What configuration & Voltage is this?

[Carv]

Saw this on another website. I know it was done to balance batteries and have equal wire lengths but I can't figure out what it ends up being? (They're all 6V GC Batts).

My best guess is series/series 24V???

[azdave]

Looks like 2S2P to me @ 12V but what do I know?

[SunEagle]

Looks like 2S2P to me @ 12V but what do I know?

I actually agree with you. It is not a 24V system. It looks like a 12V system

I would measure the voltage between the incoming black wires. That should provide the system voltage.

[Ampster]

Looks like 2S2P to me @ 12V but what do I know?

I would guess 2P2S.The first two negatives and last two positives are paralleled. The four connections in the middle are the serial/parallel connections of the buddy pairs. I agree it looks like 12 volts based on the 3 fill caps on each battery. They did a good job of keeping the interconnects the same length. It looks like they also staggered the serial interconnect so that that current would be balanced between buddy pairs.

[azdave]

I would guess 2P2S.

I came from the earliest days of ganging up gobs of cell phone batteries to get the voltage and capacity we needed for electric flight and we always listed the number of cell in series before the number in parallel so 2S2P for me. Ha!

[Ampster]

I came from the earliest days of ganging up gobs of cell phone batteries to get the voltage and capacity we needed for electric flight and we always listed the number of cell in series before the number in parallel so 2S2P for me. Ha!

I agree the traditional method is to call out the serial connections first. Fortunately the result is the same voltage. My perspective has been from forums like endless-sphere.com and diyelectriccar.com where parallelling Lithium cells is common, and somehow a different tradition has emerged. I should remember that when I post to forums that are not Lithium centric.

[chrisski]

I’m guessing the two smaller wires are for battery monitoring. If that’s Correct I’m guessing end and mid point voltage monitoring,