Balance cable awg
- Thread starter Herculezz
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42OhmsPA
What's in a title?
How much current?
Are you talking between the cells?
Are you talking between the cells?
42OhmsPA
What's in a title?
If your only using a small power supply 10AWG should be more than enough, up to 30A.
You could also do them in batches of 8 since you should have enough bus bars.
I have plenty of bus bars but the cells are already all setup in my xr04 Enclosure and I would rather not disassemble the whole thing to top balance since they are in series formation, I would rather just remove the current bus bars and run cables so to not have to remove all the cells lol
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I am using the JBD-UP16S020
chrisski
Solar Boondocker
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Depends on the power supply you're using. I have a 10 amp power supply which needs at least 10 AWG to push the current.
I would use 10 AWG set with my power supply set at 10 amps. and 3.6 volts with all the cells in parallel. THat would be over 30 leads to cut and crimp.
To charge the full 305 AH, could take nearly two days until the voltage tapers off to nothing. If they partially charged prior to starting, could be as quick as an hour.
If the power supply is more amps, wire may need to be thicker.
I would use 10 AWG set with my power supply set at 10 amps. and 3.6 volts with all the cells in parallel. THat would be over 30 leads to cut and crimp.
To charge the full 305 AH, could take nearly two days until the voltage tapers off to nothing. If they partially charged prior to starting, could be as quick as an hour.
If the power supply is more amps, wire may need to be thicker.
They are pretty close in volts and I am currently charging then up in series as they are in the picture and as soon as a cell hits 3.6 I planned to taper the current on the 48v charger down until its low keeping the highest cell at or below 3.6, then was gonna disconnect the bus bars and connect the balance cables to allow the batteries to self balance in parallel for a few days, is 10 awg good enough for that? I actually have an abundance of 8awg so would prolly just make them out of that if it's good enough, if not I could double up the 8 awg on each cell.
chrisski
Solar Boondocker
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I actually can’t say if 8 or 10 AWG would be enough to cover the current surge of unbalanced cells.
I charged the battery in series like you are doing and then charged each cell individually to 3.65, the n after all voltage had settled, I connected in series.
Later, because of a bad connection which I fixed, I rebalanced my cells with the Overkill BMS by leaving always balance above 3.4 and charged the pack at 3.475 x 8 volts with no loads for 5 days and when I came back it’s balanced.
I also now believe matched cells will top balance with an active balancer if left alone for a few days.
The bms has a PC Software that tells you everything, yes through the bms
