Audi at the Motor Show in Los Angeles presented A7 Sportback h-tron quattro concept. This model visually looks completely identical to the standard version, while the real difference is “under the skin”, In fact A7 h-tron is a hydrogen fuel cell vehicle with a plug-in hybrid. The complex system consists 300 fuel cells with polymer membranes with platinum catalysts on both sides.These cells operate in the voltage range between 230 and 360 V, and there is a turbocharger that blows air into the cell, while the recirculation fan returns unused hydrogen back to the anode along with the cooling pump.
Audi A7 h-tron on average consumes about 1 kg of hydrogen per 100 kilometers, according to official data, equivalent to 3.7 liters of gasoline. A Hydrogen tank of 5 kg allows this vehicle autonomy of about 500 km, a full refill takes about 3 minutes. The fuel cell system works in conjunction with a lithium-ion battery (8.8 kWh) which are installed beneath the trunk, enabling additional autonomy of about 50 km. The battery can be recharged either by regenerative braking or using a power socket (360 V – 2 hours; 230 V – 4 hours).
The vehicle also is equipped and with two electric motors. The first is located at the front, and the other is located in the back and are mutually independent. Each delivers 114 hp (85 kW) (153 (114 kW) if the voltage is temporarily raised), and maximum torque of 270 Nm. Due to the new hardware weight of this concept is 1950kg, but with a combined output of 170 kW or 228 hp and 540Nm concept to 100 km/h accelerates in 7.9 seconds before reaching a top speed of 180 km/h.