Bus bar for photovoltaic component and component of same

Abstract

The invention relates to the field of a packaging material for a photovoltaic component, in particular to a bus bar for a photovoltaic component and a component of the same. The bus bar comprises a substrate, wherein the surface of the substrate is provided with an insulating area and a weldable area; and the surface of the insulating area is covered by an insulating material layer, and the weldable area is covered by a weldable layer. Good insulation between bus bars as well as between bus bars and battery strings can be realized under conditions with no additional insulating material or packaging process. Meanwhile, the design area of the component can be reduced, the component laminating process can be optimized, and the reliability of the component can be improved.

Description

technical field [0001] The invention relates to the field of packaging materials for photovoltaic components, in particular to a bus bar for photovoltaic components and components thereof. Background technique [0002] The bus bar is a part of the photovoltaic module, which is mainly used as a circuit connection unit for collecting current in the photovoltaic module packaging process, specifically the bus unit between the battery strings and the lead-out unit for outputting internal electric energy to the junction box. [0003] The general bus bar is a tin-coated copper strip, and its structure is as attached figure 1 As shown, for the convenience of soldering, the base material 1 is 99.9% copper, and the upper and lower surfaces are plated with SnPb alloy 2 (usually 60Sn40Pb) or SnCu alloy 2 (usually 96.5Sn / 3.0Ag / 0.5Cu). Due to the stacking requirements between the battery strings, there will be intersections 9 between the bus bars, and there will be contact between the bu...

AI Technical Summary

Problems solved by technology

Due to the stacking requirements between the battery strings, there will be intersections 9 between the bus bars, and there will be contact between the bus bars and other materials such as batteries, EVA or back plates, such as attached Figure 4 As shown, in order to avoid unnecessary accidents, insulation is required between bus bars or between bus bars and other materials; The insulation between them is generally achieved by mutual isolation, but this mutual isolation requires the addition of additional insulating materials and packaging processes; Slots 7 are made on the backplane to achieve mutual insulation. Such a process operation is difficult, and it is easy to cause large-area surface defects on the backplane, and the insulation effect is not good. Insulation material, which brings difficulty to the operation and lamination process of the staff

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