3s -> 6s balance lead adapter for 3s batteries

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I have two of these 3S lipos:

I wanted to emulate a 6 cell battery by hooking two of the 3S batteries together. So I got this balance adapter:

I put the main red from one battery to the black of the other to combine the batteries into series. Then I plugged in one end of the balance adapter to a battery.

But when I connected the balance adapter to the 2nd battery it vaporized one of the pins in the connector (black cable). I left it in there for a few more seconds before pulling it out, but the balance lead is now stuffed.

Have I done the wrong thing with the balance lead? I worried how on the 6s end of the balance lead the red and black are soldered together at the middle pin.

 

[miuan]

why don't you check the conduction of respective pins with a multimeter. since it's vapoized, the connection is incorrect.

 

[dogman dan]

Were the main leads connected to anytihing? Like paralelled?

Pretty hard to get the plugs to go in upside down, so I suspect you had the batts paralell connected. How else would you get that kff?

 

[LegendLength]

I had the red main lead of battery 1 (3s) and the black lead of battery 2 (3s) connected to each other. So the two batteries were in series.

I'm scared of continuing with my pack build now because I don't want to spark any other batteries.

One perhaps important detail I left out was that I did a pack successfully before the one that sparked. With balance leads and everything. So it pointed towards the balance lead being faulty for my 2nd attempt that failed. But I just can't understand why the red and black are paralleled in those balance adapters. You can't see it from the picture but black balance lead from battery 1 is paralleled on pin number 4 with the red balance lead from battery 2.

 

[NeilP]

Sounds like you connected the balance plug from pack No.1 in to the socket for Pack No.2 on the harness

The balance lead from the first pack would have to go to the smaller socket whose black wire connects to the first connector on the bigger 7 pin connector. The black line from the second pack will connect to the samller connector, whose black wire connects to the middle of the big connector.
The big connector should have a pin in the middle that has two wires connecting to it.

 

[LegendLength]

I think I get what you're saying. The balance adapter is not symmetrical so I need to take care which battery goes into which balance plug on the adapter.

Thanks so much for that it makes sense now. But a question remains for me which battery is designated as battery 1? Is it the battery who's red main wire goes into the black wire of the other battery?

By 'battery 1' I mean the battery who's balance plug goes into the adapter which has the black cable as pin 1. I might try and draw a diagram because it seems a bit confusing to describe for some reason.

 

[LegendLength]

Diagram is below:

 

[NeilP]

From the picture, you got from the site you bought from ..it is impossible to say. need a top shot of the bigger socket with the 7 pins.

But I think your description in text is correct

If we take your drawing of the pair of batteries and battery "1' being the one with its main red connected to the negative of the second battery

Battery balance plug one ...pin 1..black connects to first black single wire on the big plug.

Balance plug from battery 2..its 'Pin1' ..also black will connect to the connector that is also connected to the red wire (pin4) of the Battery 1 balance plug.

Actually on a second look, you can tell from the picture..
OK, so we can't see the pair of wires connected to the same pin that I would expect to see in the middle of the big connector.
BUT we can see the negative from the socket you have circled in Blue with B1
That goes to the first connection on the 7 pin..so the other black from B2 green must join up with the red wire (Pin4) from the B1 socket.


Now all you gotta hope is that you only burnt the adapter balance wires and not the balance wires coming all the way from the battery. If you have then you need to open the pack up and replace the wires all the way down to the top of the battery...
And if you have to do that...then unless you have need to keep the packs as 3s, you could just wire it up as a 6s pack ..and forget any adapters..just tae the whole thin gup as a 6 s pack

 

[aCeMadMod]

hi here some help i been look to use 25x lipo nano tech 3s 2200 ahm , the two cheaps way. only able to buy from hobby king, http://www.hobbyking.com/hobbyking/store/__9910__2_x_3S_6S_Splitter_JST_XH_5pcs_bag_.html

and this one look like it work all kinds of batterys without need change wires http://www.hobbyking.com/hobbyking/store/__10993__Twin_pack_charge_lead_2_x_3S_6S_w_XT60.html

i hope help other out as well