EVITP EV Technology Fundamentals 2

Question 1

What is the difference between AC and DC charging?

Accepted Answer

AC charging converts power inside the vehicle; DC charging converts power externally and delivers DC directly

Answer

The location of power conversion differs between the two methods.

Question 2

What is an onboard charger in an EV?

Accepted Answer

The vehicles built-in AC-to-DC converter that charges the battery from AC sources

Answer

This converter inside the vehicle changes AC power to DC for the battery.

Question 3

What factors affect EV charging speed?

Accepted Answer

Battery SOC, temperature, charger power rating, and vehicles maximum acceptance rate

Answer

Multiple factors on both the vehicle and charger side determine actual speed.

Question 4

What is battery cell balancing?

Accepted Answer

Equalizing charge levels among individual cells for optimal performance and safety

Answer

Balancing ensures all cells in a pack operate at similar charge levels.

Question 5

What is the typical DC fast charging power range?

Accepted Answer

50 kW to 350+ kW

Answer

DC fast chargers deliver high power for rapid charging.

(EVITP) Electric Vehicle Infrastructure Program Practice Test