The problem of weld bead deflection during the welding process of photovoltaic cells cannot be ignored; this is a problem that operators must pay attention to in their work.
The welding position of the connecting strip must be straight and unbent; otherwise it is easy to cause welding strip deviation, resulting in the welding effect not being as desired.
Therefore, during normal operations, operators must straighten the weld strip before starting welding, making sure that the weld strip is flat and completely covers the weld stress line of the solar cell and does not create any exposure.
Considerations to avoid welding strip deflection (exposure):
- Deviation between the positioning of the connecting strip during welding and the weld stress line position of the solar cell;
- Excessive temperature causes the weld strip to bend, leading to bending of the solar cell after welding is complete;
- In the process, the starting point of the connecting strip deviates, which can cause the weld to be skewed and result in bends in the middle or misalignment at both ends.
Measures can be taken to effectively prevent weld bead deflection (exposure). The position of the solar cells on the base plate must be fixed to prevent deflection.
The main grid of the raw material used for solar cells causes the weld strip to deviate from the main grid after welding.
During the welding process, it should be borne in mind not to use abnormally deformed connecting strips of the welding strip.
Operational standards must be strictly adhered to, routine operations must be carried out according to specified requirements and care must be taken in the selection of connecting strips.