VENDORVIEW
It has been pointed out that edge-sealing of thin-film modules has a tremendous impact on module efficiency (long-term stability), cost per watt, and module life. It has also been explained why bulk butyl application is the most rewarding way of process implementation
monitor the butyl bead. Optionally, a vision system can be integrated to that effect. Once processing is completed the substrate is advanced downstream.
Handshakes with upstream and downstream equipment are made by means of bus system (Profibus) or Ethernet. Optionally, the system can be connected to a MES. Of course, the HMA- system features VPN-remote servicing.
Augmented process
A value-add feature is available when adding encapsulant sheeting and lay-up to bulk butyl dispense, both being incorporated in the HMA+- system. This is sequentially performed when upgrading the HMA-system accordingly.
The encapsulant is fed from a roll and automatically placed onto a cutting table where it is sheeted with perpendicular and longitudinal cuts. Even punching for contact tab feed-through holes is performed, if applicable.
A repeat-accurate pick-and-place device transfers the sheeted encapsulant onto a centred substrate and places it into the butyl frame. Usually, the spacing between encapsulant and butyl is some 1.5 mm +/- 0.5 mm.
Even marriage of glass-glass-modules can be incorporated into the production cell as a third process step, thus creating the HMA++-system. Line tact time governs whether this is performed in the same station as encapsulant lay-up or in a third back-to-back station.
Summary
It has been pointed out that edge-sealing of thin- film modules has a tremendous impact on module efficiency (long-term stability), cost per watt, and module life. It has also been explained why bulk butyl application is the most rewarding way of process implementation.
Furthermore, we have highlighted that proper
automation can boost module quality and drive down cost per watt.
GEROLD’s answer to this is the introduction of a unique way to augment the core process of bulk butyl application with sheeting & lay-up, and module assembly. This culminates in a synergetic production cell for sound integration. Labor is minimized, and limited to setup, change of consumables and regular maintenance work. Occupied footprint is kept at a minimum with this perfectly synchronized production cell. GEROLD strongly encourages adopting edge-sealing with TFPV-module production to further the benefits this can bring to the industry.
© 2011 Angel Business Communications. Permission required.
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www.solar-pv-management.com Issue IV 2011
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