Welding head for reflective film photovoltaic module

Abstract

The invention discloses a welding head for a reflective film photovoltaic module, and relates to the technical field of photovoltaic cells. The welding head comprises an electric heating rod, a heat conduction cavity with a square outer part and a round inner part, and a guide pressing assembly, a heat-resistant sleeve is arranged between the heat conduction cavity and the guide pressing assembly;a heat conduction head with an outer arc surface is fixed at the lower half part of one side surface in the length direction of the heat conduction cavity; a semi-cylindrical protrusion is fixed to the upper side face of the lower end of the heat conduction head. The guide pressing assembly comprises a rectangular pipe body and an unpowered roller; a first rectangular through groove is formed inthe lower half part of one side of the rectangular pipe; guiding assemblies used for guiding the reflective film are linearly arranged and fixed to the same side face of the rectangular pipe body andlocated on the upper side of the first rectangular through groove. The heat conduction cavity is heated through the electric heating rod, then heat is conducted to the twelve heat conduction heads, the guide press-fit assembly is matched, the welding quality and efficiency of the reflective film are improved, and the problem that an existing reflective film is prone to deviating during welding issolved.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic cells, in particular to a welding joint for reflective film photovoltaic modules. Background technique [0002] A solar cell is a semiconductor device that converts solar energy into electrical energy. The grid wire is an important part of the battery, which is responsible for leading the photo-generated current inside the battery to the outside of the battery. A well-designed grid wire structure can reduce the series resistance of the battery, thereby reducing the power loss and increasing the output power, which is especially important for single solar cells with large-area power output. When the number of busbars increases from three to five, the corresponding increase in wattage is 260x1.3%=3.4 watts. When the number of main grids continues to increase, the resistance power loss on the auxiliary grids is further reduced, but the magnitude of the reduction gradually becomes smaller. Base...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a welding head for reflective film photovoltaic modules, which heats the heat conduction cavity through electric heating rods and then conducts the heat to twelve he

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