Ensuring reliable electrical testing and diagnostic evaluation of battery cells requires advanced electrochemical impedance spectroscopy (EIS) measurement. EIS is an established method for measuring system impedance that provides insights into the battery cell's electrochemistry and enables the characterization of its parasitic circuit elements. Based on EIS data, the cell's state-of-charge (SOC) and state-of-health (SOH) can be quantitatively predicted using modeling procedures.
EV battery cell test labs handle thousands of test channels during research and development. They characterize, select, and optimize both cell chemistry and material. Precise characterization of cells helps determine internal resistance, efficiency, capacity, cyclical life span, calendar life, reaction to temperature changes, and mechanical resistance, among other test parameters. Impedance testing of battery cells provides early warning of potential cell weakness or abnormal deterioration, which can lead to battery failure.
EV battery cell test solution
Ensuring the EV battery pack delivers peak performance starts at the cell level by characterizing and analyzing EV battery cells. The Keysight EV battery cell test solution classifies cells based on their SOH over a broad frequency range and with high sensitivity. A bidirectional power supply charges and discharges cells under test with very high efficiency. With an output power of up to 3.6 kW and a voltage range up to 6 V, the solution supports all different cell types.