Sept 2017 Fast, Safe , clean the Easy Lamination of Glass-Glass - - PowerPoint PPT Presentation

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Sept 2017 Fast, Safe , clean the Easy Lamination of Glass-Glass - - PowerPoint PPT Presentation

Dec 15, 2023 286 likes •572 views

Sept 2017 Fast, Safe , clean the Easy Lamination of Glass-Glass CONFIDENTIAL Page 1 Agenda Robert-Brkle GmbH Motivation Dual-Glass Modules - Process Problems Dual-Glass Process investigation and development Vacuum-Flat-Press Laminator

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Sept 2017 Page 1 Fast, Safe , clean the Easy Lamination of Glass-Glass CONFIDENTIAL

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Sept 2017 Page 2 Fast, Safe , clean the Easy Lamination of Glass-Glass CONFIDENTIAL

Agenda

Robert-Bürkle GmbH Motivation Dual-Glass Modules - Process Problems Dual-Glass Process investigation and development Vacuum-Flat-Press Laminator Conclusion

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Sept 2017 Page 3 Fast, Safe , clean the Easy Lamination of Glass-Glass CONFIDENTIAL

Agenda

Robert-Bürkle GmbH Motivation Dual-Glass Modules - Process Problems Dual-Glass Process investigation and development Vacuum-Flat-Press Laminator Conclusion

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Sept 2017 Page 4 Fast, Safe , clean the Easy Lamination of Glass-Glass CONFIDENTIAL

Robert Bürkle GmbH

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Agenda

Robert-Bürkle GmbH Motivation Dual-Glass Modules - Process Problems Dual-Glass Process investigation and development Vacuum-Flat-Press Laminator Conclusion

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Sept 2017 Page 6 Fast, Safe , clean the Easy Lamination of Glass-Glass CONFIDENTIAL

Standard Module Problems (Glass-Backsheet)

  • UV Degradation causing the Yellowing
  • Delamination due to moistening and UV

exposure

  • Moistening diffusion through the Back

sheet (Big issue in Area with high humidity)

  • high thermal extension coefficient of Back

sheet is responsible for delamination and Micro Cracks

  • PID issue or so called “Snail trails”

Critical Regions for Standard Module design

  • High Temperature and humidity regions
  • Coastal regions
  • Deserts regions
  • Heavy snow and icy region
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  • Potential of longer lifetime and thus

better ROI

  • Better mechanical stability
  • Better reliability
  • Potential of frameless modules
  • BIPV applications
  • Comparable weight with glass-back sheet modules, if

thin glass is used

  • Bifacial cell concepts for high efficiency modules

Dual-Glass Modules Benefits and Motivation

Glas washing Layup Inter connection Lamination Junction Box Inspection + Sorting Edge trimming Stringer

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Dual Glass Modules Future

ITRPV predicts, increase in market share of double glass PV

Source: ITRPV

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High Efficiency Bifacial Cell Concepts

PERT n-type Bifacial possible PERC p-type Bifacial possible HIT n-type Bifacial possible

Picture from Intersolar 06/2013 Munich

Bifacial Module – GL2GL Almost all high efficieny cell concepts have a capability for Bifacial cell design. Which can increase the power in the module up to 25% depending on the Albedo.

 According IRTPV by 2025 percentage of bifacial cells will increase to 20%

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Reliability Tests for Dual-Glass Modules

The Module reliability is affected by harsh environments with high temperature, high humidity or high UV conditions

  • 40°C to +85°C

200 & 400 Thermal cycles

35% to 43% less degradation as compared to conventional back sheet solar modules Thermal Cycling Test Damp Heat Test Humidity-Freeze Test

+85°C, 85% RH (Relative Humidity) 1000 & 2000 Hours

Zero water vapor ingress through the glass 33% to 38% less degradation as compared to conventional solar modules with back sheet No occurrence of delamination

