Battery Design
from chemistry to pack
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2019 Porsche Taycan
April 19, 2022 by Nigel
The 2019 Porsche Taycan comes with a total/gross 79.2kWh or 93.4kWh battery pack
Turbo S Performance Battery Plus
This is the largest battery capacity on offer in 2019 and the highest power.
Specifications:
total energy = 93.4kWh
usable energy = 83.7kWh
Usable SoC = 90%
peak discharge power
460kW10s
continuous power = 270kW
The 270kW continuous discharge power is based on the charge power and
hence the overall system thermal and electrical limits for extended current
demand and heating.
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nominal voltage =723 V
capacity = 129.2 Ah
voltage range = 610 V to 834 V
weight [kg] =630kg
cells = 355kg
volume pack = litres
pack dimensions [m] =
number of cells = 396
198s
2p
charge time = 5% to 80% in 22.5 minutes
270kW peak charge power
modules: 33 modules with 12 cells in each module
cooling system
water-glycol system that can heat and cool the battery
cooling system sits under the main battery structural tub ensuring any
coolant leaks cannot enter the pack
heat pump based system that allows heat from HV components to be stored
in the battery pack
cell target temperature is changed based on driving style selection
battery is preconditioned to a certain temperature level when the vehicle is
connected to the mains for charging
cell make and model
LG Chem E66a
Pouch cell format
NMC712
Key Pack Metrics:
Gravimetric energy density, pack = 148 Wh/kg
Cell = 259 Wh/kg
Volumetric energy density, pack = Wh/litre
Cell = 648 Wh/litre
Gravimetric power density, pack = 730 W/kg10s
Volumetric power density, pack = W/litre10s
Estimated cost = $/kWh
Cell to Pack mass ratio = 56%
Cell to Pack volume ratio
Other key features:
Safety
BMS
master and slave architecture
HV Distribution
HV and LV Connections
Cooling Connections
Mechanics
located in the underbody of the Taycan to ensure a low centre of gravity
battery housing is a load-bearing component of the body structure
truss-design battery frame with multiple subdivisions
28 bolts fix the battery to the body structure
battery contributes ~10% of the vehicle’s overall stiffness
cooling elements are glued on underneath the bulkhead plate using heat
conductive adhesive
steel protective lower bashplate
aluminium battery frame design
MIG welded battery frame
laser welded bulkhead and protection plates
Sealing
waterproof housing is a sandwich construction consisting of a cover at the
top and a bulkhead plate at the bottom
note: the cooling system sits under the battery pack housing thus ensuring
coolant leaks cannot short the HV system
Venting strategy
Durability
Availability
Recycling
Shipping
Warranty
60,000 km or three years if following conditions:
Vehicles standing longer than two weeks supposed to be connected to a
charger
Customers must assure that the Taycan’s state of charge remains
between 20% – 50%
Customers must make sure that their Taycan is not exposed to
continuous sunlight
Vehicles standing longer than two weeks not connected to a charger
Customers must charge the Taycan’s battery before to 50%
Customers must check every three months and assure SoC remains at
or above 20%
Customers must assure that their vehicle’s temperature is between 0°C
– 20°C
Suppliers:
Pack assembled by: Dräxlmaier
Cell made by: LG Chem
Battery case made by: Waldaschaff Automotive
References
1. Porsche Media – Sophisticated thermal management, up to 800-volt system
voltage
2. Porsche Media – The Battery
3. FEV Benchmarking of Porsche Battery – video of the pack being disassembled
4. Pontoon-e – detailed look at the engineering of the Porsche Taycan
5. TeslaRati – Porsche Whistleblower
As with all of our benchmarking we update and add to these pages as
information becomes available.