SoCUS – New cost-effective sensor system to measure state of charge
Sensors with 1 cm and 2 cm diameter to measure the state of charge of the battery. © Photo K. Selsam, Fraunhofer ISC
In the SoCUS project, the Fraunhofer R&D Center for Electromobility Bavaria is developing cost-effective sensor systems that can be integrated directly into the battery and can measure the state of charge more accurately than commercially available systems.
The systems use ultrasound pulses to measure and evaluate the density of the negative anode which changes with the state of charge of the cell.
This method combines several benefits: Since there is a linear relation between state of charge and measurement signal, the evaluation is simpler and more accurate than known technologies. A measurement unit can monitor several battery cells at the same time and detects the state of charge only during charging and discharging, a permanent control is not necessary.
This saves additional energy and costs. Since the ultrasound signal correlates directly with the mechanical properties of the cell, aging processes are better taken into account. This allows more specific conclusions about the remaining capacity and thus, the performance of the battery.
The new sensor system is suited for all kinds of battery types but has been especially tested for Lithium-ion batteries. Typical fields of application are electric vehicles, stationary storage systems, and drones.
Read more:
Journal of Power Sources, Volume 343, 1 March 2017:
Probing lithium-ion batteries' state-of-charge using ultrasonic transmission
http://www.sciencedirect.com/science/article/pii/S0378775317301003
Media Contact
More Information:
http://www.isc.fraunhofer.de/All latest news from the category: Power and Electrical Engineering
This topic covers issues related to energy generation, conversion, transportation and consumption and how the industry is addressing the challenge of energy efficiency in general.
innovations-report provides in-depth and informative reports and articles on subjects ranging from wind energy, fuel cell technology, solar energy, geothermal energy, petroleum, gas, nuclear engineering, alternative energy and energy efficiency to fusion, hydrogen and superconductor technologies.
Newest articles
Superradiant atoms could push the boundaries of how precisely time can be measured
Superradiant atoms can help us measure time more precisely than ever. In a new study, researchers from the University of Copenhagen present a new method for measuring the time interval,…
Ion thermoelectric conversion devices for near room temperature
The electrode sheet of the thermoelectric device consists of ionic hydrogel, which is sandwiched between the electrodes to form, and the Prussian blue on the electrode undergoes a redox reaction…
Zap Energy achieves 37-million-degree temperatures in a compact device
New publication reports record electron temperatures for a small-scale, sheared-flow-stabilized Z-pinch fusion device. In the nine decades since humans first produced fusion reactions, only a few fusion technologies have demonstrated…
