The EQC is equipped with the latest generation of a lithium-ion (Li-Ion) battery serving as the energy source for both electric motors. The battery consists of 384 cells and is located in the vehicle floor, between the two axles. The battery system is modular in design, consisting of two modules with 48 cells each and four with 72 cells each. The powerful high-voltage battery has a maximum voltage of 408 V and a nominal capacity of 210 Ah, for an energy content of 80 kWh (according to NEDC).
The integral overall cooling concept of the EQC, consisting of a heat pump function and two electric PTC heater boosters, not only includes the power electronics, the electric motor and the rotor, but also the battery. The entire battery system is liquid-cooled. At low temperatures a battery heater ensures outstanding performance and efficiency (see Climate control section).
The battery is an integral part of the crash concept for the vehicle as a whole. Its low, central location also has a positive effect on the handling characteristics of the EQC (see Safety section).
The battery is produced in Germany, by the wholly-owned Daimler subsidiary Deutsche Accumotive in Kamenz/Saxony (see Production section).
As for all other high-voltage batteries, Mercedes-Benz issues a battery certificate as a commitment to the battery performance.
Whether at home via a wallbox, while shopping, at work or ultra-fast on the motorway: there are various ways to supply electric vehicles with power. Intelligently networked charging solutions focussed on the mobility needs and convenience of customers are an integral part of the new product and technology brand EQ.
As standard the EQC is equipped with a water-cooled onboard charger (OBC) with a capacity of 7.4 kW, making it suitable for AC charging at home or at public charging stations. The charging time required for a full charge depends on the available infrastructure and the country-specific vehicle equipment. Charging at a Mercedes-Benz Wallbox is much faster than at a domestic power socket (see section “The intelligent services for the EQC).
It is faster still with DC charging – which is standard for the EQC – for example via CCS (Combined Charging Systems) in Europe and the USA, CHAdeMO in Japan or GB/T in China. This usually public quick-charging system expands the existing technical standard for AC charging of electric vehicles with the capacity for DC fast charging. Depending on the SoC (status of charge), the EQC can be charged with a maximum output of up to 110 kW at an appropriate charging station. In around 40 minutes, the battery can be charged from 10 – 80 percent SoC (provisional data).
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