Voltage and temperature dynamic simulations for advanced Battery Management Systems

Successful introduction of Plug-in Electrical Vehicles (PEV) increases the requirements for advanced on-board Battery Management Systems (BMS) significantly. Modern BMS provides the driver for a number of important indications, such as remaining operation time, adaptive State-of-Charge and State-of-Health. The core of an advanced BMS is a mathematical model for the battery (pack). However, the high complexity and the large amount of computing power necessary for a proper implementation of such models creates a barrier for their introduction to automotive applications. In the present paper a simple dynamic model, describing the behavior of the battery voltage is therefore proposed. The approach is experimentally validated for 18650-type of Li-ion cells.