Hydrogen fuel cell car how far is it from us?

Source: 2020 - 04 - 10 week hits: a hydrogen fuel cell car how far some automotive engineers always say hydrogen is a clean fuel, hydrogen fuel cell vehicles will become the latest must-haves in the car lovers. For now, however, the popularity of hydrogen fuel cell vehicles are remote. Hydrogen fuel cell is zero emissions do not contain carbon, hydrogen burns does not produce greenhouse gas, carbon based at least in the engine is not, it is gasoline, diesel, kerosene, gas and other hydrocarbons does not have the advantage of, is also part of its appeal as a transport energy. Even so, if by air instead of pure oxygen combustion of hydrogen as oxidant, still the combustion will produce harmful nitrogen oxides, this has to do with fossil fuels, there is no essential difference between. In terms of the harmfulness of the gas, nitrogen oxides more dangerous than carbon dioxide. This is why, despite the people used to think that, if hydrogen engine into production, will be cheaper than other green technologies, but the improved version was abandoned by most of the technical personnel. Hydrogen cars BMW made several super sports car, only to find that they are not more than the old car is equipped with catalytic converters of environmental protection. Therefore, researchers are working to develop hydrogen fuel cells. Hydrogen fuel cells using chemical reactions to extract energy from hydrogen, rather than burn it for energy. The process of hydrogen fuel cells to produce energy and electrolysis of water completely the opposite: electrolysis of water is to split water into hydrogen and oxygen. Hydrogen fuel cells only water vapor and heat release. Fuel cell structure is simple. Hydrogen proton exchange membrane fuel cell has the positive and negative. Electrodes separated by an electrolyte, electrolyte is coated with platinum palladium catalyst polymer membranes; Hydrogen from the fuel tank is pumped to the fuel cell anode, and the fuel cell cathode is filled with the extraction of oxygen from the air. In the process of hydrogen from the positive to the negative movement, catalyst electronic extracted from hydrogen atoms, only allows the hydrogen ions ( Protons) Move to the cathode. After hydrogen ions into the negative zone, react with oxygen and form water molecules. That the proton membrane rejection of electrons are transferred to an external circuit, when they move from the positive to the negative terminal, these electronic devices connected to the circuit work ( For the heater supply power, engine, lamps, etc) 。 Due to a hydrogen proton exchange membrane cell output voltage is less than 1 v, technicians have to connect several hydrogen proton exchange membrane cells, form a useful output voltage, makes the hydrogen fuel cell looks like a slice of bread. The efficiency of the hydrogen fuel cell is three to four times of internal combustion engine. And, more importantly, the use of hydrogen fuel cell car is no heavy batteries of electric cars. The characteristics of hydrogen fuel cells, therefore, to solve the ordinary electric cars, two major problems: a limited range and long charging time. Hydrogen fuel cell vehicles, by giving can cover a distance of more than 480 kilometers, hydrogen fuel tank filled with full need 5 minutes. And, and battery cars, hydrogen fuel cell vehicles are zero-emission vehicles.