this post was submitted on 03 Jul 2023
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Technology

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[–] [email protected] 9 points 1 year ago (2 children)

Regenerative braking has more influence on battery charge in stop-and-go traffic than it does on thw highway

[–] [email protected] 1 points 1 year ago

As well, EV’s lose very little of their energy to heat or other losses between the battery and wheels unlike ICE vehicles. The result is drag plays a more significant percentage of where the energy is “going”, so the impact of higher speeds on range is greater then it is for ICE vehicles.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

You beat me to it, regenerative braking is strong in modern EVs. In several of them you can one-foot drive them, meaning take your foot off the throttle pedal, and the generator(s) will start harvesting hard enough to slow the car to a stop, charging the batteries the whole time. You only need the brake to emergency stop. And if you do choose to brake, you are just harvesting even more energy.

[–] [email protected] 2 points 1 year ago (1 children)

Next you tell us that they have more mileage in moderate temperatures rather than in the winter or the summer…

[–] [email protected] 1 points 1 year ago (1 children)

The reason this is interesting is because it's the reverse of gas cars. Typically the best efficiency of a gas vehicle is on the highway but for EVs you get much more efficiency in local streets

[–] [email protected] 1 points 1 year ago

Well that’s only true if you don’t drive fast. When you go above 120 km/h you will see that the fuel consumption increases noticeably

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

This is something everybody with an ev already knows. Drag is a big factor at high speeds. But under 40mph (65kph) it's pretty negligible. If you did a constant 30mph you could probably triple your estimated range.

With an ICE vehicle, you're wasting a lot of energy at low speeds being inefficient. But with an electric motor, you're always using exactly as much energy as needed to move.

[–] [email protected] 1 points 1 year ago

Something about intermittent power draw vs. constant draw.

I have the same effect on my electric dirtbike. I get a lot more mileage off-road up and down hills at 15-40km/h than I do on flat road at 70 km/h.