Liquid-Cooled LED Arrays as Bright as 30 Headlights

Thanks to Their increase increasing light output, high-power LEDs are becoming an interesting option for medical products and industrial image processing, and UV hardening, to name just a few.
Hundreds of very densely packed power solar powered street lights 60ww/80w/100w with factory price  are needed to illuminate large-surface objects. This can lead to thermal problems.
On top of That, are high Demands Placed on unchanging optical parameters, Especially in UV applications,: such as wavelength, chromaticity, forward voltage, and light output. Fluctuating temperatures or very inhomogeneous temperature distribution across the power module are unacceptable. A joint project sponsored by VDI / VDE-IT These Bavaria faced challenges and developed compact LED modules with a high packing density and output.
The Electronic Applications Division at CeramTec GmbH supplied innovative aluminum nitride (AlN) liquid-cooled heat sinks. The Fraunhofer IZM institute in Oberpfaffenhofen designed the thermal and fluidic cooling. The Fraunhofer IZM institute in Berlin populated the ceramic heat sinks with LEDs using new bonding techniques, and Excelitas Technologies GmbH & Co KG (formerly PerkinElmer Elcos) Pfaffenhofen produced in the functional street lights for sale 56w/98w/126w with an optical compound and electrical and fluidic interfaces.
The compact CeramCool Box is made for homogeneous and efficient cooling of packing densities up to 100W/cm ². Within a 16mm x 40mm x 40mm form factor, It provides a cooling capacity of 1,600 Total Wat 90C. This translates into a delta temperature of 60K to the coolant.

The significant Increase in output of the new cooling modules was made possible by several development projects. For example, the usual thermal bottleneck seen in glued components was avoided altogether through the development of new chip assembly techniques using optimized sintering Processes for direct LED assembly on AlN ceramic heat sinks. The metalized ceramic Alunit Creates efficient thermal coupling Between the chip and the coolant.
Another area of ​​emphasis was the development of a special thermal management System with even temperature distribution over the Entire module That Also Takes into account other general conditions,: such as scalability in every direction and simple handling. The CeramCool Box From this effort resulted That Also Allows quick adaptation of the illumination to the respective application requirements without any complex optics.

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