eli5/Electric cars

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There is so much discussion about charging stations and batteries being barriers to producing economical, practical electric cars that can travel long distances without charging. (I live in Australia where distance is a real ‘thing’)

Am I missing something?

Why can’t such a vehicle use a “dynamo” system to produce its own energy once in motion?

In: Engineering

4 Answers

Anonymous 0 Comments

Because as they’re driving, they’re expending energy, and even with a high efficiency dynamo system, it wont ever be able to produce as much as it’s expending.

Imagine if the car is using 100W/m, and the dynamo is only charging at 25W/m. Out of a 1000 watt battery, you’d only effectively get 2.5 extra hours of runtime.

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