Solar container spot welding and desoldering

Why do weld spots change during thermal cycling?

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Why do solar cell weld spots remain unaltered?

There is no evidence of melting or degradation at the Au Ag interface throughout the welding process, as depicted in Fig. 7 d–i. Thus, the employed PGRW current density ensures that the multilayer metal thin films in the solar cell weld spots remain unaltered, preventing any reduction in photoelectric performance of the solar cells. Fig. 7.

What is a solarcontainer?

The Solarcontainer is a photovoltaic power plant that was specially developed as a mobile power generator with collapsible PV modules as a mobile solar system, a grid-independent solution represents. Solar panels lay flat on the ground. This position ensures maximum energy harvest Panels lays flat on the ground.

Why do weld spots change during thermal cycling?

Considering that the stresses generated during thermal cycling are predominantly influenced by the properties of the substrate and the interconnect material, these varying stresses lead to the transformation of the connecting interfaces of weld spots of the two interconnect foils.

How to remove pgrw joints from interconnected solar cells?

A 300 W laser was employed to extract the PGRW joints between the GaAs solar cell and the interconnect foil from the interconnected solar cell structure. As shown in Fig. 3 a, the PGRW joints within the white rectangular region were removed by laser.

What is ultrasonic spot welding?

As a solid joining technique, ultrasonic spot welding is a promising spot welding process to fabricate the aluminum alloy joints.

Why do solar cells use interconnecting foils?

During the manufacturing of solar cell arrays, interconnecting foils serve as links among solar cells. Thus, the integrity of connection between the solar cells and interconnecting foils directly influences the service reliability of spacecraft.