News for hackers. Stuff that matters.

A comment on GM plans electric van for business users. Parent comment

Re:GM plans electric van for business users by londons_explore on Thursday June 04, 2020 @01:22PM (#23419264)
0.5 * 1850 kg * ((60 mph)^2) = 665 483.056 joules

Supercaps are 28800 Joules per liter, so you'd be needing nearly 700 liters of them to store the energy of the car decelerating from 60 mph once.

700 liters is a lot of volume in a car where you already use a lot of the available volume for batteries - it's more than the trunk and frunk combined on a Model3.

[ Parent | on HN ]
Re:GM plans electric van for business users by m4rtink on Thursday June 04, 2020 @11:16PM (#23424739)
That might still be doable for a delivrry van or a bus, even if it is heavier. Natural gas powered already have quite a big "hump" on top for the pressure botzles with gas, I could imagine putting the supercaps there and the regular batteries inside the chasis to keep the center of gravity low.
[ Parent | on HN ]