Hydraix I

High efficient urban concept fuel cell vehicle prototype

Our competitor for the “Eco-marathon” 2023

The idea of this project is to build a concept car, that is reduced on main specifications and could suit urban driving mobility needs for one person. This vehicle was designed to consume as little energy as necessary. In addition to specially designed system components, a digital driving strategy has been developed to optimize driving performance on the track. For further optimization, supercapacitors were added to the system to provide temporary energy storage.

Quick facts:

  • weigth: 110 kg
  • max speed: 40 km/h
  • energy conversion trough 1 kW air cooled PEM fuel cell 
  • consumption rate: 83.3 g/100km
  • motor power: 2 x 380 W

Big step up from Charlemagne

  • weigth: 225 kg
  • max speed: 55 km/h
  • energy conversion trough 3 kW liquid cooled PEM fuel cell 
  • consumption rate: 374 g/100km
  • motor power: 2 x 1 kW

Vehicle highlights

Aeroshell and chassis

As a foundation we simulated a chassis optimized for our specific requirements and loads out of different materials. Our choice was a carbon foam sandwich material. Based on this result, we started to model a closed aerodynamic aeroshell. On this we started our inhouse manufacturing, which included milling and surface treatment of the molds, followed by our carbon layup. As a result we achieved a ligthweigth vehicle frame.

Drivetrain

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Electrical and fuelcell system

This system integrates a 1 kW air cooled fuel cell into a directly controllable hybrid system. For efficiency optimization and temporatry energy storage we use a block of supercapacitors, these components allow very quick charging rate. The key to this system is to use as much energy as possible direclty from the fuelcell, a series of electric wiriring detach the. This path of power electronics ends in two electric motors. 

 

The fuelcell system in 3D

In-house developments

Atava

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Control hardware

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Hybrid supercaps system

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Steering Wheel

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Hydraix in action