News for hackers. Stuff that matters.

A comment on The Breakneck Rise of China’s Colossus of Electric-Car Batteries. Parent comment

Re:The Breakneck Rise of China’s Colossus of Electric-Car Ba... by mchahn on Sunday February 04, 2018 @01:31AM (#16301655)
> accelerating quickly uses up more energy than accelerating slowly

Can you explain this to me? I know gas engines have this attribute but I assumed electric motors didn't.

[ Parent | on HN ]
Re:The Breakneck Rise of China’s Colossus of Electric-Car Ba... by andlier on Sunday February 04, 2018 @01:59AM (#16301722)
Resistive power losses in the battery pack, drive inverter, motor, and associated wiring are proportional to the square of the current. Doubling the motor current doubles the torque but quadruples the losses.
[ Parent | on HN ]