Power Efficient Micro-Cooler Technology

Micropelt Thin Film Thermoelectrics

TE-Power PROBE – Evaluation Kit (Sales price 730 Euro net)

Freiburg, Germany — TE-Power PROBE is an integrated thermoharvester which Micropelt have specifically designed for operating conditions using natural convection to ambient air.

A powerful heat sink ensures a high level of heat dissipation which leads to maximal thermoharvesting results when mounted in horizontal orientation. Various levels of integration can be implemented according to the requirements of the attached consumer.

Also a bolt attach is an option.

Further information: TE-Power PROBE info sheet as a pdf document (560 KB).

Using the proprietary Micropelt technology they also manufacture thin film thermogenerator components and Peltier cooler chips.

Thermogenerators are current sources which convert heat (temperature differences) into electrical energy. The thermogenerator consists of leg pairs of n- and p-type material. Each leg pair generates a certain voltage.

Again, those Micropelt thermoelectric components are very small compared to devices using standard technology. An overview of Micropelt thermogenerator products can be found at the products overview web page.

For application concepts see the energy harvesting concepts web page.

The voltage (U) generated by a thermogenerator is directly proportional to the number of leg pairs (N) and the temperature difference (delta-T) between top and bottom side times the Seebeck coefficient (S), so

U = N x delta-T x S.

With the Micropelt technology more than 100 leg pairs are possible on a square millimeter.

Micropelt Energy Harvesting

Thermoelectric (TE) energy harvesting is based on the heat flux through a thermoelectric element or a thermogenerator comprising a multitude of such elements. The heat flux is driven by a temperature difference across the element.

The generated voltage is proportional to the number of elements and the temperature difference.

Micropelt thermogenerators contain hundreds of such elements, also referred to as leg pairs ??? 10 to 100 times more than conventional TE devices.

Hence our thermogenerators produce voltages in the range of 0.5 ??? 5 Volt depending on actual temperature differences on some 12 square millimeters of footprint ??? sufficient energy to drive a wide range of low-power wireless applications including remote sensors, data loggers and small actuators.

Micropelt chip-thermogenerators support easy physical integration in all kinds of mechanical custom designs for self-sufficient heat-exposed applications.

Detailed informations are presented in the NanoPower Forum 2009 presentation ???More and Enduring Power for Wireless Systems??? by Fritz Volkert.

Download this presentation as a pdf (2248 KB) (www.micropelt.com/down/nanopower_2009.pdf) or have a look at the preview (www.micropelt.com/applications/nanopower.php).

About Micropelt

Micropelt GmbH started as a project of Infineon Technologies AG () in cooperation with the?? Fraunhofer Institute for Physical Measurement Techniques (Fraunhofer IPM) in Freiburg (Germany). Now it is a StartUp which is funded by SHS,?? MBG , KfW Mittelstandsbank, L-Bank and IBG. Their team develops thin film thermoelectric components based on semiconductor manufacturing processes.

Their Business: The manufacture and vending of thermoelectric components. We use ?? planar technologies and silicon wafers as substrates for Peltier cooler and thermogenerator devices.

Their Markets: ?? Chip spot cooling, ?? biomedical (PCR cycler), HVAC (heating, ventilation and air-conditioning), ?? Fiber Optics and ?? energy harvesting for low power applications.

Micropelt GmbH
Emmy-Noether-Str. 2
79110 Freiburg
Germany

Tel: +49 (0)761 156 337 0
Fax: +49 (0)761 156 337 21
Web: www.micropelt.com

Zweigniederlassung Micropelt GmbH
Bl??cherstr. 26
06120 Halle (Saale)

Tel: +49 (0)345 4 780 175