5. Discharging

5.2. Example

Cell Sanyo NCR20700A

  • R0 in summer approx. 0.02 Ω
  • R0 in winter approx. 0.04 Ω


Battery 32 kWh, 390 V

  • 105 cells in series, 25 parallel branches, a total of 2625 cells
  • R0 battery: 0.084 Ω (summer), 0.168 Ω (winter)

Battery electric vehicle, Pmax = 120 kW

Full power current: I=P_{max}/U_n
=120000/390=307 A
  • Power losses on R0 at full power:
    • R_0
I^2 = 0.084∙307^2 ≈ 8 kW (summer)
    • R_0 I^2 = 0.168∙307^2 ≈16 kW (winter)