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Discussion Starter #1
I'll post 2 diagrams (credit I think goes to ToddsHotRods for the pic at the bottom, he started with someone else's pic, I changed it a bit more for the top pic). Note for the first one an electron traverses the same length of wire, and same number of connections, no matter which battery it goes through in any layer. Note on the 2nd picture at the bottom, an electron that stays far right goes through substantially less cable and connections than an electron that takes the scenic route by going as far left in each layer as possible.

It's probably generally a small effect, but the top pic stresses the batteries more equally than the bottom pic. I wonder, though, at NEDRA current levels if it might make a difference given how hot they run their wiring.



 

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When I sent that diagram to my battery guy he said his design will be different? He is a specialists in using pre-built series blocks then paralled into larger packs. When I get my final design I will post it. It will be a work of art. Some say you cannot get series blocks then paralleled to balance correctly, he has done this many times with great success. :D

The benefit of using pre-built packs is the quick change option if a cell goes bad. ;)
 

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There are different ways to wire in a balanced manner -- I'd be curious to see how he plans to do it.

Will you still have a way to check individual cell voltages? You are more likely to have individual cells out of balance if you wire series strings in parallel.
When I sent that diagram to my battery guy he said his design will be different? He is a specialists in using pre-built series blocks then paralled into larger packs. When I get my final design I will post it. It will be a work of art. Some say you cannot get series blocks then paralleled to balance correctly, he has done this many times with great success. :D

The benefit of using pre-built packs is the quick change option if a cell goes bad.
 

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He has not shown me the final design yet. Lets just say this is not the first series strings into parallel pack. The idea to build this type of pack came from John Metric's car using Enerland series strings. His pack balances just fine. I seen his posts on the NEDRA Yahoo board and continued to do research. My pack will be similar, but use Turnigy packs.
I don't recommend this design for long distance driving, but for 10 seconds of racing, the pack can be fine tuned between runs if needed. ;)

There are different ways to wire in a balanced manner -- I'd be curious to see how he plans to do it.

Will you still have a way to check individual cell voltages? You are more likely to have individual cells out of balance if you wire series strings in parallel.
 
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