mini
from the expert @b264
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Making this connection requires the two batteries to be at the same voltage at the time they are connected, otherwise fire is likely.
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15a limited battery per vesc is silly
while you’re friend I’m sure is a competent EE, he doesn’t seem to ride esk8s
you are much more likely to damage a vesc connected to battery that shuts off
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Yeah I forgot to write that they should be charged to the same voltage. But if they haven’t been used yet, they should be both at storage voltage. But if you just charge them to the same voltage, and check with a multimeter before conencting them then imo they should work fine after.
Ahh. I think you forgot to mention you’re a dwarf. Cuz then 15A might be good enough for you. But if you’re a normal sized human being, maybe it’s time to call Jenny Craig or Weightwatchers
Was not targeted at you @Scepterr LOL
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blowing up vescs due to battery shutoff midride used to be pretty common, then people switched to bypass or much beefier capable bms
even if you limit vesc to 15A it will spike above that
@Texas_Guy if vesc safety is your goal, this isnt the way to do it I think
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you’re making a whole lot of assumptions and poor suggestions
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Forgetting to mention this is how fires get started. We can’t assume anyone reading this knows that. I wouldn’t even trust storage charge, they can easily be many tenths of a volt different even if both are at a storage charge. That’s easily enough to start a fire.
The best way is to check them with a multimeter. Don’t stick multimeter prongs in a charge port, though.
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I feel really sorry, I really should have wrote down checking whether they are the same voltage. I won’t make this mistake again.
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should we go on about the other mistakes?
some are listed in this thread
or just let it go?
They burn because the BMS is trash and switches on the lowside, this results in the two ESCs being at different ground potentials.
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No sweat man, no harm done. I appreciate the help and am an engineer my self. I know if you connect things at a different potential that the pixies start to fly and you let the smoke out.
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Will I have that issue because I am running these independently and the esc’s arent connected?
NO
no connection no p00f
there are lots of ways to accomplish what you wish…
but everything else is above your paygrade… read lots and be safe
connected independently via dual receivers is the safest possible way for you to accomplish this
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Not a problem, but a BMS should never decouple the battery from the motor controller. The motor controller would blow up the very second you would push the brakes. All VESC speed controllers have CAN controllers that match the voltage rating of the ESC. So running two individual packs is not an issue. VESC compatible, third party ESCs might not follow this design rule and extra care should be taken.
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