It is important to understand the phenomena taking place inside a battery in order to enhance its performance. However, visualizing extremely small-scale phenomena can be problematic. Ansys’ 3D lithium-ion (Li-ion) electrochemical model can solve the phenomena inside of a battery related to potential, Li, Li-ion transport and electrochemical reaction. These results will help to understand battery performance due to electrode construction, porosity, Li concentration, material properties and so on. In this webinar, we introduce the 3D lithium-ion battery electrochemical model theory in Fluent along with its graphic user interface.