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. 本公开涉及一种电动车辆电池系统，包括：具有多个连接的可再充电电池单体的高电压系统HV系统；具有低于HV系统的操作电压的操作电压的低电压系统LV系统，其中，LV系统向电池系统管理器BSM供应电力；配置用于向BSM提供系统时间的实时时钟RTC；和电池断开单元BDU，包括可切换地打开或者关闭HV系统的HV线的BDU继电器和适于控制BDU继电器的BDU控制单元，其中，BDU适于经由通信接口与BSM交换数据。RTC集成到BDU中，且适配BDU以使得RTC