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    1. · Registered
      Triumph Spitfire (1973)
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      Discussion Starter · #8 ·
      You might want to look at a previous discussion of interconnections and BMS for these modules:
      Battery split question
      Thanks for linking that. I'd love to go from 10s6p to 5s12p so they can all go in series. I'm wondering if I could use BatteryHookup's busbars to make a Frankenstein's 12p busbar out of three of the pure copper 6p busbars with one in the middle as a bridge. To that idea you said "but the extra electrical connections would be undesirable.", what do you mean by that? Because that approach sounds rather accessible.
      I was thinking for the 12p end plates to do the same approach: cut the discharge terminal off an end plate and bridge two of them with one of the 6p intermediate busbars.

      then I'll have a clean 40s12p battery with a proper Orion 2

       
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      Discussion Starter · #21 ·
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      ... BatteryHook up has 6p busbars for sale now 6p 300a BUSBAR FOR SPIM08HP 16ah - Copper/Steel
      That's 6P, and that's what he already has. To configure his battery as desired, without parallel modules, he needs 12P.

      Interesting things about that busbar:
      • I didn't see it when I looked, but I didn't check all of the categories
      • checking all BatteryHookup products, there are only 4P and 6P intermediate plates and 6P end plates (mis-labeled as 3P)... no end plates for 4P, no plates for larger numbers of cells in parallel
      • the construction is bizarre: as seen in any of the photos of these modules there is a notch in the plate exposing a copper section where the BMS tap is attached; this description suggests and the photos confirm that it is a copper plate with a steel plate over top, with the steel acting essentially as a big common washer
      • the steel-on-copper construction is only for the intermediate connections, while the end cells are terminated with copper plates that extend to the module terminals (no steel)
      Note that the current rating for this 6P busbar is 300 amps, which is more than needed for any rational discharge rate for these cells, but a 12P configuration would twice the conductor capacity for the same per-cell discharge rate. Much thicker copper seems like a good idea to me.
       

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