Most of time it happens in the BMS shunt you should use clamp meter to check the motor surge and for BMS on cells cable test all 13 cells voltage if voltage is good then connect + and - cable directly to battery pack and test the power surge so simply replace BMS much Bater buy smart BMS Thank you for shearing God bless you.

@EbikeRepairs

4 ай бұрын

Good idea thankyou! I did replace it and it was OK after that 👍

Exactly my battery pack...thanks for the heads up.

@EbikeRepairs

4 ай бұрын

No problem 👍

had this issue first week when i got the bike and i done some upgrades because yamee sent me a new battery so i swapped both battery bms boards for daly 30a bms installed second battery on the back rack connected in parallel thru xt60 plug on frame and ditched the stupid frame plug to a wired xt60 connection done about 4000 miles since with 0 issues what so ever and with both batteries in parallel connected all the time the range and power is awesome

@EbikeRepairs

4 ай бұрын

Great stuff! Be careful with paralleled batteries, one WILL degrade before the other, I would use them one at a time only or use one of those multiple battery adapter jobbies you can buy from eBay :)

@marbesky

4 ай бұрын

@@EbikeRepairs been in parallel for around 3 years mate and they still work like first day

@EbikeRepairs

4 ай бұрын

I'm pleased for you :)

I have a 48V 1000W motor and a controller of 15A rated current and 30A maximum current with a battery of 54V 12.5A The motor spins freely without issue but on load it accelerate to about 15km/Hr the power cuts off, display refreshes (l am clueless if it"s the BMS or controller cutting off power and why] Pls help.

@EbikeRepairs

2 ай бұрын

I'm really not sure, sorry. Sounds like BMS/ cells. Can you swap batteries with a friend for a day?

Ps that is the cheapest possible bms money can buy on this planet its around £3 in china

@EbikeRepairs

4 ай бұрын

Yes they're normally OK but this one failed

Your finger ringsssss are making me nervous.

@EbikeRepairs

4 ай бұрын

Kaboom! Fingies go bye bye?? 😱

How satisfied are you with Docreate spot welder ?

@EbikeRepairs

4 ай бұрын

It's brill, just you can use it faster than the caps discharge so you have to let it charge back up once it hits 4.4v or the welds are weak...

@diyzona

4 ай бұрын

@@EbikeRepairs thanks. I will provide more amps to charting port. And can it really weld 0.3 or at least 0.2 on top of 0.2

@EbikeRepairs

4 ай бұрын

0.15 x 2 works fine!

Is from BMS ....

@EbikeRepairs

4 ай бұрын

the BMS was faulty!

You do know that wearing all those metal rings is dangerous, right?

@EbikeRepairs

4 ай бұрын

Luckily they're ceramic! ❤️

@mrcleanisin

4 ай бұрын

Sure fooled me. LOL. Do they have a purpose?

@EbikeRepairs

4 ай бұрын

They're NFC tags, I use them to open doors :)