Evaluating EV battery module quality using deep characterization and emulation
Verifying EV battery modules requires testing for faulty connections, abnormal behavior, or early failures of the module's battery cells and battery management system (BMS). Testing includes characterizing the module's responses to temperature influences and their reciprocal electrical and thermal impact on the cells. To characterize the cells, wiring, and battery behavior, test engineers need to use methods like electrochemical impedance spectroscopy (EIS), resistance (DCIR), and impedance measurements (ACIR) to verify the quality, performance, and durability of modules.
Self-defined curves or curves defined by standards completing the test routines, ensuring the long-time performance or characterizing the performance against curves captured on a race track or based on the worldwide harmonized light vehicles test procedure (WLTP). Depending on the device under test, engineers can use the test bench to perform the characterization, emulate real-world conditions, or measure individual cells for voltage, temperature, pressure, strain, or communication interfaces such as Restbus and IOs. Use 4-wire (Kelvin) measurement for voltage sensing to compensate for voltage drops over longer wires.
EV battery module test solution
Evaluating the quality of a battery module requires measuring its main electrical parameters. The Keysight EV battery module test solution provides a comprehensive environment for developing and analyzing EV batteries. The solution provides both a sink and source with 20 to 300 V, 100 to 750 A, 2 to 68 kW, and up to 12 channels for battery modules.
