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Autonomous thermal switch

Reference number
Coordinator Uppsala universitet - Avdelningen för fasta tillståndets elektronik
Funding from Vinnova SEK 300 000
Project duration November 2015 - July 2016
Status Completed
Venture The strategic innovation programme Electronic Components and Systems:

Purpose and goal

The goal for this project is to investigate the possibility to develop an autonomic thermal switch. The long-term goal is that APR Technology should be able to manufacture and sell this component that today are not found commercially available. Prototypes that fulfill the demands of isolation in OFF mode have been manufactured. The heat conduction in ON mode is not sufficient. However, it is close enough and it is judged that it will be possible to develop and manufacture a switch that will fulfill the demands.

Expected results and effects

A number of prototypes have been manufactured and tested. The design is in general like a hockey puck with a cavity filled with paraffin. The cavity is covered with a membrane. When the switch gets warm the paraffin melts, expands and activates a thermal path through the structure. The isolation fulfills the demands but not the heat conduction. Further development of the component is therefore necessary.

Planned approach and implementation

Several prototypes have been manufactured and tested. The results from the tests have been compared to simulations and calculations. The results from the comparisons have been used for the design of the next prototype. The result of this process is that the prototypes have become better and better. However, some improvements remain before the component will fulfill the demands.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.

Last updated 25 November 2019

Reference number 2015-04545

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