Performance Testing

We do performance testing at Cell, Module, Pack and System level. These tests would normally include:

  • Capacity
    • Ah capacity
      • vs temperature
      • vs rate
  • Energy
    • Wh capacity
      • vs temperature
      • vs rate
  • Power
    • Peak discharge
    • Continuous discharge
    • Charge
  • Internal Resistance / Impedance
    • DC internal resistance (DCIR), from a current pulse and the resulting voltage drop
    • AC impedance (EIS), across a frequency sweep
    • vs temperature
    • vs SoC

These checks are typically run at the start and end of a test campaign so that any drift in capacity, energy, power or resistance can be measured against the fresh-cell baseline. See Accelerated Testing for how baseline and post-ageing performance checks fit into a wider test plan.

References
IEC 62660-1, Secondary lithium-ion cells for the propulsion of electric road vehicles – Part 1: Performance testing

See also: Thermal Testing, Establishing Fast Charge Current Limits