Whether from environmental or economic considerations, almost all traditional car manufacturers are rushing into the electric field. However, in fact, in the field of new automotive energy, electric energy has not achieved an absolute advantage, and the status of hydrogen energy cannot be underestimated. watch for. Mercedes-Benz has also developed hydrogen-powered cars, so what about hydrogen-powered cars? Let’s take a look!
What about hydrogen fuel cars?
Hydrogen fuel vehicles refer to vehicles that run on hydrogen as the main energy source. While most internal combustion engines typically inject diesel or gasoline, hydrogen cars use gaseous hydrogen. Fuel cells and electric motors have replaced most engines. That is, the principle of hydrogen fuel cells is that hydrogen gas is input into the fuel cell. The electrons of hydrogen atoms are blocked by the proton exchange membrane and are conducted from the negative electrode to the positive electrode through the external circuit to become electric energy to drive the motor; however, protons can pass through The proton exchange membrane is discharged and oxidized to form pure water mist.
What about hydrogen fuel cars? Hydrogen Storage Techniques
There are two traditional hydrogen storage technologies. One technology is to use high-pressure gas cylinders (hydrogen cylinders) to store hydrogen, but the capacity of the cylinder to store hydrogen is small and there is a risk of explosion. Another technology is to store liquid hydrogen, but the liquid storage tank is large and kept warm with excellent insulation devices. In recent years, a new and simple hydrogen storage technology has emerged, which uses hydrogen storage alloys (metal hydrides) to store hydrogen. Research has proven that under certain temperature and pressure conditions, certain metals can absorb a large amount of hydrogen, react to form metal hydrides, and release heat at the same time. These metal hydrides are then heated and they decompose again, releasing the hydrogen gas stored within them. These metals that can absorb hydrogen are called hydrogen storage alloys. It has a strong hydrogen storage capacity. The density of hydrogen stored per unit volume is 1,000 times that of gaseous hydrogen at the same temperature and pressure, that is, high-pressure hydrogen of 1,000 atmospheres is stored.
What about hydrogen-powered cars? Fuel Cell
1. Molten carbonate fuel cell (MCFC) was successfully developed in 1980. It operates at a temperature of 650°C, uses molten carbonate as the electrolyte, and uses carbon dioxide sent to the anode as the ion carrier. No catalyst is required and other gaseous fuels such as natural gas can be used. But it takes a long time to get started. 2. The solid oxide fuel cell (SOFC) was successfully developed in 1980. The electrolyte is a solid ceramic material containing zirconia and other components. Working at high temperatures of 800 to 1000 degrees Celsius, ions can pass through ceramic materials. No catalysts such as platinum are used. Other gas fuels can also be used, which require a longer start-up time.
The above is the introduction of hydrogen fuel vehicles by the editor’s auto repair department. As for the introduction of hydrogen fuel vehicles, the auto repair editor introduced three aspects to friends, namely the introduction of hydrogen fuel vehicles, hydrogen storage techniques and types of fuel cells. So, how much do friends know after reading the editor’s introduction to car maintenance? I hope that the content of repairing the editor introduced can help my friends!