Isabellenhütte and Sensor-Technik Wiedemann to Co-operate

The current trend in hybrid drive technology is the focus on efficient electrical energy storage systems. An increasingly important energy storage system in this context is the lithium-ion battery, which boasts high energy density coupled with high power density.



“For a lithium-ion battery to work efficiently, a well functioning battery management system (BMS) with precision voltage and current sensors is needed. By joining forces with Isabellenhütte, we are now working with one of the key leaders in the field of automotive current measurement. The joint development work will open up new possibilities for us”, comments Wolfgang Wiedemann, CEO of Sensor-Technik Wiedemann GmbH who also took over as Chair of the AMA Association for Sensor Technology in mid 2009.



Sensor-Technik Wiedemann looks back on many years of experience in the development of battery management systems for automobiles. As part of its many projects, a host of utility vehicles such as compact delivery vans, small-sized lorries and buses have been fitted with hybrid drives and lithium-ion batteries.



“We are very happy about our partnership with STW, one of the key players in hybrid drive technology, and are hoping that the co-operation will help us gain further market shares in this sector,” states Dr. Felix Heusler, Sales Director for Precision Measurement and Alloys, as well as member of the management board at Isabellenhütte Heusler.



Isabellenhütte was the first company in the world to achieve the ultra-precise measurement of current, voltage and temperature in automobiles using its ISA-ASIC sensor. The BMS is based on a sensor module (“IVT”) made by Isabellenhütte that is able to measure a minimum voltage drop across a measuring shunt in the busbar of the traction network with a high degree of precision. “Our sensor modules are 100% configurable to the user’s individual needs. Thanks to co-operation with STW in the early product development phases, we were able to fully exploit this advantage,” adds Dr. Heusler.