charging in series

[urbs00007]

charging

Bear with me whyle I type/edit a minute........No, this is kinda what I was trying to warn you against, re-read the last paragraph of my last post first, but I'll try to explain it a bit better. The pics I'm about to post are from the Revolectrix manualhttp://www.revolectrix.com/support_docs/item_1431.pdf

Now, look at it this way, the charger looks for the negative, then a node at each cells series connection, it counts from neg, to cell 1,2,3 etc., all using another wire as a reference. Each node can be either negative or positive depending on which other wire you're using as a reference. If I test across node 2 and node 3, node 2 would read as a negative, if I test across node 2 and node 1, then node 2 reads as positive, can you see that? So when you look at the 6s diagram, consider that pack A is cells 1-3, and pack B is cells 4-6, the single wire shown as node 3 needs to be the same wire that would have been the negative for pack B

i ordered 2 balancing leads from ebay. (2) 3-s to (1) 6s. can i just plug my batteries into these adapters/

[kevinpratt823]

Yes, but like I said, pay close attention to my middle pic above. Notice the magic marker on the left 3s plug, indicating that is where the negative balance lead goes from the pack that has the negative lead going to the charger. I would suggest that once you have them together like this, you keep them together, and maybe pull the negative balance lead from the other like I did to avoid confusion. You can't just make the series connection randomly then just plug the balance connectors in either way, one dictates the other. Just use that picture as a reference, paying close attention to the orientation of the plugs, and the fact that the series connection is made with the pos from the left pack and neg of right pack.

[urbs00007]

charg

Yes, but like I said, pay close attention to my middle pic above. Notice the magic marker on the left 3s plug, indicating that is where the negative balance lead goes from the pack that has the negative lead going to the charger. I would suggest that once you have them together like this, you keep them together, and maybe pull the negative balance lead from the other like I did to avoid confusion. You can't just make the series connection randomly then just plug the balance connectors in either way, one dictates the other. Just use that picture as a reference, paying close attention to the orientation of the plugs, and the fact that the series connection is made with the pos from the left pack and neg of right pack.

ok, i understand the orientation of the neg balance lead to battery neg . just wondering why the neg balance lead on the pos battery doesnt need to be connected to anything.

[kevinpratt823]

ok, i understand the orientation of the neg balance lead to battery neg . just wondering why the neg balance lead on the pos battery doesnt need to be connected to anything.

Because inside the battery it is connected to the negative power lead, which you now connected to the positive power lead of the other pack, which already has a lead going to the balance board via the 4th prong of that balance plug. Look at the two diagrams I gave you above. A 3s balance plug has 4 wires on it, a 6s balance plug has 7 wires on it, you only need 7 wires to balance a 6s, like I said earlier, study the diagrams and imagine placing another 3s diagram on top of the one shown, and connect them together, 2 wires become the same. When you connect the pos/neg to make the series connection, it is the same as the soldered link you would have inside a 6s, which would have one wire coming off it. When you make that series connection, the last balance wire of pack A and the first balance wire of pack B are now both connected to the same point on the split 6s pack, between cells 3 and 4.........I'm not sure how else to explain it, you're just going to have to go back and read what I have said a few times and look at the diagrams. 4+4=8, 6s only needs 7, 2 of the wires are now connected to the same point on the batteries via the series connection between the batteries, that is why they come together on the 6s plug of the adapter anyway, because the charger is only looking for that point on one pin.

Note-Not sure if you picked up on it, but one of the diagram pics I had posted was actually a 7s, I just edited it and put the 6s pic up.Disregard where it says 2s pack, or 6s pack in the pics, those were for the diagrams below that.

[urbs00007]

charging

Because inside the battery it is connected to the negative power lead, which you now connected to the positive power lead of the other pack, which already has a lead going to the balance board via the 4th prong of that balance plug. Look at the two diagrams I gave you above. A 3s balance plug has 4 wires on it, a 6s balance plug has 7 wires on it, you only need 7 wires to balance a 6s, like I said earlier, study the diagrams and imagine placing another 3s diagram on top of the one shown, and connect them together, 2 wires become the same. When you connect the pos/neg to make the series connection, it is the same as the soldered link you would have inside a 6s, which would have one wire coming off it. When you make that series connection, the last balance wire of pack A and the first balance wire of pack B are now both connected to the same point on the split 6s pack, between cells 3 and 4.........I'm not sure how else to explain it, you're just going to have to go back and read what I have said a few times and look at the diagrams. 4+4=8, 6s only needs 7, 2 of the wires are now connected to the same point on the batteries via the series connection between the batteries, that is why they come together on the 6s plug of the adapter anyway, because the charger is only looking for that point on one pin.

Note-Not sure if you picked up on it, but one of the diagram pics I had posted was actually a 7s, I just edited it and put the 6s pic up.Disregard where it says 2s pack, or 6s pack in the pics, those were for the diagrams below that.

got it, thanks

[kevinpratt823]

If you look at the pic of the adapter that Srislash posted, you will see that he accomplishes the same thing, his second 3s plug doesn't even have a wire going to the 6s plug.
Again, some other brands are wired differently, like Thunderpower, so it's a little different there, this is for JST.

[urbs00007]

charge

If you look at the pic of the adapter that Srislash posted, you will see that he accomplishes the same thing, his second 3s plug doesn't even have a wire going to the 6s plug.
Again, some other brands are wired differently, like Thunderpower, so it's a little different there, this is for JST.

has anybody noticed a power loss when using (2) 3s in series vs. (1) 6-s pack?

[Luck as a Constant]

charging in series

I dunno how charging multiple packs gets any easier than just buying one of these

http://www.progressiverc.com/universal-parallel-charge-board-for-jst-xh.html

It does the same thing in an easier to understand way IMO


Sent from my iPhone using Tapatalk

[kevinpratt823]

There are a few reasons I series charge my 3s as 6s, and use the individual balance harnesses.

1) I can charge all (8) 3s at once when I pair them up, that board only does 6
2) They are already paired up to run as 6s
3) Say my charger puts out 20 amps, in paralell that's 10 amps per pack for the pair, in series it's all 20 amps to the same pair of packs, half the charge time.
4)The balance connections on the board don't leave you with much wire to work with, kinda leaves your packs all sprawled out around the board, that is why I prefer the harnesses over the board, makes things much less awkward for me.