CAE EV Technology & Future Trends 1

Question 1

What is the primary difference between a BEV and a PHEV?

Accepted Answer

BEVs run entirely on battery power; PHEVs have both a battery and an internal combustion engine

Answer

Battery Electric Vehicles (BEVs) use only electric motors and batteries. Plug-in Hybrid Electric Vehicles (PHEVs) combine a smaller battery with a gasoline engine, offering both electric-only and hybrid driving modes.

Question 2

What does kWh measure in electric vehicle batteries?

Accepted Answer

Kilowatt-hours, the total energy storage capacity of the battery

Answer

kWh measures the total energy a battery can store. A higher kWh rating generally means greater driving range. For example, a 100 kWh battery stores enough energy to run a 100 kW motor for one hour.

Question 3

What is DC fast charging and how does it differ from Level 2 charging?

Accepted Answer

DC fast charging bypasses the vehicle's onboard charger to deliver high-power direct current, charging much faster than Level 2 AC charging

Answer

DC fast charging delivers 50-350+ kW directly to the battery, enabling 10-80% charge in 15-45 minutes. Level 2 AC charging (6-19 kW) uses the vehicle's onboard charger and takes 4-12 hours.

Question 4

What is thermal management in EV battery systems?

Accepted Answer

Systems that maintain optimal battery temperature for performance, longevity, and safety through heating and cooling

Answer

Battery thermal management uses liquid cooling, heating elements, and heat pumps to keep battery cells within their optimal temperature range (typically 20-40°C), which is critical for performance, charging speed, and lifespan.

Question 5

What is vehicle-to-grid (V2G) technology?

Accepted Answer

Technology enabling EVs to send stored electricity back to the power grid during peak demand

Answer

V2G allows electric vehicles to function as mobile energy storage, supplying power back to the grid during high demand periods, potentially earning money for EV owners and stabilizing the electrical grid.

(CAE) Certified Automotive Engineer Practice Test

(CAE) Certified Automotive Engineer Practice Test

CAE EV Technology & Future Trends 1