At the International Trade Fair for Mobility which opened yesterday, the Kassel branch of Fraunhofer IWES presented two of their products within the framework of “Fraunhofer System Research for Electromobility “. The two products are a hardware-in-the-loop battery simulation system and an inductive power transmission system for electric vehicles.
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Battery simulations save expensive test series and help to accelerate development processes. The software ISET-LIB simulates all relevant physical and electrochemical processes in Lithium Ion batteries under different operating conditions. The model inputs are constructive data as well as characteristic parameters of the cell chemistry. The software is offered for use in industrial and pre-commercial research (car manufacturers, battery manufacturers ...).
The real-time version of the software ISET-LIB is used to emulate batteries (virtual battery). A virtual battery consists of a bi-directional power supply system connected to a control unit running a real-time battery model. The voltage output of the power supply unit is controlled according to the voltage behavior of a real battery. The dynamical behavior of the battery is calculated by a real-time version of the lithium ion battery simulation software ISET-LIB respectively.
The battery models of the Fraunhofer IWES have been deployed successfully for more than 15 years in the international automotive industry. For the model validation and the development of new storage concepts, IWES has battery labs with high precision measurement technology, in which batteries can be measured in the time domain as well as in the frequency domain.
Key Benefits:
In the future, a wireless charging system will allow electric cars not only to charge their batteries, but also to feed energy back into the power grid, helping to stabilize it. The cost-effective charging system achieves high levels of efficiency across the whole power range, from 400 watts to 3.6 kilowatts, while the car and the charging coil can be up to 20 centimeters apart. Fraunhofer researchers are presenting their prototype from September 15 to 18, 2015 at the IAA International Motor Show in Frankfurt (Hall 4, Booth D33).
Fraunhofer Institute for Energy Economics and Energy System Technology