Electric mobility and integration of renewable energy sources into supply grids require effi-cient energy storage systems. Modular battery management systems supervise the cells of lithium-ion batteries and determine their states of charge and service life. They balance energy among the cells, such that a long service life is reached and use is optimized.
Power modules connect the battery with energy sources and consumers. Adaptation of voltages and currents requires fast switching power modules. As a result, power density of the system can be increased and size can be reduced. Copper thick-film modules with integrated capacitors and control circuits are compact and reach a high efficiency.