Summary:

Fuel-cell automakers also need hydrogen sensor. Factory use the basic working principle of the hydrogen fuel cell is hydrogen to fuel cell anode (cathode), through the role of catalyst (platinum), hydrogen atoms in an electron is separated out, lose electron hydrogen ions (protons) through the proton exchange membrane, to fuel cell cathode plate (anode), combined with oxygen and hydrogen ions back into water.

As the oxygen supplied to the cathode plate can be obtained from the air, so as long as the anode plate is continuously supplied with hydrogen, the cathode plate is continuously supplied with air, and the water (steam) is taken away in time, the electricity can be continuously supplied. Since hydrogen fuel cells do not store energy, they should be called hydrogen generators.

Are hydrogen tanks really safe?

At present, hydrogen storage in high-pressure hydrogen bottle is the main way of hydrogen storage in vehicle hydrogen system. The fuel cell vehicle has two hydrogen storage tanks with a pressure of up to 35-70mpa placed under and behind the rear seat cushion. There are concerns that the two high-pressure hydrogen storage tanks could rupture or even explode in a crash. Hydrogen, the lightest gas, is highly diffusible. The diffusion coefficient of hydrogen is 3.8 times larger than air and 7.5 times larger than gasoline, proving that hydrogen is safer than gasoline. So a small amount of leaking hydrogen can be quickly diluted in the air into a safe mixture. Hydrogen is small in gravity and tends to escape upwards, making it much less likely to have an impact in an accident.

Will the hydrogen leak?

From the hydrogen bottle to the fuel cell, the weak link for hydrogen leakage is the conduit, the fuel cell and the link. For this reason, hydrogen fuel cell cars are equipped with leak-proof safety systems. In general, hydrogen sensor or hydrogen leakage device is installed near the hydrogen bottle and the driver's seat. It can sense hydrogen leakage, close the hydrogen bottle solenoid valve and give an alarm within 1 second. At the same time, in order to manually cut off the hydrogen source when the hydrogen cylinder solenoid valve fails, it is usually equipped with a manual stop valve. The combination of hydrogen cylinder solenoid valve and manual stop valve can effectively avoid hydrogen leakage and improve the safety of hydrogen use.

What hydrogen sensor can fuel cell car manufacturers use to monitor hydrogen leaks? JXCT's hydrogen sensor is a good choice.

Designed to detect hydrogen, the sensor is highly sensitive, highly selective and responsive to hydrogen in the air. It can reliably measure H2 concentration over a wide range of temperature and humidity, and its response is repeatable. Even in the presence of other gases in the target gas, the hydrogen sensor recovers rapidly from the signal saturation effect of continuous exposure to hydrogen in the concentration of water, and fully recovers when hydrogen is removed.