{
  "current_A": 40,
  "soc": 0.3,
  "R0_ohm": 0.02,
  "k_cell_W_mK": 20,
  "k_coolant_W_mK": 0.6,
  "h_conv_W_m2K": 80,
  "T_amb_degC": 25,
  "domain_L_m": 0.08,
  "rows": 3,
  "cols": 4,
  "radius_frac": 0.4
}