2021 Audi e-tron GT quattro

The 2021 Audi e-tron GT quattro is the all electric flagship built on the J1 Performance platform shared with Porsche.

Specifications:

• total energy = 93.4kWh
• usable energy = 83.7kWh
  • Usable SoC = 89.6%
• peak discharge power = 350kW_10s 
• continuous power [kW]
• nominal voltage = 724V
• nominal capacity = 129Ah
• voltage range = V to V
• weight = 630kg
  • cells = 355.2kg
• volume pack = litres
• pack dimensions =
  • module =
• number of cells =
  • 198s
  • 2p

• charge time 10 to 80% = 21 minutes
  • peak charge power = 270kW
  • 5 to 80% SoC in 22.5minutes
  • driver can restrict the charging target
  • thermal management is connected to the navigation system
• Cell
  • make and model = LG Chem E66a
  • cell format = pouch
  • nominal voltage = 3.657V
  • nominal capacity = 64.6Ah
  • cell weight = 0.897kg
• modules:
  • configuration = 6s2p
  • weight ~ 13kg
• cooling system = liquid (water-glycol)

The cooling system on the J1 platform is fixed to the underside of the pack baseplate, an undershield then fits under this. This adds another layer between the cell and the cooling system, but this does keep all of the coolant connections outside of the battery enclosure.

• pack cost =

Key Pack Metrics:

• Gravimetric energy density, pack = 148Wh/kg
  • Cell = 259Wh/kg
• Volumetric energy density, pack = Wh/litre
  • Cell = 648Wh/litre
• Gravimetric power density, pack = 556W/kg_10s
  • Cell = 1159W/kg_10s
• Volumetric power density, pack = W/litre_10s
• Estimated cost = $/kWh
• Cell to Pack mass ratio = 56%
  • module to pack mass ratio = %

The cell to pack mass ratio is quite low, ok this is a performance pack, but the cell to pack mass ratio should be greater than 60%. However, that would mean shaving 40kg from the overall pack mass.

• Cell to Pack volume ratio

Other key features:

• Safety
• BMS
• HV Distribution
• HV and LV Connections
• Cooling connections
• Structural / non-structural pack
• Case material
  • aluminium
• Sealing strategy
• Venting strategy
• Durability
• Availability
• Warranty
  • All Audi electric car batteries come with an 8 year/100,000 mile warranty, whichever comes first.
• Recycling
• Shipping

References

1. Audi e-tron GT battery, Electric has gone Audi

2019 Porsche Taycan Turbo S

This is the largest battery capacity on offer in 2019 and the highest power of 460kW for 10s.