DMC Battery Module EIS Test Station Overview

This solution brief outlines the DMC Battery Module EIS Test Station, which is designed for the fast and accurate characterization of used lithium-ion battery cells and modules. It addresses the challenges associated with traditional testing methods, such as full charge and discharge capacity tests and DC internal resistance (DCIR) pulse testing, which are often slow and unreliable. The document details how Electrochemical Impedance Spectroscopy (EIS) can provide quicker and more dependable measurements of battery state of health (SoH) and remaining useful life. The brief describes the integration of NI’s PXI-based measurement system with a custom automated probing fixture, enabling full automation of Battery SoH testing. It also discusses the complexities of integrating various test equipment, the need for scalability in high-throughput testing, and the sensitivity required for accurate measurements. Additionally, it highlights the advantages of the partner solution, including compatibility with various battery cyclers and thermal test chambers, as well as the use of the DMC CORTEX framework for test sequencing.