Recent content by SackofFluor

Well, first of all, the merging worked without a problem, but I have not yet attached the BMS of the combined pack because I want to find a suitable case and put the whole pack into a heatshrink most likely. Both sets were more or less identically mixed/matched from 18650 Batteries of around...

@john61ct thank you for the fast reply! Do you, by any chance, also know whether it makes sense to connect a dedicated balancing board with the strands? to improve balancing especially when under load? Best, Sack

Hey Guys, I have a question (again). I am relatively new to the whole "build your own battery" thing and so far I enjoy it, some sparks, no burns, no fires so far.... I build a 7s21p Batterypack from used 18650cells. I got my BMS to work and with a small 500W inverter I drew 100Watts for...

Well first of all, THANK you guys so much. I think I might have actually set a couple of batteries accidentally on fire if I wouldn't have asked. By now, because of safety and "skill" limitations I will technically really just use as the powerwall as a learning-tool, when it comes to the...

ahh, so much information well then i will first sit down, calculate the average, median and std. Discard cells that are too low (shall i keep "too" high cells) and then do proper "mixing". Yes I will be using a Daly smart bms and thought to stop charging at 4V and discharging at around 3.3/3.4...

So you would make equal splits of the different cell types and then build packs that have "equally" distributed those splits within the individual packs? Thank you! Most likely its a very good idea to also to do most of the work outside, at least in the beginning phases :D

No, there are definitly different brands! Some of them still have their Modelnumbers: like: ICR18650-22P ICR18650-22F HW 18650 3.7G OA09 or CGR18650CG But then there are also som which don't have any distinguishable markings, those cells have a dark brown or red color. The company that gave...

Thank you for your replies so far.... So i got them from a company that couldnt/didnt sell them. they are all individually measured and range from 1600-1799mAH So they are kinda a sorted. The idea with the tinfoil is brilliant! i do assume that you do the same at the other side as well :D In...

Hey Guys, i am fairly new to the whole spiel and I got (via a friend) 300 18650 Cells, all around 1600-1750 mAh. Now, before building a battery-pack i think it would be best to balance the cells. Does anybody has a viable idea to balance these cells without putting all of them into a charger...

Hey Guys, Sorry for pestering you with such an easy question, but I am a little los when it comes to "bus bar sizing" Lets imaging i want to use a 24v Battery and a 24v inverter to draw 3600 Watt of power at 220V. When dividing 3600 Watts by 24V I end at 150 Amps. Do I understand correctly...