3 ms·
Yeah I've seen this, it also looks like a submarine commercial to me. What I'm more interested in is it's specs. Can it really charge as fast as they say? Does
by leesec 7y ago
Yeah I've seen this, it also looks like a submarine commercial to me. What I'm more interested in is it's specs. Can it really charge as fast as they say? Does it really have that range and acceleration?
I've seen the shell of one in person, but it just seems to me if you actually could make an electric truck go 0-60 in 3 seconds and last 400 miles you would just make a video of it doing that instead of making a marketing video of putting a grill in its "gear tunnel".
- new_realist 7y agoRivian disguises their trucks as F-150s for real world testing, so good luck finding a video not made by them.
- cloudwalking 7y agoEV acceleration is directly proportional to how much current you can pull out of the battery pack, which is directly proportional to the number of battery cells, which is directly proportional to overall range... On paper, yes those numbers are feasible.
- dzhiurgis 7y agoWrong. Acceleration is driven by voltage, current dictates top speed.
- Dylan16807 7y agoThey're a little wrong, mostly by conflating current (amps) and power (watts) because of standardized cells, all with the same voltage. This post is worse. It's easy to get any voltage you want out of a big battery pack. And it's pretty easy to convert between voltages. The hard part is sustaining whatever max voltage your motor can accept, which is a matter of power. If your motor is big enough, and your electronics are at least competent, the limiting factor is the power your battery can supply. Edit: Like, a Model S battery supplies about 330 volts and rearranging the battery cells in a simple way would make it supply 4000 volts at lower current. You could replace the coils in the motors to accept that newer voltage and get very similar performance but with significantly higher chance of electric shock.
- dzhiurgis 7y agoSorry then. My experience is with ebikes where more voltage gives you more torque. More amps - more top speed. But maybe the dash reports it differently and from POV of a controller.
- samb1729 7y agoFor constant resistance, voltage is proportional to current so "acceleration is directly proportional to how much current you can pull" is equivalent to "acceleration is directly proportional to how much voltage you can pull". I don't think it's particularly helpful to bluntly tell someone they're wrong like this. (Disclaimer: not an expert)
- Obi_Juan_Kenobi 7y agoIf anything, it's the opposite; for a given motor winding, more voltage will increase the top speed, and high-load draws more current. That's why electric motors can burn out if you stall them. The reality is more complicated when you can vary the motor design, Kv, etc.
- davidgould 7y agoThis is exactly backwards.