AN ELECTRIC-VEHICLE BATTERY SYSTEM COMPRISING A REAL TIME CLOCK

the present disclosure refers to an electric-vehicle battery system comprising:a high voltage system, HV system, with a plurality of connected rechargeable battery cells;a low voltage system, LV system, with an operating voltage lower than an operating voltage of the HV system, wherein the LV system supplies a battery system manager, BSM:a real time clock, RTC, configured for providing a system time to the BSM; anda battery disconnect unit, BDU, comprising BDU relays to switchably open or close an HV line of the HV system and a BDU control unit adapted to control the BDU relays, wherein the BDU is adapted to exchange data with the BSM via a communication interface.The RTC is integrated into the BDU and the BDU is adapted such that the RTC is at least temporarily powered by the HV system.