General > General Technical Chat
Logic puzzle.... how many bus bars?
themadhippy:
For drilling stuff like copper or stainless i find my trusty ole sds drill is the ideal tool,low speed and plenty of torque,just remember to turn the hammer off.
paulca:
Hand reamer did the trick. Although it luckily fitted the drill chuck or I'd have been there all night. The reamer was not "unfaced" it was (originally) extremely sharp and so it just peeled a bit of copper out and jammed too hard to turn.
Plan B. In the drill on high speed, small squirt of lithium grease (the only thing I had handy) and it reamed them out in seconds.
Pack built... which unsuprising turned out to be 6x4 way links (each made from 3x2 hole bars) and the remaining 2 way links.
Turns out I could have saved 3 bus bars.
The fold in the pack was too long of the bus bars, so I put 2x 6AWG wire links across with 6x10 lugs. So those - - and + + junctions are un-needed as the series connection is connected via both cells.
The other end, the BMS has 2x negative lugs, 10AWG by 2. This I could have connected one of those to a - on each of the final pair.
I'm sure I have a bunch of resistence caused by stacking the bus bars, but ... it's 100 Amp classed battery which will probably never see more than 50 Amps and it's now finished. I'd estimate the "working capacity" including losses in the inverter is about 4kWh. To be tested.
The next battery I build will be bigger, more likely 300 Amp class and I'll have to plan ahead and budget proper bus barring.
Navigation
[0] Message Index
[*] Previous page
Go to full version