Fuel-Cell Basics

Hydrogen, the stack and high-voltage safety.

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Safety notice

Hydrogen and high-voltage systems require specific training, equipment and the manufacturer procedure. This lesson is awareness only.

What you will learn

Describe a fuel-cell powertrain
Explain hydrogen storage at a high level
Respect the safety rules

A fuel-cell electric vehicle (FCEV) generates electricity in a fuel-cell stack by combining hydrogen with oxygen, emitting water vapour. A buffer battery and the fuel cell feed the electric drive, much like a hybrid or EV.

Hydrogen is stored at very high pressure in reinforced tanks, and the stack operates in the high-voltage domain. Diagnosis and service demand specific training, equipment and procedures — this lesson is awareness, not a service guide.

Key points

A fuel cell makes electricity from hydrogen.
FCEVs use high-voltage systems and specialised hydrogen storage.
Only trained personnel service these systems.

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Key points

A fuel cell makes electricity from hydrogen
It uses a high-voltage system like an EV
Hydrogen handling requires special training

All values shown are training examples. Real thresholds depend on the manufacturer, engine, temperature and system — always confirm with the vehicle service documentation.