pfromero said:As usual, tons of great info. I was incorrect as you noted it is adding voltage when you do things in series not parallel.
So you're saying I need seven of these to get 24 volts? Cool! Thats exactly how many I have!
What I don't understand, is why my seven cells wired together (see pic)or 7s comma doesn't translate into 24 volts as is???
Paul
APD said:Sounds like you dont quite get the SERIES-PARALLEL thing yet....Figure it out with just a few cells first until you understand how to wire it. Because if you connect the wrong POS and NEG in a big battery like that, you will see some fireworks.
There are tons of pictures and videos online of how to wire it.
pfromero said:Hi again, it's apparent I made a mistake on the bus bars but I can still go in series and and get my 24 volts. However I need to look into the size of the cabling and capacity of the quick disconnects. Or possibly rewire each pack to bring it up to 24
Korishan: 7 battery packs are going into the deck box build pictured in the other Forum
Paul
skyfridge said:pfromero said:Hi again, it's apparent I made a mistake on the bus bars but I can still go in series and and get my 24 volts. However I need to look into the size of the cabling and capacity of the quick disconnects. Or possibly rewire each pack to bring it up to 24
Korishan: 7 battery packs are going into the deck box build pictured in the other Forum
Paul
Hold on. The photos just aren't clear enough to see what you did. I'm seeing seven rows of about 30cells across. Due to how your bus bars are arranged, with rows of 2, 3 and 2, I can only guess that you have 1s60p, 1s90p and 1s60p in series. That will never balance during charging and discharging, because the sets of parallel cells combine with different capacities. If that is the case, DO NOT puto those in series! Take it all apart and put it together correctly.
You can see better what you did. That's what I'm seeing, considering your reported voltage measurement.
Or maybe you have 3s60p, 2s60p and 2s60p in parallel. It's shocking that things didn't get very hot very quickly. Cell damage would be a concern.
60p=30p
In the case of 3s30p, 2s30p and 2s30p in parallel, the 3s would dump into the 2s on contact. Are your fuses any good? Are those even fuses? I'm scared.
pfromero said:Hi again, it's apparent I made a mistake on the bus bars but I can still go in series and and get my 24 volts. However I need to look into the size of the cabling and capacity of the quick disconnects. Or possibly rewire each pack to bring it up to 24
Korishan: 7 battery packs are going into the deck box build pictured in the other Forum
Paul