T
treez
Guest
Hello,
The following current waveform is the current that is discharging a rechargeable NiCd battery (6V, 4000mAh battery).
It is the current thats being drawn from the battery by a switch mode sepic converter.
The current has about 30% ripple, and yet the RMS and Average values of it are virtually the same.
Does this mean that it is not worth filtering this current waveform? (ie its not worth putting more filtration at the input to the sepic converter?)
(or does any ripple in battery discharge current cause great losses in the battery and harm the battery therefore need filtering out?)
(We need to know, because this battery is used in an emergency light, and we need the battery to have 80% plus capacity remaining after four years.)
Battery Discharge Current waveform (V across 0.082R sense resistor)
https://i52.tinypic.com/j6ueiv.jpg
The Average current is 1.16 Amps
The RMS current value is 1.18 Amps.
The frequency of the ripple is 36KHz
The following current waveform is the current that is discharging a rechargeable NiCd battery (6V, 4000mAh battery).
It is the current thats being drawn from the battery by a switch mode sepic converter.
The current has about 30% ripple, and yet the RMS and Average values of it are virtually the same.
Does this mean that it is not worth filtering this current waveform? (ie its not worth putting more filtration at the input to the sepic converter?)
(or does any ripple in battery discharge current cause great losses in the battery and harm the battery therefore need filtering out?)
(We need to know, because this battery is used in an emergency light, and we need the battery to have 80% plus capacity remaining after four years.)
Battery Discharge Current waveform (V across 0.082R sense resistor)
https://i52.tinypic.com/j6ueiv.jpg
The Average current is 1.16 Amps
The RMS current value is 1.18 Amps.
The frequency of the ripple is 36KHz