SYSTEM AND METHOD FOR COMMUNICATION BETWEEN MODULES OF A BATTERY SYSTEM

A battery system comprising: a plurality of battery modules including a plurality of battery cells, wherein each battery module comprises a battery module monitor BMM for monitoring a state of the battery cells, a battery system monitor BSM, and an optical communication system OCS adapted to connect the BMMs with the BSM over at least two communication paths, wherein the OCS, is adapted to use at least two different wavelengths of light in order to enable a differentiation of the communication paths.