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Lithium Titanate (LTO) battery bank build.
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<blockquote data-quote="hispls" data-source="post: 8658399" data-attributes="member: 614752"><p>So drilling copper bar is an absolute nightmare. Took us almost 40 man hours to get the bar cut up, drilled and fit. If I were to do it again I could probably get it done in a bit less time (figured out a lot of stuff the hard way) but just getting the original template piece cut was very tedious. I'm sure the better metalworking shop you have the better this gets. I bought the copper from Storm Power Components. They were very helpful and fast to ship. They offered custom cutting/machining but like anything you're out for a rather hefty setup cost. So it would cost probably 20$ per piece to just get 20 cut for you but if you ordered 200 pieces you could probably get it down to a few bucks per piece. China had some interesting bus options but none were terribly cost effective or practical for our purposes and I'd have still wanted some bar for the terminal end. </p><p></p><p>Each cell was within a couple 100ths of a volt resting and banks are resting at 13.48. We assembled 6P3S banks which will be jumped by those 4 hole bars once they're put in place. Figured that's a more manageable size to carry around and install.</p><p></p><p>If the rain ever lets up I'll be building up some boxes for them then drilling some holes in the terminal ends to which I can bolt ring terminals. For scale, the larger batteries in the picture are the 110AH BatteriesPlus Dekka and the small ones are ATV size ones we bought from Michael Lane a few years back on this forum.</p><p></p><p>[ATTACH]1591[/ATTACH]</p><p></p><p>[ATTACH]1592[/ATTACH]</p><p></p><p>[ATTACH]1593[/ATTACH]</p><p></p><p>[ATTACH]1594[/ATTACH]</p></blockquote><p></p>
[QUOTE="hispls, post: 8658399, member: 614752"] So drilling copper bar is an absolute nightmare. Took us almost 40 man hours to get the bar cut up, drilled and fit. If I were to do it again I could probably get it done in a bit less time (figured out a lot of stuff the hard way) but just getting the original template piece cut was very tedious. I'm sure the better metalworking shop you have the better this gets. I bought the copper from Storm Power Components. They were very helpful and fast to ship. They offered custom cutting/machining but like anything you're out for a rather hefty setup cost. So it would cost probably 20$ per piece to just get 20 cut for you but if you ordered 200 pieces you could probably get it down to a few bucks per piece. China had some interesting bus options but none were terribly cost effective or practical for our purposes and I'd have still wanted some bar for the terminal end. Each cell was within a couple 100ths of a volt resting and banks are resting at 13.48. We assembled 6P3S banks which will be jumped by those 4 hole bars once they're put in place. Figured that's a more manageable size to carry around and install. If the rain ever lets up I'll be building up some boxes for them then drilling some holes in the terminal ends to which I can bolt ring terminals. For scale, the larger batteries in the picture are the 110AH BatteriesPlus Dekka and the small ones are ATV size ones we bought from Michael Lane a few years back on this forum. [ATTACH]1591._xfImport[/ATTACH] [ATTACH]1592._xfImport[/ATTACH] [ATTACH]1593._xfImport[/ATTACH] [ATTACH]1594._xfImport[/ATTACH] [/QUOTE]
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Lithium Titanate (LTO) battery bank build.
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