Electrochromic (EC) technology is the core technology of the next generation of smart windows. VDI ECIGU is a high-performance smart dimming glass based on electrochromic technology. It achieves dynamic control of light transmittance through voltage adjustment and is suitable for applications such as building curtain walls, doors and windows, ships, and high-speed trains.
Core advantages
- Adjustable daylight transmittance: Multiple levels of light transmittance can be adjusted from 60% to 1% to prevent glare and increase human comfort.
- Energy saving and environmental protection: The shading coefficient can be adjusted 10 times from 0.60 to 0.06, reducing air conditioning energy consumption, and UV protection >99%.
- Smart control: Supports control via mobile APP, 485, WIFI, Bluetooth and other methods, and can be connected to smart home systems.
- High durability: Supports more than 100,000 stable switching cycles and has a lifespan of more than 20 years.
Working principle
By applying a low voltage (DC 1-3V), ion migration occurs in the electrochromic tungsten oxide layer inside the glass, altering its optical properties and achieving transmittance adjustment. The process is reversible and maintains the state with almost no power consumption (no power consumption in the transparent state, and power consumption <0.05 W/m² in the colored state).
Product Structure
- The product structure is an insulated glass unit, with the EC film layer placed inside the hollow cavity (the 4th side).
- The exterior side is EC laminated glass, and the interior side is single-pane tempered glass or laminated glass.
- The spacer bar uses 4SG, which provides good airtightness.
- The standard configuration is 6mm TP + 0.89SGP + 3.2mm EC + 12Ar + 6mm TP, and can be customized according to customer requirements.
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size |
size |
190*350mm~1450*3300mm |
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Thickness (see Appendix 1 for details) |
16~60mm |
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Length, width, diagonal deviation, overlap |
Complies with GB/T 11944-2012 |
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Thickness deviation |
Complies with GB/T 11944-2012 |
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curvature |
Waveform and bow shape ≤ 0.15% |
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Edge processing |
Fine grinding on three sides, no bright spots allowed, glass chamfer ≥0.5mm. |
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Adhesive layer width |
The width of the outer sealant is 6~20±1mm; the width of 4SG is 6.0~6.5mm. |
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Glaze width deviation |
±1mm |
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Appearance |
Appearance quality |
Compliant with GB/T 2631-2021, GB/T 11944-2012 or as per customer requirements. |
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Color uniformity |
ΔE ab * ≤2.5 or as per customer requirements |
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Optical performance |
Visible light transmittance |
1%~60%, adjust according to the gear. |
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Outdoor visible light reflectance |
Colored state ≤8%, transparent state ≤12% |
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Indoor visible light reflectance |
Colored state ≤13%, transparent state ≤15% |
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UV blocking rate |
>99% |
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Total infrared thermal transmittance of the sun |
(Colored state) 0.07~0.46 (Transparent state) |
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thermal performance |
Shading coefficient |
(Colored state) 0.06~0.60 (Transparent state) |
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heat transfer coefficient |
≤1.63W/(m 2 ·K) |
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Working conditions |
Operating voltage |
≤3V DC |
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Power consumption |
Drive power consumption ≤0.5W/m 2 Color maintenance power consumption ≤0.05W/m 2 Transparent state has no power consumption |
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Operating temperature |
-20℃~90℃ |
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Safety and durability |
Compressive stress on tempered/semi-tempered surfaces |
Semi-tempered: 25-50MPa; Tempered: ≥90MPa |
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Number of tempered/semi-tempered fragment states |
Complies with GB 15763.2-2005 or GB/T 17841-2008 |
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Lamination glass boiling water test |
Compliant with GB 15763.3-2009 |
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Laminated glass drop ball impact peel test |
Compliant with GB 15763.3-2009 |
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Lamination glass shot bag impact test |
Compliant with GB 15763.3-2009 |
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Hollow core UV radiation resistance |
Complies with GB/T 11944-2012 |
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Dew point |
≤-40℃ |
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Water vapor sealing durability |
Complies with GB/T 11944-2012 |
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Argon content |
≥85% |
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Gas seal durability |
Complies with GB/T 11944-2012 |
