Indonesia's e-bike shops are building their own batteries

Re:Indonesia's e-bike shops are building their own batteries by happosai on Wednesday March 20, 2024 @10:04PM (#39774232)

Having to pedal without power from battery is extremely rare on e-bikes. They have range of 100km+ and few people bike that much between charges.

LFP:s are less popular for DYI because you need a much smarter BMS to deal with the flat voltage curve when charging. A cheap, easily available open source LFP BMS should solve that.

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Re:Indonesia's e-bike shops are building their own batteries by mbgerring on Thursday March 21, 2024 @09:45AM (#39778438)

You don’t need a “much smarter” BMS for LFP, Daly BMS for LiPo and LFP are roughly the same price.

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Re:Indonesia's e-bike shops are building their own batteries by AYBABTME on Friday March 22, 2024 @01:25AM (#39787688)

For SoC many ebike BMS just use voltage curve to give a rough approximation. But with LFP you need a shunt and a coulomb counter, because the voltage curve is essentially flat until the very last Wh.

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Re:Indonesia's e-bike shops are building their own batteries by treprinum on Thursday March 21, 2024 @02:07PM (#39782189)

I ended up pedaling without power on a 3 hour trip in the mountains on a 750Wh battery/85Nm motor. Can be easily done ;-)

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