40 cm shorter frame
By redesigning the battery format and shortening the pedal assembly, the frame could be tightened by 40 cm.
Season 2023
IBEX ct5
Formula Student Electric · RWD rear-wheel drive · Pouch-cell pioneer
“More compact, lower, lighter – the pouch-cell pioneer”
A completely redesigned battery format and shortened pedal assembly allowed the frame to be tightened by 40 cm. The switch to pouch cells dramatically increased energy density.
IBEX (ct5) – Formula Student Germany at the Hockenheimring
Key facts
3.0 s
0–100 km/h
190 kg
Total weight
70 kW (≈ 95 PS)
Power
100 km/h
Top speed
RWD rear
Drivetrain
Highlights & innovations
An overview of the technical milestones and key innovations of this race car.
Switch to pouch cells
First CTM battery based on pouch cells, for a leap in power density and minimal internal resistance.
Lowest center of gravity
Placing the inverter directly in front of the battery lowered the moment of inertia for significantly increased agility.
Detailed assemblies
Technical parameters and assembly details for design judges, partners and fans.
Overall vehicle
- Weight: 190 kg
- Dimensions: 3.1 m × 1.45 m × 1.2 m
- Top speed: 100 km/h
- Wheelbase: 1,530 mm
- Power: 70 kW
High-voltage accumulator
- Switch to pouch cells
- Self-developed battery system focused on power density and low internal resistance
- Voltage: 600 VDC (144s2p), capacity: 6.3 kWh
- Self-developed battery management system
- DC-DC converter replacing the low-voltage battery
Chassis
- 40 cm shorter tubular steel space frame
- Lighter firewall with higher sealing quality
- Universal carbon seat with driver-specific insert
Suspension
- Topology-optimized rockers
- Titanium anti-roll bars with dual-rate activation
- Weight-optimized gearbox and rear upright
Aerodynamics
- Downforce-optimized aerodynamics package
- Self-built front, side and rear wings made of carbon
- Closed underbody
Powertrain & electrical system
- Independent PMSM wheel-hub motors
- Stepped planetary gearbox with a 15:1 ratio for each motor
- Total torque: 630 Nm
- Water-cooled motors with additively manufactured housings and air-cooled inverter
- Improved wiring harness, repackaged inverter assembly
Season achievements & trophies
Participation – FS Germany (Hockenheimring)
Participation – FS Austria (Red Bull Ring)
Milestone: First CTM generation with pouch-cell technology