Teamtechnik is to debut its new stringer system at SNEC PV 2012. The ‘STRINGER TT1200 HS’ is claimed to solder crystalline solar cell strings in a 2.5 second cycle on just one track. Compared to its previous model throughput, it has been boosted by 200 cycles and is claimed to currently be the fastest single-track stringer system on the market.
Problem
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The continued drive to reduce module assembly costs can be met by improving throughput and overall productivity of the stinger system. However, developments including dual track systems can increase equipment complexity and manpower resources, negating the full potential for cost reduction.
Solution
teamtechnik uses a unique design of hold-down device in its systems to separate the actual soldering process from the cell-handling process. At the same time, the hold-down devices position and secure the ribbons on the cells. This allows teamtechnik to claim 1400 cycles/hour, with a cycle time of 2.5 seconds with just one track. This hold-down device also ensures a safe process and correct string geometry. At the same time, it is claimed to guarantee extremely low breakage rates – from 0.1-0.3%, depending on the type of solar cell being used, due to the continuous optimization of the pre and post heating temperature, which reduces stress on the cells. Tool availability is said to be over 95%.
Applications
For all standard cells cell thickness > 160 µm, including 2 and 3 bus bars
Platform
teamtechnik specializes in both non-contact and controlled soldering processes. Both technologies can be integrated as an option into the systems. Laser technology offers additional flexibility. In both processes, controlled technology compensates for any fluctuations in the cell material.
Availability
April 2012 onwards.
