Long story short. Started seeing a few Evolve’s around, even rode past a few on my bike, looked like fun. Begun investigating what other options were around and must have stumbled across this forum. Thought about it a bit and figured building a board would be half the fun, so why buy something off the shelf.
Anyway some of the bits are starting to come in so may as well start a build thread. Still haven’t ordered everything, in fact I’m still undecided on most components. I did a few semesters worth of electronics back in university, but that’s going back some time now… If it looks like I’m about to screw something up, it’d be great to know about it beforehand .
Arrived home tonight to find a box of batteries waiting for me.
That’s 24 A123 26650 batteries welded up in a 12s2p configuration by Marsen (Aus). Really didn’t want to buy a spot welder, so was pretty happy to find they offered a pack assembly service. Voltage for each cell group checks out at 3.3v, which is probably a good charge level for them to sit at while I get everything else together.
There’s a 2mm gap between each cell, while this is probably good from a cooling perspective it means I have a little less space to work with across the board. Might look at removing the hot glue and closing up these gaps .
The battery tabs are probably 8mm wide, and fairly thin although doubled up. Wondering if it’s worthwhile soldering some copper wire across the top?