Besides the Audi A7 Sportback h-tron Quattro, VW Group also brought at the 2014 Los Angeles Auto Show the Golf SportWagen HyMotion, its first fuel cell vehicle based on the Modular Transverse Matrix (MQB). According to Volkswagen, the components from high-volume production vehicles were merged with the entirely new engineering.
As a result, the electric motor was adapted from the e-Golf and the motor as well as the coaxial two-stage 1-speed transmission are located at the front of the engine compartment. Also, the fuel cell stacks, cooling system and a tri-port converter that regulates the voltage between the electric motor, fuel cell, lithium-ion battery and turbo compressor are located in the engine compartment.
Power electronics are found in the center tunnel are and they convert the direct current (DC) into three-phase alternating current (AC) used to drive the motor. Meanwhile, the power electronics also integrate a DC/AC converter in order to convert energy from the high-voltage battery to 12 volts to supply the 12-volt electrical system.
Located close to the trunk is the lithium-ion 12-volt battery, while two of the total of four carbonfiber composite hydrogen tanks are located under the rear seat, while the other two are found in the luggage compartment floor. Volkswagen says that hydrogen is stored in the tanks at a pressure of 700 bar (10,150 psi).
The lithium-ion battery acts as a second powerplant in the vehicle. The front-wheel-drive Golf SportWagen HyMotion is able to accelerate from 0 to 100 km/h (62 mph) in 10 seconds and offers a range of 310 miles (500 km). Refueling takes about three minutes. Just like any other fuel cell vehicle, the Golf SportWagen HyMotion’s emissions are just a few drops of water.