Charging cable standard for electric heavy truck

China [CN]

Key point: Medium and heavy electric vehicles have different charging requirements, and require infrastructure investment separate from light electric vehicles.

There is no consensus on the standard of megawatt charging system required for medium and heavy electric vehicles.

Achieving the goal of electrification of medium and heavy vehicles and reducing their greenhouse gas emissions requires narrowing the infrastructure gap.

Charging demand: As discussed in Part I, medium and heavy electric vehicles have high energy demand because they are heavier than light electric vehicles, pull heavier loads, and drive longer routes every day. This means that some medium and heavy electric vehicles require large battery packs of up to 1000 kWh.

High energy demand and large battery packs pose challenges for medium and heavy electric vehicles. Most of our public electric vehicle charging infrastructure can accommodate light electric vehicles. The most popular EV charger is the Class 2 charger, which can fully charge an ordinary light EV in 8-10 hours. In contrast, it takes 80-100 hours for an electric truck equipped with a 600 kWh battery to fully charge with a Level 2 charger!

DC fast charger is the fastest charger today. They range from 50 kW to 350 kW. The fastest DC fast charger can fully charge the battery of light electric vehicle by 80% in about 10 minutes. It takes six hours for a 600 kilowatt hour electric truck to charge with a 100 kilowatt DC fast charger.

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