1. Electrical properties and modeling

1.3. Parameter identification

  • Determination of parameters using discharge characteristics during pulse discharge.
  • Dependences of parameters on state of charge and temperature: R, C = f (SOC, T).

Discharge characteristics of the cell during pulse discharge with a current of 23 A at a temperature of 25° C



Identification of internal resistance R0

  • Internal resistance is a key parameter of the battery.
  • It causes a voltage drop.
  • It affects the efficiency of charging and discharging, i.e. losses and range.
  • Heavily dependent on temperature - huge differences between summer and winter operation of electric cars!

Current pulse load of the cell







Identification of internal resistance R0 depending on temperature and SoC