Advanced hybrid storage

Scientists from three Fraunhofer Institutes are developing new storage modules for hybrid cars in a project sponsored by Volkswagen

Hybrid technology combines the advantages of combustion engines and electric motors and scientists are developing high-performance energy storage units, a prerequisite for effective hybrid motors.
Up to now, hybrid technology has always had a storage problem but scientists from three Fraunhofer Institutes are developing new storage modules in a in a project called Electromobility Fleet Test launched by Volkswagen and Germany’s Federal Ministry for the Environment BMU together with seven other partners.

The Fraunhofer Institutes for Silicon Technology ISIT in Itzehoe, Integrated Circuits IIS in Nuremberg, and Integrated Systems and Device Technology IISB in Erlangen will be pooling their expertise for the next three years. The researchers are developing an energy storage module based on lithium-polymer accumulator technology that is suitable for use in vehicles.
“This module has to be able to withstand the harsh environmental conditions it will encounter in a hybrid vehicle, and above all it must guarantee high operational reliability and a long service life,” states ISIT scientist Dr. Gerold Neumann, who coordinates the Fraunhofer activities. The researchers hope to reach this goal with new electrode materials that are kinder to the environment.

A specially developed battery management system makes the energy storage device more durable and reliable. The experts are also researching into new concepts that will enable large amounts of energy to be stored in a small space, which requires integrating mechanical and electrical components in a single module. This means devising systems for temperature control, performance data registration and high-voltage safety.
The development and configuration of the new energy storage module is expected to be finished by mid-2010. Volkswagen AG – the industrial partner in this project – will then carry out field trials to test the modules’ suitability for everyday use in hybrid vehicles.

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