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
Future AR/VR controllers could be the palm of your hand
Carnegie Mellon University’s EgoTouch creates simple interfaces for virtual and augmented reality. The new generation of augmented and virtual reality controllers may not just fit in the palm of your…
‘Game changer’ in lithium extraction
Rice researchers develop novel electrochemical reactor. A team of Rice University researchers led by Lisa Biswal and Haotian Wang has developed an innovative electrochemical reactor to extract lithium from natural…
The blue-green sustainable proteins of seaweed
… may soon be on your plate. The protein in sea lettuce, a type of seaweed, is a promising complement to both meat and other current alternative protein sources. Seaweed…