Battery

Full-size battery modules for automotive and stationary storage operate at currents and voltages well beyond the range of a benchtop instrument. Electrochemical impedance spectroscopy (EIS) at this scale lets developers assess the state of health (SoH) and degradation of complete modules under realistic conditions.

The FRA-X acts as an interface between the IM7 series potentiostat and an external power supply, enabling EIS measurements outside the power specifications of Zahner's products. Such a system can be used to carry out reliable EIS on battery modules. The FRA-X supports voltages up to 1400 V and currents up to 2000 A.

EIS on the full module separates the ohmic, charge-transfer, and mass-transport contributions that govern real-world behaviour. Synchronous per-cell measurement then identifies weak cells and uneven aging across a high-voltage module, which a single voltage measurement cannot provide.

The optional PAD42 cards enable synchronous measurements on individual cells within a stack allowing more detailed evaluation of battery systems.

The system can be controlled through Zahner Lab software or integrated into automated setups via C++, Python, or WebSockets.