Solar CellsThe necessary operation for the cells to realize their functions is to connect them together, and the most common connection method is welding. The quality of the welding of solar cells has a great impact on the entirePhotovoltaic modulesThe power will be greatly affected. So what is the key point of photovoltaic cell welding?
Abnormal effects of photovoltaic solar cell welding:
1. Abnormal welding repair affects the production cycle, and the short-term welding without repair causes the welding strip and the battery cell to delaminate, which affects the power attenuation or failure of the module;
2. Welding causes damage to the internal electrodes of the battery cell, which directly affects the power attenuation of the component, reduces the life of the component or causes it to be scrapped.
Critical Control Points:
1. Process parameters
2. Piece spacing and welding reserve
3. Welding appearance, battery string distortion, cold solder joints, white spots, welding strip distortion, etc.
4. Welding tension – SPC monitoring can be adopted
5. Slicing effect: heat affected area, slicing depth
6. Rework welding parameters and tension - SPC monitoring
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