The Wattius wBMS-MX is a distributed Battery Management System developed to work with high-voltage batteries up to 800V. The system has been designed to meet all relevant industry requirements such as ISO26262 / IEC61508 and provides reinforced isolation according to EN50178.
This system is composed by the BMU (Battery Monitoring Unit) and CMU12s (Cell Monitoring Units, each for up to 12 cells). Each BMU supports up to 24 CMU12s for a total of 288 cells in series. Multiple BMUs can be connected in parallel without additional hardware. The system automatically handles multiple string connection and provides a single control interface with the inverter / charger.