One of the major problems with electric vehicles is the battery. The battery must be adequately monitored in order to optimize its performances and to maximize its life, to know when it's time to recharge it, or when the charging has been completed, or it's time to buy a new one. The battery's monitoring is the goal of the battery management system (BMS), which must be carefully designed. Moreover, the BMS must report its data to the outer world, and this means that it cannot work alone. If we want to use some kind of simulation to help the design of an effective BMS, we need a simulation model that can be easily attached to other hardware simulation models, such as CAN bus' or Bluetooth models. In this work we present and validate a BMS SystemC simulation model. Both the design and the validation of this BMS are carried on using real-world scenarios and data.