Rednecktek
Solar Wizard
Hey all, my project with my nephew is about to start and I just realized I wasn't sure about the compression aspect. It's going to be a 4s pack of the Eve 304Ah cells. When I made all of my previous packs for my brother's pop-up camper, the solar dolly and the portable diesel heater project I did the initial charge with a battery charger, then disassembled the pack and spun the cells around for the top balance, then spun the cells back around for final assembly where I actually strapped the cells together.
Looking back, I never really worried about compression, I just strapped them together real tight with tape and called it a day. Now however, if I were to leave them loose while charging/balancing, they're going to swell up, right? Once I strap them together, they're going to shrink a bit and loosen up, right? My plan for this pack is to get some used mouse pads for padding between the cells to keep them from rubbing around on each other, but that's mostly for the environment it's going to be living it.
Basically, would it be better to strap the cells together BEFORE the initial charge and then make a harness for the top balancing so everything is all nice and tight before they swell up? Or am I worrying too much about nothing significant? Calendar aging is going to be a concern LLOONNGG before cycle count is even looked at.
Thanks y'all!
Looking back, I never really worried about compression, I just strapped them together real tight with tape and called it a day. Now however, if I were to leave them loose while charging/balancing, they're going to swell up, right? Once I strap them together, they're going to shrink a bit and loosen up, right? My plan for this pack is to get some used mouse pads for padding between the cells to keep them from rubbing around on each other, but that's mostly for the environment it's going to be living it.
Basically, would it be better to strap the cells together BEFORE the initial charge and then make a harness for the top balancing so everything is all nice and tight before they swell up? Or am I worrying too much about nothing significant? Calendar aging is going to be a concern LLOONNGG before cycle count is even looked at.
Thanks y'all!