I’ve had bit of conflicting information surrounding what I need in regards to a bms/balance charger etc. I plan on running batteries>loopkey>esc>motor, and using a balance charger to charge the batteries separately, is that all I need to run or do I need a bms aswell for protection or? thanks
Without a BMS you would need to monitor your pack voltage if not each cells individual voltage. Discharging past 3.5v under load will damage lithium ion or lipo cells.
What kind of connectors do you have on your 5s lipos? And what kind of connectors do you want to use? I’d recommend xt90 anti spark connectors for your loop key.
And thats just a picture of a BMS. Do you have a link? There are bare bones BMS and some that are programmable and have bluetooth apps. Also theres the choice between separate port and common port charging which you dont have to worry about since you’re using a separate balance charger.
What you will need to go from 2x 5s lipos to connect to a BMS is a wiring harness. Like this:
xt90 and JST-XH balance connectors, ill use xt90 and yeah that’s what I’ve ordered for the key
out of stock and can’t find in Aus, could I attach 2x female jst’s to the 10s cable the comes on the bms
Yes that would work too. Be very careful with not only the wiring but connecting the BMS in the right order. Also I would shop around and get reviews for BMS units and check out what features they offer.
what do you think? I plan on bypassing also
how do you calculate whether you need the 20,25 or 30a version
You’ll need to figure out the maximum amp draw from your motors and what your batteries are capable of. Then add in 30% more just to give some headroom. 30a sounds like it would be too low.