pgt400 wrote:pic maybe better....
am i suppose to look at this from left to right ? i was looking from right to left every time i approached it to try to understand it
but couldnt figure it out, and today after few tries in few days my head said holy sh*t i can look from the other side, it makes more sense, looks like parallel charging ? (just making sure, i must make sure cos if it took me few days to see it from another angle maybe im still missing something). i forgot to notice or more correctly my head didnt brought this fact up from my memory to my attention that i should look at positive negative leads and follow a revers flow of electrons HA HA.
GGoodrum wrote:All Lithium-based chemistries don't have this "self-absorption" capability, so when the first cell is full, that's it, no more current flows to the rest of the cells. By adding a shunt circuit to each cell, a certain amount of current can bypass the full cell and flow through the shunt, so that it is available for the next cell in series.
technical question just trying to understand the work of it, when the cell is full it got 3.65v back EMF against the charger, does the current diverts because the cells BEMF repelles it so chargers current starts flowing through the shunt which is with less resistance, and the cell in this case is like an electrical type of shunt ?
and chargers usually hit bats with more volts, so if total voltage of drained 10s LiFePO pack is 25v and the charger is 40v how is the charger doesnt kill cell by cell, charging first cell full and continuing to overcharge it cos it got more volts to overcome cells 3.65v resistance, is there some component that divides the voltage from the charger ?
if there is something that divides the voltage for the cells anyway, wouldnt it also work with simply having a 4v charger with high amps and BMS that parallely charges the cells ? (im thinking laymen-y here, volts stay same in parallel, amps divide)
or it just complicates the circuitry more this way ?
lets see what other stupid questions i have
, general 1, those balancing boards mentioned earlier, when they are connected to 1 of the charges as icharger, GT A8, turnigy, the balancing bleeds the higher SOC cells ok, but does the charger kicks in again and again after every bleed to top the high cell till the lower catches up, or it simply bleeds the high cell lets say from 3.6v to 3.3v because the lower cell is at 3.3v and all operations stop ?
i saw stand alone balancing boards i think, do they just bleed the top cells to match lower cells so a user could start a charge with level SOC cells ?
are there stand alone balancing boards that dont just bleed but actualy transfer current from cell to cell for balancing ? (i think i saw something like that because it was said the board balances at 300ma and takes 80ma for operation)
say thanks to the guy who linked me to this thread, if i wouldnt read this i wouldnt have the new stupid questions