Better Battery info suggestion
geschrieben von Slipstream
|
04.05.2023 21:36:24 |
|
05.05.2023 09:08:59 |
Hi,
the balancer connector is not more accurate, when it comes to pack voltage. It only helps determining if cells were adrift, and 'guessing' at the SoC if the pack is idle, and even then, the pack voltage may vary, right after use compared to when it sat for some time, or with temperature.
LiPo checkers use that because it's easier to have a one-fits-all, instead of measuring at the main wires, with all the different connectors around.
Imo it would only make sense if you draw a discharge curve, for every individual pack, so you can pretty accurately determine what voltage equals what SoC (state of charge). And if you want it to be (fairly) accurate at power on, it'd have to be at idle current, with only the electronics running, at a couple of 100 mA. And you'd have to update that discharge curve frequently.
Otherwise, it'd be only another GOM (guess-o-meter), and no one wants to fall out of the sky because of a bad guess.
_If_ we could write the capacity used, to say an RFID attached to the battery, the battery could remember it's SoC.
But then, it would have to be re-set upon charging, and if you charge only partially, the charger would have to save actual SoC to the same RFID, which can then be read in the model again.
Too many variables, if it's not a closed system, like a smart phone, or an EV, which 'knows' every mAh gone this or that way.
So ... charge full, and fly until empty
like Rainer says, and if in doubt, you can still do it old-school, and set yourself a timer for the (guessed) remaining flight time.
—Eddi
Born to fly ...
forced to work.
the balancer connector is not more accurate, when it comes to pack voltage. It only helps determining if cells were adrift, and 'guessing' at the SoC if the pack is idle, and even then, the pack voltage may vary, right after use compared to when it sat for some time, or with temperature.
LiPo checkers use that because it's easier to have a one-fits-all, instead of measuring at the main wires, with all the different connectors around.
Imo it would only make sense if you draw a discharge curve, for every individual pack, so you can pretty accurately determine what voltage equals what SoC (state of charge). And if you want it to be (fairly) accurate at power on, it'd have to be at idle current, with only the electronics running, at a couple of 100 mA. And you'd have to update that discharge curve frequently.
Otherwise, it'd be only another GOM (guess-o-meter), and no one wants to fall out of the sky because of a bad guess.
_If_ we could write the capacity used, to say an RFID attached to the battery, the battery could remember it's SoC.
But then, it would have to be re-set upon charging, and if you charge only partially, the charger would have to save actual SoC to the same RFID, which can then be read in the model again.
Too many variables, if it's not a closed system, like a smart phone, or an EV, which 'knows' every mAh gone this or that way.
So ... charge full, and fly until empty
like Rainer says, and if in doubt, you can still do it old-school, and set yourself a timer for the (guessed) remaining flight time.
—Eddi
Born to fly ...
forced to work.
Sorry, in diesem Forum dürfen nur registrierte Benutzer schreiben.