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Characteristics of FCEV

  • The vehicle uses electricity generated by the fuel cell stack and electricity stored in the high voltage battery to drive the vehicle. It does not require refueling with gasoline or other conventional fuels and produces no exhaust emissions, making it environmentally friendly.

  • The high performance motor allows significantly lower noise and vibration during driving compared to vehicles with internal combustion engines.

  • During decelaration or downhill driving, regenerative braking operates to charge the high voltage battery, improving driving efficiency.

Regenerative braking uses an electric motor when decelerating and braking, and it transforms kinetic energy to electrical energy in order to charge the high voltage battery.

Battery information

  • High voltage battery: Drives the motor and operates the air conditioner.

  • 12 V battery: Operates lights, wipers, and audio system. It is automatically charged when the high voltage battery is charged by the fuel cell system or regenerative braking.

Main components of FCEV

The power system of the FCEV is composed of the following:

  • Fuel cell stack: Generates the electricity

  • FCEV powertrain: The main components of FCEV include the fuel cell stack, air processing system, and fuel processing system. The air processing system delivers air, and the fuel processing system provides hydrogen fuel to the fuel cell stack, where electric energy is generated. This electric energy is then sent to the motor inverter, which drives the motor.

  • Hydrogen tank system: Hydrogen gas is stored in the hydrogen tanks, which are designed and optimized to prevent leaks and explosions.

  • Inverter: Converts the DC power from the fuel cell stack or high voltage battery to AC for operating the motor, and charges the high voltage battery by converting AC power to DC during regenerative braking.

  • Low Voltage DC-DC Converter (LDC): Converts the high voltage battery's power source to a low voltage (12 V) power source and supply power to the electrical devices in the vehicle.

  • Fuel Cell Control Unit (FCU): Controls the various controllers on the vehicle.

  • Motor: Uses the electricity generated by the fuel cell stack and the electricity stored in the battery to drive the vehicle (same role as an engine in gasoline and diesel vehicles).

  • Reducer: Delivers the rotational force of the motor to the tires at appropriate speeds and torque.

  • High voltage battery (Lithium-ion battery): Stores the electricity generated by regenerative braking and supplies power necessary for the electric vehicle to operate.

  • Do not disassemble or assemble the high voltage battery system. Doing so may lead to accidents, such as electric shock, and result in serious injury and significantly degrade the vehicle's performance and durability.

  • When the high voltage battery or its related components require inspection and maintenance, we recommend that you contact an authorized HYUNDAI dealer.

  • When the vehicle is paint baked, do not pass 30 minutes in 70 °C (158 °F) or 20 minutes in 80 °C (176 °F).

  • When you clean the fuel cell power module compartment, do not wash using water. Water may cause an electric shock to occur and damage electronic parts and components.

  • The frequent use of the V2L feature may affect the fuel cell system and the high-voltage battery lifespan.