Numerical simulation of resistance welding of solar cell using a thermal-electrical-mechanical coupled model

다국어 초록 (Multilingual Abstract)

A thermal-electrical-mechanical coupled model was established to simulate the Parallel-gap resistance welding (PGRW) process between the Germanium-based solar cell and the silver interconnector. The simulated results showed that the peak temperature during PGRW is lower than the melting temperature of the base material. It is indicated that the connection mechanism of PGRW was mainly the interdiffusion and recrystallization due to pressure of electrode and the resistance heat. A detailed calculation method of current was proposed using semi-layered resistance model and layered resistance model. By comparing these models, it was found that the layered resistance model was more accurate to calculate the current value. The maximum residual stress was generated within the region under the welding electrode, while the maximum deformation was generated on the edge of the interconnector. The current variation trend predicated by the simulation results is in good agreement with the results obtained by the experiments.

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