Final tests are being carried out on snow slopes of Lapland, Sweden, before the market launch of the new all-electric Mercedes EQC.
Winter tests include the thermal management of the battery and the interior, charging in the cold, driving safety, traction and recuperation on ice and snow.
The 200 or so prototypes and pre-series models of the EQC have covered several million kilometres in Europe, North America, Asia and Africa. During the course of the trials the EQC has been subjected to temperatures from minus 35° up to over plus 50° Celsius. The tests are conducted for final verification before customer deliveries of the new EQC in early 2019.
Charging in the cold
At very low temperatures the high-voltage battery absorbs less power, as the chemical processes are slower than usual. During the charging process, a battery heating system known as a PTC (Positive Temperature Coefficient Thermistor) ensures that the battery remains in the best possible performance and efficiency range. To this end the coolant of the high-voltage battery is warmed as if by an immersion heater.
EQ or Electric Intelligence is Mercedes-Benz electric mobility range. The new all-electric EQC will be the first series production vehicle to emerge from the EQ range.