Modeling of Electrochemical Batteries Behavior and Lifetime Degradation for PV Applications

The interest in studying electrochemical batteries in many applications is rising in the last years, due to increasing applications of storage systems in which batteries have a crucial role. For example, one can cite electric vehicles and in the future power systems, where storage can be used for load leveling, power variation damping and power quality improvement. Although batteries are a component known for a long time, modelling them is a very complex task. There is not a general model easily applicable in every situation. To address this issue, this paper presents the approaches commonly used in battery modelling and develops one model to represent the behavior of battery voltage and capacity during a discharge and charge cycle. Furthermore, another model is used to predict the lifetime and the degradation. These models are developed in order to simulate small scale battery systems for Demand Side Management applications with PV generation.