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12s LiPo BMS: Will this work?


I’m going to have 4x 5000mah 3s batteries in series for 12s. I want an easy way to charge my board, so I looked into BMS. I’m new so bear with me:

  • Will this BMS along with this power supply be compatible?
  • Where do I plug in the power supply?
  • Is 60A enough for VESC/170kv motor?
    Sorry for the stupid questions


Humm…dont they charge and discharge from the same point on the board?


I’d hit up the guys that did the battery and bms group by for assistance…

@longhairedboy can you put ur two cents in ?


This[quote=“barajabali, post:12, topic:4203, full:true”]
Wel I’m using 100amp bms because this is goin on a mountain board which is going to produce higher than average amps.

I think you can get away with a 60-80 amp bms on a regular board depending if it’s dual drive or single.

And good question about the on off switch. Not sure

is what @barajabali said in a different thread


alright so this bms


You’ll have to do a bit of rewiring


The charger you listed is for LiFePo4.


As @mccloed said

Gotta be diligent … All voltage is not equal… They differ between battery chemistry

Also the amps rating can’t be under what flows through the bms…because it will fry the bms

Like I said gotta hit the guys that are making them now…the info is still fresh in their heads …lol

I don’t want to give you a :+1:t2: because I’m not 100% sure myself … I’ve been reading and watching you guys muscle through these dilemmas


What is the discharge rate on your batteries? If you are going at least 25c then get an 80-100amp BMS so you have more room if you need it. And you should only be charging your batteries at 1c so a 5amp charger will be quickest.


What do you mean by this?


I think he said it the wrong way around. If your motor is drawing 80 amps and you have a 60 amp BMS then the BMS will cut out. You want a BMS that has the amps you think you will need. 80 amps is the sweet spot IMO and most packs I am going to make will have at least 80amp discharge continuous.


Just not sure what he meant burning the BMS out. BMS’s are there to prevent exactly that.


I don’t think it burns them out. They just cut the power, and if you are going down a hill and there is to many amps, you definitely don’t want your power cut.



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Ahhhh … @lox897 to the rescue … Thanks


5ah x 20c = 100amp continuous. Get an 100amp BMS.


I think you mean 100A :stuck_out_tongue:


Lol. I wasn’t even thinking. I’m in bed. My bad.


it has 30c burst, so how about this?


100amps should be plenty. You want a bms with the amount your batteries can do continuously.