need JST-XH 6s Y adapter

[_paralyzed_]

I want to run two 6s packs in parallel, and need a Y-connector with 2 female leads and 1 male lead to connect my balance taps in parallel. These will always be ran and charged together so the two batteries will act as a single 2p pack. Can anybody link me to one, or make me one?

[Tempted]

You would need a 12s balance tap to do this. I'm not even sure where you could get one. Depending on the charger, you likely wouldn't even be able to use your's to charge 12 cells at a time. I know my BC6 only charges 6s, as with most sub-$200 chargers. I would personally just balance the batteries seperately and avoid all the wire. Are you looking for a Y-Harness for the power leads, or just the balance taps?

[_paralyzed_]

I will charge at 6s with the batteries in parallel, 6s2p. I need two female 6s taps and a male 6s tap all wired together in a y adapter. Can anyone find, or build one?

[Tempted]

You can't charge 12 cells as a 6 cell pack. You need to balance each cell individually meaning each cell needs its own balance wire. The charger can't balance 2 cells in parallel with the same lead.

[brushlessboy16]

You can use align balance taps, they are the same as jst.


i could probably make one, but i dont know if the balancer would see the toatal voltage of both cells (8.4) or just 4.2v


But if your willing to get the supplies, i can make you one

[Tempted]

The balancer only sees 4.2v per cell. The only way to make this work is to have 2 female 6s taps into one male 12s tap.

[brushlessboy16]

Originally Posted by Tempted

The balancer only sees 4.2v per cell. The only way to make this work is to have 2 female 6s taps into one male 12s tap.

im not sure about that... wouldnt that be wiring the cells in series?

[Tempted]

No, that is parallel. You can't run balance taps in series. You can not use the same wire to balance two cells. Also, if his charger only charges at 5 amps(many peak at 5), it would double the charge time. It doesn't make sense to charge 2 six cell LiPos at one time. If he has 5ah packs and his charger will charge at 5a, it will take one hour to charge. If he tries to charge them in parallel, 10ah total, it would take 2 hours to charge. Where is the benefit of wiring everything up to have the same charge time? And you still need a 12s balancer.

[brushlessboy16]

Originally Posted by Tempted

No, that is parallel. You can't run balance taps in series. You can not use the same wire to balance two cells. Also, if his charger only charges at 5 amps(many peak at 5), it would double the charge time. It doesn't make sense to charge 2 six cell LiPos at one time. If he has 5ah packs and his charger will charge at 5a, it will take one hour to charge. If he tries to charge them in parallel, 10ah total, it would take 2 hours to charge. Where is the benefit of wiring everything up to have the same charge time? And you still need a 12s balancer.

ahh i get what your saying, i was overthinking it

[_paralyzed_]

tempted- you're not understanding what I'm saying. They make parallel packs all the time, that's what the "p" is. i.e. 6s2p A 6s 2p pack has 12 cells, 6 individual banks of two cells in parallel. Each individual bank of two cells is seen and charged as one cell. Since they are in parallel, the voltage, 4.2., stays the same, but the amperage doubles. Two 5000mah cells are now one 10,000mah cell. Two cells in parallel will always self balance like two buckets of water connected by a hose. I am simply taking two 6s batteries and making one 6s2p battery, except all my wiring is on the outside via balance taps instead of inside under the shrink wrap. The benefit will be only having to care for one battery instead of two, and my e-maxx takes two batteries so this will work well for me.

[Tempted]

Its your battery, you can do what you feel necessary but you will have problems doing what you are talking about. If one cell goes, it takes the other with it. So instead of a dead pack, they are both toast. How many amps can you charge at? Unless your charger can charge at 10a then you aren't gaining anything but a headache.

[_paralyzed_]

yes 10 amps, an eos610i charger. In rethinking the way the balance taps are wired I don't think I can make the parallel connections I desire. Anybody?

[BrianG]

As long as the respective cell in each pack is EXACTLY the same, you should be ok. The balance tap wires should be large enough to allow enough current (should be small) to equalize any difference between each parallel cell. Ideally, you'd have the parallel cells connected with a higher current wire, or just parallel the tabs on the cells directly.

As far as wiring, just parallel everything. How I would do it is:

1: Tie both main - wires together.

2: Hook a 0.1-0.5 ohm resistor between the two main + leads. This will equalize the whole pack together. Even though they may be balanced prior to hookup, there is still a chance of some difference. The resistor will limit any current while they equalize. Measure the voltage drop across this resistor; when you see 0v, they are equalized perfectly.

3: Remove the resistor and tie the main + wires together.

4: Put that resistor between the two balance wires of the first cell. Measure the voltage drop across this resistor; when you see 0v, they are equalized perfectly.

5: Remove the resistor and tie those balancer wires together permanently.

6: Repeat steps 4 and 5 for each balance wire.

Seems like a PITA, and may not be needed, but this how I'd do it to be perfectly safe...