thick soldering tin on the inclined edges of the triangular area and the trapezoidal area of the triangular solder strip can be solved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic ribbons, in particular to a processing device and method for segmented triangular ribbons. Background technique [0002] Photovoltaic soldering strip is also called tin-coated copper strip, which is composed of a layer of tin-based solder with a uniform thickness on the surface of a copper strip of a certain size. Its main function is to connect cells and junction boxes in the production of photovoltaic modules. Conductivity, its performance index is closely related to the current collection efficiency of solar photovoltaic modules, the fragmentation rate of solar cells, and the long-term reliability of photovoltaic modules. It is an important material in the welding process of photovoltaic modules. Welding strips are divided into interconnection strips and confluence strips according to different uses. The soldering strip is a tin-coated soldering strip used to connect photovoltaic cells, c...

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Problems solved by technology

[0003] Since the critical angle of total reflection of sunlight on the glass-air interface layer of the photovoltaic cell module is about 41.8°, the incident angle of the reflected light on the solder ribbon incident on the glass-air interface layer of the photovoltaic module is greater than or equal to the critical angle , the sunlight will be totally reflected at the interface layer between the glass and the air of the photovoltaic module, so that the totally reflected sunlight will participate in the photoelectric conversion again. The reflection on this part of the ribbon is called effective reflection; The requirement of total reflection will pass through the glass of the photovoltaic cell module, so it cannot be used

[0004] However, in the existing segmented triangular welding ribbon processing device, the pressure roller cannot run smoothly, and the running pressure roller stops at the junction, resulting in a shortened life of the pressure roller, and the tension arm is unstable, and the equipment cannot operate normally and stably. The length ratio between the trapezoidal section and the trapezoidal section is unstable, and there are problems such as large errors in the length of each cycle; in addition, the solder layer on the hypotenuse of the triangular ribbon will reunite in the middle of the hypotenuse after melting, resulting in the soldering. The two hypotenuses changed from inclined planes to arc-like surfaces with a large protrusion in the middle, resulting in the loss of reflective reusability

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