Emilia 4 (2018)
- Karl Ding
- Taiping Li
| Class | cruiser |
|---|---|
| Length x Width x Height | 4.61 m x 1.80 m x 1.23 m |
| Weight | 315 kg including batteries 650 kg including 4 passengers |
| Occupants | 4 |
| Array | 326x Sunpower E60 in 7 Modules |
| Battery | Samsung INR18650-35E |
| Motor | 2 custom, 1.3 kW Nominal, 3 kW Peak |
| Wheels | 4 custom lenticular 16” |
| Chassis | carbon fiber monocoque |
| Budget | €2,000,000 |
Here's a side view
They also had to add a crush appendage to each of their 4 doors in order to meet ASC's crush zone regulation.
Aerodynamics
| Frontal Area | 1.60 m2 |
|---|---|
| Drag Coefficient | 0.20 |
Dynamics
| Front track | 1.320 m |
|---|---|
| Rear track | 1.200 m |
| Wheelbase | 2.772 m |
Performance
| Top Speed | > 110 km/h |
|---|---|
| Average Power Consumption | 21 Wh/km @ 55 km/h |
| Range | 750 km @ 55 km/h |
Array
| Cells | SunPower E60 |
|---|---|
| Efficiency | 24% |
| Modules | 7 |
| Cells | 326 |
| Area | 5 m2 |
| Power | 1100 W |
They use a custom boost MPPT that they designed.
| Nominal single stage power | 200 W |
|---|---|
| Maximum efficiency | 98% |
| Unit weight | 100 g |
| Number of MPPTs | 7 |
Battery Pack
| Cell Chemistry | LiNiCoAlO2 |
|---|---|
| Manufacturer | Samsung INR18650-35E |
| Nominal cell capacity | 3.4 Ah |
| Pack Configuration | two packs of 48P 14S |
| Number of Cells | 1344 |
| Nominal Pack voltage | 48 V |
| Nominal Pack Capacity | 331.2 Ah |
| Pack Energy | 16.1 kWh |
| Temperature sensors | 2688 |
| Cell Balancing | active |
| Cooling | air |
They have an insane amount of temperature sensors for their battery pack (2 for each cell) which is absolutely obscene.
They also build their own battery box, which is positioned in their catamaran, which apparently allows them to adjust the weight distribution by up to 5%.
| Dimensions | 1.160 m x 0.46 m x 0.22 m |
|---|---|
| Material | carbon fiber and kevlar composite |
| Weight | 83 kg |
Motors
One interesting thing is that they design their own motors and motor controllers, which allows them to have no high voltage in their car.
They built a brushless DC motor out of composite materials, which are direct drive to the wheel and mechanical brake. They use two motors mounted to the rear wheels.
| Nominal power | 1300 W |
|---|---|
| Maximum power | 3000 W |
| Nominal torque | 35 Nm |
| Maximum torque | 125 Nm |
| Efficiency | 97% |
| Weight | 11 kg |
| Cooling | air |
Motor Controllers
They also build their own motor controllers.
| Type | three-phase, field oriented control |
|---|---|
| Maximum input voltage | 60 V |
| Maximum RMS current | 200 A |
| Efficiency | 98% |
| Weight | 1.0 kg |
| Cooling | air |
Telemetry
They use a Wi-Fi network. They run 5 separate CAN buses, each at 1 Mb/s.
Driver Display
They have a 12" LCD display.
Interior
Again, everything is carbon fiber.
