KONG Charger question . . .

[goldslinger]

I guess this would apply to any charger capable of charging two 3S packs fooling the charger into thinking it's charging a 6S pack.

Can I double the 'C' rate of charge when doing this with the bridge?

I currently charge at 2.5 A for single, so with the two; 5 Amps?

Thanks,
Gary

[kgfly]

NO, not for 1C charging (assuming they are 2500mAh packs). Charging two 3S in series as 6S is still the same capacity. If you would have charged the 3S at 2.5A you still charge the 6S at 2.5A. Assuming they are 2500mAh packs then 2.5A is the recommended 1C charge rate separate or in series. If you were to wire them up as 3s2p 5000mAh them then you would charge 5.0A for a 1C rate.

[cheech91060]

kenneth, can you clarify that a bit?
pretty sure i read that dual pack charging like this will take the same amount of time as charging a single pack, but i don't think this makes sense with how you explain it.

[goldslinger]

NO, not for 1C charging (assuming they are 2500mAh packs). Charging two 3S in series as 6S is still the same capacity. If you would have charged the 3S at 2.5A you still charge the 6S at 2.5A. Assuming they are 2500mAh packs then 2.5A is the recommended 1C charge rate separate or in series. If you were to wire them up as 3s2p 5000mAh them then you would charge 5.0A for a 1C rate.


I see,

If I'm fooling the charger into thinking it is charging a 6s 22.2v pack, when I actually have two 3s 11.1v, then I would charge at the rate I would a single 3s 2200mah pack, or 2.2 Amps which is 1C.

If the readout on the charger stays 11.1 volt (thinking it is a 3s2p pack, then I know I have the packs in parallel and could double the Amp output.

The charge rate would be the same on either, right?

Thanks,
Gary

[kgfly]

I see,

If I'm fooling the charger into thinking it is charging a 6s 22.2v pack, when I actually have two 3s 11.1v, then I would charge at the rate I would a single 3s 2200mah pack, or 2.2 Amps which is 1C. Yes.

If the readout on the charger stays 11.1 volt (thinking it is a 3s2p pack, then I know I have the packs in parallel and could double the Amp output. Yes, but you should know which way you are connecting your packs before you connect to the charger! Also to charge as 3s2p you would have to have a parallel Deans cable for the main power leads and a parallel balance adapter cable too.

The charge rate would be the same on either, right?
The 1C charge rate would be 2.2A for the series connection and 4.4A for the parallel connection but the total charge time would be about the same in both cases (assuming well matched packs).

[kgfly]

kenneth, can you clarify that a bit?
pretty sure i read that dual pack charging like this will take the same amount of time as charging a single pack, but i don't think this makes sense with how you explain it.If you wire two well matched (same brand, age, usage and discharge level) packs in series and connect them to your charger then it simply sees a single pack with twice as many cells in series. You charge at the same rate (ie same number of amps) as you would have charged either one of the batteries alone. So long as your charger has enough output power, the total charge time for the two packs in series will be about the same as for one of the packs alone, hence your overall total charge time is about half what it would be to charge the two packs alone, one after the other.

The 1C charge rate for a 1s 2500mAh pack is 2.5A
The 1C charge rate for a 2s 2500mAh pack is 2.5A
The 1C charge rate for a 3s 2500mAh pack is 2.5A
The 1C charge rate for a 4s 2500mAh pack is 2.5A
The 1C charge rate for a 5s 2500mAh pack is 2.5A
The 1C charge rate for a 6s 2500mAh pack is 2.5A

* All the above will take about the same time to charge at 2.5A *

Connecting two matched packs in series gives double the voltage (V) at the same capacity (mAh) and hence the same 1C charge rate.

Connecting two matched packs in parallel gives the same voltage (V) at twice the capacity (mAh) and hence the 1C charge rate is doubled.

Does that help ?

[cheech91060]

makes sense, thanks.

[goldslinger]

I'm gonna print this thread and KEEP IT !

Thanks a million, Folks !