3D thermal modeling of a battery cell on a test jig fixture using CFD

Abstract

The thermal conditioning of battery cells plays a crucial role in ensuring their safety and maximizing the driving range of electric vehicles. To gain a comprehensive understanding of battery cell performance under various conditions, testing is conducted within controlled chambers that replicate real-world scenarios. While battery packs and modules can function independently during testing, individual cells require mechanical support. This is where the jig comes into play, serving as a robust support structure that enables current conduction and facilitates effective liquidbased thermal conditioning. The objective is to achieve optimal cell climatization and maintain it at a suitable temperature. In order to comprehend the thermal properties of the jig when exposed to the heat generated by the battery cell, Computational Fluid Dynamics (CFD) simulations are employed. These simulations provide insights into the underlying physics of the phenomena and aid in the identification of potential enhancements for the jig design or testing conditions to prevent cell damage. The model can be adjusted to simulate different temperature scenarios, allowing for a comprehensive evaluation of the jig’s response under varying conditions.