Polytech S4 Intelligence Economique:Erwan12
Découvert par : Erwan Bézier
Découvert le : 24/03/2008
Paru le : 2008
Pertinence (de 1 à 4) : ****
Fiabilité (de 1 à 3) : **
La pile à combustible Honda V Flow combine l'hydrogène contenu dans le réservoir avec l'oxygène de l'air pour produire de l'électricité et ne rejette que de la vapeur d'eau. Cette nouvelle pile dispose d'une puissance accrue et d'une taille et d'un poids réduit rapport aux générations précédentes (amélioration de 50% de la puissance par rapport au volume, et une augmentation de 67% de la puissance par rapport au poids). L'énergie du freinage et de lé décélération est aussi récupérée et le surplus est stocké dans des batteries lithium-ion.
How FCX-Clarity Works
FCX Clarity is powered by an electric motor. The car you drove to work today is probably powered by an engine. The big difference is that the motor in the FCX Clarity gets its energy from electricity, instead of from gasoline like most cars today. So while the FCX Clarity has the power of an engine, it also offers the uniquely clean, quiet ride of a motor.
Honda has developed a compact lithium-ion battery that serves as a supplemental power source in the FCX Clarity.
The battery replaces the ultra-capacitor previously taking up space behind the rear seat. The battery is small enough to fit underneath the rear seat—yet another contributor to the elegant design of the FCX Clarity.
The new high-output, compact electric motor that drives the FCX Clarity is powerful and quiet for a smooth and efficient ride. This lightweight motor has its roots in the one developed by Honda for the EV Plus™ electric vehicle. High efficiency over a broad output range with low noise is the main benefit of this next-generation motor.
The new motor was designed to take full advantage of the outstanding power-generating capability in the new Honda V-Flow stack. The new FCX Clarity reduces intake noise and vibration in the air pump to achieve an even quieter, more comfortable ride than the previous model.
The lightweight, compact motor and unitized transmission in the FCX Clarity maximize the motor’s output for a smooth, efficient and quiet driving experience.
The Honda-developed Vertical Flow (V-Flow) fuel cell stack is nothing short of revolutionary. The advanced layout enables a vertical flow of hydrogen and oxygen from the air through a more efficient package; and it allows cold-weather startups in as low a temperature as minus 30 degrees Celsius.
The compact design also allows better distribution of the powertrain components for a sleek cabin-forward look, that was not possible in earlier models.
How It Works
A hydrogen fuel cell produces electricity for the vehicle. The fuel cell combines hydrogen, which is stored in a fuel tank onboard the vehicle, with oxygen from the air to make electricity. The electricity then powers the electric motor, which in turn drives the front wheels. Water vapor and heat are the only byproducts. A fuel cell is made up of a thin electrolyte film wedged between two electrode layers in between two separators. Several hundred layers of these cells are connected in a series.
1. Hydrogen fuel is fed into the anode of the fuel cell. Helped by a catalyst, hydrogen atoms are split into electrons and protons.
2. Electrons are channeled through a circuit to produce electricity.
3. Protons pass through the polymer electrolyte membrane.
4. Oxygen (from the air) enters the cathode and combines with the electrons and protons to form water.
5. Water vapor and heat are released as byproducts of this reaction.
Advances in fuel cell vehicle design accelerated rapidly once we began to develop our Honda fuel cell stack, turning conventional thinking literally on its ear.