How Do Fuel Cell Electric Vehicles Work Using Hydrogen?

Battery (auxiliary): In an electric drive vehicle, the low-voltage auxiliary battery is responsible for starting the car before the traction battery takes over. It also supplies power to the vehicle's accessories.

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Battery pack: This high-voltage battery stores energy produced from regenerative braking, providing extra power to the electric traction motor when needed.

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DC/DC converter: This device is crucial for converting the high-voltage DC power from the traction battery pack to the lower-voltage DC power required for vehicle accessories and recharging the auxiliary battery.

Electric traction motor (FCEV): The motor that drives the vehicle's wheels operates using power from the fuel cell and the traction battery pack. Some vehicles feature motor generators that handle both driving and regenerative functions.

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