With the help of new materials and additional improvements, researchers at Siemens have managed to make lithium-ion batteries safer and extend their service life.
As part of the joint research project Intrinsically Safe Battery (EiSiBatt), which is funded by the German Ministry for Economic Affairs and Energy, the engineers developed a new cell chemistry until it was sufficiently mature for general application.
As a result, it is now possible to create lithium-ion batteries that are very safe, even when they are overcharged, and that last for a much higher number of charge-discharge cycles (20,000) than the previous top value of around 5,000.
Lithium-ion batteries are very attractive energy storage systems, due to their high energy densities. In Siemens products alone, their areas of application range from small energy storage systems for hearing aids to medium-size storage systems for cranes and machine tools, and large storage systems for power grids.
The anodes of the new battery cells do not consist of graphite, as is usually the case, but of lithium titanate, while the cathodes are made of lithium iron phosphate instead of a lithium-metal oxide.
In addition, scientists at Siemens' global research unit Corporate Technology in Erlangen have developed a model that simulates the behavior of battery systems in which hundreds of the new cells are interconnected. This is the case, for example, with compact and large storage systems.
After numerous measurements and simulations, the scientists managed to understand the batteries' behavior and to describe it mathematically. The model not only encompasses the batteries' electrical behavior, but also their mechanical and thermal behavior.
The simulations enabled to scientists to find out how the new batteries' output and energy content are affected when the batteries are used to stabilize power networks or regulate frequencies, for example.
Facilis A team of engineers at Drive Technologies in Chemnitz developed the associated battery management system, which controls the cells' charge level. To ensure a smooth interaction, the engineers used components available from Siemens for the system concept.
For example, a Simotion control system analyzes the cells' voltage and temperature. This enables the software to take on additional tasks, such as when the battery is incorporated into a power grid or a drive network.
The new cells might give a variety of Siemens business areas a competitive edge. A demonstrator has already been created with which engineers can test various possible applications.
The project's participants also included specialists from the specialty chemicals company Clariant, the battery manufacturer Leclanché, and the Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW).
Dr. Norbert Aschenbrenner | Siemens InnovationNews
The new technology will significantly enhance energy harvest from PV modules
12.06.2019 | Estonian Research Council
NextGenBat: Basic research for mobile energy storage systems
12.06.2019 | Fraunhofer-Institut für Lasertechnik ILT
The well-known representation of chemical elements is just one example of how objects can be arranged and classified
The periodic table of elements that most chemistry books depict is only one special case. This tabular overview of the chemical elements, which goes back to...
Light can be used not only to measure materials’ properties, but also to change them. Especially interesting are those cases in which the function of a material can be modified, such as its ability to conduct electricity or to store information in its magnetic state. A team led by Andrea Cavalleri from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg used terahertz frequency light pulses to transform a non-ferroelectric material into a ferroelectric one.
Ferroelectricity is a state in which the constituent lattice “looks” in one specific direction, forming a macroscopic electrical polarisation. The ability to...
Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.
The Earth’s gravity fluctuates from place to place. Geodesists use this phenomenon to observe geodynamic and climatological processes. Using...
Discovery by Brazilian and US researchers could change the classification of two species, which appear more akin to jellyfish than was thought.
The tube anemone Isarachnanthus nocturnus is only 15 cm long but has the largest mitochondrial genome of any animal sequenced to date, with 80,923 base pairs....
Researchers at Chalmers University of Technology, Sweden, have discovered a completely new way of capturing, amplifying and linking light to matter at the nanolevel. Using a tiny box, built from stacked atomically thin material, they have succeeded in creating a type of feedback loop in which light and matter become one. The discovery, which was recently published in Nature Nanotechnology, opens up new possibilities in the world of nanophotonics.
Photonics is concerned with various means of using light. Fibre-optic communication is an example of photonics, as is the technology behind photodetectors and...
29.04.2019 | Event News
17.04.2019 | Event News
15.04.2019 | Event News
18.06.2019 | Life Sciences
18.06.2019 | Life Sciences
18.06.2019 | Life Sciences