Pics of the compression fixture.
I made the end plates from some 1/2", 9 ply Birch plywood from Home Depot. This is the experimental version, once I am convinced I have everything figured out I will rebuild it using 1/2" Baltic Birch plywood I have. The end plates are 12" high, because I didn't both to cut them to final size (the end plates were cut from a 12" x 24" piece of plywood).
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There will be a bottom to the compression fixture, but the packs are going to be mounted on the rubber vibration isolators. Mounted to the bottom reinforcing tubes.
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This pic shows the Belleville spring washers. I will cut the threaded rods to the correct length when I build the individual 4 cell packs.
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This is what I have in mind for the final packs. I am using 1"x1" square tubing instead of Unistrut. The bus bars are braided copper straps. Each pack of 4 cells are individual so I can more easily remove them from my van. I live in Phoenix AZ and want to be able to move the cells to the air conditioned house when I am not using the van as an RV in the summer. The cable joining the two packs in series is a longer piece of 1/0 AWG wire. I wanted to give this piece of cable as much flexibility as possible, hence the reason why it is the longest.
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