With target figures of 2,000 PS of power and 1,700 Nm of torque, the Lotus Evija is the world’s most powerful production road car. Key to that exceptional power output is the 2,000 kW lithium-ion battery, supplied with its management system by Williams Advanced Engineering.
The battery pack is mid-mounted immediately behind the two seats and supplies energy directly to four powerful e-motors. This highly efficient system is the lightest, most energy dense, electric power package ever fitted to a road car. With a target weight of just 1,680 kg, it will be the lightest pure electric hypercar ever to go into series production.
Power is fed from the battery pack to a bespoke in-line axial arrangement of two high-power density e-motors. These feature integrated silicon carbide inverters and epicyclic transmission on each axle of the four-wheel drive powertrain. The motors and inverters being supplied by Integral Powertrain Ltd.
Four exceptionally compact, extremely light and highly efficient single-speed, helical gear ground planetary gearboxes transfer power to each driveshaft. Measuring a mere 100mm in depth, each gearbox comes packaged with the e-motor and inverter as a single cylindrical Electrical Drive Unit (EDU). With a target power of 500 PS per e-motor, this is the most efficient and elegant engineering solution to deploying so much power with precision.
Torque-vectoring, enabled by the four e-motors, provides exceptional dynamic response and agility on the road. This fully automatic, self-adjusting system can instantly distribute power to any combination of two, three or four wheels within a fraction of a second. In Track mode the ability to add more power to individual wheels enables the radius of corners to be tightened, potentially reducing lap times.