Pan European Networks - Horizon 2020 - page 125

conventional secondary batteries have unsatisfactory drawbacks.
The lithium-polymer secondary battery system developed by the
Fraunhofer Battery Alliance can be used to achieve specific
requirement profiles. Starting with the development of foils, the
manufacturing concept enables the production of customer-
specific secondary batteries in a wide range of formats.
Manufacturing capacities installed in collaboration with an
industrial partner allow rapid implementation in large scale
production. The technology enables both variable designs and the
integration of different electrode materials and adjusted
electrolytes which can be tested and qualified in full and half-cell
series. At the partner institutes the complete processing chain for
the manufacture and characterisation of lithium-polymer
secondary batteries is available, from foil technology and cell
assembly to measurement and characterisation.
Simulation from the atomic scale up to
system design
The Fraunhofer Battery Alliance uses cutting-edge techniques
to simulate the properties of batteries from the atomic scale up
to the behaviour of the powertrain. Research topics, in both
fundamental and contract research, include the simulation of
material properties, cell optimisation from a thermal and
ageing perspective, the optimisation of battery management
systems, network simulations, and the crash behaviour of cells
and batteries.
Microstructural simulation and simulation of porous media are
one of the core competences of the Fraunhofer Battery Alliance.
In the context of the ‘Fraunhofer System Research: Electromobility’
project, and in collaboration with industrial partners,
mathematical models based on fundamental physical and
electrochemical processes are developed. These enable transport
and reaction processes in a battery cell to be described three-
dimensionally on two different macroscopic levels. The models
were implemented in the Battery and Electrochemistry Simulation
Tool software developed by Fraunhofer.With the help of a model
reduction process, simulation can be accelerated, enabling a
combination of the detailed modelling of the transport processes
to the system level. By this means, the precision of the battery
management system can be increased, for example.
Testing for battery safety and reliability
High-voltage energy storage devices are a key element in electric
and hybrid vehicles. Modern concepts include (lithium-ion)
battery systems, although the hybrid use of battery cells and
capacitors could be possible in the future. Fuel cell technology
also has significant potential, for example in combination with
battery systems to extend range. The testing and evaluation of
energy storage devices is an important stage in the development
chain for automotive applications. Due to the wide range of
technical issues involved, a large number of different attributes
must be evaluated and verified, e.g.:
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Electrical charging and discharging behaviour;
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Electrochemical service life of cells;
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Behaviour in accident scenarios (including crash, shock,
intrusion, fire); and
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Durability and system reliability during operation.
In the service centre the institutes of the Fraunhofer Battery
Alliance combine their competences in the field of electric energy
storage devices. The result is a comprehensive and holistic service
portfolio which covers almost every aspect of the testing and
evaluation of energy storage devices. Beside standard tests, the
facilities available within the Fraunhofer Battery Alliance enable
specialised and highly scientific tests on specific topics on a cell,
module and system level.
DrJensTübke
Spokesperson for theAlliance
Fraunhofer BatteryAlliance
tel :
+49 721 4640-343
H O R I Z O N 2 0 2 0 P R O J E C T S : P O R TA L
I S S U E S I X
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