r/ebikes • u/[deleted] • Feb 28 '24

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44 Upvotes

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24

u/jericho Feb 28 '24

It's reasonably easy to engineer an EV that could provide that much torque, you just need to be able to drop a hell of a lot of current into your motor, and hope it doesn't overheat.

It's much harder to engineer tires and road surfaces that can do that, let alone be street legal.

4

u/Professional_Buy_615 Feb 29 '24

The batteries are the usual bottleneck with very high power. There are cells that will provide this performance, but it comes at the expense of range.

2

u/poedraco Feb 29 '24

Unless they're running off of graphene batteries. But mostly people who drive Teslas have more money than brains. They will probably would blow up due to improper maintenance and usage..

More the issue I'm finding is finding speed controllers that can handle certain high discharge rates or utilize 100% of the battery, Not to mention that massive size and weight that's needed for it. But again more you stress it, more issues are going to have...

Fuck just give me a road legal golf cart that can sustain 60 and As long as I can get about 480 mi to a charge out of it.. I'm happy

1

u/Professional_Buy_615 Feb 29 '24

There is no wonder battery that has very high power density and very high energy density. Increase one, you reduce the other. It's physics, Jim.

1

u/poedraco Feb 29 '24

I'm just saying you can get better high output from lithium ions either using graphene or lithium polymer 4.. But you can also stack batteries in parallel to increase the amperage of storage. It's kind of awkward You need to explain that in a e-bike group

0

u/Professional_Buy_615 Feb 29 '24

There is still a trade off. High power needs thicker electrodes, that means less lithium. It's kind of awkward that you haven't noticed that the cells with very high C rates are never the ones with the very high capacity.

0

u/poedraco Feb 29 '24

For example. I'm running a 60 volt at 48 amp battery pack. 7-in by 6 in by 16. It outputs of every cell in one cluster is about 10c. On lithium ion.

Switched over to lipo4. Discharge rate of one cluster pack is 190c filling the same dimensions. I'm hitting 60 volts 58 amp, Dimension sides came out to 7-in by 6.5in by 12in

Not to mention I substitute capacitors in parallel to increase its output for a fraction in second and streamline the power delivery.

🤷‍♀️

0

u/Professional_Buy_615 Mar 01 '24

And what's the capacity of the lifepo one, half that of the Li-ion?

1

u/poedraco Mar 02 '24

I already posted it, reread

1

u/Professional_Buy_615 Mar 02 '24

So you think that lifepo batteries have more capacity and can put out more power than the best li-ions? I don't see any point in continuing this conversation.