Abstract
Current lithium-ion battery management systems require a huge amount of connecting units for monitoring and controlling single cells. A sophisticated way of simplifying a complex wiring architecture is the use of a powerline communication system. By this approach the existing powerline is simultaneously used for data transmission. However, a thorough understanding of the channel characteristics in the high frequency range (1–110MHz) is necessary to be able to design and implement such a system. This work deals with the characterization of the powerline channel of <10Ah prismatic hard case Lithium-Ion cells and 10 cell modules with special respect to the interaction between single cells using impedance measurements. Based on the obtained knowledge, a circuit-based model of the transfer channel has been designed, allowing to estimate the behavior of larger battery systems. The model was also used to simulate different coupling methods to transmit and receive signals to the powerline.
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