2021 Mercedes EQA 250

The 2021 Mercedes EQA 250 is an all electric compact SUV.

Specifications:

Traditional layout with a single motor driving the front wheels and a battery pack under the passenger compartment.

• total energy = 69.7kWh
• usable energy = 66.5kWh
  • Usable SoC = 95.4%
• peak discharge power = 156kW_10s 

Peak discharge power is estimated based on peak motor power of 140kW and a motor and inverter efficiency of 90%, hence 140kW / 90% = 156kW

• continuous power kW
• nominal voltage = 367V
• capacity = 190Ah
• voltage range = V to 420V
• weight =kg
  • cells = kg
• volume pack = litres
• pack dimensions =
  • module =
• number of cells = 200
  • 100s
  • 2p
• cell
  • make and model = CATL
  • Format = prismatic
  • Nominal voltage = 3.67V
  • Nominal capacity = 95Ah

• charge time = 10 to 80% in 30 minutes
  • 100kW charge power
• modules:
  • 5 modules
• cooling system = liquid (water-glycol)
  • Heat Pump
  • If Navigation with Electric Intelligence is activated, the battery may also be pre-heated or cooled while driving in order to ensure that it is within the ideal temperature window for a rapid charging station.
  • Use of waste heat from the high-voltage battery: if the temperature of the battery rises above a defined threshold value, the waste heat can be used to heat the interior.
• pack cost =

Key Pack Metrics:

• Gravimetric energy density, pack = Wh/kg
  • Cell = Wh/kg
• Volumetric energy density, pack = Wh/litre
• Gravimetric power density, pack = W/kg_10s
• Volumetric power density, pack = W/litre_10s
• Estimated cost = $/kWh
• Cell to Pack mass ratio
  • module to pack mass ratio = %
• Cell to Pack volume ratio

Other key features:

• Safety
• BMS
• HV Distribution
• HV and LV Connections
  • Connections at the front of the pack in traditional bulkhead tunnel area
• Cooling Connections
• Structure = non-structural pack
  • The battery housing is part of the vehicle structure and thus an integral part of the crash concept.

• Case material
  • Base and rails aluminium
• Sealing strategy
• Venting strategy
• Durability
  • A battery guard in the front area of the battery is able to protect the energy storage unit from being pierced by foreign objects, and thus also prevent consequential damages.
• Warranty
  • 160,000km or 8 years
  • certificate also covers capacity loss
• Availability
• Recycling
• Shipping

References

1. Mercedes EQA Technical Data – the manufacturers own technical data, very limited.
2. Mercedes Group Media – the EQA 250
3. EV Database EQA250
4. Technology of the new EQA – Mercedes