1.Type III, type IV carbon fiber cylinders, aluminium alloy or high-density polymer inner liner, peripheral carbon fiber winding, the main pressure-bearing structure of the carbon fibre itself.GB/T 35544-2017, carbon fiber cylinders for automotive use to do a detailed technical requirements and test specifications.

2. Gas cylinders should be shot, fire, fall can not explode.

3. When the cylinder is ruptured by gunshot, the high-purity hydrogen gas is released quickly, and it will not burn or explode.

4. 110 ° C or so over-temperature rapid release, not spread and not explode.

5.100 metres drop test, vehicle crushing, hydrogen bottle does not explode, not rupture. Internal pressure per square centimetre of about 350 kg, in dozens of square centimetres of contact surface, the external impact/pressure compared to the internal pressure is negligible.

6. When the valve stem breaks, high purity hydrogen leaks, and the cylinder does not fly away or burn. The aperture of the break point is only about 2 square millimetres, and the thrust is about 0.7 kg, which is not enough to launch a 4 kg cylinder into the sky, and the high-purity hydrogen leaks out instantly.

7. The hydrogen cylinder used on the hydrogen-powered drone is a type III carbon fibre cylinder produced by a central enterprise, Sinoma Technology, in line with the national pressure vessel standard GB/T15385-2011. The company has been granted a manufacturing licence for special equipment (pressure vessels) by the General Administration of Quality Supervision, Inspection and Quarantine. The three-type carbon fibre cylinders for hydrogen storage have an aluminium alloy inner liner and high-strength carbon fibre wrapped around the outer liner, and their safety has been verified 

The more mature low-temperature PEM hydrogen fuel cell is a clean electrochemical power generator. There is no internal combustion, and the core temperature is typically between 40-65 degrees. Very few mechanical moving parts, low maintenance costs, high reliability.

Hydrogen is transported through an anode plate runner to the interior of the reactor, where it uniformly permeates through a diffusion layer to the catalytic layer and the proton exchange membrane. In the presence of a platinum catalyst, the protons are carried to the other side of the proton exchange membrane where they combine with oxygen atoms at the cathode to form water. The electrons return to the cathode through the loop through the load to form an electric current.

The area of the plates determines the amount of current. The number of stacked layers of the plate determines the voltage size The open circuit voltage of a single cell is about 1V, and the working voltage is about 0.65V. In practice, the conversion efficiency has reached 55%, 45% in the form of heat release.

Hydrogen energy refers to the chemical energy released by the chemical reaction between hydrogen and oxygen, and is a clean secondary energy source with the advantages of wide source, high calorific value of combustion, high energy density, storable, renewable, electric, combustible, zero pollution, zero carbon emissions, etc. It is known as the "ultimate energy source" and "clean energy source" for controlling the earth's temperature rise and solving the energy crisis in the 21st century.

1. Hydrogen explosive mixture ratio of about 4-75% between, as a comparison, gasoline about 1.4%, natural gas 4.7% or more than the mixing ratio can be exploded.

2. hydrogen density is only air 1/14, upward diffusion rapidly, about 20m / s, not easy to accumulate, difficult to form explosive mixture conditions. 3. in the combustible gases, although than the mass of the highest calorific value, under the same conditions, than the volume of the lowest calorific value of natural gas is only 1/3 of the combustion of hydrogen explosion is a shrinkage reaction, 2 hydrogen molecules and 1 oxygen atom to form 2 water molecules, so the explosive energy is far lower than natural gas and petrol.

4. hydrogen ignition energy is low, but also need to 574C open flame to ignite.

5. Separate power generation and energy storage, not like the thermal runaway battery, control logic cut off the solenoid valve response will stop.

6. Easily detected, ppm level combustible gas alarms can be detected, very popular.