Hope this is the right place to post this.
I recently bought a used (~10 cycles) 10s5p 30Q battery pack (before I learned about the quality control issues on the more recent packs from the builder )
The pack seems to be built with double stacked 0.1mm x 8mm nickel for the p-groups and four strips of the same nickel for the series connections.
The battery lead connections are obviously not enough, just 1 strip of nickel. How would you guys recommend improving them? Do you guys see any other serious issues?
Weak solder joints, bottle necks from super low nickel mass and poor layout, no accommodation for flex, no parallel group insulation, messy balance leads, cold weldsā¦dude thatās sus at best
I am of the current opinion that salvaging batteries sucks, if you have a lot of time it can be done but the amount of money you save is hardly worth the time so you gotta be hella bored for it to be worthwhile
So this failed after 3 welds. Iāll admit that I didnāt use a high C battery, but malectrics just worked fine with the same battery. Got all my money back from banggood right away. I guess they knew about the problem.
Just ran Malectrics for the first time. Works perfectly. Now I can cross āspot welderā off the list of tools I wanted to have.
Honestly it would probably run okay, some sharp corners and touchy welds, itās not the worst Iāve ever seen but coming from a builder specifically it is a bit poor attention to details
Is that a single stack 0.1x 8mm pack negative? Youād want to check out the conductor thread to see what you could safely pull through that. Hard to believe the pack negative is connected like that
I remeasured and the negative is actually double stacked 0.15x8mm. Should be acceptable at 35A continuous according the the chart on the conductor thread. I donāt plan on pulling more than 50A peak out of it, so Iām hoping it will be fine. I will of course be keeping a close eye on it.
Hm yeah just be careful and pad the pack well in the enclosure. Iād make sure to have foam on at least top and bottom to make sure it minimizes vibrations. Iād also add some kapton or fiber tape over the negative lead to keep it in place better.
Is this some kind of word puzzle because I canāt get my head around it
Cells are pointing north you can use folded nickle. Cells facing (Sideways)east to west you canāt?
yep you guessed it. Shoulda just thrown down the $500 for a new battery from one of the builders here instead of spending $200 on that thing. Oh well, not the most expensive mistake Iāve ever made
Iāll use it for this fall and then buy a new battery for spring.
I mean if you pull it apart and clean all the cells (that means the ends ground clean, all with intact shrink wrap, and all at the same voltage) I can put it together right for $272 and shipping, you would be sitting just at the $500 mark or so
Iām sorry that you have been taken advantage of. @Psychotiller is a fucking rogue, and needs to either stop making batteries or start doing it properly.
Pull your fucking finger out Dave, youāre a disgrace.
Is it possible to make a folded pack like this with folds on both top and bottom or is this a bad idea?
Lime is 0.2mm nickel
Dark green is copper braid
Orange balance wires go under the others in a fishpaper sandwich
)
yep you guessed it. Shoulda just thrown down the $500 for a new battery from one of the builders here instead of spending $200 on that thing. Oh well, not the most expensive mistake Iāve ever made 
