When developing new battery technologies, fundamental research means assembling new batteries by hand since a production line is not worthwhile for building and testing individual cells. This causes high production tolerances to occur because manual manufacturing is not as precise as machine-made. When putting these prototypes into operation, problems can arise due to the varying parameters. One of the most important exercise is finding a criterion of a full battery. This can be challenging when parameters like the capacity or the end of charge voltage are not precisely known due to the tolerances. Furthermore, new battery types do not necessarily rely on the same stopping criteria. For example zinc-air secondary batteries do not offer an end of charging voltage. Its charging current is not going to decrease when the battery is full and the charging voltage is held at a fixed value. But instead of de-oxidising zinc oxide, hydrogen is produced. In the majority of cases overcharging should be avoided as it harms the battery. Another even more dangerous consequence is the possibility of an explosion. Especially lithium based batteries are known for their need of compatible ambient and charging parameters. This paper proposes a new criterion for detecting the end of charge that is based on the rate of change of electrochemical impedance spectra of the examined batteries. Device parameter fluctuations influence every measurement. Therefore, using the rate of change offers the possibility to not depend on these fluctuations.
This work describes the setup of an ultrawideband (UWB)
realtime localization system (RTLS) for tracking of particles.We describe
how the RTLS obtains distances and positions through radio waves and
the setup and evaluation of a real world system is stated in detail. In
the proposed system the particles track a subtrates surface
ow inside a
biogas plant for verication of agitation processes.
Die Beiträge, der Konferenz:
• Nanotechnologie –Von Wunder-Materialien und solchen die es werden wollen
• Mikrotechnik –to improve the qualityof live
• Quantum Sensing for Industrial Applications
• Geordnete Defekte in Graphit: Ein Fahrplan in Richtung Raumtemperatur Supraleitung
• Funktionale mikro-und nanostrukturierte Folien als Bestandteil hochintegrierter Systeme