just a quick thread to build 2 simple packs of 6S/10P to make a nice 12S/10P
cells : samsung 40 T 4000mah 35A in 6S/10 P (25,2V/40 000mah)
enclosure : plastic box IP56 240x190x90mm (perfect fitting)
No BMS for charge et discharge
simple spot welding machine from amazon for eur 50
I printed the cell holder but you can buy it already done
then to secure the cable to the positive and negative
balance cable for 6s (has actually 7 cables) + XT90 with the fuse
solder the cable to side of the battery + balance cable
now a new toy from ISDT battair …a bluetooth device so you can check voltage via bluetooth anytime (never unplug) from android/ios …usd 5 on amazon for 6S device
with the app from ISDT battair you see this on your phone
then you can wrap the battery and put it in the case. yopu leave balance cable inside the case and the psotive & negative out via Gland plug
now regarding charging …the product from ISDT are extremelly good, very reliable and cheap.
I will post later the product I used for charging.
I dont like BMS even when bypassing for discharge , proper RC charger with latest chip are doing a much better job
this ISDT Q8 smart charger is amazing 500w 20A , you can charge the pack in 2,5 hours (from 3,45V to 4,20V) on 10A which is the maximum for these cells![IMG_0247.HEIC|375x500]
but you need an external source for powering the charger from AC current… to be fun and geeky you can use an HP DPS -1200FB 1 A
on 240V you get output of 12V 100A for less then usd 35 (second hand on ebay)
I will send more details of the HP power supply but you can power various lipo chargeurs at once in a very effective way
On 12V you can charge 25v batteries