Abstract:
The crystalline silicon Photovoltaic (PV) module industrial assembly line using soldering iron station in tabbing and string processes is basic method for connecting each solar cell. Its capital cost of production line is considerably lower than an automation process. Many assembly factories have popularly used this method to produce PV modules. However, the main problem is the bonding of each cell between the ribbon and cell busbar that is non-uniform and it is also discontinuous form. Accordingly, it can cause to reduce maximum power and the cracking cell problem. Because of these, the capital cost of production line can be surely increased.
This thesis purposes the study on soldering solar cell to improve maximum power in crystalline silicon PV module assembly industry using the parameter controlling techniques in terms of temperature, soldering time for connecting each cell per busbar and suitable ribbon sizing. These techniques are actually used in the production line to improve maximum power of PV module and checking the quality of bonding including cracking of each solar cell compared to the old process.
The results of study shown that the suitable parameters for production line in terms of the temperature, the soldering time and the ribbon sizing of PV module are 390 .C, 5 seconds per busbar and 0.20.2.00 mm respectively. The maximum power can be increased to 2.33 percent and the bonding between the ribbon and cell busbar is uniform. The cracking cells cannot be found. As a result, capital cost of production can be reduced to 4.93 percent compared to the old process.