Air extraction system

The exhaust air from the fuel cell and some of the water created as a result of the reaction between oxygen and hydrogen leave the vehicle via the air extraction system.

Fuel cell stack with cast case

In the fuel cell stack, oxygen and hydrogen react to form water, generating electrical energy and heat at the same time. The stack is protected by a massive cast case that also serves as a supporting frame for various other components.

Electric turbocharger

The electric turbocharger draws in the surrounding air, compresses it and conveys it to the fuel cell stack. Increasing the pressure of the incoming air also improves the performance of the fuel cell. Some of the oxygen in the air reacts with the hydrogen in the fuel cell stack. Similarly to the familiar exhaust gas turbocharger for combustion engines, a turbine is set in motion by the flow of exhaust air, thus reclaiming energy from the fuel cell's exhaust air. This reduces the amount of electrical power required by the turbocharger (which it needs for compression), and therefore makes the system as a whole more efficient.

Charge-air cooler

This component is used to cool the incoming air, which has been heated as a result of compression in the electric turbocharger, to the current operating temperature of the fuel cells before it enters the humidifier and then the fuel cell stack. This improves the durability of the fuel cells and the humidifier by avoiding drying effects as a result of high temperatures.

Power distribution unit

This component has a direct electrical link to the fuel cell stack, and includes contactors for connecting the fuel cell with and isolating it from the vehicle's high-voltage system.

Air humidifier

This is a membrane humidifier that draws water from the moist fuel cell exhaust and adds it to the air intake. Humidifying the fuel cell air intake improves the performance and durability of the stack. Performance is improved because optimizing the level of moisture in the individual fuel cells increases conductivity, thus reducing losses.

Raw air intake and air filter

Just like every combustion engine, the fuel cell has an air intake with a filter. The purpose of this component is to transport the air that has been drawn in from the front of the vehicle to the compressor, and to filter it. Our fuel cell GLC therefore functions almost like a mobile air filter. The exhaust air leaving the vehicle is cleaner than the air it takes in.

Voltage converter

The voltage converter adjusts the variable electrical voltage of the fuel cell to the voltage level of the high voltage system in the vehicle.

Hydrogen fuel tank

The hydrogen tanks store more than 4 kg of gaseous hydrogen at a pressure of 700 bar. The tanks can be completely filled with hydrogen in around 3 minutes.

Hydrogen intake

This takes the hydrogen from the tank and adds it to the fuel cell stack. The ejector injects the hydrogen into the fuel cell.

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