Contact UsIntroduction
Fast-charging simulations require more than applying a current profile to a battery model. To capture realistic charging behavior, engineers need to account for how resistance, open-circuit voltage, heat generation, and state of charge change throughout the charging cycle.
In Ansys Fluent, this can be done using the Battery Model with the NTGK/DCIR electrochemistry approach. This workflow relies on test-derived tabular data, including fast-charging behavior, resistance values, and U-value inputs, to help simulate how a battery pack responds under high-current charging conditions.
This Tips & Tricks video walks through the Fluent setup process for fast-charging analysis, from enabling the battery model to reviewing temperature, current, and SOC results.
What You’ll Learn
- How to enable and configure the Battery Model in Ansys Fluent
- When to use the NTGK/DCIR model for fast-charging simulation
- How to define circuit network behavior for a pack-level battery model
- Where to input fast-charging, resistance, and U-value table data
- How to set voltage limits and SOC stop criteria
- How to run a transient fast-charging simulation
- How to review terminal current, SOC, and battery temperature results
Why It Matters
Fast charging can introduce significant electrical and thermal stress across a battery pack. Simulation helps engineers evaluate charging performance earlier in development, identify potential thermal concerns, and better understand how pack behavior changes under aggressive charging conditions.
By properly configuring the DCIR submodel in Fluent, teams can improve the accuracy of fast-charging studies and gain more confidence in battery thermal and electrochemical performance before physical testing.
Need help modeling battery fast charging, thermal behavior, or electrochemical performance in Ansys Fluent? SimuTech Group’s simulation experts can help you set up, validate, and refine battery models for your application.
Mohsen Seraj, P.Eng.
Sr. Staff Engineer – Fluids, SimuTech Group
Mohsen Seraj, P.Eng., is an FEA/CFD Analyst and Mechanical Engineer at SimuTech Group. He specializes in numerical analysis for structural and thermofluid applications, with experience spanning mechanical design, CFD, FEA, and simulation-driven engineering support. Mohsen helps engineering teams apply simulation tools to evaluate performance, troubleshoot complex behavior, and improve confidence in design decisions.