+85°C to -40°C, 85% RH (Relative Humidity) 20 & 50 Cycles

Almost Zero water vapor absorption 30% to 58% less degradation as compared to conventional back sheet solar modules

Source: Trina Solar

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Mechanical Load Test

Source: Trina Solar

To determine the ability of the module to withstand wind, snow, or ice loads Mechanical load is applied on both side of the modules and maintained for 1 hour Mechanical load increased from 2400Pa to 6700Pa

Before After

  • Less degradation in GG Module
  • No micro-cracks found on GG

module

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Agenda

Robert-Bürkle GmbH Motivation Dual-Glass Modules - Process Problems Dual-Glass Process investigation and development Vacuum-Flat-Press Laminator Conclusion

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Challenges in Glass-Glass Lamination Process

Bubbles in the module corner or between the modules – which can lead to delamination Cell Breakage in Glass – Glass Module String movements in the Module Long Cycle times and low yield

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Agenda

Robert-Bürkle GmbH Motivation Dual-Glass Modules - Process Problems Dual-Glass Process investigation and development Vacuum-Flat-Press Laminator Conclusion

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Pin System – cause Cell Breakage

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Bürkle Pin System

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Membrane Press via Flat Press – Step 2

Membrane press Bottom Plate Top plate

Press Pad Step - 2 Final Lamination Cooling

  • ne side heating &

cooling Bottom Plate Membrane double side heating & cooling

Step - 2 Final Lamination

Flat press

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Importance of heating plate

Step 1 Step 2 cooling

Inhomogeneous heating and other pin system One side heating and cooling Double side heating and cooling Homogeneous heating and Bürkle pin system

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Membrane Press – Step 2 – distribution of Pressure

Edge Pinch – frame needed EVA flow – membrane pressure Strings movements – membrane pressure

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Flat Press – Step 2 – distribution of Pressure

No Edge Pinch - No frame needed EVA flow – flat plate pressure No Strings movements – flat plate pressure

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Agenda

Robert-Bürkle GmbH Motivation Dual-Glass Modules - Process Problems Dual-Glass Process investigation and development Vacuum-Flat-Press Laminator Conclusion

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Bürkle Inline Lamination – 3 chamber application

Bürkle Lamination Solution

  • Short process time
  • Full Automatic Inline process
  • Modular design possible
  • Low consumption
  • Small foot print
  • Perfect solution for mass production

Step 1 - Pre- Lamination Step - 2 Final Lamination Cooling

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Ypsolar Process in VFF

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Results from Bürkle Recipe

No bubbles anywhere, no EVA overflow Good transparency

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Agenda

Robert-Bürkle GmbH Motivation Dual-Glass Modules - Process Problems Dual-Glass Process investigation and development Vacuum-Flat-Press Laminator Conclusion

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Conclusion for Dual-Glass Module

Dual-Glass Module have high potential of longer Module lifetime, higher than average :

  • Product Warranty over 30 years possible – 35% higher electrical output possible
  • Slow module ageing due to climatic conditions
  • Extremely high mechanical load capacity

Dual-Glass Modules can be build without frame and with 2 mm Glass thickness, so the weight is similar to Glass-Backs sheet Modules. The Glass Modules provide highest safety in terms of transportation and installation, module cleaning, Fire and PID phenomenon Bifacial high efficiency cell concepts is getting higher attention in the market, this cell concepts highly requires Dual-Glass Modules. This new modules demanding new lamination requirements.

  • Fully Automatic Inline Solution
  • Contact Heating & Cooling from top & bottom
  • No Frame usage during lamination
  • Short Process Time – same as with Glass-Back sheet
  • High Yield
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Thanks for your attention - Bürkle Lamination Systems

Glass-Glass Thin Film Modules Glass-Glass Modules with Crystalline Cells Glass-Backsheet Modules 2022- 5/6/7 SL 2141-1C VF(F) 2022-5/6/7 VFF 2141-1C SL