Battery Model Concepts

In this training video, we describe the Battery Model Concepts in ANSYS Fluent software. We provide you with a detailed and comprehensive tutorial; so that you will master all concepts of the battery model without any problems.

In the first step, we present a general introduction to the battery. This introduction provides a basis for using the battery model in ANSYS Fluent.

• Battery Mechanism
• Battery Geometry Definition
• Single Battery and Battery Pack

In the next step, we discuss battery concepts in ANSYS Fluent software. We provide the different solution methods of the battery model and corresponding formulations; so that you could set up the battery model settings with advanced knowledge.

For example, we introduce different solution methods for coupling thermal and electrochemical behaviors. We describe these solution methods comprehensively and study the related governing equations.

• CHT Coupling Method
• FMU-CHT Coupling Method
• Circuit Network Solution Method
• MSMD Solution Method (Multi-Scale Multi-Domain)

In the solution methods, potential and energy equations are solved in ANSYS Fluent. We introduce different electrochemical models for computing the source terms in equations such as the current transfer and heat generation rate.

• NTGK Model
• Equivalent Circuit Model (ECM)
• Newman P2D Model

In different electrochemical models, we explain all relations and the corresponding coefficients. Then, we refer to the model parameters and their dependence on DoD (depth of discharge) and SoC (State of Charge).

After an introduction to electrochemical models, we focus on the computational domain of the model. So, we define battery cell, battery module, and battery pack. We mention the comparison between parallel and series connections, and the nPmS pattern arrangement.

Then, we introduce the different types of connections in battery packs.

• Real Connections
• Virtual Connections (Tab Surface Based and Active Zone Volume Based)

In addition, we mention a series of optional capabilities and tools in battery modeling.

• Thermal Abuse Model
• Battery Life Model (Cycle Life Loss and Calender Life Loss)
• Pack Builder Model

In the final step, we discuss the battery model settings in ANSYS Fluent. We review all the steps necessary for a battery simulation process.

so, we explain all settings tabs of the battery model in ANSYS Fluent.

• Model Options
• Conductive Zones
• Electric Contacts
• Model Parameters
• Advanced Options

In battery simulation, we specify the operating conditions during the battery charging/discharging. Hence, we can use different electrical parameters.

• C-rate
• Current
• Voltage
• Power
• Resistance
• Profile (Time-Schedules and Event-Scheduled)