Battery CFD Simulation Concepts

Battery CFD Simulation Concepts in ANSYS Fluent: A Comprehensive Overview

Welcome to the 2nd chapter of our Battery Training Course. 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.

Introduction to Battery

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

Fundamental Battery Concepts

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.

Battery Solution Methods

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)

Battery electrochemistry models

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).

Battery Pack definition

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)

Battery Advanced Options

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

Battery Model Settings in ANSYS Fluent

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)

Why This Episode Is Crucial for Your Battery CFD Journey

This foundational episode equips you with:

• A comprehensive understanding of battery principles


• Insight into ANSYS Fluent’s capabilities for battery simulation


• Practical knowledge of setting up various electrochemistry models

By mastering these concepts, you’ll be well-prepared to tackle more advanced battery simulations in subsequent chapters of the course.

Target Audience

This episode is ideal for:

• Beginners in battery CFD simulation


• Experienced CFD users new to battery modeling


• Researchers and engineers looking to refresh their battery simulation fundamentals

Learning Outcomes

After completing this episode, you will:

• Understand the core principles of battery cell and battery pack


• Be familiar with ANSYS Fluent’s battery modeling capabilities


• Know how to set up different solution methods and electrochemistry models in ANSYS Fluent


• Be prepared for more advanced battery simulations in future episodes

Embark on your electrolysis CFD simulation journey with this comprehensive introduction, setting a strong foundation for the exciting chapters ahead!