Electric 'pedicab' question

On Sun, 1 May 2016 22:53:38 -0700 (PDT), snipped-for-privacy@gmail.com Gave us:

They are using LiFePO4 batteries these days.

SLAs are so yesterday, and so heavy.

The only drawback of LiFePO4 is their price.

Lead acid is heavy. I don't know about the motor but if it's a pedla cab then maybe the starting torque is provided by pedal power.

George H.

Probably weight, power, and power to weight ratio.

A BLDC motor with rare-earth magnets will be smaller, lighter, and more efficient than any field-excited motor of the same general output capability.

LiPo batteries have similar advantages over lead-acid.

Whether, over the lifetime of the pedicab, this adds up to an overall advantage -- who knows?

It looks like it's for the rich.

For the rest of us, sealed lead-acid batteries with series wound motors :D

Or simply walk :p

Michael

Precisely the point. More interesting is the fact that this advertisement is by a Taiwanese company.

Yes, it's not 1910 anymore. There have been advances in motors and batteries.

you can't do regenerative braking with a series motor. that'll reduce range.

same reason they don't use lead-acid for primary power in other electric automobiles, low energy/weight ratio.