I have 14, 3000f 2.7f capacitors. Wired in parallel pairs then wired in series together.
I'm looking for something simple yet effective in terms of a balancing circuit. I'm using 50 ohm bleeding resistors right now, but those drain the cap down over a couple days and because it's wired in parallel with a battery, drains the battery.
The resistors work well, but I'm trying to get to the point where I don't have to tend to the setup and either wire the battery/cap to a charger or unhook the capacitor then recharge it later if I won't be there using it for a few days.
I've looked into Zener diodes to only bleed the capacitors when their voltage gets too high, but it seems like they don't allow enough current though to do this effectively. At least not the ones I was using. 8, 2.5v zeners in parallel would only allow a bleed current of 35ma with a capacitor pair charged to 2.65v
Ideally: I'd like to limit the maximum voltage of any individual capacitor to 2.4v, mainly for my own OCD. But also so I have some overhead since the capacitors will be charged with a 400 amp charge, and discharged with an approx. 1000 amp load.
If that's not practical, then something that will allow me to discharge the bank from 16.8v down to 11.5v safely without risking "reversal" of any of the individual cells.
Here is a picture of said bank. Excuse the odd configuration, it was the only way I could get it to fit within my space requirements lol
Any ideas? I've done some searching for balancing circuitry before, but given that I'm really new to this whole circuit diagram thing, I just end up glazing over when I see the diagram.
I'm looking for something simple yet effective in terms of a balancing circuit. I'm using 50 ohm bleeding resistors right now, but those drain the cap down over a couple days and because it's wired in parallel with a battery, drains the battery.
The resistors work well, but I'm trying to get to the point where I don't have to tend to the setup and either wire the battery/cap to a charger or unhook the capacitor then recharge it later if I won't be there using it for a few days.
I've looked into Zener diodes to only bleed the capacitors when their voltage gets too high, but it seems like they don't allow enough current though to do this effectively. At least not the ones I was using. 8, 2.5v zeners in parallel would only allow a bleed current of 35ma with a capacitor pair charged to 2.65v
Ideally: I'd like to limit the maximum voltage of any individual capacitor to 2.4v, mainly for my own OCD. But also so I have some overhead since the capacitors will be charged with a 400 amp charge, and discharged with an approx. 1000 amp load.
If that's not practical, then something that will allow me to discharge the bank from 16.8v down to 11.5v safely without risking "reversal" of any of the individual cells.
Here is a picture of said bank. Excuse the odd configuration, it was the only way I could get it to fit within my space requirements lol
Any ideas? I've done some searching for balancing circuitry before, but given that I'm really new to this whole circuit diagram thing, I just end up glazing over when I see the diagram.
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