Methods and systems for identification of slave elements and/or cells in a communication system within a vehicle. In some implementations, such methods may comprise measuring a first voltage of a first slave device of a plurality of slave devices within the communication system, and measuring a second voltage of a second slave device of the plurality of slave devices within the communication system. A location of at least the first and second slave devices, which may be linked with respective cells, such as battery cells or fuel cells, may then be identified by comparing at least the first voltage with the second voltage.