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Old 18-04-2009, 13:40   #2241
CarloR1t
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Quote:
Originariamente inviato da Debian-LoriX Guarda i messaggi
Nel foglietto delle istruzioni è indicato così:

-Delta V / 0 Delta V
E' indicato anche nelle schede sul sito spowerking.com

Per ricapitolare, la funzione Delta V ferma la carica quando la tensione della batteria:

"- ΔV" diminuisce di qualche mV (fine carica regolare)
http://en.wikipedia.org/wiki/Nickel-...ttery#Charging
EDIT

"0 ΔV" non c'è incremento della tensione per un certo periodo di tempo (sicurezza con celle difettose?)
http://www.freescale.com/files/micro...ote/AN3392.pdf

4.2.6 Cell’s Voltage Sensing and –ΔV Detection
The negative voltage drop determines the end of charge. The amplitude of this negative voltage drop differs between NiCd and NiMH chemistry. This amplitude is larger on NiCd chemistry and is in the range of 10–th millivolts (20 to 50mV). The NiMH chemistry has this voltage drop significantly. It varies from 2 to 5mV or it can be equal to zero. The amplitude also depends on the used charging current (higher current = deeper voltage drop). This charger checks the voltage drop of -2mV or the zero voltage drop in 20 minutes. After one condition occurs, the cell is considered charged, and charging of the appropriate cell finishes. The actual cell voltage during charging is also checked. If this voltage exceeds 1.600 V, the cell is considered low-quality, or damaged, because of the high internal resistance. This cell is then refused and marked as failed.
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Ultima modifica di CarloR1t : 18-04-2009 alle 13:59.
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