3S4P Vs 4P3S - Parallel/Series Vs Series/Parallel

Quinc

1 kW
Joined
Apr 18, 2016
Messages
314
Which is better and why?

Would be 12x 4S lipo packs running 50v 20AH peak around 300amps gokart.

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Or

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Short answer is that its better to parallel first, serialise second, so option 2.

In reality, both designs are going to cause you headaches. At 300A and so many connections/small cables, you're gonna be in a world of hurt with unbalanced cells and unnecessary losses.

Best practice is to strip all batteries down to individual cells, then build 12 x 1S4P blocks and make that into a 12S4P battery.

On a phone, so can't really give too many details, but if you care enough to rebuild, post back and I'll answer in detail.
 
Fair enough.

Just keep an eye on balance as you said you would, but also check for any connectors or wires that seem much hotter than the others, after a hard run on the go kart. That may indicate a bad join, or a cell that's making up for a nearby weak cell.
 
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