Dr. Andreas Wüersig

Head of the group ""Battery Systems for Special Applications" Fraunhofer Institut for Silicon Technology (on behalf of Custom Cells Itzehoe GmBH

Biography

Dr. Andreas Würsig is head of the group "Battery Systems for Special Applications" at the Fraunhofer Institute for Silicon Technology (ISIT) in Itzehoe, Germany.  He has more than 15 years of experience in the development of advanced lithium batteries including materials, manufacturing processes and testing.  Dr. Würsig started his career with Fraunhofer in 2006 developing lithium-polymer batteries and adapting them to a broad spectrum of applications ranging from medical to automotive.  His current research focuses on new LTO anode materials for high power applications, post lithium-ion technology and water-based binder systems.  Dr. Würsig has a diploma in chemistry from the Technische Universität in Freiberg, Germany and obtained his Ph.D. from the ETH Zürich, Switzerland for his work on „Differential electrochemical mass spectrometry and X-ray diffraction for characterization of electrodes for lithium ion batteries“.  Prior to his position with Fraunhofer Dr. Würsig performed a one year postdoctoral research at the University of Basel. He holds 2 patents and has more than 20 published works.

Abstract

Maritime technologies will play a decisive economic and scientific role in the future, with the deep sea being a key element. With the generally rising cost of raw material procurement, the attractiveness of deep-sea sites is increasing. Their exploitation requires exploration and surveying (exploration), their operation requires regular monitoring (inspection). The same applies to raw material transport lines and cables for information and energy transmission. The exploration of flora and fauna as well as the geological structures of the oceans, in particular under the influence of the climatic changes of the earth, also requires the use of deep-seaworthy autonomous underwater vehicles. Exploration of the deep sea is currently carried out predominantly with a few individual, highly developed and thus expensive remote-controlled underwater vehicles, although many tasks are automatically executable routines. Deep sea suitable systems are highly specialized and, due to the highly loaded pressure vessel, very large, heavy, expensive and complicated in handling. For example, the supply of energy by charging / exchanging the integrated memories is very time-intensive and / or labor-intensive. In addition, the development of new sensor or actuator modules for the pressure element design is associated with a great deal of effort, which makes these modules vehicle-specific and not universally usable. Approaches for pressure-neutral underwater vehicles, which lead to a simplified, smaller and lighter design, have so far only been available for single components (motors, sensors). In this case, pressure neutrality means that all functional units (control computers, sensors, energy storage devices, drives) are directly exposed to the prevailing external pressure, that is to say no pressure-resistant covering. For this application highly efficient energy storage, adapted to the special conditions of use I deep sear areas are needed. Based on its existing knowhow Fraunhofer ISIT developed an energy storage system, which can withstand the enormous pressure at 6000 m below sea level and has as well a very high durability and cycle stability (20 years, >15000 cycles) . This system was integrated in an autonomous underwater vehicle, developed by various Fraunhofer institutes.

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