hello everybody i'm working on a small vacation project to explore things, i have 8, 18650 battery connected in parrallel 3.2V-4.2V and each cell has 3500mAh total of 28Ah how fast can i charge it ?
Hi,hello everybody i'm working on a small vacation project to explore things, i have 8, 18650 battery connected in parrallel 3.2V-4.2V and each cell has 3500mAh total of 28Ah how fast can i charge it ?
This in my opinion is ridiculous scare mongering by people who do not work with these cells ... myself and digsye have practical experience ....... I am an active member of this forum https://secondlifestorage.com which deals exclusively with the use of these cells ... the members there all operate in parallel banks ....millions of people with ebikes also use these cells in parallel ...look on youtube , they make their own batteries by joining cells in parallel ... also e bike batteries sold by companies have these cells in parallel ...so do nearly all laptop batteries operate 2p3s (cells in parallel )i was chocked by truth that one cell could draw 27A and the rest draw just 1A that could be catastrophic !
Hi,thanks you all for your answers so i took take to really read all the asnwer one by one they are all useffull, all 8 battery are identical max charge voltage is 4.2 +- 0.5 volt
max current charge is 1.0C (3400mA) standart charge is 0.5C and 1700mA end current cutoff 50mA
Nominal Voltage Average 3.635V
energy (3500mA/3400mA) : charge/discharge
after reading i was conviced that i could charge my power bank at 4V 28A for around 1h charge and the 1000 cycle sounds pretty good
and when i read the last post of MrAI i was chocked by truth that one cell could draw 27A and the rest draw just 1A that could be catastrophic !
and i can't disconect them for each time of charge !
charging 3500mA*8=28A at 3.5A would take around 9h:8' that is huge
is there any logic circuit solution to disconnect the battery automatically while charging like a gate ? (i know this sounds a litle stupid)
Actually nope - IF you simply set a 3400mAh charge, then all parallel cells will divide the current equally (or close enough). Should 1 cell go O/C... so if i put protection circuit between every positive and negative of two battery to limit the current that pass trought it to 3400mAh that would make second battery takes less than 3400mAh and and until the last could take 0Amp right ??
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