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BotoX / xiaomi-m365-compatible-bms

Xiaomi M365 compatible, open source firmware for ATMega328p+BQ769x0 BMS. Ninebot in proto_test branch
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Benefits of upgrade? #5

Open tbone-rd opened 5 years ago

tbone-rd commented 5 years ago

This project looks very intersting!

I have only flashed the customized firmware 1.4 (Motorconstant 34383 / 750W ) for now. With full battery and 100kg going up the hill, full throttle, i get 19-20amps on dash display. I hear a "Klack ... Klack", and torque feels pulsated. When battery is not full, it does not happen, torque just sags.

Does the battery not deliver enough current or is the motor to weak?

I'm curious what the benefit of this BMS upgrade is. More range because of higher battery capacity, ok. But for what is the voltage upgrade..only higher top speeds? Lower amps with same torque? Would higher voltage "protect" the motor from to much amps when going uphill?

BotoX commented 5 years ago

higher voltage = higher speed for longer, more torque, more power more/better cells = more capacity/range, less voltage sag, higher cycle life

The original battery is a waste for this scooter, it can do much better. The next upgrade I'm looking forward to is a better motor, not sure where I'll find one though ^^

tbone-rd commented 5 years ago

Do you have an idea about my "Klack .. Klack" Problem? Rather Motor or Battery weakness?

Yes, i was also looking around for better motor. But looks hard to find one that fits, maybe the motor for the pro (but only 300w) will be an option https://youtu.be/nMg0NjCaFfk

BotoX commented 5 years ago

No clue about the klack klack issue, try posting a video in a telegram group, maybe somebody had this issue and solved it. Could be a broken hall sensor maybe.