Archives for : Propulsion

Mercedes NECAR Hydrogen Fuel Cell Car

Mercedes-Benz (DaimlerChrysler) believe that fuel cell vehicles offer the best options for sustainable vehicle propulsion. Since the 1990s, DaimlerChrysler and its affiliated companies have developed and demonstrated hydrogen and fuel cell technology for automotive applications. Researchers and engineers have been working toward practical implementations of this technology since the early nineties. DaimlerChrysler presented its first fuel cell concept study for the NECAR series in 1994. Since then, 20 different vehicle prototypes with fuel cell drives have been developed and tested. The vehicles range from the Mercedes-Benz A-Class and the Jeep Commander to the NEBUS.

In 2001, DaimlerChrysler presented the “Natrium” (the Latin word for sodium), which demonstrated an innovative and unconventional method for storing hydrogen: on board a minivan, hydrogen was generated directly from a white salt – sodium borohydride.

In May 2002, the NECAR 5, running on methanol travelled 3000 miles across the US to prove the technology to the World at large. Practical use came in 2004 when the first F-cell, based on the Mercedes-Benz A-Class began use under normal conditions around the world. Additionally, bus and commercial vehicle fuel cell vehicles are in operation in many countries.

The A-Class lent itself well to use as a fuel cell vehicle. It is believed that the A-Class was originally intended to house electric propulsion and was hence designed with space below the passengers. This space is utilised in the NECAR for the fuel cell system components – especially energy storage in the form of hydrogen tanks and batteries.

Battery technology continues to develop and improve leading to increasing efficiencies and space savings. Future generations of fuel cell vehicles are likely to use smaller battery packs, making packaging simpler. However, hydrogen is already stored in compressed form and offers very little room for space saving in the future. Instead, improvements in the fuel cell process will be the key to reducing the need for fuel and hence the need for fuel storage.
Images courtesy & © DaimlerChrysler